Update vendor-sys/opensolaris to last OpenSolaris state (13149:b23a4dab3d50)vendor/opensolaris/20100818vendor/opensolaris

Add ZFS bits to vendor-sys/opensolaris

Obtained from:	https://hg.openindiana.org/upstream/oracle/onnv-gate

234 files changed, 177353 insertions, 110 deletions

diff --git a/common/acl/acl_common.c b/common/acl/acl_common.c
new file mode 100644
index 000000000000..eafc47d10f2d
--- /dev/null
+++ b/common/acl/acl_common.c
@@ -0,0 +1,1755 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/avl.h>
+#if defined(_KERNEL)
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <acl/acl_common.h>
+#else
+#include <errno.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <strings.h>
+#include <unistd.h>
+#include <assert.h>
+#include <grp.h>
+#include <pwd.h>
+#include <acl_common.h>
+#define	ASSERT	assert
+#endif
+
+#define	ACE_POSIX_SUPPORTED_BITS (ACE_READ_DATA | \
+    ACE_WRITE_DATA | ACE_APPEND_DATA | ACE_EXECUTE | \
+    ACE_READ_ATTRIBUTES | ACE_READ_ACL | ACE_WRITE_ACL)
+
+
+#define	ACL_SYNCHRONIZE_SET_DENY		0x0000001
+#define	ACL_SYNCHRONIZE_SET_ALLOW		0x0000002
+#define	ACL_SYNCHRONIZE_ERR_DENY		0x0000004
+#define	ACL_SYNCHRONIZE_ERR_ALLOW		0x0000008
+
+#define	ACL_WRITE_OWNER_SET_DENY		0x0000010
+#define	ACL_WRITE_OWNER_SET_ALLOW		0x0000020
+#define	ACL_WRITE_OWNER_ERR_DENY		0x0000040
+#define	ACL_WRITE_OWNER_ERR_ALLOW		0x0000080
+
+#define	ACL_DELETE_SET_DENY			0x0000100
+#define	ACL_DELETE_SET_ALLOW			0x0000200
+#define	ACL_DELETE_ERR_DENY			0x0000400
+#define	ACL_DELETE_ERR_ALLOW			0x0000800
+
+#define	ACL_WRITE_ATTRS_OWNER_SET_DENY		0x0001000
+#define	ACL_WRITE_ATTRS_OWNER_SET_ALLOW		0x0002000
+#define	ACL_WRITE_ATTRS_OWNER_ERR_DENY		0x0004000
+#define	ACL_WRITE_ATTRS_OWNER_ERR_ALLOW		0x0008000
+
+#define	ACL_WRITE_ATTRS_WRITER_SET_DENY		0x0010000
+#define	ACL_WRITE_ATTRS_WRITER_SET_ALLOW	0x0020000
+#define	ACL_WRITE_ATTRS_WRITER_ERR_DENY		0x0040000
+#define	ACL_WRITE_ATTRS_WRITER_ERR_ALLOW	0x0080000
+
+#define	ACL_WRITE_NAMED_WRITER_SET_DENY		0x0100000
+#define	ACL_WRITE_NAMED_WRITER_SET_ALLOW	0x0200000
+#define	ACL_WRITE_NAMED_WRITER_ERR_DENY		0x0400000
+#define	ACL_WRITE_NAMED_WRITER_ERR_ALLOW	0x0800000
+
+#define	ACL_READ_NAMED_READER_SET_DENY		0x1000000
+#define	ACL_READ_NAMED_READER_SET_ALLOW		0x2000000
+#define	ACL_READ_NAMED_READER_ERR_DENY		0x4000000
+#define	ACL_READ_NAMED_READER_ERR_ALLOW		0x8000000
+
+
+#define	ACE_VALID_MASK_BITS (\
+    ACE_READ_DATA | \
+    ACE_LIST_DIRECTORY | \
+    ACE_WRITE_DATA | \
+    ACE_ADD_FILE | \
+    ACE_APPEND_DATA | \
+    ACE_ADD_SUBDIRECTORY | \
+    ACE_READ_NAMED_ATTRS | \
+    ACE_WRITE_NAMED_ATTRS | \
+    ACE_EXECUTE | \
+    ACE_DELETE_CHILD | \
+    ACE_READ_ATTRIBUTES | \
+    ACE_WRITE_ATTRIBUTES | \
+    ACE_DELETE | \
+    ACE_READ_ACL | \
+    ACE_WRITE_ACL | \
+    ACE_WRITE_OWNER | \
+    ACE_SYNCHRONIZE)
+
+#define	ACE_MASK_UNDEFINED			0x80000000
+
+#define	ACE_VALID_FLAG_BITS (ACE_FILE_INHERIT_ACE | \
+    ACE_DIRECTORY_INHERIT_ACE | \
+    ACE_NO_PROPAGATE_INHERIT_ACE | ACE_INHERIT_ONLY_ACE | \
+    ACE_SUCCESSFUL_ACCESS_ACE_FLAG | ACE_FAILED_ACCESS_ACE_FLAG | \
+    ACE_IDENTIFIER_GROUP | ACE_OWNER | ACE_GROUP | ACE_EVERYONE)
+
+/*
+ * ACL conversion helpers
+ */
+
+typedef enum {
+	ace_unused,
+	ace_user_obj,
+	ace_user,
+	ace_group, /* includes GROUP and GROUP_OBJ */
+	ace_other_obj
+} ace_to_aent_state_t;
+
+typedef struct acevals {
+	uid_t key;
+	avl_node_t avl;
+	uint32_t mask;
+	uint32_t allowed;
+	uint32_t denied;
+	int aent_type;
+} acevals_t;
+
+typedef struct ace_list {
+	acevals_t user_obj;
+	avl_tree_t user;
+	int numusers;
+	acevals_t group_obj;
+	avl_tree_t group;
+	int numgroups;
+	acevals_t other_obj;
+	uint32_t acl_mask;
+	int hasmask;
+	int dfacl_flag;
+	ace_to_aent_state_t state;
+	int seen; /* bitmask of all aclent_t a_type values seen */
+} ace_list_t;
+
+/*
+ * Generic shellsort, from K&R (1st ed, p 58.), somewhat modified.
+ * v = Ptr to array/vector of objs
+ * n = # objs in the array
+ * s = size of each obj (must be multiples of a word size)
+ * f = ptr to function to compare two objs
+ *	returns (-1 = less than, 0 = equal, 1 = greater than
+ */
+void
+ksort(caddr_t v, int n, int s, int (*f)())
+{
+	int g, i, j, ii;
+	unsigned int *p1, *p2;
+	unsigned int tmp;
+
+	/* No work to do */
+	if (v == NULL || n <= 1)
+		return;
+
+	/* Sanity check on arguments */
+	ASSERT(((uintptr_t)v & 0x3) == 0 && (s & 0x3) == 0);
+	ASSERT(s > 0);
+	for (g = n / 2; g > 0; g /= 2) {
+		for (i = g; i < n; i++) {
+			for (j = i - g; j >= 0 &&
+			    (*f)(v + j * s, v + (j + g) * s) == 1;
+			    j -= g) {
+				p1 = (void *)(v + j * s);
+				p2 = (void *)(v + (j + g) * s);
+				for (ii = 0; ii < s / 4; ii++) {
+					tmp = *p1;
+					*p1++ = *p2;
+					*p2++ = tmp;
+				}
+			}
+		}
+	}
+}
+
+/*
+ * Compare two acls, all fields.  Returns:
+ * -1 (less than)
+ *  0 (equal)
+ * +1 (greater than)
+ */
+int
+cmp2acls(void *a, void *b)
+{
+	aclent_t *x = (aclent_t *)a;
+	aclent_t *y = (aclent_t *)b;
+
+	/* Compare types */
+	if (x->a_type < y->a_type)
+		return (-1);
+	if (x->a_type > y->a_type)
+		return (1);
+	/* Equal types; compare id's */
+	if (x->a_id < y->a_id)
+		return (-1);
+	if (x->a_id > y->a_id)
+		return (1);
+	/* Equal ids; compare perms */
+	if (x->a_perm < y->a_perm)
+		return (-1);
+	if (x->a_perm > y->a_perm)
+		return (1);
+	/* Totally equal */
+	return (0);
+}
+
+/*ARGSUSED*/
+static void *
+cacl_realloc(void *ptr, size_t size, size_t new_size)
+{
+#if defined(_KERNEL)
+	void *tmp;
+
+	tmp = kmem_alloc(new_size, KM_SLEEP);
+	(void) memcpy(tmp, ptr, (size < new_size) ? size : new_size);
+	kmem_free(ptr, size);
+	return (tmp);
+#else
+	return (realloc(ptr, new_size));
+#endif
+}
+
+static int
+cacl_malloc(void **ptr, size_t size)
+{
+#if defined(_KERNEL)
+	*ptr = kmem_zalloc(size, KM_SLEEP);
+	return (0);
+#else
+	*ptr = calloc(1, size);
+	if (*ptr == NULL)
+		return (errno);
+
+	return (0);
+#endif
+}
+
+/*ARGSUSED*/
+static void
+cacl_free(void *ptr, size_t size)
+{
+#if defined(_KERNEL)
+	kmem_free(ptr, size);
+#else
+	free(ptr);
+#endif
+}
+
+acl_t *
+acl_alloc(enum acl_type type)
+{
+	acl_t *aclp;
+
+	if (cacl_malloc((void **)&aclp, sizeof (acl_t)) != 0)
+		return (NULL);
+
+	aclp->acl_aclp = NULL;
+	aclp->acl_cnt = 0;
+
+	switch (type) {
+	case ACE_T:
+		aclp->acl_type = ACE_T;
+		aclp->acl_entry_size = sizeof (ace_t);
+		break;
+	case ACLENT_T:
+		aclp->acl_type = ACLENT_T;
+		aclp->acl_entry_size = sizeof (aclent_t);
+		break;
+	default:
+		acl_free(aclp);
+		aclp = NULL;
+	}
+	return (aclp);
+}
+
+/*
+ * Free acl_t structure
+ */
+void
+acl_free(acl_t *aclp)
+{
+	int acl_size;
+
+	if (aclp == NULL)
+		return;
+
+	if (aclp->acl_aclp) {
+		acl_size = aclp->acl_cnt * aclp->acl_entry_size;
+		cacl_free(aclp->acl_aclp, acl_size);
+	}
+
+	cacl_free(aclp, sizeof (acl_t));
+}
+
+static uint32_t
+access_mask_set(int haswriteperm, int hasreadperm, int isowner, int isallow)
+{
+	uint32_t access_mask = 0;
+	int acl_produce;
+	int synchronize_set = 0, write_owner_set = 0;
+	int delete_set = 0, write_attrs_set = 0;
+	int read_named_set = 0, write_named_set = 0;
+
+	acl_produce = (ACL_SYNCHRONIZE_SET_ALLOW |
+	    ACL_WRITE_ATTRS_OWNER_SET_ALLOW |
+	    ACL_WRITE_ATTRS_WRITER_SET_DENY);
+
+	if (isallow) {
+		synchronize_set = ACL_SYNCHRONIZE_SET_ALLOW;
+		write_owner_set = ACL_WRITE_OWNER_SET_ALLOW;
+		delete_set = ACL_DELETE_SET_ALLOW;
+		if (hasreadperm)
+			read_named_set = ACL_READ_NAMED_READER_SET_ALLOW;
+		if (haswriteperm)
+			write_named_set = ACL_WRITE_NAMED_WRITER_SET_ALLOW;
+		if (isowner)
+			write_attrs_set = ACL_WRITE_ATTRS_OWNER_SET_ALLOW;
+		else if (haswriteperm)
+			write_attrs_set = ACL_WRITE_ATTRS_WRITER_SET_ALLOW;
+	} else {
+
+		synchronize_set = ACL_SYNCHRONIZE_SET_DENY;
+		write_owner_set = ACL_WRITE_OWNER_SET_DENY;
+		delete_set = ACL_DELETE_SET_DENY;
+		if (hasreadperm)
+			read_named_set = ACL_READ_NAMED_READER_SET_DENY;
+		if (haswriteperm)
+			write_named_set = ACL_WRITE_NAMED_WRITER_SET_DENY;
+		if (isowner)
+			write_attrs_set = ACL_WRITE_ATTRS_OWNER_SET_DENY;
+		else if (haswriteperm)
+			write_attrs_set = ACL_WRITE_ATTRS_WRITER_SET_DENY;
+		else
+			/*
+			 * If the entity is not the owner and does not
+			 * have write permissions ACE_WRITE_ATTRIBUTES will
+			 * always go in the DENY ACE.
+			 */
+			access_mask |= ACE_WRITE_ATTRIBUTES;
+	}
+
+	if (acl_produce & synchronize_set)
+		access_mask |= ACE_SYNCHRONIZE;
+	if (acl_produce & write_owner_set)
+		access_mask |= ACE_WRITE_OWNER;
+	if (acl_produce & delete_set)
+		access_mask |= ACE_DELETE;
+	if (acl_produce & write_attrs_set)
+		access_mask |= ACE_WRITE_ATTRIBUTES;
+	if (acl_produce & read_named_set)
+		access_mask |= ACE_READ_NAMED_ATTRS;
+	if (acl_produce & write_named_set)
+		access_mask |= ACE_WRITE_NAMED_ATTRS;
+
+	return (access_mask);
+}
+
+/*
+ * Given an mode_t, convert it into an access_mask as used
+ * by nfsace, assuming aclent_t -> nfsace semantics.
+ */
+static uint32_t
+mode_to_ace_access(mode_t mode, int isdir, int isowner, int isallow)
+{
+	uint32_t access = 0;
+	int haswriteperm = 0;
+	int hasreadperm = 0;
+
+	if (isallow) {
+		haswriteperm = (mode & S_IWOTH);
+		hasreadperm = (mode & S_IROTH);
+	} else {
+		haswriteperm = !(mode & S_IWOTH);
+		hasreadperm = !(mode & S_IROTH);
+	}
+
+	/*
+	 * The following call takes care of correctly setting the following
+	 * mask bits in the access_mask:
+	 * ACE_SYNCHRONIZE, ACE_WRITE_OWNER, ACE_DELETE,
+	 * ACE_WRITE_ATTRIBUTES, ACE_WRITE_NAMED_ATTRS, ACE_READ_NAMED_ATTRS
+	 */
+	access = access_mask_set(haswriteperm, hasreadperm, isowner, isallow);
+
+	if (isallow) {
+		access |= ACE_READ_ACL | ACE_READ_ATTRIBUTES;
+		if (isowner)
+			access |= ACE_WRITE_ACL;
+	} else {
+		if (! isowner)
+			access |= ACE_WRITE_ACL;
+	}
+
+	/* read */
+	if (mode & S_IROTH) {
+		access |= ACE_READ_DATA;
+	}
+	/* write */
+	if (mode & S_IWOTH) {
+		access |= ACE_WRITE_DATA |
+		    ACE_APPEND_DATA;
+		if (isdir)
+			access |= ACE_DELETE_CHILD;
+	}
+	/* exec */
+	if (mode & 01) {
+		access |= ACE_EXECUTE;
+	}
+
+	return (access);
+}
+
+/*
+ * Given an nfsace (presumably an ALLOW entry), make a
+ * corresponding DENY entry at the address given.
+ */
+static void
+ace_make_deny(ace_t *allow, ace_t *deny, int isdir, int isowner)
+{
+	(void) memcpy(deny, allow, sizeof (ace_t));
+
+	deny->a_who = allow->a_who;
+
+	deny->a_type = ACE_ACCESS_DENIED_ACE_TYPE;
+	deny->a_access_mask ^= ACE_POSIX_SUPPORTED_BITS;
+	if (isdir)
+		deny->a_access_mask ^= ACE_DELETE_CHILD;
+
+	deny->a_access_mask &= ~(ACE_SYNCHRONIZE | ACE_WRITE_OWNER |
+	    ACE_DELETE | ACE_WRITE_ATTRIBUTES | ACE_READ_NAMED_ATTRS |
+	    ACE_WRITE_NAMED_ATTRS);
+	deny->a_access_mask |= access_mask_set((allow->a_access_mask &
+	    ACE_WRITE_DATA), (allow->a_access_mask & ACE_READ_DATA), isowner,
+	    B_FALSE);
+}
+/*
+ * Make an initial pass over an array of aclent_t's.  Gather
+ * information such as an ACL_MASK (if any), number of users,
+ * number of groups, and whether the array needs to be sorted.
+ */
+static int
+ln_aent_preprocess(aclent_t *aclent, int n,
+    int *hasmask, mode_t *mask,
+    int *numuser, int *numgroup, int *needsort)
+{
+	int error = 0;
+	int i;
+	int curtype = 0;
+
+	*hasmask = 0;
+	*mask = 07;
+	*needsort = 0;
+	*numuser = 0;
+	*numgroup = 0;
+
+	for (i = 0; i < n; i++) {
+		if (aclent[i].a_type < curtype)
+			*needsort = 1;
+		else if (aclent[i].a_type > curtype)
+			curtype = aclent[i].a_type;
+		if (aclent[i].a_type & USER)
+			(*numuser)++;
+		if (aclent[i].a_type & (GROUP | GROUP_OBJ))
+			(*numgroup)++;
+		if (aclent[i].a_type & CLASS_OBJ) {
+			if (*hasmask) {
+				error = EINVAL;
+				goto out;
+			} else {
+				*hasmask = 1;
+				*mask = aclent[i].a_perm;
+			}
+		}
+	}
+
+	if ((! *hasmask) && (*numuser + *numgroup > 1)) {
+		error = EINVAL;
+		goto out;
+	}
+
+out:
+	return (error);
+}
+
+/*
+ * Convert an array of aclent_t into an array of nfsace entries,
+ * following POSIX draft -> nfsv4 conversion semantics as outlined in
+ * the IETF draft.
+ */
+static int
+ln_aent_to_ace(aclent_t *aclent, int n, ace_t **acepp, int *rescount, int isdir)
+{
+	int error = 0;
+	mode_t mask;
+	int numuser, numgroup, needsort;
+	int resultsize = 0;
+	int i, groupi = 0, skip;
+	ace_t *acep, *result = NULL;
+	int hasmask;
+
+	error = ln_aent_preprocess(aclent, n, &hasmask, &mask,
+	    &numuser, &numgroup, &needsort);
+	if (error != 0)
+		goto out;
+
+	/* allow + deny for each aclent */
+	resultsize = n * 2;
+	if (hasmask) {
+		/*
+		 * stick extra deny on the group_obj and on each
+		 * user|group for the mask (the group_obj was added
+		 * into the count for numgroup)
+		 */
+		resultsize += numuser + numgroup;
+		/* ... and don't count the mask itself */
+		resultsize -= 2;
+	}
+
+	/* sort the source if necessary */
+	if (needsort)
+		ksort((caddr_t)aclent, n, sizeof (aclent_t), cmp2acls);
+
+	if (cacl_malloc((void **)&result, resultsize * sizeof (ace_t)) != 0)
+		goto out;
+
+	acep = result;
+
+	for (i = 0; i < n; i++) {
+		/*
+		 * don't process CLASS_OBJ (mask); mask was grabbed in
+		 * ln_aent_preprocess()
+		 */
+		if (aclent[i].a_type & CLASS_OBJ)
+			continue;
+
+		/* If we need an ACL_MASK emulator, prepend it now */
+		if ((hasmask) &&
+		    (aclent[i].a_type & (USER | GROUP | GROUP_OBJ))) {
+			acep->a_type = ACE_ACCESS_DENIED_ACE_TYPE;
+			acep->a_flags = 0;
+			if (aclent[i].a_type & GROUP_OBJ) {
+				acep->a_who = (uid_t)-1;
+				acep->a_flags |=
+				    (ACE_IDENTIFIER_GROUP|ACE_GROUP);
+			} else if (aclent[i].a_type & USER) {
+				acep->a_who = aclent[i].a_id;
+			} else {
+				acep->a_who = aclent[i].a_id;
+				acep->a_flags |= ACE_IDENTIFIER_GROUP;
+			}
+			if (aclent[i].a_type & ACL_DEFAULT) {
+				acep->a_flags |= ACE_INHERIT_ONLY_ACE |
+				    ACE_FILE_INHERIT_ACE |
+				    ACE_DIRECTORY_INHERIT_ACE;
+			}
+			/*
+			 * Set the access mask for the prepended deny
+			 * ace.  To do this, we invert the mask (found
+			 * in ln_aent_preprocess()) then convert it to an
+			 * DENY ace access_mask.
+			 */
+			acep->a_access_mask = mode_to_ace_access((mask ^ 07),
+			    isdir, 0, 0);
+			acep += 1;
+		}
+
+		/* handle a_perm -> access_mask */
+		acep->a_access_mask = mode_to_ace_access(aclent[i].a_perm,
+		    isdir, aclent[i].a_type & USER_OBJ, 1);
+
+		/* emulate a default aclent */
+		if (aclent[i].a_type & ACL_DEFAULT) {
+			acep->a_flags |= ACE_INHERIT_ONLY_ACE |
+			    ACE_FILE_INHERIT_ACE |
+			    ACE_DIRECTORY_INHERIT_ACE;
+		}
+
+		/*
+		 * handle a_perm and a_id
+		 *
+		 * this must be done last, since it involves the
+		 * corresponding deny aces, which are handled
+		 * differently for each different a_type.
+		 */
+		if (aclent[i].a_type & USER_OBJ) {
+			acep->a_who = (uid_t)-1;
+			acep->a_flags |= ACE_OWNER;
+			ace_make_deny(acep, acep + 1, isdir, B_TRUE);
+			acep += 2;
+		} else if (aclent[i].a_type & USER) {
+			acep->a_who = aclent[i].a_id;
+			ace_make_deny(acep, acep + 1, isdir, B_FALSE);
+			acep += 2;
+		} else if (aclent[i].a_type & (GROUP_OBJ | GROUP)) {
+			if (aclent[i].a_type & GROUP_OBJ) {
+				acep->a_who = (uid_t)-1;
+				acep->a_flags |= ACE_GROUP;
+			} else {
+				acep->a_who = aclent[i].a_id;
+			}
+			acep->a_flags |= ACE_IDENTIFIER_GROUP;
+			/*
+			 * Set the corresponding deny for the group ace.
+			 *
+			 * The deny aces go after all of the groups, unlike
+			 * everything else, where they immediately follow
+			 * the allow ace.
+			 *
+			 * We calculate "skip", the number of slots to
+			 * skip ahead for the deny ace, here.
+			 *
+			 * The pattern is:
+			 * MD1 A1 MD2 A2 MD3 A3 D1 D2 D3
+			 * thus, skip is
+			 * (2 * numgroup) - 1 - groupi
+			 * (2 * numgroup) to account for MD + A
+			 * - 1 to account for the fact that we're on the
+			 * access (A), not the mask (MD)
+			 * - groupi to account for the fact that we have
+			 * passed up groupi number of MD's.
+			 */
+			skip = (2 * numgroup) - 1 - groupi;
+			ace_make_deny(acep, acep + skip, isdir, B_FALSE);
+			/*
+			 * If we just did the last group, skip acep past
+			 * all of the denies; else, just move ahead one.
+			 */
+			if (++groupi >= numgroup)
+				acep += numgroup + 1;
+			else
+				acep += 1;
+		} else if (aclent[i].a_type & OTHER_OBJ) {
+			acep->a_who = (uid_t)-1;
+			acep->a_flags |= ACE_EVERYONE;
+			ace_make_deny(acep, acep + 1, isdir, B_FALSE);
+			acep += 2;
+		} else {
+			error = EINVAL;
+			goto out;
+		}
+	}
+
+	*acepp = result;
+	*rescount = resultsize;
+
+out:
+	if (error != 0) {
+		if ((result != NULL) && (resultsize > 0)) {
+			cacl_free(result, resultsize * sizeof (ace_t));
+		}
+	}
+
+	return (error);
+}
+
+static int
+convert_aent_to_ace(aclent_t *aclentp, int aclcnt, int isdir,
+    ace_t **retacep, int *retacecnt)
+{
+	ace_t *acep;
+	ace_t *dfacep;
+	int acecnt = 0;
+	int dfacecnt = 0;
+	int dfaclstart = 0;
+	int dfaclcnt = 0;
+	aclent_t *aclp;
+	int i;
+	int error;
+	int acesz, dfacesz;
+
+	ksort((caddr_t)aclentp, aclcnt, sizeof (aclent_t), cmp2acls);
+
+	for (i = 0, aclp = aclentp; i < aclcnt; aclp++, i++) {
+		if (aclp->a_type & ACL_DEFAULT)
+			break;
+	}
+
+	if (i < aclcnt) {
+		dfaclstart = i;
+		dfaclcnt = aclcnt - i;
+	}
+
+	if (dfaclcnt && isdir == 0) {
+		return (EINVAL);
+	}
+
+	error = ln_aent_to_ace(aclentp, i,  &acep, &acecnt, isdir);
+	if (error)
+		return (error);
+
+	if (dfaclcnt) {
+		error = ln_aent_to_ace(&aclentp[dfaclstart], dfaclcnt,
+		    &dfacep, &dfacecnt, isdir);
+		if (error) {
+			if (acep) {
+				cacl_free(acep, acecnt * sizeof (ace_t));
+			}
+			return (error);
+		}
+	}
+
+	if (dfacecnt != 0) {
+		acesz = sizeof (ace_t) * acecnt;
+		dfacesz = sizeof (ace_t) * dfacecnt;
+		acep = cacl_realloc(acep, acesz, acesz + dfacesz);
+		if (acep == NULL)
+			return (ENOMEM);
+		if (dfaclcnt) {
+			(void) memcpy(acep + acecnt, dfacep, dfacesz);
+		}
+	}
+	if (dfaclcnt)
+		cacl_free(dfacep, dfacecnt * sizeof (ace_t));
+
+	*retacecnt = acecnt + dfacecnt;
+	*retacep = acep;
+	return (0);
+}
+
+static int
+ace_mask_to_mode(uint32_t  mask, o_mode_t *modep, int isdir)
+{
+	int error = 0;
+	o_mode_t mode = 0;
+	uint32_t bits, wantbits;
+
+	/* read */
+	if (mask & ACE_READ_DATA)
+		mode |= S_IROTH;
+
+	/* write */
+	wantbits = (ACE_WRITE_DATA | ACE_APPEND_DATA);
+	if (isdir)
+		wantbits |= ACE_DELETE_CHILD;
+	bits = mask & wantbits;
+	if (bits != 0) {
+		if (bits != wantbits) {
+			error = ENOTSUP;
+			goto out;
+		}
+		mode |= S_IWOTH;
+	}
+
+	/* exec */
+	if (mask & ACE_EXECUTE) {
+		mode |= S_IXOTH;
+	}
+
+	*modep = mode;
+
+out:
+	return (error);
+}
+
+static void
+acevals_init(acevals_t *vals, uid_t key)
+{
+	bzero(vals, sizeof (*vals));
+	vals->allowed = ACE_MASK_UNDEFINED;
+	vals->denied = ACE_MASK_UNDEFINED;
+	vals->mask = ACE_MASK_UNDEFINED;
+	vals->key = key;
+}
+
+static void
+ace_list_init(ace_list_t *al, int dfacl_flag)
+{
+	acevals_init(&al->user_obj, NULL);
+	acevals_init(&al->group_obj, NULL);
+	acevals_init(&al->other_obj, NULL);
+	al->numusers = 0;
+	al->numgroups = 0;
+	al->acl_mask = 0;
+	al->hasmask = 0;
+	al->state = ace_unused;
+	al->seen = 0;
+	al->dfacl_flag = dfacl_flag;
+}
+
+/*
+ * Find or create an acevals holder for a given id and avl tree.
+ *
+ * Note that only one thread will ever touch these avl trees, so
+ * there is no need for locking.
+ */
+static acevals_t *
+acevals_find(ace_t *ace, avl_tree_t *avl, int *num)
+{
+	acevals_t key, *rc;
+	avl_index_t where;
+
+	key.key = ace->a_who;
+	rc = avl_find(avl, &key, &where);
+	if (rc != NULL)
+		return (rc);
+
+	/* this memory is freed by ln_ace_to_aent()->ace_list_free() */
+	if (cacl_malloc((void **)&rc, sizeof (acevals_t)) != 0)
+		return (NULL);
+
+	acevals_init(rc, ace->a_who);
+	avl_insert(avl, rc, where);
+	(*num)++;
+
+	return (rc);
+}
+
+static int
+access_mask_check(ace_t *acep, int mask_bit, int isowner)
+{
+	int set_deny, err_deny;
+	int set_allow, err_allow;
+	int acl_consume;
+	int haswriteperm, hasreadperm;
+
+	if (acep->a_type == ACE_ACCESS_DENIED_ACE_TYPE) {
+		haswriteperm = (acep->a_access_mask & ACE_WRITE_DATA) ? 0 : 1;
+		hasreadperm = (acep->a_access_mask & ACE_READ_DATA) ? 0 : 1;
+	} else {
+		haswriteperm = (acep->a_access_mask & ACE_WRITE_DATA) ? 1 : 0;
+		hasreadperm = (acep->a_access_mask & ACE_READ_DATA) ? 1 : 0;
+	}
+
+	acl_consume = (ACL_SYNCHRONIZE_ERR_DENY |
+	    ACL_DELETE_ERR_DENY |
+	    ACL_WRITE_OWNER_ERR_DENY |
+	    ACL_WRITE_OWNER_ERR_ALLOW |
+	    ACL_WRITE_ATTRS_OWNER_SET_ALLOW |
+	    ACL_WRITE_ATTRS_OWNER_ERR_DENY |
+	    ACL_WRITE_ATTRS_WRITER_SET_DENY |
+	    ACL_WRITE_ATTRS_WRITER_ERR_ALLOW |
+	    ACL_WRITE_NAMED_WRITER_ERR_DENY |
+	    ACL_READ_NAMED_READER_ERR_DENY);
+
+	if (mask_bit == ACE_SYNCHRONIZE) {
+		set_deny = ACL_SYNCHRONIZE_SET_DENY;
+		err_deny =  ACL_SYNCHRONIZE_ERR_DENY;
+		set_allow = ACL_SYNCHRONIZE_SET_ALLOW;
+		err_allow = ACL_SYNCHRONIZE_ERR_ALLOW;
+	} else if (mask_bit == ACE_WRITE_OWNER) {
+		set_deny = ACL_WRITE_OWNER_SET_DENY;
+		err_deny =  ACL_WRITE_OWNER_ERR_DENY;
+		set_allow = ACL_WRITE_OWNER_SET_ALLOW;
+		err_allow = ACL_WRITE_OWNER_ERR_ALLOW;
+	} else if (mask_bit == ACE_DELETE) {
+		set_deny = ACL_DELETE_SET_DENY;
+		err_deny =  ACL_DELETE_ERR_DENY;
+		set_allow = ACL_DELETE_SET_ALLOW;
+		err_allow = ACL_DELETE_ERR_ALLOW;
+	} else if (mask_bit == ACE_WRITE_ATTRIBUTES) {
+		if (isowner) {
+			set_deny = ACL_WRITE_ATTRS_OWNER_SET_DENY;
+			err_deny =  ACL_WRITE_ATTRS_OWNER_ERR_DENY;
+			set_allow = ACL_WRITE_ATTRS_OWNER_SET_ALLOW;
+			err_allow = ACL_WRITE_ATTRS_OWNER_ERR_ALLOW;
+		} else if (haswriteperm) {
+			set_deny = ACL_WRITE_ATTRS_WRITER_SET_DENY;
+			err_deny =  ACL_WRITE_ATTRS_WRITER_ERR_DENY;
+			set_allow = ACL_WRITE_ATTRS_WRITER_SET_ALLOW;
+			err_allow = ACL_WRITE_ATTRS_WRITER_ERR_ALLOW;
+		} else {
+			if ((acep->a_access_mask & mask_bit) &&
+			    (acep->a_type & ACE_ACCESS_ALLOWED_ACE_TYPE)) {
+				return (ENOTSUP);
+			}
+			return (0);
+		}
+	} else if (mask_bit == ACE_READ_NAMED_ATTRS) {
+		if (!hasreadperm)
+			return (0);
+
+		set_deny = ACL_READ_NAMED_READER_SET_DENY;
+		err_deny = ACL_READ_NAMED_READER_ERR_DENY;
+		set_allow = ACL_READ_NAMED_READER_SET_ALLOW;
+		err_allow = ACL_READ_NAMED_READER_ERR_ALLOW;
+	} else if (mask_bit == ACE_WRITE_NAMED_ATTRS) {
+		if (!haswriteperm)
+			return (0);
+
+		set_deny = ACL_WRITE_NAMED_WRITER_SET_DENY;
+		err_deny = ACL_WRITE_NAMED_WRITER_ERR_DENY;
+		set_allow = ACL_WRITE_NAMED_WRITER_SET_ALLOW;
+		err_allow = ACL_WRITE_NAMED_WRITER_ERR_ALLOW;
+	} else {
+		return (EINVAL);
+	}
+
+	if (acep->a_type == ACE_ACCESS_DENIED_ACE_TYPE) {
+		if (acl_consume & set_deny) {
+			if (!(acep->a_access_mask & mask_bit)) {
+				return (ENOTSUP);
+			}
+		} else if (acl_consume & err_deny) {
+			if (acep->a_access_mask & mask_bit) {
+				return (ENOTSUP);
+			}
+		}
+	} else {
+		/* ACE_ACCESS_ALLOWED_ACE_TYPE */
+		if (acl_consume & set_allow) {
+			if (!(acep->a_access_mask & mask_bit)) {
+				return (ENOTSUP);
+			}
+		} else if (acl_consume & err_allow) {
+			if (acep->a_access_mask & mask_bit) {
+				return (ENOTSUP);
+			}
+		}
+	}
+	return (0);
+}
+
+static int
+ace_to_aent_legal(ace_t *acep)
+{
+	int error = 0;
+	int isowner;
+
+	/* only ALLOW or DENY */
+	if ((acep->a_type != ACE_ACCESS_ALLOWED_ACE_TYPE) &&
+	    (acep->a_type != ACE_ACCESS_DENIED_ACE_TYPE)) {
+		error = ENOTSUP;
+		goto out;
+	}
+
+	/* check for invalid flags */
+	if (acep->a_flags & ~(ACE_VALID_FLAG_BITS)) {
+		error = EINVAL;
+		goto out;
+	}
+
+	/* some flags are illegal */
+	if (acep->a_flags & (ACE_SUCCESSFUL_ACCESS_ACE_FLAG |
+	    ACE_FAILED_ACCESS_ACE_FLAG |
+	    ACE_NO_PROPAGATE_INHERIT_ACE)) {
+		error = ENOTSUP;
+		goto out;
+	}
+
+	/* check for invalid masks */
+	if (acep->a_access_mask & ~(ACE_VALID_MASK_BITS)) {
+		error = EINVAL;
+		goto out;
+	}
+
+	if ((acep->a_flags & ACE_OWNER)) {
+		isowner = 1;
+	} else {
+		isowner = 0;
+	}
+
+	error = access_mask_check(acep, ACE_SYNCHRONIZE, isowner);
+	if (error)
+		goto out;
+
+	error = access_mask_check(acep, ACE_WRITE_OWNER, isowner);
+	if (error)
+		goto out;
+
+	error = access_mask_check(acep, ACE_DELETE, isowner);
+	if (error)
+		goto out;
+
+	error = access_mask_check(acep, ACE_WRITE_ATTRIBUTES, isowner);
+	if (error)
+		goto out;
+
+	error = access_mask_check(acep, ACE_READ_NAMED_ATTRS, isowner);
+	if (error)
+		goto out;
+
+	error = access_mask_check(acep, ACE_WRITE_NAMED_ATTRS, isowner);
+	if (error)
+		goto out;
+
+	/* more detailed checking of masks */
+	if (acep->a_type == ACE_ACCESS_ALLOWED_ACE_TYPE) {
+		if (! (acep->a_access_mask & ACE_READ_ATTRIBUTES)) {
+			error = ENOTSUP;
+			goto out;
+		}
+		if ((acep->a_access_mask & ACE_WRITE_DATA) &&
+		    (! (acep->a_access_mask & ACE_APPEND_DATA))) {
+			error = ENOTSUP;
+			goto out;
+		}
+		if ((! (acep->a_access_mask & ACE_WRITE_DATA)) &&
+		    (acep->a_access_mask & ACE_APPEND_DATA)) {
+			error = ENOTSUP;
+			goto out;
+		}
+	}
+
+	/* ACL enforcement */
+	if ((acep->a_access_mask & ACE_READ_ACL) &&
+	    (acep->a_type != ACE_ACCESS_ALLOWED_ACE_TYPE)) {
+		error = ENOTSUP;
+		goto out;
+	}
+	if (acep->a_access_mask & ACE_WRITE_ACL) {
+		if ((acep->a_type == ACE_ACCESS_DENIED_ACE_TYPE) &&
+		    (isowner)) {
+			error = ENOTSUP;
+			goto out;
+		}
+		if ((acep->a_type == ACE_ACCESS_ALLOWED_ACE_TYPE) &&
+		    (! isowner)) {
+			error = ENOTSUP;
+			goto out;
+		}
+	}
+
+out:
+	return (error);
+}
+
+static int
+ace_allow_to_mode(uint32_t mask, o_mode_t *modep, int isdir)
+{
+	/* ACE_READ_ACL and ACE_READ_ATTRIBUTES must both be set */
+	if ((mask & (ACE_READ_ACL | ACE_READ_ATTRIBUTES)) !=
+	    (ACE_READ_ACL | ACE_READ_ATTRIBUTES)) {
+		return (ENOTSUP);
+	}
+
+	return (ace_mask_to_mode(mask, modep, isdir));
+}
+
+static int
+acevals_to_aent(acevals_t *vals, aclent_t *dest, ace_list_t *list,
+    uid_t owner, gid_t group, int isdir)
+{
+	int error;
+	uint32_t  flips = ACE_POSIX_SUPPORTED_BITS;
+
+	if (isdir)
+		flips |= ACE_DELETE_CHILD;
+	if (vals->allowed != (vals->denied ^ flips)) {
+		error = ENOTSUP;
+		goto out;
+	}
+	if ((list->hasmask) && (list->acl_mask != vals->mask) &&
+	    (vals->aent_type & (USER | GROUP | GROUP_OBJ))) {
+		error = ENOTSUP;
+		goto out;
+	}
+	error = ace_allow_to_mode(vals->allowed, &dest->a_perm, isdir);
+	if (error != 0)
+		goto out;
+	dest->a_type = vals->aent_type;
+	if (dest->a_type & (USER | GROUP)) {
+		dest->a_id = vals->key;
+	} else if (dest->a_type & USER_OBJ) {
+		dest->a_id = owner;
+	} else if (dest->a_type & GROUP_OBJ) {
+		dest->a_id = group;
+	} else if (dest->a_type & OTHER_OBJ) {
+		dest->a_id = 0;
+	} else {
+		error = EINVAL;
+		goto out;
+	}
+
+out:
+	return (error);
+}
+
+
+static int
+ace_list_to_aent(ace_list_t *list, aclent_t **aclentp, int *aclcnt,
+    uid_t owner, gid_t group, int isdir)
+{
+	int error = 0;
+	aclent_t *aent, *result = NULL;
+	acevals_t *vals;
+	int resultcount;
+
+	if ((list->seen & (USER_OBJ | GROUP_OBJ | OTHER_OBJ)) !=
+	    (USER_OBJ | GROUP_OBJ | OTHER_OBJ)) {
+		error = ENOTSUP;
+		goto out;
+	}
+	if ((! list->hasmask) && (list->numusers + list->numgroups > 0)) {
+		error = ENOTSUP;
+		goto out;
+	}
+
+	resultcount = 3 + list->numusers + list->numgroups;
+	/*
+	 * This must be the same condition as below, when we add the CLASS_OBJ
+	 * (aka ACL mask)
+	 */
+	if ((list->hasmask) || (! list->dfacl_flag))
+		resultcount += 1;
+
+	if (cacl_malloc((void **)&result,
+	    resultcount * sizeof (aclent_t)) != 0) {
+		error = ENOMEM;
+		goto out;
+	}
+	aent = result;
+
+	/* USER_OBJ */
+	if (!(list->user_obj.aent_type & USER_OBJ)) {
+		error = EINVAL;
+		goto out;
+	}
+
+	error = acevals_to_aent(&list->user_obj, aent, list, owner, group,
+	    isdir);
+
+	if (error != 0)
+		goto out;
+	++aent;
+	/* USER */
+	vals = NULL;
+	for (vals = avl_first(&list->user); vals != NULL;
+	    vals = AVL_NEXT(&list->user, vals)) {
+		if (!(vals->aent_type & USER)) {
+			error = EINVAL;
+			goto out;
+		}
+		error = acevals_to_aent(vals, aent, list, owner, group,
+		    isdir);
+		if (error != 0)
+			goto out;
+		++aent;
+	}
+	/* GROUP_OBJ */
+	if (!(list->group_obj.aent_type & GROUP_OBJ)) {
+		error = EINVAL;
+		goto out;
+	}
+	error = acevals_to_aent(&list->group_obj, aent, list, owner, group,
+	    isdir);
+	if (error != 0)
+		goto out;
+	++aent;
+	/* GROUP */
+	vals = NULL;
+	for (vals = avl_first(&list->group); vals != NULL;
+	    vals = AVL_NEXT(&list->group, vals)) {
+		if (!(vals->aent_type & GROUP)) {
+			error = EINVAL;
+			goto out;
+		}
+		error = acevals_to_aent(vals, aent, list, owner, group,
+		    isdir);
+		if (error != 0)
+			goto out;
+		++aent;
+	}
+	/*
+	 * CLASS_OBJ (aka ACL_MASK)
+	 *
+	 * An ACL_MASK is not fabricated if the ACL is a default ACL.
+	 * This is to follow UFS's behavior.
+	 */
+	if ((list->hasmask) || (! list->dfacl_flag)) {
+		if (list->hasmask) {
+			uint32_t flips = ACE_POSIX_SUPPORTED_BITS;
+			if (isdir)
+				flips |= ACE_DELETE_CHILD;
+			error = ace_mask_to_mode(list->acl_mask ^ flips,
+			    &aent->a_perm, isdir);
+			if (error != 0)
+				goto out;
+		} else {
+			/* fabricate the ACL_MASK from the group permissions */
+			error = ace_mask_to_mode(list->group_obj.allowed,
+			    &aent->a_perm, isdir);
+			if (error != 0)
+				goto out;
+		}
+		aent->a_id = 0;
+		aent->a_type = CLASS_OBJ | list->dfacl_flag;
+		++aent;
+	}
+	/* OTHER_OBJ */
+	if (!(list->other_obj.aent_type & OTHER_OBJ)) {
+		error = EINVAL;
+		goto out;
+	}
+	error = acevals_to_aent(&list->other_obj, aent, list, owner, group,
+	    isdir);
+	if (error != 0)
+		goto out;
+	++aent;
+
+	*aclentp = result;
+	*aclcnt = resultcount;
+
+out:
+	if (error != 0) {
+		if (result != NULL)
+			cacl_free(result, resultcount * sizeof (aclent_t));
+	}
+
+	return (error);
+}
+
+
+/*
+ * free all data associated with an ace_list
+ */
+static void
+ace_list_free(ace_list_t *al)
+{
+	acevals_t *node;
+	void *cookie;
+
+	if (al == NULL)
+		return;
+
+	cookie = NULL;
+	while ((node = avl_destroy_nodes(&al->user, &cookie)) != NULL)
+		cacl_free(node, sizeof (acevals_t));
+	cookie = NULL;
+	while ((node = avl_destroy_nodes(&al->group, &cookie)) != NULL)
+		cacl_free(node, sizeof (acevals_t));
+
+	avl_destroy(&al->user);
+	avl_destroy(&al->group);
+
+	/* free the container itself */
+	cacl_free(al, sizeof (ace_list_t));
+}
+
+static int
+acevals_compare(const void *va, const void *vb)
+{
+	const acevals_t *a = va, *b = vb;
+
+	if (a->key == b->key)
+		return (0);
+
+	if (a->key > b->key)
+		return (1);
+
+	else
+		return (-1);
+}
+
+/*
+ * Convert a list of ace_t entries to equivalent regular and default
+ * aclent_t lists.  Return error (ENOTSUP) when conversion is not possible.
+ */
+static int
+ln_ace_to_aent(ace_t *ace, int n, uid_t owner, gid_t group,
+    aclent_t **aclentp, int *aclcnt, aclent_t **dfaclentp, int *dfaclcnt,
+    int isdir)
+{
+	int error = 0;
+	ace_t *acep;
+	uint32_t bits;
+	int i;
+	ace_list_t *normacl = NULL, *dfacl = NULL, *acl;
+	acevals_t *vals;
+
+	*aclentp = NULL;
+	*aclcnt = 0;
+	*dfaclentp = NULL;
+	*dfaclcnt = 0;
+
+	/* we need at least user_obj, group_obj, and other_obj */
+	if (n < 6) {
+		error = ENOTSUP;
+		goto out;
+	}
+	if (ace == NULL) {
+		error = EINVAL;
+		goto out;
+	}
+
+	error = cacl_malloc((void **)&normacl, sizeof (ace_list_t));
+	if (error != 0)
+		goto out;
+
+	avl_create(&normacl->user, acevals_compare, sizeof (acevals_t),
+	    offsetof(acevals_t, avl));
+	avl_create(&normacl->group, acevals_compare, sizeof (acevals_t),
+	    offsetof(acevals_t, avl));
+
+	ace_list_init(normacl, 0);
+
+	error = cacl_malloc((void **)&dfacl, sizeof (ace_list_t));
+	if (error != 0)
+		goto out;
+
+	avl_create(&dfacl->user, acevals_compare, sizeof (acevals_t),
+	    offsetof(acevals_t, avl));
+	avl_create(&dfacl->group, acevals_compare, sizeof (acevals_t),
+	    offsetof(acevals_t, avl));
+	ace_list_init(dfacl, ACL_DEFAULT);
+
+	/* process every ace_t... */
+	for (i = 0; i < n; i++) {
+		acep = &ace[i];
+
+		/* rule out certain cases quickly */
+		error = ace_to_aent_legal(acep);
+		if (error != 0)
+			goto out;
+
+		/*
+		 * Turn off these bits in order to not have to worry about
+		 * them when doing the checks for compliments.
+		 */
+		acep->a_access_mask &= ~(ACE_WRITE_OWNER | ACE_DELETE |
+		    ACE_SYNCHRONIZE | ACE_WRITE_ATTRIBUTES |
+		    ACE_READ_NAMED_ATTRS | ACE_WRITE_NAMED_ATTRS);
+
+		/* see if this should be a regular or default acl */
+		bits = acep->a_flags &
+		    (ACE_INHERIT_ONLY_ACE |
+		    ACE_FILE_INHERIT_ACE |
+		    ACE_DIRECTORY_INHERIT_ACE);
+		if (bits != 0) {
+			/* all or nothing on these inherit bits */
+			if (bits != (ACE_INHERIT_ONLY_ACE |
+			    ACE_FILE_INHERIT_ACE |
+			    ACE_DIRECTORY_INHERIT_ACE)) {
+				error = ENOTSUP;
+				goto out;
+			}
+			acl = dfacl;
+		} else {
+			acl = normacl;
+		}
+
+		if ((acep->a_flags & ACE_OWNER)) {
+			if (acl->state > ace_user_obj) {
+				error = ENOTSUP;
+				goto out;
+			}
+			acl->state = ace_user_obj;
+			acl->seen |= USER_OBJ;
+			vals = &acl->user_obj;
+			vals->aent_type = USER_OBJ | acl->dfacl_flag;
+		} else if ((acep->a_flags & ACE_EVERYONE)) {
+			acl->state = ace_other_obj;
+			acl->seen |= OTHER_OBJ;
+			vals = &acl->other_obj;
+			vals->aent_type = OTHER_OBJ | acl->dfacl_flag;
+		} else if (acep->a_flags & ACE_IDENTIFIER_GROUP) {
+			if (acl->state > ace_group) {
+				error = ENOTSUP;
+				goto out;
+			}
+			if ((acep->a_flags & ACE_GROUP)) {
+				acl->seen |= GROUP_OBJ;
+				vals = &acl->group_obj;
+				vals->aent_type = GROUP_OBJ | acl->dfacl_flag;
+			} else {
+				acl->seen |= GROUP;
+				vals = acevals_find(acep, &acl->group,
+				    &acl->numgroups);
+				if (vals == NULL) {
+					error = ENOMEM;
+					goto out;
+				}
+				vals->aent_type = GROUP | acl->dfacl_flag;
+			}
+			acl->state = ace_group;
+		} else {
+			if (acl->state > ace_user) {
+				error = ENOTSUP;
+				goto out;
+			}
+			acl->state = ace_user;
+			acl->seen |= USER;
+			vals = acevals_find(acep, &acl->user,
+			    &acl->numusers);
+			if (vals == NULL) {
+				error = ENOMEM;
+				goto out;
+			}
+			vals->aent_type = USER | acl->dfacl_flag;
+		}
+
+		if (!(acl->state > ace_unused)) {
+			error = EINVAL;
+			goto out;
+		}
+
+		if (acep->a_type == ACE_ACCESS_ALLOWED_ACE_TYPE) {
+			/* no more than one allowed per aclent_t */
+			if (vals->allowed != ACE_MASK_UNDEFINED) {
+				error = ENOTSUP;
+				goto out;
+			}
+			vals->allowed = acep->a_access_mask;
+		} else {
+			/*
+			 * it's a DENY; if there was a previous DENY, it
+			 * must have been an ACL_MASK.
+			 */
+			if (vals->denied != ACE_MASK_UNDEFINED) {
+				/* ACL_MASK is for USER and GROUP only */
+				if ((acl->state != ace_user) &&
+				    (acl->state != ace_group)) {
+					error = ENOTSUP;
+					goto out;
+				}
+
+				if (! acl->hasmask) {
+					acl->hasmask = 1;
+					acl->acl_mask = vals->denied;
+				/* check for mismatched ACL_MASK emulations */
+				} else if (acl->acl_mask != vals->denied) {
+					error = ENOTSUP;
+					goto out;
+				}
+				vals->mask = vals->denied;
+			}
+			vals->denied = acep->a_access_mask;
+		}
+	}
+
+	/* done collating; produce the aclent_t lists */
+	if (normacl->state != ace_unused) {
+		error = ace_list_to_aent(normacl, aclentp, aclcnt,
+		    owner, group, isdir);
+		if (error != 0) {
+			goto out;
+		}
+	}
+	if (dfacl->state != ace_unused) {
+		error = ace_list_to_aent(dfacl, dfaclentp, dfaclcnt,
+		    owner, group, isdir);
+		if (error != 0) {
+			goto out;
+		}
+	}
+
+out:
+	if (normacl != NULL)
+		ace_list_free(normacl);
+	if (dfacl != NULL)
+		ace_list_free(dfacl);
+
+	return (error);
+}
+
+static int
+convert_ace_to_aent(ace_t *acebufp, int acecnt, int isdir,
+    uid_t owner, gid_t group, aclent_t **retaclentp, int *retaclcnt)
+{
+	int error = 0;
+	aclent_t *aclentp, *dfaclentp;
+	int aclcnt, dfaclcnt;
+	int aclsz, dfaclsz;
+
+	error = ln_ace_to_aent(acebufp, acecnt, owner, group,
+	    &aclentp, &aclcnt, &dfaclentp, &dfaclcnt, isdir);
+
+	if (error)
+		return (error);
+
+
+	if (dfaclcnt != 0) {
+		/*
+		 * Slap aclentp and dfaclentp into a single array.
+		 */
+		aclsz = sizeof (aclent_t) * aclcnt;
+		dfaclsz = sizeof (aclent_t) * dfaclcnt;
+		aclentp = cacl_realloc(aclentp, aclsz, aclsz + dfaclsz);
+		if (aclentp != NULL) {
+			(void) memcpy(aclentp + aclcnt, dfaclentp, dfaclsz);
+		} else {
+			error = ENOMEM;
+		}
+	}
+
+	if (aclentp) {
+		*retaclentp = aclentp;
+		*retaclcnt = aclcnt + dfaclcnt;
+	}
+
+	if (dfaclentp)
+		cacl_free(dfaclentp, dfaclsz);
+
+	return (error);
+}
+
+
+int
+acl_translate(acl_t *aclp, int target_flavor, int isdir, uid_t owner,
+    gid_t group)
+{
+	int aclcnt;
+	void *acldata;
+	int error;
+
+	/*
+	 * See if we need to translate
+	 */
+	if ((target_flavor == _ACL_ACE_ENABLED && aclp->acl_type == ACE_T) ||
+	    (target_flavor == _ACL_ACLENT_ENABLED &&
+	    aclp->acl_type == ACLENT_T))
+		return (0);
+
+	if (target_flavor == -1) {
+		error = EINVAL;
+		goto out;
+	}
+
+	if (target_flavor ==  _ACL_ACE_ENABLED &&
+	    aclp->acl_type == ACLENT_T) {
+		error = convert_aent_to_ace(aclp->acl_aclp,
+		    aclp->acl_cnt, isdir, (ace_t **)&acldata, &aclcnt);
+		if (error)
+			goto out;
+
+	} else if (target_flavor == _ACL_ACLENT_ENABLED &&
+	    aclp->acl_type == ACE_T) {
+		error = convert_ace_to_aent(aclp->acl_aclp, aclp->acl_cnt,
+		    isdir, owner, group, (aclent_t **)&acldata, &aclcnt);
+		if (error)
+			goto out;
+	} else {
+		error = ENOTSUP;
+		goto out;
+	}
+
+	/*
+	 * replace old acl with newly translated acl
+	 */
+	cacl_free(aclp->acl_aclp, aclp->acl_cnt * aclp->acl_entry_size);
+	aclp->acl_aclp = acldata;
+	aclp->acl_cnt = aclcnt;
+	if (target_flavor == _ACL_ACE_ENABLED) {
+		aclp->acl_type = ACE_T;
+		aclp->acl_entry_size = sizeof (ace_t);
+	} else {
+		aclp->acl_type = ACLENT_T;
+		aclp->acl_entry_size = sizeof (aclent_t);
+	}
+	return (0);
+
+out:
+
+#if !defined(_KERNEL)
+	errno = error;
+	return (-1);
+#else
+	return (error);
+#endif
+}
+
+#define	SET_ACE(acl, index, who, mask, type, flags) { \
+	acl[0][index].a_who = (uint32_t)who; \
+	acl[0][index].a_type = type; \
+	acl[0][index].a_flags = flags; \
+	acl[0][index++].a_access_mask = mask; \
+}
+
+void
+acl_trivial_access_masks(mode_t mode, uint32_t *allow0, uint32_t *deny1,
+    uint32_t *deny2, uint32_t *owner, uint32_t *group, uint32_t *everyone)
+{
+	*deny1 = *deny2 = *allow0 = *group = 0;
+
+	if (!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH)))
+		*deny1 |= ACE_READ_DATA;
+	if (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IWOTH)))
+		*deny1 |= ACE_WRITE_DATA;
+	if (!(mode & S_IXUSR) && (mode & (S_IXGRP|S_IXOTH)))
+		*deny1 |= ACE_EXECUTE;
+
+	if (!(mode & S_IRGRP) && (mode & S_IROTH))
+		*deny2 = ACE_READ_DATA;
+	if (!(mode & S_IWGRP) && (mode & S_IWOTH))
+		*deny2 |= ACE_WRITE_DATA;
+	if (!(mode & S_IXGRP) && (mode & S_IXOTH))
+		*deny2 |= ACE_EXECUTE;
+
+	if ((mode & S_IRUSR) && (!(mode & S_IRGRP) && (mode & S_IROTH)))
+		*allow0 |= ACE_READ_DATA;
+	if ((mode & S_IWUSR) && (!(mode & S_IWGRP) && (mode & S_IWOTH)))
+		*allow0 |= ACE_WRITE_DATA;
+	if ((mode & S_IXUSR) && (!(mode & S_IXGRP) && (mode & S_IXOTH)))
+		*allow0 |= ACE_EXECUTE;
+
+	*owner = ACE_WRITE_ATTRIBUTES|ACE_WRITE_OWNER|ACE_WRITE_ACL|
+	    ACE_WRITE_NAMED_ATTRS|ACE_READ_ACL|ACE_READ_ATTRIBUTES|
+	    ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE;
+	if (mode & S_IRUSR)
+		*owner |= ACE_READ_DATA;
+	if (mode & S_IWUSR)
+		*owner |= ACE_WRITE_DATA|ACE_APPEND_DATA;
+	if (mode & S_IXUSR)
+		*owner |= ACE_EXECUTE;
+
+	*group = ACE_READ_ACL|ACE_READ_ATTRIBUTES| ACE_READ_NAMED_ATTRS|
+	    ACE_SYNCHRONIZE;
+	if (mode & S_IRGRP)
+		*group |= ACE_READ_DATA;
+	if (mode & S_IWGRP)
+		*group |= ACE_WRITE_DATA|ACE_APPEND_DATA;
+	if (mode & S_IXGRP)
+		*group |= ACE_EXECUTE;
+
+	*everyone = ACE_READ_ACL|ACE_READ_ATTRIBUTES| ACE_READ_NAMED_ATTRS|
+	    ACE_SYNCHRONIZE;
+	if (mode & S_IROTH)
+		*everyone |= ACE_READ_DATA;
+	if (mode & S_IWOTH)
+		*everyone |= ACE_WRITE_DATA|ACE_APPEND_DATA;
+	if (mode & S_IXOTH)
+		*everyone |= ACE_EXECUTE;
+}
+
+int
+acl_trivial_create(mode_t mode, ace_t **acl, int *count)
+{
+	uint32_t	deny1, deny2;
+	uint32_t	allow0;
+	uint32_t	owner, group, everyone;
+	int 		index = 0;
+	int		error;
+
+	*count = 3;
+	acl_trivial_access_masks(mode, &allow0, &deny1, &deny2, &owner, &group,
+	    &everyone);
+
+	if (allow0)
+		(*count)++;
+	if (deny1)
+		(*count)++;
+	if (deny2)
+		(*count)++;
+
+	if ((error = cacl_malloc((void **)acl, *count * sizeof (ace_t))) != 0)
+		return (error);
+
+	if (allow0) {
+		SET_ACE(acl, index, -1, allow0, ACE_ACCESS_ALLOWED_ACE_TYPE,
+		    ACE_OWNER);
+	}
+	if (deny1) {
+		SET_ACE(acl, index, -1, deny1, ACE_ACCESS_DENIED_ACE_TYPE,
+		    ACE_OWNER);
+	}
+	if (deny2) {
+		SET_ACE(acl, index, -1, deny2, ACE_ACCESS_DENIED_ACE_TYPE,
+		    ACE_GROUP|ACE_IDENTIFIER_GROUP);
+	}
+
+	SET_ACE(acl, index, -1, owner, ACE_ACCESS_ALLOWED_ACE_TYPE, ACE_OWNER);
+	SET_ACE(acl, index, -1, group, ACE_ACCESS_ALLOWED_ACE_TYPE,
+	    ACE_IDENTIFIER_GROUP|ACE_GROUP);
+	SET_ACE(acl, index, -1, everyone, ACE_ACCESS_ALLOWED_ACE_TYPE,
+	    ACE_EVERYONE);
+
+	return (0);
+}
+
+/*
+ * ace_trivial:
+ * determine whether an ace_t acl is trivial
+ *
+ * Trivialness implies that the acl is composed of only
+ * owner, group, everyone entries.  ACL can't
+ * have read_acl denied, and write_owner/write_acl/write_attributes
+ * can only be owner@ entry.
+ */
+int
+ace_trivial_common(void *acep, int aclcnt,
+    uint64_t (*walk)(void *, uint64_t, int aclcnt,
+    uint16_t *, uint16_t *, uint32_t *))
+{
+	uint16_t flags;
+	uint32_t mask;
+	uint16_t type;
+	uint64_t cookie = 0;
+
+	while (cookie = walk(acep, cookie, aclcnt, &flags, &type, &mask)) {
+		switch (flags & ACE_TYPE_FLAGS) {
+		case ACE_OWNER:
+		case ACE_GROUP|ACE_IDENTIFIER_GROUP:
+		case ACE_EVERYONE:
+			break;
+		default:
+			return (1);
+
+		}
+
+		if (flags & (ACE_FILE_INHERIT_ACE|
+		    ACE_DIRECTORY_INHERIT_ACE|ACE_NO_PROPAGATE_INHERIT_ACE|
+		    ACE_INHERIT_ONLY_ACE))
+			return (1);
+
+		/*
+		 * Special check for some special bits
+		 *
+		 * Don't allow anybody to deny reading basic
+		 * attributes or a files ACL.
+		 */
+		if ((mask & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) &&
+		    (type == ACE_ACCESS_DENIED_ACE_TYPE))
+			return (1);
+
+		/*
+		 * Delete permissions are never set by default
+		 */
+		if (mask & (ACE_DELETE|ACE_DELETE_CHILD))
+			return (1);
+		/*
+		 * only allow owner@ to have
+		 * write_acl/write_owner/write_attributes/write_xattr/
+		 */
+		if (type == ACE_ACCESS_ALLOWED_ACE_TYPE &&
+		    (!(flags & ACE_OWNER) && (mask &
+		    (ACE_WRITE_OWNER|ACE_WRITE_ACL| ACE_WRITE_ATTRIBUTES|
+		    ACE_WRITE_NAMED_ATTRS))))
+			return (1);
+
+	}
+	return (0);
+}
+
+uint64_t
+ace_walk(void *datap, uint64_t cookie, int aclcnt, uint16_t *flags,
+    uint16_t *type, uint32_t *mask)
+{
+	ace_t *acep = datap;
+
+	if (cookie >= aclcnt)
+		return (0);
+
+	*flags = acep[cookie].a_flags;
+	*type = acep[cookie].a_type;
+	*mask = acep[cookie++].a_access_mask;
+
+	return (cookie);
+}
+
+int
+ace_trivial(ace_t *acep, int aclcnt)
+{
+	return (ace_trivial_common(acep, aclcnt, ace_walk));
+}
diff --git a/common/acl/acl_common.h b/common/acl/acl_common.h
new file mode 100644
index 000000000000..f76cbd3b450f
--- /dev/null
+++ b/common/acl/acl_common.h
@@ -0,0 +1,59 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_ACL_COMMON_H
+#define	_ACL_COMMON_H
+
+#include <sys/types.h>
+#include <sys/acl.h>
+#include <sys/stat.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+extern ace_t trivial_acl[6];
+
+extern int acltrivial(const char *);
+extern void adjust_ace_pair(ace_t *pair, mode_t mode);
+extern void adjust_ace_pair_common(void *, size_t, size_t, mode_t);
+extern int ace_trivial(ace_t *acep, int aclcnt);
+extern int ace_trivial_common(void *, int,
+    uint64_t (*walk)(void *, uint64_t, int aclcnt, uint16_t *, uint16_t *,
+    uint32_t *mask));
+extern acl_t *acl_alloc(acl_type_t);
+extern void acl_free(acl_t *aclp);
+extern int acl_translate(acl_t *aclp, int target_flavor,
+    int isdir, uid_t owner, gid_t group);
+void ksort(caddr_t v, int n, int s, int (*f)());
+int cmp2acls(void *a, void *b);
+int acl_trivial_create(mode_t mode, ace_t **acl, int *count);
+void acl_trivial_access_masks(mode_t mode, uint32_t *allow0, uint32_t *deny1,
+    uint32_t *deny2, uint32_t *owner, uint32_t *group, uint32_t *everyone);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _ACL_COMMON_H */
diff --git a/common/atomic/amd64/atomic.s b/common/atomic/amd64/atomic.s
new file mode 100644
index 000000000000..4b0d66e4db20
--- /dev/null
+++ b/common/atomic/amd64/atomic.s
@@ -0,0 +1,573 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+	.file	"atomic.s"
+
+#include <sys/asm_linkage.h>
+
+#if defined(_KERNEL)
+	/*
+	 * Legacy kernel interfaces; they will go away (eventually).
+	 */
+	ANSI_PRAGMA_WEAK2(cas8,atomic_cas_8,function)
+	ANSI_PRAGMA_WEAK2(cas32,atomic_cas_32,function)
+	ANSI_PRAGMA_WEAK2(cas64,atomic_cas_64,function)
+	ANSI_PRAGMA_WEAK2(caslong,atomic_cas_ulong,function)
+	ANSI_PRAGMA_WEAK2(casptr,atomic_cas_ptr,function)
+	ANSI_PRAGMA_WEAK2(atomic_and_long,atomic_and_ulong,function)
+	ANSI_PRAGMA_WEAK2(atomic_or_long,atomic_or_ulong,function)
+#endif
+
+	ENTRY(atomic_inc_8)
+	ALTENTRY(atomic_inc_uchar)
+	lock
+	incb	(%rdi)
+	ret
+	SET_SIZE(atomic_inc_uchar)
+	SET_SIZE(atomic_inc_8)
+
+	ENTRY(atomic_inc_16)
+	ALTENTRY(atomic_inc_ushort)
+	lock
+	incw	(%rdi)
+	ret
+	SET_SIZE(atomic_inc_ushort)
+	SET_SIZE(atomic_inc_16)
+
+	ENTRY(atomic_inc_32)
+	ALTENTRY(atomic_inc_uint)
+	lock
+	incl	(%rdi)
+	ret
+	SET_SIZE(atomic_inc_uint)
+	SET_SIZE(atomic_inc_32)
+
+	ENTRY(atomic_inc_64)
+	ALTENTRY(atomic_inc_ulong)
+	lock
+	incq	(%rdi)
+	ret
+	SET_SIZE(atomic_inc_ulong)
+	SET_SIZE(atomic_inc_64)
+
+	ENTRY(atomic_inc_8_nv)
+	ALTENTRY(atomic_inc_uchar_nv)
+	xorl	%eax, %eax	/ clear upper bits of %eax return register
+	incb	%al		/ %al = 1
+	lock
+	  xaddb	%al, (%rdi)	/ %al = old value, (%rdi) = new value
+	incb	%al		/ return new value
+	ret
+	SET_SIZE(atomic_inc_uchar_nv)
+	SET_SIZE(atomic_inc_8_nv)
+
+	ENTRY(atomic_inc_16_nv)
+	ALTENTRY(atomic_inc_ushort_nv)
+	xorl	%eax, %eax	/ clear upper bits of %eax return register
+	incw	%ax		/ %ax = 1
+	lock
+	  xaddw	%ax, (%rdi)	/ %ax = old value, (%rdi) = new value
+	incw	%ax		/ return new value
+	ret
+	SET_SIZE(atomic_inc_ushort_nv)
+	SET_SIZE(atomic_inc_16_nv)
+
+	ENTRY(atomic_inc_32_nv)
+	ALTENTRY(atomic_inc_uint_nv)
+	xorl	%eax, %eax	/ %eax = 0
+	incl	%eax		/ %eax = 1
+	lock
+	  xaddl	%eax, (%rdi)	/ %eax = old value, (%rdi) = new value
+	incl	%eax		/ return new value
+	ret
+	SET_SIZE(atomic_inc_uint_nv)
+	SET_SIZE(atomic_inc_32_nv)
+
+	ENTRY(atomic_inc_64_nv)
+	ALTENTRY(atomic_inc_ulong_nv)
+	xorq	%rax, %rax	/ %rax = 0
+	incq	%rax		/ %rax = 1
+	lock
+	  xaddq	%rax, (%rdi)	/ %rax = old value, (%rdi) = new value
+	incq	%rax		/ return new value
+	ret
+	SET_SIZE(atomic_inc_ulong_nv)
+	SET_SIZE(atomic_inc_64_nv)
+
+	ENTRY(atomic_dec_8)
+	ALTENTRY(atomic_dec_uchar)
+	lock
+	decb	(%rdi)
+	ret
+	SET_SIZE(atomic_dec_uchar)
+	SET_SIZE(atomic_dec_8)
+
+	ENTRY(atomic_dec_16)
+	ALTENTRY(atomic_dec_ushort)
+	lock
+	decw	(%rdi)
+	ret
+	SET_SIZE(atomic_dec_ushort)
+	SET_SIZE(atomic_dec_16)
+
+	ENTRY(atomic_dec_32)
+	ALTENTRY(atomic_dec_uint)
+	lock
+	decl	(%rdi)
+	ret
+	SET_SIZE(atomic_dec_uint)
+	SET_SIZE(atomic_dec_32)
+
+	ENTRY(atomic_dec_64)
+	ALTENTRY(atomic_dec_ulong)
+	lock
+	decq	(%rdi)
+	ret
+	SET_SIZE(atomic_dec_ulong)
+	SET_SIZE(atomic_dec_64)
+
+	ENTRY(atomic_dec_8_nv)
+	ALTENTRY(atomic_dec_uchar_nv)
+	xorl	%eax, %eax	/ clear upper bits of %eax return register
+	decb	%al		/ %al = -1
+	lock
+	  xaddb	%al, (%rdi)	/ %al = old value, (%rdi) = new value
+	decb	%al		/ return new value
+	ret
+	SET_SIZE(atomic_dec_uchar_nv)
+	SET_SIZE(atomic_dec_8_nv)
+
+	ENTRY(atomic_dec_16_nv)
+	ALTENTRY(atomic_dec_ushort_nv)
+	xorl	%eax, %eax	/ clear upper bits of %eax return register
+	decw	%ax		/ %ax = -1
+	lock
+	  xaddw	%ax, (%rdi)	/ %ax = old value, (%rdi) = new value
+	decw	%ax		/ return new value
+	ret
+	SET_SIZE(atomic_dec_ushort_nv)
+	SET_SIZE(atomic_dec_16_nv)
+
+	ENTRY(atomic_dec_32_nv)
+	ALTENTRY(atomic_dec_uint_nv)
+	xorl	%eax, %eax	/ %eax = 0
+	decl	%eax		/ %eax = -1
+	lock
+	  xaddl	%eax, (%rdi)	/ %eax = old value, (%rdi) = new value
+	decl	%eax		/ return new value
+	ret
+	SET_SIZE(atomic_dec_uint_nv)
+	SET_SIZE(atomic_dec_32_nv)
+
+	ENTRY(atomic_dec_64_nv)
+	ALTENTRY(atomic_dec_ulong_nv)
+	xorq	%rax, %rax	/ %rax = 0
+	decq	%rax		/ %rax = -1
+	lock
+	  xaddq	%rax, (%rdi)	/ %rax = old value, (%rdi) = new value
+	decq	%rax		/ return new value
+	ret
+	SET_SIZE(atomic_dec_ulong_nv)
+	SET_SIZE(atomic_dec_64_nv)
+
+	ENTRY(atomic_add_8)
+	ALTENTRY(atomic_add_char)
+	lock
+	addb	%sil, (%rdi)
+	ret
+	SET_SIZE(atomic_add_char)
+	SET_SIZE(atomic_add_8)
+
+	ENTRY(atomic_add_16)
+	ALTENTRY(atomic_add_short)
+	lock
+	addw	%si, (%rdi)
+	ret
+	SET_SIZE(atomic_add_short)
+	SET_SIZE(atomic_add_16)
+
+	ENTRY(atomic_add_32)
+	ALTENTRY(atomic_add_int)
+	lock
+	addl	%esi, (%rdi)
+	ret
+	SET_SIZE(atomic_add_int)
+	SET_SIZE(atomic_add_32)
+
+	ENTRY(atomic_add_64)
+	ALTENTRY(atomic_add_ptr)
+	ALTENTRY(atomic_add_long)
+	lock
+	addq	%rsi, (%rdi)
+	ret
+	SET_SIZE(atomic_add_long)
+	SET_SIZE(atomic_add_ptr)
+	SET_SIZE(atomic_add_64)
+
+	ENTRY(atomic_or_8)
+	ALTENTRY(atomic_or_uchar)
+	lock
+	orb	%sil, (%rdi)
+	ret
+	SET_SIZE(atomic_or_uchar)
+	SET_SIZE(atomic_or_8)
+
+	ENTRY(atomic_or_16)
+	ALTENTRY(atomic_or_ushort)
+	lock
+	orw	%si, (%rdi)
+	ret
+	SET_SIZE(atomic_or_ushort)
+	SET_SIZE(atomic_or_16)
+
+	ENTRY(atomic_or_32)
+	ALTENTRY(atomic_or_uint)
+	lock
+	orl	%esi, (%rdi)
+	ret
+	SET_SIZE(atomic_or_uint)
+	SET_SIZE(atomic_or_32)
+
+	ENTRY(atomic_or_64)
+	ALTENTRY(atomic_or_ulong)
+	lock
+	orq	%rsi, (%rdi)
+	ret
+	SET_SIZE(atomic_or_ulong)
+	SET_SIZE(atomic_or_64)
+
+	ENTRY(atomic_and_8)
+	ALTENTRY(atomic_and_uchar)
+	lock
+	andb	%sil, (%rdi)
+	ret
+	SET_SIZE(atomic_and_uchar)
+	SET_SIZE(atomic_and_8)
+
+	ENTRY(atomic_and_16)
+	ALTENTRY(atomic_and_ushort)
+	lock
+	andw	%si, (%rdi)
+	ret
+	SET_SIZE(atomic_and_ushort)
+	SET_SIZE(atomic_and_16)
+
+	ENTRY(atomic_and_32)
+	ALTENTRY(atomic_and_uint)
+	lock
+	andl	%esi, (%rdi)
+	ret
+	SET_SIZE(atomic_and_uint)
+	SET_SIZE(atomic_and_32)
+
+	ENTRY(atomic_and_64)
+	ALTENTRY(atomic_and_ulong)
+	lock
+	andq	%rsi, (%rdi)
+	ret
+	SET_SIZE(atomic_and_ulong)
+	SET_SIZE(atomic_and_64)
+
+	ENTRY(atomic_add_8_nv)
+	ALTENTRY(atomic_add_char_nv)
+	movzbl	%sil, %eax		/ %al = delta addend, clear upper bits
+	lock
+	  xaddb	%sil, (%rdi)		/ %sil = old value, (%rdi) = sum
+	addb	%sil, %al		/ new value = original value + delta
+	ret
+	SET_SIZE(atomic_add_char_nv)
+	SET_SIZE(atomic_add_8_nv)
+
+	ENTRY(atomic_add_16_nv)
+	ALTENTRY(atomic_add_short_nv)
+	movzwl	%si, %eax		/ %ax = delta addend, clean upper bits
+	lock
+	  xaddw	%si, (%rdi)		/ %si = old value, (%rdi) = sum
+	addw	%si, %ax		/ new value = original value + delta
+	ret
+	SET_SIZE(atomic_add_short_nv)
+	SET_SIZE(atomic_add_16_nv)
+
+	ENTRY(atomic_add_32_nv)
+	ALTENTRY(atomic_add_int_nv)
+	mov	%esi, %eax		/ %eax = delta addend
+	lock
+	  xaddl	%esi, (%rdi)		/ %esi = old value, (%rdi) = sum
+	add	%esi, %eax		/ new value = original value + delta
+	ret
+	SET_SIZE(atomic_add_int_nv)
+	SET_SIZE(atomic_add_32_nv)
+
+	ENTRY(atomic_add_64_nv)
+	ALTENTRY(atomic_add_ptr_nv)
+	ALTENTRY(atomic_add_long_nv)
+	mov	%rsi, %rax		/ %rax = delta addend
+	lock
+	  xaddq	%rsi, (%rdi)		/ %rsi = old value, (%rdi) = sum
+	addq	%rsi, %rax		/ new value = original value + delta
+	ret
+	SET_SIZE(atomic_add_long_nv)
+	SET_SIZE(atomic_add_ptr_nv)
+	SET_SIZE(atomic_add_64_nv)
+
+	ENTRY(atomic_and_8_nv)
+	ALTENTRY(atomic_and_uchar_nv)
+	movb	(%rdi), %al	/ %al = old value
+1:
+	movb	%sil, %cl
+	andb	%al, %cl	/ %cl = new value
+	lock
+	cmpxchgb %cl, (%rdi)	/ try to stick it in
+	jne	1b
+	movzbl	%cl, %eax	/ return new value
+	ret
+	SET_SIZE(atomic_and_uchar_nv)
+	SET_SIZE(atomic_and_8_nv)
+
+	ENTRY(atomic_and_16_nv)
+	ALTENTRY(atomic_and_ushort_nv)
+	movw	(%rdi), %ax	/ %ax = old value
+1:
+	movw	%si, %cx
+	andw	%ax, %cx	/ %cx = new value
+	lock
+	cmpxchgw %cx, (%rdi)	/ try to stick it in
+	jne	1b
+	movzwl	%cx, %eax	/ return new value
+	ret
+	SET_SIZE(atomic_and_ushort_nv)
+	SET_SIZE(atomic_and_16_nv)
+
+	ENTRY(atomic_and_32_nv)
+	ALTENTRY(atomic_and_uint_nv)
+	movl	(%rdi), %eax
+1:
+	movl	%esi, %ecx
+	andl	%eax, %ecx
+	lock
+	cmpxchgl %ecx, (%rdi)
+	jne	1b
+	movl	%ecx, %eax
+	ret
+	SET_SIZE(atomic_and_uint_nv)
+	SET_SIZE(atomic_and_32_nv)
+
+	ENTRY(atomic_and_64_nv)
+	ALTENTRY(atomic_and_ulong_nv)
+	movq	(%rdi), %rax
+1:
+	movq	%rsi, %rcx
+	andq	%rax, %rcx
+	lock
+	cmpxchgq %rcx, (%rdi)
+	jne	1b
+	movq	%rcx, %rax
+	ret
+	SET_SIZE(atomic_and_ulong_nv)
+	SET_SIZE(atomic_and_64_nv)
+
+	ENTRY(atomic_or_8_nv)
+	ALTENTRY(atomic_or_uchar_nv)
+	movb	(%rdi), %al	/ %al = old value
+1:
+	movb	%sil, %cl
+	orb	%al, %cl	/ %cl = new value
+	lock
+	cmpxchgb %cl, (%rdi)	/ try to stick it in
+	jne	1b
+	movzbl	%cl, %eax	/ return new value
+	ret
+	SET_SIZE(atomic_or_uchar_nv)
+	SET_SIZE(atomic_or_8_nv)
+
+	ENTRY(atomic_or_16_nv)
+	ALTENTRY(atomic_or_ushort_nv)
+	movw	(%rdi), %ax	/ %ax = old value
+1:
+	movw	%si, %cx
+	orw	%ax, %cx	/ %cx = new value
+	lock
+	cmpxchgw %cx, (%rdi)	/ try to stick it in
+	jne	1b
+	movzwl	%cx, %eax	/ return new value
+	ret
+	SET_SIZE(atomic_or_ushort_nv)
+	SET_SIZE(atomic_or_16_nv)
+
+	ENTRY(atomic_or_32_nv)
+	ALTENTRY(atomic_or_uint_nv)
+	movl	(%rdi), %eax
+1:
+	movl	%esi, %ecx
+	orl	%eax, %ecx
+	lock
+	cmpxchgl %ecx, (%rdi)
+	jne	1b
+	movl	%ecx, %eax
+	ret
+	SET_SIZE(atomic_or_uint_nv)
+	SET_SIZE(atomic_or_32_nv)
+
+	ENTRY(atomic_or_64_nv)
+	ALTENTRY(atomic_or_ulong_nv)
+	movq	(%rdi), %rax
+1:
+	movq	%rsi, %rcx
+	orq	%rax, %rcx
+	lock
+	cmpxchgq %rcx, (%rdi)
+	jne	1b
+	movq	%rcx, %rax
+	ret
+	SET_SIZE(atomic_or_ulong_nv)
+	SET_SIZE(atomic_or_64_nv)
+
+	ENTRY(atomic_cas_8)
+	ALTENTRY(atomic_cas_uchar)
+	movzbl	%sil, %eax
+	lock
+	cmpxchgb %dl, (%rdi)
+	ret
+	SET_SIZE(atomic_cas_uchar)
+	SET_SIZE(atomic_cas_8)
+
+	ENTRY(atomic_cas_16)
+	ALTENTRY(atomic_cas_ushort)
+	movzwl	%si, %eax
+	lock
+	cmpxchgw %dx, (%rdi)
+	ret
+	SET_SIZE(atomic_cas_ushort)
+	SET_SIZE(atomic_cas_16)
+
+	ENTRY(atomic_cas_32)
+	ALTENTRY(atomic_cas_uint)
+	movl	%esi, %eax
+	lock
+	cmpxchgl %edx, (%rdi)
+	ret
+	SET_SIZE(atomic_cas_uint)
+	SET_SIZE(atomic_cas_32)
+
+	ENTRY(atomic_cas_64)
+	ALTENTRY(atomic_cas_ulong)
+	ALTENTRY(atomic_cas_ptr)
+	movq	%rsi, %rax
+	lock
+	cmpxchgq %rdx, (%rdi)
+	ret
+	SET_SIZE(atomic_cas_ptr)
+	SET_SIZE(atomic_cas_ulong)
+	SET_SIZE(atomic_cas_64)
+
+	ENTRY(atomic_swap_8)
+	ALTENTRY(atomic_swap_uchar)
+	movzbl	%sil, %eax
+	lock
+	xchgb %al, (%rdi)
+	ret
+	SET_SIZE(atomic_swap_uchar)
+	SET_SIZE(atomic_swap_8)
+
+	ENTRY(atomic_swap_16)
+	ALTENTRY(atomic_swap_ushort)
+	movzwl	%si, %eax
+	lock
+	xchgw %ax, (%rdi)
+	ret
+	SET_SIZE(atomic_swap_ushort)
+	SET_SIZE(atomic_swap_16)
+
+	ENTRY(atomic_swap_32)
+	ALTENTRY(atomic_swap_uint)
+	movl	%esi, %eax
+	lock
+	xchgl %eax, (%rdi)
+	ret
+	SET_SIZE(atomic_swap_uint)
+	SET_SIZE(atomic_swap_32)
+
+	ENTRY(atomic_swap_64)
+	ALTENTRY(atomic_swap_ulong)
+	ALTENTRY(atomic_swap_ptr)
+	movq	%rsi, %rax
+	lock
+	xchgq %rax, (%rdi)
+	ret
+	SET_SIZE(atomic_swap_ptr)
+	SET_SIZE(atomic_swap_ulong)
+	SET_SIZE(atomic_swap_64)
+
+	ENTRY(atomic_set_long_excl)
+	xorl	%eax, %eax
+	lock
+	btsq	%rsi, (%rdi)
+	jnc	1f
+	decl	%eax			/ return -1
+1:
+	ret
+	SET_SIZE(atomic_set_long_excl)
+
+	ENTRY(atomic_clear_long_excl)
+	xorl	%eax, %eax
+	lock
+	btrq	%rsi, (%rdi)
+	jc	1f
+	decl	%eax			/ return -1
+1:
+	ret
+	SET_SIZE(atomic_clear_long_excl)
+
+#if !defined(_KERNEL)
+
+	/*
+	 * NOTE: membar_enter, and membar_exit are identical routines. 
+	 * We define them separately, instead of using an ALTENTRY
+	 * definitions to alias them together, so that DTrace and
+	 * debuggers will see a unique address for them, allowing 
+	 * more accurate tracing.
+	*/
+
+	ENTRY(membar_enter)
+	mfence
+	ret
+	SET_SIZE(membar_enter)
+
+	ENTRY(membar_exit)
+	mfence
+	ret
+	SET_SIZE(membar_exit)
+
+	ENTRY(membar_producer)
+	sfence
+	ret
+	SET_SIZE(membar_producer)
+
+	ENTRY(membar_consumer)
+	lfence
+	ret
+	SET_SIZE(membar_consumer)
+
+#endif	/* !_KERNEL */
diff --git a/common/atomic/i386/atomic.s b/common/atomic/i386/atomic.s
new file mode 100644
index 000000000000..4fa525ba20af
--- /dev/null
+++ b/common/atomic/i386/atomic.s
@@ -0,0 +1,720 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+	.file	"atomic.s"
+
+#include <sys/asm_linkage.h>
+
+#if defined(_KERNEL)
+	/*
+	 * Legacy kernel interfaces; they will go away (eventually).
+	 */
+	ANSI_PRAGMA_WEAK2(cas8,atomic_cas_8,function)
+	ANSI_PRAGMA_WEAK2(cas32,atomic_cas_32,function)
+	ANSI_PRAGMA_WEAK2(cas64,atomic_cas_64,function)
+	ANSI_PRAGMA_WEAK2(caslong,atomic_cas_ulong,function)
+	ANSI_PRAGMA_WEAK2(casptr,atomic_cas_ptr,function)
+	ANSI_PRAGMA_WEAK2(atomic_and_long,atomic_and_ulong,function)
+	ANSI_PRAGMA_WEAK2(atomic_or_long,atomic_or_ulong,function)
+#endif
+
+	ENTRY(atomic_inc_8)
+	ALTENTRY(atomic_inc_uchar)
+	movl	4(%esp), %eax
+	lock
+	incb	(%eax)
+	ret
+	SET_SIZE(atomic_inc_uchar)
+	SET_SIZE(atomic_inc_8)
+
+	ENTRY(atomic_inc_16)
+	ALTENTRY(atomic_inc_ushort)
+	movl	4(%esp), %eax
+	lock
+	incw	(%eax)
+	ret
+	SET_SIZE(atomic_inc_ushort)
+	SET_SIZE(atomic_inc_16)
+
+	ENTRY(atomic_inc_32)
+	ALTENTRY(atomic_inc_uint)
+	ALTENTRY(atomic_inc_ulong)
+	movl	4(%esp), %eax
+	lock
+	incl	(%eax)
+	ret
+	SET_SIZE(atomic_inc_ulong)
+	SET_SIZE(atomic_inc_uint)
+	SET_SIZE(atomic_inc_32)
+
+	ENTRY(atomic_inc_8_nv)
+	ALTENTRY(atomic_inc_uchar_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	xorl	%eax, %eax	/ clear upper bits of %eax
+	incb	%al		/ %al = 1
+	lock
+	  xaddb	%al, (%edx)	/ %al = old value, inc (%edx)
+	incb	%al	/ return new value
+	ret
+	SET_SIZE(atomic_inc_uchar_nv)
+	SET_SIZE(atomic_inc_8_nv)
+
+	ENTRY(atomic_inc_16_nv)
+	ALTENTRY(atomic_inc_ushort_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	xorl	%eax, %eax	/ clear upper bits of %eax
+	incw	%ax		/ %ax = 1
+	lock
+	  xaddw	%ax, (%edx)	/ %ax = old value, inc (%edx)
+	incw	%ax		/ return new value
+	ret
+	SET_SIZE(atomic_inc_ushort_nv)
+	SET_SIZE(atomic_inc_16_nv)
+
+	ENTRY(atomic_inc_32_nv)
+	ALTENTRY(atomic_inc_uint_nv)
+	ALTENTRY(atomic_inc_ulong_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	xorl	%eax, %eax	/ %eax = 0
+	incl	%eax		/ %eax = 1
+	lock
+	  xaddl	%eax, (%edx)	/ %eax = old value, inc (%edx)
+	incl	%eax		/ return new value
+	ret
+	SET_SIZE(atomic_inc_ulong_nv)
+	SET_SIZE(atomic_inc_uint_nv)
+	SET_SIZE(atomic_inc_32_nv)
+
+	/*
+	 * NOTE: If atomic_inc_64 and atomic_inc_64_nv are ever
+	 * separated, you need to also edit the libc i386 platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_inc_64_nv.
+	 */
+	ENTRY(atomic_inc_64)
+	ALTENTRY(atomic_inc_64_nv)
+	pushl	%edi
+	pushl	%ebx
+	movl	12(%esp), %edi	/ %edi = target address
+	movl	(%edi), %eax
+	movl	4(%edi), %edx	/ %edx:%eax = old value
+1:
+	xorl	%ebx, %ebx
+	xorl	%ecx, %ecx
+	incl	%ebx		/ %ecx:%ebx = 1
+	addl	%eax, %ebx
+	adcl	%edx, %ecx	/ add in the carry from inc
+	lock
+	cmpxchg8b (%edi)	/ try to stick it in
+	jne	1b
+	movl	%ebx, %eax
+	movl	%ecx, %edx	/ return new value
+	popl	%ebx
+	popl	%edi
+	ret
+	SET_SIZE(atomic_inc_64_nv)
+	SET_SIZE(atomic_inc_64)
+
+	ENTRY(atomic_dec_8)
+	ALTENTRY(atomic_dec_uchar)
+	movl	4(%esp), %eax
+	lock
+	decb	(%eax)
+	ret
+	SET_SIZE(atomic_dec_uchar)
+	SET_SIZE(atomic_dec_8)
+
+	ENTRY(atomic_dec_16)
+	ALTENTRY(atomic_dec_ushort)
+	movl	4(%esp), %eax
+	lock
+	decw	(%eax)
+	ret
+	SET_SIZE(atomic_dec_ushort)
+	SET_SIZE(atomic_dec_16)
+
+	ENTRY(atomic_dec_32)
+	ALTENTRY(atomic_dec_uint)
+	ALTENTRY(atomic_dec_ulong)
+	movl	4(%esp), %eax
+	lock
+	decl	(%eax)
+	ret
+	SET_SIZE(atomic_dec_ulong)
+	SET_SIZE(atomic_dec_uint)
+	SET_SIZE(atomic_dec_32)
+
+	ENTRY(atomic_dec_8_nv)
+	ALTENTRY(atomic_dec_uchar_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	xorl	%eax, %eax	/ zero upper bits of %eax
+	decb	%al		/ %al = -1
+	lock
+	  xaddb	%al, (%edx)	/ %al = old value, dec (%edx)
+	decb	%al		/ return new value
+	ret
+	SET_SIZE(atomic_dec_uchar_nv)
+	SET_SIZE(atomic_dec_8_nv)
+
+	ENTRY(atomic_dec_16_nv)
+	ALTENTRY(atomic_dec_ushort_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	xorl	%eax, %eax	/ zero upper bits of %eax
+	decw	%ax		/ %ax = -1
+	lock
+	  xaddw	%ax, (%edx)	/ %ax = old value, dec (%edx)
+	decw	%ax		/ return new value
+	ret
+	SET_SIZE(atomic_dec_ushort_nv)
+	SET_SIZE(atomic_dec_16_nv)
+
+	ENTRY(atomic_dec_32_nv)
+	ALTENTRY(atomic_dec_uint_nv)
+	ALTENTRY(atomic_dec_ulong_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	xorl	%eax, %eax	/ %eax = 0
+	decl	%eax		/ %eax = -1
+	lock
+	  xaddl	%eax, (%edx)	/ %eax = old value, dec (%edx)
+	decl	%eax		/ return new value
+	ret
+	SET_SIZE(atomic_dec_ulong_nv)
+	SET_SIZE(atomic_dec_uint_nv)
+	SET_SIZE(atomic_dec_32_nv)
+
+	/*
+	 * NOTE: If atomic_dec_64 and atomic_dec_64_nv are ever
+	 * separated, it is important to edit the libc i386 platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_dec_64_nv.
+	 */
+	ENTRY(atomic_dec_64)
+	ALTENTRY(atomic_dec_64_nv)
+	pushl	%edi
+	pushl	%ebx
+	movl	12(%esp), %edi	/ %edi = target address
+	movl	(%edi), %eax
+	movl	4(%edi), %edx	/ %edx:%eax = old value
+1:
+	xorl	%ebx, %ebx
+	xorl	%ecx, %ecx
+	not	%ecx
+	not	%ebx		/ %ecx:%ebx = -1
+	addl	%eax, %ebx
+	adcl	%edx, %ecx	/ add in the carry from inc
+	lock
+	cmpxchg8b (%edi)	/ try to stick it in
+	jne	1b
+	movl	%ebx, %eax
+	movl	%ecx, %edx	/ return new value
+	popl	%ebx
+	popl	%edi
+	ret
+	SET_SIZE(atomic_dec_64_nv)
+	SET_SIZE(atomic_dec_64)
+
+	ENTRY(atomic_add_8)
+	ALTENTRY(atomic_add_char)
+	movl	4(%esp), %eax
+	movl	8(%esp), %ecx
+	lock
+	addb	%cl, (%eax)
+	ret
+	SET_SIZE(atomic_add_char)
+	SET_SIZE(atomic_add_8)
+
+	ENTRY(atomic_add_16)
+	ALTENTRY(atomic_add_short)
+	movl	4(%esp), %eax
+	movl	8(%esp), %ecx
+	lock
+	addw	%cx, (%eax)
+	ret
+	SET_SIZE(atomic_add_short)
+	SET_SIZE(atomic_add_16)
+
+	ENTRY(atomic_add_32)
+	ALTENTRY(atomic_add_int)
+	ALTENTRY(atomic_add_ptr)
+	ALTENTRY(atomic_add_long)
+	movl	4(%esp), %eax
+	movl	8(%esp), %ecx
+	lock
+	addl	%ecx, (%eax)
+	ret
+	SET_SIZE(atomic_add_long)
+	SET_SIZE(atomic_add_ptr)
+	SET_SIZE(atomic_add_int)
+	SET_SIZE(atomic_add_32)
+
+	ENTRY(atomic_or_8)
+	ALTENTRY(atomic_or_uchar)
+	movl	4(%esp), %eax
+	movb	8(%esp), %cl
+	lock
+	orb	%cl, (%eax)
+	ret
+	SET_SIZE(atomic_or_uchar)
+	SET_SIZE(atomic_or_8)
+
+	ENTRY(atomic_or_16)
+	ALTENTRY(atomic_or_ushort)
+	movl	4(%esp), %eax
+	movw	8(%esp), %cx
+	lock
+	orw	%cx, (%eax)
+	ret
+	SET_SIZE(atomic_or_ushort)
+	SET_SIZE(atomic_or_16)
+
+	ENTRY(atomic_or_32)
+	ALTENTRY(atomic_or_uint)
+	ALTENTRY(atomic_or_ulong)
+	movl	4(%esp), %eax
+	movl	8(%esp), %ecx
+	lock
+	orl	%ecx, (%eax)
+	ret
+	SET_SIZE(atomic_or_ulong)
+	SET_SIZE(atomic_or_uint)
+	SET_SIZE(atomic_or_32)
+
+	ENTRY(atomic_and_8)
+	ALTENTRY(atomic_and_uchar)
+	movl	4(%esp), %eax
+	movb	8(%esp), %cl
+	lock
+	andb	%cl, (%eax)
+	ret
+	SET_SIZE(atomic_and_uchar)
+	SET_SIZE(atomic_and_8)
+
+	ENTRY(atomic_and_16)
+	ALTENTRY(atomic_and_ushort)
+	movl	4(%esp), %eax
+	movw	8(%esp), %cx
+	lock
+	andw	%cx, (%eax)
+	ret
+	SET_SIZE(atomic_and_ushort)
+	SET_SIZE(atomic_and_16)
+
+	ENTRY(atomic_and_32)
+	ALTENTRY(atomic_and_uint)
+	ALTENTRY(atomic_and_ulong)
+	movl	4(%esp), %eax
+	movl	8(%esp), %ecx
+	lock
+	andl	%ecx, (%eax)
+	ret
+	SET_SIZE(atomic_and_ulong)
+	SET_SIZE(atomic_and_uint)
+	SET_SIZE(atomic_and_32)
+
+	ENTRY(atomic_add_8_nv)
+	ALTENTRY(atomic_add_char_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	movb	8(%esp), %cl	/ %cl = delta
+	movzbl	%cl, %eax	/ %al = delta, zero extended
+	lock
+	  xaddb	%cl, (%edx)	/ %cl = old value, (%edx) = sum
+	addb	%cl, %al	/ return old value plus delta
+	ret
+	SET_SIZE(atomic_add_char_nv)
+	SET_SIZE(atomic_add_8_nv)
+
+	ENTRY(atomic_add_16_nv)
+	ALTENTRY(atomic_add_short_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	movw	8(%esp), %cx	/ %cx = delta
+	movzwl	%cx, %eax	/ %ax = delta, zero extended
+	lock
+	  xaddw	%cx, (%edx)	/ %cx = old value, (%edx) = sum
+	addw	%cx, %ax	/ return old value plus delta
+	ret
+	SET_SIZE(atomic_add_short_nv)
+	SET_SIZE(atomic_add_16_nv)
+
+	ENTRY(atomic_add_32_nv)
+	ALTENTRY(atomic_add_int_nv)
+	ALTENTRY(atomic_add_ptr_nv)
+	ALTENTRY(atomic_add_long_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	movl	8(%esp), %eax	/ %eax = delta
+	movl	%eax, %ecx	/ %ecx = delta
+	lock
+	  xaddl	%eax, (%edx)	/ %eax = old value, (%edx) = sum
+	addl	%ecx, %eax	/ return old value plus delta
+	ret
+	SET_SIZE(atomic_add_long_nv)
+	SET_SIZE(atomic_add_ptr_nv)
+	SET_SIZE(atomic_add_int_nv)
+	SET_SIZE(atomic_add_32_nv)
+
+	/*
+	 * NOTE: If atomic_add_64 and atomic_add_64_nv are ever
+	 * separated, it is important to edit the libc i386 platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_add_64_nv.
+	 */
+	ENTRY(atomic_add_64)
+	ALTENTRY(atomic_add_64_nv)
+	pushl	%edi
+	pushl	%ebx
+	movl	12(%esp), %edi	/ %edi = target address
+	movl	(%edi), %eax
+	movl	4(%edi), %edx	/ %edx:%eax = old value
+1:
+	movl	16(%esp), %ebx
+	movl	20(%esp), %ecx	/ %ecx:%ebx = delta
+	addl	%eax, %ebx
+	adcl	%edx, %ecx	/ %ecx:%ebx = new value
+	lock
+	cmpxchg8b (%edi)	/ try to stick it in
+	jne	1b
+	movl	%ebx, %eax
+	movl	%ecx, %edx	/ return new value
+	popl	%ebx
+	popl	%edi
+	ret
+	SET_SIZE(atomic_add_64_nv)
+	SET_SIZE(atomic_add_64)
+
+	ENTRY(atomic_or_8_nv)
+	ALTENTRY(atomic_or_uchar_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	movb	(%edx), %al	/ %al = old value
+1:
+	movl	8(%esp), %ecx	/ %ecx = delta
+	orb	%al, %cl	/ %cl = new value
+	lock
+	cmpxchgb %cl, (%edx)	/ try to stick it in
+	jne	1b
+	movzbl	%cl, %eax	/ return new value
+	ret
+	SET_SIZE(atomic_or_uchar_nv)
+	SET_SIZE(atomic_or_8_nv)
+
+	ENTRY(atomic_or_16_nv)
+	ALTENTRY(atomic_or_ushort_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	movw	(%edx), %ax	/ %ax = old value
+1:
+	movl	8(%esp), %ecx	/ %ecx = delta
+	orw	%ax, %cx	/ %cx = new value
+	lock
+	cmpxchgw %cx, (%edx)	/ try to stick it in
+	jne	1b
+	movzwl	%cx, %eax	/ return new value
+	ret
+	SET_SIZE(atomic_or_ushort_nv)
+	SET_SIZE(atomic_or_16_nv)
+
+	ENTRY(atomic_or_32_nv)
+	ALTENTRY(atomic_or_uint_nv)
+	ALTENTRY(atomic_or_ulong_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	movl	(%edx), %eax	/ %eax = old value
+1:
+	movl	8(%esp), %ecx	/ %ecx = delta
+	orl	%eax, %ecx	/ %ecx = new value
+	lock
+	cmpxchgl %ecx, (%edx)	/ try to stick it in
+	jne	1b
+	movl	%ecx, %eax	/ return new value
+	ret
+	SET_SIZE(atomic_or_ulong_nv)
+	SET_SIZE(atomic_or_uint_nv)
+	SET_SIZE(atomic_or_32_nv)
+
+	/*
+	 * NOTE: If atomic_or_64 and atomic_or_64_nv are ever
+	 * separated, it is important to edit the libc i386 platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_or_64_nv.
+	 */
+	ENTRY(atomic_or_64)
+	ALTENTRY(atomic_or_64_nv)
+	pushl	%edi
+	pushl	%ebx
+	movl	12(%esp), %edi	/ %edi = target address
+	movl	(%edi), %eax
+	movl	4(%edi), %edx	/ %edx:%eax = old value
+1:
+	movl	16(%esp), %ebx
+	movl	20(%esp), %ecx	/ %ecx:%ebx = delta
+	orl	%eax, %ebx
+	orl	%edx, %ecx	/ %ecx:%ebx = new value
+	lock
+	cmpxchg8b (%edi)	/ try to stick it in
+	jne	1b
+	movl	%ebx, %eax
+	movl	%ecx, %edx	/ return new value
+	popl	%ebx
+	popl	%edi
+	ret
+	SET_SIZE(atomic_or_64_nv)
+	SET_SIZE(atomic_or_64)
+
+	ENTRY(atomic_and_8_nv)
+	ALTENTRY(atomic_and_uchar_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	movb	(%edx), %al	/ %al = old value
+1:
+	movl	8(%esp), %ecx	/ %ecx = delta
+	andb	%al, %cl	/ %cl = new value
+	lock
+	cmpxchgb %cl, (%edx)	/ try to stick it in
+	jne	1b
+	movzbl	%cl, %eax	/ return new value
+	ret
+	SET_SIZE(atomic_and_uchar_nv)
+	SET_SIZE(atomic_and_8_nv)
+
+	ENTRY(atomic_and_16_nv)
+	ALTENTRY(atomic_and_ushort_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	movw	(%edx), %ax	/ %ax = old value
+1:
+	movl	8(%esp), %ecx	/ %ecx = delta
+	andw	%ax, %cx	/ %cx = new value
+	lock
+	cmpxchgw %cx, (%edx)	/ try to stick it in
+	jne	1b
+	movzwl	%cx, %eax	/ return new value
+	ret
+	SET_SIZE(atomic_and_ushort_nv)
+	SET_SIZE(atomic_and_16_nv)
+
+	ENTRY(atomic_and_32_nv)
+	ALTENTRY(atomic_and_uint_nv)
+	ALTENTRY(atomic_and_ulong_nv)
+	movl	4(%esp), %edx	/ %edx = target address
+	movl	(%edx), %eax	/ %eax = old value
+1:
+	movl	8(%esp), %ecx	/ %ecx = delta
+	andl	%eax, %ecx	/ %ecx = new value
+	lock
+	cmpxchgl %ecx, (%edx)	/ try to stick it in
+	jne	1b
+	movl	%ecx, %eax	/ return new value
+	ret
+	SET_SIZE(atomic_and_ulong_nv)
+	SET_SIZE(atomic_and_uint_nv)
+	SET_SIZE(atomic_and_32_nv)
+
+	/*
+	 * NOTE: If atomic_and_64 and atomic_and_64_nv are ever
+	 * separated, it is important to edit the libc i386 platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_and_64_nv.
+	 */
+	ENTRY(atomic_and_64)
+	ALTENTRY(atomic_and_64_nv)
+	pushl	%edi
+	pushl	%ebx
+	movl	12(%esp), %edi	/ %edi = target address
+	movl	(%edi), %eax
+	movl	4(%edi), %edx	/ %edx:%eax = old value
+1:
+	movl	16(%esp), %ebx
+	movl	20(%esp), %ecx	/ %ecx:%ebx = delta
+	andl	%eax, %ebx
+	andl	%edx, %ecx	/ %ecx:%ebx = new value
+	lock
+	cmpxchg8b (%edi)	/ try to stick it in
+	jne	1b
+	movl	%ebx, %eax
+	movl	%ecx, %edx	/ return new value
+	popl	%ebx
+	popl	%edi
+	ret
+	SET_SIZE(atomic_and_64_nv)
+	SET_SIZE(atomic_and_64)
+
+	ENTRY(atomic_cas_8)
+	ALTENTRY(atomic_cas_uchar)
+	movl	4(%esp), %edx
+	movzbl	8(%esp), %eax
+	movb	12(%esp), %cl
+	lock
+	cmpxchgb %cl, (%edx)
+	ret
+	SET_SIZE(atomic_cas_uchar)
+	SET_SIZE(atomic_cas_8)
+
+	ENTRY(atomic_cas_16)
+	ALTENTRY(atomic_cas_ushort)
+	movl	4(%esp), %edx
+	movzwl	8(%esp), %eax
+	movw	12(%esp), %cx
+	lock
+	cmpxchgw %cx, (%edx)
+	ret
+	SET_SIZE(atomic_cas_ushort)
+	SET_SIZE(atomic_cas_16)
+
+	ENTRY(atomic_cas_32)
+	ALTENTRY(atomic_cas_uint)
+	ALTENTRY(atomic_cas_ulong)
+	ALTENTRY(atomic_cas_ptr)
+	movl	4(%esp), %edx
+	movl	8(%esp), %eax
+	movl	12(%esp), %ecx
+	lock
+	cmpxchgl %ecx, (%edx)
+	ret
+	SET_SIZE(atomic_cas_ptr)
+	SET_SIZE(atomic_cas_ulong)
+	SET_SIZE(atomic_cas_uint)
+	SET_SIZE(atomic_cas_32)
+
+	ENTRY(atomic_cas_64)
+	pushl	%ebx
+	pushl	%esi
+	movl	12(%esp), %esi
+	movl	16(%esp), %eax
+	movl	20(%esp), %edx
+	movl	24(%esp), %ebx
+	movl	28(%esp), %ecx
+	lock
+	cmpxchg8b (%esi)
+	popl	%esi
+	popl	%ebx
+	ret
+	SET_SIZE(atomic_cas_64)
+
+	ENTRY(atomic_swap_8)
+	ALTENTRY(atomic_swap_uchar)
+	movl	4(%esp), %edx
+	movzbl	8(%esp), %eax
+	lock
+	xchgb	%al, (%edx)
+	ret
+	SET_SIZE(atomic_swap_uchar)
+	SET_SIZE(atomic_swap_8)
+
+	ENTRY(atomic_swap_16)
+	ALTENTRY(atomic_swap_ushort)
+	movl	4(%esp), %edx
+	movzwl	8(%esp), %eax
+	lock
+	xchgw	%ax, (%edx)
+	ret
+	SET_SIZE(atomic_swap_ushort)
+	SET_SIZE(atomic_swap_16)
+
+	ENTRY(atomic_swap_32)
+	ALTENTRY(atomic_swap_uint)
+	ALTENTRY(atomic_swap_ptr)
+	ALTENTRY(atomic_swap_ulong)
+	movl	4(%esp), %edx
+	movl	8(%esp), %eax
+	lock
+	xchgl	%eax, (%edx)
+	ret
+	SET_SIZE(atomic_swap_ulong)
+	SET_SIZE(atomic_swap_ptr)
+	SET_SIZE(atomic_swap_uint)
+	SET_SIZE(atomic_swap_32)
+
+	ENTRY(atomic_swap_64)
+	pushl	%esi
+	pushl	%ebx
+	movl	12(%esp), %esi
+	movl	16(%esp), %ebx
+	movl	20(%esp), %ecx
+	movl	(%esi), %eax
+	movl	4(%esi), %edx	/ %edx:%eax = old value
+1:
+	lock
+	cmpxchg8b (%esi)
+	jne	1b
+	popl	%ebx
+	popl	%esi
+	ret
+	SET_SIZE(atomic_swap_64)
+
+	ENTRY(atomic_set_long_excl)
+	movl	4(%esp), %edx	/ %edx = target address
+	movl	8(%esp), %ecx	/ %ecx = bit id
+	xorl	%eax, %eax
+	lock
+	btsl	%ecx, (%edx)
+	jnc	1f
+	decl	%eax		/ return -1
+1:
+	ret
+	SET_SIZE(atomic_set_long_excl)
+
+	ENTRY(atomic_clear_long_excl)
+	movl	4(%esp), %edx	/ %edx = target address
+	movl	8(%esp), %ecx	/ %ecx = bit id
+	xorl	%eax, %eax
+	lock
+	btrl	%ecx, (%edx)
+	jc	1f
+	decl	%eax		/ return -1
+1:
+	ret
+	SET_SIZE(atomic_clear_long_excl)
+
+#if !defined(_KERNEL)
+
+	/*
+	 * NOTE: membar_enter, membar_exit, membar_producer, and 
+	 * membar_consumer are all identical routines. We define them
+	 * separately, instead of using ALTENTRY definitions to alias them
+	 * together, so that DTrace and debuggers will see a unique address
+	 * for them, allowing more accurate tracing.
+	*/
+
+
+	ENTRY(membar_enter)
+	lock
+	xorl	$0, (%esp)
+	ret
+	SET_SIZE(membar_enter)
+
+	ENTRY(membar_exit)
+	lock
+	xorl	$0, (%esp)
+	ret
+	SET_SIZE(membar_exit)
+
+	ENTRY(membar_producer)
+	lock
+	xorl	$0, (%esp)
+	ret
+	SET_SIZE(membar_producer)
+
+	ENTRY(membar_consumer)
+	lock
+	xorl	$0, (%esp)
+	ret
+	SET_SIZE(membar_consumer)
+
+#endif	/* !_KERNEL */
diff --git a/common/atomic/sparc/atomic.s b/common/atomic/sparc/atomic.s
new file mode 100644
index 000000000000..8aa240efa297
--- /dev/null
+++ b/common/atomic/sparc/atomic.s
@@ -0,0 +1,801 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+	.file	"atomic.s"
+
+#include <sys/asm_linkage.h>
+
+#if defined(_KERNEL)
+	/*
+	 * Legacy kernel interfaces; they will go away (eventually).
+	 */
+	ANSI_PRAGMA_WEAK2(cas8,atomic_cas_8,function)
+	ANSI_PRAGMA_WEAK2(cas32,atomic_cas_32,function)
+	ANSI_PRAGMA_WEAK2(cas64,atomic_cas_64,function)
+	ANSI_PRAGMA_WEAK2(caslong,atomic_cas_ulong,function)
+	ANSI_PRAGMA_WEAK2(casptr,atomic_cas_ptr,function)
+	ANSI_PRAGMA_WEAK2(atomic_and_long,atomic_and_ulong,function)
+	ANSI_PRAGMA_WEAK2(atomic_or_long,atomic_or_ulong,function)
+	ANSI_PRAGMA_WEAK2(swapl,atomic_swap_32,function)
+#endif
+
+	/*
+	 * NOTE: If atomic_inc_8 and atomic_inc_8_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_inc_8_nv.
+	 */
+	ENTRY(atomic_inc_8)
+	ALTENTRY(atomic_inc_8_nv)
+	ALTENTRY(atomic_inc_uchar)
+	ALTENTRY(atomic_inc_uchar_nv)
+	ba	add_8
+	  add	%g0, 1, %o1
+	SET_SIZE(atomic_inc_uchar_nv)
+	SET_SIZE(atomic_inc_uchar)
+	SET_SIZE(atomic_inc_8_nv)
+	SET_SIZE(atomic_inc_8)
+
+	/*
+	 * NOTE: If atomic_dec_8 and atomic_dec_8_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_dec_8_nv.
+	 */
+	ENTRY(atomic_dec_8)
+	ALTENTRY(atomic_dec_8_nv)
+	ALTENTRY(atomic_dec_uchar)
+	ALTENTRY(atomic_dec_uchar_nv)
+	ba	add_8
+	  sub	%g0, 1, %o1
+	SET_SIZE(atomic_dec_uchar_nv)
+	SET_SIZE(atomic_dec_uchar)
+	SET_SIZE(atomic_dec_8_nv)
+	SET_SIZE(atomic_dec_8)
+
+	/*
+	 * NOTE: If atomic_add_8 and atomic_add_8_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_add_8_nv.
+	 */
+	ENTRY(atomic_add_8)
+	ALTENTRY(atomic_add_8_nv)
+	ALTENTRY(atomic_add_char)
+	ALTENTRY(atomic_add_char_nv)
+add_8:
+	and	%o0, 0x3, %o4		! %o4 = byte offset, left-to-right
+	xor	%o4, 0x3, %g1		! %g1 = byte offset, right-to-left
+	sll	%g1, 3, %g1		! %g1 = bit offset, right-to-left
+	set	0xff, %o3		! %o3 = mask
+	sll	%o3, %g1, %o3		! %o3 = shifted to bit offset
+	sll	%o1, %g1, %o1		! %o1 = shifted to bit offset
+	and	%o1, %o3, %o1		! %o1 = single byte value
+	andn	%o0, 0x3, %o0		! %o0 = word address
+	ld	[%o0], %o2		! read old value
+1:
+	add	%o2, %o1, %o5		! add value to the old value
+	and	%o5, %o3, %o5		! clear other bits
+	andn	%o2, %o3, %o4		! clear target bits
+	or	%o4, %o5, %o5		! insert the new value
+	cas	[%o0], %o2, %o5
+	cmp	%o2, %o5
+	bne,a,pn %icc, 1b
+	  mov	%o5, %o2		! %o2 = old value
+	add	%o2, %o1, %o5
+	and	%o5, %o3, %o5
+	retl
+	srl	%o5, %g1, %o0		! %o0 = new value
+	SET_SIZE(atomic_add_char_nv)
+	SET_SIZE(atomic_add_char)
+	SET_SIZE(atomic_add_8_nv)
+	SET_SIZE(atomic_add_8)
+
+	/*
+	 * NOTE: If atomic_inc_16 and atomic_inc_16_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_inc_16_nv.
+	 */
+	ENTRY(atomic_inc_16)
+	ALTENTRY(atomic_inc_16_nv)
+	ALTENTRY(atomic_inc_ushort)
+	ALTENTRY(atomic_inc_ushort_nv)
+	ba	add_16
+	  add	%g0, 1, %o1
+	SET_SIZE(atomic_inc_ushort_nv)
+	SET_SIZE(atomic_inc_ushort)
+	SET_SIZE(atomic_inc_16_nv)
+	SET_SIZE(atomic_inc_16)
+
+	/*
+	 * NOTE: If atomic_dec_16 and atomic_dec_16_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_dec_16_nv.
+	 */
+	ENTRY(atomic_dec_16)
+	ALTENTRY(atomic_dec_16_nv)
+	ALTENTRY(atomic_dec_ushort)
+	ALTENTRY(atomic_dec_ushort_nv)
+	ba	add_16
+	  sub	%g0, 1, %o1
+	SET_SIZE(atomic_dec_ushort_nv)
+	SET_SIZE(atomic_dec_ushort)
+	SET_SIZE(atomic_dec_16_nv)
+	SET_SIZE(atomic_dec_16)
+
+	/*
+	 * NOTE: If atomic_add_16 and atomic_add_16_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_add_16_nv.
+	 */
+	ENTRY(atomic_add_16)
+	ALTENTRY(atomic_add_16_nv)
+	ALTENTRY(atomic_add_short)
+	ALTENTRY(atomic_add_short_nv)
+add_16:
+	and	%o0, 0x2, %o4		! %o4 = byte offset, left-to-right
+	xor	%o4, 0x2, %g1		! %g1 = byte offset, right-to-left
+	sll	%o4, 3, %o4		! %o4 = bit offset, left-to-right
+	sll	%g1, 3, %g1		! %g1 = bit offset, right-to-left
+	sethi	%hi(0xffff0000), %o3	! %o3 = mask
+	srl	%o3, %o4, %o3		! %o3 = shifted to bit offset
+	sll	%o1, %g1, %o1		! %o1 = shifted to bit offset
+	and	%o1, %o3, %o1		! %o1 = single short value
+	andn	%o0, 0x2, %o0		! %o0 = word address
+	! if low-order bit is 1, we will properly get an alignment fault here
+	ld	[%o0], %o2		! read old value
+1:
+	add	%o1, %o2, %o5		! add value to the old value
+	and	%o5, %o3, %o5		! clear other bits
+	andn	%o2, %o3, %o4		! clear target bits
+	or	%o4, %o5, %o5		! insert the new value
+	cas	[%o0], %o2, %o5
+	cmp	%o2, %o5
+	bne,a,pn %icc, 1b
+	  mov	%o5, %o2		! %o2 = old value
+	add	%o1, %o2, %o5
+	and	%o5, %o3, %o5
+	retl
+	srl	%o5, %g1, %o0		! %o0 = new value
+	SET_SIZE(atomic_add_short_nv)
+	SET_SIZE(atomic_add_short)
+	SET_SIZE(atomic_add_16_nv)
+	SET_SIZE(atomic_add_16)
+
+	/*
+	 * NOTE: If atomic_inc_32 and atomic_inc_32_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_inc_32_nv.
+	 */
+	ENTRY(atomic_inc_32)
+	ALTENTRY(atomic_inc_32_nv)
+	ALTENTRY(atomic_inc_uint)
+	ALTENTRY(atomic_inc_uint_nv)
+	ALTENTRY(atomic_inc_ulong)
+	ALTENTRY(atomic_inc_ulong_nv)
+	ba	add_32
+	  add	%g0, 1, %o1
+	SET_SIZE(atomic_inc_ulong_nv)
+	SET_SIZE(atomic_inc_ulong)
+	SET_SIZE(atomic_inc_uint_nv)
+	SET_SIZE(atomic_inc_uint)
+	SET_SIZE(atomic_inc_32_nv)
+	SET_SIZE(atomic_inc_32)
+
+	/*
+	 * NOTE: If atomic_dec_32 and atomic_dec_32_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_dec_32_nv.
+	 */
+	ENTRY(atomic_dec_32)
+	ALTENTRY(atomic_dec_32_nv)
+	ALTENTRY(atomic_dec_uint)
+	ALTENTRY(atomic_dec_uint_nv)
+	ALTENTRY(atomic_dec_ulong)
+	ALTENTRY(atomic_dec_ulong_nv)
+	ba	add_32
+	  sub	%g0, 1, %o1
+	SET_SIZE(atomic_dec_ulong_nv)
+	SET_SIZE(atomic_dec_ulong)
+	SET_SIZE(atomic_dec_uint_nv)
+	SET_SIZE(atomic_dec_uint)
+	SET_SIZE(atomic_dec_32_nv)
+	SET_SIZE(atomic_dec_32)
+
+	/*
+	 * NOTE: If atomic_add_32 and atomic_add_32_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_add_32_nv.
+	 */
+	ENTRY(atomic_add_32)
+	ALTENTRY(atomic_add_32_nv)
+	ALTENTRY(atomic_add_int)
+	ALTENTRY(atomic_add_int_nv)
+	ALTENTRY(atomic_add_ptr)
+	ALTENTRY(atomic_add_ptr_nv)
+	ALTENTRY(atomic_add_long)
+	ALTENTRY(atomic_add_long_nv)
+add_32:
+	ld	[%o0], %o2
+1:
+	add	%o2, %o1, %o3
+	cas	[%o0], %o2, %o3
+	cmp	%o2, %o3
+	bne,a,pn %icc, 1b
+	  mov	%o3, %o2
+	retl
+	add	%o2, %o1, %o0		! return new value
+	SET_SIZE(atomic_add_long_nv)
+	SET_SIZE(atomic_add_long)
+	SET_SIZE(atomic_add_ptr_nv)
+	SET_SIZE(atomic_add_ptr)
+	SET_SIZE(atomic_add_int_nv)
+	SET_SIZE(atomic_add_int)
+	SET_SIZE(atomic_add_32_nv)
+	SET_SIZE(atomic_add_32)
+
+	/*
+	 * NOTE: If atomic_inc_64 and atomic_inc_64_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_inc_64_nv.
+	 */
+	ENTRY(atomic_inc_64)
+	ALTENTRY(atomic_inc_64_nv)
+	ba	add_64
+	  add	%g0, 1, %o1
+	SET_SIZE(atomic_inc_64_nv)
+	SET_SIZE(atomic_inc_64)
+
+	/*
+	 * NOTE: If atomic_dec_64 and atomic_dec_64_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_dec_64_nv.
+	 */
+	ENTRY(atomic_dec_64)
+	ALTENTRY(atomic_dec_64_nv)
+	ba	add_64
+	  sub	%g0, 1, %o1
+	SET_SIZE(atomic_dec_64_nv)
+	SET_SIZE(atomic_dec_64)
+
+	/*
+	 * NOTE: If atomic_add_64 and atomic_add_64_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_add_64_nv.
+	 */
+	ENTRY(atomic_add_64)
+	ALTENTRY(atomic_add_64_nv)
+	sllx	%o1, 32, %o1		! upper 32 in %o1, lower in %o2
+	srl	%o2, 0, %o2
+	add	%o1, %o2, %o1		! convert 2 32-bit args into 1 64-bit
+add_64:
+	ldx	[%o0], %o2
+1:
+	add	%o2, %o1, %o3
+	casx	[%o0], %o2, %o3
+	cmp	%o2, %o3
+	bne,a,pn %xcc, 1b
+	  mov	%o3, %o2
+	add	%o2, %o1, %o1		! return lower 32-bits in %o1
+	retl
+	srlx	%o1, 32, %o0		! return upper 32-bits in %o0
+	SET_SIZE(atomic_add_64_nv)
+	SET_SIZE(atomic_add_64)
+
+	/*
+	 * NOTE: If atomic_or_8 and atomic_or_8_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_or_8_nv.
+	 */
+	ENTRY(atomic_or_8)
+	ALTENTRY(atomic_or_8_nv)
+	ALTENTRY(atomic_or_uchar)
+	ALTENTRY(atomic_or_uchar_nv)
+	and	%o0, 0x3, %o4		! %o4 = byte offset, left-to-right
+	xor	%o4, 0x3, %g1		! %g1 = byte offset, right-to-left
+	sll	%g1, 3, %g1		! %g1 = bit offset, right-to-left
+	set	0xff, %o3		! %o3 = mask
+	sll	%o3, %g1, %o3		! %o3 = shifted to bit offset
+	sll	%o1, %g1, %o1		! %o1 = shifted to bit offset
+	and	%o1, %o3, %o1		! %o1 = single byte value
+	andn	%o0, 0x3, %o0		! %o0 = word address
+	ld	[%o0], %o2		! read old value
+1:
+	or	%o2, %o1, %o5		! or in the new value
+	cas	[%o0], %o2, %o5
+	cmp	%o2, %o5
+	bne,a,pn %icc, 1b
+	  mov	%o5, %o2		! %o2 = old value
+	or	%o2, %o1, %o5
+	and	%o5, %o3, %o5
+	retl
+	srl	%o5, %g1, %o0		! %o0 = new value
+	SET_SIZE(atomic_or_uchar_nv)
+	SET_SIZE(atomic_or_uchar)
+	SET_SIZE(atomic_or_8_nv)
+	SET_SIZE(atomic_or_8)
+
+	/*
+	 * NOTE: If atomic_or_16 and atomic_or_16_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_or_16_nv.
+	 */
+	ENTRY(atomic_or_16)
+	ALTENTRY(atomic_or_16_nv)
+	ALTENTRY(atomic_or_ushort)
+	ALTENTRY(atomic_or_ushort_nv)
+	and	%o0, 0x2, %o4		! %o4 = byte offset, left-to-right
+	xor	%o4, 0x2, %g1		! %g1 = byte offset, right-to-left
+	sll	%o4, 3, %o4		! %o4 = bit offset, left-to-right
+	sll	%g1, 3, %g1		! %g1 = bit offset, right-to-left
+	sethi	%hi(0xffff0000), %o3	! %o3 = mask
+	srl	%o3, %o4, %o3		! %o3 = shifted to bit offset
+	sll	%o1, %g1, %o1		! %o1 = shifted to bit offset
+	and	%o1, %o3, %o1		! %o1 = single short value
+	andn	%o0, 0x2, %o0		! %o0 = word address
+	! if low-order bit is 1, we will properly get an alignment fault here
+	ld	[%o0], %o2		! read old value
+1:
+	or	%o2, %o1, %o5		! or in the new value
+	cas	[%o0], %o2, %o5
+	cmp	%o2, %o5
+	bne,a,pn %icc, 1b
+	  mov	%o5, %o2		! %o2 = old value
+	or	%o2, %o1, %o5		! or in the new value
+	and	%o5, %o3, %o5
+	retl
+	srl	%o5, %g1, %o0		! %o0 = new value
+	SET_SIZE(atomic_or_ushort_nv)
+	SET_SIZE(atomic_or_ushort)
+	SET_SIZE(atomic_or_16_nv)
+	SET_SIZE(atomic_or_16)
+
+	/*
+	 * NOTE: If atomic_or_32 and atomic_or_32_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_or_32_nv.
+	 */
+	ENTRY(atomic_or_32)
+	ALTENTRY(atomic_or_32_nv)
+	ALTENTRY(atomic_or_uint)
+	ALTENTRY(atomic_or_uint_nv)
+	ALTENTRY(atomic_or_ulong)
+	ALTENTRY(atomic_or_ulong_nv)
+	ld	[%o0], %o2
+1:
+	or	%o2, %o1, %o3
+	cas	[%o0], %o2, %o3
+	cmp	%o2, %o3
+	bne,a,pn %icc, 1b
+	  mov	%o3, %o2
+	retl
+	or	%o2, %o1, %o0		! return new value
+	SET_SIZE(atomic_or_ulong_nv)
+	SET_SIZE(atomic_or_ulong)
+	SET_SIZE(atomic_or_uint_nv)
+	SET_SIZE(atomic_or_uint)
+	SET_SIZE(atomic_or_32_nv)
+	SET_SIZE(atomic_or_32)
+
+	/*
+	 * NOTE: If atomic_or_64 and atomic_or_64_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_or_64_nv.
+	 */
+	ENTRY(atomic_or_64)
+	ALTENTRY(atomic_or_64_nv)
+	sllx	%o1, 32, %o1		! upper 32 in %o1, lower in %o2
+	srl	%o2, 0, %o2
+	add	%o1, %o2, %o1		! convert 2 32-bit args into 1 64-bit
+	ldx	[%o0], %o2
+1:
+	or	%o2, %o1, %o3
+	casx	[%o0], %o2, %o3
+	cmp	%o2, %o3
+	bne,a,pn %xcc, 1b
+	  mov	%o3, %o2
+	or	%o2, %o1, %o1		! return lower 32-bits in %o1
+	retl
+	srlx	%o1, 32, %o0		! return upper 32-bits in %o0
+	SET_SIZE(atomic_or_64_nv)
+	SET_SIZE(atomic_or_64)
+
+	/*
+	 * NOTE: If atomic_and_8 and atomic_and_8_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_and_8_nv.
+	 */
+	ENTRY(atomic_and_8)
+	ALTENTRY(atomic_and_8_nv)
+	ALTENTRY(atomic_and_uchar)
+	ALTENTRY(atomic_and_uchar_nv)
+	and	%o0, 0x3, %o4		! %o4 = byte offset, left-to-right
+	xor	%o4, 0x3, %g1		! %g1 = byte offset, right-to-left
+	sll	%g1, 3, %g1		! %g1 = bit offset, right-to-left
+	set	0xff, %o3		! %o3 = mask
+	sll	%o3, %g1, %o3		! %o3 = shifted to bit offset
+	sll	%o1, %g1, %o1		! %o1 = shifted to bit offset
+	orn	%o1, %o3, %o1		! all ones in other bytes
+	andn	%o0, 0x3, %o0		! %o0 = word address
+	ld	[%o0], %o2		! read old value
+1:
+	and	%o2, %o1, %o5		! and in the new value
+	cas	[%o0], %o2, %o5
+	cmp	%o2, %o5
+	bne,a,pn %icc, 1b
+	  mov	%o5, %o2		! %o2 = old value
+	and	%o2, %o1, %o5
+	and	%o5, %o3, %o5
+	retl
+	srl	%o5, %g1, %o0		! %o0 = new value
+	SET_SIZE(atomic_and_uchar_nv)
+	SET_SIZE(atomic_and_uchar)
+	SET_SIZE(atomic_and_8_nv)
+	SET_SIZE(atomic_and_8)
+
+	/*
+	 * NOTE: If atomic_and_16 and atomic_and_16_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_and_16_nv.
+	 */
+	ENTRY(atomic_and_16)
+	ALTENTRY(atomic_and_16_nv)
+	ALTENTRY(atomic_and_ushort)
+	ALTENTRY(atomic_and_ushort_nv)
+	and	%o0, 0x2, %o4		! %o4 = byte offset, left-to-right
+	xor	%o4, 0x2, %g1		! %g1 = byte offset, right-to-left
+	sll	%o4, 3, %o4		! %o4 = bit offset, left-to-right
+	sll	%g1, 3, %g1		! %g1 = bit offset, right-to-left
+	sethi	%hi(0xffff0000), %o3	! %o3 = mask
+	srl	%o3, %o4, %o3		! %o3 = shifted to bit offset
+	sll	%o1, %g1, %o1		! %o1 = shifted to bit offset
+	orn	%o1, %o3, %o1		! all ones in the other half
+	andn	%o0, 0x2, %o0		! %o0 = word address
+	! if low-order bit is 1, we will properly get an alignment fault here
+	ld	[%o0], %o2		! read old value
+1:
+	and	%o2, %o1, %o5		! and in the new value
+	cas	[%o0], %o2, %o5
+	cmp	%o2, %o5
+	bne,a,pn %icc, 1b
+	  mov	%o5, %o2		! %o2 = old value
+	and	%o2, %o1, %o5
+	and	%o5, %o3, %o5
+	retl
+	srl	%o5, %g1, %o0		! %o0 = new value
+	SET_SIZE(atomic_and_ushort_nv)
+	SET_SIZE(atomic_and_ushort)
+	SET_SIZE(atomic_and_16_nv)
+	SET_SIZE(atomic_and_16)
+
+	/*
+	 * NOTE: If atomic_and_32 and atomic_and_32_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_and_32_nv.
+	 */
+	ENTRY(atomic_and_32)
+	ALTENTRY(atomic_and_32_nv)
+	ALTENTRY(atomic_and_uint)
+	ALTENTRY(atomic_and_uint_nv)
+	ALTENTRY(atomic_and_ulong)
+	ALTENTRY(atomic_and_ulong_nv)
+	ld	[%o0], %o2
+1:
+	and	%o2, %o1, %o3
+	cas	[%o0], %o2, %o3
+	cmp	%o2, %o3
+	bne,a,pn %icc, 1b
+	  mov	%o3, %o2
+	retl
+	and	%o2, %o1, %o0		! return new value
+	SET_SIZE(atomic_and_ulong_nv)
+	SET_SIZE(atomic_and_ulong)
+	SET_SIZE(atomic_and_uint_nv)
+	SET_SIZE(atomic_and_uint)
+	SET_SIZE(atomic_and_32_nv)
+	SET_SIZE(atomic_and_32)
+
+	/*
+	 * NOTE: If atomic_and_64 and atomic_and_64_nv are ever
+	 * separated, you need to also edit the libc sparc platform
+	 * specific mapfile and remove the NODYNSORT attribute
+	 * from atomic_and_64_nv.
+	 */
+	ENTRY(atomic_and_64)
+	ALTENTRY(atomic_and_64_nv)
+	sllx	%o1, 32, %o1		! upper 32 in %o1, lower in %o2
+	srl	%o2, 0, %o2
+	add	%o1, %o2, %o1		! convert 2 32-bit args into 1 64-bit
+	ldx	[%o0], %o2
+1:
+	and	%o2, %o1, %o3
+	casx	[%o0], %o2, %o3
+	cmp	%o2, %o3
+	bne,a,pn %xcc, 1b
+	  mov	%o3, %o2
+	and	%o2, %o1, %o1		! return lower 32-bits in %o1
+	retl
+	srlx	%o1, 32, %o0		! return upper 32-bits in %o0
+	SET_SIZE(atomic_and_64_nv)
+	SET_SIZE(atomic_and_64)
+
+	ENTRY(atomic_cas_8)
+	ALTENTRY(atomic_cas_uchar)
+	and	%o0, 0x3, %o4		! %o4 = byte offset, left-to-right
+	xor	%o4, 0x3, %g1		! %g1 = byte offset, right-to-left
+	sll	%g1, 3, %g1		! %g1 = bit offset, right-to-left
+	set	0xff, %o3		! %o3 = mask
+	sll	%o3, %g1, %o3		! %o3 = shifted to bit offset
+	sll	%o1, %g1, %o1		! %o1 = shifted to bit offset
+	and	%o1, %o3, %o1		! %o1 = single byte value
+	sll	%o2, %g1, %o2		! %o2 = shifted to bit offset
+	and	%o2, %o3, %o2		! %o2 = single byte value
+	andn	%o0, 0x3, %o0		! %o0 = word address
+	ld	[%o0], %o4		! read old value
+1:
+	andn	%o4, %o3, %o4		! clear target bits
+	or	%o4, %o2, %o5		! insert the new value
+	or	%o4, %o1, %o4		! insert the comparison value
+	cas	[%o0], %o4, %o5
+	cmp	%o4, %o5		! did we succeed?
+	be,pt	%icc, 2f
+	  and	%o5, %o3, %o4		! isolate the old value
+	cmp	%o1, %o4		! should we have succeeded?
+	be,a,pt	%icc, 1b		! yes, try again
+	  mov	%o5, %o4		! %o4 = old value
+2:
+	retl
+	srl	%o4, %g1, %o0		! %o0 = old value
+	SET_SIZE(atomic_cas_uchar)
+	SET_SIZE(atomic_cas_8)
+
+	ENTRY(atomic_cas_16)
+	ALTENTRY(atomic_cas_ushort)
+	and	%o0, 0x2, %o4		! %o4 = byte offset, left-to-right
+	xor	%o4, 0x2, %g1		! %g1 = byte offset, right-to-left
+	sll	%o4, 3, %o4		! %o4 = bit offset, left-to-right
+	sll	%g1, 3, %g1		! %g1 = bit offset, right-to-left
+	sethi	%hi(0xffff0000), %o3	! %o3 = mask
+	srl	%o3, %o4, %o3		! %o3 = shifted to bit offset
+	sll	%o1, %g1, %o1		! %o1 = shifted to bit offset
+	and	%o1, %o3, %o1		! %o1 = single short value
+	sll	%o2, %g1, %o2		! %o2 = shifted to bit offset
+	and	%o2, %o3, %o2		! %o2 = single short value
+	andn	%o0, 0x2, %o0		! %o0 = word address
+	! if low-order bit is 1, we will properly get an alignment fault here
+	ld	[%o0], %o4		! read old value
+1:
+	andn	%o4, %o3, %o4		! clear target bits
+	or	%o4, %o2, %o5		! insert the new value
+	or	%o4, %o1, %o4		! insert the comparison value
+	cas	[%o0], %o4, %o5
+	cmp	%o4, %o5		! did we succeed?
+	be,pt	%icc, 2f
+	  and	%o5, %o3, %o4		! isolate the old value
+	cmp	%o1, %o4		! should we have succeeded?
+	be,a,pt	%icc, 1b		! yes, try again
+	  mov	%o5, %o4		! %o4 = old value
+2:
+	retl
+	srl	%o4, %g1, %o0		! %o0 = old value
+	SET_SIZE(atomic_cas_ushort)
+	SET_SIZE(atomic_cas_16)
+
+	ENTRY(atomic_cas_32)
+	ALTENTRY(atomic_cas_uint)
+	ALTENTRY(atomic_cas_ptr)
+	ALTENTRY(atomic_cas_ulong)
+	cas	[%o0], %o1, %o2
+	retl
+	mov	%o2, %o0
+	SET_SIZE(atomic_cas_ulong)
+	SET_SIZE(atomic_cas_ptr)
+	SET_SIZE(atomic_cas_uint)
+	SET_SIZE(atomic_cas_32)
+
+	ENTRY(atomic_cas_64)
+	sllx	%o1, 32, %o1		! cmp's upper 32 in %o1, lower in %o2
+	srl	%o2, 0, %o2		! convert 2 32-bit args into 1 64-bit
+	add	%o1, %o2, %o1
+	sllx	%o3, 32, %o2		! newval upper 32 in %o3, lower in %o4
+	srl	%o4, 0, %o4		! setup %o2 to have newval
+	add	%o2, %o4, %o2
+	casx	[%o0], %o1, %o2
+	srl	%o2, 0, %o1		! return lower 32-bits in %o1
+	retl
+	srlx	%o2, 32, %o0		! return upper 32-bits in %o0
+	SET_SIZE(atomic_cas_64)
+
+	ENTRY(atomic_swap_8)
+	ALTENTRY(atomic_swap_uchar)
+	and	%o0, 0x3, %o4		! %o4 = byte offset, left-to-right
+	xor	%o4, 0x3, %g1		! %g1 = byte offset, right-to-left
+	sll	%g1, 3, %g1		! %g1 = bit offset, right-to-left
+	set	0xff, %o3		! %o3 = mask
+	sll	%o3, %g1, %o3		! %o3 = shifted to bit offset
+	sll	%o1, %g1, %o1		! %o1 = shifted to bit offset
+	and	%o1, %o3, %o1		! %o1 = single byte value
+	andn	%o0, 0x3, %o0		! %o0 = word address
+	ld	[%o0], %o2		! read old value
+1:
+	andn	%o2, %o3, %o5		! clear target bits
+	or	%o5, %o1, %o5		! insert the new value
+	cas	[%o0], %o2, %o5
+	cmp	%o2, %o5
+	bne,a,pn %icc, 1b
+	  mov	%o5, %o2		! %o2 = old value
+	and	%o5, %o3, %o5
+	retl
+	srl	%o5, %g1, %o0		! %o0 = old value
+	SET_SIZE(atomic_swap_uchar)
+	SET_SIZE(atomic_swap_8)
+
+	ENTRY(atomic_swap_16)
+	ALTENTRY(atomic_swap_ushort)
+	and	%o0, 0x2, %o4		! %o4 = byte offset, left-to-right
+	xor	%o4, 0x2, %g1		! %g1 = byte offset, right-to-left
+	sll	%o4, 3, %o4		! %o4 = bit offset, left-to-right
+	sll	%g1, 3, %g1		! %g1 = bit offset, right-to-left
+	sethi	%hi(0xffff0000), %o3	! %o3 = mask
+	srl	%o3, %o4, %o3		! %o3 = shifted to bit offset
+	sll	%o1, %g1, %o1		! %o1 = shifted to bit offset
+	and	%o1, %o3, %o1		! %o1 = single short value
+	andn	%o0, 0x2, %o0		! %o0 = word address
+	! if low-order bit is 1, we will properly get an alignment fault here
+	ld	[%o0], %o2		! read old value
+1:
+	andn	%o2, %o3, %o5		! clear target bits
+	or	%o5, %o1, %o5		! insert the new value
+	cas	[%o0], %o2, %o5
+	cmp	%o2, %o5
+	bne,a,pn %icc, 1b
+	  mov	%o5, %o2		! %o2 = old value
+	and	%o5, %o3, %o5
+	retl
+	srl	%o5, %g1, %o0		! %o0 = old value
+	SET_SIZE(atomic_swap_ushort)
+	SET_SIZE(atomic_swap_16)
+
+	ENTRY(atomic_swap_32)
+	ALTENTRY(atomic_swap_uint)
+	ALTENTRY(atomic_swap_ptr)
+	ALTENTRY(atomic_swap_ulong)
+	ld	[%o0], %o2
+1:
+	mov	%o1, %o3
+	cas	[%o0], %o2, %o3
+	cmp	%o2, %o3
+	bne,a,pn %icc, 1b
+	  mov	%o3, %o2
+	retl
+	mov	%o3, %o0
+	SET_SIZE(atomic_swap_ulong)
+	SET_SIZE(atomic_swap_ptr)
+	SET_SIZE(atomic_swap_uint)
+	SET_SIZE(atomic_swap_32)
+
+	ENTRY(atomic_swap_64)
+	sllx	%o1, 32, %o1		! upper 32 in %o1, lower in %o2
+	srl	%o2, 0, %o2
+	add	%o1, %o2, %o1		! convert 2 32-bit args into 1 64-bit
+	ldx	[%o0], %o2
+1:
+	mov	%o1, %o3
+	casx	[%o0], %o2, %o3
+	cmp	%o2, %o3
+	bne,a,pn %xcc, 1b
+	  mov	%o3, %o2
+	srl	%o3, 0, %o1		! return lower 32-bits in %o1
+	retl
+	srlx	%o3, 32, %o0		! return upper 32-bits in %o0
+	SET_SIZE(atomic_swap_64)
+
+	ENTRY(atomic_set_long_excl)
+	mov	1, %o3
+	slln	%o3, %o1, %o3
+	ldn	[%o0], %o2
+1:
+	andcc	%o2, %o3, %g0		! test if the bit is set
+	bnz,a,pn %ncc, 2f		! if so, then fail out
+	  mov	-1, %o0
+	or	%o2, %o3, %o4		! set the bit, and try to commit it
+	casn	[%o0], %o2, %o4
+	cmp	%o2, %o4
+	bne,a,pn %ncc, 1b		! failed to commit, try again
+	  mov	%o4, %o2
+	mov	%g0, %o0
+2:
+	retl
+	nop
+	SET_SIZE(atomic_set_long_excl)
+
+	ENTRY(atomic_clear_long_excl)
+	mov	1, %o3
+	slln	%o3, %o1, %o3
+	ldn	[%o0], %o2
+1:
+	andncc	%o3, %o2, %g0		! test if the bit is clear
+	bnz,a,pn %ncc, 2f		! if so, then fail out
+	  mov	-1, %o0
+	andn	%o2, %o3, %o4		! clear the bit, and try to commit it
+	casn	[%o0], %o2, %o4
+	cmp	%o2, %o4
+	bne,a,pn %ncc, 1b		! failed to commit, try again
+	  mov	%o4, %o2
+	mov	%g0, %o0
+2:
+	retl
+	nop
+	SET_SIZE(atomic_clear_long_excl)
+
+#if !defined(_KERNEL)
+
+	/*
+	 * Spitfires and Blackbirds have a problem with membars in the
+	 * delay slot (SF_ERRATA_51).  For safety's sake, we assume
+	 * that the whole world needs the workaround.
+	 */
+	ENTRY(membar_enter)
+	membar	#StoreLoad|#StoreStore
+	retl
+	nop
+	SET_SIZE(membar_enter)
+
+	ENTRY(membar_exit)
+	membar	#LoadStore|#StoreStore
+	retl
+	nop
+	SET_SIZE(membar_exit)
+
+	ENTRY(membar_producer)
+	membar	#StoreStore
+	retl
+	nop
+	SET_SIZE(membar_producer)
+
+	ENTRY(membar_consumer)
+	membar	#LoadLoad
+	retl
+	nop
+	SET_SIZE(membar_consumer)
+
+#endif	/* !_KERNEL */
diff --git a/common/list/list.c b/common/list/list.c
new file mode 100644
index 000000000000..94f7782a87d2
--- /dev/null
+++ b/common/list/list.c
@@ -0,0 +1,251 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * Generic doubly-linked list implementation
+ */
+
+#include <sys/list.h>
+#include <sys/list_impl.h>
+#include <sys/types.h>
+#include <sys/sysmacros.h>
+#ifdef _KERNEL
+#include <sys/debug.h>
+#else
+#include <assert.h>
+#define	ASSERT(a)	assert(a)
+#endif
+
+#ifdef lint
+extern list_node_t *list_d2l(list_t *list, void *obj);
+#else
+#define	list_d2l(a, obj) ((list_node_t *)(((char *)obj) + (a)->list_offset))
+#endif
+#define	list_object(a, node) ((void *)(((char *)node) - (a)->list_offset))
+#define	list_empty(a) ((a)->list_head.list_next == &(a)->list_head)
+
+#define	list_insert_after_node(list, node, object) {	\
+	list_node_t *lnew = list_d2l(list, object);	\
+	lnew->list_prev = (node);			\
+	lnew->list_next = (node)->list_next;		\
+	(node)->list_next->list_prev = lnew;		\
+	(node)->list_next = lnew;			\
+}
+
+#define	list_insert_before_node(list, node, object) {	\
+	list_node_t *lnew = list_d2l(list, object);	\
+	lnew->list_next = (node);			\
+	lnew->list_prev = (node)->list_prev;		\
+	(node)->list_prev->list_next = lnew;		\
+	(node)->list_prev = lnew;			\
+}
+
+#define	list_remove_node(node)					\
+	(node)->list_prev->list_next = (node)->list_next;	\
+	(node)->list_next->list_prev = (node)->list_prev;	\
+	(node)->list_next = (node)->list_prev = NULL
+
+void
+list_create(list_t *list, size_t size, size_t offset)
+{
+	ASSERT(list);
+	ASSERT(size > 0);
+	ASSERT(size >= offset + sizeof (list_node_t));
+
+	list->list_size = size;
+	list->list_offset = offset;
+	list->list_head.list_next = list->list_head.list_prev =
+	    &list->list_head;
+}
+
+void
+list_destroy(list_t *list)
+{
+	list_node_t *node = &list->list_head;
+
+	ASSERT(list);
+	ASSERT(list->list_head.list_next == node);
+	ASSERT(list->list_head.list_prev == node);
+
+	node->list_next = node->list_prev = NULL;
+}
+
+void
+list_insert_after(list_t *list, void *object, void *nobject)
+{
+	if (object == NULL) {
+		list_insert_head(list, nobject);
+	} else {
+		list_node_t *lold = list_d2l(list, object);
+		list_insert_after_node(list, lold, nobject);
+	}
+}
+
+void
+list_insert_before(list_t *list, void *object, void *nobject)
+{
+	if (object == NULL) {
+		list_insert_tail(list, nobject);
+	} else {
+		list_node_t *lold = list_d2l(list, object);
+		list_insert_before_node(list, lold, nobject);
+	}
+}
+
+void
+list_insert_head(list_t *list, void *object)
+{
+	list_node_t *lold = &list->list_head;
+	list_insert_after_node(list, lold, object);
+}
+
+void
+list_insert_tail(list_t *list, void *object)
+{
+	list_node_t *lold = &list->list_head;
+	list_insert_before_node(list, lold, object);
+}
+
+void
+list_remove(list_t *list, void *object)
+{
+	list_node_t *lold = list_d2l(list, object);
+	ASSERT(!list_empty(list));
+	ASSERT(lold->list_next != NULL);
+	list_remove_node(lold);
+}
+
+void *
+list_remove_head(list_t *list)
+{
+	list_node_t *head = list->list_head.list_next;
+	if (head == &list->list_head)
+		return (NULL);
+	list_remove_node(head);
+	return (list_object(list, head));
+}
+
+void *
+list_remove_tail(list_t *list)
+{
+	list_node_t *tail = list->list_head.list_prev;
+	if (tail == &list->list_head)
+		return (NULL);
+	list_remove_node(tail);
+	return (list_object(list, tail));
+}
+
+void *
+list_head(list_t *list)
+{
+	if (list_empty(list))
+		return (NULL);
+	return (list_object(list, list->list_head.list_next));
+}
+
+void *
+list_tail(list_t *list)
+{
+	if (list_empty(list))
+		return (NULL);
+	return (list_object(list, list->list_head.list_prev));
+}
+
+void *
+list_next(list_t *list, void *object)
+{
+	list_node_t *node = list_d2l(list, object);
+
+	if (node->list_next != &list->list_head)
+		return (list_object(list, node->list_next));
+
+	return (NULL);
+}
+
+void *
+list_prev(list_t *list, void *object)
+{
+	list_node_t *node = list_d2l(list, object);
+
+	if (node->list_prev != &list->list_head)
+		return (list_object(list, node->list_prev));
+
+	return (NULL);
+}
+
+/*
+ *  Insert src list after dst list. Empty src list thereafter.
+ */
+void
+list_move_tail(list_t *dst, list_t *src)
+{
+	list_node_t *dstnode = &dst->list_head;
+	list_node_t *srcnode = &src->list_head;
+
+	ASSERT(dst->list_size == src->list_size);
+	ASSERT(dst->list_offset == src->list_offset);
+
+	if (list_empty(src))
+		return;
+
+	dstnode->list_prev->list_next = srcnode->list_next;
+	srcnode->list_next->list_prev = dstnode->list_prev;
+	dstnode->list_prev = srcnode->list_prev;
+	srcnode->list_prev->list_next = dstnode;
+
+	/* empty src list */
+	srcnode->list_next = srcnode->list_prev = srcnode;
+}
+
+void
+list_link_replace(list_node_t *lold, list_node_t *lnew)
+{
+	ASSERT(list_link_active(lold));
+	ASSERT(!list_link_active(lnew));
+
+	lnew->list_next = lold->list_next;
+	lnew->list_prev = lold->list_prev;
+	lold->list_prev->list_next = lnew;
+	lold->list_next->list_prev = lnew;
+	lold->list_next = lold->list_prev = NULL;
+}
+
+void
+list_link_init(list_node_t *link)
+{
+	link->list_next = NULL;
+	link->list_prev = NULL;
+}
+
+int
+list_link_active(list_node_t *link)
+{
+	return (link->list_next != NULL);
+}
+
+int
+list_is_empty(list_t *list)
+{
+	return (list_empty(list));
+}
diff --git a/common/nvpair/nvpair.c b/common/nvpair/nvpair.c
new file mode 100644
index 000000000000..00d44263ccda
--- /dev/null
+++ b/common/nvpair/nvpair.c
@@ -0,0 +1,3297 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/stropts.h>
+#include <sys/debug.h>
+#include <sys/isa_defs.h>
+#include <sys/int_limits.h>
+#include <sys/nvpair.h>
+#include <sys/nvpair_impl.h>
+#include <rpc/types.h>
+#include <rpc/xdr.h>
+
+#if defined(_KERNEL) && !defined(_BOOT)
+#include <sys/varargs.h>
+#include <sys/ddi.h>
+#include <sys/sunddi.h>
+#else
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#endif
+
+#ifndef	offsetof
+#define	offsetof(s, m)		((size_t)(&(((s *)0)->m)))
+#endif
+#define	skip_whitespace(p)	while ((*(p) == ' ') || (*(p) == '\t')) p++
+
+/*
+ * nvpair.c - Provides kernel & userland interfaces for manipulating
+ *	name-value pairs.
+ *
+ * Overview Diagram
+ *
+ *  +--------------+
+ *  |  nvlist_t    |
+ *  |--------------|
+ *  | nvl_version  |
+ *  | nvl_nvflag   |
+ *  | nvl_priv    -+-+
+ *  | nvl_flag     | |
+ *  | nvl_pad      | |
+ *  +--------------+ |
+ *                   V
+ *      +--------------+      last i_nvp in list
+ *      | nvpriv_t     |  +--------------------->
+ *      |--------------|  |
+ *   +--+- nvp_list    |  |   +------------+
+ *   |  |  nvp_last   -+--+   + nv_alloc_t |
+ *   |  |  nvp_curr    |      |------------|
+ *   |  |  nvp_nva    -+----> | nva_ops    |
+ *   |  |  nvp_stat    |      | nva_arg    |
+ *   |  +--------------+      +------------+
+ *   |
+ *   +-------+
+ *           V
+ *   +---------------------+      +-------------------+
+ *   |  i_nvp_t            |  +-->|  i_nvp_t          |  +-->
+ *   |---------------------|  |   |-------------------|  |
+ *   | nvi_next           -+--+   | nvi_next         -+--+
+ *   | nvi_prev (NULL)     | <----+ nvi_prev          |
+ *   | . . . . . . . . . . |      | . . . . . . . . . |
+ *   | nvp (nvpair_t)      |      | nvp (nvpair_t)    |
+ *   |  - nvp_size         |      |  - nvp_size       |
+ *   |  - nvp_name_sz      |      |  - nvp_name_sz    |
+ *   |  - nvp_value_elem   |      |  - nvp_value_elem |
+ *   |  - nvp_type         |      |  - nvp_type       |
+ *   |  - data ...         |      |  - data ...       |
+ *   +---------------------+      +-------------------+
+ *
+ *
+ *
+ *   +---------------------+              +---------------------+
+ *   |  i_nvp_t            |  +-->    +-->|  i_nvp_t (last)     |
+ *   |---------------------|  |       |   |---------------------|
+ *   |  nvi_next          -+--+ ... --+   | nvi_next (NULL)     |
+ * <-+- nvi_prev           |<-- ...  <----+ nvi_prev            |
+ *   | . . . . . . . . .   |              | . . . . . . . . .   |
+ *   | nvp (nvpair_t)      |              | nvp (nvpair_t)      |
+ *   |  - nvp_size         |              |  - nvp_size         |
+ *   |  - nvp_name_sz      |              |  - nvp_name_sz      |
+ *   |  - nvp_value_elem   |              |  - nvp_value_elem   |
+ *   |  - DATA_TYPE_NVLIST |              |  - nvp_type         |
+ *   |  - data (embedded)  |              |  - data ...         |
+ *   |    nvlist name      |              +---------------------+
+ *   |  +--------------+   |
+ *   |  |  nvlist_t    |   |
+ *   |  |--------------|   |
+ *   |  | nvl_version  |   |
+ *   |  | nvl_nvflag   |   |
+ *   |  | nvl_priv   --+---+---->
+ *   |  | nvl_flag     |   |
+ *   |  | nvl_pad      |   |
+ *   |  +--------------+   |
+ *   +---------------------+
+ *
+ *
+ * N.B. nvpair_t may be aligned on 4 byte boundary, so +4 will
+ * allow value to be aligned on 8 byte boundary
+ *
+ * name_len is the length of the name string including the null terminator
+ * so it must be >= 1
+ */
+#define	NVP_SIZE_CALC(name_len, data_len) \
+	(NV_ALIGN((sizeof (nvpair_t)) + name_len) + NV_ALIGN(data_len))
+
+static int i_get_value_size(data_type_t type, const void *data, uint_t nelem);
+static int nvlist_add_common(nvlist_t *nvl, const char *name, data_type_t type,
+    uint_t nelem, const void *data);
+
+#define	NV_STAT_EMBEDDED	0x1
+#define	EMBEDDED_NVL(nvp)	((nvlist_t *)(void *)NVP_VALUE(nvp))
+#define	EMBEDDED_NVL_ARRAY(nvp)	((nvlist_t **)(void *)NVP_VALUE(nvp))
+
+#define	NVP_VALOFF(nvp)	(NV_ALIGN(sizeof (nvpair_t) + (nvp)->nvp_name_sz))
+#define	NVPAIR2I_NVP(nvp) \
+	((i_nvp_t *)((size_t)(nvp) - offsetof(i_nvp_t, nvi_nvp)))
+
+
+int
+nv_alloc_init(nv_alloc_t *nva, const nv_alloc_ops_t *nvo, /* args */ ...)
+{
+	va_list valist;
+	int err = 0;
+
+	nva->nva_ops = nvo;
+	nva->nva_arg = NULL;
+
+	va_start(valist, nvo);
+	if (nva->nva_ops->nv_ao_init != NULL)
+		err = nva->nva_ops->nv_ao_init(nva, valist);
+	va_end(valist);
+
+	return (err);
+}
+
+void
+nv_alloc_reset(nv_alloc_t *nva)
+{
+	if (nva->nva_ops->nv_ao_reset != NULL)
+		nva->nva_ops->nv_ao_reset(nva);
+}
+
+void
+nv_alloc_fini(nv_alloc_t *nva)
+{
+	if (nva->nva_ops->nv_ao_fini != NULL)
+		nva->nva_ops->nv_ao_fini(nva);
+}
+
+nv_alloc_t *
+nvlist_lookup_nv_alloc(nvlist_t *nvl)
+{
+	nvpriv_t *priv;
+
+	if (nvl == NULL ||
+	    (priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv) == NULL)
+		return (NULL);
+
+	return (priv->nvp_nva);
+}
+
+static void *
+nv_mem_zalloc(nvpriv_t *nvp, size_t size)
+{
+	nv_alloc_t *nva = nvp->nvp_nva;
+	void *buf;
+
+	if ((buf = nva->nva_ops->nv_ao_alloc(nva, size)) != NULL)
+		bzero(buf, size);
+
+	return (buf);
+}
+
+static void
+nv_mem_free(nvpriv_t *nvp, void *buf, size_t size)
+{
+	nv_alloc_t *nva = nvp->nvp_nva;
+
+	nva->nva_ops->nv_ao_free(nva, buf, size);
+}
+
+static void
+nv_priv_init(nvpriv_t *priv, nv_alloc_t *nva, uint32_t stat)
+{
+	bzero(priv, sizeof (nvpriv_t));
+
+	priv->nvp_nva = nva;
+	priv->nvp_stat = stat;
+}
+
+static nvpriv_t *
+nv_priv_alloc(nv_alloc_t *nva)
+{
+	nvpriv_t *priv;
+
+	/*
+	 * nv_mem_alloc() cannot called here because it needs the priv
+	 * argument.
+	 */
+	if ((priv = nva->nva_ops->nv_ao_alloc(nva, sizeof (nvpriv_t))) == NULL)
+		return (NULL);
+
+	nv_priv_init(priv, nva, 0);
+
+	return (priv);
+}
+
+/*
+ * Embedded lists need their own nvpriv_t's.  We create a new
+ * nvpriv_t using the parameters and allocator from the parent
+ * list's nvpriv_t.
+ */
+static nvpriv_t *
+nv_priv_alloc_embedded(nvpriv_t *priv)
+{
+	nvpriv_t *emb_priv;
+
+	if ((emb_priv = nv_mem_zalloc(priv, sizeof (nvpriv_t))) == NULL)
+		return (NULL);
+
+	nv_priv_init(emb_priv, priv->nvp_nva, NV_STAT_EMBEDDED);
+
+	return (emb_priv);
+}
+
+static void
+nvlist_init(nvlist_t *nvl, uint32_t nvflag, nvpriv_t *priv)
+{
+	nvl->nvl_version = NV_VERSION;
+	nvl->nvl_nvflag = nvflag & (NV_UNIQUE_NAME|NV_UNIQUE_NAME_TYPE);
+	nvl->nvl_priv = (uint64_t)(uintptr_t)priv;
+	nvl->nvl_flag = 0;
+	nvl->nvl_pad = 0;
+}
+
+uint_t
+nvlist_nvflag(nvlist_t *nvl)
+{
+	return (nvl->nvl_nvflag);
+}
+
+/*
+ * nvlist_alloc - Allocate nvlist.
+ */
+/*ARGSUSED1*/
+int
+nvlist_alloc(nvlist_t **nvlp, uint_t nvflag, int kmflag)
+{
+#if defined(_KERNEL) && !defined(_BOOT)
+	return (nvlist_xalloc(nvlp, nvflag,
+	    (kmflag == KM_SLEEP ? nv_alloc_sleep : nv_alloc_nosleep)));
+#else
+	return (nvlist_xalloc(nvlp, nvflag, nv_alloc_nosleep));
+#endif
+}
+
+int
+nvlist_xalloc(nvlist_t **nvlp, uint_t nvflag, nv_alloc_t *nva)
+{
+	nvpriv_t *priv;
+
+	if (nvlp == NULL || nva == NULL)
+		return (EINVAL);
+
+	if ((priv = nv_priv_alloc(nva)) == NULL)
+		return (ENOMEM);
+
+	if ((*nvlp = nv_mem_zalloc(priv,
+	    NV_ALIGN(sizeof (nvlist_t)))) == NULL) {
+		nv_mem_free(priv, priv, sizeof (nvpriv_t));
+		return (ENOMEM);
+	}
+
+	nvlist_init(*nvlp, nvflag, priv);
+
+	return (0);
+}
+
+/*
+ * nvp_buf_alloc - Allocate i_nvp_t for storing a new nv pair.
+ */
+static nvpair_t *
+nvp_buf_alloc(nvlist_t *nvl, size_t len)
+{
+	nvpriv_t *priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv;
+	i_nvp_t *buf;
+	nvpair_t *nvp;
+	size_t nvsize;
+
+	/*
+	 * Allocate the buffer
+	 */
+	nvsize = len + offsetof(i_nvp_t, nvi_nvp);
+
+	if ((buf = nv_mem_zalloc(priv, nvsize)) == NULL)
+		return (NULL);
+
+	nvp = &buf->nvi_nvp;
+	nvp->nvp_size = len;
+
+	return (nvp);
+}
+
+/*
+ * nvp_buf_free - de-Allocate an i_nvp_t.
+ */
+static void
+nvp_buf_free(nvlist_t *nvl, nvpair_t *nvp)
+{
+	nvpriv_t *priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv;
+	size_t nvsize = nvp->nvp_size + offsetof(i_nvp_t, nvi_nvp);
+
+	nv_mem_free(priv, NVPAIR2I_NVP(nvp), nvsize);
+}
+
+/*
+ * nvp_buf_link - link a new nv pair into the nvlist.
+ */
+static void
+nvp_buf_link(nvlist_t *nvl, nvpair_t *nvp)
+{
+	nvpriv_t *priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv;
+	i_nvp_t *curr = NVPAIR2I_NVP(nvp);
+
+	/* Put element at end of nvlist */
+	if (priv->nvp_list == NULL) {
+		priv->nvp_list = priv->nvp_last = curr;
+	} else {
+		curr->nvi_prev = priv->nvp_last;
+		priv->nvp_last->nvi_next = curr;
+		priv->nvp_last = curr;
+	}
+}
+
+/*
+ * nvp_buf_unlink - unlink an removed nvpair out of the nvlist.
+ */
+static void
+nvp_buf_unlink(nvlist_t *nvl, nvpair_t *nvp)
+{
+	nvpriv_t *priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv;
+	i_nvp_t *curr = NVPAIR2I_NVP(nvp);
+
+	/*
+	 * protect nvlist_next_nvpair() against walking on freed memory.
+	 */
+	if (priv->nvp_curr == curr)
+		priv->nvp_curr = curr->nvi_next;
+
+	if (curr == priv->nvp_list)
+		priv->nvp_list = curr->nvi_next;
+	else
+		curr->nvi_prev->nvi_next = curr->nvi_next;
+
+	if (curr == priv->nvp_last)
+		priv->nvp_last = curr->nvi_prev;
+	else
+		curr->nvi_next->nvi_prev = curr->nvi_prev;
+}
+
+/*
+ * take a nvpair type and number of elements and make sure the are valid
+ */
+static int
+i_validate_type_nelem(data_type_t type, uint_t nelem)
+{
+	switch (type) {
+	case DATA_TYPE_BOOLEAN:
+		if (nelem != 0)
+			return (EINVAL);
+		break;
+	case DATA_TYPE_BOOLEAN_VALUE:
+	case DATA_TYPE_BYTE:
+	case DATA_TYPE_INT8:
+	case DATA_TYPE_UINT8:
+	case DATA_TYPE_INT16:
+	case DATA_TYPE_UINT16:
+	case DATA_TYPE_INT32:
+	case DATA_TYPE_UINT32:
+	case DATA_TYPE_INT64:
+	case DATA_TYPE_UINT64:
+	case DATA_TYPE_STRING:
+	case DATA_TYPE_HRTIME:
+	case DATA_TYPE_NVLIST:
+#if !defined(_KERNEL)
+	case DATA_TYPE_DOUBLE:
+#endif
+		if (nelem != 1)
+			return (EINVAL);
+		break;
+	case DATA_TYPE_BOOLEAN_ARRAY:
+	case DATA_TYPE_BYTE_ARRAY:
+	case DATA_TYPE_INT8_ARRAY:
+	case DATA_TYPE_UINT8_ARRAY:
+	case DATA_TYPE_INT16_ARRAY:
+	case DATA_TYPE_UINT16_ARRAY:
+	case DATA_TYPE_INT32_ARRAY:
+	case DATA_TYPE_UINT32_ARRAY:
+	case DATA_TYPE_INT64_ARRAY:
+	case DATA_TYPE_UINT64_ARRAY:
+	case DATA_TYPE_STRING_ARRAY:
+	case DATA_TYPE_NVLIST_ARRAY:
+		/* we allow arrays with 0 elements */
+		break;
+	default:
+		return (EINVAL);
+	}
+	return (0);
+}
+
+/*
+ * Verify nvp_name_sz and check the name string length.
+ */
+static int
+i_validate_nvpair_name(nvpair_t *nvp)
+{
+	if ((nvp->nvp_name_sz <= 0) ||
+	    (nvp->nvp_size < NVP_SIZE_CALC(nvp->nvp_name_sz, 0)))
+		return (EFAULT);
+
+	/* verify the name string, make sure its terminated */
+	if (NVP_NAME(nvp)[nvp->nvp_name_sz - 1] != '\0')
+		return (EFAULT);
+
+	return (strlen(NVP_NAME(nvp)) == nvp->nvp_name_sz - 1 ? 0 : EFAULT);
+}
+
+static int
+i_validate_nvpair_value(data_type_t type, uint_t nelem, const void *data)
+{
+	switch (type) {
+	case DATA_TYPE_BOOLEAN_VALUE:
+		if (*(boolean_t *)data != B_TRUE &&
+		    *(boolean_t *)data != B_FALSE)
+			return (EINVAL);
+		break;
+	case DATA_TYPE_BOOLEAN_ARRAY: {
+		int i;
+
+		for (i = 0; i < nelem; i++)
+			if (((boolean_t *)data)[i] != B_TRUE &&
+			    ((boolean_t *)data)[i] != B_FALSE)
+				return (EINVAL);
+		break;
+	}
+	default:
+		break;
+	}
+
+	return (0);
+}
+
+/*
+ * This function takes a pointer to what should be a nvpair and it's size
+ * and then verifies that all the nvpair fields make sense and can be
+ * trusted.  This function is used when decoding packed nvpairs.
+ */
+static int
+i_validate_nvpair(nvpair_t *nvp)
+{
+	data_type_t type = NVP_TYPE(nvp);
+	int size1, size2;
+
+	/* verify nvp_name_sz, check the name string length */
+	if (i_validate_nvpair_name(nvp) != 0)
+		return (EFAULT);
+
+	if (i_validate_nvpair_value(type, NVP_NELEM(nvp), NVP_VALUE(nvp)) != 0)
+		return (EFAULT);
+
+	/*
+	 * verify nvp_type, nvp_value_elem, and also possibly
+	 * verify string values and get the value size.
+	 */
+	size2 = i_get_value_size(type, NVP_VALUE(nvp), NVP_NELEM(nvp));
+	size1 = nvp->nvp_size - NVP_VALOFF(nvp);
+	if (size2 < 0 || size1 != NV_ALIGN(size2))
+		return (EFAULT);
+
+	return (0);
+}
+
+static int
+nvlist_copy_pairs(nvlist_t *snvl, nvlist_t *dnvl)
+{
+	nvpriv_t *priv;
+	i_nvp_t *curr;
+
+	if ((priv = (nvpriv_t *)(uintptr_t)snvl->nvl_priv) == NULL)
+		return (EINVAL);
+
+	for (curr = priv->nvp_list; curr != NULL; curr = curr->nvi_next) {
+		nvpair_t *nvp = &curr->nvi_nvp;
+		int err;
+
+		if ((err = nvlist_add_common(dnvl, NVP_NAME(nvp), NVP_TYPE(nvp),
+		    NVP_NELEM(nvp), NVP_VALUE(nvp))) != 0)
+			return (err);
+	}
+
+	return (0);
+}
+
+/*
+ * Frees all memory allocated for an nvpair (like embedded lists) with
+ * the exception of the nvpair buffer itself.
+ */
+static void
+nvpair_free(nvpair_t *nvp)
+{
+	switch (NVP_TYPE(nvp)) {
+	case DATA_TYPE_NVLIST:
+		nvlist_free(EMBEDDED_NVL(nvp));
+		break;
+	case DATA_TYPE_NVLIST_ARRAY: {
+		nvlist_t **nvlp = EMBEDDED_NVL_ARRAY(nvp);
+		int i;
+
+		for (i = 0; i < NVP_NELEM(nvp); i++)
+			if (nvlp[i] != NULL)
+				nvlist_free(nvlp[i]);
+		break;
+	}
+	default:
+		break;
+	}
+}
+
+/*
+ * nvlist_free - free an unpacked nvlist
+ */
+void
+nvlist_free(nvlist_t *nvl)
+{
+	nvpriv_t *priv;
+	i_nvp_t *curr;
+
+	if (nvl == NULL ||
+	    (priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv) == NULL)
+		return;
+
+	/*
+	 * Unpacked nvlist are linked through i_nvp_t
+	 */
+	curr = priv->nvp_list;
+	while (curr != NULL) {
+		nvpair_t *nvp = &curr->nvi_nvp;
+		curr = curr->nvi_next;
+
+		nvpair_free(nvp);
+		nvp_buf_free(nvl, nvp);
+	}
+
+	if (!(priv->nvp_stat & NV_STAT_EMBEDDED))
+		nv_mem_free(priv, nvl, NV_ALIGN(sizeof (nvlist_t)));
+	else
+		nvl->nvl_priv = 0;
+
+	nv_mem_free(priv, priv, sizeof (nvpriv_t));
+}
+
+static int
+nvlist_contains_nvp(nvlist_t *nvl, nvpair_t *nvp)
+{
+	nvpriv_t *priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv;
+	i_nvp_t *curr;
+
+	if (nvp == NULL)
+		return (0);
+
+	for (curr = priv->nvp_list; curr != NULL; curr = curr->nvi_next)
+		if (&curr->nvi_nvp == nvp)
+			return (1);
+
+	return (0);
+}
+
+/*
+ * Make a copy of nvlist
+ */
+/*ARGSUSED1*/
+int
+nvlist_dup(nvlist_t *nvl, nvlist_t **nvlp, int kmflag)
+{
+#if defined(_KERNEL) && !defined(_BOOT)
+	return (nvlist_xdup(nvl, nvlp,
+	    (kmflag == KM_SLEEP ? nv_alloc_sleep : nv_alloc_nosleep)));
+#else
+	return (nvlist_xdup(nvl, nvlp, nv_alloc_nosleep));
+#endif
+}
+
+int
+nvlist_xdup(nvlist_t *nvl, nvlist_t **nvlp, nv_alloc_t *nva)
+{
+	int err;
+	nvlist_t *ret;
+
+	if (nvl == NULL || nvlp == NULL)
+		return (EINVAL);
+
+	if ((err = nvlist_xalloc(&ret, nvl->nvl_nvflag, nva)) != 0)
+		return (err);
+
+	if ((err = nvlist_copy_pairs(nvl, ret)) != 0)
+		nvlist_free(ret);
+	else
+		*nvlp = ret;
+
+	return (err);
+}
+
+/*
+ * Remove all with matching name
+ */
+int
+nvlist_remove_all(nvlist_t *nvl, const char *name)
+{
+	nvpriv_t *priv;
+	i_nvp_t *curr;
+	int error = ENOENT;
+
+	if (nvl == NULL || name == NULL ||
+	    (priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv) == NULL)
+		return (EINVAL);
+
+	curr = priv->nvp_list;
+	while (curr != NULL) {
+		nvpair_t *nvp = &curr->nvi_nvp;
+
+		curr = curr->nvi_next;
+		if (strcmp(name, NVP_NAME(nvp)) != 0)
+			continue;
+
+		nvp_buf_unlink(nvl, nvp);
+		nvpair_free(nvp);
+		nvp_buf_free(nvl, nvp);
+
+		error = 0;
+	}
+
+	return (error);
+}
+
+/*
+ * Remove first one with matching name and type
+ */
+int
+nvlist_remove(nvlist_t *nvl, const char *name, data_type_t type)
+{
+	nvpriv_t *priv;
+	i_nvp_t *curr;
+
+	if (nvl == NULL || name == NULL ||
+	    (priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv) == NULL)
+		return (EINVAL);
+
+	curr = priv->nvp_list;
+	while (curr != NULL) {
+		nvpair_t *nvp = &curr->nvi_nvp;
+
+		if (strcmp(name, NVP_NAME(nvp)) == 0 && NVP_TYPE(nvp) == type) {
+			nvp_buf_unlink(nvl, nvp);
+			nvpair_free(nvp);
+			nvp_buf_free(nvl, nvp);
+
+			return (0);
+		}
+		curr = curr->nvi_next;
+	}
+
+	return (ENOENT);
+}
+
+int
+nvlist_remove_nvpair(nvlist_t *nvl, nvpair_t *nvp)
+{
+	if (nvl == NULL || nvp == NULL)
+		return (EINVAL);
+
+	nvp_buf_unlink(nvl, nvp);
+	nvpair_free(nvp);
+	nvp_buf_free(nvl, nvp);
+	return (0);
+}
+
+/*
+ * This function calculates the size of an nvpair value.
+ *
+ * The data argument controls the behavior in case of the data types
+ * 	DATA_TYPE_STRING    	and
+ *	DATA_TYPE_STRING_ARRAY
+ * Is data == NULL then the size of the string(s) is excluded.
+ */
+static int
+i_get_value_size(data_type_t type, const void *data, uint_t nelem)
+{
+	uint64_t value_sz;
+
+	if (i_validate_type_nelem(type, nelem) != 0)
+		return (-1);
+
+	/* Calculate required size for holding value */
+	switch (type) {
+	case DATA_TYPE_BOOLEAN:
+		value_sz = 0;
+		break;
+	case DATA_TYPE_BOOLEAN_VALUE:
+		value_sz = sizeof (boolean_t);
+		break;
+	case DATA_TYPE_BYTE:
+		value_sz = sizeof (uchar_t);
+		break;
+	case DATA_TYPE_INT8:
+		value_sz = sizeof (int8_t);
+		break;
+	case DATA_TYPE_UINT8:
+		value_sz = sizeof (uint8_t);
+		break;
+	case DATA_TYPE_INT16:
+		value_sz = sizeof (int16_t);
+		break;
+	case DATA_TYPE_UINT16:
+		value_sz = sizeof (uint16_t);
+		break;
+	case DATA_TYPE_INT32:
+		value_sz = sizeof (int32_t);
+		break;
+	case DATA_TYPE_UINT32:
+		value_sz = sizeof (uint32_t);
+		break;
+	case DATA_TYPE_INT64:
+		value_sz = sizeof (int64_t);
+		break;
+	case DATA_TYPE_UINT64:
+		value_sz = sizeof (uint64_t);
+		break;
+#if !defined(_KERNEL)
+	case DATA_TYPE_DOUBLE:
+		value_sz = sizeof (double);
+		break;
+#endif
+	case DATA_TYPE_STRING:
+		if (data == NULL)
+			value_sz = 0;
+		else
+			value_sz = strlen(data) + 1;
+		break;
+	case DATA_TYPE_BOOLEAN_ARRAY:
+		value_sz = (uint64_t)nelem * sizeof (boolean_t);
+		break;
+	case DATA_TYPE_BYTE_ARRAY:
+		value_sz = (uint64_t)nelem * sizeof (uchar_t);
+		break;
+	case DATA_TYPE_INT8_ARRAY:
+		value_sz = (uint64_t)nelem * sizeof (int8_t);
+		break;
+	case DATA_TYPE_UINT8_ARRAY:
+		value_sz = (uint64_t)nelem * sizeof (uint8_t);
+		break;
+	case DATA_TYPE_INT16_ARRAY:
+		value_sz = (uint64_t)nelem * sizeof (int16_t);
+		break;
+	case DATA_TYPE_UINT16_ARRAY:
+		value_sz = (uint64_t)nelem * sizeof (uint16_t);
+		break;
+	case DATA_TYPE_INT32_ARRAY:
+		value_sz = (uint64_t)nelem * sizeof (int32_t);
+		break;
+	case DATA_TYPE_UINT32_ARRAY:
+		value_sz = (uint64_t)nelem * sizeof (uint32_t);
+		break;
+	case DATA_TYPE_INT64_ARRAY:
+		value_sz = (uint64_t)nelem * sizeof (int64_t);
+		break;
+	case DATA_TYPE_UINT64_ARRAY:
+		value_sz = (uint64_t)nelem * sizeof (uint64_t);
+		break;
+	case DATA_TYPE_STRING_ARRAY:
+		value_sz = (uint64_t)nelem * sizeof (uint64_t);
+
+		if (data != NULL) {
+			char *const *strs = data;
+			uint_t i;
+
+			/* no alignment requirement for strings */
+			for (i = 0; i < nelem; i++) {
+				if (strs[i] == NULL)
+					return (-1);
+				value_sz += strlen(strs[i]) + 1;
+			}
+		}
+		break;
+	case DATA_TYPE_HRTIME:
+		value_sz = sizeof (hrtime_t);
+		break;
+	case DATA_TYPE_NVLIST:
+		value_sz = NV_ALIGN(sizeof (nvlist_t));
+		break;
+	case DATA_TYPE_NVLIST_ARRAY:
+		value_sz = (uint64_t)nelem * sizeof (uint64_t) +
+		    (uint64_t)nelem * NV_ALIGN(sizeof (nvlist_t));
+		break;
+	default:
+		return (-1);
+	}
+
+	return (value_sz > INT32_MAX ? -1 : (int)value_sz);
+}
+
+static int
+nvlist_copy_embedded(nvlist_t *nvl, nvlist_t *onvl, nvlist_t *emb_nvl)
+{
+	nvpriv_t *priv;
+	int err;
+
+	if ((priv = nv_priv_alloc_embedded((nvpriv_t *)(uintptr_t)
+	    nvl->nvl_priv)) == NULL)
+		return (ENOMEM);
+
+	nvlist_init(emb_nvl, onvl->nvl_nvflag, priv);
+
+	if ((err = nvlist_copy_pairs(onvl, emb_nvl)) != 0) {
+		nvlist_free(emb_nvl);
+		emb_nvl->nvl_priv = 0;
+	}
+
+	return (err);
+}
+
+/*
+ * nvlist_add_common - Add new <name,value> pair to nvlist
+ */
+static int
+nvlist_add_common(nvlist_t *nvl, const char *name,
+    data_type_t type, uint_t nelem, const void *data)
+{
+	nvpair_t *nvp;
+	uint_t i;
+
+	int nvp_sz, name_sz, value_sz;
+	int err = 0;
+
+	if (name == NULL || nvl == NULL || nvl->nvl_priv == 0)
+		return (EINVAL);
+
+	if (nelem != 0 && data == NULL)
+		return (EINVAL);
+
+	/*
+	 * Verify type and nelem and get the value size.
+	 * In case of data types DATA_TYPE_STRING and DATA_TYPE_STRING_ARRAY
+	 * is the size of the string(s) included.
+	 */
+	if ((value_sz = i_get_value_size(type, data, nelem)) < 0)
+		return (EINVAL);
+
+	if (i_validate_nvpair_value(type, nelem, data) != 0)
+		return (EINVAL);
+
+	/*
+	 * If we're adding an nvlist or nvlist array, ensure that we are not
+	 * adding the input nvlist to itself, which would cause recursion,
+	 * and ensure that no NULL nvlist pointers are present.
+	 */
+	switch (type) {
+	case DATA_TYPE_NVLIST:
+		if (data == nvl || data == NULL)
+			return (EINVAL);
+		break;
+	case DATA_TYPE_NVLIST_ARRAY: {
+		nvlist_t **onvlp = (nvlist_t **)data;
+		for (i = 0; i < nelem; i++) {
+			if (onvlp[i] == nvl || onvlp[i] == NULL)
+				return (EINVAL);
+		}
+		break;
+	}
+	default:
+		break;
+	}
+
+	/* calculate sizes of the nvpair elements and the nvpair itself */
+	name_sz = strlen(name) + 1;
+
+	nvp_sz = NVP_SIZE_CALC(name_sz, value_sz);
+
+	if ((nvp = nvp_buf_alloc(nvl, nvp_sz)) == NULL)
+		return (ENOMEM);
+
+	ASSERT(nvp->nvp_size == nvp_sz);
+	nvp->nvp_name_sz = name_sz;
+	nvp->nvp_value_elem = nelem;
+	nvp->nvp_type = type;
+	bcopy(name, NVP_NAME(nvp), name_sz);
+
+	switch (type) {
+	case DATA_TYPE_BOOLEAN:
+		break;
+	case DATA_TYPE_STRING_ARRAY: {
+		char *const *strs = data;
+		char *buf = NVP_VALUE(nvp);
+		char **cstrs = (void *)buf;
+
+		/* skip pre-allocated space for pointer array */
+		buf += nelem * sizeof (uint64_t);
+		for (i = 0; i < nelem; i++) {
+			int slen = strlen(strs[i]) + 1;
+			bcopy(strs[i], buf, slen);
+			cstrs[i] = buf;
+			buf += slen;
+		}
+		break;
+	}
+	case DATA_TYPE_NVLIST: {
+		nvlist_t *nnvl = EMBEDDED_NVL(nvp);
+		nvlist_t *onvl = (nvlist_t *)data;
+
+		if ((err = nvlist_copy_embedded(nvl, onvl, nnvl)) != 0) {
+			nvp_buf_free(nvl, nvp);
+			return (err);
+		}
+		break;
+	}
+	case DATA_TYPE_NVLIST_ARRAY: {
+		nvlist_t **onvlp = (nvlist_t **)data;
+		nvlist_t **nvlp = EMBEDDED_NVL_ARRAY(nvp);
+		nvlist_t *embedded = (nvlist_t *)
+		    ((uintptr_t)nvlp + nelem * sizeof (uint64_t));
+
+		for (i = 0; i < nelem; i++) {
+			if ((err = nvlist_copy_embedded(nvl,
+			    onvlp[i], embedded)) != 0) {
+				/*
+				 * Free any successfully created lists
+				 */
+				nvpair_free(nvp);
+				nvp_buf_free(nvl, nvp);
+				return (err);
+			}
+
+			nvlp[i] = embedded++;
+		}
+		break;
+	}
+	default:
+		bcopy(data, NVP_VALUE(nvp), value_sz);
+	}
+
+	/* if unique name, remove before add */
+	if (nvl->nvl_nvflag & NV_UNIQUE_NAME)
+		(void) nvlist_remove_all(nvl, name);
+	else if (nvl->nvl_nvflag & NV_UNIQUE_NAME_TYPE)
+		(void) nvlist_remove(nvl, name, type);
+
+	nvp_buf_link(nvl, nvp);
+
+	return (0);
+}
+
+int
+nvlist_add_boolean(nvlist_t *nvl, const char *name)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_BOOLEAN, 0, NULL));
+}
+
+int
+nvlist_add_boolean_value(nvlist_t *nvl, const char *name, boolean_t val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_BOOLEAN_VALUE, 1, &val));
+}
+
+int
+nvlist_add_byte(nvlist_t *nvl, const char *name, uchar_t val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_BYTE, 1, &val));
+}
+
+int
+nvlist_add_int8(nvlist_t *nvl, const char *name, int8_t val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_INT8, 1, &val));
+}
+
+int
+nvlist_add_uint8(nvlist_t *nvl, const char *name, uint8_t val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_UINT8, 1, &val));
+}
+
+int
+nvlist_add_int16(nvlist_t *nvl, const char *name, int16_t val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_INT16, 1, &val));
+}
+
+int
+nvlist_add_uint16(nvlist_t *nvl, const char *name, uint16_t val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_UINT16, 1, &val));
+}
+
+int
+nvlist_add_int32(nvlist_t *nvl, const char *name, int32_t val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_INT32, 1, &val));
+}
+
+int
+nvlist_add_uint32(nvlist_t *nvl, const char *name, uint32_t val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_UINT32, 1, &val));
+}
+
+int
+nvlist_add_int64(nvlist_t *nvl, const char *name, int64_t val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_INT64, 1, &val));
+}
+
+int
+nvlist_add_uint64(nvlist_t *nvl, const char *name, uint64_t val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_UINT64, 1, &val));
+}
+
+#if !defined(_KERNEL)
+int
+nvlist_add_double(nvlist_t *nvl, const char *name, double val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_DOUBLE, 1, &val));
+}
+#endif
+
+int
+nvlist_add_string(nvlist_t *nvl, const char *name, const char *val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_STRING, 1, (void *)val));
+}
+
+int
+nvlist_add_boolean_array(nvlist_t *nvl, const char *name,
+    boolean_t *a, uint_t n)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_BOOLEAN_ARRAY, n, a));
+}
+
+int
+nvlist_add_byte_array(nvlist_t *nvl, const char *name, uchar_t *a, uint_t n)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_BYTE_ARRAY, n, a));
+}
+
+int
+nvlist_add_int8_array(nvlist_t *nvl, const char *name, int8_t *a, uint_t n)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_INT8_ARRAY, n, a));
+}
+
+int
+nvlist_add_uint8_array(nvlist_t *nvl, const char *name, uint8_t *a, uint_t n)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_UINT8_ARRAY, n, a));
+}
+
+int
+nvlist_add_int16_array(nvlist_t *nvl, const char *name, int16_t *a, uint_t n)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_INT16_ARRAY, n, a));
+}
+
+int
+nvlist_add_uint16_array(nvlist_t *nvl, const char *name, uint16_t *a, uint_t n)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_UINT16_ARRAY, n, a));
+}
+
+int
+nvlist_add_int32_array(nvlist_t *nvl, const char *name, int32_t *a, uint_t n)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_INT32_ARRAY, n, a));
+}
+
+int
+nvlist_add_uint32_array(nvlist_t *nvl, const char *name, uint32_t *a, uint_t n)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_UINT32_ARRAY, n, a));
+}
+
+int
+nvlist_add_int64_array(nvlist_t *nvl, const char *name, int64_t *a, uint_t n)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_INT64_ARRAY, n, a));
+}
+
+int
+nvlist_add_uint64_array(nvlist_t *nvl, const char *name, uint64_t *a, uint_t n)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_UINT64_ARRAY, n, a));
+}
+
+int
+nvlist_add_string_array(nvlist_t *nvl, const char *name,
+    char *const *a, uint_t n)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_STRING_ARRAY, n, a));
+}
+
+int
+nvlist_add_hrtime(nvlist_t *nvl, const char *name, hrtime_t val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_HRTIME, 1, &val));
+}
+
+int
+nvlist_add_nvlist(nvlist_t *nvl, const char *name, nvlist_t *val)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_NVLIST, 1, val));
+}
+
+int
+nvlist_add_nvlist_array(nvlist_t *nvl, const char *name, nvlist_t **a, uint_t n)
+{
+	return (nvlist_add_common(nvl, name, DATA_TYPE_NVLIST_ARRAY, n, a));
+}
+
+/* reading name-value pairs */
+nvpair_t *
+nvlist_next_nvpair(nvlist_t *nvl, nvpair_t *nvp)
+{
+	nvpriv_t *priv;
+	i_nvp_t *curr;
+
+	if (nvl == NULL ||
+	    (priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv) == NULL)
+		return (NULL);
+
+	curr = NVPAIR2I_NVP(nvp);
+
+	/*
+	 * Ensure that nvp is a valid nvpair on this nvlist.
+	 * NB: nvp_curr is used only as a hint so that we don't always
+	 * have to walk the list to determine if nvp is still on the list.
+	 */
+	if (nvp == NULL)
+		curr = priv->nvp_list;
+	else if (priv->nvp_curr == curr || nvlist_contains_nvp(nvl, nvp))
+		curr = curr->nvi_next;
+	else
+		curr = NULL;
+
+	priv->nvp_curr = curr;
+
+	return (curr != NULL ? &curr->nvi_nvp : NULL);
+}
+
+nvpair_t *
+nvlist_prev_nvpair(nvlist_t *nvl, nvpair_t *nvp)
+{
+	nvpriv_t *priv;
+	i_nvp_t *curr;
+
+	if (nvl == NULL ||
+	    (priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv) == NULL)
+		return (NULL);
+
+	curr = NVPAIR2I_NVP(nvp);
+
+	if (nvp == NULL)
+		curr = priv->nvp_last;
+	else if (priv->nvp_curr == curr || nvlist_contains_nvp(nvl, nvp))
+		curr = curr->nvi_prev;
+	else
+		curr = NULL;
+
+	priv->nvp_curr = curr;
+
+	return (curr != NULL ? &curr->nvi_nvp : NULL);
+}
+
+boolean_t
+nvlist_empty(nvlist_t *nvl)
+{
+	nvpriv_t *priv;
+
+	if (nvl == NULL ||
+	    (priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv) == NULL)
+		return (B_TRUE);
+
+	return (priv->nvp_list == NULL);
+}
+
+char *
+nvpair_name(nvpair_t *nvp)
+{
+	return (NVP_NAME(nvp));
+}
+
+data_type_t
+nvpair_type(nvpair_t *nvp)
+{
+	return (NVP_TYPE(nvp));
+}
+
+int
+nvpair_type_is_array(nvpair_t *nvp)
+{
+	data_type_t type = NVP_TYPE(nvp);
+
+	if ((type == DATA_TYPE_BYTE_ARRAY) ||
+	    (type == DATA_TYPE_UINT8_ARRAY) ||
+	    (type == DATA_TYPE_INT16_ARRAY) ||
+	    (type == DATA_TYPE_UINT16_ARRAY) ||
+	    (type == DATA_TYPE_INT32_ARRAY) ||
+	    (type == DATA_TYPE_UINT32_ARRAY) ||
+	    (type == DATA_TYPE_INT64_ARRAY) ||
+	    (type == DATA_TYPE_UINT64_ARRAY) ||
+	    (type == DATA_TYPE_BOOLEAN_ARRAY) ||
+	    (type == DATA_TYPE_STRING_ARRAY) ||
+	    (type == DATA_TYPE_NVLIST_ARRAY))
+		return (1);
+	return (0);
+
+}
+
+static int
+nvpair_value_common(nvpair_t *nvp, data_type_t type, uint_t *nelem, void *data)
+{
+	if (nvp == NULL || nvpair_type(nvp) != type)
+		return (EINVAL);
+
+	/*
+	 * For non-array types, we copy the data.
+	 * For array types (including string), we set a pointer.
+	 */
+	switch (type) {
+	case DATA_TYPE_BOOLEAN:
+		if (nelem != NULL)
+			*nelem = 0;
+		break;
+
+	case DATA_TYPE_BOOLEAN_VALUE:
+	case DATA_TYPE_BYTE:
+	case DATA_TYPE_INT8:
+	case DATA_TYPE_UINT8:
+	case DATA_TYPE_INT16:
+	case DATA_TYPE_UINT16:
+	case DATA_TYPE_INT32:
+	case DATA_TYPE_UINT32:
+	case DATA_TYPE_INT64:
+	case DATA_TYPE_UINT64:
+	case DATA_TYPE_HRTIME:
+#if !defined(_KERNEL)
+	case DATA_TYPE_DOUBLE:
+#endif
+		if (data == NULL)
+			return (EINVAL);
+		bcopy(NVP_VALUE(nvp), data,
+		    (size_t)i_get_value_size(type, NULL, 1));
+		if (nelem != NULL)
+			*nelem = 1;
+		break;
+
+	case DATA_TYPE_NVLIST:
+	case DATA_TYPE_STRING:
+		if (data == NULL)
+			return (EINVAL);
+		*(void **)data = (void *)NVP_VALUE(nvp);
+		if (nelem != NULL)
+			*nelem = 1;
+		break;
+
+	case DATA_TYPE_BOOLEAN_ARRAY:
+	case DATA_TYPE_BYTE_ARRAY:
+	case DATA_TYPE_INT8_ARRAY:
+	case DATA_TYPE_UINT8_ARRAY:
+	case DATA_TYPE_INT16_ARRAY:
+	case DATA_TYPE_UINT16_ARRAY:
+	case DATA_TYPE_INT32_ARRAY:
+	case DATA_TYPE_UINT32_ARRAY:
+	case DATA_TYPE_INT64_ARRAY:
+	case DATA_TYPE_UINT64_ARRAY:
+	case DATA_TYPE_STRING_ARRAY:
+	case DATA_TYPE_NVLIST_ARRAY:
+		if (nelem == NULL || data == NULL)
+			return (EINVAL);
+		if ((*nelem = NVP_NELEM(nvp)) != 0)
+			*(void **)data = (void *)NVP_VALUE(nvp);
+		else
+			*(void **)data = NULL;
+		break;
+
+	default:
+		return (ENOTSUP);
+	}
+
+	return (0);
+}
+
+static int
+nvlist_lookup_common(nvlist_t *nvl, const char *name, data_type_t type,
+    uint_t *nelem, void *data)
+{
+	nvpriv_t *priv;
+	nvpair_t *nvp;
+	i_nvp_t *curr;
+
+	if (name == NULL || nvl == NULL ||
+	    (priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv) == NULL)
+		return (EINVAL);
+
+	if (!(nvl->nvl_nvflag & (NV_UNIQUE_NAME | NV_UNIQUE_NAME_TYPE)))
+		return (ENOTSUP);
+
+	for (curr = priv->nvp_list; curr != NULL; curr = curr->nvi_next) {
+		nvp = &curr->nvi_nvp;
+
+		if (strcmp(name, NVP_NAME(nvp)) == 0 && NVP_TYPE(nvp) == type)
+			return (nvpair_value_common(nvp, type, nelem, data));
+	}
+
+	return (ENOENT);
+}
+
+int
+nvlist_lookup_boolean(nvlist_t *nvl, const char *name)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_BOOLEAN, NULL, NULL));
+}
+
+int
+nvlist_lookup_boolean_value(nvlist_t *nvl, const char *name, boolean_t *val)
+{
+	return (nvlist_lookup_common(nvl, name,
+	    DATA_TYPE_BOOLEAN_VALUE, NULL, val));
+}
+
+int
+nvlist_lookup_byte(nvlist_t *nvl, const char *name, uchar_t *val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_BYTE, NULL, val));
+}
+
+int
+nvlist_lookup_int8(nvlist_t *nvl, const char *name, int8_t *val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_INT8, NULL, val));
+}
+
+int
+nvlist_lookup_uint8(nvlist_t *nvl, const char *name, uint8_t *val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_UINT8, NULL, val));
+}
+
+int
+nvlist_lookup_int16(nvlist_t *nvl, const char *name, int16_t *val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_INT16, NULL, val));
+}
+
+int
+nvlist_lookup_uint16(nvlist_t *nvl, const char *name, uint16_t *val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_UINT16, NULL, val));
+}
+
+int
+nvlist_lookup_int32(nvlist_t *nvl, const char *name, int32_t *val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_INT32, NULL, val));
+}
+
+int
+nvlist_lookup_uint32(nvlist_t *nvl, const char *name, uint32_t *val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_UINT32, NULL, val));
+}
+
+int
+nvlist_lookup_int64(nvlist_t *nvl, const char *name, int64_t *val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_INT64, NULL, val));
+}
+
+int
+nvlist_lookup_uint64(nvlist_t *nvl, const char *name, uint64_t *val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_UINT64, NULL, val));
+}
+
+#if !defined(_KERNEL)
+int
+nvlist_lookup_double(nvlist_t *nvl, const char *name, double *val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_DOUBLE, NULL, val));
+}
+#endif
+
+int
+nvlist_lookup_string(nvlist_t *nvl, const char *name, char **val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_STRING, NULL, val));
+}
+
+int
+nvlist_lookup_nvlist(nvlist_t *nvl, const char *name, nvlist_t **val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_NVLIST, NULL, val));
+}
+
+int
+nvlist_lookup_boolean_array(nvlist_t *nvl, const char *name,
+    boolean_t **a, uint_t *n)
+{
+	return (nvlist_lookup_common(nvl, name,
+	    DATA_TYPE_BOOLEAN_ARRAY, n, a));
+}
+
+int
+nvlist_lookup_byte_array(nvlist_t *nvl, const char *name,
+    uchar_t **a, uint_t *n)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_BYTE_ARRAY, n, a));
+}
+
+int
+nvlist_lookup_int8_array(nvlist_t *nvl, const char *name, int8_t **a, uint_t *n)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_INT8_ARRAY, n, a));
+}
+
+int
+nvlist_lookup_uint8_array(nvlist_t *nvl, const char *name,
+    uint8_t **a, uint_t *n)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_UINT8_ARRAY, n, a));
+}
+
+int
+nvlist_lookup_int16_array(nvlist_t *nvl, const char *name,
+    int16_t **a, uint_t *n)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_INT16_ARRAY, n, a));
+}
+
+int
+nvlist_lookup_uint16_array(nvlist_t *nvl, const char *name,
+    uint16_t **a, uint_t *n)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_UINT16_ARRAY, n, a));
+}
+
+int
+nvlist_lookup_int32_array(nvlist_t *nvl, const char *name,
+    int32_t **a, uint_t *n)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_INT32_ARRAY, n, a));
+}
+
+int
+nvlist_lookup_uint32_array(nvlist_t *nvl, const char *name,
+    uint32_t **a, uint_t *n)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_UINT32_ARRAY, n, a));
+}
+
+int
+nvlist_lookup_int64_array(nvlist_t *nvl, const char *name,
+    int64_t **a, uint_t *n)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_INT64_ARRAY, n, a));
+}
+
+int
+nvlist_lookup_uint64_array(nvlist_t *nvl, const char *name,
+    uint64_t **a, uint_t *n)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_UINT64_ARRAY, n, a));
+}
+
+int
+nvlist_lookup_string_array(nvlist_t *nvl, const char *name,
+    char ***a, uint_t *n)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_STRING_ARRAY, n, a));
+}
+
+int
+nvlist_lookup_nvlist_array(nvlist_t *nvl, const char *name,
+    nvlist_t ***a, uint_t *n)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_NVLIST_ARRAY, n, a));
+}
+
+int
+nvlist_lookup_hrtime(nvlist_t *nvl, const char *name, hrtime_t *val)
+{
+	return (nvlist_lookup_common(nvl, name, DATA_TYPE_HRTIME, NULL, val));
+}
+
+int
+nvlist_lookup_pairs(nvlist_t *nvl, int flag, ...)
+{
+	va_list ap;
+	char *name;
+	int noentok = (flag & NV_FLAG_NOENTOK ? 1 : 0);
+	int ret = 0;
+
+	va_start(ap, flag);
+	while (ret == 0 && (name = va_arg(ap, char *)) != NULL) {
+		data_type_t type;
+		void *val;
+		uint_t *nelem;
+
+		switch (type = va_arg(ap, data_type_t)) {
+		case DATA_TYPE_BOOLEAN:
+			ret = nvlist_lookup_common(nvl, name, type, NULL, NULL);
+			break;
+
+		case DATA_TYPE_BOOLEAN_VALUE:
+		case DATA_TYPE_BYTE:
+		case DATA_TYPE_INT8:
+		case DATA_TYPE_UINT8:
+		case DATA_TYPE_INT16:
+		case DATA_TYPE_UINT16:
+		case DATA_TYPE_INT32:
+		case DATA_TYPE_UINT32:
+		case DATA_TYPE_INT64:
+		case DATA_TYPE_UINT64:
+		case DATA_TYPE_HRTIME:
+		case DATA_TYPE_STRING:
+		case DATA_TYPE_NVLIST:
+#if !defined(_KERNEL)
+		case DATA_TYPE_DOUBLE:
+#endif
+			val = va_arg(ap, void *);
+			ret = nvlist_lookup_common(nvl, name, type, NULL, val);
+			break;
+
+		case DATA_TYPE_BYTE_ARRAY:
+		case DATA_TYPE_BOOLEAN_ARRAY:
+		case DATA_TYPE_INT8_ARRAY:
+		case DATA_TYPE_UINT8_ARRAY:
+		case DATA_TYPE_INT16_ARRAY:
+		case DATA_TYPE_UINT16_ARRAY:
+		case DATA_TYPE_INT32_ARRAY:
+		case DATA_TYPE_UINT32_ARRAY:
+		case DATA_TYPE_INT64_ARRAY:
+		case DATA_TYPE_UINT64_ARRAY:
+		case DATA_TYPE_STRING_ARRAY:
+		case DATA_TYPE_NVLIST_ARRAY:
+			val = va_arg(ap, void *);
+			nelem = va_arg(ap, uint_t *);
+			ret = nvlist_lookup_common(nvl, name, type, nelem, val);
+			break;
+
+		default:
+			ret = EINVAL;
+		}
+
+		if (ret == ENOENT && noentok)
+			ret = 0;
+	}
+	va_end(ap);
+
+	return (ret);
+}
+
+/*
+ * Find the 'name'ed nvpair in the nvlist 'nvl'. If 'name' found, the function
+ * returns zero and a pointer to the matching nvpair is returned in '*ret'
+ * (given 'ret' is non-NULL). If 'sep' is specified then 'name' will penitrate
+ * multiple levels of embedded nvlists, with 'sep' as the separator. As an
+ * example, if sep is '.', name might look like: "a" or "a.b" or "a.c[3]" or
+ * "a.d[3].e[1]".  This matches the C syntax for array embed (for convience,
+ * code also supports "a.d[3]e[1]" syntax).
+ *
+ * If 'ip' is non-NULL and the last name component is an array, return the
+ * value of the "...[index]" array index in *ip. For an array reference that
+ * is not indexed, *ip will be returned as -1. If there is a syntax error in
+ * 'name', and 'ep' is non-NULL then *ep will be set to point to the location
+ * inside the 'name' string where the syntax error was detected.
+ */
+static int
+nvlist_lookup_nvpair_ei_sep(nvlist_t *nvl, const char *name, const char sep,
+    nvpair_t **ret, int *ip, char **ep)
+{
+	nvpair_t	*nvp;
+	const char	*np;
+	char		*sepp;
+	char		*idxp, *idxep;
+	nvlist_t	**nva;
+	long		idx;
+	int		n;
+
+	if (ip)
+		*ip = -1;			/* not indexed */
+	if (ep)
+		*ep = NULL;
+
+	if ((nvl == NULL) || (name == NULL))
+		return (EINVAL);
+
+	/* step through components of name */
+	for (np = name; np && *np; np = sepp) {
+		/* ensure unique names */
+		if (!(nvl->nvl_nvflag & NV_UNIQUE_NAME))
+			return (ENOTSUP);
+
+		/* skip white space */
+		skip_whitespace(np);
+		if (*np == 0)
+			break;
+
+		/* set 'sepp' to end of current component 'np' */
+		if (sep)
+			sepp = strchr(np, sep);
+		else
+			sepp = NULL;
+
+		/* find start of next "[ index ]..." */
+		idxp = strchr(np, '[');
+
+		/* if sepp comes first, set idxp to NULL */
+		if (sepp && idxp && (sepp < idxp))
+			idxp = NULL;
+
+		/*
+		 * At this point 'idxp' is set if there is an index
+		 * expected for the current component.
+		 */
+		if (idxp) {
+			/* set 'n' to length of current 'np' name component */
+			n = idxp++ - np;
+
+			/* keep sepp up to date for *ep use as we advance */
+			skip_whitespace(idxp);
+			sepp = idxp;
+
+			/* determine the index value */
+#if defined(_KERNEL) && !defined(_BOOT)
+			if (ddi_strtol(idxp, &idxep, 0, &idx))
+				goto fail;
+#else
+			idx = strtol(idxp, &idxep, 0);
+#endif
+			if (idxep == idxp)
+				goto fail;
+
+			/* keep sepp up to date for *ep use as we advance */
+			sepp = idxep;
+
+			/* skip white space index value and check for ']' */
+			skip_whitespace(sepp);
+			if (*sepp++ != ']')
+				goto fail;
+
+			/* for embedded arrays, support C syntax: "a[1].b" */
+			skip_whitespace(sepp);
+			if (sep && (*sepp == sep))
+				sepp++;
+		} else if (sepp) {
+			n = sepp++ - np;
+		} else {
+			n = strlen(np);
+		}
+
+		/* trim trailing whitespace by reducing length of 'np' */
+		if (n == 0)
+			goto fail;
+		for (n--; (np[n] == ' ') || (np[n] == '\t'); n--)
+			;
+		n++;
+
+		/* skip whitespace, and set sepp to NULL if complete */
+		if (sepp) {
+			skip_whitespace(sepp);
+			if (*sepp == 0)
+				sepp = NULL;
+		}
+
+		/*
+		 * At this point:
+		 * o  'n' is the length of current 'np' component.
+		 * o  'idxp' is set if there was an index, and value 'idx'.
+		 * o  'sepp' is set to the beginning of the next component,
+		 *    and set to NULL if we have no more components.
+		 *
+		 * Search for nvpair with matching component name.
+		 */
+		for (nvp = nvlist_next_nvpair(nvl, NULL); nvp != NULL;
+		    nvp = nvlist_next_nvpair(nvl, nvp)) {
+
+			/* continue if no match on name */
+			if (strncmp(np, nvpair_name(nvp), n) ||
+			    (strlen(nvpair_name(nvp)) != n))
+				continue;
+
+			/* if indexed, verify type is array oriented */
+			if (idxp && !nvpair_type_is_array(nvp))
+				goto fail;
+
+			/*
+			 * Full match found, return nvp and idx if this
+			 * was the last component.
+			 */
+			if (sepp == NULL) {
+				if (ret)
+					*ret = nvp;
+				if (ip && idxp)
+					*ip = (int)idx;	/* return index */
+				return (0);		/* found */
+			}
+
+			/*
+			 * More components: current match must be
+			 * of DATA_TYPE_NVLIST or DATA_TYPE_NVLIST_ARRAY
+			 * to support going deeper.
+			 */
+			if (nvpair_type(nvp) == DATA_TYPE_NVLIST) {
+				nvl = EMBEDDED_NVL(nvp);
+				break;
+			} else if (nvpair_type(nvp) == DATA_TYPE_NVLIST_ARRAY) {
+				(void) nvpair_value_nvlist_array(nvp,
+				    &nva, (uint_t *)&n);
+				if ((n < 0) || (idx >= n))
+					goto fail;
+				nvl = nva[idx];
+				break;
+			}
+
+			/* type does not support more levels */
+			goto fail;
+		}
+		if (nvp == NULL)
+			goto fail;		/* 'name' not found */
+
+		/* search for match of next component in embedded 'nvl' list */
+	}
+
+fail:	if (ep && sepp)
+		*ep = sepp;
+	return (EINVAL);
+}
+
+/*
+ * Return pointer to nvpair with specified 'name'.
+ */
+int
+nvlist_lookup_nvpair(nvlist_t *nvl, const char *name, nvpair_t **ret)
+{
+	return (nvlist_lookup_nvpair_ei_sep(nvl, name, 0, ret, NULL, NULL));
+}
+
+/*
+ * Determine if named nvpair exists in nvlist (use embedded separator of '.'
+ * and return array index).  See nvlist_lookup_nvpair_ei_sep for more detailed
+ * description.
+ */
+int nvlist_lookup_nvpair_embedded_index(nvlist_t *nvl,
+    const char *name, nvpair_t **ret, int *ip, char **ep)
+{
+	return (nvlist_lookup_nvpair_ei_sep(nvl, name, '.', ret, ip, ep));
+}
+
+boolean_t
+nvlist_exists(nvlist_t *nvl, const char *name)
+{
+	nvpriv_t *priv;
+	nvpair_t *nvp;
+	i_nvp_t *curr;
+
+	if (name == NULL || nvl == NULL ||
+	    (priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv) == NULL)
+		return (B_FALSE);
+
+	for (curr = priv->nvp_list; curr != NULL; curr = curr->nvi_next) {
+		nvp = &curr->nvi_nvp;
+
+		if (strcmp(name, NVP_NAME(nvp)) == 0)
+			return (B_TRUE);
+	}
+
+	return (B_FALSE);
+}
+
+int
+nvpair_value_boolean_value(nvpair_t *nvp, boolean_t *val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_BOOLEAN_VALUE, NULL, val));
+}
+
+int
+nvpair_value_byte(nvpair_t *nvp, uchar_t *val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_BYTE, NULL, val));
+}
+
+int
+nvpair_value_int8(nvpair_t *nvp, int8_t *val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_INT8, NULL, val));
+}
+
+int
+nvpair_value_uint8(nvpair_t *nvp, uint8_t *val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_UINT8, NULL, val));
+}
+
+int
+nvpair_value_int16(nvpair_t *nvp, int16_t *val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_INT16, NULL, val));
+}
+
+int
+nvpair_value_uint16(nvpair_t *nvp, uint16_t *val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_UINT16, NULL, val));
+}
+
+int
+nvpair_value_int32(nvpair_t *nvp, int32_t *val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_INT32, NULL, val));
+}
+
+int
+nvpair_value_uint32(nvpair_t *nvp, uint32_t *val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_UINT32, NULL, val));
+}
+
+int
+nvpair_value_int64(nvpair_t *nvp, int64_t *val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_INT64, NULL, val));
+}
+
+int
+nvpair_value_uint64(nvpair_t *nvp, uint64_t *val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_UINT64, NULL, val));
+}
+
+#if !defined(_KERNEL)
+int
+nvpair_value_double(nvpair_t *nvp, double *val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_DOUBLE, NULL, val));
+}
+#endif
+
+int
+nvpair_value_string(nvpair_t *nvp, char **val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_STRING, NULL, val));
+}
+
+int
+nvpair_value_nvlist(nvpair_t *nvp, nvlist_t **val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_NVLIST, NULL, val));
+}
+
+int
+nvpair_value_boolean_array(nvpair_t *nvp, boolean_t **val, uint_t *nelem)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_BOOLEAN_ARRAY, nelem, val));
+}
+
+int
+nvpair_value_byte_array(nvpair_t *nvp, uchar_t **val, uint_t *nelem)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_BYTE_ARRAY, nelem, val));
+}
+
+int
+nvpair_value_int8_array(nvpair_t *nvp, int8_t **val, uint_t *nelem)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_INT8_ARRAY, nelem, val));
+}
+
+int
+nvpair_value_uint8_array(nvpair_t *nvp, uint8_t **val, uint_t *nelem)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_UINT8_ARRAY, nelem, val));
+}
+
+int
+nvpair_value_int16_array(nvpair_t *nvp, int16_t **val, uint_t *nelem)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_INT16_ARRAY, nelem, val));
+}
+
+int
+nvpair_value_uint16_array(nvpair_t *nvp, uint16_t **val, uint_t *nelem)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_UINT16_ARRAY, nelem, val));
+}
+
+int
+nvpair_value_int32_array(nvpair_t *nvp, int32_t **val, uint_t *nelem)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_INT32_ARRAY, nelem, val));
+}
+
+int
+nvpair_value_uint32_array(nvpair_t *nvp, uint32_t **val, uint_t *nelem)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_UINT32_ARRAY, nelem, val));
+}
+
+int
+nvpair_value_int64_array(nvpair_t *nvp, int64_t **val, uint_t *nelem)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_INT64_ARRAY, nelem, val));
+}
+
+int
+nvpair_value_uint64_array(nvpair_t *nvp, uint64_t **val, uint_t *nelem)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_UINT64_ARRAY, nelem, val));
+}
+
+int
+nvpair_value_string_array(nvpair_t *nvp, char ***val, uint_t *nelem)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_STRING_ARRAY, nelem, val));
+}
+
+int
+nvpair_value_nvlist_array(nvpair_t *nvp, nvlist_t ***val, uint_t *nelem)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_NVLIST_ARRAY, nelem, val));
+}
+
+int
+nvpair_value_hrtime(nvpair_t *nvp, hrtime_t *val)
+{
+	return (nvpair_value_common(nvp, DATA_TYPE_HRTIME, NULL, val));
+}
+
+/*
+ * Add specified pair to the list.
+ */
+int
+nvlist_add_nvpair(nvlist_t *nvl, nvpair_t *nvp)
+{
+	if (nvl == NULL || nvp == NULL)
+		return (EINVAL);
+
+	return (nvlist_add_common(nvl, NVP_NAME(nvp), NVP_TYPE(nvp),
+	    NVP_NELEM(nvp), NVP_VALUE(nvp)));
+}
+
+/*
+ * Merge the supplied nvlists and put the result in dst.
+ * The merged list will contain all names specified in both lists,
+ * the values are taken from nvl in the case of duplicates.
+ * Return 0 on success.
+ */
+/*ARGSUSED*/
+int
+nvlist_merge(nvlist_t *dst, nvlist_t *nvl, int flag)
+{
+	if (nvl == NULL || dst == NULL)
+		return (EINVAL);
+
+	if (dst != nvl)
+		return (nvlist_copy_pairs(nvl, dst));
+
+	return (0);
+}
+
+/*
+ * Encoding related routines
+ */
+#define	NVS_OP_ENCODE	0
+#define	NVS_OP_DECODE	1
+#define	NVS_OP_GETSIZE	2
+
+typedef struct nvs_ops nvs_ops_t;
+
+typedef struct {
+	int		nvs_op;
+	const nvs_ops_t	*nvs_ops;
+	void		*nvs_private;
+	nvpriv_t	*nvs_priv;
+} nvstream_t;
+
+/*
+ * nvs operations are:
+ *   - nvs_nvlist
+ *     encoding / decoding of a nvlist header (nvlist_t)
+ *     calculates the size used for header and end detection
+ *
+ *   - nvs_nvpair
+ *     responsible for the first part of encoding / decoding of an nvpair
+ *     calculates the decoded size of an nvpair
+ *
+ *   - nvs_nvp_op
+ *     second part of encoding / decoding of an nvpair
+ *
+ *   - nvs_nvp_size
+ *     calculates the encoding size of an nvpair
+ *
+ *   - nvs_nvl_fini
+ *     encodes the end detection mark (zeros).
+ */
+struct nvs_ops {
+	int (*nvs_nvlist)(nvstream_t *, nvlist_t *, size_t *);
+	int (*nvs_nvpair)(nvstream_t *, nvpair_t *, size_t *);
+	int (*nvs_nvp_op)(nvstream_t *, nvpair_t *);
+	int (*nvs_nvp_size)(nvstream_t *, nvpair_t *, size_t *);
+	int (*nvs_nvl_fini)(nvstream_t *);
+};
+
+typedef struct {
+	char	nvh_encoding;	/* nvs encoding method */
+	char	nvh_endian;	/* nvs endian */
+	char	nvh_reserved1;	/* reserved for future use */
+	char	nvh_reserved2;	/* reserved for future use */
+} nvs_header_t;
+
+static int
+nvs_encode_pairs(nvstream_t *nvs, nvlist_t *nvl)
+{
+	nvpriv_t *priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv;
+	i_nvp_t *curr;
+
+	/*
+	 * Walk nvpair in list and encode each nvpair
+	 */
+	for (curr = priv->nvp_list; curr != NULL; curr = curr->nvi_next)
+		if (nvs->nvs_ops->nvs_nvpair(nvs, &curr->nvi_nvp, NULL) != 0)
+			return (EFAULT);
+
+	return (nvs->nvs_ops->nvs_nvl_fini(nvs));
+}
+
+static int
+nvs_decode_pairs(nvstream_t *nvs, nvlist_t *nvl)
+{
+	nvpair_t *nvp;
+	size_t nvsize;
+	int err;
+
+	/*
+	 * Get decoded size of next pair in stream, alloc
+	 * memory for nvpair_t, then decode the nvpair
+	 */
+	while ((err = nvs->nvs_ops->nvs_nvpair(nvs, NULL, &nvsize)) == 0) {
+		if (nvsize == 0) /* end of list */
+			break;
+
+		/* make sure len makes sense */
+		if (nvsize < NVP_SIZE_CALC(1, 0))
+			return (EFAULT);
+
+		if ((nvp = nvp_buf_alloc(nvl, nvsize)) == NULL)
+			return (ENOMEM);
+
+		if ((err = nvs->nvs_ops->nvs_nvp_op(nvs, nvp)) != 0) {
+			nvp_buf_free(nvl, nvp);
+			return (err);
+		}
+
+		if (i_validate_nvpair(nvp) != 0) {
+			nvpair_free(nvp);
+			nvp_buf_free(nvl, nvp);
+			return (EFAULT);
+		}
+
+		nvp_buf_link(nvl, nvp);
+	}
+	return (err);
+}
+
+static int
+nvs_getsize_pairs(nvstream_t *nvs, nvlist_t *nvl, size_t *buflen)
+{
+	nvpriv_t *priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv;
+	i_nvp_t *curr;
+	uint64_t nvsize = *buflen;
+	size_t size;
+
+	/*
+	 * Get encoded size of nvpairs in nvlist
+	 */
+	for (curr = priv->nvp_list; curr != NULL; curr = curr->nvi_next) {
+		if (nvs->nvs_ops->nvs_nvp_size(nvs, &curr->nvi_nvp, &size) != 0)
+			return (EINVAL);
+
+		if ((nvsize += size) > INT32_MAX)
+			return (EINVAL);
+	}
+
+	*buflen = nvsize;
+	return (0);
+}
+
+static int
+nvs_operation(nvstream_t *nvs, nvlist_t *nvl, size_t *buflen)
+{
+	int err;
+
+	if (nvl->nvl_priv == 0)
+		return (EFAULT);
+
+	/*
+	 * Perform the operation, starting with header, then each nvpair
+	 */
+	if ((err = nvs->nvs_ops->nvs_nvlist(nvs, nvl, buflen)) != 0)
+		return (err);
+
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE:
+		err = nvs_encode_pairs(nvs, nvl);
+		break;
+
+	case NVS_OP_DECODE:
+		err = nvs_decode_pairs(nvs, nvl);
+		break;
+
+	case NVS_OP_GETSIZE:
+		err = nvs_getsize_pairs(nvs, nvl, buflen);
+		break;
+
+	default:
+		err = EINVAL;
+	}
+
+	return (err);
+}
+
+static int
+nvs_embedded(nvstream_t *nvs, nvlist_t *embedded)
+{
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE:
+		return (nvs_operation(nvs, embedded, NULL));
+
+	case NVS_OP_DECODE: {
+		nvpriv_t *priv;
+		int err;
+
+		if (embedded->nvl_version != NV_VERSION)
+			return (ENOTSUP);
+
+		if ((priv = nv_priv_alloc_embedded(nvs->nvs_priv)) == NULL)
+			return (ENOMEM);
+
+		nvlist_init(embedded, embedded->nvl_nvflag, priv);
+
+		if ((err = nvs_operation(nvs, embedded, NULL)) != 0)
+			nvlist_free(embedded);
+		return (err);
+	}
+	default:
+		break;
+	}
+
+	return (EINVAL);
+}
+
+static int
+nvs_embedded_nvl_array(nvstream_t *nvs, nvpair_t *nvp, size_t *size)
+{
+	size_t nelem = NVP_NELEM(nvp);
+	nvlist_t **nvlp = EMBEDDED_NVL_ARRAY(nvp);
+	int i;
+
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE:
+		for (i = 0; i < nelem; i++)
+			if (nvs_embedded(nvs, nvlp[i]) != 0)
+				return (EFAULT);
+		break;
+
+	case NVS_OP_DECODE: {
+		size_t len = nelem * sizeof (uint64_t);
+		nvlist_t *embedded = (nvlist_t *)((uintptr_t)nvlp + len);
+
+		bzero(nvlp, len);	/* don't trust packed data */
+		for (i = 0; i < nelem; i++) {
+			if (nvs_embedded(nvs, embedded) != 0) {
+				nvpair_free(nvp);
+				return (EFAULT);
+			}
+
+			nvlp[i] = embedded++;
+		}
+		break;
+	}
+	case NVS_OP_GETSIZE: {
+		uint64_t nvsize = 0;
+
+		for (i = 0; i < nelem; i++) {
+			size_t nvp_sz = 0;
+
+			if (nvs_operation(nvs, nvlp[i], &nvp_sz) != 0)
+				return (EINVAL);
+
+			if ((nvsize += nvp_sz) > INT32_MAX)
+				return (EINVAL);
+		}
+
+		*size = nvsize;
+		break;
+	}
+	default:
+		return (EINVAL);
+	}
+
+	return (0);
+}
+
+static int nvs_native(nvstream_t *, nvlist_t *, char *, size_t *);
+static int nvs_xdr(nvstream_t *, nvlist_t *, char *, size_t *);
+
+/*
+ * Common routine for nvlist operations:
+ * encode, decode, getsize (encoded size).
+ */
+static int
+nvlist_common(nvlist_t *nvl, char *buf, size_t *buflen, int encoding,
+    int nvs_op)
+{
+	int err = 0;
+	nvstream_t nvs;
+	int nvl_endian;
+#ifdef	_LITTLE_ENDIAN
+	int host_endian = 1;
+#else
+	int host_endian = 0;
+#endif	/* _LITTLE_ENDIAN */
+	nvs_header_t *nvh = (void *)buf;
+
+	if (buflen == NULL || nvl == NULL ||
+	    (nvs.nvs_priv = (nvpriv_t *)(uintptr_t)nvl->nvl_priv) == NULL)
+		return (EINVAL);
+
+	nvs.nvs_op = nvs_op;
+
+	/*
+	 * For NVS_OP_ENCODE and NVS_OP_DECODE make sure an nvlist and
+	 * a buffer is allocated.  The first 4 bytes in the buffer are
+	 * used for encoding method and host endian.
+	 */
+	switch (nvs_op) {
+	case NVS_OP_ENCODE:
+		if (buf == NULL || *buflen < sizeof (nvs_header_t))
+			return (EINVAL);
+
+		nvh->nvh_encoding = encoding;
+		nvh->nvh_endian = nvl_endian = host_endian;
+		nvh->nvh_reserved1 = 0;
+		nvh->nvh_reserved2 = 0;
+		break;
+
+	case NVS_OP_DECODE:
+		if (buf == NULL || *buflen < sizeof (nvs_header_t))
+			return (EINVAL);
+
+		/* get method of encoding from first byte */
+		encoding = nvh->nvh_encoding;
+		nvl_endian = nvh->nvh_endian;
+		break;
+
+	case NVS_OP_GETSIZE:
+		nvl_endian = host_endian;
+
+		/*
+		 * add the size for encoding
+		 */
+		*buflen = sizeof (nvs_header_t);
+		break;
+
+	default:
+		return (ENOTSUP);
+	}
+
+	/*
+	 * Create an nvstream with proper encoding method
+	 */
+	switch (encoding) {
+	case NV_ENCODE_NATIVE:
+		/*
+		 * check endianness, in case we are unpacking
+		 * from a file
+		 */
+		if (nvl_endian != host_endian)
+			return (ENOTSUP);
+		err = nvs_native(&nvs, nvl, buf, buflen);
+		break;
+	case NV_ENCODE_XDR:
+		err = nvs_xdr(&nvs, nvl, buf, buflen);
+		break;
+	default:
+		err = ENOTSUP;
+		break;
+	}
+
+	return (err);
+}
+
+int
+nvlist_size(nvlist_t *nvl, size_t *size, int encoding)
+{
+	return (nvlist_common(nvl, NULL, size, encoding, NVS_OP_GETSIZE));
+}
+
+/*
+ * Pack nvlist into contiguous memory
+ */
+/*ARGSUSED1*/
+int
+nvlist_pack(nvlist_t *nvl, char **bufp, size_t *buflen, int encoding,
+    int kmflag)
+{
+#if defined(_KERNEL) && !defined(_BOOT)
+	return (nvlist_xpack(nvl, bufp, buflen, encoding,
+	    (kmflag == KM_SLEEP ? nv_alloc_sleep : nv_alloc_nosleep)));
+#else
+	return (nvlist_xpack(nvl, bufp, buflen, encoding, nv_alloc_nosleep));
+#endif
+}
+
+int
+nvlist_xpack(nvlist_t *nvl, char **bufp, size_t *buflen, int encoding,
+    nv_alloc_t *nva)
+{
+	nvpriv_t nvpriv;
+	size_t alloc_size;
+	char *buf;
+	int err;
+
+	if (nva == NULL || nvl == NULL || bufp == NULL || buflen == NULL)
+		return (EINVAL);
+
+	if (*bufp != NULL)
+		return (nvlist_common(nvl, *bufp, buflen, encoding,
+		    NVS_OP_ENCODE));
+
+	/*
+	 * Here is a difficult situation:
+	 * 1. The nvlist has fixed allocator properties.
+	 *    All other nvlist routines (like nvlist_add_*, ...) use
+	 *    these properties.
+	 * 2. When using nvlist_pack() the user can specify his own
+	 *    allocator properties (e.g. by using KM_NOSLEEP).
+	 *
+	 * We use the user specified properties (2). A clearer solution
+	 * will be to remove the kmflag from nvlist_pack(), but we will
+	 * not change the interface.
+	 */
+	nv_priv_init(&nvpriv, nva, 0);
+
+	if (err = nvlist_size(nvl, &alloc_size, encoding))
+		return (err);
+
+	if ((buf = nv_mem_zalloc(&nvpriv, alloc_size)) == NULL)
+		return (ENOMEM);
+
+	if ((err = nvlist_common(nvl, buf, &alloc_size, encoding,
+	    NVS_OP_ENCODE)) != 0) {
+		nv_mem_free(&nvpriv, buf, alloc_size);
+	} else {
+		*buflen = alloc_size;
+		*bufp = buf;
+	}
+
+	return (err);
+}
+
+/*
+ * Unpack buf into an nvlist_t
+ */
+/*ARGSUSED1*/
+int
+nvlist_unpack(char *buf, size_t buflen, nvlist_t **nvlp, int kmflag)
+{
+#if defined(_KERNEL) && !defined(_BOOT)
+	return (nvlist_xunpack(buf, buflen, nvlp,
+	    (kmflag == KM_SLEEP ? nv_alloc_sleep : nv_alloc_nosleep)));
+#else
+	return (nvlist_xunpack(buf, buflen, nvlp, nv_alloc_nosleep));
+#endif
+}
+
+int
+nvlist_xunpack(char *buf, size_t buflen, nvlist_t **nvlp, nv_alloc_t *nva)
+{
+	nvlist_t *nvl;
+	int err;
+
+	if (nvlp == NULL)
+		return (EINVAL);
+
+	if ((err = nvlist_xalloc(&nvl, 0, nva)) != 0)
+		return (err);
+
+	if ((err = nvlist_common(nvl, buf, &buflen, 0, NVS_OP_DECODE)) != 0)
+		nvlist_free(nvl);
+	else
+		*nvlp = nvl;
+
+	return (err);
+}
+
+/*
+ * Native encoding functions
+ */
+typedef struct {
+	/*
+	 * This structure is used when decoding a packed nvpair in
+	 * the native format.  n_base points to a buffer containing the
+	 * packed nvpair.  n_end is a pointer to the end of the buffer.
+	 * (n_end actually points to the first byte past the end of the
+	 * buffer.)  n_curr is a pointer that lies between n_base and n_end.
+	 * It points to the current data that we are decoding.
+	 * The amount of data left in the buffer is equal to n_end - n_curr.
+	 * n_flag is used to recognize a packed embedded list.
+	 */
+	caddr_t n_base;
+	caddr_t n_end;
+	caddr_t n_curr;
+	uint_t  n_flag;
+} nvs_native_t;
+
+static int
+nvs_native_create(nvstream_t *nvs, nvs_native_t *native, char *buf,
+    size_t buflen)
+{
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE:
+	case NVS_OP_DECODE:
+		nvs->nvs_private = native;
+		native->n_curr = native->n_base = buf;
+		native->n_end = buf + buflen;
+		native->n_flag = 0;
+		return (0);
+
+	case NVS_OP_GETSIZE:
+		nvs->nvs_private = native;
+		native->n_curr = native->n_base = native->n_end = NULL;
+		native->n_flag = 0;
+		return (0);
+	default:
+		return (EINVAL);
+	}
+}
+
+/*ARGSUSED*/
+static void
+nvs_native_destroy(nvstream_t *nvs)
+{
+}
+
+static int
+native_cp(nvstream_t *nvs, void *buf, size_t size)
+{
+	nvs_native_t *native = (nvs_native_t *)nvs->nvs_private;
+
+	if (native->n_curr + size > native->n_end)
+		return (EFAULT);
+
+	/*
+	 * The bcopy() below eliminates alignment requirement
+	 * on the buffer (stream) and is preferred over direct access.
+	 */
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE:
+		bcopy(buf, native->n_curr, size);
+		break;
+	case NVS_OP_DECODE:
+		bcopy(native->n_curr, buf, size);
+		break;
+	default:
+		return (EINVAL);
+	}
+
+	native->n_curr += size;
+	return (0);
+}
+
+/*
+ * operate on nvlist_t header
+ */
+static int
+nvs_native_nvlist(nvstream_t *nvs, nvlist_t *nvl, size_t *size)
+{
+	nvs_native_t *native = nvs->nvs_private;
+
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE:
+	case NVS_OP_DECODE:
+		if (native->n_flag)
+			return (0);	/* packed embedded list */
+
+		native->n_flag = 1;
+
+		/* copy version and nvflag of the nvlist_t */
+		if (native_cp(nvs, &nvl->nvl_version, sizeof (int32_t)) != 0 ||
+		    native_cp(nvs, &nvl->nvl_nvflag, sizeof (int32_t)) != 0)
+			return (EFAULT);
+
+		return (0);
+
+	case NVS_OP_GETSIZE:
+		/*
+		 * if calculate for packed embedded list
+		 * 	4 for end of the embedded list
+		 * else
+		 * 	2 * sizeof (int32_t) for nvl_version and nvl_nvflag
+		 * 	and 4 for end of the entire list
+		 */
+		if (native->n_flag) {
+			*size += 4;
+		} else {
+			native->n_flag = 1;
+			*size += 2 * sizeof (int32_t) + 4;
+		}
+
+		return (0);
+
+	default:
+		return (EINVAL);
+	}
+}
+
+static int
+nvs_native_nvl_fini(nvstream_t *nvs)
+{
+	if (nvs->nvs_op == NVS_OP_ENCODE) {
+		nvs_native_t *native = (nvs_native_t *)nvs->nvs_private;
+		/*
+		 * Add 4 zero bytes at end of nvlist. They are used
+		 * for end detection by the decode routine.
+		 */
+		if (native->n_curr + sizeof (int) > native->n_end)
+			return (EFAULT);
+
+		bzero(native->n_curr, sizeof (int));
+		native->n_curr += sizeof (int);
+	}
+
+	return (0);
+}
+
+static int
+nvpair_native_embedded(nvstream_t *nvs, nvpair_t *nvp)
+{
+	if (nvs->nvs_op == NVS_OP_ENCODE) {
+		nvs_native_t *native = (nvs_native_t *)nvs->nvs_private;
+		nvlist_t *packed = (void *)
+		    (native->n_curr - nvp->nvp_size + NVP_VALOFF(nvp));
+		/*
+		 * Null out the pointer that is meaningless in the packed
+		 * structure. The address may not be aligned, so we have
+		 * to use bzero.
+		 */
+		bzero(&packed->nvl_priv, sizeof (packed->nvl_priv));
+	}
+
+	return (nvs_embedded(nvs, EMBEDDED_NVL(nvp)));
+}
+
+static int
+nvpair_native_embedded_array(nvstream_t *nvs, nvpair_t *nvp)
+{
+	if (nvs->nvs_op == NVS_OP_ENCODE) {
+		nvs_native_t *native = (nvs_native_t *)nvs->nvs_private;
+		char *value = native->n_curr - nvp->nvp_size + NVP_VALOFF(nvp);
+		size_t len = NVP_NELEM(nvp) * sizeof (uint64_t);
+		nvlist_t *packed = (nvlist_t *)((uintptr_t)value + len);
+		int i;
+		/*
+		 * Null out pointers that are meaningless in the packed
+		 * structure. The addresses may not be aligned, so we have
+		 * to use bzero.
+		 */
+		bzero(value, len);
+
+		for (i = 0; i < NVP_NELEM(nvp); i++, packed++)
+			/*
+			 * Null out the pointer that is meaningless in the
+			 * packed structure. The address may not be aligned,
+			 * so we have to use bzero.
+			 */
+			bzero(&packed->nvl_priv, sizeof (packed->nvl_priv));
+	}
+
+	return (nvs_embedded_nvl_array(nvs, nvp, NULL));
+}
+
+static void
+nvpair_native_string_array(nvstream_t *nvs, nvpair_t *nvp)
+{
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE: {
+		nvs_native_t *native = (nvs_native_t *)nvs->nvs_private;
+		uint64_t *strp = (void *)
+		    (native->n_curr - nvp->nvp_size + NVP_VALOFF(nvp));
+		/*
+		 * Null out pointers that are meaningless in the packed
+		 * structure. The addresses may not be aligned, so we have
+		 * to use bzero.
+		 */
+		bzero(strp, NVP_NELEM(nvp) * sizeof (uint64_t));
+		break;
+	}
+	case NVS_OP_DECODE: {
+		char **strp = (void *)NVP_VALUE(nvp);
+		char *buf = ((char *)strp + NVP_NELEM(nvp) * sizeof (uint64_t));
+		int i;
+
+		for (i = 0; i < NVP_NELEM(nvp); i++) {
+			strp[i] = buf;
+			buf += strlen(buf) + 1;
+		}
+		break;
+	}
+	}
+}
+
+static int
+nvs_native_nvp_op(nvstream_t *nvs, nvpair_t *nvp)
+{
+	data_type_t type;
+	int value_sz;
+	int ret = 0;
+
+	/*
+	 * We do the initial bcopy of the data before we look at
+	 * the nvpair type, because when we're decoding, we won't
+	 * have the correct values for the pair until we do the bcopy.
+	 */
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE:
+	case NVS_OP_DECODE:
+		if (native_cp(nvs, nvp, nvp->nvp_size) != 0)
+			return (EFAULT);
+		break;
+	default:
+		return (EINVAL);
+	}
+
+	/* verify nvp_name_sz, check the name string length */
+	if (i_validate_nvpair_name(nvp) != 0)
+		return (EFAULT);
+
+	type = NVP_TYPE(nvp);
+
+	/*
+	 * Verify type and nelem and get the value size.
+	 * In case of data types DATA_TYPE_STRING and DATA_TYPE_STRING_ARRAY
+	 * is the size of the string(s) excluded.
+	 */
+	if ((value_sz = i_get_value_size(type, NULL, NVP_NELEM(nvp))) < 0)
+		return (EFAULT);
+
+	if (NVP_SIZE_CALC(nvp->nvp_name_sz, value_sz) > nvp->nvp_size)
+		return (EFAULT);
+
+	switch (type) {
+	case DATA_TYPE_NVLIST:
+		ret = nvpair_native_embedded(nvs, nvp);
+		break;
+	case DATA_TYPE_NVLIST_ARRAY:
+		ret = nvpair_native_embedded_array(nvs, nvp);
+		break;
+	case DATA_TYPE_STRING_ARRAY:
+		nvpair_native_string_array(nvs, nvp);
+		break;
+	default:
+		break;
+	}
+
+	return (ret);
+}
+
+static int
+nvs_native_nvp_size(nvstream_t *nvs, nvpair_t *nvp, size_t *size)
+{
+	uint64_t nvp_sz = nvp->nvp_size;
+
+	switch (NVP_TYPE(nvp)) {
+	case DATA_TYPE_NVLIST: {
+		size_t nvsize = 0;
+
+		if (nvs_operation(nvs, EMBEDDED_NVL(nvp), &nvsize) != 0)
+			return (EINVAL);
+
+		nvp_sz += nvsize;
+		break;
+	}
+	case DATA_TYPE_NVLIST_ARRAY: {
+		size_t nvsize;
+
+		if (nvs_embedded_nvl_array(nvs, nvp, &nvsize) != 0)
+			return (EINVAL);
+
+		nvp_sz += nvsize;
+		break;
+	}
+	default:
+		break;
+	}
+
+	if (nvp_sz > INT32_MAX)
+		return (EINVAL);
+
+	*size = nvp_sz;
+
+	return (0);
+}
+
+static int
+nvs_native_nvpair(nvstream_t *nvs, nvpair_t *nvp, size_t *size)
+{
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE:
+		return (nvs_native_nvp_op(nvs, nvp));
+
+	case NVS_OP_DECODE: {
+		nvs_native_t *native = (nvs_native_t *)nvs->nvs_private;
+		int32_t decode_len;
+
+		/* try to read the size value from the stream */
+		if (native->n_curr + sizeof (int32_t) > native->n_end)
+			return (EFAULT);
+		bcopy(native->n_curr, &decode_len, sizeof (int32_t));
+
+		/* sanity check the size value */
+		if (decode_len < 0 ||
+		    decode_len > native->n_end - native->n_curr)
+			return (EFAULT);
+
+		*size = decode_len;
+
+		/*
+		 * If at the end of the stream then move the cursor
+		 * forward, otherwise nvpair_native_op() will read
+		 * the entire nvpair at the same cursor position.
+		 */
+		if (*size == 0)
+			native->n_curr += sizeof (int32_t);
+		break;
+	}
+
+	default:
+		return (EINVAL);
+	}
+
+	return (0);
+}
+
+static const nvs_ops_t nvs_native_ops = {
+	nvs_native_nvlist,
+	nvs_native_nvpair,
+	nvs_native_nvp_op,
+	nvs_native_nvp_size,
+	nvs_native_nvl_fini
+};
+
+static int
+nvs_native(nvstream_t *nvs, nvlist_t *nvl, char *buf, size_t *buflen)
+{
+	nvs_native_t native;
+	int err;
+
+	nvs->nvs_ops = &nvs_native_ops;
+
+	if ((err = nvs_native_create(nvs, &native, buf + sizeof (nvs_header_t),
+	    *buflen - sizeof (nvs_header_t))) != 0)
+		return (err);
+
+	err = nvs_operation(nvs, nvl, buflen);
+
+	nvs_native_destroy(nvs);
+
+	return (err);
+}
+
+/*
+ * XDR encoding functions
+ *
+ * An xdr packed nvlist is encoded as:
+ *
+ *  - encoding methode and host endian (4 bytes)
+ *  - nvl_version (4 bytes)
+ *  - nvl_nvflag (4 bytes)
+ *
+ *  - encoded nvpairs, the format of one xdr encoded nvpair is:
+ *	- encoded size of the nvpair (4 bytes)
+ *	- decoded size of the nvpair (4 bytes)
+ *	- name string, (4 + sizeof(NV_ALIGN4(string))
+ *	  a string is coded as size (4 bytes) and data
+ *	- data type (4 bytes)
+ *	- number of elements in the nvpair (4 bytes)
+ *	- data
+ *
+ *  - 2 zero's for end of the entire list (8 bytes)
+ */
+static int
+nvs_xdr_create(nvstream_t *nvs, XDR *xdr, char *buf, size_t buflen)
+{
+	/* xdr data must be 4 byte aligned */
+	if ((ulong_t)buf % 4 != 0)
+		return (EFAULT);
+
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE:
+		xdrmem_create(xdr, buf, (uint_t)buflen, XDR_ENCODE);
+		nvs->nvs_private = xdr;
+		return (0);
+	case NVS_OP_DECODE:
+		xdrmem_create(xdr, buf, (uint_t)buflen, XDR_DECODE);
+		nvs->nvs_private = xdr;
+		return (0);
+	case NVS_OP_GETSIZE:
+		nvs->nvs_private = NULL;
+		return (0);
+	default:
+		return (EINVAL);
+	}
+}
+
+static void
+nvs_xdr_destroy(nvstream_t *nvs)
+{
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE:
+	case NVS_OP_DECODE:
+		xdr_destroy((XDR *)nvs->nvs_private);
+		break;
+	default:
+		break;
+	}
+}
+
+static int
+nvs_xdr_nvlist(nvstream_t *nvs, nvlist_t *nvl, size_t *size)
+{
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE:
+	case NVS_OP_DECODE: {
+		XDR 	*xdr = nvs->nvs_private;
+
+		if (!xdr_int(xdr, &nvl->nvl_version) ||
+		    !xdr_u_int(xdr, &nvl->nvl_nvflag))
+			return (EFAULT);
+		break;
+	}
+	case NVS_OP_GETSIZE: {
+		/*
+		 * 2 * 4 for nvl_version + nvl_nvflag
+		 * and 8 for end of the entire list
+		 */
+		*size += 2 * 4 + 8;
+		break;
+	}
+	default:
+		return (EINVAL);
+	}
+	return (0);
+}
+
+static int
+nvs_xdr_nvl_fini(nvstream_t *nvs)
+{
+	if (nvs->nvs_op == NVS_OP_ENCODE) {
+		XDR *xdr = nvs->nvs_private;
+		int zero = 0;
+
+		if (!xdr_int(xdr, &zero) || !xdr_int(xdr, &zero))
+			return (EFAULT);
+	}
+
+	return (0);
+}
+
+/*
+ * The format of xdr encoded nvpair is:
+ * encode_size, decode_size, name string, data type, nelem, data
+ */
+static int
+nvs_xdr_nvp_op(nvstream_t *nvs, nvpair_t *nvp)
+{
+	data_type_t type;
+	char	*buf;
+	char	*buf_end = (char *)nvp + nvp->nvp_size;
+	int	value_sz;
+	uint_t	nelem, buflen;
+	bool_t	ret = FALSE;
+	XDR	*xdr = nvs->nvs_private;
+
+	ASSERT(xdr != NULL && nvp != NULL);
+
+	/* name string */
+	if ((buf = NVP_NAME(nvp)) >= buf_end)
+		return (EFAULT);
+	buflen = buf_end - buf;
+
+	if (!xdr_string(xdr, &buf, buflen - 1))
+		return (EFAULT);
+	nvp->nvp_name_sz = strlen(buf) + 1;
+
+	/* type and nelem */
+	if (!xdr_int(xdr, (int *)&nvp->nvp_type) ||
+	    !xdr_int(xdr, &nvp->nvp_value_elem))
+		return (EFAULT);
+
+	type = NVP_TYPE(nvp);
+	nelem = nvp->nvp_value_elem;
+
+	/*
+	 * Verify type and nelem and get the value size.
+	 * In case of data types DATA_TYPE_STRING and DATA_TYPE_STRING_ARRAY
+	 * is the size of the string(s) excluded.
+	 */
+	if ((value_sz = i_get_value_size(type, NULL, nelem)) < 0)
+		return (EFAULT);
+
+	/* if there is no data to extract then return */
+	if (nelem == 0)
+		return (0);
+
+	/* value */
+	if ((buf = NVP_VALUE(nvp)) >= buf_end)
+		return (EFAULT);
+	buflen = buf_end - buf;
+
+	if (buflen < value_sz)
+		return (EFAULT);
+
+	switch (type) {
+	case DATA_TYPE_NVLIST:
+		if (nvs_embedded(nvs, (void *)buf) == 0)
+			return (0);
+		break;
+
+	case DATA_TYPE_NVLIST_ARRAY:
+		if (nvs_embedded_nvl_array(nvs, nvp, NULL) == 0)
+			return (0);
+		break;
+
+	case DATA_TYPE_BOOLEAN:
+		ret = TRUE;
+		break;
+
+	case DATA_TYPE_BYTE:
+	case DATA_TYPE_INT8:
+	case DATA_TYPE_UINT8:
+		ret = xdr_char(xdr, buf);
+		break;
+
+	case DATA_TYPE_INT16:
+		ret = xdr_short(xdr, (void *)buf);
+		break;
+
+	case DATA_TYPE_UINT16:
+		ret = xdr_u_short(xdr, (void *)buf);
+		break;
+
+	case DATA_TYPE_BOOLEAN_VALUE:
+	case DATA_TYPE_INT32:
+		ret = xdr_int(xdr, (void *)buf);
+		break;
+
+	case DATA_TYPE_UINT32:
+		ret = xdr_u_int(xdr, (void *)buf);
+		break;
+
+	case DATA_TYPE_INT64:
+		ret = xdr_longlong_t(xdr, (void *)buf);
+		break;
+
+	case DATA_TYPE_UINT64:
+		ret = xdr_u_longlong_t(xdr, (void *)buf);
+		break;
+
+	case DATA_TYPE_HRTIME:
+		/*
+		 * NOTE: must expose the definition of hrtime_t here
+		 */
+		ret = xdr_longlong_t(xdr, (void *)buf);
+		break;
+#if !defined(_KERNEL)
+	case DATA_TYPE_DOUBLE:
+		ret = xdr_double(xdr, (void *)buf);
+		break;
+#endif
+	case DATA_TYPE_STRING:
+		ret = xdr_string(xdr, &buf, buflen - 1);
+		break;
+
+	case DATA_TYPE_BYTE_ARRAY:
+		ret = xdr_opaque(xdr, buf, nelem);
+		break;
+
+	case DATA_TYPE_INT8_ARRAY:
+	case DATA_TYPE_UINT8_ARRAY:
+		ret = xdr_array(xdr, &buf, &nelem, buflen, sizeof (int8_t),
+		    (xdrproc_t)xdr_char);
+		break;
+
+	case DATA_TYPE_INT16_ARRAY:
+		ret = xdr_array(xdr, &buf, &nelem, buflen / sizeof (int16_t),
+		    sizeof (int16_t), (xdrproc_t)xdr_short);
+		break;
+
+	case DATA_TYPE_UINT16_ARRAY:
+		ret = xdr_array(xdr, &buf, &nelem, buflen / sizeof (uint16_t),
+		    sizeof (uint16_t), (xdrproc_t)xdr_u_short);
+		break;
+
+	case DATA_TYPE_BOOLEAN_ARRAY:
+	case DATA_TYPE_INT32_ARRAY:
+		ret = xdr_array(xdr, &buf, &nelem, buflen / sizeof (int32_t),
+		    sizeof (int32_t), (xdrproc_t)xdr_int);
+		break;
+
+	case DATA_TYPE_UINT32_ARRAY:
+		ret = xdr_array(xdr, &buf, &nelem, buflen / sizeof (uint32_t),
+		    sizeof (uint32_t), (xdrproc_t)xdr_u_int);
+		break;
+
+	case DATA_TYPE_INT64_ARRAY:
+		ret = xdr_array(xdr, &buf, &nelem, buflen / sizeof (int64_t),
+		    sizeof (int64_t), (xdrproc_t)xdr_longlong_t);
+		break;
+
+	case DATA_TYPE_UINT64_ARRAY:
+		ret = xdr_array(xdr, &buf, &nelem, buflen / sizeof (uint64_t),
+		    sizeof (uint64_t), (xdrproc_t)xdr_u_longlong_t);
+		break;
+
+	case DATA_TYPE_STRING_ARRAY: {
+		size_t len = nelem * sizeof (uint64_t);
+		char **strp = (void *)buf;
+		int i;
+
+		if (nvs->nvs_op == NVS_OP_DECODE)
+			bzero(buf, len);	/* don't trust packed data */
+
+		for (i = 0; i < nelem; i++) {
+			if (buflen <= len)
+				return (EFAULT);
+
+			buf += len;
+			buflen -= len;
+
+			if (xdr_string(xdr, &buf, buflen - 1) != TRUE)
+				return (EFAULT);
+
+			if (nvs->nvs_op == NVS_OP_DECODE)
+				strp[i] = buf;
+			len = strlen(buf) + 1;
+		}
+		ret = TRUE;
+		break;
+	}
+	default:
+		break;
+	}
+
+	return (ret == TRUE ? 0 : EFAULT);
+}
+
+static int
+nvs_xdr_nvp_size(nvstream_t *nvs, nvpair_t *nvp, size_t *size)
+{
+	data_type_t type = NVP_TYPE(nvp);
+	/*
+	 * encode_size + decode_size + name string size + data type + nelem
+	 * where name string size = 4 + NV_ALIGN4(strlen(NVP_NAME(nvp)))
+	 */
+	uint64_t nvp_sz = 4 + 4 + 4 + NV_ALIGN4(strlen(NVP_NAME(nvp))) + 4 + 4;
+
+	switch (type) {
+	case DATA_TYPE_BOOLEAN:
+		break;
+
+	case DATA_TYPE_BOOLEAN_VALUE:
+	case DATA_TYPE_BYTE:
+	case DATA_TYPE_INT8:
+	case DATA_TYPE_UINT8:
+	case DATA_TYPE_INT16:
+	case DATA_TYPE_UINT16:
+	case DATA_TYPE_INT32:
+	case DATA_TYPE_UINT32:
+		nvp_sz += 4;	/* 4 is the minimum xdr unit */
+		break;
+
+	case DATA_TYPE_INT64:
+	case DATA_TYPE_UINT64:
+	case DATA_TYPE_HRTIME:
+#if !defined(_KERNEL)
+	case DATA_TYPE_DOUBLE:
+#endif
+		nvp_sz += 8;
+		break;
+
+	case DATA_TYPE_STRING:
+		nvp_sz += 4 + NV_ALIGN4(strlen((char *)NVP_VALUE(nvp)));
+		break;
+
+	case DATA_TYPE_BYTE_ARRAY:
+		nvp_sz += NV_ALIGN4(NVP_NELEM(nvp));
+		break;
+
+	case DATA_TYPE_BOOLEAN_ARRAY:
+	case DATA_TYPE_INT8_ARRAY:
+	case DATA_TYPE_UINT8_ARRAY:
+	case DATA_TYPE_INT16_ARRAY:
+	case DATA_TYPE_UINT16_ARRAY:
+	case DATA_TYPE_INT32_ARRAY:
+	case DATA_TYPE_UINT32_ARRAY:
+		nvp_sz += 4 + 4 * (uint64_t)NVP_NELEM(nvp);
+		break;
+
+	case DATA_TYPE_INT64_ARRAY:
+	case DATA_TYPE_UINT64_ARRAY:
+		nvp_sz += 4 + 8 * (uint64_t)NVP_NELEM(nvp);
+		break;
+
+	case DATA_TYPE_STRING_ARRAY: {
+		int i;
+		char **strs = (void *)NVP_VALUE(nvp);
+
+		for (i = 0; i < NVP_NELEM(nvp); i++)
+			nvp_sz += 4 + NV_ALIGN4(strlen(strs[i]));
+
+		break;
+	}
+
+	case DATA_TYPE_NVLIST:
+	case DATA_TYPE_NVLIST_ARRAY: {
+		size_t nvsize = 0;
+		int old_nvs_op = nvs->nvs_op;
+		int err;
+
+		nvs->nvs_op = NVS_OP_GETSIZE;
+		if (type == DATA_TYPE_NVLIST)
+			err = nvs_operation(nvs, EMBEDDED_NVL(nvp), &nvsize);
+		else
+			err = nvs_embedded_nvl_array(nvs, nvp, &nvsize);
+		nvs->nvs_op = old_nvs_op;
+
+		if (err != 0)
+			return (EINVAL);
+
+		nvp_sz += nvsize;
+		break;
+	}
+
+	default:
+		return (EINVAL);
+	}
+
+	if (nvp_sz > INT32_MAX)
+		return (EINVAL);
+
+	*size = nvp_sz;
+
+	return (0);
+}
+
+
+/*
+ * The NVS_XDR_MAX_LEN macro takes a packed xdr buffer of size x and estimates
+ * the largest nvpair that could be encoded in the buffer.
+ *
+ * See comments above nvpair_xdr_op() for the format of xdr encoding.
+ * The size of a xdr packed nvpair without any data is 5 words.
+ *
+ * Using the size of the data directly as an estimate would be ok
+ * in all cases except one.  If the data type is of DATA_TYPE_STRING_ARRAY
+ * then the actual nvpair has space for an array of pointers to index
+ * the strings.  These pointers are not encoded into the packed xdr buffer.
+ *
+ * If the data is of type DATA_TYPE_STRING_ARRAY and all the strings are
+ * of length 0, then each string is endcoded in xdr format as a single word.
+ * Therefore when expanded to an nvpair there will be 2.25 word used for
+ * each string.  (a int64_t allocated for pointer usage, and a single char
+ * for the null termination.)
+ *
+ * This is the calculation performed by the NVS_XDR_MAX_LEN macro.
+ */
+#define	NVS_XDR_HDR_LEN		((size_t)(5 * 4))
+#define	NVS_XDR_DATA_LEN(y)	(((size_t)(y) <= NVS_XDR_HDR_LEN) ? \
+					0 : ((size_t)(y) - NVS_XDR_HDR_LEN))
+#define	NVS_XDR_MAX_LEN(x)	(NVP_SIZE_CALC(1, 0) + \
+					(NVS_XDR_DATA_LEN(x) * 2) + \
+					NV_ALIGN4((NVS_XDR_DATA_LEN(x) / 4)))
+
+static int
+nvs_xdr_nvpair(nvstream_t *nvs, nvpair_t *nvp, size_t *size)
+{
+	XDR 	*xdr = nvs->nvs_private;
+	int32_t	encode_len, decode_len;
+
+	switch (nvs->nvs_op) {
+	case NVS_OP_ENCODE: {
+		size_t nvsize;
+
+		if (nvs_xdr_nvp_size(nvs, nvp, &nvsize) != 0)
+			return (EFAULT);
+
+		decode_len = nvp->nvp_size;
+		encode_len = nvsize;
+		if (!xdr_int(xdr, &encode_len) || !xdr_int(xdr, &decode_len))
+			return (EFAULT);
+
+		return (nvs_xdr_nvp_op(nvs, nvp));
+	}
+	case NVS_OP_DECODE: {
+		struct xdr_bytesrec bytesrec;
+
+		/* get the encode and decode size */
+		if (!xdr_int(xdr, &encode_len) || !xdr_int(xdr, &decode_len))
+			return (EFAULT);
+		*size = decode_len;
+
+		/* are we at the end of the stream? */
+		if (*size == 0)
+			return (0);
+
+		/* sanity check the size parameter */
+		if (!xdr_control(xdr, XDR_GET_BYTES_AVAIL, &bytesrec))
+			return (EFAULT);
+
+		if (*size > NVS_XDR_MAX_LEN(bytesrec.xc_num_avail))
+			return (EFAULT);
+		break;
+	}
+
+	default:
+		return (EINVAL);
+	}
+	return (0);
+}
+
+static const struct nvs_ops nvs_xdr_ops = {
+	nvs_xdr_nvlist,
+	nvs_xdr_nvpair,
+	nvs_xdr_nvp_op,
+	nvs_xdr_nvp_size,
+	nvs_xdr_nvl_fini
+};
+
+static int
+nvs_xdr(nvstream_t *nvs, nvlist_t *nvl, char *buf, size_t *buflen)
+{
+	XDR xdr;
+	int err;
+
+	nvs->nvs_ops = &nvs_xdr_ops;
+
+	if ((err = nvs_xdr_create(nvs, &xdr, buf + sizeof (nvs_header_t),
+	    *buflen - sizeof (nvs_header_t))) != 0)
+		return (err);
+
+	err = nvs_operation(nvs, nvl, buflen);
+
+	nvs_xdr_destroy(nvs);
+
+	return (err);
+}
diff --git a/common/nvpair/nvpair_alloc_fixed.c b/common/nvpair/nvpair_alloc_fixed.c
new file mode 100644
index 000000000000..b1128eeb9bc3
--- /dev/null
+++ b/common/nvpair/nvpair_alloc_fixed.c
@@ -0,0 +1,120 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/stropts.h>
+#include <sys/isa_defs.h>
+#include <sys/nvpair.h>
+#include <sys/sysmacros.h>
+#if defined(_KERNEL) && !defined(_BOOT)
+#include <sys/varargs.h>
+#else
+#include <stdarg.h>
+#include <strings.h>
+#endif
+
+/*
+ * This allocator is very simple.
+ *  - it uses a pre-allocated buffer for memory allocations.
+ *  - it does _not_ free memory in the pre-allocated buffer.
+ *
+ * The reason for the selected implemention is simplicity.
+ * This allocator is designed for the usage in interrupt context when
+ * the caller may not wait for free memory.
+ */
+
+/* pre-allocated buffer for memory allocations */
+typedef struct nvbuf {
+	uintptr_t	nvb_buf;	/* address of pre-allocated buffer */
+	uintptr_t 	nvb_lim;	/* limit address in the buffer */
+	uintptr_t	nvb_cur;	/* current address in the buffer */
+} nvbuf_t;
+
+/*
+ * Initialize the pre-allocated buffer allocator. The caller needs to supply
+ *
+ *   buf	address of pre-allocated buffer
+ *   bufsz	size of pre-allocated buffer
+ *
+ * nv_fixed_init() calculates the remaining members of nvbuf_t.
+ */
+static int
+nv_fixed_init(nv_alloc_t *nva, va_list valist)
+{
+	uintptr_t base = va_arg(valist, uintptr_t);
+	uintptr_t lim = base + va_arg(valist, size_t);
+	nvbuf_t *nvb = (nvbuf_t *)P2ROUNDUP(base, sizeof (uintptr_t));
+
+	if (base == 0 || (uintptr_t)&nvb[1] > lim)
+		return (EINVAL);
+
+	nvb->nvb_buf = (uintptr_t)&nvb[0];
+	nvb->nvb_cur = (uintptr_t)&nvb[1];
+	nvb->nvb_lim = lim;
+	nva->nva_arg = nvb;
+
+	return (0);
+}
+
+static void *
+nv_fixed_alloc(nv_alloc_t *nva, size_t size)
+{
+	nvbuf_t *nvb = nva->nva_arg;
+	uintptr_t new = nvb->nvb_cur;
+
+	if (size == 0 || new + size > nvb->nvb_lim)
+		return (NULL);
+
+	nvb->nvb_cur = P2ROUNDUP(new + size, sizeof (uintptr_t));
+
+	return ((void *)new);
+}
+
+/*ARGSUSED*/
+static void
+nv_fixed_free(nv_alloc_t *nva, void *buf, size_t size)
+{
+	/* don't free memory in the pre-allocated buffer */
+}
+
+static void
+nv_fixed_reset(nv_alloc_t *nva)
+{
+	nvbuf_t *nvb = nva->nva_arg;
+
+	nvb->nvb_cur = (uintptr_t)&nvb[1];
+}
+
+const nv_alloc_ops_t nv_fixed_ops_def = {
+	nv_fixed_init,	/* nv_ao_init() */
+	NULL,		/* nv_ao_fini() */
+	nv_fixed_alloc,	/* nv_ao_alloc() */
+	nv_fixed_free,	/* nv_ao_free() */
+	nv_fixed_reset	/* nv_ao_reset() */
+};
+
+const nv_alloc_ops_t *nv_fixed_ops = &nv_fixed_ops_def;
diff --git a/common/unicode/u8_textprep.c b/common/unicode/u8_textprep.c
new file mode 100644
index 000000000000..8faf1a97e47e
--- /dev/null
+++ b/common/unicode/u8_textprep.c
@@ -0,0 +1,2132 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+
+/*
+ * UTF-8 text preparation functions (PSARC/2007/149, PSARC/2007/458).
+ *
+ * Man pages: u8_textprep_open(9F), u8_textprep_buf(9F), u8_textprep_close(9F),
+ * u8_textprep_str(9F), u8_strcmp(9F), and u8_validate(9F). See also
+ * the section 3C man pages.
+ * Interface stability: Committed.
+ */
+
+#include <sys/types.h>
+#ifdef	_KERNEL
+#include <sys/param.h>
+#include <sys/sysmacros.h>
+#include <sys/systm.h>
+#include <sys/debug.h>
+#include <sys/kmem.h>
+#include <sys/ddi.h>
+#include <sys/sunddi.h>
+#else
+#include <sys/u8_textprep.h>
+#include <strings.h>
+#endif	/* _KERNEL */
+#include <sys/byteorder.h>
+#include <sys/errno.h>
+#include <sys/u8_textprep_data.h>
+
+
+/* The maximum possible number of bytes in a UTF-8 character. */
+#define	U8_MB_CUR_MAX			(4)
+
+/*
+ * The maximum number of bytes needed for a UTF-8 character to cover
+ * U+0000 - U+FFFF, i.e., the coding space of now deprecated UCS-2.
+ */
+#define	U8_MAX_BYTES_UCS2		(3)
+
+/* The maximum possible number of bytes in a Stream-Safe Text. */
+#define	U8_STREAM_SAFE_TEXT_MAX		(128)
+
+/*
+ * The maximum number of characters in a combining/conjoining sequence and
+ * the actual upperbound limit of a combining/conjoining sequence.
+ */
+#define	U8_MAX_CHARS_A_SEQ		(32)
+#define	U8_UPPER_LIMIT_IN_A_SEQ		(31)
+
+/* The combining class value for Starter. */
+#define	U8_COMBINING_CLASS_STARTER	(0)
+
+/*
+ * Some Hangul related macros at below.
+ *
+ * The first and the last of Hangul syllables, Hangul Jamo Leading consonants,
+ * Vowels, and optional Trailing consonants in Unicode scalar values.
+ *
+ * Please be noted that the U8_HANGUL_JAMO_T_FIRST is 0x11A7 at below not
+ * the actual U+11A8. This is due to that the trailing consonant is optional
+ * and thus we are doing a pre-calculation of subtracting one.
+ *
+ * Each of 19 modern leading consonants has total 588 possible syllables since
+ * Hangul has 21 modern vowels and 27 modern trailing consonants plus 1 for
+ * no trailing consonant case, i.e., 21 x 28 = 588.
+ *
+ * We also have bunch of Hangul related macros at below. Please bear in mind
+ * that the U8_HANGUL_JAMO_1ST_BYTE can be used to check whether it is
+ * a Hangul Jamo or not but the value does not guarantee that it is a Hangul
+ * Jamo; it just guarantee that it will be most likely.
+ */
+#define	U8_HANGUL_SYL_FIRST		(0xAC00U)
+#define	U8_HANGUL_SYL_LAST		(0xD7A3U)
+
+#define	U8_HANGUL_JAMO_L_FIRST		(0x1100U)
+#define	U8_HANGUL_JAMO_L_LAST		(0x1112U)
+#define	U8_HANGUL_JAMO_V_FIRST		(0x1161U)
+#define	U8_HANGUL_JAMO_V_LAST		(0x1175U)
+#define	U8_HANGUL_JAMO_T_FIRST		(0x11A7U)
+#define	U8_HANGUL_JAMO_T_LAST		(0x11C2U)
+
+#define	U8_HANGUL_V_COUNT		(21)
+#define	U8_HANGUL_VT_COUNT		(588)
+#define	U8_HANGUL_T_COUNT		(28)
+
+#define	U8_HANGUL_JAMO_1ST_BYTE		(0xE1U)
+
+#define	U8_SAVE_HANGUL_AS_UTF8(s, i, j, k, b) \
+	(s)[(i)] = (uchar_t)(0xE0U | ((uint32_t)(b) & 0xF000U) >> 12); \
+	(s)[(j)] = (uchar_t)(0x80U | ((uint32_t)(b) & 0x0FC0U) >> 6); \
+	(s)[(k)] = (uchar_t)(0x80U | ((uint32_t)(b) & 0x003FU));
+
+#define	U8_HANGUL_JAMO_L(u) \
+	((u) >= U8_HANGUL_JAMO_L_FIRST && (u) <= U8_HANGUL_JAMO_L_LAST)
+
+#define	U8_HANGUL_JAMO_V(u) \
+	((u) >= U8_HANGUL_JAMO_V_FIRST && (u) <= U8_HANGUL_JAMO_V_LAST)
+
+#define	U8_HANGUL_JAMO_T(u) \
+	((u) > U8_HANGUL_JAMO_T_FIRST && (u) <= U8_HANGUL_JAMO_T_LAST)
+
+#define	U8_HANGUL_JAMO(u) \
+	((u) >= U8_HANGUL_JAMO_L_FIRST && (u) <= U8_HANGUL_JAMO_T_LAST)
+
+#define	U8_HANGUL_SYLLABLE(u) \
+	((u) >= U8_HANGUL_SYL_FIRST && (u) <= U8_HANGUL_SYL_LAST)
+
+#define	U8_HANGUL_COMPOSABLE_L_V(s, u) \
+	((s) == U8_STATE_HANGUL_L && U8_HANGUL_JAMO_V((u)))
+
+#define	U8_HANGUL_COMPOSABLE_LV_T(s, u) \
+	((s) == U8_STATE_HANGUL_LV && U8_HANGUL_JAMO_T((u)))
+
+/* The types of decomposition mappings. */
+#define	U8_DECOMP_BOTH			(0xF5U)
+#define	U8_DECOMP_CANONICAL		(0xF6U)
+
+/* The indicator for 16-bit table. */
+#define	U8_16BIT_TABLE_INDICATOR	(0x8000U)
+
+/* The following are some convenience macros. */
+#define	U8_PUT_3BYTES_INTO_UTF32(u, b1, b2, b3) \
+	(u) = ((uint32_t)(b1) & 0x0F) << 12 | ((uint32_t)(b2) & 0x3F) << 6 | \
+		(uint32_t)(b3) & 0x3F;
+
+#define	U8_SIMPLE_SWAP(a, b, t) \
+	(t) = (a); \
+	(a) = (b); \
+	(b) = (t);
+
+#define	U8_ASCII_TOUPPER(c) \
+	(((c) >= 'a' && (c) <= 'z') ? (c) - 'a' + 'A' : (c))
+
+#define	U8_ASCII_TOLOWER(c) \
+	(((c) >= 'A' && (c) <= 'Z') ? (c) - 'A' + 'a' : (c))
+
+#define	U8_ISASCII(c)			(((uchar_t)(c)) < 0x80U)
+/*
+ * The following macro assumes that the two characters that are to be
+ * swapped are adjacent to each other and 'a' comes before 'b'.
+ *
+ * If the assumptions are not met, then, the macro will fail.
+ */
+#define	U8_SWAP_COMB_MARKS(a, b) \
+	for (k = 0; k < disp[(a)]; k++) \
+		u8t[k] = u8s[start[(a)] + k]; \
+	for (k = 0; k < disp[(b)]; k++) \
+		u8s[start[(a)] + k] = u8s[start[(b)] + k]; \
+	start[(b)] = start[(a)] + disp[(b)]; \
+	for (k = 0; k < disp[(a)]; k++) \
+		u8s[start[(b)] + k] = u8t[k]; \
+	U8_SIMPLE_SWAP(comb_class[(a)], comb_class[(b)], tc); \
+	U8_SIMPLE_SWAP(disp[(a)], disp[(b)], tc);
+
+/* The possible states during normalization. */
+typedef enum {
+	U8_STATE_START = 0,
+	U8_STATE_HANGUL_L = 1,
+	U8_STATE_HANGUL_LV = 2,
+	U8_STATE_HANGUL_LVT = 3,
+	U8_STATE_HANGUL_V = 4,
+	U8_STATE_HANGUL_T = 5,
+	U8_STATE_COMBINING_MARK = 6
+} u8_normalization_states_t;
+
+/*
+ * The three vectors at below are used to check bytes of a given UTF-8
+ * character are valid and not containing any malformed byte values.
+ *
+ * We used to have a quite relaxed UTF-8 binary representation but then there
+ * was some security related issues and so the Unicode Consortium defined
+ * and announced the UTF-8 Corrigendum at Unicode 3.1 and then refined it
+ * one more time at the Unicode 3.2. The following three tables are based on
+ * that.
+ */
+
+#define	U8_ILLEGAL_NEXT_BYTE_COMMON(c)	((c) < 0x80 || (c) > 0xBF)
+
+#define	I_				U8_ILLEGAL_CHAR
+#define	O_				U8_OUT_OF_RANGE_CHAR
+
+const int8_t u8_number_of_bytes[0x100] = {
+	1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
+	1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
+	1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
+	1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
+	1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
+	1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
+	1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
+	1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
+
+/*	80  81  82  83  84  85  86  87  88  89  8A  8B  8C  8D  8E  8F  */
+	I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_,
+
+/*  	90  91  92  93  94  95  96  97  98  99  9A  9B  9C  9D  9E  9F  */
+	I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_,
+
+/*  	A0  A1  A2  A3  A4  A5  A6  A7  A8  A9  AA  AB  AC  AD  AE  AF  */
+	I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_,
+
+/*	B0  B1  B2  B3  B4  B5  B6  B7  B8  B9  BA  BB  BC  BD  BE  BF  */
+	I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_, I_,
+
+/*	C0  C1  C2  C3  C4  C5  C6  C7  C8  C9  CA  CB  CC  CD  CE  CF  */
+	I_, I_, 2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+
+/*	D0  D1  D2  D3  D4  D5  D6  D7  D8  D9  DA  DB  DC  DD  DE  DF  */
+	2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
+
+/*	E0  E1  E2  E3  E4  E5  E6  E7  E8  E9  EA  EB  EC  ED  EE  EF  */
+	3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,
+
+/*	F0  F1  F2  F3  F4  F5  F6  F7  F8  F9  FA  FB  FC  FD  FE  FF  */
+	4,  4,  4,  4,  4,  O_, O_, O_, O_, O_, O_, O_, O_, O_, O_, O_,
+};
+
+#undef	I_
+#undef	O_
+
+const uint8_t u8_valid_min_2nd_byte[0x100] = {
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+/*	C0    C1    C2    C3    C4    C5    C6    C7    */
+	0,    0,    0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+/*	C8    C9    CA    CB    CC    CD    CE    CF    */
+	0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+/*	D0    D1    D2    D3    D4    D5    D6    D7    */
+	0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+/*	D8    D9    DA    DB    DC    DD    DE    DF    */
+	0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+/*	E0    E1    E2    E3    E4    E5    E6    E7    */
+	0xa0, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+/*	E8    E9    EA    EB    EC    ED    EE    EF    */
+	0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+/*	F0    F1    F2    F3    F4    F5    F6    F7    */
+	0x90, 0x80, 0x80, 0x80, 0x80, 0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+};
+
+const uint8_t u8_valid_max_2nd_byte[0x100] = {
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+/*	C0    C1    C2    C3    C4    C5    C6    C7    */
+	0,    0,    0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
+/*	C8    C9    CA    CB    CC    CD    CE    CF    */
+	0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
+/*	D0    D1    D2    D3    D4    D5    D6    D7    */
+	0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
+/*	D8    D9    DA    DB    DC    DD    DE    DF    */
+	0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
+/*	E0    E1    E2    E3    E4    E5    E6    E7    */
+	0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
+/*	E8    E9    EA    EB    EC    ED    EE    EF    */
+	0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0x9f, 0xbf, 0xbf,
+/*	F0    F1    F2    F3    F4    F5    F6    F7    */
+	0xbf, 0xbf, 0xbf, 0xbf, 0x8f, 0,    0,    0,
+	0,    0,    0,    0,    0,    0,    0,    0,
+};
+
+
+/*
+ * The u8_validate() validates on the given UTF-8 character string and
+ * calculate the byte length. It is quite similar to mblen(3C) except that
+ * this will validate against the list of characters if required and
+ * specific to UTF-8 and Unicode.
+ */
+int
+u8_validate(char *u8str, size_t n, char **list, int flag, int *errnum)
+{
+	uchar_t *ib;
+	uchar_t *ibtail;
+	uchar_t **p;
+	uchar_t *s1;
+	uchar_t *s2;
+	uchar_t f;
+	int sz;
+	size_t i;
+	int ret_val;
+	boolean_t second;
+	boolean_t no_need_to_validate_entire;
+	boolean_t check_additional;
+	boolean_t validate_ucs2_range_only;
+
+	if (! u8str)
+		return (0);
+
+	ib = (uchar_t *)u8str;
+	ibtail = ib + n;
+
+	ret_val = 0;
+
+	no_need_to_validate_entire = ! (flag & U8_VALIDATE_ENTIRE);
+	check_additional = flag & U8_VALIDATE_CHECK_ADDITIONAL;
+	validate_ucs2_range_only = flag & U8_VALIDATE_UCS2_RANGE;
+
+	while (ib < ibtail) {
+		/*
+		 * The first byte of a UTF-8 character tells how many
+		 * bytes will follow for the character. If the first byte
+		 * is an illegal byte value or out of range value, we just
+		 * return -1 with an appropriate error number.
+		 */
+		sz = u8_number_of_bytes[*ib];
+		if (sz == U8_ILLEGAL_CHAR) {
+			*errnum = EILSEQ;
+			return (-1);
+		}
+
+		if (sz == U8_OUT_OF_RANGE_CHAR ||
+		    (validate_ucs2_range_only && sz > U8_MAX_BYTES_UCS2)) {
+			*errnum = ERANGE;
+			return (-1);
+		}
+
+		/*
+		 * If we don't have enough bytes to check on, that's also
+		 * an error. As you can see, we give illegal byte sequence
+		 * checking higher priority then EINVAL cases.
+		 */
+		if ((ibtail - ib) < sz) {
+			*errnum = EINVAL;
+			return (-1);
+		}
+
+		if (sz == 1) {
+			ib++;
+			ret_val++;
+		} else {
+			/*
+			 * Check on the multi-byte UTF-8 character. For more
+			 * details on this, see comment added for the used
+			 * data structures at the beginning of the file.
+			 */
+			f = *ib++;
+			ret_val++;
+			second = B_TRUE;
+			for (i = 1; i < sz; i++) {
+				if (second) {
+					if (*ib < u8_valid_min_2nd_byte[f] ||
+					    *ib > u8_valid_max_2nd_byte[f]) {
+						*errnum = EILSEQ;
+						return (-1);
+					}
+					second = B_FALSE;
+				} else if (U8_ILLEGAL_NEXT_BYTE_COMMON(*ib)) {
+					*errnum = EILSEQ;
+					return (-1);
+				}
+				ib++;
+				ret_val++;
+			}
+		}
+
+		if (check_additional) {
+			for (p = (uchar_t **)list, i = 0; p[i]; i++) {
+				s1 = ib - sz;
+				s2 = p[i];
+				while (s1 < ib) {
+					if (*s1 != *s2 || *s2 == '\0')
+						break;
+					s1++;
+					s2++;
+				}
+
+				if (s1 >= ib && *s2 == '\0') {
+					*errnum = EBADF;
+					return (-1);
+				}
+			}
+		}
+
+		if (no_need_to_validate_entire)
+			break;
+	}
+
+	return (ret_val);
+}
+
+/*
+ * The do_case_conv() looks at the mapping tables and returns found
+ * bytes if any. If not found, the input bytes are returned. The function
+ * always terminate the return bytes with a null character assuming that
+ * there are plenty of room to do so.
+ *
+ * The case conversions are simple case conversions mapping a character to
+ * another character as specified in the Unicode data. The byte size of
+ * the mapped character could be different from that of the input character.
+ *
+ * The return value is the byte length of the returned character excluding
+ * the terminating null byte.
+ */
+static size_t
+do_case_conv(int uv, uchar_t *u8s, uchar_t *s, int sz, boolean_t is_it_toupper)
+{
+	size_t i;
+	uint16_t b1 = 0;
+	uint16_t b2 = 0;
+	uint16_t b3 = 0;
+	uint16_t b3_tbl;
+	uint16_t b3_base;
+	uint16_t b4 = 0;
+	size_t start_id;
+	size_t end_id;
+
+	/*
+	 * At this point, the only possible values for sz are 2, 3, and 4.
+	 * The u8s should point to a vector that is well beyond the size of
+	 * 5 bytes.
+	 */
+	if (sz == 2) {
+		b3 = u8s[0] = s[0];
+		b4 = u8s[1] = s[1];
+	} else if (sz == 3) {
+		b2 = u8s[0] = s[0];
+		b3 = u8s[1] = s[1];
+		b4 = u8s[2] = s[2];
+	} else if (sz == 4) {
+		b1 = u8s[0] = s[0];
+		b2 = u8s[1] = s[1];
+		b3 = u8s[2] = s[2];
+		b4 = u8s[3] = s[3];
+	} else {
+		/* This is not possible but just in case as a fallback. */
+		if (is_it_toupper)
+			*u8s = U8_ASCII_TOUPPER(*s);
+		else
+			*u8s = U8_ASCII_TOLOWER(*s);
+		u8s[1] = '\0';
+
+		return (1);
+	}
+	u8s[sz] = '\0';
+
+	/*
+	 * Let's find out if we have a corresponding character.
+	 */
+	b1 = u8_common_b1_tbl[uv][b1];
+	if (b1 == U8_TBL_ELEMENT_NOT_DEF)
+		return ((size_t)sz);
+
+	b2 = u8_case_common_b2_tbl[uv][b1][b2];
+	if (b2 == U8_TBL_ELEMENT_NOT_DEF)
+		return ((size_t)sz);
+
+	if (is_it_toupper) {
+		b3_tbl = u8_toupper_b3_tbl[uv][b2][b3].tbl_id;
+		if (b3_tbl == U8_TBL_ELEMENT_NOT_DEF)
+			return ((size_t)sz);
+
+		start_id = u8_toupper_b4_tbl[uv][b3_tbl][b4];
+		end_id = u8_toupper_b4_tbl[uv][b3_tbl][b4 + 1];
+
+		/* Either there is no match or an error at the table. */
+		if (start_id >= end_id || (end_id - start_id) > U8_MB_CUR_MAX)
+			return ((size_t)sz);
+
+		b3_base = u8_toupper_b3_tbl[uv][b2][b3].base;
+
+		for (i = 0; start_id < end_id; start_id++)
+			u8s[i++] = u8_toupper_final_tbl[uv][b3_base + start_id];
+	} else {
+		b3_tbl = u8_tolower_b3_tbl[uv][b2][b3].tbl_id;
+		if (b3_tbl == U8_TBL_ELEMENT_NOT_DEF)
+			return ((size_t)sz);
+
+		start_id = u8_tolower_b4_tbl[uv][b3_tbl][b4];
+		end_id = u8_tolower_b4_tbl[uv][b3_tbl][b4 + 1];
+
+		if (start_id >= end_id || (end_id - start_id) > U8_MB_CUR_MAX)
+			return ((size_t)sz);
+
+		b3_base = u8_tolower_b3_tbl[uv][b2][b3].base;
+
+		for (i = 0; start_id < end_id; start_id++)
+			u8s[i++] = u8_tolower_final_tbl[uv][b3_base + start_id];
+	}
+
+	/*
+	 * If i is still zero, that means there is no corresponding character.
+	 */
+	if (i == 0)
+		return ((size_t)sz);
+
+	u8s[i] = '\0';
+
+	return (i);
+}
+
+/*
+ * The do_case_compare() function compares the two input strings, s1 and s2,
+ * one character at a time doing case conversions if applicable and return
+ * the comparison result as like strcmp().
+ *
+ * Since, in empirical sense, most of text data are 7-bit ASCII characters,
+ * we treat the 7-bit ASCII characters as a special case trying to yield
+ * faster processing time.
+ */
+static int
+do_case_compare(size_t uv, uchar_t *s1, uchar_t *s2, size_t n1,
+	size_t n2, boolean_t is_it_toupper, int *errnum)
+{
+	int f;
+	int sz1;
+	int sz2;
+	size_t j;
+	size_t i1;
+	size_t i2;
+	uchar_t u8s1[U8_MB_CUR_MAX + 1];
+	uchar_t u8s2[U8_MB_CUR_MAX + 1];
+
+	i1 = i2 = 0;
+	while (i1 < n1 && i2 < n2) {
+		/*
+		 * Find out what would be the byte length for this UTF-8
+		 * character at string s1 and also find out if this is
+		 * an illegal start byte or not and if so, issue a proper
+		 * error number and yet treat this byte as a character.
+		 */
+		sz1 = u8_number_of_bytes[*s1];
+		if (sz1 < 0) {
+			*errnum = EILSEQ;
+			sz1 = 1;
+		}
+
+		/*
+		 * For 7-bit ASCII characters mainly, we do a quick case
+		 * conversion right at here.
+		 *
+		 * If we don't have enough bytes for this character, issue
+		 * an EINVAL error and use what are available.
+		 *
+		 * If we have enough bytes, find out if there is
+		 * a corresponding uppercase character and if so, copy over
+		 * the bytes for a comparison later. If there is no
+		 * corresponding uppercase character, then, use what we have
+		 * for the comparison.
+		 */
+		if (sz1 == 1) {
+			if (is_it_toupper)
+				u8s1[0] = U8_ASCII_TOUPPER(*s1);
+			else
+				u8s1[0] = U8_ASCII_TOLOWER(*s1);
+			s1++;
+			u8s1[1] = '\0';
+		} else if ((i1 + sz1) > n1) {
+			*errnum = EINVAL;
+			for (j = 0; (i1 + j) < n1; )
+				u8s1[j++] = *s1++;
+			u8s1[j] = '\0';
+		} else {
+			(void) do_case_conv(uv, u8s1, s1, sz1, is_it_toupper);
+			s1 += sz1;
+		}
+
+		/* Do the same for the string s2. */
+		sz2 = u8_number_of_bytes[*s2];
+		if (sz2 < 0) {
+			*errnum = EILSEQ;
+			sz2 = 1;
+		}
+
+		if (sz2 == 1) {
+			if (is_it_toupper)
+				u8s2[0] = U8_ASCII_TOUPPER(*s2);
+			else
+				u8s2[0] = U8_ASCII_TOLOWER(*s2);
+			s2++;
+			u8s2[1] = '\0';
+		} else if ((i2 + sz2) > n2) {
+			*errnum = EINVAL;
+			for (j = 0; (i2 + j) < n2; )
+				u8s2[j++] = *s2++;
+			u8s2[j] = '\0';
+		} else {
+			(void) do_case_conv(uv, u8s2, s2, sz2, is_it_toupper);
+			s2 += sz2;
+		}
+
+		/* Now compare the two characters. */
+		if (sz1 == 1 && sz2 == 1) {
+			if (*u8s1 > *u8s2)
+				return (1);
+			if (*u8s1 < *u8s2)
+				return (-1);
+		} else {
+			f = strcmp((const char *)u8s1, (const char *)u8s2);
+			if (f != 0)
+				return (f);
+		}
+
+		/*
+		 * They were the same. Let's move on to the next
+		 * characters then.
+		 */
+		i1 += sz1;
+		i2 += sz2;
+	}
+
+	/*
+	 * We compared until the end of either or both strings.
+	 *
+	 * If we reached to or went over the ends for the both, that means
+	 * they are the same.
+	 *
+	 * If we reached only one of the two ends, that means the other string
+	 * has something which then the fact can be used to determine
+	 * the return value.
+	 */
+	if (i1 >= n1) {
+		if (i2 >= n2)
+			return (0);
+		return (-1);
+	}
+	return (1);
+}
+
+/*
+ * The combining_class() function checks on the given bytes and find out
+ * the corresponding Unicode combining class value. The return value 0 means
+ * it is a Starter. Any illegal UTF-8 character will also be treated as
+ * a Starter.
+ */
+static uchar_t
+combining_class(size_t uv, uchar_t *s, size_t sz)
+{
+	uint16_t b1 = 0;
+	uint16_t b2 = 0;
+	uint16_t b3 = 0;
+	uint16_t b4 = 0;
+
+	if (sz == 1 || sz > 4)
+		return (0);
+
+	if (sz == 2) {
+		b3 = s[0];
+		b4 = s[1];
+	} else if (sz == 3) {
+		b2 = s[0];
+		b3 = s[1];
+		b4 = s[2];
+	} else if (sz == 4) {
+		b1 = s[0];
+		b2 = s[1];
+		b3 = s[2];
+		b4 = s[3];
+	}
+
+	b1 = u8_common_b1_tbl[uv][b1];
+	if (b1 == U8_TBL_ELEMENT_NOT_DEF)
+		return (0);
+
+	b2 = u8_combining_class_b2_tbl[uv][b1][b2];
+	if (b2 == U8_TBL_ELEMENT_NOT_DEF)
+		return (0);
+
+	b3 = u8_combining_class_b3_tbl[uv][b2][b3];
+	if (b3 == U8_TBL_ELEMENT_NOT_DEF)
+		return (0);
+
+	return (u8_combining_class_b4_tbl[uv][b3][b4]);
+}
+
+/*
+ * The do_decomp() function finds out a matching decomposition if any
+ * and return. If there is no match, the input bytes are copied and returned.
+ * The function also checks if there is a Hangul, decomposes it if necessary
+ * and returns.
+ *
+ * To save time, a single byte 7-bit ASCII character should be handled by
+ * the caller.
+ *
+ * The function returns the number of bytes returned sans always terminating
+ * the null byte. It will also return a state that will tell if there was
+ * a Hangul character decomposed which then will be used by the caller.
+ */
+static size_t
+do_decomp(size_t uv, uchar_t *u8s, uchar_t *s, int sz,
+	boolean_t canonical_decomposition, u8_normalization_states_t *state)
+{
+	uint16_t b1 = 0;
+	uint16_t b2 = 0;
+	uint16_t b3 = 0;
+	uint16_t b3_tbl;
+	uint16_t b3_base;
+	uint16_t b4 = 0;
+	size_t start_id;
+	size_t end_id;
+	size_t i;
+	uint32_t u1;
+
+	if (sz == 2) {
+		b3 = u8s[0] = s[0];
+		b4 = u8s[1] = s[1];
+		u8s[2] = '\0';
+	} else if (sz == 3) {
+		/* Convert it to a Unicode scalar value. */
+		U8_PUT_3BYTES_INTO_UTF32(u1, s[0], s[1], s[2]);
+
+		/*
+		 * If this is a Hangul syllable, we decompose it into
+		 * a leading consonant, a vowel, and an optional trailing
+		 * consonant and then return.
+		 */
+		if (U8_HANGUL_SYLLABLE(u1)) {
+			u1 -= U8_HANGUL_SYL_FIRST;
+
+			b1 = U8_HANGUL_JAMO_L_FIRST + u1 / U8_HANGUL_VT_COUNT;
+			b2 = U8_HANGUL_JAMO_V_FIRST + (u1 % U8_HANGUL_VT_COUNT)
+			    / U8_HANGUL_T_COUNT;
+			b3 = u1 % U8_HANGUL_T_COUNT;
+
+			U8_SAVE_HANGUL_AS_UTF8(u8s, 0, 1, 2, b1);
+			U8_SAVE_HANGUL_AS_UTF8(u8s, 3, 4, 5, b2);
+			if (b3) {
+				b3 += U8_HANGUL_JAMO_T_FIRST;
+				U8_SAVE_HANGUL_AS_UTF8(u8s, 6, 7, 8, b3);
+
+				u8s[9] = '\0';
+				*state = U8_STATE_HANGUL_LVT;
+				return (9);
+			}
+
+			u8s[6] = '\0';
+			*state = U8_STATE_HANGUL_LV;
+			return (6);
+		}
+
+		b2 = u8s[0] = s[0];
+		b3 = u8s[1] = s[1];
+		b4 = u8s[2] = s[2];
+		u8s[3] = '\0';
+
+		/*
+		 * If this is a Hangul Jamo, we know there is nothing
+		 * further that we can decompose.
+		 */
+		if (U8_HANGUL_JAMO_L(u1)) {
+			*state = U8_STATE_HANGUL_L;
+			return (3);
+		}
+
+		if (U8_HANGUL_JAMO_V(u1)) {
+			if (*state == U8_STATE_HANGUL_L)
+				*state = U8_STATE_HANGUL_LV;
+			else
+				*state = U8_STATE_HANGUL_V;
+			return (3);
+		}
+
+		if (U8_HANGUL_JAMO_T(u1)) {
+			if (*state == U8_STATE_HANGUL_LV)
+				*state = U8_STATE_HANGUL_LVT;
+			else
+				*state = U8_STATE_HANGUL_T;
+			return (3);
+		}
+	} else if (sz == 4) {
+		b1 = u8s[0] = s[0];
+		b2 = u8s[1] = s[1];
+		b3 = u8s[2] = s[2];
+		b4 = u8s[3] = s[3];
+		u8s[4] = '\0';
+	} else {
+		/*
+		 * This is a fallback and should not happen if the function
+		 * was called properly.
+		 */
+		u8s[0] = s[0];
+		u8s[1] = '\0';
+		*state = U8_STATE_START;
+		return (1);
+	}
+
+	/*
+	 * At this point, this rountine does not know what it would get.
+	 * The caller should sort it out if the state isn't a Hangul one.
+	 */
+	*state = U8_STATE_START;
+
+	/* Try to find matching decomposition mapping byte sequence. */
+	b1 = u8_common_b1_tbl[uv][b1];
+	if (b1 == U8_TBL_ELEMENT_NOT_DEF)
+		return ((size_t)sz);
+
+	b2 = u8_decomp_b2_tbl[uv][b1][b2];
+	if (b2 == U8_TBL_ELEMENT_NOT_DEF)
+		return ((size_t)sz);
+
+	b3_tbl = u8_decomp_b3_tbl[uv][b2][b3].tbl_id;
+	if (b3_tbl == U8_TBL_ELEMENT_NOT_DEF)
+		return ((size_t)sz);
+
+	/*
+	 * If b3_tbl is bigger than or equal to U8_16BIT_TABLE_INDICATOR
+	 * which is 0x8000, this means we couldn't fit the mappings into
+	 * the cardinality of a unsigned byte.
+	 */
+	if (b3_tbl >= U8_16BIT_TABLE_INDICATOR) {
+		b3_tbl -= U8_16BIT_TABLE_INDICATOR;
+		start_id = u8_decomp_b4_16bit_tbl[uv][b3_tbl][b4];
+		end_id = u8_decomp_b4_16bit_tbl[uv][b3_tbl][b4 + 1];
+	} else {
+		start_id = u8_decomp_b4_tbl[uv][b3_tbl][b4];
+		end_id = u8_decomp_b4_tbl[uv][b3_tbl][b4 + 1];
+	}
+
+	/* This also means there wasn't any matching decomposition. */
+	if (start_id >= end_id)
+		return ((size_t)sz);
+
+	/*
+	 * The final table for decomposition mappings has three types of
+	 * byte sequences depending on whether a mapping is for compatibility
+	 * decomposition, canonical decomposition, or both like the following:
+	 *
+	 * (1) Compatibility decomposition mappings:
+	 *
+	 *	+---+---+-...-+---+
+	 *	| B0| B1| ... | Bm|
+	 *	+---+---+-...-+---+
+	 *
+	 *	The first byte, B0, is always less then 0xF5 (U8_DECOMP_BOTH).
+	 *
+	 * (2) Canonical decomposition mappings:
+	 *
+	 *	+---+---+---+-...-+---+
+	 *	| T | b0| b1| ... | bn|
+	 *	+---+---+---+-...-+---+
+	 *
+	 *	where the first byte, T, is 0xF6 (U8_DECOMP_CANONICAL).
+	 *
+	 * (3) Both mappings:
+	 *
+	 *	+---+---+---+---+-...-+---+---+---+-...-+---+
+	 *	| T | D | b0| b1| ... | bn| B0| B1| ... | Bm|
+	 *	+---+---+---+---+-...-+---+---+---+-...-+---+
+	 *
+	 *	where T is 0xF5 (U8_DECOMP_BOTH) and D is a displacement
+	 *	byte, b0 to bn are canonical mapping bytes and B0 to Bm are
+	 *	compatibility mapping bytes.
+	 *
+	 * Note that compatibility decomposition means doing recursive
+	 * decompositions using both compatibility decomposition mappings and
+	 * canonical decomposition mappings. On the other hand, canonical
+	 * decomposition means doing recursive decompositions using only
+	 * canonical decomposition mappings. Since the table we have has gone
+	 * through the recursions already, we do not need to do so during
+	 * runtime, i.e., the table has been completely flattened out
+	 * already.
+	 */
+
+	b3_base = u8_decomp_b3_tbl[uv][b2][b3].base;
+
+	/* Get the type, T, of the byte sequence. */
+	b1 = u8_decomp_final_tbl[uv][b3_base + start_id];
+
+	/*
+	 * If necessary, adjust start_id, end_id, or both. Note that if
+	 * this is compatibility decomposition mapping, there is no
+	 * adjustment.
+	 */
+	if (canonical_decomposition) {
+		/* Is the mapping only for compatibility decomposition? */
+		if (b1 < U8_DECOMP_BOTH)
+			return ((size_t)sz);
+
+		start_id++;
+
+		if (b1 == U8_DECOMP_BOTH) {
+			end_id = start_id +
+			    u8_decomp_final_tbl[uv][b3_base + start_id];
+			start_id++;
+		}
+	} else {
+		/*
+		 * Unless this is a compatibility decomposition mapping,
+		 * we adjust the start_id.
+		 */
+		if (b1 == U8_DECOMP_BOTH) {
+			start_id++;
+			start_id += u8_decomp_final_tbl[uv][b3_base + start_id];
+		} else if (b1 == U8_DECOMP_CANONICAL) {
+			start_id++;
+		}
+	}
+
+	for (i = 0; start_id < end_id; start_id++)
+		u8s[i++] = u8_decomp_final_tbl[uv][b3_base + start_id];
+	u8s[i] = '\0';
+
+	return (i);
+}
+
+/*
+ * The find_composition_start() function uses the character bytes given and
+ * find out the matching composition mappings if any and return the address
+ * to the composition mappings as explained in the do_composition().
+ */
+static uchar_t *
+find_composition_start(size_t uv, uchar_t *s, size_t sz)
+{
+	uint16_t b1 = 0;
+	uint16_t b2 = 0;
+	uint16_t b3 = 0;
+	uint16_t b3_tbl;
+	uint16_t b3_base;
+	uint16_t b4 = 0;
+	size_t start_id;
+	size_t end_id;
+
+	if (sz == 1) {
+		b4 = s[0];
+	} else if (sz == 2) {
+		b3 = s[0];
+		b4 = s[1];
+	} else if (sz == 3) {
+		b2 = s[0];
+		b3 = s[1];
+		b4 = s[2];
+	} else if (sz == 4) {
+		b1 = s[0];
+		b2 = s[1];
+		b3 = s[2];
+		b4 = s[3];
+	} else {
+		/*
+		 * This is a fallback and should not happen if the function
+		 * was called properly.
+		 */
+		return (NULL);
+	}
+
+	b1 = u8_composition_b1_tbl[uv][b1];
+	if (b1 == U8_TBL_ELEMENT_NOT_DEF)
+		return (NULL);
+
+	b2 = u8_composition_b2_tbl[uv][b1][b2];
+	if (b2 == U8_TBL_ELEMENT_NOT_DEF)
+		return (NULL);
+
+	b3_tbl = u8_composition_b3_tbl[uv][b2][b3].tbl_id;
+	if (b3_tbl == U8_TBL_ELEMENT_NOT_DEF)
+		return (NULL);
+
+	if (b3_tbl >= U8_16BIT_TABLE_INDICATOR) {
+		b3_tbl -= U8_16BIT_TABLE_INDICATOR;
+		start_id = u8_composition_b4_16bit_tbl[uv][b3_tbl][b4];
+		end_id = u8_composition_b4_16bit_tbl[uv][b3_tbl][b4 + 1];
+	} else {
+		start_id = u8_composition_b4_tbl[uv][b3_tbl][b4];
+		end_id = u8_composition_b4_tbl[uv][b3_tbl][b4 + 1];
+	}
+
+	if (start_id >= end_id)
+		return (NULL);
+
+	b3_base = u8_composition_b3_tbl[uv][b2][b3].base;
+
+	return ((uchar_t *)&(u8_composition_final_tbl[uv][b3_base + start_id]));
+}
+
+/*
+ * The blocked() function checks on the combining class values of previous
+ * characters in this sequence and return whether it is blocked or not.
+ */
+static boolean_t
+blocked(uchar_t *comb_class, size_t last)
+{
+	uchar_t my_comb_class;
+	size_t i;
+
+	my_comb_class = comb_class[last];
+	for (i = 1; i < last; i++)
+		if (comb_class[i] >= my_comb_class ||
+		    comb_class[i] == U8_COMBINING_CLASS_STARTER)
+			return (B_TRUE);
+
+	return (B_FALSE);
+}
+
+/*
+ * The do_composition() reads the character string pointed by 's' and
+ * do necessary canonical composition and then copy over the result back to
+ * the 's'.
+ *
+ * The input argument 's' cannot contain more than 32 characters.
+ */
+static size_t
+do_composition(size_t uv, uchar_t *s, uchar_t *comb_class, uchar_t *start,
+	uchar_t *disp, size_t last, uchar_t **os, uchar_t *oslast)
+{
+	uchar_t t[U8_STREAM_SAFE_TEXT_MAX + 1];
+	uchar_t tc[U8_MB_CUR_MAX];
+	uint8_t saved_marks[U8_MAX_CHARS_A_SEQ];
+	size_t saved_marks_count;
+	uchar_t *p;
+	uchar_t *saved_p;
+	uchar_t *q;
+	size_t i;
+	size_t saved_i;
+	size_t j;
+	size_t k;
+	size_t l;
+	size_t C;
+	size_t saved_l;
+	size_t size;
+	uint32_t u1;
+	uint32_t u2;
+	boolean_t match_not_found = B_TRUE;
+
+	/*
+	 * This should never happen unless the callers are doing some strange
+	 * and unexpected things.
+	 *
+	 * The "last" is the index pointing to the last character not last + 1.
+	 */
+	if (last >= U8_MAX_CHARS_A_SEQ)
+		last = U8_UPPER_LIMIT_IN_A_SEQ;
+
+	for (i = l = 0; i <= last; i++) {
+		/*
+		 * The last or any non-Starters at the beginning, we don't
+		 * have any chance to do composition and so we just copy them
+		 * to the temporary buffer.
+		 */
+		if (i >= last || comb_class[i] != U8_COMBINING_CLASS_STARTER) {
+SAVE_THE_CHAR:
+			p = s + start[i];
+			size = disp[i];
+			for (k = 0; k < size; k++)
+				t[l++] = *p++;
+			continue;
+		}
+
+		/*
+		 * If this could be a start of Hangul Jamos, then, we try to
+		 * conjoin them.
+		 */
+		if (s[start[i]] == U8_HANGUL_JAMO_1ST_BYTE) {
+			U8_PUT_3BYTES_INTO_UTF32(u1, s[start[i]],
+			    s[start[i] + 1], s[start[i] + 2]);
+			U8_PUT_3BYTES_INTO_UTF32(u2, s[start[i] + 3],
+			    s[start[i] + 4], s[start[i] + 5]);
+
+			if (U8_HANGUL_JAMO_L(u1) && U8_HANGUL_JAMO_V(u2)) {
+				u1 -= U8_HANGUL_JAMO_L_FIRST;
+				u2 -= U8_HANGUL_JAMO_V_FIRST;
+				u1 = U8_HANGUL_SYL_FIRST +
+				    (u1 * U8_HANGUL_V_COUNT + u2) *
+				    U8_HANGUL_T_COUNT;
+
+				i += 2;
+				if (i <= last) {
+					U8_PUT_3BYTES_INTO_UTF32(u2,
+					    s[start[i]], s[start[i] + 1],
+					    s[start[i] + 2]);
+
+					if (U8_HANGUL_JAMO_T(u2)) {
+						u1 += u2 -
+						    U8_HANGUL_JAMO_T_FIRST;
+						i++;
+					}
+				}
+
+				U8_SAVE_HANGUL_AS_UTF8(t + l, 0, 1, 2, u1);
+				i--;
+				l += 3;
+				continue;
+			}
+		}
+
+		/*
+		 * Let's then find out if this Starter has composition
+		 * mapping.
+		 */
+		p = find_composition_start(uv, s + start[i], disp[i]);
+		if (p == NULL)
+			goto SAVE_THE_CHAR;
+
+		/*
+		 * We have a Starter with composition mapping and the next
+		 * character is a non-Starter. Let's try to find out if
+		 * we can do composition.
+		 */
+
+		saved_p = p;
+		saved_i = i;
+		saved_l = l;
+		saved_marks_count = 0;
+
+TRY_THE_NEXT_MARK:
+		q = s + start[++i];
+		size = disp[i];
+
+		/*
+		 * The next for() loop compares the non-Starter pointed by
+		 * 'q' with the possible (joinable) characters pointed by 'p'.
+		 *
+		 * The composition final table entry pointed by the 'p'
+		 * looks like the following:
+		 *
+		 * +---+---+---+-...-+---+---+---+---+-...-+---+---+
+		 * | C | b0| b2| ... | bn| F | B0| B1| ... | Bm| F |
+		 * +---+---+---+-...-+---+---+---+---+-...-+---+---+
+		 *
+		 * where C is the count byte indicating the number of
+		 * mapping pairs where each pair would be look like
+		 * (b0-bn F, B0-Bm F). The b0-bn are the bytes of the second
+		 * character of a canonical decomposition and the B0-Bm are
+		 * the bytes of a matching composite character. The F is
+		 * a filler byte after each character as the separator.
+		 */
+
+		match_not_found = B_TRUE;
+
+		for (C = *p++; C > 0; C--) {
+			for (k = 0; k < size; p++, k++)
+				if (*p != q[k])
+					break;
+
+			/* Have we found it? */
+			if (k >= size && *p == U8_TBL_ELEMENT_FILLER) {
+				match_not_found = B_FALSE;
+
+				l = saved_l;
+
+				while (*++p != U8_TBL_ELEMENT_FILLER)
+					t[l++] = *p;
+
+				break;
+			}
+
+			/* We didn't find; skip to the next pair. */
+			if (*p != U8_TBL_ELEMENT_FILLER)
+				while (*++p != U8_TBL_ELEMENT_FILLER)
+					;
+			while (*++p != U8_TBL_ELEMENT_FILLER)
+				;
+			p++;
+		}
+
+		/*
+		 * If there was no match, we will need to save the combining
+		 * mark for later appending. After that, if the next one
+		 * is a non-Starter and not blocked, then, we try once
+		 * again to do composition with the next non-Starter.
+		 *
+		 * If there was no match and this was a Starter, then,
+		 * this is a new start.
+		 *
+		 * If there was a match and a composition done and we have
+		 * more to check on, then, we retrieve a new composition final
+		 * table entry for the composite and then try to do the
+		 * composition again.
+		 */
+
+		if (match_not_found) {
+			if (comb_class[i] == U8_COMBINING_CLASS_STARTER) {
+				i--;
+				goto SAVE_THE_CHAR;
+			}
+
+			saved_marks[saved_marks_count++] = i;
+		}
+
+		if (saved_l == l) {
+			while (i < last) {
+				if (blocked(comb_class, i + 1))
+					saved_marks[saved_marks_count++] = ++i;
+				else
+					break;
+			}
+			if (i < last) {
+				p = saved_p;
+				goto TRY_THE_NEXT_MARK;
+			}
+		} else if (i < last) {
+			p = find_composition_start(uv, t + saved_l,
+			    l - saved_l);
+			if (p != NULL) {
+				saved_p = p;
+				goto TRY_THE_NEXT_MARK;
+			}
+		}
+
+		/*
+		 * There is no more composition possible.
+		 *
+		 * If there was no composition what so ever then we copy
+		 * over the original Starter and then append any non-Starters
+		 * remaining at the target string sequentially after that.
+		 */
+
+		if (saved_l == l) {
+			p = s + start[saved_i];
+			size = disp[saved_i];
+			for (j = 0; j < size; j++)
+				t[l++] = *p++;
+		}
+
+		for (k = 0; k < saved_marks_count; k++) {
+			p = s + start[saved_marks[k]];
+			size = disp[saved_marks[k]];
+			for (j = 0; j < size; j++)
+				t[l++] = *p++;
+		}
+	}
+
+	/*
+	 * If the last character is a Starter and if we have a character
+	 * (possibly another Starter) that can be turned into a composite,
+	 * we do so and we do so until there is no more of composition
+	 * possible.
+	 */
+	if (comb_class[last] == U8_COMBINING_CLASS_STARTER) {
+		p = *os;
+		saved_l = l - disp[last];
+
+		while (p < oslast) {
+			size = u8_number_of_bytes[*p];
+			if (size <= 1 || (p + size) > oslast)
+				break;
+
+			saved_p = p;
+
+			for (i = 0; i < size; i++)
+				tc[i] = *p++;
+
+			q = find_composition_start(uv, t + saved_l,
+			    l - saved_l);
+			if (q == NULL) {
+				p = saved_p;
+				break;
+			}
+
+			match_not_found = B_TRUE;
+
+			for (C = *q++; C > 0; C--) {
+				for (k = 0; k < size; q++, k++)
+					if (*q != tc[k])
+						break;
+
+				if (k >= size && *q == U8_TBL_ELEMENT_FILLER) {
+					match_not_found = B_FALSE;
+
+					l = saved_l;
+
+					while (*++q != U8_TBL_ELEMENT_FILLER) {
+						/*
+						 * This is practically
+						 * impossible but we don't
+						 * want to take any chances.
+						 */
+						if (l >=
+						    U8_STREAM_SAFE_TEXT_MAX) {
+							p = saved_p;
+							goto SAFE_RETURN;
+						}
+						t[l++] = *q;
+					}
+
+					break;
+				}
+
+				if (*q != U8_TBL_ELEMENT_FILLER)
+					while (*++q != U8_TBL_ELEMENT_FILLER)
+						;
+				while (*++q != U8_TBL_ELEMENT_FILLER)
+					;
+				q++;
+			}
+
+			if (match_not_found) {
+				p = saved_p;
+				break;
+			}
+		}
+SAFE_RETURN:
+		*os = p;
+	}
+
+	/*
+	 * Now we copy over the temporary string to the target string.
+	 * Since composition always reduces the number of characters or
+	 * the number of characters stay, we don't need to worry about
+	 * the buffer overflow here.
+	 */
+	for (i = 0; i < l; i++)
+		s[i] = t[i];
+	s[l] = '\0';
+
+	return (l);
+}
+
+/*
+ * The collect_a_seq() function checks on the given string s, collect
+ * a sequence of characters at u8s, and return the sequence. While it collects
+ * a sequence, it also applies case conversion, canonical or compatibility
+ * decomposition, canonical decomposition, or some or all of them and
+ * in that order.
+ *
+ * The collected sequence cannot be bigger than 32 characters since if
+ * it is having more than 31 characters, the sequence will be terminated
+ * with a U+034F COMBINING GRAPHEME JOINER (CGJ) character and turned into
+ * a Stream-Safe Text. The collected sequence is always terminated with
+ * a null byte and the return value is the byte length of the sequence
+ * including 0. The return value does not include the terminating
+ * null byte.
+ */
+static size_t
+collect_a_seq(size_t uv, uchar_t *u8s, uchar_t **source, uchar_t *slast,
+	boolean_t is_it_toupper,
+	boolean_t is_it_tolower,
+	boolean_t canonical_decomposition,
+	boolean_t compatibility_decomposition,
+	boolean_t canonical_composition,
+	int *errnum, u8_normalization_states_t *state)
+{
+	uchar_t *s;
+	int sz;
+	int saved_sz;
+	size_t i;
+	size_t j;
+	size_t k;
+	size_t l;
+	uchar_t comb_class[U8_MAX_CHARS_A_SEQ];
+	uchar_t disp[U8_MAX_CHARS_A_SEQ];
+	uchar_t start[U8_MAX_CHARS_A_SEQ];
+	uchar_t u8t[U8_MB_CUR_MAX];
+	uchar_t uts[U8_STREAM_SAFE_TEXT_MAX + 1];
+	uchar_t tc;
+	size_t last;
+	size_t saved_last;
+	uint32_t u1;
+
+	/*
+	 * Save the source string pointer which we will return a changed
+	 * pointer if we do processing.
+	 */
+	s = *source;
+
+	/*
+	 * The following is a fallback for just in case callers are not
+	 * checking the string boundaries before the calling.
+	 */
+	if (s >= slast) {
+		u8s[0] = '\0';
+
+		return (0);
+	}
+
+	/*
+	 * As the first thing, let's collect a character and do case
+	 * conversion if necessary.
+	 */
+
+	sz = u8_number_of_bytes[*s];
+
+	if (sz < 0) {
+		*errnum = EILSEQ;
+
+		u8s[0] = *s++;
+		u8s[1] = '\0';
+
+		*source = s;
+
+		return (1);
+	}
+
+	if (sz == 1) {
+		if (is_it_toupper)
+			u8s[0] = U8_ASCII_TOUPPER(*s);
+		else if (is_it_tolower)
+			u8s[0] = U8_ASCII_TOLOWER(*s);
+		else
+			u8s[0] = *s;
+		s++;
+		u8s[1] = '\0';
+	} else if ((s + sz) > slast) {
+		*errnum = EINVAL;
+
+		for (i = 0; s < slast; )
+			u8s[i++] = *s++;
+		u8s[i] = '\0';
+
+		*source = s;
+
+		return (i);
+	} else {
+		if (is_it_toupper || is_it_tolower) {
+			i = do_case_conv(uv, u8s, s, sz, is_it_toupper);
+			s += sz;
+			sz = i;
+		} else {
+			for (i = 0; i < sz; )
+				u8s[i++] = *s++;
+			u8s[i] = '\0';
+		}
+	}
+
+	/*
+	 * And then canonical/compatibility decomposition followed by
+	 * an optional canonical composition. Please be noted that
+	 * canonical composition is done only when a decomposition is
+	 * done.
+	 */
+	if (canonical_decomposition || compatibility_decomposition) {
+		if (sz == 1) {
+			*state = U8_STATE_START;
+
+			saved_sz = 1;
+
+			comb_class[0] = 0;
+			start[0] = 0;
+			disp[0] = 1;
+
+			last = 1;
+		} else {
+			saved_sz = do_decomp(uv, u8s, u8s, sz,
+			    canonical_decomposition, state);
+
+			last = 0;
+
+			for (i = 0; i < saved_sz; ) {
+				sz = u8_number_of_bytes[u8s[i]];
+
+				comb_class[last] = combining_class(uv,
+				    u8s + i, sz);
+				start[last] = i;
+				disp[last] = sz;
+
+				last++;
+				i += sz;
+			}
+
+			/*
+			 * Decomposition yields various Hangul related
+			 * states but not on combining marks. We need to
+			 * find out at here by checking on the last
+			 * character.
+			 */
+			if (*state == U8_STATE_START) {
+				if (comb_class[last - 1])
+					*state = U8_STATE_COMBINING_MARK;
+			}
+		}
+
+		saved_last = last;
+
+		while (s < slast) {
+			sz = u8_number_of_bytes[*s];
+
+			/*
+			 * If this is an illegal character, an incomplete
+			 * character, or an 7-bit ASCII Starter character,
+			 * then we have collected a sequence; break and let
+			 * the next call deal with the two cases.
+			 *
+			 * Note that this is okay only if you are using this
+			 * function with a fixed length string, not on
+			 * a buffer with multiple calls of one chunk at a time.
+			 */
+			if (sz <= 1) {
+				break;
+			} else if ((s + sz) > slast) {
+				break;
+			} else {
+				/*
+				 * If the previous character was a Hangul Jamo
+				 * and this character is a Hangul Jamo that
+				 * can be conjoined, we collect the Jamo.
+				 */
+				if (*s == U8_HANGUL_JAMO_1ST_BYTE) {
+					U8_PUT_3BYTES_INTO_UTF32(u1,
+					    *s, *(s + 1), *(s + 2));
+
+					if (U8_HANGUL_COMPOSABLE_L_V(*state,
+					    u1)) {
+						i = 0;
+						*state = U8_STATE_HANGUL_LV;
+						goto COLLECT_A_HANGUL;
+					}
+
+					if (U8_HANGUL_COMPOSABLE_LV_T(*state,
+					    u1)) {
+						i = 0;
+						*state = U8_STATE_HANGUL_LVT;
+						goto COLLECT_A_HANGUL;
+					}
+				}
+
+				/*
+				 * Regardless of whatever it was, if this is
+				 * a Starter, we don't collect the character
+				 * since that's a new start and we will deal
+				 * with it at the next time.
+				 */
+				i = combining_class(uv, s, sz);
+				if (i == U8_COMBINING_CLASS_STARTER)
+					break;
+
+				/*
+				 * We know the current character is a combining
+				 * mark. If the previous character wasn't
+				 * a Starter (not Hangul) or a combining mark,
+				 * then, we don't collect this combining mark.
+				 */
+				if (*state != U8_STATE_START &&
+				    *state != U8_STATE_COMBINING_MARK)
+					break;
+
+				*state = U8_STATE_COMBINING_MARK;
+COLLECT_A_HANGUL:
+				/*
+				 * If we collected a Starter and combining
+				 * marks up to 30, i.e., total 31 characters,
+				 * then, we terminate this degenerately long
+				 * combining sequence with a U+034F COMBINING
+				 * GRAPHEME JOINER (CGJ) which is 0xCD 0x8F in
+				 * UTF-8 and turn this into a Stream-Safe
+				 * Text. This will be extremely rare but
+				 * possible.
+				 *
+				 * The following will also guarantee that
+				 * we are not writing more than 32 characters
+				 * plus a NULL at u8s[].
+				 */
+				if (last >= U8_UPPER_LIMIT_IN_A_SEQ) {
+TURN_STREAM_SAFE:
+					*state = U8_STATE_START;
+					comb_class[last] = 0;
+					start[last] = saved_sz;
+					disp[last] = 2;
+					last++;
+
+					u8s[saved_sz++] = 0xCD;
+					u8s[saved_sz++] = 0x8F;
+
+					break;
+				}
+
+				/*
+				 * Some combining marks also do decompose into
+				 * another combining mark or marks.
+				 */
+				if (*state == U8_STATE_COMBINING_MARK) {
+					k = last;
+					l = sz;
+					i = do_decomp(uv, uts, s, sz,
+					    canonical_decomposition, state);
+					for (j = 0; j < i; ) {
+						sz = u8_number_of_bytes[uts[j]];
+
+						comb_class[last] =
+						    combining_class(uv,
+						    uts + j, sz);
+						start[last] = saved_sz + j;
+						disp[last] = sz;
+
+						last++;
+						if (last >=
+						    U8_UPPER_LIMIT_IN_A_SEQ) {
+							last = k;
+							goto TURN_STREAM_SAFE;
+						}
+						j += sz;
+					}
+
+					*state = U8_STATE_COMBINING_MARK;
+					sz = i;
+					s += l;
+
+					for (i = 0; i < sz; i++)
+						u8s[saved_sz++] = uts[i];
+				} else {
+					comb_class[last] = i;
+					start[last] = saved_sz;
+					disp[last] = sz;
+					last++;
+
+					for (i = 0; i < sz; i++)
+						u8s[saved_sz++] = *s++;
+				}
+
+				/*
+				 * If this is U+0345 COMBINING GREEK
+				 * YPOGEGRAMMENI (0xCD 0x85 in UTF-8), a.k.a.,
+				 * iota subscript, and need to be converted to
+				 * uppercase letter, convert it to U+0399 GREEK
+				 * CAPITAL LETTER IOTA (0xCE 0x99 in UTF-8),
+				 * i.e., convert to capital adscript form as
+				 * specified in the Unicode standard.
+				 *
+				 * This is the only special case of (ambiguous)
+				 * case conversion at combining marks and
+				 * probably the standard will never have
+				 * anything similar like this in future.
+				 */
+				if (is_it_toupper && sz >= 2 &&
+				    u8s[saved_sz - 2] == 0xCD &&
+				    u8s[saved_sz - 1] == 0x85) {
+					u8s[saved_sz - 2] = 0xCE;
+					u8s[saved_sz - 1] = 0x99;
+				}
+			}
+		}
+
+		/*
+		 * Let's try to ensure a canonical ordering for the collected
+		 * combining marks. We do this only if we have collected
+		 * at least one more non-Starter. (The decomposition mapping
+		 * data tables have fully (and recursively) expanded and
+		 * canonically ordered decompositions.)
+		 *
+		 * The U8_SWAP_COMB_MARKS() convenience macro has some
+		 * assumptions and we are meeting the assumptions.
+		 */
+		last--;
+		if (last >= saved_last) {
+			for (i = 0; i < last; i++)
+				for (j = last; j > i; j--)
+					if (comb_class[j] &&
+					    comb_class[j - 1] > comb_class[j]) {
+						U8_SWAP_COMB_MARKS(j - 1, j);
+					}
+		}
+
+		*source = s;
+
+		if (! canonical_composition) {
+			u8s[saved_sz] = '\0';
+			return (saved_sz);
+		}
+
+		/*
+		 * Now do the canonical composition. Note that we do this
+		 * only after a canonical or compatibility decomposition to
+		 * finish up NFC or NFKC.
+		 */
+		sz = do_composition(uv, u8s, comb_class, start, disp, last,
+		    &s, slast);
+	}
+
+	*source = s;
+
+	return ((size_t)sz);
+}
+
+/*
+ * The do_norm_compare() function does string comparion based on Unicode
+ * simple case mappings and Unicode Normalization definitions.
+ *
+ * It does so by collecting a sequence of character at a time and comparing
+ * the collected sequences from the strings.
+ *
+ * The meanings on the return values are the same as the usual strcmp().
+ */
+static int
+do_norm_compare(size_t uv, uchar_t *s1, uchar_t *s2, size_t n1, size_t n2,
+	int flag, int *errnum)
+{
+	int result;
+	size_t sz1;
+	size_t sz2;
+	uchar_t u8s1[U8_STREAM_SAFE_TEXT_MAX + 1];
+	uchar_t u8s2[U8_STREAM_SAFE_TEXT_MAX + 1];
+	uchar_t *s1last;
+	uchar_t *s2last;
+	boolean_t is_it_toupper;
+	boolean_t is_it_tolower;
+	boolean_t canonical_decomposition;
+	boolean_t compatibility_decomposition;
+	boolean_t canonical_composition;
+	u8_normalization_states_t state;
+
+	s1last = s1 + n1;
+	s2last = s2 + n2;
+
+	is_it_toupper = flag & U8_TEXTPREP_TOUPPER;
+	is_it_tolower = flag & U8_TEXTPREP_TOLOWER;
+	canonical_decomposition = flag & U8_CANON_DECOMP;
+	compatibility_decomposition = flag & U8_COMPAT_DECOMP;
+	canonical_composition = flag & U8_CANON_COMP;
+
+	while (s1 < s1last && s2 < s2last) {
+		/*
+		 * If the current character is a 7-bit ASCII and the last
+		 * character, or, if the current character and the next
+		 * character are both some 7-bit ASCII characters then
+		 * we treat the current character as a sequence.
+		 *
+		 * In any other cases, we need to call collect_a_seq().
+		 */
+
+		if (U8_ISASCII(*s1) && ((s1 + 1) >= s1last ||
+		    ((s1 + 1) < s1last && U8_ISASCII(*(s1 + 1))))) {
+			if (is_it_toupper)
+				u8s1[0] = U8_ASCII_TOUPPER(*s1);
+			else if (is_it_tolower)
+				u8s1[0] = U8_ASCII_TOLOWER(*s1);
+			else
+				u8s1[0] = *s1;
+			u8s1[1] = '\0';
+			sz1 = 1;
+			s1++;
+		} else {
+			state = U8_STATE_START;
+			sz1 = collect_a_seq(uv, u8s1, &s1, s1last,
+			    is_it_toupper, is_it_tolower,
+			    canonical_decomposition,
+			    compatibility_decomposition,
+			    canonical_composition, errnum, &state);
+		}
+
+		if (U8_ISASCII(*s2) && ((s2 + 1) >= s2last ||
+		    ((s2 + 1) < s2last && U8_ISASCII(*(s2 + 1))))) {
+			if (is_it_toupper)
+				u8s2[0] = U8_ASCII_TOUPPER(*s2);
+			else if (is_it_tolower)
+				u8s2[0] = U8_ASCII_TOLOWER(*s2);
+			else
+				u8s2[0] = *s2;
+			u8s2[1] = '\0';
+			sz2 = 1;
+			s2++;
+		} else {
+			state = U8_STATE_START;
+			sz2 = collect_a_seq(uv, u8s2, &s2, s2last,
+			    is_it_toupper, is_it_tolower,
+			    canonical_decomposition,
+			    compatibility_decomposition,
+			    canonical_composition, errnum, &state);
+		}
+
+		/*
+		 * Now compare the two characters. If they are the same,
+		 * we move on to the next character sequences.
+		 */
+		if (sz1 == 1 && sz2 == 1) {
+			if (*u8s1 > *u8s2)
+				return (1);
+			if (*u8s1 < *u8s2)
+				return (-1);
+		} else {
+			result = strcmp((const char *)u8s1, (const char *)u8s2);
+			if (result != 0)
+				return (result);
+		}
+	}
+
+	/*
+	 * We compared until the end of either or both strings.
+	 *
+	 * If we reached to or went over the ends for the both, that means
+	 * they are the same.
+	 *
+	 * If we reached only one end, that means the other string has
+	 * something which then can be used to determine the return value.
+	 */
+	if (s1 >= s1last) {
+		if (s2 >= s2last)
+			return (0);
+		return (-1);
+	}
+	return (1);
+}
+
+/*
+ * The u8_strcmp() function compares two UTF-8 strings quite similar to
+ * the strcmp(). For the comparison, however, Unicode Normalization specific
+ * equivalency and Unicode simple case conversion mappings based equivalency
+ * can be requested and checked against.
+ */
+int
+u8_strcmp(const char *s1, const char *s2, size_t n, int flag, size_t uv,
+		int *errnum)
+{
+	int f;
+	size_t n1;
+	size_t n2;
+
+	*errnum = 0;
+
+	/*
+	 * Check on the requested Unicode version, case conversion, and
+	 * normalization flag values.
+	 */
+
+	if (uv > U8_UNICODE_LATEST) {
+		*errnum = ERANGE;
+		uv = U8_UNICODE_LATEST;
+	}
+
+	if (flag == 0) {
+		flag = U8_STRCMP_CS;
+	} else {
+		f = flag & (U8_STRCMP_CS | U8_STRCMP_CI_UPPER |
+		    U8_STRCMP_CI_LOWER);
+		if (f == 0) {
+			flag |= U8_STRCMP_CS;
+		} else if (f != U8_STRCMP_CS && f != U8_STRCMP_CI_UPPER &&
+		    f != U8_STRCMP_CI_LOWER) {
+			*errnum = EBADF;
+			flag = U8_STRCMP_CS;
+		}
+
+		f = flag & (U8_CANON_DECOMP | U8_COMPAT_DECOMP | U8_CANON_COMP);
+		if (f && f != U8_STRCMP_NFD && f != U8_STRCMP_NFC &&
+		    f != U8_STRCMP_NFKD && f != U8_STRCMP_NFKC) {
+			*errnum = EBADF;
+			flag = U8_STRCMP_CS;
+		}
+	}
+
+	if (flag == U8_STRCMP_CS) {
+		return (n == 0 ? strcmp(s1, s2) : strncmp(s1, s2, n));
+	}
+
+	n1 = strlen(s1);
+	n2 = strlen(s2);
+	if (n != 0) {
+		if (n < n1)
+			n1 = n;
+		if (n < n2)
+			n2 = n;
+	}
+
+	/*
+	 * Simple case conversion can be done much faster and so we do
+	 * them separately here.
+	 */
+	if (flag == U8_STRCMP_CI_UPPER) {
+		return (do_case_compare(uv, (uchar_t *)s1, (uchar_t *)s2,
+		    n1, n2, B_TRUE, errnum));
+	} else if (flag == U8_STRCMP_CI_LOWER) {
+		return (do_case_compare(uv, (uchar_t *)s1, (uchar_t *)s2,
+		    n1, n2, B_FALSE, errnum));
+	}
+
+	return (do_norm_compare(uv, (uchar_t *)s1, (uchar_t *)s2, n1, n2,
+	    flag, errnum));
+}
+
+size_t
+u8_textprep_str(char *inarray, size_t *inlen, char *outarray, size_t *outlen,
+	int flag, size_t unicode_version, int *errnum)
+{
+	int f;
+	int sz;
+	uchar_t *ib;
+	uchar_t *ibtail;
+	uchar_t *ob;
+	uchar_t *obtail;
+	boolean_t do_not_ignore_null;
+	boolean_t do_not_ignore_invalid;
+	boolean_t is_it_toupper;
+	boolean_t is_it_tolower;
+	boolean_t canonical_decomposition;
+	boolean_t compatibility_decomposition;
+	boolean_t canonical_composition;
+	size_t ret_val;
+	size_t i;
+	size_t j;
+	uchar_t u8s[U8_STREAM_SAFE_TEXT_MAX + 1];
+	u8_normalization_states_t state;
+
+	if (unicode_version > U8_UNICODE_LATEST) {
+		*errnum = ERANGE;
+		return ((size_t)-1);
+	}
+
+	f = flag & (U8_TEXTPREP_TOUPPER | U8_TEXTPREP_TOLOWER);
+	if (f == (U8_TEXTPREP_TOUPPER | U8_TEXTPREP_TOLOWER)) {
+		*errnum = EBADF;
+		return ((size_t)-1);
+	}
+
+	f = flag & (U8_CANON_DECOMP | U8_COMPAT_DECOMP | U8_CANON_COMP);
+	if (f && f != U8_TEXTPREP_NFD && f != U8_TEXTPREP_NFC &&
+	    f != U8_TEXTPREP_NFKD && f != U8_TEXTPREP_NFKC) {
+		*errnum = EBADF;
+		return ((size_t)-1);
+	}
+
+	if (inarray == NULL || *inlen == 0)
+		return (0);
+
+	if (outarray == NULL) {
+		*errnum = E2BIG;
+		return ((size_t)-1);
+	}
+
+	ib = (uchar_t *)inarray;
+	ob = (uchar_t *)outarray;
+	ibtail = ib + *inlen;
+	obtail = ob + *outlen;
+
+	do_not_ignore_null = !(flag & U8_TEXTPREP_IGNORE_NULL);
+	do_not_ignore_invalid = !(flag & U8_TEXTPREP_IGNORE_INVALID);
+	is_it_toupper = flag & U8_TEXTPREP_TOUPPER;
+	is_it_tolower = flag & U8_TEXTPREP_TOLOWER;
+
+	ret_val = 0;
+
+	/*
+	 * If we don't have a normalization flag set, we do the simple case
+	 * conversion based text preparation separately below. Text
+	 * preparation involving Normalization will be done in the false task
+	 * block, again, separately since it will take much more time and
+	 * resource than doing simple case conversions.
+	 */
+	if (f == 0) {
+		while (ib < ibtail) {
+			if (*ib == '\0' && do_not_ignore_null)
+				break;
+
+			sz = u8_number_of_bytes[*ib];
+
+			if (sz < 0) {
+				if (do_not_ignore_invalid) {
+					*errnum = EILSEQ;
+					ret_val = (size_t)-1;
+					break;
+				}
+
+				sz = 1;
+				ret_val++;
+			}
+
+			if (sz == 1) {
+				if (ob >= obtail) {
+					*errnum = E2BIG;
+					ret_val = (size_t)-1;
+					break;
+				}
+
+				if (is_it_toupper)
+					*ob = U8_ASCII_TOUPPER(*ib);
+				else if (is_it_tolower)
+					*ob = U8_ASCII_TOLOWER(*ib);
+				else
+					*ob = *ib;
+				ib++;
+				ob++;
+			} else if ((ib + sz) > ibtail) {
+				if (do_not_ignore_invalid) {
+					*errnum = EINVAL;
+					ret_val = (size_t)-1;
+					break;
+				}
+
+				if ((obtail - ob) < (ibtail - ib)) {
+					*errnum = E2BIG;
+					ret_val = (size_t)-1;
+					break;
+				}
+
+				/*
+				 * We treat the remaining incomplete character
+				 * bytes as a character.
+				 */
+				ret_val++;
+
+				while (ib < ibtail)
+					*ob++ = *ib++;
+			} else {
+				if (is_it_toupper || is_it_tolower) {
+					i = do_case_conv(unicode_version, u8s,
+					    ib, sz, is_it_toupper);
+
+					if ((obtail - ob) < i) {
+						*errnum = E2BIG;
+						ret_val = (size_t)-1;
+						break;
+					}
+
+					ib += sz;
+
+					for (sz = 0; sz < i; sz++)
+						*ob++ = u8s[sz];
+				} else {
+					if ((obtail - ob) < sz) {
+						*errnum = E2BIG;
+						ret_val = (size_t)-1;
+						break;
+					}
+
+					for (i = 0; i < sz; i++)
+						*ob++ = *ib++;
+				}
+			}
+		}
+	} else {
+		canonical_decomposition = flag & U8_CANON_DECOMP;
+		compatibility_decomposition = flag & U8_COMPAT_DECOMP;
+		canonical_composition = flag & U8_CANON_COMP;
+
+		while (ib < ibtail) {
+			if (*ib == '\0' && do_not_ignore_null)
+				break;
+
+			/*
+			 * If the current character is a 7-bit ASCII
+			 * character and it is the last character, or,
+			 * if the current character is a 7-bit ASCII
+			 * character and the next character is also a 7-bit
+			 * ASCII character, then, we copy over this
+			 * character without going through collect_a_seq().
+			 *
+			 * In any other cases, we need to look further with
+			 * the collect_a_seq() function.
+			 */
+			if (U8_ISASCII(*ib) && ((ib + 1) >= ibtail ||
+			    ((ib + 1) < ibtail && U8_ISASCII(*(ib + 1))))) {
+				if (ob >= obtail) {
+					*errnum = E2BIG;
+					ret_val = (size_t)-1;
+					break;
+				}
+
+				if (is_it_toupper)
+					*ob = U8_ASCII_TOUPPER(*ib);
+				else if (is_it_tolower)
+					*ob = U8_ASCII_TOLOWER(*ib);
+				else
+					*ob = *ib;
+				ib++;
+				ob++;
+			} else {
+				*errnum = 0;
+				state = U8_STATE_START;
+
+				j = collect_a_seq(unicode_version, u8s,
+				    &ib, ibtail,
+				    is_it_toupper,
+				    is_it_tolower,
+				    canonical_decomposition,
+				    compatibility_decomposition,
+				    canonical_composition,
+				    errnum, &state);
+
+				if (*errnum && do_not_ignore_invalid) {
+					ret_val = (size_t)-1;
+					break;
+				}
+
+				if ((obtail - ob) < j) {
+					*errnum = E2BIG;
+					ret_val = (size_t)-1;
+					break;
+				}
+
+				for (i = 0; i < j; i++)
+					*ob++ = u8s[i];
+			}
+		}
+	}
+
+	*inlen = ibtail - ib;
+	*outlen = obtail - ob;
+
+	return (ret_val);
+}
diff --git a/common/zfs/zfs_comutil.c b/common/zfs/zfs_comutil.c
new file mode 100644
index 000000000000..ed9b67ea3bc9
--- /dev/null
+++ b/common/zfs/zfs_comutil.c
@@ -0,0 +1,202 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * This file is intended for functions that ought to be common between user
+ * land (libzfs) and the kernel. When many common routines need to be shared
+ * then a separate file should to be created.
+ */
+
+#if defined(_KERNEL)
+#include <sys/systm.h>
+#else
+#include <string.h>
+#endif
+
+#include <sys/types.h>
+#include <sys/fs/zfs.h>
+#include <sys/int_limits.h>
+#include <sys/nvpair.h>
+#include "zfs_comutil.h"
+
+/*
+ * Are there allocatable vdevs?
+ */
+boolean_t
+zfs_allocatable_devs(nvlist_t *nv)
+{
+	uint64_t is_log;
+	uint_t c;
+	nvlist_t **child;
+	uint_t children;
+
+	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children) != 0) {
+		return (B_FALSE);
+	}
+	for (c = 0; c < children; c++) {
+		is_log = 0;
+		(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
+		    &is_log);
+		if (!is_log)
+			return (B_TRUE);
+	}
+	return (B_FALSE);
+}
+
+void
+zpool_get_rewind_policy(nvlist_t *nvl, zpool_rewind_policy_t *zrpp)
+{
+	nvlist_t *policy;
+	nvpair_t *elem;
+	char *nm;
+
+	/* Defaults */
+	zrpp->zrp_request = ZPOOL_NO_REWIND;
+	zrpp->zrp_maxmeta = 0;
+	zrpp->zrp_maxdata = UINT64_MAX;
+	zrpp->zrp_txg = UINT64_MAX;
+
+	if (nvl == NULL)
+		return;
+
+	elem = NULL;
+	while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
+		nm = nvpair_name(elem);
+		if (strcmp(nm, ZPOOL_REWIND_POLICY) == 0) {
+			if (nvpair_value_nvlist(elem, &policy) == 0)
+				zpool_get_rewind_policy(policy, zrpp);
+			return;
+		} else if (strcmp(nm, ZPOOL_REWIND_REQUEST) == 0) {
+			if (nvpair_value_uint32(elem, &zrpp->zrp_request) == 0)
+				if (zrpp->zrp_request & ~ZPOOL_REWIND_POLICIES)
+					zrpp->zrp_request = ZPOOL_NO_REWIND;
+		} else if (strcmp(nm, ZPOOL_REWIND_REQUEST_TXG) == 0) {
+			(void) nvpair_value_uint64(elem, &zrpp->zrp_txg);
+		} else if (strcmp(nm, ZPOOL_REWIND_META_THRESH) == 0) {
+			(void) nvpair_value_uint64(elem, &zrpp->zrp_maxmeta);
+		} else if (strcmp(nm, ZPOOL_REWIND_DATA_THRESH) == 0) {
+			(void) nvpair_value_uint64(elem, &zrpp->zrp_maxdata);
+		}
+	}
+	if (zrpp->zrp_request == 0)
+		zrpp->zrp_request = ZPOOL_NO_REWIND;
+}
+
+typedef struct zfs_version_spa_map {
+	int	version_zpl;
+	int	version_spa;
+} zfs_version_spa_map_t;
+
+/*
+ * Keep this table in monotonically increasing version number order.
+ */
+static zfs_version_spa_map_t zfs_version_table[] = {
+	{ZPL_VERSION_INITIAL, SPA_VERSION_INITIAL},
+	{ZPL_VERSION_DIRENT_TYPE, SPA_VERSION_INITIAL},
+	{ZPL_VERSION_FUID, SPA_VERSION_FUID},
+	{ZPL_VERSION_USERSPACE, SPA_VERSION_USERSPACE},
+	{ZPL_VERSION_SA, SPA_VERSION_SA},
+	{0, 0}
+};
+
+/*
+ * Return the max zpl version for a corresponding spa version
+ * -1 is returned if no mapping exists.
+ */
+int
+zfs_zpl_version_map(int spa_version)
+{
+	int i;
+	int version = -1;
+
+	for (i = 0; zfs_version_table[i].version_spa; i++) {
+		if (spa_version >= zfs_version_table[i].version_spa)
+			version = zfs_version_table[i].version_zpl;
+	}
+
+	return (version);
+}
+
+/*
+ * Return the min spa version for a corresponding spa version
+ * -1 is returned if no mapping exists.
+ */
+int
+zfs_spa_version_map(int zpl_version)
+{
+	int i;
+	int version = -1;
+
+	for (i = 0; zfs_version_table[i].version_zpl; i++) {
+		if (zfs_version_table[i].version_zpl >= zpl_version)
+			return (zfs_version_table[i].version_spa);
+	}
+
+	return (version);
+}
+
+const char *zfs_history_event_names[LOG_END] = {
+	"invalid event",
+	"pool create",
+	"vdev add",
+	"pool remove",
+	"pool destroy",
+	"pool export",
+	"pool import",
+	"vdev attach",
+	"vdev replace",
+	"vdev detach",
+	"vdev online",
+	"vdev offline",
+	"vdev upgrade",
+	"pool clear",
+	"pool scrub",
+	"pool property set",
+	"create",
+	"clone",
+	"destroy",
+	"destroy_begin_sync",
+	"inherit",
+	"property set",
+	"quota set",
+	"permission update",
+	"permission remove",
+	"permission who remove",
+	"promote",
+	"receive",
+	"rename",
+	"reservation set",
+	"replay_inc_sync",
+	"replay_full_sync",
+	"rollback",
+	"snapshot",
+	"filesystem version upgrade",
+	"refquota set",
+	"refreservation set",
+	"pool scrub done",
+	"user hold",
+	"user release",
+	"pool split",
+};
diff --git a/common/zfs/zfs_comutil.h b/common/zfs/zfs_comutil.h
new file mode 100644
index 000000000000..61327f9aa909
--- /dev/null
+++ b/common/zfs/zfs_comutil.h
@@ -0,0 +1,46 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_ZFS_COMUTIL_H
+#define	_ZFS_COMUTIL_H
+
+#include <sys/fs/zfs.h>
+#include <sys/types.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+extern boolean_t zfs_allocatable_devs(nvlist_t *);
+extern void zpool_get_rewind_policy(nvlist_t *, zpool_rewind_policy_t *);
+
+extern int zfs_zpl_version_map(int spa_version);
+extern int zfs_spa_version_map(int zpl_version);
+extern const char *zfs_history_event_names[LOG_END];
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _ZFS_COMUTIL_H */
diff --git a/common/zfs/zfs_deleg.c b/common/zfs/zfs_deleg.c
new file mode 100644
index 000000000000..83d9edb21389
--- /dev/null
+++ b/common/zfs/zfs_deleg.c
@@ -0,0 +1,237 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#if defined(_KERNEL)
+#include <sys/systm.h>
+#include <sys/sunddi.h>
+#include <sys/ctype.h>
+#else
+#include <stdio.h>
+#include <unistd.h>
+#include <strings.h>
+#include <libnvpair.h>
+#include <ctype.h>
+#endif
+/* XXX includes zfs_context.h, so why bother with the above? */
+#include <sys/dsl_deleg.h>
+#include "zfs_prop.h"
+#include "zfs_deleg.h"
+#include "zfs_namecheck.h"
+
+/*
+ * permission table
+ *
+ * Keep this table in sorted order
+ *
+ * This table is used for displaying all permissions for
+ * zfs allow
+ */
+
+zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = {
+	{ZFS_DELEG_PERM_ALLOW, ZFS_DELEG_NOTE_ALLOW},
+	{ZFS_DELEG_PERM_CLONE, ZFS_DELEG_NOTE_CLONE },
+	{ZFS_DELEG_PERM_CREATE, ZFS_DELEG_NOTE_CREATE },
+	{ZFS_DELEG_PERM_DESTROY, ZFS_DELEG_NOTE_DESTROY },
+	{ZFS_DELEG_PERM_MOUNT, ZFS_DELEG_NOTE_MOUNT },
+	{ZFS_DELEG_PERM_PROMOTE, ZFS_DELEG_NOTE_PROMOTE },
+	{ZFS_DELEG_PERM_RECEIVE, ZFS_DELEG_NOTE_RECEIVE },
+	{ZFS_DELEG_PERM_RENAME, ZFS_DELEG_NOTE_RENAME },
+	{ZFS_DELEG_PERM_ROLLBACK, ZFS_DELEG_NOTE_ROLLBACK },
+	{ZFS_DELEG_PERM_SNAPSHOT, ZFS_DELEG_NOTE_SNAPSHOT },
+	{ZFS_DELEG_PERM_SHARE, ZFS_DELEG_NOTE_SHARE },
+	{ZFS_DELEG_PERM_SEND, ZFS_DELEG_NOTE_NONE },
+	{ZFS_DELEG_PERM_USERPROP, ZFS_DELEG_NOTE_USERPROP },
+	{ZFS_DELEG_PERM_USERQUOTA, ZFS_DELEG_NOTE_USERQUOTA },
+	{ZFS_DELEG_PERM_GROUPQUOTA, ZFS_DELEG_NOTE_GROUPQUOTA },
+	{ZFS_DELEG_PERM_USERUSED, ZFS_DELEG_NOTE_USERUSED },
+	{ZFS_DELEG_PERM_GROUPUSED, ZFS_DELEG_NOTE_GROUPUSED },
+	{ZFS_DELEG_PERM_HOLD, ZFS_DELEG_NOTE_HOLD },
+	{ZFS_DELEG_PERM_RELEASE, ZFS_DELEG_NOTE_RELEASE },
+	{ZFS_DELEG_PERM_DIFF, ZFS_DELEG_NOTE_DIFF},
+	{NULL, ZFS_DELEG_NOTE_NONE }
+};
+
+static int
+zfs_valid_permission_name(const char *perm)
+{
+	if (zfs_deleg_canonicalize_perm(perm))
+		return (0);
+
+	return (permset_namecheck(perm, NULL, NULL));
+}
+
+const char *
+zfs_deleg_canonicalize_perm(const char *perm)
+{
+	int i;
+	zfs_prop_t prop;
+
+	for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
+		if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
+			return (perm);
+	}
+
+	prop = zfs_name_to_prop(perm);
+	if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
+		return (zfs_prop_to_name(prop));
+	return (NULL);
+
+}
+
+static int
+zfs_validate_who(char *who)
+{
+	char *p;
+
+	if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
+		return (-1);
+
+	switch (who[0]) {
+	case ZFS_DELEG_USER:
+	case ZFS_DELEG_GROUP:
+	case ZFS_DELEG_USER_SETS:
+	case ZFS_DELEG_GROUP_SETS:
+		if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
+			return (-1);
+		for (p = &who[3]; *p; p++)
+			if (!isdigit(*p))
+				return (-1);
+		break;
+
+	case ZFS_DELEG_NAMED_SET:
+	case ZFS_DELEG_NAMED_SET_SETS:
+		if (who[1] != ZFS_DELEG_NA)
+			return (-1);
+		return (permset_namecheck(&who[3], NULL, NULL));
+
+	case ZFS_DELEG_CREATE:
+	case ZFS_DELEG_CREATE_SETS:
+		if (who[1] != ZFS_DELEG_NA)
+			return (-1);
+		if (who[3] != '\0')
+			return (-1);
+		break;
+
+	case ZFS_DELEG_EVERYONE:
+	case ZFS_DELEG_EVERYONE_SETS:
+		if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
+			return (-1);
+		if (who[3] != '\0')
+			return (-1);
+		break;
+
+	default:
+		return (-1);
+	}
+
+	return (0);
+}
+
+int
+zfs_deleg_verify_nvlist(nvlist_t *nvp)
+{
+	nvpair_t *who, *perm_name;
+	nvlist_t *perms;
+	int error;
+
+	if (nvp == NULL)
+		return (-1);
+
+	who = nvlist_next_nvpair(nvp, NULL);
+	if (who == NULL)
+		return (-1);
+
+	do {
+		if (zfs_validate_who(nvpair_name(who)))
+			return (-1);
+
+		error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
+
+		if (error && error != ENOENT)
+			return (-1);
+		if (error == ENOENT)
+			continue;
+
+		perm_name = nvlist_next_nvpair(perms, NULL);
+		if (perm_name == NULL) {
+			return (-1);
+		}
+		do {
+			error = zfs_valid_permission_name(
+			    nvpair_name(perm_name));
+			if (error)
+				return (-1);
+		} while (perm_name = nvlist_next_nvpair(perms, perm_name));
+	} while (who = nvlist_next_nvpair(nvp, who));
+	return (0);
+}
+
+/*
+ * Construct the base attribute name.  The base attribute names
+ * are the "key" to locate the jump objects which contain the actual
+ * permissions.  The base attribute names are encoded based on
+ * type of entry and whether it is a local or descendent permission.
+ *
+ * Arguments:
+ * attr - attribute name return string, attribute is assumed to be
+ *        ZFS_MAX_DELEG_NAME long.
+ * type - type of entry to construct
+ * inheritchr - inheritance type (local,descendent, or NA for create and
+ *                               permission set definitions
+ * data - is either a permission set name or a 64 bit uid/gid.
+ */
+void
+zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
+    char inheritchr, void *data)
+{
+	int len = ZFS_MAX_DELEG_NAME;
+	uint64_t *id = data;
+
+	switch (type) {
+	case ZFS_DELEG_USER:
+	case ZFS_DELEG_GROUP:
+	case ZFS_DELEG_USER_SETS:
+	case ZFS_DELEG_GROUP_SETS:
+		(void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
+		    ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
+		break;
+	case ZFS_DELEG_NAMED_SET_SETS:
+	case ZFS_DELEG_NAMED_SET:
+		(void) snprintf(attr, len, "%c-%c%s", type,
+		    ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
+		break;
+	case ZFS_DELEG_CREATE:
+	case ZFS_DELEG_CREATE_SETS:
+		(void) snprintf(attr, len, "%c-%c", type,
+		    ZFS_DELEG_FIELD_SEP_CHR);
+		break;
+	case ZFS_DELEG_EVERYONE:
+	case ZFS_DELEG_EVERYONE_SETS:
+		(void) snprintf(attr, len, "%c%c%c", type, inheritchr,
+		    ZFS_DELEG_FIELD_SEP_CHR);
+		break;
+	default:
+		ASSERT(!"bad zfs_deleg_who_type_t");
+	}
+}
diff --git a/common/zfs/zfs_deleg.h b/common/zfs/zfs_deleg.h
new file mode 100644
index 000000000000..b4cb8e2b4e37
--- /dev/null
+++ b/common/zfs/zfs_deleg.h
@@ -0,0 +1,85 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_ZFS_DELEG_H
+#define	_ZFS_DELEG_H
+
+#include <sys/fs/zfs.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#define	ZFS_DELEG_SET_NAME_CHR		'@'		/* set name lead char */
+#define	ZFS_DELEG_FIELD_SEP_CHR		'$'		/* field separator */
+
+/*
+ * Max name length for a delegation attribute
+ */
+#define	ZFS_MAX_DELEG_NAME	128
+
+#define	ZFS_DELEG_LOCAL		'l'
+#define	ZFS_DELEG_DESCENDENT	'd'
+#define	ZFS_DELEG_NA		'-'
+
+typedef enum {
+	ZFS_DELEG_NOTE_CREATE,
+	ZFS_DELEG_NOTE_DESTROY,
+	ZFS_DELEG_NOTE_SNAPSHOT,
+	ZFS_DELEG_NOTE_ROLLBACK,
+	ZFS_DELEG_NOTE_CLONE,
+	ZFS_DELEG_NOTE_PROMOTE,
+	ZFS_DELEG_NOTE_RENAME,
+	ZFS_DELEG_NOTE_RECEIVE,
+	ZFS_DELEG_NOTE_ALLOW,
+	ZFS_DELEG_NOTE_USERPROP,
+	ZFS_DELEG_NOTE_MOUNT,
+	ZFS_DELEG_NOTE_SHARE,
+	ZFS_DELEG_NOTE_USERQUOTA,
+	ZFS_DELEG_NOTE_GROUPQUOTA,
+	ZFS_DELEG_NOTE_USERUSED,
+	ZFS_DELEG_NOTE_GROUPUSED,
+	ZFS_DELEG_NOTE_HOLD,
+	ZFS_DELEG_NOTE_RELEASE,
+	ZFS_DELEG_NOTE_DIFF,
+	ZFS_DELEG_NOTE_NONE
+} zfs_deleg_note_t;
+
+typedef struct zfs_deleg_perm_tab {
+	char *z_perm;
+	zfs_deleg_note_t z_note;
+} zfs_deleg_perm_tab_t;
+
+extern zfs_deleg_perm_tab_t zfs_deleg_perm_tab[];
+
+int zfs_deleg_verify_nvlist(nvlist_t *nvlist);
+void zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
+    char checkflag, void *data);
+const char *zfs_deleg_canonicalize_perm(const char *perm);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _ZFS_DELEG_H */
diff --git a/common/zfs/zfs_fletcher.c b/common/zfs/zfs_fletcher.c
new file mode 100644
index 000000000000..fa43ce6bdb5d
--- /dev/null
+++ b/common/zfs/zfs_fletcher.c
@@ -0,0 +1,246 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * Fletcher Checksums
+ * ------------------
+ *
+ * ZFS's 2nd and 4th order Fletcher checksums are defined by the following
+ * recurrence relations:
+ *
+ *	a  = a    + f
+ *	 i    i-1    i-1
+ *
+ *	b  = b    + a
+ *	 i    i-1    i
+ *
+ *	c  = c    + b		(fletcher-4 only)
+ *	 i    i-1    i
+ *
+ *	d  = d    + c		(fletcher-4 only)
+ *	 i    i-1    i
+ *
+ * Where
+ *	a_0 = b_0 = c_0 = d_0 = 0
+ * and
+ *	f_0 .. f_(n-1) are the input data.
+ *
+ * Using standard techniques, these translate into the following series:
+ *
+ *	     __n_			     __n_
+ *	     \   |			     \   |
+ *	a  =  >     f			b  =  >     i * f
+ *	 n   /___|   n - i		 n   /___|	 n - i
+ *	     i = 1			     i = 1
+ *
+ *
+ *	     __n_			     __n_
+ *	     \   |  i*(i+1)		     \   |  i*(i+1)*(i+2)
+ *	c  =  >     ------- f		d  =  >     ------------- f
+ *	 n   /___|     2     n - i	 n   /___|	  6	   n - i
+ *	     i = 1			     i = 1
+ *
+ * For fletcher-2, the f_is are 64-bit, and [ab]_i are 64-bit accumulators.
+ * Since the additions are done mod (2^64), errors in the high bits may not
+ * be noticed.  For this reason, fletcher-2 is deprecated.
+ *
+ * For fletcher-4, the f_is are 32-bit, and [abcd]_i are 64-bit accumulators.
+ * A conservative estimate of how big the buffer can get before we overflow
+ * can be estimated using f_i = 0xffffffff for all i:
+ *
+ * % bc
+ *  f=2^32-1;d=0; for (i = 1; d<2^64; i++) { d += f*i*(i+1)*(i+2)/6 }; (i-1)*4
+ * 2264
+ *  quit
+ * %
+ *
+ * So blocks of up to 2k will not overflow.  Our largest block size is
+ * 128k, which has 32k 4-byte words, so we can compute the largest possible
+ * accumulators, then divide by 2^64 to figure the max amount of overflow:
+ *
+ * % bc
+ *  a=b=c=d=0; f=2^32-1; for (i=1; i<=32*1024; i++) { a+=f; b+=a; c+=b; d+=c }
+ *  a/2^64;b/2^64;c/2^64;d/2^64
+ * 0
+ * 0
+ * 1365
+ * 11186858
+ *  quit
+ * %
+ *
+ * So a and b cannot overflow.  To make sure each bit of input has some
+ * effect on the contents of c and d, we can look at what the factors of
+ * the coefficients in the equations for c_n and d_n are.  The number of 2s
+ * in the factors determines the lowest set bit in the multiplier.  Running
+ * through the cases for n*(n+1)/2 reveals that the highest power of 2 is
+ * 2^14, and for n*(n+1)*(n+2)/6 it is 2^15.  So while some data may overflow
+ * the 64-bit accumulators, every bit of every f_i effects every accumulator,
+ * even for 128k blocks.
+ *
+ * If we wanted to make a stronger version of fletcher4 (fletcher4c?),
+ * we could do our calculations mod (2^32 - 1) by adding in the carries
+ * periodically, and store the number of carries in the top 32-bits.
+ *
+ * --------------------
+ * Checksum Performance
+ * --------------------
+ *
+ * There are two interesting components to checksum performance: cached and
+ * uncached performance.  With cached data, fletcher-2 is about four times
+ * faster than fletcher-4.  With uncached data, the performance difference is
+ * negligible, since the cost of a cache fill dominates the processing time.
+ * Even though fletcher-4 is slower than fletcher-2, it is still a pretty
+ * efficient pass over the data.
+ *
+ * In normal operation, the data which is being checksummed is in a buffer
+ * which has been filled either by:
+ *
+ *	1. a compression step, which will be mostly cached, or
+ *	2. a bcopy() or copyin(), which will be uncached (because the
+ *	   copy is cache-bypassing).
+ *
+ * For both cached and uncached data, both fletcher checksums are much faster
+ * than sha-256, and slower than 'off', which doesn't touch the data at all.
+ */
+
+#include <sys/types.h>
+#include <sys/sysmacros.h>
+#include <sys/byteorder.h>
+#include <sys/zio.h>
+#include <sys/spa.h>
+
+void
+fletcher_2_native(const void *buf, uint64_t size, zio_cksum_t *zcp)
+{
+	const uint64_t *ip = buf;
+	const uint64_t *ipend = ip + (size / sizeof (uint64_t));
+	uint64_t a0, b0, a1, b1;
+
+	for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
+		a0 += ip[0];
+		a1 += ip[1];
+		b0 += a0;
+		b1 += a1;
+	}
+
+	ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1);
+}
+
+void
+fletcher_2_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp)
+{
+	const uint64_t *ip = buf;
+	const uint64_t *ipend = ip + (size / sizeof (uint64_t));
+	uint64_t a0, b0, a1, b1;
+
+	for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
+		a0 += BSWAP_64(ip[0]);
+		a1 += BSWAP_64(ip[1]);
+		b0 += a0;
+		b1 += a1;
+	}
+
+	ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1);
+}
+
+void
+fletcher_4_native(const void *buf, uint64_t size, zio_cksum_t *zcp)
+{
+	const uint32_t *ip = buf;
+	const uint32_t *ipend = ip + (size / sizeof (uint32_t));
+	uint64_t a, b, c, d;
+
+	for (a = b = c = d = 0; ip < ipend; ip++) {
+		a += ip[0];
+		b += a;
+		c += b;
+		d += c;
+	}
+
+	ZIO_SET_CHECKSUM(zcp, a, b, c, d);
+}
+
+void
+fletcher_4_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp)
+{
+	const uint32_t *ip = buf;
+	const uint32_t *ipend = ip + (size / sizeof (uint32_t));
+	uint64_t a, b, c, d;
+
+	for (a = b = c = d = 0; ip < ipend; ip++) {
+		a += BSWAP_32(ip[0]);
+		b += a;
+		c += b;
+		d += c;
+	}
+
+	ZIO_SET_CHECKSUM(zcp, a, b, c, d);
+}
+
+void
+fletcher_4_incremental_native(const void *buf, uint64_t size,
+    zio_cksum_t *zcp)
+{
+	const uint32_t *ip = buf;
+	const uint32_t *ipend = ip + (size / sizeof (uint32_t));
+	uint64_t a, b, c, d;
+
+	a = zcp->zc_word[0];
+	b = zcp->zc_word[1];
+	c = zcp->zc_word[2];
+	d = zcp->zc_word[3];
+
+	for (; ip < ipend; ip++) {
+		a += ip[0];
+		b += a;
+		c += b;
+		d += c;
+	}
+
+	ZIO_SET_CHECKSUM(zcp, a, b, c, d);
+}
+
+void
+fletcher_4_incremental_byteswap(const void *buf, uint64_t size,
+    zio_cksum_t *zcp)
+{
+	const uint32_t *ip = buf;
+	const uint32_t *ipend = ip + (size / sizeof (uint32_t));
+	uint64_t a, b, c, d;
+
+	a = zcp->zc_word[0];
+	b = zcp->zc_word[1];
+	c = zcp->zc_word[2];
+	d = zcp->zc_word[3];
+
+	for (; ip < ipend; ip++) {
+		a += BSWAP_32(ip[0]);
+		b += a;
+		c += b;
+		d += c;
+	}
+
+	ZIO_SET_CHECKSUM(zcp, a, b, c, d);
+}
diff --git a/common/zfs/zfs_fletcher.h b/common/zfs/zfs_fletcher.h
new file mode 100644
index 000000000000..b49df0cf4f0f
--- /dev/null
+++ b/common/zfs/zfs_fletcher.h
@@ -0,0 +1,53 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_ZFS_FLETCHER_H
+#define	_ZFS_FLETCHER_H
+
+#include <sys/types.h>
+#include <sys/spa.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * fletcher checksum functions
+ */
+
+void fletcher_2_native(const void *, uint64_t, zio_cksum_t *);
+void fletcher_2_byteswap(const void *, uint64_t, zio_cksum_t *);
+void fletcher_4_native(const void *, uint64_t, zio_cksum_t *);
+void fletcher_4_byteswap(const void *, uint64_t, zio_cksum_t *);
+void fletcher_4_incremental_native(const void *, uint64_t,
+    zio_cksum_t *);
+void fletcher_4_incremental_byteswap(const void *, uint64_t,
+    zio_cksum_t *);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _ZFS_FLETCHER_H */
diff --git a/common/zfs/zfs_namecheck.c b/common/zfs/zfs_namecheck.c
new file mode 100644
index 000000000000..5cfafea471b3
--- /dev/null
+++ b/common/zfs/zfs_namecheck.c
@@ -0,0 +1,345 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * Common name validation routines for ZFS.  These routines are shared by the
+ * userland code as well as the ioctl() layer to ensure that we don't
+ * inadvertently expose a hole through direct ioctl()s that never gets tested.
+ * In userland, however, we want significantly more information about _why_ the
+ * name is invalid.  In the kernel, we only care whether it's valid or not.
+ * Each routine therefore takes a 'namecheck_err_t' which describes exactly why
+ * the name failed to validate.
+ *
+ * Each function returns 0 on success, -1 on error.
+ */
+
+#if defined(_KERNEL)
+#include <sys/systm.h>
+#else
+#include <string.h>
+#endif
+
+#include <sys/param.h>
+#include <sys/nvpair.h>
+#include "zfs_namecheck.h"
+#include "zfs_deleg.h"
+
+static int
+valid_char(char c)
+{
+	return ((c >= 'a' && c <= 'z') ||
+	    (c >= 'A' && c <= 'Z') ||
+	    (c >= '0' && c <= '9') ||
+	    c == '-' || c == '_' || c == '.' || c == ':' || c == ' ');
+}
+
+/*
+ * Snapshot names must be made up of alphanumeric characters plus the following
+ * characters:
+ *
+ * 	[-_.: ]
+ */
+int
+snapshot_namecheck(const char *path, namecheck_err_t *why, char *what)
+{
+	const char *loc;
+
+	if (strlen(path) >= MAXNAMELEN) {
+		if (why)
+			*why = NAME_ERR_TOOLONG;
+		return (-1);
+	}
+
+	if (path[0] == '\0') {
+		if (why)
+			*why = NAME_ERR_EMPTY_COMPONENT;
+		return (-1);
+	}
+
+	for (loc = path; *loc; loc++) {
+		if (!valid_char(*loc)) {
+			if (why) {
+				*why = NAME_ERR_INVALCHAR;
+				*what = *loc;
+			}
+			return (-1);
+		}
+	}
+	return (0);
+}
+
+
+/*
+ * Permissions set name must start with the letter '@' followed by the
+ * same character restrictions as snapshot names, except that the name
+ * cannot exceed 64 characters.
+ */
+int
+permset_namecheck(const char *path, namecheck_err_t *why, char *what)
+{
+	if (strlen(path) >= ZFS_PERMSET_MAXLEN) {
+		if (why)
+			*why = NAME_ERR_TOOLONG;
+		return (-1);
+	}
+
+	if (path[0] != '@') {
+		if (why) {
+			*why = NAME_ERR_NO_AT;
+			*what = path[0];
+		}
+		return (-1);
+	}
+
+	return (snapshot_namecheck(&path[1], why, what));
+}
+
+/*
+ * Dataset names must be of the following form:
+ *
+ * 	[component][/]*[component][@component]
+ *
+ * Where each component is made up of alphanumeric characters plus the following
+ * characters:
+ *
+ * 	[-_.:%]
+ *
+ * We allow '%' here as we use that character internally to create unique
+ * names for temporary clones (for online recv).
+ */
+int
+dataset_namecheck(const char *path, namecheck_err_t *why, char *what)
+{
+	const char *loc, *end;
+	int found_snapshot;
+
+	/*
+	 * Make sure the name is not too long.
+	 *
+	 * ZFS_MAXNAMELEN is the maximum dataset length used in the userland
+	 * which is the same as MAXNAMELEN used in the kernel.
+	 * If ZFS_MAXNAMELEN value is changed, make sure to cleanup all
+	 * places using MAXNAMELEN.
+	 */
+
+	if (strlen(path) >= MAXNAMELEN) {
+		if (why)
+			*why = NAME_ERR_TOOLONG;
+		return (-1);
+	}
+
+	/* Explicitly check for a leading slash.  */
+	if (path[0] == '/') {
+		if (why)
+			*why = NAME_ERR_LEADING_SLASH;
+		return (-1);
+	}
+
+	if (path[0] == '\0') {
+		if (why)
+			*why = NAME_ERR_EMPTY_COMPONENT;
+		return (-1);
+	}
+
+	loc = path;
+	found_snapshot = 0;
+	for (;;) {
+		/* Find the end of this component */
+		end = loc;
+		while (*end != '/' && *end != '@' && *end != '\0')
+			end++;
+
+		if (*end == '\0' && end[-1] == '/') {
+			/* trailing slashes are not allowed */
+			if (why)
+				*why = NAME_ERR_TRAILING_SLASH;
+			return (-1);
+		}
+
+		/* Zero-length components are not allowed */
+		if (loc == end) {
+			if (why) {
+				/*
+				 * Make sure this is really a zero-length
+				 * component and not a '@@'.
+				 */
+				if (*end == '@' && found_snapshot) {
+					*why = NAME_ERR_MULTIPLE_AT;
+				} else {
+					*why = NAME_ERR_EMPTY_COMPONENT;
+				}
+			}
+
+			return (-1);
+		}
+
+		/* Validate the contents of this component */
+		while (loc != end) {
+			if (!valid_char(*loc) && *loc != '%') {
+				if (why) {
+					*why = NAME_ERR_INVALCHAR;
+					*what = *loc;
+				}
+				return (-1);
+			}
+			loc++;
+		}
+
+		/* If we've reached the end of the string, we're OK */
+		if (*end == '\0')
+			return (0);
+
+		if (*end == '@') {
+			/*
+			 * If we've found an @ symbol, indicate that we're in
+			 * the snapshot component, and report a second '@'
+			 * character as an error.
+			 */
+			if (found_snapshot) {
+				if (why)
+					*why = NAME_ERR_MULTIPLE_AT;
+				return (-1);
+			}
+
+			found_snapshot = 1;
+		}
+
+		/*
+		 * If there is a '/' in a snapshot name
+		 * then report an error
+		 */
+		if (*end == '/' && found_snapshot) {
+			if (why)
+				*why = NAME_ERR_TRAILING_SLASH;
+			return (-1);
+		}
+
+		/* Update to the next component */
+		loc = end + 1;
+	}
+}
+
+
+/*
+ * mountpoint names must be of the following form:
+ *
+ *	/[component][/]*[component][/]
+ */
+int
+mountpoint_namecheck(const char *path, namecheck_err_t *why)
+{
+	const char *start, *end;
+
+	/*
+	 * Make sure none of the mountpoint component names are too long.
+	 * If a component name is too long then the mkdir of the mountpoint
+	 * will fail but then the mountpoint property will be set to a value
+	 * that can never be mounted.  Better to fail before setting the prop.
+	 * Extra slashes are OK, they will be tossed by the mountpoint mkdir.
+	 */
+
+	if (path == NULL || *path != '/') {
+		if (why)
+			*why = NAME_ERR_LEADING_SLASH;
+		return (-1);
+	}
+
+	/* Skip leading slash  */
+	start = &path[1];
+	do {
+		end = start;
+		while (*end != '/' && *end != '\0')
+			end++;
+
+		if (end - start >= MAXNAMELEN) {
+			if (why)
+				*why = NAME_ERR_TOOLONG;
+			return (-1);
+		}
+		start = end + 1;
+
+	} while (*end != '\0');
+
+	return (0);
+}
+
+/*
+ * For pool names, we have the same set of valid characters as described in
+ * dataset names, with the additional restriction that the pool name must begin
+ * with a letter.  The pool names 'raidz' and 'mirror' are also reserved names
+ * that cannot be used.
+ */
+int
+pool_namecheck(const char *pool, namecheck_err_t *why, char *what)
+{
+	const char *c;
+
+	/*
+	 * Make sure the name is not too long.
+	 *
+	 * ZPOOL_MAXNAMELEN is the maximum pool length used in the userland
+	 * which is the same as MAXNAMELEN used in the kernel.
+	 * If ZPOOL_MAXNAMELEN value is changed, make sure to cleanup all
+	 * places using MAXNAMELEN.
+	 */
+	if (strlen(pool) >= MAXNAMELEN) {
+		if (why)
+			*why = NAME_ERR_TOOLONG;
+		return (-1);
+	}
+
+	c = pool;
+	while (*c != '\0') {
+		if (!valid_char(*c)) {
+			if (why) {
+				*why = NAME_ERR_INVALCHAR;
+				*what = *c;
+			}
+			return (-1);
+		}
+		c++;
+	}
+
+	if (!(*pool >= 'a' && *pool <= 'z') &&
+	    !(*pool >= 'A' && *pool <= 'Z')) {
+		if (why)
+			*why = NAME_ERR_NOLETTER;
+		return (-1);
+	}
+
+	if (strcmp(pool, "mirror") == 0 || strcmp(pool, "raidz") == 0) {
+		if (why)
+			*why = NAME_ERR_RESERVED;
+		return (-1);
+	}
+
+	if (pool[0] == 'c' && (pool[1] >= '0' && pool[1] <= '9')) {
+		if (why)
+			*why = NAME_ERR_DISKLIKE;
+		return (-1);
+	}
+
+	return (0);
+}
diff --git a/common/zfs/zfs_namecheck.h b/common/zfs/zfs_namecheck.h
new file mode 100644
index 000000000000..7711da099be9
--- /dev/null
+++ b/common/zfs/zfs_namecheck.h
@@ -0,0 +1,58 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_ZFS_NAMECHECK_H
+#define	_ZFS_NAMECHECK_H
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+	NAME_ERR_LEADING_SLASH,		/* name begins with leading slash */
+	NAME_ERR_EMPTY_COMPONENT,	/* name contains an empty component */
+	NAME_ERR_TRAILING_SLASH,	/* name ends with a slash */
+	NAME_ERR_INVALCHAR,		/* invalid character found */
+	NAME_ERR_MULTIPLE_AT,		/* multiple '@' characters found */
+	NAME_ERR_NOLETTER,		/* pool doesn't begin with a letter */
+	NAME_ERR_RESERVED,		/* entire name is reserved */
+	NAME_ERR_DISKLIKE,		/* reserved disk name (c[0-9].*) */
+	NAME_ERR_TOOLONG,		/* name is too long */
+	NAME_ERR_NO_AT,			/* permission set is missing '@' */
+} namecheck_err_t;
+
+#define	ZFS_PERMSET_MAXLEN	64
+
+int pool_namecheck(const char *, namecheck_err_t *, char *);
+int dataset_namecheck(const char *, namecheck_err_t *, char *);
+int mountpoint_namecheck(const char *, namecheck_err_t *);
+int snapshot_namecheck(const char *, namecheck_err_t *, char *);
+int permset_namecheck(const char *, namecheck_err_t *, char *);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _ZFS_NAMECHECK_H */
diff --git a/common/zfs/zfs_prop.c b/common/zfs/zfs_prop.c
new file mode 100644
index 000000000000..f29bcf62718f
--- /dev/null
+++ b/common/zfs/zfs_prop.c
@@ -0,0 +1,595 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2010 Robert Milkowski */
+
+#include <sys/zio.h>
+#include <sys/spa.h>
+#include <sys/u8_textprep.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/zfs_znode.h>
+
+#include "zfs_prop.h"
+#include "zfs_deleg.h"
+
+#if defined(_KERNEL)
+#include <sys/systm.h>
+#else
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#endif
+
+static zprop_desc_t zfs_prop_table[ZFS_NUM_PROPS];
+
+/* Note this is indexed by zfs_userquota_prop_t, keep the order the same */
+const char *zfs_userquota_prop_prefixes[] = {
+	"userused@",
+	"userquota@",
+	"groupused@",
+	"groupquota@"
+};
+
+zprop_desc_t *
+zfs_prop_get_table(void)
+{
+	return (zfs_prop_table);
+}
+
+void
+zfs_prop_init(void)
+{
+	static zprop_index_t checksum_table[] = {
+		{ "on",		ZIO_CHECKSUM_ON },
+		{ "off",	ZIO_CHECKSUM_OFF },
+		{ "fletcher2",	ZIO_CHECKSUM_FLETCHER_2 },
+		{ "fletcher4",	ZIO_CHECKSUM_FLETCHER_4 },
+		{ "sha256",	ZIO_CHECKSUM_SHA256 },
+		{ NULL }
+	};
+
+	static zprop_index_t dedup_table[] = {
+		{ "on",		ZIO_CHECKSUM_ON },
+		{ "off",	ZIO_CHECKSUM_OFF },
+		{ "verify",	ZIO_CHECKSUM_ON | ZIO_CHECKSUM_VERIFY },
+		{ "sha256",	ZIO_CHECKSUM_SHA256 },
+		{ "sha256,verify",
+				ZIO_CHECKSUM_SHA256 | ZIO_CHECKSUM_VERIFY },
+		{ NULL }
+	};
+
+	static zprop_index_t compress_table[] = {
+		{ "on",		ZIO_COMPRESS_ON },
+		{ "off",	ZIO_COMPRESS_OFF },
+		{ "lzjb",	ZIO_COMPRESS_LZJB },
+		{ "gzip",	ZIO_COMPRESS_GZIP_6 },	/* gzip default */
+		{ "gzip-1",	ZIO_COMPRESS_GZIP_1 },
+		{ "gzip-2",	ZIO_COMPRESS_GZIP_2 },
+		{ "gzip-3",	ZIO_COMPRESS_GZIP_3 },
+		{ "gzip-4",	ZIO_COMPRESS_GZIP_4 },
+		{ "gzip-5",	ZIO_COMPRESS_GZIP_5 },
+		{ "gzip-6",	ZIO_COMPRESS_GZIP_6 },
+		{ "gzip-7",	ZIO_COMPRESS_GZIP_7 },
+		{ "gzip-8",	ZIO_COMPRESS_GZIP_8 },
+		{ "gzip-9",	ZIO_COMPRESS_GZIP_9 },
+		{ "zle",	ZIO_COMPRESS_ZLE },
+		{ NULL }
+	};
+
+	static zprop_index_t snapdir_table[] = {
+		{ "hidden",	ZFS_SNAPDIR_HIDDEN },
+		{ "visible",	ZFS_SNAPDIR_VISIBLE },
+		{ NULL }
+	};
+
+	static zprop_index_t acl_inherit_table[] = {
+		{ "discard",	ZFS_ACL_DISCARD },
+		{ "noallow",	ZFS_ACL_NOALLOW },
+		{ "restricted",	ZFS_ACL_RESTRICTED },
+		{ "passthrough", ZFS_ACL_PASSTHROUGH },
+		{ "secure",	ZFS_ACL_RESTRICTED }, /* bkwrd compatability */
+		{ "passthrough-x", ZFS_ACL_PASSTHROUGH_X },
+		{ NULL }
+	};
+
+	static zprop_index_t case_table[] = {
+		{ "sensitive",		ZFS_CASE_SENSITIVE },
+		{ "insensitive",	ZFS_CASE_INSENSITIVE },
+		{ "mixed",		ZFS_CASE_MIXED },
+		{ NULL }
+	};
+
+	static zprop_index_t copies_table[] = {
+		{ "1",		1 },
+		{ "2",		2 },
+		{ "3",		3 },
+		{ NULL }
+	};
+
+	/*
+	 * Use the unique flags we have to send to u8_strcmp() and/or
+	 * u8_textprep() to represent the various normalization property
+	 * values.
+	 */
+	static zprop_index_t normalize_table[] = {
+		{ "none",	0 },
+		{ "formD",	U8_TEXTPREP_NFD },
+		{ "formKC",	U8_TEXTPREP_NFKC },
+		{ "formC",	U8_TEXTPREP_NFC },
+		{ "formKD",	U8_TEXTPREP_NFKD },
+		{ NULL }
+	};
+
+	static zprop_index_t version_table[] = {
+		{ "1",		1 },
+		{ "2",		2 },
+		{ "3",		3 },
+		{ "4",		4 },
+		{ "5",		5 },
+		{ "current",	ZPL_VERSION },
+		{ NULL }
+	};
+
+	static zprop_index_t boolean_table[] = {
+		{ "off",	0 },
+		{ "on",		1 },
+		{ NULL }
+	};
+
+	static zprop_index_t logbias_table[] = {
+		{ "latency",	ZFS_LOGBIAS_LATENCY },
+		{ "throughput",	ZFS_LOGBIAS_THROUGHPUT },
+		{ NULL }
+	};
+
+	static zprop_index_t canmount_table[] = {
+		{ "off",	ZFS_CANMOUNT_OFF },
+		{ "on",		ZFS_CANMOUNT_ON },
+		{ "noauto",	ZFS_CANMOUNT_NOAUTO },
+		{ NULL }
+	};
+
+	static zprop_index_t cache_table[] = {
+		{ "none",	ZFS_CACHE_NONE },
+		{ "metadata",	ZFS_CACHE_METADATA },
+		{ "all",	ZFS_CACHE_ALL },
+		{ NULL }
+	};
+
+	static zprop_index_t sync_table[] = {
+		{ "standard",	ZFS_SYNC_STANDARD },
+		{ "always",	ZFS_SYNC_ALWAYS },
+		{ "disabled",	ZFS_SYNC_DISABLED },
+		{ NULL }
+	};
+
+	/* inherit index properties */
+	zprop_register_index(ZFS_PROP_SYNC, "sync", ZFS_SYNC_STANDARD,
+	    PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
+	    "standard | always | disabled", "SYNC",
+	    sync_table);
+	zprop_register_index(ZFS_PROP_CHECKSUM, "checksum",
+	    ZIO_CHECKSUM_DEFAULT, PROP_INHERIT, ZFS_TYPE_FILESYSTEM |
+	    ZFS_TYPE_VOLUME,
+	    "on | off | fletcher2 | fletcher4 | sha256", "CHECKSUM",
+	    checksum_table);
+	zprop_register_index(ZFS_PROP_DEDUP, "dedup", ZIO_CHECKSUM_OFF,
+	    PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
+	    "on | off | verify | sha256[,verify]", "DEDUP",
+	    dedup_table);
+	zprop_register_index(ZFS_PROP_COMPRESSION, "compression",
+	    ZIO_COMPRESS_DEFAULT, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
+	    "on | off | lzjb | gzip | gzip-[1-9] | zle", "COMPRESS",
+	    compress_table);
+	zprop_register_index(ZFS_PROP_SNAPDIR, "snapdir", ZFS_SNAPDIR_HIDDEN,
+	    PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
+	    "hidden | visible", "SNAPDIR", snapdir_table);
+	zprop_register_index(ZFS_PROP_ACLINHERIT, "aclinherit",
+	    ZFS_ACL_RESTRICTED, PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
+	    "discard | noallow | restricted | passthrough | passthrough-x",
+	    "ACLINHERIT", acl_inherit_table);
+	zprop_register_index(ZFS_PROP_COPIES, "copies", 1, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
+	    "1 | 2 | 3", "COPIES", copies_table);
+	zprop_register_index(ZFS_PROP_PRIMARYCACHE, "primarycache",
+	    ZFS_CACHE_ALL, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT | ZFS_TYPE_VOLUME,
+	    "all | none | metadata", "PRIMARYCACHE", cache_table);
+	zprop_register_index(ZFS_PROP_SECONDARYCACHE, "secondarycache",
+	    ZFS_CACHE_ALL, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT | ZFS_TYPE_VOLUME,
+	    "all | none | metadata", "SECONDARYCACHE", cache_table);
+	zprop_register_index(ZFS_PROP_LOGBIAS, "logbias", ZFS_LOGBIAS_LATENCY,
+	    PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
+	    "latency | throughput", "LOGBIAS", logbias_table);
+
+	/* inherit index (boolean) properties */
+	zprop_register_index(ZFS_PROP_ATIME, "atime", 1, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM, "on | off", "ATIME", boolean_table);
+	zprop_register_index(ZFS_PROP_DEVICES, "devices", 1, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "DEVICES",
+	    boolean_table);
+	zprop_register_index(ZFS_PROP_EXEC, "exec", 1, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "EXEC",
+	    boolean_table);
+	zprop_register_index(ZFS_PROP_SETUID, "setuid", 1, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "SETUID",
+	    boolean_table);
+	zprop_register_index(ZFS_PROP_READONLY, "readonly", 0, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "on | off", "RDONLY",
+	    boolean_table);
+	zprop_register_index(ZFS_PROP_ZONED, "zoned", 0, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM, "on | off", "ZONED", boolean_table);
+	zprop_register_index(ZFS_PROP_XATTR, "xattr", 1, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "XATTR",
+	    boolean_table);
+	zprop_register_index(ZFS_PROP_VSCAN, "vscan", 0, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM, "on | off", "VSCAN",
+	    boolean_table);
+	zprop_register_index(ZFS_PROP_NBMAND, "nbmand", 0, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "NBMAND",
+	    boolean_table);
+
+	/* default index properties */
+	zprop_register_index(ZFS_PROP_VERSION, "version", 0, PROP_DEFAULT,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
+	    "1 | 2 | 3 | 4 | current", "VERSION", version_table);
+	zprop_register_index(ZFS_PROP_CANMOUNT, "canmount", ZFS_CANMOUNT_ON,
+	    PROP_DEFAULT, ZFS_TYPE_FILESYSTEM, "on | off | noauto",
+	    "CANMOUNT", canmount_table);
+
+	/* readonly index (boolean) properties */
+	zprop_register_index(ZFS_PROP_MOUNTED, "mounted", 0, PROP_READONLY,
+	    ZFS_TYPE_FILESYSTEM, "yes | no", "MOUNTED", boolean_table);
+	zprop_register_index(ZFS_PROP_DEFER_DESTROY, "defer_destroy", 0,
+	    PROP_READONLY, ZFS_TYPE_SNAPSHOT, "yes | no", "DEFER_DESTROY",
+	    boolean_table);
+
+	/* set once index properties */
+	zprop_register_index(ZFS_PROP_NORMALIZE, "normalization", 0,
+	    PROP_ONETIME, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
+	    "none | formC | formD | formKC | formKD", "NORMALIZATION",
+	    normalize_table);
+	zprop_register_index(ZFS_PROP_CASE, "casesensitivity",
+	    ZFS_CASE_SENSITIVE, PROP_ONETIME, ZFS_TYPE_FILESYSTEM |
+	    ZFS_TYPE_SNAPSHOT,
+	    "sensitive | insensitive | mixed", "CASE", case_table);
+
+	/* set once index (boolean) properties */
+	zprop_register_index(ZFS_PROP_UTF8ONLY, "utf8only", 0, PROP_ONETIME,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
+	    "on | off", "UTF8ONLY", boolean_table);
+
+	/* string properties */
+	zprop_register_string(ZFS_PROP_ORIGIN, "origin", NULL, PROP_READONLY,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<snapshot>", "ORIGIN");
+	zprop_register_string(ZFS_PROP_MOUNTPOINT, "mountpoint", "/",
+	    PROP_INHERIT, ZFS_TYPE_FILESYSTEM, "<path> | legacy | none",
+	    "MOUNTPOINT");
+	zprop_register_string(ZFS_PROP_SHARENFS, "sharenfs", "off",
+	    PROP_INHERIT, ZFS_TYPE_FILESYSTEM, "on | off | share(1M) options",
+	    "SHARENFS");
+	zprop_register_string(ZFS_PROP_TYPE, "type", NULL, PROP_READONLY,
+	    ZFS_TYPE_DATASET, "filesystem | volume | snapshot", "TYPE");
+	zprop_register_string(ZFS_PROP_SHARESMB, "sharesmb", "off",
+	    PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
+	    "on | off | sharemgr(1M) options", "SHARESMB");
+	zprop_register_string(ZFS_PROP_MLSLABEL, "mlslabel",
+	    ZFS_MLSLABEL_DEFAULT, PROP_INHERIT, ZFS_TYPE_DATASET,
+	    "<sensitivity label>", "MLSLABEL");
+
+	/* readonly number properties */
+	zprop_register_number(ZFS_PROP_USED, "used", 0, PROP_READONLY,
+	    ZFS_TYPE_DATASET, "<size>", "USED");
+	zprop_register_number(ZFS_PROP_AVAILABLE, "available", 0, PROP_READONLY,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "AVAIL");
+	zprop_register_number(ZFS_PROP_REFERENCED, "referenced", 0,
+	    PROP_READONLY, ZFS_TYPE_DATASET, "<size>", "REFER");
+	zprop_register_number(ZFS_PROP_COMPRESSRATIO, "compressratio", 0,
+	    PROP_READONLY, ZFS_TYPE_DATASET,
+	    "<1.00x or higher if compressed>", "RATIO");
+	zprop_register_number(ZFS_PROP_VOLBLOCKSIZE, "volblocksize",
+	    ZVOL_DEFAULT_BLOCKSIZE, PROP_ONETIME,
+	    ZFS_TYPE_VOLUME, "512 to 128k, power of 2",	"VOLBLOCK");
+	zprop_register_number(ZFS_PROP_USEDSNAP, "usedbysnapshots", 0,
+	    PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>",
+	    "USEDSNAP");
+	zprop_register_number(ZFS_PROP_USEDDS, "usedbydataset", 0,
+	    PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>",
+	    "USEDDS");
+	zprop_register_number(ZFS_PROP_USEDCHILD, "usedbychildren", 0,
+	    PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>",
+	    "USEDCHILD");
+	zprop_register_number(ZFS_PROP_USEDREFRESERV, "usedbyrefreservation", 0,
+	    PROP_READONLY,
+	    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "USEDREFRESERV");
+	zprop_register_number(ZFS_PROP_USERREFS, "userrefs", 0, PROP_READONLY,
+	    ZFS_TYPE_SNAPSHOT, "<count>", "USERREFS");
+
+	/* default number properties */
+	zprop_register_number(ZFS_PROP_QUOTA, "quota", 0, PROP_DEFAULT,
+	    ZFS_TYPE_FILESYSTEM, "<size> | none", "QUOTA");
+	zprop_register_number(ZFS_PROP_RESERVATION, "reservation", 0,
+	    PROP_DEFAULT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
+	    "<size> | none", "RESERV");
+	zprop_register_number(ZFS_PROP_VOLSIZE, "volsize", 0, PROP_DEFAULT,
+	    ZFS_TYPE_VOLUME, "<size>", "VOLSIZE");
+	zprop_register_number(ZFS_PROP_REFQUOTA, "refquota", 0, PROP_DEFAULT,
+	    ZFS_TYPE_FILESYSTEM, "<size> | none", "REFQUOTA");
+	zprop_register_number(ZFS_PROP_REFRESERVATION, "refreservation", 0,
+	    PROP_DEFAULT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
+	    "<size> | none", "REFRESERV");
+
+	/* inherit number properties */
+	zprop_register_number(ZFS_PROP_RECORDSIZE, "recordsize",
+	    SPA_MAXBLOCKSIZE, PROP_INHERIT,
+	    ZFS_TYPE_FILESYSTEM, "512 to 128k, power of 2", "RECSIZE");
+
+	/* hidden properties */
+	zprop_register_hidden(ZFS_PROP_CREATETXG, "createtxg", PROP_TYPE_NUMBER,
+	    PROP_READONLY, ZFS_TYPE_DATASET, "CREATETXG");
+	zprop_register_hidden(ZFS_PROP_NUMCLONES, "numclones", PROP_TYPE_NUMBER,
+	    PROP_READONLY, ZFS_TYPE_SNAPSHOT, "NUMCLONES");
+	zprop_register_hidden(ZFS_PROP_NAME, "name", PROP_TYPE_STRING,
+	    PROP_READONLY, ZFS_TYPE_DATASET, "NAME");
+	zprop_register_hidden(ZFS_PROP_ISCSIOPTIONS, "iscsioptions",
+	    PROP_TYPE_STRING, PROP_INHERIT, ZFS_TYPE_VOLUME, "ISCSIOPTIONS");
+	zprop_register_hidden(ZFS_PROP_STMF_SHAREINFO, "stmf_sbd_lu",
+	    PROP_TYPE_STRING, PROP_INHERIT, ZFS_TYPE_VOLUME,
+	    "STMF_SBD_LU");
+	zprop_register_hidden(ZFS_PROP_GUID, "guid", PROP_TYPE_NUMBER,
+	    PROP_READONLY, ZFS_TYPE_DATASET, "GUID");
+	zprop_register_hidden(ZFS_PROP_USERACCOUNTING, "useraccounting",
+	    PROP_TYPE_NUMBER, PROP_READONLY, ZFS_TYPE_DATASET,
+	    "USERACCOUNTING");
+	zprop_register_hidden(ZFS_PROP_UNIQUE, "unique", PROP_TYPE_NUMBER,
+	    PROP_READONLY, ZFS_TYPE_DATASET, "UNIQUE");
+	zprop_register_hidden(ZFS_PROP_OBJSETID, "objsetid", PROP_TYPE_NUMBER,
+	    PROP_READONLY, ZFS_TYPE_DATASET, "OBJSETID");
+
+	/*
+	 * Property to be removed once libbe is integrated
+	 */
+	zprop_register_hidden(ZFS_PROP_PRIVATE, "priv_prop",
+	    PROP_TYPE_NUMBER, PROP_READONLY, ZFS_TYPE_FILESYSTEM,
+	    "PRIV_PROP");
+
+	/* oddball properties */
+	zprop_register_impl(ZFS_PROP_CREATION, "creation", PROP_TYPE_NUMBER, 0,
+	    NULL, PROP_READONLY, ZFS_TYPE_DATASET,
+	    "<date>", "CREATION", B_FALSE, B_TRUE, NULL);
+}
+
+boolean_t
+zfs_prop_delegatable(zfs_prop_t prop)
+{
+	zprop_desc_t *pd = &zfs_prop_table[prop];
+
+	/* The mlslabel property is never delegatable. */
+	if (prop == ZFS_PROP_MLSLABEL)
+		return (B_FALSE);
+
+	return (pd->pd_attr != PROP_READONLY);
+}
+
+/*
+ * Given a zfs dataset property name, returns the corresponding property ID.
+ */
+zfs_prop_t
+zfs_name_to_prop(const char *propname)
+{
+	return (zprop_name_to_prop(propname, ZFS_TYPE_DATASET));
+}
+
+/*
+ * For user property names, we allow all lowercase alphanumeric characters, plus
+ * a few useful punctuation characters.
+ */
+static int
+valid_char(char c)
+{
+	return ((c >= 'a' && c <= 'z') ||
+	    (c >= '0' && c <= '9') ||
+	    c == '-' || c == '_' || c == '.' || c == ':');
+}
+
+/*
+ * Returns true if this is a valid user-defined property (one with a ':').
+ */
+boolean_t
+zfs_prop_user(const char *name)
+{
+	int i;
+	char c;
+	boolean_t foundsep = B_FALSE;
+
+	for (i = 0; i < strlen(name); i++) {
+		c = name[i];
+		if (!valid_char(c))
+			return (B_FALSE);
+		if (c == ':')
+			foundsep = B_TRUE;
+	}
+
+	if (!foundsep)
+		return (B_FALSE);
+
+	return (B_TRUE);
+}
+
+/*
+ * Returns true if this is a valid userspace-type property (one with a '@').
+ * Note that after the @, any character is valid (eg, another @, for SID
+ * user@domain).
+ */
+boolean_t
+zfs_prop_userquota(const char *name)
+{
+	zfs_userquota_prop_t prop;
+
+	for (prop = 0; prop < ZFS_NUM_USERQUOTA_PROPS; prop++) {
+		if (strncmp(name, zfs_userquota_prop_prefixes[prop],
+		    strlen(zfs_userquota_prop_prefixes[prop])) == 0) {
+			return (B_TRUE);
+		}
+	}
+
+	return (B_FALSE);
+}
+
+/*
+ * Tables of index types, plus functions to convert between the user view
+ * (strings) and internal representation (uint64_t).
+ */
+int
+zfs_prop_string_to_index(zfs_prop_t prop, const char *string, uint64_t *index)
+{
+	return (zprop_string_to_index(prop, string, index, ZFS_TYPE_DATASET));
+}
+
+int
+zfs_prop_index_to_string(zfs_prop_t prop, uint64_t index, const char **string)
+{
+	return (zprop_index_to_string(prop, index, string, ZFS_TYPE_DATASET));
+}
+
+uint64_t
+zfs_prop_random_value(zfs_prop_t prop, uint64_t seed)
+{
+	return (zprop_random_value(prop, seed, ZFS_TYPE_DATASET));
+}
+
+/*
+ * Returns TRUE if the property applies to any of the given dataset types.
+ */
+boolean_t
+zfs_prop_valid_for_type(int prop, zfs_type_t types)
+{
+	return (zprop_valid_for_type(prop, types));
+}
+
+zprop_type_t
+zfs_prop_get_type(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_proptype);
+}
+
+/*
+ * Returns TRUE if the property is readonly.
+ */
+boolean_t
+zfs_prop_readonly(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_attr == PROP_READONLY ||
+	    zfs_prop_table[prop].pd_attr == PROP_ONETIME);
+}
+
+/*
+ * Returns TRUE if the property is only allowed to be set once.
+ */
+boolean_t
+zfs_prop_setonce(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_attr == PROP_ONETIME);
+}
+
+const char *
+zfs_prop_default_string(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_strdefault);
+}
+
+uint64_t
+zfs_prop_default_numeric(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_numdefault);
+}
+
+/*
+ * Given a dataset property ID, returns the corresponding name.
+ * Assuming the zfs dataset property ID is valid.
+ */
+const char *
+zfs_prop_to_name(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_name);
+}
+
+/*
+ * Returns TRUE if the property is inheritable.
+ */
+boolean_t
+zfs_prop_inheritable(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_attr == PROP_INHERIT ||
+	    zfs_prop_table[prop].pd_attr == PROP_ONETIME);
+}
+
+#ifndef _KERNEL
+
+/*
+ * Returns a string describing the set of acceptable values for the given
+ * zfs property, or NULL if it cannot be set.
+ */
+const char *
+zfs_prop_values(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_values);
+}
+
+/*
+ * Returns TRUE if this property is a string type.  Note that index types
+ * (compression, checksum) are treated as strings in userland, even though they
+ * are stored numerically on disk.
+ */
+int
+zfs_prop_is_string(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_proptype == PROP_TYPE_STRING ||
+	    zfs_prop_table[prop].pd_proptype == PROP_TYPE_INDEX);
+}
+
+/*
+ * Returns the column header for the given property.  Used only in
+ * 'zfs list -o', but centralized here with the other property information.
+ */
+const char *
+zfs_prop_column_name(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_colname);
+}
+
+/*
+ * Returns whether the given property should be displayed right-justified for
+ * 'zfs list'.
+ */
+boolean_t
+zfs_prop_align_right(zfs_prop_t prop)
+{
+	return (zfs_prop_table[prop].pd_rightalign);
+}
+
+#endif
diff --git a/common/zfs/zfs_prop.h b/common/zfs/zfs_prop.h
new file mode 100644
index 000000000000..a63262311b3d
--- /dev/null
+++ b/common/zfs/zfs_prop.h
@@ -0,0 +1,129 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_ZFS_PROP_H
+#define	_ZFS_PROP_H
+
+#include <sys/fs/zfs.h>
+#include <sys/types.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * For index types (e.g. compression and checksum), we want the numeric value
+ * in the kernel, but the string value in userland.
+ */
+typedef enum {
+	PROP_TYPE_NUMBER,	/* numeric value */
+	PROP_TYPE_STRING,	/* string value */
+	PROP_TYPE_INDEX		/* numeric value indexed by string */
+} zprop_type_t;
+
+typedef enum {
+	PROP_DEFAULT,
+	PROP_READONLY,
+	PROP_INHERIT,
+	/*
+	 * ONETIME properties are a sort of conglomeration of READONLY
+	 * and INHERIT.  They can be set only during object creation,
+	 * after that they are READONLY.  If not explicitly set during
+	 * creation, they can be inherited.
+	 */
+	PROP_ONETIME
+} zprop_attr_t;
+
+typedef struct zfs_index {
+	const char *pi_name;
+	uint64_t pi_value;
+} zprop_index_t;
+
+typedef struct {
+	const char *pd_name;		/* human-readable property name */
+	int pd_propnum;			/* property number */
+	zprop_type_t pd_proptype;	/* string, boolean, index, number */
+	const char *pd_strdefault;	/* default for strings */
+	uint64_t pd_numdefault;		/* for boolean / index / number */
+	zprop_attr_t pd_attr;		/* default, readonly, inherit */
+	int pd_types;			/* bitfield of valid dataset types */
+					/* fs | vol | snap; or pool */
+	const char *pd_values;		/* string telling acceptable values */
+	const char *pd_colname;		/* column header for "zfs list" */
+	boolean_t pd_rightalign;	/* column alignment for "zfs list" */
+	boolean_t pd_visible;		/* do we list this property with the */
+					/* "zfs get" help message */
+	const zprop_index_t *pd_table;	/* for index properties, a table */
+					/* defining the possible values */
+	size_t pd_table_size;		/* number of entries in pd_table[] */
+} zprop_desc_t;
+
+/*
+ * zfs dataset property functions
+ */
+void zfs_prop_init(void);
+zprop_type_t zfs_prop_get_type(zfs_prop_t);
+boolean_t zfs_prop_delegatable(zfs_prop_t prop);
+zprop_desc_t *zfs_prop_get_table(void);
+
+/*
+ * zpool property functions
+ */
+void zpool_prop_init(void);
+zprop_type_t zpool_prop_get_type(zpool_prop_t);
+zprop_desc_t *zpool_prop_get_table(void);
+
+/*
+ * Common routines to initialize property tables
+ */
+void zprop_register_impl(int, const char *, zprop_type_t, uint64_t,
+    const char *, zprop_attr_t, int, const char *, const char *,
+    boolean_t, boolean_t, const zprop_index_t *);
+void zprop_register_string(int, const char *, const char *,
+    zprop_attr_t attr, int, const char *, const char *);
+void zprop_register_number(int, const char *, uint64_t, zprop_attr_t, int,
+    const char *, const char *);
+void zprop_register_index(int, const char *, uint64_t, zprop_attr_t, int,
+    const char *, const char *, const zprop_index_t *);
+void zprop_register_hidden(int, const char *, zprop_type_t, zprop_attr_t,
+    int, const char *);
+
+/*
+ * Common routines for zfs and zpool property management
+ */
+int zprop_iter_common(zprop_func, void *, boolean_t, boolean_t, zfs_type_t);
+int zprop_name_to_prop(const char *, zfs_type_t);
+int zprop_string_to_index(int, const char *, uint64_t *, zfs_type_t);
+int zprop_index_to_string(int, uint64_t, const char **, zfs_type_t);
+uint64_t zprop_random_value(int, uint64_t, zfs_type_t);
+const char *zprop_values(int, zfs_type_t);
+size_t zprop_width(int, boolean_t *, zfs_type_t);
+boolean_t zprop_valid_for_type(int, zfs_type_t);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _ZFS_PROP_H */
diff --git a/common/zfs/zpool_prop.c b/common/zfs/zpool_prop.c
new file mode 100644
index 000000000000..988d05de6e20
--- /dev/null
+++ b/common/zfs/zpool_prop.c
@@ -0,0 +1,202 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zio.h>
+#include <sys/spa.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/fs/zfs.h>
+
+#include "zfs_prop.h"
+
+#if defined(_KERNEL)
+#include <sys/systm.h>
+#else
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#endif
+
+static zprop_desc_t zpool_prop_table[ZPOOL_NUM_PROPS];
+
+zprop_desc_t *
+zpool_prop_get_table(void)
+{
+	return (zpool_prop_table);
+}
+
+void
+zpool_prop_init(void)
+{
+	static zprop_index_t boolean_table[] = {
+		{ "off",	0},
+		{ "on",		1},
+		{ NULL }
+	};
+
+	static zprop_index_t failuremode_table[] = {
+		{ "wait",	ZIO_FAILURE_MODE_WAIT },
+		{ "continue",	ZIO_FAILURE_MODE_CONTINUE },
+		{ "panic",	ZIO_FAILURE_MODE_PANIC },
+		{ NULL }
+	};
+
+	/* string properties */
+	zprop_register_string(ZPOOL_PROP_ALTROOT, "altroot", NULL, PROP_DEFAULT,
+	    ZFS_TYPE_POOL, "<path>", "ALTROOT");
+	zprop_register_string(ZPOOL_PROP_BOOTFS, "bootfs", NULL, PROP_DEFAULT,
+	    ZFS_TYPE_POOL, "<filesystem>", "BOOTFS");
+	zprop_register_string(ZPOOL_PROP_CACHEFILE, "cachefile", NULL,
+	    PROP_DEFAULT, ZFS_TYPE_POOL, "<file> | none", "CACHEFILE");
+
+	/* readonly number properties */
+	zprop_register_number(ZPOOL_PROP_SIZE, "size", 0, PROP_READONLY,
+	    ZFS_TYPE_POOL, "<size>", "SIZE");
+	zprop_register_number(ZPOOL_PROP_FREE, "free", 0, PROP_READONLY,
+	    ZFS_TYPE_POOL, "<size>", "FREE");
+	zprop_register_number(ZPOOL_PROP_ALLOCATED, "allocated", 0,
+	    PROP_READONLY, ZFS_TYPE_POOL, "<size>", "ALLOC");
+	zprop_register_number(ZPOOL_PROP_CAPACITY, "capacity", 0, PROP_READONLY,
+	    ZFS_TYPE_POOL, "<size>", "CAP");
+	zprop_register_number(ZPOOL_PROP_GUID, "guid", 0, PROP_READONLY,
+	    ZFS_TYPE_POOL, "<guid>", "GUID");
+	zprop_register_number(ZPOOL_PROP_HEALTH, "health", 0, PROP_READONLY,
+	    ZFS_TYPE_POOL, "<state>", "HEALTH");
+	zprop_register_number(ZPOOL_PROP_DEDUPRATIO, "dedupratio", 0,
+	    PROP_READONLY, ZFS_TYPE_POOL, "<1.00x or higher if deduped>",
+	    "DEDUP");
+
+	/* default number properties */
+	zprop_register_number(ZPOOL_PROP_VERSION, "version", SPA_VERSION,
+	    PROP_DEFAULT, ZFS_TYPE_POOL, "<version>", "VERSION");
+	zprop_register_number(ZPOOL_PROP_DEDUPDITTO, "dedupditto", 0,
+	    PROP_DEFAULT, ZFS_TYPE_POOL, "<threshold (min 100)>", "DEDUPDITTO");
+
+	/* default index (boolean) properties */
+	zprop_register_index(ZPOOL_PROP_DELEGATION, "delegation", 1,
+	    PROP_DEFAULT, ZFS_TYPE_POOL, "on | off", "DELEGATION",
+	    boolean_table);
+	zprop_register_index(ZPOOL_PROP_AUTOREPLACE, "autoreplace", 0,
+	    PROP_DEFAULT, ZFS_TYPE_POOL, "on | off", "REPLACE", boolean_table);
+	zprop_register_index(ZPOOL_PROP_LISTSNAPS, "listsnapshots", 0,
+	    PROP_DEFAULT, ZFS_TYPE_POOL, "on | off", "LISTSNAPS",
+	    boolean_table);
+	zprop_register_index(ZPOOL_PROP_AUTOEXPAND, "autoexpand", 0,
+	    PROP_DEFAULT, ZFS_TYPE_POOL, "on | off", "EXPAND", boolean_table);
+	zprop_register_index(ZPOOL_PROP_READONLY, "readonly", 0,
+	    PROP_DEFAULT, ZFS_TYPE_POOL, "on | off", "RDONLY", boolean_table);
+
+	/* default index properties */
+	zprop_register_index(ZPOOL_PROP_FAILUREMODE, "failmode",
+	    ZIO_FAILURE_MODE_WAIT, PROP_DEFAULT, ZFS_TYPE_POOL,
+	    "wait | continue | panic", "FAILMODE", failuremode_table);
+
+	/* hidden properties */
+	zprop_register_hidden(ZPOOL_PROP_NAME, "name", PROP_TYPE_STRING,
+	    PROP_READONLY, ZFS_TYPE_POOL, "NAME");
+}
+
+/*
+ * Given a property name and its type, returns the corresponding property ID.
+ */
+zpool_prop_t
+zpool_name_to_prop(const char *propname)
+{
+	return (zprop_name_to_prop(propname, ZFS_TYPE_POOL));
+}
+
+/*
+ * Given a pool property ID, returns the corresponding name.
+ * Assuming the pool propety ID is valid.
+ */
+const char *
+zpool_prop_to_name(zpool_prop_t prop)
+{
+	return (zpool_prop_table[prop].pd_name);
+}
+
+zprop_type_t
+zpool_prop_get_type(zpool_prop_t prop)
+{
+	return (zpool_prop_table[prop].pd_proptype);
+}
+
+boolean_t
+zpool_prop_readonly(zpool_prop_t prop)
+{
+	return (zpool_prop_table[prop].pd_attr == PROP_READONLY);
+}
+
+const char *
+zpool_prop_default_string(zpool_prop_t prop)
+{
+	return (zpool_prop_table[prop].pd_strdefault);
+}
+
+uint64_t
+zpool_prop_default_numeric(zpool_prop_t prop)
+{
+	return (zpool_prop_table[prop].pd_numdefault);
+}
+
+int
+zpool_prop_string_to_index(zpool_prop_t prop, const char *string,
+    uint64_t *index)
+{
+	return (zprop_string_to_index(prop, string, index, ZFS_TYPE_POOL));
+}
+
+int
+zpool_prop_index_to_string(zpool_prop_t prop, uint64_t index,
+    const char **string)
+{
+	return (zprop_index_to_string(prop, index, string, ZFS_TYPE_POOL));
+}
+
+uint64_t
+zpool_prop_random_value(zpool_prop_t prop, uint64_t seed)
+{
+	return (zprop_random_value(prop, seed, ZFS_TYPE_POOL));
+}
+
+#ifndef _KERNEL
+
+const char *
+zpool_prop_values(zpool_prop_t prop)
+{
+	return (zpool_prop_table[prop].pd_values);
+}
+
+const char *
+zpool_prop_column_name(zpool_prop_t prop)
+{
+	return (zpool_prop_table[prop].pd_colname);
+}
+
+boolean_t
+zpool_prop_align_right(zpool_prop_t prop)
+{
+	return (zpool_prop_table[prop].pd_rightalign);
+}
+#endif
diff --git a/common/zfs/zprop_common.c b/common/zfs/zprop_common.c
new file mode 100644
index 000000000000..0bbf20d4f02c
--- /dev/null
+++ b/common/zfs/zprop_common.c
@@ -0,0 +1,426 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * Common routines used by zfs and zpool property management.
+ */
+
+#include <sys/zio.h>
+#include <sys/spa.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/zfs_znode.h>
+#include <sys/fs/zfs.h>
+
+#include "zfs_prop.h"
+#include "zfs_deleg.h"
+
+#if defined(_KERNEL)
+#include <sys/systm.h>
+#include <util/qsort.h>
+#else
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#endif
+
+static zprop_desc_t *
+zprop_get_proptable(zfs_type_t type)
+{
+	if (type == ZFS_TYPE_POOL)
+		return (zpool_prop_get_table());
+	else
+		return (zfs_prop_get_table());
+}
+
+static int
+zprop_get_numprops(zfs_type_t type)
+{
+	if (type == ZFS_TYPE_POOL)
+		return (ZPOOL_NUM_PROPS);
+	else
+		return (ZFS_NUM_PROPS);
+}
+
+void
+zprop_register_impl(int prop, const char *name, zprop_type_t type,
+    uint64_t numdefault, const char *strdefault, zprop_attr_t attr,
+    int objset_types, const char *values, const char *colname,
+    boolean_t rightalign, boolean_t visible, const zprop_index_t *idx_tbl)
+{
+	zprop_desc_t *prop_tbl = zprop_get_proptable(objset_types);
+	zprop_desc_t *pd;
+
+	pd = &prop_tbl[prop];
+
+	ASSERT(pd->pd_name == NULL || pd->pd_name == name);
+	ASSERT(name != NULL);
+	ASSERT(colname != NULL);
+
+	pd->pd_name = name;
+	pd->pd_propnum = prop;
+	pd->pd_proptype = type;
+	pd->pd_numdefault = numdefault;
+	pd->pd_strdefault = strdefault;
+	pd->pd_attr = attr;
+	pd->pd_types = objset_types;
+	pd->pd_values = values;
+	pd->pd_colname = colname;
+	pd->pd_rightalign = rightalign;
+	pd->pd_visible = visible;
+	pd->pd_table = idx_tbl;
+	pd->pd_table_size = 0;
+	while (idx_tbl && (idx_tbl++)->pi_name != NULL)
+		pd->pd_table_size++;
+}
+
+void
+zprop_register_string(int prop, const char *name, const char *def,
+    zprop_attr_t attr, int objset_types, const char *values,
+    const char *colname)
+{
+	zprop_register_impl(prop, name, PROP_TYPE_STRING, 0, def, attr,
+	    objset_types, values, colname, B_FALSE, B_TRUE, NULL);
+
+}
+
+void
+zprop_register_number(int prop, const char *name, uint64_t def,
+    zprop_attr_t attr, int objset_types, const char *values,
+    const char *colname)
+{
+	zprop_register_impl(prop, name, PROP_TYPE_NUMBER, def, NULL, attr,
+	    objset_types, values, colname, B_TRUE, B_TRUE, NULL);
+}
+
+void
+zprop_register_index(int prop, const char *name, uint64_t def,
+    zprop_attr_t attr, int objset_types, const char *values,
+    const char *colname, const zprop_index_t *idx_tbl)
+{
+	zprop_register_impl(prop, name, PROP_TYPE_INDEX, def, NULL, attr,
+	    objset_types, values, colname, B_TRUE, B_TRUE, idx_tbl);
+}
+
+void
+zprop_register_hidden(int prop, const char *name, zprop_type_t type,
+    zprop_attr_t attr, int objset_types, const char *colname)
+{
+	zprop_register_impl(prop, name, type, 0, NULL, attr,
+	    objset_types, NULL, colname, B_FALSE, B_FALSE, NULL);
+}
+
+
+/*
+ * A comparison function we can use to order indexes into property tables.
+ */
+static int
+zprop_compare(const void *arg1, const void *arg2)
+{
+	const zprop_desc_t *p1 = *((zprop_desc_t **)arg1);
+	const zprop_desc_t *p2 = *((zprop_desc_t **)arg2);
+	boolean_t p1ro, p2ro;
+
+	p1ro = (p1->pd_attr == PROP_READONLY);
+	p2ro = (p2->pd_attr == PROP_READONLY);
+
+	if (p1ro == p2ro)
+		return (strcmp(p1->pd_name, p2->pd_name));
+
+	return (p1ro ? -1 : 1);
+}
+
+/*
+ * Iterate over all properties in the given property table, calling back
+ * into the specified function for each property. We will continue to
+ * iterate until we either reach the end or the callback function returns
+ * something other than ZPROP_CONT.
+ */
+int
+zprop_iter_common(zprop_func func, void *cb, boolean_t show_all,
+    boolean_t ordered, zfs_type_t type)
+{
+	int i, num_props, size, prop;
+	zprop_desc_t *prop_tbl;
+	zprop_desc_t **order;
+
+	prop_tbl = zprop_get_proptable(type);
+	num_props = zprop_get_numprops(type);
+	size = num_props * sizeof (zprop_desc_t *);
+
+#if defined(_KERNEL)
+	order = kmem_alloc(size, KM_SLEEP);
+#else
+	if ((order = malloc(size)) == NULL)
+		return (ZPROP_CONT);
+#endif
+
+	for (int j = 0; j < num_props; j++)
+		order[j] = &prop_tbl[j];
+
+	if (ordered) {
+		qsort((void *)order, num_props, sizeof (zprop_desc_t *),
+		    zprop_compare);
+	}
+
+	prop = ZPROP_CONT;
+	for (i = 0; i < num_props; i++) {
+		if ((order[i]->pd_visible || show_all) &&
+		    (func(order[i]->pd_propnum, cb) != ZPROP_CONT)) {
+			prop = order[i]->pd_propnum;
+			break;
+		}
+	}
+
+#if defined(_KERNEL)
+	kmem_free(order, size);
+#else
+	free(order);
+#endif
+	return (prop);
+}
+
+static boolean_t
+propname_match(const char *p, size_t len, zprop_desc_t *prop_entry)
+{
+	const char *propname = prop_entry->pd_name;
+#ifndef _KERNEL
+	const char *colname = prop_entry->pd_colname;
+	int c;
+#endif
+
+	if (len == strlen(propname) &&
+	    strncmp(p, propname, len) == 0)
+		return (B_TRUE);
+
+#ifndef _KERNEL
+	if (colname == NULL || len != strlen(colname))
+		return (B_FALSE);
+
+	for (c = 0; c < len; c++)
+		if (p[c] != tolower(colname[c]))
+			break;
+
+	return (colname[c] == '\0');
+#else
+	return (B_FALSE);
+#endif
+}
+
+typedef struct name_to_prop_cb {
+	const char *propname;
+	zprop_desc_t *prop_tbl;
+} name_to_prop_cb_t;
+
+static int
+zprop_name_to_prop_cb(int prop, void *cb_data)
+{
+	name_to_prop_cb_t *data = cb_data;
+
+	if (propname_match(data->propname, strlen(data->propname),
+	    &data->prop_tbl[prop]))
+		return (prop);
+
+	return (ZPROP_CONT);
+}
+
+int
+zprop_name_to_prop(const char *propname, zfs_type_t type)
+{
+	int prop;
+	name_to_prop_cb_t cb_data;
+
+	cb_data.propname = propname;
+	cb_data.prop_tbl = zprop_get_proptable(type);
+
+	prop = zprop_iter_common(zprop_name_to_prop_cb, &cb_data,
+	    B_TRUE, B_FALSE, type);
+
+	return (prop == ZPROP_CONT ? ZPROP_INVAL : prop);
+}
+
+int
+zprop_string_to_index(int prop, const char *string, uint64_t *index,
+    zfs_type_t type)
+{
+	zprop_desc_t *prop_tbl;
+	const zprop_index_t *idx_tbl;
+	int i;
+
+	if (prop == ZPROP_INVAL || prop == ZPROP_CONT)
+		return (-1);
+
+	ASSERT(prop < zprop_get_numprops(type));
+	prop_tbl = zprop_get_proptable(type);
+	if ((idx_tbl = prop_tbl[prop].pd_table) == NULL)
+		return (-1);
+
+	for (i = 0; idx_tbl[i].pi_name != NULL; i++) {
+		if (strcmp(string, idx_tbl[i].pi_name) == 0) {
+			*index = idx_tbl[i].pi_value;
+			return (0);
+		}
+	}
+
+	return (-1);
+}
+
+int
+zprop_index_to_string(int prop, uint64_t index, const char **string,
+    zfs_type_t type)
+{
+	zprop_desc_t *prop_tbl;
+	const zprop_index_t *idx_tbl;
+	int i;
+
+	if (prop == ZPROP_INVAL || prop == ZPROP_CONT)
+		return (-1);
+
+	ASSERT(prop < zprop_get_numprops(type));
+	prop_tbl = zprop_get_proptable(type);
+	if ((idx_tbl = prop_tbl[prop].pd_table) == NULL)
+		return (-1);
+
+	for (i = 0; idx_tbl[i].pi_name != NULL; i++) {
+		if (idx_tbl[i].pi_value == index) {
+			*string = idx_tbl[i].pi_name;
+			return (0);
+		}
+	}
+
+	return (-1);
+}
+
+/*
+ * Return a random valid property value.  Used by ztest.
+ */
+uint64_t
+zprop_random_value(int prop, uint64_t seed, zfs_type_t type)
+{
+	zprop_desc_t *prop_tbl;
+	const zprop_index_t *idx_tbl;
+
+	ASSERT((uint_t)prop < zprop_get_numprops(type));
+	prop_tbl = zprop_get_proptable(type);
+	idx_tbl = prop_tbl[prop].pd_table;
+
+	if (idx_tbl == NULL)
+		return (seed);
+
+	return (idx_tbl[seed % prop_tbl[prop].pd_table_size].pi_value);
+}
+
+const char *
+zprop_values(int prop, zfs_type_t type)
+{
+	zprop_desc_t *prop_tbl;
+
+	ASSERT(prop != ZPROP_INVAL && prop != ZPROP_CONT);
+	ASSERT(prop < zprop_get_numprops(type));
+
+	prop_tbl = zprop_get_proptable(type);
+
+	return (prop_tbl[prop].pd_values);
+}
+
+/*
+ * Returns TRUE if the property applies to any of the given dataset types.
+ */
+boolean_t
+zprop_valid_for_type(int prop, zfs_type_t type)
+{
+	zprop_desc_t *prop_tbl;
+
+	if (prop == ZPROP_INVAL || prop == ZPROP_CONT)
+		return (B_FALSE);
+
+	ASSERT(prop < zprop_get_numprops(type));
+	prop_tbl = zprop_get_proptable(type);
+	return ((prop_tbl[prop].pd_types & type) != 0);
+}
+
+#ifndef _KERNEL
+
+/*
+ * Determines the minimum width for the column, and indicates whether it's fixed
+ * or not.  Only string columns are non-fixed.
+ */
+size_t
+zprop_width(int prop, boolean_t *fixed, zfs_type_t type)
+{
+	zprop_desc_t *prop_tbl, *pd;
+	const zprop_index_t *idx;
+	size_t ret;
+	int i;
+
+	ASSERT(prop != ZPROP_INVAL && prop != ZPROP_CONT);
+	ASSERT(prop < zprop_get_numprops(type));
+
+	prop_tbl = zprop_get_proptable(type);
+	pd = &prop_tbl[prop];
+
+	*fixed = B_TRUE;
+
+	/*
+	 * Start with the width of the column name.
+	 */
+	ret = strlen(pd->pd_colname);
+
+	/*
+	 * For fixed-width values, make sure the width is large enough to hold
+	 * any possible value.
+	 */
+	switch (pd->pd_proptype) {
+	case PROP_TYPE_NUMBER:
+		/*
+		 * The maximum length of a human-readable number is 5 characters
+		 * ("20.4M", for example).
+		 */
+		if (ret < 5)
+			ret = 5;
+		/*
+		 * 'creation' is handled specially because it's a number
+		 * internally, but displayed as a date string.
+		 */
+		if (prop == ZFS_PROP_CREATION)
+			*fixed = B_FALSE;
+		break;
+	case PROP_TYPE_INDEX:
+		idx = prop_tbl[prop].pd_table;
+		for (i = 0; idx[i].pi_name != NULL; i++) {
+			if (strlen(idx[i].pi_name) > ret)
+				ret = strlen(idx[i].pi_name);
+		}
+		break;
+
+	case PROP_TYPE_STRING:
+		*fixed = B_FALSE;
+		break;
+	}
+
+	return (ret);
+}
+
+#endif
diff --git a/uts/common/Makefile.files b/uts/common/Makefile.files
new file mode 100644
index 000000000000..ec08410b4ff3
--- /dev/null
+++ b/uts/common/Makefile.files
@@ -0,0 +1,2007 @@
+#
+# CDDL HEADER START
+#
+# The contents of this file are subject to the terms of the
+# Common Development and Distribution License (the "License").
+# You may not use this file except in compliance with the License.
+#
+# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+# or http://www.opensolaris.org/os/licensing.
+# See the License for the specific language governing permissions
+# and limitations under the License.
+#
+# When distributing Covered Code, include this CDDL HEADER in each
+# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+# If applicable, add the following below this CDDL HEADER, with the
+# fields enclosed by brackets "[]" replaced with your own identifying
+# information: Portions Copyright [yyyy] [name of copyright owner]
+#
+# CDDL HEADER END
+#
+
+#
+# Copyright (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved.
+#
+
+#
+# This Makefile defines all file modules for the directory uts/common
+# and its children. These are the source files which may be considered
+# common to all SunOS systems.
+
+i386_CORE_OBJS += \
+		atomic.o	\
+		avintr.o	\
+		pic.o
+
+sparc_CORE_OBJS +=
+
+COMMON_CORE_OBJS +=		\
+		beep.o		\
+		bitset.o	\
+		bp_map.o	\
+		brand.o		\
+		cpucaps.o	\
+		cmt.o		\
+		cmt_policy.o	\
+		cpu.o		\
+		cpu_event.o	\
+		cpu_intr.o	\
+		cpu_pm.o	\
+		cpupart.o	\
+		cap_util.o	\
+		disp.o		\
+		group.o		\
+		kstat_fr.o	\
+		iscsiboot_prop.o	\
+		lgrp.o		\
+		lgrp_topo.o	\
+		mmapobj.o	\
+		mutex.o		\
+		page_lock.o	\
+		page_retire.o	\
+		panic.o		\
+		param.o		\
+		pg.o		\
+		pghw.o		\
+		putnext.o	\
+		rctl_proc.o	\
+		rwlock.o	\
+		seg_kmem.o	\
+		softint.o	\
+		string.o	\
+		strtol.o	\
+		strtoul.o	\
+		strtoll.o	\
+		strtoull.o	\
+		thread_intr.o	\
+		vm_page.o	\
+		vm_pagelist.o	\
+		zlib_obj.o	\
+		clock_tick.o
+
+CORE_OBJS +=	$(COMMON_CORE_OBJS) $($(MACH)_CORE_OBJS)
+
+ZLIB_OBJS =	zutil.o zmod.o zmod_subr.o \
+		adler32.o crc32.o deflate.o inffast.o \
+		inflate.o inftrees.o trees.o
+
+GENUNIX_OBJS +=	\
+		access.o	\
+		acl.o		\
+		acl_common.o	\
+		adjtime.o	\
+		alarm.o		\
+		aio_subr.o	\
+		auditsys.o	\
+		audit_core.o	\
+		audit_zone.o	\
+		audit_memory.o	\
+		autoconf.o	\
+		avl.o		\
+		bdev_dsort.o	\
+		bio.o		\
+		bitmap.o	\
+		blabel.o	\
+		brandsys.o	\
+		bz2blocksort.o	\
+		bz2compress.o	\
+		bz2decompress.o	\
+		bz2randtable.o	\
+		bz2bzlib.o	\
+		bz2crctable.o	\
+		bz2huffman.o	\
+		callb.o		\
+		callout.o	\
+		chdir.o		\
+		chmod.o		\
+		chown.o		\
+		cladm.o		\
+		class.o		\
+		clock.o		\
+		clock_highres.o	\
+		clock_realtime.o\
+		close.o		\
+		compress.o	\
+		condvar.o	\
+		conf.o		\
+		console.o	\
+		contract.o	\
+		copyops.o	\
+		core.o		\
+		corectl.o	\
+		cred.o		\
+		cs_stubs.o	\
+		dacf.o		\
+		dacf_clnt.o	\
+		damap.o	\
+		cyclic.o	\
+		ddi.o		\
+		ddifm.o		\
+		ddi_hp_impl.o	\
+		ddi_hp_ndi.o	\
+		ddi_intr.o	\
+		ddi_intr_impl.o	\
+		ddi_intr_irm.o	\
+		ddi_nodeid.o	\
+		ddi_timer.o	\
+		devcfg.o	\
+		devcache.o	\
+		device.o	\
+		devid.o		\
+		devid_cache.o	\
+		devid_scsi.o	\
+		devid_smp.o	\
+		devpolicy.o	\
+		disp_lock.o	\
+		dnlc.o		\
+		driver.o	\
+		dumpsubr.o	\
+		driver_lyr.o	\
+		dtrace_subr.o	\
+		errorq.o	\
+		etheraddr.o	\
+		evchannels.o	\
+		exacct.o	\
+		exacct_core.o	\
+		exec.o		\
+		exit.o		\
+		fbio.o		\
+		fcntl.o		\
+		fdbuffer.o	\
+		fdsync.o	\
+		fem.o		\
+		ffs.o		\
+		fio.o		\
+		flock.o		\
+		fm.o		\
+		fork.o		\
+		vpm.o		\
+		fs_reparse.o	\
+		fs_subr.o	\
+		fsflush.o	\
+		ftrace.o	\
+		getcwd.o	\
+		getdents.o	\
+		getloadavg.o	\
+		getpagesizes.o	\
+		getpid.o	\
+		gfs.o		\
+		rusagesys.o	\
+		gid.o		\
+		groups.o	\
+		grow.o		\
+		hat.o		\
+		hat_refmod.o	\
+		id32.o		\
+		id_space.o	\
+		inet_ntop.o	\
+		instance.o	\
+		ioctl.o		\
+		ip_cksum.o	\
+		issetugid.o	\
+		ippconf.o	\
+		kcpc.o		\
+		kdi.o		\
+		kiconv.o	\
+		klpd.o		\
+		kmem.o		\
+		ksyms_snapshot.o	\
+		l_strplumb.o	\
+		labelsys.o	\
+		link.o		\
+		list.o		\
+		lockstat_subr.o	\
+		log_sysevent.o	\
+		logsubr.o	\
+		lookup.o	\
+		lseek.o		\
+		ltos.o		\
+		lwp.o		\
+		lwp_create.o	\
+		lwp_info.o	\
+		lwp_self.o	\
+		lwp_sobj.o	\
+		lwp_timer.o	\
+		lwpsys.o	\
+		main.o		\
+		mmapobjsys.o	\
+		memcntl.o	\
+		memstr.o	\
+		lgrpsys.o	\
+		mkdir.o		\
+		mknod.o		\
+		mount.o		\
+		move.o		\
+		msacct.o	\
+		multidata.o	\
+		nbmlock.o	\
+		ndifm.o		\
+		nice.o		\
+		netstack.o	\
+		ntptime.o	\
+		nvpair.o	\
+		nvpair_alloc_system.o	\
+		nvpair_alloc_fixed.o	\
+		octet.o		\
+		open.o		\
+		p_online.o	\
+		pathconf.o	\
+		pathname.o	\
+		pause.o		\
+		serializer.o	\
+		pci_intr_lib.o	\
+		pci_cap.o	\
+		pcifm.o		\
+		pgrp.o		\
+		pgrpsys.o	\
+		pid.o		\
+		pkp_hash.o	\
+		policy.o	\
+		poll.o		\
+		pool.o		\
+		pool_pset.o	\
+		port_subr.o	\
+		ppriv.o		\
+		printf.o	\
+		priocntl.o	\
+		priv.o		\
+		priv_const.o	\
+		proc.o		\
+		procset.o	\
+		processor_bind.o	\
+		processor_info.o	\
+		profil.o	\
+		project.o	\
+		qsort.o		\
+		rctl.o		\
+		rctlsys.o	\
+		readlink.o	\
+		refstr.o	\
+		rename.o	\
+		resolvepath.o	\
+		retire_store.o	\
+		process.o	\
+		rlimit.o	\
+		rmap.o		\
+		rw.o		\
+		rwstlock.o	\
+		sad_conf.o	\
+		sid.o		\
+		sidsys.o	\
+		sched.o		\
+		schedctl.o	\
+		sctp_crc32.o	\
+		seg_dev.o	\
+		seg_kp.o	\
+		seg_kpm.o	\
+		seg_map.o	\
+		seg_vn.o	\
+		seg_spt.o	\
+		semaphore.o	\
+		sendfile.o	\
+		session.o	\
+		share.o		\
+		shuttle.o	\
+		sig.o		\
+		sigaction.o	\
+		sigaltstack.o	\
+		signotify.o	\
+		sigpending.o	\
+		sigprocmask.o	\
+		sigqueue.o	\
+		sigsendset.o	\
+		sigsuspend.o	\
+		sigtimedwait.o	\
+		sleepq.o	\
+		sock_conf.o	\
+		space.o		\
+		sscanf.o	\
+		stat.o		\
+		statfs.o	\
+		statvfs.o	\
+		stol.o		\
+		str_conf.o	\
+		strcalls.o	\
+		stream.o	\
+		streamio.o	\
+		strext.o	\
+		strsubr.o	\
+		strsun.o	\
+		subr.o		\
+		sunddi.o	\
+		sunmdi.o	\
+		sunndi.o	\
+		sunpci.o	\
+		sunpm.o		\
+		sundlpi.o	\
+		suntpi.o	\
+		swap_subr.o	\
+		swap_vnops.o	\
+		symlink.o	\
+		sync.o		\
+		sysclass.o	\
+		sysconfig.o	\
+		sysent.o	\
+		sysfs.o		\
+		systeminfo.o	\
+		task.o		\
+		taskq.o		\
+		tasksys.o	\
+		time.o		\
+		timer.o		\
+		times.o		\
+		timers.o	\
+		thread.o	\
+		tlabel.o	\
+		tnf_res.o	\
+		turnstile.o	\
+		tty_common.o	\
+		u8_textprep.o	\
+		uadmin.o	\
+		uconv.o		\
+		ucredsys.o	\
+		uid.o		\
+		umask.o		\
+		umount.o	\
+		uname.o		\
+		unix_bb.o	\
+		unlink.o	\
+		urw.o		\
+		utime.o		\
+		utssys.o	\
+		uucopy.o	\
+		vfs.o		\
+		vfs_conf.o	\
+		vmem.o		\
+		vm_anon.o	\
+		vm_as.o		\
+		vm_meter.o	\
+		vm_pageout.o	\
+		vm_pvn.o	\
+		vm_rm.o		\
+		vm_seg.o	\
+		vm_subr.o	\
+		vm_swap.o	\
+		vm_usage.o	\
+		vnode.o		\
+		vuid_queue.o	\
+		vuid_store.o	\
+		waitq.o		\
+		watchpoint.o	\
+		yield.o		\
+		scsi_confdata.o	\
+		xattr.o		\
+		xattr_common.o	\
+		xdr_mblk.o	\
+		xdr_mem.o	\
+		xdr.o		\
+		xdr_array.o	\
+		xdr_refer.o	\
+		xhat.o		\
+		zone.o
+
+#
+#	Stubs for the stand-alone linker/loader
+#
+sparc_GENSTUBS_OBJS =	\
+	kobj_stubs.o
+
+i386_GENSTUBS_OBJS =
+
+COMMON_GENSTUBS_OBJS =
+
+GENSTUBS_OBJS += $(COMMON_GENSTUBS_OBJS) $($(MACH)_GENSTUBS_OBJS)
+
+#
+#	DTrace and DTrace Providers
+#
+DTRACE_OBJS += dtrace.o dtrace_isa.o dtrace_asm.o
+
+SDT_OBJS += sdt_subr.o
+
+PROFILE_OBJS += profile.o
+
+SYSTRACE_OBJS += systrace.o
+
+LOCKSTAT_OBJS += lockstat.o
+
+FASTTRAP_OBJS += fasttrap.o fasttrap_isa.o
+
+DCPC_OBJS += dcpc.o
+
+#
+#	Driver (pseudo-driver) Modules
+#
+IPP_OBJS +=	ippctl.o
+
+AUDIO_OBJS += audio_client.o audio_ddi.o audio_engine.o \
+	   audio_fltdata.o audio_format.o audio_ctrl.o \
+	   audio_grc3.o audio_output.o audio_input.o \
+	   audio_oss.o audio_sun.o
+
+AUDIOEMU10K_OBJS += audioemu10k.o
+
+AUDIOENS_OBJS += audioens.o
+
+AUDIOVIA823X_OBJS += audiovia823x.o
+
+AUDIOVIA97_OBJS += audiovia97.o
+
+AUDIO1575_OBJS += audio1575.o
+
+AUDIO810_OBJS += audio810.o
+
+AUDIOCMI_OBJS += audiocmi.o
+
+AUDIOHD_OBJS +=	audiohd.o
+
+AUDIOIXP_OBJS += audioixp.o
+
+AUDIOLS_OBJS += audiols.o
+
+AUDIOP16X_OBJS += audiop16x.o
+
+AUDIOPCI_OBJS += audiopci.o
+
+AUDIOSOLO_OBJS += audiosolo.o
+
+AUDIOTS_OBJS +=	audiots.o
+
+AC97_OBJS += ac97.o ac97_ad.o ac97_alc.o ac97_cmi.o
+
+BLKDEV_OBJS += blkdev.o
+
+CARDBUS_OBJS += cardbus.o cardbus_hp.o cardbus_cfg.o
+
+CONSKBD_OBJS += conskbd.o
+
+CONSMS_OBJS +=	consms.o
+
+OLDPTY_OBJS +=	tty_ptyconf.o
+
+PTC_OBJS +=	tty_pty.o
+
+PTSL_OBJS +=	tty_pts.o
+
+PTM_OBJS +=	ptm.o
+
+MII_OBJS +=	mii.o mii_cicada.o mii_natsemi.o mii_intel.o mii_qualsemi.o \
+		mii_marvell.o mii_realtek.o mii_other.o
+
+PTS_OBJS +=	pts.o
+
+PTY_OBJS +=	ptms_conf.o
+
+SAD_OBJS +=	sad.o
+
+MD4_OBJS +=	md4.o md4_mod.o
+
+MD5_OBJS +=	md5.o md5_mod.o
+
+SHA1_OBJS +=	sha1.o sha1_mod.o fips_sha1_util.o
+
+SHA2_OBJS +=	sha2.o sha2_mod.o fips_sha2_util.o
+
+IPGPC_OBJS +=   classifierddi.o classifier.o filters.o trie.o table.o \
+		ba_table.o
+
+DSCPMK_OBJS +=	dscpmk.o dscpmkddi.o
+
+DLCOSMK_OBJS +=	dlcosmk.o dlcosmkddi.o
+
+FLOWACCT_OBJS +=	flowacctddi.o flowacct.o
+
+TOKENMT_OBJS +=	tokenmt.o tokenmtddi.o
+
+TSWTCL_OBJS +=	tswtcl.o tswtclddi.o
+
+ARP_OBJS +=	arpddi.o
+
+ICMP_OBJS +=	icmpddi.o
+
+ICMP6_OBJS +=	icmp6ddi.o
+
+RTS_OBJS +=	rtsddi.o
+
+IP_ICMP_OBJS =	icmp.o icmp_opt_data.o
+IP_RTS_OBJS =	rts.o rts_opt_data.o
+IP_TCP_OBJS =	tcp.o tcp_fusion.o tcp_opt_data.o tcp_sack.o tcp_stats.o \
+		tcp_misc.o tcp_timers.o tcp_time_wait.o tcp_tpi.o tcp_output.o \
+		tcp_input.o tcp_socket.o tcp_bind.o tcp_cluster.o tcp_tunables.o
+IP_UDP_OBJS =	udp.o udp_opt_data.o udp_tunables.o udp_stats.o
+IP_SCTP_OBJS =	sctp.o sctp_opt_data.o sctp_output.o \
+		sctp_init.o sctp_input.o sctp_cookie.o \
+		sctp_conn.o sctp_error.o sctp_snmp.o \
+		sctp_tunables.o sctp_shutdown.o sctp_common.o \
+		sctp_timer.o sctp_heartbeat.o sctp_hash.o \
+		sctp_bind.o sctp_notify.o sctp_asconf.o \
+		sctp_addr.o tn_ipopt.o tnet.o ip_netinfo.o \
+		sctp_misc.o
+IP_ILB_OBJS =	ilb.o ilb_nat.o ilb_conn.o ilb_alg_hash.o ilb_alg_rr.o
+
+IP_OBJS +=	igmp.o ipmp.o ip.o ip6.o ip6_asp.o ip6_if.o ip6_ire.o \
+		ip6_rts.o ip_if.o ip_ire.o ip_listutils.o ip_mroute.o \
+		ip_multi.o ip2mac.o ip_ndp.o ip_rts.o ip_srcid.o \
+		ipddi.o ipdrop.o mi.o nd.o tunables.o optcom.o snmpcom.o \
+		ipsec_loader.o spd.o ipclassifier.o inet_common.o ip_squeue.o \
+		squeue.o ip_sadb.o ip_ftable.o proto_set.o radix.o ip_dummy.o \
+		ip_helper_stream.o ip_tunables.o \
+		ip_output.o ip_input.o ip6_input.o ip6_output.o ip_arp.o \
+		conn_opt.o ip_attr.o ip_dce.o \
+		$(IP_ICMP_OBJS) \
+		$(IP_RTS_OBJS) \
+		$(IP_TCP_OBJS) \
+		$(IP_UDP_OBJS) \
+		$(IP_SCTP_OBJS) \
+		$(IP_ILB_OBJS)
+
+IP6_OBJS +=	ip6ddi.o
+
+HOOK_OBJS +=	hook.o
+
+NETI_OBJS +=	neti_impl.o neti_mod.o neti_stack.o
+
+KEYSOCK_OBJS +=	keysockddi.o keysock.o keysock_opt_data.o
+
+IPNET_OBJS +=	ipnet.o ipnet_bpf.o
+
+SPDSOCK_OBJS += spdsockddi.o spdsock.o spdsock_opt_data.o
+
+IPSECESP_OBJS += ipsecespddi.o ipsecesp.o
+
+IPSECAH_OBJS +=	ipsecahddi.o ipsecah.o sadb.o
+
+SPPP_OBJS +=	sppp.o sppp_dlpi.o sppp_mod.o s_common.o
+
+SPPPTUN_OBJS +=	sppptun.o sppptun_mod.o
+
+SPPPASYN_OBJS += spppasyn.o spppasyn_mod.o
+
+SPPPCOMP_OBJS += spppcomp.o spppcomp_mod.o deflate.o bsd-comp.o vjcompress.o \
+		zlib.o
+
+TCP_OBJS +=	tcpddi.o
+
+TCP6_OBJS +=	tcp6ddi.o
+
+NCA_OBJS +=	ncaddi.o
+
+SDP_SOCK_MOD_OBJS += sockmod_sdp.o socksdp.o socksdpsubr.o
+
+SCTP_SOCK_MOD_OBJS += sockmod_sctp.o socksctp.o socksctpsubr.o
+
+PFP_SOCK_MOD_OBJS += sockmod_pfp.o
+
+RDS_SOCK_MOD_OBJS += sockmod_rds.o
+
+RDS_OBJS +=	rdsddi.o rdssubr.o rds_opt.o rds_ioctl.o
+
+RDSIB_OBJS +=	rdsib.o rdsib_ib.o rdsib_cm.o rdsib_ep.o rdsib_buf.o \
+		rdsib_debug.o rdsib_sc.o
+
+RDSV3_OBJS +=	af_rds.o rdsv3_ddi.o bind.o loop.o threads.o connection.o \
+		transport.o cong.o sysctl.o message.o rds_recv.o send.o \
+		stats.o info.o page.o rdma_transport.o ib_ring.o ib_rdma.o \
+		ib_recv.o ib.o ib_send.o ib_sysctl.o ib_stats.o ib_cm.o \
+		rdsv3_sc.o rdsv3_debug.o rdsv3_impl.o rdma.o rdsv3_af_thr.o
+
+ISER_OBJS +=	iser.o iser_cm.o iser_cq.o iser_ib.o iser_idm.o \
+		iser_resource.o iser_xfer.o
+
+UDP_OBJS +=	udpddi.o
+
+UDP6_OBJS +=	udp6ddi.o
+
+SY_OBJS +=	gentty.o
+
+TCO_OBJS +=	ticots.o
+
+TCOO_OBJS +=	ticotsord.o
+
+TCL_OBJS +=	ticlts.o
+
+TL_OBJS +=	tl.o
+
+DUMP_OBJS +=	dump.o
+
+BPF_OBJS +=	bpf.o bpf_filter.o bpf_mod.o bpf_dlt.o bpf_mac.o
+
+CLONE_OBJS +=	clone.o
+
+CN_OBJS +=	cons.o
+
+DLD_OBJS +=	dld_drv.o dld_proto.o dld_str.o dld_flow.o
+
+DLS_OBJS +=	dls.o dls_link.o dls_mod.o dls_stat.o dls_mgmt.o
+
+GLD_OBJS +=     gld.o gldutil.o
+
+MAC_OBJS +=     mac.o  mac_bcast.o mac_client.o mac_datapath_setup.o mac_flow.o \
+		mac_hio.o mac_mod.o mac_ndd.o mac_provider.o mac_sched.o \
+		mac_protect.o mac_soft_ring.o mac_stat.o mac_util.o
+
+MAC_6TO4_OBJS +=	mac_6to4.o
+
+MAC_ETHER_OBJS +=	mac_ether.o
+
+MAC_IPV4_OBJS +=	mac_ipv4.o
+
+MAC_IPV6_OBJS +=	mac_ipv6.o
+
+MAC_WIFI_OBJS +=	mac_wifi.o
+
+MAC_IB_OBJS +=		mac_ib.o
+
+IPTUN_OBJS +=	iptun_dev.o iptun_ctl.o iptun.o
+
+AGGR_OBJS +=	aggr_dev.o aggr_ctl.o aggr_grp.o aggr_port.o \
+		aggr_send.o aggr_recv.o aggr_lacp.o
+
+SOFTMAC_OBJS += softmac_main.o softmac_ctl.o softmac_capab.o \
+		softmac_dev.o softmac_stat.o softmac_pkt.o softmac_fp.o
+
+NET80211_OBJS += net80211.o net80211_proto.o net80211_input.o \
+		 net80211_output.o net80211_node.o net80211_crypto.o \
+		 net80211_crypto_none.o net80211_crypto_wep.o net80211_ioctl.o \
+		 net80211_crypto_tkip.o net80211_crypto_ccmp.o	\
+		 net80211_ht.o
+
+VNIC_OBJS +=	vnic_ctl.o vnic_dev.o
+
+SIMNET_OBJS +=	simnet.o
+
+IB_OBJS +=	ibnex.o ibnex_ioctl.o ibnex_hca.o
+
+IBCM_OBJS +=	ibcm_impl.o ibcm_sm.o ibcm_ti.o ibcm_utils.o ibcm_path.o \
+		ibcm_arp.o ibcm_arp_link.o
+
+IBDM_OBJS +=	ibdm.o
+
+IBDMA_OBJS +=	ibdma.o
+
+IBMF_OBJS +=	ibmf.o ibmf_impl.o ibmf_dr.o ibmf_wqe.o ibmf_ud_dest.o ibmf_mod.o \
+		ibmf_send.o ibmf_recv.o ibmf_handlers.o ibmf_trans.o \
+		ibmf_timers.o ibmf_msg.o ibmf_utils.o ibmf_rmpp.o \
+		ibmf_saa.o ibmf_saa_impl.o ibmf_saa_utils.o ibmf_saa_events.o
+
+IBTL_OBJS +=	ibtl_impl.o ibtl_util.o ibtl_mem.o ibtl_handlers.o ibtl_qp.o \
+		ibtl_cq.o ibtl_wr.o ibtl_hca.o ibtl_chan.o ibtl_cm.o \
+		ibtl_mcg.o ibtl_ibnex.o ibtl_srq.o ibtl_part.o
+
+TAVOR_OBJS +=	tavor.o tavor_agents.o tavor_cfg.o tavor_ci.o tavor_cmd.o \
+		tavor_cq.o tavor_event.o tavor_ioctl.o tavor_misc.o \
+		tavor_mr.o tavor_qp.o tavor_qpmod.o tavor_rsrc.o \
+		tavor_srq.o tavor_stats.o tavor_umap.o tavor_wr.o
+
+HERMON_OBJS +=	hermon.o hermon_agents.o hermon_cfg.o hermon_ci.o hermon_cmd.o \
+		hermon_cq.o hermon_event.o hermon_ioctl.o hermon_misc.o \
+		hermon_mr.o hermon_qp.o hermon_qpmod.o hermon_rsrc.o \
+		hermon_srq.o hermon_stats.o hermon_umap.o hermon_wr.o \
+		hermon_fcoib.o hermon_fm.o
+
+DAPLT_OBJS +=	daplt.o
+
+SOL_OFS_OBJS +=	sol_cma.o sol_ib_cma.o sol_uobj.o \
+		sol_ofs_debug_util.o sol_ofs_gen_util.o \
+		sol_kverbs.o
+
+SOL_UCMA_OBJS +=	sol_ucma.o
+
+SOL_UVERBS_OBJS +=	sol_uverbs.o sol_uverbs_comp.o sol_uverbs_event.o \
+			sol_uverbs_hca.o sol_uverbs_qp.o
+
+SOL_UMAD_OBJS += sol_umad.o
+
+KSTAT_OBJS +=	kstat.o
+
+KSYMS_OBJS +=	ksyms.o
+
+INSTANCE_OBJS += inst_sync.o
+
+IWSCN_OBJS +=	iwscons.o
+
+LOFI_OBJS +=	lofi.o LzmaDec.o
+
+FSSNAP_OBJS +=	fssnap.o
+
+FSSNAPIF_OBJS += fssnap_if.o
+
+MM_OBJS +=	mem.o
+
+PHYSMEM_OBJS +=	physmem.o
+
+OPTIONS_OBJS += options.o
+
+WINLOCK_OBJS +=	winlockio.o
+
+PM_OBJS +=	pm.o
+SRN_OBJS +=	srn.o
+
+PSEUDO_OBJS +=	pseudonex.o
+
+RAMDISK_OBJS +=	ramdisk.o
+
+LLC1_OBJS += llc1.o
+
+USBKBM_OBJS += usbkbm.o
+
+USBWCM_OBJS += usbwcm.o
+
+BOFI_OBJS += bofi.o
+
+HID_OBJS += hid.o
+
+HWA_RC_OBJS += hwarc.o
+
+USBSKEL_OBJS += usbskel.o
+
+USBVC_OBJS += usbvc.o usbvc_v4l2.o
+
+HIDPARSER_OBJS += hidparser.o
+
+USB_AC_OBJS += usb_ac.o
+
+USB_AS_OBJS += usb_as.o
+
+USB_AH_OBJS += usb_ah.o
+
+USBMS_OBJS += usbms.o
+
+USBPRN_OBJS += usbprn.o
+
+UGEN_OBJS += ugen.o
+
+USBSER_OBJS += usbser.o usbser_rseq.o
+
+USBSACM_OBJS += usbsacm.o
+
+USBSER_KEYSPAN_OBJS += usbser_keyspan.o keyspan_dsd.o keyspan_pipe.o
+
+USBS49_FW_OBJS += keyspan_49fw.o
+
+USBSPRL_OBJS += usbser_pl2303.o pl2303_dsd.o
+
+WUSB_CA_OBJS += wusb_ca.o
+
+USBFTDI_OBJS += usbser_uftdi.o uftdi_dsd.o
+
+USBECM_OBJS += usbecm.o
+
+WC_OBJS += wscons.o vcons.o
+
+VCONS_CONF_OBJS += vcons_conf.o
+
+SCSI_OBJS +=	scsi_capabilities.o scsi_confsubr.o scsi_control.o \
+		scsi_data.o scsi_fm.o scsi_hba.o scsi_reset_notify.o \
+		scsi_resource.o scsi_subr.o scsi_transport.o scsi_watch.o \
+		smp_transport.o
+
+SCSI_VHCI_OBJS +=		scsi_vhci.o mpapi_impl.o scsi_vhci_tpgs.o
+
+SCSI_VHCI_F_SYM_OBJS +=		sym.o
+
+SCSI_VHCI_F_TPGS_OBJS +=	tpgs.o
+
+SCSI_VHCI_F_ASYM_SUN_OBJS +=	asym_sun.o
+
+SCSI_VHCI_F_SYM_HDS_OBJS += 	sym_hds.o
+
+SCSI_VHCI_F_TAPE_OBJS +=	tape.o
+
+SCSI_VHCI_F_TPGS_TAPE_OBJS +=	tpgs_tape.o
+
+SGEN_OBJS +=	sgen.o
+
+SMP_OBJS +=	smp.o
+
+SATA_OBJS +=	sata.o
+
+USBA_OBJS +=	hcdi.o	usba.o	usbai.o hubdi.o parser.o genconsole.o \
+		usbai_pipe_mgmt.o usbai_req.o usbai_util.o usbai_register.o \
+		usba_devdb.o usba10_calls.o usba_ugen.o whcdi.o wa.o
+USBA_WITHOUT_WUSB_OBJS +=	hcdi.o	usba.o	usbai.o hubdi.o parser.o genconsole.o \
+		usbai_pipe_mgmt.o usbai_req.o usbai_util.o usbai_register.o \
+		usba_devdb.o usba10_calls.o usba_ugen.o
+
+USBA10_OBJS +=	usba10.o
+
+RSM_OBJS +=	rsm.o	rsmka_pathmanager.o	rsmka_util.o
+
+RSMOPS_OBJS +=	rsmops.o
+
+S1394_OBJS +=	t1394.o t1394_errmsg.o s1394.o s1394_addr.o s1394_asynch.o \
+		s1394_bus_reset.o s1394_cmp.o s1394_csr.o s1394_dev_disc.o \
+		s1394_fa.o s1394_fcp.o \
+		s1394_hotplug.o s1394_isoch.o s1394_misc.o h1394.o nx1394.o
+
+HCI1394_OBJS +=	hci1394.o hci1394_async.o hci1394_attach.o hci1394_buf.o \
+		hci1394_csr.o hci1394_detach.o hci1394_extern.o \
+		hci1394_ioctl.o hci1394_isoch.o hci1394_isr.o \
+		hci1394_ixl_comp.o hci1394_ixl_isr.o hci1394_ixl_misc.o \
+		hci1394_ixl_update.o hci1394_misc.o hci1394_ohci.o \
+		hci1394_q.o hci1394_s1394if.o hci1394_tlabel.o \
+		hci1394_tlist.o hci1394_vendor.o
+
+AV1394_OBJS +=	av1394.o av1394_as.o av1394_async.o av1394_cfgrom.o \
+		av1394_cmp.o av1394_fcp.o av1394_isoch.o av1394_isoch_chan.o \
+		av1394_isoch_recv.o av1394_isoch_xmit.o av1394_list.o \
+		av1394_queue.o
+
+DCAM1394_OBJS += dcam.o dcam_frame.o dcam_param.o dcam_reg.o \
+		dcam_ring_buff.o
+
+SCSA1394_OBJS += hba.o sbp2_driver.o sbp2_bus.o
+
+SBP2_OBJS += cfgrom.o sbp2.o
+
+PMODEM_OBJS += pmodem.o pmodem_cis.o cis.o cis_callout.o cis_handlers.o cis_params.o
+
+DSW_OBJS +=	dsw.o dsw_dev.o ii_tree.o
+
+NCALL_OBJS +=	ncall.o \
+		ncall_stub.o
+
+RDC_OBJS +=	rdc.o \
+		rdc_dev.o \
+		rdc_io.o \
+		rdc_clnt.o \
+		rdc_prot_xdr.o \
+		rdc_svc.o \
+		rdc_bitmap.o \
+		rdc_health.o \
+		rdc_subr.o \
+		rdc_diskq.o
+
+RDCSRV_OBJS +=	rdcsrv.o
+
+RDCSTUB_OBJS += rdc_stub.o
+
+SDBC_OBJS +=	sd_bcache.o \
+		sd_bio.o \
+		sd_conf.o \
+		sd_ft.o \
+		sd_hash.o \
+		sd_io.o \
+		sd_misc.o \
+		sd_pcu.o \
+		sd_tdaemon.o \
+		sd_trace.o \
+		sd_iob_impl0.o \
+		sd_iob_impl1.o \
+		sd_iob_impl2.o \
+		sd_iob_impl3.o \
+		sd_iob_impl4.o \
+		sd_iob_impl5.o \
+		sd_iob_impl6.o \
+		sd_iob_impl7.o \
+		safestore.o \
+		safestore_ram.o
+
+NSCTL_OBJS +=	nsctl.o \
+		nsc_cache.o \
+		nsc_disk.o \
+		nsc_dev.o \
+		nsc_freeze.o \
+		nsc_gen.o \
+		nsc_mem.o \
+		nsc_ncallio.o \
+		nsc_power.o \
+		nsc_resv.o \
+		nsc_rmspin.o \
+		nsc_solaris.o \
+		nsc_trap.o \
+		nsc_list.o
+UNISTAT_OBJS +=	spuni.o \
+		spcs_s_k.o
+
+NSKERN_OBJS +=	nsc_ddi.o \
+		nsc_proc.o \
+		nsc_raw.o \
+		nsc_thread.o \
+		nskernd.o
+
+SV_OBJS +=	sv.o
+
+PMCS_OBJS += pmcs_attach.o pmcs_ds.o pmcs_intr.o pmcs_nvram.o pmcs_sata.o \
+		pmcs_scsa.o pmcs_smhba.o pmcs_subr.o pmcs_fwlog.o
+
+PMCS8001FW_C_OBJS +=	pmcs_fw_hdr.o
+PMCS8001FW_OBJS +=		$(PMCS8001FW_C_OBJS) SPCBoot.o ila.o firmware.o
+
+#
+#	Build up defines and paths.
+
+ST_OBJS +=	st.o	st_conf.o
+
+EMLXS_OBJS +=	emlxs_clock.o emlxs_dfc.o emlxs_dhchap.o emlxs_diag.o \
+		emlxs_download.o emlxs_dump.o emlxs_els.o emlxs_event.o \
+		emlxs_fcp.o emlxs_fct.o emlxs_hba.o emlxs_ip.o \
+		emlxs_mbox.o emlxs_mem.o emlxs_msg.o emlxs_node.o \
+		emlxs_pkt.o emlxs_sli3.o emlxs_sli4.o emlxs_solaris.o \
+		emlxs_thread.o
+
+EMLXS_FW_OBJS +=	emlxs_fw.o
+
+OCE_OBJS +=	oce_buf.o oce_fm.o oce_gld.o oce_hw.o oce_intr.o oce_main.o \
+		oce_mbx.o oce_mq.o oce_queue.o oce_rx.o oce_stat.o oce_tx.o \
+		oce_utils.o
+
+FCT_OBJS += discovery.o fct.o
+
+QLT_OBJS += 2400.o 2500.o 8100.o qlt.o qlt_dma.o
+
+SRPT_OBJS += srpt_mod.o srpt_ch.o srpt_cm.o srpt_ioc.o srpt_stp.o
+
+FCOE_OBJS += fcoe.o fcoe_eth.o fcoe_fc.o
+
+FCOET_OBJS += fcoet.o fcoet_eth.o fcoet_fc.o
+
+FCOEI_OBJS += fcoei.o fcoei_eth.o fcoei_lv.o
+
+ISCSIT_SHARED_OBJS += \
+		iscsit_common.o
+
+ISCSIT_OBJS +=	$(ISCSIT_SHARED_OBJS) \
+		iscsit.o iscsit_tgt.o iscsit_sess.o iscsit_login.o \
+		iscsit_text.o iscsit_isns.o iscsit_radiusauth.o \
+		iscsit_radiuspacket.o iscsit_auth.o iscsit_authclient.o
+
+PPPT_OBJS +=	alua_ic_if.o pppt.o pppt_msg.o pppt_tgt.o
+
+STMF_OBJS += lun_map.o stmf.o
+
+STMF_SBD_OBJS += sbd.o sbd_scsi.o sbd_pgr.o sbd_zvol.o
+
+SYSMSG_OBJS +=	sysmsg.o
+
+SES_OBJS +=	ses.o ses_sen.o ses_safte.o ses_ses.o
+
+TNF_OBJS +=	tnf_buf.o	tnf_trace.o	tnf_writer.o	trace_init.o \
+		trace_funcs.o	tnf_probe.o	tnf.o
+
+LOGINDMUX_OBJS += logindmux.o
+
+DEVINFO_OBJS += devinfo.o
+
+DEVPOLL_OBJS += devpoll.o
+
+DEVPOOL_OBJS += devpool.o
+
+I8042_OBJS +=	i8042.o
+
+KB8042_OBJS +=	\
+		at_keyprocess.o	\
+		kb8042.o	\
+		kb8042_keytables.o
+
+MOUSE8042_OBJS += mouse8042.o
+
+FDC_OBJS +=	fdc.o
+
+ASY_OBJS +=	asy.o
+
+ECPP_OBJS +=	ecpp.o
+
+VUIDM3P_OBJS += vuidmice.o vuidm3p.o
+
+VUIDM4P_OBJS += vuidmice.o vuidm4p.o
+
+VUIDM5P_OBJS += vuidmice.o vuidm5p.o
+
+VUIDPS2_OBJS += vuidmice.o vuidps2.o
+
+HPCSVC_OBJS += hpcsvc.o
+
+PCIE_MISC_OBJS += pcie.o pcie_fault.o pcie_hp.o pciehpc.o pcishpc.o pcie_pwr.o pciev.o
+
+PCIHPNEXUS_OBJS += pcihp.o
+
+OPENEEPR_OBJS += openprom.o
+
+RANDOM_OBJS += random.o
+
+PSHOT_OBJS += pshot.o
+
+GEN_DRV_OBJS += gen_drv.o
+
+TCLIENT_OBJS +=	tclient.o
+
+TPHCI_OBJS += tphci.o
+
+TVHCI_OBJS += tvhci.o
+
+EMUL64_OBJS += emul64.o emul64_bsd.o
+
+FCP_OBJS += fcp.o
+
+FCIP_OBJS += fcip.o
+
+FCSM_OBJS += fcsm.o
+
+FCTL_OBJS += fctl.o
+
+FP_OBJS += fp.o
+
+QLC_OBJS += ql_api.o ql_debug.o ql_hba_fru.o ql_init.o ql_iocb.o ql_ioctl.o \
+	ql_isr.o ql_mbx.o ql_nx.o ql_xioctl.o ql_fw_table.o
+
+QLC_FW_2200_OBJS += ql_fw_2200.o
+
+QLC_FW_2300_OBJS += ql_fw_2300.o
+
+QLC_FW_2400_OBJS += ql_fw_2400.o
+
+QLC_FW_2500_OBJS += ql_fw_2500.o
+
+QLC_FW_6322_OBJS += ql_fw_6322.o
+
+QLC_FW_8100_OBJS += ql_fw_8100.o
+
+QLGE_OBJS += qlge.o qlge_dbg.o qlge_flash.o qlge_fm.o qlge_gld.o qlge_mpi.o
+
+ZCONS_OBJS += zcons.o
+
+NV_SATA_OBJS += nv_sata.o
+
+SI3124_OBJS += si3124.o
+
+AHCI_OBJS += ahci.o
+
+PCIIDE_OBJS += pci-ide.o
+
+PCEPP_OBJS += pcepp.o
+
+CPC_OBJS += cpc.o
+
+CPUID_OBJS += cpuid_drv.o
+
+SYSEVENT_OBJS += sysevent.o
+
+BL_OBJS += bl.o
+
+DRM_OBJS += drm_sunmod.o drm_kstat.o drm_agpsupport.o \
+	    drm_auth.o drm_bufs.o drm_context.o drm_dma.o \
+	    drm_drawable.o drm_drv.o drm_fops.o drm_ioctl.o drm_irq.o \
+	    drm_lock.o drm_memory.o drm_msg.o drm_pci.o drm_scatter.o \
+	    drm_cache.o drm_gem.o drm_mm.o ati_pcigart.o 
+
+FM_OBJS += devfm.o devfm_machdep.o
+
+RTLS_OBJS +=	rtls.o
+
+#
+#			exec modules
+#
+AOUTEXEC_OBJS +=aout.o
+
+ELFEXEC_OBJS +=	elf.o elf_notes.o old_notes.o
+
+INTPEXEC_OBJS +=intp.o
+
+SHBINEXEC_OBJS +=shbin.o
+
+JAVAEXEC_OBJS +=java.o
+
+#
+#			file system modules
+#
+AUTOFS_OBJS +=	auto_vfsops.o auto_vnops.o auto_subr.o auto_xdr.o auto_sys.o
+
+CACHEFS_OBJS +=	cachefs_cnode.o		cachefs_cod.o \
+		cachefs_dir.o		cachefs_dlog.o	cachefs_filegrp.o \
+		cachefs_fscache.o	cachefs_ioctl.o	cachefs_log.o \
+		cachefs_module.o \
+		cachefs_noopc.o		cachefs_resource.o \
+		cachefs_strict.o \
+		cachefs_subr.o		cachefs_vfsops.o \
+		cachefs_vnops.o
+
+DCFS_OBJS +=	dc_vnops.o
+
+DEVFS_OBJS +=	devfs_subr.o	devfs_vfsops.o	devfs_vnops.o
+
+DEV_OBJS  +=	sdev_subr.o	sdev_vfsops.o	sdev_vnops.o	\
+		sdev_ptsops.o	sdev_zvolops.o	sdev_comm.o	\
+		sdev_profile.o	sdev_ncache.o	sdev_netops.o	\
+		sdev_ipnetops.o	\
+		sdev_vtops.o
+
+CTFS_OBJS +=	ctfs_all.o ctfs_cdir.o ctfs_ctl.o ctfs_event.o \
+		ctfs_latest.o ctfs_root.o ctfs_sym.o ctfs_tdir.o ctfs_tmpl.o
+
+OBJFS_OBJS +=	objfs_vfs.o	objfs_root.o	objfs_common.o \
+		objfs_odir.o	objfs_data.o
+
+FDFS_OBJS +=	fdops.o
+
+FIFO_OBJS +=	fifosubr.o	fifovnops.o
+
+PIPE_OBJS +=	pipe.o
+
+HSFS_OBJS +=	hsfs_node.o	hsfs_subr.o	hsfs_vfsops.o	hsfs_vnops.o \
+		hsfs_susp.o	hsfs_rrip.o	hsfs_susp_subr.o
+
+LOFS_OBJS +=	lofs_subr.o	lofs_vfsops.o	lofs_vnops.o
+
+NAMEFS_OBJS +=	namevfs.o	namevno.o
+
+NFS_OBJS +=	nfs_client.o	nfs_common.o	nfs_dump.o \
+		nfs_subr.o	nfs_vfsops.o	nfs_vnops.o \
+		nfs_xdr.o	nfs_sys.o	nfs_strerror.o \
+		nfs3_vfsops.o	nfs3_vnops.o	nfs3_xdr.o \
+		nfs_acl_vnops.o	nfs_acl_xdr.o	nfs4_vfsops.o \
+		nfs4_vnops.o	nfs4_xdr.o 	nfs4_idmap.o \
+		nfs4_shadow.o	nfs4_subr.o \
+		nfs4_attr.o	nfs4_rnode.o	nfs4_client.o \
+		nfs4_acache.o	nfs4_common.o	nfs4_client_state.o \
+		nfs4_callback.o	nfs4_recovery.o nfs4_client_secinfo.o \
+		nfs4_client_debug.o	nfs_stats.o \
+		nfs4_acl.o	nfs4_stub_vnops.o	nfs_cmd.o
+
+NFSSRV_OBJS +=	nfs_server.o	nfs_srv.o	nfs3_srv.o \
+		nfs_acl_srv.o	nfs_auth.o	nfs_auth_xdr.o \
+		nfs_export.o	nfs_log.o	nfs_log_xdr.o \
+		nfs4_srv.o	nfs4_state.o	nfs4_srv_attr.o \
+		nfs4_srv_ns.o	nfs4_db.o	nfs4_srv_deleg.o \
+		nfs4_deleg_ops.o nfs4_srv_readdir.o nfs4_dispatch.o
+
+SMBSRV_SHARED_OBJS += \
+		smb_inet.o \
+		smb_match.o \
+		smb_msgbuf.o \
+		smb_oem.o \
+		smb_string.o \
+		smb_utf8.o \
+		smb_door_legacy.o \
+		smb_xdr.o \
+		smb_token.o \
+		smb_token_xdr.o \
+		smb_sid.o \
+		smb_native.o \
+		smb_netbios_util.o
+
+SMBSRV_OBJS +=	$(SMBSRV_SHARED_OBJS)			\
+		smb_acl.o				\
+		smb_alloc.o				\
+		smb_close.o				\
+		smb_common_open.o			\
+		smb_common_transact.o			\
+		smb_create.o				\
+		smb_delete.o				\
+		smb_directory.o				\
+		smb_dispatch.o				\
+		smb_echo.o				\
+		smb_fem.o				\
+		smb_find.o				\
+		smb_flush.o				\
+		smb_fsinfo.o				\
+		smb_fsops.o				\
+		smb_init.o				\
+		smb_kdoor.o				\
+		smb_kshare.o				\
+                smb_kutil.o				\
+		smb_lock.o				\
+		smb_lock_byte_range.o			\
+		smb_locking_andx.o			\
+		smb_logoff_andx.o			\
+		smb_mangle_name.o			\
+		smb_mbuf_marshaling.o			\
+		smb_mbuf_util.o				\
+		smb_negotiate.o				\
+		smb_net.o				\
+		smb_node.o				\
+                smb_nt_cancel.o				\
+		smb_nt_create_andx.o			\
+                smb_nt_transact_create.o		\
+		smb_nt_transact_ioctl.o			\
+		smb_nt_transact_notify_change.o		\
+		smb_nt_transact_quota.o			\
+		smb_nt_transact_security.o		\
+                smb_odir.o				\
+		smb_ofile.o				\
+		smb_open_andx.o				\
+		smb_opipe.o				\
+		smb_oplock.o				\
+		smb_pathname.o				\
+		smb_print.o				\
+		smb_process_exit.o			\
+		smb_query_fileinfo.o			\
+		smb_read.o				\
+		smb_rename.o				\
+		smb_sd.o				\
+		smb_seek.o				\
+		smb_server.o				\
+		smb_session.o				\
+		smb_session_setup_andx.o		\
+		smb_set_fileinfo.o			\
+		smb_signing.o				\
+                smb_tree.o				\
+		smb_trans2_create_directory.o		\
+		smb_trans2_dfs.o			\
+		smb_trans2_find.o			\
+		smb_tree_connect.o			\
+		smb_unlock_byte_range.o			\
+		smb_user.o				\
+		smb_vfs.o				\
+		smb_vops.o				\
+		smb_vss.o				\
+		smb_write.o				\
+		smb_write_raw.o
+
+PCFS_OBJS +=	pc_alloc.o	pc_dir.o	pc_node.o	pc_subr.o \
+		pc_vfsops.o	pc_vnops.o
+
+PROC_OBJS +=	prcontrol.o	prioctl.o	prsubr.o	prusrio.o \
+		prvfsops.o	prvnops.o
+
+MNTFS_OBJS +=	mntvfsops.o	mntvnops.o
+
+SHAREFS_OBJS +=	sharetab.o	sharefs_vfsops.o	sharefs_vnops.o
+
+SPEC_OBJS +=	specsubr.o	specvfsops.o	specvnops.o
+
+SOCK_OBJS +=	socksubr.o	sockvfsops.o	sockparams.o	\
+		socksyscalls.o	socktpi.o	sockstr.o \
+		sockcommon_vnops.o	sockcommon_subr.o \
+		sockcommon_sops.o	sockcommon.o	\
+		sock_notsupp.o	socknotify.o \
+		nl7c.o		nl7curi.o	nl7chttp.o	nl7clogd.o \
+		nl7cnca.o	sodirect.o	sockfilter.o
+
+TMPFS_OBJS +=	tmp_dir.o	tmp_subr.o	tmp_tnode.o	tmp_vfsops.o \
+		tmp_vnops.o
+
+UDFS_OBJS +=	udf_alloc.o	udf_bmap.o	udf_dir.o	\
+		udf_inode.o	udf_subr.o	udf_vfsops.o	\
+		udf_vnops.o
+
+UFS_OBJS +=	ufs_alloc.o	ufs_bmap.o	ufs_dir.o 	ufs_xattr.o \
+		ufs_inode.o	ufs_subr.o	ufs_tables.o	ufs_vfsops.o \
+		ufs_vnops.o	quota.o		quotacalls.o	quota_ufs.o \
+		ufs_filio.o	ufs_lockfs.o	ufs_thread.o	ufs_trans.o \
+		ufs_acl.o	ufs_panic.o	ufs_directio.o	ufs_log.o \
+		ufs_extvnops.o	ufs_snap.o	lufs.o		lufs_thread.o \
+		lufs_log.o	lufs_map.o	lufs_top.o	lufs_debug.o
+VSCAN_OBJS +=	vscan_drv.o	vscan_svc.o vscan_door.o
+
+NSMB_OBJS +=	smb_conn.o	smb_dev.o	smb_iod.o	smb_pass.o \
+		smb_rq.o	smb_sign.o	smb_smb.o	smb_subrs.o \
+		smb_time.o	smb_tran.o	smb_trantcp.o	smb_usr.o \
+		subr_mchain.o
+
+SMBFS_COMMON_OBJS += smbfs_ntacl.o
+SMBFS_OBJS +=	smbfs_vfsops.o	smbfs_vnops.o	smbfs_node.o	\
+		smbfs_acl.o	smbfs_client.o	smbfs_smb.o	\
+		smbfs_subr.o	smbfs_subr2.o	\
+		smbfs_rwlock.o	smbfs_xattr.o	\
+		$(SMBFS_COMMON_OBJS)
+
+
+#
+#			LVM modules
+#
+MD_OBJS	+= md.o md_error.o md_ioctl.o md_mddb.o md_names.o \
+	md_med.o md_rename.o md_subr.o
+
+MD_COMMON_OBJS = md_convert.o md_crc.o md_revchk.o
+
+MD_DERIVED_OBJS = metamed_xdr.o meta_basic_xdr.o
+
+SOFTPART_OBJS += sp.o sp_ioctl.o
+
+STRIPE_OBJS += stripe.o stripe_ioctl.o
+
+HOTSPARES_OBJS += hotspares.o
+
+RAID_OBJS += raid.o raid_ioctl.o raid_replay.o raid_resync.o raid_hotspare.o
+
+MIRROR_OBJS += mirror.o mirror_ioctl.o mirror_resync.o
+
+NOTIFY_OBJS += md_notify.o
+
+TRANS_OBJS += mdtrans.o trans_ioctl.o trans_log.o
+
+ZFS_COMMON_OBJS +=		\
+	arc.o			\
+	bplist.o		\
+	bpobj.o			\
+	dbuf.o			\
+	ddt.o			\
+	ddt_zap.o		\
+	dmu.o			\
+	dmu_diff.o		\
+	dmu_send.o		\
+	dmu_object.o		\
+	dmu_objset.o		\
+	dmu_traverse.o		\
+	dmu_tx.o		\
+	dnode.o			\
+	dnode_sync.o		\
+	dsl_dir.o		\
+	dsl_dataset.o		\
+	dsl_deadlist.o		\
+	dsl_pool.o		\
+	dsl_synctask.o		\
+	dmu_zfetch.o		\
+	dsl_deleg.o		\
+	dsl_prop.o		\
+	dsl_scan.o		\
+	gzip.o			\
+	lzjb.o			\
+	metaslab.o		\
+	refcount.o		\
+	sa.o			\
+	sha256.o		\
+	spa.o			\
+	spa_config.o		\
+	spa_errlog.o		\
+	spa_history.o		\
+	spa_misc.o		\
+	space_map.o		\
+	txg.o			\
+	uberblock.o		\
+	unique.o		\
+	vdev.o			\
+	vdev_cache.o		\
+	vdev_file.o		\
+	vdev_label.o		\
+	vdev_mirror.o		\
+	vdev_missing.o		\
+	vdev_queue.o		\
+	vdev_raidz.o		\
+	vdev_root.o		\
+	zap.o			\
+	zap_leaf.o		\
+	zap_micro.o		\
+	zfs_byteswap.o		\
+	zfs_debug.o		\
+	zfs_fm.o		\
+	zfs_fuid.o		\
+	zfs_sa.o		\
+	zfs_znode.o		\
+	zil.o			\
+	zio.o			\
+	zio_checksum.o		\
+	zio_compress.o		\
+	zio_inject.o		\
+	zle.o			\
+	zrlock.o
+
+ZFS_SHARED_OBJS +=		\
+	zfs_namecheck.o		\
+	zfs_deleg.o		\
+	zfs_prop.o		\
+	zfs_comutil.o		\
+	zfs_fletcher.o		\
+	zpool_prop.o		\
+	zprop_common.o
+
+ZFS_OBJS +=			\
+	$(ZFS_COMMON_OBJS)	\
+	$(ZFS_SHARED_OBJS)	\
+	vdev_disk.o		\
+	zfs_acl.o		\
+	zfs_ctldir.o		\
+	zfs_dir.o		\
+	zfs_ioctl.o		\
+	zfs_log.o		\
+	zfs_onexit.o		\
+	zfs_replay.o		\
+	zfs_rlock.o		\
+	rrwlock.o		\
+	zfs_vfsops.o		\
+	zfs_vnops.o		\
+	zvol.o
+
+ZUT_OBJS +=			\
+	zut.o
+
+#
+#			streams modules
+#
+BUFMOD_OBJS	+=	bufmod.o
+
+CONNLD_OBJS +=	connld.o
+
+DEDUMP_OBJS +=	dedump.o
+
+DRCOMPAT_OBJS +=	drcompat.o
+
+LDLINUX_OBJS +=	ldlinux.o
+
+LDTERM_OBJS +=	ldterm.o uwidth.o
+
+PCKT_OBJS +=	pckt.o
+
+PFMOD_OBJS +=	pfmod.o
+
+PTEM_OBJS +=	ptem.o
+
+REDIRMOD_OBJS += strredirm.o
+
+TIMOD_OBJS +=	timod.o
+
+TIRDWR_OBJS +=	tirdwr.o
+
+TTCOMPAT_OBJS +=ttcompat.o
+
+LOG_OBJS +=	log.o
+
+PIPEMOD_OBJS +=	pipemod.o
+
+RPCMOD_OBJS +=	rpcmod.o	clnt_cots.o	clnt_clts.o \
+		clnt_gen.o	clnt_perr.o	mt_rpcinit.o	rpc_calmsg.o \
+		rpc_prot.o	rpc_sztypes.o	rpc_subr.o	rpcb_prot.o \
+		svc.o		svc_clts.o	svc_gen.o	svc_cots.o \
+		rpcsys.o	xdr_sizeof.o	clnt_rdma.o	svc_rdma.o \
+		xdr_rdma.o	rdma_subr.o	xdrrdma_sizeof.o
+
+TLIMOD_OBJS +=	tlimod.o	t_kalloc.o	t_kbind.o	t_kclose.o \
+		t_kconnect.o	t_kfree.o	t_kgtstate.o	t_kopen.o \
+		t_krcvudat.o	t_ksndudat.o	t_kspoll.o	t_kunbind.o \
+		t_kutil.o
+
+RLMOD_OBJS += rlmod.o
+
+TELMOD_OBJS += telmod.o
+
+CRYPTMOD_OBJS += cryptmod.o
+
+KB_OBJS +=	kbd.o		keytables.o
+
+#
+#			ID mapping module
+#
+IDMAP_OBJS +=	idmap_mod.o	idmap_kapi.o	idmap_xdr.o	idmap_cache.o
+
+#
+#			scheduling class modules
+#
+SDC_OBJS +=		sysdc.o
+
+RT_OBJS +=		rt.o
+RT_DPTBL_OBJS +=	rt_dptbl.o
+
+TS_OBJS +=		ts.o
+TS_DPTBL_OBJS +=	ts_dptbl.o
+
+IA_OBJS +=		ia.o
+
+FSS_OBJS +=		fss.o
+
+FX_OBJS +=		fx.o
+FX_DPTBL_OBJS +=	fx_dptbl.o
+
+#
+#			Inter-Process Communication (IPC) modules
+#
+IPC_OBJS +=	ipc.o
+
+IPCMSG_OBJS +=	msg.o
+
+IPCSEM_OBJS +=	sem.o
+
+IPCSHM_OBJS +=	shm.o
+
+#
+#			bignum module
+#
+COMMON_BIGNUM_OBJS += bignum_mod.o bignumimpl.o
+
+BIGNUM_OBJS += $(COMMON_BIGNUM_OBJS) $(BIGNUM_PSR_OBJS)
+
+#
+#			kernel cryptographic framework
+#
+KCF_OBJS +=	kcf.o kcf_callprov.o kcf_cbufcall.o kcf_cipher.o kcf_crypto.o \
+		kcf_cryptoadm.o kcf_ctxops.o kcf_digest.o kcf_dual.o \
+		kcf_keys.o kcf_mac.o kcf_mech_tabs.o kcf_miscapi.o \
+		kcf_object.o kcf_policy.o kcf_prov_lib.o kcf_prov_tabs.o \
+		kcf_sched.o kcf_session.o kcf_sign.o kcf_spi.o kcf_verify.o \
+		kcf_random.o modes.o ecb.o cbc.o ctr.o ccm.o gcm.o \
+		fips_random.o fips_checksum.o fips_test_vectors.o
+
+CRYPTOADM_OBJS += cryptoadm.o
+
+CRYPTO_OBJS +=	crypto.o
+
+DPROV_OBJS +=	dprov.o
+
+DCA_OBJS +=	dca.o dca_3des.o dca_debug.o dca_dsa.o dca_kstat.o dca_rng.o \
+		dca_rsa.o
+
+AESPROV_OBJS +=	aes.o aes_impl.o aes_modes.o fips_aes_util.o
+
+ARCFOURPROV_OBJS += arcfour.o arcfour_crypt.o
+
+BLOWFISHPROV_OBJS += blowfish.o blowfish_impl.o
+
+ECCPROV_OBJS += ecc.o ec.o ec2_163.o ec2_mont.o ecdecode.o ecl_mult.o \
+		ecp_384.o ecp_jac.o ec2_193.o ecl.o ecp_192.o ecp_521.o \
+		ecp_jm.o ec2_233.o ecl_curve.o ecp_224.o ecp_aff.o \
+		ecp_mont.o ec2_aff.o ec_naf.o ecl_gf.o ecp_256.o mp_gf2m.o \
+		mpi.o mplogic.o mpmontg.o mpprime.o oid.o \
+		secitem.o ec2_test.o ecp_test.o fips_ecc_util.o
+
+RSAPROV_OBJS += rsa.o rsa_impl.o pkcs1.o fips_rsa_util.o
+
+SWRANDPROV_OBJS += swrand.o fips_random_util.o
+
+#
+#			kernel SSL
+#
+KSSL_OBJS +=	kssl.o ksslioctl.o 
+
+KSSL_SOCKFIL_MOD_OBJS += ksslfilter.o ksslapi.o ksslrec.o
+
+#
+#			misc. modules
+#
+
+C2AUDIT_OBJS +=	adr.o audit.o audit_event.o audit_io.o \
+		audit_path.o audit_start.o audit_syscalls.o audit_token.o \
+		audit_mem.o
+
+PCIC_OBJS +=	pcic.o
+
+RPCSEC_OBJS +=	secmod.o	sec_clnt.o	sec_svc.o	sec_gen.o \
+		auth_des.o	auth_kern.o	auth_none.o	auth_loopb.o\
+		authdesprt.o	authdesubr.o	authu_prot.o \
+		key_call.o	key_prot.o	svc_authu.o	svcauthdes.o
+
+RPCSEC_GSS_OBJS +=	rpcsec_gssmod.o rpcsec_gss.o rpcsec_gss_misc.o \
+		rpcsec_gss_utils.o svc_rpcsec_gss.o
+
+CONSCONFIG_OBJS += consconfig.o
+
+CONSCONFIG_DACF_OBJS  += consconfig_dacf.o consplat.o
+
+TEM_OBJS += tem.o tem_safe.o 6x10.o 7x14.o 12x22.o
+
+KBTRANS_OBJS +=				\
+		kbtrans.o		\
+		kbtrans_keytables.o	\
+		kbtrans_polled.o	\
+		kbtrans_streams.o	\
+		usb_keytables.o
+
+KGSSD_OBJS +=	gssd_clnt_stubs.o gssd_handle.o gssd_prot.o \
+		gss_display_name.o gss_release_name.o gss_import_name.o \
+		gss_release_buffer.o gss_release_oid_set.o gen_oids.o gssdmod.o
+
+KGSSD_DERIVED_OBJS = gssd_xdr.o
+
+KGSS_DUMMY_OBJS += dmech.o
+
+KSOCKET_OBJS +=	ksocket.o ksocket_mod.o
+
+CRYPTO= cksumtypes.o decrypt.o encrypt.o encrypt_length.o etypes.o \
+	nfold.o verify_checksum.o prng.o block_size.o make_checksum.o\
+	checksum_length.o hmac.o default_state.o mandatory_sumtype.o
+
+# crypto/des
+CRYPTO_DES= f_cbc.o f_cksum.o f_parity.o weak_key.o d3_cbc.o ef_crypto.o
+
+CRYPTO_DK= checksum.o derive.o dk_decrypt.o dk_encrypt.o
+
+CRYPTO_ARCFOUR= k5_arcfour.o
+
+# crypto/enc_provider
+CRYPTO_ENC= des.o des3.o arcfour_provider.o aes_provider.o
+
+# crypto/hash_provider
+CRYPTO_HASH= hash_kef_generic.o hash_kmd5.o hash_crc32.o hash_ksha1.o
+
+# crypto/keyhash_provider
+CRYPTO_KEYHASH= descbc.o k5_kmd5des.o k_hmac_md5.o
+
+# crypto/crc32
+CRYPTO_CRC32= crc32.o
+
+# crypto/old
+CRYPTO_OLD= old_decrypt.o old_encrypt.o
+
+# crypto/raw
+CRYPTO_RAW= raw_decrypt.o raw_encrypt.o
+
+K5_KRB= kfree.o copy_key.o \
+	parse.o init_ctx.o \
+	ser_adata.o ser_addr.o \
+	ser_auth.o ser_cksum.o \
+	ser_key.o ser_princ.o \
+	serialize.o unparse.o \
+	ser_actx.o
+
+K5_OS=  timeofday.o toffset.o \
+	init_os_ctx.o c_ustime.o
+
+SEAL=
+# EXPORT DELETE START
+SEAL=	seal.o unseal.o
+# EXPORT DELETE END
+
+MECH=	delete_sec_context.o \
+	import_sec_context.o \
+	gssapi_krb5.o \
+	k5seal.o k5unseal.o k5sealv3.o \
+	ser_sctx.o \
+	sign.o \
+	util_crypt.o  \
+	util_validate.o  util_ordering.o  \
+	util_seqnum.o util_set.o util_seed.o \
+	wrap_size_limit.o verify.o
+
+
+
+MECH_GEN= util_token.o
+
+
+KGSS_KRB5_OBJS += krb5mech.o \
+	$(MECH) $(SEAL) $(MECH_GEN) \
+	$(CRYPTO) $(CRYPTO_DES) $(CRYPTO_DK) $(CRYPTO_ARCFOUR) \
+	$(CRYPTO_ENC) $(CRYPTO_HASH) \
+	$(CRYPTO_KEYHASH) $(CRYPTO_CRC32) \
+	$(CRYPTO_OLD) \
+	$(CRYPTO_RAW) $(K5_KRB) $(K5_OS)
+
+DES_OBJS +=	des_crypt.o des_impl.o des_ks.o des_soft.o fips_des_util.o
+
+DLBOOT_OBJS +=	bootparam_xdr.o nfs_dlinet.o scan.o
+
+KRTLD_OBJS +=	kobj_bootflags.o getoptstr.o \
+		kobj.o kobj_kdi.o kobj_lm.o kobj_subr.o
+
+MOD_OBJS +=	modctl.o modsubr.o modsysfile.o modconf.o modhash.o
+
+STRPLUMB_OBJS += strplumb.o
+
+CPR_OBJS +=	cpr_driver.o cpr_dump.o \
+		cpr_main.o cpr_misc.o cpr_mod.o cpr_stat.o \
+		cpr_uthread.o
+
+PROF_OBJS +=	prf.o
+
+SE_OBJS += se_driver.o
+
+SYSACCT_OBJS +=	acct.o
+
+ACCTCTL_OBJS +=	acctctl.o
+
+EXACCTSYS_OBJS += exacctsys.o
+
+KAIO_OBJS += aio.o
+
+PCMCIA_OBJS += pcmcia.o cs.o cis.o cis_callout.o cis_handlers.o cis_params.o
+
+BUSRA_OBJS += busra.o
+
+PCS_OBJS += pcs.o
+
+PCAN_OBJS += pcan.o
+
+PCATA_OBJS += pcide.o pcdisk.o pclabel.o pcata.o
+
+PCSER_OBJS += pcser.o pcser_cis.o
+
+PCWL_OBJS += pcwl.o
+
+PSET_OBJS +=	pset.o
+
+OHCI_OBJS += ohci.o ohci_hub.o ohci_polled.o
+
+UHCI_OBJS += uhci.o uhciutil.o uhcitgt.o uhcihub.o uhcipolled.o
+
+EHCI_OBJS += ehci.o ehci_hub.o ehci_xfer.o ehci_intr.o ehci_util.o ehci_polled.o ehci_isoch.o ehci_isoch_util.o
+
+HUBD_OBJS += hubd.o
+
+USB_MID_OBJS += usb_mid.o
+
+USB_IA_OBJS += usb_ia.o
+
+UWBA_OBJS += uwba.o uwbai.o
+
+SCSA2USB_OBJS += scsa2usb.o usb_ms_bulkonly.o usb_ms_cbi.o
+
+HWAHC_OBJS += hwahc.o hwahc_util.o
+
+WUSB_DF_OBJS += wusb_df.o
+WUSB_FWMOD_OBJS += wusb_fwmod.o
+
+IPF_OBJS += ip_fil_solaris.o fil.o solaris.o ip_state.o ip_frag.o ip_nat.o \
+	    ip_proxy.o ip_auth.o ip_pool.o ip_htable.o ip_lookup.o \
+	    ip_log.o misc.o ip_compat.o ip_nat6.o drand48.o
+
+IBD_OBJS +=	ibd.o ibd_cm.o
+
+EIBNX_OBJS +=	enx_main.o enx_hdlrs.o enx_ibt.o enx_log.o enx_fip.o \
+		enx_misc.o enx_q.o enx_ctl.o
+
+EOIB_OBJS +=	eib_adm.o eib_chan.o eib_cmn.o eib_ctl.o eib_data.o \
+		eib_fip.o eib_ibt.o eib_log.o eib_mac.o eib_main.o \
+		eib_rsrc.o eib_svc.o eib_vnic.o
+
+DLPISTUB_OBJS += dlpistub.o
+
+SDP_OBJS +=	sdpddi.o
+
+TRILL_OBJS +=   trill.o
+
+CTF_OBJS += ctf_create.o ctf_decl.o ctf_error.o ctf_hash.o ctf_labels.o \
+	ctf_lookup.o ctf_open.o ctf_types.o ctf_util.o ctf_subr.o ctf_mod.o
+
+SMBIOS_OBJS += smb_error.o smb_info.o smb_open.o smb_subr.o smb_dev.o
+
+RPCIB_OBJS += rpcib.o
+
+KMDB_OBJS += kdrv.o
+
+AFE_OBJS += afe.o
+
+BGE_OBJS += bge_main2.o bge_chip2.o bge_kstats.o bge_log.o bge_ndd.o \
+		bge_atomic.o bge_mii.o bge_send.o bge_recv2.o bge_mii_5906.o
+
+DMFE_OBJS += dmfe_log.o dmfe_main.o dmfe_mii.o
+
+ELXL_OBJS += elxl.o
+
+HME_OBJS += hme.o
+
+IXGB_OBJS += ixgb.o ixgb_atomic.o ixgb_chip.o ixgb_gld.o ixgb_kstats.o \
+		ixgb_log.o ixgb_ndd.o ixgb_rx.o ixgb_tx.o ixgb_xmii.o
+
+NGE_OBJS += nge_main.o nge_atomic.o nge_chip.o nge_ndd.o nge_kstats.o \
+		nge_log.o nge_rx.o nge_tx.o nge_xmii.o
+
+RGE_OBJS += rge_main.o rge_chip.o rge_ndd.o rge_kstats.o rge_log.o rge_rxtx.o
+
+URTW_OBJS += urtw.o
+
+ARN_OBJS += arn_hw.o arn_eeprom.o arn_mac.o arn_calib.o arn_ani.o arn_phy.o arn_regd.o arn_beacon.o \
+		arn_main.o arn_recv.o arn_xmit.o arn_rc.o
+
+ATH_OBJS += ath_aux.o ath_main.o ath_osdep.o ath_rate.o
+
+ATU_OBJS += atu.o
+
+IPW_OBJS += ipw2100_hw.o ipw2100.o
+
+IWI_OBJS += ipw2200_hw.o ipw2200.o
+
+IWH_OBJS += iwh.o
+
+IWK_OBJS += iwk2.o
+
+IWP_OBJS += iwp.o
+
+MWL_OBJS += mwl.o
+
+MWLFW_OBJS += mwlfw_mode.o
+
+WPI_OBJS += wpi.o
+
+RAL_OBJS += rt2560.o ral_rate.o
+
+RUM_OBJS += rum.o
+
+RWD_OBJS += rt2661.o
+
+RWN_OBJS += rt2860.o
+
+UATH_OBJS += uath.o
+
+UATHFW_OBJS += uathfw_mod.o
+
+URAL_OBJS += ural.o
+
+RTW_OBJS += rtw.o smc93cx6.o rtwphy.o rtwphyio.o
+
+ZYD_OBJS += zyd.o zyd_usb.o zyd_hw.o zyd_fw.o
+
+MXFE_OBJS += mxfe.o
+
+MPTSAS_OBJS += mptsas.o mptsas_impl.o mptsas_init.o mptsas_raid.o mptsas_smhba.o
+
+SFE_OBJS += sfe.o sfe_util.o
+
+BFE_OBJS += bfe.o
+
+BRIDGE_OBJS += bridge.o
+
+IDM_SHARED_OBJS += base64.o
+
+IDM_OBJS +=	$(IDM_SHARED_OBJS) \
+		idm.o idm_impl.o idm_text.o idm_conn_sm.o idm_so.o
+
+VR_OBJS += vr.o
+
+ATGE_OBJS += atge_main.o atge_l1e.o atge_mii.o atge_l1.o
+
+YGE_OBJS = yge.o
+
+#
+#	Build up defines and paths.
+#
+LINT_DEFS	+= -Dunix
+
+#
+#	This duality can be removed when the native and target compilers
+#	are the same (or at least recognize the same command line syntax!)
+#	It is a bug in the current compilation system that the assember
+#	can't process the -Y I, flag.
+#
+NATIVE_INC_PATH += $(INC_PATH) $(CCYFLAG)$(UTSBASE)/common
+AS_INC_PATH	+= $(INC_PATH) -I$(UTSBASE)/common
+INCLUDE_PATH    += $(INC_PATH) $(CCYFLAG)$(UTSBASE)/common
+
+PCIEB_OBJS += pcieb.o
+
+#	Chelsio N110 10G NIC driver module
+#
+CH_OBJS = ch.o glue.o pe.o sge.o
+
+CH_COM_OBJS =	ch_mac.o ch_subr.o cspi.o espi.o ixf1010.o mc3.o mc4.o mc5.o \
+		mv88e1xxx.o mv88x201x.o my3126.o pm3393.o tp.o ulp.o \
+		vsc7321.o vsc7326.o xpak.o
+
+#
+#	PCI strings file
+#
+PCI_STRING_OBJS = pci_strings.o
+
+NET_DACF_OBJS += net_dacf.o
+
+#
+#	Xframe 10G NIC driver module
+#
+XGE_OBJS = xge.o xgell.o
+
+XGE_HAL_OBJS =  xgehal-channel.o xgehal-fifo.o xgehal-ring.o  xgehal-config.o \
+		xgehal-driver.o  xgehal-mm.o xgehal-stats.o  xgehal-device.o \
+		xge-queue.o  xgehal-mgmt.o xgehal-mgmtaux.o
+
+#
+#	e1000g module
+#
+E1000G_OBJS +=	e1000_80003es2lan.o e1000_82540.o e1000_82541.o e1000_82542.o \
+		e1000_82543.o e1000_82571.o e1000_api.o e1000_ich8lan.o \
+		e1000_mac.o e1000_manage.o e1000_nvm.o e1000_osdep.o \
+		e1000_phy.o e1000g_debug.o e1000g_main.o e1000g_alloc.o \
+		e1000g_tx.o e1000g_rx.o e1000g_stat.o
+
+#
+#	Intel 82575 1G NIC driver module
+#
+IGB_OBJS =	igb_82575.o igb_api.o igb_mac.o igb_manage.o \
+		igb_nvm.o igb_osdep.o igb_phy.o igb_buf.o \
+		igb_debug.o igb_gld.o igb_log.o igb_main.o \
+		igb_rx.o igb_stat.o igb_tx.o
+
+#
+#       Intel 10GbE PCIE NIC driver module
+#
+IXGBE_OBJS =    ixgbe_82598.o ixgbe_82599.o ixgbe_api.o		\
+                ixgbe_common.o ixgbe_phy.o			\
+                ixgbe_buf.o ixgbe_debug.o ixgbe_gld.o           \
+                ixgbe_log.o ixgbe_main.o 	                \
+                ixgbe_osdep.o ixgbe_rx.o ixgbe_stat.o           \
+                ixgbe_tx.o
+
+#
+#	NIU 10G/1G driver module
+#
+NXGE_OBJS =	nxge_mac.o nxge_ipp.o nxge_rxdma.o		\
+		nxge_txdma.o nxge_txc.o nxge_main.o		\
+		nxge_hw.o nxge_fzc.o nxge_virtual.o		\
+		nxge_send.o nxge_classify.o nxge_fflp.o		\
+		nxge_fflp_hash.o nxge_ndd.o nxge_kstats.o	\
+		nxge_zcp.o nxge_fm.o nxge_espc.o nxge_hv.o	\
+		nxge_hio.o nxge_hio_guest.o nxge_intr.o
+
+NXGE_NPI_OBJS =	\
+		npi.o npi_mac.o npi_ipp.o			\
+		npi_txdma.o npi_rxdma.o npi_txc.o		\
+		npi_zcp.o npi_espc.o npi_fflp.o			\
+		npi_vir.o
+
+NXGE_HCALL_OBJS =	\
+		nxge_hcall.o
+
+#
+#	kiconv modules
+#
+KICONV_EMEA_OBJS += kiconv_emea.o
+
+#
+#	blk2scsa
+#
+BLK2SCSA_OBJS = blk2scsa.o
+
+KICONV_JA_OBJS += kiconv_ja.o
+
+KICONV_KO_OBJS += kiconv_cck_common.o kiconv_ko.o
+
+KICONV_SC_OBJS += kiconv_cck_common.o kiconv_sc.o
+
+KICONV_TC_OBJS += kiconv_cck_common.o kiconv_tc.o
+
+#
+#	AAC module
+#
+AAC_OBJS = aac.o aac_ioctl.o
+
+#
+#	sdcard modules
+#
+SDA_OBJS =	sda_cmd.o sda_host.o sda_init.o sda_mem.o sda_mod.o sda_slot.o
+SDHOST_OBJS =	sdhost.o
+
+#
+#	hxge 10G driver module
+#
+HXGE_OBJS =	hxge_main.o hxge_vmac.o hxge_send.o		\
+		hxge_txdma.o hxge_rxdma.o hxge_virtual.o	\
+		hxge_fm.o hxge_fzc.o hxge_hw.o hxge_kstats.o	\
+		hxge_ndd.o hxge_pfc.o				\
+		hpi.o hpi_vmac.o hpi_rxdma.o hpi_txdma.o	\
+		hpi_vir.o hpi_pfc.o
+
+#
+#	MEGARAID_SAS module
+#
+MEGA_SAS_OBJS = megaraid_sas.o
+
+#
+#	MR_SAS module
+#
+MR_SAS_OBJS = mr_sas.o
+
+#
+#	ISCSI_INITIATOR module
+#
+ISCSI_INITIATOR_OBJS =	chap.o iscsi_io.o iscsi_thread.o	\
+			iscsi_ioctl.o iscsid.o iscsi.o		\
+			iscsi_login.o isns_client.o iscsiAuthClient.o	\
+			iscsi_lun.o iscsiAuthClientGlue.o	\
+			iscsi_net.o nvfile.o iscsi_cmd.o	\
+			iscsi_queue.o persistent.o iscsi_conn.o	\
+			iscsi_sess.o radius_auth.o iscsi_crc.o	\
+			iscsi_stats.o radius_packet.o iscsi_doorclt.o	\
+			iscsi_targetparam.o utils.o kifconf.o
+
+#
+#	ntxn 10Gb/1Gb NIC driver module
+#
+NTXN_OBJS =	unm_nic_init.o unm_gem.o unm_nic_hw.o unm_ndd.o	\
+			unm_nic_main.o unm_nic_isr.o unm_nic_ctx.o niu.o
+
+#
+#	Myricom 10Gb NIC driver module
+#
+MYRI10GE_OBJS =	myri10ge.o myri10ge_lro.o
+
+#	nulldriver module
+#
+NULLDRIVER_OBJS =	nulldriver.o
+
+TPM_OBJS =	tpm.o tpm_hcall.o
diff --git a/uts/common/dtrace/dtrace.c b/uts/common/dtrace/dtrace.c
index c721386280f8..2a9df6d403f2 100644
--- a/uts/common/dtrace/dtrace.c
+++ b/uts/common/dtrace/dtrace.c
@@ -20,12 +20,9 @@
  */
 
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 /*
  * DTrace - Dynamic Tracing for Solaris
  *
@@ -186,7 +183,9 @@ static dtrace_ecb_t	*dtrace_ecb_create_cache; /* cached created ECB */
 static dtrace_genid_t	dtrace_probegen;	/* current probe generation */
 static dtrace_helpers_t *dtrace_deferred_pid;	/* deferred helper list */
 static dtrace_enabling_t *dtrace_retained;	/* list of retained enablings */
+static dtrace_genid_t	dtrace_retained_gen;	/* current retained enab gen */
 static dtrace_dynvar_t	dtrace_dynhash_sink;	/* end of dynamic hash chains */
+static int		dtrace_dynvar_failclean; /* dynvars failed to clean */
 
 /*
  * DTrace Locking
@@ -240,10 +239,16 @@ static void
 dtrace_nullop(void)
 {}
 
+static int
+dtrace_enable_nullop(void)
+{
+	return (0);
+}
+
 static dtrace_pops_t	dtrace_provider_ops = {
 	(void (*)(void *, const dtrace_probedesc_t *))dtrace_nullop,
 	(void (*)(void *, struct modctl *))dtrace_nullop,
-	(void (*)(void *, dtrace_id_t, void *))dtrace_nullop,
+	(int (*)(void *, dtrace_id_t, void *))dtrace_enable_nullop,
 	(void (*)(void *, dtrace_id_t, void *))dtrace_nullop,
 	(void (*)(void *, dtrace_id_t, void *))dtrace_nullop,
 	(void (*)(void *, dtrace_id_t, void *))dtrace_nullop,
@@ -427,6 +432,7 @@ dtrace_load##bits(uintptr_t addr)					\
 #define	DTRACE_DYNHASH_SINK	1
 #define	DTRACE_DYNHASH_VALID	2
 
+#define	DTRACE_MATCH_FAIL	-1
 #define	DTRACE_MATCH_NEXT	0
 #define	DTRACE_MATCH_DONE	1
 #define	DTRACE_ANCHORED(probe)	((probe)->dtpr_func[0] != '\0')
@@ -1182,12 +1188,12 @@ dtrace_dynvar_clean(dtrace_dstate_t *dstate)
 {
 	dtrace_dynvar_t *dirty;
 	dtrace_dstate_percpu_t *dcpu;
-	int i, work = 0;
+	dtrace_dynvar_t **rinsep;
+	int i, j, work = 0;
 
 	for (i = 0; i < NCPU; i++) {
 		dcpu = &dstate->dtds_percpu[i];
-
-		ASSERT(dcpu->dtdsc_rinsing == NULL);
+		rinsep = &dcpu->dtdsc_rinsing;
 
 		/*
 		 * If the dirty list is NULL, there is no dirty work to do.
@@ -1195,14 +1201,62 @@ dtrace_dynvar_clean(dtrace_dstate_t *dstate)
 		if (dcpu->dtdsc_dirty == NULL)
 			continue;
 
-		/*
-		 * If the clean list is non-NULL, then we're not going to do
-		 * any work for this CPU -- it means that there has not been
-		 * a dtrace_dynvar() allocation on this CPU (or from this CPU)
-		 * since the last time we cleaned house.
-		 */
-		if (dcpu->dtdsc_clean != NULL)
+		if (dcpu->dtdsc_rinsing != NULL) {
+			/*
+			 * If the rinsing list is non-NULL, then it is because
+			 * this CPU was selected to accept another CPU's
+			 * dirty list -- and since that time, dirty buffers
+			 * have accumulated.  This is a highly unlikely
+			 * condition, but we choose to ignore the dirty
+			 * buffers -- they'll be picked up a future cleanse.
+			 */
 			continue;
+		}
+
+		if (dcpu->dtdsc_clean != NULL) {
+			/*
+			 * If the clean list is non-NULL, then we're in a
+			 * situation where a CPU has done deallocations (we
+			 * have a non-NULL dirty list) but no allocations (we
+			 * also have a non-NULL clean list).  We can't simply
+			 * move the dirty list into the clean list on this
+			 * CPU, yet we also don't want to allow this condition
+			 * to persist, lest a short clean list prevent a
+			 * massive dirty list from being cleaned (which in
+			 * turn could lead to otherwise avoidable dynamic
+			 * drops).  To deal with this, we look for some CPU
+			 * with a NULL clean list, NULL dirty list, and NULL
+			 * rinsing list -- and then we borrow this CPU to
+			 * rinse our dirty list.
+			 */
+			for (j = 0; j < NCPU; j++) {
+				dtrace_dstate_percpu_t *rinser;
+
+				rinser = &dstate->dtds_percpu[j];
+
+				if (rinser->dtdsc_rinsing != NULL)
+					continue;
+
+				if (rinser->dtdsc_dirty != NULL)
+					continue;
+
+				if (rinser->dtdsc_clean != NULL)
+					continue;
+
+				rinsep = &rinser->dtdsc_rinsing;
+				break;
+			}
+
+			if (j == NCPU) {
+				/*
+				 * We were unable to find another CPU that
+				 * could accept this dirty list -- we are
+				 * therefore unable to clean it now.
+				 */
+				dtrace_dynvar_failclean++;
+				continue;
+			}
+		}
 
 		work = 1;
 
@@ -1219,7 +1273,7 @@ dtrace_dynvar_clean(dtrace_dstate_t *dstate)
 			 * on a hash chain, either the dirty list or the
 			 * rinsing list for some CPU must be non-NULL.)
 			 */
-			dcpu->dtdsc_rinsing = dirty;
+			*rinsep = dirty;
 			dtrace_membar_producer();
 		} while (dtrace_casptr(&dcpu->dtdsc_dirty,
 		    dirty, NULL) != dirty);
@@ -1650,7 +1704,7 @@ retry:
 			ASSERT(clean->dtdv_hashval == DTRACE_DYNHASH_FREE);
 
 			/*
-			 * Now we'll move the clean list to the free list.
+			 * Now we'll move the clean list to our free list.
 			 * It's impossible for this to fail:  the only way
 			 * the free list can be updated is through this
 			 * code path, and only one CPU can own the clean list.
@@ -1663,6 +1717,7 @@ retry:
 			 * owners of the clean lists out before resetting
 			 * the clean lists.
 			 */
+			dcpu = &dstate->dtds_percpu[me];
 			rval = dtrace_casptr(&dcpu->dtdsc_free, NULL, clean);
 			ASSERT(rval == NULL);
 			goto retry;
@@ -3600,7 +3655,7 @@ dtrace_dif_subr(uint_t subr, uint_t rd, uint64_t *regs,
 		int64_t index = (int64_t)tupregs[1].dttk_value;
 		int64_t remaining = (int64_t)tupregs[2].dttk_value;
 		size_t len = dtrace_strlen((char *)s, size);
-		int64_t i = 0;
+		int64_t i;
 
 		if (!dtrace_canload(s, len + 1, mstate, vstate)) {
 			regs[rd] = NULL;
@@ -6655,7 +6710,7 @@ dtrace_match(const dtrace_probekey_t *pkp, uint32_t priv, uid_t uid,
 {
 	dtrace_probe_t template, *probe;
 	dtrace_hash_t *hash = NULL;
-	int len, best = INT_MAX, nmatched = 0;
+	int len, rc, best = INT_MAX, nmatched = 0;
 	dtrace_id_t i;
 
 	ASSERT(MUTEX_HELD(&dtrace_lock));
@@ -6667,7 +6722,8 @@ dtrace_match(const dtrace_probekey_t *pkp, uint32_t priv, uid_t uid,
 	if (pkp->dtpk_id != DTRACE_IDNONE) {
 		if ((probe = dtrace_probe_lookup_id(pkp->dtpk_id)) != NULL &&
 		    dtrace_match_probe(probe, pkp, priv, uid, zoneid) > 0) {
-			(void) (*matched)(probe, arg);
+			if ((*matched)(probe, arg) == DTRACE_MATCH_FAIL)
+				return (DTRACE_MATCH_FAIL);
 			nmatched++;
 		}
 		return (nmatched);
@@ -6714,8 +6770,12 @@ dtrace_match(const dtrace_probekey_t *pkp, uint32_t priv, uid_t uid,
 
 			nmatched++;
 
-			if ((*matched)(probe, arg) != DTRACE_MATCH_NEXT)
+			if ((rc = (*matched)(probe, arg)) !=
+			    DTRACE_MATCH_NEXT) {
+				if (rc == DTRACE_MATCH_FAIL)
+					return (DTRACE_MATCH_FAIL);
 				break;
+			}
 		}
 
 		return (nmatched);
@@ -6734,8 +6794,11 @@ dtrace_match(const dtrace_probekey_t *pkp, uint32_t priv, uid_t uid,
 
 		nmatched++;
 
-		if ((*matched)(probe, arg) != DTRACE_MATCH_NEXT)
+		if ((rc = (*matched)(probe, arg)) != DTRACE_MATCH_NEXT) {
+			if (rc == DTRACE_MATCH_FAIL)
+				return (DTRACE_MATCH_FAIL);
 			break;
+		}
 	}
 
 	return (nmatched);
@@ -6955,7 +7018,7 @@ dtrace_unregister(dtrace_provider_id_t id)
 	dtrace_probe_t *probe, *first = NULL;
 
 	if (old->dtpv_pops.dtps_enable ==
-	    (void (*)(void *, dtrace_id_t, void *))dtrace_nullop) {
+	    (int (*)(void *, dtrace_id_t, void *))dtrace_enable_nullop) {
 		/*
 		 * If DTrace itself is the provider, we're called with locks
 		 * already held.
@@ -7101,7 +7164,7 @@ dtrace_invalidate(dtrace_provider_id_t id)
 	dtrace_provider_t *pvp = (dtrace_provider_t *)id;
 
 	ASSERT(pvp->dtpv_pops.dtps_enable !=
-	    (void (*)(void *, dtrace_id_t, void *))dtrace_nullop);
+	    (int (*)(void *, dtrace_id_t, void *))dtrace_enable_nullop);
 
 	mutex_enter(&dtrace_provider_lock);
 	mutex_enter(&dtrace_lock);
@@ -7142,7 +7205,7 @@ dtrace_condense(dtrace_provider_id_t id)
 	 * Make sure this isn't the dtrace provider itself.
 	 */
 	ASSERT(prov->dtpv_pops.dtps_enable !=
-	    (void (*)(void *, dtrace_id_t, void *))dtrace_nullop);
+	    (int (*)(void *, dtrace_id_t, void *))dtrace_enable_nullop);
 
 	mutex_enter(&dtrace_provider_lock);
 	mutex_enter(&dtrace_lock);
@@ -8103,7 +8166,7 @@ dtrace_difo_validate(dtrace_difo_t *dp, dtrace_vstate_t *vstate, uint_t nregs,
 			break;
 
 		default:
-			err += efunc(dp->dtdo_len - 1, "bad return size");
+			err += efunc(dp->dtdo_len - 1, "bad return size\n");
 		}
 	}
 
@@ -9096,7 +9159,7 @@ dtrace_ecb_add(dtrace_state_t *state, dtrace_probe_t *probe)
 	return (ecb);
 }
 
-static void
+static int
 dtrace_ecb_enable(dtrace_ecb_t *ecb)
 {
 	dtrace_probe_t *probe = ecb->dte_probe;
@@ -9109,7 +9172,7 @@ dtrace_ecb_enable(dtrace_ecb_t *ecb)
 		/*
 		 * This is the NULL probe -- there's nothing to do.
 		 */
-		return;
+		return (0);
 	}
 
 	if (probe->dtpr_ecb == NULL) {
@@ -9123,8 +9186,8 @@ dtrace_ecb_enable(dtrace_ecb_t *ecb)
 		if (ecb->dte_predicate != NULL)
 			probe->dtpr_predcache = ecb->dte_predicate->dtp_cacheid;
 
-		prov->dtpv_pops.dtps_enable(prov->dtpv_arg,
-		    probe->dtpr_id, probe->dtpr_arg);
+		return (prov->dtpv_pops.dtps_enable(prov->dtpv_arg,
+		    probe->dtpr_id, probe->dtpr_arg));
 	} else {
 		/*
 		 * This probe is already active.  Swing the last pointer to
@@ -9137,6 +9200,7 @@ dtrace_ecb_enable(dtrace_ecb_t *ecb)
 		probe->dtpr_predcache = 0;
 
 		dtrace_sync();
+		return (0);
 	}
 }
 
@@ -9920,7 +9984,9 @@ dtrace_ecb_create_enable(dtrace_probe_t *probe, void *arg)
 	if ((ecb = dtrace_ecb_create(state, probe, enab)) == NULL)
 		return (DTRACE_MATCH_DONE);
 
-	dtrace_ecb_enable(ecb);
+	if (dtrace_ecb_enable(ecb) < 0)
+		return (DTRACE_MATCH_FAIL);
+
 	return (DTRACE_MATCH_NEXT);
 }
 
@@ -10557,6 +10623,7 @@ dtrace_enabling_destroy(dtrace_enabling_t *enab)
 		ASSERT(enab->dten_vstate->dtvs_state != NULL);
 		ASSERT(enab->dten_vstate->dtvs_state->dts_nretained > 0);
 		enab->dten_vstate->dtvs_state->dts_nretained--;
+		dtrace_retained_gen++;
 	}
 
 	if (enab->dten_prev == NULL) {
@@ -10599,6 +10666,7 @@ dtrace_enabling_retain(dtrace_enabling_t *enab)
 		return (ENOSPC);
 
 	state->dts_nretained++;
+	dtrace_retained_gen++;
 
 	if (dtrace_retained == NULL) {
 		dtrace_retained = enab;
@@ -10713,7 +10781,7 @@ static int
 dtrace_enabling_match(dtrace_enabling_t *enab, int *nmatched)
 {
 	int i = 0;
-	int matched = 0;
+	int total_matched = 0, matched = 0;
 
 	ASSERT(MUTEX_HELD(&cpu_lock));
 	ASSERT(MUTEX_HELD(&dtrace_lock));
@@ -10724,7 +10792,14 @@ dtrace_enabling_match(dtrace_enabling_t *enab, int *nmatched)
 		enab->dten_current = ep;
 		enab->dten_error = 0;
 
-		matched += dtrace_probe_enable(&ep->dted_probe, enab);
+		/*
+		 * If a provider failed to enable a probe then get out and
+		 * let the consumer know we failed.
+		 */
+		if ((matched = dtrace_probe_enable(&ep->dted_probe, enab)) < 0)
+			return (EBUSY);
+
+		total_matched += matched;
 
 		if (enab->dten_error != 0) {
 			/*
@@ -10752,7 +10827,7 @@ dtrace_enabling_match(dtrace_enabling_t *enab, int *nmatched)
 
 	enab->dten_probegen = dtrace_probegen;
 	if (nmatched != NULL)
-		*nmatched = matched;
+		*nmatched = total_matched;
 
 	return (0);
 }
@@ -10766,13 +10841,22 @@ dtrace_enabling_matchall(void)
 	mutex_enter(&dtrace_lock);
 
 	/*
-	 * Because we can be called after dtrace_detach() has been called, we
-	 * cannot assert that there are retained enablings.  We can safely
-	 * load from dtrace_retained, however:  the taskq_destroy() at the
-	 * end of dtrace_detach() will block pending our completion.
+	 * Iterate over all retained enablings to see if any probes match
+	 * against them.  We only perform this operation on enablings for which
+	 * we have sufficient permissions by virtue of being in the global zone
+	 * or in the same zone as the DTrace client.  Because we can be called
+	 * after dtrace_detach() has been called, we cannot assert that there
+	 * are retained enablings.  We can safely load from dtrace_retained,
+	 * however:  the taskq_destroy() at the end of dtrace_detach() will
+	 * block pending our completion.
 	 */
-	for (enab = dtrace_retained; enab != NULL; enab = enab->dten_next)
-		(void) dtrace_enabling_match(enab, NULL);
+	for (enab = dtrace_retained; enab != NULL; enab = enab->dten_next) {
+		cred_t *cr = enab->dten_vstate->dtvs_state->dts_cred.dcr_cred;
+
+		if (INGLOBALZONE(curproc) ||
+		    cr != NULL && getzoneid() == crgetzoneid(cr))
+			(void) dtrace_enabling_match(enab, NULL);
+	}
 
 	mutex_exit(&dtrace_lock);
 	mutex_exit(&cpu_lock);
@@ -10830,6 +10914,7 @@ dtrace_enabling_provide(dtrace_provider_t *prv)
 {
 	int i, all = 0;
 	dtrace_probedesc_t desc;
+	dtrace_genid_t gen;
 
 	ASSERT(MUTEX_HELD(&dtrace_lock));
 	ASSERT(MUTEX_HELD(&dtrace_provider_lock));
@@ -10840,15 +10925,25 @@ dtrace_enabling_provide(dtrace_provider_t *prv)
 	}
 
 	do {
-		dtrace_enabling_t *enab = dtrace_retained;
+		dtrace_enabling_t *enab;
 		void *parg = prv->dtpv_arg;
 
-		for (; enab != NULL; enab = enab->dten_next) {
+retry:
+		gen = dtrace_retained_gen;
+		for (enab = dtrace_retained; enab != NULL;
+		    enab = enab->dten_next) {
 			for (i = 0; i < enab->dten_ndesc; i++) {
 				desc = enab->dten_desc[i]->dted_probe;
 				mutex_exit(&dtrace_lock);
 				prv->dtpv_pops.dtps_provide(parg, &desc);
 				mutex_enter(&dtrace_lock);
+				/*
+				 * Process the retained enablings again if
+				 * they have changed while we weren't holding
+				 * dtrace_lock.
+				 */
+				if (gen != dtrace_retained_gen)
+					goto retry;
 			}
 		}
 	} while (all && (prv = prv->dtpv_next) != NULL);
@@ -10970,7 +11065,8 @@ dtrace_dof_copyin(uintptr_t uarg, int *errp)
 
 	dof = kmem_alloc(hdr.dofh_loadsz, KM_SLEEP);
 
-	if (copyin((void *)uarg, dof, hdr.dofh_loadsz) != 0) {
+	if (copyin((void *)uarg, dof, hdr.dofh_loadsz) != 0 ||
+	    dof->dofh_loadsz != hdr.dofh_loadsz) {
 		kmem_free(dof, hdr.dofh_loadsz);
 		*errp = EFAULT;
 		return (NULL);
@@ -11698,6 +11794,13 @@ dtrace_dof_slurp(dof_hdr_t *dof, dtrace_vstate_t *vstate, cred_t *cr,
 			}
 		}
 
+		if (DOF_SEC_ISLOADABLE(sec->dofs_type) &&
+		    !(sec->dofs_flags & DOF_SECF_LOAD)) {
+			dtrace_dof_error(dof, "loadable section with load "
+			    "flag unset");
+			return (-1);
+		}
+
 		if (!(sec->dofs_flags & DOF_SECF_LOAD))
 			continue; /* just ignore non-loadable sections */
 
@@ -14390,7 +14493,8 @@ dtrace_open(dev_t *devp, int flag, int otyp, cred_t *cred_p)
 	 * If this wasn't an open with the "helper" minor, then it must be
 	 * the "dtrace" minor.
 	 */
-	ASSERT(getminor(*devp) == DTRACEMNRN_DTRACE);
+	if (getminor(*devp) != DTRACEMNRN_DTRACE)
+		return (ENXIO);
 
 	/*
 	 * If no DTRACE_PRIV_* bits are set in the credential, then the
@@ -14427,7 +14531,7 @@ dtrace_open(dev_t *devp, int flag, int otyp, cred_t *cred_p)
 	mutex_exit(&cpu_lock);
 
 	if (state == NULL) {
-		if (--dtrace_opens == 0)
+		if (--dtrace_opens == 0 && dtrace_anon.dta_enabling == NULL)
 			(void) kdi_dtrace_set(KDI_DTSET_DTRACE_DEACTIVATE);
 		mutex_exit(&dtrace_lock);
 		return (EAGAIN);
@@ -14463,7 +14567,12 @@ dtrace_close(dev_t dev, int flag, int otyp, cred_t *cred_p)
 
 	dtrace_state_destroy(state);
 	ASSERT(dtrace_opens > 0);
-	if (--dtrace_opens == 0)
+
+	/*
+	 * Only relinquish control of the kernel debugger interface when there
+	 * are no consumers and no anonymous enablings.
+	 */
+	if (--dtrace_opens == 0 && dtrace_anon.dta_enabling == NULL)
 		(void) kdi_dtrace_set(KDI_DTSET_DTRACE_DEACTIVATE);
 
 	mutex_exit(&dtrace_lock);
@@ -15458,7 +15567,8 @@ static struct dev_ops dtrace_ops = {
 	nodev,			/* reset */
 	&dtrace_cb_ops,		/* driver operations */
 	NULL,			/* bus operations */
-	nodev			/* dev power */
+	nodev,			/* dev power */
+	ddi_quiesce_not_needed,		/* quiesce */
 };
 
 static struct modldrv modldrv = {
diff --git a/uts/common/dtrace/fasttrap.c b/uts/common/dtrace/fasttrap.c
index b7ca92f54a59..42263e4ef274 100644
--- a/uts/common/dtrace/fasttrap.c
+++ b/uts/common/dtrace/fasttrap.c
@@ -20,11 +20,10 @@
  */
 
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
 
 #include <sys/atomic.h>
 #include <sys/errno.h>
@@ -876,7 +875,7 @@ fasttrap_disable_callbacks(void)
 }
 
 /*ARGSUSED*/
-static void
+static int
 fasttrap_pid_enable(void *arg, dtrace_id_t id, void *parg)
 {
 	fasttrap_probe_t *probe = parg;
@@ -904,7 +903,7 @@ fasttrap_pid_enable(void *arg, dtrace_id_t id, void *parg)
 	 * provider can't go away while we're in this code path.
 	 */
 	if (probe->ftp_prov->ftp_retired)
-		return;
+		return (0);
 
 	/*
 	 * If we can't find the process, it may be that we're in the context of
@@ -913,7 +912,7 @@ fasttrap_pid_enable(void *arg, dtrace_id_t id, void *parg)
 	 */
 	if ((p = sprlock(probe->ftp_pid)) == NULL) {
 		if ((curproc->p_flag & SFORKING) == 0)
-			return;
+			return (0);
 
 		mutex_enter(&pidlock);
 		p = prfind(probe->ftp_pid);
@@ -975,7 +974,7 @@ fasttrap_pid_enable(void *arg, dtrace_id_t id, void *parg)
 			 * drop our reference on the trap table entry.
 			 */
 			fasttrap_disable_callbacks();
-			return;
+			return (0);
 		}
 	}
 
@@ -983,6 +982,7 @@ fasttrap_pid_enable(void *arg, dtrace_id_t id, void *parg)
 	sprunlock(p);
 
 	probe->ftp_enabled = 1;
+	return (0);
 }
 
 /*ARGSUSED*/
@@ -1946,7 +1946,8 @@ fasttrap_ioctl(dev_t dev, int cmd, intptr_t arg, int md, cred_t *cr, int *rv)
 
 		probe = kmem_alloc(size, KM_SLEEP);
 
-		if (copyin(uprobe, probe, size) != 0) {
+		if (copyin(uprobe, probe, size) != 0 ||
+		    probe->ftps_noffs != noffs) {
 			kmem_free(probe, size);
 			return (EFAULT);
 		}
@@ -2044,13 +2045,6 @@ err:
 			    tp->ftt_proc->ftpc_acount != 0)
 				break;
 
-			/*
-			 * The count of active providers can only be
-			 * decremented (i.e. to zero) during exec, exit, and
-			 * removal of a meta provider so it should be
-			 * impossible to drop the count during this operation().
-			 */
-			ASSERT(tp->ftt_proc->ftpc_acount != 0);
 			tp = tp->ftt_next;
 		}
 
@@ -2346,7 +2340,8 @@ static struct dev_ops fasttrap_ops = {
 	nodev,			/* reset */
 	&fasttrap_cb_ops,	/* driver operations */
 	NULL,			/* bus operations */
-	nodev			/* dev power */
+	nodev,			/* dev power */
+	ddi_quiesce_not_needed,		/* quiesce */
 };
 
 /*
diff --git a/uts/common/dtrace/lockstat.c b/uts/common/dtrace/lockstat.c
index 3eb76a061d32..69c8b7254486 100644
--- a/uts/common/dtrace/lockstat.c
+++ b/uts/common/dtrace/lockstat.c
@@ -19,11 +19,10 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -84,7 +83,7 @@ static kmutex_t		lockstat_test;	/* for testing purposes only */
 static dtrace_provider_id_t lockstat_id;
 
 /*ARGSUSED*/
-static void
+static int
 lockstat_enable(void *arg, dtrace_id_t id, void *parg)
 {
 	lockstat_probe_t *probe = parg;
@@ -103,6 +102,7 @@ lockstat_enable(void *arg, dtrace_id_t id, void *parg)
 	 */
 	mutex_enter(&lockstat_test);
 	mutex_exit(&lockstat_test);
+	return (0);
 }
 
 /*ARGSUSED*/
@@ -310,11 +310,13 @@ static struct dev_ops lockstat_ops = {
 	nulldev,		/* reset */
 	&lockstat_cb_ops,	/* cb_ops */
 	NULL,			/* bus_ops */
+	NULL,			/* power */
+	ddi_quiesce_not_needed,		/* quiesce */
 };
 
 static struct modldrv modldrv = {
 	&mod_driverops,		/* Type of module.  This one is a driver */
-	"Lock Statistics %I%",	/* name of module */
+	"Lock Statistics",	/* name of module */
 	&lockstat_ops,		/* driver ops */
 };
 
diff --git a/uts/common/dtrace/profile.c b/uts/common/dtrace/profile.c
index 8de919a851a2..c1a2d1f1c12f 100644
--- a/uts/common/dtrace/profile.c
+++ b/uts/common/dtrace/profile.c
@@ -19,11 +19,10 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
 
 #include <sys/errno.h>
 #include <sys/stat.h>
@@ -361,7 +360,7 @@ profile_offline(void *arg, cpu_t *cpu, void *oarg)
 }
 
 /*ARGSUSED*/
-static void
+static int
 profile_enable(void *arg, dtrace_id_t id, void *parg)
 {
 	profile_probe_t *prof = parg;
@@ -391,6 +390,7 @@ profile_enable(void *arg, dtrace_id_t id, void *parg)
 	} else {
 		prof->prof_cyclic = cyclic_add_omni(&omni);
 	}
+	return (0);
 }
 
 /*ARGSUSED*/
@@ -539,7 +539,8 @@ static struct dev_ops profile_ops = {
 	nodev,			/* reset */
 	&profile_cb_ops,	/* driver operations */
 	NULL,			/* bus operations */
-	nodev			/* dev power */
+	nodev,			/* dev power */
+	ddi_quiesce_not_needed,		/* quiesce */
 };
 
 /*
diff --git a/uts/common/dtrace/sdt_subr.c b/uts/common/dtrace/sdt_subr.c
index 66ff8a92a01b..242185071bb2 100644
--- a/uts/common/dtrace/sdt_subr.c
+++ b/uts/common/dtrace/sdt_subr.c
@@ -19,12 +19,9 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 #include <sys/sdt_impl.h>
 
 static dtrace_pattr_t vtrace_attr = {
@@ -43,6 +40,14 @@ static dtrace_pattr_t info_attr = {
 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
 };
 
+static dtrace_pattr_t fc_attr = {
+{ DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_ISA },
+{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
+{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
+{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
+{ DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_ISA },
+};
+
 static dtrace_pattr_t fpu_attr = {
 { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_ISA },
 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
@@ -83,6 +88,14 @@ static dtrace_pattr_t xpv_attr = {
 { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_PLATFORM },
 };
 
+static dtrace_pattr_t iscsi_attr = {
+{ DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_ISA },
+{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
+{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
+{ DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_ISA },
+{ DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_ISA },
+};
+
 sdt_provider_t sdt_providers[] = {
 	{ "vtrace", "__vtrace_", &vtrace_attr, 0 },
 	{ "sysinfo", "__cpu_sysinfo_", &info_attr, 0 },
@@ -91,11 +104,17 @@ sdt_provider_t sdt_providers[] = {
 	{ "sched", "__sched_", &stab_attr, 0 },
 	{ "proc", "__proc_", &stab_attr, 0 },
 	{ "io", "__io_", &stab_attr, 0 },
+	{ "ip", "__ip_", &stab_attr, 0 },
+	{ "tcp", "__tcp_", &stab_attr, 0 },
+	{ "udp", "__udp_", &stab_attr, 0 },
 	{ "mib", "__mib_", &stab_attr, 0 },
 	{ "fsinfo", "__fsinfo_", &fsinfo_attr, 0 },
+	{ "iscsi", "__iscsi_", &iscsi_attr, 0 },
 	{ "nfsv3", "__nfsv3_", &stab_attr, 0 },
 	{ "nfsv4", "__nfsv4_", &stab_attr, 0 },
 	{ "xpv", "__xpv_", &xpv_attr, 0 },
+	{ "fc", "__fc_", &fc_attr, 0 },
+	{ "srp", "__srp_", &fc_attr, 0 },
 	{ "sysevent", "__sysevent_", &stab_attr, 0 },
 	{ "sdt", NULL, &sdt_attr, 0 },
 	{ NULL }
@@ -169,6 +188,73 @@ sdt_argdesc_t sdt_args[] = {
 	{ "fsinfo", NULL, 0, 0, "vnode_t *", "fileinfo_t *" },
 	{ "fsinfo", NULL, 1, 1, "int", "int" },
 
+	{ "iscsi", "async-send", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "async-send", 1, 1, "iscsi_async_evt_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "login-command", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "login-command", 1, 1, "iscsi_login_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "login-response", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "login-response", 1, 1, "iscsi_login_rsp_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "logout-command", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "logout-command", 1, 1, "iscsi_logout_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "logout-response", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "logout-response", 1, 1, "iscsi_logout_rsp_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "data-request", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "data-request", 1, 1, "iscsi_rtt_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "data-send", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "data-send", 1, 1, "iscsi_data_rsp_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "data-receive", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "data-receive", 1, 1, "iscsi_data_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "nop-send", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "nop-send", 1, 1, "iscsi_nop_in_hdr_t *", "iscsiinfo_t *" },
+	{ "iscsi", "nop-receive", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "nop-receive", 1, 1, "iscsi_nop_out_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "scsi-command", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "scsi-command", 1, 1, "iscsi_scsi_cmd_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "scsi-command", 2, 2, "scsi_task_t *", "scsicmd_t *" },
+	{ "iscsi", "scsi-response", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "scsi-response", 1, 1, "iscsi_scsi_rsp_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "task-command", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "task-command", 1, 1, "iscsi_scsi_task_mgt_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "task-response", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "task-response", 1, 1, "iscsi_scsi_task_mgt_rsp_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "text-command", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "text-command", 1, 1, "iscsi_text_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "text-response", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "text-response", 1, 1, "iscsi_text_rsp_hdr_t *",
+	    "iscsiinfo_t *" },
+	{ "iscsi", "xfer-start", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "xfer-start", 1, 0, "idm_conn_t *", "iscsiinfo_t *" },
+	{ "iscsi", "xfer-start", 2, 1, "uintptr_t", "xferinfo_t *" },
+	{ "iscsi", "xfer-start", 3, 2, "uint32_t"},
+	{ "iscsi", "xfer-start", 4, 3, "uintptr_t"},
+	{ "iscsi", "xfer-start", 5, 4, "uint32_t"},
+	{ "iscsi", "xfer-start", 6, 5, "uint32_t"},
+	{ "iscsi", "xfer-start", 7, 6, "uint32_t"},
+	{ "iscsi", "xfer-start", 8, 7, "int"},
+	{ "iscsi", "xfer-done", 0, 0, "idm_conn_t *", "conninfo_t *" },
+	{ "iscsi", "xfer-done", 1, 0, "idm_conn_t *", "iscsiinfo_t *" },
+	{ "iscsi", "xfer-done", 2, 1, "uintptr_t", "xferinfo_t *" },
+	{ "iscsi", "xfer-done", 3, 2, "uint32_t"},
+	{ "iscsi", "xfer-done", 4, 3, "uintptr_t"},
+	{ "iscsi", "xfer-done", 5, 4, "uint32_t"},
+	{ "iscsi", "xfer-done", 6, 5, "uint32_t"},
+	{ "iscsi", "xfer-done", 7, 6, "uint32_t"},
+	{ "iscsi", "xfer-done", 8, 7, "int"},
+
 	{ "nfsv3", "op-getattr-start", 0, 0, "struct svc_req *",
 	    "conninfo_t *" },
 	{ "nfsv3", "op-getattr-start", 1, 1, "nfsv3oparg_t *",
@@ -788,6 +874,75 @@ sdt_argdesc_t sdt_args[] = {
 	    "nfsv4cbinfo_t *" },
 	{ "nfsv4", "cb-recall-done", 2, 2, "CB_RECALL4res *" },
 
+	{ "ip", "send", 0, 0, "mblk_t *", "pktinfo_t *" },
+	{ "ip", "send", 1, 1, "conn_t *", "csinfo_t *" },
+	{ "ip", "send", 2, 2, "void_ip_t *", "ipinfo_t *" },
+	{ "ip", "send", 3, 3, "__dtrace_ipsr_ill_t *", "ifinfo_t *" },
+	{ "ip", "send", 4, 4, "ipha_t *", "ipv4info_t *" },
+	{ "ip", "send", 5, 5, "ip6_t *", "ipv6info_t *" },
+	{ "ip", "send", 6, 6, "int" }, /* used by __dtrace_ipsr_ill_t */
+	{ "ip", "receive", 0, 0, "mblk_t *", "pktinfo_t *" },
+	{ "ip", "receive", 1, 1, "conn_t *", "csinfo_t *" },
+	{ "ip", "receive", 2, 2, "void_ip_t *", "ipinfo_t *" },
+	{ "ip", "receive", 3, 3, "__dtrace_ipsr_ill_t *", "ifinfo_t *" },
+	{ "ip", "receive", 4, 4, "ipha_t *", "ipv4info_t *" },
+	{ "ip", "receive", 5, 5, "ip6_t *", "ipv6info_t *" },
+	{ "ip", "receive", 6, 6, "int" }, /* used by __dtrace_ipsr_ill_t */
+
+	{ "tcp", "connect-established", 0, 0, "mblk_t *", "pktinfo_t *" },
+	{ "tcp", "connect-established", 1, 1, "ip_xmit_attr_t *",
+	    "csinfo_t *" },
+	{ "tcp", "connect-established", 2, 2, "void_ip_t *", "ipinfo_t *" },
+	{ "tcp", "connect-established", 3, 3, "tcp_t *", "tcpsinfo_t *" },
+	{ "tcp", "connect-established", 4, 4, "tcph_t *", "tcpinfo_t *" },
+	{ "tcp", "connect-refused", 0, 0, "mblk_t *", "pktinfo_t *" },
+	{ "tcp", "connect-refused", 1, 1, "ip_xmit_attr_t *", "csinfo_t *" },
+	{ "tcp", "connect-refused", 2, 2, "void_ip_t *", "ipinfo_t *" },
+	{ "tcp", "connect-refused", 3, 3, "tcp_t *", "tcpsinfo_t *" },
+	{ "tcp", "connect-refused", 4, 4, "tcph_t *", "tcpinfo_t *" },
+	{ "tcp", "connect-request", 0, 0, "mblk_t *", "pktinfo_t *" },
+	{ "tcp", "connect-request", 1, 1, "ip_xmit_attr_t *", "csinfo_t *" },
+	{ "tcp", "connect-request", 2, 2, "void_ip_t *", "ipinfo_t *" },
+	{ "tcp", "connect-request", 3, 3, "tcp_t *", "tcpsinfo_t *" },
+	{ "tcp", "connect-request", 4, 4, "tcph_t *", "tcpinfo_t *" },
+	{ "tcp", "accept-established", 0, 0, "mblk_t *", "pktinfo_t *" },
+	{ "tcp", "accept-established", 1, 1, "ip_xmit_attr_t *", "csinfo_t *" },
+	{ "tcp", "accept-established", 2, 2, "void_ip_t *", "ipinfo_t *" },
+	{ "tcp", "accept-established", 3, 3, "tcp_t *", "tcpsinfo_t *" },
+	{ "tcp", "accept-established", 4, 4, "tcph_t *", "tcpinfo_t *" },
+	{ "tcp", "accept-refused", 0, 0, "mblk_t *", "pktinfo_t *" },
+	{ "tcp", "accept-refused", 1, 1, "ip_xmit_attr_t *", "csinfo_t *" },
+	{ "tcp", "accept-refused", 2, 2, "void_ip_t *", "ipinfo_t *" },
+	{ "tcp", "accept-refused", 3, 3, "tcp_t *", "tcpsinfo_t *" },
+	{ "tcp", "accept-refused", 4, 4, "tcph_t *", "tcpinfo_t *" },
+	{ "tcp", "state-change", 0, 0, "void", "void" },
+	{ "tcp", "state-change", 1, 1, "ip_xmit_attr_t *", "csinfo_t *" },
+	{ "tcp", "state-change", 2, 2, "void", "void" },
+	{ "tcp", "state-change", 3, 3, "tcp_t *", "tcpsinfo_t *" },
+	{ "tcp", "state-change", 4, 4, "void", "void" },
+	{ "tcp", "state-change", 5, 5, "int32_t", "tcplsinfo_t *" },
+	{ "tcp", "send", 0, 0, "mblk_t *", "pktinfo_t *" },
+	{ "tcp", "send", 1, 1, "ip_xmit_attr_t *", "csinfo_t *" },
+	{ "tcp", "send", 2, 2, "__dtrace_tcp_void_ip_t *", "ipinfo_t *" },
+	{ "tcp", "send", 3, 3, "tcp_t *", "tcpsinfo_t *" },
+	{ "tcp", "send", 4, 4, "__dtrace_tcp_tcph_t *", "tcpinfo_t *" },
+	{ "tcp", "receive", 0, 0, "mblk_t *", "pktinfo_t *" },
+	{ "tcp", "receive", 1, 1, "ip_xmit_attr_t *", "csinfo_t *" },
+	{ "tcp", "receive", 2, 2, "__dtrace_tcp_void_ip_t *", "ipinfo_t *" },
+	{ "tcp", "receive", 3, 3, "tcp_t *", "tcpsinfo_t *" },
+	{ "tcp", "receive", 4, 4, "__dtrace_tcp_tcph_t *", "tcpinfo_t *" },
+
+	{ "udp", "send", 0, 0, "mblk_t *", "pktinfo_t *" },
+	{ "udp", "send", 1, 1, "ip_xmit_attr_t *", "csinfo_t *" },
+	{ "udp", "send", 2, 2, "void_ip_t *", "ipinfo_t *" },
+	{ "udp", "send", 3, 3, "udp_t *", "udpsinfo_t *" },
+	{ "udp", "send", 4, 4, "udpha_t *", "udpinfo_t *" },
+	{ "udp", "receive", 0, 0, "mblk_t *", "pktinfo_t *" },
+	{ "udp", "receive", 1, 1, "ip_xmit_attr_t *", "csinfo_t *" },
+	{ "udp", "receive", 2, 2, "void_ip_t *", "ipinfo_t *" },
+	{ "udp", "receive", 3, 3, "udp_t *", "udpsinfo_t *" },
+	{ "udp", "receive", 4, 4, "udpha_t *", "udpinfo_t *" },
+
 	{ "sysevent", "post", 0, 0, "evch_bind_t *", "syseventchaninfo_t *" },
 	{ "sysevent", "post", 1, 1, "sysevent_impl_t *", "syseventinfo_t *" },
 
@@ -848,6 +1003,154 @@ sdt_argdesc_t sdt_args[] = {
 	{ "xpv", "setvcpucontext-end", 0, 0, "int" },
 	{ "xpv", "setvcpucontext-start", 0, 0, "domid_t" },
 	{ "xpv", "setvcpucontext-start", 1, 1, "vcpu_guest_context_t *" },
+
+	{ "srp", "service-up", 0, 0, "srpt_session_t *", "conninfo_t *" },
+	{ "srp", "service-up", 1, 0, "srpt_session_t *", "srp_portinfo_t *" },
+	{ "srp", "service-down", 0, 0, "srpt_session_t *", "conninfo_t *" },
+	{ "srp", "service-down", 1, 0, "srpt_session_t *",
+	    "srp_portinfo_t *" },
+	{ "srp", "login-command", 0, 0, "srpt_session_t *", "conninfo_t *" },
+	{ "srp", "login-command", 1, 0, "srpt_session_t *",
+	    "srp_portinfo_t *" },
+	{ "srp", "login-command", 2, 1, "srp_login_req_t *",
+	    "srp_logininfo_t *" },
+	{ "srp", "login-response", 0, 0, "srpt_session_t *", "conninfo_t *" },
+	{ "srp", "login-response", 1, 0, "srpt_session_t *",
+	    "srp_portinfo_t *" },
+	{ "srp", "login-response", 2, 1, "srp_login_rsp_t *",
+	    "srp_logininfo_t *" },
+	{ "srp", "login-response", 3, 2, "srp_login_rej_t *" },
+	{ "srp", "logout-command", 0, 0, "srpt_channel_t *", "conninfo_t *" },
+	{ "srp", "logout-command", 1, 0, "srpt_channel_t *",
+	    "srp_portinfo_t *" },
+	{ "srp", "task-command", 0, 0, "srpt_channel_t *", "conninfo_t *" },
+	{ "srp", "task-command", 1, 0, "srpt_channel_t *",
+	    "srp_portinfo_t *" },
+	{ "srp", "task-command", 2, 1, "srp_cmd_req_t *", "srp_taskinfo_t *" },
+	{ "srp", "task-response", 0, 0, "srpt_channel_t *", "conninfo_t *" },
+	{ "srp", "task-response", 1, 0, "srpt_channel_t *",
+	    "srp_portinfo_t *" },
+	{ "srp", "task-response", 2, 1, "srp_rsp_t *", "srp_taskinfo_t *" },
+	{ "srp", "task-response", 3, 2, "scsi_task_t *" },
+	{ "srp", "task-response", 4, 3, "int8_t" },
+	{ "srp", "scsi-command", 0, 0, "srpt_channel_t *", "conninfo_t *" },
+	{ "srp", "scsi-command", 1, 0, "srpt_channel_t *",
+	    "srp_portinfo_t *" },
+	{ "srp", "scsi-command", 2, 1, "scsi_task_t *", "scsicmd_t *" },
+	{ "srp", "scsi-command", 3, 2, "srp_cmd_req_t *", "srp_taskinfo_t *" },
+	{ "srp", "scsi-response", 0, 0, "srpt_channel_t *", "conninfo_t *" },
+	{ "srp", "scsi-response", 1, 0, "srpt_channel_t *",
+	    "srp_portinfo_t *" },
+	{ "srp", "scsi-response", 2, 1, "srp_rsp_t *", "srp_taskinfo_t *" },
+	{ "srp", "scsi-response", 3, 2, "scsi_task_t *" },
+	{ "srp", "scsi-response", 4, 3, "int8_t" },
+	{ "srp", "xfer-start", 0, 0, "srpt_channel_t *", "conninfo_t *" },
+	{ "srp", "xfer-start", 1, 0, "srpt_channel_t *",
+	    "srp_portinfo_t *" },
+	{ "srp", "xfer-start", 2, 1, "ibt_wr_ds_t *", "xferinfo_t *" },
+	{ "srp", "xfer-start", 3, 2, "srpt_iu_t *", "srp_taskinfo_t *" },
+	{ "srp", "xfer-start", 4, 3, "ibt_send_wr_t *"},
+	{ "srp", "xfer-start", 5, 4, "uint32_t" },
+	{ "srp", "xfer-start", 6, 5, "uint32_t" },
+	{ "srp", "xfer-start", 7, 6, "uint32_t" },
+	{ "srp", "xfer-start", 8, 7, "uint32_t" },
+	{ "srp", "xfer-done", 0, 0, "srpt_channel_t *", "conninfo_t *" },
+	{ "srp", "xfer-done", 1, 0, "srpt_channel_t *",
+	    "srp_portinfo_t *" },
+	{ "srp", "xfer-done", 2, 1, "ibt_wr_ds_t *", "xferinfo_t *" },
+	{ "srp", "xfer-done", 3, 2, "srpt_iu_t *", "srp_taskinfo_t *" },
+	{ "srp", "xfer-done", 4, 3, "ibt_send_wr_t *"},
+	{ "srp", "xfer-done", 5, 4, "uint32_t" },
+	{ "srp", "xfer-done", 6, 5, "uint32_t" },
+	{ "srp", "xfer-done", 7, 6, "uint32_t" },
+	{ "srp", "xfer-done", 8, 7, "uint32_t" },
+
+	{ "fc", "link-up",   0, 0, "fct_i_local_port_t *", "conninfo_t *" },
+	{ "fc", "link-down", 0, 0, "fct_i_local_port_t *", "conninfo_t *" },
+	{ "fc", "fabric-login-start", 0, 0, "fct_i_local_port_t *",
+	    "conninfo_t *" },
+	{ "fc", "fabric-login-start", 1, 0, "fct_i_local_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "fabric-login-end", 0, 0, "fct_i_local_port_t *",
+	    "conninfo_t *" },
+	{ "fc", "fabric-login-end", 1, 0, "fct_i_local_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "rport-login-start", 0, 0, "fct_cmd_t *",
+	    "conninfo_t *" },
+	{ "fc", "rport-login-start", 1, 1, "fct_local_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "rport-login-start", 2, 2, "fct_i_remote_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "rport-login-start", 3, 3, "int", "int" },
+	{ "fc", "rport-login-end", 0, 0, "fct_cmd_t *",
+	    "conninfo_t *" },
+	{ "fc", "rport-login-end", 1, 1, "fct_local_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "rport-login-end", 2, 2, "fct_i_remote_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "rport-login-end", 3, 3, "int", "int" },
+	{ "fc", "rport-login-end", 4, 4, "int", "int" },
+	{ "fc", "rport-logout-start", 0, 0, "fct_cmd_t *",
+	    "conninfo_t *" },
+	{ "fc", "rport-logout-start", 1, 1, "fct_local_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "rport-logout-start", 2, 2, "fct_i_remote_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "rport-logout-start", 3, 3, "int", "int" },
+	{ "fc", "rport-logout-end", 0, 0, "fct_cmd_t *",
+	    "conninfo_t *" },
+	{ "fc", "rport-logout-end", 1, 1, "fct_local_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "rport-logout-end", 2, 2, "fct_i_remote_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "rport-logout-end", 3, 3, "int", "int" },
+	{ "fc", "scsi-command", 0, 0, "fct_cmd_t *",
+	    "conninfo_t *" },
+	{ "fc", "scsi-command", 1, 1, "fct_i_local_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "scsi-command", 2, 2, "scsi_task_t *",
+	    "scsicmd_t *" },
+	{ "fc", "scsi-command", 3, 3, "fct_i_remote_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "scsi-response", 0, 0, "fct_cmd_t *",
+	    "conninfo_t *" },
+	{ "fc", "scsi-response", 1, 1, "fct_i_local_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "scsi-response", 2, 2, "scsi_task_t *",
+	    "scsicmd_t *" },
+	{ "fc", "scsi-response", 3, 3, "fct_i_remote_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "xfer-start", 0, 0, "fct_cmd_t *",
+	    "conninfo_t *" },
+	{ "fc", "xfer-start", 1, 1, "fct_i_local_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "xfer-start", 2, 2, "scsi_task_t *",
+	    "scsicmd_t *" },
+	{ "fc", "xfer-start", 3, 3, "fct_i_remote_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "xfer-start", 4, 4, "stmf_data_buf_t *",
+	    "fc_xferinfo_t *" },
+	{ "fc", "xfer-done", 0, 0, "fct_cmd_t *",
+	    "conninfo_t *" },
+	{ "fc", "xfer-done", 1, 1, "fct_i_local_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "xfer-done", 2, 2, "scsi_task_t *",
+	    "scsicmd_t *" },
+	{ "fc", "xfer-done", 3, 3, "fct_i_remote_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "xfer-done", 4, 4, "stmf_data_buf_t *",
+	    "fc_xferinfo_t *" },
+	{ "fc", "rscn-receive", 0, 0, "fct_i_local_port_t *",
+	    "conninfo_t *" },
+	{ "fc", "rscn-receive", 1, 1, "int", "int"},
+	{ "fc", "abts-receive", 0, 0, "fct_cmd_t *",
+	    "conninfo_t *" },
+	{ "fc", "abts-receive", 1, 1, "fct_i_local_port_t *",
+	    "fc_port_info_t *" },
+	{ "fc", "abts-receive", 2, 2, "fct_i_remote_port_t *",
+	    "fc_port_info_t *" },
+
+
 	{ NULL }
 };
 
diff --git a/uts/common/dtrace/systrace.c b/uts/common/dtrace/systrace.c
index be14660b04c0..b864041c450d 100644
--- a/uts/common/dtrace/systrace.c
+++ b/uts/common/dtrace/systrace.c
@@ -19,11 +19,10 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
 
 #include <sys/dtrace.h>
 #include <sys/systrace.h>
@@ -141,7 +140,7 @@ systrace_destroy(void *arg, dtrace_id_t id, void *parg)
 }
 
 /*ARGSUSED*/
-static void
+static int
 systrace_enable(void *arg, dtrace_id_t id, void *parg)
 {
 	int sysnum = SYSTRACE_SYSNUM((uintptr_t)parg);
@@ -162,7 +161,7 @@ systrace_enable(void *arg, dtrace_id_t id, void *parg)
 
 	if (enabled) {
 		ASSERT(sysent[sysnum].sy_callc == dtrace_systrace_syscall);
-		return;
+		return (0);
 	}
 
 	(void) casptr(&sysent[sysnum].sy_callc,
@@ -173,6 +172,7 @@ systrace_enable(void *arg, dtrace_id_t id, void *parg)
 	    (void *)systrace_sysent32[sysnum].stsy_underlying,
 	    (void *)dtrace_systrace_syscall32);
 #endif
+	return (0);
 }
 
 /*ARGSUSED*/
@@ -336,7 +336,8 @@ static struct dev_ops systrace_ops = {
 	nodev,			/* reset */
 	&systrace_cb_ops,	/* driver operations */
 	NULL,			/* bus operations */
-	nodev			/* dev power */
+	nodev,			/* dev power */
+	ddi_quiesce_not_needed,		/* quiesce */
 };
 
 /*
diff --git a/uts/common/fs/gfs.c b/uts/common/fs/gfs.c
new file mode 100644
index 000000000000..4d24df60f75b
--- /dev/null
+++ b/uts/common/fs/gfs.c
@@ -0,0 +1,1178 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/* Portions Copyright 2007 Shivakumar GN */
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/types.h>
+#include <sys/cmn_err.h>
+#include <sys/debug.h>
+#include <sys/dirent.h>
+#include <sys/kmem.h>
+#include <sys/mman.h>
+#include <sys/mutex.h>
+#include <sys/sysmacros.h>
+#include <sys/systm.h>
+#include <sys/sunddi.h>
+#include <sys/uio.h>
+#include <sys/vmsystm.h>
+#include <sys/vfs.h>
+#include <sys/vnode.h>
+
+#include <vm/as.h>
+#include <vm/seg_vn.h>
+
+#include <sys/gfs.h>
+
+/*
+ * Generic pseudo-filesystem routines.
+ *
+ * There are significant similarities between the implementation of certain file
+ * system entry points across different filesystems.  While one could attempt to
+ * "choke up on the bat" and incorporate common functionality into a VOP
+ * preamble or postamble, such an approach is limited in the benefit it can
+ * provide.  In this file we instead define a toolkit of routines which can be
+ * called from a filesystem (with in-kernel pseudo-filesystems being the focus
+ * of the exercise) in a more component-like fashion.
+ *
+ * There are three basic classes of routines:
+ *
+ * 1) Lowlevel support routines
+ *
+ *    These routines are designed to play a support role for existing
+ *    pseudo-filesystems (such as procfs).  They simplify common tasks,
+ *    without forcing the filesystem to hand over management to GFS.  The
+ *    routines covered are:
+ *
+ *	gfs_readdir_init()
+ *	gfs_readdir_emit()
+ *	gfs_readdir_emitn()
+ *	gfs_readdir_pred()
+ *	gfs_readdir_fini()
+ *	gfs_lookup_dot()
+ *
+ * 2) Complete GFS management
+ *
+ *    These routines take a more active role in management of the
+ *    pseudo-filesystem.  They handle the relationship between vnode private
+ *    data and VFS data, as well as the relationship between vnodes in the
+ *    directory hierarchy.
+ *
+ *    In order to use these interfaces, the first member of every private
+ *    v_data must be a gfs_file_t or a gfs_dir_t.  This hands over all control
+ *    to GFS.
+ *
+ * 	gfs_file_create()
+ * 	gfs_dir_create()
+ * 	gfs_root_create()
+ *
+ *	gfs_file_inactive()
+ *	gfs_dir_inactive()
+ *	gfs_dir_lookup()
+ *	gfs_dir_readdir()
+ *
+ * 	gfs_vop_inactive()
+ * 	gfs_vop_lookup()
+ * 	gfs_vop_readdir()
+ * 	gfs_vop_map()
+ *
+ * 3) Single File pseudo-filesystems
+ *
+ *    This routine creates a rooted file to be overlayed ontop of another
+ *    file in the physical filespace.
+ *
+ *    Note that the parent is NULL (actually the vfs), but there is nothing
+ *    technically keeping such a file from utilizing the "Complete GFS
+ *    management" set of routines.
+ *
+ * 	gfs_root_create_file()
+ */
+
+/*
+ * gfs_make_opsvec: take an array of vnode type definitions and create
+ * their vnodeops_t structures
+ *
+ * This routine takes an array of gfs_opsvec_t's.  It could
+ * alternatively take an array of gfs_opsvec_t*'s, which would allow
+ * vnode types to be completely defined in files external to the caller
+ * of gfs_make_opsvec().  As it stands, much more sharing takes place --
+ * both the caller and the vnode type provider need to access gfsv_ops
+ * and gfsv_template, and the caller also needs to know gfsv_name.
+ */
+int
+gfs_make_opsvec(gfs_opsvec_t *vec)
+{
+	int error, i;
+
+	for (i = 0; ; i++) {
+		if (vec[i].gfsv_name == NULL)
+			return (0);
+		error = vn_make_ops(vec[i].gfsv_name, vec[i].gfsv_template,
+		    vec[i].gfsv_ops);
+		if (error)
+			break;
+	}
+
+	cmn_err(CE_WARN, "gfs_make_opsvec: bad vnode ops template for '%s'",
+	    vec[i].gfsv_name);
+	for (i--; i >= 0; i--) {
+		vn_freevnodeops(*vec[i].gfsv_ops);
+		*vec[i].gfsv_ops = NULL;
+	}
+	return (error);
+}
+
+/*
+ * Low level directory routines
+ *
+ * These routines provide some simple abstractions for reading directories.
+ * They are designed to be used by existing pseudo filesystems (namely procfs)
+ * that already have a complicated management infrastructure.
+ */
+
+/*
+ * gfs_get_parent_ino: used to obtain a parent inode number and the
+ * inode number of the given vnode in preparation for calling gfs_readdir_init.
+ */
+int
+gfs_get_parent_ino(vnode_t *dvp, cred_t *cr, caller_context_t *ct,
+    ino64_t *pino, ino64_t *ino)
+{
+	vnode_t *parent;
+	gfs_dir_t *dp = dvp->v_data;
+	int error;
+
+	*ino = dp->gfsd_file.gfs_ino;
+	parent = dp->gfsd_file.gfs_parent;
+
+	if (parent == NULL) {
+		*pino = *ino;		/* root of filesystem */
+	} else if (dvp->v_flag & V_XATTRDIR) {
+		vattr_t va;
+
+		va.va_mask = AT_NODEID;
+		error = VOP_GETATTR(parent, &va, 0, cr, ct);
+		if (error)
+			return (error);
+		*pino = va.va_nodeid;
+	} else {
+		*pino = ((gfs_file_t *)(parent->v_data))->gfs_ino;
+	}
+
+	return (0);
+}
+
+/*
+ * gfs_readdir_init: initiate a generic readdir
+ *   st		- a pointer to an uninitialized gfs_readdir_state_t structure
+ *   name_max	- the directory's maximum file name length
+ *   ureclen	- the exported file-space record length (1 for non-legacy FSs)
+ *   uiop	- the uiop passed to readdir
+ *   parent	- the parent directory's inode
+ *   self	- this directory's inode
+ *   flags	- flags from VOP_READDIR
+ *
+ * Returns 0 or a non-zero errno.
+ *
+ * Typical VOP_READDIR usage of gfs_readdir_*:
+ *
+ *	if ((error = gfs_readdir_init(...)) != 0)
+ *		return (error);
+ *	eof = 0;
+ *	while ((error = gfs_readdir_pred(..., &voffset)) != 0) {
+ *		if (!consumer_entry_at(voffset))
+ *			voffset = consumer_next_entry(voffset);
+ *		if (consumer_eof(voffset)) {
+ *			eof = 1
+ *			break;
+ *		}
+ *		if ((error = gfs_readdir_emit(..., voffset,
+ *		    consumer_ino(voffset), consumer_name(voffset))) != 0)
+ *			break;
+ *	}
+ *	return (gfs_readdir_fini(..., error, eofp, eof));
+ *
+ * As you can see, a zero result from gfs_readdir_pred() or
+ * gfs_readdir_emit() indicates that processing should continue,
+ * whereas a non-zero result indicates that the loop should terminate.
+ * Most consumers need do nothing more than let gfs_readdir_fini()
+ * determine what the cause of failure was and return the appropriate
+ * value.
+ */
+int
+gfs_readdir_init(gfs_readdir_state_t *st, int name_max, int ureclen,
+    uio_t *uiop, ino64_t parent, ino64_t self, int flags)
+{
+	size_t dirent_size;
+
+	if (uiop->uio_loffset < 0 || uiop->uio_resid <= 0 ||
+	    (uiop->uio_loffset % ureclen) != 0)
+		return (EINVAL);
+
+	st->grd_ureclen = ureclen;
+	st->grd_oresid = uiop->uio_resid;
+	st->grd_namlen = name_max;
+	if (flags & V_RDDIR_ENTFLAGS)
+		dirent_size = EDIRENT_RECLEN(st->grd_namlen);
+	else
+		dirent_size = DIRENT64_RECLEN(st->grd_namlen);
+	st->grd_dirent = kmem_zalloc(dirent_size, KM_SLEEP);
+	st->grd_parent = parent;
+	st->grd_self = self;
+	st->grd_flags = flags;
+
+	return (0);
+}
+
+/*
+ * gfs_readdir_emit_int: internal routine to emit directory entry
+ *
+ *   st		- the current readdir state, which must have d_ino/ed_ino
+ *		  and d_name/ed_name set
+ *   uiop	- caller-supplied uio pointer
+ *   next	- the offset of the next entry
+ */
+static int
+gfs_readdir_emit_int(gfs_readdir_state_t *st, uio_t *uiop, offset_t next)
+{
+	int reclen;
+	dirent64_t *dp;
+	edirent_t *edp;
+
+	if (st->grd_flags & V_RDDIR_ENTFLAGS) {
+		edp = st->grd_dirent;
+		reclen = EDIRENT_RECLEN(strlen(edp->ed_name));
+	} else {
+		dp = st->grd_dirent;
+		reclen = DIRENT64_RECLEN(strlen(dp->d_name));
+	}
+
+	if (reclen > uiop->uio_resid) {
+		/*
+		 * Error if no entries were returned yet
+		 */
+		if (uiop->uio_resid == st->grd_oresid)
+			return (EINVAL);
+		return (-1);
+	}
+
+	if (st->grd_flags & V_RDDIR_ENTFLAGS) {
+		edp->ed_off = next;
+		edp->ed_reclen = (ushort_t)reclen;
+	} else {
+		dp->d_off = next;
+		dp->d_reclen = (ushort_t)reclen;
+	}
+
+	if (uiomove((caddr_t)st->grd_dirent, reclen, UIO_READ, uiop))
+		return (EFAULT);
+
+	uiop->uio_loffset = next;
+
+	return (0);
+}
+
+/*
+ * gfs_readdir_emit: emit a directory entry
+ *   voff       - the virtual offset (obtained from gfs_readdir_pred)
+ *   ino        - the entry's inode
+ *   name       - the entry's name
+ *   eflags	- value for ed_eflags (if processing edirent_t)
+ *
+ * Returns a 0 on success, a non-zero errno on failure, or -1 if the
+ * readdir loop should terminate.  A non-zero result (either errno or
+ * -1) from this function is typically passed directly to
+ * gfs_readdir_fini().
+ */
+int
+gfs_readdir_emit(gfs_readdir_state_t *st, uio_t *uiop, offset_t voff,
+    ino64_t ino, const char *name, int eflags)
+{
+	offset_t off = (voff + 2) * st->grd_ureclen;
+
+	if (st->grd_flags & V_RDDIR_ENTFLAGS) {
+		edirent_t *edp = st->grd_dirent;
+
+		edp->ed_ino = ino;
+		(void) strncpy(edp->ed_name, name, st->grd_namlen);
+		edp->ed_eflags = eflags;
+	} else {
+		dirent64_t *dp = st->grd_dirent;
+
+		dp->d_ino = ino;
+		(void) strncpy(dp->d_name, name, st->grd_namlen);
+	}
+
+	/*
+	 * Inter-entry offsets are invalid, so we assume a record size of
+	 * grd_ureclen and explicitly set the offset appropriately.
+	 */
+	return (gfs_readdir_emit_int(st, uiop, off + st->grd_ureclen));
+}
+
+/*
+ * gfs_readdir_emitn: like gfs_readdir_emit(), but takes an integer
+ * instead of a string for the entry's name.
+ */
+int
+gfs_readdir_emitn(gfs_readdir_state_t *st, uio_t *uiop, offset_t voff,
+    ino64_t ino, unsigned long num)
+{
+	char buf[40];
+
+	numtos(num, buf);
+	return (gfs_readdir_emit(st, uiop, voff, ino, buf, 0));
+}
+
+/*
+ * gfs_readdir_pred: readdir loop predicate
+ *   voffp - a pointer in which the next virtual offset should be stored
+ *
+ * Returns a 0 on success, a non-zero errno on failure, or -1 if the
+ * readdir loop should terminate.  A non-zero result (either errno or
+ * -1) from this function is typically passed directly to
+ * gfs_readdir_fini().
+ */
+int
+gfs_readdir_pred(gfs_readdir_state_t *st, uio_t *uiop, offset_t *voffp)
+{
+	offset_t off, voff;
+	int error;
+
+top:
+	if (uiop->uio_resid <= 0)
+		return (-1);
+
+	off = uiop->uio_loffset / st->grd_ureclen;
+	voff = off - 2;
+	if (off == 0) {
+		if ((error = gfs_readdir_emit(st, uiop, voff, st->grd_self,
+		    ".", 0)) == 0)
+			goto top;
+	} else if (off == 1) {
+		if ((error = gfs_readdir_emit(st, uiop, voff, st->grd_parent,
+		    "..", 0)) == 0)
+			goto top;
+	} else {
+		*voffp = voff;
+		return (0);
+	}
+
+	return (error);
+}
+
+/*
+ * gfs_readdir_fini: generic readdir cleanup
+ *   error	- if positive, an error to return
+ *   eofp	- the eofp passed to readdir
+ *   eof	- the eof value
+ *
+ * Returns a 0 on success, a non-zero errno on failure.  This result
+ * should be returned from readdir.
+ */
+int
+gfs_readdir_fini(gfs_readdir_state_t *st, int error, int *eofp, int eof)
+{
+	size_t dirent_size;
+
+	if (st->grd_flags & V_RDDIR_ENTFLAGS)
+		dirent_size = EDIRENT_RECLEN(st->grd_namlen);
+	else
+		dirent_size = DIRENT64_RECLEN(st->grd_namlen);
+	kmem_free(st->grd_dirent, dirent_size);
+	if (error > 0)
+		return (error);
+	if (eofp)
+		*eofp = eof;
+	return (0);
+}
+
+/*
+ * gfs_lookup_dot
+ *
+ * Performs a basic check for "." and ".." directory entries.
+ */
+int
+gfs_lookup_dot(vnode_t **vpp, vnode_t *dvp, vnode_t *pvp, const char *nm)
+{
+	if (*nm == '\0' || strcmp(nm, ".") == 0) {
+		VN_HOLD(dvp);
+		*vpp = dvp;
+		return (0);
+	} else if (strcmp(nm, "..") == 0) {
+		if (pvp == NULL) {
+			ASSERT(dvp->v_flag & VROOT);
+			VN_HOLD(dvp);
+			*vpp = dvp;
+		} else {
+			VN_HOLD(pvp);
+			*vpp = pvp;
+		}
+		return (0);
+	}
+
+	return (-1);
+}
+
+/*
+ * gfs_file_create(): create a new GFS file
+ *
+ *   size	- size of private data structure (v_data)
+ *   pvp	- parent vnode (GFS directory)
+ *   ops	- vnode operations vector
+ *
+ * In order to use this interface, the parent vnode must have been created by
+ * gfs_dir_create(), and the private data stored in v_data must have a
+ * 'gfs_file_t' as its first field.
+ *
+ * Given these constraints, this routine will automatically:
+ *
+ * 	- Allocate v_data for the vnode
+ * 	- Initialize necessary fields in the vnode
+ * 	- Hold the parent
+ */
+vnode_t *
+gfs_file_create(size_t size, vnode_t *pvp, vnodeops_t *ops)
+{
+	gfs_file_t *fp;
+	vnode_t *vp;
+
+	/*
+	 * Allocate vnode and internal data structure
+	 */
+	fp = kmem_zalloc(size, KM_SLEEP);
+	vp = vn_alloc(KM_SLEEP);
+
+	/*
+	 * Set up various pointers
+	 */
+	fp->gfs_vnode = vp;
+	fp->gfs_parent = pvp;
+	vp->v_data = fp;
+	fp->gfs_size = size;
+	fp->gfs_type = GFS_FILE;
+
+	/*
+	 * Initialize vnode and hold parent.
+	 */
+	vn_setops(vp, ops);
+	if (pvp) {
+		VN_SET_VFS_TYPE_DEV(vp, pvp->v_vfsp, VREG, 0);
+		VN_HOLD(pvp);
+	}
+
+	return (vp);
+}
+
+/*
+ * gfs_dir_create: creates a new directory in the parent
+ *
+ *   size	- size of private data structure (v_data)
+ *   pvp	- parent vnode (GFS directory)
+ *   ops	- vnode operations vector
+ *   entries	- NULL-terminated list of static entries (if any)
+ *   maxlen	- maximum length of a directory entry
+ *   readdir_cb	- readdir callback (see gfs_dir_readdir)
+ *   inode_cb	- inode callback (see gfs_dir_readdir)
+ *   lookup_cb	- lookup callback (see gfs_dir_lookup)
+ *
+ * In order to use this function, the first member of the private vnode
+ * structure (v_data) must be a gfs_dir_t.  For each directory, there are
+ * static entries, defined when the structure is initialized, and dynamic
+ * entries, retrieved through callbacks.
+ *
+ * If a directory has static entries, then it must supply a inode callback,
+ * which will compute the inode number based on the parent and the index.
+ * For a directory with dynamic entries, the caller must supply a readdir
+ * callback and a lookup callback.  If a static lookup fails, we fall back to
+ * the supplied lookup callback, if any.
+ *
+ * This function also performs the same initialization as gfs_file_create().
+ */
+vnode_t *
+gfs_dir_create(size_t struct_size, vnode_t *pvp, vnodeops_t *ops,
+    gfs_dirent_t *entries, gfs_inode_cb inode_cb, int maxlen,
+    gfs_readdir_cb readdir_cb, gfs_lookup_cb lookup_cb)
+{
+	vnode_t *vp;
+	gfs_dir_t *dp;
+	gfs_dirent_t *de;
+
+	vp = gfs_file_create(struct_size, pvp, ops);
+	vp->v_type = VDIR;
+
+	dp = vp->v_data;
+	dp->gfsd_file.gfs_type = GFS_DIR;
+	dp->gfsd_maxlen = maxlen;
+
+	if (entries != NULL) {
+		for (de = entries; de->gfse_name != NULL; de++)
+			dp->gfsd_nstatic++;
+
+		dp->gfsd_static = kmem_alloc(
+		    dp->gfsd_nstatic * sizeof (gfs_dirent_t), KM_SLEEP);
+		bcopy(entries, dp->gfsd_static,
+		    dp->gfsd_nstatic * sizeof (gfs_dirent_t));
+	}
+
+	dp->gfsd_readdir = readdir_cb;
+	dp->gfsd_lookup = lookup_cb;
+	dp->gfsd_inode = inode_cb;
+
+	mutex_init(&dp->gfsd_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	return (vp);
+}
+
+/*
+ * gfs_root_create(): create a root vnode for a GFS filesystem
+ *
+ * Similar to gfs_dir_create(), this creates a root vnode for a filesystem.  The
+ * only difference is that it takes a vfs_t instead of a vnode_t as its parent.
+ */
+vnode_t *
+gfs_root_create(size_t size, vfs_t *vfsp, vnodeops_t *ops, ino64_t ino,
+    gfs_dirent_t *entries, gfs_inode_cb inode_cb, int maxlen,
+    gfs_readdir_cb readdir_cb, gfs_lookup_cb lookup_cb)
+{
+	vnode_t *vp = gfs_dir_create(size, NULL, ops, entries, inode_cb,
+	    maxlen, readdir_cb, lookup_cb);
+
+	/* Manually set the inode */
+	((gfs_file_t *)vp->v_data)->gfs_ino = ino;
+
+	VFS_HOLD(vfsp);
+	VN_SET_VFS_TYPE_DEV(vp, vfsp, VDIR, 0);
+	vp->v_flag |= VROOT | VNOCACHE | VNOMAP | VNOSWAP | VNOMOUNT;
+
+	return (vp);
+}
+
+/*
+ * gfs_root_create_file(): create a root vnode for a GFS file as a filesystem
+ *
+ * Similar to gfs_root_create(), this creates a root vnode for a file to
+ * be the pseudo-filesystem.
+ */
+vnode_t *
+gfs_root_create_file(size_t size, vfs_t *vfsp, vnodeops_t *ops, ino64_t ino)
+{
+	vnode_t	*vp = gfs_file_create(size, NULL, ops);
+
+	((gfs_file_t *)vp->v_data)->gfs_ino = ino;
+
+	VFS_HOLD(vfsp);
+	VN_SET_VFS_TYPE_DEV(vp, vfsp, VREG, 0);
+	vp->v_flag |= VROOT | VNOCACHE | VNOMAP | VNOSWAP | VNOMOUNT;
+
+	return (vp);
+}
+
+/*
+ * gfs_file_inactive()
+ *
+ * Called from the VOP_INACTIVE() routine.  If necessary, this routine will
+ * remove the given vnode from the parent directory and clean up any references
+ * in the VFS layer.
+ *
+ * If the vnode was not removed (due to a race with vget), then NULL is
+ * returned.  Otherwise, a pointer to the private data is returned.
+ */
+void *
+gfs_file_inactive(vnode_t *vp)
+{
+	int i;
+	gfs_dirent_t *ge = NULL;
+	gfs_file_t *fp = vp->v_data;
+	gfs_dir_t *dp = NULL;
+	void *data;
+
+	if (fp->gfs_parent == NULL || (vp->v_flag & V_XATTRDIR))
+		goto found;
+
+	dp = fp->gfs_parent->v_data;
+
+	/*
+	 * First, see if this vnode is cached in the parent.
+	 */
+	gfs_dir_lock(dp);
+
+	/*
+	 * Find it in the set of static entries.
+	 */
+	for (i = 0; i < dp->gfsd_nstatic; i++)  {
+		ge = &dp->gfsd_static[i];
+
+		if (ge->gfse_vnode == vp)
+			goto found;
+	}
+
+	/*
+	 * If 'ge' is NULL, then it is a dynamic entry.
+	 */
+	ge = NULL;
+
+found:
+	if (vp->v_flag & V_XATTRDIR) {
+		mutex_enter(&fp->gfs_parent->v_lock);
+	}
+	mutex_enter(&vp->v_lock);
+	if (vp->v_count == 1) {
+		/*
+		 * Really remove this vnode
+		 */
+		data = vp->v_data;
+		if (ge != NULL) {
+			/*
+			 * If this was a statically cached entry, simply set the
+			 * cached vnode to NULL.
+			 */
+			ge->gfse_vnode = NULL;
+		}
+		if (vp->v_flag & V_XATTRDIR) {
+			fp->gfs_parent->v_xattrdir = NULL;
+			mutex_exit(&fp->gfs_parent->v_lock);
+		}
+		mutex_exit(&vp->v_lock);
+
+		/*
+		 * Free vnode and release parent
+		 */
+		if (fp->gfs_parent) {
+			if (dp) {
+				gfs_dir_unlock(dp);
+			}
+			VN_RELE(fp->gfs_parent);
+		} else {
+			ASSERT(vp->v_vfsp != NULL);
+			VFS_RELE(vp->v_vfsp);
+		}
+		vn_free(vp);
+	} else {
+		vp->v_count--;
+		data = NULL;
+		mutex_exit(&vp->v_lock);
+		if (vp->v_flag & V_XATTRDIR) {
+			mutex_exit(&fp->gfs_parent->v_lock);
+		}
+		if (dp)
+			gfs_dir_unlock(dp);
+	}
+
+	return (data);
+}
+
+/*
+ * gfs_dir_inactive()
+ *
+ * Same as above, but for directories.
+ */
+void *
+gfs_dir_inactive(vnode_t *vp)
+{
+	gfs_dir_t *dp;
+
+	ASSERT(vp->v_type == VDIR);
+
+	if ((dp = gfs_file_inactive(vp)) != NULL) {
+		mutex_destroy(&dp->gfsd_lock);
+		if (dp->gfsd_nstatic)
+			kmem_free(dp->gfsd_static,
+			    dp->gfsd_nstatic * sizeof (gfs_dirent_t));
+	}
+
+	return (dp);
+}
+
+/*
+ * gfs_dir_lookup_dynamic()
+ *
+ * This routine looks up the provided name amongst the dynamic entries
+ * in the gfs directory and returns the corresponding vnode, if found.
+ *
+ * The gfs directory is expected to be locked by the caller prior to
+ * calling this function.  The directory will be unlocked during the
+ * execution of this function, but will be locked upon return from the
+ * function.  This function returns 0 on success, non-zero on error.
+ *
+ * The dynamic lookups are performed by invoking the lookup
+ * callback, which is passed to this function as the first argument.
+ * The arguments to the callback are:
+ *
+ * int gfs_lookup_cb(vnode_t *pvp, const char *nm, vnode_t **vpp, cred_t *cr,
+ *     int flags, int *deflgs, pathname_t *rpnp);
+ *
+ *	pvp	- parent vnode
+ *	nm	- name of entry
+ *	vpp	- pointer to resulting vnode
+ *	cr	- pointer to cred
+ *	flags	- flags value from lookup request
+ *		ignored here; currently only used to request
+ *		insensitive lookups
+ *	direntflgs - output parameter, directory entry flags
+ *		ignored here; currently only used to indicate a lookup
+ *		has more than one possible match when case is not considered
+ *	realpnp	- output parameter, real pathname
+ *		ignored here; when lookup was performed case-insensitively,
+ *		this field contains the "real" name of the file.
+ *
+ * 	Returns 0 on success, non-zero on error.
+ */
+static int
+gfs_dir_lookup_dynamic(gfs_lookup_cb callback, gfs_dir_t *dp,
+    const char *nm, vnode_t *dvp, vnode_t **vpp, cred_t *cr, int flags,
+    int *direntflags, pathname_t *realpnp)
+{
+	gfs_file_t *fp;
+	ino64_t ino;
+	int ret;
+
+	ASSERT(GFS_DIR_LOCKED(dp));
+
+	/*
+	 * Drop the directory lock, as the lookup routine
+	 * will need to allocate memory, or otherwise deadlock on this
+	 * directory.
+	 */
+	gfs_dir_unlock(dp);
+	ret = callback(dvp, nm, vpp, &ino, cr, flags, direntflags, realpnp);
+	gfs_dir_lock(dp);
+
+	/*
+	 * The callback for extended attributes returns a vnode
+	 * with v_data from an underlying fs.
+	 */
+	if (ret == 0 && !IS_XATTRDIR(dvp)) {
+		fp = (gfs_file_t *)((*vpp)->v_data);
+		fp->gfs_index = -1;
+		fp->gfs_ino = ino;
+	}
+
+	return (ret);
+}
+
+/*
+ * gfs_dir_lookup_static()
+ *
+ * This routine looks up the provided name amongst the static entries
+ * in the gfs directory and returns the corresponding vnode, if found.
+ * The first argument to the function is a pointer to the comparison
+ * function this function should use to decide if names are a match.
+ *
+ * If a match is found, and GFS_CACHE_VNODE is set and the vnode
+ * exists, we simply return the existing vnode.  Otherwise, we call
+ * the static entry's callback routine, caching the result if
+ * necessary.  If the idx pointer argument is non-NULL, we use it to
+ * return the index of the matching static entry.
+ *
+ * The gfs directory is expected to be locked by the caller prior to calling
+ * this function.  The directory may be unlocked during the execution of
+ * this function, but will be locked upon return from the function.
+ *
+ * This function returns 0 if a match is found, ENOENT if not.
+ */
+static int
+gfs_dir_lookup_static(int (*compare)(const char *, const char *),
+    gfs_dir_t *dp, const char *nm, vnode_t *dvp, int *idx,
+    vnode_t **vpp, pathname_t *rpnp)
+{
+	gfs_dirent_t *ge;
+	vnode_t *vp = NULL;
+	int i;
+
+	ASSERT(GFS_DIR_LOCKED(dp));
+
+	/*
+	 * Search static entries.
+	 */
+	for (i = 0; i < dp->gfsd_nstatic; i++) {
+		ge = &dp->gfsd_static[i];
+
+		if (compare(ge->gfse_name, nm) == 0) {
+			if (rpnp)
+				(void) strlcpy(rpnp->pn_buf, ge->gfse_name,
+				    rpnp->pn_bufsize);
+
+			if (ge->gfse_vnode) {
+				ASSERT(ge->gfse_flags & GFS_CACHE_VNODE);
+				vp = ge->gfse_vnode;
+				VN_HOLD(vp);
+				break;
+			}
+
+			/*
+			 * We drop the directory lock, as the constructor will
+			 * need to do KM_SLEEP allocations.  If we return from
+			 * the constructor only to find that a parallel
+			 * operation has completed, and GFS_CACHE_VNODE is set
+			 * for this entry, we discard the result in favor of
+			 * the cached vnode.
+			 */
+			gfs_dir_unlock(dp);
+			vp = ge->gfse_ctor(dvp);
+			gfs_dir_lock(dp);
+
+			((gfs_file_t *)vp->v_data)->gfs_index = i;
+
+			/* Set the inode according to the callback. */
+			((gfs_file_t *)vp->v_data)->gfs_ino =
+			    dp->gfsd_inode(dvp, i);
+
+			if (ge->gfse_flags & GFS_CACHE_VNODE) {
+				if (ge->gfse_vnode == NULL) {
+					ge->gfse_vnode = vp;
+				} else {
+					/*
+					 * A parallel constructor beat us to it;
+					 * return existing vnode.  We have to be
+					 * careful because we can't release the
+					 * current vnode while holding the
+					 * directory lock; its inactive routine
+					 * will try to lock this directory.
+					 */
+					vnode_t *oldvp = vp;
+					vp = ge->gfse_vnode;
+					VN_HOLD(vp);
+
+					gfs_dir_unlock(dp);
+					VN_RELE(oldvp);
+					gfs_dir_lock(dp);
+				}
+			}
+			break;
+		}
+	}
+
+	if (vp == NULL)
+		return (ENOENT);
+	else if (idx)
+		*idx = i;
+	*vpp = vp;
+	return (0);
+}
+
+/*
+ * gfs_dir_lookup()
+ *
+ * Looks up the given name in the directory and returns the corresponding
+ * vnode, if found.
+ *
+ * First, we search statically defined entries, if any, with a call to
+ * gfs_dir_lookup_static().  If no static entry is found, and we have
+ * a callback function we try a dynamic lookup via gfs_dir_lookup_dynamic().
+ *
+ * This function returns 0 on success, non-zero on error.
+ */
+int
+gfs_dir_lookup(vnode_t *dvp, const char *nm, vnode_t **vpp, cred_t *cr,
+    int flags, int *direntflags, pathname_t *realpnp)
+{
+	gfs_dir_t *dp = dvp->v_data;
+	boolean_t casecheck;
+	vnode_t *dynvp = NULL;
+	vnode_t *vp = NULL;
+	int (*compare)(const char *, const char *);
+	int error, idx;
+
+	ASSERT(dvp->v_type == VDIR);
+
+	if (gfs_lookup_dot(vpp, dvp, dp->gfsd_file.gfs_parent, nm) == 0)
+		return (0);
+
+	casecheck = (flags & FIGNORECASE) != 0 && direntflags != NULL;
+	if (vfs_has_feature(dvp->v_vfsp, VFSFT_NOCASESENSITIVE) ||
+	    (flags & FIGNORECASE))
+		compare = strcasecmp;
+	else
+		compare = strcmp;
+
+	gfs_dir_lock(dp);
+
+	error = gfs_dir_lookup_static(compare, dp, nm, dvp, &idx, &vp, realpnp);
+
+	if (vp && casecheck) {
+		gfs_dirent_t *ge;
+		int i;
+
+		for (i = idx + 1; i < dp->gfsd_nstatic; i++) {
+			ge = &dp->gfsd_static[i];
+
+			if (strcasecmp(ge->gfse_name, nm) == 0) {
+				*direntflags |= ED_CASE_CONFLICT;
+				goto out;
+			}
+		}
+	}
+
+	if ((error || casecheck) && dp->gfsd_lookup)
+		error = gfs_dir_lookup_dynamic(dp->gfsd_lookup, dp, nm, dvp,
+		    &dynvp, cr, flags, direntflags, vp ? NULL : realpnp);
+
+	if (vp && dynvp) {
+		/* static and dynamic entries are case-insensitive conflict */
+		ASSERT(casecheck);
+		*direntflags |= ED_CASE_CONFLICT;
+		VN_RELE(dynvp);
+	} else if (vp == NULL) {
+		vp = dynvp;
+	} else if (error == ENOENT) {
+		error = 0;
+	} else if (error) {
+		VN_RELE(vp);
+		vp = NULL;
+	}
+
+out:
+	gfs_dir_unlock(dp);
+
+	*vpp = vp;
+	return (error);
+}
+
+/*
+ * gfs_dir_readdir: does a readdir() on the given directory
+ *
+ *    dvp	- directory vnode
+ *    uiop	- uio structure
+ *    eofp	- eof pointer
+ *    data	- arbitrary data passed to readdir callback
+ *
+ * This routine does all the readdir() dirty work.  Even so, the caller must
+ * supply two callbacks in order to get full compatibility.
+ *
+ * If the directory contains static entries, an inode callback must be
+ * specified.  This avoids having to create every vnode and call VOP_GETATTR()
+ * when reading the directory.  This function has the following arguments:
+ *
+ *	ino_t gfs_inode_cb(vnode_t *vp, int index);
+ *
+ * 	vp	- vnode for the directory
+ * 	index	- index in original gfs_dirent_t array
+ *
+ * 	Returns the inode number for the given entry.
+ *
+ * For directories with dynamic entries, a readdir callback must be provided.
+ * This is significantly more complex, thanks to the particulars of
+ * VOP_READDIR().
+ *
+ *	int gfs_readdir_cb(vnode_t *vp, void *dp, int *eofp,
+ *	    offset_t *off, offset_t *nextoff, void *data, int flags)
+ *
+ *	vp	- directory vnode
+ *	dp	- directory entry, sized according to maxlen given to
+ *		  gfs_dir_create().  callback must fill in d_name and
+ *		  d_ino (if a dirent64_t), or ed_name, ed_ino, and ed_eflags
+ *		  (if an edirent_t). edirent_t is used if V_RDDIR_ENTFLAGS
+ *		  is set in 'flags'.
+ *	eofp	- callback must set to 1 when EOF has been reached
+ *	off	- on entry, the last offset read from the directory.  Callback
+ *		  must set to the offset of the current entry, typically left
+ *		  untouched.
+ *	nextoff	- callback must set to offset of next entry.  Typically
+ *		  (off + 1)
+ *	data	- caller-supplied data
+ *	flags	- VOP_READDIR flags
+ *
+ *	Return 0 on success, or error on failure.
+ */
+int
+gfs_dir_readdir(vnode_t *dvp, uio_t *uiop, int *eofp, void *data, cred_t *cr,
+    caller_context_t *ct, int flags)
+{
+	gfs_readdir_state_t gstate;
+	int error, eof = 0;
+	ino64_t ino, pino;
+	offset_t off, next;
+	gfs_dir_t *dp = dvp->v_data;
+
+	error = gfs_get_parent_ino(dvp, cr, ct, &pino, &ino);
+	if (error)
+		return (error);
+
+	if ((error = gfs_readdir_init(&gstate, dp->gfsd_maxlen, 1, uiop,
+	    pino, ino, flags)) != 0)
+		return (error);
+
+	while ((error = gfs_readdir_pred(&gstate, uiop, &off)) == 0 &&
+	    !eof) {
+
+		if (off >= 0 && off < dp->gfsd_nstatic) {
+			ino = dp->gfsd_inode(dvp, off);
+
+			if ((error = gfs_readdir_emit(&gstate, uiop,
+			    off, ino, dp->gfsd_static[off].gfse_name, 0))
+			    != 0)
+				break;
+
+		} else if (dp->gfsd_readdir) {
+			off -= dp->gfsd_nstatic;
+
+			if ((error = dp->gfsd_readdir(dvp,
+			    gstate.grd_dirent, &eof, &off, &next,
+			    data, flags)) != 0 || eof)
+				break;
+
+			off += dp->gfsd_nstatic + 2;
+			next += dp->gfsd_nstatic + 2;
+
+			if ((error = gfs_readdir_emit_int(&gstate, uiop,
+			    next)) != 0)
+				break;
+		} else {
+			/*
+			 * Offset is beyond the end of the static entries, and
+			 * we have no dynamic entries.  Set EOF.
+			 */
+			eof = 1;
+		}
+	}
+
+	return (gfs_readdir_fini(&gstate, error, eofp, eof));
+}
+
+
+/*
+ * gfs_vop_lookup: VOP_LOOKUP() entry point
+ *
+ * For use directly in vnode ops table.  Given a GFS directory, calls
+ * gfs_dir_lookup() as necessary.
+ */
+/* ARGSUSED */
+int
+gfs_vop_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
+    int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct,
+    int *direntflags, pathname_t *realpnp)
+{
+	return (gfs_dir_lookup(dvp, nm, vpp, cr, flags, direntflags, realpnp));
+}
+
+/*
+ * gfs_vop_readdir: VOP_READDIR() entry point
+ *
+ * For use directly in vnode ops table.  Given a GFS directory, calls
+ * gfs_dir_readdir() as necessary.
+ */
+/* ARGSUSED */
+int
+gfs_vop_readdir(vnode_t *vp, uio_t *uiop, cred_t *cr, int *eofp,
+    caller_context_t *ct, int flags)
+{
+	return (gfs_dir_readdir(vp, uiop, eofp, NULL, cr, ct, flags));
+}
+
+
+/*
+ * gfs_vop_map: VOP_MAP() entry point
+ *
+ * Convenient routine for handling pseudo-files that wish to allow mmap() calls.
+ * This function only works for readonly files, and uses the read function for
+ * the vnode to fill in the data.  The mapped data is immediately faulted in and
+ * filled with the necessary data during this call; there are no getpage() or
+ * putpage() routines.
+ */
+/* ARGSUSED */
+int
+gfs_vop_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp,
+    size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cred,
+    caller_context_t *ct)
+{
+	int rv;
+	ssize_t resid = len;
+
+	/*
+	 * Check for bad parameters
+	 */
+#ifdef _ILP32
+	if (len > MAXOFF_T)
+		return (ENOMEM);
+#endif
+	if (vp->v_flag & VNOMAP)
+		return (ENOTSUP);
+	if (off > MAXOFF_T)
+		return (EFBIG);
+	if ((long)off < 0 || (long)(off + len) < 0)
+		return (EINVAL);
+	if (vp->v_type != VREG)
+		return (ENODEV);
+	if ((prot & (PROT_EXEC | PROT_WRITE)) != 0)
+		return (EACCES);
+
+	/*
+	 * Find appropriate address if needed, otherwise clear address range.
+	 */
+	as_rangelock(as);
+	rv = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags);
+	if (rv != 0) {
+		as_rangeunlock(as);
+		return (rv);
+	}
+
+	/*
+	 * Create mapping
+	 */
+	rv = as_map(as, *addrp, len, segvn_create, zfod_argsp);
+	as_rangeunlock(as);
+	if (rv != 0)
+		return (rv);
+
+	/*
+	 * Fill with data from read()
+	 */
+	rv = vn_rdwr(UIO_READ, vp, *addrp, len, off, UIO_USERSPACE,
+	    0, (rlim64_t)0, cred, &resid);
+
+	if (rv == 0 && resid != 0)
+		rv = ENXIO;
+
+	if (rv != 0) {
+		as_rangelock(as);
+		(void) as_unmap(as, *addrp, len);
+		as_rangeunlock(as);
+	}
+
+	return (rv);
+}
+
+/*
+ * gfs_vop_inactive: VOP_INACTIVE() entry point
+ *
+ * Given a vnode that is a GFS file or directory, call gfs_file_inactive() or
+ * gfs_dir_inactive() as necessary, and kmem_free()s associated private data.
+ */
+/* ARGSUSED */
+void
+gfs_vop_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
+{
+	gfs_file_t *fp = vp->v_data;
+	void *data;
+
+	if (fp->gfs_type == GFS_DIR)
+		data = gfs_dir_inactive(vp);
+	else
+		data = gfs_file_inactive(vp);
+
+	if (data != NULL)
+		kmem_free(data, fp->gfs_size);
+}
diff --git a/uts/common/fs/vnode.c b/uts/common/fs/vnode.c
new file mode 100644
index 000000000000..382369c7fc72
--- /dev/null
+++ b/uts/common/fs/vnode.c
@@ -0,0 +1,4536 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+/*
+ * University Copyright- Copyright (c) 1982, 1986, 1988
+ * The Regents of the University of California
+ * All Rights Reserved
+ *
+ * University Acknowledgment- Portions of this document are derived from
+ * software developed by the University of California, Berkeley, and its
+ * contributors.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/t_lock.h>
+#include <sys/errno.h>
+#include <sys/cred.h>
+#include <sys/user.h>
+#include <sys/uio.h>
+#include <sys/file.h>
+#include <sys/pathname.h>
+#include <sys/vfs.h>
+#include <sys/vfs_opreg.h>
+#include <sys/vnode.h>
+#include <sys/rwstlock.h>
+#include <sys/fem.h>
+#include <sys/stat.h>
+#include <sys/mode.h>
+#include <sys/conf.h>
+#include <sys/sysmacros.h>
+#include <sys/cmn_err.h>
+#include <sys/systm.h>
+#include <sys/kmem.h>
+#include <sys/debug.h>
+#include <c2/audit.h>
+#include <sys/acl.h>
+#include <sys/nbmlock.h>
+#include <sys/fcntl.h>
+#include <fs/fs_subr.h>
+#include <sys/taskq.h>
+#include <fs/fs_reparse.h>
+
+/* Determine if this vnode is a file that is read-only */
+#define	ISROFILE(vp)	\
+	((vp)->v_type != VCHR && (vp)->v_type != VBLK && \
+	    (vp)->v_type != VFIFO && vn_is_readonly(vp))
+
+/* Tunable via /etc/system; used only by admin/install */
+int nfs_global_client_only;
+
+/*
+ * Array of vopstats_t for per-FS-type vopstats.  This array has the same
+ * number of entries as and parallel to the vfssw table.  (Arguably, it could
+ * be part of the vfssw table.)  Once it's initialized, it's accessed using
+ * the same fstype index that is used to index into the vfssw table.
+ */
+vopstats_t **vopstats_fstype;
+
+/* vopstats initialization template used for fast initialization via bcopy() */
+static vopstats_t *vs_templatep;
+
+/* Kmem cache handle for vsk_anchor_t allocations */
+kmem_cache_t *vsk_anchor_cache;
+
+/* file events cleanup routine */
+extern void free_fopdata(vnode_t *);
+
+/*
+ * Root of AVL tree for the kstats associated with vopstats.  Lock protects
+ * updates to vsktat_tree.
+ */
+avl_tree_t	vskstat_tree;
+kmutex_t	vskstat_tree_lock;
+
+/* Global variable which enables/disables the vopstats collection */
+int vopstats_enabled = 1;
+
+/*
+ * forward declarations for internal vnode specific data (vsd)
+ */
+static void *vsd_realloc(void *, size_t, size_t);
+
+/*
+ * forward declarations for reparse point functions
+ */
+static int fs_reparse_mark(char *target, vattr_t *vap, xvattr_t *xvattr);
+
+/*
+ * VSD -- VNODE SPECIFIC DATA
+ * The v_data pointer is typically used by a file system to store a
+ * pointer to the file system's private node (e.g. ufs inode, nfs rnode).
+ * However, there are times when additional project private data needs
+ * to be stored separately from the data (node) pointed to by v_data.
+ * This additional data could be stored by the file system itself or
+ * by a completely different kernel entity.  VSD provides a way for
+ * callers to obtain a key and store a pointer to private data associated
+ * with a vnode.
+ *
+ * Callers are responsible for protecting the vsd by holding v_vsd_lock
+ * for calls to vsd_set() and vsd_get().
+ */
+
+/*
+ * vsd_lock protects:
+ *   vsd_nkeys - creation and deletion of vsd keys
+ *   vsd_list - insertion and deletion of vsd_node in the vsd_list
+ *   vsd_destructor - adding and removing destructors to the list
+ */
+static kmutex_t		vsd_lock;
+static uint_t		vsd_nkeys;	 /* size of destructor array */
+/* list of vsd_node's */
+static list_t *vsd_list = NULL;
+/* per-key destructor funcs */
+static void 		(**vsd_destructor)(void *);
+
+/*
+ * The following is the common set of actions needed to update the
+ * vopstats structure from a vnode op.  Both VOPSTATS_UPDATE() and
+ * VOPSTATS_UPDATE_IO() do almost the same thing, except for the
+ * recording of the bytes transferred.  Since the code is similar
+ * but small, it is nearly a duplicate.  Consequently any changes
+ * to one may need to be reflected in the other.
+ * Rundown of the variables:
+ * vp - Pointer to the vnode
+ * counter - Partial name structure member to update in vopstats for counts
+ * bytecounter - Partial name structure member to update in vopstats for bytes
+ * bytesval - Value to update in vopstats for bytes
+ * fstype - Index into vsanchor_fstype[], same as index into vfssw[]
+ * vsp - Pointer to vopstats structure (either in vfs or vsanchor_fstype[i])
+ */
+
+#define	VOPSTATS_UPDATE(vp, counter) {					\
+	vfs_t *vfsp = (vp)->v_vfsp;					\
+	if (vfsp && vfsp->vfs_implp &&					\
+	    (vfsp->vfs_flag & VFS_STATS) && (vp)->v_type != VBAD) {	\
+		vopstats_t *vsp = &vfsp->vfs_vopstats;			\
+		uint64_t *stataddr = &(vsp->n##counter.value.ui64);	\
+		extern void __dtrace_probe___fsinfo_##counter(vnode_t *, \
+		    size_t, uint64_t *);				\
+		__dtrace_probe___fsinfo_##counter(vp, 0, stataddr);	\
+		(*stataddr)++;						\
+		if ((vsp = vfsp->vfs_fstypevsp) != NULL) {		\
+			vsp->n##counter.value.ui64++;			\
+		}							\
+	}								\
+}
+
+#define	VOPSTATS_UPDATE_IO(vp, counter, bytecounter, bytesval) {	\
+	vfs_t *vfsp = (vp)->v_vfsp;					\
+	if (vfsp && vfsp->vfs_implp &&					\
+	    (vfsp->vfs_flag & VFS_STATS) && (vp)->v_type != VBAD) {	\
+		vopstats_t *vsp = &vfsp->vfs_vopstats;			\
+		uint64_t *stataddr = &(vsp->n##counter.value.ui64);	\
+		extern void __dtrace_probe___fsinfo_##counter(vnode_t *, \
+		    size_t, uint64_t *);				\
+		__dtrace_probe___fsinfo_##counter(vp, bytesval, stataddr); \
+		(*stataddr)++;						\
+		vsp->bytecounter.value.ui64 += bytesval;		\
+		if ((vsp = vfsp->vfs_fstypevsp) != NULL) {		\
+			vsp->n##counter.value.ui64++;			\
+			vsp->bytecounter.value.ui64 += bytesval;	\
+		}							\
+	}								\
+}
+
+/*
+ * If the filesystem does not support XIDs map credential
+ * If the vfsp is NULL, perhaps we should also map?
+ */
+#define	VOPXID_MAP_CR(vp, cr)	{					\
+	vfs_t *vfsp = (vp)->v_vfsp;					\
+	if (vfsp != NULL && (vfsp->vfs_flag & VFS_XID) == 0)		\
+		cr = crgetmapped(cr);					\
+	}
+
+/*
+ * Convert stat(2) formats to vnode types and vice versa.  (Knows about
+ * numerical order of S_IFMT and vnode types.)
+ */
+enum vtype iftovt_tab[] = {
+	VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON,
+	VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VNON
+};
+
+ushort_t vttoif_tab[] = {
+	0, S_IFREG, S_IFDIR, S_IFBLK, S_IFCHR, S_IFLNK, S_IFIFO,
+	S_IFDOOR, 0, S_IFSOCK, S_IFPORT, 0
+};
+
+/*
+ * The system vnode cache.
+ */
+
+kmem_cache_t *vn_cache;
+
+
+/*
+ * Vnode operations vector.
+ */
+
+static const fs_operation_trans_def_t vn_ops_table[] = {
+	VOPNAME_OPEN, offsetof(struct vnodeops, vop_open),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_CLOSE, offsetof(struct vnodeops, vop_close),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_READ, offsetof(struct vnodeops, vop_read),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_WRITE, offsetof(struct vnodeops, vop_write),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_IOCTL, offsetof(struct vnodeops, vop_ioctl),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_SETFL, offsetof(struct vnodeops, vop_setfl),
+	    fs_setfl, fs_nosys,
+
+	VOPNAME_GETATTR, offsetof(struct vnodeops, vop_getattr),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_SETATTR, offsetof(struct vnodeops, vop_setattr),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_ACCESS, offsetof(struct vnodeops, vop_access),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_LOOKUP, offsetof(struct vnodeops, vop_lookup),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_CREATE, offsetof(struct vnodeops, vop_create),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_REMOVE, offsetof(struct vnodeops, vop_remove),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_LINK, offsetof(struct vnodeops, vop_link),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_RENAME, offsetof(struct vnodeops, vop_rename),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_MKDIR, offsetof(struct vnodeops, vop_mkdir),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_RMDIR, offsetof(struct vnodeops, vop_rmdir),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_READDIR, offsetof(struct vnodeops, vop_readdir),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_SYMLINK, offsetof(struct vnodeops, vop_symlink),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_READLINK, offsetof(struct vnodeops, vop_readlink),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_FSYNC, offsetof(struct vnodeops, vop_fsync),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_INACTIVE, offsetof(struct vnodeops, vop_inactive),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_FID, offsetof(struct vnodeops, vop_fid),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_RWLOCK, offsetof(struct vnodeops, vop_rwlock),
+	    fs_rwlock, fs_rwlock,
+
+	VOPNAME_RWUNLOCK, offsetof(struct vnodeops, vop_rwunlock),
+	    (fs_generic_func_p) fs_rwunlock,
+	    (fs_generic_func_p) fs_rwunlock,	/* no errors allowed */
+
+	VOPNAME_SEEK, offsetof(struct vnodeops, vop_seek),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_CMP, offsetof(struct vnodeops, vop_cmp),
+	    fs_cmp, fs_cmp,		/* no errors allowed */
+
+	VOPNAME_FRLOCK, offsetof(struct vnodeops, vop_frlock),
+	    fs_frlock, fs_nosys,
+
+	VOPNAME_SPACE, offsetof(struct vnodeops, vop_space),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_REALVP, offsetof(struct vnodeops, vop_realvp),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_GETPAGE, offsetof(struct vnodeops, vop_getpage),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_PUTPAGE, offsetof(struct vnodeops, vop_putpage),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_MAP, offsetof(struct vnodeops, vop_map),
+	    (fs_generic_func_p) fs_nosys_map,
+	    (fs_generic_func_p) fs_nosys_map,
+
+	VOPNAME_ADDMAP, offsetof(struct vnodeops, vop_addmap),
+	    (fs_generic_func_p) fs_nosys_addmap,
+	    (fs_generic_func_p) fs_nosys_addmap,
+
+	VOPNAME_DELMAP, offsetof(struct vnodeops, vop_delmap),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_POLL, offsetof(struct vnodeops, vop_poll),
+	    (fs_generic_func_p) fs_poll, (fs_generic_func_p) fs_nosys_poll,
+
+	VOPNAME_DUMP, offsetof(struct vnodeops, vop_dump),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_PATHCONF, offsetof(struct vnodeops, vop_pathconf),
+	    fs_pathconf, fs_nosys,
+
+	VOPNAME_PAGEIO, offsetof(struct vnodeops, vop_pageio),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_DUMPCTL, offsetof(struct vnodeops, vop_dumpctl),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_DISPOSE, offsetof(struct vnodeops, vop_dispose),
+	    (fs_generic_func_p) fs_dispose,
+	    (fs_generic_func_p) fs_nodispose,
+
+	VOPNAME_SETSECATTR, offsetof(struct vnodeops, vop_setsecattr),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_GETSECATTR, offsetof(struct vnodeops, vop_getsecattr),
+	    fs_fab_acl, fs_nosys,
+
+	VOPNAME_SHRLOCK, offsetof(struct vnodeops, vop_shrlock),
+	    fs_shrlock, fs_nosys,
+
+	VOPNAME_VNEVENT, offsetof(struct vnodeops, vop_vnevent),
+	    (fs_generic_func_p) fs_vnevent_nosupport,
+	    (fs_generic_func_p) fs_vnevent_nosupport,
+
+	VOPNAME_REQZCBUF, offsetof(struct vnodeops, vop_reqzcbuf),
+	    fs_nosys, fs_nosys,
+
+	VOPNAME_RETZCBUF, offsetof(struct vnodeops, vop_retzcbuf),
+	    fs_nosys, fs_nosys,
+
+	NULL, 0, NULL, NULL
+};
+
+/* Extensible attribute (xva) routines. */
+
+/*
+ * Zero out the structure, set the size of the requested/returned bitmaps,
+ * set AT_XVATTR in the embedded vattr_t's va_mask, and set up the pointer
+ * to the returned attributes array.
+ */
+void
+xva_init(xvattr_t *xvap)
+{
+	bzero(xvap, sizeof (xvattr_t));
+	xvap->xva_mapsize = XVA_MAPSIZE;
+	xvap->xva_magic = XVA_MAGIC;
+	xvap->xva_vattr.va_mask = AT_XVATTR;
+	xvap->xva_rtnattrmapp = &(xvap->xva_rtnattrmap)[0];
+}
+
+/*
+ * If AT_XVATTR is set, returns a pointer to the embedded xoptattr_t
+ * structure.  Otherwise, returns NULL.
+ */
+xoptattr_t *
+xva_getxoptattr(xvattr_t *xvap)
+{
+	xoptattr_t *xoap = NULL;
+	if (xvap->xva_vattr.va_mask & AT_XVATTR)
+		xoap = &xvap->xva_xoptattrs;
+	return (xoap);
+}
+
+/*
+ * Used by the AVL routines to compare two vsk_anchor_t structures in the tree.
+ * We use the f_fsid reported by VFS_STATVFS() since we use that for the
+ * kstat name.
+ */
+static int
+vska_compar(const void *n1, const void *n2)
+{
+	int ret;
+	ulong_t p1 = ((vsk_anchor_t *)n1)->vsk_fsid;
+	ulong_t p2 = ((vsk_anchor_t *)n2)->vsk_fsid;
+
+	if (p1 < p2) {
+		ret = -1;
+	} else if (p1 > p2) {
+		ret = 1;
+	} else {
+		ret = 0;
+	}
+
+	return (ret);
+}
+
+/*
+ * Used to create a single template which will be bcopy()ed to a newly
+ * allocated vsanchor_combo_t structure in new_vsanchor(), below.
+ */
+static vopstats_t *
+create_vopstats_template()
+{
+	vopstats_t		*vsp;
+
+	vsp = kmem_alloc(sizeof (vopstats_t), KM_SLEEP);
+	bzero(vsp, sizeof (*vsp));	/* Start fresh */
+
+	/* VOP_OPEN */
+	kstat_named_init(&vsp->nopen, "nopen", KSTAT_DATA_UINT64);
+	/* VOP_CLOSE */
+	kstat_named_init(&vsp->nclose, "nclose", KSTAT_DATA_UINT64);
+	/* VOP_READ I/O */
+	kstat_named_init(&vsp->nread, "nread", KSTAT_DATA_UINT64);
+	kstat_named_init(&vsp->read_bytes, "read_bytes", KSTAT_DATA_UINT64);
+	/* VOP_WRITE I/O */
+	kstat_named_init(&vsp->nwrite, "nwrite", KSTAT_DATA_UINT64);
+	kstat_named_init(&vsp->write_bytes, "write_bytes", KSTAT_DATA_UINT64);
+	/* VOP_IOCTL */
+	kstat_named_init(&vsp->nioctl, "nioctl", KSTAT_DATA_UINT64);
+	/* VOP_SETFL */
+	kstat_named_init(&vsp->nsetfl, "nsetfl", KSTAT_DATA_UINT64);
+	/* VOP_GETATTR */
+	kstat_named_init(&vsp->ngetattr, "ngetattr", KSTAT_DATA_UINT64);
+	/* VOP_SETATTR */
+	kstat_named_init(&vsp->nsetattr, "nsetattr", KSTAT_DATA_UINT64);
+	/* VOP_ACCESS */
+	kstat_named_init(&vsp->naccess, "naccess", KSTAT_DATA_UINT64);
+	/* VOP_LOOKUP */
+	kstat_named_init(&vsp->nlookup, "nlookup", KSTAT_DATA_UINT64);
+	/* VOP_CREATE */
+	kstat_named_init(&vsp->ncreate, "ncreate", KSTAT_DATA_UINT64);
+	/* VOP_REMOVE */
+	kstat_named_init(&vsp->nremove, "nremove", KSTAT_DATA_UINT64);
+	/* VOP_LINK */
+	kstat_named_init(&vsp->nlink, "nlink", KSTAT_DATA_UINT64);
+	/* VOP_RENAME */
+	kstat_named_init(&vsp->nrename, "nrename", KSTAT_DATA_UINT64);
+	/* VOP_MKDIR */
+	kstat_named_init(&vsp->nmkdir, "nmkdir", KSTAT_DATA_UINT64);
+	/* VOP_RMDIR */
+	kstat_named_init(&vsp->nrmdir, "nrmdir", KSTAT_DATA_UINT64);
+	/* VOP_READDIR I/O */
+	kstat_named_init(&vsp->nreaddir, "nreaddir", KSTAT_DATA_UINT64);
+	kstat_named_init(&vsp->readdir_bytes, "readdir_bytes",
+	    KSTAT_DATA_UINT64);
+	/* VOP_SYMLINK */
+	kstat_named_init(&vsp->nsymlink, "nsymlink", KSTAT_DATA_UINT64);
+	/* VOP_READLINK */
+	kstat_named_init(&vsp->nreadlink, "nreadlink", KSTAT_DATA_UINT64);
+	/* VOP_FSYNC */
+	kstat_named_init(&vsp->nfsync, "nfsync", KSTAT_DATA_UINT64);
+	/* VOP_INACTIVE */
+	kstat_named_init(&vsp->ninactive, "ninactive", KSTAT_DATA_UINT64);
+	/* VOP_FID */
+	kstat_named_init(&vsp->nfid, "nfid", KSTAT_DATA_UINT64);
+	/* VOP_RWLOCK */
+	kstat_named_init(&vsp->nrwlock, "nrwlock", KSTAT_DATA_UINT64);
+	/* VOP_RWUNLOCK */
+	kstat_named_init(&vsp->nrwunlock, "nrwunlock", KSTAT_DATA_UINT64);
+	/* VOP_SEEK */
+	kstat_named_init(&vsp->nseek, "nseek", KSTAT_DATA_UINT64);
+	/* VOP_CMP */
+	kstat_named_init(&vsp->ncmp, "ncmp", KSTAT_DATA_UINT64);
+	/* VOP_FRLOCK */
+	kstat_named_init(&vsp->nfrlock, "nfrlock", KSTAT_DATA_UINT64);
+	/* VOP_SPACE */
+	kstat_named_init(&vsp->nspace, "nspace", KSTAT_DATA_UINT64);
+	/* VOP_REALVP */
+	kstat_named_init(&vsp->nrealvp, "nrealvp", KSTAT_DATA_UINT64);
+	/* VOP_GETPAGE */
+	kstat_named_init(&vsp->ngetpage, "ngetpage", KSTAT_DATA_UINT64);
+	/* VOP_PUTPAGE */
+	kstat_named_init(&vsp->nputpage, "nputpage", KSTAT_DATA_UINT64);
+	/* VOP_MAP */
+	kstat_named_init(&vsp->nmap, "nmap", KSTAT_DATA_UINT64);
+	/* VOP_ADDMAP */
+	kstat_named_init(&vsp->naddmap, "naddmap", KSTAT_DATA_UINT64);
+	/* VOP_DELMAP */
+	kstat_named_init(&vsp->ndelmap, "ndelmap", KSTAT_DATA_UINT64);
+	/* VOP_POLL */
+	kstat_named_init(&vsp->npoll, "npoll", KSTAT_DATA_UINT64);
+	/* VOP_DUMP */
+	kstat_named_init(&vsp->ndump, "ndump", KSTAT_DATA_UINT64);
+	/* VOP_PATHCONF */
+	kstat_named_init(&vsp->npathconf, "npathconf", KSTAT_DATA_UINT64);
+	/* VOP_PAGEIO */
+	kstat_named_init(&vsp->npageio, "npageio", KSTAT_DATA_UINT64);
+	/* VOP_DUMPCTL */
+	kstat_named_init(&vsp->ndumpctl, "ndumpctl", KSTAT_DATA_UINT64);
+	/* VOP_DISPOSE */
+	kstat_named_init(&vsp->ndispose, "ndispose", KSTAT_DATA_UINT64);
+	/* VOP_SETSECATTR */
+	kstat_named_init(&vsp->nsetsecattr, "nsetsecattr", KSTAT_DATA_UINT64);
+	/* VOP_GETSECATTR */
+	kstat_named_init(&vsp->ngetsecattr, "ngetsecattr", KSTAT_DATA_UINT64);
+	/* VOP_SHRLOCK */
+	kstat_named_init(&vsp->nshrlock, "nshrlock", KSTAT_DATA_UINT64);
+	/* VOP_VNEVENT */
+	kstat_named_init(&vsp->nvnevent, "nvnevent", KSTAT_DATA_UINT64);
+	/* VOP_REQZCBUF */
+	kstat_named_init(&vsp->nreqzcbuf, "nreqzcbuf", KSTAT_DATA_UINT64);
+	/* VOP_RETZCBUF */
+	kstat_named_init(&vsp->nretzcbuf, "nretzcbuf", KSTAT_DATA_UINT64);
+
+	return (vsp);
+}
+
+/*
+ * Creates a kstat structure associated with a vopstats structure.
+ */
+kstat_t *
+new_vskstat(char *ksname, vopstats_t *vsp)
+{
+	kstat_t		*ksp;
+
+	if (!vopstats_enabled) {
+		return (NULL);
+	}
+
+	ksp = kstat_create("unix", 0, ksname, "misc", KSTAT_TYPE_NAMED,
+	    sizeof (vopstats_t)/sizeof (kstat_named_t),
+	    KSTAT_FLAG_VIRTUAL|KSTAT_FLAG_WRITABLE);
+	if (ksp) {
+		ksp->ks_data = vsp;
+		kstat_install(ksp);
+	}
+
+	return (ksp);
+}
+
+/*
+ * Called from vfsinit() to initialize the support mechanisms for vopstats
+ */
+void
+vopstats_startup()
+{
+	if (!vopstats_enabled)
+		return;
+
+	/*
+	 * Creates the AVL tree which holds per-vfs vopstat anchors.  This
+	 * is necessary since we need to check if a kstat exists before we
+	 * attempt to create it.  Also, initialize its lock.
+	 */
+	avl_create(&vskstat_tree, vska_compar, sizeof (vsk_anchor_t),
+	    offsetof(vsk_anchor_t, vsk_node));
+	mutex_init(&vskstat_tree_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	vsk_anchor_cache = kmem_cache_create("vsk_anchor_cache",
+	    sizeof (vsk_anchor_t), sizeof (uintptr_t), NULL, NULL, NULL,
+	    NULL, NULL, 0);
+
+	/*
+	 * Set up the array of pointers for the vopstats-by-FS-type.
+	 * The entries will be allocated/initialized as each file system
+	 * goes through modload/mod_installfs.
+	 */
+	vopstats_fstype = (vopstats_t **)kmem_zalloc(
+	    (sizeof (vopstats_t *) * nfstype), KM_SLEEP);
+
+	/* Set up the global vopstats initialization template */
+	vs_templatep = create_vopstats_template();
+}
+
+/*
+ * We need to have the all of the counters zeroed.
+ * The initialization of the vopstats_t includes on the order of
+ * 50 calls to kstat_named_init().  Rather that do that on every call,
+ * we do it once in a template (vs_templatep) then bcopy it over.
+ */
+void
+initialize_vopstats(vopstats_t *vsp)
+{
+	if (vsp == NULL)
+		return;
+
+	bcopy(vs_templatep, vsp, sizeof (vopstats_t));
+}
+
+/*
+ * If possible, determine which vopstats by fstype to use and
+ * return a pointer to the caller.
+ */
+vopstats_t *
+get_fstype_vopstats(vfs_t *vfsp, struct vfssw *vswp)
+{
+	int		fstype = 0;	/* Index into vfssw[] */
+	vopstats_t	*vsp = NULL;
+
+	if (vfsp == NULL || (vfsp->vfs_flag & VFS_STATS) == 0 ||
+	    !vopstats_enabled)
+		return (NULL);
+	/*
+	 * Set up the fstype.  We go to so much trouble because all versions
+	 * of NFS use the same fstype in their vfs even though they have
+	 * distinct entries in the vfssw[] table.
+	 * NOTE: A special vfs (e.g., EIO_vfs) may not have an entry.
+	 */
+	if (vswp) {
+		fstype = vswp - vfssw;	/* Gets us the index */
+	} else {
+		fstype = vfsp->vfs_fstype;
+	}
+
+	/*
+	 * Point to the per-fstype vopstats. The only valid values are
+	 * non-zero positive values less than the number of vfssw[] table
+	 * entries.
+	 */
+	if (fstype > 0 && fstype < nfstype) {
+		vsp = vopstats_fstype[fstype];
+	}
+
+	return (vsp);
+}
+
+/*
+ * Generate a kstat name, create the kstat structure, and allocate a
+ * vsk_anchor_t to hold it together.  Return the pointer to the vsk_anchor_t
+ * to the caller.  This must only be called from a mount.
+ */
+vsk_anchor_t *
+get_vskstat_anchor(vfs_t *vfsp)
+{
+	char		kstatstr[KSTAT_STRLEN]; /* kstat name for vopstats */
+	statvfs64_t	statvfsbuf;		/* Needed to find f_fsid */
+	vsk_anchor_t	*vskp = NULL;		/* vfs <--> kstat anchor */
+	kstat_t		*ksp;			/* Ptr to new kstat */
+	avl_index_t	where;			/* Location in the AVL tree */
+
+	if (vfsp == NULL || vfsp->vfs_implp == NULL ||
+	    (vfsp->vfs_flag & VFS_STATS) == 0 || !vopstats_enabled)
+		return (NULL);
+
+	/* Need to get the fsid to build a kstat name */
+	if (VFS_STATVFS(vfsp, &statvfsbuf) == 0) {
+		/* Create a name for our kstats based on fsid */
+		(void) snprintf(kstatstr, KSTAT_STRLEN, "%s%lx",
+		    VOPSTATS_STR, statvfsbuf.f_fsid);
+
+		/* Allocate and initialize the vsk_anchor_t */
+		vskp = kmem_cache_alloc(vsk_anchor_cache, KM_SLEEP);
+		bzero(vskp, sizeof (*vskp));
+		vskp->vsk_fsid = statvfsbuf.f_fsid;
+
+		mutex_enter(&vskstat_tree_lock);
+		if (avl_find(&vskstat_tree, vskp, &where) == NULL) {
+			avl_insert(&vskstat_tree, vskp, where);
+			mutex_exit(&vskstat_tree_lock);
+
+			/*
+			 * Now that we've got the anchor in the AVL
+			 * tree, we can create the kstat.
+			 */
+			ksp = new_vskstat(kstatstr, &vfsp->vfs_vopstats);
+			if (ksp) {
+				vskp->vsk_ksp = ksp;
+			}
+		} else {
+			/* Oops, found one! Release memory and lock. */
+			mutex_exit(&vskstat_tree_lock);
+			kmem_cache_free(vsk_anchor_cache, vskp);
+			vskp = NULL;
+		}
+	}
+	return (vskp);
+}
+
+/*
+ * We're in the process of tearing down the vfs and need to cleanup
+ * the data structures associated with the vopstats. Must only be called
+ * from dounmount().
+ */
+void
+teardown_vopstats(vfs_t *vfsp)
+{
+	vsk_anchor_t	*vskap;
+	avl_index_t	where;
+
+	if (vfsp == NULL || vfsp->vfs_implp == NULL ||
+	    (vfsp->vfs_flag & VFS_STATS) == 0 || !vopstats_enabled)
+		return;
+
+	/* This is a safe check since VFS_STATS must be set (see above) */
+	if ((vskap = vfsp->vfs_vskap) == NULL)
+		return;
+
+	/* Whack the pointer right away */
+	vfsp->vfs_vskap = NULL;
+
+	/* Lock the tree, remove the node, and delete the kstat */
+	mutex_enter(&vskstat_tree_lock);
+	if (avl_find(&vskstat_tree, vskap, &where)) {
+		avl_remove(&vskstat_tree, vskap);
+	}
+
+	if (vskap->vsk_ksp) {
+		kstat_delete(vskap->vsk_ksp);
+	}
+	mutex_exit(&vskstat_tree_lock);
+
+	kmem_cache_free(vsk_anchor_cache, vskap);
+}
+
+/*
+ * Read or write a vnode.  Called from kernel code.
+ */
+int
+vn_rdwr(
+	enum uio_rw rw,
+	struct vnode *vp,
+	caddr_t base,
+	ssize_t len,
+	offset_t offset,
+	enum uio_seg seg,
+	int ioflag,
+	rlim64_t ulimit,	/* meaningful only if rw is UIO_WRITE */
+	cred_t *cr,
+	ssize_t *residp)
+{
+	struct uio uio;
+	struct iovec iov;
+	int error;
+	int in_crit = 0;
+
+	if (rw == UIO_WRITE && ISROFILE(vp))
+		return (EROFS);
+
+	if (len < 0)
+		return (EIO);
+
+	VOPXID_MAP_CR(vp, cr);
+
+	iov.iov_base = base;
+	iov.iov_len = len;
+	uio.uio_iov = &iov;
+	uio.uio_iovcnt = 1;
+	uio.uio_loffset = offset;
+	uio.uio_segflg = (short)seg;
+	uio.uio_resid = len;
+	uio.uio_llimit = ulimit;
+
+	/*
+	 * We have to enter the critical region before calling VOP_RWLOCK
+	 * to avoid a deadlock with ufs.
+	 */
+	if (nbl_need_check(vp)) {
+		int svmand;
+
+		nbl_start_crit(vp, RW_READER);
+		in_crit = 1;
+		error = nbl_svmand(vp, cr, &svmand);
+		if (error != 0)
+			goto done;
+		if (nbl_conflict(vp, rw == UIO_WRITE ? NBL_WRITE : NBL_READ,
+		    uio.uio_offset, uio.uio_resid, svmand, NULL)) {
+			error = EACCES;
+			goto done;
+		}
+	}
+
+	(void) VOP_RWLOCK(vp,
+	    rw == UIO_WRITE ? V_WRITELOCK_TRUE : V_WRITELOCK_FALSE, NULL);
+	if (rw == UIO_WRITE) {
+		uio.uio_fmode = FWRITE;
+		uio.uio_extflg = UIO_COPY_DEFAULT;
+		error = VOP_WRITE(vp, &uio, ioflag, cr, NULL);
+	} else {
+		uio.uio_fmode = FREAD;
+		uio.uio_extflg = UIO_COPY_CACHED;
+		error = VOP_READ(vp, &uio, ioflag, cr, NULL);
+	}
+	VOP_RWUNLOCK(vp,
+	    rw == UIO_WRITE ? V_WRITELOCK_TRUE : V_WRITELOCK_FALSE, NULL);
+	if (residp)
+		*residp = uio.uio_resid;
+	else if (uio.uio_resid)
+		error = EIO;
+
+done:
+	if (in_crit)
+		nbl_end_crit(vp);
+	return (error);
+}
+
+/*
+ * Release a vnode.  Call VOP_INACTIVE on last reference or
+ * decrement reference count.
+ *
+ * To avoid race conditions, the v_count is left at 1 for
+ * the call to VOP_INACTIVE. This prevents another thread
+ * from reclaiming and releasing the vnode *before* the
+ * VOP_INACTIVE routine has a chance to destroy the vnode.
+ * We can't have more than 1 thread calling VOP_INACTIVE
+ * on a vnode.
+ */
+void
+vn_rele(vnode_t *vp)
+{
+	VERIFY(vp->v_count > 0);
+	mutex_enter(&vp->v_lock);
+	if (vp->v_count == 1) {
+		mutex_exit(&vp->v_lock);
+		VOP_INACTIVE(vp, CRED(), NULL);
+		return;
+	}
+	vp->v_count--;
+	mutex_exit(&vp->v_lock);
+}
+
+/*
+ * Release a vnode referenced by the DNLC. Multiple DNLC references are treated
+ * as a single reference, so v_count is not decremented until the last DNLC hold
+ * is released. This makes it possible to distinguish vnodes that are referenced
+ * only by the DNLC.
+ */
+void
+vn_rele_dnlc(vnode_t *vp)
+{
+	VERIFY((vp->v_count > 0) && (vp->v_count_dnlc > 0));
+	mutex_enter(&vp->v_lock);
+	if (--vp->v_count_dnlc == 0) {
+		if (vp->v_count == 1) {
+			mutex_exit(&vp->v_lock);
+			VOP_INACTIVE(vp, CRED(), NULL);
+			return;
+		}
+		vp->v_count--;
+	}
+	mutex_exit(&vp->v_lock);
+}
+
+/*
+ * Like vn_rele() except that it clears v_stream under v_lock.
+ * This is used by sockfs when it dismantels the association between
+ * the sockfs node and the vnode in the underlaying file system.
+ * v_lock has to be held to prevent a thread coming through the lookupname
+ * path from accessing a stream head that is going away.
+ */
+void
+vn_rele_stream(vnode_t *vp)
+{
+	VERIFY(vp->v_count > 0);
+	mutex_enter(&vp->v_lock);
+	vp->v_stream = NULL;
+	if (vp->v_count == 1) {
+		mutex_exit(&vp->v_lock);
+		VOP_INACTIVE(vp, CRED(), NULL);
+		return;
+	}
+	vp->v_count--;
+	mutex_exit(&vp->v_lock);
+}
+
+static void
+vn_rele_inactive(vnode_t *vp)
+{
+	VOP_INACTIVE(vp, CRED(), NULL);
+}
+
+/*
+ * Like vn_rele() except if we are going to call VOP_INACTIVE() then do it
+ * asynchronously using a taskq. This can avoid deadlocks caused by re-entering
+ * the file system as a result of releasing the vnode. Note, file systems
+ * already have to handle the race where the vnode is incremented before the
+ * inactive routine is called and does its locking.
+ *
+ * Warning: Excessive use of this routine can lead to performance problems.
+ * This is because taskqs throttle back allocation if too many are created.
+ */
+void
+vn_rele_async(vnode_t *vp, taskq_t *taskq)
+{
+	VERIFY(vp->v_count > 0);
+	mutex_enter(&vp->v_lock);
+	if (vp->v_count == 1) {
+		mutex_exit(&vp->v_lock);
+		VERIFY(taskq_dispatch(taskq, (task_func_t *)vn_rele_inactive,
+		    vp, TQ_SLEEP) != NULL);
+		return;
+	}
+	vp->v_count--;
+	mutex_exit(&vp->v_lock);
+}
+
+int
+vn_open(
+	char *pnamep,
+	enum uio_seg seg,
+	int filemode,
+	int createmode,
+	struct vnode **vpp,
+	enum create crwhy,
+	mode_t umask)
+{
+	return (vn_openat(pnamep, seg, filemode, createmode, vpp, crwhy,
+	    umask, NULL, -1));
+}
+
+
+/*
+ * Open/create a vnode.
+ * This may be callable by the kernel, the only known use
+ * of user context being that the current user credentials
+ * are used for permissions.  crwhy is defined iff filemode & FCREAT.
+ */
+int
+vn_openat(
+	char *pnamep,
+	enum uio_seg seg,
+	int filemode,
+	int createmode,
+	struct vnode **vpp,
+	enum create crwhy,
+	mode_t umask,
+	struct vnode *startvp,
+	int fd)
+{
+	struct vnode *vp;
+	int mode;
+	int accessflags;
+	int error;
+	int in_crit = 0;
+	int open_done = 0;
+	int shrlock_done = 0;
+	struct vattr vattr;
+	enum symfollow follow;
+	int estale_retry = 0;
+	struct shrlock shr;
+	struct shr_locowner shr_own;
+
+	mode = 0;
+	accessflags = 0;
+	if (filemode & FREAD)
+		mode |= VREAD;
+	if (filemode & (FWRITE|FTRUNC))
+		mode |= VWRITE;
+	if (filemode & (FSEARCH|FEXEC|FXATTRDIROPEN))
+		mode |= VEXEC;
+
+	/* symlink interpretation */
+	if (filemode & FNOFOLLOW)
+		follow = NO_FOLLOW;
+	else
+		follow = FOLLOW;
+
+	if (filemode & FAPPEND)
+		accessflags |= V_APPEND;
+
+top:
+	if (filemode & FCREAT) {
+		enum vcexcl excl;
+
+		/*
+		 * Wish to create a file.
+		 */
+		vattr.va_type = VREG;
+		vattr.va_mode = createmode;
+		vattr.va_mask = AT_TYPE|AT_MODE;
+		if (filemode & FTRUNC) {
+			vattr.va_size = 0;
+			vattr.va_mask |= AT_SIZE;
+		}
+		if (filemode & FEXCL)
+			excl = EXCL;
+		else
+			excl = NONEXCL;
+
+		if (error =
+		    vn_createat(pnamep, seg, &vattr, excl, mode, &vp, crwhy,
+		    (filemode & ~(FTRUNC|FEXCL)), umask, startvp))
+			return (error);
+	} else {
+		/*
+		 * Wish to open a file.  Just look it up.
+		 */
+		if (error = lookupnameat(pnamep, seg, follow,
+		    NULLVPP, &vp, startvp)) {
+			if ((error == ESTALE) &&
+			    fs_need_estale_retry(estale_retry++))
+				goto top;
+			return (error);
+		}
+
+		/*
+		 * Get the attributes to check whether file is large.
+		 * We do this only if the FOFFMAX flag is not set and
+		 * only for regular files.
+		 */
+
+		if (!(filemode & FOFFMAX) && (vp->v_type == VREG)) {
+			vattr.va_mask = AT_SIZE;
+			if ((error = VOP_GETATTR(vp, &vattr, 0,
+			    CRED(), NULL))) {
+				goto out;
+			}
+			if (vattr.va_size > (u_offset_t)MAXOFF32_T) {
+				/*
+				 * Large File API - regular open fails
+				 * if FOFFMAX flag is set in file mode
+				 */
+				error = EOVERFLOW;
+				goto out;
+			}
+		}
+		/*
+		 * Can't write directories, active texts, or
+		 * read-only filesystems.  Can't truncate files
+		 * on which mandatory locking is in effect.
+		 */
+		if (filemode & (FWRITE|FTRUNC)) {
+			/*
+			 * Allow writable directory if VDIROPEN flag is set.
+			 */
+			if (vp->v_type == VDIR && !(vp->v_flag & VDIROPEN)) {
+				error = EISDIR;
+				goto out;
+			}
+			if (ISROFILE(vp)) {
+				error = EROFS;
+				goto out;
+			}
+			/*
+			 * Can't truncate files on which
+			 * sysv mandatory locking is in effect.
+			 */
+			if (filemode & FTRUNC) {
+				vnode_t *rvp;
+
+				if (VOP_REALVP(vp, &rvp, NULL) != 0)
+					rvp = vp;
+				if (rvp->v_filocks != NULL) {
+					vattr.va_mask = AT_MODE;
+					if ((error = VOP_GETATTR(vp,
+					    &vattr, 0, CRED(), NULL)) == 0 &&
+					    MANDLOCK(vp, vattr.va_mode))
+						error = EAGAIN;
+				}
+			}
+			if (error)
+				goto out;
+		}
+		/*
+		 * Check permissions.
+		 */
+		if (error = VOP_ACCESS(vp, mode, accessflags, CRED(), NULL))
+			goto out;
+		/*
+		 * Require FSEARCH to return a directory.
+		 * Require FEXEC to return a regular file.
+		 */
+		if ((filemode & FSEARCH) && vp->v_type != VDIR) {
+			error = ENOTDIR;
+			goto out;
+		}
+		if ((filemode & FEXEC) && vp->v_type != VREG) {
+			error = ENOEXEC;	/* XXX: error code? */
+			goto out;
+		}
+	}
+
+	/*
+	 * Do remaining checks for FNOFOLLOW and FNOLINKS.
+	 */
+	if ((filemode & FNOFOLLOW) && vp->v_type == VLNK) {
+		error = ELOOP;
+		goto out;
+	}
+	if (filemode & FNOLINKS) {
+		vattr.va_mask = AT_NLINK;
+		if ((error = VOP_GETATTR(vp, &vattr, 0, CRED(), NULL))) {
+			goto out;
+		}
+		if (vattr.va_nlink != 1) {
+			error = EMLINK;
+			goto out;
+		}
+	}
+
+	/*
+	 * Opening a socket corresponding to the AF_UNIX pathname
+	 * in the filesystem name space is not supported.
+	 * However, VSOCK nodes in namefs are supported in order
+	 * to make fattach work for sockets.
+	 *
+	 * XXX This uses VOP_REALVP to distinguish between
+	 * an unopened namefs node (where VOP_REALVP returns a
+	 * different VSOCK vnode) and a VSOCK created by vn_create
+	 * in some file system (where VOP_REALVP would never return
+	 * a different vnode).
+	 */
+	if (vp->v_type == VSOCK) {
+		struct vnode *nvp;
+
+		error = VOP_REALVP(vp, &nvp, NULL);
+		if (error != 0 || nvp == NULL || nvp == vp ||
+		    nvp->v_type != VSOCK) {
+			error = EOPNOTSUPP;
+			goto out;
+		}
+	}
+
+	if ((vp->v_type == VREG) && nbl_need_check(vp)) {
+		/* get share reservation */
+		shr.s_access = 0;
+		if (filemode & FWRITE)
+			shr.s_access |= F_WRACC;
+		if (filemode & FREAD)
+			shr.s_access |= F_RDACC;
+		shr.s_deny = 0;
+		shr.s_sysid = 0;
+		shr.s_pid = ttoproc(curthread)->p_pid;
+		shr_own.sl_pid = shr.s_pid;
+		shr_own.sl_id = fd;
+		shr.s_own_len = sizeof (shr_own);
+		shr.s_owner = (caddr_t)&shr_own;
+		error = VOP_SHRLOCK(vp, F_SHARE_NBMAND, &shr, filemode, CRED(),
+		    NULL);
+		if (error)
+			goto out;
+		shrlock_done = 1;
+
+		/* nbmand conflict check if truncating file */
+		if ((filemode & FTRUNC) && !(filemode & FCREAT)) {
+			nbl_start_crit(vp, RW_READER);
+			in_crit = 1;
+
+			vattr.va_mask = AT_SIZE;
+			if (error = VOP_GETATTR(vp, &vattr, 0, CRED(), NULL))
+				goto out;
+			if (nbl_conflict(vp, NBL_WRITE, 0, vattr.va_size, 0,
+			    NULL)) {
+				error = EACCES;
+				goto out;
+			}
+		}
+	}
+
+	/*
+	 * Do opening protocol.
+	 */
+	error = VOP_OPEN(&vp, filemode, CRED(), NULL);
+	if (error)
+		goto out;
+	open_done = 1;
+
+	/*
+	 * Truncate if required.
+	 */
+	if ((filemode & FTRUNC) && !(filemode & FCREAT)) {
+		vattr.va_size = 0;
+		vattr.va_mask = AT_SIZE;
+		if ((error = VOP_SETATTR(vp, &vattr, 0, CRED(), NULL)) != 0)
+			goto out;
+	}
+out:
+	ASSERT(vp->v_count > 0);
+
+	if (in_crit) {
+		nbl_end_crit(vp);
+		in_crit = 0;
+	}
+	if (error) {
+		if (open_done) {
+			(void) VOP_CLOSE(vp, filemode, 1, (offset_t)0, CRED(),
+			    NULL);
+			open_done = 0;
+			shrlock_done = 0;
+		}
+		if (shrlock_done) {
+			(void) VOP_SHRLOCK(vp, F_UNSHARE, &shr, 0, CRED(),
+			    NULL);
+			shrlock_done = 0;
+		}
+
+		/*
+		 * The following clause was added to handle a problem
+		 * with NFS consistency.  It is possible that a lookup
+		 * of the file to be opened succeeded, but the file
+		 * itself doesn't actually exist on the server.  This
+		 * is chiefly due to the DNLC containing an entry for
+		 * the file which has been removed on the server.  In
+		 * this case, we just start over.  If there was some
+		 * other cause for the ESTALE error, then the lookup
+		 * of the file will fail and the error will be returned
+		 * above instead of looping around from here.
+		 */
+		VN_RELE(vp);
+		if ((error == ESTALE) && fs_need_estale_retry(estale_retry++))
+			goto top;
+	} else
+		*vpp = vp;
+	return (error);
+}
+
+/*
+ * The following two accessor functions are for the NFSv4 server.  Since there
+ * is no VOP_OPEN_UP/DOWNGRADE we need a way for the NFS server to keep the
+ * vnode open counts correct when a client "upgrades" an open or does an
+ * open_downgrade.  In NFS, an upgrade or downgrade can not only change the
+ * open mode (add or subtract read or write), but also change the share/deny
+ * modes.  However, share reservations are not integrated with OPEN, yet, so
+ * we need to handle each separately.  These functions are cleaner than having
+ * the NFS server manipulate the counts directly, however, nobody else should
+ * use these functions.
+ */
+void
+vn_open_upgrade(
+	vnode_t *vp,
+	int filemode)
+{
+	ASSERT(vp->v_type == VREG);
+
+	if (filemode & FREAD)
+		atomic_add_32(&(vp->v_rdcnt), 1);
+	if (filemode & FWRITE)
+		atomic_add_32(&(vp->v_wrcnt), 1);
+
+}
+
+void
+vn_open_downgrade(
+	vnode_t *vp,
+	int filemode)
+{
+	ASSERT(vp->v_type == VREG);
+
+	if (filemode & FREAD) {
+		ASSERT(vp->v_rdcnt > 0);
+		atomic_add_32(&(vp->v_rdcnt), -1);
+	}
+	if (filemode & FWRITE) {
+		ASSERT(vp->v_wrcnt > 0);
+		atomic_add_32(&(vp->v_wrcnt), -1);
+	}
+
+}
+
+int
+vn_create(
+	char *pnamep,
+	enum uio_seg seg,
+	struct vattr *vap,
+	enum vcexcl excl,
+	int mode,
+	struct vnode **vpp,
+	enum create why,
+	int flag,
+	mode_t umask)
+{
+	return (vn_createat(pnamep, seg, vap, excl, mode, vpp, why, flag,
+	    umask, NULL));
+}
+
+/*
+ * Create a vnode (makenode).
+ */
+int
+vn_createat(
+	char *pnamep,
+	enum uio_seg seg,
+	struct vattr *vap,
+	enum vcexcl excl,
+	int mode,
+	struct vnode **vpp,
+	enum create why,
+	int flag,
+	mode_t umask,
+	struct vnode *startvp)
+{
+	struct vnode *dvp;	/* ptr to parent dir vnode */
+	struct vnode *vp = NULL;
+	struct pathname pn;
+	int error;
+	int in_crit = 0;
+	struct vattr vattr;
+	enum symfollow follow;
+	int estale_retry = 0;
+	uint32_t auditing = AU_AUDITING();
+
+	ASSERT((vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE));
+
+	/* symlink interpretation */
+	if ((flag & FNOFOLLOW) || excl == EXCL)
+		follow = NO_FOLLOW;
+	else
+		follow = FOLLOW;
+	flag &= ~(FNOFOLLOW|FNOLINKS);
+
+top:
+	/*
+	 * Lookup directory.
+	 * If new object is a file, call lower level to create it.
+	 * Note that it is up to the lower level to enforce exclusive
+	 * creation, if the file is already there.
+	 * This allows the lower level to do whatever
+	 * locking or protocol that is needed to prevent races.
+	 * If the new object is directory call lower level to make
+	 * the new directory, with "." and "..".
+	 */
+	if (error = pn_get(pnamep, seg, &pn))
+		return (error);
+	if (auditing)
+		audit_vncreate_start();
+	dvp = NULL;
+	*vpp = NULL;
+	/*
+	 * lookup will find the parent directory for the vnode.
+	 * When it is done the pn holds the name of the entry
+	 * in the directory.
+	 * If this is a non-exclusive create we also find the node itself.
+	 */
+	error = lookuppnat(&pn, NULL, follow, &dvp,
+	    (excl == EXCL) ? NULLVPP : vpp, startvp);
+	if (error) {
+		pn_free(&pn);
+		if ((error == ESTALE) && fs_need_estale_retry(estale_retry++))
+			goto top;
+		if (why == CRMKDIR && error == EINVAL)
+			error = EEXIST;		/* SVID */
+		return (error);
+	}
+
+	if (why != CRMKNOD)
+		vap->va_mode &= ~VSVTX;
+
+	/*
+	 * If default ACLs are defined for the directory don't apply the
+	 * umask if umask is passed.
+	 */
+
+	if (umask) {
+
+		vsecattr_t vsec;
+
+		vsec.vsa_aclcnt = 0;
+		vsec.vsa_aclentp = NULL;
+		vsec.vsa_dfaclcnt = 0;
+		vsec.vsa_dfaclentp = NULL;
+		vsec.vsa_mask = VSA_DFACLCNT;
+		error = VOP_GETSECATTR(dvp, &vsec, 0, CRED(), NULL);
+		/*
+		 * If error is ENOSYS then treat it as no error
+		 * Don't want to force all file systems to support
+		 * aclent_t style of ACL's.
+		 */
+		if (error == ENOSYS)
+			error = 0;
+		if (error) {
+			if (*vpp != NULL)
+				VN_RELE(*vpp);
+			goto out;
+		} else {
+			/*
+			 * Apply the umask if no default ACLs.
+			 */
+			if (vsec.vsa_dfaclcnt == 0)
+				vap->va_mode &= ~umask;
+
+			/*
+			 * VOP_GETSECATTR() may have allocated memory for
+			 * ACLs we didn't request, so double-check and
+			 * free it if necessary.
+			 */
+			if (vsec.vsa_aclcnt && vsec.vsa_aclentp != NULL)
+				kmem_free((caddr_t)vsec.vsa_aclentp,
+				    vsec.vsa_aclcnt * sizeof (aclent_t));
+			if (vsec.vsa_dfaclcnt && vsec.vsa_dfaclentp != NULL)
+				kmem_free((caddr_t)vsec.vsa_dfaclentp,
+				    vsec.vsa_dfaclcnt * sizeof (aclent_t));
+		}
+	}
+
+	/*
+	 * In general we want to generate EROFS if the file system is
+	 * readonly.  However, POSIX (IEEE Std. 1003.1) section 5.3.1
+	 * documents the open system call, and it says that O_CREAT has no
+	 * effect if the file already exists.  Bug 1119649 states
+	 * that open(path, O_CREAT, ...) fails when attempting to open an
+	 * existing file on a read only file system.  Thus, the first part
+	 * of the following if statement has 3 checks:
+	 *	if the file exists &&
+	 *		it is being open with write access &&
+	 *		the file system is read only
+	 *	then generate EROFS
+	 */
+	if ((*vpp != NULL && (mode & VWRITE) && ISROFILE(*vpp)) ||
+	    (*vpp == NULL && dvp->v_vfsp->vfs_flag & VFS_RDONLY)) {
+		if (*vpp)
+			VN_RELE(*vpp);
+		error = EROFS;
+	} else if (excl == NONEXCL && *vpp != NULL) {
+		vnode_t *rvp;
+
+		/*
+		 * File already exists.  If a mandatory lock has been
+		 * applied, return error.
+		 */
+		vp = *vpp;
+		if (VOP_REALVP(vp, &rvp, NULL) != 0)
+			rvp = vp;
+		if ((vap->va_mask & AT_SIZE) && nbl_need_check(vp)) {
+			nbl_start_crit(vp, RW_READER);
+			in_crit = 1;
+		}
+		if (rvp->v_filocks != NULL || rvp->v_shrlocks != NULL) {
+			vattr.va_mask = AT_MODE|AT_SIZE;
+			if (error = VOP_GETATTR(vp, &vattr, 0, CRED(), NULL)) {
+				goto out;
+			}
+			if (MANDLOCK(vp, vattr.va_mode)) {
+				error = EAGAIN;
+				goto out;
+			}
+			/*
+			 * File cannot be truncated if non-blocking mandatory
+			 * locks are currently on the file.
+			 */
+			if ((vap->va_mask & AT_SIZE) && in_crit) {
+				u_offset_t offset;
+				ssize_t length;
+
+				offset = vap->va_size > vattr.va_size ?
+				    vattr.va_size : vap->va_size;
+				length = vap->va_size > vattr.va_size ?
+				    vap->va_size - vattr.va_size :
+				    vattr.va_size - vap->va_size;
+				if (nbl_conflict(vp, NBL_WRITE, offset,
+				    length, 0, NULL)) {
+					error = EACCES;
+					goto out;
+				}
+			}
+		}
+
+		/*
+		 * If the file is the root of a VFS, we've crossed a
+		 * mount point and the "containing" directory that we
+		 * acquired above (dvp) is irrelevant because it's in
+		 * a different file system.  We apply VOP_CREATE to the
+		 * target itself instead of to the containing directory
+		 * and supply a null path name to indicate (conventionally)
+		 * the node itself as the "component" of interest.
+		 *
+		 * The intercession of the file system is necessary to
+		 * ensure that the appropriate permission checks are
+		 * done.
+		 */
+		if (vp->v_flag & VROOT) {
+			ASSERT(why != CRMKDIR);
+			error = VOP_CREATE(vp, "", vap, excl, mode, vpp,
+			    CRED(), flag, NULL, NULL);
+			/*
+			 * If the create succeeded, it will have created
+			 * a new reference to the vnode.  Give up the
+			 * original reference.  The assertion should not
+			 * get triggered because NBMAND locks only apply to
+			 * VREG files.  And if in_crit is non-zero for some
+			 * reason, detect that here, rather than when we
+			 * deference a null vp.
+			 */
+			ASSERT(in_crit == 0);
+			VN_RELE(vp);
+			vp = NULL;
+			goto out;
+		}
+
+		/*
+		 * Large File API - non-large open (FOFFMAX flag not set)
+		 * of regular file fails if the file size exceeds MAXOFF32_T.
+		 */
+		if (why != CRMKDIR &&
+		    !(flag & FOFFMAX) &&
+		    (vp->v_type == VREG)) {
+			vattr.va_mask = AT_SIZE;
+			if ((error = VOP_GETATTR(vp, &vattr, 0,
+			    CRED(), NULL))) {
+				goto out;
+			}
+			if ((vattr.va_size > (u_offset_t)MAXOFF32_T)) {
+				error = EOVERFLOW;
+				goto out;
+			}
+		}
+	}
+
+	if (error == 0) {
+		/*
+		 * Call mkdir() if specified, otherwise create().
+		 */
+		int must_be_dir = pn_fixslash(&pn);	/* trailing '/'? */
+
+		if (why == CRMKDIR)
+			/*
+			 * N.B., if vn_createat() ever requests
+			 * case-insensitive behavior then it will need
+			 * to be passed to VOP_MKDIR().  VOP_CREATE()
+			 * will already get it via "flag"
+			 */
+			error = VOP_MKDIR(dvp, pn.pn_path, vap, vpp, CRED(),
+			    NULL, 0, NULL);
+		else if (!must_be_dir)
+			error = VOP_CREATE(dvp, pn.pn_path, vap,
+			    excl, mode, vpp, CRED(), flag, NULL, NULL);
+		else
+			error = ENOTDIR;
+	}
+
+out:
+
+	if (auditing)
+		audit_vncreate_finish(*vpp, error);
+	if (in_crit) {
+		nbl_end_crit(vp);
+		in_crit = 0;
+	}
+	if (vp != NULL) {
+		VN_RELE(vp);
+		vp = NULL;
+	}
+	pn_free(&pn);
+	VN_RELE(dvp);
+	/*
+	 * The following clause was added to handle a problem
+	 * with NFS consistency.  It is possible that a lookup
+	 * of the file to be created succeeded, but the file
+	 * itself doesn't actually exist on the server.  This
+	 * is chiefly due to the DNLC containing an entry for
+	 * the file which has been removed on the server.  In
+	 * this case, we just start over.  If there was some
+	 * other cause for the ESTALE error, then the lookup
+	 * of the file will fail and the error will be returned
+	 * above instead of looping around from here.
+	 */
+	if ((error == ESTALE) && fs_need_estale_retry(estale_retry++))
+		goto top;
+	return (error);
+}
+
+int
+vn_link(char *from, char *to, enum uio_seg seg)
+{
+	return (vn_linkat(NULL, from, NO_FOLLOW, NULL, to, seg));
+}
+
+int
+vn_linkat(vnode_t *fstartvp, char *from, enum symfollow follow,
+    vnode_t *tstartvp, char *to, enum uio_seg seg)
+{
+	struct vnode *fvp;		/* from vnode ptr */
+	struct vnode *tdvp;		/* to directory vnode ptr */
+	struct pathname pn;
+	int error;
+	struct vattr vattr;
+	dev_t fsid;
+	int estale_retry = 0;
+	uint32_t auditing = AU_AUDITING();
+
+top:
+	fvp = tdvp = NULL;
+	if (error = pn_get(to, seg, &pn))
+		return (error);
+	if (auditing && fstartvp != NULL)
+		audit_setfsat_path(1);
+	if (error = lookupnameat(from, seg, follow, NULLVPP, &fvp, fstartvp))
+		goto out;
+	if (auditing && tstartvp != NULL)
+		audit_setfsat_path(3);
+	if (error = lookuppnat(&pn, NULL, NO_FOLLOW, &tdvp, NULLVPP, tstartvp))
+		goto out;
+	/*
+	 * Make sure both source vnode and target directory vnode are
+	 * in the same vfs and that it is writeable.
+	 */
+	vattr.va_mask = AT_FSID;
+	if (error = VOP_GETATTR(fvp, &vattr, 0, CRED(), NULL))
+		goto out;
+	fsid = vattr.va_fsid;
+	vattr.va_mask = AT_FSID;
+	if (error = VOP_GETATTR(tdvp, &vattr, 0, CRED(), NULL))
+		goto out;
+	if (fsid != vattr.va_fsid) {
+		error = EXDEV;
+		goto out;
+	}
+	if (tdvp->v_vfsp->vfs_flag & VFS_RDONLY) {
+		error = EROFS;
+		goto out;
+	}
+	/*
+	 * Do the link.
+	 */
+	(void) pn_fixslash(&pn);
+	error = VOP_LINK(tdvp, fvp, pn.pn_path, CRED(), NULL, 0);
+out:
+	pn_free(&pn);
+	if (fvp)
+		VN_RELE(fvp);
+	if (tdvp)
+		VN_RELE(tdvp);
+	if ((error == ESTALE) && fs_need_estale_retry(estale_retry++))
+		goto top;
+	return (error);
+}
+
+int
+vn_rename(char *from, char *to, enum uio_seg seg)
+{
+	return (vn_renameat(NULL, from, NULL, to, seg));
+}
+
+int
+vn_renameat(vnode_t *fdvp, char *fname, vnode_t *tdvp,
+		char *tname, enum uio_seg seg)
+{
+	int error;
+	struct vattr vattr;
+	struct pathname fpn;		/* from pathname */
+	struct pathname tpn;		/* to pathname */
+	dev_t fsid;
+	int in_crit_src, in_crit_targ;
+	vnode_t *fromvp, *fvp;
+	vnode_t *tovp, *targvp;
+	int estale_retry = 0;
+	uint32_t auditing = AU_AUDITING();
+
+top:
+	fvp = fromvp = tovp = targvp = NULL;
+	in_crit_src = in_crit_targ = 0;
+	/*
+	 * Get to and from pathnames.
+	 */
+	if (error = pn_get(fname, seg, &fpn))
+		return (error);
+	if (error = pn_get(tname, seg, &tpn)) {
+		pn_free(&fpn);
+		return (error);
+	}
+
+	/*
+	 * First we need to resolve the correct directories
+	 * The passed in directories may only be a starting point,
+	 * but we need the real directories the file(s) live in.
+	 * For example the fname may be something like usr/lib/sparc
+	 * and we were passed in the / directory, but we need to
+	 * use the lib directory for the rename.
+	 */
+
+	if (auditing && fdvp != NULL)
+		audit_setfsat_path(1);
+	/*
+	 * Lookup to and from directories.
+	 */
+	if (error = lookuppnat(&fpn, NULL, NO_FOLLOW, &fromvp, &fvp, fdvp)) {
+		goto out;
+	}
+
+	/*
+	 * Make sure there is an entry.
+	 */
+	if (fvp == NULL) {
+		error = ENOENT;
+		goto out;
+	}
+
+	if (auditing && tdvp != NULL)
+		audit_setfsat_path(3);
+	if (error = lookuppnat(&tpn, NULL, NO_FOLLOW, &tovp, &targvp, tdvp)) {
+		goto out;
+	}
+
+	/*
+	 * Make sure both the from vnode directory and the to directory
+	 * are in the same vfs and the to directory is writable.
+	 * We check fsid's, not vfs pointers, so loopback fs works.
+	 */
+	if (fromvp != tovp) {
+		vattr.va_mask = AT_FSID;
+		if (error = VOP_GETATTR(fromvp, &vattr, 0, CRED(), NULL))
+			goto out;
+		fsid = vattr.va_fsid;
+		vattr.va_mask = AT_FSID;
+		if (error = VOP_GETATTR(tovp, &vattr, 0, CRED(), NULL))
+			goto out;
+		if (fsid != vattr.va_fsid) {
+			error = EXDEV;
+			goto out;
+		}
+	}
+
+	if (tovp->v_vfsp->vfs_flag & VFS_RDONLY) {
+		error = EROFS;
+		goto out;
+	}
+
+	if (targvp && (fvp != targvp)) {
+		nbl_start_crit(targvp, RW_READER);
+		in_crit_targ = 1;
+		if (nbl_conflict(targvp, NBL_REMOVE, 0, 0, 0, NULL)) {
+			error = EACCES;
+			goto out;
+		}
+	}
+
+	if (nbl_need_check(fvp)) {
+		nbl_start_crit(fvp, RW_READER);
+		in_crit_src = 1;
+		if (nbl_conflict(fvp, NBL_RENAME, 0, 0, 0, NULL)) {
+			error = EACCES;
+			goto out;
+		}
+	}
+
+	/*
+	 * Do the rename.
+	 */
+	(void) pn_fixslash(&tpn);
+	error = VOP_RENAME(fromvp, fpn.pn_path, tovp, tpn.pn_path, CRED(),
+	    NULL, 0);
+
+out:
+	pn_free(&fpn);
+	pn_free(&tpn);
+	if (in_crit_src)
+		nbl_end_crit(fvp);
+	if (in_crit_targ)
+		nbl_end_crit(targvp);
+	if (fromvp)
+		VN_RELE(fromvp);
+	if (tovp)
+		VN_RELE(tovp);
+	if (targvp)
+		VN_RELE(targvp);
+	if (fvp)
+		VN_RELE(fvp);
+	if ((error == ESTALE) && fs_need_estale_retry(estale_retry++))
+		goto top;
+	return (error);
+}
+
+/*
+ * Remove a file or directory.
+ */
+int
+vn_remove(char *fnamep, enum uio_seg seg, enum rm dirflag)
+{
+	return (vn_removeat(NULL, fnamep, seg, dirflag));
+}
+
+int
+vn_removeat(vnode_t *startvp, char *fnamep, enum uio_seg seg, enum rm dirflag)
+{
+	struct vnode *vp;		/* entry vnode */
+	struct vnode *dvp;		/* ptr to parent dir vnode */
+	struct vnode *coveredvp;
+	struct pathname pn;		/* name of entry */
+	enum vtype vtype;
+	int error;
+	struct vfs *vfsp;
+	struct vfs *dvfsp;	/* ptr to parent dir vfs */
+	int in_crit = 0;
+	int estale_retry = 0;
+
+top:
+	if (error = pn_get(fnamep, seg, &pn))
+		return (error);
+	dvp = vp = NULL;
+	if (error = lookuppnat(&pn, NULL, NO_FOLLOW, &dvp, &vp, startvp)) {
+		pn_free(&pn);
+		if ((error == ESTALE) && fs_need_estale_retry(estale_retry++))
+			goto top;
+		return (error);
+	}
+
+	/*
+	 * Make sure there is an entry.
+	 */
+	if (vp == NULL) {
+		error = ENOENT;
+		goto out;
+	}
+
+	vfsp = vp->v_vfsp;
+	dvfsp = dvp->v_vfsp;
+
+	/*
+	 * If the named file is the root of a mounted filesystem, fail,
+	 * unless it's marked unlinkable.  In that case, unmount the
+	 * filesystem and proceed to unlink the covered vnode.  (If the
+	 * covered vnode is a directory, use rmdir instead of unlink,
+	 * to avoid file system corruption.)
+	 */
+	if (vp->v_flag & VROOT) {
+		if ((vfsp->vfs_flag & VFS_UNLINKABLE) == 0) {
+			error = EBUSY;
+			goto out;
+		}
+
+		/*
+		 * Namefs specific code starts here.
+		 */
+
+		if (dirflag == RMDIRECTORY) {
+			/*
+			 * User called rmdir(2) on a file that has
+			 * been namefs mounted on top of.  Since
+			 * namefs doesn't allow directories to
+			 * be mounted on other files we know
+			 * vp is not of type VDIR so fail to operation.
+			 */
+			error = ENOTDIR;
+			goto out;
+		}
+
+		/*
+		 * If VROOT is still set after grabbing vp->v_lock,
+		 * noone has finished nm_unmount so far and coveredvp
+		 * is valid.
+		 * If we manage to grab vn_vfswlock(coveredvp) before releasing
+		 * vp->v_lock, any race window is eliminated.
+		 */
+
+		mutex_enter(&vp->v_lock);
+		if ((vp->v_flag & VROOT) == 0) {
+			/* Someone beat us to the unmount */
+			mutex_exit(&vp->v_lock);
+			error = EBUSY;
+			goto out;
+		}
+		vfsp = vp->v_vfsp;
+		coveredvp = vfsp->vfs_vnodecovered;
+		ASSERT(coveredvp);
+		/*
+		 * Note: Implementation of vn_vfswlock shows that ordering of
+		 * v_lock / vn_vfswlock is not an issue here.
+		 */
+		error = vn_vfswlock(coveredvp);
+		mutex_exit(&vp->v_lock);
+
+		if (error)
+			goto out;
+
+		VN_HOLD(coveredvp);
+		VN_RELE(vp);
+		error = dounmount(vfsp, 0, CRED());
+
+		/*
+		 * Unmounted the namefs file system; now get
+		 * the object it was mounted over.
+		 */
+		vp = coveredvp;
+		/*
+		 * If namefs was mounted over a directory, then
+		 * we want to use rmdir() instead of unlink().
+		 */
+		if (vp->v_type == VDIR)
+			dirflag = RMDIRECTORY;
+
+		if (error)
+			goto out;
+	}
+
+	/*
+	 * Make sure filesystem is writeable.
+	 * We check the parent directory's vfs in case this is an lofs vnode.
+	 */
+	if (dvfsp && dvfsp->vfs_flag & VFS_RDONLY) {
+		error = EROFS;
+		goto out;
+	}
+
+	vtype = vp->v_type;
+
+	/*
+	 * If there is the possibility of an nbmand share reservation, make
+	 * sure it's okay to remove the file.  Keep a reference to the
+	 * vnode, so that we can exit the nbl critical region after
+	 * calling VOP_REMOVE.
+	 * If there is no possibility of an nbmand share reservation,
+	 * release the vnode reference now.  Filesystems like NFS may
+	 * behave differently if there is an extra reference, so get rid of
+	 * this one.  Fortunately, we can't have nbmand mounts on NFS
+	 * filesystems.
+	 */
+	if (nbl_need_check(vp)) {
+		nbl_start_crit(vp, RW_READER);
+		in_crit = 1;
+		if (nbl_conflict(vp, NBL_REMOVE, 0, 0, 0, NULL)) {
+			error = EACCES;
+			goto out;
+		}
+	} else {
+		VN_RELE(vp);
+		vp = NULL;
+	}
+
+	if (dirflag == RMDIRECTORY) {
+		/*
+		 * Caller is using rmdir(2), which can only be applied to
+		 * directories.
+		 */
+		if (vtype != VDIR) {
+			error = ENOTDIR;
+		} else {
+			vnode_t *cwd;
+			proc_t *pp = curproc;
+
+			mutex_enter(&pp->p_lock);
+			cwd = PTOU(pp)->u_cdir;
+			VN_HOLD(cwd);
+			mutex_exit(&pp->p_lock);
+			error = VOP_RMDIR(dvp, pn.pn_path, cwd, CRED(),
+			    NULL, 0);
+			VN_RELE(cwd);
+		}
+	} else {
+		/*
+		 * Unlink(2) can be applied to anything.
+		 */
+		error = VOP_REMOVE(dvp, pn.pn_path, CRED(), NULL, 0);
+	}
+
+out:
+	pn_free(&pn);
+	if (in_crit) {
+		nbl_end_crit(vp);
+		in_crit = 0;
+	}
+	if (vp != NULL)
+		VN_RELE(vp);
+	if (dvp != NULL)
+		VN_RELE(dvp);
+	if ((error == ESTALE) && fs_need_estale_retry(estale_retry++))
+		goto top;
+	return (error);
+}
+
+/*
+ * Utility function to compare equality of vnodes.
+ * Compare the underlying real vnodes, if there are underlying vnodes.
+ * This is a more thorough comparison than the VN_CMP() macro provides.
+ */
+int
+vn_compare(vnode_t *vp1, vnode_t *vp2)
+{
+	vnode_t *realvp;
+
+	if (vp1 != NULL && VOP_REALVP(vp1, &realvp, NULL) == 0)
+		vp1 = realvp;
+	if (vp2 != NULL && VOP_REALVP(vp2, &realvp, NULL) == 0)
+		vp2 = realvp;
+	return (VN_CMP(vp1, vp2));
+}
+
+/*
+ * The number of locks to hash into.  This value must be a power
+ * of 2 minus 1 and should probably also be prime.
+ */
+#define	NUM_BUCKETS	1023
+
+struct  vn_vfslocks_bucket {
+	kmutex_t vb_lock;
+	vn_vfslocks_entry_t *vb_list;
+	char pad[64 - sizeof (kmutex_t) - sizeof (void *)];
+};
+
+/*
+ * Total number of buckets will be NUM_BUCKETS + 1 .
+ */
+
+#pragma	align	64(vn_vfslocks_buckets)
+static	struct vn_vfslocks_bucket	vn_vfslocks_buckets[NUM_BUCKETS + 1];
+
+#define	VN_VFSLOCKS_SHIFT	9
+
+#define	VN_VFSLOCKS_HASH(vfsvpptr)	\
+	((((intptr_t)(vfsvpptr)) >> VN_VFSLOCKS_SHIFT) & NUM_BUCKETS)
+
+/*
+ * vn_vfslocks_getlock() uses an HASH scheme to generate
+ * rwstlock using vfs/vnode pointer passed to it.
+ *
+ * vn_vfslocks_rele() releases a reference in the
+ * HASH table which allows the entry allocated by
+ * vn_vfslocks_getlock() to be freed at a later
+ * stage when the refcount drops to zero.
+ */
+
+vn_vfslocks_entry_t *
+vn_vfslocks_getlock(void *vfsvpptr)
+{
+	struct vn_vfslocks_bucket *bp;
+	vn_vfslocks_entry_t *vep;
+	vn_vfslocks_entry_t *tvep;
+
+	ASSERT(vfsvpptr != NULL);
+	bp = &vn_vfslocks_buckets[VN_VFSLOCKS_HASH(vfsvpptr)];
+
+	mutex_enter(&bp->vb_lock);
+	for (vep = bp->vb_list; vep != NULL; vep = vep->ve_next) {
+		if (vep->ve_vpvfs == vfsvpptr) {
+			vep->ve_refcnt++;
+			mutex_exit(&bp->vb_lock);
+			return (vep);
+		}
+	}
+	mutex_exit(&bp->vb_lock);
+	vep = kmem_alloc(sizeof (*vep), KM_SLEEP);
+	rwst_init(&vep->ve_lock, NULL, RW_DEFAULT, NULL);
+	vep->ve_vpvfs = (char *)vfsvpptr;
+	vep->ve_refcnt = 1;
+	mutex_enter(&bp->vb_lock);
+	for (tvep = bp->vb_list; tvep != NULL; tvep = tvep->ve_next) {
+		if (tvep->ve_vpvfs == vfsvpptr) {
+			tvep->ve_refcnt++;
+			mutex_exit(&bp->vb_lock);
+
+			/*
+			 * There is already an entry in the hash
+			 * destroy what we just allocated.
+			 */
+			rwst_destroy(&vep->ve_lock);
+			kmem_free(vep, sizeof (*vep));
+			return (tvep);
+		}
+	}
+	vep->ve_next = bp->vb_list;
+	bp->vb_list = vep;
+	mutex_exit(&bp->vb_lock);
+	return (vep);
+}
+
+void
+vn_vfslocks_rele(vn_vfslocks_entry_t *vepent)
+{
+	struct vn_vfslocks_bucket *bp;
+	vn_vfslocks_entry_t *vep;
+	vn_vfslocks_entry_t *pvep;
+
+	ASSERT(vepent != NULL);
+	ASSERT(vepent->ve_vpvfs != NULL);
+
+	bp = &vn_vfslocks_buckets[VN_VFSLOCKS_HASH(vepent->ve_vpvfs)];
+
+	mutex_enter(&bp->vb_lock);
+	vepent->ve_refcnt--;
+
+	if ((int32_t)vepent->ve_refcnt < 0)
+		cmn_err(CE_PANIC, "vn_vfslocks_rele: refcount negative");
+
+	if (vepent->ve_refcnt == 0) {
+		for (vep = bp->vb_list; vep != NULL; vep = vep->ve_next) {
+			if (vep->ve_vpvfs == vepent->ve_vpvfs) {
+				if (bp->vb_list == vep)
+					bp->vb_list = vep->ve_next;
+				else {
+					/* LINTED */
+					pvep->ve_next = vep->ve_next;
+				}
+				mutex_exit(&bp->vb_lock);
+				rwst_destroy(&vep->ve_lock);
+				kmem_free(vep, sizeof (*vep));
+				return;
+			}
+			pvep = vep;
+		}
+		cmn_err(CE_PANIC, "vn_vfslocks_rele: vp/vfs not found");
+	}
+	mutex_exit(&bp->vb_lock);
+}
+
+/*
+ * vn_vfswlock_wait is used to implement a lock which is logically a writers
+ * lock protecting the v_vfsmountedhere field.
+ * vn_vfswlock_wait has been modified to be similar to vn_vfswlock,
+ * except that it blocks to acquire the lock VVFSLOCK.
+ *
+ * traverse() and routines re-implementing part of traverse (e.g. autofs)
+ * need to hold this lock. mount(), vn_rename(), vn_remove() and so on
+ * need the non-blocking version of the writers lock i.e. vn_vfswlock
+ */
+int
+vn_vfswlock_wait(vnode_t *vp)
+{
+	int retval;
+	vn_vfslocks_entry_t *vpvfsentry;
+	ASSERT(vp != NULL);
+
+	vpvfsentry = vn_vfslocks_getlock(vp);
+	retval = rwst_enter_sig(&vpvfsentry->ve_lock, RW_WRITER);
+
+	if (retval == EINTR) {
+		vn_vfslocks_rele(vpvfsentry);
+		return (EINTR);
+	}
+	return (retval);
+}
+
+int
+vn_vfsrlock_wait(vnode_t *vp)
+{
+	int retval;
+	vn_vfslocks_entry_t *vpvfsentry;
+	ASSERT(vp != NULL);
+
+	vpvfsentry = vn_vfslocks_getlock(vp);
+	retval = rwst_enter_sig(&vpvfsentry->ve_lock, RW_READER);
+
+	if (retval == EINTR) {
+		vn_vfslocks_rele(vpvfsentry);
+		return (EINTR);
+	}
+
+	return (retval);
+}
+
+
+/*
+ * vn_vfswlock is used to implement a lock which is logically a writers lock
+ * protecting the v_vfsmountedhere field.
+ */
+int
+vn_vfswlock(vnode_t *vp)
+{
+	vn_vfslocks_entry_t *vpvfsentry;
+
+	/*
+	 * If vp is NULL then somebody is trying to lock the covered vnode
+	 * of /.  (vfs_vnodecovered is NULL for /).  This situation will
+	 * only happen when unmounting /.  Since that operation will fail
+	 * anyway, return EBUSY here instead of in VFS_UNMOUNT.
+	 */
+	if (vp == NULL)
+		return (EBUSY);
+
+	vpvfsentry = vn_vfslocks_getlock(vp);
+
+	if (rwst_tryenter(&vpvfsentry->ve_lock, RW_WRITER))
+		return (0);
+
+	vn_vfslocks_rele(vpvfsentry);
+	return (EBUSY);
+}
+
+int
+vn_vfsrlock(vnode_t *vp)
+{
+	vn_vfslocks_entry_t *vpvfsentry;
+
+	/*
+	 * If vp is NULL then somebody is trying to lock the covered vnode
+	 * of /.  (vfs_vnodecovered is NULL for /).  This situation will
+	 * only happen when unmounting /.  Since that operation will fail
+	 * anyway, return EBUSY here instead of in VFS_UNMOUNT.
+	 */
+	if (vp == NULL)
+		return (EBUSY);
+
+	vpvfsentry = vn_vfslocks_getlock(vp);
+
+	if (rwst_tryenter(&vpvfsentry->ve_lock, RW_READER))
+		return (0);
+
+	vn_vfslocks_rele(vpvfsentry);
+	return (EBUSY);
+}
+
+void
+vn_vfsunlock(vnode_t *vp)
+{
+	vn_vfslocks_entry_t *vpvfsentry;
+
+	/*
+	 * ve_refcnt needs to be decremented twice.
+	 * 1. To release refernce after a call to vn_vfslocks_getlock()
+	 * 2. To release the reference from the locking routines like
+	 *    vn_vfsrlock/vn_vfswlock etc,.
+	 */
+	vpvfsentry = vn_vfslocks_getlock(vp);
+	vn_vfslocks_rele(vpvfsentry);
+
+	rwst_exit(&vpvfsentry->ve_lock);
+	vn_vfslocks_rele(vpvfsentry);
+}
+
+int
+vn_vfswlock_held(vnode_t *vp)
+{
+	int held;
+	vn_vfslocks_entry_t *vpvfsentry;
+
+	ASSERT(vp != NULL);
+
+	vpvfsentry = vn_vfslocks_getlock(vp);
+	held = rwst_lock_held(&vpvfsentry->ve_lock, RW_WRITER);
+
+	vn_vfslocks_rele(vpvfsentry);
+	return (held);
+}
+
+
+int
+vn_make_ops(
+	const char *name,			/* Name of file system */
+	const fs_operation_def_t *templ,	/* Operation specification */
+	vnodeops_t **actual)			/* Return the vnodeops */
+{
+	int unused_ops;
+	int error;
+
+	*actual = (vnodeops_t *)kmem_alloc(sizeof (vnodeops_t), KM_SLEEP);
+
+	(*actual)->vnop_name = name;
+
+	error = fs_build_vector(*actual, &unused_ops, vn_ops_table, templ);
+	if (error) {
+		kmem_free(*actual, sizeof (vnodeops_t));
+	}
+
+#if DEBUG
+	if (unused_ops != 0)
+		cmn_err(CE_WARN, "vn_make_ops: %s: %d operations supplied "
+		    "but not used", name, unused_ops);
+#endif
+
+	return (error);
+}
+
+/*
+ * Free the vnodeops created as a result of vn_make_ops()
+ */
+void
+vn_freevnodeops(vnodeops_t *vnops)
+{
+	kmem_free(vnops, sizeof (vnodeops_t));
+}
+
+/*
+ * Vnode cache.
+ */
+
+/* ARGSUSED */
+static int
+vn_cache_constructor(void *buf, void *cdrarg, int kmflags)
+{
+	struct vnode *vp;
+
+	vp = buf;
+
+	mutex_init(&vp->v_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&vp->v_vsd_lock, NULL, MUTEX_DEFAULT, NULL);
+	cv_init(&vp->v_cv, NULL, CV_DEFAULT, NULL);
+	rw_init(&vp->v_nbllock, NULL, RW_DEFAULT, NULL);
+	vp->v_femhead = NULL;	/* Must be done before vn_reinit() */
+	vp->v_path = NULL;
+	vp->v_mpssdata = NULL;
+	vp->v_vsd = NULL;
+	vp->v_fopdata = NULL;
+
+	return (0);
+}
+
+/* ARGSUSED */
+static void
+vn_cache_destructor(void *buf, void *cdrarg)
+{
+	struct vnode *vp;
+
+	vp = buf;
+
+	rw_destroy(&vp->v_nbllock);
+	cv_destroy(&vp->v_cv);
+	mutex_destroy(&vp->v_vsd_lock);
+	mutex_destroy(&vp->v_lock);
+}
+
+void
+vn_create_cache(void)
+{
+	/* LINTED */
+	ASSERT((1 << VNODE_ALIGN_LOG2) ==
+	    P2ROUNDUP(sizeof (struct vnode), VNODE_ALIGN));
+	vn_cache = kmem_cache_create("vn_cache", sizeof (struct vnode),
+	    VNODE_ALIGN, vn_cache_constructor, vn_cache_destructor, NULL, NULL,
+	    NULL, 0);
+}
+
+void
+vn_destroy_cache(void)
+{
+	kmem_cache_destroy(vn_cache);
+}
+
+/*
+ * Used by file systems when fs-specific nodes (e.g., ufs inodes) are
+ * cached by the file system and vnodes remain associated.
+ */
+void
+vn_recycle(vnode_t *vp)
+{
+	ASSERT(vp->v_pages == NULL);
+
+	/*
+	 * XXX - This really belongs in vn_reinit(), but we have some issues
+	 * with the counts.  Best to have it here for clean initialization.
+	 */
+	vp->v_rdcnt = 0;
+	vp->v_wrcnt = 0;
+	vp->v_mmap_read = 0;
+	vp->v_mmap_write = 0;
+
+	/*
+	 * If FEM was in use, make sure everything gets cleaned up
+	 * NOTE: vp->v_femhead is initialized to NULL in the vnode
+	 * constructor.
+	 */
+	if (vp->v_femhead) {
+		/* XXX - There should be a free_femhead() that does all this */
+		ASSERT(vp->v_femhead->femh_list == NULL);
+		mutex_destroy(&vp->v_femhead->femh_lock);
+		kmem_free(vp->v_femhead, sizeof (*(vp->v_femhead)));
+		vp->v_femhead = NULL;
+	}
+	if (vp->v_path) {
+		kmem_free(vp->v_path, strlen(vp->v_path) + 1);
+		vp->v_path = NULL;
+	}
+
+	if (vp->v_fopdata != NULL) {
+		free_fopdata(vp);
+	}
+	vp->v_mpssdata = NULL;
+	vsd_free(vp);
+}
+
+/*
+ * Used to reset the vnode fields including those that are directly accessible
+ * as well as those which require an accessor function.
+ *
+ * Does not initialize:
+ *	synchronization objects: v_lock, v_vsd_lock, v_nbllock, v_cv
+ *	v_data (since FS-nodes and vnodes point to each other and should
+ *		be updated simultaneously)
+ *	v_op (in case someone needs to make a VOP call on this object)
+ */
+void
+vn_reinit(vnode_t *vp)
+{
+	vp->v_count = 1;
+	vp->v_count_dnlc = 0;
+	vp->v_vfsp = NULL;
+	vp->v_stream = NULL;
+	vp->v_vfsmountedhere = NULL;
+	vp->v_flag = 0;
+	vp->v_type = VNON;
+	vp->v_rdev = NODEV;
+
+	vp->v_filocks = NULL;
+	vp->v_shrlocks = NULL;
+	vp->v_pages = NULL;
+
+	vp->v_locality = NULL;
+	vp->v_xattrdir = NULL;
+
+	/* Handles v_femhead, v_path, and the r/w/map counts */
+	vn_recycle(vp);
+}
+
+vnode_t *
+vn_alloc(int kmflag)
+{
+	vnode_t *vp;
+
+	vp = kmem_cache_alloc(vn_cache, kmflag);
+
+	if (vp != NULL) {
+		vp->v_femhead = NULL;	/* Must be done before vn_reinit() */
+		vp->v_fopdata = NULL;
+		vn_reinit(vp);
+	}
+
+	return (vp);
+}
+
+void
+vn_free(vnode_t *vp)
+{
+	ASSERT(vp->v_shrlocks == NULL);
+	ASSERT(vp->v_filocks == NULL);
+
+	/*
+	 * Some file systems call vn_free() with v_count of zero,
+	 * some with v_count of 1.  In any case, the value should
+	 * never be anything else.
+	 */
+	ASSERT((vp->v_count == 0) || (vp->v_count == 1));
+	ASSERT(vp->v_count_dnlc == 0);
+	if (vp->v_path != NULL) {
+		kmem_free(vp->v_path, strlen(vp->v_path) + 1);
+		vp->v_path = NULL;
+	}
+
+	/* If FEM was in use, make sure everything gets cleaned up */
+	if (vp->v_femhead) {
+		/* XXX - There should be a free_femhead() that does all this */
+		ASSERT(vp->v_femhead->femh_list == NULL);
+		mutex_destroy(&vp->v_femhead->femh_lock);
+		kmem_free(vp->v_femhead, sizeof (*(vp->v_femhead)));
+		vp->v_femhead = NULL;
+	}
+
+	if (vp->v_fopdata != NULL) {
+		free_fopdata(vp);
+	}
+	vp->v_mpssdata = NULL;
+	vsd_free(vp);
+	kmem_cache_free(vn_cache, vp);
+}
+
+/*
+ * vnode status changes, should define better states than 1, 0.
+ */
+void
+vn_reclaim(vnode_t *vp)
+{
+	vfs_t   *vfsp = vp->v_vfsp;
+
+	if (vfsp == NULL ||
+	    vfsp->vfs_implp == NULL || vfsp->vfs_femhead == NULL) {
+		return;
+	}
+	(void) VFS_VNSTATE(vfsp, vp, VNTRANS_RECLAIMED);
+}
+
+void
+vn_idle(vnode_t *vp)
+{
+	vfs_t   *vfsp = vp->v_vfsp;
+
+	if (vfsp == NULL ||
+	    vfsp->vfs_implp == NULL || vfsp->vfs_femhead == NULL) {
+		return;
+	}
+	(void) VFS_VNSTATE(vfsp, vp, VNTRANS_IDLED);
+}
+void
+vn_exists(vnode_t *vp)
+{
+	vfs_t   *vfsp = vp->v_vfsp;
+
+	if (vfsp == NULL ||
+	    vfsp->vfs_implp == NULL || vfsp->vfs_femhead == NULL) {
+		return;
+	}
+	(void) VFS_VNSTATE(vfsp, vp, VNTRANS_EXISTS);
+}
+
+void
+vn_invalid(vnode_t *vp)
+{
+	vfs_t   *vfsp = vp->v_vfsp;
+
+	if (vfsp == NULL ||
+	    vfsp->vfs_implp == NULL || vfsp->vfs_femhead == NULL) {
+		return;
+	}
+	(void) VFS_VNSTATE(vfsp, vp, VNTRANS_DESTROYED);
+}
+
+/* Vnode event notification */
+
+int
+vnevent_support(vnode_t *vp, caller_context_t *ct)
+{
+	if (vp == NULL)
+		return (EINVAL);
+
+	return (VOP_VNEVENT(vp, VE_SUPPORT, NULL, NULL, ct));
+}
+
+void
+vnevent_rename_src(vnode_t *vp, vnode_t *dvp, char *name, caller_context_t *ct)
+{
+	if (vp == NULL || vp->v_femhead == NULL) {
+		return;
+	}
+	(void) VOP_VNEVENT(vp, VE_RENAME_SRC, dvp, name, ct);
+}
+
+void
+vnevent_rename_dest(vnode_t *vp, vnode_t *dvp, char *name,
+    caller_context_t *ct)
+{
+	if (vp == NULL || vp->v_femhead == NULL) {
+		return;
+	}
+	(void) VOP_VNEVENT(vp, VE_RENAME_DEST, dvp, name, ct);
+}
+
+void
+vnevent_rename_dest_dir(vnode_t *vp, caller_context_t *ct)
+{
+	if (vp == NULL || vp->v_femhead == NULL) {
+		return;
+	}
+	(void) VOP_VNEVENT(vp, VE_RENAME_DEST_DIR, NULL, NULL, ct);
+}
+
+void
+vnevent_remove(vnode_t *vp, vnode_t *dvp, char *name, caller_context_t *ct)
+{
+	if (vp == NULL || vp->v_femhead == NULL) {
+		return;
+	}
+	(void) VOP_VNEVENT(vp, VE_REMOVE, dvp, name, ct);
+}
+
+void
+vnevent_rmdir(vnode_t *vp, vnode_t *dvp, char *name, caller_context_t *ct)
+{
+	if (vp == NULL || vp->v_femhead == NULL) {
+		return;
+	}
+	(void) VOP_VNEVENT(vp, VE_RMDIR, dvp, name, ct);
+}
+
+void
+vnevent_create(vnode_t *vp, caller_context_t *ct)
+{
+	if (vp == NULL || vp->v_femhead == NULL) {
+		return;
+	}
+	(void) VOP_VNEVENT(vp, VE_CREATE, NULL, NULL, ct);
+}
+
+void
+vnevent_link(vnode_t *vp, caller_context_t *ct)
+{
+	if (vp == NULL || vp->v_femhead == NULL) {
+		return;
+	}
+	(void) VOP_VNEVENT(vp, VE_LINK, NULL, NULL, ct);
+}
+
+void
+vnevent_mountedover(vnode_t *vp, caller_context_t *ct)
+{
+	if (vp == NULL || vp->v_femhead == NULL) {
+		return;
+	}
+	(void) VOP_VNEVENT(vp, VE_MOUNTEDOVER, NULL, NULL, ct);
+}
+
+/*
+ * Vnode accessors.
+ */
+
+int
+vn_is_readonly(vnode_t *vp)
+{
+	return (vp->v_vfsp->vfs_flag & VFS_RDONLY);
+}
+
+int
+vn_has_flocks(vnode_t *vp)
+{
+	return (vp->v_filocks != NULL);
+}
+
+int
+vn_has_mandatory_locks(vnode_t *vp, int mode)
+{
+	return ((vp->v_filocks != NULL) && (MANDLOCK(vp, mode)));
+}
+
+int
+vn_has_cached_data(vnode_t *vp)
+{
+	return (vp->v_pages != NULL);
+}
+
+/*
+ * Return 0 if the vnode in question shouldn't be permitted into a zone via
+ * zone_enter(2).
+ */
+int
+vn_can_change_zones(vnode_t *vp)
+{
+	struct vfssw *vswp;
+	int allow = 1;
+	vnode_t *rvp;
+
+	if (nfs_global_client_only != 0)
+		return (1);
+
+	/*
+	 * We always want to look at the underlying vnode if there is one.
+	 */
+	if (VOP_REALVP(vp, &rvp, NULL) != 0)
+		rvp = vp;
+	/*
+	 * Some pseudo filesystems (including doorfs) don't actually register
+	 * their vfsops_t, so the following may return NULL; we happily let
+	 * such vnodes switch zones.
+	 */
+	vswp = vfs_getvfsswbyvfsops(vfs_getops(rvp->v_vfsp));
+	if (vswp != NULL) {
+		if (vswp->vsw_flag & VSW_NOTZONESAFE)
+			allow = 0;
+		vfs_unrefvfssw(vswp);
+	}
+	return (allow);
+}
+
+/*
+ * Return nonzero if the vnode is a mount point, zero if not.
+ */
+int
+vn_ismntpt(vnode_t *vp)
+{
+	return (vp->v_vfsmountedhere != NULL);
+}
+
+/* Retrieve the vfs (if any) mounted on this vnode */
+vfs_t *
+vn_mountedvfs(vnode_t *vp)
+{
+	return (vp->v_vfsmountedhere);
+}
+
+/*
+ * Return nonzero if the vnode is referenced by the dnlc, zero if not.
+ */
+int
+vn_in_dnlc(vnode_t *vp)
+{
+	return (vp->v_count_dnlc > 0);
+}
+
+/*
+ * vn_has_other_opens() checks whether a particular file is opened by more than
+ * just the caller and whether the open is for read and/or write.
+ * This routine is for calling after the caller has already called VOP_OPEN()
+ * and the caller wishes to know if they are the only one with it open for
+ * the mode(s) specified.
+ *
+ * Vnode counts are only kept on regular files (v_type=VREG).
+ */
+int
+vn_has_other_opens(
+	vnode_t *vp,
+	v_mode_t mode)
+{
+
+	ASSERT(vp != NULL);
+
+	switch (mode) {
+	case V_WRITE:
+		if (vp->v_wrcnt > 1)
+			return (V_TRUE);
+		break;
+	case V_RDORWR:
+		if ((vp->v_rdcnt > 1) || (vp->v_wrcnt > 1))
+			return (V_TRUE);
+		break;
+	case V_RDANDWR:
+		if ((vp->v_rdcnt > 1) && (vp->v_wrcnt > 1))
+			return (V_TRUE);
+		break;
+	case V_READ:
+		if (vp->v_rdcnt > 1)
+			return (V_TRUE);
+		break;
+	}
+
+	return (V_FALSE);
+}
+
+/*
+ * vn_is_opened() checks whether a particular file is opened and
+ * whether the open is for read and/or write.
+ *
+ * Vnode counts are only kept on regular files (v_type=VREG).
+ */
+int
+vn_is_opened(
+	vnode_t *vp,
+	v_mode_t mode)
+{
+
+	ASSERT(vp != NULL);
+
+	switch (mode) {
+	case V_WRITE:
+		if (vp->v_wrcnt)
+			return (V_TRUE);
+		break;
+	case V_RDANDWR:
+		if (vp->v_rdcnt && vp->v_wrcnt)
+			return (V_TRUE);
+		break;
+	case V_RDORWR:
+		if (vp->v_rdcnt || vp->v_wrcnt)
+			return (V_TRUE);
+		break;
+	case V_READ:
+		if (vp->v_rdcnt)
+			return (V_TRUE);
+		break;
+	}
+
+	return (V_FALSE);
+}
+
+/*
+ * vn_is_mapped() checks whether a particular file is mapped and whether
+ * the file is mapped read and/or write.
+ */
+int
+vn_is_mapped(
+	vnode_t *vp,
+	v_mode_t mode)
+{
+
+	ASSERT(vp != NULL);
+
+#if !defined(_LP64)
+	switch (mode) {
+	/*
+	 * The atomic_add_64_nv functions force atomicity in the
+	 * case of 32 bit architectures. Otherwise the 64 bit values
+	 * require two fetches. The value of the fields may be
+	 * (potentially) changed between the first fetch and the
+	 * second
+	 */
+	case V_WRITE:
+		if (atomic_add_64_nv((&(vp->v_mmap_write)), 0))
+			return (V_TRUE);
+		break;
+	case V_RDANDWR:
+		if ((atomic_add_64_nv((&(vp->v_mmap_read)), 0)) &&
+		    (atomic_add_64_nv((&(vp->v_mmap_write)), 0)))
+			return (V_TRUE);
+		break;
+	case V_RDORWR:
+		if ((atomic_add_64_nv((&(vp->v_mmap_read)), 0)) ||
+		    (atomic_add_64_nv((&(vp->v_mmap_write)), 0)))
+			return (V_TRUE);
+		break;
+	case V_READ:
+		if (atomic_add_64_nv((&(vp->v_mmap_read)), 0))
+			return (V_TRUE);
+		break;
+	}
+#else
+	switch (mode) {
+	case V_WRITE:
+		if (vp->v_mmap_write)
+			return (V_TRUE);
+		break;
+	case V_RDANDWR:
+		if (vp->v_mmap_read && vp->v_mmap_write)
+			return (V_TRUE);
+		break;
+	case V_RDORWR:
+		if (vp->v_mmap_read || vp->v_mmap_write)
+			return (V_TRUE);
+		break;
+	case V_READ:
+		if (vp->v_mmap_read)
+			return (V_TRUE);
+		break;
+	}
+#endif
+
+	return (V_FALSE);
+}
+
+/*
+ * Set the operations vector for a vnode.
+ *
+ * FEM ensures that the v_femhead pointer is filled in before the
+ * v_op pointer is changed.  This means that if the v_femhead pointer
+ * is NULL, and the v_op field hasn't changed since before which checked
+ * the v_femhead pointer; then our update is ok - we are not racing with
+ * FEM.
+ */
+void
+vn_setops(vnode_t *vp, vnodeops_t *vnodeops)
+{
+	vnodeops_t	*op;
+
+	ASSERT(vp != NULL);
+	ASSERT(vnodeops != NULL);
+
+	op = vp->v_op;
+	membar_consumer();
+	/*
+	 * If vp->v_femhead == NULL, then we'll call casptr() to do the
+	 * compare-and-swap on vp->v_op.  If either fails, then FEM is
+	 * in effect on the vnode and we need to have FEM deal with it.
+	 */
+	if (vp->v_femhead != NULL || casptr(&vp->v_op, op, vnodeops) != op) {
+		fem_setvnops(vp, vnodeops);
+	}
+}
+
+/*
+ * Retrieve the operations vector for a vnode
+ * As with vn_setops(above); make sure we aren't racing with FEM.
+ * FEM sets the v_op to a special, internal, vnodeops that wouldn't
+ * make sense to the callers of this routine.
+ */
+vnodeops_t *
+vn_getops(vnode_t *vp)
+{
+	vnodeops_t	*op;
+
+	ASSERT(vp != NULL);
+
+	op = vp->v_op;
+	membar_consumer();
+	if (vp->v_femhead == NULL && op == vp->v_op) {
+		return (op);
+	} else {
+		return (fem_getvnops(vp));
+	}
+}
+
+/*
+ * Returns non-zero (1) if the vnodeops matches that of the vnode.
+ * Returns zero (0) if not.
+ */
+int
+vn_matchops(vnode_t *vp, vnodeops_t *vnodeops)
+{
+	return (vn_getops(vp) == vnodeops);
+}
+
+/*
+ * Returns non-zero (1) if the specified operation matches the
+ * corresponding operation for that the vnode.
+ * Returns zero (0) if not.
+ */
+
+#define	MATCHNAME(n1, n2) (((n1)[0] == (n2)[0]) && (strcmp((n1), (n2)) == 0))
+
+int
+vn_matchopval(vnode_t *vp, char *vopname, fs_generic_func_p funcp)
+{
+	const fs_operation_trans_def_t *otdp;
+	fs_generic_func_p *loc = NULL;
+	vnodeops_t	*vop = vn_getops(vp);
+
+	ASSERT(vopname != NULL);
+
+	for (otdp = vn_ops_table; otdp->name != NULL; otdp++) {
+		if (MATCHNAME(otdp->name, vopname)) {
+			loc = (fs_generic_func_p *)
+			    ((char *)(vop) + otdp->offset);
+			break;
+		}
+	}
+
+	return ((loc != NULL) && (*loc == funcp));
+}
+
+/*
+ * fs_new_caller_id() needs to return a unique ID on a given local system.
+ * The IDs do not need to survive across reboots.  These are primarily
+ * used so that (FEM) monitors can detect particular callers (such as
+ * the NFS server) to a given vnode/vfs operation.
+ */
+u_longlong_t
+fs_new_caller_id()
+{
+	static uint64_t next_caller_id = 0LL; /* First call returns 1 */
+
+	return ((u_longlong_t)atomic_add_64_nv(&next_caller_id, 1));
+}
+
+/*
+ * Given a starting vnode and a path, updates the path in the target vnode in
+ * a safe manner.  If the vnode already has path information embedded, then the
+ * cached path is left untouched.
+ */
+
+size_t max_vnode_path = 4 * MAXPATHLEN;
+
+void
+vn_setpath(vnode_t *rootvp, struct vnode *startvp, struct vnode *vp,
+    const char *path, size_t plen)
+{
+	char	*rpath;
+	vnode_t	*base;
+	size_t	rpathlen, rpathalloc;
+	int	doslash = 1;
+
+	if (*path == '/') {
+		base = rootvp;
+		path++;
+		plen--;
+	} else {
+		base = startvp;
+	}
+
+	/*
+	 * We cannot grab base->v_lock while we hold vp->v_lock because of
+	 * the potential for deadlock.
+	 */
+	mutex_enter(&base->v_lock);
+	if (base->v_path == NULL) {
+		mutex_exit(&base->v_lock);
+		return;
+	}
+
+	rpathlen = strlen(base->v_path);
+	rpathalloc = rpathlen + plen + 1;
+	/* Avoid adding a slash if there's already one there */
+	if (base->v_path[rpathlen-1] == '/')
+		doslash = 0;
+	else
+		rpathalloc++;
+
+	/*
+	 * We don't want to call kmem_alloc(KM_SLEEP) with kernel locks held,
+	 * so we must do this dance.  If, by chance, something changes the path,
+	 * just give up since there is no real harm.
+	 */
+	mutex_exit(&base->v_lock);
+
+	/* Paths should stay within reason */
+	if (rpathalloc > max_vnode_path)
+		return;
+
+	rpath = kmem_alloc(rpathalloc, KM_SLEEP);
+
+	mutex_enter(&base->v_lock);
+	if (base->v_path == NULL || strlen(base->v_path) != rpathlen) {
+		mutex_exit(&base->v_lock);
+		kmem_free(rpath, rpathalloc);
+		return;
+	}
+	bcopy(base->v_path, rpath, rpathlen);
+	mutex_exit(&base->v_lock);
+
+	if (doslash)
+		rpath[rpathlen++] = '/';
+	bcopy(path, rpath + rpathlen, plen);
+	rpath[rpathlen + plen] = '\0';
+
+	mutex_enter(&vp->v_lock);
+	if (vp->v_path != NULL) {
+		mutex_exit(&vp->v_lock);
+		kmem_free(rpath, rpathalloc);
+	} else {
+		vp->v_path = rpath;
+		mutex_exit(&vp->v_lock);
+	}
+}
+
+/*
+ * Sets the path to the vnode to be the given string, regardless of current
+ * context.  The string must be a complete path from rootdir.  This is only used
+ * by fsop_root() for setting the path based on the mountpoint.
+ */
+void
+vn_setpath_str(struct vnode *vp, const char *str, size_t len)
+{
+	char *buf = kmem_alloc(len + 1, KM_SLEEP);
+
+	mutex_enter(&vp->v_lock);
+	if (vp->v_path != NULL) {
+		mutex_exit(&vp->v_lock);
+		kmem_free(buf, len + 1);
+		return;
+	}
+
+	vp->v_path = buf;
+	bcopy(str, vp->v_path, len);
+	vp->v_path[len] = '\0';
+
+	mutex_exit(&vp->v_lock);
+}
+
+/*
+ * Called from within filesystem's vop_rename() to handle renames once the
+ * target vnode is available.
+ */
+void
+vn_renamepath(vnode_t *dvp, vnode_t *vp, const char *nm, size_t len)
+{
+	char *tmp;
+
+	mutex_enter(&vp->v_lock);
+	tmp = vp->v_path;
+	vp->v_path = NULL;
+	mutex_exit(&vp->v_lock);
+	vn_setpath(rootdir, dvp, vp, nm, len);
+	if (tmp != NULL)
+		kmem_free(tmp, strlen(tmp) + 1);
+}
+
+/*
+ * Similar to vn_setpath_str(), this function sets the path of the destination
+ * vnode to the be the same as the source vnode.
+ */
+void
+vn_copypath(struct vnode *src, struct vnode *dst)
+{
+	char *buf;
+	int alloc;
+
+	mutex_enter(&src->v_lock);
+	if (src->v_path == NULL) {
+		mutex_exit(&src->v_lock);
+		return;
+	}
+	alloc = strlen(src->v_path) + 1;
+
+	/* avoid kmem_alloc() with lock held */
+	mutex_exit(&src->v_lock);
+	buf = kmem_alloc(alloc, KM_SLEEP);
+	mutex_enter(&src->v_lock);
+	if (src->v_path == NULL || strlen(src->v_path) + 1 != alloc) {
+		mutex_exit(&src->v_lock);
+		kmem_free(buf, alloc);
+		return;
+	}
+	bcopy(src->v_path, buf, alloc);
+	mutex_exit(&src->v_lock);
+
+	mutex_enter(&dst->v_lock);
+	if (dst->v_path != NULL) {
+		mutex_exit(&dst->v_lock);
+		kmem_free(buf, alloc);
+		return;
+	}
+	dst->v_path = buf;
+	mutex_exit(&dst->v_lock);
+}
+
+/*
+ * XXX Private interface for segvn routines that handle vnode
+ * large page segments.
+ *
+ * return 1 if vp's file system VOP_PAGEIO() implementation
+ * can be safely used instead of VOP_GETPAGE() for handling
+ * pagefaults against regular non swap files. VOP_PAGEIO()
+ * interface is considered safe here if its implementation
+ * is very close to VOP_GETPAGE() implementation.
+ * e.g. It zero's out the part of the page beyond EOF. Doesn't
+ * panic if there're file holes but instead returns an error.
+ * Doesn't assume file won't be changed by user writes, etc.
+ *
+ * return 0 otherwise.
+ *
+ * For now allow segvn to only use VOP_PAGEIO() with ufs and nfs.
+ */
+int
+vn_vmpss_usepageio(vnode_t *vp)
+{
+	vfs_t   *vfsp = vp->v_vfsp;
+	char *fsname = vfssw[vfsp->vfs_fstype].vsw_name;
+	char *pageio_ok_fss[] = {"ufs", "nfs", NULL};
+	char **fsok = pageio_ok_fss;
+
+	if (fsname == NULL) {
+		return (0);
+	}
+
+	for (; *fsok; fsok++) {
+		if (strcmp(*fsok, fsname) == 0) {
+			return (1);
+		}
+	}
+	return (0);
+}
+
+/* VOP_XXX() macros call the corresponding fop_xxx() function */
+
+int
+fop_open(
+	vnode_t **vpp,
+	int mode,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int ret;
+	vnode_t *vp = *vpp;
+
+	VN_HOLD(vp);
+	/*
+	 * Adding to the vnode counts before calling open
+	 * avoids the need for a mutex. It circumvents a race
+	 * condition where a query made on the vnode counts results in a
+	 * false negative. The inquirer goes away believing the file is
+	 * not open when there is an open on the file already under way.
+	 *
+	 * The counts are meant to prevent NFS from granting a delegation
+	 * when it would be dangerous to do so.
+	 *
+	 * The vnode counts are only kept on regular files
+	 */
+	if ((*vpp)->v_type == VREG) {
+		if (mode & FREAD)
+			atomic_add_32(&((*vpp)->v_rdcnt), 1);
+		if (mode & FWRITE)
+			atomic_add_32(&((*vpp)->v_wrcnt), 1);
+	}
+
+	VOPXID_MAP_CR(vp, cr);
+
+	ret = (*(*(vpp))->v_op->vop_open)(vpp, mode, cr, ct);
+
+	if (ret) {
+		/*
+		 * Use the saved vp just in case the vnode ptr got trashed
+		 * by the error.
+		 */
+		VOPSTATS_UPDATE(vp, open);
+		if ((vp->v_type == VREG) && (mode & FREAD))
+			atomic_add_32(&(vp->v_rdcnt), -1);
+		if ((vp->v_type == VREG) && (mode & FWRITE))
+			atomic_add_32(&(vp->v_wrcnt), -1);
+	} else {
+		/*
+		 * Some filesystems will return a different vnode,
+		 * but the same path was still used to open it.
+		 * So if we do change the vnode and need to
+		 * copy over the path, do so here, rather than special
+		 * casing each filesystem. Adjust the vnode counts to
+		 * reflect the vnode switch.
+		 */
+		VOPSTATS_UPDATE(*vpp, open);
+		if (*vpp != vp && *vpp != NULL) {
+			vn_copypath(vp, *vpp);
+			if (((*vpp)->v_type == VREG) && (mode & FREAD))
+				atomic_add_32(&((*vpp)->v_rdcnt), 1);
+			if ((vp->v_type == VREG) && (mode & FREAD))
+				atomic_add_32(&(vp->v_rdcnt), -1);
+			if (((*vpp)->v_type == VREG) && (mode & FWRITE))
+				atomic_add_32(&((*vpp)->v_wrcnt), 1);
+			if ((vp->v_type == VREG) && (mode & FWRITE))
+				atomic_add_32(&(vp->v_wrcnt), -1);
+		}
+	}
+	VN_RELE(vp);
+	return (ret);
+}
+
+int
+fop_close(
+	vnode_t *vp,
+	int flag,
+	int count,
+	offset_t offset,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_close)(vp, flag, count, offset, cr, ct);
+	VOPSTATS_UPDATE(vp, close);
+	/*
+	 * Check passed in count to handle possible dups. Vnode counts are only
+	 * kept on regular files
+	 */
+	if ((vp->v_type == VREG) && (count == 1))  {
+		if (flag & FREAD) {
+			ASSERT(vp->v_rdcnt > 0);
+			atomic_add_32(&(vp->v_rdcnt), -1);
+		}
+		if (flag & FWRITE) {
+			ASSERT(vp->v_wrcnt > 0);
+			atomic_add_32(&(vp->v_wrcnt), -1);
+		}
+	}
+	return (err);
+}
+
+int
+fop_read(
+	vnode_t *vp,
+	uio_t *uiop,
+	int ioflag,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+	ssize_t	resid_start = uiop->uio_resid;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_read)(vp, uiop, ioflag, cr, ct);
+	VOPSTATS_UPDATE_IO(vp, read,
+	    read_bytes, (resid_start - uiop->uio_resid));
+	return (err);
+}
+
+int
+fop_write(
+	vnode_t *vp,
+	uio_t *uiop,
+	int ioflag,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+	ssize_t	resid_start = uiop->uio_resid;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_write)(vp, uiop, ioflag, cr, ct);
+	VOPSTATS_UPDATE_IO(vp, write,
+	    write_bytes, (resid_start - uiop->uio_resid));
+	return (err);
+}
+
+int
+fop_ioctl(
+	vnode_t *vp,
+	int cmd,
+	intptr_t arg,
+	int flag,
+	cred_t *cr,
+	int *rvalp,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_ioctl)(vp, cmd, arg, flag, cr, rvalp, ct);
+	VOPSTATS_UPDATE(vp, ioctl);
+	return (err);
+}
+
+int
+fop_setfl(
+	vnode_t *vp,
+	int oflags,
+	int nflags,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_setfl)(vp, oflags, nflags, cr, ct);
+	VOPSTATS_UPDATE(vp, setfl);
+	return (err);
+}
+
+int
+fop_getattr(
+	vnode_t *vp,
+	vattr_t *vap,
+	int flags,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	/*
+	 * If this file system doesn't understand the xvattr extensions
+	 * then turn off the xvattr bit.
+	 */
+	if (vfs_has_feature(vp->v_vfsp, VFSFT_XVATTR) == 0) {
+		vap->va_mask &= ~AT_XVATTR;
+	}
+
+	/*
+	 * We're only allowed to skip the ACL check iff we used a 32 bit
+	 * ACE mask with VOP_ACCESS() to determine permissions.
+	 */
+	if ((flags & ATTR_NOACLCHECK) &&
+	    vfs_has_feature(vp->v_vfsp, VFSFT_ACEMASKONACCESS) == 0) {
+		return (EINVAL);
+	}
+	err = (*(vp)->v_op->vop_getattr)(vp, vap, flags, cr, ct);
+	VOPSTATS_UPDATE(vp, getattr);
+	return (err);
+}
+
+int
+fop_setattr(
+	vnode_t *vp,
+	vattr_t *vap,
+	int flags,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	/*
+	 * If this file system doesn't understand the xvattr extensions
+	 * then turn off the xvattr bit.
+	 */
+	if (vfs_has_feature(vp->v_vfsp, VFSFT_XVATTR) == 0) {
+		vap->va_mask &= ~AT_XVATTR;
+	}
+
+	/*
+	 * We're only allowed to skip the ACL check iff we used a 32 bit
+	 * ACE mask with VOP_ACCESS() to determine permissions.
+	 */
+	if ((flags & ATTR_NOACLCHECK) &&
+	    vfs_has_feature(vp->v_vfsp, VFSFT_ACEMASKONACCESS) == 0) {
+		return (EINVAL);
+	}
+	err = (*(vp)->v_op->vop_setattr)(vp, vap, flags, cr, ct);
+	VOPSTATS_UPDATE(vp, setattr);
+	return (err);
+}
+
+int
+fop_access(
+	vnode_t *vp,
+	int mode,
+	int flags,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	if ((flags & V_ACE_MASK) &&
+	    vfs_has_feature(vp->v_vfsp, VFSFT_ACEMASKONACCESS) == 0) {
+		return (EINVAL);
+	}
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_access)(vp, mode, flags, cr, ct);
+	VOPSTATS_UPDATE(vp, access);
+	return (err);
+}
+
+int
+fop_lookup(
+	vnode_t *dvp,
+	char *nm,
+	vnode_t **vpp,
+	pathname_t *pnp,
+	int flags,
+	vnode_t *rdir,
+	cred_t *cr,
+	caller_context_t *ct,
+	int *deflags,		/* Returned per-dirent flags */
+	pathname_t *ppnp)	/* Returned case-preserved name in directory */
+{
+	int ret;
+
+	/*
+	 * If this file system doesn't support case-insensitive access
+	 * and said access is requested, fail quickly.  It is required
+	 * that if the vfs supports case-insensitive lookup, it also
+	 * supports extended dirent flags.
+	 */
+	if (flags & FIGNORECASE &&
+	    (vfs_has_feature(dvp->v_vfsp, VFSFT_CASEINSENSITIVE) == 0 &&
+	    vfs_has_feature(dvp->v_vfsp, VFSFT_NOCASESENSITIVE) == 0))
+		return (EINVAL);
+
+	VOPXID_MAP_CR(dvp, cr);
+
+	if ((flags & LOOKUP_XATTR) && (flags & LOOKUP_HAVE_SYSATTR_DIR) == 0) {
+		ret = xattr_dir_lookup(dvp, vpp, flags, cr);
+	} else {
+		ret = (*(dvp)->v_op->vop_lookup)
+		    (dvp, nm, vpp, pnp, flags, rdir, cr, ct, deflags, ppnp);
+	}
+	if (ret == 0 && *vpp) {
+		VOPSTATS_UPDATE(*vpp, lookup);
+		if ((*vpp)->v_path == NULL) {
+			vn_setpath(rootdir, dvp, *vpp, nm, strlen(nm));
+		}
+	}
+
+	return (ret);
+}
+
+int
+fop_create(
+	vnode_t *dvp,
+	char *name,
+	vattr_t *vap,
+	vcexcl_t excl,
+	int mode,
+	vnode_t **vpp,
+	cred_t *cr,
+	int flags,
+	caller_context_t *ct,
+	vsecattr_t *vsecp)	/* ACL to set during create */
+{
+	int ret;
+
+	if (vsecp != NULL &&
+	    vfs_has_feature(dvp->v_vfsp, VFSFT_ACLONCREATE) == 0) {
+		return (EINVAL);
+	}
+	/*
+	 * If this file system doesn't support case-insensitive access
+	 * and said access is requested, fail quickly.
+	 */
+	if (flags & FIGNORECASE &&
+	    (vfs_has_feature(dvp->v_vfsp, VFSFT_CASEINSENSITIVE) == 0 &&
+	    vfs_has_feature(dvp->v_vfsp, VFSFT_NOCASESENSITIVE) == 0))
+		return (EINVAL);
+
+	VOPXID_MAP_CR(dvp, cr);
+
+	ret = (*(dvp)->v_op->vop_create)
+	    (dvp, name, vap, excl, mode, vpp, cr, flags, ct, vsecp);
+	if (ret == 0 && *vpp) {
+		VOPSTATS_UPDATE(*vpp, create);
+		if ((*vpp)->v_path == NULL) {
+			vn_setpath(rootdir, dvp, *vpp, name, strlen(name));
+		}
+	}
+
+	return (ret);
+}
+
+int
+fop_remove(
+	vnode_t *dvp,
+	char *nm,
+	cred_t *cr,
+	caller_context_t *ct,
+	int flags)
+{
+	int	err;
+
+	/*
+	 * If this file system doesn't support case-insensitive access
+	 * and said access is requested, fail quickly.
+	 */
+	if (flags & FIGNORECASE &&
+	    (vfs_has_feature(dvp->v_vfsp, VFSFT_CASEINSENSITIVE) == 0 &&
+	    vfs_has_feature(dvp->v_vfsp, VFSFT_NOCASESENSITIVE) == 0))
+		return (EINVAL);
+
+	VOPXID_MAP_CR(dvp, cr);
+
+	err = (*(dvp)->v_op->vop_remove)(dvp, nm, cr, ct, flags);
+	VOPSTATS_UPDATE(dvp, remove);
+	return (err);
+}
+
+int
+fop_link(
+	vnode_t *tdvp,
+	vnode_t *svp,
+	char *tnm,
+	cred_t *cr,
+	caller_context_t *ct,
+	int flags)
+{
+	int	err;
+
+	/*
+	 * If the target file system doesn't support case-insensitive access
+	 * and said access is requested, fail quickly.
+	 */
+	if (flags & FIGNORECASE &&
+	    (vfs_has_feature(tdvp->v_vfsp, VFSFT_CASEINSENSITIVE) == 0 &&
+	    vfs_has_feature(tdvp->v_vfsp, VFSFT_NOCASESENSITIVE) == 0))
+		return (EINVAL);
+
+	VOPXID_MAP_CR(tdvp, cr);
+
+	err = (*(tdvp)->v_op->vop_link)(tdvp, svp, tnm, cr, ct, flags);
+	VOPSTATS_UPDATE(tdvp, link);
+	return (err);
+}
+
+int
+fop_rename(
+	vnode_t *sdvp,
+	char *snm,
+	vnode_t *tdvp,
+	char *tnm,
+	cred_t *cr,
+	caller_context_t *ct,
+	int flags)
+{
+	int	err;
+
+	/*
+	 * If the file system involved does not support
+	 * case-insensitive access and said access is requested, fail
+	 * quickly.
+	 */
+	if (flags & FIGNORECASE &&
+	    ((vfs_has_feature(sdvp->v_vfsp, VFSFT_CASEINSENSITIVE) == 0 &&
+	    vfs_has_feature(sdvp->v_vfsp, VFSFT_NOCASESENSITIVE) == 0)))
+		return (EINVAL);
+
+	VOPXID_MAP_CR(tdvp, cr);
+
+	err = (*(sdvp)->v_op->vop_rename)(sdvp, snm, tdvp, tnm, cr, ct, flags);
+	VOPSTATS_UPDATE(sdvp, rename);
+	return (err);
+}
+
+int
+fop_mkdir(
+	vnode_t *dvp,
+	char *dirname,
+	vattr_t *vap,
+	vnode_t **vpp,
+	cred_t *cr,
+	caller_context_t *ct,
+	int flags,
+	vsecattr_t *vsecp)	/* ACL to set during create */
+{
+	int ret;
+
+	if (vsecp != NULL &&
+	    vfs_has_feature(dvp->v_vfsp, VFSFT_ACLONCREATE) == 0) {
+		return (EINVAL);
+	}
+	/*
+	 * If this file system doesn't support case-insensitive access
+	 * and said access is requested, fail quickly.
+	 */
+	if (flags & FIGNORECASE &&
+	    (vfs_has_feature(dvp->v_vfsp, VFSFT_CASEINSENSITIVE) == 0 &&
+	    vfs_has_feature(dvp->v_vfsp, VFSFT_NOCASESENSITIVE) == 0))
+		return (EINVAL);
+
+	VOPXID_MAP_CR(dvp, cr);
+
+	ret = (*(dvp)->v_op->vop_mkdir)
+	    (dvp, dirname, vap, vpp, cr, ct, flags, vsecp);
+	if (ret == 0 && *vpp) {
+		VOPSTATS_UPDATE(*vpp, mkdir);
+		if ((*vpp)->v_path == NULL) {
+			vn_setpath(rootdir, dvp, *vpp, dirname,
+			    strlen(dirname));
+		}
+	}
+
+	return (ret);
+}
+
+int
+fop_rmdir(
+	vnode_t *dvp,
+	char *nm,
+	vnode_t *cdir,
+	cred_t *cr,
+	caller_context_t *ct,
+	int flags)
+{
+	int	err;
+
+	/*
+	 * If this file system doesn't support case-insensitive access
+	 * and said access is requested, fail quickly.
+	 */
+	if (flags & FIGNORECASE &&
+	    (vfs_has_feature(dvp->v_vfsp, VFSFT_CASEINSENSITIVE) == 0 &&
+	    vfs_has_feature(dvp->v_vfsp, VFSFT_NOCASESENSITIVE) == 0))
+		return (EINVAL);
+
+	VOPXID_MAP_CR(dvp, cr);
+
+	err = (*(dvp)->v_op->vop_rmdir)(dvp, nm, cdir, cr, ct, flags);
+	VOPSTATS_UPDATE(dvp, rmdir);
+	return (err);
+}
+
+int
+fop_readdir(
+	vnode_t *vp,
+	uio_t *uiop,
+	cred_t *cr,
+	int *eofp,
+	caller_context_t *ct,
+	int flags)
+{
+	int	err;
+	ssize_t	resid_start = uiop->uio_resid;
+
+	/*
+	 * If this file system doesn't support retrieving directory
+	 * entry flags and said access is requested, fail quickly.
+	 */
+	if (flags & V_RDDIR_ENTFLAGS &&
+	    vfs_has_feature(vp->v_vfsp, VFSFT_DIRENTFLAGS) == 0)
+		return (EINVAL);
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_readdir)(vp, uiop, cr, eofp, ct, flags);
+	VOPSTATS_UPDATE_IO(vp, readdir,
+	    readdir_bytes, (resid_start - uiop->uio_resid));
+	return (err);
+}
+
+int
+fop_symlink(
+	vnode_t *dvp,
+	char *linkname,
+	vattr_t *vap,
+	char *target,
+	cred_t *cr,
+	caller_context_t *ct,
+	int flags)
+{
+	int	err;
+	xvattr_t xvattr;
+
+	/*
+	 * If this file system doesn't support case-insensitive access
+	 * and said access is requested, fail quickly.
+	 */
+	if (flags & FIGNORECASE &&
+	    (vfs_has_feature(dvp->v_vfsp, VFSFT_CASEINSENSITIVE) == 0 &&
+	    vfs_has_feature(dvp->v_vfsp, VFSFT_NOCASESENSITIVE) == 0))
+		return (EINVAL);
+
+	VOPXID_MAP_CR(dvp, cr);
+
+	/* check for reparse point */
+	if ((vfs_has_feature(dvp->v_vfsp, VFSFT_REPARSE)) &&
+	    (strncmp(target, FS_REPARSE_TAG_STR,
+	    strlen(FS_REPARSE_TAG_STR)) == 0)) {
+		if (!fs_reparse_mark(target, vap, &xvattr))
+			vap = (vattr_t *)&xvattr;
+	}
+
+	err = (*(dvp)->v_op->vop_symlink)
+	    (dvp, linkname, vap, target, cr, ct, flags);
+	VOPSTATS_UPDATE(dvp, symlink);
+	return (err);
+}
+
+int
+fop_readlink(
+	vnode_t *vp,
+	uio_t *uiop,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_readlink)(vp, uiop, cr, ct);
+	VOPSTATS_UPDATE(vp, readlink);
+	return (err);
+}
+
+int
+fop_fsync(
+	vnode_t *vp,
+	int syncflag,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_fsync)(vp, syncflag, cr, ct);
+	VOPSTATS_UPDATE(vp, fsync);
+	return (err);
+}
+
+void
+fop_inactive(
+	vnode_t *vp,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	/* Need to update stats before vop call since we may lose the vnode */
+	VOPSTATS_UPDATE(vp, inactive);
+
+	VOPXID_MAP_CR(vp, cr);
+
+	(*(vp)->v_op->vop_inactive)(vp, cr, ct);
+}
+
+int
+fop_fid(
+	vnode_t *vp,
+	fid_t *fidp,
+	caller_context_t *ct)
+{
+	int	err;
+
+	err = (*(vp)->v_op->vop_fid)(vp, fidp, ct);
+	VOPSTATS_UPDATE(vp, fid);
+	return (err);
+}
+
+int
+fop_rwlock(
+	vnode_t *vp,
+	int write_lock,
+	caller_context_t *ct)
+{
+	int	ret;
+
+	ret = ((*(vp)->v_op->vop_rwlock)(vp, write_lock, ct));
+	VOPSTATS_UPDATE(vp, rwlock);
+	return (ret);
+}
+
+void
+fop_rwunlock(
+	vnode_t *vp,
+	int write_lock,
+	caller_context_t *ct)
+{
+	(*(vp)->v_op->vop_rwunlock)(vp, write_lock, ct);
+	VOPSTATS_UPDATE(vp, rwunlock);
+}
+
+int
+fop_seek(
+	vnode_t *vp,
+	offset_t ooff,
+	offset_t *noffp,
+	caller_context_t *ct)
+{
+	int	err;
+
+	err = (*(vp)->v_op->vop_seek)(vp, ooff, noffp, ct);
+	VOPSTATS_UPDATE(vp, seek);
+	return (err);
+}
+
+int
+fop_cmp(
+	vnode_t *vp1,
+	vnode_t *vp2,
+	caller_context_t *ct)
+{
+	int	err;
+
+	err = (*(vp1)->v_op->vop_cmp)(vp1, vp2, ct);
+	VOPSTATS_UPDATE(vp1, cmp);
+	return (err);
+}
+
+int
+fop_frlock(
+	vnode_t *vp,
+	int cmd,
+	flock64_t *bfp,
+	int flag,
+	offset_t offset,
+	struct flk_callback *flk_cbp,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_frlock)
+	    (vp, cmd, bfp, flag, offset, flk_cbp, cr, ct);
+	VOPSTATS_UPDATE(vp, frlock);
+	return (err);
+}
+
+int
+fop_space(
+	vnode_t *vp,
+	int cmd,
+	flock64_t *bfp,
+	int flag,
+	offset_t offset,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_space)(vp, cmd, bfp, flag, offset, cr, ct);
+	VOPSTATS_UPDATE(vp, space);
+	return (err);
+}
+
+int
+fop_realvp(
+	vnode_t *vp,
+	vnode_t **vpp,
+	caller_context_t *ct)
+{
+	int	err;
+
+	err = (*(vp)->v_op->vop_realvp)(vp, vpp, ct);
+	VOPSTATS_UPDATE(vp, realvp);
+	return (err);
+}
+
+int
+fop_getpage(
+	vnode_t *vp,
+	offset_t off,
+	size_t len,
+	uint_t *protp,
+	page_t **plarr,
+	size_t plsz,
+	struct seg *seg,
+	caddr_t addr,
+	enum seg_rw rw,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_getpage)
+	    (vp, off, len, protp, plarr, plsz, seg, addr, rw, cr, ct);
+	VOPSTATS_UPDATE(vp, getpage);
+	return (err);
+}
+
+int
+fop_putpage(
+	vnode_t *vp,
+	offset_t off,
+	size_t len,
+	int flags,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_putpage)(vp, off, len, flags, cr, ct);
+	VOPSTATS_UPDATE(vp, putpage);
+	return (err);
+}
+
+int
+fop_map(
+	vnode_t *vp,
+	offset_t off,
+	struct as *as,
+	caddr_t *addrp,
+	size_t len,
+	uchar_t prot,
+	uchar_t maxprot,
+	uint_t flags,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_map)
+	    (vp, off, as, addrp, len, prot, maxprot, flags, cr, ct);
+	VOPSTATS_UPDATE(vp, map);
+	return (err);
+}
+
+int
+fop_addmap(
+	vnode_t *vp,
+	offset_t off,
+	struct as *as,
+	caddr_t addr,
+	size_t len,
+	uchar_t prot,
+	uchar_t maxprot,
+	uint_t flags,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int error;
+	u_longlong_t delta;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	error = (*(vp)->v_op->vop_addmap)
+	    (vp, off, as, addr, len, prot, maxprot, flags, cr, ct);
+
+	if ((!error) && (vp->v_type == VREG)) {
+		delta = (u_longlong_t)btopr(len);
+		/*
+		 * If file is declared MAP_PRIVATE, it can't be written back
+		 * even if open for write. Handle as read.
+		 */
+		if (flags & MAP_PRIVATE) {
+			atomic_add_64((uint64_t *)(&(vp->v_mmap_read)),
+			    (int64_t)delta);
+		} else {
+			/*
+			 * atomic_add_64 forces the fetch of a 64 bit value to
+			 * be atomic on 32 bit machines
+			 */
+			if (maxprot & PROT_WRITE)
+				atomic_add_64((uint64_t *)(&(vp->v_mmap_write)),
+				    (int64_t)delta);
+			if (maxprot & PROT_READ)
+				atomic_add_64((uint64_t *)(&(vp->v_mmap_read)),
+				    (int64_t)delta);
+			if (maxprot & PROT_EXEC)
+				atomic_add_64((uint64_t *)(&(vp->v_mmap_read)),
+				    (int64_t)delta);
+		}
+	}
+	VOPSTATS_UPDATE(vp, addmap);
+	return (error);
+}
+
+int
+fop_delmap(
+	vnode_t *vp,
+	offset_t off,
+	struct as *as,
+	caddr_t addr,
+	size_t len,
+	uint_t prot,
+	uint_t maxprot,
+	uint_t flags,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int error;
+	u_longlong_t delta;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	error = (*(vp)->v_op->vop_delmap)
+	    (vp, off, as, addr, len, prot, maxprot, flags, cr, ct);
+
+	/*
+	 * NFS calls into delmap twice, the first time
+	 * it simply establishes a callback mechanism and returns EAGAIN
+	 * while the real work is being done upon the second invocation.
+	 * We have to detect this here and only decrement the counts upon
+	 * the second delmap request.
+	 */
+	if ((error != EAGAIN) && (vp->v_type == VREG)) {
+
+		delta = (u_longlong_t)btopr(len);
+
+		if (flags & MAP_PRIVATE) {
+			atomic_add_64((uint64_t *)(&(vp->v_mmap_read)),
+			    (int64_t)(-delta));
+		} else {
+			/*
+			 * atomic_add_64 forces the fetch of a 64 bit value
+			 * to be atomic on 32 bit machines
+			 */
+			if (maxprot & PROT_WRITE)
+				atomic_add_64((uint64_t *)(&(vp->v_mmap_write)),
+				    (int64_t)(-delta));
+			if (maxprot & PROT_READ)
+				atomic_add_64((uint64_t *)(&(vp->v_mmap_read)),
+				    (int64_t)(-delta));
+			if (maxprot & PROT_EXEC)
+				atomic_add_64((uint64_t *)(&(vp->v_mmap_read)),
+				    (int64_t)(-delta));
+		}
+	}
+	VOPSTATS_UPDATE(vp, delmap);
+	return (error);
+}
+
+
+int
+fop_poll(
+	vnode_t *vp,
+	short events,
+	int anyyet,
+	short *reventsp,
+	struct pollhead **phpp,
+	caller_context_t *ct)
+{
+	int	err;
+
+	err = (*(vp)->v_op->vop_poll)(vp, events, anyyet, reventsp, phpp, ct);
+	VOPSTATS_UPDATE(vp, poll);
+	return (err);
+}
+
+int
+fop_dump(
+	vnode_t *vp,
+	caddr_t addr,
+	offset_t lbdn,
+	offset_t dblks,
+	caller_context_t *ct)
+{
+	int	err;
+
+	/* ensure lbdn and dblks can be passed safely to bdev_dump */
+	if ((lbdn != (daddr_t)lbdn) || (dblks != (int)dblks))
+		return (EIO);
+
+	err = (*(vp)->v_op->vop_dump)(vp, addr, lbdn, dblks, ct);
+	VOPSTATS_UPDATE(vp, dump);
+	return (err);
+}
+
+int
+fop_pathconf(
+	vnode_t *vp,
+	int cmd,
+	ulong_t *valp,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_pathconf)(vp, cmd, valp, cr, ct);
+	VOPSTATS_UPDATE(vp, pathconf);
+	return (err);
+}
+
+int
+fop_pageio(
+	vnode_t *vp,
+	struct page *pp,
+	u_offset_t io_off,
+	size_t io_len,
+	int flags,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_pageio)(vp, pp, io_off, io_len, flags, cr, ct);
+	VOPSTATS_UPDATE(vp, pageio);
+	return (err);
+}
+
+int
+fop_dumpctl(
+	vnode_t *vp,
+	int action,
+	offset_t *blkp,
+	caller_context_t *ct)
+{
+	int	err;
+	err = (*(vp)->v_op->vop_dumpctl)(vp, action, blkp, ct);
+	VOPSTATS_UPDATE(vp, dumpctl);
+	return (err);
+}
+
+void
+fop_dispose(
+	vnode_t *vp,
+	page_t *pp,
+	int flag,
+	int dn,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	/* Must do stats first since it's possible to lose the vnode */
+	VOPSTATS_UPDATE(vp, dispose);
+
+	VOPXID_MAP_CR(vp, cr);
+
+	(*(vp)->v_op->vop_dispose)(vp, pp, flag, dn, cr, ct);
+}
+
+int
+fop_setsecattr(
+	vnode_t *vp,
+	vsecattr_t *vsap,
+	int flag,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	/*
+	 * We're only allowed to skip the ACL check iff we used a 32 bit
+	 * ACE mask with VOP_ACCESS() to determine permissions.
+	 */
+	if ((flag & ATTR_NOACLCHECK) &&
+	    vfs_has_feature(vp->v_vfsp, VFSFT_ACEMASKONACCESS) == 0) {
+		return (EINVAL);
+	}
+	err = (*(vp)->v_op->vop_setsecattr) (vp, vsap, flag, cr, ct);
+	VOPSTATS_UPDATE(vp, setsecattr);
+	return (err);
+}
+
+int
+fop_getsecattr(
+	vnode_t *vp,
+	vsecattr_t *vsap,
+	int flag,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	/*
+	 * We're only allowed to skip the ACL check iff we used a 32 bit
+	 * ACE mask with VOP_ACCESS() to determine permissions.
+	 */
+	if ((flag & ATTR_NOACLCHECK) &&
+	    vfs_has_feature(vp->v_vfsp, VFSFT_ACEMASKONACCESS) == 0) {
+		return (EINVAL);
+	}
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_getsecattr) (vp, vsap, flag, cr, ct);
+	VOPSTATS_UPDATE(vp, getsecattr);
+	return (err);
+}
+
+int
+fop_shrlock(
+	vnode_t *vp,
+	int cmd,
+	struct shrlock *shr,
+	int flag,
+	cred_t *cr,
+	caller_context_t *ct)
+{
+	int	err;
+
+	VOPXID_MAP_CR(vp, cr);
+
+	err = (*(vp)->v_op->vop_shrlock)(vp, cmd, shr, flag, cr, ct);
+	VOPSTATS_UPDATE(vp, shrlock);
+	return (err);
+}
+
+int
+fop_vnevent(vnode_t *vp, vnevent_t vnevent, vnode_t *dvp, char *fnm,
+    caller_context_t *ct)
+{
+	int	err;
+
+	err = (*(vp)->v_op->vop_vnevent)(vp, vnevent, dvp, fnm, ct);
+	VOPSTATS_UPDATE(vp, vnevent);
+	return (err);
+}
+
+int
+fop_reqzcbuf(vnode_t *vp, enum uio_rw ioflag, xuio_t *uiop, cred_t *cr,
+    caller_context_t *ct)
+{
+	int err;
+
+	if (vfs_has_feature(vp->v_vfsp, VFSFT_ZEROCOPY_SUPPORTED) == 0)
+		return (ENOTSUP);
+	err = (*(vp)->v_op->vop_reqzcbuf)(vp, ioflag, uiop, cr, ct);
+	VOPSTATS_UPDATE(vp, reqzcbuf);
+	return (err);
+}
+
+int
+fop_retzcbuf(vnode_t *vp, xuio_t *uiop, cred_t *cr, caller_context_t *ct)
+{
+	int err;
+
+	if (vfs_has_feature(vp->v_vfsp, VFSFT_ZEROCOPY_SUPPORTED) == 0)
+		return (ENOTSUP);
+	err = (*(vp)->v_op->vop_retzcbuf)(vp, uiop, cr, ct);
+	VOPSTATS_UPDATE(vp, retzcbuf);
+	return (err);
+}
+
+/*
+ * Default destructor
+ *	Needed because NULL destructor means that the key is unused
+ */
+/* ARGSUSED */
+void
+vsd_defaultdestructor(void *value)
+{}
+
+/*
+ * Create a key (index into per vnode array)
+ *	Locks out vsd_create, vsd_destroy, and vsd_free
+ *	May allocate memory with lock held
+ */
+void
+vsd_create(uint_t *keyp, void (*destructor)(void *))
+{
+	int	i;
+	uint_t	nkeys;
+
+	/*
+	 * if key is allocated, do nothing
+	 */
+	mutex_enter(&vsd_lock);
+	if (*keyp) {
+		mutex_exit(&vsd_lock);
+		return;
+	}
+	/*
+	 * find an unused key
+	 */
+	if (destructor == NULL)
+		destructor = vsd_defaultdestructor;
+
+	for (i = 0; i < vsd_nkeys; ++i)
+		if (vsd_destructor[i] == NULL)
+			break;
+
+	/*
+	 * if no unused keys, increase the size of the destructor array
+	 */
+	if (i == vsd_nkeys) {
+		if ((nkeys = (vsd_nkeys << 1)) == 0)
+			nkeys = 1;
+		vsd_destructor =
+		    (void (**)(void *))vsd_realloc((void *)vsd_destructor,
+		    (size_t)(vsd_nkeys * sizeof (void (*)(void *))),
+		    (size_t)(nkeys * sizeof (void (*)(void *))));
+		vsd_nkeys = nkeys;
+	}
+
+	/*
+	 * allocate the next available unused key
+	 */
+	vsd_destructor[i] = destructor;
+	*keyp = i + 1;
+
+	/* create vsd_list, if it doesn't exist */
+	if (vsd_list == NULL) {
+		vsd_list = kmem_alloc(sizeof (list_t), KM_SLEEP);
+		list_create(vsd_list, sizeof (struct vsd_node),
+		    offsetof(struct vsd_node, vs_nodes));
+	}
+
+	mutex_exit(&vsd_lock);
+}
+
+/*
+ * Destroy a key
+ *
+ * Assumes that the caller is preventing vsd_set and vsd_get
+ * Locks out vsd_create, vsd_destroy, and vsd_free
+ * May free memory with lock held
+ */
+void
+vsd_destroy(uint_t *keyp)
+{
+	uint_t key;
+	struct vsd_node *vsd;
+
+	/*
+	 * protect the key namespace and our destructor lists
+	 */
+	mutex_enter(&vsd_lock);
+	key = *keyp;
+	*keyp = 0;
+
+	ASSERT(key <= vsd_nkeys);
+
+	/*
+	 * if the key is valid
+	 */
+	if (key != 0) {
+		uint_t k = key - 1;
+		/*
+		 * for every vnode with VSD, call key's destructor
+		 */
+		for (vsd = list_head(vsd_list); vsd != NULL;
+		    vsd = list_next(vsd_list, vsd)) {
+			/*
+			 * no VSD for key in this vnode
+			 */
+			if (key > vsd->vs_nkeys)
+				continue;
+			/*
+			 * call destructor for key
+			 */
+			if (vsd->vs_value[k] && vsd_destructor[k])
+				(*vsd_destructor[k])(vsd->vs_value[k]);
+			/*
+			 * reset value for key
+			 */
+			vsd->vs_value[k] = NULL;
+		}
+		/*
+		 * actually free the key (NULL destructor == unused)
+		 */
+		vsd_destructor[k] = NULL;
+	}
+
+	mutex_exit(&vsd_lock);
+}
+
+/*
+ * Quickly return the per vnode value that was stored with the specified key
+ * Assumes the caller is protecting key from vsd_create and vsd_destroy
+ * Assumes the caller is holding v_vsd_lock to protect the vsd.
+ */
+void *
+vsd_get(vnode_t *vp, uint_t key)
+{
+	struct vsd_node *vsd;
+
+	ASSERT(vp != NULL);
+	ASSERT(mutex_owned(&vp->v_vsd_lock));
+
+	vsd = vp->v_vsd;
+
+	if (key && vsd != NULL && key <= vsd->vs_nkeys)
+		return (vsd->vs_value[key - 1]);
+	return (NULL);
+}
+
+/*
+ * Set a per vnode value indexed with the specified key
+ * Assumes the caller is holding v_vsd_lock to protect the vsd.
+ */
+int
+vsd_set(vnode_t *vp, uint_t key, void *value)
+{
+	struct vsd_node *vsd;
+
+	ASSERT(vp != NULL);
+	ASSERT(mutex_owned(&vp->v_vsd_lock));
+
+	if (key == 0)
+		return (EINVAL);
+
+	vsd = vp->v_vsd;
+	if (vsd == NULL)
+		vsd = vp->v_vsd = kmem_zalloc(sizeof (*vsd), KM_SLEEP);
+
+	/*
+	 * If the vsd was just allocated, vs_nkeys will be 0, so the following
+	 * code won't happen and we will continue down and allocate space for
+	 * the vs_value array.
+	 * If the caller is replacing one value with another, then it is up
+	 * to the caller to free/rele/destroy the previous value (if needed).
+	 */
+	if (key <= vsd->vs_nkeys) {
+		vsd->vs_value[key - 1] = value;
+		return (0);
+	}
+
+	ASSERT(key <= vsd_nkeys);
+
+	if (vsd->vs_nkeys == 0) {
+		mutex_enter(&vsd_lock);	/* lock out vsd_destroy() */
+		/*
+		 * Link onto list of all VSD nodes.
+		 */
+		list_insert_head(vsd_list, vsd);
+		mutex_exit(&vsd_lock);
+	}
+
+	/*
+	 * Allocate vnode local storage and set the value for key
+	 */
+	vsd->vs_value = vsd_realloc(vsd->vs_value,
+	    vsd->vs_nkeys * sizeof (void *),
+	    key * sizeof (void *));
+	vsd->vs_nkeys = key;
+	vsd->vs_value[key - 1] = value;
+
+	return (0);
+}
+
+/*
+ * Called from vn_free() to run the destructor function for each vsd
+ *	Locks out vsd_create and vsd_destroy
+ *	Assumes that the destructor *DOES NOT* use vsd
+ */
+void
+vsd_free(vnode_t *vp)
+{
+	int i;
+	struct vsd_node *vsd = vp->v_vsd;
+
+	if (vsd == NULL)
+		return;
+
+	if (vsd->vs_nkeys == 0) {
+		kmem_free(vsd, sizeof (*vsd));
+		vp->v_vsd = NULL;
+		return;
+	}
+
+	/*
+	 * lock out vsd_create and vsd_destroy, call
+	 * the destructor, and mark the value as destroyed.
+	 */
+	mutex_enter(&vsd_lock);
+
+	for (i = 0; i < vsd->vs_nkeys; i++) {
+		if (vsd->vs_value[i] && vsd_destructor[i])
+			(*vsd_destructor[i])(vsd->vs_value[i]);
+		vsd->vs_value[i] = NULL;
+	}
+
+	/*
+	 * remove from linked list of VSD nodes
+	 */
+	list_remove(vsd_list, vsd);
+
+	mutex_exit(&vsd_lock);
+
+	/*
+	 * free up the VSD
+	 */
+	kmem_free(vsd->vs_value, vsd->vs_nkeys * sizeof (void *));
+	kmem_free(vsd, sizeof (struct vsd_node));
+	vp->v_vsd = NULL;
+}
+
+/*
+ * realloc
+ */
+static void *
+vsd_realloc(void *old, size_t osize, size_t nsize)
+{
+	void *new;
+
+	new = kmem_zalloc(nsize, KM_SLEEP);
+	if (old) {
+		bcopy(old, new, osize);
+		kmem_free(old, osize);
+	}
+	return (new);
+}
+
+/*
+ * Setup the extensible system attribute for creating a reparse point.
+ * The symlink data 'target' is validated for proper format of a reparse
+ * string and a check also made to make sure the symlink data does not
+ * point to an existing file.
+ *
+ * return 0 if ok else -1.
+ */
+static int
+fs_reparse_mark(char *target, vattr_t *vap, xvattr_t *xvattr)
+{
+	xoptattr_t *xoap;
+
+	if ((!target) || (!vap) || (!xvattr))
+		return (-1);
+
+	/* validate reparse string */
+	if (reparse_validate((const char *)target))
+		return (-1);
+
+	xva_init(xvattr);
+	xvattr->xva_vattr = *vap;
+	xvattr->xva_vattr.va_mask |= AT_XVATTR;
+	xoap = xva_getxoptattr(xvattr);
+	ASSERT(xoap);
+	XVA_SET_REQ(xvattr, XAT_REPARSE);
+	xoap->xoa_reparse = 1;
+
+	return (0);
+}
+
+/*
+ * Function to check whether a symlink is a reparse point.
+ * Return B_TRUE if it is a reparse point, else return B_FALSE
+ */
+boolean_t
+vn_is_reparse(vnode_t *vp, cred_t *cr, caller_context_t *ct)
+{
+	xvattr_t xvattr;
+	xoptattr_t *xoap;
+
+	if ((vp->v_type != VLNK) ||
+	    !(vfs_has_feature(vp->v_vfsp, VFSFT_XVATTR)))
+		return (B_FALSE);
+
+	xva_init(&xvattr);
+	xoap = xva_getxoptattr(&xvattr);
+	ASSERT(xoap);
+	XVA_SET_REQ(&xvattr, XAT_REPARSE);
+
+	if (VOP_GETATTR(vp, &xvattr.xva_vattr, 0, cr, ct))
+		return (B_FALSE);
+
+	if ((!(xvattr.xva_vattr.va_mask & AT_XVATTR)) ||
+	    (!(XVA_ISSET_RTN(&xvattr, XAT_REPARSE))))
+		return (B_FALSE);
+
+	return (xoap->xoa_reparse ? B_TRUE : B_FALSE);
+}
diff --git a/uts/common/fs/zfs/arc.c b/uts/common/fs/zfs/arc.c
new file mode 100644
index 000000000000..a82718e8bc6e
--- /dev/null
+++ b/uts/common/fs/zfs/arc.c
@@ -0,0 +1,4658 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * DVA-based Adjustable Replacement Cache
+ *
+ * While much of the theory of operation used here is
+ * based on the self-tuning, low overhead replacement cache
+ * presented by Megiddo and Modha at FAST 2003, there are some
+ * significant differences:
+ *
+ * 1. The Megiddo and Modha model assumes any page is evictable.
+ * Pages in its cache cannot be "locked" into memory.  This makes
+ * the eviction algorithm simple: evict the last page in the list.
+ * This also make the performance characteristics easy to reason
+ * about.  Our cache is not so simple.  At any given moment, some
+ * subset of the blocks in the cache are un-evictable because we
+ * have handed out a reference to them.  Blocks are only evictable
+ * when there are no external references active.  This makes
+ * eviction far more problematic:  we choose to evict the evictable
+ * blocks that are the "lowest" in the list.
+ *
+ * There are times when it is not possible to evict the requested
+ * space.  In these circumstances we are unable to adjust the cache
+ * size.  To prevent the cache growing unbounded at these times we
+ * implement a "cache throttle" that slows the flow of new data
+ * into the cache until we can make space available.
+ *
+ * 2. The Megiddo and Modha model assumes a fixed cache size.
+ * Pages are evicted when the cache is full and there is a cache
+ * miss.  Our model has a variable sized cache.  It grows with
+ * high use, but also tries to react to memory pressure from the
+ * operating system: decreasing its size when system memory is
+ * tight.
+ *
+ * 3. The Megiddo and Modha model assumes a fixed page size. All
+ * elements of the cache are therefor exactly the same size.  So
+ * when adjusting the cache size following a cache miss, its simply
+ * a matter of choosing a single page to evict.  In our model, we
+ * have variable sized cache blocks (rangeing from 512 bytes to
+ * 128K bytes).  We therefor choose a set of blocks to evict to make
+ * space for a cache miss that approximates as closely as possible
+ * the space used by the new block.
+ *
+ * See also:  "ARC: A Self-Tuning, Low Overhead Replacement Cache"
+ * by N. Megiddo & D. Modha, FAST 2003
+ */
+
+/*
+ * The locking model:
+ *
+ * A new reference to a cache buffer can be obtained in two
+ * ways: 1) via a hash table lookup using the DVA as a key,
+ * or 2) via one of the ARC lists.  The arc_read() interface
+ * uses method 1, while the internal arc algorithms for
+ * adjusting the cache use method 2.  We therefor provide two
+ * types of locks: 1) the hash table lock array, and 2) the
+ * arc list locks.
+ *
+ * Buffers do not have their own mutexs, rather they rely on the
+ * hash table mutexs for the bulk of their protection (i.e. most
+ * fields in the arc_buf_hdr_t are protected by these mutexs).
+ *
+ * buf_hash_find() returns the appropriate mutex (held) when it
+ * locates the requested buffer in the hash table.  It returns
+ * NULL for the mutex if the buffer was not in the table.
+ *
+ * buf_hash_remove() expects the appropriate hash mutex to be
+ * already held before it is invoked.
+ *
+ * Each arc state also has a mutex which is used to protect the
+ * buffer list associated with the state.  When attempting to
+ * obtain a hash table lock while holding an arc list lock you
+ * must use: mutex_tryenter() to avoid deadlock.  Also note that
+ * the active state mutex must be held before the ghost state mutex.
+ *
+ * Arc buffers may have an associated eviction callback function.
+ * This function will be invoked prior to removing the buffer (e.g.
+ * in arc_do_user_evicts()).  Note however that the data associated
+ * with the buffer may be evicted prior to the callback.  The callback
+ * must be made with *no locks held* (to prevent deadlock).  Additionally,
+ * the users of callbacks must ensure that their private data is
+ * protected from simultaneous callbacks from arc_buf_evict()
+ * and arc_do_user_evicts().
+ *
+ * Note that the majority of the performance stats are manipulated
+ * with atomic operations.
+ *
+ * The L2ARC uses the l2arc_buflist_mtx global mutex for the following:
+ *
+ *	- L2ARC buflist creation
+ *	- L2ARC buflist eviction
+ *	- L2ARC write completion, which walks L2ARC buflists
+ *	- ARC header destruction, as it removes from L2ARC buflists
+ *	- ARC header release, as it removes from L2ARC buflists
+ */
+
+#include <sys/spa.h>
+#include <sys/zio.h>
+#include <sys/zfs_context.h>
+#include <sys/arc.h>
+#include <sys/refcount.h>
+#include <sys/vdev.h>
+#include <sys/vdev_impl.h>
+#ifdef _KERNEL
+#include <sys/vmsystm.h>
+#include <vm/anon.h>
+#include <sys/fs/swapnode.h>
+#include <sys/dnlc.h>
+#endif
+#include <sys/callb.h>
+#include <sys/kstat.h>
+#include <zfs_fletcher.h>
+
+static kmutex_t		arc_reclaim_thr_lock;
+static kcondvar_t	arc_reclaim_thr_cv;	/* used to signal reclaim thr */
+static uint8_t		arc_thread_exit;
+
+extern int zfs_write_limit_shift;
+extern uint64_t zfs_write_limit_max;
+extern kmutex_t zfs_write_limit_lock;
+
+#define	ARC_REDUCE_DNLC_PERCENT	3
+uint_t arc_reduce_dnlc_percent = ARC_REDUCE_DNLC_PERCENT;
+
+typedef enum arc_reclaim_strategy {
+	ARC_RECLAIM_AGGR,		/* Aggressive reclaim strategy */
+	ARC_RECLAIM_CONS		/* Conservative reclaim strategy */
+} arc_reclaim_strategy_t;
+
+/* number of seconds before growing cache again */
+static int		arc_grow_retry = 60;
+
+/* shift of arc_c for calculating both min and max arc_p */
+static int		arc_p_min_shift = 4;
+
+/* log2(fraction of arc to reclaim) */
+static int		arc_shrink_shift = 5;
+
+/*
+ * minimum lifespan of a prefetch block in clock ticks
+ * (initialized in arc_init())
+ */
+static int		arc_min_prefetch_lifespan;
+
+static int arc_dead;
+
+/*
+ * The arc has filled available memory and has now warmed up.
+ */
+static boolean_t arc_warm;
+
+/*
+ * These tunables are for performance analysis.
+ */
+uint64_t zfs_arc_max;
+uint64_t zfs_arc_min;
+uint64_t zfs_arc_meta_limit = 0;
+int zfs_arc_grow_retry = 0;
+int zfs_arc_shrink_shift = 0;
+int zfs_arc_p_min_shift = 0;
+
+/*
+ * Note that buffers can be in one of 6 states:
+ *	ARC_anon	- anonymous (discussed below)
+ *	ARC_mru		- recently used, currently cached
+ *	ARC_mru_ghost	- recentely used, no longer in cache
+ *	ARC_mfu		- frequently used, currently cached
+ *	ARC_mfu_ghost	- frequently used, no longer in cache
+ *	ARC_l2c_only	- exists in L2ARC but not other states
+ * When there are no active references to the buffer, they are
+ * are linked onto a list in one of these arc states.  These are
+ * the only buffers that can be evicted or deleted.  Within each
+ * state there are multiple lists, one for meta-data and one for
+ * non-meta-data.  Meta-data (indirect blocks, blocks of dnodes,
+ * etc.) is tracked separately so that it can be managed more
+ * explicitly: favored over data, limited explicitly.
+ *
+ * Anonymous buffers are buffers that are not associated with
+ * a DVA.  These are buffers that hold dirty block copies
+ * before they are written to stable storage.  By definition,
+ * they are "ref'd" and are considered part of arc_mru
+ * that cannot be freed.  Generally, they will aquire a DVA
+ * as they are written and migrate onto the arc_mru list.
+ *
+ * The ARC_l2c_only state is for buffers that are in the second
+ * level ARC but no longer in any of the ARC_m* lists.  The second
+ * level ARC itself may also contain buffers that are in any of
+ * the ARC_m* states - meaning that a buffer can exist in two
+ * places.  The reason for the ARC_l2c_only state is to keep the
+ * buffer header in the hash table, so that reads that hit the
+ * second level ARC benefit from these fast lookups.
+ */
+
+typedef struct arc_state {
+	list_t	arcs_list[ARC_BUFC_NUMTYPES];	/* list of evictable buffers */
+	uint64_t arcs_lsize[ARC_BUFC_NUMTYPES];	/* amount of evictable data */
+	uint64_t arcs_size;	/* total amount of data in this state */
+	kmutex_t arcs_mtx;
+} arc_state_t;
+
+/* The 6 states: */
+static arc_state_t ARC_anon;
+static arc_state_t ARC_mru;
+static arc_state_t ARC_mru_ghost;
+static arc_state_t ARC_mfu;
+static arc_state_t ARC_mfu_ghost;
+static arc_state_t ARC_l2c_only;
+
+typedef struct arc_stats {
+	kstat_named_t arcstat_hits;
+	kstat_named_t arcstat_misses;
+	kstat_named_t arcstat_demand_data_hits;
+	kstat_named_t arcstat_demand_data_misses;
+	kstat_named_t arcstat_demand_metadata_hits;
+	kstat_named_t arcstat_demand_metadata_misses;
+	kstat_named_t arcstat_prefetch_data_hits;
+	kstat_named_t arcstat_prefetch_data_misses;
+	kstat_named_t arcstat_prefetch_metadata_hits;
+	kstat_named_t arcstat_prefetch_metadata_misses;
+	kstat_named_t arcstat_mru_hits;
+	kstat_named_t arcstat_mru_ghost_hits;
+	kstat_named_t arcstat_mfu_hits;
+	kstat_named_t arcstat_mfu_ghost_hits;
+	kstat_named_t arcstat_deleted;
+	kstat_named_t arcstat_recycle_miss;
+	kstat_named_t arcstat_mutex_miss;
+	kstat_named_t arcstat_evict_skip;
+	kstat_named_t arcstat_evict_l2_cached;
+	kstat_named_t arcstat_evict_l2_eligible;
+	kstat_named_t arcstat_evict_l2_ineligible;
+	kstat_named_t arcstat_hash_elements;
+	kstat_named_t arcstat_hash_elements_max;
+	kstat_named_t arcstat_hash_collisions;
+	kstat_named_t arcstat_hash_chains;
+	kstat_named_t arcstat_hash_chain_max;
+	kstat_named_t arcstat_p;
+	kstat_named_t arcstat_c;
+	kstat_named_t arcstat_c_min;
+	kstat_named_t arcstat_c_max;
+	kstat_named_t arcstat_size;
+	kstat_named_t arcstat_hdr_size;
+	kstat_named_t arcstat_data_size;
+	kstat_named_t arcstat_other_size;
+	kstat_named_t arcstat_l2_hits;
+	kstat_named_t arcstat_l2_misses;
+	kstat_named_t arcstat_l2_feeds;
+	kstat_named_t arcstat_l2_rw_clash;
+	kstat_named_t arcstat_l2_read_bytes;
+	kstat_named_t arcstat_l2_write_bytes;
+	kstat_named_t arcstat_l2_writes_sent;
+	kstat_named_t arcstat_l2_writes_done;
+	kstat_named_t arcstat_l2_writes_error;
+	kstat_named_t arcstat_l2_writes_hdr_miss;
+	kstat_named_t arcstat_l2_evict_lock_retry;
+	kstat_named_t arcstat_l2_evict_reading;
+	kstat_named_t arcstat_l2_free_on_write;
+	kstat_named_t arcstat_l2_abort_lowmem;
+	kstat_named_t arcstat_l2_cksum_bad;
+	kstat_named_t arcstat_l2_io_error;
+	kstat_named_t arcstat_l2_size;
+	kstat_named_t arcstat_l2_hdr_size;
+	kstat_named_t arcstat_memory_throttle_count;
+} arc_stats_t;
+
+static arc_stats_t arc_stats = {
+	{ "hits",			KSTAT_DATA_UINT64 },
+	{ "misses",			KSTAT_DATA_UINT64 },
+	{ "demand_data_hits",		KSTAT_DATA_UINT64 },
+	{ "demand_data_misses",		KSTAT_DATA_UINT64 },
+	{ "demand_metadata_hits",	KSTAT_DATA_UINT64 },
+	{ "demand_metadata_misses",	KSTAT_DATA_UINT64 },
+	{ "prefetch_data_hits",		KSTAT_DATA_UINT64 },
+	{ "prefetch_data_misses",	KSTAT_DATA_UINT64 },
+	{ "prefetch_metadata_hits",	KSTAT_DATA_UINT64 },
+	{ "prefetch_metadata_misses",	KSTAT_DATA_UINT64 },
+	{ "mru_hits",			KSTAT_DATA_UINT64 },
+	{ "mru_ghost_hits",		KSTAT_DATA_UINT64 },
+	{ "mfu_hits",			KSTAT_DATA_UINT64 },
+	{ "mfu_ghost_hits",		KSTAT_DATA_UINT64 },
+	{ "deleted",			KSTAT_DATA_UINT64 },
+	{ "recycle_miss",		KSTAT_DATA_UINT64 },
+	{ "mutex_miss",			KSTAT_DATA_UINT64 },
+	{ "evict_skip",			KSTAT_DATA_UINT64 },
+	{ "evict_l2_cached",		KSTAT_DATA_UINT64 },
+	{ "evict_l2_eligible",		KSTAT_DATA_UINT64 },
+	{ "evict_l2_ineligible",	KSTAT_DATA_UINT64 },
+	{ "hash_elements",		KSTAT_DATA_UINT64 },
+	{ "hash_elements_max",		KSTAT_DATA_UINT64 },
+	{ "hash_collisions",		KSTAT_DATA_UINT64 },
+	{ "hash_chains",		KSTAT_DATA_UINT64 },
+	{ "hash_chain_max",		KSTAT_DATA_UINT64 },
+	{ "p",				KSTAT_DATA_UINT64 },
+	{ "c",				KSTAT_DATA_UINT64 },
+	{ "c_min",			KSTAT_DATA_UINT64 },
+	{ "c_max",			KSTAT_DATA_UINT64 },
+	{ "size",			KSTAT_DATA_UINT64 },
+	{ "hdr_size",			KSTAT_DATA_UINT64 },
+	{ "data_size",			KSTAT_DATA_UINT64 },
+	{ "other_size",			KSTAT_DATA_UINT64 },
+	{ "l2_hits",			KSTAT_DATA_UINT64 },
+	{ "l2_misses",			KSTAT_DATA_UINT64 },
+	{ "l2_feeds",			KSTAT_DATA_UINT64 },
+	{ "l2_rw_clash",		KSTAT_DATA_UINT64 },
+	{ "l2_read_bytes",		KSTAT_DATA_UINT64 },
+	{ "l2_write_bytes",		KSTAT_DATA_UINT64 },
+	{ "l2_writes_sent",		KSTAT_DATA_UINT64 },
+	{ "l2_writes_done",		KSTAT_DATA_UINT64 },
+	{ "l2_writes_error",		KSTAT_DATA_UINT64 },
+	{ "l2_writes_hdr_miss",		KSTAT_DATA_UINT64 },
+	{ "l2_evict_lock_retry",	KSTAT_DATA_UINT64 },
+	{ "l2_evict_reading",		KSTAT_DATA_UINT64 },
+	{ "l2_free_on_write",		KSTAT_DATA_UINT64 },
+	{ "l2_abort_lowmem",		KSTAT_DATA_UINT64 },
+	{ "l2_cksum_bad",		KSTAT_DATA_UINT64 },
+	{ "l2_io_error",		KSTAT_DATA_UINT64 },
+	{ "l2_size",			KSTAT_DATA_UINT64 },
+	{ "l2_hdr_size",		KSTAT_DATA_UINT64 },
+	{ "memory_throttle_count",	KSTAT_DATA_UINT64 }
+};
+
+#define	ARCSTAT(stat)	(arc_stats.stat.value.ui64)
+
+#define	ARCSTAT_INCR(stat, val) \
+	atomic_add_64(&arc_stats.stat.value.ui64, (val));
+
+#define	ARCSTAT_BUMP(stat)	ARCSTAT_INCR(stat, 1)
+#define	ARCSTAT_BUMPDOWN(stat)	ARCSTAT_INCR(stat, -1)
+
+#define	ARCSTAT_MAX(stat, val) {					\
+	uint64_t m;							\
+	while ((val) > (m = arc_stats.stat.value.ui64) &&		\
+	    (m != atomic_cas_64(&arc_stats.stat.value.ui64, m, (val))))	\
+		continue;						\
+}
+
+#define	ARCSTAT_MAXSTAT(stat) \
+	ARCSTAT_MAX(stat##_max, arc_stats.stat.value.ui64)
+
+/*
+ * We define a macro to allow ARC hits/misses to be easily broken down by
+ * two separate conditions, giving a total of four different subtypes for
+ * each of hits and misses (so eight statistics total).
+ */
+#define	ARCSTAT_CONDSTAT(cond1, stat1, notstat1, cond2, stat2, notstat2, stat) \
+	if (cond1) {							\
+		if (cond2) {						\
+			ARCSTAT_BUMP(arcstat_##stat1##_##stat2##_##stat); \
+		} else {						\
+			ARCSTAT_BUMP(arcstat_##stat1##_##notstat2##_##stat); \
+		}							\
+	} else {							\
+		if (cond2) {						\
+			ARCSTAT_BUMP(arcstat_##notstat1##_##stat2##_##stat); \
+		} else {						\
+			ARCSTAT_BUMP(arcstat_##notstat1##_##notstat2##_##stat);\
+		}							\
+	}
+
+kstat_t			*arc_ksp;
+static arc_state_t	*arc_anon;
+static arc_state_t	*arc_mru;
+static arc_state_t	*arc_mru_ghost;
+static arc_state_t	*arc_mfu;
+static arc_state_t	*arc_mfu_ghost;
+static arc_state_t	*arc_l2c_only;
+
+/*
+ * There are several ARC variables that are critical to export as kstats --
+ * but we don't want to have to grovel around in the kstat whenever we wish to
+ * manipulate them.  For these variables, we therefore define them to be in
+ * terms of the statistic variable.  This assures that we are not introducing
+ * the possibility of inconsistency by having shadow copies of the variables,
+ * while still allowing the code to be readable.
+ */
+#define	arc_size	ARCSTAT(arcstat_size)	/* actual total arc size */
+#define	arc_p		ARCSTAT(arcstat_p)	/* target size of MRU */
+#define	arc_c		ARCSTAT(arcstat_c)	/* target size of cache */
+#define	arc_c_min	ARCSTAT(arcstat_c_min)	/* min target cache size */
+#define	arc_c_max	ARCSTAT(arcstat_c_max)	/* max target cache size */
+
+static int		arc_no_grow;	/* Don't try to grow cache size */
+static uint64_t		arc_tempreserve;
+static uint64_t		arc_loaned_bytes;
+static uint64_t		arc_meta_used;
+static uint64_t		arc_meta_limit;
+static uint64_t		arc_meta_max = 0;
+
+typedef struct l2arc_buf_hdr l2arc_buf_hdr_t;
+
+typedef struct arc_callback arc_callback_t;
+
+struct arc_callback {
+	void			*acb_private;
+	arc_done_func_t		*acb_done;
+	arc_buf_t		*acb_buf;
+	zio_t			*acb_zio_dummy;
+	arc_callback_t		*acb_next;
+};
+
+typedef struct arc_write_callback arc_write_callback_t;
+
+struct arc_write_callback {
+	void		*awcb_private;
+	arc_done_func_t	*awcb_ready;
+	arc_done_func_t	*awcb_done;
+	arc_buf_t	*awcb_buf;
+};
+
+struct arc_buf_hdr {
+	/* protected by hash lock */
+	dva_t			b_dva;
+	uint64_t		b_birth;
+	uint64_t		b_cksum0;
+
+	kmutex_t		b_freeze_lock;
+	zio_cksum_t		*b_freeze_cksum;
+	void			*b_thawed;
+
+	arc_buf_hdr_t		*b_hash_next;
+	arc_buf_t		*b_buf;
+	uint32_t		b_flags;
+	uint32_t		b_datacnt;
+
+	arc_callback_t		*b_acb;
+	kcondvar_t		b_cv;
+
+	/* immutable */
+	arc_buf_contents_t	b_type;
+	uint64_t		b_size;
+	uint64_t		b_spa;
+
+	/* protected by arc state mutex */
+	arc_state_t		*b_state;
+	list_node_t		b_arc_node;
+
+	/* updated atomically */
+	clock_t			b_arc_access;
+
+	/* self protecting */
+	refcount_t		b_refcnt;
+
+	l2arc_buf_hdr_t		*b_l2hdr;
+	list_node_t		b_l2node;
+};
+
+static arc_buf_t *arc_eviction_list;
+static kmutex_t arc_eviction_mtx;
+static arc_buf_hdr_t arc_eviction_hdr;
+static void arc_get_data_buf(arc_buf_t *buf);
+static void arc_access(arc_buf_hdr_t *buf, kmutex_t *hash_lock);
+static int arc_evict_needed(arc_buf_contents_t type);
+static void arc_evict_ghost(arc_state_t *state, uint64_t spa, int64_t bytes);
+
+static boolean_t l2arc_write_eligible(uint64_t spa_guid, arc_buf_hdr_t *ab);
+
+#define	GHOST_STATE(state)	\
+	((state) == arc_mru_ghost || (state) == arc_mfu_ghost ||	\
+	(state) == arc_l2c_only)
+
+/*
+ * Private ARC flags.  These flags are private ARC only flags that will show up
+ * in b_flags in the arc_hdr_buf_t.  Some flags are publicly declared, and can
+ * be passed in as arc_flags in things like arc_read.  However, these flags
+ * should never be passed and should only be set by ARC code.  When adding new
+ * public flags, make sure not to smash the private ones.
+ */
+
+#define	ARC_IN_HASH_TABLE	(1 << 9)	/* this buffer is hashed */
+#define	ARC_IO_IN_PROGRESS	(1 << 10)	/* I/O in progress for buf */
+#define	ARC_IO_ERROR		(1 << 11)	/* I/O failed for buf */
+#define	ARC_FREED_IN_READ	(1 << 12)	/* buf freed while in read */
+#define	ARC_BUF_AVAILABLE	(1 << 13)	/* block not in active use */
+#define	ARC_INDIRECT		(1 << 14)	/* this is an indirect block */
+#define	ARC_FREE_IN_PROGRESS	(1 << 15)	/* hdr about to be freed */
+#define	ARC_L2_WRITING		(1 << 16)	/* L2ARC write in progress */
+#define	ARC_L2_EVICTED		(1 << 17)	/* evicted during I/O */
+#define	ARC_L2_WRITE_HEAD	(1 << 18)	/* head of write list */
+
+#define	HDR_IN_HASH_TABLE(hdr)	((hdr)->b_flags & ARC_IN_HASH_TABLE)
+#define	HDR_IO_IN_PROGRESS(hdr)	((hdr)->b_flags & ARC_IO_IN_PROGRESS)
+#define	HDR_IO_ERROR(hdr)	((hdr)->b_flags & ARC_IO_ERROR)
+#define	HDR_PREFETCH(hdr)	((hdr)->b_flags & ARC_PREFETCH)
+#define	HDR_FREED_IN_READ(hdr)	((hdr)->b_flags & ARC_FREED_IN_READ)
+#define	HDR_BUF_AVAILABLE(hdr)	((hdr)->b_flags & ARC_BUF_AVAILABLE)
+#define	HDR_FREE_IN_PROGRESS(hdr)	((hdr)->b_flags & ARC_FREE_IN_PROGRESS)
+#define	HDR_L2CACHE(hdr)	((hdr)->b_flags & ARC_L2CACHE)
+#define	HDR_L2_READING(hdr)	((hdr)->b_flags & ARC_IO_IN_PROGRESS &&	\
+				    (hdr)->b_l2hdr != NULL)
+#define	HDR_L2_WRITING(hdr)	((hdr)->b_flags & ARC_L2_WRITING)
+#define	HDR_L2_EVICTED(hdr)	((hdr)->b_flags & ARC_L2_EVICTED)
+#define	HDR_L2_WRITE_HEAD(hdr)	((hdr)->b_flags & ARC_L2_WRITE_HEAD)
+
+/*
+ * Other sizes
+ */
+
+#define	HDR_SIZE ((int64_t)sizeof (arc_buf_hdr_t))
+#define	L2HDR_SIZE ((int64_t)sizeof (l2arc_buf_hdr_t))
+
+/*
+ * Hash table routines
+ */
+
+#define	HT_LOCK_PAD	64
+
+struct ht_lock {
+	kmutex_t	ht_lock;
+#ifdef _KERNEL
+	unsigned char	pad[(HT_LOCK_PAD - sizeof (kmutex_t))];
+#endif
+};
+
+#define	BUF_LOCKS 256
+typedef struct buf_hash_table {
+	uint64_t ht_mask;
+	arc_buf_hdr_t **ht_table;
+	struct ht_lock ht_locks[BUF_LOCKS];
+} buf_hash_table_t;
+
+static buf_hash_table_t buf_hash_table;
+
+#define	BUF_HASH_INDEX(spa, dva, birth) \
+	(buf_hash(spa, dva, birth) & buf_hash_table.ht_mask)
+#define	BUF_HASH_LOCK_NTRY(idx) (buf_hash_table.ht_locks[idx & (BUF_LOCKS-1)])
+#define	BUF_HASH_LOCK(idx)	(&(BUF_HASH_LOCK_NTRY(idx).ht_lock))
+#define	HDR_LOCK(hdr) \
+	(BUF_HASH_LOCK(BUF_HASH_INDEX(hdr->b_spa, &hdr->b_dva, hdr->b_birth)))
+
+uint64_t zfs_crc64_table[256];
+
+/*
+ * Level 2 ARC
+ */
+
+#define	L2ARC_WRITE_SIZE	(8 * 1024 * 1024)	/* initial write max */
+#define	L2ARC_HEADROOM		2		/* num of writes */
+#define	L2ARC_FEED_SECS		1		/* caching interval secs */
+#define	L2ARC_FEED_MIN_MS	200		/* min caching interval ms */
+
+#define	l2arc_writes_sent	ARCSTAT(arcstat_l2_writes_sent)
+#define	l2arc_writes_done	ARCSTAT(arcstat_l2_writes_done)
+
+/*
+ * L2ARC Performance Tunables
+ */
+uint64_t l2arc_write_max = L2ARC_WRITE_SIZE;	/* default max write size */
+uint64_t l2arc_write_boost = L2ARC_WRITE_SIZE;	/* extra write during warmup */
+uint64_t l2arc_headroom = L2ARC_HEADROOM;	/* number of dev writes */
+uint64_t l2arc_feed_secs = L2ARC_FEED_SECS;	/* interval seconds */
+uint64_t l2arc_feed_min_ms = L2ARC_FEED_MIN_MS;	/* min interval milliseconds */
+boolean_t l2arc_noprefetch = B_TRUE;		/* don't cache prefetch bufs */
+boolean_t l2arc_feed_again = B_TRUE;		/* turbo warmup */
+boolean_t l2arc_norw = B_TRUE;			/* no reads during writes */
+
+/*
+ * L2ARC Internals
+ */
+typedef struct l2arc_dev {
+	vdev_t			*l2ad_vdev;	/* vdev */
+	spa_t			*l2ad_spa;	/* spa */
+	uint64_t		l2ad_hand;	/* next write location */
+	uint64_t		l2ad_write;	/* desired write size, bytes */
+	uint64_t		l2ad_boost;	/* warmup write boost, bytes */
+	uint64_t		l2ad_start;	/* first addr on device */
+	uint64_t		l2ad_end;	/* last addr on device */
+	uint64_t		l2ad_evict;	/* last addr eviction reached */
+	boolean_t		l2ad_first;	/* first sweep through */
+	boolean_t		l2ad_writing;	/* currently writing */
+	list_t			*l2ad_buflist;	/* buffer list */
+	list_node_t		l2ad_node;	/* device list node */
+} l2arc_dev_t;
+
+static list_t L2ARC_dev_list;			/* device list */
+static list_t *l2arc_dev_list;			/* device list pointer */
+static kmutex_t l2arc_dev_mtx;			/* device list mutex */
+static l2arc_dev_t *l2arc_dev_last;		/* last device used */
+static kmutex_t l2arc_buflist_mtx;		/* mutex for all buflists */
+static list_t L2ARC_free_on_write;		/* free after write buf list */
+static list_t *l2arc_free_on_write;		/* free after write list ptr */
+static kmutex_t l2arc_free_on_write_mtx;	/* mutex for list */
+static uint64_t l2arc_ndev;			/* number of devices */
+
+typedef struct l2arc_read_callback {
+	arc_buf_t	*l2rcb_buf;		/* read buffer */
+	spa_t		*l2rcb_spa;		/* spa */
+	blkptr_t	l2rcb_bp;		/* original blkptr */
+	zbookmark_t	l2rcb_zb;		/* original bookmark */
+	int		l2rcb_flags;		/* original flags */
+} l2arc_read_callback_t;
+
+typedef struct l2arc_write_callback {
+	l2arc_dev_t	*l2wcb_dev;		/* device info */
+	arc_buf_hdr_t	*l2wcb_head;		/* head of write buflist */
+} l2arc_write_callback_t;
+
+struct l2arc_buf_hdr {
+	/* protected by arc_buf_hdr  mutex */
+	l2arc_dev_t	*b_dev;			/* L2ARC device */
+	uint64_t	b_daddr;		/* disk address, offset byte */
+};
+
+typedef struct l2arc_data_free {
+	/* protected by l2arc_free_on_write_mtx */
+	void		*l2df_data;
+	size_t		l2df_size;
+	void		(*l2df_func)(void *, size_t);
+	list_node_t	l2df_list_node;
+} l2arc_data_free_t;
+
+static kmutex_t l2arc_feed_thr_lock;
+static kcondvar_t l2arc_feed_thr_cv;
+static uint8_t l2arc_thread_exit;
+
+static void l2arc_read_done(zio_t *zio);
+static void l2arc_hdr_stat_add(void);
+static void l2arc_hdr_stat_remove(void);
+
+static uint64_t
+buf_hash(uint64_t spa, const dva_t *dva, uint64_t birth)
+{
+	uint8_t *vdva = (uint8_t *)dva;
+	uint64_t crc = -1ULL;
+	int i;
+
+	ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY);
+
+	for (i = 0; i < sizeof (dva_t); i++)
+		crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ vdva[i]) & 0xFF];
+
+	crc ^= (spa>>8) ^ birth;
+
+	return (crc);
+}
+
+#define	BUF_EMPTY(buf)						\
+	((buf)->b_dva.dva_word[0] == 0 &&			\
+	(buf)->b_dva.dva_word[1] == 0 &&			\
+	(buf)->b_birth == 0)
+
+#define	BUF_EQUAL(spa, dva, birth, buf)				\
+	((buf)->b_dva.dva_word[0] == (dva)->dva_word[0]) &&	\
+	((buf)->b_dva.dva_word[1] == (dva)->dva_word[1]) &&	\
+	((buf)->b_birth == birth) && ((buf)->b_spa == spa)
+
+static void
+buf_discard_identity(arc_buf_hdr_t *hdr)
+{
+	hdr->b_dva.dva_word[0] = 0;
+	hdr->b_dva.dva_word[1] = 0;
+	hdr->b_birth = 0;
+	hdr->b_cksum0 = 0;
+}
+
+static arc_buf_hdr_t *
+buf_hash_find(uint64_t spa, const dva_t *dva, uint64_t birth, kmutex_t **lockp)
+{
+	uint64_t idx = BUF_HASH_INDEX(spa, dva, birth);
+	kmutex_t *hash_lock = BUF_HASH_LOCK(idx);
+	arc_buf_hdr_t *buf;
+
+	mutex_enter(hash_lock);
+	for (buf = buf_hash_table.ht_table[idx]; buf != NULL;
+	    buf = buf->b_hash_next) {
+		if (BUF_EQUAL(spa, dva, birth, buf)) {
+			*lockp = hash_lock;
+			return (buf);
+		}
+	}
+	mutex_exit(hash_lock);
+	*lockp = NULL;
+	return (NULL);
+}
+
+/*
+ * Insert an entry into the hash table.  If there is already an element
+ * equal to elem in the hash table, then the already existing element
+ * will be returned and the new element will not be inserted.
+ * Otherwise returns NULL.
+ */
+static arc_buf_hdr_t *
+buf_hash_insert(arc_buf_hdr_t *buf, kmutex_t **lockp)
+{
+	uint64_t idx = BUF_HASH_INDEX(buf->b_spa, &buf->b_dva, buf->b_birth);
+	kmutex_t *hash_lock = BUF_HASH_LOCK(idx);
+	arc_buf_hdr_t *fbuf;
+	uint32_t i;
+
+	ASSERT(!HDR_IN_HASH_TABLE(buf));
+	*lockp = hash_lock;
+	mutex_enter(hash_lock);
+	for (fbuf = buf_hash_table.ht_table[idx], i = 0; fbuf != NULL;
+	    fbuf = fbuf->b_hash_next, i++) {
+		if (BUF_EQUAL(buf->b_spa, &buf->b_dva, buf->b_birth, fbuf))
+			return (fbuf);
+	}
+
+	buf->b_hash_next = buf_hash_table.ht_table[idx];
+	buf_hash_table.ht_table[idx] = buf;
+	buf->b_flags |= ARC_IN_HASH_TABLE;
+
+	/* collect some hash table performance data */
+	if (i > 0) {
+		ARCSTAT_BUMP(arcstat_hash_collisions);
+		if (i == 1)
+			ARCSTAT_BUMP(arcstat_hash_chains);
+
+		ARCSTAT_MAX(arcstat_hash_chain_max, i);
+	}
+
+	ARCSTAT_BUMP(arcstat_hash_elements);
+	ARCSTAT_MAXSTAT(arcstat_hash_elements);
+
+	return (NULL);
+}
+
+static void
+buf_hash_remove(arc_buf_hdr_t *buf)
+{
+	arc_buf_hdr_t *fbuf, **bufp;
+	uint64_t idx = BUF_HASH_INDEX(buf->b_spa, &buf->b_dva, buf->b_birth);
+
+	ASSERT(MUTEX_HELD(BUF_HASH_LOCK(idx)));
+	ASSERT(HDR_IN_HASH_TABLE(buf));
+
+	bufp = &buf_hash_table.ht_table[idx];
+	while ((fbuf = *bufp) != buf) {
+		ASSERT(fbuf != NULL);
+		bufp = &fbuf->b_hash_next;
+	}
+	*bufp = buf->b_hash_next;
+	buf->b_hash_next = NULL;
+	buf->b_flags &= ~ARC_IN_HASH_TABLE;
+
+	/* collect some hash table performance data */
+	ARCSTAT_BUMPDOWN(arcstat_hash_elements);
+
+	if (buf_hash_table.ht_table[idx] &&
+	    buf_hash_table.ht_table[idx]->b_hash_next == NULL)
+		ARCSTAT_BUMPDOWN(arcstat_hash_chains);
+}
+
+/*
+ * Global data structures and functions for the buf kmem cache.
+ */
+static kmem_cache_t *hdr_cache;
+static kmem_cache_t *buf_cache;
+
+static void
+buf_fini(void)
+{
+	int i;
+
+	kmem_free(buf_hash_table.ht_table,
+	    (buf_hash_table.ht_mask + 1) * sizeof (void *));
+	for (i = 0; i < BUF_LOCKS; i++)
+		mutex_destroy(&buf_hash_table.ht_locks[i].ht_lock);
+	kmem_cache_destroy(hdr_cache);
+	kmem_cache_destroy(buf_cache);
+}
+
+/*
+ * Constructor callback - called when the cache is empty
+ * and a new buf is requested.
+ */
+/* ARGSUSED */
+static int
+hdr_cons(void *vbuf, void *unused, int kmflag)
+{
+	arc_buf_hdr_t *buf = vbuf;
+
+	bzero(buf, sizeof (arc_buf_hdr_t));
+	refcount_create(&buf->b_refcnt);
+	cv_init(&buf->b_cv, NULL, CV_DEFAULT, NULL);
+	mutex_init(&buf->b_freeze_lock, NULL, MUTEX_DEFAULT, NULL);
+	arc_space_consume(sizeof (arc_buf_hdr_t), ARC_SPACE_HDRS);
+
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+buf_cons(void *vbuf, void *unused, int kmflag)
+{
+	arc_buf_t *buf = vbuf;
+
+	bzero(buf, sizeof (arc_buf_t));
+	mutex_init(&buf->b_evict_lock, NULL, MUTEX_DEFAULT, NULL);
+	rw_init(&buf->b_data_lock, NULL, RW_DEFAULT, NULL);
+	arc_space_consume(sizeof (arc_buf_t), ARC_SPACE_HDRS);
+
+	return (0);
+}
+
+/*
+ * Destructor callback - called when a cached buf is
+ * no longer required.
+ */
+/* ARGSUSED */
+static void
+hdr_dest(void *vbuf, void *unused)
+{
+	arc_buf_hdr_t *buf = vbuf;
+
+	ASSERT(BUF_EMPTY(buf));
+	refcount_destroy(&buf->b_refcnt);
+	cv_destroy(&buf->b_cv);
+	mutex_destroy(&buf->b_freeze_lock);
+	arc_space_return(sizeof (arc_buf_hdr_t), ARC_SPACE_HDRS);
+}
+
+/* ARGSUSED */
+static void
+buf_dest(void *vbuf, void *unused)
+{
+	arc_buf_t *buf = vbuf;
+
+	mutex_destroy(&buf->b_evict_lock);
+	rw_destroy(&buf->b_data_lock);
+	arc_space_return(sizeof (arc_buf_t), ARC_SPACE_HDRS);
+}
+
+/*
+ * Reclaim callback -- invoked when memory is low.
+ */
+/* ARGSUSED */
+static void
+hdr_recl(void *unused)
+{
+	dprintf("hdr_recl called\n");
+	/*
+	 * umem calls the reclaim func when we destroy the buf cache,
+	 * which is after we do arc_fini().
+	 */
+	if (!arc_dead)
+		cv_signal(&arc_reclaim_thr_cv);
+}
+
+static void
+buf_init(void)
+{
+	uint64_t *ct;
+	uint64_t hsize = 1ULL << 12;
+	int i, j;
+
+	/*
+	 * The hash table is big enough to fill all of physical memory
+	 * with an average 64K block size.  The table will take up
+	 * totalmem*sizeof(void*)/64K (eg. 128KB/GB with 8-byte pointers).
+	 */
+	while (hsize * 65536 < physmem * PAGESIZE)
+		hsize <<= 1;
+retry:
+	buf_hash_table.ht_mask = hsize - 1;
+	buf_hash_table.ht_table =
+	    kmem_zalloc(hsize * sizeof (void*), KM_NOSLEEP);
+	if (buf_hash_table.ht_table == NULL) {
+		ASSERT(hsize > (1ULL << 8));
+		hsize >>= 1;
+		goto retry;
+	}
+
+	hdr_cache = kmem_cache_create("arc_buf_hdr_t", sizeof (arc_buf_hdr_t),
+	    0, hdr_cons, hdr_dest, hdr_recl, NULL, NULL, 0);
+	buf_cache = kmem_cache_create("arc_buf_t", sizeof (arc_buf_t),
+	    0, buf_cons, buf_dest, NULL, NULL, NULL, 0);
+
+	for (i = 0; i < 256; i++)
+		for (ct = zfs_crc64_table + i, *ct = i, j = 8; j > 0; j--)
+			*ct = (*ct >> 1) ^ (-(*ct & 1) & ZFS_CRC64_POLY);
+
+	for (i = 0; i < BUF_LOCKS; i++) {
+		mutex_init(&buf_hash_table.ht_locks[i].ht_lock,
+		    NULL, MUTEX_DEFAULT, NULL);
+	}
+}
+
+#define	ARC_MINTIME	(hz>>4) /* 62 ms */
+
+static void
+arc_cksum_verify(arc_buf_t *buf)
+{
+	zio_cksum_t zc;
+
+	if (!(zfs_flags & ZFS_DEBUG_MODIFY))
+		return;
+
+	mutex_enter(&buf->b_hdr->b_freeze_lock);
+	if (buf->b_hdr->b_freeze_cksum == NULL ||
+	    (buf->b_hdr->b_flags & ARC_IO_ERROR)) {
+		mutex_exit(&buf->b_hdr->b_freeze_lock);
+		return;
+	}
+	fletcher_2_native(buf->b_data, buf->b_hdr->b_size, &zc);
+	if (!ZIO_CHECKSUM_EQUAL(*buf->b_hdr->b_freeze_cksum, zc))
+		panic("buffer modified while frozen!");
+	mutex_exit(&buf->b_hdr->b_freeze_lock);
+}
+
+static int
+arc_cksum_equal(arc_buf_t *buf)
+{
+	zio_cksum_t zc;
+	int equal;
+
+	mutex_enter(&buf->b_hdr->b_freeze_lock);
+	fletcher_2_native(buf->b_data, buf->b_hdr->b_size, &zc);
+	equal = ZIO_CHECKSUM_EQUAL(*buf->b_hdr->b_freeze_cksum, zc);
+	mutex_exit(&buf->b_hdr->b_freeze_lock);
+
+	return (equal);
+}
+
+static void
+arc_cksum_compute(arc_buf_t *buf, boolean_t force)
+{
+	if (!force && !(zfs_flags & ZFS_DEBUG_MODIFY))
+		return;
+
+	mutex_enter(&buf->b_hdr->b_freeze_lock);
+	if (buf->b_hdr->b_freeze_cksum != NULL) {
+		mutex_exit(&buf->b_hdr->b_freeze_lock);
+		return;
+	}
+	buf->b_hdr->b_freeze_cksum = kmem_alloc(sizeof (zio_cksum_t), KM_SLEEP);
+	fletcher_2_native(buf->b_data, buf->b_hdr->b_size,
+	    buf->b_hdr->b_freeze_cksum);
+	mutex_exit(&buf->b_hdr->b_freeze_lock);
+}
+
+void
+arc_buf_thaw(arc_buf_t *buf)
+{
+	if (zfs_flags & ZFS_DEBUG_MODIFY) {
+		if (buf->b_hdr->b_state != arc_anon)
+			panic("modifying non-anon buffer!");
+		if (buf->b_hdr->b_flags & ARC_IO_IN_PROGRESS)
+			panic("modifying buffer while i/o in progress!");
+		arc_cksum_verify(buf);
+	}
+
+	mutex_enter(&buf->b_hdr->b_freeze_lock);
+	if (buf->b_hdr->b_freeze_cksum != NULL) {
+		kmem_free(buf->b_hdr->b_freeze_cksum, sizeof (zio_cksum_t));
+		buf->b_hdr->b_freeze_cksum = NULL;
+	}
+
+	if (zfs_flags & ZFS_DEBUG_MODIFY) {
+		if (buf->b_hdr->b_thawed)
+			kmem_free(buf->b_hdr->b_thawed, 1);
+		buf->b_hdr->b_thawed = kmem_alloc(1, KM_SLEEP);
+	}
+
+	mutex_exit(&buf->b_hdr->b_freeze_lock);
+}
+
+void
+arc_buf_freeze(arc_buf_t *buf)
+{
+	kmutex_t *hash_lock;
+
+	if (!(zfs_flags & ZFS_DEBUG_MODIFY))
+		return;
+
+	hash_lock = HDR_LOCK(buf->b_hdr);
+	mutex_enter(hash_lock);
+
+	ASSERT(buf->b_hdr->b_freeze_cksum != NULL ||
+	    buf->b_hdr->b_state == arc_anon);
+	arc_cksum_compute(buf, B_FALSE);
+	mutex_exit(hash_lock);
+}
+
+static void
+add_reference(arc_buf_hdr_t *ab, kmutex_t *hash_lock, void *tag)
+{
+	ASSERT(MUTEX_HELD(hash_lock));
+
+	if ((refcount_add(&ab->b_refcnt, tag) == 1) &&
+	    (ab->b_state != arc_anon)) {
+		uint64_t delta = ab->b_size * ab->b_datacnt;
+		list_t *list = &ab->b_state->arcs_list[ab->b_type];
+		uint64_t *size = &ab->b_state->arcs_lsize[ab->b_type];
+
+		ASSERT(!MUTEX_HELD(&ab->b_state->arcs_mtx));
+		mutex_enter(&ab->b_state->arcs_mtx);
+		ASSERT(list_link_active(&ab->b_arc_node));
+		list_remove(list, ab);
+		if (GHOST_STATE(ab->b_state)) {
+			ASSERT3U(ab->b_datacnt, ==, 0);
+			ASSERT3P(ab->b_buf, ==, NULL);
+			delta = ab->b_size;
+		}
+		ASSERT(delta > 0);
+		ASSERT3U(*size, >=, delta);
+		atomic_add_64(size, -delta);
+		mutex_exit(&ab->b_state->arcs_mtx);
+		/* remove the prefetch flag if we get a reference */
+		if (ab->b_flags & ARC_PREFETCH)
+			ab->b_flags &= ~ARC_PREFETCH;
+	}
+}
+
+static int
+remove_reference(arc_buf_hdr_t *ab, kmutex_t *hash_lock, void *tag)
+{
+	int cnt;
+	arc_state_t *state = ab->b_state;
+
+	ASSERT(state == arc_anon || MUTEX_HELD(hash_lock));
+	ASSERT(!GHOST_STATE(state));
+
+	if (((cnt = refcount_remove(&ab->b_refcnt, tag)) == 0) &&
+	    (state != arc_anon)) {
+		uint64_t *size = &state->arcs_lsize[ab->b_type];
+
+		ASSERT(!MUTEX_HELD(&state->arcs_mtx));
+		mutex_enter(&state->arcs_mtx);
+		ASSERT(!list_link_active(&ab->b_arc_node));
+		list_insert_head(&state->arcs_list[ab->b_type], ab);
+		ASSERT(ab->b_datacnt > 0);
+		atomic_add_64(size, ab->b_size * ab->b_datacnt);
+		mutex_exit(&state->arcs_mtx);
+	}
+	return (cnt);
+}
+
+/*
+ * Move the supplied buffer to the indicated state.  The mutex
+ * for the buffer must be held by the caller.
+ */
+static void
+arc_change_state(arc_state_t *new_state, arc_buf_hdr_t *ab, kmutex_t *hash_lock)
+{
+	arc_state_t *old_state = ab->b_state;
+	int64_t refcnt = refcount_count(&ab->b_refcnt);
+	uint64_t from_delta, to_delta;
+
+	ASSERT(MUTEX_HELD(hash_lock));
+	ASSERT(new_state != old_state);
+	ASSERT(refcnt == 0 || ab->b_datacnt > 0);
+	ASSERT(ab->b_datacnt == 0 || !GHOST_STATE(new_state));
+	ASSERT(ab->b_datacnt <= 1 || old_state != arc_anon);
+
+	from_delta = to_delta = ab->b_datacnt * ab->b_size;
+
+	/*
+	 * If this buffer is evictable, transfer it from the
+	 * old state list to the new state list.
+	 */
+	if (refcnt == 0) {
+		if (old_state != arc_anon) {
+			int use_mutex = !MUTEX_HELD(&old_state->arcs_mtx);
+			uint64_t *size = &old_state->arcs_lsize[ab->b_type];
+
+			if (use_mutex)
+				mutex_enter(&old_state->arcs_mtx);
+
+			ASSERT(list_link_active(&ab->b_arc_node));
+			list_remove(&old_state->arcs_list[ab->b_type], ab);
+
+			/*
+			 * If prefetching out of the ghost cache,
+			 * we will have a non-zero datacnt.
+			 */
+			if (GHOST_STATE(old_state) && ab->b_datacnt == 0) {
+				/* ghost elements have a ghost size */
+				ASSERT(ab->b_buf == NULL);
+				from_delta = ab->b_size;
+			}
+			ASSERT3U(*size, >=, from_delta);
+			atomic_add_64(size, -from_delta);
+
+			if (use_mutex)
+				mutex_exit(&old_state->arcs_mtx);
+		}
+		if (new_state != arc_anon) {
+			int use_mutex = !MUTEX_HELD(&new_state->arcs_mtx);
+			uint64_t *size = &new_state->arcs_lsize[ab->b_type];
+
+			if (use_mutex)
+				mutex_enter(&new_state->arcs_mtx);
+
+			list_insert_head(&new_state->arcs_list[ab->b_type], ab);
+
+			/* ghost elements have a ghost size */
+			if (GHOST_STATE(new_state)) {
+				ASSERT(ab->b_datacnt == 0);
+				ASSERT(ab->b_buf == NULL);
+				to_delta = ab->b_size;
+			}
+			atomic_add_64(size, to_delta);
+
+			if (use_mutex)
+				mutex_exit(&new_state->arcs_mtx);
+		}
+	}
+
+	ASSERT(!BUF_EMPTY(ab));
+	if (new_state == arc_anon && HDR_IN_HASH_TABLE(ab))
+		buf_hash_remove(ab);
+
+	/* adjust state sizes */
+	if (to_delta)
+		atomic_add_64(&new_state->arcs_size, to_delta);
+	if (from_delta) {
+		ASSERT3U(old_state->arcs_size, >=, from_delta);
+		atomic_add_64(&old_state->arcs_size, -from_delta);
+	}
+	ab->b_state = new_state;
+
+	/* adjust l2arc hdr stats */
+	if (new_state == arc_l2c_only)
+		l2arc_hdr_stat_add();
+	else if (old_state == arc_l2c_only)
+		l2arc_hdr_stat_remove();
+}
+
+void
+arc_space_consume(uint64_t space, arc_space_type_t type)
+{
+	ASSERT(type >= 0 && type < ARC_SPACE_NUMTYPES);
+
+	switch (type) {
+	case ARC_SPACE_DATA:
+		ARCSTAT_INCR(arcstat_data_size, space);
+		break;
+	case ARC_SPACE_OTHER:
+		ARCSTAT_INCR(arcstat_other_size, space);
+		break;
+	case ARC_SPACE_HDRS:
+		ARCSTAT_INCR(arcstat_hdr_size, space);
+		break;
+	case ARC_SPACE_L2HDRS:
+		ARCSTAT_INCR(arcstat_l2_hdr_size, space);
+		break;
+	}
+
+	atomic_add_64(&arc_meta_used, space);
+	atomic_add_64(&arc_size, space);
+}
+
+void
+arc_space_return(uint64_t space, arc_space_type_t type)
+{
+	ASSERT(type >= 0 && type < ARC_SPACE_NUMTYPES);
+
+	switch (type) {
+	case ARC_SPACE_DATA:
+		ARCSTAT_INCR(arcstat_data_size, -space);
+		break;
+	case ARC_SPACE_OTHER:
+		ARCSTAT_INCR(arcstat_other_size, -space);
+		break;
+	case ARC_SPACE_HDRS:
+		ARCSTAT_INCR(arcstat_hdr_size, -space);
+		break;
+	case ARC_SPACE_L2HDRS:
+		ARCSTAT_INCR(arcstat_l2_hdr_size, -space);
+		break;
+	}
+
+	ASSERT(arc_meta_used >= space);
+	if (arc_meta_max < arc_meta_used)
+		arc_meta_max = arc_meta_used;
+	atomic_add_64(&arc_meta_used, -space);
+	ASSERT(arc_size >= space);
+	atomic_add_64(&arc_size, -space);
+}
+
+void *
+arc_data_buf_alloc(uint64_t size)
+{
+	if (arc_evict_needed(ARC_BUFC_DATA))
+		cv_signal(&arc_reclaim_thr_cv);
+	atomic_add_64(&arc_size, size);
+	return (zio_data_buf_alloc(size));
+}
+
+void
+arc_data_buf_free(void *buf, uint64_t size)
+{
+	zio_data_buf_free(buf, size);
+	ASSERT(arc_size >= size);
+	atomic_add_64(&arc_size, -size);
+}
+
+arc_buf_t *
+arc_buf_alloc(spa_t *spa, int size, void *tag, arc_buf_contents_t type)
+{
+	arc_buf_hdr_t *hdr;
+	arc_buf_t *buf;
+
+	ASSERT3U(size, >, 0);
+	hdr = kmem_cache_alloc(hdr_cache, KM_PUSHPAGE);
+	ASSERT(BUF_EMPTY(hdr));
+	hdr->b_size = size;
+	hdr->b_type = type;
+	hdr->b_spa = spa_guid(spa);
+	hdr->b_state = arc_anon;
+	hdr->b_arc_access = 0;
+	buf = kmem_cache_alloc(buf_cache, KM_PUSHPAGE);
+	buf->b_hdr = hdr;
+	buf->b_data = NULL;
+	buf->b_efunc = NULL;
+	buf->b_private = NULL;
+	buf->b_next = NULL;
+	hdr->b_buf = buf;
+	arc_get_data_buf(buf);
+	hdr->b_datacnt = 1;
+	hdr->b_flags = 0;
+	ASSERT(refcount_is_zero(&hdr->b_refcnt));
+	(void) refcount_add(&hdr->b_refcnt, tag);
+
+	return (buf);
+}
+
+static char *arc_onloan_tag = "onloan";
+
+/*
+ * Loan out an anonymous arc buffer. Loaned buffers are not counted as in
+ * flight data by arc_tempreserve_space() until they are "returned". Loaned
+ * buffers must be returned to the arc before they can be used by the DMU or
+ * freed.
+ */
+arc_buf_t *
+arc_loan_buf(spa_t *spa, int size)
+{
+	arc_buf_t *buf;
+
+	buf = arc_buf_alloc(spa, size, arc_onloan_tag, ARC_BUFC_DATA);
+
+	atomic_add_64(&arc_loaned_bytes, size);
+	return (buf);
+}
+
+/*
+ * Return a loaned arc buffer to the arc.
+ */
+void
+arc_return_buf(arc_buf_t *buf, void *tag)
+{
+	arc_buf_hdr_t *hdr = buf->b_hdr;
+
+	ASSERT(buf->b_data != NULL);
+	(void) refcount_add(&hdr->b_refcnt, tag);
+	(void) refcount_remove(&hdr->b_refcnt, arc_onloan_tag);
+
+	atomic_add_64(&arc_loaned_bytes, -hdr->b_size);
+}
+
+/* Detach an arc_buf from a dbuf (tag) */
+void
+arc_loan_inuse_buf(arc_buf_t *buf, void *tag)
+{
+	arc_buf_hdr_t *hdr;
+
+	ASSERT(buf->b_data != NULL);
+	hdr = buf->b_hdr;
+	(void) refcount_add(&hdr->b_refcnt, arc_onloan_tag);
+	(void) refcount_remove(&hdr->b_refcnt, tag);
+	buf->b_efunc = NULL;
+	buf->b_private = NULL;
+
+	atomic_add_64(&arc_loaned_bytes, hdr->b_size);
+}
+
+static arc_buf_t *
+arc_buf_clone(arc_buf_t *from)
+{
+	arc_buf_t *buf;
+	arc_buf_hdr_t *hdr = from->b_hdr;
+	uint64_t size = hdr->b_size;
+
+	ASSERT(hdr->b_state != arc_anon);
+
+	buf = kmem_cache_alloc(buf_cache, KM_PUSHPAGE);
+	buf->b_hdr = hdr;
+	buf->b_data = NULL;
+	buf->b_efunc = NULL;
+	buf->b_private = NULL;
+	buf->b_next = hdr->b_buf;
+	hdr->b_buf = buf;
+	arc_get_data_buf(buf);
+	bcopy(from->b_data, buf->b_data, size);
+	hdr->b_datacnt += 1;
+	return (buf);
+}
+
+void
+arc_buf_add_ref(arc_buf_t *buf, void* tag)
+{
+	arc_buf_hdr_t *hdr;
+	kmutex_t *hash_lock;
+
+	/*
+	 * Check to see if this buffer is evicted.  Callers
+	 * must verify b_data != NULL to know if the add_ref
+	 * was successful.
+	 */
+	mutex_enter(&buf->b_evict_lock);
+	if (buf->b_data == NULL) {
+		mutex_exit(&buf->b_evict_lock);
+		return;
+	}
+	hash_lock = HDR_LOCK(buf->b_hdr);
+	mutex_enter(hash_lock);
+	hdr = buf->b_hdr;
+	ASSERT3P(hash_lock, ==, HDR_LOCK(hdr));
+	mutex_exit(&buf->b_evict_lock);
+
+	ASSERT(hdr->b_state == arc_mru || hdr->b_state == arc_mfu);
+	add_reference(hdr, hash_lock, tag);
+	DTRACE_PROBE1(arc__hit, arc_buf_hdr_t *, hdr);
+	arc_access(hdr, hash_lock);
+	mutex_exit(hash_lock);
+	ARCSTAT_BUMP(arcstat_hits);
+	ARCSTAT_CONDSTAT(!(hdr->b_flags & ARC_PREFETCH),
+	    demand, prefetch, hdr->b_type != ARC_BUFC_METADATA,
+	    data, metadata, hits);
+}
+
+/*
+ * Free the arc data buffer.  If it is an l2arc write in progress,
+ * the buffer is placed on l2arc_free_on_write to be freed later.
+ */
+static void
+arc_buf_data_free(arc_buf_hdr_t *hdr, void (*free_func)(void *, size_t),
+    void *data, size_t size)
+{
+	if (HDR_L2_WRITING(hdr)) {
+		l2arc_data_free_t *df;
+		df = kmem_alloc(sizeof (l2arc_data_free_t), KM_SLEEP);
+		df->l2df_data = data;
+		df->l2df_size = size;
+		df->l2df_func = free_func;
+		mutex_enter(&l2arc_free_on_write_mtx);
+		list_insert_head(l2arc_free_on_write, df);
+		mutex_exit(&l2arc_free_on_write_mtx);
+		ARCSTAT_BUMP(arcstat_l2_free_on_write);
+	} else {
+		free_func(data, size);
+	}
+}
+
+static void
+arc_buf_destroy(arc_buf_t *buf, boolean_t recycle, boolean_t all)
+{
+	arc_buf_t **bufp;
+
+	/* free up data associated with the buf */
+	if (buf->b_data) {
+		arc_state_t *state = buf->b_hdr->b_state;
+		uint64_t size = buf->b_hdr->b_size;
+		arc_buf_contents_t type = buf->b_hdr->b_type;
+
+		arc_cksum_verify(buf);
+
+		if (!recycle) {
+			if (type == ARC_BUFC_METADATA) {
+				arc_buf_data_free(buf->b_hdr, zio_buf_free,
+				    buf->b_data, size);
+				arc_space_return(size, ARC_SPACE_DATA);
+			} else {
+				ASSERT(type == ARC_BUFC_DATA);
+				arc_buf_data_free(buf->b_hdr,
+				    zio_data_buf_free, buf->b_data, size);
+				ARCSTAT_INCR(arcstat_data_size, -size);
+				atomic_add_64(&arc_size, -size);
+			}
+		}
+		if (list_link_active(&buf->b_hdr->b_arc_node)) {
+			uint64_t *cnt = &state->arcs_lsize[type];
+
+			ASSERT(refcount_is_zero(&buf->b_hdr->b_refcnt));
+			ASSERT(state != arc_anon);
+
+			ASSERT3U(*cnt, >=, size);
+			atomic_add_64(cnt, -size);
+		}
+		ASSERT3U(state->arcs_size, >=, size);
+		atomic_add_64(&state->arcs_size, -size);
+		buf->b_data = NULL;
+		ASSERT(buf->b_hdr->b_datacnt > 0);
+		buf->b_hdr->b_datacnt -= 1;
+	}
+
+	/* only remove the buf if requested */
+	if (!all)
+		return;
+
+	/* remove the buf from the hdr list */
+	for (bufp = &buf->b_hdr->b_buf; *bufp != buf; bufp = &(*bufp)->b_next)
+		continue;
+	*bufp = buf->b_next;
+	buf->b_next = NULL;
+
+	ASSERT(buf->b_efunc == NULL);
+
+	/* clean up the buf */
+	buf->b_hdr = NULL;
+	kmem_cache_free(buf_cache, buf);
+}
+
+static void
+arc_hdr_destroy(arc_buf_hdr_t *hdr)
+{
+	ASSERT(refcount_is_zero(&hdr->b_refcnt));
+	ASSERT3P(hdr->b_state, ==, arc_anon);
+	ASSERT(!HDR_IO_IN_PROGRESS(hdr));
+	l2arc_buf_hdr_t *l2hdr = hdr->b_l2hdr;
+
+	if (l2hdr != NULL) {
+		boolean_t buflist_held = MUTEX_HELD(&l2arc_buflist_mtx);
+		/*
+		 * To prevent arc_free() and l2arc_evict() from
+		 * attempting to free the same buffer at the same time,
+		 * a FREE_IN_PROGRESS flag is given to arc_free() to
+		 * give it priority.  l2arc_evict() can't destroy this
+		 * header while we are waiting on l2arc_buflist_mtx.
+		 *
+		 * The hdr may be removed from l2ad_buflist before we
+		 * grab l2arc_buflist_mtx, so b_l2hdr is rechecked.
+		 */
+		if (!buflist_held) {
+			mutex_enter(&l2arc_buflist_mtx);
+			l2hdr = hdr->b_l2hdr;
+		}
+
+		if (l2hdr != NULL) {
+			list_remove(l2hdr->b_dev->l2ad_buflist, hdr);
+			ARCSTAT_INCR(arcstat_l2_size, -hdr->b_size);
+			kmem_free(l2hdr, sizeof (l2arc_buf_hdr_t));
+			if (hdr->b_state == arc_l2c_only)
+				l2arc_hdr_stat_remove();
+			hdr->b_l2hdr = NULL;
+		}
+
+		if (!buflist_held)
+			mutex_exit(&l2arc_buflist_mtx);
+	}
+
+	if (!BUF_EMPTY(hdr)) {
+		ASSERT(!HDR_IN_HASH_TABLE(hdr));
+		buf_discard_identity(hdr);
+	}
+	while (hdr->b_buf) {
+		arc_buf_t *buf = hdr->b_buf;
+
+		if (buf->b_efunc) {
+			mutex_enter(&arc_eviction_mtx);
+			mutex_enter(&buf->b_evict_lock);
+			ASSERT(buf->b_hdr != NULL);
+			arc_buf_destroy(hdr->b_buf, FALSE, FALSE);
+			hdr->b_buf = buf->b_next;
+			buf->b_hdr = &arc_eviction_hdr;
+			buf->b_next = arc_eviction_list;
+			arc_eviction_list = buf;
+			mutex_exit(&buf->b_evict_lock);
+			mutex_exit(&arc_eviction_mtx);
+		} else {
+			arc_buf_destroy(hdr->b_buf, FALSE, TRUE);
+		}
+	}
+	if (hdr->b_freeze_cksum != NULL) {
+		kmem_free(hdr->b_freeze_cksum, sizeof (zio_cksum_t));
+		hdr->b_freeze_cksum = NULL;
+	}
+	if (hdr->b_thawed) {
+		kmem_free(hdr->b_thawed, 1);
+		hdr->b_thawed = NULL;
+	}
+
+	ASSERT(!list_link_active(&hdr->b_arc_node));
+	ASSERT3P(hdr->b_hash_next, ==, NULL);
+	ASSERT3P(hdr->b_acb, ==, NULL);
+	kmem_cache_free(hdr_cache, hdr);
+}
+
+void
+arc_buf_free(arc_buf_t *buf, void *tag)
+{
+	arc_buf_hdr_t *hdr = buf->b_hdr;
+	int hashed = hdr->b_state != arc_anon;
+
+	ASSERT(buf->b_efunc == NULL);
+	ASSERT(buf->b_data != NULL);
+
+	if (hashed) {
+		kmutex_t *hash_lock = HDR_LOCK(hdr);
+
+		mutex_enter(hash_lock);
+		hdr = buf->b_hdr;
+		ASSERT3P(hash_lock, ==, HDR_LOCK(hdr));
+
+		(void) remove_reference(hdr, hash_lock, tag);
+		if (hdr->b_datacnt > 1) {
+			arc_buf_destroy(buf, FALSE, TRUE);
+		} else {
+			ASSERT(buf == hdr->b_buf);
+			ASSERT(buf->b_efunc == NULL);
+			hdr->b_flags |= ARC_BUF_AVAILABLE;
+		}
+		mutex_exit(hash_lock);
+	} else if (HDR_IO_IN_PROGRESS(hdr)) {
+		int destroy_hdr;
+		/*
+		 * We are in the middle of an async write.  Don't destroy
+		 * this buffer unless the write completes before we finish
+		 * decrementing the reference count.
+		 */
+		mutex_enter(&arc_eviction_mtx);
+		(void) remove_reference(hdr, NULL, tag);
+		ASSERT(refcount_is_zero(&hdr->b_refcnt));
+		destroy_hdr = !HDR_IO_IN_PROGRESS(hdr);
+		mutex_exit(&arc_eviction_mtx);
+		if (destroy_hdr)
+			arc_hdr_destroy(hdr);
+	} else {
+		if (remove_reference(hdr, NULL, tag) > 0)
+			arc_buf_destroy(buf, FALSE, TRUE);
+		else
+			arc_hdr_destroy(hdr);
+	}
+}
+
+int
+arc_buf_remove_ref(arc_buf_t *buf, void* tag)
+{
+	arc_buf_hdr_t *hdr = buf->b_hdr;
+	kmutex_t *hash_lock = HDR_LOCK(hdr);
+	int no_callback = (buf->b_efunc == NULL);
+
+	if (hdr->b_state == arc_anon) {
+		ASSERT(hdr->b_datacnt == 1);
+		arc_buf_free(buf, tag);
+		return (no_callback);
+	}
+
+	mutex_enter(hash_lock);
+	hdr = buf->b_hdr;
+	ASSERT3P(hash_lock, ==, HDR_LOCK(hdr));
+	ASSERT(hdr->b_state != arc_anon);
+	ASSERT(buf->b_data != NULL);
+
+	(void) remove_reference(hdr, hash_lock, tag);
+	if (hdr->b_datacnt > 1) {
+		if (no_callback)
+			arc_buf_destroy(buf, FALSE, TRUE);
+	} else if (no_callback) {
+		ASSERT(hdr->b_buf == buf && buf->b_next == NULL);
+		ASSERT(buf->b_efunc == NULL);
+		hdr->b_flags |= ARC_BUF_AVAILABLE;
+	}
+	ASSERT(no_callback || hdr->b_datacnt > 1 ||
+	    refcount_is_zero(&hdr->b_refcnt));
+	mutex_exit(hash_lock);
+	return (no_callback);
+}
+
+int
+arc_buf_size(arc_buf_t *buf)
+{
+	return (buf->b_hdr->b_size);
+}
+
+/*
+ * Evict buffers from list until we've removed the specified number of
+ * bytes.  Move the removed buffers to the appropriate evict state.
+ * If the recycle flag is set, then attempt to "recycle" a buffer:
+ * - look for a buffer to evict that is `bytes' long.
+ * - return the data block from this buffer rather than freeing it.
+ * This flag is used by callers that are trying to make space for a
+ * new buffer in a full arc cache.
+ *
+ * This function makes a "best effort".  It skips over any buffers
+ * it can't get a hash_lock on, and so may not catch all candidates.
+ * It may also return without evicting as much space as requested.
+ */
+static void *
+arc_evict(arc_state_t *state, uint64_t spa, int64_t bytes, boolean_t recycle,
+    arc_buf_contents_t type)
+{
+	arc_state_t *evicted_state;
+	uint64_t bytes_evicted = 0, skipped = 0, missed = 0;
+	arc_buf_hdr_t *ab, *ab_prev = NULL;
+	list_t *list = &state->arcs_list[type];
+	kmutex_t *hash_lock;
+	boolean_t have_lock;
+	void *stolen = NULL;
+
+	ASSERT(state == arc_mru || state == arc_mfu);
+
+	evicted_state = (state == arc_mru) ? arc_mru_ghost : arc_mfu_ghost;
+
+	mutex_enter(&state->arcs_mtx);
+	mutex_enter(&evicted_state->arcs_mtx);
+
+	for (ab = list_tail(list); ab; ab = ab_prev) {
+		ab_prev = list_prev(list, ab);
+		/* prefetch buffers have a minimum lifespan */
+		if (HDR_IO_IN_PROGRESS(ab) ||
+		    (spa && ab->b_spa != spa) ||
+		    (ab->b_flags & (ARC_PREFETCH|ARC_INDIRECT) &&
+		    ddi_get_lbolt() - ab->b_arc_access <
+		    arc_min_prefetch_lifespan)) {
+			skipped++;
+			continue;
+		}
+		/* "lookahead" for better eviction candidate */
+		if (recycle && ab->b_size != bytes &&
+		    ab_prev && ab_prev->b_size == bytes)
+			continue;
+		hash_lock = HDR_LOCK(ab);
+		have_lock = MUTEX_HELD(hash_lock);
+		if (have_lock || mutex_tryenter(hash_lock)) {
+			ASSERT3U(refcount_count(&ab->b_refcnt), ==, 0);
+			ASSERT(ab->b_datacnt > 0);
+			while (ab->b_buf) {
+				arc_buf_t *buf = ab->b_buf;
+				if (!mutex_tryenter(&buf->b_evict_lock)) {
+					missed += 1;
+					break;
+				}
+				if (buf->b_data) {
+					bytes_evicted += ab->b_size;
+					if (recycle && ab->b_type == type &&
+					    ab->b_size == bytes &&
+					    !HDR_L2_WRITING(ab)) {
+						stolen = buf->b_data;
+						recycle = FALSE;
+					}
+				}
+				if (buf->b_efunc) {
+					mutex_enter(&arc_eviction_mtx);
+					arc_buf_destroy(buf,
+					    buf->b_data == stolen, FALSE);
+					ab->b_buf = buf->b_next;
+					buf->b_hdr = &arc_eviction_hdr;
+					buf->b_next = arc_eviction_list;
+					arc_eviction_list = buf;
+					mutex_exit(&arc_eviction_mtx);
+					mutex_exit(&buf->b_evict_lock);
+				} else {
+					mutex_exit(&buf->b_evict_lock);
+					arc_buf_destroy(buf,
+					    buf->b_data == stolen, TRUE);
+				}
+			}
+
+			if (ab->b_l2hdr) {
+				ARCSTAT_INCR(arcstat_evict_l2_cached,
+				    ab->b_size);
+			} else {
+				if (l2arc_write_eligible(ab->b_spa, ab)) {
+					ARCSTAT_INCR(arcstat_evict_l2_eligible,
+					    ab->b_size);
+				} else {
+					ARCSTAT_INCR(
+					    arcstat_evict_l2_ineligible,
+					    ab->b_size);
+				}
+			}
+
+			if (ab->b_datacnt == 0) {
+				arc_change_state(evicted_state, ab, hash_lock);
+				ASSERT(HDR_IN_HASH_TABLE(ab));
+				ab->b_flags |= ARC_IN_HASH_TABLE;
+				ab->b_flags &= ~ARC_BUF_AVAILABLE;
+				DTRACE_PROBE1(arc__evict, arc_buf_hdr_t *, ab);
+			}
+			if (!have_lock)
+				mutex_exit(hash_lock);
+			if (bytes >= 0 && bytes_evicted >= bytes)
+				break;
+		} else {
+			missed += 1;
+		}
+	}
+
+	mutex_exit(&evicted_state->arcs_mtx);
+	mutex_exit(&state->arcs_mtx);
+
+	if (bytes_evicted < bytes)
+		dprintf("only evicted %lld bytes from %x",
+		    (longlong_t)bytes_evicted, state);
+
+	if (skipped)
+		ARCSTAT_INCR(arcstat_evict_skip, skipped);
+
+	if (missed)
+		ARCSTAT_INCR(arcstat_mutex_miss, missed);
+
+	/*
+	 * We have just evicted some date into the ghost state, make
+	 * sure we also adjust the ghost state size if necessary.
+	 */
+	if (arc_no_grow &&
+	    arc_mru_ghost->arcs_size + arc_mfu_ghost->arcs_size > arc_c) {
+		int64_t mru_over = arc_anon->arcs_size + arc_mru->arcs_size +
+		    arc_mru_ghost->arcs_size - arc_c;
+
+		if (mru_over > 0 && arc_mru_ghost->arcs_lsize[type] > 0) {
+			int64_t todelete =
+			    MIN(arc_mru_ghost->arcs_lsize[type], mru_over);
+			arc_evict_ghost(arc_mru_ghost, NULL, todelete);
+		} else if (arc_mfu_ghost->arcs_lsize[type] > 0) {
+			int64_t todelete = MIN(arc_mfu_ghost->arcs_lsize[type],
+			    arc_mru_ghost->arcs_size +
+			    arc_mfu_ghost->arcs_size - arc_c);
+			arc_evict_ghost(arc_mfu_ghost, NULL, todelete);
+		}
+	}
+
+	return (stolen);
+}
+
+/*
+ * Remove buffers from list until we've removed the specified number of
+ * bytes.  Destroy the buffers that are removed.
+ */
+static void
+arc_evict_ghost(arc_state_t *state, uint64_t spa, int64_t bytes)
+{
+	arc_buf_hdr_t *ab, *ab_prev;
+	arc_buf_hdr_t marker = { 0 };
+	list_t *list = &state->arcs_list[ARC_BUFC_DATA];
+	kmutex_t *hash_lock;
+	uint64_t bytes_deleted = 0;
+	uint64_t bufs_skipped = 0;
+
+	ASSERT(GHOST_STATE(state));
+top:
+	mutex_enter(&state->arcs_mtx);
+	for (ab = list_tail(list); ab; ab = ab_prev) {
+		ab_prev = list_prev(list, ab);
+		if (spa && ab->b_spa != spa)
+			continue;
+
+		/* ignore markers */
+		if (ab->b_spa == 0)
+			continue;
+
+		hash_lock = HDR_LOCK(ab);
+		/* caller may be trying to modify this buffer, skip it */
+		if (MUTEX_HELD(hash_lock))
+			continue;
+		if (mutex_tryenter(hash_lock)) {
+			ASSERT(!HDR_IO_IN_PROGRESS(ab));
+			ASSERT(ab->b_buf == NULL);
+			ARCSTAT_BUMP(arcstat_deleted);
+			bytes_deleted += ab->b_size;
+
+			if (ab->b_l2hdr != NULL) {
+				/*
+				 * This buffer is cached on the 2nd Level ARC;
+				 * don't destroy the header.
+				 */
+				arc_change_state(arc_l2c_only, ab, hash_lock);
+				mutex_exit(hash_lock);
+			} else {
+				arc_change_state(arc_anon, ab, hash_lock);
+				mutex_exit(hash_lock);
+				arc_hdr_destroy(ab);
+			}
+
+			DTRACE_PROBE1(arc__delete, arc_buf_hdr_t *, ab);
+			if (bytes >= 0 && bytes_deleted >= bytes)
+				break;
+		} else if (bytes < 0) {
+			/*
+			 * Insert a list marker and then wait for the
+			 * hash lock to become available. Once its
+			 * available, restart from where we left off.
+			 */
+			list_insert_after(list, ab, &marker);
+			mutex_exit(&state->arcs_mtx);
+			mutex_enter(hash_lock);
+			mutex_exit(hash_lock);
+			mutex_enter(&state->arcs_mtx);
+			ab_prev = list_prev(list, &marker);
+			list_remove(list, &marker);
+		} else
+			bufs_skipped += 1;
+	}
+	mutex_exit(&state->arcs_mtx);
+
+	if (list == &state->arcs_list[ARC_BUFC_DATA] &&
+	    (bytes < 0 || bytes_deleted < bytes)) {
+		list = &state->arcs_list[ARC_BUFC_METADATA];
+		goto top;
+	}
+
+	if (bufs_skipped) {
+		ARCSTAT_INCR(arcstat_mutex_miss, bufs_skipped);
+		ASSERT(bytes >= 0);
+	}
+
+	if (bytes_deleted < bytes)
+		dprintf("only deleted %lld bytes from %p",
+		    (longlong_t)bytes_deleted, state);
+}
+
+static void
+arc_adjust(void)
+{
+	int64_t adjustment, delta;
+
+	/*
+	 * Adjust MRU size
+	 */
+
+	adjustment = MIN((int64_t)(arc_size - arc_c),
+	    (int64_t)(arc_anon->arcs_size + arc_mru->arcs_size + arc_meta_used -
+	    arc_p));
+
+	if (adjustment > 0 && arc_mru->arcs_lsize[ARC_BUFC_DATA] > 0) {
+		delta = MIN(arc_mru->arcs_lsize[ARC_BUFC_DATA], adjustment);
+		(void) arc_evict(arc_mru, NULL, delta, FALSE, ARC_BUFC_DATA);
+		adjustment -= delta;
+	}
+
+	if (adjustment > 0 && arc_mru->arcs_lsize[ARC_BUFC_METADATA] > 0) {
+		delta = MIN(arc_mru->arcs_lsize[ARC_BUFC_METADATA], adjustment);
+		(void) arc_evict(arc_mru, NULL, delta, FALSE,
+		    ARC_BUFC_METADATA);
+	}
+
+	/*
+	 * Adjust MFU size
+	 */
+
+	adjustment = arc_size - arc_c;
+
+	if (adjustment > 0 && arc_mfu->arcs_lsize[ARC_BUFC_DATA] > 0) {
+		delta = MIN(adjustment, arc_mfu->arcs_lsize[ARC_BUFC_DATA]);
+		(void) arc_evict(arc_mfu, NULL, delta, FALSE, ARC_BUFC_DATA);
+		adjustment -= delta;
+	}
+
+	if (adjustment > 0 && arc_mfu->arcs_lsize[ARC_BUFC_METADATA] > 0) {
+		int64_t delta = MIN(adjustment,
+		    arc_mfu->arcs_lsize[ARC_BUFC_METADATA]);
+		(void) arc_evict(arc_mfu, NULL, delta, FALSE,
+		    ARC_BUFC_METADATA);
+	}
+
+	/*
+	 * Adjust ghost lists
+	 */
+
+	adjustment = arc_mru->arcs_size + arc_mru_ghost->arcs_size - arc_c;
+
+	if (adjustment > 0 && arc_mru_ghost->arcs_size > 0) {
+		delta = MIN(arc_mru_ghost->arcs_size, adjustment);
+		arc_evict_ghost(arc_mru_ghost, NULL, delta);
+	}
+
+	adjustment =
+	    arc_mru_ghost->arcs_size + arc_mfu_ghost->arcs_size - arc_c;
+
+	if (adjustment > 0 && arc_mfu_ghost->arcs_size > 0) {
+		delta = MIN(arc_mfu_ghost->arcs_size, adjustment);
+		arc_evict_ghost(arc_mfu_ghost, NULL, delta);
+	}
+}
+
+static void
+arc_do_user_evicts(void)
+{
+	mutex_enter(&arc_eviction_mtx);
+	while (arc_eviction_list != NULL) {
+		arc_buf_t *buf = arc_eviction_list;
+		arc_eviction_list = buf->b_next;
+		mutex_enter(&buf->b_evict_lock);
+		buf->b_hdr = NULL;
+		mutex_exit(&buf->b_evict_lock);
+		mutex_exit(&arc_eviction_mtx);
+
+		if (buf->b_efunc != NULL)
+			VERIFY(buf->b_efunc(buf) == 0);
+
+		buf->b_efunc = NULL;
+		buf->b_private = NULL;
+		kmem_cache_free(buf_cache, buf);
+		mutex_enter(&arc_eviction_mtx);
+	}
+	mutex_exit(&arc_eviction_mtx);
+}
+
+/*
+ * Flush all *evictable* data from the cache for the given spa.
+ * NOTE: this will not touch "active" (i.e. referenced) data.
+ */
+void
+arc_flush(spa_t *spa)
+{
+	uint64_t guid = 0;
+
+	if (spa)
+		guid = spa_guid(spa);
+
+	while (list_head(&arc_mru->arcs_list[ARC_BUFC_DATA])) {
+		(void) arc_evict(arc_mru, guid, -1, FALSE, ARC_BUFC_DATA);
+		if (spa)
+			break;
+	}
+	while (list_head(&arc_mru->arcs_list[ARC_BUFC_METADATA])) {
+		(void) arc_evict(arc_mru, guid, -1, FALSE, ARC_BUFC_METADATA);
+		if (spa)
+			break;
+	}
+	while (list_head(&arc_mfu->arcs_list[ARC_BUFC_DATA])) {
+		(void) arc_evict(arc_mfu, guid, -1, FALSE, ARC_BUFC_DATA);
+		if (spa)
+			break;
+	}
+	while (list_head(&arc_mfu->arcs_list[ARC_BUFC_METADATA])) {
+		(void) arc_evict(arc_mfu, guid, -1, FALSE, ARC_BUFC_METADATA);
+		if (spa)
+			break;
+	}
+
+	arc_evict_ghost(arc_mru_ghost, guid, -1);
+	arc_evict_ghost(arc_mfu_ghost, guid, -1);
+
+	mutex_enter(&arc_reclaim_thr_lock);
+	arc_do_user_evicts();
+	mutex_exit(&arc_reclaim_thr_lock);
+	ASSERT(spa || arc_eviction_list == NULL);
+}
+
+void
+arc_shrink(void)
+{
+	if (arc_c > arc_c_min) {
+		uint64_t to_free;
+
+#ifdef _KERNEL
+		to_free = MAX(arc_c >> arc_shrink_shift, ptob(needfree));
+#else
+		to_free = arc_c >> arc_shrink_shift;
+#endif
+		if (arc_c > arc_c_min + to_free)
+			atomic_add_64(&arc_c, -to_free);
+		else
+			arc_c = arc_c_min;
+
+		atomic_add_64(&arc_p, -(arc_p >> arc_shrink_shift));
+		if (arc_c > arc_size)
+			arc_c = MAX(arc_size, arc_c_min);
+		if (arc_p > arc_c)
+			arc_p = (arc_c >> 1);
+		ASSERT(arc_c >= arc_c_min);
+		ASSERT((int64_t)arc_p >= 0);
+	}
+
+	if (arc_size > arc_c)
+		arc_adjust();
+}
+
+static int
+arc_reclaim_needed(void)
+{
+	uint64_t extra;
+
+#ifdef _KERNEL
+
+	if (needfree)
+		return (1);
+
+	/*
+	 * take 'desfree' extra pages, so we reclaim sooner, rather than later
+	 */
+	extra = desfree;
+
+	/*
+	 * check that we're out of range of the pageout scanner.  It starts to
+	 * schedule paging if freemem is less than lotsfree and needfree.
+	 * lotsfree is the high-water mark for pageout, and needfree is the
+	 * number of needed free pages.  We add extra pages here to make sure
+	 * the scanner doesn't start up while we're freeing memory.
+	 */
+	if (freemem < lotsfree + needfree + extra)
+		return (1);
+
+	/*
+	 * check to make sure that swapfs has enough space so that anon
+	 * reservations can still succeed. anon_resvmem() checks that the
+	 * availrmem is greater than swapfs_minfree, and the number of reserved
+	 * swap pages.  We also add a bit of extra here just to prevent
+	 * circumstances from getting really dire.
+	 */
+	if (availrmem < swapfs_minfree + swapfs_reserve + extra)
+		return (1);
+
+#if defined(__i386)
+	/*
+	 * If we're on an i386 platform, it's possible that we'll exhaust the
+	 * kernel heap space before we ever run out of available physical
+	 * memory.  Most checks of the size of the heap_area compare against
+	 * tune.t_minarmem, which is the minimum available real memory that we
+	 * can have in the system.  However, this is generally fixed at 25 pages
+	 * which is so low that it's useless.  In this comparison, we seek to
+	 * calculate the total heap-size, and reclaim if more than 3/4ths of the
+	 * heap is allocated.  (Or, in the calculation, if less than 1/4th is
+	 * free)
+	 */
+	if (btop(vmem_size(heap_arena, VMEM_FREE)) <
+	    (btop(vmem_size(heap_arena, VMEM_FREE | VMEM_ALLOC)) >> 2))
+		return (1);
+#endif
+
+#else
+	if (spa_get_random(100) == 0)
+		return (1);
+#endif
+	return (0);
+}
+
+static void
+arc_kmem_reap_now(arc_reclaim_strategy_t strat)
+{
+	size_t			i;
+	kmem_cache_t		*prev_cache = NULL;
+	kmem_cache_t		*prev_data_cache = NULL;
+	extern kmem_cache_t	*zio_buf_cache[];
+	extern kmem_cache_t	*zio_data_buf_cache[];
+
+#ifdef _KERNEL
+	if (arc_meta_used >= arc_meta_limit) {
+		/*
+		 * We are exceeding our meta-data cache limit.
+		 * Purge some DNLC entries to release holds on meta-data.
+		 */
+		dnlc_reduce_cache((void *)(uintptr_t)arc_reduce_dnlc_percent);
+	}
+#if defined(__i386)
+	/*
+	 * Reclaim unused memory from all kmem caches.
+	 */
+	kmem_reap();
+#endif
+#endif
+
+	/*
+	 * An aggressive reclamation will shrink the cache size as well as
+	 * reap free buffers from the arc kmem caches.
+	 */
+	if (strat == ARC_RECLAIM_AGGR)
+		arc_shrink();
+
+	for (i = 0; i < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; i++) {
+		if (zio_buf_cache[i] != prev_cache) {
+			prev_cache = zio_buf_cache[i];
+			kmem_cache_reap_now(zio_buf_cache[i]);
+		}
+		if (zio_data_buf_cache[i] != prev_data_cache) {
+			prev_data_cache = zio_data_buf_cache[i];
+			kmem_cache_reap_now(zio_data_buf_cache[i]);
+		}
+	}
+	kmem_cache_reap_now(buf_cache);
+	kmem_cache_reap_now(hdr_cache);
+}
+
+static void
+arc_reclaim_thread(void)
+{
+	clock_t			growtime = 0;
+	arc_reclaim_strategy_t	last_reclaim = ARC_RECLAIM_CONS;
+	callb_cpr_t		cpr;
+
+	CALLB_CPR_INIT(&cpr, &arc_reclaim_thr_lock, callb_generic_cpr, FTAG);
+
+	mutex_enter(&arc_reclaim_thr_lock);
+	while (arc_thread_exit == 0) {
+		if (arc_reclaim_needed()) {
+
+			if (arc_no_grow) {
+				if (last_reclaim == ARC_RECLAIM_CONS) {
+					last_reclaim = ARC_RECLAIM_AGGR;
+				} else {
+					last_reclaim = ARC_RECLAIM_CONS;
+				}
+			} else {
+				arc_no_grow = TRUE;
+				last_reclaim = ARC_RECLAIM_AGGR;
+				membar_producer();
+			}
+
+			/* reset the growth delay for every reclaim */
+			growtime = ddi_get_lbolt() + (arc_grow_retry * hz);
+
+			arc_kmem_reap_now(last_reclaim);
+			arc_warm = B_TRUE;
+
+		} else if (arc_no_grow && ddi_get_lbolt() >= growtime) {
+			arc_no_grow = FALSE;
+		}
+
+		arc_adjust();
+
+		if (arc_eviction_list != NULL)
+			arc_do_user_evicts();
+
+		/* block until needed, or one second, whichever is shorter */
+		CALLB_CPR_SAFE_BEGIN(&cpr);
+		(void) cv_timedwait(&arc_reclaim_thr_cv,
+		    &arc_reclaim_thr_lock, (ddi_get_lbolt() + hz));
+		CALLB_CPR_SAFE_END(&cpr, &arc_reclaim_thr_lock);
+	}
+
+	arc_thread_exit = 0;
+	cv_broadcast(&arc_reclaim_thr_cv);
+	CALLB_CPR_EXIT(&cpr);		/* drops arc_reclaim_thr_lock */
+	thread_exit();
+}
+
+/*
+ * Adapt arc info given the number of bytes we are trying to add and
+ * the state that we are comming from.  This function is only called
+ * when we are adding new content to the cache.
+ */
+static void
+arc_adapt(int bytes, arc_state_t *state)
+{
+	int mult;
+	uint64_t arc_p_min = (arc_c >> arc_p_min_shift);
+
+	if (state == arc_l2c_only)
+		return;
+
+	ASSERT(bytes > 0);
+	/*
+	 * Adapt the target size of the MRU list:
+	 *	- if we just hit in the MRU ghost list, then increase
+	 *	  the target size of the MRU list.
+	 *	- if we just hit in the MFU ghost list, then increase
+	 *	  the target size of the MFU list by decreasing the
+	 *	  target size of the MRU list.
+	 */
+	if (state == arc_mru_ghost) {
+		mult = ((arc_mru_ghost->arcs_size >= arc_mfu_ghost->arcs_size) ?
+		    1 : (arc_mfu_ghost->arcs_size/arc_mru_ghost->arcs_size));
+		mult = MIN(mult, 10); /* avoid wild arc_p adjustment */
+
+		arc_p = MIN(arc_c - arc_p_min, arc_p + bytes * mult);
+	} else if (state == arc_mfu_ghost) {
+		uint64_t delta;
+
+		mult = ((arc_mfu_ghost->arcs_size >= arc_mru_ghost->arcs_size) ?
+		    1 : (arc_mru_ghost->arcs_size/arc_mfu_ghost->arcs_size));
+		mult = MIN(mult, 10);
+
+		delta = MIN(bytes * mult, arc_p);
+		arc_p = MAX(arc_p_min, arc_p - delta);
+	}
+	ASSERT((int64_t)arc_p >= 0);
+
+	if (arc_reclaim_needed()) {
+		cv_signal(&arc_reclaim_thr_cv);
+		return;
+	}
+
+	if (arc_no_grow)
+		return;
+
+	if (arc_c >= arc_c_max)
+		return;
+
+	/*
+	 * If we're within (2 * maxblocksize) bytes of the target
+	 * cache size, increment the target cache size
+	 */
+	if (arc_size > arc_c - (2ULL << SPA_MAXBLOCKSHIFT)) {
+		atomic_add_64(&arc_c, (int64_t)bytes);
+		if (arc_c > arc_c_max)
+			arc_c = arc_c_max;
+		else if (state == arc_anon)
+			atomic_add_64(&arc_p, (int64_t)bytes);
+		if (arc_p > arc_c)
+			arc_p = arc_c;
+	}
+	ASSERT((int64_t)arc_p >= 0);
+}
+
+/*
+ * Check if the cache has reached its limits and eviction is required
+ * prior to insert.
+ */
+static int
+arc_evict_needed(arc_buf_contents_t type)
+{
+	if (type == ARC_BUFC_METADATA && arc_meta_used >= arc_meta_limit)
+		return (1);
+
+#ifdef _KERNEL
+	/*
+	 * If zio data pages are being allocated out of a separate heap segment,
+	 * then enforce that the size of available vmem for this area remains
+	 * above about 1/32nd free.
+	 */
+	if (type == ARC_BUFC_DATA && zio_arena != NULL &&
+	    vmem_size(zio_arena, VMEM_FREE) <
+	    (vmem_size(zio_arena, VMEM_ALLOC) >> 5))
+		return (1);
+#endif
+
+	if (arc_reclaim_needed())
+		return (1);
+
+	return (arc_size > arc_c);
+}
+
+/*
+ * The buffer, supplied as the first argument, needs a data block.
+ * So, if we are at cache max, determine which cache should be victimized.
+ * We have the following cases:
+ *
+ * 1. Insert for MRU, p > sizeof(arc_anon + arc_mru) ->
+ * In this situation if we're out of space, but the resident size of the MFU is
+ * under the limit, victimize the MFU cache to satisfy this insertion request.
+ *
+ * 2. Insert for MRU, p <= sizeof(arc_anon + arc_mru) ->
+ * Here, we've used up all of the available space for the MRU, so we need to
+ * evict from our own cache instead.  Evict from the set of resident MRU
+ * entries.
+ *
+ * 3. Insert for MFU (c - p) > sizeof(arc_mfu) ->
+ * c minus p represents the MFU space in the cache, since p is the size of the
+ * cache that is dedicated to the MRU.  In this situation there's still space on
+ * the MFU side, so the MRU side needs to be victimized.
+ *
+ * 4. Insert for MFU (c - p) < sizeof(arc_mfu) ->
+ * MFU's resident set is consuming more space than it has been allotted.  In
+ * this situation, we must victimize our own cache, the MFU, for this insertion.
+ */
+static void
+arc_get_data_buf(arc_buf_t *buf)
+{
+	arc_state_t		*state = buf->b_hdr->b_state;
+	uint64_t		size = buf->b_hdr->b_size;
+	arc_buf_contents_t	type = buf->b_hdr->b_type;
+
+	arc_adapt(size, state);
+
+	/*
+	 * We have not yet reached cache maximum size,
+	 * just allocate a new buffer.
+	 */
+	if (!arc_evict_needed(type)) {
+		if (type == ARC_BUFC_METADATA) {
+			buf->b_data = zio_buf_alloc(size);
+			arc_space_consume(size, ARC_SPACE_DATA);
+		} else {
+			ASSERT(type == ARC_BUFC_DATA);
+			buf->b_data = zio_data_buf_alloc(size);
+			ARCSTAT_INCR(arcstat_data_size, size);
+			atomic_add_64(&arc_size, size);
+		}
+		goto out;
+	}
+
+	/*
+	 * If we are prefetching from the mfu ghost list, this buffer
+	 * will end up on the mru list; so steal space from there.
+	 */
+	if (state == arc_mfu_ghost)
+		state = buf->b_hdr->b_flags & ARC_PREFETCH ? arc_mru : arc_mfu;
+	else if (state == arc_mru_ghost)
+		state = arc_mru;
+
+	if (state == arc_mru || state == arc_anon) {
+		uint64_t mru_used = arc_anon->arcs_size + arc_mru->arcs_size;
+		state = (arc_mfu->arcs_lsize[type] >= size &&
+		    arc_p > mru_used) ? arc_mfu : arc_mru;
+	} else {
+		/* MFU cases */
+		uint64_t mfu_space = arc_c - arc_p;
+		state =  (arc_mru->arcs_lsize[type] >= size &&
+		    mfu_space > arc_mfu->arcs_size) ? arc_mru : arc_mfu;
+	}
+	if ((buf->b_data = arc_evict(state, NULL, size, TRUE, type)) == NULL) {
+		if (type == ARC_BUFC_METADATA) {
+			buf->b_data = zio_buf_alloc(size);
+			arc_space_consume(size, ARC_SPACE_DATA);
+		} else {
+			ASSERT(type == ARC_BUFC_DATA);
+			buf->b_data = zio_data_buf_alloc(size);
+			ARCSTAT_INCR(arcstat_data_size, size);
+			atomic_add_64(&arc_size, size);
+		}
+		ARCSTAT_BUMP(arcstat_recycle_miss);
+	}
+	ASSERT(buf->b_data != NULL);
+out:
+	/*
+	 * Update the state size.  Note that ghost states have a
+	 * "ghost size" and so don't need to be updated.
+	 */
+	if (!GHOST_STATE(buf->b_hdr->b_state)) {
+		arc_buf_hdr_t *hdr = buf->b_hdr;
+
+		atomic_add_64(&hdr->b_state->arcs_size, size);
+		if (list_link_active(&hdr->b_arc_node)) {
+			ASSERT(refcount_is_zero(&hdr->b_refcnt));
+			atomic_add_64(&hdr->b_state->arcs_lsize[type], size);
+		}
+		/*
+		 * If we are growing the cache, and we are adding anonymous
+		 * data, and we have outgrown arc_p, update arc_p
+		 */
+		if (arc_size < arc_c && hdr->b_state == arc_anon &&
+		    arc_anon->arcs_size + arc_mru->arcs_size > arc_p)
+			arc_p = MIN(arc_c, arc_p + size);
+	}
+}
+
+/*
+ * This routine is called whenever a buffer is accessed.
+ * NOTE: the hash lock is dropped in this function.
+ */
+static void
+arc_access(arc_buf_hdr_t *buf, kmutex_t *hash_lock)
+{
+	clock_t now;
+
+	ASSERT(MUTEX_HELD(hash_lock));
+
+	if (buf->b_state == arc_anon) {
+		/*
+		 * This buffer is not in the cache, and does not
+		 * appear in our "ghost" list.  Add the new buffer
+		 * to the MRU state.
+		 */
+
+		ASSERT(buf->b_arc_access == 0);
+		buf->b_arc_access = ddi_get_lbolt();
+		DTRACE_PROBE1(new_state__mru, arc_buf_hdr_t *, buf);
+		arc_change_state(arc_mru, buf, hash_lock);
+
+	} else if (buf->b_state == arc_mru) {
+		now = ddi_get_lbolt();
+
+		/*
+		 * If this buffer is here because of a prefetch, then either:
+		 * - clear the flag if this is a "referencing" read
+		 *   (any subsequent access will bump this into the MFU state).
+		 * or
+		 * - move the buffer to the head of the list if this is
+		 *   another prefetch (to make it less likely to be evicted).
+		 */
+		if ((buf->b_flags & ARC_PREFETCH) != 0) {
+			if (refcount_count(&buf->b_refcnt) == 0) {
+				ASSERT(list_link_active(&buf->b_arc_node));
+			} else {
+				buf->b_flags &= ~ARC_PREFETCH;
+				ARCSTAT_BUMP(arcstat_mru_hits);
+			}
+			buf->b_arc_access = now;
+			return;
+		}
+
+		/*
+		 * This buffer has been "accessed" only once so far,
+		 * but it is still in the cache. Move it to the MFU
+		 * state.
+		 */
+		if (now > buf->b_arc_access + ARC_MINTIME) {
+			/*
+			 * More than 125ms have passed since we
+			 * instantiated this buffer.  Move it to the
+			 * most frequently used state.
+			 */
+			buf->b_arc_access = now;
+			DTRACE_PROBE1(new_state__mfu, arc_buf_hdr_t *, buf);
+			arc_change_state(arc_mfu, buf, hash_lock);
+		}
+		ARCSTAT_BUMP(arcstat_mru_hits);
+	} else if (buf->b_state == arc_mru_ghost) {
+		arc_state_t	*new_state;
+		/*
+		 * This buffer has been "accessed" recently, but
+		 * was evicted from the cache.  Move it to the
+		 * MFU state.
+		 */
+
+		if (buf->b_flags & ARC_PREFETCH) {
+			new_state = arc_mru;
+			if (refcount_count(&buf->b_refcnt) > 0)
+				buf->b_flags &= ~ARC_PREFETCH;
+			DTRACE_PROBE1(new_state__mru, arc_buf_hdr_t *, buf);
+		} else {
+			new_state = arc_mfu;
+			DTRACE_PROBE1(new_state__mfu, arc_buf_hdr_t *, buf);
+		}
+
+		buf->b_arc_access = ddi_get_lbolt();
+		arc_change_state(new_state, buf, hash_lock);
+
+		ARCSTAT_BUMP(arcstat_mru_ghost_hits);
+	} else if (buf->b_state == arc_mfu) {
+		/*
+		 * This buffer has been accessed more than once and is
+		 * still in the cache.  Keep it in the MFU state.
+		 *
+		 * NOTE: an add_reference() that occurred when we did
+		 * the arc_read() will have kicked this off the list.
+		 * If it was a prefetch, we will explicitly move it to
+		 * the head of the list now.
+		 */
+		if ((buf->b_flags & ARC_PREFETCH) != 0) {
+			ASSERT(refcount_count(&buf->b_refcnt) == 0);
+			ASSERT(list_link_active(&buf->b_arc_node));
+		}
+		ARCSTAT_BUMP(arcstat_mfu_hits);
+		buf->b_arc_access = ddi_get_lbolt();
+	} else if (buf->b_state == arc_mfu_ghost) {
+		arc_state_t	*new_state = arc_mfu;
+		/*
+		 * This buffer has been accessed more than once but has
+		 * been evicted from the cache.  Move it back to the
+		 * MFU state.
+		 */
+
+		if (buf->b_flags & ARC_PREFETCH) {
+			/*
+			 * This is a prefetch access...
+			 * move this block back to the MRU state.
+			 */
+			ASSERT3U(refcount_count(&buf->b_refcnt), ==, 0);
+			new_state = arc_mru;
+		}
+
+		buf->b_arc_access = ddi_get_lbolt();
+		DTRACE_PROBE1(new_state__mfu, arc_buf_hdr_t *, buf);
+		arc_change_state(new_state, buf, hash_lock);
+
+		ARCSTAT_BUMP(arcstat_mfu_ghost_hits);
+	} else if (buf->b_state == arc_l2c_only) {
+		/*
+		 * This buffer is on the 2nd Level ARC.
+		 */
+
+		buf->b_arc_access = ddi_get_lbolt();
+		DTRACE_PROBE1(new_state__mfu, arc_buf_hdr_t *, buf);
+		arc_change_state(arc_mfu, buf, hash_lock);
+	} else {
+		ASSERT(!"invalid arc state");
+	}
+}
+
+/* a generic arc_done_func_t which you can use */
+/* ARGSUSED */
+void
+arc_bcopy_func(zio_t *zio, arc_buf_t *buf, void *arg)
+{
+	if (zio == NULL || zio->io_error == 0)
+		bcopy(buf->b_data, arg, buf->b_hdr->b_size);
+	VERIFY(arc_buf_remove_ref(buf, arg) == 1);
+}
+
+/* a generic arc_done_func_t */
+void
+arc_getbuf_func(zio_t *zio, arc_buf_t *buf, void *arg)
+{
+	arc_buf_t **bufp = arg;
+	if (zio && zio->io_error) {
+		VERIFY(arc_buf_remove_ref(buf, arg) == 1);
+		*bufp = NULL;
+	} else {
+		*bufp = buf;
+		ASSERT(buf->b_data);
+	}
+}
+
+static void
+arc_read_done(zio_t *zio)
+{
+	arc_buf_hdr_t	*hdr, *found;
+	arc_buf_t	*buf;
+	arc_buf_t	*abuf;	/* buffer we're assigning to callback */
+	kmutex_t	*hash_lock;
+	arc_callback_t	*callback_list, *acb;
+	int		freeable = FALSE;
+
+	buf = zio->io_private;
+	hdr = buf->b_hdr;
+
+	/*
+	 * The hdr was inserted into hash-table and removed from lists
+	 * prior to starting I/O.  We should find this header, since
+	 * it's in the hash table, and it should be legit since it's
+	 * not possible to evict it during the I/O.  The only possible
+	 * reason for it not to be found is if we were freed during the
+	 * read.
+	 */
+	found = buf_hash_find(hdr->b_spa, &hdr->b_dva, hdr->b_birth,
+	    &hash_lock);
+
+	ASSERT((found == NULL && HDR_FREED_IN_READ(hdr) && hash_lock == NULL) ||
+	    (found == hdr && DVA_EQUAL(&hdr->b_dva, BP_IDENTITY(zio->io_bp))) ||
+	    (found == hdr && HDR_L2_READING(hdr)));
+
+	hdr->b_flags &= ~ARC_L2_EVICTED;
+	if (l2arc_noprefetch && (hdr->b_flags & ARC_PREFETCH))
+		hdr->b_flags &= ~ARC_L2CACHE;
+
+	/* byteswap if necessary */
+	callback_list = hdr->b_acb;
+	ASSERT(callback_list != NULL);
+	if (BP_SHOULD_BYTESWAP(zio->io_bp) && zio->io_error == 0) {
+		arc_byteswap_func_t *func = BP_GET_LEVEL(zio->io_bp) > 0 ?
+		    byteswap_uint64_array :
+		    dmu_ot[BP_GET_TYPE(zio->io_bp)].ot_byteswap;
+		func(buf->b_data, hdr->b_size);
+	}
+
+	arc_cksum_compute(buf, B_FALSE);
+
+	if (hash_lock && zio->io_error == 0 && hdr->b_state == arc_anon) {
+		/*
+		 * Only call arc_access on anonymous buffers.  This is because
+		 * if we've issued an I/O for an evicted buffer, we've already
+		 * called arc_access (to prevent any simultaneous readers from
+		 * getting confused).
+		 */
+		arc_access(hdr, hash_lock);
+	}
+
+	/* create copies of the data buffer for the callers */
+	abuf = buf;
+	for (acb = callback_list; acb; acb = acb->acb_next) {
+		if (acb->acb_done) {
+			if (abuf == NULL)
+				abuf = arc_buf_clone(buf);
+			acb->acb_buf = abuf;
+			abuf = NULL;
+		}
+	}
+	hdr->b_acb = NULL;
+	hdr->b_flags &= ~ARC_IO_IN_PROGRESS;
+	ASSERT(!HDR_BUF_AVAILABLE(hdr));
+	if (abuf == buf) {
+		ASSERT(buf->b_efunc == NULL);
+		ASSERT(hdr->b_datacnt == 1);
+		hdr->b_flags |= ARC_BUF_AVAILABLE;
+	}
+
+	ASSERT(refcount_is_zero(&hdr->b_refcnt) || callback_list != NULL);
+
+	if (zio->io_error != 0) {
+		hdr->b_flags |= ARC_IO_ERROR;
+		if (hdr->b_state != arc_anon)
+			arc_change_state(arc_anon, hdr, hash_lock);
+		if (HDR_IN_HASH_TABLE(hdr))
+			buf_hash_remove(hdr);
+		freeable = refcount_is_zero(&hdr->b_refcnt);
+	}
+
+	/*
+	 * Broadcast before we drop the hash_lock to avoid the possibility
+	 * that the hdr (and hence the cv) might be freed before we get to
+	 * the cv_broadcast().
+	 */
+	cv_broadcast(&hdr->b_cv);
+
+	if (hash_lock) {
+		mutex_exit(hash_lock);
+	} else {
+		/*
+		 * This block was freed while we waited for the read to
+		 * complete.  It has been removed from the hash table and
+		 * moved to the anonymous state (so that it won't show up
+		 * in the cache).
+		 */
+		ASSERT3P(hdr->b_state, ==, arc_anon);
+		freeable = refcount_is_zero(&hdr->b_refcnt);
+	}
+
+	/* execute each callback and free its structure */
+	while ((acb = callback_list) != NULL) {
+		if (acb->acb_done)
+			acb->acb_done(zio, acb->acb_buf, acb->acb_private);
+
+		if (acb->acb_zio_dummy != NULL) {
+			acb->acb_zio_dummy->io_error = zio->io_error;
+			zio_nowait(acb->acb_zio_dummy);
+		}
+
+		callback_list = acb->acb_next;
+		kmem_free(acb, sizeof (arc_callback_t));
+	}
+
+	if (freeable)
+		arc_hdr_destroy(hdr);
+}
+
+/*
+ * "Read" the block block at the specified DVA (in bp) via the
+ * cache.  If the block is found in the cache, invoke the provided
+ * callback immediately and return.  Note that the `zio' parameter
+ * in the callback will be NULL in this case, since no IO was
+ * required.  If the block is not in the cache pass the read request
+ * on to the spa with a substitute callback function, so that the
+ * requested block will be added to the cache.
+ *
+ * If a read request arrives for a block that has a read in-progress,
+ * either wait for the in-progress read to complete (and return the
+ * results); or, if this is a read with a "done" func, add a record
+ * to the read to invoke the "done" func when the read completes,
+ * and return; or just return.
+ *
+ * arc_read_done() will invoke all the requested "done" functions
+ * for readers of this block.
+ *
+ * Normal callers should use arc_read and pass the arc buffer and offset
+ * for the bp.  But if you know you don't need locking, you can use
+ * arc_read_bp.
+ */
+int
+arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, arc_buf_t *pbuf,
+    arc_done_func_t *done, void *private, int priority, int zio_flags,
+    uint32_t *arc_flags, const zbookmark_t *zb)
+{
+	int err;
+
+	if (pbuf == NULL) {
+		/*
+		 * XXX This happens from traverse callback funcs, for
+		 * the objset_phys_t block.
+		 */
+		return (arc_read_nolock(pio, spa, bp, done, private, priority,
+		    zio_flags, arc_flags, zb));
+	}
+
+	ASSERT(!refcount_is_zero(&pbuf->b_hdr->b_refcnt));
+	ASSERT3U((char *)bp - (char *)pbuf->b_data, <, pbuf->b_hdr->b_size);
+	rw_enter(&pbuf->b_data_lock, RW_READER);
+
+	err = arc_read_nolock(pio, spa, bp, done, private, priority,
+	    zio_flags, arc_flags, zb);
+	rw_exit(&pbuf->b_data_lock);
+
+	return (err);
+}
+
+int
+arc_read_nolock(zio_t *pio, spa_t *spa, const blkptr_t *bp,
+    arc_done_func_t *done, void *private, int priority, int zio_flags,
+    uint32_t *arc_flags, const zbookmark_t *zb)
+{
+	arc_buf_hdr_t *hdr;
+	arc_buf_t *buf;
+	kmutex_t *hash_lock;
+	zio_t *rzio;
+	uint64_t guid = spa_guid(spa);
+
+top:
+	hdr = buf_hash_find(guid, BP_IDENTITY(bp), BP_PHYSICAL_BIRTH(bp),
+	    &hash_lock);
+	if (hdr && hdr->b_datacnt > 0) {
+
+		*arc_flags |= ARC_CACHED;
+
+		if (HDR_IO_IN_PROGRESS(hdr)) {
+
+			if (*arc_flags & ARC_WAIT) {
+				cv_wait(&hdr->b_cv, hash_lock);
+				mutex_exit(hash_lock);
+				goto top;
+			}
+			ASSERT(*arc_flags & ARC_NOWAIT);
+
+			if (done) {
+				arc_callback_t	*acb = NULL;
+
+				acb = kmem_zalloc(sizeof (arc_callback_t),
+				    KM_SLEEP);
+				acb->acb_done = done;
+				acb->acb_private = private;
+				if (pio != NULL)
+					acb->acb_zio_dummy = zio_null(pio,
+					    spa, NULL, NULL, NULL, zio_flags);
+
+				ASSERT(acb->acb_done != NULL);
+				acb->acb_next = hdr->b_acb;
+				hdr->b_acb = acb;
+				add_reference(hdr, hash_lock, private);
+				mutex_exit(hash_lock);
+				return (0);
+			}
+			mutex_exit(hash_lock);
+			return (0);
+		}
+
+		ASSERT(hdr->b_state == arc_mru || hdr->b_state == arc_mfu);
+
+		if (done) {
+			add_reference(hdr, hash_lock, private);
+			/*
+			 * If this block is already in use, create a new
+			 * copy of the data so that we will be guaranteed
+			 * that arc_release() will always succeed.
+			 */
+			buf = hdr->b_buf;
+			ASSERT(buf);
+			ASSERT(buf->b_data);
+			if (HDR_BUF_AVAILABLE(hdr)) {
+				ASSERT(buf->b_efunc == NULL);
+				hdr->b_flags &= ~ARC_BUF_AVAILABLE;
+			} else {
+				buf = arc_buf_clone(buf);
+			}
+
+		} else if (*arc_flags & ARC_PREFETCH &&
+		    refcount_count(&hdr->b_refcnt) == 0) {
+			hdr->b_flags |= ARC_PREFETCH;
+		}
+		DTRACE_PROBE1(arc__hit, arc_buf_hdr_t *, hdr);
+		arc_access(hdr, hash_lock);
+		if (*arc_flags & ARC_L2CACHE)
+			hdr->b_flags |= ARC_L2CACHE;
+		mutex_exit(hash_lock);
+		ARCSTAT_BUMP(arcstat_hits);
+		ARCSTAT_CONDSTAT(!(hdr->b_flags & ARC_PREFETCH),
+		    demand, prefetch, hdr->b_type != ARC_BUFC_METADATA,
+		    data, metadata, hits);
+
+		if (done)
+			done(NULL, buf, private);
+	} else {
+		uint64_t size = BP_GET_LSIZE(bp);
+		arc_callback_t	*acb;
+		vdev_t *vd = NULL;
+		uint64_t addr;
+		boolean_t devw = B_FALSE;
+
+		if (hdr == NULL) {
+			/* this block is not in the cache */
+			arc_buf_hdr_t	*exists;
+			arc_buf_contents_t type = BP_GET_BUFC_TYPE(bp);
+			buf = arc_buf_alloc(spa, size, private, type);
+			hdr = buf->b_hdr;
+			hdr->b_dva = *BP_IDENTITY(bp);
+			hdr->b_birth = BP_PHYSICAL_BIRTH(bp);
+			hdr->b_cksum0 = bp->blk_cksum.zc_word[0];
+			exists = buf_hash_insert(hdr, &hash_lock);
+			if (exists) {
+				/* somebody beat us to the hash insert */
+				mutex_exit(hash_lock);
+				buf_discard_identity(hdr);
+				(void) arc_buf_remove_ref(buf, private);
+				goto top; /* restart the IO request */
+			}
+			/* if this is a prefetch, we don't have a reference */
+			if (*arc_flags & ARC_PREFETCH) {
+				(void) remove_reference(hdr, hash_lock,
+				    private);
+				hdr->b_flags |= ARC_PREFETCH;
+			}
+			if (*arc_flags & ARC_L2CACHE)
+				hdr->b_flags |= ARC_L2CACHE;
+			if (BP_GET_LEVEL(bp) > 0)
+				hdr->b_flags |= ARC_INDIRECT;
+		} else {
+			/* this block is in the ghost cache */
+			ASSERT(GHOST_STATE(hdr->b_state));
+			ASSERT(!HDR_IO_IN_PROGRESS(hdr));
+			ASSERT3U(refcount_count(&hdr->b_refcnt), ==, 0);
+			ASSERT(hdr->b_buf == NULL);
+
+			/* if this is a prefetch, we don't have a reference */
+			if (*arc_flags & ARC_PREFETCH)
+				hdr->b_flags |= ARC_PREFETCH;
+			else
+				add_reference(hdr, hash_lock, private);
+			if (*arc_flags & ARC_L2CACHE)
+				hdr->b_flags |= ARC_L2CACHE;
+			buf = kmem_cache_alloc(buf_cache, KM_PUSHPAGE);
+			buf->b_hdr = hdr;
+			buf->b_data = NULL;
+			buf->b_efunc = NULL;
+			buf->b_private = NULL;
+			buf->b_next = NULL;
+			hdr->b_buf = buf;
+			ASSERT(hdr->b_datacnt == 0);
+			hdr->b_datacnt = 1;
+			arc_get_data_buf(buf);
+			arc_access(hdr, hash_lock);
+		}
+
+		ASSERT(!GHOST_STATE(hdr->b_state));
+
+		acb = kmem_zalloc(sizeof (arc_callback_t), KM_SLEEP);
+		acb->acb_done = done;
+		acb->acb_private = private;
+
+		ASSERT(hdr->b_acb == NULL);
+		hdr->b_acb = acb;
+		hdr->b_flags |= ARC_IO_IN_PROGRESS;
+
+		if (HDR_L2CACHE(hdr) && hdr->b_l2hdr != NULL &&
+		    (vd = hdr->b_l2hdr->b_dev->l2ad_vdev) != NULL) {
+			devw = hdr->b_l2hdr->b_dev->l2ad_writing;
+			addr = hdr->b_l2hdr->b_daddr;
+			/*
+			 * Lock out device removal.
+			 */
+			if (vdev_is_dead(vd) ||
+			    !spa_config_tryenter(spa, SCL_L2ARC, vd, RW_READER))
+				vd = NULL;
+		}
+
+		mutex_exit(hash_lock);
+
+		ASSERT3U(hdr->b_size, ==, size);
+		DTRACE_PROBE4(arc__miss, arc_buf_hdr_t *, hdr, blkptr_t *, bp,
+		    uint64_t, size, zbookmark_t *, zb);
+		ARCSTAT_BUMP(arcstat_misses);
+		ARCSTAT_CONDSTAT(!(hdr->b_flags & ARC_PREFETCH),
+		    demand, prefetch, hdr->b_type != ARC_BUFC_METADATA,
+		    data, metadata, misses);
+
+		if (vd != NULL && l2arc_ndev != 0 && !(l2arc_norw && devw)) {
+			/*
+			 * Read from the L2ARC if the following are true:
+			 * 1. The L2ARC vdev was previously cached.
+			 * 2. This buffer still has L2ARC metadata.
+			 * 3. This buffer isn't currently writing to the L2ARC.
+			 * 4. The L2ARC entry wasn't evicted, which may
+			 *    also have invalidated the vdev.
+			 * 5. This isn't prefetch and l2arc_noprefetch is set.
+			 */
+			if (hdr->b_l2hdr != NULL &&
+			    !HDR_L2_WRITING(hdr) && !HDR_L2_EVICTED(hdr) &&
+			    !(l2arc_noprefetch && HDR_PREFETCH(hdr))) {
+				l2arc_read_callback_t *cb;
+
+				DTRACE_PROBE1(l2arc__hit, arc_buf_hdr_t *, hdr);
+				ARCSTAT_BUMP(arcstat_l2_hits);
+
+				cb = kmem_zalloc(sizeof (l2arc_read_callback_t),
+				    KM_SLEEP);
+				cb->l2rcb_buf = buf;
+				cb->l2rcb_spa = spa;
+				cb->l2rcb_bp = *bp;
+				cb->l2rcb_zb = *zb;
+				cb->l2rcb_flags = zio_flags;
+
+				/*
+				 * l2arc read.  The SCL_L2ARC lock will be
+				 * released by l2arc_read_done().
+				 */
+				rzio = zio_read_phys(pio, vd, addr, size,
+				    buf->b_data, ZIO_CHECKSUM_OFF,
+				    l2arc_read_done, cb, priority, zio_flags |
+				    ZIO_FLAG_DONT_CACHE | ZIO_FLAG_CANFAIL |
+				    ZIO_FLAG_DONT_PROPAGATE |
+				    ZIO_FLAG_DONT_RETRY, B_FALSE);
+				DTRACE_PROBE2(l2arc__read, vdev_t *, vd,
+				    zio_t *, rzio);
+				ARCSTAT_INCR(arcstat_l2_read_bytes, size);
+
+				if (*arc_flags & ARC_NOWAIT) {
+					zio_nowait(rzio);
+					return (0);
+				}
+
+				ASSERT(*arc_flags & ARC_WAIT);
+				if (zio_wait(rzio) == 0)
+					return (0);
+
+				/* l2arc read error; goto zio_read() */
+			} else {
+				DTRACE_PROBE1(l2arc__miss,
+				    arc_buf_hdr_t *, hdr);
+				ARCSTAT_BUMP(arcstat_l2_misses);
+				if (HDR_L2_WRITING(hdr))
+					ARCSTAT_BUMP(arcstat_l2_rw_clash);
+				spa_config_exit(spa, SCL_L2ARC, vd);
+			}
+		} else {
+			if (vd != NULL)
+				spa_config_exit(spa, SCL_L2ARC, vd);
+			if (l2arc_ndev != 0) {
+				DTRACE_PROBE1(l2arc__miss,
+				    arc_buf_hdr_t *, hdr);
+				ARCSTAT_BUMP(arcstat_l2_misses);
+			}
+		}
+
+		rzio = zio_read(pio, spa, bp, buf->b_data, size,
+		    arc_read_done, buf, priority, zio_flags, zb);
+
+		if (*arc_flags & ARC_WAIT)
+			return (zio_wait(rzio));
+
+		ASSERT(*arc_flags & ARC_NOWAIT);
+		zio_nowait(rzio);
+	}
+	return (0);
+}
+
+void
+arc_set_callback(arc_buf_t *buf, arc_evict_func_t *func, void *private)
+{
+	ASSERT(buf->b_hdr != NULL);
+	ASSERT(buf->b_hdr->b_state != arc_anon);
+	ASSERT(!refcount_is_zero(&buf->b_hdr->b_refcnt) || func == NULL);
+	ASSERT(buf->b_efunc == NULL);
+	ASSERT(!HDR_BUF_AVAILABLE(buf->b_hdr));
+
+	buf->b_efunc = func;
+	buf->b_private = private;
+}
+
+/*
+ * This is used by the DMU to let the ARC know that a buffer is
+ * being evicted, so the ARC should clean up.  If this arc buf
+ * is not yet in the evicted state, it will be put there.
+ */
+int
+arc_buf_evict(arc_buf_t *buf)
+{
+	arc_buf_hdr_t *hdr;
+	kmutex_t *hash_lock;
+	arc_buf_t **bufp;
+
+	mutex_enter(&buf->b_evict_lock);
+	hdr = buf->b_hdr;
+	if (hdr == NULL) {
+		/*
+		 * We are in arc_do_user_evicts().
+		 */
+		ASSERT(buf->b_data == NULL);
+		mutex_exit(&buf->b_evict_lock);
+		return (0);
+	} else if (buf->b_data == NULL) {
+		arc_buf_t copy = *buf; /* structure assignment */
+		/*
+		 * We are on the eviction list; process this buffer now
+		 * but let arc_do_user_evicts() do the reaping.
+		 */
+		buf->b_efunc = NULL;
+		mutex_exit(&buf->b_evict_lock);
+		VERIFY(copy.b_efunc(&copy) == 0);
+		return (1);
+	}
+	hash_lock = HDR_LOCK(hdr);
+	mutex_enter(hash_lock);
+	hdr = buf->b_hdr;
+	ASSERT3P(hash_lock, ==, HDR_LOCK(hdr));
+
+	ASSERT3U(refcount_count(&hdr->b_refcnt), <, hdr->b_datacnt);
+	ASSERT(hdr->b_state == arc_mru || hdr->b_state == arc_mfu);
+
+	/*
+	 * Pull this buffer off of the hdr
+	 */
+	bufp = &hdr->b_buf;
+	while (*bufp != buf)
+		bufp = &(*bufp)->b_next;
+	*bufp = buf->b_next;
+
+	ASSERT(buf->b_data != NULL);
+	arc_buf_destroy(buf, FALSE, FALSE);
+
+	if (hdr->b_datacnt == 0) {
+		arc_state_t *old_state = hdr->b_state;
+		arc_state_t *evicted_state;
+
+		ASSERT(hdr->b_buf == NULL);
+		ASSERT(refcount_is_zero(&hdr->b_refcnt));
+
+		evicted_state =
+		    (old_state == arc_mru) ? arc_mru_ghost : arc_mfu_ghost;
+
+		mutex_enter(&old_state->arcs_mtx);
+		mutex_enter(&evicted_state->arcs_mtx);
+
+		arc_change_state(evicted_state, hdr, hash_lock);
+		ASSERT(HDR_IN_HASH_TABLE(hdr));
+		hdr->b_flags |= ARC_IN_HASH_TABLE;
+		hdr->b_flags &= ~ARC_BUF_AVAILABLE;
+
+		mutex_exit(&evicted_state->arcs_mtx);
+		mutex_exit(&old_state->arcs_mtx);
+	}
+	mutex_exit(hash_lock);
+	mutex_exit(&buf->b_evict_lock);
+
+	VERIFY(buf->b_efunc(buf) == 0);
+	buf->b_efunc = NULL;
+	buf->b_private = NULL;
+	buf->b_hdr = NULL;
+	buf->b_next = NULL;
+	kmem_cache_free(buf_cache, buf);
+	return (1);
+}
+
+/*
+ * Release this buffer from the cache.  This must be done
+ * after a read and prior to modifying the buffer contents.
+ * If the buffer has more than one reference, we must make
+ * a new hdr for the buffer.
+ */
+void
+arc_release(arc_buf_t *buf, void *tag)
+{
+	arc_buf_hdr_t *hdr;
+	kmutex_t *hash_lock = NULL;
+	l2arc_buf_hdr_t *l2hdr;
+	uint64_t buf_size;
+
+	/*
+	 * It would be nice to assert that if it's DMU metadata (level >
+	 * 0 || it's the dnode file), then it must be syncing context.
+	 * But we don't know that information at this level.
+	 */
+
+	mutex_enter(&buf->b_evict_lock);
+	hdr = buf->b_hdr;
+
+	/* this buffer is not on any list */
+	ASSERT(refcount_count(&hdr->b_refcnt) > 0);
+
+	if (hdr->b_state == arc_anon) {
+		/* this buffer is already released */
+		ASSERT(buf->b_efunc == NULL);
+	} else {
+		hash_lock = HDR_LOCK(hdr);
+		mutex_enter(hash_lock);
+		hdr = buf->b_hdr;
+		ASSERT3P(hash_lock, ==, HDR_LOCK(hdr));
+	}
+
+	l2hdr = hdr->b_l2hdr;
+	if (l2hdr) {
+		mutex_enter(&l2arc_buflist_mtx);
+		hdr->b_l2hdr = NULL;
+		buf_size = hdr->b_size;
+	}
+
+	/*
+	 * Do we have more than one buf?
+	 */
+	if (hdr->b_datacnt > 1) {
+		arc_buf_hdr_t *nhdr;
+		arc_buf_t **bufp;
+		uint64_t blksz = hdr->b_size;
+		uint64_t spa = hdr->b_spa;
+		arc_buf_contents_t type = hdr->b_type;
+		uint32_t flags = hdr->b_flags;
+
+		ASSERT(hdr->b_buf != buf || buf->b_next != NULL);
+		/*
+		 * Pull the data off of this hdr and attach it to
+		 * a new anonymous hdr.
+		 */
+		(void) remove_reference(hdr, hash_lock, tag);
+		bufp = &hdr->b_buf;
+		while (*bufp != buf)
+			bufp = &(*bufp)->b_next;
+		*bufp = buf->b_next;
+		buf->b_next = NULL;
+
+		ASSERT3U(hdr->b_state->arcs_size, >=, hdr->b_size);
+		atomic_add_64(&hdr->b_state->arcs_size, -hdr->b_size);
+		if (refcount_is_zero(&hdr->b_refcnt)) {
+			uint64_t *size = &hdr->b_state->arcs_lsize[hdr->b_type];
+			ASSERT3U(*size, >=, hdr->b_size);
+			atomic_add_64(size, -hdr->b_size);
+		}
+		hdr->b_datacnt -= 1;
+		arc_cksum_verify(buf);
+
+		mutex_exit(hash_lock);
+
+		nhdr = kmem_cache_alloc(hdr_cache, KM_PUSHPAGE);
+		nhdr->b_size = blksz;
+		nhdr->b_spa = spa;
+		nhdr->b_type = type;
+		nhdr->b_buf = buf;
+		nhdr->b_state = arc_anon;
+		nhdr->b_arc_access = 0;
+		nhdr->b_flags = flags & ARC_L2_WRITING;
+		nhdr->b_l2hdr = NULL;
+		nhdr->b_datacnt = 1;
+		nhdr->b_freeze_cksum = NULL;
+		(void) refcount_add(&nhdr->b_refcnt, tag);
+		buf->b_hdr = nhdr;
+		mutex_exit(&buf->b_evict_lock);
+		atomic_add_64(&arc_anon->arcs_size, blksz);
+	} else {
+		mutex_exit(&buf->b_evict_lock);
+		ASSERT(refcount_count(&hdr->b_refcnt) == 1);
+		ASSERT(!list_link_active(&hdr->b_arc_node));
+		ASSERT(!HDR_IO_IN_PROGRESS(hdr));
+		if (hdr->b_state != arc_anon)
+			arc_change_state(arc_anon, hdr, hash_lock);
+		hdr->b_arc_access = 0;
+		if (hash_lock)
+			mutex_exit(hash_lock);
+
+		buf_discard_identity(hdr);
+		arc_buf_thaw(buf);
+	}
+	buf->b_efunc = NULL;
+	buf->b_private = NULL;
+
+	if (l2hdr) {
+		list_remove(l2hdr->b_dev->l2ad_buflist, hdr);
+		kmem_free(l2hdr, sizeof (l2arc_buf_hdr_t));
+		ARCSTAT_INCR(arcstat_l2_size, -buf_size);
+		mutex_exit(&l2arc_buflist_mtx);
+	}
+}
+
+/*
+ * Release this buffer.  If it does not match the provided BP, fill it
+ * with that block's contents.
+ */
+/* ARGSUSED */
+int
+arc_release_bp(arc_buf_t *buf, void *tag, blkptr_t *bp, spa_t *spa,
+    zbookmark_t *zb)
+{
+	arc_release(buf, tag);
+	return (0);
+}
+
+int
+arc_released(arc_buf_t *buf)
+{
+	int released;
+
+	mutex_enter(&buf->b_evict_lock);
+	released = (buf->b_data != NULL && buf->b_hdr->b_state == arc_anon);
+	mutex_exit(&buf->b_evict_lock);
+	return (released);
+}
+
+int
+arc_has_callback(arc_buf_t *buf)
+{
+	int callback;
+
+	mutex_enter(&buf->b_evict_lock);
+	callback = (buf->b_efunc != NULL);
+	mutex_exit(&buf->b_evict_lock);
+	return (callback);
+}
+
+#ifdef ZFS_DEBUG
+int
+arc_referenced(arc_buf_t *buf)
+{
+	int referenced;
+
+	mutex_enter(&buf->b_evict_lock);
+	referenced = (refcount_count(&buf->b_hdr->b_refcnt));
+	mutex_exit(&buf->b_evict_lock);
+	return (referenced);
+}
+#endif
+
+static void
+arc_write_ready(zio_t *zio)
+{
+	arc_write_callback_t *callback = zio->io_private;
+	arc_buf_t *buf = callback->awcb_buf;
+	arc_buf_hdr_t *hdr = buf->b_hdr;
+
+	ASSERT(!refcount_is_zero(&buf->b_hdr->b_refcnt));
+	callback->awcb_ready(zio, buf, callback->awcb_private);
+
+	/*
+	 * If the IO is already in progress, then this is a re-write
+	 * attempt, so we need to thaw and re-compute the cksum.
+	 * It is the responsibility of the callback to handle the
+	 * accounting for any re-write attempt.
+	 */
+	if (HDR_IO_IN_PROGRESS(hdr)) {
+		mutex_enter(&hdr->b_freeze_lock);
+		if (hdr->b_freeze_cksum != NULL) {
+			kmem_free(hdr->b_freeze_cksum, sizeof (zio_cksum_t));
+			hdr->b_freeze_cksum = NULL;
+		}
+		mutex_exit(&hdr->b_freeze_lock);
+	}
+	arc_cksum_compute(buf, B_FALSE);
+	hdr->b_flags |= ARC_IO_IN_PROGRESS;
+}
+
+static void
+arc_write_done(zio_t *zio)
+{
+	arc_write_callback_t *callback = zio->io_private;
+	arc_buf_t *buf = callback->awcb_buf;
+	arc_buf_hdr_t *hdr = buf->b_hdr;
+
+	ASSERT(hdr->b_acb == NULL);
+
+	if (zio->io_error == 0) {
+		hdr->b_dva = *BP_IDENTITY(zio->io_bp);
+		hdr->b_birth = BP_PHYSICAL_BIRTH(zio->io_bp);
+		hdr->b_cksum0 = zio->io_bp->blk_cksum.zc_word[0];
+	} else {
+		ASSERT(BUF_EMPTY(hdr));
+	}
+
+	/*
+	 * If the block to be written was all-zero, we may have
+	 * compressed it away.  In this case no write was performed
+	 * so there will be no dva/birth/checksum.  The buffer must
+	 * therefore remain anonymous (and uncached).
+	 */
+	if (!BUF_EMPTY(hdr)) {
+		arc_buf_hdr_t *exists;
+		kmutex_t *hash_lock;
+
+		ASSERT(zio->io_error == 0);
+
+		arc_cksum_verify(buf);
+
+		exists = buf_hash_insert(hdr, &hash_lock);
+		if (exists) {
+			/*
+			 * This can only happen if we overwrite for
+			 * sync-to-convergence, because we remove
+			 * buffers from the hash table when we arc_free().
+			 */
+			if (zio->io_flags & ZIO_FLAG_IO_REWRITE) {
+				if (!BP_EQUAL(&zio->io_bp_orig, zio->io_bp))
+					panic("bad overwrite, hdr=%p exists=%p",
+					    (void *)hdr, (void *)exists);
+				ASSERT(refcount_is_zero(&exists->b_refcnt));
+				arc_change_state(arc_anon, exists, hash_lock);
+				mutex_exit(hash_lock);
+				arc_hdr_destroy(exists);
+				exists = buf_hash_insert(hdr, &hash_lock);
+				ASSERT3P(exists, ==, NULL);
+			} else {
+				/* Dedup */
+				ASSERT(hdr->b_datacnt == 1);
+				ASSERT(hdr->b_state == arc_anon);
+				ASSERT(BP_GET_DEDUP(zio->io_bp));
+				ASSERT(BP_GET_LEVEL(zio->io_bp) == 0);
+			}
+		}
+		hdr->b_flags &= ~ARC_IO_IN_PROGRESS;
+		/* if it's not anon, we are doing a scrub */
+		if (!exists && hdr->b_state == arc_anon)
+			arc_access(hdr, hash_lock);
+		mutex_exit(hash_lock);
+	} else {
+		hdr->b_flags &= ~ARC_IO_IN_PROGRESS;
+	}
+
+	ASSERT(!refcount_is_zero(&hdr->b_refcnt));
+	callback->awcb_done(zio, buf, callback->awcb_private);
+
+	kmem_free(callback, sizeof (arc_write_callback_t));
+}
+
+zio_t *
+arc_write(zio_t *pio, spa_t *spa, uint64_t txg,
+    blkptr_t *bp, arc_buf_t *buf, boolean_t l2arc, const zio_prop_t *zp,
+    arc_done_func_t *ready, arc_done_func_t *done, void *private,
+    int priority, int zio_flags, const zbookmark_t *zb)
+{
+	arc_buf_hdr_t *hdr = buf->b_hdr;
+	arc_write_callback_t *callback;
+	zio_t *zio;
+
+	ASSERT(ready != NULL);
+	ASSERT(done != NULL);
+	ASSERT(!HDR_IO_ERROR(hdr));
+	ASSERT((hdr->b_flags & ARC_IO_IN_PROGRESS) == 0);
+	ASSERT(hdr->b_acb == NULL);
+	if (l2arc)
+		hdr->b_flags |= ARC_L2CACHE;
+	callback = kmem_zalloc(sizeof (arc_write_callback_t), KM_SLEEP);
+	callback->awcb_ready = ready;
+	callback->awcb_done = done;
+	callback->awcb_private = private;
+	callback->awcb_buf = buf;
+
+	zio = zio_write(pio, spa, txg, bp, buf->b_data, hdr->b_size, zp,
+	    arc_write_ready, arc_write_done, callback, priority, zio_flags, zb);
+
+	return (zio);
+}
+
+static int
+arc_memory_throttle(uint64_t reserve, uint64_t inflight_data, uint64_t txg)
+{
+#ifdef _KERNEL
+	uint64_t available_memory = ptob(freemem);
+	static uint64_t page_load = 0;
+	static uint64_t last_txg = 0;
+
+#if defined(__i386)
+	available_memory =
+	    MIN(available_memory, vmem_size(heap_arena, VMEM_FREE));
+#endif
+	if (available_memory >= zfs_write_limit_max)
+		return (0);
+
+	if (txg > last_txg) {
+		last_txg = txg;
+		page_load = 0;
+	}
+	/*
+	 * If we are in pageout, we know that memory is already tight,
+	 * the arc is already going to be evicting, so we just want to
+	 * continue to let page writes occur as quickly as possible.
+	 */
+	if (curproc == proc_pageout) {
+		if (page_load > MAX(ptob(minfree), available_memory) / 4)
+			return (ERESTART);
+		/* Note: reserve is inflated, so we deflate */
+		page_load += reserve / 8;
+		return (0);
+	} else if (page_load > 0 && arc_reclaim_needed()) {
+		/* memory is low, delay before restarting */
+		ARCSTAT_INCR(arcstat_memory_throttle_count, 1);
+		return (EAGAIN);
+	}
+	page_load = 0;
+
+	if (arc_size > arc_c_min) {
+		uint64_t evictable_memory =
+		    arc_mru->arcs_lsize[ARC_BUFC_DATA] +
+		    arc_mru->arcs_lsize[ARC_BUFC_METADATA] +
+		    arc_mfu->arcs_lsize[ARC_BUFC_DATA] +
+		    arc_mfu->arcs_lsize[ARC_BUFC_METADATA];
+		available_memory += MIN(evictable_memory, arc_size - arc_c_min);
+	}
+
+	if (inflight_data > available_memory / 4) {
+		ARCSTAT_INCR(arcstat_memory_throttle_count, 1);
+		return (ERESTART);
+	}
+#endif
+	return (0);
+}
+
+void
+arc_tempreserve_clear(uint64_t reserve)
+{
+	atomic_add_64(&arc_tempreserve, -reserve);
+	ASSERT((int64_t)arc_tempreserve >= 0);
+}
+
+int
+arc_tempreserve_space(uint64_t reserve, uint64_t txg)
+{
+	int error;
+	uint64_t anon_size;
+
+#ifdef ZFS_DEBUG
+	/*
+	 * Once in a while, fail for no reason.  Everything should cope.
+	 */
+	if (spa_get_random(10000) == 0) {
+		dprintf("forcing random failure\n");
+		return (ERESTART);
+	}
+#endif
+	if (reserve > arc_c/4 && !arc_no_grow)
+		arc_c = MIN(arc_c_max, reserve * 4);
+	if (reserve > arc_c)
+		return (ENOMEM);
+
+	/*
+	 * Don't count loaned bufs as in flight dirty data to prevent long
+	 * network delays from blocking transactions that are ready to be
+	 * assigned to a txg.
+	 */
+	anon_size = MAX((int64_t)(arc_anon->arcs_size - arc_loaned_bytes), 0);
+
+	/*
+	 * Writes will, almost always, require additional memory allocations
+	 * in order to compress/encrypt/etc the data.  We therefor need to
+	 * make sure that there is sufficient available memory for this.
+	 */
+	if (error = arc_memory_throttle(reserve, anon_size, txg))
+		return (error);
+
+	/*
+	 * Throttle writes when the amount of dirty data in the cache
+	 * gets too large.  We try to keep the cache less than half full
+	 * of dirty blocks so that our sync times don't grow too large.
+	 * Note: if two requests come in concurrently, we might let them
+	 * both succeed, when one of them should fail.  Not a huge deal.
+	 */
+
+	if (reserve + arc_tempreserve + anon_size > arc_c / 2 &&
+	    anon_size > arc_c / 4) {
+		dprintf("failing, arc_tempreserve=%lluK anon_meta=%lluK "
+		    "anon_data=%lluK tempreserve=%lluK arc_c=%lluK\n",
+		    arc_tempreserve>>10,
+		    arc_anon->arcs_lsize[ARC_BUFC_METADATA]>>10,
+		    arc_anon->arcs_lsize[ARC_BUFC_DATA]>>10,
+		    reserve>>10, arc_c>>10);
+		return (ERESTART);
+	}
+	atomic_add_64(&arc_tempreserve, reserve);
+	return (0);
+}
+
+void
+arc_init(void)
+{
+	mutex_init(&arc_reclaim_thr_lock, NULL, MUTEX_DEFAULT, NULL);
+	cv_init(&arc_reclaim_thr_cv, NULL, CV_DEFAULT, NULL);
+
+	/* Convert seconds to clock ticks */
+	arc_min_prefetch_lifespan = 1 * hz;
+
+	/* Start out with 1/8 of all memory */
+	arc_c = physmem * PAGESIZE / 8;
+
+#ifdef _KERNEL
+	/*
+	 * On architectures where the physical memory can be larger
+	 * than the addressable space (intel in 32-bit mode), we may
+	 * need to limit the cache to 1/8 of VM size.
+	 */
+	arc_c = MIN(arc_c, vmem_size(heap_arena, VMEM_ALLOC | VMEM_FREE) / 8);
+#endif
+
+	/* set min cache to 1/32 of all memory, or 64MB, whichever is more */
+	arc_c_min = MAX(arc_c / 4, 64<<20);
+	/* set max to 3/4 of all memory, or all but 1GB, whichever is more */
+	if (arc_c * 8 >= 1<<30)
+		arc_c_max = (arc_c * 8) - (1<<30);
+	else
+		arc_c_max = arc_c_min;
+	arc_c_max = MAX(arc_c * 6, arc_c_max);
+
+	/*
+	 * Allow the tunables to override our calculations if they are
+	 * reasonable (ie. over 64MB)
+	 */
+	if (zfs_arc_max > 64<<20 && zfs_arc_max < physmem * PAGESIZE)
+		arc_c_max = zfs_arc_max;
+	if (zfs_arc_min > 64<<20 && zfs_arc_min <= arc_c_max)
+		arc_c_min = zfs_arc_min;
+
+	arc_c = arc_c_max;
+	arc_p = (arc_c >> 1);
+
+	/* limit meta-data to 1/4 of the arc capacity */
+	arc_meta_limit = arc_c_max / 4;
+
+	/* Allow the tunable to override if it is reasonable */
+	if (zfs_arc_meta_limit > 0 && zfs_arc_meta_limit <= arc_c_max)
+		arc_meta_limit = zfs_arc_meta_limit;
+
+	if (arc_c_min < arc_meta_limit / 2 && zfs_arc_min == 0)
+		arc_c_min = arc_meta_limit / 2;
+
+	if (zfs_arc_grow_retry > 0)
+		arc_grow_retry = zfs_arc_grow_retry;
+
+	if (zfs_arc_shrink_shift > 0)
+		arc_shrink_shift = zfs_arc_shrink_shift;
+
+	if (zfs_arc_p_min_shift > 0)
+		arc_p_min_shift = zfs_arc_p_min_shift;
+
+	/* if kmem_flags are set, lets try to use less memory */
+	if (kmem_debugging())
+		arc_c = arc_c / 2;
+	if (arc_c < arc_c_min)
+		arc_c = arc_c_min;
+
+	arc_anon = &ARC_anon;
+	arc_mru = &ARC_mru;
+	arc_mru_ghost = &ARC_mru_ghost;
+	arc_mfu = &ARC_mfu;
+	arc_mfu_ghost = &ARC_mfu_ghost;
+	arc_l2c_only = &ARC_l2c_only;
+	arc_size = 0;
+
+	mutex_init(&arc_anon->arcs_mtx, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&arc_mru->arcs_mtx, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&arc_mru_ghost->arcs_mtx, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&arc_mfu->arcs_mtx, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&arc_mfu_ghost->arcs_mtx, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&arc_l2c_only->arcs_mtx, NULL, MUTEX_DEFAULT, NULL);
+
+	list_create(&arc_mru->arcs_list[ARC_BUFC_METADATA],
+	    sizeof (arc_buf_hdr_t), offsetof(arc_buf_hdr_t, b_arc_node));
+	list_create(&arc_mru->arcs_list[ARC_BUFC_DATA],
+	    sizeof (arc_buf_hdr_t), offsetof(arc_buf_hdr_t, b_arc_node));
+	list_create(&arc_mru_ghost->arcs_list[ARC_BUFC_METADATA],
+	    sizeof (arc_buf_hdr_t), offsetof(arc_buf_hdr_t, b_arc_node));
+	list_create(&arc_mru_ghost->arcs_list[ARC_BUFC_DATA],
+	    sizeof (arc_buf_hdr_t), offsetof(arc_buf_hdr_t, b_arc_node));
+	list_create(&arc_mfu->arcs_list[ARC_BUFC_METADATA],
+	    sizeof (arc_buf_hdr_t), offsetof(arc_buf_hdr_t, b_arc_node));
+	list_create(&arc_mfu->arcs_list[ARC_BUFC_DATA],
+	    sizeof (arc_buf_hdr_t), offsetof(arc_buf_hdr_t, b_arc_node));
+	list_create(&arc_mfu_ghost->arcs_list[ARC_BUFC_METADATA],
+	    sizeof (arc_buf_hdr_t), offsetof(arc_buf_hdr_t, b_arc_node));
+	list_create(&arc_mfu_ghost->arcs_list[ARC_BUFC_DATA],
+	    sizeof (arc_buf_hdr_t), offsetof(arc_buf_hdr_t, b_arc_node));
+	list_create(&arc_l2c_only->arcs_list[ARC_BUFC_METADATA],
+	    sizeof (arc_buf_hdr_t), offsetof(arc_buf_hdr_t, b_arc_node));
+	list_create(&arc_l2c_only->arcs_list[ARC_BUFC_DATA],
+	    sizeof (arc_buf_hdr_t), offsetof(arc_buf_hdr_t, b_arc_node));
+
+	buf_init();
+
+	arc_thread_exit = 0;
+	arc_eviction_list = NULL;
+	mutex_init(&arc_eviction_mtx, NULL, MUTEX_DEFAULT, NULL);
+	bzero(&arc_eviction_hdr, sizeof (arc_buf_hdr_t));
+
+	arc_ksp = kstat_create("zfs", 0, "arcstats", "misc", KSTAT_TYPE_NAMED,
+	    sizeof (arc_stats) / sizeof (kstat_named_t), KSTAT_FLAG_VIRTUAL);
+
+	if (arc_ksp != NULL) {
+		arc_ksp->ks_data = &arc_stats;
+		kstat_install(arc_ksp);
+	}
+
+	(void) thread_create(NULL, 0, arc_reclaim_thread, NULL, 0, &p0,
+	    TS_RUN, minclsyspri);
+
+	arc_dead = FALSE;
+	arc_warm = B_FALSE;
+
+	if (zfs_write_limit_max == 0)
+		zfs_write_limit_max = ptob(physmem) >> zfs_write_limit_shift;
+	else
+		zfs_write_limit_shift = 0;
+	mutex_init(&zfs_write_limit_lock, NULL, MUTEX_DEFAULT, NULL);
+}
+
+void
+arc_fini(void)
+{
+	mutex_enter(&arc_reclaim_thr_lock);
+	arc_thread_exit = 1;
+	while (arc_thread_exit != 0)
+		cv_wait(&arc_reclaim_thr_cv, &arc_reclaim_thr_lock);
+	mutex_exit(&arc_reclaim_thr_lock);
+
+	arc_flush(NULL);
+
+	arc_dead = TRUE;
+
+	if (arc_ksp != NULL) {
+		kstat_delete(arc_ksp);
+		arc_ksp = NULL;
+	}
+
+	mutex_destroy(&arc_eviction_mtx);
+	mutex_destroy(&arc_reclaim_thr_lock);
+	cv_destroy(&arc_reclaim_thr_cv);
+
+	list_destroy(&arc_mru->arcs_list[ARC_BUFC_METADATA]);
+	list_destroy(&arc_mru_ghost->arcs_list[ARC_BUFC_METADATA]);
+	list_destroy(&arc_mfu->arcs_list[ARC_BUFC_METADATA]);
+	list_destroy(&arc_mfu_ghost->arcs_list[ARC_BUFC_METADATA]);
+	list_destroy(&arc_mru->arcs_list[ARC_BUFC_DATA]);
+	list_destroy(&arc_mru_ghost->arcs_list[ARC_BUFC_DATA]);
+	list_destroy(&arc_mfu->arcs_list[ARC_BUFC_DATA]);
+	list_destroy(&arc_mfu_ghost->arcs_list[ARC_BUFC_DATA]);
+
+	mutex_destroy(&arc_anon->arcs_mtx);
+	mutex_destroy(&arc_mru->arcs_mtx);
+	mutex_destroy(&arc_mru_ghost->arcs_mtx);
+	mutex_destroy(&arc_mfu->arcs_mtx);
+	mutex_destroy(&arc_mfu_ghost->arcs_mtx);
+	mutex_destroy(&arc_l2c_only->arcs_mtx);
+
+	mutex_destroy(&zfs_write_limit_lock);
+
+	buf_fini();
+
+	ASSERT(arc_loaned_bytes == 0);
+}
+
+/*
+ * Level 2 ARC
+ *
+ * The level 2 ARC (L2ARC) is a cache layer in-between main memory and disk.
+ * It uses dedicated storage devices to hold cached data, which are populated
+ * using large infrequent writes.  The main role of this cache is to boost
+ * the performance of random read workloads.  The intended L2ARC devices
+ * include short-stroked disks, solid state disks, and other media with
+ * substantially faster read latency than disk.
+ *
+ *                 +-----------------------+
+ *                 |         ARC           |
+ *                 +-----------------------+
+ *                    |         ^     ^
+ *                    |         |     |
+ *      l2arc_feed_thread()    arc_read()
+ *                    |         |     |
+ *                    |  l2arc read   |
+ *                    V         |     |
+ *               +---------------+    |
+ *               |     L2ARC     |    |
+ *               +---------------+    |
+ *                   |    ^           |
+ *          l2arc_write() |           |
+ *                   |    |           |
+ *                   V    |           |
+ *                 +-------+      +-------+
+ *                 | vdev  |      | vdev  |
+ *                 | cache |      | cache |
+ *                 +-------+      +-------+
+ *                 +=========+     .-----.
+ *                 :  L2ARC  :    |-_____-|
+ *                 : devices :    | Disks |
+ *                 +=========+    `-_____-'
+ *
+ * Read requests are satisfied from the following sources, in order:
+ *
+ *	1) ARC
+ *	2) vdev cache of L2ARC devices
+ *	3) L2ARC devices
+ *	4) vdev cache of disks
+ *	5) disks
+ *
+ * Some L2ARC device types exhibit extremely slow write performance.
+ * To accommodate for this there are some significant differences between
+ * the L2ARC and traditional cache design:
+ *
+ * 1. There is no eviction path from the ARC to the L2ARC.  Evictions from
+ * the ARC behave as usual, freeing buffers and placing headers on ghost
+ * lists.  The ARC does not send buffers to the L2ARC during eviction as
+ * this would add inflated write latencies for all ARC memory pressure.
+ *
+ * 2. The L2ARC attempts to cache data from the ARC before it is evicted.
+ * It does this by periodically scanning buffers from the eviction-end of
+ * the MFU and MRU ARC lists, copying them to the L2ARC devices if they are
+ * not already there.  It scans until a headroom of buffers is satisfied,
+ * which itself is a buffer for ARC eviction.  The thread that does this is
+ * l2arc_feed_thread(), illustrated below; example sizes are included to
+ * provide a better sense of ratio than this diagram:
+ *
+ *	       head -->                        tail
+ *	        +---------------------+----------+
+ *	ARC_mfu |:::::#:::::::::::::::|o#o###o###|-->.   # already on L2ARC
+ *	        +---------------------+----------+   |   o L2ARC eligible
+ *	ARC_mru |:#:::::::::::::::::::|#o#ooo####|-->|   : ARC buffer
+ *	        +---------------------+----------+   |
+ *	             15.9 Gbytes      ^ 32 Mbytes    |
+ *	                           headroom          |
+ *	                                      l2arc_feed_thread()
+ *	                                             |
+ *	                 l2arc write hand <--[oooo]--'
+ *	                         |           8 Mbyte
+ *	                         |          write max
+ *	                         V
+ *		  +==============================+
+ *	L2ARC dev |####|#|###|###|    |####| ... |
+ *	          +==============================+
+ *	                     32 Gbytes
+ *
+ * 3. If an ARC buffer is copied to the L2ARC but then hit instead of
+ * evicted, then the L2ARC has cached a buffer much sooner than it probably
+ * needed to, potentially wasting L2ARC device bandwidth and storage.  It is
+ * safe to say that this is an uncommon case, since buffers at the end of
+ * the ARC lists have moved there due to inactivity.
+ *
+ * 4. If the ARC evicts faster than the L2ARC can maintain a headroom,
+ * then the L2ARC simply misses copying some buffers.  This serves as a
+ * pressure valve to prevent heavy read workloads from both stalling the ARC
+ * with waits and clogging the L2ARC with writes.  This also helps prevent
+ * the potential for the L2ARC to churn if it attempts to cache content too
+ * quickly, such as during backups of the entire pool.
+ *
+ * 5. After system boot and before the ARC has filled main memory, there are
+ * no evictions from the ARC and so the tails of the ARC_mfu and ARC_mru
+ * lists can remain mostly static.  Instead of searching from tail of these
+ * lists as pictured, the l2arc_feed_thread() will search from the list heads
+ * for eligible buffers, greatly increasing its chance of finding them.
+ *
+ * The L2ARC device write speed is also boosted during this time so that
+ * the L2ARC warms up faster.  Since there have been no ARC evictions yet,
+ * there are no L2ARC reads, and no fear of degrading read performance
+ * through increased writes.
+ *
+ * 6. Writes to the L2ARC devices are grouped and sent in-sequence, so that
+ * the vdev queue can aggregate them into larger and fewer writes.  Each
+ * device is written to in a rotor fashion, sweeping writes through
+ * available space then repeating.
+ *
+ * 7. The L2ARC does not store dirty content.  It never needs to flush
+ * write buffers back to disk based storage.
+ *
+ * 8. If an ARC buffer is written (and dirtied) which also exists in the
+ * L2ARC, the now stale L2ARC buffer is immediately dropped.
+ *
+ * The performance of the L2ARC can be tweaked by a number of tunables, which
+ * may be necessary for different workloads:
+ *
+ *	l2arc_write_max		max write bytes per interval
+ *	l2arc_write_boost	extra write bytes during device warmup
+ *	l2arc_noprefetch	skip caching prefetched buffers
+ *	l2arc_headroom		number of max device writes to precache
+ *	l2arc_feed_secs		seconds between L2ARC writing
+ *
+ * Tunables may be removed or added as future performance improvements are
+ * integrated, and also may become zpool properties.
+ *
+ * There are three key functions that control how the L2ARC warms up:
+ *
+ *	l2arc_write_eligible()	check if a buffer is eligible to cache
+ *	l2arc_write_size()	calculate how much to write
+ *	l2arc_write_interval()	calculate sleep delay between writes
+ *
+ * These three functions determine what to write, how much, and how quickly
+ * to send writes.
+ */
+
+static boolean_t
+l2arc_write_eligible(uint64_t spa_guid, arc_buf_hdr_t *ab)
+{
+	/*
+	 * A buffer is *not* eligible for the L2ARC if it:
+	 * 1. belongs to a different spa.
+	 * 2. is already cached on the L2ARC.
+	 * 3. has an I/O in progress (it may be an incomplete read).
+	 * 4. is flagged not eligible (zfs property).
+	 */
+	if (ab->b_spa != spa_guid || ab->b_l2hdr != NULL ||
+	    HDR_IO_IN_PROGRESS(ab) || !HDR_L2CACHE(ab))
+		return (B_FALSE);
+
+	return (B_TRUE);
+}
+
+static uint64_t
+l2arc_write_size(l2arc_dev_t *dev)
+{
+	uint64_t size;
+
+	size = dev->l2ad_write;
+
+	if (arc_warm == B_FALSE)
+		size += dev->l2ad_boost;
+
+	return (size);
+
+}
+
+static clock_t
+l2arc_write_interval(clock_t began, uint64_t wanted, uint64_t wrote)
+{
+	clock_t interval, next, now;
+
+	/*
+	 * If the ARC lists are busy, increase our write rate; if the
+	 * lists are stale, idle back.  This is achieved by checking
+	 * how much we previously wrote - if it was more than half of
+	 * what we wanted, schedule the next write much sooner.
+	 */
+	if (l2arc_feed_again && wrote > (wanted / 2))
+		interval = (hz * l2arc_feed_min_ms) / 1000;
+	else
+		interval = hz * l2arc_feed_secs;
+
+	now = ddi_get_lbolt();
+	next = MAX(now, MIN(now + interval, began + interval));
+
+	return (next);
+}
+
+static void
+l2arc_hdr_stat_add(void)
+{
+	ARCSTAT_INCR(arcstat_l2_hdr_size, HDR_SIZE + L2HDR_SIZE);
+	ARCSTAT_INCR(arcstat_hdr_size, -HDR_SIZE);
+}
+
+static void
+l2arc_hdr_stat_remove(void)
+{
+	ARCSTAT_INCR(arcstat_l2_hdr_size, -(HDR_SIZE + L2HDR_SIZE));
+	ARCSTAT_INCR(arcstat_hdr_size, HDR_SIZE);
+}
+
+/*
+ * Cycle through L2ARC devices.  This is how L2ARC load balances.
+ * If a device is returned, this also returns holding the spa config lock.
+ */
+static l2arc_dev_t *
+l2arc_dev_get_next(void)
+{
+	l2arc_dev_t *first, *next = NULL;
+
+	/*
+	 * Lock out the removal of spas (spa_namespace_lock), then removal
+	 * of cache devices (l2arc_dev_mtx).  Once a device has been selected,
+	 * both locks will be dropped and a spa config lock held instead.
+	 */
+	mutex_enter(&spa_namespace_lock);
+	mutex_enter(&l2arc_dev_mtx);
+
+	/* if there are no vdevs, there is nothing to do */
+	if (l2arc_ndev == 0)
+		goto out;
+
+	first = NULL;
+	next = l2arc_dev_last;
+	do {
+		/* loop around the list looking for a non-faulted vdev */
+		if (next == NULL) {
+			next = list_head(l2arc_dev_list);
+		} else {
+			next = list_next(l2arc_dev_list, next);
+			if (next == NULL)
+				next = list_head(l2arc_dev_list);
+		}
+
+		/* if we have come back to the start, bail out */
+		if (first == NULL)
+			first = next;
+		else if (next == first)
+			break;
+
+	} while (vdev_is_dead(next->l2ad_vdev));
+
+	/* if we were unable to find any usable vdevs, return NULL */
+	if (vdev_is_dead(next->l2ad_vdev))
+		next = NULL;
+
+	l2arc_dev_last = next;
+
+out:
+	mutex_exit(&l2arc_dev_mtx);
+
+	/*
+	 * Grab the config lock to prevent the 'next' device from being
+	 * removed while we are writing to it.
+	 */
+	if (next != NULL)
+		spa_config_enter(next->l2ad_spa, SCL_L2ARC, next, RW_READER);
+	mutex_exit(&spa_namespace_lock);
+
+	return (next);
+}
+
+/*
+ * Free buffers that were tagged for destruction.
+ */
+static void
+l2arc_do_free_on_write()
+{
+	list_t *buflist;
+	l2arc_data_free_t *df, *df_prev;
+
+	mutex_enter(&l2arc_free_on_write_mtx);
+	buflist = l2arc_free_on_write;
+
+	for (df = list_tail(buflist); df; df = df_prev) {
+		df_prev = list_prev(buflist, df);
+		ASSERT(df->l2df_data != NULL);
+		ASSERT(df->l2df_func != NULL);
+		df->l2df_func(df->l2df_data, df->l2df_size);
+		list_remove(buflist, df);
+		kmem_free(df, sizeof (l2arc_data_free_t));
+	}
+
+	mutex_exit(&l2arc_free_on_write_mtx);
+}
+
+/*
+ * A write to a cache device has completed.  Update all headers to allow
+ * reads from these buffers to begin.
+ */
+static void
+l2arc_write_done(zio_t *zio)
+{
+	l2arc_write_callback_t *cb;
+	l2arc_dev_t *dev;
+	list_t *buflist;
+	arc_buf_hdr_t *head, *ab, *ab_prev;
+	l2arc_buf_hdr_t *abl2;
+	kmutex_t *hash_lock;
+
+	cb = zio->io_private;
+	ASSERT(cb != NULL);
+	dev = cb->l2wcb_dev;
+	ASSERT(dev != NULL);
+	head = cb->l2wcb_head;
+	ASSERT(head != NULL);
+	buflist = dev->l2ad_buflist;
+	ASSERT(buflist != NULL);
+	DTRACE_PROBE2(l2arc__iodone, zio_t *, zio,
+	    l2arc_write_callback_t *, cb);
+
+	if (zio->io_error != 0)
+		ARCSTAT_BUMP(arcstat_l2_writes_error);
+
+	mutex_enter(&l2arc_buflist_mtx);
+
+	/*
+	 * All writes completed, or an error was hit.
+	 */
+	for (ab = list_prev(buflist, head); ab; ab = ab_prev) {
+		ab_prev = list_prev(buflist, ab);
+
+		hash_lock = HDR_LOCK(ab);
+		if (!mutex_tryenter(hash_lock)) {
+			/*
+			 * This buffer misses out.  It may be in a stage
+			 * of eviction.  Its ARC_L2_WRITING flag will be
+			 * left set, denying reads to this buffer.
+			 */
+			ARCSTAT_BUMP(arcstat_l2_writes_hdr_miss);
+			continue;
+		}
+
+		if (zio->io_error != 0) {
+			/*
+			 * Error - drop L2ARC entry.
+			 */
+			list_remove(buflist, ab);
+			abl2 = ab->b_l2hdr;
+			ab->b_l2hdr = NULL;
+			kmem_free(abl2, sizeof (l2arc_buf_hdr_t));
+			ARCSTAT_INCR(arcstat_l2_size, -ab->b_size);
+		}
+
+		/*
+		 * Allow ARC to begin reads to this L2ARC entry.
+		 */
+		ab->b_flags &= ~ARC_L2_WRITING;
+
+		mutex_exit(hash_lock);
+	}
+
+	atomic_inc_64(&l2arc_writes_done);
+	list_remove(buflist, head);
+	kmem_cache_free(hdr_cache, head);
+	mutex_exit(&l2arc_buflist_mtx);
+
+	l2arc_do_free_on_write();
+
+	kmem_free(cb, sizeof (l2arc_write_callback_t));
+}
+
+/*
+ * A read to a cache device completed.  Validate buffer contents before
+ * handing over to the regular ARC routines.
+ */
+static void
+l2arc_read_done(zio_t *zio)
+{
+	l2arc_read_callback_t *cb;
+	arc_buf_hdr_t *hdr;
+	arc_buf_t *buf;
+	kmutex_t *hash_lock;
+	int equal;
+
+	ASSERT(zio->io_vd != NULL);
+	ASSERT(zio->io_flags & ZIO_FLAG_DONT_PROPAGATE);
+
+	spa_config_exit(zio->io_spa, SCL_L2ARC, zio->io_vd);
+
+	cb = zio->io_private;
+	ASSERT(cb != NULL);
+	buf = cb->l2rcb_buf;
+	ASSERT(buf != NULL);
+
+	hash_lock = HDR_LOCK(buf->b_hdr);
+	mutex_enter(hash_lock);
+	hdr = buf->b_hdr;
+	ASSERT3P(hash_lock, ==, HDR_LOCK(hdr));
+
+	/*
+	 * Check this survived the L2ARC journey.
+	 */
+	equal = arc_cksum_equal(buf);
+	if (equal && zio->io_error == 0 && !HDR_L2_EVICTED(hdr)) {
+		mutex_exit(hash_lock);
+		zio->io_private = buf;
+		zio->io_bp_copy = cb->l2rcb_bp;	/* XXX fix in L2ARC 2.0	*/
+		zio->io_bp = &zio->io_bp_copy;	/* XXX fix in L2ARC 2.0	*/
+		arc_read_done(zio);
+	} else {
+		mutex_exit(hash_lock);
+		/*
+		 * Buffer didn't survive caching.  Increment stats and
+		 * reissue to the original storage device.
+		 */
+		if (zio->io_error != 0) {
+			ARCSTAT_BUMP(arcstat_l2_io_error);
+		} else {
+			zio->io_error = EIO;
+		}
+		if (!equal)
+			ARCSTAT_BUMP(arcstat_l2_cksum_bad);
+
+		/*
+		 * If there's no waiter, issue an async i/o to the primary
+		 * storage now.  If there *is* a waiter, the caller must
+		 * issue the i/o in a context where it's OK to block.
+		 */
+		if (zio->io_waiter == NULL) {
+			zio_t *pio = zio_unique_parent(zio);
+
+			ASSERT(!pio || pio->io_child_type == ZIO_CHILD_LOGICAL);
+
+			zio_nowait(zio_read(pio, cb->l2rcb_spa, &cb->l2rcb_bp,
+			    buf->b_data, zio->io_size, arc_read_done, buf,
+			    zio->io_priority, cb->l2rcb_flags, &cb->l2rcb_zb));
+		}
+	}
+
+	kmem_free(cb, sizeof (l2arc_read_callback_t));
+}
+
+/*
+ * This is the list priority from which the L2ARC will search for pages to
+ * cache.  This is used within loops (0..3) to cycle through lists in the
+ * desired order.  This order can have a significant effect on cache
+ * performance.
+ *
+ * Currently the metadata lists are hit first, MFU then MRU, followed by
+ * the data lists.  This function returns a locked list, and also returns
+ * the lock pointer.
+ */
+static list_t *
+l2arc_list_locked(int list_num, kmutex_t **lock)
+{
+	list_t *list;
+
+	ASSERT(list_num >= 0 && list_num <= 3);
+
+	switch (list_num) {
+	case 0:
+		list = &arc_mfu->arcs_list[ARC_BUFC_METADATA];
+		*lock = &arc_mfu->arcs_mtx;
+		break;
+	case 1:
+		list = &arc_mru->arcs_list[ARC_BUFC_METADATA];
+		*lock = &arc_mru->arcs_mtx;
+		break;
+	case 2:
+		list = &arc_mfu->arcs_list[ARC_BUFC_DATA];
+		*lock = &arc_mfu->arcs_mtx;
+		break;
+	case 3:
+		list = &arc_mru->arcs_list[ARC_BUFC_DATA];
+		*lock = &arc_mru->arcs_mtx;
+		break;
+	}
+
+	ASSERT(!(MUTEX_HELD(*lock)));
+	mutex_enter(*lock);
+	return (list);
+}
+
+/*
+ * Evict buffers from the device write hand to the distance specified in
+ * bytes.  This distance may span populated buffers, it may span nothing.
+ * This is clearing a region on the L2ARC device ready for writing.
+ * If the 'all' boolean is set, every buffer is evicted.
+ */
+static void
+l2arc_evict(l2arc_dev_t *dev, uint64_t distance, boolean_t all)
+{
+	list_t *buflist;
+	l2arc_buf_hdr_t *abl2;
+	arc_buf_hdr_t *ab, *ab_prev;
+	kmutex_t *hash_lock;
+	uint64_t taddr;
+
+	buflist = dev->l2ad_buflist;
+
+	if (buflist == NULL)
+		return;
+
+	if (!all && dev->l2ad_first) {
+		/*
+		 * This is the first sweep through the device.  There is
+		 * nothing to evict.
+		 */
+		return;
+	}
+
+	if (dev->l2ad_hand >= (dev->l2ad_end - (2 * distance))) {
+		/*
+		 * When nearing the end of the device, evict to the end
+		 * before the device write hand jumps to the start.
+		 */
+		taddr = dev->l2ad_end;
+	} else {
+		taddr = dev->l2ad_hand + distance;
+	}
+	DTRACE_PROBE4(l2arc__evict, l2arc_dev_t *, dev, list_t *, buflist,
+	    uint64_t, taddr, boolean_t, all);
+
+top:
+	mutex_enter(&l2arc_buflist_mtx);
+	for (ab = list_tail(buflist); ab; ab = ab_prev) {
+		ab_prev = list_prev(buflist, ab);
+
+		hash_lock = HDR_LOCK(ab);
+		if (!mutex_tryenter(hash_lock)) {
+			/*
+			 * Missed the hash lock.  Retry.
+			 */
+			ARCSTAT_BUMP(arcstat_l2_evict_lock_retry);
+			mutex_exit(&l2arc_buflist_mtx);
+			mutex_enter(hash_lock);
+			mutex_exit(hash_lock);
+			goto top;
+		}
+
+		if (HDR_L2_WRITE_HEAD(ab)) {
+			/*
+			 * We hit a write head node.  Leave it for
+			 * l2arc_write_done().
+			 */
+			list_remove(buflist, ab);
+			mutex_exit(hash_lock);
+			continue;
+		}
+
+		if (!all && ab->b_l2hdr != NULL &&
+		    (ab->b_l2hdr->b_daddr > taddr ||
+		    ab->b_l2hdr->b_daddr < dev->l2ad_hand)) {
+			/*
+			 * We've evicted to the target address,
+			 * or the end of the device.
+			 */
+			mutex_exit(hash_lock);
+			break;
+		}
+
+		if (HDR_FREE_IN_PROGRESS(ab)) {
+			/*
+			 * Already on the path to destruction.
+			 */
+			mutex_exit(hash_lock);
+			continue;
+		}
+
+		if (ab->b_state == arc_l2c_only) {
+			ASSERT(!HDR_L2_READING(ab));
+			/*
+			 * This doesn't exist in the ARC.  Destroy.
+			 * arc_hdr_destroy() will call list_remove()
+			 * and decrement arcstat_l2_size.
+			 */
+			arc_change_state(arc_anon, ab, hash_lock);
+			arc_hdr_destroy(ab);
+		} else {
+			/*
+			 * Invalidate issued or about to be issued
+			 * reads, since we may be about to write
+			 * over this location.
+			 */
+			if (HDR_L2_READING(ab)) {
+				ARCSTAT_BUMP(arcstat_l2_evict_reading);
+				ab->b_flags |= ARC_L2_EVICTED;
+			}
+
+			/*
+			 * Tell ARC this no longer exists in L2ARC.
+			 */
+			if (ab->b_l2hdr != NULL) {
+				abl2 = ab->b_l2hdr;
+				ab->b_l2hdr = NULL;
+				kmem_free(abl2, sizeof (l2arc_buf_hdr_t));
+				ARCSTAT_INCR(arcstat_l2_size, -ab->b_size);
+			}
+			list_remove(buflist, ab);
+
+			/*
+			 * This may have been leftover after a
+			 * failed write.
+			 */
+			ab->b_flags &= ~ARC_L2_WRITING;
+		}
+		mutex_exit(hash_lock);
+	}
+	mutex_exit(&l2arc_buflist_mtx);
+
+	vdev_space_update(dev->l2ad_vdev, -(taddr - dev->l2ad_evict), 0, 0);
+	dev->l2ad_evict = taddr;
+}
+
+/*
+ * Find and write ARC buffers to the L2ARC device.
+ *
+ * An ARC_L2_WRITING flag is set so that the L2ARC buffers are not valid
+ * for reading until they have completed writing.
+ */
+static uint64_t
+l2arc_write_buffers(spa_t *spa, l2arc_dev_t *dev, uint64_t target_sz)
+{
+	arc_buf_hdr_t *ab, *ab_prev, *head;
+	l2arc_buf_hdr_t *hdrl2;
+	list_t *list;
+	uint64_t passed_sz, write_sz, buf_sz, headroom;
+	void *buf_data;
+	kmutex_t *hash_lock, *list_lock;
+	boolean_t have_lock, full;
+	l2arc_write_callback_t *cb;
+	zio_t *pio, *wzio;
+	uint64_t guid = spa_guid(spa);
+
+	ASSERT(dev->l2ad_vdev != NULL);
+
+	pio = NULL;
+	write_sz = 0;
+	full = B_FALSE;
+	head = kmem_cache_alloc(hdr_cache, KM_PUSHPAGE);
+	head->b_flags |= ARC_L2_WRITE_HEAD;
+
+	/*
+	 * Copy buffers for L2ARC writing.
+	 */
+	mutex_enter(&l2arc_buflist_mtx);
+	for (int try = 0; try <= 3; try++) {
+		list = l2arc_list_locked(try, &list_lock);
+		passed_sz = 0;
+
+		/*
+		 * L2ARC fast warmup.
+		 *
+		 * Until the ARC is warm and starts to evict, read from the
+		 * head of the ARC lists rather than the tail.
+		 */
+		headroom = target_sz * l2arc_headroom;
+		if (arc_warm == B_FALSE)
+			ab = list_head(list);
+		else
+			ab = list_tail(list);
+
+		for (; ab; ab = ab_prev) {
+			if (arc_warm == B_FALSE)
+				ab_prev = list_next(list, ab);
+			else
+				ab_prev = list_prev(list, ab);
+
+			hash_lock = HDR_LOCK(ab);
+			have_lock = MUTEX_HELD(hash_lock);
+			if (!have_lock && !mutex_tryenter(hash_lock)) {
+				/*
+				 * Skip this buffer rather than waiting.
+				 */
+				continue;
+			}
+
+			passed_sz += ab->b_size;
+			if (passed_sz > headroom) {
+				/*
+				 * Searched too far.
+				 */
+				mutex_exit(hash_lock);
+				break;
+			}
+
+			if (!l2arc_write_eligible(guid, ab)) {
+				mutex_exit(hash_lock);
+				continue;
+			}
+
+			if ((write_sz + ab->b_size) > target_sz) {
+				full = B_TRUE;
+				mutex_exit(hash_lock);
+				break;
+			}
+
+			if (pio == NULL) {
+				/*
+				 * Insert a dummy header on the buflist so
+				 * l2arc_write_done() can find where the
+				 * write buffers begin without searching.
+				 */
+				list_insert_head(dev->l2ad_buflist, head);
+
+				cb = kmem_alloc(
+				    sizeof (l2arc_write_callback_t), KM_SLEEP);
+				cb->l2wcb_dev = dev;
+				cb->l2wcb_head = head;
+				pio = zio_root(spa, l2arc_write_done, cb,
+				    ZIO_FLAG_CANFAIL);
+			}
+
+			/*
+			 * Create and add a new L2ARC header.
+			 */
+			hdrl2 = kmem_zalloc(sizeof (l2arc_buf_hdr_t), KM_SLEEP);
+			hdrl2->b_dev = dev;
+			hdrl2->b_daddr = dev->l2ad_hand;
+
+			ab->b_flags |= ARC_L2_WRITING;
+			ab->b_l2hdr = hdrl2;
+			list_insert_head(dev->l2ad_buflist, ab);
+			buf_data = ab->b_buf->b_data;
+			buf_sz = ab->b_size;
+
+			/*
+			 * Compute and store the buffer cksum before
+			 * writing.  On debug the cksum is verified first.
+			 */
+			arc_cksum_verify(ab->b_buf);
+			arc_cksum_compute(ab->b_buf, B_TRUE);
+
+			mutex_exit(hash_lock);
+
+			wzio = zio_write_phys(pio, dev->l2ad_vdev,
+			    dev->l2ad_hand, buf_sz, buf_data, ZIO_CHECKSUM_OFF,
+			    NULL, NULL, ZIO_PRIORITY_ASYNC_WRITE,
+			    ZIO_FLAG_CANFAIL, B_FALSE);
+
+			DTRACE_PROBE2(l2arc__write, vdev_t *, dev->l2ad_vdev,
+			    zio_t *, wzio);
+			(void) zio_nowait(wzio);
+
+			/*
+			 * Keep the clock hand suitably device-aligned.
+			 */
+			buf_sz = vdev_psize_to_asize(dev->l2ad_vdev, buf_sz);
+
+			write_sz += buf_sz;
+			dev->l2ad_hand += buf_sz;
+		}
+
+		mutex_exit(list_lock);
+
+		if (full == B_TRUE)
+			break;
+	}
+	mutex_exit(&l2arc_buflist_mtx);
+
+	if (pio == NULL) {
+		ASSERT3U(write_sz, ==, 0);
+		kmem_cache_free(hdr_cache, head);
+		return (0);
+	}
+
+	ASSERT3U(write_sz, <=, target_sz);
+	ARCSTAT_BUMP(arcstat_l2_writes_sent);
+	ARCSTAT_INCR(arcstat_l2_write_bytes, write_sz);
+	ARCSTAT_INCR(arcstat_l2_size, write_sz);
+	vdev_space_update(dev->l2ad_vdev, write_sz, 0, 0);
+
+	/*
+	 * Bump device hand to the device start if it is approaching the end.
+	 * l2arc_evict() will already have evicted ahead for this case.
+	 */
+	if (dev->l2ad_hand >= (dev->l2ad_end - target_sz)) {
+		vdev_space_update(dev->l2ad_vdev,
+		    dev->l2ad_end - dev->l2ad_hand, 0, 0);
+		dev->l2ad_hand = dev->l2ad_start;
+		dev->l2ad_evict = dev->l2ad_start;
+		dev->l2ad_first = B_FALSE;
+	}
+
+	dev->l2ad_writing = B_TRUE;
+	(void) zio_wait(pio);
+	dev->l2ad_writing = B_FALSE;
+
+	return (write_sz);
+}
+
+/*
+ * This thread feeds the L2ARC at regular intervals.  This is the beating
+ * heart of the L2ARC.
+ */
+static void
+l2arc_feed_thread(void)
+{
+	callb_cpr_t cpr;
+	l2arc_dev_t *dev;
+	spa_t *spa;
+	uint64_t size, wrote;
+	clock_t begin, next = ddi_get_lbolt();
+
+	CALLB_CPR_INIT(&cpr, &l2arc_feed_thr_lock, callb_generic_cpr, FTAG);
+
+	mutex_enter(&l2arc_feed_thr_lock);
+
+	while (l2arc_thread_exit == 0) {
+		CALLB_CPR_SAFE_BEGIN(&cpr);
+		(void) cv_timedwait(&l2arc_feed_thr_cv, &l2arc_feed_thr_lock,
+		    next);
+		CALLB_CPR_SAFE_END(&cpr, &l2arc_feed_thr_lock);
+		next = ddi_get_lbolt() + hz;
+
+		/*
+		 * Quick check for L2ARC devices.
+		 */
+		mutex_enter(&l2arc_dev_mtx);
+		if (l2arc_ndev == 0) {
+			mutex_exit(&l2arc_dev_mtx);
+			continue;
+		}
+		mutex_exit(&l2arc_dev_mtx);
+		begin = ddi_get_lbolt();
+
+		/*
+		 * This selects the next l2arc device to write to, and in
+		 * doing so the next spa to feed from: dev->l2ad_spa.   This
+		 * will return NULL if there are now no l2arc devices or if
+		 * they are all faulted.
+		 *
+		 * If a device is returned, its spa's config lock is also
+		 * held to prevent device removal.  l2arc_dev_get_next()
+		 * will grab and release l2arc_dev_mtx.
+		 */
+		if ((dev = l2arc_dev_get_next()) == NULL)
+			continue;
+
+		spa = dev->l2ad_spa;
+		ASSERT(spa != NULL);
+
+		/*
+		 * If the pool is read-only then force the feed thread to
+		 * sleep a little longer.
+		 */
+		if (!spa_writeable(spa)) {
+			next = ddi_get_lbolt() + 5 * l2arc_feed_secs * hz;
+			spa_config_exit(spa, SCL_L2ARC, dev);
+			continue;
+		}
+
+		/*
+		 * Avoid contributing to memory pressure.
+		 */
+		if (arc_reclaim_needed()) {
+			ARCSTAT_BUMP(arcstat_l2_abort_lowmem);
+			spa_config_exit(spa, SCL_L2ARC, dev);
+			continue;
+		}
+
+		ARCSTAT_BUMP(arcstat_l2_feeds);
+
+		size = l2arc_write_size(dev);
+
+		/*
+		 * Evict L2ARC buffers that will be overwritten.
+		 */
+		l2arc_evict(dev, size, B_FALSE);
+
+		/*
+		 * Write ARC buffers.
+		 */
+		wrote = l2arc_write_buffers(spa, dev, size);
+
+		/*
+		 * Calculate interval between writes.
+		 */
+		next = l2arc_write_interval(begin, size, wrote);
+		spa_config_exit(spa, SCL_L2ARC, dev);
+	}
+
+	l2arc_thread_exit = 0;
+	cv_broadcast(&l2arc_feed_thr_cv);
+	CALLB_CPR_EXIT(&cpr);		/* drops l2arc_feed_thr_lock */
+	thread_exit();
+}
+
+boolean_t
+l2arc_vdev_present(vdev_t *vd)
+{
+	l2arc_dev_t *dev;
+
+	mutex_enter(&l2arc_dev_mtx);
+	for (dev = list_head(l2arc_dev_list); dev != NULL;
+	    dev = list_next(l2arc_dev_list, dev)) {
+		if (dev->l2ad_vdev == vd)
+			break;
+	}
+	mutex_exit(&l2arc_dev_mtx);
+
+	return (dev != NULL);
+}
+
+/*
+ * Add a vdev for use by the L2ARC.  By this point the spa has already
+ * validated the vdev and opened it.
+ */
+void
+l2arc_add_vdev(spa_t *spa, vdev_t *vd)
+{
+	l2arc_dev_t *adddev;
+
+	ASSERT(!l2arc_vdev_present(vd));
+
+	/*
+	 * Create a new l2arc device entry.
+	 */
+	adddev = kmem_zalloc(sizeof (l2arc_dev_t), KM_SLEEP);
+	adddev->l2ad_spa = spa;
+	adddev->l2ad_vdev = vd;
+	adddev->l2ad_write = l2arc_write_max;
+	adddev->l2ad_boost = l2arc_write_boost;
+	adddev->l2ad_start = VDEV_LABEL_START_SIZE;
+	adddev->l2ad_end = VDEV_LABEL_START_SIZE + vdev_get_min_asize(vd);
+	adddev->l2ad_hand = adddev->l2ad_start;
+	adddev->l2ad_evict = adddev->l2ad_start;
+	adddev->l2ad_first = B_TRUE;
+	adddev->l2ad_writing = B_FALSE;
+	ASSERT3U(adddev->l2ad_write, >, 0);
+
+	/*
+	 * This is a list of all ARC buffers that are still valid on the
+	 * device.
+	 */
+	adddev->l2ad_buflist = kmem_zalloc(sizeof (list_t), KM_SLEEP);
+	list_create(adddev->l2ad_buflist, sizeof (arc_buf_hdr_t),
+	    offsetof(arc_buf_hdr_t, b_l2node));
+
+	vdev_space_update(vd, 0, 0, adddev->l2ad_end - adddev->l2ad_hand);
+
+	/*
+	 * Add device to global list
+	 */
+	mutex_enter(&l2arc_dev_mtx);
+	list_insert_head(l2arc_dev_list, adddev);
+	atomic_inc_64(&l2arc_ndev);
+	mutex_exit(&l2arc_dev_mtx);
+}
+
+/*
+ * Remove a vdev from the L2ARC.
+ */
+void
+l2arc_remove_vdev(vdev_t *vd)
+{
+	l2arc_dev_t *dev, *nextdev, *remdev = NULL;
+
+	/*
+	 * Find the device by vdev
+	 */
+	mutex_enter(&l2arc_dev_mtx);
+	for (dev = list_head(l2arc_dev_list); dev; dev = nextdev) {
+		nextdev = list_next(l2arc_dev_list, dev);
+		if (vd == dev->l2ad_vdev) {
+			remdev = dev;
+			break;
+		}
+	}
+	ASSERT(remdev != NULL);
+
+	/*
+	 * Remove device from global list
+	 */
+	list_remove(l2arc_dev_list, remdev);
+	l2arc_dev_last = NULL;		/* may have been invalidated */
+	atomic_dec_64(&l2arc_ndev);
+	mutex_exit(&l2arc_dev_mtx);
+
+	/*
+	 * Clear all buflists and ARC references.  L2ARC device flush.
+	 */
+	l2arc_evict(remdev, 0, B_TRUE);
+	list_destroy(remdev->l2ad_buflist);
+	kmem_free(remdev->l2ad_buflist, sizeof (list_t));
+	kmem_free(remdev, sizeof (l2arc_dev_t));
+}
+
+void
+l2arc_init(void)
+{
+	l2arc_thread_exit = 0;
+	l2arc_ndev = 0;
+	l2arc_writes_sent = 0;
+	l2arc_writes_done = 0;
+
+	mutex_init(&l2arc_feed_thr_lock, NULL, MUTEX_DEFAULT, NULL);
+	cv_init(&l2arc_feed_thr_cv, NULL, CV_DEFAULT, NULL);
+	mutex_init(&l2arc_dev_mtx, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&l2arc_buflist_mtx, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&l2arc_free_on_write_mtx, NULL, MUTEX_DEFAULT, NULL);
+
+	l2arc_dev_list = &L2ARC_dev_list;
+	l2arc_free_on_write = &L2ARC_free_on_write;
+	list_create(l2arc_dev_list, sizeof (l2arc_dev_t),
+	    offsetof(l2arc_dev_t, l2ad_node));
+	list_create(l2arc_free_on_write, sizeof (l2arc_data_free_t),
+	    offsetof(l2arc_data_free_t, l2df_list_node));
+}
+
+void
+l2arc_fini(void)
+{
+	/*
+	 * This is called from dmu_fini(), which is called from spa_fini();
+	 * Because of this, we can assume that all l2arc devices have
+	 * already been removed when the pools themselves were removed.
+	 */
+
+	l2arc_do_free_on_write();
+
+	mutex_destroy(&l2arc_feed_thr_lock);
+	cv_destroy(&l2arc_feed_thr_cv);
+	mutex_destroy(&l2arc_dev_mtx);
+	mutex_destroy(&l2arc_buflist_mtx);
+	mutex_destroy(&l2arc_free_on_write_mtx);
+
+	list_destroy(l2arc_dev_list);
+	list_destroy(l2arc_free_on_write);
+}
+
+void
+l2arc_start(void)
+{
+	if (!(spa_mode_global & FWRITE))
+		return;
+
+	(void) thread_create(NULL, 0, l2arc_feed_thread, NULL, 0, &p0,
+	    TS_RUN, minclsyspri);
+}
+
+void
+l2arc_stop(void)
+{
+	if (!(spa_mode_global & FWRITE))
+		return;
+
+	mutex_enter(&l2arc_feed_thr_lock);
+	cv_signal(&l2arc_feed_thr_cv);	/* kick thread out of startup */
+	l2arc_thread_exit = 1;
+	while (l2arc_thread_exit != 0)
+		cv_wait(&l2arc_feed_thr_cv, &l2arc_feed_thr_lock);
+	mutex_exit(&l2arc_feed_thr_lock);
+}
diff --git a/uts/common/fs/zfs/bplist.c b/uts/common/fs/zfs/bplist.c
new file mode 100644
index 000000000000..066ccc6b1e05
--- /dev/null
+++ b/uts/common/fs/zfs/bplist.c
@@ -0,0 +1,69 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/bplist.h>
+#include <sys/zfs_context.h>
+
+
+void
+bplist_create(bplist_t *bpl)
+{
+	mutex_init(&bpl->bpl_lock, NULL, MUTEX_DEFAULT, NULL);
+	list_create(&bpl->bpl_list, sizeof (bplist_entry_t),
+	    offsetof(bplist_entry_t, bpe_node));
+}
+
+void
+bplist_destroy(bplist_t *bpl)
+{
+	list_destroy(&bpl->bpl_list);
+	mutex_destroy(&bpl->bpl_lock);
+}
+
+void
+bplist_append(bplist_t *bpl, const blkptr_t *bp)
+{
+	bplist_entry_t *bpe = kmem_alloc(sizeof (*bpe), KM_SLEEP);
+
+	mutex_enter(&bpl->bpl_lock);
+	bpe->bpe_blk = *bp;
+	list_insert_tail(&bpl->bpl_list, bpe);
+	mutex_exit(&bpl->bpl_lock);
+}
+
+void
+bplist_iterate(bplist_t *bpl, bplist_itor_t *func, void *arg, dmu_tx_t *tx)
+{
+	bplist_entry_t *bpe;
+
+	mutex_enter(&bpl->bpl_lock);
+	while (bpe = list_head(&bpl->bpl_list)) {
+		list_remove(&bpl->bpl_list, bpe);
+		mutex_exit(&bpl->bpl_lock);
+		func(arg, &bpe->bpe_blk, tx);
+		kmem_free(bpe, sizeof (*bpe));
+		mutex_enter(&bpl->bpl_lock);
+	}
+	mutex_exit(&bpl->bpl_lock);
+}
diff --git a/uts/common/fs/zfs/bpobj.c b/uts/common/fs/zfs/bpobj.c
new file mode 100644
index 000000000000..72be31235607
--- /dev/null
+++ b/uts/common/fs/zfs/bpobj.c
@@ -0,0 +1,495 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/bpobj.h>
+#include <sys/zfs_context.h>
+#include <sys/refcount.h>
+
+uint64_t
+bpobj_alloc(objset_t *os, int blocksize, dmu_tx_t *tx)
+{
+	int size;
+
+	if (spa_version(dmu_objset_spa(os)) < SPA_VERSION_BPOBJ_ACCOUNT)
+		size = BPOBJ_SIZE_V0;
+	else if (spa_version(dmu_objset_spa(os)) < SPA_VERSION_DEADLISTS)
+		size = BPOBJ_SIZE_V1;
+	else
+		size = sizeof (bpobj_phys_t);
+
+	return (dmu_object_alloc(os, DMU_OT_BPOBJ, blocksize,
+	    DMU_OT_BPOBJ_HDR, size, tx));
+}
+
+void
+bpobj_free(objset_t *os, uint64_t obj, dmu_tx_t *tx)
+{
+	int64_t i;
+	bpobj_t bpo;
+	dmu_object_info_t doi;
+	int epb;
+	dmu_buf_t *dbuf = NULL;
+
+	VERIFY3U(0, ==, bpobj_open(&bpo, os, obj));
+
+	mutex_enter(&bpo.bpo_lock);
+
+	if (!bpo.bpo_havesubobj || bpo.bpo_phys->bpo_subobjs == 0)
+		goto out;
+
+	VERIFY3U(0, ==, dmu_object_info(os, bpo.bpo_phys->bpo_subobjs, &doi));
+	epb = doi.doi_data_block_size / sizeof (uint64_t);
+
+	for (i = bpo.bpo_phys->bpo_num_subobjs - 1; i >= 0; i--) {
+		uint64_t *objarray;
+		uint64_t offset, blkoff;
+
+		offset = i * sizeof (uint64_t);
+		blkoff = P2PHASE(i, epb);
+
+		if (dbuf == NULL || dbuf->db_offset > offset) {
+			if (dbuf)
+				dmu_buf_rele(dbuf, FTAG);
+			VERIFY3U(0, ==, dmu_buf_hold(os,
+			    bpo.bpo_phys->bpo_subobjs, offset, FTAG, &dbuf, 0));
+		}
+
+		ASSERT3U(offset, >=, dbuf->db_offset);
+		ASSERT3U(offset, <, dbuf->db_offset + dbuf->db_size);
+
+		objarray = dbuf->db_data;
+		bpobj_free(os, objarray[blkoff], tx);
+	}
+	if (dbuf) {
+		dmu_buf_rele(dbuf, FTAG);
+		dbuf = NULL;
+	}
+	VERIFY3U(0, ==, dmu_object_free(os, bpo.bpo_phys->bpo_subobjs, tx));
+
+out:
+	mutex_exit(&bpo.bpo_lock);
+	bpobj_close(&bpo);
+
+	VERIFY3U(0, ==, dmu_object_free(os, obj, tx));
+}
+
+int
+bpobj_open(bpobj_t *bpo, objset_t *os, uint64_t object)
+{
+	dmu_object_info_t doi;
+	int err;
+
+	err = dmu_object_info(os, object, &doi);
+	if (err)
+		return (err);
+
+	bzero(bpo, sizeof (*bpo));
+	mutex_init(&bpo->bpo_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	ASSERT(bpo->bpo_dbuf == NULL);
+	ASSERT(bpo->bpo_phys == NULL);
+	ASSERT(object != 0);
+	ASSERT3U(doi.doi_type, ==, DMU_OT_BPOBJ);
+	ASSERT3U(doi.doi_bonus_type, ==, DMU_OT_BPOBJ_HDR);
+
+	err = dmu_bonus_hold(os, object, bpo, &bpo->bpo_dbuf);
+	if (err)
+		return (err);
+
+	bpo->bpo_os = os;
+	bpo->bpo_object = object;
+	bpo->bpo_epb = doi.doi_data_block_size >> SPA_BLKPTRSHIFT;
+	bpo->bpo_havecomp = (doi.doi_bonus_size > BPOBJ_SIZE_V0);
+	bpo->bpo_havesubobj = (doi.doi_bonus_size > BPOBJ_SIZE_V1);
+	bpo->bpo_phys = bpo->bpo_dbuf->db_data;
+	return (0);
+}
+
+void
+bpobj_close(bpobj_t *bpo)
+{
+	/* Lame workaround for closing a bpobj that was never opened. */
+	if (bpo->bpo_object == 0)
+		return;
+
+	dmu_buf_rele(bpo->bpo_dbuf, bpo);
+	if (bpo->bpo_cached_dbuf != NULL)
+		dmu_buf_rele(bpo->bpo_cached_dbuf, bpo);
+	bpo->bpo_dbuf = NULL;
+	bpo->bpo_phys = NULL;
+	bpo->bpo_cached_dbuf = NULL;
+	bpo->bpo_object = 0;
+
+	mutex_destroy(&bpo->bpo_lock);
+}
+
+static int
+bpobj_iterate_impl(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx,
+    boolean_t free)
+{
+	dmu_object_info_t doi;
+	int epb;
+	int64_t i;
+	int err = 0;
+	dmu_buf_t *dbuf = NULL;
+
+	mutex_enter(&bpo->bpo_lock);
+
+	if (free)
+		dmu_buf_will_dirty(bpo->bpo_dbuf, tx);
+
+	for (i = bpo->bpo_phys->bpo_num_blkptrs - 1; i >= 0; i--) {
+		blkptr_t *bparray;
+		blkptr_t *bp;
+		uint64_t offset, blkoff;
+
+		offset = i * sizeof (blkptr_t);
+		blkoff = P2PHASE(i, bpo->bpo_epb);
+
+		if (dbuf == NULL || dbuf->db_offset > offset) {
+			if (dbuf)
+				dmu_buf_rele(dbuf, FTAG);
+			err = dmu_buf_hold(bpo->bpo_os, bpo->bpo_object, offset,
+			    FTAG, &dbuf, 0);
+			if (err)
+				break;
+		}
+
+		ASSERT3U(offset, >=, dbuf->db_offset);
+		ASSERT3U(offset, <, dbuf->db_offset + dbuf->db_size);
+
+		bparray = dbuf->db_data;
+		bp = &bparray[blkoff];
+		err = func(arg, bp, tx);
+		if (err)
+			break;
+		if (free) {
+			bpo->bpo_phys->bpo_bytes -=
+			    bp_get_dsize_sync(dmu_objset_spa(bpo->bpo_os), bp);
+			ASSERT3S(bpo->bpo_phys->bpo_bytes, >=, 0);
+			if (bpo->bpo_havecomp) {
+				bpo->bpo_phys->bpo_comp -= BP_GET_PSIZE(bp);
+				bpo->bpo_phys->bpo_uncomp -= BP_GET_UCSIZE(bp);
+			}
+			bpo->bpo_phys->bpo_num_blkptrs--;
+			ASSERT3S(bpo->bpo_phys->bpo_num_blkptrs, >=, 0);
+		}
+	}
+	if (dbuf) {
+		dmu_buf_rele(dbuf, FTAG);
+		dbuf = NULL;
+	}
+	if (free) {
+		i++;
+		VERIFY3U(0, ==, dmu_free_range(bpo->bpo_os, bpo->bpo_object,
+		    i * sizeof (blkptr_t), -1ULL, tx));
+	}
+	if (err || !bpo->bpo_havesubobj || bpo->bpo_phys->bpo_subobjs == 0)
+		goto out;
+
+	ASSERT(bpo->bpo_havecomp);
+	err = dmu_object_info(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, &doi);
+	if (err) {
+		mutex_exit(&bpo->bpo_lock);
+		return (err);
+	}
+	epb = doi.doi_data_block_size / sizeof (uint64_t);
+
+	for (i = bpo->bpo_phys->bpo_num_subobjs - 1; i >= 0; i--) {
+		uint64_t *objarray;
+		uint64_t offset, blkoff;
+		bpobj_t sublist;
+		uint64_t used_before, comp_before, uncomp_before;
+		uint64_t used_after, comp_after, uncomp_after;
+
+		offset = i * sizeof (uint64_t);
+		blkoff = P2PHASE(i, epb);
+
+		if (dbuf == NULL || dbuf->db_offset > offset) {
+			if (dbuf)
+				dmu_buf_rele(dbuf, FTAG);
+			err = dmu_buf_hold(bpo->bpo_os,
+			    bpo->bpo_phys->bpo_subobjs, offset, FTAG, &dbuf, 0);
+			if (err)
+				break;
+		}
+
+		ASSERT3U(offset, >=, dbuf->db_offset);
+		ASSERT3U(offset, <, dbuf->db_offset + dbuf->db_size);
+
+		objarray = dbuf->db_data;
+		err = bpobj_open(&sublist, bpo->bpo_os, objarray[blkoff]);
+		if (err)
+			break;
+		if (free) {
+			err = bpobj_space(&sublist,
+			    &used_before, &comp_before, &uncomp_before);
+			if (err)
+				break;
+		}
+		err = bpobj_iterate_impl(&sublist, func, arg, tx, free);
+		if (free) {
+			VERIFY3U(0, ==, bpobj_space(&sublist,
+			    &used_after, &comp_after, &uncomp_after));
+			bpo->bpo_phys->bpo_bytes -= used_before - used_after;
+			ASSERT3S(bpo->bpo_phys->bpo_bytes, >=, 0);
+			bpo->bpo_phys->bpo_comp -= comp_before - comp_after;
+			bpo->bpo_phys->bpo_uncomp -=
+			    uncomp_before - uncomp_after;
+		}
+
+		bpobj_close(&sublist);
+		if (err)
+			break;
+		if (free) {
+			err = dmu_object_free(bpo->bpo_os,
+			    objarray[blkoff], tx);
+			if (err)
+				break;
+			bpo->bpo_phys->bpo_num_subobjs--;
+			ASSERT3S(bpo->bpo_phys->bpo_num_subobjs, >=, 0);
+		}
+	}
+	if (dbuf) {
+		dmu_buf_rele(dbuf, FTAG);
+		dbuf = NULL;
+	}
+	if (free) {
+		VERIFY3U(0, ==, dmu_free_range(bpo->bpo_os,
+		    bpo->bpo_phys->bpo_subobjs,
+		    (i + 1) * sizeof (uint64_t), -1ULL, tx));
+	}
+
+out:
+	/* If there are no entries, there should be no bytes. */
+	ASSERT(bpo->bpo_phys->bpo_num_blkptrs > 0 ||
+	    (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_num_subobjs > 0) ||
+	    bpo->bpo_phys->bpo_bytes == 0);
+
+	mutex_exit(&bpo->bpo_lock);
+	return (err);
+}
+
+/*
+ * Iterate and remove the entries.  If func returns nonzero, iteration
+ * will stop and that entry will not be removed.
+ */
+int
+bpobj_iterate(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx)
+{
+	return (bpobj_iterate_impl(bpo, func, arg, tx, B_TRUE));
+}
+
+/*
+ * Iterate the entries.  If func returns nonzero, iteration will stop.
+ */
+int
+bpobj_iterate_nofree(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx)
+{
+	return (bpobj_iterate_impl(bpo, func, arg, tx, B_FALSE));
+}
+
+void
+bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx)
+{
+	bpobj_t subbpo;
+	uint64_t used, comp, uncomp, subsubobjs;
+
+	ASSERT(bpo->bpo_havesubobj);
+	ASSERT(bpo->bpo_havecomp);
+
+	VERIFY3U(0, ==, bpobj_open(&subbpo, bpo->bpo_os, subobj));
+	VERIFY3U(0, ==, bpobj_space(&subbpo, &used, &comp, &uncomp));
+
+	if (used == 0) {
+		/* No point in having an empty subobj. */
+		bpobj_close(&subbpo);
+		bpobj_free(bpo->bpo_os, subobj, tx);
+		return;
+	}
+
+	dmu_buf_will_dirty(bpo->bpo_dbuf, tx);
+	if (bpo->bpo_phys->bpo_subobjs == 0) {
+		bpo->bpo_phys->bpo_subobjs = dmu_object_alloc(bpo->bpo_os,
+		    DMU_OT_BPOBJ_SUBOBJ, SPA_MAXBLOCKSIZE, DMU_OT_NONE, 0, tx);
+	}
+
+	mutex_enter(&bpo->bpo_lock);
+	dmu_write(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs,
+	    bpo->bpo_phys->bpo_num_subobjs * sizeof (subobj),
+	    sizeof (subobj), &subobj, tx);
+	bpo->bpo_phys->bpo_num_subobjs++;
+
+	/*
+	 * If subobj has only one block of subobjs, then move subobj's
+	 * subobjs to bpo's subobj list directly.  This reduces
+	 * recursion in bpobj_iterate due to nested subobjs.
+	 */
+	subsubobjs = subbpo.bpo_phys->bpo_subobjs;
+	if (subsubobjs != 0) {
+		dmu_object_info_t doi;
+
+		VERIFY3U(0, ==, dmu_object_info(bpo->bpo_os, subsubobjs, &doi));
+		if (doi.doi_max_offset == doi.doi_data_block_size) {
+			dmu_buf_t *subdb;
+			uint64_t numsubsub = subbpo.bpo_phys->bpo_num_subobjs;
+
+			VERIFY3U(0, ==, dmu_buf_hold(bpo->bpo_os, subsubobjs,
+			    0, FTAG, &subdb, 0));
+			dmu_write(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs,
+			    bpo->bpo_phys->bpo_num_subobjs * sizeof (subobj),
+			    numsubsub * sizeof (subobj), subdb->db_data, tx);
+			dmu_buf_rele(subdb, FTAG);
+			bpo->bpo_phys->bpo_num_subobjs += numsubsub;
+
+			dmu_buf_will_dirty(subbpo.bpo_dbuf, tx);
+			subbpo.bpo_phys->bpo_subobjs = 0;
+			VERIFY3U(0, ==, dmu_object_free(bpo->bpo_os,
+			    subsubobjs, tx));
+		}
+	}
+	bpo->bpo_phys->bpo_bytes += used;
+	bpo->bpo_phys->bpo_comp += comp;
+	bpo->bpo_phys->bpo_uncomp += uncomp;
+	mutex_exit(&bpo->bpo_lock);
+
+	bpobj_close(&subbpo);
+}
+
+void
+bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, dmu_tx_t *tx)
+{
+	blkptr_t stored_bp = *bp;
+	uint64_t offset;
+	int blkoff;
+	blkptr_t *bparray;
+
+	ASSERT(!BP_IS_HOLE(bp));
+
+	/* We never need the fill count. */
+	stored_bp.blk_fill = 0;
+
+	/* The bpobj will compress better if we can leave off the checksum */
+	if (!BP_GET_DEDUP(bp))
+		bzero(&stored_bp.blk_cksum, sizeof (stored_bp.blk_cksum));
+
+	mutex_enter(&bpo->bpo_lock);
+
+	offset = bpo->bpo_phys->bpo_num_blkptrs * sizeof (stored_bp);
+	blkoff = P2PHASE(bpo->bpo_phys->bpo_num_blkptrs, bpo->bpo_epb);
+
+	if (bpo->bpo_cached_dbuf == NULL ||
+	    offset < bpo->bpo_cached_dbuf->db_offset ||
+	    offset >= bpo->bpo_cached_dbuf->db_offset +
+	    bpo->bpo_cached_dbuf->db_size) {
+		if (bpo->bpo_cached_dbuf)
+			dmu_buf_rele(bpo->bpo_cached_dbuf, bpo);
+		VERIFY3U(0, ==, dmu_buf_hold(bpo->bpo_os, bpo->bpo_object,
+		    offset, bpo, &bpo->bpo_cached_dbuf, 0));
+	}
+
+	dmu_buf_will_dirty(bpo->bpo_cached_dbuf, tx);
+	bparray = bpo->bpo_cached_dbuf->db_data;
+	bparray[blkoff] = stored_bp;
+
+	dmu_buf_will_dirty(bpo->bpo_dbuf, tx);
+	bpo->bpo_phys->bpo_num_blkptrs++;
+	bpo->bpo_phys->bpo_bytes +=
+	    bp_get_dsize_sync(dmu_objset_spa(bpo->bpo_os), bp);
+	if (bpo->bpo_havecomp) {
+		bpo->bpo_phys->bpo_comp += BP_GET_PSIZE(bp);
+		bpo->bpo_phys->bpo_uncomp += BP_GET_UCSIZE(bp);
+	}
+	mutex_exit(&bpo->bpo_lock);
+}
+
+struct space_range_arg {
+	spa_t *spa;
+	uint64_t mintxg;
+	uint64_t maxtxg;
+	uint64_t used;
+	uint64_t comp;
+	uint64_t uncomp;
+};
+
+/* ARGSUSED */
+static int
+space_range_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
+{
+	struct space_range_arg *sra = arg;
+
+	if (bp->blk_birth > sra->mintxg && bp->blk_birth <= sra->maxtxg) {
+		sra->used += bp_get_dsize_sync(sra->spa, bp);
+		sra->comp += BP_GET_PSIZE(bp);
+		sra->uncomp += BP_GET_UCSIZE(bp);
+	}
+	return (0);
+}
+
+int
+bpobj_space(bpobj_t *bpo, uint64_t *usedp, uint64_t *compp, uint64_t *uncompp)
+{
+	mutex_enter(&bpo->bpo_lock);
+
+	*usedp = bpo->bpo_phys->bpo_bytes;
+	if (bpo->bpo_havecomp) {
+		*compp = bpo->bpo_phys->bpo_comp;
+		*uncompp = bpo->bpo_phys->bpo_uncomp;
+		mutex_exit(&bpo->bpo_lock);
+		return (0);
+	} else {
+		mutex_exit(&bpo->bpo_lock);
+		return (bpobj_space_range(bpo, 0, UINT64_MAX,
+		    usedp, compp, uncompp));
+	}
+}
+
+/*
+ * Return the amount of space in the bpobj which is:
+ * mintxg < blk_birth <= maxtxg
+ */
+int
+bpobj_space_range(bpobj_t *bpo, uint64_t mintxg, uint64_t maxtxg,
+    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp)
+{
+	struct space_range_arg sra = { 0 };
+	int err;
+
+	/*
+	 * As an optimization, if they want the whole txg range, just
+	 * get bpo_bytes rather than iterating over the bps.
+	 */
+	if (mintxg < TXG_INITIAL && maxtxg == UINT64_MAX && bpo->bpo_havecomp)
+		return (bpobj_space(bpo, usedp, compp, uncompp));
+
+	sra.spa = dmu_objset_spa(bpo->bpo_os);
+	sra.mintxg = mintxg;
+	sra.maxtxg = maxtxg;
+
+	err = bpobj_iterate_nofree(bpo, space_range_cb, &sra, NULL);
+	*usedp = sra.used;
+	*compp = sra.comp;
+	*uncompp = sra.uncomp;
+	return (err);
+}
diff --git a/uts/common/fs/zfs/dbuf.c b/uts/common/fs/zfs/dbuf.c
new file mode 100644
index 000000000000..9c4e0296db2b
--- /dev/null
+++ b/uts/common/fs/zfs/dbuf.c
@@ -0,0 +1,2707 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/dmu.h>
+#include <sys/dmu_impl.h>
+#include <sys/dbuf.h>
+#include <sys/dmu_objset.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_dir.h>
+#include <sys/dmu_tx.h>
+#include <sys/spa.h>
+#include <sys/zio.h>
+#include <sys/dmu_zfetch.h>
+#include <sys/sa.h>
+#include <sys/sa_impl.h>
+
+static void dbuf_destroy(dmu_buf_impl_t *db);
+static int dbuf_undirty(dmu_buf_impl_t *db, dmu_tx_t *tx);
+static void dbuf_write(dbuf_dirty_record_t *dr, arc_buf_t *data, dmu_tx_t *tx);
+
+/*
+ * Global data structures and functions for the dbuf cache.
+ */
+static kmem_cache_t *dbuf_cache;
+
+/* ARGSUSED */
+static int
+dbuf_cons(void *vdb, void *unused, int kmflag)
+{
+	dmu_buf_impl_t *db = vdb;
+	bzero(db, sizeof (dmu_buf_impl_t));
+
+	mutex_init(&db->db_mtx, NULL, MUTEX_DEFAULT, NULL);
+	cv_init(&db->db_changed, NULL, CV_DEFAULT, NULL);
+	refcount_create(&db->db_holds);
+	return (0);
+}
+
+/* ARGSUSED */
+static void
+dbuf_dest(void *vdb, void *unused)
+{
+	dmu_buf_impl_t *db = vdb;
+	mutex_destroy(&db->db_mtx);
+	cv_destroy(&db->db_changed);
+	refcount_destroy(&db->db_holds);
+}
+
+/*
+ * dbuf hash table routines
+ */
+static dbuf_hash_table_t dbuf_hash_table;
+
+static uint64_t dbuf_hash_count;
+
+static uint64_t
+dbuf_hash(void *os, uint64_t obj, uint8_t lvl, uint64_t blkid)
+{
+	uintptr_t osv = (uintptr_t)os;
+	uint64_t crc = -1ULL;
+
+	ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY);
+	crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (lvl)) & 0xFF];
+	crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (osv >> 6)) & 0xFF];
+	crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 0)) & 0xFF];
+	crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 8)) & 0xFF];
+	crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (blkid >> 0)) & 0xFF];
+	crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (blkid >> 8)) & 0xFF];
+
+	crc ^= (osv>>14) ^ (obj>>16) ^ (blkid>>16);
+
+	return (crc);
+}
+
+#define	DBUF_HASH(os, obj, level, blkid) dbuf_hash(os, obj, level, blkid);
+
+#define	DBUF_EQUAL(dbuf, os, obj, level, blkid)		\
+	((dbuf)->db.db_object == (obj) &&		\
+	(dbuf)->db_objset == (os) &&			\
+	(dbuf)->db_level == (level) &&			\
+	(dbuf)->db_blkid == (blkid))
+
+dmu_buf_impl_t *
+dbuf_find(dnode_t *dn, uint8_t level, uint64_t blkid)
+{
+	dbuf_hash_table_t *h = &dbuf_hash_table;
+	objset_t *os = dn->dn_objset;
+	uint64_t obj = dn->dn_object;
+	uint64_t hv = DBUF_HASH(os, obj, level, blkid);
+	uint64_t idx = hv & h->hash_table_mask;
+	dmu_buf_impl_t *db;
+
+	mutex_enter(DBUF_HASH_MUTEX(h, idx));
+	for (db = h->hash_table[idx]; db != NULL; db = db->db_hash_next) {
+		if (DBUF_EQUAL(db, os, obj, level, blkid)) {
+			mutex_enter(&db->db_mtx);
+			if (db->db_state != DB_EVICTING) {
+				mutex_exit(DBUF_HASH_MUTEX(h, idx));
+				return (db);
+			}
+			mutex_exit(&db->db_mtx);
+		}
+	}
+	mutex_exit(DBUF_HASH_MUTEX(h, idx));
+	return (NULL);
+}
+
+/*
+ * Insert an entry into the hash table.  If there is already an element
+ * equal to elem in the hash table, then the already existing element
+ * will be returned and the new element will not be inserted.
+ * Otherwise returns NULL.
+ */
+static dmu_buf_impl_t *
+dbuf_hash_insert(dmu_buf_impl_t *db)
+{
+	dbuf_hash_table_t *h = &dbuf_hash_table;
+	objset_t *os = db->db_objset;
+	uint64_t obj = db->db.db_object;
+	int level = db->db_level;
+	uint64_t blkid = db->db_blkid;
+	uint64_t hv = DBUF_HASH(os, obj, level, blkid);
+	uint64_t idx = hv & h->hash_table_mask;
+	dmu_buf_impl_t *dbf;
+
+	mutex_enter(DBUF_HASH_MUTEX(h, idx));
+	for (dbf = h->hash_table[idx]; dbf != NULL; dbf = dbf->db_hash_next) {
+		if (DBUF_EQUAL(dbf, os, obj, level, blkid)) {
+			mutex_enter(&dbf->db_mtx);
+			if (dbf->db_state != DB_EVICTING) {
+				mutex_exit(DBUF_HASH_MUTEX(h, idx));
+				return (dbf);
+			}
+			mutex_exit(&dbf->db_mtx);
+		}
+	}
+
+	mutex_enter(&db->db_mtx);
+	db->db_hash_next = h->hash_table[idx];
+	h->hash_table[idx] = db;
+	mutex_exit(DBUF_HASH_MUTEX(h, idx));
+	atomic_add_64(&dbuf_hash_count, 1);
+
+	return (NULL);
+}
+
+/*
+ * Remove an entry from the hash table.  This operation will
+ * fail if there are any existing holds on the db.
+ */
+static void
+dbuf_hash_remove(dmu_buf_impl_t *db)
+{
+	dbuf_hash_table_t *h = &dbuf_hash_table;
+	uint64_t hv = DBUF_HASH(db->db_objset, db->db.db_object,
+	    db->db_level, db->db_blkid);
+	uint64_t idx = hv & h->hash_table_mask;
+	dmu_buf_impl_t *dbf, **dbp;
+
+	/*
+	 * We musn't hold db_mtx to maintin lock ordering:
+	 * DBUF_HASH_MUTEX > db_mtx.
+	 */
+	ASSERT(refcount_is_zero(&db->db_holds));
+	ASSERT(db->db_state == DB_EVICTING);
+	ASSERT(!MUTEX_HELD(&db->db_mtx));
+
+	mutex_enter(DBUF_HASH_MUTEX(h, idx));
+	dbp = &h->hash_table[idx];
+	while ((dbf = *dbp) != db) {
+		dbp = &dbf->db_hash_next;
+		ASSERT(dbf != NULL);
+	}
+	*dbp = db->db_hash_next;
+	db->db_hash_next = NULL;
+	mutex_exit(DBUF_HASH_MUTEX(h, idx));
+	atomic_add_64(&dbuf_hash_count, -1);
+}
+
+static arc_evict_func_t dbuf_do_evict;
+
+static void
+dbuf_evict_user(dmu_buf_impl_t *db)
+{
+	ASSERT(MUTEX_HELD(&db->db_mtx));
+
+	if (db->db_level != 0 || db->db_evict_func == NULL)
+		return;
+
+	if (db->db_user_data_ptr_ptr)
+		*db->db_user_data_ptr_ptr = db->db.db_data;
+	db->db_evict_func(&db->db, db->db_user_ptr);
+	db->db_user_ptr = NULL;
+	db->db_user_data_ptr_ptr = NULL;
+	db->db_evict_func = NULL;
+}
+
+boolean_t
+dbuf_is_metadata(dmu_buf_impl_t *db)
+{
+	if (db->db_level > 0) {
+		return (B_TRUE);
+	} else {
+		boolean_t is_metadata;
+
+		DB_DNODE_ENTER(db);
+		is_metadata = dmu_ot[DB_DNODE(db)->dn_type].ot_metadata;
+		DB_DNODE_EXIT(db);
+
+		return (is_metadata);
+	}
+}
+
+void
+dbuf_evict(dmu_buf_impl_t *db)
+{
+	ASSERT(MUTEX_HELD(&db->db_mtx));
+	ASSERT(db->db_buf == NULL);
+	ASSERT(db->db_data_pending == NULL);
+
+	dbuf_clear(db);
+	dbuf_destroy(db);
+}
+
+void
+dbuf_init(void)
+{
+	uint64_t hsize = 1ULL << 16;
+	dbuf_hash_table_t *h = &dbuf_hash_table;
+	int i;
+
+	/*
+	 * The hash table is big enough to fill all of physical memory
+	 * with an average 4K block size.  The table will take up
+	 * totalmem*sizeof(void*)/4K (i.e. 2MB/GB with 8-byte pointers).
+	 */
+	while (hsize * 4096 < physmem * PAGESIZE)
+		hsize <<= 1;
+
+retry:
+	h->hash_table_mask = hsize - 1;
+	h->hash_table = kmem_zalloc(hsize * sizeof (void *), KM_NOSLEEP);
+	if (h->hash_table == NULL) {
+		/* XXX - we should really return an error instead of assert */
+		ASSERT(hsize > (1ULL << 10));
+		hsize >>= 1;
+		goto retry;
+	}
+
+	dbuf_cache = kmem_cache_create("dmu_buf_impl_t",
+	    sizeof (dmu_buf_impl_t),
+	    0, dbuf_cons, dbuf_dest, NULL, NULL, NULL, 0);
+
+	for (i = 0; i < DBUF_MUTEXES; i++)
+		mutex_init(&h->hash_mutexes[i], NULL, MUTEX_DEFAULT, NULL);
+}
+
+void
+dbuf_fini(void)
+{
+	dbuf_hash_table_t *h = &dbuf_hash_table;
+	int i;
+
+	for (i = 0; i < DBUF_MUTEXES; i++)
+		mutex_destroy(&h->hash_mutexes[i]);
+	kmem_free(h->hash_table, (h->hash_table_mask + 1) * sizeof (void *));
+	kmem_cache_destroy(dbuf_cache);
+}
+
+/*
+ * Other stuff.
+ */
+
+#ifdef ZFS_DEBUG
+static void
+dbuf_verify(dmu_buf_impl_t *db)
+{
+	dnode_t *dn;
+	dbuf_dirty_record_t *dr;
+
+	ASSERT(MUTEX_HELD(&db->db_mtx));
+
+	if (!(zfs_flags & ZFS_DEBUG_DBUF_VERIFY))
+		return;
+
+	ASSERT(db->db_objset != NULL);
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	if (dn == NULL) {
+		ASSERT(db->db_parent == NULL);
+		ASSERT(db->db_blkptr == NULL);
+	} else {
+		ASSERT3U(db->db.db_object, ==, dn->dn_object);
+		ASSERT3P(db->db_objset, ==, dn->dn_objset);
+		ASSERT3U(db->db_level, <, dn->dn_nlevels);
+		ASSERT(db->db_blkid == DMU_BONUS_BLKID ||
+		    db->db_blkid == DMU_SPILL_BLKID ||
+		    !list_is_empty(&dn->dn_dbufs));
+	}
+	if (db->db_blkid == DMU_BONUS_BLKID) {
+		ASSERT(dn != NULL);
+		ASSERT3U(db->db.db_size, >=, dn->dn_bonuslen);
+		ASSERT3U(db->db.db_offset, ==, DMU_BONUS_BLKID);
+	} else if (db->db_blkid == DMU_SPILL_BLKID) {
+		ASSERT(dn != NULL);
+		ASSERT3U(db->db.db_size, >=, dn->dn_bonuslen);
+		ASSERT3U(db->db.db_offset, ==, 0);
+	} else {
+		ASSERT3U(db->db.db_offset, ==, db->db_blkid * db->db.db_size);
+	}
+
+	for (dr = db->db_data_pending; dr != NULL; dr = dr->dr_next)
+		ASSERT(dr->dr_dbuf == db);
+
+	for (dr = db->db_last_dirty; dr != NULL; dr = dr->dr_next)
+		ASSERT(dr->dr_dbuf == db);
+
+	/*
+	 * We can't assert that db_size matches dn_datablksz because it
+	 * can be momentarily different when another thread is doing
+	 * dnode_set_blksz().
+	 */
+	if (db->db_level == 0 && db->db.db_object == DMU_META_DNODE_OBJECT) {
+		dr = db->db_data_pending;
+		/*
+		 * It should only be modified in syncing context, so
+		 * make sure we only have one copy of the data.
+		 */
+		ASSERT(dr == NULL || dr->dt.dl.dr_data == db->db_buf);
+	}
+
+	/* verify db->db_blkptr */
+	if (db->db_blkptr) {
+		if (db->db_parent == dn->dn_dbuf) {
+			/* db is pointed to by the dnode */
+			/* ASSERT3U(db->db_blkid, <, dn->dn_nblkptr); */
+			if (DMU_OBJECT_IS_SPECIAL(db->db.db_object))
+				ASSERT(db->db_parent == NULL);
+			else
+				ASSERT(db->db_parent != NULL);
+			if (db->db_blkid != DMU_SPILL_BLKID)
+				ASSERT3P(db->db_blkptr, ==,
+				    &dn->dn_phys->dn_blkptr[db->db_blkid]);
+		} else {
+			/* db is pointed to by an indirect block */
+			int epb = db->db_parent->db.db_size >> SPA_BLKPTRSHIFT;
+			ASSERT3U(db->db_parent->db_level, ==, db->db_level+1);
+			ASSERT3U(db->db_parent->db.db_object, ==,
+			    db->db.db_object);
+			/*
+			 * dnode_grow_indblksz() can make this fail if we don't
+			 * have the struct_rwlock.  XXX indblksz no longer
+			 * grows.  safe to do this now?
+			 */
+			if (RW_WRITE_HELD(&dn->dn_struct_rwlock)) {
+				ASSERT3P(db->db_blkptr, ==,
+				    ((blkptr_t *)db->db_parent->db.db_data +
+				    db->db_blkid % epb));
+			}
+		}
+	}
+	if ((db->db_blkptr == NULL || BP_IS_HOLE(db->db_blkptr)) &&
+	    (db->db_buf == NULL || db->db_buf->b_data) &&
+	    db->db.db_data && db->db_blkid != DMU_BONUS_BLKID &&
+	    db->db_state != DB_FILL && !dn->dn_free_txg) {
+		/*
+		 * If the blkptr isn't set but they have nonzero data,
+		 * it had better be dirty, otherwise we'll lose that
+		 * data when we evict this buffer.
+		 */
+		if (db->db_dirtycnt == 0) {
+			uint64_t *buf = db->db.db_data;
+			int i;
+
+			for (i = 0; i < db->db.db_size >> 3; i++) {
+				ASSERT(buf[i] == 0);
+			}
+		}
+	}
+	DB_DNODE_EXIT(db);
+}
+#endif
+
+static void
+dbuf_update_data(dmu_buf_impl_t *db)
+{
+	ASSERT(MUTEX_HELD(&db->db_mtx));
+	if (db->db_level == 0 && db->db_user_data_ptr_ptr) {
+		ASSERT(!refcount_is_zero(&db->db_holds));
+		*db->db_user_data_ptr_ptr = db->db.db_data;
+	}
+}
+
+static void
+dbuf_set_data(dmu_buf_impl_t *db, arc_buf_t *buf)
+{
+	ASSERT(MUTEX_HELD(&db->db_mtx));
+	ASSERT(db->db_buf == NULL || !arc_has_callback(db->db_buf));
+	db->db_buf = buf;
+	if (buf != NULL) {
+		ASSERT(buf->b_data != NULL);
+		db->db.db_data = buf->b_data;
+		if (!arc_released(buf))
+			arc_set_callback(buf, dbuf_do_evict, db);
+		dbuf_update_data(db);
+	} else {
+		dbuf_evict_user(db);
+		db->db.db_data = NULL;
+		if (db->db_state != DB_NOFILL)
+			db->db_state = DB_UNCACHED;
+	}
+}
+
+/*
+ * Loan out an arc_buf for read.  Return the loaned arc_buf.
+ */
+arc_buf_t *
+dbuf_loan_arcbuf(dmu_buf_impl_t *db)
+{
+	arc_buf_t *abuf;
+
+	mutex_enter(&db->db_mtx);
+	if (arc_released(db->db_buf) || refcount_count(&db->db_holds) > 1) {
+		int blksz = db->db.db_size;
+		spa_t *spa;
+
+		mutex_exit(&db->db_mtx);
+		DB_GET_SPA(&spa, db);
+		abuf = arc_loan_buf(spa, blksz);
+		bcopy(db->db.db_data, abuf->b_data, blksz);
+	} else {
+		abuf = db->db_buf;
+		arc_loan_inuse_buf(abuf, db);
+		dbuf_set_data(db, NULL);
+		mutex_exit(&db->db_mtx);
+	}
+	return (abuf);
+}
+
+uint64_t
+dbuf_whichblock(dnode_t *dn, uint64_t offset)
+{
+	if (dn->dn_datablkshift) {
+		return (offset >> dn->dn_datablkshift);
+	} else {
+		ASSERT3U(offset, <, dn->dn_datablksz);
+		return (0);
+	}
+}
+
+static void
+dbuf_read_done(zio_t *zio, arc_buf_t *buf, void *vdb)
+{
+	dmu_buf_impl_t *db = vdb;
+
+	mutex_enter(&db->db_mtx);
+	ASSERT3U(db->db_state, ==, DB_READ);
+	/*
+	 * All reads are synchronous, so we must have a hold on the dbuf
+	 */
+	ASSERT(refcount_count(&db->db_holds) > 0);
+	ASSERT(db->db_buf == NULL);
+	ASSERT(db->db.db_data == NULL);
+	if (db->db_level == 0 && db->db_freed_in_flight) {
+		/* we were freed in flight; disregard any error */
+		arc_release(buf, db);
+		bzero(buf->b_data, db->db.db_size);
+		arc_buf_freeze(buf);
+		db->db_freed_in_flight = FALSE;
+		dbuf_set_data(db, buf);
+		db->db_state = DB_CACHED;
+	} else if (zio == NULL || zio->io_error == 0) {
+		dbuf_set_data(db, buf);
+		db->db_state = DB_CACHED;
+	} else {
+		ASSERT(db->db_blkid != DMU_BONUS_BLKID);
+		ASSERT3P(db->db_buf, ==, NULL);
+		VERIFY(arc_buf_remove_ref(buf, db) == 1);
+		db->db_state = DB_UNCACHED;
+	}
+	cv_broadcast(&db->db_changed);
+	dbuf_rele_and_unlock(db, NULL);
+}
+
+static void
+dbuf_read_impl(dmu_buf_impl_t *db, zio_t *zio, uint32_t *flags)
+{
+	dnode_t *dn;
+	spa_t *spa;
+	zbookmark_t zb;
+	uint32_t aflags = ARC_NOWAIT;
+	arc_buf_t *pbuf;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	ASSERT(!refcount_is_zero(&db->db_holds));
+	/* We need the struct_rwlock to prevent db_blkptr from changing. */
+	ASSERT(RW_LOCK_HELD(&dn->dn_struct_rwlock));
+	ASSERT(MUTEX_HELD(&db->db_mtx));
+	ASSERT(db->db_state == DB_UNCACHED);
+	ASSERT(db->db_buf == NULL);
+
+	if (db->db_blkid == DMU_BONUS_BLKID) {
+		int bonuslen = MIN(dn->dn_bonuslen, dn->dn_phys->dn_bonuslen);
+
+		ASSERT3U(bonuslen, <=, db->db.db_size);
+		db->db.db_data = zio_buf_alloc(DN_MAX_BONUSLEN);
+		arc_space_consume(DN_MAX_BONUSLEN, ARC_SPACE_OTHER);
+		if (bonuslen < DN_MAX_BONUSLEN)
+			bzero(db->db.db_data, DN_MAX_BONUSLEN);
+		if (bonuslen)
+			bcopy(DN_BONUS(dn->dn_phys), db->db.db_data, bonuslen);
+		DB_DNODE_EXIT(db);
+		dbuf_update_data(db);
+		db->db_state = DB_CACHED;
+		mutex_exit(&db->db_mtx);
+		return;
+	}
+
+	/*
+	 * Recheck BP_IS_HOLE() after dnode_block_freed() in case dnode_sync()
+	 * processes the delete record and clears the bp while we are waiting
+	 * for the dn_mtx (resulting in a "no" from block_freed).
+	 */
+	if (db->db_blkptr == NULL || BP_IS_HOLE(db->db_blkptr) ||
+	    (db->db_level == 0 && (dnode_block_freed(dn, db->db_blkid) ||
+	    BP_IS_HOLE(db->db_blkptr)))) {
+		arc_buf_contents_t type = DBUF_GET_BUFC_TYPE(db);
+
+		dbuf_set_data(db, arc_buf_alloc(dn->dn_objset->os_spa,
+		    db->db.db_size, db, type));
+		DB_DNODE_EXIT(db);
+		bzero(db->db.db_data, db->db.db_size);
+		db->db_state = DB_CACHED;
+		*flags |= DB_RF_CACHED;
+		mutex_exit(&db->db_mtx);
+		return;
+	}
+
+	spa = dn->dn_objset->os_spa;
+	DB_DNODE_EXIT(db);
+
+	db->db_state = DB_READ;
+	mutex_exit(&db->db_mtx);
+
+	if (DBUF_IS_L2CACHEABLE(db))
+		aflags |= ARC_L2CACHE;
+
+	SET_BOOKMARK(&zb, db->db_objset->os_dsl_dataset ?
+	    db->db_objset->os_dsl_dataset->ds_object : DMU_META_OBJSET,
+	    db->db.db_object, db->db_level, db->db_blkid);
+
+	dbuf_add_ref(db, NULL);
+	/* ZIO_FLAG_CANFAIL callers have to check the parent zio's error */
+
+	if (db->db_parent)
+		pbuf = db->db_parent->db_buf;
+	else
+		pbuf = db->db_objset->os_phys_buf;
+
+	(void) dsl_read(zio, spa, db->db_blkptr, pbuf,
+	    dbuf_read_done, db, ZIO_PRIORITY_SYNC_READ,
+	    (*flags & DB_RF_CANFAIL) ? ZIO_FLAG_CANFAIL : ZIO_FLAG_MUSTSUCCEED,
+	    &aflags, &zb);
+	if (aflags & ARC_CACHED)
+		*flags |= DB_RF_CACHED;
+}
+
+int
+dbuf_read(dmu_buf_impl_t *db, zio_t *zio, uint32_t flags)
+{
+	int err = 0;
+	int havepzio = (zio != NULL);
+	int prefetch;
+	dnode_t *dn;
+
+	/*
+	 * We don't have to hold the mutex to check db_state because it
+	 * can't be freed while we have a hold on the buffer.
+	 */
+	ASSERT(!refcount_is_zero(&db->db_holds));
+
+	if (db->db_state == DB_NOFILL)
+		return (EIO);
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	if ((flags & DB_RF_HAVESTRUCT) == 0)
+		rw_enter(&dn->dn_struct_rwlock, RW_READER);
+
+	prefetch = db->db_level == 0 && db->db_blkid != DMU_BONUS_BLKID &&
+	    (flags & DB_RF_NOPREFETCH) == 0 && dn != NULL &&
+	    DBUF_IS_CACHEABLE(db);
+
+	mutex_enter(&db->db_mtx);
+	if (db->db_state == DB_CACHED) {
+		mutex_exit(&db->db_mtx);
+		if (prefetch)
+			dmu_zfetch(&dn->dn_zfetch, db->db.db_offset,
+			    db->db.db_size, TRUE);
+		if ((flags & DB_RF_HAVESTRUCT) == 0)
+			rw_exit(&dn->dn_struct_rwlock);
+		DB_DNODE_EXIT(db);
+	} else if (db->db_state == DB_UNCACHED) {
+		spa_t *spa = dn->dn_objset->os_spa;
+
+		if (zio == NULL)
+			zio = zio_root(spa, NULL, NULL, ZIO_FLAG_CANFAIL);
+		dbuf_read_impl(db, zio, &flags);
+
+		/* dbuf_read_impl has dropped db_mtx for us */
+
+		if (prefetch)
+			dmu_zfetch(&dn->dn_zfetch, db->db.db_offset,
+			    db->db.db_size, flags & DB_RF_CACHED);
+
+		if ((flags & DB_RF_HAVESTRUCT) == 0)
+			rw_exit(&dn->dn_struct_rwlock);
+		DB_DNODE_EXIT(db);
+
+		if (!havepzio)
+			err = zio_wait(zio);
+	} else {
+		mutex_exit(&db->db_mtx);
+		if (prefetch)
+			dmu_zfetch(&dn->dn_zfetch, db->db.db_offset,
+			    db->db.db_size, TRUE);
+		if ((flags & DB_RF_HAVESTRUCT) == 0)
+			rw_exit(&dn->dn_struct_rwlock);
+		DB_DNODE_EXIT(db);
+
+		mutex_enter(&db->db_mtx);
+		if ((flags & DB_RF_NEVERWAIT) == 0) {
+			while (db->db_state == DB_READ ||
+			    db->db_state == DB_FILL) {
+				ASSERT(db->db_state == DB_READ ||
+				    (flags & DB_RF_HAVESTRUCT) == 0);
+				cv_wait(&db->db_changed, &db->db_mtx);
+			}
+			if (db->db_state == DB_UNCACHED)
+				err = EIO;
+		}
+		mutex_exit(&db->db_mtx);
+	}
+
+	ASSERT(err || havepzio || db->db_state == DB_CACHED);
+	return (err);
+}
+
+static void
+dbuf_noread(dmu_buf_impl_t *db)
+{
+	ASSERT(!refcount_is_zero(&db->db_holds));
+	ASSERT(db->db_blkid != DMU_BONUS_BLKID);
+	mutex_enter(&db->db_mtx);
+	while (db->db_state == DB_READ || db->db_state == DB_FILL)
+		cv_wait(&db->db_changed, &db->db_mtx);
+	if (db->db_state == DB_UNCACHED) {
+		arc_buf_contents_t type = DBUF_GET_BUFC_TYPE(db);
+		spa_t *spa;
+
+		ASSERT(db->db_buf == NULL);
+		ASSERT(db->db.db_data == NULL);
+		DB_GET_SPA(&spa, db);
+		dbuf_set_data(db, arc_buf_alloc(spa, db->db.db_size, db, type));
+		db->db_state = DB_FILL;
+	} else if (db->db_state == DB_NOFILL) {
+		dbuf_set_data(db, NULL);
+	} else {
+		ASSERT3U(db->db_state, ==, DB_CACHED);
+	}
+	mutex_exit(&db->db_mtx);
+}
+
+/*
+ * This is our just-in-time copy function.  It makes a copy of
+ * buffers, that have been modified in a previous transaction
+ * group, before we modify them in the current active group.
+ *
+ * This function is used in two places: when we are dirtying a
+ * buffer for the first time in a txg, and when we are freeing
+ * a range in a dnode that includes this buffer.
+ *
+ * Note that when we are called from dbuf_free_range() we do
+ * not put a hold on the buffer, we just traverse the active
+ * dbuf list for the dnode.
+ */
+static void
+dbuf_fix_old_data(dmu_buf_impl_t *db, uint64_t txg)
+{
+	dbuf_dirty_record_t *dr = db->db_last_dirty;
+
+	ASSERT(MUTEX_HELD(&db->db_mtx));
+	ASSERT(db->db.db_data != NULL);
+	ASSERT(db->db_level == 0);
+	ASSERT(db->db.db_object != DMU_META_DNODE_OBJECT);
+
+	if (dr == NULL ||
+	    (dr->dt.dl.dr_data !=
+	    ((db->db_blkid  == DMU_BONUS_BLKID) ? db->db.db_data : db->db_buf)))
+		return;
+
+	/*
+	 * If the last dirty record for this dbuf has not yet synced
+	 * and its referencing the dbuf data, either:
+	 *	reset the reference to point to a new copy,
+	 * or (if there a no active holders)
+	 *	just null out the current db_data pointer.
+	 */
+	ASSERT(dr->dr_txg >= txg - 2);
+	if (db->db_blkid == DMU_BONUS_BLKID) {
+		/* Note that the data bufs here are zio_bufs */
+		dr->dt.dl.dr_data = zio_buf_alloc(DN_MAX_BONUSLEN);
+		arc_space_consume(DN_MAX_BONUSLEN, ARC_SPACE_OTHER);
+		bcopy(db->db.db_data, dr->dt.dl.dr_data, DN_MAX_BONUSLEN);
+	} else if (refcount_count(&db->db_holds) > db->db_dirtycnt) {
+		int size = db->db.db_size;
+		arc_buf_contents_t type = DBUF_GET_BUFC_TYPE(db);
+		spa_t *spa;
+
+		DB_GET_SPA(&spa, db);
+		dr->dt.dl.dr_data = arc_buf_alloc(spa, size, db, type);
+		bcopy(db->db.db_data, dr->dt.dl.dr_data->b_data, size);
+	} else {
+		dbuf_set_data(db, NULL);
+	}
+}
+
+void
+dbuf_unoverride(dbuf_dirty_record_t *dr)
+{
+	dmu_buf_impl_t *db = dr->dr_dbuf;
+	blkptr_t *bp = &dr->dt.dl.dr_overridden_by;
+	uint64_t txg = dr->dr_txg;
+
+	ASSERT(MUTEX_HELD(&db->db_mtx));
+	ASSERT(dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC);
+	ASSERT(db->db_level == 0);
+
+	if (db->db_blkid == DMU_BONUS_BLKID ||
+	    dr->dt.dl.dr_override_state == DR_NOT_OVERRIDDEN)
+		return;
+
+	ASSERT(db->db_data_pending != dr);
+
+	/* free this block */
+	if (!BP_IS_HOLE(bp)) {
+		spa_t *spa;
+
+		DB_GET_SPA(&spa, db);
+		zio_free(spa, txg, bp);
+	}
+	dr->dt.dl.dr_override_state = DR_NOT_OVERRIDDEN;
+	/*
+	 * Release the already-written buffer, so we leave it in
+	 * a consistent dirty state.  Note that all callers are
+	 * modifying the buffer, so they will immediately do
+	 * another (redundant) arc_release().  Therefore, leave
+	 * the buf thawed to save the effort of freezing &
+	 * immediately re-thawing it.
+	 */
+	arc_release(dr->dt.dl.dr_data, db);
+}
+
+/*
+ * Evict (if its unreferenced) or clear (if its referenced) any level-0
+ * data blocks in the free range, so that any future readers will find
+ * empty blocks.  Also, if we happen accross any level-1 dbufs in the
+ * range that have not already been marked dirty, mark them dirty so
+ * they stay in memory.
+ */
+void
+dbuf_free_range(dnode_t *dn, uint64_t start, uint64_t end, dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *db, *db_next;
+	uint64_t txg = tx->tx_txg;
+	int epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
+	uint64_t first_l1 = start >> epbs;
+	uint64_t last_l1 = end >> epbs;
+
+	if (end > dn->dn_maxblkid && (end != DMU_SPILL_BLKID)) {
+		end = dn->dn_maxblkid;
+		last_l1 = end >> epbs;
+	}
+	dprintf_dnode(dn, "start=%llu end=%llu\n", start, end);
+	mutex_enter(&dn->dn_dbufs_mtx);
+	for (db = list_head(&dn->dn_dbufs); db; db = db_next) {
+		db_next = list_next(&dn->dn_dbufs, db);
+		ASSERT(db->db_blkid != DMU_BONUS_BLKID);
+
+		if (db->db_level == 1 &&
+		    db->db_blkid >= first_l1 && db->db_blkid <= last_l1) {
+			mutex_enter(&db->db_mtx);
+			if (db->db_last_dirty &&
+			    db->db_last_dirty->dr_txg < txg) {
+				dbuf_add_ref(db, FTAG);
+				mutex_exit(&db->db_mtx);
+				dbuf_will_dirty(db, tx);
+				dbuf_rele(db, FTAG);
+			} else {
+				mutex_exit(&db->db_mtx);
+			}
+		}
+
+		if (db->db_level != 0)
+			continue;
+		dprintf_dbuf(db, "found buf %s\n", "");
+		if (db->db_blkid < start || db->db_blkid > end)
+			continue;
+
+		/* found a level 0 buffer in the range */
+		if (dbuf_undirty(db, tx))
+			continue;
+
+		mutex_enter(&db->db_mtx);
+		if (db->db_state == DB_UNCACHED ||
+		    db->db_state == DB_NOFILL ||
+		    db->db_state == DB_EVICTING) {
+			ASSERT(db->db.db_data == NULL);
+			mutex_exit(&db->db_mtx);
+			continue;
+		}
+		if (db->db_state == DB_READ || db->db_state == DB_FILL) {
+			/* will be handled in dbuf_read_done or dbuf_rele */
+			db->db_freed_in_flight = TRUE;
+			mutex_exit(&db->db_mtx);
+			continue;
+		}
+		if (refcount_count(&db->db_holds) == 0) {
+			ASSERT(db->db_buf);
+			dbuf_clear(db);
+			continue;
+		}
+		/* The dbuf is referenced */
+
+		if (db->db_last_dirty != NULL) {
+			dbuf_dirty_record_t *dr = db->db_last_dirty;
+
+			if (dr->dr_txg == txg) {
+				/*
+				 * This buffer is "in-use", re-adjust the file
+				 * size to reflect that this buffer may
+				 * contain new data when we sync.
+				 */
+				if (db->db_blkid != DMU_SPILL_BLKID &&
+				    db->db_blkid > dn->dn_maxblkid)
+					dn->dn_maxblkid = db->db_blkid;
+				dbuf_unoverride(dr);
+			} else {
+				/*
+				 * This dbuf is not dirty in the open context.
+				 * Either uncache it (if its not referenced in
+				 * the open context) or reset its contents to
+				 * empty.
+				 */
+				dbuf_fix_old_data(db, txg);
+			}
+		}
+		/* clear the contents if its cached */
+		if (db->db_state == DB_CACHED) {
+			ASSERT(db->db.db_data != NULL);
+			arc_release(db->db_buf, db);
+			bzero(db->db.db_data, db->db.db_size);
+			arc_buf_freeze(db->db_buf);
+		}
+
+		mutex_exit(&db->db_mtx);
+	}
+	mutex_exit(&dn->dn_dbufs_mtx);
+}
+
+static int
+dbuf_block_freeable(dmu_buf_impl_t *db)
+{
+	dsl_dataset_t *ds = db->db_objset->os_dsl_dataset;
+	uint64_t birth_txg = 0;
+
+	/*
+	 * We don't need any locking to protect db_blkptr:
+	 * If it's syncing, then db_last_dirty will be set
+	 * so we'll ignore db_blkptr.
+	 */
+	ASSERT(MUTEX_HELD(&db->db_mtx));
+	if (db->db_last_dirty)
+		birth_txg = db->db_last_dirty->dr_txg;
+	else if (db->db_blkptr)
+		birth_txg = db->db_blkptr->blk_birth;
+
+	/*
+	 * If we don't exist or are in a snapshot, we can't be freed.
+	 * Don't pass the bp to dsl_dataset_block_freeable() since we
+	 * are holding the db_mtx lock and might deadlock if we are
+	 * prefetching a dedup-ed block.
+	 */
+	if (birth_txg)
+		return (ds == NULL ||
+		    dsl_dataset_block_freeable(ds, NULL, birth_txg));
+	else
+		return (FALSE);
+}
+
+void
+dbuf_new_size(dmu_buf_impl_t *db, int size, dmu_tx_t *tx)
+{
+	arc_buf_t *buf, *obuf;
+	int osize = db->db.db_size;
+	arc_buf_contents_t type = DBUF_GET_BUFC_TYPE(db);
+	dnode_t *dn;
+
+	ASSERT(db->db_blkid != DMU_BONUS_BLKID);
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+
+	/* XXX does *this* func really need the lock? */
+	ASSERT(RW_WRITE_HELD(&dn->dn_struct_rwlock));
+
+	/*
+	 * This call to dbuf_will_dirty() with the dn_struct_rwlock held
+	 * is OK, because there can be no other references to the db
+	 * when we are changing its size, so no concurrent DB_FILL can
+	 * be happening.
+	 */
+	/*
+	 * XXX we should be doing a dbuf_read, checking the return
+	 * value and returning that up to our callers
+	 */
+	dbuf_will_dirty(db, tx);
+
+	/* create the data buffer for the new block */
+	buf = arc_buf_alloc(dn->dn_objset->os_spa, size, db, type);
+
+	/* copy old block data to the new block */
+	obuf = db->db_buf;
+	bcopy(obuf->b_data, buf->b_data, MIN(osize, size));
+	/* zero the remainder */
+	if (size > osize)
+		bzero((uint8_t *)buf->b_data + osize, size - osize);
+
+	mutex_enter(&db->db_mtx);
+	dbuf_set_data(db, buf);
+	VERIFY(arc_buf_remove_ref(obuf, db) == 1);
+	db->db.db_size = size;
+
+	if (db->db_level == 0) {
+		ASSERT3U(db->db_last_dirty->dr_txg, ==, tx->tx_txg);
+		db->db_last_dirty->dt.dl.dr_data = buf;
+	}
+	mutex_exit(&db->db_mtx);
+
+	dnode_willuse_space(dn, size-osize, tx);
+	DB_DNODE_EXIT(db);
+}
+
+void
+dbuf_release_bp(dmu_buf_impl_t *db)
+{
+	objset_t *os;
+	zbookmark_t zb;
+
+	DB_GET_OBJSET(&os, db);
+	ASSERT(dsl_pool_sync_context(dmu_objset_pool(os)));
+	ASSERT(arc_released(os->os_phys_buf) ||
+	    list_link_active(&os->os_dsl_dataset->ds_synced_link));
+	ASSERT(db->db_parent == NULL || arc_released(db->db_parent->db_buf));
+
+	zb.zb_objset = os->os_dsl_dataset ?
+	    os->os_dsl_dataset->ds_object : 0;
+	zb.zb_object = db->db.db_object;
+	zb.zb_level = db->db_level;
+	zb.zb_blkid = db->db_blkid;
+	(void) arc_release_bp(db->db_buf, db,
+	    db->db_blkptr, os->os_spa, &zb);
+}
+
+dbuf_dirty_record_t *
+dbuf_dirty(dmu_buf_impl_t *db, dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	objset_t *os;
+	dbuf_dirty_record_t **drp, *dr;
+	int drop_struct_lock = FALSE;
+	boolean_t do_free_accounting = B_FALSE;
+	int txgoff = tx->tx_txg & TXG_MASK;
+
+	ASSERT(tx->tx_txg != 0);
+	ASSERT(!refcount_is_zero(&db->db_holds));
+	DMU_TX_DIRTY_BUF(tx, db);
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	/*
+	 * Shouldn't dirty a regular buffer in syncing context.  Private
+	 * objects may be dirtied in syncing context, but only if they
+	 * were already pre-dirtied in open context.
+	 */
+	ASSERT(!dmu_tx_is_syncing(tx) ||
+	    BP_IS_HOLE(dn->dn_objset->os_rootbp) ||
+	    DMU_OBJECT_IS_SPECIAL(dn->dn_object) ||
+	    dn->dn_objset->os_dsl_dataset == NULL);
+	/*
+	 * We make this assert for private objects as well, but after we
+	 * check if we're already dirty.  They are allowed to re-dirty
+	 * in syncing context.
+	 */
+	ASSERT(dn->dn_object == DMU_META_DNODE_OBJECT ||
+	    dn->dn_dirtyctx == DN_UNDIRTIED || dn->dn_dirtyctx ==
+	    (dmu_tx_is_syncing(tx) ? DN_DIRTY_SYNC : DN_DIRTY_OPEN));
+
+	mutex_enter(&db->db_mtx);
+	/*
+	 * XXX make this true for indirects too?  The problem is that
+	 * transactions created with dmu_tx_create_assigned() from
+	 * syncing context don't bother holding ahead.
+	 */
+	ASSERT(db->db_level != 0 ||
+	    db->db_state == DB_CACHED || db->db_state == DB_FILL ||
+	    db->db_state == DB_NOFILL);
+
+	mutex_enter(&dn->dn_mtx);
+	/*
+	 * Don't set dirtyctx to SYNC if we're just modifying this as we
+	 * initialize the objset.
+	 */
+	if (dn->dn_dirtyctx == DN_UNDIRTIED &&
+	    !BP_IS_HOLE(dn->dn_objset->os_rootbp)) {
+		dn->dn_dirtyctx =
+		    (dmu_tx_is_syncing(tx) ? DN_DIRTY_SYNC : DN_DIRTY_OPEN);
+		ASSERT(dn->dn_dirtyctx_firstset == NULL);
+		dn->dn_dirtyctx_firstset = kmem_alloc(1, KM_SLEEP);
+	}
+	mutex_exit(&dn->dn_mtx);
+
+	if (db->db_blkid == DMU_SPILL_BLKID)
+		dn->dn_have_spill = B_TRUE;
+
+	/*
+	 * If this buffer is already dirty, we're done.
+	 */
+	drp = &db->db_last_dirty;
+	ASSERT(*drp == NULL || (*drp)->dr_txg <= tx->tx_txg ||
+	    db->db.db_object == DMU_META_DNODE_OBJECT);
+	while ((dr = *drp) != NULL && dr->dr_txg > tx->tx_txg)
+		drp = &dr->dr_next;
+	if (dr && dr->dr_txg == tx->tx_txg) {
+		DB_DNODE_EXIT(db);
+
+		if (db->db_level == 0 && db->db_blkid != DMU_BONUS_BLKID) {
+			/*
+			 * If this buffer has already been written out,
+			 * we now need to reset its state.
+			 */
+			dbuf_unoverride(dr);
+			if (db->db.db_object != DMU_META_DNODE_OBJECT &&
+			    db->db_state != DB_NOFILL)
+				arc_buf_thaw(db->db_buf);
+		}
+		mutex_exit(&db->db_mtx);
+		return (dr);
+	}
+
+	/*
+	 * Only valid if not already dirty.
+	 */
+	ASSERT(dn->dn_object == 0 ||
+	    dn->dn_dirtyctx == DN_UNDIRTIED || dn->dn_dirtyctx ==
+	    (dmu_tx_is_syncing(tx) ? DN_DIRTY_SYNC : DN_DIRTY_OPEN));
+
+	ASSERT3U(dn->dn_nlevels, >, db->db_level);
+	ASSERT((dn->dn_phys->dn_nlevels == 0 && db->db_level == 0) ||
+	    dn->dn_phys->dn_nlevels > db->db_level ||
+	    dn->dn_next_nlevels[txgoff] > db->db_level ||
+	    dn->dn_next_nlevels[(tx->tx_txg-1) & TXG_MASK] > db->db_level ||
+	    dn->dn_next_nlevels[(tx->tx_txg-2) & TXG_MASK] > db->db_level);
+
+	/*
+	 * We should only be dirtying in syncing context if it's the
+	 * mos or we're initializing the os or it's a special object.
+	 * However, we are allowed to dirty in syncing context provided
+	 * we already dirtied it in open context.  Hence we must make
+	 * this assertion only if we're not already dirty.
+	 */
+	os = dn->dn_objset;
+	ASSERT(!dmu_tx_is_syncing(tx) || DMU_OBJECT_IS_SPECIAL(dn->dn_object) ||
+	    os->os_dsl_dataset == NULL || BP_IS_HOLE(os->os_rootbp));
+	ASSERT(db->db.db_size != 0);
+
+	dprintf_dbuf(db, "size=%llx\n", (u_longlong_t)db->db.db_size);
+
+	if (db->db_blkid != DMU_BONUS_BLKID) {
+		/*
+		 * Update the accounting.
+		 * Note: we delay "free accounting" until after we drop
+		 * the db_mtx.  This keeps us from grabbing other locks
+		 * (and possibly deadlocking) in bp_get_dsize() while
+		 * also holding the db_mtx.
+		 */
+		dnode_willuse_space(dn, db->db.db_size, tx);
+		do_free_accounting = dbuf_block_freeable(db);
+	}
+
+	/*
+	 * If this buffer is dirty in an old transaction group we need
+	 * to make a copy of it so that the changes we make in this
+	 * transaction group won't leak out when we sync the older txg.
+	 */
+	dr = kmem_zalloc(sizeof (dbuf_dirty_record_t), KM_SLEEP);
+	if (db->db_level == 0) {
+		void *data_old = db->db_buf;
+
+		if (db->db_state != DB_NOFILL) {
+			if (db->db_blkid == DMU_BONUS_BLKID) {
+				dbuf_fix_old_data(db, tx->tx_txg);
+				data_old = db->db.db_data;
+			} else if (db->db.db_object != DMU_META_DNODE_OBJECT) {
+				/*
+				 * Release the data buffer from the cache so
+				 * that we can modify it without impacting
+				 * possible other users of this cached data
+				 * block.  Note that indirect blocks and
+				 * private objects are not released until the
+				 * syncing state (since they are only modified
+				 * then).
+				 */
+				arc_release(db->db_buf, db);
+				dbuf_fix_old_data(db, tx->tx_txg);
+				data_old = db->db_buf;
+			}
+			ASSERT(data_old != NULL);
+		}
+		dr->dt.dl.dr_data = data_old;
+	} else {
+		mutex_init(&dr->dt.di.dr_mtx, NULL, MUTEX_DEFAULT, NULL);
+		list_create(&dr->dt.di.dr_children,
+		    sizeof (dbuf_dirty_record_t),
+		    offsetof(dbuf_dirty_record_t, dr_dirty_node));
+	}
+	dr->dr_dbuf = db;
+	dr->dr_txg = tx->tx_txg;
+	dr->dr_next = *drp;
+	*drp = dr;
+
+	/*
+	 * We could have been freed_in_flight between the dbuf_noread
+	 * and dbuf_dirty.  We win, as though the dbuf_noread() had
+	 * happened after the free.
+	 */
+	if (db->db_level == 0 && db->db_blkid != DMU_BONUS_BLKID &&
+	    db->db_blkid != DMU_SPILL_BLKID) {
+		mutex_enter(&dn->dn_mtx);
+		dnode_clear_range(dn, db->db_blkid, 1, tx);
+		mutex_exit(&dn->dn_mtx);
+		db->db_freed_in_flight = FALSE;
+	}
+
+	/*
+	 * This buffer is now part of this txg
+	 */
+	dbuf_add_ref(db, (void *)(uintptr_t)tx->tx_txg);
+	db->db_dirtycnt += 1;
+	ASSERT3U(db->db_dirtycnt, <=, 3);
+
+	mutex_exit(&db->db_mtx);
+
+	if (db->db_blkid == DMU_BONUS_BLKID ||
+	    db->db_blkid == DMU_SPILL_BLKID) {
+		mutex_enter(&dn->dn_mtx);
+		ASSERT(!list_link_active(&dr->dr_dirty_node));
+		list_insert_tail(&dn->dn_dirty_records[txgoff], dr);
+		mutex_exit(&dn->dn_mtx);
+		dnode_setdirty(dn, tx);
+		DB_DNODE_EXIT(db);
+		return (dr);
+	} else if (do_free_accounting) {
+		blkptr_t *bp = db->db_blkptr;
+		int64_t willfree = (bp && !BP_IS_HOLE(bp)) ?
+		    bp_get_dsize(os->os_spa, bp) : db->db.db_size;
+		/*
+		 * This is only a guess -- if the dbuf is dirty
+		 * in a previous txg, we don't know how much
+		 * space it will use on disk yet.  We should
+		 * really have the struct_rwlock to access
+		 * db_blkptr, but since this is just a guess,
+		 * it's OK if we get an odd answer.
+		 */
+		ddt_prefetch(os->os_spa, bp);
+		dnode_willuse_space(dn, -willfree, tx);
+	}
+
+	if (!RW_WRITE_HELD(&dn->dn_struct_rwlock)) {
+		rw_enter(&dn->dn_struct_rwlock, RW_READER);
+		drop_struct_lock = TRUE;
+	}
+
+	if (db->db_level == 0) {
+		dnode_new_blkid(dn, db->db_blkid, tx, drop_struct_lock);
+		ASSERT(dn->dn_maxblkid >= db->db_blkid);
+	}
+
+	if (db->db_level+1 < dn->dn_nlevels) {
+		dmu_buf_impl_t *parent = db->db_parent;
+		dbuf_dirty_record_t *di;
+		int parent_held = FALSE;
+
+		if (db->db_parent == NULL || db->db_parent == dn->dn_dbuf) {
+			int epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
+
+			parent = dbuf_hold_level(dn, db->db_level+1,
+			    db->db_blkid >> epbs, FTAG);
+			ASSERT(parent != NULL);
+			parent_held = TRUE;
+		}
+		if (drop_struct_lock)
+			rw_exit(&dn->dn_struct_rwlock);
+		ASSERT3U(db->db_level+1, ==, parent->db_level);
+		di = dbuf_dirty(parent, tx);
+		if (parent_held)
+			dbuf_rele(parent, FTAG);
+
+		mutex_enter(&db->db_mtx);
+		/*  possible race with dbuf_undirty() */
+		if (db->db_last_dirty == dr ||
+		    dn->dn_object == DMU_META_DNODE_OBJECT) {
+			mutex_enter(&di->dt.di.dr_mtx);
+			ASSERT3U(di->dr_txg, ==, tx->tx_txg);
+			ASSERT(!list_link_active(&dr->dr_dirty_node));
+			list_insert_tail(&di->dt.di.dr_children, dr);
+			mutex_exit(&di->dt.di.dr_mtx);
+			dr->dr_parent = di;
+		}
+		mutex_exit(&db->db_mtx);
+	} else {
+		ASSERT(db->db_level+1 == dn->dn_nlevels);
+		ASSERT(db->db_blkid < dn->dn_nblkptr);
+		ASSERT(db->db_parent == NULL || db->db_parent == dn->dn_dbuf);
+		mutex_enter(&dn->dn_mtx);
+		ASSERT(!list_link_active(&dr->dr_dirty_node));
+		list_insert_tail(&dn->dn_dirty_records[txgoff], dr);
+		mutex_exit(&dn->dn_mtx);
+		if (drop_struct_lock)
+			rw_exit(&dn->dn_struct_rwlock);
+	}
+
+	dnode_setdirty(dn, tx);
+	DB_DNODE_EXIT(db);
+	return (dr);
+}
+
+static int
+dbuf_undirty(dmu_buf_impl_t *db, dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	uint64_t txg = tx->tx_txg;
+	dbuf_dirty_record_t *dr, **drp;
+
+	ASSERT(txg != 0);
+	ASSERT(db->db_blkid != DMU_BONUS_BLKID);
+
+	mutex_enter(&db->db_mtx);
+	/*
+	 * If this buffer is not dirty, we're done.
+	 */
+	for (drp = &db->db_last_dirty; (dr = *drp) != NULL; drp = &dr->dr_next)
+		if (dr->dr_txg <= txg)
+			break;
+	if (dr == NULL || dr->dr_txg < txg) {
+		mutex_exit(&db->db_mtx);
+		return (0);
+	}
+	ASSERT(dr->dr_txg == txg);
+	ASSERT(dr->dr_dbuf == db);
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+
+	/*
+	 * If this buffer is currently held, we cannot undirty
+	 * it, since one of the current holders may be in the
+	 * middle of an update.  Note that users of dbuf_undirty()
+	 * should not place a hold on the dbuf before the call.
+	 */
+	if (refcount_count(&db->db_holds) > db->db_dirtycnt) {
+		mutex_exit(&db->db_mtx);
+		/* Make sure we don't toss this buffer at sync phase */
+		mutex_enter(&dn->dn_mtx);
+		dnode_clear_range(dn, db->db_blkid, 1, tx);
+		mutex_exit(&dn->dn_mtx);
+		DB_DNODE_EXIT(db);
+		return (0);
+	}
+
+	dprintf_dbuf(db, "size=%llx\n", (u_longlong_t)db->db.db_size);
+
+	ASSERT(db->db.db_size != 0);
+
+	/* XXX would be nice to fix up dn_towrite_space[] */
+
+	*drp = dr->dr_next;
+
+	if (dr->dr_parent) {
+		mutex_enter(&dr->dr_parent->dt.di.dr_mtx);
+		list_remove(&dr->dr_parent->dt.di.dr_children, dr);
+		mutex_exit(&dr->dr_parent->dt.di.dr_mtx);
+	} else if (db->db_level+1 == dn->dn_nlevels) {
+		ASSERT(db->db_blkptr == NULL || db->db_parent == dn->dn_dbuf);
+		mutex_enter(&dn->dn_mtx);
+		list_remove(&dn->dn_dirty_records[txg & TXG_MASK], dr);
+		mutex_exit(&dn->dn_mtx);
+	}
+	DB_DNODE_EXIT(db);
+
+	if (db->db_level == 0) {
+		if (db->db_state != DB_NOFILL) {
+			dbuf_unoverride(dr);
+
+			ASSERT(db->db_buf != NULL);
+			ASSERT(dr->dt.dl.dr_data != NULL);
+			if (dr->dt.dl.dr_data != db->db_buf)
+				VERIFY(arc_buf_remove_ref(dr->dt.dl.dr_data,
+				    db) == 1);
+		}
+	} else {
+		ASSERT(db->db_buf != NULL);
+		ASSERT(list_head(&dr->dt.di.dr_children) == NULL);
+		mutex_destroy(&dr->dt.di.dr_mtx);
+		list_destroy(&dr->dt.di.dr_children);
+	}
+	kmem_free(dr, sizeof (dbuf_dirty_record_t));
+
+	ASSERT(db->db_dirtycnt > 0);
+	db->db_dirtycnt -= 1;
+
+	if (refcount_remove(&db->db_holds, (void *)(uintptr_t)txg) == 0) {
+		arc_buf_t *buf = db->db_buf;
+
+		ASSERT(db->db_state == DB_NOFILL || arc_released(buf));
+		dbuf_set_data(db, NULL);
+		VERIFY(arc_buf_remove_ref(buf, db) == 1);
+		dbuf_evict(db);
+		return (1);
+	}
+
+	mutex_exit(&db->db_mtx);
+	return (0);
+}
+
+#pragma weak dmu_buf_will_dirty = dbuf_will_dirty
+void
+dbuf_will_dirty(dmu_buf_impl_t *db, dmu_tx_t *tx)
+{
+	int rf = DB_RF_MUST_SUCCEED | DB_RF_NOPREFETCH;
+
+	ASSERT(tx->tx_txg != 0);
+	ASSERT(!refcount_is_zero(&db->db_holds));
+
+	DB_DNODE_ENTER(db);
+	if (RW_WRITE_HELD(&DB_DNODE(db)->dn_struct_rwlock))
+		rf |= DB_RF_HAVESTRUCT;
+	DB_DNODE_EXIT(db);
+	(void) dbuf_read(db, NULL, rf);
+	(void) dbuf_dirty(db, tx);
+}
+
+void
+dmu_buf_will_not_fill(dmu_buf_t *db_fake, dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
+
+	db->db_state = DB_NOFILL;
+
+	dmu_buf_will_fill(db_fake, tx);
+}
+
+void
+dmu_buf_will_fill(dmu_buf_t *db_fake, dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
+
+	ASSERT(db->db_blkid != DMU_BONUS_BLKID);
+	ASSERT(tx->tx_txg != 0);
+	ASSERT(db->db_level == 0);
+	ASSERT(!refcount_is_zero(&db->db_holds));
+
+	ASSERT(db->db.db_object != DMU_META_DNODE_OBJECT ||
+	    dmu_tx_private_ok(tx));
+
+	dbuf_noread(db);
+	(void) dbuf_dirty(db, tx);
+}
+
+#pragma weak dmu_buf_fill_done = dbuf_fill_done
+/* ARGSUSED */
+void
+dbuf_fill_done(dmu_buf_impl_t *db, dmu_tx_t *tx)
+{
+	mutex_enter(&db->db_mtx);
+	DBUF_VERIFY(db);
+
+	if (db->db_state == DB_FILL) {
+		if (db->db_level == 0 && db->db_freed_in_flight) {
+			ASSERT(db->db_blkid != DMU_BONUS_BLKID);
+			/* we were freed while filling */
+			/* XXX dbuf_undirty? */
+			bzero(db->db.db_data, db->db.db_size);
+			db->db_freed_in_flight = FALSE;
+		}
+		db->db_state = DB_CACHED;
+		cv_broadcast(&db->db_changed);
+	}
+	mutex_exit(&db->db_mtx);
+}
+
+/*
+ * Directly assign a provided arc buf to a given dbuf if it's not referenced
+ * by anybody except our caller. Otherwise copy arcbuf's contents to dbuf.
+ */
+void
+dbuf_assign_arcbuf(dmu_buf_impl_t *db, arc_buf_t *buf, dmu_tx_t *tx)
+{
+	ASSERT(!refcount_is_zero(&db->db_holds));
+	ASSERT(db->db_blkid != DMU_BONUS_BLKID);
+	ASSERT(db->db_level == 0);
+	ASSERT(DBUF_GET_BUFC_TYPE(db) == ARC_BUFC_DATA);
+	ASSERT(buf != NULL);
+	ASSERT(arc_buf_size(buf) == db->db.db_size);
+	ASSERT(tx->tx_txg != 0);
+
+	arc_return_buf(buf, db);
+	ASSERT(arc_released(buf));
+
+	mutex_enter(&db->db_mtx);
+
+	while (db->db_state == DB_READ || db->db_state == DB_FILL)
+		cv_wait(&db->db_changed, &db->db_mtx);
+
+	ASSERT(db->db_state == DB_CACHED || db->db_state == DB_UNCACHED);
+
+	if (db->db_state == DB_CACHED &&
+	    refcount_count(&db->db_holds) - 1 > db->db_dirtycnt) {
+		mutex_exit(&db->db_mtx);
+		(void) dbuf_dirty(db, tx);
+		bcopy(buf->b_data, db->db.db_data, db->db.db_size);
+		VERIFY(arc_buf_remove_ref(buf, db) == 1);
+		xuio_stat_wbuf_copied();
+		return;
+	}
+
+	xuio_stat_wbuf_nocopy();
+	if (db->db_state == DB_CACHED) {
+		dbuf_dirty_record_t *dr = db->db_last_dirty;
+
+		ASSERT(db->db_buf != NULL);
+		if (dr != NULL && dr->dr_txg == tx->tx_txg) {
+			ASSERT(dr->dt.dl.dr_data == db->db_buf);
+			if (!arc_released(db->db_buf)) {
+				ASSERT(dr->dt.dl.dr_override_state ==
+				    DR_OVERRIDDEN);
+				arc_release(db->db_buf, db);
+			}
+			dr->dt.dl.dr_data = buf;
+			VERIFY(arc_buf_remove_ref(db->db_buf, db) == 1);
+		} else if (dr == NULL || dr->dt.dl.dr_data != db->db_buf) {
+			arc_release(db->db_buf, db);
+			VERIFY(arc_buf_remove_ref(db->db_buf, db) == 1);
+		}
+		db->db_buf = NULL;
+	}
+	ASSERT(db->db_buf == NULL);
+	dbuf_set_data(db, buf);
+	db->db_state = DB_FILL;
+	mutex_exit(&db->db_mtx);
+	(void) dbuf_dirty(db, tx);
+	dbuf_fill_done(db, tx);
+}
+
+/*
+ * "Clear" the contents of this dbuf.  This will mark the dbuf
+ * EVICTING and clear *most* of its references.  Unfortunetely,
+ * when we are not holding the dn_dbufs_mtx, we can't clear the
+ * entry in the dn_dbufs list.  We have to wait until dbuf_destroy()
+ * in this case.  For callers from the DMU we will usually see:
+ *	dbuf_clear()->arc_buf_evict()->dbuf_do_evict()->dbuf_destroy()
+ * For the arc callback, we will usually see:
+ *	dbuf_do_evict()->dbuf_clear();dbuf_destroy()
+ * Sometimes, though, we will get a mix of these two:
+ *	DMU: dbuf_clear()->arc_buf_evict()
+ *	ARC: dbuf_do_evict()->dbuf_destroy()
+ */
+void
+dbuf_clear(dmu_buf_impl_t *db)
+{
+	dnode_t *dn;
+	dmu_buf_impl_t *parent = db->db_parent;
+	dmu_buf_impl_t *dndb;
+	int dbuf_gone = FALSE;
+
+	ASSERT(MUTEX_HELD(&db->db_mtx));
+	ASSERT(refcount_is_zero(&db->db_holds));
+
+	dbuf_evict_user(db);
+
+	if (db->db_state == DB_CACHED) {
+		ASSERT(db->db.db_data != NULL);
+		if (db->db_blkid == DMU_BONUS_BLKID) {
+			zio_buf_free(db->db.db_data, DN_MAX_BONUSLEN);
+			arc_space_return(DN_MAX_BONUSLEN, ARC_SPACE_OTHER);
+		}
+		db->db.db_data = NULL;
+		db->db_state = DB_UNCACHED;
+	}
+
+	ASSERT(db->db_state == DB_UNCACHED || db->db_state == DB_NOFILL);
+	ASSERT(db->db_data_pending == NULL);
+
+	db->db_state = DB_EVICTING;
+	db->db_blkptr = NULL;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	dndb = dn->dn_dbuf;
+	if (db->db_blkid != DMU_BONUS_BLKID && MUTEX_HELD(&dn->dn_dbufs_mtx)) {
+		list_remove(&dn->dn_dbufs, db);
+		(void) atomic_dec_32_nv(&dn->dn_dbufs_count);
+		membar_producer();
+		DB_DNODE_EXIT(db);
+		/*
+		 * Decrementing the dbuf count means that the hold corresponding
+		 * to the removed dbuf is no longer discounted in dnode_move(),
+		 * so the dnode cannot be moved until after we release the hold.
+		 * The membar_producer() ensures visibility of the decremented
+		 * value in dnode_move(), since DB_DNODE_EXIT doesn't actually
+		 * release any lock.
+		 */
+		dnode_rele(dn, db);
+		db->db_dnode_handle = NULL;
+	} else {
+		DB_DNODE_EXIT(db);
+	}
+
+	if (db->db_buf)
+		dbuf_gone = arc_buf_evict(db->db_buf);
+
+	if (!dbuf_gone)
+		mutex_exit(&db->db_mtx);
+
+	/*
+	 * If this dbuf is referenced from an indirect dbuf,
+	 * decrement the ref count on the indirect dbuf.
+	 */
+	if (parent && parent != dndb)
+		dbuf_rele(parent, db);
+}
+
+static int
+dbuf_findbp(dnode_t *dn, int level, uint64_t blkid, int fail_sparse,
+    dmu_buf_impl_t **parentp, blkptr_t **bpp)
+{
+	int nlevels, epbs;
+
+	*parentp = NULL;
+	*bpp = NULL;
+
+	ASSERT(blkid != DMU_BONUS_BLKID);
+
+	if (blkid == DMU_SPILL_BLKID) {
+		mutex_enter(&dn->dn_mtx);
+		if (dn->dn_have_spill &&
+		    (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR))
+			*bpp = &dn->dn_phys->dn_spill;
+		else
+			*bpp = NULL;
+		dbuf_add_ref(dn->dn_dbuf, NULL);
+		*parentp = dn->dn_dbuf;
+		mutex_exit(&dn->dn_mtx);
+		return (0);
+	}
+
+	if (dn->dn_phys->dn_nlevels == 0)
+		nlevels = 1;
+	else
+		nlevels = dn->dn_phys->dn_nlevels;
+
+	epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
+
+	ASSERT3U(level * epbs, <, 64);
+	ASSERT(RW_LOCK_HELD(&dn->dn_struct_rwlock));
+	if (level >= nlevels ||
+	    (blkid > (dn->dn_phys->dn_maxblkid >> (level * epbs)))) {
+		/* the buffer has no parent yet */
+		return (ENOENT);
+	} else if (level < nlevels-1) {
+		/* this block is referenced from an indirect block */
+		int err = dbuf_hold_impl(dn, level+1,
+		    blkid >> epbs, fail_sparse, NULL, parentp);
+		if (err)
+			return (err);
+		err = dbuf_read(*parentp, NULL,
+		    (DB_RF_HAVESTRUCT | DB_RF_NOPREFETCH | DB_RF_CANFAIL));
+		if (err) {
+			dbuf_rele(*parentp, NULL);
+			*parentp = NULL;
+			return (err);
+		}
+		*bpp = ((blkptr_t *)(*parentp)->db.db_data) +
+		    (blkid & ((1ULL << epbs) - 1));
+		return (0);
+	} else {
+		/* the block is referenced from the dnode */
+		ASSERT3U(level, ==, nlevels-1);
+		ASSERT(dn->dn_phys->dn_nblkptr == 0 ||
+		    blkid < dn->dn_phys->dn_nblkptr);
+		if (dn->dn_dbuf) {
+			dbuf_add_ref(dn->dn_dbuf, NULL);
+			*parentp = dn->dn_dbuf;
+		}
+		*bpp = &dn->dn_phys->dn_blkptr[blkid];
+		return (0);
+	}
+}
+
+static dmu_buf_impl_t *
+dbuf_create(dnode_t *dn, uint8_t level, uint64_t blkid,
+    dmu_buf_impl_t *parent, blkptr_t *blkptr)
+{
+	objset_t *os = dn->dn_objset;
+	dmu_buf_impl_t *db, *odb;
+
+	ASSERT(RW_LOCK_HELD(&dn->dn_struct_rwlock));
+	ASSERT(dn->dn_type != DMU_OT_NONE);
+
+	db = kmem_cache_alloc(dbuf_cache, KM_SLEEP);
+
+	db->db_objset = os;
+	db->db.db_object = dn->dn_object;
+	db->db_level = level;
+	db->db_blkid = blkid;
+	db->db_last_dirty = NULL;
+	db->db_dirtycnt = 0;
+	db->db_dnode_handle = dn->dn_handle;
+	db->db_parent = parent;
+	db->db_blkptr = blkptr;
+
+	db->db_user_ptr = NULL;
+	db->db_user_data_ptr_ptr = NULL;
+	db->db_evict_func = NULL;
+	db->db_immediate_evict = 0;
+	db->db_freed_in_flight = 0;
+
+	if (blkid == DMU_BONUS_BLKID) {
+		ASSERT3P(parent, ==, dn->dn_dbuf);
+		db->db.db_size = DN_MAX_BONUSLEN -
+		    (dn->dn_nblkptr-1) * sizeof (blkptr_t);
+		ASSERT3U(db->db.db_size, >=, dn->dn_bonuslen);
+		db->db.db_offset = DMU_BONUS_BLKID;
+		db->db_state = DB_UNCACHED;
+		/* the bonus dbuf is not placed in the hash table */
+		arc_space_consume(sizeof (dmu_buf_impl_t), ARC_SPACE_OTHER);
+		return (db);
+	} else if (blkid == DMU_SPILL_BLKID) {
+		db->db.db_size = (blkptr != NULL) ?
+		    BP_GET_LSIZE(blkptr) : SPA_MINBLOCKSIZE;
+		db->db.db_offset = 0;
+	} else {
+		int blocksize =
+		    db->db_level ? 1<<dn->dn_indblkshift :  dn->dn_datablksz;
+		db->db.db_size = blocksize;
+		db->db.db_offset = db->db_blkid * blocksize;
+	}
+
+	/*
+	 * Hold the dn_dbufs_mtx while we get the new dbuf
+	 * in the hash table *and* added to the dbufs list.
+	 * This prevents a possible deadlock with someone
+	 * trying to look up this dbuf before its added to the
+	 * dn_dbufs list.
+	 */
+	mutex_enter(&dn->dn_dbufs_mtx);
+	db->db_state = DB_EVICTING;
+	if ((odb = dbuf_hash_insert(db)) != NULL) {
+		/* someone else inserted it first */
+		kmem_cache_free(dbuf_cache, db);
+		mutex_exit(&dn->dn_dbufs_mtx);
+		return (odb);
+	}
+	list_insert_head(&dn->dn_dbufs, db);
+	db->db_state = DB_UNCACHED;
+	mutex_exit(&dn->dn_dbufs_mtx);
+	arc_space_consume(sizeof (dmu_buf_impl_t), ARC_SPACE_OTHER);
+
+	if (parent && parent != dn->dn_dbuf)
+		dbuf_add_ref(parent, db);
+
+	ASSERT(dn->dn_object == DMU_META_DNODE_OBJECT ||
+	    refcount_count(&dn->dn_holds) > 0);
+	(void) refcount_add(&dn->dn_holds, db);
+	(void) atomic_inc_32_nv(&dn->dn_dbufs_count);
+
+	dprintf_dbuf(db, "db=%p\n", db);
+
+	return (db);
+}
+
+static int
+dbuf_do_evict(void *private)
+{
+	arc_buf_t *buf = private;
+	dmu_buf_impl_t *db = buf->b_private;
+
+	if (!MUTEX_HELD(&db->db_mtx))
+		mutex_enter(&db->db_mtx);
+
+	ASSERT(refcount_is_zero(&db->db_holds));
+
+	if (db->db_state != DB_EVICTING) {
+		ASSERT(db->db_state == DB_CACHED);
+		DBUF_VERIFY(db);
+		db->db_buf = NULL;
+		dbuf_evict(db);
+	} else {
+		mutex_exit(&db->db_mtx);
+		dbuf_destroy(db);
+	}
+	return (0);
+}
+
+static void
+dbuf_destroy(dmu_buf_impl_t *db)
+{
+	ASSERT(refcount_is_zero(&db->db_holds));
+
+	if (db->db_blkid != DMU_BONUS_BLKID) {
+		/*
+		 * If this dbuf is still on the dn_dbufs list,
+		 * remove it from that list.
+		 */
+		if (db->db_dnode_handle != NULL) {
+			dnode_t *dn;
+
+			DB_DNODE_ENTER(db);
+			dn = DB_DNODE(db);
+			mutex_enter(&dn->dn_dbufs_mtx);
+			list_remove(&dn->dn_dbufs, db);
+			(void) atomic_dec_32_nv(&dn->dn_dbufs_count);
+			mutex_exit(&dn->dn_dbufs_mtx);
+			DB_DNODE_EXIT(db);
+			/*
+			 * Decrementing the dbuf count means that the hold
+			 * corresponding to the removed dbuf is no longer
+			 * discounted in dnode_move(), so the dnode cannot be
+			 * moved until after we release the hold.
+			 */
+			dnode_rele(dn, db);
+			db->db_dnode_handle = NULL;
+		}
+		dbuf_hash_remove(db);
+	}
+	db->db_parent = NULL;
+	db->db_buf = NULL;
+
+	ASSERT(!list_link_active(&db->db_link));
+	ASSERT(db->db.db_data == NULL);
+	ASSERT(db->db_hash_next == NULL);
+	ASSERT(db->db_blkptr == NULL);
+	ASSERT(db->db_data_pending == NULL);
+
+	kmem_cache_free(dbuf_cache, db);
+	arc_space_return(sizeof (dmu_buf_impl_t), ARC_SPACE_OTHER);
+}
+
+void
+dbuf_prefetch(dnode_t *dn, uint64_t blkid)
+{
+	dmu_buf_impl_t *db = NULL;
+	blkptr_t *bp = NULL;
+
+	ASSERT(blkid != DMU_BONUS_BLKID);
+	ASSERT(RW_LOCK_HELD(&dn->dn_struct_rwlock));
+
+	if (dnode_block_freed(dn, blkid))
+		return;
+
+	/* dbuf_find() returns with db_mtx held */
+	if (db = dbuf_find(dn, 0, blkid)) {
+		/*
+		 * This dbuf is already in the cache.  We assume that
+		 * it is already CACHED, or else about to be either
+		 * read or filled.
+		 */
+		mutex_exit(&db->db_mtx);
+		return;
+	}
+
+	if (dbuf_findbp(dn, 0, blkid, TRUE, &db, &bp) == 0) {
+		if (bp && !BP_IS_HOLE(bp)) {
+			int priority = dn->dn_type == DMU_OT_DDT_ZAP ?
+			    ZIO_PRIORITY_DDT_PREFETCH : ZIO_PRIORITY_ASYNC_READ;
+			arc_buf_t *pbuf;
+			dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset;
+			uint32_t aflags = ARC_NOWAIT | ARC_PREFETCH;
+			zbookmark_t zb;
+
+			SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET,
+			    dn->dn_object, 0, blkid);
+
+			if (db)
+				pbuf = db->db_buf;
+			else
+				pbuf = dn->dn_objset->os_phys_buf;
+
+			(void) dsl_read(NULL, dn->dn_objset->os_spa,
+			    bp, pbuf, NULL, NULL, priority,
+			    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
+			    &aflags, &zb);
+		}
+		if (db)
+			dbuf_rele(db, NULL);
+	}
+}
+
+/*
+ * Returns with db_holds incremented, and db_mtx not held.
+ * Note: dn_struct_rwlock must be held.
+ */
+int
+dbuf_hold_impl(dnode_t *dn, uint8_t level, uint64_t blkid, int fail_sparse,
+    void *tag, dmu_buf_impl_t **dbp)
+{
+	dmu_buf_impl_t *db, *parent = NULL;
+
+	ASSERT(blkid != DMU_BONUS_BLKID);
+	ASSERT(RW_LOCK_HELD(&dn->dn_struct_rwlock));
+	ASSERT3U(dn->dn_nlevels, >, level);
+
+	*dbp = NULL;
+top:
+	/* dbuf_find() returns with db_mtx held */
+	db = dbuf_find(dn, level, blkid);
+
+	if (db == NULL) {
+		blkptr_t *bp = NULL;
+		int err;
+
+		ASSERT3P(parent, ==, NULL);
+		err = dbuf_findbp(dn, level, blkid, fail_sparse, &parent, &bp);
+		if (fail_sparse) {
+			if (err == 0 && bp && BP_IS_HOLE(bp))
+				err = ENOENT;
+			if (err) {
+				if (parent)
+					dbuf_rele(parent, NULL);
+				return (err);
+			}
+		}
+		if (err && err != ENOENT)
+			return (err);
+		db = dbuf_create(dn, level, blkid, parent, bp);
+	}
+
+	if (db->db_buf && refcount_is_zero(&db->db_holds)) {
+		arc_buf_add_ref(db->db_buf, db);
+		if (db->db_buf->b_data == NULL) {
+			dbuf_clear(db);
+			if (parent) {
+				dbuf_rele(parent, NULL);
+				parent = NULL;
+			}
+			goto top;
+		}
+		ASSERT3P(db->db.db_data, ==, db->db_buf->b_data);
+	}
+
+	ASSERT(db->db_buf == NULL || arc_referenced(db->db_buf));
+
+	/*
+	 * If this buffer is currently syncing out, and we are are
+	 * still referencing it from db_data, we need to make a copy
+	 * of it in case we decide we want to dirty it again in this txg.
+	 */
+	if (db->db_level == 0 && db->db_blkid != DMU_BONUS_BLKID &&
+	    dn->dn_object != DMU_META_DNODE_OBJECT &&
+	    db->db_state == DB_CACHED && db->db_data_pending) {
+		dbuf_dirty_record_t *dr = db->db_data_pending;
+
+		if (dr->dt.dl.dr_data == db->db_buf) {
+			arc_buf_contents_t type = DBUF_GET_BUFC_TYPE(db);
+
+			dbuf_set_data(db,
+			    arc_buf_alloc(dn->dn_objset->os_spa,
+			    db->db.db_size, db, type));
+			bcopy(dr->dt.dl.dr_data->b_data, db->db.db_data,
+			    db->db.db_size);
+		}
+	}
+
+	(void) refcount_add(&db->db_holds, tag);
+	dbuf_update_data(db);
+	DBUF_VERIFY(db);
+	mutex_exit(&db->db_mtx);
+
+	/* NOTE: we can't rele the parent until after we drop the db_mtx */
+	if (parent)
+		dbuf_rele(parent, NULL);
+
+	ASSERT3P(DB_DNODE(db), ==, dn);
+	ASSERT3U(db->db_blkid, ==, blkid);
+	ASSERT3U(db->db_level, ==, level);
+	*dbp = db;
+
+	return (0);
+}
+
+dmu_buf_impl_t *
+dbuf_hold(dnode_t *dn, uint64_t blkid, void *tag)
+{
+	dmu_buf_impl_t *db;
+	int err = dbuf_hold_impl(dn, 0, blkid, FALSE, tag, &db);
+	return (err ? NULL : db);
+}
+
+dmu_buf_impl_t *
+dbuf_hold_level(dnode_t *dn, int level, uint64_t blkid, void *tag)
+{
+	dmu_buf_impl_t *db;
+	int err = dbuf_hold_impl(dn, level, blkid, FALSE, tag, &db);
+	return (err ? NULL : db);
+}
+
+void
+dbuf_create_bonus(dnode_t *dn)
+{
+	ASSERT(RW_WRITE_HELD(&dn->dn_struct_rwlock));
+
+	ASSERT(dn->dn_bonus == NULL);
+	dn->dn_bonus = dbuf_create(dn, 0, DMU_BONUS_BLKID, dn->dn_dbuf, NULL);
+}
+
+int
+dbuf_spill_set_blksz(dmu_buf_t *db_fake, uint64_t blksz, dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
+	dnode_t *dn;
+
+	if (db->db_blkid != DMU_SPILL_BLKID)
+		return (ENOTSUP);
+	if (blksz == 0)
+		blksz = SPA_MINBLOCKSIZE;
+	if (blksz > SPA_MAXBLOCKSIZE)
+		blksz = SPA_MAXBLOCKSIZE;
+	else
+		blksz = P2ROUNDUP(blksz, SPA_MINBLOCKSIZE);
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+	dbuf_new_size(db, blksz, tx);
+	rw_exit(&dn->dn_struct_rwlock);
+	DB_DNODE_EXIT(db);
+
+	return (0);
+}
+
+void
+dbuf_rm_spill(dnode_t *dn, dmu_tx_t *tx)
+{
+	dbuf_free_range(dn, DMU_SPILL_BLKID, DMU_SPILL_BLKID, tx);
+}
+
+#pragma weak dmu_buf_add_ref = dbuf_add_ref
+void
+dbuf_add_ref(dmu_buf_impl_t *db, void *tag)
+{
+	int64_t holds = refcount_add(&db->db_holds, tag);
+	ASSERT(holds > 1);
+}
+
+/*
+ * If you call dbuf_rele() you had better not be referencing the dnode handle
+ * unless you have some other direct or indirect hold on the dnode. (An indirect
+ * hold is a hold on one of the dnode's dbufs, including the bonus buffer.)
+ * Without that, the dbuf_rele() could lead to a dnode_rele() followed by the
+ * dnode's parent dbuf evicting its dnode handles.
+ */
+#pragma weak dmu_buf_rele = dbuf_rele
+void
+dbuf_rele(dmu_buf_impl_t *db, void *tag)
+{
+	mutex_enter(&db->db_mtx);
+	dbuf_rele_and_unlock(db, tag);
+}
+
+/*
+ * dbuf_rele() for an already-locked dbuf.  This is necessary to allow
+ * db_dirtycnt and db_holds to be updated atomically.
+ */
+void
+dbuf_rele_and_unlock(dmu_buf_impl_t *db, void *tag)
+{
+	int64_t holds;
+
+	ASSERT(MUTEX_HELD(&db->db_mtx));
+	DBUF_VERIFY(db);
+
+	/*
+	 * Remove the reference to the dbuf before removing its hold on the
+	 * dnode so we can guarantee in dnode_move() that a referenced bonus
+	 * buffer has a corresponding dnode hold.
+	 */
+	holds = refcount_remove(&db->db_holds, tag);
+	ASSERT(holds >= 0);
+
+	/*
+	 * We can't freeze indirects if there is a possibility that they
+	 * may be modified in the current syncing context.
+	 */
+	if (db->db_buf && holds == (db->db_level == 0 ? db->db_dirtycnt : 0))
+		arc_buf_freeze(db->db_buf);
+
+	if (holds == db->db_dirtycnt &&
+	    db->db_level == 0 && db->db_immediate_evict)
+		dbuf_evict_user(db);
+
+	if (holds == 0) {
+		if (db->db_blkid == DMU_BONUS_BLKID) {
+			mutex_exit(&db->db_mtx);
+
+			/*
+			 * If the dnode moves here, we cannot cross this barrier
+			 * until the move completes.
+			 */
+			DB_DNODE_ENTER(db);
+			(void) atomic_dec_32_nv(&DB_DNODE(db)->dn_dbufs_count);
+			DB_DNODE_EXIT(db);
+			/*
+			 * The bonus buffer's dnode hold is no longer discounted
+			 * in dnode_move(). The dnode cannot move until after
+			 * the dnode_rele().
+			 */
+			dnode_rele(DB_DNODE(db), db);
+		} else if (db->db_buf == NULL) {
+			/*
+			 * This is a special case: we never associated this
+			 * dbuf with any data allocated from the ARC.
+			 */
+			ASSERT(db->db_state == DB_UNCACHED ||
+			    db->db_state == DB_NOFILL);
+			dbuf_evict(db);
+		} else if (arc_released(db->db_buf)) {
+			arc_buf_t *buf = db->db_buf;
+			/*
+			 * This dbuf has anonymous data associated with it.
+			 */
+			dbuf_set_data(db, NULL);
+			VERIFY(arc_buf_remove_ref(buf, db) == 1);
+			dbuf_evict(db);
+		} else {
+			VERIFY(arc_buf_remove_ref(db->db_buf, db) == 0);
+			if (!DBUF_IS_CACHEABLE(db))
+				dbuf_clear(db);
+			else
+				mutex_exit(&db->db_mtx);
+		}
+	} else {
+		mutex_exit(&db->db_mtx);
+	}
+}
+
+#pragma weak dmu_buf_refcount = dbuf_refcount
+uint64_t
+dbuf_refcount(dmu_buf_impl_t *db)
+{
+	return (refcount_count(&db->db_holds));
+}
+
+void *
+dmu_buf_set_user(dmu_buf_t *db_fake, void *user_ptr, void *user_data_ptr_ptr,
+    dmu_buf_evict_func_t *evict_func)
+{
+	return (dmu_buf_update_user(db_fake, NULL, user_ptr,
+	    user_data_ptr_ptr, evict_func));
+}
+
+void *
+dmu_buf_set_user_ie(dmu_buf_t *db_fake, void *user_ptr, void *user_data_ptr_ptr,
+    dmu_buf_evict_func_t *evict_func)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
+
+	db->db_immediate_evict = TRUE;
+	return (dmu_buf_update_user(db_fake, NULL, user_ptr,
+	    user_data_ptr_ptr, evict_func));
+}
+
+void *
+dmu_buf_update_user(dmu_buf_t *db_fake, void *old_user_ptr, void *user_ptr,
+    void *user_data_ptr_ptr, dmu_buf_evict_func_t *evict_func)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
+	ASSERT(db->db_level == 0);
+
+	ASSERT((user_ptr == NULL) == (evict_func == NULL));
+
+	mutex_enter(&db->db_mtx);
+
+	if (db->db_user_ptr == old_user_ptr) {
+		db->db_user_ptr = user_ptr;
+		db->db_user_data_ptr_ptr = user_data_ptr_ptr;
+		db->db_evict_func = evict_func;
+
+		dbuf_update_data(db);
+	} else {
+		old_user_ptr = db->db_user_ptr;
+	}
+
+	mutex_exit(&db->db_mtx);
+	return (old_user_ptr);
+}
+
+void *
+dmu_buf_get_user(dmu_buf_t *db_fake)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
+	ASSERT(!refcount_is_zero(&db->db_holds));
+
+	return (db->db_user_ptr);
+}
+
+boolean_t
+dmu_buf_freeable(dmu_buf_t *dbuf)
+{
+	boolean_t res = B_FALSE;
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)dbuf;
+
+	if (db->db_blkptr)
+		res = dsl_dataset_block_freeable(db->db_objset->os_dsl_dataset,
+		    db->db_blkptr, db->db_blkptr->blk_birth);
+
+	return (res);
+}
+
+static void
+dbuf_check_blkptr(dnode_t *dn, dmu_buf_impl_t *db)
+{
+	/* ASSERT(dmu_tx_is_syncing(tx) */
+	ASSERT(MUTEX_HELD(&db->db_mtx));
+
+	if (db->db_blkptr != NULL)
+		return;
+
+	if (db->db_blkid == DMU_SPILL_BLKID) {
+		db->db_blkptr = &dn->dn_phys->dn_spill;
+		BP_ZERO(db->db_blkptr);
+		return;
+	}
+	if (db->db_level == dn->dn_phys->dn_nlevels-1) {
+		/*
+		 * This buffer was allocated at a time when there was
+		 * no available blkptrs from the dnode, or it was
+		 * inappropriate to hook it in (i.e., nlevels mis-match).
+		 */
+		ASSERT(db->db_blkid < dn->dn_phys->dn_nblkptr);
+		ASSERT(db->db_parent == NULL);
+		db->db_parent = dn->dn_dbuf;
+		db->db_blkptr = &dn->dn_phys->dn_blkptr[db->db_blkid];
+		DBUF_VERIFY(db);
+	} else {
+		dmu_buf_impl_t *parent = db->db_parent;
+		int epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT;
+
+		ASSERT(dn->dn_phys->dn_nlevels > 1);
+		if (parent == NULL) {
+			mutex_exit(&db->db_mtx);
+			rw_enter(&dn->dn_struct_rwlock, RW_READER);
+			(void) dbuf_hold_impl(dn, db->db_level+1,
+			    db->db_blkid >> epbs, FALSE, db, &parent);
+			rw_exit(&dn->dn_struct_rwlock);
+			mutex_enter(&db->db_mtx);
+			db->db_parent = parent;
+		}
+		db->db_blkptr = (blkptr_t *)parent->db.db_data +
+		    (db->db_blkid & ((1ULL << epbs) - 1));
+		DBUF_VERIFY(db);
+	}
+}
+
+static void
+dbuf_sync_indirect(dbuf_dirty_record_t *dr, dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *db = dr->dr_dbuf;
+	dnode_t *dn;
+	zio_t *zio;
+
+	ASSERT(dmu_tx_is_syncing(tx));
+
+	dprintf_dbuf_bp(db, db->db_blkptr, "blkptr=%p", db->db_blkptr);
+
+	mutex_enter(&db->db_mtx);
+
+	ASSERT(db->db_level > 0);
+	DBUF_VERIFY(db);
+
+	if (db->db_buf == NULL) {
+		mutex_exit(&db->db_mtx);
+		(void) dbuf_read(db, NULL, DB_RF_MUST_SUCCEED);
+		mutex_enter(&db->db_mtx);
+	}
+	ASSERT3U(db->db_state, ==, DB_CACHED);
+	ASSERT(db->db_buf != NULL);
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	ASSERT3U(db->db.db_size, ==, 1<<dn->dn_phys->dn_indblkshift);
+	dbuf_check_blkptr(dn, db);
+	DB_DNODE_EXIT(db);
+
+	db->db_data_pending = dr;
+
+	mutex_exit(&db->db_mtx);
+	dbuf_write(dr, db->db_buf, tx);
+
+	zio = dr->dr_zio;
+	mutex_enter(&dr->dt.di.dr_mtx);
+	dbuf_sync_list(&dr->dt.di.dr_children, tx);
+	ASSERT(list_head(&dr->dt.di.dr_children) == NULL);
+	mutex_exit(&dr->dt.di.dr_mtx);
+	zio_nowait(zio);
+}
+
+static void
+dbuf_sync_leaf(dbuf_dirty_record_t *dr, dmu_tx_t *tx)
+{
+	arc_buf_t **datap = &dr->dt.dl.dr_data;
+	dmu_buf_impl_t *db = dr->dr_dbuf;
+	dnode_t *dn;
+	objset_t *os;
+	uint64_t txg = tx->tx_txg;
+
+	ASSERT(dmu_tx_is_syncing(tx));
+
+	dprintf_dbuf_bp(db, db->db_blkptr, "blkptr=%p", db->db_blkptr);
+
+	mutex_enter(&db->db_mtx);
+	/*
+	 * To be synced, we must be dirtied.  But we
+	 * might have been freed after the dirty.
+	 */
+	if (db->db_state == DB_UNCACHED) {
+		/* This buffer has been freed since it was dirtied */
+		ASSERT(db->db.db_data == NULL);
+	} else if (db->db_state == DB_FILL) {
+		/* This buffer was freed and is now being re-filled */
+		ASSERT(db->db.db_data != dr->dt.dl.dr_data);
+	} else {
+		ASSERT(db->db_state == DB_CACHED || db->db_state == DB_NOFILL);
+	}
+	DBUF_VERIFY(db);
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+
+	if (db->db_blkid == DMU_SPILL_BLKID) {
+		mutex_enter(&dn->dn_mtx);
+		dn->dn_phys->dn_flags |= DNODE_FLAG_SPILL_BLKPTR;
+		mutex_exit(&dn->dn_mtx);
+	}
+
+	/*
+	 * If this is a bonus buffer, simply copy the bonus data into the
+	 * dnode.  It will be written out when the dnode is synced (and it
+	 * will be synced, since it must have been dirty for dbuf_sync to
+	 * be called).
+	 */
+	if (db->db_blkid == DMU_BONUS_BLKID) {
+		dbuf_dirty_record_t **drp;
+
+		ASSERT(*datap != NULL);
+		ASSERT3U(db->db_level, ==, 0);
+		ASSERT3U(dn->dn_phys->dn_bonuslen, <=, DN_MAX_BONUSLEN);
+		bcopy(*datap, DN_BONUS(dn->dn_phys), dn->dn_phys->dn_bonuslen);
+		DB_DNODE_EXIT(db);
+
+		if (*datap != db->db.db_data) {
+			zio_buf_free(*datap, DN_MAX_BONUSLEN);
+			arc_space_return(DN_MAX_BONUSLEN, ARC_SPACE_OTHER);
+		}
+		db->db_data_pending = NULL;
+		drp = &db->db_last_dirty;
+		while (*drp != dr)
+			drp = &(*drp)->dr_next;
+		ASSERT(dr->dr_next == NULL);
+		ASSERT(dr->dr_dbuf == db);
+		*drp = dr->dr_next;
+		kmem_free(dr, sizeof (dbuf_dirty_record_t));
+		ASSERT(db->db_dirtycnt > 0);
+		db->db_dirtycnt -= 1;
+		dbuf_rele_and_unlock(db, (void *)(uintptr_t)txg);
+		return;
+	}
+
+	os = dn->dn_objset;
+
+	/*
+	 * This function may have dropped the db_mtx lock allowing a dmu_sync
+	 * operation to sneak in. As a result, we need to ensure that we
+	 * don't check the dr_override_state until we have returned from
+	 * dbuf_check_blkptr.
+	 */
+	dbuf_check_blkptr(dn, db);
+
+	/*
+	 * If this buffer is in the middle of an immediate write,
+	 * wait for the synchronous IO to complete.
+	 */
+	while (dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC) {
+		ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
+		cv_wait(&db->db_changed, &db->db_mtx);
+		ASSERT(dr->dt.dl.dr_override_state != DR_NOT_OVERRIDDEN);
+	}
+
+	if (db->db_state != DB_NOFILL &&
+	    dn->dn_object != DMU_META_DNODE_OBJECT &&
+	    refcount_count(&db->db_holds) > 1 &&
+	    dr->dt.dl.dr_override_state != DR_OVERRIDDEN &&
+	    *datap == db->db_buf) {
+		/*
+		 * If this buffer is currently "in use" (i.e., there
+		 * are active holds and db_data still references it),
+		 * then make a copy before we start the write so that
+		 * any modifications from the open txg will not leak
+		 * into this write.
+		 *
+		 * NOTE: this copy does not need to be made for
+		 * objects only modified in the syncing context (e.g.
+		 * DNONE_DNODE blocks).
+		 */
+		int blksz = arc_buf_size(*datap);
+		arc_buf_contents_t type = DBUF_GET_BUFC_TYPE(db);
+		*datap = arc_buf_alloc(os->os_spa, blksz, db, type);
+		bcopy(db->db.db_data, (*datap)->b_data, blksz);
+	}
+	db->db_data_pending = dr;
+
+	mutex_exit(&db->db_mtx);
+
+	dbuf_write(dr, *datap, tx);
+
+	ASSERT(!list_link_active(&dr->dr_dirty_node));
+	if (dn->dn_object == DMU_META_DNODE_OBJECT) {
+		list_insert_tail(&dn->dn_dirty_records[txg&TXG_MASK], dr);
+		DB_DNODE_EXIT(db);
+	} else {
+		/*
+		 * Although zio_nowait() does not "wait for an IO", it does
+		 * initiate the IO. If this is an empty write it seems plausible
+		 * that the IO could actually be completed before the nowait
+		 * returns. We need to DB_DNODE_EXIT() first in case
+		 * zio_nowait() invalidates the dbuf.
+		 */
+		DB_DNODE_EXIT(db);
+		zio_nowait(dr->dr_zio);
+	}
+}
+
+void
+dbuf_sync_list(list_t *list, dmu_tx_t *tx)
+{
+	dbuf_dirty_record_t *dr;
+
+	while (dr = list_head(list)) {
+		if (dr->dr_zio != NULL) {
+			/*
+			 * If we find an already initialized zio then we
+			 * are processing the meta-dnode, and we have finished.
+			 * The dbufs for all dnodes are put back on the list
+			 * during processing, so that we can zio_wait()
+			 * these IOs after initiating all child IOs.
+			 */
+			ASSERT3U(dr->dr_dbuf->db.db_object, ==,
+			    DMU_META_DNODE_OBJECT);
+			break;
+		}
+		list_remove(list, dr);
+		if (dr->dr_dbuf->db_level > 0)
+			dbuf_sync_indirect(dr, tx);
+		else
+			dbuf_sync_leaf(dr, tx);
+	}
+}
+
+/* ARGSUSED */
+static void
+dbuf_write_ready(zio_t *zio, arc_buf_t *buf, void *vdb)
+{
+	dmu_buf_impl_t *db = vdb;
+	dnode_t *dn;
+	blkptr_t *bp = zio->io_bp;
+	blkptr_t *bp_orig = &zio->io_bp_orig;
+	spa_t *spa = zio->io_spa;
+	int64_t delta;
+	uint64_t fill = 0;
+	int i;
+
+	ASSERT(db->db_blkptr == bp);
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	delta = bp_get_dsize_sync(spa, bp) - bp_get_dsize_sync(spa, bp_orig);
+	dnode_diduse_space(dn, delta - zio->io_prev_space_delta);
+	zio->io_prev_space_delta = delta;
+
+	if (BP_IS_HOLE(bp)) {
+		ASSERT(bp->blk_fill == 0);
+		DB_DNODE_EXIT(db);
+		return;
+	}
+
+	ASSERT((db->db_blkid != DMU_SPILL_BLKID &&
+	    BP_GET_TYPE(bp) == dn->dn_type) ||
+	    (db->db_blkid == DMU_SPILL_BLKID &&
+	    BP_GET_TYPE(bp) == dn->dn_bonustype));
+	ASSERT(BP_GET_LEVEL(bp) == db->db_level);
+
+	mutex_enter(&db->db_mtx);
+
+#ifdef ZFS_DEBUG
+	if (db->db_blkid == DMU_SPILL_BLKID) {
+		ASSERT(dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR);
+		ASSERT(!(BP_IS_HOLE(db->db_blkptr)) &&
+		    db->db_blkptr == &dn->dn_phys->dn_spill);
+	}
+#endif
+
+	if (db->db_level == 0) {
+		mutex_enter(&dn->dn_mtx);
+		if (db->db_blkid > dn->dn_phys->dn_maxblkid &&
+		    db->db_blkid != DMU_SPILL_BLKID)
+			dn->dn_phys->dn_maxblkid = db->db_blkid;
+		mutex_exit(&dn->dn_mtx);
+
+		if (dn->dn_type == DMU_OT_DNODE) {
+			dnode_phys_t *dnp = db->db.db_data;
+			for (i = db->db.db_size >> DNODE_SHIFT; i > 0;
+			    i--, dnp++) {
+				if (dnp->dn_type != DMU_OT_NONE)
+					fill++;
+			}
+		} else {
+			fill = 1;
+		}
+	} else {
+		blkptr_t *ibp = db->db.db_data;
+		ASSERT3U(db->db.db_size, ==, 1<<dn->dn_phys->dn_indblkshift);
+		for (i = db->db.db_size >> SPA_BLKPTRSHIFT; i > 0; i--, ibp++) {
+			if (BP_IS_HOLE(ibp))
+				continue;
+			fill += ibp->blk_fill;
+		}
+	}
+	DB_DNODE_EXIT(db);
+
+	bp->blk_fill = fill;
+
+	mutex_exit(&db->db_mtx);
+}
+
+/* ARGSUSED */
+static void
+dbuf_write_done(zio_t *zio, arc_buf_t *buf, void *vdb)
+{
+	dmu_buf_impl_t *db = vdb;
+	blkptr_t *bp = zio->io_bp;
+	blkptr_t *bp_orig = &zio->io_bp_orig;
+	uint64_t txg = zio->io_txg;
+	dbuf_dirty_record_t **drp, *dr;
+
+	ASSERT3U(zio->io_error, ==, 0);
+	ASSERT(db->db_blkptr == bp);
+
+	if (zio->io_flags & ZIO_FLAG_IO_REWRITE) {
+		ASSERT(BP_EQUAL(bp, bp_orig));
+	} else {
+		objset_t *os;
+		dsl_dataset_t *ds;
+		dmu_tx_t *tx;
+
+		DB_GET_OBJSET(&os, db);
+		ds = os->os_dsl_dataset;
+		tx = os->os_synctx;
+
+		(void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE);
+		dsl_dataset_block_born(ds, bp, tx);
+	}
+
+	mutex_enter(&db->db_mtx);
+
+	DBUF_VERIFY(db);
+
+	drp = &db->db_last_dirty;
+	while ((dr = *drp) != db->db_data_pending)
+		drp = &dr->dr_next;
+	ASSERT(!list_link_active(&dr->dr_dirty_node));
+	ASSERT(dr->dr_txg == txg);
+	ASSERT(dr->dr_dbuf == db);
+	ASSERT(dr->dr_next == NULL);
+	*drp = dr->dr_next;
+
+#ifdef ZFS_DEBUG
+	if (db->db_blkid == DMU_SPILL_BLKID) {
+		dnode_t *dn;
+
+		DB_DNODE_ENTER(db);
+		dn = DB_DNODE(db);
+		ASSERT(dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR);
+		ASSERT(!(BP_IS_HOLE(db->db_blkptr)) &&
+		    db->db_blkptr == &dn->dn_phys->dn_spill);
+		DB_DNODE_EXIT(db);
+	}
+#endif
+
+	if (db->db_level == 0) {
+		ASSERT(db->db_blkid != DMU_BONUS_BLKID);
+		ASSERT(dr->dt.dl.dr_override_state == DR_NOT_OVERRIDDEN);
+		if (db->db_state != DB_NOFILL) {
+			if (dr->dt.dl.dr_data != db->db_buf)
+				VERIFY(arc_buf_remove_ref(dr->dt.dl.dr_data,
+				    db) == 1);
+			else if (!arc_released(db->db_buf))
+				arc_set_callback(db->db_buf, dbuf_do_evict, db);
+		}
+	} else {
+		dnode_t *dn;
+
+		DB_DNODE_ENTER(db);
+		dn = DB_DNODE(db);
+		ASSERT(list_head(&dr->dt.di.dr_children) == NULL);
+		ASSERT3U(db->db.db_size, ==, 1<<dn->dn_phys->dn_indblkshift);
+		if (!BP_IS_HOLE(db->db_blkptr)) {
+			int epbs =
+			    dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT;
+			ASSERT3U(BP_GET_LSIZE(db->db_blkptr), ==,
+			    db->db.db_size);
+			ASSERT3U(dn->dn_phys->dn_maxblkid
+			    >> (db->db_level * epbs), >=, db->db_blkid);
+			arc_set_callback(db->db_buf, dbuf_do_evict, db);
+		}
+		DB_DNODE_EXIT(db);
+		mutex_destroy(&dr->dt.di.dr_mtx);
+		list_destroy(&dr->dt.di.dr_children);
+	}
+	kmem_free(dr, sizeof (dbuf_dirty_record_t));
+
+	cv_broadcast(&db->db_changed);
+	ASSERT(db->db_dirtycnt > 0);
+	db->db_dirtycnt -= 1;
+	db->db_data_pending = NULL;
+	dbuf_rele_and_unlock(db, (void *)(uintptr_t)txg);
+}
+
+static void
+dbuf_write_nofill_ready(zio_t *zio)
+{
+	dbuf_write_ready(zio, NULL, zio->io_private);
+}
+
+static void
+dbuf_write_nofill_done(zio_t *zio)
+{
+	dbuf_write_done(zio, NULL, zio->io_private);
+}
+
+static void
+dbuf_write_override_ready(zio_t *zio)
+{
+	dbuf_dirty_record_t *dr = zio->io_private;
+	dmu_buf_impl_t *db = dr->dr_dbuf;
+
+	dbuf_write_ready(zio, NULL, db);
+}
+
+static void
+dbuf_write_override_done(zio_t *zio)
+{
+	dbuf_dirty_record_t *dr = zio->io_private;
+	dmu_buf_impl_t *db = dr->dr_dbuf;
+	blkptr_t *obp = &dr->dt.dl.dr_overridden_by;
+
+	mutex_enter(&db->db_mtx);
+	if (!BP_EQUAL(zio->io_bp, obp)) {
+		if (!BP_IS_HOLE(obp))
+			dsl_free(spa_get_dsl(zio->io_spa), zio->io_txg, obp);
+		arc_release(dr->dt.dl.dr_data, db);
+	}
+	mutex_exit(&db->db_mtx);
+
+	dbuf_write_done(zio, NULL, db);
+}
+
+static void
+dbuf_write(dbuf_dirty_record_t *dr, arc_buf_t *data, dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *db = dr->dr_dbuf;
+	dnode_t *dn;
+	objset_t *os;
+	dmu_buf_impl_t *parent = db->db_parent;
+	uint64_t txg = tx->tx_txg;
+	zbookmark_t zb;
+	zio_prop_t zp;
+	zio_t *zio;
+	int wp_flag = 0;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	os = dn->dn_objset;
+
+	if (db->db_state != DB_NOFILL) {
+		if (db->db_level > 0 || dn->dn_type == DMU_OT_DNODE) {
+			/*
+			 * Private object buffers are released here rather
+			 * than in dbuf_dirty() since they are only modified
+			 * in the syncing context and we don't want the
+			 * overhead of making multiple copies of the data.
+			 */
+			if (BP_IS_HOLE(db->db_blkptr)) {
+				arc_buf_thaw(data);
+			} else {
+				dbuf_release_bp(db);
+			}
+		}
+	}
+
+	if (parent != dn->dn_dbuf) {
+		ASSERT(parent && parent->db_data_pending);
+		ASSERT(db->db_level == parent->db_level-1);
+		ASSERT(arc_released(parent->db_buf));
+		zio = parent->db_data_pending->dr_zio;
+	} else {
+		ASSERT((db->db_level == dn->dn_phys->dn_nlevels-1 &&
+		    db->db_blkid != DMU_SPILL_BLKID) ||
+		    (db->db_blkid == DMU_SPILL_BLKID && db->db_level == 0));
+		if (db->db_blkid != DMU_SPILL_BLKID)
+			ASSERT3P(db->db_blkptr, ==,
+			    &dn->dn_phys->dn_blkptr[db->db_blkid]);
+		zio = dn->dn_zio;
+	}
+
+	ASSERT(db->db_level == 0 || data == db->db_buf);
+	ASSERT3U(db->db_blkptr->blk_birth, <=, txg);
+	ASSERT(zio);
+
+	SET_BOOKMARK(&zb, os->os_dsl_dataset ?
+	    os->os_dsl_dataset->ds_object : DMU_META_OBJSET,
+	    db->db.db_object, db->db_level, db->db_blkid);
+
+	if (db->db_blkid == DMU_SPILL_BLKID)
+		wp_flag = WP_SPILL;
+	wp_flag |= (db->db_state == DB_NOFILL) ? WP_NOFILL : 0;
+
+	dmu_write_policy(os, dn, db->db_level, wp_flag, &zp);
+	DB_DNODE_EXIT(db);
+
+	if (db->db_level == 0 && dr->dt.dl.dr_override_state == DR_OVERRIDDEN) {
+		ASSERT(db->db_state != DB_NOFILL);
+		dr->dr_zio = zio_write(zio, os->os_spa, txg,
+		    db->db_blkptr, data->b_data, arc_buf_size(data), &zp,
+		    dbuf_write_override_ready, dbuf_write_override_done, dr,
+		    ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
+		mutex_enter(&db->db_mtx);
+		dr->dt.dl.dr_override_state = DR_NOT_OVERRIDDEN;
+		zio_write_override(dr->dr_zio, &dr->dt.dl.dr_overridden_by,
+		    dr->dt.dl.dr_copies);
+		mutex_exit(&db->db_mtx);
+	} else if (db->db_state == DB_NOFILL) {
+		ASSERT(zp.zp_checksum == ZIO_CHECKSUM_OFF);
+		dr->dr_zio = zio_write(zio, os->os_spa, txg,
+		    db->db_blkptr, NULL, db->db.db_size, &zp,
+		    dbuf_write_nofill_ready, dbuf_write_nofill_done, db,
+		    ZIO_PRIORITY_ASYNC_WRITE,
+		    ZIO_FLAG_MUSTSUCCEED | ZIO_FLAG_NODATA, &zb);
+	} else {
+		ASSERT(arc_released(data));
+		dr->dr_zio = arc_write(zio, os->os_spa, txg,
+		    db->db_blkptr, data, DBUF_IS_L2CACHEABLE(db), &zp,
+		    dbuf_write_ready, dbuf_write_done, db,
+		    ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
+	}
+}
diff --git a/uts/common/fs/zfs/ddt.c b/uts/common/fs/zfs/ddt.c
new file mode 100644
index 000000000000..718331496765
--- /dev/null
+++ b/uts/common/fs/zfs/ddt.c
@@ -0,0 +1,1146 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/spa_impl.h>
+#include <sys/zio.h>
+#include <sys/ddt.h>
+#include <sys/zap.h>
+#include <sys/dmu_tx.h>
+#include <sys/arc.h>
+#include <sys/dsl_pool.h>
+#include <sys/zio_checksum.h>
+#include <sys/zio_compress.h>
+#include <sys/dsl_scan.h>
+
+/*
+ * Enable/disable prefetching of dedup-ed blocks which are going to be freed.
+ */
+int zfs_dedup_prefetch = 1;
+
+static const ddt_ops_t *ddt_ops[DDT_TYPES] = {
+	&ddt_zap_ops,
+};
+
+static const char *ddt_class_name[DDT_CLASSES] = {
+	"ditto",
+	"duplicate",
+	"unique",
+};
+
+static void
+ddt_object_create(ddt_t *ddt, enum ddt_type type, enum ddt_class class,
+    dmu_tx_t *tx)
+{
+	spa_t *spa = ddt->ddt_spa;
+	objset_t *os = ddt->ddt_os;
+	uint64_t *objectp = &ddt->ddt_object[type][class];
+	boolean_t prehash = zio_checksum_table[ddt->ddt_checksum].ci_dedup;
+	char name[DDT_NAMELEN];
+
+	ddt_object_name(ddt, type, class, name);
+
+	ASSERT(*objectp == 0);
+	VERIFY(ddt_ops[type]->ddt_op_create(os, objectp, tx, prehash) == 0);
+	ASSERT(*objectp != 0);
+
+	VERIFY(zap_add(os, DMU_POOL_DIRECTORY_OBJECT, name,
+	    sizeof (uint64_t), 1, objectp, tx) == 0);
+
+	VERIFY(zap_add(os, spa->spa_ddt_stat_object, name,
+	    sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t),
+	    &ddt->ddt_histogram[type][class], tx) == 0);
+}
+
+static void
+ddt_object_destroy(ddt_t *ddt, enum ddt_type type, enum ddt_class class,
+    dmu_tx_t *tx)
+{
+	spa_t *spa = ddt->ddt_spa;
+	objset_t *os = ddt->ddt_os;
+	uint64_t *objectp = &ddt->ddt_object[type][class];
+	char name[DDT_NAMELEN];
+
+	ddt_object_name(ddt, type, class, name);
+
+	ASSERT(*objectp != 0);
+	ASSERT(ddt_object_count(ddt, type, class) == 0);
+	ASSERT(ddt_histogram_empty(&ddt->ddt_histogram[type][class]));
+	VERIFY(zap_remove(os, DMU_POOL_DIRECTORY_OBJECT, name, tx) == 0);
+	VERIFY(zap_remove(os, spa->spa_ddt_stat_object, name, tx) == 0);
+	VERIFY(ddt_ops[type]->ddt_op_destroy(os, *objectp, tx) == 0);
+	bzero(&ddt->ddt_object_stats[type][class], sizeof (ddt_object_t));
+
+	*objectp = 0;
+}
+
+static int
+ddt_object_load(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
+{
+	ddt_object_t *ddo = &ddt->ddt_object_stats[type][class];
+	dmu_object_info_t doi;
+	char name[DDT_NAMELEN];
+	int error;
+
+	ddt_object_name(ddt, type, class, name);
+
+	error = zap_lookup(ddt->ddt_os, DMU_POOL_DIRECTORY_OBJECT, name,
+	    sizeof (uint64_t), 1, &ddt->ddt_object[type][class]);
+
+	if (error)
+		return (error);
+
+	error = zap_lookup(ddt->ddt_os, ddt->ddt_spa->spa_ddt_stat_object, name,
+	    sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t),
+	    &ddt->ddt_histogram[type][class]);
+
+	/*
+	 * Seed the cached statistics.
+	 */
+	VERIFY(ddt_object_info(ddt, type, class, &doi) == 0);
+
+	ddo->ddo_count = ddt_object_count(ddt, type, class);
+	ddo->ddo_dspace = doi.doi_physical_blocks_512 << 9;
+	ddo->ddo_mspace = doi.doi_fill_count * doi.doi_data_block_size;
+
+	ASSERT(error == 0);
+	return (error);
+}
+
+static void
+ddt_object_sync(ddt_t *ddt, enum ddt_type type, enum ddt_class class,
+    dmu_tx_t *tx)
+{
+	ddt_object_t *ddo = &ddt->ddt_object_stats[type][class];
+	dmu_object_info_t doi;
+	char name[DDT_NAMELEN];
+
+	ddt_object_name(ddt, type, class, name);
+
+	VERIFY(zap_update(ddt->ddt_os, ddt->ddt_spa->spa_ddt_stat_object, name,
+	    sizeof (uint64_t), sizeof (ddt_histogram_t) / sizeof (uint64_t),
+	    &ddt->ddt_histogram[type][class], tx) == 0);
+
+	/*
+	 * Cache DDT statistics; this is the only time they'll change.
+	 */
+	VERIFY(ddt_object_info(ddt, type, class, &doi) == 0);
+
+	ddo->ddo_count = ddt_object_count(ddt, type, class);
+	ddo->ddo_dspace = doi.doi_physical_blocks_512 << 9;
+	ddo->ddo_mspace = doi.doi_fill_count * doi.doi_data_block_size;
+}
+
+static int
+ddt_object_lookup(ddt_t *ddt, enum ddt_type type, enum ddt_class class,
+    ddt_entry_t *dde)
+{
+	if (!ddt_object_exists(ddt, type, class))
+		return (ENOENT);
+
+	return (ddt_ops[type]->ddt_op_lookup(ddt->ddt_os,
+	    ddt->ddt_object[type][class], dde));
+}
+
+static void
+ddt_object_prefetch(ddt_t *ddt, enum ddt_type type, enum ddt_class class,
+    ddt_entry_t *dde)
+{
+	if (!ddt_object_exists(ddt, type, class))
+		return;
+
+	ddt_ops[type]->ddt_op_prefetch(ddt->ddt_os,
+	    ddt->ddt_object[type][class], dde);
+}
+
+int
+ddt_object_update(ddt_t *ddt, enum ddt_type type, enum ddt_class class,
+    ddt_entry_t *dde, dmu_tx_t *tx)
+{
+	ASSERT(ddt_object_exists(ddt, type, class));
+
+	return (ddt_ops[type]->ddt_op_update(ddt->ddt_os,
+	    ddt->ddt_object[type][class], dde, tx));
+}
+
+static int
+ddt_object_remove(ddt_t *ddt, enum ddt_type type, enum ddt_class class,
+    ddt_entry_t *dde, dmu_tx_t *tx)
+{
+	ASSERT(ddt_object_exists(ddt, type, class));
+
+	return (ddt_ops[type]->ddt_op_remove(ddt->ddt_os,
+	    ddt->ddt_object[type][class], dde, tx));
+}
+
+int
+ddt_object_walk(ddt_t *ddt, enum ddt_type type, enum ddt_class class,
+    uint64_t *walk, ddt_entry_t *dde)
+{
+	ASSERT(ddt_object_exists(ddt, type, class));
+
+	return (ddt_ops[type]->ddt_op_walk(ddt->ddt_os,
+	    ddt->ddt_object[type][class], dde, walk));
+}
+
+uint64_t
+ddt_object_count(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
+{
+	ASSERT(ddt_object_exists(ddt, type, class));
+
+	return (ddt_ops[type]->ddt_op_count(ddt->ddt_os,
+	    ddt->ddt_object[type][class]));
+}
+
+int
+ddt_object_info(ddt_t *ddt, enum ddt_type type, enum ddt_class class,
+    dmu_object_info_t *doi)
+{
+	if (!ddt_object_exists(ddt, type, class))
+		return (ENOENT);
+
+	return (dmu_object_info(ddt->ddt_os, ddt->ddt_object[type][class],
+	    doi));
+}
+
+boolean_t
+ddt_object_exists(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
+{
+	return (!!ddt->ddt_object[type][class]);
+}
+
+void
+ddt_object_name(ddt_t *ddt, enum ddt_type type, enum ddt_class class,
+    char *name)
+{
+	(void) sprintf(name, DMU_POOL_DDT,
+	    zio_checksum_table[ddt->ddt_checksum].ci_name,
+	    ddt_ops[type]->ddt_op_name, ddt_class_name[class]);
+}
+
+void
+ddt_bp_fill(const ddt_phys_t *ddp, blkptr_t *bp, uint64_t txg)
+{
+	ASSERT(txg != 0);
+
+	for (int d = 0; d < SPA_DVAS_PER_BP; d++)
+		bp->blk_dva[d] = ddp->ddp_dva[d];
+	BP_SET_BIRTH(bp, txg, ddp->ddp_phys_birth);
+}
+
+void
+ddt_bp_create(enum zio_checksum checksum,
+    const ddt_key_t *ddk, const ddt_phys_t *ddp, blkptr_t *bp)
+{
+	BP_ZERO(bp);
+
+	if (ddp != NULL)
+		ddt_bp_fill(ddp, bp, ddp->ddp_phys_birth);
+
+	bp->blk_cksum = ddk->ddk_cksum;
+	bp->blk_fill = 1;
+
+	BP_SET_LSIZE(bp, DDK_GET_LSIZE(ddk));
+	BP_SET_PSIZE(bp, DDK_GET_PSIZE(ddk));
+	BP_SET_COMPRESS(bp, DDK_GET_COMPRESS(ddk));
+	BP_SET_CHECKSUM(bp, checksum);
+	BP_SET_TYPE(bp, DMU_OT_DEDUP);
+	BP_SET_LEVEL(bp, 0);
+	BP_SET_DEDUP(bp, 0);
+	BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
+}
+
+void
+ddt_key_fill(ddt_key_t *ddk, const blkptr_t *bp)
+{
+	ddk->ddk_cksum = bp->blk_cksum;
+	ddk->ddk_prop = 0;
+
+	DDK_SET_LSIZE(ddk, BP_GET_LSIZE(bp));
+	DDK_SET_PSIZE(ddk, BP_GET_PSIZE(bp));
+	DDK_SET_COMPRESS(ddk, BP_GET_COMPRESS(bp));
+}
+
+void
+ddt_phys_fill(ddt_phys_t *ddp, const blkptr_t *bp)
+{
+	ASSERT(ddp->ddp_phys_birth == 0);
+
+	for (int d = 0; d < SPA_DVAS_PER_BP; d++)
+		ddp->ddp_dva[d] = bp->blk_dva[d];
+	ddp->ddp_phys_birth = BP_PHYSICAL_BIRTH(bp);
+}
+
+void
+ddt_phys_clear(ddt_phys_t *ddp)
+{
+	bzero(ddp, sizeof (*ddp));
+}
+
+void
+ddt_phys_addref(ddt_phys_t *ddp)
+{
+	ddp->ddp_refcnt++;
+}
+
+void
+ddt_phys_decref(ddt_phys_t *ddp)
+{
+	ASSERT((int64_t)ddp->ddp_refcnt > 0);
+	ddp->ddp_refcnt--;
+}
+
+void
+ddt_phys_free(ddt_t *ddt, ddt_key_t *ddk, ddt_phys_t *ddp, uint64_t txg)
+{
+	blkptr_t blk;
+
+	ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
+	ddt_phys_clear(ddp);
+	zio_free(ddt->ddt_spa, txg, &blk);
+}
+
+ddt_phys_t *
+ddt_phys_select(const ddt_entry_t *dde, const blkptr_t *bp)
+{
+	ddt_phys_t *ddp = (ddt_phys_t *)dde->dde_phys;
+
+	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
+		if (DVA_EQUAL(BP_IDENTITY(bp), &ddp->ddp_dva[0]) &&
+		    BP_PHYSICAL_BIRTH(bp) == ddp->ddp_phys_birth)
+			return (ddp);
+	}
+	return (NULL);
+}
+
+uint64_t
+ddt_phys_total_refcnt(const ddt_entry_t *dde)
+{
+	uint64_t refcnt = 0;
+
+	for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++)
+		refcnt += dde->dde_phys[p].ddp_refcnt;
+
+	return (refcnt);
+}
+
+static void
+ddt_stat_generate(ddt_t *ddt, ddt_entry_t *dde, ddt_stat_t *dds)
+{
+	spa_t *spa = ddt->ddt_spa;
+	ddt_phys_t *ddp = dde->dde_phys;
+	ddt_key_t *ddk = &dde->dde_key;
+	uint64_t lsize = DDK_GET_LSIZE(ddk);
+	uint64_t psize = DDK_GET_PSIZE(ddk);
+
+	bzero(dds, sizeof (*dds));
+
+	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
+		uint64_t dsize = 0;
+		uint64_t refcnt = ddp->ddp_refcnt;
+
+		if (ddp->ddp_phys_birth == 0)
+			continue;
+
+		for (int d = 0; d < SPA_DVAS_PER_BP; d++)
+			dsize += dva_get_dsize_sync(spa, &ddp->ddp_dva[d]);
+
+		dds->dds_blocks += 1;
+		dds->dds_lsize += lsize;
+		dds->dds_psize += psize;
+		dds->dds_dsize += dsize;
+
+		dds->dds_ref_blocks += refcnt;
+		dds->dds_ref_lsize += lsize * refcnt;
+		dds->dds_ref_psize += psize * refcnt;
+		dds->dds_ref_dsize += dsize * refcnt;
+	}
+}
+
+void
+ddt_stat_add(ddt_stat_t *dst, const ddt_stat_t *src, uint64_t neg)
+{
+	const uint64_t *s = (const uint64_t *)src;
+	uint64_t *d = (uint64_t *)dst;
+	uint64_t *d_end = (uint64_t *)(dst + 1);
+
+	ASSERT(neg == 0 || neg == -1ULL);	/* add or subtract */
+
+	while (d < d_end)
+		*d++ += (*s++ ^ neg) - neg;
+}
+
+static void
+ddt_stat_update(ddt_t *ddt, ddt_entry_t *dde, uint64_t neg)
+{
+	ddt_stat_t dds;
+	ddt_histogram_t *ddh;
+	int bucket;
+
+	ddt_stat_generate(ddt, dde, &dds);
+
+	bucket = highbit(dds.dds_ref_blocks) - 1;
+	ASSERT(bucket >= 0);
+
+	ddh = &ddt->ddt_histogram[dde->dde_type][dde->dde_class];
+
+	ddt_stat_add(&ddh->ddh_stat[bucket], &dds, neg);
+}
+
+void
+ddt_histogram_add(ddt_histogram_t *dst, const ddt_histogram_t *src)
+{
+	for (int h = 0; h < 64; h++)
+		ddt_stat_add(&dst->ddh_stat[h], &src->ddh_stat[h], 0);
+}
+
+void
+ddt_histogram_stat(ddt_stat_t *dds, const ddt_histogram_t *ddh)
+{
+	bzero(dds, sizeof (*dds));
+
+	for (int h = 0; h < 64; h++)
+		ddt_stat_add(dds, &ddh->ddh_stat[h], 0);
+}
+
+boolean_t
+ddt_histogram_empty(const ddt_histogram_t *ddh)
+{
+	const uint64_t *s = (const uint64_t *)ddh;
+	const uint64_t *s_end = (const uint64_t *)(ddh + 1);
+
+	while (s < s_end)
+		if (*s++ != 0)
+			return (B_FALSE);
+
+	return (B_TRUE);
+}
+
+void
+ddt_get_dedup_object_stats(spa_t *spa, ddt_object_t *ddo_total)
+{
+	/* Sum the statistics we cached in ddt_object_sync(). */
+	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
+		ddt_t *ddt = spa->spa_ddt[c];
+		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
+			for (enum ddt_class class = 0; class < DDT_CLASSES;
+			    class++) {
+				ddt_object_t *ddo =
+				    &ddt->ddt_object_stats[type][class];
+				ddo_total->ddo_count += ddo->ddo_count;
+				ddo_total->ddo_dspace += ddo->ddo_dspace;
+				ddo_total->ddo_mspace += ddo->ddo_mspace;
+			}
+		}
+	}
+
+	/* ... and compute the averages. */
+	if (ddo_total->ddo_count != 0) {
+		ddo_total->ddo_dspace /= ddo_total->ddo_count;
+		ddo_total->ddo_mspace /= ddo_total->ddo_count;
+	}
+}
+
+void
+ddt_get_dedup_histogram(spa_t *spa, ddt_histogram_t *ddh)
+{
+	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
+		ddt_t *ddt = spa->spa_ddt[c];
+		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
+			for (enum ddt_class class = 0; class < DDT_CLASSES;
+			    class++) {
+				ddt_histogram_add(ddh,
+				    &ddt->ddt_histogram_cache[type][class]);
+			}
+		}
+	}
+}
+
+void
+ddt_get_dedup_stats(spa_t *spa, ddt_stat_t *dds_total)
+{
+	ddt_histogram_t *ddh_total;
+
+	ddh_total = kmem_zalloc(sizeof (ddt_histogram_t), KM_SLEEP);
+	ddt_get_dedup_histogram(spa, ddh_total);
+	ddt_histogram_stat(dds_total, ddh_total);
+	kmem_free(ddh_total, sizeof (ddt_histogram_t));
+}
+
+uint64_t
+ddt_get_dedup_dspace(spa_t *spa)
+{
+	ddt_stat_t dds_total = { 0 };
+
+	ddt_get_dedup_stats(spa, &dds_total);
+	return (dds_total.dds_ref_dsize - dds_total.dds_dsize);
+}
+
+uint64_t
+ddt_get_pool_dedup_ratio(spa_t *spa)
+{
+	ddt_stat_t dds_total = { 0 };
+
+	ddt_get_dedup_stats(spa, &dds_total);
+	if (dds_total.dds_dsize == 0)
+		return (100);
+
+	return (dds_total.dds_ref_dsize * 100 / dds_total.dds_dsize);
+}
+
+int
+ddt_ditto_copies_needed(ddt_t *ddt, ddt_entry_t *dde, ddt_phys_t *ddp_willref)
+{
+	spa_t *spa = ddt->ddt_spa;
+	uint64_t total_refcnt = 0;
+	uint64_t ditto = spa->spa_dedup_ditto;
+	int total_copies = 0;
+	int desired_copies = 0;
+
+	for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) {
+		ddt_phys_t *ddp = &dde->dde_phys[p];
+		zio_t *zio = dde->dde_lead_zio[p];
+		uint64_t refcnt = ddp->ddp_refcnt;	/* committed refs */
+		if (zio != NULL)
+			refcnt += zio->io_parent_count;	/* pending refs */
+		if (ddp == ddp_willref)
+			refcnt++;			/* caller's ref */
+		if (refcnt != 0) {
+			total_refcnt += refcnt;
+			total_copies += p;
+		}
+	}
+
+	if (ditto == 0 || ditto > UINT32_MAX)
+		ditto = UINT32_MAX;
+
+	if (total_refcnt >= 1)
+		desired_copies++;
+	if (total_refcnt >= ditto)
+		desired_copies++;
+	if (total_refcnt >= ditto * ditto)
+		desired_copies++;
+
+	return (MAX(desired_copies, total_copies) - total_copies);
+}
+
+int
+ddt_ditto_copies_present(ddt_entry_t *dde)
+{
+	ddt_phys_t *ddp = &dde->dde_phys[DDT_PHYS_DITTO];
+	dva_t *dva = ddp->ddp_dva;
+	int copies = 0 - DVA_GET_GANG(dva);
+
+	for (int d = 0; d < SPA_DVAS_PER_BP; d++, dva++)
+		if (DVA_IS_VALID(dva))
+			copies++;
+
+	ASSERT(copies >= 0 && copies < SPA_DVAS_PER_BP);
+
+	return (copies);
+}
+
+size_t
+ddt_compress(void *src, uchar_t *dst, size_t s_len, size_t d_len)
+{
+	uchar_t *version = dst++;
+	int cpfunc = ZIO_COMPRESS_ZLE;
+	zio_compress_info_t *ci = &zio_compress_table[cpfunc];
+	size_t c_len;
+
+	ASSERT(d_len >= s_len + 1);	/* no compression plus version byte */
+
+	c_len = ci->ci_compress(src, dst, s_len, d_len - 1, ci->ci_level);
+
+	if (c_len == s_len) {
+		cpfunc = ZIO_COMPRESS_OFF;
+		bcopy(src, dst, s_len);
+	}
+
+	*version = (ZFS_HOST_BYTEORDER & DDT_COMPRESS_BYTEORDER_MASK) | cpfunc;
+
+	return (c_len + 1);
+}
+
+void
+ddt_decompress(uchar_t *src, void *dst, size_t s_len, size_t d_len)
+{
+	uchar_t version = *src++;
+	int cpfunc = version & DDT_COMPRESS_FUNCTION_MASK;
+	zio_compress_info_t *ci = &zio_compress_table[cpfunc];
+
+	if (ci->ci_decompress != NULL)
+		(void) ci->ci_decompress(src, dst, s_len, d_len, ci->ci_level);
+	else
+		bcopy(src, dst, d_len);
+
+	if ((version ^ ZFS_HOST_BYTEORDER) & DDT_COMPRESS_BYTEORDER_MASK)
+		byteswap_uint64_array(dst, d_len);
+}
+
+ddt_t *
+ddt_select_by_checksum(spa_t *spa, enum zio_checksum c)
+{
+	return (spa->spa_ddt[c]);
+}
+
+ddt_t *
+ddt_select(spa_t *spa, const blkptr_t *bp)
+{
+	return (spa->spa_ddt[BP_GET_CHECKSUM(bp)]);
+}
+
+void
+ddt_enter(ddt_t *ddt)
+{
+	mutex_enter(&ddt->ddt_lock);
+}
+
+void
+ddt_exit(ddt_t *ddt)
+{
+	mutex_exit(&ddt->ddt_lock);
+}
+
+static ddt_entry_t *
+ddt_alloc(const ddt_key_t *ddk)
+{
+	ddt_entry_t *dde;
+
+	dde = kmem_zalloc(sizeof (ddt_entry_t), KM_SLEEP);
+	cv_init(&dde->dde_cv, NULL, CV_DEFAULT, NULL);
+
+	dde->dde_key = *ddk;
+
+	return (dde);
+}
+
+static void
+ddt_free(ddt_entry_t *dde)
+{
+	ASSERT(!dde->dde_loading);
+
+	for (int p = 0; p < DDT_PHYS_TYPES; p++)
+		ASSERT(dde->dde_lead_zio[p] == NULL);
+
+	if (dde->dde_repair_data != NULL)
+		zio_buf_free(dde->dde_repair_data,
+		    DDK_GET_PSIZE(&dde->dde_key));
+
+	cv_destroy(&dde->dde_cv);
+	kmem_free(dde, sizeof (*dde));
+}
+
+void
+ddt_remove(ddt_t *ddt, ddt_entry_t *dde)
+{
+	ASSERT(MUTEX_HELD(&ddt->ddt_lock));
+
+	avl_remove(&ddt->ddt_tree, dde);
+	ddt_free(dde);
+}
+
+ddt_entry_t *
+ddt_lookup(ddt_t *ddt, const blkptr_t *bp, boolean_t add)
+{
+	ddt_entry_t *dde, dde_search;
+	enum ddt_type type;
+	enum ddt_class class;
+	avl_index_t where;
+	int error;
+
+	ASSERT(MUTEX_HELD(&ddt->ddt_lock));
+
+	ddt_key_fill(&dde_search.dde_key, bp);
+
+	dde = avl_find(&ddt->ddt_tree, &dde_search, &where);
+	if (dde == NULL) {
+		if (!add)
+			return (NULL);
+		dde = ddt_alloc(&dde_search.dde_key);
+		avl_insert(&ddt->ddt_tree, dde, where);
+	}
+
+	while (dde->dde_loading)
+		cv_wait(&dde->dde_cv, &ddt->ddt_lock);
+
+	if (dde->dde_loaded)
+		return (dde);
+
+	dde->dde_loading = B_TRUE;
+
+	ddt_exit(ddt);
+
+	error = ENOENT;
+
+	for (type = 0; type < DDT_TYPES; type++) {
+		for (class = 0; class < DDT_CLASSES; class++) {
+			error = ddt_object_lookup(ddt, type, class, dde);
+			if (error != ENOENT)
+				break;
+		}
+		if (error != ENOENT)
+			break;
+	}
+
+	ASSERT(error == 0 || error == ENOENT);
+
+	ddt_enter(ddt);
+
+	ASSERT(dde->dde_loaded == B_FALSE);
+	ASSERT(dde->dde_loading == B_TRUE);
+
+	dde->dde_type = type;	/* will be DDT_TYPES if no entry found */
+	dde->dde_class = class;	/* will be DDT_CLASSES if no entry found */
+	dde->dde_loaded = B_TRUE;
+	dde->dde_loading = B_FALSE;
+
+	if (error == 0)
+		ddt_stat_update(ddt, dde, -1ULL);
+
+	cv_broadcast(&dde->dde_cv);
+
+	return (dde);
+}
+
+void
+ddt_prefetch(spa_t *spa, const blkptr_t *bp)
+{
+	ddt_t *ddt;
+	ddt_entry_t dde;
+
+	if (!zfs_dedup_prefetch || bp == NULL || !BP_GET_DEDUP(bp))
+		return;
+
+	/*
+	 * We only remove the DDT once all tables are empty and only
+	 * prefetch dedup blocks when there are entries in the DDT.
+	 * Thus no locking is required as the DDT can't disappear on us.
+	 */
+	ddt = ddt_select(spa, bp);
+	ddt_key_fill(&dde.dde_key, bp);
+
+	for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
+		for (enum ddt_class class = 0; class < DDT_CLASSES; class++) {
+			ddt_object_prefetch(ddt, type, class, &dde);
+		}
+	}
+}
+
+int
+ddt_entry_compare(const void *x1, const void *x2)
+{
+	const ddt_entry_t *dde1 = x1;
+	const ddt_entry_t *dde2 = x2;
+	const uint64_t *u1 = (const uint64_t *)&dde1->dde_key;
+	const uint64_t *u2 = (const uint64_t *)&dde2->dde_key;
+
+	for (int i = 0; i < DDT_KEY_WORDS; i++) {
+		if (u1[i] < u2[i])
+			return (-1);
+		if (u1[i] > u2[i])
+			return (1);
+	}
+
+	return (0);
+}
+
+static ddt_t *
+ddt_table_alloc(spa_t *spa, enum zio_checksum c)
+{
+	ddt_t *ddt;
+
+	ddt = kmem_zalloc(sizeof (*ddt), KM_SLEEP);
+
+	mutex_init(&ddt->ddt_lock, NULL, MUTEX_DEFAULT, NULL);
+	avl_create(&ddt->ddt_tree, ddt_entry_compare,
+	    sizeof (ddt_entry_t), offsetof(ddt_entry_t, dde_node));
+	avl_create(&ddt->ddt_repair_tree, ddt_entry_compare,
+	    sizeof (ddt_entry_t), offsetof(ddt_entry_t, dde_node));
+	ddt->ddt_checksum = c;
+	ddt->ddt_spa = spa;
+	ddt->ddt_os = spa->spa_meta_objset;
+
+	return (ddt);
+}
+
+static void
+ddt_table_free(ddt_t *ddt)
+{
+	ASSERT(avl_numnodes(&ddt->ddt_tree) == 0);
+	ASSERT(avl_numnodes(&ddt->ddt_repair_tree) == 0);
+	avl_destroy(&ddt->ddt_tree);
+	avl_destroy(&ddt->ddt_repair_tree);
+	mutex_destroy(&ddt->ddt_lock);
+	kmem_free(ddt, sizeof (*ddt));
+}
+
+void
+ddt_create(spa_t *spa)
+{
+	spa->spa_dedup_checksum = ZIO_DEDUPCHECKSUM;
+
+	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++)
+		spa->spa_ddt[c] = ddt_table_alloc(spa, c);
+}
+
+int
+ddt_load(spa_t *spa)
+{
+	int error;
+
+	ddt_create(spa);
+
+	error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+	    DMU_POOL_DDT_STATS, sizeof (uint64_t), 1,
+	    &spa->spa_ddt_stat_object);
+
+	if (error)
+		return (error == ENOENT ? 0 : error);
+
+	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
+		ddt_t *ddt = spa->spa_ddt[c];
+		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
+			for (enum ddt_class class = 0; class < DDT_CLASSES;
+			    class++) {
+				error = ddt_object_load(ddt, type, class);
+				if (error != 0 && error != ENOENT)
+					return (error);
+			}
+		}
+
+		/*
+		 * Seed the cached histograms.
+		 */
+		bcopy(ddt->ddt_histogram, &ddt->ddt_histogram_cache,
+		    sizeof (ddt->ddt_histogram));
+	}
+
+	return (0);
+}
+
+void
+ddt_unload(spa_t *spa)
+{
+	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
+		if (spa->spa_ddt[c]) {
+			ddt_table_free(spa->spa_ddt[c]);
+			spa->spa_ddt[c] = NULL;
+		}
+	}
+}
+
+boolean_t
+ddt_class_contains(spa_t *spa, enum ddt_class max_class, const blkptr_t *bp)
+{
+	ddt_t *ddt;
+	ddt_entry_t dde;
+
+	if (!BP_GET_DEDUP(bp))
+		return (B_FALSE);
+
+	if (max_class == DDT_CLASS_UNIQUE)
+		return (B_TRUE);
+
+	ddt = spa->spa_ddt[BP_GET_CHECKSUM(bp)];
+
+	ddt_key_fill(&dde.dde_key, bp);
+
+	for (enum ddt_type type = 0; type < DDT_TYPES; type++)
+		for (enum ddt_class class = 0; class <= max_class; class++)
+			if (ddt_object_lookup(ddt, type, class, &dde) == 0)
+				return (B_TRUE);
+
+	return (B_FALSE);
+}
+
+ddt_entry_t *
+ddt_repair_start(ddt_t *ddt, const blkptr_t *bp)
+{
+	ddt_key_t ddk;
+	ddt_entry_t *dde;
+
+	ddt_key_fill(&ddk, bp);
+
+	dde = ddt_alloc(&ddk);
+
+	for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
+		for (enum ddt_class class = 0; class < DDT_CLASSES; class++) {
+			/*
+			 * We can only do repair if there are multiple copies
+			 * of the block.  For anything in the UNIQUE class,
+			 * there's definitely only one copy, so don't even try.
+			 */
+			if (class != DDT_CLASS_UNIQUE &&
+			    ddt_object_lookup(ddt, type, class, dde) == 0)
+				return (dde);
+		}
+	}
+
+	bzero(dde->dde_phys, sizeof (dde->dde_phys));
+
+	return (dde);
+}
+
+void
+ddt_repair_done(ddt_t *ddt, ddt_entry_t *dde)
+{
+	avl_index_t where;
+
+	ddt_enter(ddt);
+
+	if (dde->dde_repair_data != NULL && spa_writeable(ddt->ddt_spa) &&
+	    avl_find(&ddt->ddt_repair_tree, dde, &where) == NULL)
+		avl_insert(&ddt->ddt_repair_tree, dde, where);
+	else
+		ddt_free(dde);
+
+	ddt_exit(ddt);
+}
+
+static void
+ddt_repair_entry_done(zio_t *zio)
+{
+	ddt_entry_t *rdde = zio->io_private;
+
+	ddt_free(rdde);
+}
+
+static void
+ddt_repair_entry(ddt_t *ddt, ddt_entry_t *dde, ddt_entry_t *rdde, zio_t *rio)
+{
+	ddt_phys_t *ddp = dde->dde_phys;
+	ddt_phys_t *rddp = rdde->dde_phys;
+	ddt_key_t *ddk = &dde->dde_key;
+	ddt_key_t *rddk = &rdde->dde_key;
+	zio_t *zio;
+	blkptr_t blk;
+
+	zio = zio_null(rio, rio->io_spa, NULL,
+	    ddt_repair_entry_done, rdde, rio->io_flags);
+
+	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++, rddp++) {
+		if (ddp->ddp_phys_birth == 0 ||
+		    ddp->ddp_phys_birth != rddp->ddp_phys_birth ||
+		    bcmp(ddp->ddp_dva, rddp->ddp_dva, sizeof (ddp->ddp_dva)))
+			continue;
+		ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
+		zio_nowait(zio_rewrite(zio, zio->io_spa, 0, &blk,
+		    rdde->dde_repair_data, DDK_GET_PSIZE(rddk), NULL, NULL,
+		    ZIO_PRIORITY_SYNC_WRITE, ZIO_DDT_CHILD_FLAGS(zio), NULL));
+	}
+
+	zio_nowait(zio);
+}
+
+static void
+ddt_repair_table(ddt_t *ddt, zio_t *rio)
+{
+	spa_t *spa = ddt->ddt_spa;
+	ddt_entry_t *dde, *rdde_next, *rdde;
+	avl_tree_t *t = &ddt->ddt_repair_tree;
+	blkptr_t blk;
+
+	if (spa_sync_pass(spa) > 1)
+		return;
+
+	ddt_enter(ddt);
+	for (rdde = avl_first(t); rdde != NULL; rdde = rdde_next) {
+		rdde_next = AVL_NEXT(t, rdde);
+		avl_remove(&ddt->ddt_repair_tree, rdde);
+		ddt_exit(ddt);
+		ddt_bp_create(ddt->ddt_checksum, &rdde->dde_key, NULL, &blk);
+		dde = ddt_repair_start(ddt, &blk);
+		ddt_repair_entry(ddt, dde, rdde, rio);
+		ddt_repair_done(ddt, dde);
+		ddt_enter(ddt);
+	}
+	ddt_exit(ddt);
+}
+
+static void
+ddt_sync_entry(ddt_t *ddt, ddt_entry_t *dde, dmu_tx_t *tx, uint64_t txg)
+{
+	dsl_pool_t *dp = ddt->ddt_spa->spa_dsl_pool;
+	ddt_phys_t *ddp = dde->dde_phys;
+	ddt_key_t *ddk = &dde->dde_key;
+	enum ddt_type otype = dde->dde_type;
+	enum ddt_type ntype = DDT_TYPE_CURRENT;
+	enum ddt_class oclass = dde->dde_class;
+	enum ddt_class nclass;
+	uint64_t total_refcnt = 0;
+
+	ASSERT(dde->dde_loaded);
+	ASSERT(!dde->dde_loading);
+
+	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
+		ASSERT(dde->dde_lead_zio[p] == NULL);
+		ASSERT((int64_t)ddp->ddp_refcnt >= 0);
+		if (ddp->ddp_phys_birth == 0) {
+			ASSERT(ddp->ddp_refcnt == 0);
+			continue;
+		}
+		if (p == DDT_PHYS_DITTO) {
+			if (ddt_ditto_copies_needed(ddt, dde, NULL) == 0)
+				ddt_phys_free(ddt, ddk, ddp, txg);
+			continue;
+		}
+		if (ddp->ddp_refcnt == 0)
+			ddt_phys_free(ddt, ddk, ddp, txg);
+		total_refcnt += ddp->ddp_refcnt;
+	}
+
+	if (dde->dde_phys[DDT_PHYS_DITTO].ddp_phys_birth != 0)
+		nclass = DDT_CLASS_DITTO;
+	else if (total_refcnt > 1)
+		nclass = DDT_CLASS_DUPLICATE;
+	else
+		nclass = DDT_CLASS_UNIQUE;
+
+	if (otype != DDT_TYPES &&
+	    (otype != ntype || oclass != nclass || total_refcnt == 0)) {
+		VERIFY(ddt_object_remove(ddt, otype, oclass, dde, tx) == 0);
+		ASSERT(ddt_object_lookup(ddt, otype, oclass, dde) == ENOENT);
+	}
+
+	if (total_refcnt != 0) {
+		dde->dde_type = ntype;
+		dde->dde_class = nclass;
+		ddt_stat_update(ddt, dde, 0);
+		if (!ddt_object_exists(ddt, ntype, nclass))
+			ddt_object_create(ddt, ntype, nclass, tx);
+		VERIFY(ddt_object_update(ddt, ntype, nclass, dde, tx) == 0);
+
+		/*
+		 * If the class changes, the order that we scan this bp
+		 * changes.  If it decreases, we could miss it, so
+		 * scan it right now.  (This covers both class changing
+		 * while we are doing ddt_walk(), and when we are
+		 * traversing.)
+		 */
+		if (nclass < oclass) {
+			dsl_scan_ddt_entry(dp->dp_scan,
+			    ddt->ddt_checksum, dde, tx);
+		}
+	}
+}
+
+static void
+ddt_sync_table(ddt_t *ddt, dmu_tx_t *tx, uint64_t txg)
+{
+	spa_t *spa = ddt->ddt_spa;
+	ddt_entry_t *dde;
+	void *cookie = NULL;
+
+	if (avl_numnodes(&ddt->ddt_tree) == 0)
+		return;
+
+	ASSERT(spa->spa_uberblock.ub_version >= SPA_VERSION_DEDUP);
+
+	if (spa->spa_ddt_stat_object == 0) {
+		spa->spa_ddt_stat_object = zap_create(ddt->ddt_os,
+		    DMU_OT_DDT_STATS, DMU_OT_NONE, 0, tx);
+		VERIFY(zap_add(ddt->ddt_os, DMU_POOL_DIRECTORY_OBJECT,
+		    DMU_POOL_DDT_STATS, sizeof (uint64_t), 1,
+		    &spa->spa_ddt_stat_object, tx) == 0);
+	}
+
+	while ((dde = avl_destroy_nodes(&ddt->ddt_tree, &cookie)) != NULL) {
+		ddt_sync_entry(ddt, dde, tx, txg);
+		ddt_free(dde);
+	}
+
+	for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
+		uint64_t count = 0;
+		for (enum ddt_class class = 0; class < DDT_CLASSES; class++) {
+			if (ddt_object_exists(ddt, type, class)) {
+				ddt_object_sync(ddt, type, class, tx);
+				count += ddt_object_count(ddt, type, class);
+			}
+		}
+		for (enum ddt_class class = 0; class < DDT_CLASSES; class++) {
+			if (count == 0 && ddt_object_exists(ddt, type, class))
+				ddt_object_destroy(ddt, type, class, tx);
+		}
+	}
+
+	bcopy(ddt->ddt_histogram, &ddt->ddt_histogram_cache,
+	    sizeof (ddt->ddt_histogram));
+}
+
+void
+ddt_sync(spa_t *spa, uint64_t txg)
+{
+	dmu_tx_t *tx;
+	zio_t *rio = zio_root(spa, NULL, NULL,
+	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
+
+	ASSERT(spa_syncing_txg(spa) == txg);
+
+	tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg);
+
+	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
+		ddt_t *ddt = spa->spa_ddt[c];
+		if (ddt == NULL)
+			continue;
+		ddt_sync_table(ddt, tx, txg);
+		ddt_repair_table(ddt, rio);
+	}
+
+	(void) zio_wait(rio);
+
+	dmu_tx_commit(tx);
+}
+
+int
+ddt_walk(spa_t *spa, ddt_bookmark_t *ddb, ddt_entry_t *dde)
+{
+	do {
+		do {
+			do {
+				ddt_t *ddt = spa->spa_ddt[ddb->ddb_checksum];
+				int error = ENOENT;
+				if (ddt_object_exists(ddt, ddb->ddb_type,
+				    ddb->ddb_class)) {
+					error = ddt_object_walk(ddt,
+					    ddb->ddb_type, ddb->ddb_class,
+					    &ddb->ddb_cursor, dde);
+				}
+				dde->dde_type = ddb->ddb_type;
+				dde->dde_class = ddb->ddb_class;
+				if (error == 0)
+					return (0);
+				if (error != ENOENT)
+					return (error);
+				ddb->ddb_cursor = 0;
+			} while (++ddb->ddb_checksum < ZIO_CHECKSUM_FUNCTIONS);
+			ddb->ddb_checksum = 0;
+		} while (++ddb->ddb_type < DDT_TYPES);
+		ddb->ddb_type = 0;
+	} while (++ddb->ddb_class < DDT_CLASSES);
+
+	return (ENOENT);
+}
diff --git a/uts/common/fs/zfs/ddt_zap.c b/uts/common/fs/zfs/ddt_zap.c
new file mode 100644
index 000000000000..d6a991c7c19e
--- /dev/null
+++ b/uts/common/fs/zfs/ddt_zap.c
@@ -0,0 +1,157 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/zio.h>
+#include <sys/ddt.h>
+#include <sys/zap.h>
+#include <sys/dmu_tx.h>
+#include <util/sscanf.h>
+
+int ddt_zap_leaf_blockshift = 12;
+int ddt_zap_indirect_blockshift = 12;
+
+static int
+ddt_zap_create(objset_t *os, uint64_t *objectp, dmu_tx_t *tx, boolean_t prehash)
+{
+	zap_flags_t flags = ZAP_FLAG_HASH64 | ZAP_FLAG_UINT64_KEY;
+
+	if (prehash)
+		flags |= ZAP_FLAG_PRE_HASHED_KEY;
+
+	*objectp = zap_create_flags(os, 0, flags, DMU_OT_DDT_ZAP,
+	    ddt_zap_leaf_blockshift, ddt_zap_indirect_blockshift,
+	    DMU_OT_NONE, 0, tx);
+
+	return (*objectp == 0 ? ENOTSUP : 0);
+}
+
+static int
+ddt_zap_destroy(objset_t *os, uint64_t object, dmu_tx_t *tx)
+{
+	return (zap_destroy(os, object, tx));
+}
+
+static int
+ddt_zap_lookup(objset_t *os, uint64_t object, ddt_entry_t *dde)
+{
+	uchar_t cbuf[sizeof (dde->dde_phys) + 1];
+	uint64_t one, csize;
+	int error;
+
+	error = zap_length_uint64(os, object, (uint64_t *)&dde->dde_key,
+	    DDT_KEY_WORDS, &one, &csize);
+	if (error)
+		return (error);
+
+	ASSERT(one == 1);
+	ASSERT(csize <= sizeof (cbuf));
+
+	error = zap_lookup_uint64(os, object, (uint64_t *)&dde->dde_key,
+	    DDT_KEY_WORDS, 1, csize, cbuf);
+	if (error)
+		return (error);
+
+	ddt_decompress(cbuf, dde->dde_phys, csize, sizeof (dde->dde_phys));
+
+	return (0);
+}
+
+static void
+ddt_zap_prefetch(objset_t *os, uint64_t object, ddt_entry_t *dde)
+{
+	(void) zap_prefetch_uint64(os, object, (uint64_t *)&dde->dde_key,
+	    DDT_KEY_WORDS);
+}
+
+static int
+ddt_zap_update(objset_t *os, uint64_t object, ddt_entry_t *dde, dmu_tx_t *tx)
+{
+	uchar_t cbuf[sizeof (dde->dde_phys) + 1];
+	uint64_t csize;
+
+	csize = ddt_compress(dde->dde_phys, cbuf,
+	    sizeof (dde->dde_phys), sizeof (cbuf));
+
+	return (zap_update_uint64(os, object, (uint64_t *)&dde->dde_key,
+	    DDT_KEY_WORDS, 1, csize, cbuf, tx));
+}
+
+static int
+ddt_zap_remove(objset_t *os, uint64_t object, ddt_entry_t *dde, dmu_tx_t *tx)
+{
+	return (zap_remove_uint64(os, object, (uint64_t *)&dde->dde_key,
+	    DDT_KEY_WORDS, tx));
+}
+
+static int
+ddt_zap_walk(objset_t *os, uint64_t object, ddt_entry_t *dde, uint64_t *walk)
+{
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	int error;
+
+	zap_cursor_init_serialized(&zc, os, object, *walk);
+	if ((error = zap_cursor_retrieve(&zc, &za)) == 0) {
+		uchar_t cbuf[sizeof (dde->dde_phys) + 1];
+		uint64_t csize = za.za_num_integers;
+		ASSERT(za.za_integer_length == 1);
+		error = zap_lookup_uint64(os, object, (uint64_t *)za.za_name,
+		    DDT_KEY_WORDS, 1, csize, cbuf);
+		ASSERT(error == 0);
+		if (error == 0) {
+			ddt_decompress(cbuf, dde->dde_phys, csize,
+			    sizeof (dde->dde_phys));
+			dde->dde_key = *(ddt_key_t *)za.za_name;
+		}
+		zap_cursor_advance(&zc);
+		*walk = zap_cursor_serialize(&zc);
+	}
+	zap_cursor_fini(&zc);
+	return (error);
+}
+
+static uint64_t
+ddt_zap_count(objset_t *os, uint64_t object)
+{
+	uint64_t count = 0;
+
+	VERIFY(zap_count(os, object, &count) == 0);
+
+	return (count);
+}
+
+const ddt_ops_t ddt_zap_ops = {
+	"zap",
+	ddt_zap_create,
+	ddt_zap_destroy,
+	ddt_zap_lookup,
+	ddt_zap_prefetch,
+	ddt_zap_update,
+	ddt_zap_remove,
+	ddt_zap_walk,
+	ddt_zap_count,
+};
diff --git a/uts/common/fs/zfs/dmu.c b/uts/common/fs/zfs/dmu.c
new file mode 100644
index 000000000000..39234eba53b2
--- /dev/null
+++ b/uts/common/fs/zfs/dmu.c
@@ -0,0 +1,1764 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/dmu.h>
+#include <sys/dmu_impl.h>
+#include <sys/dmu_tx.h>
+#include <sys/dbuf.h>
+#include <sys/dnode.h>
+#include <sys/zfs_context.h>
+#include <sys/dmu_objset.h>
+#include <sys/dmu_traverse.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_pool.h>
+#include <sys/dsl_synctask.h>
+#include <sys/dsl_prop.h>
+#include <sys/dmu_zfetch.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/zap.h>
+#include <sys/zio_checksum.h>
+#include <sys/sa.h>
+#ifdef _KERNEL
+#include <sys/vmsystm.h>
+#include <sys/zfs_znode.h>
+#endif
+
+const dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES] = {
+	{	byteswap_uint8_array,	TRUE,	"unallocated"		},
+	{	zap_byteswap,		TRUE,	"object directory"	},
+	{	byteswap_uint64_array,	TRUE,	"object array"		},
+	{	byteswap_uint8_array,	TRUE,	"packed nvlist"		},
+	{	byteswap_uint64_array,	TRUE,	"packed nvlist size"	},
+	{	byteswap_uint64_array,	TRUE,	"bpobj"			},
+	{	byteswap_uint64_array,	TRUE,	"bpobj header"		},
+	{	byteswap_uint64_array,	TRUE,	"SPA space map header"	},
+	{	byteswap_uint64_array,	TRUE,	"SPA space map"		},
+	{	byteswap_uint64_array,	TRUE,	"ZIL intent log"	},
+	{	dnode_buf_byteswap,	TRUE,	"DMU dnode"		},
+	{	dmu_objset_byteswap,	TRUE,	"DMU objset"		},
+	{	byteswap_uint64_array,	TRUE,	"DSL directory"		},
+	{	zap_byteswap,		TRUE,	"DSL directory child map"},
+	{	zap_byteswap,		TRUE,	"DSL dataset snap map"	},
+	{	zap_byteswap,		TRUE,	"DSL props"		},
+	{	byteswap_uint64_array,	TRUE,	"DSL dataset"		},
+	{	zfs_znode_byteswap,	TRUE,	"ZFS znode"		},
+	{	zfs_oldacl_byteswap,	TRUE,	"ZFS V0 ACL"		},
+	{	byteswap_uint8_array,	FALSE,	"ZFS plain file"	},
+	{	zap_byteswap,		TRUE,	"ZFS directory"		},
+	{	zap_byteswap,		TRUE,	"ZFS master node"	},
+	{	zap_byteswap,		TRUE,	"ZFS delete queue"	},
+	{	byteswap_uint8_array,	FALSE,	"zvol object"		},
+	{	zap_byteswap,		TRUE,	"zvol prop"		},
+	{	byteswap_uint8_array,	FALSE,	"other uint8[]"		},
+	{	byteswap_uint64_array,	FALSE,	"other uint64[]"	},
+	{	zap_byteswap,		TRUE,	"other ZAP"		},
+	{	zap_byteswap,		TRUE,	"persistent error log"	},
+	{	byteswap_uint8_array,	TRUE,	"SPA history"		},
+	{	byteswap_uint64_array,	TRUE,	"SPA history offsets"	},
+	{	zap_byteswap,		TRUE,	"Pool properties"	},
+	{	zap_byteswap,		TRUE,	"DSL permissions"	},
+	{	zfs_acl_byteswap,	TRUE,	"ZFS ACL"		},
+	{	byteswap_uint8_array,	TRUE,	"ZFS SYSACL"		},
+	{	byteswap_uint8_array,	TRUE,	"FUID table"		},
+	{	byteswap_uint64_array,	TRUE,	"FUID table size"	},
+	{	zap_byteswap,		TRUE,	"DSL dataset next clones"},
+	{	zap_byteswap,		TRUE,	"scan work queue"	},
+	{	zap_byteswap,		TRUE,	"ZFS user/group used"	},
+	{	zap_byteswap,		TRUE,	"ZFS user/group quota"	},
+	{	zap_byteswap,		TRUE,	"snapshot refcount tags"},
+	{	zap_byteswap,		TRUE,	"DDT ZAP algorithm"	},
+	{	zap_byteswap,		TRUE,	"DDT statistics"	},
+	{	byteswap_uint8_array,	TRUE,	"System attributes"	},
+	{	zap_byteswap,		TRUE,	"SA master node"	},
+	{	zap_byteswap,		TRUE,	"SA attr registration"	},
+	{	zap_byteswap,		TRUE,	"SA attr layouts"	},
+	{	zap_byteswap,		TRUE,	"scan translations"	},
+	{	byteswap_uint8_array,	FALSE,	"deduplicated block"	},
+	{	zap_byteswap,		TRUE,	"DSL deadlist map"	},
+	{	byteswap_uint64_array,	TRUE,	"DSL deadlist map hdr"	},
+	{	zap_byteswap,		TRUE,	"DSL dir clones"	},
+	{	byteswap_uint64_array,	TRUE,	"bpobj subobj"		},
+};
+
+int
+dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset,
+    void *tag, dmu_buf_t **dbp, int flags)
+{
+	dnode_t *dn;
+	uint64_t blkid;
+	dmu_buf_impl_t *db;
+	int err;
+	int db_flags = DB_RF_CANFAIL;
+
+	if (flags & DMU_READ_NO_PREFETCH)
+		db_flags |= DB_RF_NOPREFETCH;
+
+	err = dnode_hold(os, object, FTAG, &dn);
+	if (err)
+		return (err);
+	blkid = dbuf_whichblock(dn, offset);
+	rw_enter(&dn->dn_struct_rwlock, RW_READER);
+	db = dbuf_hold(dn, blkid, tag);
+	rw_exit(&dn->dn_struct_rwlock);
+	if (db == NULL) {
+		err = EIO;
+	} else {
+		err = dbuf_read(db, NULL, db_flags);
+		if (err) {
+			dbuf_rele(db, tag);
+			db = NULL;
+		}
+	}
+
+	dnode_rele(dn, FTAG);
+	*dbp = &db->db; /* NULL db plus first field offset is NULL */
+	return (err);
+}
+
+int
+dmu_bonus_max(void)
+{
+	return (DN_MAX_BONUSLEN);
+}
+
+int
+dmu_set_bonus(dmu_buf_t *db_fake, int newsize, dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
+	dnode_t *dn;
+	int error;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+
+	if (dn->dn_bonus != db) {
+		error = EINVAL;
+	} else if (newsize < 0 || newsize > db_fake->db_size) {
+		error = EINVAL;
+	} else {
+		dnode_setbonuslen(dn, newsize, tx);
+		error = 0;
+	}
+
+	DB_DNODE_EXIT(db);
+	return (error);
+}
+
+int
+dmu_set_bonustype(dmu_buf_t *db_fake, dmu_object_type_t type, dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
+	dnode_t *dn;
+	int error;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+
+	if (type > DMU_OT_NUMTYPES) {
+		error = EINVAL;
+	} else if (dn->dn_bonus != db) {
+		error = EINVAL;
+	} else {
+		dnode_setbonus_type(dn, type, tx);
+		error = 0;
+	}
+
+	DB_DNODE_EXIT(db);
+	return (error);
+}
+
+dmu_object_type_t
+dmu_get_bonustype(dmu_buf_t *db_fake)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
+	dnode_t *dn;
+	dmu_object_type_t type;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	type = dn->dn_bonustype;
+	DB_DNODE_EXIT(db);
+
+	return (type);
+}
+
+int
+dmu_rm_spill(objset_t *os, uint64_t object, dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	int error;
+
+	error = dnode_hold(os, object, FTAG, &dn);
+	dbuf_rm_spill(dn, tx);
+	rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+	dnode_rm_spill(dn, tx);
+	rw_exit(&dn->dn_struct_rwlock);
+	dnode_rele(dn, FTAG);
+	return (error);
+}
+
+/*
+ * returns ENOENT, EIO, or 0.
+ */
+int
+dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **dbp)
+{
+	dnode_t *dn;
+	dmu_buf_impl_t *db;
+	int error;
+
+	error = dnode_hold(os, object, FTAG, &dn);
+	if (error)
+		return (error);
+
+	rw_enter(&dn->dn_struct_rwlock, RW_READER);
+	if (dn->dn_bonus == NULL) {
+		rw_exit(&dn->dn_struct_rwlock);
+		rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+		if (dn->dn_bonus == NULL)
+			dbuf_create_bonus(dn);
+	}
+	db = dn->dn_bonus;
+
+	/* as long as the bonus buf is held, the dnode will be held */
+	if (refcount_add(&db->db_holds, tag) == 1) {
+		VERIFY(dnode_add_ref(dn, db));
+		(void) atomic_inc_32_nv(&dn->dn_dbufs_count);
+	}
+
+	/*
+	 * Wait to drop dn_struct_rwlock until after adding the bonus dbuf's
+	 * hold and incrementing the dbuf count to ensure that dnode_move() sees
+	 * a dnode hold for every dbuf.
+	 */
+	rw_exit(&dn->dn_struct_rwlock);
+
+	dnode_rele(dn, FTAG);
+
+	VERIFY(0 == dbuf_read(db, NULL, DB_RF_MUST_SUCCEED | DB_RF_NOPREFETCH));
+
+	*dbp = &db->db;
+	return (0);
+}
+
+/*
+ * returns ENOENT, EIO, or 0.
+ *
+ * This interface will allocate a blank spill dbuf when a spill blk
+ * doesn't already exist on the dnode.
+ *
+ * if you only want to find an already existing spill db, then
+ * dmu_spill_hold_existing() should be used.
+ */
+int
+dmu_spill_hold_by_dnode(dnode_t *dn, uint32_t flags, void *tag, dmu_buf_t **dbp)
+{
+	dmu_buf_impl_t *db = NULL;
+	int err;
+
+	if ((flags & DB_RF_HAVESTRUCT) == 0)
+		rw_enter(&dn->dn_struct_rwlock, RW_READER);
+
+	db = dbuf_hold(dn, DMU_SPILL_BLKID, tag);
+
+	if ((flags & DB_RF_HAVESTRUCT) == 0)
+		rw_exit(&dn->dn_struct_rwlock);
+
+	ASSERT(db != NULL);
+	err = dbuf_read(db, NULL, flags);
+	if (err == 0)
+		*dbp = &db->db;
+	else
+		dbuf_rele(db, tag);
+	return (err);
+}
+
+int
+dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)bonus;
+	dnode_t *dn;
+	int err;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+
+	if (spa_version(dn->dn_objset->os_spa) < SPA_VERSION_SA) {
+		err = EINVAL;
+	} else {
+		rw_enter(&dn->dn_struct_rwlock, RW_READER);
+
+		if (!dn->dn_have_spill) {
+			err = ENOENT;
+		} else {
+			err = dmu_spill_hold_by_dnode(dn,
+			    DB_RF_HAVESTRUCT | DB_RF_CANFAIL, tag, dbp);
+		}
+
+		rw_exit(&dn->dn_struct_rwlock);
+	}
+
+	DB_DNODE_EXIT(db);
+	return (err);
+}
+
+int
+dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)bonus;
+	dnode_t *dn;
+	int err;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	err = dmu_spill_hold_by_dnode(dn, DB_RF_CANFAIL, tag, dbp);
+	DB_DNODE_EXIT(db);
+
+	return (err);
+}
+
+/*
+ * Note: longer-term, we should modify all of the dmu_buf_*() interfaces
+ * to take a held dnode rather than <os, object> -- the lookup is wasteful,
+ * and can induce severe lock contention when writing to several files
+ * whose dnodes are in the same block.
+ */
+static int
+dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset, uint64_t length,
+    int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp, uint32_t flags)
+{
+	dsl_pool_t *dp = NULL;
+	dmu_buf_t **dbp;
+	uint64_t blkid, nblks, i;
+	uint32_t dbuf_flags;
+	int err;
+	zio_t *zio;
+	hrtime_t start;
+
+	ASSERT(length <= DMU_MAX_ACCESS);
+
+	dbuf_flags = DB_RF_CANFAIL | DB_RF_NEVERWAIT | DB_RF_HAVESTRUCT;
+	if (flags & DMU_READ_NO_PREFETCH || length > zfetch_array_rd_sz)
+		dbuf_flags |= DB_RF_NOPREFETCH;
+
+	rw_enter(&dn->dn_struct_rwlock, RW_READER);
+	if (dn->dn_datablkshift) {
+		int blkshift = dn->dn_datablkshift;
+		nblks = (P2ROUNDUP(offset+length, 1ULL<<blkshift) -
+		    P2ALIGN(offset, 1ULL<<blkshift)) >> blkshift;
+	} else {
+		if (offset + length > dn->dn_datablksz) {
+			zfs_panic_recover("zfs: accessing past end of object "
+			    "%llx/%llx (size=%u access=%llu+%llu)",
+			    (longlong_t)dn->dn_objset->
+			    os_dsl_dataset->ds_object,
+			    (longlong_t)dn->dn_object, dn->dn_datablksz,
+			    (longlong_t)offset, (longlong_t)length);
+			rw_exit(&dn->dn_struct_rwlock);
+			return (EIO);
+		}
+		nblks = 1;
+	}
+	dbp = kmem_zalloc(sizeof (dmu_buf_t *) * nblks, KM_SLEEP);
+
+	if (dn->dn_objset->os_dsl_dataset)
+		dp = dn->dn_objset->os_dsl_dataset->ds_dir->dd_pool;
+	if (dp && dsl_pool_sync_context(dp))
+		start = gethrtime();
+	zio = zio_root(dn->dn_objset->os_spa, NULL, NULL, ZIO_FLAG_CANFAIL);
+	blkid = dbuf_whichblock(dn, offset);
+	for (i = 0; i < nblks; i++) {
+		dmu_buf_impl_t *db = dbuf_hold(dn, blkid+i, tag);
+		if (db == NULL) {
+			rw_exit(&dn->dn_struct_rwlock);
+			dmu_buf_rele_array(dbp, nblks, tag);
+			zio_nowait(zio);
+			return (EIO);
+		}
+		/* initiate async i/o */
+		if (read) {
+			(void) dbuf_read(db, zio, dbuf_flags);
+		}
+		dbp[i] = &db->db;
+	}
+	rw_exit(&dn->dn_struct_rwlock);
+
+	/* wait for async i/o */
+	err = zio_wait(zio);
+	/* track read overhead when we are in sync context */
+	if (dp && dsl_pool_sync_context(dp))
+		dp->dp_read_overhead += gethrtime() - start;
+	if (err) {
+		dmu_buf_rele_array(dbp, nblks, tag);
+		return (err);
+	}
+
+	/* wait for other io to complete */
+	if (read) {
+		for (i = 0; i < nblks; i++) {
+			dmu_buf_impl_t *db = (dmu_buf_impl_t *)dbp[i];
+			mutex_enter(&db->db_mtx);
+			while (db->db_state == DB_READ ||
+			    db->db_state == DB_FILL)
+				cv_wait(&db->db_changed, &db->db_mtx);
+			if (db->db_state == DB_UNCACHED)
+				err = EIO;
+			mutex_exit(&db->db_mtx);
+			if (err) {
+				dmu_buf_rele_array(dbp, nblks, tag);
+				return (err);
+			}
+		}
+	}
+
+	*numbufsp = nblks;
+	*dbpp = dbp;
+	return (0);
+}
+
+static int
+dmu_buf_hold_array(objset_t *os, uint64_t object, uint64_t offset,
+    uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp)
+{
+	dnode_t *dn;
+	int err;
+
+	err = dnode_hold(os, object, FTAG, &dn);
+	if (err)
+		return (err);
+
+	err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag,
+	    numbufsp, dbpp, DMU_READ_PREFETCH);
+
+	dnode_rele(dn, FTAG);
+
+	return (err);
+}
+
+int
+dmu_buf_hold_array_by_bonus(dmu_buf_t *db_fake, uint64_t offset,
+    uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
+	dnode_t *dn;
+	int err;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag,
+	    numbufsp, dbpp, DMU_READ_PREFETCH);
+	DB_DNODE_EXIT(db);
+
+	return (err);
+}
+
+void
+dmu_buf_rele_array(dmu_buf_t **dbp_fake, int numbufs, void *tag)
+{
+	int i;
+	dmu_buf_impl_t **dbp = (dmu_buf_impl_t **)dbp_fake;
+
+	if (numbufs == 0)
+		return;
+
+	for (i = 0; i < numbufs; i++) {
+		if (dbp[i])
+			dbuf_rele(dbp[i], tag);
+	}
+
+	kmem_free(dbp, sizeof (dmu_buf_t *) * numbufs);
+}
+
+void
+dmu_prefetch(objset_t *os, uint64_t object, uint64_t offset, uint64_t len)
+{
+	dnode_t *dn;
+	uint64_t blkid;
+	int nblks, i, err;
+
+	if (zfs_prefetch_disable)
+		return;
+
+	if (len == 0) {  /* they're interested in the bonus buffer */
+		dn = DMU_META_DNODE(os);
+
+		if (object == 0 || object >= DN_MAX_OBJECT)
+			return;
+
+		rw_enter(&dn->dn_struct_rwlock, RW_READER);
+		blkid = dbuf_whichblock(dn, object * sizeof (dnode_phys_t));
+		dbuf_prefetch(dn, blkid);
+		rw_exit(&dn->dn_struct_rwlock);
+		return;
+	}
+
+	/*
+	 * XXX - Note, if the dnode for the requested object is not
+	 * already cached, we will do a *synchronous* read in the
+	 * dnode_hold() call.  The same is true for any indirects.
+	 */
+	err = dnode_hold(os, object, FTAG, &dn);
+	if (err != 0)
+		return;
+
+	rw_enter(&dn->dn_struct_rwlock, RW_READER);
+	if (dn->dn_datablkshift) {
+		int blkshift = dn->dn_datablkshift;
+		nblks = (P2ROUNDUP(offset+len, 1<<blkshift) -
+		    P2ALIGN(offset, 1<<blkshift)) >> blkshift;
+	} else {
+		nblks = (offset < dn->dn_datablksz);
+	}
+
+	if (nblks != 0) {
+		blkid = dbuf_whichblock(dn, offset);
+		for (i = 0; i < nblks; i++)
+			dbuf_prefetch(dn, blkid+i);
+	}
+
+	rw_exit(&dn->dn_struct_rwlock);
+
+	dnode_rele(dn, FTAG);
+}
+
+/*
+ * Get the next "chunk" of file data to free.  We traverse the file from
+ * the end so that the file gets shorter over time (if we crashes in the
+ * middle, this will leave us in a better state).  We find allocated file
+ * data by simply searching the allocated level 1 indirects.
+ */
+static int
+get_next_chunk(dnode_t *dn, uint64_t *start, uint64_t limit)
+{
+	uint64_t len = *start - limit;
+	uint64_t blkcnt = 0;
+	uint64_t maxblks = DMU_MAX_ACCESS / (1ULL << (dn->dn_indblkshift + 1));
+	uint64_t iblkrange =
+	    dn->dn_datablksz * EPB(dn->dn_indblkshift, SPA_BLKPTRSHIFT);
+
+	ASSERT(limit <= *start);
+
+	if (len <= iblkrange * maxblks) {
+		*start = limit;
+		return (0);
+	}
+	ASSERT(ISP2(iblkrange));
+
+	while (*start > limit && blkcnt < maxblks) {
+		int err;
+
+		/* find next allocated L1 indirect */
+		err = dnode_next_offset(dn,
+		    DNODE_FIND_BACKWARDS, start, 2, 1, 0);
+
+		/* if there are no more, then we are done */
+		if (err == ESRCH) {
+			*start = limit;
+			return (0);
+		} else if (err) {
+			return (err);
+		}
+		blkcnt += 1;
+
+		/* reset offset to end of "next" block back */
+		*start = P2ALIGN(*start, iblkrange);
+		if (*start <= limit)
+			*start = limit;
+		else
+			*start -= 1;
+	}
+	return (0);
+}
+
+static int
+dmu_free_long_range_impl(objset_t *os, dnode_t *dn, uint64_t offset,
+    uint64_t length, boolean_t free_dnode)
+{
+	dmu_tx_t *tx;
+	uint64_t object_size, start, end, len;
+	boolean_t trunc = (length == DMU_OBJECT_END);
+	int align, err;
+
+	align = 1 << dn->dn_datablkshift;
+	ASSERT(align > 0);
+	object_size = align == 1 ? dn->dn_datablksz :
+	    (dn->dn_maxblkid + 1) << dn->dn_datablkshift;
+
+	end = offset + length;
+	if (trunc || end > object_size)
+		end = object_size;
+	if (end <= offset)
+		return (0);
+	length = end - offset;
+
+	while (length) {
+		start = end;
+		/* assert(offset <= start) */
+		err = get_next_chunk(dn, &start, offset);
+		if (err)
+			return (err);
+		len = trunc ? DMU_OBJECT_END : end - start;
+
+		tx = dmu_tx_create(os);
+		dmu_tx_hold_free(tx, dn->dn_object, start, len);
+		err = dmu_tx_assign(tx, TXG_WAIT);
+		if (err) {
+			dmu_tx_abort(tx);
+			return (err);
+		}
+
+		dnode_free_range(dn, start, trunc ? -1 : len, tx);
+
+		if (start == 0 && free_dnode) {
+			ASSERT(trunc);
+			dnode_free(dn, tx);
+		}
+
+		length -= end - start;
+
+		dmu_tx_commit(tx);
+		end = start;
+	}
+	return (0);
+}
+
+int
+dmu_free_long_range(objset_t *os, uint64_t object,
+    uint64_t offset, uint64_t length)
+{
+	dnode_t *dn;
+	int err;
+
+	err = dnode_hold(os, object, FTAG, &dn);
+	if (err != 0)
+		return (err);
+	err = dmu_free_long_range_impl(os, dn, offset, length, FALSE);
+	dnode_rele(dn, FTAG);
+	return (err);
+}
+
+int
+dmu_free_object(objset_t *os, uint64_t object)
+{
+	dnode_t *dn;
+	dmu_tx_t *tx;
+	int err;
+
+	err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED,
+	    FTAG, &dn);
+	if (err != 0)
+		return (err);
+	if (dn->dn_nlevels == 1) {
+		tx = dmu_tx_create(os);
+		dmu_tx_hold_bonus(tx, object);
+		dmu_tx_hold_free(tx, dn->dn_object, 0, DMU_OBJECT_END);
+		err = dmu_tx_assign(tx, TXG_WAIT);
+		if (err == 0) {
+			dnode_free_range(dn, 0, DMU_OBJECT_END, tx);
+			dnode_free(dn, tx);
+			dmu_tx_commit(tx);
+		} else {
+			dmu_tx_abort(tx);
+		}
+	} else {
+		err = dmu_free_long_range_impl(os, dn, 0, DMU_OBJECT_END, TRUE);
+	}
+	dnode_rele(dn, FTAG);
+	return (err);
+}
+
+int
+dmu_free_range(objset_t *os, uint64_t object, uint64_t offset,
+    uint64_t size, dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	int err = dnode_hold(os, object, FTAG, &dn);
+	if (err)
+		return (err);
+	ASSERT(offset < UINT64_MAX);
+	ASSERT(size == -1ULL || size <= UINT64_MAX - offset);
+	dnode_free_range(dn, offset, size, tx);
+	dnode_rele(dn, FTAG);
+	return (0);
+}
+
+int
+dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
+    void *buf, uint32_t flags)
+{
+	dnode_t *dn;
+	dmu_buf_t **dbp;
+	int numbufs, err;
+
+	err = dnode_hold(os, object, FTAG, &dn);
+	if (err)
+		return (err);
+
+	/*
+	 * Deal with odd block sizes, where there can't be data past the first
+	 * block.  If we ever do the tail block optimization, we will need to
+	 * handle that here as well.
+	 */
+	if (dn->dn_maxblkid == 0) {
+		int newsz = offset > dn->dn_datablksz ? 0 :
+		    MIN(size, dn->dn_datablksz - offset);
+		bzero((char *)buf + newsz, size - newsz);
+		size = newsz;
+	}
+
+	while (size > 0) {
+		uint64_t mylen = MIN(size, DMU_MAX_ACCESS / 2);
+		int i;
+
+		/*
+		 * NB: we could do this block-at-a-time, but it's nice
+		 * to be reading in parallel.
+		 */
+		err = dmu_buf_hold_array_by_dnode(dn, offset, mylen,
+		    TRUE, FTAG, &numbufs, &dbp, flags);
+		if (err)
+			break;
+
+		for (i = 0; i < numbufs; i++) {
+			int tocpy;
+			int bufoff;
+			dmu_buf_t *db = dbp[i];
+
+			ASSERT(size > 0);
+
+			bufoff = offset - db->db_offset;
+			tocpy = (int)MIN(db->db_size - bufoff, size);
+
+			bcopy((char *)db->db_data + bufoff, buf, tocpy);
+
+			offset += tocpy;
+			size -= tocpy;
+			buf = (char *)buf + tocpy;
+		}
+		dmu_buf_rele_array(dbp, numbufs, FTAG);
+	}
+	dnode_rele(dn, FTAG);
+	return (err);
+}
+
+void
+dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
+    const void *buf, dmu_tx_t *tx)
+{
+	dmu_buf_t **dbp;
+	int numbufs, i;
+
+	if (size == 0)
+		return;
+
+	VERIFY(0 == dmu_buf_hold_array(os, object, offset, size,
+	    FALSE, FTAG, &numbufs, &dbp));
+
+	for (i = 0; i < numbufs; i++) {
+		int tocpy;
+		int bufoff;
+		dmu_buf_t *db = dbp[i];
+
+		ASSERT(size > 0);
+
+		bufoff = offset - db->db_offset;
+		tocpy = (int)MIN(db->db_size - bufoff, size);
+
+		ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size);
+
+		if (tocpy == db->db_size)
+			dmu_buf_will_fill(db, tx);
+		else
+			dmu_buf_will_dirty(db, tx);
+
+		bcopy(buf, (char *)db->db_data + bufoff, tocpy);
+
+		if (tocpy == db->db_size)
+			dmu_buf_fill_done(db, tx);
+
+		offset += tocpy;
+		size -= tocpy;
+		buf = (char *)buf + tocpy;
+	}
+	dmu_buf_rele_array(dbp, numbufs, FTAG);
+}
+
+void
+dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
+    dmu_tx_t *tx)
+{
+	dmu_buf_t **dbp;
+	int numbufs, i;
+
+	if (size == 0)
+		return;
+
+	VERIFY(0 == dmu_buf_hold_array(os, object, offset, size,
+	    FALSE, FTAG, &numbufs, &dbp));
+
+	for (i = 0; i < numbufs; i++) {
+		dmu_buf_t *db = dbp[i];
+
+		dmu_buf_will_not_fill(db, tx);
+	}
+	dmu_buf_rele_array(dbp, numbufs, FTAG);
+}
+
+/*
+ * DMU support for xuio
+ */
+kstat_t *xuio_ksp = NULL;
+
+int
+dmu_xuio_init(xuio_t *xuio, int nblk)
+{
+	dmu_xuio_t *priv;
+	uio_t *uio = &xuio->xu_uio;
+
+	uio->uio_iovcnt = nblk;
+	uio->uio_iov = kmem_zalloc(nblk * sizeof (iovec_t), KM_SLEEP);
+
+	priv = kmem_zalloc(sizeof (dmu_xuio_t), KM_SLEEP);
+	priv->cnt = nblk;
+	priv->bufs = kmem_zalloc(nblk * sizeof (arc_buf_t *), KM_SLEEP);
+	priv->iovp = uio->uio_iov;
+	XUIO_XUZC_PRIV(xuio) = priv;
+
+	if (XUIO_XUZC_RW(xuio) == UIO_READ)
+		XUIOSTAT_INCR(xuiostat_onloan_rbuf, nblk);
+	else
+		XUIOSTAT_INCR(xuiostat_onloan_wbuf, nblk);
+
+	return (0);
+}
+
+void
+dmu_xuio_fini(xuio_t *xuio)
+{
+	dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio);
+	int nblk = priv->cnt;
+
+	kmem_free(priv->iovp, nblk * sizeof (iovec_t));
+	kmem_free(priv->bufs, nblk * sizeof (arc_buf_t *));
+	kmem_free(priv, sizeof (dmu_xuio_t));
+
+	if (XUIO_XUZC_RW(xuio) == UIO_READ)
+		XUIOSTAT_INCR(xuiostat_onloan_rbuf, -nblk);
+	else
+		XUIOSTAT_INCR(xuiostat_onloan_wbuf, -nblk);
+}
+
+/*
+ * Initialize iov[priv->next] and priv->bufs[priv->next] with { off, n, abuf }
+ * and increase priv->next by 1.
+ */
+int
+dmu_xuio_add(xuio_t *xuio, arc_buf_t *abuf, offset_t off, size_t n)
+{
+	struct iovec *iov;
+	uio_t *uio = &xuio->xu_uio;
+	dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio);
+	int i = priv->next++;
+
+	ASSERT(i < priv->cnt);
+	ASSERT(off + n <= arc_buf_size(abuf));
+	iov = uio->uio_iov + i;
+	iov->iov_base = (char *)abuf->b_data + off;
+	iov->iov_len = n;
+	priv->bufs[i] = abuf;
+	return (0);
+}
+
+int
+dmu_xuio_cnt(xuio_t *xuio)
+{
+	dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio);
+	return (priv->cnt);
+}
+
+arc_buf_t *
+dmu_xuio_arcbuf(xuio_t *xuio, int i)
+{
+	dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio);
+
+	ASSERT(i < priv->cnt);
+	return (priv->bufs[i]);
+}
+
+void
+dmu_xuio_clear(xuio_t *xuio, int i)
+{
+	dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio);
+
+	ASSERT(i < priv->cnt);
+	priv->bufs[i] = NULL;
+}
+
+static void
+xuio_stat_init(void)
+{
+	xuio_ksp = kstat_create("zfs", 0, "xuio_stats", "misc",
+	    KSTAT_TYPE_NAMED, sizeof (xuio_stats) / sizeof (kstat_named_t),
+	    KSTAT_FLAG_VIRTUAL);
+	if (xuio_ksp != NULL) {
+		xuio_ksp->ks_data = &xuio_stats;
+		kstat_install(xuio_ksp);
+	}
+}
+
+static void
+xuio_stat_fini(void)
+{
+	if (xuio_ksp != NULL) {
+		kstat_delete(xuio_ksp);
+		xuio_ksp = NULL;
+	}
+}
+
+void
+xuio_stat_wbuf_copied()
+{
+	XUIOSTAT_BUMP(xuiostat_wbuf_copied);
+}
+
+void
+xuio_stat_wbuf_nocopy()
+{
+	XUIOSTAT_BUMP(xuiostat_wbuf_nocopy);
+}
+
+#ifdef _KERNEL
+int
+dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size)
+{
+	dmu_buf_t **dbp;
+	int numbufs, i, err;
+	xuio_t *xuio = NULL;
+
+	/*
+	 * NB: we could do this block-at-a-time, but it's nice
+	 * to be reading in parallel.
+	 */
+	err = dmu_buf_hold_array(os, object, uio->uio_loffset, size, TRUE, FTAG,
+	    &numbufs, &dbp);
+	if (err)
+		return (err);
+
+	if (uio->uio_extflg == UIO_XUIO)
+		xuio = (xuio_t *)uio;
+
+	for (i = 0; i < numbufs; i++) {
+		int tocpy;
+		int bufoff;
+		dmu_buf_t *db = dbp[i];
+
+		ASSERT(size > 0);
+
+		bufoff = uio->uio_loffset - db->db_offset;
+		tocpy = (int)MIN(db->db_size - bufoff, size);
+
+		if (xuio) {
+			dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)db;
+			arc_buf_t *dbuf_abuf = dbi->db_buf;
+			arc_buf_t *abuf = dbuf_loan_arcbuf(dbi);
+			err = dmu_xuio_add(xuio, abuf, bufoff, tocpy);
+			if (!err) {
+				uio->uio_resid -= tocpy;
+				uio->uio_loffset += tocpy;
+			}
+
+			if (abuf == dbuf_abuf)
+				XUIOSTAT_BUMP(xuiostat_rbuf_nocopy);
+			else
+				XUIOSTAT_BUMP(xuiostat_rbuf_copied);
+		} else {
+			err = uiomove((char *)db->db_data + bufoff, tocpy,
+			    UIO_READ, uio);
+		}
+		if (err)
+			break;
+
+		size -= tocpy;
+	}
+	dmu_buf_rele_array(dbp, numbufs, FTAG);
+
+	return (err);
+}
+
+static int
+dmu_write_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size, dmu_tx_t *tx)
+{
+	dmu_buf_t **dbp;
+	int numbufs;
+	int err = 0;
+	int i;
+
+	err = dmu_buf_hold_array_by_dnode(dn, uio->uio_loffset, size,
+	    FALSE, FTAG, &numbufs, &dbp, DMU_READ_PREFETCH);
+	if (err)
+		return (err);
+
+	for (i = 0; i < numbufs; i++) {
+		int tocpy;
+		int bufoff;
+		dmu_buf_t *db = dbp[i];
+
+		ASSERT(size > 0);
+
+		bufoff = uio->uio_loffset - db->db_offset;
+		tocpy = (int)MIN(db->db_size - bufoff, size);
+
+		ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size);
+
+		if (tocpy == db->db_size)
+			dmu_buf_will_fill(db, tx);
+		else
+			dmu_buf_will_dirty(db, tx);
+
+		/*
+		 * XXX uiomove could block forever (eg. nfs-backed
+		 * pages).  There needs to be a uiolockdown() function
+		 * to lock the pages in memory, so that uiomove won't
+		 * block.
+		 */
+		err = uiomove((char *)db->db_data + bufoff, tocpy,
+		    UIO_WRITE, uio);
+
+		if (tocpy == db->db_size)
+			dmu_buf_fill_done(db, tx);
+
+		if (err)
+			break;
+
+		size -= tocpy;
+	}
+
+	dmu_buf_rele_array(dbp, numbufs, FTAG);
+	return (err);
+}
+
+int
+dmu_write_uio_dbuf(dmu_buf_t *zdb, uio_t *uio, uint64_t size,
+    dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)zdb;
+	dnode_t *dn;
+	int err;
+
+	if (size == 0)
+		return (0);
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	err = dmu_write_uio_dnode(dn, uio, size, tx);
+	DB_DNODE_EXIT(db);
+
+	return (err);
+}
+
+int
+dmu_write_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size,
+    dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	int err;
+
+	if (size == 0)
+		return (0);
+
+	err = dnode_hold(os, object, FTAG, &dn);
+	if (err)
+		return (err);
+
+	err = dmu_write_uio_dnode(dn, uio, size, tx);
+
+	dnode_rele(dn, FTAG);
+
+	return (err);
+}
+
+int
+dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
+    page_t *pp, dmu_tx_t *tx)
+{
+	dmu_buf_t **dbp;
+	int numbufs, i;
+	int err;
+
+	if (size == 0)
+		return (0);
+
+	err = dmu_buf_hold_array(os, object, offset, size,
+	    FALSE, FTAG, &numbufs, &dbp);
+	if (err)
+		return (err);
+
+	for (i = 0; i < numbufs; i++) {
+		int tocpy, copied, thiscpy;
+		int bufoff;
+		dmu_buf_t *db = dbp[i];
+		caddr_t va;
+
+		ASSERT(size > 0);
+		ASSERT3U(db->db_size, >=, PAGESIZE);
+
+		bufoff = offset - db->db_offset;
+		tocpy = (int)MIN(db->db_size - bufoff, size);
+
+		ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size);
+
+		if (tocpy == db->db_size)
+			dmu_buf_will_fill(db, tx);
+		else
+			dmu_buf_will_dirty(db, tx);
+
+		for (copied = 0; copied < tocpy; copied += PAGESIZE) {
+			ASSERT3U(pp->p_offset, ==, db->db_offset + bufoff);
+			thiscpy = MIN(PAGESIZE, tocpy - copied);
+			va = zfs_map_page(pp, S_READ);
+			bcopy(va, (char *)db->db_data + bufoff, thiscpy);
+			zfs_unmap_page(pp, va);
+			pp = pp->p_next;
+			bufoff += PAGESIZE;
+		}
+
+		if (tocpy == db->db_size)
+			dmu_buf_fill_done(db, tx);
+
+		offset += tocpy;
+		size -= tocpy;
+	}
+	dmu_buf_rele_array(dbp, numbufs, FTAG);
+	return (err);
+}
+#endif
+
+/*
+ * Allocate a loaned anonymous arc buffer.
+ */
+arc_buf_t *
+dmu_request_arcbuf(dmu_buf_t *handle, int size)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)handle;
+	spa_t *spa;
+
+	DB_GET_SPA(&spa, db);
+	return (arc_loan_buf(spa, size));
+}
+
+/*
+ * Free a loaned arc buffer.
+ */
+void
+dmu_return_arcbuf(arc_buf_t *buf)
+{
+	arc_return_buf(buf, FTAG);
+	VERIFY(arc_buf_remove_ref(buf, FTAG) == 1);
+}
+
+/*
+ * When possible directly assign passed loaned arc buffer to a dbuf.
+ * If this is not possible copy the contents of passed arc buf via
+ * dmu_write().
+ */
+void
+dmu_assign_arcbuf(dmu_buf_t *handle, uint64_t offset, arc_buf_t *buf,
+    dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *dbuf = (dmu_buf_impl_t *)handle;
+	dnode_t *dn;
+	dmu_buf_impl_t *db;
+	uint32_t blksz = (uint32_t)arc_buf_size(buf);
+	uint64_t blkid;
+
+	DB_DNODE_ENTER(dbuf);
+	dn = DB_DNODE(dbuf);
+	rw_enter(&dn->dn_struct_rwlock, RW_READER);
+	blkid = dbuf_whichblock(dn, offset);
+	VERIFY((db = dbuf_hold(dn, blkid, FTAG)) != NULL);
+	rw_exit(&dn->dn_struct_rwlock);
+	DB_DNODE_EXIT(dbuf);
+
+	if (offset == db->db.db_offset && blksz == db->db.db_size) {
+		dbuf_assign_arcbuf(db, buf, tx);
+		dbuf_rele(db, FTAG);
+	} else {
+		objset_t *os;
+		uint64_t object;
+
+		DB_DNODE_ENTER(dbuf);
+		dn = DB_DNODE(dbuf);
+		os = dn->dn_objset;
+		object = dn->dn_object;
+		DB_DNODE_EXIT(dbuf);
+
+		dbuf_rele(db, FTAG);
+		dmu_write(os, object, offset, blksz, buf->b_data, tx);
+		dmu_return_arcbuf(buf);
+		XUIOSTAT_BUMP(xuiostat_wbuf_copied);
+	}
+}
+
+typedef struct {
+	dbuf_dirty_record_t	*dsa_dr;
+	dmu_sync_cb_t		*dsa_done;
+	zgd_t			*dsa_zgd;
+	dmu_tx_t		*dsa_tx;
+} dmu_sync_arg_t;
+
+/* ARGSUSED */
+static void
+dmu_sync_ready(zio_t *zio, arc_buf_t *buf, void *varg)
+{
+	dmu_sync_arg_t *dsa = varg;
+	dmu_buf_t *db = dsa->dsa_zgd->zgd_db;
+	blkptr_t *bp = zio->io_bp;
+
+	if (zio->io_error == 0) {
+		if (BP_IS_HOLE(bp)) {
+			/*
+			 * A block of zeros may compress to a hole, but the
+			 * block size still needs to be known for replay.
+			 */
+			BP_SET_LSIZE(bp, db->db_size);
+		} else {
+			ASSERT(BP_GET_LEVEL(bp) == 0);
+			bp->blk_fill = 1;
+		}
+	}
+}
+
+static void
+dmu_sync_late_arrival_ready(zio_t *zio)
+{
+	dmu_sync_ready(zio, NULL, zio->io_private);
+}
+
+/* ARGSUSED */
+static void
+dmu_sync_done(zio_t *zio, arc_buf_t *buf, void *varg)
+{
+	dmu_sync_arg_t *dsa = varg;
+	dbuf_dirty_record_t *dr = dsa->dsa_dr;
+	dmu_buf_impl_t *db = dr->dr_dbuf;
+
+	mutex_enter(&db->db_mtx);
+	ASSERT(dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC);
+	if (zio->io_error == 0) {
+		dr->dt.dl.dr_overridden_by = *zio->io_bp;
+		dr->dt.dl.dr_override_state = DR_OVERRIDDEN;
+		dr->dt.dl.dr_copies = zio->io_prop.zp_copies;
+		if (BP_IS_HOLE(&dr->dt.dl.dr_overridden_by))
+			BP_ZERO(&dr->dt.dl.dr_overridden_by);
+	} else {
+		dr->dt.dl.dr_override_state = DR_NOT_OVERRIDDEN;
+	}
+	cv_broadcast(&db->db_changed);
+	mutex_exit(&db->db_mtx);
+
+	dsa->dsa_done(dsa->dsa_zgd, zio->io_error);
+
+	kmem_free(dsa, sizeof (*dsa));
+}
+
+static void
+dmu_sync_late_arrival_done(zio_t *zio)
+{
+	blkptr_t *bp = zio->io_bp;
+	dmu_sync_arg_t *dsa = zio->io_private;
+
+	if (zio->io_error == 0 && !BP_IS_HOLE(bp)) {
+		ASSERT(zio->io_bp->blk_birth == zio->io_txg);
+		ASSERT(zio->io_txg > spa_syncing_txg(zio->io_spa));
+		zio_free(zio->io_spa, zio->io_txg, zio->io_bp);
+	}
+
+	dmu_tx_commit(dsa->dsa_tx);
+
+	dsa->dsa_done(dsa->dsa_zgd, zio->io_error);
+
+	kmem_free(dsa, sizeof (*dsa));
+}
+
+static int
+dmu_sync_late_arrival(zio_t *pio, objset_t *os, dmu_sync_cb_t *done, zgd_t *zgd,
+    zio_prop_t *zp, zbookmark_t *zb)
+{
+	dmu_sync_arg_t *dsa;
+	dmu_tx_t *tx;
+
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_space(tx, zgd->zgd_db->db_size);
+	if (dmu_tx_assign(tx, TXG_WAIT) != 0) {
+		dmu_tx_abort(tx);
+		return (EIO);	/* Make zl_get_data do txg_waited_synced() */
+	}
+
+	dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP);
+	dsa->dsa_dr = NULL;
+	dsa->dsa_done = done;
+	dsa->dsa_zgd = zgd;
+	dsa->dsa_tx = tx;
+
+	zio_nowait(zio_write(pio, os->os_spa, dmu_tx_get_txg(tx), zgd->zgd_bp,
+	    zgd->zgd_db->db_data, zgd->zgd_db->db_size, zp,
+	    dmu_sync_late_arrival_ready, dmu_sync_late_arrival_done, dsa,
+	    ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, zb));
+
+	return (0);
+}
+
+/*
+ * Intent log support: sync the block associated with db to disk.
+ * N.B. and XXX: the caller is responsible for making sure that the
+ * data isn't changing while dmu_sync() is writing it.
+ *
+ * Return values:
+ *
+ *	EEXIST: this txg has already been synced, so there's nothing to to.
+ *		The caller should not log the write.
+ *
+ *	ENOENT: the block was dbuf_free_range()'d, so there's nothing to do.
+ *		The caller should not log the write.
+ *
+ *	EALREADY: this block is already in the process of being synced.
+ *		The caller should track its progress (somehow).
+ *
+ *	EIO: could not do the I/O.
+ *		The caller should do a txg_wait_synced().
+ *
+ *	0: the I/O has been initiated.
+ *		The caller should log this blkptr in the done callback.
+ *		It is possible that the I/O will fail, in which case
+ *		the error will be reported to the done callback and
+ *		propagated to pio from zio_done().
+ */
+int
+dmu_sync(zio_t *pio, uint64_t txg, dmu_sync_cb_t *done, zgd_t *zgd)
+{
+	blkptr_t *bp = zgd->zgd_bp;
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)zgd->zgd_db;
+	objset_t *os = db->db_objset;
+	dsl_dataset_t *ds = os->os_dsl_dataset;
+	dbuf_dirty_record_t *dr;
+	dmu_sync_arg_t *dsa;
+	zbookmark_t zb;
+	zio_prop_t zp;
+	dnode_t *dn;
+
+	ASSERT(pio != NULL);
+	ASSERT(BP_IS_HOLE(bp));
+	ASSERT(txg != 0);
+
+	SET_BOOKMARK(&zb, ds->ds_object,
+	    db->db.db_object, db->db_level, db->db_blkid);
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	dmu_write_policy(os, dn, db->db_level, WP_DMU_SYNC, &zp);
+	DB_DNODE_EXIT(db);
+
+	/*
+	 * If we're frozen (running ziltest), we always need to generate a bp.
+	 */
+	if (txg > spa_freeze_txg(os->os_spa))
+		return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb));
+
+	/*
+	 * Grabbing db_mtx now provides a barrier between dbuf_sync_leaf()
+	 * and us.  If we determine that this txg is not yet syncing,
+	 * but it begins to sync a moment later, that's OK because the
+	 * sync thread will block in dbuf_sync_leaf() until we drop db_mtx.
+	 */
+	mutex_enter(&db->db_mtx);
+
+	if (txg <= spa_last_synced_txg(os->os_spa)) {
+		/*
+		 * This txg has already synced.  There's nothing to do.
+		 */
+		mutex_exit(&db->db_mtx);
+		return (EEXIST);
+	}
+
+	if (txg <= spa_syncing_txg(os->os_spa)) {
+		/*
+		 * This txg is currently syncing, so we can't mess with
+		 * the dirty record anymore; just write a new log block.
+		 */
+		mutex_exit(&db->db_mtx);
+		return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb));
+	}
+
+	dr = db->db_last_dirty;
+	while (dr && dr->dr_txg != txg)
+		dr = dr->dr_next;
+
+	if (dr == NULL) {
+		/*
+		 * There's no dr for this dbuf, so it must have been freed.
+		 * There's no need to log writes to freed blocks, so we're done.
+		 */
+		mutex_exit(&db->db_mtx);
+		return (ENOENT);
+	}
+
+	ASSERT(dr->dr_txg == txg);
+	if (dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC ||
+	    dr->dt.dl.dr_override_state == DR_OVERRIDDEN) {
+		/*
+		 * We have already issued a sync write for this buffer,
+		 * or this buffer has already been synced.  It could not
+		 * have been dirtied since, or we would have cleared the state.
+		 */
+		mutex_exit(&db->db_mtx);
+		return (EALREADY);
+	}
+
+	ASSERT(dr->dt.dl.dr_override_state == DR_NOT_OVERRIDDEN);
+	dr->dt.dl.dr_override_state = DR_IN_DMU_SYNC;
+	mutex_exit(&db->db_mtx);
+
+	dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP);
+	dsa->dsa_dr = dr;
+	dsa->dsa_done = done;
+	dsa->dsa_zgd = zgd;
+	dsa->dsa_tx = NULL;
+
+	zio_nowait(arc_write(pio, os->os_spa, txg,
+	    bp, dr->dt.dl.dr_data, DBUF_IS_L2CACHEABLE(db), &zp,
+	    dmu_sync_ready, dmu_sync_done, dsa,
+	    ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, &zb));
+
+	return (0);
+}
+
+int
+dmu_object_set_blocksize(objset_t *os, uint64_t object, uint64_t size, int ibs,
+	dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	int err;
+
+	err = dnode_hold(os, object, FTAG, &dn);
+	if (err)
+		return (err);
+	err = dnode_set_blksz(dn, size, ibs, tx);
+	dnode_rele(dn, FTAG);
+	return (err);
+}
+
+void
+dmu_object_set_checksum(objset_t *os, uint64_t object, uint8_t checksum,
+	dmu_tx_t *tx)
+{
+	dnode_t *dn;
+
+	/* XXX assumes dnode_hold will not get an i/o error */
+	(void) dnode_hold(os, object, FTAG, &dn);
+	ASSERT(checksum < ZIO_CHECKSUM_FUNCTIONS);
+	dn->dn_checksum = checksum;
+	dnode_setdirty(dn, tx);
+	dnode_rele(dn, FTAG);
+}
+
+void
+dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress,
+	dmu_tx_t *tx)
+{
+	dnode_t *dn;
+
+	/* XXX assumes dnode_hold will not get an i/o error */
+	(void) dnode_hold(os, object, FTAG, &dn);
+	ASSERT(compress < ZIO_COMPRESS_FUNCTIONS);
+	dn->dn_compress = compress;
+	dnode_setdirty(dn, tx);
+	dnode_rele(dn, FTAG);
+}
+
+int zfs_mdcomp_disable = 0;
+
+void
+dmu_write_policy(objset_t *os, dnode_t *dn, int level, int wp, zio_prop_t *zp)
+{
+	dmu_object_type_t type = dn ? dn->dn_type : DMU_OT_OBJSET;
+	boolean_t ismd = (level > 0 || dmu_ot[type].ot_metadata ||
+	    (wp & WP_SPILL));
+	enum zio_checksum checksum = os->os_checksum;
+	enum zio_compress compress = os->os_compress;
+	enum zio_checksum dedup_checksum = os->os_dedup_checksum;
+	boolean_t dedup;
+	boolean_t dedup_verify = os->os_dedup_verify;
+	int copies = os->os_copies;
+
+	/*
+	 * Determine checksum setting.
+	 */
+	if (ismd) {
+		/*
+		 * Metadata always gets checksummed.  If the data
+		 * checksum is multi-bit correctable, and it's not a
+		 * ZBT-style checksum, then it's suitable for metadata
+		 * as well.  Otherwise, the metadata checksum defaults
+		 * to fletcher4.
+		 */
+		if (zio_checksum_table[checksum].ci_correctable < 1 ||
+		    zio_checksum_table[checksum].ci_eck)
+			checksum = ZIO_CHECKSUM_FLETCHER_4;
+	} else {
+		checksum = zio_checksum_select(dn->dn_checksum, checksum);
+	}
+
+	/*
+	 * Determine compression setting.
+	 */
+	if (ismd) {
+		/*
+		 * XXX -- we should design a compression algorithm
+		 * that specializes in arrays of bps.
+		 */
+		compress = zfs_mdcomp_disable ? ZIO_COMPRESS_EMPTY :
+		    ZIO_COMPRESS_LZJB;
+	} else {
+		compress = zio_compress_select(dn->dn_compress, compress);
+	}
+
+	/*
+	 * Determine dedup setting.  If we are in dmu_sync(), we won't
+	 * actually dedup now because that's all done in syncing context;
+	 * but we do want to use the dedup checkum.  If the checksum is not
+	 * strong enough to ensure unique signatures, force dedup_verify.
+	 */
+	dedup = (!ismd && dedup_checksum != ZIO_CHECKSUM_OFF);
+	if (dedup) {
+		checksum = dedup_checksum;
+		if (!zio_checksum_table[checksum].ci_dedup)
+			dedup_verify = 1;
+	}
+
+	if (wp & WP_DMU_SYNC)
+		dedup = 0;
+
+	if (wp & WP_NOFILL) {
+		ASSERT(!ismd && level == 0);
+		checksum = ZIO_CHECKSUM_OFF;
+		compress = ZIO_COMPRESS_OFF;
+		dedup = B_FALSE;
+	}
+
+	zp->zp_checksum = checksum;
+	zp->zp_compress = compress;
+	zp->zp_type = (wp & WP_SPILL) ? dn->dn_bonustype : type;
+	zp->zp_level = level;
+	zp->zp_copies = MIN(copies + ismd, spa_max_replication(os->os_spa));
+	zp->zp_dedup = dedup;
+	zp->zp_dedup_verify = dedup && dedup_verify;
+}
+
+int
+dmu_offset_next(objset_t *os, uint64_t object, boolean_t hole, uint64_t *off)
+{
+	dnode_t *dn;
+	int i, err;
+
+	err = dnode_hold(os, object, FTAG, &dn);
+	if (err)
+		return (err);
+	/*
+	 * Sync any current changes before
+	 * we go trundling through the block pointers.
+	 */
+	for (i = 0; i < TXG_SIZE; i++) {
+		if (list_link_active(&dn->dn_dirty_link[i]))
+			break;
+	}
+	if (i != TXG_SIZE) {
+		dnode_rele(dn, FTAG);
+		txg_wait_synced(dmu_objset_pool(os), 0);
+		err = dnode_hold(os, object, FTAG, &dn);
+		if (err)
+			return (err);
+	}
+
+	err = dnode_next_offset(dn, (hole ? DNODE_FIND_HOLE : 0), off, 1, 1, 0);
+	dnode_rele(dn, FTAG);
+
+	return (err);
+}
+
+void
+dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi)
+{
+	dnode_phys_t *dnp;
+
+	rw_enter(&dn->dn_struct_rwlock, RW_READER);
+	mutex_enter(&dn->dn_mtx);
+
+	dnp = dn->dn_phys;
+
+	doi->doi_data_block_size = dn->dn_datablksz;
+	doi->doi_metadata_block_size = dn->dn_indblkshift ?
+	    1ULL << dn->dn_indblkshift : 0;
+	doi->doi_type = dn->dn_type;
+	doi->doi_bonus_type = dn->dn_bonustype;
+	doi->doi_bonus_size = dn->dn_bonuslen;
+	doi->doi_indirection = dn->dn_nlevels;
+	doi->doi_checksum = dn->dn_checksum;
+	doi->doi_compress = dn->dn_compress;
+	doi->doi_physical_blocks_512 = (DN_USED_BYTES(dnp) + 256) >> 9;
+	doi->doi_max_offset = (dnp->dn_maxblkid + 1) * dn->dn_datablksz;
+	doi->doi_fill_count = 0;
+	for (int i = 0; i < dnp->dn_nblkptr; i++)
+		doi->doi_fill_count += dnp->dn_blkptr[i].blk_fill;
+
+	mutex_exit(&dn->dn_mtx);
+	rw_exit(&dn->dn_struct_rwlock);
+}
+
+/*
+ * Get information on a DMU object.
+ * If doi is NULL, just indicates whether the object exists.
+ */
+int
+dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi)
+{
+	dnode_t *dn;
+	int err = dnode_hold(os, object, FTAG, &dn);
+
+	if (err)
+		return (err);
+
+	if (doi != NULL)
+		dmu_object_info_from_dnode(dn, doi);
+
+	dnode_rele(dn, FTAG);
+	return (0);
+}
+
+/*
+ * As above, but faster; can be used when you have a held dbuf in hand.
+ */
+void
+dmu_object_info_from_db(dmu_buf_t *db_fake, dmu_object_info_t *doi)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
+
+	DB_DNODE_ENTER(db);
+	dmu_object_info_from_dnode(DB_DNODE(db), doi);
+	DB_DNODE_EXIT(db);
+}
+
+/*
+ * Faster still when you only care about the size.
+ * This is specifically optimized for zfs_getattr().
+ */
+void
+dmu_object_size_from_db(dmu_buf_t *db_fake, uint32_t *blksize,
+    u_longlong_t *nblk512)
+{
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
+	dnode_t *dn;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+
+	*blksize = dn->dn_datablksz;
+	/* add 1 for dnode space */
+	*nblk512 = ((DN_USED_BYTES(dn->dn_phys) + SPA_MINBLOCKSIZE/2) >>
+	    SPA_MINBLOCKSHIFT) + 1;
+	DB_DNODE_EXIT(db);
+}
+
+void
+byteswap_uint64_array(void *vbuf, size_t size)
+{
+	uint64_t *buf = vbuf;
+	size_t count = size >> 3;
+	int i;
+
+	ASSERT((size & 7) == 0);
+
+	for (i = 0; i < count; i++)
+		buf[i] = BSWAP_64(buf[i]);
+}
+
+void
+byteswap_uint32_array(void *vbuf, size_t size)
+{
+	uint32_t *buf = vbuf;
+	size_t count = size >> 2;
+	int i;
+
+	ASSERT((size & 3) == 0);
+
+	for (i = 0; i < count; i++)
+		buf[i] = BSWAP_32(buf[i]);
+}
+
+void
+byteswap_uint16_array(void *vbuf, size_t size)
+{
+	uint16_t *buf = vbuf;
+	size_t count = size >> 1;
+	int i;
+
+	ASSERT((size & 1) == 0);
+
+	for (i = 0; i < count; i++)
+		buf[i] = BSWAP_16(buf[i]);
+}
+
+/* ARGSUSED */
+void
+byteswap_uint8_array(void *vbuf, size_t size)
+{
+}
+
+void
+dmu_init(void)
+{
+	zfs_dbgmsg_init();
+	sa_cache_init();
+	xuio_stat_init();
+	dmu_objset_init();
+	dnode_init();
+	dbuf_init();
+	zfetch_init();
+	arc_init();
+	l2arc_init();
+}
+
+void
+dmu_fini(void)
+{
+	l2arc_fini();
+	arc_fini();
+	zfetch_fini();
+	dbuf_fini();
+	dnode_fini();
+	dmu_objset_fini();
+	xuio_stat_fini();
+	sa_cache_fini();
+	zfs_dbgmsg_fini();
+}
diff --git a/uts/common/fs/zfs/dmu_diff.c b/uts/common/fs/zfs/dmu_diff.c
new file mode 100644
index 000000000000..22340ebc5374
--- /dev/null
+++ b/uts/common/fs/zfs/dmu_diff.c
@@ -0,0 +1,221 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/dmu.h>
+#include <sys/dmu_impl.h>
+#include <sys/dmu_tx.h>
+#include <sys/dbuf.h>
+#include <sys/dnode.h>
+#include <sys/zfs_context.h>
+#include <sys/dmu_objset.h>
+#include <sys/dmu_traverse.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_pool.h>
+#include <sys/dsl_synctask.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/zap.h>
+#include <sys/zio_checksum.h>
+#include <sys/zfs_znode.h>
+
+struct diffarg {
+	struct vnode *da_vp;		/* file to which we are reporting */
+	offset_t *da_offp;
+	int da_err;			/* error that stopped diff search */
+	dmu_diff_record_t da_ddr;
+};
+
+static int
+write_record(struct diffarg *da)
+{
+	ssize_t resid; /* have to get resid to get detailed errno */
+
+	if (da->da_ddr.ddr_type == DDR_NONE) {
+		da->da_err = 0;
+		return (0);
+	}
+
+	da->da_err = vn_rdwr(UIO_WRITE, da->da_vp, (caddr_t)&da->da_ddr,
+	    sizeof (da->da_ddr), 0, UIO_SYSSPACE, FAPPEND,
+	    RLIM64_INFINITY, CRED(), &resid);
+	*da->da_offp += sizeof (da->da_ddr);
+	return (da->da_err);
+}
+
+static int
+report_free_dnode_range(struct diffarg *da, uint64_t first, uint64_t last)
+{
+	ASSERT(first <= last);
+	if (da->da_ddr.ddr_type != DDR_FREE ||
+	    first != da->da_ddr.ddr_last + 1) {
+		if (write_record(da) != 0)
+			return (da->da_err);
+		da->da_ddr.ddr_type = DDR_FREE;
+		da->da_ddr.ddr_first = first;
+		da->da_ddr.ddr_last = last;
+		return (0);
+	}
+	da->da_ddr.ddr_last = last;
+	return (0);
+}
+
+static int
+report_dnode(struct diffarg *da, uint64_t object, dnode_phys_t *dnp)
+{
+	ASSERT(dnp != NULL);
+	if (dnp->dn_type == DMU_OT_NONE)
+		return (report_free_dnode_range(da, object, object));
+
+	if (da->da_ddr.ddr_type != DDR_INUSE ||
+	    object != da->da_ddr.ddr_last + 1) {
+		if (write_record(da) != 0)
+			return (da->da_err);
+		da->da_ddr.ddr_type = DDR_INUSE;
+		da->da_ddr.ddr_first = da->da_ddr.ddr_last = object;
+		return (0);
+	}
+	da->da_ddr.ddr_last = object;
+	return (0);
+}
+
+#define	DBP_SPAN(dnp, level)				  \
+	(((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \
+	(level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT)))
+
+/* ARGSUSED */
+static int
+diff_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, arc_buf_t *pbuf,
+    const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
+{
+	struct diffarg *da = arg;
+	int err = 0;
+
+	if (issig(JUSTLOOKING) && issig(FORREAL))
+		return (EINTR);
+
+	if (zb->zb_object != DMU_META_DNODE_OBJECT)
+		return (0);
+
+	if (bp == NULL) {
+		uint64_t span = DBP_SPAN(dnp, zb->zb_level);
+		uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT;
+
+		err = report_free_dnode_range(da, dnobj,
+		    dnobj + (span >> DNODE_SHIFT) - 1);
+		if (err)
+			return (err);
+	} else if (zb->zb_level == 0) {
+		dnode_phys_t *blk;
+		arc_buf_t *abuf;
+		uint32_t aflags = ARC_WAIT;
+		int blksz = BP_GET_LSIZE(bp);
+		int i;
+
+		if (dsl_read(NULL, spa, bp, pbuf,
+		    arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
+		    ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
+			return (EIO);
+
+		blk = abuf->b_data;
+		for (i = 0; i < blksz >> DNODE_SHIFT; i++) {
+			uint64_t dnobj = (zb->zb_blkid <<
+			    (DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i;
+			err = report_dnode(da, dnobj, blk+i);
+			if (err)
+				break;
+		}
+		(void) arc_buf_remove_ref(abuf, &abuf);
+		if (err)
+			return (err);
+		/* Don't care about the data blocks */
+		return (TRAVERSE_VISIT_NO_CHILDREN);
+	}
+	return (0);
+}
+
+int
+dmu_diff(objset_t *tosnap, objset_t *fromsnap, struct vnode *vp, offset_t *offp)
+{
+	struct diffarg da;
+	dsl_dataset_t *ds = tosnap->os_dsl_dataset;
+	dsl_dataset_t *fromds = fromsnap->os_dsl_dataset;
+	dsl_dataset_t *findds;
+	dsl_dataset_t *relds;
+	int err = 0;
+
+	/* make certain we are looking at snapshots */
+	if (!dsl_dataset_is_snapshot(ds) || !dsl_dataset_is_snapshot(fromds))
+		return (EINVAL);
+
+	/* fromsnap must be earlier and from the same lineage as tosnap */
+	if (fromds->ds_phys->ds_creation_txg >= ds->ds_phys->ds_creation_txg)
+		return (EXDEV);
+
+	relds = NULL;
+	findds = ds;
+
+	while (fromds->ds_dir != findds->ds_dir) {
+		dsl_pool_t *dp = ds->ds_dir->dd_pool;
+
+		if (!dsl_dir_is_clone(findds->ds_dir)) {
+			if (relds)
+				dsl_dataset_rele(relds, FTAG);
+			return (EXDEV);
+		}
+
+		rw_enter(&dp->dp_config_rwlock, RW_READER);
+		err = dsl_dataset_hold_obj(dp,
+		    findds->ds_dir->dd_phys->dd_origin_obj, FTAG, &findds);
+		rw_exit(&dp->dp_config_rwlock);
+
+		if (relds)
+			dsl_dataset_rele(relds, FTAG);
+
+		if (err)
+			return (EXDEV);
+
+		relds = findds;
+	}
+
+	if (relds)
+		dsl_dataset_rele(relds, FTAG);
+
+	da.da_vp = vp;
+	da.da_offp = offp;
+	da.da_ddr.ddr_type = DDR_NONE;
+	da.da_ddr.ddr_first = da.da_ddr.ddr_last = 0;
+	da.da_err = 0;
+
+	err = traverse_dataset(ds, fromds->ds_phys->ds_creation_txg,
+	    TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA, diff_cb, &da);
+
+	if (err) {
+		da.da_err = err;
+	} else {
+		/* we set the da.da_err we return as side-effect */
+		(void) write_record(&da);
+	}
+
+	return (da.da_err);
+}
diff --git a/uts/common/fs/zfs/dmu_object.c b/uts/common/fs/zfs/dmu_object.c
new file mode 100644
index 000000000000..8dff46048902
--- /dev/null
+++ b/uts/common/fs/zfs/dmu_object.c
@@ -0,0 +1,196 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/dmu.h>
+#include <sys/dmu_objset.h>
+#include <sys/dmu_tx.h>
+#include <sys/dnode.h>
+
+uint64_t
+dmu_object_alloc(objset_t *os, dmu_object_type_t ot, int blocksize,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
+{
+	uint64_t object;
+	uint64_t L2_dnode_count = DNODES_PER_BLOCK <<
+	    (DMU_META_DNODE(os)->dn_indblkshift - SPA_BLKPTRSHIFT);
+	dnode_t *dn = NULL;
+	int restarted = B_FALSE;
+
+	mutex_enter(&os->os_obj_lock);
+	for (;;) {
+		object = os->os_obj_next;
+		/*
+		 * Each time we polish off an L2 bp worth of dnodes
+		 * (2^13 objects), move to another L2 bp that's still
+		 * reasonably sparse (at most 1/4 full).  Look from the
+		 * beginning once, but after that keep looking from here.
+		 * If we can't find one, just keep going from here.
+		 */
+		if (P2PHASE(object, L2_dnode_count) == 0) {
+			uint64_t offset = restarted ? object << DNODE_SHIFT : 0;
+			int error = dnode_next_offset(DMU_META_DNODE(os),
+			    DNODE_FIND_HOLE,
+			    &offset, 2, DNODES_PER_BLOCK >> 2, 0);
+			restarted = B_TRUE;
+			if (error == 0)
+				object = offset >> DNODE_SHIFT;
+		}
+		os->os_obj_next = ++object;
+
+		/*
+		 * XXX We should check for an i/o error here and return
+		 * up to our caller.  Actually we should pre-read it in
+		 * dmu_tx_assign(), but there is currently no mechanism
+		 * to do so.
+		 */
+		(void) dnode_hold_impl(os, object, DNODE_MUST_BE_FREE,
+		    FTAG, &dn);
+		if (dn)
+			break;
+
+		if (dmu_object_next(os, &object, B_TRUE, 0) == 0)
+			os->os_obj_next = object - 1;
+	}
+
+	dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx);
+	dnode_rele(dn, FTAG);
+
+	mutex_exit(&os->os_obj_lock);
+
+	dmu_tx_add_new_object(tx, os, object);
+	return (object);
+}
+
+int
+dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot,
+    int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	int err;
+
+	if (object == DMU_META_DNODE_OBJECT && !dmu_tx_private_ok(tx))
+		return (EBADF);
+
+	err = dnode_hold_impl(os, object, DNODE_MUST_BE_FREE, FTAG, &dn);
+	if (err)
+		return (err);
+	dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx);
+	dnode_rele(dn, FTAG);
+
+	dmu_tx_add_new_object(tx, os, object);
+	return (0);
+}
+
+int
+dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot,
+    int blocksize, dmu_object_type_t bonustype, int bonuslen)
+{
+	dnode_t *dn;
+	dmu_tx_t *tx;
+	int nblkptr;
+	int err;
+
+	if (object == DMU_META_DNODE_OBJECT)
+		return (EBADF);
+
+	err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED,
+	    FTAG, &dn);
+	if (err)
+		return (err);
+
+	if (dn->dn_type == ot && dn->dn_datablksz == blocksize &&
+	    dn->dn_bonustype == bonustype && dn->dn_bonuslen == bonuslen) {
+		/* nothing is changing, this is a noop */
+		dnode_rele(dn, FTAG);
+		return (0);
+	}
+
+	if (bonustype == DMU_OT_SA) {
+		nblkptr = 1;
+	} else {
+		nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT);
+	}
+
+	/*
+	 * If we are losing blkptrs or changing the block size this must
+	 * be a new file instance.   We must clear out the previous file
+	 * contents before we can change this type of metadata in the dnode.
+	 */
+	if (dn->dn_nblkptr > nblkptr || dn->dn_datablksz != blocksize) {
+		err = dmu_free_long_range(os, object, 0, DMU_OBJECT_END);
+		if (err)
+			goto out;
+	}
+
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_bonus(tx, object);
+	err = dmu_tx_assign(tx, TXG_WAIT);
+	if (err) {
+		dmu_tx_abort(tx);
+		goto out;
+	}
+
+	dnode_reallocate(dn, ot, blocksize, bonustype, bonuslen, tx);
+
+	dmu_tx_commit(tx);
+out:
+	dnode_rele(dn, FTAG);
+
+	return (err);
+}
+
+int
+dmu_object_free(objset_t *os, uint64_t object, dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	int err;
+
+	ASSERT(object != DMU_META_DNODE_OBJECT || dmu_tx_private_ok(tx));
+
+	err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED,
+	    FTAG, &dn);
+	if (err)
+		return (err);
+
+	ASSERT(dn->dn_type != DMU_OT_NONE);
+	dnode_free_range(dn, 0, DMU_OBJECT_END, tx);
+	dnode_free(dn, tx);
+	dnode_rele(dn, FTAG);
+
+	return (0);
+}
+
+int
+dmu_object_next(objset_t *os, uint64_t *objectp, boolean_t hole, uint64_t txg)
+{
+	uint64_t offset = (*objectp + 1) << DNODE_SHIFT;
+	int error;
+
+	error = dnode_next_offset(DMU_META_DNODE(os),
+	    (hole ? DNODE_FIND_HOLE : 0), &offset, 0, DNODES_PER_BLOCK, txg);
+
+	*objectp = offset >> DNODE_SHIFT;
+
+	return (error);
+}
diff --git a/uts/common/fs/zfs/dmu_objset.c b/uts/common/fs/zfs/dmu_objset.c
new file mode 100644
index 000000000000..7caebd979f02
--- /dev/null
+++ b/uts/common/fs/zfs/dmu_objset.c
@@ -0,0 +1,1789 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2010 Robert Milkowski */
+
+#include <sys/cred.h>
+#include <sys/zfs_context.h>
+#include <sys/dmu_objset.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_pool.h>
+#include <sys/dsl_synctask.h>
+#include <sys/dsl_deleg.h>
+#include <sys/dnode.h>
+#include <sys/dbuf.h>
+#include <sys/zvol.h>
+#include <sys/dmu_tx.h>
+#include <sys/zap.h>
+#include <sys/zil.h>
+#include <sys/dmu_impl.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/sa.h>
+#include <sys/zfs_onexit.h>
+
+/*
+ * Needed to close a window in dnode_move() that allows the objset to be freed
+ * before it can be safely accessed.
+ */
+krwlock_t os_lock;
+
+void
+dmu_objset_init(void)
+{
+	rw_init(&os_lock, NULL, RW_DEFAULT, NULL);
+}
+
+void
+dmu_objset_fini(void)
+{
+	rw_destroy(&os_lock);
+}
+
+spa_t *
+dmu_objset_spa(objset_t *os)
+{
+	return (os->os_spa);
+}
+
+zilog_t *
+dmu_objset_zil(objset_t *os)
+{
+	return (os->os_zil);
+}
+
+dsl_pool_t *
+dmu_objset_pool(objset_t *os)
+{
+	dsl_dataset_t *ds;
+
+	if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir)
+		return (ds->ds_dir->dd_pool);
+	else
+		return (spa_get_dsl(os->os_spa));
+}
+
+dsl_dataset_t *
+dmu_objset_ds(objset_t *os)
+{
+	return (os->os_dsl_dataset);
+}
+
+dmu_objset_type_t
+dmu_objset_type(objset_t *os)
+{
+	return (os->os_phys->os_type);
+}
+
+void
+dmu_objset_name(objset_t *os, char *buf)
+{
+	dsl_dataset_name(os->os_dsl_dataset, buf);
+}
+
+uint64_t
+dmu_objset_id(objset_t *os)
+{
+	dsl_dataset_t *ds = os->os_dsl_dataset;
+
+	return (ds ? ds->ds_object : 0);
+}
+
+uint64_t
+dmu_objset_syncprop(objset_t *os)
+{
+	return (os->os_sync);
+}
+
+uint64_t
+dmu_objset_logbias(objset_t *os)
+{
+	return (os->os_logbias);
+}
+
+static void
+checksum_changed_cb(void *arg, uint64_t newval)
+{
+	objset_t *os = arg;
+
+	/*
+	 * Inheritance should have been done by now.
+	 */
+	ASSERT(newval != ZIO_CHECKSUM_INHERIT);
+
+	os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE);
+}
+
+static void
+compression_changed_cb(void *arg, uint64_t newval)
+{
+	objset_t *os = arg;
+
+	/*
+	 * Inheritance and range checking should have been done by now.
+	 */
+	ASSERT(newval != ZIO_COMPRESS_INHERIT);
+
+	os->os_compress = zio_compress_select(newval, ZIO_COMPRESS_ON_VALUE);
+}
+
+static void
+copies_changed_cb(void *arg, uint64_t newval)
+{
+	objset_t *os = arg;
+
+	/*
+	 * Inheritance and range checking should have been done by now.
+	 */
+	ASSERT(newval > 0);
+	ASSERT(newval <= spa_max_replication(os->os_spa));
+
+	os->os_copies = newval;
+}
+
+static void
+dedup_changed_cb(void *arg, uint64_t newval)
+{
+	objset_t *os = arg;
+	spa_t *spa = os->os_spa;
+	enum zio_checksum checksum;
+
+	/*
+	 * Inheritance should have been done by now.
+	 */
+	ASSERT(newval != ZIO_CHECKSUM_INHERIT);
+
+	checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF);
+
+	os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK;
+	os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY);
+}
+
+static void
+primary_cache_changed_cb(void *arg, uint64_t newval)
+{
+	objset_t *os = arg;
+
+	/*
+	 * Inheritance and range checking should have been done by now.
+	 */
+	ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
+	    newval == ZFS_CACHE_METADATA);
+
+	os->os_primary_cache = newval;
+}
+
+static void
+secondary_cache_changed_cb(void *arg, uint64_t newval)
+{
+	objset_t *os = arg;
+
+	/*
+	 * Inheritance and range checking should have been done by now.
+	 */
+	ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
+	    newval == ZFS_CACHE_METADATA);
+
+	os->os_secondary_cache = newval;
+}
+
+static void
+sync_changed_cb(void *arg, uint64_t newval)
+{
+	objset_t *os = arg;
+
+	/*
+	 * Inheritance and range checking should have been done by now.
+	 */
+	ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS ||
+	    newval == ZFS_SYNC_DISABLED);
+
+	os->os_sync = newval;
+	if (os->os_zil)
+		zil_set_sync(os->os_zil, newval);
+}
+
+static void
+logbias_changed_cb(void *arg, uint64_t newval)
+{
+	objset_t *os = arg;
+
+	ASSERT(newval == ZFS_LOGBIAS_LATENCY ||
+	    newval == ZFS_LOGBIAS_THROUGHPUT);
+	os->os_logbias = newval;
+	if (os->os_zil)
+		zil_set_logbias(os->os_zil, newval);
+}
+
+void
+dmu_objset_byteswap(void *buf, size_t size)
+{
+	objset_phys_t *osp = buf;
+
+	ASSERT(size == OBJSET_OLD_PHYS_SIZE || size == sizeof (objset_phys_t));
+	dnode_byteswap(&osp->os_meta_dnode);
+	byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t));
+	osp->os_type = BSWAP_64(osp->os_type);
+	osp->os_flags = BSWAP_64(osp->os_flags);
+	if (size == sizeof (objset_phys_t)) {
+		dnode_byteswap(&osp->os_userused_dnode);
+		dnode_byteswap(&osp->os_groupused_dnode);
+	}
+}
+
+int
+dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
+    objset_t **osp)
+{
+	objset_t *os;
+	int i, err;
+
+	ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock));
+
+	os = kmem_zalloc(sizeof (objset_t), KM_SLEEP);
+	os->os_dsl_dataset = ds;
+	os->os_spa = spa;
+	os->os_rootbp = bp;
+	if (!BP_IS_HOLE(os->os_rootbp)) {
+		uint32_t aflags = ARC_WAIT;
+		zbookmark_t zb;
+		SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET,
+		    ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
+
+		if (DMU_OS_IS_L2CACHEABLE(os))
+			aflags |= ARC_L2CACHE;
+
+		dprintf_bp(os->os_rootbp, "reading %s", "");
+		/*
+		 * XXX when bprewrite scrub can change the bp,
+		 * and this is called from dmu_objset_open_ds_os, the bp
+		 * could change, and we'll need a lock.
+		 */
+		err = dsl_read_nolock(NULL, spa, os->os_rootbp,
+		    arc_getbuf_func, &os->os_phys_buf,
+		    ZIO_PRIORITY_SYNC_READ, ZIO_FLAG_CANFAIL, &aflags, &zb);
+		if (err) {
+			kmem_free(os, sizeof (objset_t));
+			/* convert checksum errors into IO errors */
+			if (err == ECKSUM)
+				err = EIO;
+			return (err);
+		}
+
+		/* Increase the blocksize if we are permitted. */
+		if (spa_version(spa) >= SPA_VERSION_USERSPACE &&
+		    arc_buf_size(os->os_phys_buf) < sizeof (objset_phys_t)) {
+			arc_buf_t *buf = arc_buf_alloc(spa,
+			    sizeof (objset_phys_t), &os->os_phys_buf,
+			    ARC_BUFC_METADATA);
+			bzero(buf->b_data, sizeof (objset_phys_t));
+			bcopy(os->os_phys_buf->b_data, buf->b_data,
+			    arc_buf_size(os->os_phys_buf));
+			(void) arc_buf_remove_ref(os->os_phys_buf,
+			    &os->os_phys_buf);
+			os->os_phys_buf = buf;
+		}
+
+		os->os_phys = os->os_phys_buf->b_data;
+		os->os_flags = os->os_phys->os_flags;
+	} else {
+		int size = spa_version(spa) >= SPA_VERSION_USERSPACE ?
+		    sizeof (objset_phys_t) : OBJSET_OLD_PHYS_SIZE;
+		os->os_phys_buf = arc_buf_alloc(spa, size,
+		    &os->os_phys_buf, ARC_BUFC_METADATA);
+		os->os_phys = os->os_phys_buf->b_data;
+		bzero(os->os_phys, size);
+	}
+
+	/*
+	 * Note: the changed_cb will be called once before the register
+	 * func returns, thus changing the checksum/compression from the
+	 * default (fletcher2/off).  Snapshots don't need to know about
+	 * checksum/compression/copies.
+	 */
+	if (ds) {
+		err = dsl_prop_register(ds, "primarycache",
+		    primary_cache_changed_cb, os);
+		if (err == 0)
+			err = dsl_prop_register(ds, "secondarycache",
+			    secondary_cache_changed_cb, os);
+		if (!dsl_dataset_is_snapshot(ds)) {
+			if (err == 0)
+				err = dsl_prop_register(ds, "checksum",
+				    checksum_changed_cb, os);
+			if (err == 0)
+				err = dsl_prop_register(ds, "compression",
+				    compression_changed_cb, os);
+			if (err == 0)
+				err = dsl_prop_register(ds, "copies",
+				    copies_changed_cb, os);
+			if (err == 0)
+				err = dsl_prop_register(ds, "dedup",
+				    dedup_changed_cb, os);
+			if (err == 0)
+				err = dsl_prop_register(ds, "logbias",
+				    logbias_changed_cb, os);
+			if (err == 0)
+				err = dsl_prop_register(ds, "sync",
+				    sync_changed_cb, os);
+		}
+		if (err) {
+			VERIFY(arc_buf_remove_ref(os->os_phys_buf,
+			    &os->os_phys_buf) == 1);
+			kmem_free(os, sizeof (objset_t));
+			return (err);
+		}
+	} else if (ds == NULL) {
+		/* It's the meta-objset. */
+		os->os_checksum = ZIO_CHECKSUM_FLETCHER_4;
+		os->os_compress = ZIO_COMPRESS_LZJB;
+		os->os_copies = spa_max_replication(spa);
+		os->os_dedup_checksum = ZIO_CHECKSUM_OFF;
+		os->os_dedup_verify = 0;
+		os->os_logbias = 0;
+		os->os_sync = 0;
+		os->os_primary_cache = ZFS_CACHE_ALL;
+		os->os_secondary_cache = ZFS_CACHE_ALL;
+	}
+
+	if (ds == NULL || !dsl_dataset_is_snapshot(ds))
+		os->os_zil_header = os->os_phys->os_zil_header;
+	os->os_zil = zil_alloc(os, &os->os_zil_header);
+
+	for (i = 0; i < TXG_SIZE; i++) {
+		list_create(&os->os_dirty_dnodes[i], sizeof (dnode_t),
+		    offsetof(dnode_t, dn_dirty_link[i]));
+		list_create(&os->os_free_dnodes[i], sizeof (dnode_t),
+		    offsetof(dnode_t, dn_dirty_link[i]));
+	}
+	list_create(&os->os_dnodes, sizeof (dnode_t),
+	    offsetof(dnode_t, dn_link));
+	list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t),
+	    offsetof(dmu_buf_impl_t, db_link));
+
+	mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	DMU_META_DNODE(os) = dnode_special_open(os,
+	    &os->os_phys->os_meta_dnode, DMU_META_DNODE_OBJECT,
+	    &os->os_meta_dnode);
+	if (arc_buf_size(os->os_phys_buf) >= sizeof (objset_phys_t)) {
+		DMU_USERUSED_DNODE(os) = dnode_special_open(os,
+		    &os->os_phys->os_userused_dnode, DMU_USERUSED_OBJECT,
+		    &os->os_userused_dnode);
+		DMU_GROUPUSED_DNODE(os) = dnode_special_open(os,
+		    &os->os_phys->os_groupused_dnode, DMU_GROUPUSED_OBJECT,
+		    &os->os_groupused_dnode);
+	}
+
+	/*
+	 * We should be the only thread trying to do this because we
+	 * have ds_opening_lock
+	 */
+	if (ds) {
+		mutex_enter(&ds->ds_lock);
+		ASSERT(ds->ds_objset == NULL);
+		ds->ds_objset = os;
+		mutex_exit(&ds->ds_lock);
+	}
+
+	*osp = os;
+	return (0);
+}
+
+int
+dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp)
+{
+	int err = 0;
+
+	mutex_enter(&ds->ds_opening_lock);
+	*osp = ds->ds_objset;
+	if (*osp == NULL) {
+		err = dmu_objset_open_impl(dsl_dataset_get_spa(ds),
+		    ds, dsl_dataset_get_blkptr(ds), osp);
+	}
+	mutex_exit(&ds->ds_opening_lock);
+	return (err);
+}
+
+/* called from zpl */
+int
+dmu_objset_hold(const char *name, void *tag, objset_t **osp)
+{
+	dsl_dataset_t *ds;
+	int err;
+
+	err = dsl_dataset_hold(name, tag, &ds);
+	if (err)
+		return (err);
+
+	err = dmu_objset_from_ds(ds, osp);
+	if (err)
+		dsl_dataset_rele(ds, tag);
+
+	return (err);
+}
+
+/* called from zpl */
+int
+dmu_objset_own(const char *name, dmu_objset_type_t type,
+    boolean_t readonly, void *tag, objset_t **osp)
+{
+	dsl_dataset_t *ds;
+	int err;
+
+	err = dsl_dataset_own(name, B_FALSE, tag, &ds);
+	if (err)
+		return (err);
+
+	err = dmu_objset_from_ds(ds, osp);
+	if (err) {
+		dsl_dataset_disown(ds, tag);
+	} else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) {
+		dmu_objset_disown(*osp, tag);
+		return (EINVAL);
+	} else if (!readonly && dsl_dataset_is_snapshot(ds)) {
+		dmu_objset_disown(*osp, tag);
+		return (EROFS);
+	}
+	return (err);
+}
+
+void
+dmu_objset_rele(objset_t *os, void *tag)
+{
+	dsl_dataset_rele(os->os_dsl_dataset, tag);
+}
+
+void
+dmu_objset_disown(objset_t *os, void *tag)
+{
+	dsl_dataset_disown(os->os_dsl_dataset, tag);
+}
+
+int
+dmu_objset_evict_dbufs(objset_t *os)
+{
+	dnode_t *dn;
+
+	mutex_enter(&os->os_lock);
+
+	/* process the mdn last, since the other dnodes have holds on it */
+	list_remove(&os->os_dnodes, DMU_META_DNODE(os));
+	list_insert_tail(&os->os_dnodes, DMU_META_DNODE(os));
+
+	/*
+	 * Find the first dnode with holds.  We have to do this dance
+	 * because dnode_add_ref() only works if you already have a
+	 * hold.  If there are no holds then it has no dbufs so OK to
+	 * skip.
+	 */
+	for (dn = list_head(&os->os_dnodes);
+	    dn && !dnode_add_ref(dn, FTAG);
+	    dn = list_next(&os->os_dnodes, dn))
+		continue;
+
+	while (dn) {
+		dnode_t *next_dn = dn;
+
+		do {
+			next_dn = list_next(&os->os_dnodes, next_dn);
+		} while (next_dn && !dnode_add_ref(next_dn, FTAG));
+
+		mutex_exit(&os->os_lock);
+		dnode_evict_dbufs(dn);
+		dnode_rele(dn, FTAG);
+		mutex_enter(&os->os_lock);
+		dn = next_dn;
+	}
+	dn = list_head(&os->os_dnodes);
+	mutex_exit(&os->os_lock);
+	return (dn != DMU_META_DNODE(os));
+}
+
+void
+dmu_objset_evict(objset_t *os)
+{
+	dsl_dataset_t *ds = os->os_dsl_dataset;
+
+	for (int t = 0; t < TXG_SIZE; t++)
+		ASSERT(!dmu_objset_is_dirty(os, t));
+
+	if (ds) {
+		if (!dsl_dataset_is_snapshot(ds)) {
+			VERIFY(0 == dsl_prop_unregister(ds, "checksum",
+			    checksum_changed_cb, os));
+			VERIFY(0 == dsl_prop_unregister(ds, "compression",
+			    compression_changed_cb, os));
+			VERIFY(0 == dsl_prop_unregister(ds, "copies",
+			    copies_changed_cb, os));
+			VERIFY(0 == dsl_prop_unregister(ds, "dedup",
+			    dedup_changed_cb, os));
+			VERIFY(0 == dsl_prop_unregister(ds, "logbias",
+			    logbias_changed_cb, os));
+			VERIFY(0 == dsl_prop_unregister(ds, "sync",
+			    sync_changed_cb, os));
+		}
+		VERIFY(0 == dsl_prop_unregister(ds, "primarycache",
+		    primary_cache_changed_cb, os));
+		VERIFY(0 == dsl_prop_unregister(ds, "secondarycache",
+		    secondary_cache_changed_cb, os));
+	}
+
+	if (os->os_sa)
+		sa_tear_down(os);
+
+	/*
+	 * We should need only a single pass over the dnode list, since
+	 * nothing can be added to the list at this point.
+	 */
+	(void) dmu_objset_evict_dbufs(os);
+
+	dnode_special_close(&os->os_meta_dnode);
+	if (DMU_USERUSED_DNODE(os)) {
+		dnode_special_close(&os->os_userused_dnode);
+		dnode_special_close(&os->os_groupused_dnode);
+	}
+	zil_free(os->os_zil);
+
+	ASSERT3P(list_head(&os->os_dnodes), ==, NULL);
+
+	VERIFY(arc_buf_remove_ref(os->os_phys_buf, &os->os_phys_buf) == 1);
+
+	/*
+	 * This is a barrier to prevent the objset from going away in
+	 * dnode_move() until we can safely ensure that the objset is still in
+	 * use. We consider the objset valid before the barrier and invalid
+	 * after the barrier.
+	 */
+	rw_enter(&os_lock, RW_READER);
+	rw_exit(&os_lock);
+
+	mutex_destroy(&os->os_lock);
+	mutex_destroy(&os->os_obj_lock);
+	mutex_destroy(&os->os_user_ptr_lock);
+	kmem_free(os, sizeof (objset_t));
+}
+
+timestruc_t
+dmu_objset_snap_cmtime(objset_t *os)
+{
+	return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir));
+}
+
+/* called from dsl for meta-objset */
+objset_t *
+dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
+    dmu_objset_type_t type, dmu_tx_t *tx)
+{
+	objset_t *os;
+	dnode_t *mdn;
+
+	ASSERT(dmu_tx_is_syncing(tx));
+	if (ds != NULL)
+		VERIFY(0 == dmu_objset_from_ds(ds, &os));
+	else
+		VERIFY(0 == dmu_objset_open_impl(spa, NULL, bp, &os));
+
+	mdn = DMU_META_DNODE(os);
+
+	dnode_allocate(mdn, DMU_OT_DNODE, 1 << DNODE_BLOCK_SHIFT,
+	    DN_MAX_INDBLKSHIFT, DMU_OT_NONE, 0, tx);
+
+	/*
+	 * We don't want to have to increase the meta-dnode's nlevels
+	 * later, because then we could do it in quescing context while
+	 * we are also accessing it in open context.
+	 *
+	 * This precaution is not necessary for the MOS (ds == NULL),
+	 * because the MOS is only updated in syncing context.
+	 * This is most fortunate: the MOS is the only objset that
+	 * needs to be synced multiple times as spa_sync() iterates
+	 * to convergence, so minimizing its dn_nlevels matters.
+	 */
+	if (ds != NULL) {
+		int levels = 1;
+
+		/*
+		 * Determine the number of levels necessary for the meta-dnode
+		 * to contain DN_MAX_OBJECT dnodes.
+		 */
+		while ((uint64_t)mdn->dn_nblkptr << (mdn->dn_datablkshift +
+		    (levels - 1) * (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) <
+		    DN_MAX_OBJECT * sizeof (dnode_phys_t))
+			levels++;
+
+		mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] =
+		    mdn->dn_nlevels = levels;
+	}
+
+	ASSERT(type != DMU_OST_NONE);
+	ASSERT(type != DMU_OST_ANY);
+	ASSERT(type < DMU_OST_NUMTYPES);
+	os->os_phys->os_type = type;
+	if (dmu_objset_userused_enabled(os)) {
+		os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
+		os->os_flags = os->os_phys->os_flags;
+	}
+
+	dsl_dataset_dirty(ds, tx);
+
+	return (os);
+}
+
+struct oscarg {
+	void (*userfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
+	void *userarg;
+	dsl_dataset_t *clone_origin;
+	const char *lastname;
+	dmu_objset_type_t type;
+	uint64_t flags;
+	cred_t *cr;
+};
+
+/*ARGSUSED*/
+static int
+dmu_objset_create_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dir_t *dd = arg1;
+	struct oscarg *oa = arg2;
+	objset_t *mos = dd->dd_pool->dp_meta_objset;
+	int err;
+	uint64_t ddobj;
+
+	err = zap_lookup(mos, dd->dd_phys->dd_child_dir_zapobj,
+	    oa->lastname, sizeof (uint64_t), 1, &ddobj);
+	if (err != ENOENT)
+		return (err ? err : EEXIST);
+
+	if (oa->clone_origin != NULL) {
+		/* You can't clone across pools. */
+		if (oa->clone_origin->ds_dir->dd_pool != dd->dd_pool)
+			return (EXDEV);
+
+		/* You can only clone snapshots, not the head datasets. */
+		if (!dsl_dataset_is_snapshot(oa->clone_origin))
+			return (EINVAL);
+	}
+
+	return (0);
+}
+
+static void
+dmu_objset_create_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dir_t *dd = arg1;
+	spa_t *spa = dd->dd_pool->dp_spa;
+	struct oscarg *oa = arg2;
+	uint64_t obj;
+
+	ASSERT(dmu_tx_is_syncing(tx));
+
+	obj = dsl_dataset_create_sync(dd, oa->lastname,
+	    oa->clone_origin, oa->flags, oa->cr, tx);
+
+	if (oa->clone_origin == NULL) {
+		dsl_pool_t *dp = dd->dd_pool;
+		dsl_dataset_t *ds;
+		blkptr_t *bp;
+		objset_t *os;
+
+		VERIFY3U(0, ==, dsl_dataset_hold_obj(dp, obj, FTAG, &ds));
+		bp = dsl_dataset_get_blkptr(ds);
+		ASSERT(BP_IS_HOLE(bp));
+
+		os = dmu_objset_create_impl(spa, ds, bp, oa->type, tx);
+
+		if (oa->userfunc)
+			oa->userfunc(os, oa->userarg, oa->cr, tx);
+		dsl_dataset_rele(ds, FTAG);
+	}
+
+	spa_history_log_internal(LOG_DS_CREATE, spa, tx, "dataset = %llu", obj);
+}
+
+int
+dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
+    void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg)
+{
+	dsl_dir_t *pdd;
+	const char *tail;
+	int err = 0;
+	struct oscarg oa = { 0 };
+
+	ASSERT(strchr(name, '@') == NULL);
+	err = dsl_dir_open(name, FTAG, &pdd, &tail);
+	if (err)
+		return (err);
+	if (tail == NULL) {
+		dsl_dir_close(pdd, FTAG);
+		return (EEXIST);
+	}
+
+	oa.userfunc = func;
+	oa.userarg = arg;
+	oa.lastname = tail;
+	oa.type = type;
+	oa.flags = flags;
+	oa.cr = CRED();
+
+	err = dsl_sync_task_do(pdd->dd_pool, dmu_objset_create_check,
+	    dmu_objset_create_sync, pdd, &oa, 5);
+	dsl_dir_close(pdd, FTAG);
+	return (err);
+}
+
+int
+dmu_objset_clone(const char *name, dsl_dataset_t *clone_origin, uint64_t flags)
+{
+	dsl_dir_t *pdd;
+	const char *tail;
+	int err = 0;
+	struct oscarg oa = { 0 };
+
+	ASSERT(strchr(name, '@') == NULL);
+	err = dsl_dir_open(name, FTAG, &pdd, &tail);
+	if (err)
+		return (err);
+	if (tail == NULL) {
+		dsl_dir_close(pdd, FTAG);
+		return (EEXIST);
+	}
+
+	oa.lastname = tail;
+	oa.clone_origin = clone_origin;
+	oa.flags = flags;
+	oa.cr = CRED();
+
+	err = dsl_sync_task_do(pdd->dd_pool, dmu_objset_create_check,
+	    dmu_objset_create_sync, pdd, &oa, 5);
+	dsl_dir_close(pdd, FTAG);
+	return (err);
+}
+
+int
+dmu_objset_destroy(const char *name, boolean_t defer)
+{
+	dsl_dataset_t *ds;
+	int error;
+
+	error = dsl_dataset_own(name, B_TRUE, FTAG, &ds);
+	if (error == 0) {
+		error = dsl_dataset_destroy(ds, FTAG, defer);
+		/* dsl_dataset_destroy() closes the ds. */
+	}
+
+	return (error);
+}
+
+struct snaparg {
+	dsl_sync_task_group_t *dstg;
+	char *snapname;
+	char *htag;
+	char failed[MAXPATHLEN];
+	boolean_t recursive;
+	boolean_t needsuspend;
+	boolean_t temporary;
+	nvlist_t *props;
+	struct dsl_ds_holdarg *ha;	/* only needed in the temporary case */
+	dsl_dataset_t *newds;
+};
+
+static int
+snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	objset_t *os = arg1;
+	struct snaparg *sn = arg2;
+	int error;
+
+	/* The props have already been checked by zfs_check_userprops(). */
+
+	error = dsl_dataset_snapshot_check(os->os_dsl_dataset,
+	    sn->snapname, tx);
+	if (error)
+		return (error);
+
+	if (sn->temporary) {
+		/*
+		 * Ideally we would just call
+		 * dsl_dataset_user_hold_check() and
+		 * dsl_dataset_destroy_check() here.  However the
+		 * dataset we want to hold and destroy is the snapshot
+		 * that we just confirmed we can create, but it won't
+		 * exist until after these checks are run.  Do any
+		 * checks we can here and if more checks are added to
+		 * those routines in the future, similar checks may be
+		 * necessary here.
+		 */
+		if (spa_version(os->os_spa) < SPA_VERSION_USERREFS)
+			return (ENOTSUP);
+		/*
+		 * Not checking number of tags because the tag will be
+		 * unique, as it will be the only tag.
+		 */
+		if (strlen(sn->htag) + MAX_TAG_PREFIX_LEN >= MAXNAMELEN)
+			return (E2BIG);
+
+		sn->ha = kmem_alloc(sizeof (struct dsl_ds_holdarg), KM_SLEEP);
+		sn->ha->temphold = B_TRUE;
+		sn->ha->htag = sn->htag;
+	}
+	return (error);
+}
+
+static void
+snapshot_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	objset_t *os = arg1;
+	dsl_dataset_t *ds = os->os_dsl_dataset;
+	struct snaparg *sn = arg2;
+
+	dsl_dataset_snapshot_sync(ds, sn->snapname, tx);
+
+	if (sn->props) {
+		dsl_props_arg_t pa;
+		pa.pa_props = sn->props;
+		pa.pa_source = ZPROP_SRC_LOCAL;
+		dsl_props_set_sync(ds->ds_prev, &pa, tx);
+	}
+
+	if (sn->temporary) {
+		struct dsl_ds_destroyarg da;
+
+		dsl_dataset_user_hold_sync(ds->ds_prev, sn->ha, tx);
+		kmem_free(sn->ha, sizeof (struct dsl_ds_holdarg));
+		sn->ha = NULL;
+		sn->newds = ds->ds_prev;
+
+		da.ds = ds->ds_prev;
+		da.defer = B_TRUE;
+		dsl_dataset_destroy_sync(&da, FTAG, tx);
+	}
+}
+
+static int
+dmu_objset_snapshot_one(const char *name, void *arg)
+{
+	struct snaparg *sn = arg;
+	objset_t *os;
+	int err;
+	char *cp;
+
+	/*
+	 * If the objset starts with a '%', then ignore it unless it was
+	 * explicitly named (ie, not recursive).  These hidden datasets
+	 * are always inconsistent, and by not opening them here, we can
+	 * avoid a race with dsl_dir_destroy_check().
+	 */
+	cp = strrchr(name, '/');
+	if (cp && cp[1] == '%' && sn->recursive)
+		return (0);
+
+	(void) strcpy(sn->failed, name);
+
+	/*
+	 * Check permissions if we are doing a recursive snapshot.  The
+	 * permission checks for the starting dataset have already been
+	 * performed in zfs_secpolicy_snapshot()
+	 */
+	if (sn->recursive && (err = zfs_secpolicy_snapshot_perms(name, CRED())))
+		return (err);
+
+	err = dmu_objset_hold(name, sn, &os);
+	if (err != 0)
+		return (err);
+
+	/*
+	 * If the objset is in an inconsistent state (eg, in the process
+	 * of being destroyed), don't snapshot it.  As with %hidden
+	 * datasets, we return EBUSY if this name was explicitly
+	 * requested (ie, not recursive), and otherwise ignore it.
+	 */
+	if (os->os_dsl_dataset->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) {
+		dmu_objset_rele(os, sn);
+		return (sn->recursive ? 0 : EBUSY);
+	}
+
+	if (sn->needsuspend) {
+		err = zil_suspend(dmu_objset_zil(os));
+		if (err) {
+			dmu_objset_rele(os, sn);
+			return (err);
+		}
+	}
+	dsl_sync_task_create(sn->dstg, snapshot_check, snapshot_sync,
+	    os, sn, 3);
+
+	return (0);
+}
+
+int
+dmu_objset_snapshot(char *fsname, char *snapname, char *tag,
+    nvlist_t *props, boolean_t recursive, boolean_t temporary, int cleanup_fd)
+{
+	dsl_sync_task_t *dst;
+	struct snaparg sn;
+	spa_t *spa;
+	minor_t minor;
+	int err;
+
+	(void) strcpy(sn.failed, fsname);
+
+	err = spa_open(fsname, &spa, FTAG);
+	if (err)
+		return (err);
+
+	if (temporary) {
+		if (cleanup_fd < 0) {
+			spa_close(spa, FTAG);
+			return (EINVAL);
+		}
+		if ((err = zfs_onexit_fd_hold(cleanup_fd, &minor)) != 0) {
+			spa_close(spa, FTAG);
+			return (err);
+		}
+	}
+
+	sn.dstg = dsl_sync_task_group_create(spa_get_dsl(spa));
+	sn.snapname = snapname;
+	sn.htag = tag;
+	sn.props = props;
+	sn.recursive = recursive;
+	sn.needsuspend = (spa_version(spa) < SPA_VERSION_FAST_SNAP);
+	sn.temporary = temporary;
+	sn.ha = NULL;
+	sn.newds = NULL;
+
+	if (recursive) {
+		err = dmu_objset_find(fsname,
+		    dmu_objset_snapshot_one, &sn, DS_FIND_CHILDREN);
+	} else {
+		err = dmu_objset_snapshot_one(fsname, &sn);
+	}
+
+	if (err == 0)
+		err = dsl_sync_task_group_wait(sn.dstg);
+
+	for (dst = list_head(&sn.dstg->dstg_tasks); dst;
+	    dst = list_next(&sn.dstg->dstg_tasks, dst)) {
+		objset_t *os = dst->dst_arg1;
+		dsl_dataset_t *ds = os->os_dsl_dataset;
+		if (dst->dst_err) {
+			dsl_dataset_name(ds, sn.failed);
+		} else if (temporary) {
+			dsl_register_onexit_hold_cleanup(sn.newds, tag, minor);
+		}
+		if (sn.needsuspend)
+			zil_resume(dmu_objset_zil(os));
+		dmu_objset_rele(os, &sn);
+	}
+
+	if (err)
+		(void) strcpy(fsname, sn.failed);
+	if (temporary)
+		zfs_onexit_fd_rele(cleanup_fd);
+	dsl_sync_task_group_destroy(sn.dstg);
+	spa_close(spa, FTAG);
+	return (err);
+}
+
+static void
+dmu_objset_sync_dnodes(list_t *list, list_t *newlist, dmu_tx_t *tx)
+{
+	dnode_t *dn;
+
+	while (dn = list_head(list)) {
+		ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
+		ASSERT(dn->dn_dbuf->db_data_pending);
+		/*
+		 * Initialize dn_zio outside dnode_sync() because the
+		 * meta-dnode needs to set it ouside dnode_sync().
+		 */
+		dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio;
+		ASSERT(dn->dn_zio);
+
+		ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS);
+		list_remove(list, dn);
+
+		if (newlist) {
+			(void) dnode_add_ref(dn, newlist);
+			list_insert_tail(newlist, dn);
+		}
+
+		dnode_sync(dn, tx);
+	}
+}
+
+/* ARGSUSED */
+static void
+dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg)
+{
+	blkptr_t *bp = zio->io_bp;
+	objset_t *os = arg;
+	dnode_phys_t *dnp = &os->os_phys->os_meta_dnode;
+
+	ASSERT(bp == os->os_rootbp);
+	ASSERT(BP_GET_TYPE(bp) == DMU_OT_OBJSET);
+	ASSERT(BP_GET_LEVEL(bp) == 0);
+
+	/*
+	 * Update rootbp fill count: it should be the number of objects
+	 * allocated in the object set (not counting the "special"
+	 * objects that are stored in the objset_phys_t -- the meta
+	 * dnode and user/group accounting objects).
+	 */
+	bp->blk_fill = 0;
+	for (int i = 0; i < dnp->dn_nblkptr; i++)
+		bp->blk_fill += dnp->dn_blkptr[i].blk_fill;
+}
+
+/* ARGSUSED */
+static void
+dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg)
+{
+	blkptr_t *bp = zio->io_bp;
+	blkptr_t *bp_orig = &zio->io_bp_orig;
+	objset_t *os = arg;
+
+	if (zio->io_flags & ZIO_FLAG_IO_REWRITE) {
+		ASSERT(BP_EQUAL(bp, bp_orig));
+	} else {
+		dsl_dataset_t *ds = os->os_dsl_dataset;
+		dmu_tx_t *tx = os->os_synctx;
+
+		(void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE);
+		dsl_dataset_block_born(ds, bp, tx);
+	}
+}
+
+/* called from dsl */
+void
+dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx)
+{
+	int txgoff;
+	zbookmark_t zb;
+	zio_prop_t zp;
+	zio_t *zio;
+	list_t *list;
+	list_t *newlist = NULL;
+	dbuf_dirty_record_t *dr;
+
+	dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", tx->tx_txg);
+
+	ASSERT(dmu_tx_is_syncing(tx));
+	/* XXX the write_done callback should really give us the tx... */
+	os->os_synctx = tx;
+
+	if (os->os_dsl_dataset == NULL) {
+		/*
+		 * This is the MOS.  If we have upgraded,
+		 * spa_max_replication() could change, so reset
+		 * os_copies here.
+		 */
+		os->os_copies = spa_max_replication(os->os_spa);
+	}
+
+	/*
+	 * Create the root block IO
+	 */
+	SET_BOOKMARK(&zb, os->os_dsl_dataset ?
+	    os->os_dsl_dataset->ds_object : DMU_META_OBJSET,
+	    ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
+	VERIFY3U(0, ==, arc_release_bp(os->os_phys_buf, &os->os_phys_buf,
+	    os->os_rootbp, os->os_spa, &zb));
+
+	dmu_write_policy(os, NULL, 0, 0, &zp);
+
+	zio = arc_write(pio, os->os_spa, tx->tx_txg,
+	    os->os_rootbp, os->os_phys_buf, DMU_OS_IS_L2CACHEABLE(os), &zp,
+	    dmu_objset_write_ready, dmu_objset_write_done, os,
+	    ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
+
+	/*
+	 * Sync special dnodes - the parent IO for the sync is the root block
+	 */
+	DMU_META_DNODE(os)->dn_zio = zio;
+	dnode_sync(DMU_META_DNODE(os), tx);
+
+	os->os_phys->os_flags = os->os_flags;
+
+	if (DMU_USERUSED_DNODE(os) &&
+	    DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) {
+		DMU_USERUSED_DNODE(os)->dn_zio = zio;
+		dnode_sync(DMU_USERUSED_DNODE(os), tx);
+		DMU_GROUPUSED_DNODE(os)->dn_zio = zio;
+		dnode_sync(DMU_GROUPUSED_DNODE(os), tx);
+	}
+
+	txgoff = tx->tx_txg & TXG_MASK;
+
+	if (dmu_objset_userused_enabled(os)) {
+		newlist = &os->os_synced_dnodes;
+		/*
+		 * We must create the list here because it uses the
+		 * dn_dirty_link[] of this txg.
+		 */
+		list_create(newlist, sizeof (dnode_t),
+		    offsetof(dnode_t, dn_dirty_link[txgoff]));
+	}
+
+	dmu_objset_sync_dnodes(&os->os_free_dnodes[txgoff], newlist, tx);
+	dmu_objset_sync_dnodes(&os->os_dirty_dnodes[txgoff], newlist, tx);
+
+	list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff];
+	while (dr = list_head(list)) {
+		ASSERT(dr->dr_dbuf->db_level == 0);
+		list_remove(list, dr);
+		if (dr->dr_zio)
+			zio_nowait(dr->dr_zio);
+	}
+	/*
+	 * Free intent log blocks up to this tx.
+	 */
+	zil_sync(os->os_zil, tx);
+	os->os_phys->os_zil_header = os->os_zil_header;
+	zio_nowait(zio);
+}
+
+boolean_t
+dmu_objset_is_dirty(objset_t *os, uint64_t txg)
+{
+	return (!list_is_empty(&os->os_dirty_dnodes[txg & TXG_MASK]) ||
+	    !list_is_empty(&os->os_free_dnodes[txg & TXG_MASK]));
+}
+
+boolean_t
+dmu_objset_is_dirty_anywhere(objset_t *os)
+{
+	for (int t = 0; t < TXG_SIZE; t++)
+		if (dmu_objset_is_dirty(os, t))
+			return (B_TRUE);
+	return (B_FALSE);
+}
+
+static objset_used_cb_t *used_cbs[DMU_OST_NUMTYPES];
+
+void
+dmu_objset_register_type(dmu_objset_type_t ost, objset_used_cb_t *cb)
+{
+	used_cbs[ost] = cb;
+}
+
+boolean_t
+dmu_objset_userused_enabled(objset_t *os)
+{
+	return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE &&
+	    used_cbs[os->os_phys->os_type] != NULL &&
+	    DMU_USERUSED_DNODE(os) != NULL);
+}
+
+static void
+do_userquota_update(objset_t *os, uint64_t used, uint64_t flags,
+    uint64_t user, uint64_t group, boolean_t subtract, dmu_tx_t *tx)
+{
+	if ((flags & DNODE_FLAG_USERUSED_ACCOUNTED)) {
+		int64_t delta = DNODE_SIZE + used;
+		if (subtract)
+			delta = -delta;
+		VERIFY3U(0, ==, zap_increment_int(os, DMU_USERUSED_OBJECT,
+		    user, delta, tx));
+		VERIFY3U(0, ==, zap_increment_int(os, DMU_GROUPUSED_OBJECT,
+		    group, delta, tx));
+	}
+}
+
+void
+dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	list_t *list = &os->os_synced_dnodes;
+
+	ASSERT(list_head(list) == NULL || dmu_objset_userused_enabled(os));
+
+	while (dn = list_head(list)) {
+		int flags;
+		ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object));
+		ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE ||
+		    dn->dn_phys->dn_flags &
+		    DNODE_FLAG_USERUSED_ACCOUNTED);
+
+		/* Allocate the user/groupused objects if necessary. */
+		if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) {
+			VERIFY(0 == zap_create_claim(os,
+			    DMU_USERUSED_OBJECT,
+			    DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
+			VERIFY(0 == zap_create_claim(os,
+			    DMU_GROUPUSED_OBJECT,
+			    DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
+		}
+
+		/*
+		 * We intentionally modify the zap object even if the
+		 * net delta is zero.  Otherwise
+		 * the block of the zap obj could be shared between
+		 * datasets but need to be different between them after
+		 * a bprewrite.
+		 */
+
+		flags = dn->dn_id_flags;
+		ASSERT(flags);
+		if (flags & DN_ID_OLD_EXIST)  {
+			do_userquota_update(os, dn->dn_oldused, dn->dn_oldflags,
+			    dn->dn_olduid, dn->dn_oldgid, B_TRUE, tx);
+		}
+		if (flags & DN_ID_NEW_EXIST) {
+			do_userquota_update(os, DN_USED_BYTES(dn->dn_phys),
+			    dn->dn_phys->dn_flags,  dn->dn_newuid,
+			    dn->dn_newgid, B_FALSE, tx);
+		}
+
+		mutex_enter(&dn->dn_mtx);
+		dn->dn_oldused = 0;
+		dn->dn_oldflags = 0;
+		if (dn->dn_id_flags & DN_ID_NEW_EXIST) {
+			dn->dn_olduid = dn->dn_newuid;
+			dn->dn_oldgid = dn->dn_newgid;
+			dn->dn_id_flags |= DN_ID_OLD_EXIST;
+			if (dn->dn_bonuslen == 0)
+				dn->dn_id_flags |= DN_ID_CHKED_SPILL;
+			else
+				dn->dn_id_flags |= DN_ID_CHKED_BONUS;
+		}
+		dn->dn_id_flags &= ~(DN_ID_NEW_EXIST);
+		mutex_exit(&dn->dn_mtx);
+
+		list_remove(list, dn);
+		dnode_rele(dn, list);
+	}
+}
+
+/*
+ * Returns a pointer to data to find uid/gid from
+ *
+ * If a dirty record for transaction group that is syncing can't
+ * be found then NULL is returned.  In the NULL case it is assumed
+ * the uid/gid aren't changing.
+ */
+static void *
+dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx)
+{
+	dbuf_dirty_record_t *dr, **drp;
+	void *data;
+
+	if (db->db_dirtycnt == 0)
+		return (db->db.db_data);  /* Nothing is changing */
+
+	for (drp = &db->db_last_dirty; (dr = *drp) != NULL; drp = &dr->dr_next)
+		if (dr->dr_txg == tx->tx_txg)
+			break;
+
+	if (dr == NULL) {
+		data = NULL;
+	} else {
+		dnode_t *dn;
+
+		DB_DNODE_ENTER(dr->dr_dbuf);
+		dn = DB_DNODE(dr->dr_dbuf);
+
+		if (dn->dn_bonuslen == 0 &&
+		    dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID)
+			data = dr->dt.dl.dr_data->b_data;
+		else
+			data = dr->dt.dl.dr_data;
+
+		DB_DNODE_EXIT(dr->dr_dbuf);
+	}
+
+	return (data);
+}
+
+void
+dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx)
+{
+	objset_t *os = dn->dn_objset;
+	void *data = NULL;
+	dmu_buf_impl_t *db = NULL;
+	uint64_t *user, *group;
+	int flags = dn->dn_id_flags;
+	int error;
+	boolean_t have_spill = B_FALSE;
+
+	if (!dmu_objset_userused_enabled(dn->dn_objset))
+		return;
+
+	if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST|
+	    DN_ID_CHKED_SPILL)))
+		return;
+
+	if (before && dn->dn_bonuslen != 0)
+		data = DN_BONUS(dn->dn_phys);
+	else if (!before && dn->dn_bonuslen != 0) {
+		if (dn->dn_bonus) {
+			db = dn->dn_bonus;
+			mutex_enter(&db->db_mtx);
+			data = dmu_objset_userquota_find_data(db, tx);
+		} else {
+			data = DN_BONUS(dn->dn_phys);
+		}
+	} else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) {
+			int rf = 0;
+
+			if (RW_WRITE_HELD(&dn->dn_struct_rwlock))
+				rf |= DB_RF_HAVESTRUCT;
+			error = dmu_spill_hold_by_dnode(dn,
+			    rf | DB_RF_MUST_SUCCEED,
+			    FTAG, (dmu_buf_t **)&db);
+			ASSERT(error == 0);
+			mutex_enter(&db->db_mtx);
+			data = (before) ? db->db.db_data :
+			    dmu_objset_userquota_find_data(db, tx);
+			have_spill = B_TRUE;
+	} else {
+		mutex_enter(&dn->dn_mtx);
+		dn->dn_id_flags |= DN_ID_CHKED_BONUS;
+		mutex_exit(&dn->dn_mtx);
+		return;
+	}
+
+	if (before) {
+		ASSERT(data);
+		user = &dn->dn_olduid;
+		group = &dn->dn_oldgid;
+	} else if (data) {
+		user = &dn->dn_newuid;
+		group = &dn->dn_newgid;
+	}
+
+	/*
+	 * Must always call the callback in case the object
+	 * type has changed and that type isn't an object type to track
+	 */
+	error = used_cbs[os->os_phys->os_type](dn->dn_bonustype, data,
+	    user, group);
+
+	/*
+	 * Preserve existing uid/gid when the callback can't determine
+	 * what the new uid/gid are and the callback returned EEXIST.
+	 * The EEXIST error tells us to just use the existing uid/gid.
+	 * If we don't know what the old values are then just assign
+	 * them to 0, since that is a new file  being created.
+	 */
+	if (!before && data == NULL && error == EEXIST) {
+		if (flags & DN_ID_OLD_EXIST) {
+			dn->dn_newuid = dn->dn_olduid;
+			dn->dn_newgid = dn->dn_oldgid;
+		} else {
+			dn->dn_newuid = 0;
+			dn->dn_newgid = 0;
+		}
+		error = 0;
+	}
+
+	if (db)
+		mutex_exit(&db->db_mtx);
+
+	mutex_enter(&dn->dn_mtx);
+	if (error == 0 && before)
+		dn->dn_id_flags |= DN_ID_OLD_EXIST;
+	if (error == 0 && !before)
+		dn->dn_id_flags |= DN_ID_NEW_EXIST;
+
+	if (have_spill) {
+		dn->dn_id_flags |= DN_ID_CHKED_SPILL;
+	} else {
+		dn->dn_id_flags |= DN_ID_CHKED_BONUS;
+	}
+	mutex_exit(&dn->dn_mtx);
+	if (have_spill)
+		dmu_buf_rele((dmu_buf_t *)db, FTAG);
+}
+
+boolean_t
+dmu_objset_userspace_present(objset_t *os)
+{
+	return (os->os_phys->os_flags &
+	    OBJSET_FLAG_USERACCOUNTING_COMPLETE);
+}
+
+int
+dmu_objset_userspace_upgrade(objset_t *os)
+{
+	uint64_t obj;
+	int err = 0;
+
+	if (dmu_objset_userspace_present(os))
+		return (0);
+	if (!dmu_objset_userused_enabled(os))
+		return (ENOTSUP);
+	if (dmu_objset_is_snapshot(os))
+		return (EINVAL);
+
+	/*
+	 * We simply need to mark every object dirty, so that it will be
+	 * synced out and now accounted.  If this is called
+	 * concurrently, or if we already did some work before crashing,
+	 * that's fine, since we track each object's accounted state
+	 * independently.
+	 */
+
+	for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) {
+		dmu_tx_t *tx;
+		dmu_buf_t *db;
+		int objerr;
+
+		if (issig(JUSTLOOKING) && issig(FORREAL))
+			return (EINTR);
+
+		objerr = dmu_bonus_hold(os, obj, FTAG, &db);
+		if (objerr)
+			continue;
+		tx = dmu_tx_create(os);
+		dmu_tx_hold_bonus(tx, obj);
+		objerr = dmu_tx_assign(tx, TXG_WAIT);
+		if (objerr) {
+			dmu_tx_abort(tx);
+			continue;
+		}
+		dmu_buf_will_dirty(db, tx);
+		dmu_buf_rele(db, FTAG);
+		dmu_tx_commit(tx);
+	}
+
+	os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
+	txg_wait_synced(dmu_objset_pool(os), 0);
+	return (0);
+}
+
+void
+dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
+    uint64_t *usedobjsp, uint64_t *availobjsp)
+{
+	dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp,
+	    usedobjsp, availobjsp);
+}
+
+uint64_t
+dmu_objset_fsid_guid(objset_t *os)
+{
+	return (dsl_dataset_fsid_guid(os->os_dsl_dataset));
+}
+
+void
+dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat)
+{
+	stat->dds_type = os->os_phys->os_type;
+	if (os->os_dsl_dataset)
+		dsl_dataset_fast_stat(os->os_dsl_dataset, stat);
+}
+
+void
+dmu_objset_stats(objset_t *os, nvlist_t *nv)
+{
+	ASSERT(os->os_dsl_dataset ||
+	    os->os_phys->os_type == DMU_OST_META);
+
+	if (os->os_dsl_dataset != NULL)
+		dsl_dataset_stats(os->os_dsl_dataset, nv);
+
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE,
+	    os->os_phys->os_type);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING,
+	    dmu_objset_userspace_present(os));
+}
+
+int
+dmu_objset_is_snapshot(objset_t *os)
+{
+	if (os->os_dsl_dataset != NULL)
+		return (dsl_dataset_is_snapshot(os->os_dsl_dataset));
+	else
+		return (B_FALSE);
+}
+
+int
+dmu_snapshot_realname(objset_t *os, char *name, char *real, int maxlen,
+    boolean_t *conflict)
+{
+	dsl_dataset_t *ds = os->os_dsl_dataset;
+	uint64_t ignored;
+
+	if (ds->ds_phys->ds_snapnames_zapobj == 0)
+		return (ENOENT);
+
+	return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset,
+	    ds->ds_phys->ds_snapnames_zapobj, name, 8, 1, &ignored, MT_FIRST,
+	    real, maxlen, conflict));
+}
+
+int
+dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
+    uint64_t *idp, uint64_t *offp, boolean_t *case_conflict)
+{
+	dsl_dataset_t *ds = os->os_dsl_dataset;
+	zap_cursor_t cursor;
+	zap_attribute_t attr;
+
+	if (ds->ds_phys->ds_snapnames_zapobj == 0)
+		return (ENOENT);
+
+	zap_cursor_init_serialized(&cursor,
+	    ds->ds_dir->dd_pool->dp_meta_objset,
+	    ds->ds_phys->ds_snapnames_zapobj, *offp);
+
+	if (zap_cursor_retrieve(&cursor, &attr) != 0) {
+		zap_cursor_fini(&cursor);
+		return (ENOENT);
+	}
+
+	if (strlen(attr.za_name) + 1 > namelen) {
+		zap_cursor_fini(&cursor);
+		return (ENAMETOOLONG);
+	}
+
+	(void) strcpy(name, attr.za_name);
+	if (idp)
+		*idp = attr.za_first_integer;
+	if (case_conflict)
+		*case_conflict = attr.za_normalization_conflict;
+	zap_cursor_advance(&cursor);
+	*offp = zap_cursor_serialize(&cursor);
+	zap_cursor_fini(&cursor);
+
+	return (0);
+}
+
+int
+dmu_dir_list_next(objset_t *os, int namelen, char *name,
+    uint64_t *idp, uint64_t *offp)
+{
+	dsl_dir_t *dd = os->os_dsl_dataset->ds_dir;
+	zap_cursor_t cursor;
+	zap_attribute_t attr;
+
+	/* there is no next dir on a snapshot! */
+	if (os->os_dsl_dataset->ds_object !=
+	    dd->dd_phys->dd_head_dataset_obj)
+		return (ENOENT);
+
+	zap_cursor_init_serialized(&cursor,
+	    dd->dd_pool->dp_meta_objset,
+	    dd->dd_phys->dd_child_dir_zapobj, *offp);
+
+	if (zap_cursor_retrieve(&cursor, &attr) != 0) {
+		zap_cursor_fini(&cursor);
+		return (ENOENT);
+	}
+
+	if (strlen(attr.za_name) + 1 > namelen) {
+		zap_cursor_fini(&cursor);
+		return (ENAMETOOLONG);
+	}
+
+	(void) strcpy(name, attr.za_name);
+	if (idp)
+		*idp = attr.za_first_integer;
+	zap_cursor_advance(&cursor);
+	*offp = zap_cursor_serialize(&cursor);
+	zap_cursor_fini(&cursor);
+
+	return (0);
+}
+
+struct findarg {
+	int (*func)(const char *, void *);
+	void *arg;
+};
+
+/* ARGSUSED */
+static int
+findfunc(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)
+{
+	struct findarg *fa = arg;
+	return (fa->func(dsname, fa->arg));
+}
+
+/*
+ * Find all objsets under name, and for each, call 'func(child_name, arg)'.
+ * Perhaps change all callers to use dmu_objset_find_spa()?
+ */
+int
+dmu_objset_find(char *name, int func(const char *, void *), void *arg,
+    int flags)
+{
+	struct findarg fa;
+	fa.func = func;
+	fa.arg = arg;
+	return (dmu_objset_find_spa(NULL, name, findfunc, &fa, flags));
+}
+
+/*
+ * Find all objsets under name, call func on each
+ */
+int
+dmu_objset_find_spa(spa_t *spa, const char *name,
+    int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags)
+{
+	dsl_dir_t *dd;
+	dsl_pool_t *dp;
+	dsl_dataset_t *ds;
+	zap_cursor_t zc;
+	zap_attribute_t *attr;
+	char *child;
+	uint64_t thisobj;
+	int err;
+
+	if (name == NULL)
+		name = spa_name(spa);
+	err = dsl_dir_open_spa(spa, name, FTAG, &dd, NULL);
+	if (err)
+		return (err);
+
+	/* Don't visit hidden ($MOS & $ORIGIN) objsets. */
+	if (dd->dd_myname[0] == '$') {
+		dsl_dir_close(dd, FTAG);
+		return (0);
+	}
+
+	thisobj = dd->dd_phys->dd_head_dataset_obj;
+	attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
+	dp = dd->dd_pool;
+
+	/*
+	 * Iterate over all children.
+	 */
+	if (flags & DS_FIND_CHILDREN) {
+		for (zap_cursor_init(&zc, dp->dp_meta_objset,
+		    dd->dd_phys->dd_child_dir_zapobj);
+		    zap_cursor_retrieve(&zc, attr) == 0;
+		    (void) zap_cursor_advance(&zc)) {
+			ASSERT(attr->za_integer_length == sizeof (uint64_t));
+			ASSERT(attr->za_num_integers == 1);
+
+			child = kmem_asprintf("%s/%s", name, attr->za_name);
+			err = dmu_objset_find_spa(spa, child, func, arg, flags);
+			strfree(child);
+			if (err)
+				break;
+		}
+		zap_cursor_fini(&zc);
+
+		if (err) {
+			dsl_dir_close(dd, FTAG);
+			kmem_free(attr, sizeof (zap_attribute_t));
+			return (err);
+		}
+	}
+
+	/*
+	 * Iterate over all snapshots.
+	 */
+	if (flags & DS_FIND_SNAPSHOTS) {
+		if (!dsl_pool_sync_context(dp))
+			rw_enter(&dp->dp_config_rwlock, RW_READER);
+		err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
+		if (!dsl_pool_sync_context(dp))
+			rw_exit(&dp->dp_config_rwlock);
+
+		if (err == 0) {
+			uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj;
+			dsl_dataset_rele(ds, FTAG);
+
+			for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
+			    zap_cursor_retrieve(&zc, attr) == 0;
+			    (void) zap_cursor_advance(&zc)) {
+				ASSERT(attr->za_integer_length ==
+				    sizeof (uint64_t));
+				ASSERT(attr->za_num_integers == 1);
+
+				child = kmem_asprintf("%s@%s",
+				    name, attr->za_name);
+				err = func(spa, attr->za_first_integer,
+				    child, arg);
+				strfree(child);
+				if (err)
+					break;
+			}
+			zap_cursor_fini(&zc);
+		}
+	}
+
+	dsl_dir_close(dd, FTAG);
+	kmem_free(attr, sizeof (zap_attribute_t));
+
+	if (err)
+		return (err);
+
+	/*
+	 * Apply to self if appropriate.
+	 */
+	err = func(spa, thisobj, name, arg);
+	return (err);
+}
+
+/* ARGSUSED */
+int
+dmu_objset_prefetch(const char *name, void *arg)
+{
+	dsl_dataset_t *ds;
+
+	if (dsl_dataset_hold(name, FTAG, &ds))
+		return (0);
+
+	if (!BP_IS_HOLE(&ds->ds_phys->ds_bp)) {
+		mutex_enter(&ds->ds_opening_lock);
+		if (ds->ds_objset == NULL) {
+			uint32_t aflags = ARC_NOWAIT | ARC_PREFETCH;
+			zbookmark_t zb;
+
+			SET_BOOKMARK(&zb, ds->ds_object, ZB_ROOT_OBJECT,
+			    ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
+
+			(void) dsl_read_nolock(NULL, dsl_dataset_get_spa(ds),
+			    &ds->ds_phys->ds_bp, NULL, NULL,
+			    ZIO_PRIORITY_ASYNC_READ,
+			    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
+			    &aflags, &zb);
+		}
+		mutex_exit(&ds->ds_opening_lock);
+	}
+
+	dsl_dataset_rele(ds, FTAG);
+	return (0);
+}
+
+void
+dmu_objset_set_user(objset_t *os, void *user_ptr)
+{
+	ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
+	os->os_user_ptr = user_ptr;
+}
+
+void *
+dmu_objset_get_user(objset_t *os)
+{
+	ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
+	return (os->os_user_ptr);
+}
diff --git a/uts/common/fs/zfs/dmu_send.c b/uts/common/fs/zfs/dmu_send.c
new file mode 100644
index 000000000000..e47d533a44f4
--- /dev/null
+++ b/uts/common/fs/zfs/dmu_send.c
@@ -0,0 +1,1606 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/dmu.h>
+#include <sys/dmu_impl.h>
+#include <sys/dmu_tx.h>
+#include <sys/dbuf.h>
+#include <sys/dnode.h>
+#include <sys/zfs_context.h>
+#include <sys/dmu_objset.h>
+#include <sys/dmu_traverse.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_pool.h>
+#include <sys/dsl_synctask.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/zap.h>
+#include <sys/zio_checksum.h>
+#include <sys/zfs_znode.h>
+#include <zfs_fletcher.h>
+#include <sys/avl.h>
+#include <sys/ddt.h>
+#include <sys/zfs_onexit.h>
+
+static char *dmu_recv_tag = "dmu_recv_tag";
+
+/*
+ * The list of data whose inclusion in a send stream can be pending from
+ * one call to backup_cb to another.  Multiple calls to dump_free() and
+ * dump_freeobjects() can be aggregated into a single DRR_FREE or
+ * DRR_FREEOBJECTS replay record.
+ */
+typedef enum {
+	PENDING_NONE,
+	PENDING_FREE,
+	PENDING_FREEOBJECTS
+} pendop_t;
+
+struct backuparg {
+	dmu_replay_record_t *drr;
+	vnode_t *vp;
+	offset_t *off;
+	objset_t *os;
+	zio_cksum_t zc;
+	uint64_t toguid;
+	int err;
+	pendop_t pending_op;
+};
+
+static int
+dump_bytes(struct backuparg *ba, void *buf, int len)
+{
+	ssize_t resid; /* have to get resid to get detailed errno */
+	ASSERT3U(len % 8, ==, 0);
+
+	fletcher_4_incremental_native(buf, len, &ba->zc);
+	ba->err = vn_rdwr(UIO_WRITE, ba->vp,
+	    (caddr_t)buf, len,
+	    0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid);
+	*ba->off += len;
+	return (ba->err);
+}
+
+static int
+dump_free(struct backuparg *ba, uint64_t object, uint64_t offset,
+    uint64_t length)
+{
+	struct drr_free *drrf = &(ba->drr->drr_u.drr_free);
+
+	/*
+	 * If there is a pending op, but it's not PENDING_FREE, push it out,
+	 * since free block aggregation can only be done for blocks of the
+	 * same type (i.e., DRR_FREE records can only be aggregated with
+	 * other DRR_FREE records.  DRR_FREEOBJECTS records can only be
+	 * aggregated with other DRR_FREEOBJECTS records.
+	 */
+	if (ba->pending_op != PENDING_NONE && ba->pending_op != PENDING_FREE) {
+		if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
+			return (EINTR);
+		ba->pending_op = PENDING_NONE;
+	}
+
+	if (ba->pending_op == PENDING_FREE) {
+		/*
+		 * There should never be a PENDING_FREE if length is -1
+		 * (because dump_dnode is the only place where this
+		 * function is called with a -1, and only after flushing
+		 * any pending record).
+		 */
+		ASSERT(length != -1ULL);
+		/*
+		 * Check to see whether this free block can be aggregated
+		 * with pending one.
+		 */
+		if (drrf->drr_object == object && drrf->drr_offset +
+		    drrf->drr_length == offset) {
+			drrf->drr_length += length;
+			return (0);
+		} else {
+			/* not a continuation.  Push out pending record */
+			if (dump_bytes(ba, ba->drr,
+			    sizeof (dmu_replay_record_t)) != 0)
+				return (EINTR);
+			ba->pending_op = PENDING_NONE;
+		}
+	}
+	/* create a FREE record and make it pending */
+	bzero(ba->drr, sizeof (dmu_replay_record_t));
+	ba->drr->drr_type = DRR_FREE;
+	drrf->drr_object = object;
+	drrf->drr_offset = offset;
+	drrf->drr_length = length;
+	drrf->drr_toguid = ba->toguid;
+	if (length == -1ULL) {
+		if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
+			return (EINTR);
+	} else {
+		ba->pending_op = PENDING_FREE;
+	}
+
+	return (0);
+}
+
+static int
+dump_data(struct backuparg *ba, dmu_object_type_t type,
+    uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data)
+{
+	struct drr_write *drrw = &(ba->drr->drr_u.drr_write);
+
+
+	/*
+	 * If there is any kind of pending aggregation (currently either
+	 * a grouping of free objects or free blocks), push it out to
+	 * the stream, since aggregation can't be done across operations
+	 * of different types.
+	 */
+	if (ba->pending_op != PENDING_NONE) {
+		if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
+			return (EINTR);
+		ba->pending_op = PENDING_NONE;
+	}
+	/* write a DATA record */
+	bzero(ba->drr, sizeof (dmu_replay_record_t));
+	ba->drr->drr_type = DRR_WRITE;
+	drrw->drr_object = object;
+	drrw->drr_type = type;
+	drrw->drr_offset = offset;
+	drrw->drr_length = blksz;
+	drrw->drr_toguid = ba->toguid;
+	drrw->drr_checksumtype = BP_GET_CHECKSUM(bp);
+	if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup)
+		drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP;
+	DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp));
+	DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp));
+	DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp));
+	drrw->drr_key.ddk_cksum = bp->blk_cksum;
+
+	if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
+		return (EINTR);
+	if (dump_bytes(ba, data, blksz) != 0)
+		return (EINTR);
+	return (0);
+}
+
+static int
+dump_spill(struct backuparg *ba, uint64_t object, int blksz, void *data)
+{
+	struct drr_spill *drrs = &(ba->drr->drr_u.drr_spill);
+
+	if (ba->pending_op != PENDING_NONE) {
+		if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
+			return (EINTR);
+		ba->pending_op = PENDING_NONE;
+	}
+
+	/* write a SPILL record */
+	bzero(ba->drr, sizeof (dmu_replay_record_t));
+	ba->drr->drr_type = DRR_SPILL;
+	drrs->drr_object = object;
+	drrs->drr_length = blksz;
+	drrs->drr_toguid = ba->toguid;
+
+	if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)))
+		return (EINTR);
+	if (dump_bytes(ba, data, blksz))
+		return (EINTR);
+	return (0);
+}
+
+static int
+dump_freeobjects(struct backuparg *ba, uint64_t firstobj, uint64_t numobjs)
+{
+	struct drr_freeobjects *drrfo = &(ba->drr->drr_u.drr_freeobjects);
+
+	/*
+	 * If there is a pending op, but it's not PENDING_FREEOBJECTS,
+	 * push it out, since free block aggregation can only be done for
+	 * blocks of the same type (i.e., DRR_FREE records can only be
+	 * aggregated with other DRR_FREE records.  DRR_FREEOBJECTS records
+	 * can only be aggregated with other DRR_FREEOBJECTS records.
+	 */
+	if (ba->pending_op != PENDING_NONE &&
+	    ba->pending_op != PENDING_FREEOBJECTS) {
+		if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
+			return (EINTR);
+		ba->pending_op = PENDING_NONE;
+	}
+	if (ba->pending_op == PENDING_FREEOBJECTS) {
+		/*
+		 * See whether this free object array can be aggregated
+		 * with pending one
+		 */
+		if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) {
+			drrfo->drr_numobjs += numobjs;
+			return (0);
+		} else {
+			/* can't be aggregated.  Push out pending record */
+			if (dump_bytes(ba, ba->drr,
+			    sizeof (dmu_replay_record_t)) != 0)
+				return (EINTR);
+			ba->pending_op = PENDING_NONE;
+		}
+	}
+
+	/* write a FREEOBJECTS record */
+	bzero(ba->drr, sizeof (dmu_replay_record_t));
+	ba->drr->drr_type = DRR_FREEOBJECTS;
+	drrfo->drr_firstobj = firstobj;
+	drrfo->drr_numobjs = numobjs;
+	drrfo->drr_toguid = ba->toguid;
+
+	ba->pending_op = PENDING_FREEOBJECTS;
+
+	return (0);
+}
+
+static int
+dump_dnode(struct backuparg *ba, uint64_t object, dnode_phys_t *dnp)
+{
+	struct drr_object *drro = &(ba->drr->drr_u.drr_object);
+
+	if (dnp == NULL || dnp->dn_type == DMU_OT_NONE)
+		return (dump_freeobjects(ba, object, 1));
+
+	if (ba->pending_op != PENDING_NONE) {
+		if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
+			return (EINTR);
+		ba->pending_op = PENDING_NONE;
+	}
+
+	/* write an OBJECT record */
+	bzero(ba->drr, sizeof (dmu_replay_record_t));
+	ba->drr->drr_type = DRR_OBJECT;
+	drro->drr_object = object;
+	drro->drr_type = dnp->dn_type;
+	drro->drr_bonustype = dnp->dn_bonustype;
+	drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT;
+	drro->drr_bonuslen = dnp->dn_bonuslen;
+	drro->drr_checksumtype = dnp->dn_checksum;
+	drro->drr_compress = dnp->dn_compress;
+	drro->drr_toguid = ba->toguid;
+
+	if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
+		return (EINTR);
+
+	if (dump_bytes(ba, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0)
+		return (EINTR);
+
+	/* free anything past the end of the file */
+	if (dump_free(ba, object, (dnp->dn_maxblkid + 1) *
+	    (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL))
+		return (EINTR);
+	if (ba->err)
+		return (EINTR);
+	return (0);
+}
+
+#define	BP_SPAN(dnp, level) \
+	(((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \
+	(level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT)))
+
+/* ARGSUSED */
+static int
+backup_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, arc_buf_t *pbuf,
+    const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
+{
+	struct backuparg *ba = arg;
+	dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE;
+	int err = 0;
+
+	if (issig(JUSTLOOKING) && issig(FORREAL))
+		return (EINTR);
+
+	if (zb->zb_object != DMU_META_DNODE_OBJECT &&
+	    DMU_OBJECT_IS_SPECIAL(zb->zb_object)) {
+		return (0);
+	} else if (bp == NULL && zb->zb_object == DMU_META_DNODE_OBJECT) {
+		uint64_t span = BP_SPAN(dnp, zb->zb_level);
+		uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT;
+		err = dump_freeobjects(ba, dnobj, span >> DNODE_SHIFT);
+	} else if (bp == NULL) {
+		uint64_t span = BP_SPAN(dnp, zb->zb_level);
+		err = dump_free(ba, zb->zb_object, zb->zb_blkid * span, span);
+	} else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) {
+		return (0);
+	} else if (type == DMU_OT_DNODE) {
+		dnode_phys_t *blk;
+		int i;
+		int blksz = BP_GET_LSIZE(bp);
+		uint32_t aflags = ARC_WAIT;
+		arc_buf_t *abuf;
+
+		if (dsl_read(NULL, spa, bp, pbuf,
+		    arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
+		    ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
+			return (EIO);
+
+		blk = abuf->b_data;
+		for (i = 0; i < blksz >> DNODE_SHIFT; i++) {
+			uint64_t dnobj = (zb->zb_blkid <<
+			    (DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i;
+			err = dump_dnode(ba, dnobj, blk+i);
+			if (err)
+				break;
+		}
+		(void) arc_buf_remove_ref(abuf, &abuf);
+	} else if (type == DMU_OT_SA) {
+		uint32_t aflags = ARC_WAIT;
+		arc_buf_t *abuf;
+		int blksz = BP_GET_LSIZE(bp);
+
+		if (arc_read_nolock(NULL, spa, bp,
+		    arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
+		    ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
+			return (EIO);
+
+		err = dump_spill(ba, zb->zb_object, blksz, abuf->b_data);
+		(void) arc_buf_remove_ref(abuf, &abuf);
+	} else { /* it's a level-0 block of a regular object */
+		uint32_t aflags = ARC_WAIT;
+		arc_buf_t *abuf;
+		int blksz = BP_GET_LSIZE(bp);
+
+		if (dsl_read(NULL, spa, bp, pbuf,
+		    arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
+		    ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
+			return (EIO);
+
+		err = dump_data(ba, type, zb->zb_object, zb->zb_blkid * blksz,
+		    blksz, bp, abuf->b_data);
+		(void) arc_buf_remove_ref(abuf, &abuf);
+	}
+
+	ASSERT(err == 0 || err == EINTR);
+	return (err);
+}
+
+int
+dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
+    vnode_t *vp, offset_t *off)
+{
+	dsl_dataset_t *ds = tosnap->os_dsl_dataset;
+	dsl_dataset_t *fromds = fromsnap ? fromsnap->os_dsl_dataset : NULL;
+	dmu_replay_record_t *drr;
+	struct backuparg ba;
+	int err;
+	uint64_t fromtxg = 0;
+
+	/* tosnap must be a snapshot */
+	if (ds->ds_phys->ds_next_snap_obj == 0)
+		return (EINVAL);
+
+	/* fromsnap must be an earlier snapshot from the same fs as tosnap */
+	if (fromds && (ds->ds_dir != fromds->ds_dir ||
+	    fromds->ds_phys->ds_creation_txg >= ds->ds_phys->ds_creation_txg))
+		return (EXDEV);
+
+	if (fromorigin) {
+		dsl_pool_t *dp = ds->ds_dir->dd_pool;
+
+		if (fromsnap)
+			return (EINVAL);
+
+		if (dsl_dir_is_clone(ds->ds_dir)) {
+			rw_enter(&dp->dp_config_rwlock, RW_READER);
+			err = dsl_dataset_hold_obj(dp,
+			    ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &fromds);
+			rw_exit(&dp->dp_config_rwlock);
+			if (err)
+				return (err);
+		} else {
+			fromorigin = B_FALSE;
+		}
+	}
+
+
+	drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
+	drr->drr_type = DRR_BEGIN;
+	drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC;
+	DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo,
+	    DMU_SUBSTREAM);
+
+#ifdef _KERNEL
+	if (dmu_objset_type(tosnap) == DMU_OST_ZFS) {
+		uint64_t version;
+		if (zfs_get_zplprop(tosnap, ZFS_PROP_VERSION, &version) != 0)
+			return (EINVAL);
+		if (version == ZPL_VERSION_SA) {
+			DMU_SET_FEATUREFLAGS(
+			    drr->drr_u.drr_begin.drr_versioninfo,
+			    DMU_BACKUP_FEATURE_SA_SPILL);
+		}
+	}
+#endif
+
+	drr->drr_u.drr_begin.drr_creation_time =
+	    ds->ds_phys->ds_creation_time;
+	drr->drr_u.drr_begin.drr_type = tosnap->os_phys->os_type;
+	if (fromorigin)
+		drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE;
+	drr->drr_u.drr_begin.drr_toguid = ds->ds_phys->ds_guid;
+	if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET)
+		drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA;
+
+	if (fromds)
+		drr->drr_u.drr_begin.drr_fromguid = fromds->ds_phys->ds_guid;
+	dsl_dataset_name(ds, drr->drr_u.drr_begin.drr_toname);
+
+	if (fromds)
+		fromtxg = fromds->ds_phys->ds_creation_txg;
+	if (fromorigin)
+		dsl_dataset_rele(fromds, FTAG);
+
+	ba.drr = drr;
+	ba.vp = vp;
+	ba.os = tosnap;
+	ba.off = off;
+	ba.toguid = ds->ds_phys->ds_guid;
+	ZIO_SET_CHECKSUM(&ba.zc, 0, 0, 0, 0);
+	ba.pending_op = PENDING_NONE;
+
+	if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0) {
+		kmem_free(drr, sizeof (dmu_replay_record_t));
+		return (ba.err);
+	}
+
+	err = traverse_dataset(ds, fromtxg, TRAVERSE_PRE | TRAVERSE_PREFETCH,
+	    backup_cb, &ba);
+
+	if (ba.pending_op != PENDING_NONE)
+		if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0)
+			err = EINTR;
+
+	if (err) {
+		if (err == EINTR && ba.err)
+			err = ba.err;
+		kmem_free(drr, sizeof (dmu_replay_record_t));
+		return (err);
+	}
+
+	bzero(drr, sizeof (dmu_replay_record_t));
+	drr->drr_type = DRR_END;
+	drr->drr_u.drr_end.drr_checksum = ba.zc;
+	drr->drr_u.drr_end.drr_toguid = ba.toguid;
+
+	if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0) {
+		kmem_free(drr, sizeof (dmu_replay_record_t));
+		return (ba.err);
+	}
+
+	kmem_free(drr, sizeof (dmu_replay_record_t));
+
+	return (0);
+}
+
+struct recvbeginsyncarg {
+	const char *tofs;
+	const char *tosnap;
+	dsl_dataset_t *origin;
+	uint64_t fromguid;
+	dmu_objset_type_t type;
+	void *tag;
+	boolean_t force;
+	uint64_t dsflags;
+	char clonelastname[MAXNAMELEN];
+	dsl_dataset_t *ds; /* the ds to recv into; returned from the syncfunc */
+	cred_t *cr;
+};
+
+/* ARGSUSED */
+static int
+recv_new_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dir_t *dd = arg1;
+	struct recvbeginsyncarg *rbsa = arg2;
+	objset_t *mos = dd->dd_pool->dp_meta_objset;
+	uint64_t val;
+	int err;
+
+	err = zap_lookup(mos, dd->dd_phys->dd_child_dir_zapobj,
+	    strrchr(rbsa->tofs, '/') + 1, sizeof (uint64_t), 1, &val);
+
+	if (err != ENOENT)
+		return (err ? err : EEXIST);
+
+	if (rbsa->origin) {
+		/* make sure it's a snap in the same pool */
+		if (rbsa->origin->ds_dir->dd_pool != dd->dd_pool)
+			return (EXDEV);
+		if (!dsl_dataset_is_snapshot(rbsa->origin))
+			return (EINVAL);
+		if (rbsa->origin->ds_phys->ds_guid != rbsa->fromguid)
+			return (ENODEV);
+	}
+
+	return (0);
+}
+
+static void
+recv_new_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dir_t *dd = arg1;
+	struct recvbeginsyncarg *rbsa = arg2;
+	uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags;
+	uint64_t dsobj;
+
+	/* Create and open new dataset. */
+	dsobj = dsl_dataset_create_sync(dd, strrchr(rbsa->tofs, '/') + 1,
+	    rbsa->origin, flags, rbsa->cr, tx);
+	VERIFY(0 == dsl_dataset_own_obj(dd->dd_pool, dsobj,
+	    B_TRUE, dmu_recv_tag, &rbsa->ds));
+
+	if (rbsa->origin == NULL) {
+		(void) dmu_objset_create_impl(dd->dd_pool->dp_spa,
+		    rbsa->ds, &rbsa->ds->ds_phys->ds_bp, rbsa->type, tx);
+	}
+
+	spa_history_log_internal(LOG_DS_REPLAY_FULL_SYNC,
+	    dd->dd_pool->dp_spa, tx, "dataset = %lld", dsobj);
+}
+
+/* ARGSUSED */
+static int
+recv_existing_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	struct recvbeginsyncarg *rbsa = arg2;
+	int err;
+	uint64_t val;
+
+	/* must not have any changes since most recent snapshot */
+	if (!rbsa->force && dsl_dataset_modified_since_lastsnap(ds))
+		return (ETXTBSY);
+
+	/* new snapshot name must not exist */
+	err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset,
+	    ds->ds_phys->ds_snapnames_zapobj, rbsa->tosnap, 8, 1, &val);
+	if (err == 0)
+		return (EEXIST);
+	if (err != ENOENT)
+		return (err);
+
+	if (rbsa->fromguid) {
+		/* if incremental, most recent snapshot must match fromguid */
+		if (ds->ds_prev == NULL)
+			return (ENODEV);
+
+		/*
+		 * most recent snapshot must match fromguid, or there are no
+		 * changes since the fromguid one
+		 */
+		if (ds->ds_prev->ds_phys->ds_guid != rbsa->fromguid) {
+			uint64_t birth = ds->ds_prev->ds_phys->ds_bp.blk_birth;
+			uint64_t obj = ds->ds_prev->ds_phys->ds_prev_snap_obj;
+			while (obj != 0) {
+				dsl_dataset_t *snap;
+				err = dsl_dataset_hold_obj(ds->ds_dir->dd_pool,
+				    obj, FTAG, &snap);
+				if (err)
+					return (ENODEV);
+				if (snap->ds_phys->ds_creation_txg < birth) {
+					dsl_dataset_rele(snap, FTAG);
+					return (ENODEV);
+				}
+				if (snap->ds_phys->ds_guid == rbsa->fromguid) {
+					dsl_dataset_rele(snap, FTAG);
+					break; /* it's ok */
+				}
+				obj = snap->ds_phys->ds_prev_snap_obj;
+				dsl_dataset_rele(snap, FTAG);
+			}
+			if (obj == 0)
+				return (ENODEV);
+		}
+	} else {
+		/* if full, most recent snapshot must be $ORIGIN */
+		if (ds->ds_phys->ds_prev_snap_txg >= TXG_INITIAL)
+			return (ENODEV);
+	}
+
+	/* temporary clone name must not exist */
+	err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset,
+	    ds->ds_dir->dd_phys->dd_child_dir_zapobj,
+	    rbsa->clonelastname, 8, 1, &val);
+	if (err == 0)
+		return (EEXIST);
+	if (err != ENOENT)
+		return (err);
+
+	return (0);
+}
+
+/* ARGSUSED */
+static void
+recv_existing_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ohds = arg1;
+	struct recvbeginsyncarg *rbsa = arg2;
+	dsl_pool_t *dp = ohds->ds_dir->dd_pool;
+	dsl_dataset_t *cds;
+	uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags;
+	uint64_t dsobj;
+
+	/* create and open the temporary clone */
+	dsobj = dsl_dataset_create_sync(ohds->ds_dir, rbsa->clonelastname,
+	    ohds->ds_prev, flags, rbsa->cr, tx);
+	VERIFY(0 == dsl_dataset_own_obj(dp, dsobj, B_TRUE, dmu_recv_tag, &cds));
+
+	/*
+	 * If we actually created a non-clone, we need to create the
+	 * objset in our new dataset.
+	 */
+	if (BP_IS_HOLE(dsl_dataset_get_blkptr(cds))) {
+		(void) dmu_objset_create_impl(dp->dp_spa,
+		    cds, dsl_dataset_get_blkptr(cds), rbsa->type, tx);
+	}
+
+	rbsa->ds = cds;
+
+	spa_history_log_internal(LOG_DS_REPLAY_INC_SYNC,
+	    dp->dp_spa, tx, "dataset = %lld", dsobj);
+}
+
+static boolean_t
+dmu_recv_verify_features(dsl_dataset_t *ds, struct drr_begin *drrb)
+{
+	int featureflags;
+
+	featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
+
+	/* Verify pool version supports SA if SA_SPILL feature set */
+	return ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) &&
+	    (spa_version(dsl_dataset_get_spa(ds)) < SPA_VERSION_SA));
+}
+
+/*
+ * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin()
+ * succeeds; otherwise we will leak the holds on the datasets.
+ */
+int
+dmu_recv_begin(char *tofs, char *tosnap, char *top_ds, struct drr_begin *drrb,
+    boolean_t force, objset_t *origin, dmu_recv_cookie_t *drc)
+{
+	int err = 0;
+	boolean_t byteswap;
+	struct recvbeginsyncarg rbsa = { 0 };
+	uint64_t versioninfo;
+	int flags;
+	dsl_dataset_t *ds;
+
+	if (drrb->drr_magic == DMU_BACKUP_MAGIC)
+		byteswap = FALSE;
+	else if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
+		byteswap = TRUE;
+	else
+		return (EINVAL);
+
+	rbsa.tofs = tofs;
+	rbsa.tosnap = tosnap;
+	rbsa.origin = origin ? origin->os_dsl_dataset : NULL;
+	rbsa.fromguid = drrb->drr_fromguid;
+	rbsa.type = drrb->drr_type;
+	rbsa.tag = FTAG;
+	rbsa.dsflags = 0;
+	rbsa.cr = CRED();
+	versioninfo = drrb->drr_versioninfo;
+	flags = drrb->drr_flags;
+
+	if (byteswap) {
+		rbsa.type = BSWAP_32(rbsa.type);
+		rbsa.fromguid = BSWAP_64(rbsa.fromguid);
+		versioninfo = BSWAP_64(versioninfo);
+		flags = BSWAP_32(flags);
+	}
+
+	if (DMU_GET_STREAM_HDRTYPE(versioninfo) == DMU_COMPOUNDSTREAM ||
+	    rbsa.type >= DMU_OST_NUMTYPES ||
+	    ((flags & DRR_FLAG_CLONE) && origin == NULL))
+		return (EINVAL);
+
+	if (flags & DRR_FLAG_CI_DATA)
+		rbsa.dsflags = DS_FLAG_CI_DATASET;
+
+	bzero(drc, sizeof (dmu_recv_cookie_t));
+	drc->drc_drrb = drrb;
+	drc->drc_tosnap = tosnap;
+	drc->drc_top_ds = top_ds;
+	drc->drc_force = force;
+
+	/*
+	 * Process the begin in syncing context.
+	 */
+
+	/* open the dataset we are logically receiving into */
+	err = dsl_dataset_hold(tofs, dmu_recv_tag, &ds);
+	if (err == 0) {
+		if (dmu_recv_verify_features(ds, drrb)) {
+			dsl_dataset_rele(ds, dmu_recv_tag);
+			return (ENOTSUP);
+		}
+		/* target fs already exists; recv into temp clone */
+
+		/* Can't recv a clone into an existing fs */
+		if (flags & DRR_FLAG_CLONE) {
+			dsl_dataset_rele(ds, dmu_recv_tag);
+			return (EINVAL);
+		}
+
+		/* must not have an incremental recv already in progress */
+		if (!mutex_tryenter(&ds->ds_recvlock)) {
+			dsl_dataset_rele(ds, dmu_recv_tag);
+			return (EBUSY);
+		}
+
+		/* tmp clone name is: tofs/%tosnap" */
+		(void) snprintf(rbsa.clonelastname, sizeof (rbsa.clonelastname),
+		    "%%%s", tosnap);
+		rbsa.force = force;
+		err = dsl_sync_task_do(ds->ds_dir->dd_pool,
+		    recv_existing_check, recv_existing_sync, ds, &rbsa, 5);
+		if (err) {
+			mutex_exit(&ds->ds_recvlock);
+			dsl_dataset_rele(ds, dmu_recv_tag);
+			return (err);
+		}
+		drc->drc_logical_ds = ds;
+		drc->drc_real_ds = rbsa.ds;
+	} else if (err == ENOENT) {
+		/* target fs does not exist; must be a full backup or clone */
+		char *cp;
+
+		/*
+		 * If it's a non-clone incremental, we are missing the
+		 * target fs, so fail the recv.
+		 */
+		if (rbsa.fromguid && !(flags & DRR_FLAG_CLONE))
+			return (ENOENT);
+
+		/* Open the parent of tofs */
+		cp = strrchr(tofs, '/');
+		*cp = '\0';
+		err = dsl_dataset_hold(tofs, FTAG, &ds);
+		*cp = '/';
+		if (err)
+			return (err);
+
+		if (dmu_recv_verify_features(ds, drrb)) {
+			dsl_dataset_rele(ds, FTAG);
+			return (ENOTSUP);
+		}
+
+		err = dsl_sync_task_do(ds->ds_dir->dd_pool,
+		    recv_new_check, recv_new_sync, ds->ds_dir, &rbsa, 5);
+		dsl_dataset_rele(ds, FTAG);
+		if (err)
+			return (err);
+		drc->drc_logical_ds = drc->drc_real_ds = rbsa.ds;
+		drc->drc_newfs = B_TRUE;
+	}
+
+	return (err);
+}
+
+struct restorearg {
+	int err;
+	int byteswap;
+	vnode_t *vp;
+	char *buf;
+	uint64_t voff;
+	int bufsize; /* amount of memory allocated for buf */
+	zio_cksum_t cksum;
+	avl_tree_t *guid_to_ds_map;
+};
+
+typedef struct guid_map_entry {
+	uint64_t	guid;
+	dsl_dataset_t	*gme_ds;
+	avl_node_t	avlnode;
+} guid_map_entry_t;
+
+static int
+guid_compare(const void *arg1, const void *arg2)
+{
+	const guid_map_entry_t *gmep1 = arg1;
+	const guid_map_entry_t *gmep2 = arg2;
+
+	if (gmep1->guid < gmep2->guid)
+		return (-1);
+	else if (gmep1->guid > gmep2->guid)
+		return (1);
+	return (0);
+}
+
+/*
+ * This function is a callback used by dmu_objset_find() (which
+ * enumerates the object sets) to build an avl tree that maps guids
+ * to datasets.  The resulting table is used when processing DRR_WRITE_BYREF
+ * send stream records.  These records, which are used in dedup'ed
+ * streams, do not contain data themselves, but refer to a copy
+ * of the data block that has already been written because it was
+ * earlier in the stream.  That previous copy is identified by the
+ * guid of the dataset with the referenced data.
+ */
+int
+find_ds_by_guid(const char *name, void *arg)
+{
+	avl_tree_t *guid_map = arg;
+	dsl_dataset_t *ds, *snapds;
+	guid_map_entry_t *gmep;
+	dsl_pool_t *dp;
+	int err;
+	uint64_t lastobj, firstobj;
+
+	if (dsl_dataset_hold(name, FTAG, &ds) != 0)
+		return (0);
+
+	dp = ds->ds_dir->dd_pool;
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+	firstobj = ds->ds_dir->dd_phys->dd_origin_obj;
+	lastobj = ds->ds_phys->ds_prev_snap_obj;
+
+	while (lastobj != firstobj) {
+		err = dsl_dataset_hold_obj(dp, lastobj, guid_map, &snapds);
+		if (err) {
+			/*
+			 * Skip this snapshot and move on. It's not
+			 * clear why this would ever happen, but the
+			 * remainder of the snapshot streadm can be
+			 * processed.
+			 */
+			rw_exit(&dp->dp_config_rwlock);
+			dsl_dataset_rele(ds, FTAG);
+			return (0);
+		}
+
+		gmep = kmem_alloc(sizeof (guid_map_entry_t), KM_SLEEP);
+		gmep->guid = snapds->ds_phys->ds_guid;
+		gmep->gme_ds = snapds;
+		avl_add(guid_map, gmep);
+		lastobj = snapds->ds_phys->ds_prev_snap_obj;
+	}
+
+	rw_exit(&dp->dp_config_rwlock);
+	dsl_dataset_rele(ds, FTAG);
+
+	return (0);
+}
+
+static void
+free_guid_map_onexit(void *arg)
+{
+	avl_tree_t *ca = arg;
+	void *cookie = NULL;
+	guid_map_entry_t *gmep;
+
+	while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) {
+		dsl_dataset_rele(gmep->gme_ds, ca);
+		kmem_free(gmep, sizeof (guid_map_entry_t));
+	}
+	avl_destroy(ca);
+	kmem_free(ca, sizeof (avl_tree_t));
+}
+
+static void *
+restore_read(struct restorearg *ra, int len)
+{
+	void *rv;
+	int done = 0;
+
+	/* some things will require 8-byte alignment, so everything must */
+	ASSERT3U(len % 8, ==, 0);
+
+	while (done < len) {
+		ssize_t resid;
+
+		ra->err = vn_rdwr(UIO_READ, ra->vp,
+		    (caddr_t)ra->buf + done, len - done,
+		    ra->voff, UIO_SYSSPACE, FAPPEND,
+		    RLIM64_INFINITY, CRED(), &resid);
+
+		if (resid == len - done)
+			ra->err = EINVAL;
+		ra->voff += len - done - resid;
+		done = len - resid;
+		if (ra->err)
+			return (NULL);
+	}
+
+	ASSERT3U(done, ==, len);
+	rv = ra->buf;
+	if (ra->byteswap)
+		fletcher_4_incremental_byteswap(rv, len, &ra->cksum);
+	else
+		fletcher_4_incremental_native(rv, len, &ra->cksum);
+	return (rv);
+}
+
+static void
+backup_byteswap(dmu_replay_record_t *drr)
+{
+#define	DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
+#define	DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X))
+	drr->drr_type = BSWAP_32(drr->drr_type);
+	drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen);
+	switch (drr->drr_type) {
+	case DRR_BEGIN:
+		DO64(drr_begin.drr_magic);
+		DO64(drr_begin.drr_versioninfo);
+		DO64(drr_begin.drr_creation_time);
+		DO32(drr_begin.drr_type);
+		DO32(drr_begin.drr_flags);
+		DO64(drr_begin.drr_toguid);
+		DO64(drr_begin.drr_fromguid);
+		break;
+	case DRR_OBJECT:
+		DO64(drr_object.drr_object);
+		/* DO64(drr_object.drr_allocation_txg); */
+		DO32(drr_object.drr_type);
+		DO32(drr_object.drr_bonustype);
+		DO32(drr_object.drr_blksz);
+		DO32(drr_object.drr_bonuslen);
+		DO64(drr_object.drr_toguid);
+		break;
+	case DRR_FREEOBJECTS:
+		DO64(drr_freeobjects.drr_firstobj);
+		DO64(drr_freeobjects.drr_numobjs);
+		DO64(drr_freeobjects.drr_toguid);
+		break;
+	case DRR_WRITE:
+		DO64(drr_write.drr_object);
+		DO32(drr_write.drr_type);
+		DO64(drr_write.drr_offset);
+		DO64(drr_write.drr_length);
+		DO64(drr_write.drr_toguid);
+		DO64(drr_write.drr_key.ddk_cksum.zc_word[0]);
+		DO64(drr_write.drr_key.ddk_cksum.zc_word[1]);
+		DO64(drr_write.drr_key.ddk_cksum.zc_word[2]);
+		DO64(drr_write.drr_key.ddk_cksum.zc_word[3]);
+		DO64(drr_write.drr_key.ddk_prop);
+		break;
+	case DRR_WRITE_BYREF:
+		DO64(drr_write_byref.drr_object);
+		DO64(drr_write_byref.drr_offset);
+		DO64(drr_write_byref.drr_length);
+		DO64(drr_write_byref.drr_toguid);
+		DO64(drr_write_byref.drr_refguid);
+		DO64(drr_write_byref.drr_refobject);
+		DO64(drr_write_byref.drr_refoffset);
+		DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[0]);
+		DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[1]);
+		DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[2]);
+		DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[3]);
+		DO64(drr_write_byref.drr_key.ddk_prop);
+		break;
+	case DRR_FREE:
+		DO64(drr_free.drr_object);
+		DO64(drr_free.drr_offset);
+		DO64(drr_free.drr_length);
+		DO64(drr_free.drr_toguid);
+		break;
+	case DRR_SPILL:
+		DO64(drr_spill.drr_object);
+		DO64(drr_spill.drr_length);
+		DO64(drr_spill.drr_toguid);
+		break;
+	case DRR_END:
+		DO64(drr_end.drr_checksum.zc_word[0]);
+		DO64(drr_end.drr_checksum.zc_word[1]);
+		DO64(drr_end.drr_checksum.zc_word[2]);
+		DO64(drr_end.drr_checksum.zc_word[3]);
+		DO64(drr_end.drr_toguid);
+		break;
+	}
+#undef DO64
+#undef DO32
+}
+
+static int
+restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
+{
+	int err;
+	dmu_tx_t *tx;
+	void *data = NULL;
+
+	if (drro->drr_type == DMU_OT_NONE ||
+	    drro->drr_type >= DMU_OT_NUMTYPES ||
+	    drro->drr_bonustype >= DMU_OT_NUMTYPES ||
+	    drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS ||
+	    drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS ||
+	    P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) ||
+	    drro->drr_blksz < SPA_MINBLOCKSIZE ||
+	    drro->drr_blksz > SPA_MAXBLOCKSIZE ||
+	    drro->drr_bonuslen > DN_MAX_BONUSLEN) {
+		return (EINVAL);
+	}
+
+	err = dmu_object_info(os, drro->drr_object, NULL);
+
+	if (err != 0 && err != ENOENT)
+		return (EINVAL);
+
+	if (drro->drr_bonuslen) {
+		data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8));
+		if (ra->err)
+			return (ra->err);
+	}
+
+	if (err == ENOENT) {
+		/* currently free, want to be allocated */
+		tx = dmu_tx_create(os);
+		dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
+		err = dmu_tx_assign(tx, TXG_WAIT);
+		if (err) {
+			dmu_tx_abort(tx);
+			return (err);
+		}
+		err = dmu_object_claim(os, drro->drr_object,
+		    drro->drr_type, drro->drr_blksz,
+		    drro->drr_bonustype, drro->drr_bonuslen, tx);
+		dmu_tx_commit(tx);
+	} else {
+		/* currently allocated, want to be allocated */
+		err = dmu_object_reclaim(os, drro->drr_object,
+		    drro->drr_type, drro->drr_blksz,
+		    drro->drr_bonustype, drro->drr_bonuslen);
+	}
+	if (err) {
+		return (EINVAL);
+	}
+
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_bonus(tx, drro->drr_object);
+	err = dmu_tx_assign(tx, TXG_WAIT);
+	if (err) {
+		dmu_tx_abort(tx);
+		return (err);
+	}
+
+	dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksumtype,
+	    tx);
+	dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx);
+
+	if (data != NULL) {
+		dmu_buf_t *db;
+
+		VERIFY(0 == dmu_bonus_hold(os, drro->drr_object, FTAG, &db));
+		dmu_buf_will_dirty(db, tx);
+
+		ASSERT3U(db->db_size, >=, drro->drr_bonuslen);
+		bcopy(data, db->db_data, drro->drr_bonuslen);
+		if (ra->byteswap) {
+			dmu_ot[drro->drr_bonustype].ot_byteswap(db->db_data,
+			    drro->drr_bonuslen);
+		}
+		dmu_buf_rele(db, FTAG);
+	}
+	dmu_tx_commit(tx);
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+restore_freeobjects(struct restorearg *ra, objset_t *os,
+    struct drr_freeobjects *drrfo)
+{
+	uint64_t obj;
+
+	if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj)
+		return (EINVAL);
+
+	for (obj = drrfo->drr_firstobj;
+	    obj < drrfo->drr_firstobj + drrfo->drr_numobjs;
+	    (void) dmu_object_next(os, &obj, FALSE, 0)) {
+		int err;
+
+		if (dmu_object_info(os, obj, NULL) != 0)
+			continue;
+
+		err = dmu_free_object(os, obj);
+		if (err)
+			return (err);
+	}
+	return (0);
+}
+
+static int
+restore_write(struct restorearg *ra, objset_t *os,
+    struct drr_write *drrw)
+{
+	dmu_tx_t *tx;
+	void *data;
+	int err;
+
+	if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset ||
+	    drrw->drr_type >= DMU_OT_NUMTYPES)
+		return (EINVAL);
+
+	data = restore_read(ra, drrw->drr_length);
+	if (data == NULL)
+		return (ra->err);
+
+	if (dmu_object_info(os, drrw->drr_object, NULL) != 0)
+		return (EINVAL);
+
+	tx = dmu_tx_create(os);
+
+	dmu_tx_hold_write(tx, drrw->drr_object,
+	    drrw->drr_offset, drrw->drr_length);
+	err = dmu_tx_assign(tx, TXG_WAIT);
+	if (err) {
+		dmu_tx_abort(tx);
+		return (err);
+	}
+	if (ra->byteswap)
+		dmu_ot[drrw->drr_type].ot_byteswap(data, drrw->drr_length);
+	dmu_write(os, drrw->drr_object,
+	    drrw->drr_offset, drrw->drr_length, data, tx);
+	dmu_tx_commit(tx);
+	return (0);
+}
+
+/*
+ * Handle a DRR_WRITE_BYREF record.  This record is used in dedup'ed
+ * streams to refer to a copy of the data that is already on the
+ * system because it came in earlier in the stream.  This function
+ * finds the earlier copy of the data, and uses that copy instead of
+ * data from the stream to fulfill this write.
+ */
+static int
+restore_write_byref(struct restorearg *ra, objset_t *os,
+    struct drr_write_byref *drrwbr)
+{
+	dmu_tx_t *tx;
+	int err;
+	guid_map_entry_t gmesrch;
+	guid_map_entry_t *gmep;
+	avl_index_t	where;
+	objset_t *ref_os = NULL;
+	dmu_buf_t *dbp;
+
+	if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset)
+		return (EINVAL);
+
+	/*
+	 * If the GUID of the referenced dataset is different from the
+	 * GUID of the target dataset, find the referenced dataset.
+	 */
+	if (drrwbr->drr_toguid != drrwbr->drr_refguid) {
+		gmesrch.guid = drrwbr->drr_refguid;
+		if ((gmep = avl_find(ra->guid_to_ds_map, &gmesrch,
+		    &where)) == NULL) {
+			return (EINVAL);
+		}
+		if (dmu_objset_from_ds(gmep->gme_ds, &ref_os))
+			return (EINVAL);
+	} else {
+		ref_os = os;
+	}
+
+	if (err = dmu_buf_hold(ref_os, drrwbr->drr_refobject,
+	    drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH))
+		return (err);
+
+	tx = dmu_tx_create(os);
+
+	dmu_tx_hold_write(tx, drrwbr->drr_object,
+	    drrwbr->drr_offset, drrwbr->drr_length);
+	err = dmu_tx_assign(tx, TXG_WAIT);
+	if (err) {
+		dmu_tx_abort(tx);
+		return (err);
+	}
+	dmu_write(os, drrwbr->drr_object,
+	    drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx);
+	dmu_buf_rele(dbp, FTAG);
+	dmu_tx_commit(tx);
+	return (0);
+}
+
+static int
+restore_spill(struct restorearg *ra, objset_t *os, struct drr_spill *drrs)
+{
+	dmu_tx_t *tx;
+	void *data;
+	dmu_buf_t *db, *db_spill;
+	int err;
+
+	if (drrs->drr_length < SPA_MINBLOCKSIZE ||
+	    drrs->drr_length > SPA_MAXBLOCKSIZE)
+		return (EINVAL);
+
+	data = restore_read(ra, drrs->drr_length);
+	if (data == NULL)
+		return (ra->err);
+
+	if (dmu_object_info(os, drrs->drr_object, NULL) != 0)
+		return (EINVAL);
+
+	VERIFY(0 == dmu_bonus_hold(os, drrs->drr_object, FTAG, &db));
+	if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) {
+		dmu_buf_rele(db, FTAG);
+		return (err);
+	}
+
+	tx = dmu_tx_create(os);
+
+	dmu_tx_hold_spill(tx, db->db_object);
+
+	err = dmu_tx_assign(tx, TXG_WAIT);
+	if (err) {
+		dmu_buf_rele(db, FTAG);
+		dmu_buf_rele(db_spill, FTAG);
+		dmu_tx_abort(tx);
+		return (err);
+	}
+	dmu_buf_will_dirty(db_spill, tx);
+
+	if (db_spill->db_size < drrs->drr_length)
+		VERIFY(0 == dbuf_spill_set_blksz(db_spill,
+		    drrs->drr_length, tx));
+	bcopy(data, db_spill->db_data, drrs->drr_length);
+
+	dmu_buf_rele(db, FTAG);
+	dmu_buf_rele(db_spill, FTAG);
+
+	dmu_tx_commit(tx);
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+restore_free(struct restorearg *ra, objset_t *os,
+    struct drr_free *drrf)
+{
+	int err;
+
+	if (drrf->drr_length != -1ULL &&
+	    drrf->drr_offset + drrf->drr_length < drrf->drr_offset)
+		return (EINVAL);
+
+	if (dmu_object_info(os, drrf->drr_object, NULL) != 0)
+		return (EINVAL);
+
+	err = dmu_free_long_range(os, drrf->drr_object,
+	    drrf->drr_offset, drrf->drr_length);
+	return (err);
+}
+
+/*
+ * NB: callers *must* call dmu_recv_end() if this succeeds.
+ */
+int
+dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp,
+    int cleanup_fd, uint64_t *action_handlep)
+{
+	struct restorearg ra = { 0 };
+	dmu_replay_record_t *drr;
+	objset_t *os;
+	zio_cksum_t pcksum;
+	int featureflags;
+
+	if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
+		ra.byteswap = TRUE;
+
+	{
+		/* compute checksum of drr_begin record */
+		dmu_replay_record_t *drr;
+		drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
+
+		drr->drr_type = DRR_BEGIN;
+		drr->drr_u.drr_begin = *drc->drc_drrb;
+		if (ra.byteswap) {
+			fletcher_4_incremental_byteswap(drr,
+			    sizeof (dmu_replay_record_t), &ra.cksum);
+		} else {
+			fletcher_4_incremental_native(drr,
+			    sizeof (dmu_replay_record_t), &ra.cksum);
+		}
+		kmem_free(drr, sizeof (dmu_replay_record_t));
+	}
+
+	if (ra.byteswap) {
+		struct drr_begin *drrb = drc->drc_drrb;
+		drrb->drr_magic = BSWAP_64(drrb->drr_magic);
+		drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo);
+		drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time);
+		drrb->drr_type = BSWAP_32(drrb->drr_type);
+		drrb->drr_toguid = BSWAP_64(drrb->drr_toguid);
+		drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid);
+	}
+
+	ra.vp = vp;
+	ra.voff = *voffp;
+	ra.bufsize = 1<<20;
+	ra.buf = kmem_alloc(ra.bufsize, KM_SLEEP);
+
+	/* these were verified in dmu_recv_begin */
+	ASSERT(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo) ==
+	    DMU_SUBSTREAM);
+	ASSERT(drc->drc_drrb->drr_type < DMU_OST_NUMTYPES);
+
+	/*
+	 * Open the objset we are modifying.
+	 */
+	VERIFY(dmu_objset_from_ds(drc->drc_real_ds, &os) == 0);
+
+	ASSERT(drc->drc_real_ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT);
+
+	featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo);
+
+	/* if this stream is dedup'ed, set up the avl tree for guid mapping */
+	if (featureflags & DMU_BACKUP_FEATURE_DEDUP) {
+		minor_t minor;
+
+		if (cleanup_fd == -1) {
+			ra.err = EBADF;
+			goto out;
+		}
+		ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor);
+		if (ra.err) {
+			cleanup_fd = -1;
+			goto out;
+		}
+
+		if (*action_handlep == 0) {
+			ra.guid_to_ds_map =
+			    kmem_alloc(sizeof (avl_tree_t), KM_SLEEP);
+			avl_create(ra.guid_to_ds_map, guid_compare,
+			    sizeof (guid_map_entry_t),
+			    offsetof(guid_map_entry_t, avlnode));
+			(void) dmu_objset_find(drc->drc_top_ds, find_ds_by_guid,
+			    (void *)ra.guid_to_ds_map,
+			    DS_FIND_CHILDREN);
+			ra.err = zfs_onexit_add_cb(minor,
+			    free_guid_map_onexit, ra.guid_to_ds_map,
+			    action_handlep);
+			if (ra.err)
+				goto out;
+		} else {
+			ra.err = zfs_onexit_cb_data(minor, *action_handlep,
+			    (void **)&ra.guid_to_ds_map);
+			if (ra.err)
+				goto out;
+		}
+	}
+
+	/*
+	 * Read records and process them.
+	 */
+	pcksum = ra.cksum;
+	while (ra.err == 0 &&
+	    NULL != (drr = restore_read(&ra, sizeof (*drr)))) {
+		if (issig(JUSTLOOKING) && issig(FORREAL)) {
+			ra.err = EINTR;
+			goto out;
+		}
+
+		if (ra.byteswap)
+			backup_byteswap(drr);
+
+		switch (drr->drr_type) {
+		case DRR_OBJECT:
+		{
+			/*
+			 * We need to make a copy of the record header,
+			 * because restore_{object,write} may need to
+			 * restore_read(), which will invalidate drr.
+			 */
+			struct drr_object drro = drr->drr_u.drr_object;
+			ra.err = restore_object(&ra, os, &drro);
+			break;
+		}
+		case DRR_FREEOBJECTS:
+		{
+			struct drr_freeobjects drrfo =
+			    drr->drr_u.drr_freeobjects;
+			ra.err = restore_freeobjects(&ra, os, &drrfo);
+			break;
+		}
+		case DRR_WRITE:
+		{
+			struct drr_write drrw = drr->drr_u.drr_write;
+			ra.err = restore_write(&ra, os, &drrw);
+			break;
+		}
+		case DRR_WRITE_BYREF:
+		{
+			struct drr_write_byref drrwbr =
+			    drr->drr_u.drr_write_byref;
+			ra.err = restore_write_byref(&ra, os, &drrwbr);
+			break;
+		}
+		case DRR_FREE:
+		{
+			struct drr_free drrf = drr->drr_u.drr_free;
+			ra.err = restore_free(&ra, os, &drrf);
+			break;
+		}
+		case DRR_END:
+		{
+			struct drr_end drre = drr->drr_u.drr_end;
+			/*
+			 * We compare against the *previous* checksum
+			 * value, because the stored checksum is of
+			 * everything before the DRR_END record.
+			 */
+			if (!ZIO_CHECKSUM_EQUAL(drre.drr_checksum, pcksum))
+				ra.err = ECKSUM;
+			goto out;
+		}
+		case DRR_SPILL:
+		{
+			struct drr_spill drrs = drr->drr_u.drr_spill;
+			ra.err = restore_spill(&ra, os, &drrs);
+			break;
+		}
+		default:
+			ra.err = EINVAL;
+			goto out;
+		}
+		pcksum = ra.cksum;
+	}
+	ASSERT(ra.err != 0);
+
+out:
+	if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1))
+		zfs_onexit_fd_rele(cleanup_fd);
+
+	if (ra.err != 0) {
+		/*
+		 * destroy what we created, so we don't leave it in the
+		 * inconsistent restoring state.
+		 */
+		txg_wait_synced(drc->drc_real_ds->ds_dir->dd_pool, 0);
+
+		(void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag,
+		    B_FALSE);
+		if (drc->drc_real_ds != drc->drc_logical_ds) {
+			mutex_exit(&drc->drc_logical_ds->ds_recvlock);
+			dsl_dataset_rele(drc->drc_logical_ds, dmu_recv_tag);
+		}
+	}
+
+	kmem_free(ra.buf, ra.bufsize);
+	*voffp = ra.voff;
+	return (ra.err);
+}
+
+struct recvendsyncarg {
+	char *tosnap;
+	uint64_t creation_time;
+	uint64_t toguid;
+};
+
+static int
+recv_end_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	struct recvendsyncarg *resa = arg2;
+
+	return (dsl_dataset_snapshot_check(ds, resa->tosnap, tx));
+}
+
+static void
+recv_end_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	struct recvendsyncarg *resa = arg2;
+
+	dsl_dataset_snapshot_sync(ds, resa->tosnap, tx);
+
+	/* set snapshot's creation time and guid */
+	dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
+	ds->ds_prev->ds_phys->ds_creation_time = resa->creation_time;
+	ds->ds_prev->ds_phys->ds_guid = resa->toguid;
+	ds->ds_prev->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
+
+	dmu_buf_will_dirty(ds->ds_dbuf, tx);
+	ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
+}
+
+static int
+dmu_recv_existing_end(dmu_recv_cookie_t *drc)
+{
+	struct recvendsyncarg resa;
+	dsl_dataset_t *ds = drc->drc_logical_ds;
+	int err;
+
+	/*
+	 * XXX hack; seems the ds is still dirty and dsl_pool_zil_clean()
+	 * expects it to have a ds_user_ptr (and zil), but clone_swap()
+	 * can close it.
+	 */
+	txg_wait_synced(ds->ds_dir->dd_pool, 0);
+
+	if (dsl_dataset_tryown(ds, FALSE, dmu_recv_tag)) {
+		err = dsl_dataset_clone_swap(drc->drc_real_ds, ds,
+		    drc->drc_force);
+		if (err)
+			goto out;
+	} else {
+		mutex_exit(&ds->ds_recvlock);
+		dsl_dataset_rele(ds, dmu_recv_tag);
+		(void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag,
+		    B_FALSE);
+		return (EBUSY);
+	}
+
+	resa.creation_time = drc->drc_drrb->drr_creation_time;
+	resa.toguid = drc->drc_drrb->drr_toguid;
+	resa.tosnap = drc->drc_tosnap;
+
+	err = dsl_sync_task_do(ds->ds_dir->dd_pool,
+	    recv_end_check, recv_end_sync, ds, &resa, 3);
+	if (err) {
+		/* swap back */
+		(void) dsl_dataset_clone_swap(drc->drc_real_ds, ds, B_TRUE);
+	}
+
+out:
+	mutex_exit(&ds->ds_recvlock);
+	dsl_dataset_disown(ds, dmu_recv_tag);
+	(void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE);
+	return (err);
+}
+
+static int
+dmu_recv_new_end(dmu_recv_cookie_t *drc)
+{
+	struct recvendsyncarg resa;
+	dsl_dataset_t *ds = drc->drc_logical_ds;
+	int err;
+
+	/*
+	 * XXX hack; seems the ds is still dirty and dsl_pool_zil_clean()
+	 * expects it to have a ds_user_ptr (and zil), but clone_swap()
+	 * can close it.
+	 */
+	txg_wait_synced(ds->ds_dir->dd_pool, 0);
+
+	resa.creation_time = drc->drc_drrb->drr_creation_time;
+	resa.toguid = drc->drc_drrb->drr_toguid;
+	resa.tosnap = drc->drc_tosnap;
+
+	err = dsl_sync_task_do(ds->ds_dir->dd_pool,
+	    recv_end_check, recv_end_sync, ds, &resa, 3);
+	if (err) {
+		/* clean up the fs we just recv'd into */
+		(void) dsl_dataset_destroy(ds, dmu_recv_tag, B_FALSE);
+	} else {
+		/* release the hold from dmu_recv_begin */
+		dsl_dataset_disown(ds, dmu_recv_tag);
+	}
+	return (err);
+}
+
+int
+dmu_recv_end(dmu_recv_cookie_t *drc)
+{
+	if (drc->drc_logical_ds != drc->drc_real_ds)
+		return (dmu_recv_existing_end(drc));
+	else
+		return (dmu_recv_new_end(drc));
+}
diff --git a/uts/common/fs/zfs/dmu_traverse.c b/uts/common/fs/zfs/dmu_traverse.c
new file mode 100644
index 000000000000..023f90e12e34
--- /dev/null
+++ b/uts/common/fs/zfs/dmu_traverse.c
@@ -0,0 +1,482 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/dmu_objset.h>
+#include <sys/dmu_traverse.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_pool.h>
+#include <sys/dnode.h>
+#include <sys/spa.h>
+#include <sys/zio.h>
+#include <sys/dmu_impl.h>
+#include <sys/sa.h>
+#include <sys/sa_impl.h>
+#include <sys/callb.h>
+
+int zfs_pd_blks_max = 100;
+
+typedef struct prefetch_data {
+	kmutex_t pd_mtx;
+	kcondvar_t pd_cv;
+	int pd_blks_max;
+	int pd_blks_fetched;
+	int pd_flags;
+	boolean_t pd_cancel;
+	boolean_t pd_exited;
+} prefetch_data_t;
+
+typedef struct traverse_data {
+	spa_t *td_spa;
+	uint64_t td_objset;
+	blkptr_t *td_rootbp;
+	uint64_t td_min_txg;
+	int td_flags;
+	prefetch_data_t *td_pfd;
+	blkptr_cb_t *td_func;
+	void *td_arg;
+} traverse_data_t;
+
+static int traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
+    arc_buf_t *buf, uint64_t objset, uint64_t object);
+
+static int
+traverse_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg)
+{
+	traverse_data_t *td = arg;
+	zbookmark_t zb;
+
+	if (bp->blk_birth == 0)
+		return (0);
+
+	if (claim_txg == 0 && bp->blk_birth >= spa_first_txg(td->td_spa))
+		return (0);
+
+	SET_BOOKMARK(&zb, td->td_objset, ZB_ZIL_OBJECT, ZB_ZIL_LEVEL,
+	    bp->blk_cksum.zc_word[ZIL_ZC_SEQ]);
+
+	(void) td->td_func(td->td_spa, zilog, bp, NULL, &zb, NULL, td->td_arg);
+
+	return (0);
+}
+
+static int
+traverse_zil_record(zilog_t *zilog, lr_t *lrc, void *arg, uint64_t claim_txg)
+{
+	traverse_data_t *td = arg;
+
+	if (lrc->lrc_txtype == TX_WRITE) {
+		lr_write_t *lr = (lr_write_t *)lrc;
+		blkptr_t *bp = &lr->lr_blkptr;
+		zbookmark_t zb;
+
+		if (bp->blk_birth == 0)
+			return (0);
+
+		if (claim_txg == 0 || bp->blk_birth < claim_txg)
+			return (0);
+
+		SET_BOOKMARK(&zb, td->td_objset, lr->lr_foid,
+		    ZB_ZIL_LEVEL, lr->lr_offset / BP_GET_LSIZE(bp));
+
+		(void) td->td_func(td->td_spa, zilog, bp, NULL, &zb, NULL,
+		    td->td_arg);
+	}
+	return (0);
+}
+
+static void
+traverse_zil(traverse_data_t *td, zil_header_t *zh)
+{
+	uint64_t claim_txg = zh->zh_claim_txg;
+	zilog_t *zilog;
+
+	/*
+	 * We only want to visit blocks that have been claimed but not yet
+	 * replayed; plus, in read-only mode, blocks that are already stable.
+	 */
+	if (claim_txg == 0 && spa_writeable(td->td_spa))
+		return;
+
+	zilog = zil_alloc(spa_get_dsl(td->td_spa)->dp_meta_objset, zh);
+
+	(void) zil_parse(zilog, traverse_zil_block, traverse_zil_record, td,
+	    claim_txg);
+
+	zil_free(zilog);
+}
+
+static int
+traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
+    arc_buf_t *pbuf, blkptr_t *bp, const zbookmark_t *zb)
+{
+	zbookmark_t czb;
+	int err = 0, lasterr = 0;
+	arc_buf_t *buf = NULL;
+	prefetch_data_t *pd = td->td_pfd;
+	boolean_t hard = td->td_flags & TRAVERSE_HARD;
+
+	if (bp->blk_birth == 0) {
+		err = td->td_func(td->td_spa, NULL, NULL, pbuf, zb, dnp,
+		    td->td_arg);
+		return (err);
+	}
+
+	if (bp->blk_birth <= td->td_min_txg)
+		return (0);
+
+	if (pd && !pd->pd_exited &&
+	    ((pd->pd_flags & TRAVERSE_PREFETCH_DATA) ||
+	    BP_GET_TYPE(bp) == DMU_OT_DNODE || BP_GET_LEVEL(bp) > 0)) {
+		mutex_enter(&pd->pd_mtx);
+		ASSERT(pd->pd_blks_fetched >= 0);
+		while (pd->pd_blks_fetched == 0 && !pd->pd_exited)
+			cv_wait(&pd->pd_cv, &pd->pd_mtx);
+		pd->pd_blks_fetched--;
+		cv_broadcast(&pd->pd_cv);
+		mutex_exit(&pd->pd_mtx);
+	}
+
+	if (td->td_flags & TRAVERSE_PRE) {
+		err = td->td_func(td->td_spa, NULL, bp, pbuf, zb, dnp,
+		    td->td_arg);
+		if (err == TRAVERSE_VISIT_NO_CHILDREN)
+			return (0);
+		if (err)
+			return (err);
+	}
+
+	if (BP_GET_LEVEL(bp) > 0) {
+		uint32_t flags = ARC_WAIT;
+		int i;
+		blkptr_t *cbp;
+		int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
+
+		err = dsl_read(NULL, td->td_spa, bp, pbuf,
+		    arc_getbuf_func, &buf,
+		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
+		if (err)
+			return (err);
+
+		/* recursively visitbp() blocks below this */
+		cbp = buf->b_data;
+		for (i = 0; i < epb; i++, cbp++) {
+			SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
+			    zb->zb_level - 1,
+			    zb->zb_blkid * epb + i);
+			err = traverse_visitbp(td, dnp, buf, cbp, &czb);
+			if (err) {
+				if (!hard)
+					break;
+				lasterr = err;
+			}
+		}
+	} else if (BP_GET_TYPE(bp) == DMU_OT_DNODE) {
+		uint32_t flags = ARC_WAIT;
+		int i;
+		int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT;
+
+		err = dsl_read(NULL, td->td_spa, bp, pbuf,
+		    arc_getbuf_func, &buf,
+		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
+		if (err)
+			return (err);
+
+		/* recursively visitbp() blocks below this */
+		dnp = buf->b_data;
+		for (i = 0; i < epb; i++, dnp++) {
+			err = traverse_dnode(td, dnp, buf, zb->zb_objset,
+			    zb->zb_blkid * epb + i);
+			if (err) {
+				if (!hard)
+					break;
+				lasterr = err;
+			}
+		}
+	} else if (BP_GET_TYPE(bp) == DMU_OT_OBJSET) {
+		uint32_t flags = ARC_WAIT;
+		objset_phys_t *osp;
+		dnode_phys_t *dnp;
+
+		err = dsl_read_nolock(NULL, td->td_spa, bp,
+		    arc_getbuf_func, &buf,
+		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
+		if (err)
+			return (err);
+
+		osp = buf->b_data;
+		dnp = &osp->os_meta_dnode;
+		err = traverse_dnode(td, dnp, buf, zb->zb_objset,
+		    DMU_META_DNODE_OBJECT);
+		if (err && hard) {
+			lasterr = err;
+			err = 0;
+		}
+		if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) {
+			dnp = &osp->os_userused_dnode;
+			err = traverse_dnode(td, dnp, buf, zb->zb_objset,
+			    DMU_USERUSED_OBJECT);
+		}
+		if (err && hard) {
+			lasterr = err;
+			err = 0;
+		}
+		if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) {
+			dnp = &osp->os_groupused_dnode;
+			err = traverse_dnode(td, dnp, buf, zb->zb_objset,
+			    DMU_GROUPUSED_OBJECT);
+		}
+	}
+
+	if (buf)
+		(void) arc_buf_remove_ref(buf, &buf);
+
+	if (err == 0 && lasterr == 0 && (td->td_flags & TRAVERSE_POST)) {
+		err = td->td_func(td->td_spa, NULL, bp, pbuf, zb, dnp,
+		    td->td_arg);
+	}
+
+	return (err != 0 ? err : lasterr);
+}
+
+static int
+traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
+    arc_buf_t *buf, uint64_t objset, uint64_t object)
+{
+	int j, err = 0, lasterr = 0;
+	zbookmark_t czb;
+	boolean_t hard = (td->td_flags & TRAVERSE_HARD);
+
+	for (j = 0; j < dnp->dn_nblkptr; j++) {
+		SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j);
+		err = traverse_visitbp(td, dnp, buf,
+		    (blkptr_t *)&dnp->dn_blkptr[j], &czb);
+		if (err) {
+			if (!hard)
+				break;
+			lasterr = err;
+		}
+	}
+
+	if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) {
+		SET_BOOKMARK(&czb, objset,
+		    object, 0, DMU_SPILL_BLKID);
+		err = traverse_visitbp(td, dnp, buf,
+		    (blkptr_t *)&dnp->dn_spill, &czb);
+		if (err) {
+			if (!hard)
+				return (err);
+			lasterr = err;
+		}
+	}
+	return (err != 0 ? err : lasterr);
+}
+
+/* ARGSUSED */
+static int
+traverse_prefetcher(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
+    arc_buf_t *pbuf, const zbookmark_t *zb, const dnode_phys_t *dnp,
+    void *arg)
+{
+	prefetch_data_t *pfd = arg;
+	uint32_t aflags = ARC_NOWAIT | ARC_PREFETCH;
+
+	ASSERT(pfd->pd_blks_fetched >= 0);
+	if (pfd->pd_cancel)
+		return (EINTR);
+
+	if (bp == NULL || !((pfd->pd_flags & TRAVERSE_PREFETCH_DATA) ||
+	    BP_GET_TYPE(bp) == DMU_OT_DNODE || BP_GET_LEVEL(bp) > 0) ||
+	    BP_GET_TYPE(bp) == DMU_OT_INTENT_LOG)
+		return (0);
+
+	mutex_enter(&pfd->pd_mtx);
+	while (!pfd->pd_cancel && pfd->pd_blks_fetched >= pfd->pd_blks_max)
+		cv_wait(&pfd->pd_cv, &pfd->pd_mtx);
+	pfd->pd_blks_fetched++;
+	cv_broadcast(&pfd->pd_cv);
+	mutex_exit(&pfd->pd_mtx);
+
+	(void) dsl_read(NULL, spa, bp, pbuf, NULL, NULL,
+	    ZIO_PRIORITY_ASYNC_READ,
+	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
+	    &aflags, zb);
+
+	return (0);
+}
+
+static void
+traverse_prefetch_thread(void *arg)
+{
+	traverse_data_t *td_main = arg;
+	traverse_data_t td = *td_main;
+	zbookmark_t czb;
+
+	td.td_func = traverse_prefetcher;
+	td.td_arg = td_main->td_pfd;
+	td.td_pfd = NULL;
+
+	SET_BOOKMARK(&czb, td.td_objset,
+	    ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
+	(void) traverse_visitbp(&td, NULL, NULL, td.td_rootbp, &czb);
+
+	mutex_enter(&td_main->td_pfd->pd_mtx);
+	td_main->td_pfd->pd_exited = B_TRUE;
+	cv_broadcast(&td_main->td_pfd->pd_cv);
+	mutex_exit(&td_main->td_pfd->pd_mtx);
+}
+
+/*
+ * NB: dataset must not be changing on-disk (eg, is a snapshot or we are
+ * in syncing context).
+ */
+static int
+traverse_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *rootbp,
+    uint64_t txg_start, int flags, blkptr_cb_t func, void *arg)
+{
+	traverse_data_t td;
+	prefetch_data_t pd = { 0 };
+	zbookmark_t czb;
+	int err;
+
+	td.td_spa = spa;
+	td.td_objset = ds ? ds->ds_object : 0;
+	td.td_rootbp = rootbp;
+	td.td_min_txg = txg_start;
+	td.td_func = func;
+	td.td_arg = arg;
+	td.td_pfd = &pd;
+	td.td_flags = flags;
+
+	pd.pd_blks_max = zfs_pd_blks_max;
+	pd.pd_flags = flags;
+	mutex_init(&pd.pd_mtx, NULL, MUTEX_DEFAULT, NULL);
+	cv_init(&pd.pd_cv, NULL, CV_DEFAULT, NULL);
+
+	/* See comment on ZIL traversal in dsl_scan_visitds. */
+	if (ds != NULL && !dsl_dataset_is_snapshot(ds)) {
+		objset_t *os;
+
+		err = dmu_objset_from_ds(ds, &os);
+		if (err)
+			return (err);
+
+		traverse_zil(&td, &os->os_zil_header);
+	}
+
+	if (!(flags & TRAVERSE_PREFETCH) ||
+	    0 == taskq_dispatch(system_taskq, traverse_prefetch_thread,
+	    &td, TQ_NOQUEUE))
+		pd.pd_exited = B_TRUE;
+
+	SET_BOOKMARK(&czb, td.td_objset,
+	    ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
+	err = traverse_visitbp(&td, NULL, NULL, rootbp, &czb);
+
+	mutex_enter(&pd.pd_mtx);
+	pd.pd_cancel = B_TRUE;
+	cv_broadcast(&pd.pd_cv);
+	while (!pd.pd_exited)
+		cv_wait(&pd.pd_cv, &pd.pd_mtx);
+	mutex_exit(&pd.pd_mtx);
+
+	mutex_destroy(&pd.pd_mtx);
+	cv_destroy(&pd.pd_cv);
+
+	return (err);
+}
+
+/*
+ * NB: dataset must not be changing on-disk (eg, is a snapshot or we are
+ * in syncing context).
+ */
+int
+traverse_dataset(dsl_dataset_t *ds, uint64_t txg_start, int flags,
+    blkptr_cb_t func, void *arg)
+{
+	return (traverse_impl(ds->ds_dir->dd_pool->dp_spa, ds,
+	    &ds->ds_phys->ds_bp, txg_start, flags, func, arg));
+}
+
+/*
+ * NB: pool must not be changing on-disk (eg, from zdb or sync context).
+ */
+int
+traverse_pool(spa_t *spa, uint64_t txg_start, int flags,
+    blkptr_cb_t func, void *arg)
+{
+	int err, lasterr = 0;
+	uint64_t obj;
+	dsl_pool_t *dp = spa_get_dsl(spa);
+	objset_t *mos = dp->dp_meta_objset;
+	boolean_t hard = (flags & TRAVERSE_HARD);
+
+	/* visit the MOS */
+	err = traverse_impl(spa, NULL, spa_get_rootblkptr(spa),
+	    txg_start, flags, func, arg);
+	if (err)
+		return (err);
+
+	/* visit each dataset */
+	for (obj = 1; err == 0 || (err != ESRCH && hard);
+	    err = dmu_object_next(mos, &obj, FALSE, txg_start)) {
+		dmu_object_info_t doi;
+
+		err = dmu_object_info(mos, obj, &doi);
+		if (err) {
+			if (!hard)
+				return (err);
+			lasterr = err;
+			continue;
+		}
+
+		if (doi.doi_type == DMU_OT_DSL_DATASET) {
+			dsl_dataset_t *ds;
+			uint64_t txg = txg_start;
+
+			rw_enter(&dp->dp_config_rwlock, RW_READER);
+			err = dsl_dataset_hold_obj(dp, obj, FTAG, &ds);
+			rw_exit(&dp->dp_config_rwlock);
+			if (err) {
+				if (!hard)
+					return (err);
+				lasterr = err;
+				continue;
+			}
+			if (ds->ds_phys->ds_prev_snap_txg > txg)
+				txg = ds->ds_phys->ds_prev_snap_txg;
+			err = traverse_dataset(ds, txg, flags, func, arg);
+			dsl_dataset_rele(ds, FTAG);
+			if (err) {
+				if (!hard)
+					return (err);
+				lasterr = err;
+			}
+		}
+	}
+	if (err == ESRCH)
+		err = 0;
+	return (err != 0 ? err : lasterr);
+}
diff --git a/uts/common/fs/zfs/dmu_tx.c b/uts/common/fs/zfs/dmu_tx.c
new file mode 100644
index 000000000000..bd5c71a2265e
--- /dev/null
+++ b/uts/common/fs/zfs/dmu_tx.c
@@ -0,0 +1,1382 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/dmu.h>
+#include <sys/dmu_impl.h>
+#include <sys/dbuf.h>
+#include <sys/dmu_tx.h>
+#include <sys/dmu_objset.h>
+#include <sys/dsl_dataset.h> /* for dsl_dataset_block_freeable() */
+#include <sys/dsl_dir.h> /* for dsl_dir_tempreserve_*() */
+#include <sys/dsl_pool.h>
+#include <sys/zap_impl.h> /* for fzap_default_block_shift */
+#include <sys/spa.h>
+#include <sys/sa.h>
+#include <sys/sa_impl.h>
+#include <sys/zfs_context.h>
+#include <sys/varargs.h>
+
+typedef void (*dmu_tx_hold_func_t)(dmu_tx_t *tx, struct dnode *dn,
+    uint64_t arg1, uint64_t arg2);
+
+
+dmu_tx_t *
+dmu_tx_create_dd(dsl_dir_t *dd)
+{
+	dmu_tx_t *tx = kmem_zalloc(sizeof (dmu_tx_t), KM_SLEEP);
+	tx->tx_dir = dd;
+	if (dd)
+		tx->tx_pool = dd->dd_pool;
+	list_create(&tx->tx_holds, sizeof (dmu_tx_hold_t),
+	    offsetof(dmu_tx_hold_t, txh_node));
+	list_create(&tx->tx_callbacks, sizeof (dmu_tx_callback_t),
+	    offsetof(dmu_tx_callback_t, dcb_node));
+#ifdef ZFS_DEBUG
+	refcount_create(&tx->tx_space_written);
+	refcount_create(&tx->tx_space_freed);
+#endif
+	return (tx);
+}
+
+dmu_tx_t *
+dmu_tx_create(objset_t *os)
+{
+	dmu_tx_t *tx = dmu_tx_create_dd(os->os_dsl_dataset->ds_dir);
+	tx->tx_objset = os;
+	tx->tx_lastsnap_txg = dsl_dataset_prev_snap_txg(os->os_dsl_dataset);
+	return (tx);
+}
+
+dmu_tx_t *
+dmu_tx_create_assigned(struct dsl_pool *dp, uint64_t txg)
+{
+	dmu_tx_t *tx = dmu_tx_create_dd(NULL);
+
+	ASSERT3U(txg, <=, dp->dp_tx.tx_open_txg);
+	tx->tx_pool = dp;
+	tx->tx_txg = txg;
+	tx->tx_anyobj = TRUE;
+
+	return (tx);
+}
+
+int
+dmu_tx_is_syncing(dmu_tx_t *tx)
+{
+	return (tx->tx_anyobj);
+}
+
+int
+dmu_tx_private_ok(dmu_tx_t *tx)
+{
+	return (tx->tx_anyobj);
+}
+
+static dmu_tx_hold_t *
+dmu_tx_hold_object_impl(dmu_tx_t *tx, objset_t *os, uint64_t object,
+    enum dmu_tx_hold_type type, uint64_t arg1, uint64_t arg2)
+{
+	dmu_tx_hold_t *txh;
+	dnode_t *dn = NULL;
+	int err;
+
+	if (object != DMU_NEW_OBJECT) {
+		err = dnode_hold(os, object, tx, &dn);
+		if (err) {
+			tx->tx_err = err;
+			return (NULL);
+		}
+
+		if (err == 0 && tx->tx_txg != 0) {
+			mutex_enter(&dn->dn_mtx);
+			/*
+			 * dn->dn_assigned_txg == tx->tx_txg doesn't pose a
+			 * problem, but there's no way for it to happen (for
+			 * now, at least).
+			 */
+			ASSERT(dn->dn_assigned_txg == 0);
+			dn->dn_assigned_txg = tx->tx_txg;
+			(void) refcount_add(&dn->dn_tx_holds, tx);
+			mutex_exit(&dn->dn_mtx);
+		}
+	}
+
+	txh = kmem_zalloc(sizeof (dmu_tx_hold_t), KM_SLEEP);
+	txh->txh_tx = tx;
+	txh->txh_dnode = dn;
+#ifdef ZFS_DEBUG
+	txh->txh_type = type;
+	txh->txh_arg1 = arg1;
+	txh->txh_arg2 = arg2;
+#endif
+	list_insert_tail(&tx->tx_holds, txh);
+
+	return (txh);
+}
+
+void
+dmu_tx_add_new_object(dmu_tx_t *tx, objset_t *os, uint64_t object)
+{
+	/*
+	 * If we're syncing, they can manipulate any object anyhow, and
+	 * the hold on the dnode_t can cause problems.
+	 */
+	if (!dmu_tx_is_syncing(tx)) {
+		(void) dmu_tx_hold_object_impl(tx, os,
+		    object, THT_NEWOBJECT, 0, 0);
+	}
+}
+
+static int
+dmu_tx_check_ioerr(zio_t *zio, dnode_t *dn, int level, uint64_t blkid)
+{
+	int err;
+	dmu_buf_impl_t *db;
+
+	rw_enter(&dn->dn_struct_rwlock, RW_READER);
+	db = dbuf_hold_level(dn, level, blkid, FTAG);
+	rw_exit(&dn->dn_struct_rwlock);
+	if (db == NULL)
+		return (EIO);
+	err = dbuf_read(db, zio, DB_RF_CANFAIL | DB_RF_NOPREFETCH);
+	dbuf_rele(db, FTAG);
+	return (err);
+}
+
+static void
+dmu_tx_count_twig(dmu_tx_hold_t *txh, dnode_t *dn, dmu_buf_impl_t *db,
+    int level, uint64_t blkid, boolean_t freeable, uint64_t *history)
+{
+	objset_t *os = dn->dn_objset;
+	dsl_dataset_t *ds = os->os_dsl_dataset;
+	int epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
+	dmu_buf_impl_t *parent = NULL;
+	blkptr_t *bp = NULL;
+	uint64_t space;
+
+	if (level >= dn->dn_nlevels || history[level] == blkid)
+		return;
+
+	history[level] = blkid;
+
+	space = (level == 0) ? dn->dn_datablksz : (1ULL << dn->dn_indblkshift);
+
+	if (db == NULL || db == dn->dn_dbuf) {
+		ASSERT(level != 0);
+		db = NULL;
+	} else {
+		ASSERT(DB_DNODE(db) == dn);
+		ASSERT(db->db_level == level);
+		ASSERT(db->db.db_size == space);
+		ASSERT(db->db_blkid == blkid);
+		bp = db->db_blkptr;
+		parent = db->db_parent;
+	}
+
+	freeable = (bp && (freeable ||
+	    dsl_dataset_block_freeable(ds, bp, bp->blk_birth)));
+
+	if (freeable)
+		txh->txh_space_tooverwrite += space;
+	else
+		txh->txh_space_towrite += space;
+	if (bp)
+		txh->txh_space_tounref += bp_get_dsize(os->os_spa, bp);
+
+	dmu_tx_count_twig(txh, dn, parent, level + 1,
+	    blkid >> epbs, freeable, history);
+}
+
+/* ARGSUSED */
+static void
+dmu_tx_count_write(dmu_tx_hold_t *txh, uint64_t off, uint64_t len)
+{
+	dnode_t *dn = txh->txh_dnode;
+	uint64_t start, end, i;
+	int min_bs, max_bs, min_ibs, max_ibs, epbs, bits;
+	int err = 0;
+
+	if (len == 0)
+		return;
+
+	min_bs = SPA_MINBLOCKSHIFT;
+	max_bs = SPA_MAXBLOCKSHIFT;
+	min_ibs = DN_MIN_INDBLKSHIFT;
+	max_ibs = DN_MAX_INDBLKSHIFT;
+
+	if (dn) {
+		uint64_t history[DN_MAX_LEVELS];
+		int nlvls = dn->dn_nlevels;
+		int delta;
+
+		/*
+		 * For i/o error checking, read the first and last level-0
+		 * blocks (if they are not aligned), and all the level-1 blocks.
+		 */
+		if (dn->dn_maxblkid == 0) {
+			delta = dn->dn_datablksz;
+			start = (off < dn->dn_datablksz) ? 0 : 1;
+			end = (off+len <= dn->dn_datablksz) ? 0 : 1;
+			if (start == 0 && (off > 0 || len < dn->dn_datablksz)) {
+				err = dmu_tx_check_ioerr(NULL, dn, 0, 0);
+				if (err)
+					goto out;
+				delta -= off;
+			}
+		} else {
+			zio_t *zio = zio_root(dn->dn_objset->os_spa,
+			    NULL, NULL, ZIO_FLAG_CANFAIL);
+
+			/* first level-0 block */
+			start = off >> dn->dn_datablkshift;
+			if (P2PHASE(off, dn->dn_datablksz) ||
+			    len < dn->dn_datablksz) {
+				err = dmu_tx_check_ioerr(zio, dn, 0, start);
+				if (err)
+					goto out;
+			}
+
+			/* last level-0 block */
+			end = (off+len-1) >> dn->dn_datablkshift;
+			if (end != start && end <= dn->dn_maxblkid &&
+			    P2PHASE(off+len, dn->dn_datablksz)) {
+				err = dmu_tx_check_ioerr(zio, dn, 0, end);
+				if (err)
+					goto out;
+			}
+
+			/* level-1 blocks */
+			if (nlvls > 1) {
+				int shft = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
+				for (i = (start>>shft)+1; i < end>>shft; i++) {
+					err = dmu_tx_check_ioerr(zio, dn, 1, i);
+					if (err)
+						goto out;
+				}
+			}
+
+			err = zio_wait(zio);
+			if (err)
+				goto out;
+			delta = P2NPHASE(off, dn->dn_datablksz);
+		}
+
+		if (dn->dn_maxblkid > 0) {
+			/*
+			 * The blocksize can't change,
+			 * so we can make a more precise estimate.
+			 */
+			ASSERT(dn->dn_datablkshift != 0);
+			min_bs = max_bs = dn->dn_datablkshift;
+			min_ibs = max_ibs = dn->dn_indblkshift;
+		} else if (dn->dn_indblkshift > max_ibs) {
+			/*
+			 * This ensures that if we reduce DN_MAX_INDBLKSHIFT,
+			 * the code will still work correctly on older pools.
+			 */
+			min_ibs = max_ibs = dn->dn_indblkshift;
+		}
+
+		/*
+		 * If this write is not off the end of the file
+		 * we need to account for overwrites/unref.
+		 */
+		if (start <= dn->dn_maxblkid) {
+			for (int l = 0; l < DN_MAX_LEVELS; l++)
+				history[l] = -1ULL;
+		}
+		while (start <= dn->dn_maxblkid) {
+			dmu_buf_impl_t *db;
+
+			rw_enter(&dn->dn_struct_rwlock, RW_READER);
+			err = dbuf_hold_impl(dn, 0, start, FALSE, FTAG, &db);
+			rw_exit(&dn->dn_struct_rwlock);
+
+			if (err) {
+				txh->txh_tx->tx_err = err;
+				return;
+			}
+
+			dmu_tx_count_twig(txh, dn, db, 0, start, B_FALSE,
+			    history);
+			dbuf_rele(db, FTAG);
+			if (++start > end) {
+				/*
+				 * Account for new indirects appearing
+				 * before this IO gets assigned into a txg.
+				 */
+				bits = 64 - min_bs;
+				epbs = min_ibs - SPA_BLKPTRSHIFT;
+				for (bits -= epbs * (nlvls - 1);
+				    bits >= 0; bits -= epbs)
+					txh->txh_fudge += 1ULL << max_ibs;
+				goto out;
+			}
+			off += delta;
+			if (len >= delta)
+				len -= delta;
+			delta = dn->dn_datablksz;
+		}
+	}
+
+	/*
+	 * 'end' is the last thing we will access, not one past.
+	 * This way we won't overflow when accessing the last byte.
+	 */
+	start = P2ALIGN(off, 1ULL << max_bs);
+	end = P2ROUNDUP(off + len, 1ULL << max_bs) - 1;
+	txh->txh_space_towrite += end - start + 1;
+
+	start >>= min_bs;
+	end >>= min_bs;
+
+	epbs = min_ibs - SPA_BLKPTRSHIFT;
+
+	/*
+	 * The object contains at most 2^(64 - min_bs) blocks,
+	 * and each indirect level maps 2^epbs.
+	 */
+	for (bits = 64 - min_bs; bits >= 0; bits -= epbs) {
+		start >>= epbs;
+		end >>= epbs;
+		ASSERT3U(end, >=, start);
+		txh->txh_space_towrite += (end - start + 1) << max_ibs;
+		if (start != 0) {
+			/*
+			 * We also need a new blkid=0 indirect block
+			 * to reference any existing file data.
+			 */
+			txh->txh_space_towrite += 1ULL << max_ibs;
+		}
+	}
+
+out:
+	if (txh->txh_space_towrite + txh->txh_space_tooverwrite >
+	    2 * DMU_MAX_ACCESS)
+		err = EFBIG;
+
+	if (err)
+		txh->txh_tx->tx_err = err;
+}
+
+static void
+dmu_tx_count_dnode(dmu_tx_hold_t *txh)
+{
+	dnode_t *dn = txh->txh_dnode;
+	dnode_t *mdn = DMU_META_DNODE(txh->txh_tx->tx_objset);
+	uint64_t space = mdn->dn_datablksz +
+	    ((mdn->dn_nlevels-1) << mdn->dn_indblkshift);
+
+	if (dn && dn->dn_dbuf->db_blkptr &&
+	    dsl_dataset_block_freeable(dn->dn_objset->os_dsl_dataset,
+	    dn->dn_dbuf->db_blkptr, dn->dn_dbuf->db_blkptr->blk_birth)) {
+		txh->txh_space_tooverwrite += space;
+		txh->txh_space_tounref += space;
+	} else {
+		txh->txh_space_towrite += space;
+		if (dn && dn->dn_dbuf->db_blkptr)
+			txh->txh_space_tounref += space;
+	}
+}
+
+void
+dmu_tx_hold_write(dmu_tx_t *tx, uint64_t object, uint64_t off, int len)
+{
+	dmu_tx_hold_t *txh;
+
+	ASSERT(tx->tx_txg == 0);
+	ASSERT(len < DMU_MAX_ACCESS);
+	ASSERT(len == 0 || UINT64_MAX - off >= len - 1);
+
+	txh = dmu_tx_hold_object_impl(tx, tx->tx_objset,
+	    object, THT_WRITE, off, len);
+	if (txh == NULL)
+		return;
+
+	dmu_tx_count_write(txh, off, len);
+	dmu_tx_count_dnode(txh);
+}
+
+static void
+dmu_tx_count_free(dmu_tx_hold_t *txh, uint64_t off, uint64_t len)
+{
+	uint64_t blkid, nblks, lastblk;
+	uint64_t space = 0, unref = 0, skipped = 0;
+	dnode_t *dn = txh->txh_dnode;
+	dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset;
+	spa_t *spa = txh->txh_tx->tx_pool->dp_spa;
+	int epbs;
+
+	if (dn->dn_nlevels == 0)
+		return;
+
+	/*
+	 * The struct_rwlock protects us against dn_nlevels
+	 * changing, in case (against all odds) we manage to dirty &
+	 * sync out the changes after we check for being dirty.
+	 * Also, dbuf_hold_impl() wants us to have the struct_rwlock.
+	 */
+	rw_enter(&dn->dn_struct_rwlock, RW_READER);
+	epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
+	if (dn->dn_maxblkid == 0) {
+		if (off == 0 && len >= dn->dn_datablksz) {
+			blkid = 0;
+			nblks = 1;
+		} else {
+			rw_exit(&dn->dn_struct_rwlock);
+			return;
+		}
+	} else {
+		blkid = off >> dn->dn_datablkshift;
+		nblks = (len + dn->dn_datablksz - 1) >> dn->dn_datablkshift;
+
+		if (blkid >= dn->dn_maxblkid) {
+			rw_exit(&dn->dn_struct_rwlock);
+			return;
+		}
+		if (blkid + nblks > dn->dn_maxblkid)
+			nblks = dn->dn_maxblkid - blkid;
+
+	}
+	if (dn->dn_nlevels == 1) {
+		int i;
+		for (i = 0; i < nblks; i++) {
+			blkptr_t *bp = dn->dn_phys->dn_blkptr;
+			ASSERT3U(blkid + i, <, dn->dn_nblkptr);
+			bp += blkid + i;
+			if (dsl_dataset_block_freeable(ds, bp, bp->blk_birth)) {
+				dprintf_bp(bp, "can free old%s", "");
+				space += bp_get_dsize(spa, bp);
+			}
+			unref += BP_GET_ASIZE(bp);
+		}
+		nblks = 0;
+	}
+
+	/*
+	 * Add in memory requirements of higher-level indirects.
+	 * This assumes a worst-possible scenario for dn_nlevels.
+	 */
+	{
+		uint64_t blkcnt = 1 + ((nblks >> epbs) >> epbs);
+		int level = (dn->dn_nlevels > 1) ? 2 : 1;
+
+		while (level++ < DN_MAX_LEVELS) {
+			txh->txh_memory_tohold += blkcnt << dn->dn_indblkshift;
+			blkcnt = 1 + (blkcnt >> epbs);
+		}
+		ASSERT(blkcnt <= dn->dn_nblkptr);
+	}
+
+	lastblk = blkid + nblks - 1;
+	while (nblks) {
+		dmu_buf_impl_t *dbuf;
+		uint64_t ibyte, new_blkid;
+		int epb = 1 << epbs;
+		int err, i, blkoff, tochk;
+		blkptr_t *bp;
+
+		ibyte = blkid << dn->dn_datablkshift;
+		err = dnode_next_offset(dn,
+		    DNODE_FIND_HAVELOCK, &ibyte, 2, 1, 0);
+		new_blkid = ibyte >> dn->dn_datablkshift;
+		if (err == ESRCH) {
+			skipped += (lastblk >> epbs) - (blkid >> epbs) + 1;
+			break;
+		}
+		if (err) {
+			txh->txh_tx->tx_err = err;
+			break;
+		}
+		if (new_blkid > lastblk) {
+			skipped += (lastblk >> epbs) - (blkid >> epbs) + 1;
+			break;
+		}
+
+		if (new_blkid > blkid) {
+			ASSERT((new_blkid >> epbs) > (blkid >> epbs));
+			skipped += (new_blkid >> epbs) - (blkid >> epbs) - 1;
+			nblks -= new_blkid - blkid;
+			blkid = new_blkid;
+		}
+		blkoff = P2PHASE(blkid, epb);
+		tochk = MIN(epb - blkoff, nblks);
+
+		err = dbuf_hold_impl(dn, 1, blkid >> epbs, FALSE, FTAG, &dbuf);
+		if (err) {
+			txh->txh_tx->tx_err = err;
+			break;
+		}
+
+		txh->txh_memory_tohold += dbuf->db.db_size;
+
+		/*
+		 * We don't check memory_tohold against DMU_MAX_ACCESS because
+		 * memory_tohold is an over-estimation (especially the >L1
+		 * indirect blocks), so it could fail.  Callers should have
+		 * already verified that they will not be holding too much
+		 * memory.
+		 */
+
+		err = dbuf_read(dbuf, NULL, DB_RF_HAVESTRUCT | DB_RF_CANFAIL);
+		if (err != 0) {
+			txh->txh_tx->tx_err = err;
+			dbuf_rele(dbuf, FTAG);
+			break;
+		}
+
+		bp = dbuf->db.db_data;
+		bp += blkoff;
+
+		for (i = 0; i < tochk; i++) {
+			if (dsl_dataset_block_freeable(ds, &bp[i],
+			    bp[i].blk_birth)) {
+				dprintf_bp(&bp[i], "can free old%s", "");
+				space += bp_get_dsize(spa, &bp[i]);
+			}
+			unref += BP_GET_ASIZE(bp);
+		}
+		dbuf_rele(dbuf, FTAG);
+
+		blkid += tochk;
+		nblks -= tochk;
+	}
+	rw_exit(&dn->dn_struct_rwlock);
+
+	/* account for new level 1 indirect blocks that might show up */
+	if (skipped > 0) {
+		txh->txh_fudge += skipped << dn->dn_indblkshift;
+		skipped = MIN(skipped, DMU_MAX_DELETEBLKCNT >> epbs);
+		txh->txh_memory_tohold += skipped << dn->dn_indblkshift;
+	}
+	txh->txh_space_tofree += space;
+	txh->txh_space_tounref += unref;
+}
+
+void
+dmu_tx_hold_free(dmu_tx_t *tx, uint64_t object, uint64_t off, uint64_t len)
+{
+	dmu_tx_hold_t *txh;
+	dnode_t *dn;
+	uint64_t start, end, i;
+	int err, shift;
+	zio_t *zio;
+
+	ASSERT(tx->tx_txg == 0);
+
+	txh = dmu_tx_hold_object_impl(tx, tx->tx_objset,
+	    object, THT_FREE, off, len);
+	if (txh == NULL)
+		return;
+	dn = txh->txh_dnode;
+
+	/* first block */
+	if (off != 0)
+		dmu_tx_count_write(txh, off, 1);
+	/* last block */
+	if (len != DMU_OBJECT_END)
+		dmu_tx_count_write(txh, off+len, 1);
+
+	dmu_tx_count_dnode(txh);
+
+	if (off >= (dn->dn_maxblkid+1) * dn->dn_datablksz)
+		return;
+	if (len == DMU_OBJECT_END)
+		len = (dn->dn_maxblkid+1) * dn->dn_datablksz - off;
+
+	/*
+	 * For i/o error checking, read the first and last level-0
+	 * blocks, and all the level-1 blocks.  The above count_write's
+	 * have already taken care of the level-0 blocks.
+	 */
+	if (dn->dn_nlevels > 1) {
+		shift = dn->dn_datablkshift + dn->dn_indblkshift -
+		    SPA_BLKPTRSHIFT;
+		start = off >> shift;
+		end = dn->dn_datablkshift ? ((off+len) >> shift) : 0;
+
+		zio = zio_root(tx->tx_pool->dp_spa,
+		    NULL, NULL, ZIO_FLAG_CANFAIL);
+		for (i = start; i <= end; i++) {
+			uint64_t ibyte = i << shift;
+			err = dnode_next_offset(dn, 0, &ibyte, 2, 1, 0);
+			i = ibyte >> shift;
+			if (err == ESRCH)
+				break;
+			if (err) {
+				tx->tx_err = err;
+				return;
+			}
+
+			err = dmu_tx_check_ioerr(zio, dn, 1, i);
+			if (err) {
+				tx->tx_err = err;
+				return;
+			}
+		}
+		err = zio_wait(zio);
+		if (err) {
+			tx->tx_err = err;
+			return;
+		}
+	}
+
+	dmu_tx_count_free(txh, off, len);
+}
+
+void
+dmu_tx_hold_zap(dmu_tx_t *tx, uint64_t object, int add, const char *name)
+{
+	dmu_tx_hold_t *txh;
+	dnode_t *dn;
+	uint64_t nblocks;
+	int epbs, err;
+
+	ASSERT(tx->tx_txg == 0);
+
+	txh = dmu_tx_hold_object_impl(tx, tx->tx_objset,
+	    object, THT_ZAP, add, (uintptr_t)name);
+	if (txh == NULL)
+		return;
+	dn = txh->txh_dnode;
+
+	dmu_tx_count_dnode(txh);
+
+	if (dn == NULL) {
+		/*
+		 * We will be able to fit a new object's entries into one leaf
+		 * block.  So there will be at most 2 blocks total,
+		 * including the header block.
+		 */
+		dmu_tx_count_write(txh, 0, 2 << fzap_default_block_shift);
+		return;
+	}
+
+	ASSERT3P(dmu_ot[dn->dn_type].ot_byteswap, ==, zap_byteswap);
+
+	if (dn->dn_maxblkid == 0 && !add) {
+		/*
+		 * If there is only one block  (i.e. this is a micro-zap)
+		 * and we are not adding anything, the accounting is simple.
+		 */
+		err = dmu_tx_check_ioerr(NULL, dn, 0, 0);
+		if (err) {
+			tx->tx_err = err;
+			return;
+		}
+
+		/*
+		 * Use max block size here, since we don't know how much
+		 * the size will change between now and the dbuf dirty call.
+		 */
+		if (dsl_dataset_block_freeable(dn->dn_objset->os_dsl_dataset,
+		    &dn->dn_phys->dn_blkptr[0],
+		    dn->dn_phys->dn_blkptr[0].blk_birth)) {
+			txh->txh_space_tooverwrite += SPA_MAXBLOCKSIZE;
+		} else {
+			txh->txh_space_towrite += SPA_MAXBLOCKSIZE;
+		}
+		if (dn->dn_phys->dn_blkptr[0].blk_birth)
+			txh->txh_space_tounref += SPA_MAXBLOCKSIZE;
+		return;
+	}
+
+	if (dn->dn_maxblkid > 0 && name) {
+		/*
+		 * access the name in this fat-zap so that we'll check
+		 * for i/o errors to the leaf blocks, etc.
+		 */
+		err = zap_lookup(dn->dn_objset, dn->dn_object, name,
+		    8, 0, NULL);
+		if (err == EIO) {
+			tx->tx_err = err;
+			return;
+		}
+	}
+
+	err = zap_count_write(dn->dn_objset, dn->dn_object, name, add,
+	    &txh->txh_space_towrite, &txh->txh_space_tooverwrite);
+
+	/*
+	 * If the modified blocks are scattered to the four winds,
+	 * we'll have to modify an indirect twig for each.
+	 */
+	epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
+	for (nblocks = dn->dn_maxblkid >> epbs; nblocks != 0; nblocks >>= epbs)
+		if (dn->dn_objset->os_dsl_dataset->ds_phys->ds_prev_snap_obj)
+			txh->txh_space_towrite += 3 << dn->dn_indblkshift;
+		else
+			txh->txh_space_tooverwrite += 3 << dn->dn_indblkshift;
+}
+
+void
+dmu_tx_hold_bonus(dmu_tx_t *tx, uint64_t object)
+{
+	dmu_tx_hold_t *txh;
+
+	ASSERT(tx->tx_txg == 0);
+
+	txh = dmu_tx_hold_object_impl(tx, tx->tx_objset,
+	    object, THT_BONUS, 0, 0);
+	if (txh)
+		dmu_tx_count_dnode(txh);
+}
+
+void
+dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space)
+{
+	dmu_tx_hold_t *txh;
+	ASSERT(tx->tx_txg == 0);
+
+	txh = dmu_tx_hold_object_impl(tx, tx->tx_objset,
+	    DMU_NEW_OBJECT, THT_SPACE, space, 0);
+
+	txh->txh_space_towrite += space;
+}
+
+int
+dmu_tx_holds(dmu_tx_t *tx, uint64_t object)
+{
+	dmu_tx_hold_t *txh;
+	int holds = 0;
+
+	/*
+	 * By asserting that the tx is assigned, we're counting the
+	 * number of dn_tx_holds, which is the same as the number of
+	 * dn_holds.  Otherwise, we'd be counting dn_holds, but
+	 * dn_tx_holds could be 0.
+	 */
+	ASSERT(tx->tx_txg != 0);
+
+	/* if (tx->tx_anyobj == TRUE) */
+		/* return (0); */
+
+	for (txh = list_head(&tx->tx_holds); txh;
+	    txh = list_next(&tx->tx_holds, txh)) {
+		if (txh->txh_dnode && txh->txh_dnode->dn_object == object)
+			holds++;
+	}
+
+	return (holds);
+}
+
+#ifdef ZFS_DEBUG
+void
+dmu_tx_dirty_buf(dmu_tx_t *tx, dmu_buf_impl_t *db)
+{
+	dmu_tx_hold_t *txh;
+	int match_object = FALSE, match_offset = FALSE;
+	dnode_t *dn;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	ASSERT(tx->tx_txg != 0);
+	ASSERT(tx->tx_objset == NULL || dn->dn_objset == tx->tx_objset);
+	ASSERT3U(dn->dn_object, ==, db->db.db_object);
+
+	if (tx->tx_anyobj) {
+		DB_DNODE_EXIT(db);
+		return;
+	}
+
+	/* XXX No checking on the meta dnode for now */
+	if (db->db.db_object == DMU_META_DNODE_OBJECT) {
+		DB_DNODE_EXIT(db);
+		return;
+	}
+
+	for (txh = list_head(&tx->tx_holds); txh;
+	    txh = list_next(&tx->tx_holds, txh)) {
+		ASSERT(dn == NULL || dn->dn_assigned_txg == tx->tx_txg);
+		if (txh->txh_dnode == dn && txh->txh_type != THT_NEWOBJECT)
+			match_object = TRUE;
+		if (txh->txh_dnode == NULL || txh->txh_dnode == dn) {
+			int datablkshift = dn->dn_datablkshift ?
+			    dn->dn_datablkshift : SPA_MAXBLOCKSHIFT;
+			int epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
+			int shift = datablkshift + epbs * db->db_level;
+			uint64_t beginblk = shift >= 64 ? 0 :
+			    (txh->txh_arg1 >> shift);
+			uint64_t endblk = shift >= 64 ? 0 :
+			    ((txh->txh_arg1 + txh->txh_arg2 - 1) >> shift);
+			uint64_t blkid = db->db_blkid;
+
+			/* XXX txh_arg2 better not be zero... */
+
+			dprintf("found txh type %x beginblk=%llx endblk=%llx\n",
+			    txh->txh_type, beginblk, endblk);
+
+			switch (txh->txh_type) {
+			case THT_WRITE:
+				if (blkid >= beginblk && blkid <= endblk)
+					match_offset = TRUE;
+				/*
+				 * We will let this hold work for the bonus
+				 * or spill buffer so that we don't need to
+				 * hold it when creating a new object.
+				 */
+				if (blkid == DMU_BONUS_BLKID ||
+				    blkid == DMU_SPILL_BLKID)
+					match_offset = TRUE;
+				/*
+				 * They might have to increase nlevels,
+				 * thus dirtying the new TLIBs.  Or the
+				 * might have to change the block size,
+				 * thus dirying the new lvl=0 blk=0.
+				 */
+				if (blkid == 0)
+					match_offset = TRUE;
+				break;
+			case THT_FREE:
+				/*
+				 * We will dirty all the level 1 blocks in
+				 * the free range and perhaps the first and
+				 * last level 0 block.
+				 */
+				if (blkid >= beginblk && (blkid <= endblk ||
+				    txh->txh_arg2 == DMU_OBJECT_END))
+					match_offset = TRUE;
+				break;
+			case THT_SPILL:
+				if (blkid == DMU_SPILL_BLKID)
+					match_offset = TRUE;
+				break;
+			case THT_BONUS:
+				if (blkid == DMU_BONUS_BLKID)
+					match_offset = TRUE;
+				break;
+			case THT_ZAP:
+				match_offset = TRUE;
+				break;
+			case THT_NEWOBJECT:
+				match_object = TRUE;
+				break;
+			default:
+				ASSERT(!"bad txh_type");
+			}
+		}
+		if (match_object && match_offset) {
+			DB_DNODE_EXIT(db);
+			return;
+		}
+	}
+	DB_DNODE_EXIT(db);
+	panic("dirtying dbuf obj=%llx lvl=%u blkid=%llx but not tx_held\n",
+	    (u_longlong_t)db->db.db_object, db->db_level,
+	    (u_longlong_t)db->db_blkid);
+}
+#endif
+
+static int
+dmu_tx_try_assign(dmu_tx_t *tx, uint64_t txg_how)
+{
+	dmu_tx_hold_t *txh;
+	spa_t *spa = tx->tx_pool->dp_spa;
+	uint64_t memory, asize, fsize, usize;
+	uint64_t towrite, tofree, tooverwrite, tounref, tohold, fudge;
+
+	ASSERT3U(tx->tx_txg, ==, 0);
+
+	if (tx->tx_err)
+		return (tx->tx_err);
+
+	if (spa_suspended(spa)) {
+		/*
+		 * If the user has indicated a blocking failure mode
+		 * then return ERESTART which will block in dmu_tx_wait().
+		 * Otherwise, return EIO so that an error can get
+		 * propagated back to the VOP calls.
+		 *
+		 * Note that we always honor the txg_how flag regardless
+		 * of the failuremode setting.
+		 */
+		if (spa_get_failmode(spa) == ZIO_FAILURE_MODE_CONTINUE &&
+		    txg_how != TXG_WAIT)
+			return (EIO);
+
+		return (ERESTART);
+	}
+
+	tx->tx_txg = txg_hold_open(tx->tx_pool, &tx->tx_txgh);
+	tx->tx_needassign_txh = NULL;
+
+	/*
+	 * NB: No error returns are allowed after txg_hold_open, but
+	 * before processing the dnode holds, due to the
+	 * dmu_tx_unassign() logic.
+	 */
+
+	towrite = tofree = tooverwrite = tounref = tohold = fudge = 0;
+	for (txh = list_head(&tx->tx_holds); txh;
+	    txh = list_next(&tx->tx_holds, txh)) {
+		dnode_t *dn = txh->txh_dnode;
+		if (dn != NULL) {
+			mutex_enter(&dn->dn_mtx);
+			if (dn->dn_assigned_txg == tx->tx_txg - 1) {
+				mutex_exit(&dn->dn_mtx);
+				tx->tx_needassign_txh = txh;
+				return (ERESTART);
+			}
+			if (dn->dn_assigned_txg == 0)
+				dn->dn_assigned_txg = tx->tx_txg;
+			ASSERT3U(dn->dn_assigned_txg, ==, tx->tx_txg);
+			(void) refcount_add(&dn->dn_tx_holds, tx);
+			mutex_exit(&dn->dn_mtx);
+		}
+		towrite += txh->txh_space_towrite;
+		tofree += txh->txh_space_tofree;
+		tooverwrite += txh->txh_space_tooverwrite;
+		tounref += txh->txh_space_tounref;
+		tohold += txh->txh_memory_tohold;
+		fudge += txh->txh_fudge;
+	}
+
+	/*
+	 * NB: This check must be after we've held the dnodes, so that
+	 * the dmu_tx_unassign() logic will work properly
+	 */
+	if (txg_how >= TXG_INITIAL && txg_how != tx->tx_txg)
+		return (ERESTART);
+
+	/*
+	 * If a snapshot has been taken since we made our estimates,
+	 * assume that we won't be able to free or overwrite anything.
+	 */
+	if (tx->tx_objset &&
+	    dsl_dataset_prev_snap_txg(tx->tx_objset->os_dsl_dataset) >
+	    tx->tx_lastsnap_txg) {
+		towrite += tooverwrite;
+		tooverwrite = tofree = 0;
+	}
+
+	/* needed allocation: worst-case estimate of write space */
+	asize = spa_get_asize(tx->tx_pool->dp_spa, towrite + tooverwrite);
+	/* freed space estimate: worst-case overwrite + free estimate */
+	fsize = spa_get_asize(tx->tx_pool->dp_spa, tooverwrite) + tofree;
+	/* convert unrefd space to worst-case estimate */
+	usize = spa_get_asize(tx->tx_pool->dp_spa, tounref);
+	/* calculate memory footprint estimate */
+	memory = towrite + tooverwrite + tohold;
+
+#ifdef ZFS_DEBUG
+	/*
+	 * Add in 'tohold' to account for our dirty holds on this memory
+	 * XXX - the "fudge" factor is to account for skipped blocks that
+	 * we missed because dnode_next_offset() misses in-core-only blocks.
+	 */
+	tx->tx_space_towrite = asize +
+	    spa_get_asize(tx->tx_pool->dp_spa, tohold + fudge);
+	tx->tx_space_tofree = tofree;
+	tx->tx_space_tooverwrite = tooverwrite;
+	tx->tx_space_tounref = tounref;
+#endif
+
+	if (tx->tx_dir && asize != 0) {
+		int err = dsl_dir_tempreserve_space(tx->tx_dir, memory,
+		    asize, fsize, usize, &tx->tx_tempreserve_cookie, tx);
+		if (err)
+			return (err);
+	}
+
+	return (0);
+}
+
+static void
+dmu_tx_unassign(dmu_tx_t *tx)
+{
+	dmu_tx_hold_t *txh;
+
+	if (tx->tx_txg == 0)
+		return;
+
+	txg_rele_to_quiesce(&tx->tx_txgh);
+
+	for (txh = list_head(&tx->tx_holds); txh != tx->tx_needassign_txh;
+	    txh = list_next(&tx->tx_holds, txh)) {
+		dnode_t *dn = txh->txh_dnode;
+
+		if (dn == NULL)
+			continue;
+		mutex_enter(&dn->dn_mtx);
+		ASSERT3U(dn->dn_assigned_txg, ==, tx->tx_txg);
+
+		if (refcount_remove(&dn->dn_tx_holds, tx) == 0) {
+			dn->dn_assigned_txg = 0;
+			cv_broadcast(&dn->dn_notxholds);
+		}
+		mutex_exit(&dn->dn_mtx);
+	}
+
+	txg_rele_to_sync(&tx->tx_txgh);
+
+	tx->tx_lasttried_txg = tx->tx_txg;
+	tx->tx_txg = 0;
+}
+
+/*
+ * Assign tx to a transaction group.  txg_how can be one of:
+ *
+ * (1)	TXG_WAIT.  If the current open txg is full, waits until there's
+ *	a new one.  This should be used when you're not holding locks.
+ *	If will only fail if we're truly out of space (or over quota).
+ *
+ * (2)	TXG_NOWAIT.  If we can't assign into the current open txg without
+ *	blocking, returns immediately with ERESTART.  This should be used
+ *	whenever you're holding locks.  On an ERESTART error, the caller
+ *	should drop locks, do a dmu_tx_wait(tx), and try again.
+ *
+ * (3)	A specific txg.  Use this if you need to ensure that multiple
+ *	transactions all sync in the same txg.  Like TXG_NOWAIT, it
+ *	returns ERESTART if it can't assign you into the requested txg.
+ */
+int
+dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how)
+{
+	int err;
+
+	ASSERT(tx->tx_txg == 0);
+	ASSERT(txg_how != 0);
+	ASSERT(!dsl_pool_sync_context(tx->tx_pool));
+
+	while ((err = dmu_tx_try_assign(tx, txg_how)) != 0) {
+		dmu_tx_unassign(tx);
+
+		if (err != ERESTART || txg_how != TXG_WAIT)
+			return (err);
+
+		dmu_tx_wait(tx);
+	}
+
+	txg_rele_to_quiesce(&tx->tx_txgh);
+
+	return (0);
+}
+
+void
+dmu_tx_wait(dmu_tx_t *tx)
+{
+	spa_t *spa = tx->tx_pool->dp_spa;
+
+	ASSERT(tx->tx_txg == 0);
+
+	/*
+	 * It's possible that the pool has become active after this thread
+	 * has tried to obtain a tx. If that's the case then his
+	 * tx_lasttried_txg would not have been assigned.
+	 */
+	if (spa_suspended(spa) || tx->tx_lasttried_txg == 0) {
+		txg_wait_synced(tx->tx_pool, spa_last_synced_txg(spa) + 1);
+	} else if (tx->tx_needassign_txh) {
+		dnode_t *dn = tx->tx_needassign_txh->txh_dnode;
+
+		mutex_enter(&dn->dn_mtx);
+		while (dn->dn_assigned_txg == tx->tx_lasttried_txg - 1)
+			cv_wait(&dn->dn_notxholds, &dn->dn_mtx);
+		mutex_exit(&dn->dn_mtx);
+		tx->tx_needassign_txh = NULL;
+	} else {
+		txg_wait_open(tx->tx_pool, tx->tx_lasttried_txg + 1);
+	}
+}
+
+void
+dmu_tx_willuse_space(dmu_tx_t *tx, int64_t delta)
+{
+#ifdef ZFS_DEBUG
+	if (tx->tx_dir == NULL || delta == 0)
+		return;
+
+	if (delta > 0) {
+		ASSERT3U(refcount_count(&tx->tx_space_written) + delta, <=,
+		    tx->tx_space_towrite);
+		(void) refcount_add_many(&tx->tx_space_written, delta, NULL);
+	} else {
+		(void) refcount_add_many(&tx->tx_space_freed, -delta, NULL);
+	}
+#endif
+}
+
+void
+dmu_tx_commit(dmu_tx_t *tx)
+{
+	dmu_tx_hold_t *txh;
+
+	ASSERT(tx->tx_txg != 0);
+
+	while (txh = list_head(&tx->tx_holds)) {
+		dnode_t *dn = txh->txh_dnode;
+
+		list_remove(&tx->tx_holds, txh);
+		kmem_free(txh, sizeof (dmu_tx_hold_t));
+		if (dn == NULL)
+			continue;
+		mutex_enter(&dn->dn_mtx);
+		ASSERT3U(dn->dn_assigned_txg, ==, tx->tx_txg);
+
+		if (refcount_remove(&dn->dn_tx_holds, tx) == 0) {
+			dn->dn_assigned_txg = 0;
+			cv_broadcast(&dn->dn_notxholds);
+		}
+		mutex_exit(&dn->dn_mtx);
+		dnode_rele(dn, tx);
+	}
+
+	if (tx->tx_tempreserve_cookie)
+		dsl_dir_tempreserve_clear(tx->tx_tempreserve_cookie, tx);
+
+	if (!list_is_empty(&tx->tx_callbacks))
+		txg_register_callbacks(&tx->tx_txgh, &tx->tx_callbacks);
+
+	if (tx->tx_anyobj == FALSE)
+		txg_rele_to_sync(&tx->tx_txgh);
+
+	list_destroy(&tx->tx_callbacks);
+	list_destroy(&tx->tx_holds);
+#ifdef ZFS_DEBUG
+	dprintf("towrite=%llu written=%llu tofree=%llu freed=%llu\n",
+	    tx->tx_space_towrite, refcount_count(&tx->tx_space_written),
+	    tx->tx_space_tofree, refcount_count(&tx->tx_space_freed));
+	refcount_destroy_many(&tx->tx_space_written,
+	    refcount_count(&tx->tx_space_written));
+	refcount_destroy_many(&tx->tx_space_freed,
+	    refcount_count(&tx->tx_space_freed));
+#endif
+	kmem_free(tx, sizeof (dmu_tx_t));
+}
+
+void
+dmu_tx_abort(dmu_tx_t *tx)
+{
+	dmu_tx_hold_t *txh;
+
+	ASSERT(tx->tx_txg == 0);
+
+	while (txh = list_head(&tx->tx_holds)) {
+		dnode_t *dn = txh->txh_dnode;
+
+		list_remove(&tx->tx_holds, txh);
+		kmem_free(txh, sizeof (dmu_tx_hold_t));
+		if (dn != NULL)
+			dnode_rele(dn, tx);
+	}
+
+	/*
+	 * Call any registered callbacks with an error code.
+	 */
+	if (!list_is_empty(&tx->tx_callbacks))
+		dmu_tx_do_callbacks(&tx->tx_callbacks, ECANCELED);
+
+	list_destroy(&tx->tx_callbacks);
+	list_destroy(&tx->tx_holds);
+#ifdef ZFS_DEBUG
+	refcount_destroy_many(&tx->tx_space_written,
+	    refcount_count(&tx->tx_space_written));
+	refcount_destroy_many(&tx->tx_space_freed,
+	    refcount_count(&tx->tx_space_freed));
+#endif
+	kmem_free(tx, sizeof (dmu_tx_t));
+}
+
+uint64_t
+dmu_tx_get_txg(dmu_tx_t *tx)
+{
+	ASSERT(tx->tx_txg != 0);
+	return (tx->tx_txg);
+}
+
+void
+dmu_tx_callback_register(dmu_tx_t *tx, dmu_tx_callback_func_t *func, void *data)
+{
+	dmu_tx_callback_t *dcb;
+
+	dcb = kmem_alloc(sizeof (dmu_tx_callback_t), KM_SLEEP);
+
+	dcb->dcb_func = func;
+	dcb->dcb_data = data;
+
+	list_insert_tail(&tx->tx_callbacks, dcb);
+}
+
+/*
+ * Call all the commit callbacks on a list, with a given error code.
+ */
+void
+dmu_tx_do_callbacks(list_t *cb_list, int error)
+{
+	dmu_tx_callback_t *dcb;
+
+	while (dcb = list_head(cb_list)) {
+		list_remove(cb_list, dcb);
+		dcb->dcb_func(dcb->dcb_data, error);
+		kmem_free(dcb, sizeof (dmu_tx_callback_t));
+	}
+}
+
+/*
+ * Interface to hold a bunch of attributes.
+ * used for creating new files.
+ * attrsize is the total size of all attributes
+ * to be added during object creation
+ *
+ * For updating/adding a single attribute dmu_tx_hold_sa() should be used.
+ */
+
+/*
+ * hold necessary attribute name for attribute registration.
+ * should be a very rare case where this is needed.  If it does
+ * happen it would only happen on the first write to the file system.
+ */
+static void
+dmu_tx_sa_registration_hold(sa_os_t *sa, dmu_tx_t *tx)
+{
+	int i;
+
+	if (!sa->sa_need_attr_registration)
+		return;
+
+	for (i = 0; i != sa->sa_num_attrs; i++) {
+		if (!sa->sa_attr_table[i].sa_registered) {
+			if (sa->sa_reg_attr_obj)
+				dmu_tx_hold_zap(tx, sa->sa_reg_attr_obj,
+				    B_TRUE, sa->sa_attr_table[i].sa_name);
+			else
+				dmu_tx_hold_zap(tx, DMU_NEW_OBJECT,
+				    B_TRUE, sa->sa_attr_table[i].sa_name);
+		}
+	}
+}
+
+
+void
+dmu_tx_hold_spill(dmu_tx_t *tx, uint64_t object)
+{
+	dnode_t *dn;
+	dmu_tx_hold_t *txh;
+	blkptr_t *bp;
+
+	txh = dmu_tx_hold_object_impl(tx, tx->tx_objset, object,
+	    THT_SPILL, 0, 0);
+
+	dn = txh->txh_dnode;
+
+	if (dn == NULL)
+		return;
+
+	/* If blkptr doesn't exist then add space to towrite */
+	bp = &dn->dn_phys->dn_spill;
+	if (BP_IS_HOLE(bp)) {
+		txh->txh_space_towrite += SPA_MAXBLOCKSIZE;
+		txh->txh_space_tounref = 0;
+	} else {
+		if (dsl_dataset_block_freeable(dn->dn_objset->os_dsl_dataset,
+		    bp, bp->blk_birth))
+			txh->txh_space_tooverwrite += SPA_MAXBLOCKSIZE;
+		else
+			txh->txh_space_towrite += SPA_MAXBLOCKSIZE;
+		if (bp->blk_birth)
+			txh->txh_space_tounref += SPA_MAXBLOCKSIZE;
+	}
+}
+
+void
+dmu_tx_hold_sa_create(dmu_tx_t *tx, int attrsize)
+{
+	sa_os_t *sa = tx->tx_objset->os_sa;
+
+	dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
+
+	if (tx->tx_objset->os_sa->sa_master_obj == 0)
+		return;
+
+	if (tx->tx_objset->os_sa->sa_layout_attr_obj)
+		dmu_tx_hold_zap(tx, sa->sa_layout_attr_obj, B_TRUE, NULL);
+	else {
+		dmu_tx_hold_zap(tx, sa->sa_master_obj, B_TRUE, SA_LAYOUTS);
+		dmu_tx_hold_zap(tx, sa->sa_master_obj, B_TRUE, SA_REGISTRY);
+		dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, B_TRUE, NULL);
+		dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, B_TRUE, NULL);
+	}
+
+	dmu_tx_sa_registration_hold(sa, tx);
+
+	if (attrsize <= DN_MAX_BONUSLEN && !sa->sa_force_spill)
+		return;
+
+	(void) dmu_tx_hold_object_impl(tx, tx->tx_objset, DMU_NEW_OBJECT,
+	    THT_SPILL, 0, 0);
+}
+
+/*
+ * Hold SA attribute
+ *
+ * dmu_tx_hold_sa(dmu_tx_t *tx, sa_handle_t *, attribute, add, size)
+ *
+ * variable_size is the total size of all variable sized attributes
+ * passed to this function.  It is not the total size of all
+ * variable size attributes that *may* exist on this object.
+ */
+void
+dmu_tx_hold_sa(dmu_tx_t *tx, sa_handle_t *hdl, boolean_t may_grow)
+{
+	uint64_t object;
+	sa_os_t *sa = tx->tx_objset->os_sa;
+
+	ASSERT(hdl != NULL);
+
+	object = sa_handle_object(hdl);
+
+	dmu_tx_hold_bonus(tx, object);
+
+	if (tx->tx_objset->os_sa->sa_master_obj == 0)
+		return;
+
+	if (tx->tx_objset->os_sa->sa_reg_attr_obj == 0 ||
+	    tx->tx_objset->os_sa->sa_layout_attr_obj == 0) {
+		dmu_tx_hold_zap(tx, sa->sa_master_obj, B_TRUE, SA_LAYOUTS);
+		dmu_tx_hold_zap(tx, sa->sa_master_obj, B_TRUE, SA_REGISTRY);
+		dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, B_TRUE, NULL);
+		dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, B_TRUE, NULL);
+	}
+
+	dmu_tx_sa_registration_hold(sa, tx);
+
+	if (may_grow && tx->tx_objset->os_sa->sa_layout_attr_obj)
+		dmu_tx_hold_zap(tx, sa->sa_layout_attr_obj, B_TRUE, NULL);
+
+	if (sa->sa_force_spill || may_grow || hdl->sa_spill) {
+		ASSERT(tx->tx_txg == 0);
+		dmu_tx_hold_spill(tx, object);
+	} else {
+		dmu_buf_impl_t *db = (dmu_buf_impl_t *)hdl->sa_bonus;
+		dnode_t *dn;
+
+		DB_DNODE_ENTER(db);
+		dn = DB_DNODE(db);
+		if (dn->dn_have_spill) {
+			ASSERT(tx->tx_txg == 0);
+			dmu_tx_hold_spill(tx, object);
+		}
+		DB_DNODE_EXIT(db);
+	}
+}
diff --git a/uts/common/fs/zfs/dmu_zfetch.c b/uts/common/fs/zfs/dmu_zfetch.c
new file mode 100644
index 000000000000..37037c30f623
--- /dev/null
+++ b/uts/common/fs/zfs/dmu_zfetch.c
@@ -0,0 +1,724 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/dnode.h>
+#include <sys/dmu_objset.h>
+#include <sys/dmu_zfetch.h>
+#include <sys/dmu.h>
+#include <sys/dbuf.h>
+#include <sys/kstat.h>
+
+/*
+ * I'm against tune-ables, but these should probably exist as tweakable globals
+ * until we can get this working the way we want it to.
+ */
+
+int zfs_prefetch_disable = 0;
+
+/* max # of streams per zfetch */
+uint32_t	zfetch_max_streams = 8;
+/* min time before stream reclaim */
+uint32_t	zfetch_min_sec_reap = 2;
+/* max number of blocks to fetch at a time */
+uint32_t	zfetch_block_cap = 256;
+/* number of bytes in a array_read at which we stop prefetching (1Mb) */
+uint64_t	zfetch_array_rd_sz = 1024 * 1024;
+
+/* forward decls for static routines */
+static int		dmu_zfetch_colinear(zfetch_t *, zstream_t *);
+static void		dmu_zfetch_dofetch(zfetch_t *, zstream_t *);
+static uint64_t		dmu_zfetch_fetch(dnode_t *, uint64_t, uint64_t);
+static uint64_t		dmu_zfetch_fetchsz(dnode_t *, uint64_t, uint64_t);
+static int		dmu_zfetch_find(zfetch_t *, zstream_t *, int);
+static int		dmu_zfetch_stream_insert(zfetch_t *, zstream_t *);
+static zstream_t	*dmu_zfetch_stream_reclaim(zfetch_t *);
+static void		dmu_zfetch_stream_remove(zfetch_t *, zstream_t *);
+static int		dmu_zfetch_streams_equal(zstream_t *, zstream_t *);
+
+typedef struct zfetch_stats {
+	kstat_named_t zfetchstat_hits;
+	kstat_named_t zfetchstat_misses;
+	kstat_named_t zfetchstat_colinear_hits;
+	kstat_named_t zfetchstat_colinear_misses;
+	kstat_named_t zfetchstat_stride_hits;
+	kstat_named_t zfetchstat_stride_misses;
+	kstat_named_t zfetchstat_reclaim_successes;
+	kstat_named_t zfetchstat_reclaim_failures;
+	kstat_named_t zfetchstat_stream_resets;
+	kstat_named_t zfetchstat_stream_noresets;
+	kstat_named_t zfetchstat_bogus_streams;
+} zfetch_stats_t;
+
+static zfetch_stats_t zfetch_stats = {
+	{ "hits",			KSTAT_DATA_UINT64 },
+	{ "misses",			KSTAT_DATA_UINT64 },
+	{ "colinear_hits",		KSTAT_DATA_UINT64 },
+	{ "colinear_misses",		KSTAT_DATA_UINT64 },
+	{ "stride_hits",		KSTAT_DATA_UINT64 },
+	{ "stride_misses",		KSTAT_DATA_UINT64 },
+	{ "reclaim_successes",		KSTAT_DATA_UINT64 },
+	{ "reclaim_failures",		KSTAT_DATA_UINT64 },
+	{ "streams_resets",		KSTAT_DATA_UINT64 },
+	{ "streams_noresets",		KSTAT_DATA_UINT64 },
+	{ "bogus_streams",		KSTAT_DATA_UINT64 },
+};
+
+#define	ZFETCHSTAT_INCR(stat, val) \
+	atomic_add_64(&zfetch_stats.stat.value.ui64, (val));
+
+#define	ZFETCHSTAT_BUMP(stat)		ZFETCHSTAT_INCR(stat, 1);
+
+kstat_t		*zfetch_ksp;
+
+/*
+ * Given a zfetch structure and a zstream structure, determine whether the
+ * blocks to be read are part of a co-linear pair of existing prefetch
+ * streams.  If a set is found, coalesce the streams, removing one, and
+ * configure the prefetch so it looks for a strided access pattern.
+ *
+ * In other words: if we find two sequential access streams that are
+ * the same length and distance N appart, and this read is N from the
+ * last stream, then we are probably in a strided access pattern.  So
+ * combine the two sequential streams into a single strided stream.
+ *
+ * If no co-linear streams are found, return NULL.
+ */
+static int
+dmu_zfetch_colinear(zfetch_t *zf, zstream_t *zh)
+{
+	zstream_t	*z_walk;
+	zstream_t	*z_comp;
+
+	if (! rw_tryenter(&zf->zf_rwlock, RW_WRITER))
+		return (0);
+
+	if (zh == NULL) {
+		rw_exit(&zf->zf_rwlock);
+		return (0);
+	}
+
+	for (z_walk = list_head(&zf->zf_stream); z_walk;
+	    z_walk = list_next(&zf->zf_stream, z_walk)) {
+		for (z_comp = list_next(&zf->zf_stream, z_walk); z_comp;
+		    z_comp = list_next(&zf->zf_stream, z_comp)) {
+			int64_t		diff;
+
+			if (z_walk->zst_len != z_walk->zst_stride ||
+			    z_comp->zst_len != z_comp->zst_stride) {
+				continue;
+			}
+
+			diff = z_comp->zst_offset - z_walk->zst_offset;
+			if (z_comp->zst_offset + diff == zh->zst_offset) {
+				z_walk->zst_offset = zh->zst_offset;
+				z_walk->zst_direction = diff < 0 ? -1 : 1;
+				z_walk->zst_stride =
+				    diff * z_walk->zst_direction;
+				z_walk->zst_ph_offset =
+				    zh->zst_offset + z_walk->zst_stride;
+				dmu_zfetch_stream_remove(zf, z_comp);
+				mutex_destroy(&z_comp->zst_lock);
+				kmem_free(z_comp, sizeof (zstream_t));
+
+				dmu_zfetch_dofetch(zf, z_walk);
+
+				rw_exit(&zf->zf_rwlock);
+				return (1);
+			}
+
+			diff = z_walk->zst_offset - z_comp->zst_offset;
+			if (z_walk->zst_offset + diff == zh->zst_offset) {
+				z_walk->zst_offset = zh->zst_offset;
+				z_walk->zst_direction = diff < 0 ? -1 : 1;
+				z_walk->zst_stride =
+				    diff * z_walk->zst_direction;
+				z_walk->zst_ph_offset =
+				    zh->zst_offset + z_walk->zst_stride;
+				dmu_zfetch_stream_remove(zf, z_comp);
+				mutex_destroy(&z_comp->zst_lock);
+				kmem_free(z_comp, sizeof (zstream_t));
+
+				dmu_zfetch_dofetch(zf, z_walk);
+
+				rw_exit(&zf->zf_rwlock);
+				return (1);
+			}
+		}
+	}
+
+	rw_exit(&zf->zf_rwlock);
+	return (0);
+}
+
+/*
+ * Given a zstream_t, determine the bounds of the prefetch.  Then call the
+ * routine that actually prefetches the individual blocks.
+ */
+static void
+dmu_zfetch_dofetch(zfetch_t *zf, zstream_t *zs)
+{
+	uint64_t	prefetch_tail;
+	uint64_t	prefetch_limit;
+	uint64_t	prefetch_ofst;
+	uint64_t	prefetch_len;
+	uint64_t	blocks_fetched;
+
+	zs->zst_stride = MAX((int64_t)zs->zst_stride, zs->zst_len);
+	zs->zst_cap = MIN(zfetch_block_cap, 2 * zs->zst_cap);
+
+	prefetch_tail = MAX((int64_t)zs->zst_ph_offset,
+	    (int64_t)(zs->zst_offset + zs->zst_stride));
+	/*
+	 * XXX: use a faster division method?
+	 */
+	prefetch_limit = zs->zst_offset + zs->zst_len +
+	    (zs->zst_cap * zs->zst_stride) / zs->zst_len;
+
+	while (prefetch_tail < prefetch_limit) {
+		prefetch_ofst = zs->zst_offset + zs->zst_direction *
+		    (prefetch_tail - zs->zst_offset);
+
+		prefetch_len = zs->zst_len;
+
+		/*
+		 * Don't prefetch beyond the end of the file, if working
+		 * backwards.
+		 */
+		if ((zs->zst_direction == ZFETCH_BACKWARD) &&
+		    (prefetch_ofst > prefetch_tail)) {
+			prefetch_len += prefetch_ofst;
+			prefetch_ofst = 0;
+		}
+
+		/* don't prefetch more than we're supposed to */
+		if (prefetch_len > zs->zst_len)
+			break;
+
+		blocks_fetched = dmu_zfetch_fetch(zf->zf_dnode,
+		    prefetch_ofst, zs->zst_len);
+
+		prefetch_tail += zs->zst_stride;
+		/* stop if we've run out of stuff to prefetch */
+		if (blocks_fetched < zs->zst_len)
+			break;
+	}
+	zs->zst_ph_offset = prefetch_tail;
+	zs->zst_last = ddi_get_lbolt();
+}
+
+void
+zfetch_init(void)
+{
+
+	zfetch_ksp = kstat_create("zfs", 0, "zfetchstats", "misc",
+	    KSTAT_TYPE_NAMED, sizeof (zfetch_stats) / sizeof (kstat_named_t),
+	    KSTAT_FLAG_VIRTUAL);
+
+	if (zfetch_ksp != NULL) {
+		zfetch_ksp->ks_data = &zfetch_stats;
+		kstat_install(zfetch_ksp);
+	}
+}
+
+void
+zfetch_fini(void)
+{
+	if (zfetch_ksp != NULL) {
+		kstat_delete(zfetch_ksp);
+		zfetch_ksp = NULL;
+	}
+}
+
+/*
+ * This takes a pointer to a zfetch structure and a dnode.  It performs the
+ * necessary setup for the zfetch structure, grokking data from the
+ * associated dnode.
+ */
+void
+dmu_zfetch_init(zfetch_t *zf, dnode_t *dno)
+{
+	if (zf == NULL) {
+		return;
+	}
+
+	zf->zf_dnode = dno;
+	zf->zf_stream_cnt = 0;
+	zf->zf_alloc_fail = 0;
+
+	list_create(&zf->zf_stream, sizeof (zstream_t),
+	    offsetof(zstream_t, zst_node));
+
+	rw_init(&zf->zf_rwlock, NULL, RW_DEFAULT, NULL);
+}
+
+/*
+ * This function computes the actual size, in blocks, that can be prefetched,
+ * and fetches it.
+ */
+static uint64_t
+dmu_zfetch_fetch(dnode_t *dn, uint64_t blkid, uint64_t nblks)
+{
+	uint64_t	fetchsz;
+	uint64_t	i;
+
+	fetchsz = dmu_zfetch_fetchsz(dn, blkid, nblks);
+
+	for (i = 0; i < fetchsz; i++) {
+		dbuf_prefetch(dn, blkid + i);
+	}
+
+	return (fetchsz);
+}
+
+/*
+ * this function returns the number of blocks that would be prefetched, based
+ * upon the supplied dnode, blockid, and nblks.  This is used so that we can
+ * update streams in place, and then prefetch with their old value after the
+ * fact.  This way, we can delay the prefetch, but subsequent accesses to the
+ * stream won't result in the same data being prefetched multiple times.
+ */
+static uint64_t
+dmu_zfetch_fetchsz(dnode_t *dn, uint64_t blkid, uint64_t nblks)
+{
+	uint64_t	fetchsz;
+
+	if (blkid > dn->dn_maxblkid) {
+		return (0);
+	}
+
+	/* compute fetch size */
+	if (blkid + nblks + 1 > dn->dn_maxblkid) {
+		fetchsz = (dn->dn_maxblkid - blkid) + 1;
+		ASSERT(blkid + fetchsz - 1 <= dn->dn_maxblkid);
+	} else {
+		fetchsz = nblks;
+	}
+
+
+	return (fetchsz);
+}
+
+/*
+ * given a zfetch and a zstream structure, see if there is an associated zstream
+ * for this block read.  If so, it starts a prefetch for the stream it
+ * located and returns true, otherwise it returns false
+ */
+static int
+dmu_zfetch_find(zfetch_t *zf, zstream_t *zh, int prefetched)
+{
+	zstream_t	*zs;
+	int64_t		diff;
+	int		reset = !prefetched;
+	int		rc = 0;
+
+	if (zh == NULL)
+		return (0);
+
+	/*
+	 * XXX: This locking strategy is a bit coarse; however, it's impact has
+	 * yet to be tested.  If this turns out to be an issue, it can be
+	 * modified in a number of different ways.
+	 */
+
+	rw_enter(&zf->zf_rwlock, RW_READER);
+top:
+
+	for (zs = list_head(&zf->zf_stream); zs;
+	    zs = list_next(&zf->zf_stream, zs)) {
+
+		/*
+		 * XXX - should this be an assert?
+		 */
+		if (zs->zst_len == 0) {
+			/* bogus stream */
+			ZFETCHSTAT_BUMP(zfetchstat_bogus_streams);
+			continue;
+		}
+
+		/*
+		 * We hit this case when we are in a strided prefetch stream:
+		 * we will read "len" blocks before "striding".
+		 */
+		if (zh->zst_offset >= zs->zst_offset &&
+		    zh->zst_offset < zs->zst_offset + zs->zst_len) {
+			if (prefetched) {
+				/* already fetched */
+				ZFETCHSTAT_BUMP(zfetchstat_stride_hits);
+				rc = 1;
+				goto out;
+			} else {
+				ZFETCHSTAT_BUMP(zfetchstat_stride_misses);
+			}
+		}
+
+		/*
+		 * This is the forward sequential read case: we increment
+		 * len by one each time we hit here, so we will enter this
+		 * case on every read.
+		 */
+		if (zh->zst_offset == zs->zst_offset + zs->zst_len) {
+
+			reset = !prefetched && zs->zst_len > 1;
+
+			mutex_enter(&zs->zst_lock);
+
+			if (zh->zst_offset != zs->zst_offset + zs->zst_len) {
+				mutex_exit(&zs->zst_lock);
+				goto top;
+			}
+			zs->zst_len += zh->zst_len;
+			diff = zs->zst_len - zfetch_block_cap;
+			if (diff > 0) {
+				zs->zst_offset += diff;
+				zs->zst_len = zs->zst_len > diff ?
+				    zs->zst_len - diff : 0;
+			}
+			zs->zst_direction = ZFETCH_FORWARD;
+
+			break;
+
+		/*
+		 * Same as above, but reading backwards through the file.
+		 */
+		} else if (zh->zst_offset == zs->zst_offset - zh->zst_len) {
+			/* backwards sequential access */
+
+			reset = !prefetched && zs->zst_len > 1;
+
+			mutex_enter(&zs->zst_lock);
+
+			if (zh->zst_offset != zs->zst_offset - zh->zst_len) {
+				mutex_exit(&zs->zst_lock);
+				goto top;
+			}
+
+			zs->zst_offset = zs->zst_offset > zh->zst_len ?
+			    zs->zst_offset - zh->zst_len : 0;
+			zs->zst_ph_offset = zs->zst_ph_offset > zh->zst_len ?
+			    zs->zst_ph_offset - zh->zst_len : 0;
+			zs->zst_len += zh->zst_len;
+
+			diff = zs->zst_len - zfetch_block_cap;
+			if (diff > 0) {
+				zs->zst_ph_offset = zs->zst_ph_offset > diff ?
+				    zs->zst_ph_offset - diff : 0;
+				zs->zst_len = zs->zst_len > diff ?
+				    zs->zst_len - diff : zs->zst_len;
+			}
+			zs->zst_direction = ZFETCH_BACKWARD;
+
+			break;
+
+		} else if ((zh->zst_offset - zs->zst_offset - zs->zst_stride <
+		    zs->zst_len) && (zs->zst_len != zs->zst_stride)) {
+			/* strided forward access */
+
+			mutex_enter(&zs->zst_lock);
+
+			if ((zh->zst_offset - zs->zst_offset - zs->zst_stride >=
+			    zs->zst_len) || (zs->zst_len == zs->zst_stride)) {
+				mutex_exit(&zs->zst_lock);
+				goto top;
+			}
+
+			zs->zst_offset += zs->zst_stride;
+			zs->zst_direction = ZFETCH_FORWARD;
+
+			break;
+
+		} else if ((zh->zst_offset - zs->zst_offset + zs->zst_stride <
+		    zs->zst_len) && (zs->zst_len != zs->zst_stride)) {
+			/* strided reverse access */
+
+			mutex_enter(&zs->zst_lock);
+
+			if ((zh->zst_offset - zs->zst_offset + zs->zst_stride >=
+			    zs->zst_len) || (zs->zst_len == zs->zst_stride)) {
+				mutex_exit(&zs->zst_lock);
+				goto top;
+			}
+
+			zs->zst_offset = zs->zst_offset > zs->zst_stride ?
+			    zs->zst_offset - zs->zst_stride : 0;
+			zs->zst_ph_offset = (zs->zst_ph_offset >
+			    (2 * zs->zst_stride)) ?
+			    (zs->zst_ph_offset - (2 * zs->zst_stride)) : 0;
+			zs->zst_direction = ZFETCH_BACKWARD;
+
+			break;
+		}
+	}
+
+	if (zs) {
+		if (reset) {
+			zstream_t *remove = zs;
+
+			ZFETCHSTAT_BUMP(zfetchstat_stream_resets);
+			rc = 0;
+			mutex_exit(&zs->zst_lock);
+			rw_exit(&zf->zf_rwlock);
+			rw_enter(&zf->zf_rwlock, RW_WRITER);
+			/*
+			 * Relocate the stream, in case someone removes
+			 * it while we were acquiring the WRITER lock.
+			 */
+			for (zs = list_head(&zf->zf_stream); zs;
+			    zs = list_next(&zf->zf_stream, zs)) {
+				if (zs == remove) {
+					dmu_zfetch_stream_remove(zf, zs);
+					mutex_destroy(&zs->zst_lock);
+					kmem_free(zs, sizeof (zstream_t));
+					break;
+				}
+			}
+		} else {
+			ZFETCHSTAT_BUMP(zfetchstat_stream_noresets);
+			rc = 1;
+			dmu_zfetch_dofetch(zf, zs);
+			mutex_exit(&zs->zst_lock);
+		}
+	}
+out:
+	rw_exit(&zf->zf_rwlock);
+	return (rc);
+}
+
+/*
+ * Clean-up state associated with a zfetch structure.  This frees allocated
+ * structure members, empties the zf_stream tree, and generally makes things
+ * nice.  This doesn't free the zfetch_t itself, that's left to the caller.
+ */
+void
+dmu_zfetch_rele(zfetch_t *zf)
+{
+	zstream_t	*zs;
+	zstream_t	*zs_next;
+
+	ASSERT(!RW_LOCK_HELD(&zf->zf_rwlock));
+
+	for (zs = list_head(&zf->zf_stream); zs; zs = zs_next) {
+		zs_next = list_next(&zf->zf_stream, zs);
+
+		list_remove(&zf->zf_stream, zs);
+		mutex_destroy(&zs->zst_lock);
+		kmem_free(zs, sizeof (zstream_t));
+	}
+	list_destroy(&zf->zf_stream);
+	rw_destroy(&zf->zf_rwlock);
+
+	zf->zf_dnode = NULL;
+}
+
+/*
+ * Given a zfetch and zstream structure, insert the zstream structure into the
+ * AVL tree contained within the zfetch structure.  Peform the appropriate
+ * book-keeping.  It is possible that another thread has inserted a stream which
+ * matches one that we are about to insert, so we must be sure to check for this
+ * case.  If one is found, return failure, and let the caller cleanup the
+ * duplicates.
+ */
+static int
+dmu_zfetch_stream_insert(zfetch_t *zf, zstream_t *zs)
+{
+	zstream_t	*zs_walk;
+	zstream_t	*zs_next;
+
+	ASSERT(RW_WRITE_HELD(&zf->zf_rwlock));
+
+	for (zs_walk = list_head(&zf->zf_stream); zs_walk; zs_walk = zs_next) {
+		zs_next = list_next(&zf->zf_stream, zs_walk);
+
+		if (dmu_zfetch_streams_equal(zs_walk, zs)) {
+			return (0);
+		}
+	}
+
+	list_insert_head(&zf->zf_stream, zs);
+	zf->zf_stream_cnt++;
+	return (1);
+}
+
+
+/*
+ * Walk the list of zstreams in the given zfetch, find an old one (by time), and
+ * reclaim it for use by the caller.
+ */
+static zstream_t *
+dmu_zfetch_stream_reclaim(zfetch_t *zf)
+{
+	zstream_t	*zs;
+
+	if (! rw_tryenter(&zf->zf_rwlock, RW_WRITER))
+		return (0);
+
+	for (zs = list_head(&zf->zf_stream); zs;
+	    zs = list_next(&zf->zf_stream, zs)) {
+
+		if (((ddi_get_lbolt() - zs->zst_last)/hz) > zfetch_min_sec_reap)
+			break;
+	}
+
+	if (zs) {
+		dmu_zfetch_stream_remove(zf, zs);
+		mutex_destroy(&zs->zst_lock);
+		bzero(zs, sizeof (zstream_t));
+	} else {
+		zf->zf_alloc_fail++;
+	}
+	rw_exit(&zf->zf_rwlock);
+
+	return (zs);
+}
+
+/*
+ * Given a zfetch and zstream structure, remove the zstream structure from its
+ * container in the zfetch structure.  Perform the appropriate book-keeping.
+ */
+static void
+dmu_zfetch_stream_remove(zfetch_t *zf, zstream_t *zs)
+{
+	ASSERT(RW_WRITE_HELD(&zf->zf_rwlock));
+
+	list_remove(&zf->zf_stream, zs);
+	zf->zf_stream_cnt--;
+}
+
+static int
+dmu_zfetch_streams_equal(zstream_t *zs1, zstream_t *zs2)
+{
+	if (zs1->zst_offset != zs2->zst_offset)
+		return (0);
+
+	if (zs1->zst_len != zs2->zst_len)
+		return (0);
+
+	if (zs1->zst_stride != zs2->zst_stride)
+		return (0);
+
+	if (zs1->zst_ph_offset != zs2->zst_ph_offset)
+		return (0);
+
+	if (zs1->zst_cap != zs2->zst_cap)
+		return (0);
+
+	if (zs1->zst_direction != zs2->zst_direction)
+		return (0);
+
+	return (1);
+}
+
+/*
+ * This is the prefetch entry point.  It calls all of the other dmu_zfetch
+ * routines to create, delete, find, or operate upon prefetch streams.
+ */
+void
+dmu_zfetch(zfetch_t *zf, uint64_t offset, uint64_t size, int prefetched)
+{
+	zstream_t	zst;
+	zstream_t	*newstream;
+	int		fetched;
+	int		inserted;
+	unsigned int	blkshft;
+	uint64_t	blksz;
+
+	if (zfs_prefetch_disable)
+		return;
+
+	/* files that aren't ln2 blocksz are only one block -- nothing to do */
+	if (!zf->zf_dnode->dn_datablkshift)
+		return;
+
+	/* convert offset and size, into blockid and nblocks */
+	blkshft = zf->zf_dnode->dn_datablkshift;
+	blksz = (1 << blkshft);
+
+	bzero(&zst, sizeof (zstream_t));
+	zst.zst_offset = offset >> blkshft;
+	zst.zst_len = (P2ROUNDUP(offset + size, blksz) -
+	    P2ALIGN(offset, blksz)) >> blkshft;
+
+	fetched = dmu_zfetch_find(zf, &zst, prefetched);
+	if (fetched) {
+		ZFETCHSTAT_BUMP(zfetchstat_hits);
+	} else {
+		ZFETCHSTAT_BUMP(zfetchstat_misses);
+		if (fetched = dmu_zfetch_colinear(zf, &zst)) {
+			ZFETCHSTAT_BUMP(zfetchstat_colinear_hits);
+		} else {
+			ZFETCHSTAT_BUMP(zfetchstat_colinear_misses);
+		}
+	}
+
+	if (!fetched) {
+		newstream = dmu_zfetch_stream_reclaim(zf);
+
+		/*
+		 * we still couldn't find a stream, drop the lock, and allocate
+		 * one if possible.  Otherwise, give up and go home.
+		 */
+		if (newstream) {
+			ZFETCHSTAT_BUMP(zfetchstat_reclaim_successes);
+		} else {
+			uint64_t	maxblocks;
+			uint32_t	max_streams;
+			uint32_t	cur_streams;
+
+			ZFETCHSTAT_BUMP(zfetchstat_reclaim_failures);
+			cur_streams = zf->zf_stream_cnt;
+			maxblocks = zf->zf_dnode->dn_maxblkid;
+
+			max_streams = MIN(zfetch_max_streams,
+			    (maxblocks / zfetch_block_cap));
+			if (max_streams == 0) {
+				max_streams++;
+			}
+
+			if (cur_streams >= max_streams) {
+				return;
+			}
+			newstream = kmem_zalloc(sizeof (zstream_t), KM_SLEEP);
+		}
+
+		newstream->zst_offset = zst.zst_offset;
+		newstream->zst_len = zst.zst_len;
+		newstream->zst_stride = zst.zst_len;
+		newstream->zst_ph_offset = zst.zst_len + zst.zst_offset;
+		newstream->zst_cap = zst.zst_len;
+		newstream->zst_direction = ZFETCH_FORWARD;
+		newstream->zst_last = ddi_get_lbolt();
+
+		mutex_init(&newstream->zst_lock, NULL, MUTEX_DEFAULT, NULL);
+
+		rw_enter(&zf->zf_rwlock, RW_WRITER);
+		inserted = dmu_zfetch_stream_insert(zf, newstream);
+		rw_exit(&zf->zf_rwlock);
+
+		if (!inserted) {
+			mutex_destroy(&newstream->zst_lock);
+			kmem_free(newstream, sizeof (zstream_t));
+		}
+	}
+}
diff --git a/uts/common/fs/zfs/dnode.c b/uts/common/fs/zfs/dnode.c
new file mode 100644
index 000000000000..850dd5816bf3
--- /dev/null
+++ b/uts/common/fs/zfs/dnode.c
@@ -0,0 +1,1993 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/dbuf.h>
+#include <sys/dnode.h>
+#include <sys/dmu.h>
+#include <sys/dmu_impl.h>
+#include <sys/dmu_tx.h>
+#include <sys/dmu_objset.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_dataset.h>
+#include <sys/spa.h>
+#include <sys/zio.h>
+#include <sys/dmu_zfetch.h>
+
+static int free_range_compar(const void *node1, const void *node2);
+
+static kmem_cache_t *dnode_cache;
+/*
+ * Define DNODE_STATS to turn on statistic gathering. By default, it is only
+ * turned on when DEBUG is also defined.
+ */
+#ifdef	DEBUG
+#define	DNODE_STATS
+#endif	/* DEBUG */
+
+#ifdef	DNODE_STATS
+#define	DNODE_STAT_ADD(stat)			((stat)++)
+#else
+#define	DNODE_STAT_ADD(stat)			/* nothing */
+#endif	/* DNODE_STATS */
+
+static dnode_phys_t dnode_phys_zero;
+
+int zfs_default_bs = SPA_MINBLOCKSHIFT;
+int zfs_default_ibs = DN_MAX_INDBLKSHIFT;
+
+static kmem_cbrc_t dnode_move(void *, void *, size_t, void *);
+
+/* ARGSUSED */
+static int
+dnode_cons(void *arg, void *unused, int kmflag)
+{
+	dnode_t *dn = arg;
+	int i;
+
+	rw_init(&dn->dn_struct_rwlock, NULL, RW_DEFAULT, NULL);
+	mutex_init(&dn->dn_mtx, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&dn->dn_dbufs_mtx, NULL, MUTEX_DEFAULT, NULL);
+	cv_init(&dn->dn_notxholds, NULL, CV_DEFAULT, NULL);
+
+	refcount_create(&dn->dn_holds);
+	refcount_create(&dn->dn_tx_holds);
+	list_link_init(&dn->dn_link);
+
+	bzero(&dn->dn_next_nblkptr[0], sizeof (dn->dn_next_nblkptr));
+	bzero(&dn->dn_next_nlevels[0], sizeof (dn->dn_next_nlevels));
+	bzero(&dn->dn_next_indblkshift[0], sizeof (dn->dn_next_indblkshift));
+	bzero(&dn->dn_next_bonustype[0], sizeof (dn->dn_next_bonustype));
+	bzero(&dn->dn_rm_spillblk[0], sizeof (dn->dn_rm_spillblk));
+	bzero(&dn->dn_next_bonuslen[0], sizeof (dn->dn_next_bonuslen));
+	bzero(&dn->dn_next_blksz[0], sizeof (dn->dn_next_blksz));
+
+	for (i = 0; i < TXG_SIZE; i++) {
+		list_link_init(&dn->dn_dirty_link[i]);
+		avl_create(&dn->dn_ranges[i], free_range_compar,
+		    sizeof (free_range_t),
+		    offsetof(struct free_range, fr_node));
+		list_create(&dn->dn_dirty_records[i],
+		    sizeof (dbuf_dirty_record_t),
+		    offsetof(dbuf_dirty_record_t, dr_dirty_node));
+	}
+
+	dn->dn_allocated_txg = 0;
+	dn->dn_free_txg = 0;
+	dn->dn_assigned_txg = 0;
+	dn->dn_dirtyctx = 0;
+	dn->dn_dirtyctx_firstset = NULL;
+	dn->dn_bonus = NULL;
+	dn->dn_have_spill = B_FALSE;
+	dn->dn_zio = NULL;
+	dn->dn_oldused = 0;
+	dn->dn_oldflags = 0;
+	dn->dn_olduid = 0;
+	dn->dn_oldgid = 0;
+	dn->dn_newuid = 0;
+	dn->dn_newgid = 0;
+	dn->dn_id_flags = 0;
+
+	dn->dn_dbufs_count = 0;
+	list_create(&dn->dn_dbufs, sizeof (dmu_buf_impl_t),
+	    offsetof(dmu_buf_impl_t, db_link));
+
+	dn->dn_moved = 0;
+	return (0);
+}
+
+/* ARGSUSED */
+static void
+dnode_dest(void *arg, void *unused)
+{
+	int i;
+	dnode_t *dn = arg;
+
+	rw_destroy(&dn->dn_struct_rwlock);
+	mutex_destroy(&dn->dn_mtx);
+	mutex_destroy(&dn->dn_dbufs_mtx);
+	cv_destroy(&dn->dn_notxholds);
+	refcount_destroy(&dn->dn_holds);
+	refcount_destroy(&dn->dn_tx_holds);
+	ASSERT(!list_link_active(&dn->dn_link));
+
+	for (i = 0; i < TXG_SIZE; i++) {
+		ASSERT(!list_link_active(&dn->dn_dirty_link[i]));
+		avl_destroy(&dn->dn_ranges[i]);
+		list_destroy(&dn->dn_dirty_records[i]);
+		ASSERT3U(dn->dn_next_nblkptr[i], ==, 0);
+		ASSERT3U(dn->dn_next_nlevels[i], ==, 0);
+		ASSERT3U(dn->dn_next_indblkshift[i], ==, 0);
+		ASSERT3U(dn->dn_next_bonustype[i], ==, 0);
+		ASSERT3U(dn->dn_rm_spillblk[i], ==, 0);
+		ASSERT3U(dn->dn_next_bonuslen[i], ==, 0);
+		ASSERT3U(dn->dn_next_blksz[i], ==, 0);
+	}
+
+	ASSERT3U(dn->dn_allocated_txg, ==, 0);
+	ASSERT3U(dn->dn_free_txg, ==, 0);
+	ASSERT3U(dn->dn_assigned_txg, ==, 0);
+	ASSERT3U(dn->dn_dirtyctx, ==, 0);
+	ASSERT3P(dn->dn_dirtyctx_firstset, ==, NULL);
+	ASSERT3P(dn->dn_bonus, ==, NULL);
+	ASSERT(!dn->dn_have_spill);
+	ASSERT3P(dn->dn_zio, ==, NULL);
+	ASSERT3U(dn->dn_oldused, ==, 0);
+	ASSERT3U(dn->dn_oldflags, ==, 0);
+	ASSERT3U(dn->dn_olduid, ==, 0);
+	ASSERT3U(dn->dn_oldgid, ==, 0);
+	ASSERT3U(dn->dn_newuid, ==, 0);
+	ASSERT3U(dn->dn_newgid, ==, 0);
+	ASSERT3U(dn->dn_id_flags, ==, 0);
+
+	ASSERT3U(dn->dn_dbufs_count, ==, 0);
+	list_destroy(&dn->dn_dbufs);
+}
+
+void
+dnode_init(void)
+{
+	ASSERT(dnode_cache == NULL);
+	dnode_cache = kmem_cache_create("dnode_t",
+	    sizeof (dnode_t),
+	    0, dnode_cons, dnode_dest, NULL, NULL, NULL, 0);
+	kmem_cache_set_move(dnode_cache, dnode_move);
+}
+
+void
+dnode_fini(void)
+{
+	kmem_cache_destroy(dnode_cache);
+	dnode_cache = NULL;
+}
+
+
+#ifdef ZFS_DEBUG
+void
+dnode_verify(dnode_t *dn)
+{
+	int drop_struct_lock = FALSE;
+
+	ASSERT(dn->dn_phys);
+	ASSERT(dn->dn_objset);
+	ASSERT(dn->dn_handle->dnh_dnode == dn);
+
+	ASSERT(dn->dn_phys->dn_type < DMU_OT_NUMTYPES);
+
+	if (!(zfs_flags & ZFS_DEBUG_DNODE_VERIFY))
+		return;
+
+	if (!RW_WRITE_HELD(&dn->dn_struct_rwlock)) {
+		rw_enter(&dn->dn_struct_rwlock, RW_READER);
+		drop_struct_lock = TRUE;
+	}
+	if (dn->dn_phys->dn_type != DMU_OT_NONE || dn->dn_allocated_txg != 0) {
+		int i;
+		ASSERT3U(dn->dn_indblkshift, >=, 0);
+		ASSERT3U(dn->dn_indblkshift, <=, SPA_MAXBLOCKSHIFT);
+		if (dn->dn_datablkshift) {
+			ASSERT3U(dn->dn_datablkshift, >=, SPA_MINBLOCKSHIFT);
+			ASSERT3U(dn->dn_datablkshift, <=, SPA_MAXBLOCKSHIFT);
+			ASSERT3U(1<<dn->dn_datablkshift, ==, dn->dn_datablksz);
+		}
+		ASSERT3U(dn->dn_nlevels, <=, 30);
+		ASSERT3U(dn->dn_type, <=, DMU_OT_NUMTYPES);
+		ASSERT3U(dn->dn_nblkptr, >=, 1);
+		ASSERT3U(dn->dn_nblkptr, <=, DN_MAX_NBLKPTR);
+		ASSERT3U(dn->dn_bonuslen, <=, DN_MAX_BONUSLEN);
+		ASSERT3U(dn->dn_datablksz, ==,
+		    dn->dn_datablkszsec << SPA_MINBLOCKSHIFT);
+		ASSERT3U(ISP2(dn->dn_datablksz), ==, dn->dn_datablkshift != 0);
+		ASSERT3U((dn->dn_nblkptr - 1) * sizeof (blkptr_t) +
+		    dn->dn_bonuslen, <=, DN_MAX_BONUSLEN);
+		for (i = 0; i < TXG_SIZE; i++) {
+			ASSERT3U(dn->dn_next_nlevels[i], <=, dn->dn_nlevels);
+		}
+	}
+	if (dn->dn_phys->dn_type != DMU_OT_NONE)
+		ASSERT3U(dn->dn_phys->dn_nlevels, <=, dn->dn_nlevels);
+	ASSERT(DMU_OBJECT_IS_SPECIAL(dn->dn_object) || dn->dn_dbuf != NULL);
+	if (dn->dn_dbuf != NULL) {
+		ASSERT3P(dn->dn_phys, ==,
+		    (dnode_phys_t *)dn->dn_dbuf->db.db_data +
+		    (dn->dn_object % (dn->dn_dbuf->db.db_size >> DNODE_SHIFT)));
+	}
+	if (drop_struct_lock)
+		rw_exit(&dn->dn_struct_rwlock);
+}
+#endif
+
+void
+dnode_byteswap(dnode_phys_t *dnp)
+{
+	uint64_t *buf64 = (void*)&dnp->dn_blkptr;
+	int i;
+
+	if (dnp->dn_type == DMU_OT_NONE) {
+		bzero(dnp, sizeof (dnode_phys_t));
+		return;
+	}
+
+	dnp->dn_datablkszsec = BSWAP_16(dnp->dn_datablkszsec);
+	dnp->dn_bonuslen = BSWAP_16(dnp->dn_bonuslen);
+	dnp->dn_maxblkid = BSWAP_64(dnp->dn_maxblkid);
+	dnp->dn_used = BSWAP_64(dnp->dn_used);
+
+	/*
+	 * dn_nblkptr is only one byte, so it's OK to read it in either
+	 * byte order.  We can't read dn_bouslen.
+	 */
+	ASSERT(dnp->dn_indblkshift <= SPA_MAXBLOCKSHIFT);
+	ASSERT(dnp->dn_nblkptr <= DN_MAX_NBLKPTR);
+	for (i = 0; i < dnp->dn_nblkptr * sizeof (blkptr_t)/8; i++)
+		buf64[i] = BSWAP_64(buf64[i]);
+
+	/*
+	 * OK to check dn_bonuslen for zero, because it won't matter if
+	 * we have the wrong byte order.  This is necessary because the
+	 * dnode dnode is smaller than a regular dnode.
+	 */
+	if (dnp->dn_bonuslen != 0) {
+		/*
+		 * Note that the bonus length calculated here may be
+		 * longer than the actual bonus buffer.  This is because
+		 * we always put the bonus buffer after the last block
+		 * pointer (instead of packing it against the end of the
+		 * dnode buffer).
+		 */
+		int off = (dnp->dn_nblkptr-1) * sizeof (blkptr_t);
+		size_t len = DN_MAX_BONUSLEN - off;
+		ASSERT3U(dnp->dn_bonustype, <, DMU_OT_NUMTYPES);
+		dmu_ot[dnp->dn_bonustype].ot_byteswap(dnp->dn_bonus + off, len);
+	}
+
+	/* Swap SPILL block if we have one */
+	if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR)
+		byteswap_uint64_array(&dnp->dn_spill, sizeof (blkptr_t));
+
+}
+
+void
+dnode_buf_byteswap(void *vbuf, size_t size)
+{
+	dnode_phys_t *buf = vbuf;
+	int i;
+
+	ASSERT3U(sizeof (dnode_phys_t), ==, (1<<DNODE_SHIFT));
+	ASSERT((size & (sizeof (dnode_phys_t)-1)) == 0);
+
+	size >>= DNODE_SHIFT;
+	for (i = 0; i < size; i++) {
+		dnode_byteswap(buf);
+		buf++;
+	}
+}
+
+static int
+free_range_compar(const void *node1, const void *node2)
+{
+	const free_range_t *rp1 = node1;
+	const free_range_t *rp2 = node2;
+
+	if (rp1->fr_blkid < rp2->fr_blkid)
+		return (-1);
+	else if (rp1->fr_blkid > rp2->fr_blkid)
+		return (1);
+	else return (0);
+}
+
+void
+dnode_setbonuslen(dnode_t *dn, int newsize, dmu_tx_t *tx)
+{
+	ASSERT3U(refcount_count(&dn->dn_holds), >=, 1);
+
+	dnode_setdirty(dn, tx);
+	rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+	ASSERT3U(newsize, <=, DN_MAX_BONUSLEN -
+	    (dn->dn_nblkptr-1) * sizeof (blkptr_t));
+	dn->dn_bonuslen = newsize;
+	if (newsize == 0)
+		dn->dn_next_bonuslen[tx->tx_txg & TXG_MASK] = DN_ZERO_BONUSLEN;
+	else
+		dn->dn_next_bonuslen[tx->tx_txg & TXG_MASK] = dn->dn_bonuslen;
+	rw_exit(&dn->dn_struct_rwlock);
+}
+
+void
+dnode_setbonus_type(dnode_t *dn, dmu_object_type_t newtype, dmu_tx_t *tx)
+{
+	ASSERT3U(refcount_count(&dn->dn_holds), >=, 1);
+	dnode_setdirty(dn, tx);
+	rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+	dn->dn_bonustype = newtype;
+	dn->dn_next_bonustype[tx->tx_txg & TXG_MASK] = dn->dn_bonustype;
+	rw_exit(&dn->dn_struct_rwlock);
+}
+
+void
+dnode_rm_spill(dnode_t *dn, dmu_tx_t *tx)
+{
+	ASSERT3U(refcount_count(&dn->dn_holds), >=, 1);
+	ASSERT(RW_WRITE_HELD(&dn->dn_struct_rwlock));
+	dnode_setdirty(dn, tx);
+	dn->dn_rm_spillblk[tx->tx_txg&TXG_MASK] = DN_KILL_SPILLBLK;
+	dn->dn_have_spill = B_FALSE;
+}
+
+static void
+dnode_setdblksz(dnode_t *dn, int size)
+{
+	ASSERT3U(P2PHASE(size, SPA_MINBLOCKSIZE), ==, 0);
+	ASSERT3U(size, <=, SPA_MAXBLOCKSIZE);
+	ASSERT3U(size, >=, SPA_MINBLOCKSIZE);
+	ASSERT3U(size >> SPA_MINBLOCKSHIFT, <,
+	    1<<(sizeof (dn->dn_phys->dn_datablkszsec) * 8));
+	dn->dn_datablksz = size;
+	dn->dn_datablkszsec = size >> SPA_MINBLOCKSHIFT;
+	dn->dn_datablkshift = ISP2(size) ? highbit(size - 1) : 0;
+}
+
+static dnode_t *
+dnode_create(objset_t *os, dnode_phys_t *dnp, dmu_buf_impl_t *db,
+    uint64_t object, dnode_handle_t *dnh)
+{
+	dnode_t *dn = kmem_cache_alloc(dnode_cache, KM_SLEEP);
+
+	ASSERT(!POINTER_IS_VALID(dn->dn_objset));
+	dn->dn_moved = 0;
+
+	/*
+	 * Defer setting dn_objset until the dnode is ready to be a candidate
+	 * for the dnode_move() callback.
+	 */
+	dn->dn_object = object;
+	dn->dn_dbuf = db;
+	dn->dn_handle = dnh;
+	dn->dn_phys = dnp;
+
+	if (dnp->dn_datablkszsec) {
+		dnode_setdblksz(dn, dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
+	} else {
+		dn->dn_datablksz = 0;
+		dn->dn_datablkszsec = 0;
+		dn->dn_datablkshift = 0;
+	}
+	dn->dn_indblkshift = dnp->dn_indblkshift;
+	dn->dn_nlevels = dnp->dn_nlevels;
+	dn->dn_type = dnp->dn_type;
+	dn->dn_nblkptr = dnp->dn_nblkptr;
+	dn->dn_checksum = dnp->dn_checksum;
+	dn->dn_compress = dnp->dn_compress;
+	dn->dn_bonustype = dnp->dn_bonustype;
+	dn->dn_bonuslen = dnp->dn_bonuslen;
+	dn->dn_maxblkid = dnp->dn_maxblkid;
+	dn->dn_have_spill = ((dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) != 0);
+	dn->dn_id_flags = 0;
+
+	dmu_zfetch_init(&dn->dn_zfetch, dn);
+
+	ASSERT(dn->dn_phys->dn_type < DMU_OT_NUMTYPES);
+
+	mutex_enter(&os->os_lock);
+	list_insert_head(&os->os_dnodes, dn);
+	membar_producer();
+	/*
+	 * Everything else must be valid before assigning dn_objset makes the
+	 * dnode eligible for dnode_move().
+	 */
+	dn->dn_objset = os;
+	mutex_exit(&os->os_lock);
+
+	arc_space_consume(sizeof (dnode_t), ARC_SPACE_OTHER);
+	return (dn);
+}
+
+/*
+ * Caller must be holding the dnode handle, which is released upon return.
+ */
+static void
+dnode_destroy(dnode_t *dn)
+{
+	objset_t *os = dn->dn_objset;
+
+	ASSERT((dn->dn_id_flags & DN_ID_NEW_EXIST) == 0);
+
+	mutex_enter(&os->os_lock);
+	POINTER_INVALIDATE(&dn->dn_objset);
+	list_remove(&os->os_dnodes, dn);
+	mutex_exit(&os->os_lock);
+
+	/* the dnode can no longer move, so we can release the handle */
+	zrl_remove(&dn->dn_handle->dnh_zrlock);
+
+	dn->dn_allocated_txg = 0;
+	dn->dn_free_txg = 0;
+	dn->dn_assigned_txg = 0;
+
+	dn->dn_dirtyctx = 0;
+	if (dn->dn_dirtyctx_firstset != NULL) {
+		kmem_free(dn->dn_dirtyctx_firstset, 1);
+		dn->dn_dirtyctx_firstset = NULL;
+	}
+	if (dn->dn_bonus != NULL) {
+		mutex_enter(&dn->dn_bonus->db_mtx);
+		dbuf_evict(dn->dn_bonus);
+		dn->dn_bonus = NULL;
+	}
+	dn->dn_zio = NULL;
+
+	dn->dn_have_spill = B_FALSE;
+	dn->dn_oldused = 0;
+	dn->dn_oldflags = 0;
+	dn->dn_olduid = 0;
+	dn->dn_oldgid = 0;
+	dn->dn_newuid = 0;
+	dn->dn_newgid = 0;
+	dn->dn_id_flags = 0;
+
+	dmu_zfetch_rele(&dn->dn_zfetch);
+	kmem_cache_free(dnode_cache, dn);
+	arc_space_return(sizeof (dnode_t), ARC_SPACE_OTHER);
+}
+
+void
+dnode_allocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, int ibs,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
+{
+	int i;
+
+	if (blocksize == 0)
+		blocksize = 1 << zfs_default_bs;
+	else if (blocksize > SPA_MAXBLOCKSIZE)
+		blocksize = SPA_MAXBLOCKSIZE;
+	else
+		blocksize = P2ROUNDUP(blocksize, SPA_MINBLOCKSIZE);
+
+	if (ibs == 0)
+		ibs = zfs_default_ibs;
+
+	ibs = MIN(MAX(ibs, DN_MIN_INDBLKSHIFT), DN_MAX_INDBLKSHIFT);
+
+	dprintf("os=%p obj=%llu txg=%llu blocksize=%d ibs=%d\n", dn->dn_objset,
+	    dn->dn_object, tx->tx_txg, blocksize, ibs);
+
+	ASSERT(dn->dn_type == DMU_OT_NONE);
+	ASSERT(bcmp(dn->dn_phys, &dnode_phys_zero, sizeof (dnode_phys_t)) == 0);
+	ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE);
+	ASSERT(ot != DMU_OT_NONE);
+	ASSERT3U(ot, <, DMU_OT_NUMTYPES);
+	ASSERT((bonustype == DMU_OT_NONE && bonuslen == 0) ||
+	    (bonustype == DMU_OT_SA && bonuslen == 0) ||
+	    (bonustype != DMU_OT_NONE && bonuslen != 0));
+	ASSERT3U(bonustype, <, DMU_OT_NUMTYPES);
+	ASSERT3U(bonuslen, <=, DN_MAX_BONUSLEN);
+	ASSERT(dn->dn_type == DMU_OT_NONE);
+	ASSERT3U(dn->dn_maxblkid, ==, 0);
+	ASSERT3U(dn->dn_allocated_txg, ==, 0);
+	ASSERT3U(dn->dn_assigned_txg, ==, 0);
+	ASSERT(refcount_is_zero(&dn->dn_tx_holds));
+	ASSERT3U(refcount_count(&dn->dn_holds), <=, 1);
+	ASSERT3P(list_head(&dn->dn_dbufs), ==, NULL);
+
+	for (i = 0; i < TXG_SIZE; i++) {
+		ASSERT3U(dn->dn_next_nblkptr[i], ==, 0);
+		ASSERT3U(dn->dn_next_nlevels[i], ==, 0);
+		ASSERT3U(dn->dn_next_indblkshift[i], ==, 0);
+		ASSERT3U(dn->dn_next_bonuslen[i], ==, 0);
+		ASSERT3U(dn->dn_next_bonustype[i], ==, 0);
+		ASSERT3U(dn->dn_rm_spillblk[i], ==, 0);
+		ASSERT3U(dn->dn_next_blksz[i], ==, 0);
+		ASSERT(!list_link_active(&dn->dn_dirty_link[i]));
+		ASSERT3P(list_head(&dn->dn_dirty_records[i]), ==, NULL);
+		ASSERT3U(avl_numnodes(&dn->dn_ranges[i]), ==, 0);
+	}
+
+	dn->dn_type = ot;
+	dnode_setdblksz(dn, blocksize);
+	dn->dn_indblkshift = ibs;
+	dn->dn_nlevels = 1;
+	if (bonustype == DMU_OT_SA) /* Maximize bonus space for SA */
+		dn->dn_nblkptr = 1;
+	else
+		dn->dn_nblkptr = 1 +
+		    ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT);
+	dn->dn_bonustype = bonustype;
+	dn->dn_bonuslen = bonuslen;
+	dn->dn_checksum = ZIO_CHECKSUM_INHERIT;
+	dn->dn_compress = ZIO_COMPRESS_INHERIT;
+	dn->dn_dirtyctx = 0;
+
+	dn->dn_free_txg = 0;
+	if (dn->dn_dirtyctx_firstset) {
+		kmem_free(dn->dn_dirtyctx_firstset, 1);
+		dn->dn_dirtyctx_firstset = NULL;
+	}
+
+	dn->dn_allocated_txg = tx->tx_txg;
+	dn->dn_id_flags = 0;
+
+	dnode_setdirty(dn, tx);
+	dn->dn_next_indblkshift[tx->tx_txg & TXG_MASK] = ibs;
+	dn->dn_next_bonuslen[tx->tx_txg & TXG_MASK] = dn->dn_bonuslen;
+	dn->dn_next_bonustype[tx->tx_txg & TXG_MASK] = dn->dn_bonustype;
+	dn->dn_next_blksz[tx->tx_txg & TXG_MASK] = dn->dn_datablksz;
+}
+
+void
+dnode_reallocate(dnode_t *dn, dmu_object_type_t ot, int blocksize,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
+{
+	int nblkptr;
+
+	ASSERT3U(blocksize, >=, SPA_MINBLOCKSIZE);
+	ASSERT3U(blocksize, <=, SPA_MAXBLOCKSIZE);
+	ASSERT3U(blocksize % SPA_MINBLOCKSIZE, ==, 0);
+	ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT || dmu_tx_private_ok(tx));
+	ASSERT(tx->tx_txg != 0);
+	ASSERT((bonustype == DMU_OT_NONE && bonuslen == 0) ||
+	    (bonustype != DMU_OT_NONE && bonuslen != 0) ||
+	    (bonustype == DMU_OT_SA && bonuslen == 0));
+	ASSERT3U(bonustype, <, DMU_OT_NUMTYPES);
+	ASSERT3U(bonuslen, <=, DN_MAX_BONUSLEN);
+
+	/* clean up any unreferenced dbufs */
+	dnode_evict_dbufs(dn);
+
+	dn->dn_id_flags = 0;
+
+	rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+	dnode_setdirty(dn, tx);
+	if (dn->dn_datablksz != blocksize) {
+		/* change blocksize */
+		ASSERT(dn->dn_maxblkid == 0 &&
+		    (BP_IS_HOLE(&dn->dn_phys->dn_blkptr[0]) ||
+		    dnode_block_freed(dn, 0)));
+		dnode_setdblksz(dn, blocksize);
+		dn->dn_next_blksz[tx->tx_txg&TXG_MASK] = blocksize;
+	}
+	if (dn->dn_bonuslen != bonuslen)
+		dn->dn_next_bonuslen[tx->tx_txg&TXG_MASK] = bonuslen;
+
+	if (bonustype == DMU_OT_SA) /* Maximize bonus space for SA */
+		nblkptr = 1;
+	else
+		nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT);
+	if (dn->dn_bonustype != bonustype)
+		dn->dn_next_bonustype[tx->tx_txg&TXG_MASK] = bonustype;
+	if (dn->dn_nblkptr != nblkptr)
+		dn->dn_next_nblkptr[tx->tx_txg&TXG_MASK] = nblkptr;
+	if (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) {
+		dbuf_rm_spill(dn, tx);
+		dnode_rm_spill(dn, tx);
+	}
+	rw_exit(&dn->dn_struct_rwlock);
+
+	/* change type */
+	dn->dn_type = ot;
+
+	/* change bonus size and type */
+	mutex_enter(&dn->dn_mtx);
+	dn->dn_bonustype = bonustype;
+	dn->dn_bonuslen = bonuslen;
+	dn->dn_nblkptr = nblkptr;
+	dn->dn_checksum = ZIO_CHECKSUM_INHERIT;
+	dn->dn_compress = ZIO_COMPRESS_INHERIT;
+	ASSERT3U(dn->dn_nblkptr, <=, DN_MAX_NBLKPTR);
+
+	/* fix up the bonus db_size */
+	if (dn->dn_bonus) {
+		dn->dn_bonus->db.db_size =
+		    DN_MAX_BONUSLEN - (dn->dn_nblkptr-1) * sizeof (blkptr_t);
+		ASSERT(dn->dn_bonuslen <= dn->dn_bonus->db.db_size);
+	}
+
+	dn->dn_allocated_txg = tx->tx_txg;
+	mutex_exit(&dn->dn_mtx);
+}
+
+#ifdef	DNODE_STATS
+static struct {
+	uint64_t dms_dnode_invalid;
+	uint64_t dms_dnode_recheck1;
+	uint64_t dms_dnode_recheck2;
+	uint64_t dms_dnode_special;
+	uint64_t dms_dnode_handle;
+	uint64_t dms_dnode_rwlock;
+	uint64_t dms_dnode_active;
+} dnode_move_stats;
+#endif	/* DNODE_STATS */
+
+static void
+dnode_move_impl(dnode_t *odn, dnode_t *ndn)
+{
+	int i;
+
+	ASSERT(!RW_LOCK_HELD(&odn->dn_struct_rwlock));
+	ASSERT(MUTEX_NOT_HELD(&odn->dn_mtx));
+	ASSERT(MUTEX_NOT_HELD(&odn->dn_dbufs_mtx));
+	ASSERT(!RW_LOCK_HELD(&odn->dn_zfetch.zf_rwlock));
+
+	/* Copy fields. */
+	ndn->dn_objset = odn->dn_objset;
+	ndn->dn_object = odn->dn_object;
+	ndn->dn_dbuf = odn->dn_dbuf;
+	ndn->dn_handle = odn->dn_handle;
+	ndn->dn_phys = odn->dn_phys;
+	ndn->dn_type = odn->dn_type;
+	ndn->dn_bonuslen = odn->dn_bonuslen;
+	ndn->dn_bonustype = odn->dn_bonustype;
+	ndn->dn_nblkptr = odn->dn_nblkptr;
+	ndn->dn_checksum = odn->dn_checksum;
+	ndn->dn_compress = odn->dn_compress;
+	ndn->dn_nlevels = odn->dn_nlevels;
+	ndn->dn_indblkshift = odn->dn_indblkshift;
+	ndn->dn_datablkshift = odn->dn_datablkshift;
+	ndn->dn_datablkszsec = odn->dn_datablkszsec;
+	ndn->dn_datablksz = odn->dn_datablksz;
+	ndn->dn_maxblkid = odn->dn_maxblkid;
+	bcopy(&odn->dn_next_nblkptr[0], &ndn->dn_next_nblkptr[0],
+	    sizeof (odn->dn_next_nblkptr));
+	bcopy(&odn->dn_next_nlevels[0], &ndn->dn_next_nlevels[0],
+	    sizeof (odn->dn_next_nlevels));
+	bcopy(&odn->dn_next_indblkshift[0], &ndn->dn_next_indblkshift[0],
+	    sizeof (odn->dn_next_indblkshift));
+	bcopy(&odn->dn_next_bonustype[0], &ndn->dn_next_bonustype[0],
+	    sizeof (odn->dn_next_bonustype));
+	bcopy(&odn->dn_rm_spillblk[0], &ndn->dn_rm_spillblk[0],
+	    sizeof (odn->dn_rm_spillblk));
+	bcopy(&odn->dn_next_bonuslen[0], &ndn->dn_next_bonuslen[0],
+	    sizeof (odn->dn_next_bonuslen));
+	bcopy(&odn->dn_next_blksz[0], &ndn->dn_next_blksz[0],
+	    sizeof (odn->dn_next_blksz));
+	for (i = 0; i < TXG_SIZE; i++) {
+		list_move_tail(&ndn->dn_dirty_records[i],
+		    &odn->dn_dirty_records[i]);
+	}
+	bcopy(&odn->dn_ranges[0], &ndn->dn_ranges[0], sizeof (odn->dn_ranges));
+	ndn->dn_allocated_txg = odn->dn_allocated_txg;
+	ndn->dn_free_txg = odn->dn_free_txg;
+	ndn->dn_assigned_txg = odn->dn_assigned_txg;
+	ndn->dn_dirtyctx = odn->dn_dirtyctx;
+	ndn->dn_dirtyctx_firstset = odn->dn_dirtyctx_firstset;
+	ASSERT(refcount_count(&odn->dn_tx_holds) == 0);
+	refcount_transfer(&ndn->dn_holds, &odn->dn_holds);
+	ASSERT(list_is_empty(&ndn->dn_dbufs));
+	list_move_tail(&ndn->dn_dbufs, &odn->dn_dbufs);
+	ndn->dn_dbufs_count = odn->dn_dbufs_count;
+	ndn->dn_bonus = odn->dn_bonus;
+	ndn->dn_have_spill = odn->dn_have_spill;
+	ndn->dn_zio = odn->dn_zio;
+	ndn->dn_oldused = odn->dn_oldused;
+	ndn->dn_oldflags = odn->dn_oldflags;
+	ndn->dn_olduid = odn->dn_olduid;
+	ndn->dn_oldgid = odn->dn_oldgid;
+	ndn->dn_newuid = odn->dn_newuid;
+	ndn->dn_newgid = odn->dn_newgid;
+	ndn->dn_id_flags = odn->dn_id_flags;
+	dmu_zfetch_init(&ndn->dn_zfetch, NULL);
+	list_move_tail(&ndn->dn_zfetch.zf_stream, &odn->dn_zfetch.zf_stream);
+	ndn->dn_zfetch.zf_dnode = odn->dn_zfetch.zf_dnode;
+	ndn->dn_zfetch.zf_stream_cnt = odn->dn_zfetch.zf_stream_cnt;
+	ndn->dn_zfetch.zf_alloc_fail = odn->dn_zfetch.zf_alloc_fail;
+
+	/*
+	 * Update back pointers. Updating the handle fixes the back pointer of
+	 * every descendant dbuf as well as the bonus dbuf.
+	 */
+	ASSERT(ndn->dn_handle->dnh_dnode == odn);
+	ndn->dn_handle->dnh_dnode = ndn;
+	if (ndn->dn_zfetch.zf_dnode == odn) {
+		ndn->dn_zfetch.zf_dnode = ndn;
+	}
+
+	/*
+	 * Invalidate the original dnode by clearing all of its back pointers.
+	 */
+	odn->dn_dbuf = NULL;
+	odn->dn_handle = NULL;
+	list_create(&odn->dn_dbufs, sizeof (dmu_buf_impl_t),
+	    offsetof(dmu_buf_impl_t, db_link));
+	odn->dn_dbufs_count = 0;
+	odn->dn_bonus = NULL;
+	odn->dn_zfetch.zf_dnode = NULL;
+
+	/*
+	 * Set the low bit of the objset pointer to ensure that dnode_move()
+	 * recognizes the dnode as invalid in any subsequent callback.
+	 */
+	POINTER_INVALIDATE(&odn->dn_objset);
+
+	/*
+	 * Satisfy the destructor.
+	 */
+	for (i = 0; i < TXG_SIZE; i++) {
+		list_create(&odn->dn_dirty_records[i],
+		    sizeof (dbuf_dirty_record_t),
+		    offsetof(dbuf_dirty_record_t, dr_dirty_node));
+		odn->dn_ranges[i].avl_root = NULL;
+		odn->dn_ranges[i].avl_numnodes = 0;
+		odn->dn_next_nlevels[i] = 0;
+		odn->dn_next_indblkshift[i] = 0;
+		odn->dn_next_bonustype[i] = 0;
+		odn->dn_rm_spillblk[i] = 0;
+		odn->dn_next_bonuslen[i] = 0;
+		odn->dn_next_blksz[i] = 0;
+	}
+	odn->dn_allocated_txg = 0;
+	odn->dn_free_txg = 0;
+	odn->dn_assigned_txg = 0;
+	odn->dn_dirtyctx = 0;
+	odn->dn_dirtyctx_firstset = NULL;
+	odn->dn_have_spill = B_FALSE;
+	odn->dn_zio = NULL;
+	odn->dn_oldused = 0;
+	odn->dn_oldflags = 0;
+	odn->dn_olduid = 0;
+	odn->dn_oldgid = 0;
+	odn->dn_newuid = 0;
+	odn->dn_newgid = 0;
+	odn->dn_id_flags = 0;
+
+	/*
+	 * Mark the dnode.
+	 */
+	ndn->dn_moved = 1;
+	odn->dn_moved = (uint8_t)-1;
+}
+
+#ifdef	_KERNEL
+/*ARGSUSED*/
+static kmem_cbrc_t
+dnode_move(void *buf, void *newbuf, size_t size, void *arg)
+{
+	dnode_t *odn = buf, *ndn = newbuf;
+	objset_t *os;
+	int64_t refcount;
+	uint32_t dbufs;
+
+	/*
+	 * The dnode is on the objset's list of known dnodes if the objset
+	 * pointer is valid. We set the low bit of the objset pointer when
+	 * freeing the dnode to invalidate it, and the memory patterns written
+	 * by kmem (baddcafe and deadbeef) set at least one of the two low bits.
+	 * A newly created dnode sets the objset pointer last of all to indicate
+	 * that the dnode is known and in a valid state to be moved by this
+	 * function.
+	 */
+	os = odn->dn_objset;
+	if (!POINTER_IS_VALID(os)) {
+		DNODE_STAT_ADD(dnode_move_stats.dms_dnode_invalid);
+		return (KMEM_CBRC_DONT_KNOW);
+	}
+
+	/*
+	 * Ensure that the objset does not go away during the move.
+	 */
+	rw_enter(&os_lock, RW_WRITER);
+	if (os != odn->dn_objset) {
+		rw_exit(&os_lock);
+		DNODE_STAT_ADD(dnode_move_stats.dms_dnode_recheck1);
+		return (KMEM_CBRC_DONT_KNOW);
+	}
+
+	/*
+	 * If the dnode is still valid, then so is the objset. We know that no
+	 * valid objset can be freed while we hold os_lock, so we can safely
+	 * ensure that the objset remains in use.
+	 */
+	mutex_enter(&os->os_lock);
+
+	/*
+	 * Recheck the objset pointer in case the dnode was removed just before
+	 * acquiring the lock.
+	 */
+	if (os != odn->dn_objset) {
+		mutex_exit(&os->os_lock);
+		rw_exit(&os_lock);
+		DNODE_STAT_ADD(dnode_move_stats.dms_dnode_recheck2);
+		return (KMEM_CBRC_DONT_KNOW);
+	}
+
+	/*
+	 * At this point we know that as long as we hold os->os_lock, the dnode
+	 * cannot be freed and fields within the dnode can be safely accessed.
+	 * The objset listing this dnode cannot go away as long as this dnode is
+	 * on its list.
+	 */
+	rw_exit(&os_lock);
+	if (DMU_OBJECT_IS_SPECIAL(odn->dn_object)) {
+		mutex_exit(&os->os_lock);
+		DNODE_STAT_ADD(dnode_move_stats.dms_dnode_special);
+		return (KMEM_CBRC_NO);
+	}
+	ASSERT(odn->dn_dbuf != NULL); /* only "special" dnodes have no parent */
+
+	/*
+	 * Lock the dnode handle to prevent the dnode from obtaining any new
+	 * holds. This also prevents the descendant dbufs and the bonus dbuf
+	 * from accessing the dnode, so that we can discount their holds. The
+	 * handle is safe to access because we know that while the dnode cannot
+	 * go away, neither can its handle. Once we hold dnh_zrlock, we can
+	 * safely move any dnode referenced only by dbufs.
+	 */
+	if (!zrl_tryenter(&odn->dn_handle->dnh_zrlock)) {
+		mutex_exit(&os->os_lock);
+		DNODE_STAT_ADD(dnode_move_stats.dms_dnode_handle);
+		return (KMEM_CBRC_LATER);
+	}
+
+	/*
+	 * Ensure a consistent view of the dnode's holds and the dnode's dbufs.
+	 * We need to guarantee that there is a hold for every dbuf in order to
+	 * determine whether the dnode is actively referenced. Falsely matching
+	 * a dbuf to an active hold would lead to an unsafe move. It's possible
+	 * that a thread already having an active dnode hold is about to add a
+	 * dbuf, and we can't compare hold and dbuf counts while the add is in
+	 * progress.
+	 */
+	if (!rw_tryenter(&odn->dn_struct_rwlock, RW_WRITER)) {
+		zrl_exit(&odn->dn_handle->dnh_zrlock);
+		mutex_exit(&os->os_lock);
+		DNODE_STAT_ADD(dnode_move_stats.dms_dnode_rwlock);
+		return (KMEM_CBRC_LATER);
+	}
+
+	/*
+	 * A dbuf may be removed (evicted) without an active dnode hold. In that
+	 * case, the dbuf count is decremented under the handle lock before the
+	 * dbuf's hold is released. This order ensures that if we count the hold
+	 * after the dbuf is removed but before its hold is released, we will
+	 * treat the unmatched hold as active and exit safely. If we count the
+	 * hold before the dbuf is removed, the hold is discounted, and the
+	 * removal is blocked until the move completes.
+	 */
+	refcount = refcount_count(&odn->dn_holds);
+	ASSERT(refcount >= 0);
+	dbufs = odn->dn_dbufs_count;
+
+	/* We can't have more dbufs than dnode holds. */
+	ASSERT3U(dbufs, <=, refcount);
+	DTRACE_PROBE3(dnode__move, dnode_t *, odn, int64_t, refcount,
+	    uint32_t, dbufs);
+
+	if (refcount > dbufs) {
+		rw_exit(&odn->dn_struct_rwlock);
+		zrl_exit(&odn->dn_handle->dnh_zrlock);
+		mutex_exit(&os->os_lock);
+		DNODE_STAT_ADD(dnode_move_stats.dms_dnode_active);
+		return (KMEM_CBRC_LATER);
+	}
+
+	rw_exit(&odn->dn_struct_rwlock);
+
+	/*
+	 * At this point we know that anyone with a hold on the dnode is not
+	 * actively referencing it. The dnode is known and in a valid state to
+	 * move. We're holding the locks needed to execute the critical section.
+	 */
+	dnode_move_impl(odn, ndn);
+
+	list_link_replace(&odn->dn_link, &ndn->dn_link);
+	/* If the dnode was safe to move, the refcount cannot have changed. */
+	ASSERT(refcount == refcount_count(&ndn->dn_holds));
+	ASSERT(dbufs == ndn->dn_dbufs_count);
+	zrl_exit(&ndn->dn_handle->dnh_zrlock); /* handle has moved */
+	mutex_exit(&os->os_lock);
+
+	return (KMEM_CBRC_YES);
+}
+#endif	/* _KERNEL */
+
+void
+dnode_special_close(dnode_handle_t *dnh)
+{
+	dnode_t *dn = dnh->dnh_dnode;
+
+	/*
+	 * Wait for final references to the dnode to clear.  This can
+	 * only happen if the arc is asyncronously evicting state that
+	 * has a hold on this dnode while we are trying to evict this
+	 * dnode.
+	 */
+	while (refcount_count(&dn->dn_holds) > 0)
+		delay(1);
+	zrl_add(&dnh->dnh_zrlock);
+	dnode_destroy(dn); /* implicit zrl_remove() */
+	zrl_destroy(&dnh->dnh_zrlock);
+	dnh->dnh_dnode = NULL;
+}
+
+dnode_t *
+dnode_special_open(objset_t *os, dnode_phys_t *dnp, uint64_t object,
+    dnode_handle_t *dnh)
+{
+	dnode_t *dn = dnode_create(os, dnp, NULL, object, dnh);
+	dnh->dnh_dnode = dn;
+	zrl_init(&dnh->dnh_zrlock);
+	DNODE_VERIFY(dn);
+	return (dn);
+}
+
+static void
+dnode_buf_pageout(dmu_buf_t *db, void *arg)
+{
+	dnode_children_t *children_dnodes = arg;
+	int i;
+	int epb = db->db_size >> DNODE_SHIFT;
+
+	ASSERT(epb == children_dnodes->dnc_count);
+
+	for (i = 0; i < epb; i++) {
+		dnode_handle_t *dnh = &children_dnodes->dnc_children[i];
+		dnode_t *dn;
+
+		/*
+		 * The dnode handle lock guards against the dnode moving to
+		 * another valid address, so there is no need here to guard
+		 * against changes to or from NULL.
+		 */
+		if (dnh->dnh_dnode == NULL) {
+			zrl_destroy(&dnh->dnh_zrlock);
+			continue;
+		}
+
+		zrl_add(&dnh->dnh_zrlock);
+		dn = dnh->dnh_dnode;
+		/*
+		 * If there are holds on this dnode, then there should
+		 * be holds on the dnode's containing dbuf as well; thus
+		 * it wouldn't be eligible for eviction and this function
+		 * would not have been called.
+		 */
+		ASSERT(refcount_is_zero(&dn->dn_holds));
+		ASSERT(refcount_is_zero(&dn->dn_tx_holds));
+
+		dnode_destroy(dn); /* implicit zrl_remove() */
+		zrl_destroy(&dnh->dnh_zrlock);
+		dnh->dnh_dnode = NULL;
+	}
+	kmem_free(children_dnodes, sizeof (dnode_children_t) +
+	    (epb - 1) * sizeof (dnode_handle_t));
+}
+
+/*
+ * errors:
+ * EINVAL - invalid object number.
+ * EIO - i/o error.
+ * succeeds even for free dnodes.
+ */
+int
+dnode_hold_impl(objset_t *os, uint64_t object, int flag,
+    void *tag, dnode_t **dnp)
+{
+	int epb, idx, err;
+	int drop_struct_lock = FALSE;
+	int type;
+	uint64_t blk;
+	dnode_t *mdn, *dn;
+	dmu_buf_impl_t *db;
+	dnode_children_t *children_dnodes;
+	dnode_handle_t *dnh;
+
+	/*
+	 * If you are holding the spa config lock as writer, you shouldn't
+	 * be asking the DMU to do *anything* unless it's the root pool
+	 * which may require us to read from the root filesystem while
+	 * holding some (not all) of the locks as writer.
+	 */
+	ASSERT(spa_config_held(os->os_spa, SCL_ALL, RW_WRITER) == 0 ||
+	    (spa_is_root(os->os_spa) &&
+	    spa_config_held(os->os_spa, SCL_STATE, RW_WRITER)));
+
+	if (object == DMU_USERUSED_OBJECT || object == DMU_GROUPUSED_OBJECT) {
+		dn = (object == DMU_USERUSED_OBJECT) ?
+		    DMU_USERUSED_DNODE(os) : DMU_GROUPUSED_DNODE(os);
+		if (dn == NULL)
+			return (ENOENT);
+		type = dn->dn_type;
+		if ((flag & DNODE_MUST_BE_ALLOCATED) && type == DMU_OT_NONE)
+			return (ENOENT);
+		if ((flag & DNODE_MUST_BE_FREE) && type != DMU_OT_NONE)
+			return (EEXIST);
+		DNODE_VERIFY(dn);
+		(void) refcount_add(&dn->dn_holds, tag);
+		*dnp = dn;
+		return (0);
+	}
+
+	if (object == 0 || object >= DN_MAX_OBJECT)
+		return (EINVAL);
+
+	mdn = DMU_META_DNODE(os);
+	ASSERT(mdn->dn_object == DMU_META_DNODE_OBJECT);
+
+	DNODE_VERIFY(mdn);
+
+	if (!RW_WRITE_HELD(&mdn->dn_struct_rwlock)) {
+		rw_enter(&mdn->dn_struct_rwlock, RW_READER);
+		drop_struct_lock = TRUE;
+	}
+
+	blk = dbuf_whichblock(mdn, object * sizeof (dnode_phys_t));
+
+	db = dbuf_hold(mdn, blk, FTAG);
+	if (drop_struct_lock)
+		rw_exit(&mdn->dn_struct_rwlock);
+	if (db == NULL)
+		return (EIO);
+	err = dbuf_read(db, NULL, DB_RF_CANFAIL);
+	if (err) {
+		dbuf_rele(db, FTAG);
+		return (err);
+	}
+
+	ASSERT3U(db->db.db_size, >=, 1<<DNODE_SHIFT);
+	epb = db->db.db_size >> DNODE_SHIFT;
+
+	idx = object & (epb-1);
+
+	ASSERT(DB_DNODE(db)->dn_type == DMU_OT_DNODE);
+	children_dnodes = dmu_buf_get_user(&db->db);
+	if (children_dnodes == NULL) {
+		int i;
+		dnode_children_t *winner;
+		children_dnodes = kmem_alloc(sizeof (dnode_children_t) +
+		    (epb - 1) * sizeof (dnode_handle_t), KM_SLEEP);
+		children_dnodes->dnc_count = epb;
+		dnh = &children_dnodes->dnc_children[0];
+		for (i = 0; i < epb; i++) {
+			zrl_init(&dnh[i].dnh_zrlock);
+			dnh[i].dnh_dnode = NULL;
+		}
+		if (winner = dmu_buf_set_user(&db->db, children_dnodes, NULL,
+		    dnode_buf_pageout)) {
+			kmem_free(children_dnodes, sizeof (dnode_children_t) +
+			    (epb - 1) * sizeof (dnode_handle_t));
+			children_dnodes = winner;
+		}
+	}
+	ASSERT(children_dnodes->dnc_count == epb);
+
+	dnh = &children_dnodes->dnc_children[idx];
+	zrl_add(&dnh->dnh_zrlock);
+	if ((dn = dnh->dnh_dnode) == NULL) {
+		dnode_phys_t *phys = (dnode_phys_t *)db->db.db_data+idx;
+		dnode_t *winner;
+
+		dn = dnode_create(os, phys, db, object, dnh);
+		winner = atomic_cas_ptr(&dnh->dnh_dnode, NULL, dn);
+		if (winner != NULL) {
+			zrl_add(&dnh->dnh_zrlock);
+			dnode_destroy(dn); /* implicit zrl_remove() */
+			dn = winner;
+		}
+	}
+
+	mutex_enter(&dn->dn_mtx);
+	type = dn->dn_type;
+	if (dn->dn_free_txg ||
+	    ((flag & DNODE_MUST_BE_ALLOCATED) && type == DMU_OT_NONE) ||
+	    ((flag & DNODE_MUST_BE_FREE) &&
+	    (type != DMU_OT_NONE || !refcount_is_zero(&dn->dn_holds)))) {
+		mutex_exit(&dn->dn_mtx);
+		zrl_remove(&dnh->dnh_zrlock);
+		dbuf_rele(db, FTAG);
+		return (type == DMU_OT_NONE ? ENOENT : EEXIST);
+	}
+	mutex_exit(&dn->dn_mtx);
+
+	if (refcount_add(&dn->dn_holds, tag) == 1)
+		dbuf_add_ref(db, dnh);
+	/* Now we can rely on the hold to prevent the dnode from moving. */
+	zrl_remove(&dnh->dnh_zrlock);
+
+	DNODE_VERIFY(dn);
+	ASSERT3P(dn->dn_dbuf, ==, db);
+	ASSERT3U(dn->dn_object, ==, object);
+	dbuf_rele(db, FTAG);
+
+	*dnp = dn;
+	return (0);
+}
+
+/*
+ * Return held dnode if the object is allocated, NULL if not.
+ */
+int
+dnode_hold(objset_t *os, uint64_t object, void *tag, dnode_t **dnp)
+{
+	return (dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED, tag, dnp));
+}
+
+/*
+ * Can only add a reference if there is already at least one
+ * reference on the dnode.  Returns FALSE if unable to add a
+ * new reference.
+ */
+boolean_t
+dnode_add_ref(dnode_t *dn, void *tag)
+{
+	mutex_enter(&dn->dn_mtx);
+	if (refcount_is_zero(&dn->dn_holds)) {
+		mutex_exit(&dn->dn_mtx);
+		return (FALSE);
+	}
+	VERIFY(1 < refcount_add(&dn->dn_holds, tag));
+	mutex_exit(&dn->dn_mtx);
+	return (TRUE);
+}
+
+void
+dnode_rele(dnode_t *dn, void *tag)
+{
+	uint64_t refs;
+	/* Get while the hold prevents the dnode from moving. */
+	dmu_buf_impl_t *db = dn->dn_dbuf;
+	dnode_handle_t *dnh = dn->dn_handle;
+
+	mutex_enter(&dn->dn_mtx);
+	refs = refcount_remove(&dn->dn_holds, tag);
+	mutex_exit(&dn->dn_mtx);
+
+	/*
+	 * It's unsafe to release the last hold on a dnode by dnode_rele() or
+	 * indirectly by dbuf_rele() while relying on the dnode handle to
+	 * prevent the dnode from moving, since releasing the last hold could
+	 * result in the dnode's parent dbuf evicting its dnode handles. For
+	 * that reason anyone calling dnode_rele() or dbuf_rele() without some
+	 * other direct or indirect hold on the dnode must first drop the dnode
+	 * handle.
+	 */
+	ASSERT(refs > 0 || dnh->dnh_zrlock.zr_owner != curthread);
+
+	/* NOTE: the DNODE_DNODE does not have a dn_dbuf */
+	if (refs == 0 && db != NULL) {
+		/*
+		 * Another thread could add a hold to the dnode handle in
+		 * dnode_hold_impl() while holding the parent dbuf. Since the
+		 * hold on the parent dbuf prevents the handle from being
+		 * destroyed, the hold on the handle is OK. We can't yet assert
+		 * that the handle has zero references, but that will be
+		 * asserted anyway when the handle gets destroyed.
+		 */
+		dbuf_rele(db, dnh);
+	}
+}
+
+void
+dnode_setdirty(dnode_t *dn, dmu_tx_t *tx)
+{
+	objset_t *os = dn->dn_objset;
+	uint64_t txg = tx->tx_txg;
+
+	if (DMU_OBJECT_IS_SPECIAL(dn->dn_object)) {
+		dsl_dataset_dirty(os->os_dsl_dataset, tx);
+		return;
+	}
+
+	DNODE_VERIFY(dn);
+
+#ifdef ZFS_DEBUG
+	mutex_enter(&dn->dn_mtx);
+	ASSERT(dn->dn_phys->dn_type || dn->dn_allocated_txg);
+	ASSERT(dn->dn_free_txg == 0 || dn->dn_free_txg >= txg);
+	mutex_exit(&dn->dn_mtx);
+#endif
+
+	/*
+	 * Determine old uid/gid when necessary
+	 */
+	dmu_objset_userquota_get_ids(dn, B_TRUE, tx);
+
+	mutex_enter(&os->os_lock);
+
+	/*
+	 * If we are already marked dirty, we're done.
+	 */
+	if (list_link_active(&dn->dn_dirty_link[txg & TXG_MASK])) {
+		mutex_exit(&os->os_lock);
+		return;
+	}
+
+	ASSERT(!refcount_is_zero(&dn->dn_holds) || list_head(&dn->dn_dbufs));
+	ASSERT(dn->dn_datablksz != 0);
+	ASSERT3U(dn->dn_next_bonuslen[txg&TXG_MASK], ==, 0);
+	ASSERT3U(dn->dn_next_blksz[txg&TXG_MASK], ==, 0);
+	ASSERT3U(dn->dn_next_bonustype[txg&TXG_MASK], ==, 0);
+
+	dprintf_ds(os->os_dsl_dataset, "obj=%llu txg=%llu\n",
+	    dn->dn_object, txg);
+
+	if (dn->dn_free_txg > 0 && dn->dn_free_txg <= txg) {
+		list_insert_tail(&os->os_free_dnodes[txg&TXG_MASK], dn);
+	} else {
+		list_insert_tail(&os->os_dirty_dnodes[txg&TXG_MASK], dn);
+	}
+
+	mutex_exit(&os->os_lock);
+
+	/*
+	 * The dnode maintains a hold on its containing dbuf as
+	 * long as there are holds on it.  Each instantiated child
+	 * dbuf maintains a hold on the dnode.  When the last child
+	 * drops its hold, the dnode will drop its hold on the
+	 * containing dbuf. We add a "dirty hold" here so that the
+	 * dnode will hang around after we finish processing its
+	 * children.
+	 */
+	VERIFY(dnode_add_ref(dn, (void *)(uintptr_t)tx->tx_txg));
+
+	(void) dbuf_dirty(dn->dn_dbuf, tx);
+
+	dsl_dataset_dirty(os->os_dsl_dataset, tx);
+}
+
+void
+dnode_free(dnode_t *dn, dmu_tx_t *tx)
+{
+	int txgoff = tx->tx_txg & TXG_MASK;
+
+	dprintf("dn=%p txg=%llu\n", dn, tx->tx_txg);
+
+	/* we should be the only holder... hopefully */
+	/* ASSERT3U(refcount_count(&dn->dn_holds), ==, 1); */
+
+	mutex_enter(&dn->dn_mtx);
+	if (dn->dn_type == DMU_OT_NONE || dn->dn_free_txg) {
+		mutex_exit(&dn->dn_mtx);
+		return;
+	}
+	dn->dn_free_txg = tx->tx_txg;
+	mutex_exit(&dn->dn_mtx);
+
+	/*
+	 * If the dnode is already dirty, it needs to be moved from
+	 * the dirty list to the free list.
+	 */
+	mutex_enter(&dn->dn_objset->os_lock);
+	if (list_link_active(&dn->dn_dirty_link[txgoff])) {
+		list_remove(&dn->dn_objset->os_dirty_dnodes[txgoff], dn);
+		list_insert_tail(&dn->dn_objset->os_free_dnodes[txgoff], dn);
+		mutex_exit(&dn->dn_objset->os_lock);
+	} else {
+		mutex_exit(&dn->dn_objset->os_lock);
+		dnode_setdirty(dn, tx);
+	}
+}
+
+/*
+ * Try to change the block size for the indicated dnode.  This can only
+ * succeed if there are no blocks allocated or dirty beyond first block
+ */
+int
+dnode_set_blksz(dnode_t *dn, uint64_t size, int ibs, dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *db, *db_next;
+	int err;
+
+	if (size == 0)
+		size = SPA_MINBLOCKSIZE;
+	if (size > SPA_MAXBLOCKSIZE)
+		size = SPA_MAXBLOCKSIZE;
+	else
+		size = P2ROUNDUP(size, SPA_MINBLOCKSIZE);
+
+	if (ibs == dn->dn_indblkshift)
+		ibs = 0;
+
+	if (size >> SPA_MINBLOCKSHIFT == dn->dn_datablkszsec && ibs == 0)
+		return (0);
+
+	rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+
+	/* Check for any allocated blocks beyond the first */
+	if (dn->dn_phys->dn_maxblkid != 0)
+		goto fail;
+
+	mutex_enter(&dn->dn_dbufs_mtx);
+	for (db = list_head(&dn->dn_dbufs); db; db = db_next) {
+		db_next = list_next(&dn->dn_dbufs, db);
+
+		if (db->db_blkid != 0 && db->db_blkid != DMU_BONUS_BLKID &&
+		    db->db_blkid != DMU_SPILL_BLKID) {
+			mutex_exit(&dn->dn_dbufs_mtx);
+			goto fail;
+		}
+	}
+	mutex_exit(&dn->dn_dbufs_mtx);
+
+	if (ibs && dn->dn_nlevels != 1)
+		goto fail;
+
+	/* resize the old block */
+	err = dbuf_hold_impl(dn, 0, 0, TRUE, FTAG, &db);
+	if (err == 0)
+		dbuf_new_size(db, size, tx);
+	else if (err != ENOENT)
+		goto fail;
+
+	dnode_setdblksz(dn, size);
+	dnode_setdirty(dn, tx);
+	dn->dn_next_blksz[tx->tx_txg&TXG_MASK] = size;
+	if (ibs) {
+		dn->dn_indblkshift = ibs;
+		dn->dn_next_indblkshift[tx->tx_txg&TXG_MASK] = ibs;
+	}
+	/* rele after we have fixed the blocksize in the dnode */
+	if (db)
+		dbuf_rele(db, FTAG);
+
+	rw_exit(&dn->dn_struct_rwlock);
+	return (0);
+
+fail:
+	rw_exit(&dn->dn_struct_rwlock);
+	return (ENOTSUP);
+}
+
+/* read-holding callers must not rely on the lock being continuously held */
+void
+dnode_new_blkid(dnode_t *dn, uint64_t blkid, dmu_tx_t *tx, boolean_t have_read)
+{
+	uint64_t txgoff = tx->tx_txg & TXG_MASK;
+	int epbs, new_nlevels;
+	uint64_t sz;
+
+	ASSERT(blkid != DMU_BONUS_BLKID);
+
+	ASSERT(have_read ?
+	    RW_READ_HELD(&dn->dn_struct_rwlock) :
+	    RW_WRITE_HELD(&dn->dn_struct_rwlock));
+
+	/*
+	 * if we have a read-lock, check to see if we need to do any work
+	 * before upgrading to a write-lock.
+	 */
+	if (have_read) {
+		if (blkid <= dn->dn_maxblkid)
+			return;
+
+		if (!rw_tryupgrade(&dn->dn_struct_rwlock)) {
+			rw_exit(&dn->dn_struct_rwlock);
+			rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+		}
+	}
+
+	if (blkid <= dn->dn_maxblkid)
+		goto out;
+
+	dn->dn_maxblkid = blkid;
+
+	/*
+	 * Compute the number of levels necessary to support the new maxblkid.
+	 */
+	new_nlevels = 1;
+	epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
+	for (sz = dn->dn_nblkptr;
+	    sz <= blkid && sz >= dn->dn_nblkptr; sz <<= epbs)
+		new_nlevels++;
+
+	if (new_nlevels > dn->dn_nlevels) {
+		int old_nlevels = dn->dn_nlevels;
+		dmu_buf_impl_t *db;
+		list_t *list;
+		dbuf_dirty_record_t *new, *dr, *dr_next;
+
+		dn->dn_nlevels = new_nlevels;
+
+		ASSERT3U(new_nlevels, >, dn->dn_next_nlevels[txgoff]);
+		dn->dn_next_nlevels[txgoff] = new_nlevels;
+
+		/* dirty the left indirects */
+		db = dbuf_hold_level(dn, old_nlevels, 0, FTAG);
+		ASSERT(db != NULL);
+		new = dbuf_dirty(db, tx);
+		dbuf_rele(db, FTAG);
+
+		/* transfer the dirty records to the new indirect */
+		mutex_enter(&dn->dn_mtx);
+		mutex_enter(&new->dt.di.dr_mtx);
+		list = &dn->dn_dirty_records[txgoff];
+		for (dr = list_head(list); dr; dr = dr_next) {
+			dr_next = list_next(&dn->dn_dirty_records[txgoff], dr);
+			if (dr->dr_dbuf->db_level != new_nlevels-1 &&
+			    dr->dr_dbuf->db_blkid != DMU_BONUS_BLKID &&
+			    dr->dr_dbuf->db_blkid != DMU_SPILL_BLKID) {
+				ASSERT(dr->dr_dbuf->db_level == old_nlevels-1);
+				list_remove(&dn->dn_dirty_records[txgoff], dr);
+				list_insert_tail(&new->dt.di.dr_children, dr);
+				dr->dr_parent = new;
+			}
+		}
+		mutex_exit(&new->dt.di.dr_mtx);
+		mutex_exit(&dn->dn_mtx);
+	}
+
+out:
+	if (have_read)
+		rw_downgrade(&dn->dn_struct_rwlock);
+}
+
+void
+dnode_clear_range(dnode_t *dn, uint64_t blkid, uint64_t nblks, dmu_tx_t *tx)
+{
+	avl_tree_t *tree = &dn->dn_ranges[tx->tx_txg&TXG_MASK];
+	avl_index_t where;
+	free_range_t *rp;
+	free_range_t rp_tofind;
+	uint64_t endblk = blkid + nblks;
+
+	ASSERT(MUTEX_HELD(&dn->dn_mtx));
+	ASSERT(nblks <= UINT64_MAX - blkid); /* no overflow */
+
+	dprintf_dnode(dn, "blkid=%llu nblks=%llu txg=%llu\n",
+	    blkid, nblks, tx->tx_txg);
+	rp_tofind.fr_blkid = blkid;
+	rp = avl_find(tree, &rp_tofind, &where);
+	if (rp == NULL)
+		rp = avl_nearest(tree, where, AVL_BEFORE);
+	if (rp == NULL)
+		rp = avl_nearest(tree, where, AVL_AFTER);
+
+	while (rp && (rp->fr_blkid <= blkid + nblks)) {
+		uint64_t fr_endblk = rp->fr_blkid + rp->fr_nblks;
+		free_range_t *nrp = AVL_NEXT(tree, rp);
+
+		if (blkid <= rp->fr_blkid && endblk >= fr_endblk) {
+			/* clear this entire range */
+			avl_remove(tree, rp);
+			kmem_free(rp, sizeof (free_range_t));
+		} else if (blkid <= rp->fr_blkid &&
+		    endblk > rp->fr_blkid && endblk < fr_endblk) {
+			/* clear the beginning of this range */
+			rp->fr_blkid = endblk;
+			rp->fr_nblks = fr_endblk - endblk;
+		} else if (blkid > rp->fr_blkid && blkid < fr_endblk &&
+		    endblk >= fr_endblk) {
+			/* clear the end of this range */
+			rp->fr_nblks = blkid - rp->fr_blkid;
+		} else if (blkid > rp->fr_blkid && endblk < fr_endblk) {
+			/* clear a chunk out of this range */
+			free_range_t *new_rp =
+			    kmem_alloc(sizeof (free_range_t), KM_SLEEP);
+
+			new_rp->fr_blkid = endblk;
+			new_rp->fr_nblks = fr_endblk - endblk;
+			avl_insert_here(tree, new_rp, rp, AVL_AFTER);
+			rp->fr_nblks = blkid - rp->fr_blkid;
+		}
+		/* there may be no overlap */
+		rp = nrp;
+	}
+}
+
+void
+dnode_free_range(dnode_t *dn, uint64_t off, uint64_t len, dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *db;
+	uint64_t blkoff, blkid, nblks;
+	int blksz, blkshift, head, tail;
+	int trunc = FALSE;
+	int epbs;
+
+	rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+	blksz = dn->dn_datablksz;
+	blkshift = dn->dn_datablkshift;
+	epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
+
+	if (len == -1ULL) {
+		len = UINT64_MAX - off;
+		trunc = TRUE;
+	}
+
+	/*
+	 * First, block align the region to free:
+	 */
+	if (ISP2(blksz)) {
+		head = P2NPHASE(off, blksz);
+		blkoff = P2PHASE(off, blksz);
+		if ((off >> blkshift) > dn->dn_maxblkid)
+			goto out;
+	} else {
+		ASSERT(dn->dn_maxblkid == 0);
+		if (off == 0 && len >= blksz) {
+			/* Freeing the whole block; fast-track this request */
+			blkid = 0;
+			nblks = 1;
+			goto done;
+		} else if (off >= blksz) {
+			/* Freeing past end-of-data */
+			goto out;
+		} else {
+			/* Freeing part of the block. */
+			head = blksz - off;
+			ASSERT3U(head, >, 0);
+		}
+		blkoff = off;
+	}
+	/* zero out any partial block data at the start of the range */
+	if (head) {
+		ASSERT3U(blkoff + head, ==, blksz);
+		if (len < head)
+			head = len;
+		if (dbuf_hold_impl(dn, 0, dbuf_whichblock(dn, off), TRUE,
+		    FTAG, &db) == 0) {
+			caddr_t data;
+
+			/* don't dirty if it isn't on disk and isn't dirty */
+			if (db->db_last_dirty ||
+			    (db->db_blkptr && !BP_IS_HOLE(db->db_blkptr))) {
+				rw_exit(&dn->dn_struct_rwlock);
+				dbuf_will_dirty(db, tx);
+				rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+				data = db->db.db_data;
+				bzero(data + blkoff, head);
+			}
+			dbuf_rele(db, FTAG);
+		}
+		off += head;
+		len -= head;
+	}
+
+	/* If the range was less than one block, we're done */
+	if (len == 0)
+		goto out;
+
+	/* If the remaining range is past end of file, we're done */
+	if ((off >> blkshift) > dn->dn_maxblkid)
+		goto out;
+
+	ASSERT(ISP2(blksz));
+	if (trunc)
+		tail = 0;
+	else
+		tail = P2PHASE(len, blksz);
+
+	ASSERT3U(P2PHASE(off, blksz), ==, 0);
+	/* zero out any partial block data at the end of the range */
+	if (tail) {
+		if (len < tail)
+			tail = len;
+		if (dbuf_hold_impl(dn, 0, dbuf_whichblock(dn, off+len),
+		    TRUE, FTAG, &db) == 0) {
+			/* don't dirty if not on disk and not dirty */
+			if (db->db_last_dirty ||
+			    (db->db_blkptr && !BP_IS_HOLE(db->db_blkptr))) {
+				rw_exit(&dn->dn_struct_rwlock);
+				dbuf_will_dirty(db, tx);
+				rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+				bzero(db->db.db_data, tail);
+			}
+			dbuf_rele(db, FTAG);
+		}
+		len -= tail;
+	}
+
+	/* If the range did not include a full block, we are done */
+	if (len == 0)
+		goto out;
+
+	ASSERT(IS_P2ALIGNED(off, blksz));
+	ASSERT(trunc || IS_P2ALIGNED(len, blksz));
+	blkid = off >> blkshift;
+	nblks = len >> blkshift;
+	if (trunc)
+		nblks += 1;
+
+	/*
+	 * Read in and mark all the level-1 indirects dirty,
+	 * so that they will stay in memory until syncing phase.
+	 * Always dirty the first and last indirect to make sure
+	 * we dirty all the partial indirects.
+	 */
+	if (dn->dn_nlevels > 1) {
+		uint64_t i, first, last;
+		int shift = epbs + dn->dn_datablkshift;
+
+		first = blkid >> epbs;
+		if (db = dbuf_hold_level(dn, 1, first, FTAG)) {
+			dbuf_will_dirty(db, tx);
+			dbuf_rele(db, FTAG);
+		}
+		if (trunc)
+			last = dn->dn_maxblkid >> epbs;
+		else
+			last = (blkid + nblks - 1) >> epbs;
+		if (last > first && (db = dbuf_hold_level(dn, 1, last, FTAG))) {
+			dbuf_will_dirty(db, tx);
+			dbuf_rele(db, FTAG);
+		}
+		for (i = first + 1; i < last; i++) {
+			uint64_t ibyte = i << shift;
+			int err;
+
+			err = dnode_next_offset(dn,
+			    DNODE_FIND_HAVELOCK, &ibyte, 1, 1, 0);
+			i = ibyte >> shift;
+			if (err == ESRCH || i >= last)
+				break;
+			ASSERT(err == 0);
+			db = dbuf_hold_level(dn, 1, i, FTAG);
+			if (db) {
+				dbuf_will_dirty(db, tx);
+				dbuf_rele(db, FTAG);
+			}
+		}
+	}
+done:
+	/*
+	 * Add this range to the dnode range list.
+	 * We will finish up this free operation in the syncing phase.
+	 */
+	mutex_enter(&dn->dn_mtx);
+	dnode_clear_range(dn, blkid, nblks, tx);
+	{
+		free_range_t *rp, *found;
+		avl_index_t where;
+		avl_tree_t *tree = &dn->dn_ranges[tx->tx_txg&TXG_MASK];
+
+		/* Add new range to dn_ranges */
+		rp = kmem_alloc(sizeof (free_range_t), KM_SLEEP);
+		rp->fr_blkid = blkid;
+		rp->fr_nblks = nblks;
+		found = avl_find(tree, rp, &where);
+		ASSERT(found == NULL);
+		avl_insert(tree, rp, where);
+		dprintf_dnode(dn, "blkid=%llu nblks=%llu txg=%llu\n",
+		    blkid, nblks, tx->tx_txg);
+	}
+	mutex_exit(&dn->dn_mtx);
+
+	dbuf_free_range(dn, blkid, blkid + nblks - 1, tx);
+	dnode_setdirty(dn, tx);
+out:
+	if (trunc && dn->dn_maxblkid >= (off >> blkshift))
+		dn->dn_maxblkid = (off >> blkshift ? (off >> blkshift) - 1 : 0);
+
+	rw_exit(&dn->dn_struct_rwlock);
+}
+
+static boolean_t
+dnode_spill_freed(dnode_t *dn)
+{
+	int i;
+
+	mutex_enter(&dn->dn_mtx);
+	for (i = 0; i < TXG_SIZE; i++) {
+		if (dn->dn_rm_spillblk[i] == DN_KILL_SPILLBLK)
+			break;
+	}
+	mutex_exit(&dn->dn_mtx);
+	return (i < TXG_SIZE);
+}
+
+/* return TRUE if this blkid was freed in a recent txg, or FALSE if it wasn't */
+uint64_t
+dnode_block_freed(dnode_t *dn, uint64_t blkid)
+{
+	free_range_t range_tofind;
+	void *dp = spa_get_dsl(dn->dn_objset->os_spa);
+	int i;
+
+	if (blkid == DMU_BONUS_BLKID)
+		return (FALSE);
+
+	/*
+	 * If we're in the process of opening the pool, dp will not be
+	 * set yet, but there shouldn't be anything dirty.
+	 */
+	if (dp == NULL)
+		return (FALSE);
+
+	if (dn->dn_free_txg)
+		return (TRUE);
+
+	if (blkid == DMU_SPILL_BLKID)
+		return (dnode_spill_freed(dn));
+
+	range_tofind.fr_blkid = blkid;
+	mutex_enter(&dn->dn_mtx);
+	for (i = 0; i < TXG_SIZE; i++) {
+		free_range_t *range_found;
+		avl_index_t idx;
+
+		range_found = avl_find(&dn->dn_ranges[i], &range_tofind, &idx);
+		if (range_found) {
+			ASSERT(range_found->fr_nblks > 0);
+			break;
+		}
+		range_found = avl_nearest(&dn->dn_ranges[i], idx, AVL_BEFORE);
+		if (range_found &&
+		    range_found->fr_blkid + range_found->fr_nblks > blkid)
+			break;
+	}
+	mutex_exit(&dn->dn_mtx);
+	return (i < TXG_SIZE);
+}
+
+/* call from syncing context when we actually write/free space for this dnode */
+void
+dnode_diduse_space(dnode_t *dn, int64_t delta)
+{
+	uint64_t space;
+	dprintf_dnode(dn, "dn=%p dnp=%p used=%llu delta=%lld\n",
+	    dn, dn->dn_phys,
+	    (u_longlong_t)dn->dn_phys->dn_used,
+	    (longlong_t)delta);
+
+	mutex_enter(&dn->dn_mtx);
+	space = DN_USED_BYTES(dn->dn_phys);
+	if (delta > 0) {
+		ASSERT3U(space + delta, >=, space); /* no overflow */
+	} else {
+		ASSERT3U(space, >=, -delta); /* no underflow */
+	}
+	space += delta;
+	if (spa_version(dn->dn_objset->os_spa) < SPA_VERSION_DNODE_BYTES) {
+		ASSERT((dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) == 0);
+		ASSERT3U(P2PHASE(space, 1<<DEV_BSHIFT), ==, 0);
+		dn->dn_phys->dn_used = space >> DEV_BSHIFT;
+	} else {
+		dn->dn_phys->dn_used = space;
+		dn->dn_phys->dn_flags |= DNODE_FLAG_USED_BYTES;
+	}
+	mutex_exit(&dn->dn_mtx);
+}
+
+/*
+ * Call when we think we're going to write/free space in open context.
+ * Be conservative (ie. OK to write less than this or free more than
+ * this, but don't write more or free less).
+ */
+void
+dnode_willuse_space(dnode_t *dn, int64_t space, dmu_tx_t *tx)
+{
+	objset_t *os = dn->dn_objset;
+	dsl_dataset_t *ds = os->os_dsl_dataset;
+
+	if (space > 0)
+		space = spa_get_asize(os->os_spa, space);
+
+	if (ds)
+		dsl_dir_willuse_space(ds->ds_dir, space, tx);
+
+	dmu_tx_willuse_space(tx, space);
+}
+
+/*
+ * This function scans a block at the indicated "level" looking for
+ * a hole or data (depending on 'flags').  If level > 0, then we are
+ * scanning an indirect block looking at its pointers.  If level == 0,
+ * then we are looking at a block of dnodes.  If we don't find what we
+ * are looking for in the block, we return ESRCH.  Otherwise, return
+ * with *offset pointing to the beginning (if searching forwards) or
+ * end (if searching backwards) of the range covered by the block
+ * pointer we matched on (or dnode).
+ *
+ * The basic search algorithm used below by dnode_next_offset() is to
+ * use this function to search up the block tree (widen the search) until
+ * we find something (i.e., we don't return ESRCH) and then search back
+ * down the tree (narrow the search) until we reach our original search
+ * level.
+ */
+static int
+dnode_next_offset_level(dnode_t *dn, int flags, uint64_t *offset,
+	int lvl, uint64_t blkfill, uint64_t txg)
+{
+	dmu_buf_impl_t *db = NULL;
+	void *data = NULL;
+	uint64_t epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT;
+	uint64_t epb = 1ULL << epbs;
+	uint64_t minfill, maxfill;
+	boolean_t hole;
+	int i, inc, error, span;
+
+	dprintf("probing object %llu offset %llx level %d of %u\n",
+	    dn->dn_object, *offset, lvl, dn->dn_phys->dn_nlevels);
+
+	hole = ((flags & DNODE_FIND_HOLE) != 0);
+	inc = (flags & DNODE_FIND_BACKWARDS) ? -1 : 1;
+	ASSERT(txg == 0 || !hole);
+
+	if (lvl == dn->dn_phys->dn_nlevels) {
+		error = 0;
+		epb = dn->dn_phys->dn_nblkptr;
+		data = dn->dn_phys->dn_blkptr;
+	} else {
+		uint64_t blkid = dbuf_whichblock(dn, *offset) >> (epbs * lvl);
+		error = dbuf_hold_impl(dn, lvl, blkid, TRUE, FTAG, &db);
+		if (error) {
+			if (error != ENOENT)
+				return (error);
+			if (hole)
+				return (0);
+			/*
+			 * This can only happen when we are searching up
+			 * the block tree for data.  We don't really need to
+			 * adjust the offset, as we will just end up looking
+			 * at the pointer to this block in its parent, and its
+			 * going to be unallocated, so we will skip over it.
+			 */
+			return (ESRCH);
+		}
+		error = dbuf_read(db, NULL, DB_RF_CANFAIL | DB_RF_HAVESTRUCT);
+		if (error) {
+			dbuf_rele(db, FTAG);
+			return (error);
+		}
+		data = db->db.db_data;
+	}
+
+	if (db && txg &&
+	    (db->db_blkptr == NULL || db->db_blkptr->blk_birth <= txg)) {
+		/*
+		 * This can only happen when we are searching up the tree
+		 * and these conditions mean that we need to keep climbing.
+		 */
+		error = ESRCH;
+	} else if (lvl == 0) {
+		dnode_phys_t *dnp = data;
+		span = DNODE_SHIFT;
+		ASSERT(dn->dn_type == DMU_OT_DNODE);
+
+		for (i = (*offset >> span) & (blkfill - 1);
+		    i >= 0 && i < blkfill; i += inc) {
+			if ((dnp[i].dn_type == DMU_OT_NONE) == hole)
+				break;
+			*offset += (1ULL << span) * inc;
+		}
+		if (i < 0 || i == blkfill)
+			error = ESRCH;
+	} else {
+		blkptr_t *bp = data;
+		uint64_t start = *offset;
+		span = (lvl - 1) * epbs + dn->dn_datablkshift;
+		minfill = 0;
+		maxfill = blkfill << ((lvl - 1) * epbs);
+
+		if (hole)
+			maxfill--;
+		else
+			minfill++;
+
+		*offset = *offset >> span;
+		for (i = BF64_GET(*offset, 0, epbs);
+		    i >= 0 && i < epb; i += inc) {
+			if (bp[i].blk_fill >= minfill &&
+			    bp[i].blk_fill <= maxfill &&
+			    (hole || bp[i].blk_birth > txg))
+				break;
+			if (inc > 0 || *offset > 0)
+				*offset += inc;
+		}
+		*offset = *offset << span;
+		if (inc < 0) {
+			/* traversing backwards; position offset at the end */
+			ASSERT3U(*offset, <=, start);
+			*offset = MIN(*offset + (1ULL << span) - 1, start);
+		} else if (*offset < start) {
+			*offset = start;
+		}
+		if (i < 0 || i >= epb)
+			error = ESRCH;
+	}
+
+	if (db)
+		dbuf_rele(db, FTAG);
+
+	return (error);
+}
+
+/*
+ * Find the next hole, data, or sparse region at or after *offset.
+ * The value 'blkfill' tells us how many items we expect to find
+ * in an L0 data block; this value is 1 for normal objects,
+ * DNODES_PER_BLOCK for the meta dnode, and some fraction of
+ * DNODES_PER_BLOCK when searching for sparse regions thereof.
+ *
+ * Examples:
+ *
+ * dnode_next_offset(dn, flags, offset, 1, 1, 0);
+ *	Finds the next/previous hole/data in a file.
+ *	Used in dmu_offset_next().
+ *
+ * dnode_next_offset(mdn, flags, offset, 0, DNODES_PER_BLOCK, txg);
+ *	Finds the next free/allocated dnode an objset's meta-dnode.
+ *	Only finds objects that have new contents since txg (ie.
+ *	bonus buffer changes and content removal are ignored).
+ *	Used in dmu_object_next().
+ *
+ * dnode_next_offset(mdn, DNODE_FIND_HOLE, offset, 2, DNODES_PER_BLOCK >> 2, 0);
+ *	Finds the next L2 meta-dnode bp that's at most 1/4 full.
+ *	Used in dmu_object_alloc().
+ */
+int
+dnode_next_offset(dnode_t *dn, int flags, uint64_t *offset,
+    int minlvl, uint64_t blkfill, uint64_t txg)
+{
+	uint64_t initial_offset = *offset;
+	int lvl, maxlvl;
+	int error = 0;
+
+	if (!(flags & DNODE_FIND_HAVELOCK))
+		rw_enter(&dn->dn_struct_rwlock, RW_READER);
+
+	if (dn->dn_phys->dn_nlevels == 0) {
+		error = ESRCH;
+		goto out;
+	}
+
+	if (dn->dn_datablkshift == 0) {
+		if (*offset < dn->dn_datablksz) {
+			if (flags & DNODE_FIND_HOLE)
+				*offset = dn->dn_datablksz;
+		} else {
+			error = ESRCH;
+		}
+		goto out;
+	}
+
+	maxlvl = dn->dn_phys->dn_nlevels;
+
+	for (lvl = minlvl; lvl <= maxlvl; lvl++) {
+		error = dnode_next_offset_level(dn,
+		    flags, offset, lvl, blkfill, txg);
+		if (error != ESRCH)
+			break;
+	}
+
+	while (error == 0 && --lvl >= minlvl) {
+		error = dnode_next_offset_level(dn,
+		    flags, offset, lvl, blkfill, txg);
+	}
+
+	if (error == 0 && (flags & DNODE_FIND_BACKWARDS ?
+	    initial_offset < *offset : initial_offset > *offset))
+		error = ESRCH;
+out:
+	if (!(flags & DNODE_FIND_HAVELOCK))
+		rw_exit(&dn->dn_struct_rwlock);
+
+	return (error);
+}
diff --git a/uts/common/fs/zfs/dnode_sync.c b/uts/common/fs/zfs/dnode_sync.c
new file mode 100644
index 000000000000..2ee990a3b32c
--- /dev/null
+++ b/uts/common/fs/zfs/dnode_sync.c
@@ -0,0 +1,693 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/dbuf.h>
+#include <sys/dnode.h>
+#include <sys/dmu.h>
+#include <sys/dmu_tx.h>
+#include <sys/dmu_objset.h>
+#include <sys/dsl_dataset.h>
+#include <sys/spa.h>
+
+static void
+dnode_increase_indirection(dnode_t *dn, dmu_tx_t *tx)
+{
+	dmu_buf_impl_t *db;
+	int txgoff = tx->tx_txg & TXG_MASK;
+	int nblkptr = dn->dn_phys->dn_nblkptr;
+	int old_toplvl = dn->dn_phys->dn_nlevels - 1;
+	int new_level = dn->dn_next_nlevels[txgoff];
+	int i;
+
+	rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+
+	/* this dnode can't be paged out because it's dirty */
+	ASSERT(dn->dn_phys->dn_type != DMU_OT_NONE);
+	ASSERT(RW_WRITE_HELD(&dn->dn_struct_rwlock));
+	ASSERT(new_level > 1 && dn->dn_phys->dn_nlevels > 0);
+
+	db = dbuf_hold_level(dn, dn->dn_phys->dn_nlevels, 0, FTAG);
+	ASSERT(db != NULL);
+
+	dn->dn_phys->dn_nlevels = new_level;
+	dprintf("os=%p obj=%llu, increase to %d\n", dn->dn_objset,
+	    dn->dn_object, dn->dn_phys->dn_nlevels);
+
+	/* check for existing blkptrs in the dnode */
+	for (i = 0; i < nblkptr; i++)
+		if (!BP_IS_HOLE(&dn->dn_phys->dn_blkptr[i]))
+			break;
+	if (i != nblkptr) {
+		/* transfer dnode's block pointers to new indirect block */
+		(void) dbuf_read(db, NULL, DB_RF_MUST_SUCCEED|DB_RF_HAVESTRUCT);
+		ASSERT(db->db.db_data);
+		ASSERT(arc_released(db->db_buf));
+		ASSERT3U(sizeof (blkptr_t) * nblkptr, <=, db->db.db_size);
+		bcopy(dn->dn_phys->dn_blkptr, db->db.db_data,
+		    sizeof (blkptr_t) * nblkptr);
+		arc_buf_freeze(db->db_buf);
+	}
+
+	/* set dbuf's parent pointers to new indirect buf */
+	for (i = 0; i < nblkptr; i++) {
+		dmu_buf_impl_t *child = dbuf_find(dn, old_toplvl, i);
+
+		if (child == NULL)
+			continue;
+#ifdef	DEBUG
+		DB_DNODE_ENTER(child);
+		ASSERT3P(DB_DNODE(child), ==, dn);
+		DB_DNODE_EXIT(child);
+#endif	/* DEBUG */
+		if (child->db_parent && child->db_parent != dn->dn_dbuf) {
+			ASSERT(child->db_parent->db_level == db->db_level);
+			ASSERT(child->db_blkptr !=
+			    &dn->dn_phys->dn_blkptr[child->db_blkid]);
+			mutex_exit(&child->db_mtx);
+			continue;
+		}
+		ASSERT(child->db_parent == NULL ||
+		    child->db_parent == dn->dn_dbuf);
+
+		child->db_parent = db;
+		dbuf_add_ref(db, child);
+		if (db->db.db_data)
+			child->db_blkptr = (blkptr_t *)db->db.db_data + i;
+		else
+			child->db_blkptr = NULL;
+		dprintf_dbuf_bp(child, child->db_blkptr,
+		    "changed db_blkptr to new indirect %s", "");
+
+		mutex_exit(&child->db_mtx);
+	}
+
+	bzero(dn->dn_phys->dn_blkptr, sizeof (blkptr_t) * nblkptr);
+
+	dbuf_rele(db, FTAG);
+
+	rw_exit(&dn->dn_struct_rwlock);
+}
+
+static int
+free_blocks(dnode_t *dn, blkptr_t *bp, int num, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset;
+	uint64_t bytesfreed = 0;
+	int i, blocks_freed = 0;
+
+	dprintf("ds=%p obj=%llx num=%d\n", ds, dn->dn_object, num);
+
+	for (i = 0; i < num; i++, bp++) {
+		if (BP_IS_HOLE(bp))
+			continue;
+
+		bytesfreed += dsl_dataset_block_kill(ds, bp, tx, B_FALSE);
+		ASSERT3U(bytesfreed, <=, DN_USED_BYTES(dn->dn_phys));
+		bzero(bp, sizeof (blkptr_t));
+		blocks_freed += 1;
+	}
+	dnode_diduse_space(dn, -bytesfreed);
+	return (blocks_freed);
+}
+
+#ifdef ZFS_DEBUG
+static void
+free_verify(dmu_buf_impl_t *db, uint64_t start, uint64_t end, dmu_tx_t *tx)
+{
+	int off, num;
+	int i, err, epbs;
+	uint64_t txg = tx->tx_txg;
+	dnode_t *dn;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT;
+	off = start - (db->db_blkid * 1<<epbs);
+	num = end - start + 1;
+
+	ASSERT3U(off, >=, 0);
+	ASSERT3U(num, >=, 0);
+	ASSERT3U(db->db_level, >, 0);
+	ASSERT3U(db->db.db_size, ==, 1 << dn->dn_phys->dn_indblkshift);
+	ASSERT3U(off+num, <=, db->db.db_size >> SPA_BLKPTRSHIFT);
+	ASSERT(db->db_blkptr != NULL);
+
+	for (i = off; i < off+num; i++) {
+		uint64_t *buf;
+		dmu_buf_impl_t *child;
+		dbuf_dirty_record_t *dr;
+		int j;
+
+		ASSERT(db->db_level == 1);
+
+		rw_enter(&dn->dn_struct_rwlock, RW_READER);
+		err = dbuf_hold_impl(dn, db->db_level-1,
+		    (db->db_blkid << epbs) + i, TRUE, FTAG, &child);
+		rw_exit(&dn->dn_struct_rwlock);
+		if (err == ENOENT)
+			continue;
+		ASSERT(err == 0);
+		ASSERT(child->db_level == 0);
+		dr = child->db_last_dirty;
+		while (dr && dr->dr_txg > txg)
+			dr = dr->dr_next;
+		ASSERT(dr == NULL || dr->dr_txg == txg);
+
+		/* data_old better be zeroed */
+		if (dr) {
+			buf = dr->dt.dl.dr_data->b_data;
+			for (j = 0; j < child->db.db_size >> 3; j++) {
+				if (buf[j] != 0) {
+					panic("freed data not zero: "
+					    "child=%p i=%d off=%d num=%d\n",
+					    (void *)child, i, off, num);
+				}
+			}
+		}
+
+		/*
+		 * db_data better be zeroed unless it's dirty in a
+		 * future txg.
+		 */
+		mutex_enter(&child->db_mtx);
+		buf = child->db.db_data;
+		if (buf != NULL && child->db_state != DB_FILL &&
+		    child->db_last_dirty == NULL) {
+			for (j = 0; j < child->db.db_size >> 3; j++) {
+				if (buf[j] != 0) {
+					panic("freed data not zero: "
+					    "child=%p i=%d off=%d num=%d\n",
+					    (void *)child, i, off, num);
+				}
+			}
+		}
+		mutex_exit(&child->db_mtx);
+
+		dbuf_rele(child, FTAG);
+	}
+	DB_DNODE_EXIT(db);
+}
+#endif
+
+#define	ALL -1
+
+static int
+free_children(dmu_buf_impl_t *db, uint64_t blkid, uint64_t nblks, int trunc,
+    dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	blkptr_t *bp;
+	dmu_buf_impl_t *subdb;
+	uint64_t start, end, dbstart, dbend, i;
+	int epbs, shift, err;
+	int all = TRUE;
+	int blocks_freed = 0;
+
+	/*
+	 * There is a small possibility that this block will not be cached:
+	 *   1 - if level > 1 and there are no children with level <= 1
+	 *   2 - if we didn't get a dirty hold (because this block had just
+	 *	 finished being written -- and so had no holds), and then this
+	 *	 block got evicted before we got here.
+	 */
+	if (db->db_state != DB_CACHED)
+		(void) dbuf_read(db, NULL, DB_RF_MUST_SUCCEED);
+
+	dbuf_release_bp(db);
+	bp = (blkptr_t *)db->db.db_data;
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT;
+	shift = (db->db_level - 1) * epbs;
+	dbstart = db->db_blkid << epbs;
+	start = blkid >> shift;
+	if (dbstart < start) {
+		bp += start - dbstart;
+		all = FALSE;
+	} else {
+		start = dbstart;
+	}
+	dbend = ((db->db_blkid + 1) << epbs) - 1;
+	end = (blkid + nblks - 1) >> shift;
+	if (dbend <= end)
+		end = dbend;
+	else if (all)
+		all = trunc;
+	ASSERT3U(start, <=, end);
+
+	if (db->db_level == 1) {
+		FREE_VERIFY(db, start, end, tx);
+		blocks_freed = free_blocks(dn, bp, end-start+1, tx);
+		arc_buf_freeze(db->db_buf);
+		ASSERT(all || blocks_freed == 0 || db->db_last_dirty);
+		DB_DNODE_EXIT(db);
+		return (all ? ALL : blocks_freed);
+	}
+
+	for (i = start; i <= end; i++, bp++) {
+		if (BP_IS_HOLE(bp))
+			continue;
+		rw_enter(&dn->dn_struct_rwlock, RW_READER);
+		err = dbuf_hold_impl(dn, db->db_level-1, i, TRUE, FTAG, &subdb);
+		ASSERT3U(err, ==, 0);
+		rw_exit(&dn->dn_struct_rwlock);
+
+		if (free_children(subdb, blkid, nblks, trunc, tx) == ALL) {
+			ASSERT3P(subdb->db_blkptr, ==, bp);
+			blocks_freed += free_blocks(dn, bp, 1, tx);
+		} else {
+			all = FALSE;
+		}
+		dbuf_rele(subdb, FTAG);
+	}
+	DB_DNODE_EXIT(db);
+	arc_buf_freeze(db->db_buf);
+#ifdef ZFS_DEBUG
+	bp -= (end-start)+1;
+	for (i = start; i <= end; i++, bp++) {
+		if (i == start && blkid != 0)
+			continue;
+		else if (i == end && !trunc)
+			continue;
+		ASSERT3U(bp->blk_birth, ==, 0);
+	}
+#endif
+	ASSERT(all || blocks_freed == 0 || db->db_last_dirty);
+	return (all ? ALL : blocks_freed);
+}
+
+/*
+ * free_range: Traverse the indicated range of the provided file
+ * and "free" all the blocks contained there.
+ */
+static void
+dnode_sync_free_range(dnode_t *dn, uint64_t blkid, uint64_t nblks, dmu_tx_t *tx)
+{
+	blkptr_t *bp = dn->dn_phys->dn_blkptr;
+	dmu_buf_impl_t *db;
+	int trunc, start, end, shift, i, err;
+	int dnlevel = dn->dn_phys->dn_nlevels;
+
+	if (blkid > dn->dn_phys->dn_maxblkid)
+		return;
+
+	ASSERT(dn->dn_phys->dn_maxblkid < UINT64_MAX);
+	trunc = blkid + nblks > dn->dn_phys->dn_maxblkid;
+	if (trunc)
+		nblks = dn->dn_phys->dn_maxblkid - blkid + 1;
+
+	/* There are no indirect blocks in the object */
+	if (dnlevel == 1) {
+		if (blkid >= dn->dn_phys->dn_nblkptr) {
+			/* this range was never made persistent */
+			return;
+		}
+		ASSERT3U(blkid + nblks, <=, dn->dn_phys->dn_nblkptr);
+		(void) free_blocks(dn, bp + blkid, nblks, tx);
+		if (trunc) {
+			uint64_t off = (dn->dn_phys->dn_maxblkid + 1) *
+			    (dn->dn_phys->dn_datablkszsec << SPA_MINBLOCKSHIFT);
+			dn->dn_phys->dn_maxblkid = (blkid ? blkid - 1 : 0);
+			ASSERT(off < dn->dn_phys->dn_maxblkid ||
+			    dn->dn_phys->dn_maxblkid == 0 ||
+			    dnode_next_offset(dn, 0, &off, 1, 1, 0) != 0);
+		}
+		return;
+	}
+
+	shift = (dnlevel - 1) * (dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT);
+	start = blkid >> shift;
+	ASSERT(start < dn->dn_phys->dn_nblkptr);
+	end = (blkid + nblks - 1) >> shift;
+	bp += start;
+	for (i = start; i <= end; i++, bp++) {
+		if (BP_IS_HOLE(bp))
+			continue;
+		rw_enter(&dn->dn_struct_rwlock, RW_READER);
+		err = dbuf_hold_impl(dn, dnlevel-1, i, TRUE, FTAG, &db);
+		ASSERT3U(err, ==, 0);
+		rw_exit(&dn->dn_struct_rwlock);
+
+		if (free_children(db, blkid, nblks, trunc, tx) == ALL) {
+			ASSERT3P(db->db_blkptr, ==, bp);
+			(void) free_blocks(dn, bp, 1, tx);
+		}
+		dbuf_rele(db, FTAG);
+	}
+	if (trunc) {
+		uint64_t off = (dn->dn_phys->dn_maxblkid + 1) *
+		    (dn->dn_phys->dn_datablkszsec << SPA_MINBLOCKSHIFT);
+		dn->dn_phys->dn_maxblkid = (blkid ? blkid - 1 : 0);
+		ASSERT(off < dn->dn_phys->dn_maxblkid ||
+		    dn->dn_phys->dn_maxblkid == 0 ||
+		    dnode_next_offset(dn, 0, &off, 1, 1, 0) != 0);
+	}
+}
+
+/*
+ * Try to kick all the dnodes dbufs out of the cache...
+ */
+void
+dnode_evict_dbufs(dnode_t *dn)
+{
+	int progress;
+	int pass = 0;
+
+	do {
+		dmu_buf_impl_t *db, marker;
+		int evicting = FALSE;
+
+		progress = FALSE;
+		mutex_enter(&dn->dn_dbufs_mtx);
+		list_insert_tail(&dn->dn_dbufs, &marker);
+		db = list_head(&dn->dn_dbufs);
+		for (; db != &marker; db = list_head(&dn->dn_dbufs)) {
+			list_remove(&dn->dn_dbufs, db);
+			list_insert_tail(&dn->dn_dbufs, db);
+#ifdef	DEBUG
+			DB_DNODE_ENTER(db);
+			ASSERT3P(DB_DNODE(db), ==, dn);
+			DB_DNODE_EXIT(db);
+#endif	/* DEBUG */
+
+			mutex_enter(&db->db_mtx);
+			if (db->db_state == DB_EVICTING) {
+				progress = TRUE;
+				evicting = TRUE;
+				mutex_exit(&db->db_mtx);
+			} else if (refcount_is_zero(&db->db_holds)) {
+				progress = TRUE;
+				dbuf_clear(db); /* exits db_mtx for us */
+			} else {
+				mutex_exit(&db->db_mtx);
+			}
+
+		}
+		list_remove(&dn->dn_dbufs, &marker);
+		/*
+		 * NB: we need to drop dn_dbufs_mtx between passes so
+		 * that any DB_EVICTING dbufs can make progress.
+		 * Ideally, we would have some cv we could wait on, but
+		 * since we don't, just wait a bit to give the other
+		 * thread a chance to run.
+		 */
+		mutex_exit(&dn->dn_dbufs_mtx);
+		if (evicting)
+			delay(1);
+		pass++;
+		ASSERT(pass < 100); /* sanity check */
+	} while (progress);
+
+	rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+	if (dn->dn_bonus && refcount_is_zero(&dn->dn_bonus->db_holds)) {
+		mutex_enter(&dn->dn_bonus->db_mtx);
+		dbuf_evict(dn->dn_bonus);
+		dn->dn_bonus = NULL;
+	}
+	rw_exit(&dn->dn_struct_rwlock);
+}
+
+static void
+dnode_undirty_dbufs(list_t *list)
+{
+	dbuf_dirty_record_t *dr;
+
+	while (dr = list_head(list)) {
+		dmu_buf_impl_t *db = dr->dr_dbuf;
+		uint64_t txg = dr->dr_txg;
+
+		if (db->db_level != 0)
+			dnode_undirty_dbufs(&dr->dt.di.dr_children);
+
+		mutex_enter(&db->db_mtx);
+		/* XXX - use dbuf_undirty()? */
+		list_remove(list, dr);
+		ASSERT(db->db_last_dirty == dr);
+		db->db_last_dirty = NULL;
+		db->db_dirtycnt -= 1;
+		if (db->db_level == 0) {
+			ASSERT(db->db_blkid == DMU_BONUS_BLKID ||
+			    dr->dt.dl.dr_data == db->db_buf);
+			dbuf_unoverride(dr);
+		}
+		kmem_free(dr, sizeof (dbuf_dirty_record_t));
+		dbuf_rele_and_unlock(db, (void *)(uintptr_t)txg);
+	}
+}
+
+static void
+dnode_sync_free(dnode_t *dn, dmu_tx_t *tx)
+{
+	int txgoff = tx->tx_txg & TXG_MASK;
+
+	ASSERT(dmu_tx_is_syncing(tx));
+
+	/*
+	 * Our contents should have been freed in dnode_sync() by the
+	 * free range record inserted by the caller of dnode_free().
+	 */
+	ASSERT3U(DN_USED_BYTES(dn->dn_phys), ==, 0);
+	ASSERT(BP_IS_HOLE(dn->dn_phys->dn_blkptr));
+
+	dnode_undirty_dbufs(&dn->dn_dirty_records[txgoff]);
+	dnode_evict_dbufs(dn);
+	ASSERT3P(list_head(&dn->dn_dbufs), ==, NULL);
+
+	/*
+	 * XXX - It would be nice to assert this, but we may still
+	 * have residual holds from async evictions from the arc...
+	 *
+	 * zfs_obj_to_path() also depends on this being
+	 * commented out.
+	 *
+	 * ASSERT3U(refcount_count(&dn->dn_holds), ==, 1);
+	 */
+
+	/* Undirty next bits */
+	dn->dn_next_nlevels[txgoff] = 0;
+	dn->dn_next_indblkshift[txgoff] = 0;
+	dn->dn_next_blksz[txgoff] = 0;
+
+	/* ASSERT(blkptrs are zero); */
+	ASSERT(dn->dn_phys->dn_type != DMU_OT_NONE);
+	ASSERT(dn->dn_type != DMU_OT_NONE);
+
+	ASSERT(dn->dn_free_txg > 0);
+	if (dn->dn_allocated_txg != dn->dn_free_txg)
+		dbuf_will_dirty(dn->dn_dbuf, tx);
+	bzero(dn->dn_phys, sizeof (dnode_phys_t));
+
+	mutex_enter(&dn->dn_mtx);
+	dn->dn_type = DMU_OT_NONE;
+	dn->dn_maxblkid = 0;
+	dn->dn_allocated_txg = 0;
+	dn->dn_free_txg = 0;
+	dn->dn_have_spill = B_FALSE;
+	mutex_exit(&dn->dn_mtx);
+
+	ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
+
+	dnode_rele(dn, (void *)(uintptr_t)tx->tx_txg);
+	/*
+	 * Now that we've released our hold, the dnode may
+	 * be evicted, so we musn't access it.
+	 */
+}
+
+/*
+ * Write out the dnode's dirty buffers.
+ */
+void
+dnode_sync(dnode_t *dn, dmu_tx_t *tx)
+{
+	free_range_t *rp;
+	dnode_phys_t *dnp = dn->dn_phys;
+	int txgoff = tx->tx_txg & TXG_MASK;
+	list_t *list = &dn->dn_dirty_records[txgoff];
+	static const dnode_phys_t zerodn = { 0 };
+	boolean_t kill_spill = B_FALSE;
+
+	ASSERT(dmu_tx_is_syncing(tx));
+	ASSERT(dnp->dn_type != DMU_OT_NONE || dn->dn_allocated_txg);
+	ASSERT(dnp->dn_type != DMU_OT_NONE ||
+	    bcmp(dnp, &zerodn, DNODE_SIZE) == 0);
+	DNODE_VERIFY(dn);
+
+	ASSERT(dn->dn_dbuf == NULL || arc_released(dn->dn_dbuf->db_buf));
+
+	if (dmu_objset_userused_enabled(dn->dn_objset) &&
+	    !DMU_OBJECT_IS_SPECIAL(dn->dn_object)) {
+		mutex_enter(&dn->dn_mtx);
+		dn->dn_oldused = DN_USED_BYTES(dn->dn_phys);
+		dn->dn_oldflags = dn->dn_phys->dn_flags;
+		dn->dn_phys->dn_flags |= DNODE_FLAG_USERUSED_ACCOUNTED;
+		mutex_exit(&dn->dn_mtx);
+		dmu_objset_userquota_get_ids(dn, B_FALSE, tx);
+	} else {
+		/* Once we account for it, we should always account for it. */
+		ASSERT(!(dn->dn_phys->dn_flags &
+		    DNODE_FLAG_USERUSED_ACCOUNTED));
+	}
+
+	mutex_enter(&dn->dn_mtx);
+	if (dn->dn_allocated_txg == tx->tx_txg) {
+		/* The dnode is newly allocated or reallocated */
+		if (dnp->dn_type == DMU_OT_NONE) {
+			/* this is a first alloc, not a realloc */
+			dnp->dn_nlevels = 1;
+			dnp->dn_nblkptr = dn->dn_nblkptr;
+		}
+
+		dnp->dn_type = dn->dn_type;
+		dnp->dn_bonustype = dn->dn_bonustype;
+		dnp->dn_bonuslen = dn->dn_bonuslen;
+	}
+
+	ASSERT(dnp->dn_nlevels > 1 ||
+	    BP_IS_HOLE(&dnp->dn_blkptr[0]) ||
+	    BP_GET_LSIZE(&dnp->dn_blkptr[0]) ==
+	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
+
+	if (dn->dn_next_blksz[txgoff]) {
+		ASSERT(P2PHASE(dn->dn_next_blksz[txgoff],
+		    SPA_MINBLOCKSIZE) == 0);
+		ASSERT(BP_IS_HOLE(&dnp->dn_blkptr[0]) ||
+		    dn->dn_maxblkid == 0 || list_head(list) != NULL ||
+		    avl_last(&dn->dn_ranges[txgoff]) ||
+		    dn->dn_next_blksz[txgoff] >> SPA_MINBLOCKSHIFT ==
+		    dnp->dn_datablkszsec);
+		dnp->dn_datablkszsec =
+		    dn->dn_next_blksz[txgoff] >> SPA_MINBLOCKSHIFT;
+		dn->dn_next_blksz[txgoff] = 0;
+	}
+
+	if (dn->dn_next_bonuslen[txgoff]) {
+		if (dn->dn_next_bonuslen[txgoff] == DN_ZERO_BONUSLEN)
+			dnp->dn_bonuslen = 0;
+		else
+			dnp->dn_bonuslen = dn->dn_next_bonuslen[txgoff];
+		ASSERT(dnp->dn_bonuslen <= DN_MAX_BONUSLEN);
+		dn->dn_next_bonuslen[txgoff] = 0;
+	}
+
+	if (dn->dn_next_bonustype[txgoff]) {
+		ASSERT(dn->dn_next_bonustype[txgoff] < DMU_OT_NUMTYPES);
+		dnp->dn_bonustype = dn->dn_next_bonustype[txgoff];
+		dn->dn_next_bonustype[txgoff] = 0;
+	}
+
+	/*
+	 * We will either remove a spill block when a file is being removed
+	 * or we have been asked to remove it.
+	 */
+	if (dn->dn_rm_spillblk[txgoff] ||
+	    ((dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) &&
+	    dn->dn_free_txg > 0 && dn->dn_free_txg <= tx->tx_txg)) {
+		if ((dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR))
+			kill_spill = B_TRUE;
+		dn->dn_rm_spillblk[txgoff] = 0;
+	}
+
+	if (dn->dn_next_indblkshift[txgoff]) {
+		ASSERT(dnp->dn_nlevels == 1);
+		dnp->dn_indblkshift = dn->dn_next_indblkshift[txgoff];
+		dn->dn_next_indblkshift[txgoff] = 0;
+	}
+
+	/*
+	 * Just take the live (open-context) values for checksum and compress.
+	 * Strictly speaking it's a future leak, but nothing bad happens if we
+	 * start using the new checksum or compress algorithm a little early.
+	 */
+	dnp->dn_checksum = dn->dn_checksum;
+	dnp->dn_compress = dn->dn_compress;
+
+	mutex_exit(&dn->dn_mtx);
+
+	if (kill_spill) {
+		(void) free_blocks(dn, &dn->dn_phys->dn_spill, 1, tx);
+		mutex_enter(&dn->dn_mtx);
+		dnp->dn_flags &= ~DNODE_FLAG_SPILL_BLKPTR;
+		mutex_exit(&dn->dn_mtx);
+	}
+
+	/* process all the "freed" ranges in the file */
+	while (rp = avl_last(&dn->dn_ranges[txgoff])) {
+		dnode_sync_free_range(dn, rp->fr_blkid, rp->fr_nblks, tx);
+		/* grab the mutex so we don't race with dnode_block_freed() */
+		mutex_enter(&dn->dn_mtx);
+		avl_remove(&dn->dn_ranges[txgoff], rp);
+		mutex_exit(&dn->dn_mtx);
+		kmem_free(rp, sizeof (free_range_t));
+	}
+
+	if (dn->dn_free_txg > 0 && dn->dn_free_txg <= tx->tx_txg) {
+		dnode_sync_free(dn, tx);
+		return;
+	}
+
+	if (dn->dn_next_nblkptr[txgoff]) {
+		/* this should only happen on a realloc */
+		ASSERT(dn->dn_allocated_txg == tx->tx_txg);
+		if (dn->dn_next_nblkptr[txgoff] > dnp->dn_nblkptr) {
+			/* zero the new blkptrs we are gaining */
+			bzero(dnp->dn_blkptr + dnp->dn_nblkptr,
+			    sizeof (blkptr_t) *
+			    (dn->dn_next_nblkptr[txgoff] - dnp->dn_nblkptr));
+#ifdef ZFS_DEBUG
+		} else {
+			int i;
+			ASSERT(dn->dn_next_nblkptr[txgoff] < dnp->dn_nblkptr);
+			/* the blkptrs we are losing better be unallocated */
+			for (i = dn->dn_next_nblkptr[txgoff];
+			    i < dnp->dn_nblkptr; i++)
+				ASSERT(BP_IS_HOLE(&dnp->dn_blkptr[i]));
+#endif
+		}
+		mutex_enter(&dn->dn_mtx);
+		dnp->dn_nblkptr = dn->dn_next_nblkptr[txgoff];
+		dn->dn_next_nblkptr[txgoff] = 0;
+		mutex_exit(&dn->dn_mtx);
+	}
+
+	if (dn->dn_next_nlevels[txgoff]) {
+		dnode_increase_indirection(dn, tx);
+		dn->dn_next_nlevels[txgoff] = 0;
+	}
+
+	dbuf_sync_list(list, tx);
+
+	if (!DMU_OBJECT_IS_SPECIAL(dn->dn_object)) {
+		ASSERT3P(list_head(list), ==, NULL);
+		dnode_rele(dn, (void *)(uintptr_t)tx->tx_txg);
+	}
+
+	/*
+	 * Although we have dropped our reference to the dnode, it
+	 * can't be evicted until its written, and we haven't yet
+	 * initiated the IO for the dnode's dbuf.
+	 */
+}
diff --git a/uts/common/fs/zfs/dsl_dataset.c b/uts/common/fs/zfs/dsl_dataset.c
new file mode 100644
index 000000000000..59ac4a60947a
--- /dev/null
+++ b/uts/common/fs/zfs/dsl_dataset.c
@@ -0,0 +1,4030 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/dmu_objset.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_synctask.h>
+#include <sys/dmu_traverse.h>
+#include <sys/dmu_tx.h>
+#include <sys/arc.h>
+#include <sys/zio.h>
+#include <sys/zap.h>
+#include <sys/unique.h>
+#include <sys/zfs_context.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/spa.h>
+#include <sys/zfs_znode.h>
+#include <sys/zfs_onexit.h>
+#include <sys/zvol.h>
+#include <sys/dsl_scan.h>
+#include <sys/dsl_deadlist.h>
+
+static char *dsl_reaper = "the grim reaper";
+
+static dsl_checkfunc_t dsl_dataset_destroy_begin_check;
+static dsl_syncfunc_t dsl_dataset_destroy_begin_sync;
+static dsl_syncfunc_t dsl_dataset_set_reservation_sync;
+
+#define	SWITCH64(x, y) \
+	{ \
+		uint64_t __tmp = (x); \
+		(x) = (y); \
+		(y) = __tmp; \
+	}
+
+#define	DS_REF_MAX	(1ULL << 62)
+
+#define	DSL_DEADLIST_BLOCKSIZE	SPA_MAXBLOCKSIZE
+
+#define	DSL_DATASET_IS_DESTROYED(ds)	((ds)->ds_owner == dsl_reaper)
+
+
+/*
+ * Figure out how much of this delta should be propogated to the dsl_dir
+ * layer.  If there's a refreservation, that space has already been
+ * partially accounted for in our ancestors.
+ */
+static int64_t
+parent_delta(dsl_dataset_t *ds, int64_t delta)
+{
+	uint64_t old_bytes, new_bytes;
+
+	if (ds->ds_reserved == 0)
+		return (delta);
+
+	old_bytes = MAX(ds->ds_phys->ds_unique_bytes, ds->ds_reserved);
+	new_bytes = MAX(ds->ds_phys->ds_unique_bytes + delta, ds->ds_reserved);
+
+	ASSERT3U(ABS((int64_t)(new_bytes - old_bytes)), <=, ABS(delta));
+	return (new_bytes - old_bytes);
+}
+
+void
+dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx)
+{
+	int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp);
+	int compressed = BP_GET_PSIZE(bp);
+	int uncompressed = BP_GET_UCSIZE(bp);
+	int64_t delta;
+
+	dprintf_bp(bp, "ds=%p", ds);
+
+	ASSERT(dmu_tx_is_syncing(tx));
+	/* It could have been compressed away to nothing */
+	if (BP_IS_HOLE(bp))
+		return;
+	ASSERT(BP_GET_TYPE(bp) != DMU_OT_NONE);
+	ASSERT3U(BP_GET_TYPE(bp), <, DMU_OT_NUMTYPES);
+	if (ds == NULL) {
+		/*
+		 * Account for the meta-objset space in its placeholder
+		 * dsl_dir.
+		 */
+		ASSERT3U(compressed, ==, uncompressed); /* it's all metadata */
+		dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, DD_USED_HEAD,
+		    used, compressed, uncompressed, tx);
+		dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx);
+		return;
+	}
+	dmu_buf_will_dirty(ds->ds_dbuf, tx);
+
+	mutex_enter(&ds->ds_dir->dd_lock);
+	mutex_enter(&ds->ds_lock);
+	delta = parent_delta(ds, used);
+	ds->ds_phys->ds_used_bytes += used;
+	ds->ds_phys->ds_compressed_bytes += compressed;
+	ds->ds_phys->ds_uncompressed_bytes += uncompressed;
+	ds->ds_phys->ds_unique_bytes += used;
+	mutex_exit(&ds->ds_lock);
+	dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD, delta,
+	    compressed, uncompressed, tx);
+	dsl_dir_transfer_space(ds->ds_dir, used - delta,
+	    DD_USED_REFRSRV, DD_USED_HEAD, tx);
+	mutex_exit(&ds->ds_dir->dd_lock);
+}
+
+int
+dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp, dmu_tx_t *tx,
+    boolean_t async)
+{
+	if (BP_IS_HOLE(bp))
+		return (0);
+
+	ASSERT(dmu_tx_is_syncing(tx));
+	ASSERT(bp->blk_birth <= tx->tx_txg);
+
+	int used = bp_get_dsize_sync(tx->tx_pool->dp_spa, bp);
+	int compressed = BP_GET_PSIZE(bp);
+	int uncompressed = BP_GET_UCSIZE(bp);
+
+	ASSERT(used > 0);
+	if (ds == NULL) {
+		/*
+		 * Account for the meta-objset space in its placeholder
+		 * dataset.
+		 */
+		dsl_free(tx->tx_pool, tx->tx_txg, bp);
+
+		dsl_dir_diduse_space(tx->tx_pool->dp_mos_dir, DD_USED_HEAD,
+		    -used, -compressed, -uncompressed, tx);
+		dsl_dir_dirty(tx->tx_pool->dp_mos_dir, tx);
+		return (used);
+	}
+	ASSERT3P(tx->tx_pool, ==, ds->ds_dir->dd_pool);
+
+	ASSERT(!dsl_dataset_is_snapshot(ds));
+	dmu_buf_will_dirty(ds->ds_dbuf, tx);
+
+	if (bp->blk_birth > ds->ds_phys->ds_prev_snap_txg) {
+		int64_t delta;
+
+		dprintf_bp(bp, "freeing ds=%llu", ds->ds_object);
+		dsl_free(tx->tx_pool, tx->tx_txg, bp);
+
+		mutex_enter(&ds->ds_dir->dd_lock);
+		mutex_enter(&ds->ds_lock);
+		ASSERT(ds->ds_phys->ds_unique_bytes >= used ||
+		    !DS_UNIQUE_IS_ACCURATE(ds));
+		delta = parent_delta(ds, -used);
+		ds->ds_phys->ds_unique_bytes -= used;
+		mutex_exit(&ds->ds_lock);
+		dsl_dir_diduse_space(ds->ds_dir, DD_USED_HEAD,
+		    delta, -compressed, -uncompressed, tx);
+		dsl_dir_transfer_space(ds->ds_dir, -used - delta,
+		    DD_USED_REFRSRV, DD_USED_HEAD, tx);
+		mutex_exit(&ds->ds_dir->dd_lock);
+	} else {
+		dprintf_bp(bp, "putting on dead list: %s", "");
+		if (async) {
+			/*
+			 * We are here as part of zio's write done callback,
+			 * which means we're a zio interrupt thread.  We can't
+			 * call dsl_deadlist_insert() now because it may block
+			 * waiting for I/O.  Instead, put bp on the deferred
+			 * queue and let dsl_pool_sync() finish the job.
+			 */
+			bplist_append(&ds->ds_pending_deadlist, bp);
+		} else {
+			dsl_deadlist_insert(&ds->ds_deadlist, bp, tx);
+		}
+		ASSERT3U(ds->ds_prev->ds_object, ==,
+		    ds->ds_phys->ds_prev_snap_obj);
+		ASSERT(ds->ds_prev->ds_phys->ds_num_children > 0);
+		/* if (bp->blk_birth > prev prev snap txg) prev unique += bs */
+		if (ds->ds_prev->ds_phys->ds_next_snap_obj ==
+		    ds->ds_object && bp->blk_birth >
+		    ds->ds_prev->ds_phys->ds_prev_snap_txg) {
+			dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
+			mutex_enter(&ds->ds_prev->ds_lock);
+			ds->ds_prev->ds_phys->ds_unique_bytes += used;
+			mutex_exit(&ds->ds_prev->ds_lock);
+		}
+		if (bp->blk_birth > ds->ds_dir->dd_origin_txg) {
+			dsl_dir_transfer_space(ds->ds_dir, used,
+			    DD_USED_HEAD, DD_USED_SNAP, tx);
+		}
+	}
+	mutex_enter(&ds->ds_lock);
+	ASSERT3U(ds->ds_phys->ds_used_bytes, >=, used);
+	ds->ds_phys->ds_used_bytes -= used;
+	ASSERT3U(ds->ds_phys->ds_compressed_bytes, >=, compressed);
+	ds->ds_phys->ds_compressed_bytes -= compressed;
+	ASSERT3U(ds->ds_phys->ds_uncompressed_bytes, >=, uncompressed);
+	ds->ds_phys->ds_uncompressed_bytes -= uncompressed;
+	mutex_exit(&ds->ds_lock);
+
+	return (used);
+}
+
+uint64_t
+dsl_dataset_prev_snap_txg(dsl_dataset_t *ds)
+{
+	uint64_t trysnap = 0;
+
+	if (ds == NULL)
+		return (0);
+	/*
+	 * The snapshot creation could fail, but that would cause an
+	 * incorrect FALSE return, which would only result in an
+	 * overestimation of the amount of space that an operation would
+	 * consume, which is OK.
+	 *
+	 * There's also a small window where we could miss a pending
+	 * snapshot, because we could set the sync task in the quiescing
+	 * phase.  So this should only be used as a guess.
+	 */
+	if (ds->ds_trysnap_txg >
+	    spa_last_synced_txg(ds->ds_dir->dd_pool->dp_spa))
+		trysnap = ds->ds_trysnap_txg;
+	return (MAX(ds->ds_phys->ds_prev_snap_txg, trysnap));
+}
+
+boolean_t
+dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp,
+    uint64_t blk_birth)
+{
+	if (blk_birth <= dsl_dataset_prev_snap_txg(ds))
+		return (B_FALSE);
+
+	ddt_prefetch(dsl_dataset_get_spa(ds), bp);
+
+	return (B_TRUE);
+}
+
+/* ARGSUSED */
+static void
+dsl_dataset_evict(dmu_buf_t *db, void *dsv)
+{
+	dsl_dataset_t *ds = dsv;
+
+	ASSERT(ds->ds_owner == NULL || DSL_DATASET_IS_DESTROYED(ds));
+
+	unique_remove(ds->ds_fsid_guid);
+
+	if (ds->ds_objset != NULL)
+		dmu_objset_evict(ds->ds_objset);
+
+	if (ds->ds_prev) {
+		dsl_dataset_drop_ref(ds->ds_prev, ds);
+		ds->ds_prev = NULL;
+	}
+
+	bplist_destroy(&ds->ds_pending_deadlist);
+	if (db != NULL) {
+		dsl_deadlist_close(&ds->ds_deadlist);
+	} else {
+		ASSERT(ds->ds_deadlist.dl_dbuf == NULL);
+		ASSERT(!ds->ds_deadlist.dl_oldfmt);
+	}
+	if (ds->ds_dir)
+		dsl_dir_close(ds->ds_dir, ds);
+
+	ASSERT(!list_link_active(&ds->ds_synced_link));
+
+	mutex_destroy(&ds->ds_lock);
+	mutex_destroy(&ds->ds_recvlock);
+	mutex_destroy(&ds->ds_opening_lock);
+	rw_destroy(&ds->ds_rwlock);
+	cv_destroy(&ds->ds_exclusive_cv);
+
+	kmem_free(ds, sizeof (dsl_dataset_t));
+}
+
+static int
+dsl_dataset_get_snapname(dsl_dataset_t *ds)
+{
+	dsl_dataset_phys_t *headphys;
+	int err;
+	dmu_buf_t *headdbuf;
+	dsl_pool_t *dp = ds->ds_dir->dd_pool;
+	objset_t *mos = dp->dp_meta_objset;
+
+	if (ds->ds_snapname[0])
+		return (0);
+	if (ds->ds_phys->ds_next_snap_obj == 0)
+		return (0);
+
+	err = dmu_bonus_hold(mos, ds->ds_dir->dd_phys->dd_head_dataset_obj,
+	    FTAG, &headdbuf);
+	if (err)
+		return (err);
+	headphys = headdbuf->db_data;
+	err = zap_value_search(dp->dp_meta_objset,
+	    headphys->ds_snapnames_zapobj, ds->ds_object, 0, ds->ds_snapname);
+	dmu_buf_rele(headdbuf, FTAG);
+	return (err);
+}
+
+static int
+dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name, uint64_t *value)
+{
+	objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
+	uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj;
+	matchtype_t mt;
+	int err;
+
+	if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET)
+		mt = MT_FIRST;
+	else
+		mt = MT_EXACT;
+
+	err = zap_lookup_norm(mos, snapobj, name, 8, 1,
+	    value, mt, NULL, 0, NULL);
+	if (err == ENOTSUP && mt == MT_FIRST)
+		err = zap_lookup(mos, snapobj, name, 8, 1, value);
+	return (err);
+}
+
+static int
+dsl_dataset_snap_remove(dsl_dataset_t *ds, char *name, dmu_tx_t *tx)
+{
+	objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
+	uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj;
+	matchtype_t mt;
+	int err;
+
+	dsl_dir_snap_cmtime_update(ds->ds_dir);
+
+	if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET)
+		mt = MT_FIRST;
+	else
+		mt = MT_EXACT;
+
+	err = zap_remove_norm(mos, snapobj, name, mt, tx);
+	if (err == ENOTSUP && mt == MT_FIRST)
+		err = zap_remove(mos, snapobj, name, tx);
+	return (err);
+}
+
+static int
+dsl_dataset_get_ref(dsl_pool_t *dp, uint64_t dsobj, void *tag,
+    dsl_dataset_t **dsp)
+{
+	objset_t *mos = dp->dp_meta_objset;
+	dmu_buf_t *dbuf;
+	dsl_dataset_t *ds;
+	int err;
+	dmu_object_info_t doi;
+
+	ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) ||
+	    dsl_pool_sync_context(dp));
+
+	err = dmu_bonus_hold(mos, dsobj, tag, &dbuf);
+	if (err)
+		return (err);
+
+	/* Make sure dsobj has the correct object type. */
+	dmu_object_info_from_db(dbuf, &doi);
+	if (doi.doi_type != DMU_OT_DSL_DATASET)
+		return (EINVAL);
+
+	ds = dmu_buf_get_user(dbuf);
+	if (ds == NULL) {
+		dsl_dataset_t *winner;
+
+		ds = kmem_zalloc(sizeof (dsl_dataset_t), KM_SLEEP);
+		ds->ds_dbuf = dbuf;
+		ds->ds_object = dsobj;
+		ds->ds_phys = dbuf->db_data;
+
+		mutex_init(&ds->ds_lock, NULL, MUTEX_DEFAULT, NULL);
+		mutex_init(&ds->ds_recvlock, NULL, MUTEX_DEFAULT, NULL);
+		mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL);
+		rw_init(&ds->ds_rwlock, 0, 0, 0);
+		cv_init(&ds->ds_exclusive_cv, NULL, CV_DEFAULT, NULL);
+
+		bplist_create(&ds->ds_pending_deadlist);
+		dsl_deadlist_open(&ds->ds_deadlist,
+		    mos, ds->ds_phys->ds_deadlist_obj);
+
+		if (err == 0) {
+			err = dsl_dir_open_obj(dp,
+			    ds->ds_phys->ds_dir_obj, NULL, ds, &ds->ds_dir);
+		}
+		if (err) {
+			mutex_destroy(&ds->ds_lock);
+			mutex_destroy(&ds->ds_recvlock);
+			mutex_destroy(&ds->ds_opening_lock);
+			rw_destroy(&ds->ds_rwlock);
+			cv_destroy(&ds->ds_exclusive_cv);
+			bplist_destroy(&ds->ds_pending_deadlist);
+			dsl_deadlist_close(&ds->ds_deadlist);
+			kmem_free(ds, sizeof (dsl_dataset_t));
+			dmu_buf_rele(dbuf, tag);
+			return (err);
+		}
+
+		if (!dsl_dataset_is_snapshot(ds)) {
+			ds->ds_snapname[0] = '\0';
+			if (ds->ds_phys->ds_prev_snap_obj) {
+				err = dsl_dataset_get_ref(dp,
+				    ds->ds_phys->ds_prev_snap_obj,
+				    ds, &ds->ds_prev);
+			}
+		} else {
+			if (zfs_flags & ZFS_DEBUG_SNAPNAMES)
+				err = dsl_dataset_get_snapname(ds);
+			if (err == 0 && ds->ds_phys->ds_userrefs_obj != 0) {
+				err = zap_count(
+				    ds->ds_dir->dd_pool->dp_meta_objset,
+				    ds->ds_phys->ds_userrefs_obj,
+				    &ds->ds_userrefs);
+			}
+		}
+
+		if (err == 0 && !dsl_dataset_is_snapshot(ds)) {
+			/*
+			 * In sync context, we're called with either no lock
+			 * or with the write lock.  If we're not syncing,
+			 * we're always called with the read lock held.
+			 */
+			boolean_t need_lock =
+			    !RW_WRITE_HELD(&dp->dp_config_rwlock) &&
+			    dsl_pool_sync_context(dp);
+
+			if (need_lock)
+				rw_enter(&dp->dp_config_rwlock, RW_READER);
+
+			err = dsl_prop_get_ds(ds,
+			    "refreservation", sizeof (uint64_t), 1,
+			    &ds->ds_reserved, NULL);
+			if (err == 0) {
+				err = dsl_prop_get_ds(ds,
+				    "refquota", sizeof (uint64_t), 1,
+				    &ds->ds_quota, NULL);
+			}
+
+			if (need_lock)
+				rw_exit(&dp->dp_config_rwlock);
+		} else {
+			ds->ds_reserved = ds->ds_quota = 0;
+		}
+
+		if (err == 0) {
+			winner = dmu_buf_set_user_ie(dbuf, ds, &ds->ds_phys,
+			    dsl_dataset_evict);
+		}
+		if (err || winner) {
+			bplist_destroy(&ds->ds_pending_deadlist);
+			dsl_deadlist_close(&ds->ds_deadlist);
+			if (ds->ds_prev)
+				dsl_dataset_drop_ref(ds->ds_prev, ds);
+			dsl_dir_close(ds->ds_dir, ds);
+			mutex_destroy(&ds->ds_lock);
+			mutex_destroy(&ds->ds_recvlock);
+			mutex_destroy(&ds->ds_opening_lock);
+			rw_destroy(&ds->ds_rwlock);
+			cv_destroy(&ds->ds_exclusive_cv);
+			kmem_free(ds, sizeof (dsl_dataset_t));
+			if (err) {
+				dmu_buf_rele(dbuf, tag);
+				return (err);
+			}
+			ds = winner;
+		} else {
+			ds->ds_fsid_guid =
+			    unique_insert(ds->ds_phys->ds_fsid_guid);
+		}
+	}
+	ASSERT3P(ds->ds_dbuf, ==, dbuf);
+	ASSERT3P(ds->ds_phys, ==, dbuf->db_data);
+	ASSERT(ds->ds_phys->ds_prev_snap_obj != 0 ||
+	    spa_version(dp->dp_spa) < SPA_VERSION_ORIGIN ||
+	    dp->dp_origin_snap == NULL || ds == dp->dp_origin_snap);
+	mutex_enter(&ds->ds_lock);
+	if (!dsl_pool_sync_context(dp) && DSL_DATASET_IS_DESTROYED(ds)) {
+		mutex_exit(&ds->ds_lock);
+		dmu_buf_rele(ds->ds_dbuf, tag);
+		return (ENOENT);
+	}
+	mutex_exit(&ds->ds_lock);
+	*dsp = ds;
+	return (0);
+}
+
+static int
+dsl_dataset_hold_ref(dsl_dataset_t *ds, void *tag)
+{
+	dsl_pool_t *dp = ds->ds_dir->dd_pool;
+
+	/*
+	 * In syncing context we don't want the rwlock lock: there
+	 * may be an existing writer waiting for sync phase to
+	 * finish.  We don't need to worry about such writers, since
+	 * sync phase is single-threaded, so the writer can't be
+	 * doing anything while we are active.
+	 */
+	if (dsl_pool_sync_context(dp)) {
+		ASSERT(!DSL_DATASET_IS_DESTROYED(ds));
+		return (0);
+	}
+
+	/*
+	 * Normal users will hold the ds_rwlock as a READER until they
+	 * are finished (i.e., call dsl_dataset_rele()).  "Owners" will
+	 * drop their READER lock after they set the ds_owner field.
+	 *
+	 * If the dataset is being destroyed, the destroy thread will
+	 * obtain a WRITER lock for exclusive access after it's done its
+	 * open-context work and then change the ds_owner to
+	 * dsl_reaper once destruction is assured.  So threads
+	 * may block here temporarily, until the "destructability" of
+	 * the dataset is determined.
+	 */
+	ASSERT(!RW_WRITE_HELD(&dp->dp_config_rwlock));
+	mutex_enter(&ds->ds_lock);
+	while (!rw_tryenter(&ds->ds_rwlock, RW_READER)) {
+		rw_exit(&dp->dp_config_rwlock);
+		cv_wait(&ds->ds_exclusive_cv, &ds->ds_lock);
+		if (DSL_DATASET_IS_DESTROYED(ds)) {
+			mutex_exit(&ds->ds_lock);
+			dsl_dataset_drop_ref(ds, tag);
+			rw_enter(&dp->dp_config_rwlock, RW_READER);
+			return (ENOENT);
+		}
+		/*
+		 * The dp_config_rwlock lives above the ds_lock. And
+		 * we need to check DSL_DATASET_IS_DESTROYED() while
+		 * holding the ds_lock, so we have to drop and reacquire
+		 * the ds_lock here.
+		 */
+		mutex_exit(&ds->ds_lock);
+		rw_enter(&dp->dp_config_rwlock, RW_READER);
+		mutex_enter(&ds->ds_lock);
+	}
+	mutex_exit(&ds->ds_lock);
+	return (0);
+}
+
+int
+dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag,
+    dsl_dataset_t **dsp)
+{
+	int err = dsl_dataset_get_ref(dp, dsobj, tag, dsp);
+
+	if (err)
+		return (err);
+	return (dsl_dataset_hold_ref(*dsp, tag));
+}
+
+int
+dsl_dataset_own_obj(dsl_pool_t *dp, uint64_t dsobj, boolean_t inconsistentok,
+    void *tag, dsl_dataset_t **dsp)
+{
+	int err = dsl_dataset_hold_obj(dp, dsobj, tag, dsp);
+	if (err)
+		return (err);
+	if (!dsl_dataset_tryown(*dsp, inconsistentok, tag)) {
+		dsl_dataset_rele(*dsp, tag);
+		*dsp = NULL;
+		return (EBUSY);
+	}
+	return (0);
+}
+
+int
+dsl_dataset_hold(const char *name, void *tag, dsl_dataset_t **dsp)
+{
+	dsl_dir_t *dd;
+	dsl_pool_t *dp;
+	const char *snapname;
+	uint64_t obj;
+	int err = 0;
+
+	err = dsl_dir_open_spa(NULL, name, FTAG, &dd, &snapname);
+	if (err)
+		return (err);
+
+	dp = dd->dd_pool;
+	obj = dd->dd_phys->dd_head_dataset_obj;
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+	if (obj)
+		err = dsl_dataset_get_ref(dp, obj, tag, dsp);
+	else
+		err = ENOENT;
+	if (err)
+		goto out;
+
+	err = dsl_dataset_hold_ref(*dsp, tag);
+
+	/* we may be looking for a snapshot */
+	if (err == 0 && snapname != NULL) {
+		dsl_dataset_t *ds = NULL;
+
+		if (*snapname++ != '@') {
+			dsl_dataset_rele(*dsp, tag);
+			err = ENOENT;
+			goto out;
+		}
+
+		dprintf("looking for snapshot '%s'\n", snapname);
+		err = dsl_dataset_snap_lookup(*dsp, snapname, &obj);
+		if (err == 0)
+			err = dsl_dataset_get_ref(dp, obj, tag, &ds);
+		dsl_dataset_rele(*dsp, tag);
+
+		ASSERT3U((err == 0), ==, (ds != NULL));
+
+		if (ds) {
+			mutex_enter(&ds->ds_lock);
+			if (ds->ds_snapname[0] == 0)
+				(void) strlcpy(ds->ds_snapname, snapname,
+				    sizeof (ds->ds_snapname));
+			mutex_exit(&ds->ds_lock);
+			err = dsl_dataset_hold_ref(ds, tag);
+			*dsp = err ? NULL : ds;
+		}
+	}
+out:
+	rw_exit(&dp->dp_config_rwlock);
+	dsl_dir_close(dd, FTAG);
+	return (err);
+}
+
+int
+dsl_dataset_own(const char *name, boolean_t inconsistentok,
+    void *tag, dsl_dataset_t **dsp)
+{
+	int err = dsl_dataset_hold(name, tag, dsp);
+	if (err)
+		return (err);
+	if (!dsl_dataset_tryown(*dsp, inconsistentok, tag)) {
+		dsl_dataset_rele(*dsp, tag);
+		return (EBUSY);
+	}
+	return (0);
+}
+
+void
+dsl_dataset_name(dsl_dataset_t *ds, char *name)
+{
+	if (ds == NULL) {
+		(void) strcpy(name, "mos");
+	} else {
+		dsl_dir_name(ds->ds_dir, name);
+		VERIFY(0 == dsl_dataset_get_snapname(ds));
+		if (ds->ds_snapname[0]) {
+			(void) strcat(name, "@");
+			/*
+			 * We use a "recursive" mutex so that we
+			 * can call dprintf_ds() with ds_lock held.
+			 */
+			if (!MUTEX_HELD(&ds->ds_lock)) {
+				mutex_enter(&ds->ds_lock);
+				(void) strcat(name, ds->ds_snapname);
+				mutex_exit(&ds->ds_lock);
+			} else {
+				(void) strcat(name, ds->ds_snapname);
+			}
+		}
+	}
+}
+
+static int
+dsl_dataset_namelen(dsl_dataset_t *ds)
+{
+	int result;
+
+	if (ds == NULL) {
+		result = 3;	/* "mos" */
+	} else {
+		result = dsl_dir_namelen(ds->ds_dir);
+		VERIFY(0 == dsl_dataset_get_snapname(ds));
+		if (ds->ds_snapname[0]) {
+			++result;	/* adding one for the @-sign */
+			if (!MUTEX_HELD(&ds->ds_lock)) {
+				mutex_enter(&ds->ds_lock);
+				result += strlen(ds->ds_snapname);
+				mutex_exit(&ds->ds_lock);
+			} else {
+				result += strlen(ds->ds_snapname);
+			}
+		}
+	}
+
+	return (result);
+}
+
+void
+dsl_dataset_drop_ref(dsl_dataset_t *ds, void *tag)
+{
+	dmu_buf_rele(ds->ds_dbuf, tag);
+}
+
+void
+dsl_dataset_rele(dsl_dataset_t *ds, void *tag)
+{
+	if (!dsl_pool_sync_context(ds->ds_dir->dd_pool)) {
+		rw_exit(&ds->ds_rwlock);
+	}
+	dsl_dataset_drop_ref(ds, tag);
+}
+
+void
+dsl_dataset_disown(dsl_dataset_t *ds, void *tag)
+{
+	ASSERT((ds->ds_owner == tag && ds->ds_dbuf) ||
+	    (DSL_DATASET_IS_DESTROYED(ds) && ds->ds_dbuf == NULL));
+
+	mutex_enter(&ds->ds_lock);
+	ds->ds_owner = NULL;
+	if (RW_WRITE_HELD(&ds->ds_rwlock)) {
+		rw_exit(&ds->ds_rwlock);
+		cv_broadcast(&ds->ds_exclusive_cv);
+	}
+	mutex_exit(&ds->ds_lock);
+	if (ds->ds_dbuf)
+		dsl_dataset_drop_ref(ds, tag);
+	else
+		dsl_dataset_evict(NULL, ds);
+}
+
+boolean_t
+dsl_dataset_tryown(dsl_dataset_t *ds, boolean_t inconsistentok, void *tag)
+{
+	boolean_t gotit = FALSE;
+
+	mutex_enter(&ds->ds_lock);
+	if (ds->ds_owner == NULL &&
+	    (!DS_IS_INCONSISTENT(ds) || inconsistentok)) {
+		ds->ds_owner = tag;
+		if (!dsl_pool_sync_context(ds->ds_dir->dd_pool))
+			rw_exit(&ds->ds_rwlock);
+		gotit = TRUE;
+	}
+	mutex_exit(&ds->ds_lock);
+	return (gotit);
+}
+
+void
+dsl_dataset_make_exclusive(dsl_dataset_t *ds, void *owner)
+{
+	ASSERT3P(owner, ==, ds->ds_owner);
+	if (!RW_WRITE_HELD(&ds->ds_rwlock))
+		rw_enter(&ds->ds_rwlock, RW_WRITER);
+}
+
+uint64_t
+dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
+    uint64_t flags, dmu_tx_t *tx)
+{
+	dsl_pool_t *dp = dd->dd_pool;
+	dmu_buf_t *dbuf;
+	dsl_dataset_phys_t *dsphys;
+	uint64_t dsobj;
+	objset_t *mos = dp->dp_meta_objset;
+
+	if (origin == NULL)
+		origin = dp->dp_origin_snap;
+
+	ASSERT(origin == NULL || origin->ds_dir->dd_pool == dp);
+	ASSERT(origin == NULL || origin->ds_phys->ds_num_children > 0);
+	ASSERT(dmu_tx_is_syncing(tx));
+	ASSERT(dd->dd_phys->dd_head_dataset_obj == 0);
+
+	dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0,
+	    DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx);
+	VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf));
+	dmu_buf_will_dirty(dbuf, tx);
+	dsphys = dbuf->db_data;
+	bzero(dsphys, sizeof (dsl_dataset_phys_t));
+	dsphys->ds_dir_obj = dd->dd_object;
+	dsphys->ds_flags = flags;
+	dsphys->ds_fsid_guid = unique_create();
+	(void) random_get_pseudo_bytes((void*)&dsphys->ds_guid,
+	    sizeof (dsphys->ds_guid));
+	dsphys->ds_snapnames_zapobj =
+	    zap_create_norm(mos, U8_TEXTPREP_TOUPPER, DMU_OT_DSL_DS_SNAP_MAP,
+	    DMU_OT_NONE, 0, tx);
+	dsphys->ds_creation_time = gethrestime_sec();
+	dsphys->ds_creation_txg = tx->tx_txg == TXG_INITIAL ? 1 : tx->tx_txg;
+
+	if (origin == NULL) {
+		dsphys->ds_deadlist_obj = dsl_deadlist_alloc(mos, tx);
+	} else {
+		dsl_dataset_t *ohds;
+
+		dsphys->ds_prev_snap_obj = origin->ds_object;
+		dsphys->ds_prev_snap_txg =
+		    origin->ds_phys->ds_creation_txg;
+		dsphys->ds_used_bytes =
+		    origin->ds_phys->ds_used_bytes;
+		dsphys->ds_compressed_bytes =
+		    origin->ds_phys->ds_compressed_bytes;
+		dsphys->ds_uncompressed_bytes =
+		    origin->ds_phys->ds_uncompressed_bytes;
+		dsphys->ds_bp = origin->ds_phys->ds_bp;
+		dsphys->ds_flags |= origin->ds_phys->ds_flags;
+
+		dmu_buf_will_dirty(origin->ds_dbuf, tx);
+		origin->ds_phys->ds_num_children++;
+
+		VERIFY3U(0, ==, dsl_dataset_hold_obj(dp,
+		    origin->ds_dir->dd_phys->dd_head_dataset_obj, FTAG, &ohds));
+		dsphys->ds_deadlist_obj = dsl_deadlist_clone(&ohds->ds_deadlist,
+		    dsphys->ds_prev_snap_txg, dsphys->ds_prev_snap_obj, tx);
+		dsl_dataset_rele(ohds, FTAG);
+
+		if (spa_version(dp->dp_spa) >= SPA_VERSION_NEXT_CLONES) {
+			if (origin->ds_phys->ds_next_clones_obj == 0) {
+				origin->ds_phys->ds_next_clones_obj =
+				    zap_create(mos,
+				    DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx);
+			}
+			VERIFY(0 == zap_add_int(mos,
+			    origin->ds_phys->ds_next_clones_obj,
+			    dsobj, tx));
+		}
+
+		dmu_buf_will_dirty(dd->dd_dbuf, tx);
+		dd->dd_phys->dd_origin_obj = origin->ds_object;
+		if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) {
+			if (origin->ds_dir->dd_phys->dd_clones == 0) {
+				dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx);
+				origin->ds_dir->dd_phys->dd_clones =
+				    zap_create(mos,
+				    DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx);
+			}
+			VERIFY3U(0, ==, zap_add_int(mos,
+			    origin->ds_dir->dd_phys->dd_clones, dsobj, tx));
+		}
+	}
+
+	if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE)
+		dsphys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE;
+
+	dmu_buf_rele(dbuf, FTAG);
+
+	dmu_buf_will_dirty(dd->dd_dbuf, tx);
+	dd->dd_phys->dd_head_dataset_obj = dsobj;
+
+	return (dsobj);
+}
+
+uint64_t
+dsl_dataset_create_sync(dsl_dir_t *pdd, const char *lastname,
+    dsl_dataset_t *origin, uint64_t flags, cred_t *cr, dmu_tx_t *tx)
+{
+	dsl_pool_t *dp = pdd->dd_pool;
+	uint64_t dsobj, ddobj;
+	dsl_dir_t *dd;
+
+	ASSERT(lastname[0] != '@');
+
+	ddobj = dsl_dir_create_sync(dp, pdd, lastname, tx);
+	VERIFY(0 == dsl_dir_open_obj(dp, ddobj, lastname, FTAG, &dd));
+
+	dsobj = dsl_dataset_create_sync_dd(dd, origin, flags, tx);
+
+	dsl_deleg_set_create_perms(dd, tx, cr);
+
+	dsl_dir_close(dd, FTAG);
+
+	/*
+	 * If we are creating a clone, make sure we zero out any stale
+	 * data from the origin snapshots zil header.
+	 */
+	if (origin != NULL) {
+		dsl_dataset_t *ds;
+		objset_t *os;
+
+		VERIFY3U(0, ==, dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds));
+		VERIFY3U(0, ==, dmu_objset_from_ds(ds, &os));
+		bzero(&os->os_zil_header, sizeof (os->os_zil_header));
+		dsl_dataset_dirty(ds, tx);
+		dsl_dataset_rele(ds, FTAG);
+	}
+
+	return (dsobj);
+}
+
+struct destroyarg {
+	dsl_sync_task_group_t *dstg;
+	char *snapname;
+	char *failed;
+	boolean_t defer;
+};
+
+static int
+dsl_snapshot_destroy_one(const char *name, void *arg)
+{
+	struct destroyarg *da = arg;
+	dsl_dataset_t *ds;
+	int err;
+	char *dsname;
+
+	dsname = kmem_asprintf("%s@%s", name, da->snapname);
+	err = dsl_dataset_own(dsname, B_TRUE, da->dstg, &ds);
+	strfree(dsname);
+	if (err == 0) {
+		struct dsl_ds_destroyarg *dsda;
+
+		dsl_dataset_make_exclusive(ds, da->dstg);
+		dsda = kmem_zalloc(sizeof (struct dsl_ds_destroyarg), KM_SLEEP);
+		dsda->ds = ds;
+		dsda->defer = da->defer;
+		dsl_sync_task_create(da->dstg, dsl_dataset_destroy_check,
+		    dsl_dataset_destroy_sync, dsda, da->dstg, 0);
+	} else if (err == ENOENT) {
+		err = 0;
+	} else {
+		(void) strcpy(da->failed, name);
+	}
+	return (err);
+}
+
+/*
+ * Destroy 'snapname' in all descendants of 'fsname'.
+ */
+#pragma weak dmu_snapshots_destroy = dsl_snapshots_destroy
+int
+dsl_snapshots_destroy(char *fsname, char *snapname, boolean_t defer)
+{
+	int err;
+	struct destroyarg da;
+	dsl_sync_task_t *dst;
+	spa_t *spa;
+
+	err = spa_open(fsname, &spa, FTAG);
+	if (err)
+		return (err);
+	da.dstg = dsl_sync_task_group_create(spa_get_dsl(spa));
+	da.snapname = snapname;
+	da.failed = fsname;
+	da.defer = defer;
+
+	err = dmu_objset_find(fsname,
+	    dsl_snapshot_destroy_one, &da, DS_FIND_CHILDREN);
+
+	if (err == 0)
+		err = dsl_sync_task_group_wait(da.dstg);
+
+	for (dst = list_head(&da.dstg->dstg_tasks); dst;
+	    dst = list_next(&da.dstg->dstg_tasks, dst)) {
+		struct dsl_ds_destroyarg *dsda = dst->dst_arg1;
+		dsl_dataset_t *ds = dsda->ds;
+
+		/*
+		 * Return the file system name that triggered the error
+		 */
+		if (dst->dst_err) {
+			dsl_dataset_name(ds, fsname);
+			*strchr(fsname, '@') = '\0';
+		}
+		ASSERT3P(dsda->rm_origin, ==, NULL);
+		dsl_dataset_disown(ds, da.dstg);
+		kmem_free(dsda, sizeof (struct dsl_ds_destroyarg));
+	}
+
+	dsl_sync_task_group_destroy(da.dstg);
+	spa_close(spa, FTAG);
+	return (err);
+}
+
+static boolean_t
+dsl_dataset_might_destroy_origin(dsl_dataset_t *ds)
+{
+	boolean_t might_destroy = B_FALSE;
+
+	mutex_enter(&ds->ds_lock);
+	if (ds->ds_phys->ds_num_children == 2 && ds->ds_userrefs == 0 &&
+	    DS_IS_DEFER_DESTROY(ds))
+		might_destroy = B_TRUE;
+	mutex_exit(&ds->ds_lock);
+
+	return (might_destroy);
+}
+
+/*
+ * If we're removing a clone, and these three conditions are true:
+ *	1) the clone's origin has no other children
+ *	2) the clone's origin has no user references
+ *	3) the clone's origin has been marked for deferred destruction
+ * Then, prepare to remove the origin as part of this sync task group.
+ */
+static int
+dsl_dataset_origin_rm_prep(struct dsl_ds_destroyarg *dsda, void *tag)
+{
+	dsl_dataset_t *ds = dsda->ds;
+	dsl_dataset_t *origin = ds->ds_prev;
+
+	if (dsl_dataset_might_destroy_origin(origin)) {
+		char *name;
+		int namelen;
+		int error;
+
+		namelen = dsl_dataset_namelen(origin) + 1;
+		name = kmem_alloc(namelen, KM_SLEEP);
+		dsl_dataset_name(origin, name);
+#ifdef _KERNEL
+		error = zfs_unmount_snap(name, NULL);
+		if (error) {
+			kmem_free(name, namelen);
+			return (error);
+		}
+#endif
+		error = dsl_dataset_own(name, B_TRUE, tag, &origin);
+		kmem_free(name, namelen);
+		if (error)
+			return (error);
+		dsda->rm_origin = origin;
+		dsl_dataset_make_exclusive(origin, tag);
+	}
+
+	return (0);
+}
+
+/*
+ * ds must be opened as OWNER.  On return (whether successful or not),
+ * ds will be closed and caller can no longer dereference it.
+ */
+int
+dsl_dataset_destroy(dsl_dataset_t *ds, void *tag, boolean_t defer)
+{
+	int err;
+	dsl_sync_task_group_t *dstg;
+	objset_t *os;
+	dsl_dir_t *dd;
+	uint64_t obj;
+	struct dsl_ds_destroyarg dsda = { 0 };
+	dsl_dataset_t dummy_ds = { 0 };
+
+	dsda.ds = ds;
+
+	if (dsl_dataset_is_snapshot(ds)) {
+		/* Destroying a snapshot is simpler */
+		dsl_dataset_make_exclusive(ds, tag);
+
+		dsda.defer = defer;
+		err = dsl_sync_task_do(ds->ds_dir->dd_pool,
+		    dsl_dataset_destroy_check, dsl_dataset_destroy_sync,
+		    &dsda, tag, 0);
+		ASSERT3P(dsda.rm_origin, ==, NULL);
+		goto out;
+	} else if (defer) {
+		err = EINVAL;
+		goto out;
+	}
+
+	dd = ds->ds_dir;
+	dummy_ds.ds_dir = dd;
+	dummy_ds.ds_object = ds->ds_object;
+
+	/*
+	 * Check for errors and mark this ds as inconsistent, in
+	 * case we crash while freeing the objects.
+	 */
+	err = dsl_sync_task_do(dd->dd_pool, dsl_dataset_destroy_begin_check,
+	    dsl_dataset_destroy_begin_sync, ds, NULL, 0);
+	if (err)
+		goto out;
+
+	err = dmu_objset_from_ds(ds, &os);
+	if (err)
+		goto out;
+
+	/*
+	 * remove the objects in open context, so that we won't
+	 * have too much to do in syncing context.
+	 */
+	for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE,
+	    ds->ds_phys->ds_prev_snap_txg)) {
+		/*
+		 * Ignore errors, if there is not enough disk space
+		 * we will deal with it in dsl_dataset_destroy_sync().
+		 */
+		(void) dmu_free_object(os, obj);
+	}
+	if (err != ESRCH)
+		goto out;
+
+	/*
+	 * Only the ZIL knows how to free log blocks.
+	 */
+	zil_destroy(dmu_objset_zil(os), B_FALSE);
+
+	/*
+	 * Sync out all in-flight IO.
+	 */
+	txg_wait_synced(dd->dd_pool, 0);
+
+	/*
+	 * If we managed to free all the objects in open
+	 * context, the user space accounting should be zero.
+	 */
+	if (ds->ds_phys->ds_bp.blk_fill == 0 &&
+	    dmu_objset_userused_enabled(os)) {
+		uint64_t count;
+
+		ASSERT(zap_count(os, DMU_USERUSED_OBJECT, &count) != 0 ||
+		    count == 0);
+		ASSERT(zap_count(os, DMU_GROUPUSED_OBJECT, &count) != 0 ||
+		    count == 0);
+	}
+
+	rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER);
+	err = dsl_dir_open_obj(dd->dd_pool, dd->dd_object, NULL, FTAG, &dd);
+	rw_exit(&dd->dd_pool->dp_config_rwlock);
+
+	if (err)
+		goto out;
+
+	/*
+	 * Blow away the dsl_dir + head dataset.
+	 */
+	dsl_dataset_make_exclusive(ds, tag);
+	/*
+	 * If we're removing a clone, we might also need to remove its
+	 * origin.
+	 */
+	do {
+		dsda.need_prep = B_FALSE;
+		if (dsl_dir_is_clone(dd)) {
+			err = dsl_dataset_origin_rm_prep(&dsda, tag);
+			if (err) {
+				dsl_dir_close(dd, FTAG);
+				goto out;
+			}
+		}
+
+		dstg = dsl_sync_task_group_create(ds->ds_dir->dd_pool);
+		dsl_sync_task_create(dstg, dsl_dataset_destroy_check,
+		    dsl_dataset_destroy_sync, &dsda, tag, 0);
+		dsl_sync_task_create(dstg, dsl_dir_destroy_check,
+		    dsl_dir_destroy_sync, &dummy_ds, FTAG, 0);
+		err = dsl_sync_task_group_wait(dstg);
+		dsl_sync_task_group_destroy(dstg);
+
+		/*
+		 * We could be racing against 'zfs release' or 'zfs destroy -d'
+		 * on the origin snap, in which case we can get EBUSY if we
+		 * needed to destroy the origin snap but were not ready to
+		 * do so.
+		 */
+		if (dsda.need_prep) {
+			ASSERT(err == EBUSY);
+			ASSERT(dsl_dir_is_clone(dd));
+			ASSERT(dsda.rm_origin == NULL);
+		}
+	} while (dsda.need_prep);
+
+	if (dsda.rm_origin != NULL)
+		dsl_dataset_disown(dsda.rm_origin, tag);
+
+	/* if it is successful, dsl_dir_destroy_sync will close the dd */
+	if (err)
+		dsl_dir_close(dd, FTAG);
+out:
+	dsl_dataset_disown(ds, tag);
+	return (err);
+}
+
+blkptr_t *
+dsl_dataset_get_blkptr(dsl_dataset_t *ds)
+{
+	return (&ds->ds_phys->ds_bp);
+}
+
+void
+dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx)
+{
+	ASSERT(dmu_tx_is_syncing(tx));
+	/* If it's the meta-objset, set dp_meta_rootbp */
+	if (ds == NULL) {
+		tx->tx_pool->dp_meta_rootbp = *bp;
+	} else {
+		dmu_buf_will_dirty(ds->ds_dbuf, tx);
+		ds->ds_phys->ds_bp = *bp;
+	}
+}
+
+spa_t *
+dsl_dataset_get_spa(dsl_dataset_t *ds)
+{
+	return (ds->ds_dir->dd_pool->dp_spa);
+}
+
+void
+dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx)
+{
+	dsl_pool_t *dp;
+
+	if (ds == NULL) /* this is the meta-objset */
+		return;
+
+	ASSERT(ds->ds_objset != NULL);
+
+	if (ds->ds_phys->ds_next_snap_obj != 0)
+		panic("dirtying snapshot!");
+
+	dp = ds->ds_dir->dd_pool;
+
+	if (txg_list_add(&dp->dp_dirty_datasets, ds, tx->tx_txg) == 0) {
+		/* up the hold count until we can be written out */
+		dmu_buf_add_ref(ds->ds_dbuf, ds);
+	}
+}
+
+/*
+ * The unique space in the head dataset can be calculated by subtracting
+ * the space used in the most recent snapshot, that is still being used
+ * in this file system, from the space currently in use.  To figure out
+ * the space in the most recent snapshot still in use, we need to take
+ * the total space used in the snapshot and subtract out the space that
+ * has been freed up since the snapshot was taken.
+ */
+static void
+dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds)
+{
+	uint64_t mrs_used;
+	uint64_t dlused, dlcomp, dluncomp;
+
+	ASSERT(!dsl_dataset_is_snapshot(ds));
+
+	if (ds->ds_phys->ds_prev_snap_obj != 0)
+		mrs_used = ds->ds_prev->ds_phys->ds_used_bytes;
+	else
+		mrs_used = 0;
+
+	dsl_deadlist_space(&ds->ds_deadlist, &dlused, &dlcomp, &dluncomp);
+
+	ASSERT3U(dlused, <=, mrs_used);
+	ds->ds_phys->ds_unique_bytes =
+	    ds->ds_phys->ds_used_bytes - (mrs_used - dlused);
+
+	if (spa_version(ds->ds_dir->dd_pool->dp_spa) >=
+	    SPA_VERSION_UNIQUE_ACCURATE)
+		ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE;
+}
+
+struct killarg {
+	dsl_dataset_t *ds;
+	dmu_tx_t *tx;
+};
+
+/* ARGSUSED */
+static int
+kill_blkptr(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, arc_buf_t *pbuf,
+    const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
+{
+	struct killarg *ka = arg;
+	dmu_tx_t *tx = ka->tx;
+
+	if (bp == NULL)
+		return (0);
+
+	if (zb->zb_level == ZB_ZIL_LEVEL) {
+		ASSERT(zilog != NULL);
+		/*
+		 * It's a block in the intent log.  It has no
+		 * accounting, so just free it.
+		 */
+		dsl_free(ka->tx->tx_pool, ka->tx->tx_txg, bp);
+	} else {
+		ASSERT(zilog == NULL);
+		ASSERT3U(bp->blk_birth, >, ka->ds->ds_phys->ds_prev_snap_txg);
+		(void) dsl_dataset_block_kill(ka->ds, bp, tx, B_FALSE);
+	}
+
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+dsl_dataset_destroy_begin_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
+	uint64_t count;
+	int err;
+
+	/*
+	 * Can't delete a head dataset if there are snapshots of it.
+	 * (Except if the only snapshots are from the branch we cloned
+	 * from.)
+	 */
+	if (ds->ds_prev != NULL &&
+	    ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object)
+		return (EBUSY);
+
+	/*
+	 * This is really a dsl_dir thing, but check it here so that
+	 * we'll be less likely to leave this dataset inconsistent &
+	 * nearly destroyed.
+	 */
+	err = zap_count(mos, ds->ds_dir->dd_phys->dd_child_dir_zapobj, &count);
+	if (err)
+		return (err);
+	if (count != 0)
+		return (EEXIST);
+
+	return (0);
+}
+
+/* ARGSUSED */
+static void
+dsl_dataset_destroy_begin_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_pool_t *dp = ds->ds_dir->dd_pool;
+
+	/* Mark it as inconsistent on-disk, in case we crash */
+	dmu_buf_will_dirty(ds->ds_dbuf, tx);
+	ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT;
+
+	spa_history_log_internal(LOG_DS_DESTROY_BEGIN, dp->dp_spa, tx,
+	    "dataset = %llu", ds->ds_object);
+}
+
+static int
+dsl_dataset_origin_check(struct dsl_ds_destroyarg *dsda, void *tag,
+    dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = dsda->ds;
+	dsl_dataset_t *ds_prev = ds->ds_prev;
+
+	if (dsl_dataset_might_destroy_origin(ds_prev)) {
+		struct dsl_ds_destroyarg ndsda = {0};
+
+		/*
+		 * If we're not prepared to remove the origin, don't remove
+		 * the clone either.
+		 */
+		if (dsda->rm_origin == NULL) {
+			dsda->need_prep = B_TRUE;
+			return (EBUSY);
+		}
+
+		ndsda.ds = ds_prev;
+		ndsda.is_origin_rm = B_TRUE;
+		return (dsl_dataset_destroy_check(&ndsda, tag, tx));
+	}
+
+	/*
+	 * If we're not going to remove the origin after all,
+	 * undo the open context setup.
+	 */
+	if (dsda->rm_origin != NULL) {
+		dsl_dataset_disown(dsda->rm_origin, tag);
+		dsda->rm_origin = NULL;
+	}
+
+	return (0);
+}
+
+/*
+ * If you add new checks here, you may need to add
+ * additional checks to the "temporary" case in
+ * snapshot_check() in dmu_objset.c.
+ */
+/* ARGSUSED */
+int
+dsl_dataset_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	struct dsl_ds_destroyarg *dsda = arg1;
+	dsl_dataset_t *ds = dsda->ds;
+
+	/* we have an owner hold, so noone else can destroy us */
+	ASSERT(!DSL_DATASET_IS_DESTROYED(ds));
+
+	/*
+	 * Only allow deferred destroy on pools that support it.
+	 * NOTE: deferred destroy is only supported on snapshots.
+	 */
+	if (dsda->defer) {
+		if (spa_version(ds->ds_dir->dd_pool->dp_spa) <
+		    SPA_VERSION_USERREFS)
+			return (ENOTSUP);
+		ASSERT(dsl_dataset_is_snapshot(ds));
+		return (0);
+	}
+
+	/*
+	 * Can't delete a head dataset if there are snapshots of it.
+	 * (Except if the only snapshots are from the branch we cloned
+	 * from.)
+	 */
+	if (ds->ds_prev != NULL &&
+	    ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object)
+		return (EBUSY);
+
+	/*
+	 * If we made changes this txg, traverse_dsl_dataset won't find
+	 * them.  Try again.
+	 */
+	if (ds->ds_phys->ds_bp.blk_birth >= tx->tx_txg)
+		return (EAGAIN);
+
+	if (dsl_dataset_is_snapshot(ds)) {
+		/*
+		 * If this snapshot has an elevated user reference count,
+		 * we can't destroy it yet.
+		 */
+		if (ds->ds_userrefs > 0 && !dsda->releasing)
+			return (EBUSY);
+
+		mutex_enter(&ds->ds_lock);
+		/*
+		 * Can't delete a branch point. However, if we're destroying
+		 * a clone and removing its origin due to it having a user
+		 * hold count of 0 and having been marked for deferred destroy,
+		 * it's OK for the origin to have a single clone.
+		 */
+		if (ds->ds_phys->ds_num_children >
+		    (dsda->is_origin_rm ? 2 : 1)) {
+			mutex_exit(&ds->ds_lock);
+			return (EEXIST);
+		}
+		mutex_exit(&ds->ds_lock);
+	} else if (dsl_dir_is_clone(ds->ds_dir)) {
+		return (dsl_dataset_origin_check(dsda, arg2, tx));
+	}
+
+	/* XXX we should do some i/o error checking... */
+	return (0);
+}
+
+struct refsarg {
+	kmutex_t lock;
+	boolean_t gone;
+	kcondvar_t cv;
+};
+
+/* ARGSUSED */
+static void
+dsl_dataset_refs_gone(dmu_buf_t *db, void *argv)
+{
+	struct refsarg *arg = argv;
+
+	mutex_enter(&arg->lock);
+	arg->gone = TRUE;
+	cv_signal(&arg->cv);
+	mutex_exit(&arg->lock);
+}
+
+static void
+dsl_dataset_drain_refs(dsl_dataset_t *ds, void *tag)
+{
+	struct refsarg arg;
+
+	mutex_init(&arg.lock, NULL, MUTEX_DEFAULT, NULL);
+	cv_init(&arg.cv, NULL, CV_DEFAULT, NULL);
+	arg.gone = FALSE;
+	(void) dmu_buf_update_user(ds->ds_dbuf, ds, &arg, &ds->ds_phys,
+	    dsl_dataset_refs_gone);
+	dmu_buf_rele(ds->ds_dbuf, tag);
+	mutex_enter(&arg.lock);
+	while (!arg.gone)
+		cv_wait(&arg.cv, &arg.lock);
+	ASSERT(arg.gone);
+	mutex_exit(&arg.lock);
+	ds->ds_dbuf = NULL;
+	ds->ds_phys = NULL;
+	mutex_destroy(&arg.lock);
+	cv_destroy(&arg.cv);
+}
+
+static void
+remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj, dmu_tx_t *tx)
+{
+	objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
+	uint64_t count;
+	int err;
+
+	ASSERT(ds->ds_phys->ds_num_children >= 2);
+	err = zap_remove_int(mos, ds->ds_phys->ds_next_clones_obj, obj, tx);
+	/*
+	 * The err should not be ENOENT, but a bug in a previous version
+	 * of the code could cause upgrade_clones_cb() to not set
+	 * ds_next_snap_obj when it should, leading to a missing entry.
+	 * If we knew that the pool was created after
+	 * SPA_VERSION_NEXT_CLONES, we could assert that it isn't
+	 * ENOENT.  However, at least we can check that we don't have
+	 * too many entries in the next_clones_obj even after failing to
+	 * remove this one.
+	 */
+	if (err != ENOENT) {
+		VERIFY3U(err, ==, 0);
+	}
+	ASSERT3U(0, ==, zap_count(mos, ds->ds_phys->ds_next_clones_obj,
+	    &count));
+	ASSERT3U(count, <=, ds->ds_phys->ds_num_children - 2);
+}
+
+static void
+dsl_dataset_remove_clones_key(dsl_dataset_t *ds, uint64_t mintxg, dmu_tx_t *tx)
+{
+	objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
+	zap_cursor_t zc;
+	zap_attribute_t za;
+
+	/*
+	 * If it is the old version, dd_clones doesn't exist so we can't
+	 * find the clones, but deadlist_remove_key() is a no-op so it
+	 * doesn't matter.
+	 */
+	if (ds->ds_dir->dd_phys->dd_clones == 0)
+		return;
+
+	for (zap_cursor_init(&zc, mos, ds->ds_dir->dd_phys->dd_clones);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    zap_cursor_advance(&zc)) {
+		dsl_dataset_t *clone;
+
+		VERIFY3U(0, ==, dsl_dataset_hold_obj(ds->ds_dir->dd_pool,
+		    za.za_first_integer, FTAG, &clone));
+		if (clone->ds_dir->dd_origin_txg > mintxg) {
+			dsl_deadlist_remove_key(&clone->ds_deadlist,
+			    mintxg, tx);
+			dsl_dataset_remove_clones_key(clone, mintxg, tx);
+		}
+		dsl_dataset_rele(clone, FTAG);
+	}
+	zap_cursor_fini(&zc);
+}
+
+struct process_old_arg {
+	dsl_dataset_t *ds;
+	dsl_dataset_t *ds_prev;
+	boolean_t after_branch_point;
+	zio_t *pio;
+	uint64_t used, comp, uncomp;
+};
+
+static int
+process_old_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
+{
+	struct process_old_arg *poa = arg;
+	dsl_pool_t *dp = poa->ds->ds_dir->dd_pool;
+
+	if (bp->blk_birth <= poa->ds->ds_phys->ds_prev_snap_txg) {
+		dsl_deadlist_insert(&poa->ds->ds_deadlist, bp, tx);
+		if (poa->ds_prev && !poa->after_branch_point &&
+		    bp->blk_birth >
+		    poa->ds_prev->ds_phys->ds_prev_snap_txg) {
+			poa->ds_prev->ds_phys->ds_unique_bytes +=
+			    bp_get_dsize_sync(dp->dp_spa, bp);
+		}
+	} else {
+		poa->used += bp_get_dsize_sync(dp->dp_spa, bp);
+		poa->comp += BP_GET_PSIZE(bp);
+		poa->uncomp += BP_GET_UCSIZE(bp);
+		dsl_free_sync(poa->pio, dp, tx->tx_txg, bp);
+	}
+	return (0);
+}
+
+static void
+process_old_deadlist(dsl_dataset_t *ds, dsl_dataset_t *ds_prev,
+    dsl_dataset_t *ds_next, boolean_t after_branch_point, dmu_tx_t *tx)
+{
+	struct process_old_arg poa = { 0 };
+	dsl_pool_t *dp = ds->ds_dir->dd_pool;
+	objset_t *mos = dp->dp_meta_objset;
+
+	ASSERT(ds->ds_deadlist.dl_oldfmt);
+	ASSERT(ds_next->ds_deadlist.dl_oldfmt);
+
+	poa.ds = ds;
+	poa.ds_prev = ds_prev;
+	poa.after_branch_point = after_branch_point;
+	poa.pio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
+	VERIFY3U(0, ==, bpobj_iterate(&ds_next->ds_deadlist.dl_bpobj,
+	    process_old_cb, &poa, tx));
+	VERIFY3U(zio_wait(poa.pio), ==, 0);
+	ASSERT3U(poa.used, ==, ds->ds_phys->ds_unique_bytes);
+
+	/* change snapused */
+	dsl_dir_diduse_space(ds->ds_dir, DD_USED_SNAP,
+	    -poa.used, -poa.comp, -poa.uncomp, tx);
+
+	/* swap next's deadlist to our deadlist */
+	dsl_deadlist_close(&ds->ds_deadlist);
+	dsl_deadlist_close(&ds_next->ds_deadlist);
+	SWITCH64(ds_next->ds_phys->ds_deadlist_obj,
+	    ds->ds_phys->ds_deadlist_obj);
+	dsl_deadlist_open(&ds->ds_deadlist, mos, ds->ds_phys->ds_deadlist_obj);
+	dsl_deadlist_open(&ds_next->ds_deadlist, mos,
+	    ds_next->ds_phys->ds_deadlist_obj);
+}
+
+void
+dsl_dataset_destroy_sync(void *arg1, void *tag, dmu_tx_t *tx)
+{
+	struct dsl_ds_destroyarg *dsda = arg1;
+	dsl_dataset_t *ds = dsda->ds;
+	int err;
+	int after_branch_point = FALSE;
+	dsl_pool_t *dp = ds->ds_dir->dd_pool;
+	objset_t *mos = dp->dp_meta_objset;
+	dsl_dataset_t *ds_prev = NULL;
+	boolean_t wont_destroy;
+	uint64_t obj;
+
+	wont_destroy = (dsda->defer &&
+	    (ds->ds_userrefs > 0 || ds->ds_phys->ds_num_children > 1));
+
+	ASSERT(ds->ds_owner || wont_destroy);
+	ASSERT(dsda->defer || ds->ds_phys->ds_num_children <= 1);
+	ASSERT(ds->ds_prev == NULL ||
+	    ds->ds_prev->ds_phys->ds_next_snap_obj != ds->ds_object);
+	ASSERT3U(ds->ds_phys->ds_bp.blk_birth, <=, tx->tx_txg);
+
+	if (wont_destroy) {
+		ASSERT(spa_version(dp->dp_spa) >= SPA_VERSION_USERREFS);
+		dmu_buf_will_dirty(ds->ds_dbuf, tx);
+		ds->ds_phys->ds_flags |= DS_FLAG_DEFER_DESTROY;
+		return;
+	}
+
+	/* signal any waiters that this dataset is going away */
+	mutex_enter(&ds->ds_lock);
+	ds->ds_owner = dsl_reaper;
+	cv_broadcast(&ds->ds_exclusive_cv);
+	mutex_exit(&ds->ds_lock);
+
+	/* Remove our reservation */
+	if (ds->ds_reserved != 0) {
+		dsl_prop_setarg_t psa;
+		uint64_t value = 0;
+
+		dsl_prop_setarg_init_uint64(&psa, "refreservation",
+		    (ZPROP_SRC_NONE | ZPROP_SRC_LOCAL | ZPROP_SRC_RECEIVED),
+		    &value);
+		psa.psa_effective_value = 0;	/* predict default value */
+
+		dsl_dataset_set_reservation_sync(ds, &psa, tx);
+		ASSERT3U(ds->ds_reserved, ==, 0);
+	}
+
+	ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock));
+
+	dsl_scan_ds_destroyed(ds, tx);
+
+	obj = ds->ds_object;
+
+	if (ds->ds_phys->ds_prev_snap_obj != 0) {
+		if (ds->ds_prev) {
+			ds_prev = ds->ds_prev;
+		} else {
+			VERIFY(0 == dsl_dataset_hold_obj(dp,
+			    ds->ds_phys->ds_prev_snap_obj, FTAG, &ds_prev));
+		}
+		after_branch_point =
+		    (ds_prev->ds_phys->ds_next_snap_obj != obj);
+
+		dmu_buf_will_dirty(ds_prev->ds_dbuf, tx);
+		if (after_branch_point &&
+		    ds_prev->ds_phys->ds_next_clones_obj != 0) {
+			remove_from_next_clones(ds_prev, obj, tx);
+			if (ds->ds_phys->ds_next_snap_obj != 0) {
+				VERIFY(0 == zap_add_int(mos,
+				    ds_prev->ds_phys->ds_next_clones_obj,
+				    ds->ds_phys->ds_next_snap_obj, tx));
+			}
+		}
+		if (after_branch_point &&
+		    ds->ds_phys->ds_next_snap_obj == 0) {
+			/* This clone is toast. */
+			ASSERT(ds_prev->ds_phys->ds_num_children > 1);
+			ds_prev->ds_phys->ds_num_children--;
+
+			/*
+			 * If the clone's origin has no other clones, no
+			 * user holds, and has been marked for deferred
+			 * deletion, then we should have done the necessary
+			 * destroy setup for it.
+			 */
+			if (ds_prev->ds_phys->ds_num_children == 1 &&
+			    ds_prev->ds_userrefs == 0 &&
+			    DS_IS_DEFER_DESTROY(ds_prev)) {
+				ASSERT3P(dsda->rm_origin, !=, NULL);
+			} else {
+				ASSERT3P(dsda->rm_origin, ==, NULL);
+			}
+		} else if (!after_branch_point) {
+			ds_prev->ds_phys->ds_next_snap_obj =
+			    ds->ds_phys->ds_next_snap_obj;
+		}
+	}
+
+	if (dsl_dataset_is_snapshot(ds)) {
+		dsl_dataset_t *ds_next;
+		uint64_t old_unique;
+		uint64_t used = 0, comp = 0, uncomp = 0;
+
+		VERIFY(0 == dsl_dataset_hold_obj(dp,
+		    ds->ds_phys->ds_next_snap_obj, FTAG, &ds_next));
+		ASSERT3U(ds_next->ds_phys->ds_prev_snap_obj, ==, obj);
+
+		old_unique = ds_next->ds_phys->ds_unique_bytes;
+
+		dmu_buf_will_dirty(ds_next->ds_dbuf, tx);
+		ds_next->ds_phys->ds_prev_snap_obj =
+		    ds->ds_phys->ds_prev_snap_obj;
+		ds_next->ds_phys->ds_prev_snap_txg =
+		    ds->ds_phys->ds_prev_snap_txg;
+		ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==,
+		    ds_prev ? ds_prev->ds_phys->ds_creation_txg : 0);
+
+
+		if (ds_next->ds_deadlist.dl_oldfmt) {
+			process_old_deadlist(ds, ds_prev, ds_next,
+			    after_branch_point, tx);
+		} else {
+			/* Adjust prev's unique space. */
+			if (ds_prev && !after_branch_point) {
+				dsl_deadlist_space_range(&ds_next->ds_deadlist,
+				    ds_prev->ds_phys->ds_prev_snap_txg,
+				    ds->ds_phys->ds_prev_snap_txg,
+				    &used, &comp, &uncomp);
+				ds_prev->ds_phys->ds_unique_bytes += used;
+			}
+
+			/* Adjust snapused. */
+			dsl_deadlist_space_range(&ds_next->ds_deadlist,
+			    ds->ds_phys->ds_prev_snap_txg, UINT64_MAX,
+			    &used, &comp, &uncomp);
+			dsl_dir_diduse_space(ds->ds_dir, DD_USED_SNAP,
+			    -used, -comp, -uncomp, tx);
+
+			/* Move blocks to be freed to pool's free list. */
+			dsl_deadlist_move_bpobj(&ds_next->ds_deadlist,
+			    &dp->dp_free_bpobj, ds->ds_phys->ds_prev_snap_txg,
+			    tx);
+			dsl_dir_diduse_space(tx->tx_pool->dp_free_dir,
+			    DD_USED_HEAD, used, comp, uncomp, tx);
+			dsl_dir_dirty(tx->tx_pool->dp_free_dir, tx);
+
+			/* Merge our deadlist into next's and free it. */
+			dsl_deadlist_merge(&ds_next->ds_deadlist,
+			    ds->ds_phys->ds_deadlist_obj, tx);
+		}
+		dsl_deadlist_close(&ds->ds_deadlist);
+		dsl_deadlist_free(mos, ds->ds_phys->ds_deadlist_obj, tx);
+
+		/* Collapse range in clone heads */
+		dsl_dataset_remove_clones_key(ds,
+		    ds->ds_phys->ds_creation_txg, tx);
+
+		if (dsl_dataset_is_snapshot(ds_next)) {
+			dsl_dataset_t *ds_nextnext;
+
+			/*
+			 * Update next's unique to include blocks which
+			 * were previously shared by only this snapshot
+			 * and it.  Those blocks will be born after the
+			 * prev snap and before this snap, and will have
+			 * died after the next snap and before the one
+			 * after that (ie. be on the snap after next's
+			 * deadlist).
+			 */
+			VERIFY(0 == dsl_dataset_hold_obj(dp,
+			    ds_next->ds_phys->ds_next_snap_obj,
+			    FTAG, &ds_nextnext));
+			dsl_deadlist_space_range(&ds_nextnext->ds_deadlist,
+			    ds->ds_phys->ds_prev_snap_txg,
+			    ds->ds_phys->ds_creation_txg,
+			    &used, &comp, &uncomp);
+			ds_next->ds_phys->ds_unique_bytes += used;
+			dsl_dataset_rele(ds_nextnext, FTAG);
+			ASSERT3P(ds_next->ds_prev, ==, NULL);
+
+			/* Collapse range in this head. */
+			dsl_dataset_t *hds;
+			VERIFY3U(0, ==, dsl_dataset_hold_obj(dp,
+			    ds->ds_dir->dd_phys->dd_head_dataset_obj,
+			    FTAG, &hds));
+			dsl_deadlist_remove_key(&hds->ds_deadlist,
+			    ds->ds_phys->ds_creation_txg, tx);
+			dsl_dataset_rele(hds, FTAG);
+
+		} else {
+			ASSERT3P(ds_next->ds_prev, ==, ds);
+			dsl_dataset_drop_ref(ds_next->ds_prev, ds_next);
+			ds_next->ds_prev = NULL;
+			if (ds_prev) {
+				VERIFY(0 == dsl_dataset_get_ref(dp,
+				    ds->ds_phys->ds_prev_snap_obj,
+				    ds_next, &ds_next->ds_prev));
+			}
+
+			dsl_dataset_recalc_head_uniq(ds_next);
+
+			/*
+			 * Reduce the amount of our unconsmed refreservation
+			 * being charged to our parent by the amount of
+			 * new unique data we have gained.
+			 */
+			if (old_unique < ds_next->ds_reserved) {
+				int64_t mrsdelta;
+				uint64_t new_unique =
+				    ds_next->ds_phys->ds_unique_bytes;
+
+				ASSERT(old_unique <= new_unique);
+				mrsdelta = MIN(new_unique - old_unique,
+				    ds_next->ds_reserved - old_unique);
+				dsl_dir_diduse_space(ds->ds_dir,
+				    DD_USED_REFRSRV, -mrsdelta, 0, 0, tx);
+			}
+		}
+		dsl_dataset_rele(ds_next, FTAG);
+	} else {
+		/*
+		 * There's no next snapshot, so this is a head dataset.
+		 * Destroy the deadlist.  Unless it's a clone, the
+		 * deadlist should be empty.  (If it's a clone, it's
+		 * safe to ignore the deadlist contents.)
+		 */
+		struct killarg ka;
+
+		dsl_deadlist_close(&ds->ds_deadlist);
+		dsl_deadlist_free(mos, ds->ds_phys->ds_deadlist_obj, tx);
+		ds->ds_phys->ds_deadlist_obj = 0;
+
+		/*
+		 * Free everything that we point to (that's born after
+		 * the previous snapshot, if we are a clone)
+		 *
+		 * NB: this should be very quick, because we already
+		 * freed all the objects in open context.
+		 */
+		ka.ds = ds;
+		ka.tx = tx;
+		err = traverse_dataset(ds, ds->ds_phys->ds_prev_snap_txg,
+		    TRAVERSE_POST, kill_blkptr, &ka);
+		ASSERT3U(err, ==, 0);
+		ASSERT(!DS_UNIQUE_IS_ACCURATE(ds) ||
+		    ds->ds_phys->ds_unique_bytes == 0);
+
+		if (ds->ds_prev != NULL) {
+			if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) {
+				VERIFY3U(0, ==, zap_remove_int(mos,
+				    ds->ds_prev->ds_dir->dd_phys->dd_clones,
+				    ds->ds_object, tx));
+			}
+			dsl_dataset_rele(ds->ds_prev, ds);
+			ds->ds_prev = ds_prev = NULL;
+		}
+	}
+
+	/*
+	 * This must be done after the dsl_traverse(), because it will
+	 * re-open the objset.
+	 */
+	if (ds->ds_objset) {
+		dmu_objset_evict(ds->ds_objset);
+		ds->ds_objset = NULL;
+	}
+
+	if (ds->ds_dir->dd_phys->dd_head_dataset_obj == ds->ds_object) {
+		/* Erase the link in the dir */
+		dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx);
+		ds->ds_dir->dd_phys->dd_head_dataset_obj = 0;
+		ASSERT(ds->ds_phys->ds_snapnames_zapobj != 0);
+		err = zap_destroy(mos, ds->ds_phys->ds_snapnames_zapobj, tx);
+		ASSERT(err == 0);
+	} else {
+		/* remove from snapshot namespace */
+		dsl_dataset_t *ds_head;
+		ASSERT(ds->ds_phys->ds_snapnames_zapobj == 0);
+		VERIFY(0 == dsl_dataset_hold_obj(dp,
+		    ds->ds_dir->dd_phys->dd_head_dataset_obj, FTAG, &ds_head));
+		VERIFY(0 == dsl_dataset_get_snapname(ds));
+#ifdef ZFS_DEBUG
+		{
+			uint64_t val;
+
+			err = dsl_dataset_snap_lookup(ds_head,
+			    ds->ds_snapname, &val);
+			ASSERT3U(err, ==, 0);
+			ASSERT3U(val, ==, obj);
+		}
+#endif
+		err = dsl_dataset_snap_remove(ds_head, ds->ds_snapname, tx);
+		ASSERT(err == 0);
+		dsl_dataset_rele(ds_head, FTAG);
+	}
+
+	if (ds_prev && ds->ds_prev != ds_prev)
+		dsl_dataset_rele(ds_prev, FTAG);
+
+	spa_prop_clear_bootfs(dp->dp_spa, ds->ds_object, tx);
+	spa_history_log_internal(LOG_DS_DESTROY, dp->dp_spa, tx,
+	    "dataset = %llu", ds->ds_object);
+
+	if (ds->ds_phys->ds_next_clones_obj != 0) {
+		uint64_t count;
+		ASSERT(0 == zap_count(mos,
+		    ds->ds_phys->ds_next_clones_obj, &count) && count == 0);
+		VERIFY(0 == dmu_object_free(mos,
+		    ds->ds_phys->ds_next_clones_obj, tx));
+	}
+	if (ds->ds_phys->ds_props_obj != 0)
+		VERIFY(0 == zap_destroy(mos, ds->ds_phys->ds_props_obj, tx));
+	if (ds->ds_phys->ds_userrefs_obj != 0)
+		VERIFY(0 == zap_destroy(mos, ds->ds_phys->ds_userrefs_obj, tx));
+	dsl_dir_close(ds->ds_dir, ds);
+	ds->ds_dir = NULL;
+	dsl_dataset_drain_refs(ds, tag);
+	VERIFY(0 == dmu_object_free(mos, obj, tx));
+
+	if (dsda->rm_origin) {
+		/*
+		 * Remove the origin of the clone we just destroyed.
+		 */
+		struct dsl_ds_destroyarg ndsda = {0};
+
+		ndsda.ds = dsda->rm_origin;
+		dsl_dataset_destroy_sync(&ndsda, tag, tx);
+	}
+}
+
+static int
+dsl_dataset_snapshot_reserve_space(dsl_dataset_t *ds, dmu_tx_t *tx)
+{
+	uint64_t asize;
+
+	if (!dmu_tx_is_syncing(tx))
+		return (0);
+
+	/*
+	 * If there's an fs-only reservation, any blocks that might become
+	 * owned by the snapshot dataset must be accommodated by space
+	 * outside of the reservation.
+	 */
+	ASSERT(ds->ds_reserved == 0 || DS_UNIQUE_IS_ACCURATE(ds));
+	asize = MIN(ds->ds_phys->ds_unique_bytes, ds->ds_reserved);
+	if (asize > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE))
+		return (ENOSPC);
+
+	/*
+	 * Propogate any reserved space for this snapshot to other
+	 * snapshot checks in this sync group.
+	 */
+	if (asize > 0)
+		dsl_dir_willuse_space(ds->ds_dir, asize, tx);
+
+	return (0);
+}
+
+int
+dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	const char *snapname = arg2;
+	int err;
+	uint64_t value;
+
+	/*
+	 * We don't allow multiple snapshots of the same txg.  If there
+	 * is already one, try again.
+	 */
+	if (ds->ds_phys->ds_prev_snap_txg >= tx->tx_txg)
+		return (EAGAIN);
+
+	/*
+	 * Check for conflicting name snapshot name.
+	 */
+	err = dsl_dataset_snap_lookup(ds, snapname, &value);
+	if (err == 0)
+		return (EEXIST);
+	if (err != ENOENT)
+		return (err);
+
+	/*
+	 * Check that the dataset's name is not too long.  Name consists
+	 * of the dataset's length + 1 for the @-sign + snapshot name's length
+	 */
+	if (dsl_dataset_namelen(ds) + 1 + strlen(snapname) >= MAXNAMELEN)
+		return (ENAMETOOLONG);
+
+	err = dsl_dataset_snapshot_reserve_space(ds, tx);
+	if (err)
+		return (err);
+
+	ds->ds_trysnap_txg = tx->tx_txg;
+	return (0);
+}
+
+void
+dsl_dataset_snapshot_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	const char *snapname = arg2;
+	dsl_pool_t *dp = ds->ds_dir->dd_pool;
+	dmu_buf_t *dbuf;
+	dsl_dataset_phys_t *dsphys;
+	uint64_t dsobj, crtxg;
+	objset_t *mos = dp->dp_meta_objset;
+	int err;
+
+	ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock));
+
+	/*
+	 * The origin's ds_creation_txg has to be < TXG_INITIAL
+	 */
+	if (strcmp(snapname, ORIGIN_DIR_NAME) == 0)
+		crtxg = 1;
+	else
+		crtxg = tx->tx_txg;
+
+	dsobj = dmu_object_alloc(mos, DMU_OT_DSL_DATASET, 0,
+	    DMU_OT_DSL_DATASET, sizeof (dsl_dataset_phys_t), tx);
+	VERIFY(0 == dmu_bonus_hold(mos, dsobj, FTAG, &dbuf));
+	dmu_buf_will_dirty(dbuf, tx);
+	dsphys = dbuf->db_data;
+	bzero(dsphys, sizeof (dsl_dataset_phys_t));
+	dsphys->ds_dir_obj = ds->ds_dir->dd_object;
+	dsphys->ds_fsid_guid = unique_create();
+	(void) random_get_pseudo_bytes((void*)&dsphys->ds_guid,
+	    sizeof (dsphys->ds_guid));
+	dsphys->ds_prev_snap_obj = ds->ds_phys->ds_prev_snap_obj;
+	dsphys->ds_prev_snap_txg = ds->ds_phys->ds_prev_snap_txg;
+	dsphys->ds_next_snap_obj = ds->ds_object;
+	dsphys->ds_num_children = 1;
+	dsphys->ds_creation_time = gethrestime_sec();
+	dsphys->ds_creation_txg = crtxg;
+	dsphys->ds_deadlist_obj = ds->ds_phys->ds_deadlist_obj;
+	dsphys->ds_used_bytes = ds->ds_phys->ds_used_bytes;
+	dsphys->ds_compressed_bytes = ds->ds_phys->ds_compressed_bytes;
+	dsphys->ds_uncompressed_bytes = ds->ds_phys->ds_uncompressed_bytes;
+	dsphys->ds_flags = ds->ds_phys->ds_flags;
+	dsphys->ds_bp = ds->ds_phys->ds_bp;
+	dmu_buf_rele(dbuf, FTAG);
+
+	ASSERT3U(ds->ds_prev != 0, ==, ds->ds_phys->ds_prev_snap_obj != 0);
+	if (ds->ds_prev) {
+		uint64_t next_clones_obj =
+		    ds->ds_prev->ds_phys->ds_next_clones_obj;
+		ASSERT(ds->ds_prev->ds_phys->ds_next_snap_obj ==
+		    ds->ds_object ||
+		    ds->ds_prev->ds_phys->ds_num_children > 1);
+		if (ds->ds_prev->ds_phys->ds_next_snap_obj == ds->ds_object) {
+			dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
+			ASSERT3U(ds->ds_phys->ds_prev_snap_txg, ==,
+			    ds->ds_prev->ds_phys->ds_creation_txg);
+			ds->ds_prev->ds_phys->ds_next_snap_obj = dsobj;
+		} else if (next_clones_obj != 0) {
+			remove_from_next_clones(ds->ds_prev,
+			    dsphys->ds_next_snap_obj, tx);
+			VERIFY3U(0, ==, zap_add_int(mos,
+			    next_clones_obj, dsobj, tx));
+		}
+	}
+
+	/*
+	 * If we have a reference-reservation on this dataset, we will
+	 * need to increase the amount of refreservation being charged
+	 * since our unique space is going to zero.
+	 */
+	if (ds->ds_reserved) {
+		int64_t delta;
+		ASSERT(DS_UNIQUE_IS_ACCURATE(ds));
+		delta = MIN(ds->ds_phys->ds_unique_bytes, ds->ds_reserved);
+		dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV,
+		    delta, 0, 0, tx);
+	}
+
+	dmu_buf_will_dirty(ds->ds_dbuf, tx);
+	zfs_dbgmsg("taking snapshot %s@%s/%llu; newkey=%llu",
+	    ds->ds_dir->dd_myname, snapname, dsobj,
+	    ds->ds_phys->ds_prev_snap_txg);
+	ds->ds_phys->ds_deadlist_obj = dsl_deadlist_clone(&ds->ds_deadlist,
+	    UINT64_MAX, ds->ds_phys->ds_prev_snap_obj, tx);
+	dsl_deadlist_close(&ds->ds_deadlist);
+	dsl_deadlist_open(&ds->ds_deadlist, mos, ds->ds_phys->ds_deadlist_obj);
+	dsl_deadlist_add_key(&ds->ds_deadlist,
+	    ds->ds_phys->ds_prev_snap_txg, tx);
+
+	ASSERT3U(ds->ds_phys->ds_prev_snap_txg, <, tx->tx_txg);
+	ds->ds_phys->ds_prev_snap_obj = dsobj;
+	ds->ds_phys->ds_prev_snap_txg = crtxg;
+	ds->ds_phys->ds_unique_bytes = 0;
+	if (spa_version(dp->dp_spa) >= SPA_VERSION_UNIQUE_ACCURATE)
+		ds->ds_phys->ds_flags |= DS_FLAG_UNIQUE_ACCURATE;
+
+	err = zap_add(mos, ds->ds_phys->ds_snapnames_zapobj,
+	    snapname, 8, 1, &dsobj, tx);
+	ASSERT(err == 0);
+
+	if (ds->ds_prev)
+		dsl_dataset_drop_ref(ds->ds_prev, ds);
+	VERIFY(0 == dsl_dataset_get_ref(dp,
+	    ds->ds_phys->ds_prev_snap_obj, ds, &ds->ds_prev));
+
+	dsl_scan_ds_snapshotted(ds, tx);
+
+	dsl_dir_snap_cmtime_update(ds->ds_dir);
+
+	spa_history_log_internal(LOG_DS_SNAPSHOT, dp->dp_spa, tx,
+	    "dataset = %llu", dsobj);
+}
+
+void
+dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx)
+{
+	ASSERT(dmu_tx_is_syncing(tx));
+	ASSERT(ds->ds_objset != NULL);
+	ASSERT(ds->ds_phys->ds_next_snap_obj == 0);
+
+	/*
+	 * in case we had to change ds_fsid_guid when we opened it,
+	 * sync it out now.
+	 */
+	dmu_buf_will_dirty(ds->ds_dbuf, tx);
+	ds->ds_phys->ds_fsid_guid = ds->ds_fsid_guid;
+
+	dsl_dir_dirty(ds->ds_dir, tx);
+	dmu_objset_sync(ds->ds_objset, zio, tx);
+}
+
+void
+dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv)
+{
+	uint64_t refd, avail, uobjs, aobjs;
+
+	dsl_dir_stats(ds->ds_dir, nv);
+
+	dsl_dataset_space(ds, &refd, &avail, &uobjs, &aobjs);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_AVAILABLE, avail);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFERENCED, refd);
+
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATION,
+	    ds->ds_phys->ds_creation_time);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_CREATETXG,
+	    ds->ds_phys->ds_creation_txg);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFQUOTA,
+	    ds->ds_quota);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_REFRESERVATION,
+	    ds->ds_reserved);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_GUID,
+	    ds->ds_phys->ds_guid);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_UNIQUE,
+	    ds->ds_phys->ds_unique_bytes);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_OBJSETID,
+	    ds->ds_object);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERREFS,
+	    ds->ds_userrefs);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_DEFER_DESTROY,
+	    DS_IS_DEFER_DESTROY(ds) ? 1 : 0);
+
+	if (ds->ds_phys->ds_next_snap_obj) {
+		/*
+		 * This is a snapshot; override the dd's space used with
+		 * our unique space and compression ratio.
+		 */
+		dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED,
+		    ds->ds_phys->ds_unique_bytes);
+		dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO,
+		    ds->ds_phys->ds_compressed_bytes == 0 ? 100 :
+		    (ds->ds_phys->ds_uncompressed_bytes * 100 /
+		    ds->ds_phys->ds_compressed_bytes));
+	}
+}
+
+void
+dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat)
+{
+	stat->dds_creation_txg = ds->ds_phys->ds_creation_txg;
+	stat->dds_inconsistent = ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT;
+	stat->dds_guid = ds->ds_phys->ds_guid;
+	if (ds->ds_phys->ds_next_snap_obj) {
+		stat->dds_is_snapshot = B_TRUE;
+		stat->dds_num_clones = ds->ds_phys->ds_num_children - 1;
+	} else {
+		stat->dds_is_snapshot = B_FALSE;
+		stat->dds_num_clones = 0;
+	}
+
+	/* clone origin is really a dsl_dir thing... */
+	rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
+	if (dsl_dir_is_clone(ds->ds_dir)) {
+		dsl_dataset_t *ods;
+
+		VERIFY(0 == dsl_dataset_get_ref(ds->ds_dir->dd_pool,
+		    ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &ods));
+		dsl_dataset_name(ods, stat->dds_origin);
+		dsl_dataset_drop_ref(ods, FTAG);
+	} else {
+		stat->dds_origin[0] = '\0';
+	}
+	rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
+}
+
+uint64_t
+dsl_dataset_fsid_guid(dsl_dataset_t *ds)
+{
+	return (ds->ds_fsid_guid);
+}
+
+void
+dsl_dataset_space(dsl_dataset_t *ds,
+    uint64_t *refdbytesp, uint64_t *availbytesp,
+    uint64_t *usedobjsp, uint64_t *availobjsp)
+{
+	*refdbytesp = ds->ds_phys->ds_used_bytes;
+	*availbytesp = dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE);
+	if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes)
+		*availbytesp += ds->ds_reserved - ds->ds_phys->ds_unique_bytes;
+	if (ds->ds_quota != 0) {
+		/*
+		 * Adjust available bytes according to refquota
+		 */
+		if (*refdbytesp < ds->ds_quota)
+			*availbytesp = MIN(*availbytesp,
+			    ds->ds_quota - *refdbytesp);
+		else
+			*availbytesp = 0;
+	}
+	*usedobjsp = ds->ds_phys->ds_bp.blk_fill;
+	*availobjsp = DN_MAX_OBJECT - *usedobjsp;
+}
+
+boolean_t
+dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds)
+{
+	dsl_pool_t *dp = ds->ds_dir->dd_pool;
+
+	ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) ||
+	    dsl_pool_sync_context(dp));
+	if (ds->ds_prev == NULL)
+		return (B_FALSE);
+	if (ds->ds_phys->ds_bp.blk_birth >
+	    ds->ds_prev->ds_phys->ds_creation_txg) {
+		objset_t *os, *os_prev;
+		/*
+		 * It may be that only the ZIL differs, because it was
+		 * reset in the head.  Don't count that as being
+		 * modified.
+		 */
+		if (dmu_objset_from_ds(ds, &os) != 0)
+			return (B_TRUE);
+		if (dmu_objset_from_ds(ds->ds_prev, &os_prev) != 0)
+			return (B_TRUE);
+		return (bcmp(&os->os_phys->os_meta_dnode,
+		    &os_prev->os_phys->os_meta_dnode,
+		    sizeof (os->os_phys->os_meta_dnode)) != 0);
+	}
+	return (B_FALSE);
+}
+
+/* ARGSUSED */
+static int
+dsl_dataset_snapshot_rename_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	char *newsnapname = arg2;
+	dsl_dir_t *dd = ds->ds_dir;
+	dsl_dataset_t *hds;
+	uint64_t val;
+	int err;
+
+	err = dsl_dataset_hold_obj(dd->dd_pool,
+	    dd->dd_phys->dd_head_dataset_obj, FTAG, &hds);
+	if (err)
+		return (err);
+
+	/* new name better not be in use */
+	err = dsl_dataset_snap_lookup(hds, newsnapname, &val);
+	dsl_dataset_rele(hds, FTAG);
+
+	if (err == 0)
+		err = EEXIST;
+	else if (err == ENOENT)
+		err = 0;
+
+	/* dataset name + 1 for the "@" + the new snapshot name must fit */
+	if (dsl_dir_namelen(ds->ds_dir) + 1 + strlen(newsnapname) >= MAXNAMELEN)
+		err = ENAMETOOLONG;
+
+	return (err);
+}
+
+static void
+dsl_dataset_snapshot_rename_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	const char *newsnapname = arg2;
+	dsl_dir_t *dd = ds->ds_dir;
+	objset_t *mos = dd->dd_pool->dp_meta_objset;
+	dsl_dataset_t *hds;
+	int err;
+
+	ASSERT(ds->ds_phys->ds_next_snap_obj != 0);
+
+	VERIFY(0 == dsl_dataset_hold_obj(dd->dd_pool,
+	    dd->dd_phys->dd_head_dataset_obj, FTAG, &hds));
+
+	VERIFY(0 == dsl_dataset_get_snapname(ds));
+	err = dsl_dataset_snap_remove(hds, ds->ds_snapname, tx);
+	ASSERT3U(err, ==, 0);
+	mutex_enter(&ds->ds_lock);
+	(void) strcpy(ds->ds_snapname, newsnapname);
+	mutex_exit(&ds->ds_lock);
+	err = zap_add(mos, hds->ds_phys->ds_snapnames_zapobj,
+	    ds->ds_snapname, 8, 1, &ds->ds_object, tx);
+	ASSERT3U(err, ==, 0);
+
+	spa_history_log_internal(LOG_DS_RENAME, dd->dd_pool->dp_spa, tx,
+	    "dataset = %llu", ds->ds_object);
+	dsl_dataset_rele(hds, FTAG);
+}
+
+struct renamesnaparg {
+	dsl_sync_task_group_t *dstg;
+	char failed[MAXPATHLEN];
+	char *oldsnap;
+	char *newsnap;
+};
+
+static int
+dsl_snapshot_rename_one(const char *name, void *arg)
+{
+	struct renamesnaparg *ra = arg;
+	dsl_dataset_t *ds = NULL;
+	char *snapname;
+	int err;
+
+	snapname = kmem_asprintf("%s@%s", name, ra->oldsnap);
+	(void) strlcpy(ra->failed, snapname, sizeof (ra->failed));
+
+	/*
+	 * For recursive snapshot renames the parent won't be changing
+	 * so we just pass name for both the to/from argument.
+	 */
+	err = zfs_secpolicy_rename_perms(snapname, snapname, CRED());
+	if (err != 0) {
+		strfree(snapname);
+		return (err == ENOENT ? 0 : err);
+	}
+
+#ifdef _KERNEL
+	/*
+	 * For all filesystems undergoing rename, we'll need to unmount it.
+	 */
+	(void) zfs_unmount_snap(snapname, NULL);
+#endif
+	err = dsl_dataset_hold(snapname, ra->dstg, &ds);
+	strfree(snapname);
+	if (err != 0)
+		return (err == ENOENT ? 0 : err);
+
+	dsl_sync_task_create(ra->dstg, dsl_dataset_snapshot_rename_check,
+	    dsl_dataset_snapshot_rename_sync, ds, ra->newsnap, 0);
+
+	return (0);
+}
+
+static int
+dsl_recursive_rename(char *oldname, const char *newname)
+{
+	int err;
+	struct renamesnaparg *ra;
+	dsl_sync_task_t *dst;
+	spa_t *spa;
+	char *cp, *fsname = spa_strdup(oldname);
+	int len = strlen(oldname) + 1;
+
+	/* truncate the snapshot name to get the fsname */
+	cp = strchr(fsname, '@');
+	*cp = '\0';
+
+	err = spa_open(fsname, &spa, FTAG);
+	if (err) {
+		kmem_free(fsname, len);
+		return (err);
+	}
+	ra = kmem_alloc(sizeof (struct renamesnaparg), KM_SLEEP);
+	ra->dstg = dsl_sync_task_group_create(spa_get_dsl(spa));
+
+	ra->oldsnap = strchr(oldname, '@') + 1;
+	ra->newsnap = strchr(newname, '@') + 1;
+	*ra->failed = '\0';
+
+	err = dmu_objset_find(fsname, dsl_snapshot_rename_one, ra,
+	    DS_FIND_CHILDREN);
+	kmem_free(fsname, len);
+
+	if (err == 0) {
+		err = dsl_sync_task_group_wait(ra->dstg);
+	}
+
+	for (dst = list_head(&ra->dstg->dstg_tasks); dst;
+	    dst = list_next(&ra->dstg->dstg_tasks, dst)) {
+		dsl_dataset_t *ds = dst->dst_arg1;
+		if (dst->dst_err) {
+			dsl_dir_name(ds->ds_dir, ra->failed);
+			(void) strlcat(ra->failed, "@", sizeof (ra->failed));
+			(void) strlcat(ra->failed, ra->newsnap,
+			    sizeof (ra->failed));
+		}
+		dsl_dataset_rele(ds, ra->dstg);
+	}
+
+	if (err)
+		(void) strlcpy(oldname, ra->failed, sizeof (ra->failed));
+
+	dsl_sync_task_group_destroy(ra->dstg);
+	kmem_free(ra, sizeof (struct renamesnaparg));
+	spa_close(spa, FTAG);
+	return (err);
+}
+
+static int
+dsl_valid_rename(const char *oldname, void *arg)
+{
+	int delta = *(int *)arg;
+
+	if (strlen(oldname) + delta >= MAXNAMELEN)
+		return (ENAMETOOLONG);
+
+	return (0);
+}
+
+#pragma weak dmu_objset_rename = dsl_dataset_rename
+int
+dsl_dataset_rename(char *oldname, const char *newname, boolean_t recursive)
+{
+	dsl_dir_t *dd;
+	dsl_dataset_t *ds;
+	const char *tail;
+	int err;
+
+	err = dsl_dir_open(oldname, FTAG, &dd, &tail);
+	if (err)
+		return (err);
+
+	if (tail == NULL) {
+		int delta = strlen(newname) - strlen(oldname);
+
+		/* if we're growing, validate child name lengths */
+		if (delta > 0)
+			err = dmu_objset_find(oldname, dsl_valid_rename,
+			    &delta, DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS);
+
+		if (err == 0)
+			err = dsl_dir_rename(dd, newname);
+		dsl_dir_close(dd, FTAG);
+		return (err);
+	}
+
+	if (tail[0] != '@') {
+		/* the name ended in a nonexistent component */
+		dsl_dir_close(dd, FTAG);
+		return (ENOENT);
+	}
+
+	dsl_dir_close(dd, FTAG);
+
+	/* new name must be snapshot in same filesystem */
+	tail = strchr(newname, '@');
+	if (tail == NULL)
+		return (EINVAL);
+	tail++;
+	if (strncmp(oldname, newname, tail - newname) != 0)
+		return (EXDEV);
+
+	if (recursive) {
+		err = dsl_recursive_rename(oldname, newname);
+	} else {
+		err = dsl_dataset_hold(oldname, FTAG, &ds);
+		if (err)
+			return (err);
+
+		err = dsl_sync_task_do(ds->ds_dir->dd_pool,
+		    dsl_dataset_snapshot_rename_check,
+		    dsl_dataset_snapshot_rename_sync, ds, (char *)tail, 1);
+
+		dsl_dataset_rele(ds, FTAG);
+	}
+
+	return (err);
+}
+
+struct promotenode {
+	list_node_t link;
+	dsl_dataset_t *ds;
+};
+
+struct promotearg {
+	list_t shared_snaps, origin_snaps, clone_snaps;
+	dsl_dataset_t *origin_origin;
+	uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap;
+	char *err_ds;
+};
+
+static int snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep);
+static boolean_t snaplist_unstable(list_t *l);
+
+static int
+dsl_dataset_promote_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *hds = arg1;
+	struct promotearg *pa = arg2;
+	struct promotenode *snap = list_head(&pa->shared_snaps);
+	dsl_dataset_t *origin_ds = snap->ds;
+	int err;
+	uint64_t unused;
+
+	/* Check that it is a real clone */
+	if (!dsl_dir_is_clone(hds->ds_dir))
+		return (EINVAL);
+
+	/* Since this is so expensive, don't do the preliminary check */
+	if (!dmu_tx_is_syncing(tx))
+		return (0);
+
+	if (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE)
+		return (EXDEV);
+
+	/* compute origin's new unique space */
+	snap = list_tail(&pa->clone_snaps);
+	ASSERT3U(snap->ds->ds_phys->ds_prev_snap_obj, ==, origin_ds->ds_object);
+	dsl_deadlist_space_range(&snap->ds->ds_deadlist,
+	    origin_ds->ds_phys->ds_prev_snap_txg, UINT64_MAX,
+	    &pa->unique, &unused, &unused);
+
+	/*
+	 * Walk the snapshots that we are moving
+	 *
+	 * Compute space to transfer.  Consider the incremental changes
+	 * to used for each snapshot:
+	 * (my used) = (prev's used) + (blocks born) - (blocks killed)
+	 * So each snapshot gave birth to:
+	 * (blocks born) = (my used) - (prev's used) + (blocks killed)
+	 * So a sequence would look like:
+	 * (uN - u(N-1) + kN) + ... + (u1 - u0 + k1) + (u0 - 0 + k0)
+	 * Which simplifies to:
+	 * uN + kN + kN-1 + ... + k1 + k0
+	 * Note however, if we stop before we reach the ORIGIN we get:
+	 * uN + kN + kN-1 + ... + kM - uM-1
+	 */
+	pa->used = origin_ds->ds_phys->ds_used_bytes;
+	pa->comp = origin_ds->ds_phys->ds_compressed_bytes;
+	pa->uncomp = origin_ds->ds_phys->ds_uncompressed_bytes;
+	for (snap = list_head(&pa->shared_snaps); snap;
+	    snap = list_next(&pa->shared_snaps, snap)) {
+		uint64_t val, dlused, dlcomp, dluncomp;
+		dsl_dataset_t *ds = snap->ds;
+
+		/* Check that the snapshot name does not conflict */
+		VERIFY(0 == dsl_dataset_get_snapname(ds));
+		err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val);
+		if (err == 0) {
+			err = EEXIST;
+			goto out;
+		}
+		if (err != ENOENT)
+			goto out;
+
+		/* The very first snapshot does not have a deadlist */
+		if (ds->ds_phys->ds_prev_snap_obj == 0)
+			continue;
+
+		dsl_deadlist_space(&ds->ds_deadlist,
+		    &dlused, &dlcomp, &dluncomp);
+		pa->used += dlused;
+		pa->comp += dlcomp;
+		pa->uncomp += dluncomp;
+	}
+
+	/*
+	 * If we are a clone of a clone then we never reached ORIGIN,
+	 * so we need to subtract out the clone origin's used space.
+	 */
+	if (pa->origin_origin) {
+		pa->used -= pa->origin_origin->ds_phys->ds_used_bytes;
+		pa->comp -= pa->origin_origin->ds_phys->ds_compressed_bytes;
+		pa->uncomp -= pa->origin_origin->ds_phys->ds_uncompressed_bytes;
+	}
+
+	/* Check that there is enough space here */
+	err = dsl_dir_transfer_possible(origin_ds->ds_dir, hds->ds_dir,
+	    pa->used);
+	if (err)
+		return (err);
+
+	/*
+	 * Compute the amounts of space that will be used by snapshots
+	 * after the promotion (for both origin and clone).  For each,
+	 * it is the amount of space that will be on all of their
+	 * deadlists (that was not born before their new origin).
+	 */
+	if (hds->ds_dir->dd_phys->dd_flags & DD_FLAG_USED_BREAKDOWN) {
+		uint64_t space;
+
+		/*
+		 * Note, typically this will not be a clone of a clone,
+		 * so dd_origin_txg will be < TXG_INITIAL, so
+		 * these snaplist_space() -> dsl_deadlist_space_range()
+		 * calls will be fast because they do not have to
+		 * iterate over all bps.
+		 */
+		snap = list_head(&pa->origin_snaps);
+		err = snaplist_space(&pa->shared_snaps,
+		    snap->ds->ds_dir->dd_origin_txg, &pa->cloneusedsnap);
+		if (err)
+			return (err);
+
+		err = snaplist_space(&pa->clone_snaps,
+		    snap->ds->ds_dir->dd_origin_txg, &space);
+		if (err)
+			return (err);
+		pa->cloneusedsnap += space;
+	}
+	if (origin_ds->ds_dir->dd_phys->dd_flags & DD_FLAG_USED_BREAKDOWN) {
+		err = snaplist_space(&pa->origin_snaps,
+		    origin_ds->ds_phys->ds_creation_txg, &pa->originusedsnap);
+		if (err)
+			return (err);
+	}
+
+	return (0);
+out:
+	pa->err_ds =  snap->ds->ds_snapname;
+	return (err);
+}
+
+static void
+dsl_dataset_promote_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *hds = arg1;
+	struct promotearg *pa = arg2;
+	struct promotenode *snap = list_head(&pa->shared_snaps);
+	dsl_dataset_t *origin_ds = snap->ds;
+	dsl_dataset_t *origin_head;
+	dsl_dir_t *dd = hds->ds_dir;
+	dsl_pool_t *dp = hds->ds_dir->dd_pool;
+	dsl_dir_t *odd = NULL;
+	uint64_t oldnext_obj;
+	int64_t delta;
+
+	ASSERT(0 == (hds->ds_phys->ds_flags & DS_FLAG_NOPROMOTE));
+
+	snap = list_head(&pa->origin_snaps);
+	origin_head = snap->ds;
+
+	/*
+	 * We need to explicitly open odd, since origin_ds's dd will be
+	 * changing.
+	 */
+	VERIFY(0 == dsl_dir_open_obj(dp, origin_ds->ds_dir->dd_object,
+	    NULL, FTAG, &odd));
+
+	/* change origin's next snap */
+	dmu_buf_will_dirty(origin_ds->ds_dbuf, tx);
+	oldnext_obj = origin_ds->ds_phys->ds_next_snap_obj;
+	snap = list_tail(&pa->clone_snaps);
+	ASSERT3U(snap->ds->ds_phys->ds_prev_snap_obj, ==, origin_ds->ds_object);
+	origin_ds->ds_phys->ds_next_snap_obj = snap->ds->ds_object;
+
+	/* change the origin's next clone */
+	if (origin_ds->ds_phys->ds_next_clones_obj) {
+		remove_from_next_clones(origin_ds, snap->ds->ds_object, tx);
+		VERIFY3U(0, ==, zap_add_int(dp->dp_meta_objset,
+		    origin_ds->ds_phys->ds_next_clones_obj,
+		    oldnext_obj, tx));
+	}
+
+	/* change origin */
+	dmu_buf_will_dirty(dd->dd_dbuf, tx);
+	ASSERT3U(dd->dd_phys->dd_origin_obj, ==, origin_ds->ds_object);
+	dd->dd_phys->dd_origin_obj = odd->dd_phys->dd_origin_obj;
+	dd->dd_origin_txg = origin_head->ds_dir->dd_origin_txg;
+	dmu_buf_will_dirty(odd->dd_dbuf, tx);
+	odd->dd_phys->dd_origin_obj = origin_ds->ds_object;
+	origin_head->ds_dir->dd_origin_txg =
+	    origin_ds->ds_phys->ds_creation_txg;
+
+	/* change dd_clone entries */
+	if (spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) {
+		VERIFY3U(0, ==, zap_remove_int(dp->dp_meta_objset,
+		    odd->dd_phys->dd_clones, hds->ds_object, tx));
+		VERIFY3U(0, ==, zap_add_int(dp->dp_meta_objset,
+		    pa->origin_origin->ds_dir->dd_phys->dd_clones,
+		    hds->ds_object, tx));
+
+		VERIFY3U(0, ==, zap_remove_int(dp->dp_meta_objset,
+		    pa->origin_origin->ds_dir->dd_phys->dd_clones,
+		    origin_head->ds_object, tx));
+		if (dd->dd_phys->dd_clones == 0) {
+			dd->dd_phys->dd_clones = zap_create(dp->dp_meta_objset,
+			    DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx);
+		}
+		VERIFY3U(0, ==, zap_add_int(dp->dp_meta_objset,
+		    dd->dd_phys->dd_clones, origin_head->ds_object, tx));
+
+	}
+
+	/* move snapshots to this dir */
+	for (snap = list_head(&pa->shared_snaps); snap;
+	    snap = list_next(&pa->shared_snaps, snap)) {
+		dsl_dataset_t *ds = snap->ds;
+
+		/* unregister props as dsl_dir is changing */
+		if (ds->ds_objset) {
+			dmu_objset_evict(ds->ds_objset);
+			ds->ds_objset = NULL;
+		}
+		/* move snap name entry */
+		VERIFY(0 == dsl_dataset_get_snapname(ds));
+		VERIFY(0 == dsl_dataset_snap_remove(origin_head,
+		    ds->ds_snapname, tx));
+		VERIFY(0 == zap_add(dp->dp_meta_objset,
+		    hds->ds_phys->ds_snapnames_zapobj, ds->ds_snapname,
+		    8, 1, &ds->ds_object, tx));
+
+		/* change containing dsl_dir */
+		dmu_buf_will_dirty(ds->ds_dbuf, tx);
+		ASSERT3U(ds->ds_phys->ds_dir_obj, ==, odd->dd_object);
+		ds->ds_phys->ds_dir_obj = dd->dd_object;
+		ASSERT3P(ds->ds_dir, ==, odd);
+		dsl_dir_close(ds->ds_dir, ds);
+		VERIFY(0 == dsl_dir_open_obj(dp, dd->dd_object,
+		    NULL, ds, &ds->ds_dir));
+
+		/* move any clone references */
+		if (ds->ds_phys->ds_next_clones_obj &&
+		    spa_version(dp->dp_spa) >= SPA_VERSION_DIR_CLONES) {
+			zap_cursor_t zc;
+			zap_attribute_t za;
+
+			for (zap_cursor_init(&zc, dp->dp_meta_objset,
+			    ds->ds_phys->ds_next_clones_obj);
+			    zap_cursor_retrieve(&zc, &za) == 0;
+			    zap_cursor_advance(&zc)) {
+				dsl_dataset_t *cnds;
+				uint64_t o;
+
+				if (za.za_first_integer == oldnext_obj) {
+					/*
+					 * We've already moved the
+					 * origin's reference.
+					 */
+					continue;
+				}
+
+				VERIFY3U(0, ==, dsl_dataset_hold_obj(dp,
+				    za.za_first_integer, FTAG, &cnds));
+				o = cnds->ds_dir->dd_phys->dd_head_dataset_obj;
+
+				VERIFY3U(zap_remove_int(dp->dp_meta_objset,
+				    odd->dd_phys->dd_clones, o, tx), ==, 0);
+				VERIFY3U(zap_add_int(dp->dp_meta_objset,
+				    dd->dd_phys->dd_clones, o, tx), ==, 0);
+				dsl_dataset_rele(cnds, FTAG);
+			}
+			zap_cursor_fini(&zc);
+		}
+
+		ASSERT3U(dsl_prop_numcb(ds), ==, 0);
+	}
+
+	/*
+	 * Change space accounting.
+	 * Note, pa->*usedsnap and dd_used_breakdown[SNAP] will either
+	 * both be valid, or both be 0 (resulting in delta == 0).  This
+	 * is true for each of {clone,origin} independently.
+	 */
+
+	delta = pa->cloneusedsnap -
+	    dd->dd_phys->dd_used_breakdown[DD_USED_SNAP];
+	ASSERT3S(delta, >=, 0);
+	ASSERT3U(pa->used, >=, delta);
+	dsl_dir_diduse_space(dd, DD_USED_SNAP, delta, 0, 0, tx);
+	dsl_dir_diduse_space(dd, DD_USED_HEAD,
+	    pa->used - delta, pa->comp, pa->uncomp, tx);
+
+	delta = pa->originusedsnap -
+	    odd->dd_phys->dd_used_breakdown[DD_USED_SNAP];
+	ASSERT3S(delta, <=, 0);
+	ASSERT3U(pa->used, >=, -delta);
+	dsl_dir_diduse_space(odd, DD_USED_SNAP, delta, 0, 0, tx);
+	dsl_dir_diduse_space(odd, DD_USED_HEAD,
+	    -pa->used - delta, -pa->comp, -pa->uncomp, tx);
+
+	origin_ds->ds_phys->ds_unique_bytes = pa->unique;
+
+	/* log history record */
+	spa_history_log_internal(LOG_DS_PROMOTE, dd->dd_pool->dp_spa, tx,
+	    "dataset = %llu", hds->ds_object);
+
+	dsl_dir_close(odd, FTAG);
+}
+
+static char *snaplist_tag = "snaplist";
+/*
+ * Make a list of dsl_dataset_t's for the snapshots between first_obj
+ * (exclusive) and last_obj (inclusive).  The list will be in reverse
+ * order (last_obj will be the list_head()).  If first_obj == 0, do all
+ * snapshots back to this dataset's origin.
+ */
+static int
+snaplist_make(dsl_pool_t *dp, boolean_t own,
+    uint64_t first_obj, uint64_t last_obj, list_t *l)
+{
+	uint64_t obj = last_obj;
+
+	ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock));
+
+	list_create(l, sizeof (struct promotenode),
+	    offsetof(struct promotenode, link));
+
+	while (obj != first_obj) {
+		dsl_dataset_t *ds;
+		struct promotenode *snap;
+		int err;
+
+		if (own) {
+			err = dsl_dataset_own_obj(dp, obj,
+			    0, snaplist_tag, &ds);
+			if (err == 0)
+				dsl_dataset_make_exclusive(ds, snaplist_tag);
+		} else {
+			err = dsl_dataset_hold_obj(dp, obj, snaplist_tag, &ds);
+		}
+		if (err == ENOENT) {
+			/* lost race with snapshot destroy */
+			struct promotenode *last = list_tail(l);
+			ASSERT(obj != last->ds->ds_phys->ds_prev_snap_obj);
+			obj = last->ds->ds_phys->ds_prev_snap_obj;
+			continue;
+		} else if (err) {
+			return (err);
+		}
+
+		if (first_obj == 0)
+			first_obj = ds->ds_dir->dd_phys->dd_origin_obj;
+
+		snap = kmem_alloc(sizeof (struct promotenode), KM_SLEEP);
+		snap->ds = ds;
+		list_insert_tail(l, snap);
+		obj = ds->ds_phys->ds_prev_snap_obj;
+	}
+
+	return (0);
+}
+
+static int
+snaplist_space(list_t *l, uint64_t mintxg, uint64_t *spacep)
+{
+	struct promotenode *snap;
+
+	*spacep = 0;
+	for (snap = list_head(l); snap; snap = list_next(l, snap)) {
+		uint64_t used, comp, uncomp;
+		dsl_deadlist_space_range(&snap->ds->ds_deadlist,
+		    mintxg, UINT64_MAX, &used, &comp, &uncomp);
+		*spacep += used;
+	}
+	return (0);
+}
+
+static void
+snaplist_destroy(list_t *l, boolean_t own)
+{
+	struct promotenode *snap;
+
+	if (!l || !list_link_active(&l->list_head))
+		return;
+
+	while ((snap = list_tail(l)) != NULL) {
+		list_remove(l, snap);
+		if (own)
+			dsl_dataset_disown(snap->ds, snaplist_tag);
+		else
+			dsl_dataset_rele(snap->ds, snaplist_tag);
+		kmem_free(snap, sizeof (struct promotenode));
+	}
+	list_destroy(l);
+}
+
+/*
+ * Promote a clone.  Nomenclature note:
+ * "clone" or "cds": the original clone which is being promoted
+ * "origin" or "ods": the snapshot which is originally clone's origin
+ * "origin head" or "ohds": the dataset which is the head
+ * (filesystem/volume) for the origin
+ * "origin origin": the origin of the origin's filesystem (typically
+ * NULL, indicating that the clone is not a clone of a clone).
+ */
+int
+dsl_dataset_promote(const char *name, char *conflsnap)
+{
+	dsl_dataset_t *ds;
+	dsl_dir_t *dd;
+	dsl_pool_t *dp;
+	dmu_object_info_t doi;
+	struct promotearg pa = { 0 };
+	struct promotenode *snap;
+	int err;
+
+	err = dsl_dataset_hold(name, FTAG, &ds);
+	if (err)
+		return (err);
+	dd = ds->ds_dir;
+	dp = dd->dd_pool;
+
+	err = dmu_object_info(dp->dp_meta_objset,
+	    ds->ds_phys->ds_snapnames_zapobj, &doi);
+	if (err) {
+		dsl_dataset_rele(ds, FTAG);
+		return (err);
+	}
+
+	if (dsl_dataset_is_snapshot(ds) || dd->dd_phys->dd_origin_obj == 0) {
+		dsl_dataset_rele(ds, FTAG);
+		return (EINVAL);
+	}
+
+	/*
+	 * We are going to inherit all the snapshots taken before our
+	 * origin (i.e., our new origin will be our parent's origin).
+	 * Take ownership of them so that we can rename them into our
+	 * namespace.
+	 */
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+
+	err = snaplist_make(dp, B_TRUE, 0, dd->dd_phys->dd_origin_obj,
+	    &pa.shared_snaps);
+	if (err != 0)
+		goto out;
+
+	err = snaplist_make(dp, B_FALSE, 0, ds->ds_object, &pa.clone_snaps);
+	if (err != 0)
+		goto out;
+
+	snap = list_head(&pa.shared_snaps);
+	ASSERT3U(snap->ds->ds_object, ==, dd->dd_phys->dd_origin_obj);
+	err = snaplist_make(dp, B_FALSE, dd->dd_phys->dd_origin_obj,
+	    snap->ds->ds_dir->dd_phys->dd_head_dataset_obj, &pa.origin_snaps);
+	if (err != 0)
+		goto out;
+
+	if (snap->ds->ds_dir->dd_phys->dd_origin_obj != 0) {
+		err = dsl_dataset_hold_obj(dp,
+		    snap->ds->ds_dir->dd_phys->dd_origin_obj,
+		    FTAG, &pa.origin_origin);
+		if (err != 0)
+			goto out;
+	}
+
+out:
+	rw_exit(&dp->dp_config_rwlock);
+
+	/*
+	 * Add in 128x the snapnames zapobj size, since we will be moving
+	 * a bunch of snapnames to the promoted ds, and dirtying their
+	 * bonus buffers.
+	 */
+	if (err == 0) {
+		err = dsl_sync_task_do(dp, dsl_dataset_promote_check,
+		    dsl_dataset_promote_sync, ds, &pa,
+		    2 + 2 * doi.doi_physical_blocks_512);
+		if (err && pa.err_ds && conflsnap)
+			(void) strncpy(conflsnap, pa.err_ds, MAXNAMELEN);
+	}
+
+	snaplist_destroy(&pa.shared_snaps, B_TRUE);
+	snaplist_destroy(&pa.clone_snaps, B_FALSE);
+	snaplist_destroy(&pa.origin_snaps, B_FALSE);
+	if (pa.origin_origin)
+		dsl_dataset_rele(pa.origin_origin, FTAG);
+	dsl_dataset_rele(ds, FTAG);
+	return (err);
+}
+
+struct cloneswaparg {
+	dsl_dataset_t *cds; /* clone dataset */
+	dsl_dataset_t *ohds; /* origin's head dataset */
+	boolean_t force;
+	int64_t unused_refres_delta; /* change in unconsumed refreservation */
+};
+
+/* ARGSUSED */
+static int
+dsl_dataset_clone_swap_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	struct cloneswaparg *csa = arg1;
+
+	/* they should both be heads */
+	if (dsl_dataset_is_snapshot(csa->cds) ||
+	    dsl_dataset_is_snapshot(csa->ohds))
+		return (EINVAL);
+
+	/* the branch point should be just before them */
+	if (csa->cds->ds_prev != csa->ohds->ds_prev)
+		return (EINVAL);
+
+	/* cds should be the clone (unless they are unrelated) */
+	if (csa->cds->ds_prev != NULL &&
+	    csa->cds->ds_prev != csa->cds->ds_dir->dd_pool->dp_origin_snap &&
+	    csa->ohds->ds_object !=
+	    csa->cds->ds_prev->ds_phys->ds_next_snap_obj)
+		return (EINVAL);
+
+	/* the clone should be a child of the origin */
+	if (csa->cds->ds_dir->dd_parent != csa->ohds->ds_dir)
+		return (EINVAL);
+
+	/* ohds shouldn't be modified unless 'force' */
+	if (!csa->force && dsl_dataset_modified_since_lastsnap(csa->ohds))
+		return (ETXTBSY);
+
+	/* adjust amount of any unconsumed refreservation */
+	csa->unused_refres_delta =
+	    (int64_t)MIN(csa->ohds->ds_reserved,
+	    csa->ohds->ds_phys->ds_unique_bytes) -
+	    (int64_t)MIN(csa->ohds->ds_reserved,
+	    csa->cds->ds_phys->ds_unique_bytes);
+
+	if (csa->unused_refres_delta > 0 &&
+	    csa->unused_refres_delta >
+	    dsl_dir_space_available(csa->ohds->ds_dir, NULL, 0, TRUE))
+		return (ENOSPC);
+
+	if (csa->ohds->ds_quota != 0 &&
+	    csa->cds->ds_phys->ds_unique_bytes > csa->ohds->ds_quota)
+		return (EDQUOT);
+
+	return (0);
+}
+
+/* ARGSUSED */
+static void
+dsl_dataset_clone_swap_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	struct cloneswaparg *csa = arg1;
+	dsl_pool_t *dp = csa->cds->ds_dir->dd_pool;
+
+	ASSERT(csa->cds->ds_reserved == 0);
+	ASSERT(csa->ohds->ds_quota == 0 ||
+	    csa->cds->ds_phys->ds_unique_bytes <= csa->ohds->ds_quota);
+
+	dmu_buf_will_dirty(csa->cds->ds_dbuf, tx);
+	dmu_buf_will_dirty(csa->ohds->ds_dbuf, tx);
+
+	if (csa->cds->ds_objset != NULL) {
+		dmu_objset_evict(csa->cds->ds_objset);
+		csa->cds->ds_objset = NULL;
+	}
+
+	if (csa->ohds->ds_objset != NULL) {
+		dmu_objset_evict(csa->ohds->ds_objset);
+		csa->ohds->ds_objset = NULL;
+	}
+
+	/*
+	 * Reset origin's unique bytes, if it exists.
+	 */
+	if (csa->cds->ds_prev) {
+		dsl_dataset_t *origin = csa->cds->ds_prev;
+		uint64_t comp, uncomp;
+
+		dmu_buf_will_dirty(origin->ds_dbuf, tx);
+		dsl_deadlist_space_range(&csa->cds->ds_deadlist,
+		    origin->ds_phys->ds_prev_snap_txg, UINT64_MAX,
+		    &origin->ds_phys->ds_unique_bytes, &comp, &uncomp);
+	}
+
+	/* swap blkptrs */
+	{
+		blkptr_t tmp;
+		tmp = csa->ohds->ds_phys->ds_bp;
+		csa->ohds->ds_phys->ds_bp = csa->cds->ds_phys->ds_bp;
+		csa->cds->ds_phys->ds_bp = tmp;
+	}
+
+	/* set dd_*_bytes */
+	{
+		int64_t dused, dcomp, duncomp;
+		uint64_t cdl_used, cdl_comp, cdl_uncomp;
+		uint64_t odl_used, odl_comp, odl_uncomp;
+
+		ASSERT3U(csa->cds->ds_dir->dd_phys->
+		    dd_used_breakdown[DD_USED_SNAP], ==, 0);
+
+		dsl_deadlist_space(&csa->cds->ds_deadlist,
+		    &cdl_used, &cdl_comp, &cdl_uncomp);
+		dsl_deadlist_space(&csa->ohds->ds_deadlist,
+		    &odl_used, &odl_comp, &odl_uncomp);
+
+		dused = csa->cds->ds_phys->ds_used_bytes + cdl_used -
+		    (csa->ohds->ds_phys->ds_used_bytes + odl_used);
+		dcomp = csa->cds->ds_phys->ds_compressed_bytes + cdl_comp -
+		    (csa->ohds->ds_phys->ds_compressed_bytes + odl_comp);
+		duncomp = csa->cds->ds_phys->ds_uncompressed_bytes +
+		    cdl_uncomp -
+		    (csa->ohds->ds_phys->ds_uncompressed_bytes + odl_uncomp);
+
+		dsl_dir_diduse_space(csa->ohds->ds_dir, DD_USED_HEAD,
+		    dused, dcomp, duncomp, tx);
+		dsl_dir_diduse_space(csa->cds->ds_dir, DD_USED_HEAD,
+		    -dused, -dcomp, -duncomp, tx);
+
+		/*
+		 * The difference in the space used by snapshots is the
+		 * difference in snapshot space due to the head's
+		 * deadlist (since that's the only thing that's
+		 * changing that affects the snapused).
+		 */
+		dsl_deadlist_space_range(&csa->cds->ds_deadlist,
+		    csa->ohds->ds_dir->dd_origin_txg, UINT64_MAX,
+		    &cdl_used, &cdl_comp, &cdl_uncomp);
+		dsl_deadlist_space_range(&csa->ohds->ds_deadlist,
+		    csa->ohds->ds_dir->dd_origin_txg, UINT64_MAX,
+		    &odl_used, &odl_comp, &odl_uncomp);
+		dsl_dir_transfer_space(csa->ohds->ds_dir, cdl_used - odl_used,
+		    DD_USED_HEAD, DD_USED_SNAP, tx);
+	}
+
+	/* swap ds_*_bytes */
+	SWITCH64(csa->ohds->ds_phys->ds_used_bytes,
+	    csa->cds->ds_phys->ds_used_bytes);
+	SWITCH64(csa->ohds->ds_phys->ds_compressed_bytes,
+	    csa->cds->ds_phys->ds_compressed_bytes);
+	SWITCH64(csa->ohds->ds_phys->ds_uncompressed_bytes,
+	    csa->cds->ds_phys->ds_uncompressed_bytes);
+	SWITCH64(csa->ohds->ds_phys->ds_unique_bytes,
+	    csa->cds->ds_phys->ds_unique_bytes);
+
+	/* apply any parent delta for change in unconsumed refreservation */
+	dsl_dir_diduse_space(csa->ohds->ds_dir, DD_USED_REFRSRV,
+	    csa->unused_refres_delta, 0, 0, tx);
+
+	/*
+	 * Swap deadlists.
+	 */
+	dsl_deadlist_close(&csa->cds->ds_deadlist);
+	dsl_deadlist_close(&csa->ohds->ds_deadlist);
+	SWITCH64(csa->ohds->ds_phys->ds_deadlist_obj,
+	    csa->cds->ds_phys->ds_deadlist_obj);
+	dsl_deadlist_open(&csa->cds->ds_deadlist, dp->dp_meta_objset,
+	    csa->cds->ds_phys->ds_deadlist_obj);
+	dsl_deadlist_open(&csa->ohds->ds_deadlist, dp->dp_meta_objset,
+	    csa->ohds->ds_phys->ds_deadlist_obj);
+
+	dsl_scan_ds_clone_swapped(csa->ohds, csa->cds, tx);
+}
+
+/*
+ * Swap 'clone' with its origin head datasets.  Used at the end of "zfs
+ * recv" into an existing fs to swizzle the file system to the new
+ * version, and by "zfs rollback".  Can also be used to swap two
+ * independent head datasets if neither has any snapshots.
+ */
+int
+dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head,
+    boolean_t force)
+{
+	struct cloneswaparg csa;
+	int error;
+
+	ASSERT(clone->ds_owner);
+	ASSERT(origin_head->ds_owner);
+retry:
+	/*
+	 * Need exclusive access for the swap. If we're swapping these
+	 * datasets back after an error, we already hold the locks.
+	 */
+	if (!RW_WRITE_HELD(&clone->ds_rwlock))
+		rw_enter(&clone->ds_rwlock, RW_WRITER);
+	if (!RW_WRITE_HELD(&origin_head->ds_rwlock) &&
+	    !rw_tryenter(&origin_head->ds_rwlock, RW_WRITER)) {
+		rw_exit(&clone->ds_rwlock);
+		rw_enter(&origin_head->ds_rwlock, RW_WRITER);
+		if (!rw_tryenter(&clone->ds_rwlock, RW_WRITER)) {
+			rw_exit(&origin_head->ds_rwlock);
+			goto retry;
+		}
+	}
+	csa.cds = clone;
+	csa.ohds = origin_head;
+	csa.force = force;
+	error = dsl_sync_task_do(clone->ds_dir->dd_pool,
+	    dsl_dataset_clone_swap_check,
+	    dsl_dataset_clone_swap_sync, &csa, NULL, 9);
+	return (error);
+}
+
+/*
+ * Given a pool name and a dataset object number in that pool,
+ * return the name of that dataset.
+ */
+int
+dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf)
+{
+	spa_t *spa;
+	dsl_pool_t *dp;
+	dsl_dataset_t *ds;
+	int error;
+
+	if ((error = spa_open(pname, &spa, FTAG)) != 0)
+		return (error);
+	dp = spa_get_dsl(spa);
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+	if ((error = dsl_dataset_hold_obj(dp, obj, FTAG, &ds)) == 0) {
+		dsl_dataset_name(ds, buf);
+		dsl_dataset_rele(ds, FTAG);
+	}
+	rw_exit(&dp->dp_config_rwlock);
+	spa_close(spa, FTAG);
+
+	return (error);
+}
+
+int
+dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
+    uint64_t asize, uint64_t inflight, uint64_t *used, uint64_t *ref_rsrv)
+{
+	int error = 0;
+
+	ASSERT3S(asize, >, 0);
+
+	/*
+	 * *ref_rsrv is the portion of asize that will come from any
+	 * unconsumed refreservation space.
+	 */
+	*ref_rsrv = 0;
+
+	mutex_enter(&ds->ds_lock);
+	/*
+	 * Make a space adjustment for reserved bytes.
+	 */
+	if (ds->ds_reserved > ds->ds_phys->ds_unique_bytes) {
+		ASSERT3U(*used, >=,
+		    ds->ds_reserved - ds->ds_phys->ds_unique_bytes);
+		*used -= (ds->ds_reserved - ds->ds_phys->ds_unique_bytes);
+		*ref_rsrv =
+		    asize - MIN(asize, parent_delta(ds, asize + inflight));
+	}
+
+	if (!check_quota || ds->ds_quota == 0) {
+		mutex_exit(&ds->ds_lock);
+		return (0);
+	}
+	/*
+	 * If they are requesting more space, and our current estimate
+	 * is over quota, they get to try again unless the actual
+	 * on-disk is over quota and there are no pending changes (which
+	 * may free up space for us).
+	 */
+	if (ds->ds_phys->ds_used_bytes + inflight >= ds->ds_quota) {
+		if (inflight > 0 || ds->ds_phys->ds_used_bytes < ds->ds_quota)
+			error = ERESTART;
+		else
+			error = EDQUOT;
+	}
+	mutex_exit(&ds->ds_lock);
+
+	return (error);
+}
+
+/* ARGSUSED */
+static int
+dsl_dataset_set_quota_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_prop_setarg_t *psa = arg2;
+	int err;
+
+	if (spa_version(ds->ds_dir->dd_pool->dp_spa) < SPA_VERSION_REFQUOTA)
+		return (ENOTSUP);
+
+	if ((err = dsl_prop_predict_sync(ds->ds_dir, psa)) != 0)
+		return (err);
+
+	if (psa->psa_effective_value == 0)
+		return (0);
+
+	if (psa->psa_effective_value < ds->ds_phys->ds_used_bytes ||
+	    psa->psa_effective_value < ds->ds_reserved)
+		return (ENOSPC);
+
+	return (0);
+}
+
+extern void dsl_prop_set_sync(void *, void *, dmu_tx_t *);
+
+void
+dsl_dataset_set_quota_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_prop_setarg_t *psa = arg2;
+	uint64_t effective_value = psa->psa_effective_value;
+
+	dsl_prop_set_sync(ds, psa, tx);
+	DSL_PROP_CHECK_PREDICTION(ds->ds_dir, psa);
+
+	if (ds->ds_quota != effective_value) {
+		dmu_buf_will_dirty(ds->ds_dbuf, tx);
+		ds->ds_quota = effective_value;
+
+		spa_history_log_internal(LOG_DS_REFQUOTA,
+		    ds->ds_dir->dd_pool->dp_spa, tx, "%lld dataset = %llu ",
+		    (longlong_t)ds->ds_quota, ds->ds_object);
+	}
+}
+
+int
+dsl_dataset_set_quota(const char *dsname, zprop_source_t source, uint64_t quota)
+{
+	dsl_dataset_t *ds;
+	dsl_prop_setarg_t psa;
+	int err;
+
+	dsl_prop_setarg_init_uint64(&psa, "refquota", source, &quota);
+
+	err = dsl_dataset_hold(dsname, FTAG, &ds);
+	if (err)
+		return (err);
+
+	/*
+	 * If someone removes a file, then tries to set the quota, we
+	 * want to make sure the file freeing takes effect.
+	 */
+	txg_wait_open(ds->ds_dir->dd_pool, 0);
+
+	err = dsl_sync_task_do(ds->ds_dir->dd_pool,
+	    dsl_dataset_set_quota_check, dsl_dataset_set_quota_sync,
+	    ds, &psa, 0);
+
+	dsl_dataset_rele(ds, FTAG);
+	return (err);
+}
+
+static int
+dsl_dataset_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_prop_setarg_t *psa = arg2;
+	uint64_t effective_value;
+	uint64_t unique;
+	int err;
+
+	if (spa_version(ds->ds_dir->dd_pool->dp_spa) <
+	    SPA_VERSION_REFRESERVATION)
+		return (ENOTSUP);
+
+	if (dsl_dataset_is_snapshot(ds))
+		return (EINVAL);
+
+	if ((err = dsl_prop_predict_sync(ds->ds_dir, psa)) != 0)
+		return (err);
+
+	effective_value = psa->psa_effective_value;
+
+	/*
+	 * If we are doing the preliminary check in open context, the
+	 * space estimates may be inaccurate.
+	 */
+	if (!dmu_tx_is_syncing(tx))
+		return (0);
+
+	mutex_enter(&ds->ds_lock);
+	if (!DS_UNIQUE_IS_ACCURATE(ds))
+		dsl_dataset_recalc_head_uniq(ds);
+	unique = ds->ds_phys->ds_unique_bytes;
+	mutex_exit(&ds->ds_lock);
+
+	if (MAX(unique, effective_value) > MAX(unique, ds->ds_reserved)) {
+		uint64_t delta = MAX(unique, effective_value) -
+		    MAX(unique, ds->ds_reserved);
+
+		if (delta > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE))
+			return (ENOSPC);
+		if (ds->ds_quota > 0 &&
+		    effective_value > ds->ds_quota)
+			return (ENOSPC);
+	}
+
+	return (0);
+}
+
+static void
+dsl_dataset_set_reservation_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_prop_setarg_t *psa = arg2;
+	uint64_t effective_value = psa->psa_effective_value;
+	uint64_t unique;
+	int64_t delta;
+
+	dsl_prop_set_sync(ds, psa, tx);
+	DSL_PROP_CHECK_PREDICTION(ds->ds_dir, psa);
+
+	dmu_buf_will_dirty(ds->ds_dbuf, tx);
+
+	mutex_enter(&ds->ds_dir->dd_lock);
+	mutex_enter(&ds->ds_lock);
+	ASSERT(DS_UNIQUE_IS_ACCURATE(ds));
+	unique = ds->ds_phys->ds_unique_bytes;
+	delta = MAX(0, (int64_t)(effective_value - unique)) -
+	    MAX(0, (int64_t)(ds->ds_reserved - unique));
+	ds->ds_reserved = effective_value;
+	mutex_exit(&ds->ds_lock);
+
+	dsl_dir_diduse_space(ds->ds_dir, DD_USED_REFRSRV, delta, 0, 0, tx);
+	mutex_exit(&ds->ds_dir->dd_lock);
+
+	spa_history_log_internal(LOG_DS_REFRESERV,
+	    ds->ds_dir->dd_pool->dp_spa, tx, "%lld dataset = %llu",
+	    (longlong_t)effective_value, ds->ds_object);
+}
+
+int
+dsl_dataset_set_reservation(const char *dsname, zprop_source_t source,
+    uint64_t reservation)
+{
+	dsl_dataset_t *ds;
+	dsl_prop_setarg_t psa;
+	int err;
+
+	dsl_prop_setarg_init_uint64(&psa, "refreservation", source,
+	    &reservation);
+
+	err = dsl_dataset_hold(dsname, FTAG, &ds);
+	if (err)
+		return (err);
+
+	err = dsl_sync_task_do(ds->ds_dir->dd_pool,
+	    dsl_dataset_set_reservation_check,
+	    dsl_dataset_set_reservation_sync, ds, &psa, 0);
+
+	dsl_dataset_rele(ds, FTAG);
+	return (err);
+}
+
+typedef struct zfs_hold_cleanup_arg {
+	dsl_pool_t *dp;
+	uint64_t dsobj;
+	char htag[MAXNAMELEN];
+} zfs_hold_cleanup_arg_t;
+
+static void
+dsl_dataset_user_release_onexit(void *arg)
+{
+	zfs_hold_cleanup_arg_t *ca = arg;
+
+	(void) dsl_dataset_user_release_tmp(ca->dp, ca->dsobj, ca->htag,
+	    B_TRUE);
+	kmem_free(ca, sizeof (zfs_hold_cleanup_arg_t));
+}
+
+void
+dsl_register_onexit_hold_cleanup(dsl_dataset_t *ds, const char *htag,
+    minor_t minor)
+{
+	zfs_hold_cleanup_arg_t *ca;
+
+	ca = kmem_alloc(sizeof (zfs_hold_cleanup_arg_t), KM_SLEEP);
+	ca->dp = ds->ds_dir->dd_pool;
+	ca->dsobj = ds->ds_object;
+	(void) strlcpy(ca->htag, htag, sizeof (ca->htag));
+	VERIFY3U(0, ==, zfs_onexit_add_cb(minor,
+	    dsl_dataset_user_release_onexit, ca, NULL));
+}
+
+/*
+ * If you add new checks here, you may need to add
+ * additional checks to the "temporary" case in
+ * snapshot_check() in dmu_objset.c.
+ */
+static int
+dsl_dataset_user_hold_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	struct dsl_ds_holdarg *ha = arg2;
+	char *htag = ha->htag;
+	objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
+	int error = 0;
+
+	if (spa_version(ds->ds_dir->dd_pool->dp_spa) < SPA_VERSION_USERREFS)
+		return (ENOTSUP);
+
+	if (!dsl_dataset_is_snapshot(ds))
+		return (EINVAL);
+
+	/* tags must be unique */
+	mutex_enter(&ds->ds_lock);
+	if (ds->ds_phys->ds_userrefs_obj) {
+		error = zap_lookup(mos, ds->ds_phys->ds_userrefs_obj, htag,
+		    8, 1, tx);
+		if (error == 0)
+			error = EEXIST;
+		else if (error == ENOENT)
+			error = 0;
+	}
+	mutex_exit(&ds->ds_lock);
+
+	if (error == 0 && ha->temphold &&
+	    strlen(htag) + MAX_TAG_PREFIX_LEN >= MAXNAMELEN)
+		error = E2BIG;
+
+	return (error);
+}
+
+void
+dsl_dataset_user_hold_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	struct dsl_ds_holdarg *ha = arg2;
+	char *htag = ha->htag;
+	dsl_pool_t *dp = ds->ds_dir->dd_pool;
+	objset_t *mos = dp->dp_meta_objset;
+	uint64_t now = gethrestime_sec();
+	uint64_t zapobj;
+
+	mutex_enter(&ds->ds_lock);
+	if (ds->ds_phys->ds_userrefs_obj == 0) {
+		/*
+		 * This is the first user hold for this dataset.  Create
+		 * the userrefs zap object.
+		 */
+		dmu_buf_will_dirty(ds->ds_dbuf, tx);
+		zapobj = ds->ds_phys->ds_userrefs_obj =
+		    zap_create(mos, DMU_OT_USERREFS, DMU_OT_NONE, 0, tx);
+	} else {
+		zapobj = ds->ds_phys->ds_userrefs_obj;
+	}
+	ds->ds_userrefs++;
+	mutex_exit(&ds->ds_lock);
+
+	VERIFY(0 == zap_add(mos, zapobj, htag, 8, 1, &now, tx));
+
+	if (ha->temphold) {
+		VERIFY(0 == dsl_pool_user_hold(dp, ds->ds_object,
+		    htag, &now, tx));
+	}
+
+	spa_history_log_internal(LOG_DS_USER_HOLD,
+	    dp->dp_spa, tx, "<%s> temp = %d dataset = %llu", htag,
+	    (int)ha->temphold, ds->ds_object);
+}
+
+static int
+dsl_dataset_user_hold_one(const char *dsname, void *arg)
+{
+	struct dsl_ds_holdarg *ha = arg;
+	dsl_dataset_t *ds;
+	int error;
+	char *name;
+
+	/* alloc a buffer to hold dsname@snapname plus terminating NULL */
+	name = kmem_asprintf("%s@%s", dsname, ha->snapname);
+	error = dsl_dataset_hold(name, ha->dstg, &ds);
+	strfree(name);
+	if (error == 0) {
+		ha->gotone = B_TRUE;
+		dsl_sync_task_create(ha->dstg, dsl_dataset_user_hold_check,
+		    dsl_dataset_user_hold_sync, ds, ha, 0);
+	} else if (error == ENOENT && ha->recursive) {
+		error = 0;
+	} else {
+		(void) strlcpy(ha->failed, dsname, sizeof (ha->failed));
+	}
+	return (error);
+}
+
+int
+dsl_dataset_user_hold_for_send(dsl_dataset_t *ds, char *htag,
+    boolean_t temphold)
+{
+	struct dsl_ds_holdarg *ha;
+	int error;
+
+	ha = kmem_zalloc(sizeof (struct dsl_ds_holdarg), KM_SLEEP);
+	ha->htag = htag;
+	ha->temphold = temphold;
+	error = dsl_sync_task_do(ds->ds_dir->dd_pool,
+	    dsl_dataset_user_hold_check, dsl_dataset_user_hold_sync,
+	    ds, ha, 0);
+	kmem_free(ha, sizeof (struct dsl_ds_holdarg));
+
+	return (error);
+}
+
+int
+dsl_dataset_user_hold(char *dsname, char *snapname, char *htag,
+    boolean_t recursive, boolean_t temphold, int cleanup_fd)
+{
+	struct dsl_ds_holdarg *ha;
+	dsl_sync_task_t *dst;
+	spa_t *spa;
+	int error;
+	minor_t minor = 0;
+
+	if (cleanup_fd != -1) {
+		/* Currently we only support cleanup-on-exit of tempholds. */
+		if (!temphold)
+			return (EINVAL);
+		error = zfs_onexit_fd_hold(cleanup_fd, &minor);
+		if (error)
+			return (error);
+	}
+
+	ha = kmem_zalloc(sizeof (struct dsl_ds_holdarg), KM_SLEEP);
+
+	(void) strlcpy(ha->failed, dsname, sizeof (ha->failed));
+
+	error = spa_open(dsname, &spa, FTAG);
+	if (error) {
+		kmem_free(ha, sizeof (struct dsl_ds_holdarg));
+		if (cleanup_fd != -1)
+			zfs_onexit_fd_rele(cleanup_fd);
+		return (error);
+	}
+
+	ha->dstg = dsl_sync_task_group_create(spa_get_dsl(spa));
+	ha->htag = htag;
+	ha->snapname = snapname;
+	ha->recursive = recursive;
+	ha->temphold = temphold;
+
+	if (recursive) {
+		error = dmu_objset_find(dsname, dsl_dataset_user_hold_one,
+		    ha, DS_FIND_CHILDREN);
+	} else {
+		error = dsl_dataset_user_hold_one(dsname, ha);
+	}
+	if (error == 0)
+		error = dsl_sync_task_group_wait(ha->dstg);
+
+	for (dst = list_head(&ha->dstg->dstg_tasks); dst;
+	    dst = list_next(&ha->dstg->dstg_tasks, dst)) {
+		dsl_dataset_t *ds = dst->dst_arg1;
+
+		if (dst->dst_err) {
+			dsl_dataset_name(ds, ha->failed);
+			*strchr(ha->failed, '@') = '\0';
+		} else if (error == 0 && minor != 0 && temphold) {
+			/*
+			 * If this hold is to be released upon process exit,
+			 * register that action now.
+			 */
+			dsl_register_onexit_hold_cleanup(ds, htag, minor);
+		}
+		dsl_dataset_rele(ds, ha->dstg);
+	}
+
+	if (error == 0 && recursive && !ha->gotone)
+		error = ENOENT;
+
+	if (error)
+		(void) strlcpy(dsname, ha->failed, sizeof (ha->failed));
+
+	dsl_sync_task_group_destroy(ha->dstg);
+
+	kmem_free(ha, sizeof (struct dsl_ds_holdarg));
+	spa_close(spa, FTAG);
+	if (cleanup_fd != -1)
+		zfs_onexit_fd_rele(cleanup_fd);
+	return (error);
+}
+
+struct dsl_ds_releasearg {
+	dsl_dataset_t *ds;
+	const char *htag;
+	boolean_t own;		/* do we own or just hold ds? */
+};
+
+static int
+dsl_dataset_release_might_destroy(dsl_dataset_t *ds, const char *htag,
+    boolean_t *might_destroy)
+{
+	objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
+	uint64_t zapobj;
+	uint64_t tmp;
+	int error;
+
+	*might_destroy = B_FALSE;
+
+	mutex_enter(&ds->ds_lock);
+	zapobj = ds->ds_phys->ds_userrefs_obj;
+	if (zapobj == 0) {
+		/* The tag can't possibly exist */
+		mutex_exit(&ds->ds_lock);
+		return (ESRCH);
+	}
+
+	/* Make sure the tag exists */
+	error = zap_lookup(mos, zapobj, htag, 8, 1, &tmp);
+	if (error) {
+		mutex_exit(&ds->ds_lock);
+		if (error == ENOENT)
+			error = ESRCH;
+		return (error);
+	}
+
+	if (ds->ds_userrefs == 1 && ds->ds_phys->ds_num_children == 1 &&
+	    DS_IS_DEFER_DESTROY(ds))
+		*might_destroy = B_TRUE;
+
+	mutex_exit(&ds->ds_lock);
+	return (0);
+}
+
+static int
+dsl_dataset_user_release_check(void *arg1, void *tag, dmu_tx_t *tx)
+{
+	struct dsl_ds_releasearg *ra = arg1;
+	dsl_dataset_t *ds = ra->ds;
+	boolean_t might_destroy;
+	int error;
+
+	if (spa_version(ds->ds_dir->dd_pool->dp_spa) < SPA_VERSION_USERREFS)
+		return (ENOTSUP);
+
+	error = dsl_dataset_release_might_destroy(ds, ra->htag, &might_destroy);
+	if (error)
+		return (error);
+
+	if (might_destroy) {
+		struct dsl_ds_destroyarg dsda = {0};
+
+		if (dmu_tx_is_syncing(tx)) {
+			/*
+			 * If we're not prepared to remove the snapshot,
+			 * we can't allow the release to happen right now.
+			 */
+			if (!ra->own)
+				return (EBUSY);
+		}
+		dsda.ds = ds;
+		dsda.releasing = B_TRUE;
+		return (dsl_dataset_destroy_check(&dsda, tag, tx));
+	}
+
+	return (0);
+}
+
+static void
+dsl_dataset_user_release_sync(void *arg1, void *tag, dmu_tx_t *tx)
+{
+	struct dsl_ds_releasearg *ra = arg1;
+	dsl_dataset_t *ds = ra->ds;
+	dsl_pool_t *dp = ds->ds_dir->dd_pool;
+	objset_t *mos = dp->dp_meta_objset;
+	uint64_t zapobj;
+	uint64_t dsobj = ds->ds_object;
+	uint64_t refs;
+	int error;
+
+	mutex_enter(&ds->ds_lock);
+	ds->ds_userrefs--;
+	refs = ds->ds_userrefs;
+	mutex_exit(&ds->ds_lock);
+	error = dsl_pool_user_release(dp, ds->ds_object, ra->htag, tx);
+	VERIFY(error == 0 || error == ENOENT);
+	zapobj = ds->ds_phys->ds_userrefs_obj;
+	VERIFY(0 == zap_remove(mos, zapobj, ra->htag, tx));
+	if (ds->ds_userrefs == 0 && ds->ds_phys->ds_num_children == 1 &&
+	    DS_IS_DEFER_DESTROY(ds)) {
+		struct dsl_ds_destroyarg dsda = {0};
+
+		ASSERT(ra->own);
+		dsda.ds = ds;
+		dsda.releasing = B_TRUE;
+		/* We already did the destroy_check */
+		dsl_dataset_destroy_sync(&dsda, tag, tx);
+	}
+
+	spa_history_log_internal(LOG_DS_USER_RELEASE,
+	    dp->dp_spa, tx, "<%s> %lld dataset = %llu",
+	    ra->htag, (longlong_t)refs, dsobj);
+}
+
+static int
+dsl_dataset_user_release_one(const char *dsname, void *arg)
+{
+	struct dsl_ds_holdarg *ha = arg;
+	struct dsl_ds_releasearg *ra;
+	dsl_dataset_t *ds;
+	int error;
+	void *dtag = ha->dstg;
+	char *name;
+	boolean_t own = B_FALSE;
+	boolean_t might_destroy;
+
+	/* alloc a buffer to hold dsname@snapname, plus the terminating NULL */
+	name = kmem_asprintf("%s@%s", dsname, ha->snapname);
+	error = dsl_dataset_hold(name, dtag, &ds);
+	strfree(name);
+	if (error == ENOENT && ha->recursive)
+		return (0);
+	(void) strlcpy(ha->failed, dsname, sizeof (ha->failed));
+	if (error)
+		return (error);
+
+	ha->gotone = B_TRUE;
+
+	ASSERT(dsl_dataset_is_snapshot(ds));
+
+	error = dsl_dataset_release_might_destroy(ds, ha->htag, &might_destroy);
+	if (error) {
+		dsl_dataset_rele(ds, dtag);
+		return (error);
+	}
+
+	if (might_destroy) {
+#ifdef _KERNEL
+		name = kmem_asprintf("%s@%s", dsname, ha->snapname);
+		error = zfs_unmount_snap(name, NULL);
+		strfree(name);
+		if (error) {
+			dsl_dataset_rele(ds, dtag);
+			return (error);
+		}
+#endif
+		if (!dsl_dataset_tryown(ds, B_TRUE, dtag)) {
+			dsl_dataset_rele(ds, dtag);
+			return (EBUSY);
+		} else {
+			own = B_TRUE;
+			dsl_dataset_make_exclusive(ds, dtag);
+		}
+	}
+
+	ra = kmem_alloc(sizeof (struct dsl_ds_releasearg), KM_SLEEP);
+	ra->ds = ds;
+	ra->htag = ha->htag;
+	ra->own = own;
+	dsl_sync_task_create(ha->dstg, dsl_dataset_user_release_check,
+	    dsl_dataset_user_release_sync, ra, dtag, 0);
+
+	return (0);
+}
+
+int
+dsl_dataset_user_release(char *dsname, char *snapname, char *htag,
+    boolean_t recursive)
+{
+	struct dsl_ds_holdarg *ha;
+	dsl_sync_task_t *dst;
+	spa_t *spa;
+	int error;
+
+top:
+	ha = kmem_zalloc(sizeof (struct dsl_ds_holdarg), KM_SLEEP);
+
+	(void) strlcpy(ha->failed, dsname, sizeof (ha->failed));
+
+	error = spa_open(dsname, &spa, FTAG);
+	if (error) {
+		kmem_free(ha, sizeof (struct dsl_ds_holdarg));
+		return (error);
+	}
+
+	ha->dstg = dsl_sync_task_group_create(spa_get_dsl(spa));
+	ha->htag = htag;
+	ha->snapname = snapname;
+	ha->recursive = recursive;
+	if (recursive) {
+		error = dmu_objset_find(dsname, dsl_dataset_user_release_one,
+		    ha, DS_FIND_CHILDREN);
+	} else {
+		error = dsl_dataset_user_release_one(dsname, ha);
+	}
+	if (error == 0)
+		error = dsl_sync_task_group_wait(ha->dstg);
+
+	for (dst = list_head(&ha->dstg->dstg_tasks); dst;
+	    dst = list_next(&ha->dstg->dstg_tasks, dst)) {
+		struct dsl_ds_releasearg *ra = dst->dst_arg1;
+		dsl_dataset_t *ds = ra->ds;
+
+		if (dst->dst_err)
+			dsl_dataset_name(ds, ha->failed);
+
+		if (ra->own)
+			dsl_dataset_disown(ds, ha->dstg);
+		else
+			dsl_dataset_rele(ds, ha->dstg);
+
+		kmem_free(ra, sizeof (struct dsl_ds_releasearg));
+	}
+
+	if (error == 0 && recursive && !ha->gotone)
+		error = ENOENT;
+
+	if (error && error != EBUSY)
+		(void) strlcpy(dsname, ha->failed, sizeof (ha->failed));
+
+	dsl_sync_task_group_destroy(ha->dstg);
+	kmem_free(ha, sizeof (struct dsl_ds_holdarg));
+	spa_close(spa, FTAG);
+
+	/*
+	 * We can get EBUSY if we were racing with deferred destroy and
+	 * dsl_dataset_user_release_check() hadn't done the necessary
+	 * open context setup.  We can also get EBUSY if we're racing
+	 * with destroy and that thread is the ds_owner.  Either way
+	 * the busy condition should be transient, and we should retry
+	 * the release operation.
+	 */
+	if (error == EBUSY)
+		goto top;
+
+	return (error);
+}
+
+/*
+ * Called at spa_load time (with retry == B_FALSE) to release a stale
+ * temporary user hold. Also called by the onexit code (with retry == B_TRUE).
+ */
+int
+dsl_dataset_user_release_tmp(dsl_pool_t *dp, uint64_t dsobj, char *htag,
+    boolean_t retry)
+{
+	dsl_dataset_t *ds;
+	char *snap;
+	char *name;
+	int namelen;
+	int error;
+
+	do {
+		rw_enter(&dp->dp_config_rwlock, RW_READER);
+		error = dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds);
+		rw_exit(&dp->dp_config_rwlock);
+		if (error)
+			return (error);
+		namelen = dsl_dataset_namelen(ds)+1;
+		name = kmem_alloc(namelen, KM_SLEEP);
+		dsl_dataset_name(ds, name);
+		dsl_dataset_rele(ds, FTAG);
+
+		snap = strchr(name, '@');
+		*snap = '\0';
+		++snap;
+		error = dsl_dataset_user_release(name, snap, htag, B_FALSE);
+		kmem_free(name, namelen);
+
+		/*
+		 * The object can't have been destroyed because we have a hold,
+		 * but it might have been renamed, resulting in ENOENT.  Retry
+		 * if we've been requested to do so.
+		 *
+		 * It would be nice if we could use the dsobj all the way
+		 * through and avoid ENOENT entirely.  But we might need to
+		 * unmount the snapshot, and there's currently no way to lookup
+		 * a vfsp using a ZFS object id.
+		 */
+	} while ((error == ENOENT) && retry);
+
+	return (error);
+}
+
+int
+dsl_dataset_get_holds(const char *dsname, nvlist_t **nvp)
+{
+	dsl_dataset_t *ds;
+	int err;
+
+	err = dsl_dataset_hold(dsname, FTAG, &ds);
+	if (err)
+		return (err);
+
+	VERIFY(0 == nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP));
+	if (ds->ds_phys->ds_userrefs_obj != 0) {
+		zap_attribute_t *za;
+		zap_cursor_t zc;
+
+		za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
+		for (zap_cursor_init(&zc, ds->ds_dir->dd_pool->dp_meta_objset,
+		    ds->ds_phys->ds_userrefs_obj);
+		    zap_cursor_retrieve(&zc, za) == 0;
+		    zap_cursor_advance(&zc)) {
+			VERIFY(0 == nvlist_add_uint64(*nvp, za->za_name,
+			    za->za_first_integer));
+		}
+		zap_cursor_fini(&zc);
+		kmem_free(za, sizeof (zap_attribute_t));
+	}
+	dsl_dataset_rele(ds, FTAG);
+	return (0);
+}
+
+/*
+ * Note, this fuction is used as the callback for dmu_objset_find().  We
+ * always return 0 so that we will continue to find and process
+ * inconsistent datasets, even if we encounter an error trying to
+ * process one of them.
+ */
+/* ARGSUSED */
+int
+dsl_destroy_inconsistent(const char *dsname, void *arg)
+{
+	dsl_dataset_t *ds;
+
+	if (dsl_dataset_own(dsname, B_TRUE, FTAG, &ds) == 0) {
+		if (DS_IS_INCONSISTENT(ds))
+			(void) dsl_dataset_destroy(ds, FTAG, B_FALSE);
+		else
+			dsl_dataset_disown(ds, FTAG);
+	}
+	return (0);
+}
diff --git a/uts/common/fs/zfs/dsl_deadlist.c b/uts/common/fs/zfs/dsl_deadlist.c
new file mode 100644
index 000000000000..064f8aceb8ee
--- /dev/null
+++ b/uts/common/fs/zfs/dsl_deadlist.c
@@ -0,0 +1,474 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/dsl_dataset.h>
+#include <sys/dmu.h>
+#include <sys/refcount.h>
+#include <sys/zap.h>
+#include <sys/zfs_context.h>
+#include <sys/dsl_pool.h>
+
+static int
+dsl_deadlist_compare(const void *arg1, const void *arg2)
+{
+	const dsl_deadlist_entry_t *dle1 = arg1;
+	const dsl_deadlist_entry_t *dle2 = arg2;
+
+	if (dle1->dle_mintxg < dle2->dle_mintxg)
+		return (-1);
+	else if (dle1->dle_mintxg > dle2->dle_mintxg)
+		return (+1);
+	else
+		return (0);
+}
+
+static void
+dsl_deadlist_load_tree(dsl_deadlist_t *dl)
+{
+	zap_cursor_t zc;
+	zap_attribute_t za;
+
+	ASSERT(!dl->dl_oldfmt);
+	if (dl->dl_havetree)
+		return;
+
+	avl_create(&dl->dl_tree, dsl_deadlist_compare,
+	    sizeof (dsl_deadlist_entry_t),
+	    offsetof(dsl_deadlist_entry_t, dle_node));
+	for (zap_cursor_init(&zc, dl->dl_os, dl->dl_object);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    zap_cursor_advance(&zc)) {
+		dsl_deadlist_entry_t *dle = kmem_alloc(sizeof (*dle), KM_SLEEP);
+		dle->dle_mintxg = strtonum(za.za_name, NULL);
+		VERIFY3U(0, ==, bpobj_open(&dle->dle_bpobj, dl->dl_os,
+		    za.za_first_integer));
+		avl_add(&dl->dl_tree, dle);
+	}
+	zap_cursor_fini(&zc);
+	dl->dl_havetree = B_TRUE;
+}
+
+void
+dsl_deadlist_open(dsl_deadlist_t *dl, objset_t *os, uint64_t object)
+{
+	dmu_object_info_t doi;
+
+	mutex_init(&dl->dl_lock, NULL, MUTEX_DEFAULT, NULL);
+	dl->dl_os = os;
+	dl->dl_object = object;
+	VERIFY3U(0, ==, dmu_bonus_hold(os, object, dl, &dl->dl_dbuf));
+	dmu_object_info_from_db(dl->dl_dbuf, &doi);
+	if (doi.doi_type == DMU_OT_BPOBJ) {
+		dmu_buf_rele(dl->dl_dbuf, dl);
+		dl->dl_dbuf = NULL;
+		dl->dl_oldfmt = B_TRUE;
+		VERIFY3U(0, ==, bpobj_open(&dl->dl_bpobj, os, object));
+		return;
+	}
+
+	dl->dl_oldfmt = B_FALSE;
+	dl->dl_phys = dl->dl_dbuf->db_data;
+	dl->dl_havetree = B_FALSE;
+}
+
+void
+dsl_deadlist_close(dsl_deadlist_t *dl)
+{
+	void *cookie = NULL;
+	dsl_deadlist_entry_t *dle;
+
+	if (dl->dl_oldfmt) {
+		dl->dl_oldfmt = B_FALSE;
+		bpobj_close(&dl->dl_bpobj);
+		return;
+	}
+
+	if (dl->dl_havetree) {
+		while ((dle = avl_destroy_nodes(&dl->dl_tree, &cookie))
+		    != NULL) {
+			bpobj_close(&dle->dle_bpobj);
+			kmem_free(dle, sizeof (*dle));
+		}
+		avl_destroy(&dl->dl_tree);
+	}
+	dmu_buf_rele(dl->dl_dbuf, dl);
+	mutex_destroy(&dl->dl_lock);
+	dl->dl_dbuf = NULL;
+	dl->dl_phys = NULL;
+}
+
+uint64_t
+dsl_deadlist_alloc(objset_t *os, dmu_tx_t *tx)
+{
+	if (spa_version(dmu_objset_spa(os)) < SPA_VERSION_DEADLISTS)
+		return (bpobj_alloc(os, SPA_MAXBLOCKSIZE, tx));
+	return (zap_create(os, DMU_OT_DEADLIST, DMU_OT_DEADLIST_HDR,
+	    sizeof (dsl_deadlist_phys_t), tx));
+}
+
+void
+dsl_deadlist_free(objset_t *os, uint64_t dlobj, dmu_tx_t *tx)
+{
+	dmu_object_info_t doi;
+	zap_cursor_t zc;
+	zap_attribute_t za;
+
+	VERIFY3U(0, ==, dmu_object_info(os, dlobj, &doi));
+	if (doi.doi_type == DMU_OT_BPOBJ) {
+		bpobj_free(os, dlobj, tx);
+		return;
+	}
+
+	for (zap_cursor_init(&zc, os, dlobj);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    zap_cursor_advance(&zc))
+		bpobj_free(os, za.za_first_integer, tx);
+	zap_cursor_fini(&zc);
+	VERIFY3U(0, ==, dmu_object_free(os, dlobj, tx));
+}
+
+void
+dsl_deadlist_insert(dsl_deadlist_t *dl, const blkptr_t *bp, dmu_tx_t *tx)
+{
+	dsl_deadlist_entry_t dle_tofind;
+	dsl_deadlist_entry_t *dle;
+	avl_index_t where;
+
+	if (dl->dl_oldfmt) {
+		bpobj_enqueue(&dl->dl_bpobj, bp, tx);
+		return;
+	}
+
+	dsl_deadlist_load_tree(dl);
+
+	dmu_buf_will_dirty(dl->dl_dbuf, tx);
+	mutex_enter(&dl->dl_lock);
+	dl->dl_phys->dl_used +=
+	    bp_get_dsize_sync(dmu_objset_spa(dl->dl_os), bp);
+	dl->dl_phys->dl_comp += BP_GET_PSIZE(bp);
+	dl->dl_phys->dl_uncomp += BP_GET_UCSIZE(bp);
+	mutex_exit(&dl->dl_lock);
+
+	dle_tofind.dle_mintxg = bp->blk_birth;
+	dle = avl_find(&dl->dl_tree, &dle_tofind, &where);
+	if (dle == NULL)
+		dle = avl_nearest(&dl->dl_tree, where, AVL_BEFORE);
+	else
+		dle = AVL_PREV(&dl->dl_tree, dle);
+	bpobj_enqueue(&dle->dle_bpobj, bp, tx);
+}
+
+/*
+ * Insert new key in deadlist, which must be > all current entries.
+ * mintxg is not inclusive.
+ */
+void
+dsl_deadlist_add_key(dsl_deadlist_t *dl, uint64_t mintxg, dmu_tx_t *tx)
+{
+	uint64_t obj;
+	dsl_deadlist_entry_t *dle;
+
+	if (dl->dl_oldfmt)
+		return;
+
+	dsl_deadlist_load_tree(dl);
+
+	dle = kmem_alloc(sizeof (*dle), KM_SLEEP);
+	dle->dle_mintxg = mintxg;
+	obj = bpobj_alloc(dl->dl_os, SPA_MAXBLOCKSIZE, tx);
+	VERIFY3U(0, ==, bpobj_open(&dle->dle_bpobj, dl->dl_os, obj));
+	avl_add(&dl->dl_tree, dle);
+
+	VERIFY3U(0, ==, zap_add_int_key(dl->dl_os, dl->dl_object,
+	    mintxg, obj, tx));
+}
+
+/*
+ * Remove this key, merging its entries into the previous key.
+ */
+void
+dsl_deadlist_remove_key(dsl_deadlist_t *dl, uint64_t mintxg, dmu_tx_t *tx)
+{
+	dsl_deadlist_entry_t dle_tofind;
+	dsl_deadlist_entry_t *dle, *dle_prev;
+
+	if (dl->dl_oldfmt)
+		return;
+
+	dsl_deadlist_load_tree(dl);
+
+	dle_tofind.dle_mintxg = mintxg;
+	dle = avl_find(&dl->dl_tree, &dle_tofind, NULL);
+	dle_prev = AVL_PREV(&dl->dl_tree, dle);
+
+	bpobj_enqueue_subobj(&dle_prev->dle_bpobj,
+	    dle->dle_bpobj.bpo_object, tx);
+
+	avl_remove(&dl->dl_tree, dle);
+	bpobj_close(&dle->dle_bpobj);
+	kmem_free(dle, sizeof (*dle));
+
+	VERIFY3U(0, ==, zap_remove_int(dl->dl_os, dl->dl_object, mintxg, tx));
+}
+
+/*
+ * Walk ds's snapshots to regenerate generate ZAP & AVL.
+ */
+static void
+dsl_deadlist_regenerate(objset_t *os, uint64_t dlobj,
+    uint64_t mrs_obj, dmu_tx_t *tx)
+{
+	dsl_deadlist_t dl;
+	dsl_pool_t *dp = dmu_objset_pool(os);
+
+	dsl_deadlist_open(&dl, os, dlobj);
+	if (dl.dl_oldfmt) {
+		dsl_deadlist_close(&dl);
+		return;
+	}
+
+	while (mrs_obj != 0) {
+		dsl_dataset_t *ds;
+		VERIFY3U(0, ==, dsl_dataset_hold_obj(dp, mrs_obj, FTAG, &ds));
+		dsl_deadlist_add_key(&dl, ds->ds_phys->ds_prev_snap_txg, tx);
+		mrs_obj = ds->ds_phys->ds_prev_snap_obj;
+		dsl_dataset_rele(ds, FTAG);
+	}
+	dsl_deadlist_close(&dl);
+}
+
+uint64_t
+dsl_deadlist_clone(dsl_deadlist_t *dl, uint64_t maxtxg,
+    uint64_t mrs_obj, dmu_tx_t *tx)
+{
+	dsl_deadlist_entry_t *dle;
+	uint64_t newobj;
+
+	newobj = dsl_deadlist_alloc(dl->dl_os, tx);
+
+	if (dl->dl_oldfmt) {
+		dsl_deadlist_regenerate(dl->dl_os, newobj, mrs_obj, tx);
+		return (newobj);
+	}
+
+	dsl_deadlist_load_tree(dl);
+
+	for (dle = avl_first(&dl->dl_tree); dle;
+	    dle = AVL_NEXT(&dl->dl_tree, dle)) {
+		uint64_t obj;
+
+		if (dle->dle_mintxg >= maxtxg)
+			break;
+
+		obj = bpobj_alloc(dl->dl_os, SPA_MAXBLOCKSIZE, tx);
+		VERIFY3U(0, ==, zap_add_int_key(dl->dl_os, newobj,
+		    dle->dle_mintxg, obj, tx));
+	}
+	return (newobj);
+}
+
+void
+dsl_deadlist_space(dsl_deadlist_t *dl,
+    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp)
+{
+	if (dl->dl_oldfmt) {
+		VERIFY3U(0, ==, bpobj_space(&dl->dl_bpobj,
+		    usedp, compp, uncompp));
+		return;
+	}
+
+	mutex_enter(&dl->dl_lock);
+	*usedp = dl->dl_phys->dl_used;
+	*compp = dl->dl_phys->dl_comp;
+	*uncompp = dl->dl_phys->dl_uncomp;
+	mutex_exit(&dl->dl_lock);
+}
+
+/*
+ * return space used in the range (mintxg, maxtxg].
+ * Includes maxtxg, does not include mintxg.
+ * mintxg and maxtxg must both be keys in the deadlist (unless maxtxg is
+ * UINT64_MAX).
+ */
+void
+dsl_deadlist_space_range(dsl_deadlist_t *dl, uint64_t mintxg, uint64_t maxtxg,
+    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp)
+{
+	dsl_deadlist_entry_t dle_tofind;
+	dsl_deadlist_entry_t *dle;
+	avl_index_t where;
+
+	if (dl->dl_oldfmt) {
+		VERIFY3U(0, ==, bpobj_space_range(&dl->dl_bpobj,
+		    mintxg, maxtxg, usedp, compp, uncompp));
+		return;
+	}
+
+	dsl_deadlist_load_tree(dl);
+	*usedp = *compp = *uncompp = 0;
+
+	dle_tofind.dle_mintxg = mintxg;
+	dle = avl_find(&dl->dl_tree, &dle_tofind, &where);
+	/*
+	 * If we don't find this mintxg, there shouldn't be anything
+	 * after it either.
+	 */
+	ASSERT(dle != NULL ||
+	    avl_nearest(&dl->dl_tree, where, AVL_AFTER) == NULL);
+	for (; dle && dle->dle_mintxg < maxtxg;
+	    dle = AVL_NEXT(&dl->dl_tree, dle)) {
+		uint64_t used, comp, uncomp;
+
+		VERIFY3U(0, ==, bpobj_space(&dle->dle_bpobj,
+		    &used, &comp, &uncomp));
+
+		*usedp += used;
+		*compp += comp;
+		*uncompp += uncomp;
+	}
+}
+
+static void
+dsl_deadlist_insert_bpobj(dsl_deadlist_t *dl, uint64_t obj, uint64_t birth,
+    dmu_tx_t *tx)
+{
+	dsl_deadlist_entry_t dle_tofind;
+	dsl_deadlist_entry_t *dle;
+	avl_index_t where;
+	uint64_t used, comp, uncomp;
+	bpobj_t bpo;
+
+	VERIFY3U(0, ==, bpobj_open(&bpo, dl->dl_os, obj));
+	VERIFY3U(0, ==, bpobj_space(&bpo, &used, &comp, &uncomp));
+	bpobj_close(&bpo);
+
+	dsl_deadlist_load_tree(dl);
+
+	dmu_buf_will_dirty(dl->dl_dbuf, tx);
+	mutex_enter(&dl->dl_lock);
+	dl->dl_phys->dl_used += used;
+	dl->dl_phys->dl_comp += comp;
+	dl->dl_phys->dl_uncomp += uncomp;
+	mutex_exit(&dl->dl_lock);
+
+	dle_tofind.dle_mintxg = birth;
+	dle = avl_find(&dl->dl_tree, &dle_tofind, &where);
+	if (dle == NULL)
+		dle = avl_nearest(&dl->dl_tree, where, AVL_BEFORE);
+	bpobj_enqueue_subobj(&dle->dle_bpobj, obj, tx);
+}
+
+static int
+dsl_deadlist_insert_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
+{
+	dsl_deadlist_t *dl = arg;
+	dsl_deadlist_insert(dl, bp, tx);
+	return (0);
+}
+
+/*
+ * Merge the deadlist pointed to by 'obj' into dl.  obj will be left as
+ * an empty deadlist.
+ */
+void
+dsl_deadlist_merge(dsl_deadlist_t *dl, uint64_t obj, dmu_tx_t *tx)
+{
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	dmu_buf_t *bonus;
+	dsl_deadlist_phys_t *dlp;
+	dmu_object_info_t doi;
+
+	VERIFY3U(0, ==, dmu_object_info(dl->dl_os, obj, &doi));
+	if (doi.doi_type == DMU_OT_BPOBJ) {
+		bpobj_t bpo;
+		VERIFY3U(0, ==, bpobj_open(&bpo, dl->dl_os, obj));
+		VERIFY3U(0, ==, bpobj_iterate(&bpo,
+		    dsl_deadlist_insert_cb, dl, tx));
+		bpobj_close(&bpo);
+		return;
+	}
+
+	for (zap_cursor_init(&zc, dl->dl_os, obj);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    zap_cursor_advance(&zc)) {
+		uint64_t mintxg = strtonum(za.za_name, NULL);
+		dsl_deadlist_insert_bpobj(dl, za.za_first_integer, mintxg, tx);
+		VERIFY3U(0, ==, zap_remove_int(dl->dl_os, obj, mintxg, tx));
+	}
+	zap_cursor_fini(&zc);
+
+	VERIFY3U(0, ==, dmu_bonus_hold(dl->dl_os, obj, FTAG, &bonus));
+	dlp = bonus->db_data;
+	dmu_buf_will_dirty(bonus, tx);
+	bzero(dlp, sizeof (*dlp));
+	dmu_buf_rele(bonus, FTAG);
+}
+
+/*
+ * Remove entries on dl that are >= mintxg, and put them on the bpobj.
+ */
+void
+dsl_deadlist_move_bpobj(dsl_deadlist_t *dl, bpobj_t *bpo, uint64_t mintxg,
+    dmu_tx_t *tx)
+{
+	dsl_deadlist_entry_t dle_tofind;
+	dsl_deadlist_entry_t *dle;
+	avl_index_t where;
+
+	ASSERT(!dl->dl_oldfmt);
+	dmu_buf_will_dirty(dl->dl_dbuf, tx);
+	dsl_deadlist_load_tree(dl);
+
+	dle_tofind.dle_mintxg = mintxg;
+	dle = avl_find(&dl->dl_tree, &dle_tofind, &where);
+	if (dle == NULL)
+		dle = avl_nearest(&dl->dl_tree, where, AVL_AFTER);
+	while (dle) {
+		uint64_t used, comp, uncomp;
+		dsl_deadlist_entry_t *dle_next;
+
+		bpobj_enqueue_subobj(bpo, dle->dle_bpobj.bpo_object, tx);
+
+		VERIFY3U(0, ==, bpobj_space(&dle->dle_bpobj,
+		    &used, &comp, &uncomp));
+		mutex_enter(&dl->dl_lock);
+		ASSERT3U(dl->dl_phys->dl_used, >=, used);
+		ASSERT3U(dl->dl_phys->dl_comp, >=, comp);
+		ASSERT3U(dl->dl_phys->dl_uncomp, >=, uncomp);
+		dl->dl_phys->dl_used -= used;
+		dl->dl_phys->dl_comp -= comp;
+		dl->dl_phys->dl_uncomp -= uncomp;
+		mutex_exit(&dl->dl_lock);
+
+		VERIFY3U(0, ==, zap_remove_int(dl->dl_os, dl->dl_object,
+		    dle->dle_mintxg, tx));
+
+		dle_next = AVL_NEXT(&dl->dl_tree, dle);
+		avl_remove(&dl->dl_tree, dle);
+		bpobj_close(&dle->dle_bpobj);
+		kmem_free(dle, sizeof (*dle));
+		dle = dle_next;
+	}
+}
diff --git a/uts/common/fs/zfs/dsl_deleg.c b/uts/common/fs/zfs/dsl_deleg.c
new file mode 100644
index 000000000000..529fb052fa75
--- /dev/null
+++ b/uts/common/fs/zfs/dsl_deleg.c
@@ -0,0 +1,746 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * DSL permissions are stored in a two level zap attribute
+ * mechanism.   The first level identifies the "class" of
+ * entry.  The class is identified by the first 2 letters of
+ * the attribute.  The second letter "l" or "d" identifies whether
+ * it is a local or descendent permission.  The first letter
+ * identifies the type of entry.
+ *
+ * ul$<id>    identifies permissions granted locally for this userid.
+ * ud$<id>    identifies permissions granted on descendent datasets for
+ *            this userid.
+ * Ul$<id>    identifies permission sets granted locally for this userid.
+ * Ud$<id>    identifies permission sets granted on descendent datasets for
+ *            this userid.
+ * gl$<id>    identifies permissions granted locally for this groupid.
+ * gd$<id>    identifies permissions granted on descendent datasets for
+ *            this groupid.
+ * Gl$<id>    identifies permission sets granted locally for this groupid.
+ * Gd$<id>    identifies permission sets granted on descendent datasets for
+ *            this groupid.
+ * el$        identifies permissions granted locally for everyone.
+ * ed$        identifies permissions granted on descendent datasets
+ *            for everyone.
+ * El$        identifies permission sets granted locally for everyone.
+ * Ed$        identifies permission sets granted to descendent datasets for
+ *            everyone.
+ * c-$        identifies permission to create at dataset creation time.
+ * C-$        identifies permission sets to grant locally at dataset creation
+ *            time.
+ * s-$@<name> permissions defined in specified set @<name>
+ * S-$@<name> Sets defined in named set @<name>
+ *
+ * Each of the above entities points to another zap attribute that contains one
+ * attribute for each allowed permission, such as create, destroy,...
+ * All of the "upper" case class types will specify permission set names
+ * rather than permissions.
+ *
+ * Basically it looks something like this:
+ * ul$12 -> ZAP OBJ -> permissions...
+ *
+ * The ZAP OBJ is referred to as the jump object.
+ */
+
+#include <sys/dmu.h>
+#include <sys/dmu_objset.h>
+#include <sys/dmu_tx.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_synctask.h>
+#include <sys/dsl_deleg.h>
+#include <sys/spa.h>
+#include <sys/zap.h>
+#include <sys/fs/zfs.h>
+#include <sys/cred.h>
+#include <sys/sunddi.h>
+
+#include "zfs_deleg.h"
+
+/*
+ * Validate that user is allowed to delegate specified permissions.
+ *
+ * In order to delegate "create" you must have "create"
+ * and "allow".
+ */
+int
+dsl_deleg_can_allow(char *ddname, nvlist_t *nvp, cred_t *cr)
+{
+	nvpair_t *whopair = NULL;
+	int error;
+
+	if ((error = dsl_deleg_access(ddname, ZFS_DELEG_PERM_ALLOW, cr)) != 0)
+		return (error);
+
+	while (whopair = nvlist_next_nvpair(nvp, whopair)) {
+		nvlist_t *perms;
+		nvpair_t *permpair = NULL;
+
+		VERIFY(nvpair_value_nvlist(whopair, &perms) == 0);
+
+		while (permpair = nvlist_next_nvpair(perms, permpair)) {
+			const char *perm = nvpair_name(permpair);
+
+			if (strcmp(perm, ZFS_DELEG_PERM_ALLOW) == 0)
+				return (EPERM);
+
+			if ((error = dsl_deleg_access(ddname, perm, cr)) != 0)
+				return (error);
+		}
+	}
+	return (0);
+}
+
+/*
+ * Validate that user is allowed to unallow specified permissions.  They
+ * must have the 'allow' permission, and even then can only unallow
+ * perms for their uid.
+ */
+int
+dsl_deleg_can_unallow(char *ddname, nvlist_t *nvp, cred_t *cr)
+{
+	nvpair_t *whopair = NULL;
+	int error;
+	char idstr[32];
+
+	if ((error = dsl_deleg_access(ddname, ZFS_DELEG_PERM_ALLOW, cr)) != 0)
+		return (error);
+
+	(void) snprintf(idstr, sizeof (idstr), "%lld",
+	    (longlong_t)crgetuid(cr));
+
+	while (whopair = nvlist_next_nvpair(nvp, whopair)) {
+		zfs_deleg_who_type_t type = nvpair_name(whopair)[0];
+
+		if (type != ZFS_DELEG_USER &&
+		    type != ZFS_DELEG_USER_SETS)
+			return (EPERM);
+
+		if (strcmp(idstr, &nvpair_name(whopair)[3]) != 0)
+			return (EPERM);
+	}
+	return (0);
+}
+
+static void
+dsl_deleg_set_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dir_t *dd = arg1;
+	nvlist_t *nvp = arg2;
+	objset_t *mos = dd->dd_pool->dp_meta_objset;
+	nvpair_t *whopair = NULL;
+	uint64_t zapobj = dd->dd_phys->dd_deleg_zapobj;
+
+	if (zapobj == 0) {
+		dmu_buf_will_dirty(dd->dd_dbuf, tx);
+		zapobj = dd->dd_phys->dd_deleg_zapobj = zap_create(mos,
+		    DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx);
+	}
+
+	while (whopair = nvlist_next_nvpair(nvp, whopair)) {
+		const char *whokey = nvpair_name(whopair);
+		nvlist_t *perms;
+		nvpair_t *permpair = NULL;
+		uint64_t jumpobj;
+
+		VERIFY(nvpair_value_nvlist(whopair, &perms) == 0);
+
+		if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) != 0) {
+			jumpobj = zap_create(mos, DMU_OT_DSL_PERMS,
+			    DMU_OT_NONE, 0, tx);
+			VERIFY(zap_update(mos, zapobj,
+			    whokey, 8, 1, &jumpobj, tx) == 0);
+		}
+
+		while (permpair = nvlist_next_nvpair(perms, permpair)) {
+			const char *perm = nvpair_name(permpair);
+			uint64_t n = 0;
+
+			VERIFY(zap_update(mos, jumpobj,
+			    perm, 8, 1, &n, tx) == 0);
+			spa_history_log_internal(LOG_DS_PERM_UPDATE,
+			    dd->dd_pool->dp_spa, tx,
+			    "%s %s dataset = %llu", whokey, perm,
+			    dd->dd_phys->dd_head_dataset_obj);
+		}
+	}
+}
+
+static void
+dsl_deleg_unset_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dir_t *dd = arg1;
+	nvlist_t *nvp = arg2;
+	objset_t *mos = dd->dd_pool->dp_meta_objset;
+	nvpair_t *whopair = NULL;
+	uint64_t zapobj = dd->dd_phys->dd_deleg_zapobj;
+
+	if (zapobj == 0)
+		return;
+
+	while (whopair = nvlist_next_nvpair(nvp, whopair)) {
+		const char *whokey = nvpair_name(whopair);
+		nvlist_t *perms;
+		nvpair_t *permpair = NULL;
+		uint64_t jumpobj;
+
+		if (nvpair_value_nvlist(whopair, &perms) != 0) {
+			if (zap_lookup(mos, zapobj, whokey, 8,
+			    1, &jumpobj) == 0) {
+				(void) zap_remove(mos, zapobj, whokey, tx);
+				VERIFY(0 == zap_destroy(mos, jumpobj, tx));
+			}
+			spa_history_log_internal(LOG_DS_PERM_WHO_REMOVE,
+			    dd->dd_pool->dp_spa, tx,
+			    "%s dataset = %llu", whokey,
+			    dd->dd_phys->dd_head_dataset_obj);
+			continue;
+		}
+
+		if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) != 0)
+			continue;
+
+		while (permpair = nvlist_next_nvpair(perms, permpair)) {
+			const char *perm = nvpair_name(permpair);
+			uint64_t n = 0;
+
+			(void) zap_remove(mos, jumpobj, perm, tx);
+			if (zap_count(mos, jumpobj, &n) == 0 && n == 0) {
+				(void) zap_remove(mos, zapobj,
+				    whokey, tx);
+				VERIFY(0 == zap_destroy(mos,
+				    jumpobj, tx));
+			}
+			spa_history_log_internal(LOG_DS_PERM_REMOVE,
+			    dd->dd_pool->dp_spa, tx,
+			    "%s %s dataset = %llu", whokey, perm,
+			    dd->dd_phys->dd_head_dataset_obj);
+		}
+	}
+}
+
+int
+dsl_deleg_set(const char *ddname, nvlist_t *nvp, boolean_t unset)
+{
+	dsl_dir_t *dd;
+	int error;
+	nvpair_t *whopair = NULL;
+	int blocks_modified = 0;
+
+	error = dsl_dir_open(ddname, FTAG, &dd, NULL);
+	if (error)
+		return (error);
+
+	if (spa_version(dmu_objset_spa(dd->dd_pool->dp_meta_objset)) <
+	    SPA_VERSION_DELEGATED_PERMS) {
+		dsl_dir_close(dd, FTAG);
+		return (ENOTSUP);
+	}
+
+	while (whopair = nvlist_next_nvpair(nvp, whopair))
+		blocks_modified++;
+
+	error = dsl_sync_task_do(dd->dd_pool, NULL,
+	    unset ? dsl_deleg_unset_sync : dsl_deleg_set_sync,
+	    dd, nvp, blocks_modified);
+	dsl_dir_close(dd, FTAG);
+
+	return (error);
+}
+
+/*
+ * Find all 'allow' permissions from a given point and then continue
+ * traversing up to the root.
+ *
+ * This function constructs an nvlist of nvlists.
+ * each setpoint is an nvlist composed of an nvlist of an nvlist
+ * of the individual * users/groups/everyone/create
+ * permissions.
+ *
+ * The nvlist will look like this.
+ *
+ * { source fsname -> { whokeys { permissions,...}, ...}}
+ *
+ * The fsname nvpairs will be arranged in a bottom up order.  For example,
+ * if we have the following structure a/b/c then the nvpairs for the fsnames
+ * will be ordered a/b/c, a/b, a.
+ */
+int
+dsl_deleg_get(const char *ddname, nvlist_t **nvp)
+{
+	dsl_dir_t *dd, *startdd;
+	dsl_pool_t *dp;
+	int error;
+	objset_t *mos;
+
+	error = dsl_dir_open(ddname, FTAG, &startdd, NULL);
+	if (error)
+		return (error);
+
+	dp = startdd->dd_pool;
+	mos = dp->dp_meta_objset;
+
+	VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+	for (dd = startdd; dd != NULL; dd = dd->dd_parent) {
+		zap_cursor_t basezc;
+		zap_attribute_t baseza;
+		nvlist_t *sp_nvp;
+		uint64_t n;
+		char source[MAXNAMELEN];
+
+		if (dd->dd_phys->dd_deleg_zapobj &&
+		    (zap_count(mos, dd->dd_phys->dd_deleg_zapobj,
+		    &n) == 0) && n) {
+			VERIFY(nvlist_alloc(&sp_nvp,
+			    NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		} else {
+			continue;
+		}
+
+		for (zap_cursor_init(&basezc, mos,
+		    dd->dd_phys->dd_deleg_zapobj);
+		    zap_cursor_retrieve(&basezc, &baseza) == 0;
+		    zap_cursor_advance(&basezc)) {
+			zap_cursor_t zc;
+			zap_attribute_t za;
+			nvlist_t *perms_nvp;
+
+			ASSERT(baseza.za_integer_length == 8);
+			ASSERT(baseza.za_num_integers == 1);
+
+			VERIFY(nvlist_alloc(&perms_nvp,
+			    NV_UNIQUE_NAME, KM_SLEEP) == 0);
+			for (zap_cursor_init(&zc, mos, baseza.za_first_integer);
+			    zap_cursor_retrieve(&zc, &za) == 0;
+			    zap_cursor_advance(&zc)) {
+				VERIFY(nvlist_add_boolean(perms_nvp,
+				    za.za_name) == 0);
+			}
+			zap_cursor_fini(&zc);
+			VERIFY(nvlist_add_nvlist(sp_nvp, baseza.za_name,
+			    perms_nvp) == 0);
+			nvlist_free(perms_nvp);
+		}
+
+		zap_cursor_fini(&basezc);
+
+		dsl_dir_name(dd, source);
+		VERIFY(nvlist_add_nvlist(*nvp, source, sp_nvp) == 0);
+		nvlist_free(sp_nvp);
+	}
+	rw_exit(&dp->dp_config_rwlock);
+
+	dsl_dir_close(startdd, FTAG);
+	return (0);
+}
+
+/*
+ * Routines for dsl_deleg_access() -- access checking.
+ */
+typedef struct perm_set {
+	avl_node_t	p_node;
+	boolean_t	p_matched;
+	char		p_setname[ZFS_MAX_DELEG_NAME];
+} perm_set_t;
+
+static int
+perm_set_compare(const void *arg1, const void *arg2)
+{
+	const perm_set_t *node1 = arg1;
+	const perm_set_t *node2 = arg2;
+	int val;
+
+	val = strcmp(node1->p_setname, node2->p_setname);
+	if (val == 0)
+		return (0);
+	return (val > 0 ? 1 : -1);
+}
+
+/*
+ * Determine whether a specified permission exists.
+ *
+ * First the base attribute has to be retrieved.  i.e. ul$12
+ * Once the base object has been retrieved the actual permission
+ * is lookup up in the zap object the base object points to.
+ *
+ * Return 0 if permission exists, ENOENT if there is no whokey, EPERM if
+ * there is no perm in that jumpobj.
+ */
+static int
+dsl_check_access(objset_t *mos, uint64_t zapobj,
+    char type, char checkflag, void *valp, const char *perm)
+{
+	int error;
+	uint64_t jumpobj, zero;
+	char whokey[ZFS_MAX_DELEG_NAME];
+
+	zfs_deleg_whokey(whokey, type, checkflag, valp);
+	error = zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj);
+	if (error == 0) {
+		error = zap_lookup(mos, jumpobj, perm, 8, 1, &zero);
+		if (error == ENOENT)
+			error = EPERM;
+	}
+	return (error);
+}
+
+/*
+ * check a specified user/group for a requested permission
+ */
+static int
+dsl_check_user_access(objset_t *mos, uint64_t zapobj, const char *perm,
+    int checkflag, cred_t *cr)
+{
+	const	gid_t *gids;
+	int	ngids;
+	int	i;
+	uint64_t id;
+
+	/* check for user */
+	id = crgetuid(cr);
+	if (dsl_check_access(mos, zapobj,
+	    ZFS_DELEG_USER, checkflag, &id, perm) == 0)
+		return (0);
+
+	/* check for users primary group */
+	id = crgetgid(cr);
+	if (dsl_check_access(mos, zapobj,
+	    ZFS_DELEG_GROUP, checkflag, &id, perm) == 0)
+		return (0);
+
+	/* check for everyone entry */
+	id = -1;
+	if (dsl_check_access(mos, zapobj,
+	    ZFS_DELEG_EVERYONE, checkflag, &id, perm) == 0)
+		return (0);
+
+	/* check each supplemental group user is a member of */
+	ngids = crgetngroups(cr);
+	gids = crgetgroups(cr);
+	for (i = 0; i != ngids; i++) {
+		id = gids[i];
+		if (dsl_check_access(mos, zapobj,
+		    ZFS_DELEG_GROUP, checkflag, &id, perm) == 0)
+			return (0);
+	}
+
+	return (EPERM);
+}
+
+/*
+ * Iterate over the sets specified in the specified zapobj
+ * and load them into the permsets avl tree.
+ */
+static int
+dsl_load_sets(objset_t *mos, uint64_t zapobj,
+    char type, char checkflag, void *valp, avl_tree_t *avl)
+{
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	perm_set_t *permnode;
+	avl_index_t idx;
+	uint64_t jumpobj;
+	int error;
+	char whokey[ZFS_MAX_DELEG_NAME];
+
+	zfs_deleg_whokey(whokey, type, checkflag, valp);
+
+	error = zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj);
+	if (error != 0)
+		return (error);
+
+	for (zap_cursor_init(&zc, mos, jumpobj);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    zap_cursor_advance(&zc)) {
+		permnode = kmem_alloc(sizeof (perm_set_t), KM_SLEEP);
+		(void) strlcpy(permnode->p_setname, za.za_name,
+		    sizeof (permnode->p_setname));
+		permnode->p_matched = B_FALSE;
+
+		if (avl_find(avl, permnode, &idx) == NULL) {
+			avl_insert(avl, permnode, idx);
+		} else {
+			kmem_free(permnode, sizeof (perm_set_t));
+		}
+	}
+	zap_cursor_fini(&zc);
+	return (0);
+}
+
+/*
+ * Load all permissions user based on cred belongs to.
+ */
+static void
+dsl_load_user_sets(objset_t *mos, uint64_t zapobj, avl_tree_t *avl,
+    char checkflag, cred_t *cr)
+{
+	const	gid_t *gids;
+	int	ngids, i;
+	uint64_t id;
+
+	id = crgetuid(cr);
+	(void) dsl_load_sets(mos, zapobj,
+	    ZFS_DELEG_USER_SETS, checkflag, &id, avl);
+
+	id = crgetgid(cr);
+	(void) dsl_load_sets(mos, zapobj,
+	    ZFS_DELEG_GROUP_SETS, checkflag, &id, avl);
+
+	(void) dsl_load_sets(mos, zapobj,
+	    ZFS_DELEG_EVERYONE_SETS, checkflag, NULL, avl);
+
+	ngids = crgetngroups(cr);
+	gids = crgetgroups(cr);
+	for (i = 0; i != ngids; i++) {
+		id = gids[i];
+		(void) dsl_load_sets(mos, zapobj,
+		    ZFS_DELEG_GROUP_SETS, checkflag, &id, avl);
+	}
+}
+
+/*
+ * Check if user has requested permission.
+ */
+int
+dsl_deleg_access_impl(dsl_dataset_t *ds, const char *perm, cred_t *cr)
+{
+	dsl_dir_t *dd;
+	dsl_pool_t *dp;
+	void *cookie;
+	int	error;
+	char	checkflag;
+	objset_t *mos;
+	avl_tree_t permsets;
+	perm_set_t *setnode;
+
+	dp = ds->ds_dir->dd_pool;
+	mos = dp->dp_meta_objset;
+
+	if (dsl_delegation_on(mos) == B_FALSE)
+		return (ECANCELED);
+
+	if (spa_version(dmu_objset_spa(dp->dp_meta_objset)) <
+	    SPA_VERSION_DELEGATED_PERMS)
+		return (EPERM);
+
+	if (dsl_dataset_is_snapshot(ds)) {
+		/*
+		 * Snapshots are treated as descendents only,
+		 * local permissions do not apply.
+		 */
+		checkflag = ZFS_DELEG_DESCENDENT;
+	} else {
+		checkflag = ZFS_DELEG_LOCAL;
+	}
+
+	avl_create(&permsets, perm_set_compare, sizeof (perm_set_t),
+	    offsetof(perm_set_t, p_node));
+
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+	for (dd = ds->ds_dir; dd != NULL; dd = dd->dd_parent,
+	    checkflag = ZFS_DELEG_DESCENDENT) {
+		uint64_t zapobj;
+		boolean_t expanded;
+
+		/*
+		 * If not in global zone then make sure
+		 * the zoned property is set
+		 */
+		if (!INGLOBALZONE(curproc)) {
+			uint64_t zoned;
+
+			if (dsl_prop_get_dd(dd,
+			    zfs_prop_to_name(ZFS_PROP_ZONED),
+			    8, 1, &zoned, NULL, B_FALSE) != 0)
+				break;
+			if (!zoned)
+				break;
+		}
+		zapobj = dd->dd_phys->dd_deleg_zapobj;
+
+		if (zapobj == 0)
+			continue;
+
+		dsl_load_user_sets(mos, zapobj, &permsets, checkflag, cr);
+again:
+		expanded = B_FALSE;
+		for (setnode = avl_first(&permsets); setnode;
+		    setnode = AVL_NEXT(&permsets, setnode)) {
+			if (setnode->p_matched == B_TRUE)
+				continue;
+
+			/* See if this set directly grants this permission */
+			error = dsl_check_access(mos, zapobj,
+			    ZFS_DELEG_NAMED_SET, 0, setnode->p_setname, perm);
+			if (error == 0)
+				goto success;
+			if (error == EPERM)
+				setnode->p_matched = B_TRUE;
+
+			/* See if this set includes other sets */
+			error = dsl_load_sets(mos, zapobj,
+			    ZFS_DELEG_NAMED_SET_SETS, 0,
+			    setnode->p_setname, &permsets);
+			if (error == 0)
+				setnode->p_matched = expanded = B_TRUE;
+		}
+		/*
+		 * If we expanded any sets, that will define more sets,
+		 * which we need to check.
+		 */
+		if (expanded)
+			goto again;
+
+		error = dsl_check_user_access(mos, zapobj, perm, checkflag, cr);
+		if (error == 0)
+			goto success;
+	}
+	error = EPERM;
+success:
+	rw_exit(&dp->dp_config_rwlock);
+
+	cookie = NULL;
+	while ((setnode = avl_destroy_nodes(&permsets, &cookie)) != NULL)
+		kmem_free(setnode, sizeof (perm_set_t));
+
+	return (error);
+}
+
+int
+dsl_deleg_access(const char *dsname, const char *perm, cred_t *cr)
+{
+	dsl_dataset_t *ds;
+	int error;
+
+	error = dsl_dataset_hold(dsname, FTAG, &ds);
+	if (error)
+		return (error);
+
+	error = dsl_deleg_access_impl(ds, perm, cr);
+	dsl_dataset_rele(ds, FTAG);
+
+	return (error);
+}
+
+/*
+ * Other routines.
+ */
+
+static void
+copy_create_perms(dsl_dir_t *dd, uint64_t pzapobj,
+    boolean_t dosets, uint64_t uid, dmu_tx_t *tx)
+{
+	objset_t *mos = dd->dd_pool->dp_meta_objset;
+	uint64_t jumpobj, pjumpobj;
+	uint64_t zapobj = dd->dd_phys->dd_deleg_zapobj;
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	char whokey[ZFS_MAX_DELEG_NAME];
+
+	zfs_deleg_whokey(whokey,
+	    dosets ? ZFS_DELEG_CREATE_SETS : ZFS_DELEG_CREATE,
+	    ZFS_DELEG_LOCAL, NULL);
+	if (zap_lookup(mos, pzapobj, whokey, 8, 1, &pjumpobj) != 0)
+		return;
+
+	if (zapobj == 0) {
+		dmu_buf_will_dirty(dd->dd_dbuf, tx);
+		zapobj = dd->dd_phys->dd_deleg_zapobj = zap_create(mos,
+		    DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx);
+	}
+
+	zfs_deleg_whokey(whokey,
+	    dosets ? ZFS_DELEG_USER_SETS : ZFS_DELEG_USER,
+	    ZFS_DELEG_LOCAL, &uid);
+	if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) == ENOENT) {
+		jumpobj = zap_create(mos, DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx);
+		VERIFY(zap_add(mos, zapobj, whokey, 8, 1, &jumpobj, tx) == 0);
+	}
+
+	for (zap_cursor_init(&zc, mos, pjumpobj);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    zap_cursor_advance(&zc)) {
+		uint64_t zero = 0;
+		ASSERT(za.za_integer_length == 8 && za.za_num_integers == 1);
+
+		VERIFY(zap_update(mos, jumpobj, za.za_name,
+		    8, 1, &zero, tx) == 0);
+	}
+	zap_cursor_fini(&zc);
+}
+
+/*
+ * set all create time permission on new dataset.
+ */
+void
+dsl_deleg_set_create_perms(dsl_dir_t *sdd, dmu_tx_t *tx, cred_t *cr)
+{
+	dsl_dir_t *dd;
+	uint64_t uid = crgetuid(cr);
+
+	if (spa_version(dmu_objset_spa(sdd->dd_pool->dp_meta_objset)) <
+	    SPA_VERSION_DELEGATED_PERMS)
+		return;
+
+	for (dd = sdd->dd_parent; dd != NULL; dd = dd->dd_parent) {
+		uint64_t pzapobj = dd->dd_phys->dd_deleg_zapobj;
+
+		if (pzapobj == 0)
+			continue;
+
+		copy_create_perms(sdd, pzapobj, B_FALSE, uid, tx);
+		copy_create_perms(sdd, pzapobj, B_TRUE, uid, tx);
+	}
+}
+
+int
+dsl_deleg_destroy(objset_t *mos, uint64_t zapobj, dmu_tx_t *tx)
+{
+	zap_cursor_t zc;
+	zap_attribute_t za;
+
+	if (zapobj == 0)
+		return (0);
+
+	for (zap_cursor_init(&zc, mos, zapobj);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    zap_cursor_advance(&zc)) {
+		ASSERT(za.za_integer_length == 8 && za.za_num_integers == 1);
+		VERIFY(0 == zap_destroy(mos, za.za_first_integer, tx));
+	}
+	zap_cursor_fini(&zc);
+	VERIFY(0 == zap_destroy(mos, zapobj, tx));
+	return (0);
+}
+
+boolean_t
+dsl_delegation_on(objset_t *os)
+{
+	return (!!spa_delegation(os->os_spa));
+}
diff --git a/uts/common/fs/zfs/dsl_dir.c b/uts/common/fs/zfs/dsl_dir.c
new file mode 100644
index 000000000000..1cd49c8274e8
--- /dev/null
+++ b/uts/common/fs/zfs/dsl_dir.c
@@ -0,0 +1,1416 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/dmu.h>
+#include <sys/dmu_objset.h>
+#include <sys/dmu_tx.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_synctask.h>
+#include <sys/dsl_deleg.h>
+#include <sys/spa.h>
+#include <sys/metaslab.h>
+#include <sys/zap.h>
+#include <sys/zio.h>
+#include <sys/arc.h>
+#include <sys/sunddi.h>
+#include "zfs_namecheck.h"
+
+static uint64_t dsl_dir_space_towrite(dsl_dir_t *dd);
+static void dsl_dir_set_reservation_sync(void *arg1, void *arg2, dmu_tx_t *tx);
+
+
+/* ARGSUSED */
+static void
+dsl_dir_evict(dmu_buf_t *db, void *arg)
+{
+	dsl_dir_t *dd = arg;
+	dsl_pool_t *dp = dd->dd_pool;
+	int t;
+
+	for (t = 0; t < TXG_SIZE; t++) {
+		ASSERT(!txg_list_member(&dp->dp_dirty_dirs, dd, t));
+		ASSERT(dd->dd_tempreserved[t] == 0);
+		ASSERT(dd->dd_space_towrite[t] == 0);
+	}
+
+	if (dd->dd_parent)
+		dsl_dir_close(dd->dd_parent, dd);
+
+	spa_close(dd->dd_pool->dp_spa, dd);
+
+	/*
+	 * The props callback list should have been cleaned up by
+	 * objset_evict().
+	 */
+	list_destroy(&dd->dd_prop_cbs);
+	mutex_destroy(&dd->dd_lock);
+	kmem_free(dd, sizeof (dsl_dir_t));
+}
+
+int
+dsl_dir_open_obj(dsl_pool_t *dp, uint64_t ddobj,
+    const char *tail, void *tag, dsl_dir_t **ddp)
+{
+	dmu_buf_t *dbuf;
+	dsl_dir_t *dd;
+	int err;
+
+	ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) ||
+	    dsl_pool_sync_context(dp));
+
+	err = dmu_bonus_hold(dp->dp_meta_objset, ddobj, tag, &dbuf);
+	if (err)
+		return (err);
+	dd = dmu_buf_get_user(dbuf);
+#ifdef ZFS_DEBUG
+	{
+		dmu_object_info_t doi;
+		dmu_object_info_from_db(dbuf, &doi);
+		ASSERT3U(doi.doi_type, ==, DMU_OT_DSL_DIR);
+		ASSERT3U(doi.doi_bonus_size, >=, sizeof (dsl_dir_phys_t));
+	}
+#endif
+	if (dd == NULL) {
+		dsl_dir_t *winner;
+
+		dd = kmem_zalloc(sizeof (dsl_dir_t), KM_SLEEP);
+		dd->dd_object = ddobj;
+		dd->dd_dbuf = dbuf;
+		dd->dd_pool = dp;
+		dd->dd_phys = dbuf->db_data;
+		mutex_init(&dd->dd_lock, NULL, MUTEX_DEFAULT, NULL);
+
+		list_create(&dd->dd_prop_cbs, sizeof (dsl_prop_cb_record_t),
+		    offsetof(dsl_prop_cb_record_t, cbr_node));
+
+		dsl_dir_snap_cmtime_update(dd);
+
+		if (dd->dd_phys->dd_parent_obj) {
+			err = dsl_dir_open_obj(dp, dd->dd_phys->dd_parent_obj,
+			    NULL, dd, &dd->dd_parent);
+			if (err)
+				goto errout;
+			if (tail) {
+#ifdef ZFS_DEBUG
+				uint64_t foundobj;
+
+				err = zap_lookup(dp->dp_meta_objset,
+				    dd->dd_parent->dd_phys->dd_child_dir_zapobj,
+				    tail, sizeof (foundobj), 1, &foundobj);
+				ASSERT(err || foundobj == ddobj);
+#endif
+				(void) strcpy(dd->dd_myname, tail);
+			} else {
+				err = zap_value_search(dp->dp_meta_objset,
+				    dd->dd_parent->dd_phys->dd_child_dir_zapobj,
+				    ddobj, 0, dd->dd_myname);
+			}
+			if (err)
+				goto errout;
+		} else {
+			(void) strcpy(dd->dd_myname, spa_name(dp->dp_spa));
+		}
+
+		if (dsl_dir_is_clone(dd)) {
+			dmu_buf_t *origin_bonus;
+			dsl_dataset_phys_t *origin_phys;
+
+			/*
+			 * We can't open the origin dataset, because
+			 * that would require opening this dsl_dir.
+			 * Just look at its phys directly instead.
+			 */
+			err = dmu_bonus_hold(dp->dp_meta_objset,
+			    dd->dd_phys->dd_origin_obj, FTAG, &origin_bonus);
+			if (err)
+				goto errout;
+			origin_phys = origin_bonus->db_data;
+			dd->dd_origin_txg =
+			    origin_phys->ds_creation_txg;
+			dmu_buf_rele(origin_bonus, FTAG);
+		}
+
+		winner = dmu_buf_set_user_ie(dbuf, dd, &dd->dd_phys,
+		    dsl_dir_evict);
+		if (winner) {
+			if (dd->dd_parent)
+				dsl_dir_close(dd->dd_parent, dd);
+			mutex_destroy(&dd->dd_lock);
+			kmem_free(dd, sizeof (dsl_dir_t));
+			dd = winner;
+		} else {
+			spa_open_ref(dp->dp_spa, dd);
+		}
+	}
+
+	/*
+	 * The dsl_dir_t has both open-to-close and instantiate-to-evict
+	 * holds on the spa.  We need the open-to-close holds because
+	 * otherwise the spa_refcnt wouldn't change when we open a
+	 * dir which the spa also has open, so we could incorrectly
+	 * think it was OK to unload/export/destroy the pool.  We need
+	 * the instantiate-to-evict hold because the dsl_dir_t has a
+	 * pointer to the dd_pool, which has a pointer to the spa_t.
+	 */
+	spa_open_ref(dp->dp_spa, tag);
+	ASSERT3P(dd->dd_pool, ==, dp);
+	ASSERT3U(dd->dd_object, ==, ddobj);
+	ASSERT3P(dd->dd_dbuf, ==, dbuf);
+	*ddp = dd;
+	return (0);
+
+errout:
+	if (dd->dd_parent)
+		dsl_dir_close(dd->dd_parent, dd);
+	mutex_destroy(&dd->dd_lock);
+	kmem_free(dd, sizeof (dsl_dir_t));
+	dmu_buf_rele(dbuf, tag);
+	return (err);
+
+}
+
+void
+dsl_dir_close(dsl_dir_t *dd, void *tag)
+{
+	dprintf_dd(dd, "%s\n", "");
+	spa_close(dd->dd_pool->dp_spa, tag);
+	dmu_buf_rele(dd->dd_dbuf, tag);
+}
+
+/* buf must be long enough (MAXNAMELEN + strlen(MOS_DIR_NAME) + 1 should do) */
+void
+dsl_dir_name(dsl_dir_t *dd, char *buf)
+{
+	if (dd->dd_parent) {
+		dsl_dir_name(dd->dd_parent, buf);
+		(void) strcat(buf, "/");
+	} else {
+		buf[0] = '\0';
+	}
+	if (!MUTEX_HELD(&dd->dd_lock)) {
+		/*
+		 * recursive mutex so that we can use
+		 * dprintf_dd() with dd_lock held
+		 */
+		mutex_enter(&dd->dd_lock);
+		(void) strcat(buf, dd->dd_myname);
+		mutex_exit(&dd->dd_lock);
+	} else {
+		(void) strcat(buf, dd->dd_myname);
+	}
+}
+
+/* Calculate name legnth, avoiding all the strcat calls of dsl_dir_name */
+int
+dsl_dir_namelen(dsl_dir_t *dd)
+{
+	int result = 0;
+
+	if (dd->dd_parent) {
+		/* parent's name + 1 for the "/" */
+		result = dsl_dir_namelen(dd->dd_parent) + 1;
+	}
+
+	if (!MUTEX_HELD(&dd->dd_lock)) {
+		/* see dsl_dir_name */
+		mutex_enter(&dd->dd_lock);
+		result += strlen(dd->dd_myname);
+		mutex_exit(&dd->dd_lock);
+	} else {
+		result += strlen(dd->dd_myname);
+	}
+
+	return (result);
+}
+
+static int
+getcomponent(const char *path, char *component, const char **nextp)
+{
+	char *p;
+	if ((path == NULL) || (path[0] == '\0'))
+		return (ENOENT);
+	/* This would be a good place to reserve some namespace... */
+	p = strpbrk(path, "/@");
+	if (p && (p[1] == '/' || p[1] == '@')) {
+		/* two separators in a row */
+		return (EINVAL);
+	}
+	if (p == NULL || p == path) {
+		/*
+		 * if the first thing is an @ or /, it had better be an
+		 * @ and it had better not have any more ats or slashes,
+		 * and it had better have something after the @.
+		 */
+		if (p != NULL &&
+		    (p[0] != '@' || strpbrk(path+1, "/@") || p[1] == '\0'))
+			return (EINVAL);
+		if (strlen(path) >= MAXNAMELEN)
+			return (ENAMETOOLONG);
+		(void) strcpy(component, path);
+		p = NULL;
+	} else if (p[0] == '/') {
+		if (p-path >= MAXNAMELEN)
+			return (ENAMETOOLONG);
+		(void) strncpy(component, path, p - path);
+		component[p-path] = '\0';
+		p++;
+	} else if (p[0] == '@') {
+		/*
+		 * if the next separator is an @, there better not be
+		 * any more slashes.
+		 */
+		if (strchr(path, '/'))
+			return (EINVAL);
+		if (p-path >= MAXNAMELEN)
+			return (ENAMETOOLONG);
+		(void) strncpy(component, path, p - path);
+		component[p-path] = '\0';
+	} else {
+		ASSERT(!"invalid p");
+	}
+	*nextp = p;
+	return (0);
+}
+
+/*
+ * same as dsl_open_dir, ignore the first component of name and use the
+ * spa instead
+ */
+int
+dsl_dir_open_spa(spa_t *spa, const char *name, void *tag,
+    dsl_dir_t **ddp, const char **tailp)
+{
+	char buf[MAXNAMELEN];
+	const char *next, *nextnext = NULL;
+	int err;
+	dsl_dir_t *dd;
+	dsl_pool_t *dp;
+	uint64_t ddobj;
+	int openedspa = FALSE;
+
+	dprintf("%s\n", name);
+
+	err = getcomponent(name, buf, &next);
+	if (err)
+		return (err);
+	if (spa == NULL) {
+		err = spa_open(buf, &spa, FTAG);
+		if (err) {
+			dprintf("spa_open(%s) failed\n", buf);
+			return (err);
+		}
+		openedspa = TRUE;
+
+		/* XXX this assertion belongs in spa_open */
+		ASSERT(!dsl_pool_sync_context(spa_get_dsl(spa)));
+	}
+
+	dp = spa_get_dsl(spa);
+
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+	err = dsl_dir_open_obj(dp, dp->dp_root_dir_obj, NULL, tag, &dd);
+	if (err) {
+		rw_exit(&dp->dp_config_rwlock);
+		if (openedspa)
+			spa_close(spa, FTAG);
+		return (err);
+	}
+
+	while (next != NULL) {
+		dsl_dir_t *child_ds;
+		err = getcomponent(next, buf, &nextnext);
+		if (err)
+			break;
+		ASSERT(next[0] != '\0');
+		if (next[0] == '@')
+			break;
+		dprintf("looking up %s in obj%lld\n",
+		    buf, dd->dd_phys->dd_child_dir_zapobj);
+
+		err = zap_lookup(dp->dp_meta_objset,
+		    dd->dd_phys->dd_child_dir_zapobj,
+		    buf, sizeof (ddobj), 1, &ddobj);
+		if (err) {
+			if (err == ENOENT)
+				err = 0;
+			break;
+		}
+
+		err = dsl_dir_open_obj(dp, ddobj, buf, tag, &child_ds);
+		if (err)
+			break;
+		dsl_dir_close(dd, tag);
+		dd = child_ds;
+		next = nextnext;
+	}
+	rw_exit(&dp->dp_config_rwlock);
+
+	if (err) {
+		dsl_dir_close(dd, tag);
+		if (openedspa)
+			spa_close(spa, FTAG);
+		return (err);
+	}
+
+	/*
+	 * It's an error if there's more than one component left, or
+	 * tailp==NULL and there's any component left.
+	 */
+	if (next != NULL &&
+	    (tailp == NULL || (nextnext && nextnext[0] != '\0'))) {
+		/* bad path name */
+		dsl_dir_close(dd, tag);
+		dprintf("next=%p (%s) tail=%p\n", next, next?next:"", tailp);
+		err = ENOENT;
+	}
+	if (tailp)
+		*tailp = next;
+	if (openedspa)
+		spa_close(spa, FTAG);
+	*ddp = dd;
+	return (err);
+}
+
+/*
+ * Return the dsl_dir_t, and possibly the last component which couldn't
+ * be found in *tail.  Return NULL if the path is bogus, or if
+ * tail==NULL and we couldn't parse the whole name.  (*tail)[0] == '@'
+ * means that the last component is a snapshot.
+ */
+int
+dsl_dir_open(const char *name, void *tag, dsl_dir_t **ddp, const char **tailp)
+{
+	return (dsl_dir_open_spa(NULL, name, tag, ddp, tailp));
+}
+
+uint64_t
+dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds, const char *name,
+    dmu_tx_t *tx)
+{
+	objset_t *mos = dp->dp_meta_objset;
+	uint64_t ddobj;
+	dsl_dir_phys_t *ddphys;
+	dmu_buf_t *dbuf;
+
+	ddobj = dmu_object_alloc(mos, DMU_OT_DSL_DIR, 0,
+	    DMU_OT_DSL_DIR, sizeof (dsl_dir_phys_t), tx);
+	if (pds) {
+		VERIFY(0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj,
+		    name, sizeof (uint64_t), 1, &ddobj, tx));
+	} else {
+		/* it's the root dir */
+		VERIFY(0 == zap_add(mos, DMU_POOL_DIRECTORY_OBJECT,
+		    DMU_POOL_ROOT_DATASET, sizeof (uint64_t), 1, &ddobj, tx));
+	}
+	VERIFY(0 == dmu_bonus_hold(mos, ddobj, FTAG, &dbuf));
+	dmu_buf_will_dirty(dbuf, tx);
+	ddphys = dbuf->db_data;
+
+	ddphys->dd_creation_time = gethrestime_sec();
+	if (pds)
+		ddphys->dd_parent_obj = pds->dd_object;
+	ddphys->dd_props_zapobj = zap_create(mos,
+	    DMU_OT_DSL_PROPS, DMU_OT_NONE, 0, tx);
+	ddphys->dd_child_dir_zapobj = zap_create(mos,
+	    DMU_OT_DSL_DIR_CHILD_MAP, DMU_OT_NONE, 0, tx);
+	if (spa_version(dp->dp_spa) >= SPA_VERSION_USED_BREAKDOWN)
+		ddphys->dd_flags |= DD_FLAG_USED_BREAKDOWN;
+	dmu_buf_rele(dbuf, FTAG);
+
+	return (ddobj);
+}
+
+/* ARGSUSED */
+int
+dsl_dir_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_dir_t *dd = ds->ds_dir;
+	dsl_pool_t *dp = dd->dd_pool;
+	objset_t *mos = dp->dp_meta_objset;
+	int err;
+	uint64_t count;
+
+	/*
+	 * There should be exactly two holds, both from
+	 * dsl_dataset_destroy: one on the dd directory, and one on its
+	 * head ds.  Otherwise, someone is trying to lookup something
+	 * inside this dir while we want to destroy it.  The
+	 * config_rwlock ensures that nobody else opens it after we
+	 * check.
+	 */
+	if (dmu_buf_refcount(dd->dd_dbuf) > 2)
+		return (EBUSY);
+
+	err = zap_count(mos, dd->dd_phys->dd_child_dir_zapobj, &count);
+	if (err)
+		return (err);
+	if (count != 0)
+		return (EEXIST);
+
+	return (0);
+}
+
+void
+dsl_dir_destroy_sync(void *arg1, void *tag, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_dir_t *dd = ds->ds_dir;
+	objset_t *mos = dd->dd_pool->dp_meta_objset;
+	dsl_prop_setarg_t psa;
+	uint64_t value = 0;
+	uint64_t obj;
+	dd_used_t t;
+
+	ASSERT(RW_WRITE_HELD(&dd->dd_pool->dp_config_rwlock));
+	ASSERT(dd->dd_phys->dd_head_dataset_obj == 0);
+
+	/* Remove our reservation. */
+	dsl_prop_setarg_init_uint64(&psa, "reservation",
+	    (ZPROP_SRC_NONE | ZPROP_SRC_LOCAL | ZPROP_SRC_RECEIVED),
+	    &value);
+	psa.psa_effective_value = 0;	/* predict default value */
+
+	dsl_dir_set_reservation_sync(ds, &psa, tx);
+
+	ASSERT3U(dd->dd_phys->dd_used_bytes, ==, 0);
+	ASSERT3U(dd->dd_phys->dd_reserved, ==, 0);
+	for (t = 0; t < DD_USED_NUM; t++)
+		ASSERT3U(dd->dd_phys->dd_used_breakdown[t], ==, 0);
+
+	VERIFY(0 == zap_destroy(mos, dd->dd_phys->dd_child_dir_zapobj, tx));
+	VERIFY(0 == zap_destroy(mos, dd->dd_phys->dd_props_zapobj, tx));
+	VERIFY(0 == dsl_deleg_destroy(mos, dd->dd_phys->dd_deleg_zapobj, tx));
+	VERIFY(0 == zap_remove(mos,
+	    dd->dd_parent->dd_phys->dd_child_dir_zapobj, dd->dd_myname, tx));
+
+	obj = dd->dd_object;
+	dsl_dir_close(dd, tag);
+	VERIFY(0 == dmu_object_free(mos, obj, tx));
+}
+
+boolean_t
+dsl_dir_is_clone(dsl_dir_t *dd)
+{
+	return (dd->dd_phys->dd_origin_obj &&
+	    (dd->dd_pool->dp_origin_snap == NULL ||
+	    dd->dd_phys->dd_origin_obj !=
+	    dd->dd_pool->dp_origin_snap->ds_object));
+}
+
+void
+dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv)
+{
+	mutex_enter(&dd->dd_lock);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED,
+	    dd->dd_phys->dd_used_bytes);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_QUOTA, dd->dd_phys->dd_quota);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_RESERVATION,
+	    dd->dd_phys->dd_reserved);
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO,
+	    dd->dd_phys->dd_compressed_bytes == 0 ? 100 :
+	    (dd->dd_phys->dd_uncompressed_bytes * 100 /
+	    dd->dd_phys->dd_compressed_bytes));
+	if (dd->dd_phys->dd_flags & DD_FLAG_USED_BREAKDOWN) {
+		dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USEDSNAP,
+		    dd->dd_phys->dd_used_breakdown[DD_USED_SNAP]);
+		dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USEDDS,
+		    dd->dd_phys->dd_used_breakdown[DD_USED_HEAD]);
+		dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USEDREFRESERV,
+		    dd->dd_phys->dd_used_breakdown[DD_USED_REFRSRV]);
+		dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USEDCHILD,
+		    dd->dd_phys->dd_used_breakdown[DD_USED_CHILD] +
+		    dd->dd_phys->dd_used_breakdown[DD_USED_CHILD_RSRV]);
+	}
+	mutex_exit(&dd->dd_lock);
+
+	rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER);
+	if (dsl_dir_is_clone(dd)) {
+		dsl_dataset_t *ds;
+		char buf[MAXNAMELEN];
+
+		VERIFY(0 == dsl_dataset_hold_obj(dd->dd_pool,
+		    dd->dd_phys->dd_origin_obj, FTAG, &ds));
+		dsl_dataset_name(ds, buf);
+		dsl_dataset_rele(ds, FTAG);
+		dsl_prop_nvlist_add_string(nv, ZFS_PROP_ORIGIN, buf);
+	}
+	rw_exit(&dd->dd_pool->dp_config_rwlock);
+}
+
+void
+dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx)
+{
+	dsl_pool_t *dp = dd->dd_pool;
+
+	ASSERT(dd->dd_phys);
+
+	if (txg_list_add(&dp->dp_dirty_dirs, dd, tx->tx_txg) == 0) {
+		/* up the hold count until we can be written out */
+		dmu_buf_add_ref(dd->dd_dbuf, dd);
+	}
+}
+
+static int64_t
+parent_delta(dsl_dir_t *dd, uint64_t used, int64_t delta)
+{
+	uint64_t old_accounted = MAX(used, dd->dd_phys->dd_reserved);
+	uint64_t new_accounted = MAX(used + delta, dd->dd_phys->dd_reserved);
+	return (new_accounted - old_accounted);
+}
+
+void
+dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx)
+{
+	ASSERT(dmu_tx_is_syncing(tx));
+
+	dmu_buf_will_dirty(dd->dd_dbuf, tx);
+
+	mutex_enter(&dd->dd_lock);
+	ASSERT3U(dd->dd_tempreserved[tx->tx_txg&TXG_MASK], ==, 0);
+	dprintf_dd(dd, "txg=%llu towrite=%lluK\n", tx->tx_txg,
+	    dd->dd_space_towrite[tx->tx_txg&TXG_MASK] / 1024);
+	dd->dd_space_towrite[tx->tx_txg&TXG_MASK] = 0;
+	mutex_exit(&dd->dd_lock);
+
+	/* release the hold from dsl_dir_dirty */
+	dmu_buf_rele(dd->dd_dbuf, dd);
+}
+
+static uint64_t
+dsl_dir_space_towrite(dsl_dir_t *dd)
+{
+	uint64_t space = 0;
+	int i;
+
+	ASSERT(MUTEX_HELD(&dd->dd_lock));
+
+	for (i = 0; i < TXG_SIZE; i++) {
+		space += dd->dd_space_towrite[i&TXG_MASK];
+		ASSERT3U(dd->dd_space_towrite[i&TXG_MASK], >=, 0);
+	}
+	return (space);
+}
+
+/*
+ * How much space would dd have available if ancestor had delta applied
+ * to it?  If ondiskonly is set, we're only interested in what's
+ * on-disk, not estimated pending changes.
+ */
+uint64_t
+dsl_dir_space_available(dsl_dir_t *dd,
+    dsl_dir_t *ancestor, int64_t delta, int ondiskonly)
+{
+	uint64_t parentspace, myspace, quota, used;
+
+	/*
+	 * If there are no restrictions otherwise, assume we have
+	 * unlimited space available.
+	 */
+	quota = UINT64_MAX;
+	parentspace = UINT64_MAX;
+
+	if (dd->dd_parent != NULL) {
+		parentspace = dsl_dir_space_available(dd->dd_parent,
+		    ancestor, delta, ondiskonly);
+	}
+
+	mutex_enter(&dd->dd_lock);
+	if (dd->dd_phys->dd_quota != 0)
+		quota = dd->dd_phys->dd_quota;
+	used = dd->dd_phys->dd_used_bytes;
+	if (!ondiskonly)
+		used += dsl_dir_space_towrite(dd);
+
+	if (dd->dd_parent == NULL) {
+		uint64_t poolsize = dsl_pool_adjustedsize(dd->dd_pool, FALSE);
+		quota = MIN(quota, poolsize);
+	}
+
+	if (dd->dd_phys->dd_reserved > used && parentspace != UINT64_MAX) {
+		/*
+		 * We have some space reserved, in addition to what our
+		 * parent gave us.
+		 */
+		parentspace += dd->dd_phys->dd_reserved - used;
+	}
+
+	if (dd == ancestor) {
+		ASSERT(delta <= 0);
+		ASSERT(used >= -delta);
+		used += delta;
+		if (parentspace != UINT64_MAX)
+			parentspace -= delta;
+	}
+
+	if (used > quota) {
+		/* over quota */
+		myspace = 0;
+	} else {
+		/*
+		 * the lesser of the space provided by our parent and
+		 * the space left in our quota
+		 */
+		myspace = MIN(parentspace, quota - used);
+	}
+
+	mutex_exit(&dd->dd_lock);
+
+	return (myspace);
+}
+
+struct tempreserve {
+	list_node_t tr_node;
+	dsl_pool_t *tr_dp;
+	dsl_dir_t *tr_ds;
+	uint64_t tr_size;
+};
+
+static int
+dsl_dir_tempreserve_impl(dsl_dir_t *dd, uint64_t asize, boolean_t netfree,
+    boolean_t ignorequota, boolean_t checkrefquota, list_t *tr_list,
+    dmu_tx_t *tx, boolean_t first)
+{
+	uint64_t txg = tx->tx_txg;
+	uint64_t est_inflight, used_on_disk, quota, parent_rsrv;
+	uint64_t deferred = 0;
+	struct tempreserve *tr;
+	int retval = EDQUOT;
+	int txgidx = txg & TXG_MASK;
+	int i;
+	uint64_t ref_rsrv = 0;
+
+	ASSERT3U(txg, !=, 0);
+	ASSERT3S(asize, >, 0);
+
+	mutex_enter(&dd->dd_lock);
+
+	/*
+	 * Check against the dsl_dir's quota.  We don't add in the delta
+	 * when checking for over-quota because they get one free hit.
+	 */
+	est_inflight = dsl_dir_space_towrite(dd);
+	for (i = 0; i < TXG_SIZE; i++)
+		est_inflight += dd->dd_tempreserved[i];
+	used_on_disk = dd->dd_phys->dd_used_bytes;
+
+	/*
+	 * On the first iteration, fetch the dataset's used-on-disk and
+	 * refreservation values. Also, if checkrefquota is set, test if
+	 * allocating this space would exceed the dataset's refquota.
+	 */
+	if (first && tx->tx_objset) {
+		int error;
+		dsl_dataset_t *ds = tx->tx_objset->os_dsl_dataset;
+
+		error = dsl_dataset_check_quota(ds, checkrefquota,
+		    asize, est_inflight, &used_on_disk, &ref_rsrv);
+		if (error) {
+			mutex_exit(&dd->dd_lock);
+			return (error);
+		}
+	}
+
+	/*
+	 * If this transaction will result in a net free of space,
+	 * we want to let it through.
+	 */
+	if (ignorequota || netfree || dd->dd_phys->dd_quota == 0)
+		quota = UINT64_MAX;
+	else
+		quota = dd->dd_phys->dd_quota;
+
+	/*
+	 * Adjust the quota against the actual pool size at the root
+	 * minus any outstanding deferred frees.
+	 * To ensure that it's possible to remove files from a full
+	 * pool without inducing transient overcommits, we throttle
+	 * netfree transactions against a quota that is slightly larger,
+	 * but still within the pool's allocation slop.  In cases where
+	 * we're very close to full, this will allow a steady trickle of
+	 * removes to get through.
+	 */
+	if (dd->dd_parent == NULL) {
+		spa_t *spa = dd->dd_pool->dp_spa;
+		uint64_t poolsize = dsl_pool_adjustedsize(dd->dd_pool, netfree);
+		deferred = metaslab_class_get_deferred(spa_normal_class(spa));
+		if (poolsize - deferred < quota) {
+			quota = poolsize - deferred;
+			retval = ENOSPC;
+		}
+	}
+
+	/*
+	 * If they are requesting more space, and our current estimate
+	 * is over quota, they get to try again unless the actual
+	 * on-disk is over quota and there are no pending changes (which
+	 * may free up space for us).
+	 */
+	if (used_on_disk + est_inflight >= quota) {
+		if (est_inflight > 0 || used_on_disk < quota ||
+		    (retval == ENOSPC && used_on_disk < quota + deferred))
+			retval = ERESTART;
+		dprintf_dd(dd, "failing: used=%lluK inflight = %lluK "
+		    "quota=%lluK tr=%lluK err=%d\n",
+		    used_on_disk>>10, est_inflight>>10,
+		    quota>>10, asize>>10, retval);
+		mutex_exit(&dd->dd_lock);
+		return (retval);
+	}
+
+	/* We need to up our estimated delta before dropping dd_lock */
+	dd->dd_tempreserved[txgidx] += asize;
+
+	parent_rsrv = parent_delta(dd, used_on_disk + est_inflight,
+	    asize - ref_rsrv);
+	mutex_exit(&dd->dd_lock);
+
+	tr = kmem_zalloc(sizeof (struct tempreserve), KM_SLEEP);
+	tr->tr_ds = dd;
+	tr->tr_size = asize;
+	list_insert_tail(tr_list, tr);
+
+	/* see if it's OK with our parent */
+	if (dd->dd_parent && parent_rsrv) {
+		boolean_t ismos = (dd->dd_phys->dd_head_dataset_obj == 0);
+
+		return (dsl_dir_tempreserve_impl(dd->dd_parent,
+		    parent_rsrv, netfree, ismos, TRUE, tr_list, tx, FALSE));
+	} else {
+		return (0);
+	}
+}
+
+/*
+ * Reserve space in this dsl_dir, to be used in this tx's txg.
+ * After the space has been dirtied (and dsl_dir_willuse_space()
+ * has been called), the reservation should be canceled, using
+ * dsl_dir_tempreserve_clear().
+ */
+int
+dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t lsize, uint64_t asize,
+    uint64_t fsize, uint64_t usize, void **tr_cookiep, dmu_tx_t *tx)
+{
+	int err;
+	list_t *tr_list;
+
+	if (asize == 0) {
+		*tr_cookiep = NULL;
+		return (0);
+	}
+
+	tr_list = kmem_alloc(sizeof (list_t), KM_SLEEP);
+	list_create(tr_list, sizeof (struct tempreserve),
+	    offsetof(struct tempreserve, tr_node));
+	ASSERT3S(asize, >, 0);
+	ASSERT3S(fsize, >=, 0);
+
+	err = arc_tempreserve_space(lsize, tx->tx_txg);
+	if (err == 0) {
+		struct tempreserve *tr;
+
+		tr = kmem_zalloc(sizeof (struct tempreserve), KM_SLEEP);
+		tr->tr_size = lsize;
+		list_insert_tail(tr_list, tr);
+
+		err = dsl_pool_tempreserve_space(dd->dd_pool, asize, tx);
+	} else {
+		if (err == EAGAIN) {
+			txg_delay(dd->dd_pool, tx->tx_txg, 1);
+			err = ERESTART;
+		}
+		dsl_pool_memory_pressure(dd->dd_pool);
+	}
+
+	if (err == 0) {
+		struct tempreserve *tr;
+
+		tr = kmem_zalloc(sizeof (struct tempreserve), KM_SLEEP);
+		tr->tr_dp = dd->dd_pool;
+		tr->tr_size = asize;
+		list_insert_tail(tr_list, tr);
+
+		err = dsl_dir_tempreserve_impl(dd, asize, fsize >= asize,
+		    FALSE, asize > usize, tr_list, tx, TRUE);
+	}
+
+	if (err)
+		dsl_dir_tempreserve_clear(tr_list, tx);
+	else
+		*tr_cookiep = tr_list;
+
+	return (err);
+}
+
+/*
+ * Clear a temporary reservation that we previously made with
+ * dsl_dir_tempreserve_space().
+ */
+void
+dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx)
+{
+	int txgidx = tx->tx_txg & TXG_MASK;
+	list_t *tr_list = tr_cookie;
+	struct tempreserve *tr;
+
+	ASSERT3U(tx->tx_txg, !=, 0);
+
+	if (tr_cookie == NULL)
+		return;
+
+	while (tr = list_head(tr_list)) {
+		if (tr->tr_dp) {
+			dsl_pool_tempreserve_clear(tr->tr_dp, tr->tr_size, tx);
+		} else if (tr->tr_ds) {
+			mutex_enter(&tr->tr_ds->dd_lock);
+			ASSERT3U(tr->tr_ds->dd_tempreserved[txgidx], >=,
+			    tr->tr_size);
+			tr->tr_ds->dd_tempreserved[txgidx] -= tr->tr_size;
+			mutex_exit(&tr->tr_ds->dd_lock);
+		} else {
+			arc_tempreserve_clear(tr->tr_size);
+		}
+		list_remove(tr_list, tr);
+		kmem_free(tr, sizeof (struct tempreserve));
+	}
+
+	kmem_free(tr_list, sizeof (list_t));
+}
+
+static void
+dsl_dir_willuse_space_impl(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx)
+{
+	int64_t parent_space;
+	uint64_t est_used;
+
+	mutex_enter(&dd->dd_lock);
+	if (space > 0)
+		dd->dd_space_towrite[tx->tx_txg & TXG_MASK] += space;
+
+	est_used = dsl_dir_space_towrite(dd) + dd->dd_phys->dd_used_bytes;
+	parent_space = parent_delta(dd, est_used, space);
+	mutex_exit(&dd->dd_lock);
+
+	/* Make sure that we clean up dd_space_to* */
+	dsl_dir_dirty(dd, tx);
+
+	/* XXX this is potentially expensive and unnecessary... */
+	if (parent_space && dd->dd_parent)
+		dsl_dir_willuse_space_impl(dd->dd_parent, parent_space, tx);
+}
+
+/*
+ * Call in open context when we think we're going to write/free space,
+ * eg. when dirtying data.  Be conservative (ie. OK to write less than
+ * this or free more than this, but don't write more or free less).
+ */
+void
+dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx)
+{
+	dsl_pool_willuse_space(dd->dd_pool, space, tx);
+	dsl_dir_willuse_space_impl(dd, space, tx);
+}
+
+/* call from syncing context when we actually write/free space for this dd */
+void
+dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type,
+    int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx)
+{
+	int64_t accounted_delta;
+	boolean_t needlock = !MUTEX_HELD(&dd->dd_lock);
+
+	ASSERT(dmu_tx_is_syncing(tx));
+	ASSERT(type < DD_USED_NUM);
+
+	dsl_dir_dirty(dd, tx);
+
+	if (needlock)
+		mutex_enter(&dd->dd_lock);
+	accounted_delta = parent_delta(dd, dd->dd_phys->dd_used_bytes, used);
+	ASSERT(used >= 0 || dd->dd_phys->dd_used_bytes >= -used);
+	ASSERT(compressed >= 0 ||
+	    dd->dd_phys->dd_compressed_bytes >= -compressed);
+	ASSERT(uncompressed >= 0 ||
+	    dd->dd_phys->dd_uncompressed_bytes >= -uncompressed);
+	dd->dd_phys->dd_used_bytes += used;
+	dd->dd_phys->dd_uncompressed_bytes += uncompressed;
+	dd->dd_phys->dd_compressed_bytes += compressed;
+
+	if (dd->dd_phys->dd_flags & DD_FLAG_USED_BREAKDOWN) {
+		ASSERT(used > 0 ||
+		    dd->dd_phys->dd_used_breakdown[type] >= -used);
+		dd->dd_phys->dd_used_breakdown[type] += used;
+#ifdef DEBUG
+		dd_used_t t;
+		uint64_t u = 0;
+		for (t = 0; t < DD_USED_NUM; t++)
+			u += dd->dd_phys->dd_used_breakdown[t];
+		ASSERT3U(u, ==, dd->dd_phys->dd_used_bytes);
+#endif
+	}
+	if (needlock)
+		mutex_exit(&dd->dd_lock);
+
+	if (dd->dd_parent != NULL) {
+		dsl_dir_diduse_space(dd->dd_parent, DD_USED_CHILD,
+		    accounted_delta, compressed, uncompressed, tx);
+		dsl_dir_transfer_space(dd->dd_parent,
+		    used - accounted_delta,
+		    DD_USED_CHILD_RSRV, DD_USED_CHILD, tx);
+	}
+}
+
+void
+dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta,
+    dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx)
+{
+	boolean_t needlock = !MUTEX_HELD(&dd->dd_lock);
+
+	ASSERT(dmu_tx_is_syncing(tx));
+	ASSERT(oldtype < DD_USED_NUM);
+	ASSERT(newtype < DD_USED_NUM);
+
+	if (delta == 0 || !(dd->dd_phys->dd_flags & DD_FLAG_USED_BREAKDOWN))
+		return;
+
+	dsl_dir_dirty(dd, tx);
+	if (needlock)
+		mutex_enter(&dd->dd_lock);
+	ASSERT(delta > 0 ?
+	    dd->dd_phys->dd_used_breakdown[oldtype] >= delta :
+	    dd->dd_phys->dd_used_breakdown[newtype] >= -delta);
+	ASSERT(dd->dd_phys->dd_used_bytes >= ABS(delta));
+	dd->dd_phys->dd_used_breakdown[oldtype] -= delta;
+	dd->dd_phys->dd_used_breakdown[newtype] += delta;
+	if (needlock)
+		mutex_exit(&dd->dd_lock);
+}
+
+static int
+dsl_dir_set_quota_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_dir_t *dd = ds->ds_dir;
+	dsl_prop_setarg_t *psa = arg2;
+	int err;
+	uint64_t towrite;
+
+	if ((err = dsl_prop_predict_sync(ds->ds_dir, psa)) != 0)
+		return (err);
+
+	if (psa->psa_effective_value == 0)
+		return (0);
+
+	mutex_enter(&dd->dd_lock);
+	/*
+	 * If we are doing the preliminary check in open context, and
+	 * there are pending changes, then don't fail it, since the
+	 * pending changes could under-estimate the amount of space to be
+	 * freed up.
+	 */
+	towrite = dsl_dir_space_towrite(dd);
+	if ((dmu_tx_is_syncing(tx) || towrite == 0) &&
+	    (psa->psa_effective_value < dd->dd_phys->dd_reserved ||
+	    psa->psa_effective_value < dd->dd_phys->dd_used_bytes + towrite)) {
+		err = ENOSPC;
+	}
+	mutex_exit(&dd->dd_lock);
+	return (err);
+}
+
+extern dsl_syncfunc_t dsl_prop_set_sync;
+
+static void
+dsl_dir_set_quota_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_dir_t *dd = ds->ds_dir;
+	dsl_prop_setarg_t *psa = arg2;
+	uint64_t effective_value = psa->psa_effective_value;
+
+	dsl_prop_set_sync(ds, psa, tx);
+	DSL_PROP_CHECK_PREDICTION(dd, psa);
+
+	dmu_buf_will_dirty(dd->dd_dbuf, tx);
+
+	mutex_enter(&dd->dd_lock);
+	dd->dd_phys->dd_quota = effective_value;
+	mutex_exit(&dd->dd_lock);
+
+	spa_history_log_internal(LOG_DS_QUOTA, dd->dd_pool->dp_spa,
+	    tx, "%lld dataset = %llu ",
+	    (longlong_t)effective_value, dd->dd_phys->dd_head_dataset_obj);
+}
+
+int
+dsl_dir_set_quota(const char *ddname, zprop_source_t source, uint64_t quota)
+{
+	dsl_dir_t *dd;
+	dsl_dataset_t *ds;
+	dsl_prop_setarg_t psa;
+	int err;
+
+	dsl_prop_setarg_init_uint64(&psa, "quota", source, &quota);
+
+	err = dsl_dataset_hold(ddname, FTAG, &ds);
+	if (err)
+		return (err);
+
+	err = dsl_dir_open(ddname, FTAG, &dd, NULL);
+	if (err) {
+		dsl_dataset_rele(ds, FTAG);
+		return (err);
+	}
+
+	ASSERT(ds->ds_dir == dd);
+
+	/*
+	 * If someone removes a file, then tries to set the quota, we want to
+	 * make sure the file freeing takes effect.
+	 */
+	txg_wait_open(dd->dd_pool, 0);
+
+	err = dsl_sync_task_do(dd->dd_pool, dsl_dir_set_quota_check,
+	    dsl_dir_set_quota_sync, ds, &psa, 0);
+
+	dsl_dir_close(dd, FTAG);
+	dsl_dataset_rele(ds, FTAG);
+	return (err);
+}
+
+int
+dsl_dir_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_dir_t *dd = ds->ds_dir;
+	dsl_prop_setarg_t *psa = arg2;
+	uint64_t effective_value;
+	uint64_t used, avail;
+	int err;
+
+	if ((err = dsl_prop_predict_sync(ds->ds_dir, psa)) != 0)
+		return (err);
+
+	effective_value = psa->psa_effective_value;
+
+	/*
+	 * If we are doing the preliminary check in open context, the
+	 * space estimates may be inaccurate.
+	 */
+	if (!dmu_tx_is_syncing(tx))
+		return (0);
+
+	mutex_enter(&dd->dd_lock);
+	used = dd->dd_phys->dd_used_bytes;
+	mutex_exit(&dd->dd_lock);
+
+	if (dd->dd_parent) {
+		avail = dsl_dir_space_available(dd->dd_parent,
+		    NULL, 0, FALSE);
+	} else {
+		avail = dsl_pool_adjustedsize(dd->dd_pool, B_FALSE) - used;
+	}
+
+	if (MAX(used, effective_value) > MAX(used, dd->dd_phys->dd_reserved)) {
+		uint64_t delta = MAX(used, effective_value) -
+		    MAX(used, dd->dd_phys->dd_reserved);
+
+		if (delta > avail)
+			return (ENOSPC);
+		if (dd->dd_phys->dd_quota > 0 &&
+		    effective_value > dd->dd_phys->dd_quota)
+			return (ENOSPC);
+	}
+
+	return (0);
+}
+
+static void
+dsl_dir_set_reservation_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_dir_t *dd = ds->ds_dir;
+	dsl_prop_setarg_t *psa = arg2;
+	uint64_t effective_value = psa->psa_effective_value;
+	uint64_t used;
+	int64_t delta;
+
+	dsl_prop_set_sync(ds, psa, tx);
+	DSL_PROP_CHECK_PREDICTION(dd, psa);
+
+	dmu_buf_will_dirty(dd->dd_dbuf, tx);
+
+	mutex_enter(&dd->dd_lock);
+	used = dd->dd_phys->dd_used_bytes;
+	delta = MAX(used, effective_value) -
+	    MAX(used, dd->dd_phys->dd_reserved);
+	dd->dd_phys->dd_reserved = effective_value;
+
+	if (dd->dd_parent != NULL) {
+		/* Roll up this additional usage into our ancestors */
+		dsl_dir_diduse_space(dd->dd_parent, DD_USED_CHILD_RSRV,
+		    delta, 0, 0, tx);
+	}
+	mutex_exit(&dd->dd_lock);
+
+	spa_history_log_internal(LOG_DS_RESERVATION, dd->dd_pool->dp_spa,
+	    tx, "%lld dataset = %llu",
+	    (longlong_t)effective_value, dd->dd_phys->dd_head_dataset_obj);
+}
+
+int
+dsl_dir_set_reservation(const char *ddname, zprop_source_t source,
+    uint64_t reservation)
+{
+	dsl_dir_t *dd;
+	dsl_dataset_t *ds;
+	dsl_prop_setarg_t psa;
+	int err;
+
+	dsl_prop_setarg_init_uint64(&psa, "reservation", source, &reservation);
+
+	err = dsl_dataset_hold(ddname, FTAG, &ds);
+	if (err)
+		return (err);
+
+	err = dsl_dir_open(ddname, FTAG, &dd, NULL);
+	if (err) {
+		dsl_dataset_rele(ds, FTAG);
+		return (err);
+	}
+
+	ASSERT(ds->ds_dir == dd);
+
+	err = dsl_sync_task_do(dd->dd_pool, dsl_dir_set_reservation_check,
+	    dsl_dir_set_reservation_sync, ds, &psa, 0);
+
+	dsl_dir_close(dd, FTAG);
+	dsl_dataset_rele(ds, FTAG);
+	return (err);
+}
+
+static dsl_dir_t *
+closest_common_ancestor(dsl_dir_t *ds1, dsl_dir_t *ds2)
+{
+	for (; ds1; ds1 = ds1->dd_parent) {
+		dsl_dir_t *dd;
+		for (dd = ds2; dd; dd = dd->dd_parent) {
+			if (ds1 == dd)
+				return (dd);
+		}
+	}
+	return (NULL);
+}
+
+/*
+ * If delta is applied to dd, how much of that delta would be applied to
+ * ancestor?  Syncing context only.
+ */
+static int64_t
+would_change(dsl_dir_t *dd, int64_t delta, dsl_dir_t *ancestor)
+{
+	if (dd == ancestor)
+		return (delta);
+
+	mutex_enter(&dd->dd_lock);
+	delta = parent_delta(dd, dd->dd_phys->dd_used_bytes, delta);
+	mutex_exit(&dd->dd_lock);
+	return (would_change(dd->dd_parent, delta, ancestor));
+}
+
+struct renamearg {
+	dsl_dir_t *newparent;
+	const char *mynewname;
+};
+
+static int
+dsl_dir_rename_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dir_t *dd = arg1;
+	struct renamearg *ra = arg2;
+	dsl_pool_t *dp = dd->dd_pool;
+	objset_t *mos = dp->dp_meta_objset;
+	int err;
+	uint64_t val;
+
+	/*
+	 * There should only be one reference, from dmu_objset_rename().
+	 * Fleeting holds are also possible (eg, from "zfs list" getting
+	 * stats), but any that are present in open context will likely
+	 * be gone by syncing context, so only fail from syncing
+	 * context.
+	 */
+	if (dmu_tx_is_syncing(tx) && dmu_buf_refcount(dd->dd_dbuf) > 1)
+		return (EBUSY);
+
+	/* check for existing name */
+	err = zap_lookup(mos, ra->newparent->dd_phys->dd_child_dir_zapobj,
+	    ra->mynewname, 8, 1, &val);
+	if (err == 0)
+		return (EEXIST);
+	if (err != ENOENT)
+		return (err);
+
+	if (ra->newparent != dd->dd_parent) {
+		/* is there enough space? */
+		uint64_t myspace =
+		    MAX(dd->dd_phys->dd_used_bytes, dd->dd_phys->dd_reserved);
+
+		/* no rename into our descendant */
+		if (closest_common_ancestor(dd, ra->newparent) == dd)
+			return (EINVAL);
+
+		if (err = dsl_dir_transfer_possible(dd->dd_parent,
+		    ra->newparent, myspace))
+			return (err);
+	}
+
+	return (0);
+}
+
+static void
+dsl_dir_rename_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dir_t *dd = arg1;
+	struct renamearg *ra = arg2;
+	dsl_pool_t *dp = dd->dd_pool;
+	objset_t *mos = dp->dp_meta_objset;
+	int err;
+
+	ASSERT(dmu_buf_refcount(dd->dd_dbuf) <= 2);
+
+	if (ra->newparent != dd->dd_parent) {
+		dsl_dir_diduse_space(dd->dd_parent, DD_USED_CHILD,
+		    -dd->dd_phys->dd_used_bytes,
+		    -dd->dd_phys->dd_compressed_bytes,
+		    -dd->dd_phys->dd_uncompressed_bytes, tx);
+		dsl_dir_diduse_space(ra->newparent, DD_USED_CHILD,
+		    dd->dd_phys->dd_used_bytes,
+		    dd->dd_phys->dd_compressed_bytes,
+		    dd->dd_phys->dd_uncompressed_bytes, tx);
+
+		if (dd->dd_phys->dd_reserved > dd->dd_phys->dd_used_bytes) {
+			uint64_t unused_rsrv = dd->dd_phys->dd_reserved -
+			    dd->dd_phys->dd_used_bytes;
+
+			dsl_dir_diduse_space(dd->dd_parent, DD_USED_CHILD_RSRV,
+			    -unused_rsrv, 0, 0, tx);
+			dsl_dir_diduse_space(ra->newparent, DD_USED_CHILD_RSRV,
+			    unused_rsrv, 0, 0, tx);
+		}
+	}
+
+	dmu_buf_will_dirty(dd->dd_dbuf, tx);
+
+	/* remove from old parent zapobj */
+	err = zap_remove(mos, dd->dd_parent->dd_phys->dd_child_dir_zapobj,
+	    dd->dd_myname, tx);
+	ASSERT3U(err, ==, 0);
+
+	(void) strcpy(dd->dd_myname, ra->mynewname);
+	dsl_dir_close(dd->dd_parent, dd);
+	dd->dd_phys->dd_parent_obj = ra->newparent->dd_object;
+	VERIFY(0 == dsl_dir_open_obj(dd->dd_pool,
+	    ra->newparent->dd_object, NULL, dd, &dd->dd_parent));
+
+	/* add to new parent zapobj */
+	err = zap_add(mos, ra->newparent->dd_phys->dd_child_dir_zapobj,
+	    dd->dd_myname, 8, 1, &dd->dd_object, tx);
+	ASSERT3U(err, ==, 0);
+
+	spa_history_log_internal(LOG_DS_RENAME, dd->dd_pool->dp_spa,
+	    tx, "dataset = %llu", dd->dd_phys->dd_head_dataset_obj);
+}
+
+int
+dsl_dir_rename(dsl_dir_t *dd, const char *newname)
+{
+	struct renamearg ra;
+	int err;
+
+	/* new parent should exist */
+	err = dsl_dir_open(newname, FTAG, &ra.newparent, &ra.mynewname);
+	if (err)
+		return (err);
+
+	/* can't rename to different pool */
+	if (dd->dd_pool != ra.newparent->dd_pool) {
+		err = ENXIO;
+		goto out;
+	}
+
+	/* new name should not already exist */
+	if (ra.mynewname == NULL) {
+		err = EEXIST;
+		goto out;
+	}
+
+	err = dsl_sync_task_do(dd->dd_pool,
+	    dsl_dir_rename_check, dsl_dir_rename_sync, dd, &ra, 3);
+
+out:
+	dsl_dir_close(ra.newparent, FTAG);
+	return (err);
+}
+
+int
+dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, uint64_t space)
+{
+	dsl_dir_t *ancestor;
+	int64_t adelta;
+	uint64_t avail;
+
+	ancestor = closest_common_ancestor(sdd, tdd);
+	adelta = would_change(sdd, -space, ancestor);
+	avail = dsl_dir_space_available(tdd, ancestor, adelta, FALSE);
+	if (avail < space)
+		return (ENOSPC);
+
+	return (0);
+}
+
+timestruc_t
+dsl_dir_snap_cmtime(dsl_dir_t *dd)
+{
+	timestruc_t t;
+
+	mutex_enter(&dd->dd_lock);
+	t = dd->dd_snap_cmtime;
+	mutex_exit(&dd->dd_lock);
+
+	return (t);
+}
+
+void
+dsl_dir_snap_cmtime_update(dsl_dir_t *dd)
+{
+	timestruc_t t;
+
+	gethrestime(&t);
+	mutex_enter(&dd->dd_lock);
+	dd->dd_snap_cmtime = t;
+	mutex_exit(&dd->dd_lock);
+}
diff --git a/uts/common/fs/zfs/dsl_pool.c b/uts/common/fs/zfs/dsl_pool.c
new file mode 100644
index 000000000000..700cc962865d
--- /dev/null
+++ b/uts/common/fs/zfs/dsl_pool.c
@@ -0,0 +1,848 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/dsl_pool.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_synctask.h>
+#include <sys/dsl_scan.h>
+#include <sys/dnode.h>
+#include <sys/dmu_tx.h>
+#include <sys/dmu_objset.h>
+#include <sys/arc.h>
+#include <sys/zap.h>
+#include <sys/zio.h>
+#include <sys/zfs_context.h>
+#include <sys/fs/zfs.h>
+#include <sys/zfs_znode.h>
+#include <sys/spa_impl.h>
+#include <sys/dsl_deadlist.h>
+
+int zfs_no_write_throttle = 0;
+int zfs_write_limit_shift = 3;			/* 1/8th of physical memory */
+int zfs_txg_synctime_ms = 1000;		/* target millisecs to sync a txg */
+
+uint64_t zfs_write_limit_min = 32 << 20;	/* min write limit is 32MB */
+uint64_t zfs_write_limit_max = 0;		/* max data payload per txg */
+uint64_t zfs_write_limit_inflated = 0;
+uint64_t zfs_write_limit_override = 0;
+
+kmutex_t zfs_write_limit_lock;
+
+static pgcnt_t old_physmem = 0;
+
+int
+dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **ddp)
+{
+	uint64_t obj;
+	int err;
+
+	err = zap_lookup(dp->dp_meta_objset,
+	    dp->dp_root_dir->dd_phys->dd_child_dir_zapobj,
+	    name, sizeof (obj), 1, &obj);
+	if (err)
+		return (err);
+
+	return (dsl_dir_open_obj(dp, obj, name, dp, ddp));
+}
+
+static dsl_pool_t *
+dsl_pool_open_impl(spa_t *spa, uint64_t txg)
+{
+	dsl_pool_t *dp;
+	blkptr_t *bp = spa_get_rootblkptr(spa);
+
+	dp = kmem_zalloc(sizeof (dsl_pool_t), KM_SLEEP);
+	dp->dp_spa = spa;
+	dp->dp_meta_rootbp = *bp;
+	rw_init(&dp->dp_config_rwlock, NULL, RW_DEFAULT, NULL);
+	dp->dp_write_limit = zfs_write_limit_min;
+	txg_init(dp, txg);
+
+	txg_list_create(&dp->dp_dirty_datasets,
+	    offsetof(dsl_dataset_t, ds_dirty_link));
+	txg_list_create(&dp->dp_dirty_dirs,
+	    offsetof(dsl_dir_t, dd_dirty_link));
+	txg_list_create(&dp->dp_sync_tasks,
+	    offsetof(dsl_sync_task_group_t, dstg_node));
+	list_create(&dp->dp_synced_datasets, sizeof (dsl_dataset_t),
+	    offsetof(dsl_dataset_t, ds_synced_link));
+
+	mutex_init(&dp->dp_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	dp->dp_vnrele_taskq = taskq_create("zfs_vn_rele_taskq", 1, minclsyspri,
+	    1, 4, 0);
+
+	return (dp);
+}
+
+int
+dsl_pool_open(spa_t *spa, uint64_t txg, dsl_pool_t **dpp)
+{
+	int err;
+	dsl_pool_t *dp = dsl_pool_open_impl(spa, txg);
+	dsl_dir_t *dd;
+	dsl_dataset_t *ds;
+	uint64_t obj;
+
+	rw_enter(&dp->dp_config_rwlock, RW_WRITER);
+	err = dmu_objset_open_impl(spa, NULL, &dp->dp_meta_rootbp,
+	    &dp->dp_meta_objset);
+	if (err)
+		goto out;
+
+	err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+	    DMU_POOL_ROOT_DATASET, sizeof (uint64_t), 1,
+	    &dp->dp_root_dir_obj);
+	if (err)
+		goto out;
+
+	err = dsl_dir_open_obj(dp, dp->dp_root_dir_obj,
+	    NULL, dp, &dp->dp_root_dir);
+	if (err)
+		goto out;
+
+	err = dsl_pool_open_special_dir(dp, MOS_DIR_NAME, &dp->dp_mos_dir);
+	if (err)
+		goto out;
+
+	if (spa_version(spa) >= SPA_VERSION_ORIGIN) {
+		err = dsl_pool_open_special_dir(dp, ORIGIN_DIR_NAME, &dd);
+		if (err)
+			goto out;
+		err = dsl_dataset_hold_obj(dp, dd->dd_phys->dd_head_dataset_obj,
+		    FTAG, &ds);
+		if (err == 0) {
+			err = dsl_dataset_hold_obj(dp,
+			    ds->ds_phys->ds_prev_snap_obj, dp,
+			    &dp->dp_origin_snap);
+			dsl_dataset_rele(ds, FTAG);
+		}
+		dsl_dir_close(dd, dp);
+		if (err)
+			goto out;
+	}
+
+	if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
+		err = dsl_pool_open_special_dir(dp, FREE_DIR_NAME,
+		    &dp->dp_free_dir);
+		if (err)
+			goto out;
+
+		err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+		    DMU_POOL_FREE_BPOBJ, sizeof (uint64_t), 1, &obj);
+		if (err)
+			goto out;
+		VERIFY3U(0, ==, bpobj_open(&dp->dp_free_bpobj,
+		    dp->dp_meta_objset, obj));
+	}
+
+	err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+	    DMU_POOL_TMP_USERREFS, sizeof (uint64_t), 1,
+	    &dp->dp_tmp_userrefs_obj);
+	if (err == ENOENT)
+		err = 0;
+	if (err)
+		goto out;
+
+	err = dsl_scan_init(dp, txg);
+
+out:
+	rw_exit(&dp->dp_config_rwlock);
+	if (err)
+		dsl_pool_close(dp);
+	else
+		*dpp = dp;
+
+	return (err);
+}
+
+void
+dsl_pool_close(dsl_pool_t *dp)
+{
+	/* drop our references from dsl_pool_open() */
+
+	/*
+	 * Since we held the origin_snap from "syncing" context (which
+	 * includes pool-opening context), it actually only got a "ref"
+	 * and not a hold, so just drop that here.
+	 */
+	if (dp->dp_origin_snap)
+		dsl_dataset_drop_ref(dp->dp_origin_snap, dp);
+	if (dp->dp_mos_dir)
+		dsl_dir_close(dp->dp_mos_dir, dp);
+	if (dp->dp_free_dir)
+		dsl_dir_close(dp->dp_free_dir, dp);
+	if (dp->dp_root_dir)
+		dsl_dir_close(dp->dp_root_dir, dp);
+
+	bpobj_close(&dp->dp_free_bpobj);
+
+	/* undo the dmu_objset_open_impl(mos) from dsl_pool_open() */
+	if (dp->dp_meta_objset)
+		dmu_objset_evict(dp->dp_meta_objset);
+
+	txg_list_destroy(&dp->dp_dirty_datasets);
+	txg_list_destroy(&dp->dp_sync_tasks);
+	txg_list_destroy(&dp->dp_dirty_dirs);
+	list_destroy(&dp->dp_synced_datasets);
+
+	arc_flush(dp->dp_spa);
+	txg_fini(dp);
+	dsl_scan_fini(dp);
+	rw_destroy(&dp->dp_config_rwlock);
+	mutex_destroy(&dp->dp_lock);
+	taskq_destroy(dp->dp_vnrele_taskq);
+	if (dp->dp_blkstats)
+		kmem_free(dp->dp_blkstats, sizeof (zfs_all_blkstats_t));
+	kmem_free(dp, sizeof (dsl_pool_t));
+}
+
+dsl_pool_t *
+dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg)
+{
+	int err;
+	dsl_pool_t *dp = dsl_pool_open_impl(spa, txg);
+	dmu_tx_t *tx = dmu_tx_create_assigned(dp, txg);
+	objset_t *os;
+	dsl_dataset_t *ds;
+	uint64_t obj;
+
+	/* create and open the MOS (meta-objset) */
+	dp->dp_meta_objset = dmu_objset_create_impl(spa,
+	    NULL, &dp->dp_meta_rootbp, DMU_OST_META, tx);
+
+	/* create the pool directory */
+	err = zap_create_claim(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+	    DMU_OT_OBJECT_DIRECTORY, DMU_OT_NONE, 0, tx);
+	ASSERT3U(err, ==, 0);
+
+	/* Initialize scan structures */
+	VERIFY3U(0, ==, dsl_scan_init(dp, txg));
+
+	/* create and open the root dir */
+	dp->dp_root_dir_obj = dsl_dir_create_sync(dp, NULL, NULL, tx);
+	VERIFY(0 == dsl_dir_open_obj(dp, dp->dp_root_dir_obj,
+	    NULL, dp, &dp->dp_root_dir));
+
+	/* create and open the meta-objset dir */
+	(void) dsl_dir_create_sync(dp, dp->dp_root_dir, MOS_DIR_NAME, tx);
+	VERIFY(0 == dsl_pool_open_special_dir(dp,
+	    MOS_DIR_NAME, &dp->dp_mos_dir));
+
+	if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
+		/* create and open the free dir */
+		(void) dsl_dir_create_sync(dp, dp->dp_root_dir,
+		    FREE_DIR_NAME, tx);
+		VERIFY(0 == dsl_pool_open_special_dir(dp,
+		    FREE_DIR_NAME, &dp->dp_free_dir));
+
+		/* create and open the free_bplist */
+		obj = bpobj_alloc(dp->dp_meta_objset, SPA_MAXBLOCKSIZE, tx);
+		VERIFY(zap_add(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+		    DMU_POOL_FREE_BPOBJ, sizeof (uint64_t), 1, &obj, tx) == 0);
+		VERIFY3U(0, ==, bpobj_open(&dp->dp_free_bpobj,
+		    dp->dp_meta_objset, obj));
+	}
+
+	if (spa_version(spa) >= SPA_VERSION_DSL_SCRUB)
+		dsl_pool_create_origin(dp, tx);
+
+	/* create the root dataset */
+	obj = dsl_dataset_create_sync_dd(dp->dp_root_dir, NULL, 0, tx);
+
+	/* create the root objset */
+	VERIFY(0 == dsl_dataset_hold_obj(dp, obj, FTAG, &ds));
+	os = dmu_objset_create_impl(dp->dp_spa, ds,
+	    dsl_dataset_get_blkptr(ds), DMU_OST_ZFS, tx);
+#ifdef _KERNEL
+	zfs_create_fs(os, kcred, zplprops, tx);
+#endif
+	dsl_dataset_rele(ds, FTAG);
+
+	dmu_tx_commit(tx);
+
+	return (dp);
+}
+
+static int
+deadlist_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
+{
+	dsl_deadlist_t *dl = arg;
+	dsl_deadlist_insert(dl, bp, tx);
+	return (0);
+}
+
+void
+dsl_pool_sync(dsl_pool_t *dp, uint64_t txg)
+{
+	zio_t *zio;
+	dmu_tx_t *tx;
+	dsl_dir_t *dd;
+	dsl_dataset_t *ds;
+	dsl_sync_task_group_t *dstg;
+	objset_t *mos = dp->dp_meta_objset;
+	hrtime_t start, write_time;
+	uint64_t data_written;
+	int err;
+
+	/*
+	 * We need to copy dp_space_towrite() before doing
+	 * dsl_sync_task_group_sync(), because
+	 * dsl_dataset_snapshot_reserve_space() will increase
+	 * dp_space_towrite but not actually write anything.
+	 */
+	data_written = dp->dp_space_towrite[txg & TXG_MASK];
+
+	tx = dmu_tx_create_assigned(dp, txg);
+
+	dp->dp_read_overhead = 0;
+	start = gethrtime();
+
+	zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
+	while (ds = txg_list_remove(&dp->dp_dirty_datasets, txg)) {
+		/*
+		 * We must not sync any non-MOS datasets twice, because
+		 * we may have taken a snapshot of them.  However, we
+		 * may sync newly-created datasets on pass 2.
+		 */
+		ASSERT(!list_link_active(&ds->ds_synced_link));
+		list_insert_tail(&dp->dp_synced_datasets, ds);
+		dsl_dataset_sync(ds, zio, tx);
+	}
+	DTRACE_PROBE(pool_sync__1setup);
+	err = zio_wait(zio);
+
+	write_time = gethrtime() - start;
+	ASSERT(err == 0);
+	DTRACE_PROBE(pool_sync__2rootzio);
+
+	for (ds = list_head(&dp->dp_synced_datasets); ds;
+	    ds = list_next(&dp->dp_synced_datasets, ds))
+		dmu_objset_do_userquota_updates(ds->ds_objset, tx);
+
+	/*
+	 * Sync the datasets again to push out the changes due to
+	 * userspace updates.  This must be done before we process the
+	 * sync tasks, because that could cause a snapshot of a dataset
+	 * whose ds_bp will be rewritten when we do this 2nd sync.
+	 */
+	zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
+	while (ds = txg_list_remove(&dp->dp_dirty_datasets, txg)) {
+		ASSERT(list_link_active(&ds->ds_synced_link));
+		dmu_buf_rele(ds->ds_dbuf, ds);
+		dsl_dataset_sync(ds, zio, tx);
+	}
+	err = zio_wait(zio);
+
+	/*
+	 * Move dead blocks from the pending deadlist to the on-disk
+	 * deadlist.
+	 */
+	for (ds = list_head(&dp->dp_synced_datasets); ds;
+	    ds = list_next(&dp->dp_synced_datasets, ds)) {
+		bplist_iterate(&ds->ds_pending_deadlist,
+		    deadlist_enqueue_cb, &ds->ds_deadlist, tx);
+	}
+
+	while (dstg = txg_list_remove(&dp->dp_sync_tasks, txg)) {
+		/*
+		 * No more sync tasks should have been added while we
+		 * were syncing.
+		 */
+		ASSERT(spa_sync_pass(dp->dp_spa) == 1);
+		dsl_sync_task_group_sync(dstg, tx);
+	}
+	DTRACE_PROBE(pool_sync__3task);
+
+	start = gethrtime();
+	while (dd = txg_list_remove(&dp->dp_dirty_dirs, txg))
+		dsl_dir_sync(dd, tx);
+	write_time += gethrtime() - start;
+
+	start = gethrtime();
+	if (list_head(&mos->os_dirty_dnodes[txg & TXG_MASK]) != NULL ||
+	    list_head(&mos->os_free_dnodes[txg & TXG_MASK]) != NULL) {
+		zio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
+		dmu_objset_sync(mos, zio, tx);
+		err = zio_wait(zio);
+		ASSERT(err == 0);
+		dprintf_bp(&dp->dp_meta_rootbp, "meta objset rootbp is %s", "");
+		spa_set_rootblkptr(dp->dp_spa, &dp->dp_meta_rootbp);
+	}
+	write_time += gethrtime() - start;
+	DTRACE_PROBE2(pool_sync__4io, hrtime_t, write_time,
+	    hrtime_t, dp->dp_read_overhead);
+	write_time -= dp->dp_read_overhead;
+
+	dmu_tx_commit(tx);
+
+	dp->dp_space_towrite[txg & TXG_MASK] = 0;
+	ASSERT(dp->dp_tempreserved[txg & TXG_MASK] == 0);
+
+	/*
+	 * If the write limit max has not been explicitly set, set it
+	 * to a fraction of available physical memory (default 1/8th).
+	 * Note that we must inflate the limit because the spa
+	 * inflates write sizes to account for data replication.
+	 * Check this each sync phase to catch changing memory size.
+	 */
+	if (physmem != old_physmem && zfs_write_limit_shift) {
+		mutex_enter(&zfs_write_limit_lock);
+		old_physmem = physmem;
+		zfs_write_limit_max = ptob(physmem) >> zfs_write_limit_shift;
+		zfs_write_limit_inflated = MAX(zfs_write_limit_min,
+		    spa_get_asize(dp->dp_spa, zfs_write_limit_max));
+		mutex_exit(&zfs_write_limit_lock);
+	}
+
+	/*
+	 * Attempt to keep the sync time consistent by adjusting the
+	 * amount of write traffic allowed into each transaction group.
+	 * Weight the throughput calculation towards the current value:
+	 * 	thru = 3/4 old_thru + 1/4 new_thru
+	 *
+	 * Note: write_time is in nanosecs, so write_time/MICROSEC
+	 * yields millisecs
+	 */
+	ASSERT(zfs_write_limit_min > 0);
+	if (data_written > zfs_write_limit_min / 8 && write_time > MICROSEC) {
+		uint64_t throughput = data_written / (write_time / MICROSEC);
+
+		if (dp->dp_throughput)
+			dp->dp_throughput = throughput / 4 +
+			    3 * dp->dp_throughput / 4;
+		else
+			dp->dp_throughput = throughput;
+		dp->dp_write_limit = MIN(zfs_write_limit_inflated,
+		    MAX(zfs_write_limit_min,
+		    dp->dp_throughput * zfs_txg_synctime_ms));
+	}
+}
+
+void
+dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg)
+{
+	dsl_dataset_t *ds;
+	objset_t *os;
+
+	while (ds = list_head(&dp->dp_synced_datasets)) {
+		list_remove(&dp->dp_synced_datasets, ds);
+		os = ds->ds_objset;
+		zil_clean(os->os_zil, txg);
+		ASSERT(!dmu_objset_is_dirty(os, txg));
+		dmu_buf_rele(ds->ds_dbuf, ds);
+	}
+	ASSERT(!dmu_objset_is_dirty(dp->dp_meta_objset, txg));
+}
+
+/*
+ * TRUE if the current thread is the tx_sync_thread or if we
+ * are being called from SPA context during pool initialization.
+ */
+int
+dsl_pool_sync_context(dsl_pool_t *dp)
+{
+	return (curthread == dp->dp_tx.tx_sync_thread ||
+	    spa_get_dsl(dp->dp_spa) == NULL);
+}
+
+uint64_t
+dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree)
+{
+	uint64_t space, resv;
+
+	/*
+	 * Reserve about 1.6% (1/64), or at least 32MB, for allocation
+	 * efficiency.
+	 * XXX The intent log is not accounted for, so it must fit
+	 * within this slop.
+	 *
+	 * If we're trying to assess whether it's OK to do a free,
+	 * cut the reservation in half to allow forward progress
+	 * (e.g. make it possible to rm(1) files from a full pool).
+	 */
+	space = spa_get_dspace(dp->dp_spa);
+	resv = MAX(space >> 6, SPA_MINDEVSIZE >> 1);
+	if (netfree)
+		resv >>= 1;
+
+	return (space - resv);
+}
+
+int
+dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx)
+{
+	uint64_t reserved = 0;
+	uint64_t write_limit = (zfs_write_limit_override ?
+	    zfs_write_limit_override : dp->dp_write_limit);
+
+	if (zfs_no_write_throttle) {
+		atomic_add_64(&dp->dp_tempreserved[tx->tx_txg & TXG_MASK],
+		    space);
+		return (0);
+	}
+
+	/*
+	 * Check to see if we have exceeded the maximum allowed IO for
+	 * this transaction group.  We can do this without locks since
+	 * a little slop here is ok.  Note that we do the reserved check
+	 * with only half the requested reserve: this is because the
+	 * reserve requests are worst-case, and we really don't want to
+	 * throttle based off of worst-case estimates.
+	 */
+	if (write_limit > 0) {
+		reserved = dp->dp_space_towrite[tx->tx_txg & TXG_MASK]
+		    + dp->dp_tempreserved[tx->tx_txg & TXG_MASK] / 2;
+
+		if (reserved && reserved > write_limit)
+			return (ERESTART);
+	}
+
+	atomic_add_64(&dp->dp_tempreserved[tx->tx_txg & TXG_MASK], space);
+
+	/*
+	 * If this transaction group is over 7/8ths capacity, delay
+	 * the caller 1 clock tick.  This will slow down the "fill"
+	 * rate until the sync process can catch up with us.
+	 */
+	if (reserved && reserved > (write_limit - (write_limit >> 3)))
+		txg_delay(dp, tx->tx_txg, 1);
+
+	return (0);
+}
+
+void
+dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx)
+{
+	ASSERT(dp->dp_tempreserved[tx->tx_txg & TXG_MASK] >= space);
+	atomic_add_64(&dp->dp_tempreserved[tx->tx_txg & TXG_MASK], -space);
+}
+
+void
+dsl_pool_memory_pressure(dsl_pool_t *dp)
+{
+	uint64_t space_inuse = 0;
+	int i;
+
+	if (dp->dp_write_limit == zfs_write_limit_min)
+		return;
+
+	for (i = 0; i < TXG_SIZE; i++) {
+		space_inuse += dp->dp_space_towrite[i];
+		space_inuse += dp->dp_tempreserved[i];
+	}
+	dp->dp_write_limit = MAX(zfs_write_limit_min,
+	    MIN(dp->dp_write_limit, space_inuse / 4));
+}
+
+void
+dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx)
+{
+	if (space > 0) {
+		mutex_enter(&dp->dp_lock);
+		dp->dp_space_towrite[tx->tx_txg & TXG_MASK] += space;
+		mutex_exit(&dp->dp_lock);
+	}
+}
+
+/* ARGSUSED */
+static int
+upgrade_clones_cb(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)
+{
+	dmu_tx_t *tx = arg;
+	dsl_dataset_t *ds, *prev = NULL;
+	int err;
+	dsl_pool_t *dp = spa_get_dsl(spa);
+
+	err = dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds);
+	if (err)
+		return (err);
+
+	while (ds->ds_phys->ds_prev_snap_obj != 0) {
+		err = dsl_dataset_hold_obj(dp, ds->ds_phys->ds_prev_snap_obj,
+		    FTAG, &prev);
+		if (err) {
+			dsl_dataset_rele(ds, FTAG);
+			return (err);
+		}
+
+		if (prev->ds_phys->ds_next_snap_obj != ds->ds_object)
+			break;
+		dsl_dataset_rele(ds, FTAG);
+		ds = prev;
+		prev = NULL;
+	}
+
+	if (prev == NULL) {
+		prev = dp->dp_origin_snap;
+
+		/*
+		 * The $ORIGIN can't have any data, or the accounting
+		 * will be wrong.
+		 */
+		ASSERT(prev->ds_phys->ds_bp.blk_birth == 0);
+
+		/* The origin doesn't get attached to itself */
+		if (ds->ds_object == prev->ds_object) {
+			dsl_dataset_rele(ds, FTAG);
+			return (0);
+		}
+
+		dmu_buf_will_dirty(ds->ds_dbuf, tx);
+		ds->ds_phys->ds_prev_snap_obj = prev->ds_object;
+		ds->ds_phys->ds_prev_snap_txg = prev->ds_phys->ds_creation_txg;
+
+		dmu_buf_will_dirty(ds->ds_dir->dd_dbuf, tx);
+		ds->ds_dir->dd_phys->dd_origin_obj = prev->ds_object;
+
+		dmu_buf_will_dirty(prev->ds_dbuf, tx);
+		prev->ds_phys->ds_num_children++;
+
+		if (ds->ds_phys->ds_next_snap_obj == 0) {
+			ASSERT(ds->ds_prev == NULL);
+			VERIFY(0 == dsl_dataset_hold_obj(dp,
+			    ds->ds_phys->ds_prev_snap_obj, ds, &ds->ds_prev));
+		}
+	}
+
+	ASSERT(ds->ds_dir->dd_phys->dd_origin_obj == prev->ds_object);
+	ASSERT(ds->ds_phys->ds_prev_snap_obj == prev->ds_object);
+
+	if (prev->ds_phys->ds_next_clones_obj == 0) {
+		dmu_buf_will_dirty(prev->ds_dbuf, tx);
+		prev->ds_phys->ds_next_clones_obj =
+		    zap_create(dp->dp_meta_objset,
+		    DMU_OT_NEXT_CLONES, DMU_OT_NONE, 0, tx);
+	}
+	VERIFY(0 == zap_add_int(dp->dp_meta_objset,
+	    prev->ds_phys->ds_next_clones_obj, ds->ds_object, tx));
+
+	dsl_dataset_rele(ds, FTAG);
+	if (prev != dp->dp_origin_snap)
+		dsl_dataset_rele(prev, FTAG);
+	return (0);
+}
+
+void
+dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx)
+{
+	ASSERT(dmu_tx_is_syncing(tx));
+	ASSERT(dp->dp_origin_snap != NULL);
+
+	VERIFY3U(0, ==, dmu_objset_find_spa(dp->dp_spa, NULL, upgrade_clones_cb,
+	    tx, DS_FIND_CHILDREN));
+}
+
+/* ARGSUSED */
+static int
+upgrade_dir_clones_cb(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)
+{
+	dmu_tx_t *tx = arg;
+	dsl_dataset_t *ds;
+	dsl_pool_t *dp = spa_get_dsl(spa);
+	objset_t *mos = dp->dp_meta_objset;
+
+	VERIFY3U(0, ==, dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds));
+
+	if (ds->ds_dir->dd_phys->dd_origin_obj) {
+		dsl_dataset_t *origin;
+
+		VERIFY3U(0, ==, dsl_dataset_hold_obj(dp,
+		    ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &origin));
+
+		if (origin->ds_dir->dd_phys->dd_clones == 0) {
+			dmu_buf_will_dirty(origin->ds_dir->dd_dbuf, tx);
+			origin->ds_dir->dd_phys->dd_clones = zap_create(mos,
+			    DMU_OT_DSL_CLONES, DMU_OT_NONE, 0, tx);
+		}
+
+		VERIFY3U(0, ==, zap_add_int(dp->dp_meta_objset,
+		    origin->ds_dir->dd_phys->dd_clones, dsobj, tx));
+
+		dsl_dataset_rele(origin, FTAG);
+	}
+
+	dsl_dataset_rele(ds, FTAG);
+	return (0);
+}
+
+void
+dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx)
+{
+	ASSERT(dmu_tx_is_syncing(tx));
+	uint64_t obj;
+
+	(void) dsl_dir_create_sync(dp, dp->dp_root_dir, FREE_DIR_NAME, tx);
+	VERIFY(0 == dsl_pool_open_special_dir(dp,
+	    FREE_DIR_NAME, &dp->dp_free_dir));
+
+	/*
+	 * We can't use bpobj_alloc(), because spa_version() still
+	 * returns the old version, and we need a new-version bpobj with
+	 * subobj support.  So call dmu_object_alloc() directly.
+	 */
+	obj = dmu_object_alloc(dp->dp_meta_objset, DMU_OT_BPOBJ,
+	    SPA_MAXBLOCKSIZE, DMU_OT_BPOBJ_HDR, sizeof (bpobj_phys_t), tx);
+	VERIFY3U(0, ==, zap_add(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+	    DMU_POOL_FREE_BPOBJ, sizeof (uint64_t), 1, &obj, tx));
+	VERIFY3U(0, ==, bpobj_open(&dp->dp_free_bpobj,
+	    dp->dp_meta_objset, obj));
+
+	VERIFY3U(0, ==, dmu_objset_find_spa(dp->dp_spa, NULL,
+	    upgrade_dir_clones_cb, tx, DS_FIND_CHILDREN));
+}
+
+void
+dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx)
+{
+	uint64_t dsobj;
+	dsl_dataset_t *ds;
+
+	ASSERT(dmu_tx_is_syncing(tx));
+	ASSERT(dp->dp_origin_snap == NULL);
+
+	/* create the origin dir, ds, & snap-ds */
+	rw_enter(&dp->dp_config_rwlock, RW_WRITER);
+	dsobj = dsl_dataset_create_sync(dp->dp_root_dir, ORIGIN_DIR_NAME,
+	    NULL, 0, kcred, tx);
+	VERIFY(0 == dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds));
+	dsl_dataset_snapshot_sync(ds, ORIGIN_DIR_NAME, tx);
+	VERIFY(0 == dsl_dataset_hold_obj(dp, ds->ds_phys->ds_prev_snap_obj,
+	    dp, &dp->dp_origin_snap));
+	dsl_dataset_rele(ds, FTAG);
+	rw_exit(&dp->dp_config_rwlock);
+}
+
+taskq_t *
+dsl_pool_vnrele_taskq(dsl_pool_t *dp)
+{
+	return (dp->dp_vnrele_taskq);
+}
+
+/*
+ * Walk through the pool-wide zap object of temporary snapshot user holds
+ * and release them.
+ */
+void
+dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp)
+{
+	zap_attribute_t za;
+	zap_cursor_t zc;
+	objset_t *mos = dp->dp_meta_objset;
+	uint64_t zapobj = dp->dp_tmp_userrefs_obj;
+
+	if (zapobj == 0)
+		return;
+	ASSERT(spa_version(dp->dp_spa) >= SPA_VERSION_USERREFS);
+
+	for (zap_cursor_init(&zc, mos, zapobj);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    zap_cursor_advance(&zc)) {
+		char *htag;
+		uint64_t dsobj;
+
+		htag = strchr(za.za_name, '-');
+		*htag = '\0';
+		++htag;
+		dsobj = strtonum(za.za_name, NULL);
+		(void) dsl_dataset_user_release_tmp(dp, dsobj, htag, B_FALSE);
+	}
+	zap_cursor_fini(&zc);
+}
+
+/*
+ * Create the pool-wide zap object for storing temporary snapshot holds.
+ */
+void
+dsl_pool_user_hold_create_obj(dsl_pool_t *dp, dmu_tx_t *tx)
+{
+	objset_t *mos = dp->dp_meta_objset;
+
+	ASSERT(dp->dp_tmp_userrefs_obj == 0);
+	ASSERT(dmu_tx_is_syncing(tx));
+
+	dp->dp_tmp_userrefs_obj = zap_create(mos, DMU_OT_USERREFS,
+	    DMU_OT_NONE, 0, tx);
+
+	VERIFY(zap_add(mos, DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_TMP_USERREFS,
+	    sizeof (uint64_t), 1, &dp->dp_tmp_userrefs_obj, tx) == 0);
+}
+
+static int
+dsl_pool_user_hold_rele_impl(dsl_pool_t *dp, uint64_t dsobj,
+    const char *tag, uint64_t *now, dmu_tx_t *tx, boolean_t holding)
+{
+	objset_t *mos = dp->dp_meta_objset;
+	uint64_t zapobj = dp->dp_tmp_userrefs_obj;
+	char *name;
+	int error;
+
+	ASSERT(spa_version(dp->dp_spa) >= SPA_VERSION_USERREFS);
+	ASSERT(dmu_tx_is_syncing(tx));
+
+	/*
+	 * If the pool was created prior to SPA_VERSION_USERREFS, the
+	 * zap object for temporary holds might not exist yet.
+	 */
+	if (zapobj == 0) {
+		if (holding) {
+			dsl_pool_user_hold_create_obj(dp, tx);
+			zapobj = dp->dp_tmp_userrefs_obj;
+		} else {
+			return (ENOENT);
+		}
+	}
+
+	name = kmem_asprintf("%llx-%s", (u_longlong_t)dsobj, tag);
+	if (holding)
+		error = zap_add(mos, zapobj, name, 8, 1, now, tx);
+	else
+		error = zap_remove(mos, zapobj, name, tx);
+	strfree(name);
+
+	return (error);
+}
+
+/*
+ * Add a temporary hold for the given dataset object and tag.
+ */
+int
+dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj, const char *tag,
+    uint64_t *now, dmu_tx_t *tx)
+{
+	return (dsl_pool_user_hold_rele_impl(dp, dsobj, tag, now, tx, B_TRUE));
+}
+
+/*
+ * Release a temporary hold for the given dataset object and tag.
+ */
+int
+dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj, const char *tag,
+    dmu_tx_t *tx)
+{
+	return (dsl_pool_user_hold_rele_impl(dp, dsobj, tag, NULL,
+	    tx, B_FALSE));
+}
diff --git a/uts/common/fs/zfs/dsl_prop.c b/uts/common/fs/zfs/dsl_prop.c
new file mode 100644
index 000000000000..aa66b32e7938
--- /dev/null
+++ b/uts/common/fs/zfs/dsl_prop.c
@@ -0,0 +1,1153 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/dmu.h>
+#include <sys/dmu_objset.h>
+#include <sys/dmu_tx.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_synctask.h>
+#include <sys/spa.h>
+#include <sys/zap.h>
+#include <sys/fs/zfs.h>
+
+#include "zfs_prop.h"
+
+#define	ZPROP_INHERIT_SUFFIX "$inherit"
+#define	ZPROP_RECVD_SUFFIX "$recvd"
+
+static int
+dodefault(const char *propname, int intsz, int numints, void *buf)
+{
+	zfs_prop_t prop;
+
+	/*
+	 * The setonce properties are read-only, BUT they still
+	 * have a default value that can be used as the initial
+	 * value.
+	 */
+	if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL ||
+	    (zfs_prop_readonly(prop) && !zfs_prop_setonce(prop)))
+		return (ENOENT);
+
+	if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) {
+		if (intsz != 1)
+			return (EOVERFLOW);
+		(void) strncpy(buf, zfs_prop_default_string(prop),
+		    numints);
+	} else {
+		if (intsz != 8 || numints < 1)
+			return (EOVERFLOW);
+
+		*(uint64_t *)buf = zfs_prop_default_numeric(prop);
+	}
+
+	return (0);
+}
+
+int
+dsl_prop_get_dd(dsl_dir_t *dd, const char *propname,
+    int intsz, int numints, void *buf, char *setpoint, boolean_t snapshot)
+{
+	int err = ENOENT;
+	dsl_dir_t *target = dd;
+	objset_t *mos = dd->dd_pool->dp_meta_objset;
+	zfs_prop_t prop;
+	boolean_t inheritable;
+	boolean_t inheriting = B_FALSE;
+	char *inheritstr;
+	char *recvdstr;
+
+	ASSERT(RW_LOCK_HELD(&dd->dd_pool->dp_config_rwlock));
+
+	if (setpoint)
+		setpoint[0] = '\0';
+
+	prop = zfs_name_to_prop(propname);
+	inheritable = (prop == ZPROP_INVAL || zfs_prop_inheritable(prop));
+	inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
+	recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
+
+	/*
+	 * Note: dd may become NULL, therefore we shouldn't dereference it
+	 * after this loop.
+	 */
+	for (; dd != NULL; dd = dd->dd_parent) {
+		ASSERT(RW_LOCK_HELD(&dd->dd_pool->dp_config_rwlock));
+
+		if (dd != target || snapshot) {
+			if (!inheritable)
+				break;
+			inheriting = B_TRUE;
+		}
+
+		/* Check for a local value. */
+		err = zap_lookup(mos, dd->dd_phys->dd_props_zapobj, propname,
+		    intsz, numints, buf);
+		if (err != ENOENT) {
+			if (setpoint != NULL && err == 0)
+				dsl_dir_name(dd, setpoint);
+			break;
+		}
+
+		/*
+		 * Skip the check for a received value if there is an explicit
+		 * inheritance entry.
+		 */
+		err = zap_contains(mos, dd->dd_phys->dd_props_zapobj,
+		    inheritstr);
+		if (err != 0 && err != ENOENT)
+			break;
+
+		if (err == ENOENT) {
+			/* Check for a received value. */
+			err = zap_lookup(mos, dd->dd_phys->dd_props_zapobj,
+			    recvdstr, intsz, numints, buf);
+			if (err != ENOENT) {
+				if (setpoint != NULL && err == 0) {
+					if (inheriting) {
+						dsl_dir_name(dd, setpoint);
+					} else {
+						(void) strcpy(setpoint,
+						    ZPROP_SOURCE_VAL_RECVD);
+					}
+				}
+				break;
+			}
+		}
+
+		/*
+		 * If we found an explicit inheritance entry, err is zero even
+		 * though we haven't yet found the value, so reinitializing err
+		 * at the end of the loop (instead of at the beginning) ensures
+		 * that err has a valid post-loop value.
+		 */
+		err = ENOENT;
+	}
+
+	if (err == ENOENT)
+		err = dodefault(propname, intsz, numints, buf);
+
+	strfree(inheritstr);
+	strfree(recvdstr);
+
+	return (err);
+}
+
+int
+dsl_prop_get_ds(dsl_dataset_t *ds, const char *propname,
+    int intsz, int numints, void *buf, char *setpoint)
+{
+	zfs_prop_t prop = zfs_name_to_prop(propname);
+	boolean_t inheritable;
+	boolean_t snapshot;
+	uint64_t zapobj;
+
+	ASSERT(RW_LOCK_HELD(&ds->ds_dir->dd_pool->dp_config_rwlock));
+	inheritable = (prop == ZPROP_INVAL || zfs_prop_inheritable(prop));
+	snapshot = (ds->ds_phys != NULL && dsl_dataset_is_snapshot(ds));
+	zapobj = (ds->ds_phys == NULL ? 0 : ds->ds_phys->ds_props_obj);
+
+	if (zapobj != 0) {
+		objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
+		int err;
+
+		ASSERT(snapshot);
+
+		/* Check for a local value. */
+		err = zap_lookup(mos, zapobj, propname, intsz, numints, buf);
+		if (err != ENOENT) {
+			if (setpoint != NULL && err == 0)
+				dsl_dataset_name(ds, setpoint);
+			return (err);
+		}
+
+		/*
+		 * Skip the check for a received value if there is an explicit
+		 * inheritance entry.
+		 */
+		if (inheritable) {
+			char *inheritstr = kmem_asprintf("%s%s", propname,
+			    ZPROP_INHERIT_SUFFIX);
+			err = zap_contains(mos, zapobj, inheritstr);
+			strfree(inheritstr);
+			if (err != 0 && err != ENOENT)
+				return (err);
+		}
+
+		if (err == ENOENT) {
+			/* Check for a received value. */
+			char *recvdstr = kmem_asprintf("%s%s", propname,
+			    ZPROP_RECVD_SUFFIX);
+			err = zap_lookup(mos, zapobj, recvdstr,
+			    intsz, numints, buf);
+			strfree(recvdstr);
+			if (err != ENOENT) {
+				if (setpoint != NULL && err == 0)
+					(void) strcpy(setpoint,
+					    ZPROP_SOURCE_VAL_RECVD);
+				return (err);
+			}
+		}
+	}
+
+	return (dsl_prop_get_dd(ds->ds_dir, propname,
+	    intsz, numints, buf, setpoint, snapshot));
+}
+
+/*
+ * Register interest in the named property.  We'll call the callback
+ * once to notify it of the current property value, and again each time
+ * the property changes, until this callback is unregistered.
+ *
+ * Return 0 on success, errno if the prop is not an integer value.
+ */
+int
+dsl_prop_register(dsl_dataset_t *ds, const char *propname,
+    dsl_prop_changed_cb_t *callback, void *cbarg)
+{
+	dsl_dir_t *dd = ds->ds_dir;
+	dsl_pool_t *dp = dd->dd_pool;
+	uint64_t value;
+	dsl_prop_cb_record_t *cbr;
+	int err;
+	int need_rwlock;
+
+	need_rwlock = !RW_WRITE_HELD(&dp->dp_config_rwlock);
+	if (need_rwlock)
+		rw_enter(&dp->dp_config_rwlock, RW_READER);
+
+	err = dsl_prop_get_ds(ds, propname, 8, 1, &value, NULL);
+	if (err != 0) {
+		if (need_rwlock)
+			rw_exit(&dp->dp_config_rwlock);
+		return (err);
+	}
+
+	cbr = kmem_alloc(sizeof (dsl_prop_cb_record_t), KM_SLEEP);
+	cbr->cbr_ds = ds;
+	cbr->cbr_propname = kmem_alloc(strlen(propname)+1, KM_SLEEP);
+	(void) strcpy((char *)cbr->cbr_propname, propname);
+	cbr->cbr_func = callback;
+	cbr->cbr_arg = cbarg;
+	mutex_enter(&dd->dd_lock);
+	list_insert_head(&dd->dd_prop_cbs, cbr);
+	mutex_exit(&dd->dd_lock);
+
+	cbr->cbr_func(cbr->cbr_arg, value);
+
+	if (need_rwlock)
+		rw_exit(&dp->dp_config_rwlock);
+	return (0);
+}
+
+int
+dsl_prop_get(const char *dsname, const char *propname,
+    int intsz, int numints, void *buf, char *setpoint)
+{
+	dsl_dataset_t *ds;
+	int err;
+
+	err = dsl_dataset_hold(dsname, FTAG, &ds);
+	if (err)
+		return (err);
+
+	rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
+	err = dsl_prop_get_ds(ds, propname, intsz, numints, buf, setpoint);
+	rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
+
+	dsl_dataset_rele(ds, FTAG);
+	return (err);
+}
+
+/*
+ * Get the current property value.  It may have changed by the time this
+ * function returns, so it is NOT safe to follow up with
+ * dsl_prop_register() and assume that the value has not changed in
+ * between.
+ *
+ * Return 0 on success, ENOENT if ddname is invalid.
+ */
+int
+dsl_prop_get_integer(const char *ddname, const char *propname,
+    uint64_t *valuep, char *setpoint)
+{
+	return (dsl_prop_get(ddname, propname, 8, 1, valuep, setpoint));
+}
+
+void
+dsl_prop_setarg_init_uint64(dsl_prop_setarg_t *psa, const char *propname,
+    zprop_source_t source, uint64_t *value)
+{
+	psa->psa_name = propname;
+	psa->psa_source = source;
+	psa->psa_intsz = 8;
+	psa->psa_numints = 1;
+	psa->psa_value = value;
+
+	psa->psa_effective_value = -1ULL;
+}
+
+/*
+ * Predict the effective value of the given special property if it were set with
+ * the given value and source. This is not a general purpose function. It exists
+ * only to handle the special requirements of the quota and reservation
+ * properties. The fact that these properties are non-inheritable greatly
+ * simplifies the prediction logic.
+ *
+ * Returns 0 on success, a positive error code on failure, or -1 if called with
+ * a property not handled by this function.
+ */
+int
+dsl_prop_predict_sync(dsl_dir_t *dd, dsl_prop_setarg_t *psa)
+{
+	const char *propname = psa->psa_name;
+	zfs_prop_t prop = zfs_name_to_prop(propname);
+	zprop_source_t source = psa->psa_source;
+	objset_t *mos;
+	uint64_t zapobj;
+	uint64_t version;
+	char *recvdstr;
+	int err = 0;
+
+	switch (prop) {
+	case ZFS_PROP_QUOTA:
+	case ZFS_PROP_RESERVATION:
+	case ZFS_PROP_REFQUOTA:
+	case ZFS_PROP_REFRESERVATION:
+		break;
+	default:
+		return (-1);
+	}
+
+	mos = dd->dd_pool->dp_meta_objset;
+	zapobj = dd->dd_phys->dd_props_zapobj;
+	recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
+
+	version = spa_version(dd->dd_pool->dp_spa);
+	if (version < SPA_VERSION_RECVD_PROPS) {
+		if (source & ZPROP_SRC_NONE)
+			source = ZPROP_SRC_NONE;
+		else if (source & ZPROP_SRC_RECEIVED)
+			source = ZPROP_SRC_LOCAL;
+	}
+
+	switch (source) {
+	case ZPROP_SRC_NONE:
+		/* Revert to the received value, if any. */
+		err = zap_lookup(mos, zapobj, recvdstr, 8, 1,
+		    &psa->psa_effective_value);
+		if (err == ENOENT)
+			psa->psa_effective_value = 0;
+		break;
+	case ZPROP_SRC_LOCAL:
+		psa->psa_effective_value = *(uint64_t *)psa->psa_value;
+		break;
+	case ZPROP_SRC_RECEIVED:
+		/*
+		 * If there's no local setting, then the new received value will
+		 * be the effective value.
+		 */
+		err = zap_lookup(mos, zapobj, propname, 8, 1,
+		    &psa->psa_effective_value);
+		if (err == ENOENT)
+			psa->psa_effective_value = *(uint64_t *)psa->psa_value;
+		break;
+	case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
+		/*
+		 * We're clearing the received value, so the local setting (if
+		 * it exists) remains the effective value.
+		 */
+		err = zap_lookup(mos, zapobj, propname, 8, 1,
+		    &psa->psa_effective_value);
+		if (err == ENOENT)
+			psa->psa_effective_value = 0;
+		break;
+	default:
+		cmn_err(CE_PANIC, "unexpected property source: %d", source);
+	}
+
+	strfree(recvdstr);
+
+	if (err == ENOENT)
+		return (0);
+
+	return (err);
+}
+
+#ifdef	ZFS_DEBUG
+void
+dsl_prop_check_prediction(dsl_dir_t *dd, dsl_prop_setarg_t *psa)
+{
+	zfs_prop_t prop = zfs_name_to_prop(psa->psa_name);
+	uint64_t intval;
+	char setpoint[MAXNAMELEN];
+	uint64_t version = spa_version(dd->dd_pool->dp_spa);
+	int err;
+
+	if (version < SPA_VERSION_RECVD_PROPS) {
+		switch (prop) {
+		case ZFS_PROP_QUOTA:
+		case ZFS_PROP_RESERVATION:
+			return;
+		}
+	}
+
+	err = dsl_prop_get_dd(dd, psa->psa_name, 8, 1, &intval,
+	    setpoint, B_FALSE);
+	if (err == 0 && intval != psa->psa_effective_value) {
+		cmn_err(CE_PANIC, "%s property, source: %x, "
+		    "predicted effective value: %llu, "
+		    "actual effective value: %llu (setpoint: %s)",
+		    psa->psa_name, psa->psa_source,
+		    (unsigned long long)psa->psa_effective_value,
+		    (unsigned long long)intval, setpoint);
+	}
+}
+#endif
+
+/*
+ * Unregister this callback.  Return 0 on success, ENOENT if ddname is
+ * invalid, ENOMSG if no matching callback registered.
+ */
+int
+dsl_prop_unregister(dsl_dataset_t *ds, const char *propname,
+    dsl_prop_changed_cb_t *callback, void *cbarg)
+{
+	dsl_dir_t *dd = ds->ds_dir;
+	dsl_prop_cb_record_t *cbr;
+
+	mutex_enter(&dd->dd_lock);
+	for (cbr = list_head(&dd->dd_prop_cbs);
+	    cbr; cbr = list_next(&dd->dd_prop_cbs, cbr)) {
+		if (cbr->cbr_ds == ds &&
+		    cbr->cbr_func == callback &&
+		    cbr->cbr_arg == cbarg &&
+		    strcmp(cbr->cbr_propname, propname) == 0)
+			break;
+	}
+
+	if (cbr == NULL) {
+		mutex_exit(&dd->dd_lock);
+		return (ENOMSG);
+	}
+
+	list_remove(&dd->dd_prop_cbs, cbr);
+	mutex_exit(&dd->dd_lock);
+	kmem_free((void*)cbr->cbr_propname, strlen(cbr->cbr_propname)+1);
+	kmem_free(cbr, sizeof (dsl_prop_cb_record_t));
+
+	return (0);
+}
+
+/*
+ * Return the number of callbacks that are registered for this dataset.
+ */
+int
+dsl_prop_numcb(dsl_dataset_t *ds)
+{
+	dsl_dir_t *dd = ds->ds_dir;
+	dsl_prop_cb_record_t *cbr;
+	int num = 0;
+
+	mutex_enter(&dd->dd_lock);
+	for (cbr = list_head(&dd->dd_prop_cbs);
+	    cbr; cbr = list_next(&dd->dd_prop_cbs, cbr)) {
+		if (cbr->cbr_ds == ds)
+			num++;
+	}
+	mutex_exit(&dd->dd_lock);
+
+	return (num);
+}
+
+static void
+dsl_prop_changed_notify(dsl_pool_t *dp, uint64_t ddobj,
+    const char *propname, uint64_t value, int first)
+{
+	dsl_dir_t *dd;
+	dsl_prop_cb_record_t *cbr;
+	objset_t *mos = dp->dp_meta_objset;
+	zap_cursor_t zc;
+	zap_attribute_t *za;
+	int err;
+
+	ASSERT(RW_WRITE_HELD(&dp->dp_config_rwlock));
+	err = dsl_dir_open_obj(dp, ddobj, NULL, FTAG, &dd);
+	if (err)
+		return;
+
+	if (!first) {
+		/*
+		 * If the prop is set here, then this change is not
+		 * being inherited here or below; stop the recursion.
+		 */
+		err = zap_contains(mos, dd->dd_phys->dd_props_zapobj, propname);
+		if (err == 0) {
+			dsl_dir_close(dd, FTAG);
+			return;
+		}
+		ASSERT3U(err, ==, ENOENT);
+	}
+
+	mutex_enter(&dd->dd_lock);
+	for (cbr = list_head(&dd->dd_prop_cbs); cbr;
+	    cbr = list_next(&dd->dd_prop_cbs, cbr)) {
+		uint64_t propobj = cbr->cbr_ds->ds_phys->ds_props_obj;
+
+		if (strcmp(cbr->cbr_propname, propname) != 0)
+			continue;
+
+		/*
+		 * If the property is set on this ds, then it is not
+		 * inherited here; don't call the callback.
+		 */
+		if (propobj && 0 == zap_contains(mos, propobj, propname))
+			continue;
+
+		cbr->cbr_func(cbr->cbr_arg, value);
+	}
+	mutex_exit(&dd->dd_lock);
+
+	za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
+	for (zap_cursor_init(&zc, mos,
+	    dd->dd_phys->dd_child_dir_zapobj);
+	    zap_cursor_retrieve(&zc, za) == 0;
+	    zap_cursor_advance(&zc)) {
+		dsl_prop_changed_notify(dp, za->za_first_integer,
+		    propname, value, FALSE);
+	}
+	kmem_free(za, sizeof (zap_attribute_t));
+	zap_cursor_fini(&zc);
+	dsl_dir_close(dd, FTAG);
+}
+
+void
+dsl_prop_set_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_prop_setarg_t *psa = arg2;
+	objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset;
+	uint64_t zapobj, intval, dummy;
+	int isint;
+	char valbuf[32];
+	char *valstr = NULL;
+	char *inheritstr;
+	char *recvdstr;
+	char *tbuf = NULL;
+	int err;
+	uint64_t version = spa_version(ds->ds_dir->dd_pool->dp_spa);
+	const char *propname = psa->psa_name;
+	zprop_source_t source = psa->psa_source;
+
+	isint = (dodefault(propname, 8, 1, &intval) == 0);
+
+	if (ds->ds_phys != NULL && dsl_dataset_is_snapshot(ds)) {
+		ASSERT(version >= SPA_VERSION_SNAP_PROPS);
+		if (ds->ds_phys->ds_props_obj == 0) {
+			dmu_buf_will_dirty(ds->ds_dbuf, tx);
+			ds->ds_phys->ds_props_obj =
+			    zap_create(mos,
+			    DMU_OT_DSL_PROPS, DMU_OT_NONE, 0, tx);
+		}
+		zapobj = ds->ds_phys->ds_props_obj;
+	} else {
+		zapobj = ds->ds_dir->dd_phys->dd_props_zapobj;
+	}
+
+	if (version < SPA_VERSION_RECVD_PROPS) {
+		zfs_prop_t prop = zfs_name_to_prop(propname);
+		if (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_RESERVATION)
+			return;
+
+		if (source & ZPROP_SRC_NONE)
+			source = ZPROP_SRC_NONE;
+		else if (source & ZPROP_SRC_RECEIVED)
+			source = ZPROP_SRC_LOCAL;
+	}
+
+	inheritstr = kmem_asprintf("%s%s", propname, ZPROP_INHERIT_SUFFIX);
+	recvdstr = kmem_asprintf("%s%s", propname, ZPROP_RECVD_SUFFIX);
+
+	switch (source) {
+	case ZPROP_SRC_NONE:
+		/*
+		 * revert to received value, if any (inherit -S)
+		 * - remove propname
+		 * - remove propname$inherit
+		 */
+		err = zap_remove(mos, zapobj, propname, tx);
+		ASSERT(err == 0 || err == ENOENT);
+		err = zap_remove(mos, zapobj, inheritstr, tx);
+		ASSERT(err == 0 || err == ENOENT);
+		break;
+	case ZPROP_SRC_LOCAL:
+		/*
+		 * remove propname$inherit
+		 * set propname -> value
+		 */
+		err = zap_remove(mos, zapobj, inheritstr, tx);
+		ASSERT(err == 0 || err == ENOENT);
+		VERIFY(0 == zap_update(mos, zapobj, propname,
+		    psa->psa_intsz, psa->psa_numints, psa->psa_value, tx));
+		break;
+	case ZPROP_SRC_INHERITED:
+		/*
+		 * explicitly inherit
+		 * - remove propname
+		 * - set propname$inherit
+		 */
+		err = zap_remove(mos, zapobj, propname, tx);
+		ASSERT(err == 0 || err == ENOENT);
+		if (version >= SPA_VERSION_RECVD_PROPS &&
+		    dsl_prop_get_ds(ds, ZPROP_HAS_RECVD, 8, 1, &dummy,
+		    NULL) == 0) {
+			dummy = 0;
+			err = zap_update(mos, zapobj, inheritstr,
+			    8, 1, &dummy, tx);
+			ASSERT(err == 0);
+		}
+		break;
+	case ZPROP_SRC_RECEIVED:
+		/*
+		 * set propname$recvd -> value
+		 */
+		err = zap_update(mos, zapobj, recvdstr,
+		    psa->psa_intsz, psa->psa_numints, psa->psa_value, tx);
+		ASSERT(err == 0);
+		break;
+	case (ZPROP_SRC_NONE | ZPROP_SRC_LOCAL | ZPROP_SRC_RECEIVED):
+		/*
+		 * clear local and received settings
+		 * - remove propname
+		 * - remove propname$inherit
+		 * - remove propname$recvd
+		 */
+		err = zap_remove(mos, zapobj, propname, tx);
+		ASSERT(err == 0 || err == ENOENT);
+		err = zap_remove(mos, zapobj, inheritstr, tx);
+		ASSERT(err == 0 || err == ENOENT);
+		/* FALLTHRU */
+	case (ZPROP_SRC_NONE | ZPROP_SRC_RECEIVED):
+		/*
+		 * remove propname$recvd
+		 */
+		err = zap_remove(mos, zapobj, recvdstr, tx);
+		ASSERT(err == 0 || err == ENOENT);
+		break;
+	default:
+		cmn_err(CE_PANIC, "unexpected property source: %d", source);
+	}
+
+	strfree(inheritstr);
+	strfree(recvdstr);
+
+	if (isint) {
+		VERIFY(0 == dsl_prop_get_ds(ds, propname, 8, 1, &intval, NULL));
+
+		if (ds->ds_phys != NULL && dsl_dataset_is_snapshot(ds)) {
+			dsl_prop_cb_record_t *cbr;
+			/*
+			 * It's a snapshot; nothing can inherit this
+			 * property, so just look for callbacks on this
+			 * ds here.
+			 */
+			mutex_enter(&ds->ds_dir->dd_lock);
+			for (cbr = list_head(&ds->ds_dir->dd_prop_cbs); cbr;
+			    cbr = list_next(&ds->ds_dir->dd_prop_cbs, cbr)) {
+				if (cbr->cbr_ds == ds &&
+				    strcmp(cbr->cbr_propname, propname) == 0)
+					cbr->cbr_func(cbr->cbr_arg, intval);
+			}
+			mutex_exit(&ds->ds_dir->dd_lock);
+		} else {
+			dsl_prop_changed_notify(ds->ds_dir->dd_pool,
+			    ds->ds_dir->dd_object, propname, intval, TRUE);
+		}
+
+		(void) snprintf(valbuf, sizeof (valbuf),
+		    "%lld", (longlong_t)intval);
+		valstr = valbuf;
+	} else {
+		if (source == ZPROP_SRC_LOCAL) {
+			valstr = (char *)psa->psa_value;
+		} else {
+			tbuf = kmem_alloc(ZAP_MAXVALUELEN, KM_SLEEP);
+			if (dsl_prop_get_ds(ds, propname, 1,
+			    ZAP_MAXVALUELEN, tbuf, NULL) == 0)
+				valstr = tbuf;
+		}
+	}
+
+	spa_history_log_internal((source == ZPROP_SRC_NONE ||
+	    source == ZPROP_SRC_INHERITED) ? LOG_DS_INHERIT :
+	    LOG_DS_PROPSET, ds->ds_dir->dd_pool->dp_spa, tx,
+	    "%s=%s dataset = %llu", propname,
+	    (valstr == NULL ? "" : valstr), ds->ds_object);
+
+	if (tbuf != NULL)
+		kmem_free(tbuf, ZAP_MAXVALUELEN);
+}
+
+void
+dsl_props_set_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_dataset_t *ds = arg1;
+	dsl_props_arg_t *pa = arg2;
+	nvlist_t *props = pa->pa_props;
+	dsl_prop_setarg_t psa;
+	nvpair_t *elem = NULL;
+
+	psa.psa_source = pa->pa_source;
+
+	while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
+		nvpair_t *pair = elem;
+
+		psa.psa_name = nvpair_name(pair);
+
+		if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
+			/*
+			 * dsl_prop_get_all_impl() returns properties in this
+			 * format.
+			 */
+			nvlist_t *attrs;
+			VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
+			VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+			    &pair) == 0);
+		}
+
+		if (nvpair_type(pair) == DATA_TYPE_STRING) {
+			VERIFY(nvpair_value_string(pair,
+			    (char **)&psa.psa_value) == 0);
+			psa.psa_intsz = 1;
+			psa.psa_numints = strlen(psa.psa_value) + 1;
+		} else {
+			uint64_t intval;
+			VERIFY(nvpair_value_uint64(pair, &intval) == 0);
+			psa.psa_intsz = sizeof (intval);
+			psa.psa_numints = 1;
+			psa.psa_value = &intval;
+		}
+		dsl_prop_set_sync(ds, &psa, tx);
+	}
+}
+
+void
+dsl_dir_prop_set_uint64_sync(dsl_dir_t *dd, const char *name, uint64_t val,
+    dmu_tx_t *tx)
+{
+	objset_t *mos = dd->dd_pool->dp_meta_objset;
+	uint64_t zapobj = dd->dd_phys->dd_props_zapobj;
+
+	ASSERT(dmu_tx_is_syncing(tx));
+
+	VERIFY(0 == zap_update(mos, zapobj, name, sizeof (val), 1, &val, tx));
+
+	dsl_prop_changed_notify(dd->dd_pool, dd->dd_object, name, val, TRUE);
+
+	spa_history_log_internal(LOG_DS_PROPSET, dd->dd_pool->dp_spa, tx,
+	    "%s=%llu dataset = %llu", name, (u_longlong_t)val,
+	    dd->dd_phys->dd_head_dataset_obj);
+}
+
+int
+dsl_prop_set(const char *dsname, const char *propname, zprop_source_t source,
+    int intsz, int numints, const void *buf)
+{
+	dsl_dataset_t *ds;
+	uint64_t version;
+	int err;
+	dsl_prop_setarg_t psa;
+
+	/*
+	 * We must do these checks before we get to the syncfunc, since
+	 * it can't fail.
+	 */
+	if (strlen(propname) >= ZAP_MAXNAMELEN)
+		return (ENAMETOOLONG);
+
+	err = dsl_dataset_hold(dsname, FTAG, &ds);
+	if (err)
+		return (err);
+
+	version = spa_version(ds->ds_dir->dd_pool->dp_spa);
+	if (intsz * numints >= (version < SPA_VERSION_STMF_PROP ?
+	    ZAP_OLDMAXVALUELEN : ZAP_MAXVALUELEN)) {
+		dsl_dataset_rele(ds, FTAG);
+		return (E2BIG);
+	}
+	if (dsl_dataset_is_snapshot(ds) &&
+	    version < SPA_VERSION_SNAP_PROPS) {
+		dsl_dataset_rele(ds, FTAG);
+		return (ENOTSUP);
+	}
+
+	psa.psa_name = propname;
+	psa.psa_source = source;
+	psa.psa_intsz = intsz;
+	psa.psa_numints = numints;
+	psa.psa_value = buf;
+	psa.psa_effective_value = -1ULL;
+
+	err = dsl_sync_task_do(ds->ds_dir->dd_pool,
+	    NULL, dsl_prop_set_sync, ds, &psa, 2);
+
+	dsl_dataset_rele(ds, FTAG);
+	return (err);
+}
+
+int
+dsl_props_set(const char *dsname, zprop_source_t source, nvlist_t *props)
+{
+	dsl_dataset_t *ds;
+	uint64_t version;
+	nvpair_t *elem = NULL;
+	dsl_props_arg_t pa;
+	int err;
+
+	if (err = dsl_dataset_hold(dsname, FTAG, &ds))
+		return (err);
+	/*
+	 * Do these checks before the syncfunc, since it can't fail.
+	 */
+	version = spa_version(ds->ds_dir->dd_pool->dp_spa);
+	while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
+		if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
+			dsl_dataset_rele(ds, FTAG);
+			return (ENAMETOOLONG);
+		}
+		if (nvpair_type(elem) == DATA_TYPE_STRING) {
+			char *valstr;
+			VERIFY(nvpair_value_string(elem, &valstr) == 0);
+			if (strlen(valstr) >= (version <
+			    SPA_VERSION_STMF_PROP ?
+			    ZAP_OLDMAXVALUELEN : ZAP_MAXVALUELEN)) {
+				dsl_dataset_rele(ds, FTAG);
+				return (E2BIG);
+			}
+		}
+	}
+
+	if (dsl_dataset_is_snapshot(ds) &&
+	    version < SPA_VERSION_SNAP_PROPS) {
+		dsl_dataset_rele(ds, FTAG);
+		return (ENOTSUP);
+	}
+
+	pa.pa_props = props;
+	pa.pa_source = source;
+
+	err = dsl_sync_task_do(ds->ds_dir->dd_pool,
+	    NULL, dsl_props_set_sync, ds, &pa, 2);
+
+	dsl_dataset_rele(ds, FTAG);
+	return (err);
+}
+
+typedef enum dsl_prop_getflags {
+	DSL_PROP_GET_INHERITING = 0x1,	/* searching parent of target ds */
+	DSL_PROP_GET_SNAPSHOT = 0x2,	/* snapshot dataset */
+	DSL_PROP_GET_LOCAL = 0x4,	/* local properties */
+	DSL_PROP_GET_RECEIVED = 0x8	/* received properties */
+} dsl_prop_getflags_t;
+
+static int
+dsl_prop_get_all_impl(objset_t *mos, uint64_t propobj,
+    const char *setpoint, dsl_prop_getflags_t flags, nvlist_t *nv)
+{
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	int err = 0;
+
+	for (zap_cursor_init(&zc, mos, propobj);
+	    (err = zap_cursor_retrieve(&zc, &za)) == 0;
+	    zap_cursor_advance(&zc)) {
+		nvlist_t *propval;
+		zfs_prop_t prop;
+		char buf[ZAP_MAXNAMELEN];
+		char *valstr;
+		const char *suffix;
+		const char *propname;
+		const char *source;
+
+		suffix = strchr(za.za_name, '$');
+
+		if (suffix == NULL) {
+			/*
+			 * Skip local properties if we only want received
+			 * properties.
+			 */
+			if (flags & DSL_PROP_GET_RECEIVED)
+				continue;
+
+			propname = za.za_name;
+			source = setpoint;
+		} else if (strcmp(suffix, ZPROP_INHERIT_SUFFIX) == 0) {
+			/* Skip explicitly inherited entries. */
+			continue;
+		} else if (strcmp(suffix, ZPROP_RECVD_SUFFIX) == 0) {
+			if (flags & DSL_PROP_GET_LOCAL)
+				continue;
+
+			(void) strncpy(buf, za.za_name, (suffix - za.za_name));
+			buf[suffix - za.za_name] = '\0';
+			propname = buf;
+
+			if (!(flags & DSL_PROP_GET_RECEIVED)) {
+				/* Skip if locally overridden. */
+				err = zap_contains(mos, propobj, propname);
+				if (err == 0)
+					continue;
+				if (err != ENOENT)
+					break;
+
+				/* Skip if explicitly inherited. */
+				valstr = kmem_asprintf("%s%s", propname,
+				    ZPROP_INHERIT_SUFFIX);
+				err = zap_contains(mos, propobj, valstr);
+				strfree(valstr);
+				if (err == 0)
+					continue;
+				if (err != ENOENT)
+					break;
+			}
+
+			source = ((flags & DSL_PROP_GET_INHERITING) ?
+			    setpoint : ZPROP_SOURCE_VAL_RECVD);
+		} else {
+			/*
+			 * For backward compatibility, skip suffixes we don't
+			 * recognize.
+			 */
+			continue;
+		}
+
+		prop = zfs_name_to_prop(propname);
+
+		/* Skip non-inheritable properties. */
+		if ((flags & DSL_PROP_GET_INHERITING) && prop != ZPROP_INVAL &&
+		    !zfs_prop_inheritable(prop))
+			continue;
+
+		/* Skip properties not valid for this type. */
+		if ((flags & DSL_PROP_GET_SNAPSHOT) && prop != ZPROP_INVAL &&
+		    !zfs_prop_valid_for_type(prop, ZFS_TYPE_SNAPSHOT))
+			continue;
+
+		/* Skip properties already defined. */
+		if (nvlist_exists(nv, propname))
+			continue;
+
+		VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		if (za.za_integer_length == 1) {
+			/*
+			 * String property
+			 */
+			char *tmp = kmem_alloc(za.za_num_integers,
+			    KM_SLEEP);
+			err = zap_lookup(mos, propobj,
+			    za.za_name, 1, za.za_num_integers, tmp);
+			if (err != 0) {
+				kmem_free(tmp, za.za_num_integers);
+				break;
+			}
+			VERIFY(nvlist_add_string(propval, ZPROP_VALUE,
+			    tmp) == 0);
+			kmem_free(tmp, za.za_num_integers);
+		} else {
+			/*
+			 * Integer property
+			 */
+			ASSERT(za.za_integer_length == 8);
+			(void) nvlist_add_uint64(propval, ZPROP_VALUE,
+			    za.za_first_integer);
+		}
+
+		VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, source) == 0);
+		VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
+		nvlist_free(propval);
+	}
+	zap_cursor_fini(&zc);
+	if (err == ENOENT)
+		err = 0;
+	return (err);
+}
+
+/*
+ * Iterate over all properties for this dataset and return them in an nvlist.
+ */
+static int
+dsl_prop_get_all_ds(dsl_dataset_t *ds, nvlist_t **nvp,
+    dsl_prop_getflags_t flags)
+{
+	dsl_dir_t *dd = ds->ds_dir;
+	dsl_pool_t *dp = dd->dd_pool;
+	objset_t *mos = dp->dp_meta_objset;
+	int err = 0;
+	char setpoint[MAXNAMELEN];
+
+	VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	if (dsl_dataset_is_snapshot(ds))
+		flags |= DSL_PROP_GET_SNAPSHOT;
+
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+
+	if (ds->ds_phys->ds_props_obj != 0) {
+		ASSERT(flags & DSL_PROP_GET_SNAPSHOT);
+		dsl_dataset_name(ds, setpoint);
+		err = dsl_prop_get_all_impl(mos, ds->ds_phys->ds_props_obj,
+		    setpoint, flags, *nvp);
+		if (err)
+			goto out;
+	}
+
+	for (; dd != NULL; dd = dd->dd_parent) {
+		if (dd != ds->ds_dir || (flags & DSL_PROP_GET_SNAPSHOT)) {
+			if (flags & (DSL_PROP_GET_LOCAL |
+			    DSL_PROP_GET_RECEIVED))
+				break;
+			flags |= DSL_PROP_GET_INHERITING;
+		}
+		dsl_dir_name(dd, setpoint);
+		err = dsl_prop_get_all_impl(mos, dd->dd_phys->dd_props_zapobj,
+		    setpoint, flags, *nvp);
+		if (err)
+			break;
+	}
+out:
+	rw_exit(&dp->dp_config_rwlock);
+	return (err);
+}
+
+boolean_t
+dsl_prop_get_hasrecvd(objset_t *os)
+{
+	dsl_dataset_t *ds = os->os_dsl_dataset;
+	int rc;
+	uint64_t dummy;
+
+	rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
+	rc = dsl_prop_get_ds(ds, ZPROP_HAS_RECVD, 8, 1, &dummy, NULL);
+	rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
+	ASSERT(rc != 0 || spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS);
+	return (rc == 0);
+}
+
+static void
+dsl_prop_set_hasrecvd_impl(objset_t *os, zprop_source_t source)
+{
+	dsl_dataset_t *ds = os->os_dsl_dataset;
+	uint64_t dummy = 0;
+	dsl_prop_setarg_t psa;
+
+	if (spa_version(os->os_spa) < SPA_VERSION_RECVD_PROPS)
+		return;
+
+	dsl_prop_setarg_init_uint64(&psa, ZPROP_HAS_RECVD, source, &dummy);
+
+	(void) dsl_sync_task_do(ds->ds_dir->dd_pool, NULL,
+	    dsl_prop_set_sync, ds, &psa, 2);
+}
+
+/*
+ * Call after successfully receiving properties to ensure that only the first
+ * receive on or after SPA_VERSION_RECVD_PROPS blows away local properties.
+ */
+void
+dsl_prop_set_hasrecvd(objset_t *os)
+{
+	if (dsl_prop_get_hasrecvd(os)) {
+		ASSERT(spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS);
+		return;
+	}
+	dsl_prop_set_hasrecvd_impl(os, ZPROP_SRC_LOCAL);
+}
+
+void
+dsl_prop_unset_hasrecvd(objset_t *os)
+{
+	dsl_prop_set_hasrecvd_impl(os, ZPROP_SRC_NONE);
+}
+
+int
+dsl_prop_get_all(objset_t *os, nvlist_t **nvp)
+{
+	return (dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, 0));
+}
+
+int
+dsl_prop_get_received(objset_t *os, nvlist_t **nvp)
+{
+	/*
+	 * Received properties are not distinguishable from local properties
+	 * until the dataset has received properties on or after
+	 * SPA_VERSION_RECVD_PROPS.
+	 */
+	dsl_prop_getflags_t flags = (dsl_prop_get_hasrecvd(os) ?
+	    DSL_PROP_GET_RECEIVED : DSL_PROP_GET_LOCAL);
+	return (dsl_prop_get_all_ds(os->os_dsl_dataset, nvp, flags));
+}
+
+void
+dsl_prop_nvlist_add_uint64(nvlist_t *nv, zfs_prop_t prop, uint64_t value)
+{
+	nvlist_t *propval;
+	const char *propname = zfs_prop_to_name(prop);
+	uint64_t default_value;
+
+	if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
+		VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0);
+		return;
+	}
+
+	VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, value) == 0);
+	/* Indicate the default source if we can. */
+	if (dodefault(propname, 8, 1, &default_value) == 0 &&
+	    value == default_value) {
+		VERIFY(nvlist_add_string(propval, ZPROP_SOURCE, "") == 0);
+	}
+	VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
+	nvlist_free(propval);
+}
+
+void
+dsl_prop_nvlist_add_string(nvlist_t *nv, zfs_prop_t prop, const char *value)
+{
+	nvlist_t *propval;
+	const char *propname = zfs_prop_to_name(prop);
+
+	if (nvlist_lookup_nvlist(nv, propname, &propval) == 0) {
+		VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0);
+		return;
+	}
+
+	VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	VERIFY(nvlist_add_string(propval, ZPROP_VALUE, value) == 0);
+	VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
+	nvlist_free(propval);
+}
diff --git a/uts/common/fs/zfs/dsl_scan.c b/uts/common/fs/zfs/dsl_scan.c
new file mode 100644
index 000000000000..56d41083673e
--- /dev/null
+++ b/uts/common/fs/zfs/dsl_scan.c
@@ -0,0 +1,1766 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/dsl_scan.h>
+#include <sys/dsl_pool.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_synctask.h>
+#include <sys/dnode.h>
+#include <sys/dmu_tx.h>
+#include <sys/dmu_objset.h>
+#include <sys/arc.h>
+#include <sys/zap.h>
+#include <sys/zio.h>
+#include <sys/zfs_context.h>
+#include <sys/fs/zfs.h>
+#include <sys/zfs_znode.h>
+#include <sys/spa_impl.h>
+#include <sys/vdev_impl.h>
+#include <sys/zil_impl.h>
+#include <sys/zio_checksum.h>
+#include <sys/ddt.h>
+#include <sys/sa.h>
+#include <sys/sa_impl.h>
+#ifdef _KERNEL
+#include <sys/zfs_vfsops.h>
+#endif
+
+typedef int (scan_cb_t)(dsl_pool_t *, const blkptr_t *, const zbookmark_t *);
+
+static scan_cb_t dsl_scan_defrag_cb;
+static scan_cb_t dsl_scan_scrub_cb;
+static scan_cb_t dsl_scan_remove_cb;
+static dsl_syncfunc_t dsl_scan_cancel_sync;
+static void dsl_scan_sync_state(dsl_scan_t *, dmu_tx_t *tx);
+
+int zfs_top_maxinflight = 32;		/* maximum I/Os per top-level */
+int zfs_resilver_delay = 2;		/* number of ticks to delay resilver */
+int zfs_scrub_delay = 4;		/* number of ticks to delay scrub */
+int zfs_scan_idle = 50;			/* idle window in clock ticks */
+
+int zfs_scan_min_time_ms = 1000; /* min millisecs to scrub per txg */
+int zfs_free_min_time_ms = 1000; /* min millisecs to free per txg */
+int zfs_resilver_min_time_ms = 3000; /* min millisecs to resilver per txg */
+boolean_t zfs_no_scrub_io = B_FALSE; /* set to disable scrub i/o */
+boolean_t zfs_no_scrub_prefetch = B_FALSE; /* set to disable srub prefetching */
+enum ddt_class zfs_scrub_ddt_class_max = DDT_CLASS_DUPLICATE;
+int dsl_scan_delay_completion = B_FALSE; /* set to delay scan completion */
+
+#define	DSL_SCAN_IS_SCRUB_RESILVER(scn) \
+	((scn)->scn_phys.scn_func == POOL_SCAN_SCRUB || \
+	(scn)->scn_phys.scn_func == POOL_SCAN_RESILVER)
+
+extern int zfs_txg_timeout;
+
+/* the order has to match pool_scan_type */
+static scan_cb_t *scan_funcs[POOL_SCAN_FUNCS] = {
+	NULL,
+	dsl_scan_scrub_cb,	/* POOL_SCAN_SCRUB */
+	dsl_scan_scrub_cb,	/* POOL_SCAN_RESILVER */
+};
+
+int
+dsl_scan_init(dsl_pool_t *dp, uint64_t txg)
+{
+	int err;
+	dsl_scan_t *scn;
+	spa_t *spa = dp->dp_spa;
+	uint64_t f;
+
+	scn = dp->dp_scan = kmem_zalloc(sizeof (dsl_scan_t), KM_SLEEP);
+	scn->scn_dp = dp;
+
+	err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+	    "scrub_func", sizeof (uint64_t), 1, &f);
+	if (err == 0) {
+		/*
+		 * There was an old-style scrub in progress.  Restart a
+		 * new-style scrub from the beginning.
+		 */
+		scn->scn_restart_txg = txg;
+		zfs_dbgmsg("old-style scrub was in progress; "
+		    "restarting new-style scrub in txg %llu",
+		    scn->scn_restart_txg);
+
+		/*
+		 * Load the queue obj from the old location so that it
+		 * can be freed by dsl_scan_done().
+		 */
+		(void) zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+		    "scrub_queue", sizeof (uint64_t), 1,
+		    &scn->scn_phys.scn_queue_obj);
+	} else {
+		err = zap_lookup(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+		    DMU_POOL_SCAN, sizeof (uint64_t), SCAN_PHYS_NUMINTS,
+		    &scn->scn_phys);
+		if (err == ENOENT)
+			return (0);
+		else if (err)
+			return (err);
+
+		if (scn->scn_phys.scn_state == DSS_SCANNING &&
+		    spa_prev_software_version(dp->dp_spa) < SPA_VERSION_SCAN) {
+			/*
+			 * A new-type scrub was in progress on an old
+			 * pool, and the pool was accessed by old
+			 * software.  Restart from the beginning, since
+			 * the old software may have changed the pool in
+			 * the meantime.
+			 */
+			scn->scn_restart_txg = txg;
+			zfs_dbgmsg("new-style scrub was modified "
+			    "by old software; restarting in txg %llu",
+			    scn->scn_restart_txg);
+		}
+	}
+
+	spa_scan_stat_init(spa);
+	return (0);
+}
+
+void
+dsl_scan_fini(dsl_pool_t *dp)
+{
+	if (dp->dp_scan) {
+		kmem_free(dp->dp_scan, sizeof (dsl_scan_t));
+		dp->dp_scan = NULL;
+	}
+}
+
+/* ARGSUSED */
+static int
+dsl_scan_setup_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_scan_t *scn = arg1;
+
+	if (scn->scn_phys.scn_state == DSS_SCANNING)
+		return (EBUSY);
+
+	return (0);
+}
+
+/* ARGSUSED */
+static void
+dsl_scan_setup_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_scan_t *scn = arg1;
+	pool_scan_func_t *funcp = arg2;
+	dmu_object_type_t ot = 0;
+	dsl_pool_t *dp = scn->scn_dp;
+	spa_t *spa = dp->dp_spa;
+
+	ASSERT(scn->scn_phys.scn_state != DSS_SCANNING);
+	ASSERT(*funcp > POOL_SCAN_NONE && *funcp < POOL_SCAN_FUNCS);
+	bzero(&scn->scn_phys, sizeof (scn->scn_phys));
+	scn->scn_phys.scn_func = *funcp;
+	scn->scn_phys.scn_state = DSS_SCANNING;
+	scn->scn_phys.scn_min_txg = 0;
+	scn->scn_phys.scn_max_txg = tx->tx_txg;
+	scn->scn_phys.scn_ddt_class_max = DDT_CLASSES - 1; /* the entire DDT */
+	scn->scn_phys.scn_start_time = gethrestime_sec();
+	scn->scn_phys.scn_errors = 0;
+	scn->scn_phys.scn_to_examine = spa->spa_root_vdev->vdev_stat.vs_alloc;
+	scn->scn_restart_txg = 0;
+	spa_scan_stat_init(spa);
+
+	if (DSL_SCAN_IS_SCRUB_RESILVER(scn)) {
+		scn->scn_phys.scn_ddt_class_max = zfs_scrub_ddt_class_max;
+
+		/* rewrite all disk labels */
+		vdev_config_dirty(spa->spa_root_vdev);
+
+		if (vdev_resilver_needed(spa->spa_root_vdev,
+		    &scn->scn_phys.scn_min_txg, &scn->scn_phys.scn_max_txg)) {
+			spa_event_notify(spa, NULL, ESC_ZFS_RESILVER_START);
+		} else {
+			spa_event_notify(spa, NULL, ESC_ZFS_SCRUB_START);
+		}
+
+		spa->spa_scrub_started = B_TRUE;
+		/*
+		 * If this is an incremental scrub, limit the DDT scrub phase
+		 * to just the auto-ditto class (for correctness); the rest
+		 * of the scrub should go faster using top-down pruning.
+		 */
+		if (scn->scn_phys.scn_min_txg > TXG_INITIAL)
+			scn->scn_phys.scn_ddt_class_max = DDT_CLASS_DITTO;
+
+	}
+
+	/* back to the generic stuff */
+
+	if (dp->dp_blkstats == NULL) {
+		dp->dp_blkstats =
+		    kmem_alloc(sizeof (zfs_all_blkstats_t), KM_SLEEP);
+	}
+	bzero(dp->dp_blkstats, sizeof (zfs_all_blkstats_t));
+
+	if (spa_version(spa) < SPA_VERSION_DSL_SCRUB)
+		ot = DMU_OT_ZAP_OTHER;
+
+	scn->scn_phys.scn_queue_obj = zap_create(dp->dp_meta_objset,
+	    ot ? ot : DMU_OT_SCAN_QUEUE, DMU_OT_NONE, 0, tx);
+
+	dsl_scan_sync_state(scn, tx);
+
+	spa_history_log_internal(LOG_POOL_SCAN, spa, tx,
+	    "func=%u mintxg=%llu maxtxg=%llu",
+	    *funcp, scn->scn_phys.scn_min_txg, scn->scn_phys.scn_max_txg);
+}
+
+/* ARGSUSED */
+static void
+dsl_scan_done(dsl_scan_t *scn, boolean_t complete, dmu_tx_t *tx)
+{
+	static const char *old_names[] = {
+		"scrub_bookmark",
+		"scrub_ddt_bookmark",
+		"scrub_ddt_class_max",
+		"scrub_queue",
+		"scrub_min_txg",
+		"scrub_max_txg",
+		"scrub_func",
+		"scrub_errors",
+		NULL
+	};
+
+	dsl_pool_t *dp = scn->scn_dp;
+	spa_t *spa = dp->dp_spa;
+	int i;
+
+	/* Remove any remnants of an old-style scrub. */
+	for (i = 0; old_names[i]; i++) {
+		(void) zap_remove(dp->dp_meta_objset,
+		    DMU_POOL_DIRECTORY_OBJECT, old_names[i], tx);
+	}
+
+	if (scn->scn_phys.scn_queue_obj != 0) {
+		VERIFY(0 == dmu_object_free(dp->dp_meta_objset,
+		    scn->scn_phys.scn_queue_obj, tx));
+		scn->scn_phys.scn_queue_obj = 0;
+	}
+
+	/*
+	 * If we were "restarted" from a stopped state, don't bother
+	 * with anything else.
+	 */
+	if (scn->scn_phys.scn_state != DSS_SCANNING)
+		return;
+
+	if (complete)
+		scn->scn_phys.scn_state = DSS_FINISHED;
+	else
+		scn->scn_phys.scn_state = DSS_CANCELED;
+
+	spa_history_log_internal(LOG_POOL_SCAN_DONE, spa, tx,
+	    "complete=%u", complete);
+
+	if (DSL_SCAN_IS_SCRUB_RESILVER(scn)) {
+		mutex_enter(&spa->spa_scrub_lock);
+		while (spa->spa_scrub_inflight > 0) {
+			cv_wait(&spa->spa_scrub_io_cv,
+			    &spa->spa_scrub_lock);
+		}
+		mutex_exit(&spa->spa_scrub_lock);
+		spa->spa_scrub_started = B_FALSE;
+		spa->spa_scrub_active = B_FALSE;
+
+		/*
+		 * If the scrub/resilver completed, update all DTLs to
+		 * reflect this.  Whether it succeeded or not, vacate
+		 * all temporary scrub DTLs.
+		 */
+		vdev_dtl_reassess(spa->spa_root_vdev, tx->tx_txg,
+		    complete ? scn->scn_phys.scn_max_txg : 0, B_TRUE);
+		if (complete) {
+			spa_event_notify(spa, NULL, scn->scn_phys.scn_min_txg ?
+			    ESC_ZFS_RESILVER_FINISH : ESC_ZFS_SCRUB_FINISH);
+		}
+		spa_errlog_rotate(spa);
+
+		/*
+		 * We may have finished replacing a device.
+		 * Let the async thread assess this and handle the detach.
+		 */
+		spa_async_request(spa, SPA_ASYNC_RESILVER_DONE);
+	}
+
+	scn->scn_phys.scn_end_time = gethrestime_sec();
+}
+
+/* ARGSUSED */
+static int
+dsl_scan_cancel_check(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_scan_t *scn = arg1;
+
+	if (scn->scn_phys.scn_state != DSS_SCANNING)
+		return (ENOENT);
+	return (0);
+}
+
+/* ARGSUSED */
+static void
+dsl_scan_cancel_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	dsl_scan_t *scn = arg1;
+
+	dsl_scan_done(scn, B_FALSE, tx);
+	dsl_scan_sync_state(scn, tx);
+}
+
+int
+dsl_scan_cancel(dsl_pool_t *dp)
+{
+	boolean_t complete = B_FALSE;
+	int err;
+
+	err = dsl_sync_task_do(dp, dsl_scan_cancel_check,
+	    dsl_scan_cancel_sync, dp->dp_scan, &complete, 3);
+	return (err);
+}
+
+static void dsl_scan_visitbp(blkptr_t *bp,
+    const zbookmark_t *zb, dnode_phys_t *dnp, arc_buf_t *pbuf,
+    dsl_dataset_t *ds, dsl_scan_t *scn, dmu_objset_type_t ostype,
+    dmu_tx_t *tx);
+static void dsl_scan_visitdnode(dsl_scan_t *, dsl_dataset_t *ds,
+    dmu_objset_type_t ostype,
+    dnode_phys_t *dnp, arc_buf_t *buf, uint64_t object, dmu_tx_t *tx);
+
+void
+dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bp)
+{
+	zio_free(dp->dp_spa, txg, bp);
+}
+
+void
+dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp)
+{
+	ASSERT(dsl_pool_sync_context(dp));
+	zio_nowait(zio_free_sync(pio, dp->dp_spa, txg, bpp, pio->io_flags));
+}
+
+int
+dsl_read(zio_t *pio, spa_t *spa, const blkptr_t *bpp, arc_buf_t *pbuf,
+    arc_done_func_t *done, void *private, int priority, int zio_flags,
+    uint32_t *arc_flags, const zbookmark_t *zb)
+{
+	return (arc_read(pio, spa, bpp, pbuf, done, private,
+	    priority, zio_flags, arc_flags, zb));
+}
+
+int
+dsl_read_nolock(zio_t *pio, spa_t *spa, const blkptr_t *bpp,
+    arc_done_func_t *done, void *private, int priority, int zio_flags,
+    uint32_t *arc_flags, const zbookmark_t *zb)
+{
+	return (arc_read_nolock(pio, spa, bpp, done, private,
+	    priority, zio_flags, arc_flags, zb));
+}
+
+static boolean_t
+bookmark_is_zero(const zbookmark_t *zb)
+{
+	return (zb->zb_objset == 0 && zb->zb_object == 0 &&
+	    zb->zb_level == 0 && zb->zb_blkid == 0);
+}
+
+/* dnp is the dnode for zb1->zb_object */
+static boolean_t
+bookmark_is_before(const dnode_phys_t *dnp, const zbookmark_t *zb1,
+    const zbookmark_t *zb2)
+{
+	uint64_t zb1nextL0, zb2thisobj;
+
+	ASSERT(zb1->zb_objset == zb2->zb_objset);
+	ASSERT(zb2->zb_level == 0);
+
+	/*
+	 * A bookmark in the deadlist is considered to be after
+	 * everything else.
+	 */
+	if (zb2->zb_object == DMU_DEADLIST_OBJECT)
+		return (B_TRUE);
+
+	/* The objset_phys_t isn't before anything. */
+	if (dnp == NULL)
+		return (B_FALSE);
+
+	zb1nextL0 = (zb1->zb_blkid + 1) <<
+	    ((zb1->zb_level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT));
+
+	zb2thisobj = zb2->zb_object ? zb2->zb_object :
+	    zb2->zb_blkid << (DNODE_BLOCK_SHIFT - DNODE_SHIFT);
+
+	if (zb1->zb_object == DMU_META_DNODE_OBJECT) {
+		uint64_t nextobj = zb1nextL0 *
+		    (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT) >> DNODE_SHIFT;
+		return (nextobj <= zb2thisobj);
+	}
+
+	if (zb1->zb_object < zb2thisobj)
+		return (B_TRUE);
+	if (zb1->zb_object > zb2thisobj)
+		return (B_FALSE);
+	if (zb2->zb_object == DMU_META_DNODE_OBJECT)
+		return (B_FALSE);
+	return (zb1nextL0 <= zb2->zb_blkid);
+}
+
+static uint64_t
+dsl_scan_ds_maxtxg(dsl_dataset_t *ds)
+{
+	uint64_t smt = ds->ds_dir->dd_pool->dp_scan->scn_phys.scn_max_txg;
+	if (dsl_dataset_is_snapshot(ds))
+		return (MIN(smt, ds->ds_phys->ds_creation_txg));
+	return (smt);
+}
+
+static void
+dsl_scan_sync_state(dsl_scan_t *scn, dmu_tx_t *tx)
+{
+	VERIFY(0 == zap_update(scn->scn_dp->dp_meta_objset,
+	    DMU_POOL_DIRECTORY_OBJECT,
+	    DMU_POOL_SCAN, sizeof (uint64_t), SCAN_PHYS_NUMINTS,
+	    &scn->scn_phys, tx));
+}
+
+static boolean_t
+dsl_scan_check_pause(dsl_scan_t *scn, const zbookmark_t *zb)
+{
+	uint64_t elapsed_nanosecs;
+	int mintime;
+
+	/* we never skip user/group accounting objects */
+	if (zb && (int64_t)zb->zb_object < 0)
+		return (B_FALSE);
+
+	if (scn->scn_pausing)
+		return (B_TRUE); /* we're already pausing */
+
+	if (!bookmark_is_zero(&scn->scn_phys.scn_bookmark))
+		return (B_FALSE); /* we're resuming */
+
+	/* We only know how to resume from level-0 blocks. */
+	if (zb && zb->zb_level != 0)
+		return (B_FALSE);
+
+	mintime = (scn->scn_phys.scn_func == POOL_SCAN_RESILVER) ?
+	    zfs_resilver_min_time_ms : zfs_scan_min_time_ms;
+	elapsed_nanosecs = gethrtime() - scn->scn_sync_start_time;
+	if (elapsed_nanosecs / NANOSEC > zfs_txg_timeout ||
+	    (elapsed_nanosecs / MICROSEC > mintime &&
+	    txg_sync_waiting(scn->scn_dp)) ||
+	    spa_shutting_down(scn->scn_dp->dp_spa)) {
+		if (zb) {
+			dprintf("pausing at bookmark %llx/%llx/%llx/%llx\n",
+			    (longlong_t)zb->zb_objset,
+			    (longlong_t)zb->zb_object,
+			    (longlong_t)zb->zb_level,
+			    (longlong_t)zb->zb_blkid);
+			scn->scn_phys.scn_bookmark = *zb;
+		}
+		dprintf("pausing at DDT bookmark %llx/%llx/%llx/%llx\n",
+		    (longlong_t)scn->scn_phys.scn_ddt_bookmark.ddb_class,
+		    (longlong_t)scn->scn_phys.scn_ddt_bookmark.ddb_type,
+		    (longlong_t)scn->scn_phys.scn_ddt_bookmark.ddb_checksum,
+		    (longlong_t)scn->scn_phys.scn_ddt_bookmark.ddb_cursor);
+		scn->scn_pausing = B_TRUE;
+		return (B_TRUE);
+	}
+	return (B_FALSE);
+}
+
+typedef struct zil_scan_arg {
+	dsl_pool_t	*zsa_dp;
+	zil_header_t	*zsa_zh;
+} zil_scan_arg_t;
+
+/* ARGSUSED */
+static int
+dsl_scan_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg)
+{
+	zil_scan_arg_t *zsa = arg;
+	dsl_pool_t *dp = zsa->zsa_dp;
+	dsl_scan_t *scn = dp->dp_scan;
+	zil_header_t *zh = zsa->zsa_zh;
+	zbookmark_t zb;
+
+	if (bp->blk_birth <= scn->scn_phys.scn_cur_min_txg)
+		return (0);
+
+	/*
+	 * One block ("stubby") can be allocated a long time ago; we
+	 * want to visit that one because it has been allocated
+	 * (on-disk) even if it hasn't been claimed (even though for
+	 * scrub there's nothing to do to it).
+	 */
+	if (claim_txg == 0 && bp->blk_birth >= spa_first_txg(dp->dp_spa))
+		return (0);
+
+	SET_BOOKMARK(&zb, zh->zh_log.blk_cksum.zc_word[ZIL_ZC_OBJSET],
+	    ZB_ZIL_OBJECT, ZB_ZIL_LEVEL, bp->blk_cksum.zc_word[ZIL_ZC_SEQ]);
+
+	VERIFY(0 == scan_funcs[scn->scn_phys.scn_func](dp, bp, &zb));
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+dsl_scan_zil_record(zilog_t *zilog, lr_t *lrc, void *arg, uint64_t claim_txg)
+{
+	if (lrc->lrc_txtype == TX_WRITE) {
+		zil_scan_arg_t *zsa = arg;
+		dsl_pool_t *dp = zsa->zsa_dp;
+		dsl_scan_t *scn = dp->dp_scan;
+		zil_header_t *zh = zsa->zsa_zh;
+		lr_write_t *lr = (lr_write_t *)lrc;
+		blkptr_t *bp = &lr->lr_blkptr;
+		zbookmark_t zb;
+
+		if (bp->blk_birth <= scn->scn_phys.scn_cur_min_txg)
+			return (0);
+
+		/*
+		 * birth can be < claim_txg if this record's txg is
+		 * already txg sync'ed (but this log block contains
+		 * other records that are not synced)
+		 */
+		if (claim_txg == 0 || bp->blk_birth < claim_txg)
+			return (0);
+
+		SET_BOOKMARK(&zb, zh->zh_log.blk_cksum.zc_word[ZIL_ZC_OBJSET],
+		    lr->lr_foid, ZB_ZIL_LEVEL,
+		    lr->lr_offset / BP_GET_LSIZE(bp));
+
+		VERIFY(0 == scan_funcs[scn->scn_phys.scn_func](dp, bp, &zb));
+	}
+	return (0);
+}
+
+static void
+dsl_scan_zil(dsl_pool_t *dp, zil_header_t *zh)
+{
+	uint64_t claim_txg = zh->zh_claim_txg;
+	zil_scan_arg_t zsa = { dp, zh };
+	zilog_t *zilog;
+
+	/*
+	 * We only want to visit blocks that have been claimed but not yet
+	 * replayed (or, in read-only mode, blocks that *would* be claimed).
+	 */
+	if (claim_txg == 0 && spa_writeable(dp->dp_spa))
+		return;
+
+	zilog = zil_alloc(dp->dp_meta_objset, zh);
+
+	(void) zil_parse(zilog, dsl_scan_zil_block, dsl_scan_zil_record, &zsa,
+	    claim_txg);
+
+	zil_free(zilog);
+}
+
+/* ARGSUSED */
+static void
+dsl_scan_prefetch(dsl_scan_t *scn, arc_buf_t *buf, blkptr_t *bp,
+    uint64_t objset, uint64_t object, uint64_t blkid)
+{
+	zbookmark_t czb;
+	uint32_t flags = ARC_NOWAIT | ARC_PREFETCH;
+
+	if (zfs_no_scrub_prefetch)
+		return;
+
+	if (BP_IS_HOLE(bp) || bp->blk_birth <= scn->scn_phys.scn_min_txg ||
+	    (BP_GET_LEVEL(bp) == 0 && BP_GET_TYPE(bp) != DMU_OT_DNODE))
+		return;
+
+	SET_BOOKMARK(&czb, objset, object, BP_GET_LEVEL(bp), blkid);
+
+	/*
+	 * XXX need to make sure all of these arc_read() prefetches are
+	 * done before setting xlateall (similar to dsl_read())
+	 */
+	(void) arc_read(scn->scn_zio_root, scn->scn_dp->dp_spa, bp,
+	    buf, NULL, NULL, ZIO_PRIORITY_ASYNC_READ,
+	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SCAN_THREAD, &flags, &czb);
+}
+
+static boolean_t
+dsl_scan_check_resume(dsl_scan_t *scn, const dnode_phys_t *dnp,
+    const zbookmark_t *zb)
+{
+	/*
+	 * We never skip over user/group accounting objects (obj<0)
+	 */
+	if (!bookmark_is_zero(&scn->scn_phys.scn_bookmark) &&
+	    (int64_t)zb->zb_object >= 0) {
+		/*
+		 * If we already visited this bp & everything below (in
+		 * a prior txg sync), don't bother doing it again.
+		 */
+		if (bookmark_is_before(dnp, zb, &scn->scn_phys.scn_bookmark))
+			return (B_TRUE);
+
+		/*
+		 * If we found the block we're trying to resume from, or
+		 * we went past it to a different object, zero it out to
+		 * indicate that it's OK to start checking for pausing
+		 * again.
+		 */
+		if (bcmp(zb, &scn->scn_phys.scn_bookmark, sizeof (*zb)) == 0 ||
+		    zb->zb_object > scn->scn_phys.scn_bookmark.zb_object) {
+			dprintf("resuming at %llx/%llx/%llx/%llx\n",
+			    (longlong_t)zb->zb_objset,
+			    (longlong_t)zb->zb_object,
+			    (longlong_t)zb->zb_level,
+			    (longlong_t)zb->zb_blkid);
+			bzero(&scn->scn_phys.scn_bookmark, sizeof (*zb));
+		}
+	}
+	return (B_FALSE);
+}
+
+/*
+ * Return nonzero on i/o error.
+ * Return new buf to write out in *bufp.
+ */
+static int
+dsl_scan_recurse(dsl_scan_t *scn, dsl_dataset_t *ds, dmu_objset_type_t ostype,
+    dnode_phys_t *dnp, const blkptr_t *bp,
+    const zbookmark_t *zb, dmu_tx_t *tx, arc_buf_t **bufp)
+{
+	dsl_pool_t *dp = scn->scn_dp;
+	int zio_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCAN_THREAD;
+	int err;
+
+	if (BP_GET_LEVEL(bp) > 0) {
+		uint32_t flags = ARC_WAIT;
+		int i;
+		blkptr_t *cbp;
+		int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
+
+		err = arc_read_nolock(NULL, dp->dp_spa, bp,
+		    arc_getbuf_func, bufp,
+		    ZIO_PRIORITY_ASYNC_READ, zio_flags, &flags, zb);
+		if (err) {
+			scn->scn_phys.scn_errors++;
+			return (err);
+		}
+		for (i = 0, cbp = (*bufp)->b_data; i < epb; i++, cbp++) {
+			dsl_scan_prefetch(scn, *bufp, cbp, zb->zb_objset,
+			    zb->zb_object, zb->zb_blkid * epb + i);
+		}
+		for (i = 0, cbp = (*bufp)->b_data; i < epb; i++, cbp++) {
+			zbookmark_t czb;
+
+			SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
+			    zb->zb_level - 1,
+			    zb->zb_blkid * epb + i);
+			dsl_scan_visitbp(cbp, &czb, dnp,
+			    *bufp, ds, scn, ostype, tx);
+		}
+	} else if (BP_GET_TYPE(bp) == DMU_OT_USERGROUP_USED) {
+		uint32_t flags = ARC_WAIT;
+
+		err = arc_read_nolock(NULL, dp->dp_spa, bp,
+		    arc_getbuf_func, bufp,
+		    ZIO_PRIORITY_ASYNC_READ, zio_flags, &flags, zb);
+		if (err) {
+			scn->scn_phys.scn_errors++;
+			return (err);
+		}
+	} else if (BP_GET_TYPE(bp) == DMU_OT_DNODE) {
+		uint32_t flags = ARC_WAIT;
+		dnode_phys_t *cdnp;
+		int i, j;
+		int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT;
+
+		err = arc_read_nolock(NULL, dp->dp_spa, bp,
+		    arc_getbuf_func, bufp,
+		    ZIO_PRIORITY_ASYNC_READ, zio_flags, &flags, zb);
+		if (err) {
+			scn->scn_phys.scn_errors++;
+			return (err);
+		}
+		for (i = 0, cdnp = (*bufp)->b_data; i < epb; i++, cdnp++) {
+			for (j = 0; j < cdnp->dn_nblkptr; j++) {
+				blkptr_t *cbp = &cdnp->dn_blkptr[j];
+				dsl_scan_prefetch(scn, *bufp, cbp,
+				    zb->zb_objset, zb->zb_blkid * epb + i, j);
+			}
+		}
+		for (i = 0, cdnp = (*bufp)->b_data; i < epb; i++, cdnp++) {
+			dsl_scan_visitdnode(scn, ds, ostype,
+			    cdnp, *bufp, zb->zb_blkid * epb + i, tx);
+		}
+
+	} else if (BP_GET_TYPE(bp) == DMU_OT_OBJSET) {
+		uint32_t flags = ARC_WAIT;
+		objset_phys_t *osp;
+
+		err = arc_read_nolock(NULL, dp->dp_spa, bp,
+		    arc_getbuf_func, bufp,
+		    ZIO_PRIORITY_ASYNC_READ, zio_flags, &flags, zb);
+		if (err) {
+			scn->scn_phys.scn_errors++;
+			return (err);
+		}
+
+		osp = (*bufp)->b_data;
+
+		dsl_scan_visitdnode(scn, ds, osp->os_type,
+		    &osp->os_meta_dnode, *bufp, DMU_META_DNODE_OBJECT, tx);
+
+		if (OBJSET_BUF_HAS_USERUSED(*bufp)) {
+			/*
+			 * We also always visit user/group accounting
+			 * objects, and never skip them, even if we are
+			 * pausing.  This is necessary so that the space
+			 * deltas from this txg get integrated.
+			 */
+			dsl_scan_visitdnode(scn, ds, osp->os_type,
+			    &osp->os_groupused_dnode, *bufp,
+			    DMU_GROUPUSED_OBJECT, tx);
+			dsl_scan_visitdnode(scn, ds, osp->os_type,
+			    &osp->os_userused_dnode, *bufp,
+			    DMU_USERUSED_OBJECT, tx);
+		}
+	}
+
+	return (0);
+}
+
+static void
+dsl_scan_visitdnode(dsl_scan_t *scn, dsl_dataset_t *ds,
+    dmu_objset_type_t ostype, dnode_phys_t *dnp, arc_buf_t *buf,
+    uint64_t object, dmu_tx_t *tx)
+{
+	int j;
+
+	for (j = 0; j < dnp->dn_nblkptr; j++) {
+		zbookmark_t czb;
+
+		SET_BOOKMARK(&czb, ds ? ds->ds_object : 0, object,
+		    dnp->dn_nlevels - 1, j);
+		dsl_scan_visitbp(&dnp->dn_blkptr[j],
+		    &czb, dnp, buf, ds, scn, ostype, tx);
+	}
+
+	if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) {
+		zbookmark_t czb;
+		SET_BOOKMARK(&czb, ds ? ds->ds_object : 0, object,
+		    0, DMU_SPILL_BLKID);
+		dsl_scan_visitbp(&dnp->dn_spill,
+		    &czb, dnp, buf, ds, scn, ostype, tx);
+	}
+}
+
+/*
+ * The arguments are in this order because mdb can only print the
+ * first 5; we want them to be useful.
+ */
+static void
+dsl_scan_visitbp(blkptr_t *bp, const zbookmark_t *zb,
+    dnode_phys_t *dnp, arc_buf_t *pbuf,
+    dsl_dataset_t *ds, dsl_scan_t *scn, dmu_objset_type_t ostype,
+    dmu_tx_t *tx)
+{
+	dsl_pool_t *dp = scn->scn_dp;
+	arc_buf_t *buf = NULL;
+	blkptr_t bp_toread = *bp;
+
+	/* ASSERT(pbuf == NULL || arc_released(pbuf)); */
+
+	if (dsl_scan_check_pause(scn, zb))
+		return;
+
+	if (dsl_scan_check_resume(scn, dnp, zb))
+		return;
+
+	if (bp->blk_birth == 0)
+		return;
+
+	scn->scn_visited_this_txg++;
+
+	dprintf_bp(bp,
+	    "visiting ds=%p/%llu zb=%llx/%llx/%llx/%llx buf=%p bp=%p",
+	    ds, ds ? ds->ds_object : 0,
+	    zb->zb_objset, zb->zb_object, zb->zb_level, zb->zb_blkid,
+	    pbuf, bp);
+
+	if (bp->blk_birth <= scn->scn_phys.scn_cur_min_txg)
+		return;
+
+	if (BP_GET_TYPE(bp) != DMU_OT_USERGROUP_USED) {
+		/*
+		 * For non-user-accounting blocks, we need to read the
+		 * new bp (from a deleted snapshot, found in
+		 * check_existing_xlation).  If we used the old bp,
+		 * pointers inside this block from before we resumed
+		 * would be untranslated.
+		 *
+		 * For user-accounting blocks, we need to read the old
+		 * bp, because we will apply the entire space delta to
+		 * it (original untranslated -> translations from
+		 * deleted snap -> now).
+		 */
+		bp_toread = *bp;
+	}
+
+	if (dsl_scan_recurse(scn, ds, ostype, dnp, &bp_toread, zb, tx,
+	    &buf) != 0)
+		return;
+
+	/*
+	 * If dsl_scan_ddt() has aready visited this block, it will have
+	 * already done any translations or scrubbing, so don't call the
+	 * callback again.
+	 */
+	if (ddt_class_contains(dp->dp_spa,
+	    scn->scn_phys.scn_ddt_class_max, bp)) {
+		ASSERT(buf == NULL);
+		return;
+	}
+
+	/*
+	 * If this block is from the future (after cur_max_txg), then we
+	 * are doing this on behalf of a deleted snapshot, and we will
+	 * revisit the future block on the next pass of this dataset.
+	 * Don't scan it now unless we need to because something
+	 * under it was modified.
+	 */
+	if (bp->blk_birth <= scn->scn_phys.scn_cur_max_txg) {
+		scan_funcs[scn->scn_phys.scn_func](dp, bp, zb);
+	}
+	if (buf)
+		(void) arc_buf_remove_ref(buf, &buf);
+}
+
+static void
+dsl_scan_visit_rootbp(dsl_scan_t *scn, dsl_dataset_t *ds, blkptr_t *bp,
+    dmu_tx_t *tx)
+{
+	zbookmark_t zb;
+
+	SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET,
+	    ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
+	dsl_scan_visitbp(bp, &zb, NULL, NULL,
+	    ds, scn, DMU_OST_NONE, tx);
+
+	dprintf_ds(ds, "finished scan%s", "");
+}
+
+void
+dsl_scan_ds_destroyed(dsl_dataset_t *ds, dmu_tx_t *tx)
+{
+	dsl_pool_t *dp = ds->ds_dir->dd_pool;
+	dsl_scan_t *scn = dp->dp_scan;
+	uint64_t mintxg;
+
+	if (scn->scn_phys.scn_state != DSS_SCANNING)
+		return;
+
+	if (scn->scn_phys.scn_bookmark.zb_objset == ds->ds_object) {
+		if (dsl_dataset_is_snapshot(ds)) {
+			/* Note, scn_cur_{min,max}_txg stays the same. */
+			scn->scn_phys.scn_bookmark.zb_objset =
+			    ds->ds_phys->ds_next_snap_obj;
+			zfs_dbgmsg("destroying ds %llu; currently traversing; "
+			    "reset zb_objset to %llu",
+			    (u_longlong_t)ds->ds_object,
+			    (u_longlong_t)ds->ds_phys->ds_next_snap_obj);
+			scn->scn_phys.scn_flags |= DSF_VISIT_DS_AGAIN;
+		} else {
+			SET_BOOKMARK(&scn->scn_phys.scn_bookmark,
+			    ZB_DESTROYED_OBJSET, 0, 0, 0);
+			zfs_dbgmsg("destroying ds %llu; currently traversing; "
+			    "reset bookmark to -1,0,0,0",
+			    (u_longlong_t)ds->ds_object);
+		}
+	} else if (zap_lookup_int_key(dp->dp_meta_objset,
+	    scn->scn_phys.scn_queue_obj, ds->ds_object, &mintxg) == 0) {
+		ASSERT3U(ds->ds_phys->ds_num_children, <=, 1);
+		VERIFY3U(0, ==, zap_remove_int(dp->dp_meta_objset,
+		    scn->scn_phys.scn_queue_obj, ds->ds_object, tx));
+		if (dsl_dataset_is_snapshot(ds)) {
+			/*
+			 * We keep the same mintxg; it could be >
+			 * ds_creation_txg if the previous snapshot was
+			 * deleted too.
+			 */
+			VERIFY(zap_add_int_key(dp->dp_meta_objset,
+			    scn->scn_phys.scn_queue_obj,
+			    ds->ds_phys->ds_next_snap_obj, mintxg, tx) == 0);
+			zfs_dbgmsg("destroying ds %llu; in queue; "
+			    "replacing with %llu",
+			    (u_longlong_t)ds->ds_object,
+			    (u_longlong_t)ds->ds_phys->ds_next_snap_obj);
+		} else {
+			zfs_dbgmsg("destroying ds %llu; in queue; removing",
+			    (u_longlong_t)ds->ds_object);
+		}
+	} else {
+		zfs_dbgmsg("destroying ds %llu; ignoring",
+		    (u_longlong_t)ds->ds_object);
+	}
+
+	/*
+	 * dsl_scan_sync() should be called after this, and should sync
+	 * out our changed state, but just to be safe, do it here.
+	 */
+	dsl_scan_sync_state(scn, tx);
+}
+
+void
+dsl_scan_ds_snapshotted(dsl_dataset_t *ds, dmu_tx_t *tx)
+{
+	dsl_pool_t *dp = ds->ds_dir->dd_pool;
+	dsl_scan_t *scn = dp->dp_scan;
+	uint64_t mintxg;
+
+	if (scn->scn_phys.scn_state != DSS_SCANNING)
+		return;
+
+	ASSERT(ds->ds_phys->ds_prev_snap_obj != 0);
+
+	if (scn->scn_phys.scn_bookmark.zb_objset == ds->ds_object) {
+		scn->scn_phys.scn_bookmark.zb_objset =
+		    ds->ds_phys->ds_prev_snap_obj;
+		zfs_dbgmsg("snapshotting ds %llu; currently traversing; "
+		    "reset zb_objset to %llu",
+		    (u_longlong_t)ds->ds_object,
+		    (u_longlong_t)ds->ds_phys->ds_prev_snap_obj);
+	} else if (zap_lookup_int_key(dp->dp_meta_objset,
+	    scn->scn_phys.scn_queue_obj, ds->ds_object, &mintxg) == 0) {
+		VERIFY3U(0, ==, zap_remove_int(dp->dp_meta_objset,
+		    scn->scn_phys.scn_queue_obj, ds->ds_object, tx));
+		VERIFY(zap_add_int_key(dp->dp_meta_objset,
+		    scn->scn_phys.scn_queue_obj,
+		    ds->ds_phys->ds_prev_snap_obj, mintxg, tx) == 0);
+		zfs_dbgmsg("snapshotting ds %llu; in queue; "
+		    "replacing with %llu",
+		    (u_longlong_t)ds->ds_object,
+		    (u_longlong_t)ds->ds_phys->ds_prev_snap_obj);
+	}
+	dsl_scan_sync_state(scn, tx);
+}
+
+void
+dsl_scan_ds_clone_swapped(dsl_dataset_t *ds1, dsl_dataset_t *ds2, dmu_tx_t *tx)
+{
+	dsl_pool_t *dp = ds1->ds_dir->dd_pool;
+	dsl_scan_t *scn = dp->dp_scan;
+	uint64_t mintxg;
+
+	if (scn->scn_phys.scn_state != DSS_SCANNING)
+		return;
+
+	if (scn->scn_phys.scn_bookmark.zb_objset == ds1->ds_object) {
+		scn->scn_phys.scn_bookmark.zb_objset = ds2->ds_object;
+		zfs_dbgmsg("clone_swap ds %llu; currently traversing; "
+		    "reset zb_objset to %llu",
+		    (u_longlong_t)ds1->ds_object,
+		    (u_longlong_t)ds2->ds_object);
+	} else if (scn->scn_phys.scn_bookmark.zb_objset == ds2->ds_object) {
+		scn->scn_phys.scn_bookmark.zb_objset = ds1->ds_object;
+		zfs_dbgmsg("clone_swap ds %llu; currently traversing; "
+		    "reset zb_objset to %llu",
+		    (u_longlong_t)ds2->ds_object,
+		    (u_longlong_t)ds1->ds_object);
+	}
+
+	if (zap_lookup_int_key(dp->dp_meta_objset, scn->scn_phys.scn_queue_obj,
+	    ds1->ds_object, &mintxg) == 0) {
+		int err;
+
+		ASSERT3U(mintxg, ==, ds1->ds_phys->ds_prev_snap_txg);
+		ASSERT3U(mintxg, ==, ds2->ds_phys->ds_prev_snap_txg);
+		VERIFY3U(0, ==, zap_remove_int(dp->dp_meta_objset,
+		    scn->scn_phys.scn_queue_obj, ds1->ds_object, tx));
+		err = zap_add_int_key(dp->dp_meta_objset,
+		    scn->scn_phys.scn_queue_obj, ds2->ds_object, mintxg, tx);
+		VERIFY(err == 0 || err == EEXIST);
+		if (err == EEXIST) {
+			/* Both were there to begin with */
+			VERIFY(0 == zap_add_int_key(dp->dp_meta_objset,
+			    scn->scn_phys.scn_queue_obj,
+			    ds1->ds_object, mintxg, tx));
+		}
+		zfs_dbgmsg("clone_swap ds %llu; in queue; "
+		    "replacing with %llu",
+		    (u_longlong_t)ds1->ds_object,
+		    (u_longlong_t)ds2->ds_object);
+	} else if (zap_lookup_int_key(dp->dp_meta_objset,
+	    scn->scn_phys.scn_queue_obj, ds2->ds_object, &mintxg) == 0) {
+		ASSERT3U(mintxg, ==, ds1->ds_phys->ds_prev_snap_txg);
+		ASSERT3U(mintxg, ==, ds2->ds_phys->ds_prev_snap_txg);
+		VERIFY3U(0, ==, zap_remove_int(dp->dp_meta_objset,
+		    scn->scn_phys.scn_queue_obj, ds2->ds_object, tx));
+		VERIFY(0 == zap_add_int_key(dp->dp_meta_objset,
+		    scn->scn_phys.scn_queue_obj, ds1->ds_object, mintxg, tx));
+		zfs_dbgmsg("clone_swap ds %llu; in queue; "
+		    "replacing with %llu",
+		    (u_longlong_t)ds2->ds_object,
+		    (u_longlong_t)ds1->ds_object);
+	}
+
+	dsl_scan_sync_state(scn, tx);
+}
+
+struct enqueue_clones_arg {
+	dmu_tx_t *tx;
+	uint64_t originobj;
+};
+
+/* ARGSUSED */
+static int
+enqueue_clones_cb(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)
+{
+	struct enqueue_clones_arg *eca = arg;
+	dsl_dataset_t *ds;
+	int err;
+	dsl_pool_t *dp = spa->spa_dsl_pool;
+	dsl_scan_t *scn = dp->dp_scan;
+
+	err = dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds);
+	if (err)
+		return (err);
+
+	if (ds->ds_dir->dd_phys->dd_origin_obj == eca->originobj) {
+		while (ds->ds_phys->ds_prev_snap_obj != eca->originobj) {
+			dsl_dataset_t *prev;
+			err = dsl_dataset_hold_obj(dp,
+			    ds->ds_phys->ds_prev_snap_obj, FTAG, &prev);
+
+			dsl_dataset_rele(ds, FTAG);
+			if (err)
+				return (err);
+			ds = prev;
+		}
+		VERIFY(zap_add_int_key(dp->dp_meta_objset,
+		    scn->scn_phys.scn_queue_obj, ds->ds_object,
+		    ds->ds_phys->ds_prev_snap_txg, eca->tx) == 0);
+	}
+	dsl_dataset_rele(ds, FTAG);
+	return (0);
+}
+
+static void
+dsl_scan_visitds(dsl_scan_t *scn, uint64_t dsobj, dmu_tx_t *tx)
+{
+	dsl_pool_t *dp = scn->scn_dp;
+	dsl_dataset_t *ds;
+	objset_t *os;
+
+	VERIFY3U(0, ==, dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds));
+
+	if (dmu_objset_from_ds(ds, &os))
+		goto out;
+
+	/*
+	 * Only the ZIL in the head (non-snapshot) is valid.  Even though
+	 * snapshots can have ZIL block pointers (which may be the same
+	 * BP as in the head), they must be ignored.  So we traverse the
+	 * ZIL here, rather than in scan_recurse(), because the regular
+	 * snapshot block-sharing rules don't apply to it.
+	 */
+	if (DSL_SCAN_IS_SCRUB_RESILVER(scn) && !dsl_dataset_is_snapshot(ds))
+		dsl_scan_zil(dp, &os->os_zil_header);
+
+	/*
+	 * Iterate over the bps in this ds.
+	 */
+	dmu_buf_will_dirty(ds->ds_dbuf, tx);
+	dsl_scan_visit_rootbp(scn, ds, &ds->ds_phys->ds_bp, tx);
+
+	char *dsname = kmem_alloc(ZFS_MAXNAMELEN, KM_SLEEP);
+	dsl_dataset_name(ds, dsname);
+	zfs_dbgmsg("scanned dataset %llu (%s) with min=%llu max=%llu; "
+	    "pausing=%u",
+	    (longlong_t)dsobj, dsname,
+	    (longlong_t)scn->scn_phys.scn_cur_min_txg,
+	    (longlong_t)scn->scn_phys.scn_cur_max_txg,
+	    (int)scn->scn_pausing);
+	kmem_free(dsname, ZFS_MAXNAMELEN);
+
+	if (scn->scn_pausing)
+		goto out;
+
+	/*
+	 * We've finished this pass over this dataset.
+	 */
+
+	/*
+	 * If we did not completely visit this dataset, do another pass.
+	 */
+	if (scn->scn_phys.scn_flags & DSF_VISIT_DS_AGAIN) {
+		zfs_dbgmsg("incomplete pass; visiting again");
+		scn->scn_phys.scn_flags &= ~DSF_VISIT_DS_AGAIN;
+		VERIFY(zap_add_int_key(dp->dp_meta_objset,
+		    scn->scn_phys.scn_queue_obj, ds->ds_object,
+		    scn->scn_phys.scn_cur_max_txg, tx) == 0);
+		goto out;
+	}
+
+	/*
+	 * Add descendent datasets to work queue.
+	 */
+	if (ds->ds_phys->ds_next_snap_obj != 0) {
+		VERIFY(zap_add_int_key(dp->dp_meta_objset,
+		    scn->scn_phys.scn_queue_obj, ds->ds_phys->ds_next_snap_obj,
+		    ds->ds_phys->ds_creation_txg, tx) == 0);
+	}
+	if (ds->ds_phys->ds_num_children > 1) {
+		boolean_t usenext = B_FALSE;
+		if (ds->ds_phys->ds_next_clones_obj != 0) {
+			uint64_t count;
+			/*
+			 * A bug in a previous version of the code could
+			 * cause upgrade_clones_cb() to not set
+			 * ds_next_snap_obj when it should, leading to a
+			 * missing entry.  Therefore we can only use the
+			 * next_clones_obj when its count is correct.
+			 */
+			int err = zap_count(dp->dp_meta_objset,
+			    ds->ds_phys->ds_next_clones_obj, &count);
+			if (err == 0 &&
+			    count == ds->ds_phys->ds_num_children - 1)
+				usenext = B_TRUE;
+		}
+
+		if (usenext) {
+			VERIFY(zap_join_key(dp->dp_meta_objset,
+			    ds->ds_phys->ds_next_clones_obj,
+			    scn->scn_phys.scn_queue_obj,
+			    ds->ds_phys->ds_creation_txg, tx) == 0);
+		} else {
+			struct enqueue_clones_arg eca;
+			eca.tx = tx;
+			eca.originobj = ds->ds_object;
+
+			(void) dmu_objset_find_spa(ds->ds_dir->dd_pool->dp_spa,
+			    NULL, enqueue_clones_cb, &eca, DS_FIND_CHILDREN);
+		}
+	}
+
+out:
+	dsl_dataset_rele(ds, FTAG);
+}
+
+/* ARGSUSED */
+static int
+enqueue_cb(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)
+{
+	dmu_tx_t *tx = arg;
+	dsl_dataset_t *ds;
+	int err;
+	dsl_pool_t *dp = spa->spa_dsl_pool;
+	dsl_scan_t *scn = dp->dp_scan;
+
+	err = dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds);
+	if (err)
+		return (err);
+
+	while (ds->ds_phys->ds_prev_snap_obj != 0) {
+		dsl_dataset_t *prev;
+		err = dsl_dataset_hold_obj(dp, ds->ds_phys->ds_prev_snap_obj,
+		    FTAG, &prev);
+		if (err) {
+			dsl_dataset_rele(ds, FTAG);
+			return (err);
+		}
+
+		/*
+		 * If this is a clone, we don't need to worry about it for now.
+		 */
+		if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) {
+			dsl_dataset_rele(ds, FTAG);
+			dsl_dataset_rele(prev, FTAG);
+			return (0);
+		}
+		dsl_dataset_rele(ds, FTAG);
+		ds = prev;
+	}
+
+	VERIFY(zap_add_int_key(dp->dp_meta_objset, scn->scn_phys.scn_queue_obj,
+	    ds->ds_object, ds->ds_phys->ds_prev_snap_txg, tx) == 0);
+	dsl_dataset_rele(ds, FTAG);
+	return (0);
+}
+
+/*
+ * Scrub/dedup interaction.
+ *
+ * If there are N references to a deduped block, we don't want to scrub it
+ * N times -- ideally, we should scrub it exactly once.
+ *
+ * We leverage the fact that the dde's replication class (enum ddt_class)
+ * is ordered from highest replication class (DDT_CLASS_DITTO) to lowest
+ * (DDT_CLASS_UNIQUE) so that we may walk the DDT in that order.
+ *
+ * To prevent excess scrubbing, the scrub begins by walking the DDT
+ * to find all blocks with refcnt > 1, and scrubs each of these once.
+ * Since there are two replication classes which contain blocks with
+ * refcnt > 1, we scrub the highest replication class (DDT_CLASS_DITTO) first.
+ * Finally the top-down scrub begins, only visiting blocks with refcnt == 1.
+ *
+ * There would be nothing more to say if a block's refcnt couldn't change
+ * during a scrub, but of course it can so we must account for changes
+ * in a block's replication class.
+ *
+ * Here's an example of what can occur:
+ *
+ * If a block has refcnt > 1 during the DDT scrub phase, but has refcnt == 1
+ * when visited during the top-down scrub phase, it will be scrubbed twice.
+ * This negates our scrub optimization, but is otherwise harmless.
+ *
+ * If a block has refcnt == 1 during the DDT scrub phase, but has refcnt > 1
+ * on each visit during the top-down scrub phase, it will never be scrubbed.
+ * To catch this, ddt_sync_entry() notifies the scrub code whenever a block's
+ * reference class transitions to a higher level (i.e DDT_CLASS_UNIQUE to
+ * DDT_CLASS_DUPLICATE); if it transitions from refcnt == 1 to refcnt > 1
+ * while a scrub is in progress, it scrubs the block right then.
+ */
+static void
+dsl_scan_ddt(dsl_scan_t *scn, dmu_tx_t *tx)
+{
+	ddt_bookmark_t *ddb = &scn->scn_phys.scn_ddt_bookmark;
+	ddt_entry_t dde = { 0 };
+	int error;
+	uint64_t n = 0;
+
+	while ((error = ddt_walk(scn->scn_dp->dp_spa, ddb, &dde)) == 0) {
+		ddt_t *ddt;
+
+		if (ddb->ddb_class > scn->scn_phys.scn_ddt_class_max)
+			break;
+		dprintf("visiting ddb=%llu/%llu/%llu/%llx\n",
+		    (longlong_t)ddb->ddb_class,
+		    (longlong_t)ddb->ddb_type,
+		    (longlong_t)ddb->ddb_checksum,
+		    (longlong_t)ddb->ddb_cursor);
+
+		/* There should be no pending changes to the dedup table */
+		ddt = scn->scn_dp->dp_spa->spa_ddt[ddb->ddb_checksum];
+		ASSERT(avl_first(&ddt->ddt_tree) == NULL);
+
+		dsl_scan_ddt_entry(scn, ddb->ddb_checksum, &dde, tx);
+		n++;
+
+		if (dsl_scan_check_pause(scn, NULL))
+			break;
+	}
+
+	zfs_dbgmsg("scanned %llu ddt entries with class_max = %u; pausing=%u",
+	    (longlong_t)n, (int)scn->scn_phys.scn_ddt_class_max,
+	    (int)scn->scn_pausing);
+
+	ASSERT(error == 0 || error == ENOENT);
+	ASSERT(error != ENOENT ||
+	    ddb->ddb_class > scn->scn_phys.scn_ddt_class_max);
+}
+
+/* ARGSUSED */
+void
+dsl_scan_ddt_entry(dsl_scan_t *scn, enum zio_checksum checksum,
+    ddt_entry_t *dde, dmu_tx_t *tx)
+{
+	const ddt_key_t *ddk = &dde->dde_key;
+	ddt_phys_t *ddp = dde->dde_phys;
+	blkptr_t bp;
+	zbookmark_t zb = { 0 };
+
+	if (scn->scn_phys.scn_state != DSS_SCANNING)
+		return;
+
+	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
+		if (ddp->ddp_phys_birth == 0 ||
+		    ddp->ddp_phys_birth > scn->scn_phys.scn_cur_max_txg)
+			continue;
+		ddt_bp_create(checksum, ddk, ddp, &bp);
+
+		scn->scn_visited_this_txg++;
+		scan_funcs[scn->scn_phys.scn_func](scn->scn_dp, &bp, &zb);
+	}
+}
+
+static void
+dsl_scan_visit(dsl_scan_t *scn, dmu_tx_t *tx)
+{
+	dsl_pool_t *dp = scn->scn_dp;
+	zap_cursor_t zc;
+	zap_attribute_t za;
+
+	if (scn->scn_phys.scn_ddt_bookmark.ddb_class <=
+	    scn->scn_phys.scn_ddt_class_max) {
+		scn->scn_phys.scn_cur_min_txg = scn->scn_phys.scn_min_txg;
+		scn->scn_phys.scn_cur_max_txg = scn->scn_phys.scn_max_txg;
+		dsl_scan_ddt(scn, tx);
+		if (scn->scn_pausing)
+			return;
+	}
+
+	if (scn->scn_phys.scn_bookmark.zb_objset == DMU_META_OBJSET) {
+		/* First do the MOS & ORIGIN */
+
+		scn->scn_phys.scn_cur_min_txg = scn->scn_phys.scn_min_txg;
+		scn->scn_phys.scn_cur_max_txg = scn->scn_phys.scn_max_txg;
+		dsl_scan_visit_rootbp(scn, NULL,
+		    &dp->dp_meta_rootbp, tx);
+		spa_set_rootblkptr(dp->dp_spa, &dp->dp_meta_rootbp);
+		if (scn->scn_pausing)
+			return;
+
+		if (spa_version(dp->dp_spa) < SPA_VERSION_DSL_SCRUB) {
+			VERIFY(0 == dmu_objset_find_spa(dp->dp_spa,
+			    NULL, enqueue_cb, tx, DS_FIND_CHILDREN));
+		} else {
+			dsl_scan_visitds(scn,
+			    dp->dp_origin_snap->ds_object, tx);
+		}
+		ASSERT(!scn->scn_pausing);
+	} else if (scn->scn_phys.scn_bookmark.zb_objset !=
+	    ZB_DESTROYED_OBJSET) {
+		/*
+		 * If we were paused, continue from here.  Note if the
+		 * ds we were paused on was deleted, the zb_objset may
+		 * be -1, so we will skip this and find a new objset
+		 * below.
+		 */
+		dsl_scan_visitds(scn, scn->scn_phys.scn_bookmark.zb_objset, tx);
+		if (scn->scn_pausing)
+			return;
+	}
+
+	/*
+	 * In case we were paused right at the end of the ds, zero the
+	 * bookmark so we don't think that we're still trying to resume.
+	 */
+	bzero(&scn->scn_phys.scn_bookmark, sizeof (zbookmark_t));
+
+	/* keep pulling things out of the zap-object-as-queue */
+	while (zap_cursor_init(&zc, dp->dp_meta_objset,
+	    scn->scn_phys.scn_queue_obj),
+	    zap_cursor_retrieve(&zc, &za) == 0) {
+		dsl_dataset_t *ds;
+		uint64_t dsobj;
+
+		dsobj = strtonum(za.za_name, NULL);
+		VERIFY3U(0, ==, zap_remove_int(dp->dp_meta_objset,
+		    scn->scn_phys.scn_queue_obj, dsobj, tx));
+
+		/* Set up min/max txg */
+		VERIFY3U(0, ==, dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds));
+		if (za.za_first_integer != 0) {
+			scn->scn_phys.scn_cur_min_txg =
+			    MAX(scn->scn_phys.scn_min_txg,
+			    za.za_first_integer);
+		} else {
+			scn->scn_phys.scn_cur_min_txg =
+			    MAX(scn->scn_phys.scn_min_txg,
+			    ds->ds_phys->ds_prev_snap_txg);
+		}
+		scn->scn_phys.scn_cur_max_txg = dsl_scan_ds_maxtxg(ds);
+		dsl_dataset_rele(ds, FTAG);
+
+		dsl_scan_visitds(scn, dsobj, tx);
+		zap_cursor_fini(&zc);
+		if (scn->scn_pausing)
+			return;
+	}
+	zap_cursor_fini(&zc);
+}
+
+static int
+dsl_scan_free_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
+{
+	dsl_scan_t *scn = arg;
+	uint64_t elapsed_nanosecs;
+
+	elapsed_nanosecs = gethrtime() - scn->scn_sync_start_time;
+
+	if (elapsed_nanosecs / NANOSEC > zfs_txg_timeout ||
+	    (elapsed_nanosecs / MICROSEC > zfs_free_min_time_ms &&
+	    txg_sync_waiting(scn->scn_dp)) ||
+	    spa_shutting_down(scn->scn_dp->dp_spa))
+		return (ERESTART);
+
+	zio_nowait(zio_free_sync(scn->scn_zio_root, scn->scn_dp->dp_spa,
+	    dmu_tx_get_txg(tx), bp, 0));
+	dsl_dir_diduse_space(tx->tx_pool->dp_free_dir, DD_USED_HEAD,
+	    -bp_get_dsize_sync(scn->scn_dp->dp_spa, bp),
+	    -BP_GET_PSIZE(bp), -BP_GET_UCSIZE(bp), tx);
+	scn->scn_visited_this_txg++;
+	return (0);
+}
+
+boolean_t
+dsl_scan_active(dsl_scan_t *scn)
+{
+	spa_t *spa = scn->scn_dp->dp_spa;
+	uint64_t used = 0, comp, uncomp;
+
+	if (spa->spa_load_state != SPA_LOAD_NONE)
+		return (B_FALSE);
+	if (spa_shutting_down(spa))
+		return (B_FALSE);
+
+	if (scn->scn_phys.scn_state == DSS_SCANNING)
+		return (B_TRUE);
+
+	if (spa_version(scn->scn_dp->dp_spa) >= SPA_VERSION_DEADLISTS) {
+		(void) bpobj_space(&scn->scn_dp->dp_free_bpobj,
+		    &used, &comp, &uncomp);
+	}
+	return (used != 0);
+}
+
+void
+dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *tx)
+{
+	dsl_scan_t *scn = dp->dp_scan;
+	spa_t *spa = dp->dp_spa;
+	int err;
+
+	/*
+	 * Check for scn_restart_txg before checking spa_load_state, so
+	 * that we can restart an old-style scan while the pool is being
+	 * imported (see dsl_scan_init).
+	 */
+	if (scn->scn_restart_txg != 0 &&
+	    scn->scn_restart_txg <= tx->tx_txg) {
+		pool_scan_func_t func = POOL_SCAN_SCRUB;
+		dsl_scan_done(scn, B_FALSE, tx);
+		if (vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL))
+			func = POOL_SCAN_RESILVER;
+		zfs_dbgmsg("restarting scan func=%u txg=%llu",
+		    func, tx->tx_txg);
+		dsl_scan_setup_sync(scn, &func, tx);
+	}
+
+	if (!dsl_scan_active(scn) ||
+	    spa_sync_pass(dp->dp_spa) > 1)
+		return;
+
+	scn->scn_visited_this_txg = 0;
+	scn->scn_pausing = B_FALSE;
+	scn->scn_sync_start_time = gethrtime();
+	spa->spa_scrub_active = B_TRUE;
+
+	/*
+	 * First process the free list.  If we pause the free, don't do
+	 * any scanning.  This ensures that there is no free list when
+	 * we are scanning, so the scan code doesn't have to worry about
+	 * traversing it.
+	 */
+	if (spa_version(dp->dp_spa) >= SPA_VERSION_DEADLISTS) {
+		scn->scn_zio_root = zio_root(dp->dp_spa, NULL,
+		    NULL, ZIO_FLAG_MUSTSUCCEED);
+		err = bpobj_iterate(&dp->dp_free_bpobj,
+		    dsl_scan_free_cb, scn, tx);
+		VERIFY3U(0, ==, zio_wait(scn->scn_zio_root));
+		if (scn->scn_visited_this_txg) {
+			zfs_dbgmsg("freed %llu blocks in %llums from "
+			    "free_bpobj txg %llu",
+			    (longlong_t)scn->scn_visited_this_txg,
+			    (longlong_t)
+			    (gethrtime() - scn->scn_sync_start_time) / MICROSEC,
+			    (longlong_t)tx->tx_txg);
+			scn->scn_visited_this_txg = 0;
+			/*
+			 * Re-sync the ddt so that we can further modify
+			 * it when doing bprewrite.
+			 */
+			ddt_sync(spa, tx->tx_txg);
+		}
+		if (err == ERESTART)
+			return;
+	}
+
+	if (scn->scn_phys.scn_state != DSS_SCANNING)
+		return;
+
+	if (scn->scn_phys.scn_ddt_bookmark.ddb_class <=
+	    scn->scn_phys.scn_ddt_class_max) {
+		zfs_dbgmsg("doing scan sync txg %llu; "
+		    "ddt bm=%llu/%llu/%llu/%llx",
+		    (longlong_t)tx->tx_txg,
+		    (longlong_t)scn->scn_phys.scn_ddt_bookmark.ddb_class,
+		    (longlong_t)scn->scn_phys.scn_ddt_bookmark.ddb_type,
+		    (longlong_t)scn->scn_phys.scn_ddt_bookmark.ddb_checksum,
+		    (longlong_t)scn->scn_phys.scn_ddt_bookmark.ddb_cursor);
+		ASSERT(scn->scn_phys.scn_bookmark.zb_objset == 0);
+		ASSERT(scn->scn_phys.scn_bookmark.zb_object == 0);
+		ASSERT(scn->scn_phys.scn_bookmark.zb_level == 0);
+		ASSERT(scn->scn_phys.scn_bookmark.zb_blkid == 0);
+	} else {
+		zfs_dbgmsg("doing scan sync txg %llu; bm=%llu/%llu/%llu/%llu",
+		    (longlong_t)tx->tx_txg,
+		    (longlong_t)scn->scn_phys.scn_bookmark.zb_objset,
+		    (longlong_t)scn->scn_phys.scn_bookmark.zb_object,
+		    (longlong_t)scn->scn_phys.scn_bookmark.zb_level,
+		    (longlong_t)scn->scn_phys.scn_bookmark.zb_blkid);
+	}
+
+	scn->scn_zio_root = zio_root(dp->dp_spa, NULL,
+	    NULL, ZIO_FLAG_CANFAIL);
+	dsl_scan_visit(scn, tx);
+	(void) zio_wait(scn->scn_zio_root);
+	scn->scn_zio_root = NULL;
+
+	zfs_dbgmsg("visited %llu blocks in %llums",
+	    (longlong_t)scn->scn_visited_this_txg,
+	    (longlong_t)(gethrtime() - scn->scn_sync_start_time) / MICROSEC);
+
+	if (!scn->scn_pausing) {
+		/* finished with scan. */
+		zfs_dbgmsg("finished scan txg %llu", (longlong_t)tx->tx_txg);
+		dsl_scan_done(scn, B_TRUE, tx);
+	}
+
+	if (DSL_SCAN_IS_SCRUB_RESILVER(scn)) {
+		mutex_enter(&spa->spa_scrub_lock);
+		while (spa->spa_scrub_inflight > 0) {
+			cv_wait(&spa->spa_scrub_io_cv,
+			    &spa->spa_scrub_lock);
+		}
+		mutex_exit(&spa->spa_scrub_lock);
+	}
+
+	dsl_scan_sync_state(scn, tx);
+}
+
+/*
+ * This will start a new scan, or restart an existing one.
+ */
+void
+dsl_resilver_restart(dsl_pool_t *dp, uint64_t txg)
+{
+	if (txg == 0) {
+		dmu_tx_t *tx;
+		tx = dmu_tx_create_dd(dp->dp_mos_dir);
+		VERIFY(0 == dmu_tx_assign(tx, TXG_WAIT));
+
+		txg = dmu_tx_get_txg(tx);
+		dp->dp_scan->scn_restart_txg = txg;
+		dmu_tx_commit(tx);
+	} else {
+		dp->dp_scan->scn_restart_txg = txg;
+	}
+	zfs_dbgmsg("restarting resilver txg=%llu", txg);
+}
+
+boolean_t
+dsl_scan_resilvering(dsl_pool_t *dp)
+{
+	return (dp->dp_scan->scn_phys.scn_state == DSS_SCANNING &&
+	    dp->dp_scan->scn_phys.scn_func == POOL_SCAN_RESILVER);
+}
+
+/*
+ * scrub consumers
+ */
+
+static void
+count_block(zfs_all_blkstats_t *zab, const blkptr_t *bp)
+{
+	int i;
+
+	/*
+	 * If we resume after a reboot, zab will be NULL; don't record
+	 * incomplete stats in that case.
+	 */
+	if (zab == NULL)
+		return;
+
+	for (i = 0; i < 4; i++) {
+		int l = (i < 2) ? BP_GET_LEVEL(bp) : DN_MAX_LEVELS;
+		int t = (i & 1) ? BP_GET_TYPE(bp) : DMU_OT_TOTAL;
+		zfs_blkstat_t *zb = &zab->zab_type[l][t];
+		int equal;
+
+		zb->zb_count++;
+		zb->zb_asize += BP_GET_ASIZE(bp);
+		zb->zb_lsize += BP_GET_LSIZE(bp);
+		zb->zb_psize += BP_GET_PSIZE(bp);
+		zb->zb_gangs += BP_COUNT_GANG(bp);
+
+		switch (BP_GET_NDVAS(bp)) {
+		case 2:
+			if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
+			    DVA_GET_VDEV(&bp->blk_dva[1]))
+				zb->zb_ditto_2_of_2_samevdev++;
+			break;
+		case 3:
+			equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
+			    DVA_GET_VDEV(&bp->blk_dva[1])) +
+			    (DVA_GET_VDEV(&bp->blk_dva[0]) ==
+			    DVA_GET_VDEV(&bp->blk_dva[2])) +
+			    (DVA_GET_VDEV(&bp->blk_dva[1]) ==
+			    DVA_GET_VDEV(&bp->blk_dva[2]));
+			if (equal == 1)
+				zb->zb_ditto_2_of_3_samevdev++;
+			else if (equal == 3)
+				zb->zb_ditto_3_of_3_samevdev++;
+			break;
+		}
+	}
+}
+
+static void
+dsl_scan_scrub_done(zio_t *zio)
+{
+	spa_t *spa = zio->io_spa;
+
+	zio_data_buf_free(zio->io_data, zio->io_size);
+
+	mutex_enter(&spa->spa_scrub_lock);
+	spa->spa_scrub_inflight--;
+	cv_broadcast(&spa->spa_scrub_io_cv);
+
+	if (zio->io_error && (zio->io_error != ECKSUM ||
+	    !(zio->io_flags & ZIO_FLAG_SPECULATIVE))) {
+		spa->spa_dsl_pool->dp_scan->scn_phys.scn_errors++;
+	}
+	mutex_exit(&spa->spa_scrub_lock);
+}
+
+static int
+dsl_scan_scrub_cb(dsl_pool_t *dp,
+    const blkptr_t *bp, const zbookmark_t *zb)
+{
+	dsl_scan_t *scn = dp->dp_scan;
+	size_t size = BP_GET_PSIZE(bp);
+	spa_t *spa = dp->dp_spa;
+	uint64_t phys_birth = BP_PHYSICAL_BIRTH(bp);
+	boolean_t needs_io;
+	int zio_flags = ZIO_FLAG_SCAN_THREAD | ZIO_FLAG_RAW | ZIO_FLAG_CANFAIL;
+	int zio_priority;
+	int scan_delay = 0;
+
+	if (phys_birth <= scn->scn_phys.scn_min_txg ||
+	    phys_birth >= scn->scn_phys.scn_max_txg)
+		return (0);
+
+	count_block(dp->dp_blkstats, bp);
+
+	ASSERT(DSL_SCAN_IS_SCRUB_RESILVER(scn));
+	if (scn->scn_phys.scn_func == POOL_SCAN_SCRUB) {
+		zio_flags |= ZIO_FLAG_SCRUB;
+		zio_priority = ZIO_PRIORITY_SCRUB;
+		needs_io = B_TRUE;
+		scan_delay = zfs_scrub_delay;
+	} else if (scn->scn_phys.scn_func == POOL_SCAN_RESILVER) {
+		zio_flags |= ZIO_FLAG_RESILVER;
+		zio_priority = ZIO_PRIORITY_RESILVER;
+		needs_io = B_FALSE;
+		scan_delay = zfs_resilver_delay;
+	}
+
+	/* If it's an intent log block, failure is expected. */
+	if (zb->zb_level == ZB_ZIL_LEVEL)
+		zio_flags |= ZIO_FLAG_SPECULATIVE;
+
+	for (int d = 0; d < BP_GET_NDVAS(bp); d++) {
+		vdev_t *vd = vdev_lookup_top(spa,
+		    DVA_GET_VDEV(&bp->blk_dva[d]));
+
+		/*
+		 * Keep track of how much data we've examined so that
+		 * zpool(1M) status can make useful progress reports.
+		 */
+		scn->scn_phys.scn_examined += DVA_GET_ASIZE(&bp->blk_dva[d]);
+		spa->spa_scan_pass_exam += DVA_GET_ASIZE(&bp->blk_dva[d]);
+
+		/* if it's a resilver, this may not be in the target range */
+		if (!needs_io) {
+			if (DVA_GET_GANG(&bp->blk_dva[d])) {
+				/*
+				 * Gang members may be spread across multiple
+				 * vdevs, so the best estimate we have is the
+				 * scrub range, which has already been checked.
+				 * XXX -- it would be better to change our
+				 * allocation policy to ensure that all
+				 * gang members reside on the same vdev.
+				 */
+				needs_io = B_TRUE;
+			} else {
+				needs_io = vdev_dtl_contains(vd, DTL_PARTIAL,
+				    phys_birth, 1);
+			}
+		}
+	}
+
+	if (needs_io && !zfs_no_scrub_io) {
+		vdev_t *rvd = spa->spa_root_vdev;
+		uint64_t maxinflight = rvd->vdev_children * zfs_top_maxinflight;
+		void *data = zio_data_buf_alloc(size);
+
+		mutex_enter(&spa->spa_scrub_lock);
+		while (spa->spa_scrub_inflight >= maxinflight)
+			cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
+		spa->spa_scrub_inflight++;
+		mutex_exit(&spa->spa_scrub_lock);
+
+		/*
+		 * If we're seeing recent (zfs_scan_idle) "important" I/Os
+		 * then throttle our workload to limit the impact of a scan.
+		 */
+		if (ddi_get_lbolt64() - spa->spa_last_io <= zfs_scan_idle)
+			delay(scan_delay);
+
+		zio_nowait(zio_read(NULL, spa, bp, data, size,
+		    dsl_scan_scrub_done, NULL, zio_priority,
+		    zio_flags, zb));
+	}
+
+	/* do not relocate this block */
+	return (0);
+}
+
+int
+dsl_scan(dsl_pool_t *dp, pool_scan_func_t func)
+{
+	spa_t *spa = dp->dp_spa;
+
+	/*
+	 * Purge all vdev caches and probe all devices.  We do this here
+	 * rather than in sync context because this requires a writer lock
+	 * on the spa_config lock, which we can't do from sync context.  The
+	 * spa_scrub_reopen flag indicates that vdev_open() should not
+	 * attempt to start another scrub.
+	 */
+	spa_vdev_state_enter(spa, SCL_NONE);
+	spa->spa_scrub_reopen = B_TRUE;
+	vdev_reopen(spa->spa_root_vdev);
+	spa->spa_scrub_reopen = B_FALSE;
+	(void) spa_vdev_state_exit(spa, NULL, 0);
+
+	return (dsl_sync_task_do(dp, dsl_scan_setup_check,
+	    dsl_scan_setup_sync, dp->dp_scan, &func, 0));
+}
diff --git a/uts/common/fs/zfs/dsl_synctask.c b/uts/common/fs/zfs/dsl_synctask.c
new file mode 100644
index 000000000000..b0818ce274d4
--- /dev/null
+++ b/uts/common/fs/zfs/dsl_synctask.c
@@ -0,0 +1,240 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/dmu.h>
+#include <sys/dmu_tx.h>
+#include <sys/dsl_pool.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_synctask.h>
+#include <sys/metaslab.h>
+
+#define	DST_AVG_BLKSHIFT 14
+
+/* ARGSUSED */
+static int
+dsl_null_checkfunc(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	return (0);
+}
+
+dsl_sync_task_group_t *
+dsl_sync_task_group_create(dsl_pool_t *dp)
+{
+	dsl_sync_task_group_t *dstg;
+
+	dstg = kmem_zalloc(sizeof (dsl_sync_task_group_t), KM_SLEEP);
+	list_create(&dstg->dstg_tasks, sizeof (dsl_sync_task_t),
+	    offsetof(dsl_sync_task_t, dst_node));
+	dstg->dstg_pool = dp;
+
+	return (dstg);
+}
+
+void
+dsl_sync_task_create(dsl_sync_task_group_t *dstg,
+    dsl_checkfunc_t *checkfunc, dsl_syncfunc_t *syncfunc,
+    void *arg1, void *arg2, int blocks_modified)
+{
+	dsl_sync_task_t *dst;
+
+	if (checkfunc == NULL)
+		checkfunc = dsl_null_checkfunc;
+	dst = kmem_zalloc(sizeof (dsl_sync_task_t), KM_SLEEP);
+	dst->dst_checkfunc = checkfunc;
+	dst->dst_syncfunc = syncfunc;
+	dst->dst_arg1 = arg1;
+	dst->dst_arg2 = arg2;
+	list_insert_tail(&dstg->dstg_tasks, dst);
+
+	dstg->dstg_space += blocks_modified << DST_AVG_BLKSHIFT;
+}
+
+int
+dsl_sync_task_group_wait(dsl_sync_task_group_t *dstg)
+{
+	dmu_tx_t *tx;
+	uint64_t txg;
+	dsl_sync_task_t *dst;
+
+top:
+	tx = dmu_tx_create_dd(dstg->dstg_pool->dp_mos_dir);
+	VERIFY(0 == dmu_tx_assign(tx, TXG_WAIT));
+
+	txg = dmu_tx_get_txg(tx);
+
+	/* Do a preliminary error check. */
+	dstg->dstg_err = 0;
+	rw_enter(&dstg->dstg_pool->dp_config_rwlock, RW_READER);
+	for (dst = list_head(&dstg->dstg_tasks); dst;
+	    dst = list_next(&dstg->dstg_tasks, dst)) {
+#ifdef ZFS_DEBUG
+		/*
+		 * Only check half the time, otherwise, the sync-context
+		 * check will almost never fail.
+		 */
+		if (spa_get_random(2) == 0)
+			continue;
+#endif
+		dst->dst_err =
+		    dst->dst_checkfunc(dst->dst_arg1, dst->dst_arg2, tx);
+		if (dst->dst_err)
+			dstg->dstg_err = dst->dst_err;
+	}
+	rw_exit(&dstg->dstg_pool->dp_config_rwlock);
+
+	if (dstg->dstg_err) {
+		dmu_tx_commit(tx);
+		return (dstg->dstg_err);
+	}
+
+	/*
+	 * We don't generally have many sync tasks, so pay the price of
+	 * add_tail to get the tasks executed in the right order.
+	 */
+	VERIFY(0 == txg_list_add_tail(&dstg->dstg_pool->dp_sync_tasks,
+	    dstg, txg));
+
+	dmu_tx_commit(tx);
+
+	txg_wait_synced(dstg->dstg_pool, txg);
+
+	if (dstg->dstg_err == EAGAIN) {
+		txg_wait_synced(dstg->dstg_pool, txg + TXG_DEFER_SIZE);
+		goto top;
+	}
+
+	return (dstg->dstg_err);
+}
+
+void
+dsl_sync_task_group_nowait(dsl_sync_task_group_t *dstg, dmu_tx_t *tx)
+{
+	uint64_t txg;
+
+	dstg->dstg_nowaiter = B_TRUE;
+	txg = dmu_tx_get_txg(tx);
+	/*
+	 * We don't generally have many sync tasks, so pay the price of
+	 * add_tail to get the tasks executed in the right order.
+	 */
+	VERIFY(0 == txg_list_add_tail(&dstg->dstg_pool->dp_sync_tasks,
+	    dstg, txg));
+}
+
+void
+dsl_sync_task_group_destroy(dsl_sync_task_group_t *dstg)
+{
+	dsl_sync_task_t *dst;
+
+	while (dst = list_head(&dstg->dstg_tasks)) {
+		list_remove(&dstg->dstg_tasks, dst);
+		kmem_free(dst, sizeof (dsl_sync_task_t));
+	}
+	kmem_free(dstg, sizeof (dsl_sync_task_group_t));
+}
+
+void
+dsl_sync_task_group_sync(dsl_sync_task_group_t *dstg, dmu_tx_t *tx)
+{
+	dsl_sync_task_t *dst;
+	dsl_pool_t *dp = dstg->dstg_pool;
+	uint64_t quota, used;
+
+	ASSERT3U(dstg->dstg_err, ==, 0);
+
+	/*
+	 * Check for sufficient space.  We just check against what's
+	 * on-disk; we don't want any in-flight accounting to get in our
+	 * way, because open context may have already used up various
+	 * in-core limits (arc_tempreserve, dsl_pool_tempreserve).
+	 */
+	quota = dsl_pool_adjustedsize(dp, B_FALSE) -
+	    metaslab_class_get_deferred(spa_normal_class(dp->dp_spa));
+	used = dp->dp_root_dir->dd_phys->dd_used_bytes;
+	/* MOS space is triple-dittoed, so we multiply by 3. */
+	if (dstg->dstg_space > 0 && used + dstg->dstg_space * 3 > quota) {
+		dstg->dstg_err = ENOSPC;
+		return;
+	}
+
+	/*
+	 * Check for errors by calling checkfuncs.
+	 */
+	rw_enter(&dp->dp_config_rwlock, RW_WRITER);
+	for (dst = list_head(&dstg->dstg_tasks); dst;
+	    dst = list_next(&dstg->dstg_tasks, dst)) {
+		dst->dst_err =
+		    dst->dst_checkfunc(dst->dst_arg1, dst->dst_arg2, tx);
+		if (dst->dst_err)
+			dstg->dstg_err = dst->dst_err;
+	}
+
+	if (dstg->dstg_err == 0) {
+		/*
+		 * Execute sync tasks.
+		 */
+		for (dst = list_head(&dstg->dstg_tasks); dst;
+		    dst = list_next(&dstg->dstg_tasks, dst)) {
+			dst->dst_syncfunc(dst->dst_arg1, dst->dst_arg2, tx);
+		}
+	}
+	rw_exit(&dp->dp_config_rwlock);
+
+	if (dstg->dstg_nowaiter)
+		dsl_sync_task_group_destroy(dstg);
+}
+
+int
+dsl_sync_task_do(dsl_pool_t *dp,
+    dsl_checkfunc_t *checkfunc, dsl_syncfunc_t *syncfunc,
+    void *arg1, void *arg2, int blocks_modified)
+{
+	dsl_sync_task_group_t *dstg;
+	int err;
+
+	ASSERT(spa_writeable(dp->dp_spa));
+
+	dstg = dsl_sync_task_group_create(dp);
+	dsl_sync_task_create(dstg, checkfunc, syncfunc,
+	    arg1, arg2, blocks_modified);
+	err = dsl_sync_task_group_wait(dstg);
+	dsl_sync_task_group_destroy(dstg);
+	return (err);
+}
+
+void
+dsl_sync_task_do_nowait(dsl_pool_t *dp,
+    dsl_checkfunc_t *checkfunc, dsl_syncfunc_t *syncfunc,
+    void *arg1, void *arg2, int blocks_modified, dmu_tx_t *tx)
+{
+	dsl_sync_task_group_t *dstg;
+
+	if (!spa_writeable(dp->dp_spa))
+		return;
+
+	dstg = dsl_sync_task_group_create(dp);
+	dsl_sync_task_create(dstg, checkfunc, syncfunc,
+	    arg1, arg2, blocks_modified);
+	dsl_sync_task_group_nowait(dstg, tx);
+}
diff --git a/uts/common/fs/zfs/gzip.c b/uts/common/fs/zfs/gzip.c
new file mode 100644
index 000000000000..b257d4af753c
--- /dev/null
+++ b/uts/common/fs/zfs/gzip.c
@@ -0,0 +1,69 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/debug.h>
+#include <sys/types.h>
+#include <sys/zmod.h>
+
+#ifdef _KERNEL
+#include <sys/systm.h>
+#else
+#include <strings.h>
+#endif
+
+size_t
+gzip_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
+{
+	size_t dstlen = d_len;
+
+	ASSERT(d_len <= s_len);
+
+	if (z_compress_level(d_start, &dstlen, s_start, s_len, n) != Z_OK) {
+		if (d_len != s_len)
+			return (s_len);
+
+		bcopy(s_start, d_start, s_len);
+		return (s_len);
+	}
+
+	return (dstlen);
+}
+
+/*ARGSUSED*/
+int
+gzip_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
+{
+	size_t dstlen = d_len;
+
+	ASSERT(d_len >= s_len);
+
+	if (z_uncompress(d_start, &dstlen, s_start, s_len) != Z_OK)
+		return (-1);
+
+	return (0);
+}
diff --git a/uts/common/fs/zfs/lzjb.c b/uts/common/fs/zfs/lzjb.c
new file mode 100644
index 000000000000..ab3de51b7259
--- /dev/null
+++ b/uts/common/fs/zfs/lzjb.c
@@ -0,0 +1,123 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * We keep our own copy of this algorithm for 3 main reasons:
+ *	1. If we didn't, anyone modifying common/os/compress.c would
+ *         directly break our on disk format
+ *	2. Our version of lzjb does not have a number of checks that the
+ *         common/os version needs and uses
+ *	3. We initialize the lempel to ensure deterministic results,
+ *	   so that identical blocks can always be deduplicated.
+ * In particular, we are adding the "feature" that compress() can
+ * take a destination buffer size and returns the compressed length, or the
+ * source length if compression would overflow the destination buffer.
+ */
+
+#include <sys/types.h>
+
+#define	MATCH_BITS	6
+#define	MATCH_MIN	3
+#define	MATCH_MAX	((1 << MATCH_BITS) + (MATCH_MIN - 1))
+#define	OFFSET_MASK	((1 << (16 - MATCH_BITS)) - 1)
+#define	LEMPEL_SIZE	1024
+
+/*ARGSUSED*/
+size_t
+lzjb_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
+{
+	uchar_t *src = s_start;
+	uchar_t *dst = d_start;
+	uchar_t *cpy, *copymap;
+	int copymask = 1 << (NBBY - 1);
+	int mlen, offset, hash;
+	uint16_t *hp;
+	uint16_t lempel[LEMPEL_SIZE] = { 0 };
+
+	while (src < (uchar_t *)s_start + s_len) {
+		if ((copymask <<= 1) == (1 << NBBY)) {
+			if (dst >= (uchar_t *)d_start + d_len - 1 - 2 * NBBY)
+				return (s_len);
+			copymask = 1;
+			copymap = dst;
+			*dst++ = 0;
+		}
+		if (src > (uchar_t *)s_start + s_len - MATCH_MAX) {
+			*dst++ = *src++;
+			continue;
+		}
+		hash = (src[0] << 16) + (src[1] << 8) + src[2];
+		hash += hash >> 9;
+		hash += hash >> 5;
+		hp = &lempel[hash & (LEMPEL_SIZE - 1)];
+		offset = (intptr_t)(src - *hp) & OFFSET_MASK;
+		*hp = (uint16_t)(uintptr_t)src;
+		cpy = src - offset;
+		if (cpy >= (uchar_t *)s_start && cpy != src &&
+		    src[0] == cpy[0] && src[1] == cpy[1] && src[2] == cpy[2]) {
+			*copymap |= copymask;
+			for (mlen = MATCH_MIN; mlen < MATCH_MAX; mlen++)
+				if (src[mlen] != cpy[mlen])
+					break;
+			*dst++ = ((mlen - MATCH_MIN) << (NBBY - MATCH_BITS)) |
+			    (offset >> NBBY);
+			*dst++ = (uchar_t)offset;
+			src += mlen;
+		} else {
+			*dst++ = *src++;
+		}
+	}
+	return (dst - (uchar_t *)d_start);
+}
+
+/*ARGSUSED*/
+int
+lzjb_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
+{
+	uchar_t *src = s_start;
+	uchar_t *dst = d_start;
+	uchar_t *d_end = (uchar_t *)d_start + d_len;
+	uchar_t *cpy, copymap;
+	int copymask = 1 << (NBBY - 1);
+
+	while (dst < d_end) {
+		if ((copymask <<= 1) == (1 << NBBY)) {
+			copymask = 1;
+			copymap = *src++;
+		}
+		if (copymap & copymask) {
+			int mlen = (src[0] >> (NBBY - MATCH_BITS)) + MATCH_MIN;
+			int offset = ((src[0] << NBBY) | src[1]) & OFFSET_MASK;
+			src += 2;
+			if ((cpy = dst - offset) < (uchar_t *)d_start)
+				return (-1);
+			while (--mlen >= 0 && dst < d_end)
+				*dst++ = *cpy++;
+		} else {
+			*dst++ = *src++;
+		}
+	}
+	return (0);
+}
diff --git a/uts/common/fs/zfs/metaslab.c b/uts/common/fs/zfs/metaslab.c
new file mode 100644
index 000000000000..17b4b12c4ee4
--- /dev/null
+++ b/uts/common/fs/zfs/metaslab.c
@@ -0,0 +1,1604 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/dmu.h>
+#include <sys/dmu_tx.h>
+#include <sys/space_map.h>
+#include <sys/metaslab_impl.h>
+#include <sys/vdev_impl.h>
+#include <sys/zio.h>
+
+uint64_t metaslab_aliquot = 512ULL << 10;
+uint64_t metaslab_gang_bang = SPA_MAXBLOCKSIZE + 1;	/* force gang blocks */
+
+/*
+ * Metaslab debugging: when set, keeps all space maps in core to verify frees.
+ */
+static int metaslab_debug = 0;
+
+/*
+ * Minimum size which forces the dynamic allocator to change
+ * it's allocation strategy.  Once the space map cannot satisfy
+ * an allocation of this size then it switches to using more
+ * aggressive strategy (i.e search by size rather than offset).
+ */
+uint64_t metaslab_df_alloc_threshold = SPA_MAXBLOCKSIZE;
+
+/*
+ * The minimum free space, in percent, which must be available
+ * in a space map to continue allocations in a first-fit fashion.
+ * Once the space_map's free space drops below this level we dynamically
+ * switch to using best-fit allocations.
+ */
+int metaslab_df_free_pct = 4;
+
+/*
+ * A metaslab is considered "free" if it contains a contiguous
+ * segment which is greater than metaslab_min_alloc_size.
+ */
+uint64_t metaslab_min_alloc_size = DMU_MAX_ACCESS;
+
+/*
+ * Max number of space_maps to prefetch.
+ */
+int metaslab_prefetch_limit = SPA_DVAS_PER_BP;
+
+/*
+ * Percentage bonus multiplier for metaslabs that are in the bonus area.
+ */
+int metaslab_smo_bonus_pct = 150;
+
+/*
+ * ==========================================================================
+ * Metaslab classes
+ * ==========================================================================
+ */
+metaslab_class_t *
+metaslab_class_create(spa_t *spa, space_map_ops_t *ops)
+{
+	metaslab_class_t *mc;
+
+	mc = kmem_zalloc(sizeof (metaslab_class_t), KM_SLEEP);
+
+	mc->mc_spa = spa;
+	mc->mc_rotor = NULL;
+	mc->mc_ops = ops;
+
+	return (mc);
+}
+
+void
+metaslab_class_destroy(metaslab_class_t *mc)
+{
+	ASSERT(mc->mc_rotor == NULL);
+	ASSERT(mc->mc_alloc == 0);
+	ASSERT(mc->mc_deferred == 0);
+	ASSERT(mc->mc_space == 0);
+	ASSERT(mc->mc_dspace == 0);
+
+	kmem_free(mc, sizeof (metaslab_class_t));
+}
+
+int
+metaslab_class_validate(metaslab_class_t *mc)
+{
+	metaslab_group_t *mg;
+	vdev_t *vd;
+
+	/*
+	 * Must hold one of the spa_config locks.
+	 */
+	ASSERT(spa_config_held(mc->mc_spa, SCL_ALL, RW_READER) ||
+	    spa_config_held(mc->mc_spa, SCL_ALL, RW_WRITER));
+
+	if ((mg = mc->mc_rotor) == NULL)
+		return (0);
+
+	do {
+		vd = mg->mg_vd;
+		ASSERT(vd->vdev_mg != NULL);
+		ASSERT3P(vd->vdev_top, ==, vd);
+		ASSERT3P(mg->mg_class, ==, mc);
+		ASSERT3P(vd->vdev_ops, !=, &vdev_hole_ops);
+	} while ((mg = mg->mg_next) != mc->mc_rotor);
+
+	return (0);
+}
+
+void
+metaslab_class_space_update(metaslab_class_t *mc, int64_t alloc_delta,
+    int64_t defer_delta, int64_t space_delta, int64_t dspace_delta)
+{
+	atomic_add_64(&mc->mc_alloc, alloc_delta);
+	atomic_add_64(&mc->mc_deferred, defer_delta);
+	atomic_add_64(&mc->mc_space, space_delta);
+	atomic_add_64(&mc->mc_dspace, dspace_delta);
+}
+
+uint64_t
+metaslab_class_get_alloc(metaslab_class_t *mc)
+{
+	return (mc->mc_alloc);
+}
+
+uint64_t
+metaslab_class_get_deferred(metaslab_class_t *mc)
+{
+	return (mc->mc_deferred);
+}
+
+uint64_t
+metaslab_class_get_space(metaslab_class_t *mc)
+{
+	return (mc->mc_space);
+}
+
+uint64_t
+metaslab_class_get_dspace(metaslab_class_t *mc)
+{
+	return (spa_deflate(mc->mc_spa) ? mc->mc_dspace : mc->mc_space);
+}
+
+/*
+ * ==========================================================================
+ * Metaslab groups
+ * ==========================================================================
+ */
+static int
+metaslab_compare(const void *x1, const void *x2)
+{
+	const metaslab_t *m1 = x1;
+	const metaslab_t *m2 = x2;
+
+	if (m1->ms_weight < m2->ms_weight)
+		return (1);
+	if (m1->ms_weight > m2->ms_weight)
+		return (-1);
+
+	/*
+	 * If the weights are identical, use the offset to force uniqueness.
+	 */
+	if (m1->ms_map.sm_start < m2->ms_map.sm_start)
+		return (-1);
+	if (m1->ms_map.sm_start > m2->ms_map.sm_start)
+		return (1);
+
+	ASSERT3P(m1, ==, m2);
+
+	return (0);
+}
+
+metaslab_group_t *
+metaslab_group_create(metaslab_class_t *mc, vdev_t *vd)
+{
+	metaslab_group_t *mg;
+
+	mg = kmem_zalloc(sizeof (metaslab_group_t), KM_SLEEP);
+	mutex_init(&mg->mg_lock, NULL, MUTEX_DEFAULT, NULL);
+	avl_create(&mg->mg_metaslab_tree, metaslab_compare,
+	    sizeof (metaslab_t), offsetof(struct metaslab, ms_group_node));
+	mg->mg_vd = vd;
+	mg->mg_class = mc;
+	mg->mg_activation_count = 0;
+
+	return (mg);
+}
+
+void
+metaslab_group_destroy(metaslab_group_t *mg)
+{
+	ASSERT(mg->mg_prev == NULL);
+	ASSERT(mg->mg_next == NULL);
+	/*
+	 * We may have gone below zero with the activation count
+	 * either because we never activated in the first place or
+	 * because we're done, and possibly removing the vdev.
+	 */
+	ASSERT(mg->mg_activation_count <= 0);
+
+	avl_destroy(&mg->mg_metaslab_tree);
+	mutex_destroy(&mg->mg_lock);
+	kmem_free(mg, sizeof (metaslab_group_t));
+}
+
+void
+metaslab_group_activate(metaslab_group_t *mg)
+{
+	metaslab_class_t *mc = mg->mg_class;
+	metaslab_group_t *mgprev, *mgnext;
+
+	ASSERT(spa_config_held(mc->mc_spa, SCL_ALLOC, RW_WRITER));
+
+	ASSERT(mc->mc_rotor != mg);
+	ASSERT(mg->mg_prev == NULL);
+	ASSERT(mg->mg_next == NULL);
+	ASSERT(mg->mg_activation_count <= 0);
+
+	if (++mg->mg_activation_count <= 0)
+		return;
+
+	mg->mg_aliquot = metaslab_aliquot * MAX(1, mg->mg_vd->vdev_children);
+
+	if ((mgprev = mc->mc_rotor) == NULL) {
+		mg->mg_prev = mg;
+		mg->mg_next = mg;
+	} else {
+		mgnext = mgprev->mg_next;
+		mg->mg_prev = mgprev;
+		mg->mg_next = mgnext;
+		mgprev->mg_next = mg;
+		mgnext->mg_prev = mg;
+	}
+	mc->mc_rotor = mg;
+}
+
+void
+metaslab_group_passivate(metaslab_group_t *mg)
+{
+	metaslab_class_t *mc = mg->mg_class;
+	metaslab_group_t *mgprev, *mgnext;
+
+	ASSERT(spa_config_held(mc->mc_spa, SCL_ALLOC, RW_WRITER));
+
+	if (--mg->mg_activation_count != 0) {
+		ASSERT(mc->mc_rotor != mg);
+		ASSERT(mg->mg_prev == NULL);
+		ASSERT(mg->mg_next == NULL);
+		ASSERT(mg->mg_activation_count < 0);
+		return;
+	}
+
+	mgprev = mg->mg_prev;
+	mgnext = mg->mg_next;
+
+	if (mg == mgnext) {
+		mc->mc_rotor = NULL;
+	} else {
+		mc->mc_rotor = mgnext;
+		mgprev->mg_next = mgnext;
+		mgnext->mg_prev = mgprev;
+	}
+
+	mg->mg_prev = NULL;
+	mg->mg_next = NULL;
+}
+
+static void
+metaslab_group_add(metaslab_group_t *mg, metaslab_t *msp)
+{
+	mutex_enter(&mg->mg_lock);
+	ASSERT(msp->ms_group == NULL);
+	msp->ms_group = mg;
+	msp->ms_weight = 0;
+	avl_add(&mg->mg_metaslab_tree, msp);
+	mutex_exit(&mg->mg_lock);
+}
+
+static void
+metaslab_group_remove(metaslab_group_t *mg, metaslab_t *msp)
+{
+	mutex_enter(&mg->mg_lock);
+	ASSERT(msp->ms_group == mg);
+	avl_remove(&mg->mg_metaslab_tree, msp);
+	msp->ms_group = NULL;
+	mutex_exit(&mg->mg_lock);
+}
+
+static void
+metaslab_group_sort(metaslab_group_t *mg, metaslab_t *msp, uint64_t weight)
+{
+	/*
+	 * Although in principle the weight can be any value, in
+	 * practice we do not use values in the range [1, 510].
+	 */
+	ASSERT(weight >= SPA_MINBLOCKSIZE-1 || weight == 0);
+	ASSERT(MUTEX_HELD(&msp->ms_lock));
+
+	mutex_enter(&mg->mg_lock);
+	ASSERT(msp->ms_group == mg);
+	avl_remove(&mg->mg_metaslab_tree, msp);
+	msp->ms_weight = weight;
+	avl_add(&mg->mg_metaslab_tree, msp);
+	mutex_exit(&mg->mg_lock);
+}
+
+/*
+ * ==========================================================================
+ * Common allocator routines
+ * ==========================================================================
+ */
+static int
+metaslab_segsize_compare(const void *x1, const void *x2)
+{
+	const space_seg_t *s1 = x1;
+	const space_seg_t *s2 = x2;
+	uint64_t ss_size1 = s1->ss_end - s1->ss_start;
+	uint64_t ss_size2 = s2->ss_end - s2->ss_start;
+
+	if (ss_size1 < ss_size2)
+		return (-1);
+	if (ss_size1 > ss_size2)
+		return (1);
+
+	if (s1->ss_start < s2->ss_start)
+		return (-1);
+	if (s1->ss_start > s2->ss_start)
+		return (1);
+
+	return (0);
+}
+
+/*
+ * This is a helper function that can be used by the allocator to find
+ * a suitable block to allocate. This will search the specified AVL
+ * tree looking for a block that matches the specified criteria.
+ */
+static uint64_t
+metaslab_block_picker(avl_tree_t *t, uint64_t *cursor, uint64_t size,
+    uint64_t align)
+{
+	space_seg_t *ss, ssearch;
+	avl_index_t where;
+
+	ssearch.ss_start = *cursor;
+	ssearch.ss_end = *cursor + size;
+
+	ss = avl_find(t, &ssearch, &where);
+	if (ss == NULL)
+		ss = avl_nearest(t, where, AVL_AFTER);
+
+	while (ss != NULL) {
+		uint64_t offset = P2ROUNDUP(ss->ss_start, align);
+
+		if (offset + size <= ss->ss_end) {
+			*cursor = offset + size;
+			return (offset);
+		}
+		ss = AVL_NEXT(t, ss);
+	}
+
+	/*
+	 * If we know we've searched the whole map (*cursor == 0), give up.
+	 * Otherwise, reset the cursor to the beginning and try again.
+	 */
+	if (*cursor == 0)
+		return (-1ULL);
+
+	*cursor = 0;
+	return (metaslab_block_picker(t, cursor, size, align));
+}
+
+static void
+metaslab_pp_load(space_map_t *sm)
+{
+	space_seg_t *ss;
+
+	ASSERT(sm->sm_ppd == NULL);
+	sm->sm_ppd = kmem_zalloc(64 * sizeof (uint64_t), KM_SLEEP);
+
+	sm->sm_pp_root = kmem_alloc(sizeof (avl_tree_t), KM_SLEEP);
+	avl_create(sm->sm_pp_root, metaslab_segsize_compare,
+	    sizeof (space_seg_t), offsetof(struct space_seg, ss_pp_node));
+
+	for (ss = avl_first(&sm->sm_root); ss; ss = AVL_NEXT(&sm->sm_root, ss))
+		avl_add(sm->sm_pp_root, ss);
+}
+
+static void
+metaslab_pp_unload(space_map_t *sm)
+{
+	void *cookie = NULL;
+
+	kmem_free(sm->sm_ppd, 64 * sizeof (uint64_t));
+	sm->sm_ppd = NULL;
+
+	while (avl_destroy_nodes(sm->sm_pp_root, &cookie) != NULL) {
+		/* tear down the tree */
+	}
+
+	avl_destroy(sm->sm_pp_root);
+	kmem_free(sm->sm_pp_root, sizeof (avl_tree_t));
+	sm->sm_pp_root = NULL;
+}
+
+/* ARGSUSED */
+static void
+metaslab_pp_claim(space_map_t *sm, uint64_t start, uint64_t size)
+{
+	/* No need to update cursor */
+}
+
+/* ARGSUSED */
+static void
+metaslab_pp_free(space_map_t *sm, uint64_t start, uint64_t size)
+{
+	/* No need to update cursor */
+}
+
+/*
+ * Return the maximum contiguous segment within the metaslab.
+ */
+uint64_t
+metaslab_pp_maxsize(space_map_t *sm)
+{
+	avl_tree_t *t = sm->sm_pp_root;
+	space_seg_t *ss;
+
+	if (t == NULL || (ss = avl_last(t)) == NULL)
+		return (0ULL);
+
+	return (ss->ss_end - ss->ss_start);
+}
+
+/*
+ * ==========================================================================
+ * The first-fit block allocator
+ * ==========================================================================
+ */
+static uint64_t
+metaslab_ff_alloc(space_map_t *sm, uint64_t size)
+{
+	avl_tree_t *t = &sm->sm_root;
+	uint64_t align = size & -size;
+	uint64_t *cursor = (uint64_t *)sm->sm_ppd + highbit(align) - 1;
+
+	return (metaslab_block_picker(t, cursor, size, align));
+}
+
+/* ARGSUSED */
+boolean_t
+metaslab_ff_fragmented(space_map_t *sm)
+{
+	return (B_TRUE);
+}
+
+static space_map_ops_t metaslab_ff_ops = {
+	metaslab_pp_load,
+	metaslab_pp_unload,
+	metaslab_ff_alloc,
+	metaslab_pp_claim,
+	metaslab_pp_free,
+	metaslab_pp_maxsize,
+	metaslab_ff_fragmented
+};
+
+/*
+ * ==========================================================================
+ * Dynamic block allocator -
+ * Uses the first fit allocation scheme until space get low and then
+ * adjusts to a best fit allocation method. Uses metaslab_df_alloc_threshold
+ * and metaslab_df_free_pct to determine when to switch the allocation scheme.
+ * ==========================================================================
+ */
+static uint64_t
+metaslab_df_alloc(space_map_t *sm, uint64_t size)
+{
+	avl_tree_t *t = &sm->sm_root;
+	uint64_t align = size & -size;
+	uint64_t *cursor = (uint64_t *)sm->sm_ppd + highbit(align) - 1;
+	uint64_t max_size = metaslab_pp_maxsize(sm);
+	int free_pct = sm->sm_space * 100 / sm->sm_size;
+
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+	ASSERT3U(avl_numnodes(&sm->sm_root), ==, avl_numnodes(sm->sm_pp_root));
+
+	if (max_size < size)
+		return (-1ULL);
+
+	/*
+	 * If we're running low on space switch to using the size
+	 * sorted AVL tree (best-fit).
+	 */
+	if (max_size < metaslab_df_alloc_threshold ||
+	    free_pct < metaslab_df_free_pct) {
+		t = sm->sm_pp_root;
+		*cursor = 0;
+	}
+
+	return (metaslab_block_picker(t, cursor, size, 1ULL));
+}
+
+static boolean_t
+metaslab_df_fragmented(space_map_t *sm)
+{
+	uint64_t max_size = metaslab_pp_maxsize(sm);
+	int free_pct = sm->sm_space * 100 / sm->sm_size;
+
+	if (max_size >= metaslab_df_alloc_threshold &&
+	    free_pct >= metaslab_df_free_pct)
+		return (B_FALSE);
+
+	return (B_TRUE);
+}
+
+static space_map_ops_t metaslab_df_ops = {
+	metaslab_pp_load,
+	metaslab_pp_unload,
+	metaslab_df_alloc,
+	metaslab_pp_claim,
+	metaslab_pp_free,
+	metaslab_pp_maxsize,
+	metaslab_df_fragmented
+};
+
+/*
+ * ==========================================================================
+ * Other experimental allocators
+ * ==========================================================================
+ */
+static uint64_t
+metaslab_cdf_alloc(space_map_t *sm, uint64_t size)
+{
+	avl_tree_t *t = &sm->sm_root;
+	uint64_t *cursor = (uint64_t *)sm->sm_ppd;
+	uint64_t *extent_end = (uint64_t *)sm->sm_ppd + 1;
+	uint64_t max_size = metaslab_pp_maxsize(sm);
+	uint64_t rsize = size;
+	uint64_t offset = 0;
+
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+	ASSERT3U(avl_numnodes(&sm->sm_root), ==, avl_numnodes(sm->sm_pp_root));
+
+	if (max_size < size)
+		return (-1ULL);
+
+	ASSERT3U(*extent_end, >=, *cursor);
+
+	/*
+	 * If we're running low on space switch to using the size
+	 * sorted AVL tree (best-fit).
+	 */
+	if ((*cursor + size) > *extent_end) {
+
+		t = sm->sm_pp_root;
+		*cursor = *extent_end = 0;
+
+		if (max_size > 2 * SPA_MAXBLOCKSIZE)
+			rsize = MIN(metaslab_min_alloc_size, max_size);
+		offset = metaslab_block_picker(t, extent_end, rsize, 1ULL);
+		if (offset != -1)
+			*cursor = offset + size;
+	} else {
+		offset = metaslab_block_picker(t, cursor, rsize, 1ULL);
+	}
+	ASSERT3U(*cursor, <=, *extent_end);
+	return (offset);
+}
+
+static boolean_t
+metaslab_cdf_fragmented(space_map_t *sm)
+{
+	uint64_t max_size = metaslab_pp_maxsize(sm);
+
+	if (max_size > (metaslab_min_alloc_size * 10))
+		return (B_FALSE);
+	return (B_TRUE);
+}
+
+static space_map_ops_t metaslab_cdf_ops = {
+	metaslab_pp_load,
+	metaslab_pp_unload,
+	metaslab_cdf_alloc,
+	metaslab_pp_claim,
+	metaslab_pp_free,
+	metaslab_pp_maxsize,
+	metaslab_cdf_fragmented
+};
+
+uint64_t metaslab_ndf_clump_shift = 4;
+
+static uint64_t
+metaslab_ndf_alloc(space_map_t *sm, uint64_t size)
+{
+	avl_tree_t *t = &sm->sm_root;
+	avl_index_t where;
+	space_seg_t *ss, ssearch;
+	uint64_t hbit = highbit(size);
+	uint64_t *cursor = (uint64_t *)sm->sm_ppd + hbit - 1;
+	uint64_t max_size = metaslab_pp_maxsize(sm);
+
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+	ASSERT3U(avl_numnodes(&sm->sm_root), ==, avl_numnodes(sm->sm_pp_root));
+
+	if (max_size < size)
+		return (-1ULL);
+
+	ssearch.ss_start = *cursor;
+	ssearch.ss_end = *cursor + size;
+
+	ss = avl_find(t, &ssearch, &where);
+	if (ss == NULL || (ss->ss_start + size > ss->ss_end)) {
+		t = sm->sm_pp_root;
+
+		ssearch.ss_start = 0;
+		ssearch.ss_end = MIN(max_size,
+		    1ULL << (hbit + metaslab_ndf_clump_shift));
+		ss = avl_find(t, &ssearch, &where);
+		if (ss == NULL)
+			ss = avl_nearest(t, where, AVL_AFTER);
+		ASSERT(ss != NULL);
+	}
+
+	if (ss != NULL) {
+		if (ss->ss_start + size <= ss->ss_end) {
+			*cursor = ss->ss_start + size;
+			return (ss->ss_start);
+		}
+	}
+	return (-1ULL);
+}
+
+static boolean_t
+metaslab_ndf_fragmented(space_map_t *sm)
+{
+	uint64_t max_size = metaslab_pp_maxsize(sm);
+
+	if (max_size > (metaslab_min_alloc_size << metaslab_ndf_clump_shift))
+		return (B_FALSE);
+	return (B_TRUE);
+}
+
+
+static space_map_ops_t metaslab_ndf_ops = {
+	metaslab_pp_load,
+	metaslab_pp_unload,
+	metaslab_ndf_alloc,
+	metaslab_pp_claim,
+	metaslab_pp_free,
+	metaslab_pp_maxsize,
+	metaslab_ndf_fragmented
+};
+
+space_map_ops_t *zfs_metaslab_ops = &metaslab_ndf_ops;
+
+/*
+ * ==========================================================================
+ * Metaslabs
+ * ==========================================================================
+ */
+metaslab_t *
+metaslab_init(metaslab_group_t *mg, space_map_obj_t *smo,
+	uint64_t start, uint64_t size, uint64_t txg)
+{
+	vdev_t *vd = mg->mg_vd;
+	metaslab_t *msp;
+
+	msp = kmem_zalloc(sizeof (metaslab_t), KM_SLEEP);
+	mutex_init(&msp->ms_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	msp->ms_smo_syncing = *smo;
+
+	/*
+	 * We create the main space map here, but we don't create the
+	 * allocmaps and freemaps until metaslab_sync_done().  This serves
+	 * two purposes: it allows metaslab_sync_done() to detect the
+	 * addition of new space; and for debugging, it ensures that we'd
+	 * data fault on any attempt to use this metaslab before it's ready.
+	 */
+	space_map_create(&msp->ms_map, start, size,
+	    vd->vdev_ashift, &msp->ms_lock);
+
+	metaslab_group_add(mg, msp);
+
+	if (metaslab_debug && smo->smo_object != 0) {
+		mutex_enter(&msp->ms_lock);
+		VERIFY(space_map_load(&msp->ms_map, mg->mg_class->mc_ops,
+		    SM_FREE, smo, spa_meta_objset(vd->vdev_spa)) == 0);
+		mutex_exit(&msp->ms_lock);
+	}
+
+	/*
+	 * If we're opening an existing pool (txg == 0) or creating
+	 * a new one (txg == TXG_INITIAL), all space is available now.
+	 * If we're adding space to an existing pool, the new space
+	 * does not become available until after this txg has synced.
+	 */
+	if (txg <= TXG_INITIAL)
+		metaslab_sync_done(msp, 0);
+
+	if (txg != 0) {
+		vdev_dirty(vd, 0, NULL, txg);
+		vdev_dirty(vd, VDD_METASLAB, msp, txg);
+	}
+
+	return (msp);
+}
+
+void
+metaslab_fini(metaslab_t *msp)
+{
+	metaslab_group_t *mg = msp->ms_group;
+
+	vdev_space_update(mg->mg_vd,
+	    -msp->ms_smo.smo_alloc, 0, -msp->ms_map.sm_size);
+
+	metaslab_group_remove(mg, msp);
+
+	mutex_enter(&msp->ms_lock);
+
+	space_map_unload(&msp->ms_map);
+	space_map_destroy(&msp->ms_map);
+
+	for (int t = 0; t < TXG_SIZE; t++) {
+		space_map_destroy(&msp->ms_allocmap[t]);
+		space_map_destroy(&msp->ms_freemap[t]);
+	}
+
+	for (int t = 0; t < TXG_DEFER_SIZE; t++)
+		space_map_destroy(&msp->ms_defermap[t]);
+
+	ASSERT3S(msp->ms_deferspace, ==, 0);
+
+	mutex_exit(&msp->ms_lock);
+	mutex_destroy(&msp->ms_lock);
+
+	kmem_free(msp, sizeof (metaslab_t));
+}
+
+#define	METASLAB_WEIGHT_PRIMARY		(1ULL << 63)
+#define	METASLAB_WEIGHT_SECONDARY	(1ULL << 62)
+#define	METASLAB_ACTIVE_MASK		\
+	(METASLAB_WEIGHT_PRIMARY | METASLAB_WEIGHT_SECONDARY)
+
+static uint64_t
+metaslab_weight(metaslab_t *msp)
+{
+	metaslab_group_t *mg = msp->ms_group;
+	space_map_t *sm = &msp->ms_map;
+	space_map_obj_t *smo = &msp->ms_smo;
+	vdev_t *vd = mg->mg_vd;
+	uint64_t weight, space;
+
+	ASSERT(MUTEX_HELD(&msp->ms_lock));
+
+	/*
+	 * The baseline weight is the metaslab's free space.
+	 */
+	space = sm->sm_size - smo->smo_alloc;
+	weight = space;
+
+	/*
+	 * Modern disks have uniform bit density and constant angular velocity.
+	 * Therefore, the outer recording zones are faster (higher bandwidth)
+	 * than the inner zones by the ratio of outer to inner track diameter,
+	 * which is typically around 2:1.  We account for this by assigning
+	 * higher weight to lower metaslabs (multiplier ranging from 2x to 1x).
+	 * In effect, this means that we'll select the metaslab with the most
+	 * free bandwidth rather than simply the one with the most free space.
+	 */
+	weight = 2 * weight -
+	    ((sm->sm_start >> vd->vdev_ms_shift) * weight) / vd->vdev_ms_count;
+	ASSERT(weight >= space && weight <= 2 * space);
+
+	/*
+	 * For locality, assign higher weight to metaslabs which have
+	 * a lower offset than what we've already activated.
+	 */
+	if (sm->sm_start <= mg->mg_bonus_area)
+		weight *= (metaslab_smo_bonus_pct / 100);
+	ASSERT(weight >= space &&
+	    weight <= 2 * (metaslab_smo_bonus_pct / 100) * space);
+
+	if (sm->sm_loaded && !sm->sm_ops->smop_fragmented(sm)) {
+		/*
+		 * If this metaslab is one we're actively using, adjust its
+		 * weight to make it preferable to any inactive metaslab so
+		 * we'll polish it off.
+		 */
+		weight |= (msp->ms_weight & METASLAB_ACTIVE_MASK);
+	}
+	return (weight);
+}
+
+static void
+metaslab_prefetch(metaslab_group_t *mg)
+{
+	spa_t *spa = mg->mg_vd->vdev_spa;
+	metaslab_t *msp;
+	avl_tree_t *t = &mg->mg_metaslab_tree;
+	int m;
+
+	mutex_enter(&mg->mg_lock);
+
+	/*
+	 * Prefetch the next potential metaslabs
+	 */
+	for (msp = avl_first(t), m = 0; msp; msp = AVL_NEXT(t, msp), m++) {
+		space_map_t *sm = &msp->ms_map;
+		space_map_obj_t *smo = &msp->ms_smo;
+
+		/* If we have reached our prefetch limit then we're done */
+		if (m >= metaslab_prefetch_limit)
+			break;
+
+		if (!sm->sm_loaded && smo->smo_object != 0) {
+			mutex_exit(&mg->mg_lock);
+			dmu_prefetch(spa_meta_objset(spa), smo->smo_object,
+			    0ULL, smo->smo_objsize);
+			mutex_enter(&mg->mg_lock);
+		}
+	}
+	mutex_exit(&mg->mg_lock);
+}
+
+static int
+metaslab_activate(metaslab_t *msp, uint64_t activation_weight, uint64_t size)
+{
+	metaslab_group_t *mg = msp->ms_group;
+	space_map_t *sm = &msp->ms_map;
+	space_map_ops_t *sm_ops = msp->ms_group->mg_class->mc_ops;
+
+	ASSERT(MUTEX_HELD(&msp->ms_lock));
+
+	if ((msp->ms_weight & METASLAB_ACTIVE_MASK) == 0) {
+		space_map_load_wait(sm);
+		if (!sm->sm_loaded) {
+			int error = space_map_load(sm, sm_ops, SM_FREE,
+			    &msp->ms_smo,
+			    spa_meta_objset(msp->ms_group->mg_vd->vdev_spa));
+			if (error)  {
+				metaslab_group_sort(msp->ms_group, msp, 0);
+				return (error);
+			}
+			for (int t = 0; t < TXG_DEFER_SIZE; t++)
+				space_map_walk(&msp->ms_defermap[t],
+				    space_map_claim, sm);
+
+		}
+
+		/*
+		 * Track the bonus area as we activate new metaslabs.
+		 */
+		if (sm->sm_start > mg->mg_bonus_area) {
+			mutex_enter(&mg->mg_lock);
+			mg->mg_bonus_area = sm->sm_start;
+			mutex_exit(&mg->mg_lock);
+		}
+
+		/*
+		 * If we were able to load the map then make sure
+		 * that this map is still able to satisfy our request.
+		 */
+		if (msp->ms_weight < size)
+			return (ENOSPC);
+
+		metaslab_group_sort(msp->ms_group, msp,
+		    msp->ms_weight | activation_weight);
+	}
+	ASSERT(sm->sm_loaded);
+	ASSERT(msp->ms_weight & METASLAB_ACTIVE_MASK);
+
+	return (0);
+}
+
+static void
+metaslab_passivate(metaslab_t *msp, uint64_t size)
+{
+	/*
+	 * If size < SPA_MINBLOCKSIZE, then we will not allocate from
+	 * this metaslab again.  In that case, it had better be empty,
+	 * or we would be leaving space on the table.
+	 */
+	ASSERT(size >= SPA_MINBLOCKSIZE || msp->ms_map.sm_space == 0);
+	metaslab_group_sort(msp->ms_group, msp, MIN(msp->ms_weight, size));
+	ASSERT((msp->ms_weight & METASLAB_ACTIVE_MASK) == 0);
+}
+
+/*
+ * Write a metaslab to disk in the context of the specified transaction group.
+ */
+void
+metaslab_sync(metaslab_t *msp, uint64_t txg)
+{
+	vdev_t *vd = msp->ms_group->mg_vd;
+	spa_t *spa = vd->vdev_spa;
+	objset_t *mos = spa_meta_objset(spa);
+	space_map_t *allocmap = &msp->ms_allocmap[txg & TXG_MASK];
+	space_map_t *freemap = &msp->ms_freemap[txg & TXG_MASK];
+	space_map_t *freed_map = &msp->ms_freemap[TXG_CLEAN(txg) & TXG_MASK];
+	space_map_t *sm = &msp->ms_map;
+	space_map_obj_t *smo = &msp->ms_smo_syncing;
+	dmu_buf_t *db;
+	dmu_tx_t *tx;
+
+	ASSERT(!vd->vdev_ishole);
+
+	if (allocmap->sm_space == 0 && freemap->sm_space == 0)
+		return;
+
+	/*
+	 * The only state that can actually be changing concurrently with
+	 * metaslab_sync() is the metaslab's ms_map.  No other thread can
+	 * be modifying this txg's allocmap, freemap, freed_map, or smo.
+	 * Therefore, we only hold ms_lock to satify space_map ASSERTs.
+	 * We drop it whenever we call into the DMU, because the DMU
+	 * can call down to us (e.g. via zio_free()) at any time.
+	 */
+
+	tx = dmu_tx_create_assigned(spa_get_dsl(spa), txg);
+
+	if (smo->smo_object == 0) {
+		ASSERT(smo->smo_objsize == 0);
+		ASSERT(smo->smo_alloc == 0);
+		smo->smo_object = dmu_object_alloc(mos,
+		    DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT,
+		    DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx);
+		ASSERT(smo->smo_object != 0);
+		dmu_write(mos, vd->vdev_ms_array, sizeof (uint64_t) *
+		    (sm->sm_start >> vd->vdev_ms_shift),
+		    sizeof (uint64_t), &smo->smo_object, tx);
+	}
+
+	mutex_enter(&msp->ms_lock);
+
+	space_map_walk(freemap, space_map_add, freed_map);
+
+	if (sm->sm_loaded && spa_sync_pass(spa) == 1 && smo->smo_objsize >=
+	    2 * sizeof (uint64_t) * avl_numnodes(&sm->sm_root)) {
+		/*
+		 * The in-core space map representation is twice as compact
+		 * as the on-disk one, so it's time to condense the latter
+		 * by generating a pure allocmap from first principles.
+		 *
+		 * This metaslab is 100% allocated,
+		 * minus the content of the in-core map (sm),
+		 * minus what's been freed this txg (freed_map),
+		 * minus deferred frees (ms_defermap[]),
+		 * minus allocations from txgs in the future
+		 * (because they haven't been committed yet).
+		 */
+		space_map_vacate(allocmap, NULL, NULL);
+		space_map_vacate(freemap, NULL, NULL);
+
+		space_map_add(allocmap, allocmap->sm_start, allocmap->sm_size);
+
+		space_map_walk(sm, space_map_remove, allocmap);
+		space_map_walk(freed_map, space_map_remove, allocmap);
+
+		for (int t = 0; t < TXG_DEFER_SIZE; t++)
+			space_map_walk(&msp->ms_defermap[t],
+			    space_map_remove, allocmap);
+
+		for (int t = 1; t < TXG_CONCURRENT_STATES; t++)
+			space_map_walk(&msp->ms_allocmap[(txg + t) & TXG_MASK],
+			    space_map_remove, allocmap);
+
+		mutex_exit(&msp->ms_lock);
+		space_map_truncate(smo, mos, tx);
+		mutex_enter(&msp->ms_lock);
+	}
+
+	space_map_sync(allocmap, SM_ALLOC, smo, mos, tx);
+	space_map_sync(freemap, SM_FREE, smo, mos, tx);
+
+	mutex_exit(&msp->ms_lock);
+
+	VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db));
+	dmu_buf_will_dirty(db, tx);
+	ASSERT3U(db->db_size, >=, sizeof (*smo));
+	bcopy(smo, db->db_data, sizeof (*smo));
+	dmu_buf_rele(db, FTAG);
+
+	dmu_tx_commit(tx);
+}
+
+/*
+ * Called after a transaction group has completely synced to mark
+ * all of the metaslab's free space as usable.
+ */
+void
+metaslab_sync_done(metaslab_t *msp, uint64_t txg)
+{
+	space_map_obj_t *smo = &msp->ms_smo;
+	space_map_obj_t *smosync = &msp->ms_smo_syncing;
+	space_map_t *sm = &msp->ms_map;
+	space_map_t *freed_map = &msp->ms_freemap[TXG_CLEAN(txg) & TXG_MASK];
+	space_map_t *defer_map = &msp->ms_defermap[txg % TXG_DEFER_SIZE];
+	metaslab_group_t *mg = msp->ms_group;
+	vdev_t *vd = mg->mg_vd;
+	int64_t alloc_delta, defer_delta;
+
+	ASSERT(!vd->vdev_ishole);
+
+	mutex_enter(&msp->ms_lock);
+
+	/*
+	 * If this metaslab is just becoming available, initialize its
+	 * allocmaps and freemaps and add its capacity to the vdev.
+	 */
+	if (freed_map->sm_size == 0) {
+		for (int t = 0; t < TXG_SIZE; t++) {
+			space_map_create(&msp->ms_allocmap[t], sm->sm_start,
+			    sm->sm_size, sm->sm_shift, sm->sm_lock);
+			space_map_create(&msp->ms_freemap[t], sm->sm_start,
+			    sm->sm_size, sm->sm_shift, sm->sm_lock);
+		}
+
+		for (int t = 0; t < TXG_DEFER_SIZE; t++)
+			space_map_create(&msp->ms_defermap[t], sm->sm_start,
+			    sm->sm_size, sm->sm_shift, sm->sm_lock);
+
+		vdev_space_update(vd, 0, 0, sm->sm_size);
+	}
+
+	alloc_delta = smosync->smo_alloc - smo->smo_alloc;
+	defer_delta = freed_map->sm_space - defer_map->sm_space;
+
+	vdev_space_update(vd, alloc_delta + defer_delta, defer_delta, 0);
+
+	ASSERT(msp->ms_allocmap[txg & TXG_MASK].sm_space == 0);
+	ASSERT(msp->ms_freemap[txg & TXG_MASK].sm_space == 0);
+
+	/*
+	 * If there's a space_map_load() in progress, wait for it to complete
+	 * so that we have a consistent view of the in-core space map.
+	 * Then, add defer_map (oldest deferred frees) to this map and
+	 * transfer freed_map (this txg's frees) to defer_map.
+	 */
+	space_map_load_wait(sm);
+	space_map_vacate(defer_map, sm->sm_loaded ? space_map_free : NULL, sm);
+	space_map_vacate(freed_map, space_map_add, defer_map);
+
+	*smo = *smosync;
+
+	msp->ms_deferspace += defer_delta;
+	ASSERT3S(msp->ms_deferspace, >=, 0);
+	ASSERT3S(msp->ms_deferspace, <=, sm->sm_size);
+	if (msp->ms_deferspace != 0) {
+		/*
+		 * Keep syncing this metaslab until all deferred frees
+		 * are back in circulation.
+		 */
+		vdev_dirty(vd, VDD_METASLAB, msp, txg + 1);
+	}
+
+	/*
+	 * If the map is loaded but no longer active, evict it as soon as all
+	 * future allocations have synced.  (If we unloaded it now and then
+	 * loaded a moment later, the map wouldn't reflect those allocations.)
+	 */
+	if (sm->sm_loaded && (msp->ms_weight & METASLAB_ACTIVE_MASK) == 0) {
+		int evictable = 1;
+
+		for (int t = 1; t < TXG_CONCURRENT_STATES; t++)
+			if (msp->ms_allocmap[(txg + t) & TXG_MASK].sm_space)
+				evictable = 0;
+
+		if (evictable && !metaslab_debug)
+			space_map_unload(sm);
+	}
+
+	metaslab_group_sort(mg, msp, metaslab_weight(msp));
+
+	mutex_exit(&msp->ms_lock);
+}
+
+void
+metaslab_sync_reassess(metaslab_group_t *mg)
+{
+	vdev_t *vd = mg->mg_vd;
+
+	/*
+	 * Re-evaluate all metaslabs which have lower offsets than the
+	 * bonus area.
+	 */
+	for (int m = 0; m < vd->vdev_ms_count; m++) {
+		metaslab_t *msp = vd->vdev_ms[m];
+
+		if (msp->ms_map.sm_start > mg->mg_bonus_area)
+			break;
+
+		mutex_enter(&msp->ms_lock);
+		metaslab_group_sort(mg, msp, metaslab_weight(msp));
+		mutex_exit(&msp->ms_lock);
+	}
+
+	/*
+	 * Prefetch the next potential metaslabs
+	 */
+	metaslab_prefetch(mg);
+}
+
+static uint64_t
+metaslab_distance(metaslab_t *msp, dva_t *dva)
+{
+	uint64_t ms_shift = msp->ms_group->mg_vd->vdev_ms_shift;
+	uint64_t offset = DVA_GET_OFFSET(dva) >> ms_shift;
+	uint64_t start = msp->ms_map.sm_start >> ms_shift;
+
+	if (msp->ms_group->mg_vd->vdev_id != DVA_GET_VDEV(dva))
+		return (1ULL << 63);
+
+	if (offset < start)
+		return ((start - offset) << ms_shift);
+	if (offset > start)
+		return ((offset - start) << ms_shift);
+	return (0);
+}
+
+static uint64_t
+metaslab_group_alloc(metaslab_group_t *mg, uint64_t size, uint64_t txg,
+    uint64_t min_distance, dva_t *dva, int d)
+{
+	metaslab_t *msp = NULL;
+	uint64_t offset = -1ULL;
+	avl_tree_t *t = &mg->mg_metaslab_tree;
+	uint64_t activation_weight;
+	uint64_t target_distance;
+	int i;
+
+	activation_weight = METASLAB_WEIGHT_PRIMARY;
+	for (i = 0; i < d; i++) {
+		if (DVA_GET_VDEV(&dva[i]) == mg->mg_vd->vdev_id) {
+			activation_weight = METASLAB_WEIGHT_SECONDARY;
+			break;
+		}
+	}
+
+	for (;;) {
+		boolean_t was_active;
+
+		mutex_enter(&mg->mg_lock);
+		for (msp = avl_first(t); msp; msp = AVL_NEXT(t, msp)) {
+			if (msp->ms_weight < size) {
+				mutex_exit(&mg->mg_lock);
+				return (-1ULL);
+			}
+
+			was_active = msp->ms_weight & METASLAB_ACTIVE_MASK;
+			if (activation_weight == METASLAB_WEIGHT_PRIMARY)
+				break;
+
+			target_distance = min_distance +
+			    (msp->ms_smo.smo_alloc ? 0 : min_distance >> 1);
+
+			for (i = 0; i < d; i++)
+				if (metaslab_distance(msp, &dva[i]) <
+				    target_distance)
+					break;
+			if (i == d)
+				break;
+		}
+		mutex_exit(&mg->mg_lock);
+		if (msp == NULL)
+			return (-1ULL);
+
+		mutex_enter(&msp->ms_lock);
+
+		/*
+		 * Ensure that the metaslab we have selected is still
+		 * capable of handling our request. It's possible that
+		 * another thread may have changed the weight while we
+		 * were blocked on the metaslab lock.
+		 */
+		if (msp->ms_weight < size || (was_active &&
+		    !(msp->ms_weight & METASLAB_ACTIVE_MASK) &&
+		    activation_weight == METASLAB_WEIGHT_PRIMARY)) {
+			mutex_exit(&msp->ms_lock);
+			continue;
+		}
+
+		if ((msp->ms_weight & METASLAB_WEIGHT_SECONDARY) &&
+		    activation_weight == METASLAB_WEIGHT_PRIMARY) {
+			metaslab_passivate(msp,
+			    msp->ms_weight & ~METASLAB_ACTIVE_MASK);
+			mutex_exit(&msp->ms_lock);
+			continue;
+		}
+
+		if (metaslab_activate(msp, activation_weight, size) != 0) {
+			mutex_exit(&msp->ms_lock);
+			continue;
+		}
+
+		if ((offset = space_map_alloc(&msp->ms_map, size)) != -1ULL)
+			break;
+
+		metaslab_passivate(msp, space_map_maxsize(&msp->ms_map));
+
+		mutex_exit(&msp->ms_lock);
+	}
+
+	if (msp->ms_allocmap[txg & TXG_MASK].sm_space == 0)
+		vdev_dirty(mg->mg_vd, VDD_METASLAB, msp, txg);
+
+	space_map_add(&msp->ms_allocmap[txg & TXG_MASK], offset, size);
+
+	mutex_exit(&msp->ms_lock);
+
+	return (offset);
+}
+
+/*
+ * Allocate a block for the specified i/o.
+ */
+static int
+metaslab_alloc_dva(spa_t *spa, metaslab_class_t *mc, uint64_t psize,
+    dva_t *dva, int d, dva_t *hintdva, uint64_t txg, int flags)
+{
+	metaslab_group_t *mg, *rotor;
+	vdev_t *vd;
+	int dshift = 3;
+	int all_zero;
+	int zio_lock = B_FALSE;
+	boolean_t allocatable;
+	uint64_t offset = -1ULL;
+	uint64_t asize;
+	uint64_t distance;
+
+	ASSERT(!DVA_IS_VALID(&dva[d]));
+
+	/*
+	 * For testing, make some blocks above a certain size be gang blocks.
+	 */
+	if (psize >= metaslab_gang_bang && (ddi_get_lbolt() & 3) == 0)
+		return (ENOSPC);
+
+	/*
+	 * Start at the rotor and loop through all mgs until we find something.
+	 * Note that there's no locking on mc_rotor or mc_aliquot because
+	 * nothing actually breaks if we miss a few updates -- we just won't
+	 * allocate quite as evenly.  It all balances out over time.
+	 *
+	 * If we are doing ditto or log blocks, try to spread them across
+	 * consecutive vdevs.  If we're forced to reuse a vdev before we've
+	 * allocated all of our ditto blocks, then try and spread them out on
+	 * that vdev as much as possible.  If it turns out to not be possible,
+	 * gradually lower our standards until anything becomes acceptable.
+	 * Also, allocating on consecutive vdevs (as opposed to random vdevs)
+	 * gives us hope of containing our fault domains to something we're
+	 * able to reason about.  Otherwise, any two top-level vdev failures
+	 * will guarantee the loss of data.  With consecutive allocation,
+	 * only two adjacent top-level vdev failures will result in data loss.
+	 *
+	 * If we are doing gang blocks (hintdva is non-NULL), try to keep
+	 * ourselves on the same vdev as our gang block header.  That
+	 * way, we can hope for locality in vdev_cache, plus it makes our
+	 * fault domains something tractable.
+	 */
+	if (hintdva) {
+		vd = vdev_lookup_top(spa, DVA_GET_VDEV(&hintdva[d]));
+
+		/*
+		 * It's possible the vdev we're using as the hint no
+		 * longer exists (i.e. removed). Consult the rotor when
+		 * all else fails.
+		 */
+		if (vd != NULL) {
+			mg = vd->vdev_mg;
+
+			if (flags & METASLAB_HINTBP_AVOID &&
+			    mg->mg_next != NULL)
+				mg = mg->mg_next;
+		} else {
+			mg = mc->mc_rotor;
+		}
+	} else if (d != 0) {
+		vd = vdev_lookup_top(spa, DVA_GET_VDEV(&dva[d - 1]));
+		mg = vd->vdev_mg->mg_next;
+	} else {
+		mg = mc->mc_rotor;
+	}
+
+	/*
+	 * If the hint put us into the wrong metaslab class, or into a
+	 * metaslab group that has been passivated, just follow the rotor.
+	 */
+	if (mg->mg_class != mc || mg->mg_activation_count <= 0)
+		mg = mc->mc_rotor;
+
+	rotor = mg;
+top:
+	all_zero = B_TRUE;
+	do {
+		ASSERT(mg->mg_activation_count == 1);
+
+		vd = mg->mg_vd;
+
+		/*
+		 * Don't allocate from faulted devices.
+		 */
+		if (zio_lock) {
+			spa_config_enter(spa, SCL_ZIO, FTAG, RW_READER);
+			allocatable = vdev_allocatable(vd);
+			spa_config_exit(spa, SCL_ZIO, FTAG);
+		} else {
+			allocatable = vdev_allocatable(vd);
+		}
+		if (!allocatable)
+			goto next;
+
+		/*
+		 * Avoid writing single-copy data to a failing vdev
+		 */
+		if ((vd->vdev_stat.vs_write_errors > 0 ||
+		    vd->vdev_state < VDEV_STATE_HEALTHY) &&
+		    d == 0 && dshift == 3) {
+			all_zero = B_FALSE;
+			goto next;
+		}
+
+		ASSERT(mg->mg_class == mc);
+
+		distance = vd->vdev_asize >> dshift;
+		if (distance <= (1ULL << vd->vdev_ms_shift))
+			distance = 0;
+		else
+			all_zero = B_FALSE;
+
+		asize = vdev_psize_to_asize(vd, psize);
+		ASSERT(P2PHASE(asize, 1ULL << vd->vdev_ashift) == 0);
+
+		offset = metaslab_group_alloc(mg, asize, txg, distance, dva, d);
+		if (offset != -1ULL) {
+			/*
+			 * If we've just selected this metaslab group,
+			 * figure out whether the corresponding vdev is
+			 * over- or under-used relative to the pool,
+			 * and set an allocation bias to even it out.
+			 */
+			if (mc->mc_aliquot == 0) {
+				vdev_stat_t *vs = &vd->vdev_stat;
+				int64_t vu, cu;
+
+				/*
+				 * Determine percent used in units of 0..1024.
+				 * (This is just to avoid floating point.)
+				 */
+				vu = (vs->vs_alloc << 10) / (vs->vs_space + 1);
+				cu = (mc->mc_alloc << 10) / (mc->mc_space + 1);
+
+				/*
+				 * Bias by at most +/- 25% of the aliquot.
+				 */
+				mg->mg_bias = ((cu - vu) *
+				    (int64_t)mg->mg_aliquot) / (1024 * 4);
+			}
+
+			if (atomic_add_64_nv(&mc->mc_aliquot, asize) >=
+			    mg->mg_aliquot + mg->mg_bias) {
+				mc->mc_rotor = mg->mg_next;
+				mc->mc_aliquot = 0;
+			}
+
+			DVA_SET_VDEV(&dva[d], vd->vdev_id);
+			DVA_SET_OFFSET(&dva[d], offset);
+			DVA_SET_GANG(&dva[d], !!(flags & METASLAB_GANG_HEADER));
+			DVA_SET_ASIZE(&dva[d], asize);
+
+			return (0);
+		}
+next:
+		mc->mc_rotor = mg->mg_next;
+		mc->mc_aliquot = 0;
+	} while ((mg = mg->mg_next) != rotor);
+
+	if (!all_zero) {
+		dshift++;
+		ASSERT(dshift < 64);
+		goto top;
+	}
+
+	if (!allocatable && !zio_lock) {
+		dshift = 3;
+		zio_lock = B_TRUE;
+		goto top;
+	}
+
+	bzero(&dva[d], sizeof (dva_t));
+
+	return (ENOSPC);
+}
+
+/*
+ * Free the block represented by DVA in the context of the specified
+ * transaction group.
+ */
+static void
+metaslab_free_dva(spa_t *spa, const dva_t *dva, uint64_t txg, boolean_t now)
+{
+	uint64_t vdev = DVA_GET_VDEV(dva);
+	uint64_t offset = DVA_GET_OFFSET(dva);
+	uint64_t size = DVA_GET_ASIZE(dva);
+	vdev_t *vd;
+	metaslab_t *msp;
+
+	ASSERT(DVA_IS_VALID(dva));
+
+	if (txg > spa_freeze_txg(spa))
+		return;
+
+	if ((vd = vdev_lookup_top(spa, vdev)) == NULL ||
+	    (offset >> vd->vdev_ms_shift) >= vd->vdev_ms_count) {
+		cmn_err(CE_WARN, "metaslab_free_dva(): bad DVA %llu:%llu",
+		    (u_longlong_t)vdev, (u_longlong_t)offset);
+		ASSERT(0);
+		return;
+	}
+
+	msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
+
+	if (DVA_GET_GANG(dva))
+		size = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE);
+
+	mutex_enter(&msp->ms_lock);
+
+	if (now) {
+		space_map_remove(&msp->ms_allocmap[txg & TXG_MASK],
+		    offset, size);
+		space_map_free(&msp->ms_map, offset, size);
+	} else {
+		if (msp->ms_freemap[txg & TXG_MASK].sm_space == 0)
+			vdev_dirty(vd, VDD_METASLAB, msp, txg);
+		space_map_add(&msp->ms_freemap[txg & TXG_MASK], offset, size);
+	}
+
+	mutex_exit(&msp->ms_lock);
+}
+
+/*
+ * Intent log support: upon opening the pool after a crash, notify the SPA
+ * of blocks that the intent log has allocated for immediate write, but
+ * which are still considered free by the SPA because the last transaction
+ * group didn't commit yet.
+ */
+static int
+metaslab_claim_dva(spa_t *spa, const dva_t *dva, uint64_t txg)
+{
+	uint64_t vdev = DVA_GET_VDEV(dva);
+	uint64_t offset = DVA_GET_OFFSET(dva);
+	uint64_t size = DVA_GET_ASIZE(dva);
+	vdev_t *vd;
+	metaslab_t *msp;
+	int error = 0;
+
+	ASSERT(DVA_IS_VALID(dva));
+
+	if ((vd = vdev_lookup_top(spa, vdev)) == NULL ||
+	    (offset >> vd->vdev_ms_shift) >= vd->vdev_ms_count)
+		return (ENXIO);
+
+	msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
+
+	if (DVA_GET_GANG(dva))
+		size = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE);
+
+	mutex_enter(&msp->ms_lock);
+
+	if ((txg != 0 && spa_writeable(spa)) || !msp->ms_map.sm_loaded)
+		error = metaslab_activate(msp, METASLAB_WEIGHT_SECONDARY, 0);
+
+	if (error == 0 && !space_map_contains(&msp->ms_map, offset, size))
+		error = ENOENT;
+
+	if (error || txg == 0) {	/* txg == 0 indicates dry run */
+		mutex_exit(&msp->ms_lock);
+		return (error);
+	}
+
+	space_map_claim(&msp->ms_map, offset, size);
+
+	if (spa_writeable(spa)) {	/* don't dirty if we're zdb(1M) */
+		if (msp->ms_allocmap[txg & TXG_MASK].sm_space == 0)
+			vdev_dirty(vd, VDD_METASLAB, msp, txg);
+		space_map_add(&msp->ms_allocmap[txg & TXG_MASK], offset, size);
+	}
+
+	mutex_exit(&msp->ms_lock);
+
+	return (0);
+}
+
+int
+metaslab_alloc(spa_t *spa, metaslab_class_t *mc, uint64_t psize, blkptr_t *bp,
+    int ndvas, uint64_t txg, blkptr_t *hintbp, int flags)
+{
+	dva_t *dva = bp->blk_dva;
+	dva_t *hintdva = hintbp->blk_dva;
+	int error = 0;
+
+	ASSERT(bp->blk_birth == 0);
+	ASSERT(BP_PHYSICAL_BIRTH(bp) == 0);
+
+	spa_config_enter(spa, SCL_ALLOC, FTAG, RW_READER);
+
+	if (mc->mc_rotor == NULL) {	/* no vdevs in this class */
+		spa_config_exit(spa, SCL_ALLOC, FTAG);
+		return (ENOSPC);
+	}
+
+	ASSERT(ndvas > 0 && ndvas <= spa_max_replication(spa));
+	ASSERT(BP_GET_NDVAS(bp) == 0);
+	ASSERT(hintbp == NULL || ndvas <= BP_GET_NDVAS(hintbp));
+
+	for (int d = 0; d < ndvas; d++) {
+		error = metaslab_alloc_dva(spa, mc, psize, dva, d, hintdva,
+		    txg, flags);
+		if (error) {
+			for (d--; d >= 0; d--) {
+				metaslab_free_dva(spa, &dva[d], txg, B_TRUE);
+				bzero(&dva[d], sizeof (dva_t));
+			}
+			spa_config_exit(spa, SCL_ALLOC, FTAG);
+			return (error);
+		}
+	}
+	ASSERT(error == 0);
+	ASSERT(BP_GET_NDVAS(bp) == ndvas);
+
+	spa_config_exit(spa, SCL_ALLOC, FTAG);
+
+	BP_SET_BIRTH(bp, txg, txg);
+
+	return (0);
+}
+
+void
+metaslab_free(spa_t *spa, const blkptr_t *bp, uint64_t txg, boolean_t now)
+{
+	const dva_t *dva = bp->blk_dva;
+	int ndvas = BP_GET_NDVAS(bp);
+
+	ASSERT(!BP_IS_HOLE(bp));
+	ASSERT(!now || bp->blk_birth >= spa_syncing_txg(spa));
+
+	spa_config_enter(spa, SCL_FREE, FTAG, RW_READER);
+
+	for (int d = 0; d < ndvas; d++)
+		metaslab_free_dva(spa, &dva[d], txg, now);
+
+	spa_config_exit(spa, SCL_FREE, FTAG);
+}
+
+int
+metaslab_claim(spa_t *spa, const blkptr_t *bp, uint64_t txg)
+{
+	const dva_t *dva = bp->blk_dva;
+	int ndvas = BP_GET_NDVAS(bp);
+	int error = 0;
+
+	ASSERT(!BP_IS_HOLE(bp));
+
+	if (txg != 0) {
+		/*
+		 * First do a dry run to make sure all DVAs are claimable,
+		 * so we don't have to unwind from partial failures below.
+		 */
+		if ((error = metaslab_claim(spa, bp, 0)) != 0)
+			return (error);
+	}
+
+	spa_config_enter(spa, SCL_ALLOC, FTAG, RW_READER);
+
+	for (int d = 0; d < ndvas; d++)
+		if ((error = metaslab_claim_dva(spa, &dva[d], txg)) != 0)
+			break;
+
+	spa_config_exit(spa, SCL_ALLOC, FTAG);
+
+	ASSERT(error == 0 || txg == 0);
+
+	return (error);
+}
diff --git a/uts/common/fs/zfs/refcount.c b/uts/common/fs/zfs/refcount.c
new file mode 100644
index 000000000000..600132f080e7
--- /dev/null
+++ b/uts/common/fs/zfs/refcount.c
@@ -0,0 +1,223 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/refcount.h>
+
+#ifdef	ZFS_DEBUG
+
+#ifdef _KERNEL
+int reference_tracking_enable = FALSE; /* runs out of memory too easily */
+#else
+int reference_tracking_enable = TRUE;
+#endif
+int reference_history = 4; /* tunable */
+
+static kmem_cache_t *reference_cache;
+static kmem_cache_t *reference_history_cache;
+
+void
+refcount_init(void)
+{
+	reference_cache = kmem_cache_create("reference_cache",
+	    sizeof (reference_t), 0, NULL, NULL, NULL, NULL, NULL, 0);
+
+	reference_history_cache = kmem_cache_create("reference_history_cache",
+	    sizeof (uint64_t), 0, NULL, NULL, NULL, NULL, NULL, 0);
+}
+
+void
+refcount_fini(void)
+{
+	kmem_cache_destroy(reference_cache);
+	kmem_cache_destroy(reference_history_cache);
+}
+
+void
+refcount_create(refcount_t *rc)
+{
+	mutex_init(&rc->rc_mtx, NULL, MUTEX_DEFAULT, NULL);
+	list_create(&rc->rc_list, sizeof (reference_t),
+	    offsetof(reference_t, ref_link));
+	list_create(&rc->rc_removed, sizeof (reference_t),
+	    offsetof(reference_t, ref_link));
+	rc->rc_count = 0;
+	rc->rc_removed_count = 0;
+}
+
+void
+refcount_destroy_many(refcount_t *rc, uint64_t number)
+{
+	reference_t *ref;
+
+	ASSERT(rc->rc_count == number);
+	while (ref = list_head(&rc->rc_list)) {
+		list_remove(&rc->rc_list, ref);
+		kmem_cache_free(reference_cache, ref);
+	}
+	list_destroy(&rc->rc_list);
+
+	while (ref = list_head(&rc->rc_removed)) {
+		list_remove(&rc->rc_removed, ref);
+		kmem_cache_free(reference_history_cache, ref->ref_removed);
+		kmem_cache_free(reference_cache, ref);
+	}
+	list_destroy(&rc->rc_removed);
+	mutex_destroy(&rc->rc_mtx);
+}
+
+void
+refcount_destroy(refcount_t *rc)
+{
+	refcount_destroy_many(rc, 0);
+}
+
+int
+refcount_is_zero(refcount_t *rc)
+{
+	ASSERT(rc->rc_count >= 0);
+	return (rc->rc_count == 0);
+}
+
+int64_t
+refcount_count(refcount_t *rc)
+{
+	ASSERT(rc->rc_count >= 0);
+	return (rc->rc_count);
+}
+
+int64_t
+refcount_add_many(refcount_t *rc, uint64_t number, void *holder)
+{
+	reference_t *ref;
+	int64_t count;
+
+	if (reference_tracking_enable) {
+		ref = kmem_cache_alloc(reference_cache, KM_SLEEP);
+		ref->ref_holder = holder;
+		ref->ref_number = number;
+	}
+	mutex_enter(&rc->rc_mtx);
+	ASSERT(rc->rc_count >= 0);
+	if (reference_tracking_enable)
+		list_insert_head(&rc->rc_list, ref);
+	rc->rc_count += number;
+	count = rc->rc_count;
+	mutex_exit(&rc->rc_mtx);
+
+	return (count);
+}
+
+int64_t
+refcount_add(refcount_t *rc, void *holder)
+{
+	return (refcount_add_many(rc, 1, holder));
+}
+
+int64_t
+refcount_remove_many(refcount_t *rc, uint64_t number, void *holder)
+{
+	reference_t *ref;
+	int64_t count;
+
+	mutex_enter(&rc->rc_mtx);
+	ASSERT(rc->rc_count >= number);
+
+	if (!reference_tracking_enable) {
+		rc->rc_count -= number;
+		count = rc->rc_count;
+		mutex_exit(&rc->rc_mtx);
+		return (count);
+	}
+
+	for (ref = list_head(&rc->rc_list); ref;
+	    ref = list_next(&rc->rc_list, ref)) {
+		if (ref->ref_holder == holder && ref->ref_number == number) {
+			list_remove(&rc->rc_list, ref);
+			if (reference_history > 0) {
+				ref->ref_removed =
+				    kmem_cache_alloc(reference_history_cache,
+				    KM_SLEEP);
+				list_insert_head(&rc->rc_removed, ref);
+				rc->rc_removed_count++;
+				if (rc->rc_removed_count >= reference_history) {
+					ref = list_tail(&rc->rc_removed);
+					list_remove(&rc->rc_removed, ref);
+					kmem_cache_free(reference_history_cache,
+					    ref->ref_removed);
+					kmem_cache_free(reference_cache, ref);
+					rc->rc_removed_count--;
+				}
+			} else {
+				kmem_cache_free(reference_cache, ref);
+			}
+			rc->rc_count -= number;
+			count = rc->rc_count;
+			mutex_exit(&rc->rc_mtx);
+			return (count);
+		}
+	}
+	panic("No such hold %p on refcount %llx", holder,
+	    (u_longlong_t)(uintptr_t)rc);
+	return (-1);
+}
+
+int64_t
+refcount_remove(refcount_t *rc, void *holder)
+{
+	return (refcount_remove_many(rc, 1, holder));
+}
+
+void
+refcount_transfer(refcount_t *dst, refcount_t *src)
+{
+	int64_t count, removed_count;
+	list_t list, removed;
+
+	list_create(&list, sizeof (reference_t),
+	    offsetof(reference_t, ref_link));
+	list_create(&removed, sizeof (reference_t),
+	    offsetof(reference_t, ref_link));
+
+	mutex_enter(&src->rc_mtx);
+	count = src->rc_count;
+	removed_count = src->rc_removed_count;
+	src->rc_count = 0;
+	src->rc_removed_count = 0;
+	list_move_tail(&list, &src->rc_list);
+	list_move_tail(&removed, &src->rc_removed);
+	mutex_exit(&src->rc_mtx);
+
+	mutex_enter(&dst->rc_mtx);
+	dst->rc_count += count;
+	dst->rc_removed_count += removed_count;
+	list_move_tail(&dst->rc_list, &list);
+	list_move_tail(&dst->rc_removed, &removed);
+	mutex_exit(&dst->rc_mtx);
+
+	list_destroy(&list);
+	list_destroy(&removed);
+}
+
+#endif	/* ZFS_DEBUG */
diff --git a/uts/common/fs/zfs/rrwlock.c b/uts/common/fs/zfs/rrwlock.c
new file mode 100644
index 000000000000..4cef53f95132
--- /dev/null
+++ b/uts/common/fs/zfs/rrwlock.c
@@ -0,0 +1,264 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/refcount.h>
+#include <sys/rrwlock.h>
+
+/*
+ * This file contains the implementation of a re-entrant read
+ * reader/writer lock (aka "rrwlock").
+ *
+ * This is a normal reader/writer lock with the additional feature
+ * of allowing threads who have already obtained a read lock to
+ * re-enter another read lock (re-entrant read) - even if there are
+ * waiting writers.
+ *
+ * Callers who have not obtained a read lock give waiting writers priority.
+ *
+ * The rrwlock_t lock does not allow re-entrant writers, nor does it
+ * allow a re-entrant mix of reads and writes (that is, it does not
+ * allow a caller who has already obtained a read lock to be able to
+ * then grab a write lock without first dropping all read locks, and
+ * vice versa).
+ *
+ * The rrwlock_t uses tsd (thread specific data) to keep a list of
+ * nodes (rrw_node_t), where each node keeps track of which specific
+ * lock (rrw_node_t::rn_rrl) the thread has grabbed.  Since re-entering
+ * should be rare, a thread that grabs multiple reads on the same rrwlock_t
+ * will store multiple rrw_node_ts of the same 'rrn_rrl'. Nodes on the
+ * tsd list can represent a different rrwlock_t.  This allows a thread
+ * to enter multiple and unique rrwlock_ts for read locks at the same time.
+ *
+ * Since using tsd exposes some overhead, the rrwlock_t only needs to
+ * keep tsd data when writers are waiting.  If no writers are waiting, then
+ * a reader just bumps the anonymous read count (rr_anon_rcount) - no tsd
+ * is needed.  Once a writer attempts to grab the lock, readers then
+ * keep tsd data and bump the linked readers count (rr_linked_rcount).
+ *
+ * If there are waiting writers and there are anonymous readers, then a
+ * reader doesn't know if it is a re-entrant lock. But since it may be one,
+ * we allow the read to proceed (otherwise it could deadlock).  Since once
+ * waiting writers are active, readers no longer bump the anonymous count,
+ * the anonymous readers will eventually flush themselves out.  At this point,
+ * readers will be able to tell if they are a re-entrant lock (have a
+ * rrw_node_t entry for the lock) or not. If they are a re-entrant lock, then
+ * we must let the proceed.  If they are not, then the reader blocks for the
+ * waiting writers.  Hence, we do not starve writers.
+ */
+
+/* global key for TSD */
+uint_t rrw_tsd_key;
+
+typedef struct rrw_node {
+	struct rrw_node	*rn_next;
+	rrwlock_t	*rn_rrl;
+} rrw_node_t;
+
+static rrw_node_t *
+rrn_find(rrwlock_t *rrl)
+{
+	rrw_node_t *rn;
+
+	if (refcount_count(&rrl->rr_linked_rcount) == 0)
+		return (NULL);
+
+	for (rn = tsd_get(rrw_tsd_key); rn != NULL; rn = rn->rn_next) {
+		if (rn->rn_rrl == rrl)
+			return (rn);
+	}
+	return (NULL);
+}
+
+/*
+ * Add a node to the head of the singly linked list.
+ */
+static void
+rrn_add(rrwlock_t *rrl)
+{
+	rrw_node_t *rn;
+
+	rn = kmem_alloc(sizeof (*rn), KM_SLEEP);
+	rn->rn_rrl = rrl;
+	rn->rn_next = tsd_get(rrw_tsd_key);
+	VERIFY(tsd_set(rrw_tsd_key, rn) == 0);
+}
+
+/*
+ * If a node is found for 'rrl', then remove the node from this
+ * thread's list and return TRUE; otherwise return FALSE.
+ */
+static boolean_t
+rrn_find_and_remove(rrwlock_t *rrl)
+{
+	rrw_node_t *rn;
+	rrw_node_t *prev = NULL;
+
+	if (refcount_count(&rrl->rr_linked_rcount) == 0)
+		return (B_FALSE);
+
+	for (rn = tsd_get(rrw_tsd_key); rn != NULL; rn = rn->rn_next) {
+		if (rn->rn_rrl == rrl) {
+			if (prev)
+				prev->rn_next = rn->rn_next;
+			else
+				VERIFY(tsd_set(rrw_tsd_key, rn->rn_next) == 0);
+			kmem_free(rn, sizeof (*rn));
+			return (B_TRUE);
+		}
+		prev = rn;
+	}
+	return (B_FALSE);
+}
+
+void
+rrw_init(rrwlock_t *rrl)
+{
+	mutex_init(&rrl->rr_lock, NULL, MUTEX_DEFAULT, NULL);
+	cv_init(&rrl->rr_cv, NULL, CV_DEFAULT, NULL);
+	rrl->rr_writer = NULL;
+	refcount_create(&rrl->rr_anon_rcount);
+	refcount_create(&rrl->rr_linked_rcount);
+	rrl->rr_writer_wanted = B_FALSE;
+}
+
+void
+rrw_destroy(rrwlock_t *rrl)
+{
+	mutex_destroy(&rrl->rr_lock);
+	cv_destroy(&rrl->rr_cv);
+	ASSERT(rrl->rr_writer == NULL);
+	refcount_destroy(&rrl->rr_anon_rcount);
+	refcount_destroy(&rrl->rr_linked_rcount);
+}
+
+static void
+rrw_enter_read(rrwlock_t *rrl, void *tag)
+{
+	mutex_enter(&rrl->rr_lock);
+#if !defined(DEBUG) && defined(_KERNEL)
+	if (!rrl->rr_writer && !rrl->rr_writer_wanted) {
+		rrl->rr_anon_rcount.rc_count++;
+		mutex_exit(&rrl->rr_lock);
+		return;
+	}
+	DTRACE_PROBE(zfs__rrwfastpath__rdmiss);
+#endif
+	ASSERT(rrl->rr_writer != curthread);
+	ASSERT(refcount_count(&rrl->rr_anon_rcount) >= 0);
+
+	while (rrl->rr_writer || (rrl->rr_writer_wanted &&
+	    refcount_is_zero(&rrl->rr_anon_rcount) &&
+	    rrn_find(rrl) == NULL))
+		cv_wait(&rrl->rr_cv, &rrl->rr_lock);
+
+	if (rrl->rr_writer_wanted) {
+		/* may or may not be a re-entrant enter */
+		rrn_add(rrl);
+		(void) refcount_add(&rrl->rr_linked_rcount, tag);
+	} else {
+		(void) refcount_add(&rrl->rr_anon_rcount, tag);
+	}
+	ASSERT(rrl->rr_writer == NULL);
+	mutex_exit(&rrl->rr_lock);
+}
+
+static void
+rrw_enter_write(rrwlock_t *rrl)
+{
+	mutex_enter(&rrl->rr_lock);
+	ASSERT(rrl->rr_writer != curthread);
+
+	while (refcount_count(&rrl->rr_anon_rcount) > 0 ||
+	    refcount_count(&rrl->rr_linked_rcount) > 0 ||
+	    rrl->rr_writer != NULL) {
+		rrl->rr_writer_wanted = B_TRUE;
+		cv_wait(&rrl->rr_cv, &rrl->rr_lock);
+	}
+	rrl->rr_writer_wanted = B_FALSE;
+	rrl->rr_writer = curthread;
+	mutex_exit(&rrl->rr_lock);
+}
+
+void
+rrw_enter(rrwlock_t *rrl, krw_t rw, void *tag)
+{
+	if (rw == RW_READER)
+		rrw_enter_read(rrl, tag);
+	else
+		rrw_enter_write(rrl);
+}
+
+void
+rrw_exit(rrwlock_t *rrl, void *tag)
+{
+	mutex_enter(&rrl->rr_lock);
+#if !defined(DEBUG) && defined(_KERNEL)
+	if (!rrl->rr_writer && rrl->rr_linked_rcount.rc_count == 0) {
+		rrl->rr_anon_rcount.rc_count--;
+		if (rrl->rr_anon_rcount.rc_count == 0)
+			cv_broadcast(&rrl->rr_cv);
+		mutex_exit(&rrl->rr_lock);
+		return;
+	}
+	DTRACE_PROBE(zfs__rrwfastpath__exitmiss);
+#endif
+	ASSERT(!refcount_is_zero(&rrl->rr_anon_rcount) ||
+	    !refcount_is_zero(&rrl->rr_linked_rcount) ||
+	    rrl->rr_writer != NULL);
+
+	if (rrl->rr_writer == NULL) {
+		int64_t count;
+		if (rrn_find_and_remove(rrl))
+			count = refcount_remove(&rrl->rr_linked_rcount, tag);
+		else
+			count = refcount_remove(&rrl->rr_anon_rcount, tag);
+		if (count == 0)
+			cv_broadcast(&rrl->rr_cv);
+	} else {
+		ASSERT(rrl->rr_writer == curthread);
+		ASSERT(refcount_is_zero(&rrl->rr_anon_rcount) &&
+		    refcount_is_zero(&rrl->rr_linked_rcount));
+		rrl->rr_writer = NULL;
+		cv_broadcast(&rrl->rr_cv);
+	}
+	mutex_exit(&rrl->rr_lock);
+}
+
+boolean_t
+rrw_held(rrwlock_t *rrl, krw_t rw)
+{
+	boolean_t held;
+
+	mutex_enter(&rrl->rr_lock);
+	if (rw == RW_WRITER) {
+		held = (rrl->rr_writer == curthread);
+	} else {
+		held = (!refcount_is_zero(&rrl->rr_anon_rcount) ||
+		    !refcount_is_zero(&rrl->rr_linked_rcount));
+	}
+	mutex_exit(&rrl->rr_lock);
+
+	return (held);
+}
diff --git a/uts/common/fs/zfs/sa.c b/uts/common/fs/zfs/sa.c
new file mode 100644
index 000000000000..4cb4546b2511
--- /dev/null
+++ b/uts/common/fs/zfs/sa.c
@@ -0,0 +1,1970 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/dmu.h>
+#include <sys/dmu_impl.h>
+#include <sys/dmu_objset.h>
+#include <sys/dbuf.h>
+#include <sys/dnode.h>
+#include <sys/zap.h>
+#include <sys/sa.h>
+#include <sys/sunddi.h>
+#include <sys/sa_impl.h>
+#include <sys/dnode.h>
+#include <sys/errno.h>
+#include <sys/zfs_context.h>
+
+/*
+ * ZFS System attributes:
+ *
+ * A generic mechanism to allow for arbitrary attributes
+ * to be stored in a dnode.  The data will be stored in the bonus buffer of
+ * the dnode and if necessary a special "spill" block will be used to handle
+ * overflow situations.  The spill block will be sized to fit the data
+ * from 512 - 128K.  When a spill block is used the BP (blkptr_t) for the
+ * spill block is stored at the end of the current bonus buffer.  Any
+ * attributes that would be in the way of the blkptr_t will be relocated
+ * into the spill block.
+ *
+ * Attribute registration:
+ *
+ * Stored persistently on a per dataset basis
+ * a mapping between attribute "string" names and their actual attribute
+ * numeric values, length, and byteswap function.  The names are only used
+ * during registration.  All  attributes are known by their unique attribute
+ * id value.  If an attribute can have a variable size then the value
+ * 0 will be used to indicate this.
+ *
+ * Attribute Layout:
+ *
+ * Attribute layouts are a way to compactly store multiple attributes, but
+ * without taking the overhead associated with managing each attribute
+ * individually.  Since you will typically have the same set of attributes
+ * stored in the same order a single table will be used to represent that
+ * layout.  The ZPL for example will usually have only about 10 different
+ * layouts (regular files, device files, symlinks,
+ * regular files + scanstamp, files/dir with extended attributes, and then
+ * you have the possibility of all of those minus ACL, because it would
+ * be kicked out into the spill block)
+ *
+ * Layouts are simply an array of the attributes and their
+ * ordering i.e. [0, 1, 4, 5, 2]
+ *
+ * Each distinct layout is given a unique layout number and that is whats
+ * stored in the header at the beginning of the SA data buffer.
+ *
+ * A layout only covers a single dbuf (bonus or spill).  If a set of
+ * attributes is split up between the bonus buffer and a spill buffer then
+ * two different layouts will be used.  This allows us to byteswap the
+ * spill without looking at the bonus buffer and keeps the on disk format of
+ * the bonus and spill buffer the same.
+ *
+ * Adding a single attribute will cause the entire set of attributes to
+ * be rewritten and could result in a new layout number being constructed
+ * as part of the rewrite if no such layout exists for the new set of
+ * attribues.  The new attribute will be appended to the end of the already
+ * existing attributes.
+ *
+ * Both the attribute registration and attribute layout information are
+ * stored in normal ZAP attributes.  Their should be a small number of
+ * known layouts and the set of attributes is assumed to typically be quite
+ * small.
+ *
+ * The registered attributes and layout "table" information is maintained
+ * in core and a special "sa_os_t" is attached to the objset_t.
+ *
+ * A special interface is provided to allow for quickly applying
+ * a large set of attributes at once.  sa_replace_all_by_template() is
+ * used to set an array of attributes.  This is used by the ZPL when
+ * creating a brand new file.  The template that is passed into the function
+ * specifies the attribute, size for variable length attributes, location of
+ * data and special "data locator" function if the data isn't in a contiguous
+ * location.
+ *
+ * Byteswap implications:
+ * Since the SA attributes are not entirely self describing we can't do
+ * the normal byteswap processing.  The special ZAP layout attribute and
+ * attribute registration attributes define the byteswap function and the
+ * size of the attributes, unless it is variable sized.
+ * The normal ZFS byteswapping infrastructure assumes you don't need
+ * to read any objects in order to do the necessary byteswapping.  Whereas
+ * SA attributes can only be properly byteswapped if the dataset is opened
+ * and the layout/attribute ZAP attributes are available.  Because of this
+ * the SA attributes will be byteswapped when they are first accessed by
+ * the SA code that will read the SA data.
+ */
+
+typedef void (sa_iterfunc_t)(void *hdr, void *addr, sa_attr_type_t,
+    uint16_t length, int length_idx, boolean_t, void *userp);
+
+static int sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype);
+static void sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab);
+static void *sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype,
+    void *data);
+static void sa_idx_tab_rele(objset_t *os, void *arg);
+static void sa_copy_data(sa_data_locator_t *func, void *start, void *target,
+    int buflen);
+static int sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
+    sa_data_op_t action, sa_data_locator_t *locator, void *datastart,
+    uint16_t buflen, dmu_tx_t *tx);
+
+arc_byteswap_func_t *sa_bswap_table[] = {
+	byteswap_uint64_array,
+	byteswap_uint32_array,
+	byteswap_uint16_array,
+	byteswap_uint8_array,
+	zfs_acl_byteswap,
+};
+
+#define	SA_COPY_DATA(f, s, t, l) \
+	{ \
+		if (f == NULL) { \
+			if (l == 8) { \
+				*(uint64_t *)t = *(uint64_t *)s; \
+			} else if (l == 16) { \
+				*(uint64_t *)t = *(uint64_t *)s; \
+				*(uint64_t *)((uintptr_t)t + 8) = \
+				    *(uint64_t *)((uintptr_t)s + 8); \
+			} else { \
+				bcopy(s, t, l); \
+			} \
+		} else \
+			sa_copy_data(f, s, t, l); \
+	}
+
+/*
+ * This table is fixed and cannot be changed.  Its purpose is to
+ * allow the SA code to work with both old/new ZPL file systems.
+ * It contains the list of legacy attributes.  These attributes aren't
+ * stored in the "attribute" registry zap objects, since older ZPL file systems
+ * won't have the registry.  Only objsets of type ZFS_TYPE_FILESYSTEM will
+ * use this static table.
+ */
+sa_attr_reg_t sa_legacy_attrs[] = {
+	{"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 0},
+	{"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 1},
+	{"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 2},
+	{"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 3},
+	{"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY, 4},
+	{"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY, 5},
+	{"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY, 6},
+	{"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY, 7},
+	{"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY, 8},
+	{"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY, 9},
+	{"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY, 10},
+	{"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY, 11},
+	{"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY, 12},
+	{"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY, 13},
+	{"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY, 14},
+	{"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY, 15},
+};
+
+/*
+ * ZPL legacy layout
+ * This is only used for objects of type DMU_OT_ZNODE
+ */
+sa_attr_type_t sa_legacy_zpl_layout[] = {
+    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
+};
+
+/*
+ * Special dummy layout used for buffers with no attributes.
+ */
+
+sa_attr_type_t sa_dummy_zpl_layout[] = { 0 };
+
+static int sa_legacy_attr_count = 16;
+static kmem_cache_t *sa_cache = NULL;
+
+/*ARGSUSED*/
+static int
+sa_cache_constructor(void *buf, void *unused, int kmflag)
+{
+	sa_handle_t *hdl = buf;
+
+	hdl->sa_bonus_tab = NULL;
+	hdl->sa_spill_tab = NULL;
+	hdl->sa_os = NULL;
+	hdl->sa_userp = NULL;
+	hdl->sa_bonus = NULL;
+	hdl->sa_spill = NULL;
+	mutex_init(&hdl->sa_lock, NULL, MUTEX_DEFAULT, NULL);
+	return (0);
+}
+
+/*ARGSUSED*/
+static void
+sa_cache_destructor(void *buf, void *unused)
+{
+	sa_handle_t *hdl = buf;
+	mutex_destroy(&hdl->sa_lock);
+}
+
+void
+sa_cache_init(void)
+{
+	sa_cache = kmem_cache_create("sa_cache",
+	    sizeof (sa_handle_t), 0, sa_cache_constructor,
+	    sa_cache_destructor, NULL, NULL, NULL, 0);
+}
+
+void
+sa_cache_fini(void)
+{
+	if (sa_cache)
+		kmem_cache_destroy(sa_cache);
+}
+
+static int
+layout_num_compare(const void *arg1, const void *arg2)
+{
+	const sa_lot_t *node1 = arg1;
+	const sa_lot_t *node2 = arg2;
+
+	if (node1->lot_num > node2->lot_num)
+		return (1);
+	else if (node1->lot_num < node2->lot_num)
+		return (-1);
+	return (0);
+}
+
+static int
+layout_hash_compare(const void *arg1, const void *arg2)
+{
+	const sa_lot_t *node1 = arg1;
+	const sa_lot_t *node2 = arg2;
+
+	if (node1->lot_hash > node2->lot_hash)
+		return (1);
+	if (node1->lot_hash < node2->lot_hash)
+		return (-1);
+	if (node1->lot_instance > node2->lot_instance)
+		return (1);
+	if (node1->lot_instance < node2->lot_instance)
+		return (-1);
+	return (0);
+}
+
+boolean_t
+sa_layout_equal(sa_lot_t *tbf, sa_attr_type_t *attrs, int count)
+{
+	int i;
+
+	if (count != tbf->lot_attr_count)
+		return (1);
+
+	for (i = 0; i != count; i++) {
+		if (attrs[i] != tbf->lot_attrs[i])
+			return (1);
+	}
+	return (0);
+}
+
+#define	SA_ATTR_HASH(attr) (zfs_crc64_table[(-1ULL ^ attr) & 0xFF])
+
+static uint64_t
+sa_layout_info_hash(sa_attr_type_t *attrs, int attr_count)
+{
+	int i;
+	uint64_t crc = -1ULL;
+
+	for (i = 0; i != attr_count; i++)
+		crc ^= SA_ATTR_HASH(attrs[i]);
+
+	return (crc);
+}
+
+static int
+sa_get_spill(sa_handle_t *hdl)
+{
+	int rc;
+	if (hdl->sa_spill == NULL) {
+		if ((rc = dmu_spill_hold_existing(hdl->sa_bonus, NULL,
+		    &hdl->sa_spill)) == 0)
+			VERIFY(0 == sa_build_index(hdl, SA_SPILL));
+	} else {
+		rc = 0;
+	}
+
+	return (rc);
+}
+
+/*
+ * Main attribute lookup/update function
+ * returns 0 for success or non zero for failures
+ *
+ * Operates on bulk array, first failure will abort further processing
+ */
+int
+sa_attr_op(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
+    sa_data_op_t data_op, dmu_tx_t *tx)
+{
+	sa_os_t *sa = hdl->sa_os->os_sa;
+	int i;
+	int error = 0;
+	sa_buf_type_t buftypes;
+
+	buftypes = 0;
+
+	ASSERT(count > 0);
+	for (i = 0; i != count; i++) {
+		ASSERT(bulk[i].sa_attr <= hdl->sa_os->os_sa->sa_num_attrs);
+
+		bulk[i].sa_addr = NULL;
+		/* First check the bonus buffer */
+
+		if (hdl->sa_bonus_tab && TOC_ATTR_PRESENT(
+		    hdl->sa_bonus_tab->sa_idx_tab[bulk[i].sa_attr])) {
+			SA_ATTR_INFO(sa, hdl->sa_bonus_tab,
+			    SA_GET_HDR(hdl, SA_BONUS),
+			    bulk[i].sa_attr, bulk[i], SA_BONUS, hdl);
+			if (tx && !(buftypes & SA_BONUS)) {
+				dmu_buf_will_dirty(hdl->sa_bonus, tx);
+				buftypes |= SA_BONUS;
+			}
+		}
+		if (bulk[i].sa_addr == NULL &&
+		    ((error = sa_get_spill(hdl)) == 0)) {
+			if (TOC_ATTR_PRESENT(
+			    hdl->sa_spill_tab->sa_idx_tab[bulk[i].sa_attr])) {
+				SA_ATTR_INFO(sa, hdl->sa_spill_tab,
+				    SA_GET_HDR(hdl, SA_SPILL),
+				    bulk[i].sa_attr, bulk[i], SA_SPILL, hdl);
+				if (tx && !(buftypes & SA_SPILL) &&
+				    bulk[i].sa_size == bulk[i].sa_length) {
+					dmu_buf_will_dirty(hdl->sa_spill, tx);
+					buftypes |= SA_SPILL;
+				}
+			}
+		}
+		if (error && error != ENOENT) {
+			return ((error == ECKSUM) ? EIO : error);
+		}
+
+		switch (data_op) {
+		case SA_LOOKUP:
+			if (bulk[i].sa_addr == NULL)
+				return (ENOENT);
+			if (bulk[i].sa_data) {
+				SA_COPY_DATA(bulk[i].sa_data_func,
+				    bulk[i].sa_addr, bulk[i].sa_data,
+				    bulk[i].sa_size);
+			}
+			continue;
+
+		case SA_UPDATE:
+			/* existing rewrite of attr */
+			if (bulk[i].sa_addr &&
+			    bulk[i].sa_size == bulk[i].sa_length) {
+				SA_COPY_DATA(bulk[i].sa_data_func,
+				    bulk[i].sa_data, bulk[i].sa_addr,
+				    bulk[i].sa_length);
+				continue;
+			} else if (bulk[i].sa_addr) { /* attr size change */
+				error = sa_modify_attrs(hdl, bulk[i].sa_attr,
+				    SA_REPLACE, bulk[i].sa_data_func,
+				    bulk[i].sa_data, bulk[i].sa_length, tx);
+			} else { /* adding new attribute */
+				error = sa_modify_attrs(hdl, bulk[i].sa_attr,
+				    SA_ADD, bulk[i].sa_data_func,
+				    bulk[i].sa_data, bulk[i].sa_length, tx);
+			}
+			if (error)
+				return (error);
+			break;
+		}
+	}
+	return (error);
+}
+
+static sa_lot_t *
+sa_add_layout_entry(objset_t *os, sa_attr_type_t *attrs, int attr_count,
+    uint64_t lot_num, uint64_t hash, boolean_t zapadd, dmu_tx_t *tx)
+{
+	sa_os_t *sa = os->os_sa;
+	sa_lot_t *tb, *findtb;
+	int i;
+	avl_index_t loc;
+
+	ASSERT(MUTEX_HELD(&sa->sa_lock));
+	tb = kmem_zalloc(sizeof (sa_lot_t), KM_SLEEP);
+	tb->lot_attr_count = attr_count;
+	tb->lot_attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
+	    KM_SLEEP);
+	bcopy(attrs, tb->lot_attrs, sizeof (sa_attr_type_t) * attr_count);
+	tb->lot_num = lot_num;
+	tb->lot_hash = hash;
+	tb->lot_instance = 0;
+
+	if (zapadd) {
+		char attr_name[8];
+
+		if (sa->sa_layout_attr_obj == 0) {
+			sa->sa_layout_attr_obj = zap_create(os,
+			    DMU_OT_SA_ATTR_LAYOUTS, DMU_OT_NONE, 0, tx);
+			VERIFY(zap_add(os, sa->sa_master_obj, SA_LAYOUTS, 8, 1,
+			    &sa->sa_layout_attr_obj, tx) == 0);
+		}
+
+		(void) snprintf(attr_name, sizeof (attr_name),
+		    "%d", (int)lot_num);
+		VERIFY(0 == zap_update(os, os->os_sa->sa_layout_attr_obj,
+		    attr_name, 2, attr_count, attrs, tx));
+	}
+
+	list_create(&tb->lot_idx_tab, sizeof (sa_idx_tab_t),
+	    offsetof(sa_idx_tab_t, sa_next));
+
+	for (i = 0; i != attr_count; i++) {
+		if (sa->sa_attr_table[tb->lot_attrs[i]].sa_length == 0)
+			tb->lot_var_sizes++;
+	}
+
+	avl_add(&sa->sa_layout_num_tree, tb);
+
+	/* verify we don't have a hash collision */
+	if ((findtb = avl_find(&sa->sa_layout_hash_tree, tb, &loc)) != NULL) {
+		for (; findtb && findtb->lot_hash == hash;
+		    findtb = AVL_NEXT(&sa->sa_layout_hash_tree, findtb)) {
+			if (findtb->lot_instance != tb->lot_instance)
+				break;
+			tb->lot_instance++;
+		}
+	}
+	avl_add(&sa->sa_layout_hash_tree, tb);
+	return (tb);
+}
+
+static void
+sa_find_layout(objset_t *os, uint64_t hash, sa_attr_type_t *attrs,
+    int count, dmu_tx_t *tx, sa_lot_t **lot)
+{
+	sa_lot_t *tb, tbsearch;
+	avl_index_t loc;
+	sa_os_t *sa = os->os_sa;
+	boolean_t found = B_FALSE;
+
+	mutex_enter(&sa->sa_lock);
+	tbsearch.lot_hash = hash;
+	tbsearch.lot_instance = 0;
+	tb = avl_find(&sa->sa_layout_hash_tree, &tbsearch, &loc);
+	if (tb) {
+		for (; tb && tb->lot_hash == hash;
+		    tb = AVL_NEXT(&sa->sa_layout_hash_tree, tb)) {
+			if (sa_layout_equal(tb, attrs, count) == 0) {
+				found = B_TRUE;
+				break;
+			}
+		}
+	}
+	if (!found) {
+		tb = sa_add_layout_entry(os, attrs, count,
+		    avl_numnodes(&sa->sa_layout_num_tree), hash, B_TRUE, tx);
+	}
+	mutex_exit(&sa->sa_lock);
+	*lot = tb;
+}
+
+static int
+sa_resize_spill(sa_handle_t *hdl, uint32_t size, dmu_tx_t *tx)
+{
+	int error;
+	uint32_t blocksize;
+
+	if (size == 0) {
+		blocksize = SPA_MINBLOCKSIZE;
+	} else if (size > SPA_MAXBLOCKSIZE) {
+		ASSERT(0);
+		return (EFBIG);
+	} else {
+		blocksize = P2ROUNDUP_TYPED(size, SPA_MINBLOCKSIZE, uint32_t);
+	}
+
+	error = dbuf_spill_set_blksz(hdl->sa_spill, blocksize, tx);
+	ASSERT(error == 0);
+	return (error);
+}
+
+static void
+sa_copy_data(sa_data_locator_t *func, void *datastart, void *target, int buflen)
+{
+	if (func == NULL) {
+		bcopy(datastart, target, buflen);
+	} else {
+		boolean_t start;
+		int bytes;
+		void *dataptr;
+		void *saptr = target;
+		uint32_t length;
+
+		start = B_TRUE;
+		bytes = 0;
+		while (bytes < buflen) {
+			func(&dataptr, &length, buflen, start, datastart);
+			bcopy(dataptr, saptr, length);
+			saptr = (void *)((caddr_t)saptr + length);
+			bytes += length;
+			start = B_FALSE;
+		}
+	}
+}
+
+/*
+ * Determine several different sizes
+ * first the sa header size
+ * the number of bytes to be stored
+ * if spill would occur the index in the attribute array is returned
+ *
+ * the boolean will_spill will be set when spilling is necessary.  It
+ * is only set when the buftype is SA_BONUS
+ */
+static int
+sa_find_sizes(sa_os_t *sa, sa_bulk_attr_t *attr_desc, int attr_count,
+    dmu_buf_t *db, sa_buf_type_t buftype, int *index, int *total,
+    boolean_t *will_spill)
+{
+	int var_size = 0;
+	int i;
+	int full_space;
+	int hdrsize;
+	boolean_t done = B_FALSE;
+
+	if (buftype == SA_BONUS && sa->sa_force_spill) {
+		*total = 0;
+		*index = 0;
+		*will_spill = B_TRUE;
+		return (0);
+	}
+
+	*index = -1;
+	*total = 0;
+
+	if (buftype == SA_BONUS)
+		*will_spill = B_FALSE;
+
+	hdrsize = (SA_BONUSTYPE_FROM_DB(db) == DMU_OT_ZNODE) ? 0 :
+	    sizeof (sa_hdr_phys_t);
+
+	full_space = (buftype == SA_BONUS) ? DN_MAX_BONUSLEN : db->db_size;
+
+	for (i = 0; i != attr_count; i++) {
+		boolean_t is_var_sz;
+
+		*total += attr_desc[i].sa_length;
+		if (done)
+			goto next;
+
+		is_var_sz = (SA_REGISTERED_LEN(sa, attr_desc[i].sa_attr) == 0);
+		if (is_var_sz) {
+			var_size++;
+		}
+
+		if (is_var_sz && var_size > 1) {
+			if (P2ROUNDUP(hdrsize + sizeof (uint16_t), 8) +
+			    *total < full_space) {
+				hdrsize += sizeof (uint16_t);
+			} else {
+				done = B_TRUE;
+				*index = i;
+				if (buftype == SA_BONUS)
+					*will_spill = B_TRUE;
+				continue;
+			}
+		}
+
+		/*
+		 * find index of where spill *could* occur.
+		 * Then continue to count of remainder attribute
+		 * space.  The sum is used later for sizing bonus
+		 * and spill buffer.
+		 */
+		if (buftype == SA_BONUS && *index == -1 &&
+		    P2ROUNDUP(*total + hdrsize, 8) >
+		    (full_space - sizeof (blkptr_t))) {
+			*index = i;
+			done = B_TRUE;
+		}
+
+next:
+		if (P2ROUNDUP(*total + hdrsize, 8) > full_space &&
+		    buftype == SA_BONUS)
+			*will_spill = B_TRUE;
+	}
+
+	hdrsize = P2ROUNDUP(hdrsize, 8);
+	return (hdrsize);
+}
+
+#define	BUF_SPACE_NEEDED(total, header) (total + header)
+
+/*
+ * Find layout that corresponds to ordering of attributes
+ * If not found a new layout number is created and added to
+ * persistent layout tables.
+ */
+static int
+sa_build_layouts(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, int attr_count,
+    dmu_tx_t *tx)
+{
+	sa_os_t *sa = hdl->sa_os->os_sa;
+	uint64_t hash;
+	sa_buf_type_t buftype;
+	sa_hdr_phys_t *sahdr;
+	void *data_start;
+	int buf_space;
+	sa_attr_type_t *attrs, *attrs_start;
+	int i, lot_count;
+	int hdrsize, spillhdrsize;
+	int used;
+	dmu_object_type_t bonustype;
+	sa_lot_t *lot;
+	int len_idx;
+	int spill_used;
+	boolean_t spilling;
+
+	dmu_buf_will_dirty(hdl->sa_bonus, tx);
+	bonustype = SA_BONUSTYPE_FROM_DB(hdl->sa_bonus);
+
+	/* first determine bonus header size and sum of all attributes */
+	hdrsize = sa_find_sizes(sa, attr_desc, attr_count, hdl->sa_bonus,
+	    SA_BONUS, &i, &used, &spilling);
+
+	if (used > SPA_MAXBLOCKSIZE)
+		return (EFBIG);
+
+	VERIFY(0 == dmu_set_bonus(hdl->sa_bonus, spilling ?
+	    MIN(DN_MAX_BONUSLEN - sizeof (blkptr_t), used + hdrsize) :
+	    used + hdrsize, tx));
+
+	ASSERT((bonustype == DMU_OT_ZNODE && spilling == 0) ||
+	    bonustype == DMU_OT_SA);
+
+	/* setup and size spill buffer when needed */
+	if (spilling) {
+		boolean_t dummy;
+
+		if (hdl->sa_spill == NULL) {
+			VERIFY(dmu_spill_hold_by_bonus(hdl->sa_bonus, NULL,
+			    &hdl->sa_spill) == 0);
+		}
+		dmu_buf_will_dirty(hdl->sa_spill, tx);
+
+		spillhdrsize = sa_find_sizes(sa, &attr_desc[i],
+		    attr_count - i, hdl->sa_spill, SA_SPILL, &i,
+		    &spill_used, &dummy);
+
+		if (spill_used > SPA_MAXBLOCKSIZE)
+			return (EFBIG);
+
+		buf_space = hdl->sa_spill->db_size - spillhdrsize;
+		if (BUF_SPACE_NEEDED(spill_used, spillhdrsize) >
+		    hdl->sa_spill->db_size)
+			VERIFY(0 == sa_resize_spill(hdl,
+			    BUF_SPACE_NEEDED(spill_used, spillhdrsize), tx));
+	}
+
+	/* setup starting pointers to lay down data */
+	data_start = (void *)((uintptr_t)hdl->sa_bonus->db_data + hdrsize);
+	sahdr = (sa_hdr_phys_t *)hdl->sa_bonus->db_data;
+	buftype = SA_BONUS;
+
+	if (spilling)
+		buf_space = (sa->sa_force_spill) ?
+		    0 : SA_BLKPTR_SPACE - hdrsize;
+	else
+		buf_space = hdl->sa_bonus->db_size - hdrsize;
+
+	attrs_start = attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
+	    KM_SLEEP);
+	lot_count = 0;
+
+	for (i = 0, len_idx = 0, hash = -1ULL; i != attr_count; i++) {
+		uint16_t length;
+
+		attrs[i] = attr_desc[i].sa_attr;
+		length = SA_REGISTERED_LEN(sa, attrs[i]);
+		if (length == 0)
+			length = attr_desc[i].sa_length;
+
+		if (buf_space < length) {  /* switch to spill buffer */
+			VERIFY(bonustype == DMU_OT_SA);
+			if (buftype == SA_BONUS && !sa->sa_force_spill) {
+				sa_find_layout(hdl->sa_os, hash, attrs_start,
+				    lot_count, tx, &lot);
+				SA_SET_HDR(sahdr, lot->lot_num, hdrsize);
+			}
+
+			buftype = SA_SPILL;
+			hash = -1ULL;
+			len_idx = 0;
+
+			sahdr = (sa_hdr_phys_t *)hdl->sa_spill->db_data;
+			sahdr->sa_magic = SA_MAGIC;
+			data_start = (void *)((uintptr_t)sahdr +
+			    spillhdrsize);
+			attrs_start = &attrs[i];
+			buf_space = hdl->sa_spill->db_size - spillhdrsize;
+			lot_count = 0;
+		}
+		hash ^= SA_ATTR_HASH(attrs[i]);
+		attr_desc[i].sa_addr = data_start;
+		attr_desc[i].sa_size = length;
+		SA_COPY_DATA(attr_desc[i].sa_data_func, attr_desc[i].sa_data,
+		    data_start, length);
+		if (sa->sa_attr_table[attrs[i]].sa_length == 0) {
+			sahdr->sa_lengths[len_idx++] = length;
+		}
+		data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
+		    length), 8);
+		buf_space -= P2ROUNDUP(length, 8);
+		lot_count++;
+	}
+
+	sa_find_layout(hdl->sa_os, hash, attrs_start, lot_count, tx, &lot);
+
+	/*
+	 * Verify that old znodes always have layout number 0.
+	 * Must be DMU_OT_SA for arbitrary layouts
+	 */
+	VERIFY((bonustype == DMU_OT_ZNODE && lot->lot_num == 0) ||
+	    (bonustype == DMU_OT_SA && lot->lot_num > 1));
+
+	if (bonustype == DMU_OT_SA) {
+		SA_SET_HDR(sahdr, lot->lot_num,
+		    buftype == SA_BONUS ? hdrsize : spillhdrsize);
+	}
+
+	kmem_free(attrs, sizeof (sa_attr_type_t) * attr_count);
+	if (hdl->sa_bonus_tab) {
+		sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
+		hdl->sa_bonus_tab = NULL;
+	}
+	if (!sa->sa_force_spill)
+		VERIFY(0 == sa_build_index(hdl, SA_BONUS));
+	if (hdl->sa_spill) {
+		sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
+		if (!spilling) {
+			/*
+			 * remove spill block that is no longer needed.
+			 */
+			dmu_buf_rele(hdl->sa_spill, NULL);
+			hdl->sa_spill = NULL;
+			hdl->sa_spill_tab = NULL;
+			VERIFY(0 == dmu_rm_spill(hdl->sa_os,
+			    sa_handle_object(hdl), tx));
+		} else {
+			VERIFY(0 == sa_build_index(hdl, SA_SPILL));
+		}
+	}
+
+	return (0);
+}
+
+static void
+sa_free_attr_table(sa_os_t *sa)
+{
+	int i;
+
+	if (sa->sa_attr_table == NULL)
+		return;
+
+	for (i = 0; i != sa->sa_num_attrs; i++) {
+		if (sa->sa_attr_table[i].sa_name)
+			kmem_free(sa->sa_attr_table[i].sa_name,
+			    strlen(sa->sa_attr_table[i].sa_name) + 1);
+	}
+
+	kmem_free(sa->sa_attr_table,
+	    sizeof (sa_attr_table_t) * sa->sa_num_attrs);
+
+	sa->sa_attr_table = NULL;
+}
+
+static int
+sa_attr_table_setup(objset_t *os, sa_attr_reg_t *reg_attrs, int count)
+{
+	sa_os_t *sa = os->os_sa;
+	uint64_t sa_attr_count = 0;
+	uint64_t sa_reg_count;
+	int error = 0;
+	uint64_t attr_value;
+	sa_attr_table_t *tb;
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	int registered_count = 0;
+	int i;
+	dmu_objset_type_t ostype = dmu_objset_type(os);
+
+	sa->sa_user_table =
+	    kmem_zalloc(count * sizeof (sa_attr_type_t), KM_SLEEP);
+	sa->sa_user_table_sz = count * sizeof (sa_attr_type_t);
+
+	if (sa->sa_reg_attr_obj != 0) {
+		error = zap_count(os, sa->sa_reg_attr_obj,
+		    &sa_attr_count);
+
+		/*
+		 * Make sure we retrieved a count and that it isn't zero
+		 */
+		if (error || (error == 0 && sa_attr_count == 0)) {
+			if (error == 0)
+				error = EINVAL;
+			goto bail;
+		}
+		sa_reg_count = sa_attr_count;
+	}
+
+	if (ostype == DMU_OST_ZFS && sa_attr_count == 0)
+		sa_attr_count += sa_legacy_attr_count;
+
+	/* Allocate attribute numbers for attributes that aren't registered */
+	for (i = 0; i != count; i++) {
+		boolean_t found = B_FALSE;
+		int j;
+
+		if (ostype == DMU_OST_ZFS) {
+			for (j = 0; j != sa_legacy_attr_count; j++) {
+				if (strcmp(reg_attrs[i].sa_name,
+				    sa_legacy_attrs[j].sa_name) == 0) {
+					sa->sa_user_table[i] =
+					    sa_legacy_attrs[j].sa_attr;
+					found = B_TRUE;
+				}
+			}
+		}
+		if (found)
+			continue;
+
+		if (sa->sa_reg_attr_obj)
+			error = zap_lookup(os, sa->sa_reg_attr_obj,
+			    reg_attrs[i].sa_name, 8, 1, &attr_value);
+		else
+			error = ENOENT;
+		switch (error) {
+		case ENOENT:
+			sa->sa_user_table[i] = (sa_attr_type_t)sa_attr_count;
+			sa_attr_count++;
+			break;
+		case 0:
+			sa->sa_user_table[i] = ATTR_NUM(attr_value);
+			break;
+		default:
+			goto bail;
+		}
+	}
+
+	sa->sa_num_attrs = sa_attr_count;
+	tb = sa->sa_attr_table =
+	    kmem_zalloc(sizeof (sa_attr_table_t) * sa_attr_count, KM_SLEEP);
+
+	/*
+	 * Attribute table is constructed from requested attribute list,
+	 * previously foreign registered attributes, and also the legacy
+	 * ZPL set of attributes.
+	 */
+
+	if (sa->sa_reg_attr_obj) {
+		for (zap_cursor_init(&zc, os, sa->sa_reg_attr_obj);
+		    (error = zap_cursor_retrieve(&zc, &za)) == 0;
+		    zap_cursor_advance(&zc)) {
+			uint64_t value;
+			value  = za.za_first_integer;
+
+			registered_count++;
+			tb[ATTR_NUM(value)].sa_attr = ATTR_NUM(value);
+			tb[ATTR_NUM(value)].sa_length = ATTR_LENGTH(value);
+			tb[ATTR_NUM(value)].sa_byteswap = ATTR_BSWAP(value);
+			tb[ATTR_NUM(value)].sa_registered = B_TRUE;
+
+			if (tb[ATTR_NUM(value)].sa_name) {
+				continue;
+			}
+			tb[ATTR_NUM(value)].sa_name =
+			    kmem_zalloc(strlen(za.za_name) +1, KM_SLEEP);
+			(void) strlcpy(tb[ATTR_NUM(value)].sa_name, za.za_name,
+			    strlen(za.za_name) +1);
+		}
+		zap_cursor_fini(&zc);
+		/*
+		 * Make sure we processed the correct number of registered
+		 * attributes
+		 */
+		if (registered_count != sa_reg_count) {
+			ASSERT(error != 0);
+			goto bail;
+		}
+
+	}
+
+	if (ostype == DMU_OST_ZFS) {
+		for (i = 0; i != sa_legacy_attr_count; i++) {
+			if (tb[i].sa_name)
+				continue;
+			tb[i].sa_attr = sa_legacy_attrs[i].sa_attr;
+			tb[i].sa_length = sa_legacy_attrs[i].sa_length;
+			tb[i].sa_byteswap = sa_legacy_attrs[i].sa_byteswap;
+			tb[i].sa_registered = B_FALSE;
+			tb[i].sa_name =
+			    kmem_zalloc(strlen(sa_legacy_attrs[i].sa_name) +1,
+			    KM_SLEEP);
+			(void) strlcpy(tb[i].sa_name,
+			    sa_legacy_attrs[i].sa_name,
+			    strlen(sa_legacy_attrs[i].sa_name) + 1);
+		}
+	}
+
+	for (i = 0; i != count; i++) {
+		sa_attr_type_t attr_id;
+
+		attr_id = sa->sa_user_table[i];
+		if (tb[attr_id].sa_name)
+			continue;
+
+		tb[attr_id].sa_length = reg_attrs[i].sa_length;
+		tb[attr_id].sa_byteswap = reg_attrs[i].sa_byteswap;
+		tb[attr_id].sa_attr = attr_id;
+		tb[attr_id].sa_name =
+		    kmem_zalloc(strlen(reg_attrs[i].sa_name) + 1, KM_SLEEP);
+		(void) strlcpy(tb[attr_id].sa_name, reg_attrs[i].sa_name,
+		    strlen(reg_attrs[i].sa_name) + 1);
+	}
+
+	sa->sa_need_attr_registration =
+	    (sa_attr_count != registered_count);
+
+	return (0);
+bail:
+	kmem_free(sa->sa_user_table, count * sizeof (sa_attr_type_t));
+	sa->sa_user_table = NULL;
+	sa_free_attr_table(sa);
+	return ((error != 0) ? error : EINVAL);
+}
+
+int
+sa_setup(objset_t *os, uint64_t sa_obj, sa_attr_reg_t *reg_attrs, int count,
+    sa_attr_type_t **user_table)
+{
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	sa_os_t *sa;
+	dmu_objset_type_t ostype = dmu_objset_type(os);
+	sa_attr_type_t *tb;
+	int error;
+
+	mutex_enter(&os->os_lock);
+	if (os->os_sa) {
+		mutex_enter(&os->os_sa->sa_lock);
+		mutex_exit(&os->os_lock);
+		tb = os->os_sa->sa_user_table;
+		mutex_exit(&os->os_sa->sa_lock);
+		*user_table = tb;
+		return (0);
+	}
+
+	sa = kmem_zalloc(sizeof (sa_os_t), KM_SLEEP);
+	mutex_init(&sa->sa_lock, NULL, MUTEX_DEFAULT, NULL);
+	sa->sa_master_obj = sa_obj;
+
+	os->os_sa = sa;
+	mutex_enter(&sa->sa_lock);
+	mutex_exit(&os->os_lock);
+	avl_create(&sa->sa_layout_num_tree, layout_num_compare,
+	    sizeof (sa_lot_t), offsetof(sa_lot_t, lot_num_node));
+	avl_create(&sa->sa_layout_hash_tree, layout_hash_compare,
+	    sizeof (sa_lot_t), offsetof(sa_lot_t, lot_hash_node));
+
+	if (sa_obj) {
+		error = zap_lookup(os, sa_obj, SA_LAYOUTS,
+		    8, 1, &sa->sa_layout_attr_obj);
+		if (error != 0 && error != ENOENT)
+			goto fail;
+		error = zap_lookup(os, sa_obj, SA_REGISTRY,
+		    8, 1, &sa->sa_reg_attr_obj);
+		if (error != 0 && error != ENOENT)
+			goto fail;
+	}
+
+	if ((error = sa_attr_table_setup(os, reg_attrs, count)) != 0)
+		goto fail;
+
+	if (sa->sa_layout_attr_obj != 0) {
+		uint64_t layout_count;
+
+		error = zap_count(os, sa->sa_layout_attr_obj,
+		    &layout_count);
+
+		/*
+		 * Layout number count should be > 0
+		 */
+		if (error || (error == 0 && layout_count == 0)) {
+			if (error == 0)
+				error = EINVAL;
+			goto fail;
+		}
+
+		for (zap_cursor_init(&zc, os, sa->sa_layout_attr_obj);
+		    (error = zap_cursor_retrieve(&zc, &za)) == 0;
+		    zap_cursor_advance(&zc)) {
+			sa_attr_type_t *lot_attrs;
+			uint64_t lot_num;
+
+			lot_attrs = kmem_zalloc(sizeof (sa_attr_type_t) *
+			    za.za_num_integers, KM_SLEEP);
+
+			if ((error = (zap_lookup(os, sa->sa_layout_attr_obj,
+			    za.za_name, 2, za.za_num_integers,
+			    lot_attrs))) != 0) {
+				kmem_free(lot_attrs, sizeof (sa_attr_type_t) *
+				    za.za_num_integers);
+				break;
+			}
+			VERIFY(ddi_strtoull(za.za_name, NULL, 10,
+			    (unsigned long long *)&lot_num) == 0);
+
+			(void) sa_add_layout_entry(os, lot_attrs,
+			    za.za_num_integers, lot_num,
+			    sa_layout_info_hash(lot_attrs,
+			    za.za_num_integers), B_FALSE, NULL);
+			kmem_free(lot_attrs, sizeof (sa_attr_type_t) *
+			    za.za_num_integers);
+		}
+		zap_cursor_fini(&zc);
+
+		/*
+		 * Make sure layout count matches number of entries added
+		 * to AVL tree
+		 */
+		if (avl_numnodes(&sa->sa_layout_num_tree) != layout_count) {
+			ASSERT(error != 0);
+			goto fail;
+		}
+	}
+
+	/* Add special layout number for old ZNODES */
+	if (ostype == DMU_OST_ZFS) {
+		(void) sa_add_layout_entry(os, sa_legacy_zpl_layout,
+		    sa_legacy_attr_count, 0,
+		    sa_layout_info_hash(sa_legacy_zpl_layout,
+		    sa_legacy_attr_count), B_FALSE, NULL);
+
+		(void) sa_add_layout_entry(os, sa_dummy_zpl_layout, 0, 1,
+		    0, B_FALSE, NULL);
+	}
+	*user_table = os->os_sa->sa_user_table;
+	mutex_exit(&sa->sa_lock);
+	return (0);
+fail:
+	os->os_sa = NULL;
+	sa_free_attr_table(sa);
+	if (sa->sa_user_table)
+		kmem_free(sa->sa_user_table, sa->sa_user_table_sz);
+	mutex_exit(&sa->sa_lock);
+	kmem_free(sa, sizeof (sa_os_t));
+	return ((error == ECKSUM) ? EIO : error);
+}
+
+void
+sa_tear_down(objset_t *os)
+{
+	sa_os_t *sa = os->os_sa;
+	sa_lot_t *layout;
+	void *cookie;
+
+	kmem_free(sa->sa_user_table, sa->sa_user_table_sz);
+
+	/* Free up attr table */
+
+	sa_free_attr_table(sa);
+
+	cookie = NULL;
+	while (layout = avl_destroy_nodes(&sa->sa_layout_hash_tree, &cookie)) {
+		sa_idx_tab_t *tab;
+		while (tab = list_head(&layout->lot_idx_tab)) {
+			ASSERT(refcount_count(&tab->sa_refcount));
+			sa_idx_tab_rele(os, tab);
+		}
+	}
+
+	cookie = NULL;
+	while (layout = avl_destroy_nodes(&sa->sa_layout_num_tree, &cookie)) {
+		kmem_free(layout->lot_attrs,
+		    sizeof (sa_attr_type_t) * layout->lot_attr_count);
+		kmem_free(layout, sizeof (sa_lot_t));
+	}
+
+	avl_destroy(&sa->sa_layout_hash_tree);
+	avl_destroy(&sa->sa_layout_num_tree);
+
+	kmem_free(sa, sizeof (sa_os_t));
+	os->os_sa = NULL;
+}
+
+void
+sa_build_idx_tab(void *hdr, void *attr_addr, sa_attr_type_t attr,
+    uint16_t length, int length_idx, boolean_t var_length, void *userp)
+{
+	sa_idx_tab_t *idx_tab = userp;
+
+	if (var_length) {
+		ASSERT(idx_tab->sa_variable_lengths);
+		idx_tab->sa_variable_lengths[length_idx] = length;
+	}
+	TOC_ATTR_ENCODE(idx_tab->sa_idx_tab[attr], length_idx,
+	    (uint32_t)((uintptr_t)attr_addr - (uintptr_t)hdr));
+}
+
+static void
+sa_attr_iter(objset_t *os, sa_hdr_phys_t *hdr, dmu_object_type_t type,
+    sa_iterfunc_t func, sa_lot_t *tab, void *userp)
+{
+	void *data_start;
+	sa_lot_t *tb = tab;
+	sa_lot_t search;
+	avl_index_t loc;
+	sa_os_t *sa = os->os_sa;
+	int i;
+	uint16_t *length_start = NULL;
+	uint8_t length_idx = 0;
+
+	if (tab == NULL) {
+		search.lot_num = SA_LAYOUT_NUM(hdr, type);
+		tb = avl_find(&sa->sa_layout_num_tree, &search, &loc);
+		ASSERT(tb);
+	}
+
+	if (IS_SA_BONUSTYPE(type)) {
+		data_start = (void *)P2ROUNDUP(((uintptr_t)hdr +
+		    offsetof(sa_hdr_phys_t, sa_lengths) +
+		    (sizeof (uint16_t) * tb->lot_var_sizes)), 8);
+		length_start = hdr->sa_lengths;
+	} else {
+		data_start = hdr;
+	}
+
+	for (i = 0; i != tb->lot_attr_count; i++) {
+		int attr_length, reg_length;
+		uint8_t idx_len;
+
+		reg_length = sa->sa_attr_table[tb->lot_attrs[i]].sa_length;
+		if (reg_length) {
+			attr_length = reg_length;
+			idx_len = 0;
+		} else {
+			attr_length = length_start[length_idx];
+			idx_len = length_idx++;
+		}
+
+		func(hdr, data_start, tb->lot_attrs[i], attr_length,
+		    idx_len, reg_length == 0 ? B_TRUE : B_FALSE, userp);
+
+		data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
+		    attr_length), 8);
+	}
+}
+
+/*ARGSUSED*/
+void
+sa_byteswap_cb(void *hdr, void *attr_addr, sa_attr_type_t attr,
+    uint16_t length, int length_idx, boolean_t variable_length, void *userp)
+{
+	sa_handle_t *hdl = userp;
+	sa_os_t *sa = hdl->sa_os->os_sa;
+
+	sa_bswap_table[sa->sa_attr_table[attr].sa_byteswap](attr_addr, length);
+}
+
+void
+sa_byteswap(sa_handle_t *hdl, sa_buf_type_t buftype)
+{
+	sa_hdr_phys_t *sa_hdr_phys = SA_GET_HDR(hdl, buftype);
+	dmu_buf_impl_t *db;
+	sa_os_t *sa = hdl->sa_os->os_sa;
+	int num_lengths = 1;
+	int i;
+
+	ASSERT(MUTEX_HELD(&sa->sa_lock));
+	if (sa_hdr_phys->sa_magic == SA_MAGIC)
+		return;
+
+	db = SA_GET_DB(hdl, buftype);
+
+	if (buftype == SA_SPILL) {
+		arc_release(db->db_buf, NULL);
+		arc_buf_thaw(db->db_buf);
+	}
+
+	sa_hdr_phys->sa_magic = BSWAP_32(sa_hdr_phys->sa_magic);
+	sa_hdr_phys->sa_layout_info = BSWAP_16(sa_hdr_phys->sa_layout_info);
+
+	/*
+	 * Determine number of variable lenghts in header
+	 * The standard 8 byte header has one for free and a
+	 * 16 byte header would have 4 + 1;
+	 */
+	if (SA_HDR_SIZE(sa_hdr_phys) > 8)
+		num_lengths += (SA_HDR_SIZE(sa_hdr_phys) - 8) >> 1;
+	for (i = 0; i != num_lengths; i++)
+		sa_hdr_phys->sa_lengths[i] =
+		    BSWAP_16(sa_hdr_phys->sa_lengths[i]);
+
+	sa_attr_iter(hdl->sa_os, sa_hdr_phys, DMU_OT_SA,
+	    sa_byteswap_cb, NULL, hdl);
+
+	if (buftype == SA_SPILL)
+		arc_buf_freeze(((dmu_buf_impl_t *)hdl->sa_spill)->db_buf);
+}
+
+static int
+sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype)
+{
+	sa_hdr_phys_t *sa_hdr_phys;
+	dmu_buf_impl_t *db = SA_GET_DB(hdl, buftype);
+	dmu_object_type_t bonustype = SA_BONUSTYPE_FROM_DB(db);
+	sa_os_t *sa = hdl->sa_os->os_sa;
+	sa_idx_tab_t *idx_tab;
+
+	sa_hdr_phys = SA_GET_HDR(hdl, buftype);
+
+	mutex_enter(&sa->sa_lock);
+
+	/* Do we need to byteswap? */
+
+	/* only check if not old znode */
+	if (IS_SA_BONUSTYPE(bonustype) && sa_hdr_phys->sa_magic != SA_MAGIC &&
+	    sa_hdr_phys->sa_magic != 0) {
+		VERIFY(BSWAP_32(sa_hdr_phys->sa_magic) == SA_MAGIC);
+		sa_byteswap(hdl, buftype);
+	}
+
+	idx_tab = sa_find_idx_tab(hdl->sa_os, bonustype, sa_hdr_phys);
+
+	if (buftype == SA_BONUS)
+		hdl->sa_bonus_tab = idx_tab;
+	else
+		hdl->sa_spill_tab = idx_tab;
+
+	mutex_exit(&sa->sa_lock);
+	return (0);
+}
+
+/*ARGSUSED*/
+void
+sa_evict(dmu_buf_t *db, void *sap)
+{
+	panic("evicting sa dbuf %p\n", (void *)db);
+}
+
+static void
+sa_idx_tab_rele(objset_t *os, void *arg)
+{
+	sa_os_t *sa = os->os_sa;
+	sa_idx_tab_t *idx_tab = arg;
+
+	if (idx_tab == NULL)
+		return;
+
+	mutex_enter(&sa->sa_lock);
+	if (refcount_remove(&idx_tab->sa_refcount, NULL) == 0) {
+		list_remove(&idx_tab->sa_layout->lot_idx_tab, idx_tab);
+		if (idx_tab->sa_variable_lengths)
+			kmem_free(idx_tab->sa_variable_lengths,
+			    sizeof (uint16_t) *
+			    idx_tab->sa_layout->lot_var_sizes);
+		refcount_destroy(&idx_tab->sa_refcount);
+		kmem_free(idx_tab->sa_idx_tab,
+		    sizeof (uint32_t) * sa->sa_num_attrs);
+		kmem_free(idx_tab, sizeof (sa_idx_tab_t));
+	}
+	mutex_exit(&sa->sa_lock);
+}
+
+static void
+sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab)
+{
+	sa_os_t *sa = os->os_sa;
+
+	ASSERT(MUTEX_HELD(&sa->sa_lock));
+	(void) refcount_add(&idx_tab->sa_refcount, NULL);
+}
+
+void
+sa_handle_destroy(sa_handle_t *hdl)
+{
+	mutex_enter(&hdl->sa_lock);
+	(void) dmu_buf_update_user((dmu_buf_t *)hdl->sa_bonus, hdl,
+	    NULL, NULL, NULL);
+
+	if (hdl->sa_bonus_tab) {
+		sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
+		hdl->sa_bonus_tab = NULL;
+	}
+	if (hdl->sa_spill_tab) {
+		sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
+		hdl->sa_spill_tab = NULL;
+	}
+
+	dmu_buf_rele(hdl->sa_bonus, NULL);
+
+	if (hdl->sa_spill)
+		dmu_buf_rele((dmu_buf_t *)hdl->sa_spill, NULL);
+	mutex_exit(&hdl->sa_lock);
+
+	kmem_cache_free(sa_cache, hdl);
+}
+
+int
+sa_handle_get_from_db(objset_t *os, dmu_buf_t *db, void *userp,
+    sa_handle_type_t hdl_type, sa_handle_t **handlepp)
+{
+	int error = 0;
+	dmu_object_info_t doi;
+	sa_handle_t *handle;
+
+#ifdef ZFS_DEBUG
+	dmu_object_info_from_db(db, &doi);
+	ASSERT(doi.doi_bonus_type == DMU_OT_SA ||
+	    doi.doi_bonus_type == DMU_OT_ZNODE);
+#endif
+	/* find handle, if it exists */
+	/* if one doesn't exist then create a new one, and initialize it */
+
+	handle = (hdl_type == SA_HDL_SHARED) ? dmu_buf_get_user(db) : NULL;
+	if (handle == NULL) {
+		sa_handle_t *newhandle;
+		handle = kmem_cache_alloc(sa_cache, KM_SLEEP);
+		handle->sa_userp = userp;
+		handle->sa_bonus = db;
+		handle->sa_os = os;
+		handle->sa_spill = NULL;
+
+		error = sa_build_index(handle, SA_BONUS);
+		newhandle = (hdl_type == SA_HDL_SHARED) ?
+		    dmu_buf_set_user_ie(db, handle,
+		    NULL, sa_evict) : NULL;
+
+		if (newhandle != NULL) {
+			kmem_cache_free(sa_cache, handle);
+			handle = newhandle;
+		}
+	}
+	*handlepp = handle;
+
+	return (error);
+}
+
+int
+sa_handle_get(objset_t *objset, uint64_t objid, void *userp,
+    sa_handle_type_t hdl_type, sa_handle_t **handlepp)
+{
+	dmu_buf_t *db;
+	int error;
+
+	if (error = dmu_bonus_hold(objset, objid, NULL, &db))
+		return (error);
+
+	return (sa_handle_get_from_db(objset, db, userp, hdl_type,
+	    handlepp));
+}
+
+int
+sa_buf_hold(objset_t *objset, uint64_t obj_num, void *tag, dmu_buf_t **db)
+{
+	return (dmu_bonus_hold(objset, obj_num, tag, db));
+}
+
+void
+sa_buf_rele(dmu_buf_t *db, void *tag)
+{
+	dmu_buf_rele(db, tag);
+}
+
+int
+sa_lookup_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count)
+{
+	ASSERT(hdl);
+	ASSERT(MUTEX_HELD(&hdl->sa_lock));
+	return (sa_attr_op(hdl, bulk, count, SA_LOOKUP, NULL));
+}
+
+int
+sa_lookup(sa_handle_t *hdl, sa_attr_type_t attr, void *buf, uint32_t buflen)
+{
+	int error;
+	sa_bulk_attr_t bulk;
+
+	bulk.sa_attr = attr;
+	bulk.sa_data = buf;
+	bulk.sa_length = buflen;
+	bulk.sa_data_func = NULL;
+
+	ASSERT(hdl);
+	mutex_enter(&hdl->sa_lock);
+	error = sa_lookup_impl(hdl, &bulk, 1);
+	mutex_exit(&hdl->sa_lock);
+	return (error);
+}
+
+#ifdef _KERNEL
+int
+sa_lookup_uio(sa_handle_t *hdl, sa_attr_type_t attr, uio_t *uio)
+{
+	int error;
+	sa_bulk_attr_t bulk;
+
+	bulk.sa_data = NULL;
+	bulk.sa_attr = attr;
+	bulk.sa_data_func = NULL;
+
+	ASSERT(hdl);
+
+	mutex_enter(&hdl->sa_lock);
+	if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) == 0) {
+		error = uiomove((void *)bulk.sa_addr, MIN(bulk.sa_size,
+		    uio->uio_resid), UIO_READ, uio);
+	}
+	mutex_exit(&hdl->sa_lock);
+	return (error);
+
+}
+#endif
+
+void *
+sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype, void *data)
+{
+	sa_idx_tab_t *idx_tab;
+	sa_hdr_phys_t *hdr = (sa_hdr_phys_t *)data;
+	sa_os_t *sa = os->os_sa;
+	sa_lot_t *tb, search;
+	avl_index_t loc;
+
+	/*
+	 * Deterimine layout number.  If SA node and header == 0 then
+	 * force the index table to the dummy "1" empty layout.
+	 *
+	 * The layout number would only be zero for a newly created file
+	 * that has not added any attributes yet, or with crypto enabled which
+	 * doesn't write any attributes to the bonus buffer.
+	 */
+
+	search.lot_num = SA_LAYOUT_NUM(hdr, bonustype);
+
+	tb = avl_find(&sa->sa_layout_num_tree, &search, &loc);
+
+	/* Verify header size is consistent with layout information */
+	ASSERT(tb);
+	ASSERT(IS_SA_BONUSTYPE(bonustype) &&
+	    SA_HDR_SIZE_MATCH_LAYOUT(hdr, tb) || !IS_SA_BONUSTYPE(bonustype) ||
+	    (IS_SA_BONUSTYPE(bonustype) && hdr->sa_layout_info == 0));
+
+	/*
+	 * See if any of the already existing TOC entries can be reused?
+	 */
+
+	for (idx_tab = list_head(&tb->lot_idx_tab); idx_tab;
+	    idx_tab = list_next(&tb->lot_idx_tab, idx_tab)) {
+		boolean_t valid_idx = B_TRUE;
+		int i;
+
+		if (tb->lot_var_sizes != 0 &&
+		    idx_tab->sa_variable_lengths != NULL) {
+			for (i = 0; i != tb->lot_var_sizes; i++) {
+				if (hdr->sa_lengths[i] !=
+				    idx_tab->sa_variable_lengths[i]) {
+					valid_idx = B_FALSE;
+					break;
+				}
+			}
+		}
+		if (valid_idx) {
+			sa_idx_tab_hold(os, idx_tab);
+			return (idx_tab);
+		}
+	}
+
+	/* No such luck, create a new entry */
+	idx_tab = kmem_zalloc(sizeof (sa_idx_tab_t), KM_SLEEP);
+	idx_tab->sa_idx_tab =
+	    kmem_zalloc(sizeof (uint32_t) * sa->sa_num_attrs, KM_SLEEP);
+	idx_tab->sa_layout = tb;
+	refcount_create(&idx_tab->sa_refcount);
+	if (tb->lot_var_sizes)
+		idx_tab->sa_variable_lengths = kmem_alloc(sizeof (uint16_t) *
+		    tb->lot_var_sizes, KM_SLEEP);
+
+	sa_attr_iter(os, hdr, bonustype, sa_build_idx_tab,
+	    tb, idx_tab);
+	sa_idx_tab_hold(os, idx_tab);   /* one hold for consumer */
+	sa_idx_tab_hold(os, idx_tab);	/* one for layout */
+	list_insert_tail(&tb->lot_idx_tab, idx_tab);
+	return (idx_tab);
+}
+
+void
+sa_default_locator(void **dataptr, uint32_t *len, uint32_t total_len,
+    boolean_t start, void *userdata)
+{
+	ASSERT(start);
+
+	*dataptr = userdata;
+	*len = total_len;
+}
+
+static void
+sa_attr_register_sync(sa_handle_t *hdl, dmu_tx_t *tx)
+{
+	uint64_t attr_value = 0;
+	sa_os_t *sa = hdl->sa_os->os_sa;
+	sa_attr_table_t *tb = sa->sa_attr_table;
+	int i;
+
+	mutex_enter(&sa->sa_lock);
+
+	if (!sa->sa_need_attr_registration || sa->sa_master_obj == NULL) {
+		mutex_exit(&sa->sa_lock);
+		return;
+	}
+
+	if (sa->sa_reg_attr_obj == NULL) {
+		sa->sa_reg_attr_obj = zap_create(hdl->sa_os,
+		    DMU_OT_SA_ATTR_REGISTRATION, DMU_OT_NONE, 0, tx);
+		VERIFY(zap_add(hdl->sa_os, sa->sa_master_obj,
+		    SA_REGISTRY, 8, 1, &sa->sa_reg_attr_obj, tx) == 0);
+	}
+	for (i = 0; i != sa->sa_num_attrs; i++) {
+		if (sa->sa_attr_table[i].sa_registered)
+			continue;
+		ATTR_ENCODE(attr_value, tb[i].sa_attr, tb[i].sa_length,
+		    tb[i].sa_byteswap);
+		VERIFY(0 == zap_update(hdl->sa_os, sa->sa_reg_attr_obj,
+		    tb[i].sa_name, 8, 1, &attr_value, tx));
+		tb[i].sa_registered = B_TRUE;
+	}
+	sa->sa_need_attr_registration = B_FALSE;
+	mutex_exit(&sa->sa_lock);
+}
+
+/*
+ * Replace all attributes with attributes specified in template.
+ * If dnode had a spill buffer then those attributes will be
+ * also be replaced, possibly with just an empty spill block
+ *
+ * This interface is intended to only be used for bulk adding of
+ * attributes for a new file.  It will also be used by the ZPL
+ * when converting and old formatted znode to native SA support.
+ */
+int
+sa_replace_all_by_template_locked(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc,
+    int attr_count, dmu_tx_t *tx)
+{
+	sa_os_t *sa = hdl->sa_os->os_sa;
+
+	if (sa->sa_need_attr_registration)
+		sa_attr_register_sync(hdl, tx);
+	return (sa_build_layouts(hdl, attr_desc, attr_count, tx));
+}
+
+int
+sa_replace_all_by_template(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc,
+    int attr_count, dmu_tx_t *tx)
+{
+	int error;
+
+	mutex_enter(&hdl->sa_lock);
+	error = sa_replace_all_by_template_locked(hdl, attr_desc,
+	    attr_count, tx);
+	mutex_exit(&hdl->sa_lock);
+	return (error);
+}
+
+/*
+ * add/remove/replace a single attribute and then rewrite the entire set
+ * of attributes.
+ */
+static int
+sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
+    sa_data_op_t action, sa_data_locator_t *locator, void *datastart,
+    uint16_t buflen, dmu_tx_t *tx)
+{
+	sa_os_t *sa = hdl->sa_os->os_sa;
+	dmu_buf_impl_t *db = (dmu_buf_impl_t *)hdl->sa_bonus;
+	dnode_t *dn;
+	sa_bulk_attr_t *attr_desc;
+	void *old_data[2];
+	int bonus_attr_count = 0;
+	int bonus_data_size, spill_data_size;
+	int spill_attr_count = 0;
+	int error;
+	uint16_t length;
+	int i, j, k, length_idx;
+	sa_hdr_phys_t *hdr;
+	sa_idx_tab_t *idx_tab;
+	int attr_count;
+	int count;
+
+	ASSERT(MUTEX_HELD(&hdl->sa_lock));
+
+	/* First make of copy of the old data */
+
+	DB_DNODE_ENTER(db);
+	dn = DB_DNODE(db);
+	if (dn->dn_bonuslen != 0) {
+		bonus_data_size = hdl->sa_bonus->db_size;
+		old_data[0] = kmem_alloc(bonus_data_size, KM_SLEEP);
+		bcopy(hdl->sa_bonus->db_data, old_data[0],
+		    hdl->sa_bonus->db_size);
+		bonus_attr_count = hdl->sa_bonus_tab->sa_layout->lot_attr_count;
+	} else {
+		old_data[0] = NULL;
+	}
+	DB_DNODE_EXIT(db);
+
+	/* Bring spill buffer online if it isn't currently */
+
+	if ((error = sa_get_spill(hdl)) == 0) {
+		spill_data_size = hdl->sa_spill->db_size;
+		old_data[1] = kmem_alloc(spill_data_size, KM_SLEEP);
+		bcopy(hdl->sa_spill->db_data, old_data[1],
+		    hdl->sa_spill->db_size);
+		spill_attr_count =
+		    hdl->sa_spill_tab->sa_layout->lot_attr_count;
+	} else if (error && error != ENOENT) {
+		if (old_data[0])
+			kmem_free(old_data[0], bonus_data_size);
+		return (error);
+	} else {
+		old_data[1] = NULL;
+	}
+
+	/* build descriptor of all attributes */
+
+	attr_count = bonus_attr_count + spill_attr_count;
+	if (action == SA_ADD)
+		attr_count++;
+	else if (action == SA_REMOVE)
+		attr_count--;
+
+	attr_desc = kmem_zalloc(sizeof (sa_bulk_attr_t) * attr_count, KM_SLEEP);
+
+	/*
+	 * loop through bonus and spill buffer if it exists, and
+	 * build up new attr_descriptor to reset the attributes
+	 */
+	k = j = 0;
+	count = bonus_attr_count;
+	hdr = SA_GET_HDR(hdl, SA_BONUS);
+	idx_tab = SA_IDX_TAB_GET(hdl, SA_BONUS);
+	for (; k != 2; k++) {
+		/* iterate over each attribute in layout */
+		for (i = 0, length_idx = 0; i != count; i++) {
+			sa_attr_type_t attr;
+
+			attr = idx_tab->sa_layout->lot_attrs[i];
+			if (attr == newattr) {
+				if (action == SA_REMOVE) {
+					j++;
+					continue;
+				}
+				ASSERT(SA_REGISTERED_LEN(sa, attr) == 0);
+				ASSERT(action == SA_REPLACE);
+				SA_ADD_BULK_ATTR(attr_desc, j, attr,
+				    locator, datastart, buflen);
+			} else {
+				length = SA_REGISTERED_LEN(sa, attr);
+				if (length == 0) {
+					length = hdr->sa_lengths[length_idx++];
+				}
+
+				SA_ADD_BULK_ATTR(attr_desc, j, attr,
+				    NULL, (void *)
+				    (TOC_OFF(idx_tab->sa_idx_tab[attr]) +
+				    (uintptr_t)old_data[k]), length);
+			}
+		}
+		if (k == 0 && hdl->sa_spill) {
+			hdr = SA_GET_HDR(hdl, SA_SPILL);
+			idx_tab = SA_IDX_TAB_GET(hdl, SA_SPILL);
+			count = spill_attr_count;
+		} else {
+			break;
+		}
+	}
+	if (action == SA_ADD) {
+		length = SA_REGISTERED_LEN(sa, newattr);
+		if (length == 0) {
+			length = buflen;
+		}
+		SA_ADD_BULK_ATTR(attr_desc, j, newattr, locator,
+		    datastart, buflen);
+	}
+
+	error = sa_build_layouts(hdl, attr_desc, attr_count, tx);
+
+	if (old_data[0])
+		kmem_free(old_data[0], bonus_data_size);
+	if (old_data[1])
+		kmem_free(old_data[1], spill_data_size);
+	kmem_free(attr_desc, sizeof (sa_bulk_attr_t) * attr_count);
+
+	return (error);
+}
+
+static int
+sa_bulk_update_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
+    dmu_tx_t *tx)
+{
+	int error;
+	sa_os_t *sa = hdl->sa_os->os_sa;
+	dmu_object_type_t bonustype;
+
+	bonustype = SA_BONUSTYPE_FROM_DB(SA_GET_DB(hdl, SA_BONUS));
+
+	ASSERT(hdl);
+	ASSERT(MUTEX_HELD(&hdl->sa_lock));
+
+	/* sync out registration table if necessary */
+	if (sa->sa_need_attr_registration)
+		sa_attr_register_sync(hdl, tx);
+
+	error = sa_attr_op(hdl, bulk, count, SA_UPDATE, tx);
+	if (error == 0 && !IS_SA_BONUSTYPE(bonustype) && sa->sa_update_cb)
+		sa->sa_update_cb(hdl, tx);
+
+	return (error);
+}
+
+/*
+ * update or add new attribute
+ */
+int
+sa_update(sa_handle_t *hdl, sa_attr_type_t type,
+    void *buf, uint32_t buflen, dmu_tx_t *tx)
+{
+	int error;
+	sa_bulk_attr_t bulk;
+
+	bulk.sa_attr = type;
+	bulk.sa_data_func = NULL;
+	bulk.sa_length = buflen;
+	bulk.sa_data = buf;
+
+	mutex_enter(&hdl->sa_lock);
+	error = sa_bulk_update_impl(hdl, &bulk, 1, tx);
+	mutex_exit(&hdl->sa_lock);
+	return (error);
+}
+
+int
+sa_update_from_cb(sa_handle_t *hdl, sa_attr_type_t attr,
+    uint32_t buflen, sa_data_locator_t *locator, void *userdata, dmu_tx_t *tx)
+{
+	int error;
+	sa_bulk_attr_t bulk;
+
+	bulk.sa_attr = attr;
+	bulk.sa_data = userdata;
+	bulk.sa_data_func = locator;
+	bulk.sa_length = buflen;
+
+	mutex_enter(&hdl->sa_lock);
+	error = sa_bulk_update_impl(hdl, &bulk, 1, tx);
+	mutex_exit(&hdl->sa_lock);
+	return (error);
+}
+
+/*
+ * Return size of an attribute
+ */
+
+int
+sa_size(sa_handle_t *hdl, sa_attr_type_t attr, int *size)
+{
+	sa_bulk_attr_t bulk;
+	int error;
+
+	bulk.sa_data = NULL;
+	bulk.sa_attr = attr;
+	bulk.sa_data_func = NULL;
+
+	ASSERT(hdl);
+	mutex_enter(&hdl->sa_lock);
+	if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) != 0) {
+		mutex_exit(&hdl->sa_lock);
+		return (error);
+	}
+	*size = bulk.sa_size;
+
+	mutex_exit(&hdl->sa_lock);
+	return (0);
+}
+
+int
+sa_bulk_lookup_locked(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count)
+{
+	ASSERT(hdl);
+	ASSERT(MUTEX_HELD(&hdl->sa_lock));
+	return (sa_lookup_impl(hdl, attrs, count));
+}
+
+int
+sa_bulk_lookup(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count)
+{
+	int error;
+
+	ASSERT(hdl);
+	mutex_enter(&hdl->sa_lock);
+	error = sa_bulk_lookup_locked(hdl, attrs, count);
+	mutex_exit(&hdl->sa_lock);
+	return (error);
+}
+
+int
+sa_bulk_update(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count, dmu_tx_t *tx)
+{
+	int error;
+
+	ASSERT(hdl);
+	mutex_enter(&hdl->sa_lock);
+	error = sa_bulk_update_impl(hdl, attrs, count, tx);
+	mutex_exit(&hdl->sa_lock);
+	return (error);
+}
+
+int
+sa_remove(sa_handle_t *hdl, sa_attr_type_t attr, dmu_tx_t *tx)
+{
+	int error;
+
+	mutex_enter(&hdl->sa_lock);
+	error = sa_modify_attrs(hdl, attr, SA_REMOVE, NULL,
+	    NULL, 0, tx);
+	mutex_exit(&hdl->sa_lock);
+	return (error);
+}
+
+void
+sa_object_info(sa_handle_t *hdl, dmu_object_info_t *doi)
+{
+	dmu_object_info_from_db((dmu_buf_t *)hdl->sa_bonus, doi);
+}
+
+void
+sa_object_size(sa_handle_t *hdl, uint32_t *blksize, u_longlong_t *nblocks)
+{
+	dmu_object_size_from_db((dmu_buf_t *)hdl->sa_bonus,
+	    blksize, nblocks);
+}
+
+void
+sa_update_user(sa_handle_t *newhdl, sa_handle_t *oldhdl)
+{
+	(void) dmu_buf_update_user((dmu_buf_t *)newhdl->sa_bonus,
+	    oldhdl, newhdl, NULL, sa_evict);
+	oldhdl->sa_bonus = NULL;
+}
+
+void
+sa_set_userp(sa_handle_t *hdl, void *ptr)
+{
+	hdl->sa_userp = ptr;
+}
+
+dmu_buf_t *
+sa_get_db(sa_handle_t *hdl)
+{
+	return ((dmu_buf_t *)hdl->sa_bonus);
+}
+
+void *
+sa_get_userdata(sa_handle_t *hdl)
+{
+	return (hdl->sa_userp);
+}
+
+void
+sa_register_update_callback_locked(objset_t *os, sa_update_cb_t *func)
+{
+	ASSERT(MUTEX_HELD(&os->os_sa->sa_lock));
+	os->os_sa->sa_update_cb = func;
+}
+
+void
+sa_register_update_callback(objset_t *os, sa_update_cb_t *func)
+{
+
+	mutex_enter(&os->os_sa->sa_lock);
+	sa_register_update_callback_locked(os, func);
+	mutex_exit(&os->os_sa->sa_lock);
+}
+
+uint64_t
+sa_handle_object(sa_handle_t *hdl)
+{
+	return (hdl->sa_bonus->db_object);
+}
+
+boolean_t
+sa_enabled(objset_t *os)
+{
+	return (os->os_sa == NULL);
+}
+
+int
+sa_set_sa_object(objset_t *os, uint64_t sa_object)
+{
+	sa_os_t *sa = os->os_sa;
+
+	if (sa->sa_master_obj)
+		return (1);
+
+	sa->sa_master_obj = sa_object;
+
+	return (0);
+}
+
+int
+sa_hdrsize(void *arg)
+{
+	sa_hdr_phys_t *hdr = arg;
+
+	return (SA_HDR_SIZE(hdr));
+}
+
+void
+sa_handle_lock(sa_handle_t *hdl)
+{
+	ASSERT(hdl);
+	mutex_enter(&hdl->sa_lock);
+}
+
+void
+sa_handle_unlock(sa_handle_t *hdl)
+{
+	ASSERT(hdl);
+	mutex_exit(&hdl->sa_lock);
+}
diff --git a/uts/common/fs/zfs/sha256.c b/uts/common/fs/zfs/sha256.c
new file mode 100644
index 000000000000..f515be6bb304
--- /dev/null
+++ b/uts/common/fs/zfs/sha256.c
@@ -0,0 +1,50 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+#include <sys/zfs_context.h>
+#include <sys/zio.h>
+#include <sys/sha2.h>
+
+void
+zio_checksum_SHA256(const void *buf, uint64_t size, zio_cksum_t *zcp)
+{
+	SHA2_CTX ctx;
+	zio_cksum_t tmp;
+
+	SHA2Init(SHA256, &ctx);
+	SHA2Update(&ctx, buf, size);
+	SHA2Final(&tmp, &ctx);
+
+	/*
+	 * A prior implementation of this function had a
+	 * private SHA256 implementation always wrote things out in
+	 * Big Endian and there wasn't a byteswap variant of it.
+	 * To preseve on disk compatibility we need to force that
+	 * behaviour.
+	 */
+	zcp->zc_word[0] = BE_64(tmp.zc_word[0]);
+	zcp->zc_word[1] = BE_64(tmp.zc_word[1]);
+	zcp->zc_word[2] = BE_64(tmp.zc_word[2]);
+	zcp->zc_word[3] = BE_64(tmp.zc_word[3]);
+}
diff --git a/uts/common/fs/zfs/spa.c b/uts/common/fs/zfs/spa.c
new file mode 100644
index 000000000000..b6190e4cfafe
--- /dev/null
+++ b/uts/common/fs/zfs/spa.c
@@ -0,0 +1,5882 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * This file contains all the routines used when modifying on-disk SPA state.
+ * This includes opening, importing, destroying, exporting a pool, and syncing a
+ * pool.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/fm/fs/zfs.h>
+#include <sys/spa_impl.h>
+#include <sys/zio.h>
+#include <sys/zio_checksum.h>
+#include <sys/dmu.h>
+#include <sys/dmu_tx.h>
+#include <sys/zap.h>
+#include <sys/zil.h>
+#include <sys/ddt.h>
+#include <sys/vdev_impl.h>
+#include <sys/metaslab.h>
+#include <sys/metaslab_impl.h>
+#include <sys/uberblock_impl.h>
+#include <sys/txg.h>
+#include <sys/avl.h>
+#include <sys/dmu_traverse.h>
+#include <sys/dmu_objset.h>
+#include <sys/unique.h>
+#include <sys/dsl_pool.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_synctask.h>
+#include <sys/fs/zfs.h>
+#include <sys/arc.h>
+#include <sys/callb.h>
+#include <sys/systeminfo.h>
+#include <sys/spa_boot.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/dsl_scan.h>
+
+#ifdef	_KERNEL
+#include <sys/bootprops.h>
+#include <sys/callb.h>
+#include <sys/cpupart.h>
+#include <sys/pool.h>
+#include <sys/sysdc.h>
+#include <sys/zone.h>
+#endif	/* _KERNEL */
+
+#include "zfs_prop.h"
+#include "zfs_comutil.h"
+
+typedef enum zti_modes {
+	zti_mode_fixed,			/* value is # of threads (min 1) */
+	zti_mode_online_percent,	/* value is % of online CPUs */
+	zti_mode_batch,			/* cpu-intensive; value is ignored */
+	zti_mode_null,			/* don't create a taskq */
+	zti_nmodes
+} zti_modes_t;
+
+#define	ZTI_FIX(n)	{ zti_mode_fixed, (n) }
+#define	ZTI_PCT(n)	{ zti_mode_online_percent, (n) }
+#define	ZTI_BATCH	{ zti_mode_batch, 0 }
+#define	ZTI_NULL	{ zti_mode_null, 0 }
+
+#define	ZTI_ONE		ZTI_FIX(1)
+
+typedef struct zio_taskq_info {
+	enum zti_modes zti_mode;
+	uint_t zti_value;
+} zio_taskq_info_t;
+
+static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = {
+	"issue", "issue_high", "intr", "intr_high"
+};
+
+/*
+ * Define the taskq threads for the following I/O types:
+ * 	NULL, READ, WRITE, FREE, CLAIM, and IOCTL
+ */
+const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = {
+	/* ISSUE	ISSUE_HIGH	INTR		INTR_HIGH */
+	{ ZTI_ONE,	ZTI_NULL,	ZTI_ONE,	ZTI_NULL },
+	{ ZTI_FIX(8),	ZTI_NULL,	ZTI_BATCH,	ZTI_NULL },
+	{ ZTI_BATCH,	ZTI_FIX(5),	ZTI_FIX(8),	ZTI_FIX(5) },
+	{ ZTI_FIX(100),	ZTI_NULL,	ZTI_ONE,	ZTI_NULL },
+	{ ZTI_ONE,	ZTI_NULL,	ZTI_ONE,	ZTI_NULL },
+	{ ZTI_ONE,	ZTI_NULL,	ZTI_ONE,	ZTI_NULL },
+};
+
+static dsl_syncfunc_t spa_sync_props;
+static boolean_t spa_has_active_shared_spare(spa_t *spa);
+static int spa_load_impl(spa_t *spa, uint64_t, nvlist_t *config,
+    spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig,
+    char **ereport);
+static void spa_vdev_resilver_done(spa_t *spa);
+
+uint_t		zio_taskq_batch_pct = 100;	/* 1 thread per cpu in pset */
+id_t		zio_taskq_psrset_bind = PS_NONE;
+boolean_t	zio_taskq_sysdc = B_TRUE;	/* use SDC scheduling class */
+uint_t		zio_taskq_basedc = 80;		/* base duty cycle */
+
+boolean_t	spa_create_process = B_TRUE;	/* no process ==> no sysdc */
+
+/*
+ * This (illegal) pool name is used when temporarily importing a spa_t in order
+ * to get the vdev stats associated with the imported devices.
+ */
+#define	TRYIMPORT_NAME	"$import"
+
+/*
+ * ==========================================================================
+ * SPA properties routines
+ * ==========================================================================
+ */
+
+/*
+ * Add a (source=src, propname=propval) list to an nvlist.
+ */
+static void
+spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval,
+    uint64_t intval, zprop_source_t src)
+{
+	const char *propname = zpool_prop_to_name(prop);
+	nvlist_t *propval;
+
+	VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0);
+
+	if (strval != NULL)
+		VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0);
+	else
+		VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0);
+
+	VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0);
+	nvlist_free(propval);
+}
+
+/*
+ * Get property values from the spa configuration.
+ */
+static void
+spa_prop_get_config(spa_t *spa, nvlist_t **nvp)
+{
+	uint64_t size;
+	uint64_t alloc;
+	uint64_t cap, version;
+	zprop_source_t src = ZPROP_SRC_NONE;
+	spa_config_dirent_t *dp;
+
+	ASSERT(MUTEX_HELD(&spa->spa_props_lock));
+
+	if (spa->spa_root_vdev != NULL) {
+		alloc = metaslab_class_get_alloc(spa_normal_class(spa));
+		size = metaslab_class_get_space(spa_normal_class(spa));
+		spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src);
+		spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src);
+		spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src);
+		spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL,
+		    size - alloc, src);
+		spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL,
+		    (spa_mode(spa) == FREAD), src);
+
+		cap = (size == 0) ? 0 : (alloc * 100 / size);
+		spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src);
+
+		spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL,
+		    ddt_get_pool_dedup_ratio(spa), src);
+
+		spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL,
+		    spa->spa_root_vdev->vdev_state, src);
+
+		version = spa_version(spa);
+		if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION))
+			src = ZPROP_SRC_DEFAULT;
+		else
+			src = ZPROP_SRC_LOCAL;
+		spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src);
+	}
+
+	spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src);
+
+	if (spa->spa_root != NULL)
+		spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root,
+		    0, ZPROP_SRC_LOCAL);
+
+	if ((dp = list_head(&spa->spa_config_list)) != NULL) {
+		if (dp->scd_path == NULL) {
+			spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE,
+			    "none", 0, ZPROP_SRC_LOCAL);
+		} else if (strcmp(dp->scd_path, spa_config_path) != 0) {
+			spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE,
+			    dp->scd_path, 0, ZPROP_SRC_LOCAL);
+		}
+	}
+}
+
+/*
+ * Get zpool property values.
+ */
+int
+spa_prop_get(spa_t *spa, nvlist_t **nvp)
+{
+	objset_t *mos = spa->spa_meta_objset;
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	int err;
+
+	VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	mutex_enter(&spa->spa_props_lock);
+
+	/*
+	 * Get properties from the spa config.
+	 */
+	spa_prop_get_config(spa, nvp);
+
+	/* If no pool property object, no more prop to get. */
+	if (mos == NULL || spa->spa_pool_props_object == 0) {
+		mutex_exit(&spa->spa_props_lock);
+		return (0);
+	}
+
+	/*
+	 * Get properties from the MOS pool property object.
+	 */
+	for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object);
+	    (err = zap_cursor_retrieve(&zc, &za)) == 0;
+	    zap_cursor_advance(&zc)) {
+		uint64_t intval = 0;
+		char *strval = NULL;
+		zprop_source_t src = ZPROP_SRC_DEFAULT;
+		zpool_prop_t prop;
+
+		if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL)
+			continue;
+
+		switch (za.za_integer_length) {
+		case 8:
+			/* integer property */
+			if (za.za_first_integer !=
+			    zpool_prop_default_numeric(prop))
+				src = ZPROP_SRC_LOCAL;
+
+			if (prop == ZPOOL_PROP_BOOTFS) {
+				dsl_pool_t *dp;
+				dsl_dataset_t *ds = NULL;
+
+				dp = spa_get_dsl(spa);
+				rw_enter(&dp->dp_config_rwlock, RW_READER);
+				if (err = dsl_dataset_hold_obj(dp,
+				    za.za_first_integer, FTAG, &ds)) {
+					rw_exit(&dp->dp_config_rwlock);
+					break;
+				}
+
+				strval = kmem_alloc(
+				    MAXNAMELEN + strlen(MOS_DIR_NAME) + 1,
+				    KM_SLEEP);
+				dsl_dataset_name(ds, strval);
+				dsl_dataset_rele(ds, FTAG);
+				rw_exit(&dp->dp_config_rwlock);
+			} else {
+				strval = NULL;
+				intval = za.za_first_integer;
+			}
+
+			spa_prop_add_list(*nvp, prop, strval, intval, src);
+
+			if (strval != NULL)
+				kmem_free(strval,
+				    MAXNAMELEN + strlen(MOS_DIR_NAME) + 1);
+
+			break;
+
+		case 1:
+			/* string property */
+			strval = kmem_alloc(za.za_num_integers, KM_SLEEP);
+			err = zap_lookup(mos, spa->spa_pool_props_object,
+			    za.za_name, 1, za.za_num_integers, strval);
+			if (err) {
+				kmem_free(strval, za.za_num_integers);
+				break;
+			}
+			spa_prop_add_list(*nvp, prop, strval, 0, src);
+			kmem_free(strval, za.za_num_integers);
+			break;
+
+		default:
+			break;
+		}
+	}
+	zap_cursor_fini(&zc);
+	mutex_exit(&spa->spa_props_lock);
+out:
+	if (err && err != ENOENT) {
+		nvlist_free(*nvp);
+		*nvp = NULL;
+		return (err);
+	}
+
+	return (0);
+}
+
+/*
+ * Validate the given pool properties nvlist and modify the list
+ * for the property values to be set.
+ */
+static int
+spa_prop_validate(spa_t *spa, nvlist_t *props)
+{
+	nvpair_t *elem;
+	int error = 0, reset_bootfs = 0;
+	uint64_t objnum;
+
+	elem = NULL;
+	while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
+		zpool_prop_t prop;
+		char *propname, *strval;
+		uint64_t intval;
+		objset_t *os;
+		char *slash;
+
+		propname = nvpair_name(elem);
+
+		if ((prop = zpool_name_to_prop(propname)) == ZPROP_INVAL)
+			return (EINVAL);
+
+		switch (prop) {
+		case ZPOOL_PROP_VERSION:
+			error = nvpair_value_uint64(elem, &intval);
+			if (!error &&
+			    (intval < spa_version(spa) || intval > SPA_VERSION))
+				error = EINVAL;
+			break;
+
+		case ZPOOL_PROP_DELEGATION:
+		case ZPOOL_PROP_AUTOREPLACE:
+		case ZPOOL_PROP_LISTSNAPS:
+		case ZPOOL_PROP_AUTOEXPAND:
+			error = nvpair_value_uint64(elem, &intval);
+			if (!error && intval > 1)
+				error = EINVAL;
+			break;
+
+		case ZPOOL_PROP_BOOTFS:
+			/*
+			 * If the pool version is less than SPA_VERSION_BOOTFS,
+			 * or the pool is still being created (version == 0),
+			 * the bootfs property cannot be set.
+			 */
+			if (spa_version(spa) < SPA_VERSION_BOOTFS) {
+				error = ENOTSUP;
+				break;
+			}
+
+			/*
+			 * Make sure the vdev config is bootable
+			 */
+			if (!vdev_is_bootable(spa->spa_root_vdev)) {
+				error = ENOTSUP;
+				break;
+			}
+
+			reset_bootfs = 1;
+
+			error = nvpair_value_string(elem, &strval);
+
+			if (!error) {
+				uint64_t compress;
+
+				if (strval == NULL || strval[0] == '\0') {
+					objnum = zpool_prop_default_numeric(
+					    ZPOOL_PROP_BOOTFS);
+					break;
+				}
+
+				if (error = dmu_objset_hold(strval, FTAG, &os))
+					break;
+
+				/* Must be ZPL and not gzip compressed. */
+
+				if (dmu_objset_type(os) != DMU_OST_ZFS) {
+					error = ENOTSUP;
+				} else if ((error = dsl_prop_get_integer(strval,
+				    zfs_prop_to_name(ZFS_PROP_COMPRESSION),
+				    &compress, NULL)) == 0 &&
+				    !BOOTFS_COMPRESS_VALID(compress)) {
+					error = ENOTSUP;
+				} else {
+					objnum = dmu_objset_id(os);
+				}
+				dmu_objset_rele(os, FTAG);
+			}
+			break;
+
+		case ZPOOL_PROP_FAILUREMODE:
+			error = nvpair_value_uint64(elem, &intval);
+			if (!error && (intval < ZIO_FAILURE_MODE_WAIT ||
+			    intval > ZIO_FAILURE_MODE_PANIC))
+				error = EINVAL;
+
+			/*
+			 * This is a special case which only occurs when
+			 * the pool has completely failed. This allows
+			 * the user to change the in-core failmode property
+			 * without syncing it out to disk (I/Os might
+			 * currently be blocked). We do this by returning
+			 * EIO to the caller (spa_prop_set) to trick it
+			 * into thinking we encountered a property validation
+			 * error.
+			 */
+			if (!error && spa_suspended(spa)) {
+				spa->spa_failmode = intval;
+				error = EIO;
+			}
+			break;
+
+		case ZPOOL_PROP_CACHEFILE:
+			if ((error = nvpair_value_string(elem, &strval)) != 0)
+				break;
+
+			if (strval[0] == '\0')
+				break;
+
+			if (strcmp(strval, "none") == 0)
+				break;
+
+			if (strval[0] != '/') {
+				error = EINVAL;
+				break;
+			}
+
+			slash = strrchr(strval, '/');
+			ASSERT(slash != NULL);
+
+			if (slash[1] == '\0' || strcmp(slash, "/.") == 0 ||
+			    strcmp(slash, "/..") == 0)
+				error = EINVAL;
+			break;
+
+		case ZPOOL_PROP_DEDUPDITTO:
+			if (spa_version(spa) < SPA_VERSION_DEDUP)
+				error = ENOTSUP;
+			else
+				error = nvpair_value_uint64(elem, &intval);
+			if (error == 0 &&
+			    intval != 0 && intval < ZIO_DEDUPDITTO_MIN)
+				error = EINVAL;
+			break;
+		}
+
+		if (error)
+			break;
+	}
+
+	if (!error && reset_bootfs) {
+		error = nvlist_remove(props,
+		    zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING);
+
+		if (!error) {
+			error = nvlist_add_uint64(props,
+			    zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum);
+		}
+	}
+
+	return (error);
+}
+
+void
+spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync)
+{
+	char *cachefile;
+	spa_config_dirent_t *dp;
+
+	if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE),
+	    &cachefile) != 0)
+		return;
+
+	dp = kmem_alloc(sizeof (spa_config_dirent_t),
+	    KM_SLEEP);
+
+	if (cachefile[0] == '\0')
+		dp->scd_path = spa_strdup(spa_config_path);
+	else if (strcmp(cachefile, "none") == 0)
+		dp->scd_path = NULL;
+	else
+		dp->scd_path = spa_strdup(cachefile);
+
+	list_insert_head(&spa->spa_config_list, dp);
+	if (need_sync)
+		spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
+}
+
+int
+spa_prop_set(spa_t *spa, nvlist_t *nvp)
+{
+	int error;
+	nvpair_t *elem;
+	boolean_t need_sync = B_FALSE;
+	zpool_prop_t prop;
+
+	if ((error = spa_prop_validate(spa, nvp)) != 0)
+		return (error);
+
+	elem = NULL;
+	while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) {
+		if ((prop = zpool_name_to_prop(
+		    nvpair_name(elem))) == ZPROP_INVAL)
+			return (EINVAL);
+
+		if (prop == ZPOOL_PROP_CACHEFILE ||
+		    prop == ZPOOL_PROP_ALTROOT ||
+		    prop == ZPOOL_PROP_READONLY)
+			continue;
+
+		need_sync = B_TRUE;
+		break;
+	}
+
+	if (need_sync)
+		return (dsl_sync_task_do(spa_get_dsl(spa), NULL, spa_sync_props,
+		    spa, nvp, 3));
+	else
+		return (0);
+}
+
+/*
+ * If the bootfs property value is dsobj, clear it.
+ */
+void
+spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx)
+{
+	if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) {
+		VERIFY(zap_remove(spa->spa_meta_objset,
+		    spa->spa_pool_props_object,
+		    zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0);
+		spa->spa_bootfs = 0;
+	}
+}
+
+/*
+ * ==========================================================================
+ * SPA state manipulation (open/create/destroy/import/export)
+ * ==========================================================================
+ */
+
+static int
+spa_error_entry_compare(const void *a, const void *b)
+{
+	spa_error_entry_t *sa = (spa_error_entry_t *)a;
+	spa_error_entry_t *sb = (spa_error_entry_t *)b;
+	int ret;
+
+	ret = bcmp(&sa->se_bookmark, &sb->se_bookmark,
+	    sizeof (zbookmark_t));
+
+	if (ret < 0)
+		return (-1);
+	else if (ret > 0)
+		return (1);
+	else
+		return (0);
+}
+
+/*
+ * Utility function which retrieves copies of the current logs and
+ * re-initializes them in the process.
+ */
+void
+spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub)
+{
+	ASSERT(MUTEX_HELD(&spa->spa_errlist_lock));
+
+	bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t));
+	bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t));
+
+	avl_create(&spa->spa_errlist_scrub,
+	    spa_error_entry_compare, sizeof (spa_error_entry_t),
+	    offsetof(spa_error_entry_t, se_avl));
+	avl_create(&spa->spa_errlist_last,
+	    spa_error_entry_compare, sizeof (spa_error_entry_t),
+	    offsetof(spa_error_entry_t, se_avl));
+}
+
+static taskq_t *
+spa_taskq_create(spa_t *spa, const char *name, enum zti_modes mode,
+    uint_t value)
+{
+	uint_t flags = TASKQ_PREPOPULATE;
+	boolean_t batch = B_FALSE;
+
+	switch (mode) {
+	case zti_mode_null:
+		return (NULL);		/* no taskq needed */
+
+	case zti_mode_fixed:
+		ASSERT3U(value, >=, 1);
+		value = MAX(value, 1);
+		break;
+
+	case zti_mode_batch:
+		batch = B_TRUE;
+		flags |= TASKQ_THREADS_CPU_PCT;
+		value = zio_taskq_batch_pct;
+		break;
+
+	case zti_mode_online_percent:
+		flags |= TASKQ_THREADS_CPU_PCT;
+		break;
+
+	default:
+		panic("unrecognized mode for %s taskq (%u:%u) in "
+		    "spa_activate()",
+		    name, mode, value);
+		break;
+	}
+
+	if (zio_taskq_sysdc && spa->spa_proc != &p0) {
+		if (batch)
+			flags |= TASKQ_DC_BATCH;
+
+		return (taskq_create_sysdc(name, value, 50, INT_MAX,
+		    spa->spa_proc, zio_taskq_basedc, flags));
+	}
+	return (taskq_create_proc(name, value, maxclsyspri, 50, INT_MAX,
+	    spa->spa_proc, flags));
+}
+
+static void
+spa_create_zio_taskqs(spa_t *spa)
+{
+	for (int t = 0; t < ZIO_TYPES; t++) {
+		for (int q = 0; q < ZIO_TASKQ_TYPES; q++) {
+			const zio_taskq_info_t *ztip = &zio_taskqs[t][q];
+			enum zti_modes mode = ztip->zti_mode;
+			uint_t value = ztip->zti_value;
+			char name[32];
+
+			(void) snprintf(name, sizeof (name),
+			    "%s_%s", zio_type_name[t], zio_taskq_types[q]);
+
+			spa->spa_zio_taskq[t][q] =
+			    spa_taskq_create(spa, name, mode, value);
+		}
+	}
+}
+
+#ifdef _KERNEL
+static void
+spa_thread(void *arg)
+{
+	callb_cpr_t cprinfo;
+
+	spa_t *spa = arg;
+	user_t *pu = PTOU(curproc);
+
+	CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr,
+	    spa->spa_name);
+
+	ASSERT(curproc != &p0);
+	(void) snprintf(pu->u_psargs, sizeof (pu->u_psargs),
+	    "zpool-%s", spa->spa_name);
+	(void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm));
+
+	/* bind this thread to the requested psrset */
+	if (zio_taskq_psrset_bind != PS_NONE) {
+		pool_lock();
+		mutex_enter(&cpu_lock);
+		mutex_enter(&pidlock);
+		mutex_enter(&curproc->p_lock);
+
+		if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind,
+		    0, NULL, NULL) == 0)  {
+			curthread->t_bind_pset = zio_taskq_psrset_bind;
+		} else {
+			cmn_err(CE_WARN,
+			    "Couldn't bind process for zfs pool \"%s\" to "
+			    "pset %d\n", spa->spa_name, zio_taskq_psrset_bind);
+		}
+
+		mutex_exit(&curproc->p_lock);
+		mutex_exit(&pidlock);
+		mutex_exit(&cpu_lock);
+		pool_unlock();
+	}
+
+	if (zio_taskq_sysdc) {
+		sysdc_thread_enter(curthread, 100, 0);
+	}
+
+	spa->spa_proc = curproc;
+	spa->spa_did = curthread->t_did;
+
+	spa_create_zio_taskqs(spa);
+
+	mutex_enter(&spa->spa_proc_lock);
+	ASSERT(spa->spa_proc_state == SPA_PROC_CREATED);
+
+	spa->spa_proc_state = SPA_PROC_ACTIVE;
+	cv_broadcast(&spa->spa_proc_cv);
+
+	CALLB_CPR_SAFE_BEGIN(&cprinfo);
+	while (spa->spa_proc_state == SPA_PROC_ACTIVE)
+		cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock);
+	CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock);
+
+	ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE);
+	spa->spa_proc_state = SPA_PROC_GONE;
+	spa->spa_proc = &p0;
+	cv_broadcast(&spa->spa_proc_cv);
+	CALLB_CPR_EXIT(&cprinfo);	/* drops spa_proc_lock */
+
+	mutex_enter(&curproc->p_lock);
+	lwp_exit();
+}
+#endif
+
+/*
+ * Activate an uninitialized pool.
+ */
+static void
+spa_activate(spa_t *spa, int mode)
+{
+	ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED);
+
+	spa->spa_state = POOL_STATE_ACTIVE;
+	spa->spa_mode = mode;
+
+	spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops);
+	spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops);
+
+	/* Try to create a covering process */
+	mutex_enter(&spa->spa_proc_lock);
+	ASSERT(spa->spa_proc_state == SPA_PROC_NONE);
+	ASSERT(spa->spa_proc == &p0);
+	spa->spa_did = 0;
+
+	/* Only create a process if we're going to be around a while. */
+	if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) {
+		if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri,
+		    NULL, 0) == 0) {
+			spa->spa_proc_state = SPA_PROC_CREATED;
+			while (spa->spa_proc_state == SPA_PROC_CREATED) {
+				cv_wait(&spa->spa_proc_cv,
+				    &spa->spa_proc_lock);
+			}
+			ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE);
+			ASSERT(spa->spa_proc != &p0);
+			ASSERT(spa->spa_did != 0);
+		} else {
+#ifdef _KERNEL
+			cmn_err(CE_WARN,
+			    "Couldn't create process for zfs pool \"%s\"\n",
+			    spa->spa_name);
+#endif
+		}
+	}
+	mutex_exit(&spa->spa_proc_lock);
+
+	/* If we didn't create a process, we need to create our taskqs. */
+	if (spa->spa_proc == &p0) {
+		spa_create_zio_taskqs(spa);
+	}
+
+	list_create(&spa->spa_config_dirty_list, sizeof (vdev_t),
+	    offsetof(vdev_t, vdev_config_dirty_node));
+	list_create(&spa->spa_state_dirty_list, sizeof (vdev_t),
+	    offsetof(vdev_t, vdev_state_dirty_node));
+
+	txg_list_create(&spa->spa_vdev_txg_list,
+	    offsetof(struct vdev, vdev_txg_node));
+
+	avl_create(&spa->spa_errlist_scrub,
+	    spa_error_entry_compare, sizeof (spa_error_entry_t),
+	    offsetof(spa_error_entry_t, se_avl));
+	avl_create(&spa->spa_errlist_last,
+	    spa_error_entry_compare, sizeof (spa_error_entry_t),
+	    offsetof(spa_error_entry_t, se_avl));
+}
+
+/*
+ * Opposite of spa_activate().
+ */
+static void
+spa_deactivate(spa_t *spa)
+{
+	ASSERT(spa->spa_sync_on == B_FALSE);
+	ASSERT(spa->spa_dsl_pool == NULL);
+	ASSERT(spa->spa_root_vdev == NULL);
+	ASSERT(spa->spa_async_zio_root == NULL);
+	ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED);
+
+	txg_list_destroy(&spa->spa_vdev_txg_list);
+
+	list_destroy(&spa->spa_config_dirty_list);
+	list_destroy(&spa->spa_state_dirty_list);
+
+	for (int t = 0; t < ZIO_TYPES; t++) {
+		for (int q = 0; q < ZIO_TASKQ_TYPES; q++) {
+			if (spa->spa_zio_taskq[t][q] != NULL)
+				taskq_destroy(spa->spa_zio_taskq[t][q]);
+			spa->spa_zio_taskq[t][q] = NULL;
+		}
+	}
+
+	metaslab_class_destroy(spa->spa_normal_class);
+	spa->spa_normal_class = NULL;
+
+	metaslab_class_destroy(spa->spa_log_class);
+	spa->spa_log_class = NULL;
+
+	/*
+	 * If this was part of an import or the open otherwise failed, we may
+	 * still have errors left in the queues.  Empty them just in case.
+	 */
+	spa_errlog_drain(spa);
+
+	avl_destroy(&spa->spa_errlist_scrub);
+	avl_destroy(&spa->spa_errlist_last);
+
+	spa->spa_state = POOL_STATE_UNINITIALIZED;
+
+	mutex_enter(&spa->spa_proc_lock);
+	if (spa->spa_proc_state != SPA_PROC_NONE) {
+		ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE);
+		spa->spa_proc_state = SPA_PROC_DEACTIVATE;
+		cv_broadcast(&spa->spa_proc_cv);
+		while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) {
+			ASSERT(spa->spa_proc != &p0);
+			cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock);
+		}
+		ASSERT(spa->spa_proc_state == SPA_PROC_GONE);
+		spa->spa_proc_state = SPA_PROC_NONE;
+	}
+	ASSERT(spa->spa_proc == &p0);
+	mutex_exit(&spa->spa_proc_lock);
+
+	/*
+	 * We want to make sure spa_thread() has actually exited the ZFS
+	 * module, so that the module can't be unloaded out from underneath
+	 * it.
+	 */
+	if (spa->spa_did != 0) {
+		thread_join(spa->spa_did);
+		spa->spa_did = 0;
+	}
+}
+
+/*
+ * Verify a pool configuration, and construct the vdev tree appropriately.  This
+ * will create all the necessary vdevs in the appropriate layout, with each vdev
+ * in the CLOSED state.  This will prep the pool before open/creation/import.
+ * All vdev validation is done by the vdev_alloc() routine.
+ */
+static int
+spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent,
+    uint_t id, int atype)
+{
+	nvlist_t **child;
+	uint_t children;
+	int error;
+
+	if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0)
+		return (error);
+
+	if ((*vdp)->vdev_ops->vdev_op_leaf)
+		return (0);
+
+	error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+	    &child, &children);
+
+	if (error == ENOENT)
+		return (0);
+
+	if (error) {
+		vdev_free(*vdp);
+		*vdp = NULL;
+		return (EINVAL);
+	}
+
+	for (int c = 0; c < children; c++) {
+		vdev_t *vd;
+		if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c,
+		    atype)) != 0) {
+			vdev_free(*vdp);
+			*vdp = NULL;
+			return (error);
+		}
+	}
+
+	ASSERT(*vdp != NULL);
+
+	return (0);
+}
+
+/*
+ * Opposite of spa_load().
+ */
+static void
+spa_unload(spa_t *spa)
+{
+	int i;
+
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+
+	/*
+	 * Stop async tasks.
+	 */
+	spa_async_suspend(spa);
+
+	/*
+	 * Stop syncing.
+	 */
+	if (spa->spa_sync_on) {
+		txg_sync_stop(spa->spa_dsl_pool);
+		spa->spa_sync_on = B_FALSE;
+	}
+
+	/*
+	 * Wait for any outstanding async I/O to complete.
+	 */
+	if (spa->spa_async_zio_root != NULL) {
+		(void) zio_wait(spa->spa_async_zio_root);
+		spa->spa_async_zio_root = NULL;
+	}
+
+	bpobj_close(&spa->spa_deferred_bpobj);
+
+	/*
+	 * Close the dsl pool.
+	 */
+	if (spa->spa_dsl_pool) {
+		dsl_pool_close(spa->spa_dsl_pool);
+		spa->spa_dsl_pool = NULL;
+		spa->spa_meta_objset = NULL;
+	}
+
+	ddt_unload(spa);
+
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+
+	/*
+	 * Drop and purge level 2 cache
+	 */
+	spa_l2cache_drop(spa);
+
+	/*
+	 * Close all vdevs.
+	 */
+	if (spa->spa_root_vdev)
+		vdev_free(spa->spa_root_vdev);
+	ASSERT(spa->spa_root_vdev == NULL);
+
+	for (i = 0; i < spa->spa_spares.sav_count; i++)
+		vdev_free(spa->spa_spares.sav_vdevs[i]);
+	if (spa->spa_spares.sav_vdevs) {
+		kmem_free(spa->spa_spares.sav_vdevs,
+		    spa->spa_spares.sav_count * sizeof (void *));
+		spa->spa_spares.sav_vdevs = NULL;
+	}
+	if (spa->spa_spares.sav_config) {
+		nvlist_free(spa->spa_spares.sav_config);
+		spa->spa_spares.sav_config = NULL;
+	}
+	spa->spa_spares.sav_count = 0;
+
+	for (i = 0; i < spa->spa_l2cache.sav_count; i++)
+		vdev_free(spa->spa_l2cache.sav_vdevs[i]);
+	if (spa->spa_l2cache.sav_vdevs) {
+		kmem_free(spa->spa_l2cache.sav_vdevs,
+		    spa->spa_l2cache.sav_count * sizeof (void *));
+		spa->spa_l2cache.sav_vdevs = NULL;
+	}
+	if (spa->spa_l2cache.sav_config) {
+		nvlist_free(spa->spa_l2cache.sav_config);
+		spa->spa_l2cache.sav_config = NULL;
+	}
+	spa->spa_l2cache.sav_count = 0;
+
+	spa->spa_async_suspended = 0;
+
+	spa_config_exit(spa, SCL_ALL, FTAG);
+}
+
+/*
+ * Load (or re-load) the current list of vdevs describing the active spares for
+ * this pool.  When this is called, we have some form of basic information in
+ * 'spa_spares.sav_config'.  We parse this into vdevs, try to open them, and
+ * then re-generate a more complete list including status information.
+ */
+static void
+spa_load_spares(spa_t *spa)
+{
+	nvlist_t **spares;
+	uint_t nspares;
+	int i;
+	vdev_t *vd, *tvd;
+
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+
+	/*
+	 * First, close and free any existing spare vdevs.
+	 */
+	for (i = 0; i < spa->spa_spares.sav_count; i++) {
+		vd = spa->spa_spares.sav_vdevs[i];
+
+		/* Undo the call to spa_activate() below */
+		if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
+		    B_FALSE)) != NULL && tvd->vdev_isspare)
+			spa_spare_remove(tvd);
+		vdev_close(vd);
+		vdev_free(vd);
+	}
+
+	if (spa->spa_spares.sav_vdevs)
+		kmem_free(spa->spa_spares.sav_vdevs,
+		    spa->spa_spares.sav_count * sizeof (void *));
+
+	if (spa->spa_spares.sav_config == NULL)
+		nspares = 0;
+	else
+		VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
+		    ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
+
+	spa->spa_spares.sav_count = (int)nspares;
+	spa->spa_spares.sav_vdevs = NULL;
+
+	if (nspares == 0)
+		return;
+
+	/*
+	 * Construct the array of vdevs, opening them to get status in the
+	 * process.   For each spare, there is potentially two different vdev_t
+	 * structures associated with it: one in the list of spares (used only
+	 * for basic validation purposes) and one in the active vdev
+	 * configuration (if it's spared in).  During this phase we open and
+	 * validate each vdev on the spare list.  If the vdev also exists in the
+	 * active configuration, then we also mark this vdev as an active spare.
+	 */
+	spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *),
+	    KM_SLEEP);
+	for (i = 0; i < spa->spa_spares.sav_count; i++) {
+		VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0,
+		    VDEV_ALLOC_SPARE) == 0);
+		ASSERT(vd != NULL);
+
+		spa->spa_spares.sav_vdevs[i] = vd;
+
+		if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
+		    B_FALSE)) != NULL) {
+			if (!tvd->vdev_isspare)
+				spa_spare_add(tvd);
+
+			/*
+			 * We only mark the spare active if we were successfully
+			 * able to load the vdev.  Otherwise, importing a pool
+			 * with a bad active spare would result in strange
+			 * behavior, because multiple pool would think the spare
+			 * is actively in use.
+			 *
+			 * There is a vulnerability here to an equally bizarre
+			 * circumstance, where a dead active spare is later
+			 * brought back to life (onlined or otherwise).  Given
+			 * the rarity of this scenario, and the extra complexity
+			 * it adds, we ignore the possibility.
+			 */
+			if (!vdev_is_dead(tvd))
+				spa_spare_activate(tvd);
+		}
+
+		vd->vdev_top = vd;
+		vd->vdev_aux = &spa->spa_spares;
+
+		if (vdev_open(vd) != 0)
+			continue;
+
+		if (vdev_validate_aux(vd) == 0)
+			spa_spare_add(vd);
+	}
+
+	/*
+	 * Recompute the stashed list of spares, with status information
+	 * this time.
+	 */
+	VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES,
+	    DATA_TYPE_NVLIST_ARRAY) == 0);
+
+	spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *),
+	    KM_SLEEP);
+	for (i = 0; i < spa->spa_spares.sav_count; i++)
+		spares[i] = vdev_config_generate(spa,
+		    spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE);
+	VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
+	    ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0);
+	for (i = 0; i < spa->spa_spares.sav_count; i++)
+		nvlist_free(spares[i]);
+	kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *));
+}
+
+/*
+ * Load (or re-load) the current list of vdevs describing the active l2cache for
+ * this pool.  When this is called, we have some form of basic information in
+ * 'spa_l2cache.sav_config'.  We parse this into vdevs, try to open them, and
+ * then re-generate a more complete list including status information.
+ * Devices which are already active have their details maintained, and are
+ * not re-opened.
+ */
+static void
+spa_load_l2cache(spa_t *spa)
+{
+	nvlist_t **l2cache;
+	uint_t nl2cache;
+	int i, j, oldnvdevs;
+	uint64_t guid;
+	vdev_t *vd, **oldvdevs, **newvdevs;
+	spa_aux_vdev_t *sav = &spa->spa_l2cache;
+
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+
+	if (sav->sav_config != NULL) {
+		VERIFY(nvlist_lookup_nvlist_array(sav->sav_config,
+		    ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
+		newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP);
+	} else {
+		nl2cache = 0;
+	}
+
+	oldvdevs = sav->sav_vdevs;
+	oldnvdevs = sav->sav_count;
+	sav->sav_vdevs = NULL;
+	sav->sav_count = 0;
+
+	/*
+	 * Process new nvlist of vdevs.
+	 */
+	for (i = 0; i < nl2cache; i++) {
+		VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID,
+		    &guid) == 0);
+
+		newvdevs[i] = NULL;
+		for (j = 0; j < oldnvdevs; j++) {
+			vd = oldvdevs[j];
+			if (vd != NULL && guid == vd->vdev_guid) {
+				/*
+				 * Retain previous vdev for add/remove ops.
+				 */
+				newvdevs[i] = vd;
+				oldvdevs[j] = NULL;
+				break;
+			}
+		}
+
+		if (newvdevs[i] == NULL) {
+			/*
+			 * Create new vdev
+			 */
+			VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0,
+			    VDEV_ALLOC_L2CACHE) == 0);
+			ASSERT(vd != NULL);
+			newvdevs[i] = vd;
+
+			/*
+			 * Commit this vdev as an l2cache device,
+			 * even if it fails to open.
+			 */
+			spa_l2cache_add(vd);
+
+			vd->vdev_top = vd;
+			vd->vdev_aux = sav;
+
+			spa_l2cache_activate(vd);
+
+			if (vdev_open(vd) != 0)
+				continue;
+
+			(void) vdev_validate_aux(vd);
+
+			if (!vdev_is_dead(vd))
+				l2arc_add_vdev(spa, vd);
+		}
+	}
+
+	/*
+	 * Purge vdevs that were dropped
+	 */
+	for (i = 0; i < oldnvdevs; i++) {
+		uint64_t pool;
+
+		vd = oldvdevs[i];
+		if (vd != NULL) {
+			if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
+			    pool != 0ULL && l2arc_vdev_present(vd))
+				l2arc_remove_vdev(vd);
+			(void) vdev_close(vd);
+			spa_l2cache_remove(vd);
+		}
+	}
+
+	if (oldvdevs)
+		kmem_free(oldvdevs, oldnvdevs * sizeof (void *));
+
+	if (sav->sav_config == NULL)
+		goto out;
+
+	sav->sav_vdevs = newvdevs;
+	sav->sav_count = (int)nl2cache;
+
+	/*
+	 * Recompute the stashed list of l2cache devices, with status
+	 * information this time.
+	 */
+	VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE,
+	    DATA_TYPE_NVLIST_ARRAY) == 0);
+
+	l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP);
+	for (i = 0; i < sav->sav_count; i++)
+		l2cache[i] = vdev_config_generate(spa,
+		    sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE);
+	VERIFY(nvlist_add_nvlist_array(sav->sav_config,
+	    ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0);
+out:
+	for (i = 0; i < sav->sav_count; i++)
+		nvlist_free(l2cache[i]);
+	if (sav->sav_count)
+		kmem_free(l2cache, sav->sav_count * sizeof (void *));
+}
+
+static int
+load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value)
+{
+	dmu_buf_t *db;
+	char *packed = NULL;
+	size_t nvsize = 0;
+	int error;
+	*value = NULL;
+
+	VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db));
+	nvsize = *(uint64_t *)db->db_data;
+	dmu_buf_rele(db, FTAG);
+
+	packed = kmem_alloc(nvsize, KM_SLEEP);
+	error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed,
+	    DMU_READ_PREFETCH);
+	if (error == 0)
+		error = nvlist_unpack(packed, nvsize, value, 0);
+	kmem_free(packed, nvsize);
+
+	return (error);
+}
+
+/*
+ * Checks to see if the given vdev could not be opened, in which case we post a
+ * sysevent to notify the autoreplace code that the device has been removed.
+ */
+static void
+spa_check_removed(vdev_t *vd)
+{
+	for (int c = 0; c < vd->vdev_children; c++)
+		spa_check_removed(vd->vdev_child[c]);
+
+	if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd)) {
+		zfs_post_autoreplace(vd->vdev_spa, vd);
+		spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK);
+	}
+}
+
+/*
+ * Validate the current config against the MOS config
+ */
+static boolean_t
+spa_config_valid(spa_t *spa, nvlist_t *config)
+{
+	vdev_t *mrvd, *rvd = spa->spa_root_vdev;
+	nvlist_t *nv;
+
+	VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0);
+
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+	VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0);
+
+	ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children);
+
+	/*
+	 * If we're doing a normal import, then build up any additional
+	 * diagnostic information about missing devices in this config.
+	 * We'll pass this up to the user for further processing.
+	 */
+	if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) {
+		nvlist_t **child, *nv;
+		uint64_t idx = 0;
+
+		child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **),
+		    KM_SLEEP);
+		VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+		for (int c = 0; c < rvd->vdev_children; c++) {
+			vdev_t *tvd = rvd->vdev_child[c];
+			vdev_t *mtvd  = mrvd->vdev_child[c];
+
+			if (tvd->vdev_ops == &vdev_missing_ops &&
+			    mtvd->vdev_ops != &vdev_missing_ops &&
+			    mtvd->vdev_islog)
+				child[idx++] = vdev_config_generate(spa, mtvd,
+				    B_FALSE, 0);
+		}
+
+		if (idx) {
+			VERIFY(nvlist_add_nvlist_array(nv,
+			    ZPOOL_CONFIG_CHILDREN, child, idx) == 0);
+			VERIFY(nvlist_add_nvlist(spa->spa_load_info,
+			    ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0);
+
+			for (int i = 0; i < idx; i++)
+				nvlist_free(child[i]);
+		}
+		nvlist_free(nv);
+		kmem_free(child, rvd->vdev_children * sizeof (char **));
+	}
+
+	/*
+	 * Compare the root vdev tree with the information we have
+	 * from the MOS config (mrvd). Check each top-level vdev
+	 * with the corresponding MOS config top-level (mtvd).
+	 */
+	for (int c = 0; c < rvd->vdev_children; c++) {
+		vdev_t *tvd = rvd->vdev_child[c];
+		vdev_t *mtvd  = mrvd->vdev_child[c];
+
+		/*
+		 * Resolve any "missing" vdevs in the current configuration.
+		 * If we find that the MOS config has more accurate information
+		 * about the top-level vdev then use that vdev instead.
+		 */
+		if (tvd->vdev_ops == &vdev_missing_ops &&
+		    mtvd->vdev_ops != &vdev_missing_ops) {
+
+			if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG))
+				continue;
+
+			/*
+			 * Device specific actions.
+			 */
+			if (mtvd->vdev_islog) {
+				spa_set_log_state(spa, SPA_LOG_CLEAR);
+			} else {
+				/*
+				 * XXX - once we have 'readonly' pool
+				 * support we should be able to handle
+				 * missing data devices by transitioning
+				 * the pool to readonly.
+				 */
+				continue;
+			}
+
+			/*
+			 * Swap the missing vdev with the data we were
+			 * able to obtain from the MOS config.
+			 */
+			vdev_remove_child(rvd, tvd);
+			vdev_remove_child(mrvd, mtvd);
+
+			vdev_add_child(rvd, mtvd);
+			vdev_add_child(mrvd, tvd);
+
+			spa_config_exit(spa, SCL_ALL, FTAG);
+			vdev_load(mtvd);
+			spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+
+			vdev_reopen(rvd);
+		} else if (mtvd->vdev_islog) {
+			/*
+			 * Load the slog device's state from the MOS config
+			 * since it's possible that the label does not
+			 * contain the most up-to-date information.
+			 */
+			vdev_load_log_state(tvd, mtvd);
+			vdev_reopen(tvd);
+		}
+	}
+	vdev_free(mrvd);
+	spa_config_exit(spa, SCL_ALL, FTAG);
+
+	/*
+	 * Ensure we were able to validate the config.
+	 */
+	return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum);
+}
+
+/*
+ * Check for missing log devices
+ */
+static int
+spa_check_logs(spa_t *spa)
+{
+	switch (spa->spa_log_state) {
+	case SPA_LOG_MISSING:
+		/* need to recheck in case slog has been restored */
+	case SPA_LOG_UNKNOWN:
+		if (dmu_objset_find(spa->spa_name, zil_check_log_chain, NULL,
+		    DS_FIND_CHILDREN)) {
+			spa_set_log_state(spa, SPA_LOG_MISSING);
+			return (1);
+		}
+		break;
+	}
+	return (0);
+}
+
+static boolean_t
+spa_passivate_log(spa_t *spa)
+{
+	vdev_t *rvd = spa->spa_root_vdev;
+	boolean_t slog_found = B_FALSE;
+
+	ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER));
+
+	if (!spa_has_slogs(spa))
+		return (B_FALSE);
+
+	for (int c = 0; c < rvd->vdev_children; c++) {
+		vdev_t *tvd = rvd->vdev_child[c];
+		metaslab_group_t *mg = tvd->vdev_mg;
+
+		if (tvd->vdev_islog) {
+			metaslab_group_passivate(mg);
+			slog_found = B_TRUE;
+		}
+	}
+
+	return (slog_found);
+}
+
+static void
+spa_activate_log(spa_t *spa)
+{
+	vdev_t *rvd = spa->spa_root_vdev;
+
+	ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER));
+
+	for (int c = 0; c < rvd->vdev_children; c++) {
+		vdev_t *tvd = rvd->vdev_child[c];
+		metaslab_group_t *mg = tvd->vdev_mg;
+
+		if (tvd->vdev_islog)
+			metaslab_group_activate(mg);
+	}
+}
+
+int
+spa_offline_log(spa_t *spa)
+{
+	int error = 0;
+
+	if ((error = dmu_objset_find(spa_name(spa), zil_vdev_offline,
+	    NULL, DS_FIND_CHILDREN)) == 0) {
+
+		/*
+		 * We successfully offlined the log device, sync out the
+		 * current txg so that the "stubby" block can be removed
+		 * by zil_sync().
+		 */
+		txg_wait_synced(spa->spa_dsl_pool, 0);
+	}
+	return (error);
+}
+
+static void
+spa_aux_check_removed(spa_aux_vdev_t *sav)
+{
+	for (int i = 0; i < sav->sav_count; i++)
+		spa_check_removed(sav->sav_vdevs[i]);
+}
+
+void
+spa_claim_notify(zio_t *zio)
+{
+	spa_t *spa = zio->io_spa;
+
+	if (zio->io_error)
+		return;
+
+	mutex_enter(&spa->spa_props_lock);	/* any mutex will do */
+	if (spa->spa_claim_max_txg < zio->io_bp->blk_birth)
+		spa->spa_claim_max_txg = zio->io_bp->blk_birth;
+	mutex_exit(&spa->spa_props_lock);
+}
+
+typedef struct spa_load_error {
+	uint64_t	sle_meta_count;
+	uint64_t	sle_data_count;
+} spa_load_error_t;
+
+static void
+spa_load_verify_done(zio_t *zio)
+{
+	blkptr_t *bp = zio->io_bp;
+	spa_load_error_t *sle = zio->io_private;
+	dmu_object_type_t type = BP_GET_TYPE(bp);
+	int error = zio->io_error;
+
+	if (error) {
+		if ((BP_GET_LEVEL(bp) != 0 || dmu_ot[type].ot_metadata) &&
+		    type != DMU_OT_INTENT_LOG)
+			atomic_add_64(&sle->sle_meta_count, 1);
+		else
+			atomic_add_64(&sle->sle_data_count, 1);
+	}
+	zio_data_buf_free(zio->io_data, zio->io_size);
+}
+
+/*ARGSUSED*/
+static int
+spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
+    arc_buf_t *pbuf, const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
+{
+	if (bp != NULL) {
+		zio_t *rio = arg;
+		size_t size = BP_GET_PSIZE(bp);
+		void *data = zio_data_buf_alloc(size);
+
+		zio_nowait(zio_read(rio, spa, bp, data, size,
+		    spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB,
+		    ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL |
+		    ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb));
+	}
+	return (0);
+}
+
+static int
+spa_load_verify(spa_t *spa)
+{
+	zio_t *rio;
+	spa_load_error_t sle = { 0 };
+	zpool_rewind_policy_t policy;
+	boolean_t verify_ok = B_FALSE;
+	int error;
+
+	zpool_get_rewind_policy(spa->spa_config, &policy);
+
+	if (policy.zrp_request & ZPOOL_NEVER_REWIND)
+		return (0);
+
+	rio = zio_root(spa, NULL, &sle,
+	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
+
+	error = traverse_pool(spa, spa->spa_verify_min_txg,
+	    TRAVERSE_PRE | TRAVERSE_PREFETCH, spa_load_verify_cb, rio);
+
+	(void) zio_wait(rio);
+
+	spa->spa_load_meta_errors = sle.sle_meta_count;
+	spa->spa_load_data_errors = sle.sle_data_count;
+
+	if (!error && sle.sle_meta_count <= policy.zrp_maxmeta &&
+	    sle.sle_data_count <= policy.zrp_maxdata) {
+		int64_t loss = 0;
+
+		verify_ok = B_TRUE;
+		spa->spa_load_txg = spa->spa_uberblock.ub_txg;
+		spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp;
+
+		loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts;
+		VERIFY(nvlist_add_uint64(spa->spa_load_info,
+		    ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0);
+		VERIFY(nvlist_add_int64(spa->spa_load_info,
+		    ZPOOL_CONFIG_REWIND_TIME, loss) == 0);
+		VERIFY(nvlist_add_uint64(spa->spa_load_info,
+		    ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0);
+	} else {
+		spa->spa_load_max_txg = spa->spa_uberblock.ub_txg;
+	}
+
+	if (error) {
+		if (error != ENXIO && error != EIO)
+			error = EIO;
+		return (error);
+	}
+
+	return (verify_ok ? 0 : EIO);
+}
+
+/*
+ * Find a value in the pool props object.
+ */
+static void
+spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val)
+{
+	(void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object,
+	    zpool_prop_to_name(prop), sizeof (uint64_t), 1, val);
+}
+
+/*
+ * Find a value in the pool directory object.
+ */
+static int
+spa_dir_prop(spa_t *spa, const char *name, uint64_t *val)
+{
+	return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+	    name, sizeof (uint64_t), 1, val));
+}
+
+static int
+spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err)
+{
+	vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux);
+	return (err);
+}
+
+/*
+ * Fix up config after a partly-completed split.  This is done with the
+ * ZPOOL_CONFIG_SPLIT nvlist.  Both the splitting pool and the split-off
+ * pool have that entry in their config, but only the splitting one contains
+ * a list of all the guids of the vdevs that are being split off.
+ *
+ * This function determines what to do with that list: either rejoin
+ * all the disks to the pool, or complete the splitting process.  To attempt
+ * the rejoin, each disk that is offlined is marked online again, and
+ * we do a reopen() call.  If the vdev label for every disk that was
+ * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
+ * then we call vdev_split() on each disk, and complete the split.
+ *
+ * Otherwise we leave the config alone, with all the vdevs in place in
+ * the original pool.
+ */
+static void
+spa_try_repair(spa_t *spa, nvlist_t *config)
+{
+	uint_t extracted;
+	uint64_t *glist;
+	uint_t i, gcount;
+	nvlist_t *nvl;
+	vdev_t **vd;
+	boolean_t attempt_reopen;
+
+	if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0)
+		return;
+
+	/* check that the config is complete */
+	if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST,
+	    &glist, &gcount) != 0)
+		return;
+
+	vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP);
+
+	/* attempt to online all the vdevs & validate */
+	attempt_reopen = B_TRUE;
+	for (i = 0; i < gcount; i++) {
+		if (glist[i] == 0)	/* vdev is hole */
+			continue;
+
+		vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE);
+		if (vd[i] == NULL) {
+			/*
+			 * Don't bother attempting to reopen the disks;
+			 * just do the split.
+			 */
+			attempt_reopen = B_FALSE;
+		} else {
+			/* attempt to re-online it */
+			vd[i]->vdev_offline = B_FALSE;
+		}
+	}
+
+	if (attempt_reopen) {
+		vdev_reopen(spa->spa_root_vdev);
+
+		/* check each device to see what state it's in */
+		for (extracted = 0, i = 0; i < gcount; i++) {
+			if (vd[i] != NULL &&
+			    vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL)
+				break;
+			++extracted;
+		}
+	}
+
+	/*
+	 * If every disk has been moved to the new pool, or if we never
+	 * even attempted to look at them, then we split them off for
+	 * good.
+	 */
+	if (!attempt_reopen || gcount == extracted) {
+		for (i = 0; i < gcount; i++)
+			if (vd[i] != NULL)
+				vdev_split(vd[i]);
+		vdev_reopen(spa->spa_root_vdev);
+	}
+
+	kmem_free(vd, gcount * sizeof (vdev_t *));
+}
+
+static int
+spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type,
+    boolean_t mosconfig)
+{
+	nvlist_t *config = spa->spa_config;
+	char *ereport = FM_EREPORT_ZFS_POOL;
+	int error;
+	uint64_t pool_guid;
+	nvlist_t *nvl;
+
+	if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid))
+		return (EINVAL);
+
+	/*
+	 * Versioning wasn't explicitly added to the label until later, so if
+	 * it's not present treat it as the initial version.
+	 */
+	if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
+	    &spa->spa_ubsync.ub_version) != 0)
+		spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
+
+	(void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG,
+	    &spa->spa_config_txg);
+
+	if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) &&
+	    spa_guid_exists(pool_guid, 0)) {
+		error = EEXIST;
+	} else {
+		spa->spa_load_guid = pool_guid;
+
+		if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT,
+		    &nvl) == 0) {
+			VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting,
+			    KM_SLEEP) == 0);
+		}
+
+		gethrestime(&spa->spa_loaded_ts);
+		error = spa_load_impl(spa, pool_guid, config, state, type,
+		    mosconfig, &ereport);
+	}
+
+	spa->spa_minref = refcount_count(&spa->spa_refcount);
+	if (error) {
+		if (error != EEXIST) {
+			spa->spa_loaded_ts.tv_sec = 0;
+			spa->spa_loaded_ts.tv_nsec = 0;
+		}
+		if (error != EBADF) {
+			zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0);
+		}
+	}
+	spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE;
+	spa->spa_ena = 0;
+
+	return (error);
+}
+
+/*
+ * Load an existing storage pool, using the pool's builtin spa_config as a
+ * source of configuration information.
+ */
+static int
+spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config,
+    spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig,
+    char **ereport)
+{
+	int error = 0;
+	nvlist_t *nvroot = NULL;
+	vdev_t *rvd;
+	uberblock_t *ub = &spa->spa_uberblock;
+	uint64_t children, config_cache_txg = spa->spa_config_txg;
+	int orig_mode = spa->spa_mode;
+	int parse;
+	uint64_t obj;
+
+	/*
+	 * If this is an untrusted config, access the pool in read-only mode.
+	 * This prevents things like resilvering recently removed devices.
+	 */
+	if (!mosconfig)
+		spa->spa_mode = FREAD;
+
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+
+	spa->spa_load_state = state;
+
+	if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot))
+		return (EINVAL);
+
+	parse = (type == SPA_IMPORT_EXISTING ?
+	    VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT);
+
+	/*
+	 * Create "The Godfather" zio to hold all async IOs
+	 */
+	spa->spa_async_zio_root = zio_root(spa, NULL, NULL,
+	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER);
+
+	/*
+	 * Parse the configuration into a vdev tree.  We explicitly set the
+	 * value that will be returned by spa_version() since parsing the
+	 * configuration requires knowing the version number.
+	 */
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+	error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse);
+	spa_config_exit(spa, SCL_ALL, FTAG);
+
+	if (error != 0)
+		return (error);
+
+	ASSERT(spa->spa_root_vdev == rvd);
+
+	if (type != SPA_IMPORT_ASSEMBLE) {
+		ASSERT(spa_guid(spa) == pool_guid);
+	}
+
+	/*
+	 * Try to open all vdevs, loading each label in the process.
+	 */
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+	error = vdev_open(rvd);
+	spa_config_exit(spa, SCL_ALL, FTAG);
+	if (error != 0)
+		return (error);
+
+	/*
+	 * We need to validate the vdev labels against the configuration that
+	 * we have in hand, which is dependent on the setting of mosconfig. If
+	 * mosconfig is true then we're validating the vdev labels based on
+	 * that config.  Otherwise, we're validating against the cached config
+	 * (zpool.cache) that was read when we loaded the zfs module, and then
+	 * later we will recursively call spa_load() and validate against
+	 * the vdev config.
+	 *
+	 * If we're assembling a new pool that's been split off from an
+	 * existing pool, the labels haven't yet been updated so we skip
+	 * validation for now.
+	 */
+	if (type != SPA_IMPORT_ASSEMBLE) {
+		spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+		error = vdev_validate(rvd);
+		spa_config_exit(spa, SCL_ALL, FTAG);
+
+		if (error != 0)
+			return (error);
+
+		if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN)
+			return (ENXIO);
+	}
+
+	/*
+	 * Find the best uberblock.
+	 */
+	vdev_uberblock_load(NULL, rvd, ub);
+
+	/*
+	 * If we weren't able to find a single valid uberblock, return failure.
+	 */
+	if (ub->ub_txg == 0)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO));
+
+	/*
+	 * If the pool is newer than the code, we can't open it.
+	 */
+	if (ub->ub_version > SPA_VERSION)
+		return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP));
+
+	/*
+	 * If the vdev guid sum doesn't match the uberblock, we have an
+	 * incomplete configuration.  We first check to see if the pool
+	 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
+	 * If it is, defer the vdev_guid_sum check till later so we
+	 * can handle missing vdevs.
+	 */
+	if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN,
+	    &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE &&
+	    rvd->vdev_guid_sum != ub->ub_guid_sum)
+		return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO));
+
+	if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) {
+		spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+		spa_try_repair(spa, config);
+		spa_config_exit(spa, SCL_ALL, FTAG);
+		nvlist_free(spa->spa_config_splitting);
+		spa->spa_config_splitting = NULL;
+	}
+
+	/*
+	 * Initialize internal SPA structures.
+	 */
+	spa->spa_state = POOL_STATE_ACTIVE;
+	spa->spa_ubsync = spa->spa_uberblock;
+	spa->spa_verify_min_txg = spa->spa_extreme_rewind ?
+	    TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1;
+	spa->spa_first_txg = spa->spa_last_ubsync_txg ?
+	    spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1;
+	spa->spa_claim_max_txg = spa->spa_first_txg;
+	spa->spa_prev_software_version = ub->ub_software_version;
+
+	error = dsl_pool_open(spa, spa->spa_first_txg, &spa->spa_dsl_pool);
+	if (error)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+	spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset;
+
+	if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+	if (!mosconfig) {
+		uint64_t hostid;
+		nvlist_t *policy = NULL, *nvconfig;
+
+		if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0)
+			return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+		if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig,
+		    ZPOOL_CONFIG_HOSTID, &hostid) == 0) {
+			char *hostname;
+			unsigned long myhostid = 0;
+
+			VERIFY(nvlist_lookup_string(nvconfig,
+			    ZPOOL_CONFIG_HOSTNAME, &hostname) == 0);
+
+#ifdef	_KERNEL
+			myhostid = zone_get_hostid(NULL);
+#else	/* _KERNEL */
+			/*
+			 * We're emulating the system's hostid in userland, so
+			 * we can't use zone_get_hostid().
+			 */
+			(void) ddi_strtoul(hw_serial, NULL, 10, &myhostid);
+#endif	/* _KERNEL */
+			if (hostid != 0 && myhostid != 0 &&
+			    hostid != myhostid) {
+				nvlist_free(nvconfig);
+				cmn_err(CE_WARN, "pool '%s' could not be "
+				    "loaded as it was last accessed by "
+				    "another system (host: %s hostid: 0x%lx). "
+				    "See: http://www.sun.com/msg/ZFS-8000-EY",
+				    spa_name(spa), hostname,
+				    (unsigned long)hostid);
+				return (EBADF);
+			}
+		}
+		if (nvlist_lookup_nvlist(spa->spa_config,
+		    ZPOOL_REWIND_POLICY, &policy) == 0)
+			VERIFY(nvlist_add_nvlist(nvconfig,
+			    ZPOOL_REWIND_POLICY, policy) == 0);
+
+		spa_config_set(spa, nvconfig);
+		spa_unload(spa);
+		spa_deactivate(spa);
+		spa_activate(spa, orig_mode);
+
+		return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE));
+	}
+
+	if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+	error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj);
+	if (error != 0)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+	/*
+	 * Load the bit that tells us to use the new accounting function
+	 * (raid-z deflation).  If we have an older pool, this will not
+	 * be present.
+	 */
+	error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate);
+	if (error != 0 && error != ENOENT)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+	error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION,
+	    &spa->spa_creation_version);
+	if (error != 0 && error != ENOENT)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+	/*
+	 * Load the persistent error log.  If we have an older pool, this will
+	 * not be present.
+	 */
+	error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last);
+	if (error != 0 && error != ENOENT)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+	error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB,
+	    &spa->spa_errlog_scrub);
+	if (error != 0 && error != ENOENT)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+	/*
+	 * Load the history object.  If we have an older pool, this
+	 * will not be present.
+	 */
+	error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history);
+	if (error != 0 && error != ENOENT)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+	/*
+	 * If we're assembling the pool from the split-off vdevs of
+	 * an existing pool, we don't want to attach the spares & cache
+	 * devices.
+	 */
+
+	/*
+	 * Load any hot spares for this pool.
+	 */
+	error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object);
+	if (error != 0 && error != ENOENT)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+	if (error == 0 && type != SPA_IMPORT_ASSEMBLE) {
+		ASSERT(spa_version(spa) >= SPA_VERSION_SPARES);
+		if (load_nvlist(spa, spa->spa_spares.sav_object,
+		    &spa->spa_spares.sav_config) != 0)
+			return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+		spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+		spa_load_spares(spa);
+		spa_config_exit(spa, SCL_ALL, FTAG);
+	} else if (error == 0) {
+		spa->spa_spares.sav_sync = B_TRUE;
+	}
+
+	/*
+	 * Load any level 2 ARC devices for this pool.
+	 */
+	error = spa_dir_prop(spa, DMU_POOL_L2CACHE,
+	    &spa->spa_l2cache.sav_object);
+	if (error != 0 && error != ENOENT)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+	if (error == 0 && type != SPA_IMPORT_ASSEMBLE) {
+		ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE);
+		if (load_nvlist(spa, spa->spa_l2cache.sav_object,
+		    &spa->spa_l2cache.sav_config) != 0)
+			return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+		spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+		spa_load_l2cache(spa);
+		spa_config_exit(spa, SCL_ALL, FTAG);
+	} else if (error == 0) {
+		spa->spa_l2cache.sav_sync = B_TRUE;
+	}
+
+	spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
+
+	error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object);
+	if (error && error != ENOENT)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+	if (error == 0) {
+		uint64_t autoreplace;
+
+		spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs);
+		spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace);
+		spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation);
+		spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode);
+		spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand);
+		spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO,
+		    &spa->spa_dedup_ditto);
+
+		spa->spa_autoreplace = (autoreplace != 0);
+	}
+
+	/*
+	 * If the 'autoreplace' property is set, then post a resource notifying
+	 * the ZFS DE that it should not issue any faults for unopenable
+	 * devices.  We also iterate over the vdevs, and post a sysevent for any
+	 * unopenable vdevs so that the normal autoreplace handler can take
+	 * over.
+	 */
+	if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) {
+		spa_check_removed(spa->spa_root_vdev);
+		/*
+		 * For the import case, this is done in spa_import(), because
+		 * at this point we're using the spare definitions from
+		 * the MOS config, not necessarily from the userland config.
+		 */
+		if (state != SPA_LOAD_IMPORT) {
+			spa_aux_check_removed(&spa->spa_spares);
+			spa_aux_check_removed(&spa->spa_l2cache);
+		}
+	}
+
+	/*
+	 * Load the vdev state for all toplevel vdevs.
+	 */
+	vdev_load(rvd);
+
+	/*
+	 * Propagate the leaf DTLs we just loaded all the way up the tree.
+	 */
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+	vdev_dtl_reassess(rvd, 0, 0, B_FALSE);
+	spa_config_exit(spa, SCL_ALL, FTAG);
+
+	/*
+	 * Load the DDTs (dedup tables).
+	 */
+	error = ddt_load(spa);
+	if (error != 0)
+		return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+	spa_update_dspace(spa);
+
+	/*
+	 * Validate the config, using the MOS config to fill in any
+	 * information which might be missing.  If we fail to validate
+	 * the config then declare the pool unfit for use. If we're
+	 * assembling a pool from a split, the log is not transferred
+	 * over.
+	 */
+	if (type != SPA_IMPORT_ASSEMBLE) {
+		nvlist_t *nvconfig;
+
+		if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0)
+			return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
+
+		if (!spa_config_valid(spa, nvconfig)) {
+			nvlist_free(nvconfig);
+			return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM,
+			    ENXIO));
+		}
+		nvlist_free(nvconfig);
+
+		/*
+		 * Now that we've validate the config, check the state of the
+		 * root vdev.  If it can't be opened, it indicates one or
+		 * more toplevel vdevs are faulted.
+		 */
+		if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN)
+			return (ENXIO);
+
+		if (spa_check_logs(spa)) {
+			*ereport = FM_EREPORT_ZFS_LOG_REPLAY;
+			return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO));
+		}
+	}
+
+	/*
+	 * We've successfully opened the pool, verify that we're ready
+	 * to start pushing transactions.
+	 */
+	if (state != SPA_LOAD_TRYIMPORT) {
+		if (error = spa_load_verify(spa))
+			return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA,
+			    error));
+	}
+
+	if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER ||
+	    spa->spa_load_max_txg == UINT64_MAX)) {
+		dmu_tx_t *tx;
+		int need_update = B_FALSE;
+
+		ASSERT(state != SPA_LOAD_TRYIMPORT);
+
+		/*
+		 * Claim log blocks that haven't been committed yet.
+		 * This must all happen in a single txg.
+		 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
+		 * invoked from zil_claim_log_block()'s i/o done callback.
+		 * Price of rollback is that we abandon the log.
+		 */
+		spa->spa_claiming = B_TRUE;
+
+		tx = dmu_tx_create_assigned(spa_get_dsl(spa),
+		    spa_first_txg(spa));
+		(void) dmu_objset_find(spa_name(spa),
+		    zil_claim, tx, DS_FIND_CHILDREN);
+		dmu_tx_commit(tx);
+
+		spa->spa_claiming = B_FALSE;
+
+		spa_set_log_state(spa, SPA_LOG_GOOD);
+		spa->spa_sync_on = B_TRUE;
+		txg_sync_start(spa->spa_dsl_pool);
+
+		/*
+		 * Wait for all claims to sync.  We sync up to the highest
+		 * claimed log block birth time so that claimed log blocks
+		 * don't appear to be from the future.  spa_claim_max_txg
+		 * will have been set for us by either zil_check_log_chain()
+		 * (invoked from spa_check_logs()) or zil_claim() above.
+		 */
+		txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg);
+
+		/*
+		 * If the config cache is stale, or we have uninitialized
+		 * metaslabs (see spa_vdev_add()), then update the config.
+		 *
+		 * If this is a verbatim import, trust the current
+		 * in-core spa_config and update the disk labels.
+		 */
+		if (config_cache_txg != spa->spa_config_txg ||
+		    state == SPA_LOAD_IMPORT ||
+		    state == SPA_LOAD_RECOVER ||
+		    (spa->spa_import_flags & ZFS_IMPORT_VERBATIM))
+			need_update = B_TRUE;
+
+		for (int c = 0; c < rvd->vdev_children; c++)
+			if (rvd->vdev_child[c]->vdev_ms_array == 0)
+				need_update = B_TRUE;
+
+		/*
+		 * Update the config cache asychronously in case we're the
+		 * root pool, in which case the config cache isn't writable yet.
+		 */
+		if (need_update)
+			spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
+
+		/*
+		 * Check all DTLs to see if anything needs resilvering.
+		 */
+		if (!dsl_scan_resilvering(spa->spa_dsl_pool) &&
+		    vdev_resilver_needed(rvd, NULL, NULL))
+			spa_async_request(spa, SPA_ASYNC_RESILVER);
+
+		/*
+		 * Delete any inconsistent datasets.
+		 */
+		(void) dmu_objset_find(spa_name(spa),
+		    dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN);
+
+		/*
+		 * Clean up any stale temporary dataset userrefs.
+		 */
+		dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool);
+	}
+
+	return (0);
+}
+
+static int
+spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig)
+{
+	int mode = spa->spa_mode;
+
+	spa_unload(spa);
+	spa_deactivate(spa);
+
+	spa->spa_load_max_txg--;
+
+	spa_activate(spa, mode);
+	spa_async_suspend(spa);
+
+	return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig));
+}
+
+static int
+spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig,
+    uint64_t max_request, int rewind_flags)
+{
+	nvlist_t *config = NULL;
+	int load_error, rewind_error;
+	uint64_t safe_rewind_txg;
+	uint64_t min_txg;
+
+	if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) {
+		spa->spa_load_max_txg = spa->spa_load_txg;
+		spa_set_log_state(spa, SPA_LOG_CLEAR);
+	} else {
+		spa->spa_load_max_txg = max_request;
+	}
+
+	load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING,
+	    mosconfig);
+	if (load_error == 0)
+		return (0);
+
+	if (spa->spa_root_vdev != NULL)
+		config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
+
+	spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg;
+	spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp;
+
+	if (rewind_flags & ZPOOL_NEVER_REWIND) {
+		nvlist_free(config);
+		return (load_error);
+	}
+
+	/* Price of rolling back is discarding txgs, including log */
+	if (state == SPA_LOAD_RECOVER)
+		spa_set_log_state(spa, SPA_LOG_CLEAR);
+
+	spa->spa_load_max_txg = spa->spa_last_ubsync_txg;
+	safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE;
+	min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ?
+	    TXG_INITIAL : safe_rewind_txg;
+
+	/*
+	 * Continue as long as we're finding errors, we're still within
+	 * the acceptable rewind range, and we're still finding uberblocks
+	 */
+	while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg &&
+	    spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) {
+		if (spa->spa_load_max_txg < safe_rewind_txg)
+			spa->spa_extreme_rewind = B_TRUE;
+		rewind_error = spa_load_retry(spa, state, mosconfig);
+	}
+
+	spa->spa_extreme_rewind = B_FALSE;
+	spa->spa_load_max_txg = UINT64_MAX;
+
+	if (config && (rewind_error || state != SPA_LOAD_RECOVER))
+		spa_config_set(spa, config);
+
+	return (state == SPA_LOAD_RECOVER ? rewind_error : load_error);
+}
+
+/*
+ * Pool Open/Import
+ *
+ * The import case is identical to an open except that the configuration is sent
+ * down from userland, instead of grabbed from the configuration cache.  For the
+ * case of an open, the pool configuration will exist in the
+ * POOL_STATE_UNINITIALIZED state.
+ *
+ * The stats information (gen/count/ustats) is used to gather vdev statistics at
+ * the same time open the pool, without having to keep around the spa_t in some
+ * ambiguous state.
+ */
+static int
+spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy,
+    nvlist_t **config)
+{
+	spa_t *spa;
+	spa_load_state_t state = SPA_LOAD_OPEN;
+	int error;
+	int locked = B_FALSE;
+
+	*spapp = NULL;
+
+	/*
+	 * As disgusting as this is, we need to support recursive calls to this
+	 * function because dsl_dir_open() is called during spa_load(), and ends
+	 * up calling spa_open() again.  The real fix is to figure out how to
+	 * avoid dsl_dir_open() calling this in the first place.
+	 */
+	if (mutex_owner(&spa_namespace_lock) != curthread) {
+		mutex_enter(&spa_namespace_lock);
+		locked = B_TRUE;
+	}
+
+	if ((spa = spa_lookup(pool)) == NULL) {
+		if (locked)
+			mutex_exit(&spa_namespace_lock);
+		return (ENOENT);
+	}
+
+	if (spa->spa_state == POOL_STATE_UNINITIALIZED) {
+		zpool_rewind_policy_t policy;
+
+		zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config,
+		    &policy);
+		if (policy.zrp_request & ZPOOL_DO_REWIND)
+			state = SPA_LOAD_RECOVER;
+
+		spa_activate(spa, spa_mode_global);
+
+		if (state != SPA_LOAD_RECOVER)
+			spa->spa_last_ubsync_txg = spa->spa_load_txg = 0;
+
+		error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg,
+		    policy.zrp_request);
+
+		if (error == EBADF) {
+			/*
+			 * If vdev_validate() returns failure (indicated by
+			 * EBADF), it indicates that one of the vdevs indicates
+			 * that the pool has been exported or destroyed.  If
+			 * this is the case, the config cache is out of sync and
+			 * we should remove the pool from the namespace.
+			 */
+			spa_unload(spa);
+			spa_deactivate(spa);
+			spa_config_sync(spa, B_TRUE, B_TRUE);
+			spa_remove(spa);
+			if (locked)
+				mutex_exit(&spa_namespace_lock);
+			return (ENOENT);
+		}
+
+		if (error) {
+			/*
+			 * We can't open the pool, but we still have useful
+			 * information: the state of each vdev after the
+			 * attempted vdev_open().  Return this to the user.
+			 */
+			if (config != NULL && spa->spa_config) {
+				VERIFY(nvlist_dup(spa->spa_config, config,
+				    KM_SLEEP) == 0);
+				VERIFY(nvlist_add_nvlist(*config,
+				    ZPOOL_CONFIG_LOAD_INFO,
+				    spa->spa_load_info) == 0);
+			}
+			spa_unload(spa);
+			spa_deactivate(spa);
+			spa->spa_last_open_failed = error;
+			if (locked)
+				mutex_exit(&spa_namespace_lock);
+			*spapp = NULL;
+			return (error);
+		}
+	}
+
+	spa_open_ref(spa, tag);
+
+	if (config != NULL)
+		*config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
+
+	/*
+	 * If we've recovered the pool, pass back any information we
+	 * gathered while doing the load.
+	 */
+	if (state == SPA_LOAD_RECOVER) {
+		VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO,
+		    spa->spa_load_info) == 0);
+	}
+
+	if (locked) {
+		spa->spa_last_open_failed = 0;
+		spa->spa_last_ubsync_txg = 0;
+		spa->spa_load_txg = 0;
+		mutex_exit(&spa_namespace_lock);
+	}
+
+	*spapp = spa;
+
+	return (0);
+}
+
+int
+spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy,
+    nvlist_t **config)
+{
+	return (spa_open_common(name, spapp, tag, policy, config));
+}
+
+int
+spa_open(const char *name, spa_t **spapp, void *tag)
+{
+	return (spa_open_common(name, spapp, tag, NULL, NULL));
+}
+
+/*
+ * Lookup the given spa_t, incrementing the inject count in the process,
+ * preventing it from being exported or destroyed.
+ */
+spa_t *
+spa_inject_addref(char *name)
+{
+	spa_t *spa;
+
+	mutex_enter(&spa_namespace_lock);
+	if ((spa = spa_lookup(name)) == NULL) {
+		mutex_exit(&spa_namespace_lock);
+		return (NULL);
+	}
+	spa->spa_inject_ref++;
+	mutex_exit(&spa_namespace_lock);
+
+	return (spa);
+}
+
+void
+spa_inject_delref(spa_t *spa)
+{
+	mutex_enter(&spa_namespace_lock);
+	spa->spa_inject_ref--;
+	mutex_exit(&spa_namespace_lock);
+}
+
+/*
+ * Add spares device information to the nvlist.
+ */
+static void
+spa_add_spares(spa_t *spa, nvlist_t *config)
+{
+	nvlist_t **spares;
+	uint_t i, nspares;
+	nvlist_t *nvroot;
+	uint64_t guid;
+	vdev_stat_t *vs;
+	uint_t vsc;
+	uint64_t pool;
+
+	ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
+
+	if (spa->spa_spares.sav_count == 0)
+		return;
+
+	VERIFY(nvlist_lookup_nvlist(config,
+	    ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
+	VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
+	    ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
+	if (nspares != 0) {
+		VERIFY(nvlist_add_nvlist_array(nvroot,
+		    ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
+		VERIFY(nvlist_lookup_nvlist_array(nvroot,
+		    ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
+
+		/*
+		 * Go through and find any spares which have since been
+		 * repurposed as an active spare.  If this is the case, update
+		 * their status appropriately.
+		 */
+		for (i = 0; i < nspares; i++) {
+			VERIFY(nvlist_lookup_uint64(spares[i],
+			    ZPOOL_CONFIG_GUID, &guid) == 0);
+			if (spa_spare_exists(guid, &pool, NULL) &&
+			    pool != 0ULL) {
+				VERIFY(nvlist_lookup_uint64_array(
+				    spares[i], ZPOOL_CONFIG_VDEV_STATS,
+				    (uint64_t **)&vs, &vsc) == 0);
+				vs->vs_state = VDEV_STATE_CANT_OPEN;
+				vs->vs_aux = VDEV_AUX_SPARED;
+			}
+		}
+	}
+}
+
+/*
+ * Add l2cache device information to the nvlist, including vdev stats.
+ */
+static void
+spa_add_l2cache(spa_t *spa, nvlist_t *config)
+{
+	nvlist_t **l2cache;
+	uint_t i, j, nl2cache;
+	nvlist_t *nvroot;
+	uint64_t guid;
+	vdev_t *vd;
+	vdev_stat_t *vs;
+	uint_t vsc;
+
+	ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
+
+	if (spa->spa_l2cache.sav_count == 0)
+		return;
+
+	VERIFY(nvlist_lookup_nvlist(config,
+	    ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
+	VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config,
+	    ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
+	if (nl2cache != 0) {
+		VERIFY(nvlist_add_nvlist_array(nvroot,
+		    ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
+		VERIFY(nvlist_lookup_nvlist_array(nvroot,
+		    ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
+
+		/*
+		 * Update level 2 cache device stats.
+		 */
+
+		for (i = 0; i < nl2cache; i++) {
+			VERIFY(nvlist_lookup_uint64(l2cache[i],
+			    ZPOOL_CONFIG_GUID, &guid) == 0);
+
+			vd = NULL;
+			for (j = 0; j < spa->spa_l2cache.sav_count; j++) {
+				if (guid ==
+				    spa->spa_l2cache.sav_vdevs[j]->vdev_guid) {
+					vd = spa->spa_l2cache.sav_vdevs[j];
+					break;
+				}
+			}
+			ASSERT(vd != NULL);
+
+			VERIFY(nvlist_lookup_uint64_array(l2cache[i],
+			    ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc)
+			    == 0);
+			vdev_get_stats(vd, vs);
+		}
+	}
+}
+
+int
+spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen)
+{
+	int error;
+	spa_t *spa;
+
+	*config = NULL;
+	error = spa_open_common(name, &spa, FTAG, NULL, config);
+
+	if (spa != NULL) {
+		/*
+		 * This still leaves a window of inconsistency where the spares
+		 * or l2cache devices could change and the config would be
+		 * self-inconsistent.
+		 */
+		spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
+
+		if (*config != NULL) {
+			uint64_t loadtimes[2];
+
+			loadtimes[0] = spa->spa_loaded_ts.tv_sec;
+			loadtimes[1] = spa->spa_loaded_ts.tv_nsec;
+			VERIFY(nvlist_add_uint64_array(*config,
+			    ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0);
+
+			VERIFY(nvlist_add_uint64(*config,
+			    ZPOOL_CONFIG_ERRCOUNT,
+			    spa_get_errlog_size(spa)) == 0);
+
+			if (spa_suspended(spa))
+				VERIFY(nvlist_add_uint64(*config,
+				    ZPOOL_CONFIG_SUSPENDED,
+				    spa->spa_failmode) == 0);
+
+			spa_add_spares(spa, *config);
+			spa_add_l2cache(spa, *config);
+		}
+	}
+
+	/*
+	 * We want to get the alternate root even for faulted pools, so we cheat
+	 * and call spa_lookup() directly.
+	 */
+	if (altroot) {
+		if (spa == NULL) {
+			mutex_enter(&spa_namespace_lock);
+			spa = spa_lookup(name);
+			if (spa)
+				spa_altroot(spa, altroot, buflen);
+			else
+				altroot[0] = '\0';
+			spa = NULL;
+			mutex_exit(&spa_namespace_lock);
+		} else {
+			spa_altroot(spa, altroot, buflen);
+		}
+	}
+
+	if (spa != NULL) {
+		spa_config_exit(spa, SCL_CONFIG, FTAG);
+		spa_close(spa, FTAG);
+	}
+
+	return (error);
+}
+
+/*
+ * Validate that the auxiliary device array is well formed.  We must have an
+ * array of nvlists, each which describes a valid leaf vdev.  If this is an
+ * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
+ * specified, as long as they are well-formed.
+ */
+static int
+spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode,
+    spa_aux_vdev_t *sav, const char *config, uint64_t version,
+    vdev_labeltype_t label)
+{
+	nvlist_t **dev;
+	uint_t i, ndev;
+	vdev_t *vd;
+	int error;
+
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+
+	/*
+	 * It's acceptable to have no devs specified.
+	 */
+	if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0)
+		return (0);
+
+	if (ndev == 0)
+		return (EINVAL);
+
+	/*
+	 * Make sure the pool is formatted with a version that supports this
+	 * device type.
+	 */
+	if (spa_version(spa) < version)
+		return (ENOTSUP);
+
+	/*
+	 * Set the pending device list so we correctly handle device in-use
+	 * checking.
+	 */
+	sav->sav_pending = dev;
+	sav->sav_npending = ndev;
+
+	for (i = 0; i < ndev; i++) {
+		if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0,
+		    mode)) != 0)
+			goto out;
+
+		if (!vd->vdev_ops->vdev_op_leaf) {
+			vdev_free(vd);
+			error = EINVAL;
+			goto out;
+		}
+
+		/*
+		 * The L2ARC currently only supports disk devices in
+		 * kernel context.  For user-level testing, we allow it.
+		 */
+#ifdef _KERNEL
+		if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) &&
+		    strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) {
+			error = ENOTBLK;
+			goto out;
+		}
+#endif
+		vd->vdev_top = vd;
+
+		if ((error = vdev_open(vd)) == 0 &&
+		    (error = vdev_label_init(vd, crtxg, label)) == 0) {
+			VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID,
+			    vd->vdev_guid) == 0);
+		}
+
+		vdev_free(vd);
+
+		if (error &&
+		    (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE))
+			goto out;
+		else
+			error = 0;
+	}
+
+out:
+	sav->sav_pending = NULL;
+	sav->sav_npending = 0;
+	return (error);
+}
+
+static int
+spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode)
+{
+	int error;
+
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+
+	if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode,
+	    &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES,
+	    VDEV_LABEL_SPARE)) != 0) {
+		return (error);
+	}
+
+	return (spa_validate_aux_devs(spa, nvroot, crtxg, mode,
+	    &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE,
+	    VDEV_LABEL_L2CACHE));
+}
+
+static void
+spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs,
+    const char *config)
+{
+	int i;
+
+	if (sav->sav_config != NULL) {
+		nvlist_t **olddevs;
+		uint_t oldndevs;
+		nvlist_t **newdevs;
+
+		/*
+		 * Generate new dev list by concatentating with the
+		 * current dev list.
+		 */
+		VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config,
+		    &olddevs, &oldndevs) == 0);
+
+		newdevs = kmem_alloc(sizeof (void *) *
+		    (ndevs + oldndevs), KM_SLEEP);
+		for (i = 0; i < oldndevs; i++)
+			VERIFY(nvlist_dup(olddevs[i], &newdevs[i],
+			    KM_SLEEP) == 0);
+		for (i = 0; i < ndevs; i++)
+			VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs],
+			    KM_SLEEP) == 0);
+
+		VERIFY(nvlist_remove(sav->sav_config, config,
+		    DATA_TYPE_NVLIST_ARRAY) == 0);
+
+		VERIFY(nvlist_add_nvlist_array(sav->sav_config,
+		    config, newdevs, ndevs + oldndevs) == 0);
+		for (i = 0; i < oldndevs + ndevs; i++)
+			nvlist_free(newdevs[i]);
+		kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *));
+	} else {
+		/*
+		 * Generate a new dev list.
+		 */
+		VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME,
+		    KM_SLEEP) == 0);
+		VERIFY(nvlist_add_nvlist_array(sav->sav_config, config,
+		    devs, ndevs) == 0);
+	}
+}
+
+/*
+ * Stop and drop level 2 ARC devices
+ */
+void
+spa_l2cache_drop(spa_t *spa)
+{
+	vdev_t *vd;
+	int i;
+	spa_aux_vdev_t *sav = &spa->spa_l2cache;
+
+	for (i = 0; i < sav->sav_count; i++) {
+		uint64_t pool;
+
+		vd = sav->sav_vdevs[i];
+		ASSERT(vd != NULL);
+
+		if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
+		    pool != 0ULL && l2arc_vdev_present(vd))
+			l2arc_remove_vdev(vd);
+		if (vd->vdev_isl2cache)
+			spa_l2cache_remove(vd);
+		vdev_clear_stats(vd);
+		(void) vdev_close(vd);
+	}
+}
+
+/*
+ * Pool Creation
+ */
+int
+spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props,
+    const char *history_str, nvlist_t *zplprops)
+{
+	spa_t *spa;
+	char *altroot = NULL;
+	vdev_t *rvd;
+	dsl_pool_t *dp;
+	dmu_tx_t *tx;
+	int error = 0;
+	uint64_t txg = TXG_INITIAL;
+	nvlist_t **spares, **l2cache;
+	uint_t nspares, nl2cache;
+	uint64_t version, obj;
+
+	/*
+	 * If this pool already exists, return failure.
+	 */
+	mutex_enter(&spa_namespace_lock);
+	if (spa_lookup(pool) != NULL) {
+		mutex_exit(&spa_namespace_lock);
+		return (EEXIST);
+	}
+
+	/*
+	 * Allocate a new spa_t structure.
+	 */
+	(void) nvlist_lookup_string(props,
+	    zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
+	spa = spa_add(pool, NULL, altroot);
+	spa_activate(spa, spa_mode_global);
+
+	if (props && (error = spa_prop_validate(spa, props))) {
+		spa_deactivate(spa);
+		spa_remove(spa);
+		mutex_exit(&spa_namespace_lock);
+		return (error);
+	}
+
+	if (nvlist_lookup_uint64(props, zpool_prop_to_name(ZPOOL_PROP_VERSION),
+	    &version) != 0)
+		version = SPA_VERSION;
+	ASSERT(version <= SPA_VERSION);
+
+	spa->spa_first_txg = txg;
+	spa->spa_uberblock.ub_txg = txg - 1;
+	spa->spa_uberblock.ub_version = version;
+	spa->spa_ubsync = spa->spa_uberblock;
+
+	/*
+	 * Create "The Godfather" zio to hold all async IOs
+	 */
+	spa->spa_async_zio_root = zio_root(spa, NULL, NULL,
+	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER);
+
+	/*
+	 * Create the root vdev.
+	 */
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+
+	error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD);
+
+	ASSERT(error != 0 || rvd != NULL);
+	ASSERT(error != 0 || spa->spa_root_vdev == rvd);
+
+	if (error == 0 && !zfs_allocatable_devs(nvroot))
+		error = EINVAL;
+
+	if (error == 0 &&
+	    (error = vdev_create(rvd, txg, B_FALSE)) == 0 &&
+	    (error = spa_validate_aux(spa, nvroot, txg,
+	    VDEV_ALLOC_ADD)) == 0) {
+		for (int c = 0; c < rvd->vdev_children; c++) {
+			vdev_metaslab_set_size(rvd->vdev_child[c]);
+			vdev_expand(rvd->vdev_child[c], txg);
+		}
+	}
+
+	spa_config_exit(spa, SCL_ALL, FTAG);
+
+	if (error != 0) {
+		spa_unload(spa);
+		spa_deactivate(spa);
+		spa_remove(spa);
+		mutex_exit(&spa_namespace_lock);
+		return (error);
+	}
+
+	/*
+	 * Get the list of spares, if specified.
+	 */
+	if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
+	    &spares, &nspares) == 0) {
+		VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME,
+		    KM_SLEEP) == 0);
+		VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
+		    ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
+		spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+		spa_load_spares(spa);
+		spa_config_exit(spa, SCL_ALL, FTAG);
+		spa->spa_spares.sav_sync = B_TRUE;
+	}
+
+	/*
+	 * Get the list of level 2 cache devices, if specified.
+	 */
+	if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
+	    &l2cache, &nl2cache) == 0) {
+		VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config,
+		    NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config,
+		    ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
+		spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+		spa_load_l2cache(spa);
+		spa_config_exit(spa, SCL_ALL, FTAG);
+		spa->spa_l2cache.sav_sync = B_TRUE;
+	}
+
+	spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg);
+	spa->spa_meta_objset = dp->dp_meta_objset;
+
+	/*
+	 * Create DDTs (dedup tables).
+	 */
+	ddt_create(spa);
+
+	spa_update_dspace(spa);
+
+	tx = dmu_tx_create_assigned(dp, txg);
+
+	/*
+	 * Create the pool config object.
+	 */
+	spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset,
+	    DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE,
+	    DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx);
+
+	if (zap_add(spa->spa_meta_objset,
+	    DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG,
+	    sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) {
+		cmn_err(CE_PANIC, "failed to add pool config");
+	}
+
+	if (zap_add(spa->spa_meta_objset,
+	    DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION,
+	    sizeof (uint64_t), 1, &version, tx) != 0) {
+		cmn_err(CE_PANIC, "failed to add pool version");
+	}
+
+	/* Newly created pools with the right version are always deflated. */
+	if (version >= SPA_VERSION_RAIDZ_DEFLATE) {
+		spa->spa_deflate = TRUE;
+		if (zap_add(spa->spa_meta_objset,
+		    DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
+		    sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) {
+			cmn_err(CE_PANIC, "failed to add deflate");
+		}
+	}
+
+	/*
+	 * Create the deferred-free bpobj.  Turn off compression
+	 * because sync-to-convergence takes longer if the blocksize
+	 * keeps changing.
+	 */
+	obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx);
+	dmu_object_set_compress(spa->spa_meta_objset, obj,
+	    ZIO_COMPRESS_OFF, tx);
+	if (zap_add(spa->spa_meta_objset,
+	    DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ,
+	    sizeof (uint64_t), 1, &obj, tx) != 0) {
+		cmn_err(CE_PANIC, "failed to add bpobj");
+	}
+	VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj,
+	    spa->spa_meta_objset, obj));
+
+	/*
+	 * Create the pool's history object.
+	 */
+	if (version >= SPA_VERSION_ZPOOL_HISTORY)
+		spa_history_create_obj(spa, tx);
+
+	/*
+	 * Set pool properties.
+	 */
+	spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS);
+	spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
+	spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE);
+	spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND);
+
+	if (props != NULL) {
+		spa_configfile_set(spa, props, B_FALSE);
+		spa_sync_props(spa, props, tx);
+	}
+
+	dmu_tx_commit(tx);
+
+	spa->spa_sync_on = B_TRUE;
+	txg_sync_start(spa->spa_dsl_pool);
+
+	/*
+	 * We explicitly wait for the first transaction to complete so that our
+	 * bean counters are appropriately updated.
+	 */
+	txg_wait_synced(spa->spa_dsl_pool, txg);
+
+	spa_config_sync(spa, B_FALSE, B_TRUE);
+
+	if (version >= SPA_VERSION_ZPOOL_HISTORY && history_str != NULL)
+		(void) spa_history_log(spa, history_str, LOG_CMD_POOL_CREATE);
+	spa_history_log_version(spa, LOG_POOL_CREATE);
+
+	spa->spa_minref = refcount_count(&spa->spa_refcount);
+
+	mutex_exit(&spa_namespace_lock);
+
+	return (0);
+}
+
+#ifdef _KERNEL
+/*
+ * Get the root pool information from the root disk, then import the root pool
+ * during the system boot up time.
+ */
+extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **);
+
+static nvlist_t *
+spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid)
+{
+	nvlist_t *config;
+	nvlist_t *nvtop, *nvroot;
+	uint64_t pgid;
+
+	if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0)
+		return (NULL);
+
+	/*
+	 * Add this top-level vdev to the child array.
+	 */
+	VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+	    &nvtop) == 0);
+	VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
+	    &pgid) == 0);
+	VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0);
+
+	/*
+	 * Put this pool's top-level vdevs into a root vdev.
+	 */
+	VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
+	    VDEV_TYPE_ROOT) == 0);
+	VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0);
+	VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0);
+	VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
+	    &nvtop, 1) == 0);
+
+	/*
+	 * Replace the existing vdev_tree with the new root vdev in
+	 * this pool's configuration (remove the old, add the new).
+	 */
+	VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0);
+	nvlist_free(nvroot);
+	return (config);
+}
+
+/*
+ * Walk the vdev tree and see if we can find a device with "better"
+ * configuration. A configuration is "better" if the label on that
+ * device has a more recent txg.
+ */
+static void
+spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg)
+{
+	for (int c = 0; c < vd->vdev_children; c++)
+		spa_alt_rootvdev(vd->vdev_child[c], avd, txg);
+
+	if (vd->vdev_ops->vdev_op_leaf) {
+		nvlist_t *label;
+		uint64_t label_txg;
+
+		if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid,
+		    &label) != 0)
+			return;
+
+		VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG,
+		    &label_txg) == 0);
+
+		/*
+		 * Do we have a better boot device?
+		 */
+		if (label_txg > *txg) {
+			*txg = label_txg;
+			*avd = vd;
+		}
+		nvlist_free(label);
+	}
+}
+
+/*
+ * Import a root pool.
+ *
+ * For x86. devpath_list will consist of devid and/or physpath name of
+ * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
+ * The GRUB "findroot" command will return the vdev we should boot.
+ *
+ * For Sparc, devpath_list consists the physpath name of the booting device
+ * no matter the rootpool is a single device pool or a mirrored pool.
+ * e.g.
+ *	"/pci@1f,0/ide@d/disk@0,0:a"
+ */
+int
+spa_import_rootpool(char *devpath, char *devid)
+{
+	spa_t *spa;
+	vdev_t *rvd, *bvd, *avd = NULL;
+	nvlist_t *config, *nvtop;
+	uint64_t guid, txg;
+	char *pname;
+	int error;
+
+	/*
+	 * Read the label from the boot device and generate a configuration.
+	 */
+	config = spa_generate_rootconf(devpath, devid, &guid);
+#if defined(_OBP) && defined(_KERNEL)
+	if (config == NULL) {
+		if (strstr(devpath, "/iscsi/ssd") != NULL) {
+			/* iscsi boot */
+			get_iscsi_bootpath_phy(devpath);
+			config = spa_generate_rootconf(devpath, devid, &guid);
+		}
+	}
+#endif
+	if (config == NULL) {
+		cmn_err(CE_NOTE, "Can not read the pool label from '%s'",
+		    devpath);
+		return (EIO);
+	}
+
+	VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
+	    &pname) == 0);
+	VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0);
+
+	mutex_enter(&spa_namespace_lock);
+	if ((spa = spa_lookup(pname)) != NULL) {
+		/*
+		 * Remove the existing root pool from the namespace so that we
+		 * can replace it with the correct config we just read in.
+		 */
+		spa_remove(spa);
+	}
+
+	spa = spa_add(pname, config, NULL);
+	spa->spa_is_root = B_TRUE;
+	spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
+
+	/*
+	 * Build up a vdev tree based on the boot device's label config.
+	 */
+	VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+	    &nvtop) == 0);
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+	error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
+	    VDEV_ALLOC_ROOTPOOL);
+	spa_config_exit(spa, SCL_ALL, FTAG);
+	if (error) {
+		mutex_exit(&spa_namespace_lock);
+		nvlist_free(config);
+		cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
+		    pname);
+		return (error);
+	}
+
+	/*
+	 * Get the boot vdev.
+	 */
+	if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) {
+		cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu",
+		    (u_longlong_t)guid);
+		error = ENOENT;
+		goto out;
+	}
+
+	/*
+	 * Determine if there is a better boot device.
+	 */
+	avd = bvd;
+	spa_alt_rootvdev(rvd, &avd, &txg);
+	if (avd != bvd) {
+		cmn_err(CE_NOTE, "The boot device is 'degraded'. Please "
+		    "try booting from '%s'", avd->vdev_path);
+		error = EINVAL;
+		goto out;
+	}
+
+	/*
+	 * If the boot device is part of a spare vdev then ensure that
+	 * we're booting off the active spare.
+	 */
+	if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops &&
+	    !bvd->vdev_isspare) {
+		cmn_err(CE_NOTE, "The boot device is currently spared. Please "
+		    "try booting from '%s'",
+		    bvd->vdev_parent->
+		    vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path);
+		error = EINVAL;
+		goto out;
+	}
+
+	error = 0;
+	spa_history_log_version(spa, LOG_POOL_IMPORT);
+out:
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+	vdev_free(rvd);
+	spa_config_exit(spa, SCL_ALL, FTAG);
+	mutex_exit(&spa_namespace_lock);
+
+	nvlist_free(config);
+	return (error);
+}
+
+#endif
+
+/*
+ * Import a non-root pool into the system.
+ */
+int
+spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags)
+{
+	spa_t *spa;
+	char *altroot = NULL;
+	spa_load_state_t state = SPA_LOAD_IMPORT;
+	zpool_rewind_policy_t policy;
+	uint64_t mode = spa_mode_global;
+	uint64_t readonly = B_FALSE;
+	int error;
+	nvlist_t *nvroot;
+	nvlist_t **spares, **l2cache;
+	uint_t nspares, nl2cache;
+
+	/*
+	 * If a pool with this name exists, return failure.
+	 */
+	mutex_enter(&spa_namespace_lock);
+	if (spa_lookup(pool) != NULL) {
+		mutex_exit(&spa_namespace_lock);
+		return (EEXIST);
+	}
+
+	/*
+	 * Create and initialize the spa structure.
+	 */
+	(void) nvlist_lookup_string(props,
+	    zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
+	(void) nvlist_lookup_uint64(props,
+	    zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly);
+	if (readonly)
+		mode = FREAD;
+	spa = spa_add(pool, config, altroot);
+	spa->spa_import_flags = flags;
+
+	/*
+	 * Verbatim import - Take a pool and insert it into the namespace
+	 * as if it had been loaded at boot.
+	 */
+	if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) {
+		if (props != NULL)
+			spa_configfile_set(spa, props, B_FALSE);
+
+		spa_config_sync(spa, B_FALSE, B_TRUE);
+
+		mutex_exit(&spa_namespace_lock);
+		spa_history_log_version(spa, LOG_POOL_IMPORT);
+
+		return (0);
+	}
+
+	spa_activate(spa, mode);
+
+	/*
+	 * Don't start async tasks until we know everything is healthy.
+	 */
+	spa_async_suspend(spa);
+
+	zpool_get_rewind_policy(config, &policy);
+	if (policy.zrp_request & ZPOOL_DO_REWIND)
+		state = SPA_LOAD_RECOVER;
+
+	/*
+	 * Pass off the heavy lifting to spa_load().  Pass TRUE for mosconfig
+	 * because the user-supplied config is actually the one to trust when
+	 * doing an import.
+	 */
+	if (state != SPA_LOAD_RECOVER)
+		spa->spa_last_ubsync_txg = spa->spa_load_txg = 0;
+
+	error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg,
+	    policy.zrp_request);
+
+	/*
+	 * Propagate anything learned while loading the pool and pass it
+	 * back to caller (i.e. rewind info, missing devices, etc).
+	 */
+	VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO,
+	    spa->spa_load_info) == 0);
+
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+	/*
+	 * Toss any existing sparelist, as it doesn't have any validity
+	 * anymore, and conflicts with spa_has_spare().
+	 */
+	if (spa->spa_spares.sav_config) {
+		nvlist_free(spa->spa_spares.sav_config);
+		spa->spa_spares.sav_config = NULL;
+		spa_load_spares(spa);
+	}
+	if (spa->spa_l2cache.sav_config) {
+		nvlist_free(spa->spa_l2cache.sav_config);
+		spa->spa_l2cache.sav_config = NULL;
+		spa_load_l2cache(spa);
+	}
+
+	VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
+	    &nvroot) == 0);
+	if (error == 0)
+		error = spa_validate_aux(spa, nvroot, -1ULL,
+		    VDEV_ALLOC_SPARE);
+	if (error == 0)
+		error = spa_validate_aux(spa, nvroot, -1ULL,
+		    VDEV_ALLOC_L2CACHE);
+	spa_config_exit(spa, SCL_ALL, FTAG);
+
+	if (props != NULL)
+		spa_configfile_set(spa, props, B_FALSE);
+
+	if (error != 0 || (props && spa_writeable(spa) &&
+	    (error = spa_prop_set(spa, props)))) {
+		spa_unload(spa);
+		spa_deactivate(spa);
+		spa_remove(spa);
+		mutex_exit(&spa_namespace_lock);
+		return (error);
+	}
+
+	spa_async_resume(spa);
+
+	/*
+	 * Override any spares and level 2 cache devices as specified by
+	 * the user, as these may have correct device names/devids, etc.
+	 */
+	if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
+	    &spares, &nspares) == 0) {
+		if (spa->spa_spares.sav_config)
+			VERIFY(nvlist_remove(spa->spa_spares.sav_config,
+			    ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0);
+		else
+			VERIFY(nvlist_alloc(&spa->spa_spares.sav_config,
+			    NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
+		    ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
+		spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+		spa_load_spares(spa);
+		spa_config_exit(spa, SCL_ALL, FTAG);
+		spa->spa_spares.sav_sync = B_TRUE;
+	}
+	if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
+	    &l2cache, &nl2cache) == 0) {
+		if (spa->spa_l2cache.sav_config)
+			VERIFY(nvlist_remove(spa->spa_l2cache.sav_config,
+			    ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0);
+		else
+			VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config,
+			    NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config,
+		    ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
+		spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+		spa_load_l2cache(spa);
+		spa_config_exit(spa, SCL_ALL, FTAG);
+		spa->spa_l2cache.sav_sync = B_TRUE;
+	}
+
+	/*
+	 * Check for any removed devices.
+	 */
+	if (spa->spa_autoreplace) {
+		spa_aux_check_removed(&spa->spa_spares);
+		spa_aux_check_removed(&spa->spa_l2cache);
+	}
+
+	if (spa_writeable(spa)) {
+		/*
+		 * Update the config cache to include the newly-imported pool.
+		 */
+		spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
+	}
+
+	/*
+	 * It's possible that the pool was expanded while it was exported.
+	 * We kick off an async task to handle this for us.
+	 */
+	spa_async_request(spa, SPA_ASYNC_AUTOEXPAND);
+
+	mutex_exit(&spa_namespace_lock);
+	spa_history_log_version(spa, LOG_POOL_IMPORT);
+
+	return (0);
+}
+
+nvlist_t *
+spa_tryimport(nvlist_t *tryconfig)
+{
+	nvlist_t *config = NULL;
+	char *poolname;
+	spa_t *spa;
+	uint64_t state;
+	int error;
+
+	if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname))
+		return (NULL);
+
+	if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state))
+		return (NULL);
+
+	/*
+	 * Create and initialize the spa structure.
+	 */
+	mutex_enter(&spa_namespace_lock);
+	spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL);
+	spa_activate(spa, FREAD);
+
+	/*
+	 * Pass off the heavy lifting to spa_load().
+	 * Pass TRUE for mosconfig because the user-supplied config
+	 * is actually the one to trust when doing an import.
+	 */
+	error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE);
+
+	/*
+	 * If 'tryconfig' was at least parsable, return the current config.
+	 */
+	if (spa->spa_root_vdev != NULL) {
+		config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
+		VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME,
+		    poolname) == 0);
+		VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
+		    state) == 0);
+		VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP,
+		    spa->spa_uberblock.ub_timestamp) == 0);
+
+		/*
+		 * If the bootfs property exists on this pool then we
+		 * copy it out so that external consumers can tell which
+		 * pools are bootable.
+		 */
+		if ((!error || error == EEXIST) && spa->spa_bootfs) {
+			char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
+
+			/*
+			 * We have to play games with the name since the
+			 * pool was opened as TRYIMPORT_NAME.
+			 */
+			if (dsl_dsobj_to_dsname(spa_name(spa),
+			    spa->spa_bootfs, tmpname) == 0) {
+				char *cp;
+				char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
+
+				cp = strchr(tmpname, '/');
+				if (cp == NULL) {
+					(void) strlcpy(dsname, tmpname,
+					    MAXPATHLEN);
+				} else {
+					(void) snprintf(dsname, MAXPATHLEN,
+					    "%s/%s", poolname, ++cp);
+				}
+				VERIFY(nvlist_add_string(config,
+				    ZPOOL_CONFIG_BOOTFS, dsname) == 0);
+				kmem_free(dsname, MAXPATHLEN);
+			}
+			kmem_free(tmpname, MAXPATHLEN);
+		}
+
+		/*
+		 * Add the list of hot spares and level 2 cache devices.
+		 */
+		spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
+		spa_add_spares(spa, config);
+		spa_add_l2cache(spa, config);
+		spa_config_exit(spa, SCL_CONFIG, FTAG);
+	}
+
+	spa_unload(spa);
+	spa_deactivate(spa);
+	spa_remove(spa);
+	mutex_exit(&spa_namespace_lock);
+
+	return (config);
+}
+
+/*
+ * Pool export/destroy
+ *
+ * The act of destroying or exporting a pool is very simple.  We make sure there
+ * is no more pending I/O and any references to the pool are gone.  Then, we
+ * update the pool state and sync all the labels to disk, removing the
+ * configuration from the cache afterwards. If the 'hardforce' flag is set, then
+ * we don't sync the labels or remove the configuration cache.
+ */
+static int
+spa_export_common(char *pool, int new_state, nvlist_t **oldconfig,
+    boolean_t force, boolean_t hardforce)
+{
+	spa_t *spa;
+
+	if (oldconfig)
+		*oldconfig = NULL;
+
+	if (!(spa_mode_global & FWRITE))
+		return (EROFS);
+
+	mutex_enter(&spa_namespace_lock);
+	if ((spa = spa_lookup(pool)) == NULL) {
+		mutex_exit(&spa_namespace_lock);
+		return (ENOENT);
+	}
+
+	/*
+	 * Put a hold on the pool, drop the namespace lock, stop async tasks,
+	 * reacquire the namespace lock, and see if we can export.
+	 */
+	spa_open_ref(spa, FTAG);
+	mutex_exit(&spa_namespace_lock);
+	spa_async_suspend(spa);
+	mutex_enter(&spa_namespace_lock);
+	spa_close(spa, FTAG);
+
+	/*
+	 * The pool will be in core if it's openable,
+	 * in which case we can modify its state.
+	 */
+	if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) {
+		/*
+		 * Objsets may be open only because they're dirty, so we
+		 * have to force it to sync before checking spa_refcnt.
+		 */
+		txg_wait_synced(spa->spa_dsl_pool, 0);
+
+		/*
+		 * A pool cannot be exported or destroyed if there are active
+		 * references.  If we are resetting a pool, allow references by
+		 * fault injection handlers.
+		 */
+		if (!spa_refcount_zero(spa) ||
+		    (spa->spa_inject_ref != 0 &&
+		    new_state != POOL_STATE_UNINITIALIZED)) {
+			spa_async_resume(spa);
+			mutex_exit(&spa_namespace_lock);
+			return (EBUSY);
+		}
+
+		/*
+		 * A pool cannot be exported if it has an active shared spare.
+		 * This is to prevent other pools stealing the active spare
+		 * from an exported pool. At user's own will, such pool can
+		 * be forcedly exported.
+		 */
+		if (!force && new_state == POOL_STATE_EXPORTED &&
+		    spa_has_active_shared_spare(spa)) {
+			spa_async_resume(spa);
+			mutex_exit(&spa_namespace_lock);
+			return (EXDEV);
+		}
+
+		/*
+		 * We want this to be reflected on every label,
+		 * so mark them all dirty.  spa_unload() will do the
+		 * final sync that pushes these changes out.
+		 */
+		if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) {
+			spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+			spa->spa_state = new_state;
+			spa->spa_final_txg = spa_last_synced_txg(spa) +
+			    TXG_DEFER_SIZE + 1;
+			vdev_config_dirty(spa->spa_root_vdev);
+			spa_config_exit(spa, SCL_ALL, FTAG);
+		}
+	}
+
+	spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY);
+
+	if (spa->spa_state != POOL_STATE_UNINITIALIZED) {
+		spa_unload(spa);
+		spa_deactivate(spa);
+	}
+
+	if (oldconfig && spa->spa_config)
+		VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0);
+
+	if (new_state != POOL_STATE_UNINITIALIZED) {
+		if (!hardforce)
+			spa_config_sync(spa, B_TRUE, B_TRUE);
+		spa_remove(spa);
+	}
+	mutex_exit(&spa_namespace_lock);
+
+	return (0);
+}
+
+/*
+ * Destroy a storage pool.
+ */
+int
+spa_destroy(char *pool)
+{
+	return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL,
+	    B_FALSE, B_FALSE));
+}
+
+/*
+ * Export a storage pool.
+ */
+int
+spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
+    boolean_t hardforce)
+{
+	return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig,
+	    force, hardforce));
+}
+
+/*
+ * Similar to spa_export(), this unloads the spa_t without actually removing it
+ * from the namespace in any way.
+ */
+int
+spa_reset(char *pool)
+{
+	return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL,
+	    B_FALSE, B_FALSE));
+}
+
+/*
+ * ==========================================================================
+ * Device manipulation
+ * ==========================================================================
+ */
+
+/*
+ * Add a device to a storage pool.
+ */
+int
+spa_vdev_add(spa_t *spa, nvlist_t *nvroot)
+{
+	uint64_t txg, id;
+	int error;
+	vdev_t *rvd = spa->spa_root_vdev;
+	vdev_t *vd, *tvd;
+	nvlist_t **spares, **l2cache;
+	uint_t nspares, nl2cache;
+
+	ASSERT(spa_writeable(spa));
+
+	txg = spa_vdev_enter(spa);
+
+	if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0,
+	    VDEV_ALLOC_ADD)) != 0)
+		return (spa_vdev_exit(spa, NULL, txg, error));
+
+	spa->spa_pending_vdev = vd;	/* spa_vdev_exit() will clear this */
+
+	if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares,
+	    &nspares) != 0)
+		nspares = 0;
+
+	if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache,
+	    &nl2cache) != 0)
+		nl2cache = 0;
+
+	if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0)
+		return (spa_vdev_exit(spa, vd, txg, EINVAL));
+
+	if (vd->vdev_children != 0 &&
+	    (error = vdev_create(vd, txg, B_FALSE)) != 0)
+		return (spa_vdev_exit(spa, vd, txg, error));
+
+	/*
+	 * We must validate the spares and l2cache devices after checking the
+	 * children.  Otherwise, vdev_inuse() will blindly overwrite the spare.
+	 */
+	if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0)
+		return (spa_vdev_exit(spa, vd, txg, error));
+
+	/*
+	 * Transfer each new top-level vdev from vd to rvd.
+	 */
+	for (int c = 0; c < vd->vdev_children; c++) {
+
+		/*
+		 * Set the vdev id to the first hole, if one exists.
+		 */
+		for (id = 0; id < rvd->vdev_children; id++) {
+			if (rvd->vdev_child[id]->vdev_ishole) {
+				vdev_free(rvd->vdev_child[id]);
+				break;
+			}
+		}
+		tvd = vd->vdev_child[c];
+		vdev_remove_child(vd, tvd);
+		tvd->vdev_id = id;
+		vdev_add_child(rvd, tvd);
+		vdev_config_dirty(tvd);
+	}
+
+	if (nspares != 0) {
+		spa_set_aux_vdevs(&spa->spa_spares, spares, nspares,
+		    ZPOOL_CONFIG_SPARES);
+		spa_load_spares(spa);
+		spa->spa_spares.sav_sync = B_TRUE;
+	}
+
+	if (nl2cache != 0) {
+		spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache,
+		    ZPOOL_CONFIG_L2CACHE);
+		spa_load_l2cache(spa);
+		spa->spa_l2cache.sav_sync = B_TRUE;
+	}
+
+	/*
+	 * We have to be careful when adding new vdevs to an existing pool.
+	 * If other threads start allocating from these vdevs before we
+	 * sync the config cache, and we lose power, then upon reboot we may
+	 * fail to open the pool because there are DVAs that the config cache
+	 * can't translate.  Therefore, we first add the vdevs without
+	 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
+	 * and then let spa_config_update() initialize the new metaslabs.
+	 *
+	 * spa_load() checks for added-but-not-initialized vdevs, so that
+	 * if we lose power at any point in this sequence, the remaining
+	 * steps will be completed the next time we load the pool.
+	 */
+	(void) spa_vdev_exit(spa, vd, txg, 0);
+
+	mutex_enter(&spa_namespace_lock);
+	spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
+	mutex_exit(&spa_namespace_lock);
+
+	return (0);
+}
+
+/*
+ * Attach a device to a mirror.  The arguments are the path to any device
+ * in the mirror, and the nvroot for the new device.  If the path specifies
+ * a device that is not mirrored, we automatically insert the mirror vdev.
+ *
+ * If 'replacing' is specified, the new device is intended to replace the
+ * existing device; in this case the two devices are made into their own
+ * mirror using the 'replacing' vdev, which is functionally identical to
+ * the mirror vdev (it actually reuses all the same ops) but has a few
+ * extra rules: you can't attach to it after it's been created, and upon
+ * completion of resilvering, the first disk (the one being replaced)
+ * is automatically detached.
+ */
+int
+spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing)
+{
+	uint64_t txg, dtl_max_txg;
+	vdev_t *rvd = spa->spa_root_vdev;
+	vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd;
+	vdev_ops_t *pvops;
+	char *oldvdpath, *newvdpath;
+	int newvd_isspare;
+	int error;
+
+	ASSERT(spa_writeable(spa));
+
+	txg = spa_vdev_enter(spa);
+
+	oldvd = spa_lookup_by_guid(spa, guid, B_FALSE);
+
+	if (oldvd == NULL)
+		return (spa_vdev_exit(spa, NULL, txg, ENODEV));
+
+	if (!oldvd->vdev_ops->vdev_op_leaf)
+		return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
+
+	pvd = oldvd->vdev_parent;
+
+	if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0,
+	    VDEV_ALLOC_ADD)) != 0)
+		return (spa_vdev_exit(spa, NULL, txg, EINVAL));
+
+	if (newrootvd->vdev_children != 1)
+		return (spa_vdev_exit(spa, newrootvd, txg, EINVAL));
+
+	newvd = newrootvd->vdev_child[0];
+
+	if (!newvd->vdev_ops->vdev_op_leaf)
+		return (spa_vdev_exit(spa, newrootvd, txg, EINVAL));
+
+	if ((error = vdev_create(newrootvd, txg, replacing)) != 0)
+		return (spa_vdev_exit(spa, newrootvd, txg, error));
+
+	/*
+	 * Spares can't replace logs
+	 */
+	if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare)
+		return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
+
+	if (!replacing) {
+		/*
+		 * For attach, the only allowable parent is a mirror or the root
+		 * vdev.
+		 */
+		if (pvd->vdev_ops != &vdev_mirror_ops &&
+		    pvd->vdev_ops != &vdev_root_ops)
+			return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
+
+		pvops = &vdev_mirror_ops;
+	} else {
+		/*
+		 * Active hot spares can only be replaced by inactive hot
+		 * spares.
+		 */
+		if (pvd->vdev_ops == &vdev_spare_ops &&
+		    oldvd->vdev_isspare &&
+		    !spa_has_spare(spa, newvd->vdev_guid))
+			return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
+
+		/*
+		 * If the source is a hot spare, and the parent isn't already a
+		 * spare, then we want to create a new hot spare.  Otherwise, we
+		 * want to create a replacing vdev.  The user is not allowed to
+		 * attach to a spared vdev child unless the 'isspare' state is
+		 * the same (spare replaces spare, non-spare replaces
+		 * non-spare).
+		 */
+		if (pvd->vdev_ops == &vdev_replacing_ops &&
+		    spa_version(spa) < SPA_VERSION_MULTI_REPLACE) {
+			return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
+		} else if (pvd->vdev_ops == &vdev_spare_ops &&
+		    newvd->vdev_isspare != oldvd->vdev_isspare) {
+			return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
+		}
+
+		if (newvd->vdev_isspare)
+			pvops = &vdev_spare_ops;
+		else
+			pvops = &vdev_replacing_ops;
+	}
+
+	/*
+	 * Make sure the new device is big enough.
+	 */
+	if (newvd->vdev_asize < vdev_get_min_asize(oldvd))
+		return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW));
+
+	/*
+	 * The new device cannot have a higher alignment requirement
+	 * than the top-level vdev.
+	 */
+	if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift)
+		return (spa_vdev_exit(spa, newrootvd, txg, EDOM));
+
+	/*
+	 * If this is an in-place replacement, update oldvd's path and devid
+	 * to make it distinguishable from newvd, and unopenable from now on.
+	 */
+	if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) {
+		spa_strfree(oldvd->vdev_path);
+		oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5,
+		    KM_SLEEP);
+		(void) sprintf(oldvd->vdev_path, "%s/%s",
+		    newvd->vdev_path, "old");
+		if (oldvd->vdev_devid != NULL) {
+			spa_strfree(oldvd->vdev_devid);
+			oldvd->vdev_devid = NULL;
+		}
+	}
+
+	/* mark the device being resilvered */
+	newvd->vdev_resilvering = B_TRUE;
+
+	/*
+	 * If the parent is not a mirror, or if we're replacing, insert the new
+	 * mirror/replacing/spare vdev above oldvd.
+	 */
+	if (pvd->vdev_ops != pvops)
+		pvd = vdev_add_parent(oldvd, pvops);
+
+	ASSERT(pvd->vdev_top->vdev_parent == rvd);
+	ASSERT(pvd->vdev_ops == pvops);
+	ASSERT(oldvd->vdev_parent == pvd);
+
+	/*
+	 * Extract the new device from its root and add it to pvd.
+	 */
+	vdev_remove_child(newrootvd, newvd);
+	newvd->vdev_id = pvd->vdev_children;
+	newvd->vdev_crtxg = oldvd->vdev_crtxg;
+	vdev_add_child(pvd, newvd);
+
+	tvd = newvd->vdev_top;
+	ASSERT(pvd->vdev_top == tvd);
+	ASSERT(tvd->vdev_parent == rvd);
+
+	vdev_config_dirty(tvd);
+
+	/*
+	 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
+	 * for any dmu_sync-ed blocks.  It will propagate upward when
+	 * spa_vdev_exit() calls vdev_dtl_reassess().
+	 */
+	dtl_max_txg = txg + TXG_CONCURRENT_STATES;
+
+	vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL,
+	    dtl_max_txg - TXG_INITIAL);
+
+	if (newvd->vdev_isspare) {
+		spa_spare_activate(newvd);
+		spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE);
+	}
+
+	oldvdpath = spa_strdup(oldvd->vdev_path);
+	newvdpath = spa_strdup(newvd->vdev_path);
+	newvd_isspare = newvd->vdev_isspare;
+
+	/*
+	 * Mark newvd's DTL dirty in this txg.
+	 */
+	vdev_dirty(tvd, VDD_DTL, newvd, txg);
+
+	/*
+	 * Restart the resilver
+	 */
+	dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg);
+
+	/*
+	 * Commit the config
+	 */
+	(void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0);
+
+	spa_history_log_internal(LOG_POOL_VDEV_ATTACH, spa, NULL,
+	    "%s vdev=%s %s vdev=%s",
+	    replacing && newvd_isspare ? "spare in" :
+	    replacing ? "replace" : "attach", newvdpath,
+	    replacing ? "for" : "to", oldvdpath);
+
+	spa_strfree(oldvdpath);
+	spa_strfree(newvdpath);
+
+	if (spa->spa_bootfs)
+		spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH);
+
+	return (0);
+}
+
+/*
+ * Detach a device from a mirror or replacing vdev.
+ * If 'replace_done' is specified, only detach if the parent
+ * is a replacing vdev.
+ */
+int
+spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done)
+{
+	uint64_t txg;
+	int error;
+	vdev_t *rvd = spa->spa_root_vdev;
+	vdev_t *vd, *pvd, *cvd, *tvd;
+	boolean_t unspare = B_FALSE;
+	uint64_t unspare_guid;
+	char *vdpath;
+
+	ASSERT(spa_writeable(spa));
+
+	txg = spa_vdev_enter(spa);
+
+	vd = spa_lookup_by_guid(spa, guid, B_FALSE);
+
+	if (vd == NULL)
+		return (spa_vdev_exit(spa, NULL, txg, ENODEV));
+
+	if (!vd->vdev_ops->vdev_op_leaf)
+		return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
+
+	pvd = vd->vdev_parent;
+
+	/*
+	 * If the parent/child relationship is not as expected, don't do it.
+	 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
+	 * vdev that's replacing B with C.  The user's intent in replacing
+	 * is to go from M(A,B) to M(A,C).  If the user decides to cancel
+	 * the replace by detaching C, the expected behavior is to end up
+	 * M(A,B).  But suppose that right after deciding to detach C,
+	 * the replacement of B completes.  We would have M(A,C), and then
+	 * ask to detach C, which would leave us with just A -- not what
+	 * the user wanted.  To prevent this, we make sure that the
+	 * parent/child relationship hasn't changed -- in this example,
+	 * that C's parent is still the replacing vdev R.
+	 */
+	if (pvd->vdev_guid != pguid && pguid != 0)
+		return (spa_vdev_exit(spa, NULL, txg, EBUSY));
+
+	/*
+	 * Only 'replacing' or 'spare' vdevs can be replaced.
+	 */
+	if (replace_done && pvd->vdev_ops != &vdev_replacing_ops &&
+	    pvd->vdev_ops != &vdev_spare_ops)
+		return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
+
+	ASSERT(pvd->vdev_ops != &vdev_spare_ops ||
+	    spa_version(spa) >= SPA_VERSION_SPARES);
+
+	/*
+	 * Only mirror, replacing, and spare vdevs support detach.
+	 */
+	if (pvd->vdev_ops != &vdev_replacing_ops &&
+	    pvd->vdev_ops != &vdev_mirror_ops &&
+	    pvd->vdev_ops != &vdev_spare_ops)
+		return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
+
+	/*
+	 * If this device has the only valid copy of some data,
+	 * we cannot safely detach it.
+	 */
+	if (vdev_dtl_required(vd))
+		return (spa_vdev_exit(spa, NULL, txg, EBUSY));
+
+	ASSERT(pvd->vdev_children >= 2);
+
+	/*
+	 * If we are detaching the second disk from a replacing vdev, then
+	 * check to see if we changed the original vdev's path to have "/old"
+	 * at the end in spa_vdev_attach().  If so, undo that change now.
+	 */
+	if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 &&
+	    vd->vdev_path != NULL) {
+		size_t len = strlen(vd->vdev_path);
+
+		for (int c = 0; c < pvd->vdev_children; c++) {
+			cvd = pvd->vdev_child[c];
+
+			if (cvd == vd || cvd->vdev_path == NULL)
+				continue;
+
+			if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 &&
+			    strcmp(cvd->vdev_path + len, "/old") == 0) {
+				spa_strfree(cvd->vdev_path);
+				cvd->vdev_path = spa_strdup(vd->vdev_path);
+				break;
+			}
+		}
+	}
+
+	/*
+	 * If we are detaching the original disk from a spare, then it implies
+	 * that the spare should become a real disk, and be removed from the
+	 * active spare list for the pool.
+	 */
+	if (pvd->vdev_ops == &vdev_spare_ops &&
+	    vd->vdev_id == 0 &&
+	    pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare)
+		unspare = B_TRUE;
+
+	/*
+	 * Erase the disk labels so the disk can be used for other things.
+	 * This must be done after all other error cases are handled,
+	 * but before we disembowel vd (so we can still do I/O to it).
+	 * But if we can't do it, don't treat the error as fatal --
+	 * it may be that the unwritability of the disk is the reason
+	 * it's being detached!
+	 */
+	error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE);
+
+	/*
+	 * Remove vd from its parent and compact the parent's children.
+	 */
+	vdev_remove_child(pvd, vd);
+	vdev_compact_children(pvd);
+
+	/*
+	 * Remember one of the remaining children so we can get tvd below.
+	 */
+	cvd = pvd->vdev_child[pvd->vdev_children - 1];
+
+	/*
+	 * If we need to remove the remaining child from the list of hot spares,
+	 * do it now, marking the vdev as no longer a spare in the process.
+	 * We must do this before vdev_remove_parent(), because that can
+	 * change the GUID if it creates a new toplevel GUID.  For a similar
+	 * reason, we must remove the spare now, in the same txg as the detach;
+	 * otherwise someone could attach a new sibling, change the GUID, and
+	 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
+	 */
+	if (unspare) {
+		ASSERT(cvd->vdev_isspare);
+		spa_spare_remove(cvd);
+		unspare_guid = cvd->vdev_guid;
+		(void) spa_vdev_remove(spa, unspare_guid, B_TRUE);
+		cvd->vdev_unspare = B_TRUE;
+	}
+
+	/*
+	 * If the parent mirror/replacing vdev only has one child,
+	 * the parent is no longer needed.  Remove it from the tree.
+	 */
+	if (pvd->vdev_children == 1) {
+		if (pvd->vdev_ops == &vdev_spare_ops)
+			cvd->vdev_unspare = B_FALSE;
+		vdev_remove_parent(cvd);
+		cvd->vdev_resilvering = B_FALSE;
+	}
+
+
+	/*
+	 * We don't set tvd until now because the parent we just removed
+	 * may have been the previous top-level vdev.
+	 */
+	tvd = cvd->vdev_top;
+	ASSERT(tvd->vdev_parent == rvd);
+
+	/*
+	 * Reevaluate the parent vdev state.
+	 */
+	vdev_propagate_state(cvd);
+
+	/*
+	 * If the 'autoexpand' property is set on the pool then automatically
+	 * try to expand the size of the pool. For example if the device we
+	 * just detached was smaller than the others, it may be possible to
+	 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
+	 * first so that we can obtain the updated sizes of the leaf vdevs.
+	 */
+	if (spa->spa_autoexpand) {
+		vdev_reopen(tvd);
+		vdev_expand(tvd, txg);
+	}
+
+	vdev_config_dirty(tvd);
+
+	/*
+	 * Mark vd's DTL as dirty in this txg.  vdev_dtl_sync() will see that
+	 * vd->vdev_detached is set and free vd's DTL object in syncing context.
+	 * But first make sure we're not on any *other* txg's DTL list, to
+	 * prevent vd from being accessed after it's freed.
+	 */
+	vdpath = spa_strdup(vd->vdev_path);
+	for (int t = 0; t < TXG_SIZE; t++)
+		(void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t);
+	vd->vdev_detached = B_TRUE;
+	vdev_dirty(tvd, VDD_DTL, vd, txg);
+
+	spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE);
+
+	/* hang on to the spa before we release the lock */
+	spa_open_ref(spa, FTAG);
+
+	error = spa_vdev_exit(spa, vd, txg, 0);
+
+	spa_history_log_internal(LOG_POOL_VDEV_DETACH, spa, NULL,
+	    "vdev=%s", vdpath);
+	spa_strfree(vdpath);
+
+	/*
+	 * If this was the removal of the original device in a hot spare vdev,
+	 * then we want to go through and remove the device from the hot spare
+	 * list of every other pool.
+	 */
+	if (unspare) {
+		spa_t *altspa = NULL;
+
+		mutex_enter(&spa_namespace_lock);
+		while ((altspa = spa_next(altspa)) != NULL) {
+			if (altspa->spa_state != POOL_STATE_ACTIVE ||
+			    altspa == spa)
+				continue;
+
+			spa_open_ref(altspa, FTAG);
+			mutex_exit(&spa_namespace_lock);
+			(void) spa_vdev_remove(altspa, unspare_guid, B_TRUE);
+			mutex_enter(&spa_namespace_lock);
+			spa_close(altspa, FTAG);
+		}
+		mutex_exit(&spa_namespace_lock);
+
+		/* search the rest of the vdevs for spares to remove */
+		spa_vdev_resilver_done(spa);
+	}
+
+	/* all done with the spa; OK to release */
+	mutex_enter(&spa_namespace_lock);
+	spa_close(spa, FTAG);
+	mutex_exit(&spa_namespace_lock);
+
+	return (error);
+}
+
+/*
+ * Split a set of devices from their mirrors, and create a new pool from them.
+ */
+int
+spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
+    nvlist_t *props, boolean_t exp)
+{
+	int error = 0;
+	uint64_t txg, *glist;
+	spa_t *newspa;
+	uint_t c, children, lastlog;
+	nvlist_t **child, *nvl, *tmp;
+	dmu_tx_t *tx;
+	char *altroot = NULL;
+	vdev_t *rvd, **vml = NULL;			/* vdev modify list */
+	boolean_t activate_slog;
+
+	ASSERT(spa_writeable(spa));
+
+	txg = spa_vdev_enter(spa);
+
+	/* clear the log and flush everything up to now */
+	activate_slog = spa_passivate_log(spa);
+	(void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
+	error = spa_offline_log(spa);
+	txg = spa_vdev_config_enter(spa);
+
+	if (activate_slog)
+		spa_activate_log(spa);
+
+	if (error != 0)
+		return (spa_vdev_exit(spa, NULL, txg, error));
+
+	/* check new spa name before going any further */
+	if (spa_lookup(newname) != NULL)
+		return (spa_vdev_exit(spa, NULL, txg, EEXIST));
+
+	/*
+	 * scan through all the children to ensure they're all mirrors
+	 */
+	if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 ||
+	    nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child,
+	    &children) != 0)
+		return (spa_vdev_exit(spa, NULL, txg, EINVAL));
+
+	/* first, check to ensure we've got the right child count */
+	rvd = spa->spa_root_vdev;
+	lastlog = 0;
+	for (c = 0; c < rvd->vdev_children; c++) {
+		vdev_t *vd = rvd->vdev_child[c];
+
+		/* don't count the holes & logs as children */
+		if (vd->vdev_islog || vd->vdev_ishole) {
+			if (lastlog == 0)
+				lastlog = c;
+			continue;
+		}
+
+		lastlog = 0;
+	}
+	if (children != (lastlog != 0 ? lastlog : rvd->vdev_children))
+		return (spa_vdev_exit(spa, NULL, txg, EINVAL));
+
+	/* next, ensure no spare or cache devices are part of the split */
+	if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 ||
+	    nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0)
+		return (spa_vdev_exit(spa, NULL, txg, EINVAL));
+
+	vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP);
+	glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP);
+
+	/* then, loop over each vdev and validate it */
+	for (c = 0; c < children; c++) {
+		uint64_t is_hole = 0;
+
+		(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE,
+		    &is_hole);
+
+		if (is_hole != 0) {
+			if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole ||
+			    spa->spa_root_vdev->vdev_child[c]->vdev_islog) {
+				continue;
+			} else {
+				error = EINVAL;
+				break;
+			}
+		}
+
+		/* which disk is going to be split? */
+		if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID,
+		    &glist[c]) != 0) {
+			error = EINVAL;
+			break;
+		}
+
+		/* look it up in the spa */
+		vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE);
+		if (vml[c] == NULL) {
+			error = ENODEV;
+			break;
+		}
+
+		/* make sure there's nothing stopping the split */
+		if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops ||
+		    vml[c]->vdev_islog ||
+		    vml[c]->vdev_ishole ||
+		    vml[c]->vdev_isspare ||
+		    vml[c]->vdev_isl2cache ||
+		    !vdev_writeable(vml[c]) ||
+		    vml[c]->vdev_children != 0 ||
+		    vml[c]->vdev_state != VDEV_STATE_HEALTHY ||
+		    c != spa->spa_root_vdev->vdev_child[c]->vdev_id) {
+			error = EINVAL;
+			break;
+		}
+
+		if (vdev_dtl_required(vml[c])) {
+			error = EBUSY;
+			break;
+		}
+
+		/* we need certain info from the top level */
+		VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY,
+		    vml[c]->vdev_top->vdev_ms_array) == 0);
+		VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT,
+		    vml[c]->vdev_top->vdev_ms_shift) == 0);
+		VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE,
+		    vml[c]->vdev_top->vdev_asize) == 0);
+		VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT,
+		    vml[c]->vdev_top->vdev_ashift) == 0);
+	}
+
+	if (error != 0) {
+		kmem_free(vml, children * sizeof (vdev_t *));
+		kmem_free(glist, children * sizeof (uint64_t));
+		return (spa_vdev_exit(spa, NULL, txg, error));
+	}
+
+	/* stop writers from using the disks */
+	for (c = 0; c < children; c++) {
+		if (vml[c] != NULL)
+			vml[c]->vdev_offline = B_TRUE;
+	}
+	vdev_reopen(spa->spa_root_vdev);
+
+	/*
+	 * Temporarily record the splitting vdevs in the spa config.  This
+	 * will disappear once the config is regenerated.
+	 */
+	VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST,
+	    glist, children) == 0);
+	kmem_free(glist, children * sizeof (uint64_t));
+
+	mutex_enter(&spa->spa_props_lock);
+	VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT,
+	    nvl) == 0);
+	mutex_exit(&spa->spa_props_lock);
+	spa->spa_config_splitting = nvl;
+	vdev_config_dirty(spa->spa_root_vdev);
+
+	/* configure and create the new pool */
+	VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0);
+	VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
+	    exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0);
+	VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION,
+	    spa_version(spa)) == 0);
+	VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG,
+	    spa->spa_config_txg) == 0);
+	VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID,
+	    spa_generate_guid(NULL)) == 0);
+	(void) nvlist_lookup_string(props,
+	    zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
+
+	/* add the new pool to the namespace */
+	newspa = spa_add(newname, config, altroot);
+	newspa->spa_config_txg = spa->spa_config_txg;
+	spa_set_log_state(newspa, SPA_LOG_CLEAR);
+
+	/* release the spa config lock, retaining the namespace lock */
+	spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
+
+	if (zio_injection_enabled)
+		zio_handle_panic_injection(spa, FTAG, 1);
+
+	spa_activate(newspa, spa_mode_global);
+	spa_async_suspend(newspa);
+
+	/* create the new pool from the disks of the original pool */
+	error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE);
+	if (error)
+		goto out;
+
+	/* if that worked, generate a real config for the new pool */
+	if (newspa->spa_root_vdev != NULL) {
+		VERIFY(nvlist_alloc(&newspa->spa_config_splitting,
+		    NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		VERIFY(nvlist_add_uint64(newspa->spa_config_splitting,
+		    ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0);
+		spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL,
+		    B_TRUE));
+	}
+
+	/* set the props */
+	if (props != NULL) {
+		spa_configfile_set(newspa, props, B_FALSE);
+		error = spa_prop_set(newspa, props);
+		if (error)
+			goto out;
+	}
+
+	/* flush everything */
+	txg = spa_vdev_config_enter(newspa);
+	vdev_config_dirty(newspa->spa_root_vdev);
+	(void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG);
+
+	if (zio_injection_enabled)
+		zio_handle_panic_injection(spa, FTAG, 2);
+
+	spa_async_resume(newspa);
+
+	/* finally, update the original pool's config */
+	txg = spa_vdev_config_enter(spa);
+	tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
+	error = dmu_tx_assign(tx, TXG_WAIT);
+	if (error != 0)
+		dmu_tx_abort(tx);
+	for (c = 0; c < children; c++) {
+		if (vml[c] != NULL) {
+			vdev_split(vml[c]);
+			if (error == 0)
+				spa_history_log_internal(LOG_POOL_VDEV_DETACH,
+				    spa, tx, "vdev=%s",
+				    vml[c]->vdev_path);
+			vdev_free(vml[c]);
+		}
+	}
+	vdev_config_dirty(spa->spa_root_vdev);
+	spa->spa_config_splitting = NULL;
+	nvlist_free(nvl);
+	if (error == 0)
+		dmu_tx_commit(tx);
+	(void) spa_vdev_exit(spa, NULL, txg, 0);
+
+	if (zio_injection_enabled)
+		zio_handle_panic_injection(spa, FTAG, 3);
+
+	/* split is complete; log a history record */
+	spa_history_log_internal(LOG_POOL_SPLIT, newspa, NULL,
+	    "split new pool %s from pool %s", newname, spa_name(spa));
+
+	kmem_free(vml, children * sizeof (vdev_t *));
+
+	/* if we're not going to mount the filesystems in userland, export */
+	if (exp)
+		error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL,
+		    B_FALSE, B_FALSE);
+
+	return (error);
+
+out:
+	spa_unload(newspa);
+	spa_deactivate(newspa);
+	spa_remove(newspa);
+
+	txg = spa_vdev_config_enter(spa);
+
+	/* re-online all offlined disks */
+	for (c = 0; c < children; c++) {
+		if (vml[c] != NULL)
+			vml[c]->vdev_offline = B_FALSE;
+	}
+	vdev_reopen(spa->spa_root_vdev);
+
+	nvlist_free(spa->spa_config_splitting);
+	spa->spa_config_splitting = NULL;
+	(void) spa_vdev_exit(spa, NULL, txg, error);
+
+	kmem_free(vml, children * sizeof (vdev_t *));
+	return (error);
+}
+
+static nvlist_t *
+spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid)
+{
+	for (int i = 0; i < count; i++) {
+		uint64_t guid;
+
+		VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID,
+		    &guid) == 0);
+
+		if (guid == target_guid)
+			return (nvpp[i]);
+	}
+
+	return (NULL);
+}
+
+static void
+spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count,
+	nvlist_t *dev_to_remove)
+{
+	nvlist_t **newdev = NULL;
+
+	if (count > 1)
+		newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP);
+
+	for (int i = 0, j = 0; i < count; i++) {
+		if (dev[i] == dev_to_remove)
+			continue;
+		VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0);
+	}
+
+	VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0);
+	VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0);
+
+	for (int i = 0; i < count - 1; i++)
+		nvlist_free(newdev[i]);
+
+	if (count > 1)
+		kmem_free(newdev, (count - 1) * sizeof (void *));
+}
+
+/*
+ * Evacuate the device.
+ */
+static int
+spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd)
+{
+	uint64_t txg;
+	int error = 0;
+
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
+	ASSERT(vd == vd->vdev_top);
+
+	/*
+	 * Evacuate the device.  We don't hold the config lock as writer
+	 * since we need to do I/O but we do keep the
+	 * spa_namespace_lock held.  Once this completes the device
+	 * should no longer have any blocks allocated on it.
+	 */
+	if (vd->vdev_islog) {
+		if (vd->vdev_stat.vs_alloc != 0)
+			error = spa_offline_log(spa);
+	} else {
+		error = ENOTSUP;
+	}
+
+	if (error)
+		return (error);
+
+	/*
+	 * The evacuation succeeded.  Remove any remaining MOS metadata
+	 * associated with this vdev, and wait for these changes to sync.
+	 */
+	ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0);
+	txg = spa_vdev_config_enter(spa);
+	vd->vdev_removing = B_TRUE;
+	vdev_dirty(vd, 0, NULL, txg);
+	vdev_config_dirty(vd);
+	spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
+
+	return (0);
+}
+
+/*
+ * Complete the removal by cleaning up the namespace.
+ */
+static void
+spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd)
+{
+	vdev_t *rvd = spa->spa_root_vdev;
+	uint64_t id = vd->vdev_id;
+	boolean_t last_vdev = (id == (rvd->vdev_children - 1));
+
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+	ASSERT(vd == vd->vdev_top);
+
+	/*
+	 * Only remove any devices which are empty.
+	 */
+	if (vd->vdev_stat.vs_alloc != 0)
+		return;
+
+	(void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE);
+
+	if (list_link_active(&vd->vdev_state_dirty_node))
+		vdev_state_clean(vd);
+	if (list_link_active(&vd->vdev_config_dirty_node))
+		vdev_config_clean(vd);
+
+	vdev_free(vd);
+
+	if (last_vdev) {
+		vdev_compact_children(rvd);
+	} else {
+		vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops);
+		vdev_add_child(rvd, vd);
+	}
+	vdev_config_dirty(rvd);
+
+	/*
+	 * Reassess the health of our root vdev.
+	 */
+	vdev_reopen(rvd);
+}
+
+/*
+ * Remove a device from the pool -
+ *
+ * Removing a device from the vdev namespace requires several steps
+ * and can take a significant amount of time.  As a result we use
+ * the spa_vdev_config_[enter/exit] functions which allow us to
+ * grab and release the spa_config_lock while still holding the namespace
+ * lock.  During each step the configuration is synced out.
+ */
+
+/*
+ * Remove a device from the pool.  Currently, this supports removing only hot
+ * spares, slogs, and level 2 ARC devices.
+ */
+int
+spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare)
+{
+	vdev_t *vd;
+	metaslab_group_t *mg;
+	nvlist_t **spares, **l2cache, *nv;
+	uint64_t txg = 0;
+	uint_t nspares, nl2cache;
+	int error = 0;
+	boolean_t locked = MUTEX_HELD(&spa_namespace_lock);
+
+	ASSERT(spa_writeable(spa));
+
+	if (!locked)
+		txg = spa_vdev_enter(spa);
+
+	vd = spa_lookup_by_guid(spa, guid, B_FALSE);
+
+	if (spa->spa_spares.sav_vdevs != NULL &&
+	    nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
+	    ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 &&
+	    (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) {
+		/*
+		 * Only remove the hot spare if it's not currently in use
+		 * in this pool.
+		 */
+		if (vd == NULL || unspare) {
+			spa_vdev_remove_aux(spa->spa_spares.sav_config,
+			    ZPOOL_CONFIG_SPARES, spares, nspares, nv);
+			spa_load_spares(spa);
+			spa->spa_spares.sav_sync = B_TRUE;
+		} else {
+			error = EBUSY;
+		}
+	} else if (spa->spa_l2cache.sav_vdevs != NULL &&
+	    nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config,
+	    ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 &&
+	    (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) {
+		/*
+		 * Cache devices can always be removed.
+		 */
+		spa_vdev_remove_aux(spa->spa_l2cache.sav_config,
+		    ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv);
+		spa_load_l2cache(spa);
+		spa->spa_l2cache.sav_sync = B_TRUE;
+	} else if (vd != NULL && vd->vdev_islog) {
+		ASSERT(!locked);
+		ASSERT(vd == vd->vdev_top);
+
+		/*
+		 * XXX - Once we have bp-rewrite this should
+		 * become the common case.
+		 */
+
+		mg = vd->vdev_mg;
+
+		/*
+		 * Stop allocating from this vdev.
+		 */
+		metaslab_group_passivate(mg);
+
+		/*
+		 * Wait for the youngest allocations and frees to sync,
+		 * and then wait for the deferral of those frees to finish.
+		 */
+		spa_vdev_config_exit(spa, NULL,
+		    txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG);
+
+		/*
+		 * Attempt to evacuate the vdev.
+		 */
+		error = spa_vdev_remove_evacuate(spa, vd);
+
+		txg = spa_vdev_config_enter(spa);
+
+		/*
+		 * If we couldn't evacuate the vdev, unwind.
+		 */
+		if (error) {
+			metaslab_group_activate(mg);
+			return (spa_vdev_exit(spa, NULL, txg, error));
+		}
+
+		/*
+		 * Clean up the vdev namespace.
+		 */
+		spa_vdev_remove_from_namespace(spa, vd);
+
+	} else if (vd != NULL) {
+		/*
+		 * Normal vdevs cannot be removed (yet).
+		 */
+		error = ENOTSUP;
+	} else {
+		/*
+		 * There is no vdev of any kind with the specified guid.
+		 */
+		error = ENOENT;
+	}
+
+	if (!locked)
+		return (spa_vdev_exit(spa, NULL, txg, error));
+
+	return (error);
+}
+
+/*
+ * Find any device that's done replacing, or a vdev marked 'unspare' that's
+ * current spared, so we can detach it.
+ */
+static vdev_t *
+spa_vdev_resilver_done_hunt(vdev_t *vd)
+{
+	vdev_t *newvd, *oldvd;
+
+	for (int c = 0; c < vd->vdev_children; c++) {
+		oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]);
+		if (oldvd != NULL)
+			return (oldvd);
+	}
+
+	/*
+	 * Check for a completed replacement.  We always consider the first
+	 * vdev in the list to be the oldest vdev, and the last one to be
+	 * the newest (see spa_vdev_attach() for how that works).  In
+	 * the case where the newest vdev is faulted, we will not automatically
+	 * remove it after a resilver completes.  This is OK as it will require
+	 * user intervention to determine which disk the admin wishes to keep.
+	 */
+	if (vd->vdev_ops == &vdev_replacing_ops) {
+		ASSERT(vd->vdev_children > 1);
+
+		newvd = vd->vdev_child[vd->vdev_children - 1];
+		oldvd = vd->vdev_child[0];
+
+		if (vdev_dtl_empty(newvd, DTL_MISSING) &&
+		    vdev_dtl_empty(newvd, DTL_OUTAGE) &&
+		    !vdev_dtl_required(oldvd))
+			return (oldvd);
+	}
+
+	/*
+	 * Check for a completed resilver with the 'unspare' flag set.
+	 */
+	if (vd->vdev_ops == &vdev_spare_ops) {
+		vdev_t *first = vd->vdev_child[0];
+		vdev_t *last = vd->vdev_child[vd->vdev_children - 1];
+
+		if (last->vdev_unspare) {
+			oldvd = first;
+			newvd = last;
+		} else if (first->vdev_unspare) {
+			oldvd = last;
+			newvd = first;
+		} else {
+			oldvd = NULL;
+		}
+
+		if (oldvd != NULL &&
+		    vdev_dtl_empty(newvd, DTL_MISSING) &&
+		    vdev_dtl_empty(newvd, DTL_OUTAGE) &&
+		    !vdev_dtl_required(oldvd))
+			return (oldvd);
+
+		/*
+		 * If there are more than two spares attached to a disk,
+		 * and those spares are not required, then we want to
+		 * attempt to free them up now so that they can be used
+		 * by other pools.  Once we're back down to a single
+		 * disk+spare, we stop removing them.
+		 */
+		if (vd->vdev_children > 2) {
+			newvd = vd->vdev_child[1];
+
+			if (newvd->vdev_isspare && last->vdev_isspare &&
+			    vdev_dtl_empty(last, DTL_MISSING) &&
+			    vdev_dtl_empty(last, DTL_OUTAGE) &&
+			    !vdev_dtl_required(newvd))
+				return (newvd);
+		}
+	}
+
+	return (NULL);
+}
+
+static void
+spa_vdev_resilver_done(spa_t *spa)
+{
+	vdev_t *vd, *pvd, *ppvd;
+	uint64_t guid, sguid, pguid, ppguid;
+
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+
+	while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) {
+		pvd = vd->vdev_parent;
+		ppvd = pvd->vdev_parent;
+		guid = vd->vdev_guid;
+		pguid = pvd->vdev_guid;
+		ppguid = ppvd->vdev_guid;
+		sguid = 0;
+		/*
+		 * If we have just finished replacing a hot spared device, then
+		 * we need to detach the parent's first child (the original hot
+		 * spare) as well.
+		 */
+		if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 &&
+		    ppvd->vdev_children == 2) {
+			ASSERT(pvd->vdev_ops == &vdev_replacing_ops);
+			sguid = ppvd->vdev_child[1]->vdev_guid;
+		}
+		spa_config_exit(spa, SCL_ALL, FTAG);
+		if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0)
+			return;
+		if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0)
+			return;
+		spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+	}
+
+	spa_config_exit(spa, SCL_ALL, FTAG);
+}
+
+/*
+ * Update the stored path or FRU for this vdev.
+ */
+int
+spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value,
+    boolean_t ispath)
+{
+	vdev_t *vd;
+	boolean_t sync = B_FALSE;
+
+	ASSERT(spa_writeable(spa));
+
+	spa_vdev_state_enter(spa, SCL_ALL);
+
+	if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
+		return (spa_vdev_state_exit(spa, NULL, ENOENT));
+
+	if (!vd->vdev_ops->vdev_op_leaf)
+		return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
+
+	if (ispath) {
+		if (strcmp(value, vd->vdev_path) != 0) {
+			spa_strfree(vd->vdev_path);
+			vd->vdev_path = spa_strdup(value);
+			sync = B_TRUE;
+		}
+	} else {
+		if (vd->vdev_fru == NULL) {
+			vd->vdev_fru = spa_strdup(value);
+			sync = B_TRUE;
+		} else if (strcmp(value, vd->vdev_fru) != 0) {
+			spa_strfree(vd->vdev_fru);
+			vd->vdev_fru = spa_strdup(value);
+			sync = B_TRUE;
+		}
+	}
+
+	return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0));
+}
+
+int
+spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath)
+{
+	return (spa_vdev_set_common(spa, guid, newpath, B_TRUE));
+}
+
+int
+spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru)
+{
+	return (spa_vdev_set_common(spa, guid, newfru, B_FALSE));
+}
+
+/*
+ * ==========================================================================
+ * SPA Scanning
+ * ==========================================================================
+ */
+
+int
+spa_scan_stop(spa_t *spa)
+{
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
+	if (dsl_scan_resilvering(spa->spa_dsl_pool))
+		return (EBUSY);
+	return (dsl_scan_cancel(spa->spa_dsl_pool));
+}
+
+int
+spa_scan(spa_t *spa, pool_scan_func_t func)
+{
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
+
+	if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE)
+		return (ENOTSUP);
+
+	/*
+	 * If a resilver was requested, but there is no DTL on a
+	 * writeable leaf device, we have nothing to do.
+	 */
+	if (func == POOL_SCAN_RESILVER &&
+	    !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) {
+		spa_async_request(spa, SPA_ASYNC_RESILVER_DONE);
+		return (0);
+	}
+
+	return (dsl_scan(spa->spa_dsl_pool, func));
+}
+
+/*
+ * ==========================================================================
+ * SPA async task processing
+ * ==========================================================================
+ */
+
+static void
+spa_async_remove(spa_t *spa, vdev_t *vd)
+{
+	if (vd->vdev_remove_wanted) {
+		vd->vdev_remove_wanted = B_FALSE;
+		vd->vdev_delayed_close = B_FALSE;
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE);
+
+		/*
+		 * We want to clear the stats, but we don't want to do a full
+		 * vdev_clear() as that will cause us to throw away
+		 * degraded/faulted state as well as attempt to reopen the
+		 * device, all of which is a waste.
+		 */
+		vd->vdev_stat.vs_read_errors = 0;
+		vd->vdev_stat.vs_write_errors = 0;
+		vd->vdev_stat.vs_checksum_errors = 0;
+
+		vdev_state_dirty(vd->vdev_top);
+	}
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		spa_async_remove(spa, vd->vdev_child[c]);
+}
+
+static void
+spa_async_probe(spa_t *spa, vdev_t *vd)
+{
+	if (vd->vdev_probe_wanted) {
+		vd->vdev_probe_wanted = B_FALSE;
+		vdev_reopen(vd);	/* vdev_open() does the actual probe */
+	}
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		spa_async_probe(spa, vd->vdev_child[c]);
+}
+
+static void
+spa_async_autoexpand(spa_t *spa, vdev_t *vd)
+{
+	sysevent_id_t eid;
+	nvlist_t *attr;
+	char *physpath;
+
+	if (!spa->spa_autoexpand)
+		return;
+
+	for (int c = 0; c < vd->vdev_children; c++) {
+		vdev_t *cvd = vd->vdev_child[c];
+		spa_async_autoexpand(spa, cvd);
+	}
+
+	if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL)
+		return;
+
+	physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP);
+	(void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath);
+
+	VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0);
+
+	(void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS,
+	    ESC_DEV_DLE, attr, &eid, DDI_SLEEP);
+
+	nvlist_free(attr);
+	kmem_free(physpath, MAXPATHLEN);
+}
+
+static void
+spa_async_thread(spa_t *spa)
+{
+	int tasks;
+
+	ASSERT(spa->spa_sync_on);
+
+	mutex_enter(&spa->spa_async_lock);
+	tasks = spa->spa_async_tasks;
+	spa->spa_async_tasks = 0;
+	mutex_exit(&spa->spa_async_lock);
+
+	/*
+	 * See if the config needs to be updated.
+	 */
+	if (tasks & SPA_ASYNC_CONFIG_UPDATE) {
+		uint64_t old_space, new_space;
+
+		mutex_enter(&spa_namespace_lock);
+		old_space = metaslab_class_get_space(spa_normal_class(spa));
+		spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
+		new_space = metaslab_class_get_space(spa_normal_class(spa));
+		mutex_exit(&spa_namespace_lock);
+
+		/*
+		 * If the pool grew as a result of the config update,
+		 * then log an internal history event.
+		 */
+		if (new_space != old_space) {
+			spa_history_log_internal(LOG_POOL_VDEV_ONLINE,
+			    spa, NULL,
+			    "pool '%s' size: %llu(+%llu)",
+			    spa_name(spa), new_space, new_space - old_space);
+		}
+	}
+
+	/*
+	 * See if any devices need to be marked REMOVED.
+	 */
+	if (tasks & SPA_ASYNC_REMOVE) {
+		spa_vdev_state_enter(spa, SCL_NONE);
+		spa_async_remove(spa, spa->spa_root_vdev);
+		for (int i = 0; i < spa->spa_l2cache.sav_count; i++)
+			spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]);
+		for (int i = 0; i < spa->spa_spares.sav_count; i++)
+			spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]);
+		(void) spa_vdev_state_exit(spa, NULL, 0);
+	}
+
+	if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) {
+		spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
+		spa_async_autoexpand(spa, spa->spa_root_vdev);
+		spa_config_exit(spa, SCL_CONFIG, FTAG);
+	}
+
+	/*
+	 * See if any devices need to be probed.
+	 */
+	if (tasks & SPA_ASYNC_PROBE) {
+		spa_vdev_state_enter(spa, SCL_NONE);
+		spa_async_probe(spa, spa->spa_root_vdev);
+		(void) spa_vdev_state_exit(spa, NULL, 0);
+	}
+
+	/*
+	 * If any devices are done replacing, detach them.
+	 */
+	if (tasks & SPA_ASYNC_RESILVER_DONE)
+		spa_vdev_resilver_done(spa);
+
+	/*
+	 * Kick off a resilver.
+	 */
+	if (tasks & SPA_ASYNC_RESILVER)
+		dsl_resilver_restart(spa->spa_dsl_pool, 0);
+
+	/*
+	 * Let the world know that we're done.
+	 */
+	mutex_enter(&spa->spa_async_lock);
+	spa->spa_async_thread = NULL;
+	cv_broadcast(&spa->spa_async_cv);
+	mutex_exit(&spa->spa_async_lock);
+	thread_exit();
+}
+
+void
+spa_async_suspend(spa_t *spa)
+{
+	mutex_enter(&spa->spa_async_lock);
+	spa->spa_async_suspended++;
+	while (spa->spa_async_thread != NULL)
+		cv_wait(&spa->spa_async_cv, &spa->spa_async_lock);
+	mutex_exit(&spa->spa_async_lock);
+}
+
+void
+spa_async_resume(spa_t *spa)
+{
+	mutex_enter(&spa->spa_async_lock);
+	ASSERT(spa->spa_async_suspended != 0);
+	spa->spa_async_suspended--;
+	mutex_exit(&spa->spa_async_lock);
+}
+
+static void
+spa_async_dispatch(spa_t *spa)
+{
+	mutex_enter(&spa->spa_async_lock);
+	if (spa->spa_async_tasks && !spa->spa_async_suspended &&
+	    spa->spa_async_thread == NULL &&
+	    rootdir != NULL && !vn_is_readonly(rootdir))
+		spa->spa_async_thread = thread_create(NULL, 0,
+		    spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri);
+	mutex_exit(&spa->spa_async_lock);
+}
+
+void
+spa_async_request(spa_t *spa, int task)
+{
+	zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task);
+	mutex_enter(&spa->spa_async_lock);
+	spa->spa_async_tasks |= task;
+	mutex_exit(&spa->spa_async_lock);
+}
+
+/*
+ * ==========================================================================
+ * SPA syncing routines
+ * ==========================================================================
+ */
+
+static int
+bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
+{
+	bpobj_t *bpo = arg;
+	bpobj_enqueue(bpo, bp, tx);
+	return (0);
+}
+
+static int
+spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
+{
+	zio_t *zio = arg;
+
+	zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp,
+	    zio->io_flags));
+	return (0);
+}
+
+static void
+spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx)
+{
+	char *packed = NULL;
+	size_t bufsize;
+	size_t nvsize = 0;
+	dmu_buf_t *db;
+
+	VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0);
+
+	/*
+	 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
+	 * information.  This avoids the dbuf_will_dirty() path and
+	 * saves us a pre-read to get data we don't actually care about.
+	 */
+	bufsize = P2ROUNDUP(nvsize, SPA_CONFIG_BLOCKSIZE);
+	packed = kmem_alloc(bufsize, KM_SLEEP);
+
+	VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR,
+	    KM_SLEEP) == 0);
+	bzero(packed + nvsize, bufsize - nvsize);
+
+	dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx);
+
+	kmem_free(packed, bufsize);
+
+	VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db));
+	dmu_buf_will_dirty(db, tx);
+	*(uint64_t *)db->db_data = nvsize;
+	dmu_buf_rele(db, FTAG);
+}
+
+static void
+spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx,
+    const char *config, const char *entry)
+{
+	nvlist_t *nvroot;
+	nvlist_t **list;
+	int i;
+
+	if (!sav->sav_sync)
+		return;
+
+	/*
+	 * Update the MOS nvlist describing the list of available devices.
+	 * spa_validate_aux() will have already made sure this nvlist is
+	 * valid and the vdevs are labeled appropriately.
+	 */
+	if (sav->sav_object == 0) {
+		sav->sav_object = dmu_object_alloc(spa->spa_meta_objset,
+		    DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE,
+		    sizeof (uint64_t), tx);
+		VERIFY(zap_update(spa->spa_meta_objset,
+		    DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1,
+		    &sav->sav_object, tx) == 0);
+	}
+
+	VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	if (sav->sav_count == 0) {
+		VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0);
+	} else {
+		list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP);
+		for (i = 0; i < sav->sav_count; i++)
+			list[i] = vdev_config_generate(spa, sav->sav_vdevs[i],
+			    B_FALSE, VDEV_CONFIG_L2CACHE);
+		VERIFY(nvlist_add_nvlist_array(nvroot, config, list,
+		    sav->sav_count) == 0);
+		for (i = 0; i < sav->sav_count; i++)
+			nvlist_free(list[i]);
+		kmem_free(list, sav->sav_count * sizeof (void *));
+	}
+
+	spa_sync_nvlist(spa, sav->sav_object, nvroot, tx);
+	nvlist_free(nvroot);
+
+	sav->sav_sync = B_FALSE;
+}
+
+static void
+spa_sync_config_object(spa_t *spa, dmu_tx_t *tx)
+{
+	nvlist_t *config;
+
+	if (list_is_empty(&spa->spa_config_dirty_list))
+		return;
+
+	spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
+
+	config = spa_config_generate(spa, spa->spa_root_vdev,
+	    dmu_tx_get_txg(tx), B_FALSE);
+
+	spa_config_exit(spa, SCL_STATE, FTAG);
+
+	if (spa->spa_config_syncing)
+		nvlist_free(spa->spa_config_syncing);
+	spa->spa_config_syncing = config;
+
+	spa_sync_nvlist(spa, spa->spa_config_object, config, tx);
+}
+
+/*
+ * Set zpool properties.
+ */
+static void
+spa_sync_props(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	spa_t *spa = arg1;
+	objset_t *mos = spa->spa_meta_objset;
+	nvlist_t *nvp = arg2;
+	nvpair_t *elem;
+	uint64_t intval;
+	char *strval;
+	zpool_prop_t prop;
+	const char *propname;
+	zprop_type_t proptype;
+
+	mutex_enter(&spa->spa_props_lock);
+
+	elem = NULL;
+	while ((elem = nvlist_next_nvpair(nvp, elem))) {
+		switch (prop = zpool_name_to_prop(nvpair_name(elem))) {
+		case ZPOOL_PROP_VERSION:
+			/*
+			 * Only set version for non-zpool-creation cases
+			 * (set/import). spa_create() needs special care
+			 * for version setting.
+			 */
+			if (tx->tx_txg != TXG_INITIAL) {
+				VERIFY(nvpair_value_uint64(elem,
+				    &intval) == 0);
+				ASSERT(intval <= SPA_VERSION);
+				ASSERT(intval >= spa_version(spa));
+				spa->spa_uberblock.ub_version = intval;
+				vdev_config_dirty(spa->spa_root_vdev);
+			}
+			break;
+
+		case ZPOOL_PROP_ALTROOT:
+			/*
+			 * 'altroot' is a non-persistent property. It should
+			 * have been set temporarily at creation or import time.
+			 */
+			ASSERT(spa->spa_root != NULL);
+			break;
+
+		case ZPOOL_PROP_READONLY:
+		case ZPOOL_PROP_CACHEFILE:
+			/*
+			 * 'readonly' and 'cachefile' are also non-persisitent
+			 * properties.
+			 */
+			break;
+		default:
+			/*
+			 * Set pool property values in the poolprops mos object.
+			 */
+			if (spa->spa_pool_props_object == 0) {
+				VERIFY((spa->spa_pool_props_object =
+				    zap_create(mos, DMU_OT_POOL_PROPS,
+				    DMU_OT_NONE, 0, tx)) > 0);
+
+				VERIFY(zap_update(mos,
+				    DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS,
+				    8, 1, &spa->spa_pool_props_object, tx)
+				    == 0);
+			}
+
+			/* normalize the property name */
+			propname = zpool_prop_to_name(prop);
+			proptype = zpool_prop_get_type(prop);
+
+			if (nvpair_type(elem) == DATA_TYPE_STRING) {
+				ASSERT(proptype == PROP_TYPE_STRING);
+				VERIFY(nvpair_value_string(elem, &strval) == 0);
+				VERIFY(zap_update(mos,
+				    spa->spa_pool_props_object, propname,
+				    1, strlen(strval) + 1, strval, tx) == 0);
+
+			} else if (nvpair_type(elem) == DATA_TYPE_UINT64) {
+				VERIFY(nvpair_value_uint64(elem, &intval) == 0);
+
+				if (proptype == PROP_TYPE_INDEX) {
+					const char *unused;
+					VERIFY(zpool_prop_index_to_string(
+					    prop, intval, &unused) == 0);
+				}
+				VERIFY(zap_update(mos,
+				    spa->spa_pool_props_object, propname,
+				    8, 1, &intval, tx) == 0);
+			} else {
+				ASSERT(0); /* not allowed */
+			}
+
+			switch (prop) {
+			case ZPOOL_PROP_DELEGATION:
+				spa->spa_delegation = intval;
+				break;
+			case ZPOOL_PROP_BOOTFS:
+				spa->spa_bootfs = intval;
+				break;
+			case ZPOOL_PROP_FAILUREMODE:
+				spa->spa_failmode = intval;
+				break;
+			case ZPOOL_PROP_AUTOEXPAND:
+				spa->spa_autoexpand = intval;
+				if (tx->tx_txg != TXG_INITIAL)
+					spa_async_request(spa,
+					    SPA_ASYNC_AUTOEXPAND);
+				break;
+			case ZPOOL_PROP_DEDUPDITTO:
+				spa->spa_dedup_ditto = intval;
+				break;
+			default:
+				break;
+			}
+		}
+
+		/* log internal history if this is not a zpool create */
+		if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY &&
+		    tx->tx_txg != TXG_INITIAL) {
+			spa_history_log_internal(LOG_POOL_PROPSET,
+			    spa, tx, "%s %lld %s",
+			    nvpair_name(elem), intval, spa_name(spa));
+		}
+	}
+
+	mutex_exit(&spa->spa_props_lock);
+}
+
+/*
+ * Perform one-time upgrade on-disk changes.  spa_version() does not
+ * reflect the new version this txg, so there must be no changes this
+ * txg to anything that the upgrade code depends on after it executes.
+ * Therefore this must be called after dsl_pool_sync() does the sync
+ * tasks.
+ */
+static void
+spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx)
+{
+	dsl_pool_t *dp = spa->spa_dsl_pool;
+
+	ASSERT(spa->spa_sync_pass == 1);
+
+	if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN &&
+	    spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) {
+		dsl_pool_create_origin(dp, tx);
+
+		/* Keeping the origin open increases spa_minref */
+		spa->spa_minref += 3;
+	}
+
+	if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES &&
+	    spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) {
+		dsl_pool_upgrade_clones(dp, tx);
+	}
+
+	if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES &&
+	    spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) {
+		dsl_pool_upgrade_dir_clones(dp, tx);
+
+		/* Keeping the freedir open increases spa_minref */
+		spa->spa_minref += 3;
+	}
+}
+
+/*
+ * Sync the specified transaction group.  New blocks may be dirtied as
+ * part of the process, so we iterate until it converges.
+ */
+void
+spa_sync(spa_t *spa, uint64_t txg)
+{
+	dsl_pool_t *dp = spa->spa_dsl_pool;
+	objset_t *mos = spa->spa_meta_objset;
+	bpobj_t *defer_bpo = &spa->spa_deferred_bpobj;
+	bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK];
+	vdev_t *rvd = spa->spa_root_vdev;
+	vdev_t *vd;
+	dmu_tx_t *tx;
+	int error;
+
+	VERIFY(spa_writeable(spa));
+
+	/*
+	 * Lock out configuration changes.
+	 */
+	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
+
+	spa->spa_syncing_txg = txg;
+	spa->spa_sync_pass = 0;
+
+	/*
+	 * If there are any pending vdev state changes, convert them
+	 * into config changes that go out with this transaction group.
+	 */
+	spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
+	while (list_head(&spa->spa_state_dirty_list) != NULL) {
+		/*
+		 * We need the write lock here because, for aux vdevs,
+		 * calling vdev_config_dirty() modifies sav_config.
+		 * This is ugly and will become unnecessary when we
+		 * eliminate the aux vdev wart by integrating all vdevs
+		 * into the root vdev tree.
+		 */
+		spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
+		spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER);
+		while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) {
+			vdev_state_clean(vd);
+			vdev_config_dirty(vd);
+		}
+		spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
+		spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER);
+	}
+	spa_config_exit(spa, SCL_STATE, FTAG);
+
+	tx = dmu_tx_create_assigned(dp, txg);
+
+	/*
+	 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
+	 * set spa_deflate if we have no raid-z vdevs.
+	 */
+	if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE &&
+	    spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) {
+		int i;
+
+		for (i = 0; i < rvd->vdev_children; i++) {
+			vd = rvd->vdev_child[i];
+			if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE)
+				break;
+		}
+		if (i == rvd->vdev_children) {
+			spa->spa_deflate = TRUE;
+			VERIFY(0 == zap_add(spa->spa_meta_objset,
+			    DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
+			    sizeof (uint64_t), 1, &spa->spa_deflate, tx));
+		}
+	}
+
+	/*
+	 * If anything has changed in this txg, or if someone is waiting
+	 * for this txg to sync (eg, spa_vdev_remove()), push the
+	 * deferred frees from the previous txg.  If not, leave them
+	 * alone so that we don't generate work on an otherwise idle
+	 * system.
+	 */
+	if (!txg_list_empty(&dp->dp_dirty_datasets, txg) ||
+	    !txg_list_empty(&dp->dp_dirty_dirs, txg) ||
+	    !txg_list_empty(&dp->dp_sync_tasks, txg) ||
+	    ((dsl_scan_active(dp->dp_scan) ||
+	    txg_sync_waiting(dp)) && !spa_shutting_down(spa))) {
+		zio_t *zio = zio_root(spa, NULL, NULL, 0);
+		VERIFY3U(bpobj_iterate(defer_bpo,
+		    spa_free_sync_cb, zio, tx), ==, 0);
+		VERIFY3U(zio_wait(zio), ==, 0);
+	}
+
+	/*
+	 * Iterate to convergence.
+	 */
+	do {
+		int pass = ++spa->spa_sync_pass;
+
+		spa_sync_config_object(spa, tx);
+		spa_sync_aux_dev(spa, &spa->spa_spares, tx,
+		    ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES);
+		spa_sync_aux_dev(spa, &spa->spa_l2cache, tx,
+		    ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE);
+		spa_errlog_sync(spa, txg);
+		dsl_pool_sync(dp, txg);
+
+		if (pass <= SYNC_PASS_DEFERRED_FREE) {
+			zio_t *zio = zio_root(spa, NULL, NULL, 0);
+			bplist_iterate(free_bpl, spa_free_sync_cb,
+			    zio, tx);
+			VERIFY(zio_wait(zio) == 0);
+		} else {
+			bplist_iterate(free_bpl, bpobj_enqueue_cb,
+			    defer_bpo, tx);
+		}
+
+		ddt_sync(spa, txg);
+		dsl_scan_sync(dp, tx);
+
+		while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg))
+			vdev_sync(vd, txg);
+
+		if (pass == 1)
+			spa_sync_upgrades(spa, tx);
+
+	} while (dmu_objset_is_dirty(mos, txg));
+
+	/*
+	 * Rewrite the vdev configuration (which includes the uberblock)
+	 * to commit the transaction group.
+	 *
+	 * If there are no dirty vdevs, we sync the uberblock to a few
+	 * random top-level vdevs that are known to be visible in the
+	 * config cache (see spa_vdev_add() for a complete description).
+	 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
+	 */
+	for (;;) {
+		/*
+		 * We hold SCL_STATE to prevent vdev open/close/etc.
+		 * while we're attempting to write the vdev labels.
+		 */
+		spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
+
+		if (list_is_empty(&spa->spa_config_dirty_list)) {
+			vdev_t *svd[SPA_DVAS_PER_BP];
+			int svdcount = 0;
+			int children = rvd->vdev_children;
+			int c0 = spa_get_random(children);
+
+			for (int c = 0; c < children; c++) {
+				vd = rvd->vdev_child[(c0 + c) % children];
+				if (vd->vdev_ms_array == 0 || vd->vdev_islog)
+					continue;
+				svd[svdcount++] = vd;
+				if (svdcount == SPA_DVAS_PER_BP)
+					break;
+			}
+			error = vdev_config_sync(svd, svdcount, txg, B_FALSE);
+			if (error != 0)
+				error = vdev_config_sync(svd, svdcount, txg,
+				    B_TRUE);
+		} else {
+			error = vdev_config_sync(rvd->vdev_child,
+			    rvd->vdev_children, txg, B_FALSE);
+			if (error != 0)
+				error = vdev_config_sync(rvd->vdev_child,
+				    rvd->vdev_children, txg, B_TRUE);
+		}
+
+		spa_config_exit(spa, SCL_STATE, FTAG);
+
+		if (error == 0)
+			break;
+		zio_suspend(spa, NULL);
+		zio_resume_wait(spa);
+	}
+	dmu_tx_commit(tx);
+
+	/*
+	 * Clear the dirty config list.
+	 */
+	while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL)
+		vdev_config_clean(vd);
+
+	/*
+	 * Now that the new config has synced transactionally,
+	 * let it become visible to the config cache.
+	 */
+	if (spa->spa_config_syncing != NULL) {
+		spa_config_set(spa, spa->spa_config_syncing);
+		spa->spa_config_txg = txg;
+		spa->spa_config_syncing = NULL;
+	}
+
+	spa->spa_ubsync = spa->spa_uberblock;
+
+	dsl_pool_sync_done(dp, txg);
+
+	/*
+	 * Update usable space statistics.
+	 */
+	while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg)))
+		vdev_sync_done(vd, txg);
+
+	spa_update_dspace(spa);
+
+	/*
+	 * It had better be the case that we didn't dirty anything
+	 * since vdev_config_sync().
+	 */
+	ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg));
+	ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg));
+	ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg));
+
+	spa->spa_sync_pass = 0;
+
+	spa_config_exit(spa, SCL_CONFIG, FTAG);
+
+	spa_handle_ignored_writes(spa);
+
+	/*
+	 * If any async tasks have been requested, kick them off.
+	 */
+	spa_async_dispatch(spa);
+}
+
+/*
+ * Sync all pools.  We don't want to hold the namespace lock across these
+ * operations, so we take a reference on the spa_t and drop the lock during the
+ * sync.
+ */
+void
+spa_sync_allpools(void)
+{
+	spa_t *spa = NULL;
+	mutex_enter(&spa_namespace_lock);
+	while ((spa = spa_next(spa)) != NULL) {
+		if (spa_state(spa) != POOL_STATE_ACTIVE ||
+		    !spa_writeable(spa) || spa_suspended(spa))
+			continue;
+		spa_open_ref(spa, FTAG);
+		mutex_exit(&spa_namespace_lock);
+		txg_wait_synced(spa_get_dsl(spa), 0);
+		mutex_enter(&spa_namespace_lock);
+		spa_close(spa, FTAG);
+	}
+	mutex_exit(&spa_namespace_lock);
+}
+
+/*
+ * ==========================================================================
+ * Miscellaneous routines
+ * ==========================================================================
+ */
+
+/*
+ * Remove all pools in the system.
+ */
+void
+spa_evict_all(void)
+{
+	spa_t *spa;
+
+	/*
+	 * Remove all cached state.  All pools should be closed now,
+	 * so every spa in the AVL tree should be unreferenced.
+	 */
+	mutex_enter(&spa_namespace_lock);
+	while ((spa = spa_next(NULL)) != NULL) {
+		/*
+		 * Stop async tasks.  The async thread may need to detach
+		 * a device that's been replaced, which requires grabbing
+		 * spa_namespace_lock, so we must drop it here.
+		 */
+		spa_open_ref(spa, FTAG);
+		mutex_exit(&spa_namespace_lock);
+		spa_async_suspend(spa);
+		mutex_enter(&spa_namespace_lock);
+		spa_close(spa, FTAG);
+
+		if (spa->spa_state != POOL_STATE_UNINITIALIZED) {
+			spa_unload(spa);
+			spa_deactivate(spa);
+		}
+		spa_remove(spa);
+	}
+	mutex_exit(&spa_namespace_lock);
+}
+
+vdev_t *
+spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux)
+{
+	vdev_t *vd;
+	int i;
+
+	if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL)
+		return (vd);
+
+	if (aux) {
+		for (i = 0; i < spa->spa_l2cache.sav_count; i++) {
+			vd = spa->spa_l2cache.sav_vdevs[i];
+			if (vd->vdev_guid == guid)
+				return (vd);
+		}
+
+		for (i = 0; i < spa->spa_spares.sav_count; i++) {
+			vd = spa->spa_spares.sav_vdevs[i];
+			if (vd->vdev_guid == guid)
+				return (vd);
+		}
+	}
+
+	return (NULL);
+}
+
+void
+spa_upgrade(spa_t *spa, uint64_t version)
+{
+	ASSERT(spa_writeable(spa));
+
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+
+	/*
+	 * This should only be called for a non-faulted pool, and since a
+	 * future version would result in an unopenable pool, this shouldn't be
+	 * possible.
+	 */
+	ASSERT(spa->spa_uberblock.ub_version <= SPA_VERSION);
+	ASSERT(version >= spa->spa_uberblock.ub_version);
+
+	spa->spa_uberblock.ub_version = version;
+	vdev_config_dirty(spa->spa_root_vdev);
+
+	spa_config_exit(spa, SCL_ALL, FTAG);
+
+	txg_wait_synced(spa_get_dsl(spa), 0);
+}
+
+boolean_t
+spa_has_spare(spa_t *spa, uint64_t guid)
+{
+	int i;
+	uint64_t spareguid;
+	spa_aux_vdev_t *sav = &spa->spa_spares;
+
+	for (i = 0; i < sav->sav_count; i++)
+		if (sav->sav_vdevs[i]->vdev_guid == guid)
+			return (B_TRUE);
+
+	for (i = 0; i < sav->sav_npending; i++) {
+		if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID,
+		    &spareguid) == 0 && spareguid == guid)
+			return (B_TRUE);
+	}
+
+	return (B_FALSE);
+}
+
+/*
+ * Check if a pool has an active shared spare device.
+ * Note: reference count of an active spare is 2, as a spare and as a replace
+ */
+static boolean_t
+spa_has_active_shared_spare(spa_t *spa)
+{
+	int i, refcnt;
+	uint64_t pool;
+	spa_aux_vdev_t *sav = &spa->spa_spares;
+
+	for (i = 0; i < sav->sav_count; i++) {
+		if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool,
+		    &refcnt) && pool != 0ULL && pool == spa_guid(spa) &&
+		    refcnt > 2)
+			return (B_TRUE);
+	}
+
+	return (B_FALSE);
+}
+
+/*
+ * Post a sysevent corresponding to the given event.  The 'name' must be one of
+ * the event definitions in sys/sysevent/eventdefs.h.  The payload will be
+ * filled in from the spa and (optionally) the vdev.  This doesn't do anything
+ * in the userland libzpool, as we don't want consumers to misinterpret ztest
+ * or zdb as real changes.
+ */
+void
+spa_event_notify(spa_t *spa, vdev_t *vd, const char *name)
+{
+#ifdef _KERNEL
+	sysevent_t		*ev;
+	sysevent_attr_list_t	*attr = NULL;
+	sysevent_value_t	value;
+	sysevent_id_t		eid;
+
+	ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs",
+	    SE_SLEEP);
+
+	value.value_type = SE_DATA_TYPE_STRING;
+	value.value.sv_string = spa_name(spa);
+	if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0)
+		goto done;
+
+	value.value_type = SE_DATA_TYPE_UINT64;
+	value.value.sv_uint64 = spa_guid(spa);
+	if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0)
+		goto done;
+
+	if (vd) {
+		value.value_type = SE_DATA_TYPE_UINT64;
+		value.value.sv_uint64 = vd->vdev_guid;
+		if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value,
+		    SE_SLEEP) != 0)
+			goto done;
+
+		if (vd->vdev_path) {
+			value.value_type = SE_DATA_TYPE_STRING;
+			value.value.sv_string = vd->vdev_path;
+			if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH,
+			    &value, SE_SLEEP) != 0)
+				goto done;
+		}
+	}
+
+	if (sysevent_attach_attributes(ev, attr) != 0)
+		goto done;
+	attr = NULL;
+
+	(void) log_sysevent(ev, SE_SLEEP, &eid);
+
+done:
+	if (attr)
+		sysevent_free_attr(attr);
+	sysevent_free(ev);
+#endif
+}
diff --git a/uts/common/fs/zfs/spa_config.c b/uts/common/fs/zfs/spa_config.c
new file mode 100644
index 000000000000..69d57f66dbb6
--- /dev/null
+++ b/uts/common/fs/zfs/spa_config.c
@@ -0,0 +1,487 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/spa.h>
+#include <sys/spa_impl.h>
+#include <sys/nvpair.h>
+#include <sys/uio.h>
+#include <sys/fs/zfs.h>
+#include <sys/vdev_impl.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/utsname.h>
+#include <sys/systeminfo.h>
+#include <sys/sunddi.h>
+#ifdef _KERNEL
+#include <sys/kobj.h>
+#include <sys/zone.h>
+#endif
+
+/*
+ * Pool configuration repository.
+ *
+ * Pool configuration is stored as a packed nvlist on the filesystem.  By
+ * default, all pools are stored in /etc/zfs/zpool.cache and loaded on boot
+ * (when the ZFS module is loaded).  Pools can also have the 'cachefile'
+ * property set that allows them to be stored in an alternate location until
+ * the control of external software.
+ *
+ * For each cache file, we have a single nvlist which holds all the
+ * configuration information.  When the module loads, we read this information
+ * from /etc/zfs/zpool.cache and populate the SPA namespace.  This namespace is
+ * maintained independently in spa.c.  Whenever the namespace is modified, or
+ * the configuration of a pool is changed, we call spa_config_sync(), which
+ * walks through all the active pools and writes the configuration to disk.
+ */
+
+static uint64_t spa_config_generation = 1;
+
+/*
+ * This can be overridden in userland to preserve an alternate namespace for
+ * userland pools when doing testing.
+ */
+const char *spa_config_path = ZPOOL_CACHE;
+
+/*
+ * Called when the module is first loaded, this routine loads the configuration
+ * file into the SPA namespace.  It does not actually open or load the pools; it
+ * only populates the namespace.
+ */
+void
+spa_config_load(void)
+{
+	void *buf = NULL;
+	nvlist_t *nvlist, *child;
+	nvpair_t *nvpair;
+	char *pathname;
+	struct _buf *file;
+	uint64_t fsize;
+
+	/*
+	 * Open the configuration file.
+	 */
+	pathname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
+
+	(void) snprintf(pathname, MAXPATHLEN, "%s%s",
+	    (rootdir != NULL) ? "./" : "", spa_config_path);
+
+	file = kobj_open_file(pathname);
+
+	kmem_free(pathname, MAXPATHLEN);
+
+	if (file == (struct _buf *)-1)
+		return;
+
+	if (kobj_get_filesize(file, &fsize) != 0)
+		goto out;
+
+	buf = kmem_alloc(fsize, KM_SLEEP);
+
+	/*
+	 * Read the nvlist from the file.
+	 */
+	if (kobj_read_file(file, buf, fsize, 0) < 0)
+		goto out;
+
+	/*
+	 * Unpack the nvlist.
+	 */
+	if (nvlist_unpack(buf, fsize, &nvlist, KM_SLEEP) != 0)
+		goto out;
+
+	/*
+	 * Iterate over all elements in the nvlist, creating a new spa_t for
+	 * each one with the specified configuration.
+	 */
+	mutex_enter(&spa_namespace_lock);
+	nvpair = NULL;
+	while ((nvpair = nvlist_next_nvpair(nvlist, nvpair)) != NULL) {
+		if (nvpair_type(nvpair) != DATA_TYPE_NVLIST)
+			continue;
+
+		VERIFY(nvpair_value_nvlist(nvpair, &child) == 0);
+
+		if (spa_lookup(nvpair_name(nvpair)) != NULL)
+			continue;
+		(void) spa_add(nvpair_name(nvpair), child, NULL);
+	}
+	mutex_exit(&spa_namespace_lock);
+
+	nvlist_free(nvlist);
+
+out:
+	if (buf != NULL)
+		kmem_free(buf, fsize);
+
+	kobj_close_file(file);
+}
+
+static void
+spa_config_write(spa_config_dirent_t *dp, nvlist_t *nvl)
+{
+	size_t buflen;
+	char *buf;
+	vnode_t *vp;
+	int oflags = FWRITE | FTRUNC | FCREAT | FOFFMAX;
+	char *temp;
+
+	/*
+	 * If the nvlist is empty (NULL), then remove the old cachefile.
+	 */
+	if (nvl == NULL) {
+		(void) vn_remove(dp->scd_path, UIO_SYSSPACE, RMFILE);
+		return;
+	}
+
+	/*
+	 * Pack the configuration into a buffer.
+	 */
+	VERIFY(nvlist_size(nvl, &buflen, NV_ENCODE_XDR) == 0);
+
+	buf = kmem_alloc(buflen, KM_SLEEP);
+	temp = kmem_zalloc(MAXPATHLEN, KM_SLEEP);
+
+	VERIFY(nvlist_pack(nvl, &buf, &buflen, NV_ENCODE_XDR,
+	    KM_SLEEP) == 0);
+
+	/*
+	 * Write the configuration to disk.  We need to do the traditional
+	 * 'write to temporary file, sync, move over original' to make sure we
+	 * always have a consistent view of the data.
+	 */
+	(void) snprintf(temp, MAXPATHLEN, "%s.tmp", dp->scd_path);
+
+	if (vn_open(temp, UIO_SYSSPACE, oflags, 0644, &vp, CRCREAT, 0) == 0) {
+		if (vn_rdwr(UIO_WRITE, vp, buf, buflen, 0, UIO_SYSSPACE,
+		    0, RLIM64_INFINITY, kcred, NULL) == 0 &&
+		    VOP_FSYNC(vp, FSYNC, kcred, NULL) == 0) {
+			(void) vn_rename(temp, dp->scd_path, UIO_SYSSPACE);
+		}
+		(void) VOP_CLOSE(vp, oflags, 1, 0, kcred, NULL);
+		VN_RELE(vp);
+	}
+
+	(void) vn_remove(temp, UIO_SYSSPACE, RMFILE);
+
+	kmem_free(buf, buflen);
+	kmem_free(temp, MAXPATHLEN);
+}
+
+/*
+ * Synchronize pool configuration to disk.  This must be called with the
+ * namespace lock held.
+ */
+void
+spa_config_sync(spa_t *target, boolean_t removing, boolean_t postsysevent)
+{
+	spa_config_dirent_t *dp, *tdp;
+	nvlist_t *nvl;
+
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+
+	if (rootdir == NULL || !(spa_mode_global & FWRITE))
+		return;
+
+	/*
+	 * Iterate over all cachefiles for the pool, past or present.  When the
+	 * cachefile is changed, the new one is pushed onto this list, allowing
+	 * us to update previous cachefiles that no longer contain this pool.
+	 */
+	for (dp = list_head(&target->spa_config_list); dp != NULL;
+	    dp = list_next(&target->spa_config_list, dp)) {
+		spa_t *spa = NULL;
+		if (dp->scd_path == NULL)
+			continue;
+
+		/*
+		 * Iterate over all pools, adding any matching pools to 'nvl'.
+		 */
+		nvl = NULL;
+		while ((spa = spa_next(spa)) != NULL) {
+			if (spa == target && removing)
+				continue;
+
+			mutex_enter(&spa->spa_props_lock);
+			tdp = list_head(&spa->spa_config_list);
+			if (spa->spa_config == NULL ||
+			    tdp->scd_path == NULL ||
+			    strcmp(tdp->scd_path, dp->scd_path) != 0) {
+				mutex_exit(&spa->spa_props_lock);
+				continue;
+			}
+
+			if (nvl == NULL)
+				VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME,
+				    KM_SLEEP) == 0);
+
+			VERIFY(nvlist_add_nvlist(nvl, spa->spa_name,
+			    spa->spa_config) == 0);
+			mutex_exit(&spa->spa_props_lock);
+		}
+
+		spa_config_write(dp, nvl);
+		nvlist_free(nvl);
+	}
+
+	/*
+	 * Remove any config entries older than the current one.
+	 */
+	dp = list_head(&target->spa_config_list);
+	while ((tdp = list_next(&target->spa_config_list, dp)) != NULL) {
+		list_remove(&target->spa_config_list, tdp);
+		if (tdp->scd_path != NULL)
+			spa_strfree(tdp->scd_path);
+		kmem_free(tdp, sizeof (spa_config_dirent_t));
+	}
+
+	spa_config_generation++;
+
+	if (postsysevent)
+		spa_event_notify(target, NULL, ESC_ZFS_CONFIG_SYNC);
+}
+
+/*
+ * Sigh.  Inside a local zone, we don't have access to /etc/zfs/zpool.cache,
+ * and we don't want to allow the local zone to see all the pools anyway.
+ * So we have to invent the ZFS_IOC_CONFIG ioctl to grab the configuration
+ * information for all pool visible within the zone.
+ */
+nvlist_t *
+spa_all_configs(uint64_t *generation)
+{
+	nvlist_t *pools;
+	spa_t *spa = NULL;
+
+	if (*generation == spa_config_generation)
+		return (NULL);
+
+	VERIFY(nvlist_alloc(&pools, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	mutex_enter(&spa_namespace_lock);
+	while ((spa = spa_next(spa)) != NULL) {
+		if (INGLOBALZONE(curproc) ||
+		    zone_dataset_visible(spa_name(spa), NULL)) {
+			mutex_enter(&spa->spa_props_lock);
+			VERIFY(nvlist_add_nvlist(pools, spa_name(spa),
+			    spa->spa_config) == 0);
+			mutex_exit(&spa->spa_props_lock);
+		}
+	}
+	*generation = spa_config_generation;
+	mutex_exit(&spa_namespace_lock);
+
+	return (pools);
+}
+
+void
+spa_config_set(spa_t *spa, nvlist_t *config)
+{
+	mutex_enter(&spa->spa_props_lock);
+	if (spa->spa_config != NULL)
+		nvlist_free(spa->spa_config);
+	spa->spa_config = config;
+	mutex_exit(&spa->spa_props_lock);
+}
+
+/*
+ * Generate the pool's configuration based on the current in-core state.
+ * We infer whether to generate a complete config or just one top-level config
+ * based on whether vd is the root vdev.
+ */
+nvlist_t *
+spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, int getstats)
+{
+	nvlist_t *config, *nvroot;
+	vdev_t *rvd = spa->spa_root_vdev;
+	unsigned long hostid = 0;
+	boolean_t locked = B_FALSE;
+	uint64_t split_guid;
+
+	if (vd == NULL) {
+		vd = rvd;
+		locked = B_TRUE;
+		spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER);
+	}
+
+	ASSERT(spa_config_held(spa, SCL_CONFIG | SCL_STATE, RW_READER) ==
+	    (SCL_CONFIG | SCL_STATE));
+
+	/*
+	 * If txg is -1, report the current value of spa->spa_config_txg.
+	 */
+	if (txg == -1ULL)
+		txg = spa->spa_config_txg;
+
+	VERIFY(nvlist_alloc(&config, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION,
+	    spa_version(spa)) == 0);
+	VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME,
+	    spa_name(spa)) == 0);
+	VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
+	    spa_state(spa)) == 0);
+	VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG,
+	    txg) == 0);
+	VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID,
+	    spa_guid(spa)) == 0);
+#ifdef	_KERNEL
+	hostid = zone_get_hostid(NULL);
+#else	/* _KERNEL */
+	/*
+	 * We're emulating the system's hostid in userland, so we can't use
+	 * zone_get_hostid().
+	 */
+	(void) ddi_strtoul(hw_serial, NULL, 10, &hostid);
+#endif	/* _KERNEL */
+	if (hostid != 0) {
+		VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID,
+		    hostid) == 0);
+	}
+	VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_HOSTNAME,
+	    utsname.nodename) == 0);
+
+	if (vd != rvd) {
+		VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TOP_GUID,
+		    vd->vdev_top->vdev_guid) == 0);
+		VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_GUID,
+		    vd->vdev_guid) == 0);
+		if (vd->vdev_isspare)
+			VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_IS_SPARE,
+			    1ULL) == 0);
+		if (vd->vdev_islog)
+			VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_IS_LOG,
+			    1ULL) == 0);
+		vd = vd->vdev_top;		/* label contains top config */
+	} else {
+		/*
+		 * Only add the (potentially large) split information
+		 * in the mos config, and not in the vdev labels
+		 */
+		if (spa->spa_config_splitting != NULL)
+			VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_SPLIT,
+			    spa->spa_config_splitting) == 0);
+	}
+
+	/*
+	 * Add the top-level config.  We even add this on pools which
+	 * don't support holes in the namespace.
+	 */
+	vdev_top_config_generate(spa, config);
+
+	/*
+	 * If we're splitting, record the original pool's guid.
+	 */
+	if (spa->spa_config_splitting != NULL &&
+	    nvlist_lookup_uint64(spa->spa_config_splitting,
+	    ZPOOL_CONFIG_SPLIT_GUID, &split_guid) == 0) {
+		VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_SPLIT_GUID,
+		    split_guid) == 0);
+	}
+
+	nvroot = vdev_config_generate(spa, vd, getstats, 0);
+	VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0);
+	nvlist_free(nvroot);
+
+	if (getstats && spa_load_state(spa) == SPA_LOAD_NONE) {
+		ddt_histogram_t *ddh;
+		ddt_stat_t *dds;
+		ddt_object_t *ddo;
+
+		ddh = kmem_zalloc(sizeof (ddt_histogram_t), KM_SLEEP);
+		ddt_get_dedup_histogram(spa, ddh);
+		VERIFY(nvlist_add_uint64_array(config,
+		    ZPOOL_CONFIG_DDT_HISTOGRAM,
+		    (uint64_t *)ddh, sizeof (*ddh) / sizeof (uint64_t)) == 0);
+		kmem_free(ddh, sizeof (ddt_histogram_t));
+
+		ddo = kmem_zalloc(sizeof (ddt_object_t), KM_SLEEP);
+		ddt_get_dedup_object_stats(spa, ddo);
+		VERIFY(nvlist_add_uint64_array(config,
+		    ZPOOL_CONFIG_DDT_OBJ_STATS,
+		    (uint64_t *)ddo, sizeof (*ddo) / sizeof (uint64_t)) == 0);
+		kmem_free(ddo, sizeof (ddt_object_t));
+
+		dds = kmem_zalloc(sizeof (ddt_stat_t), KM_SLEEP);
+		ddt_get_dedup_stats(spa, dds);
+		VERIFY(nvlist_add_uint64_array(config,
+		    ZPOOL_CONFIG_DDT_STATS,
+		    (uint64_t *)dds, sizeof (*dds) / sizeof (uint64_t)) == 0);
+		kmem_free(dds, sizeof (ddt_stat_t));
+	}
+
+	if (locked)
+		spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
+
+	return (config);
+}
+
+/*
+ * Update all disk labels, generate a fresh config based on the current
+ * in-core state, and sync the global config cache (do not sync the config
+ * cache if this is a booting rootpool).
+ */
+void
+spa_config_update(spa_t *spa, int what)
+{
+	vdev_t *rvd = spa->spa_root_vdev;
+	uint64_t txg;
+	int c;
+
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+	txg = spa_last_synced_txg(spa) + 1;
+	if (what == SPA_CONFIG_UPDATE_POOL) {
+		vdev_config_dirty(rvd);
+	} else {
+		/*
+		 * If we have top-level vdevs that were added but have
+		 * not yet been prepared for allocation, do that now.
+		 * (It's safe now because the config cache is up to date,
+		 * so it will be able to translate the new DVAs.)
+		 * See comments in spa_vdev_add() for full details.
+		 */
+		for (c = 0; c < rvd->vdev_children; c++) {
+			vdev_t *tvd = rvd->vdev_child[c];
+			if (tvd->vdev_ms_array == 0)
+				vdev_metaslab_set_size(tvd);
+			vdev_expand(tvd, txg);
+		}
+	}
+	spa_config_exit(spa, SCL_ALL, FTAG);
+
+	/*
+	 * Wait for the mosconfig to be regenerated and synced.
+	 */
+	txg_wait_synced(spa->spa_dsl_pool, txg);
+
+	/*
+	 * Update the global config cache to reflect the new mosconfig.
+	 */
+	if (!spa->spa_is_root)
+		spa_config_sync(spa, B_FALSE, what != SPA_CONFIG_UPDATE_POOL);
+
+	if (what == SPA_CONFIG_UPDATE_POOL)
+		spa_config_update(spa, SPA_CONFIG_UPDATE_VDEVS);
+}
diff --git a/uts/common/fs/zfs/spa_errlog.c b/uts/common/fs/zfs/spa_errlog.c
new file mode 100644
index 000000000000..282140b3bd65
--- /dev/null
+++ b/uts/common/fs/zfs/spa_errlog.c
@@ -0,0 +1,403 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * Routines to manage the on-disk persistent error log.
+ *
+ * Each pool stores a log of all logical data errors seen during normal
+ * operation.  This is actually the union of two distinct logs: the last log,
+ * and the current log.  All errors seen are logged to the current log.  When a
+ * scrub completes, the current log becomes the last log, the last log is thrown
+ * out, and the current log is reinitialized.  This way, if an error is somehow
+ * corrected, a new scrub will show that that it no longer exists, and will be
+ * deleted from the log when the scrub completes.
+ *
+ * The log is stored using a ZAP object whose key is a string form of the
+ * zbookmark tuple (objset, object, level, blkid), and whose contents is an
+ * optional 'objset:object' human-readable string describing the data.  When an
+ * error is first logged, this string will be empty, indicating that no name is
+ * known.  This prevents us from having to issue a potentially large amount of
+ * I/O to discover the object name during an error path.  Instead, we do the
+ * calculation when the data is requested, storing the result so future queries
+ * will be faster.
+ *
+ * This log is then shipped into an nvlist where the key is the dataset name and
+ * the value is the object name.  Userland is then responsible for uniquifying
+ * this list and displaying it to the user.
+ */
+
+#include <sys/dmu_tx.h>
+#include <sys/spa.h>
+#include <sys/spa_impl.h>
+#include <sys/zap.h>
+#include <sys/zio.h>
+
+
+/*
+ * Convert a bookmark to a string.
+ */
+static void
+bookmark_to_name(zbookmark_t *zb, char *buf, size_t len)
+{
+	(void) snprintf(buf, len, "%llx:%llx:%llx:%llx",
+	    (u_longlong_t)zb->zb_objset, (u_longlong_t)zb->zb_object,
+	    (u_longlong_t)zb->zb_level, (u_longlong_t)zb->zb_blkid);
+}
+
+/*
+ * Convert a string to a bookmark
+ */
+#ifdef _KERNEL
+static void
+name_to_bookmark(char *buf, zbookmark_t *zb)
+{
+	zb->zb_objset = strtonum(buf, &buf);
+	ASSERT(*buf == ':');
+	zb->zb_object = strtonum(buf + 1, &buf);
+	ASSERT(*buf == ':');
+	zb->zb_level = (int)strtonum(buf + 1, &buf);
+	ASSERT(*buf == ':');
+	zb->zb_blkid = strtonum(buf + 1, &buf);
+	ASSERT(*buf == '\0');
+}
+#endif
+
+/*
+ * Log an uncorrectable error to the persistent error log.  We add it to the
+ * spa's list of pending errors.  The changes are actually synced out to disk
+ * during spa_errlog_sync().
+ */
+void
+spa_log_error(spa_t *spa, zio_t *zio)
+{
+	zbookmark_t *zb = &zio->io_logical->io_bookmark;
+	spa_error_entry_t search;
+	spa_error_entry_t *new;
+	avl_tree_t *tree;
+	avl_index_t where;
+
+	/*
+	 * If we are trying to import a pool, ignore any errors, as we won't be
+	 * writing to the pool any time soon.
+	 */
+	if (spa_load_state(spa) == SPA_LOAD_TRYIMPORT)
+		return;
+
+	mutex_enter(&spa->spa_errlist_lock);
+
+	/*
+	 * If we have had a request to rotate the log, log it to the next list
+	 * instead of the current one.
+	 */
+	if (spa->spa_scrub_active || spa->spa_scrub_finished)
+		tree = &spa->spa_errlist_scrub;
+	else
+		tree = &spa->spa_errlist_last;
+
+	search.se_bookmark = *zb;
+	if (avl_find(tree, &search, &where) != NULL) {
+		mutex_exit(&spa->spa_errlist_lock);
+		return;
+	}
+
+	new = kmem_zalloc(sizeof (spa_error_entry_t), KM_SLEEP);
+	new->se_bookmark = *zb;
+	avl_insert(tree, new, where);
+
+	mutex_exit(&spa->spa_errlist_lock);
+}
+
+/*
+ * Return the number of errors currently in the error log.  This is actually the
+ * sum of both the last log and the current log, since we don't know the union
+ * of these logs until we reach userland.
+ */
+uint64_t
+spa_get_errlog_size(spa_t *spa)
+{
+	uint64_t total = 0, count;
+
+	mutex_enter(&spa->spa_errlog_lock);
+	if (spa->spa_errlog_scrub != 0 &&
+	    zap_count(spa->spa_meta_objset, spa->spa_errlog_scrub,
+	    &count) == 0)
+		total += count;
+
+	if (spa->spa_errlog_last != 0 && !spa->spa_scrub_finished &&
+	    zap_count(spa->spa_meta_objset, spa->spa_errlog_last,
+	    &count) == 0)
+		total += count;
+	mutex_exit(&spa->spa_errlog_lock);
+
+	mutex_enter(&spa->spa_errlist_lock);
+	total += avl_numnodes(&spa->spa_errlist_last);
+	total += avl_numnodes(&spa->spa_errlist_scrub);
+	mutex_exit(&spa->spa_errlist_lock);
+
+	return (total);
+}
+
+#ifdef _KERNEL
+static int
+process_error_log(spa_t *spa, uint64_t obj, void *addr, size_t *count)
+{
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	zbookmark_t zb;
+
+	if (obj == 0)
+		return (0);
+
+	for (zap_cursor_init(&zc, spa->spa_meta_objset, obj);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    zap_cursor_advance(&zc)) {
+
+		if (*count == 0) {
+			zap_cursor_fini(&zc);
+			return (ENOMEM);
+		}
+
+		name_to_bookmark(za.za_name, &zb);
+
+		if (copyout(&zb, (char *)addr +
+		    (*count - 1) * sizeof (zbookmark_t),
+		    sizeof (zbookmark_t)) != 0)
+			return (EFAULT);
+
+		*count -= 1;
+	}
+
+	zap_cursor_fini(&zc);
+
+	return (0);
+}
+
+static int
+process_error_list(avl_tree_t *list, void *addr, size_t *count)
+{
+	spa_error_entry_t *se;
+
+	for (se = avl_first(list); se != NULL; se = AVL_NEXT(list, se)) {
+
+		if (*count == 0)
+			return (ENOMEM);
+
+		if (copyout(&se->se_bookmark, (char *)addr +
+		    (*count - 1) * sizeof (zbookmark_t),
+		    sizeof (zbookmark_t)) != 0)
+			return (EFAULT);
+
+		*count -= 1;
+	}
+
+	return (0);
+}
+#endif
+
+/*
+ * Copy all known errors to userland as an array of bookmarks.  This is
+ * actually a union of the on-disk last log and current log, as well as any
+ * pending error requests.
+ *
+ * Because the act of reading the on-disk log could cause errors to be
+ * generated, we have two separate locks: one for the error log and one for the
+ * in-core error lists.  We only need the error list lock to log and error, so
+ * we grab the error log lock while we read the on-disk logs, and only pick up
+ * the error list lock when we are finished.
+ */
+int
+spa_get_errlog(spa_t *spa, void *uaddr, size_t *count)
+{
+	int ret = 0;
+
+#ifdef _KERNEL
+	mutex_enter(&spa->spa_errlog_lock);
+
+	ret = process_error_log(spa, spa->spa_errlog_scrub, uaddr, count);
+
+	if (!ret && !spa->spa_scrub_finished)
+		ret = process_error_log(spa, spa->spa_errlog_last, uaddr,
+		    count);
+
+	mutex_enter(&spa->spa_errlist_lock);
+	if (!ret)
+		ret = process_error_list(&spa->spa_errlist_scrub, uaddr,
+		    count);
+	if (!ret)
+		ret = process_error_list(&spa->spa_errlist_last, uaddr,
+		    count);
+	mutex_exit(&spa->spa_errlist_lock);
+
+	mutex_exit(&spa->spa_errlog_lock);
+#endif
+
+	return (ret);
+}
+
+/*
+ * Called when a scrub completes.  This simply set a bit which tells which AVL
+ * tree to add new errors.  spa_errlog_sync() is responsible for actually
+ * syncing the changes to the underlying objects.
+ */
+void
+spa_errlog_rotate(spa_t *spa)
+{
+	mutex_enter(&spa->spa_errlist_lock);
+	spa->spa_scrub_finished = B_TRUE;
+	mutex_exit(&spa->spa_errlist_lock);
+}
+
+/*
+ * Discard any pending errors from the spa_t.  Called when unloading a faulted
+ * pool, as the errors encountered during the open cannot be synced to disk.
+ */
+void
+spa_errlog_drain(spa_t *spa)
+{
+	spa_error_entry_t *se;
+	void *cookie;
+
+	mutex_enter(&spa->spa_errlist_lock);
+
+	cookie = NULL;
+	while ((se = avl_destroy_nodes(&spa->spa_errlist_last,
+	    &cookie)) != NULL)
+		kmem_free(se, sizeof (spa_error_entry_t));
+	cookie = NULL;
+	while ((se = avl_destroy_nodes(&spa->spa_errlist_scrub,
+	    &cookie)) != NULL)
+		kmem_free(se, sizeof (spa_error_entry_t));
+
+	mutex_exit(&spa->spa_errlist_lock);
+}
+
+/*
+ * Process a list of errors into the current on-disk log.
+ */
+static void
+sync_error_list(spa_t *spa, avl_tree_t *t, uint64_t *obj, dmu_tx_t *tx)
+{
+	spa_error_entry_t *se;
+	char buf[64];
+	void *cookie;
+
+	if (avl_numnodes(t) != 0) {
+		/* create log if necessary */
+		if (*obj == 0)
+			*obj = zap_create(spa->spa_meta_objset,
+			    DMU_OT_ERROR_LOG, DMU_OT_NONE,
+			    0, tx);
+
+		/* add errors to the current log */
+		for (se = avl_first(t); se != NULL; se = AVL_NEXT(t, se)) {
+			char *name = se->se_name ? se->se_name : "";
+
+			bookmark_to_name(&se->se_bookmark, buf, sizeof (buf));
+
+			(void) zap_update(spa->spa_meta_objset,
+			    *obj, buf, 1, strlen(name) + 1, name, tx);
+		}
+
+		/* purge the error list */
+		cookie = NULL;
+		while ((se = avl_destroy_nodes(t, &cookie)) != NULL)
+			kmem_free(se, sizeof (spa_error_entry_t));
+	}
+}
+
+/*
+ * Sync the error log out to disk.  This is a little tricky because the act of
+ * writing the error log requires the spa_errlist_lock.  So, we need to lock the
+ * error lists, take a copy of the lists, and then reinitialize them.  Then, we
+ * drop the error list lock and take the error log lock, at which point we
+ * do the errlog processing.  Then, if we encounter an I/O error during this
+ * process, we can successfully add the error to the list.  Note that this will
+ * result in the perpetual recycling of errors, but it is an unlikely situation
+ * and not a performance critical operation.
+ */
+void
+spa_errlog_sync(spa_t *spa, uint64_t txg)
+{
+	dmu_tx_t *tx;
+	avl_tree_t scrub, last;
+	int scrub_finished;
+
+	mutex_enter(&spa->spa_errlist_lock);
+
+	/*
+	 * Bail out early under normal circumstances.
+	 */
+	if (avl_numnodes(&spa->spa_errlist_scrub) == 0 &&
+	    avl_numnodes(&spa->spa_errlist_last) == 0 &&
+	    !spa->spa_scrub_finished) {
+		mutex_exit(&spa->spa_errlist_lock);
+		return;
+	}
+
+	spa_get_errlists(spa, &last, &scrub);
+	scrub_finished = spa->spa_scrub_finished;
+	spa->spa_scrub_finished = B_FALSE;
+
+	mutex_exit(&spa->spa_errlist_lock);
+	mutex_enter(&spa->spa_errlog_lock);
+
+	tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg);
+
+	/*
+	 * Sync out the current list of errors.
+	 */
+	sync_error_list(spa, &last, &spa->spa_errlog_last, tx);
+
+	/*
+	 * Rotate the log if necessary.
+	 */
+	if (scrub_finished) {
+		if (spa->spa_errlog_last != 0)
+			VERIFY(dmu_object_free(spa->spa_meta_objset,
+			    spa->spa_errlog_last, tx) == 0);
+		spa->spa_errlog_last = spa->spa_errlog_scrub;
+		spa->spa_errlog_scrub = 0;
+
+		sync_error_list(spa, &scrub, &spa->spa_errlog_last, tx);
+	}
+
+	/*
+	 * Sync out any pending scrub errors.
+	 */
+	sync_error_list(spa, &scrub, &spa->spa_errlog_scrub, tx);
+
+	/*
+	 * Update the MOS to reflect the new values.
+	 */
+	(void) zap_update(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+	    DMU_POOL_ERRLOG_LAST, sizeof (uint64_t), 1,
+	    &spa->spa_errlog_last, tx);
+	(void) zap_update(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
+	    DMU_POOL_ERRLOG_SCRUB, sizeof (uint64_t), 1,
+	    &spa->spa_errlog_scrub, tx);
+
+	dmu_tx_commit(tx);
+
+	mutex_exit(&spa->spa_errlog_lock);
+}
diff --git a/uts/common/fs/zfs/spa_history.c b/uts/common/fs/zfs/spa_history.c
new file mode 100644
index 000000000000..212abae5b80c
--- /dev/null
+++ b/uts/common/fs/zfs/spa_history.c
@@ -0,0 +1,502 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/spa.h>
+#include <sys/spa_impl.h>
+#include <sys/zap.h>
+#include <sys/dsl_synctask.h>
+#include <sys/dmu_tx.h>
+#include <sys/dmu_objset.h>
+#include <sys/utsname.h>
+#include <sys/cmn_err.h>
+#include <sys/sunddi.h>
+#include "zfs_comutil.h"
+#ifdef _KERNEL
+#include <sys/zone.h>
+#endif
+
+/*
+ * Routines to manage the on-disk history log.
+ *
+ * The history log is stored as a dmu object containing
+ * <packed record length, record nvlist> tuples.
+ *
+ * Where "record nvlist" is a nvlist containing uint64_ts and strings, and
+ * "packed record length" is the packed length of the "record nvlist" stored
+ * as a little endian uint64_t.
+ *
+ * The log is implemented as a ring buffer, though the original creation
+ * of the pool ('zpool create') is never overwritten.
+ *
+ * The history log is tracked as object 'spa_t::spa_history'.  The bonus buffer
+ * of 'spa_history' stores the offsets for logging/retrieving history as
+ * 'spa_history_phys_t'.  'sh_pool_create_len' is the ending offset in bytes of
+ * where the 'zpool create' record is stored.  This allows us to never
+ * overwrite the original creation of the pool.  'sh_phys_max_off' is the
+ * physical ending offset in bytes of the log.  This tells you the length of
+ * the buffer. 'sh_eof' is the logical EOF (in bytes).  Whenever a record
+ * is added, 'sh_eof' is incremented by the the size of the record.
+ * 'sh_eof' is never decremented.  'sh_bof' is the logical BOF (in bytes).
+ * This is where the consumer should start reading from after reading in
+ * the 'zpool create' portion of the log.
+ *
+ * 'sh_records_lost' keeps track of how many records have been overwritten
+ * and permanently lost.
+ */
+
+/* convert a logical offset to physical */
+static uint64_t
+spa_history_log_to_phys(uint64_t log_off, spa_history_phys_t *shpp)
+{
+	uint64_t phys_len;
+
+	phys_len = shpp->sh_phys_max_off - shpp->sh_pool_create_len;
+	return ((log_off - shpp->sh_pool_create_len) % phys_len
+	    + shpp->sh_pool_create_len);
+}
+
+void
+spa_history_create_obj(spa_t *spa, dmu_tx_t *tx)
+{
+	dmu_buf_t *dbp;
+	spa_history_phys_t *shpp;
+	objset_t *mos = spa->spa_meta_objset;
+
+	ASSERT(spa->spa_history == 0);
+	spa->spa_history = dmu_object_alloc(mos, DMU_OT_SPA_HISTORY,
+	    SPA_MAXBLOCKSIZE, DMU_OT_SPA_HISTORY_OFFSETS,
+	    sizeof (spa_history_phys_t), tx);
+
+	VERIFY(zap_add(mos, DMU_POOL_DIRECTORY_OBJECT,
+	    DMU_POOL_HISTORY, sizeof (uint64_t), 1,
+	    &spa->spa_history, tx) == 0);
+
+	VERIFY(0 == dmu_bonus_hold(mos, spa->spa_history, FTAG, &dbp));
+	ASSERT(dbp->db_size >= sizeof (spa_history_phys_t));
+
+	shpp = dbp->db_data;
+	dmu_buf_will_dirty(dbp, tx);
+
+	/*
+	 * Figure out maximum size of history log.  We set it at
+	 * 1% of pool size, with a max of 32MB and min of 128KB.
+	 */
+	shpp->sh_phys_max_off =
+	    metaslab_class_get_dspace(spa_normal_class(spa)) / 100;
+	shpp->sh_phys_max_off = MIN(shpp->sh_phys_max_off, 32<<20);
+	shpp->sh_phys_max_off = MAX(shpp->sh_phys_max_off, 128<<10);
+
+	dmu_buf_rele(dbp, FTAG);
+}
+
+/*
+ * Change 'sh_bof' to the beginning of the next record.
+ */
+static int
+spa_history_advance_bof(spa_t *spa, spa_history_phys_t *shpp)
+{
+	objset_t *mos = spa->spa_meta_objset;
+	uint64_t firstread, reclen, phys_bof;
+	char buf[sizeof (reclen)];
+	int err;
+
+	phys_bof = spa_history_log_to_phys(shpp->sh_bof, shpp);
+	firstread = MIN(sizeof (reclen), shpp->sh_phys_max_off - phys_bof);
+
+	if ((err = dmu_read(mos, spa->spa_history, phys_bof, firstread,
+	    buf, DMU_READ_PREFETCH)) != 0)
+		return (err);
+	if (firstread != sizeof (reclen)) {
+		if ((err = dmu_read(mos, spa->spa_history,
+		    shpp->sh_pool_create_len, sizeof (reclen) - firstread,
+		    buf + firstread, DMU_READ_PREFETCH)) != 0)
+			return (err);
+	}
+
+	reclen = LE_64(*((uint64_t *)buf));
+	shpp->sh_bof += reclen + sizeof (reclen);
+	shpp->sh_records_lost++;
+	return (0);
+}
+
+static int
+spa_history_write(spa_t *spa, void *buf, uint64_t len, spa_history_phys_t *shpp,
+    dmu_tx_t *tx)
+{
+	uint64_t firstwrite, phys_eof;
+	objset_t *mos = spa->spa_meta_objset;
+	int err;
+
+	ASSERT(MUTEX_HELD(&spa->spa_history_lock));
+
+	/* see if we need to reset logical BOF */
+	while (shpp->sh_phys_max_off - shpp->sh_pool_create_len -
+	    (shpp->sh_eof - shpp->sh_bof) <= len) {
+		if ((err = spa_history_advance_bof(spa, shpp)) != 0) {
+			return (err);
+		}
+	}
+
+	phys_eof = spa_history_log_to_phys(shpp->sh_eof, shpp);
+	firstwrite = MIN(len, shpp->sh_phys_max_off - phys_eof);
+	shpp->sh_eof += len;
+	dmu_write(mos, spa->spa_history, phys_eof, firstwrite, buf, tx);
+
+	len -= firstwrite;
+	if (len > 0) {
+		/* write out the rest at the beginning of physical file */
+		dmu_write(mos, spa->spa_history, shpp->sh_pool_create_len,
+		    len, (char *)buf + firstwrite, tx);
+	}
+
+	return (0);
+}
+
+static char *
+spa_history_zone()
+{
+#ifdef _KERNEL
+	return (curproc->p_zone->zone_name);
+#else
+	return ("global");
+#endif
+}
+
+/*
+ * Write out a history event.
+ */
+/*ARGSUSED*/
+static void
+spa_history_log_sync(void *arg1, void *arg2, dmu_tx_t *tx)
+{
+	spa_t		*spa = arg1;
+	history_arg_t	*hap = arg2;
+	const char	*history_str = hap->ha_history_str;
+	objset_t	*mos = spa->spa_meta_objset;
+	dmu_buf_t	*dbp;
+	spa_history_phys_t *shpp;
+	size_t		reclen;
+	uint64_t	le_len;
+	nvlist_t	*nvrecord;
+	char		*record_packed = NULL;
+	int		ret;
+
+	/*
+	 * If we have an older pool that doesn't have a command
+	 * history object, create it now.
+	 */
+	mutex_enter(&spa->spa_history_lock);
+	if (!spa->spa_history)
+		spa_history_create_obj(spa, tx);
+	mutex_exit(&spa->spa_history_lock);
+
+	/*
+	 * Get the offset of where we need to write via the bonus buffer.
+	 * Update the offset when the write completes.
+	 */
+	VERIFY(0 == dmu_bonus_hold(mos, spa->spa_history, FTAG, &dbp));
+	shpp = dbp->db_data;
+
+	dmu_buf_will_dirty(dbp, tx);
+
+#ifdef ZFS_DEBUG
+	{
+		dmu_object_info_t doi;
+		dmu_object_info_from_db(dbp, &doi);
+		ASSERT3U(doi.doi_bonus_type, ==, DMU_OT_SPA_HISTORY_OFFSETS);
+	}
+#endif
+
+	VERIFY(nvlist_alloc(&nvrecord, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	VERIFY(nvlist_add_uint64(nvrecord, ZPOOL_HIST_TIME,
+	    gethrestime_sec()) == 0);
+	VERIFY(nvlist_add_uint64(nvrecord, ZPOOL_HIST_WHO, hap->ha_uid) == 0);
+	if (hap->ha_zone != NULL)
+		VERIFY(nvlist_add_string(nvrecord, ZPOOL_HIST_ZONE,
+		    hap->ha_zone) == 0);
+#ifdef _KERNEL
+	VERIFY(nvlist_add_string(nvrecord, ZPOOL_HIST_HOST,
+	    utsname.nodename) == 0);
+#endif
+	if (hap->ha_log_type == LOG_CMD_POOL_CREATE ||
+	    hap->ha_log_type == LOG_CMD_NORMAL) {
+		VERIFY(nvlist_add_string(nvrecord, ZPOOL_HIST_CMD,
+		    history_str) == 0);
+
+		zfs_dbgmsg("command: %s", history_str);
+	} else {
+		VERIFY(nvlist_add_uint64(nvrecord, ZPOOL_HIST_INT_EVENT,
+		    hap->ha_event) == 0);
+		VERIFY(nvlist_add_uint64(nvrecord, ZPOOL_HIST_TXG,
+		    tx->tx_txg) == 0);
+		VERIFY(nvlist_add_string(nvrecord, ZPOOL_HIST_INT_STR,
+		    history_str) == 0);
+
+		zfs_dbgmsg("internal %s pool:%s txg:%llu %s",
+		    zfs_history_event_names[hap->ha_event], spa_name(spa),
+		    (longlong_t)tx->tx_txg, history_str);
+
+	}
+
+	VERIFY(nvlist_size(nvrecord, &reclen, NV_ENCODE_XDR) == 0);
+	record_packed = kmem_alloc(reclen, KM_SLEEP);
+
+	VERIFY(nvlist_pack(nvrecord, &record_packed, &reclen,
+	    NV_ENCODE_XDR, KM_SLEEP) == 0);
+
+	mutex_enter(&spa->spa_history_lock);
+	if (hap->ha_log_type == LOG_CMD_POOL_CREATE)
+		VERIFY(shpp->sh_eof == shpp->sh_pool_create_len);
+
+	/* write out the packed length as little endian */
+	le_len = LE_64((uint64_t)reclen);
+	ret = spa_history_write(spa, &le_len, sizeof (le_len), shpp, tx);
+	if (!ret)
+		ret = spa_history_write(spa, record_packed, reclen, shpp, tx);
+
+	if (!ret && hap->ha_log_type == LOG_CMD_POOL_CREATE) {
+		shpp->sh_pool_create_len += sizeof (le_len) + reclen;
+		shpp->sh_bof = shpp->sh_pool_create_len;
+	}
+
+	mutex_exit(&spa->spa_history_lock);
+	nvlist_free(nvrecord);
+	kmem_free(record_packed, reclen);
+	dmu_buf_rele(dbp, FTAG);
+
+	strfree(hap->ha_history_str);
+	if (hap->ha_zone != NULL)
+		strfree(hap->ha_zone);
+	kmem_free(hap, sizeof (history_arg_t));
+}
+
+/*
+ * Write out a history event.
+ */
+int
+spa_history_log(spa_t *spa, const char *history_str, history_log_type_t what)
+{
+	history_arg_t *ha;
+	int err = 0;
+	dmu_tx_t *tx;
+
+	ASSERT(what != LOG_INTERNAL);
+
+	tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
+	err = dmu_tx_assign(tx, TXG_WAIT);
+	if (err) {
+		dmu_tx_abort(tx);
+		return (err);
+	}
+
+	ha = kmem_alloc(sizeof (history_arg_t), KM_SLEEP);
+	ha->ha_history_str = strdup(history_str);
+	ha->ha_zone = strdup(spa_history_zone());
+	ha->ha_log_type = what;
+	ha->ha_uid = crgetuid(CRED());
+
+	/* Kick this off asynchronously; errors are ignored. */
+	dsl_sync_task_do_nowait(spa_get_dsl(spa), NULL,
+	    spa_history_log_sync, spa, ha, 0, tx);
+	dmu_tx_commit(tx);
+
+	/* spa_history_log_sync will free ha and strings */
+	return (err);
+}
+
+/*
+ * Read out the command history.
+ */
+int
+spa_history_get(spa_t *spa, uint64_t *offp, uint64_t *len, char *buf)
+{
+	objset_t *mos = spa->spa_meta_objset;
+	dmu_buf_t *dbp;
+	uint64_t read_len, phys_read_off, phys_eof;
+	uint64_t leftover = 0;
+	spa_history_phys_t *shpp;
+	int err;
+
+	/*
+	 * If the command history  doesn't exist (older pool),
+	 * that's ok, just return ENOENT.
+	 */
+	if (!spa->spa_history)
+		return (ENOENT);
+
+	/*
+	 * The history is logged asynchronously, so when they request
+	 * the first chunk of history, make sure everything has been
+	 * synced to disk so that we get it.
+	 */
+	if (*offp == 0 && spa_writeable(spa))
+		txg_wait_synced(spa_get_dsl(spa), 0);
+
+	if ((err = dmu_bonus_hold(mos, spa->spa_history, FTAG, &dbp)) != 0)
+		return (err);
+	shpp = dbp->db_data;
+
+#ifdef ZFS_DEBUG
+	{
+		dmu_object_info_t doi;
+		dmu_object_info_from_db(dbp, &doi);
+		ASSERT3U(doi.doi_bonus_type, ==, DMU_OT_SPA_HISTORY_OFFSETS);
+	}
+#endif
+
+	mutex_enter(&spa->spa_history_lock);
+	phys_eof = spa_history_log_to_phys(shpp->sh_eof, shpp);
+
+	if (*offp < shpp->sh_pool_create_len) {
+		/* read in just the zpool create history */
+		phys_read_off = *offp;
+		read_len = MIN(*len, shpp->sh_pool_create_len -
+		    phys_read_off);
+	} else {
+		/*
+		 * Need to reset passed in offset to BOF if the passed in
+		 * offset has since been overwritten.
+		 */
+		*offp = MAX(*offp, shpp->sh_bof);
+		phys_read_off = spa_history_log_to_phys(*offp, shpp);
+
+		/*
+		 * Read up to the minimum of what the user passed down or
+		 * the EOF (physical or logical).  If we hit physical EOF,
+		 * use 'leftover' to read from the physical BOF.
+		 */
+		if (phys_read_off <= phys_eof) {
+			read_len = MIN(*len, phys_eof - phys_read_off);
+		} else {
+			read_len = MIN(*len,
+			    shpp->sh_phys_max_off - phys_read_off);
+			if (phys_read_off + *len > shpp->sh_phys_max_off) {
+				leftover = MIN(*len - read_len,
+				    phys_eof - shpp->sh_pool_create_len);
+			}
+		}
+	}
+
+	/* offset for consumer to use next */
+	*offp += read_len + leftover;
+
+	/* tell the consumer how much you actually read */
+	*len = read_len + leftover;
+
+	if (read_len == 0) {
+		mutex_exit(&spa->spa_history_lock);
+		dmu_buf_rele(dbp, FTAG);
+		return (0);
+	}
+
+	err = dmu_read(mos, spa->spa_history, phys_read_off, read_len, buf,
+	    DMU_READ_PREFETCH);
+	if (leftover && err == 0) {
+		err = dmu_read(mos, spa->spa_history, shpp->sh_pool_create_len,
+		    leftover, buf + read_len, DMU_READ_PREFETCH);
+	}
+	mutex_exit(&spa->spa_history_lock);
+
+	dmu_buf_rele(dbp, FTAG);
+	return (err);
+}
+
+static void
+log_internal(history_internal_events_t event, spa_t *spa,
+    dmu_tx_t *tx, const char *fmt, va_list adx)
+{
+	history_arg_t *ha;
+
+	/*
+	 * If this is part of creating a pool, not everything is
+	 * initialized yet, so don't bother logging the internal events.
+	 */
+	if (tx->tx_txg == TXG_INITIAL)
+		return;
+
+	ha = kmem_alloc(sizeof (history_arg_t), KM_SLEEP);
+	ha->ha_history_str = kmem_alloc(vsnprintf(NULL, 0, fmt, adx) + 1,
+	    KM_SLEEP);
+
+	(void) vsprintf(ha->ha_history_str, fmt, adx);
+
+	ha->ha_log_type = LOG_INTERNAL;
+	ha->ha_event = event;
+	ha->ha_zone = NULL;
+	ha->ha_uid = 0;
+
+	if (dmu_tx_is_syncing(tx)) {
+		spa_history_log_sync(spa, ha, tx);
+	} else {
+		dsl_sync_task_do_nowait(spa_get_dsl(spa), NULL,
+		    spa_history_log_sync, spa, ha, 0, tx);
+	}
+	/* spa_history_log_sync() will free ha and strings */
+}
+
+void
+spa_history_log_internal(history_internal_events_t event, spa_t *spa,
+    dmu_tx_t *tx, const char *fmt, ...)
+{
+	dmu_tx_t *htx = tx;
+	va_list adx;
+
+	/* create a tx if we didn't get one */
+	if (tx == NULL) {
+		htx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
+		if (dmu_tx_assign(htx, TXG_WAIT) != 0) {
+			dmu_tx_abort(htx);
+			return;
+		}
+	}
+
+	va_start(adx, fmt);
+	log_internal(event, spa, htx, fmt, adx);
+	va_end(adx);
+
+	/* if we didn't get a tx from the caller, commit the one we made */
+	if (tx == NULL)
+		dmu_tx_commit(htx);
+}
+
+void
+spa_history_log_version(spa_t *spa, history_internal_events_t event)
+{
+#ifdef _KERNEL
+	uint64_t current_vers = spa_version(spa);
+
+	if (current_vers >= SPA_VERSION_ZPOOL_HISTORY) {
+		spa_history_log_internal(event, spa, NULL,
+		    "pool spa %llu; zfs spa %llu; zpl %d; uts %s %s %s %s",
+		    (u_longlong_t)current_vers, SPA_VERSION, ZPL_VERSION,
+		    utsname.nodename, utsname.release, utsname.version,
+		    utsname.machine);
+	}
+	cmn_err(CE_CONT, "!%s version %llu pool %s using %llu",
+	    event == LOG_POOL_IMPORT ? "imported" :
+	    event == LOG_POOL_CREATE ? "created" : "accessed",
+	    (u_longlong_t)current_vers, spa_name(spa), SPA_VERSION);
+#endif
+}
diff --git a/uts/common/fs/zfs/spa_misc.c b/uts/common/fs/zfs/spa_misc.c
new file mode 100644
index 000000000000..1b54afb0be5e
--- /dev/null
+++ b/uts/common/fs/zfs/spa_misc.c
@@ -0,0 +1,1672 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa_impl.h>
+#include <sys/zio.h>
+#include <sys/zio_checksum.h>
+#include <sys/zio_compress.h>
+#include <sys/dmu.h>
+#include <sys/dmu_tx.h>
+#include <sys/zap.h>
+#include <sys/zil.h>
+#include <sys/vdev_impl.h>
+#include <sys/metaslab.h>
+#include <sys/uberblock_impl.h>
+#include <sys/txg.h>
+#include <sys/avl.h>
+#include <sys/unique.h>
+#include <sys/dsl_pool.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_scan.h>
+#include <sys/fs/zfs.h>
+#include <sys/metaslab_impl.h>
+#include <sys/arc.h>
+#include <sys/ddt.h>
+#include "zfs_prop.h"
+
+/*
+ * SPA locking
+ *
+ * There are four basic locks for managing spa_t structures:
+ *
+ * spa_namespace_lock (global mutex)
+ *
+ *	This lock must be acquired to do any of the following:
+ *
+ *		- Lookup a spa_t by name
+ *		- Add or remove a spa_t from the namespace
+ *		- Increase spa_refcount from non-zero
+ *		- Check if spa_refcount is zero
+ *		- Rename a spa_t
+ *		- add/remove/attach/detach devices
+ *		- Held for the duration of create/destroy/import/export
+ *
+ *	It does not need to handle recursion.  A create or destroy may
+ *	reference objects (files or zvols) in other pools, but by
+ *	definition they must have an existing reference, and will never need
+ *	to lookup a spa_t by name.
+ *
+ * spa_refcount (per-spa refcount_t protected by mutex)
+ *
+ *	This reference count keep track of any active users of the spa_t.  The
+ *	spa_t cannot be destroyed or freed while this is non-zero.  Internally,
+ *	the refcount is never really 'zero' - opening a pool implicitly keeps
+ *	some references in the DMU.  Internally we check against spa_minref, but
+ *	present the image of a zero/non-zero value to consumers.
+ *
+ * spa_config_lock[] (per-spa array of rwlocks)
+ *
+ *	This protects the spa_t from config changes, and must be held in
+ *	the following circumstances:
+ *
+ *		- RW_READER to perform I/O to the spa
+ *		- RW_WRITER to change the vdev config
+ *
+ * The locking order is fairly straightforward:
+ *
+ *		spa_namespace_lock	->	spa_refcount
+ *
+ *	The namespace lock must be acquired to increase the refcount from 0
+ *	or to check if it is zero.
+ *
+ *		spa_refcount		->	spa_config_lock[]
+ *
+ *	There must be at least one valid reference on the spa_t to acquire
+ *	the config lock.
+ *
+ *		spa_namespace_lock	->	spa_config_lock[]
+ *
+ *	The namespace lock must always be taken before the config lock.
+ *
+ *
+ * The spa_namespace_lock can be acquired directly and is globally visible.
+ *
+ * The namespace is manipulated using the following functions, all of which
+ * require the spa_namespace_lock to be held.
+ *
+ *	spa_lookup()		Lookup a spa_t by name.
+ *
+ *	spa_add()		Create a new spa_t in the namespace.
+ *
+ *	spa_remove()		Remove a spa_t from the namespace.  This also
+ *				frees up any memory associated with the spa_t.
+ *
+ *	spa_next()		Returns the next spa_t in the system, or the
+ *				first if NULL is passed.
+ *
+ *	spa_evict_all()		Shutdown and remove all spa_t structures in
+ *				the system.
+ *
+ *	spa_guid_exists()	Determine whether a pool/device guid exists.
+ *
+ * The spa_refcount is manipulated using the following functions:
+ *
+ *	spa_open_ref()		Adds a reference to the given spa_t.  Must be
+ *				called with spa_namespace_lock held if the
+ *				refcount is currently zero.
+ *
+ *	spa_close()		Remove a reference from the spa_t.  This will
+ *				not free the spa_t or remove it from the
+ *				namespace.  No locking is required.
+ *
+ *	spa_refcount_zero()	Returns true if the refcount is currently
+ *				zero.  Must be called with spa_namespace_lock
+ *				held.
+ *
+ * The spa_config_lock[] is an array of rwlocks, ordered as follows:
+ * SCL_CONFIG > SCL_STATE > SCL_ALLOC > SCL_ZIO > SCL_FREE > SCL_VDEV.
+ * spa_config_lock[] is manipulated with spa_config_{enter,exit,held}().
+ *
+ * To read the configuration, it suffices to hold one of these locks as reader.
+ * To modify the configuration, you must hold all locks as writer.  To modify
+ * vdev state without altering the vdev tree's topology (e.g. online/offline),
+ * you must hold SCL_STATE and SCL_ZIO as writer.
+ *
+ * We use these distinct config locks to avoid recursive lock entry.
+ * For example, spa_sync() (which holds SCL_CONFIG as reader) induces
+ * block allocations (SCL_ALLOC), which may require reading space maps
+ * from disk (dmu_read() -> zio_read() -> SCL_ZIO).
+ *
+ * The spa config locks cannot be normal rwlocks because we need the
+ * ability to hand off ownership.  For example, SCL_ZIO is acquired
+ * by the issuing thread and later released by an interrupt thread.
+ * They do, however, obey the usual write-wanted semantics to prevent
+ * writer (i.e. system administrator) starvation.
+ *
+ * The lock acquisition rules are as follows:
+ *
+ * SCL_CONFIG
+ *	Protects changes to the vdev tree topology, such as vdev
+ *	add/remove/attach/detach.  Protects the dirty config list
+ *	(spa_config_dirty_list) and the set of spares and l2arc devices.
+ *
+ * SCL_STATE
+ *	Protects changes to pool state and vdev state, such as vdev
+ *	online/offline/fault/degrade/clear.  Protects the dirty state list
+ *	(spa_state_dirty_list) and global pool state (spa_state).
+ *
+ * SCL_ALLOC
+ *	Protects changes to metaslab groups and classes.
+ *	Held as reader by metaslab_alloc() and metaslab_claim().
+ *
+ * SCL_ZIO
+ *	Held by bp-level zios (those which have no io_vd upon entry)
+ *	to prevent changes to the vdev tree.  The bp-level zio implicitly
+ *	protects all of its vdev child zios, which do not hold SCL_ZIO.
+ *
+ * SCL_FREE
+ *	Protects changes to metaslab groups and classes.
+ *	Held as reader by metaslab_free().  SCL_FREE is distinct from
+ *	SCL_ALLOC, and lower than SCL_ZIO, so that we can safely free
+ *	blocks in zio_done() while another i/o that holds either
+ *	SCL_ALLOC or SCL_ZIO is waiting for this i/o to complete.
+ *
+ * SCL_VDEV
+ *	Held as reader to prevent changes to the vdev tree during trivial
+ *	inquiries such as bp_get_dsize().  SCL_VDEV is distinct from the
+ *	other locks, and lower than all of them, to ensure that it's safe
+ *	to acquire regardless of caller context.
+ *
+ * In addition, the following rules apply:
+ *
+ * (a)	spa_props_lock protects pool properties, spa_config and spa_config_list.
+ *	The lock ordering is SCL_CONFIG > spa_props_lock.
+ *
+ * (b)	I/O operations on leaf vdevs.  For any zio operation that takes
+ *	an explicit vdev_t argument -- such as zio_ioctl(), zio_read_phys(),
+ *	or zio_write_phys() -- the caller must ensure that the config cannot
+ *	cannot change in the interim, and that the vdev cannot be reopened.
+ *	SCL_STATE as reader suffices for both.
+ *
+ * The vdev configuration is protected by spa_vdev_enter() / spa_vdev_exit().
+ *
+ *	spa_vdev_enter()	Acquire the namespace lock and the config lock
+ *				for writing.
+ *
+ *	spa_vdev_exit()		Release the config lock, wait for all I/O
+ *				to complete, sync the updated configs to the
+ *				cache, and release the namespace lock.
+ *
+ * vdev state is protected by spa_vdev_state_enter() / spa_vdev_state_exit().
+ * Like spa_vdev_enter/exit, these are convenience wrappers -- the actual
+ * locking is, always, based on spa_namespace_lock and spa_config_lock[].
+ *
+ * spa_rename() is also implemented within this file since is requires
+ * manipulation of the namespace.
+ */
+
+static avl_tree_t spa_namespace_avl;
+kmutex_t spa_namespace_lock;
+static kcondvar_t spa_namespace_cv;
+static int spa_active_count;
+int spa_max_replication_override = SPA_DVAS_PER_BP;
+
+static kmutex_t spa_spare_lock;
+static avl_tree_t spa_spare_avl;
+static kmutex_t spa_l2cache_lock;
+static avl_tree_t spa_l2cache_avl;
+
+kmem_cache_t *spa_buffer_pool;
+int spa_mode_global;
+
+#ifdef ZFS_DEBUG
+/* Everything except dprintf is on by default in debug builds */
+int zfs_flags = ~ZFS_DEBUG_DPRINTF;
+#else
+int zfs_flags = 0;
+#endif
+
+/*
+ * zfs_recover can be set to nonzero to attempt to recover from
+ * otherwise-fatal errors, typically caused by on-disk corruption.  When
+ * set, calls to zfs_panic_recover() will turn into warning messages.
+ */
+int zfs_recover = 0;
+
+
+/*
+ * ==========================================================================
+ * SPA config locking
+ * ==========================================================================
+ */
+static void
+spa_config_lock_init(spa_t *spa)
+{
+	for (int i = 0; i < SCL_LOCKS; i++) {
+		spa_config_lock_t *scl = &spa->spa_config_lock[i];
+		mutex_init(&scl->scl_lock, NULL, MUTEX_DEFAULT, NULL);
+		cv_init(&scl->scl_cv, NULL, CV_DEFAULT, NULL);
+		refcount_create(&scl->scl_count);
+		scl->scl_writer = NULL;
+		scl->scl_write_wanted = 0;
+	}
+}
+
+static void
+spa_config_lock_destroy(spa_t *spa)
+{
+	for (int i = 0; i < SCL_LOCKS; i++) {
+		spa_config_lock_t *scl = &spa->spa_config_lock[i];
+		mutex_destroy(&scl->scl_lock);
+		cv_destroy(&scl->scl_cv);
+		refcount_destroy(&scl->scl_count);
+		ASSERT(scl->scl_writer == NULL);
+		ASSERT(scl->scl_write_wanted == 0);
+	}
+}
+
+int
+spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw)
+{
+	for (int i = 0; i < SCL_LOCKS; i++) {
+		spa_config_lock_t *scl = &spa->spa_config_lock[i];
+		if (!(locks & (1 << i)))
+			continue;
+		mutex_enter(&scl->scl_lock);
+		if (rw == RW_READER) {
+			if (scl->scl_writer || scl->scl_write_wanted) {
+				mutex_exit(&scl->scl_lock);
+				spa_config_exit(spa, locks ^ (1 << i), tag);
+				return (0);
+			}
+		} else {
+			ASSERT(scl->scl_writer != curthread);
+			if (!refcount_is_zero(&scl->scl_count)) {
+				mutex_exit(&scl->scl_lock);
+				spa_config_exit(spa, locks ^ (1 << i), tag);
+				return (0);
+			}
+			scl->scl_writer = curthread;
+		}
+		(void) refcount_add(&scl->scl_count, tag);
+		mutex_exit(&scl->scl_lock);
+	}
+	return (1);
+}
+
+void
+spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw)
+{
+	int wlocks_held = 0;
+
+	for (int i = 0; i < SCL_LOCKS; i++) {
+		spa_config_lock_t *scl = &spa->spa_config_lock[i];
+		if (scl->scl_writer == curthread)
+			wlocks_held |= (1 << i);
+		if (!(locks & (1 << i)))
+			continue;
+		mutex_enter(&scl->scl_lock);
+		if (rw == RW_READER) {
+			while (scl->scl_writer || scl->scl_write_wanted) {
+				cv_wait(&scl->scl_cv, &scl->scl_lock);
+			}
+		} else {
+			ASSERT(scl->scl_writer != curthread);
+			while (!refcount_is_zero(&scl->scl_count)) {
+				scl->scl_write_wanted++;
+				cv_wait(&scl->scl_cv, &scl->scl_lock);
+				scl->scl_write_wanted--;
+			}
+			scl->scl_writer = curthread;
+		}
+		(void) refcount_add(&scl->scl_count, tag);
+		mutex_exit(&scl->scl_lock);
+	}
+	ASSERT(wlocks_held <= locks);
+}
+
+void
+spa_config_exit(spa_t *spa, int locks, void *tag)
+{
+	for (int i = SCL_LOCKS - 1; i >= 0; i--) {
+		spa_config_lock_t *scl = &spa->spa_config_lock[i];
+		if (!(locks & (1 << i)))
+			continue;
+		mutex_enter(&scl->scl_lock);
+		ASSERT(!refcount_is_zero(&scl->scl_count));
+		if (refcount_remove(&scl->scl_count, tag) == 0) {
+			ASSERT(scl->scl_writer == NULL ||
+			    scl->scl_writer == curthread);
+			scl->scl_writer = NULL;	/* OK in either case */
+			cv_broadcast(&scl->scl_cv);
+		}
+		mutex_exit(&scl->scl_lock);
+	}
+}
+
+int
+spa_config_held(spa_t *spa, int locks, krw_t rw)
+{
+	int locks_held = 0;
+
+	for (int i = 0; i < SCL_LOCKS; i++) {
+		spa_config_lock_t *scl = &spa->spa_config_lock[i];
+		if (!(locks & (1 << i)))
+			continue;
+		if ((rw == RW_READER && !refcount_is_zero(&scl->scl_count)) ||
+		    (rw == RW_WRITER && scl->scl_writer == curthread))
+			locks_held |= 1 << i;
+	}
+
+	return (locks_held);
+}
+
+/*
+ * ==========================================================================
+ * SPA namespace functions
+ * ==========================================================================
+ */
+
+/*
+ * Lookup the named spa_t in the AVL tree.  The spa_namespace_lock must be held.
+ * Returns NULL if no matching spa_t is found.
+ */
+spa_t *
+spa_lookup(const char *name)
+{
+	static spa_t search;	/* spa_t is large; don't allocate on stack */
+	spa_t *spa;
+	avl_index_t where;
+	char c;
+	char *cp;
+
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+
+	/*
+	 * If it's a full dataset name, figure out the pool name and
+	 * just use that.
+	 */
+	cp = strpbrk(name, "/@");
+	if (cp) {
+		c = *cp;
+		*cp = '\0';
+	}
+
+	(void) strlcpy(search.spa_name, name, sizeof (search.spa_name));
+	spa = avl_find(&spa_namespace_avl, &search, &where);
+
+	if (cp)
+		*cp = c;
+
+	return (spa);
+}
+
+/*
+ * Create an uninitialized spa_t with the given name.  Requires
+ * spa_namespace_lock.  The caller must ensure that the spa_t doesn't already
+ * exist by calling spa_lookup() first.
+ */
+spa_t *
+spa_add(const char *name, nvlist_t *config, const char *altroot)
+{
+	spa_t *spa;
+	spa_config_dirent_t *dp;
+
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+
+	spa = kmem_zalloc(sizeof (spa_t), KM_SLEEP);
+
+	mutex_init(&spa->spa_async_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&spa->spa_errlist_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&spa->spa_errlog_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&spa->spa_history_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&spa->spa_proc_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&spa->spa_props_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&spa->spa_scrub_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&spa->spa_suspend_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&spa->spa_vdev_top_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	cv_init(&spa->spa_async_cv, NULL, CV_DEFAULT, NULL);
+	cv_init(&spa->spa_proc_cv, NULL, CV_DEFAULT, NULL);
+	cv_init(&spa->spa_scrub_io_cv, NULL, CV_DEFAULT, NULL);
+	cv_init(&spa->spa_suspend_cv, NULL, CV_DEFAULT, NULL);
+
+	for (int t = 0; t < TXG_SIZE; t++)
+		bplist_create(&spa->spa_free_bplist[t]);
+
+	(void) strlcpy(spa->spa_name, name, sizeof (spa->spa_name));
+	spa->spa_state = POOL_STATE_UNINITIALIZED;
+	spa->spa_freeze_txg = UINT64_MAX;
+	spa->spa_final_txg = UINT64_MAX;
+	spa->spa_load_max_txg = UINT64_MAX;
+	spa->spa_proc = &p0;
+	spa->spa_proc_state = SPA_PROC_NONE;
+
+	refcount_create(&spa->spa_refcount);
+	spa_config_lock_init(spa);
+
+	avl_add(&spa_namespace_avl, spa);
+
+	/*
+	 * Set the alternate root, if there is one.
+	 */
+	if (altroot) {
+		spa->spa_root = spa_strdup(altroot);
+		spa_active_count++;
+	}
+
+	/*
+	 * Every pool starts with the default cachefile
+	 */
+	list_create(&spa->spa_config_list, sizeof (spa_config_dirent_t),
+	    offsetof(spa_config_dirent_t, scd_link));
+
+	dp = kmem_zalloc(sizeof (spa_config_dirent_t), KM_SLEEP);
+	dp->scd_path = altroot ? NULL : spa_strdup(spa_config_path);
+	list_insert_head(&spa->spa_config_list, dp);
+
+	VERIFY(nvlist_alloc(&spa->spa_load_info, NV_UNIQUE_NAME,
+	    KM_SLEEP) == 0);
+
+	if (config != NULL)
+		VERIFY(nvlist_dup(config, &spa->spa_config, 0) == 0);
+
+	return (spa);
+}
+
+/*
+ * Removes a spa_t from the namespace, freeing up any memory used.  Requires
+ * spa_namespace_lock.  This is called only after the spa_t has been closed and
+ * deactivated.
+ */
+void
+spa_remove(spa_t *spa)
+{
+	spa_config_dirent_t *dp;
+
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+	ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED);
+
+	nvlist_free(spa->spa_config_splitting);
+
+	avl_remove(&spa_namespace_avl, spa);
+	cv_broadcast(&spa_namespace_cv);
+
+	if (spa->spa_root) {
+		spa_strfree(spa->spa_root);
+		spa_active_count--;
+	}
+
+	while ((dp = list_head(&spa->spa_config_list)) != NULL) {
+		list_remove(&spa->spa_config_list, dp);
+		if (dp->scd_path != NULL)
+			spa_strfree(dp->scd_path);
+		kmem_free(dp, sizeof (spa_config_dirent_t));
+	}
+
+	list_destroy(&spa->spa_config_list);
+
+	nvlist_free(spa->spa_load_info);
+	spa_config_set(spa, NULL);
+
+	refcount_destroy(&spa->spa_refcount);
+
+	spa_config_lock_destroy(spa);
+
+	for (int t = 0; t < TXG_SIZE; t++)
+		bplist_destroy(&spa->spa_free_bplist[t]);
+
+	cv_destroy(&spa->spa_async_cv);
+	cv_destroy(&spa->spa_proc_cv);
+	cv_destroy(&spa->spa_scrub_io_cv);
+	cv_destroy(&spa->spa_suspend_cv);
+
+	mutex_destroy(&spa->spa_async_lock);
+	mutex_destroy(&spa->spa_errlist_lock);
+	mutex_destroy(&spa->spa_errlog_lock);
+	mutex_destroy(&spa->spa_history_lock);
+	mutex_destroy(&spa->spa_proc_lock);
+	mutex_destroy(&spa->spa_props_lock);
+	mutex_destroy(&spa->spa_scrub_lock);
+	mutex_destroy(&spa->spa_suspend_lock);
+	mutex_destroy(&spa->spa_vdev_top_lock);
+
+	kmem_free(spa, sizeof (spa_t));
+}
+
+/*
+ * Given a pool, return the next pool in the namespace, or NULL if there is
+ * none.  If 'prev' is NULL, return the first pool.
+ */
+spa_t *
+spa_next(spa_t *prev)
+{
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+
+	if (prev)
+		return (AVL_NEXT(&spa_namespace_avl, prev));
+	else
+		return (avl_first(&spa_namespace_avl));
+}
+
+/*
+ * ==========================================================================
+ * SPA refcount functions
+ * ==========================================================================
+ */
+
+/*
+ * Add a reference to the given spa_t.  Must have at least one reference, or
+ * have the namespace lock held.
+ */
+void
+spa_open_ref(spa_t *spa, void *tag)
+{
+	ASSERT(refcount_count(&spa->spa_refcount) >= spa->spa_minref ||
+	    MUTEX_HELD(&spa_namespace_lock));
+	(void) refcount_add(&spa->spa_refcount, tag);
+}
+
+/*
+ * Remove a reference to the given spa_t.  Must have at least one reference, or
+ * have the namespace lock held.
+ */
+void
+spa_close(spa_t *spa, void *tag)
+{
+	ASSERT(refcount_count(&spa->spa_refcount) > spa->spa_minref ||
+	    MUTEX_HELD(&spa_namespace_lock));
+	(void) refcount_remove(&spa->spa_refcount, tag);
+}
+
+/*
+ * Check to see if the spa refcount is zero.  Must be called with
+ * spa_namespace_lock held.  We really compare against spa_minref, which is the
+ * number of references acquired when opening a pool
+ */
+boolean_t
+spa_refcount_zero(spa_t *spa)
+{
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+
+	return (refcount_count(&spa->spa_refcount) == spa->spa_minref);
+}
+
+/*
+ * ==========================================================================
+ * SPA spare and l2cache tracking
+ * ==========================================================================
+ */
+
+/*
+ * Hot spares and cache devices are tracked using the same code below,
+ * for 'auxiliary' devices.
+ */
+
+typedef struct spa_aux {
+	uint64_t	aux_guid;
+	uint64_t	aux_pool;
+	avl_node_t	aux_avl;
+	int		aux_count;
+} spa_aux_t;
+
+static int
+spa_aux_compare(const void *a, const void *b)
+{
+	const spa_aux_t *sa = a;
+	const spa_aux_t *sb = b;
+
+	if (sa->aux_guid < sb->aux_guid)
+		return (-1);
+	else if (sa->aux_guid > sb->aux_guid)
+		return (1);
+	else
+		return (0);
+}
+
+void
+spa_aux_add(vdev_t *vd, avl_tree_t *avl)
+{
+	avl_index_t where;
+	spa_aux_t search;
+	spa_aux_t *aux;
+
+	search.aux_guid = vd->vdev_guid;
+	if ((aux = avl_find(avl, &search, &where)) != NULL) {
+		aux->aux_count++;
+	} else {
+		aux = kmem_zalloc(sizeof (spa_aux_t), KM_SLEEP);
+		aux->aux_guid = vd->vdev_guid;
+		aux->aux_count = 1;
+		avl_insert(avl, aux, where);
+	}
+}
+
+void
+spa_aux_remove(vdev_t *vd, avl_tree_t *avl)
+{
+	spa_aux_t search;
+	spa_aux_t *aux;
+	avl_index_t where;
+
+	search.aux_guid = vd->vdev_guid;
+	aux = avl_find(avl, &search, &where);
+
+	ASSERT(aux != NULL);
+
+	if (--aux->aux_count == 0) {
+		avl_remove(avl, aux);
+		kmem_free(aux, sizeof (spa_aux_t));
+	} else if (aux->aux_pool == spa_guid(vd->vdev_spa)) {
+		aux->aux_pool = 0ULL;
+	}
+}
+
+boolean_t
+spa_aux_exists(uint64_t guid, uint64_t *pool, int *refcnt, avl_tree_t *avl)
+{
+	spa_aux_t search, *found;
+
+	search.aux_guid = guid;
+	found = avl_find(avl, &search, NULL);
+
+	if (pool) {
+		if (found)
+			*pool = found->aux_pool;
+		else
+			*pool = 0ULL;
+	}
+
+	if (refcnt) {
+		if (found)
+			*refcnt = found->aux_count;
+		else
+			*refcnt = 0;
+	}
+
+	return (found != NULL);
+}
+
+void
+spa_aux_activate(vdev_t *vd, avl_tree_t *avl)
+{
+	spa_aux_t search, *found;
+	avl_index_t where;
+
+	search.aux_guid = vd->vdev_guid;
+	found = avl_find(avl, &search, &where);
+	ASSERT(found != NULL);
+	ASSERT(found->aux_pool == 0ULL);
+
+	found->aux_pool = spa_guid(vd->vdev_spa);
+}
+
+/*
+ * Spares are tracked globally due to the following constraints:
+ *
+ * 	- A spare may be part of multiple pools.
+ * 	- A spare may be added to a pool even if it's actively in use within
+ *	  another pool.
+ * 	- A spare in use in any pool can only be the source of a replacement if
+ *	  the target is a spare in the same pool.
+ *
+ * We keep track of all spares on the system through the use of a reference
+ * counted AVL tree.  When a vdev is added as a spare, or used as a replacement
+ * spare, then we bump the reference count in the AVL tree.  In addition, we set
+ * the 'vdev_isspare' member to indicate that the device is a spare (active or
+ * inactive).  When a spare is made active (used to replace a device in the
+ * pool), we also keep track of which pool its been made a part of.
+ *
+ * The 'spa_spare_lock' protects the AVL tree.  These functions are normally
+ * called under the spa_namespace lock as part of vdev reconfiguration.  The
+ * separate spare lock exists for the status query path, which does not need to
+ * be completely consistent with respect to other vdev configuration changes.
+ */
+
+static int
+spa_spare_compare(const void *a, const void *b)
+{
+	return (spa_aux_compare(a, b));
+}
+
+void
+spa_spare_add(vdev_t *vd)
+{
+	mutex_enter(&spa_spare_lock);
+	ASSERT(!vd->vdev_isspare);
+	spa_aux_add(vd, &spa_spare_avl);
+	vd->vdev_isspare = B_TRUE;
+	mutex_exit(&spa_spare_lock);
+}
+
+void
+spa_spare_remove(vdev_t *vd)
+{
+	mutex_enter(&spa_spare_lock);
+	ASSERT(vd->vdev_isspare);
+	spa_aux_remove(vd, &spa_spare_avl);
+	vd->vdev_isspare = B_FALSE;
+	mutex_exit(&spa_spare_lock);
+}
+
+boolean_t
+spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt)
+{
+	boolean_t found;
+
+	mutex_enter(&spa_spare_lock);
+	found = spa_aux_exists(guid, pool, refcnt, &spa_spare_avl);
+	mutex_exit(&spa_spare_lock);
+
+	return (found);
+}
+
+void
+spa_spare_activate(vdev_t *vd)
+{
+	mutex_enter(&spa_spare_lock);
+	ASSERT(vd->vdev_isspare);
+	spa_aux_activate(vd, &spa_spare_avl);
+	mutex_exit(&spa_spare_lock);
+}
+
+/*
+ * Level 2 ARC devices are tracked globally for the same reasons as spares.
+ * Cache devices currently only support one pool per cache device, and so
+ * for these devices the aux reference count is currently unused beyond 1.
+ */
+
+static int
+spa_l2cache_compare(const void *a, const void *b)
+{
+	return (spa_aux_compare(a, b));
+}
+
+void
+spa_l2cache_add(vdev_t *vd)
+{
+	mutex_enter(&spa_l2cache_lock);
+	ASSERT(!vd->vdev_isl2cache);
+	spa_aux_add(vd, &spa_l2cache_avl);
+	vd->vdev_isl2cache = B_TRUE;
+	mutex_exit(&spa_l2cache_lock);
+}
+
+void
+spa_l2cache_remove(vdev_t *vd)
+{
+	mutex_enter(&spa_l2cache_lock);
+	ASSERT(vd->vdev_isl2cache);
+	spa_aux_remove(vd, &spa_l2cache_avl);
+	vd->vdev_isl2cache = B_FALSE;
+	mutex_exit(&spa_l2cache_lock);
+}
+
+boolean_t
+spa_l2cache_exists(uint64_t guid, uint64_t *pool)
+{
+	boolean_t found;
+
+	mutex_enter(&spa_l2cache_lock);
+	found = spa_aux_exists(guid, pool, NULL, &spa_l2cache_avl);
+	mutex_exit(&spa_l2cache_lock);
+
+	return (found);
+}
+
+void
+spa_l2cache_activate(vdev_t *vd)
+{
+	mutex_enter(&spa_l2cache_lock);
+	ASSERT(vd->vdev_isl2cache);
+	spa_aux_activate(vd, &spa_l2cache_avl);
+	mutex_exit(&spa_l2cache_lock);
+}
+
+/*
+ * ==========================================================================
+ * SPA vdev locking
+ * ==========================================================================
+ */
+
+/*
+ * Lock the given spa_t for the purpose of adding or removing a vdev.
+ * Grabs the global spa_namespace_lock plus the spa config lock for writing.
+ * It returns the next transaction group for the spa_t.
+ */
+uint64_t
+spa_vdev_enter(spa_t *spa)
+{
+	mutex_enter(&spa->spa_vdev_top_lock);
+	mutex_enter(&spa_namespace_lock);
+	return (spa_vdev_config_enter(spa));
+}
+
+/*
+ * Internal implementation for spa_vdev_enter().  Used when a vdev
+ * operation requires multiple syncs (i.e. removing a device) while
+ * keeping the spa_namespace_lock held.
+ */
+uint64_t
+spa_vdev_config_enter(spa_t *spa)
+{
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+
+	spa_config_enter(spa, SCL_ALL, spa, RW_WRITER);
+
+	return (spa_last_synced_txg(spa) + 1);
+}
+
+/*
+ * Used in combination with spa_vdev_config_enter() to allow the syncing
+ * of multiple transactions without releasing the spa_namespace_lock.
+ */
+void
+spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error, char *tag)
+{
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+
+	int config_changed = B_FALSE;
+
+	ASSERT(txg > spa_last_synced_txg(spa));
+
+	spa->spa_pending_vdev = NULL;
+
+	/*
+	 * Reassess the DTLs.
+	 */
+	vdev_dtl_reassess(spa->spa_root_vdev, 0, 0, B_FALSE);
+
+	if (error == 0 && !list_is_empty(&spa->spa_config_dirty_list)) {
+		config_changed = B_TRUE;
+		spa->spa_config_generation++;
+	}
+
+	/*
+	 * Verify the metaslab classes.
+	 */
+	ASSERT(metaslab_class_validate(spa_normal_class(spa)) == 0);
+	ASSERT(metaslab_class_validate(spa_log_class(spa)) == 0);
+
+	spa_config_exit(spa, SCL_ALL, spa);
+
+	/*
+	 * Panic the system if the specified tag requires it.  This
+	 * is useful for ensuring that configurations are updated
+	 * transactionally.
+	 */
+	if (zio_injection_enabled)
+		zio_handle_panic_injection(spa, tag, 0);
+
+	/*
+	 * Note: this txg_wait_synced() is important because it ensures
+	 * that there won't be more than one config change per txg.
+	 * This allows us to use the txg as the generation number.
+	 */
+	if (error == 0)
+		txg_wait_synced(spa->spa_dsl_pool, txg);
+
+	if (vd != NULL) {
+		ASSERT(!vd->vdev_detached || vd->vdev_dtl_smo.smo_object == 0);
+		spa_config_enter(spa, SCL_ALL, spa, RW_WRITER);
+		vdev_free(vd);
+		spa_config_exit(spa, SCL_ALL, spa);
+	}
+
+	/*
+	 * If the config changed, update the config cache.
+	 */
+	if (config_changed)
+		spa_config_sync(spa, B_FALSE, B_TRUE);
+}
+
+/*
+ * Unlock the spa_t after adding or removing a vdev.  Besides undoing the
+ * locking of spa_vdev_enter(), we also want make sure the transactions have
+ * synced to disk, and then update the global configuration cache with the new
+ * information.
+ */
+int
+spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error)
+{
+	spa_vdev_config_exit(spa, vd, txg, error, FTAG);
+	mutex_exit(&spa_namespace_lock);
+	mutex_exit(&spa->spa_vdev_top_lock);
+
+	return (error);
+}
+
+/*
+ * Lock the given spa_t for the purpose of changing vdev state.
+ */
+void
+spa_vdev_state_enter(spa_t *spa, int oplocks)
+{
+	int locks = SCL_STATE_ALL | oplocks;
+
+	/*
+	 * Root pools may need to read of the underlying devfs filesystem
+	 * when opening up a vdev.  Unfortunately if we're holding the
+	 * SCL_ZIO lock it will result in a deadlock when we try to issue
+	 * the read from the root filesystem.  Instead we "prefetch"
+	 * the associated vnodes that we need prior to opening the
+	 * underlying devices and cache them so that we can prevent
+	 * any I/O when we are doing the actual open.
+	 */
+	if (spa_is_root(spa)) {
+		int low = locks & ~(SCL_ZIO - 1);
+		int high = locks & ~low;
+
+		spa_config_enter(spa, high, spa, RW_WRITER);
+		vdev_hold(spa->spa_root_vdev);
+		spa_config_enter(spa, low, spa, RW_WRITER);
+	} else {
+		spa_config_enter(spa, locks, spa, RW_WRITER);
+	}
+	spa->spa_vdev_locks = locks;
+}
+
+int
+spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error)
+{
+	boolean_t config_changed = B_FALSE;
+
+	if (vd != NULL || error == 0)
+		vdev_dtl_reassess(vd ? vd->vdev_top : spa->spa_root_vdev,
+		    0, 0, B_FALSE);
+
+	if (vd != NULL) {
+		vdev_state_dirty(vd->vdev_top);
+		config_changed = B_TRUE;
+		spa->spa_config_generation++;
+	}
+
+	if (spa_is_root(spa))
+		vdev_rele(spa->spa_root_vdev);
+
+	ASSERT3U(spa->spa_vdev_locks, >=, SCL_STATE_ALL);
+	spa_config_exit(spa, spa->spa_vdev_locks, spa);
+
+	/*
+	 * If anything changed, wait for it to sync.  This ensures that,
+	 * from the system administrator's perspective, zpool(1M) commands
+	 * are synchronous.  This is important for things like zpool offline:
+	 * when the command completes, you expect no further I/O from ZFS.
+	 */
+	if (vd != NULL)
+		txg_wait_synced(spa->spa_dsl_pool, 0);
+
+	/*
+	 * If the config changed, update the config cache.
+	 */
+	if (config_changed) {
+		mutex_enter(&spa_namespace_lock);
+		spa_config_sync(spa, B_FALSE, B_TRUE);
+		mutex_exit(&spa_namespace_lock);
+	}
+
+	return (error);
+}
+
+/*
+ * ==========================================================================
+ * Miscellaneous functions
+ * ==========================================================================
+ */
+
+/*
+ * Rename a spa_t.
+ */
+int
+spa_rename(const char *name, const char *newname)
+{
+	spa_t *spa;
+	int err;
+
+	/*
+	 * Lookup the spa_t and grab the config lock for writing.  We need to
+	 * actually open the pool so that we can sync out the necessary labels.
+	 * It's OK to call spa_open() with the namespace lock held because we
+	 * allow recursive calls for other reasons.
+	 */
+	mutex_enter(&spa_namespace_lock);
+	if ((err = spa_open(name, &spa, FTAG)) != 0) {
+		mutex_exit(&spa_namespace_lock);
+		return (err);
+	}
+
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+
+	avl_remove(&spa_namespace_avl, spa);
+	(void) strlcpy(spa->spa_name, newname, sizeof (spa->spa_name));
+	avl_add(&spa_namespace_avl, spa);
+
+	/*
+	 * Sync all labels to disk with the new names by marking the root vdev
+	 * dirty and waiting for it to sync.  It will pick up the new pool name
+	 * during the sync.
+	 */
+	vdev_config_dirty(spa->spa_root_vdev);
+
+	spa_config_exit(spa, SCL_ALL, FTAG);
+
+	txg_wait_synced(spa->spa_dsl_pool, 0);
+
+	/*
+	 * Sync the updated config cache.
+	 */
+	spa_config_sync(spa, B_FALSE, B_TRUE);
+
+	spa_close(spa, FTAG);
+
+	mutex_exit(&spa_namespace_lock);
+
+	return (0);
+}
+
+/*
+ * Return the spa_t associated with given pool_guid, if it exists.  If
+ * device_guid is non-zero, determine whether the pool exists *and* contains
+ * a device with the specified device_guid.
+ */
+spa_t *
+spa_by_guid(uint64_t pool_guid, uint64_t device_guid)
+{
+	spa_t *spa;
+	avl_tree_t *t = &spa_namespace_avl;
+
+	ASSERT(MUTEX_HELD(&spa_namespace_lock));
+
+	for (spa = avl_first(t); spa != NULL; spa = AVL_NEXT(t, spa)) {
+		if (spa->spa_state == POOL_STATE_UNINITIALIZED)
+			continue;
+		if (spa->spa_root_vdev == NULL)
+			continue;
+		if (spa_guid(spa) == pool_guid) {
+			if (device_guid == 0)
+				break;
+
+			if (vdev_lookup_by_guid(spa->spa_root_vdev,
+			    device_guid) != NULL)
+				break;
+
+			/*
+			 * Check any devices we may be in the process of adding.
+			 */
+			if (spa->spa_pending_vdev) {
+				if (vdev_lookup_by_guid(spa->spa_pending_vdev,
+				    device_guid) != NULL)
+					break;
+			}
+		}
+	}
+
+	return (spa);
+}
+
+/*
+ * Determine whether a pool with the given pool_guid exists.
+ */
+boolean_t
+spa_guid_exists(uint64_t pool_guid, uint64_t device_guid)
+{
+	return (spa_by_guid(pool_guid, device_guid) != NULL);
+}
+
+char *
+spa_strdup(const char *s)
+{
+	size_t len;
+	char *new;
+
+	len = strlen(s);
+	new = kmem_alloc(len + 1, KM_SLEEP);
+	bcopy(s, new, len);
+	new[len] = '\0';
+
+	return (new);
+}
+
+void
+spa_strfree(char *s)
+{
+	kmem_free(s, strlen(s) + 1);
+}
+
+uint64_t
+spa_get_random(uint64_t range)
+{
+	uint64_t r;
+
+	ASSERT(range != 0);
+
+	(void) random_get_pseudo_bytes((void *)&r, sizeof (uint64_t));
+
+	return (r % range);
+}
+
+uint64_t
+spa_generate_guid(spa_t *spa)
+{
+	uint64_t guid = spa_get_random(-1ULL);
+
+	if (spa != NULL) {
+		while (guid == 0 || spa_guid_exists(spa_guid(spa), guid))
+			guid = spa_get_random(-1ULL);
+	} else {
+		while (guid == 0 || spa_guid_exists(guid, 0))
+			guid = spa_get_random(-1ULL);
+	}
+
+	return (guid);
+}
+
+void
+sprintf_blkptr(char *buf, const blkptr_t *bp)
+{
+	char *type = NULL;
+	char *checksum = NULL;
+	char *compress = NULL;
+
+	if (bp != NULL) {
+		type = dmu_ot[BP_GET_TYPE(bp)].ot_name;
+		checksum = zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name;
+		compress = zio_compress_table[BP_GET_COMPRESS(bp)].ci_name;
+	}
+
+	SPRINTF_BLKPTR(snprintf, ' ', buf, bp, type, checksum, compress);
+}
+
+void
+spa_freeze(spa_t *spa)
+{
+	uint64_t freeze_txg = 0;
+
+	spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+	if (spa->spa_freeze_txg == UINT64_MAX) {
+		freeze_txg = spa_last_synced_txg(spa) + TXG_SIZE;
+		spa->spa_freeze_txg = freeze_txg;
+	}
+	spa_config_exit(spa, SCL_ALL, FTAG);
+	if (freeze_txg != 0)
+		txg_wait_synced(spa_get_dsl(spa), freeze_txg);
+}
+
+void
+zfs_panic_recover(const char *fmt, ...)
+{
+	va_list adx;
+
+	va_start(adx, fmt);
+	vcmn_err(zfs_recover ? CE_WARN : CE_PANIC, fmt, adx);
+	va_end(adx);
+}
+
+/*
+ * This is a stripped-down version of strtoull, suitable only for converting
+ * lowercase hexidecimal numbers that don't overflow.
+ */
+uint64_t
+strtonum(const char *str, char **nptr)
+{
+	uint64_t val = 0;
+	char c;
+	int digit;
+
+	while ((c = *str) != '\0') {
+		if (c >= '0' && c <= '9')
+			digit = c - '0';
+		else if (c >= 'a' && c <= 'f')
+			digit = 10 + c - 'a';
+		else
+			break;
+
+		val *= 16;
+		val += digit;
+
+		str++;
+	}
+
+	if (nptr)
+		*nptr = (char *)str;
+
+	return (val);
+}
+
+/*
+ * ==========================================================================
+ * Accessor functions
+ * ==========================================================================
+ */
+
+boolean_t
+spa_shutting_down(spa_t *spa)
+{
+	return (spa->spa_async_suspended);
+}
+
+dsl_pool_t *
+spa_get_dsl(spa_t *spa)
+{
+	return (spa->spa_dsl_pool);
+}
+
+blkptr_t *
+spa_get_rootblkptr(spa_t *spa)
+{
+	return (&spa->spa_ubsync.ub_rootbp);
+}
+
+void
+spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp)
+{
+	spa->spa_uberblock.ub_rootbp = *bp;
+}
+
+void
+spa_altroot(spa_t *spa, char *buf, size_t buflen)
+{
+	if (spa->spa_root == NULL)
+		buf[0] = '\0';
+	else
+		(void) strncpy(buf, spa->spa_root, buflen);
+}
+
+int
+spa_sync_pass(spa_t *spa)
+{
+	return (spa->spa_sync_pass);
+}
+
+char *
+spa_name(spa_t *spa)
+{
+	return (spa->spa_name);
+}
+
+uint64_t
+spa_guid(spa_t *spa)
+{
+	/*
+	 * If we fail to parse the config during spa_load(), we can go through
+	 * the error path (which posts an ereport) and end up here with no root
+	 * vdev.  We stash the original pool guid in 'spa_load_guid' to handle
+	 * this case.
+	 */
+	if (spa->spa_root_vdev != NULL)
+		return (spa->spa_root_vdev->vdev_guid);
+	else
+		return (spa->spa_load_guid);
+}
+
+uint64_t
+spa_last_synced_txg(spa_t *spa)
+{
+	return (spa->spa_ubsync.ub_txg);
+}
+
+uint64_t
+spa_first_txg(spa_t *spa)
+{
+	return (spa->spa_first_txg);
+}
+
+uint64_t
+spa_syncing_txg(spa_t *spa)
+{
+	return (spa->spa_syncing_txg);
+}
+
+pool_state_t
+spa_state(spa_t *spa)
+{
+	return (spa->spa_state);
+}
+
+spa_load_state_t
+spa_load_state(spa_t *spa)
+{
+	return (spa->spa_load_state);
+}
+
+uint64_t
+spa_freeze_txg(spa_t *spa)
+{
+	return (spa->spa_freeze_txg);
+}
+
+/* ARGSUSED */
+uint64_t
+spa_get_asize(spa_t *spa, uint64_t lsize)
+{
+	/*
+	 * The worst case is single-sector max-parity RAID-Z blocks, in which
+	 * case the space requirement is exactly (VDEV_RAIDZ_MAXPARITY + 1)
+	 * times the size; so just assume that.  Add to this the fact that
+	 * we can have up to 3 DVAs per bp, and one more factor of 2 because
+	 * the block may be dittoed with up to 3 DVAs by ddt_sync().
+	 */
+	return (lsize * (VDEV_RAIDZ_MAXPARITY + 1) * SPA_DVAS_PER_BP * 2);
+}
+
+uint64_t
+spa_get_dspace(spa_t *spa)
+{
+	return (spa->spa_dspace);
+}
+
+void
+spa_update_dspace(spa_t *spa)
+{
+	spa->spa_dspace = metaslab_class_get_dspace(spa_normal_class(spa)) +
+	    ddt_get_dedup_dspace(spa);
+}
+
+/*
+ * Return the failure mode that has been set to this pool. The default
+ * behavior will be to block all I/Os when a complete failure occurs.
+ */
+uint8_t
+spa_get_failmode(spa_t *spa)
+{
+	return (spa->spa_failmode);
+}
+
+boolean_t
+spa_suspended(spa_t *spa)
+{
+	return (spa->spa_suspended);
+}
+
+uint64_t
+spa_version(spa_t *spa)
+{
+	return (spa->spa_ubsync.ub_version);
+}
+
+boolean_t
+spa_deflate(spa_t *spa)
+{
+	return (spa->spa_deflate);
+}
+
+metaslab_class_t *
+spa_normal_class(spa_t *spa)
+{
+	return (spa->spa_normal_class);
+}
+
+metaslab_class_t *
+spa_log_class(spa_t *spa)
+{
+	return (spa->spa_log_class);
+}
+
+int
+spa_max_replication(spa_t *spa)
+{
+	/*
+	 * As of SPA_VERSION == SPA_VERSION_DITTO_BLOCKS, we are able to
+	 * handle BPs with more than one DVA allocated.  Set our max
+	 * replication level accordingly.
+	 */
+	if (spa_version(spa) < SPA_VERSION_DITTO_BLOCKS)
+		return (1);
+	return (MIN(SPA_DVAS_PER_BP, spa_max_replication_override));
+}
+
+int
+spa_prev_software_version(spa_t *spa)
+{
+	return (spa->spa_prev_software_version);
+}
+
+uint64_t
+dva_get_dsize_sync(spa_t *spa, const dva_t *dva)
+{
+	uint64_t asize = DVA_GET_ASIZE(dva);
+	uint64_t dsize = asize;
+
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0);
+
+	if (asize != 0 && spa->spa_deflate) {
+		vdev_t *vd = vdev_lookup_top(spa, DVA_GET_VDEV(dva));
+		dsize = (asize >> SPA_MINBLOCKSHIFT) * vd->vdev_deflate_ratio;
+	}
+
+	return (dsize);
+}
+
+uint64_t
+bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp)
+{
+	uint64_t dsize = 0;
+
+	for (int d = 0; d < SPA_DVAS_PER_BP; d++)
+		dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]);
+
+	return (dsize);
+}
+
+uint64_t
+bp_get_dsize(spa_t *spa, const blkptr_t *bp)
+{
+	uint64_t dsize = 0;
+
+	spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
+
+	for (int d = 0; d < SPA_DVAS_PER_BP; d++)
+		dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]);
+
+	spa_config_exit(spa, SCL_VDEV, FTAG);
+
+	return (dsize);
+}
+
+/*
+ * ==========================================================================
+ * Initialization and Termination
+ * ==========================================================================
+ */
+
+static int
+spa_name_compare(const void *a1, const void *a2)
+{
+	const spa_t *s1 = a1;
+	const spa_t *s2 = a2;
+	int s;
+
+	s = strcmp(s1->spa_name, s2->spa_name);
+	if (s > 0)
+		return (1);
+	if (s < 0)
+		return (-1);
+	return (0);
+}
+
+int
+spa_busy(void)
+{
+	return (spa_active_count);
+}
+
+void
+spa_boot_init()
+{
+	spa_config_load();
+}
+
+void
+spa_init(int mode)
+{
+	mutex_init(&spa_namespace_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&spa_spare_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&spa_l2cache_lock, NULL, MUTEX_DEFAULT, NULL);
+	cv_init(&spa_namespace_cv, NULL, CV_DEFAULT, NULL);
+
+	avl_create(&spa_namespace_avl, spa_name_compare, sizeof (spa_t),
+	    offsetof(spa_t, spa_avl));
+
+	avl_create(&spa_spare_avl, spa_spare_compare, sizeof (spa_aux_t),
+	    offsetof(spa_aux_t, aux_avl));
+
+	avl_create(&spa_l2cache_avl, spa_l2cache_compare, sizeof (spa_aux_t),
+	    offsetof(spa_aux_t, aux_avl));
+
+	spa_mode_global = mode;
+
+	refcount_init();
+	unique_init();
+	zio_init();
+	dmu_init();
+	zil_init();
+	vdev_cache_stat_init();
+	zfs_prop_init();
+	zpool_prop_init();
+	spa_config_load();
+	l2arc_start();
+}
+
+void
+spa_fini(void)
+{
+	l2arc_stop();
+
+	spa_evict_all();
+
+	vdev_cache_stat_fini();
+	zil_fini();
+	dmu_fini();
+	zio_fini();
+	unique_fini();
+	refcount_fini();
+
+	avl_destroy(&spa_namespace_avl);
+	avl_destroy(&spa_spare_avl);
+	avl_destroy(&spa_l2cache_avl);
+
+	cv_destroy(&spa_namespace_cv);
+	mutex_destroy(&spa_namespace_lock);
+	mutex_destroy(&spa_spare_lock);
+	mutex_destroy(&spa_l2cache_lock);
+}
+
+/*
+ * Return whether this pool has slogs. No locking needed.
+ * It's not a problem if the wrong answer is returned as it's only for
+ * performance and not correctness
+ */
+boolean_t
+spa_has_slogs(spa_t *spa)
+{
+	return (spa->spa_log_class->mc_rotor != NULL);
+}
+
+spa_log_state_t
+spa_get_log_state(spa_t *spa)
+{
+	return (spa->spa_log_state);
+}
+
+void
+spa_set_log_state(spa_t *spa, spa_log_state_t state)
+{
+	spa->spa_log_state = state;
+}
+
+boolean_t
+spa_is_root(spa_t *spa)
+{
+	return (spa->spa_is_root);
+}
+
+boolean_t
+spa_writeable(spa_t *spa)
+{
+	return (!!(spa->spa_mode & FWRITE));
+}
+
+int
+spa_mode(spa_t *spa)
+{
+	return (spa->spa_mode);
+}
+
+uint64_t
+spa_bootfs(spa_t *spa)
+{
+	return (spa->spa_bootfs);
+}
+
+uint64_t
+spa_delegation(spa_t *spa)
+{
+	return (spa->spa_delegation);
+}
+
+objset_t *
+spa_meta_objset(spa_t *spa)
+{
+	return (spa->spa_meta_objset);
+}
+
+enum zio_checksum
+spa_dedup_checksum(spa_t *spa)
+{
+	return (spa->spa_dedup_checksum);
+}
+
+/*
+ * Reset pool scan stat per scan pass (or reboot).
+ */
+void
+spa_scan_stat_init(spa_t *spa)
+{
+	/* data not stored on disk */
+	spa->spa_scan_pass_start = gethrestime_sec();
+	spa->spa_scan_pass_exam = 0;
+	vdev_scan_stat_init(spa->spa_root_vdev);
+}
+
+/*
+ * Get scan stats for zpool status reports
+ */
+int
+spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps)
+{
+	dsl_scan_t *scn = spa->spa_dsl_pool ? spa->spa_dsl_pool->dp_scan : NULL;
+
+	if (scn == NULL || scn->scn_phys.scn_func == POOL_SCAN_NONE)
+		return (ENOENT);
+	bzero(ps, sizeof (pool_scan_stat_t));
+
+	/* data stored on disk */
+	ps->pss_func = scn->scn_phys.scn_func;
+	ps->pss_start_time = scn->scn_phys.scn_start_time;
+	ps->pss_end_time = scn->scn_phys.scn_end_time;
+	ps->pss_to_examine = scn->scn_phys.scn_to_examine;
+	ps->pss_examined = scn->scn_phys.scn_examined;
+	ps->pss_to_process = scn->scn_phys.scn_to_process;
+	ps->pss_processed = scn->scn_phys.scn_processed;
+	ps->pss_errors = scn->scn_phys.scn_errors;
+	ps->pss_state = scn->scn_phys.scn_state;
+
+	/* data not stored on disk */
+	ps->pss_pass_start = spa->spa_scan_pass_start;
+	ps->pss_pass_exam = spa->spa_scan_pass_exam;
+
+	return (0);
+}
diff --git a/uts/common/fs/zfs/space_map.c b/uts/common/fs/zfs/space_map.c
new file mode 100644
index 000000000000..1ce7b2a3d466
--- /dev/null
+++ b/uts/common/fs/zfs/space_map.c
@@ -0,0 +1,616 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/dmu.h>
+#include <sys/zio.h>
+#include <sys/space_map.h>
+
+/*
+ * Space map routines.
+ * NOTE: caller is responsible for all locking.
+ */
+static int
+space_map_seg_compare(const void *x1, const void *x2)
+{
+	const space_seg_t *s1 = x1;
+	const space_seg_t *s2 = x2;
+
+	if (s1->ss_start < s2->ss_start) {
+		if (s1->ss_end > s2->ss_start)
+			return (0);
+		return (-1);
+	}
+	if (s1->ss_start > s2->ss_start) {
+		if (s1->ss_start < s2->ss_end)
+			return (0);
+		return (1);
+	}
+	return (0);
+}
+
+void
+space_map_create(space_map_t *sm, uint64_t start, uint64_t size, uint8_t shift,
+	kmutex_t *lp)
+{
+	bzero(sm, sizeof (*sm));
+
+	cv_init(&sm->sm_load_cv, NULL, CV_DEFAULT, NULL);
+
+	avl_create(&sm->sm_root, space_map_seg_compare,
+	    sizeof (space_seg_t), offsetof(struct space_seg, ss_node));
+
+	sm->sm_start = start;
+	sm->sm_size = size;
+	sm->sm_shift = shift;
+	sm->sm_lock = lp;
+}
+
+void
+space_map_destroy(space_map_t *sm)
+{
+	ASSERT(!sm->sm_loaded && !sm->sm_loading);
+	VERIFY3U(sm->sm_space, ==, 0);
+	avl_destroy(&sm->sm_root);
+	cv_destroy(&sm->sm_load_cv);
+}
+
+void
+space_map_add(space_map_t *sm, uint64_t start, uint64_t size)
+{
+	avl_index_t where;
+	space_seg_t ssearch, *ss_before, *ss_after, *ss;
+	uint64_t end = start + size;
+	int merge_before, merge_after;
+
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+	VERIFY(size != 0);
+	VERIFY3U(start, >=, sm->sm_start);
+	VERIFY3U(end, <=, sm->sm_start + sm->sm_size);
+	VERIFY(sm->sm_space + size <= sm->sm_size);
+	VERIFY(P2PHASE(start, 1ULL << sm->sm_shift) == 0);
+	VERIFY(P2PHASE(size, 1ULL << sm->sm_shift) == 0);
+
+	ssearch.ss_start = start;
+	ssearch.ss_end = end;
+	ss = avl_find(&sm->sm_root, &ssearch, &where);
+
+	if (ss != NULL && ss->ss_start <= start && ss->ss_end >= end) {
+		zfs_panic_recover("zfs: allocating allocated segment"
+		    "(offset=%llu size=%llu)\n",
+		    (longlong_t)start, (longlong_t)size);
+		return;
+	}
+
+	/* Make sure we don't overlap with either of our neighbors */
+	VERIFY(ss == NULL);
+
+	ss_before = avl_nearest(&sm->sm_root, where, AVL_BEFORE);
+	ss_after = avl_nearest(&sm->sm_root, where, AVL_AFTER);
+
+	merge_before = (ss_before != NULL && ss_before->ss_end == start);
+	merge_after = (ss_after != NULL && ss_after->ss_start == end);
+
+	if (merge_before && merge_after) {
+		avl_remove(&sm->sm_root, ss_before);
+		if (sm->sm_pp_root) {
+			avl_remove(sm->sm_pp_root, ss_before);
+			avl_remove(sm->sm_pp_root, ss_after);
+		}
+		ss_after->ss_start = ss_before->ss_start;
+		kmem_free(ss_before, sizeof (*ss_before));
+		ss = ss_after;
+	} else if (merge_before) {
+		ss_before->ss_end = end;
+		if (sm->sm_pp_root)
+			avl_remove(sm->sm_pp_root, ss_before);
+		ss = ss_before;
+	} else if (merge_after) {
+		ss_after->ss_start = start;
+		if (sm->sm_pp_root)
+			avl_remove(sm->sm_pp_root, ss_after);
+		ss = ss_after;
+	} else {
+		ss = kmem_alloc(sizeof (*ss), KM_SLEEP);
+		ss->ss_start = start;
+		ss->ss_end = end;
+		avl_insert(&sm->sm_root, ss, where);
+	}
+
+	if (sm->sm_pp_root)
+		avl_add(sm->sm_pp_root, ss);
+
+	sm->sm_space += size;
+}
+
+void
+space_map_remove(space_map_t *sm, uint64_t start, uint64_t size)
+{
+	avl_index_t where;
+	space_seg_t ssearch, *ss, *newseg;
+	uint64_t end = start + size;
+	int left_over, right_over;
+
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+	VERIFY(size != 0);
+	VERIFY(P2PHASE(start, 1ULL << sm->sm_shift) == 0);
+	VERIFY(P2PHASE(size, 1ULL << sm->sm_shift) == 0);
+
+	ssearch.ss_start = start;
+	ssearch.ss_end = end;
+	ss = avl_find(&sm->sm_root, &ssearch, &where);
+
+	/* Make sure we completely overlap with someone */
+	if (ss == NULL) {
+		zfs_panic_recover("zfs: freeing free segment "
+		    "(offset=%llu size=%llu)",
+		    (longlong_t)start, (longlong_t)size);
+		return;
+	}
+	VERIFY3U(ss->ss_start, <=, start);
+	VERIFY3U(ss->ss_end, >=, end);
+	VERIFY(sm->sm_space - size <= sm->sm_size);
+
+	left_over = (ss->ss_start != start);
+	right_over = (ss->ss_end != end);
+
+	if (sm->sm_pp_root)
+		avl_remove(sm->sm_pp_root, ss);
+
+	if (left_over && right_over) {
+		newseg = kmem_alloc(sizeof (*newseg), KM_SLEEP);
+		newseg->ss_start = end;
+		newseg->ss_end = ss->ss_end;
+		ss->ss_end = start;
+		avl_insert_here(&sm->sm_root, newseg, ss, AVL_AFTER);
+		if (sm->sm_pp_root)
+			avl_add(sm->sm_pp_root, newseg);
+	} else if (left_over) {
+		ss->ss_end = start;
+	} else if (right_over) {
+		ss->ss_start = end;
+	} else {
+		avl_remove(&sm->sm_root, ss);
+		kmem_free(ss, sizeof (*ss));
+		ss = NULL;
+	}
+
+	if (sm->sm_pp_root && ss != NULL)
+		avl_add(sm->sm_pp_root, ss);
+
+	sm->sm_space -= size;
+}
+
+boolean_t
+space_map_contains(space_map_t *sm, uint64_t start, uint64_t size)
+{
+	avl_index_t where;
+	space_seg_t ssearch, *ss;
+	uint64_t end = start + size;
+
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+	VERIFY(size != 0);
+	VERIFY(P2PHASE(start, 1ULL << sm->sm_shift) == 0);
+	VERIFY(P2PHASE(size, 1ULL << sm->sm_shift) == 0);
+
+	ssearch.ss_start = start;
+	ssearch.ss_end = end;
+	ss = avl_find(&sm->sm_root, &ssearch, &where);
+
+	return (ss != NULL && ss->ss_start <= start && ss->ss_end >= end);
+}
+
+void
+space_map_vacate(space_map_t *sm, space_map_func_t *func, space_map_t *mdest)
+{
+	space_seg_t *ss;
+	void *cookie = NULL;
+
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+
+	while ((ss = avl_destroy_nodes(&sm->sm_root, &cookie)) != NULL) {
+		if (func != NULL)
+			func(mdest, ss->ss_start, ss->ss_end - ss->ss_start);
+		kmem_free(ss, sizeof (*ss));
+	}
+	sm->sm_space = 0;
+}
+
+void
+space_map_walk(space_map_t *sm, space_map_func_t *func, space_map_t *mdest)
+{
+	space_seg_t *ss;
+
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+
+	for (ss = avl_first(&sm->sm_root); ss; ss = AVL_NEXT(&sm->sm_root, ss))
+		func(mdest, ss->ss_start, ss->ss_end - ss->ss_start);
+}
+
+/*
+ * Wait for any in-progress space_map_load() to complete.
+ */
+void
+space_map_load_wait(space_map_t *sm)
+{
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+
+	while (sm->sm_loading) {
+		ASSERT(!sm->sm_loaded);
+		cv_wait(&sm->sm_load_cv, sm->sm_lock);
+	}
+}
+
+/*
+ * Note: space_map_load() will drop sm_lock across dmu_read() calls.
+ * The caller must be OK with this.
+ */
+int
+space_map_load(space_map_t *sm, space_map_ops_t *ops, uint8_t maptype,
+	space_map_obj_t *smo, objset_t *os)
+{
+	uint64_t *entry, *entry_map, *entry_map_end;
+	uint64_t bufsize, size, offset, end, space;
+	uint64_t mapstart = sm->sm_start;
+	int error = 0;
+
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+	ASSERT(!sm->sm_loaded);
+	ASSERT(!sm->sm_loading);
+
+	sm->sm_loading = B_TRUE;
+	end = smo->smo_objsize;
+	space = smo->smo_alloc;
+
+	ASSERT(sm->sm_ops == NULL);
+	VERIFY3U(sm->sm_space, ==, 0);
+
+	if (maptype == SM_FREE) {
+		space_map_add(sm, sm->sm_start, sm->sm_size);
+		space = sm->sm_size - space;
+	}
+
+	bufsize = 1ULL << SPACE_MAP_BLOCKSHIFT;
+	entry_map = zio_buf_alloc(bufsize);
+
+	mutex_exit(sm->sm_lock);
+	if (end > bufsize)
+		dmu_prefetch(os, smo->smo_object, bufsize, end - bufsize);
+	mutex_enter(sm->sm_lock);
+
+	for (offset = 0; offset < end; offset += bufsize) {
+		size = MIN(end - offset, bufsize);
+		VERIFY(P2PHASE(size, sizeof (uint64_t)) == 0);
+		VERIFY(size != 0);
+
+		dprintf("object=%llu  offset=%llx  size=%llx\n",
+		    smo->smo_object, offset, size);
+
+		mutex_exit(sm->sm_lock);
+		error = dmu_read(os, smo->smo_object, offset, size, entry_map,
+		    DMU_READ_PREFETCH);
+		mutex_enter(sm->sm_lock);
+		if (error != 0)
+			break;
+
+		entry_map_end = entry_map + (size / sizeof (uint64_t));
+		for (entry = entry_map; entry < entry_map_end; entry++) {
+			uint64_t e = *entry;
+
+			if (SM_DEBUG_DECODE(e))		/* Skip debug entries */
+				continue;
+
+			(SM_TYPE_DECODE(e) == maptype ?
+			    space_map_add : space_map_remove)(sm,
+			    (SM_OFFSET_DECODE(e) << sm->sm_shift) + mapstart,
+			    SM_RUN_DECODE(e) << sm->sm_shift);
+		}
+	}
+
+	if (error == 0) {
+		VERIFY3U(sm->sm_space, ==, space);
+
+		sm->sm_loaded = B_TRUE;
+		sm->sm_ops = ops;
+		if (ops != NULL)
+			ops->smop_load(sm);
+	} else {
+		space_map_vacate(sm, NULL, NULL);
+	}
+
+	zio_buf_free(entry_map, bufsize);
+
+	sm->sm_loading = B_FALSE;
+
+	cv_broadcast(&sm->sm_load_cv);
+
+	return (error);
+}
+
+void
+space_map_unload(space_map_t *sm)
+{
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+
+	if (sm->sm_loaded && sm->sm_ops != NULL)
+		sm->sm_ops->smop_unload(sm);
+
+	sm->sm_loaded = B_FALSE;
+	sm->sm_ops = NULL;
+
+	space_map_vacate(sm, NULL, NULL);
+}
+
+uint64_t
+space_map_maxsize(space_map_t *sm)
+{
+	ASSERT(sm->sm_ops != NULL);
+	return (sm->sm_ops->smop_max(sm));
+}
+
+uint64_t
+space_map_alloc(space_map_t *sm, uint64_t size)
+{
+	uint64_t start;
+
+	start = sm->sm_ops->smop_alloc(sm, size);
+	if (start != -1ULL)
+		space_map_remove(sm, start, size);
+	return (start);
+}
+
+void
+space_map_claim(space_map_t *sm, uint64_t start, uint64_t size)
+{
+	sm->sm_ops->smop_claim(sm, start, size);
+	space_map_remove(sm, start, size);
+}
+
+void
+space_map_free(space_map_t *sm, uint64_t start, uint64_t size)
+{
+	space_map_add(sm, start, size);
+	sm->sm_ops->smop_free(sm, start, size);
+}
+
+/*
+ * Note: space_map_sync() will drop sm_lock across dmu_write() calls.
+ */
+void
+space_map_sync(space_map_t *sm, uint8_t maptype,
+	space_map_obj_t *smo, objset_t *os, dmu_tx_t *tx)
+{
+	spa_t *spa = dmu_objset_spa(os);
+	void *cookie = NULL;
+	space_seg_t *ss;
+	uint64_t bufsize, start, size, run_len;
+	uint64_t *entry, *entry_map, *entry_map_end;
+
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+
+	if (sm->sm_space == 0)
+		return;
+
+	dprintf("object %4llu, txg %llu, pass %d, %c, count %lu, space %llx\n",
+	    smo->smo_object, dmu_tx_get_txg(tx), spa_sync_pass(spa),
+	    maptype == SM_ALLOC ? 'A' : 'F', avl_numnodes(&sm->sm_root),
+	    sm->sm_space);
+
+	if (maptype == SM_ALLOC)
+		smo->smo_alloc += sm->sm_space;
+	else
+		smo->smo_alloc -= sm->sm_space;
+
+	bufsize = (8 + avl_numnodes(&sm->sm_root)) * sizeof (uint64_t);
+	bufsize = MIN(bufsize, 1ULL << SPACE_MAP_BLOCKSHIFT);
+	entry_map = zio_buf_alloc(bufsize);
+	entry_map_end = entry_map + (bufsize / sizeof (uint64_t));
+	entry = entry_map;
+
+	*entry++ = SM_DEBUG_ENCODE(1) |
+	    SM_DEBUG_ACTION_ENCODE(maptype) |
+	    SM_DEBUG_SYNCPASS_ENCODE(spa_sync_pass(spa)) |
+	    SM_DEBUG_TXG_ENCODE(dmu_tx_get_txg(tx));
+
+	while ((ss = avl_destroy_nodes(&sm->sm_root, &cookie)) != NULL) {
+		size = ss->ss_end - ss->ss_start;
+		start = (ss->ss_start - sm->sm_start) >> sm->sm_shift;
+
+		sm->sm_space -= size;
+		size >>= sm->sm_shift;
+
+		while (size) {
+			run_len = MIN(size, SM_RUN_MAX);
+
+			if (entry == entry_map_end) {
+				mutex_exit(sm->sm_lock);
+				dmu_write(os, smo->smo_object, smo->smo_objsize,
+				    bufsize, entry_map, tx);
+				mutex_enter(sm->sm_lock);
+				smo->smo_objsize += bufsize;
+				entry = entry_map;
+			}
+
+			*entry++ = SM_OFFSET_ENCODE(start) |
+			    SM_TYPE_ENCODE(maptype) |
+			    SM_RUN_ENCODE(run_len);
+
+			start += run_len;
+			size -= run_len;
+		}
+		kmem_free(ss, sizeof (*ss));
+	}
+
+	if (entry != entry_map) {
+		size = (entry - entry_map) * sizeof (uint64_t);
+		mutex_exit(sm->sm_lock);
+		dmu_write(os, smo->smo_object, smo->smo_objsize,
+		    size, entry_map, tx);
+		mutex_enter(sm->sm_lock);
+		smo->smo_objsize += size;
+	}
+
+	zio_buf_free(entry_map, bufsize);
+
+	VERIFY3U(sm->sm_space, ==, 0);
+}
+
+void
+space_map_truncate(space_map_obj_t *smo, objset_t *os, dmu_tx_t *tx)
+{
+	VERIFY(dmu_free_range(os, smo->smo_object, 0, -1ULL, tx) == 0);
+
+	smo->smo_objsize = 0;
+	smo->smo_alloc = 0;
+}
+
+/*
+ * Space map reference trees.
+ *
+ * A space map is a collection of integers.  Every integer is either
+ * in the map, or it's not.  A space map reference tree generalizes
+ * the idea: it allows its members to have arbitrary reference counts,
+ * as opposed to the implicit reference count of 0 or 1 in a space map.
+ * This representation comes in handy when computing the union or
+ * intersection of multiple space maps.  For example, the union of
+ * N space maps is the subset of the reference tree with refcnt >= 1.
+ * The intersection of N space maps is the subset with refcnt >= N.
+ *
+ * [It's very much like a Fourier transform.  Unions and intersections
+ * are hard to perform in the 'space map domain', so we convert the maps
+ * into the 'reference count domain', where it's trivial, then invert.]
+ *
+ * vdev_dtl_reassess() uses computations of this form to determine
+ * DTL_MISSING and DTL_OUTAGE for interior vdevs -- e.g. a RAID-Z vdev
+ * has an outage wherever refcnt >= vdev_nparity + 1, and a mirror vdev
+ * has an outage wherever refcnt >= vdev_children.
+ */
+static int
+space_map_ref_compare(const void *x1, const void *x2)
+{
+	const space_ref_t *sr1 = x1;
+	const space_ref_t *sr2 = x2;
+
+	if (sr1->sr_offset < sr2->sr_offset)
+		return (-1);
+	if (sr1->sr_offset > sr2->sr_offset)
+		return (1);
+
+	if (sr1 < sr2)
+		return (-1);
+	if (sr1 > sr2)
+		return (1);
+
+	return (0);
+}
+
+void
+space_map_ref_create(avl_tree_t *t)
+{
+	avl_create(t, space_map_ref_compare,
+	    sizeof (space_ref_t), offsetof(space_ref_t, sr_node));
+}
+
+void
+space_map_ref_destroy(avl_tree_t *t)
+{
+	space_ref_t *sr;
+	void *cookie = NULL;
+
+	while ((sr = avl_destroy_nodes(t, &cookie)) != NULL)
+		kmem_free(sr, sizeof (*sr));
+
+	avl_destroy(t);
+}
+
+static void
+space_map_ref_add_node(avl_tree_t *t, uint64_t offset, int64_t refcnt)
+{
+	space_ref_t *sr;
+
+	sr = kmem_alloc(sizeof (*sr), KM_SLEEP);
+	sr->sr_offset = offset;
+	sr->sr_refcnt = refcnt;
+
+	avl_add(t, sr);
+}
+
+void
+space_map_ref_add_seg(avl_tree_t *t, uint64_t start, uint64_t end,
+	int64_t refcnt)
+{
+	space_map_ref_add_node(t, start, refcnt);
+	space_map_ref_add_node(t, end, -refcnt);
+}
+
+/*
+ * Convert (or add) a space map into a reference tree.
+ */
+void
+space_map_ref_add_map(avl_tree_t *t, space_map_t *sm, int64_t refcnt)
+{
+	space_seg_t *ss;
+
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+
+	for (ss = avl_first(&sm->sm_root); ss; ss = AVL_NEXT(&sm->sm_root, ss))
+		space_map_ref_add_seg(t, ss->ss_start, ss->ss_end, refcnt);
+}
+
+/*
+ * Convert a reference tree into a space map.  The space map will contain
+ * all members of the reference tree for which refcnt >= minref.
+ */
+void
+space_map_ref_generate_map(avl_tree_t *t, space_map_t *sm, int64_t minref)
+{
+	uint64_t start = -1ULL;
+	int64_t refcnt = 0;
+	space_ref_t *sr;
+
+	ASSERT(MUTEX_HELD(sm->sm_lock));
+
+	space_map_vacate(sm, NULL, NULL);
+
+	for (sr = avl_first(t); sr != NULL; sr = AVL_NEXT(t, sr)) {
+		refcnt += sr->sr_refcnt;
+		if (refcnt >= minref) {
+			if (start == -1ULL) {
+				start = sr->sr_offset;
+			}
+		} else {
+			if (start != -1ULL) {
+				uint64_t end = sr->sr_offset;
+				ASSERT(start <= end);
+				if (end > start)
+					space_map_add(sm, start, end - start);
+				start = -1ULL;
+			}
+		}
+	}
+	ASSERT(refcnt == 0);
+	ASSERT(start == -1ULL);
+}
diff --git a/uts/common/fs/zfs/sys/arc.h b/uts/common/fs/zfs/sys/arc.h
new file mode 100644
index 000000000000..8f189c62d31d
--- /dev/null
+++ b/uts/common/fs/zfs/sys/arc.h
@@ -0,0 +1,142 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_ARC_H
+#define	_SYS_ARC_H
+
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#include <sys/zio.h>
+#include <sys/dmu.h>
+#include <sys/spa.h>
+
+typedef struct arc_buf_hdr arc_buf_hdr_t;
+typedef struct arc_buf arc_buf_t;
+typedef void arc_done_func_t(zio_t *zio, arc_buf_t *buf, void *private);
+typedef int arc_evict_func_t(void *private);
+
+/* generic arc_done_func_t's which you can use */
+arc_done_func_t arc_bcopy_func;
+arc_done_func_t arc_getbuf_func;
+
+struct arc_buf {
+	arc_buf_hdr_t		*b_hdr;
+	arc_buf_t		*b_next;
+	kmutex_t		b_evict_lock;
+	krwlock_t		b_data_lock;
+	void			*b_data;
+	arc_evict_func_t	*b_efunc;
+	void			*b_private;
+};
+
+typedef enum arc_buf_contents {
+	ARC_BUFC_DATA,				/* buffer contains data */
+	ARC_BUFC_METADATA,			/* buffer contains metadata */
+	ARC_BUFC_NUMTYPES
+} arc_buf_contents_t;
+/*
+ * These are the flags we pass into calls to the arc
+ */
+#define	ARC_WAIT	(1 << 1)	/* perform I/O synchronously */
+#define	ARC_NOWAIT	(1 << 2)	/* perform I/O asynchronously */
+#define	ARC_PREFETCH	(1 << 3)	/* I/O is a prefetch */
+#define	ARC_CACHED	(1 << 4)	/* I/O was already in cache */
+#define	ARC_L2CACHE	(1 << 5)	/* cache in L2ARC */
+
+/*
+ * The following breakdows of arc_size exist for kstat only.
+ */
+typedef enum arc_space_type {
+	ARC_SPACE_DATA,
+	ARC_SPACE_HDRS,
+	ARC_SPACE_L2HDRS,
+	ARC_SPACE_OTHER,
+	ARC_SPACE_NUMTYPES
+} arc_space_type_t;
+
+void arc_space_consume(uint64_t space, arc_space_type_t type);
+void arc_space_return(uint64_t space, arc_space_type_t type);
+void *arc_data_buf_alloc(uint64_t space);
+void arc_data_buf_free(void *buf, uint64_t space);
+arc_buf_t *arc_buf_alloc(spa_t *spa, int size, void *tag,
+    arc_buf_contents_t type);
+arc_buf_t *arc_loan_buf(spa_t *spa, int size);
+void arc_return_buf(arc_buf_t *buf, void *tag);
+void arc_loan_inuse_buf(arc_buf_t *buf, void *tag);
+void arc_buf_add_ref(arc_buf_t *buf, void *tag);
+int arc_buf_remove_ref(arc_buf_t *buf, void *tag);
+int arc_buf_size(arc_buf_t *buf);
+void arc_release(arc_buf_t *buf, void *tag);
+int arc_release_bp(arc_buf_t *buf, void *tag, blkptr_t *bp, spa_t *spa,
+    zbookmark_t *zb);
+int arc_released(arc_buf_t *buf);
+int arc_has_callback(arc_buf_t *buf);
+void arc_buf_freeze(arc_buf_t *buf);
+void arc_buf_thaw(arc_buf_t *buf);
+#ifdef ZFS_DEBUG
+int arc_referenced(arc_buf_t *buf);
+#endif
+
+int arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, arc_buf_t *pbuf,
+    arc_done_func_t *done, void *private, int priority, int zio_flags,
+    uint32_t *arc_flags, const zbookmark_t *zb);
+int arc_read_nolock(zio_t *pio, spa_t *spa, const blkptr_t *bp,
+    arc_done_func_t *done, void *private, int priority, int flags,
+    uint32_t *arc_flags, const zbookmark_t *zb);
+zio_t *arc_write(zio_t *pio, spa_t *spa, uint64_t txg,
+    blkptr_t *bp, arc_buf_t *buf, boolean_t l2arc, const zio_prop_t *zp,
+    arc_done_func_t *ready, arc_done_func_t *done, void *private,
+    int priority, int zio_flags, const zbookmark_t *zb);
+
+void arc_set_callback(arc_buf_t *buf, arc_evict_func_t *func, void *private);
+int arc_buf_evict(arc_buf_t *buf);
+
+void arc_flush(spa_t *spa);
+void arc_tempreserve_clear(uint64_t reserve);
+int arc_tempreserve_space(uint64_t reserve, uint64_t txg);
+
+void arc_init(void);
+void arc_fini(void);
+
+/*
+ * Level 2 ARC
+ */
+
+void l2arc_add_vdev(spa_t *spa, vdev_t *vd);
+void l2arc_remove_vdev(vdev_t *vd);
+boolean_t l2arc_vdev_present(vdev_t *vd);
+void l2arc_init(void);
+void l2arc_fini(void);
+void l2arc_start(void);
+void l2arc_stop(void);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_ARC_H */
diff --git a/uts/common/fs/zfs/sys/bplist.h b/uts/common/fs/zfs/sys/bplist.h
new file mode 100644
index 000000000000..471be9047ec2
--- /dev/null
+++ b/uts/common/fs/zfs/sys/bplist.h
@@ -0,0 +1,57 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_BPLIST_H
+#define	_SYS_BPLIST_H
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct bplist_entry {
+	blkptr_t	bpe_blk;
+	list_node_t	bpe_node;
+} bplist_entry_t;
+
+typedef struct bplist {
+	kmutex_t	bpl_lock;
+	list_t		bpl_list;
+} bplist_t;
+
+typedef int bplist_itor_t(void *arg, const blkptr_t *bp, dmu_tx_t *tx);
+
+void bplist_create(bplist_t *bpl);
+void bplist_destroy(bplist_t *bpl);
+void bplist_append(bplist_t *bpl, const blkptr_t *bp);
+void bplist_iterate(bplist_t *bpl, bplist_itor_t *func,
+    void *arg, dmu_tx_t *tx);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_BPLIST_H */
diff --git a/uts/common/fs/zfs/sys/bpobj.h b/uts/common/fs/zfs/sys/bpobj.h
new file mode 100644
index 000000000000..3771a9541aa7
--- /dev/null
+++ b/uts/common/fs/zfs/sys/bpobj.h
@@ -0,0 +1,91 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_BPOBJ_H
+#define	_SYS_BPOBJ_H
+
+#include <sys/dmu.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/zio.h>
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct bpobj_phys {
+	/*
+	 * This is the bonus buffer for the dead lists.  The object's
+	 * contents is an array of bpo_entries blkptr_t's, representing
+	 * a total of bpo_bytes physical space.
+	 */
+	uint64_t	bpo_num_blkptrs;
+	uint64_t	bpo_bytes;
+	uint64_t	bpo_comp;
+	uint64_t	bpo_uncomp;
+	uint64_t	bpo_subobjs;
+	uint64_t	bpo_num_subobjs;
+} bpobj_phys_t;
+
+#define	BPOBJ_SIZE_V0	(2 * sizeof (uint64_t))
+#define	BPOBJ_SIZE_V1	(4 * sizeof (uint64_t))
+
+typedef struct bpobj {
+	kmutex_t	bpo_lock;
+	objset_t	*bpo_os;
+	uint64_t	bpo_object;
+	int		bpo_epb;
+	uint8_t		bpo_havecomp;
+	uint8_t		bpo_havesubobj;
+	bpobj_phys_t	*bpo_phys;
+	dmu_buf_t	*bpo_dbuf;
+	dmu_buf_t	*bpo_cached_dbuf;
+} bpobj_t;
+
+typedef int bpobj_itor_t(void *arg, const blkptr_t *bp, dmu_tx_t *tx);
+
+uint64_t bpobj_alloc(objset_t *mos, int blocksize, dmu_tx_t *tx);
+void bpobj_free(objset_t *os, uint64_t obj, dmu_tx_t *tx);
+
+int bpobj_open(bpobj_t *bpo, objset_t *mos, uint64_t object);
+void bpobj_close(bpobj_t *bpo);
+
+int bpobj_iterate(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx);
+int bpobj_iterate_nofree(bpobj_t *bpo, bpobj_itor_t func, void *, dmu_tx_t *);
+int bpobj_iterate_dbg(bpobj_t *bpo, uint64_t *itorp, blkptr_t *bp);
+
+void bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx);
+void bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, dmu_tx_t *tx);
+
+int bpobj_space(bpobj_t *bpo,
+    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
+int bpobj_space_range(bpobj_t *bpo, uint64_t mintxg, uint64_t maxtxg,
+    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_BPOBJ_H */
diff --git a/uts/common/fs/zfs/sys/dbuf.h b/uts/common/fs/zfs/sys/dbuf.h
new file mode 100644
index 000000000000..cf1bbc030f45
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dbuf.h
@@ -0,0 +1,375 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_DBUF_H
+#define	_SYS_DBUF_H
+
+#include <sys/dmu.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/zio.h>
+#include <sys/arc.h>
+#include <sys/zfs_context.h>
+#include <sys/refcount.h>
+#include <sys/zrlock.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#define	IN_DMU_SYNC 2
+
+/*
+ * define flags for dbuf_read
+ */
+
+#define	DB_RF_MUST_SUCCEED	(1 << 0)
+#define	DB_RF_CANFAIL		(1 << 1)
+#define	DB_RF_HAVESTRUCT	(1 << 2)
+#define	DB_RF_NOPREFETCH	(1 << 3)
+#define	DB_RF_NEVERWAIT		(1 << 4)
+#define	DB_RF_CACHED		(1 << 5)
+
+/*
+ * The simplified state transition diagram for dbufs looks like:
+ *
+ *		+----> READ ----+
+ *		|		|
+ *		|		V
+ *  (alloc)-->UNCACHED	     CACHED-->EVICTING-->(free)
+ *		|		^	 ^
+ *		|		|	 |
+ *		+----> FILL ----+	 |
+ *		|			 |
+ *		|			 |
+ *		+--------> NOFILL -------+
+ */
+typedef enum dbuf_states {
+	DB_UNCACHED,
+	DB_FILL,
+	DB_NOFILL,
+	DB_READ,
+	DB_CACHED,
+	DB_EVICTING
+} dbuf_states_t;
+
+struct dnode;
+struct dmu_tx;
+
+/*
+ * level = 0 means the user data
+ * level = 1 means the single indirect block
+ * etc.
+ */
+
+struct dmu_buf_impl;
+
+typedef enum override_states {
+	DR_NOT_OVERRIDDEN,
+	DR_IN_DMU_SYNC,
+	DR_OVERRIDDEN
+} override_states_t;
+
+typedef struct dbuf_dirty_record {
+	/* link on our parents dirty list */
+	list_node_t dr_dirty_node;
+
+	/* transaction group this data will sync in */
+	uint64_t dr_txg;
+
+	/* zio of outstanding write IO */
+	zio_t *dr_zio;
+
+	/* pointer back to our dbuf */
+	struct dmu_buf_impl *dr_dbuf;
+
+	/* pointer to next dirty record */
+	struct dbuf_dirty_record *dr_next;
+
+	/* pointer to parent dirty record */
+	struct dbuf_dirty_record *dr_parent;
+
+	union dirty_types {
+		struct dirty_indirect {
+
+			/* protect access to list */
+			kmutex_t dr_mtx;
+
+			/* Our list of dirty children */
+			list_t dr_children;
+		} di;
+		struct dirty_leaf {
+
+			/*
+			 * dr_data is set when we dirty the buffer
+			 * so that we can retain the pointer even if it
+			 * gets COW'd in a subsequent transaction group.
+			 */
+			arc_buf_t *dr_data;
+			blkptr_t dr_overridden_by;
+			override_states_t dr_override_state;
+			uint8_t dr_copies;
+		} dl;
+	} dt;
+} dbuf_dirty_record_t;
+
+typedef struct dmu_buf_impl {
+	/*
+	 * The following members are immutable, with the exception of
+	 * db.db_data, which is protected by db_mtx.
+	 */
+
+	/* the publicly visible structure */
+	dmu_buf_t db;
+
+	/* the objset we belong to */
+	struct objset *db_objset;
+
+	/*
+	 * handle to safely access the dnode we belong to (NULL when evicted)
+	 */
+	struct dnode_handle *db_dnode_handle;
+
+	/*
+	 * our parent buffer; if the dnode points to us directly,
+	 * db_parent == db_dnode_handle->dnh_dnode->dn_dbuf
+	 * only accessed by sync thread ???
+	 * (NULL when evicted)
+	 * May change from NULL to non-NULL under the protection of db_mtx
+	 * (see dbuf_check_blkptr())
+	 */
+	struct dmu_buf_impl *db_parent;
+
+	/*
+	 * link for hash table of all dmu_buf_impl_t's
+	 */
+	struct dmu_buf_impl *db_hash_next;
+
+	/* our block number */
+	uint64_t db_blkid;
+
+	/*
+	 * Pointer to the blkptr_t which points to us. May be NULL if we
+	 * don't have one yet. (NULL when evicted)
+	 */
+	blkptr_t *db_blkptr;
+
+	/*
+	 * Our indirection level.  Data buffers have db_level==0.
+	 * Indirect buffers which point to data buffers have
+	 * db_level==1. etc.  Buffers which contain dnodes have
+	 * db_level==0, since the dnodes are stored in a file.
+	 */
+	uint8_t db_level;
+
+	/* db_mtx protects the members below */
+	kmutex_t db_mtx;
+
+	/*
+	 * Current state of the buffer
+	 */
+	dbuf_states_t db_state;
+
+	/*
+	 * Refcount accessed by dmu_buf_{hold,rele}.
+	 * If nonzero, the buffer can't be destroyed.
+	 * Protected by db_mtx.
+	 */
+	refcount_t db_holds;
+
+	/* buffer holding our data */
+	arc_buf_t *db_buf;
+
+	kcondvar_t db_changed;
+	dbuf_dirty_record_t *db_data_pending;
+
+	/* pointer to most recent dirty record for this buffer */
+	dbuf_dirty_record_t *db_last_dirty;
+
+	/*
+	 * Our link on the owner dnodes's dn_dbufs list.
+	 * Protected by its dn_dbufs_mtx.
+	 */
+	list_node_t db_link;
+
+	/* Data which is unique to data (leaf) blocks: */
+
+	/* stuff we store for the user (see dmu_buf_set_user) */
+	void *db_user_ptr;
+	void **db_user_data_ptr_ptr;
+	dmu_buf_evict_func_t *db_evict_func;
+
+	uint8_t db_immediate_evict;
+	uint8_t db_freed_in_flight;
+
+	uint8_t db_dirtycnt;
+} dmu_buf_impl_t;
+
+/* Note: the dbuf hash table is exposed only for the mdb module */
+#define	DBUF_MUTEXES 256
+#define	DBUF_HASH_MUTEX(h, idx) (&(h)->hash_mutexes[(idx) & (DBUF_MUTEXES-1)])
+typedef struct dbuf_hash_table {
+	uint64_t hash_table_mask;
+	dmu_buf_impl_t **hash_table;
+	kmutex_t hash_mutexes[DBUF_MUTEXES];
+} dbuf_hash_table_t;
+
+
+uint64_t dbuf_whichblock(struct dnode *di, uint64_t offset);
+
+dmu_buf_impl_t *dbuf_create_tlib(struct dnode *dn, char *data);
+void dbuf_create_bonus(struct dnode *dn);
+int dbuf_spill_set_blksz(dmu_buf_t *db, uint64_t blksz, dmu_tx_t *tx);
+void dbuf_spill_hold(struct dnode *dn, dmu_buf_impl_t **dbp, void *tag);
+
+void dbuf_rm_spill(struct dnode *dn, dmu_tx_t *tx);
+
+dmu_buf_impl_t *dbuf_hold(struct dnode *dn, uint64_t blkid, void *tag);
+dmu_buf_impl_t *dbuf_hold_level(struct dnode *dn, int level, uint64_t blkid,
+    void *tag);
+int dbuf_hold_impl(struct dnode *dn, uint8_t level, uint64_t blkid, int create,
+    void *tag, dmu_buf_impl_t **dbp);
+
+void dbuf_prefetch(struct dnode *dn, uint64_t blkid);
+
+void dbuf_add_ref(dmu_buf_impl_t *db, void *tag);
+uint64_t dbuf_refcount(dmu_buf_impl_t *db);
+
+void dbuf_rele(dmu_buf_impl_t *db, void *tag);
+void dbuf_rele_and_unlock(dmu_buf_impl_t *db, void *tag);
+
+dmu_buf_impl_t *dbuf_find(struct dnode *dn, uint8_t level, uint64_t blkid);
+
+int dbuf_read(dmu_buf_impl_t *db, zio_t *zio, uint32_t flags);
+void dbuf_will_dirty(dmu_buf_impl_t *db, dmu_tx_t *tx);
+void dbuf_fill_done(dmu_buf_impl_t *db, dmu_tx_t *tx);
+void dmu_buf_will_not_fill(dmu_buf_t *db, dmu_tx_t *tx);
+void dmu_buf_will_fill(dmu_buf_t *db, dmu_tx_t *tx);
+void dmu_buf_fill_done(dmu_buf_t *db, dmu_tx_t *tx);
+void dbuf_assign_arcbuf(dmu_buf_impl_t *db, arc_buf_t *buf, dmu_tx_t *tx);
+dbuf_dirty_record_t *dbuf_dirty(dmu_buf_impl_t *db, dmu_tx_t *tx);
+arc_buf_t *dbuf_loan_arcbuf(dmu_buf_impl_t *db);
+
+void dbuf_clear(dmu_buf_impl_t *db);
+void dbuf_evict(dmu_buf_impl_t *db);
+
+void dbuf_setdirty(dmu_buf_impl_t *db, dmu_tx_t *tx);
+void dbuf_unoverride(dbuf_dirty_record_t *dr);
+void dbuf_sync_list(list_t *list, dmu_tx_t *tx);
+void dbuf_release_bp(dmu_buf_impl_t *db);
+
+void dbuf_free_range(struct dnode *dn, uint64_t start, uint64_t end,
+    struct dmu_tx *);
+
+void dbuf_new_size(dmu_buf_impl_t *db, int size, dmu_tx_t *tx);
+
+#define	DB_DNODE(_db)		((_db)->db_dnode_handle->dnh_dnode)
+#define	DB_DNODE_LOCK(_db)	((_db)->db_dnode_handle->dnh_zrlock)
+#define	DB_DNODE_ENTER(_db)	(zrl_add(&DB_DNODE_LOCK(_db)))
+#define	DB_DNODE_EXIT(_db)	(zrl_remove(&DB_DNODE_LOCK(_db)))
+#define	DB_DNODE_HELD(_db)	(!zrl_is_zero(&DB_DNODE_LOCK(_db)))
+#define	DB_GET_SPA(_spa_p, _db) {		\
+	dnode_t *__dn;				\
+	DB_DNODE_ENTER(_db);			\
+	__dn = DB_DNODE(_db);			\
+	*(_spa_p) = __dn->dn_objset->os_spa;	\
+	DB_DNODE_EXIT(_db);			\
+}
+#define	DB_GET_OBJSET(_os_p, _db) {		\
+	dnode_t *__dn;				\
+	DB_DNODE_ENTER(_db);			\
+	__dn = DB_DNODE(_db);			\
+	*(_os_p) = __dn->dn_objset;		\
+	DB_DNODE_EXIT(_db);			\
+}
+
+void dbuf_init(void);
+void dbuf_fini(void);
+
+boolean_t dbuf_is_metadata(dmu_buf_impl_t *db);
+
+#define	DBUF_IS_METADATA(_db)	\
+	(dbuf_is_metadata(_db))
+
+#define	DBUF_GET_BUFC_TYPE(_db)	\
+	(DBUF_IS_METADATA(_db) ? ARC_BUFC_METADATA : ARC_BUFC_DATA)
+
+#define	DBUF_IS_CACHEABLE(_db)						\
+	((_db)->db_objset->os_primary_cache == ZFS_CACHE_ALL ||		\
+	(DBUF_IS_METADATA(_db) &&					\
+	((_db)->db_objset->os_primary_cache == ZFS_CACHE_METADATA)))
+
+#define	DBUF_IS_L2CACHEABLE(_db)					\
+	((_db)->db_objset->os_secondary_cache == ZFS_CACHE_ALL ||	\
+	(DBUF_IS_METADATA(_db) &&					\
+	((_db)->db_objset->os_secondary_cache == ZFS_CACHE_METADATA)))
+
+#ifdef ZFS_DEBUG
+
+/*
+ * There should be a ## between the string literal and fmt, to make it
+ * clear that we're joining two strings together, but gcc does not
+ * support that preprocessor token.
+ */
+#define	dprintf_dbuf(dbuf, fmt, ...) do { \
+	if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
+	char __db_buf[32]; \
+	uint64_t __db_obj = (dbuf)->db.db_object; \
+	if (__db_obj == DMU_META_DNODE_OBJECT) \
+		(void) strcpy(__db_buf, "mdn"); \
+	else \
+		(void) snprintf(__db_buf, sizeof (__db_buf), "%lld", \
+		    (u_longlong_t)__db_obj); \
+	dprintf_ds((dbuf)->db_objset->os_dsl_dataset, \
+	    "obj=%s lvl=%u blkid=%lld " fmt, \
+	    __db_buf, (dbuf)->db_level, \
+	    (u_longlong_t)(dbuf)->db_blkid, __VA_ARGS__); \
+	} \
+_NOTE(CONSTCOND) } while (0)
+
+#define	dprintf_dbuf_bp(db, bp, fmt, ...) do {			\
+	if (zfs_flags & ZFS_DEBUG_DPRINTF) {			\
+	char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP);	\
+	sprintf_blkptr(__blkbuf, bp);				\
+	dprintf_dbuf(db, fmt " %s\n", __VA_ARGS__, __blkbuf);	\
+	kmem_free(__blkbuf, BP_SPRINTF_LEN);			\
+	}							\
+_NOTE(CONSTCOND) } while (0)
+
+#define	DBUF_VERIFY(db)	dbuf_verify(db)
+
+#else
+
+#define	dprintf_dbuf(db, fmt, ...)
+#define	dprintf_dbuf_bp(db, bp, fmt, ...)
+#define	DBUF_VERIFY(db)
+
+#endif
+
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_DBUF_H */
diff --git a/uts/common/fs/zfs/sys/ddt.h b/uts/common/fs/zfs/sys/ddt.h
new file mode 100644
index 000000000000..9724d6ecebb0
--- /dev/null
+++ b/uts/common/fs/zfs/sys/ddt.h
@@ -0,0 +1,246 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_DDT_H
+#define	_SYS_DDT_H
+
+#include <sys/sysmacros.h>
+#include <sys/types.h>
+#include <sys/fs/zfs.h>
+#include <sys/zio.h>
+#include <sys/dmu.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * On-disk DDT formats, in the desired search order (newest version first).
+ */
+enum ddt_type {
+	DDT_TYPE_ZAP = 0,
+	DDT_TYPES
+};
+
+/*
+ * DDT classes, in the desired search order (highest replication level first).
+ */
+enum ddt_class {
+	DDT_CLASS_DITTO = 0,
+	DDT_CLASS_DUPLICATE,
+	DDT_CLASS_UNIQUE,
+	DDT_CLASSES
+};
+
+#define	DDT_TYPE_CURRENT		0
+
+#define	DDT_COMPRESS_BYTEORDER_MASK	0x80
+#define	DDT_COMPRESS_FUNCTION_MASK	0x7f
+
+/*
+ * On-disk ddt entry:  key (name) and physical storage (value).
+ */
+typedef struct ddt_key {
+	zio_cksum_t	ddk_cksum;	/* 256-bit block checksum */
+	uint64_t	ddk_prop;	/* LSIZE, PSIZE, compression */
+} ddt_key_t;
+
+/*
+ * ddk_prop layout:
+ *
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ *	|   0	|   0	|   0	| comp	|     PSIZE	|     LSIZE	|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ */
+#define	DDK_GET_LSIZE(ddk)	\
+	BF64_GET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
+#define	DDK_SET_LSIZE(ddk, x)	\
+	BF64_SET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
+
+#define	DDK_GET_PSIZE(ddk)	\
+	BF64_GET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
+#define	DDK_SET_PSIZE(ddk, x)	\
+	BF64_SET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
+
+#define	DDK_GET_COMPRESS(ddk)		BF64_GET((ddk)->ddk_prop, 32, 8)
+#define	DDK_SET_COMPRESS(ddk, x)	BF64_SET((ddk)->ddk_prop, 32, 8, x)
+
+#define	DDT_KEY_WORDS	(sizeof (ddt_key_t) / sizeof (uint64_t))
+
+typedef struct ddt_phys {
+	dva_t		ddp_dva[SPA_DVAS_PER_BP];
+	uint64_t	ddp_refcnt;
+	uint64_t	ddp_phys_birth;
+} ddt_phys_t;
+
+enum ddt_phys_type {
+	DDT_PHYS_DITTO = 0,
+	DDT_PHYS_SINGLE = 1,
+	DDT_PHYS_DOUBLE = 2,
+	DDT_PHYS_TRIPLE = 3,
+	DDT_PHYS_TYPES
+};
+
+/*
+ * In-core ddt entry
+ */
+struct ddt_entry {
+	ddt_key_t	dde_key;
+	ddt_phys_t	dde_phys[DDT_PHYS_TYPES];
+	zio_t		*dde_lead_zio[DDT_PHYS_TYPES];
+	void		*dde_repair_data;
+	enum ddt_type	dde_type;
+	enum ddt_class	dde_class;
+	uint8_t		dde_loading;
+	uint8_t		dde_loaded;
+	kcondvar_t	dde_cv;
+	avl_node_t	dde_node;
+};
+
+/*
+ * In-core ddt
+ */
+struct ddt {
+	kmutex_t	ddt_lock;
+	avl_tree_t	ddt_tree;
+	avl_tree_t	ddt_repair_tree;
+	enum zio_checksum ddt_checksum;
+	spa_t		*ddt_spa;
+	objset_t	*ddt_os;
+	uint64_t	ddt_stat_object;
+	uint64_t	ddt_object[DDT_TYPES][DDT_CLASSES];
+	ddt_histogram_t	ddt_histogram[DDT_TYPES][DDT_CLASSES];
+	ddt_histogram_t	ddt_histogram_cache[DDT_TYPES][DDT_CLASSES];
+	ddt_object_t	ddt_object_stats[DDT_TYPES][DDT_CLASSES];
+	avl_node_t	ddt_node;
+};
+
+/*
+ * In-core and on-disk bookmark for DDT walks
+ */
+typedef struct ddt_bookmark {
+	uint64_t	ddb_class;
+	uint64_t	ddb_type;
+	uint64_t	ddb_checksum;
+	uint64_t	ddb_cursor;
+} ddt_bookmark_t;
+
+/*
+ * Ops vector to access a specific DDT object type.
+ */
+typedef struct ddt_ops {
+	char ddt_op_name[32];
+	int (*ddt_op_create)(objset_t *os, uint64_t *object, dmu_tx_t *tx,
+	    boolean_t prehash);
+	int (*ddt_op_destroy)(objset_t *os, uint64_t object, dmu_tx_t *tx);
+	int (*ddt_op_lookup)(objset_t *os, uint64_t object, ddt_entry_t *dde);
+	void (*ddt_op_prefetch)(objset_t *os, uint64_t object,
+	    ddt_entry_t *dde);
+	int (*ddt_op_update)(objset_t *os, uint64_t object, ddt_entry_t *dde,
+	    dmu_tx_t *tx);
+	int (*ddt_op_remove)(objset_t *os, uint64_t object, ddt_entry_t *dde,
+	    dmu_tx_t *tx);
+	int (*ddt_op_walk)(objset_t *os, uint64_t object, ddt_entry_t *dde,
+	    uint64_t *walk);
+	uint64_t (*ddt_op_count)(objset_t *os, uint64_t object);
+} ddt_ops_t;
+
+#define	DDT_NAMELEN	80
+
+extern void ddt_object_name(ddt_t *ddt, enum ddt_type type,
+    enum ddt_class class, char *name);
+extern int ddt_object_walk(ddt_t *ddt, enum ddt_type type,
+    enum ddt_class class, uint64_t *walk, ddt_entry_t *dde);
+extern uint64_t ddt_object_count(ddt_t *ddt, enum ddt_type type,
+    enum ddt_class class);
+extern int ddt_object_info(ddt_t *ddt, enum ddt_type type,
+    enum ddt_class class, dmu_object_info_t *);
+extern boolean_t ddt_object_exists(ddt_t *ddt, enum ddt_type type,
+    enum ddt_class class);
+
+extern void ddt_bp_fill(const ddt_phys_t *ddp, blkptr_t *bp,
+    uint64_t txg);
+extern void ddt_bp_create(enum zio_checksum checksum, const ddt_key_t *ddk,
+    const ddt_phys_t *ddp, blkptr_t *bp);
+
+extern void ddt_key_fill(ddt_key_t *ddk, const blkptr_t *bp);
+
+extern void ddt_phys_fill(ddt_phys_t *ddp, const blkptr_t *bp);
+extern void ddt_phys_clear(ddt_phys_t *ddp);
+extern void ddt_phys_addref(ddt_phys_t *ddp);
+extern void ddt_phys_decref(ddt_phys_t *ddp);
+extern void ddt_phys_free(ddt_t *ddt, ddt_key_t *ddk, ddt_phys_t *ddp,
+    uint64_t txg);
+extern ddt_phys_t *ddt_phys_select(const ddt_entry_t *dde, const blkptr_t *bp);
+extern uint64_t ddt_phys_total_refcnt(const ddt_entry_t *dde);
+
+extern void ddt_stat_add(ddt_stat_t *dst, const ddt_stat_t *src, uint64_t neg);
+
+extern void ddt_histogram_add(ddt_histogram_t *dst, const ddt_histogram_t *src);
+extern void ddt_histogram_stat(ddt_stat_t *dds, const ddt_histogram_t *ddh);
+extern boolean_t ddt_histogram_empty(const ddt_histogram_t *ddh);
+extern void ddt_get_dedup_object_stats(spa_t *spa, ddt_object_t *ddo);
+extern void ddt_get_dedup_histogram(spa_t *spa, ddt_histogram_t *ddh);
+extern void ddt_get_dedup_stats(spa_t *spa, ddt_stat_t *dds_total);
+
+extern uint64_t ddt_get_dedup_dspace(spa_t *spa);
+extern uint64_t ddt_get_pool_dedup_ratio(spa_t *spa);
+
+extern int ddt_ditto_copies_needed(ddt_t *ddt, ddt_entry_t *dde,
+    ddt_phys_t *ddp_willref);
+extern int ddt_ditto_copies_present(ddt_entry_t *dde);
+
+extern size_t ddt_compress(void *src, uchar_t *dst, size_t s_len, size_t d_len);
+extern void ddt_decompress(uchar_t *src, void *dst, size_t s_len, size_t d_len);
+
+extern ddt_t *ddt_select(spa_t *spa, const blkptr_t *bp);
+extern void ddt_enter(ddt_t *ddt);
+extern void ddt_exit(ddt_t *ddt);
+extern ddt_entry_t *ddt_lookup(ddt_t *ddt, const blkptr_t *bp, boolean_t add);
+extern void ddt_prefetch(spa_t *spa, const blkptr_t *bp);
+extern void ddt_remove(ddt_t *ddt, ddt_entry_t *dde);
+
+extern boolean_t ddt_class_contains(spa_t *spa, enum ddt_class max_class,
+    const blkptr_t *bp);
+
+extern ddt_entry_t *ddt_repair_start(ddt_t *ddt, const blkptr_t *bp);
+extern void ddt_repair_done(ddt_t *ddt, ddt_entry_t *dde);
+
+extern int ddt_entry_compare(const void *x1, const void *x2);
+
+extern void ddt_create(spa_t *spa);
+extern int ddt_load(spa_t *spa);
+extern void ddt_unload(spa_t *spa);
+extern void ddt_sync(spa_t *spa, uint64_t txg);
+extern int ddt_walk(spa_t *spa, ddt_bookmark_t *ddb, ddt_entry_t *dde);
+extern int ddt_object_update(ddt_t *ddt, enum ddt_type type,
+    enum ddt_class class, ddt_entry_t *dde, dmu_tx_t *tx);
+
+extern const ddt_ops_t ddt_zap_ops;
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_DDT_H */
diff --git a/uts/common/fs/zfs/sys/dmu.h b/uts/common/fs/zfs/sys/dmu.h
new file mode 100644
index 000000000000..07f5949ebfea
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dmu.h
@@ -0,0 +1,740 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2010 Robert Milkowski */
+
+#ifndef	_SYS_DMU_H
+#define	_SYS_DMU_H
+
+/*
+ * This file describes the interface that the DMU provides for its
+ * consumers.
+ *
+ * The DMU also interacts with the SPA.  That interface is described in
+ * dmu_spa.h.
+ */
+
+#include <sys/inttypes.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/cred.h>
+#include <sys/time.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct uio;
+struct xuio;
+struct page;
+struct vnode;
+struct spa;
+struct zilog;
+struct zio;
+struct blkptr;
+struct zap_cursor;
+struct dsl_dataset;
+struct dsl_pool;
+struct dnode;
+struct drr_begin;
+struct drr_end;
+struct zbookmark;
+struct spa;
+struct nvlist;
+struct arc_buf;
+struct zio_prop;
+struct sa_handle;
+
+typedef struct objset objset_t;
+typedef struct dmu_tx dmu_tx_t;
+typedef struct dsl_dir dsl_dir_t;
+
+typedef enum dmu_object_type {
+	DMU_OT_NONE,
+	/* general: */
+	DMU_OT_OBJECT_DIRECTORY,	/* ZAP */
+	DMU_OT_OBJECT_ARRAY,		/* UINT64 */
+	DMU_OT_PACKED_NVLIST,		/* UINT8 (XDR by nvlist_pack/unpack) */
+	DMU_OT_PACKED_NVLIST_SIZE,	/* UINT64 */
+	DMU_OT_BPOBJ,			/* UINT64 */
+	DMU_OT_BPOBJ_HDR,		/* UINT64 */
+	/* spa: */
+	DMU_OT_SPACE_MAP_HEADER,	/* UINT64 */
+	DMU_OT_SPACE_MAP,		/* UINT64 */
+	/* zil: */
+	DMU_OT_INTENT_LOG,		/* UINT64 */
+	/* dmu: */
+	DMU_OT_DNODE,			/* DNODE */
+	DMU_OT_OBJSET,			/* OBJSET */
+	/* dsl: */
+	DMU_OT_DSL_DIR,			/* UINT64 */
+	DMU_OT_DSL_DIR_CHILD_MAP,	/* ZAP */
+	DMU_OT_DSL_DS_SNAP_MAP,		/* ZAP */
+	DMU_OT_DSL_PROPS,		/* ZAP */
+	DMU_OT_DSL_DATASET,		/* UINT64 */
+	/* zpl: */
+	DMU_OT_ZNODE,			/* ZNODE */
+	DMU_OT_OLDACL,			/* Old ACL */
+	DMU_OT_PLAIN_FILE_CONTENTS,	/* UINT8 */
+	DMU_OT_DIRECTORY_CONTENTS,	/* ZAP */
+	DMU_OT_MASTER_NODE,		/* ZAP */
+	DMU_OT_UNLINKED_SET,		/* ZAP */
+	/* zvol: */
+	DMU_OT_ZVOL,			/* UINT8 */
+	DMU_OT_ZVOL_PROP,		/* ZAP */
+	/* other; for testing only! */
+	DMU_OT_PLAIN_OTHER,		/* UINT8 */
+	DMU_OT_UINT64_OTHER,		/* UINT64 */
+	DMU_OT_ZAP_OTHER,		/* ZAP */
+	/* new object types: */
+	DMU_OT_ERROR_LOG,		/* ZAP */
+	DMU_OT_SPA_HISTORY,		/* UINT8 */
+	DMU_OT_SPA_HISTORY_OFFSETS,	/* spa_his_phys_t */
+	DMU_OT_POOL_PROPS,		/* ZAP */
+	DMU_OT_DSL_PERMS,		/* ZAP */
+	DMU_OT_ACL,			/* ACL */
+	DMU_OT_SYSACL,			/* SYSACL */
+	DMU_OT_FUID,			/* FUID table (Packed NVLIST UINT8) */
+	DMU_OT_FUID_SIZE,		/* FUID table size UINT64 */
+	DMU_OT_NEXT_CLONES,		/* ZAP */
+	DMU_OT_SCAN_QUEUE,		/* ZAP */
+	DMU_OT_USERGROUP_USED,		/* ZAP */
+	DMU_OT_USERGROUP_QUOTA,		/* ZAP */
+	DMU_OT_USERREFS,		/* ZAP */
+	DMU_OT_DDT_ZAP,			/* ZAP */
+	DMU_OT_DDT_STATS,		/* ZAP */
+	DMU_OT_SA,			/* System attr */
+	DMU_OT_SA_MASTER_NODE,		/* ZAP */
+	DMU_OT_SA_ATTR_REGISTRATION,	/* ZAP */
+	DMU_OT_SA_ATTR_LAYOUTS,		/* ZAP */
+	DMU_OT_SCAN_XLATE,		/* ZAP */
+	DMU_OT_DEDUP,			/* fake dedup BP from ddt_bp_create() */
+	DMU_OT_DEADLIST,		/* ZAP */
+	DMU_OT_DEADLIST_HDR,		/* UINT64 */
+	DMU_OT_DSL_CLONES,		/* ZAP */
+	DMU_OT_BPOBJ_SUBOBJ,		/* UINT64 */
+	DMU_OT_NUMTYPES
+} dmu_object_type_t;
+
+typedef enum dmu_objset_type {
+	DMU_OST_NONE,
+	DMU_OST_META,
+	DMU_OST_ZFS,
+	DMU_OST_ZVOL,
+	DMU_OST_OTHER,			/* For testing only! */
+	DMU_OST_ANY,			/* Be careful! */
+	DMU_OST_NUMTYPES
+} dmu_objset_type_t;
+
+void byteswap_uint64_array(void *buf, size_t size);
+void byteswap_uint32_array(void *buf, size_t size);
+void byteswap_uint16_array(void *buf, size_t size);
+void byteswap_uint8_array(void *buf, size_t size);
+void zap_byteswap(void *buf, size_t size);
+void zfs_oldacl_byteswap(void *buf, size_t size);
+void zfs_acl_byteswap(void *buf, size_t size);
+void zfs_znode_byteswap(void *buf, size_t size);
+
+#define	DS_FIND_SNAPSHOTS	(1<<0)
+#define	DS_FIND_CHILDREN	(1<<1)
+
+/*
+ * The maximum number of bytes that can be accessed as part of one
+ * operation, including metadata.
+ */
+#define	DMU_MAX_ACCESS (10<<20) /* 10MB */
+#define	DMU_MAX_DELETEBLKCNT (20480) /* ~5MB of indirect blocks */
+
+#define	DMU_USERUSED_OBJECT	(-1ULL)
+#define	DMU_GROUPUSED_OBJECT	(-2ULL)
+#define	DMU_DEADLIST_OBJECT	(-3ULL)
+
+/*
+ * artificial blkids for bonus buffer and spill blocks
+ */
+#define	DMU_BONUS_BLKID		(-1ULL)
+#define	DMU_SPILL_BLKID		(-2ULL)
+/*
+ * Public routines to create, destroy, open, and close objsets.
+ */
+int dmu_objset_hold(const char *name, void *tag, objset_t **osp);
+int dmu_objset_own(const char *name, dmu_objset_type_t type,
+    boolean_t readonly, void *tag, objset_t **osp);
+void dmu_objset_rele(objset_t *os, void *tag);
+void dmu_objset_disown(objset_t *os, void *tag);
+int dmu_objset_open_ds(struct dsl_dataset *ds, objset_t **osp);
+
+int dmu_objset_evict_dbufs(objset_t *os);
+int dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
+    void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg);
+int dmu_objset_clone(const char *name, struct dsl_dataset *clone_origin,
+    uint64_t flags);
+int dmu_objset_destroy(const char *name, boolean_t defer);
+int dmu_snapshots_destroy(char *fsname, char *snapname, boolean_t defer);
+int dmu_objset_snapshot(char *fsname, char *snapname, char *tag,
+    struct nvlist *props, boolean_t recursive, boolean_t temporary, int fd);
+int dmu_objset_rename(const char *name, const char *newname,
+    boolean_t recursive);
+int dmu_objset_find(char *name, int func(const char *, void *), void *arg,
+    int flags);
+void dmu_objset_byteswap(void *buf, size_t size);
+
+typedef struct dmu_buf {
+	uint64_t db_object;		/* object that this buffer is part of */
+	uint64_t db_offset;		/* byte offset in this object */
+	uint64_t db_size;		/* size of buffer in bytes */
+	void *db_data;			/* data in buffer */
+} dmu_buf_t;
+
+typedef void dmu_buf_evict_func_t(struct dmu_buf *db, void *user_ptr);
+
+/*
+ * The names of zap entries in the DIRECTORY_OBJECT of the MOS.
+ */
+#define	DMU_POOL_DIRECTORY_OBJECT	1
+#define	DMU_POOL_CONFIG			"config"
+#define	DMU_POOL_ROOT_DATASET		"root_dataset"
+#define	DMU_POOL_SYNC_BPOBJ		"sync_bplist"
+#define	DMU_POOL_ERRLOG_SCRUB		"errlog_scrub"
+#define	DMU_POOL_ERRLOG_LAST		"errlog_last"
+#define	DMU_POOL_SPARES			"spares"
+#define	DMU_POOL_DEFLATE		"deflate"
+#define	DMU_POOL_HISTORY		"history"
+#define	DMU_POOL_PROPS			"pool_props"
+#define	DMU_POOL_L2CACHE		"l2cache"
+#define	DMU_POOL_TMP_USERREFS		"tmp_userrefs"
+#define	DMU_POOL_DDT			"DDT-%s-%s-%s"
+#define	DMU_POOL_DDT_STATS		"DDT-statistics"
+#define	DMU_POOL_CREATION_VERSION	"creation_version"
+#define	DMU_POOL_SCAN			"scan"
+#define	DMU_POOL_FREE_BPOBJ		"free_bpobj"
+
+/*
+ * Allocate an object from this objset.  The range of object numbers
+ * available is (0, DN_MAX_OBJECT).  Object 0 is the meta-dnode.
+ *
+ * The transaction must be assigned to a txg.  The newly allocated
+ * object will be "held" in the transaction (ie. you can modify the
+ * newly allocated object in this transaction).
+ *
+ * dmu_object_alloc() chooses an object and returns it in *objectp.
+ *
+ * dmu_object_claim() allocates a specific object number.  If that
+ * number is already allocated, it fails and returns EEXIST.
+ *
+ * Return 0 on success, or ENOSPC or EEXIST as specified above.
+ */
+uint64_t dmu_object_alloc(objset_t *os, dmu_object_type_t ot,
+    int blocksize, dmu_object_type_t bonus_type, int bonus_len, dmu_tx_t *tx);
+int dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot,
+    int blocksize, dmu_object_type_t bonus_type, int bonus_len, dmu_tx_t *tx);
+int dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot,
+    int blocksize, dmu_object_type_t bonustype, int bonuslen);
+
+/*
+ * Free an object from this objset.
+ *
+ * The object's data will be freed as well (ie. you don't need to call
+ * dmu_free(object, 0, -1, tx)).
+ *
+ * The object need not be held in the transaction.
+ *
+ * If there are any holds on this object's buffers (via dmu_buf_hold()),
+ * or tx holds on the object (via dmu_tx_hold_object()), you can not
+ * free it; it fails and returns EBUSY.
+ *
+ * If the object is not allocated, it fails and returns ENOENT.
+ *
+ * Return 0 on success, or EBUSY or ENOENT as specified above.
+ */
+int dmu_object_free(objset_t *os, uint64_t object, dmu_tx_t *tx);
+
+/*
+ * Find the next allocated or free object.
+ *
+ * The objectp parameter is in-out.  It will be updated to be the next
+ * object which is allocated.  Ignore objects which have not been
+ * modified since txg.
+ *
+ * XXX Can only be called on a objset with no dirty data.
+ *
+ * Returns 0 on success, or ENOENT if there are no more objects.
+ */
+int dmu_object_next(objset_t *os, uint64_t *objectp,
+    boolean_t hole, uint64_t txg);
+
+/*
+ * Set the data blocksize for an object.
+ *
+ * The object cannot have any blocks allcated beyond the first.  If
+ * the first block is allocated already, the new size must be greater
+ * than the current block size.  If these conditions are not met,
+ * ENOTSUP will be returned.
+ *
+ * Returns 0 on success, or EBUSY if there are any holds on the object
+ * contents, or ENOTSUP as described above.
+ */
+int dmu_object_set_blocksize(objset_t *os, uint64_t object, uint64_t size,
+    int ibs, dmu_tx_t *tx);
+
+/*
+ * Set the checksum property on a dnode.  The new checksum algorithm will
+ * apply to all newly written blocks; existing blocks will not be affected.
+ */
+void dmu_object_set_checksum(objset_t *os, uint64_t object, uint8_t checksum,
+    dmu_tx_t *tx);
+
+/*
+ * Set the compress property on a dnode.  The new compression algorithm will
+ * apply to all newly written blocks; existing blocks will not be affected.
+ */
+void dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress,
+    dmu_tx_t *tx);
+
+/*
+ * Decide how to write a block: checksum, compression, number of copies, etc.
+ */
+#define	WP_NOFILL	0x1
+#define	WP_DMU_SYNC	0x2
+#define	WP_SPILL	0x4
+
+void dmu_write_policy(objset_t *os, struct dnode *dn, int level, int wp,
+    struct zio_prop *zp);
+/*
+ * The bonus data is accessed more or less like a regular buffer.
+ * You must dmu_bonus_hold() to get the buffer, which will give you a
+ * dmu_buf_t with db_offset==-1ULL, and db_size = the size of the bonus
+ * data.  As with any normal buffer, you must call dmu_buf_read() to
+ * read db_data, dmu_buf_will_dirty() before modifying it, and the
+ * object must be held in an assigned transaction before calling
+ * dmu_buf_will_dirty.  You may use dmu_buf_set_user() on the bonus
+ * buffer as well.  You must release your hold with dmu_buf_rele().
+ */
+int dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **);
+int dmu_bonus_max(void);
+int dmu_set_bonus(dmu_buf_t *, int, dmu_tx_t *);
+int dmu_set_bonustype(dmu_buf_t *, dmu_object_type_t, dmu_tx_t *);
+dmu_object_type_t dmu_get_bonustype(dmu_buf_t *);
+int dmu_rm_spill(objset_t *, uint64_t, dmu_tx_t *);
+
+/*
+ * Special spill buffer support used by "SA" framework
+ */
+
+int dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp);
+int dmu_spill_hold_by_dnode(struct dnode *dn, uint32_t flags,
+    void *tag, dmu_buf_t **dbp);
+int dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp);
+
+/*
+ * Obtain the DMU buffer from the specified object which contains the
+ * specified offset.  dmu_buf_hold() puts a "hold" on the buffer, so
+ * that it will remain in memory.  You must release the hold with
+ * dmu_buf_rele().  You musn't access the dmu_buf_t after releasing your
+ * hold.  You must have a hold on any dmu_buf_t* you pass to the DMU.
+ *
+ * You must call dmu_buf_read, dmu_buf_will_dirty, or dmu_buf_will_fill
+ * on the returned buffer before reading or writing the buffer's
+ * db_data.  The comments for those routines describe what particular
+ * operations are valid after calling them.
+ *
+ * The object number must be a valid, allocated object number.
+ */
+int dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset,
+    void *tag, dmu_buf_t **, int flags);
+void dmu_buf_add_ref(dmu_buf_t *db, void* tag);
+void dmu_buf_rele(dmu_buf_t *db, void *tag);
+uint64_t dmu_buf_refcount(dmu_buf_t *db);
+
+/*
+ * dmu_buf_hold_array holds the DMU buffers which contain all bytes in a
+ * range of an object.  A pointer to an array of dmu_buf_t*'s is
+ * returned (in *dbpp).
+ *
+ * dmu_buf_rele_array releases the hold on an array of dmu_buf_t*'s, and
+ * frees the array.  The hold on the array of buffers MUST be released
+ * with dmu_buf_rele_array.  You can NOT release the hold on each buffer
+ * individually with dmu_buf_rele.
+ */
+int dmu_buf_hold_array_by_bonus(dmu_buf_t *db, uint64_t offset,
+    uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp);
+void dmu_buf_rele_array(dmu_buf_t **, int numbufs, void *tag);
+
+/*
+ * Returns NULL on success, or the existing user ptr if it's already
+ * been set.
+ *
+ * user_ptr is for use by the user and can be obtained via dmu_buf_get_user().
+ *
+ * user_data_ptr_ptr should be NULL, or a pointer to a pointer which
+ * will be set to db->db_data when you are allowed to access it.  Note
+ * that db->db_data (the pointer) can change when you do dmu_buf_read(),
+ * dmu_buf_tryupgrade(), dmu_buf_will_dirty(), or dmu_buf_will_fill().
+ * *user_data_ptr_ptr will be set to the new value when it changes.
+ *
+ * If non-NULL, pageout func will be called when this buffer is being
+ * excised from the cache, so that you can clean up the data structure
+ * pointed to by user_ptr.
+ *
+ * dmu_evict_user() will call the pageout func for all buffers in a
+ * objset with a given pageout func.
+ */
+void *dmu_buf_set_user(dmu_buf_t *db, void *user_ptr, void *user_data_ptr_ptr,
+    dmu_buf_evict_func_t *pageout_func);
+/*
+ * set_user_ie is the same as set_user, but request immediate eviction
+ * when hold count goes to zero.
+ */
+void *dmu_buf_set_user_ie(dmu_buf_t *db, void *user_ptr,
+    void *user_data_ptr_ptr, dmu_buf_evict_func_t *pageout_func);
+void *dmu_buf_update_user(dmu_buf_t *db_fake, void *old_user_ptr,
+    void *user_ptr, void *user_data_ptr_ptr,
+    dmu_buf_evict_func_t *pageout_func);
+void dmu_evict_user(objset_t *os, dmu_buf_evict_func_t *func);
+
+/*
+ * Returns the user_ptr set with dmu_buf_set_user(), or NULL if not set.
+ */
+void *dmu_buf_get_user(dmu_buf_t *db);
+
+/*
+ * Indicate that you are going to modify the buffer's data (db_data).
+ *
+ * The transaction (tx) must be assigned to a txg (ie. you've called
+ * dmu_tx_assign()).  The buffer's object must be held in the tx
+ * (ie. you've called dmu_tx_hold_object(tx, db->db_object)).
+ */
+void dmu_buf_will_dirty(dmu_buf_t *db, dmu_tx_t *tx);
+
+/*
+ * Tells if the given dbuf is freeable.
+ */
+boolean_t dmu_buf_freeable(dmu_buf_t *);
+
+/*
+ * You must create a transaction, then hold the objects which you will
+ * (or might) modify as part of this transaction.  Then you must assign
+ * the transaction to a transaction group.  Once the transaction has
+ * been assigned, you can modify buffers which belong to held objects as
+ * part of this transaction.  You can't modify buffers before the
+ * transaction has been assigned; you can't modify buffers which don't
+ * belong to objects which this transaction holds; you can't hold
+ * objects once the transaction has been assigned.  You may hold an
+ * object which you are going to free (with dmu_object_free()), but you
+ * don't have to.
+ *
+ * You can abort the transaction before it has been assigned.
+ *
+ * Note that you may hold buffers (with dmu_buf_hold) at any time,
+ * regardless of transaction state.
+ */
+
+#define	DMU_NEW_OBJECT	(-1ULL)
+#define	DMU_OBJECT_END	(-1ULL)
+
+dmu_tx_t *dmu_tx_create(objset_t *os);
+void dmu_tx_hold_write(dmu_tx_t *tx, uint64_t object, uint64_t off, int len);
+void dmu_tx_hold_free(dmu_tx_t *tx, uint64_t object, uint64_t off,
+    uint64_t len);
+void dmu_tx_hold_zap(dmu_tx_t *tx, uint64_t object, int add, const char *name);
+void dmu_tx_hold_bonus(dmu_tx_t *tx, uint64_t object);
+void dmu_tx_hold_spill(dmu_tx_t *tx, uint64_t object);
+void dmu_tx_hold_sa(dmu_tx_t *tx, struct sa_handle *hdl, boolean_t may_grow);
+void dmu_tx_hold_sa_create(dmu_tx_t *tx, int total_size);
+void dmu_tx_abort(dmu_tx_t *tx);
+int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how);
+void dmu_tx_wait(dmu_tx_t *tx);
+void dmu_tx_commit(dmu_tx_t *tx);
+
+/*
+ * To register a commit callback, dmu_tx_callback_register() must be called.
+ *
+ * dcb_data is a pointer to caller private data that is passed on as a
+ * callback parameter. The caller is responsible for properly allocating and
+ * freeing it.
+ *
+ * When registering a callback, the transaction must be already created, but
+ * it cannot be committed or aborted. It can be assigned to a txg or not.
+ *
+ * The callback will be called after the transaction has been safely written
+ * to stable storage and will also be called if the dmu_tx is aborted.
+ * If there is any error which prevents the transaction from being committed to
+ * disk, the callback will be called with a value of error != 0.
+ */
+typedef void dmu_tx_callback_func_t(void *dcb_data, int error);
+
+void dmu_tx_callback_register(dmu_tx_t *tx, dmu_tx_callback_func_t *dcb_func,
+    void *dcb_data);
+
+/*
+ * Free up the data blocks for a defined range of a file.  If size is
+ * zero, the range from offset to end-of-file is freed.
+ */
+int dmu_free_range(objset_t *os, uint64_t object, uint64_t offset,
+	uint64_t size, dmu_tx_t *tx);
+int dmu_free_long_range(objset_t *os, uint64_t object, uint64_t offset,
+	uint64_t size);
+int dmu_free_object(objset_t *os, uint64_t object);
+
+/*
+ * Convenience functions.
+ *
+ * Canfail routines will return 0 on success, or an errno if there is a
+ * nonrecoverable I/O error.
+ */
+#define	DMU_READ_PREFETCH	0 /* prefetch */
+#define	DMU_READ_NO_PREFETCH	1 /* don't prefetch */
+int dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
+	void *buf, uint32_t flags);
+void dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
+	const void *buf, dmu_tx_t *tx);
+void dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
+	dmu_tx_t *tx);
+int dmu_read_uio(objset_t *os, uint64_t object, struct uio *uio, uint64_t size);
+int dmu_write_uio(objset_t *os, uint64_t object, struct uio *uio, uint64_t size,
+    dmu_tx_t *tx);
+int dmu_write_uio_dbuf(dmu_buf_t *zdb, struct uio *uio, uint64_t size,
+    dmu_tx_t *tx);
+int dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset,
+    uint64_t size, struct page *pp, dmu_tx_t *tx);
+struct arc_buf *dmu_request_arcbuf(dmu_buf_t *handle, int size);
+void dmu_return_arcbuf(struct arc_buf *buf);
+void dmu_assign_arcbuf(dmu_buf_t *handle, uint64_t offset, struct arc_buf *buf,
+    dmu_tx_t *tx);
+int dmu_xuio_init(struct xuio *uio, int niov);
+void dmu_xuio_fini(struct xuio *uio);
+int dmu_xuio_add(struct xuio *uio, struct arc_buf *abuf, offset_t off,
+    size_t n);
+int dmu_xuio_cnt(struct xuio *uio);
+struct arc_buf *dmu_xuio_arcbuf(struct xuio *uio, int i);
+void dmu_xuio_clear(struct xuio *uio, int i);
+void xuio_stat_wbuf_copied();
+void xuio_stat_wbuf_nocopy();
+
+extern int zfs_prefetch_disable;
+
+/*
+ * Asynchronously try to read in the data.
+ */
+void dmu_prefetch(objset_t *os, uint64_t object, uint64_t offset,
+    uint64_t len);
+
+typedef struct dmu_object_info {
+	/* All sizes are in bytes unless otherwise indicated. */
+	uint32_t doi_data_block_size;
+	uint32_t doi_metadata_block_size;
+	dmu_object_type_t doi_type;
+	dmu_object_type_t doi_bonus_type;
+	uint64_t doi_bonus_size;
+	uint8_t doi_indirection;		/* 2 = dnode->indirect->data */
+	uint8_t doi_checksum;
+	uint8_t doi_compress;
+	uint8_t doi_pad[5];
+	uint64_t doi_physical_blocks_512;	/* data + metadata, 512b blks */
+	uint64_t doi_max_offset;
+	uint64_t doi_fill_count;		/* number of non-empty blocks */
+} dmu_object_info_t;
+
+typedef void arc_byteswap_func_t(void *buf, size_t size);
+
+typedef struct dmu_object_type_info {
+	arc_byteswap_func_t	*ot_byteswap;
+	boolean_t		ot_metadata;
+	char			*ot_name;
+} dmu_object_type_info_t;
+
+extern const dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES];
+
+/*
+ * Get information on a DMU object.
+ *
+ * Return 0 on success or ENOENT if object is not allocated.
+ *
+ * If doi is NULL, just indicates whether the object exists.
+ */
+int dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi);
+void dmu_object_info_from_dnode(struct dnode *dn, dmu_object_info_t *doi);
+void dmu_object_info_from_db(dmu_buf_t *db, dmu_object_info_t *doi);
+void dmu_object_size_from_db(dmu_buf_t *db, uint32_t *blksize,
+    u_longlong_t *nblk512);
+
+typedef struct dmu_objset_stats {
+	uint64_t dds_num_clones; /* number of clones of this */
+	uint64_t dds_creation_txg;
+	uint64_t dds_guid;
+	dmu_objset_type_t dds_type;
+	uint8_t dds_is_snapshot;
+	uint8_t dds_inconsistent;
+	char dds_origin[MAXNAMELEN];
+} dmu_objset_stats_t;
+
+/*
+ * Get stats on a dataset.
+ */
+void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat);
+
+/*
+ * Add entries to the nvlist for all the objset's properties.  See
+ * zfs_prop_table[] and zfs(1m) for details on the properties.
+ */
+void dmu_objset_stats(objset_t *os, struct nvlist *nv);
+
+/*
+ * Get the space usage statistics for statvfs().
+ *
+ * refdbytes is the amount of space "referenced" by this objset.
+ * availbytes is the amount of space available to this objset, taking
+ * into account quotas & reservations, assuming that no other objsets
+ * use the space first.  These values correspond to the 'referenced' and
+ * 'available' properties, described in the zfs(1m) manpage.
+ *
+ * usedobjs and availobjs are the number of objects currently allocated,
+ * and available.
+ */
+void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
+    uint64_t *usedobjsp, uint64_t *availobjsp);
+
+/*
+ * The fsid_guid is a 56-bit ID that can change to avoid collisions.
+ * (Contrast with the ds_guid which is a 64-bit ID that will never
+ * change, so there is a small probability that it will collide.)
+ */
+uint64_t dmu_objset_fsid_guid(objset_t *os);
+
+/*
+ * Get the [cm]time for an objset's snapshot dir
+ */
+timestruc_t dmu_objset_snap_cmtime(objset_t *os);
+
+int dmu_objset_is_snapshot(objset_t *os);
+
+extern struct spa *dmu_objset_spa(objset_t *os);
+extern struct zilog *dmu_objset_zil(objset_t *os);
+extern struct dsl_pool *dmu_objset_pool(objset_t *os);
+extern struct dsl_dataset *dmu_objset_ds(objset_t *os);
+extern void dmu_objset_name(objset_t *os, char *buf);
+extern dmu_objset_type_t dmu_objset_type(objset_t *os);
+extern uint64_t dmu_objset_id(objset_t *os);
+extern uint64_t dmu_objset_syncprop(objset_t *os);
+extern uint64_t dmu_objset_logbias(objset_t *os);
+extern int dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
+    uint64_t *id, uint64_t *offp, boolean_t *case_conflict);
+extern int dmu_snapshot_realname(objset_t *os, char *name, char *real,
+    int maxlen, boolean_t *conflict);
+extern int dmu_dir_list_next(objset_t *os, int namelen, char *name,
+    uint64_t *idp, uint64_t *offp);
+
+typedef int objset_used_cb_t(dmu_object_type_t bonustype,
+    void *bonus, uint64_t *userp, uint64_t *groupp);
+extern void dmu_objset_register_type(dmu_objset_type_t ost,
+    objset_used_cb_t *cb);
+extern void dmu_objset_set_user(objset_t *os, void *user_ptr);
+extern void *dmu_objset_get_user(objset_t *os);
+
+/*
+ * Return the txg number for the given assigned transaction.
+ */
+uint64_t dmu_tx_get_txg(dmu_tx_t *tx);
+
+/*
+ * Synchronous write.
+ * If a parent zio is provided this function initiates a write on the
+ * provided buffer as a child of the parent zio.
+ * In the absence of a parent zio, the write is completed synchronously.
+ * At write completion, blk is filled with the bp of the written block.
+ * Note that while the data covered by this function will be on stable
+ * storage when the write completes this new data does not become a
+ * permanent part of the file until the associated transaction commits.
+ */
+
+/*
+ * {zfs,zvol,ztest}_get_done() args
+ */
+typedef struct zgd {
+	struct zilog	*zgd_zilog;
+	struct blkptr	*zgd_bp;
+	dmu_buf_t	*zgd_db;
+	struct rl	*zgd_rl;
+	void		*zgd_private;
+} zgd_t;
+
+typedef void dmu_sync_cb_t(zgd_t *arg, int error);
+int dmu_sync(struct zio *zio, uint64_t txg, dmu_sync_cb_t *done, zgd_t *zgd);
+
+/*
+ * Find the next hole or data block in file starting at *off
+ * Return found offset in *off. Return ESRCH for end of file.
+ */
+int dmu_offset_next(objset_t *os, uint64_t object, boolean_t hole,
+    uint64_t *off);
+
+/*
+ * Initial setup and final teardown.
+ */
+extern void dmu_init(void);
+extern void dmu_fini(void);
+
+typedef void (*dmu_traverse_cb_t)(objset_t *os, void *arg, struct blkptr *bp,
+    uint64_t object, uint64_t offset, int len);
+void dmu_traverse_objset(objset_t *os, uint64_t txg_start,
+    dmu_traverse_cb_t cb, void *arg);
+
+int dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
+    struct vnode *vp, offset_t *off);
+
+typedef struct dmu_recv_cookie {
+	/*
+	 * This structure is opaque!
+	 *
+	 * If logical and real are different, we are recving the stream
+	 * into the "real" temporary clone, and then switching it with
+	 * the "logical" target.
+	 */
+	struct dsl_dataset *drc_logical_ds;
+	struct dsl_dataset *drc_real_ds;
+	struct drr_begin *drc_drrb;
+	char *drc_tosnap;
+	char *drc_top_ds;
+	boolean_t drc_newfs;
+	boolean_t drc_force;
+} dmu_recv_cookie_t;
+
+int dmu_recv_begin(char *tofs, char *tosnap, char *topds, struct drr_begin *,
+    boolean_t force, objset_t *origin, dmu_recv_cookie_t *);
+int dmu_recv_stream(dmu_recv_cookie_t *drc, struct vnode *vp, offset_t *voffp,
+    int cleanup_fd, uint64_t *action_handlep);
+int dmu_recv_end(dmu_recv_cookie_t *drc);
+
+int dmu_diff(objset_t *tosnap, objset_t *fromsnap, struct vnode *vp,
+    offset_t *off);
+
+/* CRC64 table */
+#define	ZFS_CRC64_POLY	0xC96C5795D7870F42ULL	/* ECMA-182, reflected form */
+extern uint64_t zfs_crc64_table[256];
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_DMU_H */
diff --git a/uts/common/fs/zfs/sys/dmu_impl.h b/uts/common/fs/zfs/sys/dmu_impl.h
new file mode 100644
index 000000000000..22f9f5f8c88c
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dmu_impl.h
@@ -0,0 +1,272 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_DMU_IMPL_H
+#define	_SYS_DMU_IMPL_H
+
+#include <sys/txg_impl.h>
+#include <sys/zio.h>
+#include <sys/dnode.h>
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * This is the locking strategy for the DMU.  Numbers in parenthesis are
+ * cases that use that lock order, referenced below:
+ *
+ * ARC is self-contained
+ * bplist is self-contained
+ * refcount is self-contained
+ * txg is self-contained (hopefully!)
+ * zst_lock
+ * zf_rwlock
+ *
+ * XXX try to improve evicting path?
+ *
+ * dp_config_rwlock > os_obj_lock > dn_struct_rwlock >
+ * 	dn_dbufs_mtx > hash_mutexes > db_mtx > dd_lock > leafs
+ *
+ * dp_config_rwlock
+ *    must be held before: everything
+ *    protects dd namespace changes
+ *    protects property changes globally
+ *    held from:
+ *    	dsl_dir_open/r:
+ *    	dsl_dir_create_sync/w:
+ *    	dsl_dir_sync_destroy/w:
+ *    	dsl_dir_rename_sync/w:
+ *    	dsl_prop_changed_notify/r:
+ *
+ * os_obj_lock
+ *   must be held before:
+ *   	everything except dp_config_rwlock
+ *   protects os_obj_next
+ *   held from:
+ *   	dmu_object_alloc: dn_dbufs_mtx, db_mtx, hash_mutexes, dn_struct_rwlock
+ *
+ * dn_struct_rwlock
+ *   must be held before:
+ *   	everything except dp_config_rwlock and os_obj_lock
+ *   protects structure of dnode (eg. nlevels)
+ *   	db_blkptr can change when syncing out change to nlevels
+ *   	dn_maxblkid
+ *   	dn_nlevels
+ *   	dn_*blksz*
+ *   	phys nlevels, maxblkid, physical blkptr_t's (?)
+ *   held from:
+ *   	callers of dbuf_read_impl, dbuf_hold[_impl], dbuf_prefetch
+ *   	dmu_object_info_from_dnode: dn_dirty_mtx (dn_datablksz)
+ *   	dmu_tx_count_free:
+ *   	dbuf_read_impl: db_mtx, dmu_zfetch()
+ *   	dmu_zfetch: zf_rwlock/r, zst_lock, dbuf_prefetch()
+ *   	dbuf_new_size: db_mtx
+ *   	dbuf_dirty: db_mtx
+ *	dbuf_findbp: (callers, phys? - the real need)
+ *	dbuf_create: dn_dbufs_mtx, hash_mutexes, db_mtx (phys?)
+ *	dbuf_prefetch: dn_dirty_mtx, hash_mutexes, db_mtx, dn_dbufs_mtx
+ *	dbuf_hold_impl: hash_mutexes, db_mtx, dn_dbufs_mtx, dbuf_findbp()
+ *	dnode_sync/w (increase_indirection): db_mtx (phys)
+ *	dnode_set_blksz/w: dn_dbufs_mtx (dn_*blksz*)
+ *	dnode_new_blkid/w: (dn_maxblkid)
+ *	dnode_free_range/w: dn_dirty_mtx (dn_maxblkid)
+ *	dnode_next_offset: (phys)
+ *
+ * dn_dbufs_mtx
+ *    must be held before:
+ *    	db_mtx, hash_mutexes
+ *    protects:
+ *    	dn_dbufs
+ *    	dn_evicted
+ *    held from:
+ *    	dmu_evict_user: db_mtx (dn_dbufs)
+ *    	dbuf_free_range: db_mtx (dn_dbufs)
+ *    	dbuf_remove_ref: db_mtx, callees:
+ *    		dbuf_hash_remove: hash_mutexes, db_mtx
+ *    	dbuf_create: hash_mutexes, db_mtx (dn_dbufs)
+ *    	dnode_set_blksz: (dn_dbufs)
+ *
+ * hash_mutexes (global)
+ *   must be held before:
+ *   	db_mtx
+ *   protects dbuf_hash_table (global) and db_hash_next
+ *   held from:
+ *   	dbuf_find: db_mtx
+ *   	dbuf_hash_insert: db_mtx
+ *   	dbuf_hash_remove: db_mtx
+ *
+ * db_mtx (meta-leaf)
+ *   must be held before:
+ *   	dn_mtx, dn_dirty_mtx, dd_lock (leaf mutexes)
+ *   protects:
+ *   	db_state
+ * 	db_holds
+ * 	db_buf
+ * 	db_changed
+ * 	db_data_pending
+ * 	db_dirtied
+ * 	db_link
+ * 	db_dirty_node (??)
+ * 	db_dirtycnt
+ * 	db_d.*
+ * 	db.*
+ *   held from:
+ * 	dbuf_dirty: dn_mtx, dn_dirty_mtx
+ * 	dbuf_dirty->dsl_dir_willuse_space: dd_lock
+ * 	dbuf_dirty->dbuf_new_block->dsl_dataset_block_freeable: dd_lock
+ * 	dbuf_undirty: dn_dirty_mtx (db_d)
+ * 	dbuf_write_done: dn_dirty_mtx (db_state)
+ * 	dbuf_*
+ * 	dmu_buf_update_user: none (db_d)
+ * 	dmu_evict_user: none (db_d) (maybe can eliminate)
+ *   	dbuf_find: none (db_holds)
+ *   	dbuf_hash_insert: none (db_holds)
+ *   	dmu_buf_read_array_impl: none (db_state, db_changed)
+ *   	dmu_sync: none (db_dirty_node, db_d)
+ *   	dnode_reallocate: none (db)
+ *
+ * dn_mtx (leaf)
+ *   protects:
+ *   	dn_dirty_dbufs
+ *   	dn_ranges
+ *   	phys accounting
+ * 	dn_allocated_txg
+ * 	dn_free_txg
+ * 	dn_assigned_txg
+ * 	dd_assigned_tx
+ * 	dn_notxholds
+ * 	dn_dirtyctx
+ * 	dn_dirtyctx_firstset
+ * 	(dn_phys copy fields?)
+ * 	(dn_phys contents?)
+ *   held from:
+ *   	dnode_*
+ *   	dbuf_dirty: none
+ *   	dbuf_sync: none (phys accounting)
+ *   	dbuf_undirty: none (dn_ranges, dn_dirty_dbufs)
+ *   	dbuf_write_done: none (phys accounting)
+ *   	dmu_object_info_from_dnode: none (accounting)
+ *   	dmu_tx_commit: none
+ *   	dmu_tx_hold_object_impl: none
+ *   	dmu_tx_try_assign: dn_notxholds(cv)
+ *   	dmu_tx_unassign: none
+ *
+ * dd_lock
+ *    must be held before:
+ *      ds_lock
+ *      ancestors' dd_lock
+ *    protects:
+ *    	dd_prop_cbs
+ *    	dd_sync_*
+ *    	dd_used_bytes
+ *    	dd_tempreserved
+ *    	dd_space_towrite
+ *    	dd_myname
+ *    	dd_phys accounting?
+ *    held from:
+ *    	dsl_dir_*
+ *    	dsl_prop_changed_notify: none (dd_prop_cbs)
+ *    	dsl_prop_register: none (dd_prop_cbs)
+ *    	dsl_prop_unregister: none (dd_prop_cbs)
+ *    	dsl_dataset_block_freeable: none (dd_sync_*)
+ *
+ * os_lock (leaf)
+ *   protects:
+ *   	os_dirty_dnodes
+ *   	os_free_dnodes
+ *   	os_dnodes
+ *   	os_downgraded_dbufs
+ *   	dn_dirtyblksz
+ *   	dn_dirty_link
+ *   held from:
+ *   	dnode_create: none (os_dnodes)
+ *   	dnode_destroy: none (os_dnodes)
+ *   	dnode_setdirty: none (dn_dirtyblksz, os_*_dnodes)
+ *   	dnode_free: none (dn_dirtyblksz, os_*_dnodes)
+ *
+ * ds_lock
+ *    protects:
+ *    	ds_objset
+ *    	ds_open_refcount
+ *    	ds_snapname
+ *    	ds_phys accounting
+ *	ds_phys userrefs zapobj
+ *	ds_reserved
+ *    held from:
+ *    	dsl_dataset_*
+ *
+ * dr_mtx (leaf)
+ *    protects:
+ *	dr_children
+ *    held from:
+ *	dbuf_dirty
+ *	dbuf_undirty
+ *	dbuf_sync_indirect
+ *	dnode_new_blkid
+ */
+
+struct objset;
+struct dmu_pool;
+
+typedef struct dmu_xuio {
+	int next;
+	int cnt;
+	struct arc_buf **bufs;
+	iovec_t *iovp;
+} dmu_xuio_t;
+
+typedef struct xuio_stats {
+	/* loaned yet not returned arc_buf */
+	kstat_named_t xuiostat_onloan_rbuf;
+	kstat_named_t xuiostat_onloan_wbuf;
+	/* whether a copy is made when loaning out a read buffer */
+	kstat_named_t xuiostat_rbuf_copied;
+	kstat_named_t xuiostat_rbuf_nocopy;
+	/* whether a copy is made when assigning a write buffer */
+	kstat_named_t xuiostat_wbuf_copied;
+	kstat_named_t xuiostat_wbuf_nocopy;
+} xuio_stats_t;
+
+static xuio_stats_t xuio_stats = {
+	{ "onloan_read_buf",	KSTAT_DATA_UINT64 },
+	{ "onloan_write_buf",	KSTAT_DATA_UINT64 },
+	{ "read_buf_copied",	KSTAT_DATA_UINT64 },
+	{ "read_buf_nocopy",	KSTAT_DATA_UINT64 },
+	{ "write_buf_copied",	KSTAT_DATA_UINT64 },
+	{ "write_buf_nocopy",	KSTAT_DATA_UINT64 }
+};
+
+#define	XUIOSTAT_INCR(stat, val)	\
+	atomic_add_64(&xuio_stats.stat.value.ui64, (val))
+#define	XUIOSTAT_BUMP(stat)	XUIOSTAT_INCR(stat, 1)
+
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_DMU_IMPL_H */
diff --git a/uts/common/fs/zfs/sys/dmu_objset.h b/uts/common/fs/zfs/sys/dmu_objset.h
new file mode 100644
index 000000000000..c6d202e2e81a
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dmu_objset.h
@@ -0,0 +1,183 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2010 Robert Milkowski */
+
+#ifndef	_SYS_DMU_OBJSET_H
+#define	_SYS_DMU_OBJSET_H
+
+#include <sys/spa.h>
+#include <sys/arc.h>
+#include <sys/txg.h>
+#include <sys/zfs_context.h>
+#include <sys/dnode.h>
+#include <sys/zio.h>
+#include <sys/zil.h>
+#include <sys/sa.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+extern krwlock_t os_lock;
+
+struct dsl_dataset;
+struct dmu_tx;
+
+#define	OBJSET_PHYS_SIZE 2048
+#define	OBJSET_OLD_PHYS_SIZE 1024
+
+#define	OBJSET_BUF_HAS_USERUSED(buf) \
+	(arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE)
+
+#define	OBJSET_FLAG_USERACCOUNTING_COMPLETE	(1ULL<<0)
+
+typedef struct objset_phys {
+	dnode_phys_t os_meta_dnode;
+	zil_header_t os_zil_header;
+	uint64_t os_type;
+	uint64_t os_flags;
+	char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 -
+	    sizeof (zil_header_t) - sizeof (uint64_t)*2];
+	dnode_phys_t os_userused_dnode;
+	dnode_phys_t os_groupused_dnode;
+} objset_phys_t;
+
+struct objset {
+	/* Immutable: */
+	struct dsl_dataset *os_dsl_dataset;
+	spa_t *os_spa;
+	arc_buf_t *os_phys_buf;
+	objset_phys_t *os_phys;
+	/*
+	 * The following "special" dnodes have no parent and are exempt from
+	 * dnode_move(), but they root their descendents in this objset using
+	 * handles anyway, so that all access to dnodes from dbufs consistently
+	 * uses handles.
+	 */
+	dnode_handle_t os_meta_dnode;
+	dnode_handle_t os_userused_dnode;
+	dnode_handle_t os_groupused_dnode;
+	zilog_t *os_zil;
+
+	/* can change, under dsl_dir's locks: */
+	uint8_t os_checksum;
+	uint8_t os_compress;
+	uint8_t os_copies;
+	uint8_t os_dedup_checksum;
+	uint8_t os_dedup_verify;
+	uint8_t os_logbias;
+	uint8_t os_primary_cache;
+	uint8_t os_secondary_cache;
+	uint8_t os_sync;
+
+	/* no lock needed: */
+	struct dmu_tx *os_synctx; /* XXX sketchy */
+	blkptr_t *os_rootbp;
+	zil_header_t os_zil_header;
+	list_t os_synced_dnodes;
+	uint64_t os_flags;
+
+	/* Protected by os_obj_lock */
+	kmutex_t os_obj_lock;
+	uint64_t os_obj_next;
+
+	/* Protected by os_lock */
+	kmutex_t os_lock;
+	list_t os_dirty_dnodes[TXG_SIZE];
+	list_t os_free_dnodes[TXG_SIZE];
+	list_t os_dnodes;
+	list_t os_downgraded_dbufs;
+
+	/* stuff we store for the user */
+	kmutex_t os_user_ptr_lock;
+	void *os_user_ptr;
+
+	/* SA layout/attribute registration */
+	sa_os_t *os_sa;
+};
+
+#define	DMU_META_OBJSET		0
+#define	DMU_META_DNODE_OBJECT	0
+#define	DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0)
+#define	DMU_META_DNODE(os)	((os)->os_meta_dnode.dnh_dnode)
+#define	DMU_USERUSED_DNODE(os)	((os)->os_userused_dnode.dnh_dnode)
+#define	DMU_GROUPUSED_DNODE(os)	((os)->os_groupused_dnode.dnh_dnode)
+
+#define	DMU_OS_IS_L2CACHEABLE(os)				\
+	((os)->os_secondary_cache == ZFS_CACHE_ALL ||		\
+	(os)->os_secondary_cache == ZFS_CACHE_METADATA)
+
+/* called from zpl */
+int dmu_objset_hold(const char *name, void *tag, objset_t **osp);
+int dmu_objset_own(const char *name, dmu_objset_type_t type,
+    boolean_t readonly, void *tag, objset_t **osp);
+void dmu_objset_rele(objset_t *os, void *tag);
+void dmu_objset_disown(objset_t *os, void *tag);
+int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp);
+
+int dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
+    void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg);
+int dmu_objset_clone(const char *name, struct dsl_dataset *clone_origin,
+    uint64_t flags);
+int dmu_objset_destroy(const char *name, boolean_t defer);
+int dmu_objset_snapshot(char *fsname, char *snapname, char *tag,
+    struct nvlist *props, boolean_t recursive, boolean_t temporary, int fd);
+void dmu_objset_stats(objset_t *os, nvlist_t *nv);
+void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat);
+void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
+    uint64_t *usedobjsp, uint64_t *availobjsp);
+uint64_t dmu_objset_fsid_guid(objset_t *os);
+int dmu_objset_find(char *name, int func(const char *, void *), void *arg,
+    int flags);
+int dmu_objset_find_spa(spa_t *spa, const char *name,
+    int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags);
+int dmu_objset_prefetch(const char *name, void *arg);
+void dmu_objset_byteswap(void *buf, size_t size);
+int dmu_objset_evict_dbufs(objset_t *os);
+timestruc_t dmu_objset_snap_cmtime(objset_t *os);
+
+/* called from dsl */
+void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx);
+boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg);
+boolean_t dmu_objset_is_dirty_anywhere(objset_t *os);
+objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds,
+    blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx);
+int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp,
+    objset_t **osp);
+void dmu_objset_evict(objset_t *os);
+void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx);
+void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx);
+boolean_t dmu_objset_userused_enabled(objset_t *os);
+int dmu_objset_userspace_upgrade(objset_t *os);
+boolean_t dmu_objset_userspace_present(objset_t *os);
+
+void dmu_objset_init(void);
+void dmu_objset_fini(void);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_DMU_OBJSET_H */
diff --git a/uts/common/fs/zfs/sys/dmu_traverse.h b/uts/common/fs/zfs/sys/dmu_traverse.h
new file mode 100644
index 000000000000..5b326cd99c09
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dmu_traverse.h
@@ -0,0 +1,64 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_DMU_TRAVERSE_H
+#define	_SYS_DMU_TRAVERSE_H
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/zio.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct dnode_phys;
+struct dsl_dataset;
+struct zilog;
+struct arc_buf;
+
+typedef int (blkptr_cb_t)(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
+    struct arc_buf *pbuf, const zbookmark_t *zb, const struct dnode_phys *dnp,
+    void *arg);
+
+#define	TRAVERSE_PRE			(1<<0)
+#define	TRAVERSE_POST			(1<<1)
+#define	TRAVERSE_PREFETCH_METADATA	(1<<2)
+#define	TRAVERSE_PREFETCH_DATA		(1<<3)
+#define	TRAVERSE_PREFETCH (TRAVERSE_PREFETCH_METADATA | TRAVERSE_PREFETCH_DATA)
+#define	TRAVERSE_HARD			(1<<4)
+
+/* Special traverse error return value to indicate skipping of children */
+#define	TRAVERSE_VISIT_NO_CHILDREN	-1
+
+int traverse_dataset(struct dsl_dataset *ds,
+    uint64_t txg_start, int flags, blkptr_cb_t func, void *arg);
+int traverse_pool(spa_t *spa,
+    uint64_t txg_start, int flags, blkptr_cb_t func, void *arg);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_DMU_TRAVERSE_H */
diff --git a/uts/common/fs/zfs/sys/dmu_tx.h b/uts/common/fs/zfs/sys/dmu_tx.h
new file mode 100644
index 000000000000..c5ea50fa8d82
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dmu_tx.h
@@ -0,0 +1,148 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_DMU_TX_H
+#define	_SYS_DMU_TX_H
+
+#include <sys/inttypes.h>
+#include <sys/dmu.h>
+#include <sys/txg.h>
+#include <sys/refcount.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct dmu_buf_impl;
+struct dmu_tx_hold;
+struct dnode_link;
+struct dsl_pool;
+struct dnode;
+struct dsl_dir;
+
+struct dmu_tx {
+	/*
+	 * No synchronization is needed because a tx can only be handled
+	 * by one thread.
+	 */
+	list_t tx_holds; /* list of dmu_tx_hold_t */
+	objset_t *tx_objset;
+	struct dsl_dir *tx_dir;
+	struct dsl_pool *tx_pool;
+	uint64_t tx_txg;
+	uint64_t tx_lastsnap_txg;
+	uint64_t tx_lasttried_txg;
+	txg_handle_t tx_txgh;
+	void *tx_tempreserve_cookie;
+	struct dmu_tx_hold *tx_needassign_txh;
+	list_t tx_callbacks; /* list of dmu_tx_callback_t on this dmu_tx */
+	uint8_t tx_anyobj;
+	int tx_err;
+#ifdef ZFS_DEBUG
+	uint64_t tx_space_towrite;
+	uint64_t tx_space_tofree;
+	uint64_t tx_space_tooverwrite;
+	uint64_t tx_space_tounref;
+	refcount_t tx_space_written;
+	refcount_t tx_space_freed;
+#endif
+};
+
+enum dmu_tx_hold_type {
+	THT_NEWOBJECT,
+	THT_WRITE,
+	THT_BONUS,
+	THT_FREE,
+	THT_ZAP,
+	THT_SPACE,
+	THT_SPILL,
+	THT_NUMTYPES
+};
+
+typedef struct dmu_tx_hold {
+	dmu_tx_t *txh_tx;
+	list_node_t txh_node;
+	struct dnode *txh_dnode;
+	uint64_t txh_space_towrite;
+	uint64_t txh_space_tofree;
+	uint64_t txh_space_tooverwrite;
+	uint64_t txh_space_tounref;
+	uint64_t txh_memory_tohold;
+	uint64_t txh_fudge;
+#ifdef ZFS_DEBUG
+	enum dmu_tx_hold_type txh_type;
+	uint64_t txh_arg1;
+	uint64_t txh_arg2;
+#endif
+} dmu_tx_hold_t;
+
+typedef struct dmu_tx_callback {
+	list_node_t		dcb_node;    /* linked to tx_callbacks list */
+	dmu_tx_callback_func_t	*dcb_func;   /* caller function pointer */
+	void			*dcb_data;   /* caller private data */
+} dmu_tx_callback_t;
+
+/*
+ * These routines are defined in dmu.h, and are called by the user.
+ */
+dmu_tx_t *dmu_tx_create(objset_t *dd);
+int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how);
+void dmu_tx_commit(dmu_tx_t *tx);
+void dmu_tx_abort(dmu_tx_t *tx);
+uint64_t dmu_tx_get_txg(dmu_tx_t *tx);
+void dmu_tx_wait(dmu_tx_t *tx);
+
+void dmu_tx_callback_register(dmu_tx_t *tx, dmu_tx_callback_func_t *dcb_func,
+    void *dcb_data);
+void dmu_tx_do_callbacks(list_t *cb_list, int error);
+
+/*
+ * These routines are defined in dmu_spa.h, and are called by the SPA.
+ */
+extern dmu_tx_t *dmu_tx_create_assigned(struct dsl_pool *dp, uint64_t txg);
+
+/*
+ * These routines are only called by the DMU.
+ */
+dmu_tx_t *dmu_tx_create_dd(dsl_dir_t *dd);
+int dmu_tx_is_syncing(dmu_tx_t *tx);
+int dmu_tx_private_ok(dmu_tx_t *tx);
+void dmu_tx_add_new_object(dmu_tx_t *tx, objset_t *os, uint64_t object);
+void dmu_tx_willuse_space(dmu_tx_t *tx, int64_t delta);
+void dmu_tx_dirty_buf(dmu_tx_t *tx, struct dmu_buf_impl *db);
+int dmu_tx_holds(dmu_tx_t *tx, uint64_t object);
+void dmu_tx_hold_space(dmu_tx_t *tx, uint64_t space);
+
+#ifdef ZFS_DEBUG
+#define	DMU_TX_DIRTY_BUF(tx, db)	dmu_tx_dirty_buf(tx, db)
+#else
+#define	DMU_TX_DIRTY_BUF(tx, db)
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_DMU_TX_H */
diff --git a/uts/common/fs/zfs/sys/dmu_zfetch.h b/uts/common/fs/zfs/sys/dmu_zfetch.h
new file mode 100644
index 000000000000..78cadd2b1ee1
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dmu_zfetch.h
@@ -0,0 +1,76 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_DFETCH_H
+#define	_DFETCH_H
+
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+extern uint64_t	zfetch_array_rd_sz;
+
+struct dnode;				/* so we can reference dnode */
+
+typedef enum zfetch_dirn {
+	ZFETCH_FORWARD = 1,		/* prefetch increasing block numbers */
+	ZFETCH_BACKWARD	= -1		/* prefetch decreasing block numbers */
+} zfetch_dirn_t;
+
+typedef struct zstream {
+	uint64_t	zst_offset;	/* offset of starting block in range */
+	uint64_t	zst_len;	/* length of range, in blocks */
+	zfetch_dirn_t	zst_direction;	/* direction of prefetch */
+	uint64_t	zst_stride;	/* length of stride, in blocks */
+	uint64_t	zst_ph_offset;	/* prefetch offset, in blocks */
+	uint64_t	zst_cap;	/* prefetch limit (cap), in blocks */
+	kmutex_t	zst_lock;	/* protects stream */
+	clock_t		zst_last;	/* lbolt of last prefetch */
+	avl_node_t	zst_node;	/* embed avl node here */
+} zstream_t;
+
+typedef struct zfetch {
+	krwlock_t	zf_rwlock;	/* protects zfetch structure */
+	list_t		zf_stream;	/* AVL tree of zstream_t's */
+	struct dnode	*zf_dnode;	/* dnode that owns this zfetch */
+	uint32_t	zf_stream_cnt;	/* # of active streams */
+	uint64_t	zf_alloc_fail;	/* # of failed attempts to alloc strm */
+} zfetch_t;
+
+void		zfetch_init(void);
+void		zfetch_fini(void);
+
+void		dmu_zfetch_init(zfetch_t *, struct dnode *);
+void		dmu_zfetch_rele(zfetch_t *);
+void		dmu_zfetch(zfetch_t *, uint64_t, uint64_t, int);
+
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _DFETCH_H */
diff --git a/uts/common/fs/zfs/sys/dnode.h b/uts/common/fs/zfs/sys/dnode.h
new file mode 100644
index 000000000000..9ad4be36bf85
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dnode.h
@@ -0,0 +1,329 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_DNODE_H
+#define	_SYS_DNODE_H
+
+#include <sys/zfs_context.h>
+#include <sys/avl.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/zio.h>
+#include <sys/refcount.h>
+#include <sys/dmu_zfetch.h>
+#include <sys/zrlock.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * dnode_hold() flags.
+ */
+#define	DNODE_MUST_BE_ALLOCATED	1
+#define	DNODE_MUST_BE_FREE	2
+
+/*
+ * dnode_next_offset() flags.
+ */
+#define	DNODE_FIND_HOLE		1
+#define	DNODE_FIND_BACKWARDS	2
+#define	DNODE_FIND_HAVELOCK	4
+
+/*
+ * Fixed constants.
+ */
+#define	DNODE_SHIFT		9	/* 512 bytes */
+#define	DN_MIN_INDBLKSHIFT	10	/* 1k */
+#define	DN_MAX_INDBLKSHIFT	14	/* 16k */
+#define	DNODE_BLOCK_SHIFT	14	/* 16k */
+#define	DNODE_CORE_SIZE		64	/* 64 bytes for dnode sans blkptrs */
+#define	DN_MAX_OBJECT_SHIFT	48	/* 256 trillion (zfs_fid_t limit) */
+#define	DN_MAX_OFFSET_SHIFT	64	/* 2^64 bytes in a dnode */
+
+/*
+ * dnode id flags
+ *
+ * Note: a file will never ever have its
+ * ids moved from bonus->spill
+ * and only in a crypto environment would it be on spill
+ */
+#define	DN_ID_CHKED_BONUS	0x1
+#define	DN_ID_CHKED_SPILL	0x2
+#define	DN_ID_OLD_EXIST		0x4
+#define	DN_ID_NEW_EXIST		0x8
+
+/*
+ * Derived constants.
+ */
+#define	DNODE_SIZE	(1 << DNODE_SHIFT)
+#define	DN_MAX_NBLKPTR	((DNODE_SIZE - DNODE_CORE_SIZE) >> SPA_BLKPTRSHIFT)
+#define	DN_MAX_BONUSLEN	(DNODE_SIZE - DNODE_CORE_SIZE - (1 << SPA_BLKPTRSHIFT))
+#define	DN_MAX_OBJECT	(1ULL << DN_MAX_OBJECT_SHIFT)
+#define	DN_ZERO_BONUSLEN	(DN_MAX_BONUSLEN + 1)
+#define	DN_KILL_SPILLBLK (1)
+
+#define	DNODES_PER_BLOCK_SHIFT	(DNODE_BLOCK_SHIFT - DNODE_SHIFT)
+#define	DNODES_PER_BLOCK	(1ULL << DNODES_PER_BLOCK_SHIFT)
+#define	DNODES_PER_LEVEL_SHIFT	(DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT)
+#define	DNODES_PER_LEVEL	(1ULL << DNODES_PER_LEVEL_SHIFT)
+
+/* The +2 here is a cheesy way to round up */
+#define	DN_MAX_LEVELS	(2 + ((DN_MAX_OFFSET_SHIFT - SPA_MINBLOCKSHIFT) / \
+	(DN_MIN_INDBLKSHIFT - SPA_BLKPTRSHIFT)))
+
+#define	DN_BONUS(dnp)	((void*)((dnp)->dn_bonus + \
+	(((dnp)->dn_nblkptr - 1) * sizeof (blkptr_t))))
+
+#define	DN_USED_BYTES(dnp) (((dnp)->dn_flags & DNODE_FLAG_USED_BYTES) ? \
+	(dnp)->dn_used : (dnp)->dn_used << SPA_MINBLOCKSHIFT)
+
+#define	EPB(blkshift, typeshift)	(1 << (blkshift - typeshift))
+
+struct dmu_buf_impl;
+struct objset;
+struct zio;
+
+enum dnode_dirtycontext {
+	DN_UNDIRTIED,
+	DN_DIRTY_OPEN,
+	DN_DIRTY_SYNC
+};
+
+/* Is dn_used in bytes?  if not, it's in multiples of SPA_MINBLOCKSIZE */
+#define	DNODE_FLAG_USED_BYTES		(1<<0)
+#define	DNODE_FLAG_USERUSED_ACCOUNTED	(1<<1)
+
+/* Does dnode have a SA spill blkptr in bonus? */
+#define	DNODE_FLAG_SPILL_BLKPTR	(1<<2)
+
+typedef struct dnode_phys {
+	uint8_t dn_type;		/* dmu_object_type_t */
+	uint8_t dn_indblkshift;		/* ln2(indirect block size) */
+	uint8_t dn_nlevels;		/* 1=dn_blkptr->data blocks */
+	uint8_t dn_nblkptr;		/* length of dn_blkptr */
+	uint8_t dn_bonustype;		/* type of data in bonus buffer */
+	uint8_t	dn_checksum;		/* ZIO_CHECKSUM type */
+	uint8_t	dn_compress;		/* ZIO_COMPRESS type */
+	uint8_t dn_flags;		/* DNODE_FLAG_* */
+	uint16_t dn_datablkszsec;	/* data block size in 512b sectors */
+	uint16_t dn_bonuslen;		/* length of dn_bonus */
+	uint8_t dn_pad2[4];
+
+	/* accounting is protected by dn_dirty_mtx */
+	uint64_t dn_maxblkid;		/* largest allocated block ID */
+	uint64_t dn_used;		/* bytes (or sectors) of disk space */
+
+	uint64_t dn_pad3[4];
+
+	blkptr_t dn_blkptr[1];
+	uint8_t dn_bonus[DN_MAX_BONUSLEN - sizeof (blkptr_t)];
+	blkptr_t dn_spill;
+} dnode_phys_t;
+
+typedef struct dnode {
+	/*
+	 * dn_struct_rwlock protects the structure of the dnode,
+	 * including the number of levels of indirection (dn_nlevels),
+	 * dn_maxblkid, and dn_next_*
+	 */
+	krwlock_t dn_struct_rwlock;
+
+	/* Our link on dn_objset->os_dnodes list; protected by os_lock.  */
+	list_node_t dn_link;
+
+	/* immutable: */
+	struct objset *dn_objset;
+	uint64_t dn_object;
+	struct dmu_buf_impl *dn_dbuf;
+	struct dnode_handle *dn_handle;
+	dnode_phys_t *dn_phys; /* pointer into dn->dn_dbuf->db.db_data */
+
+	/*
+	 * Copies of stuff in dn_phys.  They're valid in the open
+	 * context (eg. even before the dnode is first synced).
+	 * Where necessary, these are protected by dn_struct_rwlock.
+	 */
+	dmu_object_type_t dn_type;	/* object type */
+	uint16_t dn_bonuslen;		/* bonus length */
+	uint8_t dn_bonustype;		/* bonus type */
+	uint8_t dn_nblkptr;		/* number of blkptrs (immutable) */
+	uint8_t dn_checksum;		/* ZIO_CHECKSUM type */
+	uint8_t dn_compress;		/* ZIO_COMPRESS type */
+	uint8_t dn_nlevels;
+	uint8_t dn_indblkshift;
+	uint8_t dn_datablkshift;	/* zero if blksz not power of 2! */
+	uint8_t dn_moved;		/* Has this dnode been moved? */
+	uint16_t dn_datablkszsec;	/* in 512b sectors */
+	uint32_t dn_datablksz;		/* in bytes */
+	uint64_t dn_maxblkid;
+	uint8_t dn_next_nblkptr[TXG_SIZE];
+	uint8_t dn_next_nlevels[TXG_SIZE];
+	uint8_t dn_next_indblkshift[TXG_SIZE];
+	uint8_t dn_next_bonustype[TXG_SIZE];
+	uint8_t dn_rm_spillblk[TXG_SIZE];	/* for removing spill blk */
+	uint16_t dn_next_bonuslen[TXG_SIZE];
+	uint32_t dn_next_blksz[TXG_SIZE];	/* next block size in bytes */
+
+	/* protected by dn_dbufs_mtx; declared here to fill 32-bit hole */
+	uint32_t dn_dbufs_count;	/* count of dn_dbufs */
+
+	/* protected by os_lock: */
+	list_node_t dn_dirty_link[TXG_SIZE];	/* next on dataset's dirty */
+
+	/* protected by dn_mtx: */
+	kmutex_t dn_mtx;
+	list_t dn_dirty_records[TXG_SIZE];
+	avl_tree_t dn_ranges[TXG_SIZE];
+	uint64_t dn_allocated_txg;
+	uint64_t dn_free_txg;
+	uint64_t dn_assigned_txg;
+	kcondvar_t dn_notxholds;
+	enum dnode_dirtycontext dn_dirtyctx;
+	uint8_t *dn_dirtyctx_firstset;		/* dbg: contents meaningless */
+
+	/* protected by own devices */
+	refcount_t dn_tx_holds;
+	refcount_t dn_holds;
+
+	kmutex_t dn_dbufs_mtx;
+	list_t dn_dbufs;		/* descendent dbufs */
+
+	/* protected by dn_struct_rwlock */
+	struct dmu_buf_impl *dn_bonus;	/* bonus buffer dbuf */
+
+	boolean_t dn_have_spill;	/* have spill or are spilling */
+
+	/* parent IO for current sync write */
+	zio_t *dn_zio;
+
+	/* used in syncing context */
+	uint64_t dn_oldused;	/* old phys used bytes */
+	uint64_t dn_oldflags;	/* old phys dn_flags */
+	uint64_t dn_olduid, dn_oldgid;
+	uint64_t dn_newuid, dn_newgid;
+	int dn_id_flags;
+
+	/* holds prefetch structure */
+	struct zfetch	dn_zfetch;
+} dnode_t;
+
+/*
+ * Adds a level of indirection between the dbuf and the dnode to avoid
+ * iterating descendent dbufs in dnode_move(). Handles are not allocated
+ * individually, but as an array of child dnodes in dnode_hold_impl().
+ */
+typedef struct dnode_handle {
+	/* Protects dnh_dnode from modification by dnode_move(). */
+	zrlock_t dnh_zrlock;
+	dnode_t *dnh_dnode;
+} dnode_handle_t;
+
+typedef struct dnode_children {
+	size_t dnc_count;		/* number of children */
+	dnode_handle_t dnc_children[1];	/* sized dynamically */
+} dnode_children_t;
+
+typedef struct free_range {
+	avl_node_t fr_node;
+	uint64_t fr_blkid;
+	uint64_t fr_nblks;
+} free_range_t;
+
+dnode_t *dnode_special_open(struct objset *dd, dnode_phys_t *dnp,
+    uint64_t object, dnode_handle_t *dnh);
+void dnode_special_close(dnode_handle_t *dnh);
+
+void dnode_setbonuslen(dnode_t *dn, int newsize, dmu_tx_t *tx);
+void dnode_setbonus_type(dnode_t *dn, dmu_object_type_t, dmu_tx_t *tx);
+void dnode_rm_spill(dnode_t *dn, dmu_tx_t *tx);
+
+int dnode_hold(struct objset *dd, uint64_t object,
+    void *ref, dnode_t **dnp);
+int dnode_hold_impl(struct objset *dd, uint64_t object, int flag,
+    void *ref, dnode_t **dnp);
+boolean_t dnode_add_ref(dnode_t *dn, void *ref);
+void dnode_rele(dnode_t *dn, void *ref);
+void dnode_setdirty(dnode_t *dn, dmu_tx_t *tx);
+void dnode_sync(dnode_t *dn, dmu_tx_t *tx);
+void dnode_allocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, int ibs,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx);
+void dnode_reallocate(dnode_t *dn, dmu_object_type_t ot, int blocksize,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx);
+void dnode_free(dnode_t *dn, dmu_tx_t *tx);
+void dnode_byteswap(dnode_phys_t *dnp);
+void dnode_buf_byteswap(void *buf, size_t size);
+void dnode_verify(dnode_t *dn);
+int dnode_set_blksz(dnode_t *dn, uint64_t size, int ibs, dmu_tx_t *tx);
+uint64_t dnode_current_max_length(dnode_t *dn);
+void dnode_free_range(dnode_t *dn, uint64_t off, uint64_t len, dmu_tx_t *tx);
+void dnode_clear_range(dnode_t *dn, uint64_t blkid,
+    uint64_t nblks, dmu_tx_t *tx);
+void dnode_diduse_space(dnode_t *dn, int64_t space);
+void dnode_willuse_space(dnode_t *dn, int64_t space, dmu_tx_t *tx);
+void dnode_new_blkid(dnode_t *dn, uint64_t blkid, dmu_tx_t *tx, boolean_t);
+uint64_t dnode_block_freed(dnode_t *dn, uint64_t blkid);
+void dnode_init(void);
+void dnode_fini(void);
+int dnode_next_offset(dnode_t *dn, int flags, uint64_t *off,
+    int minlvl, uint64_t blkfill, uint64_t txg);
+void dnode_evict_dbufs(dnode_t *dn);
+
+#ifdef ZFS_DEBUG
+
+/*
+ * There should be a ## between the string literal and fmt, to make it
+ * clear that we're joining two strings together, but that piece of shit
+ * gcc doesn't support that preprocessor token.
+ */
+#define	dprintf_dnode(dn, fmt, ...) do { \
+	if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
+	char __db_buf[32]; \
+	uint64_t __db_obj = (dn)->dn_object; \
+	if (__db_obj == DMU_META_DNODE_OBJECT) \
+		(void) strcpy(__db_buf, "mdn"); \
+	else \
+		(void) snprintf(__db_buf, sizeof (__db_buf), "%lld", \
+		    (u_longlong_t)__db_obj);\
+	dprintf_ds((dn)->dn_objset->os_dsl_dataset, "obj=%s " fmt, \
+	    __db_buf, __VA_ARGS__); \
+	} \
+_NOTE(CONSTCOND) } while (0)
+
+#define	DNODE_VERIFY(dn)		dnode_verify(dn)
+#define	FREE_VERIFY(db, start, end, tx)	free_verify(db, start, end, tx)
+
+#else
+
+#define	dprintf_dnode(db, fmt, ...)
+#define	DNODE_VERIFY(dn)
+#define	FREE_VERIFY(db, start, end, tx)
+
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_DNODE_H */
diff --git a/uts/common/fs/zfs/sys/dsl_dataset.h b/uts/common/fs/zfs/sys/dsl_dataset.h
new file mode 100644
index 000000000000..22733d070e8b
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dsl_dataset.h
@@ -0,0 +1,283 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_DSL_DATASET_H
+#define	_SYS_DSL_DATASET_H
+
+#include <sys/dmu.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/zio.h>
+#include <sys/bplist.h>
+#include <sys/dsl_synctask.h>
+#include <sys/zfs_context.h>
+#include <sys/dsl_deadlist.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct dsl_dataset;
+struct dsl_dir;
+struct dsl_pool;
+
+#define	DS_FLAG_INCONSISTENT	(1ULL<<0)
+#define	DS_IS_INCONSISTENT(ds)	\
+	((ds)->ds_phys->ds_flags & DS_FLAG_INCONSISTENT)
+/*
+ * NB: nopromote can not yet be set, but we want support for it in this
+ * on-disk version, so that we don't need to upgrade for it later.  It
+ * will be needed when we implement 'zfs split' (where the split off
+ * clone should not be promoted).
+ */
+#define	DS_FLAG_NOPROMOTE	(1ULL<<1)
+
+/*
+ * DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly
+ * calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE,
+ * refquota/refreservations).
+ */
+#define	DS_FLAG_UNIQUE_ACCURATE	(1ULL<<2)
+
+/*
+ * DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called
+ * on a dataset. This allows the dataset to be destroyed using 'zfs release'.
+ */
+#define	DS_FLAG_DEFER_DESTROY	(1ULL<<3)
+#define	DS_IS_DEFER_DESTROY(ds)	\
+	((ds)->ds_phys->ds_flags & DS_FLAG_DEFER_DESTROY)
+
+/*
+ * DS_FLAG_CI_DATASET is set if the dataset contains a file system whose
+ * name lookups should be performed case-insensitively.
+ */
+#define	DS_FLAG_CI_DATASET	(1ULL<<16)
+
+typedef struct dsl_dataset_phys {
+	uint64_t ds_dir_obj;		/* DMU_OT_DSL_DIR */
+	uint64_t ds_prev_snap_obj;	/* DMU_OT_DSL_DATASET */
+	uint64_t ds_prev_snap_txg;
+	uint64_t ds_next_snap_obj;	/* DMU_OT_DSL_DATASET */
+	uint64_t ds_snapnames_zapobj;	/* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */
+	uint64_t ds_num_children;	/* clone/snap children; ==0 for head */
+	uint64_t ds_creation_time;	/* seconds since 1970 */
+	uint64_t ds_creation_txg;
+	uint64_t ds_deadlist_obj;	/* DMU_OT_DEADLIST */
+	uint64_t ds_used_bytes;
+	uint64_t ds_compressed_bytes;
+	uint64_t ds_uncompressed_bytes;
+	uint64_t ds_unique_bytes;	/* only relevant to snapshots */
+	/*
+	 * The ds_fsid_guid is a 56-bit ID that can change to avoid
+	 * collisions.  The ds_guid is a 64-bit ID that will never
+	 * change, so there is a small probability that it will collide.
+	 */
+	uint64_t ds_fsid_guid;
+	uint64_t ds_guid;
+	uint64_t ds_flags;		/* DS_FLAG_* */
+	blkptr_t ds_bp;
+	uint64_t ds_next_clones_obj;	/* DMU_OT_DSL_CLONES */
+	uint64_t ds_props_obj;		/* DMU_OT_DSL_PROPS for snaps */
+	uint64_t ds_userrefs_obj;	/* DMU_OT_USERREFS */
+	uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */
+} dsl_dataset_phys_t;
+
+typedef struct dsl_dataset {
+	/* Immutable: */
+	struct dsl_dir *ds_dir;
+	dsl_dataset_phys_t *ds_phys;
+	dmu_buf_t *ds_dbuf;
+	uint64_t ds_object;
+	uint64_t ds_fsid_guid;
+
+	/* only used in syncing context, only valid for non-snapshots: */
+	struct dsl_dataset *ds_prev;
+
+	/* has internal locking: */
+	dsl_deadlist_t ds_deadlist;
+	bplist_t ds_pending_deadlist;
+
+	/* to protect against multiple concurrent incremental recv */
+	kmutex_t ds_recvlock;
+
+	/* protected by lock on pool's dp_dirty_datasets list */
+	txg_node_t ds_dirty_link;
+	list_node_t ds_synced_link;
+
+	/*
+	 * ds_phys->ds_<accounting> is also protected by ds_lock.
+	 * Protected by ds_lock:
+	 */
+	kmutex_t ds_lock;
+	objset_t *ds_objset;
+	uint64_t ds_userrefs;
+
+	/*
+	 * ds_owner is protected by the ds_rwlock and the ds_lock
+	 */
+	krwlock_t ds_rwlock;
+	kcondvar_t ds_exclusive_cv;
+	void *ds_owner;
+
+	/* no locking; only for making guesses */
+	uint64_t ds_trysnap_txg;
+
+	/* for objset_open() */
+	kmutex_t ds_opening_lock;
+
+	uint64_t ds_reserved;	/* cached refreservation */
+	uint64_t ds_quota;	/* cached refquota */
+
+	/* Protected by ds_lock; keep at end of struct for better locality */
+	char ds_snapname[MAXNAMELEN];
+} dsl_dataset_t;
+
+struct dsl_ds_destroyarg {
+	dsl_dataset_t *ds;		/* ds to destroy */
+	dsl_dataset_t *rm_origin;	/* also remove our origin? */
+	boolean_t is_origin_rm;		/* set if removing origin snap */
+	boolean_t defer;		/* destroy -d requested? */
+	boolean_t releasing;		/* destroying due to release? */
+	boolean_t need_prep;		/* do we need to retry due to EBUSY? */
+};
+
+/*
+ * The max length of a temporary tag prefix is the number of hex digits
+ * required to express UINT64_MAX plus one for the hyphen.
+ */
+#define	MAX_TAG_PREFIX_LEN	17
+
+struct dsl_ds_holdarg {
+	dsl_sync_task_group_t *dstg;
+	char *htag;
+	char *snapname;
+	boolean_t recursive;
+	boolean_t gotone;
+	boolean_t temphold;
+	char failed[MAXPATHLEN];
+};
+
+#define	dsl_dataset_is_snapshot(ds) \
+	((ds)->ds_phys->ds_num_children != 0)
+
+#define	DS_UNIQUE_IS_ACCURATE(ds)	\
+	(((ds)->ds_phys->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
+
+int dsl_dataset_hold(const char *name, void *tag, dsl_dataset_t **dsp);
+int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj,
+    void *tag, dsl_dataset_t **);
+int dsl_dataset_own(const char *name, boolean_t inconsistentok,
+    void *tag, dsl_dataset_t **dsp);
+int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
+    boolean_t inconsistentok, void *tag, dsl_dataset_t **dsp);
+void dsl_dataset_name(dsl_dataset_t *ds, char *name);
+void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
+void dsl_dataset_disown(dsl_dataset_t *ds, void *tag);
+void dsl_dataset_drop_ref(dsl_dataset_t *ds, void *tag);
+boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, boolean_t inconsistentok,
+    void *tag);
+void dsl_dataset_make_exclusive(dsl_dataset_t *ds, void *tag);
+void dsl_register_onexit_hold_cleanup(dsl_dataset_t *ds, const char *htag,
+    minor_t minor);
+uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
+    dsl_dataset_t *origin, uint64_t flags, cred_t *, dmu_tx_t *);
+uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
+    uint64_t flags, dmu_tx_t *tx);
+int dsl_dataset_destroy(dsl_dataset_t *ds, void *tag, boolean_t defer);
+int dsl_snapshots_destroy(char *fsname, char *snapname, boolean_t defer);
+dsl_checkfunc_t dsl_dataset_destroy_check;
+dsl_syncfunc_t dsl_dataset_destroy_sync;
+dsl_checkfunc_t dsl_dataset_snapshot_check;
+dsl_syncfunc_t dsl_dataset_snapshot_sync;
+dsl_syncfunc_t dsl_dataset_user_hold_sync;
+int dsl_dataset_rename(char *name, const char *newname, boolean_t recursive);
+int dsl_dataset_promote(const char *name, char *conflsnap);
+int dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head,
+    boolean_t force);
+int dsl_dataset_user_hold(char *dsname, char *snapname, char *htag,
+    boolean_t recursive, boolean_t temphold, int cleanup_fd);
+int dsl_dataset_user_hold_for_send(dsl_dataset_t *ds, char *htag,
+    boolean_t temphold);
+int dsl_dataset_user_release(char *dsname, char *snapname, char *htag,
+    boolean_t recursive);
+int dsl_dataset_user_release_tmp(struct dsl_pool *dp, uint64_t dsobj,
+    char *htag, boolean_t retry);
+int dsl_dataset_get_holds(const char *dsname, nvlist_t **nvp);
+
+blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
+void dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx);
+
+spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds);
+
+boolean_t dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds);
+
+void dsl_dataset_sync(dsl_dataset_t *os, zio_t *zio, dmu_tx_t *tx);
+
+void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp,
+    dmu_tx_t *tx);
+int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp,
+    dmu_tx_t *tx, boolean_t async);
+boolean_t dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp,
+    uint64_t blk_birth);
+uint64_t dsl_dataset_prev_snap_txg(dsl_dataset_t *ds);
+
+void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx);
+void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv);
+void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat);
+void dsl_dataset_space(dsl_dataset_t *ds,
+    uint64_t *refdbytesp, uint64_t *availbytesp,
+    uint64_t *usedobjsp, uint64_t *availobjsp);
+uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
+
+int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf);
+
+int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
+    uint64_t asize, uint64_t inflight, uint64_t *used,
+    uint64_t *ref_rsrv);
+int dsl_dataset_set_quota(const char *dsname, zprop_source_t source,
+    uint64_t quota);
+dsl_syncfunc_t dsl_dataset_set_quota_sync;
+int dsl_dataset_set_reservation(const char *dsname, zprop_source_t source,
+    uint64_t reservation);
+
+int dsl_destroy_inconsistent(const char *dsname, void *arg);
+
+#ifdef ZFS_DEBUG
+#define	dprintf_ds(ds, fmt, ...) do { \
+	if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
+	char *__ds_name = kmem_alloc(MAXNAMELEN, KM_SLEEP); \
+	dsl_dataset_name(ds, __ds_name); \
+	dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
+	kmem_free(__ds_name, MAXNAMELEN); \
+	} \
+_NOTE(CONSTCOND) } while (0)
+#else
+#define	dprintf_ds(dd, fmt, ...)
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_DSL_DATASET_H */
diff --git a/uts/common/fs/zfs/sys/dsl_deadlist.h b/uts/common/fs/zfs/sys/dsl_deadlist.h
new file mode 100644
index 000000000000..d2c16d72c17e
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dsl_deadlist.h
@@ -0,0 +1,87 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_DSL_DEADLIST_H
+#define	_SYS_DSL_DEADLIST_H
+
+#include <sys/bpobj.h>
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct dmu_buf;
+struct dsl_dataset;
+
+typedef struct dsl_deadlist_phys {
+	uint64_t dl_used;
+	uint64_t dl_comp;
+	uint64_t dl_uncomp;
+	uint64_t dl_pad[37]; /* pad out to 320b for future expansion */
+} dsl_deadlist_phys_t;
+
+typedef struct dsl_deadlist {
+	objset_t *dl_os;
+	uint64_t dl_object;
+	avl_tree_t dl_tree;
+	boolean_t dl_havetree;
+	struct dmu_buf *dl_dbuf;
+	dsl_deadlist_phys_t *dl_phys;
+	kmutex_t dl_lock;
+
+	/* if it's the old on-disk format: */
+	bpobj_t dl_bpobj;
+	boolean_t dl_oldfmt;
+} dsl_deadlist_t;
+
+typedef struct dsl_deadlist_entry {
+	avl_node_t dle_node;
+	uint64_t dle_mintxg;
+	bpobj_t dle_bpobj;
+} dsl_deadlist_entry_t;
+
+void dsl_deadlist_open(dsl_deadlist_t *dl, objset_t *os, uint64_t object);
+void dsl_deadlist_close(dsl_deadlist_t *dl);
+uint64_t dsl_deadlist_alloc(objset_t *os, dmu_tx_t *tx);
+void dsl_deadlist_free(objset_t *os, uint64_t dlobj, dmu_tx_t *tx);
+void dsl_deadlist_insert(dsl_deadlist_t *dl, const blkptr_t *bp, dmu_tx_t *tx);
+void dsl_deadlist_add_key(dsl_deadlist_t *dl, uint64_t mintxg, dmu_tx_t *tx);
+void dsl_deadlist_remove_key(dsl_deadlist_t *dl, uint64_t mintxg, dmu_tx_t *tx);
+uint64_t dsl_deadlist_clone(dsl_deadlist_t *dl, uint64_t maxtxg,
+    uint64_t mrs_obj, dmu_tx_t *tx);
+void dsl_deadlist_space(dsl_deadlist_t *dl,
+    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
+void dsl_deadlist_space_range(dsl_deadlist_t *dl,
+    uint64_t mintxg, uint64_t maxtxg,
+    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
+void dsl_deadlist_merge(dsl_deadlist_t *dl, uint64_t obj, dmu_tx_t *tx);
+void dsl_deadlist_move_bpobj(dsl_deadlist_t *dl, bpobj_t *bpo, uint64_t mintxg,
+    dmu_tx_t *tx);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_DSL_DEADLIST_H */
diff --git a/uts/common/fs/zfs/sys/dsl_deleg.h b/uts/common/fs/zfs/sys/dsl_deleg.h
new file mode 100644
index 000000000000..73c43bd23879
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dsl_deleg.h
@@ -0,0 +1,78 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_DSL_DELEG_H
+#define	_SYS_DSL_DELEG_H
+
+#include <sys/dmu.h>
+#include <sys/dsl_pool.h>
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#define	ZFS_DELEG_PERM_NONE		""
+#define	ZFS_DELEG_PERM_CREATE		"create"
+#define	ZFS_DELEG_PERM_DESTROY		"destroy"
+#define	ZFS_DELEG_PERM_SNAPSHOT		"snapshot"
+#define	ZFS_DELEG_PERM_ROLLBACK		"rollback"
+#define	ZFS_DELEG_PERM_CLONE		"clone"
+#define	ZFS_DELEG_PERM_PROMOTE		"promote"
+#define	ZFS_DELEG_PERM_RENAME		"rename"
+#define	ZFS_DELEG_PERM_MOUNT		"mount"
+#define	ZFS_DELEG_PERM_SHARE		"share"
+#define	ZFS_DELEG_PERM_SEND		"send"
+#define	ZFS_DELEG_PERM_RECEIVE		"receive"
+#define	ZFS_DELEG_PERM_ALLOW		"allow"
+#define	ZFS_DELEG_PERM_USERPROP		"userprop"
+#define	ZFS_DELEG_PERM_VSCAN		"vscan"
+#define	ZFS_DELEG_PERM_USERQUOTA	"userquota"
+#define	ZFS_DELEG_PERM_GROUPQUOTA	"groupquota"
+#define	ZFS_DELEG_PERM_USERUSED		"userused"
+#define	ZFS_DELEG_PERM_GROUPUSED	"groupused"
+#define	ZFS_DELEG_PERM_HOLD		"hold"
+#define	ZFS_DELEG_PERM_RELEASE		"release"
+#define	ZFS_DELEG_PERM_DIFF		"diff"
+
+/*
+ * Note: the names of properties that are marked delegatable are also
+ * valid delegated permissions
+ */
+
+int dsl_deleg_get(const char *ddname, nvlist_t **nvp);
+int dsl_deleg_set(const char *ddname, nvlist_t *nvp, boolean_t unset);
+int dsl_deleg_access(const char *ddname, const char *perm, cred_t *cr);
+int dsl_deleg_access_impl(struct dsl_dataset *ds, const char *perm, cred_t *cr);
+void dsl_deleg_set_create_perms(dsl_dir_t *dd, dmu_tx_t *tx, cred_t *cr);
+int dsl_deleg_can_allow(char *ddname, nvlist_t *nvp, cred_t *cr);
+int dsl_deleg_can_unallow(char *ddname, nvlist_t *nvp, cred_t *cr);
+int dsl_deleg_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx);
+boolean_t dsl_delegation_on(objset_t *os);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_DSL_DELEG_H */
diff --git a/uts/common/fs/zfs/sys/dsl_dir.h b/uts/common/fs/zfs/sys/dsl_dir.h
new file mode 100644
index 000000000000..2191635dd813
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dsl_dir.h
@@ -0,0 +1,167 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_DSL_DIR_H
+#define	_SYS_DSL_DIR_H
+
+#include <sys/dmu.h>
+#include <sys/dsl_pool.h>
+#include <sys/dsl_synctask.h>
+#include <sys/refcount.h>
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct dsl_dataset;
+
+typedef enum dd_used {
+	DD_USED_HEAD,
+	DD_USED_SNAP,
+	DD_USED_CHILD,
+	DD_USED_CHILD_RSRV,
+	DD_USED_REFRSRV,
+	DD_USED_NUM
+} dd_used_t;
+
+#define	DD_FLAG_USED_BREAKDOWN (1<<0)
+
+typedef struct dsl_dir_phys {
+	uint64_t dd_creation_time; /* not actually used */
+	uint64_t dd_head_dataset_obj;
+	uint64_t dd_parent_obj;
+	uint64_t dd_origin_obj;
+	uint64_t dd_child_dir_zapobj;
+	/*
+	 * how much space our children are accounting for; for leaf
+	 * datasets, == physical space used by fs + snaps
+	 */
+	uint64_t dd_used_bytes;
+	uint64_t dd_compressed_bytes;
+	uint64_t dd_uncompressed_bytes;
+	/* Administrative quota setting */
+	uint64_t dd_quota;
+	/* Administrative reservation setting */
+	uint64_t dd_reserved;
+	uint64_t dd_props_zapobj;
+	uint64_t dd_deleg_zapobj; /* dataset delegation permissions */
+	uint64_t dd_flags;
+	uint64_t dd_used_breakdown[DD_USED_NUM];
+	uint64_t dd_clones; /* dsl_dir objects */
+	uint64_t dd_pad[13]; /* pad out to 256 bytes for good measure */
+} dsl_dir_phys_t;
+
+struct dsl_dir {
+	/* These are immutable; no lock needed: */
+	uint64_t dd_object;
+	dsl_dir_phys_t *dd_phys;
+	dmu_buf_t *dd_dbuf;
+	dsl_pool_t *dd_pool;
+
+	/* protected by lock on pool's dp_dirty_dirs list */
+	txg_node_t dd_dirty_link;
+
+	/* protected by dp_config_rwlock */
+	dsl_dir_t *dd_parent;
+
+	/* Protected by dd_lock */
+	kmutex_t dd_lock;
+	list_t dd_prop_cbs; /* list of dsl_prop_cb_record_t's */
+	timestruc_t dd_snap_cmtime; /* last time snapshot namespace changed */
+	uint64_t dd_origin_txg;
+
+	/* gross estimate of space used by in-flight tx's */
+	uint64_t dd_tempreserved[TXG_SIZE];
+	/* amount of space we expect to write; == amount of dirty data */
+	int64_t dd_space_towrite[TXG_SIZE];
+
+	/* protected by dd_lock; keep at end of struct for better locality */
+	char dd_myname[MAXNAMELEN];
+};
+
+void dsl_dir_close(dsl_dir_t *dd, void *tag);
+int dsl_dir_open(const char *name, void *tag, dsl_dir_t **, const char **tail);
+int dsl_dir_open_spa(spa_t *spa, const char *name, void *tag, dsl_dir_t **,
+    const char **tailp);
+int dsl_dir_open_obj(dsl_pool_t *dp, uint64_t ddobj,
+    const char *tail, void *tag, dsl_dir_t **);
+void dsl_dir_name(dsl_dir_t *dd, char *buf);
+int dsl_dir_namelen(dsl_dir_t *dd);
+uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds,
+    const char *name, dmu_tx_t *tx);
+dsl_checkfunc_t dsl_dir_destroy_check;
+dsl_syncfunc_t dsl_dir_destroy_sync;
+void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv);
+uint64_t dsl_dir_space_available(dsl_dir_t *dd,
+    dsl_dir_t *ancestor, int64_t delta, int ondiskonly);
+void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx);
+void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx);
+int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem,
+    uint64_t asize, uint64_t fsize, uint64_t usize, void **tr_cookiep,
+    dmu_tx_t *tx);
+void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx);
+void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx);
+void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type,
+    int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx);
+void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta,
+    dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx);
+int dsl_dir_set_quota(const char *ddname, zprop_source_t source,
+    uint64_t quota);
+int dsl_dir_set_reservation(const char *ddname, zprop_source_t source,
+    uint64_t reservation);
+int dsl_dir_rename(dsl_dir_t *dd, const char *newname);
+int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, uint64_t space);
+int dsl_dir_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx);
+boolean_t dsl_dir_is_clone(dsl_dir_t *dd);
+void dsl_dir_new_refreservation(dsl_dir_t *dd, struct dsl_dataset *ds,
+    uint64_t reservation, cred_t *cr, dmu_tx_t *tx);
+void dsl_dir_snap_cmtime_update(dsl_dir_t *dd);
+timestruc_t dsl_dir_snap_cmtime(dsl_dir_t *dd);
+
+/* internal reserved dir name */
+#define	MOS_DIR_NAME "$MOS"
+#define	ORIGIN_DIR_NAME "$ORIGIN"
+#define	XLATION_DIR_NAME "$XLATION"
+#define	FREE_DIR_NAME "$FREE"
+
+#ifdef ZFS_DEBUG
+#define	dprintf_dd(dd, fmt, ...) do { \
+	if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
+	char *__ds_name = kmem_alloc(MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, \
+	    KM_SLEEP); \
+	dsl_dir_name(dd, __ds_name); \
+	dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \
+	kmem_free(__ds_name, MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); \
+	} \
+_NOTE(CONSTCOND) } while (0)
+#else
+#define	dprintf_dd(dd, fmt, ...)
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_DSL_DIR_H */
diff --git a/uts/common/fs/zfs/sys/dsl_pool.h b/uts/common/fs/zfs/sys/dsl_pool.h
new file mode 100644
index 000000000000..7d25bd7c020d
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dsl_pool.h
@@ -0,0 +1,151 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_DSL_POOL_H
+#define	_SYS_DSL_POOL_H
+
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/txg_impl.h>
+#include <sys/zfs_context.h>
+#include <sys/zio.h>
+#include <sys/dnode.h>
+#include <sys/ddt.h>
+#include <sys/arc.h>
+#include <sys/bpobj.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct objset;
+struct dsl_dir;
+struct dsl_dataset;
+struct dsl_pool;
+struct dmu_tx;
+struct dsl_scan;
+
+/* These macros are for indexing into the zfs_all_blkstats_t. */
+#define	DMU_OT_DEFERRED	DMU_OT_NONE
+#define	DMU_OT_TOTAL	DMU_OT_NUMTYPES
+
+typedef struct zfs_blkstat {
+	uint64_t	zb_count;
+	uint64_t	zb_asize;
+	uint64_t	zb_lsize;
+	uint64_t	zb_psize;
+	uint64_t	zb_gangs;
+	uint64_t	zb_ditto_2_of_2_samevdev;
+	uint64_t	zb_ditto_2_of_3_samevdev;
+	uint64_t	zb_ditto_3_of_3_samevdev;
+} zfs_blkstat_t;
+
+typedef struct zfs_all_blkstats {
+	zfs_blkstat_t	zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
+} zfs_all_blkstats_t;
+
+
+typedef struct dsl_pool {
+	/* Immutable */
+	spa_t *dp_spa;
+	struct objset *dp_meta_objset;
+	struct dsl_dir *dp_root_dir;
+	struct dsl_dir *dp_mos_dir;
+	struct dsl_dir *dp_free_dir;
+	struct dsl_dataset *dp_origin_snap;
+	uint64_t dp_root_dir_obj;
+	struct taskq *dp_vnrele_taskq;
+
+	/* No lock needed - sync context only */
+	blkptr_t dp_meta_rootbp;
+	list_t dp_synced_datasets;
+	hrtime_t dp_read_overhead;
+	uint64_t dp_throughput; /* bytes per millisec */
+	uint64_t dp_write_limit;
+	uint64_t dp_tmp_userrefs_obj;
+	bpobj_t dp_free_bpobj;
+
+	struct dsl_scan *dp_scan;
+
+	/* Uses dp_lock */
+	kmutex_t dp_lock;
+	uint64_t dp_space_towrite[TXG_SIZE];
+	uint64_t dp_tempreserved[TXG_SIZE];
+
+	/* Has its own locking */
+	tx_state_t dp_tx;
+	txg_list_t dp_dirty_datasets;
+	txg_list_t dp_dirty_dirs;
+	txg_list_t dp_sync_tasks;
+
+	/*
+	 * Protects administrative changes (properties, namespace)
+	 * It is only held for write in syncing context.  Therefore
+	 * syncing context does not need to ever have it for read, since
+	 * nobody else could possibly have it for write.
+	 */
+	krwlock_t dp_config_rwlock;
+
+	zfs_all_blkstats_t *dp_blkstats;
+} dsl_pool_t;
+
+int dsl_pool_open(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
+void dsl_pool_close(dsl_pool_t *dp);
+dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
+void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
+void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
+int dsl_pool_sync_context(dsl_pool_t *dp);
+uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
+uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree);
+int dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx);
+void dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
+void dsl_pool_memory_pressure(dsl_pool_t *dp);
+void dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
+void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
+void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
+    const blkptr_t *bpp);
+int dsl_read(zio_t *pio, spa_t *spa, const blkptr_t *bpp, arc_buf_t *pbuf,
+    arc_done_func_t *done, void *private, int priority, int zio_flags,
+    uint32_t *arc_flags, const zbookmark_t *zb);
+int dsl_read_nolock(zio_t *pio, spa_t *spa, const blkptr_t *bpp,
+    arc_done_func_t *done, void *private, int priority, int zio_flags,
+    uint32_t *arc_flags, const zbookmark_t *zb);
+void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
+void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
+void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
+
+taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
+
+extern int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
+    const char *tag, uint64_t *now, dmu_tx_t *tx);
+extern int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
+    const char *tag, dmu_tx_t *tx);
+extern void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
+int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_DSL_POOL_H */
diff --git a/uts/common/fs/zfs/sys/dsl_prop.h b/uts/common/fs/zfs/sys/dsl_prop.h
new file mode 100644
index 000000000000..a636ad35096b
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dsl_prop.h
@@ -0,0 +1,119 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_DSL_PROP_H
+#define	_SYS_DSL_PROP_H
+
+#include <sys/dmu.h>
+#include <sys/dsl_pool.h>
+#include <sys/zfs_context.h>
+#include <sys/dsl_synctask.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct dsl_dataset;
+struct dsl_dir;
+
+/* The callback func may not call into the DMU or DSL! */
+typedef void (dsl_prop_changed_cb_t)(void *arg, uint64_t newval);
+
+typedef struct dsl_prop_cb_record {
+	list_node_t cbr_node; /* link on dd_prop_cbs */
+	struct dsl_dataset *cbr_ds;
+	const char *cbr_propname;
+	dsl_prop_changed_cb_t *cbr_func;
+	void *cbr_arg;
+} dsl_prop_cb_record_t;
+
+typedef struct dsl_props_arg {
+	nvlist_t *pa_props;
+	zprop_source_t pa_source;
+} dsl_props_arg_t;
+
+typedef struct dsl_prop_set_arg {
+	const char *psa_name;
+	zprop_source_t psa_source;
+	int psa_intsz;
+	int psa_numints;
+	const void *psa_value;
+
+	/*
+	 * Used to handle the special requirements of the quota and reservation
+	 * properties.
+	 */
+	uint64_t psa_effective_value;
+} dsl_prop_setarg_t;
+
+int dsl_prop_register(struct dsl_dataset *ds, const char *propname,
+    dsl_prop_changed_cb_t *callback, void *cbarg);
+int dsl_prop_unregister(struct dsl_dataset *ds, const char *propname,
+    dsl_prop_changed_cb_t *callback, void *cbarg);
+int dsl_prop_numcb(struct dsl_dataset *ds);
+
+int dsl_prop_get(const char *ddname, const char *propname,
+    int intsz, int numints, void *buf, char *setpoint);
+int dsl_prop_get_integer(const char *ddname, const char *propname,
+    uint64_t *valuep, char *setpoint);
+int dsl_prop_get_all(objset_t *os, nvlist_t **nvp);
+int dsl_prop_get_received(objset_t *os, nvlist_t **nvp);
+int dsl_prop_get_ds(struct dsl_dataset *ds, const char *propname,
+    int intsz, int numints, void *buf, char *setpoint);
+int dsl_prop_get_dd(struct dsl_dir *dd, const char *propname,
+    int intsz, int numints, void *buf, char *setpoint,
+    boolean_t snapshot);
+
+dsl_syncfunc_t dsl_props_set_sync;
+int dsl_prop_set(const char *ddname, const char *propname,
+    zprop_source_t source, int intsz, int numints, const void *buf);
+int dsl_props_set(const char *dsname, zprop_source_t source, nvlist_t *nvl);
+void dsl_dir_prop_set_uint64_sync(dsl_dir_t *dd, const char *name, uint64_t val,
+    dmu_tx_t *tx);
+
+void dsl_prop_setarg_init_uint64(dsl_prop_setarg_t *psa, const char *propname,
+    zprop_source_t source, uint64_t *value);
+int dsl_prop_predict_sync(dsl_dir_t *dd, dsl_prop_setarg_t *psa);
+#ifdef	ZFS_DEBUG
+void dsl_prop_check_prediction(dsl_dir_t *dd, dsl_prop_setarg_t *psa);
+#define	DSL_PROP_CHECK_PREDICTION(dd, psa)	\
+	dsl_prop_check_prediction((dd), (psa))
+#else
+#define	DSL_PROP_CHECK_PREDICTION(dd, psa)	/* nothing */
+#endif
+
+/* flag first receive on or after SPA_VERSION_RECVD_PROPS */
+boolean_t dsl_prop_get_hasrecvd(objset_t *os);
+void dsl_prop_set_hasrecvd(objset_t *os);
+void dsl_prop_unset_hasrecvd(objset_t *os);
+
+void dsl_prop_nvlist_add_uint64(nvlist_t *nv, zfs_prop_t prop, uint64_t value);
+void dsl_prop_nvlist_add_string(nvlist_t *nv,
+    zfs_prop_t prop, const char *value);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_DSL_PROP_H */
diff --git a/uts/common/fs/zfs/sys/dsl_scan.h b/uts/common/fs/zfs/sys/dsl_scan.h
new file mode 100644
index 000000000000..c79666e67de0
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dsl_scan.h
@@ -0,0 +1,108 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_DSL_SCAN_H
+#define	_SYS_DSL_SCAN_H
+
+#include <sys/zfs_context.h>
+#include <sys/zio.h>
+#include <sys/ddt.h>
+#include <sys/bplist.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct objset;
+struct dsl_dir;
+struct dsl_dataset;
+struct dsl_pool;
+struct dmu_tx;
+
+/*
+ * All members of this structure must be uint64_t, for byteswap
+ * purposes.
+ */
+typedef struct dsl_scan_phys {
+	uint64_t scn_func; /* pool_scan_func_t */
+	uint64_t scn_state; /* dsl_scan_state_t */
+	uint64_t scn_queue_obj;
+	uint64_t scn_min_txg;
+	uint64_t scn_max_txg;
+	uint64_t scn_cur_min_txg;
+	uint64_t scn_cur_max_txg;
+	uint64_t scn_start_time;
+	uint64_t scn_end_time;
+	uint64_t scn_to_examine; /* total bytes to be scanned */
+	uint64_t scn_examined; /* bytes scanned so far */
+	uint64_t scn_to_process;
+	uint64_t scn_processed;
+	uint64_t scn_errors;	/* scan I/O error count */
+	uint64_t scn_ddt_class_max;
+	ddt_bookmark_t scn_ddt_bookmark;
+	zbookmark_t scn_bookmark;
+	uint64_t scn_flags; /* dsl_scan_flags_t */
+} dsl_scan_phys_t;
+
+#define	SCAN_PHYS_NUMINTS (sizeof (dsl_scan_phys_t) / sizeof (uint64_t))
+
+typedef enum dsl_scan_flags {
+	DSF_VISIT_DS_AGAIN = 1<<0,
+} dsl_scan_flags_t;
+
+typedef struct dsl_scan {
+	struct dsl_pool *scn_dp;
+
+	boolean_t scn_pausing;
+	uint64_t scn_restart_txg;
+	uint64_t scn_sync_start_time;
+	zio_t *scn_zio_root;
+
+	/* for debugging / information */
+	uint64_t scn_visited_this_txg;
+
+	dsl_scan_phys_t scn_phys;
+} dsl_scan_t;
+
+int dsl_scan_init(struct dsl_pool *dp, uint64_t txg);
+void dsl_scan_fini(struct dsl_pool *dp);
+void dsl_scan_sync(struct dsl_pool *, dmu_tx_t *);
+int dsl_scan_cancel(struct dsl_pool *);
+int dsl_scan(struct dsl_pool *, pool_scan_func_t);
+void dsl_resilver_restart(struct dsl_pool *, uint64_t txg);
+boolean_t dsl_scan_resilvering(struct dsl_pool *dp);
+boolean_t dsl_dataset_unstable(struct dsl_dataset *ds);
+void dsl_scan_ddt_entry(dsl_scan_t *scn, enum zio_checksum checksum,
+    ddt_entry_t *dde, dmu_tx_t *tx);
+void dsl_scan_ds_destroyed(struct dsl_dataset *ds, struct dmu_tx *tx);
+void dsl_scan_ds_snapshotted(struct dsl_dataset *ds, struct dmu_tx *tx);
+void dsl_scan_ds_clone_swapped(struct dsl_dataset *ds1, struct dsl_dataset *ds2,
+    struct dmu_tx *tx);
+boolean_t dsl_scan_active(dsl_scan_t *scn);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_DSL_SCAN_H */
diff --git a/uts/common/fs/zfs/sys/dsl_synctask.h b/uts/common/fs/zfs/sys/dsl_synctask.h
new file mode 100644
index 000000000000..9126290cdb5b
--- /dev/null
+++ b/uts/common/fs/zfs/sys/dsl_synctask.h
@@ -0,0 +1,79 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_DSL_SYNCTASK_H
+#define	_SYS_DSL_SYNCTASK_H
+
+#include <sys/txg.h>
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct dsl_pool;
+
+typedef int (dsl_checkfunc_t)(void *, void *, dmu_tx_t *);
+typedef void (dsl_syncfunc_t)(void *, void *, dmu_tx_t *);
+
+typedef struct dsl_sync_task {
+	list_node_t dst_node;
+	dsl_checkfunc_t *dst_checkfunc;
+	dsl_syncfunc_t *dst_syncfunc;
+	void *dst_arg1;
+	void *dst_arg2;
+	int dst_err;
+} dsl_sync_task_t;
+
+typedef struct dsl_sync_task_group {
+	txg_node_t dstg_node;
+	list_t dstg_tasks;
+	struct dsl_pool *dstg_pool;
+	uint64_t dstg_txg;
+	int dstg_err;
+	int dstg_space;
+	boolean_t dstg_nowaiter;
+} dsl_sync_task_group_t;
+
+dsl_sync_task_group_t *dsl_sync_task_group_create(struct dsl_pool *dp);
+void dsl_sync_task_create(dsl_sync_task_group_t *dstg,
+    dsl_checkfunc_t *, dsl_syncfunc_t *,
+    void *arg1, void *arg2, int blocks_modified);
+int dsl_sync_task_group_wait(dsl_sync_task_group_t *dstg);
+void dsl_sync_task_group_nowait(dsl_sync_task_group_t *dstg, dmu_tx_t *tx);
+void dsl_sync_task_group_destroy(dsl_sync_task_group_t *dstg);
+void dsl_sync_task_group_sync(dsl_sync_task_group_t *dstg, dmu_tx_t *tx);
+
+int dsl_sync_task_do(struct dsl_pool *dp,
+    dsl_checkfunc_t *checkfunc, dsl_syncfunc_t *syncfunc,
+    void *arg1, void *arg2, int blocks_modified);
+void dsl_sync_task_do_nowait(struct dsl_pool *dp,
+    dsl_checkfunc_t *checkfunc, dsl_syncfunc_t *syncfunc,
+    void *arg1, void *arg2, int blocks_modified, dmu_tx_t *tx);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_DSL_SYNCTASK_H */
diff --git a/uts/common/fs/zfs/sys/metaslab.h b/uts/common/fs/zfs/sys/metaslab.h
new file mode 100644
index 000000000000..583d6303bd5a
--- /dev/null
+++ b/uts/common/fs/zfs/sys/metaslab.h
@@ -0,0 +1,80 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_METASLAB_H
+#define	_SYS_METASLAB_H
+
+#include <sys/spa.h>
+#include <sys/space_map.h>
+#include <sys/txg.h>
+#include <sys/zio.h>
+#include <sys/avl.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+extern space_map_ops_t *zfs_metaslab_ops;
+
+extern metaslab_t *metaslab_init(metaslab_group_t *mg, space_map_obj_t *smo,
+    uint64_t start, uint64_t size, uint64_t txg);
+extern void metaslab_fini(metaslab_t *msp);
+extern void metaslab_sync(metaslab_t *msp, uint64_t txg);
+extern void metaslab_sync_done(metaslab_t *msp, uint64_t txg);
+extern void metaslab_sync_reassess(metaslab_group_t *mg);
+
+#define	METASLAB_HINTBP_FAVOR	0x0
+#define	METASLAB_HINTBP_AVOID	0x1
+#define	METASLAB_GANG_HEADER	0x2
+
+extern int metaslab_alloc(spa_t *spa, metaslab_class_t *mc, uint64_t psize,
+    blkptr_t *bp, int ncopies, uint64_t txg, blkptr_t *hintbp, int flags);
+extern void metaslab_free(spa_t *spa, const blkptr_t *bp, uint64_t txg,
+    boolean_t now);
+extern int metaslab_claim(spa_t *spa, const blkptr_t *bp, uint64_t txg);
+
+extern metaslab_class_t *metaslab_class_create(spa_t *spa,
+    space_map_ops_t *ops);
+extern void metaslab_class_destroy(metaslab_class_t *mc);
+extern int metaslab_class_validate(metaslab_class_t *mc);
+
+extern void metaslab_class_space_update(metaslab_class_t *mc,
+    int64_t alloc_delta, int64_t defer_delta,
+    int64_t space_delta, int64_t dspace_delta);
+extern uint64_t metaslab_class_get_alloc(metaslab_class_t *mc);
+extern uint64_t metaslab_class_get_space(metaslab_class_t *mc);
+extern uint64_t metaslab_class_get_dspace(metaslab_class_t *mc);
+extern uint64_t metaslab_class_get_deferred(metaslab_class_t *mc);
+
+extern metaslab_group_t *metaslab_group_create(metaslab_class_t *mc,
+    vdev_t *vd);
+extern void metaslab_group_destroy(metaslab_group_t *mg);
+extern void metaslab_group_activate(metaslab_group_t *mg);
+extern void metaslab_group_passivate(metaslab_group_t *mg);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_METASLAB_H */
diff --git a/uts/common/fs/zfs/sys/metaslab_impl.h b/uts/common/fs/zfs/sys/metaslab_impl.h
new file mode 100644
index 000000000000..07988dd51a73
--- /dev/null
+++ b/uts/common/fs/zfs/sys/metaslab_impl.h
@@ -0,0 +1,89 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_METASLAB_IMPL_H
+#define	_SYS_METASLAB_IMPL_H
+
+#include <sys/metaslab.h>
+#include <sys/space_map.h>
+#include <sys/vdev.h>
+#include <sys/txg.h>
+#include <sys/avl.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct metaslab_class {
+	spa_t			*mc_spa;
+	metaslab_group_t	*mc_rotor;
+	space_map_ops_t		*mc_ops;
+	uint64_t		mc_aliquot;
+	uint64_t		mc_alloc;	/* total allocated space */
+	uint64_t		mc_deferred;	/* total deferred frees */
+	uint64_t		mc_space;	/* total space (alloc + free) */
+	uint64_t		mc_dspace;	/* total deflated space */
+};
+
+struct metaslab_group {
+	kmutex_t		mg_lock;
+	avl_tree_t		mg_metaslab_tree;
+	uint64_t		mg_aliquot;
+	uint64_t		mg_bonus_area;
+	int64_t			mg_bias;
+	int64_t			mg_activation_count;
+	metaslab_class_t	*mg_class;
+	vdev_t			*mg_vd;
+	metaslab_group_t	*mg_prev;
+	metaslab_group_t	*mg_next;
+};
+
+/*
+ * Each metaslab's free space is tracked in space map object in the MOS,
+ * which is only updated in syncing context.  Each time we sync a txg,
+ * we append the allocs and frees from that txg to the space map object.
+ * When the txg is done syncing, metaslab_sync_done() updates ms_smo
+ * to ms_smo_syncing.  Everything in ms_smo is always safe to allocate.
+ */
+struct metaslab {
+	kmutex_t	ms_lock;	/* metaslab lock		*/
+	space_map_obj_t	ms_smo;		/* synced space map object	*/
+	space_map_obj_t	ms_smo_syncing;	/* syncing space map object	*/
+	space_map_t	ms_allocmap[TXG_SIZE];  /* allocated this txg	*/
+	space_map_t	ms_freemap[TXG_SIZE];	/* freed this txg	*/
+	space_map_t	ms_defermap[TXG_DEFER_SIZE]; /* deferred frees	*/
+	space_map_t	ms_map;		/* in-core free space map	*/
+	int64_t		ms_deferspace;	/* sum of ms_defermap[] space	*/
+	uint64_t	ms_weight;	/* weight vs. others in group	*/
+	metaslab_group_t *ms_group;	/* metaslab group		*/
+	avl_node_t	ms_group_node;	/* node in metaslab group tree	*/
+	txg_node_t	ms_txg_node;	/* per-txg dirty metaslab links	*/
+};
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_METASLAB_IMPL_H */
diff --git a/uts/common/fs/zfs/sys/refcount.h b/uts/common/fs/zfs/sys/refcount.h
new file mode 100644
index 000000000000..1752c64e3e8b
--- /dev/null
+++ b/uts/common/fs/zfs/sys/refcount.h
@@ -0,0 +1,107 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_REFCOUNT_H
+#define	_SYS_REFCOUNT_H
+
+#include <sys/inttypes.h>
+#include <sys/list.h>
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * If the reference is held only by the calling function and not any
+ * particular object, use FTAG (which is a string) for the holder_tag.
+ * Otherwise, use the object that holds the reference.
+ */
+#define	FTAG ((char *)__func__)
+
+#ifdef	ZFS_DEBUG
+typedef struct reference {
+	list_node_t ref_link;
+	void *ref_holder;
+	uint64_t ref_number;
+	uint8_t *ref_removed;
+} reference_t;
+
+typedef struct refcount {
+	kmutex_t rc_mtx;
+	list_t rc_list;
+	list_t rc_removed;
+	int64_t rc_count;
+	int64_t rc_removed_count;
+} refcount_t;
+
+/* Note: refcount_t must be initialized with refcount_create() */
+
+void refcount_create(refcount_t *rc);
+void refcount_destroy(refcount_t *rc);
+void refcount_destroy_many(refcount_t *rc, uint64_t number);
+int refcount_is_zero(refcount_t *rc);
+int64_t refcount_count(refcount_t *rc);
+int64_t refcount_add(refcount_t *rc, void *holder_tag);
+int64_t refcount_remove(refcount_t *rc, void *holder_tag);
+int64_t refcount_add_many(refcount_t *rc, uint64_t number, void *holder_tag);
+int64_t refcount_remove_many(refcount_t *rc, uint64_t number, void *holder_tag);
+void refcount_transfer(refcount_t *dst, refcount_t *src);
+
+void refcount_init(void);
+void refcount_fini(void);
+
+#else	/* ZFS_DEBUG */
+
+typedef struct refcount {
+	uint64_t rc_count;
+} refcount_t;
+
+#define	refcount_create(rc) ((rc)->rc_count = 0)
+#define	refcount_destroy(rc) ((rc)->rc_count = 0)
+#define	refcount_destroy_many(rc, number) ((rc)->rc_count = 0)
+#define	refcount_is_zero(rc) ((rc)->rc_count == 0)
+#define	refcount_count(rc) ((rc)->rc_count)
+#define	refcount_add(rc, holder) atomic_add_64_nv(&(rc)->rc_count, 1)
+#define	refcount_remove(rc, holder) atomic_add_64_nv(&(rc)->rc_count, -1)
+#define	refcount_add_many(rc, number, holder) \
+	atomic_add_64_nv(&(rc)->rc_count, number)
+#define	refcount_remove_many(rc, number, holder) \
+	atomic_add_64_nv(&(rc)->rc_count, -number)
+#define	refcount_transfer(dst, src) { \
+	uint64_t __tmp = (src)->rc_count; \
+	atomic_add_64(&(src)->rc_count, -__tmp); \
+	atomic_add_64(&(dst)->rc_count, __tmp); \
+}
+
+#define	refcount_init()
+#define	refcount_fini()
+
+#endif	/* ZFS_DEBUG */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_REFCOUNT_H */
diff --git a/uts/common/fs/zfs/sys/rrwlock.h b/uts/common/fs/zfs/sys/rrwlock.h
new file mode 100644
index 000000000000..19a43c97fc3c
--- /dev/null
+++ b/uts/common/fs/zfs/sys/rrwlock.h
@@ -0,0 +1,80 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_RR_RW_LOCK_H
+#define	_SYS_RR_RW_LOCK_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#include <sys/inttypes.h>
+#include <sys/zfs_context.h>
+#include <sys/refcount.h>
+
+/*
+ * A reader-writer lock implementation that allows re-entrant reads, but
+ * still gives writers priority on "new" reads.
+ *
+ * See rrwlock.c for more details about the implementation.
+ *
+ * Fields of the rrwlock_t structure:
+ * - rr_lock: protects modification and reading of rrwlock_t fields
+ * - rr_cv: cv for waking up readers or waiting writers
+ * - rr_writer: thread id of the current writer
+ * - rr_anon_rount: number of active anonymous readers
+ * - rr_linked_rcount: total number of non-anonymous active readers
+ * - rr_writer_wanted: a writer wants the lock
+ */
+typedef struct rrwlock {
+	kmutex_t	rr_lock;
+	kcondvar_t	rr_cv;
+	kthread_t	*rr_writer;
+	refcount_t	rr_anon_rcount;
+	refcount_t	rr_linked_rcount;
+	boolean_t	rr_writer_wanted;
+} rrwlock_t;
+
+/*
+ * 'tag' is used in reference counting tracking.  The
+ * 'tag' must be the same in a rrw_enter() as in its
+ * corresponding rrw_exit().
+ */
+void rrw_init(rrwlock_t *rrl);
+void rrw_destroy(rrwlock_t *rrl);
+void rrw_enter(rrwlock_t *rrl, krw_t rw, void *tag);
+void rrw_exit(rrwlock_t *rrl, void *tag);
+boolean_t rrw_held(rrwlock_t *rrl, krw_t rw);
+
+#define	RRW_READ_HELD(x)	rrw_held(x, RW_READER)
+#define	RRW_WRITE_HELD(x)	rrw_held(x, RW_WRITER)
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_RR_RW_LOCK_H */
diff --git a/uts/common/fs/zfs/sys/sa.h b/uts/common/fs/zfs/sys/sa.h
new file mode 100644
index 000000000000..bc89fa07d222
--- /dev/null
+++ b/uts/common/fs/zfs/sys/sa.h
@@ -0,0 +1,170 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_SA_H
+#define	_SYS_SA_H
+
+#include <sys/dmu.h>
+
+/*
+ * Currently available byteswap functions.
+ * If it all possible new attributes should used
+ * one of the already defined byteswap functions.
+ * If a new byteswap function is added then the
+ * ZPL/Pool version will need to be bumped.
+ */
+
+typedef enum sa_bswap_type {
+	SA_UINT64_ARRAY,
+	SA_UINT32_ARRAY,
+	SA_UINT16_ARRAY,
+	SA_UINT8_ARRAY,
+	SA_ACL,
+} sa_bswap_type_t;
+
+typedef uint16_t	sa_attr_type_t;
+
+/*
+ * Attribute to register support for.
+ */
+typedef struct sa_attr_reg {
+	char 			*sa_name;	/* attribute name */
+	uint16_t 		sa_length;
+	sa_bswap_type_t		sa_byteswap;	/* bswap functon enum */
+	sa_attr_type_t 		sa_attr; /* filled in during registration */
+} sa_attr_reg_t;
+
+
+typedef void (sa_data_locator_t)(void **, uint32_t *, uint32_t,
+    boolean_t, void *userptr);
+
+/*
+ * array of attributes to store.
+ *
+ * This array should be treated as opaque/private data.
+ * The SA_BULK_ADD_ATTR() macro should be used for manipulating
+ * the array.
+ *
+ * When sa_replace_all_by_template() is used the attributes
+ * will be stored in the order defined in the array, except that
+ * the attributes may be split between the bonus and the spill buffer
+ *
+ */
+typedef struct sa_bulk_attr {
+	void			*sa_data;
+	sa_data_locator_t	*sa_data_func;
+	uint16_t		sa_length;
+	sa_attr_type_t		sa_attr;
+	/* the following are private to the sa framework */
+	void 			*sa_addr;
+	uint16_t		sa_buftype;
+	uint16_t		sa_size;
+} sa_bulk_attr_t;
+
+
+/*
+ * special macro for adding entries for bulk attr support
+ * bulk - sa_bulk_attr_t
+ * count - integer that will be incremented during each add
+ * attr - attribute to manipulate
+ * func - function for accessing data.
+ * data - pointer to data.
+ * len - length of data
+ */
+
+#define	SA_ADD_BULK_ATTR(b, idx, attr, func, data, len) \
+{ \
+	b[idx].sa_attr = attr;\
+	b[idx].sa_data_func = func; \
+	b[idx].sa_data = data; \
+	b[idx++].sa_length = len; \
+}
+
+typedef struct sa_os sa_os_t;
+
+typedef enum sa_handle_type {
+	SA_HDL_SHARED,
+	SA_HDL_PRIVATE
+} sa_handle_type_t;
+
+struct sa_handle;
+typedef void *sa_lookup_tab_t;
+typedef struct sa_handle sa_handle_t;
+
+typedef void (sa_update_cb_t)(sa_handle_t *, dmu_tx_t *tx);
+
+int sa_handle_get(objset_t *, uint64_t, void *userp,
+    sa_handle_type_t, sa_handle_t **);
+int sa_handle_get_from_db(objset_t *, dmu_buf_t *, void *userp,
+    sa_handle_type_t, sa_handle_t **);
+void sa_handle_destroy(sa_handle_t *);
+int sa_buf_hold(objset_t *, uint64_t, void *, dmu_buf_t **);
+void sa_buf_rele(dmu_buf_t *, void *);
+int sa_lookup(sa_handle_t *, sa_attr_type_t, void *buf, uint32_t buflen);
+int sa_update(sa_handle_t *, sa_attr_type_t, void *buf,
+    uint32_t buflen, dmu_tx_t *);
+int sa_remove(sa_handle_t *, sa_attr_type_t, dmu_tx_t *);
+int sa_bulk_lookup(sa_handle_t *, sa_bulk_attr_t *, int count);
+int sa_bulk_lookup_locked(sa_handle_t *, sa_bulk_attr_t *, int count);
+int sa_bulk_update(sa_handle_t *, sa_bulk_attr_t *, int count, dmu_tx_t *);
+int sa_size(sa_handle_t *, sa_attr_type_t, int *);
+int sa_update_from_cb(sa_handle_t *, sa_attr_type_t,
+    uint32_t buflen, sa_data_locator_t *, void *userdata, dmu_tx_t *);
+void sa_object_info(sa_handle_t *, dmu_object_info_t *);
+void sa_object_size(sa_handle_t *, uint32_t *, u_longlong_t *);
+void sa_update_user(sa_handle_t *, sa_handle_t *);
+void *sa_get_userdata(sa_handle_t *);
+void sa_set_userp(sa_handle_t *, void *);
+dmu_buf_t *sa_get_db(sa_handle_t *);
+uint64_t sa_handle_object(sa_handle_t *);
+boolean_t sa_attr_would_spill(sa_handle_t *, sa_attr_type_t, int size);
+void sa_register_update_callback(objset_t *, sa_update_cb_t *);
+int sa_setup(objset_t *, uint64_t, sa_attr_reg_t *, int, sa_attr_type_t **);
+void sa_tear_down(objset_t *);
+int sa_replace_all_by_template(sa_handle_t *, sa_bulk_attr_t *,
+    int, dmu_tx_t *);
+int sa_replace_all_by_template_locked(sa_handle_t *, sa_bulk_attr_t *,
+    int, dmu_tx_t *);
+boolean_t sa_enabled(objset_t *);
+void sa_cache_init();
+void sa_cache_fini();
+int sa_set_sa_object(objset_t *, uint64_t);
+int sa_hdrsize(void *);
+void sa_handle_lock(sa_handle_t *);
+void sa_handle_unlock(sa_handle_t *);
+
+#ifdef _KERNEL
+int sa_lookup_uio(sa_handle_t *, sa_attr_type_t, uio_t *);
+#endif
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_SA_H */
diff --git a/uts/common/fs/zfs/sys/sa_impl.h b/uts/common/fs/zfs/sys/sa_impl.h
new file mode 100644
index 000000000000..6661e47cfc83
--- /dev/null
+++ b/uts/common/fs/zfs/sys/sa_impl.h
@@ -0,0 +1,287 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_SA_IMPL_H
+#define	_SYS_SA_IMPL_H
+
+#include <sys/dmu.h>
+#include <sys/refcount.h>
+#include <sys/list.h>
+
+/*
+ * Array of known attributes and their
+ * various characteristics.
+ */
+typedef struct sa_attr_table {
+	sa_attr_type_t	sa_attr;
+	uint8_t sa_registered;
+	uint16_t sa_length;
+	sa_bswap_type_t sa_byteswap;
+	char *sa_name;
+} sa_attr_table_t;
+
+/*
+ * Zap attribute format for attribute registration
+ *
+ * 64      56      48      40      32      24      16      8       0
+ * +-------+-------+-------+-------+-------+-------+-------+-------+
+ * |        unused         |      len      | bswap |   attr num    |
+ * +-------+-------+-------+-------+-------+-------+-------+-------+
+ *
+ * Zap attribute format for layout information.
+ *
+ * layout information is stored as an array of attribute numbers
+ * The name of the attribute is the layout number (0, 1, 2, ...)
+ *
+ * 16       0
+ * +---- ---+
+ * | attr # |
+ * +--------+
+ * | attr # |
+ * +--- ----+
+ *  ......
+ *
+ */
+
+#define	ATTR_BSWAP(x)	BF32_GET(x, 16, 8)
+#define	ATTR_LENGTH(x)	BF32_GET(x, 24, 16)
+#define	ATTR_NUM(x)	BF32_GET(x, 0, 16)
+#define	ATTR_ENCODE(x, attr, length, bswap) \
+{ \
+	BF64_SET(x, 24, 16, length); \
+	BF64_SET(x, 16, 8, bswap); \
+	BF64_SET(x, 0, 16, attr); \
+}
+
+#define	TOC_OFF(x)		BF32_GET(x, 0, 23)
+#define	TOC_ATTR_PRESENT(x)	BF32_GET(x, 31, 1)
+#define	TOC_LEN_IDX(x)		BF32_GET(x, 24, 4)
+#define	TOC_ATTR_ENCODE(x, len_idx, offset) \
+{ \
+	BF32_SET(x, 31, 1, 1); \
+	BF32_SET(x, 24, 7, len_idx); \
+	BF32_SET(x, 0, 24, offset); \
+}
+
+#define	SA_LAYOUTS	"LAYOUTS"
+#define	SA_REGISTRY	"REGISTRY"
+
+/*
+ * Each unique layout will have their own table
+ * sa_lot (layout_table)
+ */
+typedef struct sa_lot {
+	avl_node_t lot_num_node;
+	avl_node_t lot_hash_node;
+	uint64_t lot_num;
+	uint64_t lot_hash;
+	sa_attr_type_t *lot_attrs;	/* array of attr #'s */
+	uint32_t lot_var_sizes;	/* how many aren't fixed size */
+	uint32_t lot_attr_count;	/* total attr count */
+	list_t 	lot_idx_tab;	/* should be only a couple of entries */
+	int	lot_instance;	/* used with lot_hash to identify entry */
+} sa_lot_t;
+
+/* index table of offsets */
+typedef struct sa_idx_tab {
+	list_node_t	sa_next;
+	sa_lot_t	*sa_layout;
+	uint16_t	*sa_variable_lengths;
+	refcount_t	sa_refcount;
+	uint32_t	*sa_idx_tab;	/* array of offsets */
+} sa_idx_tab_t;
+
+/*
+ * Since the offset/index information into the actual data
+ * will usually be identical we can share that information with
+ * all handles that have the exact same offsets.
+ *
+ * You would typically only have a large number of different table of
+ * contents if you had a several variable sized attributes.
+ *
+ * Two AVL trees are used to track the attribute layout numbers.
+ * one is keyed by number and will be consulted when a DMU_OT_SA
+ * object is first read.  The second tree is keyed by the hash signature
+ * of the attributes and will be consulted when an attribute is added
+ * to determine if we already have an instance of that layout.  Both
+ * of these tree's are interconnected.  The only difference is that
+ * when an entry is found in the "hash" tree the list of attributes will
+ * need to be compared against the list of attributes you have in hand.
+ * The assumption is that typically attributes will just be updated and
+ * adding a completely new attribute is a very rare operation.
+ */
+struct sa_os {
+	kmutex_t 	sa_lock;
+	boolean_t	sa_need_attr_registration;
+	boolean_t	sa_force_spill;
+	uint64_t	sa_master_obj;
+	uint64_t	sa_reg_attr_obj;
+	uint64_t	sa_layout_attr_obj;
+	int		sa_num_attrs;
+	sa_attr_table_t *sa_attr_table;	 /* private attr table */
+	sa_update_cb_t	*sa_update_cb;
+	avl_tree_t	sa_layout_num_tree;  /* keyed by layout number */
+	avl_tree_t	sa_layout_hash_tree; /* keyed by layout hash value */
+	int		sa_user_table_sz;
+	sa_attr_type_t	*sa_user_table; /* user name->attr mapping table */
+};
+
+/*
+ * header for all bonus and spill buffers.
+ * The header has a fixed portion with a variable number
+ * of "lengths" depending on the number of variable sized
+ * attribues which are determined by the "layout number"
+ */
+
+#define	SA_MAGIC	0x2F505A  /* ZFS SA */
+typedef struct sa_hdr_phys {
+	uint32_t sa_magic;
+	uint16_t sa_layout_info;  /* Encoded with hdrsize and layout number */
+	uint16_t sa_lengths[1];	/* optional sizes for variable length attrs */
+	/* ... Data follows the lengths.  */
+} sa_hdr_phys_t;
+
+/*
+ * sa_hdr_phys -> sa_layout_info
+ *
+ * 16      10       0
+ * +--------+-------+
+ * | hdrsz  |layout |
+ * +--------+-------+
+ *
+ * Bits 0-10 are the layout number
+ * Bits 11-16 are the size of the header.
+ * The hdrsize is the number * 8
+ *
+ * For example.
+ * hdrsz of 1 ==> 8 byte header
+ *          2 ==> 16 byte header
+ *
+ */
+
+#define	SA_HDR_LAYOUT_NUM(hdr) BF32_GET(hdr->sa_layout_info, 0, 10)
+#define	SA_HDR_SIZE(hdr) BF32_GET_SB(hdr->sa_layout_info, 10, 16, 3, 0)
+#define	SA_HDR_LAYOUT_INFO_ENCODE(x, num, size) \
+{ \
+	BF32_SET_SB(x, 10, 6, 3, 0, size); \
+	BF32_SET(x, 0, 10, num); \
+}
+
+typedef enum sa_buf_type {
+	SA_BONUS = 1,
+	SA_SPILL = 2
+} sa_buf_type_t;
+
+typedef enum sa_data_op {
+	SA_LOOKUP,
+	SA_UPDATE,
+	SA_ADD,
+	SA_REPLACE,
+	SA_REMOVE
+} sa_data_op_t;
+
+/*
+ * Opaque handle used for most sa functions
+ *
+ * This needs to be kept as small as possible.
+ */
+
+struct sa_handle {
+	kmutex_t	sa_lock;
+	dmu_buf_t	*sa_bonus;
+	dmu_buf_t	*sa_spill;
+	objset_t	*sa_os;
+	void 		*sa_userp;
+	sa_idx_tab_t	*sa_bonus_tab;	 /* idx of bonus */
+	sa_idx_tab_t	*sa_spill_tab; /* only present if spill activated */
+};
+
+#define	SA_GET_DB(hdl, type)	\
+	(dmu_buf_impl_t *)((type == SA_BONUS) ? hdl->sa_bonus : hdl->sa_spill)
+
+#define	SA_GET_HDR(hdl, type) \
+	((sa_hdr_phys_t *)((dmu_buf_impl_t *)(SA_GET_DB(hdl, \
+	type))->db.db_data))
+
+#define	SA_IDX_TAB_GET(hdl, type) \
+	(type == SA_BONUS ? hdl->sa_bonus_tab : hdl->sa_spill_tab)
+
+#define	IS_SA_BONUSTYPE(a)	\
+	((a == DMU_OT_SA) ? B_TRUE : B_FALSE)
+
+#define	SA_BONUSTYPE_FROM_DB(db) \
+	(dmu_get_bonustype((dmu_buf_t *)db))
+
+#define	SA_BLKPTR_SPACE	(DN_MAX_BONUSLEN - sizeof (blkptr_t))
+
+#define	SA_LAYOUT_NUM(x, type) \
+	((!IS_SA_BONUSTYPE(type) ? 0 : (((IS_SA_BONUSTYPE(type)) && \
+	((SA_HDR_LAYOUT_NUM(x)) == 0)) ? 1 : SA_HDR_LAYOUT_NUM(x))))
+
+
+#define	SA_REGISTERED_LEN(sa, attr) sa->sa_attr_table[attr].sa_length
+
+#define	SA_ATTR_LEN(sa, idx, attr, hdr) ((SA_REGISTERED_LEN(sa, attr) == 0) ?\
+	hdr->sa_lengths[TOC_LEN_IDX(idx->sa_idx_tab[attr])] : \
+	SA_REGISTERED_LEN(sa, attr))
+
+#define	SA_SET_HDR(hdr, num, size) \
+	{ \
+		hdr->sa_magic = SA_MAGIC; \
+		SA_HDR_LAYOUT_INFO_ENCODE(hdr->sa_layout_info, num, size); \
+	}
+
+#define	SA_ATTR_INFO(sa, idx, hdr, attr, bulk, type, hdl) \
+	{ \
+		bulk.sa_size = SA_ATTR_LEN(sa, idx, attr, hdr); \
+		bulk.sa_buftype = type; \
+		bulk.sa_addr = \
+		    (void *)((uintptr_t)TOC_OFF(idx->sa_idx_tab[attr]) + \
+		    (uintptr_t)hdr); \
+}
+
+#define	SA_HDR_SIZE_MATCH_LAYOUT(hdr, tb) \
+	(SA_HDR_SIZE(hdr) == (sizeof (sa_hdr_phys_t) + \
+	(tb->lot_var_sizes > 1 ? P2ROUNDUP((tb->lot_var_sizes - 1) * \
+	sizeof (uint16_t), 8) : 0)))
+
+int sa_add_impl(sa_handle_t *, sa_attr_type_t,
+    uint32_t, sa_data_locator_t, void *, dmu_tx_t *);
+
+void sa_register_update_callback_locked(objset_t *, sa_update_cb_t *);
+int sa_size_locked(sa_handle_t *, sa_attr_type_t, int *);
+
+void sa_default_locator(void **, uint32_t *, uint32_t, boolean_t, void *);
+int sa_attr_size(sa_os_t *, sa_idx_tab_t *, sa_attr_type_t,
+    uint16_t *, sa_hdr_phys_t *);
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_SA_IMPL_H */
diff --git a/uts/common/fs/zfs/sys/spa.h b/uts/common/fs/zfs/sys/spa.h
new file mode 100644
index 000000000000..456ec06dc456
--- /dev/null
+++ b/uts/common/fs/zfs/sys/spa.h
@@ -0,0 +1,706 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_SPA_H
+#define	_SYS_SPA_H
+
+#include <sys/avl.h>
+#include <sys/zfs_context.h>
+#include <sys/nvpair.h>
+#include <sys/sysmacros.h>
+#include <sys/types.h>
+#include <sys/fs/zfs.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Forward references that lots of things need.
+ */
+typedef struct spa spa_t;
+typedef struct vdev vdev_t;
+typedef struct metaslab metaslab_t;
+typedef struct metaslab_group metaslab_group_t;
+typedef struct metaslab_class metaslab_class_t;
+typedef struct zio zio_t;
+typedef struct zilog zilog_t;
+typedef struct spa_aux_vdev spa_aux_vdev_t;
+typedef struct ddt ddt_t;
+typedef struct ddt_entry ddt_entry_t;
+struct dsl_pool;
+
+/*
+ * General-purpose 32-bit and 64-bit bitfield encodings.
+ */
+#define	BF32_DECODE(x, low, len)	P2PHASE((x) >> (low), 1U << (len))
+#define	BF64_DECODE(x, low, len)	P2PHASE((x) >> (low), 1ULL << (len))
+#define	BF32_ENCODE(x, low, len)	(P2PHASE((x), 1U << (len)) << (low))
+#define	BF64_ENCODE(x, low, len)	(P2PHASE((x), 1ULL << (len)) << (low))
+
+#define	BF32_GET(x, low, len)		BF32_DECODE(x, low, len)
+#define	BF64_GET(x, low, len)		BF64_DECODE(x, low, len)
+
+#define	BF32_SET(x, low, len, val)	\
+	((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
+#define	BF64_SET(x, low, len, val)	\
+	((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))
+
+#define	BF32_GET_SB(x, low, len, shift, bias)	\
+	((BF32_GET(x, low, len) + (bias)) << (shift))
+#define	BF64_GET_SB(x, low, len, shift, bias)	\
+	((BF64_GET(x, low, len) + (bias)) << (shift))
+
+#define	BF32_SET_SB(x, low, len, shift, bias, val)	\
+	BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
+#define	BF64_SET_SB(x, low, len, shift, bias, val)	\
+	BF64_SET(x, low, len, ((val) >> (shift)) - (bias))
+
+/*
+ * We currently support nine block sizes, from 512 bytes to 128K.
+ * We could go higher, but the benefits are near-zero and the cost
+ * of COWing a giant block to modify one byte would become excessive.
+ */
+#define	SPA_MINBLOCKSHIFT	9
+#define	SPA_MAXBLOCKSHIFT	17
+#define	SPA_MINBLOCKSIZE	(1ULL << SPA_MINBLOCKSHIFT)
+#define	SPA_MAXBLOCKSIZE	(1ULL << SPA_MAXBLOCKSHIFT)
+
+#define	SPA_BLOCKSIZES		(SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
+
+/*
+ * Size of block to hold the configuration data (a packed nvlist)
+ */
+#define	SPA_CONFIG_BLOCKSIZE	(1 << 14)
+
+/*
+ * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
+ * The ASIZE encoding should be at least 64 times larger (6 more bits)
+ * to support up to 4-way RAID-Z mirror mode with worst-case gang block
+ * overhead, three DVAs per bp, plus one more bit in case we do anything
+ * else that expands the ASIZE.
+ */
+#define	SPA_LSIZEBITS		16	/* LSIZE up to 32M (2^16 * 512)	*/
+#define	SPA_PSIZEBITS		16	/* PSIZE up to 32M (2^16 * 512)	*/
+#define	SPA_ASIZEBITS		24	/* ASIZE up to 64 times larger	*/
+
+/*
+ * All SPA data is represented by 128-bit data virtual addresses (DVAs).
+ * The members of the dva_t should be considered opaque outside the SPA.
+ */
+typedef struct dva {
+	uint64_t	dva_word[2];
+} dva_t;
+
+/*
+ * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
+ */
+typedef struct zio_cksum {
+	uint64_t	zc_word[4];
+} zio_cksum_t;
+
+/*
+ * Each block is described by its DVAs, time of birth, checksum, etc.
+ * The word-by-word, bit-by-bit layout of the blkptr is as follows:
+ *
+ *	64	56	48	40	32	24	16	8	0
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 0	|		vdev1		| GRID  |	  ASIZE		|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 1	|G|			 offset1				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 2	|		vdev2		| GRID  |	  ASIZE		|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 3	|G|			 offset2				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 4	|		vdev3		| GRID  |	  ASIZE		|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 5	|G|			 offset3				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 6	|BDX|lvl| type	| cksum | comp	|     PSIZE	|     LSIZE	|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 7	|			padding					|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 8	|			padding					|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 9	|			physical birth txg			|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * a	|			logical birth txg			|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * b	|			fill count				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * c	|			checksum[0]				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * d	|			checksum[1]				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * e	|			checksum[2]				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * f	|			checksum[3]				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ *
+ * Legend:
+ *
+ * vdev		virtual device ID
+ * offset	offset into virtual device
+ * LSIZE	logical size
+ * PSIZE	physical size (after compression)
+ * ASIZE	allocated size (including RAID-Z parity and gang block headers)
+ * GRID		RAID-Z layout information (reserved for future use)
+ * cksum	checksum function
+ * comp		compression function
+ * G		gang block indicator
+ * B		byteorder (endianness)
+ * D		dedup
+ * X		unused
+ * lvl		level of indirection
+ * type		DMU object type
+ * phys birth	txg of block allocation; zero if same as logical birth txg
+ * log. birth	transaction group in which the block was logically born
+ * fill count	number of non-zero blocks under this bp
+ * checksum[4]	256-bit checksum of the data this bp describes
+ */
+#define	SPA_BLKPTRSHIFT	7		/* blkptr_t is 128 bytes	*/
+#define	SPA_DVAS_PER_BP	3		/* Number of DVAs in a bp	*/
+
+typedef struct blkptr {
+	dva_t		blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */
+	uint64_t	blk_prop;	/* size, compression, type, etc	    */
+	uint64_t	blk_pad[2];	/* Extra space for the future	    */
+	uint64_t	blk_phys_birth;	/* txg when block was allocated	    */
+	uint64_t	blk_birth;	/* transaction group at birth	    */
+	uint64_t	blk_fill;	/* fill count			    */
+	zio_cksum_t	blk_cksum;	/* 256-bit checksum		    */
+} blkptr_t;
+
+/*
+ * Macros to get and set fields in a bp or DVA.
+ */
+#define	DVA_GET_ASIZE(dva)	\
+	BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
+#define	DVA_SET_ASIZE(dva, x)	\
+	BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)
+
+#define	DVA_GET_GRID(dva)	BF64_GET((dva)->dva_word[0], 24, 8)
+#define	DVA_SET_GRID(dva, x)	BF64_SET((dva)->dva_word[0], 24, 8, x)
+
+#define	DVA_GET_VDEV(dva)	BF64_GET((dva)->dva_word[0], 32, 32)
+#define	DVA_SET_VDEV(dva, x)	BF64_SET((dva)->dva_word[0], 32, 32, x)
+
+#define	DVA_GET_OFFSET(dva)	\
+	BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
+#define	DVA_SET_OFFSET(dva, x)	\
+	BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
+
+#define	DVA_GET_GANG(dva)	BF64_GET((dva)->dva_word[1], 63, 1)
+#define	DVA_SET_GANG(dva, x)	BF64_SET((dva)->dva_word[1], 63, 1, x)
+
+#define	BP_GET_LSIZE(bp)	\
+	BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
+#define	BP_SET_LSIZE(bp, x)	\
+	BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
+
+#define	BP_GET_PSIZE(bp)	\
+	BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
+#define	BP_SET_PSIZE(bp, x)	\
+	BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
+
+#define	BP_GET_COMPRESS(bp)		BF64_GET((bp)->blk_prop, 32, 8)
+#define	BP_SET_COMPRESS(bp, x)		BF64_SET((bp)->blk_prop, 32, 8, x)
+
+#define	BP_GET_CHECKSUM(bp)		BF64_GET((bp)->blk_prop, 40, 8)
+#define	BP_SET_CHECKSUM(bp, x)		BF64_SET((bp)->blk_prop, 40, 8, x)
+
+#define	BP_GET_TYPE(bp)			BF64_GET((bp)->blk_prop, 48, 8)
+#define	BP_SET_TYPE(bp, x)		BF64_SET((bp)->blk_prop, 48, 8, x)
+
+#define	BP_GET_LEVEL(bp)		BF64_GET((bp)->blk_prop, 56, 5)
+#define	BP_SET_LEVEL(bp, x)		BF64_SET((bp)->blk_prop, 56, 5, x)
+
+#define	BP_GET_PROP_BIT_61(bp)		BF64_GET((bp)->blk_prop, 61, 1)
+#define	BP_SET_PROP_BIT_61(bp, x)	BF64_SET((bp)->blk_prop, 61, 1, x)
+
+#define	BP_GET_DEDUP(bp)		BF64_GET((bp)->blk_prop, 62, 1)
+#define	BP_SET_DEDUP(bp, x)		BF64_SET((bp)->blk_prop, 62, 1, x)
+
+#define	BP_GET_BYTEORDER(bp)		(0 - BF64_GET((bp)->blk_prop, 63, 1))
+#define	BP_SET_BYTEORDER(bp, x)		BF64_SET((bp)->blk_prop, 63, 1, x)
+
+#define	BP_PHYSICAL_BIRTH(bp)		\
+	((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
+
+#define	BP_SET_BIRTH(bp, logical, physical)	\
+{						\
+	(bp)->blk_birth = (logical);		\
+	(bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
+}
+
+#define	BP_GET_ASIZE(bp)	\
+	(DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
+		DVA_GET_ASIZE(&(bp)->blk_dva[2]))
+
+#define	BP_GET_UCSIZE(bp) \
+	((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \
+	BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp))
+
+#define	BP_GET_NDVAS(bp)	\
+	(!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
+	!!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
+	!!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
+
+#define	BP_COUNT_GANG(bp)	\
+	(DVA_GET_GANG(&(bp)->blk_dva[0]) + \
+	DVA_GET_GANG(&(bp)->blk_dva[1]) + \
+	DVA_GET_GANG(&(bp)->blk_dva[2]))
+
+#define	DVA_EQUAL(dva1, dva2)	\
+	((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
+	(dva1)->dva_word[0] == (dva2)->dva_word[0])
+
+#define	BP_EQUAL(bp1, bp2)	\
+	(BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) &&	\
+	DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) &&	\
+	DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) &&	\
+	DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))
+
+#define	ZIO_CHECKSUM_EQUAL(zc1, zc2) \
+	(0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
+	((zc1).zc_word[1] - (zc2).zc_word[1]) | \
+	((zc1).zc_word[2] - (zc2).zc_word[2]) | \
+	((zc1).zc_word[3] - (zc2).zc_word[3])))
+
+#define	DVA_IS_VALID(dva)	(DVA_GET_ASIZE(dva) != 0)
+
+#define	ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3)	\
+{						\
+	(zcp)->zc_word[0] = w0;			\
+	(zcp)->zc_word[1] = w1;			\
+	(zcp)->zc_word[2] = w2;			\
+	(zcp)->zc_word[3] = w3;			\
+}
+
+#define	BP_IDENTITY(bp)		(&(bp)->blk_dva[0])
+#define	BP_IS_GANG(bp)		DVA_GET_GANG(BP_IDENTITY(bp))
+#define	BP_IS_HOLE(bp)		((bp)->blk_birth == 0)
+
+/* BP_IS_RAIDZ(bp) assumes no block compression */
+#define	BP_IS_RAIDZ(bp)		(DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
+				BP_GET_PSIZE(bp))
+
+#define	BP_ZERO(bp)				\
+{						\
+	(bp)->blk_dva[0].dva_word[0] = 0;	\
+	(bp)->blk_dva[0].dva_word[1] = 0;	\
+	(bp)->blk_dva[1].dva_word[0] = 0;	\
+	(bp)->blk_dva[1].dva_word[1] = 0;	\
+	(bp)->blk_dva[2].dva_word[0] = 0;	\
+	(bp)->blk_dva[2].dva_word[1] = 0;	\
+	(bp)->blk_prop = 0;			\
+	(bp)->blk_pad[0] = 0;			\
+	(bp)->blk_pad[1] = 0;			\
+	(bp)->blk_phys_birth = 0;		\
+	(bp)->blk_birth = 0;			\
+	(bp)->blk_fill = 0;			\
+	ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0);	\
+}
+
+/*
+ * Note: the byteorder is either 0 or -1, both of which are palindromes.
+ * This simplifies the endianness handling a bit.
+ */
+#ifdef _BIG_ENDIAN
+#define	ZFS_HOST_BYTEORDER	(0ULL)
+#else
+#define	ZFS_HOST_BYTEORDER	(-1ULL)
+#endif
+
+#define	BP_SHOULD_BYTESWAP(bp)	(BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
+
+#define	BP_SPRINTF_LEN	320
+
+/*
+ * This macro allows code sharing between zfs, libzpool, and mdb.
+ * 'func' is either snprintf() or mdb_snprintf().
+ * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line.
+ */
+#define	SPRINTF_BLKPTR(func, ws, buf, bp, type, checksum, compress)	\
+{									\
+	static const char *copyname[] =					\
+	    { "zero", "single", "double", "triple" };			\
+	int size = BP_SPRINTF_LEN;					\
+	int len = 0;							\
+	int copies = 0;							\
+									\
+	if (bp == NULL) {						\
+		len = func(buf + len, size - len, "<NULL>");		\
+	} else if (BP_IS_HOLE(bp)) {					\
+		len = func(buf + len, size - len, "<hole>");		\
+	} else {							\
+		for (int d = 0; d < BP_GET_NDVAS(bp); d++) {		\
+			const dva_t *dva = &bp->blk_dva[d];		\
+			if (DVA_IS_VALID(dva))				\
+				copies++;				\
+			len += func(buf + len, size - len,		\
+			    "DVA[%d]=<%llu:%llx:%llx>%c", d,		\
+			    (u_longlong_t)DVA_GET_VDEV(dva),		\
+			    (u_longlong_t)DVA_GET_OFFSET(dva),		\
+			    (u_longlong_t)DVA_GET_ASIZE(dva),		\
+			    ws);					\
+		}							\
+		if (BP_IS_GANG(bp) &&					\
+		    DVA_GET_ASIZE(&bp->blk_dva[2]) <=			\
+		    DVA_GET_ASIZE(&bp->blk_dva[1]) / 2)			\
+			copies--;					\
+		len += func(buf + len, size - len,			\
+		    "[L%llu %s] %s %s %s %s %s %s%c"			\
+		    "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c"	\
+		    "cksum=%llx:%llx:%llx:%llx",			\
+		    (u_longlong_t)BP_GET_LEVEL(bp),			\
+		    type,						\
+		    checksum,						\
+		    compress,						\
+		    BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE",		\
+		    BP_IS_GANG(bp) ? "gang" : "contiguous",		\
+		    BP_GET_DEDUP(bp) ? "dedup" : "unique",		\
+		    copyname[copies],					\
+		    ws,							\
+		    (u_longlong_t)BP_GET_LSIZE(bp),			\
+		    (u_longlong_t)BP_GET_PSIZE(bp),			\
+		    (u_longlong_t)bp->blk_birth,			\
+		    (u_longlong_t)BP_PHYSICAL_BIRTH(bp),		\
+		    (u_longlong_t)bp->blk_fill,				\
+		    ws,							\
+		    (u_longlong_t)bp->blk_cksum.zc_word[0],		\
+		    (u_longlong_t)bp->blk_cksum.zc_word[1],		\
+		    (u_longlong_t)bp->blk_cksum.zc_word[2],		\
+		    (u_longlong_t)bp->blk_cksum.zc_word[3]);		\
+	}								\
+	ASSERT(len < size);						\
+}
+
+#include <sys/dmu.h>
+
+#define	BP_GET_BUFC_TYPE(bp)						\
+	(((BP_GET_LEVEL(bp) > 0) || (dmu_ot[BP_GET_TYPE(bp)].ot_metadata)) ? \
+	ARC_BUFC_METADATA : ARC_BUFC_DATA);
+
+typedef enum spa_import_type {
+	SPA_IMPORT_EXISTING,
+	SPA_IMPORT_ASSEMBLE
+} spa_import_type_t;
+
+/* state manipulation functions */
+extern int spa_open(const char *pool, spa_t **, void *tag);
+extern int spa_open_rewind(const char *pool, spa_t **, void *tag,
+    nvlist_t *policy, nvlist_t **config);
+extern int spa_get_stats(const char *pool, nvlist_t **config,
+    char *altroot, size_t buflen);
+extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
+    const char *history_str, nvlist_t *zplprops);
+extern int spa_import_rootpool(char *devpath, char *devid);
+extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props,
+    uint64_t flags);
+extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
+extern int spa_destroy(char *pool);
+extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
+    boolean_t hardforce);
+extern int spa_reset(char *pool);
+extern void spa_async_request(spa_t *spa, int flag);
+extern void spa_async_unrequest(spa_t *spa, int flag);
+extern void spa_async_suspend(spa_t *spa);
+extern void spa_async_resume(spa_t *spa);
+extern spa_t *spa_inject_addref(char *pool);
+extern void spa_inject_delref(spa_t *spa);
+extern void spa_scan_stat_init(spa_t *spa);
+extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps);
+
+#define	SPA_ASYNC_CONFIG_UPDATE	0x01
+#define	SPA_ASYNC_REMOVE	0x02
+#define	SPA_ASYNC_PROBE		0x04
+#define	SPA_ASYNC_RESILVER_DONE	0x08
+#define	SPA_ASYNC_RESILVER	0x10
+#define	SPA_ASYNC_AUTOEXPAND	0x20
+#define	SPA_ASYNC_REMOVE_DONE	0x40
+#define	SPA_ASYNC_REMOVE_STOP	0x80
+
+/*
+ * Controls the behavior of spa_vdev_remove().
+ */
+#define	SPA_REMOVE_UNSPARE	0x01
+#define	SPA_REMOVE_DONE		0x02
+
+/* device manipulation */
+extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
+extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
+    int replacing);
+extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid,
+    int replace_done);
+extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
+extern boolean_t spa_vdev_remove_active(spa_t *spa);
+extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
+extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru);
+extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
+    nvlist_t *props, boolean_t exp);
+
+/* spare state (which is global across all pools) */
+extern void spa_spare_add(vdev_t *vd);
+extern void spa_spare_remove(vdev_t *vd);
+extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt);
+extern void spa_spare_activate(vdev_t *vd);
+
+/* L2ARC state (which is global across all pools) */
+extern void spa_l2cache_add(vdev_t *vd);
+extern void spa_l2cache_remove(vdev_t *vd);
+extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
+extern void spa_l2cache_activate(vdev_t *vd);
+extern void spa_l2cache_drop(spa_t *spa);
+
+/* scanning */
+extern int spa_scan(spa_t *spa, pool_scan_func_t func);
+extern int spa_scan_stop(spa_t *spa);
+
+/* spa syncing */
+extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
+extern void spa_sync_allpools(void);
+
+/*
+ * DEFERRED_FREE must be large enough that regular blocks are not
+ * deferred.  XXX so can't we change it back to 1?
+ */
+#define	SYNC_PASS_DEFERRED_FREE	2	/* defer frees after this pass */
+#define	SYNC_PASS_DONT_COMPRESS	4	/* don't compress after this pass */
+#define	SYNC_PASS_REWRITE	1	/* rewrite new bps after this pass */
+
+/* spa namespace global mutex */
+extern kmutex_t spa_namespace_lock;
+
+/*
+ * SPA configuration functions in spa_config.c
+ */
+
+#define	SPA_CONFIG_UPDATE_POOL	0
+#define	SPA_CONFIG_UPDATE_VDEVS	1
+
+extern void spa_config_sync(spa_t *, boolean_t, boolean_t);
+extern void spa_config_load(void);
+extern nvlist_t *spa_all_configs(uint64_t *);
+extern void spa_config_set(spa_t *spa, nvlist_t *config);
+extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
+    int getstats);
+extern void spa_config_update(spa_t *spa, int what);
+
+/*
+ * Miscellaneous SPA routines in spa_misc.c
+ */
+
+/* Namespace manipulation */
+extern spa_t *spa_lookup(const char *name);
+extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot);
+extern void spa_remove(spa_t *spa);
+extern spa_t *spa_next(spa_t *prev);
+
+/* Refcount functions */
+extern void spa_open_ref(spa_t *spa, void *tag);
+extern void spa_close(spa_t *spa, void *tag);
+extern boolean_t spa_refcount_zero(spa_t *spa);
+
+#define	SCL_NONE	0x00
+#define	SCL_CONFIG	0x01
+#define	SCL_STATE	0x02
+#define	SCL_L2ARC	0x04		/* hack until L2ARC 2.0 */
+#define	SCL_ALLOC	0x08
+#define	SCL_ZIO		0x10
+#define	SCL_FREE	0x20
+#define	SCL_VDEV	0x40
+#define	SCL_LOCKS	7
+#define	SCL_ALL		((1 << SCL_LOCKS) - 1)
+#define	SCL_STATE_ALL	(SCL_STATE | SCL_L2ARC | SCL_ZIO)
+
+/* Pool configuration locks */
+extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
+extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw);
+extern void spa_config_exit(spa_t *spa, int locks, void *tag);
+extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
+
+/* Pool vdev add/remove lock */
+extern uint64_t spa_vdev_enter(spa_t *spa);
+extern uint64_t spa_vdev_config_enter(spa_t *spa);
+extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg,
+    int error, char *tag);
+extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
+
+/* Pool vdev state change lock */
+extern void spa_vdev_state_enter(spa_t *spa, int oplock);
+extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error);
+
+/* Log state */
+typedef enum spa_log_state {
+	SPA_LOG_UNKNOWN = 0,	/* unknown log state */
+	SPA_LOG_MISSING,	/* missing log(s) */
+	SPA_LOG_CLEAR,		/* clear the log(s) */
+	SPA_LOG_GOOD,		/* log(s) are good */
+} spa_log_state_t;
+
+extern spa_log_state_t spa_get_log_state(spa_t *spa);
+extern void spa_set_log_state(spa_t *spa, spa_log_state_t state);
+extern int spa_offline_log(spa_t *spa);
+
+/* Log claim callback */
+extern void spa_claim_notify(zio_t *zio);
+
+/* Accessor functions */
+extern boolean_t spa_shutting_down(spa_t *spa);
+extern struct dsl_pool *spa_get_dsl(spa_t *spa);
+extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
+extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
+extern void spa_altroot(spa_t *, char *, size_t);
+extern int spa_sync_pass(spa_t *spa);
+extern char *spa_name(spa_t *spa);
+extern uint64_t spa_guid(spa_t *spa);
+extern uint64_t spa_last_synced_txg(spa_t *spa);
+extern uint64_t spa_first_txg(spa_t *spa);
+extern uint64_t spa_syncing_txg(spa_t *spa);
+extern uint64_t spa_version(spa_t *spa);
+extern pool_state_t spa_state(spa_t *spa);
+extern spa_load_state_t spa_load_state(spa_t *spa);
+extern uint64_t spa_freeze_txg(spa_t *spa);
+extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize);
+extern uint64_t spa_get_dspace(spa_t *spa);
+extern void spa_update_dspace(spa_t *spa);
+extern uint64_t spa_version(spa_t *spa);
+extern boolean_t spa_deflate(spa_t *spa);
+extern metaslab_class_t *spa_normal_class(spa_t *spa);
+extern metaslab_class_t *spa_log_class(spa_t *spa);
+extern int spa_max_replication(spa_t *spa);
+extern int spa_prev_software_version(spa_t *spa);
+extern int spa_busy(void);
+extern uint8_t spa_get_failmode(spa_t *spa);
+extern boolean_t spa_suspended(spa_t *spa);
+extern uint64_t spa_bootfs(spa_t *spa);
+extern uint64_t spa_delegation(spa_t *spa);
+extern objset_t *spa_meta_objset(spa_t *spa);
+
+/* Miscellaneous support routines */
+extern int spa_rename(const char *oldname, const char *newname);
+extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid);
+extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
+extern char *spa_strdup(const char *);
+extern void spa_strfree(char *);
+extern uint64_t spa_get_random(uint64_t range);
+extern uint64_t spa_generate_guid(spa_t *spa);
+extern void sprintf_blkptr(char *buf, const blkptr_t *bp);
+extern void spa_freeze(spa_t *spa);
+extern void spa_upgrade(spa_t *spa, uint64_t version);
+extern void spa_evict_all(void);
+extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid,
+    boolean_t l2cache);
+extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
+extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva);
+extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp);
+extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp);
+extern boolean_t spa_has_slogs(spa_t *spa);
+extern boolean_t spa_is_root(spa_t *spa);
+extern boolean_t spa_writeable(spa_t *spa);
+
+extern int spa_mode(spa_t *spa);
+extern uint64_t strtonum(const char *str, char **nptr);
+
+/* history logging */
+typedef enum history_log_type {
+	LOG_CMD_POOL_CREATE,
+	LOG_CMD_NORMAL,
+	LOG_INTERNAL
+} history_log_type_t;
+
+typedef struct history_arg {
+	char *ha_history_str;
+	history_log_type_t ha_log_type;
+	history_internal_events_t ha_event;
+	char *ha_zone;
+	uid_t ha_uid;
+} history_arg_t;
+
+extern char *spa_his_ievent_table[];
+
+extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
+extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
+    char *his_buf);
+extern int spa_history_log(spa_t *spa, const char *his_buf,
+    history_log_type_t what);
+extern void spa_history_log_internal(history_internal_events_t event,
+    spa_t *spa, dmu_tx_t *tx, const char *fmt, ...);
+extern void spa_history_log_version(spa_t *spa, history_internal_events_t evt);
+
+/* error handling */
+struct zbookmark;
+extern void spa_log_error(spa_t *spa, zio_t *zio);
+extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,
+    zio_t *zio, uint64_t stateoroffset, uint64_t length);
+extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
+extern void zfs_post_state_change(spa_t *spa, vdev_t *vd);
+extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
+extern uint64_t spa_get_errlog_size(spa_t *spa);
+extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
+extern void spa_errlog_rotate(spa_t *spa);
+extern void spa_errlog_drain(spa_t *spa);
+extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
+extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
+
+/* vdev cache */
+extern void vdev_cache_stat_init(void);
+extern void vdev_cache_stat_fini(void);
+
+/* Initialization and termination */
+extern void spa_init(int flags);
+extern void spa_fini(void);
+extern void spa_boot_init();
+
+/* properties */
+extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
+extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
+extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
+extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t);
+
+/* asynchronous event notification */
+extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
+
+#ifdef ZFS_DEBUG
+#define	dprintf_bp(bp, fmt, ...) do {				\
+	if (zfs_flags & ZFS_DEBUG_DPRINTF) { 			\
+	char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP);	\
+	sprintf_blkptr(__blkbuf, (bp));				\
+	dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf);		\
+	kmem_free(__blkbuf, BP_SPRINTF_LEN);			\
+	} \
+_NOTE(CONSTCOND) } while (0)
+#else
+#define	dprintf_bp(bp, fmt, ...)
+#endif
+
+extern int spa_mode_global;			/* mode, e.g. FREAD | FWRITE */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_SPA_H */
diff --git a/uts/common/fs/zfs/sys/spa_boot.h b/uts/common/fs/zfs/sys/spa_boot.h
new file mode 100644
index 000000000000..1d3622f5a108
--- /dev/null
+++ b/uts/common/fs/zfs/sys/spa_boot.h
@@ -0,0 +1,42 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_SPA_BOOT_H
+#define	_SYS_SPA_BOOT_H
+
+#include <sys/nvpair.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+extern char *spa_get_bootprop(char *prop);
+extern void spa_free_bootprop(char *prop);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_SPA_BOOT_H */
diff --git a/uts/common/fs/zfs/sys/spa_impl.h b/uts/common/fs/zfs/sys/spa_impl.h
new file mode 100644
index 000000000000..c965ffbbef87
--- /dev/null
+++ b/uts/common/fs/zfs/sys/spa_impl.h
@@ -0,0 +1,235 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_SPA_IMPL_H
+#define	_SYS_SPA_IMPL_H
+
+#include <sys/spa.h>
+#include <sys/vdev.h>
+#include <sys/metaslab.h>
+#include <sys/dmu.h>
+#include <sys/dsl_pool.h>
+#include <sys/uberblock_impl.h>
+#include <sys/zfs_context.h>
+#include <sys/avl.h>
+#include <sys/refcount.h>
+#include <sys/bplist.h>
+#include <sys/bpobj.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct spa_error_entry {
+	zbookmark_t	se_bookmark;
+	char		*se_name;
+	avl_node_t	se_avl;
+} spa_error_entry_t;
+
+typedef struct spa_history_phys {
+	uint64_t sh_pool_create_len;	/* ending offset of zpool create */
+	uint64_t sh_phys_max_off;	/* physical EOF */
+	uint64_t sh_bof;		/* logical BOF */
+	uint64_t sh_eof;		/* logical EOF */
+	uint64_t sh_records_lost;	/* num of records overwritten */
+} spa_history_phys_t;
+
+struct spa_aux_vdev {
+	uint64_t	sav_object;		/* MOS object for device list */
+	nvlist_t	*sav_config;		/* cached device config */
+	vdev_t		**sav_vdevs;		/* devices */
+	int		sav_count;		/* number devices */
+	boolean_t	sav_sync;		/* sync the device list */
+	nvlist_t	**sav_pending;		/* pending device additions */
+	uint_t		sav_npending;		/* # pending devices */
+};
+
+typedef struct spa_config_lock {
+	kmutex_t	scl_lock;
+	kthread_t	*scl_writer;
+	int		scl_write_wanted;
+	kcondvar_t	scl_cv;
+	refcount_t	scl_count;
+} spa_config_lock_t;
+
+typedef struct spa_config_dirent {
+	list_node_t	scd_link;
+	char		*scd_path;
+} spa_config_dirent_t;
+
+enum zio_taskq_type {
+	ZIO_TASKQ_ISSUE = 0,
+	ZIO_TASKQ_ISSUE_HIGH,
+	ZIO_TASKQ_INTERRUPT,
+	ZIO_TASKQ_INTERRUPT_HIGH,
+	ZIO_TASKQ_TYPES
+};
+
+/*
+ * State machine for the zpool-pooname process.  The states transitions
+ * are done as follows:
+ *
+ *	From		   To			Routine
+ *	PROC_NONE	-> PROC_CREATED		spa_activate()
+ *	PROC_CREATED	-> PROC_ACTIVE		spa_thread()
+ *	PROC_ACTIVE	-> PROC_DEACTIVATE	spa_deactivate()
+ *	PROC_DEACTIVATE	-> PROC_GONE		spa_thread()
+ *	PROC_GONE	-> PROC_NONE		spa_deactivate()
+ */
+typedef enum spa_proc_state {
+	SPA_PROC_NONE,		/* spa_proc = &p0, no process created */
+	SPA_PROC_CREATED,	/* spa_activate() has proc, is waiting */
+	SPA_PROC_ACTIVE,	/* taskqs created, spa_proc set */
+	SPA_PROC_DEACTIVATE,	/* spa_deactivate() requests process exit */
+	SPA_PROC_GONE		/* spa_thread() is exiting, spa_proc = &p0 */
+} spa_proc_state_t;
+
+struct spa {
+	/*
+	 * Fields protected by spa_namespace_lock.
+	 */
+	char		spa_name[MAXNAMELEN];	/* pool name */
+	avl_node_t	spa_avl;		/* node in spa_namespace_avl */
+	nvlist_t	*spa_config;		/* last synced config */
+	nvlist_t	*spa_config_syncing;	/* currently syncing config */
+	nvlist_t	*spa_config_splitting;	/* config for splitting */
+	nvlist_t	*spa_load_info;		/* info and errors from load */
+	uint64_t	spa_config_txg;		/* txg of last config change */
+	int		spa_sync_pass;		/* iterate-to-convergence */
+	pool_state_t	spa_state;		/* pool state */
+	int		spa_inject_ref;		/* injection references */
+	uint8_t		spa_sync_on;		/* sync threads are running */
+	spa_load_state_t spa_load_state;	/* current load operation */
+	uint64_t	spa_import_flags;	/* import specific flags */
+	taskq_t		*spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES];
+	dsl_pool_t	*spa_dsl_pool;
+	metaslab_class_t *spa_normal_class;	/* normal data class */
+	metaslab_class_t *spa_log_class;	/* intent log data class */
+	uint64_t	spa_first_txg;		/* first txg after spa_open() */
+	uint64_t	spa_final_txg;		/* txg of export/destroy */
+	uint64_t	spa_freeze_txg;		/* freeze pool at this txg */
+	uint64_t	spa_load_max_txg;	/* best initial ub_txg */
+	uint64_t	spa_claim_max_txg;	/* highest claimed birth txg */
+	timespec_t	spa_loaded_ts;		/* 1st successful open time */
+	objset_t	*spa_meta_objset;	/* copy of dp->dp_meta_objset */
+	txg_list_t	spa_vdev_txg_list;	/* per-txg dirty vdev list */
+	vdev_t		*spa_root_vdev;		/* top-level vdev container */
+	uint64_t	spa_load_guid;		/* initial guid for spa_load */
+	list_t		spa_config_dirty_list;	/* vdevs with dirty config */
+	list_t		spa_state_dirty_list;	/* vdevs with dirty state */
+	spa_aux_vdev_t	spa_spares;		/* hot spares */
+	spa_aux_vdev_t	spa_l2cache;		/* L2ARC cache devices */
+	uint64_t	spa_config_object;	/* MOS object for pool config */
+	uint64_t	spa_config_generation;	/* config generation number */
+	uint64_t	spa_syncing_txg;	/* txg currently syncing */
+	bpobj_t		spa_deferred_bpobj;	/* deferred-free bplist */
+	bplist_t	spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */
+	uberblock_t	spa_ubsync;		/* last synced uberblock */
+	uberblock_t	spa_uberblock;		/* current uberblock */
+	boolean_t	spa_extreme_rewind;	/* rewind past deferred frees */
+	uint64_t	spa_last_io;		/* lbolt of last non-scan I/O */
+	kmutex_t	spa_scrub_lock;		/* resilver/scrub lock */
+	uint64_t	spa_scrub_inflight;	/* in-flight scrub I/Os */
+	kcondvar_t	spa_scrub_io_cv;	/* scrub I/O completion */
+	uint8_t		spa_scrub_active;	/* active or suspended? */
+	uint8_t		spa_scrub_type;		/* type of scrub we're doing */
+	uint8_t		spa_scrub_finished;	/* indicator to rotate logs */
+	uint8_t		spa_scrub_started;	/* started since last boot */
+	uint8_t		spa_scrub_reopen;	/* scrub doing vdev_reopen */
+	uint64_t	spa_scan_pass_start;	/* start time per pass/reboot */
+	uint64_t	spa_scan_pass_exam;	/* examined bytes per pass */
+	kmutex_t	spa_async_lock;		/* protect async state */
+	kthread_t	*spa_async_thread;	/* thread doing async task */
+	int		spa_async_suspended;	/* async tasks suspended */
+	kcondvar_t	spa_async_cv;		/* wait for thread_exit() */
+	uint16_t	spa_async_tasks;	/* async task mask */
+	char		*spa_root;		/* alternate root directory */
+	uint64_t	spa_ena;		/* spa-wide ereport ENA */
+	int		spa_last_open_failed;	/* error if last open failed */
+	uint64_t	spa_last_ubsync_txg;	/* "best" uberblock txg */
+	uint64_t	spa_last_ubsync_txg_ts;	/* timestamp from that ub */
+	uint64_t	spa_load_txg;		/* ub txg that loaded */
+	uint64_t	spa_load_txg_ts;	/* timestamp from that ub */
+	uint64_t	spa_load_meta_errors;	/* verify metadata err count */
+	uint64_t	spa_load_data_errors;	/* verify data err count */
+	uint64_t	spa_verify_min_txg;	/* start txg of verify scrub */
+	kmutex_t	spa_errlog_lock;	/* error log lock */
+	uint64_t	spa_errlog_last;	/* last error log object */
+	uint64_t	spa_errlog_scrub;	/* scrub error log object */
+	kmutex_t	spa_errlist_lock;	/* error list/ereport lock */
+	avl_tree_t	spa_errlist_last;	/* last error list */
+	avl_tree_t	spa_errlist_scrub;	/* scrub error list */
+	uint64_t	spa_deflate;		/* should we deflate? */
+	uint64_t	spa_history;		/* history object */
+	kmutex_t	spa_history_lock;	/* history lock */
+	vdev_t		*spa_pending_vdev;	/* pending vdev additions */
+	kmutex_t	spa_props_lock;		/* property lock */
+	uint64_t	spa_pool_props_object;	/* object for properties */
+	uint64_t	spa_bootfs;		/* default boot filesystem */
+	uint64_t	spa_failmode;		/* failure mode for the pool */
+	uint64_t	spa_delegation;		/* delegation on/off */
+	list_t		spa_config_list;	/* previous cache file(s) */
+	zio_t		*spa_async_zio_root;	/* root of all async I/O */
+	zio_t		*spa_suspend_zio_root;	/* root of all suspended I/O */
+	kmutex_t	spa_suspend_lock;	/* protects suspend_zio_root */
+	kcondvar_t	spa_suspend_cv;		/* notification of resume */
+	uint8_t		spa_suspended;		/* pool is suspended */
+	uint8_t		spa_claiming;		/* pool is doing zil_claim() */
+	boolean_t	spa_is_root;		/* pool is root */
+	int		spa_minref;		/* num refs when first opened */
+	int		spa_mode;		/* FREAD | FWRITE */
+	spa_log_state_t spa_log_state;		/* log state */
+	uint64_t	spa_autoexpand;		/* lun expansion on/off */
+	ddt_t		*spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */
+	uint64_t	spa_ddt_stat_object;	/* DDT statistics */
+	uint64_t	spa_dedup_ditto;	/* dedup ditto threshold */
+	uint64_t	spa_dedup_checksum;	/* default dedup checksum */
+	uint64_t	spa_dspace;		/* dspace in normal class */
+	kmutex_t	spa_vdev_top_lock;	/* dueling offline/remove */
+	kmutex_t	spa_proc_lock;		/* protects spa_proc* */
+	kcondvar_t	spa_proc_cv;		/* spa_proc_state transitions */
+	spa_proc_state_t spa_proc_state;	/* see definition */
+	struct proc	*spa_proc;		/* "zpool-poolname" process */
+	uint64_t	spa_did;		/* if procp != p0, did of t1 */
+	boolean_t	spa_autoreplace;	/* autoreplace set in open */
+	int		spa_vdev_locks;		/* locks grabbed */
+	uint64_t	spa_creation_version;	/* version at pool creation */
+	uint64_t	spa_prev_software_version;
+	/*
+	 * spa_refcnt & spa_config_lock must be the last elements
+	 * because refcount_t changes size based on compilation options.
+	 * In order for the MDB module to function correctly, the other
+	 * fields must remain in the same location.
+	 */
+	spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
+	refcount_t	spa_refcount;		/* number of opens */
+};
+
+extern const char *spa_config_path;
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_SPA_IMPL_H */
diff --git a/uts/common/fs/zfs/sys/space_map.h b/uts/common/fs/zfs/sys/space_map.h
new file mode 100644
index 000000000000..6f935c9db27e
--- /dev/null
+++ b/uts/common/fs/zfs/sys/space_map.h
@@ -0,0 +1,179 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_SPACE_MAP_H
+#define	_SYS_SPACE_MAP_H
+
+#include <sys/avl.h>
+#include <sys/dmu.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct space_map_ops space_map_ops_t;
+
+typedef struct space_map {
+	avl_tree_t	sm_root;	/* AVL tree of map segments */
+	uint64_t	sm_space;	/* sum of all segments in the map */
+	uint64_t	sm_start;	/* start of map */
+	uint64_t	sm_size;	/* size of map */
+	uint8_t		sm_shift;	/* unit shift */
+	uint8_t		sm_pad[3];	/* unused */
+	uint8_t		sm_loaded;	/* map loaded? */
+	uint8_t		sm_loading;	/* map loading? */
+	kcondvar_t	sm_load_cv;	/* map load completion */
+	space_map_ops_t	*sm_ops;	/* space map block picker ops vector */
+	avl_tree_t	*sm_pp_root;	/* picker-private AVL tree */
+	void		*sm_ppd;	/* picker-private data */
+	kmutex_t	*sm_lock;	/* pointer to lock that protects map */
+} space_map_t;
+
+typedef struct space_seg {
+	avl_node_t	ss_node;	/* AVL node */
+	avl_node_t	ss_pp_node;	/* AVL picker-private node */
+	uint64_t	ss_start;	/* starting offset of this segment */
+	uint64_t	ss_end;		/* ending offset (non-inclusive) */
+} space_seg_t;
+
+typedef struct space_ref {
+	avl_node_t	sr_node;	/* AVL node */
+	uint64_t	sr_offset;	/* offset (start or end) */
+	int64_t		sr_refcnt;	/* associated reference count */
+} space_ref_t;
+
+typedef struct space_map_obj {
+	uint64_t	smo_object;	/* on-disk space map object */
+	uint64_t	smo_objsize;	/* size of the object */
+	uint64_t	smo_alloc;	/* space allocated from the map */
+} space_map_obj_t;
+
+struct space_map_ops {
+	void	(*smop_load)(space_map_t *sm);
+	void	(*smop_unload)(space_map_t *sm);
+	uint64_t (*smop_alloc)(space_map_t *sm, uint64_t size);
+	void	(*smop_claim)(space_map_t *sm, uint64_t start, uint64_t size);
+	void	(*smop_free)(space_map_t *sm, uint64_t start, uint64_t size);
+	uint64_t (*smop_max)(space_map_t *sm);
+	boolean_t (*smop_fragmented)(space_map_t *sm);
+};
+
+/*
+ * debug entry
+ *
+ *    1      3         10                     50
+ *  ,---+--------+------------+---------------------------------.
+ *  | 1 | action |  syncpass  |        txg (lower bits)         |
+ *  `---+--------+------------+---------------------------------'
+ *   63  62    60 59        50 49                               0
+ *
+ *
+ *
+ * non-debug entry
+ *
+ *    1               47                   1           15
+ *  ,-----------------------------------------------------------.
+ *  | 0 |   offset (sm_shift units)    | type |       run       |
+ *  `-----------------------------------------------------------'
+ *   63  62                          17   16   15               0
+ */
+
+/* All this stuff takes and returns bytes */
+#define	SM_RUN_DECODE(x)	(BF64_DECODE(x, 0, 15) + 1)
+#define	SM_RUN_ENCODE(x)	BF64_ENCODE((x) - 1, 0, 15)
+#define	SM_TYPE_DECODE(x)	BF64_DECODE(x, 15, 1)
+#define	SM_TYPE_ENCODE(x)	BF64_ENCODE(x, 15, 1)
+#define	SM_OFFSET_DECODE(x)	BF64_DECODE(x, 16, 47)
+#define	SM_OFFSET_ENCODE(x)	BF64_ENCODE(x, 16, 47)
+#define	SM_DEBUG_DECODE(x)	BF64_DECODE(x, 63, 1)
+#define	SM_DEBUG_ENCODE(x)	BF64_ENCODE(x, 63, 1)
+
+#define	SM_DEBUG_ACTION_DECODE(x)	BF64_DECODE(x, 60, 3)
+#define	SM_DEBUG_ACTION_ENCODE(x)	BF64_ENCODE(x, 60, 3)
+
+#define	SM_DEBUG_SYNCPASS_DECODE(x)	BF64_DECODE(x, 50, 10)
+#define	SM_DEBUG_SYNCPASS_ENCODE(x)	BF64_ENCODE(x, 50, 10)
+
+#define	SM_DEBUG_TXG_DECODE(x)		BF64_DECODE(x, 0, 50)
+#define	SM_DEBUG_TXG_ENCODE(x)		BF64_ENCODE(x, 0, 50)
+
+#define	SM_RUN_MAX			SM_RUN_DECODE(~0ULL)
+
+#define	SM_ALLOC	0x0
+#define	SM_FREE		0x1
+
+/*
+ * The data for a given space map can be kept on blocks of any size.
+ * Larger blocks entail fewer i/o operations, but they also cause the
+ * DMU to keep more data in-core, and also to waste more i/o bandwidth
+ * when only a few blocks have changed since the last transaction group.
+ * This could use a lot more research, but for now, set the freelist
+ * block size to 4k (2^12).
+ */
+#define	SPACE_MAP_BLOCKSHIFT	12
+
+typedef void space_map_func_t(space_map_t *sm, uint64_t start, uint64_t size);
+
+extern void space_map_create(space_map_t *sm, uint64_t start, uint64_t size,
+    uint8_t shift, kmutex_t *lp);
+extern void space_map_destroy(space_map_t *sm);
+extern void space_map_add(space_map_t *sm, uint64_t start, uint64_t size);
+extern void space_map_remove(space_map_t *sm, uint64_t start, uint64_t size);
+extern boolean_t space_map_contains(space_map_t *sm,
+    uint64_t start, uint64_t size);
+extern void space_map_vacate(space_map_t *sm,
+    space_map_func_t *func, space_map_t *mdest);
+extern void space_map_walk(space_map_t *sm,
+    space_map_func_t *func, space_map_t *mdest);
+
+extern void space_map_load_wait(space_map_t *sm);
+extern int space_map_load(space_map_t *sm, space_map_ops_t *ops,
+    uint8_t maptype, space_map_obj_t *smo, objset_t *os);
+extern void space_map_unload(space_map_t *sm);
+
+extern uint64_t space_map_alloc(space_map_t *sm, uint64_t size);
+extern void space_map_claim(space_map_t *sm, uint64_t start, uint64_t size);
+extern void space_map_free(space_map_t *sm, uint64_t start, uint64_t size);
+extern uint64_t space_map_maxsize(space_map_t *sm);
+
+extern void space_map_sync(space_map_t *sm, uint8_t maptype,
+    space_map_obj_t *smo, objset_t *os, dmu_tx_t *tx);
+extern void space_map_truncate(space_map_obj_t *smo,
+    objset_t *os, dmu_tx_t *tx);
+
+extern void space_map_ref_create(avl_tree_t *t);
+extern void space_map_ref_destroy(avl_tree_t *t);
+extern void space_map_ref_add_seg(avl_tree_t *t,
+    uint64_t start, uint64_t end, int64_t refcnt);
+extern void space_map_ref_add_map(avl_tree_t *t,
+    space_map_t *sm, int64_t refcnt);
+extern void space_map_ref_generate_map(avl_tree_t *t,
+    space_map_t *sm, int64_t minref);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_SPACE_MAP_H */
diff --git a/uts/common/fs/zfs/sys/txg.h b/uts/common/fs/zfs/sys/txg.h
new file mode 100644
index 000000000000..e323d5efabb7
--- /dev/null
+++ b/uts/common/fs/zfs/sys/txg.h
@@ -0,0 +1,131 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_TXG_H
+#define	_SYS_TXG_H
+
+#include <sys/spa.h>
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#define	TXG_CONCURRENT_STATES	3	/* open, quiescing, syncing	*/
+#define	TXG_SIZE		4		/* next power of 2	*/
+#define	TXG_MASK		(TXG_SIZE - 1)	/* mask for size	*/
+#define	TXG_INITIAL		TXG_SIZE	/* initial txg 		*/
+#define	TXG_IDX			(txg & TXG_MASK)
+
+/* Number of txgs worth of frees we defer adding to in-core spacemaps */
+#define	TXG_DEFER_SIZE		2
+
+#define	TXG_WAIT		1ULL
+#define	TXG_NOWAIT		2ULL
+
+typedef struct tx_cpu tx_cpu_t;
+
+typedef struct txg_handle {
+	tx_cpu_t	*th_cpu;
+	uint64_t	th_txg;
+} txg_handle_t;
+
+typedef struct txg_node {
+	struct txg_node	*tn_next[TXG_SIZE];
+	uint8_t		tn_member[TXG_SIZE];
+} txg_node_t;
+
+typedef struct txg_list {
+	kmutex_t	tl_lock;
+	size_t		tl_offset;
+	txg_node_t	*tl_head[TXG_SIZE];
+} txg_list_t;
+
+struct dsl_pool;
+
+extern void txg_init(struct dsl_pool *dp, uint64_t txg);
+extern void txg_fini(struct dsl_pool *dp);
+extern void txg_sync_start(struct dsl_pool *dp);
+extern void txg_sync_stop(struct dsl_pool *dp);
+extern uint64_t txg_hold_open(struct dsl_pool *dp, txg_handle_t *txghp);
+extern void txg_rele_to_quiesce(txg_handle_t *txghp);
+extern void txg_rele_to_sync(txg_handle_t *txghp);
+extern void txg_register_callbacks(txg_handle_t *txghp, list_t *tx_callbacks);
+
+/*
+ * Delay the caller by the specified number of ticks or until
+ * the txg closes (whichever comes first).  This is intended
+ * to be used to throttle writers when the system nears its
+ * capacity.
+ */
+extern void txg_delay(struct dsl_pool *dp, uint64_t txg, int ticks);
+
+/*
+ * Wait until the given transaction group has finished syncing.
+ * Try to make this happen as soon as possible (eg. kick off any
+ * necessary syncs immediately).  If txg==0, wait for the currently open
+ * txg to finish syncing.
+ */
+extern void txg_wait_synced(struct dsl_pool *dp, uint64_t txg);
+
+/*
+ * Wait until the given transaction group, or one after it, is
+ * the open transaction group.  Try to make this happen as soon
+ * as possible (eg. kick off any necessary syncs immediately).
+ * If txg == 0, wait for the next open txg.
+ */
+extern void txg_wait_open(struct dsl_pool *dp, uint64_t txg);
+
+/*
+ * Returns TRUE if we are "backed up" waiting for the syncing
+ * transaction to complete; otherwise returns FALSE.
+ */
+extern boolean_t txg_stalled(struct dsl_pool *dp);
+
+/* returns TRUE if someone is waiting for the next txg to sync */
+extern boolean_t txg_sync_waiting(struct dsl_pool *dp);
+
+/*
+ * Per-txg object lists.
+ */
+
+#define	TXG_CLEAN(txg)	((txg) - 1)
+
+extern void txg_list_create(txg_list_t *tl, size_t offset);
+extern void txg_list_destroy(txg_list_t *tl);
+extern int txg_list_empty(txg_list_t *tl, uint64_t txg);
+extern int txg_list_add(txg_list_t *tl, void *p, uint64_t txg);
+extern int txg_list_add_tail(txg_list_t *tl, void *p, uint64_t txg);
+extern void *txg_list_remove(txg_list_t *tl, uint64_t txg);
+extern void *txg_list_remove_this(txg_list_t *tl, void *p, uint64_t txg);
+extern int txg_list_member(txg_list_t *tl, void *p, uint64_t txg);
+extern void *txg_list_head(txg_list_t *tl, uint64_t txg);
+extern void *txg_list_next(txg_list_t *tl, void *p, uint64_t txg);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_TXG_H */
diff --git a/uts/common/fs/zfs/sys/txg_impl.h b/uts/common/fs/zfs/sys/txg_impl.h
new file mode 100644
index 000000000000..7b356eac1293
--- /dev/null
+++ b/uts/common/fs/zfs/sys/txg_impl.h
@@ -0,0 +1,75 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_TXG_IMPL_H
+#define	_SYS_TXG_IMPL_H
+
+#include <sys/spa.h>
+#include <sys/txg.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct tx_cpu {
+	kmutex_t	tc_lock;
+	kcondvar_t	tc_cv[TXG_SIZE];
+	uint64_t	tc_count[TXG_SIZE];
+	list_t		tc_callbacks[TXG_SIZE]; /* commit cb list */
+	char		tc_pad[16];
+};
+
+typedef struct tx_state {
+	tx_cpu_t	*tx_cpu;	/* protects right to enter txg	*/
+	kmutex_t	tx_sync_lock;	/* protects tx_state_t */
+	uint64_t	tx_open_txg;	/* currently open txg id */
+	uint64_t	tx_quiesced_txg; /* quiesced txg waiting for sync */
+	uint64_t	tx_syncing_txg;	/* currently syncing txg id */
+	uint64_t	tx_synced_txg;	/* last synced txg id */
+
+	uint64_t	tx_sync_txg_waiting; /* txg we're waiting to sync */
+	uint64_t	tx_quiesce_txg_waiting; /* txg we're waiting to open */
+
+	kcondvar_t	tx_sync_more_cv;
+	kcondvar_t	tx_sync_done_cv;
+	kcondvar_t	tx_quiesce_more_cv;
+	kcondvar_t	tx_quiesce_done_cv;
+	kcondvar_t	tx_timeout_cv;
+	kcondvar_t	tx_exit_cv;	/* wait for all threads to exit */
+
+	uint8_t		tx_threads;	/* number of threads */
+	uint8_t		tx_exiting;	/* set when we're exiting */
+
+	kthread_t	*tx_sync_thread;
+	kthread_t	*tx_quiesce_thread;
+
+	taskq_t		*tx_commit_cb_taskq; /* commit callback taskq */
+} tx_state_t;
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_TXG_IMPL_H */
diff --git a/uts/common/fs/zfs/sys/uberblock.h b/uts/common/fs/zfs/sys/uberblock.h
new file mode 100644
index 000000000000..b5bb91573145
--- /dev/null
+++ b/uts/common/fs/zfs/sys/uberblock.h
@@ -0,0 +1,46 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_UBERBLOCK_H
+#define	_SYS_UBERBLOCK_H
+
+#include <sys/spa.h>
+#include <sys/vdev.h>
+#include <sys/zio.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct uberblock uberblock_t;
+
+extern int uberblock_verify(uberblock_t *ub);
+extern int uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_UBERBLOCK_H */
diff --git a/uts/common/fs/zfs/sys/uberblock_impl.h b/uts/common/fs/zfs/sys/uberblock_impl.h
new file mode 100644
index 000000000000..6ab6aa3135a2
--- /dev/null
+++ b/uts/common/fs/zfs/sys/uberblock_impl.h
@@ -0,0 +1,63 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_UBERBLOCK_IMPL_H
+#define	_SYS_UBERBLOCK_IMPL_H
+
+#include <sys/uberblock.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * The uberblock version is incremented whenever an incompatible on-disk
+ * format change is made to the SPA, DMU, or ZAP.
+ *
+ * Note: the first two fields should never be moved.  When a storage pool
+ * is opened, the uberblock must be read off the disk before the version
+ * can be checked.  If the ub_version field is moved, we may not detect
+ * version mismatch.  If the ub_magic field is moved, applications that
+ * expect the magic number in the first word won't work.
+ */
+#define	UBERBLOCK_MAGIC		0x00bab10c		/* oo-ba-bloc!	*/
+#define	UBERBLOCK_SHIFT		10			/* up to 1K	*/
+
+struct uberblock {
+	uint64_t	ub_magic;	/* UBERBLOCK_MAGIC		*/
+	uint64_t	ub_version;	/* SPA_VERSION			*/
+	uint64_t	ub_txg;		/* txg of last sync		*/
+	uint64_t	ub_guid_sum;	/* sum of all vdev guids	*/
+	uint64_t	ub_timestamp;	/* UTC time of last sync	*/
+	blkptr_t	ub_rootbp;	/* MOS objset_phys_t		*/
+
+	/* highest SPA_VERSION supported by software that wrote this txg */
+	uint64_t	ub_software_version;
+};
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_UBERBLOCK_IMPL_H */
diff --git a/uts/common/fs/zfs/sys/unique.h b/uts/common/fs/zfs/sys/unique.h
new file mode 100644
index 000000000000..2ef3093edf1c
--- /dev/null
+++ b/uts/common/fs/zfs/sys/unique.h
@@ -0,0 +1,59 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_UNIQUE_H
+#define	_SYS_UNIQUE_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/* The number of significant bits in each unique value. */
+#define	UNIQUE_BITS	56
+
+void unique_init(void);
+void unique_fini(void);
+
+/*
+ * Return a new unique value (which will not be uniquified against until
+ * it is unique_insert()-ed.
+ */
+uint64_t unique_create(void);
+
+/* Return a unique value, which equals the one passed in if possible. */
+uint64_t unique_insert(uint64_t value);
+
+/* Indicate that this value no longer needs to be uniquified against. */
+void unique_remove(uint64_t value);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_UNIQUE_H */
diff --git a/uts/common/fs/zfs/sys/vdev.h b/uts/common/fs/zfs/sys/vdev.h
new file mode 100644
index 000000000000..941f234dc68f
--- /dev/null
+++ b/uts/common/fs/zfs/sys/vdev.h
@@ -0,0 +1,161 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_VDEV_H
+#define	_SYS_VDEV_H
+
+#include <sys/spa.h>
+#include <sys/zio.h>
+#include <sys/dmu.h>
+#include <sys/space_map.h>
+#include <sys/fs/zfs.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef enum vdev_dtl_type {
+	DTL_MISSING,	/* 0% replication: no copies of the data */
+	DTL_PARTIAL,	/* less than 100% replication: some copies missing */
+	DTL_SCRUB,	/* unable to fully repair during scrub/resilver */
+	DTL_OUTAGE,	/* temporarily missing (used to attempt detach) */
+	DTL_TYPES
+} vdev_dtl_type_t;
+
+extern boolean_t zfs_nocacheflush;
+
+extern int vdev_open(vdev_t *);
+extern void vdev_open_children(vdev_t *);
+extern boolean_t vdev_uses_zvols(vdev_t *);
+extern int vdev_validate(vdev_t *);
+extern void vdev_close(vdev_t *);
+extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
+extern void vdev_reopen(vdev_t *);
+extern int vdev_validate_aux(vdev_t *vd);
+extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
+
+extern boolean_t vdev_is_bootable(vdev_t *vd);
+extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
+extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
+extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
+    uint64_t txg, uint64_t size);
+extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
+    uint64_t txg, uint64_t size);
+extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
+extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
+    int scrub_done);
+extern boolean_t vdev_dtl_required(vdev_t *vd);
+extern boolean_t vdev_resilver_needed(vdev_t *vd,
+    uint64_t *minp, uint64_t *maxp);
+
+extern void vdev_hold(vdev_t *);
+extern void vdev_rele(vdev_t *);
+
+extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
+extern void vdev_metaslab_fini(vdev_t *vd);
+extern void vdev_metaslab_set_size(vdev_t *);
+extern void vdev_expand(vdev_t *vd, uint64_t txg);
+extern void vdev_split(vdev_t *vd);
+
+
+extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
+extern void vdev_clear_stats(vdev_t *vd);
+extern void vdev_stat_update(zio_t *zio, uint64_t psize);
+extern void vdev_scan_stat_init(vdev_t *vd);
+extern void vdev_propagate_state(vdev_t *vd);
+extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
+    vdev_aux_t aux);
+
+extern void vdev_space_update(vdev_t *vd,
+    int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
+
+extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
+
+extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
+extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
+extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
+    vdev_state_t *);
+extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
+extern void vdev_clear(spa_t *spa, vdev_t *vd);
+
+extern boolean_t vdev_is_dead(vdev_t *vd);
+extern boolean_t vdev_readable(vdev_t *vd);
+extern boolean_t vdev_writeable(vdev_t *vd);
+extern boolean_t vdev_allocatable(vdev_t *vd);
+extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
+
+extern void vdev_cache_init(vdev_t *vd);
+extern void vdev_cache_fini(vdev_t *vd);
+extern int vdev_cache_read(zio_t *zio);
+extern void vdev_cache_write(zio_t *zio);
+extern void vdev_cache_purge(vdev_t *vd);
+
+extern void vdev_queue_init(vdev_t *vd);
+extern void vdev_queue_fini(vdev_t *vd);
+extern zio_t *vdev_queue_io(zio_t *zio);
+extern void vdev_queue_io_done(zio_t *zio);
+
+extern void vdev_config_dirty(vdev_t *vd);
+extern void vdev_config_clean(vdev_t *vd);
+extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg,
+    boolean_t);
+
+extern void vdev_state_dirty(vdev_t *vd);
+extern void vdev_state_clean(vdev_t *vd);
+
+typedef enum vdev_config_flag {
+	VDEV_CONFIG_SPARE = 1 << 0,
+	VDEV_CONFIG_L2CACHE = 1 << 1,
+	VDEV_CONFIG_REMOVING = 1 << 2
+} vdev_config_flag_t;
+
+extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
+extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
+    boolean_t getstats, vdev_config_flag_t flags);
+
+/*
+ * Label routines
+ */
+struct uberblock;
+extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
+extern int vdev_label_number(uint64_t psise, uint64_t offset);
+extern nvlist_t *vdev_label_read_config(vdev_t *vd);
+extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub);
+
+typedef enum {
+	VDEV_LABEL_CREATE,	/* create/add a new device */
+	VDEV_LABEL_REPLACE,	/* replace an existing device */
+	VDEV_LABEL_SPARE,	/* add a new hot spare */
+	VDEV_LABEL_REMOVE,	/* remove an existing device */
+	VDEV_LABEL_L2CACHE,	/* add an L2ARC cache device */
+	VDEV_LABEL_SPLIT	/* generating new label for split-off dev */
+} vdev_labeltype_t;
+
+extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_VDEV_H */
diff --git a/uts/common/fs/zfs/sys/vdev_disk.h b/uts/common/fs/zfs/sys/vdev_disk.h
new file mode 100644
index 000000000000..b748571ea0c3
--- /dev/null
+++ b/uts/common/fs/zfs/sys/vdev_disk.h
@@ -0,0 +1,56 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_VDEV_DISK_H
+#define	_SYS_VDEV_DISK_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/vdev.h>
+#ifdef _KERNEL
+#include <sys/buf.h>
+#include <sys/ddi.h>
+#include <sys/sunldi.h>
+#include <sys/sunddi.h>
+#endif
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct vdev_disk {
+	ddi_devid_t	vd_devid;
+	char		*vd_minor;
+	ldi_handle_t	vd_lh;
+} vdev_disk_t;
+
+#ifdef _KERNEL
+extern int vdev_disk_physio(ldi_handle_t, caddr_t, size_t, uint64_t, int);
+#endif
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_VDEV_DISK_H */
diff --git a/uts/common/fs/zfs/sys/vdev_file.h b/uts/common/fs/zfs/sys/vdev_file.h
new file mode 100644
index 000000000000..cd496735778c
--- /dev/null
+++ b/uts/common/fs/zfs/sys/vdev_file.h
@@ -0,0 +1,46 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_VDEV_FILE_H
+#define	_SYS_VDEV_FILE_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/vdev.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct vdev_file {
+	vnode_t		*vf_vnode;
+} vdev_file_t;
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_VDEV_FILE_H */
diff --git a/uts/common/fs/zfs/sys/vdev_impl.h b/uts/common/fs/zfs/sys/vdev_impl.h
new file mode 100644
index 000000000000..161bd21f05a6
--- /dev/null
+++ b/uts/common/fs/zfs/sys/vdev_impl.h
@@ -0,0 +1,322 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_VDEV_IMPL_H
+#define	_SYS_VDEV_IMPL_H
+
+#include <sys/avl.h>
+#include <sys/dmu.h>
+#include <sys/metaslab.h>
+#include <sys/nvpair.h>
+#include <sys/space_map.h>
+#include <sys/vdev.h>
+#include <sys/dkio.h>
+#include <sys/uberblock_impl.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Virtual device descriptors.
+ *
+ * All storage pool operations go through the virtual device framework,
+ * which provides data replication and I/O scheduling.
+ */
+
+/*
+ * Forward declarations that lots of things need.
+ */
+typedef struct vdev_queue vdev_queue_t;
+typedef struct vdev_cache vdev_cache_t;
+typedef struct vdev_cache_entry vdev_cache_entry_t;
+
+/*
+ * Virtual device operations
+ */
+typedef int	vdev_open_func_t(vdev_t *vd, uint64_t *size, uint64_t *ashift);
+typedef void	vdev_close_func_t(vdev_t *vd);
+typedef uint64_t vdev_asize_func_t(vdev_t *vd, uint64_t psize);
+typedef int	vdev_io_start_func_t(zio_t *zio);
+typedef void	vdev_io_done_func_t(zio_t *zio);
+typedef void	vdev_state_change_func_t(vdev_t *vd, int, int);
+typedef void	vdev_hold_func_t(vdev_t *vd);
+typedef void	vdev_rele_func_t(vdev_t *vd);
+
+typedef struct vdev_ops {
+	vdev_open_func_t		*vdev_op_open;
+	vdev_close_func_t		*vdev_op_close;
+	vdev_asize_func_t		*vdev_op_asize;
+	vdev_io_start_func_t		*vdev_op_io_start;
+	vdev_io_done_func_t		*vdev_op_io_done;
+	vdev_state_change_func_t	*vdev_op_state_change;
+	vdev_hold_func_t		*vdev_op_hold;
+	vdev_rele_func_t		*vdev_op_rele;
+	char				vdev_op_type[16];
+	boolean_t			vdev_op_leaf;
+} vdev_ops_t;
+
+/*
+ * Virtual device properties
+ */
+struct vdev_cache_entry {
+	char		*ve_data;
+	uint64_t	ve_offset;
+	uint64_t	ve_lastused;
+	avl_node_t	ve_offset_node;
+	avl_node_t	ve_lastused_node;
+	uint32_t	ve_hits;
+	uint16_t	ve_missed_update;
+	zio_t		*ve_fill_io;
+};
+
+struct vdev_cache {
+	avl_tree_t	vc_offset_tree;
+	avl_tree_t	vc_lastused_tree;
+	kmutex_t	vc_lock;
+};
+
+struct vdev_queue {
+	avl_tree_t	vq_deadline_tree;
+	avl_tree_t	vq_read_tree;
+	avl_tree_t	vq_write_tree;
+	avl_tree_t	vq_pending_tree;
+	kmutex_t	vq_lock;
+};
+
+/*
+ * Virtual device descriptor
+ */
+struct vdev {
+	/*
+	 * Common to all vdev types.
+	 */
+	uint64_t	vdev_id;	/* child number in vdev parent	*/
+	uint64_t	vdev_guid;	/* unique ID for this vdev	*/
+	uint64_t	vdev_guid_sum;	/* self guid + all child guids	*/
+	uint64_t	vdev_orig_guid;	/* orig. guid prior to remove	*/
+	uint64_t	vdev_asize;	/* allocatable device capacity	*/
+	uint64_t	vdev_min_asize;	/* min acceptable asize		*/
+	uint64_t	vdev_ashift;	/* block alignment shift	*/
+	uint64_t	vdev_state;	/* see VDEV_STATE_* #defines	*/
+	uint64_t	vdev_prevstate;	/* used when reopening a vdev	*/
+	vdev_ops_t	*vdev_ops;	/* vdev operations		*/
+	spa_t		*vdev_spa;	/* spa for this vdev		*/
+	void		*vdev_tsd;	/* type-specific data		*/
+	vnode_t		*vdev_name_vp;	/* vnode for pathname		*/
+	vnode_t		*vdev_devid_vp;	/* vnode for devid		*/
+	vdev_t		*vdev_top;	/* top-level vdev		*/
+	vdev_t		*vdev_parent;	/* parent vdev			*/
+	vdev_t		**vdev_child;	/* array of children		*/
+	uint64_t	vdev_children;	/* number of children		*/
+	space_map_t	vdev_dtl[DTL_TYPES]; /* in-core dirty time logs	*/
+	vdev_stat_t	vdev_stat;	/* virtual device statistics	*/
+	boolean_t	vdev_expanding;	/* expand the vdev?		*/
+	boolean_t	vdev_reopening;	/* reopen in progress?		*/
+	int		vdev_open_error; /* error on last open		*/
+	kthread_t	*vdev_open_thread; /* thread opening children	*/
+	uint64_t	vdev_crtxg;	/* txg when top-level was added */
+
+	/*
+	 * Top-level vdev state.
+	 */
+	uint64_t	vdev_ms_array;	/* metaslab array object	*/
+	uint64_t	vdev_ms_shift;	/* metaslab size shift		*/
+	uint64_t	vdev_ms_count;	/* number of metaslabs		*/
+	metaslab_group_t *vdev_mg;	/* metaslab group		*/
+	metaslab_t	**vdev_ms;	/* metaslab array		*/
+	txg_list_t	vdev_ms_list;	/* per-txg dirty metaslab lists	*/
+	txg_list_t	vdev_dtl_list;	/* per-txg dirty DTL lists	*/
+	txg_node_t	vdev_txg_node;	/* per-txg dirty vdev linkage	*/
+	boolean_t	vdev_remove_wanted; /* async remove wanted?	*/
+	boolean_t	vdev_probe_wanted; /* async probe wanted?	*/
+	uint64_t	vdev_removing;	/* device is being removed?	*/
+	list_node_t	vdev_config_dirty_node; /* config dirty list	*/
+	list_node_t	vdev_state_dirty_node; /* state dirty list	*/
+	uint64_t	vdev_deflate_ratio; /* deflation ratio (x512)	*/
+	uint64_t	vdev_islog;	/* is an intent log device	*/
+	uint64_t	vdev_ishole;	/* is a hole in the namespace 	*/
+
+	/*
+	 * Leaf vdev state.
+	 */
+	uint64_t	vdev_psize;	/* physical device capacity	*/
+	space_map_obj_t	vdev_dtl_smo;	/* dirty time log space map obj	*/
+	txg_node_t	vdev_dtl_node;	/* per-txg dirty DTL linkage	*/
+	uint64_t	vdev_wholedisk;	/* true if this is a whole disk */
+	uint64_t	vdev_offline;	/* persistent offline state	*/
+	uint64_t	vdev_faulted;	/* persistent faulted state	*/
+	uint64_t	vdev_degraded;	/* persistent degraded state	*/
+	uint64_t	vdev_removed;	/* persistent removed state	*/
+	uint64_t	vdev_resilvering; /* persistent resilvering state */
+	uint64_t	vdev_nparity;	/* number of parity devices for raidz */
+	char		*vdev_path;	/* vdev path (if any)		*/
+	char		*vdev_devid;	/* vdev devid (if any)		*/
+	char		*vdev_physpath;	/* vdev device path (if any)	*/
+	char		*vdev_fru;	/* physical FRU location	*/
+	uint64_t	vdev_not_present; /* not present during import	*/
+	uint64_t	vdev_unspare;	/* unspare when resilvering done */
+	hrtime_t	vdev_last_try;	/* last reopen time		*/
+	boolean_t	vdev_nowritecache; /* true if flushwritecache failed */
+	boolean_t	vdev_checkremove; /* temporary online test	*/
+	boolean_t	vdev_forcefault; /* force online fault		*/
+	boolean_t	vdev_splitting;	/* split or repair in progress  */
+	boolean_t	vdev_delayed_close; /* delayed device close?	*/
+	uint8_t		vdev_tmpoffline; /* device taken offline temporarily? */
+	uint8_t		vdev_detached;	/* device detached?		*/
+	uint8_t		vdev_cant_read;	/* vdev is failing all reads	*/
+	uint8_t		vdev_cant_write; /* vdev is failing all writes	*/
+	uint64_t	vdev_isspare;	/* was a hot spare		*/
+	uint64_t	vdev_isl2cache;	/* was a l2cache device		*/
+	vdev_queue_t	vdev_queue;	/* I/O deadline schedule queue	*/
+	vdev_cache_t	vdev_cache;	/* physical block cache		*/
+	spa_aux_vdev_t	*vdev_aux;	/* for l2cache vdevs		*/
+	zio_t		*vdev_probe_zio; /* root of current probe	*/
+	vdev_aux_t	vdev_label_aux;	/* on-disk aux state		*/
+
+	/*
+	 * For DTrace to work in userland (libzpool) context, these fields must
+	 * remain at the end of the structure.  DTrace will use the kernel's
+	 * CTF definition for 'struct vdev', and since the size of a kmutex_t is
+	 * larger in userland, the offsets for the rest fields would be
+	 * incorrect.
+	 */
+	kmutex_t	vdev_dtl_lock;	/* vdev_dtl_{map,resilver}	*/
+	kmutex_t	vdev_stat_lock;	/* vdev_stat			*/
+	kmutex_t	vdev_probe_lock; /* protects vdev_probe_zio	*/
+};
+
+#define	VDEV_RAIDZ_MAXPARITY	3
+
+#define	VDEV_PAD_SIZE		(8 << 10)
+/* 2 padding areas (vl_pad1 and vl_pad2) to skip */
+#define	VDEV_SKIP_SIZE		VDEV_PAD_SIZE * 2
+#define	VDEV_PHYS_SIZE		(112 << 10)
+#define	VDEV_UBERBLOCK_RING	(128 << 10)
+
+#define	VDEV_UBERBLOCK_SHIFT(vd)	\
+	MAX((vd)->vdev_top->vdev_ashift, UBERBLOCK_SHIFT)
+#define	VDEV_UBERBLOCK_COUNT(vd)	\
+	(VDEV_UBERBLOCK_RING >> VDEV_UBERBLOCK_SHIFT(vd))
+#define	VDEV_UBERBLOCK_OFFSET(vd, n)	\
+	offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT(vd)])
+#define	VDEV_UBERBLOCK_SIZE(vd)		(1ULL << VDEV_UBERBLOCK_SHIFT(vd))
+
+typedef struct vdev_phys {
+	char		vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_eck_t)];
+	zio_eck_t	vp_zbt;
+} vdev_phys_t;
+
+typedef struct vdev_label {
+	char		vl_pad1[VDEV_PAD_SIZE];			/*  8K */
+	char		vl_pad2[VDEV_PAD_SIZE];			/*  8K */
+	vdev_phys_t	vl_vdev_phys;				/* 112K	*/
+	char		vl_uberblock[VDEV_UBERBLOCK_RING];	/* 128K	*/
+} vdev_label_t;							/* 256K total */
+
+/*
+ * vdev_dirty() flags
+ */
+#define	VDD_METASLAB	0x01
+#define	VDD_DTL		0x02
+
+/*
+ * Size and offset of embedded boot loader region on each label.
+ * The total size of the first two labels plus the boot area is 4MB.
+ */
+#define	VDEV_BOOT_OFFSET	(2 * sizeof (vdev_label_t))
+#define	VDEV_BOOT_SIZE		(7ULL << 19)			/* 3.5M	*/
+
+/*
+ * Size of label regions at the start and end of each leaf device.
+ */
+#define	VDEV_LABEL_START_SIZE	(2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE)
+#define	VDEV_LABEL_END_SIZE	(2 * sizeof (vdev_label_t))
+#define	VDEV_LABELS		4
+
+#define	VDEV_ALLOC_LOAD		0
+#define	VDEV_ALLOC_ADD		1
+#define	VDEV_ALLOC_SPARE	2
+#define	VDEV_ALLOC_L2CACHE	3
+#define	VDEV_ALLOC_ROOTPOOL	4
+#define	VDEV_ALLOC_SPLIT	5
+
+/*
+ * Allocate or free a vdev
+ */
+extern vdev_t *vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid,
+    vdev_ops_t *ops);
+extern int vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *config,
+    vdev_t *parent, uint_t id, int alloctype);
+extern void vdev_free(vdev_t *vd);
+
+/*
+ * Add or remove children and parents
+ */
+extern void vdev_add_child(vdev_t *pvd, vdev_t *cvd);
+extern void vdev_remove_child(vdev_t *pvd, vdev_t *cvd);
+extern void vdev_compact_children(vdev_t *pvd);
+extern vdev_t *vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops);
+extern void vdev_remove_parent(vdev_t *cvd);
+
+/*
+ * vdev sync load and sync
+ */
+extern void vdev_load_log_state(vdev_t *nvd, vdev_t *ovd);
+extern boolean_t vdev_log_state_valid(vdev_t *vd);
+extern void vdev_load(vdev_t *vd);
+extern void vdev_sync(vdev_t *vd, uint64_t txg);
+extern void vdev_sync_done(vdev_t *vd, uint64_t txg);
+extern void vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg);
+
+/*
+ * Available vdev types.
+ */
+extern vdev_ops_t vdev_root_ops;
+extern vdev_ops_t vdev_mirror_ops;
+extern vdev_ops_t vdev_replacing_ops;
+extern vdev_ops_t vdev_raidz_ops;
+extern vdev_ops_t vdev_disk_ops;
+extern vdev_ops_t vdev_file_ops;
+extern vdev_ops_t vdev_missing_ops;
+extern vdev_ops_t vdev_hole_ops;
+extern vdev_ops_t vdev_spare_ops;
+
+/*
+ * Common size functions
+ */
+extern uint64_t vdev_default_asize(vdev_t *vd, uint64_t psize);
+extern uint64_t vdev_get_min_asize(vdev_t *vd);
+extern void vdev_set_min_asize(vdev_t *vd);
+
+/*
+ * zdb uses this tunable, so it must be declared here to make lint happy.
+ */
+extern int zfs_vdev_cache_size;
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_VDEV_IMPL_H */
diff --git a/uts/common/fs/zfs/sys/zap.h b/uts/common/fs/zfs/sys/zap.h
new file mode 100644
index 000000000000..a1130bbbaaae
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zap.h
@@ -0,0 +1,482 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_ZAP_H
+#define	_SYS_ZAP_H
+
+/*
+ * ZAP - ZFS Attribute Processor
+ *
+ * The ZAP is a module which sits on top of the DMU (Data Management
+ * Unit) and implements a higher-level storage primitive using DMU
+ * objects.  Its primary consumer is the ZPL (ZFS Posix Layer).
+ *
+ * A "zapobj" is a DMU object which the ZAP uses to stores attributes.
+ * Users should use only zap routines to access a zapobj - they should
+ * not access the DMU object directly using DMU routines.
+ *
+ * The attributes stored in a zapobj are name-value pairs.  The name is
+ * a zero-terminated string of up to ZAP_MAXNAMELEN bytes (including
+ * terminating NULL).  The value is an array of integers, which may be
+ * 1, 2, 4, or 8 bytes long.  The total space used by the array (number
+ * of integers * integer length) can be up to ZAP_MAXVALUELEN bytes.
+ * Note that an 8-byte integer value can be used to store the location
+ * (object number) of another dmu object (which may be itself a zapobj).
+ * Note that you can use a zero-length attribute to store a single bit
+ * of information - the attribute is present or not.
+ *
+ * The ZAP routines are thread-safe.  However, you must observe the
+ * DMU's restriction that a transaction may not be operated on
+ * concurrently.
+ *
+ * Any of the routines that return an int may return an I/O error (EIO
+ * or ECHECKSUM).
+ *
+ *
+ * Implementation / Performance Notes:
+ *
+ * The ZAP is intended to operate most efficiently on attributes with
+ * short (49 bytes or less) names and single 8-byte values, for which
+ * the microzap will be used.  The ZAP should be efficient enough so
+ * that the user does not need to cache these attributes.
+ *
+ * The ZAP's locking scheme makes its routines thread-safe.  Operations
+ * on different zapobjs will be processed concurrently.  Operations on
+ * the same zapobj which only read data will be processed concurrently.
+ * Operations on the same zapobj which modify data will be processed
+ * concurrently when there are many attributes in the zapobj (because
+ * the ZAP uses per-block locking - more than 128 * (number of cpus)
+ * small attributes will suffice).
+ */
+
+/*
+ * We're using zero-terminated byte strings (ie. ASCII or UTF-8 C
+ * strings) for the names of attributes, rather than a byte string
+ * bounded by an explicit length.  If some day we want to support names
+ * in character sets which have embedded zeros (eg. UTF-16, UTF-32),
+ * we'll have to add routines for using length-bounded strings.
+ */
+
+#include <sys/dmu.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * The matchtype specifies which entry will be accessed.
+ * MT_EXACT: only find an exact match (non-normalized)
+ * MT_FIRST: find the "first" normalized (case and Unicode
+ *     form) match; the designated "first" match will not change as long
+ *     as the set of entries with this normalization doesn't change
+ * MT_BEST: if there is an exact match, find that, otherwise find the
+ *     first normalized match
+ */
+typedef enum matchtype
+{
+	MT_EXACT,
+	MT_BEST,
+	MT_FIRST
+} matchtype_t;
+
+typedef enum zap_flags {
+	/* Use 64-bit hash value (serialized cursors will always use 64-bits) */
+	ZAP_FLAG_HASH64 = 1 << 0,
+	/* Key is binary, not string (zap_add_uint64() can be used) */
+	ZAP_FLAG_UINT64_KEY = 1 << 1,
+	/*
+	 * First word of key (which must be an array of uint64) is
+	 * already randomly distributed.
+	 */
+	ZAP_FLAG_PRE_HASHED_KEY = 1 << 2,
+} zap_flags_t;
+
+/*
+ * Create a new zapobj with no attributes and return its object number.
+ * MT_EXACT will cause the zap object to only support MT_EXACT lookups,
+ * otherwise any matchtype can be used for lookups.
+ *
+ * normflags specifies what normalization will be done.  values are:
+ * 0: no normalization (legacy on-disk format, supports MT_EXACT matching
+ *     only)
+ * U8_TEXTPREP_TOLOWER: case normalization will be performed.
+ *     MT_FIRST/MT_BEST matching will find entries that match without
+ *     regard to case (eg. looking for "foo" can find an entry "Foo").
+ * Eventually, other flags will permit unicode normalization as well.
+ */
+uint64_t zap_create(objset_t *ds, dmu_object_type_t ot,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx);
+uint64_t zap_create_norm(objset_t *ds, int normflags, dmu_object_type_t ot,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx);
+uint64_t zap_create_flags(objset_t *os, int normflags, zap_flags_t flags,
+    dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx);
+
+/*
+ * Create a new zapobj with no attributes from the given (unallocated)
+ * object number.
+ */
+int zap_create_claim(objset_t *ds, uint64_t obj, dmu_object_type_t ot,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx);
+int zap_create_claim_norm(objset_t *ds, uint64_t obj,
+    int normflags, dmu_object_type_t ot,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx);
+
+/*
+ * The zapobj passed in must be a valid ZAP object for all of the
+ * following routines.
+ */
+
+/*
+ * Destroy this zapobj and all its attributes.
+ *
+ * Frees the object number using dmu_object_free.
+ */
+int zap_destroy(objset_t *ds, uint64_t zapobj, dmu_tx_t *tx);
+
+/*
+ * Manipulate attributes.
+ *
+ * 'integer_size' is in bytes, and must be 1, 2, 4, or 8.
+ */
+
+/*
+ * Retrieve the contents of the attribute with the given name.
+ *
+ * If the requested attribute does not exist, the call will fail and
+ * return ENOENT.
+ *
+ * If 'integer_size' is smaller than the attribute's integer size, the
+ * call will fail and return EINVAL.
+ *
+ * If 'integer_size' is equal to or larger than the attribute's integer
+ * size, the call will succeed and return 0.  * When converting to a
+ * larger integer size, the integers will be treated as unsigned (ie. no
+ * sign-extension will be performed).
+ *
+ * 'num_integers' is the length (in integers) of 'buf'.
+ *
+ * If the attribute is longer than the buffer, as many integers as will
+ * fit will be transferred to 'buf'.  If the entire attribute was not
+ * transferred, the call will return EOVERFLOW.
+ *
+ * If rn_len is nonzero, realname will be set to the name of the found
+ * entry (which may be different from the requested name if matchtype is
+ * not MT_EXACT).
+ *
+ * If normalization_conflictp is not NULL, it will be set if there is
+ * another name with the same case/unicode normalized form.
+ */
+int zap_lookup(objset_t *ds, uint64_t zapobj, const char *name,
+    uint64_t integer_size, uint64_t num_integers, void *buf);
+int zap_lookup_norm(objset_t *ds, uint64_t zapobj, const char *name,
+    uint64_t integer_size, uint64_t num_integers, void *buf,
+    matchtype_t mt, char *realname, int rn_len,
+    boolean_t *normalization_conflictp);
+int zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
+    int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf);
+int zap_contains(objset_t *ds, uint64_t zapobj, const char *name);
+int zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
+    int key_numints);
+
+int zap_count_write(objset_t *os, uint64_t zapobj, const char *name,
+    int add, uint64_t *towrite, uint64_t *tooverwrite);
+
+/*
+ * Create an attribute with the given name and value.
+ *
+ * If an attribute with the given name already exists, the call will
+ * fail and return EEXIST.
+ */
+int zap_add(objset_t *ds, uint64_t zapobj, const char *key,
+    int integer_size, uint64_t num_integers,
+    const void *val, dmu_tx_t *tx);
+int zap_add_uint64(objset_t *ds, uint64_t zapobj, const uint64_t *key,
+    int key_numints, int integer_size, uint64_t num_integers,
+    const void *val, dmu_tx_t *tx);
+
+/*
+ * Set the attribute with the given name to the given value.  If an
+ * attribute with the given name does not exist, it will be created.  If
+ * an attribute with the given name already exists, the previous value
+ * will be overwritten.  The integer_size may be different from the
+ * existing attribute's integer size, in which case the attribute's
+ * integer size will be updated to the new value.
+ */
+int zap_update(objset_t *ds, uint64_t zapobj, const char *name,
+    int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx);
+int zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
+    int key_numints,
+    int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx);
+
+/*
+ * Get the length (in integers) and the integer size of the specified
+ * attribute.
+ *
+ * If the requested attribute does not exist, the call will fail and
+ * return ENOENT.
+ */
+int zap_length(objset_t *ds, uint64_t zapobj, const char *name,
+    uint64_t *integer_size, uint64_t *num_integers);
+int zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
+    int key_numints, uint64_t *integer_size, uint64_t *num_integers);
+
+/*
+ * Remove the specified attribute.
+ *
+ * If the specified attribute does not exist, the call will fail and
+ * return ENOENT.
+ */
+int zap_remove(objset_t *ds, uint64_t zapobj, const char *name, dmu_tx_t *tx);
+int zap_remove_norm(objset_t *ds, uint64_t zapobj, const char *name,
+    matchtype_t mt, dmu_tx_t *tx);
+int zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
+    int key_numints, dmu_tx_t *tx);
+
+/*
+ * Returns (in *count) the number of attributes in the specified zap
+ * object.
+ */
+int zap_count(objset_t *ds, uint64_t zapobj, uint64_t *count);
+
+/*
+ * Returns (in name) the name of the entry whose (value & mask)
+ * (za_first_integer) is value, or ENOENT if not found.  The string
+ * pointed to by name must be at least 256 bytes long.  If mask==0, the
+ * match must be exact (ie, same as mask=-1ULL).
+ */
+int zap_value_search(objset_t *os, uint64_t zapobj,
+    uint64_t value, uint64_t mask, char *name);
+
+/*
+ * Transfer all the entries from fromobj into intoobj.  Only works on
+ * int_size=8 num_integers=1 values.  Fails if there are any duplicated
+ * entries.
+ */
+int zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx);
+
+/* Same as zap_join, but set the values to 'value'. */
+int zap_join_key(objset_t *os, uint64_t fromobj, uint64_t intoobj,
+    uint64_t value, dmu_tx_t *tx);
+
+/* Same as zap_join, but add together any duplicated entries. */
+int zap_join_increment(objset_t *os, uint64_t fromobj, uint64_t intoobj,
+    dmu_tx_t *tx);
+
+/*
+ * Manipulate entries where the name + value are the "same" (the name is
+ * a stringified version of the value).
+ */
+int zap_add_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx);
+int zap_remove_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx);
+int zap_lookup_int(objset_t *os, uint64_t obj, uint64_t value);
+int zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta,
+    dmu_tx_t *tx);
+
+/* Here the key is an int and the value is a different int. */
+int zap_add_int_key(objset_t *os, uint64_t obj,
+    uint64_t key, uint64_t value, dmu_tx_t *tx);
+int zap_lookup_int_key(objset_t *os, uint64_t obj,
+    uint64_t key, uint64_t *valuep);
+
+/*
+ * They name is a stringified version of key; increment its value by
+ * delta.  Zero values will be zap_remove()-ed.
+ */
+int zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta,
+    dmu_tx_t *tx);
+int zap_increment(objset_t *os, uint64_t obj, const char *name, int64_t delta,
+    dmu_tx_t *tx);
+
+struct zap;
+struct zap_leaf;
+typedef struct zap_cursor {
+	/* This structure is opaque! */
+	objset_t *zc_objset;
+	struct zap *zc_zap;
+	struct zap_leaf *zc_leaf;
+	uint64_t zc_zapobj;
+	uint64_t zc_serialized;
+	uint64_t zc_hash;
+	uint32_t zc_cd;
+} zap_cursor_t;
+
+typedef struct {
+	int za_integer_length;
+	/*
+	 * za_normalization_conflict will be set if there are additional
+	 * entries with this normalized form (eg, "foo" and "Foo").
+	 */
+	boolean_t za_normalization_conflict;
+	uint64_t za_num_integers;
+	uint64_t za_first_integer;	/* no sign extension for <8byte ints */
+	char za_name[MAXNAMELEN];
+} zap_attribute_t;
+
+/*
+ * The interface for listing all the attributes of a zapobj can be
+ * thought of as cursor moving down a list of the attributes one by
+ * one.  The cookie returned by the zap_cursor_serialize routine is
+ * persistent across system calls (and across reboot, even).
+ */
+
+/*
+ * Initialize a zap cursor, pointing to the "first" attribute of the
+ * zapobj.  You must _fini the cursor when you are done with it.
+ */
+void zap_cursor_init(zap_cursor_t *zc, objset_t *ds, uint64_t zapobj);
+void zap_cursor_fini(zap_cursor_t *zc);
+
+/*
+ * Get the attribute currently pointed to by the cursor.  Returns
+ * ENOENT if at the end of the attributes.
+ */
+int zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za);
+
+/*
+ * Advance the cursor to the next attribute.
+ */
+void zap_cursor_advance(zap_cursor_t *zc);
+
+/*
+ * Get a persistent cookie pointing to the current position of the zap
+ * cursor.  The low 4 bits in the cookie are always zero, and thus can
+ * be used as to differentiate a serialized cookie from a different type
+ * of value.  The cookie will be less than 2^32 as long as there are
+ * fewer than 2^22 (4.2 million) entries in the zap object.
+ */
+uint64_t zap_cursor_serialize(zap_cursor_t *zc);
+
+/*
+ * Advance the cursor to the attribute having the given key.
+ */
+int zap_cursor_move_to_key(zap_cursor_t *zc, const char *name, matchtype_t mt);
+
+/*
+ * Initialize a zap cursor pointing to the position recorded by
+ * zap_cursor_serialize (in the "serialized" argument).  You can also
+ * use a "serialized" argument of 0 to start at the beginning of the
+ * zapobj (ie.  zap_cursor_init_serialized(..., 0) is equivalent to
+ * zap_cursor_init(...).)
+ */
+void zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *ds,
+    uint64_t zapobj, uint64_t serialized);
+
+
+#define	ZAP_HISTOGRAM_SIZE 10
+
+typedef struct zap_stats {
+	/*
+	 * Size of the pointer table (in number of entries).
+	 * This is always a power of 2, or zero if it's a microzap.
+	 * In general, it should be considerably greater than zs_num_leafs.
+	 */
+	uint64_t zs_ptrtbl_len;
+
+	uint64_t zs_blocksize;		/* size of zap blocks */
+
+	/*
+	 * The number of blocks used.  Note that some blocks may be
+	 * wasted because old ptrtbl's and large name/value blocks are
+	 * not reused.  (Although their space is reclaimed, we don't
+	 * reuse those offsets in the object.)
+	 */
+	uint64_t zs_num_blocks;
+
+	/*
+	 * Pointer table values from zap_ptrtbl in the zap_phys_t
+	 */
+	uint64_t zs_ptrtbl_nextblk;	  /* next (larger) copy start block */
+	uint64_t zs_ptrtbl_blks_copied;   /* number source blocks copied */
+	uint64_t zs_ptrtbl_zt_blk;	  /* starting block number */
+	uint64_t zs_ptrtbl_zt_numblks;    /* number of blocks */
+	uint64_t zs_ptrtbl_zt_shift;	  /* bits to index it */
+
+	/*
+	 * Values of the other members of the zap_phys_t
+	 */
+	uint64_t zs_block_type;		/* ZBT_HEADER */
+	uint64_t zs_magic;		/* ZAP_MAGIC */
+	uint64_t zs_num_leafs;		/* The number of leaf blocks */
+	uint64_t zs_num_entries;	/* The number of zap entries */
+	uint64_t zs_salt;		/* salt to stir into hash function */
+
+	/*
+	 * Histograms.  For all histograms, the last index
+	 * (ZAP_HISTOGRAM_SIZE-1) includes any values which are greater
+	 * than what can be represented.  For example
+	 * zs_leafs_with_n5_entries[ZAP_HISTOGRAM_SIZE-1] is the number
+	 * of leafs with more than 45 entries.
+	 */
+
+	/*
+	 * zs_leafs_with_n_pointers[n] is the number of leafs with
+	 * 2^n pointers to it.
+	 */
+	uint64_t zs_leafs_with_2n_pointers[ZAP_HISTOGRAM_SIZE];
+
+	/*
+	 * zs_leafs_with_n_entries[n] is the number of leafs with
+	 * [n*5, (n+1)*5) entries.  In the current implementation, there
+	 * can be at most 55 entries in any block, but there may be
+	 * fewer if the name or value is large, or the block is not
+	 * completely full.
+	 */
+	uint64_t zs_blocks_with_n5_entries[ZAP_HISTOGRAM_SIZE];
+
+	/*
+	 * zs_leafs_n_tenths_full[n] is the number of leafs whose
+	 * fullness is in the range [n/10, (n+1)/10).
+	 */
+	uint64_t zs_blocks_n_tenths_full[ZAP_HISTOGRAM_SIZE];
+
+	/*
+	 * zs_entries_using_n_chunks[n] is the number of entries which
+	 * consume n 24-byte chunks.  (Note, large names/values only use
+	 * one chunk, but contribute to zs_num_blocks_large.)
+	 */
+	uint64_t zs_entries_using_n_chunks[ZAP_HISTOGRAM_SIZE];
+
+	/*
+	 * zs_buckets_with_n_entries[n] is the number of buckets (each
+	 * leaf has 64 buckets) with n entries.
+	 * zs_buckets_with_n_entries[1] should be very close to
+	 * zs_num_entries.
+	 */
+	uint64_t zs_buckets_with_n_entries[ZAP_HISTOGRAM_SIZE];
+} zap_stats_t;
+
+/*
+ * Get statistics about a ZAP object.  Note: you need to be aware of the
+ * internal implementation of the ZAP to correctly interpret some of the
+ * statistics.  This interface shouldn't be relied on unless you really
+ * know what you're doing.
+ */
+int zap_get_stats(objset_t *ds, uint64_t zapobj, zap_stats_t *zs);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ZAP_H */
diff --git a/uts/common/fs/zfs/sys/zap_impl.h b/uts/common/fs/zfs/sys/zap_impl.h
new file mode 100644
index 000000000000..1dc322e02f6f
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zap_impl.h
@@ -0,0 +1,228 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_ZAP_IMPL_H
+#define	_SYS_ZAP_IMPL_H
+
+#include <sys/zap.h>
+#include <sys/zfs_context.h>
+#include <sys/avl.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+extern int fzap_default_block_shift;
+
+#define	ZAP_MAGIC 0x2F52AB2ABULL
+
+#define	FZAP_BLOCK_SHIFT(zap)	((zap)->zap_f.zap_block_shift)
+
+#define	MZAP_ENT_LEN		64
+#define	MZAP_NAME_LEN		(MZAP_ENT_LEN - 8 - 4 - 2)
+#define	MZAP_MAX_BLKSHIFT	SPA_MAXBLOCKSHIFT
+#define	MZAP_MAX_BLKSZ		(1 << MZAP_MAX_BLKSHIFT)
+
+#define	ZAP_NEED_CD		(-1U)
+
+typedef struct mzap_ent_phys {
+	uint64_t mze_value;
+	uint32_t mze_cd;
+	uint16_t mze_pad;	/* in case we want to chain them someday */
+	char mze_name[MZAP_NAME_LEN];
+} mzap_ent_phys_t;
+
+typedef struct mzap_phys {
+	uint64_t mz_block_type;	/* ZBT_MICRO */
+	uint64_t mz_salt;
+	uint64_t mz_normflags;
+	uint64_t mz_pad[5];
+	mzap_ent_phys_t mz_chunk[1];
+	/* actually variable size depending on block size */
+} mzap_phys_t;
+
+typedef struct mzap_ent {
+	avl_node_t mze_node;
+	int mze_chunkid;
+	uint64_t mze_hash;
+	uint32_t mze_cd; /* copy from mze_phys->mze_cd */
+} mzap_ent_t;
+
+#define	MZE_PHYS(zap, mze) \
+	(&(zap)->zap_m.zap_phys->mz_chunk[(mze)->mze_chunkid])
+
+/*
+ * The (fat) zap is stored in one object. It is an array of
+ * 1<<FZAP_BLOCK_SHIFT byte blocks. The layout looks like one of:
+ *
+ * ptrtbl fits in first block:
+ * 	[zap_phys_t zap_ptrtbl_shift < 6] [zap_leaf_t] ...
+ *
+ * ptrtbl too big for first block:
+ * 	[zap_phys_t zap_ptrtbl_shift >= 6] [zap_leaf_t] [ptrtbl] ...
+ *
+ */
+
+struct dmu_buf;
+struct zap_leaf;
+
+#define	ZBT_LEAF		((1ULL << 63) + 0)
+#define	ZBT_HEADER		((1ULL << 63) + 1)
+#define	ZBT_MICRO		((1ULL << 63) + 3)
+/* any other values are ptrtbl blocks */
+
+/*
+ * the embedded pointer table takes up half a block:
+ * block size / entry size (2^3) / 2
+ */
+#define	ZAP_EMBEDDED_PTRTBL_SHIFT(zap) (FZAP_BLOCK_SHIFT(zap) - 3 - 1)
+
+/*
+ * The embedded pointer table starts half-way through the block.  Since
+ * the pointer table itself is half the block, it starts at (64-bit)
+ * word number (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)).
+ */
+#define	ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) \
+	((uint64_t *)(zap)->zap_f.zap_phys) \
+	[(idx) + (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap))]
+
+/*
+ * TAKE NOTE:
+ * If zap_phys_t is modified, zap_byteswap() must be modified.
+ */
+typedef struct zap_phys {
+	uint64_t zap_block_type;	/* ZBT_HEADER */
+	uint64_t zap_magic;		/* ZAP_MAGIC */
+
+	struct zap_table_phys {
+		uint64_t zt_blk;	/* starting block number */
+		uint64_t zt_numblks;	/* number of blocks */
+		uint64_t zt_shift;	/* bits to index it */
+		uint64_t zt_nextblk;	/* next (larger) copy start block */
+		uint64_t zt_blks_copied; /* number source blocks copied */
+	} zap_ptrtbl;
+
+	uint64_t zap_freeblk;		/* the next free block */
+	uint64_t zap_num_leafs;		/* number of leafs */
+	uint64_t zap_num_entries;	/* number of entries */
+	uint64_t zap_salt;		/* salt to stir into hash function */
+	uint64_t zap_normflags;		/* flags for u8_textprep_str() */
+	uint64_t zap_flags;		/* zap_flags_t */
+	/*
+	 * This structure is followed by padding, and then the embedded
+	 * pointer table.  The embedded pointer table takes up second
+	 * half of the block.  It is accessed using the
+	 * ZAP_EMBEDDED_PTRTBL_ENT() macro.
+	 */
+} zap_phys_t;
+
+typedef struct zap_table_phys zap_table_phys_t;
+
+typedef struct zap {
+	objset_t *zap_objset;
+	uint64_t zap_object;
+	struct dmu_buf *zap_dbuf;
+	krwlock_t zap_rwlock;
+	boolean_t zap_ismicro;
+	int zap_normflags;
+	uint64_t zap_salt;
+	union {
+		struct {
+			zap_phys_t *zap_phys;
+
+			/*
+			 * zap_num_entries_mtx protects
+			 * zap_num_entries
+			 */
+			kmutex_t zap_num_entries_mtx;
+			int zap_block_shift;
+		} zap_fat;
+		struct {
+			mzap_phys_t *zap_phys;
+			int16_t zap_num_entries;
+			int16_t zap_num_chunks;
+			int16_t zap_alloc_next;
+			avl_tree_t zap_avl;
+		} zap_micro;
+	} zap_u;
+} zap_t;
+
+typedef struct zap_name {
+	zap_t *zn_zap;
+	int zn_key_intlen;
+	const void *zn_key_orig;
+	int zn_key_orig_numints;
+	const void *zn_key_norm;
+	int zn_key_norm_numints;
+	uint64_t zn_hash;
+	matchtype_t zn_matchtype;
+	char zn_normbuf[ZAP_MAXNAMELEN];
+} zap_name_t;
+
+#define	zap_f	zap_u.zap_fat
+#define	zap_m	zap_u.zap_micro
+
+boolean_t zap_match(zap_name_t *zn, const char *matchname);
+int zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx,
+    krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp);
+void zap_unlockdir(zap_t *zap);
+void zap_evict(dmu_buf_t *db, void *vmzap);
+zap_name_t *zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt);
+void zap_name_free(zap_name_t *zn);
+int zap_hashbits(zap_t *zap);
+uint32_t zap_maxcd(zap_t *zap);
+uint64_t zap_getflags(zap_t *zap);
+
+#define	ZAP_HASH_IDX(hash, n) (((n) == 0) ? 0 : ((hash) >> (64 - (n))))
+
+void fzap_byteswap(void *buf, size_t size);
+int fzap_count(zap_t *zap, uint64_t *count);
+int fzap_lookup(zap_name_t *zn,
+    uint64_t integer_size, uint64_t num_integers, void *buf,
+    char *realname, int rn_len, boolean_t *normalization_conflictp);
+void fzap_prefetch(zap_name_t *zn);
+int fzap_count_write(zap_name_t *zn, int add, uint64_t *towrite,
+    uint64_t *tooverwrite);
+int fzap_add(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers,
+    const void *val, dmu_tx_t *tx);
+int fzap_update(zap_name_t *zn,
+    int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx);
+int fzap_length(zap_name_t *zn,
+    uint64_t *integer_size, uint64_t *num_integers);
+int fzap_remove(zap_name_t *zn, dmu_tx_t *tx);
+int fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za);
+void fzap_get_stats(zap_t *zap, zap_stats_t *zs);
+void zap_put_leaf(struct zap_leaf *l);
+
+int fzap_add_cd(zap_name_t *zn,
+    uint64_t integer_size, uint64_t num_integers,
+    const void *val, uint32_t cd, dmu_tx_t *tx);
+void fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags);
+int fzap_cursor_move_to_key(zap_cursor_t *zc, zap_name_t *zn);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_ZAP_IMPL_H */
diff --git a/uts/common/fs/zfs/sys/zap_leaf.h b/uts/common/fs/zfs/sys/zap_leaf.h
new file mode 100644
index 000000000000..3a33636741d9
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zap_leaf.h
@@ -0,0 +1,245 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_ZAP_LEAF_H
+#define	_SYS_ZAP_LEAF_H
+
+#include <sys/zap.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct zap;
+struct zap_name;
+struct zap_stats;
+
+#define	ZAP_LEAF_MAGIC 0x2AB1EAF
+
+/* chunk size = 24 bytes */
+#define	ZAP_LEAF_CHUNKSIZE 24
+
+/*
+ * The amount of space available for chunks is:
+ * block size (1<<l->l_bs) - hash entry size (2) * number of hash
+ * entries - header space (2*chunksize)
+ */
+#define	ZAP_LEAF_NUMCHUNKS(l) \
+	(((1<<(l)->l_bs) - 2*ZAP_LEAF_HASH_NUMENTRIES(l)) / \
+	ZAP_LEAF_CHUNKSIZE - 2)
+
+/*
+ * The amount of space within the chunk available for the array is:
+ * chunk size - space for type (1) - space for next pointer (2)
+ */
+#define	ZAP_LEAF_ARRAY_BYTES (ZAP_LEAF_CHUNKSIZE - 3)
+
+#define	ZAP_LEAF_ARRAY_NCHUNKS(bytes) \
+	(((bytes)+ZAP_LEAF_ARRAY_BYTES-1)/ZAP_LEAF_ARRAY_BYTES)
+
+/*
+ * Low water mark:  when there are only this many chunks free, start
+ * growing the ptrtbl.  Ideally, this should be larger than a
+ * "reasonably-sized" entry.  20 chunks is more than enough for the
+ * largest directory entry (MAXNAMELEN (256) byte name, 8-byte value),
+ * while still being only around 3% for 16k blocks.
+ */
+#define	ZAP_LEAF_LOW_WATER (20)
+
+/*
+ * The leaf hash table has block size / 2^5 (32) number of entries,
+ * which should be more than enough for the maximum number of entries,
+ * which is less than block size / CHUNKSIZE (24) / minimum number of
+ * chunks per entry (3).
+ */
+#define	ZAP_LEAF_HASH_SHIFT(l) ((l)->l_bs - 5)
+#define	ZAP_LEAF_HASH_NUMENTRIES(l) (1 << ZAP_LEAF_HASH_SHIFT(l))
+
+/*
+ * The chunks start immediately after the hash table.  The end of the
+ * hash table is at l_hash + HASH_NUMENTRIES, which we simply cast to a
+ * chunk_t.
+ */
+#define	ZAP_LEAF_CHUNK(l, idx) \
+	((zap_leaf_chunk_t *) \
+	((l)->l_phys->l_hash + ZAP_LEAF_HASH_NUMENTRIES(l)))[idx]
+#define	ZAP_LEAF_ENTRY(l, idx) (&ZAP_LEAF_CHUNK(l, idx).l_entry)
+
+typedef enum zap_chunk_type {
+	ZAP_CHUNK_FREE = 253,
+	ZAP_CHUNK_ENTRY = 252,
+	ZAP_CHUNK_ARRAY = 251,
+	ZAP_CHUNK_TYPE_MAX = 250
+} zap_chunk_type_t;
+
+#define	ZLF_ENTRIES_CDSORTED (1<<0)
+
+/*
+ * TAKE NOTE:
+ * If zap_leaf_phys_t is modified, zap_leaf_byteswap() must be modified.
+ */
+typedef struct zap_leaf_phys {
+	struct zap_leaf_header {
+		uint64_t lh_block_type;		/* ZBT_LEAF */
+		uint64_t lh_pad1;
+		uint64_t lh_prefix;		/* hash prefix of this leaf */
+		uint32_t lh_magic;		/* ZAP_LEAF_MAGIC */
+		uint16_t lh_nfree;		/* number free chunks */
+		uint16_t lh_nentries;		/* number of entries */
+		uint16_t lh_prefix_len;		/* num bits used to id this */
+
+/* above is accessable to zap, below is zap_leaf private */
+
+		uint16_t lh_freelist;		/* chunk head of free list */
+		uint8_t lh_flags;		/* ZLF_* flags */
+		uint8_t lh_pad2[11];
+	} l_hdr; /* 2 24-byte chunks */
+
+	/*
+	 * The header is followed by a hash table with
+	 * ZAP_LEAF_HASH_NUMENTRIES(zap) entries.  The hash table is
+	 * followed by an array of ZAP_LEAF_NUMCHUNKS(zap)
+	 * zap_leaf_chunk structures.  These structures are accessed
+	 * with the ZAP_LEAF_CHUNK() macro.
+	 */
+
+	uint16_t l_hash[1];
+} zap_leaf_phys_t;
+
+typedef union zap_leaf_chunk {
+	struct zap_leaf_entry {
+		uint8_t le_type; 		/* always ZAP_CHUNK_ENTRY */
+		uint8_t le_value_intlen;	/* size of value's ints */
+		uint16_t le_next;		/* next entry in hash chain */
+		uint16_t le_name_chunk;		/* first chunk of the name */
+		uint16_t le_name_numints;	/* ints in name (incl null) */
+		uint16_t le_value_chunk;	/* first chunk of the value */
+		uint16_t le_value_numints;	/* value length in ints */
+		uint32_t le_cd;			/* collision differentiator */
+		uint64_t le_hash;		/* hash value of the name */
+	} l_entry;
+	struct zap_leaf_array {
+		uint8_t la_type;		/* always ZAP_CHUNK_ARRAY */
+		uint8_t la_array[ZAP_LEAF_ARRAY_BYTES];
+		uint16_t la_next;		/* next blk or CHAIN_END */
+	} l_array;
+	struct zap_leaf_free {
+		uint8_t lf_type;		/* always ZAP_CHUNK_FREE */
+		uint8_t lf_pad[ZAP_LEAF_ARRAY_BYTES];
+		uint16_t lf_next;	/* next in free list, or CHAIN_END */
+	} l_free;
+} zap_leaf_chunk_t;
+
+typedef struct zap_leaf {
+	krwlock_t l_rwlock;
+	uint64_t l_blkid;		/* 1<<ZAP_BLOCK_SHIFT byte block off */
+	int l_bs;			/* block size shift */
+	dmu_buf_t *l_dbuf;
+	zap_leaf_phys_t *l_phys;
+} zap_leaf_t;
+
+
+typedef struct zap_entry_handle {
+	/* below is set by zap_leaf.c and is public to zap.c */
+	uint64_t zeh_num_integers;
+	uint64_t zeh_hash;
+	uint32_t zeh_cd;
+	uint8_t zeh_integer_size;
+
+	/* below is private to zap_leaf.c */
+	uint16_t zeh_fakechunk;
+	uint16_t *zeh_chunkp;
+	zap_leaf_t *zeh_leaf;
+} zap_entry_handle_t;
+
+/*
+ * Return a handle to the named entry, or ENOENT if not found.  The hash
+ * value must equal zap_hash(name).
+ */
+extern int zap_leaf_lookup(zap_leaf_t *l,
+    struct zap_name *zn, zap_entry_handle_t *zeh);
+
+/*
+ * Return a handle to the entry with this hash+cd, or the entry with the
+ * next closest hash+cd.
+ */
+extern int zap_leaf_lookup_closest(zap_leaf_t *l,
+    uint64_t hash, uint32_t cd, zap_entry_handle_t *zeh);
+
+/*
+ * Read the first num_integers in the attribute.  Integer size
+ * conversion will be done without sign extension.  Return EINVAL if
+ * integer_size is too small.  Return EOVERFLOW if there are more than
+ * num_integers in the attribute.
+ */
+extern int zap_entry_read(const zap_entry_handle_t *zeh,
+    uint8_t integer_size, uint64_t num_integers, void *buf);
+
+extern int zap_entry_read_name(struct zap *zap, const zap_entry_handle_t *zeh,
+    uint16_t buflen, char *buf);
+
+/*
+ * Replace the value of an existing entry.
+ *
+ * zap_entry_update may fail if it runs out of space (ENOSPC).
+ */
+extern int zap_entry_update(zap_entry_handle_t *zeh,
+    uint8_t integer_size, uint64_t num_integers, const void *buf);
+
+/*
+ * Remove an entry.
+ */
+extern void zap_entry_remove(zap_entry_handle_t *zeh);
+
+/*
+ * Create an entry. An equal entry must not exist, and this entry must
+ * belong in this leaf (according to its hash value).  Fills in the
+ * entry handle on success.  Returns 0 on success or ENOSPC on failure.
+ */
+extern int zap_entry_create(zap_leaf_t *l, struct zap_name *zn, uint32_t cd,
+    uint8_t integer_size, uint64_t num_integers, const void *buf,
+    zap_entry_handle_t *zeh);
+
+/*
+ * Return true if there are additional entries with the same normalized
+ * form.
+ */
+extern boolean_t zap_entry_normalization_conflict(zap_entry_handle_t *zeh,
+    struct zap_name *zn, const char *name, struct zap *zap);
+
+/*
+ * Other stuff.
+ */
+
+extern void zap_leaf_init(zap_leaf_t *l, boolean_t sort);
+extern void zap_leaf_byteswap(zap_leaf_phys_t *buf, int len);
+extern void zap_leaf_split(zap_leaf_t *l, zap_leaf_t *nl, boolean_t sort);
+extern void zap_leaf_stats(struct zap *zap, zap_leaf_t *l,
+    struct zap_stats *zs);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_ZAP_LEAF_H */
diff --git a/uts/common/fs/zfs/sys/zfs_acl.h b/uts/common/fs/zfs/sys/zfs_acl.h
new file mode 100644
index 000000000000..c1a0aeebdce4
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_acl.h
@@ -0,0 +1,245 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_FS_ZFS_ACL_H
+#define	_SYS_FS_ZFS_ACL_H
+
+#ifdef _KERNEL
+#include <sys/isa_defs.h>
+#include <sys/types32.h>
+#endif
+#include <sys/acl.h>
+#include <sys/dmu.h>
+#include <sys/zfs_fuid.h>
+#include <sys/sa.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct znode_phys;
+
+#define	ACE_SLOT_CNT	6
+#define	ZFS_ACL_VERSION_INITIAL 0ULL
+#define	ZFS_ACL_VERSION_FUID	1ULL
+#define	ZFS_ACL_VERSION		ZFS_ACL_VERSION_FUID
+
+/*
+ * ZFS ACLs are store in various forms.
+ * Files created with ACL version ZFS_ACL_VERSION_INITIAL
+ * will all be created with fixed length ACEs of type
+ * zfs_oldace_t.
+ *
+ * Files with ACL version ZFS_ACL_VERSION_FUID will be created
+ * with various sized ACEs.  The abstraction entries will utilize
+ * zfs_ace_hdr_t, normal user/group entries will use zfs_ace_t
+ * and some specialized CIFS ACEs will use zfs_object_ace_t.
+ */
+
+/*
+ * All ACEs have a common hdr.  For
+ * owner@, group@, and everyone@ this is all
+ * thats needed.
+ */
+typedef struct zfs_ace_hdr {
+	uint16_t z_type;
+	uint16_t z_flags;
+	uint32_t z_access_mask;
+} zfs_ace_hdr_t;
+
+typedef zfs_ace_hdr_t zfs_ace_abstract_t;
+
+/*
+ * Standard ACE
+ */
+typedef struct zfs_ace {
+	zfs_ace_hdr_t	z_hdr;
+	uint64_t	z_fuid;
+} zfs_ace_t;
+
+/*
+ * The following type only applies to ACE_ACCESS_ALLOWED|DENIED_OBJECT_ACE_TYPE
+ * and will only be set/retrieved in a CIFS context.
+ */
+
+typedef struct zfs_object_ace {
+	zfs_ace_t	z_ace;
+	uint8_t		z_object_type[16]; /* object type */
+	uint8_t		z_inherit_type[16]; /* inherited object type */
+} zfs_object_ace_t;
+
+typedef struct zfs_oldace {
+	uint32_t	z_fuid;		/* "who" */
+	uint32_t	z_access_mask;  /* access mask */
+	uint16_t	z_flags;	/* flags, i.e inheritance */
+	uint16_t	z_type;		/* type of entry allow/deny */
+} zfs_oldace_t;
+
+typedef struct zfs_acl_phys_v0 {
+	uint64_t	z_acl_extern_obj;	/* ext acl pieces */
+	uint32_t	z_acl_count;		/* Number of ACEs */
+	uint16_t	z_acl_version;		/* acl version */
+	uint16_t	z_acl_pad;		/* pad */
+	zfs_oldace_t	z_ace_data[ACE_SLOT_CNT]; /* 6 standard ACEs */
+} zfs_acl_phys_v0_t;
+
+#define	ZFS_ACE_SPACE	(sizeof (zfs_oldace_t) * ACE_SLOT_CNT)
+
+/*
+ * Size of ACL count is always 2 bytes.
+ * Necessary to for dealing with both V0 ACL and V1 ACL layout
+ */
+#define	ZFS_ACL_COUNT_SIZE	(sizeof (uint16_t))
+
+typedef struct zfs_acl_phys {
+	uint64_t	z_acl_extern_obj;	  /* ext acl pieces */
+	uint32_t	z_acl_size;		  /* Number of bytes in ACL */
+	uint16_t	z_acl_version;		  /* acl version */
+	uint16_t	z_acl_count;		  /* ace count */
+	uint8_t	z_ace_data[ZFS_ACE_SPACE]; /* space for embedded ACEs */
+} zfs_acl_phys_t;
+
+typedef struct acl_ops {
+	uint32_t	(*ace_mask_get) (void *acep); /* get  access mask */
+	void 		(*ace_mask_set) (void *acep,
+			    uint32_t mask); /* set access mask */
+	uint16_t	(*ace_flags_get) (void *acep);	/* get flags */
+	void		(*ace_flags_set) (void *acep,
+			    uint16_t flags); /* set flags */
+	uint16_t	(*ace_type_get)(void *acep); /* get type */
+	void		(*ace_type_set)(void *acep,
+			    uint16_t type); /* set type */
+	uint64_t	(*ace_who_get)(void *acep); /* get who/fuid */
+	void		(*ace_who_set)(void *acep,
+			    uint64_t who); /* set who/fuid */
+	size_t		(*ace_size)(void *acep); /* how big is this ace */
+	size_t		(*ace_abstract_size)(void); /* sizeof abstract entry */
+	int		(*ace_mask_off)(void); /* off of access mask in ace */
+	int		(*ace_data)(void *acep, void **datap);
+			    /* ptr to data if any */
+} acl_ops_t;
+
+/*
+ * A zfs_acl_t structure is composed of a list of zfs_acl_node_t's.
+ * Each node will have one or more ACEs associated with it.  You will
+ * only have multiple nodes during a chmod operation.   Normally only
+ * one node is required.
+ */
+typedef struct zfs_acl_node {
+	list_node_t	z_next;		/* Next chunk of ACEs */
+	void		*z_acldata;	/* pointer into actual ACE(s) */
+	void		*z_allocdata;	/* pointer to kmem allocated memory */
+	size_t		z_allocsize;	/* Size of blob in bytes */
+	size_t		z_size;		/* length of ACL data */
+	uint64_t	z_ace_count;	/* number of ACEs in this acl node */
+	int		z_ace_idx;	/* ace iterator positioned on */
+} zfs_acl_node_t;
+
+typedef struct zfs_acl {
+	uint64_t	z_acl_count;	/* Number of ACEs */
+	size_t		z_acl_bytes;	/* Number of bytes in ACL */
+	uint_t		z_version;	/* version of ACL */
+	void		*z_next_ace;	/* pointer to next ACE */
+	uint64_t	z_hints;	/* ACL hints (ZFS_INHERIT_ACE ...) */
+	zfs_acl_node_t	*z_curr_node;	/* current node iterator is handling */
+	list_t		z_acl;		/* chunks of ACE data */
+	acl_ops_t	z_ops;		/* ACL operations */
+} zfs_acl_t;
+
+typedef struct acl_locator_cb {
+	zfs_acl_t *cb_aclp;
+	zfs_acl_node_t *cb_acl_node;
+} zfs_acl_locator_cb_t;
+
+#define	ACL_DATA_ALLOCED	0x1
+#define	ZFS_ACL_SIZE(aclcnt)	(sizeof (ace_t) * (aclcnt))
+
+struct zfs_fuid_info;
+
+typedef struct zfs_acl_ids {
+	uint64_t		z_fuid;		/* file owner fuid */
+	uint64_t		z_fgid;		/* file group owner fuid */
+	uint64_t		z_mode;		/* mode to set on create */
+	zfs_acl_t		*z_aclp;	/* ACL to create with file */
+	struct zfs_fuid_info 	*z_fuidp;	/* for tracking fuids for log */
+} zfs_acl_ids_t;
+
+/*
+ * Property values for acl_mode and acl_inherit.
+ *
+ * acl_mode can take discard, noallow, groupmask and passthrough.
+ * whereas acl_inherit has secure instead of groupmask.
+ */
+
+#define	ZFS_ACL_DISCARD		0
+#define	ZFS_ACL_NOALLOW		1
+#define	ZFS_ACL_GROUPMASK	2
+#define	ZFS_ACL_PASSTHROUGH	3
+#define	ZFS_ACL_RESTRICTED	4
+#define	ZFS_ACL_PASSTHROUGH_X	5
+
+struct znode;
+struct zfsvfs;
+
+#ifdef _KERNEL
+int zfs_acl_ids_create(struct znode *, int, vattr_t *,
+    cred_t *, vsecattr_t *, zfs_acl_ids_t *);
+void zfs_acl_ids_free(zfs_acl_ids_t *);
+boolean_t zfs_acl_ids_overquota(struct zfsvfs *, zfs_acl_ids_t *);
+int zfs_getacl(struct znode *, vsecattr_t *, boolean_t, cred_t *);
+int zfs_setacl(struct znode *, vsecattr_t *, boolean_t, cred_t *);
+void zfs_acl_rele(void *);
+void zfs_oldace_byteswap(ace_t *, int);
+void zfs_ace_byteswap(void *, size_t, boolean_t);
+extern boolean_t zfs_has_access(struct znode *zp, cred_t *cr);
+extern int zfs_zaccess(struct znode *, int, int, boolean_t, cred_t *);
+int zfs_fastaccesschk_execute(struct znode *, cred_t *);
+extern int zfs_zaccess_rwx(struct znode *, mode_t, int, cred_t *);
+extern int zfs_zaccess_unix(struct znode *, mode_t, cred_t *);
+extern int zfs_acl_access(struct znode *, int, cred_t *);
+void zfs_acl_chmod_setattr(struct znode *, zfs_acl_t **, uint64_t);
+int zfs_zaccess_delete(struct znode *, struct znode *, cred_t *);
+int zfs_zaccess_rename(struct znode *, struct znode *,
+    struct znode *, struct znode *, cred_t *cr);
+void zfs_acl_free(zfs_acl_t *);
+int zfs_vsec_2_aclp(struct zfsvfs *, vtype_t, vsecattr_t *, cred_t *,
+    struct zfs_fuid_info **, zfs_acl_t **);
+int zfs_aclset_common(struct znode *, zfs_acl_t *, cred_t *, dmu_tx_t *);
+uint64_t zfs_external_acl(struct znode *);
+int zfs_znode_acl_version(struct znode *);
+int zfs_acl_size(struct znode *, int *);
+zfs_acl_t *zfs_acl_alloc(int);
+zfs_acl_node_t *zfs_acl_node_alloc(size_t);
+void zfs_acl_xform(struct znode *, zfs_acl_t *, cred_t *);
+void zfs_acl_data_locator(void **, uint32_t *, uint32_t, boolean_t, void *);
+uint64_t zfs_mode_compute(uint64_t, zfs_acl_t *,
+    uint64_t *, uint64_t, uint64_t);
+int zfs_acl_chown_setattr(struct znode *);
+
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+#endif	/* _SYS_FS_ZFS_ACL_H */
diff --git a/uts/common/fs/zfs/sys/zfs_context.h b/uts/common/fs/zfs/sys/zfs_context.h
new file mode 100644
index 000000000000..558e9e1884e3
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_context.h
@@ -0,0 +1,73 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_ZFS_CONTEXT_H
+#define	_SYS_ZFS_CONTEXT_H
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#include <sys/note.h>
+#include <sys/types.h>
+#include <sys/t_lock.h>
+#include <sys/atomic.h>
+#include <sys/sysmacros.h>
+#include <sys/bitmap.h>
+#include <sys/cmn_err.h>
+#include <sys/kmem.h>
+#include <sys/taskq.h>
+#include <sys/buf.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/cpuvar.h>
+#include <sys/kobj.h>
+#include <sys/conf.h>
+#include <sys/disp.h>
+#include <sys/debug.h>
+#include <sys/random.h>
+#include <sys/byteorder.h>
+#include <sys/systm.h>
+#include <sys/list.h>
+#include <sys/uio.h>
+#include <sys/dirent.h>
+#include <sys/time.h>
+#include <vm/seg_kmem.h>
+#include <sys/zone.h>
+#include <sys/uio.h>
+#include <sys/zfs_debug.h>
+#include <sys/sysevent.h>
+#include <sys/sysevent/eventdefs.h>
+#include <sys/sysevent/dev.h>
+#include <sys/fm/util.h>
+#include <sys/sunddi.h>
+
+#define	CPU_SEQID	(CPU->cpu_seqid)
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ZFS_CONTEXT_H */
diff --git a/uts/common/fs/zfs/sys/zfs_ctldir.h b/uts/common/fs/zfs/sys/zfs_ctldir.h
new file mode 100644
index 000000000000..f88ef95fdca8
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_ctldir.h
@@ -0,0 +1,73 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_ZFS_CTLDIR_H
+#define	_ZFS_CTLDIR_H
+
+#include <sys/pathname.h>
+#include <sys/vnode.h>
+#include <sys/zfs_vfsops.h>
+#include <sys/zfs_znode.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#define	ZFS_CTLDIR_NAME		".zfs"
+
+#define	zfs_has_ctldir(zdp)	\
+	((zdp)->z_id == (zdp)->z_zfsvfs->z_root && \
+	((zdp)->z_zfsvfs->z_ctldir != NULL))
+#define	zfs_show_ctldir(zdp)	\
+	(zfs_has_ctldir(zdp) && \
+	((zdp)->z_zfsvfs->z_show_ctldir))
+
+void zfsctl_create(zfsvfs_t *);
+void zfsctl_destroy(zfsvfs_t *);
+vnode_t *zfsctl_root(znode_t *);
+void zfsctl_init(void);
+void zfsctl_fini(void);
+boolean_t zfsctl_is_node(vnode_t *);
+
+int zfsctl_rename_snapshot(const char *from, const char *to);
+int zfsctl_destroy_snapshot(const char *snapname, int force);
+int zfsctl_umount_snapshots(vfs_t *, int, cred_t *);
+
+int zfsctl_root_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
+    int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct,
+    int *direntflags, pathname_t *realpnp);
+
+int zfsctl_make_fid(zfsvfs_t *zfsvfsp, uint64_t object, uint32_t gen,
+    fid_t *fidp);
+int zfsctl_lookup_objset(vfs_t *vfsp, uint64_t objsetid, zfsvfs_t **zfsvfsp);
+
+#define	ZFSCTL_INO_ROOT		0x1
+#define	ZFSCTL_INO_SNAPDIR	0x2
+#define	ZFSCTL_INO_SHARES	0x3
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _ZFS_CTLDIR_H */
diff --git a/uts/common/fs/zfs/sys/zfs_debug.h b/uts/common/fs/zfs/sys/zfs_debug.h
new file mode 100644
index 000000000000..50ecf9b36249
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_debug.h
@@ -0,0 +1,82 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_ZFS_DEBUG_H
+#define	_SYS_ZFS_DEBUG_H
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#ifndef TRUE
+#define	TRUE 1
+#endif
+
+#ifndef FALSE
+#define	FALSE 0
+#endif
+
+/*
+ * ZFS debugging
+ */
+
+#if defined(DEBUG) || !defined(_KERNEL)
+#define	ZFS_DEBUG
+#endif
+
+extern int zfs_flags;
+
+#define	ZFS_DEBUG_DPRINTF	0x0001
+#define	ZFS_DEBUG_DBUF_VERIFY	0x0002
+#define	ZFS_DEBUG_DNODE_VERIFY	0x0004
+#define	ZFS_DEBUG_SNAPNAMES	0x0008
+#define	ZFS_DEBUG_MODIFY	0x0010
+
+#ifdef ZFS_DEBUG
+extern void __dprintf(const char *file, const char *func,
+    int line, const char *fmt, ...);
+#define	dprintf(...) \
+	if (zfs_flags & ZFS_DEBUG_DPRINTF) \
+		__dprintf(__FILE__, __func__, __LINE__, __VA_ARGS__)
+#else
+#define	dprintf(...) ((void)0)
+#endif /* ZFS_DEBUG */
+
+extern void zfs_panic_recover(const char *fmt, ...);
+
+typedef struct zfs_dbgmsg {
+	list_node_t zdm_node;
+	time_t zdm_timestamp;
+	char zdm_msg[1]; /* variable length allocation */
+} zfs_dbgmsg_t;
+
+extern void zfs_dbgmsg_init(void);
+extern void zfs_dbgmsg_fini(void);
+extern void zfs_dbgmsg(const char *fmt, ...);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ZFS_DEBUG_H */
diff --git a/uts/common/fs/zfs/sys/zfs_dir.h b/uts/common/fs/zfs/sys/zfs_dir.h
new file mode 100644
index 000000000000..349f8ef37321
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_dir.h
@@ -0,0 +1,74 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_FS_ZFS_DIR_H
+#define	_SYS_FS_ZFS_DIR_H
+
+#include <sys/pathname.h>
+#include <sys/dmu.h>
+#include <sys/zfs_znode.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/* zfs_dirent_lock() flags */
+#define	ZNEW		0x0001		/* entry should not exist */
+#define	ZEXISTS		0x0002		/* entry should exist */
+#define	ZSHARED		0x0004		/* shared access (zfs_dirlook()) */
+#define	ZXATTR		0x0008		/* we want the xattr dir */
+#define	ZRENAMING	0x0010		/* znode is being renamed */
+#define	ZCILOOK		0x0020		/* case-insensitive lookup requested */
+#define	ZCIEXACT	0x0040		/* c-i requires c-s match (rename) */
+#define	ZHAVELOCK	0x0080		/* z_name_lock is already held */
+
+/* mknode flags */
+#define	IS_ROOT_NODE	0x01		/* create a root node */
+#define	IS_XATTR	0x02		/* create an extended attribute node */
+
+extern int zfs_dirent_lock(zfs_dirlock_t **, znode_t *, char *, znode_t **,
+    int, int *, pathname_t *);
+extern void zfs_dirent_unlock(zfs_dirlock_t *);
+extern int zfs_link_create(zfs_dirlock_t *, znode_t *, dmu_tx_t *, int);
+extern int zfs_link_destroy(zfs_dirlock_t *, znode_t *, dmu_tx_t *, int,
+    boolean_t *);
+extern int zfs_dirlook(znode_t *, char *, vnode_t **, int, int *,
+    pathname_t *);
+extern void zfs_mknode(znode_t *, vattr_t *, dmu_tx_t *, cred_t *,
+    uint_t, znode_t **, zfs_acl_ids_t *);
+extern void zfs_rmnode(znode_t *);
+extern void zfs_dl_name_switch(zfs_dirlock_t *dl, char *new, char **old);
+extern boolean_t zfs_dirempty(znode_t *);
+extern void zfs_unlinked_add(znode_t *, dmu_tx_t *);
+extern void zfs_unlinked_drain(zfsvfs_t *zfsvfs);
+extern int zfs_sticky_remove_access(znode_t *, znode_t *, cred_t *cr);
+extern int zfs_get_xattrdir(znode_t *, vnode_t **, cred_t *, int);
+extern int zfs_make_xattrdir(znode_t *, vattr_t *, vnode_t **, cred_t *);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_FS_ZFS_DIR_H */
diff --git a/uts/common/fs/zfs/sys/zfs_fuid.h b/uts/common/fs/zfs/sys/zfs_fuid.h
new file mode 100644
index 000000000000..0feb3ce4bb7c
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_fuid.h
@@ -0,0 +1,131 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_FS_ZFS_FUID_H
+#define	_SYS_FS_ZFS_FUID_H
+
+#ifdef _KERNEL
+#include <sys/kidmap.h>
+#include <sys/sid.h>
+#include <sys/dmu.h>
+#include <sys/zfs_vfsops.h>
+#endif
+#include <sys/avl.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+	ZFS_OWNER,
+	ZFS_GROUP,
+	ZFS_ACE_USER,
+	ZFS_ACE_GROUP
+} zfs_fuid_type_t;
+
+/*
+ * Estimate space needed for one more fuid table entry.
+ * for now assume its current size + 1K
+ */
+#define	FUID_SIZE_ESTIMATE(z) ((z)->z_fuid_size + (SPA_MINBLOCKSIZE << 1))
+
+#define	FUID_INDEX(x)	((x) >> 32)
+#define	FUID_RID(x)	((x) & 0xffffffff)
+#define	FUID_ENCODE(idx, rid) (((uint64_t)(idx) << 32) | (rid))
+/*
+ * FUIDs cause problems for the intent log
+ * we need to replay the creation of the FUID,
+ * but we can't count on the idmapper to be around
+ * and during replay the FUID index may be different than
+ * before.  Also, if an ACL has 100 ACEs and 12 different
+ * domains we don't want to log 100 domain strings, but rather
+ * just the unique 12.
+ */
+
+/*
+ * The FUIDs in the log will index into
+ * domain string table and the bottom half will be the rid.
+ * Used for mapping ephemeral uid/gid during ACL setting to FUIDs
+ */
+typedef struct zfs_fuid {
+	list_node_t 	z_next;
+	uint64_t 	z_id;		/* uid/gid being converted to fuid */
+	uint64_t	z_domidx;	/* index in AVL domain table */
+	uint64_t	z_logfuid;	/* index for domain in log */
+} zfs_fuid_t;
+
+/* list of unique domains */
+typedef struct zfs_fuid_domain {
+	list_node_t	z_next;
+	uint64_t	z_domidx;	/* AVL tree idx */
+	const char	*z_domain;	/* domain string */
+} zfs_fuid_domain_t;
+
+/*
+ * FUID information necessary for logging create, setattr, and setacl.
+ */
+typedef struct zfs_fuid_info {
+	list_t	z_fuids;
+	list_t	z_domains;
+	uint64_t z_fuid_owner;
+	uint64_t z_fuid_group;
+	char **z_domain_table;  /* Used during replay */
+	uint32_t z_fuid_cnt;	/* How many fuids in z_fuids */
+	uint32_t z_domain_cnt;	/* How many domains */
+	size_t	z_domain_str_sz; /* len of domain strings z_domain list */
+} zfs_fuid_info_t;
+
+#ifdef _KERNEL
+struct znode;
+extern uid_t zfs_fuid_map_id(zfsvfs_t *, uint64_t, cred_t *, zfs_fuid_type_t);
+extern void zfs_fuid_node_add(zfs_fuid_info_t **, const char *, uint32_t,
+    uint64_t, uint64_t, zfs_fuid_type_t);
+extern void zfs_fuid_destroy(zfsvfs_t *);
+extern uint64_t zfs_fuid_create_cred(zfsvfs_t *, zfs_fuid_type_t,
+    cred_t *, zfs_fuid_info_t **);
+extern uint64_t zfs_fuid_create(zfsvfs_t *, uint64_t, cred_t *, zfs_fuid_type_t,
+    zfs_fuid_info_t **);
+extern void zfs_fuid_map_ids(struct znode *zp, cred_t *cr,
+    uid_t *uid, uid_t *gid);
+extern zfs_fuid_info_t *zfs_fuid_info_alloc(void);
+extern void zfs_fuid_info_free(zfs_fuid_info_t *);
+extern boolean_t zfs_groupmember(zfsvfs_t *, uint64_t, cred_t *);
+void zfs_fuid_sync(zfsvfs_t *, dmu_tx_t *);
+extern int zfs_fuid_find_by_domain(zfsvfs_t *, const char *domain,
+    char **retdomain, boolean_t addok);
+extern const char *zfs_fuid_find_by_idx(zfsvfs_t *zfsvfs, uint32_t idx);
+extern void zfs_fuid_txhold(zfsvfs_t *zfsvfs, dmu_tx_t *tx);
+#endif
+
+char *zfs_fuid_idx_domain(avl_tree_t *, uint32_t);
+void zfs_fuid_avl_tree_create(avl_tree_t *, avl_tree_t *);
+uint64_t zfs_fuid_table_load(objset_t *, uint64_t, avl_tree_t *, avl_tree_t *);
+void zfs_fuid_table_destroy(avl_tree_t *, avl_tree_t *);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_FS_ZFS_FUID_H */
diff --git a/uts/common/fs/zfs/sys/zfs_ioctl.h b/uts/common/fs/zfs/sys/zfs_ioctl.h
new file mode 100644
index 000000000000..84bf794fe5f0
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_ioctl.h
@@ -0,0 +1,349 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_ZFS_IOCTL_H
+#define	_SYS_ZFS_IOCTL_H
+
+#include <sys/cred.h>
+#include <sys/dmu.h>
+#include <sys/zio.h>
+#include <sys/dsl_deleg.h>
+#include <sys/spa.h>
+#include <sys/zfs_stat.h>
+
+#ifdef _KERNEL
+#include <sys/nvpair.h>
+#endif	/* _KERNEL */
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Property values for snapdir
+ */
+#define	ZFS_SNAPDIR_HIDDEN		0
+#define	ZFS_SNAPDIR_VISIBLE		1
+
+/*
+ * Field manipulation macros for the drr_versioninfo field of the
+ * send stream header.
+ */
+
+/*
+ * Header types for zfs send streams.
+ */
+typedef enum drr_headertype {
+	DMU_SUBSTREAM = 0x1,
+	DMU_COMPOUNDSTREAM = 0x2
+} drr_headertype_t;
+
+#define	DMU_GET_STREAM_HDRTYPE(vi)	BF64_GET((vi), 0, 2)
+#define	DMU_SET_STREAM_HDRTYPE(vi, x)	BF64_SET((vi), 0, 2, x)
+
+#define	DMU_GET_FEATUREFLAGS(vi)	BF64_GET((vi), 2, 30)
+#define	DMU_SET_FEATUREFLAGS(vi, x)	BF64_SET((vi), 2, 30, x)
+
+/*
+ * Feature flags for zfs send streams (flags in drr_versioninfo)
+ */
+
+#define	DMU_BACKUP_FEATURE_DEDUP	(0x1)
+#define	DMU_BACKUP_FEATURE_DEDUPPROPS	(0x2)
+#define	DMU_BACKUP_FEATURE_SA_SPILL	(0x4)
+
+/*
+ * Mask of all supported backup features
+ */
+#define	DMU_BACKUP_FEATURE_MASK	(DMU_BACKUP_FEATURE_DEDUP | \
+		DMU_BACKUP_FEATURE_DEDUPPROPS | DMU_BACKUP_FEATURE_SA_SPILL)
+
+/* Are all features in the given flag word currently supported? */
+#define	DMU_STREAM_SUPPORTED(x)	(!((x) & ~DMU_BACKUP_FEATURE_MASK))
+
+/*
+ * The drr_versioninfo field of the dmu_replay_record has the
+ * following layout:
+ *
+ *	64	56	48	40	32	24	16	8	0
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ *  	|		reserved	|        feature-flags	    |C|S|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ *
+ * The low order two bits indicate the header type: SUBSTREAM (0x1)
+ * or COMPOUNDSTREAM (0x2).  Using two bits for this is historical:
+ * this field used to be a version number, where the two version types
+ * were 1 and 2.  Using two bits for this allows earlier versions of
+ * the code to be able to recognize send streams that don't use any
+ * of the features indicated by feature flags.
+ */
+
+#define	DMU_BACKUP_MAGIC 0x2F5bacbacULL
+
+#define	DRR_FLAG_CLONE		(1<<0)
+#define	DRR_FLAG_CI_DATA	(1<<1)
+
+/*
+ * flags in the drr_checksumflags field in the DRR_WRITE and
+ * DRR_WRITE_BYREF blocks
+ */
+#define	DRR_CHECKSUM_DEDUP	(1<<0)
+
+#define	DRR_IS_DEDUP_CAPABLE(flags)	((flags) & DRR_CHECKSUM_DEDUP)
+
+/*
+ * zfs ioctl command structure
+ */
+typedef struct dmu_replay_record {
+	enum {
+		DRR_BEGIN, DRR_OBJECT, DRR_FREEOBJECTS,
+		DRR_WRITE, DRR_FREE, DRR_END, DRR_WRITE_BYREF,
+		DRR_SPILL, DRR_NUMTYPES
+	} drr_type;
+	uint32_t drr_payloadlen;
+	union {
+		struct drr_begin {
+			uint64_t drr_magic;
+			uint64_t drr_versioninfo; /* was drr_version */
+			uint64_t drr_creation_time;
+			dmu_objset_type_t drr_type;
+			uint32_t drr_flags;
+			uint64_t drr_toguid;
+			uint64_t drr_fromguid;
+			char drr_toname[MAXNAMELEN];
+		} drr_begin;
+		struct drr_end {
+			zio_cksum_t drr_checksum;
+			uint64_t drr_toguid;
+		} drr_end;
+		struct drr_object {
+			uint64_t drr_object;
+			dmu_object_type_t drr_type;
+			dmu_object_type_t drr_bonustype;
+			uint32_t drr_blksz;
+			uint32_t drr_bonuslen;
+			uint8_t drr_checksumtype;
+			uint8_t drr_compress;
+			uint8_t drr_pad[6];
+			uint64_t drr_toguid;
+			/* bonus content follows */
+		} drr_object;
+		struct drr_freeobjects {
+			uint64_t drr_firstobj;
+			uint64_t drr_numobjs;
+			uint64_t drr_toguid;
+		} drr_freeobjects;
+		struct drr_write {
+			uint64_t drr_object;
+			dmu_object_type_t drr_type;
+			uint32_t drr_pad;
+			uint64_t drr_offset;
+			uint64_t drr_length;
+			uint64_t drr_toguid;
+			uint8_t drr_checksumtype;
+			uint8_t drr_checksumflags;
+			uint8_t drr_pad2[6];
+			ddt_key_t drr_key; /* deduplication key */
+			/* content follows */
+		} drr_write;
+		struct drr_free {
+			uint64_t drr_object;
+			uint64_t drr_offset;
+			uint64_t drr_length;
+			uint64_t drr_toguid;
+		} drr_free;
+		struct drr_write_byref {
+			/* where to put the data */
+			uint64_t drr_object;
+			uint64_t drr_offset;
+			uint64_t drr_length;
+			uint64_t drr_toguid;
+			/* where to find the prior copy of the data */
+			uint64_t drr_refguid;
+			uint64_t drr_refobject;
+			uint64_t drr_refoffset;
+			/* properties of the data */
+			uint8_t drr_checksumtype;
+			uint8_t drr_checksumflags;
+			uint8_t drr_pad2[6];
+			ddt_key_t drr_key; /* deduplication key */
+		} drr_write_byref;
+		struct drr_spill {
+			uint64_t drr_object;
+			uint64_t drr_length;
+			uint64_t drr_toguid;
+			uint64_t drr_pad[4]; /* needed for crypto */
+			/* spill data follows */
+		} drr_spill;
+	} drr_u;
+} dmu_replay_record_t;
+
+/* diff record range types */
+typedef enum diff_type {
+	DDR_NONE = 0x1,
+	DDR_INUSE = 0x2,
+	DDR_FREE = 0x4
+} diff_type_t;
+
+/*
+ * The diff reports back ranges of free or in-use objects.
+ */
+typedef struct dmu_diff_record {
+	uint64_t ddr_type;
+	uint64_t ddr_first;
+	uint64_t ddr_last;
+} dmu_diff_record_t;
+
+typedef struct zinject_record {
+	uint64_t	zi_objset;
+	uint64_t	zi_object;
+	uint64_t	zi_start;
+	uint64_t	zi_end;
+	uint64_t	zi_guid;
+	uint32_t	zi_level;
+	uint32_t	zi_error;
+	uint64_t	zi_type;
+	uint32_t	zi_freq;
+	uint32_t	zi_failfast;
+	char		zi_func[MAXNAMELEN];
+	uint32_t	zi_iotype;
+	int32_t		zi_duration;
+	uint64_t	zi_timer;
+} zinject_record_t;
+
+#define	ZINJECT_NULL		0x1
+#define	ZINJECT_FLUSH_ARC	0x2
+#define	ZINJECT_UNLOAD_SPA	0x4
+
+typedef struct zfs_share {
+	uint64_t	z_exportdata;
+	uint64_t	z_sharedata;
+	uint64_t	z_sharetype;	/* 0 = share, 1 = unshare */
+	uint64_t	z_sharemax;  /* max length of share string */
+} zfs_share_t;
+
+/*
+ * ZFS file systems may behave the usual, POSIX-compliant way, where
+ * name lookups are case-sensitive.  They may also be set up so that
+ * all the name lookups are case-insensitive, or so that only some
+ * lookups, the ones that set an FIGNORECASE flag, are case-insensitive.
+ */
+typedef enum zfs_case {
+	ZFS_CASE_SENSITIVE,
+	ZFS_CASE_INSENSITIVE,
+	ZFS_CASE_MIXED
+} zfs_case_t;
+
+typedef struct zfs_cmd {
+	char		zc_name[MAXPATHLEN];
+	char		zc_value[MAXPATHLEN * 2];
+	char		zc_string[MAXNAMELEN];
+	char		zc_top_ds[MAXPATHLEN];
+	uint64_t	zc_guid;
+	uint64_t	zc_nvlist_conf;		/* really (char *) */
+	uint64_t	zc_nvlist_conf_size;
+	uint64_t	zc_nvlist_src;		/* really (char *) */
+	uint64_t	zc_nvlist_src_size;
+	uint64_t	zc_nvlist_dst;		/* really (char *) */
+	uint64_t	zc_nvlist_dst_size;
+	uint64_t	zc_cookie;
+	uint64_t	zc_objset_type;
+	uint64_t	zc_perm_action;
+	uint64_t 	zc_history;		/* really (char *) */
+	uint64_t 	zc_history_len;
+	uint64_t	zc_history_offset;
+	uint64_t	zc_obj;
+	uint64_t	zc_iflags;		/* internal to zfs(7fs) */
+	zfs_share_t	zc_share;
+	dmu_objset_stats_t zc_objset_stats;
+	struct drr_begin zc_begin_record;
+	zinject_record_t zc_inject_record;
+	boolean_t	zc_defer_destroy;
+	boolean_t	zc_temphold;
+	uint64_t	zc_action_handle;
+	int		zc_cleanup_fd;
+	uint8_t		zc_pad[4];		/* alignment */
+	uint64_t	zc_sendobj;
+	uint64_t	zc_fromobj;
+	uint64_t	zc_createtxg;
+	zfs_stat_t	zc_stat;
+} zfs_cmd_t;
+
+typedef struct zfs_useracct {
+	char zu_domain[256];
+	uid_t zu_rid;
+	uint32_t zu_pad;
+	uint64_t zu_space;
+} zfs_useracct_t;
+
+#define	ZFSDEV_MAX_MINOR	(1 << 16)
+#define	ZFS_MIN_MINOR	(ZFSDEV_MAX_MINOR + 1)
+
+#define	ZPOOL_EXPORT_AFTER_SPLIT 0x1
+
+#ifdef _KERNEL
+
+typedef struct zfs_creat {
+	nvlist_t	*zct_zplprops;
+	nvlist_t	*zct_props;
+} zfs_creat_t;
+
+extern dev_info_t *zfs_dip;
+
+extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
+extern int zfs_secpolicy_rename_perms(const char *from,
+    const char *to, cred_t *cr);
+extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
+extern int zfs_busy(void);
+extern int zfs_unmount_snap(const char *, void *);
+
+/*
+ * ZFS minor numbers can refer to either a control device instance or
+ * a zvol. Depending on the value of zss_type, zss_data points to either
+ * a zvol_state_t or a zfs_onexit_t.
+ */
+enum zfs_soft_state_type {
+	ZSST_ZVOL,
+	ZSST_CTLDEV
+};
+
+typedef struct zfs_soft_state {
+	enum zfs_soft_state_type zss_type;
+	void *zss_data;
+} zfs_soft_state_t;
+
+extern void *zfsdev_get_soft_state(minor_t minor,
+    enum zfs_soft_state_type which);
+extern minor_t zfsdev_minor_alloc(void);
+
+extern void *zfsdev_state;
+extern kmutex_t zfsdev_state_lock;
+
+#endif	/* _KERNEL */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ZFS_IOCTL_H */
diff --git a/uts/common/fs/zfs/sys/zfs_onexit.h b/uts/common/fs/zfs/sys/zfs_onexit.h
new file mode 100644
index 000000000000..4982bd4d0afc
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_onexit.h
@@ -0,0 +1,66 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_ZFS_ONEXIT_H
+#define	_SYS_ZFS_ONEXIT_H
+
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#ifdef _KERNEL
+
+typedef struct zfs_onexit {
+	kmutex_t	zo_lock;
+	list_t		zo_actions;
+} zfs_onexit_t;
+
+typedef struct zfs_onexit_action_node {
+	list_node_t	za_link;
+	void		(*za_func)(void *);
+	void		*za_data;
+} zfs_onexit_action_node_t;
+
+extern void zfs_onexit_init(zfs_onexit_t **zo);
+extern void zfs_onexit_destroy(zfs_onexit_t *zo);
+
+#endif
+
+extern int zfs_onexit_fd_hold(int fd, minor_t *minorp);
+extern void zfs_onexit_fd_rele(int fd);
+extern int zfs_onexit_add_cb(minor_t minor, void (*func)(void *), void *data,
+    uint64_t *action_handle);
+extern int zfs_onexit_del_cb(minor_t minor, uint64_t action_handle,
+    boolean_t fire);
+extern int zfs_onexit_cb_data(minor_t minor, uint64_t action_handle,
+    void **data);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ZFS_ONEXIT_H */
diff --git a/uts/common/fs/zfs/sys/zfs_rlock.h b/uts/common/fs/zfs/sys/zfs_rlock.h
new file mode 100644
index 000000000000..f302b663e22a
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_rlock.h
@@ -0,0 +1,89 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_FS_ZFS_RLOCK_H
+#define	_SYS_FS_ZFS_RLOCK_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#ifdef _KERNEL
+
+#include <sys/zfs_znode.h>
+
+typedef enum {
+	RL_READER,
+	RL_WRITER,
+	RL_APPEND
+} rl_type_t;
+
+typedef struct rl {
+	znode_t *r_zp;		/* znode this lock applies to */
+	avl_node_t r_node;	/* avl node link */
+	uint64_t r_off;		/* file range offset */
+	uint64_t r_len;		/* file range length */
+	uint_t r_cnt;		/* range reference count in tree */
+	rl_type_t r_type;	/* range type */
+	kcondvar_t r_wr_cv;	/* cv for waiting writers */
+	kcondvar_t r_rd_cv;	/* cv for waiting readers */
+	uint8_t r_proxy;	/* acting for original range */
+	uint8_t r_write_wanted;	/* writer wants to lock this range */
+	uint8_t r_read_wanted;	/* reader wants to lock this range */
+} rl_t;
+
+/*
+ * Lock a range (offset, length) as either shared (READER)
+ * or exclusive (WRITER or APPEND). APPEND is a special type that
+ * is converted to WRITER that specified to lock from the start of the
+ * end of file.  zfs_range_lock() returns the range lock structure.
+ */
+rl_t *zfs_range_lock(znode_t *zp, uint64_t off, uint64_t len, rl_type_t type);
+
+/*
+ * Unlock range and destroy range lock structure.
+ */
+void zfs_range_unlock(rl_t *rl);
+
+/*
+ * Reduce range locked as RW_WRITER from whole file to specified range.
+ * Asserts the whole file was previously locked.
+ */
+void zfs_range_reduce(rl_t *rl, uint64_t off, uint64_t len);
+
+/*
+ * AVL comparison function used to compare range locks
+ */
+int zfs_range_compare(const void *arg1, const void *arg2);
+
+#endif /* _KERNEL */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_FS_ZFS_RLOCK_H */
diff --git a/uts/common/fs/zfs/sys/zfs_sa.h b/uts/common/fs/zfs/sys/zfs_sa.h
new file mode 100644
index 000000000000..cd312b27a94d
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_sa.h
@@ -0,0 +1,143 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_ZFS_SA_H
+#define	_SYS_ZFS_SA_H
+
+#ifdef _KERNEL
+#include <sys/types32.h>
+#include <sys/list.h>
+#include <sys/dmu.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_znode.h>
+#include <sys/sa.h>
+#include <sys/zil.h>
+
+
+#endif
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * This is the list of known attributes
+ * to the ZPL.  The values of the actual
+ * attributes are not defined by the order
+ * the enums.  It is controlled by the attribute
+ * registration mechanism.  Two different file system
+ * could have different numeric values for the same
+ * attributes.  this list is only used for dereferencing
+ * into the table that will hold the actual numeric value.
+ */
+typedef enum zpl_attr {
+	ZPL_ATIME,
+	ZPL_MTIME,
+	ZPL_CTIME,
+	ZPL_CRTIME,
+	ZPL_GEN,
+	ZPL_MODE,
+	ZPL_SIZE,
+	ZPL_PARENT,
+	ZPL_LINKS,
+	ZPL_XATTR,
+	ZPL_RDEV,
+	ZPL_FLAGS,
+	ZPL_UID,
+	ZPL_GID,
+	ZPL_PAD,
+	ZPL_ZNODE_ACL,
+	ZPL_DACL_COUNT,
+	ZPL_SYMLINK,
+	ZPL_SCANSTAMP,
+	ZPL_DACL_ACES,
+	ZPL_END
+} zpl_attr_t;
+
+#define	ZFS_OLD_ZNODE_PHYS_SIZE	0x108
+#define	ZFS_SA_BASE_ATTR_SIZE	(ZFS_OLD_ZNODE_PHYS_SIZE - \
+    sizeof (zfs_acl_phys_t))
+
+#define	SA_MODE_OFFSET		0
+#define	SA_SIZE_OFFSET		8
+#define	SA_GEN_OFFSET		16
+#define	SA_UID_OFFSET		24
+#define	SA_GID_OFFSET		32
+#define	SA_PARENT_OFFSET	40
+
+extern sa_attr_reg_t zfs_attr_table[ZPL_END + 1];
+extern sa_attr_reg_t zfs_legacy_attr_table[ZPL_END + 1];
+
+/*
+ * This is a deprecated data structure that only exists for
+ * dealing with file systems create prior to ZPL version 5.
+ */
+typedef struct znode_phys {
+	uint64_t zp_atime[2];		/*  0 - last file access time */
+	uint64_t zp_mtime[2];		/* 16 - last file modification time */
+	uint64_t zp_ctime[2];		/* 32 - last file change time */
+	uint64_t zp_crtime[2];		/* 48 - creation time */
+	uint64_t zp_gen;		/* 64 - generation (txg of creation) */
+	uint64_t zp_mode;		/* 72 - file mode bits */
+	uint64_t zp_size;		/* 80 - size of file */
+	uint64_t zp_parent;		/* 88 - directory parent (`..') */
+	uint64_t zp_links;		/* 96 - number of links to file */
+	uint64_t zp_xattr;		/* 104 - DMU object for xattrs */
+	uint64_t zp_rdev;		/* 112 - dev_t for VBLK & VCHR files */
+	uint64_t zp_flags;		/* 120 - persistent flags */
+	uint64_t zp_uid;		/* 128 - file owner */
+	uint64_t zp_gid;		/* 136 - owning group */
+	uint64_t zp_zap;		/* 144 - extra attributes */
+	uint64_t zp_pad[3];		/* 152 - future */
+	zfs_acl_phys_t zp_acl;		/* 176 - 263 ACL */
+	/*
+	 * Data may pad out any remaining bytes in the znode buffer, eg:
+	 *
+	 * |<---------------------- dnode_phys (512) ------------------------>|
+	 * |<-- dnode (192) --->|<----------- "bonus" buffer (320) ---------->|
+	 *			|<---- znode (264) ---->|<---- data (56) ---->|
+	 *
+	 * At present, we use this space for the following:
+	 *  - symbolic links
+	 *  - 32-byte anti-virus scanstamp (regular files only)
+	 */
+} znode_phys_t;
+
+#ifdef _KERNEL
+int zfs_sa_readlink(struct znode *, uio_t *);
+void zfs_sa_symlink(struct znode *, char *link, int len, dmu_tx_t *);
+void zfs_sa_upgrade(struct sa_handle  *, dmu_tx_t *);
+void zfs_sa_get_scanstamp(struct znode *, xvattr_t *);
+void zfs_sa_set_scanstamp(struct znode *, xvattr_t *, dmu_tx_t *);
+void zfs_sa_uprade_pre(struct sa_handle *, void *, dmu_tx_t *);
+void zfs_sa_upgrade_post(struct sa_handle *, void *, dmu_tx_t *);
+void zfs_sa_upgrade_txholds(dmu_tx_t *, struct znode *);
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ZFS_SA_H */
diff --git a/uts/common/fs/zfs/sys/zfs_stat.h b/uts/common/fs/zfs/sys/zfs_stat.h
new file mode 100644
index 000000000000..465aefaa2063
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_stat.h
@@ -0,0 +1,56 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_FS_ZFS_STAT_H
+#define	_SYS_FS_ZFS_STAT_H
+
+#ifdef _KERNEL
+#include <sys/isa_defs.h>
+#include <sys/types32.h>
+#include <sys/dmu.h>
+#endif
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * A limited number of zpl level stats are retrievable
+ * with an ioctl.  zfs diff is the current consumer.
+ */
+typedef struct zfs_stat {
+	uint64_t	zs_gen;
+	uint64_t	zs_mode;
+	uint64_t	zs_links;
+	uint64_t	zs_ctime[2];
+} zfs_stat_t;
+
+extern int zfs_obj_to_stats(objset_t *osp, uint64_t obj, zfs_stat_t *sb,
+    char *buf, int len);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_FS_ZFS_STAT_H */
diff --git a/uts/common/fs/zfs/sys/zfs_vfsops.h b/uts/common/fs/zfs/sys/zfs_vfsops.h
new file mode 100644
index 000000000000..38c87df4300f
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_vfsops.h
@@ -0,0 +1,159 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_FS_ZFS_VFSOPS_H
+#define	_SYS_FS_ZFS_VFSOPS_H
+
+#include <sys/isa_defs.h>
+#include <sys/types32.h>
+#include <sys/list.h>
+#include <sys/vfs.h>
+#include <sys/zil.h>
+#include <sys/sa.h>
+#include <sys/rrwlock.h>
+#include <sys/zfs_ioctl.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct zfsvfs zfsvfs_t;
+struct znode;
+
+struct zfsvfs {
+	vfs_t		*z_vfs;		/* generic fs struct */
+	zfsvfs_t	*z_parent;	/* parent fs */
+	objset_t	*z_os;		/* objset reference */
+	uint64_t	z_root;		/* id of root znode */
+	uint64_t	z_unlinkedobj;	/* id of unlinked zapobj */
+	uint64_t	z_max_blksz;	/* maximum block size for files */
+	uint64_t	z_fuid_obj;	/* fuid table object number */
+	uint64_t	z_fuid_size;	/* fuid table size */
+	avl_tree_t	z_fuid_idx;	/* fuid tree keyed by index */
+	avl_tree_t	z_fuid_domain;	/* fuid tree keyed by domain */
+	krwlock_t	z_fuid_lock;	/* fuid lock */
+	boolean_t	z_fuid_loaded;	/* fuid tables are loaded */
+	boolean_t	z_fuid_dirty;   /* need to sync fuid table ? */
+	struct zfs_fuid_info	*z_fuid_replay; /* fuid info for replay */
+	zilog_t		*z_log;		/* intent log pointer */
+	uint_t		z_acl_inherit;	/* acl inheritance behavior */
+	zfs_case_t	z_case;		/* case-sense */
+	boolean_t	z_utf8;		/* utf8-only */
+	int		z_norm;		/* normalization flags */
+	boolean_t	z_atime;	/* enable atimes mount option */
+	boolean_t	z_unmounted;	/* unmounted */
+	rrwlock_t	z_teardown_lock;
+	krwlock_t	z_teardown_inactive_lock;
+	list_t		z_all_znodes;	/* all vnodes in the fs */
+	kmutex_t	z_znodes_lock;	/* lock for z_all_znodes */
+	vnode_t		*z_ctldir;	/* .zfs directory pointer */
+	boolean_t	z_show_ctldir;	/* expose .zfs in the root dir */
+	boolean_t	z_issnap;	/* true if this is a snapshot */
+	boolean_t	z_vscan;	/* virus scan on/off */
+	boolean_t	z_use_fuids;	/* version allows fuids */
+	boolean_t	z_replay;	/* set during ZIL replay */
+	boolean_t	z_use_sa;	/* version allow system attributes */
+	uint64_t	z_version;	/* ZPL version */
+	uint64_t	z_shares_dir;	/* hidden shares dir */
+	kmutex_t	z_lock;
+	uint64_t	z_userquota_obj;
+	uint64_t	z_groupquota_obj;
+	uint64_t	z_replay_eof;	/* New end of file - replay only */
+	sa_attr_type_t	*z_attr_table;	/* SA attr mapping->id */
+#define	ZFS_OBJ_MTX_SZ	64
+	kmutex_t	z_hold_mtx[ZFS_OBJ_MTX_SZ];	/* znode hold locks */
+};
+
+/*
+ * Normal filesystems (those not under .zfs/snapshot) have a total
+ * file ID size limited to 12 bytes (including the length field) due to
+ * NFSv2 protocol's limitation of 32 bytes for a filehandle.  For historical
+ * reasons, this same limit is being imposed by the Solaris NFSv3 implementation
+ * (although the NFSv3 protocol actually permits a maximum of 64 bytes).  It
+ * is not possible to expand beyond 12 bytes without abandoning support
+ * of NFSv2.
+ *
+ * For normal filesystems, we partition up the available space as follows:
+ *	2 bytes		fid length (required)
+ *	6 bytes		object number (48 bits)
+ *	4 bytes		generation number (32 bits)
+ *
+ * We reserve only 48 bits for the object number, as this is the limit
+ * currently defined and imposed by the DMU.
+ */
+typedef struct zfid_short {
+	uint16_t	zf_len;
+	uint8_t		zf_object[6];		/* obj[i] = obj >> (8 * i) */
+	uint8_t		zf_gen[4];		/* gen[i] = gen >> (8 * i) */
+} zfid_short_t;
+
+/*
+ * Filesystems under .zfs/snapshot have a total file ID size of 22 bytes
+ * (including the length field).  This makes files under .zfs/snapshot
+ * accessible by NFSv3 and NFSv4, but not NFSv2.
+ *
+ * For files under .zfs/snapshot, we partition up the available space
+ * as follows:
+ *	2 bytes		fid length (required)
+ *	6 bytes		object number (48 bits)
+ *	4 bytes		generation number (32 bits)
+ *	6 bytes		objset id (48 bits)
+ *	4 bytes		currently just zero (32 bits)
+ *
+ * We reserve only 48 bits for the object number and objset id, as these are
+ * the limits currently defined and imposed by the DMU.
+ */
+typedef struct zfid_long {
+	zfid_short_t	z_fid;
+	uint8_t		zf_setid[6];		/* obj[i] = obj >> (8 * i) */
+	uint8_t		zf_setgen[4];		/* gen[i] = gen >> (8 * i) */
+} zfid_long_t;
+
+#define	SHORT_FID_LEN	(sizeof (zfid_short_t) - sizeof (uint16_t))
+#define	LONG_FID_LEN	(sizeof (zfid_long_t) - sizeof (uint16_t))
+
+extern uint_t zfs_fsyncer_key;
+
+extern int zfs_suspend_fs(zfsvfs_t *zfsvfs);
+extern int zfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname);
+extern int zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
+    const char *domain, uint64_t rid, uint64_t *valuep);
+extern int zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
+    uint64_t *cookiep, void *vbuf, uint64_t *bufsizep);
+extern int zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
+    const char *domain, uint64_t rid, uint64_t quota);
+extern boolean_t zfs_owner_overquota(zfsvfs_t *zfsvfs, struct znode *,
+    boolean_t isgroup);
+extern boolean_t zfs_fuid_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup,
+    uint64_t fuid);
+extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers);
+extern int zfsvfs_create(const char *name, zfsvfs_t **zfvp);
+extern void zfsvfs_free(zfsvfs_t *zfsvfs);
+extern int zfs_check_global_label(const char *dsname, const char *hexsl);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_FS_ZFS_VFSOPS_H */
diff --git a/uts/common/fs/zfs/sys/zfs_znode.h b/uts/common/fs/zfs/sys/zfs_znode.h
new file mode 100644
index 000000000000..3e9621a0ee24
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zfs_znode.h
@@ -0,0 +1,361 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_FS_ZFS_ZNODE_H
+#define	_SYS_FS_ZFS_ZNODE_H
+
+#ifdef _KERNEL
+#include <sys/isa_defs.h>
+#include <sys/types32.h>
+#include <sys/attr.h>
+#include <sys/list.h>
+#include <sys/dmu.h>
+#include <sys/sa.h>
+#include <sys/zfs_vfsops.h>
+#include <sys/rrwlock.h>
+#include <sys/zfs_sa.h>
+#include <sys/zfs_stat.h>
+#endif
+#include <sys/zfs_acl.h>
+#include <sys/zil.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Additional file level attributes, that are stored
+ * in the upper half of zp_flags
+ */
+#define	ZFS_READONLY		0x0000000100000000
+#define	ZFS_HIDDEN		0x0000000200000000
+#define	ZFS_SYSTEM		0x0000000400000000
+#define	ZFS_ARCHIVE		0x0000000800000000
+#define	ZFS_IMMUTABLE		0x0000001000000000
+#define	ZFS_NOUNLINK		0x0000002000000000
+#define	ZFS_APPENDONLY		0x0000004000000000
+#define	ZFS_NODUMP		0x0000008000000000
+#define	ZFS_OPAQUE		0x0000010000000000
+#define	ZFS_AV_QUARANTINED 	0x0000020000000000
+#define	ZFS_AV_MODIFIED 	0x0000040000000000
+#define	ZFS_REPARSE		0x0000080000000000
+#define	ZFS_OFFLINE		0x0000100000000000
+#define	ZFS_SPARSE		0x0000200000000000
+
+#define	ZFS_ATTR_SET(zp, attr, value, pflags, tx) \
+{ \
+	if (value) \
+		pflags |= attr; \
+	else \
+		pflags &= ~attr; \
+	VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_FLAGS(zp->z_zfsvfs), \
+	    &pflags, sizeof (pflags), tx)); \
+}
+
+/*
+ * Define special zfs pflags
+ */
+#define	ZFS_XATTR		0x1		/* is an extended attribute */
+#define	ZFS_INHERIT_ACE		0x2		/* ace has inheritable ACEs */
+#define	ZFS_ACL_TRIVIAL 	0x4		/* files ACL is trivial */
+#define	ZFS_ACL_OBJ_ACE 	0x8		/* ACL has CMPLX Object ACE */
+#define	ZFS_ACL_PROTECTED	0x10		/* ACL protected */
+#define	ZFS_ACL_DEFAULTED	0x20		/* ACL should be defaulted */
+#define	ZFS_ACL_AUTO_INHERIT	0x40		/* ACL should be inherited */
+#define	ZFS_BONUS_SCANSTAMP	0x80		/* Scanstamp in bonus area */
+#define	ZFS_NO_EXECS_DENIED	0x100		/* exec was given to everyone */
+
+#define	SA_ZPL_ATIME(z)		z->z_attr_table[ZPL_ATIME]
+#define	SA_ZPL_MTIME(z)		z->z_attr_table[ZPL_MTIME]
+#define	SA_ZPL_CTIME(z)		z->z_attr_table[ZPL_CTIME]
+#define	SA_ZPL_CRTIME(z)	z->z_attr_table[ZPL_CRTIME]
+#define	SA_ZPL_GEN(z)		z->z_attr_table[ZPL_GEN]
+#define	SA_ZPL_DACL_ACES(z)	z->z_attr_table[ZPL_DACL_ACES]
+#define	SA_ZPL_XATTR(z)		z->z_attr_table[ZPL_XATTR]
+#define	SA_ZPL_SYMLINK(z)	z->z_attr_table[ZPL_SYMLINK]
+#define	SA_ZPL_RDEV(z)		z->z_attr_table[ZPL_RDEV]
+#define	SA_ZPL_SCANSTAMP(z)	z->z_attr_table[ZPL_SCANSTAMP]
+#define	SA_ZPL_UID(z)		z->z_attr_table[ZPL_UID]
+#define	SA_ZPL_GID(z)		z->z_attr_table[ZPL_GID]
+#define	SA_ZPL_PARENT(z)	z->z_attr_table[ZPL_PARENT]
+#define	SA_ZPL_LINKS(z)		z->z_attr_table[ZPL_LINKS]
+#define	SA_ZPL_MODE(z)		z->z_attr_table[ZPL_MODE]
+#define	SA_ZPL_DACL_COUNT(z)	z->z_attr_table[ZPL_DACL_COUNT]
+#define	SA_ZPL_FLAGS(z)		z->z_attr_table[ZPL_FLAGS]
+#define	SA_ZPL_SIZE(z)		z->z_attr_table[ZPL_SIZE]
+#define	SA_ZPL_ZNODE_ACL(z)	z->z_attr_table[ZPL_ZNODE_ACL]
+#define	SA_ZPL_PAD(z)		z->z_attr_table[ZPL_PAD]
+
+/*
+ * Is ID ephemeral?
+ */
+#define	IS_EPHEMERAL(x)		(x > MAXUID)
+
+/*
+ * Should we use FUIDs?
+ */
+#define	USE_FUIDS(version, os)	(version >= ZPL_VERSION_FUID && \
+    spa_version(dmu_objset_spa(os)) >= SPA_VERSION_FUID)
+#define	USE_SA(version, os) (version >= ZPL_VERSION_SA && \
+    spa_version(dmu_objset_spa(os)) >= SPA_VERSION_SA)
+
+#define	MASTER_NODE_OBJ	1
+
+/*
+ * Special attributes for master node.
+ * "userquota@" and "groupquota@" are also valid (from
+ * zfs_userquota_prop_prefixes[]).
+ */
+#define	ZFS_FSID		"FSID"
+#define	ZFS_UNLINKED_SET	"DELETE_QUEUE"
+#define	ZFS_ROOT_OBJ		"ROOT"
+#define	ZPL_VERSION_STR		"VERSION"
+#define	ZFS_FUID_TABLES		"FUID"
+#define	ZFS_SHARES_DIR		"SHARES"
+#define	ZFS_SA_ATTRS		"SA_ATTRS"
+
+#define	ZFS_MAX_BLOCKSIZE	(SPA_MAXBLOCKSIZE)
+
+/* Path component length */
+/*
+ * The generic fs code uses MAXNAMELEN to represent
+ * what the largest component length is.  Unfortunately,
+ * this length includes the terminating NULL.  ZFS needs
+ * to tell the users via pathconf() and statvfs() what the
+ * true maximum length of a component is, excluding the NULL.
+ */
+#define	ZFS_MAXNAMELEN	(MAXNAMELEN - 1)
+
+/*
+ * Convert mode bits (zp_mode) to BSD-style DT_* values for storing in
+ * the directory entries.
+ */
+#define	IFTODT(mode) (((mode) & S_IFMT) >> 12)
+
+/*
+ * The directory entry has the type (currently unused on Solaris) in the
+ * top 4 bits, and the object number in the low 48 bits.  The "middle"
+ * 12 bits are unused.
+ */
+#define	ZFS_DIRENT_TYPE(de) BF64_GET(de, 60, 4)
+#define	ZFS_DIRENT_OBJ(de) BF64_GET(de, 0, 48)
+
+/*
+ * Directory entry locks control access to directory entries.
+ * They are used to protect creates, deletes, and renames.
+ * Each directory znode has a mutex and a list of locked names.
+ */
+#ifdef _KERNEL
+typedef struct zfs_dirlock {
+	char		*dl_name;	/* directory entry being locked */
+	uint32_t	dl_sharecnt;	/* 0 if exclusive, > 0 if shared */
+	uint8_t		dl_namelock;	/* 1 if z_name_lock is NOT held */
+	uint16_t	dl_namesize;	/* set if dl_name was allocated */
+	kcondvar_t	dl_cv;		/* wait for entry to be unlocked */
+	struct znode	*dl_dzp;	/* directory znode */
+	struct zfs_dirlock *dl_next;	/* next in z_dirlocks list */
+} zfs_dirlock_t;
+
+typedef struct znode {
+	struct zfsvfs	*z_zfsvfs;
+	vnode_t		*z_vnode;
+	uint64_t	z_id;		/* object ID for this znode */
+	kmutex_t	z_lock;		/* znode modification lock */
+	krwlock_t	z_parent_lock;	/* parent lock for directories */
+	krwlock_t	z_name_lock;	/* "master" lock for dirent locks */
+	zfs_dirlock_t	*z_dirlocks;	/* directory entry lock list */
+	kmutex_t	z_range_lock;	/* protects changes to z_range_avl */
+	avl_tree_t	z_range_avl;	/* avl tree of file range locks */
+	uint8_t		z_unlinked;	/* file has been unlinked */
+	uint8_t		z_atime_dirty;	/* atime needs to be synced */
+	uint8_t		z_zn_prefetch;	/* Prefetch znodes? */
+	uint8_t		z_moved;	/* Has this znode been moved? */
+	uint_t		z_blksz;	/* block size in bytes */
+	uint_t		z_seq;		/* modification sequence number */
+	uint64_t	z_mapcnt;	/* number of pages mapped to file */
+	uint64_t	z_gen;		/* generation (cached) */
+	uint64_t	z_size;		/* file size (cached) */
+	uint64_t	z_atime[2];	/* atime (cached) */
+	uint64_t	z_links;	/* file links (cached) */
+	uint64_t	z_pflags;	/* pflags (cached) */
+	uint64_t	z_uid;		/* uid fuid (cached) */
+	uint64_t	z_gid;		/* gid fuid (cached) */
+	mode_t		z_mode;		/* mode (cached) */
+	uint32_t	z_sync_cnt;	/* synchronous open count */
+	kmutex_t	z_acl_lock;	/* acl data lock */
+	zfs_acl_t	*z_acl_cached;	/* cached acl */
+	list_node_t	z_link_node;	/* all znodes in fs link */
+	sa_handle_t	*z_sa_hdl;	/* handle to sa data */
+	boolean_t	z_is_sa;	/* are we native sa? */
+} znode_t;
+
+
+/*
+ * Range locking rules
+ * --------------------
+ * 1. When truncating a file (zfs_create, zfs_setattr, zfs_space) the whole
+ *    file range needs to be locked as RL_WRITER. Only then can the pages be
+ *    freed etc and zp_size reset. zp_size must be set within range lock.
+ * 2. For writes and punching holes (zfs_write & zfs_space) just the range
+ *    being written or freed needs to be locked as RL_WRITER.
+ *    Multiple writes at the end of the file must coordinate zp_size updates
+ *    to ensure data isn't lost. A compare and swap loop is currently used
+ *    to ensure the file size is at least the offset last written.
+ * 3. For reads (zfs_read, zfs_get_data & zfs_putapage) just the range being
+ *    read needs to be locked as RL_READER. A check against zp_size can then
+ *    be made for reading beyond end of file.
+ */
+
+/*
+ * Convert between znode pointers and vnode pointers
+ */
+#define	ZTOV(ZP)	((ZP)->z_vnode)
+#define	VTOZ(VP)	((znode_t *)(VP)->v_data)
+
+/*
+ * ZFS_ENTER() is called on entry to each ZFS vnode and vfs operation.
+ * ZFS_EXIT() must be called before exitting the vop.
+ * ZFS_VERIFY_ZP() verifies the znode is valid.
+ */
+#define	ZFS_ENTER(zfsvfs) \
+	{ \
+		rrw_enter(&(zfsvfs)->z_teardown_lock, RW_READER, FTAG); \
+		if ((zfsvfs)->z_unmounted) { \
+			ZFS_EXIT(zfsvfs); \
+			return (EIO); \
+		} \
+	}
+
+#define	ZFS_EXIT(zfsvfs) rrw_exit(&(zfsvfs)->z_teardown_lock, FTAG)
+
+#define	ZFS_VERIFY_ZP(zp) \
+	if ((zp)->z_sa_hdl == NULL) { \
+		ZFS_EXIT((zp)->z_zfsvfs); \
+		return (EIO); \
+	} \
+
+/*
+ * Macros for dealing with dmu_buf_hold
+ */
+#define	ZFS_OBJ_HASH(obj_num)	((obj_num) & (ZFS_OBJ_MTX_SZ - 1))
+#define	ZFS_OBJ_MUTEX(zfsvfs, obj_num)	\
+	(&(zfsvfs)->z_hold_mtx[ZFS_OBJ_HASH(obj_num)])
+#define	ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num) \
+	mutex_enter(ZFS_OBJ_MUTEX((zfsvfs), (obj_num)))
+#define	ZFS_OBJ_HOLD_TRYENTER(zfsvfs, obj_num) \
+	mutex_tryenter(ZFS_OBJ_MUTEX((zfsvfs), (obj_num)))
+#define	ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num) \
+	mutex_exit(ZFS_OBJ_MUTEX((zfsvfs), (obj_num)))
+
+/*
+ * Macros to encode/decode ZFS stored time values from/to struct timespec
+ */
+#define	ZFS_TIME_ENCODE(tp, stmp)		\
+{						\
+	(stmp)[0] = (uint64_t)(tp)->tv_sec;	\
+	(stmp)[1] = (uint64_t)(tp)->tv_nsec;	\
+}
+
+#define	ZFS_TIME_DECODE(tp, stmp)		\
+{						\
+	(tp)->tv_sec = (time_t)(stmp)[0];		\
+	(tp)->tv_nsec = (long)(stmp)[1];		\
+}
+
+/*
+ * Timestamp defines
+ */
+#define	ACCESSED		(AT_ATIME)
+#define	STATE_CHANGED		(AT_CTIME)
+#define	CONTENT_MODIFIED	(AT_MTIME | AT_CTIME)
+
+#define	ZFS_ACCESSTIME_STAMP(zfsvfs, zp) \
+	if ((zfsvfs)->z_atime && !((zfsvfs)->z_vfs->vfs_flag & VFS_RDONLY)) \
+		zfs_tstamp_update_setup(zp, ACCESSED, NULL, NULL, B_FALSE);
+
+extern int	zfs_init_fs(zfsvfs_t *, znode_t **);
+extern void	zfs_set_dataprop(objset_t *);
+extern void	zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *,
+    dmu_tx_t *tx);
+extern void	zfs_tstamp_update_setup(znode_t *, uint_t, uint64_t [2],
+    uint64_t [2], boolean_t);
+extern void	zfs_grow_blocksize(znode_t *, uint64_t, dmu_tx_t *);
+extern int	zfs_freesp(znode_t *, uint64_t, uint64_t, int, boolean_t);
+extern void	zfs_znode_init(void);
+extern void	zfs_znode_fini(void);
+extern int	zfs_zget(zfsvfs_t *, uint64_t, znode_t **);
+extern int	zfs_rezget(znode_t *);
+extern void	zfs_zinactive(znode_t *);
+extern void	zfs_znode_delete(znode_t *, dmu_tx_t *);
+extern void	zfs_znode_free(znode_t *);
+extern void	zfs_remove_op_tables();
+extern int	zfs_create_op_tables();
+extern int	zfs_sync(vfs_t *vfsp, short flag, cred_t *cr);
+extern dev_t	zfs_cmpldev(uint64_t);
+extern int	zfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value);
+extern int	zfs_get_stats(objset_t *os, nvlist_t *nv);
+extern void	zfs_znode_dmu_fini(znode_t *);
+
+extern void zfs_log_create(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
+    znode_t *dzp, znode_t *zp, char *name, vsecattr_t *, zfs_fuid_info_t *,
+    vattr_t *vap);
+extern int zfs_log_create_txtype(zil_create_t, vsecattr_t *vsecp,
+    vattr_t *vap);
+extern void zfs_log_remove(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
+    znode_t *dzp, char *name, uint64_t foid);
+#define	ZFS_NO_OBJECT	0	/* no object id */
+extern void zfs_log_link(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
+    znode_t *dzp, znode_t *zp, char *name);
+extern void zfs_log_symlink(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
+    znode_t *dzp, znode_t *zp, char *name, char *link);
+extern void zfs_log_rename(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
+    znode_t *sdzp, char *sname, znode_t *tdzp, char *dname, znode_t *szp);
+extern void zfs_log_write(zilog_t *zilog, dmu_tx_t *tx, int txtype,
+    znode_t *zp, offset_t off, ssize_t len, int ioflag);
+extern void zfs_log_truncate(zilog_t *zilog, dmu_tx_t *tx, int txtype,
+    znode_t *zp, uint64_t off, uint64_t len);
+extern void zfs_log_setattr(zilog_t *zilog, dmu_tx_t *tx, int txtype,
+    znode_t *zp, vattr_t *vap, uint_t mask_applied, zfs_fuid_info_t *fuidp);
+extern void zfs_log_acl(zilog_t *zilog, dmu_tx_t *tx, znode_t *zp,
+    vsecattr_t *vsecp, zfs_fuid_info_t *fuidp);
+extern void zfs_xvattr_set(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx);
+extern void zfs_upgrade(zfsvfs_t *zfsvfs, dmu_tx_t *tx);
+extern int zfs_create_share_dir(zfsvfs_t *zfsvfs, dmu_tx_t *tx);
+
+extern caddr_t zfs_map_page(page_t *, enum seg_rw);
+extern void zfs_unmap_page(page_t *, caddr_t);
+
+extern zil_get_data_t zfs_get_data;
+extern zil_replay_func_t *zfs_replay_vector[TX_MAX_TYPE];
+extern int zfsfstype;
+
+#endif /* _KERNEL */
+
+extern int zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_FS_ZFS_ZNODE_H */
diff --git a/uts/common/fs/zfs/sys/zil.h b/uts/common/fs/zfs/sys/zil.h
new file mode 100644
index 000000000000..a4c5575b2dba
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zil.h
@@ -0,0 +1,428 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2010 Robert Milkowski */
+
+#ifndef	_SYS_ZIL_H
+#define	_SYS_ZIL_H
+
+#include <sys/types.h>
+#include <sys/spa.h>
+#include <sys/zio.h>
+#include <sys/dmu.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Intent log format:
+ *
+ * Each objset has its own intent log.  The log header (zil_header_t)
+ * for objset N's intent log is kept in the Nth object of the SPA's
+ * intent_log objset.  The log header points to a chain of log blocks,
+ * each of which contains log records (i.e., transactions) followed by
+ * a log block trailer (zil_trailer_t).  The format of a log record
+ * depends on the record (or transaction) type, but all records begin
+ * with a common structure that defines the type, length, and txg.
+ */
+
+/*
+ * Intent log header - this on disk structure holds fields to manage
+ * the log.  All fields are 64 bit to easily handle cross architectures.
+ */
+typedef struct zil_header {
+	uint64_t zh_claim_txg;	/* txg in which log blocks were claimed */
+	uint64_t zh_replay_seq;	/* highest replayed sequence number */
+	blkptr_t zh_log;	/* log chain */
+	uint64_t zh_claim_blk_seq; /* highest claimed block sequence number */
+	uint64_t zh_flags;	/* header flags */
+	uint64_t zh_claim_lr_seq; /* highest claimed lr sequence number */
+	uint64_t zh_pad[3];
+} zil_header_t;
+
+/*
+ * zh_flags bit settings
+ */
+#define	ZIL_REPLAY_NEEDED	0x1	/* replay needed - internal only */
+#define	ZIL_CLAIM_LR_SEQ_VALID	0x2	/* zh_claim_lr_seq field is valid */
+
+/*
+ * Log block chaining.
+ *
+ * Log blocks are chained together. Originally they were chained at the
+ * end of the block. For performance reasons the chain was moved to the
+ * beginning of the block which allows writes for only the data being used.
+ * The older position is supported for backwards compatability.
+ *
+ * The zio_eck_t contains a zec_cksum which for the intent log is
+ * the sequence number of this log block. A seq of 0 is invalid.
+ * The zec_cksum is checked by the SPA against the sequence
+ * number passed in the blk_cksum field of the blkptr_t
+ */
+typedef struct zil_chain {
+	uint64_t zc_pad;
+	blkptr_t zc_next_blk;	/* next block in chain */
+	uint64_t zc_nused;	/* bytes in log block used */
+	zio_eck_t zc_eck;	/* block trailer */
+} zil_chain_t;
+
+#define	ZIL_MIN_BLKSZ	4096ULL
+#define	ZIL_MAX_BLKSZ	SPA_MAXBLOCKSIZE
+
+/*
+ * The words of a log block checksum.
+ */
+#define	ZIL_ZC_GUID_0	0
+#define	ZIL_ZC_GUID_1	1
+#define	ZIL_ZC_OBJSET	2
+#define	ZIL_ZC_SEQ	3
+
+typedef enum zil_create {
+	Z_FILE,
+	Z_DIR,
+	Z_XATTRDIR,
+} zil_create_t;
+
+/*
+ * size of xvattr log section.
+ * its composed of lr_attr_t + xvattr bitmap + 2 64 bit timestamps
+ * for create time and a single 64 bit integer for all of the attributes,
+ * and 4 64 bit integers (32 bytes) for the scanstamp.
+ *
+ */
+
+#define	ZIL_XVAT_SIZE(mapsize) \
+	sizeof (lr_attr_t) + (sizeof (uint32_t) * (mapsize - 1)) + \
+	(sizeof (uint64_t) * 7)
+
+/*
+ * Size of ACL in log.  The ACE data is padded out to properly align
+ * on 8 byte boundary.
+ */
+
+#define	ZIL_ACE_LENGTH(x)	(roundup(x, sizeof (uint64_t)))
+
+/*
+ * Intent log transaction types and record structures
+ */
+#define	TX_CREATE		1	/* Create file */
+#define	TX_MKDIR		2	/* Make directory */
+#define	TX_MKXATTR		3	/* Make XATTR directory */
+#define	TX_SYMLINK		4	/* Create symbolic link to a file */
+#define	TX_REMOVE		5	/* Remove file */
+#define	TX_RMDIR		6	/* Remove directory */
+#define	TX_LINK			7	/* Create hard link to a file */
+#define	TX_RENAME		8	/* Rename a file */
+#define	TX_WRITE		9	/* File write */
+#define	TX_TRUNCATE		10	/* Truncate a file */
+#define	TX_SETATTR		11	/* Set file attributes */
+#define	TX_ACL_V0		12	/* Set old formatted ACL */
+#define	TX_ACL			13	/* Set ACL */
+#define	TX_CREATE_ACL		14	/* create with ACL */
+#define	TX_CREATE_ATTR		15	/* create + attrs */
+#define	TX_CREATE_ACL_ATTR 	16	/* create with ACL + attrs */
+#define	TX_MKDIR_ACL		17	/* mkdir with ACL */
+#define	TX_MKDIR_ATTR		18	/* mkdir with attr */
+#define	TX_MKDIR_ACL_ATTR	19	/* mkdir with ACL + attrs */
+#define	TX_WRITE2		20	/* dmu_sync EALREADY write */
+#define	TX_MAX_TYPE		21	/* Max transaction type */
+
+/*
+ * The transactions for mkdir, symlink, remove, rmdir, link, and rename
+ * may have the following bit set, indicating the original request
+ * specified case-insensitive handling of names.
+ */
+#define	TX_CI	((uint64_t)0x1 << 63) /* case-insensitive behavior requested */
+
+/*
+ * Transactions for write, truncate, setattr, acl_v0, and acl can be logged
+ * out of order.  For convenience in the code, all such records must have
+ * lr_foid at the same offset.
+ */
+#define	TX_OOO(txtype)			\
+	((txtype) == TX_WRITE ||	\
+	(txtype) == TX_TRUNCATE ||	\
+	(txtype) == TX_SETATTR ||	\
+	(txtype) == TX_ACL_V0 ||	\
+	(txtype) == TX_ACL ||		\
+	(txtype) == TX_WRITE2)
+
+/*
+ * Format of log records.
+ * The fields are carefully defined to allow them to be aligned
+ * and sized the same on sparc & intel architectures.
+ * Each log record has a common structure at the beginning.
+ *
+ * The log record on disk (lrc_seq) holds the sequence number of all log
+ * records which is used to ensure we don't replay the same record.
+ */
+typedef struct {			/* common log record header */
+	uint64_t	lrc_txtype;	/* intent log transaction type */
+	uint64_t	lrc_reclen;	/* transaction record length */
+	uint64_t	lrc_txg;	/* dmu transaction group number */
+	uint64_t	lrc_seq;	/* see comment above */
+} lr_t;
+
+/*
+ * Common start of all out-of-order record types (TX_OOO() above).
+ */
+typedef struct {
+	lr_t		lr_common;	/* common portion of log record */
+	uint64_t	lr_foid;	/* object id */
+} lr_ooo_t;
+
+/*
+ * Handle option extended vattr attributes.
+ *
+ * Whenever new attributes are added the version number
+ * will need to be updated as will code in
+ * zfs_log.c and zfs_replay.c
+ */
+typedef struct {
+	uint32_t	lr_attr_masksize; /* number of elements in array */
+	uint32_t	lr_attr_bitmap; /* First entry of array */
+	/* remainder of array and any additional fields */
+} lr_attr_t;
+
+/*
+ * log record for creates without optional ACL.
+ * This log record does support optional xvattr_t attributes.
+ */
+typedef struct {
+	lr_t		lr_common;	/* common portion of log record */
+	uint64_t	lr_doid;	/* object id of directory */
+	uint64_t	lr_foid;	/* object id of created file object */
+	uint64_t	lr_mode;	/* mode of object */
+	uint64_t	lr_uid;		/* uid of object */
+	uint64_t	lr_gid;		/* gid of object */
+	uint64_t	lr_gen;		/* generation (txg of creation) */
+	uint64_t	lr_crtime[2];	/* creation time */
+	uint64_t	lr_rdev;	/* rdev of object to create */
+	/* name of object to create follows this */
+	/* for symlinks, link content follows name */
+	/* for creates with xvattr data, the name follows the xvattr info */
+} lr_create_t;
+
+/*
+ * FUID ACL record will be an array of ACEs from the original ACL.
+ * If this array includes ephemeral IDs, the record will also include
+ * an array of log-specific FUIDs to replace the ephemeral IDs.
+ * Only one copy of each unique domain will be present, so the log-specific
+ * FUIDs will use an index into a compressed domain table.  On replay this
+ * information will be used to construct real FUIDs (and bypass idmap,
+ * since it may not be available).
+ */
+
+/*
+ * Log record for creates with optional ACL
+ * This log record is also used for recording any FUID
+ * information needed for replaying the create.  If the
+ * file doesn't have any actual ACEs then the lr_aclcnt
+ * would be zero.
+ */
+typedef struct {
+	lr_create_t	lr_create;	/* common create portion */
+	uint64_t	lr_aclcnt;	/* number of ACEs in ACL */
+	uint64_t	lr_domcnt;	/* number of unique domains */
+	uint64_t	lr_fuidcnt;	/* number of real fuids */
+	uint64_t	lr_acl_bytes;	/* number of bytes in ACL */
+	uint64_t	lr_acl_flags;	/* ACL flags */
+	/* lr_acl_bytes number of variable sized ace's follows */
+	/* if create is also setting xvattr's, then acl data follows xvattr */
+	/* if ACE FUIDs are needed then they will follow the xvattr_t */
+	/* Following the FUIDs will be the domain table information. */
+	/* The FUIDs for the owner and group will be in the lr_create */
+	/* portion of the record. */
+	/* name follows ACL data */
+} lr_acl_create_t;
+
+typedef struct {
+	lr_t		lr_common;	/* common portion of log record */
+	uint64_t	lr_doid;	/* obj id of directory */
+	/* name of object to remove follows this */
+} lr_remove_t;
+
+typedef struct {
+	lr_t		lr_common;	/* common portion of log record */
+	uint64_t	lr_doid;	/* obj id of directory */
+	uint64_t	lr_link_obj;	/* obj id of link */
+	/* name of object to link follows this */
+} lr_link_t;
+
+typedef struct {
+	lr_t		lr_common;	/* common portion of log record */
+	uint64_t	lr_sdoid;	/* obj id of source directory */
+	uint64_t	lr_tdoid;	/* obj id of target directory */
+	/* 2 strings: names of source and destination follow this */
+} lr_rename_t;
+
+typedef struct {
+	lr_t		lr_common;	/* common portion of log record */
+	uint64_t	lr_foid;	/* file object to write */
+	uint64_t	lr_offset;	/* offset to write to */
+	uint64_t	lr_length;	/* user data length to write */
+	uint64_t	lr_blkoff;	/* no longer used */
+	blkptr_t	lr_blkptr;	/* spa block pointer for replay */
+	/* write data will follow for small writes */
+} lr_write_t;
+
+typedef struct {
+	lr_t		lr_common;	/* common portion of log record */
+	uint64_t	lr_foid;	/* object id of file to truncate */
+	uint64_t	lr_offset;	/* offset to truncate from */
+	uint64_t	lr_length;	/* length to truncate */
+} lr_truncate_t;
+
+typedef struct {
+	lr_t		lr_common;	/* common portion of log record */
+	uint64_t	lr_foid;	/* file object to change attributes */
+	uint64_t	lr_mask;	/* mask of attributes to set */
+	uint64_t	lr_mode;	/* mode to set */
+	uint64_t	lr_uid;		/* uid to set */
+	uint64_t	lr_gid;		/* gid to set */
+	uint64_t	lr_size;	/* size to set */
+	uint64_t	lr_atime[2];	/* access time */
+	uint64_t	lr_mtime[2];	/* modification time */
+	/* optional attribute lr_attr_t may be here */
+} lr_setattr_t;
+
+typedef struct {
+	lr_t		lr_common;	/* common portion of log record */
+	uint64_t	lr_foid;	/* obj id of file */
+	uint64_t	lr_aclcnt;	/* number of acl entries */
+	/* lr_aclcnt number of ace_t entries follow this */
+} lr_acl_v0_t;
+
+typedef struct {
+	lr_t		lr_common;	/* common portion of log record */
+	uint64_t	lr_foid;	/* obj id of file */
+	uint64_t	lr_aclcnt;	/* number of ACEs in ACL */
+	uint64_t	lr_domcnt;	/* number of unique domains */
+	uint64_t	lr_fuidcnt;	/* number of real fuids */
+	uint64_t	lr_acl_bytes;	/* number of bytes in ACL */
+	uint64_t	lr_acl_flags;	/* ACL flags */
+	/* lr_acl_bytes number of variable sized ace's follows */
+} lr_acl_t;
+
+/*
+ * ZIL structure definitions, interface function prototype and globals.
+ */
+
+/*
+ * Writes are handled in three different ways:
+ *
+ * WR_INDIRECT:
+ *    In this mode, if we need to commit the write later, then the block
+ *    is immediately written into the file system (using dmu_sync),
+ *    and a pointer to the block is put into the log record.
+ *    When the txg commits the block is linked in.
+ *    This saves additionally writing the data into the log record.
+ *    There are a few requirements for this to occur:
+ *	- write is greater than zfs/zvol_immediate_write_sz
+ *	- not using slogs (as slogs are assumed to always be faster
+ *	  than writing into the main pool)
+ *	- the write occupies only one block
+ * WR_COPIED:
+ *    If we know we'll immediately be committing the
+ *    transaction (FSYNC or FDSYNC), the we allocate a larger
+ *    log record here for the data and copy the data in.
+ * WR_NEED_COPY:
+ *    Otherwise we don't allocate a buffer, and *if* we need to
+ *    flush the write later then a buffer is allocated and
+ *    we retrieve the data using the dmu.
+ */
+typedef enum {
+	WR_INDIRECT,	/* indirect - a large write (dmu_sync() data */
+			/* and put blkptr in log, rather than actual data) */
+	WR_COPIED,	/* immediate - data is copied into lr_write_t */
+	WR_NEED_COPY,	/* immediate - data needs to be copied if pushed */
+	WR_NUM_STATES	/* number of states */
+} itx_wr_state_t;
+
+typedef struct itx {
+	list_node_t	itx_node;	/* linkage on zl_itx_list */
+	void		*itx_private;	/* type-specific opaque data */
+	itx_wr_state_t	itx_wr_state;	/* write state */
+	uint8_t		itx_sync;	/* synchronous transaction */
+	uint64_t	itx_sod;	/* record size on disk */
+	uint64_t	itx_oid;	/* object id */
+	lr_t		itx_lr;		/* common part of log record */
+	/* followed by type-specific part of lr_xx_t and its immediate data */
+} itx_t;
+
+typedef int zil_parse_blk_func_t(zilog_t *zilog, blkptr_t *bp, void *arg,
+    uint64_t txg);
+typedef int zil_parse_lr_func_t(zilog_t *zilog, lr_t *lr, void *arg,
+    uint64_t txg);
+typedef int zil_replay_func_t();
+typedef int zil_get_data_t(void *arg, lr_write_t *lr, char *dbuf, zio_t *zio);
+
+extern int zil_parse(zilog_t *zilog, zil_parse_blk_func_t *parse_blk_func,
+    zil_parse_lr_func_t *parse_lr_func, void *arg, uint64_t txg);
+
+extern void	zil_init(void);
+extern void	zil_fini(void);
+
+extern zilog_t	*zil_alloc(objset_t *os, zil_header_t *zh_phys);
+extern void	zil_free(zilog_t *zilog);
+
+extern zilog_t	*zil_open(objset_t *os, zil_get_data_t *get_data);
+extern void	zil_close(zilog_t *zilog);
+
+extern void	zil_replay(objset_t *os, void *arg,
+    zil_replay_func_t *replay_func[TX_MAX_TYPE]);
+extern boolean_t zil_replaying(zilog_t *zilog, dmu_tx_t *tx);
+extern void	zil_destroy(zilog_t *zilog, boolean_t keep_first);
+extern void	zil_rollback_destroy(zilog_t *zilog, dmu_tx_t *tx);
+
+extern itx_t	*zil_itx_create(uint64_t txtype, size_t lrsize);
+extern void	zil_itx_destroy(itx_t *itx);
+extern void	zil_itx_assign(zilog_t *zilog, itx_t *itx, dmu_tx_t *tx);
+
+extern void	zil_commit(zilog_t *zilog, uint64_t oid);
+
+extern int	zil_vdev_offline(const char *osname, void *txarg);
+extern int	zil_claim(const char *osname, void *txarg);
+extern int	zil_check_log_chain(const char *osname, void *txarg);
+extern void	zil_sync(zilog_t *zilog, dmu_tx_t *tx);
+extern void	zil_clean(zilog_t *zilog, uint64_t synced_txg);
+
+extern int	zil_suspend(zilog_t *zilog);
+extern void	zil_resume(zilog_t *zilog);
+
+extern void	zil_add_block(zilog_t *zilog, const blkptr_t *bp);
+extern int	zil_bp_tree_add(zilog_t *zilog, const blkptr_t *bp);
+
+extern void	zil_set_sync(zilog_t *zilog, uint64_t syncval);
+
+extern void	zil_set_logbias(zilog_t *zilog, uint64_t slogval);
+
+extern int zil_replay_disable;
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ZIL_H */
diff --git a/uts/common/fs/zfs/sys/zil_impl.h b/uts/common/fs/zfs/sys/zil_impl.h
new file mode 100644
index 000000000000..1d4c0cc6c1de
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zil_impl.h
@@ -0,0 +1,147 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2010 Robert Milkowski */
+
+#ifndef	_SYS_ZIL_IMPL_H
+#define	_SYS_ZIL_IMPL_H
+
+#include <sys/zil.h>
+#include <sys/dmu_objset.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Log write buffer.
+ */
+typedef struct lwb {
+	zilog_t		*lwb_zilog;	/* back pointer to log struct */
+	blkptr_t	lwb_blk;	/* on disk address of this log blk */
+	int		lwb_nused;	/* # used bytes in buffer */
+	int		lwb_sz;		/* size of block and buffer */
+	char		*lwb_buf;	/* log write buffer */
+	zio_t		*lwb_zio;	/* zio for this buffer */
+	dmu_tx_t	*lwb_tx;	/* tx for log block allocation */
+	uint64_t	lwb_max_txg;	/* highest txg in this lwb */
+	list_node_t	lwb_node;	/* zilog->zl_lwb_list linkage */
+} lwb_t;
+
+/*
+ * Intent log transaction lists
+ */
+typedef struct itxs {
+	list_t		i_sync_list;	/* list of synchronous itxs */
+	avl_tree_t	i_async_tree;	/* tree of foids for async itxs */
+} itxs_t;
+
+typedef struct itxg {
+	kmutex_t	itxg_lock;	/* lock for this structure */
+	uint64_t	itxg_txg;	/* txg for this chain */
+	uint64_t	itxg_sod;	/* total size on disk for this txg */
+	itxs_t		*itxg_itxs;	/* sync and async itxs */
+} itxg_t;
+
+/* for async nodes we build up an AVL tree of lists of async itxs per file */
+typedef struct itx_async_node {
+	uint64_t	ia_foid;	/* file object id */
+	list_t		ia_list;	/* list of async itxs for this foid */
+	avl_node_t	ia_node;	/* AVL tree linkage */
+} itx_async_node_t;
+
+/*
+ * Vdev flushing: during a zil_commit(), we build up an AVL tree of the vdevs
+ * we've touched so we know which ones need a write cache flush at the end.
+ */
+typedef struct zil_vdev_node {
+	uint64_t	zv_vdev;	/* vdev to be flushed */
+	avl_node_t	zv_node;	/* AVL tree linkage */
+} zil_vdev_node_t;
+
+#define	ZIL_PREV_BLKS 16
+
+/*
+ * Stable storage intent log management structure.  One per dataset.
+ */
+struct zilog {
+	kmutex_t	zl_lock;	/* protects most zilog_t fields */
+	struct dsl_pool	*zl_dmu_pool;	/* DSL pool */
+	spa_t		*zl_spa;	/* handle for read/write log */
+	const zil_header_t *zl_header;	/* log header buffer */
+	objset_t	*zl_os;		/* object set we're logging */
+	zil_get_data_t	*zl_get_data;	/* callback to get object content */
+	zio_t		*zl_root_zio;	/* log writer root zio */
+	uint64_t	zl_lr_seq;	/* on-disk log record sequence number */
+	uint64_t	zl_commit_lr_seq; /* last committed on-disk lr seq */
+	uint64_t	zl_destroy_txg;	/* txg of last zil_destroy() */
+	uint64_t	zl_replayed_seq[TXG_SIZE]; /* last replayed rec seq */
+	uint64_t	zl_replaying_seq; /* current replay seq number */
+	uint32_t	zl_suspend;	/* log suspend count */
+	kcondvar_t	zl_cv_writer;	/* log writer thread completion */
+	kcondvar_t	zl_cv_suspend;	/* log suspend completion */
+	uint8_t		zl_suspending;	/* log is currently suspending */
+	uint8_t		zl_keep_first;	/* keep first log block in destroy */
+	uint8_t		zl_replay;	/* replaying records while set */
+	uint8_t		zl_stop_sync;	/* for debugging */
+	uint8_t		zl_writer;	/* boolean: write setup in progress */
+	uint8_t		zl_logbias;	/* latency or throughput */
+	uint8_t		zl_sync;	/* synchronous or asynchronous */
+	int		zl_parse_error;	/* last zil_parse() error */
+	uint64_t	zl_parse_blk_seq; /* highest blk seq on last parse */
+	uint64_t	zl_parse_lr_seq; /* highest lr seq on last parse */
+	uint64_t	zl_parse_blk_count; /* number of blocks parsed */
+	uint64_t	zl_parse_lr_count; /* number of log records parsed */
+	uint64_t	zl_next_batch;	/* next batch number */
+	uint64_t	zl_com_batch;	/* committed batch number */
+	kcondvar_t	zl_cv_batch[2];	/* batch condition variables */
+	itxg_t		zl_itxg[TXG_SIZE]; /* intent log txg chains */
+	list_t		zl_itx_commit_list; /* itx list to be committed */
+	uint64_t	zl_itx_list_sz;	/* total size of records on list */
+	uint64_t	zl_cur_used;	/* current commit log size used */
+	list_t		zl_lwb_list;	/* in-flight log write list */
+	kmutex_t	zl_vdev_lock;	/* protects zl_vdev_tree */
+	avl_tree_t	zl_vdev_tree;	/* vdevs to flush in zil_commit() */
+	taskq_t		*zl_clean_taskq; /* runs lwb and itx clean tasks */
+	avl_tree_t	zl_bp_tree;	/* track bps during log parse */
+	clock_t		zl_replay_time;	/* lbolt of when replay started */
+	uint64_t	zl_replay_blks;	/* number of log blocks replayed */
+	zil_header_t	zl_old_header;	/* debugging aid */
+	uint_t		zl_prev_blks[ZIL_PREV_BLKS]; /* size - sector rounded */
+	uint_t		zl_prev_rotor;	/* rotor for zl_prev[] */
+};
+
+typedef struct zil_bp_node {
+	dva_t		zn_dva;
+	avl_node_t	zn_node;
+} zil_bp_node_t;
+
+#define	ZIL_MAX_LOG_DATA (SPA_MAXBLOCKSIZE - sizeof (zil_chain_t) - \
+    sizeof (lr_write_t))
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ZIL_IMPL_H */
diff --git a/uts/common/fs/zfs/sys/zio.h b/uts/common/fs/zfs/sys/zio.h
new file mode 100644
index 000000000000..97d8ec74d2e9
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zio.h
@@ -0,0 +1,559 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _ZIO_H
+#define	_ZIO_H
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/avl.h>
+#include <sys/fs/zfs.h>
+#include <sys/zio_impl.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Embedded checksum
+ */
+#define	ZEC_MAGIC	0x210da7ab10c7a11ULL
+
+typedef struct zio_eck {
+	uint64_t	zec_magic;	/* for validation, endianness	*/
+	zio_cksum_t	zec_cksum;	/* 256-bit checksum		*/
+} zio_eck_t;
+
+/*
+ * Gang block headers are self-checksumming and contain an array
+ * of block pointers.
+ */
+#define	SPA_GANGBLOCKSIZE	SPA_MINBLOCKSIZE
+#define	SPA_GBH_NBLKPTRS	((SPA_GANGBLOCKSIZE - \
+	sizeof (zio_eck_t)) / sizeof (blkptr_t))
+#define	SPA_GBH_FILLER		((SPA_GANGBLOCKSIZE - \
+	sizeof (zio_eck_t) - \
+	(SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\
+	sizeof (uint64_t))
+
+typedef struct zio_gbh {
+	blkptr_t		zg_blkptr[SPA_GBH_NBLKPTRS];
+	uint64_t		zg_filler[SPA_GBH_FILLER];
+	zio_eck_t		zg_tail;
+} zio_gbh_phys_t;
+
+enum zio_checksum {
+	ZIO_CHECKSUM_INHERIT = 0,
+	ZIO_CHECKSUM_ON,
+	ZIO_CHECKSUM_OFF,
+	ZIO_CHECKSUM_LABEL,
+	ZIO_CHECKSUM_GANG_HEADER,
+	ZIO_CHECKSUM_ZILOG,
+	ZIO_CHECKSUM_FLETCHER_2,
+	ZIO_CHECKSUM_FLETCHER_4,
+	ZIO_CHECKSUM_SHA256,
+	ZIO_CHECKSUM_ZILOG2,
+	ZIO_CHECKSUM_FUNCTIONS
+};
+
+#define	ZIO_CHECKSUM_ON_VALUE	ZIO_CHECKSUM_FLETCHER_4
+#define	ZIO_CHECKSUM_DEFAULT	ZIO_CHECKSUM_ON
+
+#define	ZIO_CHECKSUM_MASK	0xffULL
+#define	ZIO_CHECKSUM_VERIFY	(1 << 8)
+
+#define	ZIO_DEDUPCHECKSUM	ZIO_CHECKSUM_SHA256
+#define	ZIO_DEDUPDITTO_MIN	100
+
+enum zio_compress {
+	ZIO_COMPRESS_INHERIT = 0,
+	ZIO_COMPRESS_ON,
+	ZIO_COMPRESS_OFF,
+	ZIO_COMPRESS_LZJB,
+	ZIO_COMPRESS_EMPTY,
+	ZIO_COMPRESS_GZIP_1,
+	ZIO_COMPRESS_GZIP_2,
+	ZIO_COMPRESS_GZIP_3,
+	ZIO_COMPRESS_GZIP_4,
+	ZIO_COMPRESS_GZIP_5,
+	ZIO_COMPRESS_GZIP_6,
+	ZIO_COMPRESS_GZIP_7,
+	ZIO_COMPRESS_GZIP_8,
+	ZIO_COMPRESS_GZIP_9,
+	ZIO_COMPRESS_ZLE,
+	ZIO_COMPRESS_FUNCTIONS
+};
+
+#define	ZIO_COMPRESS_ON_VALUE	ZIO_COMPRESS_LZJB
+#define	ZIO_COMPRESS_DEFAULT	ZIO_COMPRESS_OFF
+
+#define	BOOTFS_COMPRESS_VALID(compress)			\
+	((compress) == ZIO_COMPRESS_LZJB ||		\
+	((compress) == ZIO_COMPRESS_ON &&		\
+	ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) ||	\
+	(compress) == ZIO_COMPRESS_OFF)
+
+#define	ZIO_FAILURE_MODE_WAIT		0
+#define	ZIO_FAILURE_MODE_CONTINUE	1
+#define	ZIO_FAILURE_MODE_PANIC		2
+
+#define	ZIO_PRIORITY_NOW		(zio_priority_table[0])
+#define	ZIO_PRIORITY_SYNC_READ		(zio_priority_table[1])
+#define	ZIO_PRIORITY_SYNC_WRITE		(zio_priority_table[2])
+#define	ZIO_PRIORITY_LOG_WRITE		(zio_priority_table[3])
+#define	ZIO_PRIORITY_CACHE_FILL		(zio_priority_table[4])
+#define	ZIO_PRIORITY_AGG		(zio_priority_table[5])
+#define	ZIO_PRIORITY_FREE		(zio_priority_table[6])
+#define	ZIO_PRIORITY_ASYNC_WRITE	(zio_priority_table[7])
+#define	ZIO_PRIORITY_ASYNC_READ		(zio_priority_table[8])
+#define	ZIO_PRIORITY_RESILVER		(zio_priority_table[9])
+#define	ZIO_PRIORITY_SCRUB		(zio_priority_table[10])
+#define	ZIO_PRIORITY_DDT_PREFETCH	(zio_priority_table[11])
+#define	ZIO_PRIORITY_TABLE_SIZE		12
+
+#define	ZIO_PIPELINE_CONTINUE		0x100
+#define	ZIO_PIPELINE_STOP		0x101
+
+enum zio_flag {
+	/*
+	 * Flags inherited by gang, ddt, and vdev children,
+	 * and that must be equal for two zios to aggregate
+	 */
+	ZIO_FLAG_DONT_AGGREGATE	= 1 << 0,
+	ZIO_FLAG_IO_REPAIR	= 1 << 1,
+	ZIO_FLAG_SELF_HEAL	= 1 << 2,
+	ZIO_FLAG_RESILVER	= 1 << 3,
+	ZIO_FLAG_SCRUB		= 1 << 4,
+	ZIO_FLAG_SCAN_THREAD	= 1 << 5,
+
+#define	ZIO_FLAG_AGG_INHERIT	(ZIO_FLAG_CANFAIL - 1)
+
+	/*
+	 * Flags inherited by ddt, gang, and vdev children.
+	 */
+	ZIO_FLAG_CANFAIL	= 1 << 6,	/* must be first for INHERIT */
+	ZIO_FLAG_SPECULATIVE	= 1 << 7,
+	ZIO_FLAG_CONFIG_WRITER	= 1 << 8,
+	ZIO_FLAG_DONT_RETRY	= 1 << 9,
+	ZIO_FLAG_DONT_CACHE	= 1 << 10,
+	ZIO_FLAG_NODATA		= 1 << 11,
+	ZIO_FLAG_INDUCE_DAMAGE	= 1 << 12,
+
+#define	ZIO_FLAG_DDT_INHERIT	(ZIO_FLAG_IO_RETRY - 1)
+#define	ZIO_FLAG_GANG_INHERIT	(ZIO_FLAG_IO_RETRY - 1)
+
+	/*
+	 * Flags inherited by vdev children.
+	 */
+	ZIO_FLAG_IO_RETRY	= 1 << 13,	/* must be first for INHERIT */
+	ZIO_FLAG_PROBE		= 1 << 14,
+	ZIO_FLAG_TRYHARD	= 1 << 15,
+	ZIO_FLAG_OPTIONAL	= 1 << 16,
+
+#define	ZIO_FLAG_VDEV_INHERIT	(ZIO_FLAG_DONT_QUEUE - 1)
+
+	/*
+	 * Flags not inherited by any children.
+	 */
+	ZIO_FLAG_DONT_QUEUE	= 1 << 17,	/* must be first for INHERIT */
+	ZIO_FLAG_DONT_PROPAGATE	= 1 << 18,
+	ZIO_FLAG_IO_BYPASS	= 1 << 19,
+	ZIO_FLAG_IO_REWRITE	= 1 << 20,
+	ZIO_FLAG_RAW		= 1 << 21,
+	ZIO_FLAG_GANG_CHILD	= 1 << 22,
+	ZIO_FLAG_DDT_CHILD	= 1 << 23,
+	ZIO_FLAG_GODFATHER	= 1 << 24
+};
+
+#define	ZIO_FLAG_MUSTSUCCEED		0
+
+#define	ZIO_DDT_CHILD_FLAGS(zio)				\
+	(((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) |		\
+	ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL)
+
+#define	ZIO_GANG_CHILD_FLAGS(zio)				\
+	(((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) |		\
+	ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL)
+
+#define	ZIO_VDEV_CHILD_FLAGS(zio)				\
+	(((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) |		\
+	ZIO_FLAG_CANFAIL)
+
+enum zio_child {
+	ZIO_CHILD_VDEV = 0,
+	ZIO_CHILD_GANG,
+	ZIO_CHILD_DDT,
+	ZIO_CHILD_LOGICAL,
+	ZIO_CHILD_TYPES
+};
+
+enum zio_wait_type {
+	ZIO_WAIT_READY = 0,
+	ZIO_WAIT_DONE,
+	ZIO_WAIT_TYPES
+};
+
+/*
+ * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent
+ * graveyard) to indicate checksum errors and fragmentation.
+ */
+#define	ECKSUM	EBADE
+#define	EFRAGS	EBADR
+
+typedef void zio_done_func_t(zio_t *zio);
+
+extern uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE];
+extern char *zio_type_name[ZIO_TYPES];
+
+/*
+ * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely
+ * identifies any block in the pool.  By convention, the meta-objset (MOS)
+ * is objset 0, and the meta-dnode is object 0.  This covers all blocks
+ * except root blocks and ZIL blocks, which are defined as follows:
+ *
+ * Root blocks (objset_phys_t) are object 0, level -1:  <objset, 0, -1, 0>.
+ * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>.
+ * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>.
+ *
+ * Note: this structure is called a bookmark because its original purpose
+ * was to remember where to resume a pool-wide traverse.
+ *
+ * Note: this structure is passed between userland and the kernel.
+ * Therefore it must not change size or alignment between 32/64 bit
+ * compilation options.
+ */
+typedef struct zbookmark {
+	uint64_t	zb_objset;
+	uint64_t	zb_object;
+	int64_t		zb_level;
+	uint64_t	zb_blkid;
+} zbookmark_t;
+
+#define	SET_BOOKMARK(zb, objset, object, level, blkid)  \
+{                                                       \
+	(zb)->zb_objset = objset;                       \
+	(zb)->zb_object = object;                       \
+	(zb)->zb_level = level;                         \
+	(zb)->zb_blkid = blkid;                         \
+}
+
+#define	ZB_DESTROYED_OBJSET	(-1ULL)
+
+#define	ZB_ROOT_OBJECT		(0ULL)
+#define	ZB_ROOT_LEVEL		(-1LL)
+#define	ZB_ROOT_BLKID		(0ULL)
+
+#define	ZB_ZIL_OBJECT		(0ULL)
+#define	ZB_ZIL_LEVEL		(-2LL)
+
+typedef struct zio_prop {
+	enum zio_checksum	zp_checksum;
+	enum zio_compress	zp_compress;
+	dmu_object_type_t	zp_type;
+	uint8_t			zp_level;
+	uint8_t			zp_copies;
+	uint8_t			zp_dedup;
+	uint8_t			zp_dedup_verify;
+} zio_prop_t;
+
+typedef struct zio_cksum_report zio_cksum_report_t;
+
+typedef void zio_cksum_finish_f(zio_cksum_report_t *rep,
+    const void *good_data);
+typedef void zio_cksum_free_f(void *cbdata, size_t size);
+
+struct zio_bad_cksum;				/* defined in zio_checksum.h */
+
+struct zio_cksum_report {
+	struct zio_cksum_report *zcr_next;
+	nvlist_t		*zcr_ereport;
+	nvlist_t		*zcr_detector;
+	void			*zcr_cbdata;
+	size_t			zcr_cbinfo;	/* passed to zcr_free() */
+	uint64_t		zcr_align;
+	uint64_t		zcr_length;
+	zio_cksum_finish_f	*zcr_finish;
+	zio_cksum_free_f	*zcr_free;
+
+	/* internal use only */
+	struct zio_bad_cksum	*zcr_ckinfo;	/* information from failure */
+};
+
+typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr,
+    void *arg);
+
+zio_vsd_cksum_report_f	zio_vsd_default_cksum_report;
+
+typedef struct zio_vsd_ops {
+	zio_done_func_t		*vsd_free;
+	zio_vsd_cksum_report_f	*vsd_cksum_report;
+} zio_vsd_ops_t;
+
+typedef struct zio_gang_node {
+	zio_gbh_phys_t		*gn_gbh;
+	struct zio_gang_node	*gn_child[SPA_GBH_NBLKPTRS];
+} zio_gang_node_t;
+
+typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp,
+    zio_gang_node_t *gn, void *data);
+
+typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size);
+
+typedef struct zio_transform {
+	void			*zt_orig_data;
+	uint64_t		zt_orig_size;
+	uint64_t		zt_bufsize;
+	zio_transform_func_t	*zt_transform;
+	struct zio_transform	*zt_next;
+} zio_transform_t;
+
+typedef int zio_pipe_stage_t(zio_t *zio);
+
+/*
+ * The io_reexecute flags are distinct from io_flags because the child must
+ * be able to propagate them to the parent.  The normal io_flags are local
+ * to the zio, not protected by any lock, and not modifiable by children;
+ * the reexecute flags are protected by io_lock, modifiable by children,
+ * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set.
+ */
+#define	ZIO_REEXECUTE_NOW	0x01
+#define	ZIO_REEXECUTE_SUSPEND	0x02
+
+typedef struct zio_link {
+	zio_t		*zl_parent;
+	zio_t		*zl_child;
+	list_node_t	zl_parent_node;
+	list_node_t	zl_child_node;
+} zio_link_t;
+
+struct zio {
+	/* Core information about this I/O */
+	zbookmark_t	io_bookmark;
+	zio_prop_t	io_prop;
+	zio_type_t	io_type;
+	enum zio_child	io_child_type;
+	int		io_cmd;
+	uint8_t		io_priority;
+	uint8_t		io_reexecute;
+	uint8_t		io_state[ZIO_WAIT_TYPES];
+	uint64_t	io_txg;
+	spa_t		*io_spa;
+	blkptr_t	*io_bp;
+	blkptr_t	*io_bp_override;
+	blkptr_t	io_bp_copy;
+	list_t		io_parent_list;
+	list_t		io_child_list;
+	zio_link_t	*io_walk_link;
+	zio_t		*io_logical;
+	zio_transform_t *io_transform_stack;
+
+	/* Callback info */
+	zio_done_func_t	*io_ready;
+	zio_done_func_t	*io_done;
+	void		*io_private;
+	int64_t		io_prev_space_delta;	/* DMU private */
+	blkptr_t	io_bp_orig;
+
+	/* Data represented by this I/O */
+	void		*io_data;
+	void		*io_orig_data;
+	uint64_t	io_size;
+	uint64_t	io_orig_size;
+
+	/* Stuff for the vdev stack */
+	vdev_t		*io_vd;
+	void		*io_vsd;
+	const zio_vsd_ops_t *io_vsd_ops;
+
+	uint64_t	io_offset;
+	uint64_t	io_deadline;
+	avl_node_t	io_offset_node;
+	avl_node_t	io_deadline_node;
+	avl_tree_t	*io_vdev_tree;
+
+	/* Internal pipeline state */
+	enum zio_flag	io_flags;
+	enum zio_stage	io_stage;
+	enum zio_stage	io_pipeline;
+	enum zio_flag	io_orig_flags;
+	enum zio_stage	io_orig_stage;
+	enum zio_stage	io_orig_pipeline;
+	int		io_error;
+	int		io_child_error[ZIO_CHILD_TYPES];
+	uint64_t	io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES];
+	uint64_t	io_child_count;
+	uint64_t	io_parent_count;
+	uint64_t	*io_stall;
+	zio_t		*io_gang_leader;
+	zio_gang_node_t	*io_gang_tree;
+	void		*io_executor;
+	void		*io_waiter;
+	kmutex_t	io_lock;
+	kcondvar_t	io_cv;
+
+	/* FMA state */
+	zio_cksum_report_t *io_cksum_report;
+	uint64_t	io_ena;
+};
+
+extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,
+    zio_done_func_t *done, void *private, enum zio_flag flags);
+
+extern zio_t *zio_root(spa_t *spa,
+    zio_done_func_t *done, void *private, enum zio_flag flags);
+
+extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data,
+    uint64_t size, zio_done_func_t *done, void *private,
+    int priority, enum zio_flag flags, const zbookmark_t *zb);
+
+extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
+    void *data, uint64_t size, const zio_prop_t *zp,
+    zio_done_func_t *ready, zio_done_func_t *done, void *private,
+    int priority, enum zio_flag flags, const zbookmark_t *zb);
+
+extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
+    void *data, uint64_t size, zio_done_func_t *done, void *private,
+    int priority, enum zio_flag flags, zbookmark_t *zb);
+
+extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies);
+
+extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp);
+
+extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg,
+    const blkptr_t *bp,
+    zio_done_func_t *done, void *private, enum zio_flag flags);
+
+extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
+    zio_done_func_t *done, void *private, int priority, enum zio_flag flags);
+
+extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
+    uint64_t size, void *data, int checksum,
+    zio_done_func_t *done, void *private, int priority, enum zio_flag flags,
+    boolean_t labels);
+
+extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
+    uint64_t size, void *data, int checksum,
+    zio_done_func_t *done, void *private, int priority, enum zio_flag flags,
+    boolean_t labels);
+
+extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg,
+    const blkptr_t *bp, enum zio_flag flags);
+
+extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp,
+    blkptr_t *old_bp, uint64_t size, boolean_t use_slog);
+extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp);
+extern void zio_flush(zio_t *zio, vdev_t *vd);
+extern void zio_shrink(zio_t *zio, uint64_t size);
+
+extern int zio_wait(zio_t *zio);
+extern void zio_nowait(zio_t *zio);
+extern void zio_execute(zio_t *zio);
+extern void zio_interrupt(zio_t *zio);
+
+extern zio_t *zio_walk_parents(zio_t *cio);
+extern zio_t *zio_walk_children(zio_t *pio);
+extern zio_t *zio_unique_parent(zio_t *cio);
+extern void zio_add_child(zio_t *pio, zio_t *cio);
+
+extern void *zio_buf_alloc(size_t size);
+extern void zio_buf_free(void *buf, size_t size);
+extern void *zio_data_buf_alloc(size_t size);
+extern void zio_data_buf_free(void *buf, size_t size);
+
+extern void zio_resubmit_stage_async(void *);
+
+extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd,
+    uint64_t offset, void *data, uint64_t size, int type, int priority,
+    enum zio_flag flags, zio_done_func_t *done, void *private);
+
+extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset,
+    void *data, uint64_t size, int type, int priority,
+    enum zio_flag flags, zio_done_func_t *done, void *private);
+
+extern void zio_vdev_io_bypass(zio_t *zio);
+extern void zio_vdev_io_reissue(zio_t *zio);
+extern void zio_vdev_io_redone(zio_t *zio);
+
+extern void zio_checksum_verified(zio_t *zio);
+extern int zio_worst_error(int e1, int e2);
+
+extern enum zio_checksum zio_checksum_select(enum zio_checksum child,
+    enum zio_checksum parent);
+extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa,
+    enum zio_checksum child, enum zio_checksum parent);
+extern enum zio_compress zio_compress_select(enum zio_compress child,
+    enum zio_compress parent);
+
+extern void zio_suspend(spa_t *spa, zio_t *zio);
+extern int zio_resume(spa_t *spa);
+extern void zio_resume_wait(spa_t *spa);
+
+/*
+ * Initial setup and teardown.
+ */
+extern void zio_init(void);
+extern void zio_fini(void);
+
+/*
+ * Fault injection
+ */
+struct zinject_record;
+extern uint32_t zio_injection_enabled;
+extern int zio_inject_fault(char *name, int flags, int *id,
+    struct zinject_record *record);
+extern int zio_inject_list_next(int *id, char *name, size_t buflen,
+    struct zinject_record *record);
+extern int zio_clear_fault(int id);
+extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type);
+extern int zio_handle_fault_injection(zio_t *zio, int error);
+extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error);
+extern int zio_handle_label_injection(zio_t *zio, int error);
+extern void zio_handle_ignored_writes(zio_t *zio);
+
+/*
+ * Checksum ereport functions
+ */
+extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio,
+    uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info);
+extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report,
+    const void *good_data, const void *bad_data, boolean_t drop_if_identical);
+
+extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report);
+extern void zfs_ereport_free_checksum(zio_cksum_report_t *report);
+
+/* If we have the good data in hand, this function can be used */
+extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
+    struct zio *zio, uint64_t offset, uint64_t length,
+    const void *good_data, const void *bad_data, struct zio_bad_cksum *info);
+
+/* Called from spa_sync(), but primarily an injection handler */
+extern void spa_handle_ignored_writes(spa_t *spa);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _ZIO_H */
diff --git a/uts/common/fs/zfs/sys/zio_checksum.h b/uts/common/fs/zfs/sys/zio_checksum.h
new file mode 100644
index 000000000000..0956c04ab1b4
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zio_checksum.h
@@ -0,0 +1,75 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_ZIO_CHECKSUM_H
+#define	_SYS_ZIO_CHECKSUM_H
+
+#include <sys/zio.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Signature for checksum functions.
+ */
+typedef void zio_checksum_t(const void *data, uint64_t size, zio_cksum_t *zcp);
+
+/*
+ * Information about each checksum function.
+ */
+typedef struct zio_checksum_info {
+	zio_checksum_t	*ci_func[2]; /* checksum function for each byteorder */
+	int		ci_correctable;	/* number of correctable bits	*/
+	int		ci_eck;		/* uses zio embedded checksum? */
+	int		ci_dedup;	/* strong enough for dedup? */
+	char		*ci_name;	/* descriptive name */
+} zio_checksum_info_t;
+
+typedef struct zio_bad_cksum {
+	zio_cksum_t		zbc_expected;
+	zio_cksum_t		zbc_actual;
+	const char		*zbc_checksum_name;
+	uint8_t			zbc_byteswapped;
+	uint8_t			zbc_injected;
+	uint8_t			zbc_has_cksum;	/* expected/actual valid */
+} zio_bad_cksum_t;
+
+extern zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS];
+
+/*
+ * Checksum routines.
+ */
+extern zio_checksum_t zio_checksum_SHA256;
+
+extern void zio_checksum_compute(zio_t *zio, enum zio_checksum checksum,
+    void *data, uint64_t size);
+extern int zio_checksum_error(zio_t *zio, zio_bad_cksum_t *out);
+extern enum zio_checksum spa_dedup_checksum(spa_t *spa);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ZIO_CHECKSUM_H */
diff --git a/uts/common/fs/zfs/sys/zio_compress.h b/uts/common/fs/zfs/sys/zio_compress.h
new file mode 100644
index 000000000000..30bed1a676e3
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zio_compress.h
@@ -0,0 +1,84 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_ZIO_COMPRESS_H
+#define	_SYS_ZIO_COMPRESS_H
+
+#include <sys/zio.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Common signature for all zio compress/decompress functions.
+ */
+typedef size_t zio_compress_func_t(void *src, void *dst,
+    size_t s_len, size_t d_len, int);
+typedef int zio_decompress_func_t(void *src, void *dst,
+    size_t s_len, size_t d_len, int);
+
+/*
+ * Information about each compression function.
+ */
+typedef struct zio_compress_info {
+	zio_compress_func_t	*ci_compress;	/* compression function */
+	zio_decompress_func_t	*ci_decompress;	/* decompression function */
+	int			ci_level;	/* level parameter */
+	char			*ci_name;	/* algorithm name */
+} zio_compress_info_t;
+
+extern zio_compress_info_t zio_compress_table[ZIO_COMPRESS_FUNCTIONS];
+
+/*
+ * Compression routines.
+ */
+extern size_t lzjb_compress(void *src, void *dst, size_t s_len, size_t d_len,
+    int level);
+extern int lzjb_decompress(void *src, void *dst, size_t s_len, size_t d_len,
+    int level);
+extern size_t gzip_compress(void *src, void *dst, size_t s_len, size_t d_len,
+    int level);
+extern int gzip_decompress(void *src, void *dst, size_t s_len, size_t d_len,
+    int level);
+extern size_t zle_compress(void *src, void *dst, size_t s_len, size_t d_len,
+    int level);
+extern int zle_decompress(void *src, void *dst, size_t s_len, size_t d_len,
+    int level);
+
+/*
+ * Compress and decompress data if necessary.
+ */
+extern size_t zio_compress_data(enum zio_compress c, void *src, void *dst,
+    size_t s_len);
+extern int zio_decompress_data(enum zio_compress c, void *src, void *dst,
+    size_t s_len, size_t d_len);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ZIO_COMPRESS_H */
diff --git a/uts/common/fs/zfs/sys/zio_impl.h b/uts/common/fs/zfs/sys/zio_impl.h
new file mode 100644
index 000000000000..d90bd8bd5921
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zio_impl.h
@@ -0,0 +1,175 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _ZIO_IMPL_H
+#define	_ZIO_IMPL_H
+
+#include <sys/zfs_context.h>
+#include <sys/zio.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * zio pipeline stage definitions
+ */
+enum zio_stage {
+	ZIO_STAGE_OPEN			= 1 << 0,	/* RWFCI */
+
+	ZIO_STAGE_READ_BP_INIT		= 1 << 1,	/* R---- */
+	ZIO_STAGE_FREE_BP_INIT		= 1 << 2,	/* --F-- */
+	ZIO_STAGE_ISSUE_ASYNC		= 1 << 3,	/* RWF-- */
+	ZIO_STAGE_WRITE_BP_INIT		= 1 << 4,	/* -W--- */
+
+	ZIO_STAGE_CHECKSUM_GENERATE	= 1 << 5,	/* -W--- */
+
+	ZIO_STAGE_DDT_READ_START	= 1 << 6,	/* R---- */
+	ZIO_STAGE_DDT_READ_DONE		= 1 << 7,	/* R---- */
+	ZIO_STAGE_DDT_WRITE		= 1 << 8,	/* -W--- */
+	ZIO_STAGE_DDT_FREE		= 1 << 9,	/* --F-- */
+
+	ZIO_STAGE_GANG_ASSEMBLE		= 1 << 10,	/* RWFC- */
+	ZIO_STAGE_GANG_ISSUE		= 1 << 11,	/* RWFC- */
+
+	ZIO_STAGE_DVA_ALLOCATE		= 1 << 12,	/* -W--- */
+	ZIO_STAGE_DVA_FREE		= 1 << 13,	/* --F-- */
+	ZIO_STAGE_DVA_CLAIM		= 1 << 14,	/* ---C- */
+
+	ZIO_STAGE_READY			= 1 << 15,	/* RWFCI */
+
+	ZIO_STAGE_VDEV_IO_START		= 1 << 16,	/* RW--I */
+	ZIO_STAGE_VDEV_IO_DONE		= 1 << 17,	/* RW--I */
+	ZIO_STAGE_VDEV_IO_ASSESS	= 1 << 18,	/* RW--I */
+
+	ZIO_STAGE_CHECKSUM_VERIFY	= 1 << 19,	/* R---- */
+
+	ZIO_STAGE_DONE			= 1 << 20	/* RWFCI */
+};
+
+#define	ZIO_INTERLOCK_STAGES			\
+	(ZIO_STAGE_READY |			\
+	ZIO_STAGE_DONE)
+
+#define	ZIO_INTERLOCK_PIPELINE			\
+	ZIO_INTERLOCK_STAGES
+
+#define	ZIO_VDEV_IO_STAGES			\
+	(ZIO_STAGE_VDEV_IO_START |		\
+	ZIO_STAGE_VDEV_IO_DONE |		\
+	ZIO_STAGE_VDEV_IO_ASSESS)
+
+#define	ZIO_VDEV_CHILD_PIPELINE			\
+	(ZIO_VDEV_IO_STAGES |			\
+	ZIO_STAGE_DONE)
+
+#define	ZIO_READ_COMMON_STAGES			\
+	(ZIO_INTERLOCK_STAGES |			\
+	ZIO_VDEV_IO_STAGES |			\
+	ZIO_STAGE_CHECKSUM_VERIFY)
+
+#define	ZIO_READ_PHYS_PIPELINE			\
+	ZIO_READ_COMMON_STAGES
+
+#define	ZIO_READ_PIPELINE			\
+	(ZIO_READ_COMMON_STAGES |		\
+	ZIO_STAGE_READ_BP_INIT)
+
+#define	ZIO_DDT_CHILD_READ_PIPELINE		\
+	ZIO_READ_COMMON_STAGES
+
+#define	ZIO_DDT_READ_PIPELINE			\
+	(ZIO_INTERLOCK_STAGES |			\
+	ZIO_STAGE_READ_BP_INIT |		\
+	ZIO_STAGE_DDT_READ_START |		\
+	ZIO_STAGE_DDT_READ_DONE)
+
+#define	ZIO_WRITE_COMMON_STAGES			\
+	(ZIO_INTERLOCK_STAGES |			\
+	ZIO_VDEV_IO_STAGES |			\
+	ZIO_STAGE_ISSUE_ASYNC |			\
+	ZIO_STAGE_CHECKSUM_GENERATE)
+
+#define	ZIO_WRITE_PHYS_PIPELINE			\
+	ZIO_WRITE_COMMON_STAGES
+
+#define	ZIO_REWRITE_PIPELINE			\
+	(ZIO_WRITE_COMMON_STAGES |		\
+	ZIO_STAGE_WRITE_BP_INIT)
+
+#define	ZIO_WRITE_PIPELINE			\
+	(ZIO_WRITE_COMMON_STAGES |		\
+	ZIO_STAGE_WRITE_BP_INIT |		\
+	ZIO_STAGE_DVA_ALLOCATE)
+
+#define	ZIO_DDT_CHILD_WRITE_PIPELINE		\
+	(ZIO_INTERLOCK_STAGES |			\
+	ZIO_VDEV_IO_STAGES |			\
+	ZIO_STAGE_DVA_ALLOCATE)
+
+#define	ZIO_DDT_WRITE_PIPELINE			\
+	(ZIO_INTERLOCK_STAGES |			\
+	ZIO_STAGE_ISSUE_ASYNC |			\
+	ZIO_STAGE_WRITE_BP_INIT |		\
+	ZIO_STAGE_CHECKSUM_GENERATE |		\
+	ZIO_STAGE_DDT_WRITE)
+
+#define	ZIO_GANG_STAGES				\
+	(ZIO_STAGE_GANG_ASSEMBLE |		\
+	ZIO_STAGE_GANG_ISSUE)
+
+#define	ZIO_FREE_PIPELINE			\
+	(ZIO_INTERLOCK_STAGES |			\
+	ZIO_STAGE_FREE_BP_INIT |		\
+	ZIO_STAGE_DVA_FREE)
+
+#define	ZIO_DDT_FREE_PIPELINE			\
+	(ZIO_INTERLOCK_STAGES |			\
+	ZIO_STAGE_FREE_BP_INIT |		\
+	ZIO_STAGE_ISSUE_ASYNC |			\
+	ZIO_STAGE_DDT_FREE)
+
+#define	ZIO_CLAIM_PIPELINE			\
+	(ZIO_INTERLOCK_STAGES |			\
+	ZIO_STAGE_DVA_CLAIM)
+
+#define	ZIO_IOCTL_PIPELINE			\
+	(ZIO_INTERLOCK_STAGES |			\
+	ZIO_STAGE_VDEV_IO_START |		\
+	ZIO_STAGE_VDEV_IO_ASSESS)
+
+#define	ZIO_BLOCKING_STAGES			\
+	(ZIO_STAGE_DVA_ALLOCATE |		\
+	ZIO_STAGE_DVA_CLAIM |			\
+	ZIO_STAGE_VDEV_IO_START)
+
+extern void zio_inject_init(void);
+extern void zio_inject_fini(void);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _ZIO_IMPL_H */
diff --git a/uts/common/fs/zfs/sys/zrlock.h b/uts/common/fs/zfs/sys/zrlock.h
new file mode 100644
index 000000000000..dcd63f7b5b91
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zrlock.h
@@ -0,0 +1,66 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_ZRLOCK_H
+#define	_SYS_ZRLOCK_H
+
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct zrlock {
+	kmutex_t zr_mtx;
+	volatile int32_t zr_refcount;
+	kcondvar_t zr_cv;
+	uint16_t zr_pad;
+#ifdef	ZFS_DEBUG
+	kthread_t *zr_owner;
+	const char *zr_caller;
+#endif
+} zrlock_t;
+
+extern void zrl_init(zrlock_t *);
+extern void zrl_destroy(zrlock_t *);
+#ifdef	ZFS_DEBUG
+#define	zrl_add(_z)	zrl_add_debug((_z), __func__)
+extern void zrl_add_debug(zrlock_t *, const char *);
+#else
+extern void zrl_add(zrlock_t *);
+#endif
+extern void zrl_remove(zrlock_t *);
+extern int zrl_tryenter(zrlock_t *);
+extern void zrl_exit(zrlock_t *);
+extern int zrl_is_zero(zrlock_t *);
+extern int zrl_is_locked(zrlock_t *);
+#ifdef	ZFS_DEBUG
+extern kthread_t *zrl_owner(zrlock_t *);
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_ZRLOCK_H */
diff --git a/uts/common/fs/zfs/sys/zvol.h b/uts/common/fs/zfs/sys/zvol.h
new file mode 100644
index 000000000000..0059bf510260
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zvol.h
@@ -0,0 +1,76 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_ZVOL_H
+#define	_SYS_ZVOL_H
+
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#define	ZVOL_OBJ		1ULL
+#define	ZVOL_ZAP_OBJ		2ULL
+
+#ifdef _KERNEL
+extern int zvol_check_volsize(uint64_t volsize, uint64_t blocksize);
+extern int zvol_check_volblocksize(uint64_t volblocksize);
+extern int zvol_get_stats(objset_t *os, nvlist_t *nv);
+extern void zvol_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
+extern int zvol_create_minor(const char *);
+extern int zvol_remove_minor(const char *);
+extern void zvol_remove_minors(const char *);
+extern int zvol_set_volsize(const char *, major_t, uint64_t);
+
+extern int zvol_open(dev_t *devp, int flag, int otyp, cred_t *cr);
+extern int zvol_dump(dev_t dev, caddr_t addr, daddr_t offset, int nblocks);
+extern int zvol_close(dev_t dev, int flag, int otyp, cred_t *cr);
+extern int zvol_strategy(buf_t *bp);
+extern int zvol_read(dev_t dev, uio_t *uiop, cred_t *cr);
+extern int zvol_write(dev_t dev, uio_t *uiop, cred_t *cr);
+extern int zvol_aread(dev_t dev, struct aio_req *aio, cred_t *cr);
+extern int zvol_awrite(dev_t dev, struct aio_req *aio, cred_t *cr);
+extern int zvol_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr,
+    int *rvalp);
+extern int zvol_busy(void);
+extern void zvol_init(void);
+extern void zvol_fini(void);
+
+extern int zvol_get_volume_params(minor_t minor, uint64_t *blksize,
+    uint64_t *max_xfer_len, void **minor_hdl, void **objset_hdl, void **zil_hdl,
+    void **rl_hdl, void **bonus_hdl);
+extern uint64_t zvol_get_volume_size(void *minor_hdl);
+extern int zvol_get_volume_wce(void *minor_hdl);
+extern void zvol_log_write_minor(void *minor_hdl, dmu_tx_t *tx, offset_t off,
+    ssize_t resid, boolean_t sync);
+
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ZVOL_H */
diff --git a/uts/common/fs/zfs/txg.c b/uts/common/fs/zfs/txg.c
new file mode 100644
index 000000000000..9b308ca4e71a
--- /dev/null
+++ b/uts/common/fs/zfs/txg.c
@@ -0,0 +1,724 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/txg_impl.h>
+#include <sys/dmu_impl.h>
+#include <sys/dmu_tx.h>
+#include <sys/dsl_pool.h>
+#include <sys/dsl_scan.h>
+#include <sys/callb.h>
+
+/*
+ * Pool-wide transaction groups.
+ */
+
+static void txg_sync_thread(dsl_pool_t *dp);
+static void txg_quiesce_thread(dsl_pool_t *dp);
+
+int zfs_txg_timeout = 5;	/* max seconds worth of delta per txg */
+
+/*
+ * Prepare the txg subsystem.
+ */
+void
+txg_init(dsl_pool_t *dp, uint64_t txg)
+{
+	tx_state_t *tx = &dp->dp_tx;
+	int c;
+	bzero(tx, sizeof (tx_state_t));
+
+	tx->tx_cpu = kmem_zalloc(max_ncpus * sizeof (tx_cpu_t), KM_SLEEP);
+
+	for (c = 0; c < max_ncpus; c++) {
+		int i;
+
+		mutex_init(&tx->tx_cpu[c].tc_lock, NULL, MUTEX_DEFAULT, NULL);
+		for (i = 0; i < TXG_SIZE; i++) {
+			cv_init(&tx->tx_cpu[c].tc_cv[i], NULL, CV_DEFAULT,
+			    NULL);
+			list_create(&tx->tx_cpu[c].tc_callbacks[i],
+			    sizeof (dmu_tx_callback_t),
+			    offsetof(dmu_tx_callback_t, dcb_node));
+		}
+	}
+
+	mutex_init(&tx->tx_sync_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	cv_init(&tx->tx_sync_more_cv, NULL, CV_DEFAULT, NULL);
+	cv_init(&tx->tx_sync_done_cv, NULL, CV_DEFAULT, NULL);
+	cv_init(&tx->tx_quiesce_more_cv, NULL, CV_DEFAULT, NULL);
+	cv_init(&tx->tx_quiesce_done_cv, NULL, CV_DEFAULT, NULL);
+	cv_init(&tx->tx_exit_cv, NULL, CV_DEFAULT, NULL);
+
+	tx->tx_open_txg = txg;
+}
+
+/*
+ * Close down the txg subsystem.
+ */
+void
+txg_fini(dsl_pool_t *dp)
+{
+	tx_state_t *tx = &dp->dp_tx;
+	int c;
+
+	ASSERT(tx->tx_threads == 0);
+
+	mutex_destroy(&tx->tx_sync_lock);
+
+	cv_destroy(&tx->tx_sync_more_cv);
+	cv_destroy(&tx->tx_sync_done_cv);
+	cv_destroy(&tx->tx_quiesce_more_cv);
+	cv_destroy(&tx->tx_quiesce_done_cv);
+	cv_destroy(&tx->tx_exit_cv);
+
+	for (c = 0; c < max_ncpus; c++) {
+		int i;
+
+		mutex_destroy(&tx->tx_cpu[c].tc_lock);
+		for (i = 0; i < TXG_SIZE; i++) {
+			cv_destroy(&tx->tx_cpu[c].tc_cv[i]);
+			list_destroy(&tx->tx_cpu[c].tc_callbacks[i]);
+		}
+	}
+
+	if (tx->tx_commit_cb_taskq != NULL)
+		taskq_destroy(tx->tx_commit_cb_taskq);
+
+	kmem_free(tx->tx_cpu, max_ncpus * sizeof (tx_cpu_t));
+
+	bzero(tx, sizeof (tx_state_t));
+}
+
+/*
+ * Start syncing transaction groups.
+ */
+void
+txg_sync_start(dsl_pool_t *dp)
+{
+	tx_state_t *tx = &dp->dp_tx;
+
+	mutex_enter(&tx->tx_sync_lock);
+
+	dprintf("pool %p\n", dp);
+
+	ASSERT(tx->tx_threads == 0);
+
+	tx->tx_threads = 2;
+
+	tx->tx_quiesce_thread = thread_create(NULL, 0, txg_quiesce_thread,
+	    dp, 0, &p0, TS_RUN, minclsyspri);
+
+	/*
+	 * The sync thread can need a larger-than-default stack size on
+	 * 32-bit x86.  This is due in part to nested pools and
+	 * scrub_visitbp() recursion.
+	 */
+	tx->tx_sync_thread = thread_create(NULL, 32<<10, txg_sync_thread,
+	    dp, 0, &p0, TS_RUN, minclsyspri);
+
+	mutex_exit(&tx->tx_sync_lock);
+}
+
+static void
+txg_thread_enter(tx_state_t *tx, callb_cpr_t *cpr)
+{
+	CALLB_CPR_INIT(cpr, &tx->tx_sync_lock, callb_generic_cpr, FTAG);
+	mutex_enter(&tx->tx_sync_lock);
+}
+
+static void
+txg_thread_exit(tx_state_t *tx, callb_cpr_t *cpr, kthread_t **tpp)
+{
+	ASSERT(*tpp != NULL);
+	*tpp = NULL;
+	tx->tx_threads--;
+	cv_broadcast(&tx->tx_exit_cv);
+	CALLB_CPR_EXIT(cpr);		/* drops &tx->tx_sync_lock */
+	thread_exit();
+}
+
+static void
+txg_thread_wait(tx_state_t *tx, callb_cpr_t *cpr, kcondvar_t *cv, uint64_t time)
+{
+	CALLB_CPR_SAFE_BEGIN(cpr);
+
+	if (time)
+		(void) cv_timedwait(cv, &tx->tx_sync_lock,
+		    ddi_get_lbolt() + time);
+	else
+		cv_wait(cv, &tx->tx_sync_lock);
+
+	CALLB_CPR_SAFE_END(cpr, &tx->tx_sync_lock);
+}
+
+/*
+ * Stop syncing transaction groups.
+ */
+void
+txg_sync_stop(dsl_pool_t *dp)
+{
+	tx_state_t *tx = &dp->dp_tx;
+
+	dprintf("pool %p\n", dp);
+	/*
+	 * Finish off any work in progress.
+	 */
+	ASSERT(tx->tx_threads == 2);
+
+	/*
+	 * We need to ensure that we've vacated the deferred space_maps.
+	 */
+	txg_wait_synced(dp, tx->tx_open_txg + TXG_DEFER_SIZE);
+
+	/*
+	 * Wake all sync threads and wait for them to die.
+	 */
+	mutex_enter(&tx->tx_sync_lock);
+
+	ASSERT(tx->tx_threads == 2);
+
+	tx->tx_exiting = 1;
+
+	cv_broadcast(&tx->tx_quiesce_more_cv);
+	cv_broadcast(&tx->tx_quiesce_done_cv);
+	cv_broadcast(&tx->tx_sync_more_cv);
+
+	while (tx->tx_threads != 0)
+		cv_wait(&tx->tx_exit_cv, &tx->tx_sync_lock);
+
+	tx->tx_exiting = 0;
+
+	mutex_exit(&tx->tx_sync_lock);
+}
+
+uint64_t
+txg_hold_open(dsl_pool_t *dp, txg_handle_t *th)
+{
+	tx_state_t *tx = &dp->dp_tx;
+	tx_cpu_t *tc = &tx->tx_cpu[CPU_SEQID];
+	uint64_t txg;
+
+	mutex_enter(&tc->tc_lock);
+
+	txg = tx->tx_open_txg;
+	tc->tc_count[txg & TXG_MASK]++;
+
+	th->th_cpu = tc;
+	th->th_txg = txg;
+
+	return (txg);
+}
+
+void
+txg_rele_to_quiesce(txg_handle_t *th)
+{
+	tx_cpu_t *tc = th->th_cpu;
+
+	mutex_exit(&tc->tc_lock);
+}
+
+void
+txg_register_callbacks(txg_handle_t *th, list_t *tx_callbacks)
+{
+	tx_cpu_t *tc = th->th_cpu;
+	int g = th->th_txg & TXG_MASK;
+
+	mutex_enter(&tc->tc_lock);
+	list_move_tail(&tc->tc_callbacks[g], tx_callbacks);
+	mutex_exit(&tc->tc_lock);
+}
+
+void
+txg_rele_to_sync(txg_handle_t *th)
+{
+	tx_cpu_t *tc = th->th_cpu;
+	int g = th->th_txg & TXG_MASK;
+
+	mutex_enter(&tc->tc_lock);
+	ASSERT(tc->tc_count[g] != 0);
+	if (--tc->tc_count[g] == 0)
+		cv_broadcast(&tc->tc_cv[g]);
+	mutex_exit(&tc->tc_lock);
+
+	th->th_cpu = NULL;	/* defensive */
+}
+
+static void
+txg_quiesce(dsl_pool_t *dp, uint64_t txg)
+{
+	tx_state_t *tx = &dp->dp_tx;
+	int g = txg & TXG_MASK;
+	int c;
+
+	/*
+	 * Grab all tx_cpu locks so nobody else can get into this txg.
+	 */
+	for (c = 0; c < max_ncpus; c++)
+		mutex_enter(&tx->tx_cpu[c].tc_lock);
+
+	ASSERT(txg == tx->tx_open_txg);
+	tx->tx_open_txg++;
+
+	/*
+	 * Now that we've incremented tx_open_txg, we can let threads
+	 * enter the next transaction group.
+	 */
+	for (c = 0; c < max_ncpus; c++)
+		mutex_exit(&tx->tx_cpu[c].tc_lock);
+
+	/*
+	 * Quiesce the transaction group by waiting for everyone to txg_exit().
+	 */
+	for (c = 0; c < max_ncpus; c++) {
+		tx_cpu_t *tc = &tx->tx_cpu[c];
+		mutex_enter(&tc->tc_lock);
+		while (tc->tc_count[g] != 0)
+			cv_wait(&tc->tc_cv[g], &tc->tc_lock);
+		mutex_exit(&tc->tc_lock);
+	}
+}
+
+static void
+txg_do_callbacks(list_t *cb_list)
+{
+	dmu_tx_do_callbacks(cb_list, 0);
+
+	list_destroy(cb_list);
+
+	kmem_free(cb_list, sizeof (list_t));
+}
+
+/*
+ * Dispatch the commit callbacks registered on this txg to worker threads.
+ */
+static void
+txg_dispatch_callbacks(dsl_pool_t *dp, uint64_t txg)
+{
+	int c;
+	tx_state_t *tx = &dp->dp_tx;
+	list_t *cb_list;
+
+	for (c = 0; c < max_ncpus; c++) {
+		tx_cpu_t *tc = &tx->tx_cpu[c];
+		/* No need to lock tx_cpu_t at this point */
+
+		int g = txg & TXG_MASK;
+
+		if (list_is_empty(&tc->tc_callbacks[g]))
+			continue;
+
+		if (tx->tx_commit_cb_taskq == NULL) {
+			/*
+			 * Commit callback taskq hasn't been created yet.
+			 */
+			tx->tx_commit_cb_taskq = taskq_create("tx_commit_cb",
+			    max_ncpus, minclsyspri, max_ncpus, max_ncpus * 2,
+			    TASKQ_PREPOPULATE);
+		}
+
+		cb_list = kmem_alloc(sizeof (list_t), KM_SLEEP);
+		list_create(cb_list, sizeof (dmu_tx_callback_t),
+		    offsetof(dmu_tx_callback_t, dcb_node));
+
+		list_move_tail(&tc->tc_callbacks[g], cb_list);
+
+		(void) taskq_dispatch(tx->tx_commit_cb_taskq, (task_func_t *)
+		    txg_do_callbacks, cb_list, TQ_SLEEP);
+	}
+}
+
+static void
+txg_sync_thread(dsl_pool_t *dp)
+{
+	spa_t *spa = dp->dp_spa;
+	tx_state_t *tx = &dp->dp_tx;
+	callb_cpr_t cpr;
+	uint64_t start, delta;
+
+	txg_thread_enter(tx, &cpr);
+
+	start = delta = 0;
+	for (;;) {
+		uint64_t timer, timeout = zfs_txg_timeout * hz;
+		uint64_t txg;
+
+		/*
+		 * We sync when we're scanning, there's someone waiting
+		 * on us, or the quiesce thread has handed off a txg to
+		 * us, or we have reached our timeout.
+		 */
+		timer = (delta >= timeout ? 0 : timeout - delta);
+		while (!dsl_scan_active(dp->dp_scan) &&
+		    !tx->tx_exiting && timer > 0 &&
+		    tx->tx_synced_txg >= tx->tx_sync_txg_waiting &&
+		    tx->tx_quiesced_txg == 0) {
+			dprintf("waiting; tx_synced=%llu waiting=%llu dp=%p\n",
+			    tx->tx_synced_txg, tx->tx_sync_txg_waiting, dp);
+			txg_thread_wait(tx, &cpr, &tx->tx_sync_more_cv, timer);
+			delta = ddi_get_lbolt() - start;
+			timer = (delta > timeout ? 0 : timeout - delta);
+		}
+
+		/*
+		 * Wait until the quiesce thread hands off a txg to us,
+		 * prompting it to do so if necessary.
+		 */
+		while (!tx->tx_exiting && tx->tx_quiesced_txg == 0) {
+			if (tx->tx_quiesce_txg_waiting < tx->tx_open_txg+1)
+				tx->tx_quiesce_txg_waiting = tx->tx_open_txg+1;
+			cv_broadcast(&tx->tx_quiesce_more_cv);
+			txg_thread_wait(tx, &cpr, &tx->tx_quiesce_done_cv, 0);
+		}
+
+		if (tx->tx_exiting)
+			txg_thread_exit(tx, &cpr, &tx->tx_sync_thread);
+
+		/*
+		 * Consume the quiesced txg which has been handed off to
+		 * us.  This may cause the quiescing thread to now be
+		 * able to quiesce another txg, so we must signal it.
+		 */
+		txg = tx->tx_quiesced_txg;
+		tx->tx_quiesced_txg = 0;
+		tx->tx_syncing_txg = txg;
+		cv_broadcast(&tx->tx_quiesce_more_cv);
+
+		dprintf("txg=%llu quiesce_txg=%llu sync_txg=%llu\n",
+		    txg, tx->tx_quiesce_txg_waiting, tx->tx_sync_txg_waiting);
+		mutex_exit(&tx->tx_sync_lock);
+
+		start = ddi_get_lbolt();
+		spa_sync(spa, txg);
+		delta = ddi_get_lbolt() - start;
+
+		mutex_enter(&tx->tx_sync_lock);
+		tx->tx_synced_txg = txg;
+		tx->tx_syncing_txg = 0;
+		cv_broadcast(&tx->tx_sync_done_cv);
+
+		/*
+		 * Dispatch commit callbacks to worker threads.
+		 */
+		txg_dispatch_callbacks(dp, txg);
+	}
+}
+
+static void
+txg_quiesce_thread(dsl_pool_t *dp)
+{
+	tx_state_t *tx = &dp->dp_tx;
+	callb_cpr_t cpr;
+
+	txg_thread_enter(tx, &cpr);
+
+	for (;;) {
+		uint64_t txg;
+
+		/*
+		 * We quiesce when there's someone waiting on us.
+		 * However, we can only have one txg in "quiescing" or
+		 * "quiesced, waiting to sync" state.  So we wait until
+		 * the "quiesced, waiting to sync" txg has been consumed
+		 * by the sync thread.
+		 */
+		while (!tx->tx_exiting &&
+		    (tx->tx_open_txg >= tx->tx_quiesce_txg_waiting ||
+		    tx->tx_quiesced_txg != 0))
+			txg_thread_wait(tx, &cpr, &tx->tx_quiesce_more_cv, 0);
+
+		if (tx->tx_exiting)
+			txg_thread_exit(tx, &cpr, &tx->tx_quiesce_thread);
+
+		txg = tx->tx_open_txg;
+		dprintf("txg=%llu quiesce_txg=%llu sync_txg=%llu\n",
+		    txg, tx->tx_quiesce_txg_waiting,
+		    tx->tx_sync_txg_waiting);
+		mutex_exit(&tx->tx_sync_lock);
+		txg_quiesce(dp, txg);
+		mutex_enter(&tx->tx_sync_lock);
+
+		/*
+		 * Hand this txg off to the sync thread.
+		 */
+		dprintf("quiesce done, handing off txg %llu\n", txg);
+		tx->tx_quiesced_txg = txg;
+		cv_broadcast(&tx->tx_sync_more_cv);
+		cv_broadcast(&tx->tx_quiesce_done_cv);
+	}
+}
+
+/*
+ * Delay this thread by 'ticks' if we are still in the open transaction
+ * group and there is already a waiting txg quiesing or quiesced.  Abort
+ * the delay if this txg stalls or enters the quiesing state.
+ */
+void
+txg_delay(dsl_pool_t *dp, uint64_t txg, int ticks)
+{
+	tx_state_t *tx = &dp->dp_tx;
+	int timeout = ddi_get_lbolt() + ticks;
+
+	/* don't delay if this txg could transition to quiesing immediately */
+	if (tx->tx_open_txg > txg ||
+	    tx->tx_syncing_txg == txg-1 || tx->tx_synced_txg == txg-1)
+		return;
+
+	mutex_enter(&tx->tx_sync_lock);
+	if (tx->tx_open_txg > txg || tx->tx_synced_txg == txg-1) {
+		mutex_exit(&tx->tx_sync_lock);
+		return;
+	}
+
+	while (ddi_get_lbolt() < timeout &&
+	    tx->tx_syncing_txg < txg-1 && !txg_stalled(dp))
+		(void) cv_timedwait(&tx->tx_quiesce_more_cv, &tx->tx_sync_lock,
+		    timeout);
+
+	mutex_exit(&tx->tx_sync_lock);
+}
+
+void
+txg_wait_synced(dsl_pool_t *dp, uint64_t txg)
+{
+	tx_state_t *tx = &dp->dp_tx;
+
+	mutex_enter(&tx->tx_sync_lock);
+	ASSERT(tx->tx_threads == 2);
+	if (txg == 0)
+		txg = tx->tx_open_txg + TXG_DEFER_SIZE;
+	if (tx->tx_sync_txg_waiting < txg)
+		tx->tx_sync_txg_waiting = txg;
+	dprintf("txg=%llu quiesce_txg=%llu sync_txg=%llu\n",
+	    txg, tx->tx_quiesce_txg_waiting, tx->tx_sync_txg_waiting);
+	while (tx->tx_synced_txg < txg) {
+		dprintf("broadcasting sync more "
+		    "tx_synced=%llu waiting=%llu dp=%p\n",
+		    tx->tx_synced_txg, tx->tx_sync_txg_waiting, dp);
+		cv_broadcast(&tx->tx_sync_more_cv);
+		cv_wait(&tx->tx_sync_done_cv, &tx->tx_sync_lock);
+	}
+	mutex_exit(&tx->tx_sync_lock);
+}
+
+void
+txg_wait_open(dsl_pool_t *dp, uint64_t txg)
+{
+	tx_state_t *tx = &dp->dp_tx;
+
+	mutex_enter(&tx->tx_sync_lock);
+	ASSERT(tx->tx_threads == 2);
+	if (txg == 0)
+		txg = tx->tx_open_txg + 1;
+	if (tx->tx_quiesce_txg_waiting < txg)
+		tx->tx_quiesce_txg_waiting = txg;
+	dprintf("txg=%llu quiesce_txg=%llu sync_txg=%llu\n",
+	    txg, tx->tx_quiesce_txg_waiting, tx->tx_sync_txg_waiting);
+	while (tx->tx_open_txg < txg) {
+		cv_broadcast(&tx->tx_quiesce_more_cv);
+		cv_wait(&tx->tx_quiesce_done_cv, &tx->tx_sync_lock);
+	}
+	mutex_exit(&tx->tx_sync_lock);
+}
+
+boolean_t
+txg_stalled(dsl_pool_t *dp)
+{
+	tx_state_t *tx = &dp->dp_tx;
+	return (tx->tx_quiesce_txg_waiting > tx->tx_open_txg);
+}
+
+boolean_t
+txg_sync_waiting(dsl_pool_t *dp)
+{
+	tx_state_t *tx = &dp->dp_tx;
+
+	return (tx->tx_syncing_txg <= tx->tx_sync_txg_waiting ||
+	    tx->tx_quiesced_txg != 0);
+}
+
+/*
+ * Per-txg object lists.
+ */
+void
+txg_list_create(txg_list_t *tl, size_t offset)
+{
+	int t;
+
+	mutex_init(&tl->tl_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	tl->tl_offset = offset;
+
+	for (t = 0; t < TXG_SIZE; t++)
+		tl->tl_head[t] = NULL;
+}
+
+void
+txg_list_destroy(txg_list_t *tl)
+{
+	int t;
+
+	for (t = 0; t < TXG_SIZE; t++)
+		ASSERT(txg_list_empty(tl, t));
+
+	mutex_destroy(&tl->tl_lock);
+}
+
+int
+txg_list_empty(txg_list_t *tl, uint64_t txg)
+{
+	return (tl->tl_head[txg & TXG_MASK] == NULL);
+}
+
+/*
+ * Add an entry to the list.
+ * Returns 0 if it's a new entry, 1 if it's already there.
+ */
+int
+txg_list_add(txg_list_t *tl, void *p, uint64_t txg)
+{
+	int t = txg & TXG_MASK;
+	txg_node_t *tn = (txg_node_t *)((char *)p + tl->tl_offset);
+	int already_on_list;
+
+	mutex_enter(&tl->tl_lock);
+	already_on_list = tn->tn_member[t];
+	if (!already_on_list) {
+		tn->tn_member[t] = 1;
+		tn->tn_next[t] = tl->tl_head[t];
+		tl->tl_head[t] = tn;
+	}
+	mutex_exit(&tl->tl_lock);
+
+	return (already_on_list);
+}
+
+/*
+ * Add an entry to the end of the list (walks list to find end).
+ * Returns 0 if it's a new entry, 1 if it's already there.
+ */
+int
+txg_list_add_tail(txg_list_t *tl, void *p, uint64_t txg)
+{
+	int t = txg & TXG_MASK;
+	txg_node_t *tn = (txg_node_t *)((char *)p + tl->tl_offset);
+	int already_on_list;
+
+	mutex_enter(&tl->tl_lock);
+	already_on_list = tn->tn_member[t];
+	if (!already_on_list) {
+		txg_node_t **tp;
+
+		for (tp = &tl->tl_head[t]; *tp != NULL; tp = &(*tp)->tn_next[t])
+			continue;
+
+		tn->tn_member[t] = 1;
+		tn->tn_next[t] = NULL;
+		*tp = tn;
+	}
+	mutex_exit(&tl->tl_lock);
+
+	return (already_on_list);
+}
+
+/*
+ * Remove the head of the list and return it.
+ */
+void *
+txg_list_remove(txg_list_t *tl, uint64_t txg)
+{
+	int t = txg & TXG_MASK;
+	txg_node_t *tn;
+	void *p = NULL;
+
+	mutex_enter(&tl->tl_lock);
+	if ((tn = tl->tl_head[t]) != NULL) {
+		p = (char *)tn - tl->tl_offset;
+		tl->tl_head[t] = tn->tn_next[t];
+		tn->tn_next[t] = NULL;
+		tn->tn_member[t] = 0;
+	}
+	mutex_exit(&tl->tl_lock);
+
+	return (p);
+}
+
+/*
+ * Remove a specific item from the list and return it.
+ */
+void *
+txg_list_remove_this(txg_list_t *tl, void *p, uint64_t txg)
+{
+	int t = txg & TXG_MASK;
+	txg_node_t *tn, **tp;
+
+	mutex_enter(&tl->tl_lock);
+
+	for (tp = &tl->tl_head[t]; (tn = *tp) != NULL; tp = &tn->tn_next[t]) {
+		if ((char *)tn - tl->tl_offset == p) {
+			*tp = tn->tn_next[t];
+			tn->tn_next[t] = NULL;
+			tn->tn_member[t] = 0;
+			mutex_exit(&tl->tl_lock);
+			return (p);
+		}
+	}
+
+	mutex_exit(&tl->tl_lock);
+
+	return (NULL);
+}
+
+int
+txg_list_member(txg_list_t *tl, void *p, uint64_t txg)
+{
+	int t = txg & TXG_MASK;
+	txg_node_t *tn = (txg_node_t *)((char *)p + tl->tl_offset);
+
+	return (tn->tn_member[t]);
+}
+
+/*
+ * Walk a txg list -- only safe if you know it's not changing.
+ */
+void *
+txg_list_head(txg_list_t *tl, uint64_t txg)
+{
+	int t = txg & TXG_MASK;
+	txg_node_t *tn = tl->tl_head[t];
+
+	return (tn == NULL ? NULL : (char *)tn - tl->tl_offset);
+}
+
+void *
+txg_list_next(txg_list_t *tl, void *p, uint64_t txg)
+{
+	int t = txg & TXG_MASK;
+	txg_node_t *tn = (txg_node_t *)((char *)p + tl->tl_offset);
+
+	tn = tn->tn_next[t];
+
+	return (tn == NULL ? NULL : (char *)tn - tl->tl_offset);
+}
diff --git a/uts/common/fs/zfs/uberblock.c b/uts/common/fs/zfs/uberblock.c
new file mode 100644
index 000000000000..692cda137f1a
--- /dev/null
+++ b/uts/common/fs/zfs/uberblock.c
@@ -0,0 +1,61 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/uberblock_impl.h>
+#include <sys/vdev_impl.h>
+
+int
+uberblock_verify(uberblock_t *ub)
+{
+	if (ub->ub_magic == BSWAP_64((uint64_t)UBERBLOCK_MAGIC))
+		byteswap_uint64_array(ub, sizeof (uberblock_t));
+
+	if (ub->ub_magic != UBERBLOCK_MAGIC)
+		return (EINVAL);
+
+	return (0);
+}
+
+/*
+ * Update the uberblock and return a boolean value indicating whether
+ * anything changed in this transaction group.
+ */
+int
+uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg)
+{
+	ASSERT(ub->ub_txg < txg);
+
+	/*
+	 * We explicitly do not set ub_version here, so that older versions
+	 * continue to be written with the previous uberblock version.
+	 */
+	ub->ub_magic = UBERBLOCK_MAGIC;
+	ub->ub_txg = txg;
+	ub->ub_guid_sum = rvd->vdev_guid_sum;
+	ub->ub_timestamp = gethrestime_sec();
+	ub->ub_software_version = SPA_VERSION;
+
+	return (ub->ub_rootbp.blk_birth == txg);
+}
diff --git a/uts/common/fs/zfs/unique.c b/uts/common/fs/zfs/unique.c
new file mode 100644
index 000000000000..fbe7b619a29a
--- /dev/null
+++ b/uts/common/fs/zfs/unique.c
@@ -0,0 +1,116 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/zfs_context.h>
+#include <sys/avl.h>
+#include <sys/unique.h>
+
+static avl_tree_t unique_avl;
+static kmutex_t unique_mtx;
+
+typedef struct unique {
+	avl_node_t un_link;
+	uint64_t un_value;
+} unique_t;
+
+#define	UNIQUE_MASK ((1ULL << UNIQUE_BITS) - 1)
+
+static int
+unique_compare(const void *a, const void *b)
+{
+	const unique_t *una = a;
+	const unique_t *unb = b;
+
+	if (una->un_value < unb->un_value)
+		return (-1);
+	if (una->un_value > unb->un_value)
+		return (+1);
+	return (0);
+}
+
+void
+unique_init(void)
+{
+	avl_create(&unique_avl, unique_compare,
+	    sizeof (unique_t), offsetof(unique_t, un_link));
+	mutex_init(&unique_mtx, NULL, MUTEX_DEFAULT, NULL);
+}
+
+void
+unique_fini(void)
+{
+	avl_destroy(&unique_avl);
+	mutex_destroy(&unique_mtx);
+}
+
+uint64_t
+unique_create(void)
+{
+	uint64_t value = unique_insert(0);
+	unique_remove(value);
+	return (value);
+}
+
+uint64_t
+unique_insert(uint64_t value)
+{
+	avl_index_t idx;
+	unique_t *un = kmem_alloc(sizeof (unique_t), KM_SLEEP);
+
+	un->un_value = value;
+
+	mutex_enter(&unique_mtx);
+	while (un->un_value == 0 || un->un_value & ~UNIQUE_MASK ||
+	    avl_find(&unique_avl, un, &idx)) {
+		mutex_exit(&unique_mtx);
+		(void) random_get_pseudo_bytes((void*)&un->un_value,
+		    sizeof (un->un_value));
+		un->un_value &= UNIQUE_MASK;
+		mutex_enter(&unique_mtx);
+	}
+
+	avl_insert(&unique_avl, un, idx);
+	mutex_exit(&unique_mtx);
+
+	return (un->un_value);
+}
+
+void
+unique_remove(uint64_t value)
+{
+	unique_t un_tofind;
+	unique_t *un;
+
+	un_tofind.un_value = value;
+	mutex_enter(&unique_mtx);
+	un = avl_find(&unique_avl, &un_tofind, NULL);
+	if (un != NULL) {
+		avl_remove(&unique_avl, un);
+		kmem_free(un, sizeof (unique_t));
+	}
+	mutex_exit(&unique_mtx);
+}
diff --git a/uts/common/fs/zfs/vdev.c b/uts/common/fs/zfs/vdev.c
new file mode 100644
index 000000000000..bac3e86054d6
--- /dev/null
+++ b/uts/common/fs/zfs/vdev.c
@@ -0,0 +1,3130 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/fm/fs/zfs.h>
+#include <sys/spa.h>
+#include <sys/spa_impl.h>
+#include <sys/dmu.h>
+#include <sys/dmu_tx.h>
+#include <sys/vdev_impl.h>
+#include <sys/uberblock_impl.h>
+#include <sys/metaslab.h>
+#include <sys/metaslab_impl.h>
+#include <sys/space_map.h>
+#include <sys/zio.h>
+#include <sys/zap.h>
+#include <sys/fs/zfs.h>
+#include <sys/arc.h>
+#include <sys/zil.h>
+#include <sys/dsl_scan.h>
+
+/*
+ * Virtual device management.
+ */
+
+static vdev_ops_t *vdev_ops_table[] = {
+	&vdev_root_ops,
+	&vdev_raidz_ops,
+	&vdev_mirror_ops,
+	&vdev_replacing_ops,
+	&vdev_spare_ops,
+	&vdev_disk_ops,
+	&vdev_file_ops,
+	&vdev_missing_ops,
+	&vdev_hole_ops,
+	NULL
+};
+
+/* maximum scrub/resilver I/O queue per leaf vdev */
+int zfs_scrub_limit = 10;
+
+/*
+ * Given a vdev type, return the appropriate ops vector.
+ */
+static vdev_ops_t *
+vdev_getops(const char *type)
+{
+	vdev_ops_t *ops, **opspp;
+
+	for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++)
+		if (strcmp(ops->vdev_op_type, type) == 0)
+			break;
+
+	return (ops);
+}
+
+/*
+ * Default asize function: return the MAX of psize with the asize of
+ * all children.  This is what's used by anything other than RAID-Z.
+ */
+uint64_t
+vdev_default_asize(vdev_t *vd, uint64_t psize)
+{
+	uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift);
+	uint64_t csize;
+
+	for (int c = 0; c < vd->vdev_children; c++) {
+		csize = vdev_psize_to_asize(vd->vdev_child[c], psize);
+		asize = MAX(asize, csize);
+	}
+
+	return (asize);
+}
+
+/*
+ * Get the minimum allocatable size. We define the allocatable size as
+ * the vdev's asize rounded to the nearest metaslab. This allows us to
+ * replace or attach devices which don't have the same physical size but
+ * can still satisfy the same number of allocations.
+ */
+uint64_t
+vdev_get_min_asize(vdev_t *vd)
+{
+	vdev_t *pvd = vd->vdev_parent;
+
+	/*
+	 * The our parent is NULL (inactive spare or cache) or is the root,
+	 * just return our own asize.
+	 */
+	if (pvd == NULL)
+		return (vd->vdev_asize);
+
+	/*
+	 * The top-level vdev just returns the allocatable size rounded
+	 * to the nearest metaslab.
+	 */
+	if (vd == vd->vdev_top)
+		return (P2ALIGN(vd->vdev_asize, 1ULL << vd->vdev_ms_shift));
+
+	/*
+	 * The allocatable space for a raidz vdev is N * sizeof(smallest child),
+	 * so each child must provide at least 1/Nth of its asize.
+	 */
+	if (pvd->vdev_ops == &vdev_raidz_ops)
+		return (pvd->vdev_min_asize / pvd->vdev_children);
+
+	return (pvd->vdev_min_asize);
+}
+
+void
+vdev_set_min_asize(vdev_t *vd)
+{
+	vd->vdev_min_asize = vdev_get_min_asize(vd);
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_set_min_asize(vd->vdev_child[c]);
+}
+
+vdev_t *
+vdev_lookup_top(spa_t *spa, uint64_t vdev)
+{
+	vdev_t *rvd = spa->spa_root_vdev;
+
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0);
+
+	if (vdev < rvd->vdev_children) {
+		ASSERT(rvd->vdev_child[vdev] != NULL);
+		return (rvd->vdev_child[vdev]);
+	}
+
+	return (NULL);
+}
+
+vdev_t *
+vdev_lookup_by_guid(vdev_t *vd, uint64_t guid)
+{
+	vdev_t *mvd;
+
+	if (vd->vdev_guid == guid)
+		return (vd);
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) !=
+		    NULL)
+			return (mvd);
+
+	return (NULL);
+}
+
+void
+vdev_add_child(vdev_t *pvd, vdev_t *cvd)
+{
+	size_t oldsize, newsize;
+	uint64_t id = cvd->vdev_id;
+	vdev_t **newchild;
+
+	ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+	ASSERT(cvd->vdev_parent == NULL);
+
+	cvd->vdev_parent = pvd;
+
+	if (pvd == NULL)
+		return;
+
+	ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL);
+
+	oldsize = pvd->vdev_children * sizeof (vdev_t *);
+	pvd->vdev_children = MAX(pvd->vdev_children, id + 1);
+	newsize = pvd->vdev_children * sizeof (vdev_t *);
+
+	newchild = kmem_zalloc(newsize, KM_SLEEP);
+	if (pvd->vdev_child != NULL) {
+		bcopy(pvd->vdev_child, newchild, oldsize);
+		kmem_free(pvd->vdev_child, oldsize);
+	}
+
+	pvd->vdev_child = newchild;
+	pvd->vdev_child[id] = cvd;
+
+	cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd);
+	ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL);
+
+	/*
+	 * Walk up all ancestors to update guid sum.
+	 */
+	for (; pvd != NULL; pvd = pvd->vdev_parent)
+		pvd->vdev_guid_sum += cvd->vdev_guid_sum;
+}
+
+void
+vdev_remove_child(vdev_t *pvd, vdev_t *cvd)
+{
+	int c;
+	uint_t id = cvd->vdev_id;
+
+	ASSERT(cvd->vdev_parent == pvd);
+
+	if (pvd == NULL)
+		return;
+
+	ASSERT(id < pvd->vdev_children);
+	ASSERT(pvd->vdev_child[id] == cvd);
+
+	pvd->vdev_child[id] = NULL;
+	cvd->vdev_parent = NULL;
+
+	for (c = 0; c < pvd->vdev_children; c++)
+		if (pvd->vdev_child[c])
+			break;
+
+	if (c == pvd->vdev_children) {
+		kmem_free(pvd->vdev_child, c * sizeof (vdev_t *));
+		pvd->vdev_child = NULL;
+		pvd->vdev_children = 0;
+	}
+
+	/*
+	 * Walk up all ancestors to update guid sum.
+	 */
+	for (; pvd != NULL; pvd = pvd->vdev_parent)
+		pvd->vdev_guid_sum -= cvd->vdev_guid_sum;
+}
+
+/*
+ * Remove any holes in the child array.
+ */
+void
+vdev_compact_children(vdev_t *pvd)
+{
+	vdev_t **newchild, *cvd;
+	int oldc = pvd->vdev_children;
+	int newc;
+
+	ASSERT(spa_config_held(pvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+
+	for (int c = newc = 0; c < oldc; c++)
+		if (pvd->vdev_child[c])
+			newc++;
+
+	newchild = kmem_alloc(newc * sizeof (vdev_t *), KM_SLEEP);
+
+	for (int c = newc = 0; c < oldc; c++) {
+		if ((cvd = pvd->vdev_child[c]) != NULL) {
+			newchild[newc] = cvd;
+			cvd->vdev_id = newc++;
+		}
+	}
+
+	kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *));
+	pvd->vdev_child = newchild;
+	pvd->vdev_children = newc;
+}
+
+/*
+ * Allocate and minimally initialize a vdev_t.
+ */
+vdev_t *
+vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops)
+{
+	vdev_t *vd;
+
+	vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP);
+
+	if (spa->spa_root_vdev == NULL) {
+		ASSERT(ops == &vdev_root_ops);
+		spa->spa_root_vdev = vd;
+	}
+
+	if (guid == 0 && ops != &vdev_hole_ops) {
+		if (spa->spa_root_vdev == vd) {
+			/*
+			 * The root vdev's guid will also be the pool guid,
+			 * which must be unique among all pools.
+			 */
+			guid = spa_generate_guid(NULL);
+		} else {
+			/*
+			 * Any other vdev's guid must be unique within the pool.
+			 */
+			guid = spa_generate_guid(spa);
+		}
+		ASSERT(!spa_guid_exists(spa_guid(spa), guid));
+	}
+
+	vd->vdev_spa = spa;
+	vd->vdev_id = id;
+	vd->vdev_guid = guid;
+	vd->vdev_guid_sum = guid;
+	vd->vdev_ops = ops;
+	vd->vdev_state = VDEV_STATE_CLOSED;
+	vd->vdev_ishole = (ops == &vdev_hole_ops);
+
+	mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&vd->vdev_probe_lock, NULL, MUTEX_DEFAULT, NULL);
+	for (int t = 0; t < DTL_TYPES; t++) {
+		space_map_create(&vd->vdev_dtl[t], 0, -1ULL, 0,
+		    &vd->vdev_dtl_lock);
+	}
+	txg_list_create(&vd->vdev_ms_list,
+	    offsetof(struct metaslab, ms_txg_node));
+	txg_list_create(&vd->vdev_dtl_list,
+	    offsetof(struct vdev, vdev_dtl_node));
+	vd->vdev_stat.vs_timestamp = gethrtime();
+	vdev_queue_init(vd);
+	vdev_cache_init(vd);
+
+	return (vd);
+}
+
+/*
+ * Allocate a new vdev.  The 'alloctype' is used to control whether we are
+ * creating a new vdev or loading an existing one - the behavior is slightly
+ * different for each case.
+ */
+int
+vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id,
+    int alloctype)
+{
+	vdev_ops_t *ops;
+	char *type;
+	uint64_t guid = 0, islog, nparity;
+	vdev_t *vd;
+
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+
+	if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0)
+		return (EINVAL);
+
+	if ((ops = vdev_getops(type)) == NULL)
+		return (EINVAL);
+
+	/*
+	 * If this is a load, get the vdev guid from the nvlist.
+	 * Otherwise, vdev_alloc_common() will generate one for us.
+	 */
+	if (alloctype == VDEV_ALLOC_LOAD) {
+		uint64_t label_id;
+
+		if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) ||
+		    label_id != id)
+			return (EINVAL);
+
+		if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0)
+			return (EINVAL);
+	} else if (alloctype == VDEV_ALLOC_SPARE) {
+		if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0)
+			return (EINVAL);
+	} else if (alloctype == VDEV_ALLOC_L2CACHE) {
+		if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0)
+			return (EINVAL);
+	} else if (alloctype == VDEV_ALLOC_ROOTPOOL) {
+		if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0)
+			return (EINVAL);
+	}
+
+	/*
+	 * The first allocated vdev must be of type 'root'.
+	 */
+	if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL)
+		return (EINVAL);
+
+	/*
+	 * Determine whether we're a log vdev.
+	 */
+	islog = 0;
+	(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog);
+	if (islog && spa_version(spa) < SPA_VERSION_SLOGS)
+		return (ENOTSUP);
+
+	if (ops == &vdev_hole_ops && spa_version(spa) < SPA_VERSION_HOLES)
+		return (ENOTSUP);
+
+	/*
+	 * Set the nparity property for RAID-Z vdevs.
+	 */
+	nparity = -1ULL;
+	if (ops == &vdev_raidz_ops) {
+		if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY,
+		    &nparity) == 0) {
+			if (nparity == 0 || nparity > VDEV_RAIDZ_MAXPARITY)
+				return (EINVAL);
+			/*
+			 * Previous versions could only support 1 or 2 parity
+			 * device.
+			 */
+			if (nparity > 1 &&
+			    spa_version(spa) < SPA_VERSION_RAIDZ2)
+				return (ENOTSUP);
+			if (nparity > 2 &&
+			    spa_version(spa) < SPA_VERSION_RAIDZ3)
+				return (ENOTSUP);
+		} else {
+			/*
+			 * We require the parity to be specified for SPAs that
+			 * support multiple parity levels.
+			 */
+			if (spa_version(spa) >= SPA_VERSION_RAIDZ2)
+				return (EINVAL);
+			/*
+			 * Otherwise, we default to 1 parity device for RAID-Z.
+			 */
+			nparity = 1;
+		}
+	} else {
+		nparity = 0;
+	}
+	ASSERT(nparity != -1ULL);
+
+	vd = vdev_alloc_common(spa, id, guid, ops);
+
+	vd->vdev_islog = islog;
+	vd->vdev_nparity = nparity;
+
+	if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0)
+		vd->vdev_path = spa_strdup(vd->vdev_path);
+	if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0)
+		vd->vdev_devid = spa_strdup(vd->vdev_devid);
+	if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH,
+	    &vd->vdev_physpath) == 0)
+		vd->vdev_physpath = spa_strdup(vd->vdev_physpath);
+	if (nvlist_lookup_string(nv, ZPOOL_CONFIG_FRU, &vd->vdev_fru) == 0)
+		vd->vdev_fru = spa_strdup(vd->vdev_fru);
+
+	/*
+	 * Set the whole_disk property.  If it's not specified, leave the value
+	 * as -1.
+	 */
+	if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK,
+	    &vd->vdev_wholedisk) != 0)
+		vd->vdev_wholedisk = -1ULL;
+
+	/*
+	 * Look for the 'not present' flag.  This will only be set if the device
+	 * was not present at the time of import.
+	 */
+	(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT,
+	    &vd->vdev_not_present);
+
+	/*
+	 * Get the alignment requirement.
+	 */
+	(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift);
+
+	/*
+	 * Retrieve the vdev creation time.
+	 */
+	(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_CREATE_TXG,
+	    &vd->vdev_crtxg);
+
+	/*
+	 * If we're a top-level vdev, try to load the allocation parameters.
+	 */
+	if (parent && !parent->vdev_parent &&
+	    (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_SPLIT)) {
+		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY,
+		    &vd->vdev_ms_array);
+		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT,
+		    &vd->vdev_ms_shift);
+		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE,
+		    &vd->vdev_asize);
+		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVING,
+		    &vd->vdev_removing);
+	}
+
+	if (parent && !parent->vdev_parent) {
+		ASSERT(alloctype == VDEV_ALLOC_LOAD ||
+		    alloctype == VDEV_ALLOC_ADD ||
+		    alloctype == VDEV_ALLOC_SPLIT ||
+		    alloctype == VDEV_ALLOC_ROOTPOOL);
+		vd->vdev_mg = metaslab_group_create(islog ?
+		    spa_log_class(spa) : spa_normal_class(spa), vd);
+	}
+
+	/*
+	 * If we're a leaf vdev, try to load the DTL object and other state.
+	 */
+	if (vd->vdev_ops->vdev_op_leaf &&
+	    (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE ||
+	    alloctype == VDEV_ALLOC_ROOTPOOL)) {
+		if (alloctype == VDEV_ALLOC_LOAD) {
+			(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL,
+			    &vd->vdev_dtl_smo.smo_object);
+			(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE,
+			    &vd->vdev_unspare);
+		}
+
+		if (alloctype == VDEV_ALLOC_ROOTPOOL) {
+			uint64_t spare = 0;
+
+			if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE,
+			    &spare) == 0 && spare)
+				spa_spare_add(vd);
+		}
+
+		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE,
+		    &vd->vdev_offline);
+
+		(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_RESILVERING,
+		    &vd->vdev_resilvering);
+
+		/*
+		 * When importing a pool, we want to ignore the persistent fault
+		 * state, as the diagnosis made on another system may not be
+		 * valid in the current context.  Local vdevs will
+		 * remain in the faulted state.
+		 */
+		if (spa_load_state(spa) == SPA_LOAD_OPEN) {
+			(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED,
+			    &vd->vdev_faulted);
+			(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED,
+			    &vd->vdev_degraded);
+			(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED,
+			    &vd->vdev_removed);
+
+			if (vd->vdev_faulted || vd->vdev_degraded) {
+				char *aux;
+
+				vd->vdev_label_aux =
+				    VDEV_AUX_ERR_EXCEEDED;
+				if (nvlist_lookup_string(nv,
+				    ZPOOL_CONFIG_AUX_STATE, &aux) == 0 &&
+				    strcmp(aux, "external") == 0)
+					vd->vdev_label_aux = VDEV_AUX_EXTERNAL;
+			}
+		}
+	}
+
+	/*
+	 * Add ourselves to the parent's list of children.
+	 */
+	vdev_add_child(parent, vd);
+
+	*vdp = vd;
+
+	return (0);
+}
+
+void
+vdev_free(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+
+	/*
+	 * vdev_free() implies closing the vdev first.  This is simpler than
+	 * trying to ensure complicated semantics for all callers.
+	 */
+	vdev_close(vd);
+
+	ASSERT(!list_link_active(&vd->vdev_config_dirty_node));
+	ASSERT(!list_link_active(&vd->vdev_state_dirty_node));
+
+	/*
+	 * Free all children.
+	 */
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_free(vd->vdev_child[c]);
+
+	ASSERT(vd->vdev_child == NULL);
+	ASSERT(vd->vdev_guid_sum == vd->vdev_guid);
+
+	/*
+	 * Discard allocation state.
+	 */
+	if (vd->vdev_mg != NULL) {
+		vdev_metaslab_fini(vd);
+		metaslab_group_destroy(vd->vdev_mg);
+	}
+
+	ASSERT3U(vd->vdev_stat.vs_space, ==, 0);
+	ASSERT3U(vd->vdev_stat.vs_dspace, ==, 0);
+	ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0);
+
+	/*
+	 * Remove this vdev from its parent's child list.
+	 */
+	vdev_remove_child(vd->vdev_parent, vd);
+
+	ASSERT(vd->vdev_parent == NULL);
+
+	/*
+	 * Clean up vdev structure.
+	 */
+	vdev_queue_fini(vd);
+	vdev_cache_fini(vd);
+
+	if (vd->vdev_path)
+		spa_strfree(vd->vdev_path);
+	if (vd->vdev_devid)
+		spa_strfree(vd->vdev_devid);
+	if (vd->vdev_physpath)
+		spa_strfree(vd->vdev_physpath);
+	if (vd->vdev_fru)
+		spa_strfree(vd->vdev_fru);
+
+	if (vd->vdev_isspare)
+		spa_spare_remove(vd);
+	if (vd->vdev_isl2cache)
+		spa_l2cache_remove(vd);
+
+	txg_list_destroy(&vd->vdev_ms_list);
+	txg_list_destroy(&vd->vdev_dtl_list);
+
+	mutex_enter(&vd->vdev_dtl_lock);
+	for (int t = 0; t < DTL_TYPES; t++) {
+		space_map_unload(&vd->vdev_dtl[t]);
+		space_map_destroy(&vd->vdev_dtl[t]);
+	}
+	mutex_exit(&vd->vdev_dtl_lock);
+
+	mutex_destroy(&vd->vdev_dtl_lock);
+	mutex_destroy(&vd->vdev_stat_lock);
+	mutex_destroy(&vd->vdev_probe_lock);
+
+	if (vd == spa->spa_root_vdev)
+		spa->spa_root_vdev = NULL;
+
+	kmem_free(vd, sizeof (vdev_t));
+}
+
+/*
+ * Transfer top-level vdev state from svd to tvd.
+ */
+static void
+vdev_top_transfer(vdev_t *svd, vdev_t *tvd)
+{
+	spa_t *spa = svd->vdev_spa;
+	metaslab_t *msp;
+	vdev_t *vd;
+	int t;
+
+	ASSERT(tvd == tvd->vdev_top);
+
+	tvd->vdev_ms_array = svd->vdev_ms_array;
+	tvd->vdev_ms_shift = svd->vdev_ms_shift;
+	tvd->vdev_ms_count = svd->vdev_ms_count;
+
+	svd->vdev_ms_array = 0;
+	svd->vdev_ms_shift = 0;
+	svd->vdev_ms_count = 0;
+
+	tvd->vdev_mg = svd->vdev_mg;
+	tvd->vdev_ms = svd->vdev_ms;
+
+	svd->vdev_mg = NULL;
+	svd->vdev_ms = NULL;
+
+	if (tvd->vdev_mg != NULL)
+		tvd->vdev_mg->mg_vd = tvd;
+
+	tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc;
+	tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space;
+	tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace;
+
+	svd->vdev_stat.vs_alloc = 0;
+	svd->vdev_stat.vs_space = 0;
+	svd->vdev_stat.vs_dspace = 0;
+
+	for (t = 0; t < TXG_SIZE; t++) {
+		while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL)
+			(void) txg_list_add(&tvd->vdev_ms_list, msp, t);
+		while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL)
+			(void) txg_list_add(&tvd->vdev_dtl_list, vd, t);
+		if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t))
+			(void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t);
+	}
+
+	if (list_link_active(&svd->vdev_config_dirty_node)) {
+		vdev_config_clean(svd);
+		vdev_config_dirty(tvd);
+	}
+
+	if (list_link_active(&svd->vdev_state_dirty_node)) {
+		vdev_state_clean(svd);
+		vdev_state_dirty(tvd);
+	}
+
+	tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio;
+	svd->vdev_deflate_ratio = 0;
+
+	tvd->vdev_islog = svd->vdev_islog;
+	svd->vdev_islog = 0;
+}
+
+static void
+vdev_top_update(vdev_t *tvd, vdev_t *vd)
+{
+	if (vd == NULL)
+		return;
+
+	vd->vdev_top = tvd;
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_top_update(tvd, vd->vdev_child[c]);
+}
+
+/*
+ * Add a mirror/replacing vdev above an existing vdev.
+ */
+vdev_t *
+vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops)
+{
+	spa_t *spa = cvd->vdev_spa;
+	vdev_t *pvd = cvd->vdev_parent;
+	vdev_t *mvd;
+
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+
+	mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops);
+
+	mvd->vdev_asize = cvd->vdev_asize;
+	mvd->vdev_min_asize = cvd->vdev_min_asize;
+	mvd->vdev_ashift = cvd->vdev_ashift;
+	mvd->vdev_state = cvd->vdev_state;
+	mvd->vdev_crtxg = cvd->vdev_crtxg;
+
+	vdev_remove_child(pvd, cvd);
+	vdev_add_child(pvd, mvd);
+	cvd->vdev_id = mvd->vdev_children;
+	vdev_add_child(mvd, cvd);
+	vdev_top_update(cvd->vdev_top, cvd->vdev_top);
+
+	if (mvd == mvd->vdev_top)
+		vdev_top_transfer(cvd, mvd);
+
+	return (mvd);
+}
+
+/*
+ * Remove a 1-way mirror/replacing vdev from the tree.
+ */
+void
+vdev_remove_parent(vdev_t *cvd)
+{
+	vdev_t *mvd = cvd->vdev_parent;
+	vdev_t *pvd = mvd->vdev_parent;
+
+	ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+
+	ASSERT(mvd->vdev_children == 1);
+	ASSERT(mvd->vdev_ops == &vdev_mirror_ops ||
+	    mvd->vdev_ops == &vdev_replacing_ops ||
+	    mvd->vdev_ops == &vdev_spare_ops);
+	cvd->vdev_ashift = mvd->vdev_ashift;
+
+	vdev_remove_child(mvd, cvd);
+	vdev_remove_child(pvd, mvd);
+
+	/*
+	 * If cvd will replace mvd as a top-level vdev, preserve mvd's guid.
+	 * Otherwise, we could have detached an offline device, and when we
+	 * go to import the pool we'll think we have two top-level vdevs,
+	 * instead of a different version of the same top-level vdev.
+	 */
+	if (mvd->vdev_top == mvd) {
+		uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid;
+		cvd->vdev_orig_guid = cvd->vdev_guid;
+		cvd->vdev_guid += guid_delta;
+		cvd->vdev_guid_sum += guid_delta;
+	}
+	cvd->vdev_id = mvd->vdev_id;
+	vdev_add_child(pvd, cvd);
+	vdev_top_update(cvd->vdev_top, cvd->vdev_top);
+
+	if (cvd == cvd->vdev_top)
+		vdev_top_transfer(mvd, cvd);
+
+	ASSERT(mvd->vdev_children == 0);
+	vdev_free(mvd);
+}
+
+int
+vdev_metaslab_init(vdev_t *vd, uint64_t txg)
+{
+	spa_t *spa = vd->vdev_spa;
+	objset_t *mos = spa->spa_meta_objset;
+	uint64_t m;
+	uint64_t oldc = vd->vdev_ms_count;
+	uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift;
+	metaslab_t **mspp;
+	int error;
+
+	ASSERT(txg == 0 || spa_config_held(spa, SCL_ALLOC, RW_WRITER));
+
+	/*
+	 * This vdev is not being allocated from yet or is a hole.
+	 */
+	if (vd->vdev_ms_shift == 0)
+		return (0);
+
+	ASSERT(!vd->vdev_ishole);
+
+	/*
+	 * Compute the raidz-deflation ratio.  Note, we hard-code
+	 * in 128k (1 << 17) because it is the current "typical" blocksize.
+	 * Even if SPA_MAXBLOCKSIZE changes, this algorithm must never change,
+	 * or we will inconsistently account for existing bp's.
+	 */
+	vd->vdev_deflate_ratio = (1 << 17) /
+	    (vdev_psize_to_asize(vd, 1 << 17) >> SPA_MINBLOCKSHIFT);
+
+	ASSERT(oldc <= newc);
+
+	mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP);
+
+	if (oldc != 0) {
+		bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp));
+		kmem_free(vd->vdev_ms, oldc * sizeof (*mspp));
+	}
+
+	vd->vdev_ms = mspp;
+	vd->vdev_ms_count = newc;
+
+	for (m = oldc; m < newc; m++) {
+		space_map_obj_t smo = { 0, 0, 0 };
+		if (txg == 0) {
+			uint64_t object = 0;
+			error = dmu_read(mos, vd->vdev_ms_array,
+			    m * sizeof (uint64_t), sizeof (uint64_t), &object,
+			    DMU_READ_PREFETCH);
+			if (error)
+				return (error);
+			if (object != 0) {
+				dmu_buf_t *db;
+				error = dmu_bonus_hold(mos, object, FTAG, &db);
+				if (error)
+					return (error);
+				ASSERT3U(db->db_size, >=, sizeof (smo));
+				bcopy(db->db_data, &smo, sizeof (smo));
+				ASSERT3U(smo.smo_object, ==, object);
+				dmu_buf_rele(db, FTAG);
+			}
+		}
+		vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo,
+		    m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg);
+	}
+
+	if (txg == 0)
+		spa_config_enter(spa, SCL_ALLOC, FTAG, RW_WRITER);
+
+	/*
+	 * If the vdev is being removed we don't activate
+	 * the metaslabs since we want to ensure that no new
+	 * allocations are performed on this device.
+	 */
+	if (oldc == 0 && !vd->vdev_removing)
+		metaslab_group_activate(vd->vdev_mg);
+
+	if (txg == 0)
+		spa_config_exit(spa, SCL_ALLOC, FTAG);
+
+	return (0);
+}
+
+void
+vdev_metaslab_fini(vdev_t *vd)
+{
+	uint64_t m;
+	uint64_t count = vd->vdev_ms_count;
+
+	if (vd->vdev_ms != NULL) {
+		metaslab_group_passivate(vd->vdev_mg);
+		for (m = 0; m < count; m++)
+			if (vd->vdev_ms[m] != NULL)
+				metaslab_fini(vd->vdev_ms[m]);
+		kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *));
+		vd->vdev_ms = NULL;
+	}
+}
+
+typedef struct vdev_probe_stats {
+	boolean_t	vps_readable;
+	boolean_t	vps_writeable;
+	int		vps_flags;
+} vdev_probe_stats_t;
+
+static void
+vdev_probe_done(zio_t *zio)
+{
+	spa_t *spa = zio->io_spa;
+	vdev_t *vd = zio->io_vd;
+	vdev_probe_stats_t *vps = zio->io_private;
+
+	ASSERT(vd->vdev_probe_zio != NULL);
+
+	if (zio->io_type == ZIO_TYPE_READ) {
+		if (zio->io_error == 0)
+			vps->vps_readable = 1;
+		if (zio->io_error == 0 && spa_writeable(spa)) {
+			zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd,
+			    zio->io_offset, zio->io_size, zio->io_data,
+			    ZIO_CHECKSUM_OFF, vdev_probe_done, vps,
+			    ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE));
+		} else {
+			zio_buf_free(zio->io_data, zio->io_size);
+		}
+	} else if (zio->io_type == ZIO_TYPE_WRITE) {
+		if (zio->io_error == 0)
+			vps->vps_writeable = 1;
+		zio_buf_free(zio->io_data, zio->io_size);
+	} else if (zio->io_type == ZIO_TYPE_NULL) {
+		zio_t *pio;
+
+		vd->vdev_cant_read |= !vps->vps_readable;
+		vd->vdev_cant_write |= !vps->vps_writeable;
+
+		if (vdev_readable(vd) &&
+		    (vdev_writeable(vd) || !spa_writeable(spa))) {
+			zio->io_error = 0;
+		} else {
+			ASSERT(zio->io_error != 0);
+			zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE,
+			    spa, vd, NULL, 0, 0);
+			zio->io_error = ENXIO;
+		}
+
+		mutex_enter(&vd->vdev_probe_lock);
+		ASSERT(vd->vdev_probe_zio == zio);
+		vd->vdev_probe_zio = NULL;
+		mutex_exit(&vd->vdev_probe_lock);
+
+		while ((pio = zio_walk_parents(zio)) != NULL)
+			if (!vdev_accessible(vd, pio))
+				pio->io_error = ENXIO;
+
+		kmem_free(vps, sizeof (*vps));
+	}
+}
+
+/*
+ * Determine whether this device is accessible by reading and writing
+ * to several known locations: the pad regions of each vdev label
+ * but the first (which we leave alone in case it contains a VTOC).
+ */
+zio_t *
+vdev_probe(vdev_t *vd, zio_t *zio)
+{
+	spa_t *spa = vd->vdev_spa;
+	vdev_probe_stats_t *vps = NULL;
+	zio_t *pio;
+
+	ASSERT(vd->vdev_ops->vdev_op_leaf);
+
+	/*
+	 * Don't probe the probe.
+	 */
+	if (zio && (zio->io_flags & ZIO_FLAG_PROBE))
+		return (NULL);
+
+	/*
+	 * To prevent 'probe storms' when a device fails, we create
+	 * just one probe i/o at a time.  All zios that want to probe
+	 * this vdev will become parents of the probe io.
+	 */
+	mutex_enter(&vd->vdev_probe_lock);
+
+	if ((pio = vd->vdev_probe_zio) == NULL) {
+		vps = kmem_zalloc(sizeof (*vps), KM_SLEEP);
+
+		vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE |
+		    ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE |
+		    ZIO_FLAG_TRYHARD;
+
+		if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) {
+			/*
+			 * vdev_cant_read and vdev_cant_write can only
+			 * transition from TRUE to FALSE when we have the
+			 * SCL_ZIO lock as writer; otherwise they can only
+			 * transition from FALSE to TRUE.  This ensures that
+			 * any zio looking at these values can assume that
+			 * failures persist for the life of the I/O.  That's
+			 * important because when a device has intermittent
+			 * connectivity problems, we want to ensure that
+			 * they're ascribed to the device (ENXIO) and not
+			 * the zio (EIO).
+			 *
+			 * Since we hold SCL_ZIO as writer here, clear both
+			 * values so the probe can reevaluate from first
+			 * principles.
+			 */
+			vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER;
+			vd->vdev_cant_read = B_FALSE;
+			vd->vdev_cant_write = B_FALSE;
+		}
+
+		vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd,
+		    vdev_probe_done, vps,
+		    vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE);
+
+		/*
+		 * We can't change the vdev state in this context, so we
+		 * kick off an async task to do it on our behalf.
+		 */
+		if (zio != NULL) {
+			vd->vdev_probe_wanted = B_TRUE;
+			spa_async_request(spa, SPA_ASYNC_PROBE);
+		}
+	}
+
+	if (zio != NULL)
+		zio_add_child(zio, pio);
+
+	mutex_exit(&vd->vdev_probe_lock);
+
+	if (vps == NULL) {
+		ASSERT(zio != NULL);
+		return (NULL);
+	}
+
+	for (int l = 1; l < VDEV_LABELS; l++) {
+		zio_nowait(zio_read_phys(pio, vd,
+		    vdev_label_offset(vd->vdev_psize, l,
+		    offsetof(vdev_label_t, vl_pad2)),
+		    VDEV_PAD_SIZE, zio_buf_alloc(VDEV_PAD_SIZE),
+		    ZIO_CHECKSUM_OFF, vdev_probe_done, vps,
+		    ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE));
+	}
+
+	if (zio == NULL)
+		return (pio);
+
+	zio_nowait(pio);
+	return (NULL);
+}
+
+static void
+vdev_open_child(void *arg)
+{
+	vdev_t *vd = arg;
+
+	vd->vdev_open_thread = curthread;
+	vd->vdev_open_error = vdev_open(vd);
+	vd->vdev_open_thread = NULL;
+}
+
+boolean_t
+vdev_uses_zvols(vdev_t *vd)
+{
+	if (vd->vdev_path && strncmp(vd->vdev_path, ZVOL_DIR,
+	    strlen(ZVOL_DIR)) == 0)
+		return (B_TRUE);
+	for (int c = 0; c < vd->vdev_children; c++)
+		if (vdev_uses_zvols(vd->vdev_child[c]))
+			return (B_TRUE);
+	return (B_FALSE);
+}
+
+void
+vdev_open_children(vdev_t *vd)
+{
+	taskq_t *tq;
+	int children = vd->vdev_children;
+
+	/*
+	 * in order to handle pools on top of zvols, do the opens
+	 * in a single thread so that the same thread holds the
+	 * spa_namespace_lock
+	 */
+	if (vdev_uses_zvols(vd)) {
+		for (int c = 0; c < children; c++)
+			vd->vdev_child[c]->vdev_open_error =
+			    vdev_open(vd->vdev_child[c]);
+		return;
+	}
+	tq = taskq_create("vdev_open", children, minclsyspri,
+	    children, children, TASKQ_PREPOPULATE);
+
+	for (int c = 0; c < children; c++)
+		VERIFY(taskq_dispatch(tq, vdev_open_child, vd->vdev_child[c],
+		    TQ_SLEEP) != NULL);
+
+	taskq_destroy(tq);
+}
+
+/*
+ * Prepare a virtual device for access.
+ */
+int
+vdev_open(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+	int error;
+	uint64_t osize = 0;
+	uint64_t asize, psize;
+	uint64_t ashift = 0;
+
+	ASSERT(vd->vdev_open_thread == curthread ||
+	    spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
+	ASSERT(vd->vdev_state == VDEV_STATE_CLOSED ||
+	    vd->vdev_state == VDEV_STATE_CANT_OPEN ||
+	    vd->vdev_state == VDEV_STATE_OFFLINE);
+
+	vd->vdev_stat.vs_aux = VDEV_AUX_NONE;
+	vd->vdev_cant_read = B_FALSE;
+	vd->vdev_cant_write = B_FALSE;
+	vd->vdev_min_asize = vdev_get_min_asize(vd);
+
+	/*
+	 * If this vdev is not removed, check its fault status.  If it's
+	 * faulted, bail out of the open.
+	 */
+	if (!vd->vdev_removed && vd->vdev_faulted) {
+		ASSERT(vd->vdev_children == 0);
+		ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED ||
+		    vd->vdev_label_aux == VDEV_AUX_EXTERNAL);
+		vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED,
+		    vd->vdev_label_aux);
+		return (ENXIO);
+	} else if (vd->vdev_offline) {
+		ASSERT(vd->vdev_children == 0);
+		vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE);
+		return (ENXIO);
+	}
+
+	error = vd->vdev_ops->vdev_op_open(vd, &osize, &ashift);
+
+	/*
+	 * Reset the vdev_reopening flag so that we actually close
+	 * the vdev on error.
+	 */
+	vd->vdev_reopening = B_FALSE;
+	if (zio_injection_enabled && error == 0)
+		error = zio_handle_device_injection(vd, NULL, ENXIO);
+
+	if (error) {
+		if (vd->vdev_removed &&
+		    vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED)
+			vd->vdev_removed = B_FALSE;
+
+		vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
+		    vd->vdev_stat.vs_aux);
+		return (error);
+	}
+
+	vd->vdev_removed = B_FALSE;
+
+	/*
+	 * Recheck the faulted flag now that we have confirmed that
+	 * the vdev is accessible.  If we're faulted, bail.
+	 */
+	if (vd->vdev_faulted) {
+		ASSERT(vd->vdev_children == 0);
+		ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED ||
+		    vd->vdev_label_aux == VDEV_AUX_EXTERNAL);
+		vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED,
+		    vd->vdev_label_aux);
+		return (ENXIO);
+	}
+
+	if (vd->vdev_degraded) {
+		ASSERT(vd->vdev_children == 0);
+		vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED,
+		    VDEV_AUX_ERR_EXCEEDED);
+	} else {
+		vdev_set_state(vd, B_TRUE, VDEV_STATE_HEALTHY, 0);
+	}
+
+	/*
+	 * For hole or missing vdevs we just return success.
+	 */
+	if (vd->vdev_ishole || vd->vdev_ops == &vdev_missing_ops)
+		return (0);
+
+	for (int c = 0; c < vd->vdev_children; c++) {
+		if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) {
+			vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED,
+			    VDEV_AUX_NONE);
+			break;
+		}
+	}
+
+	osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t));
+
+	if (vd->vdev_children == 0) {
+		if (osize < SPA_MINDEVSIZE) {
+			vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
+			    VDEV_AUX_TOO_SMALL);
+			return (EOVERFLOW);
+		}
+		psize = osize;
+		asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE);
+	} else {
+		if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE -
+		    (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) {
+			vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
+			    VDEV_AUX_TOO_SMALL);
+			return (EOVERFLOW);
+		}
+		psize = 0;
+		asize = osize;
+	}
+
+	vd->vdev_psize = psize;
+
+	/*
+	 * Make sure the allocatable size hasn't shrunk.
+	 */
+	if (asize < vd->vdev_min_asize) {
+		vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
+		    VDEV_AUX_BAD_LABEL);
+		return (EINVAL);
+	}
+
+	if (vd->vdev_asize == 0) {
+		/*
+		 * This is the first-ever open, so use the computed values.
+		 * For testing purposes, a higher ashift can be requested.
+		 */
+		vd->vdev_asize = asize;
+		vd->vdev_ashift = MAX(ashift, vd->vdev_ashift);
+	} else {
+		/*
+		 * Make sure the alignment requirement hasn't increased.
+		 */
+		if (ashift > vd->vdev_top->vdev_ashift) {
+			vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
+			    VDEV_AUX_BAD_LABEL);
+			return (EINVAL);
+		}
+	}
+
+	/*
+	 * If all children are healthy and the asize has increased,
+	 * then we've experienced dynamic LUN growth.  If automatic
+	 * expansion is enabled then use the additional space.
+	 */
+	if (vd->vdev_state == VDEV_STATE_HEALTHY && asize > vd->vdev_asize &&
+	    (vd->vdev_expanding || spa->spa_autoexpand))
+		vd->vdev_asize = asize;
+
+	vdev_set_min_asize(vd);
+
+	/*
+	 * Ensure we can issue some IO before declaring the
+	 * vdev open for business.
+	 */
+	if (vd->vdev_ops->vdev_op_leaf &&
+	    (error = zio_wait(vdev_probe(vd, NULL))) != 0) {
+		vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED,
+		    VDEV_AUX_ERR_EXCEEDED);
+		return (error);
+	}
+
+	/*
+	 * If a leaf vdev has a DTL, and seems healthy, then kick off a
+	 * resilver.  But don't do this if we are doing a reopen for a scrub,
+	 * since this would just restart the scrub we are already doing.
+	 */
+	if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen &&
+	    vdev_resilver_needed(vd, NULL, NULL))
+		spa_async_request(spa, SPA_ASYNC_RESILVER);
+
+	return (0);
+}
+
+/*
+ * Called once the vdevs are all opened, this routine validates the label
+ * contents.  This needs to be done before vdev_load() so that we don't
+ * inadvertently do repair I/Os to the wrong device.
+ *
+ * This function will only return failure if one of the vdevs indicates that it
+ * has since been destroyed or exported.  This is only possible if
+ * /etc/zfs/zpool.cache was readonly at the time.  Otherwise, the vdev state
+ * will be updated but the function will return 0.
+ */
+int
+vdev_validate(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+	nvlist_t *label;
+	uint64_t guid = 0, top_guid;
+	uint64_t state;
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		if (vdev_validate(vd->vdev_child[c]) != 0)
+			return (EBADF);
+
+	/*
+	 * If the device has already failed, or was marked offline, don't do
+	 * any further validation.  Otherwise, label I/O will fail and we will
+	 * overwrite the previous state.
+	 */
+	if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) {
+		uint64_t aux_guid = 0;
+		nvlist_t *nvl;
+
+		if ((label = vdev_label_read_config(vd)) == NULL) {
+			vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
+			    VDEV_AUX_BAD_LABEL);
+			return (0);
+		}
+
+		/*
+		 * Determine if this vdev has been split off into another
+		 * pool.  If so, then refuse to open it.
+		 */
+		if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_SPLIT_GUID,
+		    &aux_guid) == 0 && aux_guid == spa_guid(spa)) {
+			vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
+			    VDEV_AUX_SPLIT_POOL);
+			nvlist_free(label);
+			return (0);
+		}
+
+		if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID,
+		    &guid) != 0 || guid != spa_guid(spa)) {
+			vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
+			    VDEV_AUX_CORRUPT_DATA);
+			nvlist_free(label);
+			return (0);
+		}
+
+		if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvl)
+		    != 0 || nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_ORIG_GUID,
+		    &aux_guid) != 0)
+			aux_guid = 0;
+
+		/*
+		 * If this vdev just became a top-level vdev because its
+		 * sibling was detached, it will have adopted the parent's
+		 * vdev guid -- but the label may or may not be on disk yet.
+		 * Fortunately, either version of the label will have the
+		 * same top guid, so if we're a top-level vdev, we can
+		 * safely compare to that instead.
+		 *
+		 * If we split this vdev off instead, then we also check the
+		 * original pool's guid.  We don't want to consider the vdev
+		 * corrupt if it is partway through a split operation.
+		 */
+		if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID,
+		    &guid) != 0 ||
+		    nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID,
+		    &top_guid) != 0 ||
+		    ((vd->vdev_guid != guid && vd->vdev_guid != aux_guid) &&
+		    (vd->vdev_guid != top_guid || vd != vd->vdev_top))) {
+			vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
+			    VDEV_AUX_CORRUPT_DATA);
+			nvlist_free(label);
+			return (0);
+		}
+
+		if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE,
+		    &state) != 0) {
+			vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
+			    VDEV_AUX_CORRUPT_DATA);
+			nvlist_free(label);
+			return (0);
+		}
+
+		nvlist_free(label);
+
+		/*
+		 * If this is a verbatim import, no need to check the
+		 * state of the pool.
+		 */
+		if (!(spa->spa_import_flags & ZFS_IMPORT_VERBATIM) &&
+		    spa_load_state(spa) == SPA_LOAD_OPEN &&
+		    state != POOL_STATE_ACTIVE)
+			return (EBADF);
+
+		/*
+		 * If we were able to open and validate a vdev that was
+		 * previously marked permanently unavailable, clear that state
+		 * now.
+		 */
+		if (vd->vdev_not_present)
+			vd->vdev_not_present = 0;
+	}
+
+	return (0);
+}
+
+/*
+ * Close a virtual device.
+ */
+void
+vdev_close(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+	vdev_t *pvd = vd->vdev_parent;
+
+	ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
+
+	/*
+	 * If our parent is reopening, then we are as well, unless we are
+	 * going offline.
+	 */
+	if (pvd != NULL && pvd->vdev_reopening)
+		vd->vdev_reopening = (pvd->vdev_reopening && !vd->vdev_offline);
+
+	vd->vdev_ops->vdev_op_close(vd);
+
+	vdev_cache_purge(vd);
+
+	/*
+	 * We record the previous state before we close it, so that if we are
+	 * doing a reopen(), we don't generate FMA ereports if we notice that
+	 * it's still faulted.
+	 */
+	vd->vdev_prevstate = vd->vdev_state;
+
+	if (vd->vdev_offline)
+		vd->vdev_state = VDEV_STATE_OFFLINE;
+	else
+		vd->vdev_state = VDEV_STATE_CLOSED;
+	vd->vdev_stat.vs_aux = VDEV_AUX_NONE;
+}
+
+void
+vdev_hold(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+
+	ASSERT(spa_is_root(spa));
+	if (spa->spa_state == POOL_STATE_UNINITIALIZED)
+		return;
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_hold(vd->vdev_child[c]);
+
+	if (vd->vdev_ops->vdev_op_leaf)
+		vd->vdev_ops->vdev_op_hold(vd);
+}
+
+void
+vdev_rele(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+
+	ASSERT(spa_is_root(spa));
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_rele(vd->vdev_child[c]);
+
+	if (vd->vdev_ops->vdev_op_leaf)
+		vd->vdev_ops->vdev_op_rele(vd);
+}
+
+/*
+ * Reopen all interior vdevs and any unopened leaves.  We don't actually
+ * reopen leaf vdevs which had previously been opened as they might deadlock
+ * on the spa_config_lock.  Instead we only obtain the leaf's physical size.
+ * If the leaf has never been opened then open it, as usual.
+ */
+void
+vdev_reopen(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+
+	ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
+
+	/* set the reopening flag unless we're taking the vdev offline */
+	vd->vdev_reopening = !vd->vdev_offline;
+	vdev_close(vd);
+	(void) vdev_open(vd);
+
+	/*
+	 * Call vdev_validate() here to make sure we have the same device.
+	 * Otherwise, a device with an invalid label could be successfully
+	 * opened in response to vdev_reopen().
+	 */
+	if (vd->vdev_aux) {
+		(void) vdev_validate_aux(vd);
+		if (vdev_readable(vd) && vdev_writeable(vd) &&
+		    vd->vdev_aux == &spa->spa_l2cache &&
+		    !l2arc_vdev_present(vd))
+			l2arc_add_vdev(spa, vd);
+	} else {
+		(void) vdev_validate(vd);
+	}
+
+	/*
+	 * Reassess parent vdev's health.
+	 */
+	vdev_propagate_state(vd);
+}
+
+int
+vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing)
+{
+	int error;
+
+	/*
+	 * Normally, partial opens (e.g. of a mirror) are allowed.
+	 * For a create, however, we want to fail the request if
+	 * there are any components we can't open.
+	 */
+	error = vdev_open(vd);
+
+	if (error || vd->vdev_state != VDEV_STATE_HEALTHY) {
+		vdev_close(vd);
+		return (error ? error : ENXIO);
+	}
+
+	/*
+	 * Recursively initialize all labels.
+	 */
+	if ((error = vdev_label_init(vd, txg, isreplacing ?
+	    VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) {
+		vdev_close(vd);
+		return (error);
+	}
+
+	return (0);
+}
+
+void
+vdev_metaslab_set_size(vdev_t *vd)
+{
+	/*
+	 * Aim for roughly 200 metaslabs per vdev.
+	 */
+	vd->vdev_ms_shift = highbit(vd->vdev_asize / 200);
+	vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT);
+}
+
+void
+vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg)
+{
+	ASSERT(vd == vd->vdev_top);
+	ASSERT(!vd->vdev_ishole);
+	ASSERT(ISP2(flags));
+	ASSERT(spa_writeable(vd->vdev_spa));
+
+	if (flags & VDD_METASLAB)
+		(void) txg_list_add(&vd->vdev_ms_list, arg, txg);
+
+	if (flags & VDD_DTL)
+		(void) txg_list_add(&vd->vdev_dtl_list, arg, txg);
+
+	(void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg);
+}
+
+/*
+ * DTLs.
+ *
+ * A vdev's DTL (dirty time log) is the set of transaction groups for which
+ * the vdev has less than perfect replication.  There are four kinds of DTL:
+ *
+ * DTL_MISSING: txgs for which the vdev has no valid copies of the data
+ *
+ * DTL_PARTIAL: txgs for which data is available, but not fully replicated
+ *
+ * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon
+ *	scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of
+ *	txgs that was scrubbed.
+ *
+ * DTL_OUTAGE: txgs which cannot currently be read, whether due to
+ *	persistent errors or just some device being offline.
+ *	Unlike the other three, the DTL_OUTAGE map is not generally
+ *	maintained; it's only computed when needed, typically to
+ *	determine whether a device can be detached.
+ *
+ * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device
+ * either has the data or it doesn't.
+ *
+ * For interior vdevs such as mirror and RAID-Z the picture is more complex.
+ * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because
+ * if any child is less than fully replicated, then so is its parent.
+ * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs,
+ * comprising only those txgs which appear in 'maxfaults' or more children;
+ * those are the txgs we don't have enough replication to read.  For example,
+ * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2);
+ * thus, its DTL_MISSING consists of the set of txgs that appear in more than
+ * two child DTL_MISSING maps.
+ *
+ * It should be clear from the above that to compute the DTLs and outage maps
+ * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps.
+ * Therefore, that is all we keep on disk.  When loading the pool, or after
+ * a configuration change, we generate all other DTLs from first principles.
+ */
+void
+vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size)
+{
+	space_map_t *sm = &vd->vdev_dtl[t];
+
+	ASSERT(t < DTL_TYPES);
+	ASSERT(vd != vd->vdev_spa->spa_root_vdev);
+	ASSERT(spa_writeable(vd->vdev_spa));
+
+	mutex_enter(sm->sm_lock);
+	if (!space_map_contains(sm, txg, size))
+		space_map_add(sm, txg, size);
+	mutex_exit(sm->sm_lock);
+}
+
+boolean_t
+vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size)
+{
+	space_map_t *sm = &vd->vdev_dtl[t];
+	boolean_t dirty = B_FALSE;
+
+	ASSERT(t < DTL_TYPES);
+	ASSERT(vd != vd->vdev_spa->spa_root_vdev);
+
+	mutex_enter(sm->sm_lock);
+	if (sm->sm_space != 0)
+		dirty = space_map_contains(sm, txg, size);
+	mutex_exit(sm->sm_lock);
+
+	return (dirty);
+}
+
+boolean_t
+vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t)
+{
+	space_map_t *sm = &vd->vdev_dtl[t];
+	boolean_t empty;
+
+	mutex_enter(sm->sm_lock);
+	empty = (sm->sm_space == 0);
+	mutex_exit(sm->sm_lock);
+
+	return (empty);
+}
+
+/*
+ * Reassess DTLs after a config change or scrub completion.
+ */
+void
+vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done)
+{
+	spa_t *spa = vd->vdev_spa;
+	avl_tree_t reftree;
+	int minref;
+
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0);
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_dtl_reassess(vd->vdev_child[c], txg,
+		    scrub_txg, scrub_done);
+
+	if (vd == spa->spa_root_vdev || vd->vdev_ishole || vd->vdev_aux)
+		return;
+
+	if (vd->vdev_ops->vdev_op_leaf) {
+		dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan;
+
+		mutex_enter(&vd->vdev_dtl_lock);
+		if (scrub_txg != 0 &&
+		    (spa->spa_scrub_started ||
+		    (scn && scn->scn_phys.scn_errors == 0))) {
+			/*
+			 * We completed a scrub up to scrub_txg.  If we
+			 * did it without rebooting, then the scrub dtl
+			 * will be valid, so excise the old region and
+			 * fold in the scrub dtl.  Otherwise, leave the
+			 * dtl as-is if there was an error.
+			 *
+			 * There's little trick here: to excise the beginning
+			 * of the DTL_MISSING map, we put it into a reference
+			 * tree and then add a segment with refcnt -1 that
+			 * covers the range [0, scrub_txg).  This means
+			 * that each txg in that range has refcnt -1 or 0.
+			 * We then add DTL_SCRUB with a refcnt of 2, so that
+			 * entries in the range [0, scrub_txg) will have a
+			 * positive refcnt -- either 1 or 2.  We then convert
+			 * the reference tree into the new DTL_MISSING map.
+			 */
+			space_map_ref_create(&reftree);
+			space_map_ref_add_map(&reftree,
+			    &vd->vdev_dtl[DTL_MISSING], 1);
+			space_map_ref_add_seg(&reftree, 0, scrub_txg, -1);
+			space_map_ref_add_map(&reftree,
+			    &vd->vdev_dtl[DTL_SCRUB], 2);
+			space_map_ref_generate_map(&reftree,
+			    &vd->vdev_dtl[DTL_MISSING], 1);
+			space_map_ref_destroy(&reftree);
+		}
+		space_map_vacate(&vd->vdev_dtl[DTL_PARTIAL], NULL, NULL);
+		space_map_walk(&vd->vdev_dtl[DTL_MISSING],
+		    space_map_add, &vd->vdev_dtl[DTL_PARTIAL]);
+		if (scrub_done)
+			space_map_vacate(&vd->vdev_dtl[DTL_SCRUB], NULL, NULL);
+		space_map_vacate(&vd->vdev_dtl[DTL_OUTAGE], NULL, NULL);
+		if (!vdev_readable(vd))
+			space_map_add(&vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL);
+		else
+			space_map_walk(&vd->vdev_dtl[DTL_MISSING],
+			    space_map_add, &vd->vdev_dtl[DTL_OUTAGE]);
+		mutex_exit(&vd->vdev_dtl_lock);
+
+		if (txg != 0)
+			vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg);
+		return;
+	}
+
+	mutex_enter(&vd->vdev_dtl_lock);
+	for (int t = 0; t < DTL_TYPES; t++) {
+		/* account for child's outage in parent's missing map */
+		int s = (t == DTL_MISSING) ? DTL_OUTAGE: t;
+		if (t == DTL_SCRUB)
+			continue;			/* leaf vdevs only */
+		if (t == DTL_PARTIAL)
+			minref = 1;			/* i.e. non-zero */
+		else if (vd->vdev_nparity != 0)
+			minref = vd->vdev_nparity + 1;	/* RAID-Z */
+		else
+			minref = vd->vdev_children;	/* any kind of mirror */
+		space_map_ref_create(&reftree);
+		for (int c = 0; c < vd->vdev_children; c++) {
+			vdev_t *cvd = vd->vdev_child[c];
+			mutex_enter(&cvd->vdev_dtl_lock);
+			space_map_ref_add_map(&reftree, &cvd->vdev_dtl[s], 1);
+			mutex_exit(&cvd->vdev_dtl_lock);
+		}
+		space_map_ref_generate_map(&reftree, &vd->vdev_dtl[t], minref);
+		space_map_ref_destroy(&reftree);
+	}
+	mutex_exit(&vd->vdev_dtl_lock);
+}
+
+static int
+vdev_dtl_load(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+	space_map_obj_t *smo = &vd->vdev_dtl_smo;
+	objset_t *mos = spa->spa_meta_objset;
+	dmu_buf_t *db;
+	int error;
+
+	ASSERT(vd->vdev_children == 0);
+
+	if (smo->smo_object == 0)
+		return (0);
+
+	ASSERT(!vd->vdev_ishole);
+
+	if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0)
+		return (error);
+
+	ASSERT3U(db->db_size, >=, sizeof (*smo));
+	bcopy(db->db_data, smo, sizeof (*smo));
+	dmu_buf_rele(db, FTAG);
+
+	mutex_enter(&vd->vdev_dtl_lock);
+	error = space_map_load(&vd->vdev_dtl[DTL_MISSING],
+	    NULL, SM_ALLOC, smo, mos);
+	mutex_exit(&vd->vdev_dtl_lock);
+
+	return (error);
+}
+
+void
+vdev_dtl_sync(vdev_t *vd, uint64_t txg)
+{
+	spa_t *spa = vd->vdev_spa;
+	space_map_obj_t *smo = &vd->vdev_dtl_smo;
+	space_map_t *sm = &vd->vdev_dtl[DTL_MISSING];
+	objset_t *mos = spa->spa_meta_objset;
+	space_map_t smsync;
+	kmutex_t smlock;
+	dmu_buf_t *db;
+	dmu_tx_t *tx;
+
+	ASSERT(!vd->vdev_ishole);
+
+	tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg);
+
+	if (vd->vdev_detached) {
+		if (smo->smo_object != 0) {
+			int err = dmu_object_free(mos, smo->smo_object, tx);
+			ASSERT3U(err, ==, 0);
+			smo->smo_object = 0;
+		}
+		dmu_tx_commit(tx);
+		return;
+	}
+
+	if (smo->smo_object == 0) {
+		ASSERT(smo->smo_objsize == 0);
+		ASSERT(smo->smo_alloc == 0);
+		smo->smo_object = dmu_object_alloc(mos,
+		    DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT,
+		    DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx);
+		ASSERT(smo->smo_object != 0);
+		vdev_config_dirty(vd->vdev_top);
+	}
+
+	mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL);
+
+	space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift,
+	    &smlock);
+
+	mutex_enter(&smlock);
+
+	mutex_enter(&vd->vdev_dtl_lock);
+	space_map_walk(sm, space_map_add, &smsync);
+	mutex_exit(&vd->vdev_dtl_lock);
+
+	space_map_truncate(smo, mos, tx);
+	space_map_sync(&smsync, SM_ALLOC, smo, mos, tx);
+
+	space_map_destroy(&smsync);
+
+	mutex_exit(&smlock);
+	mutex_destroy(&smlock);
+
+	VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db));
+	dmu_buf_will_dirty(db, tx);
+	ASSERT3U(db->db_size, >=, sizeof (*smo));
+	bcopy(smo, db->db_data, sizeof (*smo));
+	dmu_buf_rele(db, FTAG);
+
+	dmu_tx_commit(tx);
+}
+
+/*
+ * Determine whether the specified vdev can be offlined/detached/removed
+ * without losing data.
+ */
+boolean_t
+vdev_dtl_required(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+	vdev_t *tvd = vd->vdev_top;
+	uint8_t cant_read = vd->vdev_cant_read;
+	boolean_t required;
+
+	ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
+
+	if (vd == spa->spa_root_vdev || vd == tvd)
+		return (B_TRUE);
+
+	/*
+	 * Temporarily mark the device as unreadable, and then determine
+	 * whether this results in any DTL outages in the top-level vdev.
+	 * If not, we can safely offline/detach/remove the device.
+	 */
+	vd->vdev_cant_read = B_TRUE;
+	vdev_dtl_reassess(tvd, 0, 0, B_FALSE);
+	required = !vdev_dtl_empty(tvd, DTL_OUTAGE);
+	vd->vdev_cant_read = cant_read;
+	vdev_dtl_reassess(tvd, 0, 0, B_FALSE);
+
+	if (!required && zio_injection_enabled)
+		required = !!zio_handle_device_injection(vd, NULL, ECHILD);
+
+	return (required);
+}
+
+/*
+ * Determine if resilver is needed, and if so the txg range.
+ */
+boolean_t
+vdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp)
+{
+	boolean_t needed = B_FALSE;
+	uint64_t thismin = UINT64_MAX;
+	uint64_t thismax = 0;
+
+	if (vd->vdev_children == 0) {
+		mutex_enter(&vd->vdev_dtl_lock);
+		if (vd->vdev_dtl[DTL_MISSING].sm_space != 0 &&
+		    vdev_writeable(vd)) {
+			space_seg_t *ss;
+
+			ss = avl_first(&vd->vdev_dtl[DTL_MISSING].sm_root);
+			thismin = ss->ss_start - 1;
+			ss = avl_last(&vd->vdev_dtl[DTL_MISSING].sm_root);
+			thismax = ss->ss_end;
+			needed = B_TRUE;
+		}
+		mutex_exit(&vd->vdev_dtl_lock);
+	} else {
+		for (int c = 0; c < vd->vdev_children; c++) {
+			vdev_t *cvd = vd->vdev_child[c];
+			uint64_t cmin, cmax;
+
+			if (vdev_resilver_needed(cvd, &cmin, &cmax)) {
+				thismin = MIN(thismin, cmin);
+				thismax = MAX(thismax, cmax);
+				needed = B_TRUE;
+			}
+		}
+	}
+
+	if (needed && minp) {
+		*minp = thismin;
+		*maxp = thismax;
+	}
+	return (needed);
+}
+
+void
+vdev_load(vdev_t *vd)
+{
+	/*
+	 * Recursively load all children.
+	 */
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_load(vd->vdev_child[c]);
+
+	/*
+	 * If this is a top-level vdev, initialize its metaslabs.
+	 */
+	if (vd == vd->vdev_top && !vd->vdev_ishole &&
+	    (vd->vdev_ashift == 0 || vd->vdev_asize == 0 ||
+	    vdev_metaslab_init(vd, 0) != 0))
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
+		    VDEV_AUX_CORRUPT_DATA);
+
+	/*
+	 * If this is a leaf vdev, load its DTL.
+	 */
+	if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0)
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
+		    VDEV_AUX_CORRUPT_DATA);
+}
+
+/*
+ * The special vdev case is used for hot spares and l2cache devices.  Its
+ * sole purpose it to set the vdev state for the associated vdev.  To do this,
+ * we make sure that we can open the underlying device, then try to read the
+ * label, and make sure that the label is sane and that it hasn't been
+ * repurposed to another pool.
+ */
+int
+vdev_validate_aux(vdev_t *vd)
+{
+	nvlist_t *label;
+	uint64_t guid, version;
+	uint64_t state;
+
+	if (!vdev_readable(vd))
+		return (0);
+
+	if ((label = vdev_label_read_config(vd)) == NULL) {
+		vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
+		    VDEV_AUX_CORRUPT_DATA);
+		return (-1);
+	}
+
+	if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 ||
+	    version > SPA_VERSION ||
+	    nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 ||
+	    guid != vd->vdev_guid ||
+	    nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) {
+		vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
+		    VDEV_AUX_CORRUPT_DATA);
+		nvlist_free(label);
+		return (-1);
+	}
+
+	/*
+	 * We don't actually check the pool state here.  If it's in fact in
+	 * use by another pool, we update this fact on the fly when requested.
+	 */
+	nvlist_free(label);
+	return (0);
+}
+
+void
+vdev_remove(vdev_t *vd, uint64_t txg)
+{
+	spa_t *spa = vd->vdev_spa;
+	objset_t *mos = spa->spa_meta_objset;
+	dmu_tx_t *tx;
+
+	tx = dmu_tx_create_assigned(spa_get_dsl(spa), txg);
+
+	if (vd->vdev_dtl_smo.smo_object) {
+		ASSERT3U(vd->vdev_dtl_smo.smo_alloc, ==, 0);
+		(void) dmu_object_free(mos, vd->vdev_dtl_smo.smo_object, tx);
+		vd->vdev_dtl_smo.smo_object = 0;
+	}
+
+	if (vd->vdev_ms != NULL) {
+		for (int m = 0; m < vd->vdev_ms_count; m++) {
+			metaslab_t *msp = vd->vdev_ms[m];
+
+			if (msp == NULL || msp->ms_smo.smo_object == 0)
+				continue;
+
+			ASSERT3U(msp->ms_smo.smo_alloc, ==, 0);
+			(void) dmu_object_free(mos, msp->ms_smo.smo_object, tx);
+			msp->ms_smo.smo_object = 0;
+		}
+	}
+
+	if (vd->vdev_ms_array) {
+		(void) dmu_object_free(mos, vd->vdev_ms_array, tx);
+		vd->vdev_ms_array = 0;
+		vd->vdev_ms_shift = 0;
+	}
+	dmu_tx_commit(tx);
+}
+
+void
+vdev_sync_done(vdev_t *vd, uint64_t txg)
+{
+	metaslab_t *msp;
+	boolean_t reassess = !txg_list_empty(&vd->vdev_ms_list, TXG_CLEAN(txg));
+
+	ASSERT(!vd->vdev_ishole);
+
+	while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg)))
+		metaslab_sync_done(msp, txg);
+
+	if (reassess)
+		metaslab_sync_reassess(vd->vdev_mg);
+}
+
+void
+vdev_sync(vdev_t *vd, uint64_t txg)
+{
+	spa_t *spa = vd->vdev_spa;
+	vdev_t *lvd;
+	metaslab_t *msp;
+	dmu_tx_t *tx;
+
+	ASSERT(!vd->vdev_ishole);
+
+	if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) {
+		ASSERT(vd == vd->vdev_top);
+		tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg);
+		vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset,
+		    DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx);
+		ASSERT(vd->vdev_ms_array != 0);
+		vdev_config_dirty(vd);
+		dmu_tx_commit(tx);
+	}
+
+	/*
+	 * Remove the metadata associated with this vdev once it's empty.
+	 */
+	if (vd->vdev_stat.vs_alloc == 0 && vd->vdev_removing)
+		vdev_remove(vd, txg);
+
+	while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) {
+		metaslab_sync(msp, txg);
+		(void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg));
+	}
+
+	while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL)
+		vdev_dtl_sync(lvd, txg);
+
+	(void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg));
+}
+
+uint64_t
+vdev_psize_to_asize(vdev_t *vd, uint64_t psize)
+{
+	return (vd->vdev_ops->vdev_op_asize(vd, psize));
+}
+
+/*
+ * Mark the given vdev faulted.  A faulted vdev behaves as if the device could
+ * not be opened, and no I/O is attempted.
+ */
+int
+vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux)
+{
+	vdev_t *vd, *tvd;
+
+	spa_vdev_state_enter(spa, SCL_NONE);
+
+	if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
+		return (spa_vdev_state_exit(spa, NULL, ENODEV));
+
+	if (!vd->vdev_ops->vdev_op_leaf)
+		return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
+
+	tvd = vd->vdev_top;
+
+	/*
+	 * We don't directly use the aux state here, but if we do a
+	 * vdev_reopen(), we need this value to be present to remember why we
+	 * were faulted.
+	 */
+	vd->vdev_label_aux = aux;
+
+	/*
+	 * Faulted state takes precedence over degraded.
+	 */
+	vd->vdev_delayed_close = B_FALSE;
+	vd->vdev_faulted = 1ULL;
+	vd->vdev_degraded = 0ULL;
+	vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, aux);
+
+	/*
+	 * If this device has the only valid copy of the data, then
+	 * back off and simply mark the vdev as degraded instead.
+	 */
+	if (!tvd->vdev_islog && vd->vdev_aux == NULL && vdev_dtl_required(vd)) {
+		vd->vdev_degraded = 1ULL;
+		vd->vdev_faulted = 0ULL;
+
+		/*
+		 * If we reopen the device and it's not dead, only then do we
+		 * mark it degraded.
+		 */
+		vdev_reopen(tvd);
+
+		if (vdev_readable(vd))
+			vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, aux);
+	}
+
+	return (spa_vdev_state_exit(spa, vd, 0));
+}
+
+/*
+ * Mark the given vdev degraded.  A degraded vdev is purely an indication to the
+ * user that something is wrong.  The vdev continues to operate as normal as far
+ * as I/O is concerned.
+ */
+int
+vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux)
+{
+	vdev_t *vd;
+
+	spa_vdev_state_enter(spa, SCL_NONE);
+
+	if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
+		return (spa_vdev_state_exit(spa, NULL, ENODEV));
+
+	if (!vd->vdev_ops->vdev_op_leaf)
+		return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
+
+	/*
+	 * If the vdev is already faulted, then don't do anything.
+	 */
+	if (vd->vdev_faulted || vd->vdev_degraded)
+		return (spa_vdev_state_exit(spa, NULL, 0));
+
+	vd->vdev_degraded = 1ULL;
+	if (!vdev_is_dead(vd))
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED,
+		    aux);
+
+	return (spa_vdev_state_exit(spa, vd, 0));
+}
+
+/*
+ * Online the given vdev.  If 'unspare' is set, it implies two things.  First,
+ * any attached spare device should be detached when the device finishes
+ * resilvering.  Second, the online should be treated like a 'test' online case,
+ * so no FMA events are generated if the device fails to open.
+ */
+int
+vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate)
+{
+	vdev_t *vd, *tvd, *pvd, *rvd = spa->spa_root_vdev;
+
+	spa_vdev_state_enter(spa, SCL_NONE);
+
+	if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
+		return (spa_vdev_state_exit(spa, NULL, ENODEV));
+
+	if (!vd->vdev_ops->vdev_op_leaf)
+		return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
+
+	tvd = vd->vdev_top;
+	vd->vdev_offline = B_FALSE;
+	vd->vdev_tmpoffline = B_FALSE;
+	vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE);
+	vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT);
+
+	/* XXX - L2ARC 1.0 does not support expansion */
+	if (!vd->vdev_aux) {
+		for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent)
+			pvd->vdev_expanding = !!(flags & ZFS_ONLINE_EXPAND);
+	}
+
+	vdev_reopen(tvd);
+	vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE;
+
+	if (!vd->vdev_aux) {
+		for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent)
+			pvd->vdev_expanding = B_FALSE;
+	}
+
+	if (newstate)
+		*newstate = vd->vdev_state;
+	if ((flags & ZFS_ONLINE_UNSPARE) &&
+	    !vdev_is_dead(vd) && vd->vdev_parent &&
+	    vd->vdev_parent->vdev_ops == &vdev_spare_ops &&
+	    vd->vdev_parent->vdev_child[0] == vd)
+		vd->vdev_unspare = B_TRUE;
+
+	if ((flags & ZFS_ONLINE_EXPAND) || spa->spa_autoexpand) {
+
+		/* XXX - L2ARC 1.0 does not support expansion */
+		if (vd->vdev_aux)
+			return (spa_vdev_state_exit(spa, vd, ENOTSUP));
+		spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
+	}
+	return (spa_vdev_state_exit(spa, vd, 0));
+}
+
+static int
+vdev_offline_locked(spa_t *spa, uint64_t guid, uint64_t flags)
+{
+	vdev_t *vd, *tvd;
+	int error = 0;
+	uint64_t generation;
+	metaslab_group_t *mg;
+
+top:
+	spa_vdev_state_enter(spa, SCL_ALLOC);
+
+	if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
+		return (spa_vdev_state_exit(spa, NULL, ENODEV));
+
+	if (!vd->vdev_ops->vdev_op_leaf)
+		return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
+
+	tvd = vd->vdev_top;
+	mg = tvd->vdev_mg;
+	generation = spa->spa_config_generation + 1;
+
+	/*
+	 * If the device isn't already offline, try to offline it.
+	 */
+	if (!vd->vdev_offline) {
+		/*
+		 * If this device has the only valid copy of some data,
+		 * don't allow it to be offlined. Log devices are always
+		 * expendable.
+		 */
+		if (!tvd->vdev_islog && vd->vdev_aux == NULL &&
+		    vdev_dtl_required(vd))
+			return (spa_vdev_state_exit(spa, NULL, EBUSY));
+
+		/*
+		 * If the top-level is a slog and it has had allocations
+		 * then proceed.  We check that the vdev's metaslab group
+		 * is not NULL since it's possible that we may have just
+		 * added this vdev but not yet initialized its metaslabs.
+		 */
+		if (tvd->vdev_islog && mg != NULL) {
+			/*
+			 * Prevent any future allocations.
+			 */
+			metaslab_group_passivate(mg);
+			(void) spa_vdev_state_exit(spa, vd, 0);
+
+			error = spa_offline_log(spa);
+
+			spa_vdev_state_enter(spa, SCL_ALLOC);
+
+			/*
+			 * Check to see if the config has changed.
+			 */
+			if (error || generation != spa->spa_config_generation) {
+				metaslab_group_activate(mg);
+				if (error)
+					return (spa_vdev_state_exit(spa,
+					    vd, error));
+				(void) spa_vdev_state_exit(spa, vd, 0);
+				goto top;
+			}
+			ASSERT3U(tvd->vdev_stat.vs_alloc, ==, 0);
+		}
+
+		/*
+		 * Offline this device and reopen its top-level vdev.
+		 * If the top-level vdev is a log device then just offline
+		 * it. Otherwise, if this action results in the top-level
+		 * vdev becoming unusable, undo it and fail the request.
+		 */
+		vd->vdev_offline = B_TRUE;
+		vdev_reopen(tvd);
+
+		if (!tvd->vdev_islog && vd->vdev_aux == NULL &&
+		    vdev_is_dead(tvd)) {
+			vd->vdev_offline = B_FALSE;
+			vdev_reopen(tvd);
+			return (spa_vdev_state_exit(spa, NULL, EBUSY));
+		}
+
+		/*
+		 * Add the device back into the metaslab rotor so that
+		 * once we online the device it's open for business.
+		 */
+		if (tvd->vdev_islog && mg != NULL)
+			metaslab_group_activate(mg);
+	}
+
+	vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY);
+
+	return (spa_vdev_state_exit(spa, vd, 0));
+}
+
+int
+vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags)
+{
+	int error;
+
+	mutex_enter(&spa->spa_vdev_top_lock);
+	error = vdev_offline_locked(spa, guid, flags);
+	mutex_exit(&spa->spa_vdev_top_lock);
+
+	return (error);
+}
+
+/*
+ * Clear the error counts associated with this vdev.  Unlike vdev_online() and
+ * vdev_offline(), we assume the spa config is locked.  We also clear all
+ * children.  If 'vd' is NULL, then the user wants to clear all vdevs.
+ */
+void
+vdev_clear(spa_t *spa, vdev_t *vd)
+{
+	vdev_t *rvd = spa->spa_root_vdev;
+
+	ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
+
+	if (vd == NULL)
+		vd = rvd;
+
+	vd->vdev_stat.vs_read_errors = 0;
+	vd->vdev_stat.vs_write_errors = 0;
+	vd->vdev_stat.vs_checksum_errors = 0;
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_clear(spa, vd->vdev_child[c]);
+
+	/*
+	 * If we're in the FAULTED state or have experienced failed I/O, then
+	 * clear the persistent state and attempt to reopen the device.  We
+	 * also mark the vdev config dirty, so that the new faulted state is
+	 * written out to disk.
+	 */
+	if (vd->vdev_faulted || vd->vdev_degraded ||
+	    !vdev_readable(vd) || !vdev_writeable(vd)) {
+
+		/*
+		 * When reopening in reponse to a clear event, it may be due to
+		 * a fmadm repair request.  In this case, if the device is
+		 * still broken, we want to still post the ereport again.
+		 */
+		vd->vdev_forcefault = B_TRUE;
+
+		vd->vdev_faulted = vd->vdev_degraded = 0ULL;
+		vd->vdev_cant_read = B_FALSE;
+		vd->vdev_cant_write = B_FALSE;
+
+		vdev_reopen(vd == rvd ? rvd : vd->vdev_top);
+
+		vd->vdev_forcefault = B_FALSE;
+
+		if (vd != rvd && vdev_writeable(vd->vdev_top))
+			vdev_state_dirty(vd->vdev_top);
+
+		if (vd->vdev_aux == NULL && !vdev_is_dead(vd))
+			spa_async_request(spa, SPA_ASYNC_RESILVER);
+
+		spa_event_notify(spa, vd, ESC_ZFS_VDEV_CLEAR);
+	}
+
+	/*
+	 * When clearing a FMA-diagnosed fault, we always want to
+	 * unspare the device, as we assume that the original spare was
+	 * done in response to the FMA fault.
+	 */
+	if (!vdev_is_dead(vd) && vd->vdev_parent != NULL &&
+	    vd->vdev_parent->vdev_ops == &vdev_spare_ops &&
+	    vd->vdev_parent->vdev_child[0] == vd)
+		vd->vdev_unspare = B_TRUE;
+}
+
+boolean_t
+vdev_is_dead(vdev_t *vd)
+{
+	/*
+	 * Holes and missing devices are always considered "dead".
+	 * This simplifies the code since we don't have to check for
+	 * these types of devices in the various code paths.
+	 * Instead we rely on the fact that we skip over dead devices
+	 * before issuing I/O to them.
+	 */
+	return (vd->vdev_state < VDEV_STATE_DEGRADED || vd->vdev_ishole ||
+	    vd->vdev_ops == &vdev_missing_ops);
+}
+
+boolean_t
+vdev_readable(vdev_t *vd)
+{
+	return (!vdev_is_dead(vd) && !vd->vdev_cant_read);
+}
+
+boolean_t
+vdev_writeable(vdev_t *vd)
+{
+	return (!vdev_is_dead(vd) && !vd->vdev_cant_write);
+}
+
+boolean_t
+vdev_allocatable(vdev_t *vd)
+{
+	uint64_t state = vd->vdev_state;
+
+	/*
+	 * We currently allow allocations from vdevs which may be in the
+	 * process of reopening (i.e. VDEV_STATE_CLOSED). If the device
+	 * fails to reopen then we'll catch it later when we're holding
+	 * the proper locks.  Note that we have to get the vdev state
+	 * in a local variable because although it changes atomically,
+	 * we're asking two separate questions about it.
+	 */
+	return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) &&
+	    !vd->vdev_cant_write && !vd->vdev_ishole);
+}
+
+boolean_t
+vdev_accessible(vdev_t *vd, zio_t *zio)
+{
+	ASSERT(zio->io_vd == vd);
+
+	if (vdev_is_dead(vd) || vd->vdev_remove_wanted)
+		return (B_FALSE);
+
+	if (zio->io_type == ZIO_TYPE_READ)
+		return (!vd->vdev_cant_read);
+
+	if (zio->io_type == ZIO_TYPE_WRITE)
+		return (!vd->vdev_cant_write);
+
+	return (B_TRUE);
+}
+
+/*
+ * Get statistics for the given vdev.
+ */
+void
+vdev_get_stats(vdev_t *vd, vdev_stat_t *vs)
+{
+	vdev_t *rvd = vd->vdev_spa->spa_root_vdev;
+
+	mutex_enter(&vd->vdev_stat_lock);
+	bcopy(&vd->vdev_stat, vs, sizeof (*vs));
+	vs->vs_timestamp = gethrtime() - vs->vs_timestamp;
+	vs->vs_state = vd->vdev_state;
+	vs->vs_rsize = vdev_get_min_asize(vd);
+	if (vd->vdev_ops->vdev_op_leaf)
+		vs->vs_rsize += VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE;
+	mutex_exit(&vd->vdev_stat_lock);
+
+	/*
+	 * If we're getting stats on the root vdev, aggregate the I/O counts
+	 * over all top-level vdevs (i.e. the direct children of the root).
+	 */
+	if (vd == rvd) {
+		for (int c = 0; c < rvd->vdev_children; c++) {
+			vdev_t *cvd = rvd->vdev_child[c];
+			vdev_stat_t *cvs = &cvd->vdev_stat;
+
+			mutex_enter(&vd->vdev_stat_lock);
+			for (int t = 0; t < ZIO_TYPES; t++) {
+				vs->vs_ops[t] += cvs->vs_ops[t];
+				vs->vs_bytes[t] += cvs->vs_bytes[t];
+			}
+			cvs->vs_scan_removing = cvd->vdev_removing;
+			mutex_exit(&vd->vdev_stat_lock);
+		}
+	}
+}
+
+void
+vdev_clear_stats(vdev_t *vd)
+{
+	mutex_enter(&vd->vdev_stat_lock);
+	vd->vdev_stat.vs_space = 0;
+	vd->vdev_stat.vs_dspace = 0;
+	vd->vdev_stat.vs_alloc = 0;
+	mutex_exit(&vd->vdev_stat_lock);
+}
+
+void
+vdev_scan_stat_init(vdev_t *vd)
+{
+	vdev_stat_t *vs = &vd->vdev_stat;
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_scan_stat_init(vd->vdev_child[c]);
+
+	mutex_enter(&vd->vdev_stat_lock);
+	vs->vs_scan_processed = 0;
+	mutex_exit(&vd->vdev_stat_lock);
+}
+
+void
+vdev_stat_update(zio_t *zio, uint64_t psize)
+{
+	spa_t *spa = zio->io_spa;
+	vdev_t *rvd = spa->spa_root_vdev;
+	vdev_t *vd = zio->io_vd ? zio->io_vd : rvd;
+	vdev_t *pvd;
+	uint64_t txg = zio->io_txg;
+	vdev_stat_t *vs = &vd->vdev_stat;
+	zio_type_t type = zio->io_type;
+	int flags = zio->io_flags;
+
+	/*
+	 * If this i/o is a gang leader, it didn't do any actual work.
+	 */
+	if (zio->io_gang_tree)
+		return;
+
+	if (zio->io_error == 0) {
+		/*
+		 * If this is a root i/o, don't count it -- we've already
+		 * counted the top-level vdevs, and vdev_get_stats() will
+		 * aggregate them when asked.  This reduces contention on
+		 * the root vdev_stat_lock and implicitly handles blocks
+		 * that compress away to holes, for which there is no i/o.
+		 * (Holes never create vdev children, so all the counters
+		 * remain zero, which is what we want.)
+		 *
+		 * Note: this only applies to successful i/o (io_error == 0)
+		 * because unlike i/o counts, errors are not additive.
+		 * When reading a ditto block, for example, failure of
+		 * one top-level vdev does not imply a root-level error.
+		 */
+		if (vd == rvd)
+			return;
+
+		ASSERT(vd == zio->io_vd);
+
+		if (flags & ZIO_FLAG_IO_BYPASS)
+			return;
+
+		mutex_enter(&vd->vdev_stat_lock);
+
+		if (flags & ZIO_FLAG_IO_REPAIR) {
+			if (flags & ZIO_FLAG_SCAN_THREAD) {
+				dsl_scan_phys_t *scn_phys =
+				    &spa->spa_dsl_pool->dp_scan->scn_phys;
+				uint64_t *processed = &scn_phys->scn_processed;
+
+				/* XXX cleanup? */
+				if (vd->vdev_ops->vdev_op_leaf)
+					atomic_add_64(processed, psize);
+				vs->vs_scan_processed += psize;
+			}
+
+			if (flags & ZIO_FLAG_SELF_HEAL)
+				vs->vs_self_healed += psize;
+		}
+
+		vs->vs_ops[type]++;
+		vs->vs_bytes[type] += psize;
+
+		mutex_exit(&vd->vdev_stat_lock);
+		return;
+	}
+
+	if (flags & ZIO_FLAG_SPECULATIVE)
+		return;
+
+	/*
+	 * If this is an I/O error that is going to be retried, then ignore the
+	 * error.  Otherwise, the user may interpret B_FAILFAST I/O errors as
+	 * hard errors, when in reality they can happen for any number of
+	 * innocuous reasons (bus resets, MPxIO link failure, etc).
+	 */
+	if (zio->io_error == EIO &&
+	    !(zio->io_flags & ZIO_FLAG_IO_RETRY))
+		return;
+
+	/*
+	 * Intent logs writes won't propagate their error to the root
+	 * I/O so don't mark these types of failures as pool-level
+	 * errors.
+	 */
+	if (zio->io_vd == NULL && (zio->io_flags & ZIO_FLAG_DONT_PROPAGATE))
+		return;
+
+	mutex_enter(&vd->vdev_stat_lock);
+	if (type == ZIO_TYPE_READ && !vdev_is_dead(vd)) {
+		if (zio->io_error == ECKSUM)
+			vs->vs_checksum_errors++;
+		else
+			vs->vs_read_errors++;
+	}
+	if (type == ZIO_TYPE_WRITE && !vdev_is_dead(vd))
+		vs->vs_write_errors++;
+	mutex_exit(&vd->vdev_stat_lock);
+
+	if (type == ZIO_TYPE_WRITE && txg != 0 &&
+	    (!(flags & ZIO_FLAG_IO_REPAIR) ||
+	    (flags & ZIO_FLAG_SCAN_THREAD) ||
+	    spa->spa_claiming)) {
+		/*
+		 * This is either a normal write (not a repair), or it's
+		 * a repair induced by the scrub thread, or it's a repair
+		 * made by zil_claim() during spa_load() in the first txg.
+		 * In the normal case, we commit the DTL change in the same
+		 * txg as the block was born.  In the scrub-induced repair
+		 * case, we know that scrubs run in first-pass syncing context,
+		 * so we commit the DTL change in spa_syncing_txg(spa).
+		 * In the zil_claim() case, we commit in spa_first_txg(spa).
+		 *
+		 * We currently do not make DTL entries for failed spontaneous
+		 * self-healing writes triggered by normal (non-scrubbing)
+		 * reads, because we have no transactional context in which to
+		 * do so -- and it's not clear that it'd be desirable anyway.
+		 */
+		if (vd->vdev_ops->vdev_op_leaf) {
+			uint64_t commit_txg = txg;
+			if (flags & ZIO_FLAG_SCAN_THREAD) {
+				ASSERT(flags & ZIO_FLAG_IO_REPAIR);
+				ASSERT(spa_sync_pass(spa) == 1);
+				vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1);
+				commit_txg = spa_syncing_txg(spa);
+			} else if (spa->spa_claiming) {
+				ASSERT(flags & ZIO_FLAG_IO_REPAIR);
+				commit_txg = spa_first_txg(spa);
+			}
+			ASSERT(commit_txg >= spa_syncing_txg(spa));
+			if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1))
+				return;
+			for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent)
+				vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1);
+			vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg);
+		}
+		if (vd != rvd)
+			vdev_dtl_dirty(vd, DTL_MISSING, txg, 1);
+	}
+}
+
+/*
+ * Update the in-core space usage stats for this vdev, its metaslab class,
+ * and the root vdev.
+ */
+void
+vdev_space_update(vdev_t *vd, int64_t alloc_delta, int64_t defer_delta,
+    int64_t space_delta)
+{
+	int64_t dspace_delta = space_delta;
+	spa_t *spa = vd->vdev_spa;
+	vdev_t *rvd = spa->spa_root_vdev;
+	metaslab_group_t *mg = vd->vdev_mg;
+	metaslab_class_t *mc = mg ? mg->mg_class : NULL;
+
+	ASSERT(vd == vd->vdev_top);
+
+	/*
+	 * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion
+	 * factor.  We must calculate this here and not at the root vdev
+	 * because the root vdev's psize-to-asize is simply the max of its
+	 * childrens', thus not accurate enough for us.
+	 */
+	ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0);
+	ASSERT(vd->vdev_deflate_ratio != 0 || vd->vdev_isl2cache);
+	dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) *
+	    vd->vdev_deflate_ratio;
+
+	mutex_enter(&vd->vdev_stat_lock);
+	vd->vdev_stat.vs_alloc += alloc_delta;
+	vd->vdev_stat.vs_space += space_delta;
+	vd->vdev_stat.vs_dspace += dspace_delta;
+	mutex_exit(&vd->vdev_stat_lock);
+
+	if (mc == spa_normal_class(spa)) {
+		mutex_enter(&rvd->vdev_stat_lock);
+		rvd->vdev_stat.vs_alloc += alloc_delta;
+		rvd->vdev_stat.vs_space += space_delta;
+		rvd->vdev_stat.vs_dspace += dspace_delta;
+		mutex_exit(&rvd->vdev_stat_lock);
+	}
+
+	if (mc != NULL) {
+		ASSERT(rvd == vd->vdev_parent);
+		ASSERT(vd->vdev_ms_count != 0);
+
+		metaslab_class_space_update(mc,
+		    alloc_delta, defer_delta, space_delta, dspace_delta);
+	}
+}
+
+/*
+ * Mark a top-level vdev's config as dirty, placing it on the dirty list
+ * so that it will be written out next time the vdev configuration is synced.
+ * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs.
+ */
+void
+vdev_config_dirty(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+	vdev_t *rvd = spa->spa_root_vdev;
+	int c;
+
+	ASSERT(spa_writeable(spa));
+
+	/*
+	 * If this is an aux vdev (as with l2cache and spare devices), then we
+	 * update the vdev config manually and set the sync flag.
+	 */
+	if (vd->vdev_aux != NULL) {
+		spa_aux_vdev_t *sav = vd->vdev_aux;
+		nvlist_t **aux;
+		uint_t naux;
+
+		for (c = 0; c < sav->sav_count; c++) {
+			if (sav->sav_vdevs[c] == vd)
+				break;
+		}
+
+		if (c == sav->sav_count) {
+			/*
+			 * We're being removed.  There's nothing more to do.
+			 */
+			ASSERT(sav->sav_sync == B_TRUE);
+			return;
+		}
+
+		sav->sav_sync = B_TRUE;
+
+		if (nvlist_lookup_nvlist_array(sav->sav_config,
+		    ZPOOL_CONFIG_L2CACHE, &aux, &naux) != 0) {
+			VERIFY(nvlist_lookup_nvlist_array(sav->sav_config,
+			    ZPOOL_CONFIG_SPARES, &aux, &naux) == 0);
+		}
+
+		ASSERT(c < naux);
+
+		/*
+		 * Setting the nvlist in the middle if the array is a little
+		 * sketchy, but it will work.
+		 */
+		nvlist_free(aux[c]);
+		aux[c] = vdev_config_generate(spa, vd, B_TRUE, 0);
+
+		return;
+	}
+
+	/*
+	 * The dirty list is protected by the SCL_CONFIG lock.  The caller
+	 * must either hold SCL_CONFIG as writer, or must be the sync thread
+	 * (which holds SCL_CONFIG as reader).  There's only one sync thread,
+	 * so this is sufficient to ensure mutual exclusion.
+	 */
+	ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) ||
+	    (dsl_pool_sync_context(spa_get_dsl(spa)) &&
+	    spa_config_held(spa, SCL_CONFIG, RW_READER)));
+
+	if (vd == rvd) {
+		for (c = 0; c < rvd->vdev_children; c++)
+			vdev_config_dirty(rvd->vdev_child[c]);
+	} else {
+		ASSERT(vd == vd->vdev_top);
+
+		if (!list_link_active(&vd->vdev_config_dirty_node) &&
+		    !vd->vdev_ishole)
+			list_insert_head(&spa->spa_config_dirty_list, vd);
+	}
+}
+
+void
+vdev_config_clean(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+
+	ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) ||
+	    (dsl_pool_sync_context(spa_get_dsl(spa)) &&
+	    spa_config_held(spa, SCL_CONFIG, RW_READER)));
+
+	ASSERT(list_link_active(&vd->vdev_config_dirty_node));
+	list_remove(&spa->spa_config_dirty_list, vd);
+}
+
+/*
+ * Mark a top-level vdev's state as dirty, so that the next pass of
+ * spa_sync() can convert this into vdev_config_dirty().  We distinguish
+ * the state changes from larger config changes because they require
+ * much less locking, and are often needed for administrative actions.
+ */
+void
+vdev_state_dirty(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+
+	ASSERT(spa_writeable(spa));
+	ASSERT(vd == vd->vdev_top);
+
+	/*
+	 * The state list is protected by the SCL_STATE lock.  The caller
+	 * must either hold SCL_STATE as writer, or must be the sync thread
+	 * (which holds SCL_STATE as reader).  There's only one sync thread,
+	 * so this is sufficient to ensure mutual exclusion.
+	 */
+	ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) ||
+	    (dsl_pool_sync_context(spa_get_dsl(spa)) &&
+	    spa_config_held(spa, SCL_STATE, RW_READER)));
+
+	if (!list_link_active(&vd->vdev_state_dirty_node) && !vd->vdev_ishole)
+		list_insert_head(&spa->spa_state_dirty_list, vd);
+}
+
+void
+vdev_state_clean(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+
+	ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) ||
+	    (dsl_pool_sync_context(spa_get_dsl(spa)) &&
+	    spa_config_held(spa, SCL_STATE, RW_READER)));
+
+	ASSERT(list_link_active(&vd->vdev_state_dirty_node));
+	list_remove(&spa->spa_state_dirty_list, vd);
+}
+
+/*
+ * Propagate vdev state up from children to parent.
+ */
+void
+vdev_propagate_state(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+	vdev_t *rvd = spa->spa_root_vdev;
+	int degraded = 0, faulted = 0;
+	int corrupted = 0;
+	vdev_t *child;
+
+	if (vd->vdev_children > 0) {
+		for (int c = 0; c < vd->vdev_children; c++) {
+			child = vd->vdev_child[c];
+
+			/*
+			 * Don't factor holes into the decision.
+			 */
+			if (child->vdev_ishole)
+				continue;
+
+			if (!vdev_readable(child) ||
+			    (!vdev_writeable(child) && spa_writeable(spa))) {
+				/*
+				 * Root special: if there is a top-level log
+				 * device, treat the root vdev as if it were
+				 * degraded.
+				 */
+				if (child->vdev_islog && vd == rvd)
+					degraded++;
+				else
+					faulted++;
+			} else if (child->vdev_state <= VDEV_STATE_DEGRADED) {
+				degraded++;
+			}
+
+			if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA)
+				corrupted++;
+		}
+
+		vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded);
+
+		/*
+		 * Root special: if there is a top-level vdev that cannot be
+		 * opened due to corrupted metadata, then propagate the root
+		 * vdev's aux state as 'corrupt' rather than 'insufficient
+		 * replicas'.
+		 */
+		if (corrupted && vd == rvd &&
+		    rvd->vdev_state == VDEV_STATE_CANT_OPEN)
+			vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN,
+			    VDEV_AUX_CORRUPT_DATA);
+	}
+
+	if (vd->vdev_parent)
+		vdev_propagate_state(vd->vdev_parent);
+}
+
+/*
+ * Set a vdev's state.  If this is during an open, we don't update the parent
+ * state, because we're in the process of opening children depth-first.
+ * Otherwise, we propagate the change to the parent.
+ *
+ * If this routine places a device in a faulted state, an appropriate ereport is
+ * generated.
+ */
+void
+vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux)
+{
+	uint64_t save_state;
+	spa_t *spa = vd->vdev_spa;
+
+	if (state == vd->vdev_state) {
+		vd->vdev_stat.vs_aux = aux;
+		return;
+	}
+
+	save_state = vd->vdev_state;
+
+	vd->vdev_state = state;
+	vd->vdev_stat.vs_aux = aux;
+
+	/*
+	 * If we are setting the vdev state to anything but an open state, then
+	 * always close the underlying device unless the device has requested
+	 * a delayed close (i.e. we're about to remove or fault the device).
+	 * Otherwise, we keep accessible but invalid devices open forever.
+	 * We don't call vdev_close() itself, because that implies some extra
+	 * checks (offline, etc) that we don't want here.  This is limited to
+	 * leaf devices, because otherwise closing the device will affect other
+	 * children.
+	 */
+	if (!vd->vdev_delayed_close && vdev_is_dead(vd) &&
+	    vd->vdev_ops->vdev_op_leaf)
+		vd->vdev_ops->vdev_op_close(vd);
+
+	/*
+	 * If we have brought this vdev back into service, we need
+	 * to notify fmd so that it can gracefully repair any outstanding
+	 * cases due to a missing device.  We do this in all cases, even those
+	 * that probably don't correlate to a repaired fault.  This is sure to
+	 * catch all cases, and we let the zfs-retire agent sort it out.  If
+	 * this is a transient state it's OK, as the retire agent will
+	 * double-check the state of the vdev before repairing it.
+	 */
+	if (state == VDEV_STATE_HEALTHY && vd->vdev_ops->vdev_op_leaf &&
+	    vd->vdev_prevstate != state)
+		zfs_post_state_change(spa, vd);
+
+	if (vd->vdev_removed &&
+	    state == VDEV_STATE_CANT_OPEN &&
+	    (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) {
+		/*
+		 * If the previous state is set to VDEV_STATE_REMOVED, then this
+		 * device was previously marked removed and someone attempted to
+		 * reopen it.  If this failed due to a nonexistent device, then
+		 * keep the device in the REMOVED state.  We also let this be if
+		 * it is one of our special test online cases, which is only
+		 * attempting to online the device and shouldn't generate an FMA
+		 * fault.
+		 */
+		vd->vdev_state = VDEV_STATE_REMOVED;
+		vd->vdev_stat.vs_aux = VDEV_AUX_NONE;
+	} else if (state == VDEV_STATE_REMOVED) {
+		vd->vdev_removed = B_TRUE;
+	} else if (state == VDEV_STATE_CANT_OPEN) {
+		/*
+		 * If we fail to open a vdev during an import or recovery, we
+		 * mark it as "not available", which signifies that it was
+		 * never there to begin with.  Failure to open such a device
+		 * is not considered an error.
+		 */
+		if ((spa_load_state(spa) == SPA_LOAD_IMPORT ||
+		    spa_load_state(spa) == SPA_LOAD_RECOVER) &&
+		    vd->vdev_ops->vdev_op_leaf)
+			vd->vdev_not_present = 1;
+
+		/*
+		 * Post the appropriate ereport.  If the 'prevstate' field is
+		 * set to something other than VDEV_STATE_UNKNOWN, it indicates
+		 * that this is part of a vdev_reopen().  In this case, we don't
+		 * want to post the ereport if the device was already in the
+		 * CANT_OPEN state beforehand.
+		 *
+		 * If the 'checkremove' flag is set, then this is an attempt to
+		 * online the device in response to an insertion event.  If we
+		 * hit this case, then we have detected an insertion event for a
+		 * faulted or offline device that wasn't in the removed state.
+		 * In this scenario, we don't post an ereport because we are
+		 * about to replace the device, or attempt an online with
+		 * vdev_forcefault, which will generate the fault for us.
+		 */
+		if ((vd->vdev_prevstate != state || vd->vdev_forcefault) &&
+		    !vd->vdev_not_present && !vd->vdev_checkremove &&
+		    vd != spa->spa_root_vdev) {
+			const char *class;
+
+			switch (aux) {
+			case VDEV_AUX_OPEN_FAILED:
+				class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED;
+				break;
+			case VDEV_AUX_CORRUPT_DATA:
+				class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA;
+				break;
+			case VDEV_AUX_NO_REPLICAS:
+				class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS;
+				break;
+			case VDEV_AUX_BAD_GUID_SUM:
+				class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM;
+				break;
+			case VDEV_AUX_TOO_SMALL:
+				class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL;
+				break;
+			case VDEV_AUX_BAD_LABEL:
+				class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL;
+				break;
+			default:
+				class = FM_EREPORT_ZFS_DEVICE_UNKNOWN;
+			}
+
+			zfs_ereport_post(class, spa, vd, NULL, save_state, 0);
+		}
+
+		/* Erase any notion of persistent removed state */
+		vd->vdev_removed = B_FALSE;
+	} else {
+		vd->vdev_removed = B_FALSE;
+	}
+
+	if (!isopen && vd->vdev_parent)
+		vdev_propagate_state(vd->vdev_parent);
+}
+
+/*
+ * Check the vdev configuration to ensure that it's capable of supporting
+ * a root pool. Currently, we do not support RAID-Z or partial configuration.
+ * In addition, only a single top-level vdev is allowed and none of the leaves
+ * can be wholedisks.
+ */
+boolean_t
+vdev_is_bootable(vdev_t *vd)
+{
+	if (!vd->vdev_ops->vdev_op_leaf) {
+		char *vdev_type = vd->vdev_ops->vdev_op_type;
+
+		if (strcmp(vdev_type, VDEV_TYPE_ROOT) == 0 &&
+		    vd->vdev_children > 1) {
+			return (B_FALSE);
+		} else if (strcmp(vdev_type, VDEV_TYPE_RAIDZ) == 0 ||
+		    strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) {
+			return (B_FALSE);
+		}
+	} else if (vd->vdev_wholedisk == 1) {
+		return (B_FALSE);
+	}
+
+	for (int c = 0; c < vd->vdev_children; c++) {
+		if (!vdev_is_bootable(vd->vdev_child[c]))
+			return (B_FALSE);
+	}
+	return (B_TRUE);
+}
+
+/*
+ * Load the state from the original vdev tree (ovd) which
+ * we've retrieved from the MOS config object. If the original
+ * vdev was offline or faulted then we transfer that state to the
+ * device in the current vdev tree (nvd).
+ */
+void
+vdev_load_log_state(vdev_t *nvd, vdev_t *ovd)
+{
+	spa_t *spa = nvd->vdev_spa;
+
+	ASSERT(nvd->vdev_top->vdev_islog);
+	ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
+	ASSERT3U(nvd->vdev_guid, ==, ovd->vdev_guid);
+
+	for (int c = 0; c < nvd->vdev_children; c++)
+		vdev_load_log_state(nvd->vdev_child[c], ovd->vdev_child[c]);
+
+	if (nvd->vdev_ops->vdev_op_leaf) {
+		/*
+		 * Restore the persistent vdev state
+		 */
+		nvd->vdev_offline = ovd->vdev_offline;
+		nvd->vdev_faulted = ovd->vdev_faulted;
+		nvd->vdev_degraded = ovd->vdev_degraded;
+		nvd->vdev_removed = ovd->vdev_removed;
+	}
+}
+
+/*
+ * Determine if a log device has valid content.  If the vdev was
+ * removed or faulted in the MOS config then we know that
+ * the content on the log device has already been written to the pool.
+ */
+boolean_t
+vdev_log_state_valid(vdev_t *vd)
+{
+	if (vd->vdev_ops->vdev_op_leaf && !vd->vdev_faulted &&
+	    !vd->vdev_removed)
+		return (B_TRUE);
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		if (vdev_log_state_valid(vd->vdev_child[c]))
+			return (B_TRUE);
+
+	return (B_FALSE);
+}
+
+/*
+ * Expand a vdev if possible.
+ */
+void
+vdev_expand(vdev_t *vd, uint64_t txg)
+{
+	ASSERT(vd->vdev_top == vd);
+	ASSERT(spa_config_held(vd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+
+	if ((vd->vdev_asize >> vd->vdev_ms_shift) > vd->vdev_ms_count) {
+		VERIFY(vdev_metaslab_init(vd, txg) == 0);
+		vdev_config_dirty(vd);
+	}
+}
+
+/*
+ * Split a vdev.
+ */
+void
+vdev_split(vdev_t *vd)
+{
+	vdev_t *cvd, *pvd = vd->vdev_parent;
+
+	vdev_remove_child(pvd, vd);
+	vdev_compact_children(pvd);
+
+	cvd = pvd->vdev_child[0];
+	if (pvd->vdev_children == 1) {
+		vdev_remove_parent(cvd);
+		cvd->vdev_splitting = B_TRUE;
+	}
+	vdev_propagate_state(cvd);
+}
diff --git a/uts/common/fs/zfs/vdev_cache.c b/uts/common/fs/zfs/vdev_cache.c
new file mode 100644
index 000000000000..688d541344cb
--- /dev/null
+++ b/uts/common/fs/zfs/vdev_cache.c
@@ -0,0 +1,416 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/vdev_impl.h>
+#include <sys/zio.h>
+#include <sys/kstat.h>
+
+/*
+ * Virtual device read-ahead caching.
+ *
+ * This file implements a simple LRU read-ahead cache.  When the DMU reads
+ * a given block, it will often want other, nearby blocks soon thereafter.
+ * We take advantage of this by reading a larger disk region and caching
+ * the result.  In the best case, this can turn 128 back-to-back 512-byte
+ * reads into a single 64k read followed by 127 cache hits; this reduces
+ * latency dramatically.  In the worst case, it can turn an isolated 512-byte
+ * read into a 64k read, which doesn't affect latency all that much but is
+ * terribly wasteful of bandwidth.  A more intelligent version of the cache
+ * could keep track of access patterns and not do read-ahead unless it sees
+ * at least two temporally close I/Os to the same region.  Currently, only
+ * metadata I/O is inflated.  A futher enhancement could take advantage of
+ * more semantic information about the I/O.  And it could use something
+ * faster than an AVL tree; that was chosen solely for convenience.
+ *
+ * There are five cache operations: allocate, fill, read, write, evict.
+ *
+ * (1) Allocate.  This reserves a cache entry for the specified region.
+ *     We separate the allocate and fill operations so that multiple threads
+ *     don't generate I/O for the same cache miss.
+ *
+ * (2) Fill.  When the I/O for a cache miss completes, the fill routine
+ *     places the data in the previously allocated cache entry.
+ *
+ * (3) Read.  Read data from the cache.
+ *
+ * (4) Write.  Update cache contents after write completion.
+ *
+ * (5) Evict.  When allocating a new entry, we evict the oldest (LRU) entry
+ *     if the total cache size exceeds zfs_vdev_cache_size.
+ */
+
+/*
+ * These tunables are for performance analysis.
+ */
+/*
+ * All i/os smaller than zfs_vdev_cache_max will be turned into
+ * 1<<zfs_vdev_cache_bshift byte reads by the vdev_cache (aka software
+ * track buffer).  At most zfs_vdev_cache_size bytes will be kept in each
+ * vdev's vdev_cache.
+ */
+int zfs_vdev_cache_max = 1<<14;			/* 16KB */
+int zfs_vdev_cache_size = 10ULL << 20;		/* 10MB */
+int zfs_vdev_cache_bshift = 16;
+
+#define	VCBS (1 << zfs_vdev_cache_bshift)	/* 64KB */
+
+kstat_t	*vdc_ksp = NULL;
+
+typedef struct vdc_stats {
+	kstat_named_t vdc_stat_delegations;
+	kstat_named_t vdc_stat_hits;
+	kstat_named_t vdc_stat_misses;
+} vdc_stats_t;
+
+static vdc_stats_t vdc_stats = {
+	{ "delegations",	KSTAT_DATA_UINT64 },
+	{ "hits",		KSTAT_DATA_UINT64 },
+	{ "misses",		KSTAT_DATA_UINT64 }
+};
+
+#define	VDCSTAT_BUMP(stat)	atomic_add_64(&vdc_stats.stat.value.ui64, 1);
+
+static int
+vdev_cache_offset_compare(const void *a1, const void *a2)
+{
+	const vdev_cache_entry_t *ve1 = a1;
+	const vdev_cache_entry_t *ve2 = a2;
+
+	if (ve1->ve_offset < ve2->ve_offset)
+		return (-1);
+	if (ve1->ve_offset > ve2->ve_offset)
+		return (1);
+	return (0);
+}
+
+static int
+vdev_cache_lastused_compare(const void *a1, const void *a2)
+{
+	const vdev_cache_entry_t *ve1 = a1;
+	const vdev_cache_entry_t *ve2 = a2;
+
+	if (ve1->ve_lastused < ve2->ve_lastused)
+		return (-1);
+	if (ve1->ve_lastused > ve2->ve_lastused)
+		return (1);
+
+	/*
+	 * Among equally old entries, sort by offset to ensure uniqueness.
+	 */
+	return (vdev_cache_offset_compare(a1, a2));
+}
+
+/*
+ * Evict the specified entry from the cache.
+ */
+static void
+vdev_cache_evict(vdev_cache_t *vc, vdev_cache_entry_t *ve)
+{
+	ASSERT(MUTEX_HELD(&vc->vc_lock));
+	ASSERT(ve->ve_fill_io == NULL);
+	ASSERT(ve->ve_data != NULL);
+
+	avl_remove(&vc->vc_lastused_tree, ve);
+	avl_remove(&vc->vc_offset_tree, ve);
+	zio_buf_free(ve->ve_data, VCBS);
+	kmem_free(ve, sizeof (vdev_cache_entry_t));
+}
+
+/*
+ * Allocate an entry in the cache.  At the point we don't have the data,
+ * we're just creating a placeholder so that multiple threads don't all
+ * go off and read the same blocks.
+ */
+static vdev_cache_entry_t *
+vdev_cache_allocate(zio_t *zio)
+{
+	vdev_cache_t *vc = &zio->io_vd->vdev_cache;
+	uint64_t offset = P2ALIGN(zio->io_offset, VCBS);
+	vdev_cache_entry_t *ve;
+
+	ASSERT(MUTEX_HELD(&vc->vc_lock));
+
+	if (zfs_vdev_cache_size == 0)
+		return (NULL);
+
+	/*
+	 * If adding a new entry would exceed the cache size,
+	 * evict the oldest entry (LRU).
+	 */
+	if ((avl_numnodes(&vc->vc_lastused_tree) << zfs_vdev_cache_bshift) >
+	    zfs_vdev_cache_size) {
+		ve = avl_first(&vc->vc_lastused_tree);
+		if (ve->ve_fill_io != NULL)
+			return (NULL);
+		ASSERT(ve->ve_hits != 0);
+		vdev_cache_evict(vc, ve);
+	}
+
+	ve = kmem_zalloc(sizeof (vdev_cache_entry_t), KM_SLEEP);
+	ve->ve_offset = offset;
+	ve->ve_lastused = ddi_get_lbolt();
+	ve->ve_data = zio_buf_alloc(VCBS);
+
+	avl_add(&vc->vc_offset_tree, ve);
+	avl_add(&vc->vc_lastused_tree, ve);
+
+	return (ve);
+}
+
+static void
+vdev_cache_hit(vdev_cache_t *vc, vdev_cache_entry_t *ve, zio_t *zio)
+{
+	uint64_t cache_phase = P2PHASE(zio->io_offset, VCBS);
+
+	ASSERT(MUTEX_HELD(&vc->vc_lock));
+	ASSERT(ve->ve_fill_io == NULL);
+
+	if (ve->ve_lastused != ddi_get_lbolt()) {
+		avl_remove(&vc->vc_lastused_tree, ve);
+		ve->ve_lastused = ddi_get_lbolt();
+		avl_add(&vc->vc_lastused_tree, ve);
+	}
+
+	ve->ve_hits++;
+	bcopy(ve->ve_data + cache_phase, zio->io_data, zio->io_size);
+}
+
+/*
+ * Fill a previously allocated cache entry with data.
+ */
+static void
+vdev_cache_fill(zio_t *fio)
+{
+	vdev_t *vd = fio->io_vd;
+	vdev_cache_t *vc = &vd->vdev_cache;
+	vdev_cache_entry_t *ve = fio->io_private;
+	zio_t *pio;
+
+	ASSERT(fio->io_size == VCBS);
+
+	/*
+	 * Add data to the cache.
+	 */
+	mutex_enter(&vc->vc_lock);
+
+	ASSERT(ve->ve_fill_io == fio);
+	ASSERT(ve->ve_offset == fio->io_offset);
+	ASSERT(ve->ve_data == fio->io_data);
+
+	ve->ve_fill_io = NULL;
+
+	/*
+	 * Even if this cache line was invalidated by a missed write update,
+	 * any reads that were queued up before the missed update are still
+	 * valid, so we can satisfy them from this line before we evict it.
+	 */
+	while ((pio = zio_walk_parents(fio)) != NULL)
+		vdev_cache_hit(vc, ve, pio);
+
+	if (fio->io_error || ve->ve_missed_update)
+		vdev_cache_evict(vc, ve);
+
+	mutex_exit(&vc->vc_lock);
+}
+
+/*
+ * Read data from the cache.  Returns 0 on cache hit, errno on a miss.
+ */
+int
+vdev_cache_read(zio_t *zio)
+{
+	vdev_cache_t *vc = &zio->io_vd->vdev_cache;
+	vdev_cache_entry_t *ve, ve_search;
+	uint64_t cache_offset = P2ALIGN(zio->io_offset, VCBS);
+	uint64_t cache_phase = P2PHASE(zio->io_offset, VCBS);
+	zio_t *fio;
+
+	ASSERT(zio->io_type == ZIO_TYPE_READ);
+
+	if (zio->io_flags & ZIO_FLAG_DONT_CACHE)
+		return (EINVAL);
+
+	if (zio->io_size > zfs_vdev_cache_max)
+		return (EOVERFLOW);
+
+	/*
+	 * If the I/O straddles two or more cache blocks, don't cache it.
+	 */
+	if (P2BOUNDARY(zio->io_offset, zio->io_size, VCBS))
+		return (EXDEV);
+
+	ASSERT(cache_phase + zio->io_size <= VCBS);
+
+	mutex_enter(&vc->vc_lock);
+
+	ve_search.ve_offset = cache_offset;
+	ve = avl_find(&vc->vc_offset_tree, &ve_search, NULL);
+
+	if (ve != NULL) {
+		if (ve->ve_missed_update) {
+			mutex_exit(&vc->vc_lock);
+			return (ESTALE);
+		}
+
+		if ((fio = ve->ve_fill_io) != NULL) {
+			zio_vdev_io_bypass(zio);
+			zio_add_child(zio, fio);
+			mutex_exit(&vc->vc_lock);
+			VDCSTAT_BUMP(vdc_stat_delegations);
+			return (0);
+		}
+
+		vdev_cache_hit(vc, ve, zio);
+		zio_vdev_io_bypass(zio);
+
+		mutex_exit(&vc->vc_lock);
+		VDCSTAT_BUMP(vdc_stat_hits);
+		return (0);
+	}
+
+	ve = vdev_cache_allocate(zio);
+
+	if (ve == NULL) {
+		mutex_exit(&vc->vc_lock);
+		return (ENOMEM);
+	}
+
+	fio = zio_vdev_delegated_io(zio->io_vd, cache_offset,
+	    ve->ve_data, VCBS, ZIO_TYPE_READ, ZIO_PRIORITY_CACHE_FILL,
+	    ZIO_FLAG_DONT_CACHE, vdev_cache_fill, ve);
+
+	ve->ve_fill_io = fio;
+	zio_vdev_io_bypass(zio);
+	zio_add_child(zio, fio);
+
+	mutex_exit(&vc->vc_lock);
+	zio_nowait(fio);
+	VDCSTAT_BUMP(vdc_stat_misses);
+
+	return (0);
+}
+
+/*
+ * Update cache contents upon write completion.
+ */
+void
+vdev_cache_write(zio_t *zio)
+{
+	vdev_cache_t *vc = &zio->io_vd->vdev_cache;
+	vdev_cache_entry_t *ve, ve_search;
+	uint64_t io_start = zio->io_offset;
+	uint64_t io_end = io_start + zio->io_size;
+	uint64_t min_offset = P2ALIGN(io_start, VCBS);
+	uint64_t max_offset = P2ROUNDUP(io_end, VCBS);
+	avl_index_t where;
+
+	ASSERT(zio->io_type == ZIO_TYPE_WRITE);
+
+	mutex_enter(&vc->vc_lock);
+
+	ve_search.ve_offset = min_offset;
+	ve = avl_find(&vc->vc_offset_tree, &ve_search, &where);
+
+	if (ve == NULL)
+		ve = avl_nearest(&vc->vc_offset_tree, where, AVL_AFTER);
+
+	while (ve != NULL && ve->ve_offset < max_offset) {
+		uint64_t start = MAX(ve->ve_offset, io_start);
+		uint64_t end = MIN(ve->ve_offset + VCBS, io_end);
+
+		if (ve->ve_fill_io != NULL) {
+			ve->ve_missed_update = 1;
+		} else {
+			bcopy((char *)zio->io_data + start - io_start,
+			    ve->ve_data + start - ve->ve_offset, end - start);
+		}
+		ve = AVL_NEXT(&vc->vc_offset_tree, ve);
+	}
+	mutex_exit(&vc->vc_lock);
+}
+
+void
+vdev_cache_purge(vdev_t *vd)
+{
+	vdev_cache_t *vc = &vd->vdev_cache;
+	vdev_cache_entry_t *ve;
+
+	mutex_enter(&vc->vc_lock);
+	while ((ve = avl_first(&vc->vc_offset_tree)) != NULL)
+		vdev_cache_evict(vc, ve);
+	mutex_exit(&vc->vc_lock);
+}
+
+void
+vdev_cache_init(vdev_t *vd)
+{
+	vdev_cache_t *vc = &vd->vdev_cache;
+
+	mutex_init(&vc->vc_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	avl_create(&vc->vc_offset_tree, vdev_cache_offset_compare,
+	    sizeof (vdev_cache_entry_t),
+	    offsetof(struct vdev_cache_entry, ve_offset_node));
+
+	avl_create(&vc->vc_lastused_tree, vdev_cache_lastused_compare,
+	    sizeof (vdev_cache_entry_t),
+	    offsetof(struct vdev_cache_entry, ve_lastused_node));
+}
+
+void
+vdev_cache_fini(vdev_t *vd)
+{
+	vdev_cache_t *vc = &vd->vdev_cache;
+
+	vdev_cache_purge(vd);
+
+	avl_destroy(&vc->vc_offset_tree);
+	avl_destroy(&vc->vc_lastused_tree);
+
+	mutex_destroy(&vc->vc_lock);
+}
+
+void
+vdev_cache_stat_init(void)
+{
+	vdc_ksp = kstat_create("zfs", 0, "vdev_cache_stats", "misc",
+	    KSTAT_TYPE_NAMED, sizeof (vdc_stats) / sizeof (kstat_named_t),
+	    KSTAT_FLAG_VIRTUAL);
+	if (vdc_ksp != NULL) {
+		vdc_ksp->ks_data = &vdc_stats;
+		kstat_install(vdc_ksp);
+	}
+}
+
+void
+vdev_cache_stat_fini(void)
+{
+	if (vdc_ksp != NULL) {
+		kstat_delete(vdc_ksp);
+		vdc_ksp = NULL;
+	}
+}
diff --git a/uts/common/fs/zfs/vdev_disk.c b/uts/common/fs/zfs/vdev_disk.c
new file mode 100644
index 000000000000..d7417736b4ee
--- /dev/null
+++ b/uts/common/fs/zfs/vdev_disk.c
@@ -0,0 +1,610 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa_impl.h>
+#include <sys/refcount.h>
+#include <sys/vdev_disk.h>
+#include <sys/vdev_impl.h>
+#include <sys/fs/zfs.h>
+#include <sys/zio.h>
+#include <sys/sunldi.h>
+#include <sys/fm/fs/zfs.h>
+
+/*
+ * Virtual device vector for disks.
+ */
+
+extern ldi_ident_t zfs_li;
+
+typedef struct vdev_disk_buf {
+	buf_t	vdb_buf;
+	zio_t	*vdb_io;
+} vdev_disk_buf_t;
+
+static void
+vdev_disk_hold(vdev_t *vd)
+{
+	ddi_devid_t devid;
+	char *minor;
+
+	ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
+
+	/*
+	 * We must have a pathname, and it must be absolute.
+	 */
+	if (vd->vdev_path == NULL || vd->vdev_path[0] != '/')
+		return;
+
+	/*
+	 * Only prefetch path and devid info if the device has
+	 * never been opened.
+	 */
+	if (vd->vdev_tsd != NULL)
+		return;
+
+	if (vd->vdev_wholedisk == -1ULL) {
+		size_t len = strlen(vd->vdev_path) + 3;
+		char *buf = kmem_alloc(len, KM_SLEEP);
+
+		(void) snprintf(buf, len, "%ss0", vd->vdev_path);
+
+		(void) ldi_vp_from_name(buf, &vd->vdev_name_vp);
+		kmem_free(buf, len);
+	}
+
+	if (vd->vdev_name_vp == NULL)
+		(void) ldi_vp_from_name(vd->vdev_path, &vd->vdev_name_vp);
+
+	if (vd->vdev_devid != NULL &&
+	    ddi_devid_str_decode(vd->vdev_devid, &devid, &minor) == 0) {
+		(void) ldi_vp_from_devid(devid, minor, &vd->vdev_devid_vp);
+		ddi_devid_str_free(minor);
+		ddi_devid_free(devid);
+	}
+}
+
+static void
+vdev_disk_rele(vdev_t *vd)
+{
+	ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
+
+	if (vd->vdev_name_vp) {
+		VN_RELE_ASYNC(vd->vdev_name_vp,
+		    dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
+		vd->vdev_name_vp = NULL;
+	}
+	if (vd->vdev_devid_vp) {
+		VN_RELE_ASYNC(vd->vdev_devid_vp,
+		    dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
+		vd->vdev_devid_vp = NULL;
+	}
+}
+
+static int
+vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
+{
+	spa_t *spa = vd->vdev_spa;
+	vdev_disk_t *dvd;
+	struct dk_minfo_ext dkmext;
+	int error;
+	dev_t dev;
+	int otyp;
+
+	/*
+	 * We must have a pathname, and it must be absolute.
+	 */
+	if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
+		vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
+		return (EINVAL);
+	}
+
+	/*
+	 * Reopen the device if it's not currently open. Otherwise,
+	 * just update the physical size of the device.
+	 */
+	if (vd->vdev_tsd != NULL) {
+		ASSERT(vd->vdev_reopening);
+		dvd = vd->vdev_tsd;
+		goto skip_open;
+	}
+
+	dvd = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_disk_t), KM_SLEEP);
+
+	/*
+	 * When opening a disk device, we want to preserve the user's original
+	 * intent.  We always want to open the device by the path the user gave
+	 * us, even if it is one of multiple paths to the save device.  But we
+	 * also want to be able to survive disks being removed/recabled.
+	 * Therefore the sequence of opening devices is:
+	 *
+	 * 1. Try opening the device by path.  For legacy pools without the
+	 *    'whole_disk' property, attempt to fix the path by appending 's0'.
+	 *
+	 * 2. If the devid of the device matches the stored value, return
+	 *    success.
+	 *
+	 * 3. Otherwise, the device may have moved.  Try opening the device
+	 *    by the devid instead.
+	 */
+	if (vd->vdev_devid != NULL) {
+		if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
+		    &dvd->vd_minor) != 0) {
+			vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
+			return (EINVAL);
+		}
+	}
+
+	error = EINVAL;		/* presume failure */
+
+	if (vd->vdev_path != NULL) {
+		ddi_devid_t devid;
+
+		if (vd->vdev_wholedisk == -1ULL) {
+			size_t len = strlen(vd->vdev_path) + 3;
+			char *buf = kmem_alloc(len, KM_SLEEP);
+			ldi_handle_t lh;
+
+			(void) snprintf(buf, len, "%ss0", vd->vdev_path);
+
+			if (ldi_open_by_name(buf, spa_mode(spa), kcred,
+			    &lh, zfs_li) == 0) {
+				spa_strfree(vd->vdev_path);
+				vd->vdev_path = buf;
+				vd->vdev_wholedisk = 1ULL;
+				(void) ldi_close(lh, spa_mode(spa), kcred);
+			} else {
+				kmem_free(buf, len);
+			}
+		}
+
+		error = ldi_open_by_name(vd->vdev_path, spa_mode(spa), kcred,
+		    &dvd->vd_lh, zfs_li);
+
+		/*
+		 * Compare the devid to the stored value.
+		 */
+		if (error == 0 && vd->vdev_devid != NULL &&
+		    ldi_get_devid(dvd->vd_lh, &devid) == 0) {
+			if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
+				error = EINVAL;
+				(void) ldi_close(dvd->vd_lh, spa_mode(spa),
+				    kcred);
+				dvd->vd_lh = NULL;
+			}
+			ddi_devid_free(devid);
+		}
+
+		/*
+		 * If we succeeded in opening the device, but 'vdev_wholedisk'
+		 * is not yet set, then this must be a slice.
+		 */
+		if (error == 0 && vd->vdev_wholedisk == -1ULL)
+			vd->vdev_wholedisk = 0;
+	}
+
+	/*
+	 * If we were unable to open by path, or the devid check fails, open by
+	 * devid instead.
+	 */
+	if (error != 0 && vd->vdev_devid != NULL)
+		error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
+		    spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);
+
+	/*
+	 * If all else fails, then try opening by physical path (if available)
+	 * or the logical path (if we failed due to the devid check).  While not
+	 * as reliable as the devid, this will give us something, and the higher
+	 * level vdev validation will prevent us from opening the wrong device.
+	 */
+	if (error) {
+		if (vd->vdev_physpath != NULL &&
+		    (dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
+			error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
+			    kcred, &dvd->vd_lh, zfs_li);
+
+		/*
+		 * Note that we don't support the legacy auto-wholedisk support
+		 * as above.  This hasn't been used in a very long time and we
+		 * don't need to propagate its oddities to this edge condition.
+		 */
+		if (error && vd->vdev_path != NULL)
+			error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
+			    kcred, &dvd->vd_lh, zfs_li);
+	}
+
+	if (error) {
+		vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
+		return (error);
+	}
+
+	/*
+	 * Once a device is opened, verify that the physical device path (if
+	 * available) is up to date.
+	 */
+	if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
+	    ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
+		char *physpath, *minorname;
+
+		physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
+		minorname = NULL;
+		if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
+		    ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
+		    (vd->vdev_physpath == NULL ||
+		    strcmp(vd->vdev_physpath, physpath) != 0)) {
+			if (vd->vdev_physpath)
+				spa_strfree(vd->vdev_physpath);
+			(void) strlcat(physpath, ":", MAXPATHLEN);
+			(void) strlcat(physpath, minorname, MAXPATHLEN);
+			vd->vdev_physpath = spa_strdup(physpath);
+		}
+		if (minorname)
+			kmem_free(minorname, strlen(minorname) + 1);
+		kmem_free(physpath, MAXPATHLEN);
+	}
+
+skip_open:
+	/*
+	 * Determine the actual size of the device.
+	 */
+	if (ldi_get_size(dvd->vd_lh, psize) != 0) {
+		vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
+		return (EINVAL);
+	}
+
+	/*
+	 * If we own the whole disk, try to enable disk write caching.
+	 * We ignore errors because it's OK if we can't do it.
+	 */
+	if (vd->vdev_wholedisk == 1) {
+		int wce = 1;
+		(void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
+		    FKIOCTL, kcred, NULL);
+	}
+
+	/*
+	 * Determine the device's minimum transfer size.
+	 * If the ioctl isn't supported, assume DEV_BSIZE.
+	 */
+	if (ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT, (intptr_t)&dkmext,
+	    FKIOCTL, kcred, NULL) != 0)
+		dkmext.dki_pbsize = DEV_BSIZE;
+
+	*ashift = highbit(MAX(dkmext.dki_pbsize, SPA_MINBLOCKSIZE)) - 1;
+
+	/*
+	 * Clear the nowritecache bit, so that on a vdev_reopen() we will
+	 * try again.
+	 */
+	vd->vdev_nowritecache = B_FALSE;
+
+	return (0);
+}
+
+static void
+vdev_disk_close(vdev_t *vd)
+{
+	vdev_disk_t *dvd = vd->vdev_tsd;
+
+	if (vd->vdev_reopening || dvd == NULL)
+		return;
+
+	if (dvd->vd_minor != NULL)
+		ddi_devid_str_free(dvd->vd_minor);
+
+	if (dvd->vd_devid != NULL)
+		ddi_devid_free(dvd->vd_devid);
+
+	if (dvd->vd_lh != NULL)
+		(void) ldi_close(dvd->vd_lh, spa_mode(vd->vdev_spa), kcred);
+
+	vd->vdev_delayed_close = B_FALSE;
+	kmem_free(dvd, sizeof (vdev_disk_t));
+	vd->vdev_tsd = NULL;
+}
+
+int
+vdev_disk_physio(ldi_handle_t vd_lh, caddr_t data, size_t size,
+    uint64_t offset, int flags)
+{
+	buf_t *bp;
+	int error = 0;
+
+	if (vd_lh == NULL)
+		return (EINVAL);
+
+	ASSERT(flags & B_READ || flags & B_WRITE);
+
+	bp = getrbuf(KM_SLEEP);
+	bp->b_flags = flags | B_BUSY | B_NOCACHE | B_FAILFAST;
+	bp->b_bcount = size;
+	bp->b_un.b_addr = (void *)data;
+	bp->b_lblkno = lbtodb(offset);
+	bp->b_bufsize = size;
+
+	error = ldi_strategy(vd_lh, bp);
+	ASSERT(error == 0);
+	if ((error = biowait(bp)) == 0 && bp->b_resid != 0)
+		error = EIO;
+	freerbuf(bp);
+
+	return (error);
+}
+
+static void
+vdev_disk_io_intr(buf_t *bp)
+{
+	vdev_disk_buf_t *vdb = (vdev_disk_buf_t *)bp;
+	zio_t *zio = vdb->vdb_io;
+
+	/*
+	 * The rest of the zio stack only deals with EIO, ECKSUM, and ENXIO.
+	 * Rather than teach the rest of the stack about other error
+	 * possibilities (EFAULT, etc), we normalize the error value here.
+	 */
+	zio->io_error = (geterror(bp) != 0 ? EIO : 0);
+
+	if (zio->io_error == 0 && bp->b_resid != 0)
+		zio->io_error = EIO;
+
+	kmem_free(vdb, sizeof (vdev_disk_buf_t));
+
+	zio_interrupt(zio);
+}
+
+static void
+vdev_disk_ioctl_free(zio_t *zio)
+{
+	kmem_free(zio->io_vsd, sizeof (struct dk_callback));
+}
+
+static const zio_vsd_ops_t vdev_disk_vsd_ops = {
+	vdev_disk_ioctl_free,
+	zio_vsd_default_cksum_report
+};
+
+static void
+vdev_disk_ioctl_done(void *zio_arg, int error)
+{
+	zio_t *zio = zio_arg;
+
+	zio->io_error = error;
+
+	zio_interrupt(zio);
+}
+
+static int
+vdev_disk_io_start(zio_t *zio)
+{
+	vdev_t *vd = zio->io_vd;
+	vdev_disk_t *dvd = vd->vdev_tsd;
+	vdev_disk_buf_t *vdb;
+	struct dk_callback *dkc;
+	buf_t *bp;
+	int error;
+
+	if (zio->io_type == ZIO_TYPE_IOCTL) {
+		/* XXPOLICY */
+		if (!vdev_readable(vd)) {
+			zio->io_error = ENXIO;
+			return (ZIO_PIPELINE_CONTINUE);
+		}
+
+		switch (zio->io_cmd) {
+
+		case DKIOCFLUSHWRITECACHE:
+
+			if (zfs_nocacheflush)
+				break;
+
+			if (vd->vdev_nowritecache) {
+				zio->io_error = ENOTSUP;
+				break;
+			}
+
+			zio->io_vsd = dkc = kmem_alloc(sizeof (*dkc), KM_SLEEP);
+			zio->io_vsd_ops = &vdev_disk_vsd_ops;
+
+			dkc->dkc_callback = vdev_disk_ioctl_done;
+			dkc->dkc_flag = FLUSH_VOLATILE;
+			dkc->dkc_cookie = zio;
+
+			error = ldi_ioctl(dvd->vd_lh, zio->io_cmd,
+			    (uintptr_t)dkc, FKIOCTL, kcred, NULL);
+
+			if (error == 0) {
+				/*
+				 * The ioctl will be done asychronously,
+				 * and will call vdev_disk_ioctl_done()
+				 * upon completion.
+				 */
+				return (ZIO_PIPELINE_STOP);
+			}
+
+			if (error == ENOTSUP || error == ENOTTY) {
+				/*
+				 * If we get ENOTSUP or ENOTTY, we know that
+				 * no future attempts will ever succeed.
+				 * In this case we set a persistent bit so
+				 * that we don't bother with the ioctl in the
+				 * future.
+				 */
+				vd->vdev_nowritecache = B_TRUE;
+			}
+			zio->io_error = error;
+
+			break;
+
+		default:
+			zio->io_error = ENOTSUP;
+		}
+
+		return (ZIO_PIPELINE_CONTINUE);
+	}
+
+	vdb = kmem_alloc(sizeof (vdev_disk_buf_t), KM_SLEEP);
+
+	vdb->vdb_io = zio;
+	bp = &vdb->vdb_buf;
+
+	bioinit(bp);
+	bp->b_flags = B_BUSY | B_NOCACHE |
+	    (zio->io_type == ZIO_TYPE_READ ? B_READ : B_WRITE);
+	if (!(zio->io_flags & (ZIO_FLAG_IO_RETRY | ZIO_FLAG_TRYHARD)))
+		bp->b_flags |= B_FAILFAST;
+	bp->b_bcount = zio->io_size;
+	bp->b_un.b_addr = zio->io_data;
+	bp->b_lblkno = lbtodb(zio->io_offset);
+	bp->b_bufsize = zio->io_size;
+	bp->b_iodone = (int (*)())vdev_disk_io_intr;
+
+	/* ldi_strategy() will return non-zero only on programming errors */
+	VERIFY(ldi_strategy(dvd->vd_lh, bp) == 0);
+
+	return (ZIO_PIPELINE_STOP);
+}
+
+static void
+vdev_disk_io_done(zio_t *zio)
+{
+	vdev_t *vd = zio->io_vd;
+
+	/*
+	 * If the device returned EIO, then attempt a DKIOCSTATE ioctl to see if
+	 * the device has been removed.  If this is the case, then we trigger an
+	 * asynchronous removal of the device. Otherwise, probe the device and
+	 * make sure it's still accessible.
+	 */
+	if (zio->io_error == EIO && !vd->vdev_remove_wanted) {
+		vdev_disk_t *dvd = vd->vdev_tsd;
+		int state = DKIO_NONE;
+
+		if (ldi_ioctl(dvd->vd_lh, DKIOCSTATE, (intptr_t)&state,
+		    FKIOCTL, kcred, NULL) == 0 && state != DKIO_INSERTED) {
+			/*
+			 * We post the resource as soon as possible, instead of
+			 * when the async removal actually happens, because the
+			 * DE is using this information to discard previous I/O
+			 * errors.
+			 */
+			zfs_post_remove(zio->io_spa, vd);
+			vd->vdev_remove_wanted = B_TRUE;
+			spa_async_request(zio->io_spa, SPA_ASYNC_REMOVE);
+		} else if (!vd->vdev_delayed_close) {
+			vd->vdev_delayed_close = B_TRUE;
+		}
+	}
+}
+
+vdev_ops_t vdev_disk_ops = {
+	vdev_disk_open,
+	vdev_disk_close,
+	vdev_default_asize,
+	vdev_disk_io_start,
+	vdev_disk_io_done,
+	NULL,
+	vdev_disk_hold,
+	vdev_disk_rele,
+	VDEV_TYPE_DISK,		/* name of this vdev type */
+	B_TRUE			/* leaf vdev */
+};
+
+/*
+ * Given the root disk device devid or pathname, read the label from
+ * the device, and construct a configuration nvlist.
+ */
+int
+vdev_disk_read_rootlabel(char *devpath, char *devid, nvlist_t **config)
+{
+	ldi_handle_t vd_lh;
+	vdev_label_t *label;
+	uint64_t s, size;
+	int l;
+	ddi_devid_t tmpdevid;
+	int error = -1;
+	char *minor_name;
+
+	/*
+	 * Read the device label and build the nvlist.
+	 */
+	if (devid != NULL && ddi_devid_str_decode(devid, &tmpdevid,
+	    &minor_name) == 0) {
+		error = ldi_open_by_devid(tmpdevid, minor_name,
+		    FREAD, kcred, &vd_lh, zfs_li);
+		ddi_devid_free(tmpdevid);
+		ddi_devid_str_free(minor_name);
+	}
+
+	if (error && (error = ldi_open_by_name(devpath, FREAD, kcred, &vd_lh,
+	    zfs_li)))
+		return (error);
+
+	if (ldi_get_size(vd_lh, &s)) {
+		(void) ldi_close(vd_lh, FREAD, kcred);
+		return (EIO);
+	}
+
+	size = P2ALIGN_TYPED(s, sizeof (vdev_label_t), uint64_t);
+	label = kmem_alloc(sizeof (vdev_label_t), KM_SLEEP);
+
+	*config = NULL;
+	for (l = 0; l < VDEV_LABELS; l++) {
+		uint64_t offset, state, txg = 0;
+
+		/* read vdev label */
+		offset = vdev_label_offset(size, l, 0);
+		if (vdev_disk_physio(vd_lh, (caddr_t)label,
+		    VDEV_SKIP_SIZE + VDEV_PHYS_SIZE, offset, B_READ) != 0)
+			continue;
+
+		if (nvlist_unpack(label->vl_vdev_phys.vp_nvlist,
+		    sizeof (label->vl_vdev_phys.vp_nvlist), config, 0) != 0) {
+			*config = NULL;
+			continue;
+		}
+
+		if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE,
+		    &state) != 0 || state >= POOL_STATE_DESTROYED) {
+			nvlist_free(*config);
+			*config = NULL;
+			continue;
+		}
+
+		if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG,
+		    &txg) != 0 || txg == 0) {
+			nvlist_free(*config);
+			*config = NULL;
+			continue;
+		}
+
+		break;
+	}
+
+	kmem_free(label, sizeof (vdev_label_t));
+	(void) ldi_close(vd_lh, FREAD, kcred);
+	if (*config == NULL)
+		error = EIDRM;
+
+	return (error);
+}
diff --git a/uts/common/fs/zfs/vdev_file.c b/uts/common/fs/zfs/vdev_file.c
new file mode 100644
index 000000000000..8c22aa5316a1
--- /dev/null
+++ b/uts/common/fs/zfs/vdev_file.c
@@ -0,0 +1,217 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/vdev_file.h>
+#include <sys/vdev_impl.h>
+#include <sys/zio.h>
+#include <sys/fs/zfs.h>
+#include <sys/fm/fs/zfs.h>
+
+/*
+ * Virtual device vector for files.
+ */
+
+static void
+vdev_file_hold(vdev_t *vd)
+{
+	ASSERT(vd->vdev_path != NULL);
+}
+
+static void
+vdev_file_rele(vdev_t *vd)
+{
+	ASSERT(vd->vdev_path != NULL);
+}
+
+static int
+vdev_file_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
+{
+	vdev_file_t *vf;
+	vnode_t *vp;
+	vattr_t vattr;
+	int error;
+
+	/*
+	 * We must have a pathname, and it must be absolute.
+	 */
+	if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
+		vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
+		return (EINVAL);
+	}
+
+	/*
+	 * Reopen the device if it's not currently open.  Otherwise,
+	 * just update the physical size of the device.
+	 */
+	if (vd->vdev_tsd != NULL) {
+		ASSERT(vd->vdev_reopening);
+		vf = vd->vdev_tsd;
+		goto skip_open;
+	}
+
+	vf = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_file_t), KM_SLEEP);
+
+	/*
+	 * We always open the files from the root of the global zone, even if
+	 * we're in a local zone.  If the user has gotten to this point, the
+	 * administrator has already decided that the pool should be available
+	 * to local zone users, so the underlying devices should be as well.
+	 */
+	ASSERT(vd->vdev_path != NULL && vd->vdev_path[0] == '/');
+	error = vn_openat(vd->vdev_path + 1, UIO_SYSSPACE,
+	    spa_mode(vd->vdev_spa) | FOFFMAX, 0, &vp, 0, 0, rootdir, -1);
+
+	if (error) {
+		vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
+		return (error);
+	}
+
+	vf->vf_vnode = vp;
+
+#ifdef _KERNEL
+	/*
+	 * Make sure it's a regular file.
+	 */
+	if (vp->v_type != VREG) {
+		vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
+		return (ENODEV);
+	}
+#endif
+
+skip_open:
+	/*
+	 * Determine the physical size of the file.
+	 */
+	vattr.va_mask = AT_SIZE;
+	error = VOP_GETATTR(vf->vf_vnode, &vattr, 0, kcred, NULL);
+	if (error) {
+		vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
+		return (error);
+	}
+
+	*psize = vattr.va_size;
+	*ashift = SPA_MINBLOCKSHIFT;
+
+	return (0);
+}
+
+static void
+vdev_file_close(vdev_t *vd)
+{
+	vdev_file_t *vf = vd->vdev_tsd;
+
+	if (vd->vdev_reopening || vf == NULL)
+		return;
+
+	if (vf->vf_vnode != NULL) {
+		(void) VOP_PUTPAGE(vf->vf_vnode, 0, 0, B_INVAL, kcred, NULL);
+		(void) VOP_CLOSE(vf->vf_vnode, spa_mode(vd->vdev_spa), 1, 0,
+		    kcred, NULL);
+		VN_RELE(vf->vf_vnode);
+	}
+
+	vd->vdev_delayed_close = B_FALSE;
+	kmem_free(vf, sizeof (vdev_file_t));
+	vd->vdev_tsd = NULL;
+}
+
+static int
+vdev_file_io_start(zio_t *zio)
+{
+	vdev_t *vd = zio->io_vd;
+	vdev_file_t *vf = vd->vdev_tsd;
+	ssize_t resid;
+
+	if (zio->io_type == ZIO_TYPE_IOCTL) {
+		/* XXPOLICY */
+		if (!vdev_readable(vd)) {
+			zio->io_error = ENXIO;
+			return (ZIO_PIPELINE_CONTINUE);
+		}
+
+		switch (zio->io_cmd) {
+		case DKIOCFLUSHWRITECACHE:
+			zio->io_error = VOP_FSYNC(vf->vf_vnode, FSYNC | FDSYNC,
+			    kcred, NULL);
+			break;
+		default:
+			zio->io_error = ENOTSUP;
+		}
+
+		return (ZIO_PIPELINE_CONTINUE);
+	}
+
+	zio->io_error = vn_rdwr(zio->io_type == ZIO_TYPE_READ ?
+	    UIO_READ : UIO_WRITE, vf->vf_vnode, zio->io_data,
+	    zio->io_size, zio->io_offset, UIO_SYSSPACE,
+	    0, RLIM64_INFINITY, kcred, &resid);
+
+	if (resid != 0 && zio->io_error == 0)
+		zio->io_error = ENOSPC;
+
+	zio_interrupt(zio);
+
+	return (ZIO_PIPELINE_STOP);
+}
+
+/* ARGSUSED */
+static void
+vdev_file_io_done(zio_t *zio)
+{
+}
+
+vdev_ops_t vdev_file_ops = {
+	vdev_file_open,
+	vdev_file_close,
+	vdev_default_asize,
+	vdev_file_io_start,
+	vdev_file_io_done,
+	NULL,
+	vdev_file_hold,
+	vdev_file_rele,
+	VDEV_TYPE_FILE,		/* name of this vdev type */
+	B_TRUE			/* leaf vdev */
+};
+
+/*
+ * From userland we access disks just like files.
+ */
+#ifndef _KERNEL
+
+vdev_ops_t vdev_disk_ops = {
+	vdev_file_open,
+	vdev_file_close,
+	vdev_default_asize,
+	vdev_file_io_start,
+	vdev_file_io_done,
+	NULL,
+	vdev_file_hold,
+	vdev_file_rele,
+	VDEV_TYPE_DISK,		/* name of this vdev type */
+	B_TRUE			/* leaf vdev */
+};
+
+#endif
diff --git a/uts/common/fs/zfs/vdev_label.c b/uts/common/fs/zfs/vdev_label.c
new file mode 100644
index 000000000000..c08ed8ba0467
--- /dev/null
+++ b/uts/common/fs/zfs/vdev_label.c
@@ -0,0 +1,1216 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * Virtual Device Labels
+ * ---------------------
+ *
+ * The vdev label serves several distinct purposes:
+ *
+ *	1. Uniquely identify this device as part of a ZFS pool and confirm its
+ *	   identity within the pool.
+ *
+ * 	2. Verify that all the devices given in a configuration are present
+ *         within the pool.
+ *
+ * 	3. Determine the uberblock for the pool.
+ *
+ * 	4. In case of an import operation, determine the configuration of the
+ *         toplevel vdev of which it is a part.
+ *
+ * 	5. If an import operation cannot find all the devices in the pool,
+ *         provide enough information to the administrator to determine which
+ *         devices are missing.
+ *
+ * It is important to note that while the kernel is responsible for writing the
+ * label, it only consumes the information in the first three cases.  The
+ * latter information is only consumed in userland when determining the
+ * configuration to import a pool.
+ *
+ *
+ * Label Organization
+ * ------------------
+ *
+ * Before describing the contents of the label, it's important to understand how
+ * the labels are written and updated with respect to the uberblock.
+ *
+ * When the pool configuration is altered, either because it was newly created
+ * or a device was added, we want to update all the labels such that we can deal
+ * with fatal failure at any point.  To this end, each disk has two labels which
+ * are updated before and after the uberblock is synced.  Assuming we have
+ * labels and an uberblock with the following transaction groups:
+ *
+ *              L1          UB          L2
+ *           +------+    +------+    +------+
+ *           |      |    |      |    |      |
+ *           | t10  |    | t10  |    | t10  |
+ *           |      |    |      |    |      |
+ *           +------+    +------+    +------+
+ *
+ * In this stable state, the labels and the uberblock were all updated within
+ * the same transaction group (10).  Each label is mirrored and checksummed, so
+ * that we can detect when we fail partway through writing the label.
+ *
+ * In order to identify which labels are valid, the labels are written in the
+ * following manner:
+ *
+ * 	1. For each vdev, update 'L1' to the new label
+ * 	2. Update the uberblock
+ * 	3. For each vdev, update 'L2' to the new label
+ *
+ * Given arbitrary failure, we can determine the correct label to use based on
+ * the transaction group.  If we fail after updating L1 but before updating the
+ * UB, we will notice that L1's transaction group is greater than the uberblock,
+ * so L2 must be valid.  If we fail after writing the uberblock but before
+ * writing L2, we will notice that L2's transaction group is less than L1, and
+ * therefore L1 is valid.
+ *
+ * Another added complexity is that not every label is updated when the config
+ * is synced.  If we add a single device, we do not want to have to re-write
+ * every label for every device in the pool.  This means that both L1 and L2 may
+ * be older than the pool uberblock, because the necessary information is stored
+ * on another vdev.
+ *
+ *
+ * On-disk Format
+ * --------------
+ *
+ * The vdev label consists of two distinct parts, and is wrapped within the
+ * vdev_label_t structure.  The label includes 8k of padding to permit legacy
+ * VTOC disk labels, but is otherwise ignored.
+ *
+ * The first half of the label is a packed nvlist which contains pool wide
+ * properties, per-vdev properties, and configuration information.  It is
+ * described in more detail below.
+ *
+ * The latter half of the label consists of a redundant array of uberblocks.
+ * These uberblocks are updated whenever a transaction group is committed,
+ * or when the configuration is updated.  When a pool is loaded, we scan each
+ * vdev for the 'best' uberblock.
+ *
+ *
+ * Configuration Information
+ * -------------------------
+ *
+ * The nvlist describing the pool and vdev contains the following elements:
+ *
+ * 	version		ZFS on-disk version
+ * 	name		Pool name
+ * 	state		Pool state
+ * 	txg		Transaction group in which this label was written
+ * 	pool_guid	Unique identifier for this pool
+ * 	vdev_tree	An nvlist describing vdev tree.
+ *
+ * Each leaf device label also contains the following:
+ *
+ * 	top_guid	Unique ID for top-level vdev in which this is contained
+ * 	guid		Unique ID for the leaf vdev
+ *
+ * The 'vs' configuration follows the format described in 'spa_config.c'.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/spa_impl.h>
+#include <sys/dmu.h>
+#include <sys/zap.h>
+#include <sys/vdev.h>
+#include <sys/vdev_impl.h>
+#include <sys/uberblock_impl.h>
+#include <sys/metaslab.h>
+#include <sys/zio.h>
+#include <sys/dsl_scan.h>
+#include <sys/fs/zfs.h>
+
+/*
+ * Basic routines to read and write from a vdev label.
+ * Used throughout the rest of this file.
+ */
+uint64_t
+vdev_label_offset(uint64_t psize, int l, uint64_t offset)
+{
+	ASSERT(offset < sizeof (vdev_label_t));
+	ASSERT(P2PHASE_TYPED(psize, sizeof (vdev_label_t), uint64_t) == 0);
+
+	return (offset + l * sizeof (vdev_label_t) + (l < VDEV_LABELS / 2 ?
+	    0 : psize - VDEV_LABELS * sizeof (vdev_label_t)));
+}
+
+/*
+ * Returns back the vdev label associated with the passed in offset.
+ */
+int
+vdev_label_number(uint64_t psize, uint64_t offset)
+{
+	int l;
+
+	if (offset >= psize - VDEV_LABEL_END_SIZE) {
+		offset -= psize - VDEV_LABEL_END_SIZE;
+		offset += (VDEV_LABELS / 2) * sizeof (vdev_label_t);
+	}
+	l = offset / sizeof (vdev_label_t);
+	return (l < VDEV_LABELS ? l : -1);
+}
+
+static void
+vdev_label_read(zio_t *zio, vdev_t *vd, int l, void *buf, uint64_t offset,
+	uint64_t size, zio_done_func_t *done, void *private, int flags)
+{
+	ASSERT(spa_config_held(zio->io_spa, SCL_STATE_ALL, RW_WRITER) ==
+	    SCL_STATE_ALL);
+	ASSERT(flags & ZIO_FLAG_CONFIG_WRITER);
+
+	zio_nowait(zio_read_phys(zio, vd,
+	    vdev_label_offset(vd->vdev_psize, l, offset),
+	    size, buf, ZIO_CHECKSUM_LABEL, done, private,
+	    ZIO_PRIORITY_SYNC_READ, flags, B_TRUE));
+}
+
+static void
+vdev_label_write(zio_t *zio, vdev_t *vd, int l, void *buf, uint64_t offset,
+	uint64_t size, zio_done_func_t *done, void *private, int flags)
+{
+	ASSERT(spa_config_held(zio->io_spa, SCL_ALL, RW_WRITER) == SCL_ALL ||
+	    (spa_config_held(zio->io_spa, SCL_CONFIG | SCL_STATE, RW_READER) ==
+	    (SCL_CONFIG | SCL_STATE) &&
+	    dsl_pool_sync_context(spa_get_dsl(zio->io_spa))));
+	ASSERT(flags & ZIO_FLAG_CONFIG_WRITER);
+
+	zio_nowait(zio_write_phys(zio, vd,
+	    vdev_label_offset(vd->vdev_psize, l, offset),
+	    size, buf, ZIO_CHECKSUM_LABEL, done, private,
+	    ZIO_PRIORITY_SYNC_WRITE, flags, B_TRUE));
+}
+
+/*
+ * Generate the nvlist representing this vdev's config.
+ */
+nvlist_t *
+vdev_config_generate(spa_t *spa, vdev_t *vd, boolean_t getstats,
+    vdev_config_flag_t flags)
+{
+	nvlist_t *nv = NULL;
+
+	VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	VERIFY(nvlist_add_string(nv, ZPOOL_CONFIG_TYPE,
+	    vd->vdev_ops->vdev_op_type) == 0);
+	if (!(flags & (VDEV_CONFIG_SPARE | VDEV_CONFIG_L2CACHE)))
+		VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_ID, vd->vdev_id)
+		    == 0);
+	VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_GUID, vd->vdev_guid) == 0);
+
+	if (vd->vdev_path != NULL)
+		VERIFY(nvlist_add_string(nv, ZPOOL_CONFIG_PATH,
+		    vd->vdev_path) == 0);
+
+	if (vd->vdev_devid != NULL)
+		VERIFY(nvlist_add_string(nv, ZPOOL_CONFIG_DEVID,
+		    vd->vdev_devid) == 0);
+
+	if (vd->vdev_physpath != NULL)
+		VERIFY(nvlist_add_string(nv, ZPOOL_CONFIG_PHYS_PATH,
+		    vd->vdev_physpath) == 0);
+
+	if (vd->vdev_fru != NULL)
+		VERIFY(nvlist_add_string(nv, ZPOOL_CONFIG_FRU,
+		    vd->vdev_fru) == 0);
+
+	if (vd->vdev_nparity != 0) {
+		ASSERT(strcmp(vd->vdev_ops->vdev_op_type,
+		    VDEV_TYPE_RAIDZ) == 0);
+
+		/*
+		 * Make sure someone hasn't managed to sneak a fancy new vdev
+		 * into a crufty old storage pool.
+		 */
+		ASSERT(vd->vdev_nparity == 1 ||
+		    (vd->vdev_nparity <= 2 &&
+		    spa_version(spa) >= SPA_VERSION_RAIDZ2) ||
+		    (vd->vdev_nparity <= 3 &&
+		    spa_version(spa) >= SPA_VERSION_RAIDZ3));
+
+		/*
+		 * Note that we'll add the nparity tag even on storage pools
+		 * that only support a single parity device -- older software
+		 * will just ignore it.
+		 */
+		VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_NPARITY,
+		    vd->vdev_nparity) == 0);
+	}
+
+	if (vd->vdev_wholedisk != -1ULL)
+		VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK,
+		    vd->vdev_wholedisk) == 0);
+
+	if (vd->vdev_not_present)
+		VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, 1) == 0);
+
+	if (vd->vdev_isspare)
+		VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_IS_SPARE, 1) == 0);
+
+	if (!(flags & (VDEV_CONFIG_SPARE | VDEV_CONFIG_L2CACHE)) &&
+	    vd == vd->vdev_top) {
+		VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY,
+		    vd->vdev_ms_array) == 0);
+		VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT,
+		    vd->vdev_ms_shift) == 0);
+		VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_ASHIFT,
+		    vd->vdev_ashift) == 0);
+		VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_ASIZE,
+		    vd->vdev_asize) == 0);
+		VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_IS_LOG,
+		    vd->vdev_islog) == 0);
+		if (vd->vdev_removing)
+			VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_REMOVING,
+			    vd->vdev_removing) == 0);
+	}
+
+	if (vd->vdev_dtl_smo.smo_object != 0)
+		VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_DTL,
+		    vd->vdev_dtl_smo.smo_object) == 0);
+
+	if (vd->vdev_crtxg)
+		VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_CREATE_TXG,
+		    vd->vdev_crtxg) == 0);
+
+	if (getstats) {
+		vdev_stat_t vs;
+		pool_scan_stat_t ps;
+
+		vdev_get_stats(vd, &vs);
+		VERIFY(nvlist_add_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS,
+		    (uint64_t *)&vs, sizeof (vs) / sizeof (uint64_t)) == 0);
+
+		/* provide either current or previous scan information */
+		if (spa_scan_get_stats(spa, &ps) == 0) {
+			VERIFY(nvlist_add_uint64_array(nv,
+			    ZPOOL_CONFIG_SCAN_STATS, (uint64_t *)&ps,
+			    sizeof (pool_scan_stat_t) / sizeof (uint64_t))
+			    == 0);
+		}
+	}
+
+	if (!vd->vdev_ops->vdev_op_leaf) {
+		nvlist_t **child;
+		int c, idx;
+
+		ASSERT(!vd->vdev_ishole);
+
+		child = kmem_alloc(vd->vdev_children * sizeof (nvlist_t *),
+		    KM_SLEEP);
+
+		for (c = 0, idx = 0; c < vd->vdev_children; c++) {
+			vdev_t *cvd = vd->vdev_child[c];
+
+			/*
+			 * If we're generating an nvlist of removing
+			 * vdevs then skip over any device which is
+			 * not being removed.
+			 */
+			if ((flags & VDEV_CONFIG_REMOVING) &&
+			    !cvd->vdev_removing)
+				continue;
+
+			child[idx++] = vdev_config_generate(spa, cvd,
+			    getstats, flags);
+		}
+
+		if (idx) {
+			VERIFY(nvlist_add_nvlist_array(nv,
+			    ZPOOL_CONFIG_CHILDREN, child, idx) == 0);
+		}
+
+		for (c = 0; c < idx; c++)
+			nvlist_free(child[c]);
+
+		kmem_free(child, vd->vdev_children * sizeof (nvlist_t *));
+
+	} else {
+		const char *aux = NULL;
+
+		if (vd->vdev_offline && !vd->vdev_tmpoffline)
+			VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_OFFLINE,
+			    B_TRUE) == 0);
+		if (vd->vdev_resilvering)
+			VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_RESILVERING,
+			    B_TRUE) == 0);
+		if (vd->vdev_faulted)
+			VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_FAULTED,
+			    B_TRUE) == 0);
+		if (vd->vdev_degraded)
+			VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_DEGRADED,
+			    B_TRUE) == 0);
+		if (vd->vdev_removed)
+			VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_REMOVED,
+			    B_TRUE) == 0);
+		if (vd->vdev_unspare)
+			VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_UNSPARE,
+			    B_TRUE) == 0);
+		if (vd->vdev_ishole)
+			VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_IS_HOLE,
+			    B_TRUE) == 0);
+
+		switch (vd->vdev_stat.vs_aux) {
+		case VDEV_AUX_ERR_EXCEEDED:
+			aux = "err_exceeded";
+			break;
+
+		case VDEV_AUX_EXTERNAL:
+			aux = "external";
+			break;
+		}
+
+		if (aux != NULL)
+			VERIFY(nvlist_add_string(nv, ZPOOL_CONFIG_AUX_STATE,
+			    aux) == 0);
+
+		if (vd->vdev_splitting && vd->vdev_orig_guid != 0LL) {
+			VERIFY(nvlist_add_uint64(nv, ZPOOL_CONFIG_ORIG_GUID,
+			    vd->vdev_orig_guid) == 0);
+		}
+	}
+
+	return (nv);
+}
+
+/*
+ * Generate a view of the top-level vdevs.  If we currently have holes
+ * in the namespace, then generate an array which contains a list of holey
+ * vdevs.  Additionally, add the number of top-level children that currently
+ * exist.
+ */
+void
+vdev_top_config_generate(spa_t *spa, nvlist_t *config)
+{
+	vdev_t *rvd = spa->spa_root_vdev;
+	uint64_t *array;
+	uint_t c, idx;
+
+	array = kmem_alloc(rvd->vdev_children * sizeof (uint64_t), KM_SLEEP);
+
+	for (c = 0, idx = 0; c < rvd->vdev_children; c++) {
+		vdev_t *tvd = rvd->vdev_child[c];
+
+		if (tvd->vdev_ishole)
+			array[idx++] = c;
+	}
+
+	if (idx) {
+		VERIFY(nvlist_add_uint64_array(config, ZPOOL_CONFIG_HOLE_ARRAY,
+		    array, idx) == 0);
+	}
+
+	VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN,
+	    rvd->vdev_children) == 0);
+
+	kmem_free(array, rvd->vdev_children * sizeof (uint64_t));
+}
+
+nvlist_t *
+vdev_label_read_config(vdev_t *vd)
+{
+	spa_t *spa = vd->vdev_spa;
+	nvlist_t *config = NULL;
+	vdev_phys_t *vp;
+	zio_t *zio;
+	int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL |
+	    ZIO_FLAG_SPECULATIVE;
+
+	ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
+
+	if (!vdev_readable(vd))
+		return (NULL);
+
+	vp = zio_buf_alloc(sizeof (vdev_phys_t));
+
+retry:
+	for (int l = 0; l < VDEV_LABELS; l++) {
+
+		zio = zio_root(spa, NULL, NULL, flags);
+
+		vdev_label_read(zio, vd, l, vp,
+		    offsetof(vdev_label_t, vl_vdev_phys),
+		    sizeof (vdev_phys_t), NULL, NULL, flags);
+
+		if (zio_wait(zio) == 0 &&
+		    nvlist_unpack(vp->vp_nvlist, sizeof (vp->vp_nvlist),
+		    &config, 0) == 0)
+			break;
+
+		if (config != NULL) {
+			nvlist_free(config);
+			config = NULL;
+		}
+	}
+
+	if (config == NULL && !(flags & ZIO_FLAG_TRYHARD)) {
+		flags |= ZIO_FLAG_TRYHARD;
+		goto retry;
+	}
+
+	zio_buf_free(vp, sizeof (vdev_phys_t));
+
+	return (config);
+}
+
+/*
+ * Determine if a device is in use.  The 'spare_guid' parameter will be filled
+ * in with the device guid if this spare is active elsewhere on the system.
+ */
+static boolean_t
+vdev_inuse(vdev_t *vd, uint64_t crtxg, vdev_labeltype_t reason,
+    uint64_t *spare_guid, uint64_t *l2cache_guid)
+{
+	spa_t *spa = vd->vdev_spa;
+	uint64_t state, pool_guid, device_guid, txg, spare_pool;
+	uint64_t vdtxg = 0;
+	nvlist_t *label;
+
+	if (spare_guid)
+		*spare_guid = 0ULL;
+	if (l2cache_guid)
+		*l2cache_guid = 0ULL;
+
+	/*
+	 * Read the label, if any, and perform some basic sanity checks.
+	 */
+	if ((label = vdev_label_read_config(vd)) == NULL)
+		return (B_FALSE);
+
+	(void) nvlist_lookup_uint64(label, ZPOOL_CONFIG_CREATE_TXG,
+	    &vdtxg);
+
+	if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE,
+	    &state) != 0 ||
+	    nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID,
+	    &device_guid) != 0) {
+		nvlist_free(label);
+		return (B_FALSE);
+	}
+
+	if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE &&
+	    (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID,
+	    &pool_guid) != 0 ||
+	    nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG,
+	    &txg) != 0)) {
+		nvlist_free(label);
+		return (B_FALSE);
+	}
+
+	nvlist_free(label);
+
+	/*
+	 * Check to see if this device indeed belongs to the pool it claims to
+	 * be a part of.  The only way this is allowed is if the device is a hot
+	 * spare (which we check for later on).
+	 */
+	if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE &&
+	    !spa_guid_exists(pool_guid, device_guid) &&
+	    !spa_spare_exists(device_guid, NULL, NULL) &&
+	    !spa_l2cache_exists(device_guid, NULL))
+		return (B_FALSE);
+
+	/*
+	 * If the transaction group is zero, then this an initialized (but
+	 * unused) label.  This is only an error if the create transaction
+	 * on-disk is the same as the one we're using now, in which case the
+	 * user has attempted to add the same vdev multiple times in the same
+	 * transaction.
+	 */
+	if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE &&
+	    txg == 0 && vdtxg == crtxg)
+		return (B_TRUE);
+
+	/*
+	 * Check to see if this is a spare device.  We do an explicit check for
+	 * spa_has_spare() here because it may be on our pending list of spares
+	 * to add.  We also check if it is an l2cache device.
+	 */
+	if (spa_spare_exists(device_guid, &spare_pool, NULL) ||
+	    spa_has_spare(spa, device_guid)) {
+		if (spare_guid)
+			*spare_guid = device_guid;
+
+		switch (reason) {
+		case VDEV_LABEL_CREATE:
+		case VDEV_LABEL_L2CACHE:
+			return (B_TRUE);
+
+		case VDEV_LABEL_REPLACE:
+			return (!spa_has_spare(spa, device_guid) ||
+			    spare_pool != 0ULL);
+
+		case VDEV_LABEL_SPARE:
+			return (spa_has_spare(spa, device_guid));
+		}
+	}
+
+	/*
+	 * Check to see if this is an l2cache device.
+	 */
+	if (spa_l2cache_exists(device_guid, NULL))
+		return (B_TRUE);
+
+	/*
+	 * We can't rely on a pool's state if it's been imported
+	 * read-only.  Instead we look to see if the pools is marked
+	 * read-only in the namespace and set the state to active.
+	 */
+	if ((spa = spa_by_guid(pool_guid, device_guid)) != NULL &&
+	    spa_mode(spa) == FREAD)
+		state = POOL_STATE_ACTIVE;
+
+	/*
+	 * If the device is marked ACTIVE, then this device is in use by another
+	 * pool on the system.
+	 */
+	return (state == POOL_STATE_ACTIVE);
+}
+
+/*
+ * Initialize a vdev label.  We check to make sure each leaf device is not in
+ * use, and writable.  We put down an initial label which we will later
+ * overwrite with a complete label.  Note that it's important to do this
+ * sequentially, not in parallel, so that we catch cases of multiple use of the
+ * same leaf vdev in the vdev we're creating -- e.g. mirroring a disk with
+ * itself.
+ */
+int
+vdev_label_init(vdev_t *vd, uint64_t crtxg, vdev_labeltype_t reason)
+{
+	spa_t *spa = vd->vdev_spa;
+	nvlist_t *label;
+	vdev_phys_t *vp;
+	char *pad2;
+	uberblock_t *ub;
+	zio_t *zio;
+	char *buf;
+	size_t buflen;
+	int error;
+	uint64_t spare_guid, l2cache_guid;
+	int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL;
+
+	ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		if ((error = vdev_label_init(vd->vdev_child[c],
+		    crtxg, reason)) != 0)
+			return (error);
+
+	/* Track the creation time for this vdev */
+	vd->vdev_crtxg = crtxg;
+
+	if (!vd->vdev_ops->vdev_op_leaf)
+		return (0);
+
+	/*
+	 * Dead vdevs cannot be initialized.
+	 */
+	if (vdev_is_dead(vd))
+		return (EIO);
+
+	/*
+	 * Determine if the vdev is in use.
+	 */
+	if (reason != VDEV_LABEL_REMOVE && reason != VDEV_LABEL_SPLIT &&
+	    vdev_inuse(vd, crtxg, reason, &spare_guid, &l2cache_guid))
+		return (EBUSY);
+
+	/*
+	 * If this is a request to add or replace a spare or l2cache device
+	 * that is in use elsewhere on the system, then we must update the
+	 * guid (which was initialized to a random value) to reflect the
+	 * actual GUID (which is shared between multiple pools).
+	 */
+	if (reason != VDEV_LABEL_REMOVE && reason != VDEV_LABEL_L2CACHE &&
+	    spare_guid != 0ULL) {
+		uint64_t guid_delta = spare_guid - vd->vdev_guid;
+
+		vd->vdev_guid += guid_delta;
+
+		for (vdev_t *pvd = vd; pvd != NULL; pvd = pvd->vdev_parent)
+			pvd->vdev_guid_sum += guid_delta;
+
+		/*
+		 * If this is a replacement, then we want to fallthrough to the
+		 * rest of the code.  If we're adding a spare, then it's already
+		 * labeled appropriately and we can just return.
+		 */
+		if (reason == VDEV_LABEL_SPARE)
+			return (0);
+		ASSERT(reason == VDEV_LABEL_REPLACE ||
+		    reason == VDEV_LABEL_SPLIT);
+	}
+
+	if (reason != VDEV_LABEL_REMOVE && reason != VDEV_LABEL_SPARE &&
+	    l2cache_guid != 0ULL) {
+		uint64_t guid_delta = l2cache_guid - vd->vdev_guid;
+
+		vd->vdev_guid += guid_delta;
+
+		for (vdev_t *pvd = vd; pvd != NULL; pvd = pvd->vdev_parent)
+			pvd->vdev_guid_sum += guid_delta;
+
+		/*
+		 * If this is a replacement, then we want to fallthrough to the
+		 * rest of the code.  If we're adding an l2cache, then it's
+		 * already labeled appropriately and we can just return.
+		 */
+		if (reason == VDEV_LABEL_L2CACHE)
+			return (0);
+		ASSERT(reason == VDEV_LABEL_REPLACE);
+	}
+
+	/*
+	 * Initialize its label.
+	 */
+	vp = zio_buf_alloc(sizeof (vdev_phys_t));
+	bzero(vp, sizeof (vdev_phys_t));
+
+	/*
+	 * Generate a label describing the pool and our top-level vdev.
+	 * We mark it as being from txg 0 to indicate that it's not
+	 * really part of an active pool just yet.  The labels will
+	 * be written again with a meaningful txg by spa_sync().
+	 */
+	if (reason == VDEV_LABEL_SPARE ||
+	    (reason == VDEV_LABEL_REMOVE && vd->vdev_isspare)) {
+		/*
+		 * For inactive hot spares, we generate a special label that
+		 * identifies as a mutually shared hot spare.  We write the
+		 * label if we are adding a hot spare, or if we are removing an
+		 * active hot spare (in which case we want to revert the
+		 * labels).
+		 */
+		VERIFY(nvlist_alloc(&label, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+		VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_VERSION,
+		    spa_version(spa)) == 0);
+		VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_POOL_STATE,
+		    POOL_STATE_SPARE) == 0);
+		VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_GUID,
+		    vd->vdev_guid) == 0);
+	} else if (reason == VDEV_LABEL_L2CACHE ||
+	    (reason == VDEV_LABEL_REMOVE && vd->vdev_isl2cache)) {
+		/*
+		 * For level 2 ARC devices, add a special label.
+		 */
+		VERIFY(nvlist_alloc(&label, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+		VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_VERSION,
+		    spa_version(spa)) == 0);
+		VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_POOL_STATE,
+		    POOL_STATE_L2CACHE) == 0);
+		VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_GUID,
+		    vd->vdev_guid) == 0);
+	} else {
+		uint64_t txg = 0ULL;
+
+		if (reason == VDEV_LABEL_SPLIT)
+			txg = spa->spa_uberblock.ub_txg;
+		label = spa_config_generate(spa, vd, txg, B_FALSE);
+
+		/*
+		 * Add our creation time.  This allows us to detect multiple
+		 * vdev uses as described above, and automatically expires if we
+		 * fail.
+		 */
+		VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_CREATE_TXG,
+		    crtxg) == 0);
+	}
+
+	buf = vp->vp_nvlist;
+	buflen = sizeof (vp->vp_nvlist);
+
+	error = nvlist_pack(label, &buf, &buflen, NV_ENCODE_XDR, KM_SLEEP);
+	if (error != 0) {
+		nvlist_free(label);
+		zio_buf_free(vp, sizeof (vdev_phys_t));
+		/* EFAULT means nvlist_pack ran out of room */
+		return (error == EFAULT ? ENAMETOOLONG : EINVAL);
+	}
+
+	/*
+	 * Initialize uberblock template.
+	 */
+	ub = zio_buf_alloc(VDEV_UBERBLOCK_RING);
+	bzero(ub, VDEV_UBERBLOCK_RING);
+	*ub = spa->spa_uberblock;
+	ub->ub_txg = 0;
+
+	/* Initialize the 2nd padding area. */
+	pad2 = zio_buf_alloc(VDEV_PAD_SIZE);
+	bzero(pad2, VDEV_PAD_SIZE);
+
+	/*
+	 * Write everything in parallel.
+	 */
+retry:
+	zio = zio_root(spa, NULL, NULL, flags);
+
+	for (int l = 0; l < VDEV_LABELS; l++) {
+
+		vdev_label_write(zio, vd, l, vp,
+		    offsetof(vdev_label_t, vl_vdev_phys),
+		    sizeof (vdev_phys_t), NULL, NULL, flags);
+
+		/*
+		 * Skip the 1st padding area.
+		 * Zero out the 2nd padding area where it might have
+		 * left over data from previous filesystem format.
+		 */
+		vdev_label_write(zio, vd, l, pad2,
+		    offsetof(vdev_label_t, vl_pad2),
+		    VDEV_PAD_SIZE, NULL, NULL, flags);
+
+		vdev_label_write(zio, vd, l, ub,
+		    offsetof(vdev_label_t, vl_uberblock),
+		    VDEV_UBERBLOCK_RING, NULL, NULL, flags);
+	}
+
+	error = zio_wait(zio);
+
+	if (error != 0 && !(flags & ZIO_FLAG_TRYHARD)) {
+		flags |= ZIO_FLAG_TRYHARD;
+		goto retry;
+	}
+
+	nvlist_free(label);
+	zio_buf_free(pad2, VDEV_PAD_SIZE);
+	zio_buf_free(ub, VDEV_UBERBLOCK_RING);
+	zio_buf_free(vp, sizeof (vdev_phys_t));
+
+	/*
+	 * If this vdev hasn't been previously identified as a spare, then we
+	 * mark it as such only if a) we are labeling it as a spare, or b) it
+	 * exists as a spare elsewhere in the system.  Do the same for
+	 * level 2 ARC devices.
+	 */
+	if (error == 0 && !vd->vdev_isspare &&
+	    (reason == VDEV_LABEL_SPARE ||
+	    spa_spare_exists(vd->vdev_guid, NULL, NULL)))
+		spa_spare_add(vd);
+
+	if (error == 0 && !vd->vdev_isl2cache &&
+	    (reason == VDEV_LABEL_L2CACHE ||
+	    spa_l2cache_exists(vd->vdev_guid, NULL)))
+		spa_l2cache_add(vd);
+
+	return (error);
+}
+
+/*
+ * ==========================================================================
+ * uberblock load/sync
+ * ==========================================================================
+ */
+
+/*
+ * Consider the following situation: txg is safely synced to disk.  We've
+ * written the first uberblock for txg + 1, and then we lose power.  When we
+ * come back up, we fail to see the uberblock for txg + 1 because, say,
+ * it was on a mirrored device and the replica to which we wrote txg + 1
+ * is now offline.  If we then make some changes and sync txg + 1, and then
+ * the missing replica comes back, then for a new seconds we'll have two
+ * conflicting uberblocks on disk with the same txg.  The solution is simple:
+ * among uberblocks with equal txg, choose the one with the latest timestamp.
+ */
+static int
+vdev_uberblock_compare(uberblock_t *ub1, uberblock_t *ub2)
+{
+	if (ub1->ub_txg < ub2->ub_txg)
+		return (-1);
+	if (ub1->ub_txg > ub2->ub_txg)
+		return (1);
+
+	if (ub1->ub_timestamp < ub2->ub_timestamp)
+		return (-1);
+	if (ub1->ub_timestamp > ub2->ub_timestamp)
+		return (1);
+
+	return (0);
+}
+
+static void
+vdev_uberblock_load_done(zio_t *zio)
+{
+	spa_t *spa = zio->io_spa;
+	zio_t *rio = zio->io_private;
+	uberblock_t *ub = zio->io_data;
+	uberblock_t *ubbest = rio->io_private;
+
+	ASSERT3U(zio->io_size, ==, VDEV_UBERBLOCK_SIZE(zio->io_vd));
+
+	if (zio->io_error == 0 && uberblock_verify(ub) == 0) {
+		mutex_enter(&rio->io_lock);
+		if (ub->ub_txg <= spa->spa_load_max_txg &&
+		    vdev_uberblock_compare(ub, ubbest) > 0)
+			*ubbest = *ub;
+		mutex_exit(&rio->io_lock);
+	}
+
+	zio_buf_free(zio->io_data, zio->io_size);
+}
+
+void
+vdev_uberblock_load(zio_t *zio, vdev_t *vd, uberblock_t *ubbest)
+{
+	spa_t *spa = vd->vdev_spa;
+	vdev_t *rvd = spa->spa_root_vdev;
+	int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL |
+	    ZIO_FLAG_SPECULATIVE | ZIO_FLAG_TRYHARD;
+
+	if (vd == rvd) {
+		ASSERT(zio == NULL);
+		spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
+		zio = zio_root(spa, NULL, ubbest, flags);
+		bzero(ubbest, sizeof (uberblock_t));
+	}
+
+	ASSERT(zio != NULL);
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_uberblock_load(zio, vd->vdev_child[c], ubbest);
+
+	if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) {
+		for (int l = 0; l < VDEV_LABELS; l++) {
+			for (int n = 0; n < VDEV_UBERBLOCK_COUNT(vd); n++) {
+				vdev_label_read(zio, vd, l,
+				    zio_buf_alloc(VDEV_UBERBLOCK_SIZE(vd)),
+				    VDEV_UBERBLOCK_OFFSET(vd, n),
+				    VDEV_UBERBLOCK_SIZE(vd),
+				    vdev_uberblock_load_done, zio, flags);
+			}
+		}
+	}
+
+	if (vd == rvd) {
+		(void) zio_wait(zio);
+		spa_config_exit(spa, SCL_ALL, FTAG);
+	}
+}
+
+/*
+ * On success, increment root zio's count of good writes.
+ * We only get credit for writes to known-visible vdevs; see spa_vdev_add().
+ */
+static void
+vdev_uberblock_sync_done(zio_t *zio)
+{
+	uint64_t *good_writes = zio->io_private;
+
+	if (zio->io_error == 0 && zio->io_vd->vdev_top->vdev_ms_array != 0)
+		atomic_add_64(good_writes, 1);
+}
+
+/*
+ * Write the uberblock to all labels of all leaves of the specified vdev.
+ */
+static void
+vdev_uberblock_sync(zio_t *zio, uberblock_t *ub, vdev_t *vd, int flags)
+{
+	uberblock_t *ubbuf;
+	int n;
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_uberblock_sync(zio, ub, vd->vdev_child[c], flags);
+
+	if (!vd->vdev_ops->vdev_op_leaf)
+		return;
+
+	if (!vdev_writeable(vd))
+		return;
+
+	n = ub->ub_txg & (VDEV_UBERBLOCK_COUNT(vd) - 1);
+
+	ubbuf = zio_buf_alloc(VDEV_UBERBLOCK_SIZE(vd));
+	bzero(ubbuf, VDEV_UBERBLOCK_SIZE(vd));
+	*ubbuf = *ub;
+
+	for (int l = 0; l < VDEV_LABELS; l++)
+		vdev_label_write(zio, vd, l, ubbuf,
+		    VDEV_UBERBLOCK_OFFSET(vd, n), VDEV_UBERBLOCK_SIZE(vd),
+		    vdev_uberblock_sync_done, zio->io_private,
+		    flags | ZIO_FLAG_DONT_PROPAGATE);
+
+	zio_buf_free(ubbuf, VDEV_UBERBLOCK_SIZE(vd));
+}
+
+int
+vdev_uberblock_sync_list(vdev_t **svd, int svdcount, uberblock_t *ub, int flags)
+{
+	spa_t *spa = svd[0]->vdev_spa;
+	zio_t *zio;
+	uint64_t good_writes = 0;
+
+	zio = zio_root(spa, NULL, &good_writes, flags);
+
+	for (int v = 0; v < svdcount; v++)
+		vdev_uberblock_sync(zio, ub, svd[v], flags);
+
+	(void) zio_wait(zio);
+
+	/*
+	 * Flush the uberblocks to disk.  This ensures that the odd labels
+	 * are no longer needed (because the new uberblocks and the even
+	 * labels are safely on disk), so it is safe to overwrite them.
+	 */
+	zio = zio_root(spa, NULL, NULL, flags);
+
+	for (int v = 0; v < svdcount; v++)
+		zio_flush(zio, svd[v]);
+
+	(void) zio_wait(zio);
+
+	return (good_writes >= 1 ? 0 : EIO);
+}
+
+/*
+ * On success, increment the count of good writes for our top-level vdev.
+ */
+static void
+vdev_label_sync_done(zio_t *zio)
+{
+	uint64_t *good_writes = zio->io_private;
+
+	if (zio->io_error == 0)
+		atomic_add_64(good_writes, 1);
+}
+
+/*
+ * If there weren't enough good writes, indicate failure to the parent.
+ */
+static void
+vdev_label_sync_top_done(zio_t *zio)
+{
+	uint64_t *good_writes = zio->io_private;
+
+	if (*good_writes == 0)
+		zio->io_error = EIO;
+
+	kmem_free(good_writes, sizeof (uint64_t));
+}
+
+/*
+ * We ignore errors for log and cache devices, simply free the private data.
+ */
+static void
+vdev_label_sync_ignore_done(zio_t *zio)
+{
+	kmem_free(zio->io_private, sizeof (uint64_t));
+}
+
+/*
+ * Write all even or odd labels to all leaves of the specified vdev.
+ */
+static void
+vdev_label_sync(zio_t *zio, vdev_t *vd, int l, uint64_t txg, int flags)
+{
+	nvlist_t *label;
+	vdev_phys_t *vp;
+	char *buf;
+	size_t buflen;
+
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_label_sync(zio, vd->vdev_child[c], l, txg, flags);
+
+	if (!vd->vdev_ops->vdev_op_leaf)
+		return;
+
+	if (!vdev_writeable(vd))
+		return;
+
+	/*
+	 * Generate a label describing the top-level config to which we belong.
+	 */
+	label = spa_config_generate(vd->vdev_spa, vd, txg, B_FALSE);
+
+	vp = zio_buf_alloc(sizeof (vdev_phys_t));
+	bzero(vp, sizeof (vdev_phys_t));
+
+	buf = vp->vp_nvlist;
+	buflen = sizeof (vp->vp_nvlist);
+
+	if (nvlist_pack(label, &buf, &buflen, NV_ENCODE_XDR, KM_SLEEP) == 0) {
+		for (; l < VDEV_LABELS; l += 2) {
+			vdev_label_write(zio, vd, l, vp,
+			    offsetof(vdev_label_t, vl_vdev_phys),
+			    sizeof (vdev_phys_t),
+			    vdev_label_sync_done, zio->io_private,
+			    flags | ZIO_FLAG_DONT_PROPAGATE);
+		}
+	}
+
+	zio_buf_free(vp, sizeof (vdev_phys_t));
+	nvlist_free(label);
+}
+
+int
+vdev_label_sync_list(spa_t *spa, int l, uint64_t txg, int flags)
+{
+	list_t *dl = &spa->spa_config_dirty_list;
+	vdev_t *vd;
+	zio_t *zio;
+	int error;
+
+	/*
+	 * Write the new labels to disk.
+	 */
+	zio = zio_root(spa, NULL, NULL, flags);
+
+	for (vd = list_head(dl); vd != NULL; vd = list_next(dl, vd)) {
+		uint64_t *good_writes = kmem_zalloc(sizeof (uint64_t),
+		    KM_SLEEP);
+
+		ASSERT(!vd->vdev_ishole);
+
+		zio_t *vio = zio_null(zio, spa, NULL,
+		    (vd->vdev_islog || vd->vdev_aux != NULL) ?
+		    vdev_label_sync_ignore_done : vdev_label_sync_top_done,
+		    good_writes, flags);
+		vdev_label_sync(vio, vd, l, txg, flags);
+		zio_nowait(vio);
+	}
+
+	error = zio_wait(zio);
+
+	/*
+	 * Flush the new labels to disk.
+	 */
+	zio = zio_root(spa, NULL, NULL, flags);
+
+	for (vd = list_head(dl); vd != NULL; vd = list_next(dl, vd))
+		zio_flush(zio, vd);
+
+	(void) zio_wait(zio);
+
+	return (error);
+}
+
+/*
+ * Sync the uberblock and any changes to the vdev configuration.
+ *
+ * The order of operations is carefully crafted to ensure that
+ * if the system panics or loses power at any time, the state on disk
+ * is still transactionally consistent.  The in-line comments below
+ * describe the failure semantics at each stage.
+ *
+ * Moreover, vdev_config_sync() is designed to be idempotent: if it fails
+ * at any time, you can just call it again, and it will resume its work.
+ */
+int
+vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg, boolean_t tryhard)
+{
+	spa_t *spa = svd[0]->vdev_spa;
+	uberblock_t *ub = &spa->spa_uberblock;
+	vdev_t *vd;
+	zio_t *zio;
+	int error;
+	int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL;
+
+	/*
+	 * Normally, we don't want to try too hard to write every label and
+	 * uberblock.  If there is a flaky disk, we don't want the rest of the
+	 * sync process to block while we retry.  But if we can't write a
+	 * single label out, we should retry with ZIO_FLAG_TRYHARD before
+	 * bailing out and declaring the pool faulted.
+	 */
+	if (tryhard)
+		flags |= ZIO_FLAG_TRYHARD;
+
+	ASSERT(ub->ub_txg <= txg);
+
+	/*
+	 * If this isn't a resync due to I/O errors,
+	 * and nothing changed in this transaction group,
+	 * and the vdev configuration hasn't changed,
+	 * then there's nothing to do.
+	 */
+	if (ub->ub_txg < txg &&
+	    uberblock_update(ub, spa->spa_root_vdev, txg) == B_FALSE &&
+	    list_is_empty(&spa->spa_config_dirty_list))
+		return (0);
+
+	if (txg > spa_freeze_txg(spa))
+		return (0);
+
+	ASSERT(txg <= spa->spa_final_txg);
+
+	/*
+	 * Flush the write cache of every disk that's been written to
+	 * in this transaction group.  This ensures that all blocks
+	 * written in this txg will be committed to stable storage
+	 * before any uberblock that references them.
+	 */
+	zio = zio_root(spa, NULL, NULL, flags);
+
+	for (vd = txg_list_head(&spa->spa_vdev_txg_list, TXG_CLEAN(txg)); vd;
+	    vd = txg_list_next(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)))
+		zio_flush(zio, vd);
+
+	(void) zio_wait(zio);
+
+	/*
+	 * Sync out the even labels (L0, L2) for every dirty vdev.  If the
+	 * system dies in the middle of this process, that's OK: all of the
+	 * even labels that made it to disk will be newer than any uberblock,
+	 * and will therefore be considered invalid.  The odd labels (L1, L3),
+	 * which have not yet been touched, will still be valid.  We flush
+	 * the new labels to disk to ensure that all even-label updates
+	 * are committed to stable storage before the uberblock update.
+	 */
+	if ((error = vdev_label_sync_list(spa, 0, txg, flags)) != 0)
+		return (error);
+
+	/*
+	 * Sync the uberblocks to all vdevs in svd[].
+	 * If the system dies in the middle of this step, there are two cases
+	 * to consider, and the on-disk state is consistent either way:
+	 *
+	 * (1)	If none of the new uberblocks made it to disk, then the
+	 *	previous uberblock will be the newest, and the odd labels
+	 *	(which had not yet been touched) will be valid with respect
+	 *	to that uberblock.
+	 *
+	 * (2)	If one or more new uberblocks made it to disk, then they
+	 *	will be the newest, and the even labels (which had all
+	 *	been successfully committed) will be valid with respect
+	 *	to the new uberblocks.
+	 */
+	if ((error = vdev_uberblock_sync_list(svd, svdcount, ub, flags)) != 0)
+		return (error);
+
+	/*
+	 * Sync out odd labels for every dirty vdev.  If the system dies
+	 * in the middle of this process, the even labels and the new
+	 * uberblocks will suffice to open the pool.  The next time
+	 * the pool is opened, the first thing we'll do -- before any
+	 * user data is modified -- is mark every vdev dirty so that
+	 * all labels will be brought up to date.  We flush the new labels
+	 * to disk to ensure that all odd-label updates are committed to
+	 * stable storage before the next transaction group begins.
+	 */
+	return (vdev_label_sync_list(spa, 1, txg, flags));
+}
diff --git a/uts/common/fs/zfs/vdev_mirror.c b/uts/common/fs/zfs/vdev_mirror.c
new file mode 100644
index 000000000000..698c0275d34e
--- /dev/null
+++ b/uts/common/fs/zfs/vdev_mirror.c
@@ -0,0 +1,485 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/vdev_impl.h>
+#include <sys/zio.h>
+#include <sys/fs/zfs.h>
+
+/*
+ * Virtual device vector for mirroring.
+ */
+
+typedef struct mirror_child {
+	vdev_t		*mc_vd;
+	uint64_t	mc_offset;
+	int		mc_error;
+	uint8_t		mc_tried;
+	uint8_t		mc_skipped;
+	uint8_t		mc_speculative;
+} mirror_child_t;
+
+typedef struct mirror_map {
+	int		mm_children;
+	int		mm_replacing;
+	int		mm_preferred;
+	int		mm_root;
+	mirror_child_t	mm_child[1];
+} mirror_map_t;
+
+int vdev_mirror_shift = 21;
+
+static void
+vdev_mirror_map_free(zio_t *zio)
+{
+	mirror_map_t *mm = zio->io_vsd;
+
+	kmem_free(mm, offsetof(mirror_map_t, mm_child[mm->mm_children]));
+}
+
+static const zio_vsd_ops_t vdev_mirror_vsd_ops = {
+	vdev_mirror_map_free,
+	zio_vsd_default_cksum_report
+};
+
+static mirror_map_t *
+vdev_mirror_map_alloc(zio_t *zio)
+{
+	mirror_map_t *mm = NULL;
+	mirror_child_t *mc;
+	vdev_t *vd = zio->io_vd;
+	int c, d;
+
+	if (vd == NULL) {
+		dva_t *dva = zio->io_bp->blk_dva;
+		spa_t *spa = zio->io_spa;
+
+		c = BP_GET_NDVAS(zio->io_bp);
+
+		mm = kmem_zalloc(offsetof(mirror_map_t, mm_child[c]), KM_SLEEP);
+		mm->mm_children = c;
+		mm->mm_replacing = B_FALSE;
+		mm->mm_preferred = spa_get_random(c);
+		mm->mm_root = B_TRUE;
+
+		/*
+		 * Check the other, lower-index DVAs to see if they're on
+		 * the same vdev as the child we picked.  If they are, use
+		 * them since they are likely to have been allocated from
+		 * the primary metaslab in use at the time, and hence are
+		 * more likely to have locality with single-copy data.
+		 */
+		for (c = mm->mm_preferred, d = c - 1; d >= 0; d--) {
+			if (DVA_GET_VDEV(&dva[d]) == DVA_GET_VDEV(&dva[c]))
+				mm->mm_preferred = d;
+		}
+
+		for (c = 0; c < mm->mm_children; c++) {
+			mc = &mm->mm_child[c];
+
+			mc->mc_vd = vdev_lookup_top(spa, DVA_GET_VDEV(&dva[c]));
+			mc->mc_offset = DVA_GET_OFFSET(&dva[c]);
+		}
+	} else {
+		c = vd->vdev_children;
+
+		mm = kmem_zalloc(offsetof(mirror_map_t, mm_child[c]), KM_SLEEP);
+		mm->mm_children = c;
+		mm->mm_replacing = (vd->vdev_ops == &vdev_replacing_ops ||
+		    vd->vdev_ops == &vdev_spare_ops);
+		mm->mm_preferred = mm->mm_replacing ? 0 :
+		    (zio->io_offset >> vdev_mirror_shift) % c;
+		mm->mm_root = B_FALSE;
+
+		for (c = 0; c < mm->mm_children; c++) {
+			mc = &mm->mm_child[c];
+			mc->mc_vd = vd->vdev_child[c];
+			mc->mc_offset = zio->io_offset;
+		}
+	}
+
+	zio->io_vsd = mm;
+	zio->io_vsd_ops = &vdev_mirror_vsd_ops;
+	return (mm);
+}
+
+static int
+vdev_mirror_open(vdev_t *vd, uint64_t *asize, uint64_t *ashift)
+{
+	int numerrors = 0;
+	int lasterror = 0;
+
+	if (vd->vdev_children == 0) {
+		vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
+		return (EINVAL);
+	}
+
+	vdev_open_children(vd);
+
+	for (int c = 0; c < vd->vdev_children; c++) {
+		vdev_t *cvd = vd->vdev_child[c];
+
+		if (cvd->vdev_open_error) {
+			lasterror = cvd->vdev_open_error;
+			numerrors++;
+			continue;
+		}
+
+		*asize = MIN(*asize - 1, cvd->vdev_asize - 1) + 1;
+		*ashift = MAX(*ashift, cvd->vdev_ashift);
+	}
+
+	if (numerrors == vd->vdev_children) {
+		vd->vdev_stat.vs_aux = VDEV_AUX_NO_REPLICAS;
+		return (lasterror);
+	}
+
+	return (0);
+}
+
+static void
+vdev_mirror_close(vdev_t *vd)
+{
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_close(vd->vdev_child[c]);
+}
+
+static void
+vdev_mirror_child_done(zio_t *zio)
+{
+	mirror_child_t *mc = zio->io_private;
+
+	mc->mc_error = zio->io_error;
+	mc->mc_tried = 1;
+	mc->mc_skipped = 0;
+}
+
+static void
+vdev_mirror_scrub_done(zio_t *zio)
+{
+	mirror_child_t *mc = zio->io_private;
+
+	if (zio->io_error == 0) {
+		zio_t *pio;
+
+		mutex_enter(&zio->io_lock);
+		while ((pio = zio_walk_parents(zio)) != NULL) {
+			mutex_enter(&pio->io_lock);
+			ASSERT3U(zio->io_size, >=, pio->io_size);
+			bcopy(zio->io_data, pio->io_data, pio->io_size);
+			mutex_exit(&pio->io_lock);
+		}
+		mutex_exit(&zio->io_lock);
+	}
+
+	zio_buf_free(zio->io_data, zio->io_size);
+
+	mc->mc_error = zio->io_error;
+	mc->mc_tried = 1;
+	mc->mc_skipped = 0;
+}
+
+/*
+ * Try to find a child whose DTL doesn't contain the block we want to read.
+ * If we can't, try the read on any vdev we haven't already tried.
+ */
+static int
+vdev_mirror_child_select(zio_t *zio)
+{
+	mirror_map_t *mm = zio->io_vsd;
+	mirror_child_t *mc;
+	uint64_t txg = zio->io_txg;
+	int i, c;
+
+	ASSERT(zio->io_bp == NULL || BP_PHYSICAL_BIRTH(zio->io_bp) == txg);
+
+	/*
+	 * Try to find a child whose DTL doesn't contain the block to read.
+	 * If a child is known to be completely inaccessible (indicated by
+	 * vdev_readable() returning B_FALSE), don't even try.
+	 */
+	for (i = 0, c = mm->mm_preferred; i < mm->mm_children; i++, c++) {
+		if (c >= mm->mm_children)
+			c = 0;
+		mc = &mm->mm_child[c];
+		if (mc->mc_tried || mc->mc_skipped)
+			continue;
+		if (!vdev_readable(mc->mc_vd)) {
+			mc->mc_error = ENXIO;
+			mc->mc_tried = 1;	/* don't even try */
+			mc->mc_skipped = 1;
+			continue;
+		}
+		if (!vdev_dtl_contains(mc->mc_vd, DTL_MISSING, txg, 1))
+			return (c);
+		mc->mc_error = ESTALE;
+		mc->mc_skipped = 1;
+		mc->mc_speculative = 1;
+	}
+
+	/*
+	 * Every device is either missing or has this txg in its DTL.
+	 * Look for any child we haven't already tried before giving up.
+	 */
+	for (c = 0; c < mm->mm_children; c++)
+		if (!mm->mm_child[c].mc_tried)
+			return (c);
+
+	/*
+	 * Every child failed.  There's no place left to look.
+	 */
+	return (-1);
+}
+
+static int
+vdev_mirror_io_start(zio_t *zio)
+{
+	mirror_map_t *mm;
+	mirror_child_t *mc;
+	int c, children;
+
+	mm = vdev_mirror_map_alloc(zio);
+
+	if (zio->io_type == ZIO_TYPE_READ) {
+		if ((zio->io_flags & ZIO_FLAG_SCRUB) && !mm->mm_replacing) {
+			/*
+			 * For scrubbing reads we need to allocate a read
+			 * buffer for each child and issue reads to all
+			 * children.  If any child succeeds, it will copy its
+			 * data into zio->io_data in vdev_mirror_scrub_done.
+			 */
+			for (c = 0; c < mm->mm_children; c++) {
+				mc = &mm->mm_child[c];
+				zio_nowait(zio_vdev_child_io(zio, zio->io_bp,
+				    mc->mc_vd, mc->mc_offset,
+				    zio_buf_alloc(zio->io_size), zio->io_size,
+				    zio->io_type, zio->io_priority, 0,
+				    vdev_mirror_scrub_done, mc));
+			}
+			return (ZIO_PIPELINE_CONTINUE);
+		}
+		/*
+		 * For normal reads just pick one child.
+		 */
+		c = vdev_mirror_child_select(zio);
+		children = (c >= 0);
+	} else {
+		ASSERT(zio->io_type == ZIO_TYPE_WRITE);
+
+		/*
+		 * Writes go to all children.
+		 */
+		c = 0;
+		children = mm->mm_children;
+	}
+
+	while (children--) {
+		mc = &mm->mm_child[c];
+		zio_nowait(zio_vdev_child_io(zio, zio->io_bp,
+		    mc->mc_vd, mc->mc_offset, zio->io_data, zio->io_size,
+		    zio->io_type, zio->io_priority, 0,
+		    vdev_mirror_child_done, mc));
+		c++;
+	}
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+static int
+vdev_mirror_worst_error(mirror_map_t *mm)
+{
+	int error[2] = { 0, 0 };
+
+	for (int c = 0; c < mm->mm_children; c++) {
+		mirror_child_t *mc = &mm->mm_child[c];
+		int s = mc->mc_speculative;
+		error[s] = zio_worst_error(error[s], mc->mc_error);
+	}
+
+	return (error[0] ? error[0] : error[1]);
+}
+
+static void
+vdev_mirror_io_done(zio_t *zio)
+{
+	mirror_map_t *mm = zio->io_vsd;
+	mirror_child_t *mc;
+	int c;
+	int good_copies = 0;
+	int unexpected_errors = 0;
+
+	for (c = 0; c < mm->mm_children; c++) {
+		mc = &mm->mm_child[c];
+
+		if (mc->mc_error) {
+			if (!mc->mc_skipped)
+				unexpected_errors++;
+		} else if (mc->mc_tried) {
+			good_copies++;
+		}
+	}
+
+	if (zio->io_type == ZIO_TYPE_WRITE) {
+		/*
+		 * XXX -- for now, treat partial writes as success.
+		 *
+		 * Now that we support write reallocation, it would be better
+		 * to treat partial failure as real failure unless there are
+		 * no non-degraded top-level vdevs left, and not update DTLs
+		 * if we intend to reallocate.
+		 */
+		/* XXPOLICY */
+		if (good_copies != mm->mm_children) {
+			/*
+			 * Always require at least one good copy.
+			 *
+			 * For ditto blocks (io_vd == NULL), require
+			 * all copies to be good.
+			 *
+			 * XXX -- for replacing vdevs, there's no great answer.
+			 * If the old device is really dead, we may not even
+			 * be able to access it -- so we only want to
+			 * require good writes to the new device.  But if
+			 * the new device turns out to be flaky, we want
+			 * to be able to detach it -- which requires all
+			 * writes to the old device to have succeeded.
+			 */
+			if (good_copies == 0 || zio->io_vd == NULL)
+				zio->io_error = vdev_mirror_worst_error(mm);
+		}
+		return;
+	}
+
+	ASSERT(zio->io_type == ZIO_TYPE_READ);
+
+	/*
+	 * If we don't have a good copy yet, keep trying other children.
+	 */
+	/* XXPOLICY */
+	if (good_copies == 0 && (c = vdev_mirror_child_select(zio)) != -1) {
+		ASSERT(c >= 0 && c < mm->mm_children);
+		mc = &mm->mm_child[c];
+		zio_vdev_io_redone(zio);
+		zio_nowait(zio_vdev_child_io(zio, zio->io_bp,
+		    mc->mc_vd, mc->mc_offset, zio->io_data, zio->io_size,
+		    ZIO_TYPE_READ, zio->io_priority, 0,
+		    vdev_mirror_child_done, mc));
+		return;
+	}
+
+	/* XXPOLICY */
+	if (good_copies == 0) {
+		zio->io_error = vdev_mirror_worst_error(mm);
+		ASSERT(zio->io_error != 0);
+	}
+
+	if (good_copies && spa_writeable(zio->io_spa) &&
+	    (unexpected_errors ||
+	    (zio->io_flags & ZIO_FLAG_RESILVER) ||
+	    ((zio->io_flags & ZIO_FLAG_SCRUB) && mm->mm_replacing))) {
+		/*
+		 * Use the good data we have in hand to repair damaged children.
+		 */
+		for (c = 0; c < mm->mm_children; c++) {
+			/*
+			 * Don't rewrite known good children.
+			 * Not only is it unnecessary, it could
+			 * actually be harmful: if the system lost
+			 * power while rewriting the only good copy,
+			 * there would be no good copies left!
+			 */
+			mc = &mm->mm_child[c];
+
+			if (mc->mc_error == 0) {
+				if (mc->mc_tried)
+					continue;
+				if (!(zio->io_flags & ZIO_FLAG_SCRUB) &&
+				    !vdev_dtl_contains(mc->mc_vd, DTL_PARTIAL,
+				    zio->io_txg, 1))
+					continue;
+				mc->mc_error = ESTALE;
+			}
+
+			zio_nowait(zio_vdev_child_io(zio, zio->io_bp,
+			    mc->mc_vd, mc->mc_offset,
+			    zio->io_data, zio->io_size,
+			    ZIO_TYPE_WRITE, zio->io_priority,
+			    ZIO_FLAG_IO_REPAIR | (unexpected_errors ?
+			    ZIO_FLAG_SELF_HEAL : 0), NULL, NULL));
+		}
+	}
+}
+
+static void
+vdev_mirror_state_change(vdev_t *vd, int faulted, int degraded)
+{
+	if (faulted == vd->vdev_children)
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
+		    VDEV_AUX_NO_REPLICAS);
+	else if (degraded + faulted != 0)
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, VDEV_AUX_NONE);
+	else
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_HEALTHY, VDEV_AUX_NONE);
+}
+
+vdev_ops_t vdev_mirror_ops = {
+	vdev_mirror_open,
+	vdev_mirror_close,
+	vdev_default_asize,
+	vdev_mirror_io_start,
+	vdev_mirror_io_done,
+	vdev_mirror_state_change,
+	NULL,
+	NULL,
+	VDEV_TYPE_MIRROR,	/* name of this vdev type */
+	B_FALSE			/* not a leaf vdev */
+};
+
+vdev_ops_t vdev_replacing_ops = {
+	vdev_mirror_open,
+	vdev_mirror_close,
+	vdev_default_asize,
+	vdev_mirror_io_start,
+	vdev_mirror_io_done,
+	vdev_mirror_state_change,
+	NULL,
+	NULL,
+	VDEV_TYPE_REPLACING,	/* name of this vdev type */
+	B_FALSE			/* not a leaf vdev */
+};
+
+vdev_ops_t vdev_spare_ops = {
+	vdev_mirror_open,
+	vdev_mirror_close,
+	vdev_default_asize,
+	vdev_mirror_io_start,
+	vdev_mirror_io_done,
+	vdev_mirror_state_change,
+	NULL,
+	NULL,
+	VDEV_TYPE_SPARE,	/* name of this vdev type */
+	B_FALSE			/* not a leaf vdev */
+};
diff --git a/uts/common/fs/zfs/vdev_missing.c b/uts/common/fs/zfs/vdev_missing.c
new file mode 100644
index 000000000000..6a5588d59213
--- /dev/null
+++ b/uts/common/fs/zfs/vdev_missing.c
@@ -0,0 +1,100 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * The 'missing' vdev is a special vdev type used only during import.  It
+ * signifies a placeholder in the root vdev for some vdev that we know is
+ * missing.  We pass it down to the kernel to allow the rest of the
+ * configuration to parsed and an attempt made to open all available devices.
+ * Because its GUID is always 0, we know that the guid sum will mismatch and we
+ * won't be able to open the pool anyway.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/vdev_impl.h>
+#include <sys/fs/zfs.h>
+#include <sys/zio.h>
+
+/* ARGSUSED */
+static int
+vdev_missing_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
+{
+	/*
+	 * Really this should just fail.  But then the root vdev will be in the
+	 * faulted state with VDEV_AUX_NO_REPLICAS, when what we really want is
+	 * VDEV_AUX_BAD_GUID_SUM.  So we pretend to succeed, knowing that we
+	 * will fail the GUID sum check before ever trying to open the pool.
+	 */
+	*psize = 0;
+	*ashift = 0;
+	return (0);
+}
+
+/* ARGSUSED */
+static void
+vdev_missing_close(vdev_t *vd)
+{
+}
+
+/* ARGSUSED */
+static int
+vdev_missing_io_start(zio_t *zio)
+{
+	zio->io_error = ENOTSUP;
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+/* ARGSUSED */
+static void
+vdev_missing_io_done(zio_t *zio)
+{
+}
+
+vdev_ops_t vdev_missing_ops = {
+	vdev_missing_open,
+	vdev_missing_close,
+	vdev_default_asize,
+	vdev_missing_io_start,
+	vdev_missing_io_done,
+	NULL,
+	NULL,
+	NULL,
+	VDEV_TYPE_MISSING,	/* name of this vdev type */
+	B_TRUE			/* leaf vdev */
+};
+
+vdev_ops_t vdev_hole_ops = {
+	vdev_missing_open,
+	vdev_missing_close,
+	vdev_default_asize,
+	vdev_missing_io_start,
+	vdev_missing_io_done,
+	NULL,
+	NULL,
+	NULL,
+	VDEV_TYPE_HOLE,		/* name of this vdev type */
+	B_TRUE			/* leaf vdev */
+};
diff --git a/uts/common/fs/zfs/vdev_queue.c b/uts/common/fs/zfs/vdev_queue.c
new file mode 100644
index 000000000000..5a0d3ee97029
--- /dev/null
+++ b/uts/common/fs/zfs/vdev_queue.c
@@ -0,0 +1,406 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/vdev_impl.h>
+#include <sys/zio.h>
+#include <sys/avl.h>
+
+/*
+ * These tunables are for performance analysis.
+ */
+/*
+ * zfs_vdev_max_pending is the maximum number of i/os concurrently
+ * pending to each device.  zfs_vdev_min_pending is the initial number
+ * of i/os pending to each device (before it starts ramping up to
+ * max_pending).
+ */
+int zfs_vdev_max_pending = 10;
+int zfs_vdev_min_pending = 4;
+
+/* deadline = pri + ddi_get_lbolt64() >> time_shift) */
+int zfs_vdev_time_shift = 6;
+
+/* exponential I/O issue ramp-up rate */
+int zfs_vdev_ramp_rate = 2;
+
+/*
+ * To reduce IOPs, we aggregate small adjacent I/Os into one large I/O.
+ * For read I/Os, we also aggregate across small adjacency gaps; for writes
+ * we include spans of optional I/Os to aid aggregation at the disk even when
+ * they aren't able to help us aggregate at this level.
+ */
+int zfs_vdev_aggregation_limit = SPA_MAXBLOCKSIZE;
+int zfs_vdev_read_gap_limit = 32 << 10;
+int zfs_vdev_write_gap_limit = 4 << 10;
+
+/*
+ * Virtual device vector for disk I/O scheduling.
+ */
+int
+vdev_queue_deadline_compare(const void *x1, const void *x2)
+{
+	const zio_t *z1 = x1;
+	const zio_t *z2 = x2;
+
+	if (z1->io_deadline < z2->io_deadline)
+		return (-1);
+	if (z1->io_deadline > z2->io_deadline)
+		return (1);
+
+	if (z1->io_offset < z2->io_offset)
+		return (-1);
+	if (z1->io_offset > z2->io_offset)
+		return (1);
+
+	if (z1 < z2)
+		return (-1);
+	if (z1 > z2)
+		return (1);
+
+	return (0);
+}
+
+int
+vdev_queue_offset_compare(const void *x1, const void *x2)
+{
+	const zio_t *z1 = x1;
+	const zio_t *z2 = x2;
+
+	if (z1->io_offset < z2->io_offset)
+		return (-1);
+	if (z1->io_offset > z2->io_offset)
+		return (1);
+
+	if (z1 < z2)
+		return (-1);
+	if (z1 > z2)
+		return (1);
+
+	return (0);
+}
+
+void
+vdev_queue_init(vdev_t *vd)
+{
+	vdev_queue_t *vq = &vd->vdev_queue;
+
+	mutex_init(&vq->vq_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	avl_create(&vq->vq_deadline_tree, vdev_queue_deadline_compare,
+	    sizeof (zio_t), offsetof(struct zio, io_deadline_node));
+
+	avl_create(&vq->vq_read_tree, vdev_queue_offset_compare,
+	    sizeof (zio_t), offsetof(struct zio, io_offset_node));
+
+	avl_create(&vq->vq_write_tree, vdev_queue_offset_compare,
+	    sizeof (zio_t), offsetof(struct zio, io_offset_node));
+
+	avl_create(&vq->vq_pending_tree, vdev_queue_offset_compare,
+	    sizeof (zio_t), offsetof(struct zio, io_offset_node));
+}
+
+void
+vdev_queue_fini(vdev_t *vd)
+{
+	vdev_queue_t *vq = &vd->vdev_queue;
+
+	avl_destroy(&vq->vq_deadline_tree);
+	avl_destroy(&vq->vq_read_tree);
+	avl_destroy(&vq->vq_write_tree);
+	avl_destroy(&vq->vq_pending_tree);
+
+	mutex_destroy(&vq->vq_lock);
+}
+
+static void
+vdev_queue_io_add(vdev_queue_t *vq, zio_t *zio)
+{
+	avl_add(&vq->vq_deadline_tree, zio);
+	avl_add(zio->io_vdev_tree, zio);
+}
+
+static void
+vdev_queue_io_remove(vdev_queue_t *vq, zio_t *zio)
+{
+	avl_remove(&vq->vq_deadline_tree, zio);
+	avl_remove(zio->io_vdev_tree, zio);
+}
+
+static void
+vdev_queue_agg_io_done(zio_t *aio)
+{
+	zio_t *pio;
+
+	while ((pio = zio_walk_parents(aio)) != NULL)
+		if (aio->io_type == ZIO_TYPE_READ)
+			bcopy((char *)aio->io_data + (pio->io_offset -
+			    aio->io_offset), pio->io_data, pio->io_size);
+
+	zio_buf_free(aio->io_data, aio->io_size);
+}
+
+/*
+ * Compute the range spanned by two i/os, which is the endpoint of the last
+ * (lio->io_offset + lio->io_size) minus start of the first (fio->io_offset).
+ * Conveniently, the gap between fio and lio is given by -IO_SPAN(lio, fio);
+ * thus fio and lio are adjacent if and only if IO_SPAN(lio, fio) == 0.
+ */
+#define	IO_SPAN(fio, lio) ((lio)->io_offset + (lio)->io_size - (fio)->io_offset)
+#define	IO_GAP(fio, lio) (-IO_SPAN(lio, fio))
+
+static zio_t *
+vdev_queue_io_to_issue(vdev_queue_t *vq, uint64_t pending_limit)
+{
+	zio_t *fio, *lio, *aio, *dio, *nio, *mio;
+	avl_tree_t *t;
+	int flags;
+	uint64_t maxspan = zfs_vdev_aggregation_limit;
+	uint64_t maxgap;
+	int stretch;
+
+again:
+	ASSERT(MUTEX_HELD(&vq->vq_lock));
+
+	if (avl_numnodes(&vq->vq_pending_tree) >= pending_limit ||
+	    avl_numnodes(&vq->vq_deadline_tree) == 0)
+		return (NULL);
+
+	fio = lio = avl_first(&vq->vq_deadline_tree);
+
+	t = fio->io_vdev_tree;
+	flags = fio->io_flags & ZIO_FLAG_AGG_INHERIT;
+	maxgap = (t == &vq->vq_read_tree) ? zfs_vdev_read_gap_limit : 0;
+
+	if (!(flags & ZIO_FLAG_DONT_AGGREGATE)) {
+		/*
+		 * We can aggregate I/Os that are sufficiently adjacent and of
+		 * the same flavor, as expressed by the AGG_INHERIT flags.
+		 * The latter requirement is necessary so that certain
+		 * attributes of the I/O, such as whether it's a normal I/O
+		 * or a scrub/resilver, can be preserved in the aggregate.
+		 * We can include optional I/Os, but don't allow them
+		 * to begin a range as they add no benefit in that situation.
+		 */
+
+		/*
+		 * We keep track of the last non-optional I/O.
+		 */
+		mio = (fio->io_flags & ZIO_FLAG_OPTIONAL) ? NULL : fio;
+
+		/*
+		 * Walk backwards through sufficiently contiguous I/Os
+		 * recording the last non-option I/O.
+		 */
+		while ((dio = AVL_PREV(t, fio)) != NULL &&
+		    (dio->io_flags & ZIO_FLAG_AGG_INHERIT) == flags &&
+		    IO_SPAN(dio, lio) <= maxspan &&
+		    IO_GAP(dio, fio) <= maxgap) {
+			fio = dio;
+			if (mio == NULL && !(fio->io_flags & ZIO_FLAG_OPTIONAL))
+				mio = fio;
+		}
+
+		/*
+		 * Skip any initial optional I/Os.
+		 */
+		while ((fio->io_flags & ZIO_FLAG_OPTIONAL) && fio != lio) {
+			fio = AVL_NEXT(t, fio);
+			ASSERT(fio != NULL);
+		}
+
+		/*
+		 * Walk forward through sufficiently contiguous I/Os.
+		 */
+		while ((dio = AVL_NEXT(t, lio)) != NULL &&
+		    (dio->io_flags & ZIO_FLAG_AGG_INHERIT) == flags &&
+		    IO_SPAN(fio, dio) <= maxspan &&
+		    IO_GAP(lio, dio) <= maxgap) {
+			lio = dio;
+			if (!(lio->io_flags & ZIO_FLAG_OPTIONAL))
+				mio = lio;
+		}
+
+		/*
+		 * Now that we've established the range of the I/O aggregation
+		 * we must decide what to do with trailing optional I/Os.
+		 * For reads, there's nothing to do. While we are unable to
+		 * aggregate further, it's possible that a trailing optional
+		 * I/O would allow the underlying device to aggregate with
+		 * subsequent I/Os. We must therefore determine if the next
+		 * non-optional I/O is close enough to make aggregation
+		 * worthwhile.
+		 */
+		stretch = B_FALSE;
+		if (t != &vq->vq_read_tree && mio != NULL) {
+			nio = lio;
+			while ((dio = AVL_NEXT(t, nio)) != NULL &&
+			    IO_GAP(nio, dio) == 0 &&
+			    IO_GAP(mio, dio) <= zfs_vdev_write_gap_limit) {
+				nio = dio;
+				if (!(nio->io_flags & ZIO_FLAG_OPTIONAL)) {
+					stretch = B_TRUE;
+					break;
+				}
+			}
+		}
+
+		if (stretch) {
+			/* This may be a no-op. */
+			VERIFY((dio = AVL_NEXT(t, lio)) != NULL);
+			dio->io_flags &= ~ZIO_FLAG_OPTIONAL;
+		} else {
+			while (lio != mio && lio != fio) {
+				ASSERT(lio->io_flags & ZIO_FLAG_OPTIONAL);
+				lio = AVL_PREV(t, lio);
+				ASSERT(lio != NULL);
+			}
+		}
+	}
+
+	if (fio != lio) {
+		uint64_t size = IO_SPAN(fio, lio);
+		ASSERT(size <= zfs_vdev_aggregation_limit);
+
+		aio = zio_vdev_delegated_io(fio->io_vd, fio->io_offset,
+		    zio_buf_alloc(size), size, fio->io_type, ZIO_PRIORITY_AGG,
+		    flags | ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE,
+		    vdev_queue_agg_io_done, NULL);
+
+		nio = fio;
+		do {
+			dio = nio;
+			nio = AVL_NEXT(t, dio);
+			ASSERT(dio->io_type == aio->io_type);
+			ASSERT(dio->io_vdev_tree == t);
+
+			if (dio->io_flags & ZIO_FLAG_NODATA) {
+				ASSERT(dio->io_type == ZIO_TYPE_WRITE);
+				bzero((char *)aio->io_data + (dio->io_offset -
+				    aio->io_offset), dio->io_size);
+			} else if (dio->io_type == ZIO_TYPE_WRITE) {
+				bcopy(dio->io_data, (char *)aio->io_data +
+				    (dio->io_offset - aio->io_offset),
+				    dio->io_size);
+			}
+
+			zio_add_child(dio, aio);
+			vdev_queue_io_remove(vq, dio);
+			zio_vdev_io_bypass(dio);
+			zio_execute(dio);
+		} while (dio != lio);
+
+		avl_add(&vq->vq_pending_tree, aio);
+
+		return (aio);
+	}
+
+	ASSERT(fio->io_vdev_tree == t);
+	vdev_queue_io_remove(vq, fio);
+
+	/*
+	 * If the I/O is or was optional and therefore has no data, we need to
+	 * simply discard it. We need to drop the vdev queue's lock to avoid a
+	 * deadlock that we could encounter since this I/O will complete
+	 * immediately.
+	 */
+	if (fio->io_flags & ZIO_FLAG_NODATA) {
+		mutex_exit(&vq->vq_lock);
+		zio_vdev_io_bypass(fio);
+		zio_execute(fio);
+		mutex_enter(&vq->vq_lock);
+		goto again;
+	}
+
+	avl_add(&vq->vq_pending_tree, fio);
+
+	return (fio);
+}
+
+zio_t *
+vdev_queue_io(zio_t *zio)
+{
+	vdev_queue_t *vq = &zio->io_vd->vdev_queue;
+	zio_t *nio;
+
+	ASSERT(zio->io_type == ZIO_TYPE_READ || zio->io_type == ZIO_TYPE_WRITE);
+
+	if (zio->io_flags & ZIO_FLAG_DONT_QUEUE)
+		return (zio);
+
+	zio->io_flags |= ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE;
+
+	if (zio->io_type == ZIO_TYPE_READ)
+		zio->io_vdev_tree = &vq->vq_read_tree;
+	else
+		zio->io_vdev_tree = &vq->vq_write_tree;
+
+	mutex_enter(&vq->vq_lock);
+
+	zio->io_deadline = (ddi_get_lbolt64() >> zfs_vdev_time_shift) +
+	    zio->io_priority;
+
+	vdev_queue_io_add(vq, zio);
+
+	nio = vdev_queue_io_to_issue(vq, zfs_vdev_min_pending);
+
+	mutex_exit(&vq->vq_lock);
+
+	if (nio == NULL)
+		return (NULL);
+
+	if (nio->io_done == vdev_queue_agg_io_done) {
+		zio_nowait(nio);
+		return (NULL);
+	}
+
+	return (nio);
+}
+
+void
+vdev_queue_io_done(zio_t *zio)
+{
+	vdev_queue_t *vq = &zio->io_vd->vdev_queue;
+
+	mutex_enter(&vq->vq_lock);
+
+	avl_remove(&vq->vq_pending_tree, zio);
+
+	for (int i = 0; i < zfs_vdev_ramp_rate; i++) {
+		zio_t *nio = vdev_queue_io_to_issue(vq, zfs_vdev_max_pending);
+		if (nio == NULL)
+			break;
+		mutex_exit(&vq->vq_lock);
+		if (nio->io_done == vdev_queue_agg_io_done) {
+			zio_nowait(nio);
+		} else {
+			zio_vdev_io_reissue(nio);
+			zio_execute(nio);
+		}
+		mutex_enter(&vq->vq_lock);
+	}
+
+	mutex_exit(&vq->vq_lock);
+}
diff --git a/uts/common/fs/zfs/vdev_raidz.c b/uts/common/fs/zfs/vdev_raidz.c
new file mode 100644
index 000000000000..4b0f5602c1d4
--- /dev/null
+++ b/uts/common/fs/zfs/vdev_raidz.c
@@ -0,0 +1,2146 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/vdev_impl.h>
+#include <sys/zio.h>
+#include <sys/zio_checksum.h>
+#include <sys/fs/zfs.h>
+#include <sys/fm/fs/zfs.h>
+
+/*
+ * Virtual device vector for RAID-Z.
+ *
+ * This vdev supports single, double, and triple parity. For single parity,
+ * we use a simple XOR of all the data columns. For double or triple parity,
+ * we use a special case of Reed-Solomon coding. This extends the
+ * technique described in "The mathematics of RAID-6" by H. Peter Anvin by
+ * drawing on the system described in "A Tutorial on Reed-Solomon Coding for
+ * Fault-Tolerance in RAID-like Systems" by James S. Plank on which the
+ * former is also based. The latter is designed to provide higher performance
+ * for writes.
+ *
+ * Note that the Plank paper claimed to support arbitrary N+M, but was then
+ * amended six years later identifying a critical flaw that invalidates its
+ * claims. Nevertheless, the technique can be adapted to work for up to
+ * triple parity. For additional parity, the amendment "Note: Correction to
+ * the 1997 Tutorial on Reed-Solomon Coding" by James S. Plank and Ying Ding
+ * is viable, but the additional complexity means that write performance will
+ * suffer.
+ *
+ * All of the methods above operate on a Galois field, defined over the
+ * integers mod 2^N. In our case we choose N=8 for GF(8) so that all elements
+ * can be expressed with a single byte. Briefly, the operations on the
+ * field are defined as follows:
+ *
+ *   o addition (+) is represented by a bitwise XOR
+ *   o subtraction (-) is therefore identical to addition: A + B = A - B
+ *   o multiplication of A by 2 is defined by the following bitwise expression:
+ *	(A * 2)_7 = A_6
+ *	(A * 2)_6 = A_5
+ *	(A * 2)_5 = A_4
+ *	(A * 2)_4 = A_3 + A_7
+ *	(A * 2)_3 = A_2 + A_7
+ *	(A * 2)_2 = A_1 + A_7
+ *	(A * 2)_1 = A_0
+ *	(A * 2)_0 = A_7
+ *
+ * In C, multiplying by 2 is therefore ((a << 1) ^ ((a & 0x80) ? 0x1d : 0)).
+ * As an aside, this multiplication is derived from the error correcting
+ * primitive polynomial x^8 + x^4 + x^3 + x^2 + 1.
+ *
+ * Observe that any number in the field (except for 0) can be expressed as a
+ * power of 2 -- a generator for the field. We store a table of the powers of
+ * 2 and logs base 2 for quick look ups, and exploit the fact that A * B can
+ * be rewritten as 2^(log_2(A) + log_2(B)) (where '+' is normal addition rather
+ * than field addition). The inverse of a field element A (A^-1) is therefore
+ * A ^ (255 - 1) = A^254.
+ *
+ * The up-to-three parity columns, P, Q, R over several data columns,
+ * D_0, ... D_n-1, can be expressed by field operations:
+ *
+ *	P = D_0 + D_1 + ... + D_n-2 + D_n-1
+ *	Q = 2^n-1 * D_0 + 2^n-2 * D_1 + ... + 2^1 * D_n-2 + 2^0 * D_n-1
+ *	  = ((...((D_0) * 2 + D_1) * 2 + ...) * 2 + D_n-2) * 2 + D_n-1
+ *	R = 4^n-1 * D_0 + 4^n-2 * D_1 + ... + 4^1 * D_n-2 + 4^0 * D_n-1
+ *	  = ((...((D_0) * 4 + D_1) * 4 + ...) * 4 + D_n-2) * 4 + D_n-1
+ *
+ * We chose 1, 2, and 4 as our generators because 1 corresponds to the trival
+ * XOR operation, and 2 and 4 can be computed quickly and generate linearly-
+ * independent coefficients. (There are no additional coefficients that have
+ * this property which is why the uncorrected Plank method breaks down.)
+ *
+ * See the reconstruction code below for how P, Q and R can used individually
+ * or in concert to recover missing data columns.
+ */
+
+typedef struct raidz_col {
+	uint64_t rc_devidx;		/* child device index for I/O */
+	uint64_t rc_offset;		/* device offset */
+	uint64_t rc_size;		/* I/O size */
+	void *rc_data;			/* I/O data */
+	void *rc_gdata;			/* used to store the "good" version */
+	int rc_error;			/* I/O error for this device */
+	uint8_t rc_tried;		/* Did we attempt this I/O column? */
+	uint8_t rc_skipped;		/* Did we skip this I/O column? */
+} raidz_col_t;
+
+typedef struct raidz_map {
+	uint64_t rm_cols;		/* Regular column count */
+	uint64_t rm_scols;		/* Count including skipped columns */
+	uint64_t rm_bigcols;		/* Number of oversized columns */
+	uint64_t rm_asize;		/* Actual total I/O size */
+	uint64_t rm_missingdata;	/* Count of missing data devices */
+	uint64_t rm_missingparity;	/* Count of missing parity devices */
+	uint64_t rm_firstdatacol;	/* First data column/parity count */
+	uint64_t rm_nskip;		/* Skipped sectors for padding */
+	uint64_t rm_skipstart;	/* Column index of padding start */
+	void *rm_datacopy;		/* rm_asize-buffer of copied data */
+	uintptr_t rm_reports;		/* # of referencing checksum reports */
+	uint8_t	rm_freed;		/* map no longer has referencing ZIO */
+	uint8_t	rm_ecksuminjected;	/* checksum error was injected */
+	raidz_col_t rm_col[1];		/* Flexible array of I/O columns */
+} raidz_map_t;
+
+#define	VDEV_RAIDZ_P		0
+#define	VDEV_RAIDZ_Q		1
+#define	VDEV_RAIDZ_R		2
+
+#define	VDEV_RAIDZ_MUL_2(x)	(((x) << 1) ^ (((x) & 0x80) ? 0x1d : 0))
+#define	VDEV_RAIDZ_MUL_4(x)	(VDEV_RAIDZ_MUL_2(VDEV_RAIDZ_MUL_2(x)))
+
+/*
+ * We provide a mechanism to perform the field multiplication operation on a
+ * 64-bit value all at once rather than a byte at a time. This works by
+ * creating a mask from the top bit in each byte and using that to
+ * conditionally apply the XOR of 0x1d.
+ */
+#define	VDEV_RAIDZ_64MUL_2(x, mask) \
+{ \
+	(mask) = (x) & 0x8080808080808080ULL; \
+	(mask) = ((mask) << 1) - ((mask) >> 7); \
+	(x) = (((x) << 1) & 0xfefefefefefefefeULL) ^ \
+	    ((mask) & 0x1d1d1d1d1d1d1d1d); \
+}
+
+#define	VDEV_RAIDZ_64MUL_4(x, mask) \
+{ \
+	VDEV_RAIDZ_64MUL_2((x), mask); \
+	VDEV_RAIDZ_64MUL_2((x), mask); \
+}
+
+/*
+ * Force reconstruction to use the general purpose method.
+ */
+int vdev_raidz_default_to_general;
+
+/*
+ * These two tables represent powers and logs of 2 in the Galois field defined
+ * above. These values were computed by repeatedly multiplying by 2 as above.
+ */
+static const uint8_t vdev_raidz_pow2[256] = {
+	0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80,
+	0x1d, 0x3a, 0x74, 0xe8, 0xcd, 0x87, 0x13, 0x26,
+	0x4c, 0x98, 0x2d, 0x5a, 0xb4, 0x75, 0xea, 0xc9,
+	0x8f, 0x03, 0x06, 0x0c, 0x18, 0x30, 0x60, 0xc0,
+	0x9d, 0x27, 0x4e, 0x9c, 0x25, 0x4a, 0x94, 0x35,
+	0x6a, 0xd4, 0xb5, 0x77, 0xee, 0xc1, 0x9f, 0x23,
+	0x46, 0x8c, 0x05, 0x0a, 0x14, 0x28, 0x50, 0xa0,
+	0x5d, 0xba, 0x69, 0xd2, 0xb9, 0x6f, 0xde, 0xa1,
+	0x5f, 0xbe, 0x61, 0xc2, 0x99, 0x2f, 0x5e, 0xbc,
+	0x65, 0xca, 0x89, 0x0f, 0x1e, 0x3c, 0x78, 0xf0,
+	0xfd, 0xe7, 0xd3, 0xbb, 0x6b, 0xd6, 0xb1, 0x7f,
+	0xfe, 0xe1, 0xdf, 0xa3, 0x5b, 0xb6, 0x71, 0xe2,
+	0xd9, 0xaf, 0x43, 0x86, 0x11, 0x22, 0x44, 0x88,
+	0x0d, 0x1a, 0x34, 0x68, 0xd0, 0xbd, 0x67, 0xce,
+	0x81, 0x1f, 0x3e, 0x7c, 0xf8, 0xed, 0xc7, 0x93,
+	0x3b, 0x76, 0xec, 0xc5, 0x97, 0x33, 0x66, 0xcc,
+	0x85, 0x17, 0x2e, 0x5c, 0xb8, 0x6d, 0xda, 0xa9,
+	0x4f, 0x9e, 0x21, 0x42, 0x84, 0x15, 0x2a, 0x54,
+	0xa8, 0x4d, 0x9a, 0x29, 0x52, 0xa4, 0x55, 0xaa,
+	0x49, 0x92, 0x39, 0x72, 0xe4, 0xd5, 0xb7, 0x73,
+	0xe6, 0xd1, 0xbf, 0x63, 0xc6, 0x91, 0x3f, 0x7e,
+	0xfc, 0xe5, 0xd7, 0xb3, 0x7b, 0xf6, 0xf1, 0xff,
+	0xe3, 0xdb, 0xab, 0x4b, 0x96, 0x31, 0x62, 0xc4,
+	0x95, 0x37, 0x6e, 0xdc, 0xa5, 0x57, 0xae, 0x41,
+	0x82, 0x19, 0x32, 0x64, 0xc8, 0x8d, 0x07, 0x0e,
+	0x1c, 0x38, 0x70, 0xe0, 0xdd, 0xa7, 0x53, 0xa6,
+	0x51, 0xa2, 0x59, 0xb2, 0x79, 0xf2, 0xf9, 0xef,
+	0xc3, 0x9b, 0x2b, 0x56, 0xac, 0x45, 0x8a, 0x09,
+	0x12, 0x24, 0x48, 0x90, 0x3d, 0x7a, 0xf4, 0xf5,
+	0xf7, 0xf3, 0xfb, 0xeb, 0xcb, 0x8b, 0x0b, 0x16,
+	0x2c, 0x58, 0xb0, 0x7d, 0xfa, 0xe9, 0xcf, 0x83,
+	0x1b, 0x36, 0x6c, 0xd8, 0xad, 0x47, 0x8e, 0x01
+};
+static const uint8_t vdev_raidz_log2[256] = {
+	0x00, 0x00, 0x01, 0x19, 0x02, 0x32, 0x1a, 0xc6,
+	0x03, 0xdf, 0x33, 0xee, 0x1b, 0x68, 0xc7, 0x4b,
+	0x04, 0x64, 0xe0, 0x0e, 0x34, 0x8d, 0xef, 0x81,
+	0x1c, 0xc1, 0x69, 0xf8, 0xc8, 0x08, 0x4c, 0x71,
+	0x05, 0x8a, 0x65, 0x2f, 0xe1, 0x24, 0x0f, 0x21,
+	0x35, 0x93, 0x8e, 0xda, 0xf0, 0x12, 0x82, 0x45,
+	0x1d, 0xb5, 0xc2, 0x7d, 0x6a, 0x27, 0xf9, 0xb9,
+	0xc9, 0x9a, 0x09, 0x78, 0x4d, 0xe4, 0x72, 0xa6,
+	0x06, 0xbf, 0x8b, 0x62, 0x66, 0xdd, 0x30, 0xfd,
+	0xe2, 0x98, 0x25, 0xb3, 0x10, 0x91, 0x22, 0x88,
+	0x36, 0xd0, 0x94, 0xce, 0x8f, 0x96, 0xdb, 0xbd,
+	0xf1, 0xd2, 0x13, 0x5c, 0x83, 0x38, 0x46, 0x40,
+	0x1e, 0x42, 0xb6, 0xa3, 0xc3, 0x48, 0x7e, 0x6e,
+	0x6b, 0x3a, 0x28, 0x54, 0xfa, 0x85, 0xba, 0x3d,
+	0xca, 0x5e, 0x9b, 0x9f, 0x0a, 0x15, 0x79, 0x2b,
+	0x4e, 0xd4, 0xe5, 0xac, 0x73, 0xf3, 0xa7, 0x57,
+	0x07, 0x70, 0xc0, 0xf7, 0x8c, 0x80, 0x63, 0x0d,
+	0x67, 0x4a, 0xde, 0xed, 0x31, 0xc5, 0xfe, 0x18,
+	0xe3, 0xa5, 0x99, 0x77, 0x26, 0xb8, 0xb4, 0x7c,
+	0x11, 0x44, 0x92, 0xd9, 0x23, 0x20, 0x89, 0x2e,
+	0x37, 0x3f, 0xd1, 0x5b, 0x95, 0xbc, 0xcf, 0xcd,
+	0x90, 0x87, 0x97, 0xb2, 0xdc, 0xfc, 0xbe, 0x61,
+	0xf2, 0x56, 0xd3, 0xab, 0x14, 0x2a, 0x5d, 0x9e,
+	0x84, 0x3c, 0x39, 0x53, 0x47, 0x6d, 0x41, 0xa2,
+	0x1f, 0x2d, 0x43, 0xd8, 0xb7, 0x7b, 0xa4, 0x76,
+	0xc4, 0x17, 0x49, 0xec, 0x7f, 0x0c, 0x6f, 0xf6,
+	0x6c, 0xa1, 0x3b, 0x52, 0x29, 0x9d, 0x55, 0xaa,
+	0xfb, 0x60, 0x86, 0xb1, 0xbb, 0xcc, 0x3e, 0x5a,
+	0xcb, 0x59, 0x5f, 0xb0, 0x9c, 0xa9, 0xa0, 0x51,
+	0x0b, 0xf5, 0x16, 0xeb, 0x7a, 0x75, 0x2c, 0xd7,
+	0x4f, 0xae, 0xd5, 0xe9, 0xe6, 0xe7, 0xad, 0xe8,
+	0x74, 0xd6, 0xf4, 0xea, 0xa8, 0x50, 0x58, 0xaf,
+};
+
+static void vdev_raidz_generate_parity(raidz_map_t *rm);
+
+/*
+ * Multiply a given number by 2 raised to the given power.
+ */
+static uint8_t
+vdev_raidz_exp2(uint_t a, int exp)
+{
+	if (a == 0)
+		return (0);
+
+	ASSERT(exp >= 0);
+	ASSERT(vdev_raidz_log2[a] > 0 || a == 1);
+
+	exp += vdev_raidz_log2[a];
+	if (exp > 255)
+		exp -= 255;
+
+	return (vdev_raidz_pow2[exp]);
+}
+
+static void
+vdev_raidz_map_free(raidz_map_t *rm)
+{
+	int c;
+	size_t size;
+
+	for (c = 0; c < rm->rm_firstdatacol; c++) {
+		zio_buf_free(rm->rm_col[c].rc_data, rm->rm_col[c].rc_size);
+
+		if (rm->rm_col[c].rc_gdata != NULL)
+			zio_buf_free(rm->rm_col[c].rc_gdata,
+			    rm->rm_col[c].rc_size);
+	}
+
+	size = 0;
+	for (c = rm->rm_firstdatacol; c < rm->rm_cols; c++)
+		size += rm->rm_col[c].rc_size;
+
+	if (rm->rm_datacopy != NULL)
+		zio_buf_free(rm->rm_datacopy, size);
+
+	kmem_free(rm, offsetof(raidz_map_t, rm_col[rm->rm_scols]));
+}
+
+static void
+vdev_raidz_map_free_vsd(zio_t *zio)
+{
+	raidz_map_t *rm = zio->io_vsd;
+
+	ASSERT3U(rm->rm_freed, ==, 0);
+	rm->rm_freed = 1;
+
+	if (rm->rm_reports == 0)
+		vdev_raidz_map_free(rm);
+}
+
+/*ARGSUSED*/
+static void
+vdev_raidz_cksum_free(void *arg, size_t ignored)
+{
+	raidz_map_t *rm = arg;
+
+	ASSERT3U(rm->rm_reports, >, 0);
+
+	if (--rm->rm_reports == 0 && rm->rm_freed != 0)
+		vdev_raidz_map_free(rm);
+}
+
+static void
+vdev_raidz_cksum_finish(zio_cksum_report_t *zcr, const void *good_data)
+{
+	raidz_map_t *rm = zcr->zcr_cbdata;
+	size_t c = zcr->zcr_cbinfo;
+	size_t x;
+
+	const char *good = NULL;
+	const char *bad = rm->rm_col[c].rc_data;
+
+	if (good_data == NULL) {
+		zfs_ereport_finish_checksum(zcr, NULL, NULL, B_FALSE);
+		return;
+	}
+
+	if (c < rm->rm_firstdatacol) {
+		/*
+		 * The first time through, calculate the parity blocks for
+		 * the good data (this relies on the fact that the good
+		 * data never changes for a given logical ZIO)
+		 */
+		if (rm->rm_col[0].rc_gdata == NULL) {
+			char *bad_parity[VDEV_RAIDZ_MAXPARITY];
+			char *buf;
+
+			/*
+			 * Set up the rm_col[]s to generate the parity for
+			 * good_data, first saving the parity bufs and
+			 * replacing them with buffers to hold the result.
+			 */
+			for (x = 0; x < rm->rm_firstdatacol; x++) {
+				bad_parity[x] = rm->rm_col[x].rc_data;
+				rm->rm_col[x].rc_data = rm->rm_col[x].rc_gdata =
+				    zio_buf_alloc(rm->rm_col[x].rc_size);
+			}
+
+			/* fill in the data columns from good_data */
+			buf = (char *)good_data;
+			for (; x < rm->rm_cols; x++) {
+				rm->rm_col[x].rc_data = buf;
+				buf += rm->rm_col[x].rc_size;
+			}
+
+			/*
+			 * Construct the parity from the good data.
+			 */
+			vdev_raidz_generate_parity(rm);
+
+			/* restore everything back to its original state */
+			for (x = 0; x < rm->rm_firstdatacol; x++)
+				rm->rm_col[x].rc_data = bad_parity[x];
+
+			buf = rm->rm_datacopy;
+			for (x = rm->rm_firstdatacol; x < rm->rm_cols; x++) {
+				rm->rm_col[x].rc_data = buf;
+				buf += rm->rm_col[x].rc_size;
+			}
+		}
+
+		ASSERT3P(rm->rm_col[c].rc_gdata, !=, NULL);
+		good = rm->rm_col[c].rc_gdata;
+	} else {
+		/* adjust good_data to point at the start of our column */
+		good = good_data;
+
+		for (x = rm->rm_firstdatacol; x < c; x++)
+			good += rm->rm_col[x].rc_size;
+	}
+
+	/* we drop the ereport if it ends up that the data was good */
+	zfs_ereport_finish_checksum(zcr, good, bad, B_TRUE);
+}
+
+/*
+ * Invoked indirectly by zfs_ereport_start_checksum(), called
+ * below when our read operation fails completely.  The main point
+ * is to keep a copy of everything we read from disk, so that at
+ * vdev_raidz_cksum_finish() time we can compare it with the good data.
+ */
+static void
+vdev_raidz_cksum_report(zio_t *zio, zio_cksum_report_t *zcr, void *arg)
+{
+	size_t c = (size_t)(uintptr_t)arg;
+	caddr_t buf;
+
+	raidz_map_t *rm = zio->io_vsd;
+	size_t size;
+
+	/* set up the report and bump the refcount  */
+	zcr->zcr_cbdata = rm;
+	zcr->zcr_cbinfo = c;
+	zcr->zcr_finish = vdev_raidz_cksum_finish;
+	zcr->zcr_free = vdev_raidz_cksum_free;
+
+	rm->rm_reports++;
+	ASSERT3U(rm->rm_reports, >, 0);
+
+	if (rm->rm_datacopy != NULL)
+		return;
+
+	/*
+	 * It's the first time we're called for this raidz_map_t, so we need
+	 * to copy the data aside; there's no guarantee that our zio's buffer
+	 * won't be re-used for something else.
+	 *
+	 * Our parity data is already in separate buffers, so there's no need
+	 * to copy them.
+	 */
+
+	size = 0;
+	for (c = rm->rm_firstdatacol; c < rm->rm_cols; c++)
+		size += rm->rm_col[c].rc_size;
+
+	buf = rm->rm_datacopy = zio_buf_alloc(size);
+
+	for (c = rm->rm_firstdatacol; c < rm->rm_cols; c++) {
+		raidz_col_t *col = &rm->rm_col[c];
+
+		bcopy(col->rc_data, buf, col->rc_size);
+		col->rc_data = buf;
+
+		buf += col->rc_size;
+	}
+	ASSERT3P(buf - (caddr_t)rm->rm_datacopy, ==, size);
+}
+
+static const zio_vsd_ops_t vdev_raidz_vsd_ops = {
+	vdev_raidz_map_free_vsd,
+	vdev_raidz_cksum_report
+};
+
+static raidz_map_t *
+vdev_raidz_map_alloc(zio_t *zio, uint64_t unit_shift, uint64_t dcols,
+    uint64_t nparity)
+{
+	raidz_map_t *rm;
+	uint64_t b = zio->io_offset >> unit_shift;
+	uint64_t s = zio->io_size >> unit_shift;
+	uint64_t f = b % dcols;
+	uint64_t o = (b / dcols) << unit_shift;
+	uint64_t q, r, c, bc, col, acols, scols, coff, devidx, asize, tot;
+
+	q = s / (dcols - nparity);
+	r = s - q * (dcols - nparity);
+	bc = (r == 0 ? 0 : r + nparity);
+	tot = s + nparity * (q + (r == 0 ? 0 : 1));
+
+	if (q == 0) {
+		acols = bc;
+		scols = MIN(dcols, roundup(bc, nparity + 1));
+	} else {
+		acols = dcols;
+		scols = dcols;
+	}
+
+	ASSERT3U(acols, <=, scols);
+
+	rm = kmem_alloc(offsetof(raidz_map_t, rm_col[scols]), KM_SLEEP);
+
+	rm->rm_cols = acols;
+	rm->rm_scols = scols;
+	rm->rm_bigcols = bc;
+	rm->rm_skipstart = bc;
+	rm->rm_missingdata = 0;
+	rm->rm_missingparity = 0;
+	rm->rm_firstdatacol = nparity;
+	rm->rm_datacopy = NULL;
+	rm->rm_reports = 0;
+	rm->rm_freed = 0;
+	rm->rm_ecksuminjected = 0;
+
+	asize = 0;
+
+	for (c = 0; c < scols; c++) {
+		col = f + c;
+		coff = o;
+		if (col >= dcols) {
+			col -= dcols;
+			coff += 1ULL << unit_shift;
+		}
+		rm->rm_col[c].rc_devidx = col;
+		rm->rm_col[c].rc_offset = coff;
+		rm->rm_col[c].rc_data = NULL;
+		rm->rm_col[c].rc_gdata = NULL;
+		rm->rm_col[c].rc_error = 0;
+		rm->rm_col[c].rc_tried = 0;
+		rm->rm_col[c].rc_skipped = 0;
+
+		if (c >= acols)
+			rm->rm_col[c].rc_size = 0;
+		else if (c < bc)
+			rm->rm_col[c].rc_size = (q + 1) << unit_shift;
+		else
+			rm->rm_col[c].rc_size = q << unit_shift;
+
+		asize += rm->rm_col[c].rc_size;
+	}
+
+	ASSERT3U(asize, ==, tot << unit_shift);
+	rm->rm_asize = roundup(asize, (nparity + 1) << unit_shift);
+	rm->rm_nskip = roundup(tot, nparity + 1) - tot;
+	ASSERT3U(rm->rm_asize - asize, ==, rm->rm_nskip << unit_shift);
+	ASSERT3U(rm->rm_nskip, <=, nparity);
+
+	for (c = 0; c < rm->rm_firstdatacol; c++)
+		rm->rm_col[c].rc_data = zio_buf_alloc(rm->rm_col[c].rc_size);
+
+	rm->rm_col[c].rc_data = zio->io_data;
+
+	for (c = c + 1; c < acols; c++)
+		rm->rm_col[c].rc_data = (char *)rm->rm_col[c - 1].rc_data +
+		    rm->rm_col[c - 1].rc_size;
+
+	/*
+	 * If all data stored spans all columns, there's a danger that parity
+	 * will always be on the same device and, since parity isn't read
+	 * during normal operation, that that device's I/O bandwidth won't be
+	 * used effectively. We therefore switch the parity every 1MB.
+	 *
+	 * ... at least that was, ostensibly, the theory. As a practical
+	 * matter unless we juggle the parity between all devices evenly, we
+	 * won't see any benefit. Further, occasional writes that aren't a
+	 * multiple of the LCM of the number of children and the minimum
+	 * stripe width are sufficient to avoid pessimal behavior.
+	 * Unfortunately, this decision created an implicit on-disk format
+	 * requirement that we need to support for all eternity, but only
+	 * for single-parity RAID-Z.
+	 *
+	 * If we intend to skip a sector in the zeroth column for padding
+	 * we must make sure to note this swap. We will never intend to
+	 * skip the first column since at least one data and one parity
+	 * column must appear in each row.
+	 */
+	ASSERT(rm->rm_cols >= 2);
+	ASSERT(rm->rm_col[0].rc_size == rm->rm_col[1].rc_size);
+
+	if (rm->rm_firstdatacol == 1 && (zio->io_offset & (1ULL << 20))) {
+		devidx = rm->rm_col[0].rc_devidx;
+		o = rm->rm_col[0].rc_offset;
+		rm->rm_col[0].rc_devidx = rm->rm_col[1].rc_devidx;
+		rm->rm_col[0].rc_offset = rm->rm_col[1].rc_offset;
+		rm->rm_col[1].rc_devidx = devidx;
+		rm->rm_col[1].rc_offset = o;
+
+		if (rm->rm_skipstart == 0)
+			rm->rm_skipstart = 1;
+	}
+
+	zio->io_vsd = rm;
+	zio->io_vsd_ops = &vdev_raidz_vsd_ops;
+	return (rm);
+}
+
+static void
+vdev_raidz_generate_parity_p(raidz_map_t *rm)
+{
+	uint64_t *p, *src, pcount, ccount, i;
+	int c;
+
+	pcount = rm->rm_col[VDEV_RAIDZ_P].rc_size / sizeof (src[0]);
+
+	for (c = rm->rm_firstdatacol; c < rm->rm_cols; c++) {
+		src = rm->rm_col[c].rc_data;
+		p = rm->rm_col[VDEV_RAIDZ_P].rc_data;
+		ccount = rm->rm_col[c].rc_size / sizeof (src[0]);
+
+		if (c == rm->rm_firstdatacol) {
+			ASSERT(ccount == pcount);
+			for (i = 0; i < ccount; i++, src++, p++) {
+				*p = *src;
+			}
+		} else {
+			ASSERT(ccount <= pcount);
+			for (i = 0; i < ccount; i++, src++, p++) {
+				*p ^= *src;
+			}
+		}
+	}
+}
+
+static void
+vdev_raidz_generate_parity_pq(raidz_map_t *rm)
+{
+	uint64_t *p, *q, *src, pcnt, ccnt, mask, i;
+	int c;
+
+	pcnt = rm->rm_col[VDEV_RAIDZ_P].rc_size / sizeof (src[0]);
+	ASSERT(rm->rm_col[VDEV_RAIDZ_P].rc_size ==
+	    rm->rm_col[VDEV_RAIDZ_Q].rc_size);
+
+	for (c = rm->rm_firstdatacol; c < rm->rm_cols; c++) {
+		src = rm->rm_col[c].rc_data;
+		p = rm->rm_col[VDEV_RAIDZ_P].rc_data;
+		q = rm->rm_col[VDEV_RAIDZ_Q].rc_data;
+
+		ccnt = rm->rm_col[c].rc_size / sizeof (src[0]);
+
+		if (c == rm->rm_firstdatacol) {
+			ASSERT(ccnt == pcnt || ccnt == 0);
+			for (i = 0; i < ccnt; i++, src++, p++, q++) {
+				*p = *src;
+				*q = *src;
+			}
+			for (; i < pcnt; i++, src++, p++, q++) {
+				*p = 0;
+				*q = 0;
+			}
+		} else {
+			ASSERT(ccnt <= pcnt);
+
+			/*
+			 * Apply the algorithm described above by multiplying
+			 * the previous result and adding in the new value.
+			 */
+			for (i = 0; i < ccnt; i++, src++, p++, q++) {
+				*p ^= *src;
+
+				VDEV_RAIDZ_64MUL_2(*q, mask);
+				*q ^= *src;
+			}
+
+			/*
+			 * Treat short columns as though they are full of 0s.
+			 * Note that there's therefore nothing needed for P.
+			 */
+			for (; i < pcnt; i++, q++) {
+				VDEV_RAIDZ_64MUL_2(*q, mask);
+			}
+		}
+	}
+}
+
+static void
+vdev_raidz_generate_parity_pqr(raidz_map_t *rm)
+{
+	uint64_t *p, *q, *r, *src, pcnt, ccnt, mask, i;
+	int c;
+
+	pcnt = rm->rm_col[VDEV_RAIDZ_P].rc_size / sizeof (src[0]);
+	ASSERT(rm->rm_col[VDEV_RAIDZ_P].rc_size ==
+	    rm->rm_col[VDEV_RAIDZ_Q].rc_size);
+	ASSERT(rm->rm_col[VDEV_RAIDZ_P].rc_size ==
+	    rm->rm_col[VDEV_RAIDZ_R].rc_size);
+
+	for (c = rm->rm_firstdatacol; c < rm->rm_cols; c++) {
+		src = rm->rm_col[c].rc_data;
+		p = rm->rm_col[VDEV_RAIDZ_P].rc_data;
+		q = rm->rm_col[VDEV_RAIDZ_Q].rc_data;
+		r = rm->rm_col[VDEV_RAIDZ_R].rc_data;
+
+		ccnt = rm->rm_col[c].rc_size / sizeof (src[0]);
+
+		if (c == rm->rm_firstdatacol) {
+			ASSERT(ccnt == pcnt || ccnt == 0);
+			for (i = 0; i < ccnt; i++, src++, p++, q++, r++) {
+				*p = *src;
+				*q = *src;
+				*r = *src;
+			}
+			for (; i < pcnt; i++, src++, p++, q++, r++) {
+				*p = 0;
+				*q = 0;
+				*r = 0;
+			}
+		} else {
+			ASSERT(ccnt <= pcnt);
+
+			/*
+			 * Apply the algorithm described above by multiplying
+			 * the previous result and adding in the new value.
+			 */
+			for (i = 0; i < ccnt; i++, src++, p++, q++, r++) {
+				*p ^= *src;
+
+				VDEV_RAIDZ_64MUL_2(*q, mask);
+				*q ^= *src;
+
+				VDEV_RAIDZ_64MUL_4(*r, mask);
+				*r ^= *src;
+			}
+
+			/*
+			 * Treat short columns as though they are full of 0s.
+			 * Note that there's therefore nothing needed for P.
+			 */
+			for (; i < pcnt; i++, q++, r++) {
+				VDEV_RAIDZ_64MUL_2(*q, mask);
+				VDEV_RAIDZ_64MUL_4(*r, mask);
+			}
+		}
+	}
+}
+
+/*
+ * Generate RAID parity in the first virtual columns according to the number of
+ * parity columns available.
+ */
+static void
+vdev_raidz_generate_parity(raidz_map_t *rm)
+{
+	switch (rm->rm_firstdatacol) {
+	case 1:
+		vdev_raidz_generate_parity_p(rm);
+		break;
+	case 2:
+		vdev_raidz_generate_parity_pq(rm);
+		break;
+	case 3:
+		vdev_raidz_generate_parity_pqr(rm);
+		break;
+	default:
+		cmn_err(CE_PANIC, "invalid RAID-Z configuration");
+	}
+}
+
+static int
+vdev_raidz_reconstruct_p(raidz_map_t *rm, int *tgts, int ntgts)
+{
+	uint64_t *dst, *src, xcount, ccount, count, i;
+	int x = tgts[0];
+	int c;
+
+	ASSERT(ntgts == 1);
+	ASSERT(x >= rm->rm_firstdatacol);
+	ASSERT(x < rm->rm_cols);
+
+	xcount = rm->rm_col[x].rc_size / sizeof (src[0]);
+	ASSERT(xcount <= rm->rm_col[VDEV_RAIDZ_P].rc_size / sizeof (src[0]));
+	ASSERT(xcount > 0);
+
+	src = rm->rm_col[VDEV_RAIDZ_P].rc_data;
+	dst = rm->rm_col[x].rc_data;
+	for (i = 0; i < xcount; i++, dst++, src++) {
+		*dst = *src;
+	}
+
+	for (c = rm->rm_firstdatacol; c < rm->rm_cols; c++) {
+		src = rm->rm_col[c].rc_data;
+		dst = rm->rm_col[x].rc_data;
+
+		if (c == x)
+			continue;
+
+		ccount = rm->rm_col[c].rc_size / sizeof (src[0]);
+		count = MIN(ccount, xcount);
+
+		for (i = 0; i < count; i++, dst++, src++) {
+			*dst ^= *src;
+		}
+	}
+
+	return (1 << VDEV_RAIDZ_P);
+}
+
+static int
+vdev_raidz_reconstruct_q(raidz_map_t *rm, int *tgts, int ntgts)
+{
+	uint64_t *dst, *src, xcount, ccount, count, mask, i;
+	uint8_t *b;
+	int x = tgts[0];
+	int c, j, exp;
+
+	ASSERT(ntgts == 1);
+
+	xcount = rm->rm_col[x].rc_size / sizeof (src[0]);
+	ASSERT(xcount <= rm->rm_col[VDEV_RAIDZ_Q].rc_size / sizeof (src[0]));
+
+	for (c = rm->rm_firstdatacol; c < rm->rm_cols; c++) {
+		src = rm->rm_col[c].rc_data;
+		dst = rm->rm_col[x].rc_data;
+
+		if (c == x)
+			ccount = 0;
+		else
+			ccount = rm->rm_col[c].rc_size / sizeof (src[0]);
+
+		count = MIN(ccount, xcount);
+
+		if (c == rm->rm_firstdatacol) {
+			for (i = 0; i < count; i++, dst++, src++) {
+				*dst = *src;
+			}
+			for (; i < xcount; i++, dst++) {
+				*dst = 0;
+			}
+
+		} else {
+			for (i = 0; i < count; i++, dst++, src++) {
+				VDEV_RAIDZ_64MUL_2(*dst, mask);
+				*dst ^= *src;
+			}
+
+			for (; i < xcount; i++, dst++) {
+				VDEV_RAIDZ_64MUL_2(*dst, mask);
+			}
+		}
+	}
+
+	src = rm->rm_col[VDEV_RAIDZ_Q].rc_data;
+	dst = rm->rm_col[x].rc_data;
+	exp = 255 - (rm->rm_cols - 1 - x);
+
+	for (i = 0; i < xcount; i++, dst++, src++) {
+		*dst ^= *src;
+		for (j = 0, b = (uint8_t *)dst; j < 8; j++, b++) {
+			*b = vdev_raidz_exp2(*b, exp);
+		}
+	}
+
+	return (1 << VDEV_RAIDZ_Q);
+}
+
+static int
+vdev_raidz_reconstruct_pq(raidz_map_t *rm, int *tgts, int ntgts)
+{
+	uint8_t *p, *q, *pxy, *qxy, *xd, *yd, tmp, a, b, aexp, bexp;
+	void *pdata, *qdata;
+	uint64_t xsize, ysize, i;
+	int x = tgts[0];
+	int y = tgts[1];
+
+	ASSERT(ntgts == 2);
+	ASSERT(x < y);
+	ASSERT(x >= rm->rm_firstdatacol);
+	ASSERT(y < rm->rm_cols);
+
+	ASSERT(rm->rm_col[x].rc_size >= rm->rm_col[y].rc_size);
+
+	/*
+	 * Move the parity data aside -- we're going to compute parity as
+	 * though columns x and y were full of zeros -- Pxy and Qxy. We want to
+	 * reuse the parity generation mechanism without trashing the actual
+	 * parity so we make those columns appear to be full of zeros by
+	 * setting their lengths to zero.
+	 */
+	pdata = rm->rm_col[VDEV_RAIDZ_P].rc_data;
+	qdata = rm->rm_col[VDEV_RAIDZ_Q].rc_data;
+	xsize = rm->rm_col[x].rc_size;
+	ysize = rm->rm_col[y].rc_size;
+
+	rm->rm_col[VDEV_RAIDZ_P].rc_data =
+	    zio_buf_alloc(rm->rm_col[VDEV_RAIDZ_P].rc_size);
+	rm->rm_col[VDEV_RAIDZ_Q].rc_data =
+	    zio_buf_alloc(rm->rm_col[VDEV_RAIDZ_Q].rc_size);
+	rm->rm_col[x].rc_size = 0;
+	rm->rm_col[y].rc_size = 0;
+
+	vdev_raidz_generate_parity_pq(rm);
+
+	rm->rm_col[x].rc_size = xsize;
+	rm->rm_col[y].rc_size = ysize;
+
+	p = pdata;
+	q = qdata;
+	pxy = rm->rm_col[VDEV_RAIDZ_P].rc_data;
+	qxy = rm->rm_col[VDEV_RAIDZ_Q].rc_data;
+	xd = rm->rm_col[x].rc_data;
+	yd = rm->rm_col[y].rc_data;
+
+	/*
+	 * We now have:
+	 *	Pxy = P + D_x + D_y
+	 *	Qxy = Q + 2^(ndevs - 1 - x) * D_x + 2^(ndevs - 1 - y) * D_y
+	 *
+	 * We can then solve for D_x:
+	 *	D_x = A * (P + Pxy) + B * (Q + Qxy)
+	 * where
+	 *	A = 2^(x - y) * (2^(x - y) + 1)^-1
+	 *	B = 2^(ndevs - 1 - x) * (2^(x - y) + 1)^-1
+	 *
+	 * With D_x in hand, we can easily solve for D_y:
+	 *	D_y = P + Pxy + D_x
+	 */
+
+	a = vdev_raidz_pow2[255 + x - y];
+	b = vdev_raidz_pow2[255 - (rm->rm_cols - 1 - x)];
+	tmp = 255 - vdev_raidz_log2[a ^ 1];
+
+	aexp = vdev_raidz_log2[vdev_raidz_exp2(a, tmp)];
+	bexp = vdev_raidz_log2[vdev_raidz_exp2(b, tmp)];
+
+	for (i = 0; i < xsize; i++, p++, q++, pxy++, qxy++, xd++, yd++) {
+		*xd = vdev_raidz_exp2(*p ^ *pxy, aexp) ^
+		    vdev_raidz_exp2(*q ^ *qxy, bexp);
+
+		if (i < ysize)
+			*yd = *p ^ *pxy ^ *xd;
+	}
+
+	zio_buf_free(rm->rm_col[VDEV_RAIDZ_P].rc_data,
+	    rm->rm_col[VDEV_RAIDZ_P].rc_size);
+	zio_buf_free(rm->rm_col[VDEV_RAIDZ_Q].rc_data,
+	    rm->rm_col[VDEV_RAIDZ_Q].rc_size);
+
+	/*
+	 * Restore the saved parity data.
+	 */
+	rm->rm_col[VDEV_RAIDZ_P].rc_data = pdata;
+	rm->rm_col[VDEV_RAIDZ_Q].rc_data = qdata;
+
+	return ((1 << VDEV_RAIDZ_P) | (1 << VDEV_RAIDZ_Q));
+}
+
+/* BEGIN CSTYLED */
+/*
+ * In the general case of reconstruction, we must solve the system of linear
+ * equations defined by the coeffecients used to generate parity as well as
+ * the contents of the data and parity disks. This can be expressed with
+ * vectors for the original data (D) and the actual data (d) and parity (p)
+ * and a matrix composed of the identity matrix (I) and a dispersal matrix (V):
+ *
+ *            __   __                     __     __
+ *            |     |         __     __   |  p_0  |
+ *            |  V  |         |  D_0  |   | p_m-1 |
+ *            |     |    x    |   :   | = |  d_0  |
+ *            |  I  |         | D_n-1 |   |   :   |
+ *            |     |         ~~     ~~   | d_n-1 |
+ *            ~~   ~~                     ~~     ~~
+ *
+ * I is simply a square identity matrix of size n, and V is a vandermonde
+ * matrix defined by the coeffecients we chose for the various parity columns
+ * (1, 2, 4). Note that these values were chosen both for simplicity, speedy
+ * computation as well as linear separability.
+ *
+ *      __               __               __     __
+ *      |   1   ..  1 1 1 |               |  p_0  |
+ *      | 2^n-1 ..  4 2 1 |   __     __   |   :   |
+ *      | 4^n-1 .. 16 4 1 |   |  D_0  |   | p_m-1 |
+ *      |   1   ..  0 0 0 |   |  D_1  |   |  d_0  |
+ *      |   0   ..  0 0 0 | x |  D_2  | = |  d_1  |
+ *      |   :       : : : |   |   :   |   |  d_2  |
+ *      |   0   ..  1 0 0 |   | D_n-1 |   |   :   |
+ *      |   0   ..  0 1 0 |   ~~     ~~   |   :   |
+ *      |   0   ..  0 0 1 |               | d_n-1 |
+ *      ~~               ~~               ~~     ~~
+ *
+ * Note that I, V, d, and p are known. To compute D, we must invert the
+ * matrix and use the known data and parity values to reconstruct the unknown
+ * data values. We begin by removing the rows in V|I and d|p that correspond
+ * to failed or missing columns; we then make V|I square (n x n) and d|p
+ * sized n by removing rows corresponding to unused parity from the bottom up
+ * to generate (V|I)' and (d|p)'. We can then generate the inverse of (V|I)'
+ * using Gauss-Jordan elimination. In the example below we use m=3 parity
+ * columns, n=8 data columns, with errors in d_1, d_2, and p_1:
+ *           __                               __
+ *           |  1   1   1   1   1   1   1   1  |
+ *           | 128  64  32  16  8   4   2   1  | <-----+-+-- missing disks
+ *           |  19 205 116  29  64  16  4   1  |      / /
+ *           |  1   0   0   0   0   0   0   0  |     / /
+ *           |  0   1   0   0   0   0   0   0  | <--' /
+ *  (V|I)  = |  0   0   1   0   0   0   0   0  | <---'
+ *           |  0   0   0   1   0   0   0   0  |
+ *           |  0   0   0   0   1   0   0   0  |
+ *           |  0   0   0   0   0   1   0   0  |
+ *           |  0   0   0   0   0   0   1   0  |
+ *           |  0   0   0   0   0   0   0   1  |
+ *           ~~                               ~~
+ *           __                               __
+ *           |  1   1   1   1   1   1   1   1  |
+ *           | 128  64  32  16  8   4   2   1  |
+ *           |  19 205 116  29  64  16  4   1  |
+ *           |  1   0   0   0   0   0   0   0  |
+ *           |  0   1   0   0   0   0   0   0  |
+ *  (V|I)' = |  0   0   1   0   0   0   0   0  |
+ *           |  0   0   0   1   0   0   0   0  |
+ *           |  0   0   0   0   1   0   0   0  |
+ *           |  0   0   0   0   0   1   0   0  |
+ *           |  0   0   0   0   0   0   1   0  |
+ *           |  0   0   0   0   0   0   0   1  |
+ *           ~~                               ~~
+ *
+ * Here we employ Gauss-Jordan elimination to find the inverse of (V|I)'. We
+ * have carefully chosen the seed values 1, 2, and 4 to ensure that this
+ * matrix is not singular.
+ * __                                                                 __
+ * |  1   1   1   1   1   1   1   1     1   0   0   0   0   0   0   0  |
+ * |  19 205 116  29  64  16  4   1     0   1   0   0   0   0   0   0  |
+ * |  1   0   0   0   0   0   0   0     0   0   1   0   0   0   0   0  |
+ * |  0   0   0   1   0   0   0   0     0   0   0   1   0   0   0   0  |
+ * |  0   0   0   0   1   0   0   0     0   0   0   0   1   0   0   0  |
+ * |  0   0   0   0   0   1   0   0     0   0   0   0   0   1   0   0  |
+ * |  0   0   0   0   0   0   1   0     0   0   0   0   0   0   1   0  |
+ * |  0   0   0   0   0   0   0   1     0   0   0   0   0   0   0   1  |
+ * ~~                                                                 ~~
+ * __                                                                 __
+ * |  1   0   0   0   0   0   0   0     0   0   1   0   0   0   0   0  |
+ * |  1   1   1   1   1   1   1   1     1   0   0   0   0   0   0   0  |
+ * |  19 205 116  29  64  16  4   1     0   1   0   0   0   0   0   0  |
+ * |  0   0   0   1   0   0   0   0     0   0   0   1   0   0   0   0  |
+ * |  0   0   0   0   1   0   0   0     0   0   0   0   1   0   0   0  |
+ * |  0   0   0   0   0   1   0   0     0   0   0   0   0   1   0   0  |
+ * |  0   0   0   0   0   0   1   0     0   0   0   0   0   0   1   0  |
+ * |  0   0   0   0   0   0   0   1     0   0   0   0   0   0   0   1  |
+ * ~~                                                                 ~~
+ * __                                                                 __
+ * |  1   0   0   0   0   0   0   0     0   0   1   0   0   0   0   0  |
+ * |  0   1   1   0   0   0   0   0     1   0   1   1   1   1   1   1  |
+ * |  0  205 116  0   0   0   0   0     0   1   19  29  64  16  4   1  |
+ * |  0   0   0   1   0   0   0   0     0   0   0   1   0   0   0   0  |
+ * |  0   0   0   0   1   0   0   0     0   0   0   0   1   0   0   0  |
+ * |  0   0   0   0   0   1   0   0     0   0   0   0   0   1   0   0  |
+ * |  0   0   0   0   0   0   1   0     0   0   0   0   0   0   1   0  |
+ * |  0   0   0   0   0   0   0   1     0   0   0   0   0   0   0   1  |
+ * ~~                                                                 ~~
+ * __                                                                 __
+ * |  1   0   0   0   0   0   0   0     0   0   1   0   0   0   0   0  |
+ * |  0   1   1   0   0   0   0   0     1   0   1   1   1   1   1   1  |
+ * |  0   0  185  0   0   0   0   0    205  1  222 208 141 221 201 204 |
+ * |  0   0   0   1   0   0   0   0     0   0   0   1   0   0   0   0  |
+ * |  0   0   0   0   1   0   0   0     0   0   0   0   1   0   0   0  |
+ * |  0   0   0   0   0   1   0   0     0   0   0   0   0   1   0   0  |
+ * |  0   0   0   0   0   0   1   0     0   0   0   0   0   0   1   0  |
+ * |  0   0   0   0   0   0   0   1     0   0   0   0   0   0   0   1  |
+ * ~~                                                                 ~~
+ * __                                                                 __
+ * |  1   0   0   0   0   0   0   0     0   0   1   0   0   0   0   0  |
+ * |  0   1   1   0   0   0   0   0     1   0   1   1   1   1   1   1  |
+ * |  0   0   1   0   0   0   0   0    166 100  4   40 158 168 216 209 |
+ * |  0   0   0   1   0   0   0   0     0   0   0   1   0   0   0   0  |
+ * |  0   0   0   0   1   0   0   0     0   0   0   0   1   0   0   0  |
+ * |  0   0   0   0   0   1   0   0     0   0   0   0   0   1   0   0  |
+ * |  0   0   0   0   0   0   1   0     0   0   0   0   0   0   1   0  |
+ * |  0   0   0   0   0   0   0   1     0   0   0   0   0   0   0   1  |
+ * ~~                                                                 ~~
+ * __                                                                 __
+ * |  1   0   0   0   0   0   0   0     0   0   1   0   0   0   0   0  |
+ * |  0   1   0   0   0   0   0   0    167 100  5   41 159 169 217 208 |
+ * |  0   0   1   0   0   0   0   0    166 100  4   40 158 168 216 209 |
+ * |  0   0   0   1   0   0   0   0     0   0   0   1   0   0   0   0  |
+ * |  0   0   0   0   1   0   0   0     0   0   0   0   1   0   0   0  |
+ * |  0   0   0   0   0   1   0   0     0   0   0   0   0   1   0   0  |
+ * |  0   0   0   0   0   0   1   0     0   0   0   0   0   0   1   0  |
+ * |  0   0   0   0   0   0   0   1     0   0   0   0   0   0   0   1  |
+ * ~~                                                                 ~~
+ *                   __                               __
+ *                   |  0   0   1   0   0   0   0   0  |
+ *                   | 167 100  5   41 159 169 217 208 |
+ *                   | 166 100  4   40 158 168 216 209 |
+ *       (V|I)'^-1 = |  0   0   0   1   0   0   0   0  |
+ *                   |  0   0   0   0   1   0   0   0  |
+ *                   |  0   0   0   0   0   1   0   0  |
+ *                   |  0   0   0   0   0   0   1   0  |
+ *                   |  0   0   0   0   0   0   0   1  |
+ *                   ~~                               ~~
+ *
+ * We can then simply compute D = (V|I)'^-1 x (d|p)' to discover the values
+ * of the missing data.
+ *
+ * As is apparent from the example above, the only non-trivial rows in the
+ * inverse matrix correspond to the data disks that we're trying to
+ * reconstruct. Indeed, those are the only rows we need as the others would
+ * only be useful for reconstructing data known or assumed to be valid. For
+ * that reason, we only build the coefficients in the rows that correspond to
+ * targeted columns.
+ */
+/* END CSTYLED */
+
+static void
+vdev_raidz_matrix_init(raidz_map_t *rm, int n, int nmap, int *map,
+    uint8_t **rows)
+{
+	int i, j;
+	int pow;
+
+	ASSERT(n == rm->rm_cols - rm->rm_firstdatacol);
+
+	/*
+	 * Fill in the missing rows of interest.
+	 */
+	for (i = 0; i < nmap; i++) {
+		ASSERT3S(0, <=, map[i]);
+		ASSERT3S(map[i], <=, 2);
+
+		pow = map[i] * n;
+		if (pow > 255)
+			pow -= 255;
+		ASSERT(pow <= 255);
+
+		for (j = 0; j < n; j++) {
+			pow -= map[i];
+			if (pow < 0)
+				pow += 255;
+			rows[i][j] = vdev_raidz_pow2[pow];
+		}
+	}
+}
+
+static void
+vdev_raidz_matrix_invert(raidz_map_t *rm, int n, int nmissing, int *missing,
+    uint8_t **rows, uint8_t **invrows, const uint8_t *used)
+{
+	int i, j, ii, jj;
+	uint8_t log;
+
+	/*
+	 * Assert that the first nmissing entries from the array of used
+	 * columns correspond to parity columns and that subsequent entries
+	 * correspond to data columns.
+	 */
+	for (i = 0; i < nmissing; i++) {
+		ASSERT3S(used[i], <, rm->rm_firstdatacol);
+	}
+	for (; i < n; i++) {
+		ASSERT3S(used[i], >=, rm->rm_firstdatacol);
+	}
+
+	/*
+	 * First initialize the storage where we'll compute the inverse rows.
+	 */
+	for (i = 0; i < nmissing; i++) {
+		for (j = 0; j < n; j++) {
+			invrows[i][j] = (i == j) ? 1 : 0;
+		}
+	}
+
+	/*
+	 * Subtract all trivial rows from the rows of consequence.
+	 */
+	for (i = 0; i < nmissing; i++) {
+		for (j = nmissing; j < n; j++) {
+			ASSERT3U(used[j], >=, rm->rm_firstdatacol);
+			jj = used[j] - rm->rm_firstdatacol;
+			ASSERT3S(jj, <, n);
+			invrows[i][j] = rows[i][jj];
+			rows[i][jj] = 0;
+		}
+	}
+
+	/*
+	 * For each of the rows of interest, we must normalize it and subtract
+	 * a multiple of it from the other rows.
+	 */
+	for (i = 0; i < nmissing; i++) {
+		for (j = 0; j < missing[i]; j++) {
+			ASSERT3U(rows[i][j], ==, 0);
+		}
+		ASSERT3U(rows[i][missing[i]], !=, 0);
+
+		/*
+		 * Compute the inverse of the first element and multiply each
+		 * element in the row by that value.
+		 */
+		log = 255 - vdev_raidz_log2[rows[i][missing[i]]];
+
+		for (j = 0; j < n; j++) {
+			rows[i][j] = vdev_raidz_exp2(rows[i][j], log);
+			invrows[i][j] = vdev_raidz_exp2(invrows[i][j], log);
+		}
+
+		for (ii = 0; ii < nmissing; ii++) {
+			if (i == ii)
+				continue;
+
+			ASSERT3U(rows[ii][missing[i]], !=, 0);
+
+			log = vdev_raidz_log2[rows[ii][missing[i]]];
+
+			for (j = 0; j < n; j++) {
+				rows[ii][j] ^=
+				    vdev_raidz_exp2(rows[i][j], log);
+				invrows[ii][j] ^=
+				    vdev_raidz_exp2(invrows[i][j], log);
+			}
+		}
+	}
+
+	/*
+	 * Verify that the data that is left in the rows are properly part of
+	 * an identity matrix.
+	 */
+	for (i = 0; i < nmissing; i++) {
+		for (j = 0; j < n; j++) {
+			if (j == missing[i]) {
+				ASSERT3U(rows[i][j], ==, 1);
+			} else {
+				ASSERT3U(rows[i][j], ==, 0);
+			}
+		}
+	}
+}
+
+static void
+vdev_raidz_matrix_reconstruct(raidz_map_t *rm, int n, int nmissing,
+    int *missing, uint8_t **invrows, const uint8_t *used)
+{
+	int i, j, x, cc, c;
+	uint8_t *src;
+	uint64_t ccount;
+	uint8_t *dst[VDEV_RAIDZ_MAXPARITY];
+	uint64_t dcount[VDEV_RAIDZ_MAXPARITY];
+	uint8_t log, val;
+	int ll;
+	uint8_t *invlog[VDEV_RAIDZ_MAXPARITY];
+	uint8_t *p, *pp;
+	size_t psize;
+
+	psize = sizeof (invlog[0][0]) * n * nmissing;
+	p = kmem_alloc(psize, KM_SLEEP);
+
+	for (pp = p, i = 0; i < nmissing; i++) {
+		invlog[i] = pp;
+		pp += n;
+	}
+
+	for (i = 0; i < nmissing; i++) {
+		for (j = 0; j < n; j++) {
+			ASSERT3U(invrows[i][j], !=, 0);
+			invlog[i][j] = vdev_raidz_log2[invrows[i][j]];
+		}
+	}
+
+	for (i = 0; i < n; i++) {
+		c = used[i];
+		ASSERT3U(c, <, rm->rm_cols);
+
+		src = rm->rm_col[c].rc_data;
+		ccount = rm->rm_col[c].rc_size;
+		for (j = 0; j < nmissing; j++) {
+			cc = missing[j] + rm->rm_firstdatacol;
+			ASSERT3U(cc, >=, rm->rm_firstdatacol);
+			ASSERT3U(cc, <, rm->rm_cols);
+			ASSERT3U(cc, !=, c);
+
+			dst[j] = rm->rm_col[cc].rc_data;
+			dcount[j] = rm->rm_col[cc].rc_size;
+		}
+
+		ASSERT(ccount >= rm->rm_col[missing[0]].rc_size || i > 0);
+
+		for (x = 0; x < ccount; x++, src++) {
+			if (*src != 0)
+				log = vdev_raidz_log2[*src];
+
+			for (cc = 0; cc < nmissing; cc++) {
+				if (x >= dcount[cc])
+					continue;
+
+				if (*src == 0) {
+					val = 0;
+				} else {
+					if ((ll = log + invlog[cc][i]) >= 255)
+						ll -= 255;
+					val = vdev_raidz_pow2[ll];
+				}
+
+				if (i == 0)
+					dst[cc][x] = val;
+				else
+					dst[cc][x] ^= val;
+			}
+		}
+	}
+
+	kmem_free(p, psize);
+}
+
+static int
+vdev_raidz_reconstruct_general(raidz_map_t *rm, int *tgts, int ntgts)
+{
+	int n, i, c, t, tt;
+	int nmissing_rows;
+	int missing_rows[VDEV_RAIDZ_MAXPARITY];
+	int parity_map[VDEV_RAIDZ_MAXPARITY];
+
+	uint8_t *p, *pp;
+	size_t psize;
+
+	uint8_t *rows[VDEV_RAIDZ_MAXPARITY];
+	uint8_t *invrows[VDEV_RAIDZ_MAXPARITY];
+	uint8_t *used;
+
+	int code = 0;
+
+
+	n = rm->rm_cols - rm->rm_firstdatacol;
+
+	/*
+	 * Figure out which data columns are missing.
+	 */
+	nmissing_rows = 0;
+	for (t = 0; t < ntgts; t++) {
+		if (tgts[t] >= rm->rm_firstdatacol) {
+			missing_rows[nmissing_rows++] =
+			    tgts[t] - rm->rm_firstdatacol;
+		}
+	}
+
+	/*
+	 * Figure out which parity columns to use to help generate the missing
+	 * data columns.
+	 */
+	for (tt = 0, c = 0, i = 0; i < nmissing_rows; c++) {
+		ASSERT(tt < ntgts);
+		ASSERT(c < rm->rm_firstdatacol);
+
+		/*
+		 * Skip any targeted parity columns.
+		 */
+		if (c == tgts[tt]) {
+			tt++;
+			continue;
+		}
+
+		code |= 1 << c;
+
+		parity_map[i] = c;
+		i++;
+	}
+
+	ASSERT(code != 0);
+	ASSERT3U(code, <, 1 << VDEV_RAIDZ_MAXPARITY);
+
+	psize = (sizeof (rows[0][0]) + sizeof (invrows[0][0])) *
+	    nmissing_rows * n + sizeof (used[0]) * n;
+	p = kmem_alloc(psize, KM_SLEEP);
+
+	for (pp = p, i = 0; i < nmissing_rows; i++) {
+		rows[i] = pp;
+		pp += n;
+		invrows[i] = pp;
+		pp += n;
+	}
+	used = pp;
+
+	for (i = 0; i < nmissing_rows; i++) {
+		used[i] = parity_map[i];
+	}
+
+	for (tt = 0, c = rm->rm_firstdatacol; c < rm->rm_cols; c++) {
+		if (tt < nmissing_rows &&
+		    c == missing_rows[tt] + rm->rm_firstdatacol) {
+			tt++;
+			continue;
+		}
+
+		ASSERT3S(i, <, n);
+		used[i] = c;
+		i++;
+	}
+
+	/*
+	 * Initialize the interesting rows of the matrix.
+	 */
+	vdev_raidz_matrix_init(rm, n, nmissing_rows, parity_map, rows);
+
+	/*
+	 * Invert the matrix.
+	 */
+	vdev_raidz_matrix_invert(rm, n, nmissing_rows, missing_rows, rows,
+	    invrows, used);
+
+	/*
+	 * Reconstruct the missing data using the generated matrix.
+	 */
+	vdev_raidz_matrix_reconstruct(rm, n, nmissing_rows, missing_rows,
+	    invrows, used);
+
+	kmem_free(p, psize);
+
+	return (code);
+}
+
+static int
+vdev_raidz_reconstruct(raidz_map_t *rm, int *t, int nt)
+{
+	int tgts[VDEV_RAIDZ_MAXPARITY], *dt;
+	int ntgts;
+	int i, c;
+	int code;
+	int nbadparity, nbaddata;
+	int parity_valid[VDEV_RAIDZ_MAXPARITY];
+
+	/*
+	 * The tgts list must already be sorted.
+	 */
+	for (i = 1; i < nt; i++) {
+		ASSERT(t[i] > t[i - 1]);
+	}
+
+	nbadparity = rm->rm_firstdatacol;
+	nbaddata = rm->rm_cols - nbadparity;
+	ntgts = 0;
+	for (i = 0, c = 0; c < rm->rm_cols; c++) {
+		if (c < rm->rm_firstdatacol)
+			parity_valid[c] = B_FALSE;
+
+		if (i < nt && c == t[i]) {
+			tgts[ntgts++] = c;
+			i++;
+		} else if (rm->rm_col[c].rc_error != 0) {
+			tgts[ntgts++] = c;
+		} else if (c >= rm->rm_firstdatacol) {
+			nbaddata--;
+		} else {
+			parity_valid[c] = B_TRUE;
+			nbadparity--;
+		}
+	}
+
+	ASSERT(ntgts >= nt);
+	ASSERT(nbaddata >= 0);
+	ASSERT(nbaddata + nbadparity == ntgts);
+
+	dt = &tgts[nbadparity];
+
+	/*
+	 * See if we can use any of our optimized reconstruction routines.
+	 */
+	if (!vdev_raidz_default_to_general) {
+		switch (nbaddata) {
+		case 1:
+			if (parity_valid[VDEV_RAIDZ_P])
+				return (vdev_raidz_reconstruct_p(rm, dt, 1));
+
+			ASSERT(rm->rm_firstdatacol > 1);
+
+			if (parity_valid[VDEV_RAIDZ_Q])
+				return (vdev_raidz_reconstruct_q(rm, dt, 1));
+
+			ASSERT(rm->rm_firstdatacol > 2);
+			break;
+
+		case 2:
+			ASSERT(rm->rm_firstdatacol > 1);
+
+			if (parity_valid[VDEV_RAIDZ_P] &&
+			    parity_valid[VDEV_RAIDZ_Q])
+				return (vdev_raidz_reconstruct_pq(rm, dt, 2));
+
+			ASSERT(rm->rm_firstdatacol > 2);
+
+			break;
+		}
+	}
+
+	code = vdev_raidz_reconstruct_general(rm, tgts, ntgts);
+	ASSERT(code < (1 << VDEV_RAIDZ_MAXPARITY));
+	ASSERT(code > 0);
+	return (code);
+}
+
+static int
+vdev_raidz_open(vdev_t *vd, uint64_t *asize, uint64_t *ashift)
+{
+	vdev_t *cvd;
+	uint64_t nparity = vd->vdev_nparity;
+	int c;
+	int lasterror = 0;
+	int numerrors = 0;
+
+	ASSERT(nparity > 0);
+
+	if (nparity > VDEV_RAIDZ_MAXPARITY ||
+	    vd->vdev_children < nparity + 1) {
+		vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
+		return (EINVAL);
+	}
+
+	vdev_open_children(vd);
+
+	for (c = 0; c < vd->vdev_children; c++) {
+		cvd = vd->vdev_child[c];
+
+		if (cvd->vdev_open_error != 0) {
+			lasterror = cvd->vdev_open_error;
+			numerrors++;
+			continue;
+		}
+
+		*asize = MIN(*asize - 1, cvd->vdev_asize - 1) + 1;
+		*ashift = MAX(*ashift, cvd->vdev_ashift);
+	}
+
+	*asize *= vd->vdev_children;
+
+	if (numerrors > nparity) {
+		vd->vdev_stat.vs_aux = VDEV_AUX_NO_REPLICAS;
+		return (lasterror);
+	}
+
+	return (0);
+}
+
+static void
+vdev_raidz_close(vdev_t *vd)
+{
+	int c;
+
+	for (c = 0; c < vd->vdev_children; c++)
+		vdev_close(vd->vdev_child[c]);
+}
+
+static uint64_t
+vdev_raidz_asize(vdev_t *vd, uint64_t psize)
+{
+	uint64_t asize;
+	uint64_t ashift = vd->vdev_top->vdev_ashift;
+	uint64_t cols = vd->vdev_children;
+	uint64_t nparity = vd->vdev_nparity;
+
+	asize = ((psize - 1) >> ashift) + 1;
+	asize += nparity * ((asize + cols - nparity - 1) / (cols - nparity));
+	asize = roundup(asize, nparity + 1) << ashift;
+
+	return (asize);
+}
+
+static void
+vdev_raidz_child_done(zio_t *zio)
+{
+	raidz_col_t *rc = zio->io_private;
+
+	rc->rc_error = zio->io_error;
+	rc->rc_tried = 1;
+	rc->rc_skipped = 0;
+}
+
+static int
+vdev_raidz_io_start(zio_t *zio)
+{
+	vdev_t *vd = zio->io_vd;
+	vdev_t *tvd = vd->vdev_top;
+	vdev_t *cvd;
+	raidz_map_t *rm;
+	raidz_col_t *rc;
+	int c, i;
+
+	rm = vdev_raidz_map_alloc(zio, tvd->vdev_ashift, vd->vdev_children,
+	    vd->vdev_nparity);
+
+	ASSERT3U(rm->rm_asize, ==, vdev_psize_to_asize(vd, zio->io_size));
+
+	if (zio->io_type == ZIO_TYPE_WRITE) {
+		vdev_raidz_generate_parity(rm);
+
+		for (c = 0; c < rm->rm_cols; c++) {
+			rc = &rm->rm_col[c];
+			cvd = vd->vdev_child[rc->rc_devidx];
+			zio_nowait(zio_vdev_child_io(zio, NULL, cvd,
+			    rc->rc_offset, rc->rc_data, rc->rc_size,
+			    zio->io_type, zio->io_priority, 0,
+			    vdev_raidz_child_done, rc));
+		}
+
+		/*
+		 * Generate optional I/Os for any skipped sectors to improve
+		 * aggregation contiguity.
+		 */
+		for (c = rm->rm_skipstart, i = 0; i < rm->rm_nskip; c++, i++) {
+			ASSERT(c <= rm->rm_scols);
+			if (c == rm->rm_scols)
+				c = 0;
+			rc = &rm->rm_col[c];
+			cvd = vd->vdev_child[rc->rc_devidx];
+			zio_nowait(zio_vdev_child_io(zio, NULL, cvd,
+			    rc->rc_offset + rc->rc_size, NULL,
+			    1 << tvd->vdev_ashift,
+			    zio->io_type, zio->io_priority,
+			    ZIO_FLAG_NODATA | ZIO_FLAG_OPTIONAL, NULL, NULL));
+		}
+
+		return (ZIO_PIPELINE_CONTINUE);
+	}
+
+	ASSERT(zio->io_type == ZIO_TYPE_READ);
+
+	/*
+	 * Iterate over the columns in reverse order so that we hit the parity
+	 * last -- any errors along the way will force us to read the parity.
+	 */
+	for (c = rm->rm_cols - 1; c >= 0; c--) {
+		rc = &rm->rm_col[c];
+		cvd = vd->vdev_child[rc->rc_devidx];
+		if (!vdev_readable(cvd)) {
+			if (c >= rm->rm_firstdatacol)
+				rm->rm_missingdata++;
+			else
+				rm->rm_missingparity++;
+			rc->rc_error = ENXIO;
+			rc->rc_tried = 1;	/* don't even try */
+			rc->rc_skipped = 1;
+			continue;
+		}
+		if (vdev_dtl_contains(cvd, DTL_MISSING, zio->io_txg, 1)) {
+			if (c >= rm->rm_firstdatacol)
+				rm->rm_missingdata++;
+			else
+				rm->rm_missingparity++;
+			rc->rc_error = ESTALE;
+			rc->rc_skipped = 1;
+			continue;
+		}
+		if (c >= rm->rm_firstdatacol || rm->rm_missingdata > 0 ||
+		    (zio->io_flags & (ZIO_FLAG_SCRUB | ZIO_FLAG_RESILVER))) {
+			zio_nowait(zio_vdev_child_io(zio, NULL, cvd,
+			    rc->rc_offset, rc->rc_data, rc->rc_size,
+			    zio->io_type, zio->io_priority, 0,
+			    vdev_raidz_child_done, rc));
+		}
+	}
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+
+/*
+ * Report a checksum error for a child of a RAID-Z device.
+ */
+static void
+raidz_checksum_error(zio_t *zio, raidz_col_t *rc, void *bad_data)
+{
+	vdev_t *vd = zio->io_vd->vdev_child[rc->rc_devidx];
+
+	if (!(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
+		zio_bad_cksum_t zbc;
+		raidz_map_t *rm = zio->io_vsd;
+
+		mutex_enter(&vd->vdev_stat_lock);
+		vd->vdev_stat.vs_checksum_errors++;
+		mutex_exit(&vd->vdev_stat_lock);
+
+		zbc.zbc_has_cksum = 0;
+		zbc.zbc_injected = rm->rm_ecksuminjected;
+
+		zfs_ereport_post_checksum(zio->io_spa, vd, zio,
+		    rc->rc_offset, rc->rc_size, rc->rc_data, bad_data,
+		    &zbc);
+	}
+}
+
+/*
+ * We keep track of whether or not there were any injected errors, so that
+ * any ereports we generate can note it.
+ */
+static int
+raidz_checksum_verify(zio_t *zio)
+{
+	zio_bad_cksum_t zbc;
+	raidz_map_t *rm = zio->io_vsd;
+
+	int ret = zio_checksum_error(zio, &zbc);
+	if (ret != 0 && zbc.zbc_injected != 0)
+		rm->rm_ecksuminjected = 1;
+
+	return (ret);
+}
+
+/*
+ * Generate the parity from the data columns. If we tried and were able to
+ * read the parity without error, verify that the generated parity matches the
+ * data we read. If it doesn't, we fire off a checksum error. Return the
+ * number such failures.
+ */
+static int
+raidz_parity_verify(zio_t *zio, raidz_map_t *rm)
+{
+	void *orig[VDEV_RAIDZ_MAXPARITY];
+	int c, ret = 0;
+	raidz_col_t *rc;
+
+	for (c = 0; c < rm->rm_firstdatacol; c++) {
+		rc = &rm->rm_col[c];
+		if (!rc->rc_tried || rc->rc_error != 0)
+			continue;
+		orig[c] = zio_buf_alloc(rc->rc_size);
+		bcopy(rc->rc_data, orig[c], rc->rc_size);
+	}
+
+	vdev_raidz_generate_parity(rm);
+
+	for (c = 0; c < rm->rm_firstdatacol; c++) {
+		rc = &rm->rm_col[c];
+		if (!rc->rc_tried || rc->rc_error != 0)
+			continue;
+		if (bcmp(orig[c], rc->rc_data, rc->rc_size) != 0) {
+			raidz_checksum_error(zio, rc, orig[c]);
+			rc->rc_error = ECKSUM;
+			ret++;
+		}
+		zio_buf_free(orig[c], rc->rc_size);
+	}
+
+	return (ret);
+}
+
+/*
+ * Keep statistics on all the ways that we used parity to correct data.
+ */
+static uint64_t raidz_corrected[1 << VDEV_RAIDZ_MAXPARITY];
+
+static int
+vdev_raidz_worst_error(raidz_map_t *rm)
+{
+	int error = 0;
+
+	for (int c = 0; c < rm->rm_cols; c++)
+		error = zio_worst_error(error, rm->rm_col[c].rc_error);
+
+	return (error);
+}
+
+/*
+ * Iterate over all combinations of bad data and attempt a reconstruction.
+ * Note that the algorithm below is non-optimal because it doesn't take into
+ * account how reconstruction is actually performed. For example, with
+ * triple-parity RAID-Z the reconstruction procedure is the same if column 4
+ * is targeted as invalid as if columns 1 and 4 are targeted since in both
+ * cases we'd only use parity information in column 0.
+ */
+static int
+vdev_raidz_combrec(zio_t *zio, int total_errors, int data_errors)
+{
+	raidz_map_t *rm = zio->io_vsd;
+	raidz_col_t *rc;
+	void *orig[VDEV_RAIDZ_MAXPARITY];
+	int tstore[VDEV_RAIDZ_MAXPARITY + 2];
+	int *tgts = &tstore[1];
+	int current, next, i, c, n;
+	int code, ret = 0;
+
+	ASSERT(total_errors < rm->rm_firstdatacol);
+
+	/*
+	 * This simplifies one edge condition.
+	 */
+	tgts[-1] = -1;
+
+	for (n = 1; n <= rm->rm_firstdatacol - total_errors; n++) {
+		/*
+		 * Initialize the targets array by finding the first n columns
+		 * that contain no error.
+		 *
+		 * If there were no data errors, we need to ensure that we're
+		 * always explicitly attempting to reconstruct at least one
+		 * data column. To do this, we simply push the highest target
+		 * up into the data columns.
+		 */
+		for (c = 0, i = 0; i < n; i++) {
+			if (i == n - 1 && data_errors == 0 &&
+			    c < rm->rm_firstdatacol) {
+				c = rm->rm_firstdatacol;
+			}
+
+			while (rm->rm_col[c].rc_error != 0) {
+				c++;
+				ASSERT3S(c, <, rm->rm_cols);
+			}
+
+			tgts[i] = c++;
+		}
+
+		/*
+		 * Setting tgts[n] simplifies the other edge condition.
+		 */
+		tgts[n] = rm->rm_cols;
+
+		/*
+		 * These buffers were allocated in previous iterations.
+		 */
+		for (i = 0; i < n - 1; i++) {
+			ASSERT(orig[i] != NULL);
+		}
+
+		orig[n - 1] = zio_buf_alloc(rm->rm_col[0].rc_size);
+
+		current = 0;
+		next = tgts[current];
+
+		while (current != n) {
+			tgts[current] = next;
+			current = 0;
+
+			/*
+			 * Save off the original data that we're going to
+			 * attempt to reconstruct.
+			 */
+			for (i = 0; i < n; i++) {
+				ASSERT(orig[i] != NULL);
+				c = tgts[i];
+				ASSERT3S(c, >=, 0);
+				ASSERT3S(c, <, rm->rm_cols);
+				rc = &rm->rm_col[c];
+				bcopy(rc->rc_data, orig[i], rc->rc_size);
+			}
+
+			/*
+			 * Attempt a reconstruction and exit the outer loop on
+			 * success.
+			 */
+			code = vdev_raidz_reconstruct(rm, tgts, n);
+			if (raidz_checksum_verify(zio) == 0) {
+				atomic_inc_64(&raidz_corrected[code]);
+
+				for (i = 0; i < n; i++) {
+					c = tgts[i];
+					rc = &rm->rm_col[c];
+					ASSERT(rc->rc_error == 0);
+					if (rc->rc_tried)
+						raidz_checksum_error(zio, rc,
+						    orig[i]);
+					rc->rc_error = ECKSUM;
+				}
+
+				ret = code;
+				goto done;
+			}
+
+			/*
+			 * Restore the original data.
+			 */
+			for (i = 0; i < n; i++) {
+				c = tgts[i];
+				rc = &rm->rm_col[c];
+				bcopy(orig[i], rc->rc_data, rc->rc_size);
+			}
+
+			do {
+				/*
+				 * Find the next valid column after the current
+				 * position..
+				 */
+				for (next = tgts[current] + 1;
+				    next < rm->rm_cols &&
+				    rm->rm_col[next].rc_error != 0; next++)
+					continue;
+
+				ASSERT(next <= tgts[current + 1]);
+
+				/*
+				 * If that spot is available, we're done here.
+				 */
+				if (next != tgts[current + 1])
+					break;
+
+				/*
+				 * Otherwise, find the next valid column after
+				 * the previous position.
+				 */
+				for (c = tgts[current - 1] + 1;
+				    rm->rm_col[c].rc_error != 0; c++)
+					continue;
+
+				tgts[current] = c;
+				current++;
+
+			} while (current != n);
+		}
+	}
+	n--;
+done:
+	for (i = 0; i < n; i++) {
+		zio_buf_free(orig[i], rm->rm_col[0].rc_size);
+	}
+
+	return (ret);
+}
+
+static void
+vdev_raidz_io_done(zio_t *zio)
+{
+	vdev_t *vd = zio->io_vd;
+	vdev_t *cvd;
+	raidz_map_t *rm = zio->io_vsd;
+	raidz_col_t *rc;
+	int unexpected_errors = 0;
+	int parity_errors = 0;
+	int parity_untried = 0;
+	int data_errors = 0;
+	int total_errors = 0;
+	int n, c;
+	int tgts[VDEV_RAIDZ_MAXPARITY];
+	int code;
+
+	ASSERT(zio->io_bp != NULL);  /* XXX need to add code to enforce this */
+
+	ASSERT(rm->rm_missingparity <= rm->rm_firstdatacol);
+	ASSERT(rm->rm_missingdata <= rm->rm_cols - rm->rm_firstdatacol);
+
+	for (c = 0; c < rm->rm_cols; c++) {
+		rc = &rm->rm_col[c];
+
+		if (rc->rc_error) {
+			ASSERT(rc->rc_error != ECKSUM);	/* child has no bp */
+
+			if (c < rm->rm_firstdatacol)
+				parity_errors++;
+			else
+				data_errors++;
+
+			if (!rc->rc_skipped)
+				unexpected_errors++;
+
+			total_errors++;
+		} else if (c < rm->rm_firstdatacol && !rc->rc_tried) {
+			parity_untried++;
+		}
+	}
+
+	if (zio->io_type == ZIO_TYPE_WRITE) {
+		/*
+		 * XXX -- for now, treat partial writes as a success.
+		 * (If we couldn't write enough columns to reconstruct
+		 * the data, the I/O failed.  Otherwise, good enough.)
+		 *
+		 * Now that we support write reallocation, it would be better
+		 * to treat partial failure as real failure unless there are
+		 * no non-degraded top-level vdevs left, and not update DTLs
+		 * if we intend to reallocate.
+		 */
+		/* XXPOLICY */
+		if (total_errors > rm->rm_firstdatacol)
+			zio->io_error = vdev_raidz_worst_error(rm);
+
+		return;
+	}
+
+	ASSERT(zio->io_type == ZIO_TYPE_READ);
+	/*
+	 * There are three potential phases for a read:
+	 *	1. produce valid data from the columns read
+	 *	2. read all disks and try again
+	 *	3. perform combinatorial reconstruction
+	 *
+	 * Each phase is progressively both more expensive and less likely to
+	 * occur. If we encounter more errors than we can repair or all phases
+	 * fail, we have no choice but to return an error.
+	 */
+
+	/*
+	 * If the number of errors we saw was correctable -- less than or equal
+	 * to the number of parity disks read -- attempt to produce data that
+	 * has a valid checksum. Naturally, this case applies in the absence of
+	 * any errors.
+	 */
+	if (total_errors <= rm->rm_firstdatacol - parity_untried) {
+		if (data_errors == 0) {
+			if (raidz_checksum_verify(zio) == 0) {
+				/*
+				 * If we read parity information (unnecessarily
+				 * as it happens since no reconstruction was
+				 * needed) regenerate and verify the parity.
+				 * We also regenerate parity when resilvering
+				 * so we can write it out to the failed device
+				 * later.
+				 */
+				if (parity_errors + parity_untried <
+				    rm->rm_firstdatacol ||
+				    (zio->io_flags & ZIO_FLAG_RESILVER)) {
+					n = raidz_parity_verify(zio, rm);
+					unexpected_errors += n;
+					ASSERT(parity_errors + n <=
+					    rm->rm_firstdatacol);
+				}
+				goto done;
+			}
+		} else {
+			/*
+			 * We either attempt to read all the parity columns or
+			 * none of them. If we didn't try to read parity, we
+			 * wouldn't be here in the correctable case. There must
+			 * also have been fewer parity errors than parity
+			 * columns or, again, we wouldn't be in this code path.
+			 */
+			ASSERT(parity_untried == 0);
+			ASSERT(parity_errors < rm->rm_firstdatacol);
+
+			/*
+			 * Identify the data columns that reported an error.
+			 */
+			n = 0;
+			for (c = rm->rm_firstdatacol; c < rm->rm_cols; c++) {
+				rc = &rm->rm_col[c];
+				if (rc->rc_error != 0) {
+					ASSERT(n < VDEV_RAIDZ_MAXPARITY);
+					tgts[n++] = c;
+				}
+			}
+
+			ASSERT(rm->rm_firstdatacol >= n);
+
+			code = vdev_raidz_reconstruct(rm, tgts, n);
+
+			if (raidz_checksum_verify(zio) == 0) {
+				atomic_inc_64(&raidz_corrected[code]);
+
+				/*
+				 * If we read more parity disks than were used
+				 * for reconstruction, confirm that the other
+				 * parity disks produced correct data. This
+				 * routine is suboptimal in that it regenerates
+				 * the parity that we already used in addition
+				 * to the parity that we're attempting to
+				 * verify, but this should be a relatively
+				 * uncommon case, and can be optimized if it
+				 * becomes a problem. Note that we regenerate
+				 * parity when resilvering so we can write it
+				 * out to failed devices later.
+				 */
+				if (parity_errors < rm->rm_firstdatacol - n ||
+				    (zio->io_flags & ZIO_FLAG_RESILVER)) {
+					n = raidz_parity_verify(zio, rm);
+					unexpected_errors += n;
+					ASSERT(parity_errors + n <=
+					    rm->rm_firstdatacol);
+				}
+
+				goto done;
+			}
+		}
+	}
+
+	/*
+	 * This isn't a typical situation -- either we got a read error or
+	 * a child silently returned bad data. Read every block so we can
+	 * try again with as much data and parity as we can track down. If
+	 * we've already been through once before, all children will be marked
+	 * as tried so we'll proceed to combinatorial reconstruction.
+	 */
+	unexpected_errors = 1;
+	rm->rm_missingdata = 0;
+	rm->rm_missingparity = 0;
+
+	for (c = 0; c < rm->rm_cols; c++) {
+		if (rm->rm_col[c].rc_tried)
+			continue;
+
+		zio_vdev_io_redone(zio);
+		do {
+			rc = &rm->rm_col[c];
+			if (rc->rc_tried)
+				continue;
+			zio_nowait(zio_vdev_child_io(zio, NULL,
+			    vd->vdev_child[rc->rc_devidx],
+			    rc->rc_offset, rc->rc_data, rc->rc_size,
+			    zio->io_type, zio->io_priority, 0,
+			    vdev_raidz_child_done, rc));
+		} while (++c < rm->rm_cols);
+
+		return;
+	}
+
+	/*
+	 * At this point we've attempted to reconstruct the data given the
+	 * errors we detected, and we've attempted to read all columns. There
+	 * must, therefore, be one or more additional problems -- silent errors
+	 * resulting in invalid data rather than explicit I/O errors resulting
+	 * in absent data. We check if there is enough additional data to
+	 * possibly reconstruct the data and then perform combinatorial
+	 * reconstruction over all possible combinations. If that fails,
+	 * we're cooked.
+	 */
+	if (total_errors > rm->rm_firstdatacol) {
+		zio->io_error = vdev_raidz_worst_error(rm);
+
+	} else if (total_errors < rm->rm_firstdatacol &&
+	    (code = vdev_raidz_combrec(zio, total_errors, data_errors)) != 0) {
+		/*
+		 * If we didn't use all the available parity for the
+		 * combinatorial reconstruction, verify that the remaining
+		 * parity is correct.
+		 */
+		if (code != (1 << rm->rm_firstdatacol) - 1)
+			(void) raidz_parity_verify(zio, rm);
+	} else {
+		/*
+		 * We're here because either:
+		 *
+		 *	total_errors == rm_first_datacol, or
+		 *	vdev_raidz_combrec() failed
+		 *
+		 * In either case, there is enough bad data to prevent
+		 * reconstruction.
+		 *
+		 * Start checksum ereports for all children which haven't
+		 * failed, and the IO wasn't speculative.
+		 */
+		zio->io_error = ECKSUM;
+
+		if (!(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
+			for (c = 0; c < rm->rm_cols; c++) {
+				rc = &rm->rm_col[c];
+				if (rc->rc_error == 0) {
+					zio_bad_cksum_t zbc;
+					zbc.zbc_has_cksum = 0;
+					zbc.zbc_injected =
+					    rm->rm_ecksuminjected;
+
+					zfs_ereport_start_checksum(
+					    zio->io_spa,
+					    vd->vdev_child[rc->rc_devidx],
+					    zio, rc->rc_offset, rc->rc_size,
+					    (void *)(uintptr_t)c, &zbc);
+				}
+			}
+		}
+	}
+
+done:
+	zio_checksum_verified(zio);
+
+	if (zio->io_error == 0 && spa_writeable(zio->io_spa) &&
+	    (unexpected_errors || (zio->io_flags & ZIO_FLAG_RESILVER))) {
+		/*
+		 * Use the good data we have in hand to repair damaged children.
+		 */
+		for (c = 0; c < rm->rm_cols; c++) {
+			rc = &rm->rm_col[c];
+			cvd = vd->vdev_child[rc->rc_devidx];
+
+			if (rc->rc_error == 0)
+				continue;
+
+			zio_nowait(zio_vdev_child_io(zio, NULL, cvd,
+			    rc->rc_offset, rc->rc_data, rc->rc_size,
+			    ZIO_TYPE_WRITE, zio->io_priority,
+			    ZIO_FLAG_IO_REPAIR | (unexpected_errors ?
+			    ZIO_FLAG_SELF_HEAL : 0), NULL, NULL));
+		}
+	}
+}
+
+static void
+vdev_raidz_state_change(vdev_t *vd, int faulted, int degraded)
+{
+	if (faulted > vd->vdev_nparity)
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
+		    VDEV_AUX_NO_REPLICAS);
+	else if (degraded + faulted != 0)
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, VDEV_AUX_NONE);
+	else
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_HEALTHY, VDEV_AUX_NONE);
+}
+
+vdev_ops_t vdev_raidz_ops = {
+	vdev_raidz_open,
+	vdev_raidz_close,
+	vdev_raidz_asize,
+	vdev_raidz_io_start,
+	vdev_raidz_io_done,
+	vdev_raidz_state_change,
+	NULL,
+	NULL,
+	VDEV_TYPE_RAIDZ,	/* name of this vdev type */
+	B_FALSE			/* not a leaf vdev */
+};
diff --git a/uts/common/fs/zfs/vdev_root.c b/uts/common/fs/zfs/vdev_root.c
new file mode 100644
index 000000000000..879f78f3a5b3
--- /dev/null
+++ b/uts/common/fs/zfs/vdev_root.c
@@ -0,0 +1,116 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/vdev_impl.h>
+#include <sys/zio.h>
+#include <sys/fs/zfs.h>
+
+/*
+ * Virtual device vector for the pool's root vdev.
+ */
+
+/*
+ * We should be able to tolerate one failure with absolutely no damage
+ * to our metadata.  Two failures will take out space maps, a bunch of
+ * indirect block trees, meta dnodes, dnodes, etc.  Probably not a happy
+ * place to live.  When we get smarter, we can liberalize this policy.
+ * e.g. If we haven't lost two consecutive top-level vdevs, then we are
+ * probably fine.  Adding bean counters during alloc/free can make this
+ * future guesswork more accurate.
+ */
+static int
+too_many_errors(vdev_t *vd, int numerrors)
+{
+	ASSERT3U(numerrors, <=, vd->vdev_children);
+	return (numerrors > 0);
+}
+
+static int
+vdev_root_open(vdev_t *vd, uint64_t *asize, uint64_t *ashift)
+{
+	int lasterror = 0;
+	int numerrors = 0;
+
+	if (vd->vdev_children == 0) {
+		vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
+		return (EINVAL);
+	}
+
+	vdev_open_children(vd);
+
+	for (int c = 0; c < vd->vdev_children; c++) {
+		vdev_t *cvd = vd->vdev_child[c];
+
+		if (cvd->vdev_open_error && !cvd->vdev_islog) {
+			lasterror = cvd->vdev_open_error;
+			numerrors++;
+		}
+	}
+
+	if (too_many_errors(vd, numerrors)) {
+		vd->vdev_stat.vs_aux = VDEV_AUX_NO_REPLICAS;
+		return (lasterror);
+	}
+
+	*asize = 0;
+	*ashift = 0;
+
+	return (0);
+}
+
+static void
+vdev_root_close(vdev_t *vd)
+{
+	for (int c = 0; c < vd->vdev_children; c++)
+		vdev_close(vd->vdev_child[c]);
+}
+
+static void
+vdev_root_state_change(vdev_t *vd, int faulted, int degraded)
+{
+	if (too_many_errors(vd, faulted)) {
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
+		    VDEV_AUX_NO_REPLICAS);
+	} else if (degraded) {
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, VDEV_AUX_NONE);
+	} else {
+		vdev_set_state(vd, B_FALSE, VDEV_STATE_HEALTHY, VDEV_AUX_NONE);
+	}
+}
+
+vdev_ops_t vdev_root_ops = {
+	vdev_root_open,
+	vdev_root_close,
+	vdev_default_asize,
+	NULL,			/* io_start - not applicable to the root */
+	NULL,			/* io_done - not applicable to the root */
+	vdev_root_state_change,
+	NULL,
+	NULL,
+	VDEV_TYPE_ROOT,		/* name of this vdev type */
+	B_FALSE			/* not a leaf vdev */
+};
diff --git a/uts/common/fs/zfs/zap.c b/uts/common/fs/zfs/zap.c
new file mode 100644
index 000000000000..288a4d99ab25
--- /dev/null
+++ b/uts/common/fs/zfs/zap.c
@@ -0,0 +1,1354 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * This file contains the top half of the zfs directory structure
+ * implementation. The bottom half is in zap_leaf.c.
+ *
+ * The zdir is an extendable hash data structure. There is a table of
+ * pointers to buckets (zap_t->zd_data->zd_leafs). The buckets are
+ * each a constant size and hold a variable number of directory entries.
+ * The buckets (aka "leaf nodes") are implemented in zap_leaf.c.
+ *
+ * The pointer table holds a power of 2 number of pointers.
+ * (1<<zap_t->zd_data->zd_phys->zd_prefix_len).  The bucket pointed to
+ * by the pointer at index i in the table holds entries whose hash value
+ * has a zd_prefix_len - bit prefix
+ */
+
+#include <sys/spa.h>
+#include <sys/dmu.h>
+#include <sys/zfs_context.h>
+#include <sys/zfs_znode.h>
+#include <sys/fs/zfs.h>
+#include <sys/zap.h>
+#include <sys/refcount.h>
+#include <sys/zap_impl.h>
+#include <sys/zap_leaf.h>
+
+int fzap_default_block_shift = 14; /* 16k blocksize */
+
+static void zap_leaf_pageout(dmu_buf_t *db, void *vl);
+static uint64_t zap_allocate_blocks(zap_t *zap, int nblocks);
+
+
+void
+fzap_byteswap(void *vbuf, size_t size)
+{
+	uint64_t block_type;
+
+	block_type = *(uint64_t *)vbuf;
+
+	if (block_type == ZBT_LEAF || block_type == BSWAP_64(ZBT_LEAF))
+		zap_leaf_byteswap(vbuf, size);
+	else {
+		/* it's a ptrtbl block */
+		byteswap_uint64_array(vbuf, size);
+	}
+}
+
+void
+fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags)
+{
+	dmu_buf_t *db;
+	zap_leaf_t *l;
+	int i;
+	zap_phys_t *zp;
+
+	ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
+	zap->zap_ismicro = FALSE;
+
+	(void) dmu_buf_update_user(zap->zap_dbuf, zap, zap,
+	    &zap->zap_f.zap_phys, zap_evict);
+
+	mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0);
+	zap->zap_f.zap_block_shift = highbit(zap->zap_dbuf->db_size) - 1;
+
+	zp = zap->zap_f.zap_phys;
+	/*
+	 * explicitly zero it since it might be coming from an
+	 * initialized microzap
+	 */
+	bzero(zap->zap_dbuf->db_data, zap->zap_dbuf->db_size);
+	zp->zap_block_type = ZBT_HEADER;
+	zp->zap_magic = ZAP_MAGIC;
+
+	zp->zap_ptrtbl.zt_shift = ZAP_EMBEDDED_PTRTBL_SHIFT(zap);
+
+	zp->zap_freeblk = 2;		/* block 1 will be the first leaf */
+	zp->zap_num_leafs = 1;
+	zp->zap_num_entries = 0;
+	zp->zap_salt = zap->zap_salt;
+	zp->zap_normflags = zap->zap_normflags;
+	zp->zap_flags = flags;
+
+	/* block 1 will be the first leaf */
+	for (i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++)
+		ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1;
+
+	/*
+	 * set up block 1 - the first leaf
+	 */
+	VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object,
+	    1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db, DMU_READ_NO_PREFETCH));
+	dmu_buf_will_dirty(db, tx);
+
+	l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP);
+	l->l_dbuf = db;
+	l->l_phys = db->db_data;
+
+	zap_leaf_init(l, zp->zap_normflags != 0);
+
+	kmem_free(l, sizeof (zap_leaf_t));
+	dmu_buf_rele(db, FTAG);
+}
+
+static int
+zap_tryupgradedir(zap_t *zap, dmu_tx_t *tx)
+{
+	if (RW_WRITE_HELD(&zap->zap_rwlock))
+		return (1);
+	if (rw_tryupgrade(&zap->zap_rwlock)) {
+		dmu_buf_will_dirty(zap->zap_dbuf, tx);
+		return (1);
+	}
+	return (0);
+}
+
+/*
+ * Generic routines for dealing with the pointer & cookie tables.
+ */
+
+static int
+zap_table_grow(zap_t *zap, zap_table_phys_t *tbl,
+    void (*transfer_func)(const uint64_t *src, uint64_t *dst, int n),
+    dmu_tx_t *tx)
+{
+	uint64_t b, newblk;
+	dmu_buf_t *db_old, *db_new;
+	int err;
+	int bs = FZAP_BLOCK_SHIFT(zap);
+	int hepb = 1<<(bs-4);
+	/* hepb = half the number of entries in a block */
+
+	ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
+	ASSERT(tbl->zt_blk != 0);
+	ASSERT(tbl->zt_numblks > 0);
+
+	if (tbl->zt_nextblk != 0) {
+		newblk = tbl->zt_nextblk;
+	} else {
+		newblk = zap_allocate_blocks(zap, tbl->zt_numblks * 2);
+		tbl->zt_nextblk = newblk;
+		ASSERT3U(tbl->zt_blks_copied, ==, 0);
+		dmu_prefetch(zap->zap_objset, zap->zap_object,
+		    tbl->zt_blk << bs, tbl->zt_numblks << bs);
+	}
+
+	/*
+	 * Copy the ptrtbl from the old to new location.
+	 */
+
+	b = tbl->zt_blks_copied;
+	err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
+	    (tbl->zt_blk + b) << bs, FTAG, &db_old, DMU_READ_NO_PREFETCH);
+	if (err)
+		return (err);
+
+	/* first half of entries in old[b] go to new[2*b+0] */
+	VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object,
+	    (newblk + 2*b+0) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH));
+	dmu_buf_will_dirty(db_new, tx);
+	transfer_func(db_old->db_data, db_new->db_data, hepb);
+	dmu_buf_rele(db_new, FTAG);
+
+	/* second half of entries in old[b] go to new[2*b+1] */
+	VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object,
+	    (newblk + 2*b+1) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH));
+	dmu_buf_will_dirty(db_new, tx);
+	transfer_func((uint64_t *)db_old->db_data + hepb,
+	    db_new->db_data, hepb);
+	dmu_buf_rele(db_new, FTAG);
+
+	dmu_buf_rele(db_old, FTAG);
+
+	tbl->zt_blks_copied++;
+
+	dprintf("copied block %llu of %llu\n",
+	    tbl->zt_blks_copied, tbl->zt_numblks);
+
+	if (tbl->zt_blks_copied == tbl->zt_numblks) {
+		(void) dmu_free_range(zap->zap_objset, zap->zap_object,
+		    tbl->zt_blk << bs, tbl->zt_numblks << bs, tx);
+
+		tbl->zt_blk = newblk;
+		tbl->zt_numblks *= 2;
+		tbl->zt_shift++;
+		tbl->zt_nextblk = 0;
+		tbl->zt_blks_copied = 0;
+
+		dprintf("finished; numblocks now %llu (%lluk entries)\n",
+		    tbl->zt_numblks, 1<<(tbl->zt_shift-10));
+	}
+
+	return (0);
+}
+
+static int
+zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val,
+    dmu_tx_t *tx)
+{
+	int err;
+	uint64_t blk, off;
+	int bs = FZAP_BLOCK_SHIFT(zap);
+	dmu_buf_t *db;
+
+	ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
+	ASSERT(tbl->zt_blk != 0);
+
+	dprintf("storing %llx at index %llx\n", val, idx);
+
+	blk = idx >> (bs-3);
+	off = idx & ((1<<(bs-3))-1);
+
+	err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
+	    (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH);
+	if (err)
+		return (err);
+	dmu_buf_will_dirty(db, tx);
+
+	if (tbl->zt_nextblk != 0) {
+		uint64_t idx2 = idx * 2;
+		uint64_t blk2 = idx2 >> (bs-3);
+		uint64_t off2 = idx2 & ((1<<(bs-3))-1);
+		dmu_buf_t *db2;
+
+		err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
+		    (tbl->zt_nextblk + blk2) << bs, FTAG, &db2,
+		    DMU_READ_NO_PREFETCH);
+		if (err) {
+			dmu_buf_rele(db, FTAG);
+			return (err);
+		}
+		dmu_buf_will_dirty(db2, tx);
+		((uint64_t *)db2->db_data)[off2] = val;
+		((uint64_t *)db2->db_data)[off2+1] = val;
+		dmu_buf_rele(db2, FTAG);
+	}
+
+	((uint64_t *)db->db_data)[off] = val;
+	dmu_buf_rele(db, FTAG);
+
+	return (0);
+}
+
+static int
+zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp)
+{
+	uint64_t blk, off;
+	int err;
+	dmu_buf_t *db;
+	int bs = FZAP_BLOCK_SHIFT(zap);
+
+	ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
+
+	blk = idx >> (bs-3);
+	off = idx & ((1<<(bs-3))-1);
+
+	err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
+	    (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH);
+	if (err)
+		return (err);
+	*valp = ((uint64_t *)db->db_data)[off];
+	dmu_buf_rele(db, FTAG);
+
+	if (tbl->zt_nextblk != 0) {
+		/*
+		 * read the nextblk for the sake of i/o error checking,
+		 * so that zap_table_load() will catch errors for
+		 * zap_table_store.
+		 */
+		blk = (idx*2) >> (bs-3);
+
+		err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
+		    (tbl->zt_nextblk + blk) << bs, FTAG, &db,
+		    DMU_READ_NO_PREFETCH);
+		dmu_buf_rele(db, FTAG);
+	}
+	return (err);
+}
+
+/*
+ * Routines for growing the ptrtbl.
+ */
+
+static void
+zap_ptrtbl_transfer(const uint64_t *src, uint64_t *dst, int n)
+{
+	int i;
+	for (i = 0; i < n; i++) {
+		uint64_t lb = src[i];
+		dst[2*i+0] = lb;
+		dst[2*i+1] = lb;
+	}
+}
+
+static int
+zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx)
+{
+	/*
+	 * The pointer table should never use more hash bits than we
+	 * have (otherwise we'd be using useless zero bits to index it).
+	 * If we are within 2 bits of running out, stop growing, since
+	 * this is already an aberrant condition.
+	 */
+	if (zap->zap_f.zap_phys->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2)
+		return (ENOSPC);
+
+	if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) {
+		/*
+		 * We are outgrowing the "embedded" ptrtbl (the one
+		 * stored in the header block).  Give it its own entire
+		 * block, which will double the size of the ptrtbl.
+		 */
+		uint64_t newblk;
+		dmu_buf_t *db_new;
+		int err;
+
+		ASSERT3U(zap->zap_f.zap_phys->zap_ptrtbl.zt_shift, ==,
+		    ZAP_EMBEDDED_PTRTBL_SHIFT(zap));
+		ASSERT3U(zap->zap_f.zap_phys->zap_ptrtbl.zt_blk, ==, 0);
+
+		newblk = zap_allocate_blocks(zap, 1);
+		err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
+		    newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new,
+		    DMU_READ_NO_PREFETCH);
+		if (err)
+			return (err);
+		dmu_buf_will_dirty(db_new, tx);
+		zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0),
+		    db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap));
+		dmu_buf_rele(db_new, FTAG);
+
+		zap->zap_f.zap_phys->zap_ptrtbl.zt_blk = newblk;
+		zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks = 1;
+		zap->zap_f.zap_phys->zap_ptrtbl.zt_shift++;
+
+		ASSERT3U(1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift, ==,
+		    zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks <<
+		    (FZAP_BLOCK_SHIFT(zap)-3));
+
+		return (0);
+	} else {
+		return (zap_table_grow(zap, &zap->zap_f.zap_phys->zap_ptrtbl,
+		    zap_ptrtbl_transfer, tx));
+	}
+}
+
+static void
+zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx)
+{
+	dmu_buf_will_dirty(zap->zap_dbuf, tx);
+	mutex_enter(&zap->zap_f.zap_num_entries_mtx);
+	ASSERT(delta > 0 || zap->zap_f.zap_phys->zap_num_entries >= -delta);
+	zap->zap_f.zap_phys->zap_num_entries += delta;
+	mutex_exit(&zap->zap_f.zap_num_entries_mtx);
+}
+
+static uint64_t
+zap_allocate_blocks(zap_t *zap, int nblocks)
+{
+	uint64_t newblk;
+	ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
+	newblk = zap->zap_f.zap_phys->zap_freeblk;
+	zap->zap_f.zap_phys->zap_freeblk += nblocks;
+	return (newblk);
+}
+
+static zap_leaf_t *
+zap_create_leaf(zap_t *zap, dmu_tx_t *tx)
+{
+	void *winner;
+	zap_leaf_t *l = kmem_alloc(sizeof (zap_leaf_t), KM_SLEEP);
+
+	ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
+
+	rw_init(&l->l_rwlock, 0, 0, 0);
+	rw_enter(&l->l_rwlock, RW_WRITER);
+	l->l_blkid = zap_allocate_blocks(zap, 1);
+	l->l_dbuf = NULL;
+	l->l_phys = NULL;
+
+	VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object,
+	    l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf,
+	    DMU_READ_NO_PREFETCH));
+	winner = dmu_buf_set_user(l->l_dbuf, l, &l->l_phys, zap_leaf_pageout);
+	ASSERT(winner == NULL);
+	dmu_buf_will_dirty(l->l_dbuf, tx);
+
+	zap_leaf_init(l, zap->zap_normflags != 0);
+
+	zap->zap_f.zap_phys->zap_num_leafs++;
+
+	return (l);
+}
+
+int
+fzap_count(zap_t *zap, uint64_t *count)
+{
+	ASSERT(!zap->zap_ismicro);
+	mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */
+	*count = zap->zap_f.zap_phys->zap_num_entries;
+	mutex_exit(&zap->zap_f.zap_num_entries_mtx);
+	return (0);
+}
+
+/*
+ * Routines for obtaining zap_leaf_t's
+ */
+
+void
+zap_put_leaf(zap_leaf_t *l)
+{
+	rw_exit(&l->l_rwlock);
+	dmu_buf_rele(l->l_dbuf, NULL);
+}
+
+_NOTE(ARGSUSED(0))
+static void
+zap_leaf_pageout(dmu_buf_t *db, void *vl)
+{
+	zap_leaf_t *l = vl;
+
+	rw_destroy(&l->l_rwlock);
+	kmem_free(l, sizeof (zap_leaf_t));
+}
+
+static zap_leaf_t *
+zap_open_leaf(uint64_t blkid, dmu_buf_t *db)
+{
+	zap_leaf_t *l, *winner;
+
+	ASSERT(blkid != 0);
+
+	l = kmem_alloc(sizeof (zap_leaf_t), KM_SLEEP);
+	rw_init(&l->l_rwlock, 0, 0, 0);
+	rw_enter(&l->l_rwlock, RW_WRITER);
+	l->l_blkid = blkid;
+	l->l_bs = highbit(db->db_size)-1;
+	l->l_dbuf = db;
+	l->l_phys = NULL;
+
+	winner = dmu_buf_set_user(db, l, &l->l_phys, zap_leaf_pageout);
+
+	rw_exit(&l->l_rwlock);
+	if (winner != NULL) {
+		/* someone else set it first */
+		zap_leaf_pageout(NULL, l);
+		l = winner;
+	}
+
+	/*
+	 * lhr_pad was previously used for the next leaf in the leaf
+	 * chain.  There should be no chained leafs (as we have removed
+	 * support for them).
+	 */
+	ASSERT3U(l->l_phys->l_hdr.lh_pad1, ==, 0);
+
+	/*
+	 * There should be more hash entries than there can be
+	 * chunks to put in the hash table
+	 */
+	ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3);
+
+	/* The chunks should begin at the end of the hash table */
+	ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==,
+	    &l->l_phys->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]);
+
+	/* The chunks should end at the end of the block */
+	ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) -
+	    (uintptr_t)l->l_phys, ==, l->l_dbuf->db_size);
+
+	return (l);
+}
+
+static int
+zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt,
+    zap_leaf_t **lp)
+{
+	dmu_buf_t *db;
+	zap_leaf_t *l;
+	int bs = FZAP_BLOCK_SHIFT(zap);
+	int err;
+
+	ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
+
+	err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
+	    blkid << bs, NULL, &db, DMU_READ_NO_PREFETCH);
+	if (err)
+		return (err);
+
+	ASSERT3U(db->db_object, ==, zap->zap_object);
+	ASSERT3U(db->db_offset, ==, blkid << bs);
+	ASSERT3U(db->db_size, ==, 1 << bs);
+	ASSERT(blkid != 0);
+
+	l = dmu_buf_get_user(db);
+
+	if (l == NULL)
+		l = zap_open_leaf(blkid, db);
+
+	rw_enter(&l->l_rwlock, lt);
+	/*
+	 * Must lock before dirtying, otherwise l->l_phys could change,
+	 * causing ASSERT below to fail.
+	 */
+	if (lt == RW_WRITER)
+		dmu_buf_will_dirty(db, tx);
+	ASSERT3U(l->l_blkid, ==, blkid);
+	ASSERT3P(l->l_dbuf, ==, db);
+	ASSERT3P(l->l_phys, ==, l->l_dbuf->db_data);
+	ASSERT3U(l->l_phys->l_hdr.lh_block_type, ==, ZBT_LEAF);
+	ASSERT3U(l->l_phys->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC);
+
+	*lp = l;
+	return (0);
+}
+
+static int
+zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp)
+{
+	ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
+
+	if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) {
+		ASSERT3U(idx, <,
+		    (1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift));
+		*valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx);
+		return (0);
+	} else {
+		return (zap_table_load(zap, &zap->zap_f.zap_phys->zap_ptrtbl,
+		    idx, valp));
+	}
+}
+
+static int
+zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx)
+{
+	ASSERT(tx != NULL);
+	ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
+
+	if (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk == 0) {
+		ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk;
+		return (0);
+	} else {
+		return (zap_table_store(zap, &zap->zap_f.zap_phys->zap_ptrtbl,
+		    idx, blk, tx));
+	}
+}
+
+static int
+zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp)
+{
+	uint64_t idx, blk;
+	int err;
+
+	ASSERT(zap->zap_dbuf == NULL ||
+	    zap->zap_f.zap_phys == zap->zap_dbuf->db_data);
+	ASSERT3U(zap->zap_f.zap_phys->zap_magic, ==, ZAP_MAGIC);
+	idx = ZAP_HASH_IDX(h, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift);
+	err = zap_idx_to_blk(zap, idx, &blk);
+	if (err != 0)
+		return (err);
+	err = zap_get_leaf_byblk(zap, blk, tx, lt, lp);
+
+	ASSERT(err || ZAP_HASH_IDX(h, (*lp)->l_phys->l_hdr.lh_prefix_len) ==
+	    (*lp)->l_phys->l_hdr.lh_prefix);
+	return (err);
+}
+
+static int
+zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx, zap_leaf_t **lp)
+{
+	zap_t *zap = zn->zn_zap;
+	uint64_t hash = zn->zn_hash;
+	zap_leaf_t *nl;
+	int prefix_diff, i, err;
+	uint64_t sibling;
+	int old_prefix_len = l->l_phys->l_hdr.lh_prefix_len;
+
+	ASSERT3U(old_prefix_len, <=, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift);
+	ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
+
+	ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==,
+	    l->l_phys->l_hdr.lh_prefix);
+
+	if (zap_tryupgradedir(zap, tx) == 0 ||
+	    old_prefix_len == zap->zap_f.zap_phys->zap_ptrtbl.zt_shift) {
+		/* We failed to upgrade, or need to grow the pointer table */
+		objset_t *os = zap->zap_objset;
+		uint64_t object = zap->zap_object;
+
+		zap_put_leaf(l);
+		zap_unlockdir(zap);
+		err = zap_lockdir(os, object, tx, RW_WRITER,
+		    FALSE, FALSE, &zn->zn_zap);
+		zap = zn->zn_zap;
+		if (err)
+			return (err);
+		ASSERT(!zap->zap_ismicro);
+
+		while (old_prefix_len ==
+		    zap->zap_f.zap_phys->zap_ptrtbl.zt_shift) {
+			err = zap_grow_ptrtbl(zap, tx);
+			if (err)
+				return (err);
+		}
+
+		err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l);
+		if (err)
+			return (err);
+
+		if (l->l_phys->l_hdr.lh_prefix_len != old_prefix_len) {
+			/* it split while our locks were down */
+			*lp = l;
+			return (0);
+		}
+	}
+	ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
+	ASSERT3U(old_prefix_len, <, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift);
+	ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==,
+	    l->l_phys->l_hdr.lh_prefix);
+
+	prefix_diff = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift -
+	    (old_prefix_len + 1);
+	sibling = (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff;
+
+	/* check for i/o errors before doing zap_leaf_split */
+	for (i = 0; i < (1ULL<<prefix_diff); i++) {
+		uint64_t blk;
+		err = zap_idx_to_blk(zap, sibling+i, &blk);
+		if (err)
+			return (err);
+		ASSERT3U(blk, ==, l->l_blkid);
+	}
+
+	nl = zap_create_leaf(zap, tx);
+	zap_leaf_split(l, nl, zap->zap_normflags != 0);
+
+	/* set sibling pointers */
+	for (i = 0; i < (1ULL<<prefix_diff); i++) {
+		err = zap_set_idx_to_blk(zap, sibling+i, nl->l_blkid, tx);
+		ASSERT3U(err, ==, 0); /* we checked for i/o errors above */
+	}
+
+	if (hash & (1ULL << (64 - l->l_phys->l_hdr.lh_prefix_len))) {
+		/* we want the sibling */
+		zap_put_leaf(l);
+		*lp = nl;
+	} else {
+		zap_put_leaf(nl);
+		*lp = l;
+	}
+
+	return (0);
+}
+
+static void
+zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx)
+{
+	zap_t *zap = zn->zn_zap;
+	int shift = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift;
+	int leaffull = (l->l_phys->l_hdr.lh_prefix_len == shift &&
+	    l->l_phys->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER);
+
+	zap_put_leaf(l);
+
+	if (leaffull || zap->zap_f.zap_phys->zap_ptrtbl.zt_nextblk) {
+		int err;
+
+		/*
+		 * We are in the middle of growing the pointer table, or
+		 * this leaf will soon make us grow it.
+		 */
+		if (zap_tryupgradedir(zap, tx) == 0) {
+			objset_t *os = zap->zap_objset;
+			uint64_t zapobj = zap->zap_object;
+
+			zap_unlockdir(zap);
+			err = zap_lockdir(os, zapobj, tx,
+			    RW_WRITER, FALSE, FALSE, &zn->zn_zap);
+			zap = zn->zn_zap;
+			if (err)
+				return;
+		}
+
+		/* could have finished growing while our locks were down */
+		if (zap->zap_f.zap_phys->zap_ptrtbl.zt_shift == shift)
+			(void) zap_grow_ptrtbl(zap, tx);
+	}
+}
+
+static int
+fzap_checkname(zap_name_t *zn)
+{
+	if (zn->zn_key_orig_numints * zn->zn_key_intlen > ZAP_MAXNAMELEN)
+		return (ENAMETOOLONG);
+	return (0);
+}
+
+static int
+fzap_checksize(uint64_t integer_size, uint64_t num_integers)
+{
+	/* Only integer sizes supported by C */
+	switch (integer_size) {
+	case 1:
+	case 2:
+	case 4:
+	case 8:
+		break;
+	default:
+		return (EINVAL);
+	}
+
+	if (integer_size * num_integers > ZAP_MAXVALUELEN)
+		return (E2BIG);
+
+	return (0);
+}
+
+static int
+fzap_check(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers)
+{
+	int err;
+
+	if ((err = fzap_checkname(zn)) != 0)
+		return (err);
+	return (fzap_checksize(integer_size, num_integers));
+}
+
+/*
+ * Routines for manipulating attributes.
+ */
+int
+fzap_lookup(zap_name_t *zn,
+    uint64_t integer_size, uint64_t num_integers, void *buf,
+    char *realname, int rn_len, boolean_t *ncp)
+{
+	zap_leaf_t *l;
+	int err;
+	zap_entry_handle_t zeh;
+
+	if ((err = fzap_checkname(zn)) != 0)
+		return (err);
+
+	err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l);
+	if (err != 0)
+		return (err);
+	err = zap_leaf_lookup(l, zn, &zeh);
+	if (err == 0) {
+		if ((err = fzap_checksize(integer_size, num_integers)) != 0) {
+			zap_put_leaf(l);
+			return (err);
+		}
+
+		err = zap_entry_read(&zeh, integer_size, num_integers, buf);
+		(void) zap_entry_read_name(zn->zn_zap, &zeh, rn_len, realname);
+		if (ncp) {
+			*ncp = zap_entry_normalization_conflict(&zeh,
+			    zn, NULL, zn->zn_zap);
+		}
+	}
+
+	zap_put_leaf(l);
+	return (err);
+}
+
+int
+fzap_add_cd(zap_name_t *zn,
+    uint64_t integer_size, uint64_t num_integers,
+    const void *val, uint32_t cd, dmu_tx_t *tx)
+{
+	zap_leaf_t *l;
+	int err;
+	zap_entry_handle_t zeh;
+	zap_t *zap = zn->zn_zap;
+
+	ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
+	ASSERT(!zap->zap_ismicro);
+	ASSERT(fzap_check(zn, integer_size, num_integers) == 0);
+
+	err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l);
+	if (err != 0)
+		return (err);
+retry:
+	err = zap_leaf_lookup(l, zn, &zeh);
+	if (err == 0) {
+		err = EEXIST;
+		goto out;
+	}
+	if (err != ENOENT)
+		goto out;
+
+	err = zap_entry_create(l, zn, cd,
+	    integer_size, num_integers, val, &zeh);
+
+	if (err == 0) {
+		zap_increment_num_entries(zap, 1, tx);
+	} else if (err == EAGAIN) {
+		err = zap_expand_leaf(zn, l, tx, &l);
+		zap = zn->zn_zap;	/* zap_expand_leaf() may change zap */
+		if (err == 0)
+			goto retry;
+	}
+
+out:
+	if (zap != NULL)
+		zap_put_leaf_maybe_grow_ptrtbl(zn, l, tx);
+	return (err);
+}
+
+int
+fzap_add(zap_name_t *zn,
+    uint64_t integer_size, uint64_t num_integers,
+    const void *val, dmu_tx_t *tx)
+{
+	int err = fzap_check(zn, integer_size, num_integers);
+	if (err != 0)
+		return (err);
+
+	return (fzap_add_cd(zn, integer_size, num_integers,
+	    val, ZAP_NEED_CD, tx));
+}
+
+int
+fzap_update(zap_name_t *zn,
+    int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx)
+{
+	zap_leaf_t *l;
+	int err, create;
+	zap_entry_handle_t zeh;
+	zap_t *zap = zn->zn_zap;
+
+	ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
+	err = fzap_check(zn, integer_size, num_integers);
+	if (err != 0)
+		return (err);
+
+	err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l);
+	if (err != 0)
+		return (err);
+retry:
+	err = zap_leaf_lookup(l, zn, &zeh);
+	create = (err == ENOENT);
+	ASSERT(err == 0 || err == ENOENT);
+
+	if (create) {
+		err = zap_entry_create(l, zn, ZAP_NEED_CD,
+		    integer_size, num_integers, val, &zeh);
+		if (err == 0)
+			zap_increment_num_entries(zap, 1, tx);
+	} else {
+		err = zap_entry_update(&zeh, integer_size, num_integers, val);
+	}
+
+	if (err == EAGAIN) {
+		err = zap_expand_leaf(zn, l, tx, &l);
+		zap = zn->zn_zap;	/* zap_expand_leaf() may change zap */
+		if (err == 0)
+			goto retry;
+	}
+
+	if (zap != NULL)
+		zap_put_leaf_maybe_grow_ptrtbl(zn, l, tx);
+	return (err);
+}
+
+int
+fzap_length(zap_name_t *zn,
+    uint64_t *integer_size, uint64_t *num_integers)
+{
+	zap_leaf_t *l;
+	int err;
+	zap_entry_handle_t zeh;
+
+	err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l);
+	if (err != 0)
+		return (err);
+	err = zap_leaf_lookup(l, zn, &zeh);
+	if (err != 0)
+		goto out;
+
+	if (integer_size)
+		*integer_size = zeh.zeh_integer_size;
+	if (num_integers)
+		*num_integers = zeh.zeh_num_integers;
+out:
+	zap_put_leaf(l);
+	return (err);
+}
+
+int
+fzap_remove(zap_name_t *zn, dmu_tx_t *tx)
+{
+	zap_leaf_t *l;
+	int err;
+	zap_entry_handle_t zeh;
+
+	err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, tx, RW_WRITER, &l);
+	if (err != 0)
+		return (err);
+	err = zap_leaf_lookup(l, zn, &zeh);
+	if (err == 0) {
+		zap_entry_remove(&zeh);
+		zap_increment_num_entries(zn->zn_zap, -1, tx);
+	}
+	zap_put_leaf(l);
+	return (err);
+}
+
+void
+fzap_prefetch(zap_name_t *zn)
+{
+	uint64_t idx, blk;
+	zap_t *zap = zn->zn_zap;
+	int bs;
+
+	idx = ZAP_HASH_IDX(zn->zn_hash,
+	    zap->zap_f.zap_phys->zap_ptrtbl.zt_shift);
+	if (zap_idx_to_blk(zap, idx, &blk) != 0)
+		return;
+	bs = FZAP_BLOCK_SHIFT(zap);
+	dmu_prefetch(zap->zap_objset, zap->zap_object, blk << bs, 1 << bs);
+}
+
+/*
+ * Helper functions for consumers.
+ */
+
+int
+zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask,
+    char *name)
+{
+	zap_cursor_t zc;
+	zap_attribute_t *za;
+	int err;
+
+	if (mask == 0)
+		mask = -1ULL;
+
+	za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
+	for (zap_cursor_init(&zc, os, zapobj);
+	    (err = zap_cursor_retrieve(&zc, za)) == 0;
+	    zap_cursor_advance(&zc)) {
+		if ((za->za_first_integer & mask) == (value & mask)) {
+			(void) strcpy(name, za->za_name);
+			break;
+		}
+	}
+	zap_cursor_fini(&zc);
+	kmem_free(za, sizeof (zap_attribute_t));
+	return (err);
+}
+
+int
+zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx)
+{
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	int err;
+
+	for (zap_cursor_init(&zc, os, fromobj);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    (void) zap_cursor_advance(&zc)) {
+		if (za.za_integer_length != 8 || za.za_num_integers != 1)
+			return (EINVAL);
+		err = zap_add(os, intoobj, za.za_name,
+		    8, 1, &za.za_first_integer, tx);
+		if (err)
+			return (err);
+	}
+	zap_cursor_fini(&zc);
+	return (0);
+}
+
+int
+zap_join_key(objset_t *os, uint64_t fromobj, uint64_t intoobj,
+    uint64_t value, dmu_tx_t *tx)
+{
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	int err;
+
+	for (zap_cursor_init(&zc, os, fromobj);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    (void) zap_cursor_advance(&zc)) {
+		if (za.za_integer_length != 8 || za.za_num_integers != 1)
+			return (EINVAL);
+		err = zap_add(os, intoobj, za.za_name,
+		    8, 1, &value, tx);
+		if (err)
+			return (err);
+	}
+	zap_cursor_fini(&zc);
+	return (0);
+}
+
+int
+zap_join_increment(objset_t *os, uint64_t fromobj, uint64_t intoobj,
+    dmu_tx_t *tx)
+{
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	int err;
+
+	for (zap_cursor_init(&zc, os, fromobj);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    (void) zap_cursor_advance(&zc)) {
+		uint64_t delta = 0;
+
+		if (za.za_integer_length != 8 || za.za_num_integers != 1)
+			return (EINVAL);
+
+		err = zap_lookup(os, intoobj, za.za_name, 8, 1, &delta);
+		if (err != 0 && err != ENOENT)
+			return (err);
+		delta += za.za_first_integer;
+		err = zap_update(os, intoobj, za.za_name, 8, 1, &delta, tx);
+		if (err)
+			return (err);
+	}
+	zap_cursor_fini(&zc);
+	return (0);
+}
+
+int
+zap_add_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx)
+{
+	char name[20];
+
+	(void) snprintf(name, sizeof (name), "%llx", (longlong_t)value);
+	return (zap_add(os, obj, name, 8, 1, &value, tx));
+}
+
+int
+zap_remove_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx)
+{
+	char name[20];
+
+	(void) snprintf(name, sizeof (name), "%llx", (longlong_t)value);
+	return (zap_remove(os, obj, name, tx));
+}
+
+int
+zap_lookup_int(objset_t *os, uint64_t obj, uint64_t value)
+{
+	char name[20];
+
+	(void) snprintf(name, sizeof (name), "%llx", (longlong_t)value);
+	return (zap_lookup(os, obj, name, 8, 1, &value));
+}
+
+int
+zap_add_int_key(objset_t *os, uint64_t obj,
+    uint64_t key, uint64_t value, dmu_tx_t *tx)
+{
+	char name[20];
+
+	(void) snprintf(name, sizeof (name), "%llx", (longlong_t)key);
+	return (zap_add(os, obj, name, 8, 1, &value, tx));
+}
+
+int
+zap_lookup_int_key(objset_t *os, uint64_t obj, uint64_t key, uint64_t *valuep)
+{
+	char name[20];
+
+	(void) snprintf(name, sizeof (name), "%llx", (longlong_t)key);
+	return (zap_lookup(os, obj, name, 8, 1, valuep));
+}
+
+int
+zap_increment(objset_t *os, uint64_t obj, const char *name, int64_t delta,
+    dmu_tx_t *tx)
+{
+	uint64_t value = 0;
+	int err;
+
+	if (delta == 0)
+		return (0);
+
+	err = zap_lookup(os, obj, name, 8, 1, &value);
+	if (err != 0 && err != ENOENT)
+		return (err);
+	value += delta;
+	if (value == 0)
+		err = zap_remove(os, obj, name, tx);
+	else
+		err = zap_update(os, obj, name, 8, 1, &value, tx);
+	return (err);
+}
+
+int
+zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta,
+    dmu_tx_t *tx)
+{
+	char name[20];
+
+	(void) snprintf(name, sizeof (name), "%llx", (longlong_t)key);
+	return (zap_increment(os, obj, name, delta, tx));
+}
+
+/*
+ * Routines for iterating over the attributes.
+ */
+
+int
+fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za)
+{
+	int err = ENOENT;
+	zap_entry_handle_t zeh;
+	zap_leaf_t *l;
+
+	/* retrieve the next entry at or after zc_hash/zc_cd */
+	/* if no entry, return ENOENT */
+
+	if (zc->zc_leaf &&
+	    (ZAP_HASH_IDX(zc->zc_hash,
+	    zc->zc_leaf->l_phys->l_hdr.lh_prefix_len) !=
+	    zc->zc_leaf->l_phys->l_hdr.lh_prefix)) {
+		rw_enter(&zc->zc_leaf->l_rwlock, RW_READER);
+		zap_put_leaf(zc->zc_leaf);
+		zc->zc_leaf = NULL;
+	}
+
+again:
+	if (zc->zc_leaf == NULL) {
+		err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER,
+		    &zc->zc_leaf);
+		if (err != 0)
+			return (err);
+	} else {
+		rw_enter(&zc->zc_leaf->l_rwlock, RW_READER);
+	}
+	l = zc->zc_leaf;
+
+	err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh);
+
+	if (err == ENOENT) {
+		uint64_t nocare =
+		    (1ULL << (64 - l->l_phys->l_hdr.lh_prefix_len)) - 1;
+		zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1;
+		zc->zc_cd = 0;
+		if (l->l_phys->l_hdr.lh_prefix_len == 0 || zc->zc_hash == 0) {
+			zc->zc_hash = -1ULL;
+		} else {
+			zap_put_leaf(zc->zc_leaf);
+			zc->zc_leaf = NULL;
+			goto again;
+		}
+	}
+
+	if (err == 0) {
+		zc->zc_hash = zeh.zeh_hash;
+		zc->zc_cd = zeh.zeh_cd;
+		za->za_integer_length = zeh.zeh_integer_size;
+		za->za_num_integers = zeh.zeh_num_integers;
+		if (zeh.zeh_num_integers == 0) {
+			za->za_first_integer = 0;
+		} else {
+			err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer);
+			ASSERT(err == 0 || err == EOVERFLOW);
+		}
+		err = zap_entry_read_name(zap, &zeh,
+		    sizeof (za->za_name), za->za_name);
+		ASSERT(err == 0);
+
+		za->za_normalization_conflict =
+		    zap_entry_normalization_conflict(&zeh,
+		    NULL, za->za_name, zap);
+	}
+	rw_exit(&zc->zc_leaf->l_rwlock);
+	return (err);
+}
+
+static void
+zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs)
+{
+	int i, err;
+	uint64_t lastblk = 0;
+
+	/*
+	 * NB: if a leaf has more pointers than an entire ptrtbl block
+	 * can hold, then it'll be accounted for more than once, since
+	 * we won't have lastblk.
+	 */
+	for (i = 0; i < len; i++) {
+		zap_leaf_t *l;
+
+		if (tbl[i] == lastblk)
+			continue;
+		lastblk = tbl[i];
+
+		err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l);
+		if (err == 0) {
+			zap_leaf_stats(zap, l, zs);
+			zap_put_leaf(l);
+		}
+	}
+}
+
+int
+fzap_cursor_move_to_key(zap_cursor_t *zc, zap_name_t *zn)
+{
+	int err;
+	zap_leaf_t *l;
+	zap_entry_handle_t zeh;
+
+	if (zn->zn_key_orig_numints * zn->zn_key_intlen > ZAP_MAXNAMELEN)
+		return (ENAMETOOLONG);
+
+	err = zap_deref_leaf(zc->zc_zap, zn->zn_hash, NULL, RW_READER, &l);
+	if (err != 0)
+		return (err);
+
+	err = zap_leaf_lookup(l, zn, &zeh);
+	if (err != 0)
+		return (err);
+
+	zc->zc_leaf = l;
+	zc->zc_hash = zeh.zeh_hash;
+	zc->zc_cd = zeh.zeh_cd;
+
+	return (err);
+}
+
+void
+fzap_get_stats(zap_t *zap, zap_stats_t *zs)
+{
+	int bs = FZAP_BLOCK_SHIFT(zap);
+	zs->zs_blocksize = 1ULL << bs;
+
+	/*
+	 * Set zap_phys_t fields
+	 */
+	zs->zs_num_leafs = zap->zap_f.zap_phys->zap_num_leafs;
+	zs->zs_num_entries = zap->zap_f.zap_phys->zap_num_entries;
+	zs->zs_num_blocks = zap->zap_f.zap_phys->zap_freeblk;
+	zs->zs_block_type = zap->zap_f.zap_phys->zap_block_type;
+	zs->zs_magic = zap->zap_f.zap_phys->zap_magic;
+	zs->zs_salt = zap->zap_f.zap_phys->zap_salt;
+
+	/*
+	 * Set zap_ptrtbl fields
+	 */
+	zs->zs_ptrtbl_len = 1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift;
+	zs->zs_ptrtbl_nextblk = zap->zap_f.zap_phys->zap_ptrtbl.zt_nextblk;
+	zs->zs_ptrtbl_blks_copied =
+	    zap->zap_f.zap_phys->zap_ptrtbl.zt_blks_copied;
+	zs->zs_ptrtbl_zt_blk = zap->zap_f.zap_phys->zap_ptrtbl.zt_blk;
+	zs->zs_ptrtbl_zt_numblks = zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks;
+	zs->zs_ptrtbl_zt_shift = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift;
+
+	if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) {
+		/* the ptrtbl is entirely in the header block. */
+		zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0),
+		    1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs);
+	} else {
+		int b;
+
+		dmu_prefetch(zap->zap_objset, zap->zap_object,
+		    zap->zap_f.zap_phys->zap_ptrtbl.zt_blk << bs,
+		    zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks << bs);
+
+		for (b = 0; b < zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks;
+		    b++) {
+			dmu_buf_t *db;
+			int err;
+
+			err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
+			    (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk + b) << bs,
+			    FTAG, &db, DMU_READ_NO_PREFETCH);
+			if (err == 0) {
+				zap_stats_ptrtbl(zap, db->db_data,
+				    1<<(bs-3), zs);
+				dmu_buf_rele(db, FTAG);
+			}
+		}
+	}
+}
+
+int
+fzap_count_write(zap_name_t *zn, int add, uint64_t *towrite,
+    uint64_t *tooverwrite)
+{
+	zap_t *zap = zn->zn_zap;
+	zap_leaf_t *l;
+	int err;
+
+	/*
+	 * Account for the header block of the fatzap.
+	 */
+	if (!add && dmu_buf_freeable(zap->zap_dbuf)) {
+		*tooverwrite += zap->zap_dbuf->db_size;
+	} else {
+		*towrite += zap->zap_dbuf->db_size;
+	}
+
+	/*
+	 * Account for the pointer table blocks.
+	 * If we are adding we need to account for the following cases :
+	 * - If the pointer table is embedded, this operation could force an
+	 *   external pointer table.
+	 * - If this already has an external pointer table this operation
+	 *   could extend the table.
+	 */
+	if (add) {
+		if (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk == 0)
+			*towrite += zap->zap_dbuf->db_size;
+		else
+			*towrite += (zap->zap_dbuf->db_size * 3);
+	}
+
+	/*
+	 * Now, check if the block containing leaf is freeable
+	 * and account accordingly.
+	 */
+	err = zap_deref_leaf(zap, zn->zn_hash, NULL, RW_READER, &l);
+	if (err != 0) {
+		return (err);
+	}
+
+	if (!add && dmu_buf_freeable(l->l_dbuf)) {
+		*tooverwrite += l->l_dbuf->db_size;
+	} else {
+		/*
+		 * If this an add operation, the leaf block could split.
+		 * Hence, we need to account for an additional leaf block.
+		 */
+		*towrite += (add ? 2 : 1) * l->l_dbuf->db_size;
+	}
+
+	zap_put_leaf(l);
+	return (0);
+}
diff --git a/uts/common/fs/zfs/zap_leaf.c b/uts/common/fs/zfs/zap_leaf.c
new file mode 100644
index 000000000000..19a795db825b
--- /dev/null
+++ b/uts/common/fs/zfs/zap_leaf.c
@@ -0,0 +1,872 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * The 512-byte leaf is broken into 32 16-byte chunks.
+ * chunk number n means l_chunk[n], even though the header precedes it.
+ * the names are stored null-terminated.
+ */
+
+#include <sys/zio.h>
+#include <sys/spa.h>
+#include <sys/dmu.h>
+#include <sys/zfs_context.h>
+#include <sys/fs/zfs.h>
+#include <sys/zap.h>
+#include <sys/zap_impl.h>
+#include <sys/zap_leaf.h>
+#include <sys/arc.h>
+
+static uint16_t *zap_leaf_rehash_entry(zap_leaf_t *l, uint16_t entry);
+
+#define	CHAIN_END 0xffff /* end of the chunk chain */
+
+/* half the (current) minimum block size */
+#define	MAX_ARRAY_BYTES (8<<10)
+
+#define	LEAF_HASH(l, h) \
+	((ZAP_LEAF_HASH_NUMENTRIES(l)-1) & \
+	((h) >> (64 - ZAP_LEAF_HASH_SHIFT(l)-(l)->l_phys->l_hdr.lh_prefix_len)))
+
+#define	LEAF_HASH_ENTPTR(l, h) (&(l)->l_phys->l_hash[LEAF_HASH(l, h)])
+
+
+static void
+zap_memset(void *a, int c, size_t n)
+{
+	char *cp = a;
+	char *cpend = cp + n;
+
+	while (cp < cpend)
+		*cp++ = c;
+}
+
+static void
+stv(int len, void *addr, uint64_t value)
+{
+	switch (len) {
+	case 1:
+		*(uint8_t *)addr = value;
+		return;
+	case 2:
+		*(uint16_t *)addr = value;
+		return;
+	case 4:
+		*(uint32_t *)addr = value;
+		return;
+	case 8:
+		*(uint64_t *)addr = value;
+		return;
+	}
+	ASSERT(!"bad int len");
+}
+
+static uint64_t
+ldv(int len, const void *addr)
+{
+	switch (len) {
+	case 1:
+		return (*(uint8_t *)addr);
+	case 2:
+		return (*(uint16_t *)addr);
+	case 4:
+		return (*(uint32_t *)addr);
+	case 8:
+		return (*(uint64_t *)addr);
+	}
+	ASSERT(!"bad int len");
+	return (0xFEEDFACEDEADBEEFULL);
+}
+
+void
+zap_leaf_byteswap(zap_leaf_phys_t *buf, int size)
+{
+	int i;
+	zap_leaf_t l;
+	l.l_bs = highbit(size)-1;
+	l.l_phys = buf;
+
+	buf->l_hdr.lh_block_type = 	BSWAP_64(buf->l_hdr.lh_block_type);
+	buf->l_hdr.lh_prefix = 		BSWAP_64(buf->l_hdr.lh_prefix);
+	buf->l_hdr.lh_magic = 		BSWAP_32(buf->l_hdr.lh_magic);
+	buf->l_hdr.lh_nfree = 		BSWAP_16(buf->l_hdr.lh_nfree);
+	buf->l_hdr.lh_nentries = 	BSWAP_16(buf->l_hdr.lh_nentries);
+	buf->l_hdr.lh_prefix_len = 	BSWAP_16(buf->l_hdr.lh_prefix_len);
+	buf->l_hdr.lh_freelist = 	BSWAP_16(buf->l_hdr.lh_freelist);
+
+	for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++)
+		buf->l_hash[i] = BSWAP_16(buf->l_hash[i]);
+
+	for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) {
+		zap_leaf_chunk_t *lc = &ZAP_LEAF_CHUNK(&l, i);
+		struct zap_leaf_entry *le;
+
+		switch (lc->l_free.lf_type) {
+		case ZAP_CHUNK_ENTRY:
+			le = &lc->l_entry;
+
+			le->le_type =		BSWAP_8(le->le_type);
+			le->le_value_intlen =	BSWAP_8(le->le_value_intlen);
+			le->le_next =		BSWAP_16(le->le_next);
+			le->le_name_chunk =	BSWAP_16(le->le_name_chunk);
+			le->le_name_numints =	BSWAP_16(le->le_name_numints);
+			le->le_value_chunk =	BSWAP_16(le->le_value_chunk);
+			le->le_value_numints =	BSWAP_16(le->le_value_numints);
+			le->le_cd =		BSWAP_32(le->le_cd);
+			le->le_hash =		BSWAP_64(le->le_hash);
+			break;
+		case ZAP_CHUNK_FREE:
+			lc->l_free.lf_type =	BSWAP_8(lc->l_free.lf_type);
+			lc->l_free.lf_next =	BSWAP_16(lc->l_free.lf_next);
+			break;
+		case ZAP_CHUNK_ARRAY:
+			lc->l_array.la_type =	BSWAP_8(lc->l_array.la_type);
+			lc->l_array.la_next =	BSWAP_16(lc->l_array.la_next);
+			/* la_array doesn't need swapping */
+			break;
+		default:
+			ASSERT(!"bad leaf type");
+		}
+	}
+}
+
+void
+zap_leaf_init(zap_leaf_t *l, boolean_t sort)
+{
+	int i;
+
+	l->l_bs = highbit(l->l_dbuf->db_size)-1;
+	zap_memset(&l->l_phys->l_hdr, 0, sizeof (struct zap_leaf_header));
+	zap_memset(l->l_phys->l_hash, CHAIN_END, 2*ZAP_LEAF_HASH_NUMENTRIES(l));
+	for (i = 0; i < ZAP_LEAF_NUMCHUNKS(l); i++) {
+		ZAP_LEAF_CHUNK(l, i).l_free.lf_type = ZAP_CHUNK_FREE;
+		ZAP_LEAF_CHUNK(l, i).l_free.lf_next = i+1;
+	}
+	ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)-1).l_free.lf_next = CHAIN_END;
+	l->l_phys->l_hdr.lh_block_type = ZBT_LEAF;
+	l->l_phys->l_hdr.lh_magic = ZAP_LEAF_MAGIC;
+	l->l_phys->l_hdr.lh_nfree = ZAP_LEAF_NUMCHUNKS(l);
+	if (sort)
+		l->l_phys->l_hdr.lh_flags |= ZLF_ENTRIES_CDSORTED;
+}
+
+/*
+ * Routines which manipulate leaf chunks (l_chunk[]).
+ */
+
+static uint16_t
+zap_leaf_chunk_alloc(zap_leaf_t *l)
+{
+	int chunk;
+
+	ASSERT(l->l_phys->l_hdr.lh_nfree > 0);
+
+	chunk = l->l_phys->l_hdr.lh_freelist;
+	ASSERT3U(chunk, <, ZAP_LEAF_NUMCHUNKS(l));
+	ASSERT3U(ZAP_LEAF_CHUNK(l, chunk).l_free.lf_type, ==, ZAP_CHUNK_FREE);
+
+	l->l_phys->l_hdr.lh_freelist = ZAP_LEAF_CHUNK(l, chunk).l_free.lf_next;
+
+	l->l_phys->l_hdr.lh_nfree--;
+
+	return (chunk);
+}
+
+static void
+zap_leaf_chunk_free(zap_leaf_t *l, uint16_t chunk)
+{
+	struct zap_leaf_free *zlf = &ZAP_LEAF_CHUNK(l, chunk).l_free;
+	ASSERT3U(l->l_phys->l_hdr.lh_nfree, <, ZAP_LEAF_NUMCHUNKS(l));
+	ASSERT3U(chunk, <, ZAP_LEAF_NUMCHUNKS(l));
+	ASSERT(zlf->lf_type != ZAP_CHUNK_FREE);
+
+	zlf->lf_type = ZAP_CHUNK_FREE;
+	zlf->lf_next = l->l_phys->l_hdr.lh_freelist;
+	bzero(zlf->lf_pad, sizeof (zlf->lf_pad)); /* help it to compress */
+	l->l_phys->l_hdr.lh_freelist = chunk;
+
+	l->l_phys->l_hdr.lh_nfree++;
+}
+
+/*
+ * Routines which manipulate leaf arrays (zap_leaf_array type chunks).
+ */
+
+static uint16_t
+zap_leaf_array_create(zap_leaf_t *l, const char *buf,
+    int integer_size, int num_integers)
+{
+	uint16_t chunk_head;
+	uint16_t *chunkp = &chunk_head;
+	int byten = 0;
+	uint64_t value;
+	int shift = (integer_size-1)*8;
+	int len = num_integers;
+
+	ASSERT3U(num_integers * integer_size, <, MAX_ARRAY_BYTES);
+
+	while (len > 0) {
+		uint16_t chunk = zap_leaf_chunk_alloc(l);
+		struct zap_leaf_array *la = &ZAP_LEAF_CHUNK(l, chunk).l_array;
+		int i;
+
+		la->la_type = ZAP_CHUNK_ARRAY;
+		for (i = 0; i < ZAP_LEAF_ARRAY_BYTES; i++) {
+			if (byten == 0)
+				value = ldv(integer_size, buf);
+			la->la_array[i] = value >> shift;
+			value <<= 8;
+			if (++byten == integer_size) {
+				byten = 0;
+				buf += integer_size;
+				if (--len == 0)
+					break;
+			}
+		}
+
+		*chunkp = chunk;
+		chunkp = &la->la_next;
+	}
+	*chunkp = CHAIN_END;
+
+	return (chunk_head);
+}
+
+static void
+zap_leaf_array_free(zap_leaf_t *l, uint16_t *chunkp)
+{
+	uint16_t chunk = *chunkp;
+
+	*chunkp = CHAIN_END;
+
+	while (chunk != CHAIN_END) {
+		int nextchunk = ZAP_LEAF_CHUNK(l, chunk).l_array.la_next;
+		ASSERT3U(ZAP_LEAF_CHUNK(l, chunk).l_array.la_type, ==,
+		    ZAP_CHUNK_ARRAY);
+		zap_leaf_chunk_free(l, chunk);
+		chunk = nextchunk;
+	}
+}
+
+/* array_len and buf_len are in integers, not bytes */
+static void
+zap_leaf_array_read(zap_leaf_t *l, uint16_t chunk,
+    int array_int_len, int array_len, int buf_int_len, uint64_t buf_len,
+    void *buf)
+{
+	int len = MIN(array_len, buf_len);
+	int byten = 0;
+	uint64_t value = 0;
+	char *p = buf;
+
+	ASSERT3U(array_int_len, <=, buf_int_len);
+
+	/* Fast path for one 8-byte integer */
+	if (array_int_len == 8 && buf_int_len == 8 && len == 1) {
+		struct zap_leaf_array *la = &ZAP_LEAF_CHUNK(l, chunk).l_array;
+		uint8_t *ip = la->la_array;
+		uint64_t *buf64 = buf;
+
+		*buf64 = (uint64_t)ip[0] << 56 | (uint64_t)ip[1] << 48 |
+		    (uint64_t)ip[2] << 40 | (uint64_t)ip[3] << 32 |
+		    (uint64_t)ip[4] << 24 | (uint64_t)ip[5] << 16 |
+		    (uint64_t)ip[6] << 8 | (uint64_t)ip[7];
+		return;
+	}
+
+	/* Fast path for an array of 1-byte integers (eg. the entry name) */
+	if (array_int_len == 1 && buf_int_len == 1 &&
+	    buf_len > array_len + ZAP_LEAF_ARRAY_BYTES) {
+		while (chunk != CHAIN_END) {
+			struct zap_leaf_array *la =
+			    &ZAP_LEAF_CHUNK(l, chunk).l_array;
+			bcopy(la->la_array, p, ZAP_LEAF_ARRAY_BYTES);
+			p += ZAP_LEAF_ARRAY_BYTES;
+			chunk = la->la_next;
+		}
+		return;
+	}
+
+	while (len > 0) {
+		struct zap_leaf_array *la = &ZAP_LEAF_CHUNK(l, chunk).l_array;
+		int i;
+
+		ASSERT3U(chunk, <, ZAP_LEAF_NUMCHUNKS(l));
+		for (i = 0; i < ZAP_LEAF_ARRAY_BYTES && len > 0; i++) {
+			value = (value << 8) | la->la_array[i];
+			byten++;
+			if (byten == array_int_len) {
+				stv(buf_int_len, p, value);
+				byten = 0;
+				len--;
+				if (len == 0)
+					return;
+				p += buf_int_len;
+			}
+		}
+		chunk = la->la_next;
+	}
+}
+
+static boolean_t
+zap_leaf_array_match(zap_leaf_t *l, zap_name_t *zn,
+    int chunk, int array_numints)
+{
+	int bseen = 0;
+
+	if (zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY) {
+		uint64_t *thiskey;
+		boolean_t match;
+
+		ASSERT(zn->zn_key_intlen == sizeof (*thiskey));
+		thiskey = kmem_alloc(array_numints * sizeof (*thiskey),
+		    KM_SLEEP);
+
+		zap_leaf_array_read(l, chunk, sizeof (*thiskey), array_numints,
+		    sizeof (*thiskey), array_numints, thiskey);
+		match = bcmp(thiskey, zn->zn_key_orig,
+		    array_numints * sizeof (*thiskey)) == 0;
+		kmem_free(thiskey, array_numints * sizeof (*thiskey));
+		return (match);
+	}
+
+	ASSERT(zn->zn_key_intlen == 1);
+	if (zn->zn_matchtype == MT_FIRST) {
+		char *thisname = kmem_alloc(array_numints, KM_SLEEP);
+		boolean_t match;
+
+		zap_leaf_array_read(l, chunk, sizeof (char), array_numints,
+		    sizeof (char), array_numints, thisname);
+		match = zap_match(zn, thisname);
+		kmem_free(thisname, array_numints);
+		return (match);
+	}
+
+	/*
+	 * Fast path for exact matching.
+	 * First check that the lengths match, so that we don't read
+	 * past the end of the zn_key_orig array.
+	 */
+	if (array_numints != zn->zn_key_orig_numints)
+		return (B_FALSE);
+	while (bseen < array_numints) {
+		struct zap_leaf_array *la = &ZAP_LEAF_CHUNK(l, chunk).l_array;
+		int toread = MIN(array_numints - bseen, ZAP_LEAF_ARRAY_BYTES);
+		ASSERT3U(chunk, <, ZAP_LEAF_NUMCHUNKS(l));
+		if (bcmp(la->la_array, (char *)zn->zn_key_orig + bseen, toread))
+			break;
+		chunk = la->la_next;
+		bseen += toread;
+	}
+	return (bseen == array_numints);
+}
+
+/*
+ * Routines which manipulate leaf entries.
+ */
+
+int
+zap_leaf_lookup(zap_leaf_t *l, zap_name_t *zn, zap_entry_handle_t *zeh)
+{
+	uint16_t *chunkp;
+	struct zap_leaf_entry *le;
+
+	ASSERT3U(l->l_phys->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC);
+
+again:
+	for (chunkp = LEAF_HASH_ENTPTR(l, zn->zn_hash);
+	    *chunkp != CHAIN_END; chunkp = &le->le_next) {
+		uint16_t chunk = *chunkp;
+		le = ZAP_LEAF_ENTRY(l, chunk);
+
+		ASSERT3U(chunk, <, ZAP_LEAF_NUMCHUNKS(l));
+		ASSERT3U(le->le_type, ==, ZAP_CHUNK_ENTRY);
+
+		if (le->le_hash != zn->zn_hash)
+			continue;
+
+		/*
+		 * NB: the entry chain is always sorted by cd on
+		 * normalized zap objects, so this will find the
+		 * lowest-cd match for MT_FIRST.
+		 */
+		ASSERT(zn->zn_matchtype == MT_EXACT ||
+		    (l->l_phys->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED));
+		if (zap_leaf_array_match(l, zn, le->le_name_chunk,
+		    le->le_name_numints)) {
+			zeh->zeh_num_integers = le->le_value_numints;
+			zeh->zeh_integer_size = le->le_value_intlen;
+			zeh->zeh_cd = le->le_cd;
+			zeh->zeh_hash = le->le_hash;
+			zeh->zeh_chunkp = chunkp;
+			zeh->zeh_leaf = l;
+			return (0);
+		}
+	}
+
+	/*
+	 * NB: we could of course do this in one pass, but that would be
+	 * a pain.  We'll see if MT_BEST is even used much.
+	 */
+	if (zn->zn_matchtype == MT_BEST) {
+		zn->zn_matchtype = MT_FIRST;
+		goto again;
+	}
+
+	return (ENOENT);
+}
+
+/* Return (h1,cd1 >= h2,cd2) */
+#define	HCD_GTEQ(h1, cd1, h2, cd2) \
+	((h1 > h2) ? TRUE : ((h1 == h2 && cd1 >= cd2) ? TRUE : FALSE))
+
+int
+zap_leaf_lookup_closest(zap_leaf_t *l,
+    uint64_t h, uint32_t cd, zap_entry_handle_t *zeh)
+{
+	uint16_t chunk;
+	uint64_t besth = -1ULL;
+	uint32_t bestcd = -1U;
+	uint16_t bestlh = ZAP_LEAF_HASH_NUMENTRIES(l)-1;
+	uint16_t lh;
+	struct zap_leaf_entry *le;
+
+	ASSERT3U(l->l_phys->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC);
+
+	for (lh = LEAF_HASH(l, h); lh <= bestlh; lh++) {
+		for (chunk = l->l_phys->l_hash[lh];
+		    chunk != CHAIN_END; chunk = le->le_next) {
+			le = ZAP_LEAF_ENTRY(l, chunk);
+
+			ASSERT3U(chunk, <, ZAP_LEAF_NUMCHUNKS(l));
+			ASSERT3U(le->le_type, ==, ZAP_CHUNK_ENTRY);
+
+			if (HCD_GTEQ(le->le_hash, le->le_cd, h, cd) &&
+			    HCD_GTEQ(besth, bestcd, le->le_hash, le->le_cd)) {
+				ASSERT3U(bestlh, >=, lh);
+				bestlh = lh;
+				besth = le->le_hash;
+				bestcd = le->le_cd;
+
+				zeh->zeh_num_integers = le->le_value_numints;
+				zeh->zeh_integer_size = le->le_value_intlen;
+				zeh->zeh_cd = le->le_cd;
+				zeh->zeh_hash = le->le_hash;
+				zeh->zeh_fakechunk = chunk;
+				zeh->zeh_chunkp = &zeh->zeh_fakechunk;
+				zeh->zeh_leaf = l;
+			}
+		}
+	}
+
+	return (bestcd == -1U ? ENOENT : 0);
+}
+
+int
+zap_entry_read(const zap_entry_handle_t *zeh,
+    uint8_t integer_size, uint64_t num_integers, void *buf)
+{
+	struct zap_leaf_entry *le =
+	    ZAP_LEAF_ENTRY(zeh->zeh_leaf, *zeh->zeh_chunkp);
+	ASSERT3U(le->le_type, ==, ZAP_CHUNK_ENTRY);
+
+	if (le->le_value_intlen > integer_size)
+		return (EINVAL);
+
+	zap_leaf_array_read(zeh->zeh_leaf, le->le_value_chunk,
+	    le->le_value_intlen, le->le_value_numints,
+	    integer_size, num_integers, buf);
+
+	if (zeh->zeh_num_integers > num_integers)
+		return (EOVERFLOW);
+	return (0);
+
+}
+
+int
+zap_entry_read_name(zap_t *zap, const zap_entry_handle_t *zeh, uint16_t buflen,
+    char *buf)
+{
+	struct zap_leaf_entry *le =
+	    ZAP_LEAF_ENTRY(zeh->zeh_leaf, *zeh->zeh_chunkp);
+	ASSERT3U(le->le_type, ==, ZAP_CHUNK_ENTRY);
+
+	if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) {
+		zap_leaf_array_read(zeh->zeh_leaf, le->le_name_chunk, 8,
+		    le->le_name_numints, 8, buflen / 8, buf);
+	} else {
+		zap_leaf_array_read(zeh->zeh_leaf, le->le_name_chunk, 1,
+		    le->le_name_numints, 1, buflen, buf);
+	}
+	if (le->le_name_numints > buflen)
+		return (EOVERFLOW);
+	return (0);
+}
+
+int
+zap_entry_update(zap_entry_handle_t *zeh,
+	uint8_t integer_size, uint64_t num_integers, const void *buf)
+{
+	int delta_chunks;
+	zap_leaf_t *l = zeh->zeh_leaf;
+	struct zap_leaf_entry *le = ZAP_LEAF_ENTRY(l, *zeh->zeh_chunkp);
+
+	delta_chunks = ZAP_LEAF_ARRAY_NCHUNKS(num_integers * integer_size) -
+	    ZAP_LEAF_ARRAY_NCHUNKS(le->le_value_numints * le->le_value_intlen);
+
+	if ((int)l->l_phys->l_hdr.lh_nfree < delta_chunks)
+		return (EAGAIN);
+
+	zap_leaf_array_free(l, &le->le_value_chunk);
+	le->le_value_chunk =
+	    zap_leaf_array_create(l, buf, integer_size, num_integers);
+	le->le_value_numints = num_integers;
+	le->le_value_intlen = integer_size;
+	return (0);
+}
+
+void
+zap_entry_remove(zap_entry_handle_t *zeh)
+{
+	uint16_t entry_chunk;
+	struct zap_leaf_entry *le;
+	zap_leaf_t *l = zeh->zeh_leaf;
+
+	ASSERT3P(zeh->zeh_chunkp, !=, &zeh->zeh_fakechunk);
+
+	entry_chunk = *zeh->zeh_chunkp;
+	le = ZAP_LEAF_ENTRY(l, entry_chunk);
+	ASSERT3U(le->le_type, ==, ZAP_CHUNK_ENTRY);
+
+	zap_leaf_array_free(l, &le->le_name_chunk);
+	zap_leaf_array_free(l, &le->le_value_chunk);
+
+	*zeh->zeh_chunkp = le->le_next;
+	zap_leaf_chunk_free(l, entry_chunk);
+
+	l->l_phys->l_hdr.lh_nentries--;
+}
+
+int
+zap_entry_create(zap_leaf_t *l, zap_name_t *zn, uint32_t cd,
+    uint8_t integer_size, uint64_t num_integers, const void *buf,
+    zap_entry_handle_t *zeh)
+{
+	uint16_t chunk;
+	uint16_t *chunkp;
+	struct zap_leaf_entry *le;
+	uint64_t valuelen;
+	int numchunks;
+	uint64_t h = zn->zn_hash;
+
+	valuelen = integer_size * num_integers;
+
+	numchunks = 1 + ZAP_LEAF_ARRAY_NCHUNKS(zn->zn_key_orig_numints *
+	    zn->zn_key_intlen) + ZAP_LEAF_ARRAY_NCHUNKS(valuelen);
+	if (numchunks > ZAP_LEAF_NUMCHUNKS(l))
+		return (E2BIG);
+
+	if (cd == ZAP_NEED_CD) {
+		/* find the lowest unused cd */
+		if (l->l_phys->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED) {
+			cd = 0;
+
+			for (chunk = *LEAF_HASH_ENTPTR(l, h);
+			    chunk != CHAIN_END; chunk = le->le_next) {
+				le = ZAP_LEAF_ENTRY(l, chunk);
+				if (le->le_cd > cd)
+					break;
+				if (le->le_hash == h) {
+					ASSERT3U(cd, ==, le->le_cd);
+					cd++;
+				}
+			}
+		} else {
+			/* old unsorted format; do it the O(n^2) way */
+			for (cd = 0; ; cd++) {
+				for (chunk = *LEAF_HASH_ENTPTR(l, h);
+				    chunk != CHAIN_END; chunk = le->le_next) {
+					le = ZAP_LEAF_ENTRY(l, chunk);
+					if (le->le_hash == h &&
+					    le->le_cd == cd) {
+						break;
+					}
+				}
+				/* If this cd is not in use, we are good. */
+				if (chunk == CHAIN_END)
+					break;
+			}
+		}
+		/*
+		 * We would run out of space in a block before we could
+		 * store enough entries to run out of CD values.
+		 */
+		ASSERT3U(cd, <, zap_maxcd(zn->zn_zap));
+	}
+
+	if (l->l_phys->l_hdr.lh_nfree < numchunks)
+		return (EAGAIN);
+
+	/* make the entry */
+	chunk = zap_leaf_chunk_alloc(l);
+	le = ZAP_LEAF_ENTRY(l, chunk);
+	le->le_type = ZAP_CHUNK_ENTRY;
+	le->le_name_chunk = zap_leaf_array_create(l, zn->zn_key_orig,
+	    zn->zn_key_intlen, zn->zn_key_orig_numints);
+	le->le_name_numints = zn->zn_key_orig_numints;
+	le->le_value_chunk =
+	    zap_leaf_array_create(l, buf, integer_size, num_integers);
+	le->le_value_numints = num_integers;
+	le->le_value_intlen = integer_size;
+	le->le_hash = h;
+	le->le_cd = cd;
+
+	/* link it into the hash chain */
+	/* XXX if we did the search above, we could just use that */
+	chunkp = zap_leaf_rehash_entry(l, chunk);
+
+	l->l_phys->l_hdr.lh_nentries++;
+
+	zeh->zeh_leaf = l;
+	zeh->zeh_num_integers = num_integers;
+	zeh->zeh_integer_size = le->le_value_intlen;
+	zeh->zeh_cd = le->le_cd;
+	zeh->zeh_hash = le->le_hash;
+	zeh->zeh_chunkp = chunkp;
+
+	return (0);
+}
+
+/*
+ * Determine if there is another entry with the same normalized form.
+ * For performance purposes, either zn or name must be provided (the
+ * other can be NULL).  Note, there usually won't be any hash
+ * conflicts, in which case we don't need the concatenated/normalized
+ * form of the name.  But all callers have one of these on hand anyway,
+ * so might as well take advantage.  A cleaner but slower interface
+ * would accept neither argument, and compute the normalized name as
+ * needed (using zap_name_alloc(zap_entry_read_name(zeh))).
+ */
+boolean_t
+zap_entry_normalization_conflict(zap_entry_handle_t *zeh, zap_name_t *zn,
+    const char *name, zap_t *zap)
+{
+	uint64_t chunk;
+	struct zap_leaf_entry *le;
+	boolean_t allocdzn = B_FALSE;
+
+	if (zap->zap_normflags == 0)
+		return (B_FALSE);
+
+	for (chunk = *LEAF_HASH_ENTPTR(zeh->zeh_leaf, zeh->zeh_hash);
+	    chunk != CHAIN_END; chunk = le->le_next) {
+		le = ZAP_LEAF_ENTRY(zeh->zeh_leaf, chunk);
+		if (le->le_hash != zeh->zeh_hash)
+			continue;
+		if (le->le_cd == zeh->zeh_cd)
+			continue;
+
+		if (zn == NULL) {
+			zn = zap_name_alloc(zap, name, MT_FIRST);
+			allocdzn = B_TRUE;
+		}
+		if (zap_leaf_array_match(zeh->zeh_leaf, zn,
+		    le->le_name_chunk, le->le_name_numints)) {
+			if (allocdzn)
+				zap_name_free(zn);
+			return (B_TRUE);
+		}
+	}
+	if (allocdzn)
+		zap_name_free(zn);
+	return (B_FALSE);
+}
+
+/*
+ * Routines for transferring entries between leafs.
+ */
+
+static uint16_t *
+zap_leaf_rehash_entry(zap_leaf_t *l, uint16_t entry)
+{
+	struct zap_leaf_entry *le = ZAP_LEAF_ENTRY(l, entry);
+	struct zap_leaf_entry *le2;
+	uint16_t *chunkp;
+
+	/*
+	 * keep the entry chain sorted by cd
+	 * NB: this will not cause problems for unsorted leafs, though
+	 * it is unnecessary there.
+	 */
+	for (chunkp = LEAF_HASH_ENTPTR(l, le->le_hash);
+	    *chunkp != CHAIN_END; chunkp = &le2->le_next) {
+		le2 = ZAP_LEAF_ENTRY(l, *chunkp);
+		if (le2->le_cd > le->le_cd)
+			break;
+	}
+
+	le->le_next = *chunkp;
+	*chunkp = entry;
+	return (chunkp);
+}
+
+static uint16_t
+zap_leaf_transfer_array(zap_leaf_t *l, uint16_t chunk, zap_leaf_t *nl)
+{
+	uint16_t new_chunk;
+	uint16_t *nchunkp = &new_chunk;
+
+	while (chunk != CHAIN_END) {
+		uint16_t nchunk = zap_leaf_chunk_alloc(nl);
+		struct zap_leaf_array *nla =
+		    &ZAP_LEAF_CHUNK(nl, nchunk).l_array;
+		struct zap_leaf_array *la =
+		    &ZAP_LEAF_CHUNK(l, chunk).l_array;
+		int nextchunk = la->la_next;
+
+		ASSERT3U(chunk, <, ZAP_LEAF_NUMCHUNKS(l));
+		ASSERT3U(nchunk, <, ZAP_LEAF_NUMCHUNKS(l));
+
+		*nla = *la; /* structure assignment */
+
+		zap_leaf_chunk_free(l, chunk);
+		chunk = nextchunk;
+		*nchunkp = nchunk;
+		nchunkp = &nla->la_next;
+	}
+	*nchunkp = CHAIN_END;
+	return (new_chunk);
+}
+
+static void
+zap_leaf_transfer_entry(zap_leaf_t *l, int entry, zap_leaf_t *nl)
+{
+	struct zap_leaf_entry *le, *nle;
+	uint16_t chunk;
+
+	le = ZAP_LEAF_ENTRY(l, entry);
+	ASSERT3U(le->le_type, ==, ZAP_CHUNK_ENTRY);
+
+	chunk = zap_leaf_chunk_alloc(nl);
+	nle = ZAP_LEAF_ENTRY(nl, chunk);
+	*nle = *le; /* structure assignment */
+
+	(void) zap_leaf_rehash_entry(nl, chunk);
+
+	nle->le_name_chunk = zap_leaf_transfer_array(l, le->le_name_chunk, nl);
+	nle->le_value_chunk =
+	    zap_leaf_transfer_array(l, le->le_value_chunk, nl);
+
+	zap_leaf_chunk_free(l, entry);
+
+	l->l_phys->l_hdr.lh_nentries--;
+	nl->l_phys->l_hdr.lh_nentries++;
+}
+
+/*
+ * Transfer the entries whose hash prefix ends in 1 to the new leaf.
+ */
+void
+zap_leaf_split(zap_leaf_t *l, zap_leaf_t *nl, boolean_t sort)
+{
+	int i;
+	int bit = 64 - 1 - l->l_phys->l_hdr.lh_prefix_len;
+
+	/* set new prefix and prefix_len */
+	l->l_phys->l_hdr.lh_prefix <<= 1;
+	l->l_phys->l_hdr.lh_prefix_len++;
+	nl->l_phys->l_hdr.lh_prefix = l->l_phys->l_hdr.lh_prefix | 1;
+	nl->l_phys->l_hdr.lh_prefix_len = l->l_phys->l_hdr.lh_prefix_len;
+
+	/* break existing hash chains */
+	zap_memset(l->l_phys->l_hash, CHAIN_END, 2*ZAP_LEAF_HASH_NUMENTRIES(l));
+
+	if (sort)
+		l->l_phys->l_hdr.lh_flags |= ZLF_ENTRIES_CDSORTED;
+
+	/*
+	 * Transfer entries whose hash bit 'bit' is set to nl; rehash
+	 * the remaining entries
+	 *
+	 * NB: We could find entries via the hashtable instead. That
+	 * would be O(hashents+numents) rather than O(numblks+numents),
+	 * but this accesses memory more sequentially, and when we're
+	 * called, the block is usually pretty full.
+	 */
+	for (i = 0; i < ZAP_LEAF_NUMCHUNKS(l); i++) {
+		struct zap_leaf_entry *le = ZAP_LEAF_ENTRY(l, i);
+		if (le->le_type != ZAP_CHUNK_ENTRY)
+			continue;
+
+		if (le->le_hash & (1ULL << bit))
+			zap_leaf_transfer_entry(l, i, nl);
+		else
+			(void) zap_leaf_rehash_entry(l, i);
+	}
+}
+
+void
+zap_leaf_stats(zap_t *zap, zap_leaf_t *l, zap_stats_t *zs)
+{
+	int i, n;
+
+	n = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift -
+	    l->l_phys->l_hdr.lh_prefix_len;
+	n = MIN(n, ZAP_HISTOGRAM_SIZE-1);
+	zs->zs_leafs_with_2n_pointers[n]++;
+
+
+	n = l->l_phys->l_hdr.lh_nentries/5;
+	n = MIN(n, ZAP_HISTOGRAM_SIZE-1);
+	zs->zs_blocks_with_n5_entries[n]++;
+
+	n = ((1<<FZAP_BLOCK_SHIFT(zap)) -
+	    l->l_phys->l_hdr.lh_nfree * (ZAP_LEAF_ARRAY_BYTES+1))*10 /
+	    (1<<FZAP_BLOCK_SHIFT(zap));
+	n = MIN(n, ZAP_HISTOGRAM_SIZE-1);
+	zs->zs_blocks_n_tenths_full[n]++;
+
+	for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(l); i++) {
+		int nentries = 0;
+		int chunk = l->l_phys->l_hash[i];
+
+		while (chunk != CHAIN_END) {
+			struct zap_leaf_entry *le =
+			    ZAP_LEAF_ENTRY(l, chunk);
+
+			n = 1 + ZAP_LEAF_ARRAY_NCHUNKS(le->le_name_numints) +
+			    ZAP_LEAF_ARRAY_NCHUNKS(le->le_value_numints *
+			    le->le_value_intlen);
+			n = MIN(n, ZAP_HISTOGRAM_SIZE-1);
+			zs->zs_entries_using_n_chunks[n]++;
+
+			chunk = le->le_next;
+			nentries++;
+		}
+
+		n = nentries;
+		n = MIN(n, ZAP_HISTOGRAM_SIZE-1);
+		zs->zs_buckets_with_n_entries[n]++;
+	}
+}
diff --git a/uts/common/fs/zfs/zap_micro.c b/uts/common/fs/zfs/zap_micro.c
new file mode 100644
index 000000000000..2d89c20c47d7
--- /dev/null
+++ b/uts/common/fs/zfs/zap_micro.c
@@ -0,0 +1,1455 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zio.h>
+#include <sys/spa.h>
+#include <sys/dmu.h>
+#include <sys/zfs_context.h>
+#include <sys/zap.h>
+#include <sys/refcount.h>
+#include <sys/zap_impl.h>
+#include <sys/zap_leaf.h>
+#include <sys/avl.h>
+#include <sys/arc.h>
+
+#ifdef _KERNEL
+#include <sys/sunddi.h>
+#endif
+
+static int mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags);
+
+uint64_t
+zap_getflags(zap_t *zap)
+{
+	if (zap->zap_ismicro)
+		return (0);
+	return (zap->zap_u.zap_fat.zap_phys->zap_flags);
+}
+
+int
+zap_hashbits(zap_t *zap)
+{
+	if (zap_getflags(zap) & ZAP_FLAG_HASH64)
+		return (48);
+	else
+		return (28);
+}
+
+uint32_t
+zap_maxcd(zap_t *zap)
+{
+	if (zap_getflags(zap) & ZAP_FLAG_HASH64)
+		return ((1<<16)-1);
+	else
+		return (-1U);
+}
+
+static uint64_t
+zap_hash(zap_name_t *zn)
+{
+	zap_t *zap = zn->zn_zap;
+	uint64_t h = 0;
+
+	if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) {
+		ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY);
+		h = *(uint64_t *)zn->zn_key_orig;
+	} else {
+		h = zap->zap_salt;
+		ASSERT(h != 0);
+		ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY);
+
+		if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) {
+			int i;
+			const uint64_t *wp = zn->zn_key_norm;
+
+			ASSERT(zn->zn_key_intlen == 8);
+			for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) {
+				int j;
+				uint64_t word = *wp;
+
+				for (j = 0; j < zn->zn_key_intlen; j++) {
+					h = (h >> 8) ^
+					    zfs_crc64_table[(h ^ word) & 0xFF];
+					word >>= NBBY;
+				}
+			}
+		} else {
+			int i, len;
+			const uint8_t *cp = zn->zn_key_norm;
+
+			/*
+			 * We previously stored the terminating null on
+			 * disk, but didn't hash it, so we need to
+			 * continue to not hash it.  (The
+			 * zn_key_*_numints includes the terminating
+			 * null for non-binary keys.)
+			 */
+			len = zn->zn_key_norm_numints - 1;
+
+			ASSERT(zn->zn_key_intlen == 1);
+			for (i = 0; i < len; cp++, i++) {
+				h = (h >> 8) ^
+				    zfs_crc64_table[(h ^ *cp) & 0xFF];
+			}
+		}
+	}
+	/*
+	 * Don't use all 64 bits, since we need some in the cookie for
+	 * the collision differentiator.  We MUST use the high bits,
+	 * since those are the ones that we first pay attention to when
+	 * chosing the bucket.
+	 */
+	h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1);
+
+	return (h);
+}
+
+static int
+zap_normalize(zap_t *zap, const char *name, char *namenorm)
+{
+	size_t inlen, outlen;
+	int err;
+
+	ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY));
+
+	inlen = strlen(name) + 1;
+	outlen = ZAP_MAXNAMELEN;
+
+	err = 0;
+	(void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen,
+	    zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL |
+	    U8_TEXTPREP_IGNORE_INVALID, U8_UNICODE_LATEST, &err);
+
+	return (err);
+}
+
+boolean_t
+zap_match(zap_name_t *zn, const char *matchname)
+{
+	ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY));
+
+	if (zn->zn_matchtype == MT_FIRST) {
+		char norm[ZAP_MAXNAMELEN];
+
+		if (zap_normalize(zn->zn_zap, matchname, norm) != 0)
+			return (B_FALSE);
+
+		return (strcmp(zn->zn_key_norm, norm) == 0);
+	} else {
+		/* MT_BEST or MT_EXACT */
+		return (strcmp(zn->zn_key_orig, matchname) == 0);
+	}
+}
+
+void
+zap_name_free(zap_name_t *zn)
+{
+	kmem_free(zn, sizeof (zap_name_t));
+}
+
+zap_name_t *
+zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt)
+{
+	zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP);
+
+	zn->zn_zap = zap;
+	zn->zn_key_intlen = sizeof (*key);
+	zn->zn_key_orig = key;
+	zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1;
+	zn->zn_matchtype = mt;
+	if (zap->zap_normflags) {
+		if (zap_normalize(zap, key, zn->zn_normbuf) != 0) {
+			zap_name_free(zn);
+			return (NULL);
+		}
+		zn->zn_key_norm = zn->zn_normbuf;
+		zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1;
+	} else {
+		if (mt != MT_EXACT) {
+			zap_name_free(zn);
+			return (NULL);
+		}
+		zn->zn_key_norm = zn->zn_key_orig;
+		zn->zn_key_norm_numints = zn->zn_key_orig_numints;
+	}
+
+	zn->zn_hash = zap_hash(zn);
+	return (zn);
+}
+
+zap_name_t *
+zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints)
+{
+	zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP);
+
+	ASSERT(zap->zap_normflags == 0);
+	zn->zn_zap = zap;
+	zn->zn_key_intlen = sizeof (*key);
+	zn->zn_key_orig = zn->zn_key_norm = key;
+	zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints;
+	zn->zn_matchtype = MT_EXACT;
+
+	zn->zn_hash = zap_hash(zn);
+	return (zn);
+}
+
+static void
+mzap_byteswap(mzap_phys_t *buf, size_t size)
+{
+	int i, max;
+	buf->mz_block_type = BSWAP_64(buf->mz_block_type);
+	buf->mz_salt = BSWAP_64(buf->mz_salt);
+	buf->mz_normflags = BSWAP_64(buf->mz_normflags);
+	max = (size / MZAP_ENT_LEN) - 1;
+	for (i = 0; i < max; i++) {
+		buf->mz_chunk[i].mze_value =
+		    BSWAP_64(buf->mz_chunk[i].mze_value);
+		buf->mz_chunk[i].mze_cd =
+		    BSWAP_32(buf->mz_chunk[i].mze_cd);
+	}
+}
+
+void
+zap_byteswap(void *buf, size_t size)
+{
+	uint64_t block_type;
+
+	block_type = *(uint64_t *)buf;
+
+	if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) {
+		/* ASSERT(magic == ZAP_LEAF_MAGIC); */
+		mzap_byteswap(buf, size);
+	} else {
+		fzap_byteswap(buf, size);
+	}
+}
+
+static int
+mze_compare(const void *arg1, const void *arg2)
+{
+	const mzap_ent_t *mze1 = arg1;
+	const mzap_ent_t *mze2 = arg2;
+
+	if (mze1->mze_hash > mze2->mze_hash)
+		return (+1);
+	if (mze1->mze_hash < mze2->mze_hash)
+		return (-1);
+	if (mze1->mze_cd > mze2->mze_cd)
+		return (+1);
+	if (mze1->mze_cd < mze2->mze_cd)
+		return (-1);
+	return (0);
+}
+
+static void
+mze_insert(zap_t *zap, int chunkid, uint64_t hash)
+{
+	mzap_ent_t *mze;
+
+	ASSERT(zap->zap_ismicro);
+	ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
+
+	mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP);
+	mze->mze_chunkid = chunkid;
+	mze->mze_hash = hash;
+	mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd;
+	ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0);
+	avl_add(&zap->zap_m.zap_avl, mze);
+}
+
+static mzap_ent_t *
+mze_find(zap_name_t *zn)
+{
+	mzap_ent_t mze_tofind;
+	mzap_ent_t *mze;
+	avl_index_t idx;
+	avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl;
+
+	ASSERT(zn->zn_zap->zap_ismicro);
+	ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock));
+
+	mze_tofind.mze_hash = zn->zn_hash;
+	mze_tofind.mze_cd = 0;
+
+again:
+	mze = avl_find(avl, &mze_tofind, &idx);
+	if (mze == NULL)
+		mze = avl_nearest(avl, idx, AVL_AFTER);
+	for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) {
+		ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd);
+		if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name))
+			return (mze);
+	}
+	if (zn->zn_matchtype == MT_BEST) {
+		zn->zn_matchtype = MT_FIRST;
+		goto again;
+	}
+	return (NULL);
+}
+
+static uint32_t
+mze_find_unused_cd(zap_t *zap, uint64_t hash)
+{
+	mzap_ent_t mze_tofind;
+	mzap_ent_t *mze;
+	avl_index_t idx;
+	avl_tree_t *avl = &zap->zap_m.zap_avl;
+	uint32_t cd;
+
+	ASSERT(zap->zap_ismicro);
+	ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
+
+	mze_tofind.mze_hash = hash;
+	mze_tofind.mze_cd = 0;
+
+	cd = 0;
+	for (mze = avl_find(avl, &mze_tofind, &idx);
+	    mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) {
+		if (mze->mze_cd != cd)
+			break;
+		cd++;
+	}
+
+	return (cd);
+}
+
+static void
+mze_remove(zap_t *zap, mzap_ent_t *mze)
+{
+	ASSERT(zap->zap_ismicro);
+	ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
+
+	avl_remove(&zap->zap_m.zap_avl, mze);
+	kmem_free(mze, sizeof (mzap_ent_t));
+}
+
+static void
+mze_destroy(zap_t *zap)
+{
+	mzap_ent_t *mze;
+	void *avlcookie = NULL;
+
+	while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie))
+		kmem_free(mze, sizeof (mzap_ent_t));
+	avl_destroy(&zap->zap_m.zap_avl);
+}
+
+static zap_t *
+mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db)
+{
+	zap_t *winner;
+	zap_t *zap;
+	int i;
+
+	ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t));
+
+	zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP);
+	rw_init(&zap->zap_rwlock, 0, 0, 0);
+	rw_enter(&zap->zap_rwlock, RW_WRITER);
+	zap->zap_objset = os;
+	zap->zap_object = obj;
+	zap->zap_dbuf = db;
+
+	if (*(uint64_t *)db->db_data != ZBT_MICRO) {
+		mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0);
+		zap->zap_f.zap_block_shift = highbit(db->db_size) - 1;
+	} else {
+		zap->zap_ismicro = TRUE;
+	}
+
+	/*
+	 * Make sure that zap_ismicro is set before we let others see
+	 * it, because zap_lockdir() checks zap_ismicro without the lock
+	 * held.
+	 */
+	winner = dmu_buf_set_user(db, zap, &zap->zap_m.zap_phys, zap_evict);
+
+	if (winner != NULL) {
+		rw_exit(&zap->zap_rwlock);
+		rw_destroy(&zap->zap_rwlock);
+		if (!zap->zap_ismicro)
+			mutex_destroy(&zap->zap_f.zap_num_entries_mtx);
+		kmem_free(zap, sizeof (zap_t));
+		return (winner);
+	}
+
+	if (zap->zap_ismicro) {
+		zap->zap_salt = zap->zap_m.zap_phys->mz_salt;
+		zap->zap_normflags = zap->zap_m.zap_phys->mz_normflags;
+		zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1;
+		avl_create(&zap->zap_m.zap_avl, mze_compare,
+		    sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node));
+
+		for (i = 0; i < zap->zap_m.zap_num_chunks; i++) {
+			mzap_ent_phys_t *mze =
+			    &zap->zap_m.zap_phys->mz_chunk[i];
+			if (mze->mze_name[0]) {
+				zap_name_t *zn;
+
+				zap->zap_m.zap_num_entries++;
+				zn = zap_name_alloc(zap, mze->mze_name,
+				    MT_EXACT);
+				mze_insert(zap, i, zn->zn_hash);
+				zap_name_free(zn);
+			}
+		}
+	} else {
+		zap->zap_salt = zap->zap_f.zap_phys->zap_salt;
+		zap->zap_normflags = zap->zap_f.zap_phys->zap_normflags;
+
+		ASSERT3U(sizeof (struct zap_leaf_header), ==,
+		    2*ZAP_LEAF_CHUNKSIZE);
+
+		/*
+		 * The embedded pointer table should not overlap the
+		 * other members.
+		 */
+		ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >,
+		    &zap->zap_f.zap_phys->zap_salt);
+
+		/*
+		 * The embedded pointer table should end at the end of
+		 * the block
+		 */
+		ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap,
+		    1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) -
+		    (uintptr_t)zap->zap_f.zap_phys, ==,
+		    zap->zap_dbuf->db_size);
+	}
+	rw_exit(&zap->zap_rwlock);
+	return (zap);
+}
+
+int
+zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx,
+    krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp)
+{
+	zap_t *zap;
+	dmu_buf_t *db;
+	krw_t lt;
+	int err;
+
+	*zapp = NULL;
+
+	err = dmu_buf_hold(os, obj, 0, NULL, &db, DMU_READ_NO_PREFETCH);
+	if (err)
+		return (err);
+
+#ifdef ZFS_DEBUG
+	{
+		dmu_object_info_t doi;
+		dmu_object_info_from_db(db, &doi);
+		ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap);
+	}
+#endif
+
+	zap = dmu_buf_get_user(db);
+	if (zap == NULL)
+		zap = mzap_open(os, obj, db);
+
+	/*
+	 * We're checking zap_ismicro without the lock held, in order to
+	 * tell what type of lock we want.  Once we have some sort of
+	 * lock, see if it really is the right type.  In practice this
+	 * can only be different if it was upgraded from micro to fat,
+	 * and micro wanted WRITER but fat only needs READER.
+	 */
+	lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti;
+	rw_enter(&zap->zap_rwlock, lt);
+	if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) {
+		/* it was upgraded, now we only need reader */
+		ASSERT(lt == RW_WRITER);
+		ASSERT(RW_READER ==
+		    (!zap->zap_ismicro && fatreader) ? RW_READER : lti);
+		rw_downgrade(&zap->zap_rwlock);
+		lt = RW_READER;
+	}
+
+	zap->zap_objset = os;
+
+	if (lt == RW_WRITER)
+		dmu_buf_will_dirty(db, tx);
+
+	ASSERT3P(zap->zap_dbuf, ==, db);
+
+	ASSERT(!zap->zap_ismicro ||
+	    zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks);
+	if (zap->zap_ismicro && tx && adding &&
+	    zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) {
+		uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE;
+		if (newsz > MZAP_MAX_BLKSZ) {
+			dprintf("upgrading obj %llu: num_entries=%u\n",
+			    obj, zap->zap_m.zap_num_entries);
+			*zapp = zap;
+			return (mzap_upgrade(zapp, tx, 0));
+		}
+		err = dmu_object_set_blocksize(os, obj, newsz, 0, tx);
+		ASSERT3U(err, ==, 0);
+		zap->zap_m.zap_num_chunks =
+		    db->db_size / MZAP_ENT_LEN - 1;
+	}
+
+	*zapp = zap;
+	return (0);
+}
+
+void
+zap_unlockdir(zap_t *zap)
+{
+	rw_exit(&zap->zap_rwlock);
+	dmu_buf_rele(zap->zap_dbuf, NULL);
+}
+
+static int
+mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags)
+{
+	mzap_phys_t *mzp;
+	int i, sz, nchunks;
+	int err = 0;
+	zap_t *zap = *zapp;
+
+	ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
+
+	sz = zap->zap_dbuf->db_size;
+	mzp = kmem_alloc(sz, KM_SLEEP);
+	bcopy(zap->zap_dbuf->db_data, mzp, sz);
+	nchunks = zap->zap_m.zap_num_chunks;
+
+	if (!flags) {
+		err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object,
+		    1ULL << fzap_default_block_shift, 0, tx);
+		if (err) {
+			kmem_free(mzp, sz);
+			return (err);
+		}
+	}
+
+	dprintf("upgrading obj=%llu with %u chunks\n",
+	    zap->zap_object, nchunks);
+	/* XXX destroy the avl later, so we can use the stored hash value */
+	mze_destroy(zap);
+
+	fzap_upgrade(zap, tx, flags);
+
+	for (i = 0; i < nchunks; i++) {
+		mzap_ent_phys_t *mze = &mzp->mz_chunk[i];
+		zap_name_t *zn;
+		if (mze->mze_name[0] == 0)
+			continue;
+		dprintf("adding %s=%llu\n",
+		    mze->mze_name, mze->mze_value);
+		zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT);
+		err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx);
+		zap = zn->zn_zap;	/* fzap_add_cd() may change zap */
+		zap_name_free(zn);
+		if (err)
+			break;
+	}
+	kmem_free(mzp, sz);
+	*zapp = zap;
+	return (err);
+}
+
+static void
+mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags,
+    dmu_tx_t *tx)
+{
+	dmu_buf_t *db;
+	mzap_phys_t *zp;
+
+	VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH));
+
+#ifdef ZFS_DEBUG
+	{
+		dmu_object_info_t doi;
+		dmu_object_info_from_db(db, &doi);
+		ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap);
+	}
+#endif
+
+	dmu_buf_will_dirty(db, tx);
+	zp = db->db_data;
+	zp->mz_block_type = ZBT_MICRO;
+	zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL;
+	zp->mz_normflags = normflags;
+	dmu_buf_rele(db, FTAG);
+
+	if (flags != 0) {
+		zap_t *zap;
+		/* Only fat zap supports flags; upgrade immediately. */
+		VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER,
+		    B_FALSE, B_FALSE, &zap));
+		VERIFY3U(0, ==, mzap_upgrade(&zap, tx, flags));
+		zap_unlockdir(zap);
+	}
+}
+
+int
+zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
+{
+	return (zap_create_claim_norm(os, obj,
+	    0, ot, bonustype, bonuslen, tx));
+}
+
+int
+zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags,
+    dmu_object_type_t ot,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
+{
+	int err;
+
+	err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx);
+	if (err != 0)
+		return (err);
+	mzap_create_impl(os, obj, normflags, 0, tx);
+	return (0);
+}
+
+uint64_t
+zap_create(objset_t *os, dmu_object_type_t ot,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
+{
+	return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx));
+}
+
+uint64_t
+zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
+{
+	uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx);
+
+	mzap_create_impl(os, obj, normflags, 0, tx);
+	return (obj);
+}
+
+uint64_t
+zap_create_flags(objset_t *os, int normflags, zap_flags_t flags,
+    dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
+{
+	uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx);
+
+	ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT &&
+	    leaf_blockshift <= SPA_MAXBLOCKSHIFT &&
+	    indirect_blockshift >= SPA_MINBLOCKSHIFT &&
+	    indirect_blockshift <= SPA_MAXBLOCKSHIFT);
+
+	VERIFY(dmu_object_set_blocksize(os, obj,
+	    1ULL << leaf_blockshift, indirect_blockshift, tx) == 0);
+
+	mzap_create_impl(os, obj, normflags, flags, tx);
+	return (obj);
+}
+
+int
+zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx)
+{
+	/*
+	 * dmu_object_free will free the object number and free the
+	 * data.  Freeing the data will cause our pageout function to be
+	 * called, which will destroy our data (zap_leaf_t's and zap_t).
+	 */
+
+	return (dmu_object_free(os, zapobj, tx));
+}
+
+_NOTE(ARGSUSED(0))
+void
+zap_evict(dmu_buf_t *db, void *vzap)
+{
+	zap_t *zap = vzap;
+
+	rw_destroy(&zap->zap_rwlock);
+
+	if (zap->zap_ismicro)
+		mze_destroy(zap);
+	else
+		mutex_destroy(&zap->zap_f.zap_num_entries_mtx);
+
+	kmem_free(zap, sizeof (zap_t));
+}
+
+int
+zap_count(objset_t *os, uint64_t zapobj, uint64_t *count)
+{
+	zap_t *zap;
+	int err;
+
+	err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
+	if (err)
+		return (err);
+	if (!zap->zap_ismicro) {
+		err = fzap_count(zap, count);
+	} else {
+		*count = zap->zap_m.zap_num_entries;
+	}
+	zap_unlockdir(zap);
+	return (err);
+}
+
+/*
+ * zn may be NULL; if not specified, it will be computed if needed.
+ * See also the comment above zap_entry_normalization_conflict().
+ */
+static boolean_t
+mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze)
+{
+	mzap_ent_t *other;
+	int direction = AVL_BEFORE;
+	boolean_t allocdzn = B_FALSE;
+
+	if (zap->zap_normflags == 0)
+		return (B_FALSE);
+
+again:
+	for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction);
+	    other && other->mze_hash == mze->mze_hash;
+	    other = avl_walk(&zap->zap_m.zap_avl, other, direction)) {
+
+		if (zn == NULL) {
+			zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name,
+			    MT_FIRST);
+			allocdzn = B_TRUE;
+		}
+		if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) {
+			if (allocdzn)
+				zap_name_free(zn);
+			return (B_TRUE);
+		}
+	}
+
+	if (direction == AVL_BEFORE) {
+		direction = AVL_AFTER;
+		goto again;
+	}
+
+	if (allocdzn)
+		zap_name_free(zn);
+	return (B_FALSE);
+}
+
+/*
+ * Routines for manipulating attributes.
+ */
+
+int
+zap_lookup(objset_t *os, uint64_t zapobj, const char *name,
+    uint64_t integer_size, uint64_t num_integers, void *buf)
+{
+	return (zap_lookup_norm(os, zapobj, name, integer_size,
+	    num_integers, buf, MT_EXACT, NULL, 0, NULL));
+}
+
+int
+zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name,
+    uint64_t integer_size, uint64_t num_integers, void *buf,
+    matchtype_t mt, char *realname, int rn_len,
+    boolean_t *ncp)
+{
+	zap_t *zap;
+	int err;
+	mzap_ent_t *mze;
+	zap_name_t *zn;
+
+	err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
+	if (err)
+		return (err);
+	zn = zap_name_alloc(zap, name, mt);
+	if (zn == NULL) {
+		zap_unlockdir(zap);
+		return (ENOTSUP);
+	}
+
+	if (!zap->zap_ismicro) {
+		err = fzap_lookup(zn, integer_size, num_integers, buf,
+		    realname, rn_len, ncp);
+	} else {
+		mze = mze_find(zn);
+		if (mze == NULL) {
+			err = ENOENT;
+		} else {
+			if (num_integers < 1) {
+				err = EOVERFLOW;
+			} else if (integer_size != 8) {
+				err = EINVAL;
+			} else {
+				*(uint64_t *)buf =
+				    MZE_PHYS(zap, mze)->mze_value;
+				(void) strlcpy(realname,
+				    MZE_PHYS(zap, mze)->mze_name, rn_len);
+				if (ncp) {
+					*ncp = mzap_normalization_conflict(zap,
+					    zn, mze);
+				}
+			}
+		}
+	}
+	zap_name_free(zn);
+	zap_unlockdir(zap);
+	return (err);
+}
+
+int
+zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
+    int key_numints)
+{
+	zap_t *zap;
+	int err;
+	zap_name_t *zn;
+
+	err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
+	if (err)
+		return (err);
+	zn = zap_name_alloc_uint64(zap, key, key_numints);
+	if (zn == NULL) {
+		zap_unlockdir(zap);
+		return (ENOTSUP);
+	}
+
+	fzap_prefetch(zn);
+	zap_name_free(zn);
+	zap_unlockdir(zap);
+	return (err);
+}
+
+int
+zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
+    int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf)
+{
+	zap_t *zap;
+	int err;
+	zap_name_t *zn;
+
+	err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
+	if (err)
+		return (err);
+	zn = zap_name_alloc_uint64(zap, key, key_numints);
+	if (zn == NULL) {
+		zap_unlockdir(zap);
+		return (ENOTSUP);
+	}
+
+	err = fzap_lookup(zn, integer_size, num_integers, buf,
+	    NULL, 0, NULL);
+	zap_name_free(zn);
+	zap_unlockdir(zap);
+	return (err);
+}
+
+int
+zap_contains(objset_t *os, uint64_t zapobj, const char *name)
+{
+	int err = (zap_lookup_norm(os, zapobj, name, 0,
+	    0, NULL, MT_EXACT, NULL, 0, NULL));
+	if (err == EOVERFLOW || err == EINVAL)
+		err = 0; /* found, but skipped reading the value */
+	return (err);
+}
+
+int
+zap_length(objset_t *os, uint64_t zapobj, const char *name,
+    uint64_t *integer_size, uint64_t *num_integers)
+{
+	zap_t *zap;
+	int err;
+	mzap_ent_t *mze;
+	zap_name_t *zn;
+
+	err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
+	if (err)
+		return (err);
+	zn = zap_name_alloc(zap, name, MT_EXACT);
+	if (zn == NULL) {
+		zap_unlockdir(zap);
+		return (ENOTSUP);
+	}
+	if (!zap->zap_ismicro) {
+		err = fzap_length(zn, integer_size, num_integers);
+	} else {
+		mze = mze_find(zn);
+		if (mze == NULL) {
+			err = ENOENT;
+		} else {
+			if (integer_size)
+				*integer_size = 8;
+			if (num_integers)
+				*num_integers = 1;
+		}
+	}
+	zap_name_free(zn);
+	zap_unlockdir(zap);
+	return (err);
+}
+
+int
+zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
+    int key_numints, uint64_t *integer_size, uint64_t *num_integers)
+{
+	zap_t *zap;
+	int err;
+	zap_name_t *zn;
+
+	err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
+	if (err)
+		return (err);
+	zn = zap_name_alloc_uint64(zap, key, key_numints);
+	if (zn == NULL) {
+		zap_unlockdir(zap);
+		return (ENOTSUP);
+	}
+	err = fzap_length(zn, integer_size, num_integers);
+	zap_name_free(zn);
+	zap_unlockdir(zap);
+	return (err);
+}
+
+static void
+mzap_addent(zap_name_t *zn, uint64_t value)
+{
+	int i;
+	zap_t *zap = zn->zn_zap;
+	int start = zap->zap_m.zap_alloc_next;
+	uint32_t cd;
+
+	ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
+
+#ifdef ZFS_DEBUG
+	for (i = 0; i < zap->zap_m.zap_num_chunks; i++) {
+		mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i];
+		ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0);
+	}
+#endif
+
+	cd = mze_find_unused_cd(zap, zn->zn_hash);
+	/* given the limited size of the microzap, this can't happen */
+	ASSERT(cd < zap_maxcd(zap));
+
+again:
+	for (i = start; i < zap->zap_m.zap_num_chunks; i++) {
+		mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i];
+		if (mze->mze_name[0] == 0) {
+			mze->mze_value = value;
+			mze->mze_cd = cd;
+			(void) strcpy(mze->mze_name, zn->zn_key_orig);
+			zap->zap_m.zap_num_entries++;
+			zap->zap_m.zap_alloc_next = i+1;
+			if (zap->zap_m.zap_alloc_next ==
+			    zap->zap_m.zap_num_chunks)
+				zap->zap_m.zap_alloc_next = 0;
+			mze_insert(zap, i, zn->zn_hash);
+			return;
+		}
+	}
+	if (start != 0) {
+		start = 0;
+		goto again;
+	}
+	ASSERT(!"out of entries!");
+}
+
+int
+zap_add(objset_t *os, uint64_t zapobj, const char *key,
+    int integer_size, uint64_t num_integers,
+    const void *val, dmu_tx_t *tx)
+{
+	zap_t *zap;
+	int err;
+	mzap_ent_t *mze;
+	const uint64_t *intval = val;
+	zap_name_t *zn;
+
+	err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap);
+	if (err)
+		return (err);
+	zn = zap_name_alloc(zap, key, MT_EXACT);
+	if (zn == NULL) {
+		zap_unlockdir(zap);
+		return (ENOTSUP);
+	}
+	if (!zap->zap_ismicro) {
+		err = fzap_add(zn, integer_size, num_integers, val, tx);
+		zap = zn->zn_zap;	/* fzap_add() may change zap */
+	} else if (integer_size != 8 || num_integers != 1 ||
+	    strlen(key) >= MZAP_NAME_LEN) {
+		err = mzap_upgrade(&zn->zn_zap, tx, 0);
+		if (err == 0)
+			err = fzap_add(zn, integer_size, num_integers, val, tx);
+		zap = zn->zn_zap;	/* fzap_add() may change zap */
+	} else {
+		mze = mze_find(zn);
+		if (mze != NULL) {
+			err = EEXIST;
+		} else {
+			mzap_addent(zn, *intval);
+		}
+	}
+	ASSERT(zap == zn->zn_zap);
+	zap_name_free(zn);
+	if (zap != NULL)	/* may be NULL if fzap_add() failed */
+		zap_unlockdir(zap);
+	return (err);
+}
+
+int
+zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
+    int key_numints, int integer_size, uint64_t num_integers,
+    const void *val, dmu_tx_t *tx)
+{
+	zap_t *zap;
+	int err;
+	zap_name_t *zn;
+
+	err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap);
+	if (err)
+		return (err);
+	zn = zap_name_alloc_uint64(zap, key, key_numints);
+	if (zn == NULL) {
+		zap_unlockdir(zap);
+		return (ENOTSUP);
+	}
+	err = fzap_add(zn, integer_size, num_integers, val, tx);
+	zap = zn->zn_zap;	/* fzap_add() may change zap */
+	zap_name_free(zn);
+	if (zap != NULL)	/* may be NULL if fzap_add() failed */
+		zap_unlockdir(zap);
+	return (err);
+}
+
+int
+zap_update(objset_t *os, uint64_t zapobj, const char *name,
+    int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx)
+{
+	zap_t *zap;
+	mzap_ent_t *mze;
+	uint64_t oldval;
+	const uint64_t *intval = val;
+	zap_name_t *zn;
+	int err;
+
+#ifdef ZFS_DEBUG
+	/*
+	 * If there is an old value, it shouldn't change across the
+	 * lockdir (eg, due to bprewrite's xlation).
+	 */
+	if (integer_size == 8 && num_integers == 1)
+		(void) zap_lookup(os, zapobj, name, 8, 1, &oldval);
+#endif
+
+	err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap);
+	if (err)
+		return (err);
+	zn = zap_name_alloc(zap, name, MT_EXACT);
+	if (zn == NULL) {
+		zap_unlockdir(zap);
+		return (ENOTSUP);
+	}
+	if (!zap->zap_ismicro) {
+		err = fzap_update(zn, integer_size, num_integers, val, tx);
+		zap = zn->zn_zap;	/* fzap_update() may change zap */
+	} else if (integer_size != 8 || num_integers != 1 ||
+	    strlen(name) >= MZAP_NAME_LEN) {
+		dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n",
+		    zapobj, integer_size, num_integers, name);
+		err = mzap_upgrade(&zn->zn_zap, tx, 0);
+		if (err == 0)
+			err = fzap_update(zn, integer_size, num_integers,
+			    val, tx);
+		zap = zn->zn_zap;	/* fzap_update() may change zap */
+	} else {
+		mze = mze_find(zn);
+		if (mze != NULL) {
+			ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval);
+			MZE_PHYS(zap, mze)->mze_value = *intval;
+		} else {
+			mzap_addent(zn, *intval);
+		}
+	}
+	ASSERT(zap == zn->zn_zap);
+	zap_name_free(zn);
+	if (zap != NULL)	/* may be NULL if fzap_upgrade() failed */
+		zap_unlockdir(zap);
+	return (err);
+}
+
+int
+zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
+    int key_numints,
+    int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx)
+{
+	zap_t *zap;
+	zap_name_t *zn;
+	int err;
+
+	err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap);
+	if (err)
+		return (err);
+	zn = zap_name_alloc_uint64(zap, key, key_numints);
+	if (zn == NULL) {
+		zap_unlockdir(zap);
+		return (ENOTSUP);
+	}
+	err = fzap_update(zn, integer_size, num_integers, val, tx);
+	zap = zn->zn_zap;	/* fzap_update() may change zap */
+	zap_name_free(zn);
+	if (zap != NULL)	/* may be NULL if fzap_upgrade() failed */
+		zap_unlockdir(zap);
+	return (err);
+}
+
+int
+zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx)
+{
+	return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx));
+}
+
+int
+zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name,
+    matchtype_t mt, dmu_tx_t *tx)
+{
+	zap_t *zap;
+	int err;
+	mzap_ent_t *mze;
+	zap_name_t *zn;
+
+	err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap);
+	if (err)
+		return (err);
+	zn = zap_name_alloc(zap, name, mt);
+	if (zn == NULL) {
+		zap_unlockdir(zap);
+		return (ENOTSUP);
+	}
+	if (!zap->zap_ismicro) {
+		err = fzap_remove(zn, tx);
+	} else {
+		mze = mze_find(zn);
+		if (mze == NULL) {
+			err = ENOENT;
+		} else {
+			zap->zap_m.zap_num_entries--;
+			bzero(&zap->zap_m.zap_phys->mz_chunk[mze->mze_chunkid],
+			    sizeof (mzap_ent_phys_t));
+			mze_remove(zap, mze);
+		}
+	}
+	zap_name_free(zn);
+	zap_unlockdir(zap);
+	return (err);
+}
+
+int
+zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
+    int key_numints, dmu_tx_t *tx)
+{
+	zap_t *zap;
+	int err;
+	zap_name_t *zn;
+
+	err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap);
+	if (err)
+		return (err);
+	zn = zap_name_alloc_uint64(zap, key, key_numints);
+	if (zn == NULL) {
+		zap_unlockdir(zap);
+		return (ENOTSUP);
+	}
+	err = fzap_remove(zn, tx);
+	zap_name_free(zn);
+	zap_unlockdir(zap);
+	return (err);
+}
+
+/*
+ * Routines for iterating over the attributes.
+ */
+
+void
+zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj,
+    uint64_t serialized)
+{
+	zc->zc_objset = os;
+	zc->zc_zap = NULL;
+	zc->zc_leaf = NULL;
+	zc->zc_zapobj = zapobj;
+	zc->zc_serialized = serialized;
+	zc->zc_hash = 0;
+	zc->zc_cd = 0;
+}
+
+void
+zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj)
+{
+	zap_cursor_init_serialized(zc, os, zapobj, 0);
+}
+
+void
+zap_cursor_fini(zap_cursor_t *zc)
+{
+	if (zc->zc_zap) {
+		rw_enter(&zc->zc_zap->zap_rwlock, RW_READER);
+		zap_unlockdir(zc->zc_zap);
+		zc->zc_zap = NULL;
+	}
+	if (zc->zc_leaf) {
+		rw_enter(&zc->zc_leaf->l_rwlock, RW_READER);
+		zap_put_leaf(zc->zc_leaf);
+		zc->zc_leaf = NULL;
+	}
+	zc->zc_objset = NULL;
+}
+
+uint64_t
+zap_cursor_serialize(zap_cursor_t *zc)
+{
+	if (zc->zc_hash == -1ULL)
+		return (-1ULL);
+	if (zc->zc_zap == NULL)
+		return (zc->zc_serialized);
+	ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0);
+	ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap));
+
+	/*
+	 * We want to keep the high 32 bits of the cursor zero if we can, so
+	 * that 32-bit programs can access this.  So usually use a small
+	 * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits
+	 * of the cursor.
+	 *
+	 * [ collision differentiator | zap_hashbits()-bit hash value ]
+	 */
+	return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) |
+	    ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap)));
+}
+
+int
+zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za)
+{
+	int err;
+	avl_index_t idx;
+	mzap_ent_t mze_tofind;
+	mzap_ent_t *mze;
+
+	if (zc->zc_hash == -1ULL)
+		return (ENOENT);
+
+	if (zc->zc_zap == NULL) {
+		int hb;
+		err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL,
+		    RW_READER, TRUE, FALSE, &zc->zc_zap);
+		if (err)
+			return (err);
+
+		/*
+		 * To support zap_cursor_init_serialized, advance, retrieve,
+		 * we must add to the existing zc_cd, which may already
+		 * be 1 due to the zap_cursor_advance.
+		 */
+		ASSERT(zc->zc_hash == 0);
+		hb = zap_hashbits(zc->zc_zap);
+		zc->zc_hash = zc->zc_serialized << (64 - hb);
+		zc->zc_cd += zc->zc_serialized >> hb;
+		if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */
+			zc->zc_cd = 0;
+	} else {
+		rw_enter(&zc->zc_zap->zap_rwlock, RW_READER);
+	}
+	if (!zc->zc_zap->zap_ismicro) {
+		err = fzap_cursor_retrieve(zc->zc_zap, zc, za);
+	} else {
+		err = ENOENT;
+
+		mze_tofind.mze_hash = zc->zc_hash;
+		mze_tofind.mze_cd = zc->zc_cd;
+
+		mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx);
+		if (mze == NULL) {
+			mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl,
+			    idx, AVL_AFTER);
+		}
+		if (mze) {
+			mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze);
+			ASSERT3U(mze->mze_cd, ==, mzep->mze_cd);
+			za->za_normalization_conflict =
+			    mzap_normalization_conflict(zc->zc_zap, NULL, mze);
+			za->za_integer_length = 8;
+			za->za_num_integers = 1;
+			za->za_first_integer = mzep->mze_value;
+			(void) strcpy(za->za_name, mzep->mze_name);
+			zc->zc_hash = mze->mze_hash;
+			zc->zc_cd = mze->mze_cd;
+			err = 0;
+		} else {
+			zc->zc_hash = -1ULL;
+		}
+	}
+	rw_exit(&zc->zc_zap->zap_rwlock);
+	return (err);
+}
+
+void
+zap_cursor_advance(zap_cursor_t *zc)
+{
+	if (zc->zc_hash == -1ULL)
+		return;
+	zc->zc_cd++;
+}
+
+int
+zap_cursor_move_to_key(zap_cursor_t *zc, const char *name, matchtype_t mt)
+{
+	int err = 0;
+	mzap_ent_t *mze;
+	zap_name_t *zn;
+
+	if (zc->zc_zap == NULL) {
+		err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL,
+		    RW_READER, TRUE, FALSE, &zc->zc_zap);
+		if (err)
+			return (err);
+	} else {
+		rw_enter(&zc->zc_zap->zap_rwlock, RW_READER);
+	}
+
+	zn = zap_name_alloc(zc->zc_zap, name, mt);
+	if (zn == NULL) {
+		rw_exit(&zc->zc_zap->zap_rwlock);
+		return (ENOTSUP);
+	}
+
+	if (!zc->zc_zap->zap_ismicro) {
+		err = fzap_cursor_move_to_key(zc, zn);
+	} else {
+		mze = mze_find(zn);
+		if (mze == NULL) {
+			err = ENOENT;
+			goto out;
+		}
+		zc->zc_hash = mze->mze_hash;
+		zc->zc_cd = mze->mze_cd;
+	}
+
+out:
+	zap_name_free(zn);
+	rw_exit(&zc->zc_zap->zap_rwlock);
+	return (err);
+}
+
+int
+zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs)
+{
+	int err;
+	zap_t *zap;
+
+	err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
+	if (err)
+		return (err);
+
+	bzero(zs, sizeof (zap_stats_t));
+
+	if (zap->zap_ismicro) {
+		zs->zs_blocksize = zap->zap_dbuf->db_size;
+		zs->zs_num_entries = zap->zap_m.zap_num_entries;
+		zs->zs_num_blocks = 1;
+	} else {
+		fzap_get_stats(zap, zs);
+	}
+	zap_unlockdir(zap);
+	return (0);
+}
+
+int
+zap_count_write(objset_t *os, uint64_t zapobj, const char *name, int add,
+    uint64_t *towrite, uint64_t *tooverwrite)
+{
+	zap_t *zap;
+	int err = 0;
+
+
+	/*
+	 * Since, we don't have a name, we cannot figure out which blocks will
+	 * be affected in this operation. So, account for the worst case :
+	 * - 3 blocks overwritten: target leaf, ptrtbl block, header block
+	 * - 4 new blocks written if adding:
+	 * 	- 2 blocks for possibly split leaves,
+	 * 	- 2 grown ptrtbl blocks
+	 *
+	 * This also accomodates the case where an add operation to a fairly
+	 * large microzap results in a promotion to fatzap.
+	 */
+	if (name == NULL) {
+		*towrite += (3 + (add ? 4 : 0)) * SPA_MAXBLOCKSIZE;
+		return (err);
+	}
+
+	/*
+	 * We lock the zap with adding ==  FALSE. Because, if we pass
+	 * the actual value of add, it could trigger a mzap_upgrade().
+	 * At present we are just evaluating the possibility of this operation
+	 * and hence we donot want to trigger an upgrade.
+	 */
+	err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
+	if (err)
+		return (err);
+
+	if (!zap->zap_ismicro) {
+		zap_name_t *zn = zap_name_alloc(zap, name, MT_EXACT);
+		if (zn) {
+			err = fzap_count_write(zn, add, towrite,
+			    tooverwrite);
+			zap_name_free(zn);
+		} else {
+			/*
+			 * We treat this case as similar to (name == NULL)
+			 */
+			*towrite += (3 + (add ? 4 : 0)) * SPA_MAXBLOCKSIZE;
+		}
+	} else {
+		/*
+		 * We are here if (name != NULL) and this is a micro-zap.
+		 * We account for the header block depending on whether it
+		 * is freeable.
+		 *
+		 * Incase of an add-operation it is hard to find out
+		 * if this add will promote this microzap to fatzap.
+		 * Hence, we consider the worst case and account for the
+		 * blocks assuming this microzap would be promoted to a
+		 * fatzap.
+		 *
+		 * 1 block overwritten  : header block
+		 * 4 new blocks written : 2 new split leaf, 2 grown
+		 *			ptrtbl blocks
+		 */
+		if (dmu_buf_freeable(zap->zap_dbuf))
+			*tooverwrite += SPA_MAXBLOCKSIZE;
+		else
+			*towrite += SPA_MAXBLOCKSIZE;
+
+		if (add) {
+			*towrite += 4 * SPA_MAXBLOCKSIZE;
+		}
+	}
+
+	zap_unlockdir(zap);
+	return (err);
+}
diff --git a/uts/common/fs/zfs/zfs.conf b/uts/common/fs/zfs/zfs.conf
new file mode 100644
index 000000000000..09881909b804
--- /dev/null
+++ b/uts/common/fs/zfs/zfs.conf
@@ -0,0 +1,28 @@
+#
+# CDDL HEADER START
+#
+# The contents of this file are subject to the terms of the
+# Common Development and Distribution License, Version 1.0 only
+# (the "License").  You may not use this file except in compliance
+# with the License.
+#
+# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+# or http://www.opensolaris.org/os/licensing.
+# See the License for the specific language governing permissions
+# and limitations under the License.
+#
+# When distributing Covered Code, include this CDDL HEADER in each
+# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+# If applicable, add the following below this CDDL HEADER, with the
+# fields enclosed by brackets "[]" replaced with your own identifying
+# information: Portions Copyright [yyyy] [name of copyright owner]
+#
+# CDDL HEADER END
+#
+#
+# Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+# Use is subject to license terms.
+#
+# ident	"%Z%%M%	%I%	%E% SMI"
+#
+name="zfs" parent="pseudo";
diff --git a/uts/common/fs/zfs/zfs_acl.c b/uts/common/fs/zfs/zfs_acl.c
new file mode 100644
index 000000000000..843b5ff06ef4
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_acl.c
@@ -0,0 +1,2748 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/resource.h>
+#include <sys/vfs.h>
+#include <sys/vnode.h>
+#include <sys/sid.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/kmem.h>
+#include <sys/cmn_err.h>
+#include <sys/errno.h>
+#include <sys/unistd.h>
+#include <sys/sdt.h>
+#include <sys/fs/zfs.h>
+#include <sys/mode.h>
+#include <sys/policy.h>
+#include <sys/zfs_znode.h>
+#include <sys/zfs_fuid.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_dir.h>
+#include <sys/zfs_vfsops.h>
+#include <sys/dmu.h>
+#include <sys/dnode.h>
+#include <sys/zap.h>
+#include <sys/sa.h>
+#include "fs/fs_subr.h"
+#include <acl/acl_common.h>
+
+#define	ALLOW	ACE_ACCESS_ALLOWED_ACE_TYPE
+#define	DENY	ACE_ACCESS_DENIED_ACE_TYPE
+#define	MAX_ACE_TYPE	ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE
+#define	MIN_ACE_TYPE	ALLOW
+
+#define	OWNING_GROUP		(ACE_GROUP|ACE_IDENTIFIER_GROUP)
+#define	EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \
+    ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE)
+#define	EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \
+    ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
+#define	OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \
+    ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS)
+
+#define	ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \
+    ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \
+    ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \
+    ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE)
+
+#define	WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS)
+#define	WRITE_MASK_ATTRS (ACE_WRITE_ACL|ACE_WRITE_OWNER|ACE_WRITE_ATTRIBUTES| \
+    ACE_DELETE|ACE_DELETE_CHILD)
+#define	WRITE_MASK (WRITE_MASK_DATA|WRITE_MASK_ATTRS)
+
+#define	OGE_CLEAR	(ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
+    ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
+
+#define	OKAY_MASK_BITS (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
+    ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE)
+
+#define	ALL_INHERIT	(ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE | \
+    ACE_NO_PROPAGATE_INHERIT_ACE|ACE_INHERIT_ONLY_ACE|ACE_INHERITED_ACE)
+
+#define	RESTRICTED_CLEAR	(ACE_WRITE_ACL|ACE_WRITE_OWNER)
+
+#define	V4_ACL_WIDE_FLAGS (ZFS_ACL_AUTO_INHERIT|ZFS_ACL_DEFAULTED|\
+    ZFS_ACL_PROTECTED)
+
+#define	ZFS_ACL_WIDE_FLAGS (V4_ACL_WIDE_FLAGS|ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|\
+    ZFS_ACL_OBJ_ACE)
+
+#define	ALL_MODE_EXECS (S_IXUSR | S_IXGRP | S_IXOTH)
+
+static uint16_t
+zfs_ace_v0_get_type(void *acep)
+{
+	return (((zfs_oldace_t *)acep)->z_type);
+}
+
+static uint16_t
+zfs_ace_v0_get_flags(void *acep)
+{
+	return (((zfs_oldace_t *)acep)->z_flags);
+}
+
+static uint32_t
+zfs_ace_v0_get_mask(void *acep)
+{
+	return (((zfs_oldace_t *)acep)->z_access_mask);
+}
+
+static uint64_t
+zfs_ace_v0_get_who(void *acep)
+{
+	return (((zfs_oldace_t *)acep)->z_fuid);
+}
+
+static void
+zfs_ace_v0_set_type(void *acep, uint16_t type)
+{
+	((zfs_oldace_t *)acep)->z_type = type;
+}
+
+static void
+zfs_ace_v0_set_flags(void *acep, uint16_t flags)
+{
+	((zfs_oldace_t *)acep)->z_flags = flags;
+}
+
+static void
+zfs_ace_v0_set_mask(void *acep, uint32_t mask)
+{
+	((zfs_oldace_t *)acep)->z_access_mask = mask;
+}
+
+static void
+zfs_ace_v0_set_who(void *acep, uint64_t who)
+{
+	((zfs_oldace_t *)acep)->z_fuid = who;
+}
+
+/*ARGSUSED*/
+static size_t
+zfs_ace_v0_size(void *acep)
+{
+	return (sizeof (zfs_oldace_t));
+}
+
+static size_t
+zfs_ace_v0_abstract_size(void)
+{
+	return (sizeof (zfs_oldace_t));
+}
+
+static int
+zfs_ace_v0_mask_off(void)
+{
+	return (offsetof(zfs_oldace_t, z_access_mask));
+}
+
+/*ARGSUSED*/
+static int
+zfs_ace_v0_data(void *acep, void **datap)
+{
+	*datap = NULL;
+	return (0);
+}
+
+static acl_ops_t zfs_acl_v0_ops = {
+	zfs_ace_v0_get_mask,
+	zfs_ace_v0_set_mask,
+	zfs_ace_v0_get_flags,
+	zfs_ace_v0_set_flags,
+	zfs_ace_v0_get_type,
+	zfs_ace_v0_set_type,
+	zfs_ace_v0_get_who,
+	zfs_ace_v0_set_who,
+	zfs_ace_v0_size,
+	zfs_ace_v0_abstract_size,
+	zfs_ace_v0_mask_off,
+	zfs_ace_v0_data
+};
+
+static uint16_t
+zfs_ace_fuid_get_type(void *acep)
+{
+	return (((zfs_ace_hdr_t *)acep)->z_type);
+}
+
+static uint16_t
+zfs_ace_fuid_get_flags(void *acep)
+{
+	return (((zfs_ace_hdr_t *)acep)->z_flags);
+}
+
+static uint32_t
+zfs_ace_fuid_get_mask(void *acep)
+{
+	return (((zfs_ace_hdr_t *)acep)->z_access_mask);
+}
+
+static uint64_t
+zfs_ace_fuid_get_who(void *args)
+{
+	uint16_t entry_type;
+	zfs_ace_t *acep = args;
+
+	entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
+
+	if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
+	    entry_type == ACE_EVERYONE)
+		return (-1);
+	return (((zfs_ace_t *)acep)->z_fuid);
+}
+
+static void
+zfs_ace_fuid_set_type(void *acep, uint16_t type)
+{
+	((zfs_ace_hdr_t *)acep)->z_type = type;
+}
+
+static void
+zfs_ace_fuid_set_flags(void *acep, uint16_t flags)
+{
+	((zfs_ace_hdr_t *)acep)->z_flags = flags;
+}
+
+static void
+zfs_ace_fuid_set_mask(void *acep, uint32_t mask)
+{
+	((zfs_ace_hdr_t *)acep)->z_access_mask = mask;
+}
+
+static void
+zfs_ace_fuid_set_who(void *arg, uint64_t who)
+{
+	zfs_ace_t *acep = arg;
+
+	uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS;
+
+	if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP ||
+	    entry_type == ACE_EVERYONE)
+		return;
+	acep->z_fuid = who;
+}
+
+static size_t
+zfs_ace_fuid_size(void *acep)
+{
+	zfs_ace_hdr_t *zacep = acep;
+	uint16_t entry_type;
+
+	switch (zacep->z_type) {
+	case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+	case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+	case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+	case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+		return (sizeof (zfs_object_ace_t));
+	case ALLOW:
+	case DENY:
+		entry_type =
+		    (((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS);
+		if (entry_type == ACE_OWNER ||
+		    entry_type == OWNING_GROUP ||
+		    entry_type == ACE_EVERYONE)
+			return (sizeof (zfs_ace_hdr_t));
+		/*FALLTHROUGH*/
+	default:
+		return (sizeof (zfs_ace_t));
+	}
+}
+
+static size_t
+zfs_ace_fuid_abstract_size(void)
+{
+	return (sizeof (zfs_ace_hdr_t));
+}
+
+static int
+zfs_ace_fuid_mask_off(void)
+{
+	return (offsetof(zfs_ace_hdr_t, z_access_mask));
+}
+
+static int
+zfs_ace_fuid_data(void *acep, void **datap)
+{
+	zfs_ace_t *zacep = acep;
+	zfs_object_ace_t *zobjp;
+
+	switch (zacep->z_hdr.z_type) {
+	case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+	case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+	case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+	case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+		zobjp = acep;
+		*datap = (caddr_t)zobjp + sizeof (zfs_ace_t);
+		return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t));
+	default:
+		*datap = NULL;
+		return (0);
+	}
+}
+
+static acl_ops_t zfs_acl_fuid_ops = {
+	zfs_ace_fuid_get_mask,
+	zfs_ace_fuid_set_mask,
+	zfs_ace_fuid_get_flags,
+	zfs_ace_fuid_set_flags,
+	zfs_ace_fuid_get_type,
+	zfs_ace_fuid_set_type,
+	zfs_ace_fuid_get_who,
+	zfs_ace_fuid_set_who,
+	zfs_ace_fuid_size,
+	zfs_ace_fuid_abstract_size,
+	zfs_ace_fuid_mask_off,
+	zfs_ace_fuid_data
+};
+
+/*
+ * The following three functions are provided for compatibility with
+ * older ZPL version in order to determine if the file use to have
+ * an external ACL and what version of ACL previously existed on the
+ * file.  Would really be nice to not need this, sigh.
+ */
+uint64_t
+zfs_external_acl(znode_t *zp)
+{
+	zfs_acl_phys_t acl_phys;
+	int error;
+
+	if (zp->z_is_sa)
+		return (0);
+
+	/*
+	 * Need to deal with a potential
+	 * race where zfs_sa_upgrade could cause
+	 * z_isa_sa to change.
+	 *
+	 * If the lookup fails then the state of z_is_sa should have
+	 * changed.
+	 */
+
+	if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zp->z_zfsvfs),
+	    &acl_phys, sizeof (acl_phys))) == 0)
+		return (acl_phys.z_acl_extern_obj);
+	else {
+		/*
+		 * after upgrade the SA_ZPL_ZNODE_ACL should have been
+		 * removed
+		 */
+		VERIFY(zp->z_is_sa && error == ENOENT);
+		return (0);
+	}
+}
+
+/*
+ * Determine size of ACL in bytes
+ *
+ * This is more complicated than it should be since we have to deal
+ * with old external ACLs.
+ */
+static int
+zfs_acl_znode_info(znode_t *zp, int *aclsize, int *aclcount,
+    zfs_acl_phys_t *aclphys)
+{
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	uint64_t acl_count;
+	int size;
+	int error;
+
+	ASSERT(MUTEX_HELD(&zp->z_acl_lock));
+	if (zp->z_is_sa) {
+		if ((error = sa_size(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zfsvfs),
+		    &size)) != 0)
+			return (error);
+		*aclsize = size;
+		if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_COUNT(zfsvfs),
+		    &acl_count, sizeof (acl_count))) != 0)
+			return (error);
+		*aclcount = acl_count;
+	} else {
+		if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zfsvfs),
+		    aclphys, sizeof (*aclphys))) != 0)
+			return (error);
+
+		if (aclphys->z_acl_version == ZFS_ACL_VERSION_INITIAL) {
+			*aclsize = ZFS_ACL_SIZE(aclphys->z_acl_size);
+			*aclcount = aclphys->z_acl_size;
+		} else {
+			*aclsize = aclphys->z_acl_size;
+			*aclcount = aclphys->z_acl_count;
+		}
+	}
+	return (0);
+}
+
+int
+zfs_znode_acl_version(znode_t *zp)
+{
+	zfs_acl_phys_t acl_phys;
+
+	if (zp->z_is_sa)
+		return (ZFS_ACL_VERSION_FUID);
+	else {
+		int error;
+
+		/*
+		 * Need to deal with a potential
+		 * race where zfs_sa_upgrade could cause
+		 * z_isa_sa to change.
+		 *
+		 * If the lookup fails then the state of z_is_sa should have
+		 * changed.
+		 */
+		if ((error = sa_lookup(zp->z_sa_hdl,
+		    SA_ZPL_ZNODE_ACL(zp->z_zfsvfs),
+		    &acl_phys, sizeof (acl_phys))) == 0)
+			return (acl_phys.z_acl_version);
+		else {
+			/*
+			 * After upgrade SA_ZPL_ZNODE_ACL should have
+			 * been removed.
+			 */
+			VERIFY(zp->z_is_sa && error == ENOENT);
+			return (ZFS_ACL_VERSION_FUID);
+		}
+	}
+}
+
+static int
+zfs_acl_version(int version)
+{
+	if (version < ZPL_VERSION_FUID)
+		return (ZFS_ACL_VERSION_INITIAL);
+	else
+		return (ZFS_ACL_VERSION_FUID);
+}
+
+static int
+zfs_acl_version_zp(znode_t *zp)
+{
+	return (zfs_acl_version(zp->z_zfsvfs->z_version));
+}
+
+zfs_acl_t *
+zfs_acl_alloc(int vers)
+{
+	zfs_acl_t *aclp;
+
+	aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_SLEEP);
+	list_create(&aclp->z_acl, sizeof (zfs_acl_node_t),
+	    offsetof(zfs_acl_node_t, z_next));
+	aclp->z_version = vers;
+	if (vers == ZFS_ACL_VERSION_FUID)
+		aclp->z_ops = zfs_acl_fuid_ops;
+	else
+		aclp->z_ops = zfs_acl_v0_ops;
+	return (aclp);
+}
+
+zfs_acl_node_t *
+zfs_acl_node_alloc(size_t bytes)
+{
+	zfs_acl_node_t *aclnode;
+
+	aclnode = kmem_zalloc(sizeof (zfs_acl_node_t), KM_SLEEP);
+	if (bytes) {
+		aclnode->z_acldata = kmem_alloc(bytes, KM_SLEEP);
+		aclnode->z_allocdata = aclnode->z_acldata;
+		aclnode->z_allocsize = bytes;
+		aclnode->z_size = bytes;
+	}
+
+	return (aclnode);
+}
+
+static void
+zfs_acl_node_free(zfs_acl_node_t *aclnode)
+{
+	if (aclnode->z_allocsize)
+		kmem_free(aclnode->z_allocdata, aclnode->z_allocsize);
+	kmem_free(aclnode, sizeof (zfs_acl_node_t));
+}
+
+static void
+zfs_acl_release_nodes(zfs_acl_t *aclp)
+{
+	zfs_acl_node_t *aclnode;
+
+	while (aclnode = list_head(&aclp->z_acl)) {
+		list_remove(&aclp->z_acl, aclnode);
+		zfs_acl_node_free(aclnode);
+	}
+	aclp->z_acl_count = 0;
+	aclp->z_acl_bytes = 0;
+}
+
+void
+zfs_acl_free(zfs_acl_t *aclp)
+{
+	zfs_acl_release_nodes(aclp);
+	list_destroy(&aclp->z_acl);
+	kmem_free(aclp, sizeof (zfs_acl_t));
+}
+
+static boolean_t
+zfs_acl_valid_ace_type(uint_t type, uint_t flags)
+{
+	uint16_t entry_type;
+
+	switch (type) {
+	case ALLOW:
+	case DENY:
+	case ACE_SYSTEM_AUDIT_ACE_TYPE:
+	case ACE_SYSTEM_ALARM_ACE_TYPE:
+		entry_type = flags & ACE_TYPE_FLAGS;
+		return (entry_type == ACE_OWNER ||
+		    entry_type == OWNING_GROUP ||
+		    entry_type == ACE_EVERYONE || entry_type == 0 ||
+		    entry_type == ACE_IDENTIFIER_GROUP);
+	default:
+		if (type >= MIN_ACE_TYPE && type <= MAX_ACE_TYPE)
+			return (B_TRUE);
+	}
+	return (B_FALSE);
+}
+
+static boolean_t
+zfs_ace_valid(vtype_t obj_type, zfs_acl_t *aclp, uint16_t type, uint16_t iflags)
+{
+	/*
+	 * first check type of entry
+	 */
+
+	if (!zfs_acl_valid_ace_type(type, iflags))
+		return (B_FALSE);
+
+	switch (type) {
+	case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+	case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+	case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+	case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+		if (aclp->z_version < ZFS_ACL_VERSION_FUID)
+			return (B_FALSE);
+		aclp->z_hints |= ZFS_ACL_OBJ_ACE;
+	}
+
+	/*
+	 * next check inheritance level flags
+	 */
+
+	if (obj_type == VDIR &&
+	    (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE)))
+		aclp->z_hints |= ZFS_INHERIT_ACE;
+
+	if (iflags & (ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE)) {
+		if ((iflags & (ACE_FILE_INHERIT_ACE|
+		    ACE_DIRECTORY_INHERIT_ACE)) == 0) {
+			return (B_FALSE);
+		}
+	}
+
+	return (B_TRUE);
+}
+
+static void *
+zfs_acl_next_ace(zfs_acl_t *aclp, void *start, uint64_t *who,
+    uint32_t *access_mask, uint16_t *iflags, uint16_t *type)
+{
+	zfs_acl_node_t *aclnode;
+
+	ASSERT(aclp);
+
+	if (start == NULL) {
+		aclnode = list_head(&aclp->z_acl);
+		if (aclnode == NULL)
+			return (NULL);
+
+		aclp->z_next_ace = aclnode->z_acldata;
+		aclp->z_curr_node = aclnode;
+		aclnode->z_ace_idx = 0;
+	}
+
+	aclnode = aclp->z_curr_node;
+
+	if (aclnode == NULL)
+		return (NULL);
+
+	if (aclnode->z_ace_idx >= aclnode->z_ace_count) {
+		aclnode = list_next(&aclp->z_acl, aclnode);
+		if (aclnode == NULL)
+			return (NULL);
+		else {
+			aclp->z_curr_node = aclnode;
+			aclnode->z_ace_idx = 0;
+			aclp->z_next_ace = aclnode->z_acldata;
+		}
+	}
+
+	if (aclnode->z_ace_idx < aclnode->z_ace_count) {
+		void *acep = aclp->z_next_ace;
+		size_t ace_size;
+
+		/*
+		 * Make sure we don't overstep our bounds
+		 */
+		ace_size = aclp->z_ops.ace_size(acep);
+
+		if (((caddr_t)acep + ace_size) >
+		    ((caddr_t)aclnode->z_acldata + aclnode->z_size)) {
+			return (NULL);
+		}
+
+		*iflags = aclp->z_ops.ace_flags_get(acep);
+		*type = aclp->z_ops.ace_type_get(acep);
+		*access_mask = aclp->z_ops.ace_mask_get(acep);
+		*who = aclp->z_ops.ace_who_get(acep);
+		aclp->z_next_ace = (caddr_t)aclp->z_next_ace + ace_size;
+		aclnode->z_ace_idx++;
+
+		return ((void *)acep);
+	}
+	return (NULL);
+}
+
+/*ARGSUSED*/
+static uint64_t
+zfs_ace_walk(void *datap, uint64_t cookie, int aclcnt,
+    uint16_t *flags, uint16_t *type, uint32_t *mask)
+{
+	zfs_acl_t *aclp = datap;
+	zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)(uintptr_t)cookie;
+	uint64_t who;
+
+	acep = zfs_acl_next_ace(aclp, acep, &who, mask,
+	    flags, type);
+	return ((uint64_t)(uintptr_t)acep);
+}
+
+static zfs_acl_node_t *
+zfs_acl_curr_node(zfs_acl_t *aclp)
+{
+	ASSERT(aclp->z_curr_node);
+	return (aclp->z_curr_node);
+}
+
+/*
+ * Copy ACE to internal ZFS format.
+ * While processing the ACL each ACE will be validated for correctness.
+ * ACE FUIDs will be created later.
+ */
+int
+zfs_copy_ace_2_fuid(zfsvfs_t *zfsvfs, vtype_t obj_type, zfs_acl_t *aclp,
+    void *datap, zfs_ace_t *z_acl, uint64_t aclcnt, size_t *size,
+    zfs_fuid_info_t **fuidp, cred_t *cr)
+{
+	int i;
+	uint16_t entry_type;
+	zfs_ace_t *aceptr = z_acl;
+	ace_t *acep = datap;
+	zfs_object_ace_t *zobjacep;
+	ace_object_t *aceobjp;
+
+	for (i = 0; i != aclcnt; i++) {
+		aceptr->z_hdr.z_access_mask = acep->a_access_mask;
+		aceptr->z_hdr.z_flags = acep->a_flags;
+		aceptr->z_hdr.z_type = acep->a_type;
+		entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS;
+		if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP &&
+		    entry_type != ACE_EVERYONE) {
+			aceptr->z_fuid = zfs_fuid_create(zfsvfs, acep->a_who,
+			    cr, (entry_type == 0) ?
+			    ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp);
+		}
+
+		/*
+		 * Make sure ACE is valid
+		 */
+		if (zfs_ace_valid(obj_type, aclp, aceptr->z_hdr.z_type,
+		    aceptr->z_hdr.z_flags) != B_TRUE)
+			return (EINVAL);
+
+		switch (acep->a_type) {
+		case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+		case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+		case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+		case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+			zobjacep = (zfs_object_ace_t *)aceptr;
+			aceobjp = (ace_object_t *)acep;
+
+			bcopy(aceobjp->a_obj_type, zobjacep->z_object_type,
+			    sizeof (aceobjp->a_obj_type));
+			bcopy(aceobjp->a_inherit_obj_type,
+			    zobjacep->z_inherit_type,
+			    sizeof (aceobjp->a_inherit_obj_type));
+			acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t));
+			break;
+		default:
+			acep = (ace_t *)((caddr_t)acep + sizeof (ace_t));
+		}
+
+		aceptr = (zfs_ace_t *)((caddr_t)aceptr +
+		    aclp->z_ops.ace_size(aceptr));
+	}
+
+	*size = (caddr_t)aceptr - (caddr_t)z_acl;
+
+	return (0);
+}
+
+/*
+ * Copy ZFS ACEs to fixed size ace_t layout
+ */
+static void
+zfs_copy_fuid_2_ace(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, cred_t *cr,
+    void *datap, int filter)
+{
+	uint64_t who;
+	uint32_t access_mask;
+	uint16_t iflags, type;
+	zfs_ace_hdr_t *zacep = NULL;
+	ace_t *acep = datap;
+	ace_object_t *objacep;
+	zfs_object_ace_t *zobjacep;
+	size_t ace_size;
+	uint16_t entry_type;
+
+	while (zacep = zfs_acl_next_ace(aclp, zacep,
+	    &who, &access_mask, &iflags, &type)) {
+
+		switch (type) {
+		case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+		case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+		case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+		case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+			if (filter) {
+				continue;
+			}
+			zobjacep = (zfs_object_ace_t *)zacep;
+			objacep = (ace_object_t *)acep;
+			bcopy(zobjacep->z_object_type,
+			    objacep->a_obj_type,
+			    sizeof (zobjacep->z_object_type));
+			bcopy(zobjacep->z_inherit_type,
+			    objacep->a_inherit_obj_type,
+			    sizeof (zobjacep->z_inherit_type));
+			ace_size = sizeof (ace_object_t);
+			break;
+		default:
+			ace_size = sizeof (ace_t);
+			break;
+		}
+
+		entry_type = (iflags & ACE_TYPE_FLAGS);
+		if ((entry_type != ACE_OWNER &&
+		    entry_type != OWNING_GROUP &&
+		    entry_type != ACE_EVERYONE)) {
+			acep->a_who = zfs_fuid_map_id(zfsvfs, who,
+			    cr, (entry_type & ACE_IDENTIFIER_GROUP) ?
+			    ZFS_ACE_GROUP : ZFS_ACE_USER);
+		} else {
+			acep->a_who = (uid_t)(int64_t)who;
+		}
+		acep->a_access_mask = access_mask;
+		acep->a_flags = iflags;
+		acep->a_type = type;
+		acep = (ace_t *)((caddr_t)acep + ace_size);
+	}
+}
+
+static int
+zfs_copy_ace_2_oldace(vtype_t obj_type, zfs_acl_t *aclp, ace_t *acep,
+    zfs_oldace_t *z_acl, int aclcnt, size_t *size)
+{
+	int i;
+	zfs_oldace_t *aceptr = z_acl;
+
+	for (i = 0; i != aclcnt; i++, aceptr++) {
+		aceptr->z_access_mask = acep[i].a_access_mask;
+		aceptr->z_type = acep[i].a_type;
+		aceptr->z_flags = acep[i].a_flags;
+		aceptr->z_fuid = acep[i].a_who;
+		/*
+		 * Make sure ACE is valid
+		 */
+		if (zfs_ace_valid(obj_type, aclp, aceptr->z_type,
+		    aceptr->z_flags) != B_TRUE)
+			return (EINVAL);
+	}
+	*size = (caddr_t)aceptr - (caddr_t)z_acl;
+	return (0);
+}
+
+/*
+ * convert old ACL format to new
+ */
+void
+zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp, cred_t *cr)
+{
+	zfs_oldace_t *oldaclp;
+	int i;
+	uint16_t type, iflags;
+	uint32_t access_mask;
+	uint64_t who;
+	void *cookie = NULL;
+	zfs_acl_node_t *newaclnode;
+
+	ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL);
+	/*
+	 * First create the ACE in a contiguous piece of memory
+	 * for zfs_copy_ace_2_fuid().
+	 *
+	 * We only convert an ACL once, so this won't happen
+	 * everytime.
+	 */
+	oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count,
+	    KM_SLEEP);
+	i = 0;
+	while (cookie = zfs_acl_next_ace(aclp, cookie, &who,
+	    &access_mask, &iflags, &type)) {
+		oldaclp[i].z_flags = iflags;
+		oldaclp[i].z_type = type;
+		oldaclp[i].z_fuid = who;
+		oldaclp[i++].z_access_mask = access_mask;
+	}
+
+	newaclnode = zfs_acl_node_alloc(aclp->z_acl_count *
+	    sizeof (zfs_object_ace_t));
+	aclp->z_ops = zfs_acl_fuid_ops;
+	VERIFY(zfs_copy_ace_2_fuid(zp->z_zfsvfs, ZTOV(zp)->v_type, aclp,
+	    oldaclp, newaclnode->z_acldata, aclp->z_acl_count,
+	    &newaclnode->z_size, NULL, cr) == 0);
+	newaclnode->z_ace_count = aclp->z_acl_count;
+	aclp->z_version = ZFS_ACL_VERSION;
+	kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t));
+
+	/*
+	 * Release all previous ACL nodes
+	 */
+
+	zfs_acl_release_nodes(aclp);
+
+	list_insert_head(&aclp->z_acl, newaclnode);
+
+	aclp->z_acl_bytes = newaclnode->z_size;
+	aclp->z_acl_count = newaclnode->z_ace_count;
+
+}
+
+/*
+ * Convert unix access mask to v4 access mask
+ */
+static uint32_t
+zfs_unix_to_v4(uint32_t access_mask)
+{
+	uint32_t new_mask = 0;
+
+	if (access_mask & S_IXOTH)
+		new_mask |= ACE_EXECUTE;
+	if (access_mask & S_IWOTH)
+		new_mask |= ACE_WRITE_DATA;
+	if (access_mask & S_IROTH)
+		new_mask |= ACE_READ_DATA;
+	return (new_mask);
+}
+
+static void
+zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask,
+    uint16_t access_type, uint64_t fuid, uint16_t entry_type)
+{
+	uint16_t type = entry_type & ACE_TYPE_FLAGS;
+
+	aclp->z_ops.ace_mask_set(acep, access_mask);
+	aclp->z_ops.ace_type_set(acep, access_type);
+	aclp->z_ops.ace_flags_set(acep, entry_type);
+	if ((type != ACE_OWNER && type != OWNING_GROUP &&
+	    type != ACE_EVERYONE))
+		aclp->z_ops.ace_who_set(acep, fuid);
+}
+
+/*
+ * Determine mode of file based on ACL.
+ * Also, create FUIDs for any User/Group ACEs
+ */
+uint64_t
+zfs_mode_compute(uint64_t fmode, zfs_acl_t *aclp,
+    uint64_t *pflags, uint64_t fuid, uint64_t fgid)
+{
+	int		entry_type;
+	mode_t		mode;
+	mode_t		seen = 0;
+	zfs_ace_hdr_t 	*acep = NULL;
+	uint64_t	who;
+	uint16_t	iflags, type;
+	uint32_t	access_mask;
+	boolean_t	an_exec_denied = B_FALSE;
+
+	mode = (fmode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX));
+
+	while (acep = zfs_acl_next_ace(aclp, acep, &who,
+	    &access_mask, &iflags, &type)) {
+
+		if (!zfs_acl_valid_ace_type(type, iflags))
+			continue;
+
+		entry_type = (iflags & ACE_TYPE_FLAGS);
+
+		/*
+		 * Skip over owner@, group@ or everyone@ inherit only ACEs
+		 */
+		if ((iflags & ACE_INHERIT_ONLY_ACE) &&
+		    (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
+		    entry_type == OWNING_GROUP))
+			continue;
+
+		if (entry_type == ACE_OWNER || (entry_type == 0 &&
+		    who == fuid)) {
+			if ((access_mask & ACE_READ_DATA) &&
+			    (!(seen & S_IRUSR))) {
+				seen |= S_IRUSR;
+				if (type == ALLOW) {
+					mode |= S_IRUSR;
+				}
+			}
+			if ((access_mask & ACE_WRITE_DATA) &&
+			    (!(seen & S_IWUSR))) {
+				seen |= S_IWUSR;
+				if (type == ALLOW) {
+					mode |= S_IWUSR;
+				}
+			}
+			if ((access_mask & ACE_EXECUTE) &&
+			    (!(seen & S_IXUSR))) {
+				seen |= S_IXUSR;
+				if (type == ALLOW) {
+					mode |= S_IXUSR;
+				}
+			}
+		} else if (entry_type == OWNING_GROUP ||
+		    (entry_type == ACE_IDENTIFIER_GROUP && who == fgid)) {
+			if ((access_mask & ACE_READ_DATA) &&
+			    (!(seen & S_IRGRP))) {
+				seen |= S_IRGRP;
+				if (type == ALLOW) {
+					mode |= S_IRGRP;
+				}
+			}
+			if ((access_mask & ACE_WRITE_DATA) &&
+			    (!(seen & S_IWGRP))) {
+				seen |= S_IWGRP;
+				if (type == ALLOW) {
+					mode |= S_IWGRP;
+				}
+			}
+			if ((access_mask & ACE_EXECUTE) &&
+			    (!(seen & S_IXGRP))) {
+				seen |= S_IXGRP;
+				if (type == ALLOW) {
+					mode |= S_IXGRP;
+				}
+			}
+		} else if (entry_type == ACE_EVERYONE) {
+			if ((access_mask & ACE_READ_DATA)) {
+				if (!(seen & S_IRUSR)) {
+					seen |= S_IRUSR;
+					if (type == ALLOW) {
+						mode |= S_IRUSR;
+					}
+				}
+				if (!(seen & S_IRGRP)) {
+					seen |= S_IRGRP;
+					if (type == ALLOW) {
+						mode |= S_IRGRP;
+					}
+				}
+				if (!(seen & S_IROTH)) {
+					seen |= S_IROTH;
+					if (type == ALLOW) {
+						mode |= S_IROTH;
+					}
+				}
+			}
+			if ((access_mask & ACE_WRITE_DATA)) {
+				if (!(seen & S_IWUSR)) {
+					seen |= S_IWUSR;
+					if (type == ALLOW) {
+						mode |= S_IWUSR;
+					}
+				}
+				if (!(seen & S_IWGRP)) {
+					seen |= S_IWGRP;
+					if (type == ALLOW) {
+						mode |= S_IWGRP;
+					}
+				}
+				if (!(seen & S_IWOTH)) {
+					seen |= S_IWOTH;
+					if (type == ALLOW) {
+						mode |= S_IWOTH;
+					}
+				}
+			}
+			if ((access_mask & ACE_EXECUTE)) {
+				if (!(seen & S_IXUSR)) {
+					seen |= S_IXUSR;
+					if (type == ALLOW) {
+						mode |= S_IXUSR;
+					}
+				}
+				if (!(seen & S_IXGRP)) {
+					seen |= S_IXGRP;
+					if (type == ALLOW) {
+						mode |= S_IXGRP;
+					}
+				}
+				if (!(seen & S_IXOTH)) {
+					seen |= S_IXOTH;
+					if (type == ALLOW) {
+						mode |= S_IXOTH;
+					}
+				}
+			}
+		} else {
+			/*
+			 * Only care if this IDENTIFIER_GROUP or
+			 * USER ACE denies execute access to someone,
+			 * mode is not affected
+			 */
+			if ((access_mask & ACE_EXECUTE) && type == DENY)
+				an_exec_denied = B_TRUE;
+		}
+	}
+
+	/*
+	 * Failure to allow is effectively a deny, so execute permission
+	 * is denied if it was never mentioned or if we explicitly
+	 * weren't allowed it.
+	 */
+	if (!an_exec_denied &&
+	    ((seen & ALL_MODE_EXECS) != ALL_MODE_EXECS ||
+	    (mode & ALL_MODE_EXECS) != ALL_MODE_EXECS))
+		an_exec_denied = B_TRUE;
+
+	if (an_exec_denied)
+		*pflags &= ~ZFS_NO_EXECS_DENIED;
+	else
+		*pflags |= ZFS_NO_EXECS_DENIED;
+
+	return (mode);
+}
+
+/*
+ * Read an external acl object.  If the intent is to modify, always
+ * create a new acl and leave any cached acl in place.
+ */
+static int
+zfs_acl_node_read(znode_t *zp, boolean_t have_lock, zfs_acl_t **aclpp,
+    boolean_t will_modify)
+{
+	zfs_acl_t	*aclp;
+	int		aclsize;
+	int		acl_count;
+	zfs_acl_node_t	*aclnode;
+	zfs_acl_phys_t	znode_acl;
+	int		version;
+	int		error;
+	boolean_t	drop_lock = B_FALSE;
+
+	ASSERT(MUTEX_HELD(&zp->z_acl_lock));
+
+	if (zp->z_acl_cached && !will_modify) {
+		*aclpp = zp->z_acl_cached;
+		return (0);
+	}
+
+	/*
+	 * close race where znode could be upgrade while trying to
+	 * read the znode attributes.
+	 *
+	 * But this could only happen if the file isn't already an SA
+	 * znode
+	 */
+	if (!zp->z_is_sa && !have_lock) {
+		mutex_enter(&zp->z_lock);
+		drop_lock = B_TRUE;
+	}
+	version = zfs_znode_acl_version(zp);
+
+	if ((error = zfs_acl_znode_info(zp, &aclsize,
+	    &acl_count, &znode_acl)) != 0) {
+		goto done;
+	}
+
+	aclp = zfs_acl_alloc(version);
+
+	aclp->z_acl_count = acl_count;
+	aclp->z_acl_bytes = aclsize;
+
+	aclnode = zfs_acl_node_alloc(aclsize);
+	aclnode->z_ace_count = aclp->z_acl_count;
+	aclnode->z_size = aclsize;
+
+	if (!zp->z_is_sa) {
+		if (znode_acl.z_acl_extern_obj) {
+			error = dmu_read(zp->z_zfsvfs->z_os,
+			    znode_acl.z_acl_extern_obj, 0, aclnode->z_size,
+			    aclnode->z_acldata, DMU_READ_PREFETCH);
+		} else {
+			bcopy(znode_acl.z_ace_data, aclnode->z_acldata,
+			    aclnode->z_size);
+		}
+	} else {
+		error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zp->z_zfsvfs),
+		    aclnode->z_acldata, aclnode->z_size);
+	}
+
+	if (error != 0) {
+		zfs_acl_free(aclp);
+		zfs_acl_node_free(aclnode);
+		/* convert checksum errors into IO errors */
+		if (error == ECKSUM)
+			error = EIO;
+		goto done;
+	}
+
+	list_insert_head(&aclp->z_acl, aclnode);
+
+	*aclpp = aclp;
+	if (!will_modify)
+		zp->z_acl_cached = aclp;
+done:
+	if (drop_lock)
+		mutex_exit(&zp->z_lock);
+	return (error);
+}
+
+/*ARGSUSED*/
+void
+zfs_acl_data_locator(void **dataptr, uint32_t *length, uint32_t buflen,
+    boolean_t start, void *userdata)
+{
+	zfs_acl_locator_cb_t *cb = (zfs_acl_locator_cb_t *)userdata;
+
+	if (start) {
+		cb->cb_acl_node = list_head(&cb->cb_aclp->z_acl);
+	} else {
+		cb->cb_acl_node = list_next(&cb->cb_aclp->z_acl,
+		    cb->cb_acl_node);
+	}
+	*dataptr = cb->cb_acl_node->z_acldata;
+	*length = cb->cb_acl_node->z_size;
+}
+
+int
+zfs_acl_chown_setattr(znode_t *zp)
+{
+	int error;
+	zfs_acl_t *aclp;
+
+	ASSERT(MUTEX_HELD(&zp->z_lock));
+	ASSERT(MUTEX_HELD(&zp->z_acl_lock));
+
+	if ((error = zfs_acl_node_read(zp, B_TRUE, &aclp, B_FALSE)) == 0)
+		zp->z_mode = zfs_mode_compute(zp->z_mode, aclp,
+		    &zp->z_pflags, zp->z_uid, zp->z_gid);
+	return (error);
+}
+
+/*
+ * common code for setting ACLs.
+ *
+ * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl.
+ * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's
+ * already checked the acl and knows whether to inherit.
+ */
+int
+zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx)
+{
+	int			error;
+	zfsvfs_t		*zfsvfs = zp->z_zfsvfs;
+	dmu_object_type_t	otype;
+	zfs_acl_locator_cb_t	locate = { 0 };
+	uint64_t		mode;
+	sa_bulk_attr_t		bulk[5];
+	uint64_t		ctime[2];
+	int			count = 0;
+
+	mode = zp->z_mode;
+
+	mode = zfs_mode_compute(mode, aclp, &zp->z_pflags,
+	    zp->z_uid, zp->z_gid);
+
+	zp->z_mode = mode;
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
+	    &mode, sizeof (mode));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+	    &zp->z_pflags, sizeof (zp->z_pflags));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
+	    &ctime, sizeof (ctime));
+
+	if (zp->z_acl_cached) {
+		zfs_acl_free(zp->z_acl_cached);
+		zp->z_acl_cached = NULL;
+	}
+
+	/*
+	 * Upgrade needed?
+	 */
+	if (!zfsvfs->z_use_fuids) {
+		otype = DMU_OT_OLDACL;
+	} else {
+		if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) &&
+		    (zfsvfs->z_version >= ZPL_VERSION_FUID))
+			zfs_acl_xform(zp, aclp, cr);
+		ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
+		otype = DMU_OT_ACL;
+	}
+
+	/*
+	 * Arrgh, we have to handle old on disk format
+	 * as well as newer (preferred) SA format.
+	 */
+
+	if (zp->z_is_sa) { /* the easy case, just update the ACL attribute */
+		locate.cb_aclp = aclp;
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_ACES(zfsvfs),
+		    zfs_acl_data_locator, &locate, aclp->z_acl_bytes);
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_COUNT(zfsvfs),
+		    NULL, &aclp->z_acl_count, sizeof (uint64_t));
+	} else { /* Painful legacy way */
+		zfs_acl_node_t *aclnode;
+		uint64_t off = 0;
+		zfs_acl_phys_t acl_phys;
+		uint64_t aoid;
+
+		if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zfsvfs),
+		    &acl_phys, sizeof (acl_phys))) != 0)
+			return (error);
+
+		aoid = acl_phys.z_acl_extern_obj;
+
+		if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+			/*
+			 * If ACL was previously external and we are now
+			 * converting to new ACL format then release old
+			 * ACL object and create a new one.
+			 */
+			if (aoid &&
+			    aclp->z_version != acl_phys.z_acl_version) {
+				error = dmu_object_free(zfsvfs->z_os, aoid, tx);
+				if (error)
+					return (error);
+				aoid = 0;
+			}
+			if (aoid == 0) {
+				aoid = dmu_object_alloc(zfsvfs->z_os,
+				    otype, aclp->z_acl_bytes,
+				    otype == DMU_OT_ACL ?
+				    DMU_OT_SYSACL : DMU_OT_NONE,
+				    otype == DMU_OT_ACL ?
+				    DN_MAX_BONUSLEN : 0, tx);
+			} else {
+				(void) dmu_object_set_blocksize(zfsvfs->z_os,
+				    aoid, aclp->z_acl_bytes, 0, tx);
+			}
+			acl_phys.z_acl_extern_obj = aoid;
+			for (aclnode = list_head(&aclp->z_acl); aclnode;
+			    aclnode = list_next(&aclp->z_acl, aclnode)) {
+				if (aclnode->z_ace_count == 0)
+					continue;
+				dmu_write(zfsvfs->z_os, aoid, off,
+				    aclnode->z_size, aclnode->z_acldata, tx);
+				off += aclnode->z_size;
+			}
+		} else {
+			void *start = acl_phys.z_ace_data;
+			/*
+			 * Migrating back embedded?
+			 */
+			if (acl_phys.z_acl_extern_obj) {
+				error = dmu_object_free(zfsvfs->z_os,
+				    acl_phys.z_acl_extern_obj, tx);
+				if (error)
+					return (error);
+				acl_phys.z_acl_extern_obj = 0;
+			}
+
+			for (aclnode = list_head(&aclp->z_acl); aclnode;
+			    aclnode = list_next(&aclp->z_acl, aclnode)) {
+				if (aclnode->z_ace_count == 0)
+					continue;
+				bcopy(aclnode->z_acldata, start,
+				    aclnode->z_size);
+				start = (caddr_t)start + aclnode->z_size;
+			}
+		}
+		/*
+		 * If Old version then swap count/bytes to match old
+		 * layout of znode_acl_phys_t.
+		 */
+		if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
+			acl_phys.z_acl_size = aclp->z_acl_count;
+			acl_phys.z_acl_count = aclp->z_acl_bytes;
+		} else {
+			acl_phys.z_acl_size = aclp->z_acl_bytes;
+			acl_phys.z_acl_count = aclp->z_acl_count;
+		}
+		acl_phys.z_acl_version = aclp->z_version;
+
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
+		    &acl_phys, sizeof (acl_phys));
+	}
+
+	/*
+	 * Replace ACL wide bits, but first clear them.
+	 */
+	zp->z_pflags &= ~ZFS_ACL_WIDE_FLAGS;
+
+	zp->z_pflags |= aclp->z_hints;
+
+	if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
+		zp->z_pflags |= ZFS_ACL_TRIVIAL;
+
+	zfs_tstamp_update_setup(zp, STATE_CHANGED, NULL, ctime, B_TRUE);
+	return (sa_bulk_update(zp->z_sa_hdl, bulk, count, tx));
+}
+
+/*
+ * Update access mask for prepended ACE
+ *
+ * This applies the "groupmask" value for aclmode property.
+ */
+static void
+zfs_acl_prepend_fixup(zfs_acl_t *aclp, void  *acep, void  *origacep,
+    mode_t mode, uint64_t owner)
+{
+	int	rmask, wmask, xmask;
+	int	user_ace;
+	uint16_t aceflags;
+	uint32_t origmask, acepmask;
+	uint64_t fuid;
+
+	aceflags = aclp->z_ops.ace_flags_get(acep);
+	fuid = aclp->z_ops.ace_who_get(acep);
+	origmask = aclp->z_ops.ace_mask_get(origacep);
+	acepmask = aclp->z_ops.ace_mask_get(acep);
+
+	user_ace = (!(aceflags &
+	    (ACE_OWNER|ACE_GROUP|ACE_IDENTIFIER_GROUP)));
+
+	if (user_ace && (fuid == owner)) {
+		rmask = S_IRUSR;
+		wmask = S_IWUSR;
+		xmask = S_IXUSR;
+	} else {
+		rmask = S_IRGRP;
+		wmask = S_IWGRP;
+		xmask = S_IXGRP;
+	}
+
+	if (origmask & ACE_READ_DATA) {
+		if (mode & rmask) {
+			acepmask &= ~ACE_READ_DATA;
+		} else {
+			acepmask |= ACE_READ_DATA;
+		}
+	}
+
+	if (origmask & ACE_WRITE_DATA) {
+		if (mode & wmask) {
+			acepmask &= ~ACE_WRITE_DATA;
+		} else {
+			acepmask |= ACE_WRITE_DATA;
+		}
+	}
+
+	if (origmask & ACE_APPEND_DATA) {
+		if (mode & wmask) {
+			acepmask &= ~ACE_APPEND_DATA;
+		} else {
+			acepmask |= ACE_APPEND_DATA;
+		}
+	}
+
+	if (origmask & ACE_EXECUTE) {
+		if (mode & xmask) {
+			acepmask &= ~ACE_EXECUTE;
+		} else {
+			acepmask |= ACE_EXECUTE;
+		}
+	}
+	aclp->z_ops.ace_mask_set(acep, acepmask);
+}
+
+static void
+zfs_acl_chmod(zfsvfs_t *zfsvfs, uint64_t mode, zfs_acl_t *aclp)
+{
+	void		*acep = NULL;
+	uint64_t	who;
+	int		new_count, new_bytes;
+	int		ace_size;
+	int 		entry_type;
+	uint16_t	iflags, type;
+	uint32_t	access_mask;
+	zfs_acl_node_t	*newnode;
+	size_t 		abstract_size = aclp->z_ops.ace_abstract_size();
+	void 		*zacep;
+	uint32_t 	owner, group, everyone;
+	uint32_t	deny1, deny2, allow0;
+
+	new_count = new_bytes = 0;
+
+	acl_trivial_access_masks((mode_t)mode, &allow0, &deny1, &deny2,
+	    &owner, &group, &everyone);
+
+	newnode = zfs_acl_node_alloc((abstract_size * 6) + aclp->z_acl_bytes);
+
+	zacep = newnode->z_acldata;
+	if (allow0) {
+		zfs_set_ace(aclp, zacep, allow0, ALLOW, -1, ACE_OWNER);
+		zacep = (void *)((uintptr_t)zacep + abstract_size);
+		new_count++;
+		new_bytes += abstract_size;
+	} if (deny1) {
+		zfs_set_ace(aclp, zacep, deny1, DENY, -1, ACE_OWNER);
+		zacep = (void *)((uintptr_t)zacep + abstract_size);
+		new_count++;
+		new_bytes += abstract_size;
+	}
+	if (deny2) {
+		zfs_set_ace(aclp, zacep, deny2, DENY, -1, OWNING_GROUP);
+		zacep = (void *)((uintptr_t)zacep + abstract_size);
+		new_count++;
+		new_bytes += abstract_size;
+	}
+
+	while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
+	    &iflags, &type)) {
+		uint16_t inherit_flags;
+
+		entry_type = (iflags & ACE_TYPE_FLAGS);
+		inherit_flags = (iflags & ALL_INHERIT);
+
+		if ((entry_type == ACE_OWNER || entry_type == ACE_EVERYONE ||
+		    (entry_type == OWNING_GROUP)) &&
+		    ((inherit_flags & ACE_INHERIT_ONLY_ACE) == 0)) {
+			continue;
+		}
+
+		if ((type != ALLOW && type != DENY) ||
+		    (inherit_flags & ACE_INHERIT_ONLY_ACE)) {
+			if (inherit_flags)
+				aclp->z_hints |= ZFS_INHERIT_ACE;
+			switch (type) {
+			case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+			case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+			case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+			case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+				aclp->z_hints |= ZFS_ACL_OBJ_ACE;
+				break;
+			}
+		} else {
+
+			/*
+			 * Limit permissions to be no greater than
+			 * group permissions
+			 */
+			if (zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) {
+				if (!(mode & S_IRGRP))
+					access_mask &= ~ACE_READ_DATA;
+				if (!(mode & S_IWGRP))
+					access_mask &=
+					    ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
+				if (!(mode & S_IXGRP))
+					access_mask &= ~ACE_EXECUTE;
+				access_mask &=
+				    ~(ACE_WRITE_OWNER|ACE_WRITE_ACL|
+				    ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS);
+			}
+		}
+		zfs_set_ace(aclp, zacep, access_mask, type, who, iflags);
+		ace_size = aclp->z_ops.ace_size(acep);
+		zacep = (void *)((uintptr_t)zacep + ace_size);
+		new_count++;
+		new_bytes += ace_size;
+	}
+	zfs_set_ace(aclp, zacep, owner, 0, -1, ACE_OWNER);
+	zacep = (void *)((uintptr_t)zacep + abstract_size);
+	zfs_set_ace(aclp, zacep, group, 0, -1, OWNING_GROUP);
+	zacep = (void *)((uintptr_t)zacep + abstract_size);
+	zfs_set_ace(aclp, zacep, everyone, 0, -1, ACE_EVERYONE);
+
+	new_count += 3;
+	new_bytes += abstract_size * 3;
+	zfs_acl_release_nodes(aclp);
+	aclp->z_acl_count = new_count;
+	aclp->z_acl_bytes = new_bytes;
+	newnode->z_ace_count = new_count;
+	newnode->z_size = new_bytes;
+	list_insert_tail(&aclp->z_acl, newnode);
+}
+
+void
+zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode)
+{
+	mutex_enter(&zp->z_acl_lock);
+	mutex_enter(&zp->z_lock);
+	*aclp = zfs_acl_alloc(zfs_acl_version_zp(zp));
+	(*aclp)->z_hints = zp->z_pflags & V4_ACL_WIDE_FLAGS;
+	zfs_acl_chmod(zp->z_zfsvfs, mode, *aclp);
+	mutex_exit(&zp->z_lock);
+	mutex_exit(&zp->z_acl_lock);
+	ASSERT(*aclp);
+}
+
+/*
+ * strip off write_owner and write_acl
+ */
+static void
+zfs_restricted_update(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, void *acep)
+{
+	uint32_t mask = aclp->z_ops.ace_mask_get(acep);
+
+	if ((zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) &&
+	    (aclp->z_ops.ace_type_get(acep) == ALLOW)) {
+		mask &= ~RESTRICTED_CLEAR;
+		aclp->z_ops.ace_mask_set(acep, mask);
+	}
+}
+
+/*
+ * Should ACE be inherited?
+ */
+static int
+zfs_ace_can_use(vtype_t vtype, uint16_t acep_flags)
+{
+	int	iflags = (acep_flags & 0xf);
+
+	if ((vtype == VDIR) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
+		return (1);
+	else if (iflags & ACE_FILE_INHERIT_ACE)
+		return (!((vtype == VDIR) &&
+		    (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)));
+	return (0);
+}
+
+/*
+ * inherit inheritable ACEs from parent
+ */
+static zfs_acl_t *
+zfs_acl_inherit(zfsvfs_t *zfsvfs, vtype_t vtype, zfs_acl_t *paclp,
+    uint64_t mode, boolean_t *need_chmod)
+{
+	void		*pacep;
+	void		*acep;
+	zfs_acl_node_t  *aclnode;
+	zfs_acl_t	*aclp = NULL;
+	uint64_t	who;
+	uint32_t	access_mask;
+	uint16_t	iflags, newflags, type;
+	size_t		ace_size;
+	void		*data1, *data2;
+	size_t		data1sz, data2sz;
+	boolean_t	vdir = vtype == VDIR;
+	boolean_t	vreg = vtype == VREG;
+	boolean_t	passthrough, passthrough_x, noallow;
+
+	passthrough_x =
+	    zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH_X;
+	passthrough = passthrough_x ||
+	    zfsvfs->z_acl_inherit == ZFS_ACL_PASSTHROUGH;
+	noallow =
+	    zfsvfs->z_acl_inherit == ZFS_ACL_NOALLOW;
+
+	*need_chmod = B_TRUE;
+	pacep = NULL;
+	aclp = zfs_acl_alloc(paclp->z_version);
+	if (zfsvfs->z_acl_inherit == ZFS_ACL_DISCARD || vtype == VLNK)
+		return (aclp);
+	while (pacep = zfs_acl_next_ace(paclp, pacep, &who,
+	    &access_mask, &iflags, &type)) {
+
+		/*
+		 * don't inherit bogus ACEs
+		 */
+		if (!zfs_acl_valid_ace_type(type, iflags))
+			continue;
+
+		if (noallow && type == ALLOW)
+			continue;
+
+		ace_size = aclp->z_ops.ace_size(pacep);
+
+		if (!zfs_ace_can_use(vtype, iflags))
+			continue;
+
+		/*
+		 * If owner@, group@, or everyone@ inheritable
+		 * then zfs_acl_chmod() isn't needed.
+		 */
+		if (passthrough &&
+		    ((iflags & (ACE_OWNER|ACE_EVERYONE)) ||
+		    ((iflags & OWNING_GROUP) ==
+		    OWNING_GROUP)) && (vreg || (vdir && (iflags &
+		    ACE_DIRECTORY_INHERIT_ACE)))) {
+			*need_chmod = B_FALSE;
+		}
+
+		if (!vdir && passthrough_x &&
+		    ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) {
+			access_mask &= ~ACE_EXECUTE;
+		}
+
+		aclnode = zfs_acl_node_alloc(ace_size);
+		list_insert_tail(&aclp->z_acl, aclnode);
+		acep = aclnode->z_acldata;
+
+		zfs_set_ace(aclp, acep, access_mask, type,
+		    who, iflags|ACE_INHERITED_ACE);
+
+		/*
+		 * Copy special opaque data if any
+		 */
+		if ((data1sz = paclp->z_ops.ace_data(pacep, &data1)) != 0) {
+			VERIFY((data2sz = aclp->z_ops.ace_data(acep,
+			    &data2)) == data1sz);
+			bcopy(data1, data2, data2sz);
+		}
+
+		aclp->z_acl_count++;
+		aclnode->z_ace_count++;
+		aclp->z_acl_bytes += aclnode->z_size;
+		newflags = aclp->z_ops.ace_flags_get(acep);
+
+		if (vdir)
+			aclp->z_hints |= ZFS_INHERIT_ACE;
+
+		if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || !vdir) {
+			newflags &= ~ALL_INHERIT;
+			aclp->z_ops.ace_flags_set(acep,
+			    newflags|ACE_INHERITED_ACE);
+			zfs_restricted_update(zfsvfs, aclp, acep);
+			continue;
+		}
+
+		ASSERT(vdir);
+
+		/*
+		 * If only FILE_INHERIT is set then turn on
+		 * inherit_only
+		 */
+		if ((iflags & (ACE_FILE_INHERIT_ACE |
+		    ACE_DIRECTORY_INHERIT_ACE)) == ACE_FILE_INHERIT_ACE) {
+			newflags |= ACE_INHERIT_ONLY_ACE;
+			aclp->z_ops.ace_flags_set(acep,
+			    newflags|ACE_INHERITED_ACE);
+		} else {
+			newflags &= ~ACE_INHERIT_ONLY_ACE;
+			aclp->z_ops.ace_flags_set(acep,
+			    newflags|ACE_INHERITED_ACE);
+		}
+	}
+	return (aclp);
+}
+
+/*
+ * Create file system object initial permissions
+ * including inheritable ACEs.
+ */
+int
+zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
+    vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids)
+{
+	int		error;
+	zfsvfs_t	*zfsvfs = dzp->z_zfsvfs;
+	zfs_acl_t	*paclp;
+	gid_t		gid;
+	boolean_t	need_chmod = B_TRUE;
+	boolean_t	inherited = B_FALSE;
+
+	bzero(acl_ids, sizeof (zfs_acl_ids_t));
+	acl_ids->z_mode = MAKEIMODE(vap->va_type, vap->va_mode);
+
+	if (vsecp)
+		if ((error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, cr,
+		    &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0)
+			return (error);
+	/*
+	 * Determine uid and gid.
+	 */
+	if ((flag & IS_ROOT_NODE) || zfsvfs->z_replay ||
+	    ((flag & IS_XATTR) && (vap->va_type == VDIR))) {
+		acl_ids->z_fuid = zfs_fuid_create(zfsvfs,
+		    (uint64_t)vap->va_uid, cr,
+		    ZFS_OWNER, &acl_ids->z_fuidp);
+		acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
+		    (uint64_t)vap->va_gid, cr,
+		    ZFS_GROUP, &acl_ids->z_fuidp);
+		gid = vap->va_gid;
+	} else {
+		acl_ids->z_fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER,
+		    cr, &acl_ids->z_fuidp);
+		acl_ids->z_fgid = 0;
+		if (vap->va_mask & AT_GID)  {
+			acl_ids->z_fgid = zfs_fuid_create(zfsvfs,
+			    (uint64_t)vap->va_gid,
+			    cr, ZFS_GROUP, &acl_ids->z_fuidp);
+			gid = vap->va_gid;
+			if (acl_ids->z_fgid != dzp->z_gid &&
+			    !groupmember(vap->va_gid, cr) &&
+			    secpolicy_vnode_create_gid(cr) != 0)
+				acl_ids->z_fgid = 0;
+		}
+		if (acl_ids->z_fgid == 0) {
+			if (dzp->z_mode & S_ISGID) {
+				char		*domain;
+				uint32_t	rid;
+
+				acl_ids->z_fgid = dzp->z_gid;
+				gid = zfs_fuid_map_id(zfsvfs, acl_ids->z_fgid,
+				    cr, ZFS_GROUP);
+
+				if (zfsvfs->z_use_fuids &&
+				    IS_EPHEMERAL(acl_ids->z_fgid)) {
+					domain = zfs_fuid_idx_domain(
+					    &zfsvfs->z_fuid_idx,
+					    FUID_INDEX(acl_ids->z_fgid));
+					rid = FUID_RID(acl_ids->z_fgid);
+					zfs_fuid_node_add(&acl_ids->z_fuidp,
+					    domain, rid,
+					    FUID_INDEX(acl_ids->z_fgid),
+					    acl_ids->z_fgid, ZFS_GROUP);
+				}
+			} else {
+				acl_ids->z_fgid = zfs_fuid_create_cred(zfsvfs,
+				    ZFS_GROUP, cr, &acl_ids->z_fuidp);
+				gid = crgetgid(cr);
+			}
+		}
+	}
+
+	/*
+	 * If we're creating a directory, and the parent directory has the
+	 * set-GID bit set, set in on the new directory.
+	 * Otherwise, if the user is neither privileged nor a member of the
+	 * file's new group, clear the file's set-GID bit.
+	 */
+
+	if (!(flag & IS_ROOT_NODE) && (dzp->z_mode & S_ISGID) &&
+	    (vap->va_type == VDIR)) {
+		acl_ids->z_mode |= S_ISGID;
+	} else {
+		if ((acl_ids->z_mode & S_ISGID) &&
+		    secpolicy_vnode_setids_setgids(cr, gid) != 0)
+			acl_ids->z_mode &= ~S_ISGID;
+	}
+
+	if (acl_ids->z_aclp == NULL) {
+		mutex_enter(&dzp->z_acl_lock);
+		mutex_enter(&dzp->z_lock);
+		if (!(flag & IS_ROOT_NODE) && (ZTOV(dzp)->v_type == VDIR &&
+		    (dzp->z_pflags & ZFS_INHERIT_ACE)) &&
+		    !(dzp->z_pflags & ZFS_XATTR)) {
+			VERIFY(0 == zfs_acl_node_read(dzp, B_TRUE,
+			    &paclp, B_FALSE));
+			acl_ids->z_aclp = zfs_acl_inherit(zfsvfs,
+			    vap->va_type, paclp, acl_ids->z_mode, &need_chmod);
+			inherited = B_TRUE;
+		} else {
+			acl_ids->z_aclp =
+			    zfs_acl_alloc(zfs_acl_version_zp(dzp));
+			acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
+		}
+		mutex_exit(&dzp->z_lock);
+		mutex_exit(&dzp->z_acl_lock);
+		if (need_chmod) {
+			acl_ids->z_aclp->z_hints |= (vap->va_type == VDIR) ?
+			    ZFS_ACL_AUTO_INHERIT : 0;
+			zfs_acl_chmod(zfsvfs, acl_ids->z_mode, acl_ids->z_aclp);
+		}
+	}
+
+	if (inherited || vsecp) {
+		acl_ids->z_mode = zfs_mode_compute(acl_ids->z_mode,
+		    acl_ids->z_aclp, &acl_ids->z_aclp->z_hints,
+		    acl_ids->z_fuid, acl_ids->z_fgid);
+		if (ace_trivial_common(acl_ids->z_aclp, 0, zfs_ace_walk) == 0)
+			acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL;
+	}
+
+	return (0);
+}
+
+/*
+ * Free ACL and fuid_infop, but not the acl_ids structure
+ */
+void
+zfs_acl_ids_free(zfs_acl_ids_t *acl_ids)
+{
+	if (acl_ids->z_aclp)
+		zfs_acl_free(acl_ids->z_aclp);
+	if (acl_ids->z_fuidp)
+		zfs_fuid_info_free(acl_ids->z_fuidp);
+	acl_ids->z_aclp = NULL;
+	acl_ids->z_fuidp = NULL;
+}
+
+boolean_t
+zfs_acl_ids_overquota(zfsvfs_t *zfsvfs, zfs_acl_ids_t *acl_ids)
+{
+	return (zfs_fuid_overquota(zfsvfs, B_FALSE, acl_ids->z_fuid) ||
+	    zfs_fuid_overquota(zfsvfs, B_TRUE, acl_ids->z_fgid));
+}
+
+/*
+ * Retrieve a files ACL
+ */
+int
+zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
+{
+	zfs_acl_t	*aclp;
+	ulong_t		mask;
+	int		error;
+	int 		count = 0;
+	int		largeace = 0;
+
+	mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT |
+	    VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES);
+
+	if (mask == 0)
+		return (ENOSYS);
+
+	if (error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr))
+		return (error);
+
+	mutex_enter(&zp->z_acl_lock);
+
+	error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
+	if (error != 0) {
+		mutex_exit(&zp->z_acl_lock);
+		return (error);
+	}
+
+	/*
+	 * Scan ACL to determine number of ACEs
+	 */
+	if ((zp->z_pflags & ZFS_ACL_OBJ_ACE) && !(mask & VSA_ACE_ALLTYPES)) {
+		void *zacep = NULL;
+		uint64_t who;
+		uint32_t access_mask;
+		uint16_t type, iflags;
+
+		while (zacep = zfs_acl_next_ace(aclp, zacep,
+		    &who, &access_mask, &iflags, &type)) {
+			switch (type) {
+			case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+			case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+			case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+			case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+				largeace++;
+				continue;
+			default:
+				count++;
+			}
+		}
+		vsecp->vsa_aclcnt = count;
+	} else
+		count = (int)aclp->z_acl_count;
+
+	if (mask & VSA_ACECNT) {
+		vsecp->vsa_aclcnt = count;
+	}
+
+	if (mask & VSA_ACE) {
+		size_t aclsz;
+
+		aclsz = count * sizeof (ace_t) +
+		    sizeof (ace_object_t) * largeace;
+
+		vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP);
+		vsecp->vsa_aclentsz = aclsz;
+
+		if (aclp->z_version == ZFS_ACL_VERSION_FUID)
+			zfs_copy_fuid_2_ace(zp->z_zfsvfs, aclp, cr,
+			    vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES));
+		else {
+			zfs_acl_node_t *aclnode;
+			void *start = vsecp->vsa_aclentp;
+
+			for (aclnode = list_head(&aclp->z_acl); aclnode;
+			    aclnode = list_next(&aclp->z_acl, aclnode)) {
+				bcopy(aclnode->z_acldata, start,
+				    aclnode->z_size);
+				start = (caddr_t)start + aclnode->z_size;
+			}
+			ASSERT((caddr_t)start - (caddr_t)vsecp->vsa_aclentp ==
+			    aclp->z_acl_bytes);
+		}
+	}
+	if (mask & VSA_ACE_ACLFLAGS) {
+		vsecp->vsa_aclflags = 0;
+		if (zp->z_pflags & ZFS_ACL_DEFAULTED)
+			vsecp->vsa_aclflags |= ACL_DEFAULTED;
+		if (zp->z_pflags & ZFS_ACL_PROTECTED)
+			vsecp->vsa_aclflags |= ACL_PROTECTED;
+		if (zp->z_pflags & ZFS_ACL_AUTO_INHERIT)
+			vsecp->vsa_aclflags |= ACL_AUTO_INHERIT;
+	}
+
+	mutex_exit(&zp->z_acl_lock);
+
+	return (0);
+}
+
+int
+zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, vtype_t obj_type,
+    vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp)
+{
+	zfs_acl_t *aclp;
+	zfs_acl_node_t *aclnode;
+	int aclcnt = vsecp->vsa_aclcnt;
+	int error;
+
+	if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0)
+		return (EINVAL);
+
+	aclp = zfs_acl_alloc(zfs_acl_version(zfsvfs->z_version));
+
+	aclp->z_hints = 0;
+	aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t));
+	if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) {
+		if ((error = zfs_copy_ace_2_oldace(obj_type, aclp,
+		    (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata,
+		    aclcnt, &aclnode->z_size)) != 0) {
+			zfs_acl_free(aclp);
+			zfs_acl_node_free(aclnode);
+			return (error);
+		}
+	} else {
+		if ((error = zfs_copy_ace_2_fuid(zfsvfs, obj_type, aclp,
+		    vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
+		    &aclnode->z_size, fuidp, cr)) != 0) {
+			zfs_acl_free(aclp);
+			zfs_acl_node_free(aclnode);
+			return (error);
+		}
+	}
+	aclp->z_acl_bytes = aclnode->z_size;
+	aclnode->z_ace_count = aclcnt;
+	aclp->z_acl_count = aclcnt;
+	list_insert_head(&aclp->z_acl, aclnode);
+
+	/*
+	 * If flags are being set then add them to z_hints
+	 */
+	if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) {
+		if (vsecp->vsa_aclflags & ACL_PROTECTED)
+			aclp->z_hints |= ZFS_ACL_PROTECTED;
+		if (vsecp->vsa_aclflags & ACL_DEFAULTED)
+			aclp->z_hints |= ZFS_ACL_DEFAULTED;
+		if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT)
+			aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
+	}
+
+	*zaclp = aclp;
+
+	return (0);
+}
+
+/*
+ * Set a files ACL
+ */
+int
+zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr)
+{
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	zilog_t		*zilog = zfsvfs->z_log;
+	ulong_t		mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT);
+	dmu_tx_t	*tx;
+	int		error;
+	zfs_acl_t	*aclp;
+	zfs_fuid_info_t	*fuidp = NULL;
+	boolean_t	fuid_dirtied;
+	uint64_t	acl_obj;
+
+	if (mask == 0)
+		return (ENOSYS);
+
+	if (zp->z_pflags & ZFS_IMMUTABLE)
+		return (EPERM);
+
+	if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr))
+		return (error);
+
+	error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, cr, &fuidp,
+	    &aclp);
+	if (error)
+		return (error);
+
+	/*
+	 * If ACL wide flags aren't being set then preserve any
+	 * existing flags.
+	 */
+	if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) {
+		aclp->z_hints |=
+		    (zp->z_pflags & V4_ACL_WIDE_FLAGS);
+	}
+top:
+	mutex_enter(&zp->z_acl_lock);
+	mutex_enter(&zp->z_lock);
+
+	tx = dmu_tx_create(zfsvfs->z_os);
+
+	dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+
+	fuid_dirtied = zfsvfs->z_fuid_dirty;
+	if (fuid_dirtied)
+		zfs_fuid_txhold(zfsvfs, tx);
+
+	/*
+	 * If old version and ACL won't fit in bonus and we aren't
+	 * upgrading then take out necessary DMU holds
+	 */
+
+	if ((acl_obj = zfs_external_acl(zp)) != 0) {
+		if (zfsvfs->z_version >= ZPL_VERSION_FUID &&
+		    zfs_znode_acl_version(zp) <= ZFS_ACL_VERSION_INITIAL) {
+			dmu_tx_hold_free(tx, acl_obj, 0,
+			    DMU_OBJECT_END);
+			dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
+			    aclp->z_acl_bytes);
+		} else {
+			dmu_tx_hold_write(tx, acl_obj, 0, aclp->z_acl_bytes);
+		}
+	} else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+		dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
+	}
+
+	zfs_sa_upgrade_txholds(tx, zp);
+	error = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (error) {
+		mutex_exit(&zp->z_acl_lock);
+		mutex_exit(&zp->z_lock);
+
+		if (error == ERESTART) {
+			dmu_tx_wait(tx);
+			dmu_tx_abort(tx);
+			goto top;
+		}
+		dmu_tx_abort(tx);
+		zfs_acl_free(aclp);
+		return (error);
+	}
+
+	error = zfs_aclset_common(zp, aclp, cr, tx);
+	ASSERT(error == 0);
+	ASSERT(zp->z_acl_cached == NULL);
+	zp->z_acl_cached = aclp;
+
+	if (fuid_dirtied)
+		zfs_fuid_sync(zfsvfs, tx);
+
+	zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
+
+	if (fuidp)
+		zfs_fuid_info_free(fuidp);
+	dmu_tx_commit(tx);
+done:
+	mutex_exit(&zp->z_lock);
+	mutex_exit(&zp->z_acl_lock);
+
+	return (error);
+}
+
+/*
+ * Check accesses of interest (AoI) against attributes of the dataset
+ * such as read-only.  Returns zero if no AoI conflict with dataset
+ * attributes, otherwise an appropriate errno is returned.
+ */
+static int
+zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode)
+{
+	if ((v4_mode & WRITE_MASK) &&
+	    (zp->z_zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) &&
+	    (!IS_DEVVP(ZTOV(zp)) ||
+	    (IS_DEVVP(ZTOV(zp)) && (v4_mode & WRITE_MASK_ATTRS)))) {
+		return (EROFS);
+	}
+
+	/*
+	 * Only check for READONLY on non-directories.
+	 */
+	if ((v4_mode & WRITE_MASK_DATA) &&
+	    (((ZTOV(zp)->v_type != VDIR) &&
+	    (zp->z_pflags & (ZFS_READONLY | ZFS_IMMUTABLE))) ||
+	    (ZTOV(zp)->v_type == VDIR &&
+	    (zp->z_pflags & ZFS_IMMUTABLE)))) {
+		return (EPERM);
+	}
+
+	if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
+	    (zp->z_pflags & ZFS_NOUNLINK)) {
+		return (EPERM);
+	}
+
+	if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
+	    (zp->z_pflags & ZFS_AV_QUARANTINED))) {
+		return (EACCES);
+	}
+
+	return (0);
+}
+
+/*
+ * The primary usage of this function is to loop through all of the
+ * ACEs in the znode, determining what accesses of interest (AoI) to
+ * the caller are allowed or denied.  The AoI are expressed as bits in
+ * the working_mode parameter.  As each ACE is processed, bits covered
+ * by that ACE are removed from the working_mode.  This removal
+ * facilitates two things.  The first is that when the working mode is
+ * empty (= 0), we know we've looked at all the AoI. The second is
+ * that the ACE interpretation rules don't allow a later ACE to undo
+ * something granted or denied by an earlier ACE.  Removing the
+ * discovered access or denial enforces this rule.  At the end of
+ * processing the ACEs, all AoI that were found to be denied are
+ * placed into the working_mode, giving the caller a mask of denied
+ * accesses.  Returns:
+ *	0		if all AoI granted
+ *	EACCESS 	if the denied mask is non-zero
+ *	other error	if abnormal failure (e.g., IO error)
+ *
+ * A secondary usage of the function is to determine if any of the
+ * AoI are granted.  If an ACE grants any access in
+ * the working_mode, we immediately short circuit out of the function.
+ * This mode is chosen by setting anyaccess to B_TRUE.  The
+ * working_mode is not a denied access mask upon exit if the function
+ * is used in this manner.
+ */
+static int
+zfs_zaccess_aces_check(znode_t *zp, uint32_t *working_mode,
+    boolean_t anyaccess, cred_t *cr)
+{
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	zfs_acl_t	*aclp;
+	int		error;
+	uid_t		uid = crgetuid(cr);
+	uint64_t 	who;
+	uint16_t	type, iflags;
+	uint16_t	entry_type;
+	uint32_t	access_mask;
+	uint32_t	deny_mask = 0;
+	zfs_ace_hdr_t	*acep = NULL;
+	boolean_t	checkit;
+	uid_t		gowner;
+	uid_t		fowner;
+
+	zfs_fuid_map_ids(zp, cr, &fowner, &gowner);
+
+	mutex_enter(&zp->z_acl_lock);
+
+	error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
+	if (error != 0) {
+		mutex_exit(&zp->z_acl_lock);
+		return (error);
+	}
+
+	ASSERT(zp->z_acl_cached);
+
+	while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask,
+	    &iflags, &type)) {
+		uint32_t mask_matched;
+
+		if (!zfs_acl_valid_ace_type(type, iflags))
+			continue;
+
+		if (ZTOV(zp)->v_type == VDIR && (iflags & ACE_INHERIT_ONLY_ACE))
+			continue;
+
+		/* Skip ACE if it does not affect any AoI */
+		mask_matched = (access_mask & *working_mode);
+		if (!mask_matched)
+			continue;
+
+		entry_type = (iflags & ACE_TYPE_FLAGS);
+
+		checkit = B_FALSE;
+
+		switch (entry_type) {
+		case ACE_OWNER:
+			if (uid == fowner)
+				checkit = B_TRUE;
+			break;
+		case OWNING_GROUP:
+			who = gowner;
+			/*FALLTHROUGH*/
+		case ACE_IDENTIFIER_GROUP:
+			checkit = zfs_groupmember(zfsvfs, who, cr);
+			break;
+		case ACE_EVERYONE:
+			checkit = B_TRUE;
+			break;
+
+		/* USER Entry */
+		default:
+			if (entry_type == 0) {
+				uid_t newid;
+
+				newid = zfs_fuid_map_id(zfsvfs, who, cr,
+				    ZFS_ACE_USER);
+				if (newid != IDMAP_WK_CREATOR_OWNER_UID &&
+				    uid == newid)
+					checkit = B_TRUE;
+				break;
+			} else {
+				mutex_exit(&zp->z_acl_lock);
+				return (EIO);
+			}
+		}
+
+		if (checkit) {
+			if (type == DENY) {
+				DTRACE_PROBE3(zfs__ace__denies,
+				    znode_t *, zp,
+				    zfs_ace_hdr_t *, acep,
+				    uint32_t, mask_matched);
+				deny_mask |= mask_matched;
+			} else {
+				DTRACE_PROBE3(zfs__ace__allows,
+				    znode_t *, zp,
+				    zfs_ace_hdr_t *, acep,
+				    uint32_t, mask_matched);
+				if (anyaccess) {
+					mutex_exit(&zp->z_acl_lock);
+					return (0);
+				}
+			}
+			*working_mode &= ~mask_matched;
+		}
+
+		/* Are we done? */
+		if (*working_mode == 0)
+			break;
+	}
+
+	mutex_exit(&zp->z_acl_lock);
+
+	/* Put the found 'denies' back on the working mode */
+	if (deny_mask) {
+		*working_mode |= deny_mask;
+		return (EACCES);
+	} else if (*working_mode) {
+		return (-1);
+	}
+
+	return (0);
+}
+
+/*
+ * Return true if any access whatsoever granted, we don't actually
+ * care what access is granted.
+ */
+boolean_t
+zfs_has_access(znode_t *zp, cred_t *cr)
+{
+	uint32_t have = ACE_ALL_PERMS;
+
+	if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr) != 0) {
+		uid_t owner;
+
+		owner = zfs_fuid_map_id(zp->z_zfsvfs, zp->z_uid, cr, ZFS_OWNER);
+		return (secpolicy_vnode_any_access(cr, ZTOV(zp), owner) == 0);
+	}
+	return (B_TRUE);
+}
+
+static int
+zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
+    boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr)
+{
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	int err;
+
+	*working_mode = v4_mode;
+	*check_privs = B_TRUE;
+
+	/*
+	 * Short circuit empty requests
+	 */
+	if (v4_mode == 0 || zfsvfs->z_replay) {
+		*working_mode = 0;
+		return (0);
+	}
+
+	if ((err = zfs_zaccess_dataset_check(zp, v4_mode)) != 0) {
+		*check_privs = B_FALSE;
+		return (err);
+	}
+
+	/*
+	 * The caller requested that the ACL check be skipped.  This
+	 * would only happen if the caller checked VOP_ACCESS() with a
+	 * 32 bit ACE mask and already had the appropriate permissions.
+	 */
+	if (skipaclchk) {
+		*working_mode = 0;
+		return (0);
+	}
+
+	return (zfs_zaccess_aces_check(zp, working_mode, B_FALSE, cr));
+}
+
+static int
+zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs,
+    cred_t *cr)
+{
+	if (*working_mode != ACE_WRITE_DATA)
+		return (EACCES);
+
+	return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode,
+	    check_privs, B_FALSE, cr));
+}
+
+int
+zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr)
+{
+	boolean_t owner = B_FALSE;
+	boolean_t groupmbr = B_FALSE;
+	boolean_t is_attr;
+	uid_t uid = crgetuid(cr);
+	int error;
+
+	if (zdp->z_pflags & ZFS_AV_QUARANTINED)
+		return (EACCES);
+
+	is_attr = ((zdp->z_pflags & ZFS_XATTR) &&
+	    (ZTOV(zdp)->v_type == VDIR));
+	if (is_attr)
+		goto slow;
+
+
+	mutex_enter(&zdp->z_acl_lock);
+
+	if (zdp->z_pflags & ZFS_NO_EXECS_DENIED) {
+		mutex_exit(&zdp->z_acl_lock);
+		return (0);
+	}
+
+	if (FUID_INDEX(zdp->z_uid) != 0 || FUID_INDEX(zdp->z_gid) != 0) {
+		mutex_exit(&zdp->z_acl_lock);
+		goto slow;
+	}
+
+	if (uid == zdp->z_uid) {
+		owner = B_TRUE;
+		if (zdp->z_mode & S_IXUSR) {
+			mutex_exit(&zdp->z_acl_lock);
+			return (0);
+		} else {
+			mutex_exit(&zdp->z_acl_lock);
+			goto slow;
+		}
+	}
+	if (groupmember(zdp->z_gid, cr)) {
+		groupmbr = B_TRUE;
+		if (zdp->z_mode & S_IXGRP) {
+			mutex_exit(&zdp->z_acl_lock);
+			return (0);
+		} else {
+			mutex_exit(&zdp->z_acl_lock);
+			goto slow;
+		}
+	}
+	if (!owner && !groupmbr) {
+		if (zdp->z_mode & S_IXOTH) {
+			mutex_exit(&zdp->z_acl_lock);
+			return (0);
+		}
+	}
+
+	mutex_exit(&zdp->z_acl_lock);
+
+slow:
+	DTRACE_PROBE(zfs__fastpath__execute__access__miss);
+	ZFS_ENTER(zdp->z_zfsvfs);
+	error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr);
+	ZFS_EXIT(zdp->z_zfsvfs);
+	return (error);
+}
+
+/*
+ * Determine whether Access should be granted/denied.
+ * The least priv subsytem is always consulted as a basic privilege
+ * can define any form of access.
+ */
+int
+zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr)
+{
+	uint32_t	working_mode;
+	int		error;
+	int		is_attr;
+	boolean_t 	check_privs;
+	znode_t		*xzp;
+	znode_t 	*check_zp = zp;
+	mode_t		needed_bits;
+	uid_t		owner;
+
+	is_attr = ((zp->z_pflags & ZFS_XATTR) && (ZTOV(zp)->v_type == VDIR));
+
+	/*
+	 * If attribute then validate against base file
+	 */
+	if (is_attr) {
+		uint64_t	parent;
+
+		if ((error = sa_lookup(zp->z_sa_hdl,
+		    SA_ZPL_PARENT(zp->z_zfsvfs), &parent,
+		    sizeof (parent))) != 0)
+			return (error);
+
+		if ((error = zfs_zget(zp->z_zfsvfs,
+		    parent, &xzp)) != 0)	{
+			return (error);
+		}
+
+		check_zp = xzp;
+
+		/*
+		 * fixup mode to map to xattr perms
+		 */
+
+		if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) {
+			mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA);
+			mode |= ACE_WRITE_NAMED_ATTRS;
+		}
+
+		if (mode & (ACE_READ_DATA|ACE_EXECUTE)) {
+			mode &= ~(ACE_READ_DATA|ACE_EXECUTE);
+			mode |= ACE_READ_NAMED_ATTRS;
+		}
+	}
+
+	owner = zfs_fuid_map_id(zp->z_zfsvfs, zp->z_uid, cr, ZFS_OWNER);
+	/*
+	 * Map the bits required to the standard vnode flags VREAD|VWRITE|VEXEC
+	 * in needed_bits.  Map the bits mapped by working_mode (currently
+	 * missing) in missing_bits.
+	 * Call secpolicy_vnode_access2() with (needed_bits & ~checkmode),
+	 * needed_bits.
+	 */
+	needed_bits = 0;
+
+	working_mode = mode;
+	if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) &&
+	    owner == crgetuid(cr))
+		working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
+
+	if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
+	    ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
+		needed_bits |= VREAD;
+	if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
+	    ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
+		needed_bits |= VWRITE;
+	if (working_mode & ACE_EXECUTE)
+		needed_bits |= VEXEC;
+
+	if ((error = zfs_zaccess_common(check_zp, mode, &working_mode,
+	    &check_privs, skipaclchk, cr)) == 0) {
+		if (is_attr)
+			VN_RELE(ZTOV(xzp));
+		return (secpolicy_vnode_access2(cr, ZTOV(zp), owner,
+		    needed_bits, needed_bits));
+	}
+
+	if (error && !check_privs) {
+		if (is_attr)
+			VN_RELE(ZTOV(xzp));
+		return (error);
+	}
+
+	if (error && (flags & V_APPEND)) {
+		error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr);
+	}
+
+	if (error && check_privs) {
+		mode_t		checkmode = 0;
+
+		/*
+		 * First check for implicit owner permission on
+		 * read_acl/read_attributes
+		 */
+
+		error = 0;
+		ASSERT(working_mode != 0);
+
+		if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) &&
+		    owner == crgetuid(cr)))
+			working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES);
+
+		if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS|
+		    ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE))
+			checkmode |= VREAD;
+		if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS|
+		    ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE))
+			checkmode |= VWRITE;
+		if (working_mode & ACE_EXECUTE)
+			checkmode |= VEXEC;
+
+		error = secpolicy_vnode_access2(cr, ZTOV(check_zp), owner,
+		    needed_bits & ~checkmode, needed_bits);
+
+		if (error == 0 && (working_mode & ACE_WRITE_OWNER))
+			error = secpolicy_vnode_chown(cr, owner);
+		if (error == 0 && (working_mode & ACE_WRITE_ACL))
+			error = secpolicy_vnode_setdac(cr, owner);
+
+		if (error == 0 && (working_mode &
+		    (ACE_DELETE|ACE_DELETE_CHILD)))
+			error = secpolicy_vnode_remove(cr);
+
+		if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) {
+			error = secpolicy_vnode_chown(cr, owner);
+		}
+		if (error == 0) {
+			/*
+			 * See if any bits other than those already checked
+			 * for are still present.  If so then return EACCES
+			 */
+			if (working_mode & ~(ZFS_CHECKED_MASKS)) {
+				error = EACCES;
+			}
+		}
+	} else if (error == 0) {
+		error = secpolicy_vnode_access2(cr, ZTOV(zp), owner,
+		    needed_bits, needed_bits);
+	}
+
+
+	if (is_attr)
+		VN_RELE(ZTOV(xzp));
+
+	return (error);
+}
+
+/*
+ * Translate traditional unix VREAD/VWRITE/VEXEC mode into
+ * native ACL format and call zfs_zaccess()
+ */
+int
+zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr)
+{
+	return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr));
+}
+
+/*
+ * Access function for secpolicy_vnode_setattr
+ */
+int
+zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr)
+{
+	int v4_mode = zfs_unix_to_v4(mode >> 6);
+
+	return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr));
+}
+
+static int
+zfs_delete_final_check(znode_t *zp, znode_t *dzp,
+    mode_t available_perms, cred_t *cr)
+{
+	int error;
+	uid_t downer;
+
+	downer = zfs_fuid_map_id(dzp->z_zfsvfs, dzp->z_uid, cr, ZFS_OWNER);
+
+	error = secpolicy_vnode_access2(cr, ZTOV(dzp),
+	    downer, available_perms, VWRITE|VEXEC);
+
+	if (error == 0)
+		error = zfs_sticky_remove_access(dzp, zp, cr);
+
+	return (error);
+}
+
+/*
+ * Determine whether Access should be granted/deny, without
+ * consulting least priv subsystem.
+ *
+ *
+ * The following chart is the recommended NFSv4 enforcement for
+ * ability to delete an object.
+ *
+ *      -------------------------------------------------------
+ *      |   Parent Dir  |           Target Object Permissions |
+ *      |  permissions  |                                     |
+ *      -------------------------------------------------------
+ *      |               | ACL Allows | ACL Denies| Delete     |
+ *      |               |  Delete    |  Delete   | unspecified|
+ *      -------------------------------------------------------
+ *      |  ACL Allows   | Permit     | Permit    | Permit     |
+ *      |  DELETE_CHILD |                                     |
+ *      -------------------------------------------------------
+ *      |  ACL Denies   | Permit     | Deny      | Deny       |
+ *      |  DELETE_CHILD |            |           |            |
+ *      -------------------------------------------------------
+ *      | ACL specifies |            |           |            |
+ *      | only allow    | Permit     | Permit    | Permit     |
+ *      | write and     |            |           |            |
+ *      | execute       |            |           |            |
+ *      -------------------------------------------------------
+ *      | ACL denies    |            |           |            |
+ *      | write and     | Permit     | Deny      | Deny       |
+ *      | execute       |            |           |            |
+ *      -------------------------------------------------------
+ *         ^
+ *         |
+ *         No search privilege, can't even look up file?
+ *
+ */
+int
+zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr)
+{
+	uint32_t dzp_working_mode = 0;
+	uint32_t zp_working_mode = 0;
+	int dzp_error, zp_error;
+	mode_t available_perms;
+	boolean_t dzpcheck_privs = B_TRUE;
+	boolean_t zpcheck_privs = B_TRUE;
+
+	/*
+	 * We want specific DELETE permissions to
+	 * take precedence over WRITE/EXECUTE.  We don't
+	 * want an ACL such as this to mess us up.
+	 * user:joe:write_data:deny,user:joe:delete:allow
+	 *
+	 * However, deny permissions may ultimately be overridden
+	 * by secpolicy_vnode_access().
+	 *
+	 * We will ask for all of the necessary permissions and then
+	 * look at the working modes from the directory and target object
+	 * to determine what was found.
+	 */
+
+	if (zp->z_pflags & (ZFS_IMMUTABLE | ZFS_NOUNLINK))
+		return (EPERM);
+
+	/*
+	 * First row
+	 * If the directory permissions allow the delete, we are done.
+	 */
+	if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD,
+	    &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0)
+		return (0);
+
+	/*
+	 * If target object has delete permission then we are done
+	 */
+	if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode,
+	    &zpcheck_privs, B_FALSE, cr)) == 0)
+		return (0);
+
+	ASSERT(dzp_error && zp_error);
+
+	if (!dzpcheck_privs)
+		return (dzp_error);
+	if (!zpcheck_privs)
+		return (zp_error);
+
+	/*
+	 * Second row
+	 *
+	 * If directory returns EACCES then delete_child was denied
+	 * due to deny delete_child.  In this case send the request through
+	 * secpolicy_vnode_remove().  We don't use zfs_delete_final_check()
+	 * since that *could* allow the delete based on write/execute permission
+	 * and we want delete permissions to override write/execute.
+	 */
+
+	if (dzp_error == EACCES)
+		return (secpolicy_vnode_remove(cr));
+
+	/*
+	 * Third Row
+	 * only need to see if we have write/execute on directory.
+	 */
+
+	dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA,
+	    &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr);
+
+	if (dzp_error != 0 && !dzpcheck_privs)
+		return (dzp_error);
+
+	/*
+	 * Fourth row
+	 */
+
+	available_perms = (dzp_working_mode & ACE_WRITE_DATA) ? 0 : VWRITE;
+	available_perms |= (dzp_working_mode & ACE_EXECUTE) ? 0 : VEXEC;
+
+	return (zfs_delete_final_check(zp, dzp, available_perms, cr));
+
+}
+
+int
+zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp,
+    znode_t *tzp, cred_t *cr)
+{
+	int add_perm;
+	int error;
+
+	if (szp->z_pflags & ZFS_AV_QUARANTINED)
+		return (EACCES);
+
+	add_perm = (ZTOV(szp)->v_type == VDIR) ?
+	    ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE;
+
+	/*
+	 * Rename permissions are combination of delete permission +
+	 * add file/subdir permission.
+	 */
+
+	/*
+	 * first make sure we do the delete portion.
+	 *
+	 * If that succeeds then check for add_file/add_subdir permissions
+	 */
+
+	if (error = zfs_zaccess_delete(sdzp, szp, cr))
+		return (error);
+
+	/*
+	 * If we have a tzp, see if we can delete it?
+	 */
+	if (tzp) {
+		if (error = zfs_zaccess_delete(tdzp, tzp, cr))
+			return (error);
+	}
+
+	/*
+	 * Now check for add permissions
+	 */
+	error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr);
+
+	return (error);
+}
diff --git a/uts/common/fs/zfs/zfs_byteswap.c b/uts/common/fs/zfs/zfs_byteswap.c
new file mode 100644
index 000000000000..acf632bdbeff
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_byteswap.c
@@ -0,0 +1,199 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/vfs.h>
+#include <sys/fs/zfs.h>
+#include <sys/zfs_znode.h>
+#include <sys/zfs_sa.h>
+#include <sys/zfs_acl.h>
+
+void
+zfs_oldace_byteswap(ace_t *ace, int ace_cnt)
+{
+	int i;
+
+	for (i = 0; i != ace_cnt; i++, ace++) {
+		ace->a_who = BSWAP_32(ace->a_who);
+		ace->a_access_mask = BSWAP_32(ace->a_access_mask);
+		ace->a_flags = BSWAP_16(ace->a_flags);
+		ace->a_type = BSWAP_16(ace->a_type);
+	}
+}
+
+/*
+ * swap ace_t and ace_oject_t
+ */
+void
+zfs_ace_byteswap(void *buf, size_t size, boolean_t zfs_layout)
+{
+	caddr_t end;
+	caddr_t ptr;
+	zfs_ace_t *zacep;
+	ace_t *acep;
+	uint16_t entry_type;
+	size_t entry_size;
+	int ace_type;
+
+	end = (caddr_t)buf + size;
+	ptr = buf;
+
+	while (ptr < end) {
+		if (zfs_layout) {
+			/*
+			 * Avoid overrun.  Embedded aces can have one
+			 * of several sizes.  We don't know exactly
+			 * how many our present, only the size of the
+			 * buffer containing them.  That size may be
+			 * larger than needed to hold the aces
+			 * present.  As long as we do not do any
+			 * swapping beyond the end of our block we are
+			 * okay.  It it safe to swap any non-ace data
+			 * within the block since it is just zeros.
+			 */
+			if (ptr + sizeof (zfs_ace_hdr_t) > end) {
+				break;
+			}
+			zacep = (zfs_ace_t *)ptr;
+			zacep->z_hdr.z_access_mask =
+			    BSWAP_32(zacep->z_hdr.z_access_mask);
+			zacep->z_hdr.z_flags = BSWAP_16(zacep->z_hdr.z_flags);
+			ace_type = zacep->z_hdr.z_type =
+			    BSWAP_16(zacep->z_hdr.z_type);
+			entry_type = zacep->z_hdr.z_flags & ACE_TYPE_FLAGS;
+		} else {
+			/* Overrun avoidance */
+			if (ptr + sizeof (ace_t) > end) {
+				break;
+			}
+			acep = (ace_t *)ptr;
+			acep->a_access_mask = BSWAP_32(acep->a_access_mask);
+			acep->a_flags = BSWAP_16(acep->a_flags);
+			ace_type = acep->a_type = BSWAP_16(acep->a_type);
+			acep->a_who = BSWAP_32(acep->a_who);
+			entry_type = acep->a_flags & ACE_TYPE_FLAGS;
+		}
+		switch (entry_type) {
+		case ACE_OWNER:
+		case ACE_EVERYONE:
+		case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
+			entry_size = zfs_layout ?
+			    sizeof (zfs_ace_hdr_t) : sizeof (ace_t);
+			break;
+		case ACE_IDENTIFIER_GROUP:
+		default:
+			/* Overrun avoidance */
+			if (zfs_layout) {
+				if (ptr + sizeof (zfs_ace_t) <= end) {
+					zacep->z_fuid = BSWAP_64(zacep->z_fuid);
+				} else {
+					entry_size = sizeof (zfs_ace_t);
+					break;
+				}
+			}
+			switch (ace_type) {
+			case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
+			case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
+			case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
+			case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
+				entry_size = zfs_layout ?
+				    sizeof (zfs_object_ace_t) :
+				    sizeof (ace_object_t);
+				break;
+			default:
+				entry_size = zfs_layout ? sizeof (zfs_ace_t) :
+				    sizeof (ace_t);
+				break;
+			}
+		}
+		ptr = ptr + entry_size;
+	}
+}
+
+/* ARGSUSED */
+void
+zfs_oldacl_byteswap(void *buf, size_t size)
+{
+	int cnt;
+
+	/*
+	 * Arggh, since we don't know how many ACEs are in
+	 * the array, we have to swap the entire block
+	 */
+
+	cnt = size / sizeof (ace_t);
+
+	zfs_oldace_byteswap((ace_t *)buf, cnt);
+}
+
+/* ARGSUSED */
+void
+zfs_acl_byteswap(void *buf, size_t size)
+{
+	zfs_ace_byteswap(buf, size, B_TRUE);
+}
+
+void
+zfs_znode_byteswap(void *buf, size_t size)
+{
+	znode_phys_t *zp = buf;
+
+	ASSERT(size >= sizeof (znode_phys_t));
+
+	zp->zp_crtime[0] = BSWAP_64(zp->zp_crtime[0]);
+	zp->zp_crtime[1] = BSWAP_64(zp->zp_crtime[1]);
+	zp->zp_atime[0] = BSWAP_64(zp->zp_atime[0]);
+	zp->zp_atime[1] = BSWAP_64(zp->zp_atime[1]);
+	zp->zp_mtime[0] = BSWAP_64(zp->zp_mtime[0]);
+	zp->zp_mtime[1] = BSWAP_64(zp->zp_mtime[1]);
+	zp->zp_ctime[0] = BSWAP_64(zp->zp_ctime[0]);
+	zp->zp_ctime[1] = BSWAP_64(zp->zp_ctime[1]);
+	zp->zp_gen = BSWAP_64(zp->zp_gen);
+	zp->zp_mode = BSWAP_64(zp->zp_mode);
+	zp->zp_size = BSWAP_64(zp->zp_size);
+	zp->zp_parent = BSWAP_64(zp->zp_parent);
+	zp->zp_links = BSWAP_64(zp->zp_links);
+	zp->zp_xattr = BSWAP_64(zp->zp_xattr);
+	zp->zp_rdev = BSWAP_64(zp->zp_rdev);
+	zp->zp_flags = BSWAP_64(zp->zp_flags);
+	zp->zp_uid = BSWAP_64(zp->zp_uid);
+	zp->zp_gid = BSWAP_64(zp->zp_gid);
+	zp->zp_zap = BSWAP_64(zp->zp_zap);
+	zp->zp_pad[0] = BSWAP_64(zp->zp_pad[0]);
+	zp->zp_pad[1] = BSWAP_64(zp->zp_pad[1]);
+	zp->zp_pad[2] = BSWAP_64(zp->zp_pad[2]);
+
+	zp->zp_acl.z_acl_extern_obj = BSWAP_64(zp->zp_acl.z_acl_extern_obj);
+	zp->zp_acl.z_acl_size = BSWAP_32(zp->zp_acl.z_acl_size);
+	zp->zp_acl.z_acl_version = BSWAP_16(zp->zp_acl.z_acl_version);
+	zp->zp_acl.z_acl_count = BSWAP_16(zp->zp_acl.z_acl_count);
+	if (zp->zp_acl.z_acl_version == ZFS_ACL_VERSION) {
+		zfs_acl_byteswap((void *)&zp->zp_acl.z_ace_data[0],
+		    ZFS_ACE_SPACE);
+	} else {
+		zfs_oldace_byteswap((ace_t *)&zp->zp_acl.z_ace_data[0],
+		    ACE_SLOT_CNT);
+	}
+}
diff --git a/uts/common/fs/zfs/zfs_ctldir.c b/uts/common/fs/zfs/zfs_ctldir.c
new file mode 100644
index 000000000000..815f8895e702
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_ctldir.c
@@ -0,0 +1,1349 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * ZFS control directory (a.k.a. ".zfs")
+ *
+ * This directory provides a common location for all ZFS meta-objects.
+ * Currently, this is only the 'snapshot' directory, but this may expand in the
+ * future.  The elements are built using the GFS primitives, as the hierarchy
+ * does not actually exist on disk.
+ *
+ * For 'snapshot', we don't want to have all snapshots always mounted, because
+ * this would take up a huge amount of space in /etc/mnttab.  We have three
+ * types of objects:
+ *
+ * 	ctldir ------> snapshotdir -------> snapshot
+ *                                             |
+ *                                             |
+ *                                             V
+ *                                         mounted fs
+ *
+ * The 'snapshot' node contains just enough information to lookup '..' and act
+ * as a mountpoint for the snapshot.  Whenever we lookup a specific snapshot, we
+ * perform an automount of the underlying filesystem and return the
+ * corresponding vnode.
+ *
+ * All mounts are handled automatically by the kernel, but unmounts are
+ * (currently) handled from user land.  The main reason is that there is no
+ * reliable way to auto-unmount the filesystem when it's "no longer in use".
+ * When the user unmounts a filesystem, we call zfsctl_unmount(), which
+ * unmounts any snapshots within the snapshot directory.
+ *
+ * The '.zfs', '.zfs/snapshot', and all directories created under
+ * '.zfs/snapshot' (ie: '.zfs/snapshot/<snapname>') are all GFS nodes and
+ * share the same vfs_t as the head filesystem (what '.zfs' lives under).
+ *
+ * File systems mounted ontop of the GFS nodes '.zfs/snapshot/<snapname>'
+ * (ie: snapshots) are ZFS nodes and have their own unique vfs_t.
+ * However, vnodes within these mounted on file systems have their v_vfsp
+ * fields set to the head filesystem to make NFS happy (see
+ * zfsctl_snapdir_lookup()). We VFS_HOLD the head filesystem's vfs_t
+ * so that it cannot be freed until all snapshots have been unmounted.
+ */
+
+#include <fs/fs_subr.h>
+#include <sys/zfs_ctldir.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/zfs_vfsops.h>
+#include <sys/vfs_opreg.h>
+#include <sys/gfs.h>
+#include <sys/stat.h>
+#include <sys/dmu.h>
+#include <sys/dsl_deleg.h>
+#include <sys/mount.h>
+#include <sys/sunddi.h>
+
+#include "zfs_namecheck.h"
+
+typedef struct zfsctl_node {
+	gfs_dir_t	zc_gfs_private;
+	uint64_t	zc_id;
+	timestruc_t	zc_cmtime;	/* ctime and mtime, always the same */
+} zfsctl_node_t;
+
+typedef struct zfsctl_snapdir {
+	zfsctl_node_t	sd_node;
+	kmutex_t	sd_lock;
+	avl_tree_t	sd_snaps;
+} zfsctl_snapdir_t;
+
+typedef struct {
+	char		*se_name;
+	vnode_t		*se_root;
+	avl_node_t	se_node;
+} zfs_snapentry_t;
+
+static int
+snapentry_compare(const void *a, const void *b)
+{
+	const zfs_snapentry_t *sa = a;
+	const zfs_snapentry_t *sb = b;
+	int ret = strcmp(sa->se_name, sb->se_name);
+
+	if (ret < 0)
+		return (-1);
+	else if (ret > 0)
+		return (1);
+	else
+		return (0);
+}
+
+vnodeops_t *zfsctl_ops_root;
+vnodeops_t *zfsctl_ops_snapdir;
+vnodeops_t *zfsctl_ops_snapshot;
+vnodeops_t *zfsctl_ops_shares;
+vnodeops_t *zfsctl_ops_shares_dir;
+
+static const fs_operation_def_t zfsctl_tops_root[];
+static const fs_operation_def_t zfsctl_tops_snapdir[];
+static const fs_operation_def_t zfsctl_tops_snapshot[];
+static const fs_operation_def_t zfsctl_tops_shares[];
+
+static vnode_t *zfsctl_mknode_snapdir(vnode_t *);
+static vnode_t *zfsctl_mknode_shares(vnode_t *);
+static vnode_t *zfsctl_snapshot_mknode(vnode_t *, uint64_t objset);
+static int zfsctl_unmount_snap(zfs_snapentry_t *, int, cred_t *);
+
+static gfs_opsvec_t zfsctl_opsvec[] = {
+	{ ".zfs", zfsctl_tops_root, &zfsctl_ops_root },
+	{ ".zfs/snapshot", zfsctl_tops_snapdir, &zfsctl_ops_snapdir },
+	{ ".zfs/snapshot/vnode", zfsctl_tops_snapshot, &zfsctl_ops_snapshot },
+	{ ".zfs/shares", zfsctl_tops_shares, &zfsctl_ops_shares_dir },
+	{ ".zfs/shares/vnode", zfsctl_tops_shares, &zfsctl_ops_shares },
+	{ NULL }
+};
+
+/*
+ * Root directory elements.  We only have two entries
+ * snapshot and shares.
+ */
+static gfs_dirent_t zfsctl_root_entries[] = {
+	{ "snapshot", zfsctl_mknode_snapdir, GFS_CACHE_VNODE },
+	{ "shares", zfsctl_mknode_shares, GFS_CACHE_VNODE },
+	{ NULL }
+};
+
+/* include . and .. in the calculation */
+#define	NROOT_ENTRIES	((sizeof (zfsctl_root_entries) / \
+    sizeof (gfs_dirent_t)) + 1)
+
+
+/*
+ * Initialize the various GFS pieces we'll need to create and manipulate .zfs
+ * directories.  This is called from the ZFS init routine, and initializes the
+ * vnode ops vectors that we'll be using.
+ */
+void
+zfsctl_init(void)
+{
+	VERIFY(gfs_make_opsvec(zfsctl_opsvec) == 0);
+}
+
+void
+zfsctl_fini(void)
+{
+	/*
+	 * Remove vfsctl vnode ops
+	 */
+	if (zfsctl_ops_root)
+		vn_freevnodeops(zfsctl_ops_root);
+	if (zfsctl_ops_snapdir)
+		vn_freevnodeops(zfsctl_ops_snapdir);
+	if (zfsctl_ops_snapshot)
+		vn_freevnodeops(zfsctl_ops_snapshot);
+	if (zfsctl_ops_shares)
+		vn_freevnodeops(zfsctl_ops_shares);
+	if (zfsctl_ops_shares_dir)
+		vn_freevnodeops(zfsctl_ops_shares_dir);
+
+	zfsctl_ops_root = NULL;
+	zfsctl_ops_snapdir = NULL;
+	zfsctl_ops_snapshot = NULL;
+	zfsctl_ops_shares = NULL;
+	zfsctl_ops_shares_dir = NULL;
+}
+
+boolean_t
+zfsctl_is_node(vnode_t *vp)
+{
+	return (vn_matchops(vp, zfsctl_ops_root) ||
+	    vn_matchops(vp, zfsctl_ops_snapdir) ||
+	    vn_matchops(vp, zfsctl_ops_snapshot) ||
+	    vn_matchops(vp, zfsctl_ops_shares) ||
+	    vn_matchops(vp, zfsctl_ops_shares_dir));
+
+}
+
+/*
+ * Return the inode number associated with the 'snapshot' or
+ * 'shares' directory.
+ */
+/* ARGSUSED */
+static ino64_t
+zfsctl_root_inode_cb(vnode_t *vp, int index)
+{
+	zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
+
+	ASSERT(index <= 2);
+
+	if (index == 0)
+		return (ZFSCTL_INO_SNAPDIR);
+
+	return (zfsvfs->z_shares_dir);
+}
+
+/*
+ * Create the '.zfs' directory.  This directory is cached as part of the VFS
+ * structure.  This results in a hold on the vfs_t.  The code in zfs_umount()
+ * therefore checks against a vfs_count of 2 instead of 1.  This reference
+ * is removed when the ctldir is destroyed in the unmount.
+ */
+void
+zfsctl_create(zfsvfs_t *zfsvfs)
+{
+	vnode_t *vp, *rvp;
+	zfsctl_node_t *zcp;
+	uint64_t crtime[2];
+
+	ASSERT(zfsvfs->z_ctldir == NULL);
+
+	vp = gfs_root_create(sizeof (zfsctl_node_t), zfsvfs->z_vfs,
+	    zfsctl_ops_root, ZFSCTL_INO_ROOT, zfsctl_root_entries,
+	    zfsctl_root_inode_cb, MAXNAMELEN, NULL, NULL);
+	zcp = vp->v_data;
+	zcp->zc_id = ZFSCTL_INO_ROOT;
+
+	VERIFY(VFS_ROOT(zfsvfs->z_vfs, &rvp) == 0);
+	VERIFY(0 == sa_lookup(VTOZ(rvp)->z_sa_hdl, SA_ZPL_CRTIME(zfsvfs),
+	    &crtime, sizeof (crtime)));
+	ZFS_TIME_DECODE(&zcp->zc_cmtime, crtime);
+	VN_RELE(rvp);
+
+	/*
+	 * We're only faking the fact that we have a root of a filesystem for
+	 * the sake of the GFS interfaces.  Undo the flag manipulation it did
+	 * for us.
+	 */
+	vp->v_flag &= ~(VROOT | VNOCACHE | VNOMAP | VNOSWAP | VNOMOUNT);
+
+	zfsvfs->z_ctldir = vp;
+}
+
+/*
+ * Destroy the '.zfs' directory.  Only called when the filesystem is unmounted.
+ * There might still be more references if we were force unmounted, but only
+ * new zfs_inactive() calls can occur and they don't reference .zfs
+ */
+void
+zfsctl_destroy(zfsvfs_t *zfsvfs)
+{
+	VN_RELE(zfsvfs->z_ctldir);
+	zfsvfs->z_ctldir = NULL;
+}
+
+/*
+ * Given a root znode, retrieve the associated .zfs directory.
+ * Add a hold to the vnode and return it.
+ */
+vnode_t *
+zfsctl_root(znode_t *zp)
+{
+	ASSERT(zfs_has_ctldir(zp));
+	VN_HOLD(zp->z_zfsvfs->z_ctldir);
+	return (zp->z_zfsvfs->z_ctldir);
+}
+
+/*
+ * Common open routine.  Disallow any write access.
+ */
+/* ARGSUSED */
+static int
+zfsctl_common_open(vnode_t **vpp, int flags, cred_t *cr, caller_context_t *ct)
+{
+	if (flags & FWRITE)
+		return (EACCES);
+
+	return (0);
+}
+
+/*
+ * Common close routine.  Nothing to do here.
+ */
+/* ARGSUSED */
+static int
+zfsctl_common_close(vnode_t *vpp, int flags, int count, offset_t off,
+    cred_t *cr, caller_context_t *ct)
+{
+	return (0);
+}
+
+/*
+ * Common access routine.  Disallow writes.
+ */
+/* ARGSUSED */
+static int
+zfsctl_common_access(vnode_t *vp, int mode, int flags, cred_t *cr,
+    caller_context_t *ct)
+{
+	if (flags & V_ACE_MASK) {
+		if (mode & ACE_ALL_WRITE_PERMS)
+			return (EACCES);
+	} else {
+		if (mode & VWRITE)
+			return (EACCES);
+	}
+
+	return (0);
+}
+
+/*
+ * Common getattr function.  Fill in basic information.
+ */
+static void
+zfsctl_common_getattr(vnode_t *vp, vattr_t *vap)
+{
+	timestruc_t	now;
+
+	vap->va_uid = 0;
+	vap->va_gid = 0;
+	vap->va_rdev = 0;
+	/*
+	 * We are a purely virtual object, so we have no
+	 * blocksize or allocated blocks.
+	 */
+	vap->va_blksize = 0;
+	vap->va_nblocks = 0;
+	vap->va_seq = 0;
+	vap->va_fsid = vp->v_vfsp->vfs_dev;
+	vap->va_mode = S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP |
+	    S_IROTH | S_IXOTH;
+	vap->va_type = VDIR;
+	/*
+	 * We live in the now (for atime).
+	 */
+	gethrestime(&now);
+	vap->va_atime = now;
+}
+
+/*ARGSUSED*/
+static int
+zfsctl_common_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct)
+{
+	zfsvfs_t	*zfsvfs = vp->v_vfsp->vfs_data;
+	zfsctl_node_t	*zcp = vp->v_data;
+	uint64_t	object = zcp->zc_id;
+	zfid_short_t	*zfid;
+	int		i;
+
+	ZFS_ENTER(zfsvfs);
+
+	if (fidp->fid_len < SHORT_FID_LEN) {
+		fidp->fid_len = SHORT_FID_LEN;
+		ZFS_EXIT(zfsvfs);
+		return (ENOSPC);
+	}
+
+	zfid = (zfid_short_t *)fidp;
+
+	zfid->zf_len = SHORT_FID_LEN;
+
+	for (i = 0; i < sizeof (zfid->zf_object); i++)
+		zfid->zf_object[i] = (uint8_t)(object >> (8 * i));
+
+	/* .zfs znodes always have a generation number of 0 */
+	for (i = 0; i < sizeof (zfid->zf_gen); i++)
+		zfid->zf_gen[i] = 0;
+
+	ZFS_EXIT(zfsvfs);
+	return (0);
+}
+
+
+/*ARGSUSED*/
+static int
+zfsctl_shares_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct)
+{
+	zfsvfs_t	*zfsvfs = vp->v_vfsp->vfs_data;
+	znode_t		*dzp;
+	int		error;
+
+	ZFS_ENTER(zfsvfs);
+
+	if (zfsvfs->z_shares_dir == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (ENOTSUP);
+	}
+
+	if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp)) == 0) {
+		error = VOP_FID(ZTOV(dzp), fidp, ct);
+		VN_RELE(ZTOV(dzp));
+	}
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+/*
+ * .zfs inode namespace
+ *
+ * We need to generate unique inode numbers for all files and directories
+ * within the .zfs pseudo-filesystem.  We use the following scheme:
+ *
+ * 	ENTRY			ZFSCTL_INODE
+ * 	.zfs			1
+ * 	.zfs/snapshot		2
+ * 	.zfs/snapshot/<snap>	objectid(snap)
+ */
+
+#define	ZFSCTL_INO_SNAP(id)	(id)
+
+/*
+ * Get root directory attributes.
+ */
+/* ARGSUSED */
+static int
+zfsctl_root_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
+    caller_context_t *ct)
+{
+	zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
+	zfsctl_node_t *zcp = vp->v_data;
+
+	ZFS_ENTER(zfsvfs);
+	vap->va_nodeid = ZFSCTL_INO_ROOT;
+	vap->va_nlink = vap->va_size = NROOT_ENTRIES;
+	vap->va_mtime = vap->va_ctime = zcp->zc_cmtime;
+
+	zfsctl_common_getattr(vp, vap);
+	ZFS_EXIT(zfsvfs);
+
+	return (0);
+}
+
+/*
+ * Special case the handling of "..".
+ */
+/* ARGSUSED */
+int
+zfsctl_root_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
+    int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct,
+    int *direntflags, pathname_t *realpnp)
+{
+	zfsvfs_t *zfsvfs = dvp->v_vfsp->vfs_data;
+	int err;
+
+	/*
+	 * No extended attributes allowed under .zfs
+	 */
+	if (flags & LOOKUP_XATTR)
+		return (EINVAL);
+
+	ZFS_ENTER(zfsvfs);
+
+	if (strcmp(nm, "..") == 0) {
+		err = VFS_ROOT(dvp->v_vfsp, vpp);
+	} else {
+		err = gfs_vop_lookup(dvp, nm, vpp, pnp, flags, rdir,
+		    cr, ct, direntflags, realpnp);
+	}
+
+	ZFS_EXIT(zfsvfs);
+
+	return (err);
+}
+
+static int
+zfsctl_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
+    caller_context_t *ct)
+{
+	/*
+	 * We only care about ACL_ENABLED so that libsec can
+	 * display ACL correctly and not default to POSIX draft.
+	 */
+	if (cmd == _PC_ACL_ENABLED) {
+		*valp = _ACL_ACE_ENABLED;
+		return (0);
+	}
+
+	return (fs_pathconf(vp, cmd, valp, cr, ct));
+}
+
+static const fs_operation_def_t zfsctl_tops_root[] = {
+	{ VOPNAME_OPEN,		{ .vop_open = zfsctl_common_open }	},
+	{ VOPNAME_CLOSE,	{ .vop_close = zfsctl_common_close }	},
+	{ VOPNAME_IOCTL,	{ .error = fs_inval }			},
+	{ VOPNAME_GETATTR,	{ .vop_getattr = zfsctl_root_getattr }	},
+	{ VOPNAME_ACCESS,	{ .vop_access = zfsctl_common_access }	},
+	{ VOPNAME_READDIR,	{ .vop_readdir = gfs_vop_readdir } 	},
+	{ VOPNAME_LOOKUP,	{ .vop_lookup = zfsctl_root_lookup }	},
+	{ VOPNAME_SEEK,		{ .vop_seek = fs_seek }			},
+	{ VOPNAME_INACTIVE,	{ .vop_inactive = gfs_vop_inactive }	},
+	{ VOPNAME_PATHCONF,	{ .vop_pathconf = zfsctl_pathconf }	},
+	{ VOPNAME_FID,		{ .vop_fid = zfsctl_common_fid	}	},
+	{ NULL }
+};
+
+static int
+zfsctl_snapshot_zname(vnode_t *vp, const char *name, int len, char *zname)
+{
+	objset_t *os = ((zfsvfs_t *)((vp)->v_vfsp->vfs_data))->z_os;
+
+	if (snapshot_namecheck(name, NULL, NULL) != 0)
+		return (EILSEQ);
+	dmu_objset_name(os, zname);
+	if (strlen(zname) + 1 + strlen(name) >= len)
+		return (ENAMETOOLONG);
+	(void) strcat(zname, "@");
+	(void) strcat(zname, name);
+	return (0);
+}
+
+static int
+zfsctl_unmount_snap(zfs_snapentry_t *sep, int fflags, cred_t *cr)
+{
+	vnode_t *svp = sep->se_root;
+	int error;
+
+	ASSERT(vn_ismntpt(svp));
+
+	/* this will be dropped by dounmount() */
+	if ((error = vn_vfswlock(svp)) != 0)
+		return (error);
+
+	VN_HOLD(svp);
+	error = dounmount(vn_mountedvfs(svp), fflags, cr);
+	if (error) {
+		VN_RELE(svp);
+		return (error);
+	}
+
+	/*
+	 * We can't use VN_RELE(), as that will try to invoke
+	 * zfsctl_snapdir_inactive(), which would cause us to destroy
+	 * the sd_lock mutex held by our caller.
+	 */
+	ASSERT(svp->v_count == 1);
+	gfs_vop_inactive(svp, cr, NULL);
+
+	kmem_free(sep->se_name, strlen(sep->se_name) + 1);
+	kmem_free(sep, sizeof (zfs_snapentry_t));
+
+	return (0);
+}
+
+static void
+zfsctl_rename_snap(zfsctl_snapdir_t *sdp, zfs_snapentry_t *sep, const char *nm)
+{
+	avl_index_t where;
+	vfs_t *vfsp;
+	refstr_t *pathref;
+	char newpath[MAXNAMELEN];
+	char *tail;
+
+	ASSERT(MUTEX_HELD(&sdp->sd_lock));
+	ASSERT(sep != NULL);
+
+	vfsp = vn_mountedvfs(sep->se_root);
+	ASSERT(vfsp != NULL);
+
+	vfs_lock_wait(vfsp);
+
+	/*
+	 * Change the name in the AVL tree.
+	 */
+	avl_remove(&sdp->sd_snaps, sep);
+	kmem_free(sep->se_name, strlen(sep->se_name) + 1);
+	sep->se_name = kmem_alloc(strlen(nm) + 1, KM_SLEEP);
+	(void) strcpy(sep->se_name, nm);
+	VERIFY(avl_find(&sdp->sd_snaps, sep, &where) == NULL);
+	avl_insert(&sdp->sd_snaps, sep, where);
+
+	/*
+	 * Change the current mountpoint info:
+	 * 	- update the tail of the mntpoint path
+	 *	- update the tail of the resource path
+	 */
+	pathref = vfs_getmntpoint(vfsp);
+	(void) strncpy(newpath, refstr_value(pathref), sizeof (newpath));
+	VERIFY((tail = strrchr(newpath, '/')) != NULL);
+	*(tail+1) = '\0';
+	ASSERT3U(strlen(newpath) + strlen(nm), <, sizeof (newpath));
+	(void) strcat(newpath, nm);
+	refstr_rele(pathref);
+	vfs_setmntpoint(vfsp, newpath, 0);
+
+	pathref = vfs_getresource(vfsp);
+	(void) strncpy(newpath, refstr_value(pathref), sizeof (newpath));
+	VERIFY((tail = strrchr(newpath, '@')) != NULL);
+	*(tail+1) = '\0';
+	ASSERT3U(strlen(newpath) + strlen(nm), <, sizeof (newpath));
+	(void) strcat(newpath, nm);
+	refstr_rele(pathref);
+	vfs_setresource(vfsp, newpath, 0);
+
+	vfs_unlock(vfsp);
+}
+
+/*ARGSUSED*/
+static int
+zfsctl_snapdir_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm,
+    cred_t *cr, caller_context_t *ct, int flags)
+{
+	zfsctl_snapdir_t *sdp = sdvp->v_data;
+	zfs_snapentry_t search, *sep;
+	zfsvfs_t *zfsvfs;
+	avl_index_t where;
+	char from[MAXNAMELEN], to[MAXNAMELEN];
+	char real[MAXNAMELEN];
+	int err;
+
+	zfsvfs = sdvp->v_vfsp->vfs_data;
+	ZFS_ENTER(zfsvfs);
+
+	if ((flags & FIGNORECASE) || zfsvfs->z_case == ZFS_CASE_INSENSITIVE) {
+		err = dmu_snapshot_realname(zfsvfs->z_os, snm, real,
+		    MAXNAMELEN, NULL);
+		if (err == 0) {
+			snm = real;
+		} else if (err != ENOTSUP) {
+			ZFS_EXIT(zfsvfs);
+			return (err);
+		}
+	}
+
+	ZFS_EXIT(zfsvfs);
+
+	err = zfsctl_snapshot_zname(sdvp, snm, MAXNAMELEN, from);
+	if (!err)
+		err = zfsctl_snapshot_zname(tdvp, tnm, MAXNAMELEN, to);
+	if (!err)
+		err = zfs_secpolicy_rename_perms(from, to, cr);
+	if (err)
+		return (err);
+
+	/*
+	 * Cannot move snapshots out of the snapdir.
+	 */
+	if (sdvp != tdvp)
+		return (EINVAL);
+
+	if (strcmp(snm, tnm) == 0)
+		return (0);
+
+	mutex_enter(&sdp->sd_lock);
+
+	search.se_name = (char *)snm;
+	if ((sep = avl_find(&sdp->sd_snaps, &search, &where)) == NULL) {
+		mutex_exit(&sdp->sd_lock);
+		return (ENOENT);
+	}
+
+	err = dmu_objset_rename(from, to, B_FALSE);
+	if (err == 0)
+		zfsctl_rename_snap(sdp, sep, tnm);
+
+	mutex_exit(&sdp->sd_lock);
+
+	return (err);
+}
+
+/* ARGSUSED */
+static int
+zfsctl_snapdir_remove(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr,
+    caller_context_t *ct, int flags)
+{
+	zfsctl_snapdir_t *sdp = dvp->v_data;
+	zfs_snapentry_t *sep;
+	zfs_snapentry_t search;
+	zfsvfs_t *zfsvfs;
+	char snapname[MAXNAMELEN];
+	char real[MAXNAMELEN];
+	int err;
+
+	zfsvfs = dvp->v_vfsp->vfs_data;
+	ZFS_ENTER(zfsvfs);
+
+	if ((flags & FIGNORECASE) || zfsvfs->z_case == ZFS_CASE_INSENSITIVE) {
+
+		err = dmu_snapshot_realname(zfsvfs->z_os, name, real,
+		    MAXNAMELEN, NULL);
+		if (err == 0) {
+			name = real;
+		} else if (err != ENOTSUP) {
+			ZFS_EXIT(zfsvfs);
+			return (err);
+		}
+	}
+
+	ZFS_EXIT(zfsvfs);
+
+	err = zfsctl_snapshot_zname(dvp, name, MAXNAMELEN, snapname);
+	if (!err)
+		err = zfs_secpolicy_destroy_perms(snapname, cr);
+	if (err)
+		return (err);
+
+	mutex_enter(&sdp->sd_lock);
+
+	search.se_name = name;
+	sep = avl_find(&sdp->sd_snaps, &search, NULL);
+	if (sep) {
+		avl_remove(&sdp->sd_snaps, sep);
+		err = zfsctl_unmount_snap(sep, MS_FORCE, cr);
+		if (err)
+			avl_add(&sdp->sd_snaps, sep);
+		else
+			err = dmu_objset_destroy(snapname, B_FALSE);
+	} else {
+		err = ENOENT;
+	}
+
+	mutex_exit(&sdp->sd_lock);
+
+	return (err);
+}
+
+/*
+ * This creates a snapshot under '.zfs/snapshot'.
+ */
+/* ARGSUSED */
+static int
+zfsctl_snapdir_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t  **vpp,
+    cred_t *cr, caller_context_t *cc, int flags, vsecattr_t *vsecp)
+{
+	zfsvfs_t *zfsvfs = dvp->v_vfsp->vfs_data;
+	char name[MAXNAMELEN];
+	int err;
+	static enum symfollow follow = NO_FOLLOW;
+	static enum uio_seg seg = UIO_SYSSPACE;
+
+	if (snapshot_namecheck(dirname, NULL, NULL) != 0)
+		return (EILSEQ);
+
+	dmu_objset_name(zfsvfs->z_os, name);
+
+	*vpp = NULL;
+
+	err = zfs_secpolicy_snapshot_perms(name, cr);
+	if (err)
+		return (err);
+
+	if (err == 0) {
+		err = dmu_objset_snapshot(name, dirname, NULL, NULL,
+		    B_FALSE, B_FALSE, -1);
+		if (err)
+			return (err);
+		err = lookupnameat(dirname, seg, follow, NULL, vpp, dvp);
+	}
+
+	return (err);
+}
+
+/*
+ * Lookup entry point for the 'snapshot' directory.  Try to open the
+ * snapshot if it exist, creating the pseudo filesystem vnode as necessary.
+ * Perform a mount of the associated dataset on top of the vnode.
+ */
+/* ARGSUSED */
+static int
+zfsctl_snapdir_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
+    int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct,
+    int *direntflags, pathname_t *realpnp)
+{
+	zfsctl_snapdir_t *sdp = dvp->v_data;
+	objset_t *snap;
+	char snapname[MAXNAMELEN];
+	char real[MAXNAMELEN];
+	char *mountpoint;
+	zfs_snapentry_t *sep, search;
+	struct mounta margs;
+	vfs_t *vfsp;
+	size_t mountpoint_len;
+	avl_index_t where;
+	zfsvfs_t *zfsvfs = dvp->v_vfsp->vfs_data;
+	int err;
+
+	/*
+	 * No extended attributes allowed under .zfs
+	 */
+	if (flags & LOOKUP_XATTR)
+		return (EINVAL);
+
+	ASSERT(dvp->v_type == VDIR);
+
+	/*
+	 * If we get a recursive call, that means we got called
+	 * from the domount() code while it was trying to look up the
+	 * spec (which looks like a local path for zfs).  We need to
+	 * add some flag to domount() to tell it not to do this lookup.
+	 */
+	if (MUTEX_HELD(&sdp->sd_lock))
+		return (ENOENT);
+
+	ZFS_ENTER(zfsvfs);
+
+	if (gfs_lookup_dot(vpp, dvp, zfsvfs->z_ctldir, nm) == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (0);
+	}
+
+	if (flags & FIGNORECASE) {
+		boolean_t conflict = B_FALSE;
+
+		err = dmu_snapshot_realname(zfsvfs->z_os, nm, real,
+		    MAXNAMELEN, &conflict);
+		if (err == 0) {
+			nm = real;
+		} else if (err != ENOTSUP) {
+			ZFS_EXIT(zfsvfs);
+			return (err);
+		}
+		if (realpnp)
+			(void) strlcpy(realpnp->pn_buf, nm,
+			    realpnp->pn_bufsize);
+		if (conflict && direntflags)
+			*direntflags = ED_CASE_CONFLICT;
+	}
+
+	mutex_enter(&sdp->sd_lock);
+	search.se_name = (char *)nm;
+	if ((sep = avl_find(&sdp->sd_snaps, &search, &where)) != NULL) {
+		*vpp = sep->se_root;
+		VN_HOLD(*vpp);
+		err = traverse(vpp);
+		if (err) {
+			VN_RELE(*vpp);
+			*vpp = NULL;
+		} else if (*vpp == sep->se_root) {
+			/*
+			 * The snapshot was unmounted behind our backs,
+			 * try to remount it.
+			 */
+			goto domount;
+		} else {
+			/*
+			 * VROOT was set during the traverse call.  We need
+			 * to clear it since we're pretending to be part
+			 * of our parent's vfs.
+			 */
+			(*vpp)->v_flag &= ~VROOT;
+		}
+		mutex_exit(&sdp->sd_lock);
+		ZFS_EXIT(zfsvfs);
+		return (err);
+	}
+
+	/*
+	 * The requested snapshot is not currently mounted, look it up.
+	 */
+	err = zfsctl_snapshot_zname(dvp, nm, MAXNAMELEN, snapname);
+	if (err) {
+		mutex_exit(&sdp->sd_lock);
+		ZFS_EXIT(zfsvfs);
+		/*
+		 * handle "ls *" or "?" in a graceful manner,
+		 * forcing EILSEQ to ENOENT.
+		 * Since shell ultimately passes "*" or "?" as name to lookup
+		 */
+		return (err == EILSEQ ? ENOENT : err);
+	}
+	if (dmu_objset_hold(snapname, FTAG, &snap) != 0) {
+		mutex_exit(&sdp->sd_lock);
+		ZFS_EXIT(zfsvfs);
+		return (ENOENT);
+	}
+
+	sep = kmem_alloc(sizeof (zfs_snapentry_t), KM_SLEEP);
+	sep->se_name = kmem_alloc(strlen(nm) + 1, KM_SLEEP);
+	(void) strcpy(sep->se_name, nm);
+	*vpp = sep->se_root = zfsctl_snapshot_mknode(dvp, dmu_objset_id(snap));
+	avl_insert(&sdp->sd_snaps, sep, where);
+
+	dmu_objset_rele(snap, FTAG);
+domount:
+	mountpoint_len = strlen(refstr_value(dvp->v_vfsp->vfs_mntpt)) +
+	    strlen("/.zfs/snapshot/") + strlen(nm) + 1;
+	mountpoint = kmem_alloc(mountpoint_len, KM_SLEEP);
+	(void) snprintf(mountpoint, mountpoint_len, "%s/.zfs/snapshot/%s",
+	    refstr_value(dvp->v_vfsp->vfs_mntpt), nm);
+
+	margs.spec = snapname;
+	margs.dir = mountpoint;
+	margs.flags = MS_SYSSPACE | MS_NOMNTTAB;
+	margs.fstype = "zfs";
+	margs.dataptr = NULL;
+	margs.datalen = 0;
+	margs.optptr = NULL;
+	margs.optlen = 0;
+
+	err = domount("zfs", &margs, *vpp, kcred, &vfsp);
+	kmem_free(mountpoint, mountpoint_len);
+
+	if (err == 0) {
+		/*
+		 * Return the mounted root rather than the covered mount point.
+		 * Takes the GFS vnode at .zfs/snapshot/<snapname> and returns
+		 * the ZFS vnode mounted on top of the GFS node.  This ZFS
+		 * vnode is the root of the newly created vfsp.
+		 */
+		VFS_RELE(vfsp);
+		err = traverse(vpp);
+	}
+
+	if (err == 0) {
+		/*
+		 * Fix up the root vnode mounted on .zfs/snapshot/<snapname>.
+		 *
+		 * This is where we lie about our v_vfsp in order to
+		 * make .zfs/snapshot/<snapname> accessible over NFS
+		 * without requiring manual mounts of <snapname>.
+		 */
+		ASSERT(VTOZ(*vpp)->z_zfsvfs != zfsvfs);
+		VTOZ(*vpp)->z_zfsvfs->z_parent = zfsvfs;
+		(*vpp)->v_vfsp = zfsvfs->z_vfs;
+		(*vpp)->v_flag &= ~VROOT;
+	}
+	mutex_exit(&sdp->sd_lock);
+	ZFS_EXIT(zfsvfs);
+
+	/*
+	 * If we had an error, drop our hold on the vnode and
+	 * zfsctl_snapshot_inactive() will clean up.
+	 */
+	if (err) {
+		VN_RELE(*vpp);
+		*vpp = NULL;
+	}
+	return (err);
+}
+
+/* ARGSUSED */
+static int
+zfsctl_shares_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
+    int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct,
+    int *direntflags, pathname_t *realpnp)
+{
+	zfsvfs_t *zfsvfs = dvp->v_vfsp->vfs_data;
+	znode_t *dzp;
+	int error;
+
+	ZFS_ENTER(zfsvfs);
+
+	if (gfs_lookup_dot(vpp, dvp, zfsvfs->z_ctldir, nm) == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (0);
+	}
+
+	if (zfsvfs->z_shares_dir == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (ENOTSUP);
+	}
+	if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp)) == 0)
+		error = VOP_LOOKUP(ZTOV(dzp), nm, vpp, pnp,
+		    flags, rdir, cr, ct, direntflags, realpnp);
+
+	VN_RELE(ZTOV(dzp));
+	ZFS_EXIT(zfsvfs);
+
+	return (error);
+}
+
+/* ARGSUSED */
+static int
+zfsctl_snapdir_readdir_cb(vnode_t *vp, void *dp, int *eofp,
+    offset_t *offp, offset_t *nextp, void *data, int flags)
+{
+	zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
+	char snapname[MAXNAMELEN];
+	uint64_t id, cookie;
+	boolean_t case_conflict;
+	int error;
+
+	ZFS_ENTER(zfsvfs);
+
+	cookie = *offp;
+	error = dmu_snapshot_list_next(zfsvfs->z_os, MAXNAMELEN, snapname, &id,
+	    &cookie, &case_conflict);
+	if (error) {
+		ZFS_EXIT(zfsvfs);
+		if (error == ENOENT) {
+			*eofp = 1;
+			return (0);
+		}
+		return (error);
+	}
+
+	if (flags & V_RDDIR_ENTFLAGS) {
+		edirent_t *eodp = dp;
+
+		(void) strcpy(eodp->ed_name, snapname);
+		eodp->ed_ino = ZFSCTL_INO_SNAP(id);
+		eodp->ed_eflags = case_conflict ? ED_CASE_CONFLICT : 0;
+	} else {
+		struct dirent64 *odp = dp;
+
+		(void) strcpy(odp->d_name, snapname);
+		odp->d_ino = ZFSCTL_INO_SNAP(id);
+	}
+	*nextp = cookie;
+
+	ZFS_EXIT(zfsvfs);
+
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+zfsctl_shares_readdir(vnode_t *vp, uio_t *uiop, cred_t *cr, int *eofp,
+    caller_context_t *ct, int flags)
+{
+	zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
+	znode_t *dzp;
+	int error;
+
+	ZFS_ENTER(zfsvfs);
+
+	if (zfsvfs->z_shares_dir == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (ENOTSUP);
+	}
+	if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp)) == 0) {
+		error = VOP_READDIR(ZTOV(dzp), uiop, cr, eofp, ct, flags);
+		VN_RELE(ZTOV(dzp));
+	} else {
+		*eofp = 1;
+		error = ENOENT;
+	}
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * pvp is the '.zfs' directory (zfsctl_node_t).
+ * Creates vp, which is '.zfs/snapshot' (zfsctl_snapdir_t).
+ *
+ * This function is the callback to create a GFS vnode for '.zfs/snapshot'
+ * when a lookup is performed on .zfs for "snapshot".
+ */
+vnode_t *
+zfsctl_mknode_snapdir(vnode_t *pvp)
+{
+	vnode_t *vp;
+	zfsctl_snapdir_t *sdp;
+
+	vp = gfs_dir_create(sizeof (zfsctl_snapdir_t), pvp,
+	    zfsctl_ops_snapdir, NULL, NULL, MAXNAMELEN,
+	    zfsctl_snapdir_readdir_cb, NULL);
+	sdp = vp->v_data;
+	sdp->sd_node.zc_id = ZFSCTL_INO_SNAPDIR;
+	sdp->sd_node.zc_cmtime = ((zfsctl_node_t *)pvp->v_data)->zc_cmtime;
+	mutex_init(&sdp->sd_lock, NULL, MUTEX_DEFAULT, NULL);
+	avl_create(&sdp->sd_snaps, snapentry_compare,
+	    sizeof (zfs_snapentry_t), offsetof(zfs_snapentry_t, se_node));
+	return (vp);
+}
+
+vnode_t *
+zfsctl_mknode_shares(vnode_t *pvp)
+{
+	vnode_t *vp;
+	zfsctl_node_t *sdp;
+
+	vp = gfs_dir_create(sizeof (zfsctl_node_t), pvp,
+	    zfsctl_ops_shares, NULL, NULL, MAXNAMELEN,
+	    NULL, NULL);
+	sdp = vp->v_data;
+	sdp->zc_cmtime = ((zfsctl_node_t *)pvp->v_data)->zc_cmtime;
+	return (vp);
+
+}
+
+/* ARGSUSED */
+static int
+zfsctl_shares_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
+    caller_context_t *ct)
+{
+	zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
+	znode_t *dzp;
+	int error;
+
+	ZFS_ENTER(zfsvfs);
+	if (zfsvfs->z_shares_dir == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (ENOTSUP);
+	}
+	if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp)) == 0) {
+		error = VOP_GETATTR(ZTOV(dzp), vap, flags, cr, ct);
+		VN_RELE(ZTOV(dzp));
+	}
+	ZFS_EXIT(zfsvfs);
+	return (error);
+
+
+}
+
+/* ARGSUSED */
+static int
+zfsctl_snapdir_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
+    caller_context_t *ct)
+{
+	zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
+	zfsctl_snapdir_t *sdp = vp->v_data;
+
+	ZFS_ENTER(zfsvfs);
+	zfsctl_common_getattr(vp, vap);
+	vap->va_nodeid = gfs_file_inode(vp);
+	vap->va_nlink = vap->va_size = avl_numnodes(&sdp->sd_snaps) + 2;
+	vap->va_ctime = vap->va_mtime = dmu_objset_snap_cmtime(zfsvfs->z_os);
+	ZFS_EXIT(zfsvfs);
+
+	return (0);
+}
+
+/* ARGSUSED */
+static void
+zfsctl_snapdir_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
+{
+	zfsctl_snapdir_t *sdp = vp->v_data;
+	void *private;
+
+	private = gfs_dir_inactive(vp);
+	if (private != NULL) {
+		ASSERT(avl_numnodes(&sdp->sd_snaps) == 0);
+		mutex_destroy(&sdp->sd_lock);
+		avl_destroy(&sdp->sd_snaps);
+		kmem_free(private, sizeof (zfsctl_snapdir_t));
+	}
+}
+
+static const fs_operation_def_t zfsctl_tops_snapdir[] = {
+	{ VOPNAME_OPEN,		{ .vop_open = zfsctl_common_open }	},
+	{ VOPNAME_CLOSE,	{ .vop_close = zfsctl_common_close }	},
+	{ VOPNAME_IOCTL,	{ .error = fs_inval }			},
+	{ VOPNAME_GETATTR,	{ .vop_getattr = zfsctl_snapdir_getattr } },
+	{ VOPNAME_ACCESS,	{ .vop_access = zfsctl_common_access }	},
+	{ VOPNAME_RENAME,	{ .vop_rename = zfsctl_snapdir_rename }	},
+	{ VOPNAME_RMDIR,	{ .vop_rmdir = zfsctl_snapdir_remove }	},
+	{ VOPNAME_MKDIR,	{ .vop_mkdir = zfsctl_snapdir_mkdir }	},
+	{ VOPNAME_READDIR,	{ .vop_readdir = gfs_vop_readdir }	},
+	{ VOPNAME_LOOKUP,	{ .vop_lookup = zfsctl_snapdir_lookup }	},
+	{ VOPNAME_SEEK,		{ .vop_seek = fs_seek }			},
+	{ VOPNAME_INACTIVE,	{ .vop_inactive = zfsctl_snapdir_inactive } },
+	{ VOPNAME_FID,		{ .vop_fid = zfsctl_common_fid }	},
+	{ NULL }
+};
+
+static const fs_operation_def_t zfsctl_tops_shares[] = {
+	{ VOPNAME_OPEN,		{ .vop_open = zfsctl_common_open }	},
+	{ VOPNAME_CLOSE,	{ .vop_close = zfsctl_common_close }	},
+	{ VOPNAME_IOCTL,	{ .error = fs_inval }			},
+	{ VOPNAME_GETATTR,	{ .vop_getattr = zfsctl_shares_getattr } },
+	{ VOPNAME_ACCESS,	{ .vop_access = zfsctl_common_access }	},
+	{ VOPNAME_READDIR,	{ .vop_readdir = zfsctl_shares_readdir } },
+	{ VOPNAME_LOOKUP,	{ .vop_lookup = zfsctl_shares_lookup }	},
+	{ VOPNAME_SEEK,		{ .vop_seek = fs_seek }			},
+	{ VOPNAME_INACTIVE,	{ .vop_inactive = gfs_vop_inactive } },
+	{ VOPNAME_FID,		{ .vop_fid = zfsctl_shares_fid } },
+	{ NULL }
+};
+
+/*
+ * pvp is the GFS vnode '.zfs/snapshot'.
+ *
+ * This creates a GFS node under '.zfs/snapshot' representing each
+ * snapshot.  This newly created GFS node is what we mount snapshot
+ * vfs_t's ontop of.
+ */
+static vnode_t *
+zfsctl_snapshot_mknode(vnode_t *pvp, uint64_t objset)
+{
+	vnode_t *vp;
+	zfsctl_node_t *zcp;
+
+	vp = gfs_dir_create(sizeof (zfsctl_node_t), pvp,
+	    zfsctl_ops_snapshot, NULL, NULL, MAXNAMELEN, NULL, NULL);
+	zcp = vp->v_data;
+	zcp->zc_id = objset;
+
+	return (vp);
+}
+
+static void
+zfsctl_snapshot_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
+{
+	zfsctl_snapdir_t *sdp;
+	zfs_snapentry_t *sep, *next;
+	vnode_t *dvp;
+
+	VERIFY(gfs_dir_lookup(vp, "..", &dvp, cr, 0, NULL, NULL) == 0);
+	sdp = dvp->v_data;
+
+	mutex_enter(&sdp->sd_lock);
+
+	if (vp->v_count > 1) {
+		mutex_exit(&sdp->sd_lock);
+		return;
+	}
+	ASSERT(!vn_ismntpt(vp));
+
+	sep = avl_first(&sdp->sd_snaps);
+	while (sep != NULL) {
+		next = AVL_NEXT(&sdp->sd_snaps, sep);
+
+		if (sep->se_root == vp) {
+			avl_remove(&sdp->sd_snaps, sep);
+			kmem_free(sep->se_name, strlen(sep->se_name) + 1);
+			kmem_free(sep, sizeof (zfs_snapentry_t));
+			break;
+		}
+		sep = next;
+	}
+	ASSERT(sep != NULL);
+
+	mutex_exit(&sdp->sd_lock);
+	VN_RELE(dvp);
+
+	/*
+	 * Dispose of the vnode for the snapshot mount point.
+	 * This is safe to do because once this entry has been removed
+	 * from the AVL tree, it can't be found again, so cannot become
+	 * "active".  If we lookup the same name again we will end up
+	 * creating a new vnode.
+	 */
+	gfs_vop_inactive(vp, cr, ct);
+}
+
+
+/*
+ * These VP's should never see the light of day.  They should always
+ * be covered.
+ */
+static const fs_operation_def_t zfsctl_tops_snapshot[] = {
+	VOPNAME_INACTIVE, { .vop_inactive =  zfsctl_snapshot_inactive },
+	NULL, NULL
+};
+
+int
+zfsctl_lookup_objset(vfs_t *vfsp, uint64_t objsetid, zfsvfs_t **zfsvfsp)
+{
+	zfsvfs_t *zfsvfs = vfsp->vfs_data;
+	vnode_t *dvp, *vp;
+	zfsctl_snapdir_t *sdp;
+	zfsctl_node_t *zcp;
+	zfs_snapentry_t *sep;
+	int error;
+
+	ASSERT(zfsvfs->z_ctldir != NULL);
+	error = zfsctl_root_lookup(zfsvfs->z_ctldir, "snapshot", &dvp,
+	    NULL, 0, NULL, kcred, NULL, NULL, NULL);
+	if (error != 0)
+		return (error);
+	sdp = dvp->v_data;
+
+	mutex_enter(&sdp->sd_lock);
+	sep = avl_first(&sdp->sd_snaps);
+	while (sep != NULL) {
+		vp = sep->se_root;
+		zcp = vp->v_data;
+		if (zcp->zc_id == objsetid)
+			break;
+
+		sep = AVL_NEXT(&sdp->sd_snaps, sep);
+	}
+
+	if (sep != NULL) {
+		VN_HOLD(vp);
+		/*
+		 * Return the mounted root rather than the covered mount point.
+		 * Takes the GFS vnode at .zfs/snapshot/<snapshot objsetid>
+		 * and returns the ZFS vnode mounted on top of the GFS node.
+		 * This ZFS vnode is the root of the vfs for objset 'objsetid'.
+		 */
+		error = traverse(&vp);
+		if (error == 0) {
+			if (vp == sep->se_root)
+				error = EINVAL;
+			else
+				*zfsvfsp = VTOZ(vp)->z_zfsvfs;
+		}
+		mutex_exit(&sdp->sd_lock);
+		VN_RELE(vp);
+	} else {
+		error = EINVAL;
+		mutex_exit(&sdp->sd_lock);
+	}
+
+	VN_RELE(dvp);
+
+	return (error);
+}
+
+/*
+ * Unmount any snapshots for the given filesystem.  This is called from
+ * zfs_umount() - if we have a ctldir, then go through and unmount all the
+ * snapshots.
+ */
+int
+zfsctl_umount_snapshots(vfs_t *vfsp, int fflags, cred_t *cr)
+{
+	zfsvfs_t *zfsvfs = vfsp->vfs_data;
+	vnode_t *dvp;
+	zfsctl_snapdir_t *sdp;
+	zfs_snapentry_t *sep, *next;
+	int error;
+
+	ASSERT(zfsvfs->z_ctldir != NULL);
+	error = zfsctl_root_lookup(zfsvfs->z_ctldir, "snapshot", &dvp,
+	    NULL, 0, NULL, cr, NULL, NULL, NULL);
+	if (error != 0)
+		return (error);
+	sdp = dvp->v_data;
+
+	mutex_enter(&sdp->sd_lock);
+
+	sep = avl_first(&sdp->sd_snaps);
+	while (sep != NULL) {
+		next = AVL_NEXT(&sdp->sd_snaps, sep);
+
+		/*
+		 * If this snapshot is not mounted, then it must
+		 * have just been unmounted by somebody else, and
+		 * will be cleaned up by zfsctl_snapdir_inactive().
+		 */
+		if (vn_ismntpt(sep->se_root)) {
+			avl_remove(&sdp->sd_snaps, sep);
+			error = zfsctl_unmount_snap(sep, fflags, cr);
+			if (error) {
+				avl_add(&sdp->sd_snaps, sep);
+				break;
+			}
+		}
+		sep = next;
+	}
+
+	mutex_exit(&sdp->sd_lock);
+	VN_RELE(dvp);
+
+	return (error);
+}
diff --git a/uts/common/fs/zfs/zfs_debug.c b/uts/common/fs/zfs/zfs_debug.c
new file mode 100644
index 000000000000..d0f411a99350
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_debug.c
@@ -0,0 +1,95 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+
+list_t zfs_dbgmsgs;
+int zfs_dbgmsg_size;
+kmutex_t zfs_dbgmsgs_lock;
+int zfs_dbgmsg_maxsize = 1<<20; /* 1MB */
+
+void
+zfs_dbgmsg_init(void)
+{
+	list_create(&zfs_dbgmsgs, sizeof (zfs_dbgmsg_t),
+	    offsetof(zfs_dbgmsg_t, zdm_node));
+	mutex_init(&zfs_dbgmsgs_lock, NULL, MUTEX_DEFAULT, NULL);
+}
+
+void
+zfs_dbgmsg_fini(void)
+{
+	zfs_dbgmsg_t *zdm;
+
+	while ((zdm = list_remove_head(&zfs_dbgmsgs)) != NULL) {
+		int size = sizeof (zfs_dbgmsg_t) + strlen(zdm->zdm_msg);
+		kmem_free(zdm, size);
+		zfs_dbgmsg_size -= size;
+	}
+	mutex_destroy(&zfs_dbgmsgs_lock);
+	ASSERT3U(zfs_dbgmsg_size, ==, 0);
+}
+
+/*
+ * Print these messages by running:
+ * 	echo ::zfs_dbgmsg | mdb -k
+ *
+ * Monitor these messages by running:
+ * 	dtrace -q -n 'zfs-dbgmsg{printf("%s\n", stringof(arg0))}'
+ */
+void
+zfs_dbgmsg(const char *fmt, ...)
+{
+	int size;
+	va_list adx;
+	zfs_dbgmsg_t *zdm;
+
+	va_start(adx, fmt);
+	size = vsnprintf(NULL, 0, fmt, adx);
+	va_end(adx);
+
+	/*
+	 * There is one byte of string in sizeof (zfs_dbgmsg_t), used
+	 * for the terminating null.
+	 */
+	zdm = kmem_alloc(sizeof (zfs_dbgmsg_t) + size, KM_SLEEP);
+	zdm->zdm_timestamp = gethrestime_sec();
+
+	va_start(adx, fmt);
+	(void) vsnprintf(zdm->zdm_msg, size + 1, fmt, adx);
+	va_end(adx);
+
+	DTRACE_PROBE1(zfs__dbgmsg, char *, zdm->zdm_msg);
+
+	mutex_enter(&zfs_dbgmsgs_lock);
+	list_insert_tail(&zfs_dbgmsgs, zdm);
+	zfs_dbgmsg_size += sizeof (zfs_dbgmsg_t) + size;
+	while (zfs_dbgmsg_size > zfs_dbgmsg_maxsize) {
+		zdm = list_remove_head(&zfs_dbgmsgs);
+		size = sizeof (zfs_dbgmsg_t) + strlen(zdm->zdm_msg);
+		kmem_free(zdm, size);
+		zfs_dbgmsg_size -= size;
+	}
+	mutex_exit(&zfs_dbgmsgs_lock);
+}
diff --git a/uts/common/fs/zfs/zfs_dir.c b/uts/common/fs/zfs/zfs_dir.c
new file mode 100644
index 000000000000..b06d29ab33e1
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_dir.c
@@ -0,0 +1,1089 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/resource.h>
+#include <sys/vfs.h>
+#include <sys/vnode.h>
+#include <sys/file.h>
+#include <sys/mode.h>
+#include <sys/kmem.h>
+#include <sys/uio.h>
+#include <sys/pathname.h>
+#include <sys/cmn_err.h>
+#include <sys/errno.h>
+#include <sys/stat.h>
+#include <sys/unistd.h>
+#include <sys/sunddi.h>
+#include <sys/random.h>
+#include <sys/policy.h>
+#include <sys/zfs_dir.h>
+#include <sys/zfs_acl.h>
+#include <sys/fs/zfs.h>
+#include "fs/fs_subr.h"
+#include <sys/zap.h>
+#include <sys/dmu.h>
+#include <sys/atomic.h>
+#include <sys/zfs_ctldir.h>
+#include <sys/zfs_fuid.h>
+#include <sys/sa.h>
+#include <sys/zfs_sa.h>
+#include <sys/dnlc.h>
+#include <sys/extdirent.h>
+
+/*
+ * zfs_match_find() is used by zfs_dirent_lock() to peform zap lookups
+ * of names after deciding which is the appropriate lookup interface.
+ */
+static int
+zfs_match_find(zfsvfs_t *zfsvfs, znode_t *dzp, char *name, boolean_t exact,
+    boolean_t update, int *deflags, pathname_t *rpnp, uint64_t *zoid)
+{
+	int error;
+
+	if (zfsvfs->z_norm) {
+		matchtype_t mt = MT_FIRST;
+		boolean_t conflict = B_FALSE;
+		size_t bufsz = 0;
+		char *buf = NULL;
+
+		if (rpnp) {
+			buf = rpnp->pn_buf;
+			bufsz = rpnp->pn_bufsize;
+		}
+		if (exact)
+			mt = MT_EXACT;
+		/*
+		 * In the non-mixed case we only expect there would ever
+		 * be one match, but we need to use the normalizing lookup.
+		 */
+		error = zap_lookup_norm(zfsvfs->z_os, dzp->z_id, name, 8, 1,
+		    zoid, mt, buf, bufsz, &conflict);
+		if (!error && deflags)
+			*deflags = conflict ? ED_CASE_CONFLICT : 0;
+	} else {
+		error = zap_lookup(zfsvfs->z_os, dzp->z_id, name, 8, 1, zoid);
+	}
+	*zoid = ZFS_DIRENT_OBJ(*zoid);
+
+	if (error == ENOENT && update)
+		dnlc_update(ZTOV(dzp), name, DNLC_NO_VNODE);
+
+	return (error);
+}
+
+/*
+ * Lock a directory entry.  A dirlock on <dzp, name> protects that name
+ * in dzp's directory zap object.  As long as you hold a dirlock, you can
+ * assume two things: (1) dzp cannot be reaped, and (2) no other thread
+ * can change the zap entry for (i.e. link or unlink) this name.
+ *
+ * Input arguments:
+ *	dzp	- znode for directory
+ *	name	- name of entry to lock
+ *	flag	- ZNEW: if the entry already exists, fail with EEXIST.
+ *		  ZEXISTS: if the entry does not exist, fail with ENOENT.
+ *		  ZSHARED: allow concurrent access with other ZSHARED callers.
+ *		  ZXATTR: we want dzp's xattr directory
+ *		  ZCILOOK: On a mixed sensitivity file system,
+ *			   this lookup should be case-insensitive.
+ *		  ZCIEXACT: On a purely case-insensitive file system,
+ *			    this lookup should be case-sensitive.
+ *		  ZRENAMING: we are locking for renaming, force narrow locks
+ *		  ZHAVELOCK: Don't grab the z_name_lock for this call. The
+ *			     current thread already holds it.
+ *
+ * Output arguments:
+ *	zpp	- pointer to the znode for the entry (NULL if there isn't one)
+ *	dlpp	- pointer to the dirlock for this entry (NULL on error)
+ *      direntflags - (case-insensitive lookup only)
+ *		flags if multiple case-sensitive matches exist in directory
+ *      realpnp     - (case-insensitive lookup only)
+ *		actual name matched within the directory
+ *
+ * Return value: 0 on success or errno on failure.
+ *
+ * NOTE: Always checks for, and rejects, '.' and '..'.
+ * NOTE: For case-insensitive file systems we take wide locks (see below),
+ *	 but return znode pointers to a single match.
+ */
+int
+zfs_dirent_lock(zfs_dirlock_t **dlpp, znode_t *dzp, char *name, znode_t **zpp,
+    int flag, int *direntflags, pathname_t *realpnp)
+{
+	zfsvfs_t	*zfsvfs = dzp->z_zfsvfs;
+	zfs_dirlock_t	*dl;
+	boolean_t	update;
+	boolean_t	exact;
+	uint64_t	zoid;
+	vnode_t		*vp = NULL;
+	int		error = 0;
+	int		cmpflags;
+
+	*zpp = NULL;
+	*dlpp = NULL;
+
+	/*
+	 * Verify that we are not trying to lock '.', '..', or '.zfs'
+	 */
+	if (name[0] == '.' &&
+	    (name[1] == '\0' || (name[1] == '.' && name[2] == '\0')) ||
+	    zfs_has_ctldir(dzp) && strcmp(name, ZFS_CTLDIR_NAME) == 0)
+		return (EEXIST);
+
+	/*
+	 * Case sensitivity and normalization preferences are set when
+	 * the file system is created.  These are stored in the
+	 * zfsvfs->z_case and zfsvfs->z_norm fields.  These choices
+	 * affect what vnodes can be cached in the DNLC, how we
+	 * perform zap lookups, and the "width" of our dirlocks.
+	 *
+	 * A normal dirlock locks a single name.  Note that with
+	 * normalization a name can be composed multiple ways, but
+	 * when normalized, these names all compare equal.  A wide
+	 * dirlock locks multiple names.  We need these when the file
+	 * system is supporting mixed-mode access.  It is sometimes
+	 * necessary to lock all case permutations of file name at
+	 * once so that simultaneous case-insensitive/case-sensitive
+	 * behaves as rationally as possible.
+	 */
+
+	/*
+	 * Decide if exact matches should be requested when performing
+	 * a zap lookup on file systems supporting case-insensitive
+	 * access.
+	 */
+	exact =
+	    ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE) && (flag & ZCIEXACT)) ||
+	    ((zfsvfs->z_case == ZFS_CASE_MIXED) && !(flag & ZCILOOK));
+
+	/*
+	 * Only look in or update the DNLC if we are looking for the
+	 * name on a file system that does not require normalization
+	 * or case folding.  We can also look there if we happen to be
+	 * on a non-normalizing, mixed sensitivity file system IF we
+	 * are looking for the exact name.
+	 *
+	 * Maybe can add TO-UPPERed version of name to dnlc in ci-only
+	 * case for performance improvement?
+	 */
+	update = !zfsvfs->z_norm ||
+	    ((zfsvfs->z_case == ZFS_CASE_MIXED) &&
+	    !(zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER) && !(flag & ZCILOOK));
+
+	/*
+	 * ZRENAMING indicates we are in a situation where we should
+	 * take narrow locks regardless of the file system's
+	 * preferences for normalizing and case folding.  This will
+	 * prevent us deadlocking trying to grab the same wide lock
+	 * twice if the two names happen to be case-insensitive
+	 * matches.
+	 */
+	if (flag & ZRENAMING)
+		cmpflags = 0;
+	else
+		cmpflags = zfsvfs->z_norm;
+
+	/*
+	 * Wait until there are no locks on this name.
+	 *
+	 * Don't grab the the lock if it is already held. However, cannot
+	 * have both ZSHARED and ZHAVELOCK together.
+	 */
+	ASSERT(!(flag & ZSHARED) || !(flag & ZHAVELOCK));
+	if (!(flag & ZHAVELOCK))
+		rw_enter(&dzp->z_name_lock, RW_READER);
+
+	mutex_enter(&dzp->z_lock);
+	for (;;) {
+		if (dzp->z_unlinked) {
+			mutex_exit(&dzp->z_lock);
+			if (!(flag & ZHAVELOCK))
+				rw_exit(&dzp->z_name_lock);
+			return (ENOENT);
+		}
+		for (dl = dzp->z_dirlocks; dl != NULL; dl = dl->dl_next) {
+			if ((u8_strcmp(name, dl->dl_name, 0, cmpflags,
+			    U8_UNICODE_LATEST, &error) == 0) || error != 0)
+				break;
+		}
+		if (error != 0) {
+			mutex_exit(&dzp->z_lock);
+			if (!(flag & ZHAVELOCK))
+				rw_exit(&dzp->z_name_lock);
+			return (ENOENT);
+		}
+		if (dl == NULL)	{
+			/*
+			 * Allocate a new dirlock and add it to the list.
+			 */
+			dl = kmem_alloc(sizeof (zfs_dirlock_t), KM_SLEEP);
+			cv_init(&dl->dl_cv, NULL, CV_DEFAULT, NULL);
+			dl->dl_name = name;
+			dl->dl_sharecnt = 0;
+			dl->dl_namelock = 0;
+			dl->dl_namesize = 0;
+			dl->dl_dzp = dzp;
+			dl->dl_next = dzp->z_dirlocks;
+			dzp->z_dirlocks = dl;
+			break;
+		}
+		if ((flag & ZSHARED) && dl->dl_sharecnt != 0)
+			break;
+		cv_wait(&dl->dl_cv, &dzp->z_lock);
+	}
+
+	/*
+	 * If the z_name_lock was NOT held for this dirlock record it.
+	 */
+	if (flag & ZHAVELOCK)
+		dl->dl_namelock = 1;
+
+	if ((flag & ZSHARED) && ++dl->dl_sharecnt > 1 && dl->dl_namesize == 0) {
+		/*
+		 * We're the second shared reference to dl.  Make a copy of
+		 * dl_name in case the first thread goes away before we do.
+		 * Note that we initialize the new name before storing its
+		 * pointer into dl_name, because the first thread may load
+		 * dl->dl_name at any time.  He'll either see the old value,
+		 * which is his, or the new shared copy; either is OK.
+		 */
+		dl->dl_namesize = strlen(dl->dl_name) + 1;
+		name = kmem_alloc(dl->dl_namesize, KM_SLEEP);
+		bcopy(dl->dl_name, name, dl->dl_namesize);
+		dl->dl_name = name;
+	}
+
+	mutex_exit(&dzp->z_lock);
+
+	/*
+	 * We have a dirlock on the name.  (Note that it is the dirlock,
+	 * not the dzp's z_lock, that protects the name in the zap object.)
+	 * See if there's an object by this name; if so, put a hold on it.
+	 */
+	if (flag & ZXATTR) {
+		error = sa_lookup(dzp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), &zoid,
+		    sizeof (zoid));
+		if (error == 0)
+			error = (zoid == 0 ? ENOENT : 0);
+	} else {
+		if (update)
+			vp = dnlc_lookup(ZTOV(dzp), name);
+		if (vp == DNLC_NO_VNODE) {
+			VN_RELE(vp);
+			error = ENOENT;
+		} else if (vp) {
+			if (flag & ZNEW) {
+				zfs_dirent_unlock(dl);
+				VN_RELE(vp);
+				return (EEXIST);
+			}
+			*dlpp = dl;
+			*zpp = VTOZ(vp);
+			return (0);
+		} else {
+			error = zfs_match_find(zfsvfs, dzp, name, exact,
+			    update, direntflags, realpnp, &zoid);
+		}
+	}
+	if (error) {
+		if (error != ENOENT || (flag & ZEXISTS)) {
+			zfs_dirent_unlock(dl);
+			return (error);
+		}
+	} else {
+		if (flag & ZNEW) {
+			zfs_dirent_unlock(dl);
+			return (EEXIST);
+		}
+		error = zfs_zget(zfsvfs, zoid, zpp);
+		if (error) {
+			zfs_dirent_unlock(dl);
+			return (error);
+		}
+		if (!(flag & ZXATTR) && update)
+			dnlc_update(ZTOV(dzp), name, ZTOV(*zpp));
+	}
+
+	*dlpp = dl;
+
+	return (0);
+}
+
+/*
+ * Unlock this directory entry and wake anyone who was waiting for it.
+ */
+void
+zfs_dirent_unlock(zfs_dirlock_t *dl)
+{
+	znode_t *dzp = dl->dl_dzp;
+	zfs_dirlock_t **prev_dl, *cur_dl;
+
+	mutex_enter(&dzp->z_lock);
+
+	if (!dl->dl_namelock)
+		rw_exit(&dzp->z_name_lock);
+
+	if (dl->dl_sharecnt > 1) {
+		dl->dl_sharecnt--;
+		mutex_exit(&dzp->z_lock);
+		return;
+	}
+	prev_dl = &dzp->z_dirlocks;
+	while ((cur_dl = *prev_dl) != dl)
+		prev_dl = &cur_dl->dl_next;
+	*prev_dl = dl->dl_next;
+	cv_broadcast(&dl->dl_cv);
+	mutex_exit(&dzp->z_lock);
+
+	if (dl->dl_namesize != 0)
+		kmem_free(dl->dl_name, dl->dl_namesize);
+	cv_destroy(&dl->dl_cv);
+	kmem_free(dl, sizeof (*dl));
+}
+
+/*
+ * Look up an entry in a directory.
+ *
+ * NOTE: '.' and '..' are handled as special cases because
+ *	no directory entries are actually stored for them.  If this is
+ *	the root of a filesystem, then '.zfs' is also treated as a
+ *	special pseudo-directory.
+ */
+int
+zfs_dirlook(znode_t *dzp, char *name, vnode_t **vpp, int flags,
+    int *deflg, pathname_t *rpnp)
+{
+	zfs_dirlock_t *dl;
+	znode_t *zp;
+	int error = 0;
+	uint64_t parent;
+
+	if (name[0] == 0 || (name[0] == '.' && name[1] == 0)) {
+		*vpp = ZTOV(dzp);
+		VN_HOLD(*vpp);
+	} else if (name[0] == '.' && name[1] == '.' && name[2] == 0) {
+		zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
+
+		/*
+		 * If we are a snapshot mounted under .zfs, return
+		 * the vp for the snapshot directory.
+		 */
+		if ((error = sa_lookup(dzp->z_sa_hdl,
+		    SA_ZPL_PARENT(zfsvfs), &parent, sizeof (parent))) != 0)
+			return (error);
+		if (parent == dzp->z_id && zfsvfs->z_parent != zfsvfs) {
+			error = zfsctl_root_lookup(zfsvfs->z_parent->z_ctldir,
+			    "snapshot", vpp, NULL, 0, NULL, kcred,
+			    NULL, NULL, NULL);
+			return (error);
+		}
+		rw_enter(&dzp->z_parent_lock, RW_READER);
+		error = zfs_zget(zfsvfs, parent, &zp);
+		if (error == 0)
+			*vpp = ZTOV(zp);
+		rw_exit(&dzp->z_parent_lock);
+	} else if (zfs_has_ctldir(dzp) && strcmp(name, ZFS_CTLDIR_NAME) == 0) {
+		*vpp = zfsctl_root(dzp);
+	} else {
+		int zf;
+
+		zf = ZEXISTS | ZSHARED;
+		if (flags & FIGNORECASE)
+			zf |= ZCILOOK;
+
+		error = zfs_dirent_lock(&dl, dzp, name, &zp, zf, deflg, rpnp);
+		if (error == 0) {
+			*vpp = ZTOV(zp);
+			zfs_dirent_unlock(dl);
+			dzp->z_zn_prefetch = B_TRUE; /* enable prefetching */
+		}
+		rpnp = NULL;
+	}
+
+	if ((flags & FIGNORECASE) && rpnp && !error)
+		(void) strlcpy(rpnp->pn_buf, name, rpnp->pn_bufsize);
+
+	return (error);
+}
+
+/*
+ * unlinked Set (formerly known as the "delete queue") Error Handling
+ *
+ * When dealing with the unlinked set, we dmu_tx_hold_zap(), but we
+ * don't specify the name of the entry that we will be manipulating.  We
+ * also fib and say that we won't be adding any new entries to the
+ * unlinked set, even though we might (this is to lower the minimum file
+ * size that can be deleted in a full filesystem).  So on the small
+ * chance that the nlink list is using a fat zap (ie. has more than
+ * 2000 entries), we *may* not pre-read a block that's needed.
+ * Therefore it is remotely possible for some of the assertions
+ * regarding the unlinked set below to fail due to i/o error.  On a
+ * nondebug system, this will result in the space being leaked.
+ */
+void
+zfs_unlinked_add(znode_t *zp, dmu_tx_t *tx)
+{
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+
+	ASSERT(zp->z_unlinked);
+	ASSERT(zp->z_links == 0);
+
+	VERIFY3U(0, ==,
+	    zap_add_int(zfsvfs->z_os, zfsvfs->z_unlinkedobj, zp->z_id, tx));
+}
+
+/*
+ * Clean up any znodes that had no links when we either crashed or
+ * (force) umounted the file system.
+ */
+void
+zfs_unlinked_drain(zfsvfs_t *zfsvfs)
+{
+	zap_cursor_t	zc;
+	zap_attribute_t zap;
+	dmu_object_info_t doi;
+	znode_t		*zp;
+	int		error;
+
+	/*
+	 * Interate over the contents of the unlinked set.
+	 */
+	for (zap_cursor_init(&zc, zfsvfs->z_os, zfsvfs->z_unlinkedobj);
+	    zap_cursor_retrieve(&zc, &zap) == 0;
+	    zap_cursor_advance(&zc)) {
+
+		/*
+		 * See what kind of object we have in list
+		 */
+
+		error = dmu_object_info(zfsvfs->z_os,
+		    zap.za_first_integer, &doi);
+		if (error != 0)
+			continue;
+
+		ASSERT((doi.doi_type == DMU_OT_PLAIN_FILE_CONTENTS) ||
+		    (doi.doi_type == DMU_OT_DIRECTORY_CONTENTS));
+		/*
+		 * We need to re-mark these list entries for deletion,
+		 * so we pull them back into core and set zp->z_unlinked.
+		 */
+		error = zfs_zget(zfsvfs, zap.za_first_integer, &zp);
+
+		/*
+		 * We may pick up znodes that are already marked for deletion.
+		 * This could happen during the purge of an extended attribute
+		 * directory.  All we need to do is skip over them, since they
+		 * are already in the system marked z_unlinked.
+		 */
+		if (error != 0)
+			continue;
+
+		zp->z_unlinked = B_TRUE;
+		VN_RELE(ZTOV(zp));
+	}
+	zap_cursor_fini(&zc);
+}
+
+/*
+ * Delete the entire contents of a directory.  Return a count
+ * of the number of entries that could not be deleted. If we encounter
+ * an error, return a count of at least one so that the directory stays
+ * in the unlinked set.
+ *
+ * NOTE: this function assumes that the directory is inactive,
+ *	so there is no need to lock its entries before deletion.
+ *	Also, it assumes the directory contents is *only* regular
+ *	files.
+ */
+static int
+zfs_purgedir(znode_t *dzp)
+{
+	zap_cursor_t	zc;
+	zap_attribute_t	zap;
+	znode_t		*xzp;
+	dmu_tx_t	*tx;
+	zfsvfs_t	*zfsvfs = dzp->z_zfsvfs;
+	zfs_dirlock_t	dl;
+	int skipped = 0;
+	int error;
+
+	for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
+	    (error = zap_cursor_retrieve(&zc, &zap)) == 0;
+	    zap_cursor_advance(&zc)) {
+		error = zfs_zget(zfsvfs,
+		    ZFS_DIRENT_OBJ(zap.za_first_integer), &xzp);
+		if (error) {
+			skipped += 1;
+			continue;
+		}
+
+		ASSERT((ZTOV(xzp)->v_type == VREG) ||
+		    (ZTOV(xzp)->v_type == VLNK));
+
+		tx = dmu_tx_create(zfsvfs->z_os);
+		dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE);
+		dmu_tx_hold_zap(tx, dzp->z_id, FALSE, zap.za_name);
+		dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE);
+		dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+		/* Is this really needed ? */
+		zfs_sa_upgrade_txholds(tx, xzp);
+		error = dmu_tx_assign(tx, TXG_WAIT);
+		if (error) {
+			dmu_tx_abort(tx);
+			VN_RELE(ZTOV(xzp));
+			skipped += 1;
+			continue;
+		}
+		bzero(&dl, sizeof (dl));
+		dl.dl_dzp = dzp;
+		dl.dl_name = zap.za_name;
+
+		error = zfs_link_destroy(&dl, xzp, tx, 0, NULL);
+		if (error)
+			skipped += 1;
+		dmu_tx_commit(tx);
+
+		VN_RELE(ZTOV(xzp));
+	}
+	zap_cursor_fini(&zc);
+	if (error != ENOENT)
+		skipped += 1;
+	return (skipped);
+}
+
+void
+zfs_rmnode(znode_t *zp)
+{
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	objset_t	*os = zfsvfs->z_os;
+	znode_t		*xzp = NULL;
+	dmu_tx_t	*tx;
+	uint64_t	acl_obj;
+	uint64_t	xattr_obj;
+	int		error;
+
+	ASSERT(zp->z_links == 0);
+	ASSERT(ZTOV(zp)->v_count == 0);
+
+	/*
+	 * If this is an attribute directory, purge its contents.
+	 */
+	if (ZTOV(zp)->v_type == VDIR && (zp->z_pflags & ZFS_XATTR)) {
+		if (zfs_purgedir(zp) != 0) {
+			/*
+			 * Not enough space to delete some xattrs.
+			 * Leave it in the unlinked set.
+			 */
+			zfs_znode_dmu_fini(zp);
+			zfs_znode_free(zp);
+			return;
+		}
+	}
+
+	/*
+	 * Free up all the data in the file.
+	 */
+	error = dmu_free_long_range(os, zp->z_id, 0, DMU_OBJECT_END);
+	if (error) {
+		/*
+		 * Not enough space.  Leave the file in the unlinked set.
+		 */
+		zfs_znode_dmu_fini(zp);
+		zfs_znode_free(zp);
+		return;
+	}
+
+	/*
+	 * If the file has extended attributes, we're going to unlink
+	 * the xattr dir.
+	 */
+	error = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
+	    &xattr_obj, sizeof (xattr_obj));
+	if (error == 0 && xattr_obj) {
+		error = zfs_zget(zfsvfs, xattr_obj, &xzp);
+		ASSERT(error == 0);
+	}
+
+	acl_obj = zfs_external_acl(zp);
+
+	/*
+	 * Set up the final transaction.
+	 */
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_free(tx, zp->z_id, 0, DMU_OBJECT_END);
+	dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+	if (xzp) {
+		dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, TRUE, NULL);
+		dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE);
+	}
+	if (acl_obj)
+		dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END);
+
+	zfs_sa_upgrade_txholds(tx, zp);
+	error = dmu_tx_assign(tx, TXG_WAIT);
+	if (error) {
+		/*
+		 * Not enough space to delete the file.  Leave it in the
+		 * unlinked set, leaking it until the fs is remounted (at
+		 * which point we'll call zfs_unlinked_drain() to process it).
+		 */
+		dmu_tx_abort(tx);
+		zfs_znode_dmu_fini(zp);
+		zfs_znode_free(zp);
+		goto out;
+	}
+
+	if (xzp) {
+		ASSERT(error == 0);
+		mutex_enter(&xzp->z_lock);
+		xzp->z_unlinked = B_TRUE;	/* mark xzp for deletion */
+		xzp->z_links = 0;	/* no more links to it */
+		VERIFY(0 == sa_update(xzp->z_sa_hdl, SA_ZPL_LINKS(zfsvfs),
+		    &xzp->z_links, sizeof (xzp->z_links), tx));
+		mutex_exit(&xzp->z_lock);
+		zfs_unlinked_add(xzp, tx);
+	}
+
+	/* Remove this znode from the unlinked set */
+	VERIFY3U(0, ==,
+	    zap_remove_int(zfsvfs->z_os, zfsvfs->z_unlinkedobj, zp->z_id, tx));
+
+	zfs_znode_delete(zp, tx);
+
+	dmu_tx_commit(tx);
+out:
+	if (xzp)
+		VN_RELE(ZTOV(xzp));
+}
+
+static uint64_t
+zfs_dirent(znode_t *zp, uint64_t mode)
+{
+	uint64_t de = zp->z_id;
+
+	if (zp->z_zfsvfs->z_version >= ZPL_VERSION_DIRENT_TYPE)
+		de |= IFTODT(mode) << 60;
+	return (de);
+}
+
+/*
+ * Link zp into dl.  Can only fail if zp has been unlinked.
+ */
+int
+zfs_link_create(zfs_dirlock_t *dl, znode_t *zp, dmu_tx_t *tx, int flag)
+{
+	znode_t *dzp = dl->dl_dzp;
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	vnode_t *vp = ZTOV(zp);
+	uint64_t value;
+	int zp_is_dir = (vp->v_type == VDIR);
+	sa_bulk_attr_t bulk[5];
+	uint64_t mtime[2], ctime[2];
+	int count = 0;
+	int error;
+
+	mutex_enter(&zp->z_lock);
+
+	if (!(flag & ZRENAMING)) {
+		if (zp->z_unlinked) {	/* no new links to unlinked zp */
+			ASSERT(!(flag & (ZNEW | ZEXISTS)));
+			mutex_exit(&zp->z_lock);
+			return (ENOENT);
+		}
+		zp->z_links++;
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs), NULL,
+		    &zp->z_links, sizeof (zp->z_links));
+
+	}
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL,
+	    &dzp->z_id, sizeof (dzp->z_id));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+	    &zp->z_pflags, sizeof (zp->z_pflags));
+
+	if (!(flag & ZNEW)) {
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
+		    ctime, sizeof (ctime));
+		zfs_tstamp_update_setup(zp, STATE_CHANGED, mtime,
+		    ctime, B_TRUE);
+	}
+	error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
+	ASSERT(error == 0);
+
+	mutex_exit(&zp->z_lock);
+
+	mutex_enter(&dzp->z_lock);
+	dzp->z_size++;
+	dzp->z_links += zp_is_dir;
+	count = 0;
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
+	    &dzp->z_size, sizeof (dzp->z_size));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs), NULL,
+	    &dzp->z_links, sizeof (dzp->z_links));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
+	    mtime, sizeof (mtime));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
+	    ctime, sizeof (ctime));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+	    &dzp->z_pflags, sizeof (dzp->z_pflags));
+	zfs_tstamp_update_setup(dzp, CONTENT_MODIFIED, mtime, ctime, B_TRUE);
+	error = sa_bulk_update(dzp->z_sa_hdl, bulk, count, tx);
+	ASSERT(error == 0);
+	mutex_exit(&dzp->z_lock);
+
+	value = zfs_dirent(zp, zp->z_mode);
+	error = zap_add(zp->z_zfsvfs->z_os, dzp->z_id, dl->dl_name,
+	    8, 1, &value, tx);
+	ASSERT(error == 0);
+
+	dnlc_update(ZTOV(dzp), dl->dl_name, vp);
+
+	return (0);
+}
+
+static int
+zfs_dropname(zfs_dirlock_t *dl, znode_t *zp, znode_t *dzp, dmu_tx_t *tx,
+    int flag)
+{
+	int error;
+
+	if (zp->z_zfsvfs->z_norm) {
+		if (((zp->z_zfsvfs->z_case == ZFS_CASE_INSENSITIVE) &&
+		    (flag & ZCIEXACT)) ||
+		    ((zp->z_zfsvfs->z_case == ZFS_CASE_MIXED) &&
+		    !(flag & ZCILOOK)))
+			error = zap_remove_norm(zp->z_zfsvfs->z_os,
+			    dzp->z_id, dl->dl_name, MT_EXACT, tx);
+		else
+			error = zap_remove_norm(zp->z_zfsvfs->z_os,
+			    dzp->z_id, dl->dl_name, MT_FIRST, tx);
+	} else {
+		error = zap_remove(zp->z_zfsvfs->z_os,
+		    dzp->z_id, dl->dl_name, tx);
+	}
+
+	return (error);
+}
+
+/*
+ * Unlink zp from dl, and mark zp for deletion if this was the last link.
+ * Can fail if zp is a mount point (EBUSY) or a non-empty directory (EEXIST).
+ * If 'unlinkedp' is NULL, we put unlinked znodes on the unlinked list.
+ * If it's non-NULL, we use it to indicate whether the znode needs deletion,
+ * and it's the caller's job to do it.
+ */
+int
+zfs_link_destroy(zfs_dirlock_t *dl, znode_t *zp, dmu_tx_t *tx, int flag,
+	boolean_t *unlinkedp)
+{
+	znode_t *dzp = dl->dl_dzp;
+	zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
+	vnode_t *vp = ZTOV(zp);
+	int zp_is_dir = (vp->v_type == VDIR);
+	boolean_t unlinked = B_FALSE;
+	sa_bulk_attr_t bulk[5];
+	uint64_t mtime[2], ctime[2];
+	int count = 0;
+	int error;
+
+	dnlc_remove(ZTOV(dzp), dl->dl_name);
+
+	if (!(flag & ZRENAMING)) {
+		if (vn_vfswlock(vp))		/* prevent new mounts on zp */
+			return (EBUSY);
+
+		if (vn_ismntpt(vp)) {		/* don't remove mount point */
+			vn_vfsunlock(vp);
+			return (EBUSY);
+		}
+
+		mutex_enter(&zp->z_lock);
+
+		if (zp_is_dir && !zfs_dirempty(zp)) {
+			mutex_exit(&zp->z_lock);
+			vn_vfsunlock(vp);
+			return (EEXIST);
+		}
+
+		/*
+		 * If we get here, we are going to try to remove the object.
+		 * First try removing the name from the directory; if that
+		 * fails, return the error.
+		 */
+		error = zfs_dropname(dl, zp, dzp, tx, flag);
+		if (error != 0) {
+			mutex_exit(&zp->z_lock);
+			vn_vfsunlock(vp);
+			return (error);
+		}
+
+		if (zp->z_links <= zp_is_dir) {
+			zfs_panic_recover("zfs: link count on %s is %u, "
+			    "should be at least %u",
+			    zp->z_vnode->v_path ? zp->z_vnode->v_path :
+			    "<unknown>", (int)zp->z_links,
+			    zp_is_dir + 1);
+			zp->z_links = zp_is_dir + 1;
+		}
+		if (--zp->z_links == zp_is_dir) {
+			zp->z_unlinked = B_TRUE;
+			zp->z_links = 0;
+			unlinked = B_TRUE;
+		} else {
+			SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs),
+			    NULL, &ctime, sizeof (ctime));
+			SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs),
+			    NULL, &zp->z_pflags, sizeof (zp->z_pflags));
+			zfs_tstamp_update_setup(zp, STATE_CHANGED, mtime, ctime,
+			    B_TRUE);
+		}
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs),
+		    NULL, &zp->z_links, sizeof (zp->z_links));
+		error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
+		count = 0;
+		ASSERT(error == 0);
+		mutex_exit(&zp->z_lock);
+		vn_vfsunlock(vp);
+	} else {
+		error = zfs_dropname(dl, zp, dzp, tx, flag);
+		if (error != 0)
+			return (error);
+	}
+
+	mutex_enter(&dzp->z_lock);
+	dzp->z_size--;		/* one dirent removed */
+	dzp->z_links -= zp_is_dir;	/* ".." link from zp */
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs),
+	    NULL, &dzp->z_links, sizeof (dzp->z_links));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs),
+	    NULL, &dzp->z_size, sizeof (dzp->z_size));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs),
+	    NULL, ctime, sizeof (ctime));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs),
+	    NULL, mtime, sizeof (mtime));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs),
+	    NULL, &dzp->z_pflags, sizeof (dzp->z_pflags));
+	zfs_tstamp_update_setup(dzp, CONTENT_MODIFIED, mtime, ctime, B_TRUE);
+	error = sa_bulk_update(dzp->z_sa_hdl, bulk, count, tx);
+	ASSERT(error == 0);
+	mutex_exit(&dzp->z_lock);
+
+	if (unlinkedp != NULL)
+		*unlinkedp = unlinked;
+	else if (unlinked)
+		zfs_unlinked_add(zp, tx);
+
+	return (0);
+}
+
+/*
+ * Indicate whether the directory is empty.  Works with or without z_lock
+ * held, but can only be consider a hint in the latter case.  Returns true
+ * if only "." and ".." remain and there's no work in progress.
+ */
+boolean_t
+zfs_dirempty(znode_t *dzp)
+{
+	return (dzp->z_size == 2 && dzp->z_dirlocks == 0);
+}
+
+int
+zfs_make_xattrdir(znode_t *zp, vattr_t *vap, vnode_t **xvpp, cred_t *cr)
+{
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	znode_t *xzp;
+	dmu_tx_t *tx;
+	int error;
+	zfs_acl_ids_t acl_ids;
+	boolean_t fuid_dirtied;
+	uint64_t parent;
+
+	*xvpp = NULL;
+
+	if (error = zfs_zaccess(zp, ACE_WRITE_NAMED_ATTRS, 0, B_FALSE, cr))
+		return (error);
+
+	if ((error = zfs_acl_ids_create(zp, IS_XATTR, vap, cr, NULL,
+	    &acl_ids)) != 0)
+		return (error);
+	if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) {
+		zfs_acl_ids_free(&acl_ids);
+		return (EDQUOT);
+	}
+
+top:
+	tx = dmu_tx_create(zfsvfs->z_os);
+	dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
+	    ZFS_SA_BASE_ATTR_SIZE);
+	dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+	dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
+	fuid_dirtied = zfsvfs->z_fuid_dirty;
+	if (fuid_dirtied)
+		zfs_fuid_txhold(zfsvfs, tx);
+	error = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (error) {
+		if (error == ERESTART) {
+			dmu_tx_wait(tx);
+			dmu_tx_abort(tx);
+			goto top;
+		}
+		zfs_acl_ids_free(&acl_ids);
+		dmu_tx_abort(tx);
+		return (error);
+	}
+	zfs_mknode(zp, vap, tx, cr, IS_XATTR, &xzp, &acl_ids);
+
+	if (fuid_dirtied)
+		zfs_fuid_sync(zfsvfs, tx);
+
+#ifdef DEBUG
+	error = sa_lookup(xzp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
+	    &parent, sizeof (parent));
+	ASSERT(error == 0 && parent == zp->z_id);
+#endif
+
+	VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), &xzp->z_id,
+	    sizeof (xzp->z_id), tx));
+
+	(void) zfs_log_create(zfsvfs->z_log, tx, TX_MKXATTR, zp,
+	    xzp, "", NULL, acl_ids.z_fuidp, vap);
+
+	zfs_acl_ids_free(&acl_ids);
+	dmu_tx_commit(tx);
+
+	*xvpp = ZTOV(xzp);
+
+	return (0);
+}
+
+/*
+ * Return a znode for the extended attribute directory for zp.
+ * ** If the directory does not already exist, it is created **
+ *
+ *	IN:	zp	- znode to obtain attribute directory from
+ *		cr	- credentials of caller
+ *		flags	- flags from the VOP_LOOKUP call
+ *
+ *	OUT:	xzpp	- pointer to extended attribute znode
+ *
+ *	RETURN:	0 on success
+ *		error number on failure
+ */
+int
+zfs_get_xattrdir(znode_t *zp, vnode_t **xvpp, cred_t *cr, int flags)
+{
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	znode_t		*xzp;
+	zfs_dirlock_t	*dl;
+	vattr_t		va;
+	int		error;
+top:
+	error = zfs_dirent_lock(&dl, zp, "", &xzp, ZXATTR, NULL, NULL);
+	if (error)
+		return (error);
+
+	if (xzp != NULL) {
+		*xvpp = ZTOV(xzp);
+		zfs_dirent_unlock(dl);
+		return (0);
+	}
+
+
+	if (!(flags & CREATE_XATTR_DIR)) {
+		zfs_dirent_unlock(dl);
+		return (ENOENT);
+	}
+
+	if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) {
+		zfs_dirent_unlock(dl);
+		return (EROFS);
+	}
+
+	/*
+	 * The ability to 'create' files in an attribute
+	 * directory comes from the write_xattr permission on the base file.
+	 *
+	 * The ability to 'search' an attribute directory requires
+	 * read_xattr permission on the base file.
+	 *
+	 * Once in a directory the ability to read/write attributes
+	 * is controlled by the permissions on the attribute file.
+	 */
+	va.va_mask = AT_TYPE | AT_MODE | AT_UID | AT_GID;
+	va.va_type = VDIR;
+	va.va_mode = S_IFDIR | S_ISVTX | 0777;
+	zfs_fuid_map_ids(zp, cr, &va.va_uid, &va.va_gid);
+
+	error = zfs_make_xattrdir(zp, &va, xvpp, cr);
+	zfs_dirent_unlock(dl);
+
+	if (error == ERESTART) {
+		/* NB: we already did dmu_tx_wait() if necessary */
+		goto top;
+	}
+
+	return (error);
+}
+
+/*
+ * Decide whether it is okay to remove within a sticky directory.
+ *
+ * In sticky directories, write access is not sufficient;
+ * you can remove entries from a directory only if:
+ *
+ *	you own the directory,
+ *	you own the entry,
+ *	the entry is a plain file and you have write access,
+ *	or you are privileged (checked in secpolicy...).
+ *
+ * The function returns 0 if remove access is granted.
+ */
+int
+zfs_sticky_remove_access(znode_t *zdp, znode_t *zp, cred_t *cr)
+{
+	uid_t  		uid;
+	uid_t		downer;
+	uid_t		fowner;
+	zfsvfs_t	*zfsvfs = zdp->z_zfsvfs;
+
+	if (zdp->z_zfsvfs->z_replay)
+		return (0);
+
+	if ((zdp->z_mode & S_ISVTX) == 0)
+		return (0);
+
+	downer = zfs_fuid_map_id(zfsvfs, zdp->z_uid, cr, ZFS_OWNER);
+	fowner = zfs_fuid_map_id(zfsvfs, zp->z_uid, cr, ZFS_OWNER);
+
+	if ((uid = crgetuid(cr)) == downer || uid == fowner ||
+	    (ZTOV(zp)->v_type == VREG &&
+	    zfs_zaccess(zp, ACE_WRITE_DATA, 0, B_FALSE, cr) == 0))
+		return (0);
+	else
+		return (secpolicy_vnode_remove(cr));
+}
diff --git a/uts/common/fs/zfs/zfs_fm.c b/uts/common/fs/zfs/zfs_fm.c
new file mode 100644
index 000000000000..0b4812666442
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_fm.c
@@ -0,0 +1,863 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/spa.h>
+#include <sys/spa_impl.h>
+#include <sys/vdev.h>
+#include <sys/vdev_impl.h>
+#include <sys/zio.h>
+#include <sys/zio_checksum.h>
+
+#include <sys/fm/fs/zfs.h>
+#include <sys/fm/protocol.h>
+#include <sys/fm/util.h>
+#include <sys/sysevent.h>
+
+/*
+ * This general routine is responsible for generating all the different ZFS
+ * ereports.  The payload is dependent on the class, and which arguments are
+ * supplied to the function:
+ *
+ * 	EREPORT			POOL	VDEV	IO
+ * 	block			X	X	X
+ * 	data			X		X
+ * 	device			X	X
+ * 	pool			X
+ *
+ * If we are in a loading state, all errors are chained together by the same
+ * SPA-wide ENA (Error Numeric Association).
+ *
+ * For isolated I/O requests, we get the ENA from the zio_t. The propagation
+ * gets very complicated due to RAID-Z, gang blocks, and vdev caching.  We want
+ * to chain together all ereports associated with a logical piece of data.  For
+ * read I/Os, there  are basically three 'types' of I/O, which form a roughly
+ * layered diagram:
+ *
+ *      +---------------+
+ * 	| Aggregate I/O |	No associated logical data or device
+ * 	+---------------+
+ *              |
+ *              V
+ * 	+---------------+	Reads associated with a piece of logical data.
+ * 	|   Read I/O    |	This includes reads on behalf of RAID-Z,
+ * 	+---------------+       mirrors, gang blocks, retries, etc.
+ *              |
+ *              V
+ * 	+---------------+	Reads associated with a particular device, but
+ * 	| Physical I/O  |	no logical data.  Issued as part of vdev caching
+ * 	+---------------+	and I/O aggregation.
+ *
+ * Note that 'physical I/O' here is not the same terminology as used in the rest
+ * of ZIO.  Typically, 'physical I/O' simply means that there is no attached
+ * blockpointer.  But I/O with no associated block pointer can still be related
+ * to a logical piece of data (i.e. RAID-Z requests).
+ *
+ * Purely physical I/O always have unique ENAs.  They are not related to a
+ * particular piece of logical data, and therefore cannot be chained together.
+ * We still generate an ereport, but the DE doesn't correlate it with any
+ * logical piece of data.  When such an I/O fails, the delegated I/O requests
+ * will issue a retry, which will trigger the 'real' ereport with the correct
+ * ENA.
+ *
+ * We keep track of the ENA for a ZIO chain through the 'io_logical' member.
+ * When a new logical I/O is issued, we set this to point to itself.  Child I/Os
+ * then inherit this pointer, so that when it is first set subsequent failures
+ * will use the same ENA.  For vdev cache fill and queue aggregation I/O,
+ * this pointer is set to NULL, and no ereport will be generated (since it
+ * doesn't actually correspond to any particular device or piece of data,
+ * and the caller will always retry without caching or queueing anyway).
+ *
+ * For checksum errors, we want to include more information about the actual
+ * error which occurs.  Accordingly, we build an ereport when the error is
+ * noticed, but instead of sending it in immediately, we hang it off of the
+ * io_cksum_report field of the logical IO.  When the logical IO completes
+ * (successfully or not), zfs_ereport_finish_checksum() is called with the
+ * good and bad versions of the buffer (if available), and we annotate the
+ * ereport with information about the differences.
+ */
+#ifdef _KERNEL
+static void
+zfs_ereport_start(nvlist_t **ereport_out, nvlist_t **detector_out,
+    const char *subclass, spa_t *spa, vdev_t *vd, zio_t *zio,
+    uint64_t stateoroffset, uint64_t size)
+{
+	nvlist_t *ereport, *detector;
+
+	uint64_t ena;
+	char class[64];
+
+	/*
+	 * If we are doing a spa_tryimport() or in recovery mode,
+	 * ignore errors.
+	 */
+	if (spa_load_state(spa) == SPA_LOAD_TRYIMPORT ||
+	    spa_load_state(spa) == SPA_LOAD_RECOVER)
+		return;
+
+	/*
+	 * If we are in the middle of opening a pool, and the previous attempt
+	 * failed, don't bother logging any new ereports - we're just going to
+	 * get the same diagnosis anyway.
+	 */
+	if (spa_load_state(spa) != SPA_LOAD_NONE &&
+	    spa->spa_last_open_failed)
+		return;
+
+	if (zio != NULL) {
+		/*
+		 * If this is not a read or write zio, ignore the error.  This
+		 * can occur if the DKIOCFLUSHWRITECACHE ioctl fails.
+		 */
+		if (zio->io_type != ZIO_TYPE_READ &&
+		    zio->io_type != ZIO_TYPE_WRITE)
+			return;
+
+		/*
+		 * Ignore any errors from speculative I/Os, as failure is an
+		 * expected result.
+		 */
+		if (zio->io_flags & ZIO_FLAG_SPECULATIVE)
+			return;
+
+		/*
+		 * If this I/O is not a retry I/O, don't post an ereport.
+		 * Otherwise, we risk making bad diagnoses based on B_FAILFAST
+		 * I/Os.
+		 */
+		if (zio->io_error == EIO &&
+		    !(zio->io_flags & ZIO_FLAG_IO_RETRY))
+			return;
+
+		if (vd != NULL) {
+			/*
+			 * If the vdev has already been marked as failing due
+			 * to a failed probe, then ignore any subsequent I/O
+			 * errors, as the DE will automatically fault the vdev
+			 * on the first such failure.  This also catches cases
+			 * where vdev_remove_wanted is set and the device has
+			 * not yet been asynchronously placed into the REMOVED
+			 * state.
+			 */
+			if (zio->io_vd == vd && !vdev_accessible(vd, zio))
+				return;
+
+			/*
+			 * Ignore checksum errors for reads from DTL regions of
+			 * leaf vdevs.
+			 */
+			if (zio->io_type == ZIO_TYPE_READ &&
+			    zio->io_error == ECKSUM &&
+			    vd->vdev_ops->vdev_op_leaf &&
+			    vdev_dtl_contains(vd, DTL_MISSING, zio->io_txg, 1))
+				return;
+		}
+	}
+
+	/*
+	 * For probe failure, we want to avoid posting ereports if we've
+	 * already removed the device in the meantime.
+	 */
+	if (vd != NULL &&
+	    strcmp(subclass, FM_EREPORT_ZFS_PROBE_FAILURE) == 0 &&
+	    (vd->vdev_remove_wanted || vd->vdev_state == VDEV_STATE_REMOVED))
+		return;
+
+	if ((ereport = fm_nvlist_create(NULL)) == NULL)
+		return;
+
+	if ((detector = fm_nvlist_create(NULL)) == NULL) {
+		fm_nvlist_destroy(ereport, FM_NVA_FREE);
+		return;
+	}
+
+	/*
+	 * Serialize ereport generation
+	 */
+	mutex_enter(&spa->spa_errlist_lock);
+
+	/*
+	 * Determine the ENA to use for this event.  If we are in a loading
+	 * state, use a SPA-wide ENA.  Otherwise, if we are in an I/O state, use
+	 * a root zio-wide ENA.  Otherwise, simply use a unique ENA.
+	 */
+	if (spa_load_state(spa) != SPA_LOAD_NONE) {
+		if (spa->spa_ena == 0)
+			spa->spa_ena = fm_ena_generate(0, FM_ENA_FMT1);
+		ena = spa->spa_ena;
+	} else if (zio != NULL && zio->io_logical != NULL) {
+		if (zio->io_logical->io_ena == 0)
+			zio->io_logical->io_ena =
+			    fm_ena_generate(0, FM_ENA_FMT1);
+		ena = zio->io_logical->io_ena;
+	} else {
+		ena = fm_ena_generate(0, FM_ENA_FMT1);
+	}
+
+	/*
+	 * Construct the full class, detector, and other standard FMA fields.
+	 */
+	(void) snprintf(class, sizeof (class), "%s.%s",
+	    ZFS_ERROR_CLASS, subclass);
+
+	fm_fmri_zfs_set(detector, FM_ZFS_SCHEME_VERSION, spa_guid(spa),
+	    vd != NULL ? vd->vdev_guid : 0);
+
+	fm_ereport_set(ereport, FM_EREPORT_VERSION, class, ena, detector, NULL);
+
+	/*
+	 * Construct the per-ereport payload, depending on which parameters are
+	 * passed in.
+	 */
+
+	/*
+	 * Generic payload members common to all ereports.
+	 */
+	fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_POOL,
+	    DATA_TYPE_STRING, spa_name(spa), FM_EREPORT_PAYLOAD_ZFS_POOL_GUID,
+	    DATA_TYPE_UINT64, spa_guid(spa),
+	    FM_EREPORT_PAYLOAD_ZFS_POOL_CONTEXT, DATA_TYPE_INT32,
+	    spa_load_state(spa), NULL);
+
+	if (spa != NULL) {
+		fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_POOL_FAILMODE,
+		    DATA_TYPE_STRING,
+		    spa_get_failmode(spa) == ZIO_FAILURE_MODE_WAIT ?
+		    FM_EREPORT_FAILMODE_WAIT :
+		    spa_get_failmode(spa) == ZIO_FAILURE_MODE_CONTINUE ?
+		    FM_EREPORT_FAILMODE_CONTINUE : FM_EREPORT_FAILMODE_PANIC,
+		    NULL);
+	}
+
+	if (vd != NULL) {
+		vdev_t *pvd = vd->vdev_parent;
+
+		fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID,
+		    DATA_TYPE_UINT64, vd->vdev_guid,
+		    FM_EREPORT_PAYLOAD_ZFS_VDEV_TYPE,
+		    DATA_TYPE_STRING, vd->vdev_ops->vdev_op_type, NULL);
+		if (vd->vdev_path != NULL)
+			fm_payload_set(ereport,
+			    FM_EREPORT_PAYLOAD_ZFS_VDEV_PATH,
+			    DATA_TYPE_STRING, vd->vdev_path, NULL);
+		if (vd->vdev_devid != NULL)
+			fm_payload_set(ereport,
+			    FM_EREPORT_PAYLOAD_ZFS_VDEV_DEVID,
+			    DATA_TYPE_STRING, vd->vdev_devid, NULL);
+		if (vd->vdev_fru != NULL)
+			fm_payload_set(ereport,
+			    FM_EREPORT_PAYLOAD_ZFS_VDEV_FRU,
+			    DATA_TYPE_STRING, vd->vdev_fru, NULL);
+
+		if (pvd != NULL) {
+			fm_payload_set(ereport,
+			    FM_EREPORT_PAYLOAD_ZFS_PARENT_GUID,
+			    DATA_TYPE_UINT64, pvd->vdev_guid,
+			    FM_EREPORT_PAYLOAD_ZFS_PARENT_TYPE,
+			    DATA_TYPE_STRING, pvd->vdev_ops->vdev_op_type,
+			    NULL);
+			if (pvd->vdev_path)
+				fm_payload_set(ereport,
+				    FM_EREPORT_PAYLOAD_ZFS_PARENT_PATH,
+				    DATA_TYPE_STRING, pvd->vdev_path, NULL);
+			if (pvd->vdev_devid)
+				fm_payload_set(ereport,
+				    FM_EREPORT_PAYLOAD_ZFS_PARENT_DEVID,
+				    DATA_TYPE_STRING, pvd->vdev_devid, NULL);
+		}
+	}
+
+	if (zio != NULL) {
+		/*
+		 * Payload common to all I/Os.
+		 */
+		fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_ZIO_ERR,
+		    DATA_TYPE_INT32, zio->io_error, NULL);
+
+		/*
+		 * If the 'size' parameter is non-zero, it indicates this is a
+		 * RAID-Z or other I/O where the physical offset and length are
+		 * provided for us, instead of within the zio_t.
+		 */
+		if (vd != NULL) {
+			if (size)
+				fm_payload_set(ereport,
+				    FM_EREPORT_PAYLOAD_ZFS_ZIO_OFFSET,
+				    DATA_TYPE_UINT64, stateoroffset,
+				    FM_EREPORT_PAYLOAD_ZFS_ZIO_SIZE,
+				    DATA_TYPE_UINT64, size, NULL);
+			else
+				fm_payload_set(ereport,
+				    FM_EREPORT_PAYLOAD_ZFS_ZIO_OFFSET,
+				    DATA_TYPE_UINT64, zio->io_offset,
+				    FM_EREPORT_PAYLOAD_ZFS_ZIO_SIZE,
+				    DATA_TYPE_UINT64, zio->io_size, NULL);
+		}
+
+		/*
+		 * Payload for I/Os with corresponding logical information.
+		 */
+		if (zio->io_logical != NULL)
+			fm_payload_set(ereport,
+			    FM_EREPORT_PAYLOAD_ZFS_ZIO_OBJSET,
+			    DATA_TYPE_UINT64,
+			    zio->io_logical->io_bookmark.zb_objset,
+			    FM_EREPORT_PAYLOAD_ZFS_ZIO_OBJECT,
+			    DATA_TYPE_UINT64,
+			    zio->io_logical->io_bookmark.zb_object,
+			    FM_EREPORT_PAYLOAD_ZFS_ZIO_LEVEL,
+			    DATA_TYPE_INT64,
+			    zio->io_logical->io_bookmark.zb_level,
+			    FM_EREPORT_PAYLOAD_ZFS_ZIO_BLKID,
+			    DATA_TYPE_UINT64,
+			    zio->io_logical->io_bookmark.zb_blkid, NULL);
+	} else if (vd != NULL) {
+		/*
+		 * If we have a vdev but no zio, this is a device fault, and the
+		 * 'stateoroffset' parameter indicates the previous state of the
+		 * vdev.
+		 */
+		fm_payload_set(ereport,
+		    FM_EREPORT_PAYLOAD_ZFS_PREV_STATE,
+		    DATA_TYPE_UINT64, stateoroffset, NULL);
+	}
+
+	mutex_exit(&spa->spa_errlist_lock);
+
+	*ereport_out = ereport;
+	*detector_out = detector;
+}
+
+/* if it's <= 128 bytes, save the corruption directly */
+#define	ZFM_MAX_INLINE		(128 / sizeof (uint64_t))
+
+#define	MAX_RANGES		16
+
+typedef struct zfs_ecksum_info {
+	/* histograms of set and cleared bits by bit number in a 64-bit word */
+	uint16_t zei_histogram_set[sizeof (uint64_t) * NBBY];
+	uint16_t zei_histogram_cleared[sizeof (uint64_t) * NBBY];
+
+	/* inline arrays of bits set and cleared. */
+	uint64_t zei_bits_set[ZFM_MAX_INLINE];
+	uint64_t zei_bits_cleared[ZFM_MAX_INLINE];
+
+	/*
+	 * for each range, the number of bits set and cleared.  The Hamming
+	 * distance between the good and bad buffers is the sum of them all.
+	 */
+	uint32_t zei_range_sets[MAX_RANGES];
+	uint32_t zei_range_clears[MAX_RANGES];
+
+	struct zei_ranges {
+		uint32_t	zr_start;
+		uint32_t	zr_end;
+	} zei_ranges[MAX_RANGES];
+
+	size_t	zei_range_count;
+	uint32_t zei_mingap;
+	uint32_t zei_allowed_mingap;
+
+} zfs_ecksum_info_t;
+
+static void
+update_histogram(uint64_t value_arg, uint16_t *hist, uint32_t *count)
+{
+	size_t i;
+	size_t bits = 0;
+	uint64_t value = BE_64(value_arg);
+
+	/* We store the bits in big-endian (largest-first) order */
+	for (i = 0; i < 64; i++) {
+		if (value & (1ull << i)) {
+			hist[63 - i]++;
+			++bits;
+		}
+	}
+	/* update the count of bits changed */
+	*count += bits;
+}
+
+/*
+ * We've now filled up the range array, and need to increase "mingap" and
+ * shrink the range list accordingly.  zei_mingap is always the smallest
+ * distance between array entries, so we set the new_allowed_gap to be
+ * one greater than that.  We then go through the list, joining together
+ * any ranges which are closer than the new_allowed_gap.
+ *
+ * By construction, there will be at least one.  We also update zei_mingap
+ * to the new smallest gap, to prepare for our next invocation.
+ */
+static void
+shrink_ranges(zfs_ecksum_info_t *eip)
+{
+	uint32_t mingap = UINT32_MAX;
+	uint32_t new_allowed_gap = eip->zei_mingap + 1;
+
+	size_t idx, output;
+	size_t max = eip->zei_range_count;
+
+	struct zei_ranges *r = eip->zei_ranges;
+
+	ASSERT3U(eip->zei_range_count, >, 0);
+	ASSERT3U(eip->zei_range_count, <=, MAX_RANGES);
+
+	output = idx = 0;
+	while (idx < max - 1) {
+		uint32_t start = r[idx].zr_start;
+		uint32_t end = r[idx].zr_end;
+
+		while (idx < max - 1) {
+			idx++;
+
+			uint32_t nstart = r[idx].zr_start;
+			uint32_t nend = r[idx].zr_end;
+
+			uint32_t gap = nstart - end;
+			if (gap < new_allowed_gap) {
+				end = nend;
+				continue;
+			}
+			if (gap < mingap)
+				mingap = gap;
+			break;
+		}
+		r[output].zr_start = start;
+		r[output].zr_end = end;
+		output++;
+	}
+	ASSERT3U(output, <, eip->zei_range_count);
+	eip->zei_range_count = output;
+	eip->zei_mingap = mingap;
+	eip->zei_allowed_mingap = new_allowed_gap;
+}
+
+static void
+add_range(zfs_ecksum_info_t *eip, int start, int end)
+{
+	struct zei_ranges *r = eip->zei_ranges;
+	size_t count = eip->zei_range_count;
+
+	if (count >= MAX_RANGES) {
+		shrink_ranges(eip);
+		count = eip->zei_range_count;
+	}
+	if (count == 0) {
+		eip->zei_mingap = UINT32_MAX;
+		eip->zei_allowed_mingap = 1;
+	} else {
+		int gap = start - r[count - 1].zr_end;
+
+		if (gap < eip->zei_allowed_mingap) {
+			r[count - 1].zr_end = end;
+			return;
+		}
+		if (gap < eip->zei_mingap)
+			eip->zei_mingap = gap;
+	}
+	r[count].zr_start = start;
+	r[count].zr_end = end;
+	eip->zei_range_count++;
+}
+
+static size_t
+range_total_size(zfs_ecksum_info_t *eip)
+{
+	struct zei_ranges *r = eip->zei_ranges;
+	size_t count = eip->zei_range_count;
+	size_t result = 0;
+	size_t idx;
+
+	for (idx = 0; idx < count; idx++)
+		result += (r[idx].zr_end - r[idx].zr_start);
+
+	return (result);
+}
+
+static zfs_ecksum_info_t *
+annotate_ecksum(nvlist_t *ereport, zio_bad_cksum_t *info,
+    const uint8_t *goodbuf, const uint8_t *badbuf, size_t size,
+    boolean_t drop_if_identical)
+{
+	const uint64_t *good = (const uint64_t *)goodbuf;
+	const uint64_t *bad = (const uint64_t *)badbuf;
+
+	uint64_t allset = 0;
+	uint64_t allcleared = 0;
+
+	size_t nui64s = size / sizeof (uint64_t);
+
+	size_t inline_size;
+	int no_inline = 0;
+	size_t idx;
+	size_t range;
+
+	size_t offset = 0;
+	ssize_t start = -1;
+
+	zfs_ecksum_info_t *eip = kmem_zalloc(sizeof (*eip), KM_SLEEP);
+
+	/* don't do any annotation for injected checksum errors */
+	if (info != NULL && info->zbc_injected)
+		return (eip);
+
+	if (info != NULL && info->zbc_has_cksum) {
+		fm_payload_set(ereport,
+		    FM_EREPORT_PAYLOAD_ZFS_CKSUM_EXPECTED,
+		    DATA_TYPE_UINT64_ARRAY,
+		    sizeof (info->zbc_expected) / sizeof (uint64_t),
+		    (uint64_t *)&info->zbc_expected,
+		    FM_EREPORT_PAYLOAD_ZFS_CKSUM_ACTUAL,
+		    DATA_TYPE_UINT64_ARRAY,
+		    sizeof (info->zbc_actual) / sizeof (uint64_t),
+		    (uint64_t *)&info->zbc_actual,
+		    FM_EREPORT_PAYLOAD_ZFS_CKSUM_ALGO,
+		    DATA_TYPE_STRING,
+		    info->zbc_checksum_name,
+		    NULL);
+
+		if (info->zbc_byteswapped) {
+			fm_payload_set(ereport,
+			    FM_EREPORT_PAYLOAD_ZFS_CKSUM_BYTESWAP,
+			    DATA_TYPE_BOOLEAN, 1,
+			    NULL);
+		}
+	}
+
+	if (badbuf == NULL || goodbuf == NULL)
+		return (eip);
+
+	ASSERT3U(nui64s, <=, UINT16_MAX);
+	ASSERT3U(size, ==, nui64s * sizeof (uint64_t));
+	ASSERT3U(size, <=, SPA_MAXBLOCKSIZE);
+	ASSERT3U(size, <=, UINT32_MAX);
+
+	/* build up the range list by comparing the two buffers. */
+	for (idx = 0; idx < nui64s; idx++) {
+		if (good[idx] == bad[idx]) {
+			if (start == -1)
+				continue;
+
+			add_range(eip, start, idx);
+			start = -1;
+		} else {
+			if (start != -1)
+				continue;
+
+			start = idx;
+		}
+	}
+	if (start != -1)
+		add_range(eip, start, idx);
+
+	/* See if it will fit in our inline buffers */
+	inline_size = range_total_size(eip);
+	if (inline_size > ZFM_MAX_INLINE)
+		no_inline = 1;
+
+	/*
+	 * If there is no change and we want to drop if the buffers are
+	 * identical, do so.
+	 */
+	if (inline_size == 0 && drop_if_identical) {
+		kmem_free(eip, sizeof (*eip));
+		return (NULL);
+	}
+
+	/*
+	 * Now walk through the ranges, filling in the details of the
+	 * differences.  Also convert our uint64_t-array offsets to byte
+	 * offsets.
+	 */
+	for (range = 0; range < eip->zei_range_count; range++) {
+		size_t start = eip->zei_ranges[range].zr_start;
+		size_t end = eip->zei_ranges[range].zr_end;
+
+		for (idx = start; idx < end; idx++) {
+			uint64_t set, cleared;
+
+			// bits set in bad, but not in good
+			set = ((~good[idx]) & bad[idx]);
+			// bits set in good, but not in bad
+			cleared = (good[idx] & (~bad[idx]));
+
+			allset |= set;
+			allcleared |= cleared;
+
+			if (!no_inline) {
+				ASSERT3U(offset, <, inline_size);
+				eip->zei_bits_set[offset] = set;
+				eip->zei_bits_cleared[offset] = cleared;
+				offset++;
+			}
+
+			update_histogram(set, eip->zei_histogram_set,
+			    &eip->zei_range_sets[range]);
+			update_histogram(cleared, eip->zei_histogram_cleared,
+			    &eip->zei_range_clears[range]);
+		}
+
+		/* convert to byte offsets */
+		eip->zei_ranges[range].zr_start	*= sizeof (uint64_t);
+		eip->zei_ranges[range].zr_end	*= sizeof (uint64_t);
+	}
+	eip->zei_allowed_mingap	*= sizeof (uint64_t);
+	inline_size		*= sizeof (uint64_t);
+
+	/* fill in ereport */
+	fm_payload_set(ereport,
+	    FM_EREPORT_PAYLOAD_ZFS_BAD_OFFSET_RANGES,
+	    DATA_TYPE_UINT32_ARRAY, 2 * eip->zei_range_count,
+	    (uint32_t *)eip->zei_ranges,
+	    FM_EREPORT_PAYLOAD_ZFS_BAD_RANGE_MIN_GAP,
+	    DATA_TYPE_UINT32, eip->zei_allowed_mingap,
+	    FM_EREPORT_PAYLOAD_ZFS_BAD_RANGE_SETS,
+	    DATA_TYPE_UINT32_ARRAY, eip->zei_range_count, eip->zei_range_sets,
+	    FM_EREPORT_PAYLOAD_ZFS_BAD_RANGE_CLEARS,
+	    DATA_TYPE_UINT32_ARRAY, eip->zei_range_count, eip->zei_range_clears,
+	    NULL);
+
+	if (!no_inline) {
+		fm_payload_set(ereport,
+		    FM_EREPORT_PAYLOAD_ZFS_BAD_SET_BITS,
+		    DATA_TYPE_UINT8_ARRAY,
+		    inline_size, (uint8_t *)eip->zei_bits_set,
+		    FM_EREPORT_PAYLOAD_ZFS_BAD_CLEARED_BITS,
+		    DATA_TYPE_UINT8_ARRAY,
+		    inline_size, (uint8_t *)eip->zei_bits_cleared,
+		    NULL);
+	} else {
+		fm_payload_set(ereport,
+		    FM_EREPORT_PAYLOAD_ZFS_BAD_SET_HISTOGRAM,
+		    DATA_TYPE_UINT16_ARRAY,
+		    NBBY * sizeof (uint64_t), eip->zei_histogram_set,
+		    FM_EREPORT_PAYLOAD_ZFS_BAD_CLEARED_HISTOGRAM,
+		    DATA_TYPE_UINT16_ARRAY,
+		    NBBY * sizeof (uint64_t), eip->zei_histogram_cleared,
+		    NULL);
+	}
+	return (eip);
+}
+#endif
+
+void
+zfs_ereport_post(const char *subclass, spa_t *spa, vdev_t *vd, zio_t *zio,
+    uint64_t stateoroffset, uint64_t size)
+{
+#ifdef _KERNEL
+	nvlist_t *ereport = NULL;
+	nvlist_t *detector = NULL;
+
+	zfs_ereport_start(&ereport, &detector,
+	    subclass, spa, vd, zio, stateoroffset, size);
+
+	if (ereport == NULL)
+		return;
+
+	fm_ereport_post(ereport, EVCH_SLEEP);
+
+	fm_nvlist_destroy(ereport, FM_NVA_FREE);
+	fm_nvlist_destroy(detector, FM_NVA_FREE);
+#endif
+}
+
+void
+zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd,
+    struct zio *zio, uint64_t offset, uint64_t length, void *arg,
+    zio_bad_cksum_t *info)
+{
+	zio_cksum_report_t *report = kmem_zalloc(sizeof (*report), KM_SLEEP);
+
+	if (zio->io_vsd != NULL)
+		zio->io_vsd_ops->vsd_cksum_report(zio, report, arg);
+	else
+		zio_vsd_default_cksum_report(zio, report, arg);
+
+	/* copy the checksum failure information if it was provided */
+	if (info != NULL) {
+		report->zcr_ckinfo = kmem_zalloc(sizeof (*info), KM_SLEEP);
+		bcopy(info, report->zcr_ckinfo, sizeof (*info));
+	}
+
+	report->zcr_align = 1ULL << vd->vdev_top->vdev_ashift;
+	report->zcr_length = length;
+
+#ifdef _KERNEL
+	zfs_ereport_start(&report->zcr_ereport, &report->zcr_detector,
+	    FM_EREPORT_ZFS_CHECKSUM, spa, vd, zio, offset, length);
+
+	if (report->zcr_ereport == NULL) {
+		report->zcr_free(report->zcr_cbdata, report->zcr_cbinfo);
+		kmem_free(report, sizeof (*report));
+		return;
+	}
+#endif
+
+	mutex_enter(&spa->spa_errlist_lock);
+	report->zcr_next = zio->io_logical->io_cksum_report;
+	zio->io_logical->io_cksum_report = report;
+	mutex_exit(&spa->spa_errlist_lock);
+}
+
+void
+zfs_ereport_finish_checksum(zio_cksum_report_t *report,
+    const void *good_data, const void *bad_data, boolean_t drop_if_identical)
+{
+#ifdef _KERNEL
+	zfs_ecksum_info_t *info = NULL;
+	info = annotate_ecksum(report->zcr_ereport, report->zcr_ckinfo,
+	    good_data, bad_data, report->zcr_length, drop_if_identical);
+
+	if (info != NULL)
+		fm_ereport_post(report->zcr_ereport, EVCH_SLEEP);
+
+	fm_nvlist_destroy(report->zcr_ereport, FM_NVA_FREE);
+	fm_nvlist_destroy(report->zcr_detector, FM_NVA_FREE);
+	report->zcr_ereport = report->zcr_detector = NULL;
+
+	if (info != NULL)
+		kmem_free(info, sizeof (*info));
+#endif
+}
+
+void
+zfs_ereport_free_checksum(zio_cksum_report_t *rpt)
+{
+#ifdef _KERNEL
+	if (rpt->zcr_ereport != NULL) {
+		fm_nvlist_destroy(rpt->zcr_ereport,
+		    FM_NVA_FREE);
+		fm_nvlist_destroy(rpt->zcr_detector,
+		    FM_NVA_FREE);
+	}
+#endif
+	rpt->zcr_free(rpt->zcr_cbdata, rpt->zcr_cbinfo);
+
+	if (rpt->zcr_ckinfo != NULL)
+		kmem_free(rpt->zcr_ckinfo, sizeof (*rpt->zcr_ckinfo));
+
+	kmem_free(rpt, sizeof (*rpt));
+}
+
+void
+zfs_ereport_send_interim_checksum(zio_cksum_report_t *report)
+{
+#ifdef _KERNEL
+	fm_ereport_post(report->zcr_ereport, EVCH_SLEEP);
+#endif
+}
+
+void
+zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
+    struct zio *zio, uint64_t offset, uint64_t length,
+    const void *good_data, const void *bad_data, zio_bad_cksum_t *zbc)
+{
+#ifdef _KERNEL
+	nvlist_t *ereport = NULL;
+	nvlist_t *detector = NULL;
+	zfs_ecksum_info_t *info;
+
+	zfs_ereport_start(&ereport, &detector,
+	    FM_EREPORT_ZFS_CHECKSUM, spa, vd, zio, offset, length);
+
+	if (ereport == NULL)
+		return;
+
+	info = annotate_ecksum(ereport, zbc, good_data, bad_data, length,
+	    B_FALSE);
+
+	if (info != NULL)
+		fm_ereport_post(ereport, EVCH_SLEEP);
+
+	fm_nvlist_destroy(ereport, FM_NVA_FREE);
+	fm_nvlist_destroy(detector, FM_NVA_FREE);
+
+	if (info != NULL)
+		kmem_free(info, sizeof (*info));
+#endif
+}
+
+static void
+zfs_post_common(spa_t *spa, vdev_t *vd, const char *name)
+{
+#ifdef _KERNEL
+	nvlist_t *resource;
+	char class[64];
+
+	if (spa_load_state(spa) == SPA_LOAD_TRYIMPORT)
+		return;
+
+	if ((resource = fm_nvlist_create(NULL)) == NULL)
+		return;
+
+	(void) snprintf(class, sizeof (class), "%s.%s.%s", FM_RSRC_RESOURCE,
+	    ZFS_ERROR_CLASS, name);
+	VERIFY(nvlist_add_uint8(resource, FM_VERSION, FM_RSRC_VERSION) == 0);
+	VERIFY(nvlist_add_string(resource, FM_CLASS, class) == 0);
+	VERIFY(nvlist_add_uint64(resource,
+	    FM_EREPORT_PAYLOAD_ZFS_POOL_GUID, spa_guid(spa)) == 0);
+	if (vd)
+		VERIFY(nvlist_add_uint64(resource,
+		    FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID, vd->vdev_guid) == 0);
+
+	fm_ereport_post(resource, EVCH_SLEEP);
+
+	fm_nvlist_destroy(resource, FM_NVA_FREE);
+#endif
+}
+
+/*
+ * The 'resource.fs.zfs.removed' event is an internal signal that the given vdev
+ * has been removed from the system.  This will cause the DE to ignore any
+ * recent I/O errors, inferring that they are due to the asynchronous device
+ * removal.
+ */
+void
+zfs_post_remove(spa_t *spa, vdev_t *vd)
+{
+	zfs_post_common(spa, vd, FM_RESOURCE_REMOVED);
+}
+
+/*
+ * The 'resource.fs.zfs.autoreplace' event is an internal signal that the pool
+ * has the 'autoreplace' property set, and therefore any broken vdevs will be
+ * handled by higher level logic, and no vdev fault should be generated.
+ */
+void
+zfs_post_autoreplace(spa_t *spa, vdev_t *vd)
+{
+	zfs_post_common(spa, vd, FM_RESOURCE_AUTOREPLACE);
+}
+
+/*
+ * The 'resource.fs.zfs.statechange' event is an internal signal that the
+ * given vdev has transitioned its state to DEGRADED or HEALTHY.  This will
+ * cause the retire agent to repair any outstanding fault management cases
+ * open because the device was not found (fault.fs.zfs.device).
+ */
+void
+zfs_post_state_change(spa_t *spa, vdev_t *vd)
+{
+	zfs_post_common(spa, vd, FM_RESOURCE_STATECHANGE);
+}
diff --git a/uts/common/fs/zfs/zfs_fuid.c b/uts/common/fs/zfs/zfs_fuid.c
new file mode 100644
index 000000000000..a853f4d73561
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_fuid.c
@@ -0,0 +1,756 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/dmu.h>
+#include <sys/avl.h>
+#include <sys/zap.h>
+#include <sys/refcount.h>
+#include <sys/nvpair.h>
+#ifdef _KERNEL
+#include <sys/kidmap.h>
+#include <sys/sid.h>
+#include <sys/zfs_vfsops.h>
+#include <sys/zfs_znode.h>
+#endif
+#include <sys/zfs_fuid.h>
+
+/*
+ * FUID Domain table(s).
+ *
+ * The FUID table is stored as a packed nvlist of an array
+ * of nvlists which contain an index, domain string and offset
+ *
+ * During file system initialization the nvlist(s) are read and
+ * two AVL trees are created.  One tree is keyed by the index number
+ * and the other by the domain string.  Nodes are never removed from
+ * trees, but new entries may be added.  If a new entry is added then
+ * the zfsvfs->z_fuid_dirty flag is set to true and the caller will then
+ * be responsible for calling zfs_fuid_sync() to sync the changes to disk.
+ *
+ */
+
+#define	FUID_IDX	"fuid_idx"
+#define	FUID_DOMAIN	"fuid_domain"
+#define	FUID_OFFSET	"fuid_offset"
+#define	FUID_NVP_ARRAY	"fuid_nvlist"
+
+typedef struct fuid_domain {
+	avl_node_t	f_domnode;
+	avl_node_t	f_idxnode;
+	ksiddomain_t	*f_ksid;
+	uint64_t	f_idx;
+} fuid_domain_t;
+
+static char *nulldomain = "";
+
+/*
+ * Compare two indexes.
+ */
+static int
+idx_compare(const void *arg1, const void *arg2)
+{
+	const fuid_domain_t *node1 = arg1;
+	const fuid_domain_t *node2 = arg2;
+
+	if (node1->f_idx < node2->f_idx)
+		return (-1);
+	else if (node1->f_idx > node2->f_idx)
+		return (1);
+	return (0);
+}
+
+/*
+ * Compare two domain strings.
+ */
+static int
+domain_compare(const void *arg1, const void *arg2)
+{
+	const fuid_domain_t *node1 = arg1;
+	const fuid_domain_t *node2 = arg2;
+	int val;
+
+	val = strcmp(node1->f_ksid->kd_name, node2->f_ksid->kd_name);
+	if (val == 0)
+		return (0);
+	return (val > 0 ? 1 : -1);
+}
+
+void
+zfs_fuid_avl_tree_create(avl_tree_t *idx_tree, avl_tree_t *domain_tree)
+{
+	avl_create(idx_tree, idx_compare,
+	    sizeof (fuid_domain_t), offsetof(fuid_domain_t, f_idxnode));
+	avl_create(domain_tree, domain_compare,
+	    sizeof (fuid_domain_t), offsetof(fuid_domain_t, f_domnode));
+}
+
+/*
+ * load initial fuid domain and idx trees.  This function is used by
+ * both the kernel and zdb.
+ */
+uint64_t
+zfs_fuid_table_load(objset_t *os, uint64_t fuid_obj, avl_tree_t *idx_tree,
+    avl_tree_t *domain_tree)
+{
+	dmu_buf_t *db;
+	uint64_t fuid_size;
+
+	ASSERT(fuid_obj != 0);
+	VERIFY(0 == dmu_bonus_hold(os, fuid_obj,
+	    FTAG, &db));
+	fuid_size = *(uint64_t *)db->db_data;
+	dmu_buf_rele(db, FTAG);
+
+	if (fuid_size)  {
+		nvlist_t **fuidnvp;
+		nvlist_t *nvp = NULL;
+		uint_t count;
+		char *packed;
+		int i;
+
+		packed = kmem_alloc(fuid_size, KM_SLEEP);
+		VERIFY(dmu_read(os, fuid_obj, 0,
+		    fuid_size, packed, DMU_READ_PREFETCH) == 0);
+		VERIFY(nvlist_unpack(packed, fuid_size,
+		    &nvp, 0) == 0);
+		VERIFY(nvlist_lookup_nvlist_array(nvp, FUID_NVP_ARRAY,
+		    &fuidnvp, &count) == 0);
+
+		for (i = 0; i != count; i++) {
+			fuid_domain_t *domnode;
+			char *domain;
+			uint64_t idx;
+
+			VERIFY(nvlist_lookup_string(fuidnvp[i], FUID_DOMAIN,
+			    &domain) == 0);
+			VERIFY(nvlist_lookup_uint64(fuidnvp[i], FUID_IDX,
+			    &idx) == 0);
+
+			domnode = kmem_alloc(sizeof (fuid_domain_t), KM_SLEEP);
+
+			domnode->f_idx = idx;
+			domnode->f_ksid = ksid_lookupdomain(domain);
+			avl_add(idx_tree, domnode);
+			avl_add(domain_tree, domnode);
+		}
+		nvlist_free(nvp);
+		kmem_free(packed, fuid_size);
+	}
+	return (fuid_size);
+}
+
+void
+zfs_fuid_table_destroy(avl_tree_t *idx_tree, avl_tree_t *domain_tree)
+{
+	fuid_domain_t *domnode;
+	void *cookie;
+
+	cookie = NULL;
+	while (domnode = avl_destroy_nodes(domain_tree, &cookie))
+		ksiddomain_rele(domnode->f_ksid);
+
+	avl_destroy(domain_tree);
+	cookie = NULL;
+	while (domnode = avl_destroy_nodes(idx_tree, &cookie))
+		kmem_free(domnode, sizeof (fuid_domain_t));
+	avl_destroy(idx_tree);
+}
+
+char *
+zfs_fuid_idx_domain(avl_tree_t *idx_tree, uint32_t idx)
+{
+	fuid_domain_t searchnode, *findnode;
+	avl_index_t loc;
+
+	searchnode.f_idx = idx;
+
+	findnode = avl_find(idx_tree, &searchnode, &loc);
+
+	return (findnode ? findnode->f_ksid->kd_name : nulldomain);
+}
+
+#ifdef _KERNEL
+/*
+ * Load the fuid table(s) into memory.
+ */
+static void
+zfs_fuid_init(zfsvfs_t *zfsvfs)
+{
+	rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER);
+
+	if (zfsvfs->z_fuid_loaded) {
+		rw_exit(&zfsvfs->z_fuid_lock);
+		return;
+	}
+
+	zfs_fuid_avl_tree_create(&zfsvfs->z_fuid_idx, &zfsvfs->z_fuid_domain);
+
+	(void) zap_lookup(zfsvfs->z_os, MASTER_NODE_OBJ,
+	    ZFS_FUID_TABLES, 8, 1, &zfsvfs->z_fuid_obj);
+	if (zfsvfs->z_fuid_obj != 0) {
+		zfsvfs->z_fuid_size = zfs_fuid_table_load(zfsvfs->z_os,
+		    zfsvfs->z_fuid_obj, &zfsvfs->z_fuid_idx,
+		    &zfsvfs->z_fuid_domain);
+	}
+
+	zfsvfs->z_fuid_loaded = B_TRUE;
+	rw_exit(&zfsvfs->z_fuid_lock);
+}
+
+/*
+ * sync out AVL trees to persistent storage.
+ */
+void
+zfs_fuid_sync(zfsvfs_t *zfsvfs, dmu_tx_t *tx)
+{
+	nvlist_t *nvp;
+	nvlist_t **fuids;
+	size_t nvsize = 0;
+	char *packed;
+	dmu_buf_t *db;
+	fuid_domain_t *domnode;
+	int numnodes;
+	int i;
+
+	if (!zfsvfs->z_fuid_dirty) {
+		return;
+	}
+
+	rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER);
+
+	/*
+	 * First see if table needs to be created?
+	 */
+	if (zfsvfs->z_fuid_obj == 0) {
+		zfsvfs->z_fuid_obj = dmu_object_alloc(zfsvfs->z_os,
+		    DMU_OT_FUID, 1 << 14, DMU_OT_FUID_SIZE,
+		    sizeof (uint64_t), tx);
+		VERIFY(zap_add(zfsvfs->z_os, MASTER_NODE_OBJ,
+		    ZFS_FUID_TABLES, sizeof (uint64_t), 1,
+		    &zfsvfs->z_fuid_obj, tx) == 0);
+	}
+
+	VERIFY(nvlist_alloc(&nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	numnodes = avl_numnodes(&zfsvfs->z_fuid_idx);
+	fuids = kmem_alloc(numnodes * sizeof (void *), KM_SLEEP);
+	for (i = 0, domnode = avl_first(&zfsvfs->z_fuid_domain); domnode; i++,
+	    domnode = AVL_NEXT(&zfsvfs->z_fuid_domain, domnode)) {
+		VERIFY(nvlist_alloc(&fuids[i], NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		VERIFY(nvlist_add_uint64(fuids[i], FUID_IDX,
+		    domnode->f_idx) == 0);
+		VERIFY(nvlist_add_uint64(fuids[i], FUID_OFFSET, 0) == 0);
+		VERIFY(nvlist_add_string(fuids[i], FUID_DOMAIN,
+		    domnode->f_ksid->kd_name) == 0);
+	}
+	VERIFY(nvlist_add_nvlist_array(nvp, FUID_NVP_ARRAY,
+	    fuids, numnodes) == 0);
+	for (i = 0; i != numnodes; i++)
+		nvlist_free(fuids[i]);
+	kmem_free(fuids, numnodes * sizeof (void *));
+	VERIFY(nvlist_size(nvp, &nvsize, NV_ENCODE_XDR) == 0);
+	packed = kmem_alloc(nvsize, KM_SLEEP);
+	VERIFY(nvlist_pack(nvp, &packed, &nvsize,
+	    NV_ENCODE_XDR, KM_SLEEP) == 0);
+	nvlist_free(nvp);
+	zfsvfs->z_fuid_size = nvsize;
+	dmu_write(zfsvfs->z_os, zfsvfs->z_fuid_obj, 0,
+	    zfsvfs->z_fuid_size, packed, tx);
+	kmem_free(packed, zfsvfs->z_fuid_size);
+	VERIFY(0 == dmu_bonus_hold(zfsvfs->z_os, zfsvfs->z_fuid_obj,
+	    FTAG, &db));
+	dmu_buf_will_dirty(db, tx);
+	*(uint64_t *)db->db_data = zfsvfs->z_fuid_size;
+	dmu_buf_rele(db, FTAG);
+
+	zfsvfs->z_fuid_dirty = B_FALSE;
+	rw_exit(&zfsvfs->z_fuid_lock);
+}
+
+/*
+ * Query domain table for a given domain.
+ *
+ * If domain isn't found and addok is set, it is added to AVL trees and
+ * the zfsvfs->z_fuid_dirty flag will be set to TRUE.  It will then be
+ * necessary for the caller or another thread to detect the dirty table
+ * and sync out the changes.
+ */
+int
+zfs_fuid_find_by_domain(zfsvfs_t *zfsvfs, const char *domain,
+    char **retdomain, boolean_t addok)
+{
+	fuid_domain_t searchnode, *findnode;
+	avl_index_t loc;
+	krw_t rw = RW_READER;
+
+	/*
+	 * If the dummy "nobody" domain then return an index of 0
+	 * to cause the created FUID to be a standard POSIX id
+	 * for the user nobody.
+	 */
+	if (domain[0] == '\0') {
+		if (retdomain)
+			*retdomain = nulldomain;
+		return (0);
+	}
+
+	searchnode.f_ksid = ksid_lookupdomain(domain);
+	if (retdomain)
+		*retdomain = searchnode.f_ksid->kd_name;
+	if (!zfsvfs->z_fuid_loaded)
+		zfs_fuid_init(zfsvfs);
+
+retry:
+	rw_enter(&zfsvfs->z_fuid_lock, rw);
+	findnode = avl_find(&zfsvfs->z_fuid_domain, &searchnode, &loc);
+
+	if (findnode) {
+		rw_exit(&zfsvfs->z_fuid_lock);
+		ksiddomain_rele(searchnode.f_ksid);
+		return (findnode->f_idx);
+	} else if (addok) {
+		fuid_domain_t *domnode;
+		uint64_t retidx;
+
+		if (rw == RW_READER && !rw_tryupgrade(&zfsvfs->z_fuid_lock)) {
+			rw_exit(&zfsvfs->z_fuid_lock);
+			rw = RW_WRITER;
+			goto retry;
+		}
+
+		domnode = kmem_alloc(sizeof (fuid_domain_t), KM_SLEEP);
+		domnode->f_ksid = searchnode.f_ksid;
+
+		retidx = domnode->f_idx = avl_numnodes(&zfsvfs->z_fuid_idx) + 1;
+
+		avl_add(&zfsvfs->z_fuid_domain, domnode);
+		avl_add(&zfsvfs->z_fuid_idx, domnode);
+		zfsvfs->z_fuid_dirty = B_TRUE;
+		rw_exit(&zfsvfs->z_fuid_lock);
+		return (retidx);
+	} else {
+		rw_exit(&zfsvfs->z_fuid_lock);
+		return (-1);
+	}
+}
+
+/*
+ * Query domain table by index, returning domain string
+ *
+ * Returns a pointer from an avl node of the domain string.
+ *
+ */
+const char *
+zfs_fuid_find_by_idx(zfsvfs_t *zfsvfs, uint32_t idx)
+{
+	char *domain;
+
+	if (idx == 0 || !zfsvfs->z_use_fuids)
+		return (NULL);
+
+	if (!zfsvfs->z_fuid_loaded)
+		zfs_fuid_init(zfsvfs);
+
+	rw_enter(&zfsvfs->z_fuid_lock, RW_READER);
+
+	if (zfsvfs->z_fuid_obj || zfsvfs->z_fuid_dirty)
+		domain = zfs_fuid_idx_domain(&zfsvfs->z_fuid_idx, idx);
+	else
+		domain = nulldomain;
+	rw_exit(&zfsvfs->z_fuid_lock);
+
+	ASSERT(domain);
+	return (domain);
+}
+
+void
+zfs_fuid_map_ids(znode_t *zp, cred_t *cr, uid_t *uidp, uid_t *gidp)
+{
+	*uidp = zfs_fuid_map_id(zp->z_zfsvfs, zp->z_uid, cr, ZFS_OWNER);
+	*gidp = zfs_fuid_map_id(zp->z_zfsvfs, zp->z_gid, cr, ZFS_GROUP);
+}
+
+uid_t
+zfs_fuid_map_id(zfsvfs_t *zfsvfs, uint64_t fuid,
+    cred_t *cr, zfs_fuid_type_t type)
+{
+	uint32_t index = FUID_INDEX(fuid);
+	const char *domain;
+	uid_t id;
+
+	if (index == 0)
+		return (fuid);
+
+	domain = zfs_fuid_find_by_idx(zfsvfs, index);
+	ASSERT(domain != NULL);
+
+	if (type == ZFS_OWNER || type == ZFS_ACE_USER) {
+		(void) kidmap_getuidbysid(crgetzone(cr), domain,
+		    FUID_RID(fuid), &id);
+	} else {
+		(void) kidmap_getgidbysid(crgetzone(cr), domain,
+		    FUID_RID(fuid), &id);
+	}
+	return (id);
+}
+
+/*
+ * Add a FUID node to the list of fuid's being created for this
+ * ACL
+ *
+ * If ACL has multiple domains, then keep only one copy of each unique
+ * domain.
+ */
+void
+zfs_fuid_node_add(zfs_fuid_info_t **fuidpp, const char *domain, uint32_t rid,
+    uint64_t idx, uint64_t id, zfs_fuid_type_t type)
+{
+	zfs_fuid_t *fuid;
+	zfs_fuid_domain_t *fuid_domain;
+	zfs_fuid_info_t *fuidp;
+	uint64_t fuididx;
+	boolean_t found = B_FALSE;
+
+	if (*fuidpp == NULL)
+		*fuidpp = zfs_fuid_info_alloc();
+
+	fuidp = *fuidpp;
+	/*
+	 * First find fuid domain index in linked list
+	 *
+	 * If one isn't found then create an entry.
+	 */
+
+	for (fuididx = 1, fuid_domain = list_head(&fuidp->z_domains);
+	    fuid_domain; fuid_domain = list_next(&fuidp->z_domains,
+	    fuid_domain), fuididx++) {
+		if (idx == fuid_domain->z_domidx) {
+			found = B_TRUE;
+			break;
+		}
+	}
+
+	if (!found) {
+		fuid_domain = kmem_alloc(sizeof (zfs_fuid_domain_t), KM_SLEEP);
+		fuid_domain->z_domain = domain;
+		fuid_domain->z_domidx = idx;
+		list_insert_tail(&fuidp->z_domains, fuid_domain);
+		fuidp->z_domain_str_sz += strlen(domain) + 1;
+		fuidp->z_domain_cnt++;
+	}
+
+	if (type == ZFS_ACE_USER || type == ZFS_ACE_GROUP) {
+
+		/*
+		 * Now allocate fuid entry and add it on the end of the list
+		 */
+
+		fuid = kmem_alloc(sizeof (zfs_fuid_t), KM_SLEEP);
+		fuid->z_id = id;
+		fuid->z_domidx = idx;
+		fuid->z_logfuid = FUID_ENCODE(fuididx, rid);
+
+		list_insert_tail(&fuidp->z_fuids, fuid);
+		fuidp->z_fuid_cnt++;
+	} else {
+		if (type == ZFS_OWNER)
+			fuidp->z_fuid_owner = FUID_ENCODE(fuididx, rid);
+		else
+			fuidp->z_fuid_group = FUID_ENCODE(fuididx, rid);
+	}
+}
+
+/*
+ * Create a file system FUID, based on information in the users cred
+ *
+ * If cred contains KSID_OWNER then it should be used to determine
+ * the uid otherwise cred's uid will be used. By default cred's gid
+ * is used unless it's an ephemeral ID in which case KSID_GROUP will
+ * be used if it exists.
+ */
+uint64_t
+zfs_fuid_create_cred(zfsvfs_t *zfsvfs, zfs_fuid_type_t type,
+    cred_t *cr, zfs_fuid_info_t **fuidp)
+{
+	uint64_t	idx;
+	ksid_t		*ksid;
+	uint32_t	rid;
+	char 		*kdomain;
+	const char	*domain;
+	uid_t		id;
+
+	VERIFY(type == ZFS_OWNER || type == ZFS_GROUP);
+
+	ksid = crgetsid(cr, (type == ZFS_OWNER) ? KSID_OWNER : KSID_GROUP);
+
+	if (!zfsvfs->z_use_fuids || (ksid == NULL)) {
+		id = (type == ZFS_OWNER) ? crgetuid(cr) : crgetgid(cr);
+
+		if (IS_EPHEMERAL(id))
+			return ((type == ZFS_OWNER) ? UID_NOBODY : GID_NOBODY);
+
+		return ((uint64_t)id);
+	}
+
+	/*
+	 * ksid is present and FUID is supported
+	 */
+	id = (type == ZFS_OWNER) ? ksid_getid(ksid) : crgetgid(cr);
+
+	if (!IS_EPHEMERAL(id))
+		return ((uint64_t)id);
+
+	if (type == ZFS_GROUP)
+		id = ksid_getid(ksid);
+
+	rid = ksid_getrid(ksid);
+	domain = ksid_getdomain(ksid);
+
+	idx = zfs_fuid_find_by_domain(zfsvfs, domain, &kdomain, B_TRUE);
+
+	zfs_fuid_node_add(fuidp, kdomain, rid, idx, id, type);
+
+	return (FUID_ENCODE(idx, rid));
+}
+
+/*
+ * Create a file system FUID for an ACL ace
+ * or a chown/chgrp of the file.
+ * This is similar to zfs_fuid_create_cred, except that
+ * we can't find the domain + rid information in the
+ * cred.  Instead we have to query Winchester for the
+ * domain and rid.
+ *
+ * During replay operations the domain+rid information is
+ * found in the zfs_fuid_info_t that the replay code has
+ * attached to the zfsvfs of the file system.
+ */
+uint64_t
+zfs_fuid_create(zfsvfs_t *zfsvfs, uint64_t id, cred_t *cr,
+    zfs_fuid_type_t type, zfs_fuid_info_t **fuidpp)
+{
+	const char *domain;
+	char *kdomain;
+	uint32_t fuid_idx = FUID_INDEX(id);
+	uint32_t rid;
+	idmap_stat status;
+	uint64_t idx;
+	zfs_fuid_t *zfuid = NULL;
+	zfs_fuid_info_t *fuidp;
+
+	/*
+	 * If POSIX ID, or entry is already a FUID then
+	 * just return the id
+	 *
+	 * We may also be handed an already FUID'ized id via
+	 * chmod.
+	 */
+
+	if (!zfsvfs->z_use_fuids || !IS_EPHEMERAL(id) || fuid_idx != 0)
+		return (id);
+
+	if (zfsvfs->z_replay) {
+		fuidp = zfsvfs->z_fuid_replay;
+
+		/*
+		 * If we are passed an ephemeral id, but no
+		 * fuid_info was logged then return NOBODY.
+		 * This is most likely a result of idmap service
+		 * not being available.
+		 */
+		if (fuidp == NULL)
+			return (UID_NOBODY);
+
+		switch (type) {
+		case ZFS_ACE_USER:
+		case ZFS_ACE_GROUP:
+			zfuid = list_head(&fuidp->z_fuids);
+			rid = FUID_RID(zfuid->z_logfuid);
+			idx = FUID_INDEX(zfuid->z_logfuid);
+			break;
+		case ZFS_OWNER:
+			rid = FUID_RID(fuidp->z_fuid_owner);
+			idx = FUID_INDEX(fuidp->z_fuid_owner);
+			break;
+		case ZFS_GROUP:
+			rid = FUID_RID(fuidp->z_fuid_group);
+			idx = FUID_INDEX(fuidp->z_fuid_group);
+			break;
+		};
+		domain = fuidp->z_domain_table[idx -1];
+	} else {
+		if (type == ZFS_OWNER || type == ZFS_ACE_USER)
+			status = kidmap_getsidbyuid(crgetzone(cr), id,
+			    &domain, &rid);
+		else
+			status = kidmap_getsidbygid(crgetzone(cr), id,
+			    &domain, &rid);
+
+		if (status != 0) {
+			/*
+			 * When returning nobody we will need to
+			 * make a dummy fuid table entry for logging
+			 * purposes.
+			 */
+			rid = UID_NOBODY;
+			domain = nulldomain;
+		}
+	}
+
+	idx = zfs_fuid_find_by_domain(zfsvfs, domain, &kdomain, B_TRUE);
+
+	if (!zfsvfs->z_replay)
+		zfs_fuid_node_add(fuidpp, kdomain,
+		    rid, idx, id, type);
+	else if (zfuid != NULL) {
+		list_remove(&fuidp->z_fuids, zfuid);
+		kmem_free(zfuid, sizeof (zfs_fuid_t));
+	}
+	return (FUID_ENCODE(idx, rid));
+}
+
+void
+zfs_fuid_destroy(zfsvfs_t *zfsvfs)
+{
+	rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER);
+	if (!zfsvfs->z_fuid_loaded) {
+		rw_exit(&zfsvfs->z_fuid_lock);
+		return;
+	}
+	zfs_fuid_table_destroy(&zfsvfs->z_fuid_idx, &zfsvfs->z_fuid_domain);
+	rw_exit(&zfsvfs->z_fuid_lock);
+}
+
+/*
+ * Allocate zfs_fuid_info for tracking FUIDs created during
+ * zfs_mknode, VOP_SETATTR() or VOP_SETSECATTR()
+ */
+zfs_fuid_info_t *
+zfs_fuid_info_alloc(void)
+{
+	zfs_fuid_info_t *fuidp;
+
+	fuidp = kmem_zalloc(sizeof (zfs_fuid_info_t), KM_SLEEP);
+	list_create(&fuidp->z_domains, sizeof (zfs_fuid_domain_t),
+	    offsetof(zfs_fuid_domain_t, z_next));
+	list_create(&fuidp->z_fuids, sizeof (zfs_fuid_t),
+	    offsetof(zfs_fuid_t, z_next));
+	return (fuidp);
+}
+
+/*
+ * Release all memory associated with zfs_fuid_info_t
+ */
+void
+zfs_fuid_info_free(zfs_fuid_info_t *fuidp)
+{
+	zfs_fuid_t *zfuid;
+	zfs_fuid_domain_t *zdomain;
+
+	while ((zfuid = list_head(&fuidp->z_fuids)) != NULL) {
+		list_remove(&fuidp->z_fuids, zfuid);
+		kmem_free(zfuid, sizeof (zfs_fuid_t));
+	}
+
+	if (fuidp->z_domain_table != NULL)
+		kmem_free(fuidp->z_domain_table,
+		    (sizeof (char **)) * fuidp->z_domain_cnt);
+
+	while ((zdomain = list_head(&fuidp->z_domains)) != NULL) {
+		list_remove(&fuidp->z_domains, zdomain);
+		kmem_free(zdomain, sizeof (zfs_fuid_domain_t));
+	}
+
+	kmem_free(fuidp, sizeof (zfs_fuid_info_t));
+}
+
+/*
+ * Check to see if id is a groupmember.  If cred
+ * has ksid info then sidlist is checked first
+ * and if still not found then POSIX groups are checked
+ *
+ * Will use a straight FUID compare when possible.
+ */
+boolean_t
+zfs_groupmember(zfsvfs_t *zfsvfs, uint64_t id, cred_t *cr)
+{
+	ksid_t		*ksid = crgetsid(cr, KSID_GROUP);
+	ksidlist_t	*ksidlist = crgetsidlist(cr);
+	uid_t		gid;
+
+	if (ksid && ksidlist) {
+		int 		i;
+		ksid_t		*ksid_groups;
+		uint32_t	idx = FUID_INDEX(id);
+		uint32_t	rid = FUID_RID(id);
+
+		ksid_groups = ksidlist->ksl_sids;
+
+		for (i = 0; i != ksidlist->ksl_nsid; i++) {
+			if (idx == 0) {
+				if (id != IDMAP_WK_CREATOR_GROUP_GID &&
+				    id == ksid_groups[i].ks_id) {
+					return (B_TRUE);
+				}
+			} else {
+				const char *domain;
+
+				domain = zfs_fuid_find_by_idx(zfsvfs, idx);
+				ASSERT(domain != NULL);
+
+				if (strcmp(domain,
+				    IDMAP_WK_CREATOR_SID_AUTHORITY) == 0)
+					return (B_FALSE);
+
+				if ((strcmp(domain,
+				    ksid_groups[i].ks_domain->kd_name) == 0) &&
+				    rid == ksid_groups[i].ks_rid)
+					return (B_TRUE);
+			}
+		}
+	}
+
+	/*
+	 * Not found in ksidlist, check posix groups
+	 */
+	gid = zfs_fuid_map_id(zfsvfs, id, cr, ZFS_GROUP);
+	return (groupmember(gid, cr));
+}
+
+void
+zfs_fuid_txhold(zfsvfs_t *zfsvfs, dmu_tx_t *tx)
+{
+	if (zfsvfs->z_fuid_obj == 0) {
+		dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
+		dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
+		    FUID_SIZE_ESTIMATE(zfsvfs));
+		dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL);
+	} else {
+		dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj);
+		dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0,
+		    FUID_SIZE_ESTIMATE(zfsvfs));
+	}
+}
+#endif
diff --git a/uts/common/fs/zfs/zfs_ioctl.c b/uts/common/fs/zfs/zfs_ioctl.c
new file mode 100644
index 000000000000..1b63c9bf45ef
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_ioctl.c
@@ -0,0 +1,5122 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/uio.h>
+#include <sys/buf.h>
+#include <sys/modctl.h>
+#include <sys/open.h>
+#include <sys/file.h>
+#include <sys/kmem.h>
+#include <sys/conf.h>
+#include <sys/cmn_err.h>
+#include <sys/stat.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/zfs_vfsops.h>
+#include <sys/zfs_znode.h>
+#include <sys/zap.h>
+#include <sys/spa.h>
+#include <sys/spa_impl.h>
+#include <sys/vdev.h>
+#include <sys/priv_impl.h>
+#include <sys/dmu.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_deleg.h>
+#include <sys/dmu_objset.h>
+#include <sys/ddi.h>
+#include <sys/sunddi.h>
+#include <sys/sunldi.h>
+#include <sys/policy.h>
+#include <sys/zone.h>
+#include <sys/nvpair.h>
+#include <sys/pathname.h>
+#include <sys/mount.h>
+#include <sys/sdt.h>
+#include <sys/fs/zfs.h>
+#include <sys/zfs_ctldir.h>
+#include <sys/zfs_dir.h>
+#include <sys/zfs_onexit.h>
+#include <sys/zvol.h>
+#include <sys/dsl_scan.h>
+#include <sharefs/share.h>
+#include <sys/dmu_objset.h>
+
+#include "zfs_namecheck.h"
+#include "zfs_prop.h"
+#include "zfs_deleg.h"
+#include "zfs_comutil.h"
+
+extern struct modlfs zfs_modlfs;
+
+extern void zfs_init(void);
+extern void zfs_fini(void);
+
+ldi_ident_t zfs_li = NULL;
+dev_info_t *zfs_dip;
+
+typedef int zfs_ioc_func_t(zfs_cmd_t *);
+typedef int zfs_secpolicy_func_t(zfs_cmd_t *, cred_t *);
+
+typedef enum {
+	NO_NAME,
+	POOL_NAME,
+	DATASET_NAME
+} zfs_ioc_namecheck_t;
+
+typedef enum {
+	POOL_CHECK_NONE		= 1 << 0,
+	POOL_CHECK_SUSPENDED	= 1 << 1,
+	POOL_CHECK_READONLY	= 1 << 2
+} zfs_ioc_poolcheck_t;
+
+typedef struct zfs_ioc_vec {
+	zfs_ioc_func_t		*zvec_func;
+	zfs_secpolicy_func_t	*zvec_secpolicy;
+	zfs_ioc_namecheck_t	zvec_namecheck;
+	boolean_t		zvec_his_log;
+	zfs_ioc_poolcheck_t	zvec_pool_check;
+} zfs_ioc_vec_t;
+
+/* This array is indexed by zfs_userquota_prop_t */
+static const char *userquota_perms[] = {
+	ZFS_DELEG_PERM_USERUSED,
+	ZFS_DELEG_PERM_USERQUOTA,
+	ZFS_DELEG_PERM_GROUPUSED,
+	ZFS_DELEG_PERM_GROUPQUOTA,
+};
+
+static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
+static int zfs_check_settable(const char *name, nvpair_t *property,
+    cred_t *cr);
+static int zfs_check_clearable(char *dataset, nvlist_t *props,
+    nvlist_t **errors);
+static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
+    boolean_t *);
+int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t **);
+
+/* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
+void
+__dprintf(const char *file, const char *func, int line, const char *fmt, ...)
+{
+	const char *newfile;
+	char buf[512];
+	va_list adx;
+
+	/*
+	 * Get rid of annoying "../common/" prefix to filename.
+	 */
+	newfile = strrchr(file, '/');
+	if (newfile != NULL) {
+		newfile = newfile + 1; /* Get rid of leading / */
+	} else {
+		newfile = file;
+	}
+
+	va_start(adx, fmt);
+	(void) vsnprintf(buf, sizeof (buf), fmt, adx);
+	va_end(adx);
+
+	/*
+	 * To get this data, use the zfs-dprintf probe as so:
+	 * dtrace -q -n 'zfs-dprintf \
+	 *	/stringof(arg0) == "dbuf.c"/ \
+	 *	{printf("%s: %s", stringof(arg1), stringof(arg3))}'
+	 * arg0 = file name
+	 * arg1 = function name
+	 * arg2 = line number
+	 * arg3 = message
+	 */
+	DTRACE_PROBE4(zfs__dprintf,
+	    char *, newfile, char *, func, int, line, char *, buf);
+}
+
+static void
+history_str_free(char *buf)
+{
+	kmem_free(buf, HIS_MAX_RECORD_LEN);
+}
+
+static char *
+history_str_get(zfs_cmd_t *zc)
+{
+	char *buf;
+
+	if (zc->zc_history == NULL)
+		return (NULL);
+
+	buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
+	if (copyinstr((void *)(uintptr_t)zc->zc_history,
+	    buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
+		history_str_free(buf);
+		return (NULL);
+	}
+
+	buf[HIS_MAX_RECORD_LEN -1] = '\0';
+
+	return (buf);
+}
+
+/*
+ * Check to see if the named dataset is currently defined as bootable
+ */
+static boolean_t
+zfs_is_bootfs(const char *name)
+{
+	objset_t *os;
+
+	if (dmu_objset_hold(name, FTAG, &os) == 0) {
+		boolean_t ret;
+		ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
+		dmu_objset_rele(os, FTAG);
+		return (ret);
+	}
+	return (B_FALSE);
+}
+
+/*
+ * zfs_earlier_version
+ *
+ *	Return non-zero if the spa version is less than requested version.
+ */
+static int
+zfs_earlier_version(const char *name, int version)
+{
+	spa_t *spa;
+
+	if (spa_open(name, &spa, FTAG) == 0) {
+		if (spa_version(spa) < version) {
+			spa_close(spa, FTAG);
+			return (1);
+		}
+		spa_close(spa, FTAG);
+	}
+	return (0);
+}
+
+/*
+ * zpl_earlier_version
+ *
+ * Return TRUE if the ZPL version is less than requested version.
+ */
+static boolean_t
+zpl_earlier_version(const char *name, int version)
+{
+	objset_t *os;
+	boolean_t rc = B_TRUE;
+
+	if (dmu_objset_hold(name, FTAG, &os) == 0) {
+		uint64_t zplversion;
+
+		if (dmu_objset_type(os) != DMU_OST_ZFS) {
+			dmu_objset_rele(os, FTAG);
+			return (B_TRUE);
+		}
+		/* XXX reading from non-owned objset */
+		if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
+			rc = zplversion < version;
+		dmu_objset_rele(os, FTAG);
+	}
+	return (rc);
+}
+
+static void
+zfs_log_history(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	char *buf;
+
+	if ((buf = history_str_get(zc)) == NULL)
+		return;
+
+	if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
+		if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
+			(void) spa_history_log(spa, buf, LOG_CMD_NORMAL);
+		spa_close(spa, FTAG);
+	}
+	history_str_free(buf);
+}
+
+/*
+ * Policy for top-level read operations (list pools).  Requires no privileges,
+ * and can be used in the local zone, as there is no associated dataset.
+ */
+/* ARGSUSED */
+static int
+zfs_secpolicy_none(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (0);
+}
+
+/*
+ * Policy for dataset read operations (list children, get statistics).  Requires
+ * no privileges, but must be visible in the local zone.
+ */
+/* ARGSUSED */
+static int
+zfs_secpolicy_read(zfs_cmd_t *zc, cred_t *cr)
+{
+	if (INGLOBALZONE(curproc) ||
+	    zone_dataset_visible(zc->zc_name, NULL))
+		return (0);
+
+	return (ENOENT);
+}
+
+static int
+zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
+{
+	int writable = 1;
+
+	/*
+	 * The dataset must be visible by this zone -- check this first
+	 * so they don't see EPERM on something they shouldn't know about.
+	 */
+	if (!INGLOBALZONE(curproc) &&
+	    !zone_dataset_visible(dataset, &writable))
+		return (ENOENT);
+
+	if (INGLOBALZONE(curproc)) {
+		/*
+		 * If the fs is zoned, only root can access it from the
+		 * global zone.
+		 */
+		if (secpolicy_zfs(cr) && zoned)
+			return (EPERM);
+	} else {
+		/*
+		 * If we are in a local zone, the 'zoned' property must be set.
+		 */
+		if (!zoned)
+			return (EPERM);
+
+		/* must be writable by this zone */
+		if (!writable)
+			return (EPERM);
+	}
+	return (0);
+}
+
+static int
+zfs_dozonecheck(const char *dataset, cred_t *cr)
+{
+	uint64_t zoned;
+
+	if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
+		return (ENOENT);
+
+	return (zfs_dozonecheck_impl(dataset, zoned, cr));
+}
+
+static int
+zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
+{
+	uint64_t zoned;
+
+	rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
+	if (dsl_prop_get_ds(ds, "zoned", 8, 1, &zoned, NULL)) {
+		rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
+		return (ENOENT);
+	}
+	rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
+
+	return (zfs_dozonecheck_impl(dataset, zoned, cr));
+}
+
+int
+zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
+{
+	int error;
+
+	error = zfs_dozonecheck(name, cr);
+	if (error == 0) {
+		error = secpolicy_zfs(cr);
+		if (error)
+			error = dsl_deleg_access(name, perm, cr);
+	}
+	return (error);
+}
+
+int
+zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
+    const char *perm, cred_t *cr)
+{
+	int error;
+
+	error = zfs_dozonecheck_ds(name, ds, cr);
+	if (error == 0) {
+		error = secpolicy_zfs(cr);
+		if (error)
+			error = dsl_deleg_access_impl(ds, perm, cr);
+	}
+	return (error);
+}
+
+/*
+ * Policy for setting the security label property.
+ *
+ * Returns 0 for success, non-zero for access and other errors.
+ */
+static int
+zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
+{
+	char		ds_hexsl[MAXNAMELEN];
+	bslabel_t	ds_sl, new_sl;
+	boolean_t	new_default = FALSE;
+	uint64_t	zoned;
+	int		needed_priv = -1;
+	int		error;
+
+	/* First get the existing dataset label. */
+	error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
+	    1, sizeof (ds_hexsl), &ds_hexsl, NULL);
+	if (error)
+		return (EPERM);
+
+	if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
+		new_default = TRUE;
+
+	/* The label must be translatable */
+	if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
+		return (EINVAL);
+
+	/*
+	 * In a non-global zone, disallow attempts to set a label that
+	 * doesn't match that of the zone; otherwise no other checks
+	 * are needed.
+	 */
+	if (!INGLOBALZONE(curproc)) {
+		if (new_default || !blequal(&new_sl, CR_SL(CRED())))
+			return (EPERM);
+		return (0);
+	}
+
+	/*
+	 * For global-zone datasets (i.e., those whose zoned property is
+	 * "off", verify that the specified new label is valid for the
+	 * global zone.
+	 */
+	if (dsl_prop_get_integer(name,
+	    zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
+		return (EPERM);
+	if (!zoned) {
+		if (zfs_check_global_label(name, strval) != 0)
+			return (EPERM);
+	}
+
+	/*
+	 * If the existing dataset label is nondefault, check if the
+	 * dataset is mounted (label cannot be changed while mounted).
+	 * Get the zfsvfs; if there isn't one, then the dataset isn't
+	 * mounted (or isn't a dataset, doesn't exist, ...).
+	 */
+	if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
+		objset_t *os;
+		static char *setsl_tag = "setsl_tag";
+
+		/*
+		 * Try to own the dataset; abort if there is any error,
+		 * (e.g., already mounted, in use, or other error).
+		 */
+		error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
+		    setsl_tag, &os);
+		if (error)
+			return (EPERM);
+
+		dmu_objset_disown(os, setsl_tag);
+
+		if (new_default) {
+			needed_priv = PRIV_FILE_DOWNGRADE_SL;
+			goto out_check;
+		}
+
+		if (hexstr_to_label(strval, &new_sl) != 0)
+			return (EPERM);
+
+		if (blstrictdom(&ds_sl, &new_sl))
+			needed_priv = PRIV_FILE_DOWNGRADE_SL;
+		else if (blstrictdom(&new_sl, &ds_sl))
+			needed_priv = PRIV_FILE_UPGRADE_SL;
+	} else {
+		/* dataset currently has a default label */
+		if (!new_default)
+			needed_priv = PRIV_FILE_UPGRADE_SL;
+	}
+
+out_check:
+	if (needed_priv != -1)
+		return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
+	return (0);
+}
+
+static int
+zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
+    cred_t *cr)
+{
+	char *strval;
+
+	/*
+	 * Check permissions for special properties.
+	 */
+	switch (prop) {
+	case ZFS_PROP_ZONED:
+		/*
+		 * Disallow setting of 'zoned' from within a local zone.
+		 */
+		if (!INGLOBALZONE(curproc))
+			return (EPERM);
+		break;
+
+	case ZFS_PROP_QUOTA:
+		if (!INGLOBALZONE(curproc)) {
+			uint64_t zoned;
+			char setpoint[MAXNAMELEN];
+			/*
+			 * Unprivileged users are allowed to modify the
+			 * quota on things *under* (ie. contained by)
+			 * the thing they own.
+			 */
+			if (dsl_prop_get_integer(dsname, "zoned", &zoned,
+			    setpoint))
+				return (EPERM);
+			if (!zoned || strlen(dsname) <= strlen(setpoint))
+				return (EPERM);
+		}
+		break;
+
+	case ZFS_PROP_MLSLABEL:
+		if (!is_system_labeled())
+			return (EPERM);
+
+		if (nvpair_value_string(propval, &strval) == 0) {
+			int err;
+
+			err = zfs_set_slabel_policy(dsname, strval, CRED());
+			if (err != 0)
+				return (err);
+		}
+		break;
+	}
+
+	return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
+}
+
+int
+zfs_secpolicy_fsacl(zfs_cmd_t *zc, cred_t *cr)
+{
+	int error;
+
+	error = zfs_dozonecheck(zc->zc_name, cr);
+	if (error)
+		return (error);
+
+	/*
+	 * permission to set permissions will be evaluated later in
+	 * dsl_deleg_can_allow()
+	 */
+	return (0);
+}
+
+int
+zfs_secpolicy_rollback(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_ROLLBACK, cr));
+}
+
+int
+zfs_secpolicy_send(zfs_cmd_t *zc, cred_t *cr)
+{
+	spa_t *spa;
+	dsl_pool_t *dp;
+	dsl_dataset_t *ds;
+	char *cp;
+	int error;
+
+	/*
+	 * Generate the current snapshot name from the given objsetid, then
+	 * use that name for the secpolicy/zone checks.
+	 */
+	cp = strchr(zc->zc_name, '@');
+	if (cp == NULL)
+		return (EINVAL);
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error)
+		return (error);
+
+	dp = spa_get_dsl(spa);
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+	error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
+	rw_exit(&dp->dp_config_rwlock);
+	spa_close(spa, FTAG);
+	if (error)
+		return (error);
+
+	dsl_dataset_name(ds, zc->zc_name);
+
+	error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
+	    ZFS_DELEG_PERM_SEND, cr);
+	dsl_dataset_rele(ds, FTAG);
+
+	return (error);
+}
+
+static int
+zfs_secpolicy_deleg_share(zfs_cmd_t *zc, cred_t *cr)
+{
+	vnode_t *vp;
+	int error;
+
+	if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
+	    NO_FOLLOW, NULL, &vp)) != 0)
+		return (error);
+
+	/* Now make sure mntpnt and dataset are ZFS */
+
+	if (vp->v_vfsp->vfs_fstype != zfsfstype ||
+	    (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
+	    zc->zc_name) != 0)) {
+		VN_RELE(vp);
+		return (EPERM);
+	}
+
+	VN_RELE(vp);
+	return (dsl_deleg_access(zc->zc_name,
+	    ZFS_DELEG_PERM_SHARE, cr));
+}
+
+int
+zfs_secpolicy_share(zfs_cmd_t *zc, cred_t *cr)
+{
+	if (!INGLOBALZONE(curproc))
+		return (EPERM);
+
+	if (secpolicy_nfs(cr) == 0) {
+		return (0);
+	} else {
+		return (zfs_secpolicy_deleg_share(zc, cr));
+	}
+}
+
+int
+zfs_secpolicy_smb_acl(zfs_cmd_t *zc, cred_t *cr)
+{
+	if (!INGLOBALZONE(curproc))
+		return (EPERM);
+
+	if (secpolicy_smb(cr) == 0) {
+		return (0);
+	} else {
+		return (zfs_secpolicy_deleg_share(zc, cr));
+	}
+}
+
+static int
+zfs_get_parent(const char *datasetname, char *parent, int parentsize)
+{
+	char *cp;
+
+	/*
+	 * Remove the @bla or /bla from the end of the name to get the parent.
+	 */
+	(void) strncpy(parent, datasetname, parentsize);
+	cp = strrchr(parent, '@');
+	if (cp != NULL) {
+		cp[0] = '\0';
+	} else {
+		cp = strrchr(parent, '/');
+		if (cp == NULL)
+			return (ENOENT);
+		cp[0] = '\0';
+	}
+
+	return (0);
+}
+
+int
+zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
+{
+	int error;
+
+	if ((error = zfs_secpolicy_write_perms(name,
+	    ZFS_DELEG_PERM_MOUNT, cr)) != 0)
+		return (error);
+
+	return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
+}
+
+static int
+zfs_secpolicy_destroy(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
+}
+
+/*
+ * Destroying snapshots with delegated permissions requires
+ * descendent mount and destroy permissions.
+ * Reassemble the full filesystem@snap name so dsl_deleg_access()
+ * can do the correct permission check.
+ *
+ * Since this routine is used when doing a recursive destroy of snapshots
+ * and destroying snapshots requires descendent permissions, a successfull
+ * check of the top level snapshot applies to snapshots of all descendent
+ * datasets as well.
+ */
+static int
+zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, cred_t *cr)
+{
+	int error;
+	char *dsname;
+
+	dsname = kmem_asprintf("%s@%s", zc->zc_name, zc->zc_value);
+
+	error = zfs_secpolicy_destroy_perms(dsname, cr);
+
+	strfree(dsname);
+	return (error);
+}
+
+int
+zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
+{
+	char	parentname[MAXNAMELEN];
+	int	error;
+
+	if ((error = zfs_secpolicy_write_perms(from,
+	    ZFS_DELEG_PERM_RENAME, cr)) != 0)
+		return (error);
+
+	if ((error = zfs_secpolicy_write_perms(from,
+	    ZFS_DELEG_PERM_MOUNT, cr)) != 0)
+		return (error);
+
+	if ((error = zfs_get_parent(to, parentname,
+	    sizeof (parentname))) != 0)
+		return (error);
+
+	if ((error = zfs_secpolicy_write_perms(parentname,
+	    ZFS_DELEG_PERM_CREATE, cr)) != 0)
+		return (error);
+
+	if ((error = zfs_secpolicy_write_perms(parentname,
+	    ZFS_DELEG_PERM_MOUNT, cr)) != 0)
+		return (error);
+
+	return (error);
+}
+
+static int
+zfs_secpolicy_rename(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
+}
+
+static int
+zfs_secpolicy_promote(zfs_cmd_t *zc, cred_t *cr)
+{
+	char	parentname[MAXNAMELEN];
+	objset_t *clone;
+	int error;
+
+	error = zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_PROMOTE, cr);
+	if (error)
+		return (error);
+
+	error = dmu_objset_hold(zc->zc_name, FTAG, &clone);
+
+	if (error == 0) {
+		dsl_dataset_t *pclone = NULL;
+		dsl_dir_t *dd;
+		dd = clone->os_dsl_dataset->ds_dir;
+
+		rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER);
+		error = dsl_dataset_hold_obj(dd->dd_pool,
+		    dd->dd_phys->dd_origin_obj, FTAG, &pclone);
+		rw_exit(&dd->dd_pool->dp_config_rwlock);
+		if (error) {
+			dmu_objset_rele(clone, FTAG);
+			return (error);
+		}
+
+		error = zfs_secpolicy_write_perms(zc->zc_name,
+		    ZFS_DELEG_PERM_MOUNT, cr);
+
+		dsl_dataset_name(pclone, parentname);
+		dmu_objset_rele(clone, FTAG);
+		dsl_dataset_rele(pclone, FTAG);
+		if (error == 0)
+			error = zfs_secpolicy_write_perms(parentname,
+			    ZFS_DELEG_PERM_PROMOTE, cr);
+	}
+	return (error);
+}
+
+static int
+zfs_secpolicy_receive(zfs_cmd_t *zc, cred_t *cr)
+{
+	int error;
+
+	if ((error = zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
+		return (error);
+
+	if ((error = zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_MOUNT, cr)) != 0)
+		return (error);
+
+	return (zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_CREATE, cr));
+}
+
+int
+zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
+{
+	return (zfs_secpolicy_write_perms(name,
+	    ZFS_DELEG_PERM_SNAPSHOT, cr));
+}
+
+static int
+zfs_secpolicy_snapshot(zfs_cmd_t *zc, cred_t *cr)
+{
+
+	return (zfs_secpolicy_snapshot_perms(zc->zc_name, cr));
+}
+
+static int
+zfs_secpolicy_create(zfs_cmd_t *zc, cred_t *cr)
+{
+	char	parentname[MAXNAMELEN];
+	int	error;
+
+	if ((error = zfs_get_parent(zc->zc_name, parentname,
+	    sizeof (parentname))) != 0)
+		return (error);
+
+	if (zc->zc_value[0] != '\0') {
+		if ((error = zfs_secpolicy_write_perms(zc->zc_value,
+		    ZFS_DELEG_PERM_CLONE, cr)) != 0)
+			return (error);
+	}
+
+	if ((error = zfs_secpolicy_write_perms(parentname,
+	    ZFS_DELEG_PERM_CREATE, cr)) != 0)
+		return (error);
+
+	error = zfs_secpolicy_write_perms(parentname,
+	    ZFS_DELEG_PERM_MOUNT, cr);
+
+	return (error);
+}
+
+static int
+zfs_secpolicy_umount(zfs_cmd_t *zc, cred_t *cr)
+{
+	int error;
+
+	error = secpolicy_fs_unmount(cr, NULL);
+	if (error) {
+		error = dsl_deleg_access(zc->zc_name, ZFS_DELEG_PERM_MOUNT, cr);
+	}
+	return (error);
+}
+
+/*
+ * Policy for pool operations - create/destroy pools, add vdevs, etc.  Requires
+ * SYS_CONFIG privilege, which is not available in a local zone.
+ */
+/* ARGSUSED */
+static int
+zfs_secpolicy_config(zfs_cmd_t *zc, cred_t *cr)
+{
+	if (secpolicy_sys_config(cr, B_FALSE) != 0)
+		return (EPERM);
+
+	return (0);
+}
+
+/*
+ * Policy for object to name lookups.
+ */
+/* ARGSUSED */
+static int
+zfs_secpolicy_diff(zfs_cmd_t *zc, cred_t *cr)
+{
+	int error;
+
+	if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
+		return (0);
+
+	error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
+	return (error);
+}
+
+/*
+ * Policy for fault injection.  Requires all privileges.
+ */
+/* ARGSUSED */
+static int
+zfs_secpolicy_inject(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (secpolicy_zinject(cr));
+}
+
+static int
+zfs_secpolicy_inherit(zfs_cmd_t *zc, cred_t *cr)
+{
+	zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
+
+	if (prop == ZPROP_INVAL) {
+		if (!zfs_prop_user(zc->zc_value))
+			return (EINVAL);
+		return (zfs_secpolicy_write_perms(zc->zc_name,
+		    ZFS_DELEG_PERM_USERPROP, cr));
+	} else {
+		return (zfs_secpolicy_setprop(zc->zc_name, prop,
+		    NULL, cr));
+	}
+}
+
+static int
+zfs_secpolicy_userspace_one(zfs_cmd_t *zc, cred_t *cr)
+{
+	int err = zfs_secpolicy_read(zc, cr);
+	if (err)
+		return (err);
+
+	if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
+		return (EINVAL);
+
+	if (zc->zc_value[0] == 0) {
+		/*
+		 * They are asking about a posix uid/gid.  If it's
+		 * themself, allow it.
+		 */
+		if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
+		    zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
+			if (zc->zc_guid == crgetuid(cr))
+				return (0);
+		} else {
+			if (groupmember(zc->zc_guid, cr))
+				return (0);
+		}
+	}
+
+	return (zfs_secpolicy_write_perms(zc->zc_name,
+	    userquota_perms[zc->zc_objset_type], cr));
+}
+
+static int
+zfs_secpolicy_userspace_many(zfs_cmd_t *zc, cred_t *cr)
+{
+	int err = zfs_secpolicy_read(zc, cr);
+	if (err)
+		return (err);
+
+	if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
+		return (EINVAL);
+
+	return (zfs_secpolicy_write_perms(zc->zc_name,
+	    userquota_perms[zc->zc_objset_type], cr));
+}
+
+static int
+zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
+	    NULL, cr));
+}
+
+static int
+zfs_secpolicy_hold(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_HOLD, cr));
+}
+
+static int
+zfs_secpolicy_release(zfs_cmd_t *zc, cred_t *cr)
+{
+	return (zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_RELEASE, cr));
+}
+
+/*
+ * Policy for allowing temporary snapshots to be taken or released
+ */
+static int
+zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, cred_t *cr)
+{
+	/*
+	 * A temporary snapshot is the same as a snapshot,
+	 * hold, destroy and release all rolled into one.
+	 * Delegated diff alone is sufficient that we allow this.
+	 */
+	int error;
+
+	if ((error = zfs_secpolicy_write_perms(zc->zc_name,
+	    ZFS_DELEG_PERM_DIFF, cr)) == 0)
+		return (0);
+
+	error = zfs_secpolicy_snapshot(zc, cr);
+	if (!error)
+		error = zfs_secpolicy_hold(zc, cr);
+	if (!error)
+		error = zfs_secpolicy_release(zc, cr);
+	if (!error)
+		error = zfs_secpolicy_destroy(zc, cr);
+	return (error);
+}
+
+/*
+ * Returns the nvlist as specified by the user in the zfs_cmd_t.
+ */
+static int
+get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
+{
+	char *packed;
+	int error;
+	nvlist_t *list = NULL;
+
+	/*
+	 * Read in and unpack the user-supplied nvlist.
+	 */
+	if (size == 0)
+		return (EINVAL);
+
+	packed = kmem_alloc(size, KM_SLEEP);
+
+	if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
+	    iflag)) != 0) {
+		kmem_free(packed, size);
+		return (error);
+	}
+
+	if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
+		kmem_free(packed, size);
+		return (error);
+	}
+
+	kmem_free(packed, size);
+
+	*nvp = list;
+	return (0);
+}
+
+static int
+fit_error_list(zfs_cmd_t *zc, nvlist_t **errors)
+{
+	size_t size;
+
+	VERIFY(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0);
+
+	if (size > zc->zc_nvlist_dst_size) {
+		nvpair_t *more_errors;
+		int n = 0;
+
+		if (zc->zc_nvlist_dst_size < 1024)
+			return (ENOMEM);
+
+		VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, 0) == 0);
+		more_errors = nvlist_prev_nvpair(*errors, NULL);
+
+		do {
+			nvpair_t *pair = nvlist_prev_nvpair(*errors,
+			    more_errors);
+			VERIFY(nvlist_remove_nvpair(*errors, pair) == 0);
+			n++;
+			VERIFY(nvlist_size(*errors, &size,
+			    NV_ENCODE_NATIVE) == 0);
+		} while (size > zc->zc_nvlist_dst_size);
+
+		VERIFY(nvlist_remove_nvpair(*errors, more_errors) == 0);
+		VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, n) == 0);
+		ASSERT(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0);
+		ASSERT(size <= zc->zc_nvlist_dst_size);
+	}
+
+	return (0);
+}
+
+static int
+put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
+{
+	char *packed = NULL;
+	int error = 0;
+	size_t size;
+
+	VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0);
+
+	if (size > zc->zc_nvlist_dst_size) {
+		error = ENOMEM;
+	} else {
+		packed = kmem_alloc(size, KM_SLEEP);
+		VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE,
+		    KM_SLEEP) == 0);
+		if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
+		    size, zc->zc_iflags) != 0)
+			error = EFAULT;
+		kmem_free(packed, size);
+	}
+
+	zc->zc_nvlist_dst_size = size;
+	return (error);
+}
+
+static int
+getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
+{
+	objset_t *os;
+	int error;
+
+	error = dmu_objset_hold(dsname, FTAG, &os);
+	if (error)
+		return (error);
+	if (dmu_objset_type(os) != DMU_OST_ZFS) {
+		dmu_objset_rele(os, FTAG);
+		return (EINVAL);
+	}
+
+	mutex_enter(&os->os_user_ptr_lock);
+	*zfvp = dmu_objset_get_user(os);
+	if (*zfvp) {
+		VFS_HOLD((*zfvp)->z_vfs);
+	} else {
+		error = ESRCH;
+	}
+	mutex_exit(&os->os_user_ptr_lock);
+	dmu_objset_rele(os, FTAG);
+	return (error);
+}
+
+/*
+ * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
+ * case its z_vfs will be NULL, and it will be opened as the owner.
+ */
+static int
+zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
+{
+	int error = 0;
+
+	if (getzfsvfs(name, zfvp) != 0)
+		error = zfsvfs_create(name, zfvp);
+	if (error == 0) {
+		rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
+		    RW_READER, tag);
+		if ((*zfvp)->z_unmounted) {
+			/*
+			 * XXX we could probably try again, since the unmounting
+			 * thread should be just about to disassociate the
+			 * objset from the zfsvfs.
+			 */
+			rrw_exit(&(*zfvp)->z_teardown_lock, tag);
+			return (EBUSY);
+		}
+	}
+	return (error);
+}
+
+static void
+zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
+{
+	rrw_exit(&zfsvfs->z_teardown_lock, tag);
+
+	if (zfsvfs->z_vfs) {
+		VFS_RELE(zfsvfs->z_vfs);
+	} else {
+		dmu_objset_disown(zfsvfs->z_os, zfsvfs);
+		zfsvfs_free(zfsvfs);
+	}
+}
+
+static int
+zfs_ioc_pool_create(zfs_cmd_t *zc)
+{
+	int error;
+	nvlist_t *config, *props = NULL;
+	nvlist_t *rootprops = NULL;
+	nvlist_t *zplprops = NULL;
+	char *buf;
+
+	if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
+	    zc->zc_iflags, &config))
+		return (error);
+
+	if (zc->zc_nvlist_src_size != 0 && (error =
+	    get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &props))) {
+		nvlist_free(config);
+		return (error);
+	}
+
+	if (props) {
+		nvlist_t *nvl = NULL;
+		uint64_t version = SPA_VERSION;
+
+		(void) nvlist_lookup_uint64(props,
+		    zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
+		if (version < SPA_VERSION_INITIAL || version > SPA_VERSION) {
+			error = EINVAL;
+			goto pool_props_bad;
+		}
+		(void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
+		if (nvl) {
+			error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
+			if (error != 0) {
+				nvlist_free(config);
+				nvlist_free(props);
+				return (error);
+			}
+			(void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
+		}
+		VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		error = zfs_fill_zplprops_root(version, rootprops,
+		    zplprops, NULL);
+		if (error)
+			goto pool_props_bad;
+	}
+
+	buf = history_str_get(zc);
+
+	error = spa_create(zc->zc_name, config, props, buf, zplprops);
+
+	/*
+	 * Set the remaining root properties
+	 */
+	if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
+	    ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
+		(void) spa_destroy(zc->zc_name);
+
+	if (buf != NULL)
+		history_str_free(buf);
+
+pool_props_bad:
+	nvlist_free(rootprops);
+	nvlist_free(zplprops);
+	nvlist_free(config);
+	nvlist_free(props);
+
+	return (error);
+}
+
+static int
+zfs_ioc_pool_destroy(zfs_cmd_t *zc)
+{
+	int error;
+	zfs_log_history(zc);
+	error = spa_destroy(zc->zc_name);
+	if (error == 0)
+		zvol_remove_minors(zc->zc_name);
+	return (error);
+}
+
+static int
+zfs_ioc_pool_import(zfs_cmd_t *zc)
+{
+	nvlist_t *config, *props = NULL;
+	uint64_t guid;
+	int error;
+
+	if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
+	    zc->zc_iflags, &config)) != 0)
+		return (error);
+
+	if (zc->zc_nvlist_src_size != 0 && (error =
+	    get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &props))) {
+		nvlist_free(config);
+		return (error);
+	}
+
+	if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
+	    guid != zc->zc_guid)
+		error = EINVAL;
+	else
+		error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
+
+	if (zc->zc_nvlist_dst != 0) {
+		int err;
+
+		if ((err = put_nvlist(zc, config)) != 0)
+			error = err;
+	}
+
+	nvlist_free(config);
+
+	if (props)
+		nvlist_free(props);
+
+	return (error);
+}
+
+static int
+zfs_ioc_pool_export(zfs_cmd_t *zc)
+{
+	int error;
+	boolean_t force = (boolean_t)zc->zc_cookie;
+	boolean_t hardforce = (boolean_t)zc->zc_guid;
+
+	zfs_log_history(zc);
+	error = spa_export(zc->zc_name, NULL, force, hardforce);
+	if (error == 0)
+		zvol_remove_minors(zc->zc_name);
+	return (error);
+}
+
+static int
+zfs_ioc_pool_configs(zfs_cmd_t *zc)
+{
+	nvlist_t *configs;
+	int error;
+
+	if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
+		return (EEXIST);
+
+	error = put_nvlist(zc, configs);
+
+	nvlist_free(configs);
+
+	return (error);
+}
+
+static int
+zfs_ioc_pool_stats(zfs_cmd_t *zc)
+{
+	nvlist_t *config;
+	int error;
+	int ret = 0;
+
+	error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
+	    sizeof (zc->zc_value));
+
+	if (config != NULL) {
+		ret = put_nvlist(zc, config);
+		nvlist_free(config);
+
+		/*
+		 * The config may be present even if 'error' is non-zero.
+		 * In this case we return success, and preserve the real errno
+		 * in 'zc_cookie'.
+		 */
+		zc->zc_cookie = error;
+	} else {
+		ret = error;
+	}
+
+	return (ret);
+}
+
+/*
+ * Try to import the given pool, returning pool stats as appropriate so that
+ * user land knows which devices are available and overall pool health.
+ */
+static int
+zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
+{
+	nvlist_t *tryconfig, *config;
+	int error;
+
+	if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
+	    zc->zc_iflags, &tryconfig)) != 0)
+		return (error);
+
+	config = spa_tryimport(tryconfig);
+
+	nvlist_free(tryconfig);
+
+	if (config == NULL)
+		return (EINVAL);
+
+	error = put_nvlist(zc, config);
+	nvlist_free(config);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name              name of the pool
+ * zc_cookie            scan func (pool_scan_func_t)
+ */
+static int
+zfs_ioc_pool_scan(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	if (zc->zc_cookie == POOL_SCAN_NONE)
+		error = spa_scan_stop(spa);
+	else
+		error = spa_scan(spa, zc->zc_cookie);
+
+	spa_close(spa, FTAG);
+
+	return (error);
+}
+
+static int
+zfs_ioc_pool_freeze(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error == 0) {
+		spa_freeze(spa);
+		spa_close(spa, FTAG);
+	}
+	return (error);
+}
+
+static int
+zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	if (zc->zc_cookie < spa_version(spa) || zc->zc_cookie > SPA_VERSION) {
+		spa_close(spa, FTAG);
+		return (EINVAL);
+	}
+
+	spa_upgrade(spa, zc->zc_cookie);
+	spa_close(spa, FTAG);
+
+	return (error);
+}
+
+static int
+zfs_ioc_pool_get_history(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	char *hist_buf;
+	uint64_t size;
+	int error;
+
+	if ((size = zc->zc_history_len) == 0)
+		return (EINVAL);
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
+		spa_close(spa, FTAG);
+		return (ENOTSUP);
+	}
+
+	hist_buf = kmem_alloc(size, KM_SLEEP);
+	if ((error = spa_history_get(spa, &zc->zc_history_offset,
+	    &zc->zc_history_len, hist_buf)) == 0) {
+		error = ddi_copyout(hist_buf,
+		    (void *)(uintptr_t)zc->zc_history,
+		    zc->zc_history_len, zc->zc_iflags);
+	}
+
+	spa_close(spa, FTAG);
+	kmem_free(hist_buf, size);
+	return (error);
+}
+
+static int
+zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
+{
+	int error;
+
+	if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value))
+		return (error);
+
+	return (0);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_obj		object to find
+ *
+ * outputs:
+ * zc_value		name of object
+ */
+static int
+zfs_ioc_obj_to_path(zfs_cmd_t *zc)
+{
+	objset_t *os;
+	int error;
+
+	/* XXX reading from objset not owned */
+	if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
+		return (error);
+	if (dmu_objset_type(os) != DMU_OST_ZFS) {
+		dmu_objset_rele(os, FTAG);
+		return (EINVAL);
+	}
+	error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
+	    sizeof (zc->zc_value));
+	dmu_objset_rele(os, FTAG);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_obj		object to find
+ *
+ * outputs:
+ * zc_stat		stats on object
+ * zc_value		path to object
+ */
+static int
+zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
+{
+	objset_t *os;
+	int error;
+
+	/* XXX reading from objset not owned */
+	if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
+		return (error);
+	if (dmu_objset_type(os) != DMU_OST_ZFS) {
+		dmu_objset_rele(os, FTAG);
+		return (EINVAL);
+	}
+	error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
+	    sizeof (zc->zc_value));
+	dmu_objset_rele(os, FTAG);
+
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_add(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+	nvlist_t *config, **l2cache, **spares;
+	uint_t nl2cache = 0, nspares = 0;
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error != 0)
+		return (error);
+
+	error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
+	    zc->zc_iflags, &config);
+	(void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
+	    &l2cache, &nl2cache);
+
+	(void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
+	    &spares, &nspares);
+
+	/*
+	 * A root pool with concatenated devices is not supported.
+	 * Thus, can not add a device to a root pool.
+	 *
+	 * Intent log device can not be added to a rootpool because
+	 * during mountroot, zil is replayed, a seperated log device
+	 * can not be accessed during the mountroot time.
+	 *
+	 * l2cache and spare devices are ok to be added to a rootpool.
+	 */
+	if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
+		nvlist_free(config);
+		spa_close(spa, FTAG);
+		return (EDOM);
+	}
+
+	if (error == 0) {
+		error = spa_vdev_add(spa, config);
+		nvlist_free(config);
+	}
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of the pool
+ * zc_nvlist_conf	nvlist of devices to remove
+ * zc_cookie		to stop the remove?
+ */
+static int
+zfs_ioc_vdev_remove(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error != 0)
+		return (error);
+	error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+	vdev_state_t newstate = VDEV_STATE_UNKNOWN;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+	switch (zc->zc_cookie) {
+	case VDEV_STATE_ONLINE:
+		error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
+		break;
+
+	case VDEV_STATE_OFFLINE:
+		error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
+		break;
+
+	case VDEV_STATE_FAULTED:
+		if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
+		    zc->zc_obj != VDEV_AUX_EXTERNAL)
+			zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
+
+		error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
+		break;
+
+	case VDEV_STATE_DEGRADED:
+		if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
+		    zc->zc_obj != VDEV_AUX_EXTERNAL)
+			zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
+
+		error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
+		break;
+
+	default:
+		error = EINVAL;
+	}
+	zc->zc_cookie = newstate;
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_attach(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int replacing = zc->zc_cookie;
+	nvlist_t *config;
+	int error;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
+	    zc->zc_iflags, &config)) == 0) {
+		error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
+		nvlist_free(config);
+	}
+
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_detach(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
+
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_split(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	nvlist_t *config, *props = NULL;
+	int error;
+	boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
+	    zc->zc_iflags, &config)) {
+		spa_close(spa, FTAG);
+		return (error);
+	}
+
+	if (zc->zc_nvlist_src_size != 0 && (error =
+	    get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &props))) {
+		spa_close(spa, FTAG);
+		nvlist_free(config);
+		return (error);
+	}
+
+	error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
+
+	spa_close(spa, FTAG);
+
+	nvlist_free(config);
+	nvlist_free(props);
+
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	char *path = zc->zc_value;
+	uint64_t guid = zc->zc_guid;
+	int error;
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error != 0)
+		return (error);
+
+	error = spa_vdev_setpath(spa, guid, path);
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	char *fru = zc->zc_value;
+	uint64_t guid = zc->zc_guid;
+	int error;
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error != 0)
+		return (error);
+
+	error = spa_vdev_setfru(spa, guid, fru);
+	spa_close(spa, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
+{
+	int error = 0;
+	nvlist_t *nv;
+
+	dmu_objset_fast_stat(os, &zc->zc_objset_stats);
+
+	if (zc->zc_nvlist_dst != 0 &&
+	    (error = dsl_prop_get_all(os, &nv)) == 0) {
+		dmu_objset_stats(os, nv);
+		/*
+		 * NB: zvol_get_stats() will read the objset contents,
+		 * which we aren't supposed to do with a
+		 * DS_MODE_USER hold, because it could be
+		 * inconsistent.  So this is a bit of a workaround...
+		 * XXX reading with out owning
+		 */
+		if (!zc->zc_objset_stats.dds_inconsistent) {
+			if (dmu_objset_type(os) == DMU_OST_ZVOL)
+				VERIFY(zvol_get_stats(os, nv) == 0);
+		}
+		error = put_nvlist(zc, nv);
+		nvlist_free(nv);
+	}
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_nvlist_dst_size	size of buffer for property nvlist
+ *
+ * outputs:
+ * zc_objset_stats	stats
+ * zc_nvlist_dst	property nvlist
+ * zc_nvlist_dst_size	size of property nvlist
+ */
+static int
+zfs_ioc_objset_stats(zfs_cmd_t *zc)
+{
+	objset_t *os = NULL;
+	int error;
+
+	if (error = dmu_objset_hold(zc->zc_name, FTAG, &os))
+		return (error);
+
+	error = zfs_ioc_objset_stats_impl(zc, os);
+
+	dmu_objset_rele(os, FTAG);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_nvlist_dst_size	size of buffer for property nvlist
+ *
+ * outputs:
+ * zc_nvlist_dst	received property nvlist
+ * zc_nvlist_dst_size	size of received property nvlist
+ *
+ * Gets received properties (distinct from local properties on or after
+ * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
+ * local property values.
+ */
+static int
+zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
+{
+	objset_t *os = NULL;
+	int error;
+	nvlist_t *nv;
+
+	if (error = dmu_objset_hold(zc->zc_name, FTAG, &os))
+		return (error);
+
+	/*
+	 * Without this check, we would return local property values if the
+	 * caller has not already received properties on or after
+	 * SPA_VERSION_RECVD_PROPS.
+	 */
+	if (!dsl_prop_get_hasrecvd(os)) {
+		dmu_objset_rele(os, FTAG);
+		return (ENOTSUP);
+	}
+
+	if (zc->zc_nvlist_dst != 0 &&
+	    (error = dsl_prop_get_received(os, &nv)) == 0) {
+		error = put_nvlist(zc, nv);
+		nvlist_free(nv);
+	}
+
+	dmu_objset_rele(os, FTAG);
+	return (error);
+}
+
+static int
+nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
+{
+	uint64_t value;
+	int error;
+
+	/*
+	 * zfs_get_zplprop() will either find a value or give us
+	 * the default value (if there is one).
+	 */
+	if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
+		return (error);
+	VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
+	return (0);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_nvlist_dst_size	size of buffer for zpl property nvlist
+ *
+ * outputs:
+ * zc_nvlist_dst	zpl property nvlist
+ * zc_nvlist_dst_size	size of zpl property nvlist
+ */
+static int
+zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
+{
+	objset_t *os;
+	int err;
+
+	/* XXX reading without owning */
+	if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
+		return (err);
+
+	dmu_objset_fast_stat(os, &zc->zc_objset_stats);
+
+	/*
+	 * NB: nvl_add_zplprop() will read the objset contents,
+	 * which we aren't supposed to do with a DS_MODE_USER
+	 * hold, because it could be inconsistent.
+	 */
+	if (zc->zc_nvlist_dst != NULL &&
+	    !zc->zc_objset_stats.dds_inconsistent &&
+	    dmu_objset_type(os) == DMU_OST_ZFS) {
+		nvlist_t *nv;
+
+		VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
+		    (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
+		    (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
+		    (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
+			err = put_nvlist(zc, nv);
+		nvlist_free(nv);
+	} else {
+		err = ENOENT;
+	}
+	dmu_objset_rele(os, FTAG);
+	return (err);
+}
+
+static boolean_t
+dataset_name_hidden(const char *name)
+{
+	/*
+	 * Skip over datasets that are not visible in this zone,
+	 * internal datasets (which have a $ in their name), and
+	 * temporary datasets (which have a % in their name).
+	 */
+	if (strchr(name, '$') != NULL)
+		return (B_TRUE);
+	if (strchr(name, '%') != NULL)
+		return (B_TRUE);
+	if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
+		return (B_TRUE);
+	return (B_FALSE);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_cookie		zap cursor
+ * zc_nvlist_dst_size	size of buffer for property nvlist
+ *
+ * outputs:
+ * zc_name		name of next filesystem
+ * zc_cookie		zap cursor
+ * zc_objset_stats	stats
+ * zc_nvlist_dst	property nvlist
+ * zc_nvlist_dst_size	size of property nvlist
+ */
+static int
+zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
+{
+	objset_t *os;
+	int error;
+	char *p;
+	size_t orig_len = strlen(zc->zc_name);
+
+top:
+	if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
+		if (error == ENOENT)
+			error = ESRCH;
+		return (error);
+	}
+
+	p = strrchr(zc->zc_name, '/');
+	if (p == NULL || p[1] != '\0')
+		(void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
+	p = zc->zc_name + strlen(zc->zc_name);
+
+	/*
+	 * Pre-fetch the datasets.  dmu_objset_prefetch() always returns 0
+	 * but is not declared void because its called by dmu_objset_find().
+	 */
+	if (zc->zc_cookie == 0) {
+		uint64_t cookie = 0;
+		int len = sizeof (zc->zc_name) - (p - zc->zc_name);
+
+		while (dmu_dir_list_next(os, len, p, NULL, &cookie) == 0)
+			(void) dmu_objset_prefetch(p, NULL);
+	}
+
+	do {
+		error = dmu_dir_list_next(os,
+		    sizeof (zc->zc_name) - (p - zc->zc_name), p,
+		    NULL, &zc->zc_cookie);
+		if (error == ENOENT)
+			error = ESRCH;
+	} while (error == 0 && dataset_name_hidden(zc->zc_name) &&
+	    !(zc->zc_iflags & FKIOCTL));
+	dmu_objset_rele(os, FTAG);
+
+	/*
+	 * If it's an internal dataset (ie. with a '$' in its name),
+	 * don't try to get stats for it, otherwise we'll return ENOENT.
+	 */
+	if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
+		error = zfs_ioc_objset_stats(zc); /* fill in the stats */
+		if (error == ENOENT) {
+			/* We lost a race with destroy, get the next one. */
+			zc->zc_name[orig_len] = '\0';
+			goto top;
+		}
+	}
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_cookie		zap cursor
+ * zc_nvlist_dst_size	size of buffer for property nvlist
+ *
+ * outputs:
+ * zc_name		name of next snapshot
+ * zc_objset_stats	stats
+ * zc_nvlist_dst	property nvlist
+ * zc_nvlist_dst_size	size of property nvlist
+ */
+static int
+zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
+{
+	objset_t *os;
+	int error;
+
+top:
+	if (zc->zc_cookie == 0)
+		(void) dmu_objset_find(zc->zc_name, dmu_objset_prefetch,
+		    NULL, DS_FIND_SNAPSHOTS);
+
+	error = dmu_objset_hold(zc->zc_name, FTAG, &os);
+	if (error)
+		return (error == ENOENT ? ESRCH : error);
+
+	/*
+	 * A dataset name of maximum length cannot have any snapshots,
+	 * so exit immediately.
+	 */
+	if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
+		dmu_objset_rele(os, FTAG);
+		return (ESRCH);
+	}
+
+	error = dmu_snapshot_list_next(os,
+	    sizeof (zc->zc_name) - strlen(zc->zc_name),
+	    zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
+	    NULL);
+
+	if (error == 0) {
+		dsl_dataset_t *ds;
+		dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
+
+		/*
+		 * Since we probably don't have a hold on this snapshot,
+		 * it's possible that the objsetid could have been destroyed
+		 * and reused for a new objset. It's OK if this happens during
+		 * a zfs send operation, since the new createtxg will be
+		 * beyond the range we're interested in.
+		 */
+		rw_enter(&dp->dp_config_rwlock, RW_READER);
+		error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
+		rw_exit(&dp->dp_config_rwlock);
+		if (error) {
+			if (error == ENOENT) {
+				/* Racing with destroy, get the next one. */
+				*strchr(zc->zc_name, '@') = '\0';
+				dmu_objset_rele(os, FTAG);
+				goto top;
+			}
+		} else {
+			objset_t *ossnap;
+
+			error = dmu_objset_from_ds(ds, &ossnap);
+			if (error == 0)
+				error = zfs_ioc_objset_stats_impl(zc, ossnap);
+			dsl_dataset_rele(ds, FTAG);
+		}
+	} else if (error == ENOENT) {
+		error = ESRCH;
+	}
+
+	dmu_objset_rele(os, FTAG);
+	/* if we failed, undo the @ that we tacked on to zc_name */
+	if (error)
+		*strchr(zc->zc_name, '@') = '\0';
+	return (error);
+}
+
+static int
+zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
+{
+	const char *propname = nvpair_name(pair);
+	uint64_t *valary;
+	unsigned int vallen;
+	const char *domain;
+	char *dash;
+	zfs_userquota_prop_t type;
+	uint64_t rid;
+	uint64_t quota;
+	zfsvfs_t *zfsvfs;
+	int err;
+
+	if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
+		nvlist_t *attrs;
+		VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
+		if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+		    &pair) != 0)
+			return (EINVAL);
+	}
+
+	/*
+	 * A correctly constructed propname is encoded as
+	 * userquota@<rid>-<domain>.
+	 */
+	if ((dash = strchr(propname, '-')) == NULL ||
+	    nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
+	    vallen != 3)
+		return (EINVAL);
+
+	domain = dash + 1;
+	type = valary[0];
+	rid = valary[1];
+	quota = valary[2];
+
+	err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
+	if (err == 0) {
+		err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
+		zfsvfs_rele(zfsvfs, FTAG);
+	}
+
+	return (err);
+}
+
+/*
+ * If the named property is one that has a special function to set its value,
+ * return 0 on success and a positive error code on failure; otherwise if it is
+ * not one of the special properties handled by this function, return -1.
+ *
+ * XXX: It would be better for callers of the property interface if we handled
+ * these special cases in dsl_prop.c (in the dsl layer).
+ */
+static int
+zfs_prop_set_special(const char *dsname, zprop_source_t source,
+    nvpair_t *pair)
+{
+	const char *propname = nvpair_name(pair);
+	zfs_prop_t prop = zfs_name_to_prop(propname);
+	uint64_t intval;
+	int err;
+
+	if (prop == ZPROP_INVAL) {
+		if (zfs_prop_userquota(propname))
+			return (zfs_prop_set_userquota(dsname, pair));
+		return (-1);
+	}
+
+	if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
+		nvlist_t *attrs;
+		VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
+		VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+		    &pair) == 0);
+	}
+
+	if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
+		return (-1);
+
+	VERIFY(0 == nvpair_value_uint64(pair, &intval));
+
+	switch (prop) {
+	case ZFS_PROP_QUOTA:
+		err = dsl_dir_set_quota(dsname, source, intval);
+		break;
+	case ZFS_PROP_REFQUOTA:
+		err = dsl_dataset_set_quota(dsname, source, intval);
+		break;
+	case ZFS_PROP_RESERVATION:
+		err = dsl_dir_set_reservation(dsname, source, intval);
+		break;
+	case ZFS_PROP_REFRESERVATION:
+		err = dsl_dataset_set_reservation(dsname, source, intval);
+		break;
+	case ZFS_PROP_VOLSIZE:
+		err = zvol_set_volsize(dsname, ddi_driver_major(zfs_dip),
+		    intval);
+		break;
+	case ZFS_PROP_VERSION:
+	{
+		zfsvfs_t *zfsvfs;
+
+		if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
+			break;
+
+		err = zfs_set_version(zfsvfs, intval);
+		zfsvfs_rele(zfsvfs, FTAG);
+
+		if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
+			zfs_cmd_t *zc;
+
+			zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
+			(void) strcpy(zc->zc_name, dsname);
+			(void) zfs_ioc_userspace_upgrade(zc);
+			kmem_free(zc, sizeof (zfs_cmd_t));
+		}
+		break;
+	}
+
+	default:
+		err = -1;
+	}
+
+	return (err);
+}
+
+/*
+ * This function is best effort. If it fails to set any of the given properties,
+ * it continues to set as many as it can and returns the first error
+ * encountered. If the caller provides a non-NULL errlist, it also gives the
+ * complete list of names of all the properties it failed to set along with the
+ * corresponding error numbers. The caller is responsible for freeing the
+ * returned errlist.
+ *
+ * If every property is set successfully, zero is returned and the list pointed
+ * at by errlist is NULL.
+ */
+int
+zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
+    nvlist_t **errlist)
+{
+	nvpair_t *pair;
+	nvpair_t *propval;
+	int rv = 0;
+	uint64_t intval;
+	char *strval;
+	nvlist_t *genericnvl;
+	nvlist_t *errors;
+	nvlist_t *retrynvl;
+
+	VERIFY(nvlist_alloc(&genericnvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	VERIFY(nvlist_alloc(&retrynvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+retry:
+	pair = NULL;
+	while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
+		const char *propname = nvpair_name(pair);
+		zfs_prop_t prop = zfs_name_to_prop(propname);
+		int err = 0;
+
+		/* decode the property value */
+		propval = pair;
+		if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
+			nvlist_t *attrs;
+			VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
+			if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+			    &propval) != 0)
+				err = EINVAL;
+		}
+
+		/* Validate value type */
+		if (err == 0 && prop == ZPROP_INVAL) {
+			if (zfs_prop_user(propname)) {
+				if (nvpair_type(propval) != DATA_TYPE_STRING)
+					err = EINVAL;
+			} else if (zfs_prop_userquota(propname)) {
+				if (nvpair_type(propval) !=
+				    DATA_TYPE_UINT64_ARRAY)
+					err = EINVAL;
+			}
+		} else if (err == 0) {
+			if (nvpair_type(propval) == DATA_TYPE_STRING) {
+				if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
+					err = EINVAL;
+			} else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
+				const char *unused;
+
+				VERIFY(nvpair_value_uint64(propval,
+				    &intval) == 0);
+
+				switch (zfs_prop_get_type(prop)) {
+				case PROP_TYPE_NUMBER:
+					break;
+				case PROP_TYPE_STRING:
+					err = EINVAL;
+					break;
+				case PROP_TYPE_INDEX:
+					if (zfs_prop_index_to_string(prop,
+					    intval, &unused) != 0)
+						err = EINVAL;
+					break;
+				default:
+					cmn_err(CE_PANIC,
+					    "unknown property type");
+				}
+			} else {
+				err = EINVAL;
+			}
+		}
+
+		/* Validate permissions */
+		if (err == 0)
+			err = zfs_check_settable(dsname, pair, CRED());
+
+		if (err == 0) {
+			err = zfs_prop_set_special(dsname, source, pair);
+			if (err == -1) {
+				/*
+				 * For better performance we build up a list of
+				 * properties to set in a single transaction.
+				 */
+				err = nvlist_add_nvpair(genericnvl, pair);
+			} else if (err != 0 && nvl != retrynvl) {
+				/*
+				 * This may be a spurious error caused by
+				 * receiving quota and reservation out of order.
+				 * Try again in a second pass.
+				 */
+				err = nvlist_add_nvpair(retrynvl, pair);
+			}
+		}
+
+		if (err != 0)
+			VERIFY(nvlist_add_int32(errors, propname, err) == 0);
+	}
+
+	if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
+		nvl = retrynvl;
+		goto retry;
+	}
+
+	if (!nvlist_empty(genericnvl) &&
+	    dsl_props_set(dsname, source, genericnvl) != 0) {
+		/*
+		 * If this fails, we still want to set as many properties as we
+		 * can, so try setting them individually.
+		 */
+		pair = NULL;
+		while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
+			const char *propname = nvpair_name(pair);
+			int err = 0;
+
+			propval = pair;
+			if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
+				nvlist_t *attrs;
+				VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
+				VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+				    &propval) == 0);
+			}
+
+			if (nvpair_type(propval) == DATA_TYPE_STRING) {
+				VERIFY(nvpair_value_string(propval,
+				    &strval) == 0);
+				err = dsl_prop_set(dsname, propname, source, 1,
+				    strlen(strval) + 1, strval);
+			} else {
+				VERIFY(nvpair_value_uint64(propval,
+				    &intval) == 0);
+				err = dsl_prop_set(dsname, propname, source, 8,
+				    1, &intval);
+			}
+
+			if (err != 0) {
+				VERIFY(nvlist_add_int32(errors, propname,
+				    err) == 0);
+			}
+		}
+	}
+	nvlist_free(genericnvl);
+	nvlist_free(retrynvl);
+
+	if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
+		nvlist_free(errors);
+		errors = NULL;
+	} else {
+		VERIFY(nvpair_value_int32(pair, &rv) == 0);
+	}
+
+	if (errlist == NULL)
+		nvlist_free(errors);
+	else
+		*errlist = errors;
+
+	return (rv);
+}
+
+/*
+ * Check that all the properties are valid user properties.
+ */
+static int
+zfs_check_userprops(char *fsname, nvlist_t *nvl)
+{
+	nvpair_t *pair = NULL;
+	int error = 0;
+
+	while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
+		const char *propname = nvpair_name(pair);
+		char *valstr;
+
+		if (!zfs_prop_user(propname) ||
+		    nvpair_type(pair) != DATA_TYPE_STRING)
+			return (EINVAL);
+
+		if (error = zfs_secpolicy_write_perms(fsname,
+		    ZFS_DELEG_PERM_USERPROP, CRED()))
+			return (error);
+
+		if (strlen(propname) >= ZAP_MAXNAMELEN)
+			return (ENAMETOOLONG);
+
+		VERIFY(nvpair_value_string(pair, &valstr) == 0);
+		if (strlen(valstr) >= ZAP_MAXVALUELEN)
+			return (E2BIG);
+	}
+	return (0);
+}
+
+static void
+props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
+{
+	nvpair_t *pair;
+
+	VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	pair = NULL;
+	while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
+		if (nvlist_exists(skipped, nvpair_name(pair)))
+			continue;
+
+		VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
+	}
+}
+
+static int
+clear_received_props(objset_t *os, const char *fs, nvlist_t *props,
+    nvlist_t *skipped)
+{
+	int err = 0;
+	nvlist_t *cleared_props = NULL;
+	props_skip(props, skipped, &cleared_props);
+	if (!nvlist_empty(cleared_props)) {
+		/*
+		 * Acts on local properties until the dataset has received
+		 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
+		 */
+		zprop_source_t flags = (ZPROP_SRC_NONE |
+		    (dsl_prop_get_hasrecvd(os) ? ZPROP_SRC_RECEIVED : 0));
+		err = zfs_set_prop_nvlist(fs, flags, cleared_props, NULL);
+	}
+	nvlist_free(cleared_props);
+	return (err);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_value		name of property to set
+ * zc_nvlist_src{_size}	nvlist of properties to apply
+ * zc_cookie		received properties flag
+ *
+ * outputs:
+ * zc_nvlist_dst{_size} error for each unapplied received property
+ */
+static int
+zfs_ioc_set_prop(zfs_cmd_t *zc)
+{
+	nvlist_t *nvl;
+	boolean_t received = zc->zc_cookie;
+	zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
+	    ZPROP_SRC_LOCAL);
+	nvlist_t *errors = NULL;
+	int error;
+
+	if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &nvl)) != 0)
+		return (error);
+
+	if (received) {
+		nvlist_t *origprops;
+		objset_t *os;
+
+		if (dmu_objset_hold(zc->zc_name, FTAG, &os) == 0) {
+			if (dsl_prop_get_received(os, &origprops) == 0) {
+				(void) clear_received_props(os,
+				    zc->zc_name, origprops, nvl);
+				nvlist_free(origprops);
+			}
+
+			dsl_prop_set_hasrecvd(os);
+			dmu_objset_rele(os, FTAG);
+		}
+	}
+
+	error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, &errors);
+
+	if (zc->zc_nvlist_dst != NULL && errors != NULL) {
+		(void) put_nvlist(zc, errors);
+	}
+
+	nvlist_free(errors);
+	nvlist_free(nvl);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_value		name of property to inherit
+ * zc_cookie		revert to received value if TRUE
+ *
+ * outputs:		none
+ */
+static int
+zfs_ioc_inherit_prop(zfs_cmd_t *zc)
+{
+	const char *propname = zc->zc_value;
+	zfs_prop_t prop = zfs_name_to_prop(propname);
+	boolean_t received = zc->zc_cookie;
+	zprop_source_t source = (received
+	    ? ZPROP_SRC_NONE		/* revert to received value, if any */
+	    : ZPROP_SRC_INHERITED);	/* explicitly inherit */
+
+	if (received) {
+		nvlist_t *dummy;
+		nvpair_t *pair;
+		zprop_type_t type;
+		int err;
+
+		/*
+		 * zfs_prop_set_special() expects properties in the form of an
+		 * nvpair with type info.
+		 */
+		if (prop == ZPROP_INVAL) {
+			if (!zfs_prop_user(propname))
+				return (EINVAL);
+
+			type = PROP_TYPE_STRING;
+		} else if (prop == ZFS_PROP_VOLSIZE ||
+		    prop == ZFS_PROP_VERSION) {
+			return (EINVAL);
+		} else {
+			type = zfs_prop_get_type(prop);
+		}
+
+		VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+		switch (type) {
+		case PROP_TYPE_STRING:
+			VERIFY(0 == nvlist_add_string(dummy, propname, ""));
+			break;
+		case PROP_TYPE_NUMBER:
+		case PROP_TYPE_INDEX:
+			VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
+			break;
+		default:
+			nvlist_free(dummy);
+			return (EINVAL);
+		}
+
+		pair = nvlist_next_nvpair(dummy, NULL);
+		err = zfs_prop_set_special(zc->zc_name, source, pair);
+		nvlist_free(dummy);
+		if (err != -1)
+			return (err); /* special property already handled */
+	} else {
+		/*
+		 * Only check this in the non-received case. We want to allow
+		 * 'inherit -S' to revert non-inheritable properties like quota
+		 * and reservation to the received or default values even though
+		 * they are not considered inheritable.
+		 */
+		if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
+			return (EINVAL);
+	}
+
+	/* the property name has been validated by zfs_secpolicy_inherit() */
+	return (dsl_prop_set(zc->zc_name, zc->zc_value, source, 0, 0, NULL));
+}
+
+static int
+zfs_ioc_pool_set_props(zfs_cmd_t *zc)
+{
+	nvlist_t *props;
+	spa_t *spa;
+	int error;
+	nvpair_t *pair;
+
+	if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &props))
+		return (error);
+
+	/*
+	 * If the only property is the configfile, then just do a spa_lookup()
+	 * to handle the faulted case.
+	 */
+	pair = nvlist_next_nvpair(props, NULL);
+	if (pair != NULL && strcmp(nvpair_name(pair),
+	    zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
+	    nvlist_next_nvpair(props, pair) == NULL) {
+		mutex_enter(&spa_namespace_lock);
+		if ((spa = spa_lookup(zc->zc_name)) != NULL) {
+			spa_configfile_set(spa, props, B_FALSE);
+			spa_config_sync(spa, B_FALSE, B_TRUE);
+		}
+		mutex_exit(&spa_namespace_lock);
+		if (spa != NULL) {
+			nvlist_free(props);
+			return (0);
+		}
+	}
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
+		nvlist_free(props);
+		return (error);
+	}
+
+	error = spa_prop_set(spa, props);
+
+	nvlist_free(props);
+	spa_close(spa, FTAG);
+
+	return (error);
+}
+
+static int
+zfs_ioc_pool_get_props(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+	nvlist_t *nvp = NULL;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
+		/*
+		 * If the pool is faulted, there may be properties we can still
+		 * get (such as altroot and cachefile), so attempt to get them
+		 * anyway.
+		 */
+		mutex_enter(&spa_namespace_lock);
+		if ((spa = spa_lookup(zc->zc_name)) != NULL)
+			error = spa_prop_get(spa, &nvp);
+		mutex_exit(&spa_namespace_lock);
+	} else {
+		error = spa_prop_get(spa, &nvp);
+		spa_close(spa, FTAG);
+	}
+
+	if (error == 0 && zc->zc_nvlist_dst != NULL)
+		error = put_nvlist(zc, nvp);
+	else
+		error = EFAULT;
+
+	nvlist_free(nvp);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_nvlist_src{_size}	nvlist of delegated permissions
+ * zc_perm_action	allow/unallow flag
+ *
+ * outputs:		none
+ */
+static int
+zfs_ioc_set_fsacl(zfs_cmd_t *zc)
+{
+	int error;
+	nvlist_t *fsaclnv = NULL;
+
+	if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &fsaclnv)) != 0)
+		return (error);
+
+	/*
+	 * Verify nvlist is constructed correctly
+	 */
+	if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
+		nvlist_free(fsaclnv);
+		return (EINVAL);
+	}
+
+	/*
+	 * If we don't have PRIV_SYS_MOUNT, then validate
+	 * that user is allowed to hand out each permission in
+	 * the nvlist(s)
+	 */
+
+	error = secpolicy_zfs(CRED());
+	if (error) {
+		if (zc->zc_perm_action == B_FALSE) {
+			error = dsl_deleg_can_allow(zc->zc_name,
+			    fsaclnv, CRED());
+		} else {
+			error = dsl_deleg_can_unallow(zc->zc_name,
+			    fsaclnv, CRED());
+		}
+	}
+
+	if (error == 0)
+		error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
+
+	nvlist_free(fsaclnv);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ *
+ * outputs:
+ * zc_nvlist_src{_size}	nvlist of delegated permissions
+ */
+static int
+zfs_ioc_get_fsacl(zfs_cmd_t *zc)
+{
+	nvlist_t *nvp;
+	int error;
+
+	if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
+		error = put_nvlist(zc, nvp);
+		nvlist_free(nvp);
+	}
+
+	return (error);
+}
+
+/*
+ * Search the vfs list for a specified resource.  Returns a pointer to it
+ * or NULL if no suitable entry is found. The caller of this routine
+ * is responsible for releasing the returned vfs pointer.
+ */
+static vfs_t *
+zfs_get_vfs(const char *resource)
+{
+	struct vfs *vfsp;
+	struct vfs *vfs_found = NULL;
+
+	vfs_list_read_lock();
+	vfsp = rootvfs;
+	do {
+		if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
+			VFS_HOLD(vfsp);
+			vfs_found = vfsp;
+			break;
+		}
+		vfsp = vfsp->vfs_next;
+	} while (vfsp != rootvfs);
+	vfs_list_unlock();
+	return (vfs_found);
+}
+
+/* ARGSUSED */
+static void
+zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
+{
+	zfs_creat_t *zct = arg;
+
+	zfs_create_fs(os, cr, zct->zct_zplprops, tx);
+}
+
+#define	ZFS_PROP_UNDEFINED	((uint64_t)-1)
+
+/*
+ * inputs:
+ * createprops		list of properties requested by creator
+ * default_zplver	zpl version to use if unspecified in createprops
+ * fuids_ok		fuids allowed in this version of the spa?
+ * os			parent objset pointer (NULL if root fs)
+ *
+ * outputs:
+ * zplprops	values for the zplprops we attach to the master node object
+ * is_ci	true if requested file system will be purely case-insensitive
+ *
+ * Determine the settings for utf8only, normalization and
+ * casesensitivity.  Specific values may have been requested by the
+ * creator and/or we can inherit values from the parent dataset.  If
+ * the file system is of too early a vintage, a creator can not
+ * request settings for these properties, even if the requested
+ * setting is the default value.  We don't actually want to create dsl
+ * properties for these, so remove them from the source nvlist after
+ * processing.
+ */
+static int
+zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
+    boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
+    nvlist_t *zplprops, boolean_t *is_ci)
+{
+	uint64_t sense = ZFS_PROP_UNDEFINED;
+	uint64_t norm = ZFS_PROP_UNDEFINED;
+	uint64_t u8 = ZFS_PROP_UNDEFINED;
+
+	ASSERT(zplprops != NULL);
+
+	/*
+	 * Pull out creator prop choices, if any.
+	 */
+	if (createprops) {
+		(void) nvlist_lookup_uint64(createprops,
+		    zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
+		(void) nvlist_lookup_uint64(createprops,
+		    zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
+		(void) nvlist_remove_all(createprops,
+		    zfs_prop_to_name(ZFS_PROP_NORMALIZE));
+		(void) nvlist_lookup_uint64(createprops,
+		    zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
+		(void) nvlist_remove_all(createprops,
+		    zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
+		(void) nvlist_lookup_uint64(createprops,
+		    zfs_prop_to_name(ZFS_PROP_CASE), &sense);
+		(void) nvlist_remove_all(createprops,
+		    zfs_prop_to_name(ZFS_PROP_CASE));
+	}
+
+	/*
+	 * If the zpl version requested is whacky or the file system
+	 * or pool is version is too "young" to support normalization
+	 * and the creator tried to set a value for one of the props,
+	 * error out.
+	 */
+	if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
+	    (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
+	    (zplver >= ZPL_VERSION_SA && !sa_ok) ||
+	    (zplver < ZPL_VERSION_NORMALIZATION &&
+	    (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
+	    sense != ZFS_PROP_UNDEFINED)))
+		return (ENOTSUP);
+
+	/*
+	 * Put the version in the zplprops
+	 */
+	VERIFY(nvlist_add_uint64(zplprops,
+	    zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
+
+	if (norm == ZFS_PROP_UNDEFINED)
+		VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
+	VERIFY(nvlist_add_uint64(zplprops,
+	    zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
+
+	/*
+	 * If we're normalizing, names must always be valid UTF-8 strings.
+	 */
+	if (norm)
+		u8 = 1;
+	if (u8 == ZFS_PROP_UNDEFINED)
+		VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
+	VERIFY(nvlist_add_uint64(zplprops,
+	    zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
+
+	if (sense == ZFS_PROP_UNDEFINED)
+		VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
+	VERIFY(nvlist_add_uint64(zplprops,
+	    zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
+
+	if (is_ci)
+		*is_ci = (sense == ZFS_CASE_INSENSITIVE);
+
+	return (0);
+}
+
+static int
+zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
+    nvlist_t *zplprops, boolean_t *is_ci)
+{
+	boolean_t fuids_ok, sa_ok;
+	uint64_t zplver = ZPL_VERSION;
+	objset_t *os = NULL;
+	char parentname[MAXNAMELEN];
+	char *cp;
+	spa_t *spa;
+	uint64_t spa_vers;
+	int error;
+
+	(void) strlcpy(parentname, dataset, sizeof (parentname));
+	cp = strrchr(parentname, '/');
+	ASSERT(cp != NULL);
+	cp[0] = '\0';
+
+	if ((error = spa_open(dataset, &spa, FTAG)) != 0)
+		return (error);
+
+	spa_vers = spa_version(spa);
+	spa_close(spa, FTAG);
+
+	zplver = zfs_zpl_version_map(spa_vers);
+	fuids_ok = (zplver >= ZPL_VERSION_FUID);
+	sa_ok = (zplver >= ZPL_VERSION_SA);
+
+	/*
+	 * Open parent object set so we can inherit zplprop values.
+	 */
+	if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
+		return (error);
+
+	error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
+	    zplprops, is_ci);
+	dmu_objset_rele(os, FTAG);
+	return (error);
+}
+
+static int
+zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
+    nvlist_t *zplprops, boolean_t *is_ci)
+{
+	boolean_t fuids_ok;
+	boolean_t sa_ok;
+	uint64_t zplver = ZPL_VERSION;
+	int error;
+
+	zplver = zfs_zpl_version_map(spa_vers);
+	fuids_ok = (zplver >= ZPL_VERSION_FUID);
+	sa_ok = (zplver >= ZPL_VERSION_SA);
+
+	error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
+	    createprops, zplprops, is_ci);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_objset_type	type of objset to create (fs vs zvol)
+ * zc_name		name of new objset
+ * zc_value		name of snapshot to clone from (may be empty)
+ * zc_nvlist_src{_size}	nvlist of properties to apply
+ *
+ * outputs: none
+ */
+static int
+zfs_ioc_create(zfs_cmd_t *zc)
+{
+	objset_t *clone;
+	int error = 0;
+	zfs_creat_t zct;
+	nvlist_t *nvprops = NULL;
+	void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
+	dmu_objset_type_t type = zc->zc_objset_type;
+
+	switch (type) {
+
+	case DMU_OST_ZFS:
+		cbfunc = zfs_create_cb;
+		break;
+
+	case DMU_OST_ZVOL:
+		cbfunc = zvol_create_cb;
+		break;
+
+	default:
+		cbfunc = NULL;
+		break;
+	}
+	if (strchr(zc->zc_name, '@') ||
+	    strchr(zc->zc_name, '%'))
+		return (EINVAL);
+
+	if (zc->zc_nvlist_src != NULL &&
+	    (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &nvprops)) != 0)
+		return (error);
+
+	zct.zct_zplprops = NULL;
+	zct.zct_props = nvprops;
+
+	if (zc->zc_value[0] != '\0') {
+		/*
+		 * We're creating a clone of an existing snapshot.
+		 */
+		zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
+		if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) {
+			nvlist_free(nvprops);
+			return (EINVAL);
+		}
+
+		error = dmu_objset_hold(zc->zc_value, FTAG, &clone);
+		if (error) {
+			nvlist_free(nvprops);
+			return (error);
+		}
+
+		error = dmu_objset_clone(zc->zc_name, dmu_objset_ds(clone), 0);
+		dmu_objset_rele(clone, FTAG);
+		if (error) {
+			nvlist_free(nvprops);
+			return (error);
+		}
+	} else {
+		boolean_t is_insensitive = B_FALSE;
+
+		if (cbfunc == NULL) {
+			nvlist_free(nvprops);
+			return (EINVAL);
+		}
+
+		if (type == DMU_OST_ZVOL) {
+			uint64_t volsize, volblocksize;
+
+			if (nvprops == NULL ||
+			    nvlist_lookup_uint64(nvprops,
+			    zfs_prop_to_name(ZFS_PROP_VOLSIZE),
+			    &volsize) != 0) {
+				nvlist_free(nvprops);
+				return (EINVAL);
+			}
+
+			if ((error = nvlist_lookup_uint64(nvprops,
+			    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
+			    &volblocksize)) != 0 && error != ENOENT) {
+				nvlist_free(nvprops);
+				return (EINVAL);
+			}
+
+			if (error != 0)
+				volblocksize = zfs_prop_default_numeric(
+				    ZFS_PROP_VOLBLOCKSIZE);
+
+			if ((error = zvol_check_volblocksize(
+			    volblocksize)) != 0 ||
+			    (error = zvol_check_volsize(volsize,
+			    volblocksize)) != 0) {
+				nvlist_free(nvprops);
+				return (error);
+			}
+		} else if (type == DMU_OST_ZFS) {
+			int error;
+
+			/*
+			 * We have to have normalization and
+			 * case-folding flags correct when we do the
+			 * file system creation, so go figure them out
+			 * now.
+			 */
+			VERIFY(nvlist_alloc(&zct.zct_zplprops,
+			    NV_UNIQUE_NAME, KM_SLEEP) == 0);
+			error = zfs_fill_zplprops(zc->zc_name, nvprops,
+			    zct.zct_zplprops, &is_insensitive);
+			if (error != 0) {
+				nvlist_free(nvprops);
+				nvlist_free(zct.zct_zplprops);
+				return (error);
+			}
+		}
+		error = dmu_objset_create(zc->zc_name, type,
+		    is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
+		nvlist_free(zct.zct_zplprops);
+	}
+
+	/*
+	 * It would be nice to do this atomically.
+	 */
+	if (error == 0) {
+		error = zfs_set_prop_nvlist(zc->zc_name, ZPROP_SRC_LOCAL,
+		    nvprops, NULL);
+		if (error != 0)
+			(void) dmu_objset_destroy(zc->zc_name, B_FALSE);
+	}
+	nvlist_free(nvprops);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name	name of filesystem
+ * zc_value	short name of snapshot
+ * zc_cookie	recursive flag
+ * zc_nvlist_src[_size] property list
+ *
+ * outputs:
+ * zc_value	short snapname (i.e. part after the '@')
+ */
+static int
+zfs_ioc_snapshot(zfs_cmd_t *zc)
+{
+	nvlist_t *nvprops = NULL;
+	int error;
+	boolean_t recursive = zc->zc_cookie;
+
+	if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
+		return (EINVAL);
+
+	if (zc->zc_nvlist_src != NULL &&
+	    (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &nvprops)) != 0)
+		return (error);
+
+	error = zfs_check_userprops(zc->zc_name, nvprops);
+	if (error)
+		goto out;
+
+	if (!nvlist_empty(nvprops) &&
+	    zfs_earlier_version(zc->zc_name, SPA_VERSION_SNAP_PROPS)) {
+		error = ENOTSUP;
+		goto out;
+	}
+
+	error = dmu_objset_snapshot(zc->zc_name, zc->zc_value, NULL,
+	    nvprops, recursive, B_FALSE, -1);
+
+out:
+	nvlist_free(nvprops);
+	return (error);
+}
+
+int
+zfs_unmount_snap(const char *name, void *arg)
+{
+	vfs_t *vfsp = NULL;
+
+	if (arg) {
+		char *snapname = arg;
+		char *fullname = kmem_asprintf("%s@%s", name, snapname);
+		vfsp = zfs_get_vfs(fullname);
+		strfree(fullname);
+	} else if (strchr(name, '@')) {
+		vfsp = zfs_get_vfs(name);
+	}
+
+	if (vfsp) {
+		/*
+		 * Always force the unmount for snapshots.
+		 */
+		int flag = MS_FORCE;
+		int err;
+
+		if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) {
+			VFS_RELE(vfsp);
+			return (err);
+		}
+		VFS_RELE(vfsp);
+		if ((err = dounmount(vfsp, flag, kcred)) != 0)
+			return (err);
+	}
+	return (0);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_value		short name of snapshot
+ * zc_defer_destroy	mark for deferred destroy
+ *
+ * outputs:	none
+ */
+static int
+zfs_ioc_destroy_snaps(zfs_cmd_t *zc)
+{
+	int err;
+
+	if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
+		return (EINVAL);
+	err = dmu_objset_find(zc->zc_name,
+	    zfs_unmount_snap, zc->zc_value, DS_FIND_CHILDREN);
+	if (err)
+		return (err);
+	return (dmu_snapshots_destroy(zc->zc_name, zc->zc_value,
+	    zc->zc_defer_destroy));
+}
+
+/*
+ * inputs:
+ * zc_name		name of dataset to destroy
+ * zc_objset_type	type of objset
+ * zc_defer_destroy	mark for deferred destroy
+ *
+ * outputs:		none
+ */
+static int
+zfs_ioc_destroy(zfs_cmd_t *zc)
+{
+	int err;
+	if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) {
+		err = zfs_unmount_snap(zc->zc_name, NULL);
+		if (err)
+			return (err);
+	}
+
+	err = dmu_objset_destroy(zc->zc_name, zc->zc_defer_destroy);
+	if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
+		(void) zvol_remove_minor(zc->zc_name);
+	return (err);
+}
+
+/*
+ * inputs:
+ * zc_name	name of dataset to rollback (to most recent snapshot)
+ *
+ * outputs:	none
+ */
+static int
+zfs_ioc_rollback(zfs_cmd_t *zc)
+{
+	dsl_dataset_t *ds, *clone;
+	int error;
+	zfsvfs_t *zfsvfs;
+	char *clone_name;
+
+	error = dsl_dataset_hold(zc->zc_name, FTAG, &ds);
+	if (error)
+		return (error);
+
+	/* must not be a snapshot */
+	if (dsl_dataset_is_snapshot(ds)) {
+		dsl_dataset_rele(ds, FTAG);
+		return (EINVAL);
+	}
+
+	/* must have a most recent snapshot */
+	if (ds->ds_phys->ds_prev_snap_txg < TXG_INITIAL) {
+		dsl_dataset_rele(ds, FTAG);
+		return (EINVAL);
+	}
+
+	/*
+	 * Create clone of most recent snapshot.
+	 */
+	clone_name = kmem_asprintf("%s/%%rollback", zc->zc_name);
+	error = dmu_objset_clone(clone_name, ds->ds_prev, DS_FLAG_INCONSISTENT);
+	if (error)
+		goto out;
+
+	error = dsl_dataset_own(clone_name, B_TRUE, FTAG, &clone);
+	if (error)
+		goto out;
+
+	/*
+	 * Do clone swap.
+	 */
+	if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
+		error = zfs_suspend_fs(zfsvfs);
+		if (error == 0) {
+			int resume_err;
+
+			if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) {
+				error = dsl_dataset_clone_swap(clone, ds,
+				    B_TRUE);
+				dsl_dataset_disown(ds, FTAG);
+				ds = NULL;
+			} else {
+				error = EBUSY;
+			}
+			resume_err = zfs_resume_fs(zfsvfs, zc->zc_name);
+			error = error ? error : resume_err;
+		}
+		VFS_RELE(zfsvfs->z_vfs);
+	} else {
+		if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) {
+			error = dsl_dataset_clone_swap(clone, ds, B_TRUE);
+			dsl_dataset_disown(ds, FTAG);
+			ds = NULL;
+		} else {
+			error = EBUSY;
+		}
+	}
+
+	/*
+	 * Destroy clone (which also closes it).
+	 */
+	(void) dsl_dataset_destroy(clone, FTAG, B_FALSE);
+
+out:
+	strfree(clone_name);
+	if (ds)
+		dsl_dataset_rele(ds, FTAG);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name	old name of dataset
+ * zc_value	new name of dataset
+ * zc_cookie	recursive flag (only valid for snapshots)
+ *
+ * outputs:	none
+ */
+static int
+zfs_ioc_rename(zfs_cmd_t *zc)
+{
+	boolean_t recursive = zc->zc_cookie & 1;
+
+	zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
+	if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
+	    strchr(zc->zc_value, '%'))
+		return (EINVAL);
+
+	/*
+	 * Unmount snapshot unless we're doing a recursive rename,
+	 * in which case the dataset code figures out which snapshots
+	 * to unmount.
+	 */
+	if (!recursive && strchr(zc->zc_name, '@') != NULL &&
+	    zc->zc_objset_type == DMU_OST_ZFS) {
+		int err = zfs_unmount_snap(zc->zc_name, NULL);
+		if (err)
+			return (err);
+	}
+	if (zc->zc_objset_type == DMU_OST_ZVOL)
+		(void) zvol_remove_minor(zc->zc_name);
+	return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive));
+}
+
+static int
+zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
+{
+	const char *propname = nvpair_name(pair);
+	boolean_t issnap = (strchr(dsname, '@') != NULL);
+	zfs_prop_t prop = zfs_name_to_prop(propname);
+	uint64_t intval;
+	int err;
+
+	if (prop == ZPROP_INVAL) {
+		if (zfs_prop_user(propname)) {
+			if (err = zfs_secpolicy_write_perms(dsname,
+			    ZFS_DELEG_PERM_USERPROP, cr))
+				return (err);
+			return (0);
+		}
+
+		if (!issnap && zfs_prop_userquota(propname)) {
+			const char *perm = NULL;
+			const char *uq_prefix =
+			    zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
+			const char *gq_prefix =
+			    zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
+
+			if (strncmp(propname, uq_prefix,
+			    strlen(uq_prefix)) == 0) {
+				perm = ZFS_DELEG_PERM_USERQUOTA;
+			} else if (strncmp(propname, gq_prefix,
+			    strlen(gq_prefix)) == 0) {
+				perm = ZFS_DELEG_PERM_GROUPQUOTA;
+			} else {
+				/* USERUSED and GROUPUSED are read-only */
+				return (EINVAL);
+			}
+
+			if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
+				return (err);
+			return (0);
+		}
+
+		return (EINVAL);
+	}
+
+	if (issnap)
+		return (EINVAL);
+
+	if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
+		/*
+		 * dsl_prop_get_all_impl() returns properties in this
+		 * format.
+		 */
+		nvlist_t *attrs;
+		VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
+		VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+		    &pair) == 0);
+	}
+
+	/*
+	 * Check that this value is valid for this pool version
+	 */
+	switch (prop) {
+	case ZFS_PROP_COMPRESSION:
+		/*
+		 * If the user specified gzip compression, make sure
+		 * the SPA supports it. We ignore any errors here since
+		 * we'll catch them later.
+		 */
+		if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
+		    nvpair_value_uint64(pair, &intval) == 0) {
+			if (intval >= ZIO_COMPRESS_GZIP_1 &&
+			    intval <= ZIO_COMPRESS_GZIP_9 &&
+			    zfs_earlier_version(dsname,
+			    SPA_VERSION_GZIP_COMPRESSION)) {
+				return (ENOTSUP);
+			}
+
+			if (intval == ZIO_COMPRESS_ZLE &&
+			    zfs_earlier_version(dsname,
+			    SPA_VERSION_ZLE_COMPRESSION))
+				return (ENOTSUP);
+
+			/*
+			 * If this is a bootable dataset then
+			 * verify that the compression algorithm
+			 * is supported for booting. We must return
+			 * something other than ENOTSUP since it
+			 * implies a downrev pool version.
+			 */
+			if (zfs_is_bootfs(dsname) &&
+			    !BOOTFS_COMPRESS_VALID(intval)) {
+				return (ERANGE);
+			}
+		}
+		break;
+
+	case ZFS_PROP_COPIES:
+		if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
+			return (ENOTSUP);
+		break;
+
+	case ZFS_PROP_DEDUP:
+		if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
+			return (ENOTSUP);
+		break;
+
+	case ZFS_PROP_SHARESMB:
+		if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
+			return (ENOTSUP);
+		break;
+
+	case ZFS_PROP_ACLINHERIT:
+		if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
+		    nvpair_value_uint64(pair, &intval) == 0) {
+			if (intval == ZFS_ACL_PASSTHROUGH_X &&
+			    zfs_earlier_version(dsname,
+			    SPA_VERSION_PASSTHROUGH_X))
+				return (ENOTSUP);
+		}
+		break;
+	}
+
+	return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
+}
+
+/*
+ * Removes properties from the given props list that fail permission checks
+ * needed to clear them and to restore them in case of a receive error. For each
+ * property, make sure we have both set and inherit permissions.
+ *
+ * Returns the first error encountered if any permission checks fail. If the
+ * caller provides a non-NULL errlist, it also gives the complete list of names
+ * of all the properties that failed a permission check along with the
+ * corresponding error numbers. The caller is responsible for freeing the
+ * returned errlist.
+ *
+ * If every property checks out successfully, zero is returned and the list
+ * pointed at by errlist is NULL.
+ */
+static int
+zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
+{
+	zfs_cmd_t *zc;
+	nvpair_t *pair, *next_pair;
+	nvlist_t *errors;
+	int err, rv = 0;
+
+	if (props == NULL)
+		return (0);
+
+	VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
+	(void) strcpy(zc->zc_name, dataset);
+	pair = nvlist_next_nvpair(props, NULL);
+	while (pair != NULL) {
+		next_pair = nvlist_next_nvpair(props, pair);
+
+		(void) strcpy(zc->zc_value, nvpair_name(pair));
+		if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
+		    (err = zfs_secpolicy_inherit(zc, CRED())) != 0) {
+			VERIFY(nvlist_remove_nvpair(props, pair) == 0);
+			VERIFY(nvlist_add_int32(errors,
+			    zc->zc_value, err) == 0);
+		}
+		pair = next_pair;
+	}
+	kmem_free(zc, sizeof (zfs_cmd_t));
+
+	if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
+		nvlist_free(errors);
+		errors = NULL;
+	} else {
+		VERIFY(nvpair_value_int32(pair, &rv) == 0);
+	}
+
+	if (errlist == NULL)
+		nvlist_free(errors);
+	else
+		*errlist = errors;
+
+	return (rv);
+}
+
+static boolean_t
+propval_equals(nvpair_t *p1, nvpair_t *p2)
+{
+	if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
+		/* dsl_prop_get_all_impl() format */
+		nvlist_t *attrs;
+		VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
+		VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+		    &p1) == 0);
+	}
+
+	if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
+		nvlist_t *attrs;
+		VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
+		VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
+		    &p2) == 0);
+	}
+
+	if (nvpair_type(p1) != nvpair_type(p2))
+		return (B_FALSE);
+
+	if (nvpair_type(p1) == DATA_TYPE_STRING) {
+		char *valstr1, *valstr2;
+
+		VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
+		VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
+		return (strcmp(valstr1, valstr2) == 0);
+	} else {
+		uint64_t intval1, intval2;
+
+		VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
+		VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
+		return (intval1 == intval2);
+	}
+}
+
+/*
+ * Remove properties from props if they are not going to change (as determined
+ * by comparison with origprops). Remove them from origprops as well, since we
+ * do not need to clear or restore properties that won't change.
+ */
+static void
+props_reduce(nvlist_t *props, nvlist_t *origprops)
+{
+	nvpair_t *pair, *next_pair;
+
+	if (origprops == NULL)
+		return; /* all props need to be received */
+
+	pair = nvlist_next_nvpair(props, NULL);
+	while (pair != NULL) {
+		const char *propname = nvpair_name(pair);
+		nvpair_t *match;
+
+		next_pair = nvlist_next_nvpair(props, pair);
+
+		if ((nvlist_lookup_nvpair(origprops, propname,
+		    &match) != 0) || !propval_equals(pair, match))
+			goto next; /* need to set received value */
+
+		/* don't clear the existing received value */
+		(void) nvlist_remove_nvpair(origprops, match);
+		/* don't bother receiving the property */
+		(void) nvlist_remove_nvpair(props, pair);
+next:
+		pair = next_pair;
+	}
+}
+
+#ifdef	DEBUG
+static boolean_t zfs_ioc_recv_inject_err;
+#endif
+
+/*
+ * inputs:
+ * zc_name		name of containing filesystem
+ * zc_nvlist_src{_size}	nvlist of properties to apply
+ * zc_value		name of snapshot to create
+ * zc_string		name of clone origin (if DRR_FLAG_CLONE)
+ * zc_cookie		file descriptor to recv from
+ * zc_begin_record	the BEGIN record of the stream (not byteswapped)
+ * zc_guid		force flag
+ * zc_cleanup_fd	cleanup-on-exit file descriptor
+ * zc_action_handle	handle for this guid/ds mapping (or zero on first call)
+ *
+ * outputs:
+ * zc_cookie		number of bytes read
+ * zc_nvlist_dst{_size} error for each unapplied received property
+ * zc_obj		zprop_errflags_t
+ * zc_action_handle	handle for this guid/ds mapping
+ */
+static int
+zfs_ioc_recv(zfs_cmd_t *zc)
+{
+	file_t *fp;
+	objset_t *os;
+	dmu_recv_cookie_t drc;
+	boolean_t force = (boolean_t)zc->zc_guid;
+	int fd;
+	int error = 0;
+	int props_error = 0;
+	nvlist_t *errors;
+	offset_t off;
+	nvlist_t *props = NULL; /* sent properties */
+	nvlist_t *origprops = NULL; /* existing properties */
+	objset_t *origin = NULL;
+	char *tosnap;
+	char tofs[ZFS_MAXNAMELEN];
+	boolean_t first_recvd_props = B_FALSE;
+
+	if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
+	    strchr(zc->zc_value, '@') == NULL ||
+	    strchr(zc->zc_value, '%'))
+		return (EINVAL);
+
+	(void) strcpy(tofs, zc->zc_value);
+	tosnap = strchr(tofs, '@');
+	*tosnap++ = '\0';
+
+	if (zc->zc_nvlist_src != NULL &&
+	    (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
+	    zc->zc_iflags, &props)) != 0)
+		return (error);
+
+	fd = zc->zc_cookie;
+	fp = getf(fd);
+	if (fp == NULL) {
+		nvlist_free(props);
+		return (EBADF);
+	}
+
+	VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+
+	if (props && dmu_objset_hold(tofs, FTAG, &os) == 0) {
+		if ((spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS) &&
+		    !dsl_prop_get_hasrecvd(os)) {
+			first_recvd_props = B_TRUE;
+		}
+
+		/*
+		 * If new received properties are supplied, they are to
+		 * completely replace the existing received properties, so stash
+		 * away the existing ones.
+		 */
+		if (dsl_prop_get_received(os, &origprops) == 0) {
+			nvlist_t *errlist = NULL;
+			/*
+			 * Don't bother writing a property if its value won't
+			 * change (and avoid the unnecessary security checks).
+			 *
+			 * The first receive after SPA_VERSION_RECVD_PROPS is a
+			 * special case where we blow away all local properties
+			 * regardless.
+			 */
+			if (!first_recvd_props)
+				props_reduce(props, origprops);
+			if (zfs_check_clearable(tofs, origprops,
+			    &errlist) != 0)
+				(void) nvlist_merge(errors, errlist, 0);
+			nvlist_free(errlist);
+		}
+
+		dmu_objset_rele(os, FTAG);
+	}
+
+	if (zc->zc_string[0]) {
+		error = dmu_objset_hold(zc->zc_string, FTAG, &origin);
+		if (error)
+			goto out;
+	}
+
+	error = dmu_recv_begin(tofs, tosnap, zc->zc_top_ds,
+	    &zc->zc_begin_record, force, origin, &drc);
+	if (origin)
+		dmu_objset_rele(origin, FTAG);
+	if (error)
+		goto out;
+
+	/*
+	 * Set properties before we receive the stream so that they are applied
+	 * to the new data. Note that we must call dmu_recv_stream() if
+	 * dmu_recv_begin() succeeds.
+	 */
+	if (props) {
+		nvlist_t *errlist;
+
+		if (dmu_objset_from_ds(drc.drc_logical_ds, &os) == 0) {
+			if (drc.drc_newfs) {
+				if (spa_version(os->os_spa) >=
+				    SPA_VERSION_RECVD_PROPS)
+					first_recvd_props = B_TRUE;
+			} else if (origprops != NULL) {
+				if (clear_received_props(os, tofs, origprops,
+				    first_recvd_props ? NULL : props) != 0)
+					zc->zc_obj |= ZPROP_ERR_NOCLEAR;
+			} else {
+				zc->zc_obj |= ZPROP_ERR_NOCLEAR;
+			}
+			dsl_prop_set_hasrecvd(os);
+		} else if (!drc.drc_newfs) {
+			zc->zc_obj |= ZPROP_ERR_NOCLEAR;
+		}
+
+		(void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
+		    props, &errlist);
+		(void) nvlist_merge(errors, errlist, 0);
+		nvlist_free(errlist);
+	}
+
+	if (fit_error_list(zc, &errors) != 0 || put_nvlist(zc, errors) != 0) {
+		/*
+		 * Caller made zc->zc_nvlist_dst less than the minimum expected
+		 * size or supplied an invalid address.
+		 */
+		props_error = EINVAL;
+	}
+
+	off = fp->f_offset;
+	error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
+	    &zc->zc_action_handle);
+
+	if (error == 0) {
+		zfsvfs_t *zfsvfs = NULL;
+
+		if (getzfsvfs(tofs, &zfsvfs) == 0) {
+			/* online recv */
+			int end_err;
+
+			error = zfs_suspend_fs(zfsvfs);
+			/*
+			 * If the suspend fails, then the recv_end will
+			 * likely also fail, and clean up after itself.
+			 */
+			end_err = dmu_recv_end(&drc);
+			if (error == 0)
+				error = zfs_resume_fs(zfsvfs, tofs);
+			error = error ? error : end_err;
+			VFS_RELE(zfsvfs->z_vfs);
+		} else {
+			error = dmu_recv_end(&drc);
+		}
+	}
+
+	zc->zc_cookie = off - fp->f_offset;
+	if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
+		fp->f_offset = off;
+
+#ifdef	DEBUG
+	if (zfs_ioc_recv_inject_err) {
+		zfs_ioc_recv_inject_err = B_FALSE;
+		error = 1;
+	}
+#endif
+	/*
+	 * On error, restore the original props.
+	 */
+	if (error && props) {
+		if (dmu_objset_hold(tofs, FTAG, &os) == 0) {
+			if (clear_received_props(os, tofs, props, NULL) != 0) {
+				/*
+				 * We failed to clear the received properties.
+				 * Since we may have left a $recvd value on the
+				 * system, we can't clear the $hasrecvd flag.
+				 */
+				zc->zc_obj |= ZPROP_ERR_NORESTORE;
+			} else if (first_recvd_props) {
+				dsl_prop_unset_hasrecvd(os);
+			}
+			dmu_objset_rele(os, FTAG);
+		} else if (!drc.drc_newfs) {
+			/* We failed to clear the received properties. */
+			zc->zc_obj |= ZPROP_ERR_NORESTORE;
+		}
+
+		if (origprops == NULL && !drc.drc_newfs) {
+			/* We failed to stash the original properties. */
+			zc->zc_obj |= ZPROP_ERR_NORESTORE;
+		}
+
+		/*
+		 * dsl_props_set() will not convert RECEIVED to LOCAL on or
+		 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
+		 * explictly if we're restoring local properties cleared in the
+		 * first new-style receive.
+		 */
+		if (origprops != NULL &&
+		    zfs_set_prop_nvlist(tofs, (first_recvd_props ?
+		    ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
+		    origprops, NULL) != 0) {
+			/*
+			 * We stashed the original properties but failed to
+			 * restore them.
+			 */
+			zc->zc_obj |= ZPROP_ERR_NORESTORE;
+		}
+	}
+out:
+	nvlist_free(props);
+	nvlist_free(origprops);
+	nvlist_free(errors);
+	releasef(fd);
+
+	if (error == 0)
+		error = props_error;
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name	name of snapshot to send
+ * zc_cookie	file descriptor to send stream to
+ * zc_obj	fromorigin flag (mutually exclusive with zc_fromobj)
+ * zc_sendobj	objsetid of snapshot to send
+ * zc_fromobj	objsetid of incremental fromsnap (may be zero)
+ *
+ * outputs: none
+ */
+static int
+zfs_ioc_send(zfs_cmd_t *zc)
+{
+	objset_t *fromsnap = NULL;
+	objset_t *tosnap;
+	file_t *fp;
+	int error;
+	offset_t off;
+	dsl_dataset_t *ds;
+	dsl_dataset_t *dsfrom = NULL;
+	spa_t *spa;
+	dsl_pool_t *dp;
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error)
+		return (error);
+
+	dp = spa_get_dsl(spa);
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+	error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
+	rw_exit(&dp->dp_config_rwlock);
+	if (error) {
+		spa_close(spa, FTAG);
+		return (error);
+	}
+
+	error = dmu_objset_from_ds(ds, &tosnap);
+	if (error) {
+		dsl_dataset_rele(ds, FTAG);
+		spa_close(spa, FTAG);
+		return (error);
+	}
+
+	if (zc->zc_fromobj != 0) {
+		rw_enter(&dp->dp_config_rwlock, RW_READER);
+		error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, FTAG, &dsfrom);
+		rw_exit(&dp->dp_config_rwlock);
+		spa_close(spa, FTAG);
+		if (error) {
+			dsl_dataset_rele(ds, FTAG);
+			return (error);
+		}
+		error = dmu_objset_from_ds(dsfrom, &fromsnap);
+		if (error) {
+			dsl_dataset_rele(dsfrom, FTAG);
+			dsl_dataset_rele(ds, FTAG);
+			return (error);
+		}
+	} else {
+		spa_close(spa, FTAG);
+	}
+
+	fp = getf(zc->zc_cookie);
+	if (fp == NULL) {
+		dsl_dataset_rele(ds, FTAG);
+		if (dsfrom)
+			dsl_dataset_rele(dsfrom, FTAG);
+		return (EBADF);
+	}
+
+	off = fp->f_offset;
+	error = dmu_sendbackup(tosnap, fromsnap, zc->zc_obj, fp->f_vnode, &off);
+
+	if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
+		fp->f_offset = off;
+	releasef(zc->zc_cookie);
+	if (dsfrom)
+		dsl_dataset_rele(dsfrom, FTAG);
+	dsl_dataset_rele(ds, FTAG);
+	return (error);
+}
+
+static int
+zfs_ioc_inject_fault(zfs_cmd_t *zc)
+{
+	int id, error;
+
+	error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
+	    &zc->zc_inject_record);
+
+	if (error == 0)
+		zc->zc_guid = (uint64_t)id;
+
+	return (error);
+}
+
+static int
+zfs_ioc_clear_fault(zfs_cmd_t *zc)
+{
+	return (zio_clear_fault((int)zc->zc_guid));
+}
+
+static int
+zfs_ioc_inject_list_next(zfs_cmd_t *zc)
+{
+	int id = (int)zc->zc_guid;
+	int error;
+
+	error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
+	    &zc->zc_inject_record);
+
+	zc->zc_guid = id;
+
+	return (error);
+}
+
+static int
+zfs_ioc_error_log(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	int error;
+	size_t count = (size_t)zc->zc_nvlist_dst_size;
+
+	if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
+		return (error);
+
+	error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
+	    &count);
+	if (error == 0)
+		zc->zc_nvlist_dst_size = count;
+	else
+		zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
+
+	spa_close(spa, FTAG);
+
+	return (error);
+}
+
+static int
+zfs_ioc_clear(zfs_cmd_t *zc)
+{
+	spa_t *spa;
+	vdev_t *vd;
+	int error;
+
+	/*
+	 * On zpool clear we also fix up missing slogs
+	 */
+	mutex_enter(&spa_namespace_lock);
+	spa = spa_lookup(zc->zc_name);
+	if (spa == NULL) {
+		mutex_exit(&spa_namespace_lock);
+		return (EIO);
+	}
+	if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
+		/* we need to let spa_open/spa_load clear the chains */
+		spa_set_log_state(spa, SPA_LOG_CLEAR);
+	}
+	spa->spa_last_open_failed = 0;
+	mutex_exit(&spa_namespace_lock);
+
+	if (zc->zc_cookie & ZPOOL_NO_REWIND) {
+		error = spa_open(zc->zc_name, &spa, FTAG);
+	} else {
+		nvlist_t *policy;
+		nvlist_t *config = NULL;
+
+		if (zc->zc_nvlist_src == NULL)
+			return (EINVAL);
+
+		if ((error = get_nvlist(zc->zc_nvlist_src,
+		    zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
+			error = spa_open_rewind(zc->zc_name, &spa, FTAG,
+			    policy, &config);
+			if (config != NULL) {
+				int err;
+
+				if ((err = put_nvlist(zc, config)) != 0)
+					error = err;
+				nvlist_free(config);
+			}
+			nvlist_free(policy);
+		}
+	}
+
+	if (error)
+		return (error);
+
+	spa_vdev_state_enter(spa, SCL_NONE);
+
+	if (zc->zc_guid == 0) {
+		vd = NULL;
+	} else {
+		vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
+		if (vd == NULL) {
+			(void) spa_vdev_state_exit(spa, NULL, ENODEV);
+			spa_close(spa, FTAG);
+			return (ENODEV);
+		}
+	}
+
+	vdev_clear(spa, vd);
+
+	(void) spa_vdev_state_exit(spa, NULL, 0);
+
+	/*
+	 * Resume any suspended I/Os.
+	 */
+	if (zio_resume(spa) != 0)
+		error = EIO;
+
+	spa_close(spa, FTAG);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name	name of filesystem
+ * zc_value	name of origin snapshot
+ *
+ * outputs:
+ * zc_string	name of conflicting snapshot, if there is one
+ */
+static int
+zfs_ioc_promote(zfs_cmd_t *zc)
+{
+	char *cp;
+
+	/*
+	 * We don't need to unmount *all* the origin fs's snapshots, but
+	 * it's easier.
+	 */
+	cp = strchr(zc->zc_value, '@');
+	if (cp)
+		*cp = '\0';
+	(void) dmu_objset_find(zc->zc_value,
+	    zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS);
+	return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
+}
+
+/*
+ * Retrieve a single {user|group}{used|quota}@... property.
+ *
+ * inputs:
+ * zc_name	name of filesystem
+ * zc_objset_type zfs_userquota_prop_t
+ * zc_value	domain name (eg. "S-1-234-567-89")
+ * zc_guid	RID/UID/GID
+ *
+ * outputs:
+ * zc_cookie	property value
+ */
+static int
+zfs_ioc_userspace_one(zfs_cmd_t *zc)
+{
+	zfsvfs_t *zfsvfs;
+	int error;
+
+	if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
+		return (EINVAL);
+
+	error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
+	if (error)
+		return (error);
+
+	error = zfs_userspace_one(zfsvfs,
+	    zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
+	zfsvfs_rele(zfsvfs, FTAG);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_cookie		zap cursor
+ * zc_objset_type	zfs_userquota_prop_t
+ * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
+ *
+ * outputs:
+ * zc_nvlist_dst[_size]	data buffer (array of zfs_useracct_t)
+ * zc_cookie	zap cursor
+ */
+static int
+zfs_ioc_userspace_many(zfs_cmd_t *zc)
+{
+	zfsvfs_t *zfsvfs;
+	int bufsize = zc->zc_nvlist_dst_size;
+
+	if (bufsize <= 0)
+		return (ENOMEM);
+
+	int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
+	if (error)
+		return (error);
+
+	void *buf = kmem_alloc(bufsize, KM_SLEEP);
+
+	error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
+	    buf, &zc->zc_nvlist_dst_size);
+
+	if (error == 0) {
+		error = xcopyout(buf,
+		    (void *)(uintptr_t)zc->zc_nvlist_dst,
+		    zc->zc_nvlist_dst_size);
+	}
+	kmem_free(buf, bufsize);
+	zfsvfs_rele(zfsvfs, FTAG);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ *
+ * outputs:
+ * none
+ */
+static int
+zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
+{
+	objset_t *os;
+	int error = 0;
+	zfsvfs_t *zfsvfs;
+
+	if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
+		if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
+			/*
+			 * If userused is not enabled, it may be because the
+			 * objset needs to be closed & reopened (to grow the
+			 * objset_phys_t).  Suspend/resume the fs will do that.
+			 */
+			error = zfs_suspend_fs(zfsvfs);
+			if (error == 0)
+				error = zfs_resume_fs(zfsvfs, zc->zc_name);
+		}
+		if (error == 0)
+			error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
+		VFS_RELE(zfsvfs->z_vfs);
+	} else {
+		/* XXX kind of reading contents without owning */
+		error = dmu_objset_hold(zc->zc_name, FTAG, &os);
+		if (error)
+			return (error);
+
+		error = dmu_objset_userspace_upgrade(os);
+		dmu_objset_rele(os, FTAG);
+	}
+
+	return (error);
+}
+
+/*
+ * We don't want to have a hard dependency
+ * against some special symbols in sharefs
+ * nfs, and smbsrv.  Determine them if needed when
+ * the first file system is shared.
+ * Neither sharefs, nfs or smbsrv are unloadable modules.
+ */
+int (*znfsexport_fs)(void *arg);
+int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
+int (*zsmbexport_fs)(void *arg, boolean_t add_share);
+
+int zfs_nfsshare_inited;
+int zfs_smbshare_inited;
+
+ddi_modhandle_t nfs_mod;
+ddi_modhandle_t sharefs_mod;
+ddi_modhandle_t smbsrv_mod;
+kmutex_t zfs_share_lock;
+
+static int
+zfs_init_sharefs()
+{
+	int error;
+
+	ASSERT(MUTEX_HELD(&zfs_share_lock));
+	/* Both NFS and SMB shares also require sharetab support. */
+	if (sharefs_mod == NULL && ((sharefs_mod =
+	    ddi_modopen("fs/sharefs",
+	    KRTLD_MODE_FIRST, &error)) == NULL)) {
+		return (ENOSYS);
+	}
+	if (zshare_fs == NULL && ((zshare_fs =
+	    (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
+	    ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
+		return (ENOSYS);
+	}
+	return (0);
+}
+
+static int
+zfs_ioc_share(zfs_cmd_t *zc)
+{
+	int error;
+	int opcode;
+
+	switch (zc->zc_share.z_sharetype) {
+	case ZFS_SHARE_NFS:
+	case ZFS_UNSHARE_NFS:
+		if (zfs_nfsshare_inited == 0) {
+			mutex_enter(&zfs_share_lock);
+			if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
+			    KRTLD_MODE_FIRST, &error)) == NULL)) {
+				mutex_exit(&zfs_share_lock);
+				return (ENOSYS);
+			}
+			if (znfsexport_fs == NULL &&
+			    ((znfsexport_fs = (int (*)(void *))
+			    ddi_modsym(nfs_mod,
+			    "nfs_export", &error)) == NULL)) {
+				mutex_exit(&zfs_share_lock);
+				return (ENOSYS);
+			}
+			error = zfs_init_sharefs();
+			if (error) {
+				mutex_exit(&zfs_share_lock);
+				return (ENOSYS);
+			}
+			zfs_nfsshare_inited = 1;
+			mutex_exit(&zfs_share_lock);
+		}
+		break;
+	case ZFS_SHARE_SMB:
+	case ZFS_UNSHARE_SMB:
+		if (zfs_smbshare_inited == 0) {
+			mutex_enter(&zfs_share_lock);
+			if (smbsrv_mod == NULL && ((smbsrv_mod =
+			    ddi_modopen("drv/smbsrv",
+			    KRTLD_MODE_FIRST, &error)) == NULL)) {
+				mutex_exit(&zfs_share_lock);
+				return (ENOSYS);
+			}
+			if (zsmbexport_fs == NULL && ((zsmbexport_fs =
+			    (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
+			    "smb_server_share", &error)) == NULL)) {
+				mutex_exit(&zfs_share_lock);
+				return (ENOSYS);
+			}
+			error = zfs_init_sharefs();
+			if (error) {
+				mutex_exit(&zfs_share_lock);
+				return (ENOSYS);
+			}
+			zfs_smbshare_inited = 1;
+			mutex_exit(&zfs_share_lock);
+		}
+		break;
+	default:
+		return (EINVAL);
+	}
+
+	switch (zc->zc_share.z_sharetype) {
+	case ZFS_SHARE_NFS:
+	case ZFS_UNSHARE_NFS:
+		if (error =
+		    znfsexport_fs((void *)
+		    (uintptr_t)zc->zc_share.z_exportdata))
+			return (error);
+		break;
+	case ZFS_SHARE_SMB:
+	case ZFS_UNSHARE_SMB:
+		if (error = zsmbexport_fs((void *)
+		    (uintptr_t)zc->zc_share.z_exportdata,
+		    zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
+		    B_TRUE: B_FALSE)) {
+			return (error);
+		}
+		break;
+	}
+
+	opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
+	    zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
+	    SHAREFS_ADD : SHAREFS_REMOVE;
+
+	/*
+	 * Add or remove share from sharetab
+	 */
+	error = zshare_fs(opcode,
+	    (void *)(uintptr_t)zc->zc_share.z_sharedata,
+	    zc->zc_share.z_sharemax);
+
+	return (error);
+
+}
+
+ace_t full_access[] = {
+	{(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
+};
+
+/*
+ * inputs:
+ * zc_name		name of containing filesystem
+ * zc_obj		object # beyond which we want next in-use object #
+ *
+ * outputs:
+ * zc_obj		next in-use object #
+ */
+static int
+zfs_ioc_next_obj(zfs_cmd_t *zc)
+{
+	objset_t *os = NULL;
+	int error;
+
+	error = dmu_objset_hold(zc->zc_name, FTAG, &os);
+	if (error)
+		return (error);
+
+	error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
+	    os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
+
+	dmu_objset_rele(os, FTAG);
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_value		prefix name for snapshot
+ * zc_cleanup_fd	cleanup-on-exit file descriptor for calling process
+ *
+ * outputs:
+ */
+static int
+zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
+{
+	char *snap_name;
+	int error;
+
+	snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
+	    (u_longlong_t)ddi_get_lbolt64());
+
+	if (strlen(snap_name) >= MAXNAMELEN) {
+		strfree(snap_name);
+		return (E2BIG);
+	}
+
+	error = dmu_objset_snapshot(zc->zc_name, snap_name, snap_name,
+	    NULL, B_FALSE, B_TRUE, zc->zc_cleanup_fd);
+	if (error != 0) {
+		strfree(snap_name);
+		return (error);
+	}
+
+	(void) strcpy(zc->zc_value, snap_name);
+	strfree(snap_name);
+	return (0);
+}
+
+/*
+ * inputs:
+ * zc_name		name of "to" snapshot
+ * zc_value		name of "from" snapshot
+ * zc_cookie		file descriptor to write diff data on
+ *
+ * outputs:
+ * dmu_diff_record_t's to the file descriptor
+ */
+static int
+zfs_ioc_diff(zfs_cmd_t *zc)
+{
+	objset_t *fromsnap;
+	objset_t *tosnap;
+	file_t *fp;
+	offset_t off;
+	int error;
+
+	error = dmu_objset_hold(zc->zc_name, FTAG, &tosnap);
+	if (error)
+		return (error);
+
+	error = dmu_objset_hold(zc->zc_value, FTAG, &fromsnap);
+	if (error) {
+		dmu_objset_rele(tosnap, FTAG);
+		return (error);
+	}
+
+	fp = getf(zc->zc_cookie);
+	if (fp == NULL) {
+		dmu_objset_rele(fromsnap, FTAG);
+		dmu_objset_rele(tosnap, FTAG);
+		return (EBADF);
+	}
+
+	off = fp->f_offset;
+
+	error = dmu_diff(tosnap, fromsnap, fp->f_vnode, &off);
+
+	if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
+		fp->f_offset = off;
+	releasef(zc->zc_cookie);
+
+	dmu_objset_rele(fromsnap, FTAG);
+	dmu_objset_rele(tosnap, FTAG);
+	return (error);
+}
+
+/*
+ * Remove all ACL files in shares dir
+ */
+static int
+zfs_smb_acl_purge(znode_t *dzp)
+{
+	zap_cursor_t	zc;
+	zap_attribute_t	zap;
+	zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
+	int error;
+
+	for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
+	    (error = zap_cursor_retrieve(&zc, &zap)) == 0;
+	    zap_cursor_advance(&zc)) {
+		if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
+		    NULL, 0)) != 0)
+			break;
+	}
+	zap_cursor_fini(&zc);
+	return (error);
+}
+
+static int
+zfs_ioc_smb_acl(zfs_cmd_t *zc)
+{
+	vnode_t *vp;
+	znode_t *dzp;
+	vnode_t *resourcevp = NULL;
+	znode_t *sharedir;
+	zfsvfs_t *zfsvfs;
+	nvlist_t *nvlist;
+	char *src, *target;
+	vattr_t vattr;
+	vsecattr_t vsec;
+	int error = 0;
+
+	if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
+	    NO_FOLLOW, NULL, &vp)) != 0)
+		return (error);
+
+	/* Now make sure mntpnt and dataset are ZFS */
+
+	if (vp->v_vfsp->vfs_fstype != zfsfstype ||
+	    (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
+	    zc->zc_name) != 0)) {
+		VN_RELE(vp);
+		return (EINVAL);
+	}
+
+	dzp = VTOZ(vp);
+	zfsvfs = dzp->z_zfsvfs;
+	ZFS_ENTER(zfsvfs);
+
+	/*
+	 * Create share dir if its missing.
+	 */
+	mutex_enter(&zfsvfs->z_lock);
+	if (zfsvfs->z_shares_dir == 0) {
+		dmu_tx_t *tx;
+
+		tx = dmu_tx_create(zfsvfs->z_os);
+		dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
+		    ZFS_SHARES_DIR);
+		dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
+		error = dmu_tx_assign(tx, TXG_WAIT);
+		if (error) {
+			dmu_tx_abort(tx);
+		} else {
+			error = zfs_create_share_dir(zfsvfs, tx);
+			dmu_tx_commit(tx);
+		}
+		if (error) {
+			mutex_exit(&zfsvfs->z_lock);
+			VN_RELE(vp);
+			ZFS_EXIT(zfsvfs);
+			return (error);
+		}
+	}
+	mutex_exit(&zfsvfs->z_lock);
+
+	ASSERT(zfsvfs->z_shares_dir);
+	if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
+		VN_RELE(vp);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	switch (zc->zc_cookie) {
+	case ZFS_SMB_ACL_ADD:
+		vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
+		vattr.va_type = VREG;
+		vattr.va_mode = S_IFREG|0777;
+		vattr.va_uid = 0;
+		vattr.va_gid = 0;
+
+		vsec.vsa_mask = VSA_ACE;
+		vsec.vsa_aclentp = &full_access;
+		vsec.vsa_aclentsz = sizeof (full_access);
+		vsec.vsa_aclcnt = 1;
+
+		error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
+		    &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
+		if (resourcevp)
+			VN_RELE(resourcevp);
+		break;
+
+	case ZFS_SMB_ACL_REMOVE:
+		error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
+		    NULL, 0);
+		break;
+
+	case ZFS_SMB_ACL_RENAME:
+		if ((error = get_nvlist(zc->zc_nvlist_src,
+		    zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
+			VN_RELE(vp);
+			ZFS_EXIT(zfsvfs);
+			return (error);
+		}
+		if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
+		    nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
+		    &target)) {
+			VN_RELE(vp);
+			VN_RELE(ZTOV(sharedir));
+			ZFS_EXIT(zfsvfs);
+			nvlist_free(nvlist);
+			return (error);
+		}
+		error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
+		    kcred, NULL, 0);
+		nvlist_free(nvlist);
+		break;
+
+	case ZFS_SMB_ACL_PURGE:
+		error = zfs_smb_acl_purge(sharedir);
+		break;
+
+	default:
+		error = EINVAL;
+		break;
+	}
+
+	VN_RELE(vp);
+	VN_RELE(ZTOV(sharedir));
+
+	ZFS_EXIT(zfsvfs);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ * zc_value		short name of snap
+ * zc_string		user-supplied tag for this hold
+ * zc_cookie		recursive flag
+ * zc_temphold		set if hold is temporary
+ * zc_cleanup_fd	cleanup-on-exit file descriptor for calling process
+ * zc_sendobj		if non-zero, the objid for zc_name@zc_value
+ * zc_createtxg		if zc_sendobj is non-zero, snap must have zc_createtxg
+ *
+ * outputs:		none
+ */
+static int
+zfs_ioc_hold(zfs_cmd_t *zc)
+{
+	boolean_t recursive = zc->zc_cookie;
+	spa_t *spa;
+	dsl_pool_t *dp;
+	dsl_dataset_t *ds;
+	int error;
+	minor_t minor = 0;
+
+	if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
+		return (EINVAL);
+
+	if (zc->zc_sendobj == 0) {
+		return (dsl_dataset_user_hold(zc->zc_name, zc->zc_value,
+		    zc->zc_string, recursive, zc->zc_temphold,
+		    zc->zc_cleanup_fd));
+	}
+
+	if (recursive)
+		return (EINVAL);
+
+	error = spa_open(zc->zc_name, &spa, FTAG);
+	if (error)
+		return (error);
+
+	dp = spa_get_dsl(spa);
+	rw_enter(&dp->dp_config_rwlock, RW_READER);
+	error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
+	rw_exit(&dp->dp_config_rwlock);
+	spa_close(spa, FTAG);
+	if (error)
+		return (error);
+
+	/*
+	 * Until we have a hold on this snapshot, it's possible that
+	 * zc_sendobj could've been destroyed and reused as part
+	 * of a later txg.  Make sure we're looking at the right object.
+	 */
+	if (zc->zc_createtxg != ds->ds_phys->ds_creation_txg) {
+		dsl_dataset_rele(ds, FTAG);
+		return (ENOENT);
+	}
+
+	if (zc->zc_cleanup_fd != -1 && zc->zc_temphold) {
+		error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
+		if (error) {
+			dsl_dataset_rele(ds, FTAG);
+			return (error);
+		}
+	}
+
+	error = dsl_dataset_user_hold_for_send(ds, zc->zc_string,
+	    zc->zc_temphold);
+	if (minor != 0) {
+		if (error == 0) {
+			dsl_register_onexit_hold_cleanup(ds, zc->zc_string,
+			    minor);
+		}
+		zfs_onexit_fd_rele(zc->zc_cleanup_fd);
+	}
+	dsl_dataset_rele(ds, FTAG);
+
+	return (error);
+}
+
+/*
+ * inputs:
+ * zc_name	name of dataset from which we're releasing a user hold
+ * zc_value	short name of snap
+ * zc_string	user-supplied tag for this hold
+ * zc_cookie	recursive flag
+ *
+ * outputs:	none
+ */
+static int
+zfs_ioc_release(zfs_cmd_t *zc)
+{
+	boolean_t recursive = zc->zc_cookie;
+
+	if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
+		return (EINVAL);
+
+	return (dsl_dataset_user_release(zc->zc_name, zc->zc_value,
+	    zc->zc_string, recursive));
+}
+
+/*
+ * inputs:
+ * zc_name		name of filesystem
+ *
+ * outputs:
+ * zc_nvlist_src{_size}	nvlist of snapshot holds
+ */
+static int
+zfs_ioc_get_holds(zfs_cmd_t *zc)
+{
+	nvlist_t *nvp;
+	int error;
+
+	if ((error = dsl_dataset_get_holds(zc->zc_name, &nvp)) == 0) {
+		error = put_nvlist(zc, nvp);
+		nvlist_free(nvp);
+	}
+
+	return (error);
+}
+
+/*
+ * pool create, destroy, and export don't log the history as part of
+ * zfsdev_ioctl, but rather zfs_ioc_pool_create, and zfs_ioc_pool_export
+ * do the logging of those commands.
+ */
+static zfs_ioc_vec_t zfs_ioc_vec[] = {
+	{ zfs_ioc_pool_create, zfs_secpolicy_config, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_destroy,	zfs_secpolicy_config, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_import, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_export, zfs_secpolicy_config, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_configs,	zfs_secpolicy_none, NO_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_stats, zfs_secpolicy_read, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_tryimport, zfs_secpolicy_config, NO_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_pool_scan, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE,
+	    POOL_CHECK_READONLY },
+	{ zfs_ioc_pool_upgrade,	zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_pool_get_history, zfs_secpolicy_config, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_vdev_add, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_vdev_remove, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_vdev_set_state, zfs_secpolicy_config,	POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_vdev_attach, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_vdev_detach, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_vdev_setpath,	zfs_secpolicy_config, POOL_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_vdev_setfru,	zfs_secpolicy_config, POOL_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_objset_stats,	zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED },
+	{ zfs_ioc_objset_zplprops, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_dataset_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED },
+	{ zfs_ioc_snapshot_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED },
+	{ zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_rename, zfs_secpolicy_rename,	DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_recv, zfs_secpolicy_receive, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_send, zfs_secpolicy_send, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_inject_fault,	zfs_secpolicy_inject, NO_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_clear_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_inject_list_next, zfs_secpolicy_inject, NO_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_error_log, zfs_secpolicy_inject, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_clear, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_promote, zfs_secpolicy_promote, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, DATASET_NAME,
+	    B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_snapshot, zfs_secpolicy_snapshot, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_dsobj_to_dsname, zfs_secpolicy_diff, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_obj_to_path, zfs_secpolicy_diff, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED },
+	{ zfs_ioc_pool_set_props, zfs_secpolicy_config,	POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_pool_get_props, zfs_secpolicy_read, POOL_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_set_fsacl, zfs_secpolicy_fsacl, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_get_fsacl, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_share, zfs_secpolicy_share, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_inherit_prop, zfs_secpolicy_inherit, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_smb_acl, zfs_secpolicy_smb_acl, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_userspace_one, zfs_secpolicy_userspace_one, DATASET_NAME,
+	    B_FALSE, POOL_CHECK_NONE },
+	{ zfs_ioc_userspace_many, zfs_secpolicy_userspace_many, DATASET_NAME,
+	    B_FALSE, POOL_CHECK_NONE },
+	{ zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
+	    DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_hold, zfs_secpolicy_hold, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_release, zfs_secpolicy_release, DATASET_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED },
+	{ zfs_ioc_objset_recvd_props, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_vdev_split, zfs_secpolicy_config, POOL_NAME, B_TRUE,
+	    POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_next_obj, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_diff, zfs_secpolicy_diff, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_NONE },
+	{ zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot, DATASET_NAME,
+	    B_FALSE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
+	{ zfs_ioc_obj_to_stats, zfs_secpolicy_diff, DATASET_NAME, B_FALSE,
+	    POOL_CHECK_SUSPENDED }
+};
+
+int
+pool_status_check(const char *name, zfs_ioc_namecheck_t type,
+    zfs_ioc_poolcheck_t check)
+{
+	spa_t *spa;
+	int error;
+
+	ASSERT(type == POOL_NAME || type == DATASET_NAME);
+
+	if (check & POOL_CHECK_NONE)
+		return (0);
+
+	error = spa_open(name, &spa, FTAG);
+	if (error == 0) {
+		if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
+			error = EAGAIN;
+		else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
+			error = EROFS;
+		spa_close(spa, FTAG);
+	}
+	return (error);
+}
+
+/*
+ * Find a free minor number.
+ */
+minor_t
+zfsdev_minor_alloc(void)
+{
+	static minor_t last_minor;
+	minor_t m;
+
+	ASSERT(MUTEX_HELD(&zfsdev_state_lock));
+
+	for (m = last_minor + 1; m != last_minor; m++) {
+		if (m > ZFSDEV_MAX_MINOR)
+			m = 1;
+		if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
+			last_minor = m;
+			return (m);
+		}
+	}
+
+	return (0);
+}
+
+static int
+zfs_ctldev_init(dev_t *devp)
+{
+	minor_t minor;
+	zfs_soft_state_t *zs;
+
+	ASSERT(MUTEX_HELD(&zfsdev_state_lock));
+	ASSERT(getminor(*devp) == 0);
+
+	minor = zfsdev_minor_alloc();
+	if (minor == 0)
+		return (ENXIO);
+
+	if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
+		return (EAGAIN);
+
+	*devp = makedevice(getemajor(*devp), minor);
+
+	zs = ddi_get_soft_state(zfsdev_state, minor);
+	zs->zss_type = ZSST_CTLDEV;
+	zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
+
+	return (0);
+}
+
+static void
+zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
+{
+	ASSERT(MUTEX_HELD(&zfsdev_state_lock));
+
+	zfs_onexit_destroy(zo);
+	ddi_soft_state_free(zfsdev_state, minor);
+}
+
+void *
+zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
+{
+	zfs_soft_state_t *zp;
+
+	zp = ddi_get_soft_state(zfsdev_state, minor);
+	if (zp == NULL || zp->zss_type != which)
+		return (NULL);
+
+	return (zp->zss_data);
+}
+
+static int
+zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
+{
+	int error = 0;
+
+	if (getminor(*devp) != 0)
+		return (zvol_open(devp, flag, otyp, cr));
+
+	/* This is the control device. Allocate a new minor if requested. */
+	if (flag & FEXCL) {
+		mutex_enter(&zfsdev_state_lock);
+		error = zfs_ctldev_init(devp);
+		mutex_exit(&zfsdev_state_lock);
+	}
+
+	return (error);
+}
+
+static int
+zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
+{
+	zfs_onexit_t *zo;
+	minor_t minor = getminor(dev);
+
+	if (minor == 0)
+		return (0);
+
+	mutex_enter(&zfsdev_state_lock);
+	zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
+	if (zo == NULL) {
+		mutex_exit(&zfsdev_state_lock);
+		return (zvol_close(dev, flag, otyp, cr));
+	}
+	zfs_ctldev_destroy(zo, minor);
+	mutex_exit(&zfsdev_state_lock);
+
+	return (0);
+}
+
+static int
+zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
+{
+	zfs_cmd_t *zc;
+	uint_t vec;
+	int error, rc;
+	minor_t minor = getminor(dev);
+
+	if (minor != 0 &&
+	    zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
+		return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
+
+	vec = cmd - ZFS_IOC;
+	ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
+
+	if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
+		return (EINVAL);
+
+	zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
+
+	error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
+	if (error != 0)
+		error = EFAULT;
+
+	if ((error == 0) && !(flag & FKIOCTL))
+		error = zfs_ioc_vec[vec].zvec_secpolicy(zc, cr);
+
+	/*
+	 * Ensure that all pool/dataset names are valid before we pass down to
+	 * the lower layers.
+	 */
+	if (error == 0) {
+		zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
+		zc->zc_iflags = flag & FKIOCTL;
+		switch (zfs_ioc_vec[vec].zvec_namecheck) {
+		case POOL_NAME:
+			if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
+				error = EINVAL;
+			error = pool_status_check(zc->zc_name,
+			    zfs_ioc_vec[vec].zvec_namecheck,
+			    zfs_ioc_vec[vec].zvec_pool_check);
+			break;
+
+		case DATASET_NAME:
+			if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
+				error = EINVAL;
+			error = pool_status_check(zc->zc_name,
+			    zfs_ioc_vec[vec].zvec_namecheck,
+			    zfs_ioc_vec[vec].zvec_pool_check);
+			break;
+
+		case NO_NAME:
+			break;
+		}
+	}
+
+	if (error == 0)
+		error = zfs_ioc_vec[vec].zvec_func(zc);
+
+	rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
+	if (error == 0) {
+		if (rc != 0)
+			error = EFAULT;
+		if (zfs_ioc_vec[vec].zvec_his_log)
+			zfs_log_history(zc);
+	}
+
+	kmem_free(zc, sizeof (zfs_cmd_t));
+	return (error);
+}
+
+static int
+zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
+{
+	if (cmd != DDI_ATTACH)
+		return (DDI_FAILURE);
+
+	if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
+	    DDI_PSEUDO, 0) == DDI_FAILURE)
+		return (DDI_FAILURE);
+
+	zfs_dip = dip;
+
+	ddi_report_dev(dip);
+
+	return (DDI_SUCCESS);
+}
+
+static int
+zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
+{
+	if (spa_busy() || zfs_busy() || zvol_busy())
+		return (DDI_FAILURE);
+
+	if (cmd != DDI_DETACH)
+		return (DDI_FAILURE);
+
+	zfs_dip = NULL;
+
+	ddi_prop_remove_all(dip);
+	ddi_remove_minor_node(dip, NULL);
+
+	return (DDI_SUCCESS);
+}
+
+/*ARGSUSED*/
+static int
+zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
+{
+	switch (infocmd) {
+	case DDI_INFO_DEVT2DEVINFO:
+		*result = zfs_dip;
+		return (DDI_SUCCESS);
+
+	case DDI_INFO_DEVT2INSTANCE:
+		*result = (void *)0;
+		return (DDI_SUCCESS);
+	}
+
+	return (DDI_FAILURE);
+}
+
+/*
+ * OK, so this is a little weird.
+ *
+ * /dev/zfs is the control node, i.e. minor 0.
+ * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
+ *
+ * /dev/zfs has basically nothing to do except serve up ioctls,
+ * so most of the standard driver entry points are in zvol.c.
+ */
+static struct cb_ops zfs_cb_ops = {
+	zfsdev_open,	/* open */
+	zfsdev_close,	/* close */
+	zvol_strategy,	/* strategy */
+	nodev,		/* print */
+	zvol_dump,	/* dump */
+	zvol_read,	/* read */
+	zvol_write,	/* write */
+	zfsdev_ioctl,	/* ioctl */
+	nodev,		/* devmap */
+	nodev,		/* mmap */
+	nodev,		/* segmap */
+	nochpoll,	/* poll */
+	ddi_prop_op,	/* prop_op */
+	NULL,		/* streamtab */
+	D_NEW | D_MP | D_64BIT,		/* Driver compatibility flag */
+	CB_REV,		/* version */
+	nodev,		/* async read */
+	nodev,		/* async write */
+};
+
+static struct dev_ops zfs_dev_ops = {
+	DEVO_REV,	/* version */
+	0,		/* refcnt */
+	zfs_info,	/* info */
+	nulldev,	/* identify */
+	nulldev,	/* probe */
+	zfs_attach,	/* attach */
+	zfs_detach,	/* detach */
+	nodev,		/* reset */
+	&zfs_cb_ops,	/* driver operations */
+	NULL,		/* no bus operations */
+	NULL,		/* power */
+	ddi_quiesce_not_needed,	/* quiesce */
+};
+
+static struct modldrv zfs_modldrv = {
+	&mod_driverops,
+	"ZFS storage pool",
+	&zfs_dev_ops
+};
+
+static struct modlinkage modlinkage = {
+	MODREV_1,
+	(void *)&zfs_modlfs,
+	(void *)&zfs_modldrv,
+	NULL
+};
+
+
+uint_t zfs_fsyncer_key;
+extern uint_t rrw_tsd_key;
+
+int
+_init(void)
+{
+	int error;
+
+	spa_init(FREAD | FWRITE);
+	zfs_init();
+	zvol_init();
+
+	if ((error = mod_install(&modlinkage)) != 0) {
+		zvol_fini();
+		zfs_fini();
+		spa_fini();
+		return (error);
+	}
+
+	tsd_create(&zfs_fsyncer_key, NULL);
+	tsd_create(&rrw_tsd_key, NULL);
+
+	error = ldi_ident_from_mod(&modlinkage, &zfs_li);
+	ASSERT(error == 0);
+	mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	return (0);
+}
+
+int
+_fini(void)
+{
+	int error;
+
+	if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
+		return (EBUSY);
+
+	if ((error = mod_remove(&modlinkage)) != 0)
+		return (error);
+
+	zvol_fini();
+	zfs_fini();
+	spa_fini();
+	if (zfs_nfsshare_inited)
+		(void) ddi_modclose(nfs_mod);
+	if (zfs_smbshare_inited)
+		(void) ddi_modclose(smbsrv_mod);
+	if (zfs_nfsshare_inited || zfs_smbshare_inited)
+		(void) ddi_modclose(sharefs_mod);
+
+	tsd_destroy(&zfs_fsyncer_key);
+	ldi_ident_release(zfs_li);
+	zfs_li = NULL;
+	mutex_destroy(&zfs_share_lock);
+
+	return (error);
+}
+
+int
+_info(struct modinfo *modinfop)
+{
+	return (mod_info(&modlinkage, modinfop));
+}
diff --git a/uts/common/fs/zfs/zfs_log.c b/uts/common/fs/zfs/zfs_log.c
new file mode 100644
index 000000000000..26ab78279b31
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_log.c
@@ -0,0 +1,676 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/cmn_err.h>
+#include <sys/kmem.h>
+#include <sys/thread.h>
+#include <sys/file.h>
+#include <sys/vfs.h>
+#include <sys/zfs_znode.h>
+#include <sys/zfs_dir.h>
+#include <sys/zil.h>
+#include <sys/zil_impl.h>
+#include <sys/byteorder.h>
+#include <sys/policy.h>
+#include <sys/stat.h>
+#include <sys/mode.h>
+#include <sys/acl.h>
+#include <sys/dmu.h>
+#include <sys/spa.h>
+#include <sys/zfs_fuid.h>
+#include <sys/ddi.h>
+#include <sys/dsl_dataset.h>
+
+/*
+ * These zfs_log_* functions must be called within a dmu tx, in one
+ * of 2 contexts depending on zilog->z_replay:
+ *
+ * Non replay mode
+ * ---------------
+ * We need to record the transaction so that if it is committed to
+ * the Intent Log then it can be replayed.  An intent log transaction
+ * structure (itx_t) is allocated and all the information necessary to
+ * possibly replay the transaction is saved in it. The itx is then assigned
+ * a sequence number and inserted in the in-memory list anchored in the zilog.
+ *
+ * Replay mode
+ * -----------
+ * We need to mark the intent log record as replayed in the log header.
+ * This is done in the same transaction as the replay so that they
+ * commit atomically.
+ */
+
+int
+zfs_log_create_txtype(zil_create_t type, vsecattr_t *vsecp, vattr_t *vap)
+{
+	int isxvattr = (vap->va_mask & AT_XVATTR);
+	switch (type) {
+	case Z_FILE:
+		if (vsecp == NULL && !isxvattr)
+			return (TX_CREATE);
+		if (vsecp && isxvattr)
+			return (TX_CREATE_ACL_ATTR);
+		if (vsecp)
+			return (TX_CREATE_ACL);
+		else
+			return (TX_CREATE_ATTR);
+		/*NOTREACHED*/
+	case Z_DIR:
+		if (vsecp == NULL && !isxvattr)
+			return (TX_MKDIR);
+		if (vsecp && isxvattr)
+			return (TX_MKDIR_ACL_ATTR);
+		if (vsecp)
+			return (TX_MKDIR_ACL);
+		else
+			return (TX_MKDIR_ATTR);
+	case Z_XATTRDIR:
+		return (TX_MKXATTR);
+	}
+	ASSERT(0);
+	return (TX_MAX_TYPE);
+}
+
+/*
+ * build up the log data necessary for logging xvattr_t
+ * First lr_attr_t is initialized.  following the lr_attr_t
+ * is the mapsize and attribute bitmap copied from the xvattr_t.
+ * Following the bitmap and bitmapsize two 64 bit words are reserved
+ * for the create time which may be set.  Following the create time
+ * records a single 64 bit integer which has the bits to set on
+ * replay for the xvattr.
+ */
+static void
+zfs_log_xvattr(lr_attr_t *lrattr, xvattr_t *xvap)
+{
+	uint32_t	*bitmap;
+	uint64_t	*attrs;
+	uint64_t	*crtime;
+	xoptattr_t	*xoap;
+	void		*scanstamp;
+	int		i;
+
+	xoap = xva_getxoptattr(xvap);
+	ASSERT(xoap);
+
+	lrattr->lr_attr_masksize = xvap->xva_mapsize;
+	bitmap = &lrattr->lr_attr_bitmap;
+	for (i = 0; i != xvap->xva_mapsize; i++, bitmap++) {
+		*bitmap = xvap->xva_reqattrmap[i];
+	}
+
+	/* Now pack the attributes up in a single uint64_t */
+	attrs = (uint64_t *)bitmap;
+	crtime = attrs + 1;
+	scanstamp = (caddr_t)(crtime + 2);
+	*attrs = 0;
+	if (XVA_ISSET_REQ(xvap, XAT_READONLY))
+		*attrs |= (xoap->xoa_readonly == 0) ? 0 :
+		    XAT0_READONLY;
+	if (XVA_ISSET_REQ(xvap, XAT_HIDDEN))
+		*attrs |= (xoap->xoa_hidden == 0) ? 0 :
+		    XAT0_HIDDEN;
+	if (XVA_ISSET_REQ(xvap, XAT_SYSTEM))
+		*attrs |= (xoap->xoa_system == 0) ? 0 :
+		    XAT0_SYSTEM;
+	if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE))
+		*attrs |= (xoap->xoa_archive == 0) ? 0 :
+		    XAT0_ARCHIVE;
+	if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE))
+		*attrs |= (xoap->xoa_immutable == 0) ? 0 :
+		    XAT0_IMMUTABLE;
+	if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK))
+		*attrs |= (xoap->xoa_nounlink == 0) ? 0 :
+		    XAT0_NOUNLINK;
+	if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY))
+		*attrs |= (xoap->xoa_appendonly == 0) ? 0 :
+		    XAT0_APPENDONLY;
+	if (XVA_ISSET_REQ(xvap, XAT_OPAQUE))
+		*attrs |= (xoap->xoa_opaque == 0) ? 0 :
+		    XAT0_APPENDONLY;
+	if (XVA_ISSET_REQ(xvap, XAT_NODUMP))
+		*attrs |= (xoap->xoa_nodump == 0) ? 0 :
+		    XAT0_NODUMP;
+	if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED))
+		*attrs |= (xoap->xoa_av_quarantined == 0) ? 0 :
+		    XAT0_AV_QUARANTINED;
+	if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED))
+		*attrs |= (xoap->xoa_av_modified == 0) ? 0 :
+		    XAT0_AV_MODIFIED;
+	if (XVA_ISSET_REQ(xvap, XAT_CREATETIME))
+		ZFS_TIME_ENCODE(&xoap->xoa_createtime, crtime);
+	if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP))
+		bcopy(xoap->xoa_av_scanstamp, scanstamp, AV_SCANSTAMP_SZ);
+	if (XVA_ISSET_REQ(xvap, XAT_REPARSE))
+		*attrs |= (xoap->xoa_reparse == 0) ? 0 :
+		    XAT0_REPARSE;
+	if (XVA_ISSET_REQ(xvap, XAT_OFFLINE))
+		*attrs |= (xoap->xoa_offline == 0) ? 0 :
+		    XAT0_OFFLINE;
+	if (XVA_ISSET_REQ(xvap, XAT_SPARSE))
+		*attrs |= (xoap->xoa_sparse == 0) ? 0 :
+		    XAT0_SPARSE;
+}
+
+static void *
+zfs_log_fuid_ids(zfs_fuid_info_t *fuidp, void *start)
+{
+	zfs_fuid_t *zfuid;
+	uint64_t *fuidloc = start;
+
+	/* First copy in the ACE FUIDs */
+	for (zfuid = list_head(&fuidp->z_fuids); zfuid;
+	    zfuid = list_next(&fuidp->z_fuids, zfuid)) {
+		*fuidloc++ = zfuid->z_logfuid;
+	}
+	return (fuidloc);
+}
+
+
+static void *
+zfs_log_fuid_domains(zfs_fuid_info_t *fuidp, void *start)
+{
+	zfs_fuid_domain_t *zdomain;
+
+	/* now copy in the domain info, if any */
+	if (fuidp->z_domain_str_sz != 0) {
+		for (zdomain = list_head(&fuidp->z_domains); zdomain;
+		    zdomain = list_next(&fuidp->z_domains, zdomain)) {
+			bcopy((void *)zdomain->z_domain, start,
+			    strlen(zdomain->z_domain) + 1);
+			start = (caddr_t)start +
+			    strlen(zdomain->z_domain) + 1;
+		}
+	}
+	return (start);
+}
+
+/*
+ * zfs_log_create() is used to handle TX_CREATE, TX_CREATE_ATTR, TX_MKDIR,
+ * TX_MKDIR_ATTR and TX_MKXATTR
+ * transactions.
+ *
+ * TX_CREATE and TX_MKDIR are standard creates, but they may have FUID
+ * domain information appended prior to the name.  In this case the
+ * uid/gid in the log record will be a log centric FUID.
+ *
+ * TX_CREATE_ACL_ATTR and TX_MKDIR_ACL_ATTR handle special creates that
+ * may contain attributes, ACL and optional fuid information.
+ *
+ * TX_CREATE_ACL and TX_MKDIR_ACL handle special creates that specify
+ * and ACL and normal users/groups in the ACEs.
+ *
+ * There may be an optional xvattr attribute information similar
+ * to zfs_log_setattr.
+ *
+ * Also, after the file name "domain" strings may be appended.
+ */
+void
+zfs_log_create(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
+    znode_t *dzp, znode_t *zp, char *name, vsecattr_t *vsecp,
+    zfs_fuid_info_t *fuidp, vattr_t *vap)
+{
+	itx_t *itx;
+	lr_create_t *lr;
+	lr_acl_create_t *lracl;
+	size_t aclsize;
+	size_t xvatsize = 0;
+	size_t txsize;
+	xvattr_t *xvap = (xvattr_t *)vap;
+	void *end;
+	size_t lrsize;
+	size_t namesize = strlen(name) + 1;
+	size_t fuidsz = 0;
+
+	if (zil_replaying(zilog, tx))
+		return;
+
+	/*
+	 * If we have FUIDs present then add in space for
+	 * domains and ACE fuid's if any.
+	 */
+	if (fuidp) {
+		fuidsz += fuidp->z_domain_str_sz;
+		fuidsz += fuidp->z_fuid_cnt * sizeof (uint64_t);
+	}
+
+	if (vap->va_mask & AT_XVATTR)
+		xvatsize = ZIL_XVAT_SIZE(xvap->xva_mapsize);
+
+	if ((int)txtype == TX_CREATE_ATTR || (int)txtype == TX_MKDIR_ATTR ||
+	    (int)txtype == TX_CREATE || (int)txtype == TX_MKDIR ||
+	    (int)txtype == TX_MKXATTR) {
+		txsize = sizeof (*lr) + namesize + fuidsz + xvatsize;
+		lrsize = sizeof (*lr);
+	} else {
+		aclsize = (vsecp) ? vsecp->vsa_aclentsz : 0;
+		txsize =
+		    sizeof (lr_acl_create_t) + namesize + fuidsz +
+		    ZIL_ACE_LENGTH(aclsize) + xvatsize;
+		lrsize = sizeof (lr_acl_create_t);
+	}
+
+	itx = zil_itx_create(txtype, txsize);
+
+	lr = (lr_create_t *)&itx->itx_lr;
+	lr->lr_doid = dzp->z_id;
+	lr->lr_foid = zp->z_id;
+	lr->lr_mode = zp->z_mode;
+	if (!IS_EPHEMERAL(zp->z_uid)) {
+		lr->lr_uid = (uint64_t)zp->z_uid;
+	} else {
+		lr->lr_uid = fuidp->z_fuid_owner;
+	}
+	if (!IS_EPHEMERAL(zp->z_gid)) {
+		lr->lr_gid = (uint64_t)zp->z_gid;
+	} else {
+		lr->lr_gid = fuidp->z_fuid_group;
+	}
+	(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zp->z_zfsvfs), &lr->lr_gen,
+	    sizeof (uint64_t));
+	(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_CRTIME(zp->z_zfsvfs),
+	    lr->lr_crtime, sizeof (uint64_t) * 2);
+
+	if (sa_lookup(zp->z_sa_hdl, SA_ZPL_RDEV(zp->z_zfsvfs), &lr->lr_rdev,
+	    sizeof (lr->lr_rdev)) != 0)
+		lr->lr_rdev = 0;
+
+	/*
+	 * Fill in xvattr info if any
+	 */
+	if (vap->va_mask & AT_XVATTR) {
+		zfs_log_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), xvap);
+		end = (caddr_t)lr + lrsize + xvatsize;
+	} else {
+		end = (caddr_t)lr + lrsize;
+	}
+
+	/* Now fill in any ACL info */
+
+	if (vsecp) {
+		lracl = (lr_acl_create_t *)&itx->itx_lr;
+		lracl->lr_aclcnt = vsecp->vsa_aclcnt;
+		lracl->lr_acl_bytes = aclsize;
+		lracl->lr_domcnt = fuidp ? fuidp->z_domain_cnt : 0;
+		lracl->lr_fuidcnt  = fuidp ? fuidp->z_fuid_cnt : 0;
+		if (vsecp->vsa_aclflags & VSA_ACE_ACLFLAGS)
+			lracl->lr_acl_flags = (uint64_t)vsecp->vsa_aclflags;
+		else
+			lracl->lr_acl_flags = 0;
+
+		bcopy(vsecp->vsa_aclentp, end, aclsize);
+		end = (caddr_t)end + ZIL_ACE_LENGTH(aclsize);
+	}
+
+	/* drop in FUID info */
+	if (fuidp) {
+		end = zfs_log_fuid_ids(fuidp, end);
+		end = zfs_log_fuid_domains(fuidp, end);
+	}
+	/*
+	 * Now place file name in log record
+	 */
+	bcopy(name, end, namesize);
+
+	zil_itx_assign(zilog, itx, tx);
+}
+
+/*
+ * zfs_log_remove() handles both TX_REMOVE and TX_RMDIR transactions.
+ */
+void
+zfs_log_remove(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
+	znode_t *dzp, char *name, uint64_t foid)
+{
+	itx_t *itx;
+	lr_remove_t *lr;
+	size_t namesize = strlen(name) + 1;
+
+	if (zil_replaying(zilog, tx))
+		return;
+
+	itx = zil_itx_create(txtype, sizeof (*lr) + namesize);
+	lr = (lr_remove_t *)&itx->itx_lr;
+	lr->lr_doid = dzp->z_id;
+	bcopy(name, (char *)(lr + 1), namesize);
+
+	itx->itx_oid = foid;
+
+	zil_itx_assign(zilog, itx, tx);
+}
+
+/*
+ * zfs_log_link() handles TX_LINK transactions.
+ */
+void
+zfs_log_link(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
+	znode_t *dzp, znode_t *zp, char *name)
+{
+	itx_t *itx;
+	lr_link_t *lr;
+	size_t namesize = strlen(name) + 1;
+
+	if (zil_replaying(zilog, tx))
+		return;
+
+	itx = zil_itx_create(txtype, sizeof (*lr) + namesize);
+	lr = (lr_link_t *)&itx->itx_lr;
+	lr->lr_doid = dzp->z_id;
+	lr->lr_link_obj = zp->z_id;
+	bcopy(name, (char *)(lr + 1), namesize);
+
+	zil_itx_assign(zilog, itx, tx);
+}
+
+/*
+ * zfs_log_symlink() handles TX_SYMLINK transactions.
+ */
+void
+zfs_log_symlink(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
+    znode_t *dzp, znode_t *zp, char *name, char *link)
+{
+	itx_t *itx;
+	lr_create_t *lr;
+	size_t namesize = strlen(name) + 1;
+	size_t linksize = strlen(link) + 1;
+
+	if (zil_replaying(zilog, tx))
+		return;
+
+	itx = zil_itx_create(txtype, sizeof (*lr) + namesize + linksize);
+	lr = (lr_create_t *)&itx->itx_lr;
+	lr->lr_doid = dzp->z_id;
+	lr->lr_foid = zp->z_id;
+	lr->lr_uid = zp->z_uid;
+	lr->lr_gid = zp->z_gid;
+	lr->lr_mode = zp->z_mode;
+	(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zp->z_zfsvfs), &lr->lr_gen,
+	    sizeof (uint64_t));
+	(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_CRTIME(zp->z_zfsvfs),
+	    lr->lr_crtime, sizeof (uint64_t) * 2);
+	bcopy(name, (char *)(lr + 1), namesize);
+	bcopy(link, (char *)(lr + 1) + namesize, linksize);
+
+	zil_itx_assign(zilog, itx, tx);
+}
+
+/*
+ * zfs_log_rename() handles TX_RENAME transactions.
+ */
+void
+zfs_log_rename(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
+	znode_t *sdzp, char *sname, znode_t *tdzp, char *dname, znode_t *szp)
+{
+	itx_t *itx;
+	lr_rename_t *lr;
+	size_t snamesize = strlen(sname) + 1;
+	size_t dnamesize = strlen(dname) + 1;
+
+	if (zil_replaying(zilog, tx))
+		return;
+
+	itx = zil_itx_create(txtype, sizeof (*lr) + snamesize + dnamesize);
+	lr = (lr_rename_t *)&itx->itx_lr;
+	lr->lr_sdoid = sdzp->z_id;
+	lr->lr_tdoid = tdzp->z_id;
+	bcopy(sname, (char *)(lr + 1), snamesize);
+	bcopy(dname, (char *)(lr + 1) + snamesize, dnamesize);
+	itx->itx_oid = szp->z_id;
+
+	zil_itx_assign(zilog, itx, tx);
+}
+
+/*
+ * zfs_log_write() handles TX_WRITE transactions.
+ */
+ssize_t zfs_immediate_write_sz = 32768;
+
+void
+zfs_log_write(zilog_t *zilog, dmu_tx_t *tx, int txtype,
+	znode_t *zp, offset_t off, ssize_t resid, int ioflag)
+{
+	itx_wr_state_t write_state;
+	boolean_t slogging;
+	uintptr_t fsync_cnt;
+	ssize_t immediate_write_sz;
+
+	if (zil_replaying(zilog, tx) || zp->z_unlinked)
+		return;
+
+	immediate_write_sz = (zilog->zl_logbias == ZFS_LOGBIAS_THROUGHPUT)
+	    ? 0 : zfs_immediate_write_sz;
+
+	slogging = spa_has_slogs(zilog->zl_spa) &&
+	    (zilog->zl_logbias == ZFS_LOGBIAS_LATENCY);
+	if (resid > immediate_write_sz && !slogging && resid <= zp->z_blksz)
+		write_state = WR_INDIRECT;
+	else if (ioflag & (FSYNC | FDSYNC))
+		write_state = WR_COPIED;
+	else
+		write_state = WR_NEED_COPY;
+
+	if ((fsync_cnt = (uintptr_t)tsd_get(zfs_fsyncer_key)) != 0) {
+		(void) tsd_set(zfs_fsyncer_key, (void *)(fsync_cnt - 1));
+	}
+
+	while (resid) {
+		itx_t *itx;
+		lr_write_t *lr;
+		ssize_t len;
+
+		/*
+		 * If the write would overflow the largest block then split it.
+		 */
+		if (write_state != WR_INDIRECT && resid > ZIL_MAX_LOG_DATA)
+			len = SPA_MAXBLOCKSIZE >> 1;
+		else
+			len = resid;
+
+		itx = zil_itx_create(txtype, sizeof (*lr) +
+		    (write_state == WR_COPIED ? len : 0));
+		lr = (lr_write_t *)&itx->itx_lr;
+		if (write_state == WR_COPIED && dmu_read(zp->z_zfsvfs->z_os,
+		    zp->z_id, off, len, lr + 1, DMU_READ_NO_PREFETCH) != 0) {
+			zil_itx_destroy(itx);
+			itx = zil_itx_create(txtype, sizeof (*lr));
+			lr = (lr_write_t *)&itx->itx_lr;
+			write_state = WR_NEED_COPY;
+		}
+
+		itx->itx_wr_state = write_state;
+		if (write_state == WR_NEED_COPY)
+			itx->itx_sod += len;
+		lr->lr_foid = zp->z_id;
+		lr->lr_offset = off;
+		lr->lr_length = len;
+		lr->lr_blkoff = 0;
+		BP_ZERO(&lr->lr_blkptr);
+
+		itx->itx_private = zp->z_zfsvfs;
+
+		if (!(ioflag & (FSYNC | FDSYNC)) && (zp->z_sync_cnt == 0) &&
+		    (fsync_cnt == 0))
+			itx->itx_sync = B_FALSE;
+
+		zil_itx_assign(zilog, itx, tx);
+
+		off += len;
+		resid -= len;
+	}
+}
+
+/*
+ * zfs_log_truncate() handles TX_TRUNCATE transactions.
+ */
+void
+zfs_log_truncate(zilog_t *zilog, dmu_tx_t *tx, int txtype,
+	znode_t *zp, uint64_t off, uint64_t len)
+{
+	itx_t *itx;
+	lr_truncate_t *lr;
+
+	if (zil_replaying(zilog, tx) || zp->z_unlinked)
+		return;
+
+	itx = zil_itx_create(txtype, sizeof (*lr));
+	lr = (lr_truncate_t *)&itx->itx_lr;
+	lr->lr_foid = zp->z_id;
+	lr->lr_offset = off;
+	lr->lr_length = len;
+
+	itx->itx_sync = (zp->z_sync_cnt != 0);
+	zil_itx_assign(zilog, itx, tx);
+}
+
+/*
+ * zfs_log_setattr() handles TX_SETATTR transactions.
+ */
+void
+zfs_log_setattr(zilog_t *zilog, dmu_tx_t *tx, int txtype,
+	znode_t *zp, vattr_t *vap, uint_t mask_applied, zfs_fuid_info_t *fuidp)
+{
+	itx_t		*itx;
+	lr_setattr_t	*lr;
+	xvattr_t	*xvap = (xvattr_t *)vap;
+	size_t		recsize = sizeof (lr_setattr_t);
+	void		*start;
+
+	if (zil_replaying(zilog, tx) || zp->z_unlinked)
+		return;
+
+	/*
+	 * If XVATTR set, then log record size needs to allow
+	 * for lr_attr_t + xvattr mask, mapsize and create time
+	 * plus actual attribute values
+	 */
+	if (vap->va_mask & AT_XVATTR)
+		recsize = sizeof (*lr) + ZIL_XVAT_SIZE(xvap->xva_mapsize);
+
+	if (fuidp)
+		recsize += fuidp->z_domain_str_sz;
+
+	itx = zil_itx_create(txtype, recsize);
+	lr = (lr_setattr_t *)&itx->itx_lr;
+	lr->lr_foid = zp->z_id;
+	lr->lr_mask = (uint64_t)mask_applied;
+	lr->lr_mode = (uint64_t)vap->va_mode;
+	if ((mask_applied & AT_UID) && IS_EPHEMERAL(vap->va_uid))
+		lr->lr_uid = fuidp->z_fuid_owner;
+	else
+		lr->lr_uid = (uint64_t)vap->va_uid;
+
+	if ((mask_applied & AT_GID) && IS_EPHEMERAL(vap->va_gid))
+		lr->lr_gid = fuidp->z_fuid_group;
+	else
+		lr->lr_gid = (uint64_t)vap->va_gid;
+
+	lr->lr_size = (uint64_t)vap->va_size;
+	ZFS_TIME_ENCODE(&vap->va_atime, lr->lr_atime);
+	ZFS_TIME_ENCODE(&vap->va_mtime, lr->lr_mtime);
+	start = (lr_setattr_t *)(lr + 1);
+	if (vap->va_mask & AT_XVATTR) {
+		zfs_log_xvattr((lr_attr_t *)start, xvap);
+		start = (caddr_t)start + ZIL_XVAT_SIZE(xvap->xva_mapsize);
+	}
+
+	/*
+	 * Now stick on domain information if any on end
+	 */
+
+	if (fuidp)
+		(void) zfs_log_fuid_domains(fuidp, start);
+
+	itx->itx_sync = (zp->z_sync_cnt != 0);
+	zil_itx_assign(zilog, itx, tx);
+}
+
+/*
+ * zfs_log_acl() handles TX_ACL transactions.
+ */
+void
+zfs_log_acl(zilog_t *zilog, dmu_tx_t *tx, znode_t *zp,
+    vsecattr_t *vsecp, zfs_fuid_info_t *fuidp)
+{
+	itx_t *itx;
+	lr_acl_v0_t *lrv0;
+	lr_acl_t *lr;
+	int txtype;
+	int lrsize;
+	size_t txsize;
+	size_t aclbytes = vsecp->vsa_aclentsz;
+
+	if (zil_replaying(zilog, tx) || zp->z_unlinked)
+		return;
+
+	txtype = (zp->z_zfsvfs->z_version < ZPL_VERSION_FUID) ?
+	    TX_ACL_V0 : TX_ACL;
+
+	if (txtype == TX_ACL)
+		lrsize = sizeof (*lr);
+	else
+		lrsize = sizeof (*lrv0);
+
+	txsize = lrsize +
+	    ((txtype == TX_ACL) ? ZIL_ACE_LENGTH(aclbytes) : aclbytes) +
+	    (fuidp ? fuidp->z_domain_str_sz : 0) +
+	    sizeof (uint64_t) * (fuidp ? fuidp->z_fuid_cnt : 0);
+
+	itx = zil_itx_create(txtype, txsize);
+
+	lr = (lr_acl_t *)&itx->itx_lr;
+	lr->lr_foid = zp->z_id;
+	if (txtype == TX_ACL) {
+		lr->lr_acl_bytes = aclbytes;
+		lr->lr_domcnt = fuidp ? fuidp->z_domain_cnt : 0;
+		lr->lr_fuidcnt = fuidp ? fuidp->z_fuid_cnt : 0;
+		if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS)
+			lr->lr_acl_flags = (uint64_t)vsecp->vsa_aclflags;
+		else
+			lr->lr_acl_flags = 0;
+	}
+	lr->lr_aclcnt = (uint64_t)vsecp->vsa_aclcnt;
+
+	if (txtype == TX_ACL_V0) {
+		lrv0 = (lr_acl_v0_t *)lr;
+		bcopy(vsecp->vsa_aclentp, (ace_t *)(lrv0 + 1), aclbytes);
+	} else {
+		void *start = (ace_t *)(lr + 1);
+
+		bcopy(vsecp->vsa_aclentp, start, aclbytes);
+
+		start = (caddr_t)start + ZIL_ACE_LENGTH(aclbytes);
+
+		if (fuidp) {
+			start = zfs_log_fuid_ids(fuidp, start);
+			(void) zfs_log_fuid_domains(fuidp, start);
+		}
+	}
+
+	itx->itx_sync = (zp->z_sync_cnt != 0);
+	zil_itx_assign(zilog, itx, tx);
+}
diff --git a/uts/common/fs/zfs/zfs_onexit.c b/uts/common/fs/zfs/zfs_onexit.c
new file mode 100644
index 000000000000..9706de2b42c2
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_onexit.c
@@ -0,0 +1,246 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/open.h>
+#include <sys/kmem.h>
+#include <sys/conf.h>
+#include <sys/ddi.h>
+#include <sys/sunddi.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/mkdev.h>
+#include <sys/zfs_onexit.h>
+#include <sys/zvol.h>
+
+/*
+ * ZFS kernel routines may add/delete callback routines to be invoked
+ * upon process exit (triggered via the close operation from the /dev/zfs
+ * driver).
+ *
+ * These cleanup callbacks are intended to allow for the accumulation
+ * of kernel state across multiple ioctls.  User processes participate
+ * by opening ZFS_DEV with O_EXCL. This causes the ZFS driver to do a
+ * clone-open, generating a unique minor number. The process then passes
+ * along that file descriptor to each ioctl that might have a cleanup operation.
+ *
+ * Consumers of the onexit routines should call zfs_onexit_fd_hold() early
+ * on to validate the given fd and add a reference to its file table entry.
+ * This allows the consumer to do its work and then add a callback, knowing
+ * that zfs_onexit_add_cb() won't fail with EBADF.  When finished, consumers
+ * should call zfs_onexit_fd_rele().
+ *
+ * A simple example is zfs_ioc_recv(), where we might create an AVL tree
+ * with dataset/GUID mappings and then reuse that tree on subsequent
+ * zfs_ioc_recv() calls.
+ *
+ * On the first zfs_ioc_recv() call, dmu_recv_stream() will kmem_alloc()
+ * the AVL tree and pass it along with a callback function to
+ * zfs_onexit_add_cb(). The zfs_onexit_add_cb() routine will register the
+ * callback and return an action handle.
+ *
+ * The action handle is then passed from user space to subsequent
+ * zfs_ioc_recv() calls, so that dmu_recv_stream() can fetch its AVL tree
+ * by calling zfs_onexit_cb_data() with the device minor number and
+ * action handle.
+ *
+ * If the user process exits abnormally, the callback is invoked implicitly
+ * as part of the driver close operation.  Once the user space process is
+ * finished with the accumulated kernel state, it can also just call close(2)
+ * on the cleanup fd to trigger the cleanup callback.
+ */
+
+void
+zfs_onexit_init(zfs_onexit_t **zop)
+{
+	zfs_onexit_t *zo;
+
+	zo = *zop = kmem_zalloc(sizeof (zfs_onexit_t), KM_SLEEP);
+	mutex_init(&zo->zo_lock, NULL, MUTEX_DEFAULT, NULL);
+	list_create(&zo->zo_actions, sizeof (zfs_onexit_action_node_t),
+	    offsetof(zfs_onexit_action_node_t, za_link));
+}
+
+void
+zfs_onexit_destroy(zfs_onexit_t *zo)
+{
+	zfs_onexit_action_node_t *ap;
+
+	mutex_enter(&zo->zo_lock);
+	while ((ap = list_head(&zo->zo_actions)) != NULL) {
+		list_remove(&zo->zo_actions, ap);
+		mutex_exit(&zo->zo_lock);
+		ap->za_func(ap->za_data);
+		kmem_free(ap, sizeof (zfs_onexit_action_node_t));
+		mutex_enter(&zo->zo_lock);
+	}
+	mutex_exit(&zo->zo_lock);
+
+	list_destroy(&zo->zo_actions);
+	mutex_destroy(&zo->zo_lock);
+	kmem_free(zo, sizeof (zfs_onexit_t));
+}
+
+static int
+zfs_onexit_minor_to_state(minor_t minor, zfs_onexit_t **zo)
+{
+	*zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
+	if (*zo == NULL)
+		return (EBADF);
+
+	return (0);
+}
+
+/*
+ * Consumers might need to operate by minor number instead of fd, since
+ * they might be running in another thread (e.g. txg_sync_thread). Callers
+ * of this function must call zfs_onexit_fd_rele() when they're finished
+ * using the minor number.
+ */
+int
+zfs_onexit_fd_hold(int fd, minor_t *minorp)
+{
+	file_t *fp;
+	zfs_onexit_t *zo;
+
+	fp = getf(fd);
+	if (fp == NULL)
+		return (EBADF);
+
+	*minorp = getminor(fp->f_vnode->v_rdev);
+	return (zfs_onexit_minor_to_state(*minorp, &zo));
+}
+
+void
+zfs_onexit_fd_rele(int fd)
+{
+	releasef(fd);
+}
+
+/*
+ * Add a callback to be invoked when the calling process exits.
+ */
+int
+zfs_onexit_add_cb(minor_t minor, void (*func)(void *), void *data,
+    uint64_t *action_handle)
+{
+	zfs_onexit_t *zo;
+	zfs_onexit_action_node_t *ap;
+	int error;
+
+	error = zfs_onexit_minor_to_state(minor, &zo);
+	if (error)
+		return (error);
+
+	ap = kmem_alloc(sizeof (zfs_onexit_action_node_t), KM_SLEEP);
+	list_link_init(&ap->za_link);
+	ap->za_func = func;
+	ap->za_data = data;
+
+	mutex_enter(&zo->zo_lock);
+	list_insert_tail(&zo->zo_actions, ap);
+	mutex_exit(&zo->zo_lock);
+	if (action_handle)
+		*action_handle = (uint64_t)(uintptr_t)ap;
+
+	return (0);
+}
+
+static zfs_onexit_action_node_t *
+zfs_onexit_find_cb(zfs_onexit_t *zo, uint64_t action_handle)
+{
+	zfs_onexit_action_node_t *match;
+	zfs_onexit_action_node_t *ap;
+	list_t *l;
+
+	ASSERT(MUTEX_HELD(&zo->zo_lock));
+
+	match = (zfs_onexit_action_node_t *)(uintptr_t)action_handle;
+	l = &zo->zo_actions;
+	for (ap = list_head(l); ap != NULL; ap = list_next(l, ap)) {
+		if (match == ap)
+			break;
+	}
+	return (ap);
+}
+
+/*
+ * Delete the callback, triggering it first if 'fire' is set.
+ */
+int
+zfs_onexit_del_cb(minor_t minor, uint64_t action_handle, boolean_t fire)
+{
+	zfs_onexit_t *zo;
+	zfs_onexit_action_node_t *ap;
+	int error;
+
+	error = zfs_onexit_minor_to_state(minor, &zo);
+	if (error)
+		return (error);
+
+	mutex_enter(&zo->zo_lock);
+	ap = zfs_onexit_find_cb(zo, action_handle);
+	if (ap != NULL) {
+		list_remove(&zo->zo_actions, ap);
+		mutex_exit(&zo->zo_lock);
+		if (fire)
+			ap->za_func(ap->za_data);
+		kmem_free(ap, sizeof (zfs_onexit_action_node_t));
+	} else {
+		mutex_exit(&zo->zo_lock);
+		error = ENOENT;
+	}
+
+	return (error);
+}
+
+/*
+ * Return the data associated with this callback.  This allows consumers
+ * of the cleanup-on-exit interfaces to stash kernel data across system
+ * calls, knowing that it will be cleaned up if the calling process exits.
+ */
+int
+zfs_onexit_cb_data(minor_t minor, uint64_t action_handle, void **data)
+{
+	zfs_onexit_t *zo;
+	zfs_onexit_action_node_t *ap;
+	int error;
+
+	*data = NULL;
+
+	error = zfs_onexit_minor_to_state(minor, &zo);
+	if (error)
+		return (error);
+
+	mutex_enter(&zo->zo_lock);
+	ap = zfs_onexit_find_cb(zo, action_handle);
+	if (ap != NULL)
+		*data = ap->za_data;
+	else
+		error = ENOENT;
+	mutex_exit(&zo->zo_lock);
+
+	return (error);
+}
diff --git a/uts/common/fs/zfs/zfs_replay.c b/uts/common/fs/zfs/zfs_replay.c
new file mode 100644
index 000000000000..9fb336856990
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_replay.c
@@ -0,0 +1,931 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/cmn_err.h>
+#include <sys/kmem.h>
+#include <sys/thread.h>
+#include <sys/file.h>
+#include <sys/fcntl.h>
+#include <sys/vfs.h>
+#include <sys/fs/zfs.h>
+#include <sys/zfs_znode.h>
+#include <sys/zfs_dir.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_fuid.h>
+#include <sys/spa.h>
+#include <sys/zil.h>
+#include <sys/byteorder.h>
+#include <sys/stat.h>
+#include <sys/mode.h>
+#include <sys/acl.h>
+#include <sys/atomic.h>
+#include <sys/cred.h>
+
+/*
+ * Functions to replay ZFS intent log (ZIL) records
+ * The functions are called through a function vector (zfs_replay_vector)
+ * which is indexed by the transaction type.
+ */
+
+static void
+zfs_init_vattr(vattr_t *vap, uint64_t mask, uint64_t mode,
+	uint64_t uid, uint64_t gid, uint64_t rdev, uint64_t nodeid)
+{
+	bzero(vap, sizeof (*vap));
+	vap->va_mask = (uint_t)mask;
+	vap->va_type = IFTOVT(mode);
+	vap->va_mode = mode & MODEMASK;
+	vap->va_uid = (uid_t)(IS_EPHEMERAL(uid)) ? -1 : uid;
+	vap->va_gid = (gid_t)(IS_EPHEMERAL(gid)) ? -1 : gid;
+	vap->va_rdev = zfs_cmpldev(rdev);
+	vap->va_nodeid = nodeid;
+}
+
+/* ARGSUSED */
+static int
+zfs_replay_error(zfsvfs_t *zfsvfs, lr_t *lr, boolean_t byteswap)
+{
+	return (ENOTSUP);
+}
+
+static void
+zfs_replay_xvattr(lr_attr_t *lrattr, xvattr_t *xvap)
+{
+	xoptattr_t *xoap = NULL;
+	uint64_t *attrs;
+	uint64_t *crtime;
+	uint32_t *bitmap;
+	void *scanstamp;
+	int i;
+
+	xvap->xva_vattr.va_mask |= AT_XVATTR;
+	if ((xoap = xva_getxoptattr(xvap)) == NULL) {
+		xvap->xva_vattr.va_mask &= ~AT_XVATTR; /* shouldn't happen */
+		return;
+	}
+
+	ASSERT(lrattr->lr_attr_masksize == xvap->xva_mapsize);
+
+	bitmap = &lrattr->lr_attr_bitmap;
+	for (i = 0; i != lrattr->lr_attr_masksize; i++, bitmap++)
+		xvap->xva_reqattrmap[i] = *bitmap;
+
+	attrs = (uint64_t *)(lrattr + lrattr->lr_attr_masksize - 1);
+	crtime = attrs + 1;
+	scanstamp = (caddr_t)(crtime + 2);
+
+	if (XVA_ISSET_REQ(xvap, XAT_HIDDEN))
+		xoap->xoa_hidden = ((*attrs & XAT0_HIDDEN) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_SYSTEM))
+		xoap->xoa_system = ((*attrs & XAT0_SYSTEM) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE))
+		xoap->xoa_archive = ((*attrs & XAT0_ARCHIVE) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_READONLY))
+		xoap->xoa_readonly = ((*attrs & XAT0_READONLY) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE))
+		xoap->xoa_immutable = ((*attrs & XAT0_IMMUTABLE) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK))
+		xoap->xoa_nounlink = ((*attrs & XAT0_NOUNLINK) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY))
+		xoap->xoa_appendonly = ((*attrs & XAT0_APPENDONLY) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_NODUMP))
+		xoap->xoa_nodump = ((*attrs & XAT0_NODUMP) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_OPAQUE))
+		xoap->xoa_opaque = ((*attrs & XAT0_OPAQUE) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED))
+		xoap->xoa_av_modified = ((*attrs & XAT0_AV_MODIFIED) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED))
+		xoap->xoa_av_quarantined =
+		    ((*attrs & XAT0_AV_QUARANTINED) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_CREATETIME))
+		ZFS_TIME_DECODE(&xoap->xoa_createtime, crtime);
+	if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP))
+		bcopy(scanstamp, xoap->xoa_av_scanstamp, AV_SCANSTAMP_SZ);
+	if (XVA_ISSET_REQ(xvap, XAT_REPARSE))
+		xoap->xoa_reparse = ((*attrs & XAT0_REPARSE) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_OFFLINE))
+		xoap->xoa_offline = ((*attrs & XAT0_OFFLINE) != 0);
+	if (XVA_ISSET_REQ(xvap, XAT_SPARSE))
+		xoap->xoa_sparse = ((*attrs & XAT0_SPARSE) != 0);
+}
+
+static int
+zfs_replay_domain_cnt(uint64_t uid, uint64_t gid)
+{
+	uint64_t uid_idx;
+	uint64_t gid_idx;
+	int domcnt = 0;
+
+	uid_idx = FUID_INDEX(uid);
+	gid_idx = FUID_INDEX(gid);
+	if (uid_idx)
+		domcnt++;
+	if (gid_idx > 0 && gid_idx != uid_idx)
+		domcnt++;
+
+	return (domcnt);
+}
+
+static void *
+zfs_replay_fuid_domain_common(zfs_fuid_info_t *fuid_infop, void *start,
+    int domcnt)
+{
+	int i;
+
+	for (i = 0; i != domcnt; i++) {
+		fuid_infop->z_domain_table[i] = start;
+		start = (caddr_t)start + strlen(start) + 1;
+	}
+
+	return (start);
+}
+
+/*
+ * Set the uid/gid in the fuid_info structure.
+ */
+static void
+zfs_replay_fuid_ugid(zfs_fuid_info_t *fuid_infop, uint64_t uid, uint64_t gid)
+{
+	/*
+	 * If owner or group are log specific FUIDs then slurp up
+	 * domain information and build zfs_fuid_info_t
+	 */
+	if (IS_EPHEMERAL(uid))
+		fuid_infop->z_fuid_owner = uid;
+
+	if (IS_EPHEMERAL(gid))
+		fuid_infop->z_fuid_group = gid;
+}
+
+/*
+ * Load fuid domains into fuid_info_t
+ */
+static zfs_fuid_info_t *
+zfs_replay_fuid_domain(void *buf, void **end, uint64_t uid, uint64_t gid)
+{
+	int domcnt;
+
+	zfs_fuid_info_t *fuid_infop;
+
+	fuid_infop = zfs_fuid_info_alloc();
+
+	domcnt = zfs_replay_domain_cnt(uid, gid);
+
+	if (domcnt == 0)
+		return (fuid_infop);
+
+	fuid_infop->z_domain_table =
+	    kmem_zalloc(domcnt * sizeof (char **), KM_SLEEP);
+
+	zfs_replay_fuid_ugid(fuid_infop, uid, gid);
+
+	fuid_infop->z_domain_cnt = domcnt;
+	*end = zfs_replay_fuid_domain_common(fuid_infop, buf, domcnt);
+	return (fuid_infop);
+}
+
+/*
+ * load zfs_fuid_t's and fuid_domains into fuid_info_t
+ */
+static zfs_fuid_info_t *
+zfs_replay_fuids(void *start, void **end, int idcnt, int domcnt, uint64_t uid,
+    uint64_t gid)
+{
+	uint64_t *log_fuid = (uint64_t *)start;
+	zfs_fuid_info_t *fuid_infop;
+	int i;
+
+	fuid_infop = zfs_fuid_info_alloc();
+	fuid_infop->z_domain_cnt = domcnt;
+
+	fuid_infop->z_domain_table =
+	    kmem_zalloc(domcnt * sizeof (char **), KM_SLEEP);
+
+	for (i = 0; i != idcnt; i++) {
+		zfs_fuid_t *zfuid;
+
+		zfuid = kmem_alloc(sizeof (zfs_fuid_t), KM_SLEEP);
+		zfuid->z_logfuid = *log_fuid;
+		zfuid->z_id = -1;
+		zfuid->z_domidx = 0;
+		list_insert_tail(&fuid_infop->z_fuids, zfuid);
+		log_fuid++;
+	}
+
+	zfs_replay_fuid_ugid(fuid_infop, uid, gid);
+
+	*end = zfs_replay_fuid_domain_common(fuid_infop, log_fuid, domcnt);
+	return (fuid_infop);
+}
+
+static void
+zfs_replay_swap_attrs(lr_attr_t *lrattr)
+{
+	/* swap the lr_attr structure */
+	byteswap_uint32_array(lrattr, sizeof (*lrattr));
+	/* swap the bitmap */
+	byteswap_uint32_array(lrattr + 1, (lrattr->lr_attr_masksize - 1) *
+	    sizeof (uint32_t));
+	/* swap the attributes, create time + 64 bit word for attributes */
+	byteswap_uint64_array((caddr_t)(lrattr + 1) + (sizeof (uint32_t) *
+	    (lrattr->lr_attr_masksize - 1)), 3 * sizeof (uint64_t));
+}
+
+/*
+ * Replay file create with optional ACL, xvattr information as well
+ * as option FUID information.
+ */
+static int
+zfs_replay_create_acl(zfsvfs_t *zfsvfs,
+    lr_acl_create_t *lracl, boolean_t byteswap)
+{
+	char *name = NULL;		/* location determined later */
+	lr_create_t *lr = (lr_create_t *)lracl;
+	znode_t *dzp;
+	vnode_t *vp = NULL;
+	xvattr_t xva;
+	int vflg = 0;
+	vsecattr_t vsec = { 0 };
+	lr_attr_t *lrattr;
+	void *aclstart;
+	void *fuidstart;
+	size_t xvatlen = 0;
+	uint64_t txtype;
+	int error;
+
+	txtype = (lr->lr_common.lrc_txtype & ~TX_CI);
+	if (byteswap) {
+		byteswap_uint64_array(lracl, sizeof (*lracl));
+		if (txtype == TX_CREATE_ACL_ATTR ||
+		    txtype == TX_MKDIR_ACL_ATTR) {
+			lrattr = (lr_attr_t *)(caddr_t)(lracl + 1);
+			zfs_replay_swap_attrs(lrattr);
+			xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
+		}
+
+		aclstart = (caddr_t)(lracl + 1) + xvatlen;
+		zfs_ace_byteswap(aclstart, lracl->lr_acl_bytes, B_FALSE);
+		/* swap fuids */
+		if (lracl->lr_fuidcnt) {
+			byteswap_uint64_array((caddr_t)aclstart +
+			    ZIL_ACE_LENGTH(lracl->lr_acl_bytes),
+			    lracl->lr_fuidcnt * sizeof (uint64_t));
+		}
+	}
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0)
+		return (error);
+
+	xva_init(&xva);
+	zfs_init_vattr(&xva.xva_vattr, AT_TYPE | AT_MODE | AT_UID | AT_GID,
+	    lr->lr_mode, lr->lr_uid, lr->lr_gid, lr->lr_rdev, lr->lr_foid);
+
+	/*
+	 * All forms of zfs create (create, mkdir, mkxattrdir, symlink)
+	 * eventually end up in zfs_mknode(), which assigns the object's
+	 * creation time and generation number.  The generic VOP_CREATE()
+	 * doesn't have either concept, so we smuggle the values inside
+	 * the vattr's otherwise unused va_ctime and va_nblocks fields.
+	 */
+	ZFS_TIME_DECODE(&xva.xva_vattr.va_ctime, lr->lr_crtime);
+	xva.xva_vattr.va_nblocks = lr->lr_gen;
+
+	error = dmu_object_info(zfsvfs->z_os, lr->lr_foid, NULL);
+	if (error != ENOENT)
+		goto bail;
+
+	if (lr->lr_common.lrc_txtype & TX_CI)
+		vflg |= FIGNORECASE;
+	switch (txtype) {
+	case TX_CREATE_ACL:
+		aclstart = (caddr_t)(lracl + 1);
+		fuidstart = (caddr_t)aclstart +
+		    ZIL_ACE_LENGTH(lracl->lr_acl_bytes);
+		zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart,
+		    (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt,
+		    lr->lr_uid, lr->lr_gid);
+		/*FALLTHROUGH*/
+	case TX_CREATE_ACL_ATTR:
+		if (name == NULL) {
+			lrattr = (lr_attr_t *)(caddr_t)(lracl + 1);
+			xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
+			xva.xva_vattr.va_mask |= AT_XVATTR;
+			zfs_replay_xvattr(lrattr, &xva);
+		}
+		vsec.vsa_mask = VSA_ACE | VSA_ACE_ACLFLAGS;
+		vsec.vsa_aclentp = (caddr_t)(lracl + 1) + xvatlen;
+		vsec.vsa_aclcnt = lracl->lr_aclcnt;
+		vsec.vsa_aclentsz = lracl->lr_acl_bytes;
+		vsec.vsa_aclflags = lracl->lr_acl_flags;
+		if (zfsvfs->z_fuid_replay == NULL) {
+			fuidstart = (caddr_t)(lracl + 1) + xvatlen +
+			    ZIL_ACE_LENGTH(lracl->lr_acl_bytes);
+			zfsvfs->z_fuid_replay =
+			    zfs_replay_fuids(fuidstart,
+			    (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt,
+			    lr->lr_uid, lr->lr_gid);
+		}
+
+		error = VOP_CREATE(ZTOV(dzp), name, &xva.xva_vattr,
+		    0, 0, &vp, kcred, vflg, NULL, &vsec);
+		break;
+	case TX_MKDIR_ACL:
+		aclstart = (caddr_t)(lracl + 1);
+		fuidstart = (caddr_t)aclstart +
+		    ZIL_ACE_LENGTH(lracl->lr_acl_bytes);
+		zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart,
+		    (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt,
+		    lr->lr_uid, lr->lr_gid);
+		/*FALLTHROUGH*/
+	case TX_MKDIR_ACL_ATTR:
+		if (name == NULL) {
+			lrattr = (lr_attr_t *)(caddr_t)(lracl + 1);
+			xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
+			zfs_replay_xvattr(lrattr, &xva);
+		}
+		vsec.vsa_mask = VSA_ACE | VSA_ACE_ACLFLAGS;
+		vsec.vsa_aclentp = (caddr_t)(lracl + 1) + xvatlen;
+		vsec.vsa_aclcnt = lracl->lr_aclcnt;
+		vsec.vsa_aclentsz = lracl->lr_acl_bytes;
+		vsec.vsa_aclflags = lracl->lr_acl_flags;
+		if (zfsvfs->z_fuid_replay == NULL) {
+			fuidstart = (caddr_t)(lracl + 1) + xvatlen +
+			    ZIL_ACE_LENGTH(lracl->lr_acl_bytes);
+			zfsvfs->z_fuid_replay =
+			    zfs_replay_fuids(fuidstart,
+			    (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt,
+			    lr->lr_uid, lr->lr_gid);
+		}
+		error = VOP_MKDIR(ZTOV(dzp), name, &xva.xva_vattr,
+		    &vp, kcred, NULL, vflg, &vsec);
+		break;
+	default:
+		error = ENOTSUP;
+	}
+
+bail:
+	if (error == 0 && vp != NULL)
+		VN_RELE(vp);
+
+	VN_RELE(ZTOV(dzp));
+
+	if (zfsvfs->z_fuid_replay)
+		zfs_fuid_info_free(zfsvfs->z_fuid_replay);
+	zfsvfs->z_fuid_replay = NULL;
+
+	return (error);
+}
+
+static int
+zfs_replay_create(zfsvfs_t *zfsvfs, lr_create_t *lr, boolean_t byteswap)
+{
+	char *name = NULL;		/* location determined later */
+	char *link;			/* symlink content follows name */
+	znode_t *dzp;
+	vnode_t *vp = NULL;
+	xvattr_t xva;
+	int vflg = 0;
+	size_t lrsize = sizeof (lr_create_t);
+	lr_attr_t *lrattr;
+	void *start;
+	size_t xvatlen;
+	uint64_t txtype;
+	int error;
+
+	txtype = (lr->lr_common.lrc_txtype & ~TX_CI);
+	if (byteswap) {
+		byteswap_uint64_array(lr, sizeof (*lr));
+		if (txtype == TX_CREATE_ATTR || txtype == TX_MKDIR_ATTR)
+			zfs_replay_swap_attrs((lr_attr_t *)(lr + 1));
+	}
+
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0)
+		return (error);
+
+	xva_init(&xva);
+	zfs_init_vattr(&xva.xva_vattr, AT_TYPE | AT_MODE | AT_UID | AT_GID,
+	    lr->lr_mode, lr->lr_uid, lr->lr_gid, lr->lr_rdev, lr->lr_foid);
+
+	/*
+	 * All forms of zfs create (create, mkdir, mkxattrdir, symlink)
+	 * eventually end up in zfs_mknode(), which assigns the object's
+	 * creation time and generation number.  The generic VOP_CREATE()
+	 * doesn't have either concept, so we smuggle the values inside
+	 * the vattr's otherwise unused va_ctime and va_nblocks fields.
+	 */
+	ZFS_TIME_DECODE(&xva.xva_vattr.va_ctime, lr->lr_crtime);
+	xva.xva_vattr.va_nblocks = lr->lr_gen;
+
+	error = dmu_object_info(zfsvfs->z_os, lr->lr_foid, NULL);
+	if (error != ENOENT)
+		goto out;
+
+	if (lr->lr_common.lrc_txtype & TX_CI)
+		vflg |= FIGNORECASE;
+
+	/*
+	 * Symlinks don't have fuid info, and CIFS never creates
+	 * symlinks.
+	 *
+	 * The _ATTR versions will grab the fuid info in their subcases.
+	 */
+	if ((int)lr->lr_common.lrc_txtype != TX_SYMLINK &&
+	    (int)lr->lr_common.lrc_txtype != TX_MKDIR_ATTR &&
+	    (int)lr->lr_common.lrc_txtype != TX_CREATE_ATTR) {
+		start = (lr + 1);
+		zfsvfs->z_fuid_replay =
+		    zfs_replay_fuid_domain(start, &start,
+		    lr->lr_uid, lr->lr_gid);
+	}
+
+	switch (txtype) {
+	case TX_CREATE_ATTR:
+		lrattr = (lr_attr_t *)(caddr_t)(lr + 1);
+		xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
+		zfs_replay_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), &xva);
+		start = (caddr_t)(lr + 1) + xvatlen;
+		zfsvfs->z_fuid_replay =
+		    zfs_replay_fuid_domain(start, &start,
+		    lr->lr_uid, lr->lr_gid);
+		name = (char *)start;
+
+		/*FALLTHROUGH*/
+	case TX_CREATE:
+		if (name == NULL)
+			name = (char *)start;
+
+		error = VOP_CREATE(ZTOV(dzp), name, &xva.xva_vattr,
+		    0, 0, &vp, kcred, vflg, NULL, NULL);
+		break;
+	case TX_MKDIR_ATTR:
+		lrattr = (lr_attr_t *)(caddr_t)(lr + 1);
+		xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
+		zfs_replay_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), &xva);
+		start = (caddr_t)(lr + 1) + xvatlen;
+		zfsvfs->z_fuid_replay =
+		    zfs_replay_fuid_domain(start, &start,
+		    lr->lr_uid, lr->lr_gid);
+		name = (char *)start;
+
+		/*FALLTHROUGH*/
+	case TX_MKDIR:
+		if (name == NULL)
+			name = (char *)(lr + 1);
+
+		error = VOP_MKDIR(ZTOV(dzp), name, &xva.xva_vattr,
+		    &vp, kcred, NULL, vflg, NULL);
+		break;
+	case TX_MKXATTR:
+		error = zfs_make_xattrdir(dzp, &xva.xva_vattr, &vp, kcred);
+		break;
+	case TX_SYMLINK:
+		name = (char *)(lr + 1);
+		link = name + strlen(name) + 1;
+		error = VOP_SYMLINK(ZTOV(dzp), name, &xva.xva_vattr,
+		    link, kcred, NULL, vflg);
+		break;
+	default:
+		error = ENOTSUP;
+	}
+
+out:
+	if (error == 0 && vp != NULL)
+		VN_RELE(vp);
+
+	VN_RELE(ZTOV(dzp));
+
+	if (zfsvfs->z_fuid_replay)
+		zfs_fuid_info_free(zfsvfs->z_fuid_replay);
+	zfsvfs->z_fuid_replay = NULL;
+	return (error);
+}
+
+static int
+zfs_replay_remove(zfsvfs_t *zfsvfs, lr_remove_t *lr, boolean_t byteswap)
+{
+	char *name = (char *)(lr + 1);	/* name follows lr_remove_t */
+	znode_t *dzp;
+	int error;
+	int vflg = 0;
+
+	if (byteswap)
+		byteswap_uint64_array(lr, sizeof (*lr));
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0)
+		return (error);
+
+	if (lr->lr_common.lrc_txtype & TX_CI)
+		vflg |= FIGNORECASE;
+
+	switch ((int)lr->lr_common.lrc_txtype) {
+	case TX_REMOVE:
+		error = VOP_REMOVE(ZTOV(dzp), name, kcred, NULL, vflg);
+		break;
+	case TX_RMDIR:
+		error = VOP_RMDIR(ZTOV(dzp), name, NULL, kcred, NULL, vflg);
+		break;
+	default:
+		error = ENOTSUP;
+	}
+
+	VN_RELE(ZTOV(dzp));
+
+	return (error);
+}
+
+static int
+zfs_replay_link(zfsvfs_t *zfsvfs, lr_link_t *lr, boolean_t byteswap)
+{
+	char *name = (char *)(lr + 1);	/* name follows lr_link_t */
+	znode_t *dzp, *zp;
+	int error;
+	int vflg = 0;
+
+	if (byteswap)
+		byteswap_uint64_array(lr, sizeof (*lr));
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0)
+		return (error);
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_link_obj, &zp)) != 0) {
+		VN_RELE(ZTOV(dzp));
+		return (error);
+	}
+
+	if (lr->lr_common.lrc_txtype & TX_CI)
+		vflg |= FIGNORECASE;
+
+	error = VOP_LINK(ZTOV(dzp), ZTOV(zp), name, kcred, NULL, vflg);
+
+	VN_RELE(ZTOV(zp));
+	VN_RELE(ZTOV(dzp));
+
+	return (error);
+}
+
+static int
+zfs_replay_rename(zfsvfs_t *zfsvfs, lr_rename_t *lr, boolean_t byteswap)
+{
+	char *sname = (char *)(lr + 1);	/* sname and tname follow lr_rename_t */
+	char *tname = sname + strlen(sname) + 1;
+	znode_t *sdzp, *tdzp;
+	int error;
+	int vflg = 0;
+
+	if (byteswap)
+		byteswap_uint64_array(lr, sizeof (*lr));
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_sdoid, &sdzp)) != 0)
+		return (error);
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_tdoid, &tdzp)) != 0) {
+		VN_RELE(ZTOV(sdzp));
+		return (error);
+	}
+
+	if (lr->lr_common.lrc_txtype & TX_CI)
+		vflg |= FIGNORECASE;
+
+	error = VOP_RENAME(ZTOV(sdzp), sname, ZTOV(tdzp), tname, kcred,
+	    NULL, vflg);
+
+	VN_RELE(ZTOV(tdzp));
+	VN_RELE(ZTOV(sdzp));
+
+	return (error);
+}
+
+static int
+zfs_replay_write(zfsvfs_t *zfsvfs, lr_write_t *lr, boolean_t byteswap)
+{
+	char *data = (char *)(lr + 1);	/* data follows lr_write_t */
+	znode_t	*zp;
+	int error;
+	ssize_t resid;
+	uint64_t eod, offset, length;
+
+	if (byteswap)
+		byteswap_uint64_array(lr, sizeof (*lr));
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) {
+		/*
+		 * As we can log writes out of order, it's possible the
+		 * file has been removed. In this case just drop the write
+		 * and return success.
+		 */
+		if (error == ENOENT)
+			error = 0;
+		return (error);
+	}
+
+	offset = lr->lr_offset;
+	length = lr->lr_length;
+	eod = offset + length;	/* end of data for this write */
+
+	/*
+	 * This may be a write from a dmu_sync() for a whole block,
+	 * and may extend beyond the current end of the file.
+	 * We can't just replay what was written for this TX_WRITE as
+	 * a future TX_WRITE2 may extend the eof and the data for that
+	 * write needs to be there. So we write the whole block and
+	 * reduce the eof. This needs to be done within the single dmu
+	 * transaction created within vn_rdwr -> zfs_write. So a possible
+	 * new end of file is passed through in zfsvfs->z_replay_eof
+	 */
+
+	zfsvfs->z_replay_eof = 0; /* 0 means don't change end of file */
+
+	/* If it's a dmu_sync() block, write the whole block */
+	if (lr->lr_common.lrc_reclen == sizeof (lr_write_t)) {
+		uint64_t blocksize = BP_GET_LSIZE(&lr->lr_blkptr);
+		if (length < blocksize) {
+			offset -= offset % blocksize;
+			length = blocksize;
+		}
+		if (zp->z_size < eod)
+			zfsvfs->z_replay_eof = eod;
+	}
+
+	error = vn_rdwr(UIO_WRITE, ZTOV(zp), data, length, offset,
+	    UIO_SYSSPACE, 0, RLIM64_INFINITY, kcred, &resid);
+
+	VN_RELE(ZTOV(zp));
+	zfsvfs->z_replay_eof = 0;	/* safety */
+
+	return (error);
+}
+
+/*
+ * TX_WRITE2 are only generated when dmu_sync() returns EALREADY
+ * meaning the pool block is already being synced. So now that we always write
+ * out full blocks, all we have to do is expand the eof if
+ * the file is grown.
+ */
+static int
+zfs_replay_write2(zfsvfs_t *zfsvfs, lr_write_t *lr, boolean_t byteswap)
+{
+	znode_t	*zp;
+	int error;
+	uint64_t end;
+
+	if (byteswap)
+		byteswap_uint64_array(lr, sizeof (*lr));
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
+		return (error);
+
+top:
+	end = lr->lr_offset + lr->lr_length;
+	if (end > zp->z_size) {
+		dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
+
+		zp->z_size = end;
+		dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+		error = dmu_tx_assign(tx, TXG_WAIT);
+		if (error) {
+			VN_RELE(ZTOV(zp));
+			if (error == ERESTART) {
+				dmu_tx_wait(tx);
+				dmu_tx_abort(tx);
+				goto top;
+			}
+			dmu_tx_abort(tx);
+			return (error);
+		}
+		(void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs),
+		    (void *)&zp->z_size, sizeof (uint64_t), tx);
+
+		/* Ensure the replayed seq is updated */
+		(void) zil_replaying(zfsvfs->z_log, tx);
+
+		dmu_tx_commit(tx);
+	}
+
+	VN_RELE(ZTOV(zp));
+
+	return (error);
+}
+
+static int
+zfs_replay_truncate(zfsvfs_t *zfsvfs, lr_truncate_t *lr, boolean_t byteswap)
+{
+	znode_t *zp;
+	flock64_t fl;
+	int error;
+
+	if (byteswap)
+		byteswap_uint64_array(lr, sizeof (*lr));
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
+		return (error);
+
+	bzero(&fl, sizeof (fl));
+	fl.l_type = F_WRLCK;
+	fl.l_whence = 0;
+	fl.l_start = lr->lr_offset;
+	fl.l_len = lr->lr_length;
+
+	error = VOP_SPACE(ZTOV(zp), F_FREESP, &fl, FWRITE | FOFFMAX,
+	    lr->lr_offset, kcred, NULL);
+
+	VN_RELE(ZTOV(zp));
+
+	return (error);
+}
+
+static int
+zfs_replay_setattr(zfsvfs_t *zfsvfs, lr_setattr_t *lr, boolean_t byteswap)
+{
+	znode_t *zp;
+	xvattr_t xva;
+	vattr_t *vap = &xva.xva_vattr;
+	int error;
+	void *start;
+
+	xva_init(&xva);
+	if (byteswap) {
+		byteswap_uint64_array(lr, sizeof (*lr));
+
+		if ((lr->lr_mask & AT_XVATTR) &&
+		    zfsvfs->z_version >= ZPL_VERSION_INITIAL)
+			zfs_replay_swap_attrs((lr_attr_t *)(lr + 1));
+	}
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
+		return (error);
+
+	zfs_init_vattr(vap, lr->lr_mask, lr->lr_mode,
+	    lr->lr_uid, lr->lr_gid, 0, lr->lr_foid);
+
+	vap->va_size = lr->lr_size;
+	ZFS_TIME_DECODE(&vap->va_atime, lr->lr_atime);
+	ZFS_TIME_DECODE(&vap->va_mtime, lr->lr_mtime);
+
+	/*
+	 * Fill in xvattr_t portions if necessary.
+	 */
+
+	start = (lr_setattr_t *)(lr + 1);
+	if (vap->va_mask & AT_XVATTR) {
+		zfs_replay_xvattr((lr_attr_t *)start, &xva);
+		start = (caddr_t)start +
+		    ZIL_XVAT_SIZE(((lr_attr_t *)start)->lr_attr_masksize);
+	} else
+		xva.xva_vattr.va_mask &= ~AT_XVATTR;
+
+	zfsvfs->z_fuid_replay = zfs_replay_fuid_domain(start, &start,
+	    lr->lr_uid, lr->lr_gid);
+
+	error = VOP_SETATTR(ZTOV(zp), vap, 0, kcred, NULL);
+
+	zfs_fuid_info_free(zfsvfs->z_fuid_replay);
+	zfsvfs->z_fuid_replay = NULL;
+	VN_RELE(ZTOV(zp));
+
+	return (error);
+}
+
+static int
+zfs_replay_acl_v0(zfsvfs_t *zfsvfs, lr_acl_v0_t *lr, boolean_t byteswap)
+{
+	ace_t *ace = (ace_t *)(lr + 1);	/* ace array follows lr_acl_t */
+	vsecattr_t vsa;
+	znode_t *zp;
+	int error;
+
+	if (byteswap) {
+		byteswap_uint64_array(lr, sizeof (*lr));
+		zfs_oldace_byteswap(ace, lr->lr_aclcnt);
+	}
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
+		return (error);
+
+	bzero(&vsa, sizeof (vsa));
+	vsa.vsa_mask = VSA_ACE | VSA_ACECNT;
+	vsa.vsa_aclcnt = lr->lr_aclcnt;
+	vsa.vsa_aclentsz = sizeof (ace_t) * vsa.vsa_aclcnt;
+	vsa.vsa_aclflags = 0;
+	vsa.vsa_aclentp = ace;
+
+	error = VOP_SETSECATTR(ZTOV(zp), &vsa, 0, kcred, NULL);
+
+	VN_RELE(ZTOV(zp));
+
+	return (error);
+}
+
+/*
+ * Replaying ACLs is complicated by FUID support.
+ * The log record may contain some optional data
+ * to be used for replaying FUID's.  These pieces
+ * are the actual FUIDs that were created initially.
+ * The FUID table index may no longer be valid and
+ * during zfs_create() a new index may be assigned.
+ * Because of this the log will contain the original
+ * doman+rid in order to create a new FUID.
+ *
+ * The individual ACEs may contain an ephemeral uid/gid which is no
+ * longer valid and will need to be replaced with an actual FUID.
+ *
+ */
+static int
+zfs_replay_acl(zfsvfs_t *zfsvfs, lr_acl_t *lr, boolean_t byteswap)
+{
+	ace_t *ace = (ace_t *)(lr + 1);
+	vsecattr_t vsa;
+	znode_t *zp;
+	int error;
+
+	if (byteswap) {
+		byteswap_uint64_array(lr, sizeof (*lr));
+		zfs_ace_byteswap(ace, lr->lr_acl_bytes, B_FALSE);
+		if (lr->lr_fuidcnt) {
+			byteswap_uint64_array((caddr_t)ace +
+			    ZIL_ACE_LENGTH(lr->lr_acl_bytes),
+			    lr->lr_fuidcnt * sizeof (uint64_t));
+		}
+	}
+
+	if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0)
+		return (error);
+
+	bzero(&vsa, sizeof (vsa));
+	vsa.vsa_mask = VSA_ACE | VSA_ACECNT | VSA_ACE_ACLFLAGS;
+	vsa.vsa_aclcnt = lr->lr_aclcnt;
+	vsa.vsa_aclentp = ace;
+	vsa.vsa_aclentsz = lr->lr_acl_bytes;
+	vsa.vsa_aclflags = lr->lr_acl_flags;
+
+	if (lr->lr_fuidcnt) {
+		void *fuidstart = (caddr_t)ace +
+		    ZIL_ACE_LENGTH(lr->lr_acl_bytes);
+
+		zfsvfs->z_fuid_replay =
+		    zfs_replay_fuids(fuidstart, &fuidstart,
+		    lr->lr_fuidcnt, lr->lr_domcnt, 0, 0);
+	}
+
+	error = VOP_SETSECATTR(ZTOV(zp), &vsa, 0, kcred, NULL);
+
+	if (zfsvfs->z_fuid_replay)
+		zfs_fuid_info_free(zfsvfs->z_fuid_replay);
+
+	zfsvfs->z_fuid_replay = NULL;
+	VN_RELE(ZTOV(zp));
+
+	return (error);
+}
+
+/*
+ * Callback vectors for replaying records
+ */
+zil_replay_func_t *zfs_replay_vector[TX_MAX_TYPE] = {
+	zfs_replay_error,	/* 0 no such transaction type */
+	zfs_replay_create,	/* TX_CREATE */
+	zfs_replay_create,	/* TX_MKDIR */
+	zfs_replay_create,	/* TX_MKXATTR */
+	zfs_replay_create,	/* TX_SYMLINK */
+	zfs_replay_remove,	/* TX_REMOVE */
+	zfs_replay_remove,	/* TX_RMDIR */
+	zfs_replay_link,	/* TX_LINK */
+	zfs_replay_rename,	/* TX_RENAME */
+	zfs_replay_write,	/* TX_WRITE */
+	zfs_replay_truncate,	/* TX_TRUNCATE */
+	zfs_replay_setattr,	/* TX_SETATTR */
+	zfs_replay_acl_v0,	/* TX_ACL_V0 */
+	zfs_replay_acl,		/* TX_ACL */
+	zfs_replay_create_acl,	/* TX_CREATE_ACL */
+	zfs_replay_create,	/* TX_CREATE_ATTR */
+	zfs_replay_create_acl,	/* TX_CREATE_ACL_ATTR */
+	zfs_replay_create_acl,	/* TX_MKDIR_ACL */
+	zfs_replay_create,	/* TX_MKDIR_ATTR */
+	zfs_replay_create_acl,	/* TX_MKDIR_ACL_ATTR */
+	zfs_replay_write2,	/* TX_WRITE2 */
+};
diff --git a/uts/common/fs/zfs/zfs_rlock.c b/uts/common/fs/zfs/zfs_rlock.c
new file mode 100644
index 000000000000..7fd8f6020d08
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_rlock.c
@@ -0,0 +1,602 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * This file contains the code to implement file range locking in
+ * ZFS, although there isn't much specific to ZFS (all that comes to mind
+ * support for growing the blocksize).
+ *
+ * Interface
+ * ---------
+ * Defined in zfs_rlock.h but essentially:
+ *	rl = zfs_range_lock(zp, off, len, lock_type);
+ *	zfs_range_unlock(rl);
+ *	zfs_range_reduce(rl, off, len);
+ *
+ * AVL tree
+ * --------
+ * An AVL tree is used to maintain the state of the existing ranges
+ * that are locked for exclusive (writer) or shared (reader) use.
+ * The starting range offset is used for searching and sorting the tree.
+ *
+ * Common case
+ * -----------
+ * The (hopefully) usual case is of no overlaps or contention for
+ * locks. On entry to zfs_lock_range() a rl_t is allocated; the tree
+ * searched that finds no overlap, and *this* rl_t is placed in the tree.
+ *
+ * Overlaps/Reference counting/Proxy locks
+ * ---------------------------------------
+ * The avl code only allows one node at a particular offset. Also it's very
+ * inefficient to search through all previous entries looking for overlaps
+ * (because the very 1st in the ordered list might be at offset 0 but
+ * cover the whole file).
+ * So this implementation uses reference counts and proxy range locks.
+ * Firstly, only reader locks use reference counts and proxy locks,
+ * because writer locks are exclusive.
+ * When a reader lock overlaps with another then a proxy lock is created
+ * for that range and replaces the original lock. If the overlap
+ * is exact then the reference count of the proxy is simply incremented.
+ * Otherwise, the proxy lock is split into smaller lock ranges and
+ * new proxy locks created for non overlapping ranges.
+ * The reference counts are adjusted accordingly.
+ * Meanwhile, the orginal lock is kept around (this is the callers handle)
+ * and its offset and length are used when releasing the lock.
+ *
+ * Thread coordination
+ * -------------------
+ * In order to make wakeups efficient and to ensure multiple continuous
+ * readers on a range don't starve a writer for the same range lock,
+ * two condition variables are allocated in each rl_t.
+ * If a writer (or reader) can't get a range it initialises the writer
+ * (or reader) cv; sets a flag saying there's a writer (or reader) waiting;
+ * and waits on that cv. When a thread unlocks that range it wakes up all
+ * writers then all readers before destroying the lock.
+ *
+ * Append mode writes
+ * ------------------
+ * Append mode writes need to lock a range at the end of a file.
+ * The offset of the end of the file is determined under the
+ * range locking mutex, and the lock type converted from RL_APPEND to
+ * RL_WRITER and the range locked.
+ *
+ * Grow block handling
+ * -------------------
+ * ZFS supports multiple block sizes currently upto 128K. The smallest
+ * block size is used for the file which is grown as needed. During this
+ * growth all other writers and readers must be excluded.
+ * So if the block size needs to be grown then the whole file is
+ * exclusively locked, then later the caller will reduce the lock
+ * range to just the range to be written using zfs_reduce_range.
+ */
+
+#include <sys/zfs_rlock.h>
+
+/*
+ * Check if a write lock can be grabbed, or wait and recheck until available.
+ */
+static void
+zfs_range_lock_writer(znode_t *zp, rl_t *new)
+{
+	avl_tree_t *tree = &zp->z_range_avl;
+	rl_t *rl;
+	avl_index_t where;
+	uint64_t end_size;
+	uint64_t off = new->r_off;
+	uint64_t len = new->r_len;
+
+	for (;;) {
+		/*
+		 * Range locking is also used by zvol and uses a
+		 * dummied up znode. However, for zvol, we don't need to
+		 * append or grow blocksize, and besides we don't have
+		 * a "sa" data or z_zfsvfs - so skip that processing.
+		 *
+		 * Yes, this is ugly, and would be solved by not handling
+		 * grow or append in range lock code. If that was done then
+		 * we could make the range locking code generically available
+		 * to other non-zfs consumers.
+		 */
+		if (zp->z_vnode) { /* caller is ZPL */
+			/*
+			 * If in append mode pick up the current end of file.
+			 * This is done under z_range_lock to avoid races.
+			 */
+			if (new->r_type == RL_APPEND)
+				new->r_off = zp->z_size;
+
+			/*
+			 * If we need to grow the block size then grab the whole
+			 * file range. This is also done under z_range_lock to
+			 * avoid races.
+			 */
+			end_size = MAX(zp->z_size, new->r_off + len);
+			if (end_size > zp->z_blksz && (!ISP2(zp->z_blksz) ||
+			    zp->z_blksz < zp->z_zfsvfs->z_max_blksz)) {
+				new->r_off = 0;
+				new->r_len = UINT64_MAX;
+			}
+		}
+
+		/*
+		 * First check for the usual case of no locks
+		 */
+		if (avl_numnodes(tree) == 0) {
+			new->r_type = RL_WRITER; /* convert to writer */
+			avl_add(tree, new);
+			return;
+		}
+
+		/*
+		 * Look for any locks in the range.
+		 */
+		rl = avl_find(tree, new, &where);
+		if (rl)
+			goto wait; /* already locked at same offset */
+
+		rl = (rl_t *)avl_nearest(tree, where, AVL_AFTER);
+		if (rl && (rl->r_off < new->r_off + new->r_len))
+			goto wait;
+
+		rl = (rl_t *)avl_nearest(tree, where, AVL_BEFORE);
+		if (rl && rl->r_off + rl->r_len > new->r_off)
+			goto wait;
+
+		new->r_type = RL_WRITER; /* convert possible RL_APPEND */
+		avl_insert(tree, new, where);
+		return;
+wait:
+		if (!rl->r_write_wanted) {
+			cv_init(&rl->r_wr_cv, NULL, CV_DEFAULT, NULL);
+			rl->r_write_wanted = B_TRUE;
+		}
+		cv_wait(&rl->r_wr_cv, &zp->z_range_lock);
+
+		/* reset to original */
+		new->r_off = off;
+		new->r_len = len;
+	}
+}
+
+/*
+ * If this is an original (non-proxy) lock then replace it by
+ * a proxy and return the proxy.
+ */
+static rl_t *
+zfs_range_proxify(avl_tree_t *tree, rl_t *rl)
+{
+	rl_t *proxy;
+
+	if (rl->r_proxy)
+		return (rl); /* already a proxy */
+
+	ASSERT3U(rl->r_cnt, ==, 1);
+	ASSERT(rl->r_write_wanted == B_FALSE);
+	ASSERT(rl->r_read_wanted == B_FALSE);
+	avl_remove(tree, rl);
+	rl->r_cnt = 0;
+
+	/* create a proxy range lock */
+	proxy = kmem_alloc(sizeof (rl_t), KM_SLEEP);
+	proxy->r_off = rl->r_off;
+	proxy->r_len = rl->r_len;
+	proxy->r_cnt = 1;
+	proxy->r_type = RL_READER;
+	proxy->r_proxy = B_TRUE;
+	proxy->r_write_wanted = B_FALSE;
+	proxy->r_read_wanted = B_FALSE;
+	avl_add(tree, proxy);
+
+	return (proxy);
+}
+
+/*
+ * Split the range lock at the supplied offset
+ * returning the *front* proxy.
+ */
+static rl_t *
+zfs_range_split(avl_tree_t *tree, rl_t *rl, uint64_t off)
+{
+	rl_t *front, *rear;
+
+	ASSERT3U(rl->r_len, >, 1);
+	ASSERT3U(off, >, rl->r_off);
+	ASSERT3U(off, <, rl->r_off + rl->r_len);
+	ASSERT(rl->r_write_wanted == B_FALSE);
+	ASSERT(rl->r_read_wanted == B_FALSE);
+
+	/* create the rear proxy range lock */
+	rear = kmem_alloc(sizeof (rl_t), KM_SLEEP);
+	rear->r_off = off;
+	rear->r_len = rl->r_off + rl->r_len - off;
+	rear->r_cnt = rl->r_cnt;
+	rear->r_type = RL_READER;
+	rear->r_proxy = B_TRUE;
+	rear->r_write_wanted = B_FALSE;
+	rear->r_read_wanted = B_FALSE;
+
+	front = zfs_range_proxify(tree, rl);
+	front->r_len = off - rl->r_off;
+
+	avl_insert_here(tree, rear, front, AVL_AFTER);
+	return (front);
+}
+
+/*
+ * Create and add a new proxy range lock for the supplied range.
+ */
+static void
+zfs_range_new_proxy(avl_tree_t *tree, uint64_t off, uint64_t len)
+{
+	rl_t *rl;
+
+	ASSERT(len);
+	rl = kmem_alloc(sizeof (rl_t), KM_SLEEP);
+	rl->r_off = off;
+	rl->r_len = len;
+	rl->r_cnt = 1;
+	rl->r_type = RL_READER;
+	rl->r_proxy = B_TRUE;
+	rl->r_write_wanted = B_FALSE;
+	rl->r_read_wanted = B_FALSE;
+	avl_add(tree, rl);
+}
+
+static void
+zfs_range_add_reader(avl_tree_t *tree, rl_t *new, rl_t *prev, avl_index_t where)
+{
+	rl_t *next;
+	uint64_t off = new->r_off;
+	uint64_t len = new->r_len;
+
+	/*
+	 * prev arrives either:
+	 * - pointing to an entry at the same offset
+	 * - pointing to the entry with the closest previous offset whose
+	 *   range may overlap with the new range
+	 * - null, if there were no ranges starting before the new one
+	 */
+	if (prev) {
+		if (prev->r_off + prev->r_len <= off) {
+			prev = NULL;
+		} else if (prev->r_off != off) {
+			/*
+			 * convert to proxy if needed then
+			 * split this entry and bump ref count
+			 */
+			prev = zfs_range_split(tree, prev, off);
+			prev = AVL_NEXT(tree, prev); /* move to rear range */
+		}
+	}
+	ASSERT((prev == NULL) || (prev->r_off == off));
+
+	if (prev)
+		next = prev;
+	else
+		next = (rl_t *)avl_nearest(tree, where, AVL_AFTER);
+
+	if (next == NULL || off + len <= next->r_off) {
+		/* no overlaps, use the original new rl_t in the tree */
+		avl_insert(tree, new, where);
+		return;
+	}
+
+	if (off < next->r_off) {
+		/* Add a proxy for initial range before the overlap */
+		zfs_range_new_proxy(tree, off, next->r_off - off);
+	}
+
+	new->r_cnt = 0; /* will use proxies in tree */
+	/*
+	 * We now search forward through the ranges, until we go past the end
+	 * of the new range. For each entry we make it a proxy if it
+	 * isn't already, then bump its reference count. If there's any
+	 * gaps between the ranges then we create a new proxy range.
+	 */
+	for (prev = NULL; next; prev = next, next = AVL_NEXT(tree, next)) {
+		if (off + len <= next->r_off)
+			break;
+		if (prev && prev->r_off + prev->r_len < next->r_off) {
+			/* there's a gap */
+			ASSERT3U(next->r_off, >, prev->r_off + prev->r_len);
+			zfs_range_new_proxy(tree, prev->r_off + prev->r_len,
+			    next->r_off - (prev->r_off + prev->r_len));
+		}
+		if (off + len == next->r_off + next->r_len) {
+			/* exact overlap with end */
+			next = zfs_range_proxify(tree, next);
+			next->r_cnt++;
+			return;
+		}
+		if (off + len < next->r_off + next->r_len) {
+			/* new range ends in the middle of this block */
+			next = zfs_range_split(tree, next, off + len);
+			next->r_cnt++;
+			return;
+		}
+		ASSERT3U(off + len, >, next->r_off + next->r_len);
+		next = zfs_range_proxify(tree, next);
+		next->r_cnt++;
+	}
+
+	/* Add the remaining end range. */
+	zfs_range_new_proxy(tree, prev->r_off + prev->r_len,
+	    (off + len) - (prev->r_off + prev->r_len));
+}
+
+/*
+ * Check if a reader lock can be grabbed, or wait and recheck until available.
+ */
+static void
+zfs_range_lock_reader(znode_t *zp, rl_t *new)
+{
+	avl_tree_t *tree = &zp->z_range_avl;
+	rl_t *prev, *next;
+	avl_index_t where;
+	uint64_t off = new->r_off;
+	uint64_t len = new->r_len;
+
+	/*
+	 * Look for any writer locks in the range.
+	 */
+retry:
+	prev = avl_find(tree, new, &where);
+	if (prev == NULL)
+		prev = (rl_t *)avl_nearest(tree, where, AVL_BEFORE);
+
+	/*
+	 * Check the previous range for a writer lock overlap.
+	 */
+	if (prev && (off < prev->r_off + prev->r_len)) {
+		if ((prev->r_type == RL_WRITER) || (prev->r_write_wanted)) {
+			if (!prev->r_read_wanted) {
+				cv_init(&prev->r_rd_cv, NULL, CV_DEFAULT, NULL);
+				prev->r_read_wanted = B_TRUE;
+			}
+			cv_wait(&prev->r_rd_cv, &zp->z_range_lock);
+			goto retry;
+		}
+		if (off + len < prev->r_off + prev->r_len)
+			goto got_lock;
+	}
+
+	/*
+	 * Search through the following ranges to see if there's
+	 * write lock any overlap.
+	 */
+	if (prev)
+		next = AVL_NEXT(tree, prev);
+	else
+		next = (rl_t *)avl_nearest(tree, where, AVL_AFTER);
+	for (; next; next = AVL_NEXT(tree, next)) {
+		if (off + len <= next->r_off)
+			goto got_lock;
+		if ((next->r_type == RL_WRITER) || (next->r_write_wanted)) {
+			if (!next->r_read_wanted) {
+				cv_init(&next->r_rd_cv, NULL, CV_DEFAULT, NULL);
+				next->r_read_wanted = B_TRUE;
+			}
+			cv_wait(&next->r_rd_cv, &zp->z_range_lock);
+			goto retry;
+		}
+		if (off + len <= next->r_off + next->r_len)
+			goto got_lock;
+	}
+
+got_lock:
+	/*
+	 * Add the read lock, which may involve splitting existing
+	 * locks and bumping ref counts (r_cnt).
+	 */
+	zfs_range_add_reader(tree, new, prev, where);
+}
+
+/*
+ * Lock a range (offset, length) as either shared (RL_READER)
+ * or exclusive (RL_WRITER). Returns the range lock structure
+ * for later unlocking or reduce range (if entire file
+ * previously locked as RL_WRITER).
+ */
+rl_t *
+zfs_range_lock(znode_t *zp, uint64_t off, uint64_t len, rl_type_t type)
+{
+	rl_t *new;
+
+	ASSERT(type == RL_READER || type == RL_WRITER || type == RL_APPEND);
+
+	new = kmem_alloc(sizeof (rl_t), KM_SLEEP);
+	new->r_zp = zp;
+	new->r_off = off;
+	if (len + off < off)	/* overflow */
+		len = UINT64_MAX - off;
+	new->r_len = len;
+	new->r_cnt = 1; /* assume it's going to be in the tree */
+	new->r_type = type;
+	new->r_proxy = B_FALSE;
+	new->r_write_wanted = B_FALSE;
+	new->r_read_wanted = B_FALSE;
+
+	mutex_enter(&zp->z_range_lock);
+	if (type == RL_READER) {
+		/*
+		 * First check for the usual case of no locks
+		 */
+		if (avl_numnodes(&zp->z_range_avl) == 0)
+			avl_add(&zp->z_range_avl, new);
+		else
+			zfs_range_lock_reader(zp, new);
+	} else
+		zfs_range_lock_writer(zp, new); /* RL_WRITER or RL_APPEND */
+	mutex_exit(&zp->z_range_lock);
+	return (new);
+}
+
+/*
+ * Unlock a reader lock
+ */
+static void
+zfs_range_unlock_reader(znode_t *zp, rl_t *remove)
+{
+	avl_tree_t *tree = &zp->z_range_avl;
+	rl_t *rl, *next;
+	uint64_t len;
+
+	/*
+	 * The common case is when the remove entry is in the tree
+	 * (cnt == 1) meaning there's been no other reader locks overlapping
+	 * with this one. Otherwise the remove entry will have been
+	 * removed from the tree and replaced by proxies (one or
+	 * more ranges mapping to the entire range).
+	 */
+	if (remove->r_cnt == 1) {
+		avl_remove(tree, remove);
+		if (remove->r_write_wanted) {
+			cv_broadcast(&remove->r_wr_cv);
+			cv_destroy(&remove->r_wr_cv);
+		}
+		if (remove->r_read_wanted) {
+			cv_broadcast(&remove->r_rd_cv);
+			cv_destroy(&remove->r_rd_cv);
+		}
+	} else {
+		ASSERT3U(remove->r_cnt, ==, 0);
+		ASSERT3U(remove->r_write_wanted, ==, 0);
+		ASSERT3U(remove->r_read_wanted, ==, 0);
+		/*
+		 * Find start proxy representing this reader lock,
+		 * then decrement ref count on all proxies
+		 * that make up this range, freeing them as needed.
+		 */
+		rl = avl_find(tree, remove, NULL);
+		ASSERT(rl);
+		ASSERT(rl->r_cnt);
+		ASSERT(rl->r_type == RL_READER);
+		for (len = remove->r_len; len != 0; rl = next) {
+			len -= rl->r_len;
+			if (len) {
+				next = AVL_NEXT(tree, rl);
+				ASSERT(next);
+				ASSERT(rl->r_off + rl->r_len == next->r_off);
+				ASSERT(next->r_cnt);
+				ASSERT(next->r_type == RL_READER);
+			}
+			rl->r_cnt--;
+			if (rl->r_cnt == 0) {
+				avl_remove(tree, rl);
+				if (rl->r_write_wanted) {
+					cv_broadcast(&rl->r_wr_cv);
+					cv_destroy(&rl->r_wr_cv);
+				}
+				if (rl->r_read_wanted) {
+					cv_broadcast(&rl->r_rd_cv);
+					cv_destroy(&rl->r_rd_cv);
+				}
+				kmem_free(rl, sizeof (rl_t));
+			}
+		}
+	}
+	kmem_free(remove, sizeof (rl_t));
+}
+
+/*
+ * Unlock range and destroy range lock structure.
+ */
+void
+zfs_range_unlock(rl_t *rl)
+{
+	znode_t *zp = rl->r_zp;
+
+	ASSERT(rl->r_type == RL_WRITER || rl->r_type == RL_READER);
+	ASSERT(rl->r_cnt == 1 || rl->r_cnt == 0);
+	ASSERT(!rl->r_proxy);
+
+	mutex_enter(&zp->z_range_lock);
+	if (rl->r_type == RL_WRITER) {
+		/* writer locks can't be shared or split */
+		avl_remove(&zp->z_range_avl, rl);
+		mutex_exit(&zp->z_range_lock);
+		if (rl->r_write_wanted) {
+			cv_broadcast(&rl->r_wr_cv);
+			cv_destroy(&rl->r_wr_cv);
+		}
+		if (rl->r_read_wanted) {
+			cv_broadcast(&rl->r_rd_cv);
+			cv_destroy(&rl->r_rd_cv);
+		}
+		kmem_free(rl, sizeof (rl_t));
+	} else {
+		/*
+		 * lock may be shared, let zfs_range_unlock_reader()
+		 * release the lock and free the rl_t
+		 */
+		zfs_range_unlock_reader(zp, rl);
+		mutex_exit(&zp->z_range_lock);
+	}
+}
+
+/*
+ * Reduce range locked as RL_WRITER from whole file to specified range.
+ * Asserts the whole file is exclusivly locked and so there's only one
+ * entry in the tree.
+ */
+void
+zfs_range_reduce(rl_t *rl, uint64_t off, uint64_t len)
+{
+	znode_t *zp = rl->r_zp;
+
+	/* Ensure there are no other locks */
+	ASSERT(avl_numnodes(&zp->z_range_avl) == 1);
+	ASSERT(rl->r_off == 0);
+	ASSERT(rl->r_type == RL_WRITER);
+	ASSERT(!rl->r_proxy);
+	ASSERT3U(rl->r_len, ==, UINT64_MAX);
+	ASSERT3U(rl->r_cnt, ==, 1);
+
+	mutex_enter(&zp->z_range_lock);
+	rl->r_off = off;
+	rl->r_len = len;
+	mutex_exit(&zp->z_range_lock);
+	if (rl->r_write_wanted)
+		cv_broadcast(&rl->r_wr_cv);
+	if (rl->r_read_wanted)
+		cv_broadcast(&rl->r_rd_cv);
+}
+
+/*
+ * AVL comparison function used to order range locks
+ * Locks are ordered on the start offset of the range.
+ */
+int
+zfs_range_compare(const void *arg1, const void *arg2)
+{
+	const rl_t *rl1 = arg1;
+	const rl_t *rl2 = arg2;
+
+	if (rl1->r_off > rl2->r_off)
+		return (1);
+	if (rl1->r_off < rl2->r_off)
+		return (-1);
+	return (0);
+}
diff --git a/uts/common/fs/zfs/zfs_sa.c b/uts/common/fs/zfs/zfs_sa.c
new file mode 100644
index 000000000000..d141e43d722a
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_sa.c
@@ -0,0 +1,334 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/vnode.h>
+#include <sys/sa.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_sa.h>
+
+/*
+ * ZPL attribute registration table.
+ * Order of attributes doesn't matter
+ * a unique value will be assigned for each
+ * attribute that is file system specific
+ *
+ * This is just the set of ZPL attributes that this
+ * version of ZFS deals with natively.  The file system
+ * could have other attributes stored in files, but they will be
+ * ignored.  The SA framework will preserve them, just that
+ * this version of ZFS won't change or delete them.
+ */
+
+sa_attr_reg_t zfs_attr_table[ZPL_END+1] = {
+	{"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 0},
+	{"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 1},
+	{"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 2},
+	{"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 3},
+	{"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY, 4},
+	{"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY, 5},
+	{"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY, 6},
+	{"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY, 7},
+	{"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY, 8},
+	{"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY, 9},
+	{"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY, 10},
+	{"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY, 11},
+	{"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY, 12},
+	{"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY, 13},
+	{"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY, 14},
+	{"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY, 15},
+	{"ZPL_DACL_COUNT", sizeof (uint64_t), SA_UINT64_ARRAY, 0},
+	{"ZPL_SYMLINK", 0, SA_UINT8_ARRAY, 0},
+	{"ZPL_SCANSTAMP", 32, SA_UINT8_ARRAY, 0},
+	{"ZPL_DACL_ACES", 0, SA_ACL, 0},
+	{NULL, 0, 0, 0}
+};
+
+#ifdef _KERNEL
+
+int
+zfs_sa_readlink(znode_t *zp, uio_t *uio)
+{
+	dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
+	size_t bufsz;
+	int error;
+
+	bufsz = zp->z_size;
+	if (bufsz + ZFS_OLD_ZNODE_PHYS_SIZE <= db->db_size) {
+		error = uiomove((caddr_t)db->db_data +
+		    ZFS_OLD_ZNODE_PHYS_SIZE,
+		    MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio);
+	} else {
+		dmu_buf_t *dbp;
+		if ((error = dmu_buf_hold(zp->z_zfsvfs->z_os, zp->z_id,
+		    0, FTAG, &dbp, DMU_READ_NO_PREFETCH)) == 0) {
+			error = uiomove(dbp->db_data,
+			    MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio);
+			dmu_buf_rele(dbp, FTAG);
+		}
+	}
+	return (error);
+}
+
+void
+zfs_sa_symlink(znode_t *zp, char *link, int len, dmu_tx_t *tx)
+{
+	dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
+
+	if (ZFS_OLD_ZNODE_PHYS_SIZE + len <= dmu_bonus_max()) {
+		VERIFY(dmu_set_bonus(db,
+		    len + ZFS_OLD_ZNODE_PHYS_SIZE, tx) == 0);
+		if (len) {
+			bcopy(link, (caddr_t)db->db_data +
+			    ZFS_OLD_ZNODE_PHYS_SIZE, len);
+		}
+	} else {
+		dmu_buf_t *dbp;
+
+		zfs_grow_blocksize(zp, len, tx);
+		VERIFY(0 == dmu_buf_hold(zp->z_zfsvfs->z_os,
+		    zp->z_id, 0, FTAG, &dbp, DMU_READ_NO_PREFETCH));
+
+		dmu_buf_will_dirty(dbp, tx);
+
+		ASSERT3U(len, <=, dbp->db_size);
+		bcopy(link, dbp->db_data, len);
+		dmu_buf_rele(dbp, FTAG);
+	}
+}
+
+void
+zfs_sa_get_scanstamp(znode_t *zp, xvattr_t *xvap)
+{
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	xoptattr_t *xoap;
+
+	ASSERT(MUTEX_HELD(&zp->z_lock));
+	VERIFY((xoap = xva_getxoptattr(xvap)) != NULL);
+	if (zp->z_is_sa) {
+		if (sa_lookup(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs),
+		    &xoap->xoa_av_scanstamp,
+		    sizeof (xoap->xoa_av_scanstamp)) != 0)
+			return;
+	} else {
+		dmu_object_info_t doi;
+		dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
+		int len;
+
+		if (!(zp->z_pflags & ZFS_BONUS_SCANSTAMP))
+			return;
+
+		sa_object_info(zp->z_sa_hdl, &doi);
+		len = sizeof (xoap->xoa_av_scanstamp) +
+		    ZFS_OLD_ZNODE_PHYS_SIZE;
+
+		if (len <= doi.doi_bonus_size) {
+			(void) memcpy(xoap->xoa_av_scanstamp,
+			    (caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
+			    sizeof (xoap->xoa_av_scanstamp));
+		}
+	}
+	XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP);
+}
+
+void
+zfs_sa_set_scanstamp(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx)
+{
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	xoptattr_t *xoap;
+
+	ASSERT(MUTEX_HELD(&zp->z_lock));
+	VERIFY((xoap = xva_getxoptattr(xvap)) != NULL);
+	if (zp->z_is_sa)
+		VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SCANSTAMP(zfsvfs),
+		    &xoap->xoa_av_scanstamp,
+		    sizeof (xoap->xoa_av_scanstamp), tx));
+	else {
+		dmu_object_info_t doi;
+		dmu_buf_t *db = sa_get_db(zp->z_sa_hdl);
+		int len;
+
+		sa_object_info(zp->z_sa_hdl, &doi);
+		len = sizeof (xoap->xoa_av_scanstamp) +
+		    ZFS_OLD_ZNODE_PHYS_SIZE;
+		if (len > doi.doi_bonus_size)
+			VERIFY(dmu_set_bonus(db, len, tx) == 0);
+		(void) memcpy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
+		    xoap->xoa_av_scanstamp, sizeof (xoap->xoa_av_scanstamp));
+
+		zp->z_pflags |= ZFS_BONUS_SCANSTAMP;
+		VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs),
+		    &zp->z_pflags, sizeof (uint64_t), tx));
+	}
+}
+
+/*
+ * I'm not convinced we should do any of this upgrade.
+ * since the SA code can read both old/new znode formats
+ * with probably little to know performance difference.
+ *
+ * All new files will be created with the new format.
+ */
+
+void
+zfs_sa_upgrade(sa_handle_t *hdl, dmu_tx_t *tx)
+{
+	dmu_buf_t *db = sa_get_db(hdl);
+	znode_t *zp = sa_get_userdata(hdl);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	sa_bulk_attr_t bulk[20];
+	int count = 0;
+	sa_bulk_attr_t sa_attrs[20] = { 0 };
+	zfs_acl_locator_cb_t locate = { 0 };
+	uint64_t uid, gid, mode, rdev, xattr, parent;
+	uint64_t crtime[2], mtime[2], ctime[2];
+	zfs_acl_phys_t znode_acl;
+	char scanstamp[AV_SCANSTAMP_SZ];
+	boolean_t drop_lock = B_FALSE;
+
+	/*
+	 * No upgrade if ACL isn't cached
+	 * since we won't know which locks are held
+	 * and ready the ACL would require special "locked"
+	 * interfaces that would be messy
+	 */
+	if (zp->z_acl_cached == NULL || ZTOV(zp)->v_type == VLNK)
+		return;
+
+	/*
+	 * If the z_lock is held and we aren't the owner
+	 * the just return since we don't want to deadlock
+	 * trying to update the status of z_is_sa.  This
+	 * file can then be upgraded at a later time.
+	 *
+	 * Otherwise, we know we are doing the
+	 * sa_update() that caused us to enter this function.
+	 */
+	if (mutex_owner(&zp->z_lock) != curthread) {
+		if (mutex_tryenter(&zp->z_lock) == 0)
+			return;
+		else
+			drop_lock = B_TRUE;
+	}
+
+	/* First do a bulk query of the attributes that aren't cached */
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL, &xattr, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL, &rdev, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
+	    &znode_acl, 88);
+
+	if (sa_bulk_lookup_locked(hdl, bulk, count) != 0)
+		goto done;
+
+
+	/*
+	 * While the order here doesn't matter its best to try and organize
+	 * it is such a way to pick up an already existing layout number
+	 */
+	count = 0;
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SIZE(zfsvfs), NULL,
+	    &zp->z_size, 8);
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GEN(zfsvfs),
+	    NULL, &zp->z_gen, 8);
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_PARENT(zfsvfs),
+	    NULL, &parent, 8);
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+	    &zp->z_pflags, 8);
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_ATIME(zfsvfs), NULL,
+	    zp->z_atime, 16);
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_MTIME(zfsvfs), NULL,
+	    &mtime, 16);
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CTIME(zfsvfs), NULL,
+	    &ctime, 16);
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL,
+	    &crtime, 16);
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_LINKS(zfsvfs), NULL,
+	    &zp->z_links, 8);
+	if (zp->z_vnode->v_type == VBLK || zp->z_vnode->v_type == VCHR)
+		SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_RDEV(zfsvfs), NULL,
+		    &rdev, 8);
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL,
+	    &zp->z_acl_cached->z_acl_count, 8);
+
+	if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID)
+		zfs_acl_xform(zp, zp->z_acl_cached, CRED());
+
+	locate.cb_aclp = zp->z_acl_cached;
+	SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_DACL_ACES(zfsvfs),
+	    zfs_acl_data_locator, &locate, zp->z_acl_cached->z_acl_bytes);
+
+	if (xattr)
+		SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_XATTR(zfsvfs),
+		    NULL, &xattr, 8);
+
+	/* if scanstamp then add scanstamp */
+
+	if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) {
+		bcopy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
+		    scanstamp, AV_SCANSTAMP_SZ);
+		SA_ADD_BULK_ATTR(sa_attrs, count, SA_ZPL_SCANSTAMP(zfsvfs),
+		    NULL, scanstamp, AV_SCANSTAMP_SZ);
+		zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP;
+	}
+
+	VERIFY(dmu_set_bonustype(db, DMU_OT_SA, tx) == 0);
+	VERIFY(sa_replace_all_by_template_locked(hdl, sa_attrs,
+	    count, tx) == 0);
+	if (znode_acl.z_acl_extern_obj)
+		VERIFY(0 == dmu_object_free(zfsvfs->z_os,
+		    znode_acl.z_acl_extern_obj, tx));
+
+	zp->z_is_sa = B_TRUE;
+done:
+	if (drop_lock)
+		mutex_exit(&zp->z_lock);
+}
+
+void
+zfs_sa_upgrade_txholds(dmu_tx_t *tx, znode_t *zp)
+{
+	if (!zp->z_zfsvfs->z_use_sa || zp->z_is_sa)
+		return;
+
+
+	dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+
+	if (zfs_external_acl(zp)) {
+		dmu_tx_hold_free(tx, zfs_external_acl(zp), 0,
+		    DMU_OBJECT_END);
+	}
+}
+
+#endif
diff --git a/uts/common/fs/zfs/zfs_vfsops.c b/uts/common/fs/zfs/zfs_vfsops.c
new file mode 100644
index 000000000000..4970552d0cb7
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_vfsops.c
@@ -0,0 +1,2303 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2010 Robert Milkowski */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/kmem.h>
+#include <sys/pathname.h>
+#include <sys/vnode.h>
+#include <sys/vfs.h>
+#include <sys/vfs_opreg.h>
+#include <sys/mntent.h>
+#include <sys/mount.h>
+#include <sys/cmn_err.h>
+#include "fs/fs_subr.h"
+#include <sys/zfs_znode.h>
+#include <sys/zfs_dir.h>
+#include <sys/zil.h>
+#include <sys/fs/zfs.h>
+#include <sys/dmu.h>
+#include <sys/dsl_prop.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_deleg.h>
+#include <sys/spa.h>
+#include <sys/zap.h>
+#include <sys/sa.h>
+#include <sys/varargs.h>
+#include <sys/policy.h>
+#include <sys/atomic.h>
+#include <sys/mkdev.h>
+#include <sys/modctl.h>
+#include <sys/refstr.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/zfs_ctldir.h>
+#include <sys/zfs_fuid.h>
+#include <sys/bootconf.h>
+#include <sys/sunddi.h>
+#include <sys/dnlc.h>
+#include <sys/dmu_objset.h>
+#include <sys/spa_boot.h>
+#include <sys/sa.h>
+#include "zfs_comutil.h"
+
+int zfsfstype;
+vfsops_t *zfs_vfsops = NULL;
+static major_t zfs_major;
+static minor_t zfs_minor;
+static kmutex_t	zfs_dev_mtx;
+
+extern int sys_shutdown;
+
+static int zfs_mount(vfs_t *vfsp, vnode_t *mvp, struct mounta *uap, cred_t *cr);
+static int zfs_umount(vfs_t *vfsp, int fflag, cred_t *cr);
+static int zfs_mountroot(vfs_t *vfsp, enum whymountroot);
+static int zfs_root(vfs_t *vfsp, vnode_t **vpp);
+static int zfs_statvfs(vfs_t *vfsp, struct statvfs64 *statp);
+static int zfs_vget(vfs_t *vfsp, vnode_t **vpp, fid_t *fidp);
+static void zfs_freevfs(vfs_t *vfsp);
+
+static const fs_operation_def_t zfs_vfsops_template[] = {
+	VFSNAME_MOUNT,		{ .vfs_mount = zfs_mount },
+	VFSNAME_MOUNTROOT,	{ .vfs_mountroot = zfs_mountroot },
+	VFSNAME_UNMOUNT,	{ .vfs_unmount = zfs_umount },
+	VFSNAME_ROOT,		{ .vfs_root = zfs_root },
+	VFSNAME_STATVFS,	{ .vfs_statvfs = zfs_statvfs },
+	VFSNAME_SYNC,		{ .vfs_sync = zfs_sync },
+	VFSNAME_VGET,		{ .vfs_vget = zfs_vget },
+	VFSNAME_FREEVFS,	{ .vfs_freevfs = zfs_freevfs },
+	NULL,			NULL
+};
+
+static const fs_operation_def_t zfs_vfsops_eio_template[] = {
+	VFSNAME_FREEVFS,	{ .vfs_freevfs =  zfs_freevfs },
+	NULL,			NULL
+};
+
+/*
+ * We need to keep a count of active fs's.
+ * This is necessary to prevent our module
+ * from being unloaded after a umount -f
+ */
+static uint32_t	zfs_active_fs_count = 0;
+
+static char *noatime_cancel[] = { MNTOPT_ATIME, NULL };
+static char *atime_cancel[] = { MNTOPT_NOATIME, NULL };
+static char *noxattr_cancel[] = { MNTOPT_XATTR, NULL };
+static char *xattr_cancel[] = { MNTOPT_NOXATTR, NULL };
+
+/*
+ * MO_DEFAULT is not used since the default value is determined
+ * by the equivalent property.
+ */
+static mntopt_t mntopts[] = {
+	{ MNTOPT_NOXATTR, noxattr_cancel, NULL, 0, NULL },
+	{ MNTOPT_XATTR, xattr_cancel, NULL, 0, NULL },
+	{ MNTOPT_NOATIME, noatime_cancel, NULL, 0, NULL },
+	{ MNTOPT_ATIME, atime_cancel, NULL, 0, NULL }
+};
+
+static mntopts_t zfs_mntopts = {
+	sizeof (mntopts) / sizeof (mntopt_t),
+	mntopts
+};
+
+/*ARGSUSED*/
+int
+zfs_sync(vfs_t *vfsp, short flag, cred_t *cr)
+{
+	/*
+	 * Data integrity is job one.  We don't want a compromised kernel
+	 * writing to the storage pool, so we never sync during panic.
+	 */
+	if (panicstr)
+		return (0);
+
+	/*
+	 * SYNC_ATTR is used by fsflush() to force old filesystems like UFS
+	 * to sync metadata, which they would otherwise cache indefinitely.
+	 * Semantically, the only requirement is that the sync be initiated.
+	 * The DMU syncs out txgs frequently, so there's nothing to do.
+	 */
+	if (flag & SYNC_ATTR)
+		return (0);
+
+	if (vfsp != NULL) {
+		/*
+		 * Sync a specific filesystem.
+		 */
+		zfsvfs_t *zfsvfs = vfsp->vfs_data;
+		dsl_pool_t *dp;
+
+		ZFS_ENTER(zfsvfs);
+		dp = dmu_objset_pool(zfsvfs->z_os);
+
+		/*
+		 * If the system is shutting down, then skip any
+		 * filesystems which may exist on a suspended pool.
+		 */
+		if (sys_shutdown && spa_suspended(dp->dp_spa)) {
+			ZFS_EXIT(zfsvfs);
+			return (0);
+		}
+
+		if (zfsvfs->z_log != NULL)
+			zil_commit(zfsvfs->z_log, 0);
+
+		ZFS_EXIT(zfsvfs);
+	} else {
+		/*
+		 * Sync all ZFS filesystems.  This is what happens when you
+		 * run sync(1M).  Unlike other filesystems, ZFS honors the
+		 * request by waiting for all pools to commit all dirty data.
+		 */
+		spa_sync_allpools();
+	}
+
+	return (0);
+}
+
+static int
+zfs_create_unique_device(dev_t *dev)
+{
+	major_t new_major;
+
+	do {
+		ASSERT3U(zfs_minor, <=, MAXMIN32);
+		minor_t start = zfs_minor;
+		do {
+			mutex_enter(&zfs_dev_mtx);
+			if (zfs_minor >= MAXMIN32) {
+				/*
+				 * If we're still using the real major
+				 * keep out of /dev/zfs and /dev/zvol minor
+				 * number space.  If we're using a getudev()'ed
+				 * major number, we can use all of its minors.
+				 */
+				if (zfs_major == ddi_name_to_major(ZFS_DRIVER))
+					zfs_minor = ZFS_MIN_MINOR;
+				else
+					zfs_minor = 0;
+			} else {
+				zfs_minor++;
+			}
+			*dev = makedevice(zfs_major, zfs_minor);
+			mutex_exit(&zfs_dev_mtx);
+		} while (vfs_devismounted(*dev) && zfs_minor != start);
+		if (zfs_minor == start) {
+			/*
+			 * We are using all ~262,000 minor numbers for the
+			 * current major number.  Create a new major number.
+			 */
+			if ((new_major = getudev()) == (major_t)-1) {
+				cmn_err(CE_WARN,
+				    "zfs_mount: Can't get unique major "
+				    "device number.");
+				return (-1);
+			}
+			mutex_enter(&zfs_dev_mtx);
+			zfs_major = new_major;
+			zfs_minor = 0;
+
+			mutex_exit(&zfs_dev_mtx);
+		} else {
+			break;
+		}
+		/* CONSTANTCONDITION */
+	} while (1);
+
+	return (0);
+}
+
+static void
+atime_changed_cb(void *arg, uint64_t newval)
+{
+	zfsvfs_t *zfsvfs = arg;
+
+	if (newval == TRUE) {
+		zfsvfs->z_atime = TRUE;
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_ATIME, NULL, 0);
+	} else {
+		zfsvfs->z_atime = FALSE;
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_ATIME);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME, NULL, 0);
+	}
+}
+
+static void
+xattr_changed_cb(void *arg, uint64_t newval)
+{
+	zfsvfs_t *zfsvfs = arg;
+
+	if (newval == TRUE) {
+		/* XXX locking on vfs_flag? */
+		zfsvfs->z_vfs->vfs_flag |= VFS_XATTR;
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_XATTR, NULL, 0);
+	} else {
+		/* XXX locking on vfs_flag? */
+		zfsvfs->z_vfs->vfs_flag &= ~VFS_XATTR;
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_XATTR);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR, NULL, 0);
+	}
+}
+
+static void
+blksz_changed_cb(void *arg, uint64_t newval)
+{
+	zfsvfs_t *zfsvfs = arg;
+
+	if (newval < SPA_MINBLOCKSIZE ||
+	    newval > SPA_MAXBLOCKSIZE || !ISP2(newval))
+		newval = SPA_MAXBLOCKSIZE;
+
+	zfsvfs->z_max_blksz = newval;
+	zfsvfs->z_vfs->vfs_bsize = newval;
+}
+
+static void
+readonly_changed_cb(void *arg, uint64_t newval)
+{
+	zfsvfs_t *zfsvfs = arg;
+
+	if (newval) {
+		/* XXX locking on vfs_flag? */
+		zfsvfs->z_vfs->vfs_flag |= VFS_RDONLY;
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RW);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RO, NULL, 0);
+	} else {
+		/* XXX locking on vfs_flag? */
+		zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY;
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RO);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RW, NULL, 0);
+	}
+}
+
+static void
+devices_changed_cb(void *arg, uint64_t newval)
+{
+	zfsvfs_t *zfsvfs = arg;
+
+	if (newval == FALSE) {
+		zfsvfs->z_vfs->vfs_flag |= VFS_NODEVICES;
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_DEVICES);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NODEVICES, NULL, 0);
+	} else {
+		zfsvfs->z_vfs->vfs_flag &= ~VFS_NODEVICES;
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NODEVICES);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_DEVICES, NULL, 0);
+	}
+}
+
+static void
+setuid_changed_cb(void *arg, uint64_t newval)
+{
+	zfsvfs_t *zfsvfs = arg;
+
+	if (newval == FALSE) {
+		zfsvfs->z_vfs->vfs_flag |= VFS_NOSETUID;
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_SETUID);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID, NULL, 0);
+	} else {
+		zfsvfs->z_vfs->vfs_flag &= ~VFS_NOSETUID;
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_SETUID, NULL, 0);
+	}
+}
+
+static void
+exec_changed_cb(void *arg, uint64_t newval)
+{
+	zfsvfs_t *zfsvfs = arg;
+
+	if (newval == FALSE) {
+		zfsvfs->z_vfs->vfs_flag |= VFS_NOEXEC;
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_EXEC);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC, NULL, 0);
+	} else {
+		zfsvfs->z_vfs->vfs_flag &= ~VFS_NOEXEC;
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_EXEC, NULL, 0);
+	}
+}
+
+/*
+ * The nbmand mount option can be changed at mount time.
+ * We can't allow it to be toggled on live file systems or incorrect
+ * behavior may be seen from cifs clients
+ *
+ * This property isn't registered via dsl_prop_register(), but this callback
+ * will be called when a file system is first mounted
+ */
+static void
+nbmand_changed_cb(void *arg, uint64_t newval)
+{
+	zfsvfs_t *zfsvfs = arg;
+	if (newval == FALSE) {
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND, NULL, 0);
+	} else {
+		vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND);
+		vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND, NULL, 0);
+	}
+}
+
+static void
+snapdir_changed_cb(void *arg, uint64_t newval)
+{
+	zfsvfs_t *zfsvfs = arg;
+
+	zfsvfs->z_show_ctldir = newval;
+}
+
+static void
+vscan_changed_cb(void *arg, uint64_t newval)
+{
+	zfsvfs_t *zfsvfs = arg;
+
+	zfsvfs->z_vscan = newval;
+}
+
+static void
+acl_inherit_changed_cb(void *arg, uint64_t newval)
+{
+	zfsvfs_t *zfsvfs = arg;
+
+	zfsvfs->z_acl_inherit = newval;
+}
+
+static int
+zfs_register_callbacks(vfs_t *vfsp)
+{
+	struct dsl_dataset *ds = NULL;
+	objset_t *os = NULL;
+	zfsvfs_t *zfsvfs = NULL;
+	uint64_t nbmand;
+	int readonly, do_readonly = B_FALSE;
+	int setuid, do_setuid = B_FALSE;
+	int exec, do_exec = B_FALSE;
+	int devices, do_devices = B_FALSE;
+	int xattr, do_xattr = B_FALSE;
+	int atime, do_atime = B_FALSE;
+	int error = 0;
+
+	ASSERT(vfsp);
+	zfsvfs = vfsp->vfs_data;
+	ASSERT(zfsvfs);
+	os = zfsvfs->z_os;
+
+	/*
+	 * The act of registering our callbacks will destroy any mount
+	 * options we may have.  In order to enable temporary overrides
+	 * of mount options, we stash away the current values and
+	 * restore them after we register the callbacks.
+	 */
+	if (vfs_optionisset(vfsp, MNTOPT_RO, NULL) ||
+	    !spa_writeable(dmu_objset_spa(os))) {
+		readonly = B_TRUE;
+		do_readonly = B_TRUE;
+	} else if (vfs_optionisset(vfsp, MNTOPT_RW, NULL)) {
+		readonly = B_FALSE;
+		do_readonly = B_TRUE;
+	}
+	if (vfs_optionisset(vfsp, MNTOPT_NOSUID, NULL)) {
+		devices = B_FALSE;
+		setuid = B_FALSE;
+		do_devices = B_TRUE;
+		do_setuid = B_TRUE;
+	} else {
+		if (vfs_optionisset(vfsp, MNTOPT_NODEVICES, NULL)) {
+			devices = B_FALSE;
+			do_devices = B_TRUE;
+		} else if (vfs_optionisset(vfsp, MNTOPT_DEVICES, NULL)) {
+			devices = B_TRUE;
+			do_devices = B_TRUE;
+		}
+
+		if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) {
+			setuid = B_FALSE;
+			do_setuid = B_TRUE;
+		} else if (vfs_optionisset(vfsp, MNTOPT_SETUID, NULL)) {
+			setuid = B_TRUE;
+			do_setuid = B_TRUE;
+		}
+	}
+	if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL)) {
+		exec = B_FALSE;
+		do_exec = B_TRUE;
+	} else if (vfs_optionisset(vfsp, MNTOPT_EXEC, NULL)) {
+		exec = B_TRUE;
+		do_exec = B_TRUE;
+	}
+	if (vfs_optionisset(vfsp, MNTOPT_NOXATTR, NULL)) {
+		xattr = B_FALSE;
+		do_xattr = B_TRUE;
+	} else if (vfs_optionisset(vfsp, MNTOPT_XATTR, NULL)) {
+		xattr = B_TRUE;
+		do_xattr = B_TRUE;
+	}
+	if (vfs_optionisset(vfsp, MNTOPT_NOATIME, NULL)) {
+		atime = B_FALSE;
+		do_atime = B_TRUE;
+	} else if (vfs_optionisset(vfsp, MNTOPT_ATIME, NULL)) {
+		atime = B_TRUE;
+		do_atime = B_TRUE;
+	}
+
+	/*
+	 * nbmand is a special property.  It can only be changed at
+	 * mount time.
+	 *
+	 * This is weird, but it is documented to only be changeable
+	 * at mount time.
+	 */
+	if (vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL)) {
+		nbmand = B_FALSE;
+	} else if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL)) {
+		nbmand = B_TRUE;
+	} else {
+		char osname[MAXNAMELEN];
+
+		dmu_objset_name(os, osname);
+		if (error = dsl_prop_get_integer(osname, "nbmand", &nbmand,
+		    NULL)) {
+			return (error);
+		}
+	}
+
+	/*
+	 * Register property callbacks.
+	 *
+	 * It would probably be fine to just check for i/o error from
+	 * the first prop_register(), but I guess I like to go
+	 * overboard...
+	 */
+	ds = dmu_objset_ds(os);
+	error = dsl_prop_register(ds, "atime", atime_changed_cb, zfsvfs);
+	error = error ? error : dsl_prop_register(ds,
+	    "xattr", xattr_changed_cb, zfsvfs);
+	error = error ? error : dsl_prop_register(ds,
+	    "recordsize", blksz_changed_cb, zfsvfs);
+	error = error ? error : dsl_prop_register(ds,
+	    "readonly", readonly_changed_cb, zfsvfs);
+	error = error ? error : dsl_prop_register(ds,
+	    "devices", devices_changed_cb, zfsvfs);
+	error = error ? error : dsl_prop_register(ds,
+	    "setuid", setuid_changed_cb, zfsvfs);
+	error = error ? error : dsl_prop_register(ds,
+	    "exec", exec_changed_cb, zfsvfs);
+	error = error ? error : dsl_prop_register(ds,
+	    "snapdir", snapdir_changed_cb, zfsvfs);
+	error = error ? error : dsl_prop_register(ds,
+	    "aclinherit", acl_inherit_changed_cb, zfsvfs);
+	error = error ? error : dsl_prop_register(ds,
+	    "vscan", vscan_changed_cb, zfsvfs);
+	if (error)
+		goto unregister;
+
+	/*
+	 * Invoke our callbacks to restore temporary mount options.
+	 */
+	if (do_readonly)
+		readonly_changed_cb(zfsvfs, readonly);
+	if (do_setuid)
+		setuid_changed_cb(zfsvfs, setuid);
+	if (do_exec)
+		exec_changed_cb(zfsvfs, exec);
+	if (do_devices)
+		devices_changed_cb(zfsvfs, devices);
+	if (do_xattr)
+		xattr_changed_cb(zfsvfs, xattr);
+	if (do_atime)
+		atime_changed_cb(zfsvfs, atime);
+
+	nbmand_changed_cb(zfsvfs, nbmand);
+
+	return (0);
+
+unregister:
+	/*
+	 * We may attempt to unregister some callbacks that are not
+	 * registered, but this is OK; it will simply return ENOMSG,
+	 * which we will ignore.
+	 */
+	(void) dsl_prop_unregister(ds, "atime", atime_changed_cb, zfsvfs);
+	(void) dsl_prop_unregister(ds, "xattr", xattr_changed_cb, zfsvfs);
+	(void) dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, zfsvfs);
+	(void) dsl_prop_unregister(ds, "readonly", readonly_changed_cb, zfsvfs);
+	(void) dsl_prop_unregister(ds, "devices", devices_changed_cb, zfsvfs);
+	(void) dsl_prop_unregister(ds, "setuid", setuid_changed_cb, zfsvfs);
+	(void) dsl_prop_unregister(ds, "exec", exec_changed_cb, zfsvfs);
+	(void) dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, zfsvfs);
+	(void) dsl_prop_unregister(ds, "aclinherit", acl_inherit_changed_cb,
+	    zfsvfs);
+	(void) dsl_prop_unregister(ds, "vscan", vscan_changed_cb, zfsvfs);
+	return (error);
+
+}
+
+static int
+zfs_space_delta_cb(dmu_object_type_t bonustype, void *data,
+    uint64_t *userp, uint64_t *groupp)
+{
+	znode_phys_t *znp = data;
+	int error = 0;
+
+	/*
+	 * Is it a valid type of object to track?
+	 */
+	if (bonustype != DMU_OT_ZNODE && bonustype != DMU_OT_SA)
+		return (ENOENT);
+
+	/*
+	 * If we have a NULL data pointer
+	 * then assume the id's aren't changing and
+	 * return EEXIST to the dmu to let it know to
+	 * use the same ids
+	 */
+	if (data == NULL)
+		return (EEXIST);
+
+	if (bonustype == DMU_OT_ZNODE) {
+		*userp = znp->zp_uid;
+		*groupp = znp->zp_gid;
+	} else {
+		int hdrsize;
+
+		ASSERT(bonustype == DMU_OT_SA);
+		hdrsize = sa_hdrsize(data);
+
+		if (hdrsize != 0) {
+			*userp = *((uint64_t *)((uintptr_t)data + hdrsize +
+			    SA_UID_OFFSET));
+			*groupp = *((uint64_t *)((uintptr_t)data + hdrsize +
+			    SA_GID_OFFSET));
+		} else {
+			/*
+			 * This should only happen for newly created
+			 * files that haven't had the znode data filled
+			 * in yet.
+			 */
+			*userp = 0;
+			*groupp = 0;
+		}
+	}
+	return (error);
+}
+
+static void
+fuidstr_to_sid(zfsvfs_t *zfsvfs, const char *fuidstr,
+    char *domainbuf, int buflen, uid_t *ridp)
+{
+	uint64_t fuid;
+	const char *domain;
+
+	fuid = strtonum(fuidstr, NULL);
+
+	domain = zfs_fuid_find_by_idx(zfsvfs, FUID_INDEX(fuid));
+	if (domain)
+		(void) strlcpy(domainbuf, domain, buflen);
+	else
+		domainbuf[0] = '\0';
+	*ridp = FUID_RID(fuid);
+}
+
+static uint64_t
+zfs_userquota_prop_to_obj(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type)
+{
+	switch (type) {
+	case ZFS_PROP_USERUSED:
+		return (DMU_USERUSED_OBJECT);
+	case ZFS_PROP_GROUPUSED:
+		return (DMU_GROUPUSED_OBJECT);
+	case ZFS_PROP_USERQUOTA:
+		return (zfsvfs->z_userquota_obj);
+	case ZFS_PROP_GROUPQUOTA:
+		return (zfsvfs->z_groupquota_obj);
+	}
+	return (0);
+}
+
+int
+zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
+    uint64_t *cookiep, void *vbuf, uint64_t *bufsizep)
+{
+	int error;
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	zfs_useracct_t *buf = vbuf;
+	uint64_t obj;
+
+	if (!dmu_objset_userspace_present(zfsvfs->z_os))
+		return (ENOTSUP);
+
+	obj = zfs_userquota_prop_to_obj(zfsvfs, type);
+	if (obj == 0) {
+		*bufsizep = 0;
+		return (0);
+	}
+
+	for (zap_cursor_init_serialized(&zc, zfsvfs->z_os, obj, *cookiep);
+	    (error = zap_cursor_retrieve(&zc, &za)) == 0;
+	    zap_cursor_advance(&zc)) {
+		if ((uintptr_t)buf - (uintptr_t)vbuf + sizeof (zfs_useracct_t) >
+		    *bufsizep)
+			break;
+
+		fuidstr_to_sid(zfsvfs, za.za_name,
+		    buf->zu_domain, sizeof (buf->zu_domain), &buf->zu_rid);
+
+		buf->zu_space = za.za_first_integer;
+		buf++;
+	}
+	if (error == ENOENT)
+		error = 0;
+
+	ASSERT3U((uintptr_t)buf - (uintptr_t)vbuf, <=, *bufsizep);
+	*bufsizep = (uintptr_t)buf - (uintptr_t)vbuf;
+	*cookiep = zap_cursor_serialize(&zc);
+	zap_cursor_fini(&zc);
+	return (error);
+}
+
+/*
+ * buf must be big enough (eg, 32 bytes)
+ */
+static int
+id_to_fuidstr(zfsvfs_t *zfsvfs, const char *domain, uid_t rid,
+    char *buf, boolean_t addok)
+{
+	uint64_t fuid;
+	int domainid = 0;
+
+	if (domain && domain[0]) {
+		domainid = zfs_fuid_find_by_domain(zfsvfs, domain, NULL, addok);
+		if (domainid == -1)
+			return (ENOENT);
+	}
+	fuid = FUID_ENCODE(domainid, rid);
+	(void) sprintf(buf, "%llx", (longlong_t)fuid);
+	return (0);
+}
+
+int
+zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
+    const char *domain, uint64_t rid, uint64_t *valp)
+{
+	char buf[32];
+	int err;
+	uint64_t obj;
+
+	*valp = 0;
+
+	if (!dmu_objset_userspace_present(zfsvfs->z_os))
+		return (ENOTSUP);
+
+	obj = zfs_userquota_prop_to_obj(zfsvfs, type);
+	if (obj == 0)
+		return (0);
+
+	err = id_to_fuidstr(zfsvfs, domain, rid, buf, B_FALSE);
+	if (err)
+		return (err);
+
+	err = zap_lookup(zfsvfs->z_os, obj, buf, 8, 1, valp);
+	if (err == ENOENT)
+		err = 0;
+	return (err);
+}
+
+int
+zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
+    const char *domain, uint64_t rid, uint64_t quota)
+{
+	char buf[32];
+	int err;
+	dmu_tx_t *tx;
+	uint64_t *objp;
+	boolean_t fuid_dirtied;
+
+	if (type != ZFS_PROP_USERQUOTA && type != ZFS_PROP_GROUPQUOTA)
+		return (EINVAL);
+
+	if (zfsvfs->z_version < ZPL_VERSION_USERSPACE)
+		return (ENOTSUP);
+
+	objp = (type == ZFS_PROP_USERQUOTA) ? &zfsvfs->z_userquota_obj :
+	    &zfsvfs->z_groupquota_obj;
+
+	err = id_to_fuidstr(zfsvfs, domain, rid, buf, B_TRUE);
+	if (err)
+		return (err);
+	fuid_dirtied = zfsvfs->z_fuid_dirty;
+
+	tx = dmu_tx_create(zfsvfs->z_os);
+	dmu_tx_hold_zap(tx, *objp ? *objp : DMU_NEW_OBJECT, B_TRUE, NULL);
+	if (*objp == 0) {
+		dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE,
+		    zfs_userquota_prop_prefixes[type]);
+	}
+	if (fuid_dirtied)
+		zfs_fuid_txhold(zfsvfs, tx);
+	err = dmu_tx_assign(tx, TXG_WAIT);
+	if (err) {
+		dmu_tx_abort(tx);
+		return (err);
+	}
+
+	mutex_enter(&zfsvfs->z_lock);
+	if (*objp == 0) {
+		*objp = zap_create(zfsvfs->z_os, DMU_OT_USERGROUP_QUOTA,
+		    DMU_OT_NONE, 0, tx);
+		VERIFY(0 == zap_add(zfsvfs->z_os, MASTER_NODE_OBJ,
+		    zfs_userquota_prop_prefixes[type], 8, 1, objp, tx));
+	}
+	mutex_exit(&zfsvfs->z_lock);
+
+	if (quota == 0) {
+		err = zap_remove(zfsvfs->z_os, *objp, buf, tx);
+		if (err == ENOENT)
+			err = 0;
+	} else {
+		err = zap_update(zfsvfs->z_os, *objp, buf, 8, 1, &quota, tx);
+	}
+	ASSERT(err == 0);
+	if (fuid_dirtied)
+		zfs_fuid_sync(zfsvfs, tx);
+	dmu_tx_commit(tx);
+	return (err);
+}
+
+boolean_t
+zfs_fuid_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup, uint64_t fuid)
+{
+	char buf[32];
+	uint64_t used, quota, usedobj, quotaobj;
+	int err;
+
+	usedobj = isgroup ? DMU_GROUPUSED_OBJECT : DMU_USERUSED_OBJECT;
+	quotaobj = isgroup ? zfsvfs->z_groupquota_obj : zfsvfs->z_userquota_obj;
+
+	if (quotaobj == 0 || zfsvfs->z_replay)
+		return (B_FALSE);
+
+	(void) sprintf(buf, "%llx", (longlong_t)fuid);
+	err = zap_lookup(zfsvfs->z_os, quotaobj, buf, 8, 1, &quota);
+	if (err != 0)
+		return (B_FALSE);
+
+	err = zap_lookup(zfsvfs->z_os, usedobj, buf, 8, 1, &used);
+	if (err != 0)
+		return (B_FALSE);
+	return (used >= quota);
+}
+
+boolean_t
+zfs_owner_overquota(zfsvfs_t *zfsvfs, znode_t *zp, boolean_t isgroup)
+{
+	uint64_t fuid;
+	uint64_t quotaobj;
+
+	quotaobj = isgroup ? zfsvfs->z_groupquota_obj : zfsvfs->z_userquota_obj;
+
+	fuid = isgroup ? zp->z_gid : zp->z_uid;
+
+	if (quotaobj == 0 || zfsvfs->z_replay)
+		return (B_FALSE);
+
+	return (zfs_fuid_overquota(zfsvfs, isgroup, fuid));
+}
+
+int
+zfsvfs_create(const char *osname, zfsvfs_t **zfvp)
+{
+	objset_t *os;
+	zfsvfs_t *zfsvfs;
+	uint64_t zval;
+	int i, error;
+	uint64_t sa_obj;
+
+	zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP);
+
+	/*
+	 * We claim to always be readonly so we can open snapshots;
+	 * other ZPL code will prevent us from writing to snapshots.
+	 */
+	error = dmu_objset_own(osname, DMU_OST_ZFS, B_TRUE, zfsvfs, &os);
+	if (error) {
+		kmem_free(zfsvfs, sizeof (zfsvfs_t));
+		return (error);
+	}
+
+	/*
+	 * Initialize the zfs-specific filesystem structure.
+	 * Should probably make this a kmem cache, shuffle fields,
+	 * and just bzero up to z_hold_mtx[].
+	 */
+	zfsvfs->z_vfs = NULL;
+	zfsvfs->z_parent = zfsvfs;
+	zfsvfs->z_max_blksz = SPA_MAXBLOCKSIZE;
+	zfsvfs->z_show_ctldir = ZFS_SNAPDIR_VISIBLE;
+	zfsvfs->z_os = os;
+
+	error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zfsvfs->z_version);
+	if (error) {
+		goto out;
+	} else if (zfsvfs->z_version >
+	    zfs_zpl_version_map(spa_version(dmu_objset_spa(os)))) {
+		(void) printf("Can't mount a version %lld file system "
+		    "on a version %lld pool\n. Pool must be upgraded to mount "
+		    "this file system.", (u_longlong_t)zfsvfs->z_version,
+		    (u_longlong_t)spa_version(dmu_objset_spa(os)));
+		error = ENOTSUP;
+		goto out;
+	}
+	if ((error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &zval)) != 0)
+		goto out;
+	zfsvfs->z_norm = (int)zval;
+
+	if ((error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &zval)) != 0)
+		goto out;
+	zfsvfs->z_utf8 = (zval != 0);
+
+	if ((error = zfs_get_zplprop(os, ZFS_PROP_CASE, &zval)) != 0)
+		goto out;
+	zfsvfs->z_case = (uint_t)zval;
+
+	/*
+	 * Fold case on file systems that are always or sometimes case
+	 * insensitive.
+	 */
+	if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE ||
+	    zfsvfs->z_case == ZFS_CASE_MIXED)
+		zfsvfs->z_norm |= U8_TEXTPREP_TOUPPER;
+
+	zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os);
+	zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os);
+
+	if (zfsvfs->z_use_sa) {
+		/* should either have both of these objects or none */
+		error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1,
+		    &sa_obj);
+		if (error)
+			return (error);
+	} else {
+		/*
+		 * Pre SA versions file systems should never touch
+		 * either the attribute registration or layout objects.
+		 */
+		sa_obj = 0;
+	}
+
+	error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END,
+	    &zfsvfs->z_attr_table);
+	if (error)
+		goto out;
+
+	if (zfsvfs->z_version >= ZPL_VERSION_SA)
+		sa_register_update_callback(os, zfs_sa_upgrade);
+
+	error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1,
+	    &zfsvfs->z_root);
+	if (error)
+		goto out;
+	ASSERT(zfsvfs->z_root != 0);
+
+	error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1,
+	    &zfsvfs->z_unlinkedobj);
+	if (error)
+		goto out;
+
+	error = zap_lookup(os, MASTER_NODE_OBJ,
+	    zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA],
+	    8, 1, &zfsvfs->z_userquota_obj);
+	if (error && error != ENOENT)
+		goto out;
+
+	error = zap_lookup(os, MASTER_NODE_OBJ,
+	    zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA],
+	    8, 1, &zfsvfs->z_groupquota_obj);
+	if (error && error != ENOENT)
+		goto out;
+
+	error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1,
+	    &zfsvfs->z_fuid_obj);
+	if (error && error != ENOENT)
+		goto out;
+
+	error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SHARES_DIR, 8, 1,
+	    &zfsvfs->z_shares_dir);
+	if (error && error != ENOENT)
+		goto out;
+
+	mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&zfsvfs->z_lock, NULL, MUTEX_DEFAULT, NULL);
+	list_create(&zfsvfs->z_all_znodes, sizeof (znode_t),
+	    offsetof(znode_t, z_link_node));
+	rrw_init(&zfsvfs->z_teardown_lock);
+	rw_init(&zfsvfs->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL);
+	rw_init(&zfsvfs->z_fuid_lock, NULL, RW_DEFAULT, NULL);
+	for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
+		mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL);
+
+	*zfvp = zfsvfs;
+	return (0);
+
+out:
+	dmu_objset_disown(os, zfsvfs);
+	*zfvp = NULL;
+	kmem_free(zfsvfs, sizeof (zfsvfs_t));
+	return (error);
+}
+
+static int
+zfsvfs_setup(zfsvfs_t *zfsvfs, boolean_t mounting)
+{
+	int error;
+
+	error = zfs_register_callbacks(zfsvfs->z_vfs);
+	if (error)
+		return (error);
+
+	/*
+	 * Set the objset user_ptr to track its zfsvfs.
+	 */
+	mutex_enter(&zfsvfs->z_os->os_user_ptr_lock);
+	dmu_objset_set_user(zfsvfs->z_os, zfsvfs);
+	mutex_exit(&zfsvfs->z_os->os_user_ptr_lock);
+
+	zfsvfs->z_log = zil_open(zfsvfs->z_os, zfs_get_data);
+
+	/*
+	 * If we are not mounting (ie: online recv), then we don't
+	 * have to worry about replaying the log as we blocked all
+	 * operations out since we closed the ZIL.
+	 */
+	if (mounting) {
+		boolean_t readonly;
+
+		/*
+		 * During replay we remove the read only flag to
+		 * allow replays to succeed.
+		 */
+		readonly = zfsvfs->z_vfs->vfs_flag & VFS_RDONLY;
+		if (readonly != 0)
+			zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY;
+		else
+			zfs_unlinked_drain(zfsvfs);
+
+		/*
+		 * Parse and replay the intent log.
+		 *
+		 * Because of ziltest, this must be done after
+		 * zfs_unlinked_drain().  (Further note: ziltest
+		 * doesn't use readonly mounts, where
+		 * zfs_unlinked_drain() isn't called.)  This is because
+		 * ziltest causes spa_sync() to think it's committed,
+		 * but actually it is not, so the intent log contains
+		 * many txg's worth of changes.
+		 *
+		 * In particular, if object N is in the unlinked set in
+		 * the last txg to actually sync, then it could be
+		 * actually freed in a later txg and then reallocated
+		 * in a yet later txg.  This would write a "create
+		 * object N" record to the intent log.  Normally, this
+		 * would be fine because the spa_sync() would have
+		 * written out the fact that object N is free, before
+		 * we could write the "create object N" intent log
+		 * record.
+		 *
+		 * But when we are in ziltest mode, we advance the "open
+		 * txg" without actually spa_sync()-ing the changes to
+		 * disk.  So we would see that object N is still
+		 * allocated and in the unlinked set, and there is an
+		 * intent log record saying to allocate it.
+		 */
+		if (spa_writeable(dmu_objset_spa(zfsvfs->z_os))) {
+			if (zil_replay_disable) {
+				zil_destroy(zfsvfs->z_log, B_FALSE);
+			} else {
+				zfsvfs->z_replay = B_TRUE;
+				zil_replay(zfsvfs->z_os, zfsvfs,
+				    zfs_replay_vector);
+				zfsvfs->z_replay = B_FALSE;
+			}
+		}
+		zfsvfs->z_vfs->vfs_flag |= readonly; /* restore readonly bit */
+	}
+
+	return (0);
+}
+
+void
+zfsvfs_free(zfsvfs_t *zfsvfs)
+{
+	int i;
+	extern krwlock_t zfsvfs_lock; /* in zfs_znode.c */
+
+	/*
+	 * This is a barrier to prevent the filesystem from going away in
+	 * zfs_znode_move() until we can safely ensure that the filesystem is
+	 * not unmounted. We consider the filesystem valid before the barrier
+	 * and invalid after the barrier.
+	 */
+	rw_enter(&zfsvfs_lock, RW_READER);
+	rw_exit(&zfsvfs_lock);
+
+	zfs_fuid_destroy(zfsvfs);
+
+	mutex_destroy(&zfsvfs->z_znodes_lock);
+	mutex_destroy(&zfsvfs->z_lock);
+	list_destroy(&zfsvfs->z_all_znodes);
+	rrw_destroy(&zfsvfs->z_teardown_lock);
+	rw_destroy(&zfsvfs->z_teardown_inactive_lock);
+	rw_destroy(&zfsvfs->z_fuid_lock);
+	for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
+		mutex_destroy(&zfsvfs->z_hold_mtx[i]);
+	kmem_free(zfsvfs, sizeof (zfsvfs_t));
+}
+
+static void
+zfs_set_fuid_feature(zfsvfs_t *zfsvfs)
+{
+	zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os);
+	if (zfsvfs->z_vfs) {
+		if (zfsvfs->z_use_fuids) {
+			vfs_set_feature(zfsvfs->z_vfs, VFSFT_XVATTR);
+			vfs_set_feature(zfsvfs->z_vfs, VFSFT_SYSATTR_VIEWS);
+			vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACEMASKONACCESS);
+			vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACLONCREATE);
+			vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACCESS_FILTER);
+			vfs_set_feature(zfsvfs->z_vfs, VFSFT_REPARSE);
+		} else {
+			vfs_clear_feature(zfsvfs->z_vfs, VFSFT_XVATTR);
+			vfs_clear_feature(zfsvfs->z_vfs, VFSFT_SYSATTR_VIEWS);
+			vfs_clear_feature(zfsvfs->z_vfs, VFSFT_ACEMASKONACCESS);
+			vfs_clear_feature(zfsvfs->z_vfs, VFSFT_ACLONCREATE);
+			vfs_clear_feature(zfsvfs->z_vfs, VFSFT_ACCESS_FILTER);
+			vfs_clear_feature(zfsvfs->z_vfs, VFSFT_REPARSE);
+		}
+	}
+	zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os);
+}
+
+static int
+zfs_domount(vfs_t *vfsp, char *osname)
+{
+	dev_t mount_dev;
+	uint64_t recordsize, fsid_guid;
+	int error = 0;
+	zfsvfs_t *zfsvfs;
+
+	ASSERT(vfsp);
+	ASSERT(osname);
+
+	error = zfsvfs_create(osname, &zfsvfs);
+	if (error)
+		return (error);
+	zfsvfs->z_vfs = vfsp;
+
+	/* Initialize the generic filesystem structure. */
+	vfsp->vfs_bcount = 0;
+	vfsp->vfs_data = NULL;
+
+	if (zfs_create_unique_device(&mount_dev) == -1) {
+		error = ENODEV;
+		goto out;
+	}
+	ASSERT(vfs_devismounted(mount_dev) == 0);
+
+	if (error = dsl_prop_get_integer(osname, "recordsize", &recordsize,
+	    NULL))
+		goto out;
+
+	vfsp->vfs_dev = mount_dev;
+	vfsp->vfs_fstype = zfsfstype;
+	vfsp->vfs_bsize = recordsize;
+	vfsp->vfs_flag |= VFS_NOTRUNC;
+	vfsp->vfs_data = zfsvfs;
+
+	/*
+	 * The fsid is 64 bits, composed of an 8-bit fs type, which
+	 * separates our fsid from any other filesystem types, and a
+	 * 56-bit objset unique ID.  The objset unique ID is unique to
+	 * all objsets open on this system, provided by unique_create().
+	 * The 8-bit fs type must be put in the low bits of fsid[1]
+	 * because that's where other Solaris filesystems put it.
+	 */
+	fsid_guid = dmu_objset_fsid_guid(zfsvfs->z_os);
+	ASSERT((fsid_guid & ~((1ULL<<56)-1)) == 0);
+	vfsp->vfs_fsid.val[0] = fsid_guid;
+	vfsp->vfs_fsid.val[1] = ((fsid_guid>>32) << 8) |
+	    zfsfstype & 0xFF;
+
+	/*
+	 * Set features for file system.
+	 */
+	zfs_set_fuid_feature(zfsvfs);
+	if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE) {
+		vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS);
+		vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE);
+		vfs_set_feature(vfsp, VFSFT_NOCASESENSITIVE);
+	} else if (zfsvfs->z_case == ZFS_CASE_MIXED) {
+		vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS);
+		vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE);
+	}
+	vfs_set_feature(vfsp, VFSFT_ZEROCOPY_SUPPORTED);
+
+	if (dmu_objset_is_snapshot(zfsvfs->z_os)) {
+		uint64_t pval;
+
+		atime_changed_cb(zfsvfs, B_FALSE);
+		readonly_changed_cb(zfsvfs, B_TRUE);
+		if (error = dsl_prop_get_integer(osname, "xattr", &pval, NULL))
+			goto out;
+		xattr_changed_cb(zfsvfs, pval);
+		zfsvfs->z_issnap = B_TRUE;
+		zfsvfs->z_os->os_sync = ZFS_SYNC_DISABLED;
+
+		mutex_enter(&zfsvfs->z_os->os_user_ptr_lock);
+		dmu_objset_set_user(zfsvfs->z_os, zfsvfs);
+		mutex_exit(&zfsvfs->z_os->os_user_ptr_lock);
+	} else {
+		error = zfsvfs_setup(zfsvfs, B_TRUE);
+	}
+
+	if (!zfsvfs->z_issnap)
+		zfsctl_create(zfsvfs);
+out:
+	if (error) {
+		dmu_objset_disown(zfsvfs->z_os, zfsvfs);
+		zfsvfs_free(zfsvfs);
+	} else {
+		atomic_add_32(&zfs_active_fs_count, 1);
+	}
+
+	return (error);
+}
+
+void
+zfs_unregister_callbacks(zfsvfs_t *zfsvfs)
+{
+	objset_t *os = zfsvfs->z_os;
+	struct dsl_dataset *ds;
+
+	/*
+	 * Unregister properties.
+	 */
+	if (!dmu_objset_is_snapshot(os)) {
+		ds = dmu_objset_ds(os);
+		VERIFY(dsl_prop_unregister(ds, "atime", atime_changed_cb,
+		    zfsvfs) == 0);
+
+		VERIFY(dsl_prop_unregister(ds, "xattr", xattr_changed_cb,
+		    zfsvfs) == 0);
+
+		VERIFY(dsl_prop_unregister(ds, "recordsize", blksz_changed_cb,
+		    zfsvfs) == 0);
+
+		VERIFY(dsl_prop_unregister(ds, "readonly", readonly_changed_cb,
+		    zfsvfs) == 0);
+
+		VERIFY(dsl_prop_unregister(ds, "devices", devices_changed_cb,
+		    zfsvfs) == 0);
+
+		VERIFY(dsl_prop_unregister(ds, "setuid", setuid_changed_cb,
+		    zfsvfs) == 0);
+
+		VERIFY(dsl_prop_unregister(ds, "exec", exec_changed_cb,
+		    zfsvfs) == 0);
+
+		VERIFY(dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb,
+		    zfsvfs) == 0);
+
+		VERIFY(dsl_prop_unregister(ds, "aclinherit",
+		    acl_inherit_changed_cb, zfsvfs) == 0);
+
+		VERIFY(dsl_prop_unregister(ds, "vscan",
+		    vscan_changed_cb, zfsvfs) == 0);
+	}
+}
+
+/*
+ * Convert a decimal digit string to a uint64_t integer.
+ */
+static int
+str_to_uint64(char *str, uint64_t *objnum)
+{
+	uint64_t num = 0;
+
+	while (*str) {
+		if (*str < '0' || *str > '9')
+			return (EINVAL);
+
+		num = num*10 + *str++ - '0';
+	}
+
+	*objnum = num;
+	return (0);
+}
+
+/*
+ * The boot path passed from the boot loader is in the form of
+ * "rootpool-name/root-filesystem-object-number'. Convert this
+ * string to a dataset name: "rootpool-name/root-filesystem-name".
+ */
+static int
+zfs_parse_bootfs(char *bpath, char *outpath)
+{
+	char *slashp;
+	uint64_t objnum;
+	int error;
+
+	if (*bpath == 0 || *bpath == '/')
+		return (EINVAL);
+
+	(void) strcpy(outpath, bpath);
+
+	slashp = strchr(bpath, '/');
+
+	/* if no '/', just return the pool name */
+	if (slashp == NULL) {
+		return (0);
+	}
+
+	/* if not a number, just return the root dataset name */
+	if (str_to_uint64(slashp+1, &objnum)) {
+		return (0);
+	}
+
+	*slashp = '\0';
+	error = dsl_dsobj_to_dsname(bpath, objnum, outpath);
+	*slashp = '/';
+
+	return (error);
+}
+
+/*
+ * zfs_check_global_label:
+ *	Check that the hex label string is appropriate for the dataset
+ *	being mounted into the global_zone proper.
+ *
+ *	Return an error if the hex label string is not default or
+ *	admin_low/admin_high.  For admin_low labels, the corresponding
+ *	dataset must be readonly.
+ */
+int
+zfs_check_global_label(const char *dsname, const char *hexsl)
+{
+	if (strcasecmp(hexsl, ZFS_MLSLABEL_DEFAULT) == 0)
+		return (0);
+	if (strcasecmp(hexsl, ADMIN_HIGH) == 0)
+		return (0);
+	if (strcasecmp(hexsl, ADMIN_LOW) == 0) {
+		/* must be readonly */
+		uint64_t rdonly;
+
+		if (dsl_prop_get_integer(dsname,
+		    zfs_prop_to_name(ZFS_PROP_READONLY), &rdonly, NULL))
+			return (EACCES);
+		return (rdonly ? 0 : EACCES);
+	}
+	return (EACCES);
+}
+
+/*
+ * zfs_mount_label_policy:
+ *	Determine whether the mount is allowed according to MAC check.
+ *	by comparing (where appropriate) label of the dataset against
+ *	the label of the zone being mounted into.  If the dataset has
+ *	no label, create one.
+ *
+ *	Returns:
+ *		 0 :	access allowed
+ *		>0 :	error code, such as EACCES
+ */
+static int
+zfs_mount_label_policy(vfs_t *vfsp, char *osname)
+{
+	int		error, retv;
+	zone_t		*mntzone = NULL;
+	ts_label_t	*mnt_tsl;
+	bslabel_t	*mnt_sl;
+	bslabel_t	ds_sl;
+	char		ds_hexsl[MAXNAMELEN];
+
+	retv = EACCES;				/* assume the worst */
+
+	/*
+	 * Start by getting the dataset label if it exists.
+	 */
+	error = dsl_prop_get(osname, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
+	    1, sizeof (ds_hexsl), &ds_hexsl, NULL);
+	if (error)
+		return (EACCES);
+
+	/*
+	 * If labeling is NOT enabled, then disallow the mount of datasets
+	 * which have a non-default label already.  No other label checks
+	 * are needed.
+	 */
+	if (!is_system_labeled()) {
+		if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) == 0)
+			return (0);
+		return (EACCES);
+	}
+
+	/*
+	 * Get the label of the mountpoint.  If mounting into the global
+	 * zone (i.e. mountpoint is not within an active zone and the
+	 * zoned property is off), the label must be default or
+	 * admin_low/admin_high only; no other checks are needed.
+	 */
+	mntzone = zone_find_by_any_path(refstr_value(vfsp->vfs_mntpt), B_FALSE);
+	if (mntzone->zone_id == GLOBAL_ZONEID) {
+		uint64_t zoned;
+
+		zone_rele(mntzone);
+
+		if (dsl_prop_get_integer(osname,
+		    zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
+			return (EACCES);
+		if (!zoned)
+			return (zfs_check_global_label(osname, ds_hexsl));
+		else
+			/*
+			 * This is the case of a zone dataset being mounted
+			 * initially, before the zone has been fully created;
+			 * allow this mount into global zone.
+			 */
+			return (0);
+	}
+
+	mnt_tsl = mntzone->zone_slabel;
+	ASSERT(mnt_tsl != NULL);
+	label_hold(mnt_tsl);
+	mnt_sl = label2bslabel(mnt_tsl);
+
+	if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) == 0) {
+		/*
+		 * The dataset doesn't have a real label, so fabricate one.
+		 */
+		char *str = NULL;
+
+		if (l_to_str_internal(mnt_sl, &str) == 0 &&
+		    dsl_prop_set(osname, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
+		    ZPROP_SRC_LOCAL, 1, strlen(str) + 1, str) == 0)
+			retv = 0;
+		if (str != NULL)
+			kmem_free(str, strlen(str) + 1);
+	} else if (hexstr_to_label(ds_hexsl, &ds_sl) == 0) {
+		/*
+		 * Now compare labels to complete the MAC check.  If the
+		 * labels are equal then allow access.  If the mountpoint
+		 * label dominates the dataset label, allow readonly access.
+		 * Otherwise, access is denied.
+		 */
+		if (blequal(mnt_sl, &ds_sl))
+			retv = 0;
+		else if (bldominates(mnt_sl, &ds_sl)) {
+			vfs_setmntopt(vfsp, MNTOPT_RO, NULL, 0);
+			retv = 0;
+		}
+	}
+
+	label_rele(mnt_tsl);
+	zone_rele(mntzone);
+	return (retv);
+}
+
+static int
+zfs_mountroot(vfs_t *vfsp, enum whymountroot why)
+{
+	int error = 0;
+	static int zfsrootdone = 0;
+	zfsvfs_t *zfsvfs = NULL;
+	znode_t *zp = NULL;
+	vnode_t *vp = NULL;
+	char *zfs_bootfs;
+	char *zfs_devid;
+
+	ASSERT(vfsp);
+
+	/*
+	 * The filesystem that we mount as root is defined in the
+	 * boot property "zfs-bootfs" with a format of
+	 * "poolname/root-dataset-objnum".
+	 */
+	if (why == ROOT_INIT) {
+		if (zfsrootdone++)
+			return (EBUSY);
+		/*
+		 * the process of doing a spa_load will require the
+		 * clock to be set before we could (for example) do
+		 * something better by looking at the timestamp on
+		 * an uberblock, so just set it to -1.
+		 */
+		clkset(-1);
+
+		if ((zfs_bootfs = spa_get_bootprop("zfs-bootfs")) == NULL) {
+			cmn_err(CE_NOTE, "spa_get_bootfs: can not get "
+			    "bootfs name");
+			return (EINVAL);
+		}
+		zfs_devid = spa_get_bootprop("diskdevid");
+		error = spa_import_rootpool(rootfs.bo_name, zfs_devid);
+		if (zfs_devid)
+			spa_free_bootprop(zfs_devid);
+		if (error) {
+			spa_free_bootprop(zfs_bootfs);
+			cmn_err(CE_NOTE, "spa_import_rootpool: error %d",
+			    error);
+			return (error);
+		}
+		if (error = zfs_parse_bootfs(zfs_bootfs, rootfs.bo_name)) {
+			spa_free_bootprop(zfs_bootfs);
+			cmn_err(CE_NOTE, "zfs_parse_bootfs: error %d",
+			    error);
+			return (error);
+		}
+
+		spa_free_bootprop(zfs_bootfs);
+
+		if (error = vfs_lock(vfsp))
+			return (error);
+
+		if (error = zfs_domount(vfsp, rootfs.bo_name)) {
+			cmn_err(CE_NOTE, "zfs_domount: error %d", error);
+			goto out;
+		}
+
+		zfsvfs = (zfsvfs_t *)vfsp->vfs_data;
+		ASSERT(zfsvfs);
+		if (error = zfs_zget(zfsvfs, zfsvfs->z_root, &zp)) {
+			cmn_err(CE_NOTE, "zfs_zget: error %d", error);
+			goto out;
+		}
+
+		vp = ZTOV(zp);
+		mutex_enter(&vp->v_lock);
+		vp->v_flag |= VROOT;
+		mutex_exit(&vp->v_lock);
+		rootvp = vp;
+
+		/*
+		 * Leave rootvp held.  The root file system is never unmounted.
+		 */
+
+		vfs_add((struct vnode *)0, vfsp,
+		    (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0);
+out:
+		vfs_unlock(vfsp);
+		return (error);
+	} else if (why == ROOT_REMOUNT) {
+		readonly_changed_cb(vfsp->vfs_data, B_FALSE);
+		vfsp->vfs_flag |= VFS_REMOUNT;
+
+		/* refresh mount options */
+		zfs_unregister_callbacks(vfsp->vfs_data);
+		return (zfs_register_callbacks(vfsp));
+
+	} else if (why == ROOT_UNMOUNT) {
+		zfs_unregister_callbacks((zfsvfs_t *)vfsp->vfs_data);
+		(void) zfs_sync(vfsp, 0, 0);
+		return (0);
+	}
+
+	/*
+	 * if "why" is equal to anything else other than ROOT_INIT,
+	 * ROOT_REMOUNT, or ROOT_UNMOUNT, we do not support it.
+	 */
+	return (ENOTSUP);
+}
+
+/*ARGSUSED*/
+static int
+zfs_mount(vfs_t *vfsp, vnode_t *mvp, struct mounta *uap, cred_t *cr)
+{
+	char		*osname;
+	pathname_t	spn;
+	int		error = 0;
+	uio_seg_t	fromspace = (uap->flags & MS_SYSSPACE) ?
+	    UIO_SYSSPACE : UIO_USERSPACE;
+	int		canwrite;
+
+	if (mvp->v_type != VDIR)
+		return (ENOTDIR);
+
+	mutex_enter(&mvp->v_lock);
+	if ((uap->flags & MS_REMOUNT) == 0 &&
+	    (uap->flags & MS_OVERLAY) == 0 &&
+	    (mvp->v_count != 1 || (mvp->v_flag & VROOT))) {
+		mutex_exit(&mvp->v_lock);
+		return (EBUSY);
+	}
+	mutex_exit(&mvp->v_lock);
+
+	/*
+	 * ZFS does not support passing unparsed data in via MS_DATA.
+	 * Users should use the MS_OPTIONSTR interface; this means
+	 * that all option parsing is already done and the options struct
+	 * can be interrogated.
+	 */
+	if ((uap->flags & MS_DATA) && uap->datalen > 0)
+		return (EINVAL);
+
+	/*
+	 * Get the objset name (the "special" mount argument).
+	 */
+	if (error = pn_get(uap->spec, fromspace, &spn))
+		return (error);
+
+	osname = spn.pn_path;
+
+	/*
+	 * Check for mount privilege?
+	 *
+	 * If we don't have privilege then see if
+	 * we have local permission to allow it
+	 */
+	error = secpolicy_fs_mount(cr, mvp, vfsp);
+	if (error) {
+		if (dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr) == 0) {
+			vattr_t		vattr;
+
+			/*
+			 * Make sure user is the owner of the mount point
+			 * or has sufficient privileges.
+			 */
+
+			vattr.va_mask = AT_UID;
+
+			if (VOP_GETATTR(mvp, &vattr, 0, cr, NULL)) {
+				goto out;
+			}
+
+			if (secpolicy_vnode_owner(cr, vattr.va_uid) != 0 &&
+			    VOP_ACCESS(mvp, VWRITE, 0, cr, NULL) != 0) {
+				goto out;
+			}
+			secpolicy_fs_mount_clearopts(cr, vfsp);
+		} else {
+			goto out;
+		}
+	}
+
+	/*
+	 * Refuse to mount a filesystem if we are in a local zone and the
+	 * dataset is not visible.
+	 */
+	if (!INGLOBALZONE(curproc) &&
+	    (!zone_dataset_visible(osname, &canwrite) || !canwrite)) {
+		error = EPERM;
+		goto out;
+	}
+
+	error = zfs_mount_label_policy(vfsp, osname);
+	if (error)
+		goto out;
+
+	/*
+	 * When doing a remount, we simply refresh our temporary properties
+	 * according to those options set in the current VFS options.
+	 */
+	if (uap->flags & MS_REMOUNT) {
+		/* refresh mount options */
+		zfs_unregister_callbacks(vfsp->vfs_data);
+		error = zfs_register_callbacks(vfsp);
+		goto out;
+	}
+
+	error = zfs_domount(vfsp, osname);
+
+	/*
+	 * Add an extra VFS_HOLD on our parent vfs so that it can't
+	 * disappear due to a forced unmount.
+	 */
+	if (error == 0 && ((zfsvfs_t *)vfsp->vfs_data)->z_issnap)
+		VFS_HOLD(mvp->v_vfsp);
+
+out:
+	pn_free(&spn);
+	return (error);
+}
+
+static int
+zfs_statvfs(vfs_t *vfsp, struct statvfs64 *statp)
+{
+	zfsvfs_t *zfsvfs = vfsp->vfs_data;
+	dev32_t d32;
+	uint64_t refdbytes, availbytes, usedobjs, availobjs;
+
+	ZFS_ENTER(zfsvfs);
+
+	dmu_objset_space(zfsvfs->z_os,
+	    &refdbytes, &availbytes, &usedobjs, &availobjs);
+
+	/*
+	 * The underlying storage pool actually uses multiple block sizes.
+	 * We report the fragsize as the smallest block size we support,
+	 * and we report our blocksize as the filesystem's maximum blocksize.
+	 */
+	statp->f_frsize = 1UL << SPA_MINBLOCKSHIFT;
+	statp->f_bsize = zfsvfs->z_max_blksz;
+
+	/*
+	 * The following report "total" blocks of various kinds in the
+	 * file system, but reported in terms of f_frsize - the
+	 * "fragment" size.
+	 */
+
+	statp->f_blocks = (refdbytes + availbytes) >> SPA_MINBLOCKSHIFT;
+	statp->f_bfree = availbytes >> SPA_MINBLOCKSHIFT;
+	statp->f_bavail = statp->f_bfree; /* no root reservation */
+
+	/*
+	 * statvfs() should really be called statufs(), because it assumes
+	 * static metadata.  ZFS doesn't preallocate files, so the best
+	 * we can do is report the max that could possibly fit in f_files,
+	 * and that minus the number actually used in f_ffree.
+	 * For f_ffree, report the smaller of the number of object available
+	 * and the number of blocks (each object will take at least a block).
+	 */
+	statp->f_ffree = MIN(availobjs, statp->f_bfree);
+	statp->f_favail = statp->f_ffree;	/* no "root reservation" */
+	statp->f_files = statp->f_ffree + usedobjs;
+
+	(void) cmpldev(&d32, vfsp->vfs_dev);
+	statp->f_fsid = d32;
+
+	/*
+	 * We're a zfs filesystem.
+	 */
+	(void) strcpy(statp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name);
+
+	statp->f_flag = vf_to_stf(vfsp->vfs_flag);
+
+	statp->f_namemax = ZFS_MAXNAMELEN;
+
+	/*
+	 * We have all of 32 characters to stuff a string here.
+	 * Is there anything useful we could/should provide?
+	 */
+	bzero(statp->f_fstr, sizeof (statp->f_fstr));
+
+	ZFS_EXIT(zfsvfs);
+	return (0);
+}
+
+static int
+zfs_root(vfs_t *vfsp, vnode_t **vpp)
+{
+	zfsvfs_t *zfsvfs = vfsp->vfs_data;
+	znode_t *rootzp;
+	int error;
+
+	ZFS_ENTER(zfsvfs);
+
+	error = zfs_zget(zfsvfs, zfsvfs->z_root, &rootzp);
+	if (error == 0)
+		*vpp = ZTOV(rootzp);
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * Teardown the zfsvfs::z_os.
+ *
+ * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock'
+ * and 'z_teardown_inactive_lock' held.
+ */
+static int
+zfsvfs_teardown(zfsvfs_t *zfsvfs, boolean_t unmounting)
+{
+	znode_t	*zp;
+
+	rrw_enter(&zfsvfs->z_teardown_lock, RW_WRITER, FTAG);
+
+	if (!unmounting) {
+		/*
+		 * We purge the parent filesystem's vfsp as the parent
+		 * filesystem and all of its snapshots have their vnode's
+		 * v_vfsp set to the parent's filesystem's vfsp.  Note,
+		 * 'z_parent' is self referential for non-snapshots.
+		 */
+		(void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0);
+	}
+
+	/*
+	 * Close the zil. NB: Can't close the zil while zfs_inactive
+	 * threads are blocked as zil_close can call zfs_inactive.
+	 */
+	if (zfsvfs->z_log) {
+		zil_close(zfsvfs->z_log);
+		zfsvfs->z_log = NULL;
+	}
+
+	rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_WRITER);
+
+	/*
+	 * If we are not unmounting (ie: online recv) and someone already
+	 * unmounted this file system while we were doing the switcheroo,
+	 * or a reopen of z_os failed then just bail out now.
+	 */
+	if (!unmounting && (zfsvfs->z_unmounted || zfsvfs->z_os == NULL)) {
+		rw_exit(&zfsvfs->z_teardown_inactive_lock);
+		rrw_exit(&zfsvfs->z_teardown_lock, FTAG);
+		return (EIO);
+	}
+
+	/*
+	 * At this point there are no vops active, and any new vops will
+	 * fail with EIO since we have z_teardown_lock for writer (only
+	 * relavent for forced unmount).
+	 *
+	 * Release all holds on dbufs.
+	 */
+	mutex_enter(&zfsvfs->z_znodes_lock);
+	for (zp = list_head(&zfsvfs->z_all_znodes); zp != NULL;
+	    zp = list_next(&zfsvfs->z_all_znodes, zp))
+		if (zp->z_sa_hdl) {
+			ASSERT(ZTOV(zp)->v_count > 0);
+			zfs_znode_dmu_fini(zp);
+		}
+	mutex_exit(&zfsvfs->z_znodes_lock);
+
+	/*
+	 * If we are unmounting, set the unmounted flag and let new vops
+	 * unblock.  zfs_inactive will have the unmounted behavior, and all
+	 * other vops will fail with EIO.
+	 */
+	if (unmounting) {
+		zfsvfs->z_unmounted = B_TRUE;
+		rrw_exit(&zfsvfs->z_teardown_lock, FTAG);
+		rw_exit(&zfsvfs->z_teardown_inactive_lock);
+	}
+
+	/*
+	 * z_os will be NULL if there was an error in attempting to reopen
+	 * zfsvfs, so just return as the properties had already been
+	 * unregistered and cached data had been evicted before.
+	 */
+	if (zfsvfs->z_os == NULL)
+		return (0);
+
+	/*
+	 * Unregister properties.
+	 */
+	zfs_unregister_callbacks(zfsvfs);
+
+	/*
+	 * Evict cached data
+	 */
+	if (dmu_objset_is_dirty_anywhere(zfsvfs->z_os))
+		if (!(zfsvfs->z_vfs->vfs_flag & VFS_RDONLY))
+			txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), 0);
+	(void) dmu_objset_evict_dbufs(zfsvfs->z_os);
+
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+zfs_umount(vfs_t *vfsp, int fflag, cred_t *cr)
+{
+	zfsvfs_t *zfsvfs = vfsp->vfs_data;
+	objset_t *os;
+	int ret;
+
+	ret = secpolicy_fs_unmount(cr, vfsp);
+	if (ret) {
+		if (dsl_deleg_access((char *)refstr_value(vfsp->vfs_resource),
+		    ZFS_DELEG_PERM_MOUNT, cr))
+			return (ret);
+	}
+
+	/*
+	 * We purge the parent filesystem's vfsp as the parent filesystem
+	 * and all of its snapshots have their vnode's v_vfsp set to the
+	 * parent's filesystem's vfsp.  Note, 'z_parent' is self
+	 * referential for non-snapshots.
+	 */
+	(void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0);
+
+	/*
+	 * Unmount any snapshots mounted under .zfs before unmounting the
+	 * dataset itself.
+	 */
+	if (zfsvfs->z_ctldir != NULL &&
+	    (ret = zfsctl_umount_snapshots(vfsp, fflag, cr)) != 0) {
+		return (ret);
+	}
+
+	if (!(fflag & MS_FORCE)) {
+		/*
+		 * Check the number of active vnodes in the file system.
+		 * Our count is maintained in the vfs structure, but the
+		 * number is off by 1 to indicate a hold on the vfs
+		 * structure itself.
+		 *
+		 * The '.zfs' directory maintains a reference of its
+		 * own, and any active references underneath are
+		 * reflected in the vnode count.
+		 */
+		if (zfsvfs->z_ctldir == NULL) {
+			if (vfsp->vfs_count > 1)
+				return (EBUSY);
+		} else {
+			if (vfsp->vfs_count > 2 ||
+			    zfsvfs->z_ctldir->v_count > 1)
+				return (EBUSY);
+		}
+	}
+
+	vfsp->vfs_flag |= VFS_UNMOUNTED;
+
+	VERIFY(zfsvfs_teardown(zfsvfs, B_TRUE) == 0);
+	os = zfsvfs->z_os;
+
+	/*
+	 * z_os will be NULL if there was an error in
+	 * attempting to reopen zfsvfs.
+	 */
+	if (os != NULL) {
+		/*
+		 * Unset the objset user_ptr.
+		 */
+		mutex_enter(&os->os_user_ptr_lock);
+		dmu_objset_set_user(os, NULL);
+		mutex_exit(&os->os_user_ptr_lock);
+
+		/*
+		 * Finally release the objset
+		 */
+		dmu_objset_disown(os, zfsvfs);
+	}
+
+	/*
+	 * We can now safely destroy the '.zfs' directory node.
+	 */
+	if (zfsvfs->z_ctldir != NULL)
+		zfsctl_destroy(zfsvfs);
+
+	return (0);
+}
+
+static int
+zfs_vget(vfs_t *vfsp, vnode_t **vpp, fid_t *fidp)
+{
+	zfsvfs_t	*zfsvfs = vfsp->vfs_data;
+	znode_t		*zp;
+	uint64_t	object = 0;
+	uint64_t	fid_gen = 0;
+	uint64_t	gen_mask;
+	uint64_t	zp_gen;
+	int 		i, err;
+
+	*vpp = NULL;
+
+	ZFS_ENTER(zfsvfs);
+
+	if (fidp->fid_len == LONG_FID_LEN) {
+		zfid_long_t	*zlfid = (zfid_long_t *)fidp;
+		uint64_t	objsetid = 0;
+		uint64_t	setgen = 0;
+
+		for (i = 0; i < sizeof (zlfid->zf_setid); i++)
+			objsetid |= ((uint64_t)zlfid->zf_setid[i]) << (8 * i);
+
+		for (i = 0; i < sizeof (zlfid->zf_setgen); i++)
+			setgen |= ((uint64_t)zlfid->zf_setgen[i]) << (8 * i);
+
+		ZFS_EXIT(zfsvfs);
+
+		err = zfsctl_lookup_objset(vfsp, objsetid, &zfsvfs);
+		if (err)
+			return (EINVAL);
+		ZFS_ENTER(zfsvfs);
+	}
+
+	if (fidp->fid_len == SHORT_FID_LEN || fidp->fid_len == LONG_FID_LEN) {
+		zfid_short_t	*zfid = (zfid_short_t *)fidp;
+
+		for (i = 0; i < sizeof (zfid->zf_object); i++)
+			object |= ((uint64_t)zfid->zf_object[i]) << (8 * i);
+
+		for (i = 0; i < sizeof (zfid->zf_gen); i++)
+			fid_gen |= ((uint64_t)zfid->zf_gen[i]) << (8 * i);
+	} else {
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+	/* A zero fid_gen means we are in the .zfs control directories */
+	if (fid_gen == 0 &&
+	    (object == ZFSCTL_INO_ROOT || object == ZFSCTL_INO_SNAPDIR)) {
+		*vpp = zfsvfs->z_ctldir;
+		ASSERT(*vpp != NULL);
+		if (object == ZFSCTL_INO_SNAPDIR) {
+			VERIFY(zfsctl_root_lookup(*vpp, "snapshot", vpp, NULL,
+			    0, NULL, NULL, NULL, NULL, NULL) == 0);
+		} else {
+			VN_HOLD(*vpp);
+		}
+		ZFS_EXIT(zfsvfs);
+		return (0);
+	}
+
+	gen_mask = -1ULL >> (64 - 8 * i);
+
+	dprintf("getting %llu [%u mask %llx]\n", object, fid_gen, gen_mask);
+	if (err = zfs_zget(zfsvfs, object, &zp)) {
+		ZFS_EXIT(zfsvfs);
+		return (err);
+	}
+	(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs), &zp_gen,
+	    sizeof (uint64_t));
+	zp_gen = zp_gen & gen_mask;
+	if (zp_gen == 0)
+		zp_gen = 1;
+	if (zp->z_unlinked || zp_gen != fid_gen) {
+		dprintf("znode gen (%u) != fid gen (%u)\n", zp_gen, fid_gen);
+		VN_RELE(ZTOV(zp));
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+	*vpp = ZTOV(zp);
+	ZFS_EXIT(zfsvfs);
+	return (0);
+}
+
+/*
+ * Block out VOPs and close zfsvfs_t::z_os
+ *
+ * Note, if successful, then we return with the 'z_teardown_lock' and
+ * 'z_teardown_inactive_lock' write held.
+ */
+int
+zfs_suspend_fs(zfsvfs_t *zfsvfs)
+{
+	int error;
+
+	if ((error = zfsvfs_teardown(zfsvfs, B_FALSE)) != 0)
+		return (error);
+	dmu_objset_disown(zfsvfs->z_os, zfsvfs);
+
+	return (0);
+}
+
+/*
+ * Reopen zfsvfs_t::z_os and release VOPs.
+ */
+int
+zfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname)
+{
+	int err;
+
+	ASSERT(RRW_WRITE_HELD(&zfsvfs->z_teardown_lock));
+	ASSERT(RW_WRITE_HELD(&zfsvfs->z_teardown_inactive_lock));
+
+	err = dmu_objset_own(osname, DMU_OST_ZFS, B_FALSE, zfsvfs,
+	    &zfsvfs->z_os);
+	if (err) {
+		zfsvfs->z_os = NULL;
+	} else {
+		znode_t *zp;
+		uint64_t sa_obj = 0;
+
+		/*
+		 * Make sure version hasn't changed
+		 */
+
+		err = zfs_get_zplprop(zfsvfs->z_os, ZFS_PROP_VERSION,
+		    &zfsvfs->z_version);
+
+		if (err)
+			goto bail;
+
+		err = zap_lookup(zfsvfs->z_os, MASTER_NODE_OBJ,
+		    ZFS_SA_ATTRS, 8, 1, &sa_obj);
+
+		if (err && zfsvfs->z_version >= ZPL_VERSION_SA)
+			goto bail;
+
+		if ((err = sa_setup(zfsvfs->z_os, sa_obj,
+		    zfs_attr_table,  ZPL_END, &zfsvfs->z_attr_table)) != 0)
+			goto bail;
+
+		if (zfsvfs->z_version >= ZPL_VERSION_SA)
+			sa_register_update_callback(zfsvfs->z_os,
+			    zfs_sa_upgrade);
+
+		VERIFY(zfsvfs_setup(zfsvfs, B_FALSE) == 0);
+
+		zfs_set_fuid_feature(zfsvfs);
+
+		/*
+		 * Attempt to re-establish all the active znodes with
+		 * their dbufs.  If a zfs_rezget() fails, then we'll let
+		 * any potential callers discover that via ZFS_ENTER_VERIFY_VP
+		 * when they try to use their znode.
+		 */
+		mutex_enter(&zfsvfs->z_znodes_lock);
+		for (zp = list_head(&zfsvfs->z_all_znodes); zp;
+		    zp = list_next(&zfsvfs->z_all_znodes, zp)) {
+			(void) zfs_rezget(zp);
+		}
+		mutex_exit(&zfsvfs->z_znodes_lock);
+	}
+
+bail:
+	/* release the VOPs */
+	rw_exit(&zfsvfs->z_teardown_inactive_lock);
+	rrw_exit(&zfsvfs->z_teardown_lock, FTAG);
+
+	if (err) {
+		/*
+		 * Since we couldn't reopen zfsvfs::z_os, or
+		 * setup the sa framework force unmount this file system.
+		 */
+		if (vn_vfswlock(zfsvfs->z_vfs->vfs_vnodecovered) == 0)
+			(void) dounmount(zfsvfs->z_vfs, MS_FORCE, CRED());
+	}
+	return (err);
+}
+
+static void
+zfs_freevfs(vfs_t *vfsp)
+{
+	zfsvfs_t *zfsvfs = vfsp->vfs_data;
+
+	/*
+	 * If this is a snapshot, we have an extra VFS_HOLD on our parent
+	 * from zfs_mount().  Release it here.  If we came through
+	 * zfs_mountroot() instead, we didn't grab an extra hold, so
+	 * skip the VFS_RELE for rootvfs.
+	 */
+	if (zfsvfs->z_issnap && (vfsp != rootvfs))
+		VFS_RELE(zfsvfs->z_parent->z_vfs);
+
+	zfsvfs_free(zfsvfs);
+
+	atomic_add_32(&zfs_active_fs_count, -1);
+}
+
+/*
+ * VFS_INIT() initialization.  Note that there is no VFS_FINI(),
+ * so we can't safely do any non-idempotent initialization here.
+ * Leave that to zfs_init() and zfs_fini(), which are called
+ * from the module's _init() and _fini() entry points.
+ */
+/*ARGSUSED*/
+static int
+zfs_vfsinit(int fstype, char *name)
+{
+	int error;
+
+	zfsfstype = fstype;
+
+	/*
+	 * Setup vfsops and vnodeops tables.
+	 */
+	error = vfs_setfsops(fstype, zfs_vfsops_template, &zfs_vfsops);
+	if (error != 0) {
+		cmn_err(CE_WARN, "zfs: bad vfs ops template");
+	}
+
+	error = zfs_create_op_tables();
+	if (error) {
+		zfs_remove_op_tables();
+		cmn_err(CE_WARN, "zfs: bad vnode ops template");
+		(void) vfs_freevfsops_by_type(zfsfstype);
+		return (error);
+	}
+
+	mutex_init(&zfs_dev_mtx, NULL, MUTEX_DEFAULT, NULL);
+
+	/*
+	 * Unique major number for all zfs mounts.
+	 * If we run out of 32-bit minors, we'll getudev() another major.
+	 */
+	zfs_major = ddi_name_to_major(ZFS_DRIVER);
+	zfs_minor = ZFS_MIN_MINOR;
+
+	return (0);
+}
+
+void
+zfs_init(void)
+{
+	/*
+	 * Initialize .zfs directory structures
+	 */
+	zfsctl_init();
+
+	/*
+	 * Initialize znode cache, vnode ops, etc...
+	 */
+	zfs_znode_init();
+
+	dmu_objset_register_type(DMU_OST_ZFS, zfs_space_delta_cb);
+}
+
+void
+zfs_fini(void)
+{
+	zfsctl_fini();
+	zfs_znode_fini();
+}
+
+int
+zfs_busy(void)
+{
+	return (zfs_active_fs_count != 0);
+}
+
+int
+zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers)
+{
+	int error;
+	objset_t *os = zfsvfs->z_os;
+	dmu_tx_t *tx;
+
+	if (newvers < ZPL_VERSION_INITIAL || newvers > ZPL_VERSION)
+		return (EINVAL);
+
+	if (newvers < zfsvfs->z_version)
+		return (EINVAL);
+
+	if (zfs_spa_version_map(newvers) >
+	    spa_version(dmu_objset_spa(zfsvfs->z_os)))
+		return (ENOTSUP);
+
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_FALSE, ZPL_VERSION_STR);
+	if (newvers >= ZPL_VERSION_SA && !zfsvfs->z_use_sa) {
+		dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE,
+		    ZFS_SA_ATTRS);
+		dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
+	}
+	error = dmu_tx_assign(tx, TXG_WAIT);
+	if (error) {
+		dmu_tx_abort(tx);
+		return (error);
+	}
+
+	error = zap_update(os, MASTER_NODE_OBJ, ZPL_VERSION_STR,
+	    8, 1, &newvers, tx);
+
+	if (error) {
+		dmu_tx_commit(tx);
+		return (error);
+	}
+
+	if (newvers >= ZPL_VERSION_SA && !zfsvfs->z_use_sa) {
+		uint64_t sa_obj;
+
+		ASSERT3U(spa_version(dmu_objset_spa(zfsvfs->z_os)), >=,
+		    SPA_VERSION_SA);
+		sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE,
+		    DMU_OT_NONE, 0, tx);
+
+		error = zap_add(os, MASTER_NODE_OBJ,
+		    ZFS_SA_ATTRS, 8, 1, &sa_obj, tx);
+		ASSERT3U(error, ==, 0);
+
+		VERIFY(0 == sa_set_sa_object(os, sa_obj));
+		sa_register_update_callback(os, zfs_sa_upgrade);
+	}
+
+	spa_history_log_internal(LOG_DS_UPGRADE,
+	    dmu_objset_spa(os), tx, "oldver=%llu newver=%llu dataset = %llu",
+	    zfsvfs->z_version, newvers, dmu_objset_id(os));
+
+	dmu_tx_commit(tx);
+
+	zfsvfs->z_version = newvers;
+
+	zfs_set_fuid_feature(zfsvfs);
+
+	return (0);
+}
+
+/*
+ * Read a property stored within the master node.
+ */
+int
+zfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value)
+{
+	const char *pname;
+	int error = ENOENT;
+
+	/*
+	 * Look up the file system's value for the property.  For the
+	 * version property, we look up a slightly different string.
+	 */
+	if (prop == ZFS_PROP_VERSION)
+		pname = ZPL_VERSION_STR;
+	else
+		pname = zfs_prop_to_name(prop);
+
+	if (os != NULL)
+		error = zap_lookup(os, MASTER_NODE_OBJ, pname, 8, 1, value);
+
+	if (error == ENOENT) {
+		/* No value set, use the default value */
+		switch (prop) {
+		case ZFS_PROP_VERSION:
+			*value = ZPL_VERSION;
+			break;
+		case ZFS_PROP_NORMALIZE:
+		case ZFS_PROP_UTF8ONLY:
+			*value = 0;
+			break;
+		case ZFS_PROP_CASE:
+			*value = ZFS_CASE_SENSITIVE;
+			break;
+		default:
+			return (error);
+		}
+		error = 0;
+	}
+	return (error);
+}
+
+static vfsdef_t vfw = {
+	VFSDEF_VERSION,
+	MNTTYPE_ZFS,
+	zfs_vfsinit,
+	VSW_HASPROTO|VSW_CANRWRO|VSW_CANREMOUNT|VSW_VOLATILEDEV|VSW_STATS|
+	    VSW_XID|VSW_ZMOUNT,
+	&zfs_mntopts
+};
+
+struct modlfs zfs_modlfs = {
+	&mod_fsops, "ZFS filesystem version " SPA_VERSION_STRING, &vfw
+};
diff --git a/uts/common/fs/zfs/zfs_vnops.c b/uts/common/fs/zfs/zfs_vnops.c
new file mode 100644
index 000000000000..a0720079cf46
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_vnops.c
@@ -0,0 +1,5243 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2007 Jeremy Teo */
+/* Portions Copyright 2010 Robert Milkowski */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/resource.h>
+#include <sys/vfs.h>
+#include <sys/vfs_opreg.h>
+#include <sys/vnode.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/kmem.h>
+#include <sys/taskq.h>
+#include <sys/uio.h>
+#include <sys/vmsystm.h>
+#include <sys/atomic.h>
+#include <sys/vm.h>
+#include <vm/seg_vn.h>
+#include <vm/pvn.h>
+#include <vm/as.h>
+#include <vm/kpm.h>
+#include <vm/seg_kpm.h>
+#include <sys/mman.h>
+#include <sys/pathname.h>
+#include <sys/cmn_err.h>
+#include <sys/errno.h>
+#include <sys/unistd.h>
+#include <sys/zfs_dir.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/fs/zfs.h>
+#include <sys/dmu.h>
+#include <sys/dmu_objset.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/dbuf.h>
+#include <sys/zap.h>
+#include <sys/sa.h>
+#include <sys/dirent.h>
+#include <sys/policy.h>
+#include <sys/sunddi.h>
+#include <sys/filio.h>
+#include <sys/sid.h>
+#include "fs/fs_subr.h"
+#include <sys/zfs_ctldir.h>
+#include <sys/zfs_fuid.h>
+#include <sys/zfs_sa.h>
+#include <sys/dnlc.h>
+#include <sys/zfs_rlock.h>
+#include <sys/extdirent.h>
+#include <sys/kidmap.h>
+#include <sys/cred.h>
+#include <sys/attr.h>
+
+/*
+ * Programming rules.
+ *
+ * Each vnode op performs some logical unit of work.  To do this, the ZPL must
+ * properly lock its in-core state, create a DMU transaction, do the work,
+ * record this work in the intent log (ZIL), commit the DMU transaction,
+ * and wait for the intent log to commit if it is a synchronous operation.
+ * Moreover, the vnode ops must work in both normal and log replay context.
+ * The ordering of events is important to avoid deadlocks and references
+ * to freed memory.  The example below illustrates the following Big Rules:
+ *
+ *  (1) A check must be made in each zfs thread for a mounted file system.
+ *	This is done avoiding races using ZFS_ENTER(zfsvfs).
+ *      A ZFS_EXIT(zfsvfs) is needed before all returns.  Any znodes
+ *      must be checked with ZFS_VERIFY_ZP(zp).  Both of these macros
+ *      can return EIO from the calling function.
+ *
+ *  (2)	VN_RELE() should always be the last thing except for zil_commit()
+ *	(if necessary) and ZFS_EXIT(). This is for 3 reasons:
+ *	First, if it's the last reference, the vnode/znode
+ *	can be freed, so the zp may point to freed memory.  Second, the last
+ *	reference will call zfs_zinactive(), which may induce a lot of work --
+ *	pushing cached pages (which acquires range locks) and syncing out
+ *	cached atime changes.  Third, zfs_zinactive() may require a new tx,
+ *	which could deadlock the system if you were already holding one.
+ *	If you must call VN_RELE() within a tx then use VN_RELE_ASYNC().
+ *
+ *  (3)	All range locks must be grabbed before calling dmu_tx_assign(),
+ *	as they can span dmu_tx_assign() calls.
+ *
+ *  (4)	Always pass TXG_NOWAIT as the second argument to dmu_tx_assign().
+ *	This is critical because we don't want to block while holding locks.
+ *	Note, in particular, that if a lock is sometimes acquired before
+ *	the tx assigns, and sometimes after (e.g. z_lock), then failing to
+ *	use a non-blocking assign can deadlock the system.  The scenario:
+ *
+ *	Thread A has grabbed a lock before calling dmu_tx_assign().
+ *	Thread B is in an already-assigned tx, and blocks for this lock.
+ *	Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open()
+ *	forever, because the previous txg can't quiesce until B's tx commits.
+ *
+ *	If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT,
+ *	then drop all locks, call dmu_tx_wait(), and try again.
+ *
+ *  (5)	If the operation succeeded, generate the intent log entry for it
+ *	before dropping locks.  This ensures that the ordering of events
+ *	in the intent log matches the order in which they actually occurred.
+ *      During ZIL replay the zfs_log_* functions will update the sequence
+ *	number to indicate the zil transaction has replayed.
+ *
+ *  (6)	At the end of each vnode op, the DMU tx must always commit,
+ *	regardless of whether there were any errors.
+ *
+ *  (7)	After dropping all locks, invoke zil_commit(zilog, foid)
+ *	to ensure that synchronous semantics are provided when necessary.
+ *
+ * In general, this is how things should be ordered in each vnode op:
+ *
+ *	ZFS_ENTER(zfsvfs);		// exit if unmounted
+ * top:
+ *	zfs_dirent_lock(&dl, ...)	// lock directory entry (may VN_HOLD())
+ *	rw_enter(...);			// grab any other locks you need
+ *	tx = dmu_tx_create(...);	// get DMU tx
+ *	dmu_tx_hold_*();		// hold each object you might modify
+ *	error = dmu_tx_assign(tx, TXG_NOWAIT);	// try to assign
+ *	if (error) {
+ *		rw_exit(...);		// drop locks
+ *		zfs_dirent_unlock(dl);	// unlock directory entry
+ *		VN_RELE(...);		// release held vnodes
+ *		if (error == ERESTART) {
+ *			dmu_tx_wait(tx);
+ *			dmu_tx_abort(tx);
+ *			goto top;
+ *		}
+ *		dmu_tx_abort(tx);	// abort DMU tx
+ *		ZFS_EXIT(zfsvfs);	// finished in zfs
+ *		return (error);		// really out of space
+ *	}
+ *	error = do_real_work();		// do whatever this VOP does
+ *	if (error == 0)
+ *		zfs_log_*(...);		// on success, make ZIL entry
+ *	dmu_tx_commit(tx);		// commit DMU tx -- error or not
+ *	rw_exit(...);			// drop locks
+ *	zfs_dirent_unlock(dl);		// unlock directory entry
+ *	VN_RELE(...);			// release held vnodes
+ *	zil_commit(zilog, foid);	// synchronous when necessary
+ *	ZFS_EXIT(zfsvfs);		// finished in zfs
+ *	return (error);			// done, report error
+ */
+
+/* ARGSUSED */
+static int
+zfs_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct)
+{
+	znode_t	*zp = VTOZ(*vpp);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	if ((flag & FWRITE) && (zp->z_pflags & ZFS_APPENDONLY) &&
+	    ((flag & FAPPEND) == 0)) {
+		ZFS_EXIT(zfsvfs);
+		return (EPERM);
+	}
+
+	if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan &&
+	    ZTOV(zp)->v_type == VREG &&
+	    !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) {
+		if (fs_vscan(*vpp, cr, 0) != 0) {
+			ZFS_EXIT(zfsvfs);
+			return (EACCES);
+		}
+	}
+
+	/* Keep a count of the synchronous opens in the znode */
+	if (flag & (FSYNC | FDSYNC))
+		atomic_inc_32(&zp->z_sync_cnt);
+
+	ZFS_EXIT(zfsvfs);
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr,
+    caller_context_t *ct)
+{
+	znode_t	*zp = VTOZ(vp);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+
+	/*
+	 * Clean up any locks held by this process on the vp.
+	 */
+	cleanlocks(vp, ddi_get_pid(), 0);
+	cleanshares(vp, ddi_get_pid());
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	/* Decrement the synchronous opens in the znode */
+	if ((flag & (FSYNC | FDSYNC)) && (count == 1))
+		atomic_dec_32(&zp->z_sync_cnt);
+
+	if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan &&
+	    ZTOV(zp)->v_type == VREG &&
+	    !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0)
+		VERIFY(fs_vscan(vp, cr, 1) == 0);
+
+	ZFS_EXIT(zfsvfs);
+	return (0);
+}
+
+/*
+ * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and
+ * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter.
+ */
+static int
+zfs_holey(vnode_t *vp, int cmd, offset_t *off)
+{
+	znode_t	*zp = VTOZ(vp);
+	uint64_t noff = (uint64_t)*off; /* new offset */
+	uint64_t file_sz;
+	int error;
+	boolean_t hole;
+
+	file_sz = zp->z_size;
+	if (noff >= file_sz)  {
+		return (ENXIO);
+	}
+
+	if (cmd == _FIO_SEEK_HOLE)
+		hole = B_TRUE;
+	else
+		hole = B_FALSE;
+
+	error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff);
+
+	/* end of file? */
+	if ((error == ESRCH) || (noff > file_sz)) {
+		/*
+		 * Handle the virtual hole at the end of file.
+		 */
+		if (hole) {
+			*off = file_sz;
+			return (0);
+		}
+		return (ENXIO);
+	}
+
+	if (noff < *off)
+		return (error);
+	*off = noff;
+	return (error);
+}
+
+/* ARGSUSED */
+static int
+zfs_ioctl(vnode_t *vp, int com, intptr_t data, int flag, cred_t *cred,
+    int *rvalp, caller_context_t *ct)
+{
+	offset_t off;
+	int error;
+	zfsvfs_t *zfsvfs;
+	znode_t *zp;
+
+	switch (com) {
+	case _FIOFFS:
+		return (zfs_sync(vp->v_vfsp, 0, cred));
+
+		/*
+		 * The following two ioctls are used by bfu.  Faking out,
+		 * necessary to avoid bfu errors.
+		 */
+	case _FIOGDIO:
+	case _FIOSDIO:
+		return (0);
+
+	case _FIO_SEEK_DATA:
+	case _FIO_SEEK_HOLE:
+		if (ddi_copyin((void *)data, &off, sizeof (off), flag))
+			return (EFAULT);
+
+		zp = VTOZ(vp);
+		zfsvfs = zp->z_zfsvfs;
+		ZFS_ENTER(zfsvfs);
+		ZFS_VERIFY_ZP(zp);
+
+		/* offset parameter is in/out */
+		error = zfs_holey(vp, com, &off);
+		ZFS_EXIT(zfsvfs);
+		if (error)
+			return (error);
+		if (ddi_copyout(&off, (void *)data, sizeof (off), flag))
+			return (EFAULT);
+		return (0);
+	}
+	return (ENOTTY);
+}
+
+/*
+ * Utility functions to map and unmap a single physical page.  These
+ * are used to manage the mappable copies of ZFS file data, and therefore
+ * do not update ref/mod bits.
+ */
+caddr_t
+zfs_map_page(page_t *pp, enum seg_rw rw)
+{
+	if (kpm_enable)
+		return (hat_kpm_mapin(pp, 0));
+	ASSERT(rw == S_READ || rw == S_WRITE);
+	return (ppmapin(pp, PROT_READ | ((rw == S_WRITE) ? PROT_WRITE : 0),
+	    (caddr_t)-1));
+}
+
+void
+zfs_unmap_page(page_t *pp, caddr_t addr)
+{
+	if (kpm_enable) {
+		hat_kpm_mapout(pp, 0, addr);
+	} else {
+		ppmapout(addr);
+	}
+}
+
+/*
+ * When a file is memory mapped, we must keep the IO data synchronized
+ * between the DMU cache and the memory mapped pages.  What this means:
+ *
+ * On Write:	If we find a memory mapped page, we write to *both*
+ *		the page and the dmu buffer.
+ */
+static void
+update_pages(vnode_t *vp, int64_t start, int len, objset_t *os, uint64_t oid)
+{
+	int64_t	off;
+
+	off = start & PAGEOFFSET;
+	for (start &= PAGEMASK; len > 0; start += PAGESIZE) {
+		page_t *pp;
+		uint64_t nbytes = MIN(PAGESIZE - off, len);
+
+		if (pp = page_lookup(vp, start, SE_SHARED)) {
+			caddr_t va;
+
+			va = zfs_map_page(pp, S_WRITE);
+			(void) dmu_read(os, oid, start+off, nbytes, va+off,
+			    DMU_READ_PREFETCH);
+			zfs_unmap_page(pp, va);
+			page_unlock(pp);
+		}
+		len -= nbytes;
+		off = 0;
+	}
+}
+
+/*
+ * When a file is memory mapped, we must keep the IO data synchronized
+ * between the DMU cache and the memory mapped pages.  What this means:
+ *
+ * On Read:	We "read" preferentially from memory mapped pages,
+ *		else we default from the dmu buffer.
+ *
+ * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when
+ *	the file is memory mapped.
+ */
+static int
+mappedread(vnode_t *vp, int nbytes, uio_t *uio)
+{
+	znode_t *zp = VTOZ(vp);
+	objset_t *os = zp->z_zfsvfs->z_os;
+	int64_t	start, off;
+	int len = nbytes;
+	int error = 0;
+
+	start = uio->uio_loffset;
+	off = start & PAGEOFFSET;
+	for (start &= PAGEMASK; len > 0; start += PAGESIZE) {
+		page_t *pp;
+		uint64_t bytes = MIN(PAGESIZE - off, len);
+
+		if (pp = page_lookup(vp, start, SE_SHARED)) {
+			caddr_t va;
+
+			va = zfs_map_page(pp, S_READ);
+			error = uiomove(va + off, bytes, UIO_READ, uio);
+			zfs_unmap_page(pp, va);
+			page_unlock(pp);
+		} else {
+			error = dmu_read_uio(os, zp->z_id, uio, bytes);
+		}
+		len -= bytes;
+		off = 0;
+		if (error)
+			break;
+	}
+	return (error);
+}
+
+offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */
+
+/*
+ * Read bytes from specified file into supplied buffer.
+ *
+ *	IN:	vp	- vnode of file to be read from.
+ *		uio	- structure supplying read location, range info,
+ *			  and return buffer.
+ *		ioflag	- SYNC flags; used to provide FRSYNC semantics.
+ *		cr	- credentials of caller.
+ *		ct	- caller context
+ *
+ *	OUT:	uio	- updated offset and range, buffer filled.
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Side Effects:
+ *	vp - atime updated if byte count > 0
+ */
+/* ARGSUSED */
+static int
+zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct)
+{
+	znode_t		*zp = VTOZ(vp);
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	objset_t	*os;
+	ssize_t		n, nbytes;
+	int		error;
+	rl_t		*rl;
+	xuio_t		*xuio = NULL;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+	os = zfsvfs->z_os;
+
+	if (zp->z_pflags & ZFS_AV_QUARANTINED) {
+		ZFS_EXIT(zfsvfs);
+		return (EACCES);
+	}
+
+	/*
+	 * Validate file offset
+	 */
+	if (uio->uio_loffset < (offset_t)0) {
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+	/*
+	 * Fasttrack empty reads
+	 */
+	if (uio->uio_resid == 0) {
+		ZFS_EXIT(zfsvfs);
+		return (0);
+	}
+
+	/*
+	 * Check for mandatory locks
+	 */
+	if (MANDMODE(zp->z_mode)) {
+		if (error = chklock(vp, FREAD,
+		    uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) {
+			ZFS_EXIT(zfsvfs);
+			return (error);
+		}
+	}
+
+	/*
+	 * If we're in FRSYNC mode, sync out this znode before reading it.
+	 */
+	if (ioflag & FRSYNC || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+		zil_commit(zfsvfs->z_log, zp->z_id);
+
+	/*
+	 * Lock the range against changes.
+	 */
+	rl = zfs_range_lock(zp, uio->uio_loffset, uio->uio_resid, RL_READER);
+
+	/*
+	 * If we are reading past end-of-file we can skip
+	 * to the end; but we might still need to set atime.
+	 */
+	if (uio->uio_loffset >= zp->z_size) {
+		error = 0;
+		goto out;
+	}
+
+	ASSERT(uio->uio_loffset < zp->z_size);
+	n = MIN(uio->uio_resid, zp->z_size - uio->uio_loffset);
+
+	if ((uio->uio_extflg == UIO_XUIO) &&
+	    (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY)) {
+		int nblk;
+		int blksz = zp->z_blksz;
+		uint64_t offset = uio->uio_loffset;
+
+		xuio = (xuio_t *)uio;
+		if ((ISP2(blksz))) {
+			nblk = (P2ROUNDUP(offset + n, blksz) - P2ALIGN(offset,
+			    blksz)) / blksz;
+		} else {
+			ASSERT(offset + n <= blksz);
+			nblk = 1;
+		}
+		(void) dmu_xuio_init(xuio, nblk);
+
+		if (vn_has_cached_data(vp)) {
+			/*
+			 * For simplicity, we always allocate a full buffer
+			 * even if we only expect to read a portion of a block.
+			 */
+			while (--nblk >= 0) {
+				(void) dmu_xuio_add(xuio,
+				    dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
+				    blksz), 0, blksz);
+			}
+		}
+	}
+
+	while (n > 0) {
+		nbytes = MIN(n, zfs_read_chunk_size -
+		    P2PHASE(uio->uio_loffset, zfs_read_chunk_size));
+
+		if (vn_has_cached_data(vp))
+			error = mappedread(vp, nbytes, uio);
+		else
+			error = dmu_read_uio(os, zp->z_id, uio, nbytes);
+		if (error) {
+			/* convert checksum errors into IO errors */
+			if (error == ECKSUM)
+				error = EIO;
+			break;
+		}
+
+		n -= nbytes;
+	}
+out:
+	zfs_range_unlock(rl);
+
+	ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * Write the bytes to a file.
+ *
+ *	IN:	vp	- vnode of file to be written to.
+ *		uio	- structure supplying write location, range info,
+ *			  and data buffer.
+ *		ioflag	- FAPPEND flag set if in append mode.
+ *		cr	- credentials of caller.
+ *		ct	- caller context (NFS/CIFS fem monitor only)
+ *
+ *	OUT:	uio	- updated offset and range.
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	vp - ctime|mtime updated if byte count > 0
+ */
+
+/* ARGSUSED */
+static int
+zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct)
+{
+	znode_t		*zp = VTOZ(vp);
+	rlim64_t	limit = uio->uio_llimit;
+	ssize_t		start_resid = uio->uio_resid;
+	ssize_t		tx_bytes;
+	uint64_t	end_size;
+	dmu_tx_t	*tx;
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	zilog_t		*zilog;
+	offset_t	woff;
+	ssize_t		n, nbytes;
+	rl_t		*rl;
+	int		max_blksz = zfsvfs->z_max_blksz;
+	int		error;
+	arc_buf_t	*abuf;
+	iovec_t		*aiov;
+	xuio_t		*xuio = NULL;
+	int		i_iov = 0;
+	int		iovcnt = uio->uio_iovcnt;
+	iovec_t		*iovp = uio->uio_iov;
+	int		write_eof;
+	int		count = 0;
+	sa_bulk_attr_t	bulk[4];
+	uint64_t	mtime[2], ctime[2];
+
+	/*
+	 * Fasttrack empty write
+	 */
+	n = start_resid;
+	if (n == 0)
+		return (0);
+
+	if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T)
+		limit = MAXOFFSET_T;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
+	    &zp->z_size, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+	    &zp->z_pflags, 8);
+
+	/*
+	 * If immutable or not appending then return EPERM
+	 */
+	if ((zp->z_pflags & (ZFS_IMMUTABLE | ZFS_READONLY)) ||
+	    ((zp->z_pflags & ZFS_APPENDONLY) && !(ioflag & FAPPEND) &&
+	    (uio->uio_loffset < zp->z_size))) {
+		ZFS_EXIT(zfsvfs);
+		return (EPERM);
+	}
+
+	zilog = zfsvfs->z_log;
+
+	/*
+	 * Validate file offset
+	 */
+	woff = ioflag & FAPPEND ? zp->z_size : uio->uio_loffset;
+	if (woff < 0) {
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+	/*
+	 * Check for mandatory locks before calling zfs_range_lock()
+	 * in order to prevent a deadlock with locks set via fcntl().
+	 */
+	if (MANDMODE((mode_t)zp->z_mode) &&
+	    (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	/*
+	 * Pre-fault the pages to ensure slow (eg NFS) pages
+	 * don't hold up txg.
+	 * Skip this if uio contains loaned arc_buf.
+	 */
+	if ((uio->uio_extflg == UIO_XUIO) &&
+	    (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY))
+		xuio = (xuio_t *)uio;
+	else
+		uio_prefaultpages(MIN(n, max_blksz), uio);
+
+	/*
+	 * If in append mode, set the io offset pointer to eof.
+	 */
+	if (ioflag & FAPPEND) {
+		/*
+		 * Obtain an appending range lock to guarantee file append
+		 * semantics.  We reset the write offset once we have the lock.
+		 */
+		rl = zfs_range_lock(zp, 0, n, RL_APPEND);
+		woff = rl->r_off;
+		if (rl->r_len == UINT64_MAX) {
+			/*
+			 * We overlocked the file because this write will cause
+			 * the file block size to increase.
+			 * Note that zp_size cannot change with this lock held.
+			 */
+			woff = zp->z_size;
+		}
+		uio->uio_loffset = woff;
+	} else {
+		/*
+		 * Note that if the file block size will change as a result of
+		 * this write, then this range lock will lock the entire file
+		 * so that we can re-write the block safely.
+		 */
+		rl = zfs_range_lock(zp, woff, n, RL_WRITER);
+	}
+
+	if (woff >= limit) {
+		zfs_range_unlock(rl);
+		ZFS_EXIT(zfsvfs);
+		return (EFBIG);
+	}
+
+	if ((woff + n) > limit || woff > (limit - n))
+		n = limit - woff;
+
+	/* Will this write extend the file length? */
+	write_eof = (woff + n > zp->z_size);
+
+	end_size = MAX(zp->z_size, woff + n);
+
+	/*
+	 * Write the file in reasonable size chunks.  Each chunk is written
+	 * in a separate transaction; this keeps the intent log records small
+	 * and allows us to do more fine-grained space accounting.
+	 */
+	while (n > 0) {
+		abuf = NULL;
+		woff = uio->uio_loffset;
+again:
+		if (zfs_owner_overquota(zfsvfs, zp, B_FALSE) ||
+		    zfs_owner_overquota(zfsvfs, zp, B_TRUE)) {
+			if (abuf != NULL)
+				dmu_return_arcbuf(abuf);
+			error = EDQUOT;
+			break;
+		}
+
+		if (xuio && abuf == NULL) {
+			ASSERT(i_iov < iovcnt);
+			aiov = &iovp[i_iov];
+			abuf = dmu_xuio_arcbuf(xuio, i_iov);
+			dmu_xuio_clear(xuio, i_iov);
+			DTRACE_PROBE3(zfs_cp_write, int, i_iov,
+			    iovec_t *, aiov, arc_buf_t *, abuf);
+			ASSERT((aiov->iov_base == abuf->b_data) ||
+			    ((char *)aiov->iov_base - (char *)abuf->b_data +
+			    aiov->iov_len == arc_buf_size(abuf)));
+			i_iov++;
+		} else if (abuf == NULL && n >= max_blksz &&
+		    woff >= zp->z_size &&
+		    P2PHASE(woff, max_blksz) == 0 &&
+		    zp->z_blksz == max_blksz) {
+			/*
+			 * This write covers a full block.  "Borrow" a buffer
+			 * from the dmu so that we can fill it before we enter
+			 * a transaction.  This avoids the possibility of
+			 * holding up the transaction if the data copy hangs
+			 * up on a pagefault (e.g., from an NFS server mapping).
+			 */
+			size_t cbytes;
+
+			abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
+			    max_blksz);
+			ASSERT(abuf != NULL);
+			ASSERT(arc_buf_size(abuf) == max_blksz);
+			if (error = uiocopy(abuf->b_data, max_blksz,
+			    UIO_WRITE, uio, &cbytes)) {
+				dmu_return_arcbuf(abuf);
+				break;
+			}
+			ASSERT(cbytes == max_blksz);
+		}
+
+		/*
+		 * Start a transaction.
+		 */
+		tx = dmu_tx_create(zfsvfs->z_os);
+		dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+		dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz));
+		zfs_sa_upgrade_txholds(tx, zp);
+		error = dmu_tx_assign(tx, TXG_NOWAIT);
+		if (error) {
+			if (error == ERESTART) {
+				dmu_tx_wait(tx);
+				dmu_tx_abort(tx);
+				goto again;
+			}
+			dmu_tx_abort(tx);
+			if (abuf != NULL)
+				dmu_return_arcbuf(abuf);
+			break;
+		}
+
+		/*
+		 * If zfs_range_lock() over-locked we grow the blocksize
+		 * and then reduce the lock range.  This will only happen
+		 * on the first iteration since zfs_range_reduce() will
+		 * shrink down r_len to the appropriate size.
+		 */
+		if (rl->r_len == UINT64_MAX) {
+			uint64_t new_blksz;
+
+			if (zp->z_blksz > max_blksz) {
+				ASSERT(!ISP2(zp->z_blksz));
+				new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE);
+			} else {
+				new_blksz = MIN(end_size, max_blksz);
+			}
+			zfs_grow_blocksize(zp, new_blksz, tx);
+			zfs_range_reduce(rl, woff, n);
+		}
+
+		/*
+		 * XXX - should we really limit each write to z_max_blksz?
+		 * Perhaps we should use SPA_MAXBLOCKSIZE chunks?
+		 */
+		nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz));
+
+		if (abuf == NULL) {
+			tx_bytes = uio->uio_resid;
+			error = dmu_write_uio_dbuf(sa_get_db(zp->z_sa_hdl),
+			    uio, nbytes, tx);
+			tx_bytes -= uio->uio_resid;
+		} else {
+			tx_bytes = nbytes;
+			ASSERT(xuio == NULL || tx_bytes == aiov->iov_len);
+			/*
+			 * If this is not a full block write, but we are
+			 * extending the file past EOF and this data starts
+			 * block-aligned, use assign_arcbuf().  Otherwise,
+			 * write via dmu_write().
+			 */
+			if (tx_bytes < max_blksz && (!write_eof ||
+			    aiov->iov_base != abuf->b_data)) {
+				ASSERT(xuio);
+				dmu_write(zfsvfs->z_os, zp->z_id, woff,
+				    aiov->iov_len, aiov->iov_base, tx);
+				dmu_return_arcbuf(abuf);
+				xuio_stat_wbuf_copied();
+			} else {
+				ASSERT(xuio || tx_bytes == max_blksz);
+				dmu_assign_arcbuf(sa_get_db(zp->z_sa_hdl),
+				    woff, abuf, tx);
+			}
+			ASSERT(tx_bytes <= uio->uio_resid);
+			uioskip(uio, tx_bytes);
+		}
+		if (tx_bytes && vn_has_cached_data(vp)) {
+			update_pages(vp, woff,
+			    tx_bytes, zfsvfs->z_os, zp->z_id);
+		}
+
+		/*
+		 * If we made no progress, we're done.  If we made even
+		 * partial progress, update the znode and ZIL accordingly.
+		 */
+		if (tx_bytes == 0) {
+			(void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs),
+			    (void *)&zp->z_size, sizeof (uint64_t), tx);
+			dmu_tx_commit(tx);
+			ASSERT(error != 0);
+			break;
+		}
+
+		/*
+		 * Clear Set-UID/Set-GID bits on successful write if not
+		 * privileged and at least one of the excute bits is set.
+		 *
+		 * It would be nice to to this after all writes have
+		 * been done, but that would still expose the ISUID/ISGID
+		 * to another app after the partial write is committed.
+		 *
+		 * Note: we don't call zfs_fuid_map_id() here because
+		 * user 0 is not an ephemeral uid.
+		 */
+		mutex_enter(&zp->z_acl_lock);
+		if ((zp->z_mode & (S_IXUSR | (S_IXUSR >> 3) |
+		    (S_IXUSR >> 6))) != 0 &&
+		    (zp->z_mode & (S_ISUID | S_ISGID)) != 0 &&
+		    secpolicy_vnode_setid_retain(cr,
+		    (zp->z_mode & S_ISUID) != 0 && zp->z_uid == 0) != 0) {
+			uint64_t newmode;
+			zp->z_mode &= ~(S_ISUID | S_ISGID);
+			newmode = zp->z_mode;
+			(void) sa_update(zp->z_sa_hdl, SA_ZPL_MODE(zfsvfs),
+			    (void *)&newmode, sizeof (uint64_t), tx);
+		}
+		mutex_exit(&zp->z_acl_lock);
+
+		zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime,
+		    B_TRUE);
+
+		/*
+		 * Update the file size (zp_size) if it has changed;
+		 * account for possible concurrent updates.
+		 */
+		while ((end_size = zp->z_size) < uio->uio_loffset) {
+			(void) atomic_cas_64(&zp->z_size, end_size,
+			    uio->uio_loffset);
+			ASSERT(error == 0);
+		}
+		/*
+		 * If we are replaying and eof is non zero then force
+		 * the file size to the specified eof. Note, there's no
+		 * concurrency during replay.
+		 */
+		if (zfsvfs->z_replay && zfsvfs->z_replay_eof != 0)
+			zp->z_size = zfsvfs->z_replay_eof;
+
+		error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
+
+		zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag);
+		dmu_tx_commit(tx);
+
+		if (error != 0)
+			break;
+		ASSERT(tx_bytes == nbytes);
+		n -= nbytes;
+
+		if (!xuio && n > 0)
+			uio_prefaultpages(MIN(n, max_blksz), uio);
+	}
+
+	zfs_range_unlock(rl);
+
+	/*
+	 * If we're in replay mode, or we made no progress, return error.
+	 * Otherwise, it's at least a partial write, so it's successful.
+	 */
+	if (zfsvfs->z_replay || uio->uio_resid == start_resid) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	if (ioflag & (FSYNC | FDSYNC) ||
+	    zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+		zil_commit(zilog, zp->z_id);
+
+	ZFS_EXIT(zfsvfs);
+	return (0);
+}
+
+void
+zfs_get_done(zgd_t *zgd, int error)
+{
+	znode_t *zp = zgd->zgd_private;
+	objset_t *os = zp->z_zfsvfs->z_os;
+
+	if (zgd->zgd_db)
+		dmu_buf_rele(zgd->zgd_db, zgd);
+
+	zfs_range_unlock(zgd->zgd_rl);
+
+	/*
+	 * Release the vnode asynchronously as we currently have the
+	 * txg stopped from syncing.
+	 */
+	VN_RELE_ASYNC(ZTOV(zp), dsl_pool_vnrele_taskq(dmu_objset_pool(os)));
+
+	if (error == 0 && zgd->zgd_bp)
+		zil_add_block(zgd->zgd_zilog, zgd->zgd_bp);
+
+	kmem_free(zgd, sizeof (zgd_t));
+}
+
+#ifdef DEBUG
+static int zil_fault_io = 0;
+#endif
+
+/*
+ * Get data to generate a TX_WRITE intent log record.
+ */
+int
+zfs_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio)
+{
+	zfsvfs_t *zfsvfs = arg;
+	objset_t *os = zfsvfs->z_os;
+	znode_t *zp;
+	uint64_t object = lr->lr_foid;
+	uint64_t offset = lr->lr_offset;
+	uint64_t size = lr->lr_length;
+	blkptr_t *bp = &lr->lr_blkptr;
+	dmu_buf_t *db;
+	zgd_t *zgd;
+	int error = 0;
+
+	ASSERT(zio != NULL);
+	ASSERT(size != 0);
+
+	/*
+	 * Nothing to do if the file has been removed
+	 */
+	if (zfs_zget(zfsvfs, object, &zp) != 0)
+		return (ENOENT);
+	if (zp->z_unlinked) {
+		/*
+		 * Release the vnode asynchronously as we currently have the
+		 * txg stopped from syncing.
+		 */
+		VN_RELE_ASYNC(ZTOV(zp),
+		    dsl_pool_vnrele_taskq(dmu_objset_pool(os)));
+		return (ENOENT);
+	}
+
+	zgd = (zgd_t *)kmem_zalloc(sizeof (zgd_t), KM_SLEEP);
+	zgd->zgd_zilog = zfsvfs->z_log;
+	zgd->zgd_private = zp;
+
+	/*
+	 * Write records come in two flavors: immediate and indirect.
+	 * For small writes it's cheaper to store the data with the
+	 * log record (immediate); for large writes it's cheaper to
+	 * sync the data and get a pointer to it (indirect) so that
+	 * we don't have to write the data twice.
+	 */
+	if (buf != NULL) { /* immediate write */
+		zgd->zgd_rl = zfs_range_lock(zp, offset, size, RL_READER);
+		/* test for truncation needs to be done while range locked */
+		if (offset >= zp->z_size) {
+			error = ENOENT;
+		} else {
+			error = dmu_read(os, object, offset, size, buf,
+			    DMU_READ_NO_PREFETCH);
+		}
+		ASSERT(error == 0 || error == ENOENT);
+	} else { /* indirect write */
+		/*
+		 * Have to lock the whole block to ensure when it's
+		 * written out and it's checksum is being calculated
+		 * that no one can change the data. We need to re-check
+		 * blocksize after we get the lock in case it's changed!
+		 */
+		for (;;) {
+			uint64_t blkoff;
+			size = zp->z_blksz;
+			blkoff = ISP2(size) ? P2PHASE(offset, size) : offset;
+			offset -= blkoff;
+			zgd->zgd_rl = zfs_range_lock(zp, offset, size,
+			    RL_READER);
+			if (zp->z_blksz == size)
+				break;
+			offset += blkoff;
+			zfs_range_unlock(zgd->zgd_rl);
+		}
+		/* test for truncation needs to be done while range locked */
+		if (lr->lr_offset >= zp->z_size)
+			error = ENOENT;
+#ifdef DEBUG
+		if (zil_fault_io) {
+			error = EIO;
+			zil_fault_io = 0;
+		}
+#endif
+		if (error == 0)
+			error = dmu_buf_hold(os, object, offset, zgd, &db,
+			    DMU_READ_NO_PREFETCH);
+
+		if (error == 0) {
+			zgd->zgd_db = db;
+			zgd->zgd_bp = bp;
+
+			ASSERT(db->db_offset == offset);
+			ASSERT(db->db_size == size);
+
+			error = dmu_sync(zio, lr->lr_common.lrc_txg,
+			    zfs_get_done, zgd);
+			ASSERT(error || lr->lr_length <= zp->z_blksz);
+
+			/*
+			 * On success, we need to wait for the write I/O
+			 * initiated by dmu_sync() to complete before we can
+			 * release this dbuf.  We will finish everything up
+			 * in the zfs_get_done() callback.
+			 */
+			if (error == 0)
+				return (0);
+
+			if (error == EALREADY) {
+				lr->lr_common.lrc_txtype = TX_WRITE2;
+				error = 0;
+			}
+		}
+	}
+
+	zfs_get_done(zgd, error);
+
+	return (error);
+}
+
+/*ARGSUSED*/
+static int
+zfs_access(vnode_t *vp, int mode, int flag, cred_t *cr,
+    caller_context_t *ct)
+{
+	znode_t *zp = VTOZ(vp);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	int error;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	if (flag & V_ACE_MASK)
+		error = zfs_zaccess(zp, mode, flag, B_FALSE, cr);
+	else
+		error = zfs_zaccess_rwx(zp, mode, flag, cr);
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * If vnode is for a device return a specfs vnode instead.
+ */
+static int
+specvp_check(vnode_t **vpp, cred_t *cr)
+{
+	int error = 0;
+
+	if (IS_DEVVP(*vpp)) {
+		struct vnode *svp;
+
+		svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr);
+		VN_RELE(*vpp);
+		if (svp == NULL)
+			error = ENOSYS;
+		*vpp = svp;
+	}
+	return (error);
+}
+
+
+/*
+ * Lookup an entry in a directory, or an extended attribute directory.
+ * If it exists, return a held vnode reference for it.
+ *
+ *	IN:	dvp	- vnode of directory to search.
+ *		nm	- name of entry to lookup.
+ *		pnp	- full pathname to lookup [UNUSED].
+ *		flags	- LOOKUP_XATTR set if looking for an attribute.
+ *		rdir	- root directory vnode [UNUSED].
+ *		cr	- credentials of caller.
+ *		ct	- caller context
+ *		direntflags - directory lookup flags
+ *		realpnp - returned pathname.
+ *
+ *	OUT:	vpp	- vnode of located entry, NULL if not found.
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	NA
+ */
+/* ARGSUSED */
+static int
+zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp,
+    int flags, vnode_t *rdir, cred_t *cr,  caller_context_t *ct,
+    int *direntflags, pathname_t *realpnp)
+{
+	znode_t *zdp = VTOZ(dvp);
+	zfsvfs_t *zfsvfs = zdp->z_zfsvfs;
+	int	error = 0;
+
+	/* fast path */
+	if (!(flags & (LOOKUP_XATTR | FIGNORECASE))) {
+
+		if (dvp->v_type != VDIR) {
+			return (ENOTDIR);
+		} else if (zdp->z_sa_hdl == NULL) {
+			return (EIO);
+		}
+
+		if (nm[0] == 0 || (nm[0] == '.' && nm[1] == '\0')) {
+			error = zfs_fastaccesschk_execute(zdp, cr);
+			if (!error) {
+				*vpp = dvp;
+				VN_HOLD(*vpp);
+				return (0);
+			}
+			return (error);
+		} else {
+			vnode_t *tvp = dnlc_lookup(dvp, nm);
+
+			if (tvp) {
+				error = zfs_fastaccesschk_execute(zdp, cr);
+				if (error) {
+					VN_RELE(tvp);
+					return (error);
+				}
+				if (tvp == DNLC_NO_VNODE) {
+					VN_RELE(tvp);
+					return (ENOENT);
+				} else {
+					*vpp = tvp;
+					return (specvp_check(vpp, cr));
+				}
+			}
+		}
+	}
+
+	DTRACE_PROBE2(zfs__fastpath__lookup__miss, vnode_t *, dvp, char *, nm);
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zdp);
+
+	*vpp = NULL;
+
+	if (flags & LOOKUP_XATTR) {
+		/*
+		 * If the xattr property is off, refuse the lookup request.
+		 */
+		if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) {
+			ZFS_EXIT(zfsvfs);
+			return (EINVAL);
+		}
+
+		/*
+		 * We don't allow recursive attributes..
+		 * Maybe someday we will.
+		 */
+		if (zdp->z_pflags & ZFS_XATTR) {
+			ZFS_EXIT(zfsvfs);
+			return (EINVAL);
+		}
+
+		if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) {
+			ZFS_EXIT(zfsvfs);
+			return (error);
+		}
+
+		/*
+		 * Do we have permission to get into attribute directory?
+		 */
+
+		if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, 0,
+		    B_FALSE, cr)) {
+			VN_RELE(*vpp);
+			*vpp = NULL;
+		}
+
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	if (dvp->v_type != VDIR) {
+		ZFS_EXIT(zfsvfs);
+		return (ENOTDIR);
+	}
+
+	/*
+	 * Check accessibility of directory.
+	 */
+
+	if (error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr)) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm),
+	    NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+		ZFS_EXIT(zfsvfs);
+		return (EILSEQ);
+	}
+
+	error = zfs_dirlook(zdp, nm, vpp, flags, direntflags, realpnp);
+	if (error == 0)
+		error = specvp_check(vpp, cr);
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * Attempt to create a new entry in a directory.  If the entry
+ * already exists, truncate the file if permissible, else return
+ * an error.  Return the vp of the created or trunc'd file.
+ *
+ *	IN:	dvp	- vnode of directory to put new file entry in.
+ *		name	- name of new file entry.
+ *		vap	- attributes of new file.
+ *		excl	- flag indicating exclusive or non-exclusive mode.
+ *		mode	- mode to open file with.
+ *		cr	- credentials of caller.
+ *		flag	- large file flag [UNUSED].
+ *		ct	- caller context
+ *		vsecp 	- ACL to be set
+ *
+ *	OUT:	vpp	- vnode of created or trunc'd entry.
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	dvp - ctime|mtime updated if new entry created
+ *	 vp - ctime|mtime always, atime if new
+ */
+
+/* ARGSUSED */
+static int
+zfs_create(vnode_t *dvp, char *name, vattr_t *vap, vcexcl_t excl,
+    int mode, vnode_t **vpp, cred_t *cr, int flag, caller_context_t *ct,
+    vsecattr_t *vsecp)
+{
+	znode_t		*zp, *dzp = VTOZ(dvp);
+	zfsvfs_t	*zfsvfs = dzp->z_zfsvfs;
+	zilog_t		*zilog;
+	objset_t	*os;
+	zfs_dirlock_t	*dl;
+	dmu_tx_t	*tx;
+	int		error;
+	ksid_t		*ksid;
+	uid_t		uid;
+	gid_t		gid = crgetgid(cr);
+	zfs_acl_ids_t   acl_ids;
+	boolean_t	fuid_dirtied;
+	boolean_t	have_acl = B_FALSE;
+
+	/*
+	 * If we have an ephemeral id, ACL, or XVATTR then
+	 * make sure file system is at proper version
+	 */
+
+	ksid = crgetsid(cr, KSID_OWNER);
+	if (ksid)
+		uid = ksid_getid(ksid);
+	else
+		uid = crgetuid(cr);
+
+	if (zfsvfs->z_use_fuids == B_FALSE &&
+	    (vsecp || (vap->va_mask & AT_XVATTR) ||
+	    IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
+		return (EINVAL);
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(dzp);
+	os = zfsvfs->z_os;
+	zilog = zfsvfs->z_log;
+
+	if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
+	    NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+		ZFS_EXIT(zfsvfs);
+		return (EILSEQ);
+	}
+
+	if (vap->va_mask & AT_XVATTR) {
+		if ((error = secpolicy_xvattr((xvattr_t *)vap,
+		    crgetuid(cr), cr, vap->va_type)) != 0) {
+			ZFS_EXIT(zfsvfs);
+			return (error);
+		}
+	}
+top:
+	*vpp = NULL;
+
+	if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr))
+		vap->va_mode &= ~VSVTX;
+
+	if (*name == '\0') {
+		/*
+		 * Null component name refers to the directory itself.
+		 */
+		VN_HOLD(dvp);
+		zp = dzp;
+		dl = NULL;
+		error = 0;
+	} else {
+		/* possible VN_HOLD(zp) */
+		int zflg = 0;
+
+		if (flag & FIGNORECASE)
+			zflg |= ZCILOOK;
+
+		error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg,
+		    NULL, NULL);
+		if (error) {
+			if (have_acl)
+				zfs_acl_ids_free(&acl_ids);
+			if (strcmp(name, "..") == 0)
+				error = EISDIR;
+			ZFS_EXIT(zfsvfs);
+			return (error);
+		}
+	}
+
+	if (zp == NULL) {
+		uint64_t txtype;
+
+		/*
+		 * Create a new file object and update the directory
+		 * to reference it.
+		 */
+		if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) {
+			if (have_acl)
+				zfs_acl_ids_free(&acl_ids);
+			goto out;
+		}
+
+		/*
+		 * We only support the creation of regular files in
+		 * extended attribute directories.
+		 */
+
+		if ((dzp->z_pflags & ZFS_XATTR) &&
+		    (vap->va_type != VREG)) {
+			if (have_acl)
+				zfs_acl_ids_free(&acl_ids);
+			error = EINVAL;
+			goto out;
+		}
+
+		if (!have_acl && (error = zfs_acl_ids_create(dzp, 0, vap,
+		    cr, vsecp, &acl_ids)) != 0)
+			goto out;
+		have_acl = B_TRUE;
+
+		if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) {
+			zfs_acl_ids_free(&acl_ids);
+			error = EDQUOT;
+			goto out;
+		}
+
+		tx = dmu_tx_create(os);
+
+		dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
+		    ZFS_SA_BASE_ATTR_SIZE);
+
+		fuid_dirtied = zfsvfs->z_fuid_dirty;
+		if (fuid_dirtied)
+			zfs_fuid_txhold(zfsvfs, tx);
+		dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
+		dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE);
+		if (!zfsvfs->z_use_sa &&
+		    acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+			dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
+			    0, acl_ids.z_aclp->z_acl_bytes);
+		}
+		error = dmu_tx_assign(tx, TXG_NOWAIT);
+		if (error) {
+			zfs_dirent_unlock(dl);
+			if (error == ERESTART) {
+				dmu_tx_wait(tx);
+				dmu_tx_abort(tx);
+				goto top;
+			}
+			zfs_acl_ids_free(&acl_ids);
+			dmu_tx_abort(tx);
+			ZFS_EXIT(zfsvfs);
+			return (error);
+		}
+		zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
+
+		if (fuid_dirtied)
+			zfs_fuid_sync(zfsvfs, tx);
+
+		(void) zfs_link_create(dl, zp, tx, ZNEW);
+		txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap);
+		if (flag & FIGNORECASE)
+			txtype |= TX_CI;
+		zfs_log_create(zilog, tx, txtype, dzp, zp, name,
+		    vsecp, acl_ids.z_fuidp, vap);
+		zfs_acl_ids_free(&acl_ids);
+		dmu_tx_commit(tx);
+	} else {
+		int aflags = (flag & FAPPEND) ? V_APPEND : 0;
+
+		if (have_acl)
+			zfs_acl_ids_free(&acl_ids);
+		have_acl = B_FALSE;
+
+		/*
+		 * A directory entry already exists for this name.
+		 */
+		/*
+		 * Can't truncate an existing file if in exclusive mode.
+		 */
+		if (excl == EXCL) {
+			error = EEXIST;
+			goto out;
+		}
+		/*
+		 * Can't open a directory for writing.
+		 */
+		if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) {
+			error = EISDIR;
+			goto out;
+		}
+		/*
+		 * Verify requested access to file.
+		 */
+		if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) {
+			goto out;
+		}
+
+		mutex_enter(&dzp->z_lock);
+		dzp->z_seq++;
+		mutex_exit(&dzp->z_lock);
+
+		/*
+		 * Truncate regular files if requested.
+		 */
+		if ((ZTOV(zp)->v_type == VREG) &&
+		    (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) {
+			/* we can't hold any locks when calling zfs_freesp() */
+			zfs_dirent_unlock(dl);
+			dl = NULL;
+			error = zfs_freesp(zp, 0, 0, mode, TRUE);
+			if (error == 0) {
+				vnevent_create(ZTOV(zp), ct);
+			}
+		}
+	}
+out:
+
+	if (dl)
+		zfs_dirent_unlock(dl);
+
+	if (error) {
+		if (zp)
+			VN_RELE(ZTOV(zp));
+	} else {
+		*vpp = ZTOV(zp);
+		error = specvp_check(vpp, cr);
+	}
+
+	if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+		zil_commit(zilog, 0);
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * Remove an entry from a directory.
+ *
+ *	IN:	dvp	- vnode of directory to remove entry from.
+ *		name	- name of entry to remove.
+ *		cr	- credentials of caller.
+ *		ct	- caller context
+ *		flags	- case flags
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	dvp - ctime|mtime
+ *	 vp - ctime (if nlink > 0)
+ */
+
+uint64_t null_xattr = 0;
+
+/*ARGSUSED*/
+static int
+zfs_remove(vnode_t *dvp, char *name, cred_t *cr, caller_context_t *ct,
+    int flags)
+{
+	znode_t		*zp, *dzp = VTOZ(dvp);
+	znode_t		*xzp;
+	vnode_t		*vp;
+	zfsvfs_t	*zfsvfs = dzp->z_zfsvfs;
+	zilog_t		*zilog;
+	uint64_t	acl_obj, xattr_obj;
+	uint64_t 	xattr_obj_unlinked = 0;
+	uint64_t	obj = 0;
+	zfs_dirlock_t	*dl;
+	dmu_tx_t	*tx;
+	boolean_t	may_delete_now, delete_now = FALSE;
+	boolean_t	unlinked, toobig = FALSE;
+	uint64_t	txtype;
+	pathname_t	*realnmp = NULL;
+	pathname_t	realnm;
+	int		error;
+	int		zflg = ZEXISTS;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(dzp);
+	zilog = zfsvfs->z_log;
+
+	if (flags & FIGNORECASE) {
+		zflg |= ZCILOOK;
+		pn_alloc(&realnm);
+		realnmp = &realnm;
+	}
+
+top:
+	xattr_obj = 0;
+	xzp = NULL;
+	/*
+	 * Attempt to lock directory; fail if entry doesn't exist.
+	 */
+	if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg,
+	    NULL, realnmp)) {
+		if (realnmp)
+			pn_free(realnmp);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	vp = ZTOV(zp);
+
+	if (error = zfs_zaccess_delete(dzp, zp, cr)) {
+		goto out;
+	}
+
+	/*
+	 * Need to use rmdir for removing directories.
+	 */
+	if (vp->v_type == VDIR) {
+		error = EPERM;
+		goto out;
+	}
+
+	vnevent_remove(vp, dvp, name, ct);
+
+	if (realnmp)
+		dnlc_remove(dvp, realnmp->pn_buf);
+	else
+		dnlc_remove(dvp, name);
+
+	mutex_enter(&vp->v_lock);
+	may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp);
+	mutex_exit(&vp->v_lock);
+
+	/*
+	 * We may delete the znode now, or we may put it in the unlinked set;
+	 * it depends on whether we're the last link, and on whether there are
+	 * other holds on the vnode.  So we dmu_tx_hold() the right things to
+	 * allow for either case.
+	 */
+	obj = zp->z_id;
+	tx = dmu_tx_create(zfsvfs->z_os);
+	dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name);
+	dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+	zfs_sa_upgrade_txholds(tx, zp);
+	zfs_sa_upgrade_txholds(tx, dzp);
+	if (may_delete_now) {
+		toobig =
+		    zp->z_size > zp->z_blksz * DMU_MAX_DELETEBLKCNT;
+		/* if the file is too big, only hold_free a token amount */
+		dmu_tx_hold_free(tx, zp->z_id, 0,
+		    (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END));
+	}
+
+	/* are there any extended attributes? */
+	error = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
+	    &xattr_obj, sizeof (xattr_obj));
+	if (error == 0 && xattr_obj) {
+		error = zfs_zget(zfsvfs, xattr_obj, &xzp);
+		ASSERT3U(error, ==, 0);
+		dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+		dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE);
+	}
+
+	mutex_enter(&zp->z_lock);
+	if ((acl_obj = zfs_external_acl(zp)) != 0 && may_delete_now)
+		dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END);
+	mutex_exit(&zp->z_lock);
+
+	/* charge as an update -- would be nice not to charge at all */
+	dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+
+	error = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (error) {
+		zfs_dirent_unlock(dl);
+		VN_RELE(vp);
+		if (xzp)
+			VN_RELE(ZTOV(xzp));
+		if (error == ERESTART) {
+			dmu_tx_wait(tx);
+			dmu_tx_abort(tx);
+			goto top;
+		}
+		if (realnmp)
+			pn_free(realnmp);
+		dmu_tx_abort(tx);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	/*
+	 * Remove the directory entry.
+	 */
+	error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked);
+
+	if (error) {
+		dmu_tx_commit(tx);
+		goto out;
+	}
+
+	if (unlinked) {
+
+		/*
+		 * Hold z_lock so that we can make sure that the ACL obj
+		 * hasn't changed.  Could have been deleted due to
+		 * zfs_sa_upgrade().
+		 */
+		mutex_enter(&zp->z_lock);
+		mutex_enter(&vp->v_lock);
+		(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
+		    &xattr_obj_unlinked, sizeof (xattr_obj_unlinked));
+		delete_now = may_delete_now && !toobig &&
+		    vp->v_count == 1 && !vn_has_cached_data(vp) &&
+		    xattr_obj == xattr_obj_unlinked && zfs_external_acl(zp) ==
+		    acl_obj;
+		mutex_exit(&vp->v_lock);
+	}
+
+	if (delete_now) {
+		if (xattr_obj_unlinked) {
+			ASSERT3U(xzp->z_links, ==, 2);
+			mutex_enter(&xzp->z_lock);
+			xzp->z_unlinked = 1;
+			xzp->z_links = 0;
+			error = sa_update(xzp->z_sa_hdl, SA_ZPL_LINKS(zfsvfs),
+			    &xzp->z_links, sizeof (xzp->z_links), tx);
+			ASSERT3U(error,  ==,  0);
+			mutex_exit(&xzp->z_lock);
+			zfs_unlinked_add(xzp, tx);
+
+			if (zp->z_is_sa)
+				error = sa_remove(zp->z_sa_hdl,
+				    SA_ZPL_XATTR(zfsvfs), tx);
+			else
+				error = sa_update(zp->z_sa_hdl,
+				    SA_ZPL_XATTR(zfsvfs), &null_xattr,
+				    sizeof (uint64_t), tx);
+			ASSERT3U(error, ==, 0);
+		}
+		mutex_enter(&vp->v_lock);
+		vp->v_count--;
+		ASSERT3U(vp->v_count, ==, 0);
+		mutex_exit(&vp->v_lock);
+		mutex_exit(&zp->z_lock);
+		zfs_znode_delete(zp, tx);
+	} else if (unlinked) {
+		mutex_exit(&zp->z_lock);
+		zfs_unlinked_add(zp, tx);
+	}
+
+	txtype = TX_REMOVE;
+	if (flags & FIGNORECASE)
+		txtype |= TX_CI;
+	zfs_log_remove(zilog, tx, txtype, dzp, name, obj);
+
+	dmu_tx_commit(tx);
+out:
+	if (realnmp)
+		pn_free(realnmp);
+
+	zfs_dirent_unlock(dl);
+
+	if (!delete_now)
+		VN_RELE(vp);
+	if (xzp)
+		VN_RELE(ZTOV(xzp));
+
+	if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+		zil_commit(zilog, 0);
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * Create a new directory and insert it into dvp using the name
+ * provided.  Return a pointer to the inserted directory.
+ *
+ *	IN:	dvp	- vnode of directory to add subdir to.
+ *		dirname	- name of new directory.
+ *		vap	- attributes of new directory.
+ *		cr	- credentials of caller.
+ *		ct	- caller context
+ *		vsecp	- ACL to be set
+ *
+ *	OUT:	vpp	- vnode of created directory.
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	dvp - ctime|mtime updated
+ *	 vp - ctime|mtime|atime updated
+ */
+/*ARGSUSED*/
+static int
+zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr,
+    caller_context_t *ct, int flags, vsecattr_t *vsecp)
+{
+	znode_t		*zp, *dzp = VTOZ(dvp);
+	zfsvfs_t	*zfsvfs = dzp->z_zfsvfs;
+	zilog_t		*zilog;
+	zfs_dirlock_t	*dl;
+	uint64_t	txtype;
+	dmu_tx_t	*tx;
+	int		error;
+	int		zf = ZNEW;
+	ksid_t		*ksid;
+	uid_t		uid;
+	gid_t		gid = crgetgid(cr);
+	zfs_acl_ids_t   acl_ids;
+	boolean_t	fuid_dirtied;
+
+	ASSERT(vap->va_type == VDIR);
+
+	/*
+	 * If we have an ephemeral id, ACL, or XVATTR then
+	 * make sure file system is at proper version
+	 */
+
+	ksid = crgetsid(cr, KSID_OWNER);
+	if (ksid)
+		uid = ksid_getid(ksid);
+	else
+		uid = crgetuid(cr);
+	if (zfsvfs->z_use_fuids == B_FALSE &&
+	    (vsecp || (vap->va_mask & AT_XVATTR) ||
+	    IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
+		return (EINVAL);
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(dzp);
+	zilog = zfsvfs->z_log;
+
+	if (dzp->z_pflags & ZFS_XATTR) {
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+	if (zfsvfs->z_utf8 && u8_validate(dirname,
+	    strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+		ZFS_EXIT(zfsvfs);
+		return (EILSEQ);
+	}
+	if (flags & FIGNORECASE)
+		zf |= ZCILOOK;
+
+	if (vap->va_mask & AT_XVATTR) {
+		if ((error = secpolicy_xvattr((xvattr_t *)vap,
+		    crgetuid(cr), cr, vap->va_type)) != 0) {
+			ZFS_EXIT(zfsvfs);
+			return (error);
+		}
+	}
+
+	if ((error = zfs_acl_ids_create(dzp, 0, vap, cr,
+	    vsecp, &acl_ids)) != 0) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+	/*
+	 * First make sure the new directory doesn't exist.
+	 *
+	 * Existence is checked first to make sure we don't return
+	 * EACCES instead of EEXIST which can cause some applications
+	 * to fail.
+	 */
+top:
+	*vpp = NULL;
+
+	if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf,
+	    NULL, NULL)) {
+		zfs_acl_ids_free(&acl_ids);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr)) {
+		zfs_acl_ids_free(&acl_ids);
+		zfs_dirent_unlock(dl);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) {
+		zfs_acl_ids_free(&acl_ids);
+		zfs_dirent_unlock(dl);
+		ZFS_EXIT(zfsvfs);
+		return (EDQUOT);
+	}
+
+	/*
+	 * Add a new entry to the directory.
+	 */
+	tx = dmu_tx_create(zfsvfs->z_os);
+	dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname);
+	dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
+	fuid_dirtied = zfsvfs->z_fuid_dirty;
+	if (fuid_dirtied)
+		zfs_fuid_txhold(zfsvfs, tx);
+	if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+		dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
+		    acl_ids.z_aclp->z_acl_bytes);
+	}
+
+	dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
+	    ZFS_SA_BASE_ATTR_SIZE);
+
+	error = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (error) {
+		zfs_dirent_unlock(dl);
+		if (error == ERESTART) {
+			dmu_tx_wait(tx);
+			dmu_tx_abort(tx);
+			goto top;
+		}
+		zfs_acl_ids_free(&acl_ids);
+		dmu_tx_abort(tx);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	/*
+	 * Create new node.
+	 */
+	zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
+
+	if (fuid_dirtied)
+		zfs_fuid_sync(zfsvfs, tx);
+
+	/*
+	 * Now put new name in parent dir.
+	 */
+	(void) zfs_link_create(dl, zp, tx, ZNEW);
+
+	*vpp = ZTOV(zp);
+
+	txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap);
+	if (flags & FIGNORECASE)
+		txtype |= TX_CI;
+	zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp,
+	    acl_ids.z_fuidp, vap);
+
+	zfs_acl_ids_free(&acl_ids);
+
+	dmu_tx_commit(tx);
+
+	zfs_dirent_unlock(dl);
+
+	if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+		zil_commit(zilog, 0);
+
+	ZFS_EXIT(zfsvfs);
+	return (0);
+}
+
+/*
+ * Remove a directory subdir entry.  If the current working
+ * directory is the same as the subdir to be removed, the
+ * remove will fail.
+ *
+ *	IN:	dvp	- vnode of directory to remove from.
+ *		name	- name of directory to be removed.
+ *		cwd	- vnode of current working directory.
+ *		cr	- credentials of caller.
+ *		ct	- caller context
+ *		flags	- case flags
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	dvp - ctime|mtime updated
+ */
+/*ARGSUSED*/
+static int
+zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr,
+    caller_context_t *ct, int flags)
+{
+	znode_t		*dzp = VTOZ(dvp);
+	znode_t		*zp;
+	vnode_t		*vp;
+	zfsvfs_t	*zfsvfs = dzp->z_zfsvfs;
+	zilog_t		*zilog;
+	zfs_dirlock_t	*dl;
+	dmu_tx_t	*tx;
+	int		error;
+	int		zflg = ZEXISTS;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(dzp);
+	zilog = zfsvfs->z_log;
+
+	if (flags & FIGNORECASE)
+		zflg |= ZCILOOK;
+top:
+	zp = NULL;
+
+	/*
+	 * Attempt to lock directory; fail if entry doesn't exist.
+	 */
+	if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg,
+	    NULL, NULL)) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	vp = ZTOV(zp);
+
+	if (error = zfs_zaccess_delete(dzp, zp, cr)) {
+		goto out;
+	}
+
+	if (vp->v_type != VDIR) {
+		error = ENOTDIR;
+		goto out;
+	}
+
+	if (vp == cwd) {
+		error = EINVAL;
+		goto out;
+	}
+
+	vnevent_rmdir(vp, dvp, name, ct);
+
+	/*
+	 * Grab a lock on the directory to make sure that noone is
+	 * trying to add (or lookup) entries while we are removing it.
+	 */
+	rw_enter(&zp->z_name_lock, RW_WRITER);
+
+	/*
+	 * Grab a lock on the parent pointer to make sure we play well
+	 * with the treewalk and directory rename code.
+	 */
+	rw_enter(&zp->z_parent_lock, RW_WRITER);
+
+	tx = dmu_tx_create(zfsvfs->z_os);
+	dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name);
+	dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+	dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+	zfs_sa_upgrade_txholds(tx, zp);
+	zfs_sa_upgrade_txholds(tx, dzp);
+	error = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (error) {
+		rw_exit(&zp->z_parent_lock);
+		rw_exit(&zp->z_name_lock);
+		zfs_dirent_unlock(dl);
+		VN_RELE(vp);
+		if (error == ERESTART) {
+			dmu_tx_wait(tx);
+			dmu_tx_abort(tx);
+			goto top;
+		}
+		dmu_tx_abort(tx);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	error = zfs_link_destroy(dl, zp, tx, zflg, NULL);
+
+	if (error == 0) {
+		uint64_t txtype = TX_RMDIR;
+		if (flags & FIGNORECASE)
+			txtype |= TX_CI;
+		zfs_log_remove(zilog, tx, txtype, dzp, name, ZFS_NO_OBJECT);
+	}
+
+	dmu_tx_commit(tx);
+
+	rw_exit(&zp->z_parent_lock);
+	rw_exit(&zp->z_name_lock);
+out:
+	zfs_dirent_unlock(dl);
+
+	VN_RELE(vp);
+
+	if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+		zil_commit(zilog, 0);
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * Read as many directory entries as will fit into the provided
+ * buffer from the given directory cursor position (specified in
+ * the uio structure.
+ *
+ *	IN:	vp	- vnode of directory to read.
+ *		uio	- structure supplying read location, range info,
+ *			  and return buffer.
+ *		cr	- credentials of caller.
+ *		ct	- caller context
+ *		flags	- case flags
+ *
+ *	OUT:	uio	- updated offset and range, buffer filled.
+ *		eofp	- set to true if end-of-file detected.
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	vp - atime updated
+ *
+ * Note that the low 4 bits of the cookie returned by zap is always zero.
+ * This allows us to use the low range for "special" directory entries:
+ * We use 0 for '.', and 1 for '..'.  If this is the root of the filesystem,
+ * we use the offset 2 for the '.zfs' directory.
+ */
+/* ARGSUSED */
+static int
+zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp,
+    caller_context_t *ct, int flags)
+{
+	znode_t		*zp = VTOZ(vp);
+	iovec_t		*iovp;
+	edirent_t	*eodp;
+	dirent64_t	*odp;
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	objset_t	*os;
+	caddr_t		outbuf;
+	size_t		bufsize;
+	zap_cursor_t	zc;
+	zap_attribute_t	zap;
+	uint_t		bytes_wanted;
+	uint64_t	offset; /* must be unsigned; checks for < 1 */
+	uint64_t	parent;
+	int		local_eof;
+	int		outcount;
+	int		error;
+	uint8_t		prefetch;
+	boolean_t	check_sysattrs;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
+	    &parent, sizeof (parent))) != 0) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	/*
+	 * If we are not given an eof variable,
+	 * use a local one.
+	 */
+	if (eofp == NULL)
+		eofp = &local_eof;
+
+	/*
+	 * Check for valid iov_len.
+	 */
+	if (uio->uio_iov->iov_len <= 0) {
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+	/*
+	 * Quit if directory has been removed (posix)
+	 */
+	if ((*eofp = zp->z_unlinked) != 0) {
+		ZFS_EXIT(zfsvfs);
+		return (0);
+	}
+
+	error = 0;
+	os = zfsvfs->z_os;
+	offset = uio->uio_loffset;
+	prefetch = zp->z_zn_prefetch;
+
+	/*
+	 * Initialize the iterator cursor.
+	 */
+	if (offset <= 3) {
+		/*
+		 * Start iteration from the beginning of the directory.
+		 */
+		zap_cursor_init(&zc, os, zp->z_id);
+	} else {
+		/*
+		 * The offset is a serialized cursor.
+		 */
+		zap_cursor_init_serialized(&zc, os, zp->z_id, offset);
+	}
+
+	/*
+	 * Get space to change directory entries into fs independent format.
+	 */
+	iovp = uio->uio_iov;
+	bytes_wanted = iovp->iov_len;
+	if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) {
+		bufsize = bytes_wanted;
+		outbuf = kmem_alloc(bufsize, KM_SLEEP);
+		odp = (struct dirent64 *)outbuf;
+	} else {
+		bufsize = bytes_wanted;
+		odp = (struct dirent64 *)iovp->iov_base;
+	}
+	eodp = (struct edirent *)odp;
+
+	/*
+	 * If this VFS supports the system attribute view interface; and
+	 * we're looking at an extended attribute directory; and we care
+	 * about normalization conflicts on this vfs; then we must check
+	 * for normalization conflicts with the sysattr name space.
+	 */
+	check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) &&
+	    (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm &&
+	    (flags & V_RDDIR_ENTFLAGS);
+
+	/*
+	 * Transform to file-system independent format
+	 */
+	outcount = 0;
+	while (outcount < bytes_wanted) {
+		ino64_t objnum;
+		ushort_t reclen;
+		off64_t *next = NULL;
+
+		/*
+		 * Special case `.', `..', and `.zfs'.
+		 */
+		if (offset == 0) {
+			(void) strcpy(zap.za_name, ".");
+			zap.za_normalization_conflict = 0;
+			objnum = zp->z_id;
+		} else if (offset == 1) {
+			(void) strcpy(zap.za_name, "..");
+			zap.za_normalization_conflict = 0;
+			objnum = parent;
+		} else if (offset == 2 && zfs_show_ctldir(zp)) {
+			(void) strcpy(zap.za_name, ZFS_CTLDIR_NAME);
+			zap.za_normalization_conflict = 0;
+			objnum = ZFSCTL_INO_ROOT;
+		} else {
+			/*
+			 * Grab next entry.
+			 */
+			if (error = zap_cursor_retrieve(&zc, &zap)) {
+				if ((*eofp = (error == ENOENT)) != 0)
+					break;
+				else
+					goto update;
+			}
+
+			if (zap.za_integer_length != 8 ||
+			    zap.za_num_integers != 1) {
+				cmn_err(CE_WARN, "zap_readdir: bad directory "
+				    "entry, obj = %lld, offset = %lld\n",
+				    (u_longlong_t)zp->z_id,
+				    (u_longlong_t)offset);
+				error = ENXIO;
+				goto update;
+			}
+
+			objnum = ZFS_DIRENT_OBJ(zap.za_first_integer);
+			/*
+			 * MacOS X can extract the object type here such as:
+			 * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer);
+			 */
+
+			if (check_sysattrs && !zap.za_normalization_conflict) {
+				zap.za_normalization_conflict =
+				    xattr_sysattr_casechk(zap.za_name);
+			}
+		}
+
+		if (flags & V_RDDIR_ACCFILTER) {
+			/*
+			 * If we have no access at all, don't include
+			 * this entry in the returned information
+			 */
+			znode_t	*ezp;
+			if (zfs_zget(zp->z_zfsvfs, objnum, &ezp) != 0)
+				goto skip_entry;
+			if (!zfs_has_access(ezp, cr)) {
+				VN_RELE(ZTOV(ezp));
+				goto skip_entry;
+			}
+			VN_RELE(ZTOV(ezp));
+		}
+
+		if (flags & V_RDDIR_ENTFLAGS)
+			reclen = EDIRENT_RECLEN(strlen(zap.za_name));
+		else
+			reclen = DIRENT64_RECLEN(strlen(zap.za_name));
+
+		/*
+		 * Will this entry fit in the buffer?
+		 */
+		if (outcount + reclen > bufsize) {
+			/*
+			 * Did we manage to fit anything in the buffer?
+			 */
+			if (!outcount) {
+				error = EINVAL;
+				goto update;
+			}
+			break;
+		}
+		if (flags & V_RDDIR_ENTFLAGS) {
+			/*
+			 * Add extended flag entry:
+			 */
+			eodp->ed_ino = objnum;
+			eodp->ed_reclen = reclen;
+			/* NOTE: ed_off is the offset for the *next* entry */
+			next = &(eodp->ed_off);
+			eodp->ed_eflags = zap.za_normalization_conflict ?
+			    ED_CASE_CONFLICT : 0;
+			(void) strncpy(eodp->ed_name, zap.za_name,
+			    EDIRENT_NAMELEN(reclen));
+			eodp = (edirent_t *)((intptr_t)eodp + reclen);
+		} else {
+			/*
+			 * Add normal entry:
+			 */
+			odp->d_ino = objnum;
+			odp->d_reclen = reclen;
+			/* NOTE: d_off is the offset for the *next* entry */
+			next = &(odp->d_off);
+			(void) strncpy(odp->d_name, zap.za_name,
+			    DIRENT64_NAMELEN(reclen));
+			odp = (dirent64_t *)((intptr_t)odp + reclen);
+		}
+		outcount += reclen;
+
+		ASSERT(outcount <= bufsize);
+
+		/* Prefetch znode */
+		if (prefetch)
+			dmu_prefetch(os, objnum, 0, 0);
+
+	skip_entry:
+		/*
+		 * Move to the next entry, fill in the previous offset.
+		 */
+		if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) {
+			zap_cursor_advance(&zc);
+			offset = zap_cursor_serialize(&zc);
+		} else {
+			offset += 1;
+		}
+		if (next)
+			*next = offset;
+	}
+	zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */
+
+	if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) {
+		iovp->iov_base += outcount;
+		iovp->iov_len -= outcount;
+		uio->uio_resid -= outcount;
+	} else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) {
+		/*
+		 * Reset the pointer.
+		 */
+		offset = uio->uio_loffset;
+	}
+
+update:
+	zap_cursor_fini(&zc);
+	if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
+		kmem_free(outbuf, bufsize);
+
+	if (error == ENOENT)
+		error = 0;
+
+	ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
+
+	uio->uio_loffset = offset;
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+ulong_t zfs_fsync_sync_cnt = 4;
+
+static int
+zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct)
+{
+	znode_t	*zp = VTOZ(vp);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+
+	/*
+	 * Regardless of whether this is required for standards conformance,
+	 * this is the logical behavior when fsync() is called on a file with
+	 * dirty pages.  We use B_ASYNC since the ZIL transactions are already
+	 * going to be pushed out as part of the zil_commit().
+	 */
+	if (vn_has_cached_data(vp) && !(syncflag & FNODSYNC) &&
+	    (vp->v_type == VREG) && !(IS_SWAPVP(vp)))
+		(void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, B_ASYNC, cr, ct);
+
+	(void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt);
+
+	if (zfsvfs->z_os->os_sync != ZFS_SYNC_DISABLED) {
+		ZFS_ENTER(zfsvfs);
+		ZFS_VERIFY_ZP(zp);
+		zil_commit(zfsvfs->z_log, zp->z_id);
+		ZFS_EXIT(zfsvfs);
+	}
+	return (0);
+}
+
+
+/*
+ * Get the requested file attributes and place them in the provided
+ * vattr structure.
+ *
+ *	IN:	vp	- vnode of file.
+ *		vap	- va_mask identifies requested attributes.
+ *			  If AT_XVATTR set, then optional attrs are requested
+ *		flags	- ATTR_NOACLCHECK (CIFS server context)
+ *		cr	- credentials of caller.
+ *		ct	- caller context
+ *
+ *	OUT:	vap	- attribute values.
+ *
+ *	RETURN:	0 (always succeeds)
+ */
+/* ARGSUSED */
+static int
+zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
+    caller_context_t *ct)
+{
+	znode_t *zp = VTOZ(vp);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	int	error = 0;
+	uint64_t links;
+	uint64_t mtime[2], ctime[2];
+	xvattr_t *xvap = (xvattr_t *)vap;	/* vap may be an xvattr_t * */
+	xoptattr_t *xoap = NULL;
+	boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
+	sa_bulk_attr_t bulk[2];
+	int count = 0;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid);
+
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
+
+	if ((error = sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) != 0) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	/*
+	 * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES.
+	 * Also, if we are the owner don't bother, since owner should
+	 * always be allowed to read basic attributes of file.
+	 */
+	if (!(zp->z_pflags & ZFS_ACL_TRIVIAL) &&
+	    (vap->va_uid != crgetuid(cr))) {
+		if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0,
+		    skipaclchk, cr)) {
+			ZFS_EXIT(zfsvfs);
+			return (error);
+		}
+	}
+
+	/*
+	 * Return all attributes.  It's cheaper to provide the answer
+	 * than to determine whether we were asked the question.
+	 */
+
+	mutex_enter(&zp->z_lock);
+	vap->va_type = vp->v_type;
+	vap->va_mode = zp->z_mode & MODEMASK;
+	vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev;
+	vap->va_nodeid = zp->z_id;
+	if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp))
+		links = zp->z_links + 1;
+	else
+		links = zp->z_links;
+	vap->va_nlink = MIN(links, UINT32_MAX);	/* nlink_t limit! */
+	vap->va_size = zp->z_size;
+	vap->va_rdev = vp->v_rdev;
+	vap->va_seq = zp->z_seq;
+
+	/*
+	 * Add in any requested optional attributes and the create time.
+	 * Also set the corresponding bits in the returned attribute bitmap.
+	 */
+	if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) {
+		if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) {
+			xoap->xoa_archive =
+			    ((zp->z_pflags & ZFS_ARCHIVE) != 0);
+			XVA_SET_RTN(xvap, XAT_ARCHIVE);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_READONLY)) {
+			xoap->xoa_readonly =
+			    ((zp->z_pflags & ZFS_READONLY) != 0);
+			XVA_SET_RTN(xvap, XAT_READONLY);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) {
+			xoap->xoa_system =
+			    ((zp->z_pflags & ZFS_SYSTEM) != 0);
+			XVA_SET_RTN(xvap, XAT_SYSTEM);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) {
+			xoap->xoa_hidden =
+			    ((zp->z_pflags & ZFS_HIDDEN) != 0);
+			XVA_SET_RTN(xvap, XAT_HIDDEN);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
+			xoap->xoa_nounlink =
+			    ((zp->z_pflags & ZFS_NOUNLINK) != 0);
+			XVA_SET_RTN(xvap, XAT_NOUNLINK);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
+			xoap->xoa_immutable =
+			    ((zp->z_pflags & ZFS_IMMUTABLE) != 0);
+			XVA_SET_RTN(xvap, XAT_IMMUTABLE);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
+			xoap->xoa_appendonly =
+			    ((zp->z_pflags & ZFS_APPENDONLY) != 0);
+			XVA_SET_RTN(xvap, XAT_APPENDONLY);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
+			xoap->xoa_nodump =
+			    ((zp->z_pflags & ZFS_NODUMP) != 0);
+			XVA_SET_RTN(xvap, XAT_NODUMP);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) {
+			xoap->xoa_opaque =
+			    ((zp->z_pflags & ZFS_OPAQUE) != 0);
+			XVA_SET_RTN(xvap, XAT_OPAQUE);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
+			xoap->xoa_av_quarantined =
+			    ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0);
+			XVA_SET_RTN(xvap, XAT_AV_QUARANTINED);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
+			xoap->xoa_av_modified =
+			    ((zp->z_pflags & ZFS_AV_MODIFIED) != 0);
+			XVA_SET_RTN(xvap, XAT_AV_MODIFIED);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) &&
+		    vp->v_type == VREG) {
+			zfs_sa_get_scanstamp(zp, xvap);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) {
+			uint64_t times[2];
+
+			(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_CRTIME(zfsvfs),
+			    times, sizeof (times));
+			ZFS_TIME_DECODE(&xoap->xoa_createtime, times);
+			XVA_SET_RTN(xvap, XAT_CREATETIME);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) {
+			xoap->xoa_reparse = ((zp->z_pflags & ZFS_REPARSE) != 0);
+			XVA_SET_RTN(xvap, XAT_REPARSE);
+		}
+		if (XVA_ISSET_REQ(xvap, XAT_GEN)) {
+			xoap->xoa_generation = zp->z_gen;
+			XVA_SET_RTN(xvap, XAT_GEN);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) {
+			xoap->xoa_offline =
+			    ((zp->z_pflags & ZFS_OFFLINE) != 0);
+			XVA_SET_RTN(xvap, XAT_OFFLINE);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) {
+			xoap->xoa_sparse =
+			    ((zp->z_pflags & ZFS_SPARSE) != 0);
+			XVA_SET_RTN(xvap, XAT_SPARSE);
+		}
+	}
+
+	ZFS_TIME_DECODE(&vap->va_atime, zp->z_atime);
+	ZFS_TIME_DECODE(&vap->va_mtime, mtime);
+	ZFS_TIME_DECODE(&vap->va_ctime, ctime);
+
+	mutex_exit(&zp->z_lock);
+
+	sa_object_size(zp->z_sa_hdl, &vap->va_blksize, &vap->va_nblocks);
+
+	if (zp->z_blksz == 0) {
+		/*
+		 * Block size hasn't been set; suggest maximal I/O transfers.
+		 */
+		vap->va_blksize = zfsvfs->z_max_blksz;
+	}
+
+	ZFS_EXIT(zfsvfs);
+	return (0);
+}
+
+/*
+ * Set the file attributes to the values contained in the
+ * vattr structure.
+ *
+ *	IN:	vp	- vnode of file to be modified.
+ *		vap	- new attribute values.
+ *			  If AT_XVATTR set, then optional attrs are being set
+ *		flags	- ATTR_UTIME set if non-default time values provided.
+ *			- ATTR_NOACLCHECK (CIFS context only).
+ *		cr	- credentials of caller.
+ *		ct	- caller context
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	vp - ctime updated, mtime updated if size changed.
+ */
+/* ARGSUSED */
+static int
+zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
+	caller_context_t *ct)
+{
+	znode_t		*zp = VTOZ(vp);
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	zilog_t		*zilog;
+	dmu_tx_t	*tx;
+	vattr_t		oldva;
+	xvattr_t	tmpxvattr;
+	uint_t		mask = vap->va_mask;
+	uint_t		saved_mask;
+	int		trim_mask = 0;
+	uint64_t	new_mode;
+	uint64_t	new_uid, new_gid;
+	uint64_t	xattr_obj;
+	uint64_t	mtime[2], ctime[2];
+	znode_t		*attrzp;
+	int		need_policy = FALSE;
+	int		err, err2;
+	zfs_fuid_info_t *fuidp = NULL;
+	xvattr_t *xvap = (xvattr_t *)vap;	/* vap may be an xvattr_t * */
+	xoptattr_t	*xoap;
+	zfs_acl_t	*aclp;
+	boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
+	boolean_t	fuid_dirtied = B_FALSE;
+	sa_bulk_attr_t	bulk[7], xattr_bulk[7];
+	int		count = 0, xattr_count = 0;
+
+	if (mask == 0)
+		return (0);
+
+	if (mask & AT_NOSET)
+		return (EINVAL);
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	zilog = zfsvfs->z_log;
+
+	/*
+	 * Make sure that if we have ephemeral uid/gid or xvattr specified
+	 * that file system is at proper version level
+	 */
+
+	if (zfsvfs->z_use_fuids == B_FALSE &&
+	    (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) ||
+	    ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) ||
+	    (mask & AT_XVATTR))) {
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+	if (mask & AT_SIZE && vp->v_type == VDIR) {
+		ZFS_EXIT(zfsvfs);
+		return (EISDIR);
+	}
+
+	if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) {
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+	/*
+	 * If this is an xvattr_t, then get a pointer to the structure of
+	 * optional attributes.  If this is NULL, then we have a vattr_t.
+	 */
+	xoap = xva_getxoptattr(xvap);
+
+	xva_init(&tmpxvattr);
+
+	/*
+	 * Immutable files can only alter immutable bit and atime
+	 */
+	if ((zp->z_pflags & ZFS_IMMUTABLE) &&
+	    ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) ||
+	    ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) {
+		ZFS_EXIT(zfsvfs);
+		return (EPERM);
+	}
+
+	if ((mask & AT_SIZE) && (zp->z_pflags & ZFS_READONLY)) {
+		ZFS_EXIT(zfsvfs);
+		return (EPERM);
+	}
+
+	/*
+	 * Verify timestamps doesn't overflow 32 bits.
+	 * ZFS can handle large timestamps, but 32bit syscalls can't
+	 * handle times greater than 2039.  This check should be removed
+	 * once large timestamps are fully supported.
+	 */
+	if (mask & (AT_ATIME | AT_MTIME)) {
+		if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) ||
+		    ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) {
+			ZFS_EXIT(zfsvfs);
+			return (EOVERFLOW);
+		}
+	}
+
+top:
+	attrzp = NULL;
+	aclp = NULL;
+
+	/* Can this be moved to before the top label? */
+	if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) {
+		ZFS_EXIT(zfsvfs);
+		return (EROFS);
+	}
+
+	/*
+	 * First validate permissions
+	 */
+
+	if (mask & AT_SIZE) {
+		err = zfs_zaccess(zp, ACE_WRITE_DATA, 0, skipaclchk, cr);
+		if (err) {
+			ZFS_EXIT(zfsvfs);
+			return (err);
+		}
+		/*
+		 * XXX - Note, we are not providing any open
+		 * mode flags here (like FNDELAY), so we may
+		 * block if there are locks present... this
+		 * should be addressed in openat().
+		 */
+		/* XXX - would it be OK to generate a log record here? */
+		err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE);
+		if (err) {
+			ZFS_EXIT(zfsvfs);
+			return (err);
+		}
+	}
+
+	if (mask & (AT_ATIME|AT_MTIME) ||
+	    ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) ||
+	    XVA_ISSET_REQ(xvap, XAT_READONLY) ||
+	    XVA_ISSET_REQ(xvap, XAT_ARCHIVE) ||
+	    XVA_ISSET_REQ(xvap, XAT_OFFLINE) ||
+	    XVA_ISSET_REQ(xvap, XAT_SPARSE) ||
+	    XVA_ISSET_REQ(xvap, XAT_CREATETIME) ||
+	    XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) {
+		need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0,
+		    skipaclchk, cr);
+	}
+
+	if (mask & (AT_UID|AT_GID)) {
+		int	idmask = (mask & (AT_UID|AT_GID));
+		int	take_owner;
+		int	take_group;
+
+		/*
+		 * NOTE: even if a new mode is being set,
+		 * we may clear S_ISUID/S_ISGID bits.
+		 */
+
+		if (!(mask & AT_MODE))
+			vap->va_mode = zp->z_mode;
+
+		/*
+		 * Take ownership or chgrp to group we are a member of
+		 */
+
+		take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr));
+		take_group = (mask & AT_GID) &&
+		    zfs_groupmember(zfsvfs, vap->va_gid, cr);
+
+		/*
+		 * If both AT_UID and AT_GID are set then take_owner and
+		 * take_group must both be set in order to allow taking
+		 * ownership.
+		 *
+		 * Otherwise, send the check through secpolicy_vnode_setattr()
+		 *
+		 */
+
+		if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) ||
+		    ((idmask == AT_UID) && take_owner) ||
+		    ((idmask == AT_GID) && take_group)) {
+			if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0,
+			    skipaclchk, cr) == 0) {
+				/*
+				 * Remove setuid/setgid for non-privileged users
+				 */
+				secpolicy_setid_clear(vap, cr);
+				trim_mask = (mask & (AT_UID|AT_GID));
+			} else {
+				need_policy =  TRUE;
+			}
+		} else {
+			need_policy =  TRUE;
+		}
+	}
+
+	mutex_enter(&zp->z_lock);
+	oldva.va_mode = zp->z_mode;
+	zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid);
+	if (mask & AT_XVATTR) {
+		/*
+		 * Update xvattr mask to include only those attributes
+		 * that are actually changing.
+		 *
+		 * the bits will be restored prior to actually setting
+		 * the attributes so the caller thinks they were set.
+		 */
+		if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
+			if (xoap->xoa_appendonly !=
+			    ((zp->z_pflags & ZFS_APPENDONLY) != 0)) {
+				need_policy = TRUE;
+			} else {
+				XVA_CLR_REQ(xvap, XAT_APPENDONLY);
+				XVA_SET_REQ(&tmpxvattr, XAT_APPENDONLY);
+			}
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
+			if (xoap->xoa_nounlink !=
+			    ((zp->z_pflags & ZFS_NOUNLINK) != 0)) {
+				need_policy = TRUE;
+			} else {
+				XVA_CLR_REQ(xvap, XAT_NOUNLINK);
+				XVA_SET_REQ(&tmpxvattr, XAT_NOUNLINK);
+			}
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
+			if (xoap->xoa_immutable !=
+			    ((zp->z_pflags & ZFS_IMMUTABLE) != 0)) {
+				need_policy = TRUE;
+			} else {
+				XVA_CLR_REQ(xvap, XAT_IMMUTABLE);
+				XVA_SET_REQ(&tmpxvattr, XAT_IMMUTABLE);
+			}
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
+			if (xoap->xoa_nodump !=
+			    ((zp->z_pflags & ZFS_NODUMP) != 0)) {
+				need_policy = TRUE;
+			} else {
+				XVA_CLR_REQ(xvap, XAT_NODUMP);
+				XVA_SET_REQ(&tmpxvattr, XAT_NODUMP);
+			}
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
+			if (xoap->xoa_av_modified !=
+			    ((zp->z_pflags & ZFS_AV_MODIFIED) != 0)) {
+				need_policy = TRUE;
+			} else {
+				XVA_CLR_REQ(xvap, XAT_AV_MODIFIED);
+				XVA_SET_REQ(&tmpxvattr, XAT_AV_MODIFIED);
+			}
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
+			if ((vp->v_type != VREG &&
+			    xoap->xoa_av_quarantined) ||
+			    xoap->xoa_av_quarantined !=
+			    ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0)) {
+				need_policy = TRUE;
+			} else {
+				XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED);
+				XVA_SET_REQ(&tmpxvattr, XAT_AV_QUARANTINED);
+			}
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) {
+			mutex_exit(&zp->z_lock);
+			ZFS_EXIT(zfsvfs);
+			return (EPERM);
+		}
+
+		if (need_policy == FALSE &&
+		    (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) ||
+		    XVA_ISSET_REQ(xvap, XAT_OPAQUE))) {
+			need_policy = TRUE;
+		}
+	}
+
+	mutex_exit(&zp->z_lock);
+
+	if (mask & AT_MODE) {
+		if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) {
+			err = secpolicy_setid_setsticky_clear(vp, vap,
+			    &oldva, cr);
+			if (err) {
+				ZFS_EXIT(zfsvfs);
+				return (err);
+			}
+			trim_mask |= AT_MODE;
+		} else {
+			need_policy = TRUE;
+		}
+	}
+
+	if (need_policy) {
+		/*
+		 * If trim_mask is set then take ownership
+		 * has been granted or write_acl is present and user
+		 * has the ability to modify mode.  In that case remove
+		 * UID|GID and or MODE from mask so that
+		 * secpolicy_vnode_setattr() doesn't revoke it.
+		 */
+
+		if (trim_mask) {
+			saved_mask = vap->va_mask;
+			vap->va_mask &= ~trim_mask;
+		}
+		err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags,
+		    (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp);
+		if (err) {
+			ZFS_EXIT(zfsvfs);
+			return (err);
+		}
+
+		if (trim_mask)
+			vap->va_mask |= saved_mask;
+	}
+
+	/*
+	 * secpolicy_vnode_setattr, or take ownership may have
+	 * changed va_mask
+	 */
+	mask = vap->va_mask;
+
+	if ((mask & (AT_UID | AT_GID))) {
+		err = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
+		    &xattr_obj, sizeof (xattr_obj));
+
+		if (err == 0 && xattr_obj) {
+			err = zfs_zget(zp->z_zfsvfs, xattr_obj, &attrzp);
+			if (err)
+				goto out2;
+		}
+		if (mask & AT_UID) {
+			new_uid = zfs_fuid_create(zfsvfs,
+			    (uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp);
+			if (new_uid != zp->z_uid &&
+			    zfs_fuid_overquota(zfsvfs, B_FALSE, new_uid)) {
+				if (attrzp)
+					VN_RELE(ZTOV(attrzp));
+				err = EDQUOT;
+				goto out2;
+			}
+		}
+
+		if (mask & AT_GID) {
+			new_gid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_gid,
+			    cr, ZFS_GROUP, &fuidp);
+			if (new_gid != zp->z_gid &&
+			    zfs_fuid_overquota(zfsvfs, B_TRUE, new_gid)) {
+				if (attrzp)
+					VN_RELE(ZTOV(attrzp));
+				err = EDQUOT;
+				goto out2;
+			}
+		}
+	}
+	tx = dmu_tx_create(zfsvfs->z_os);
+
+	if (mask & AT_MODE) {
+		uint64_t pmode = zp->z_mode;
+		uint64_t acl_obj;
+		new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT);
+
+		zfs_acl_chmod_setattr(zp, &aclp, new_mode);
+
+		mutex_enter(&zp->z_lock);
+		if (!zp->z_is_sa && ((acl_obj = zfs_external_acl(zp)) != 0)) {
+			/*
+			 * Are we upgrading ACL from old V0 format
+			 * to V1 format?
+			 */
+			if (zfsvfs->z_version >= ZPL_VERSION_FUID &&
+			    zfs_znode_acl_version(zp) ==
+			    ZFS_ACL_VERSION_INITIAL) {
+				dmu_tx_hold_free(tx, acl_obj, 0,
+				    DMU_OBJECT_END);
+				dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
+				    0, aclp->z_acl_bytes);
+			} else {
+				dmu_tx_hold_write(tx, acl_obj, 0,
+				    aclp->z_acl_bytes);
+			}
+		} else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+			dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
+			    0, aclp->z_acl_bytes);
+		}
+		mutex_exit(&zp->z_lock);
+		dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+	} else {
+		if ((mask & AT_XVATTR) &&
+		    XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP))
+			dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+		else
+			dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+	}
+
+	if (attrzp) {
+		dmu_tx_hold_sa(tx, attrzp->z_sa_hdl, B_FALSE);
+	}
+
+	fuid_dirtied = zfsvfs->z_fuid_dirty;
+	if (fuid_dirtied)
+		zfs_fuid_txhold(zfsvfs, tx);
+
+	zfs_sa_upgrade_txholds(tx, zp);
+
+	err = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (err) {
+		if (err == ERESTART)
+			dmu_tx_wait(tx);
+		goto out;
+	}
+
+	count = 0;
+	/*
+	 * Set each attribute requested.
+	 * We group settings according to the locks they need to acquire.
+	 *
+	 * Note: you cannot set ctime directly, although it will be
+	 * updated as a side-effect of calling this function.
+	 */
+
+
+	if (mask & (AT_UID|AT_GID|AT_MODE))
+		mutex_enter(&zp->z_acl_lock);
+	mutex_enter(&zp->z_lock);
+
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+	    &zp->z_pflags, sizeof (zp->z_pflags));
+
+	if (attrzp) {
+		if (mask & (AT_UID|AT_GID|AT_MODE))
+			mutex_enter(&attrzp->z_acl_lock);
+		mutex_enter(&attrzp->z_lock);
+		SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+		    SA_ZPL_FLAGS(zfsvfs), NULL, &attrzp->z_pflags,
+		    sizeof (attrzp->z_pflags));
+	}
+
+	if (mask & (AT_UID|AT_GID)) {
+
+		if (mask & AT_UID) {
+			SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
+			    &new_uid, sizeof (new_uid));
+			zp->z_uid = new_uid;
+			if (attrzp) {
+				SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+				    SA_ZPL_UID(zfsvfs), NULL, &new_uid,
+				    sizeof (new_uid));
+				attrzp->z_uid = new_uid;
+			}
+		}
+
+		if (mask & AT_GID) {
+			SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs),
+			    NULL, &new_gid, sizeof (new_gid));
+			zp->z_gid = new_gid;
+			if (attrzp) {
+				SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+				    SA_ZPL_GID(zfsvfs), NULL, &new_gid,
+				    sizeof (new_gid));
+				attrzp->z_gid = new_gid;
+			}
+		}
+		if (!(mask & AT_MODE)) {
+			SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs),
+			    NULL, &new_mode, sizeof (new_mode));
+			new_mode = zp->z_mode;
+		}
+		err = zfs_acl_chown_setattr(zp);
+		ASSERT(err == 0);
+		if (attrzp) {
+			err = zfs_acl_chown_setattr(attrzp);
+			ASSERT(err == 0);
+		}
+	}
+
+	if (mask & AT_MODE) {
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
+		    &new_mode, sizeof (new_mode));
+		zp->z_mode = new_mode;
+		ASSERT3U((uintptr_t)aclp, !=, NULL);
+		err = zfs_aclset_common(zp, aclp, cr, tx);
+		ASSERT3U(err, ==, 0);
+		if (zp->z_acl_cached)
+			zfs_acl_free(zp->z_acl_cached);
+		zp->z_acl_cached = aclp;
+		aclp = NULL;
+	}
+
+
+	if (mask & AT_ATIME) {
+		ZFS_TIME_ENCODE(&vap->va_atime, zp->z_atime);
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
+		    &zp->z_atime, sizeof (zp->z_atime));
+	}
+
+	if (mask & AT_MTIME) {
+		ZFS_TIME_ENCODE(&vap->va_mtime, mtime);
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
+		    mtime, sizeof (mtime));
+	}
+
+	/* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */
+	if (mask & AT_SIZE && !(mask & AT_MTIME)) {
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs),
+		    NULL, mtime, sizeof (mtime));
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
+		    &ctime, sizeof (ctime));
+		zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime,
+		    B_TRUE);
+	} else if (mask != 0) {
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
+		    &ctime, sizeof (ctime));
+		zfs_tstamp_update_setup(zp, STATE_CHANGED, mtime, ctime,
+		    B_TRUE);
+		if (attrzp) {
+			SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+			    SA_ZPL_CTIME(zfsvfs), NULL,
+			    &ctime, sizeof (ctime));
+			zfs_tstamp_update_setup(attrzp, STATE_CHANGED,
+			    mtime, ctime, B_TRUE);
+		}
+	}
+	/*
+	 * Do this after setting timestamps to prevent timestamp
+	 * update from toggling bit
+	 */
+
+	if (xoap && (mask & AT_XVATTR)) {
+
+		/*
+		 * restore trimmed off masks
+		 * so that return masks can be set for caller.
+		 */
+
+		if (XVA_ISSET_REQ(&tmpxvattr, XAT_APPENDONLY)) {
+			XVA_SET_REQ(xvap, XAT_APPENDONLY);
+		}
+		if (XVA_ISSET_REQ(&tmpxvattr, XAT_NOUNLINK)) {
+			XVA_SET_REQ(xvap, XAT_NOUNLINK);
+		}
+		if (XVA_ISSET_REQ(&tmpxvattr, XAT_IMMUTABLE)) {
+			XVA_SET_REQ(xvap, XAT_IMMUTABLE);
+		}
+		if (XVA_ISSET_REQ(&tmpxvattr, XAT_NODUMP)) {
+			XVA_SET_REQ(xvap, XAT_NODUMP);
+		}
+		if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_MODIFIED)) {
+			XVA_SET_REQ(xvap, XAT_AV_MODIFIED);
+		}
+		if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_QUARANTINED)) {
+			XVA_SET_REQ(xvap, XAT_AV_QUARANTINED);
+		}
+
+		if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP))
+			ASSERT(vp->v_type == VREG);
+
+		zfs_xvattr_set(zp, xvap, tx);
+	}
+
+	if (fuid_dirtied)
+		zfs_fuid_sync(zfsvfs, tx);
+
+	if (mask != 0)
+		zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp);
+
+	mutex_exit(&zp->z_lock);
+	if (mask & (AT_UID|AT_GID|AT_MODE))
+		mutex_exit(&zp->z_acl_lock);
+
+	if (attrzp) {
+		if (mask & (AT_UID|AT_GID|AT_MODE))
+			mutex_exit(&attrzp->z_acl_lock);
+		mutex_exit(&attrzp->z_lock);
+	}
+out:
+	if (err == 0 && attrzp) {
+		err2 = sa_bulk_update(attrzp->z_sa_hdl, xattr_bulk,
+		    xattr_count, tx);
+		ASSERT(err2 == 0);
+	}
+
+	if (attrzp)
+		VN_RELE(ZTOV(attrzp));
+	if (aclp)
+		zfs_acl_free(aclp);
+
+	if (fuidp) {
+		zfs_fuid_info_free(fuidp);
+		fuidp = NULL;
+	}
+
+	if (err) {
+		dmu_tx_abort(tx);
+		if (err == ERESTART)
+			goto top;
+	} else {
+		err2 = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
+		dmu_tx_commit(tx);
+	}
+
+out2:
+	if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+		zil_commit(zilog, 0);
+
+	ZFS_EXIT(zfsvfs);
+	return (err);
+}
+
+typedef struct zfs_zlock {
+	krwlock_t	*zl_rwlock;	/* lock we acquired */
+	znode_t		*zl_znode;	/* znode we held */
+	struct zfs_zlock *zl_next;	/* next in list */
+} zfs_zlock_t;
+
+/*
+ * Drop locks and release vnodes that were held by zfs_rename_lock().
+ */
+static void
+zfs_rename_unlock(zfs_zlock_t **zlpp)
+{
+	zfs_zlock_t *zl;
+
+	while ((zl = *zlpp) != NULL) {
+		if (zl->zl_znode != NULL)
+			VN_RELE(ZTOV(zl->zl_znode));
+		rw_exit(zl->zl_rwlock);
+		*zlpp = zl->zl_next;
+		kmem_free(zl, sizeof (*zl));
+	}
+}
+
+/*
+ * Search back through the directory tree, using the ".." entries.
+ * Lock each directory in the chain to prevent concurrent renames.
+ * Fail any attempt to move a directory into one of its own descendants.
+ * XXX - z_parent_lock can overlap with map or grow locks
+ */
+static int
+zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp)
+{
+	zfs_zlock_t	*zl;
+	znode_t		*zp = tdzp;
+	uint64_t	rootid = zp->z_zfsvfs->z_root;
+	uint64_t	oidp = zp->z_id;
+	krwlock_t	*rwlp = &szp->z_parent_lock;
+	krw_t		rw = RW_WRITER;
+
+	/*
+	 * First pass write-locks szp and compares to zp->z_id.
+	 * Later passes read-lock zp and compare to zp->z_parent.
+	 */
+	do {
+		if (!rw_tryenter(rwlp, rw)) {
+			/*
+			 * Another thread is renaming in this path.
+			 * Note that if we are a WRITER, we don't have any
+			 * parent_locks held yet.
+			 */
+			if (rw == RW_READER && zp->z_id > szp->z_id) {
+				/*
+				 * Drop our locks and restart
+				 */
+				zfs_rename_unlock(&zl);
+				*zlpp = NULL;
+				zp = tdzp;
+				oidp = zp->z_id;
+				rwlp = &szp->z_parent_lock;
+				rw = RW_WRITER;
+				continue;
+			} else {
+				/*
+				 * Wait for other thread to drop its locks
+				 */
+				rw_enter(rwlp, rw);
+			}
+		}
+
+		zl = kmem_alloc(sizeof (*zl), KM_SLEEP);
+		zl->zl_rwlock = rwlp;
+		zl->zl_znode = NULL;
+		zl->zl_next = *zlpp;
+		*zlpp = zl;
+
+		if (oidp == szp->z_id)		/* We're a descendant of szp */
+			return (EINVAL);
+
+		if (oidp == rootid)		/* We've hit the top */
+			return (0);
+
+		if (rw == RW_READER) {		/* i.e. not the first pass */
+			int error = zfs_zget(zp->z_zfsvfs, oidp, &zp);
+			if (error)
+				return (error);
+			zl->zl_znode = zp;
+		}
+		(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zp->z_zfsvfs),
+		    &oidp, sizeof (oidp));
+		rwlp = &zp->z_parent_lock;
+		rw = RW_READER;
+
+	} while (zp->z_id != sdzp->z_id);
+
+	return (0);
+}
+
+/*
+ * Move an entry from the provided source directory to the target
+ * directory.  Change the entry name as indicated.
+ *
+ *	IN:	sdvp	- Source directory containing the "old entry".
+ *		snm	- Old entry name.
+ *		tdvp	- Target directory to contain the "new entry".
+ *		tnm	- New entry name.
+ *		cr	- credentials of caller.
+ *		ct	- caller context
+ *		flags	- case flags
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	sdvp,tdvp - ctime|mtime updated
+ */
+/*ARGSUSED*/
+static int
+zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr,
+    caller_context_t *ct, int flags)
+{
+	znode_t		*tdzp, *szp, *tzp;
+	znode_t		*sdzp = VTOZ(sdvp);
+	zfsvfs_t	*zfsvfs = sdzp->z_zfsvfs;
+	zilog_t		*zilog;
+	vnode_t		*realvp;
+	zfs_dirlock_t	*sdl, *tdl;
+	dmu_tx_t	*tx;
+	zfs_zlock_t	*zl;
+	int		cmp, serr, terr;
+	int		error = 0;
+	int		zflg = 0;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(sdzp);
+	zilog = zfsvfs->z_log;
+
+	/*
+	 * Make sure we have the real vp for the target directory.
+	 */
+	if (VOP_REALVP(tdvp, &realvp, ct) == 0)
+		tdvp = realvp;
+
+	if (tdvp->v_vfsp != sdvp->v_vfsp || zfsctl_is_node(tdvp)) {
+		ZFS_EXIT(zfsvfs);
+		return (EXDEV);
+	}
+
+	tdzp = VTOZ(tdvp);
+	ZFS_VERIFY_ZP(tdzp);
+	if (zfsvfs->z_utf8 && u8_validate(tnm,
+	    strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+		ZFS_EXIT(zfsvfs);
+		return (EILSEQ);
+	}
+
+	if (flags & FIGNORECASE)
+		zflg |= ZCILOOK;
+
+top:
+	szp = NULL;
+	tzp = NULL;
+	zl = NULL;
+
+	/*
+	 * This is to prevent the creation of links into attribute space
+	 * by renaming a linked file into/outof an attribute directory.
+	 * See the comment in zfs_link() for why this is considered bad.
+	 */
+	if ((tdzp->z_pflags & ZFS_XATTR) != (sdzp->z_pflags & ZFS_XATTR)) {
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+	/*
+	 * Lock source and target directory entries.  To prevent deadlock,
+	 * a lock ordering must be defined.  We lock the directory with
+	 * the smallest object id first, or if it's a tie, the one with
+	 * the lexically first name.
+	 */
+	if (sdzp->z_id < tdzp->z_id) {
+		cmp = -1;
+	} else if (sdzp->z_id > tdzp->z_id) {
+		cmp = 1;
+	} else {
+		/*
+		 * First compare the two name arguments without
+		 * considering any case folding.
+		 */
+		int nofold = (zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER);
+
+		cmp = u8_strcmp(snm, tnm, 0, nofold, U8_UNICODE_LATEST, &error);
+		ASSERT(error == 0 || !zfsvfs->z_utf8);
+		if (cmp == 0) {
+			/*
+			 * POSIX: "If the old argument and the new argument
+			 * both refer to links to the same existing file,
+			 * the rename() function shall return successfully
+			 * and perform no other action."
+			 */
+			ZFS_EXIT(zfsvfs);
+			return (0);
+		}
+		/*
+		 * If the file system is case-folding, then we may
+		 * have some more checking to do.  A case-folding file
+		 * system is either supporting mixed case sensitivity
+		 * access or is completely case-insensitive.  Note
+		 * that the file system is always case preserving.
+		 *
+		 * In mixed sensitivity mode case sensitive behavior
+		 * is the default.  FIGNORECASE must be used to
+		 * explicitly request case insensitive behavior.
+		 *
+		 * If the source and target names provided differ only
+		 * by case (e.g., a request to rename 'tim' to 'Tim'),
+		 * we will treat this as a special case in the
+		 * case-insensitive mode: as long as the source name
+		 * is an exact match, we will allow this to proceed as
+		 * a name-change request.
+		 */
+		if ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE ||
+		    (zfsvfs->z_case == ZFS_CASE_MIXED &&
+		    flags & FIGNORECASE)) &&
+		    u8_strcmp(snm, tnm, 0, zfsvfs->z_norm, U8_UNICODE_LATEST,
+		    &error) == 0) {
+			/*
+			 * case preserving rename request, require exact
+			 * name matches
+			 */
+			zflg |= ZCIEXACT;
+			zflg &= ~ZCILOOK;
+		}
+	}
+
+	/*
+	 * If the source and destination directories are the same, we should
+	 * grab the z_name_lock of that directory only once.
+	 */
+	if (sdzp == tdzp) {
+		zflg |= ZHAVELOCK;
+		rw_enter(&sdzp->z_name_lock, RW_READER);
+	}
+
+	if (cmp < 0) {
+		serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp,
+		    ZEXISTS | zflg, NULL, NULL);
+		terr = zfs_dirent_lock(&tdl,
+		    tdzp, tnm, &tzp, ZRENAMING | zflg, NULL, NULL);
+	} else {
+		terr = zfs_dirent_lock(&tdl,
+		    tdzp, tnm, &tzp, zflg, NULL, NULL);
+		serr = zfs_dirent_lock(&sdl,
+		    sdzp, snm, &szp, ZEXISTS | ZRENAMING | zflg,
+		    NULL, NULL);
+	}
+
+	if (serr) {
+		/*
+		 * Source entry invalid or not there.
+		 */
+		if (!terr) {
+			zfs_dirent_unlock(tdl);
+			if (tzp)
+				VN_RELE(ZTOV(tzp));
+		}
+
+		if (sdzp == tdzp)
+			rw_exit(&sdzp->z_name_lock);
+
+		if (strcmp(snm, "..") == 0)
+			serr = EINVAL;
+		ZFS_EXIT(zfsvfs);
+		return (serr);
+	}
+	if (terr) {
+		zfs_dirent_unlock(sdl);
+		VN_RELE(ZTOV(szp));
+
+		if (sdzp == tdzp)
+			rw_exit(&sdzp->z_name_lock);
+
+		if (strcmp(tnm, "..") == 0)
+			terr = EINVAL;
+		ZFS_EXIT(zfsvfs);
+		return (terr);
+	}
+
+	/*
+	 * Must have write access at the source to remove the old entry
+	 * and write access at the target to create the new entry.
+	 * Note that if target and source are the same, this can be
+	 * done in a single check.
+	 */
+
+	if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr))
+		goto out;
+
+	if (ZTOV(szp)->v_type == VDIR) {
+		/*
+		 * Check to make sure rename is valid.
+		 * Can't do a move like this: /usr/a/b to /usr/a/b/c/d
+		 */
+		if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl))
+			goto out;
+	}
+
+	/*
+	 * Does target exist?
+	 */
+	if (tzp) {
+		/*
+		 * Source and target must be the same type.
+		 */
+		if (ZTOV(szp)->v_type == VDIR) {
+			if (ZTOV(tzp)->v_type != VDIR) {
+				error = ENOTDIR;
+				goto out;
+			}
+		} else {
+			if (ZTOV(tzp)->v_type == VDIR) {
+				error = EISDIR;
+				goto out;
+			}
+		}
+		/*
+		 * POSIX dictates that when the source and target
+		 * entries refer to the same file object, rename
+		 * must do nothing and exit without error.
+		 */
+		if (szp->z_id == tzp->z_id) {
+			error = 0;
+			goto out;
+		}
+	}
+
+	vnevent_rename_src(ZTOV(szp), sdvp, snm, ct);
+	if (tzp)
+		vnevent_rename_dest(ZTOV(tzp), tdvp, tnm, ct);
+
+	/*
+	 * notify the target directory if it is not the same
+	 * as source directory.
+	 */
+	if (tdvp != sdvp) {
+		vnevent_rename_dest_dir(tdvp, ct);
+	}
+
+	tx = dmu_tx_create(zfsvfs->z_os);
+	dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE);
+	dmu_tx_hold_sa(tx, sdzp->z_sa_hdl, B_FALSE);
+	dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm);
+	dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm);
+	if (sdzp != tdzp) {
+		dmu_tx_hold_sa(tx, tdzp->z_sa_hdl, B_FALSE);
+		zfs_sa_upgrade_txholds(tx, tdzp);
+	}
+	if (tzp) {
+		dmu_tx_hold_sa(tx, tzp->z_sa_hdl, B_FALSE);
+		zfs_sa_upgrade_txholds(tx, tzp);
+	}
+
+	zfs_sa_upgrade_txholds(tx, szp);
+	dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+	error = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (error) {
+		if (zl != NULL)
+			zfs_rename_unlock(&zl);
+		zfs_dirent_unlock(sdl);
+		zfs_dirent_unlock(tdl);
+
+		if (sdzp == tdzp)
+			rw_exit(&sdzp->z_name_lock);
+
+		VN_RELE(ZTOV(szp));
+		if (tzp)
+			VN_RELE(ZTOV(tzp));
+		if (error == ERESTART) {
+			dmu_tx_wait(tx);
+			dmu_tx_abort(tx);
+			goto top;
+		}
+		dmu_tx_abort(tx);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	if (tzp)	/* Attempt to remove the existing target */
+		error = zfs_link_destroy(tdl, tzp, tx, zflg, NULL);
+
+	if (error == 0) {
+		error = zfs_link_create(tdl, szp, tx, ZRENAMING);
+		if (error == 0) {
+			szp->z_pflags |= ZFS_AV_MODIFIED;
+
+			error = sa_update(szp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs),
+			    (void *)&szp->z_pflags, sizeof (uint64_t), tx);
+			ASSERT3U(error, ==, 0);
+
+			error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL);
+			if (error == 0) {
+				zfs_log_rename(zilog, tx, TX_RENAME |
+				    (flags & FIGNORECASE ? TX_CI : 0), sdzp,
+				    sdl->dl_name, tdzp, tdl->dl_name, szp);
+
+				/*
+				 * Update path information for the target vnode
+				 */
+				vn_renamepath(tdvp, ZTOV(szp), tnm,
+				    strlen(tnm));
+			} else {
+				/*
+				 * At this point, we have successfully created
+				 * the target name, but have failed to remove
+				 * the source name.  Since the create was done
+				 * with the ZRENAMING flag, there are
+				 * complications; for one, the link count is
+				 * wrong.  The easiest way to deal with this
+				 * is to remove the newly created target, and
+				 * return the original error.  This must
+				 * succeed; fortunately, it is very unlikely to
+				 * fail, since we just created it.
+				 */
+				VERIFY3U(zfs_link_destroy(tdl, szp, tx,
+				    ZRENAMING, NULL), ==, 0);
+			}
+		}
+	}
+
+	dmu_tx_commit(tx);
+out:
+	if (zl != NULL)
+		zfs_rename_unlock(&zl);
+
+	zfs_dirent_unlock(sdl);
+	zfs_dirent_unlock(tdl);
+
+	if (sdzp == tdzp)
+		rw_exit(&sdzp->z_name_lock);
+
+
+	VN_RELE(ZTOV(szp));
+	if (tzp)
+		VN_RELE(ZTOV(tzp));
+
+	if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+		zil_commit(zilog, 0);
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * Insert the indicated symbolic reference entry into the directory.
+ *
+ *	IN:	dvp	- Directory to contain new symbolic link.
+ *		link	- Name for new symlink entry.
+ *		vap	- Attributes of new entry.
+ *		target	- Target path of new symlink.
+ *		cr	- credentials of caller.
+ *		ct	- caller context
+ *		flags	- case flags
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	dvp - ctime|mtime updated
+ */
+/*ARGSUSED*/
+static int
+zfs_symlink(vnode_t *dvp, char *name, vattr_t *vap, char *link, cred_t *cr,
+    caller_context_t *ct, int flags)
+{
+	znode_t		*zp, *dzp = VTOZ(dvp);
+	zfs_dirlock_t	*dl;
+	dmu_tx_t	*tx;
+	zfsvfs_t	*zfsvfs = dzp->z_zfsvfs;
+	zilog_t		*zilog;
+	uint64_t	len = strlen(link);
+	int		error;
+	int		zflg = ZNEW;
+	zfs_acl_ids_t	acl_ids;
+	boolean_t	fuid_dirtied;
+	uint64_t	txtype = TX_SYMLINK;
+
+	ASSERT(vap->va_type == VLNK);
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(dzp);
+	zilog = zfsvfs->z_log;
+
+	if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
+	    NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+		ZFS_EXIT(zfsvfs);
+		return (EILSEQ);
+	}
+	if (flags & FIGNORECASE)
+		zflg |= ZCILOOK;
+
+	if (len > MAXPATHLEN) {
+		ZFS_EXIT(zfsvfs);
+		return (ENAMETOOLONG);
+	}
+
+	if ((error = zfs_acl_ids_create(dzp, 0,
+	    vap, cr, NULL, &acl_ids)) != 0) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+top:
+	/*
+	 * Attempt to lock directory; fail if entry already exists.
+	 */
+	error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, NULL, NULL);
+	if (error) {
+		zfs_acl_ids_free(&acl_ids);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) {
+		zfs_acl_ids_free(&acl_ids);
+		zfs_dirent_unlock(dl);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) {
+		zfs_acl_ids_free(&acl_ids);
+		zfs_dirent_unlock(dl);
+		ZFS_EXIT(zfsvfs);
+		return (EDQUOT);
+	}
+	tx = dmu_tx_create(zfsvfs->z_os);
+	fuid_dirtied = zfsvfs->z_fuid_dirty;
+	dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len));
+	dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
+	dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
+	    ZFS_SA_BASE_ATTR_SIZE + len);
+	dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE);
+	if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+		dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
+		    acl_ids.z_aclp->z_acl_bytes);
+	}
+	if (fuid_dirtied)
+		zfs_fuid_txhold(zfsvfs, tx);
+	error = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (error) {
+		zfs_dirent_unlock(dl);
+		if (error == ERESTART) {
+			dmu_tx_wait(tx);
+			dmu_tx_abort(tx);
+			goto top;
+		}
+		zfs_acl_ids_free(&acl_ids);
+		dmu_tx_abort(tx);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	/*
+	 * Create a new object for the symlink.
+	 * for version 4 ZPL datsets the symlink will be an SA attribute
+	 */
+	zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
+
+	if (fuid_dirtied)
+		zfs_fuid_sync(zfsvfs, tx);
+
+	mutex_enter(&zp->z_lock);
+	if (zp->z_is_sa)
+		error = sa_update(zp->z_sa_hdl, SA_ZPL_SYMLINK(zfsvfs),
+		    link, len, tx);
+	else
+		zfs_sa_symlink(zp, link, len, tx);
+	mutex_exit(&zp->z_lock);
+
+	zp->z_size = len;
+	(void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs),
+	    &zp->z_size, sizeof (zp->z_size), tx);
+	/*
+	 * Insert the new object into the directory.
+	 */
+	(void) zfs_link_create(dl, zp, tx, ZNEW);
+
+	if (flags & FIGNORECASE)
+		txtype |= TX_CI;
+	zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link);
+
+	zfs_acl_ids_free(&acl_ids);
+
+	dmu_tx_commit(tx);
+
+	zfs_dirent_unlock(dl);
+
+	VN_RELE(ZTOV(zp));
+
+	if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+		zil_commit(zilog, 0);
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * Return, in the buffer contained in the provided uio structure,
+ * the symbolic path referred to by vp.
+ *
+ *	IN:	vp	- vnode of symbolic link.
+ *		uoip	- structure to contain the link path.
+ *		cr	- credentials of caller.
+ *		ct	- caller context
+ *
+ *	OUT:	uio	- structure to contain the link path.
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	vp - atime updated
+ */
+/* ARGSUSED */
+static int
+zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr, caller_context_t *ct)
+{
+	znode_t		*zp = VTOZ(vp);
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	int		error;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	mutex_enter(&zp->z_lock);
+	if (zp->z_is_sa)
+		error = sa_lookup_uio(zp->z_sa_hdl,
+		    SA_ZPL_SYMLINK(zfsvfs), uio);
+	else
+		error = zfs_sa_readlink(zp, uio);
+	mutex_exit(&zp->z_lock);
+
+	ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * Insert a new entry into directory tdvp referencing svp.
+ *
+ *	IN:	tdvp	- Directory to contain new entry.
+ *		svp	- vnode of new entry.
+ *		name	- name of new entry.
+ *		cr	- credentials of caller.
+ *		ct	- caller context
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	tdvp - ctime|mtime updated
+ *	 svp - ctime updated
+ */
+/* ARGSUSED */
+static int
+zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr,
+    caller_context_t *ct, int flags)
+{
+	znode_t		*dzp = VTOZ(tdvp);
+	znode_t		*tzp, *szp;
+	zfsvfs_t	*zfsvfs = dzp->z_zfsvfs;
+	zilog_t		*zilog;
+	zfs_dirlock_t	*dl;
+	dmu_tx_t	*tx;
+	vnode_t		*realvp;
+	int		error;
+	int		zf = ZNEW;
+	uint64_t	parent;
+	uid_t		owner;
+
+	ASSERT(tdvp->v_type == VDIR);
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(dzp);
+	zilog = zfsvfs->z_log;
+
+	if (VOP_REALVP(svp, &realvp, ct) == 0)
+		svp = realvp;
+
+	/*
+	 * POSIX dictates that we return EPERM here.
+	 * Better choices include ENOTSUP or EISDIR.
+	 */
+	if (svp->v_type == VDIR) {
+		ZFS_EXIT(zfsvfs);
+		return (EPERM);
+	}
+
+	if (svp->v_vfsp != tdvp->v_vfsp || zfsctl_is_node(svp)) {
+		ZFS_EXIT(zfsvfs);
+		return (EXDEV);
+	}
+
+	szp = VTOZ(svp);
+	ZFS_VERIFY_ZP(szp);
+
+	/* Prevent links to .zfs/shares files */
+
+	if ((error = sa_lookup(szp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
+	    &parent, sizeof (uint64_t))) != 0) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+	if (parent == zfsvfs->z_shares_dir) {
+		ZFS_EXIT(zfsvfs);
+		return (EPERM);
+	}
+
+	if (zfsvfs->z_utf8 && u8_validate(name,
+	    strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+		ZFS_EXIT(zfsvfs);
+		return (EILSEQ);
+	}
+	if (flags & FIGNORECASE)
+		zf |= ZCILOOK;
+
+	/*
+	 * We do not support links between attributes and non-attributes
+	 * because of the potential security risk of creating links
+	 * into "normal" file space in order to circumvent restrictions
+	 * imposed in attribute space.
+	 */
+	if ((szp->z_pflags & ZFS_XATTR) != (dzp->z_pflags & ZFS_XATTR)) {
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+
+	owner = zfs_fuid_map_id(zfsvfs, szp->z_uid, cr, ZFS_OWNER);
+	if (owner != crgetuid(cr) && secpolicy_basic_link(cr) != 0) {
+		ZFS_EXIT(zfsvfs);
+		return (EPERM);
+	}
+
+	if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+top:
+	/*
+	 * Attempt to lock directory; fail if entry already exists.
+	 */
+	error = zfs_dirent_lock(&dl, dzp, name, &tzp, zf, NULL, NULL);
+	if (error) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	tx = dmu_tx_create(zfsvfs->z_os);
+	dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE);
+	dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
+	zfs_sa_upgrade_txholds(tx, szp);
+	zfs_sa_upgrade_txholds(tx, dzp);
+	error = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (error) {
+		zfs_dirent_unlock(dl);
+		if (error == ERESTART) {
+			dmu_tx_wait(tx);
+			dmu_tx_abort(tx);
+			goto top;
+		}
+		dmu_tx_abort(tx);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	error = zfs_link_create(dl, szp, tx, 0);
+
+	if (error == 0) {
+		uint64_t txtype = TX_LINK;
+		if (flags & FIGNORECASE)
+			txtype |= TX_CI;
+		zfs_log_link(zilog, tx, txtype, dzp, szp, name);
+	}
+
+	dmu_tx_commit(tx);
+
+	zfs_dirent_unlock(dl);
+
+	if (error == 0) {
+		vnevent_link(svp, ct);
+	}
+
+	if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+		zil_commit(zilog, 0);
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * zfs_null_putapage() is used when the file system has been force
+ * unmounted. It just drops the pages.
+ */
+/* ARGSUSED */
+static int
+zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp,
+		size_t *lenp, int flags, cred_t *cr)
+{
+	pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR);
+	return (0);
+}
+
+/*
+ * Push a page out to disk, klustering if possible.
+ *
+ *	IN:	vp	- file to push page to.
+ *		pp	- page to push.
+ *		flags	- additional flags.
+ *		cr	- credentials of caller.
+ *
+ *	OUT:	offp	- start of range pushed.
+ *		lenp	- len of range pushed.
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * NOTE: callers must have locked the page to be pushed.  On
+ * exit, the page (and all other pages in the kluster) must be
+ * unlocked.
+ */
+/* ARGSUSED */
+static int
+zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp,
+		size_t *lenp, int flags, cred_t *cr)
+{
+	znode_t		*zp = VTOZ(vp);
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	dmu_tx_t	*tx;
+	u_offset_t	off, koff;
+	size_t		len, klen;
+	int		err;
+
+	off = pp->p_offset;
+	len = PAGESIZE;
+	/*
+	 * If our blocksize is bigger than the page size, try to kluster
+	 * multiple pages so that we write a full block (thus avoiding
+	 * a read-modify-write).
+	 */
+	if (off < zp->z_size && zp->z_blksz > PAGESIZE) {
+		klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE);
+		koff = ISP2(klen) ? P2ALIGN(off, (u_offset_t)klen) : 0;
+		ASSERT(koff <= zp->z_size);
+		if (koff + klen > zp->z_size)
+			klen = P2ROUNDUP(zp->z_size - koff, (uint64_t)PAGESIZE);
+		pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags);
+	}
+	ASSERT3U(btop(len), ==, btopr(len));
+
+	/*
+	 * Can't push pages past end-of-file.
+	 */
+	if (off >= zp->z_size) {
+		/* ignore all pages */
+		err = 0;
+		goto out;
+	} else if (off + len > zp->z_size) {
+		int npages = btopr(zp->z_size - off);
+		page_t *trunc;
+
+		page_list_break(&pp, &trunc, npages);
+		/* ignore pages past end of file */
+		if (trunc)
+			pvn_write_done(trunc, flags);
+		len = zp->z_size - off;
+	}
+
+	if (zfs_owner_overquota(zfsvfs, zp, B_FALSE) ||
+	    zfs_owner_overquota(zfsvfs, zp, B_TRUE)) {
+		err = EDQUOT;
+		goto out;
+	}
+top:
+	tx = dmu_tx_create(zfsvfs->z_os);
+	dmu_tx_hold_write(tx, zp->z_id, off, len);
+
+	dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+	zfs_sa_upgrade_txholds(tx, zp);
+	err = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (err != 0) {
+		if (err == ERESTART) {
+			dmu_tx_wait(tx);
+			dmu_tx_abort(tx);
+			goto top;
+		}
+		dmu_tx_abort(tx);
+		goto out;
+	}
+
+	if (zp->z_blksz <= PAGESIZE) {
+		caddr_t va = zfs_map_page(pp, S_READ);
+		ASSERT3U(len, <=, PAGESIZE);
+		dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx);
+		zfs_unmap_page(pp, va);
+	} else {
+		err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx);
+	}
+
+	if (err == 0) {
+		uint64_t mtime[2], ctime[2];
+		sa_bulk_attr_t bulk[3];
+		int count = 0;
+
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
+		    &mtime, 16);
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
+		    &ctime, 16);
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+		    &zp->z_pflags, 8);
+		zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime,
+		    B_TRUE);
+		zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, off, len, 0);
+	}
+	dmu_tx_commit(tx);
+
+out:
+	pvn_write_done(pp, (err ? B_ERROR : 0) | flags);
+	if (offp)
+		*offp = off;
+	if (lenp)
+		*lenp = len;
+
+	return (err);
+}
+
+/*
+ * Copy the portion of the file indicated from pages into the file.
+ * The pages are stored in a page list attached to the files vnode.
+ *
+ *	IN:	vp	- vnode of file to push page data to.
+ *		off	- position in file to put data.
+ *		len	- amount of data to write.
+ *		flags	- flags to control the operation.
+ *		cr	- credentials of caller.
+ *		ct	- caller context.
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	vp - ctime|mtime updated
+ */
+/*ARGSUSED*/
+static int
+zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr,
+    caller_context_t *ct)
+{
+	znode_t		*zp = VTOZ(vp);
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	page_t		*pp;
+	size_t		io_len;
+	u_offset_t	io_off;
+	uint_t		blksz;
+	rl_t		*rl;
+	int		error = 0;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	/*
+	 * Align this request to the file block size in case we kluster.
+	 * XXX - this can result in pretty aggresive locking, which can
+	 * impact simultanious read/write access.  One option might be
+	 * to break up long requests (len == 0) into block-by-block
+	 * operations to get narrower locking.
+	 */
+	blksz = zp->z_blksz;
+	if (ISP2(blksz))
+		io_off = P2ALIGN_TYPED(off, blksz, u_offset_t);
+	else
+		io_off = 0;
+	if (len > 0 && ISP2(blksz))
+		io_len = P2ROUNDUP_TYPED(len + (off - io_off), blksz, size_t);
+	else
+		io_len = 0;
+
+	if (io_len == 0) {
+		/*
+		 * Search the entire vp list for pages >= io_off.
+		 */
+		rl = zfs_range_lock(zp, io_off, UINT64_MAX, RL_WRITER);
+		error = pvn_vplist_dirty(vp, io_off, zfs_putapage, flags, cr);
+		goto out;
+	}
+	rl = zfs_range_lock(zp, io_off, io_len, RL_WRITER);
+
+	if (off > zp->z_size) {
+		/* past end of file */
+		zfs_range_unlock(rl);
+		ZFS_EXIT(zfsvfs);
+		return (0);
+	}
+
+	len = MIN(io_len, P2ROUNDUP(zp->z_size, PAGESIZE) - io_off);
+
+	for (off = io_off; io_off < off + len; io_off += io_len) {
+		if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) {
+			pp = page_lookup(vp, io_off,
+			    (flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED);
+		} else {
+			pp = page_lookup_nowait(vp, io_off,
+			    (flags & B_FREE) ? SE_EXCL : SE_SHARED);
+		}
+
+		if (pp != NULL && pvn_getdirty(pp, flags)) {
+			int err;
+
+			/*
+			 * Found a dirty page to push
+			 */
+			err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr);
+			if (err)
+				error = err;
+		} else {
+			io_len = PAGESIZE;
+		}
+	}
+out:
+	zfs_range_unlock(rl);
+	if ((flags & B_ASYNC) == 0 || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+		zil_commit(zfsvfs->z_log, zp->z_id);
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*ARGSUSED*/
+void
+zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
+{
+	znode_t	*zp = VTOZ(vp);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	int error;
+
+	rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER);
+	if (zp->z_sa_hdl == NULL) {
+		/*
+		 * The fs has been unmounted, or we did a
+		 * suspend/resume and this file no longer exists.
+		 */
+		if (vn_has_cached_data(vp)) {
+			(void) pvn_vplist_dirty(vp, 0, zfs_null_putapage,
+			    B_INVAL, cr);
+		}
+
+		mutex_enter(&zp->z_lock);
+		mutex_enter(&vp->v_lock);
+		ASSERT(vp->v_count == 1);
+		vp->v_count = 0;
+		mutex_exit(&vp->v_lock);
+		mutex_exit(&zp->z_lock);
+		rw_exit(&zfsvfs->z_teardown_inactive_lock);
+		zfs_znode_free(zp);
+		return;
+	}
+
+	/*
+	 * Attempt to push any data in the page cache.  If this fails
+	 * we will get kicked out later in zfs_zinactive().
+	 */
+	if (vn_has_cached_data(vp)) {
+		(void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC,
+		    cr);
+	}
+
+	if (zp->z_atime_dirty && zp->z_unlinked == 0) {
+		dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
+
+		dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+		zfs_sa_upgrade_txholds(tx, zp);
+		error = dmu_tx_assign(tx, TXG_WAIT);
+		if (error) {
+			dmu_tx_abort(tx);
+		} else {
+			mutex_enter(&zp->z_lock);
+			(void) sa_update(zp->z_sa_hdl, SA_ZPL_ATIME(zfsvfs),
+			    (void *)&zp->z_atime, sizeof (zp->z_atime), tx);
+			zp->z_atime_dirty = 0;
+			mutex_exit(&zp->z_lock);
+			dmu_tx_commit(tx);
+		}
+	}
+
+	zfs_zinactive(zp);
+	rw_exit(&zfsvfs->z_teardown_inactive_lock);
+}
+
+/*
+ * Bounds-check the seek operation.
+ *
+ *	IN:	vp	- vnode seeking within
+ *		ooff	- old file offset
+ *		noffp	- pointer to new file offset
+ *		ct	- caller context
+ *
+ *	RETURN:	0 if success
+ *		EINVAL if new offset invalid
+ */
+/* ARGSUSED */
+static int
+zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp,
+    caller_context_t *ct)
+{
+	if (vp->v_type == VDIR)
+		return (0);
+	return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0);
+}
+
+/*
+ * Pre-filter the generic locking function to trap attempts to place
+ * a mandatory lock on a memory mapped file.
+ */
+static int
+zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset,
+    flk_callback_t *flk_cbp, cred_t *cr, caller_context_t *ct)
+{
+	znode_t *zp = VTOZ(vp);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	/*
+	 * We are following the UFS semantics with respect to mapcnt
+	 * here: If we see that the file is mapped already, then we will
+	 * return an error, but we don't worry about races between this
+	 * function and zfs_map().
+	 */
+	if (zp->z_mapcnt > 0 && MANDMODE(zp->z_mode)) {
+		ZFS_EXIT(zfsvfs);
+		return (EAGAIN);
+	}
+	ZFS_EXIT(zfsvfs);
+	return (fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct));
+}
+
+/*
+ * If we can't find a page in the cache, we will create a new page
+ * and fill it with file data.  For efficiency, we may try to fill
+ * multiple pages at once (klustering) to fill up the supplied page
+ * list.  Note that the pages to be filled are held with an exclusive
+ * lock to prevent access by other threads while they are being filled.
+ */
+static int
+zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg,
+    caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw)
+{
+	znode_t *zp = VTOZ(vp);
+	page_t *pp, *cur_pp;
+	objset_t *os = zp->z_zfsvfs->z_os;
+	u_offset_t io_off, total;
+	size_t io_len;
+	int err;
+
+	if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) {
+		/*
+		 * We only have a single page, don't bother klustering
+		 */
+		io_off = off;
+		io_len = PAGESIZE;
+		pp = page_create_va(vp, io_off, io_len,
+		    PG_EXCL | PG_WAIT, seg, addr);
+	} else {
+		/*
+		 * Try to find enough pages to fill the page list
+		 */
+		pp = pvn_read_kluster(vp, off, seg, addr, &io_off,
+		    &io_len, off, plsz, 0);
+	}
+	if (pp == NULL) {
+		/*
+		 * The page already exists, nothing to do here.
+		 */
+		*pl = NULL;
+		return (0);
+	}
+
+	/*
+	 * Fill the pages in the kluster.
+	 */
+	cur_pp = pp;
+	for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) {
+		caddr_t va;
+
+		ASSERT3U(io_off, ==, cur_pp->p_offset);
+		va = zfs_map_page(cur_pp, S_WRITE);
+		err = dmu_read(os, zp->z_id, io_off, PAGESIZE, va,
+		    DMU_READ_PREFETCH);
+		zfs_unmap_page(cur_pp, va);
+		if (err) {
+			/* On error, toss the entire kluster */
+			pvn_read_done(pp, B_ERROR);
+			/* convert checksum errors into IO errors */
+			if (err == ECKSUM)
+				err = EIO;
+			return (err);
+		}
+		cur_pp = cur_pp->p_next;
+	}
+
+	/*
+	 * Fill in the page list array from the kluster starting
+	 * from the desired offset `off'.
+	 * NOTE: the page list will always be null terminated.
+	 */
+	pvn_plist_init(pp, pl, plsz, off, io_len, rw);
+	ASSERT(pl == NULL || (*pl)->p_offset == off);
+
+	return (0);
+}
+
+/*
+ * Return pointers to the pages for the file region [off, off + len]
+ * in the pl array.  If plsz is greater than len, this function may
+ * also return page pointers from after the specified region
+ * (i.e. the region [off, off + plsz]).  These additional pages are
+ * only returned if they are already in the cache, or were created as
+ * part of a klustered read.
+ *
+ *	IN:	vp	- vnode of file to get data from.
+ *		off	- position in file to get data from.
+ *		len	- amount of data to retrieve.
+ *		plsz	- length of provided page list.
+ *		seg	- segment to obtain pages for.
+ *		addr	- virtual address of fault.
+ *		rw	- mode of created pages.
+ *		cr	- credentials of caller.
+ *		ct	- caller context.
+ *
+ *	OUT:	protp	- protection mode of created pages.
+ *		pl	- list of pages created.
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	vp - atime updated
+ */
+/* ARGSUSED */
+static int
+zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp,
+	page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr,
+	enum seg_rw rw, cred_t *cr, caller_context_t *ct)
+{
+	znode_t		*zp = VTOZ(vp);
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	page_t		**pl0 = pl;
+	int		err = 0;
+
+	/* we do our own caching, faultahead is unnecessary */
+	if (pl == NULL)
+		return (0);
+	else if (len > plsz)
+		len = plsz;
+	else
+		len = P2ROUNDUP(len, PAGESIZE);
+	ASSERT(plsz >= len);
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	if (protp)
+		*protp = PROT_ALL;
+
+	/*
+	 * Loop through the requested range [off, off + len) looking
+	 * for pages.  If we don't find a page, we will need to create
+	 * a new page and fill it with data from the file.
+	 */
+	while (len > 0) {
+		if (*pl = page_lookup(vp, off, SE_SHARED))
+			*(pl+1) = NULL;
+		else if (err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw))
+			goto out;
+		while (*pl) {
+			ASSERT3U((*pl)->p_offset, ==, off);
+			off += PAGESIZE;
+			addr += PAGESIZE;
+			if (len > 0) {
+				ASSERT3U(len, >=, PAGESIZE);
+				len -= PAGESIZE;
+			}
+			ASSERT3U(plsz, >=, PAGESIZE);
+			plsz -= PAGESIZE;
+			pl++;
+		}
+	}
+
+	/*
+	 * Fill out the page array with any pages already in the cache.
+	 */
+	while (plsz > 0 &&
+	    (*pl++ = page_lookup_nowait(vp, off, SE_SHARED))) {
+			off += PAGESIZE;
+			plsz -= PAGESIZE;
+	}
+out:
+	if (err) {
+		/*
+		 * Release any pages we have previously locked.
+		 */
+		while (pl > pl0)
+			page_unlock(*--pl);
+	} else {
+		ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
+	}
+
+	*pl = NULL;
+
+	ZFS_EXIT(zfsvfs);
+	return (err);
+}
+
+/*
+ * Request a memory map for a section of a file.  This code interacts
+ * with common code and the VM system as follows:
+ *
+ *	common code calls mmap(), which ends up in smmap_common()
+ *
+ *	this calls VOP_MAP(), which takes you into (say) zfs
+ *
+ *	zfs_map() calls as_map(), passing segvn_create() as the callback
+ *
+ *	segvn_create() creates the new segment and calls VOP_ADDMAP()
+ *
+ *	zfs_addmap() updates z_mapcnt
+ */
+/*ARGSUSED*/
+static int
+zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp,
+    size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr,
+    caller_context_t *ct)
+{
+	znode_t *zp = VTOZ(vp);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	segvn_crargs_t	vn_a;
+	int		error;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	if ((prot & PROT_WRITE) && (zp->z_pflags &
+	    (ZFS_IMMUTABLE | ZFS_READONLY | ZFS_APPENDONLY))) {
+		ZFS_EXIT(zfsvfs);
+		return (EPERM);
+	}
+
+	if ((prot & (PROT_READ | PROT_EXEC)) &&
+	    (zp->z_pflags & ZFS_AV_QUARANTINED)) {
+		ZFS_EXIT(zfsvfs);
+		return (EACCES);
+	}
+
+	if (vp->v_flag & VNOMAP) {
+		ZFS_EXIT(zfsvfs);
+		return (ENOSYS);
+	}
+
+	if (off < 0 || len > MAXOFFSET_T - off) {
+		ZFS_EXIT(zfsvfs);
+		return (ENXIO);
+	}
+
+	if (vp->v_type != VREG) {
+		ZFS_EXIT(zfsvfs);
+		return (ENODEV);
+	}
+
+	/*
+	 * If file is locked, disallow mapping.
+	 */
+	if (MANDMODE(zp->z_mode) && vn_has_flocks(vp)) {
+		ZFS_EXIT(zfsvfs);
+		return (EAGAIN);
+	}
+
+	as_rangelock(as);
+	error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags);
+	if (error != 0) {
+		as_rangeunlock(as);
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	vn_a.vp = vp;
+	vn_a.offset = (u_offset_t)off;
+	vn_a.type = flags & MAP_TYPE;
+	vn_a.prot = prot;
+	vn_a.maxprot = maxprot;
+	vn_a.cred = cr;
+	vn_a.amp = NULL;
+	vn_a.flags = flags & ~MAP_TYPE;
+	vn_a.szc = 0;
+	vn_a.lgrp_mem_policy_flags = 0;
+
+	error = as_map(as, *addrp, len, segvn_create, &vn_a);
+
+	as_rangeunlock(as);
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/* ARGSUSED */
+static int
+zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr,
+    size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr,
+    caller_context_t *ct)
+{
+	uint64_t pages = btopr(len);
+
+	atomic_add_64(&VTOZ(vp)->z_mapcnt, pages);
+	return (0);
+}
+
+/*
+ * The reason we push dirty pages as part of zfs_delmap() is so that we get a
+ * more accurate mtime for the associated file.  Since we don't have a way of
+ * detecting when the data was actually modified, we have to resort to
+ * heuristics.  If an explicit msync() is done, then we mark the mtime when the
+ * last page is pushed.  The problem occurs when the msync() call is omitted,
+ * which by far the most common case:
+ *
+ * 	open()
+ * 	mmap()
+ * 	<modify memory>
+ * 	munmap()
+ * 	close()
+ * 	<time lapse>
+ * 	putpage() via fsflush
+ *
+ * If we wait until fsflush to come along, we can have a modification time that
+ * is some arbitrary point in the future.  In order to prevent this in the
+ * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is
+ * torn down.
+ */
+/* ARGSUSED */
+static int
+zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr,
+    size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr,
+    caller_context_t *ct)
+{
+	uint64_t pages = btopr(len);
+
+	ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages);
+	atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages);
+
+	if ((flags & MAP_SHARED) && (prot & PROT_WRITE) &&
+	    vn_has_cached_data(vp))
+		(void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr, ct);
+
+	return (0);
+}
+
+/*
+ * Free or allocate space in a file.  Currently, this function only
+ * supports the `F_FREESP' command.  However, this command is somewhat
+ * misnamed, as its functionality includes the ability to allocate as
+ * well as free space.
+ *
+ *	IN:	vp	- vnode of file to free data in.
+ *		cmd	- action to take (only F_FREESP supported).
+ *		bfp	- section of file to free/alloc.
+ *		flag	- current file open mode flags.
+ *		offset	- current file offset.
+ *		cr	- credentials of caller [UNUSED].
+ *		ct	- caller context.
+ *
+ *	RETURN:	0 if success
+ *		error code if failure
+ *
+ * Timestamps:
+ *	vp - ctime|mtime updated
+ */
+/* ARGSUSED */
+static int
+zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag,
+    offset_t offset, cred_t *cr, caller_context_t *ct)
+{
+	znode_t		*zp = VTOZ(vp);
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	uint64_t	off, len;
+	int		error;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	if (cmd != F_FREESP) {
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+	if (error = convoff(vp, bfp, 0, offset)) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	if (bfp->l_len < 0) {
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+	off = bfp->l_start;
+	len = bfp->l_len; /* 0 means from off to end of file */
+
+	error = zfs_freesp(zp, off, len, flag, TRUE);
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*ARGSUSED*/
+static int
+zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct)
+{
+	znode_t		*zp = VTOZ(vp);
+	zfsvfs_t	*zfsvfs = zp->z_zfsvfs;
+	uint32_t	gen;
+	uint64_t	gen64;
+	uint64_t	object = zp->z_id;
+	zfid_short_t	*zfid;
+	int		size, i, error;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs),
+	    &gen64, sizeof (uint64_t))) != 0) {
+		ZFS_EXIT(zfsvfs);
+		return (error);
+	}
+
+	gen = (uint32_t)gen64;
+
+	size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN;
+	if (fidp->fid_len < size) {
+		fidp->fid_len = size;
+		ZFS_EXIT(zfsvfs);
+		return (ENOSPC);
+	}
+
+	zfid = (zfid_short_t *)fidp;
+
+	zfid->zf_len = size;
+
+	for (i = 0; i < sizeof (zfid->zf_object); i++)
+		zfid->zf_object[i] = (uint8_t)(object >> (8 * i));
+
+	/* Must have a non-zero generation number to distinguish from .zfs */
+	if (gen == 0)
+		gen = 1;
+	for (i = 0; i < sizeof (zfid->zf_gen); i++)
+		zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i));
+
+	if (size == LONG_FID_LEN) {
+		uint64_t	objsetid = dmu_objset_id(zfsvfs->z_os);
+		zfid_long_t	*zlfid;
+
+		zlfid = (zfid_long_t *)fidp;
+
+		for (i = 0; i < sizeof (zlfid->zf_setid); i++)
+			zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i));
+
+		/* XXX - this should be the generation number for the objset */
+		for (i = 0; i < sizeof (zlfid->zf_setgen); i++)
+			zlfid->zf_setgen[i] = 0;
+	}
+
+	ZFS_EXIT(zfsvfs);
+	return (0);
+}
+
+static int
+zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
+    caller_context_t *ct)
+{
+	znode_t		*zp, *xzp;
+	zfsvfs_t	*zfsvfs;
+	zfs_dirlock_t	*dl;
+	int		error;
+
+	switch (cmd) {
+	case _PC_LINK_MAX:
+		*valp = ULONG_MAX;
+		return (0);
+
+	case _PC_FILESIZEBITS:
+		*valp = 64;
+		return (0);
+
+	case _PC_XATTR_EXISTS:
+		zp = VTOZ(vp);
+		zfsvfs = zp->z_zfsvfs;
+		ZFS_ENTER(zfsvfs);
+		ZFS_VERIFY_ZP(zp);
+		*valp = 0;
+		error = zfs_dirent_lock(&dl, zp, "", &xzp,
+		    ZXATTR | ZEXISTS | ZSHARED, NULL, NULL);
+		if (error == 0) {
+			zfs_dirent_unlock(dl);
+			if (!zfs_dirempty(xzp))
+				*valp = 1;
+			VN_RELE(ZTOV(xzp));
+		} else if (error == ENOENT) {
+			/*
+			 * If there aren't extended attributes, it's the
+			 * same as having zero of them.
+			 */
+			error = 0;
+		}
+		ZFS_EXIT(zfsvfs);
+		return (error);
+
+	case _PC_SATTR_ENABLED:
+	case _PC_SATTR_EXISTS:
+		*valp = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) &&
+		    (vp->v_type == VREG || vp->v_type == VDIR);
+		return (0);
+
+	case _PC_ACCESS_FILTERING:
+		*valp = vfs_has_feature(vp->v_vfsp, VFSFT_ACCESS_FILTER) &&
+		    vp->v_type == VDIR;
+		return (0);
+
+	case _PC_ACL_ENABLED:
+		*valp = _ACL_ACE_ENABLED;
+		return (0);
+
+	case _PC_MIN_HOLE_SIZE:
+		*valp = (ulong_t)SPA_MINBLOCKSIZE;
+		return (0);
+
+	case _PC_TIMESTAMP_RESOLUTION:
+		/* nanosecond timestamp resolution */
+		*valp = 1L;
+		return (0);
+
+	default:
+		return (fs_pathconf(vp, cmd, valp, cr, ct));
+	}
+}
+
+/*ARGSUSED*/
+static int
+zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr,
+    caller_context_t *ct)
+{
+	znode_t *zp = VTOZ(vp);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	int error;
+	boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+	error = zfs_getacl(zp, vsecp, skipaclchk, cr);
+	ZFS_EXIT(zfsvfs);
+
+	return (error);
+}
+
+/*ARGSUSED*/
+static int
+zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr,
+    caller_context_t *ct)
+{
+	znode_t *zp = VTOZ(vp);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	int error;
+	boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
+	zilog_t	*zilog = zfsvfs->z_log;
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+
+	error = zfs_setacl(zp, vsecp, skipaclchk, cr);
+
+	if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+		zil_commit(zilog, 0);
+
+	ZFS_EXIT(zfsvfs);
+	return (error);
+}
+
+/*
+ * Tunable, both must be a power of 2.
+ *
+ * zcr_blksz_min: the smallest read we may consider to loan out an arcbuf
+ * zcr_blksz_max: if set to less than the file block size, allow loaning out of
+ *                an arcbuf for a partial block read
+ */
+int zcr_blksz_min = (1 << 10);	/* 1K */
+int zcr_blksz_max = (1 << 17);	/* 128K */
+
+/*ARGSUSED*/
+static int
+zfs_reqzcbuf(vnode_t *vp, enum uio_rw ioflag, xuio_t *xuio, cred_t *cr,
+    caller_context_t *ct)
+{
+	znode_t	*zp = VTOZ(vp);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	int max_blksz = zfsvfs->z_max_blksz;
+	uio_t *uio = &xuio->xu_uio;
+	ssize_t size = uio->uio_resid;
+	offset_t offset = uio->uio_loffset;
+	int blksz;
+	int fullblk, i;
+	arc_buf_t *abuf;
+	ssize_t maxsize;
+	int preamble, postamble;
+
+	if (xuio->xu_type != UIOTYPE_ZEROCOPY)
+		return (EINVAL);
+
+	ZFS_ENTER(zfsvfs);
+	ZFS_VERIFY_ZP(zp);
+	switch (ioflag) {
+	case UIO_WRITE:
+		/*
+		 * Loan out an arc_buf for write if write size is bigger than
+		 * max_blksz, and the file's block size is also max_blksz.
+		 */
+		blksz = max_blksz;
+		if (size < blksz || zp->z_blksz != blksz) {
+			ZFS_EXIT(zfsvfs);
+			return (EINVAL);
+		}
+		/*
+		 * Caller requests buffers for write before knowing where the
+		 * write offset might be (e.g. NFS TCP write).
+		 */
+		if (offset == -1) {
+			preamble = 0;
+		} else {
+			preamble = P2PHASE(offset, blksz);
+			if (preamble) {
+				preamble = blksz - preamble;
+				size -= preamble;
+			}
+		}
+
+		postamble = P2PHASE(size, blksz);
+		size -= postamble;
+
+		fullblk = size / blksz;
+		(void) dmu_xuio_init(xuio,
+		    (preamble != 0) + fullblk + (postamble != 0));
+		DTRACE_PROBE3(zfs_reqzcbuf_align, int, preamble,
+		    int, postamble, int,
+		    (preamble != 0) + fullblk + (postamble != 0));
+
+		/*
+		 * Have to fix iov base/len for partial buffers.  They
+		 * currently represent full arc_buf's.
+		 */
+		if (preamble) {
+			/* data begins in the middle of the arc_buf */
+			abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
+			    blksz);
+			ASSERT(abuf);
+			(void) dmu_xuio_add(xuio, abuf,
+			    blksz - preamble, preamble);
+		}
+
+		for (i = 0; i < fullblk; i++) {
+			abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
+			    blksz);
+			ASSERT(abuf);
+			(void) dmu_xuio_add(xuio, abuf, 0, blksz);
+		}
+
+		if (postamble) {
+			/* data ends in the middle of the arc_buf */
+			abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
+			    blksz);
+			ASSERT(abuf);
+			(void) dmu_xuio_add(xuio, abuf, 0, postamble);
+		}
+		break;
+	case UIO_READ:
+		/*
+		 * Loan out an arc_buf for read if the read size is larger than
+		 * the current file block size.  Block alignment is not
+		 * considered.  Partial arc_buf will be loaned out for read.
+		 */
+		blksz = zp->z_blksz;
+		if (blksz < zcr_blksz_min)
+			blksz = zcr_blksz_min;
+		if (blksz > zcr_blksz_max)
+			blksz = zcr_blksz_max;
+		/* avoid potential complexity of dealing with it */
+		if (blksz > max_blksz) {
+			ZFS_EXIT(zfsvfs);
+			return (EINVAL);
+		}
+
+		maxsize = zp->z_size - uio->uio_loffset;
+		if (size > maxsize)
+			size = maxsize;
+
+		if (size < blksz || vn_has_cached_data(vp)) {
+			ZFS_EXIT(zfsvfs);
+			return (EINVAL);
+		}
+		break;
+	default:
+		ZFS_EXIT(zfsvfs);
+		return (EINVAL);
+	}
+
+	uio->uio_extflg = UIO_XUIO;
+	XUIO_XUZC_RW(xuio) = ioflag;
+	ZFS_EXIT(zfsvfs);
+	return (0);
+}
+
+/*ARGSUSED*/
+static int
+zfs_retzcbuf(vnode_t *vp, xuio_t *xuio, cred_t *cr, caller_context_t *ct)
+{
+	int i;
+	arc_buf_t *abuf;
+	int ioflag = XUIO_XUZC_RW(xuio);
+
+	ASSERT(xuio->xu_type == UIOTYPE_ZEROCOPY);
+
+	i = dmu_xuio_cnt(xuio);
+	while (i-- > 0) {
+		abuf = dmu_xuio_arcbuf(xuio, i);
+		/*
+		 * if abuf == NULL, it must be a write buffer
+		 * that has been returned in zfs_write().
+		 */
+		if (abuf)
+			dmu_return_arcbuf(abuf);
+		ASSERT(abuf || ioflag == UIO_WRITE);
+	}
+
+	dmu_xuio_fini(xuio);
+	return (0);
+}
+
+/*
+ * Predeclare these here so that the compiler assumes that
+ * this is an "old style" function declaration that does
+ * not include arguments => we won't get type mismatch errors
+ * in the initializations that follow.
+ */
+static int zfs_inval();
+static int zfs_isdir();
+
+static int
+zfs_inval()
+{
+	return (EINVAL);
+}
+
+static int
+zfs_isdir()
+{
+	return (EISDIR);
+}
+/*
+ * Directory vnode operations template
+ */
+vnodeops_t *zfs_dvnodeops;
+const fs_operation_def_t zfs_dvnodeops_template[] = {
+	VOPNAME_OPEN,		{ .vop_open = zfs_open },
+	VOPNAME_CLOSE,		{ .vop_close = zfs_close },
+	VOPNAME_READ,		{ .error = zfs_isdir },
+	VOPNAME_WRITE,		{ .error = zfs_isdir },
+	VOPNAME_IOCTL,		{ .vop_ioctl = zfs_ioctl },
+	VOPNAME_GETATTR,	{ .vop_getattr = zfs_getattr },
+	VOPNAME_SETATTR,	{ .vop_setattr = zfs_setattr },
+	VOPNAME_ACCESS,		{ .vop_access = zfs_access },
+	VOPNAME_LOOKUP,		{ .vop_lookup = zfs_lookup },
+	VOPNAME_CREATE,		{ .vop_create = zfs_create },
+	VOPNAME_REMOVE,		{ .vop_remove = zfs_remove },
+	VOPNAME_LINK,		{ .vop_link = zfs_link },
+	VOPNAME_RENAME,		{ .vop_rename = zfs_rename },
+	VOPNAME_MKDIR,		{ .vop_mkdir = zfs_mkdir },
+	VOPNAME_RMDIR,		{ .vop_rmdir = zfs_rmdir },
+	VOPNAME_READDIR,	{ .vop_readdir = zfs_readdir },
+	VOPNAME_SYMLINK,	{ .vop_symlink = zfs_symlink },
+	VOPNAME_FSYNC,		{ .vop_fsync = zfs_fsync },
+	VOPNAME_INACTIVE,	{ .vop_inactive = zfs_inactive },
+	VOPNAME_FID,		{ .vop_fid = zfs_fid },
+	VOPNAME_SEEK,		{ .vop_seek = zfs_seek },
+	VOPNAME_PATHCONF,	{ .vop_pathconf = zfs_pathconf },
+	VOPNAME_GETSECATTR,	{ .vop_getsecattr = zfs_getsecattr },
+	VOPNAME_SETSECATTR,	{ .vop_setsecattr = zfs_setsecattr },
+	VOPNAME_VNEVENT, 	{ .vop_vnevent = fs_vnevent_support },
+	NULL,			NULL
+};
+
+/*
+ * Regular file vnode operations template
+ */
+vnodeops_t *zfs_fvnodeops;
+const fs_operation_def_t zfs_fvnodeops_template[] = {
+	VOPNAME_OPEN,		{ .vop_open = zfs_open },
+	VOPNAME_CLOSE,		{ .vop_close = zfs_close },
+	VOPNAME_READ,		{ .vop_read = zfs_read },
+	VOPNAME_WRITE,		{ .vop_write = zfs_write },
+	VOPNAME_IOCTL,		{ .vop_ioctl = zfs_ioctl },
+	VOPNAME_GETATTR,	{ .vop_getattr = zfs_getattr },
+	VOPNAME_SETATTR,	{ .vop_setattr = zfs_setattr },
+	VOPNAME_ACCESS,		{ .vop_access = zfs_access },
+	VOPNAME_LOOKUP,		{ .vop_lookup = zfs_lookup },
+	VOPNAME_RENAME,		{ .vop_rename = zfs_rename },
+	VOPNAME_FSYNC,		{ .vop_fsync = zfs_fsync },
+	VOPNAME_INACTIVE,	{ .vop_inactive = zfs_inactive },
+	VOPNAME_FID,		{ .vop_fid = zfs_fid },
+	VOPNAME_SEEK,		{ .vop_seek = zfs_seek },
+	VOPNAME_FRLOCK,		{ .vop_frlock = zfs_frlock },
+	VOPNAME_SPACE,		{ .vop_space = zfs_space },
+	VOPNAME_GETPAGE,	{ .vop_getpage = zfs_getpage },
+	VOPNAME_PUTPAGE,	{ .vop_putpage = zfs_putpage },
+	VOPNAME_MAP,		{ .vop_map = zfs_map },
+	VOPNAME_ADDMAP,		{ .vop_addmap = zfs_addmap },
+	VOPNAME_DELMAP,		{ .vop_delmap = zfs_delmap },
+	VOPNAME_PATHCONF,	{ .vop_pathconf = zfs_pathconf },
+	VOPNAME_GETSECATTR,	{ .vop_getsecattr = zfs_getsecattr },
+	VOPNAME_SETSECATTR,	{ .vop_setsecattr = zfs_setsecattr },
+	VOPNAME_VNEVENT,	{ .vop_vnevent = fs_vnevent_support },
+	VOPNAME_REQZCBUF, 	{ .vop_reqzcbuf = zfs_reqzcbuf },
+	VOPNAME_RETZCBUF, 	{ .vop_retzcbuf = zfs_retzcbuf },
+	NULL,			NULL
+};
+
+/*
+ * Symbolic link vnode operations template
+ */
+vnodeops_t *zfs_symvnodeops;
+const fs_operation_def_t zfs_symvnodeops_template[] = {
+	VOPNAME_GETATTR,	{ .vop_getattr = zfs_getattr },
+	VOPNAME_SETATTR,	{ .vop_setattr = zfs_setattr },
+	VOPNAME_ACCESS,		{ .vop_access = zfs_access },
+	VOPNAME_RENAME,		{ .vop_rename = zfs_rename },
+	VOPNAME_READLINK,	{ .vop_readlink = zfs_readlink },
+	VOPNAME_INACTIVE,	{ .vop_inactive = zfs_inactive },
+	VOPNAME_FID,		{ .vop_fid = zfs_fid },
+	VOPNAME_PATHCONF,	{ .vop_pathconf = zfs_pathconf },
+	VOPNAME_VNEVENT,	{ .vop_vnevent = fs_vnevent_support },
+	NULL,			NULL
+};
+
+/*
+ * special share hidden files vnode operations template
+ */
+vnodeops_t *zfs_sharevnodeops;
+const fs_operation_def_t zfs_sharevnodeops_template[] = {
+	VOPNAME_GETATTR,	{ .vop_getattr = zfs_getattr },
+	VOPNAME_ACCESS,		{ .vop_access = zfs_access },
+	VOPNAME_INACTIVE,	{ .vop_inactive = zfs_inactive },
+	VOPNAME_FID,		{ .vop_fid = zfs_fid },
+	VOPNAME_PATHCONF,	{ .vop_pathconf = zfs_pathconf },
+	VOPNAME_GETSECATTR,	{ .vop_getsecattr = zfs_getsecattr },
+	VOPNAME_SETSECATTR,	{ .vop_setsecattr = zfs_setsecattr },
+	VOPNAME_VNEVENT,	{ .vop_vnevent = fs_vnevent_support },
+	NULL,			NULL
+};
+
+/*
+ * Extended attribute directory vnode operations template
+ *	This template is identical to the directory vnodes
+ *	operation template except for restricted operations:
+ *		VOP_MKDIR()
+ *		VOP_SYMLINK()
+ * Note that there are other restrictions embedded in:
+ *	zfs_create()	- restrict type to VREG
+ *	zfs_link()	- no links into/out of attribute space
+ *	zfs_rename()	- no moves into/out of attribute space
+ */
+vnodeops_t *zfs_xdvnodeops;
+const fs_operation_def_t zfs_xdvnodeops_template[] = {
+	VOPNAME_OPEN,		{ .vop_open = zfs_open },
+	VOPNAME_CLOSE,		{ .vop_close = zfs_close },
+	VOPNAME_IOCTL,		{ .vop_ioctl = zfs_ioctl },
+	VOPNAME_GETATTR,	{ .vop_getattr = zfs_getattr },
+	VOPNAME_SETATTR,	{ .vop_setattr = zfs_setattr },
+	VOPNAME_ACCESS,		{ .vop_access = zfs_access },
+	VOPNAME_LOOKUP,		{ .vop_lookup = zfs_lookup },
+	VOPNAME_CREATE,		{ .vop_create = zfs_create },
+	VOPNAME_REMOVE,		{ .vop_remove = zfs_remove },
+	VOPNAME_LINK,		{ .vop_link = zfs_link },
+	VOPNAME_RENAME,		{ .vop_rename = zfs_rename },
+	VOPNAME_MKDIR,		{ .error = zfs_inval },
+	VOPNAME_RMDIR,		{ .vop_rmdir = zfs_rmdir },
+	VOPNAME_READDIR,	{ .vop_readdir = zfs_readdir },
+	VOPNAME_SYMLINK,	{ .error = zfs_inval },
+	VOPNAME_FSYNC,		{ .vop_fsync = zfs_fsync },
+	VOPNAME_INACTIVE,	{ .vop_inactive = zfs_inactive },
+	VOPNAME_FID,		{ .vop_fid = zfs_fid },
+	VOPNAME_SEEK,		{ .vop_seek = zfs_seek },
+	VOPNAME_PATHCONF,	{ .vop_pathconf = zfs_pathconf },
+	VOPNAME_GETSECATTR,	{ .vop_getsecattr = zfs_getsecattr },
+	VOPNAME_SETSECATTR,	{ .vop_setsecattr = zfs_setsecattr },
+	VOPNAME_VNEVENT,	{ .vop_vnevent = fs_vnevent_support },
+	NULL,			NULL
+};
+
+/*
+ * Error vnode operations template
+ */
+vnodeops_t *zfs_evnodeops;
+const fs_operation_def_t zfs_evnodeops_template[] = {
+	VOPNAME_INACTIVE,	{ .vop_inactive = zfs_inactive },
+	VOPNAME_PATHCONF,	{ .vop_pathconf = zfs_pathconf },
+	NULL,			NULL
+};
diff --git a/uts/common/fs/zfs/zfs_znode.c b/uts/common/fs/zfs/zfs_znode.c
new file mode 100644
index 000000000000..12639a44a9c4
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_znode.c
@@ -0,0 +1,2121 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2007 Jeremy Teo */
+
+#ifdef _KERNEL
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/resource.h>
+#include <sys/mntent.h>
+#include <sys/mkdev.h>
+#include <sys/u8_textprep.h>
+#include <sys/dsl_dataset.h>
+#include <sys/vfs.h>
+#include <sys/vfs_opreg.h>
+#include <sys/vnode.h>
+#include <sys/file.h>
+#include <sys/kmem.h>
+#include <sys/errno.h>
+#include <sys/unistd.h>
+#include <sys/mode.h>
+#include <sys/atomic.h>
+#include <vm/pvn.h>
+#include "fs/fs_subr.h"
+#include <sys/zfs_dir.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/zfs_rlock.h>
+#include <sys/zfs_fuid.h>
+#include <sys/dnode.h>
+#include <sys/fs/zfs.h>
+#include <sys/kidmap.h>
+#endif /* _KERNEL */
+
+#include <sys/dmu.h>
+#include <sys/refcount.h>
+#include <sys/stat.h>
+#include <sys/zap.h>
+#include <sys/zfs_znode.h>
+#include <sys/sa.h>
+#include <sys/zfs_sa.h>
+#include <sys/zfs_stat.h>
+
+#include "zfs_prop.h"
+#include "zfs_comutil.h"
+
+/*
+ * Define ZNODE_STATS to turn on statistic gathering. By default, it is only
+ * turned on when DEBUG is also defined.
+ */
+#ifdef	DEBUG
+#define	ZNODE_STATS
+#endif	/* DEBUG */
+
+#ifdef	ZNODE_STATS
+#define	ZNODE_STAT_ADD(stat)			((stat)++)
+#else
+#define	ZNODE_STAT_ADD(stat)			/* nothing */
+#endif	/* ZNODE_STATS */
+
+/*
+ * Functions needed for userland (ie: libzpool) are not put under
+ * #ifdef_KERNEL; the rest of the functions have dependencies
+ * (such as VFS logic) that will not compile easily in userland.
+ */
+#ifdef _KERNEL
+/*
+ * Needed to close a small window in zfs_znode_move() that allows the zfsvfs to
+ * be freed before it can be safely accessed.
+ */
+krwlock_t zfsvfs_lock;
+
+static kmem_cache_t *znode_cache = NULL;
+
+/*ARGSUSED*/
+static void
+znode_evict_error(dmu_buf_t *dbuf, void *user_ptr)
+{
+	/*
+	 * We should never drop all dbuf refs without first clearing
+	 * the eviction callback.
+	 */
+	panic("evicting znode %p\n", user_ptr);
+}
+
+/*ARGSUSED*/
+static int
+zfs_znode_cache_constructor(void *buf, void *arg, int kmflags)
+{
+	znode_t *zp = buf;
+
+	ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
+
+	zp->z_vnode = vn_alloc(kmflags);
+	if (zp->z_vnode == NULL) {
+		return (-1);
+	}
+	ZTOV(zp)->v_data = zp;
+
+	list_link_init(&zp->z_link_node);
+
+	mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL);
+	rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL);
+	rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL);
+	mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL);
+	avl_create(&zp->z_range_avl, zfs_range_compare,
+	    sizeof (rl_t), offsetof(rl_t, r_node));
+
+	zp->z_dirlocks = NULL;
+	zp->z_acl_cached = NULL;
+	zp->z_moved = 0;
+	return (0);
+}
+
+/*ARGSUSED*/
+static void
+zfs_znode_cache_destructor(void *buf, void *arg)
+{
+	znode_t *zp = buf;
+
+	ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
+	ASSERT(ZTOV(zp)->v_data == zp);
+	vn_free(ZTOV(zp));
+	ASSERT(!list_link_active(&zp->z_link_node));
+	mutex_destroy(&zp->z_lock);
+	rw_destroy(&zp->z_parent_lock);
+	rw_destroy(&zp->z_name_lock);
+	mutex_destroy(&zp->z_acl_lock);
+	avl_destroy(&zp->z_range_avl);
+	mutex_destroy(&zp->z_range_lock);
+
+	ASSERT(zp->z_dirlocks == NULL);
+	ASSERT(zp->z_acl_cached == NULL);
+}
+
+#ifdef	ZNODE_STATS
+static struct {
+	uint64_t zms_zfsvfs_invalid;
+	uint64_t zms_zfsvfs_recheck1;
+	uint64_t zms_zfsvfs_unmounted;
+	uint64_t zms_zfsvfs_recheck2;
+	uint64_t zms_obj_held;
+	uint64_t zms_vnode_locked;
+	uint64_t zms_not_only_dnlc;
+} znode_move_stats;
+#endif	/* ZNODE_STATS */
+
+static void
+zfs_znode_move_impl(znode_t *ozp, znode_t *nzp)
+{
+	vnode_t *vp;
+
+	/* Copy fields. */
+	nzp->z_zfsvfs = ozp->z_zfsvfs;
+
+	/* Swap vnodes. */
+	vp = nzp->z_vnode;
+	nzp->z_vnode = ozp->z_vnode;
+	ozp->z_vnode = vp; /* let destructor free the overwritten vnode */
+	ZTOV(ozp)->v_data = ozp;
+	ZTOV(nzp)->v_data = nzp;
+
+	nzp->z_id = ozp->z_id;
+	ASSERT(ozp->z_dirlocks == NULL); /* znode not in use */
+	ASSERT(avl_numnodes(&ozp->z_range_avl) == 0);
+	nzp->z_unlinked = ozp->z_unlinked;
+	nzp->z_atime_dirty = ozp->z_atime_dirty;
+	nzp->z_zn_prefetch = ozp->z_zn_prefetch;
+	nzp->z_blksz = ozp->z_blksz;
+	nzp->z_seq = ozp->z_seq;
+	nzp->z_mapcnt = ozp->z_mapcnt;
+	nzp->z_gen = ozp->z_gen;
+	nzp->z_sync_cnt = ozp->z_sync_cnt;
+	nzp->z_is_sa = ozp->z_is_sa;
+	nzp->z_sa_hdl = ozp->z_sa_hdl;
+	bcopy(ozp->z_atime, nzp->z_atime, sizeof (uint64_t) * 2);
+	nzp->z_links = ozp->z_links;
+	nzp->z_size = ozp->z_size;
+	nzp->z_pflags = ozp->z_pflags;
+	nzp->z_uid = ozp->z_uid;
+	nzp->z_gid = ozp->z_gid;
+	nzp->z_mode = ozp->z_mode;
+
+	/*
+	 * Since this is just an idle znode and kmem is already dealing with
+	 * memory pressure, release any cached ACL.
+	 */
+	if (ozp->z_acl_cached) {
+		zfs_acl_free(ozp->z_acl_cached);
+		ozp->z_acl_cached = NULL;
+	}
+
+	sa_set_userp(nzp->z_sa_hdl, nzp);
+
+	/*
+	 * Invalidate the original znode by clearing fields that provide a
+	 * pointer back to the znode. Set the low bit of the vfs pointer to
+	 * ensure that zfs_znode_move() recognizes the znode as invalid in any
+	 * subsequent callback.
+	 */
+	ozp->z_sa_hdl = NULL;
+	POINTER_INVALIDATE(&ozp->z_zfsvfs);
+
+	/*
+	 * Mark the znode.
+	 */
+	nzp->z_moved = 1;
+	ozp->z_moved = (uint8_t)-1;
+}
+
+/*ARGSUSED*/
+static kmem_cbrc_t
+zfs_znode_move(void *buf, void *newbuf, size_t size, void *arg)
+{
+	znode_t *ozp = buf, *nzp = newbuf;
+	zfsvfs_t *zfsvfs;
+	vnode_t *vp;
+
+	/*
+	 * The znode is on the file system's list of known znodes if the vfs
+	 * pointer is valid. We set the low bit of the vfs pointer when freeing
+	 * the znode to invalidate it, and the memory patterns written by kmem
+	 * (baddcafe and deadbeef) set at least one of the two low bits. A newly
+	 * created znode sets the vfs pointer last of all to indicate that the
+	 * znode is known and in a valid state to be moved by this function.
+	 */
+	zfsvfs = ozp->z_zfsvfs;
+	if (!POINTER_IS_VALID(zfsvfs)) {
+		ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_invalid);
+		return (KMEM_CBRC_DONT_KNOW);
+	}
+
+	/*
+	 * Close a small window in which it's possible that the filesystem could
+	 * be unmounted and freed, and zfsvfs, though valid in the previous
+	 * statement, could point to unrelated memory by the time we try to
+	 * prevent the filesystem from being unmounted.
+	 */
+	rw_enter(&zfsvfs_lock, RW_WRITER);
+	if (zfsvfs != ozp->z_zfsvfs) {
+		rw_exit(&zfsvfs_lock);
+		ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck1);
+		return (KMEM_CBRC_DONT_KNOW);
+	}
+
+	/*
+	 * If the znode is still valid, then so is the file system. We know that
+	 * no valid file system can be freed while we hold zfsvfs_lock, so we
+	 * can safely ensure that the filesystem is not and will not be
+	 * unmounted. The next statement is equivalent to ZFS_ENTER().
+	 */
+	rrw_enter(&zfsvfs->z_teardown_lock, RW_READER, FTAG);
+	if (zfsvfs->z_unmounted) {
+		ZFS_EXIT(zfsvfs);
+		rw_exit(&zfsvfs_lock);
+		ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_unmounted);
+		return (KMEM_CBRC_DONT_KNOW);
+	}
+	rw_exit(&zfsvfs_lock);
+
+	mutex_enter(&zfsvfs->z_znodes_lock);
+	/*
+	 * Recheck the vfs pointer in case the znode was removed just before
+	 * acquiring the lock.
+	 */
+	if (zfsvfs != ozp->z_zfsvfs) {
+		mutex_exit(&zfsvfs->z_znodes_lock);
+		ZFS_EXIT(zfsvfs);
+		ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck2);
+		return (KMEM_CBRC_DONT_KNOW);
+	}
+
+	/*
+	 * At this point we know that as long as we hold z_znodes_lock, the
+	 * znode cannot be freed and fields within the znode can be safely
+	 * accessed. Now, prevent a race with zfs_zget().
+	 */
+	if (ZFS_OBJ_HOLD_TRYENTER(zfsvfs, ozp->z_id) == 0) {
+		mutex_exit(&zfsvfs->z_znodes_lock);
+		ZFS_EXIT(zfsvfs);
+		ZNODE_STAT_ADD(znode_move_stats.zms_obj_held);
+		return (KMEM_CBRC_LATER);
+	}
+
+	vp = ZTOV(ozp);
+	if (mutex_tryenter(&vp->v_lock) == 0) {
+		ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
+		mutex_exit(&zfsvfs->z_znodes_lock);
+		ZFS_EXIT(zfsvfs);
+		ZNODE_STAT_ADD(znode_move_stats.zms_vnode_locked);
+		return (KMEM_CBRC_LATER);
+	}
+
+	/* Only move znodes that are referenced _only_ by the DNLC. */
+	if (vp->v_count != 1 || !vn_in_dnlc(vp)) {
+		mutex_exit(&vp->v_lock);
+		ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
+		mutex_exit(&zfsvfs->z_znodes_lock);
+		ZFS_EXIT(zfsvfs);
+		ZNODE_STAT_ADD(znode_move_stats.zms_not_only_dnlc);
+		return (KMEM_CBRC_LATER);
+	}
+
+	/*
+	 * The znode is known and in a valid state to move. We're holding the
+	 * locks needed to execute the critical section.
+	 */
+	zfs_znode_move_impl(ozp, nzp);
+	mutex_exit(&vp->v_lock);
+	ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
+
+	list_link_replace(&ozp->z_link_node, &nzp->z_link_node);
+	mutex_exit(&zfsvfs->z_znodes_lock);
+	ZFS_EXIT(zfsvfs);
+
+	return (KMEM_CBRC_YES);
+}
+
+void
+zfs_znode_init(void)
+{
+	/*
+	 * Initialize zcache
+	 */
+	rw_init(&zfsvfs_lock, NULL, RW_DEFAULT, NULL);
+	ASSERT(znode_cache == NULL);
+	znode_cache = kmem_cache_create("zfs_znode_cache",
+	    sizeof (znode_t), 0, zfs_znode_cache_constructor,
+	    zfs_znode_cache_destructor, NULL, NULL, NULL, 0);
+	kmem_cache_set_move(znode_cache, zfs_znode_move);
+}
+
+void
+zfs_znode_fini(void)
+{
+	/*
+	 * Cleanup vfs & vnode ops
+	 */
+	zfs_remove_op_tables();
+
+	/*
+	 * Cleanup zcache
+	 */
+	if (znode_cache)
+		kmem_cache_destroy(znode_cache);
+	znode_cache = NULL;
+	rw_destroy(&zfsvfs_lock);
+}
+
+struct vnodeops *zfs_dvnodeops;
+struct vnodeops *zfs_fvnodeops;
+struct vnodeops *zfs_symvnodeops;
+struct vnodeops *zfs_xdvnodeops;
+struct vnodeops *zfs_evnodeops;
+struct vnodeops *zfs_sharevnodeops;
+
+void
+zfs_remove_op_tables()
+{
+	/*
+	 * Remove vfs ops
+	 */
+	ASSERT(zfsfstype);
+	(void) vfs_freevfsops_by_type(zfsfstype);
+	zfsfstype = 0;
+
+	/*
+	 * Remove vnode ops
+	 */
+	if (zfs_dvnodeops)
+		vn_freevnodeops(zfs_dvnodeops);
+	if (zfs_fvnodeops)
+		vn_freevnodeops(zfs_fvnodeops);
+	if (zfs_symvnodeops)
+		vn_freevnodeops(zfs_symvnodeops);
+	if (zfs_xdvnodeops)
+		vn_freevnodeops(zfs_xdvnodeops);
+	if (zfs_evnodeops)
+		vn_freevnodeops(zfs_evnodeops);
+	if (zfs_sharevnodeops)
+		vn_freevnodeops(zfs_sharevnodeops);
+
+	zfs_dvnodeops = NULL;
+	zfs_fvnodeops = NULL;
+	zfs_symvnodeops = NULL;
+	zfs_xdvnodeops = NULL;
+	zfs_evnodeops = NULL;
+	zfs_sharevnodeops = NULL;
+}
+
+extern const fs_operation_def_t zfs_dvnodeops_template[];
+extern const fs_operation_def_t zfs_fvnodeops_template[];
+extern const fs_operation_def_t zfs_xdvnodeops_template[];
+extern const fs_operation_def_t zfs_symvnodeops_template[];
+extern const fs_operation_def_t zfs_evnodeops_template[];
+extern const fs_operation_def_t zfs_sharevnodeops_template[];
+
+int
+zfs_create_op_tables()
+{
+	int error;
+
+	/*
+	 * zfs_dvnodeops can be set if mod_remove() calls mod_installfs()
+	 * due to a failure to remove the the 2nd modlinkage (zfs_modldrv).
+	 * In this case we just return as the ops vectors are already set up.
+	 */
+	if (zfs_dvnodeops)
+		return (0);
+
+	error = vn_make_ops(MNTTYPE_ZFS, zfs_dvnodeops_template,
+	    &zfs_dvnodeops);
+	if (error)
+		return (error);
+
+	error = vn_make_ops(MNTTYPE_ZFS, zfs_fvnodeops_template,
+	    &zfs_fvnodeops);
+	if (error)
+		return (error);
+
+	error = vn_make_ops(MNTTYPE_ZFS, zfs_symvnodeops_template,
+	    &zfs_symvnodeops);
+	if (error)
+		return (error);
+
+	error = vn_make_ops(MNTTYPE_ZFS, zfs_xdvnodeops_template,
+	    &zfs_xdvnodeops);
+	if (error)
+		return (error);
+
+	error = vn_make_ops(MNTTYPE_ZFS, zfs_evnodeops_template,
+	    &zfs_evnodeops);
+	if (error)
+		return (error);
+
+	error = vn_make_ops(MNTTYPE_ZFS, zfs_sharevnodeops_template,
+	    &zfs_sharevnodeops);
+
+	return (error);
+}
+
+int
+zfs_create_share_dir(zfsvfs_t *zfsvfs, dmu_tx_t *tx)
+{
+	zfs_acl_ids_t acl_ids;
+	vattr_t vattr;
+	znode_t *sharezp;
+	vnode_t *vp;
+	znode_t *zp;
+	int error;
+
+	vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
+	vattr.va_type = VDIR;
+	vattr.va_mode = S_IFDIR|0555;
+	vattr.va_uid = crgetuid(kcred);
+	vattr.va_gid = crgetgid(kcred);
+
+	sharezp = kmem_cache_alloc(znode_cache, KM_SLEEP);
+	ASSERT(!POINTER_IS_VALID(sharezp->z_zfsvfs));
+	sharezp->z_moved = 0;
+	sharezp->z_unlinked = 0;
+	sharezp->z_atime_dirty = 0;
+	sharezp->z_zfsvfs = zfsvfs;
+	sharezp->z_is_sa = zfsvfs->z_use_sa;
+
+	vp = ZTOV(sharezp);
+	vn_reinit(vp);
+	vp->v_type = VDIR;
+
+	VERIFY(0 == zfs_acl_ids_create(sharezp, IS_ROOT_NODE, &vattr,
+	    kcred, NULL, &acl_ids));
+	zfs_mknode(sharezp, &vattr, tx, kcred, IS_ROOT_NODE, &zp, &acl_ids);
+	ASSERT3P(zp, ==, sharezp);
+	ASSERT(!vn_in_dnlc(ZTOV(sharezp))); /* not valid to move */
+	POINTER_INVALIDATE(&sharezp->z_zfsvfs);
+	error = zap_add(zfsvfs->z_os, MASTER_NODE_OBJ,
+	    ZFS_SHARES_DIR, 8, 1, &sharezp->z_id, tx);
+	zfsvfs->z_shares_dir = sharezp->z_id;
+
+	zfs_acl_ids_free(&acl_ids);
+	ZTOV(sharezp)->v_count = 0;
+	sa_handle_destroy(sharezp->z_sa_hdl);
+	kmem_cache_free(znode_cache, sharezp);
+
+	return (error);
+}
+
+/*
+ * define a couple of values we need available
+ * for both 64 and 32 bit environments.
+ */
+#ifndef NBITSMINOR64
+#define	NBITSMINOR64	32
+#endif
+#ifndef MAXMAJ64
+#define	MAXMAJ64	0xffffffffUL
+#endif
+#ifndef	MAXMIN64
+#define	MAXMIN64	0xffffffffUL
+#endif
+
+/*
+ * Create special expldev for ZFS private use.
+ * Can't use standard expldev since it doesn't do
+ * what we want.  The standard expldev() takes a
+ * dev32_t in LP64 and expands it to a long dev_t.
+ * We need an interface that takes a dev32_t in ILP32
+ * and expands it to a long dev_t.
+ */
+static uint64_t
+zfs_expldev(dev_t dev)
+{
+#ifndef _LP64
+	major_t major = (major_t)dev >> NBITSMINOR32 & MAXMAJ32;
+	return (((uint64_t)major << NBITSMINOR64) |
+	    ((minor_t)dev & MAXMIN32));
+#else
+	return (dev);
+#endif
+}
+
+/*
+ * Special cmpldev for ZFS private use.
+ * Can't use standard cmpldev since it takes
+ * a long dev_t and compresses it to dev32_t in
+ * LP64.  We need to do a compaction of a long dev_t
+ * to a dev32_t in ILP32.
+ */
+dev_t
+zfs_cmpldev(uint64_t dev)
+{
+#ifndef _LP64
+	minor_t minor = (minor_t)dev & MAXMIN64;
+	major_t major = (major_t)(dev >> NBITSMINOR64) & MAXMAJ64;
+
+	if (major > MAXMAJ32 || minor > MAXMIN32)
+		return (NODEV32);
+
+	return (((dev32_t)major << NBITSMINOR32) | minor);
+#else
+	return (dev);
+#endif
+}
+
+static void
+zfs_znode_sa_init(zfsvfs_t *zfsvfs, znode_t *zp,
+    dmu_buf_t *db, dmu_object_type_t obj_type, sa_handle_t *sa_hdl)
+{
+	ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs) || (zfsvfs == zp->z_zfsvfs));
+	ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zfsvfs, zp->z_id)));
+
+	mutex_enter(&zp->z_lock);
+
+	ASSERT(zp->z_sa_hdl == NULL);
+	ASSERT(zp->z_acl_cached == NULL);
+	if (sa_hdl == NULL) {
+		VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, zp,
+		    SA_HDL_SHARED, &zp->z_sa_hdl));
+	} else {
+		zp->z_sa_hdl = sa_hdl;
+		sa_set_userp(sa_hdl, zp);
+	}
+
+	zp->z_is_sa = (obj_type == DMU_OT_SA) ? B_TRUE : B_FALSE;
+
+	/*
+	 * Slap on VROOT if we are the root znode
+	 */
+	if (zp->z_id == zfsvfs->z_root)
+		ZTOV(zp)->v_flag |= VROOT;
+
+	mutex_exit(&zp->z_lock);
+	vn_exists(ZTOV(zp));
+}
+
+void
+zfs_znode_dmu_fini(znode_t *zp)
+{
+	ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp->z_zfsvfs, zp->z_id)) ||
+	    zp->z_unlinked ||
+	    RW_WRITE_HELD(&zp->z_zfsvfs->z_teardown_inactive_lock));
+
+	sa_handle_destroy(zp->z_sa_hdl);
+	zp->z_sa_hdl = NULL;
+}
+
+/*
+ * Construct a new znode/vnode and intialize.
+ *
+ * This does not do a call to dmu_set_user() that is
+ * up to the caller to do, in case you don't want to
+ * return the znode
+ */
+static znode_t *
+zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
+    dmu_object_type_t obj_type, sa_handle_t *hdl)
+{
+	znode_t	*zp;
+	vnode_t *vp;
+	uint64_t mode;
+	uint64_t parent;
+	sa_bulk_attr_t bulk[9];
+	int count = 0;
+
+	zp = kmem_cache_alloc(znode_cache, KM_SLEEP);
+
+	ASSERT(zp->z_dirlocks == NULL);
+	ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
+	zp->z_moved = 0;
+
+	/*
+	 * Defer setting z_zfsvfs until the znode is ready to be a candidate for
+	 * the zfs_znode_move() callback.
+	 */
+	zp->z_sa_hdl = NULL;
+	zp->z_unlinked = 0;
+	zp->z_atime_dirty = 0;
+	zp->z_mapcnt = 0;
+	zp->z_id = db->db_object;
+	zp->z_blksz = blksz;
+	zp->z_seq = 0x7A4653;
+	zp->z_sync_cnt = 0;
+
+	vp = ZTOV(zp);
+	vn_reinit(vp);
+
+	zfs_znode_sa_init(zfsvfs, zp, db, obj_type, hdl);
+
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL, &zp->z_gen, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
+	    &zp->z_size, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs), NULL,
+	    &zp->z_links, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+	    &zp->z_pflags, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
+	    &zp->z_atime, 16);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
+	    &zp->z_uid, 8);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
+	    &zp->z_gid, 8);
+
+	if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count) != 0 || zp->z_gen == 0) {
+		if (hdl == NULL)
+			sa_handle_destroy(zp->z_sa_hdl);
+		kmem_cache_free(znode_cache, zp);
+		return (NULL);
+	}
+
+	zp->z_mode = mode;
+	vp->v_vfsp = zfsvfs->z_parent->z_vfs;
+
+	vp->v_type = IFTOVT((mode_t)mode);
+
+	switch (vp->v_type) {
+	case VDIR:
+		if (zp->z_pflags & ZFS_XATTR) {
+			vn_setops(vp, zfs_xdvnodeops);
+			vp->v_flag |= V_XATTRDIR;
+		} else {
+			vn_setops(vp, zfs_dvnodeops);
+		}
+		zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */
+		break;
+	case VBLK:
+	case VCHR:
+		{
+			uint64_t rdev;
+			VERIFY(sa_lookup(zp->z_sa_hdl, SA_ZPL_RDEV(zfsvfs),
+			    &rdev, sizeof (rdev)) == 0);
+
+			vp->v_rdev = zfs_cmpldev(rdev);
+		}
+		/*FALLTHROUGH*/
+	case VFIFO:
+	case VSOCK:
+	case VDOOR:
+		vn_setops(vp, zfs_fvnodeops);
+		break;
+	case VREG:
+		vp->v_flag |= VMODSORT;
+		if (parent == zfsvfs->z_shares_dir) {
+			ASSERT(zp->z_uid == 0 && zp->z_gid == 0);
+			vn_setops(vp, zfs_sharevnodeops);
+		} else {
+			vn_setops(vp, zfs_fvnodeops);
+		}
+		break;
+	case VLNK:
+		vn_setops(vp, zfs_symvnodeops);
+		break;
+	default:
+		vn_setops(vp, zfs_evnodeops);
+		break;
+	}
+
+	mutex_enter(&zfsvfs->z_znodes_lock);
+	list_insert_tail(&zfsvfs->z_all_znodes, zp);
+	membar_producer();
+	/*
+	 * Everything else must be valid before assigning z_zfsvfs makes the
+	 * znode eligible for zfs_znode_move().
+	 */
+	zp->z_zfsvfs = zfsvfs;
+	mutex_exit(&zfsvfs->z_znodes_lock);
+
+	VFS_HOLD(zfsvfs->z_vfs);
+	return (zp);
+}
+
+static uint64_t empty_xattr;
+static uint64_t pad[4];
+static zfs_acl_phys_t acl_phys;
+/*
+ * Create a new DMU object to hold a zfs znode.
+ *
+ *	IN:	dzp	- parent directory for new znode
+ *		vap	- file attributes for new znode
+ *		tx	- dmu transaction id for zap operations
+ *		cr	- credentials of caller
+ *		flag	- flags:
+ *			  IS_ROOT_NODE	- new object will be root
+ *			  IS_XATTR	- new object is an attribute
+ *		bonuslen - length of bonus buffer
+ *		setaclp  - File/Dir initial ACL
+ *		fuidp	 - Tracks fuid allocation.
+ *
+ *	OUT:	zpp	- allocated znode
+ *
+ */
+void
+zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
+    uint_t flag, znode_t **zpp, zfs_acl_ids_t *acl_ids)
+{
+	uint64_t	crtime[2], atime[2], mtime[2], ctime[2];
+	uint64_t	mode, size, links, parent, pflags;
+	uint64_t	dzp_pflags = 0;
+	uint64_t	rdev = 0;
+	zfsvfs_t	*zfsvfs = dzp->z_zfsvfs;
+	dmu_buf_t	*db;
+	timestruc_t	now;
+	uint64_t	gen, obj;
+	int		err;
+	int		bonuslen;
+	sa_handle_t	*sa_hdl;
+	dmu_object_type_t obj_type;
+	sa_bulk_attr_t	sa_attrs[ZPL_END];
+	int		cnt = 0;
+	zfs_acl_locator_cb_t locate = { 0 };
+
+	ASSERT(vap && (vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE));
+
+	if (zfsvfs->z_replay) {
+		obj = vap->va_nodeid;
+		now = vap->va_ctime;		/* see zfs_replay_create() */
+		gen = vap->va_nblocks;		/* ditto */
+	} else {
+		obj = 0;
+		gethrestime(&now);
+		gen = dmu_tx_get_txg(tx);
+	}
+
+	obj_type = zfsvfs->z_use_sa ? DMU_OT_SA : DMU_OT_ZNODE;
+	bonuslen = (obj_type == DMU_OT_SA) ?
+	    DN_MAX_BONUSLEN : ZFS_OLD_ZNODE_PHYS_SIZE;
+
+	/*
+	 * Create a new DMU object.
+	 */
+	/*
+	 * There's currently no mechanism for pre-reading the blocks that will
+	 * be needed to allocate a new object, so we accept the small chance
+	 * that there will be an i/o error and we will fail one of the
+	 * assertions below.
+	 */
+	if (vap->va_type == VDIR) {
+		if (zfsvfs->z_replay) {
+			err = zap_create_claim_norm(zfsvfs->z_os, obj,
+			    zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS,
+			    obj_type, bonuslen, tx);
+			ASSERT3U(err, ==, 0);
+		} else {
+			obj = zap_create_norm(zfsvfs->z_os,
+			    zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS,
+			    obj_type, bonuslen, tx);
+		}
+	} else {
+		if (zfsvfs->z_replay) {
+			err = dmu_object_claim(zfsvfs->z_os, obj,
+			    DMU_OT_PLAIN_FILE_CONTENTS, 0,
+			    obj_type, bonuslen, tx);
+			ASSERT3U(err, ==, 0);
+		} else {
+			obj = dmu_object_alloc(zfsvfs->z_os,
+			    DMU_OT_PLAIN_FILE_CONTENTS, 0,
+			    obj_type, bonuslen, tx);
+		}
+	}
+
+	ZFS_OBJ_HOLD_ENTER(zfsvfs, obj);
+	VERIFY(0 == sa_buf_hold(zfsvfs->z_os, obj, NULL, &db));
+
+	/*
+	 * If this is the root, fix up the half-initialized parent pointer
+	 * to reference the just-allocated physical data area.
+	 */
+	if (flag & IS_ROOT_NODE) {
+		dzp->z_id = obj;
+	} else {
+		dzp_pflags = dzp->z_pflags;
+	}
+
+	/*
+	 * If parent is an xattr, so am I.
+	 */
+	if (dzp_pflags & ZFS_XATTR) {
+		flag |= IS_XATTR;
+	}
+
+	if (zfsvfs->z_use_fuids)
+		pflags = ZFS_ARCHIVE | ZFS_AV_MODIFIED;
+	else
+		pflags = 0;
+
+	if (vap->va_type == VDIR) {
+		size = 2;		/* contents ("." and "..") */
+		links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1;
+	} else {
+		size = links = 0;
+	}
+
+	if (vap->va_type == VBLK || vap->va_type == VCHR) {
+		rdev = zfs_expldev(vap->va_rdev);
+	}
+
+	parent = dzp->z_id;
+	mode = acl_ids->z_mode;
+	if (flag & IS_XATTR)
+		pflags |= ZFS_XATTR;
+
+	/*
+	 * No execs denied will be deterimed when zfs_mode_compute() is called.
+	 */
+	pflags |= acl_ids->z_aclp->z_hints &
+	    (ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|ZFS_ACL_AUTO_INHERIT|
+	    ZFS_ACL_DEFAULTED|ZFS_ACL_PROTECTED);
+
+	ZFS_TIME_ENCODE(&now, crtime);
+	ZFS_TIME_ENCODE(&now, ctime);
+
+	if (vap->va_mask & AT_ATIME) {
+		ZFS_TIME_ENCODE(&vap->va_atime, atime);
+	} else {
+		ZFS_TIME_ENCODE(&now, atime);
+	}
+
+	if (vap->va_mask & AT_MTIME) {
+		ZFS_TIME_ENCODE(&vap->va_mtime, mtime);
+	} else {
+		ZFS_TIME_ENCODE(&now, mtime);
+	}
+
+	/* Now add in all of the "SA" attributes */
+	VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, NULL, SA_HDL_SHARED,
+	    &sa_hdl));
+
+	/*
+	 * Setup the array of attributes to be replaced/set on the new file
+	 *
+	 * order for  DMU_OT_ZNODE is critical since it needs to be constructed
+	 * in the old znode_phys_t format.  Don't change this ordering
+	 */
+
+	if (obj_type == DMU_OT_ZNODE) {
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zfsvfs),
+		    NULL, &atime, 16);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zfsvfs),
+		    NULL, &mtime, 16);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zfsvfs),
+		    NULL, &ctime, 16);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zfsvfs),
+		    NULL, &crtime, 16);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zfsvfs),
+		    NULL, &gen, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zfsvfs),
+		    NULL, &mode, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zfsvfs),
+		    NULL, &size, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zfsvfs),
+		    NULL, &parent, 8);
+	} else {
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zfsvfs),
+		    NULL, &mode, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zfsvfs),
+		    NULL, &size, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zfsvfs),
+		    NULL, &gen, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zfsvfs), NULL,
+		    &acl_ids->z_fuid, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zfsvfs), NULL,
+		    &acl_ids->z_fgid, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zfsvfs),
+		    NULL, &parent, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zfsvfs),
+		    NULL, &pflags, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zfsvfs),
+		    NULL, &atime, 16);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zfsvfs),
+		    NULL, &mtime, 16);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zfsvfs),
+		    NULL, &ctime, 16);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zfsvfs),
+		    NULL, &crtime, 16);
+	}
+
+	SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_LINKS(zfsvfs), NULL, &links, 8);
+
+	if (obj_type == DMU_OT_ZNODE) {
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_XATTR(zfsvfs), NULL,
+		    &empty_xattr, 8);
+	}
+	if (obj_type == DMU_OT_ZNODE ||
+	    (vap->va_type == VBLK || vap->va_type == VCHR)) {
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_RDEV(zfsvfs),
+		    NULL, &rdev, 8);
+
+	}
+	if (obj_type == DMU_OT_ZNODE) {
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zfsvfs),
+		    NULL, &pflags, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zfsvfs), NULL,
+		    &acl_ids->z_fuid, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zfsvfs), NULL,
+		    &acl_ids->z_fgid, 8);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PAD(zfsvfs), NULL, pad,
+		    sizeof (uint64_t) * 4);
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
+		    &acl_phys, sizeof (zfs_acl_phys_t));
+	} else if (acl_ids->z_aclp->z_version >= ZFS_ACL_VERSION_FUID) {
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_COUNT(zfsvfs), NULL,
+		    &acl_ids->z_aclp->z_acl_count, 8);
+		locate.cb_aclp = acl_ids->z_aclp;
+		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_ACES(zfsvfs),
+		    zfs_acl_data_locator, &locate,
+		    acl_ids->z_aclp->z_acl_bytes);
+		mode = zfs_mode_compute(mode, acl_ids->z_aclp, &pflags,
+		    acl_ids->z_fuid, acl_ids->z_fgid);
+	}
+
+	VERIFY(sa_replace_all_by_template(sa_hdl, sa_attrs, cnt, tx) == 0);
+
+	if (!(flag & IS_ROOT_NODE)) {
+		*zpp = zfs_znode_alloc(zfsvfs, db, 0, obj_type, sa_hdl);
+		ASSERT(*zpp != NULL);
+	} else {
+		/*
+		 * If we are creating the root node, the "parent" we
+		 * passed in is the znode for the root.
+		 */
+		*zpp = dzp;
+
+		(*zpp)->z_sa_hdl = sa_hdl;
+	}
+
+	(*zpp)->z_pflags = pflags;
+	(*zpp)->z_mode = mode;
+
+	if (vap->va_mask & AT_XVATTR)
+		zfs_xvattr_set(*zpp, (xvattr_t *)vap, tx);
+
+	if (obj_type == DMU_OT_ZNODE ||
+	    acl_ids->z_aclp->z_version < ZFS_ACL_VERSION_FUID) {
+		err = zfs_aclset_common(*zpp, acl_ids->z_aclp, cr, tx);
+		ASSERT3P(err, ==, 0);
+	}
+	ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
+}
+
+/*
+ * zfs_xvattr_set only updates the in-core attributes
+ * it is assumed the caller will be doing an sa_bulk_update
+ * to push the changes out
+ */
+void
+zfs_xvattr_set(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx)
+{
+	xoptattr_t *xoap;
+
+	xoap = xva_getxoptattr(xvap);
+	ASSERT(xoap);
+
+	if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) {
+		uint64_t times[2];
+		ZFS_TIME_ENCODE(&xoap->xoa_createtime, times);
+		(void) sa_update(zp->z_sa_hdl, SA_ZPL_CRTIME(zp->z_zfsvfs),
+		    &times, sizeof (times), tx);
+		XVA_SET_RTN(xvap, XAT_CREATETIME);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_READONLY)) {
+		ZFS_ATTR_SET(zp, ZFS_READONLY, xoap->xoa_readonly,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_READONLY);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) {
+		ZFS_ATTR_SET(zp, ZFS_HIDDEN, xoap->xoa_hidden,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_HIDDEN);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) {
+		ZFS_ATTR_SET(zp, ZFS_SYSTEM, xoap->xoa_system,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_SYSTEM);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) {
+		ZFS_ATTR_SET(zp, ZFS_ARCHIVE, xoap->xoa_archive,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_ARCHIVE);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
+		ZFS_ATTR_SET(zp, ZFS_IMMUTABLE, xoap->xoa_immutable,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_IMMUTABLE);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
+		ZFS_ATTR_SET(zp, ZFS_NOUNLINK, xoap->xoa_nounlink,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_NOUNLINK);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
+		ZFS_ATTR_SET(zp, ZFS_APPENDONLY, xoap->xoa_appendonly,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_APPENDONLY);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
+		ZFS_ATTR_SET(zp, ZFS_NODUMP, xoap->xoa_nodump,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_NODUMP);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) {
+		ZFS_ATTR_SET(zp, ZFS_OPAQUE, xoap->xoa_opaque,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_OPAQUE);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
+		ZFS_ATTR_SET(zp, ZFS_AV_QUARANTINED,
+		    xoap->xoa_av_quarantined, zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_AV_QUARANTINED);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
+		ZFS_ATTR_SET(zp, ZFS_AV_MODIFIED, xoap->xoa_av_modified,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_AV_MODIFIED);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) {
+		zfs_sa_set_scanstamp(zp, xvap, tx);
+		XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) {
+		ZFS_ATTR_SET(zp, ZFS_REPARSE, xoap->xoa_reparse,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_REPARSE);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) {
+		ZFS_ATTR_SET(zp, ZFS_OFFLINE, xoap->xoa_offline,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_OFFLINE);
+	}
+	if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) {
+		ZFS_ATTR_SET(zp, ZFS_SPARSE, xoap->xoa_sparse,
+		    zp->z_pflags, tx);
+		XVA_SET_RTN(xvap, XAT_SPARSE);
+	}
+}
+
+int
+zfs_zget(zfsvfs_t *zfsvfs, uint64_t obj_num, znode_t **zpp)
+{
+	dmu_object_info_t doi;
+	dmu_buf_t	*db;
+	znode_t		*zp;
+	int err;
+	sa_handle_t	*hdl;
+
+	*zpp = NULL;
+
+	ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num);
+
+	err = sa_buf_hold(zfsvfs->z_os, obj_num, NULL, &db);
+	if (err) {
+		ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+		return (err);
+	}
+
+	dmu_object_info_from_db(db, &doi);
+	if (doi.doi_bonus_type != DMU_OT_SA &&
+	    (doi.doi_bonus_type != DMU_OT_ZNODE ||
+	    (doi.doi_bonus_type == DMU_OT_ZNODE &&
+	    doi.doi_bonus_size < sizeof (znode_phys_t)))) {
+		sa_buf_rele(db, NULL);
+		ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+		return (EINVAL);
+	}
+
+	hdl = dmu_buf_get_user(db);
+	if (hdl != NULL) {
+		zp  = sa_get_userdata(hdl);
+
+
+		/*
+		 * Since "SA" does immediate eviction we
+		 * should never find a sa handle that doesn't
+		 * know about the znode.
+		 */
+
+		ASSERT3P(zp, !=, NULL);
+
+		mutex_enter(&zp->z_lock);
+		ASSERT3U(zp->z_id, ==, obj_num);
+		if (zp->z_unlinked) {
+			err = ENOENT;
+		} else {
+			VN_HOLD(ZTOV(zp));
+			*zpp = zp;
+			err = 0;
+		}
+		sa_buf_rele(db, NULL);
+		mutex_exit(&zp->z_lock);
+		ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+		return (err);
+	}
+
+	/*
+	 * Not found create new znode/vnode
+	 * but only if file exists.
+	 *
+	 * There is a small window where zfs_vget() could
+	 * find this object while a file create is still in
+	 * progress.  This is checked for in zfs_znode_alloc()
+	 *
+	 * if zfs_znode_alloc() fails it will drop the hold on the
+	 * bonus buffer.
+	 */
+	zp = zfs_znode_alloc(zfsvfs, db, doi.doi_data_block_size,
+	    doi.doi_bonus_type, NULL);
+	if (zp == NULL) {
+		err = ENOENT;
+	} else {
+		*zpp = zp;
+	}
+	ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+	return (err);
+}
+
+int
+zfs_rezget(znode_t *zp)
+{
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	dmu_object_info_t doi;
+	dmu_buf_t *db;
+	uint64_t obj_num = zp->z_id;
+	uint64_t mode;
+	sa_bulk_attr_t bulk[8];
+	int err;
+	int count = 0;
+	uint64_t gen;
+
+	ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num);
+
+	mutex_enter(&zp->z_acl_lock);
+	if (zp->z_acl_cached) {
+		zfs_acl_free(zp->z_acl_cached);
+		zp->z_acl_cached = NULL;
+	}
+
+	mutex_exit(&zp->z_acl_lock);
+	ASSERT(zp->z_sa_hdl == NULL);
+	err = sa_buf_hold(zfsvfs->z_os, obj_num, NULL, &db);
+	if (err) {
+		ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+		return (err);
+	}
+
+	dmu_object_info_from_db(db, &doi);
+	if (doi.doi_bonus_type != DMU_OT_SA &&
+	    (doi.doi_bonus_type != DMU_OT_ZNODE ||
+	    (doi.doi_bonus_type == DMU_OT_ZNODE &&
+	    doi.doi_bonus_size < sizeof (znode_phys_t)))) {
+		sa_buf_rele(db, NULL);
+		ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+		return (EINVAL);
+	}
+
+	zfs_znode_sa_init(zfsvfs, zp, db, doi.doi_bonus_type, NULL);
+
+	/* reload cached values */
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL,
+	    &gen, sizeof (gen));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
+	    &zp->z_size, sizeof (zp->z_size));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs), NULL,
+	    &zp->z_links, sizeof (zp->z_links));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+	    &zp->z_pflags, sizeof (zp->z_pflags));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
+	    &zp->z_atime, sizeof (zp->z_atime));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
+	    &zp->z_uid, sizeof (zp->z_uid));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
+	    &zp->z_gid, sizeof (zp->z_gid));
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
+	    &mode, sizeof (mode));
+
+	if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) {
+		zfs_znode_dmu_fini(zp);
+		ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+		return (EIO);
+	}
+
+	zp->z_mode = mode;
+
+	if (gen != zp->z_gen) {
+		zfs_znode_dmu_fini(zp);
+		ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+		return (EIO);
+	}
+
+	zp->z_unlinked = (zp->z_links == 0);
+	zp->z_blksz = doi.doi_data_block_size;
+
+	ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+
+	return (0);
+}
+
+void
+zfs_znode_delete(znode_t *zp, dmu_tx_t *tx)
+{
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	objset_t *os = zfsvfs->z_os;
+	uint64_t obj = zp->z_id;
+	uint64_t acl_obj = zfs_external_acl(zp);
+
+	ZFS_OBJ_HOLD_ENTER(zfsvfs, obj);
+	if (acl_obj) {
+		VERIFY(!zp->z_is_sa);
+		VERIFY(0 == dmu_object_free(os, acl_obj, tx));
+	}
+	VERIFY(0 == dmu_object_free(os, obj, tx));
+	zfs_znode_dmu_fini(zp);
+	ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
+	zfs_znode_free(zp);
+}
+
+void
+zfs_zinactive(znode_t *zp)
+{
+	vnode_t	*vp = ZTOV(zp);
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	uint64_t z_id = zp->z_id;
+
+	ASSERT(zp->z_sa_hdl);
+
+	/*
+	 * Don't allow a zfs_zget() while were trying to release this znode
+	 */
+	ZFS_OBJ_HOLD_ENTER(zfsvfs, z_id);
+
+	mutex_enter(&zp->z_lock);
+	mutex_enter(&vp->v_lock);
+	vp->v_count--;
+	if (vp->v_count > 0 || vn_has_cached_data(vp)) {
+		/*
+		 * If the hold count is greater than zero, somebody has
+		 * obtained a new reference on this znode while we were
+		 * processing it here, so we are done.  If we still have
+		 * mapped pages then we are also done, since we don't
+		 * want to inactivate the znode until the pages get pushed.
+		 *
+		 * XXX - if vn_has_cached_data(vp) is true, but count == 0,
+		 * this seems like it would leave the znode hanging with
+		 * no chance to go inactive...
+		 */
+		mutex_exit(&vp->v_lock);
+		mutex_exit(&zp->z_lock);
+		ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
+		return;
+	}
+	mutex_exit(&vp->v_lock);
+
+	/*
+	 * If this was the last reference to a file with no links,
+	 * remove the file from the file system.
+	 */
+	if (zp->z_unlinked) {
+		mutex_exit(&zp->z_lock);
+		ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
+		zfs_rmnode(zp);
+		return;
+	}
+
+	mutex_exit(&zp->z_lock);
+	zfs_znode_dmu_fini(zp);
+	ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
+	zfs_znode_free(zp);
+}
+
+void
+zfs_znode_free(znode_t *zp)
+{
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+
+	vn_invalid(ZTOV(zp));
+
+	ASSERT(ZTOV(zp)->v_count == 0);
+
+	mutex_enter(&zfsvfs->z_znodes_lock);
+	POINTER_INVALIDATE(&zp->z_zfsvfs);
+	list_remove(&zfsvfs->z_all_znodes, zp);
+	mutex_exit(&zfsvfs->z_znodes_lock);
+
+	if (zp->z_acl_cached) {
+		zfs_acl_free(zp->z_acl_cached);
+		zp->z_acl_cached = NULL;
+	}
+
+	kmem_cache_free(znode_cache, zp);
+
+	VFS_RELE(zfsvfs->z_vfs);
+}
+
+void
+zfs_tstamp_update_setup(znode_t *zp, uint_t flag, uint64_t mtime[2],
+    uint64_t ctime[2], boolean_t have_tx)
+{
+	timestruc_t	now;
+
+	gethrestime(&now);
+
+	if (have_tx) {	/* will sa_bulk_update happen really soon? */
+		zp->z_atime_dirty = 0;
+		zp->z_seq++;
+	} else {
+		zp->z_atime_dirty = 1;
+	}
+
+	if (flag & AT_ATIME) {
+		ZFS_TIME_ENCODE(&now, zp->z_atime);
+	}
+
+	if (flag & AT_MTIME) {
+		ZFS_TIME_ENCODE(&now, mtime);
+		if (zp->z_zfsvfs->z_use_fuids) {
+			zp->z_pflags |= (ZFS_ARCHIVE |
+			    ZFS_AV_MODIFIED);
+		}
+	}
+
+	if (flag & AT_CTIME) {
+		ZFS_TIME_ENCODE(&now, ctime);
+		if (zp->z_zfsvfs->z_use_fuids)
+			zp->z_pflags |= ZFS_ARCHIVE;
+	}
+}
+
+/*
+ * Grow the block size for a file.
+ *
+ *	IN:	zp	- znode of file to free data in.
+ *		size	- requested block size
+ *		tx	- open transaction.
+ *
+ * NOTE: this function assumes that the znode is write locked.
+ */
+void
+zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx)
+{
+	int		error;
+	u_longlong_t	dummy;
+
+	if (size <= zp->z_blksz)
+		return;
+	/*
+	 * If the file size is already greater than the current blocksize,
+	 * we will not grow.  If there is more than one block in a file,
+	 * the blocksize cannot change.
+	 */
+	if (zp->z_blksz && zp->z_size > zp->z_blksz)
+		return;
+
+	error = dmu_object_set_blocksize(zp->z_zfsvfs->z_os, zp->z_id,
+	    size, 0, tx);
+
+	if (error == ENOTSUP)
+		return;
+	ASSERT3U(error, ==, 0);
+
+	/* What blocksize did we actually get? */
+	dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &zp->z_blksz, &dummy);
+}
+
+/*
+ * This is a dummy interface used when pvn_vplist_dirty() should *not*
+ * be calling back into the fs for a putpage().  E.g.: when truncating
+ * a file, the pages being "thrown away* don't need to be written out.
+ */
+/* ARGSUSED */
+static int
+zfs_no_putpage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp,
+    int flags, cred_t *cr)
+{
+	ASSERT(0);
+	return (0);
+}
+
+/*
+ * Increase the file length
+ *
+ *	IN:	zp	- znode of file to free data in.
+ *		end	- new end-of-file
+ *
+ * 	RETURN:	0 if success
+ *		error code if failure
+ */
+static int
+zfs_extend(znode_t *zp, uint64_t end)
+{
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	dmu_tx_t *tx;
+	rl_t *rl;
+	uint64_t newblksz;
+	int error;
+
+	/*
+	 * We will change zp_size, lock the whole file.
+	 */
+	rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
+
+	/*
+	 * Nothing to do if file already at desired length.
+	 */
+	if (end <= zp->z_size) {
+		zfs_range_unlock(rl);
+		return (0);
+	}
+top:
+	tx = dmu_tx_create(zfsvfs->z_os);
+	dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+	zfs_sa_upgrade_txholds(tx, zp);
+	if (end > zp->z_blksz &&
+	    (!ISP2(zp->z_blksz) || zp->z_blksz < zfsvfs->z_max_blksz)) {
+		/*
+		 * We are growing the file past the current block size.
+		 */
+		if (zp->z_blksz > zp->z_zfsvfs->z_max_blksz) {
+			ASSERT(!ISP2(zp->z_blksz));
+			newblksz = MIN(end, SPA_MAXBLOCKSIZE);
+		} else {
+			newblksz = MIN(end, zp->z_zfsvfs->z_max_blksz);
+		}
+		dmu_tx_hold_write(tx, zp->z_id, 0, newblksz);
+	} else {
+		newblksz = 0;
+	}
+
+	error = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (error) {
+		if (error == ERESTART) {
+			dmu_tx_wait(tx);
+			dmu_tx_abort(tx);
+			goto top;
+		}
+		dmu_tx_abort(tx);
+		zfs_range_unlock(rl);
+		return (error);
+	}
+
+	if (newblksz)
+		zfs_grow_blocksize(zp, newblksz, tx);
+
+	zp->z_size = end;
+
+	VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zp->z_zfsvfs),
+	    &zp->z_size, sizeof (zp->z_size), tx));
+
+	zfs_range_unlock(rl);
+
+	dmu_tx_commit(tx);
+
+	return (0);
+}
+
+/*
+ * Free space in a file.
+ *
+ *	IN:	zp	- znode of file to free data in.
+ *		off	- start of section to free.
+ *		len	- length of section to free.
+ *
+ * 	RETURN:	0 if success
+ *		error code if failure
+ */
+static int
+zfs_free_range(znode_t *zp, uint64_t off, uint64_t len)
+{
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	rl_t *rl;
+	int error;
+
+	/*
+	 * Lock the range being freed.
+	 */
+	rl = zfs_range_lock(zp, off, len, RL_WRITER);
+
+	/*
+	 * Nothing to do if file already at desired length.
+	 */
+	if (off >= zp->z_size) {
+		zfs_range_unlock(rl);
+		return (0);
+	}
+
+	if (off + len > zp->z_size)
+		len = zp->z_size - off;
+
+	error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, off, len);
+
+	zfs_range_unlock(rl);
+
+	return (error);
+}
+
+/*
+ * Truncate a file
+ *
+ *	IN:	zp	- znode of file to free data in.
+ *		end	- new end-of-file.
+ *
+ * 	RETURN:	0 if success
+ *		error code if failure
+ */
+static int
+zfs_trunc(znode_t *zp, uint64_t end)
+{
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	vnode_t *vp = ZTOV(zp);
+	dmu_tx_t *tx;
+	rl_t *rl;
+	int error;
+	sa_bulk_attr_t bulk[2];
+	int count = 0;
+
+	/*
+	 * We will change zp_size, lock the whole file.
+	 */
+	rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
+
+	/*
+	 * Nothing to do if file already at desired length.
+	 */
+	if (end >= zp->z_size) {
+		zfs_range_unlock(rl);
+		return (0);
+	}
+
+	error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, end,  -1);
+	if (error) {
+		zfs_range_unlock(rl);
+		return (error);
+	}
+top:
+	tx = dmu_tx_create(zfsvfs->z_os);
+	dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+	zfs_sa_upgrade_txholds(tx, zp);
+	error = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (error) {
+		if (error == ERESTART) {
+			dmu_tx_wait(tx);
+			dmu_tx_abort(tx);
+			goto top;
+		}
+		dmu_tx_abort(tx);
+		zfs_range_unlock(rl);
+		return (error);
+	}
+
+	zp->z_size = end;
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs),
+	    NULL, &zp->z_size, sizeof (zp->z_size));
+
+	if (end == 0) {
+		zp->z_pflags &= ~ZFS_SPARSE;
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs),
+		    NULL, &zp->z_pflags, 8);
+	}
+	VERIFY(sa_bulk_update(zp->z_sa_hdl, bulk, count, tx) == 0);
+
+	dmu_tx_commit(tx);
+
+	/*
+	 * Clear any mapped pages in the truncated region.  This has to
+	 * happen outside of the transaction to avoid the possibility of
+	 * a deadlock with someone trying to push a page that we are
+	 * about to invalidate.
+	 */
+	if (vn_has_cached_data(vp)) {
+		page_t *pp;
+		uint64_t start = end & PAGEMASK;
+		int poff = end & PAGEOFFSET;
+
+		if (poff != 0 && (pp = page_lookup(vp, start, SE_SHARED))) {
+			/*
+			 * We need to zero a partial page.
+			 */
+			pagezero(pp, poff, PAGESIZE - poff);
+			start += PAGESIZE;
+			page_unlock(pp);
+		}
+		error = pvn_vplist_dirty(vp, start, zfs_no_putpage,
+		    B_INVAL | B_TRUNC, NULL);
+		ASSERT(error == 0);
+	}
+
+	zfs_range_unlock(rl);
+
+	return (0);
+}
+
+/*
+ * Free space in a file
+ *
+ *	IN:	zp	- znode of file to free data in.
+ *		off	- start of range
+ *		len	- end of range (0 => EOF)
+ *		flag	- current file open mode flags.
+ *		log	- TRUE if this action should be logged
+ *
+ * 	RETURN:	0 if success
+ *		error code if failure
+ */
+int
+zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log)
+{
+	vnode_t *vp = ZTOV(zp);
+	dmu_tx_t *tx;
+	zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+	zilog_t *zilog = zfsvfs->z_log;
+	uint64_t mode;
+	uint64_t mtime[2], ctime[2];
+	sa_bulk_attr_t bulk[3];
+	int count = 0;
+	int error;
+
+	if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_MODE(zfsvfs), &mode,
+	    sizeof (mode))) != 0)
+		return (error);
+
+	if (off > zp->z_size) {
+		error =  zfs_extend(zp, off+len);
+		if (error == 0 && log)
+			goto log;
+		else
+			return (error);
+	}
+
+	/*
+	 * Check for any locks in the region to be freed.
+	 */
+
+	if (MANDLOCK(vp, (mode_t)mode)) {
+		uint64_t length = (len ? len : zp->z_size - off);
+		if (error = chklock(vp, FWRITE, off, length, flag, NULL))
+			return (error);
+	}
+
+	if (len == 0) {
+		error = zfs_trunc(zp, off);
+	} else {
+		if ((error = zfs_free_range(zp, off, len)) == 0 &&
+		    off + len > zp->z_size)
+			error = zfs_extend(zp, off+len);
+	}
+	if (error || !log)
+		return (error);
+log:
+	tx = dmu_tx_create(zfsvfs->z_os);
+	dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+	zfs_sa_upgrade_txholds(tx, zp);
+	error = dmu_tx_assign(tx, TXG_NOWAIT);
+	if (error) {
+		if (error == ERESTART) {
+			dmu_tx_wait(tx);
+			dmu_tx_abort(tx);
+			goto log;
+		}
+		dmu_tx_abort(tx);
+		return (error);
+	}
+
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, mtime, 16);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, ctime, 16);
+	SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs),
+	    NULL, &zp->z_pflags, 8);
+	zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, B_TRUE);
+	error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
+	ASSERT(error == 0);
+
+	zfs_log_truncate(zilog, tx, TX_TRUNCATE, zp, off, len);
+
+	dmu_tx_commit(tx);
+	return (0);
+}
+
+void
+zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *zplprops, dmu_tx_t *tx)
+{
+	zfsvfs_t	zfsvfs;
+	uint64_t	moid, obj, sa_obj, version;
+	uint64_t	sense = ZFS_CASE_SENSITIVE;
+	uint64_t	norm = 0;
+	nvpair_t	*elem;
+	int		error;
+	int		i;
+	znode_t		*rootzp = NULL;
+	vnode_t		*vp;
+	vattr_t		vattr;
+	znode_t		*zp;
+	zfs_acl_ids_t	acl_ids;
+
+	/*
+	 * First attempt to create master node.
+	 */
+	/*
+	 * In an empty objset, there are no blocks to read and thus
+	 * there can be no i/o errors (which we assert below).
+	 */
+	moid = MASTER_NODE_OBJ;
+	error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE,
+	    DMU_OT_NONE, 0, tx);
+	ASSERT(error == 0);
+
+	/*
+	 * Set starting attributes.
+	 */
+	version = zfs_zpl_version_map(spa_version(dmu_objset_spa(os)));
+	elem = NULL;
+	while ((elem = nvlist_next_nvpair(zplprops, elem)) != NULL) {
+		/* For the moment we expect all zpl props to be uint64_ts */
+		uint64_t val;
+		char *name;
+
+		ASSERT(nvpair_type(elem) == DATA_TYPE_UINT64);
+		VERIFY(nvpair_value_uint64(elem, &val) == 0);
+		name = nvpair_name(elem);
+		if (strcmp(name, zfs_prop_to_name(ZFS_PROP_VERSION)) == 0) {
+			if (val < version)
+				version = val;
+		} else {
+			error = zap_update(os, moid, name, 8, 1, &val, tx);
+		}
+		ASSERT(error == 0);
+		if (strcmp(name, zfs_prop_to_name(ZFS_PROP_NORMALIZE)) == 0)
+			norm = val;
+		else if (strcmp(name, zfs_prop_to_name(ZFS_PROP_CASE)) == 0)
+			sense = val;
+	}
+	ASSERT(version != 0);
+	error = zap_update(os, moid, ZPL_VERSION_STR, 8, 1, &version, tx);
+
+	/*
+	 * Create zap object used for SA attribute registration
+	 */
+
+	if (version >= ZPL_VERSION_SA) {
+		sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE,
+		    DMU_OT_NONE, 0, tx);
+		error = zap_add(os, moid, ZFS_SA_ATTRS, 8, 1, &sa_obj, tx);
+		ASSERT(error == 0);
+	} else {
+		sa_obj = 0;
+	}
+	/*
+	 * Create a delete queue.
+	 */
+	obj = zap_create(os, DMU_OT_UNLINKED_SET, DMU_OT_NONE, 0, tx);
+
+	error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &obj, tx);
+	ASSERT(error == 0);
+
+	/*
+	 * Create root znode.  Create minimal znode/vnode/zfsvfs
+	 * to allow zfs_mknode to work.
+	 */
+	vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
+	vattr.va_type = VDIR;
+	vattr.va_mode = S_IFDIR|0755;
+	vattr.va_uid = crgetuid(cr);
+	vattr.va_gid = crgetgid(cr);
+
+	rootzp = kmem_cache_alloc(znode_cache, KM_SLEEP);
+	ASSERT(!POINTER_IS_VALID(rootzp->z_zfsvfs));
+	rootzp->z_moved = 0;
+	rootzp->z_unlinked = 0;
+	rootzp->z_atime_dirty = 0;
+	rootzp->z_is_sa = USE_SA(version, os);
+
+	vp = ZTOV(rootzp);
+	vn_reinit(vp);
+	vp->v_type = VDIR;
+
+	bzero(&zfsvfs, sizeof (zfsvfs_t));
+
+	zfsvfs.z_os = os;
+	zfsvfs.z_parent = &zfsvfs;
+	zfsvfs.z_version = version;
+	zfsvfs.z_use_fuids = USE_FUIDS(version, os);
+	zfsvfs.z_use_sa = USE_SA(version, os);
+	zfsvfs.z_norm = norm;
+
+	error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END,
+	    &zfsvfs.z_attr_table);
+
+	ASSERT(error == 0);
+
+	/*
+	 * Fold case on file systems that are always or sometimes case
+	 * insensitive.
+	 */
+	if (sense == ZFS_CASE_INSENSITIVE || sense == ZFS_CASE_MIXED)
+		zfsvfs.z_norm |= U8_TEXTPREP_TOUPPER;
+
+	mutex_init(&zfsvfs.z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
+	list_create(&zfsvfs.z_all_znodes, sizeof (znode_t),
+	    offsetof(znode_t, z_link_node));
+
+	for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
+		mutex_init(&zfsvfs.z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL);
+
+	rootzp->z_zfsvfs = &zfsvfs;
+	VERIFY(0 == zfs_acl_ids_create(rootzp, IS_ROOT_NODE, &vattr,
+	    cr, NULL, &acl_ids));
+	zfs_mknode(rootzp, &vattr, tx, cr, IS_ROOT_NODE, &zp, &acl_ids);
+	ASSERT3P(zp, ==, rootzp);
+	ASSERT(!vn_in_dnlc(ZTOV(rootzp))); /* not valid to move */
+	error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &rootzp->z_id, tx);
+	ASSERT(error == 0);
+	zfs_acl_ids_free(&acl_ids);
+	POINTER_INVALIDATE(&rootzp->z_zfsvfs);
+
+	ZTOV(rootzp)->v_count = 0;
+	sa_handle_destroy(rootzp->z_sa_hdl);
+	kmem_cache_free(znode_cache, rootzp);
+
+	/*
+	 * Create shares directory
+	 */
+
+	error = zfs_create_share_dir(&zfsvfs, tx);
+
+	ASSERT(error == 0);
+
+	for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
+		mutex_destroy(&zfsvfs.z_hold_mtx[i]);
+}
+
+#endif /* _KERNEL */
+
+static int
+zfs_sa_setup(objset_t *osp, sa_attr_type_t **sa_table)
+{
+	uint64_t sa_obj = 0;
+	int error;
+
+	error = zap_lookup(osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, &sa_obj);
+	if (error != 0 && error != ENOENT)
+		return (error);
+
+	error = sa_setup(osp, sa_obj, zfs_attr_table, ZPL_END, sa_table);
+	return (error);
+}
+
+static int
+zfs_grab_sa_handle(objset_t *osp, uint64_t obj, sa_handle_t **hdlp,
+    dmu_buf_t **db, void *tag)
+{
+	dmu_object_info_t doi;
+	int error;
+
+	if ((error = sa_buf_hold(osp, obj, tag, db)) != 0)
+		return (error);
+
+	dmu_object_info_from_db(*db, &doi);
+	if ((doi.doi_bonus_type != DMU_OT_SA &&
+	    doi.doi_bonus_type != DMU_OT_ZNODE) ||
+	    doi.doi_bonus_type == DMU_OT_ZNODE &&
+	    doi.doi_bonus_size < sizeof (znode_phys_t)) {
+		sa_buf_rele(*db, tag);
+		return (ENOTSUP);
+	}
+
+	error = sa_handle_get(osp, obj, NULL, SA_HDL_PRIVATE, hdlp);
+	if (error != 0) {
+		sa_buf_rele(*db, tag);
+		return (error);
+	}
+
+	return (0);
+}
+
+void
+zfs_release_sa_handle(sa_handle_t *hdl, dmu_buf_t *db, void *tag)
+{
+	sa_handle_destroy(hdl);
+	sa_buf_rele(db, tag);
+}
+
+/*
+ * Given an object number, return its parent object number and whether
+ * or not the object is an extended attribute directory.
+ */
+static int
+zfs_obj_to_pobj(sa_handle_t *hdl, sa_attr_type_t *sa_table, uint64_t *pobjp,
+    int *is_xattrdir)
+{
+	uint64_t parent;
+	uint64_t pflags;
+	uint64_t mode;
+	sa_bulk_attr_t bulk[3];
+	int count = 0;
+	int error;
+
+	SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_PARENT], NULL,
+	    &parent, sizeof (parent));
+	SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_FLAGS], NULL,
+	    &pflags, sizeof (pflags));
+	SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_MODE], NULL,
+	    &mode, sizeof (mode));
+
+	if ((error = sa_bulk_lookup(hdl, bulk, count)) != 0)
+		return (error);
+
+	*pobjp = parent;
+	*is_xattrdir = ((pflags & ZFS_XATTR) != 0) && S_ISDIR(mode);
+
+	return (0);
+}
+
+/*
+ * Given an object number, return some zpl level statistics
+ */
+static int
+zfs_obj_to_stats_impl(sa_handle_t *hdl, sa_attr_type_t *sa_table,
+    zfs_stat_t *sb)
+{
+	sa_bulk_attr_t bulk[4];
+	int count = 0;
+
+	SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_MODE], NULL,
+	    &sb->zs_mode, sizeof (sb->zs_mode));
+	SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_GEN], NULL,
+	    &sb->zs_gen, sizeof (sb->zs_gen));
+	SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_LINKS], NULL,
+	    &sb->zs_links, sizeof (sb->zs_links));
+	SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_CTIME], NULL,
+	    &sb->zs_ctime, sizeof (sb->zs_ctime));
+
+	return (sa_bulk_lookup(hdl, bulk, count));
+}
+
+static int
+zfs_obj_to_path_impl(objset_t *osp, uint64_t obj, sa_handle_t *hdl,
+    sa_attr_type_t *sa_table, char *buf, int len)
+{
+	sa_handle_t *sa_hdl;
+	sa_handle_t *prevhdl = NULL;
+	dmu_buf_t *prevdb = NULL;
+	dmu_buf_t *sa_db = NULL;
+	char *path = buf + len - 1;
+	int error;
+
+	*path = '\0';
+	sa_hdl = hdl;
+
+	for (;;) {
+		uint64_t pobj;
+		char component[MAXNAMELEN + 2];
+		size_t complen;
+		int is_xattrdir;
+
+		if (prevdb)
+			zfs_release_sa_handle(prevhdl, prevdb, FTAG);
+
+		if ((error = zfs_obj_to_pobj(sa_hdl, sa_table, &pobj,
+		    &is_xattrdir)) != 0)
+			break;
+
+		if (pobj == obj) {
+			if (path[0] != '/')
+				*--path = '/';
+			break;
+		}
+
+		component[0] = '/';
+		if (is_xattrdir) {
+			(void) sprintf(component + 1, "<xattrdir>");
+		} else {
+			error = zap_value_search(osp, pobj, obj,
+			    ZFS_DIRENT_OBJ(-1ULL), component + 1);
+			if (error != 0)
+				break;
+		}
+
+		complen = strlen(component);
+		path -= complen;
+		ASSERT(path >= buf);
+		bcopy(component, path, complen);
+		obj = pobj;
+
+		if (sa_hdl != hdl) {
+			prevhdl = sa_hdl;
+			prevdb = sa_db;
+		}
+		error = zfs_grab_sa_handle(osp, obj, &sa_hdl, &sa_db, FTAG);
+		if (error != 0) {
+			sa_hdl = prevhdl;
+			sa_db = prevdb;
+			break;
+		}
+	}
+
+	if (sa_hdl != NULL && sa_hdl != hdl) {
+		ASSERT(sa_db != NULL);
+		zfs_release_sa_handle(sa_hdl, sa_db, FTAG);
+	}
+
+	if (error == 0)
+		(void) memmove(buf, path, buf + len - path);
+
+	return (error);
+}
+
+int
+zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len)
+{
+	sa_attr_type_t *sa_table;
+	sa_handle_t *hdl;
+	dmu_buf_t *db;
+	int error;
+
+	error = zfs_sa_setup(osp, &sa_table);
+	if (error != 0)
+		return (error);
+
+	error = zfs_grab_sa_handle(osp, obj, &hdl, &db, FTAG);
+	if (error != 0)
+		return (error);
+
+	error = zfs_obj_to_path_impl(osp, obj, hdl, sa_table, buf, len);
+
+	zfs_release_sa_handle(hdl, db, FTAG);
+	return (error);
+}
+
+int
+zfs_obj_to_stats(objset_t *osp, uint64_t obj, zfs_stat_t *sb,
+    char *buf, int len)
+{
+	char *path = buf + len - 1;
+	sa_attr_type_t *sa_table;
+	sa_handle_t *hdl;
+	dmu_buf_t *db;
+	int error;
+
+	*path = '\0';
+
+	error = zfs_sa_setup(osp, &sa_table);
+	if (error != 0)
+		return (error);
+
+	error = zfs_grab_sa_handle(osp, obj, &hdl, &db, FTAG);
+	if (error != 0)
+		return (error);
+
+	error = zfs_obj_to_stats_impl(hdl, sa_table, sb);
+	if (error != 0) {
+		zfs_release_sa_handle(hdl, db, FTAG);
+		return (error);
+	}
+
+	error = zfs_obj_to_path_impl(osp, obj, hdl, sa_table, buf, len);
+
+	zfs_release_sa_handle(hdl, db, FTAG);
+	return (error);
+}
diff --git a/uts/common/fs/zfs/zil.c b/uts/common/fs/zfs/zil.c
new file mode 100644
index 000000000000..c66313ff6f85
--- /dev/null
+++ b/uts/common/fs/zfs/zil.c
@@ -0,0 +1,1992 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2010 Robert Milkowski */
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/dmu.h>
+#include <sys/zap.h>
+#include <sys/arc.h>
+#include <sys/stat.h>
+#include <sys/resource.h>
+#include <sys/zil.h>
+#include <sys/zil_impl.h>
+#include <sys/dsl_dataset.h>
+#include <sys/vdev_impl.h>
+#include <sys/dmu_tx.h>
+#include <sys/dsl_pool.h>
+
+/*
+ * The zfs intent log (ZIL) saves transaction records of system calls
+ * that change the file system in memory with enough information
+ * to be able to replay them. These are stored in memory until
+ * either the DMU transaction group (txg) commits them to the stable pool
+ * and they can be discarded, or they are flushed to the stable log
+ * (also in the pool) due to a fsync, O_DSYNC or other synchronous
+ * requirement. In the event of a panic or power fail then those log
+ * records (transactions) are replayed.
+ *
+ * There is one ZIL per file system. Its on-disk (pool) format consists
+ * of 3 parts:
+ *
+ * 	- ZIL header
+ * 	- ZIL blocks
+ * 	- ZIL records
+ *
+ * A log record holds a system call transaction. Log blocks can
+ * hold many log records and the blocks are chained together.
+ * Each ZIL block contains a block pointer (blkptr_t) to the next
+ * ZIL block in the chain. The ZIL header points to the first
+ * block in the chain. Note there is not a fixed place in the pool
+ * to hold blocks. They are dynamically allocated and freed as
+ * needed from the blocks available. Figure X shows the ZIL structure:
+ */
+
+/*
+ * This global ZIL switch affects all pools
+ */
+int zil_replay_disable = 0;    /* disable intent logging replay */
+
+/*
+ * Tunable parameter for debugging or performance analysis.  Setting
+ * zfs_nocacheflush will cause corruption on power loss if a volatile
+ * out-of-order write cache is enabled.
+ */
+boolean_t zfs_nocacheflush = B_FALSE;
+
+static kmem_cache_t *zil_lwb_cache;
+
+static void zil_async_to_sync(zilog_t *zilog, uint64_t foid);
+
+#define	LWB_EMPTY(lwb) ((BP_GET_LSIZE(&lwb->lwb_blk) - \
+    sizeof (zil_chain_t)) == (lwb->lwb_sz - lwb->lwb_nused))
+
+
+/*
+ * ziltest is by and large an ugly hack, but very useful in
+ * checking replay without tedious work.
+ * When running ziltest we want to keep all itx's and so maintain
+ * a single list in the zl_itxg[] that uses a high txg: ZILTEST_TXG
+ * We subtract TXG_CONCURRENT_STATES to allow for common code.
+ */
+#define	ZILTEST_TXG (UINT64_MAX - TXG_CONCURRENT_STATES)
+
+static int
+zil_bp_compare(const void *x1, const void *x2)
+{
+	const dva_t *dva1 = &((zil_bp_node_t *)x1)->zn_dva;
+	const dva_t *dva2 = &((zil_bp_node_t *)x2)->zn_dva;
+
+	if (DVA_GET_VDEV(dva1) < DVA_GET_VDEV(dva2))
+		return (-1);
+	if (DVA_GET_VDEV(dva1) > DVA_GET_VDEV(dva2))
+		return (1);
+
+	if (DVA_GET_OFFSET(dva1) < DVA_GET_OFFSET(dva2))
+		return (-1);
+	if (DVA_GET_OFFSET(dva1) > DVA_GET_OFFSET(dva2))
+		return (1);
+
+	return (0);
+}
+
+static void
+zil_bp_tree_init(zilog_t *zilog)
+{
+	avl_create(&zilog->zl_bp_tree, zil_bp_compare,
+	    sizeof (zil_bp_node_t), offsetof(zil_bp_node_t, zn_node));
+}
+
+static void
+zil_bp_tree_fini(zilog_t *zilog)
+{
+	avl_tree_t *t = &zilog->zl_bp_tree;
+	zil_bp_node_t *zn;
+	void *cookie = NULL;
+
+	while ((zn = avl_destroy_nodes(t, &cookie)) != NULL)
+		kmem_free(zn, sizeof (zil_bp_node_t));
+
+	avl_destroy(t);
+}
+
+int
+zil_bp_tree_add(zilog_t *zilog, const blkptr_t *bp)
+{
+	avl_tree_t *t = &zilog->zl_bp_tree;
+	const dva_t *dva = BP_IDENTITY(bp);
+	zil_bp_node_t *zn;
+	avl_index_t where;
+
+	if (avl_find(t, dva, &where) != NULL)
+		return (EEXIST);
+
+	zn = kmem_alloc(sizeof (zil_bp_node_t), KM_SLEEP);
+	zn->zn_dva = *dva;
+	avl_insert(t, zn, where);
+
+	return (0);
+}
+
+static zil_header_t *
+zil_header_in_syncing_context(zilog_t *zilog)
+{
+	return ((zil_header_t *)zilog->zl_header);
+}
+
+static void
+zil_init_log_chain(zilog_t *zilog, blkptr_t *bp)
+{
+	zio_cksum_t *zc = &bp->blk_cksum;
+
+	zc->zc_word[ZIL_ZC_GUID_0] = spa_get_random(-1ULL);
+	zc->zc_word[ZIL_ZC_GUID_1] = spa_get_random(-1ULL);
+	zc->zc_word[ZIL_ZC_OBJSET] = dmu_objset_id(zilog->zl_os);
+	zc->zc_word[ZIL_ZC_SEQ] = 1ULL;
+}
+
+/*
+ * Read a log block and make sure it's valid.
+ */
+static int
+zil_read_log_block(zilog_t *zilog, const blkptr_t *bp, blkptr_t *nbp, void *dst,
+    char **end)
+{
+	enum zio_flag zio_flags = ZIO_FLAG_CANFAIL;
+	uint32_t aflags = ARC_WAIT;
+	arc_buf_t *abuf = NULL;
+	zbookmark_t zb;
+	int error;
+
+	if (zilog->zl_header->zh_claim_txg == 0)
+		zio_flags |= ZIO_FLAG_SPECULATIVE | ZIO_FLAG_SCRUB;
+
+	if (!(zilog->zl_header->zh_flags & ZIL_CLAIM_LR_SEQ_VALID))
+		zio_flags |= ZIO_FLAG_SPECULATIVE;
+
+	SET_BOOKMARK(&zb, bp->blk_cksum.zc_word[ZIL_ZC_OBJSET],
+	    ZB_ZIL_OBJECT, ZB_ZIL_LEVEL, bp->blk_cksum.zc_word[ZIL_ZC_SEQ]);
+
+	error = dsl_read_nolock(NULL, zilog->zl_spa, bp, arc_getbuf_func, &abuf,
+	    ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb);
+
+	if (error == 0) {
+		zio_cksum_t cksum = bp->blk_cksum;
+
+		/*
+		 * Validate the checksummed log block.
+		 *
+		 * Sequence numbers should be... sequential.  The checksum
+		 * verifier for the next block should be bp's checksum plus 1.
+		 *
+		 * Also check the log chain linkage and size used.
+		 */
+		cksum.zc_word[ZIL_ZC_SEQ]++;
+
+		if (BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_ZILOG2) {
+			zil_chain_t *zilc = abuf->b_data;
+			char *lr = (char *)(zilc + 1);
+			uint64_t len = zilc->zc_nused - sizeof (zil_chain_t);
+
+			if (bcmp(&cksum, &zilc->zc_next_blk.blk_cksum,
+			    sizeof (cksum)) || BP_IS_HOLE(&zilc->zc_next_blk)) {
+				error = ECKSUM;
+			} else {
+				bcopy(lr, dst, len);
+				*end = (char *)dst + len;
+				*nbp = zilc->zc_next_blk;
+			}
+		} else {
+			char *lr = abuf->b_data;
+			uint64_t size = BP_GET_LSIZE(bp);
+			zil_chain_t *zilc = (zil_chain_t *)(lr + size) - 1;
+
+			if (bcmp(&cksum, &zilc->zc_next_blk.blk_cksum,
+			    sizeof (cksum)) || BP_IS_HOLE(&zilc->zc_next_blk) ||
+			    (zilc->zc_nused > (size - sizeof (*zilc)))) {
+				error = ECKSUM;
+			} else {
+				bcopy(lr, dst, zilc->zc_nused);
+				*end = (char *)dst + zilc->zc_nused;
+				*nbp = zilc->zc_next_blk;
+			}
+		}
+
+		VERIFY(arc_buf_remove_ref(abuf, &abuf) == 1);
+	}
+
+	return (error);
+}
+
+/*
+ * Read a TX_WRITE log data block.
+ */
+static int
+zil_read_log_data(zilog_t *zilog, const lr_write_t *lr, void *wbuf)
+{
+	enum zio_flag zio_flags = ZIO_FLAG_CANFAIL;
+	const blkptr_t *bp = &lr->lr_blkptr;
+	uint32_t aflags = ARC_WAIT;
+	arc_buf_t *abuf = NULL;
+	zbookmark_t zb;
+	int error;
+
+	if (BP_IS_HOLE(bp)) {
+		if (wbuf != NULL)
+			bzero(wbuf, MAX(BP_GET_LSIZE(bp), lr->lr_length));
+		return (0);
+	}
+
+	if (zilog->zl_header->zh_claim_txg == 0)
+		zio_flags |= ZIO_FLAG_SPECULATIVE | ZIO_FLAG_SCRUB;
+
+	SET_BOOKMARK(&zb, dmu_objset_id(zilog->zl_os), lr->lr_foid,
+	    ZB_ZIL_LEVEL, lr->lr_offset / BP_GET_LSIZE(bp));
+
+	error = arc_read_nolock(NULL, zilog->zl_spa, bp, arc_getbuf_func, &abuf,
+	    ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb);
+
+	if (error == 0) {
+		if (wbuf != NULL)
+			bcopy(abuf->b_data, wbuf, arc_buf_size(abuf));
+		(void) arc_buf_remove_ref(abuf, &abuf);
+	}
+
+	return (error);
+}
+
+/*
+ * Parse the intent log, and call parse_func for each valid record within.
+ */
+int
+zil_parse(zilog_t *zilog, zil_parse_blk_func_t *parse_blk_func,
+    zil_parse_lr_func_t *parse_lr_func, void *arg, uint64_t txg)
+{
+	const zil_header_t *zh = zilog->zl_header;
+	boolean_t claimed = !!zh->zh_claim_txg;
+	uint64_t claim_blk_seq = claimed ? zh->zh_claim_blk_seq : UINT64_MAX;
+	uint64_t claim_lr_seq = claimed ? zh->zh_claim_lr_seq : UINT64_MAX;
+	uint64_t max_blk_seq = 0;
+	uint64_t max_lr_seq = 0;
+	uint64_t blk_count = 0;
+	uint64_t lr_count = 0;
+	blkptr_t blk, next_blk;
+	char *lrbuf, *lrp;
+	int error = 0;
+
+	/*
+	 * Old logs didn't record the maximum zh_claim_lr_seq.
+	 */
+	if (!(zh->zh_flags & ZIL_CLAIM_LR_SEQ_VALID))
+		claim_lr_seq = UINT64_MAX;
+
+	/*
+	 * Starting at the block pointed to by zh_log we read the log chain.
+	 * For each block in the chain we strongly check that block to
+	 * ensure its validity.  We stop when an invalid block is found.
+	 * For each block pointer in the chain we call parse_blk_func().
+	 * For each record in each valid block we call parse_lr_func().
+	 * If the log has been claimed, stop if we encounter a sequence
+	 * number greater than the highest claimed sequence number.
+	 */
+	lrbuf = zio_buf_alloc(SPA_MAXBLOCKSIZE);
+	zil_bp_tree_init(zilog);
+
+	for (blk = zh->zh_log; !BP_IS_HOLE(&blk); blk = next_blk) {
+		uint64_t blk_seq = blk.blk_cksum.zc_word[ZIL_ZC_SEQ];
+		int reclen;
+		char *end;
+
+		if (blk_seq > claim_blk_seq)
+			break;
+		if ((error = parse_blk_func(zilog, &blk, arg, txg)) != 0)
+			break;
+		ASSERT3U(max_blk_seq, <, blk_seq);
+		max_blk_seq = blk_seq;
+		blk_count++;
+
+		if (max_lr_seq == claim_lr_seq && max_blk_seq == claim_blk_seq)
+			break;
+
+		error = zil_read_log_block(zilog, &blk, &next_blk, lrbuf, &end);
+		if (error)
+			break;
+
+		for (lrp = lrbuf; lrp < end; lrp += reclen) {
+			lr_t *lr = (lr_t *)lrp;
+			reclen = lr->lrc_reclen;
+			ASSERT3U(reclen, >=, sizeof (lr_t));
+			if (lr->lrc_seq > claim_lr_seq)
+				goto done;
+			if ((error = parse_lr_func(zilog, lr, arg, txg)) != 0)
+				goto done;
+			ASSERT3U(max_lr_seq, <, lr->lrc_seq);
+			max_lr_seq = lr->lrc_seq;
+			lr_count++;
+		}
+	}
+done:
+	zilog->zl_parse_error = error;
+	zilog->zl_parse_blk_seq = max_blk_seq;
+	zilog->zl_parse_lr_seq = max_lr_seq;
+	zilog->zl_parse_blk_count = blk_count;
+	zilog->zl_parse_lr_count = lr_count;
+
+	ASSERT(!claimed || !(zh->zh_flags & ZIL_CLAIM_LR_SEQ_VALID) ||
+	    (max_blk_seq == claim_blk_seq && max_lr_seq == claim_lr_seq));
+
+	zil_bp_tree_fini(zilog);
+	zio_buf_free(lrbuf, SPA_MAXBLOCKSIZE);
+
+	return (error);
+}
+
+static int
+zil_claim_log_block(zilog_t *zilog, blkptr_t *bp, void *tx, uint64_t first_txg)
+{
+	/*
+	 * Claim log block if not already committed and not already claimed.
+	 * If tx == NULL, just verify that the block is claimable.
+	 */
+	if (bp->blk_birth < first_txg || zil_bp_tree_add(zilog, bp) != 0)
+		return (0);
+
+	return (zio_wait(zio_claim(NULL, zilog->zl_spa,
+	    tx == NULL ? 0 : first_txg, bp, spa_claim_notify, NULL,
+	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_SCRUB)));
+}
+
+static int
+zil_claim_log_record(zilog_t *zilog, lr_t *lrc, void *tx, uint64_t first_txg)
+{
+	lr_write_t *lr = (lr_write_t *)lrc;
+	int error;
+
+	if (lrc->lrc_txtype != TX_WRITE)
+		return (0);
+
+	/*
+	 * If the block is not readable, don't claim it.  This can happen
+	 * in normal operation when a log block is written to disk before
+	 * some of the dmu_sync() blocks it points to.  In this case, the
+	 * transaction cannot have been committed to anyone (we would have
+	 * waited for all writes to be stable first), so it is semantically
+	 * correct to declare this the end of the log.
+	 */
+	if (lr->lr_blkptr.blk_birth >= first_txg &&
+	    (error = zil_read_log_data(zilog, lr, NULL)) != 0)
+		return (error);
+	return (zil_claim_log_block(zilog, &lr->lr_blkptr, tx, first_txg));
+}
+
+/* ARGSUSED */
+static int
+zil_free_log_block(zilog_t *zilog, blkptr_t *bp, void *tx, uint64_t claim_txg)
+{
+	zio_free_zil(zilog->zl_spa, dmu_tx_get_txg(tx), bp);
+
+	return (0);
+}
+
+static int
+zil_free_log_record(zilog_t *zilog, lr_t *lrc, void *tx, uint64_t claim_txg)
+{
+	lr_write_t *lr = (lr_write_t *)lrc;
+	blkptr_t *bp = &lr->lr_blkptr;
+
+	/*
+	 * If we previously claimed it, we need to free it.
+	 */
+	if (claim_txg != 0 && lrc->lrc_txtype == TX_WRITE &&
+	    bp->blk_birth >= claim_txg && zil_bp_tree_add(zilog, bp) == 0)
+		zio_free(zilog->zl_spa, dmu_tx_get_txg(tx), bp);
+
+	return (0);
+}
+
+static lwb_t *
+zil_alloc_lwb(zilog_t *zilog, blkptr_t *bp, uint64_t txg)
+{
+	lwb_t *lwb;
+
+	lwb = kmem_cache_alloc(zil_lwb_cache, KM_SLEEP);
+	lwb->lwb_zilog = zilog;
+	lwb->lwb_blk = *bp;
+	lwb->lwb_buf = zio_buf_alloc(BP_GET_LSIZE(bp));
+	lwb->lwb_max_txg = txg;
+	lwb->lwb_zio = NULL;
+	lwb->lwb_tx = NULL;
+	if (BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_ZILOG2) {
+		lwb->lwb_nused = sizeof (zil_chain_t);
+		lwb->lwb_sz = BP_GET_LSIZE(bp);
+	} else {
+		lwb->lwb_nused = 0;
+		lwb->lwb_sz = BP_GET_LSIZE(bp) - sizeof (zil_chain_t);
+	}
+
+	mutex_enter(&zilog->zl_lock);
+	list_insert_tail(&zilog->zl_lwb_list, lwb);
+	mutex_exit(&zilog->zl_lock);
+
+	return (lwb);
+}
+
+/*
+ * Create an on-disk intent log.
+ */
+static lwb_t *
+zil_create(zilog_t *zilog)
+{
+	const zil_header_t *zh = zilog->zl_header;
+	lwb_t *lwb = NULL;
+	uint64_t txg = 0;
+	dmu_tx_t *tx = NULL;
+	blkptr_t blk;
+	int error = 0;
+
+	/*
+	 * Wait for any previous destroy to complete.
+	 */
+	txg_wait_synced(zilog->zl_dmu_pool, zilog->zl_destroy_txg);
+
+	ASSERT(zh->zh_claim_txg == 0);
+	ASSERT(zh->zh_replay_seq == 0);
+
+	blk = zh->zh_log;
+
+	/*
+	 * Allocate an initial log block if:
+	 *    - there isn't one already
+	 *    - the existing block is the wrong endianess
+	 */
+	if (BP_IS_HOLE(&blk) || BP_SHOULD_BYTESWAP(&blk)) {
+		tx = dmu_tx_create(zilog->zl_os);
+		VERIFY(dmu_tx_assign(tx, TXG_WAIT) == 0);
+		dsl_dataset_dirty(dmu_objset_ds(zilog->zl_os), tx);
+		txg = dmu_tx_get_txg(tx);
+
+		if (!BP_IS_HOLE(&blk)) {
+			zio_free_zil(zilog->zl_spa, txg, &blk);
+			BP_ZERO(&blk);
+		}
+
+		error = zio_alloc_zil(zilog->zl_spa, txg, &blk, NULL,
+		    ZIL_MIN_BLKSZ, zilog->zl_logbias == ZFS_LOGBIAS_LATENCY);
+
+		if (error == 0)
+			zil_init_log_chain(zilog, &blk);
+	}
+
+	/*
+	 * Allocate a log write buffer (lwb) for the first log block.
+	 */
+	if (error == 0)
+		lwb = zil_alloc_lwb(zilog, &blk, txg);
+
+	/*
+	 * If we just allocated the first log block, commit our transaction
+	 * and wait for zil_sync() to stuff the block poiner into zh_log.
+	 * (zh is part of the MOS, so we cannot modify it in open context.)
+	 */
+	if (tx != NULL) {
+		dmu_tx_commit(tx);
+		txg_wait_synced(zilog->zl_dmu_pool, txg);
+	}
+
+	ASSERT(bcmp(&blk, &zh->zh_log, sizeof (blk)) == 0);
+
+	return (lwb);
+}
+
+/*
+ * In one tx, free all log blocks and clear the log header.
+ * If keep_first is set, then we're replaying a log with no content.
+ * We want to keep the first block, however, so that the first
+ * synchronous transaction doesn't require a txg_wait_synced()
+ * in zil_create().  We don't need to txg_wait_synced() here either
+ * when keep_first is set, because both zil_create() and zil_destroy()
+ * will wait for any in-progress destroys to complete.
+ */
+void
+zil_destroy(zilog_t *zilog, boolean_t keep_first)
+{
+	const zil_header_t *zh = zilog->zl_header;
+	lwb_t *lwb;
+	dmu_tx_t *tx;
+	uint64_t txg;
+
+	/*
+	 * Wait for any previous destroy to complete.
+	 */
+	txg_wait_synced(zilog->zl_dmu_pool, zilog->zl_destroy_txg);
+
+	zilog->zl_old_header = *zh;		/* debugging aid */
+
+	if (BP_IS_HOLE(&zh->zh_log))
+		return;
+
+	tx = dmu_tx_create(zilog->zl_os);
+	VERIFY(dmu_tx_assign(tx, TXG_WAIT) == 0);
+	dsl_dataset_dirty(dmu_objset_ds(zilog->zl_os), tx);
+	txg = dmu_tx_get_txg(tx);
+
+	mutex_enter(&zilog->zl_lock);
+
+	ASSERT3U(zilog->zl_destroy_txg, <, txg);
+	zilog->zl_destroy_txg = txg;
+	zilog->zl_keep_first = keep_first;
+
+	if (!list_is_empty(&zilog->zl_lwb_list)) {
+		ASSERT(zh->zh_claim_txg == 0);
+		ASSERT(!keep_first);
+		while ((lwb = list_head(&zilog->zl_lwb_list)) != NULL) {
+			list_remove(&zilog->zl_lwb_list, lwb);
+			if (lwb->lwb_buf != NULL)
+				zio_buf_free(lwb->lwb_buf, lwb->lwb_sz);
+			zio_free_zil(zilog->zl_spa, txg, &lwb->lwb_blk);
+			kmem_cache_free(zil_lwb_cache, lwb);
+		}
+	} else if (!keep_first) {
+		(void) zil_parse(zilog, zil_free_log_block,
+		    zil_free_log_record, tx, zh->zh_claim_txg);
+	}
+	mutex_exit(&zilog->zl_lock);
+
+	dmu_tx_commit(tx);
+}
+
+int
+zil_claim(const char *osname, void *txarg)
+{
+	dmu_tx_t *tx = txarg;
+	uint64_t first_txg = dmu_tx_get_txg(tx);
+	zilog_t *zilog;
+	zil_header_t *zh;
+	objset_t *os;
+	int error;
+
+	error = dmu_objset_hold(osname, FTAG, &os);
+	if (error) {
+		cmn_err(CE_WARN, "can't open objset for %s", osname);
+		return (0);
+	}
+
+	zilog = dmu_objset_zil(os);
+	zh = zil_header_in_syncing_context(zilog);
+
+	if (spa_get_log_state(zilog->zl_spa) == SPA_LOG_CLEAR) {
+		if (!BP_IS_HOLE(&zh->zh_log))
+			zio_free_zil(zilog->zl_spa, first_txg, &zh->zh_log);
+		BP_ZERO(&zh->zh_log);
+		dsl_dataset_dirty(dmu_objset_ds(os), tx);
+		dmu_objset_rele(os, FTAG);
+		return (0);
+	}
+
+	/*
+	 * Claim all log blocks if we haven't already done so, and remember
+	 * the highest claimed sequence number.  This ensures that if we can
+	 * read only part of the log now (e.g. due to a missing device),
+	 * but we can read the entire log later, we will not try to replay
+	 * or destroy beyond the last block we successfully claimed.
+	 */
+	ASSERT3U(zh->zh_claim_txg, <=, first_txg);
+	if (zh->zh_claim_txg == 0 && !BP_IS_HOLE(&zh->zh_log)) {
+		(void) zil_parse(zilog, zil_claim_log_block,
+		    zil_claim_log_record, tx, first_txg);
+		zh->zh_claim_txg = first_txg;
+		zh->zh_claim_blk_seq = zilog->zl_parse_blk_seq;
+		zh->zh_claim_lr_seq = zilog->zl_parse_lr_seq;
+		if (zilog->zl_parse_lr_count || zilog->zl_parse_blk_count > 1)
+			zh->zh_flags |= ZIL_REPLAY_NEEDED;
+		zh->zh_flags |= ZIL_CLAIM_LR_SEQ_VALID;
+		dsl_dataset_dirty(dmu_objset_ds(os), tx);
+	}
+
+	ASSERT3U(first_txg, ==, (spa_last_synced_txg(zilog->zl_spa) + 1));
+	dmu_objset_rele(os, FTAG);
+	return (0);
+}
+
+/*
+ * Check the log by walking the log chain.
+ * Checksum errors are ok as they indicate the end of the chain.
+ * Any other error (no device or read failure) returns an error.
+ */
+int
+zil_check_log_chain(const char *osname, void *tx)
+{
+	zilog_t *zilog;
+	objset_t *os;
+	blkptr_t *bp;
+	int error;
+
+	ASSERT(tx == NULL);
+
+	error = dmu_objset_hold(osname, FTAG, &os);
+	if (error) {
+		cmn_err(CE_WARN, "can't open objset for %s", osname);
+		return (0);
+	}
+
+	zilog = dmu_objset_zil(os);
+	bp = (blkptr_t *)&zilog->zl_header->zh_log;
+
+	/*
+	 * Check the first block and determine if it's on a log device
+	 * which may have been removed or faulted prior to loading this
+	 * pool.  If so, there's no point in checking the rest of the log
+	 * as its content should have already been synced to the pool.
+	 */
+	if (!BP_IS_HOLE(bp)) {
+		vdev_t *vd;
+		boolean_t valid = B_TRUE;
+
+		spa_config_enter(os->os_spa, SCL_STATE, FTAG, RW_READER);
+		vd = vdev_lookup_top(os->os_spa, DVA_GET_VDEV(&bp->blk_dva[0]));
+		if (vd->vdev_islog && vdev_is_dead(vd))
+			valid = vdev_log_state_valid(vd);
+		spa_config_exit(os->os_spa, SCL_STATE, FTAG);
+
+		if (!valid) {
+			dmu_objset_rele(os, FTAG);
+			return (0);
+		}
+	}
+
+	/*
+	 * Because tx == NULL, zil_claim_log_block() will not actually claim
+	 * any blocks, but just determine whether it is possible to do so.
+	 * In addition to checking the log chain, zil_claim_log_block()
+	 * will invoke zio_claim() with a done func of spa_claim_notify(),
+	 * which will update spa_max_claim_txg.  See spa_load() for details.
+	 */
+	error = zil_parse(zilog, zil_claim_log_block, zil_claim_log_record, tx,
+	    zilog->zl_header->zh_claim_txg ? -1ULL : spa_first_txg(os->os_spa));
+
+	dmu_objset_rele(os, FTAG);
+
+	return ((error == ECKSUM || error == ENOENT) ? 0 : error);
+}
+
+static int
+zil_vdev_compare(const void *x1, const void *x2)
+{
+	const uint64_t v1 = ((zil_vdev_node_t *)x1)->zv_vdev;
+	const uint64_t v2 = ((zil_vdev_node_t *)x2)->zv_vdev;
+
+	if (v1 < v2)
+		return (-1);
+	if (v1 > v2)
+		return (1);
+
+	return (0);
+}
+
+void
+zil_add_block(zilog_t *zilog, const blkptr_t *bp)
+{
+	avl_tree_t *t = &zilog->zl_vdev_tree;
+	avl_index_t where;
+	zil_vdev_node_t *zv, zvsearch;
+	int ndvas = BP_GET_NDVAS(bp);
+	int i;
+
+	if (zfs_nocacheflush)
+		return;
+
+	ASSERT(zilog->zl_writer);
+
+	/*
+	 * Even though we're zl_writer, we still need a lock because the
+	 * zl_get_data() callbacks may have dmu_sync() done callbacks
+	 * that will run concurrently.
+	 */
+	mutex_enter(&zilog->zl_vdev_lock);
+	for (i = 0; i < ndvas; i++) {
+		zvsearch.zv_vdev = DVA_GET_VDEV(&bp->blk_dva[i]);
+		if (avl_find(t, &zvsearch, &where) == NULL) {
+			zv = kmem_alloc(sizeof (*zv), KM_SLEEP);
+			zv->zv_vdev = zvsearch.zv_vdev;
+			avl_insert(t, zv, where);
+		}
+	}
+	mutex_exit(&zilog->zl_vdev_lock);
+}
+
+static void
+zil_flush_vdevs(zilog_t *zilog)
+{
+	spa_t *spa = zilog->zl_spa;
+	avl_tree_t *t = &zilog->zl_vdev_tree;
+	void *cookie = NULL;
+	zil_vdev_node_t *zv;
+	zio_t *zio;
+
+	ASSERT(zilog->zl_writer);
+
+	/*
+	 * We don't need zl_vdev_lock here because we're the zl_writer,
+	 * and all zl_get_data() callbacks are done.
+	 */
+	if (avl_numnodes(t) == 0)
+		return;
+
+	spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
+
+	zio = zio_root(spa, NULL, NULL, ZIO_FLAG_CANFAIL);
+
+	while ((zv = avl_destroy_nodes(t, &cookie)) != NULL) {
+		vdev_t *vd = vdev_lookup_top(spa, zv->zv_vdev);
+		if (vd != NULL)
+			zio_flush(zio, vd);
+		kmem_free(zv, sizeof (*zv));
+	}
+
+	/*
+	 * Wait for all the flushes to complete.  Not all devices actually
+	 * support the DKIOCFLUSHWRITECACHE ioctl, so it's OK if it fails.
+	 */
+	(void) zio_wait(zio);
+
+	spa_config_exit(spa, SCL_STATE, FTAG);
+}
+
+/*
+ * Function called when a log block write completes
+ */
+static void
+zil_lwb_write_done(zio_t *zio)
+{
+	lwb_t *lwb = zio->io_private;
+	zilog_t *zilog = lwb->lwb_zilog;
+	dmu_tx_t *tx = lwb->lwb_tx;
+
+	ASSERT(BP_GET_COMPRESS(zio->io_bp) == ZIO_COMPRESS_OFF);
+	ASSERT(BP_GET_TYPE(zio->io_bp) == DMU_OT_INTENT_LOG);
+	ASSERT(BP_GET_LEVEL(zio->io_bp) == 0);
+	ASSERT(BP_GET_BYTEORDER(zio->io_bp) == ZFS_HOST_BYTEORDER);
+	ASSERT(!BP_IS_GANG(zio->io_bp));
+	ASSERT(!BP_IS_HOLE(zio->io_bp));
+	ASSERT(zio->io_bp->blk_fill == 0);
+
+	/*
+	 * Ensure the lwb buffer pointer is cleared before releasing
+	 * the txg. If we have had an allocation failure and
+	 * the txg is waiting to sync then we want want zil_sync()
+	 * to remove the lwb so that it's not picked up as the next new
+	 * one in zil_commit_writer(). zil_sync() will only remove
+	 * the lwb if lwb_buf is null.
+	 */
+	zio_buf_free(lwb->lwb_buf, lwb->lwb_sz);
+	mutex_enter(&zilog->zl_lock);
+	lwb->lwb_buf = NULL;
+	lwb->lwb_tx = NULL;
+	mutex_exit(&zilog->zl_lock);
+
+	/*
+	 * Now that we've written this log block, we have a stable pointer
+	 * to the next block in the chain, so it's OK to let the txg in
+	 * which we allocated the next block sync.
+	 */
+	dmu_tx_commit(tx);
+}
+
+/*
+ * Initialize the io for a log block.
+ */
+static void
+zil_lwb_write_init(zilog_t *zilog, lwb_t *lwb)
+{
+	zbookmark_t zb;
+
+	SET_BOOKMARK(&zb, lwb->lwb_blk.blk_cksum.zc_word[ZIL_ZC_OBJSET],
+	    ZB_ZIL_OBJECT, ZB_ZIL_LEVEL,
+	    lwb->lwb_blk.blk_cksum.zc_word[ZIL_ZC_SEQ]);
+
+	if (zilog->zl_root_zio == NULL) {
+		zilog->zl_root_zio = zio_root(zilog->zl_spa, NULL, NULL,
+		    ZIO_FLAG_CANFAIL);
+	}
+	if (lwb->lwb_zio == NULL) {
+		lwb->lwb_zio = zio_rewrite(zilog->zl_root_zio, zilog->zl_spa,
+		    0, &lwb->lwb_blk, lwb->lwb_buf, BP_GET_LSIZE(&lwb->lwb_blk),
+		    zil_lwb_write_done, lwb, ZIO_PRIORITY_LOG_WRITE,
+		    ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_PROPAGATE, &zb);
+	}
+}
+
+/*
+ * Define a limited set of intent log block sizes.
+ * These must be a multiple of 4KB. Note only the amount used (again
+ * aligned to 4KB) actually gets written. However, we can't always just
+ * allocate SPA_MAXBLOCKSIZE as the slog space could be exhausted.
+ */
+uint64_t zil_block_buckets[] = {
+    4096,		/* non TX_WRITE */
+    8192+4096,		/* data base */
+    32*1024 + 4096, 	/* NFS writes */
+    UINT64_MAX
+};
+
+/*
+ * Use the slog as long as the logbias is 'latency' and the current commit size
+ * is less than the limit or the total list size is less than 2X the limit.
+ * Limit checking is disabled by setting zil_slog_limit to UINT64_MAX.
+ */
+uint64_t zil_slog_limit = 1024 * 1024;
+#define	USE_SLOG(zilog) (((zilog)->zl_logbias == ZFS_LOGBIAS_LATENCY) && \
+	(((zilog)->zl_cur_used < zil_slog_limit) || \
+	((zilog)->zl_itx_list_sz < (zil_slog_limit << 1))))
+
+/*
+ * Start a log block write and advance to the next log block.
+ * Calls are serialized.
+ */
+static lwb_t *
+zil_lwb_write_start(zilog_t *zilog, lwb_t *lwb)
+{
+	lwb_t *nlwb = NULL;
+	zil_chain_t *zilc;
+	spa_t *spa = zilog->zl_spa;
+	blkptr_t *bp;
+	dmu_tx_t *tx;
+	uint64_t txg;
+	uint64_t zil_blksz, wsz;
+	int i, error;
+
+	if (BP_GET_CHECKSUM(&lwb->lwb_blk) == ZIO_CHECKSUM_ZILOG2) {
+		zilc = (zil_chain_t *)lwb->lwb_buf;
+		bp = &zilc->zc_next_blk;
+	} else {
+		zilc = (zil_chain_t *)(lwb->lwb_buf + lwb->lwb_sz);
+		bp = &zilc->zc_next_blk;
+	}
+
+	ASSERT(lwb->lwb_nused <= lwb->lwb_sz);
+
+	/*
+	 * Allocate the next block and save its address in this block
+	 * before writing it in order to establish the log chain.
+	 * Note that if the allocation of nlwb synced before we wrote
+	 * the block that points at it (lwb), we'd leak it if we crashed.
+	 * Therefore, we don't do dmu_tx_commit() until zil_lwb_write_done().
+	 * We dirty the dataset to ensure that zil_sync() will be called
+	 * to clean up in the event of allocation failure or I/O failure.
+	 */
+	tx = dmu_tx_create(zilog->zl_os);
+	VERIFY(dmu_tx_assign(tx, TXG_WAIT) == 0);
+	dsl_dataset_dirty(dmu_objset_ds(zilog->zl_os), tx);
+	txg = dmu_tx_get_txg(tx);
+
+	lwb->lwb_tx = tx;
+
+	/*
+	 * Log blocks are pre-allocated. Here we select the size of the next
+	 * block, based on size used in the last block.
+	 * - first find the smallest bucket that will fit the block from a
+	 *   limited set of block sizes. This is because it's faster to write
+	 *   blocks allocated from the same metaslab as they are adjacent or
+	 *   close.
+	 * - next find the maximum from the new suggested size and an array of
+	 *   previous sizes. This lessens a picket fence effect of wrongly
+	 *   guesssing the size if we have a stream of say 2k, 64k, 2k, 64k
+	 *   requests.
+	 *
+	 * Note we only write what is used, but we can't just allocate
+	 * the maximum block size because we can exhaust the available
+	 * pool log space.
+	 */
+	zil_blksz = zilog->zl_cur_used + sizeof (zil_chain_t);
+	for (i = 0; zil_blksz > zil_block_buckets[i]; i++)
+		continue;
+	zil_blksz = zil_block_buckets[i];
+	if (zil_blksz == UINT64_MAX)
+		zil_blksz = SPA_MAXBLOCKSIZE;
+	zilog->zl_prev_blks[zilog->zl_prev_rotor] = zil_blksz;
+	for (i = 0; i < ZIL_PREV_BLKS; i++)
+		zil_blksz = MAX(zil_blksz, zilog->zl_prev_blks[i]);
+	zilog->zl_prev_rotor = (zilog->zl_prev_rotor + 1) & (ZIL_PREV_BLKS - 1);
+
+	BP_ZERO(bp);
+	/* pass the old blkptr in order to spread log blocks across devs */
+	error = zio_alloc_zil(spa, txg, bp, &lwb->lwb_blk, zil_blksz,
+	    USE_SLOG(zilog));
+	if (!error) {
+		ASSERT3U(bp->blk_birth, ==, txg);
+		bp->blk_cksum = lwb->lwb_blk.blk_cksum;
+		bp->blk_cksum.zc_word[ZIL_ZC_SEQ]++;
+
+		/*
+		 * Allocate a new log write buffer (lwb).
+		 */
+		nlwb = zil_alloc_lwb(zilog, bp, txg);
+
+		/* Record the block for later vdev flushing */
+		zil_add_block(zilog, &lwb->lwb_blk);
+	}
+
+	if (BP_GET_CHECKSUM(&lwb->lwb_blk) == ZIO_CHECKSUM_ZILOG2) {
+		/* For Slim ZIL only write what is used. */
+		wsz = P2ROUNDUP_TYPED(lwb->lwb_nused, ZIL_MIN_BLKSZ, uint64_t);
+		ASSERT3U(wsz, <=, lwb->lwb_sz);
+		zio_shrink(lwb->lwb_zio, wsz);
+
+	} else {
+		wsz = lwb->lwb_sz;
+	}
+
+	zilc->zc_pad = 0;
+	zilc->zc_nused = lwb->lwb_nused;
+	zilc->zc_eck.zec_cksum = lwb->lwb_blk.blk_cksum;
+
+	/*
+	 * clear unused data for security
+	 */
+	bzero(lwb->lwb_buf + lwb->lwb_nused, wsz - lwb->lwb_nused);
+
+	zio_nowait(lwb->lwb_zio); /* Kick off the write for the old log block */
+
+	/*
+	 * If there was an allocation failure then nlwb will be null which
+	 * forces a txg_wait_synced().
+	 */
+	return (nlwb);
+}
+
+static lwb_t *
+zil_lwb_commit(zilog_t *zilog, itx_t *itx, lwb_t *lwb)
+{
+	lr_t *lrc = &itx->itx_lr; /* common log record */
+	lr_write_t *lrw = (lr_write_t *)lrc;
+	char *lr_buf;
+	uint64_t txg = lrc->lrc_txg;
+	uint64_t reclen = lrc->lrc_reclen;
+	uint64_t dlen = 0;
+
+	if (lwb == NULL)
+		return (NULL);
+
+	ASSERT(lwb->lwb_buf != NULL);
+
+	if (lrc->lrc_txtype == TX_WRITE && itx->itx_wr_state == WR_NEED_COPY)
+		dlen = P2ROUNDUP_TYPED(
+		    lrw->lr_length, sizeof (uint64_t), uint64_t);
+
+	zilog->zl_cur_used += (reclen + dlen);
+
+	zil_lwb_write_init(zilog, lwb);
+
+	/*
+	 * If this record won't fit in the current log block, start a new one.
+	 */
+	if (lwb->lwb_nused + reclen + dlen > lwb->lwb_sz) {
+		lwb = zil_lwb_write_start(zilog, lwb);
+		if (lwb == NULL)
+			return (NULL);
+		zil_lwb_write_init(zilog, lwb);
+		ASSERT(LWB_EMPTY(lwb));
+		if (lwb->lwb_nused + reclen + dlen > lwb->lwb_sz) {
+			txg_wait_synced(zilog->zl_dmu_pool, txg);
+			return (lwb);
+		}
+	}
+
+	lr_buf = lwb->lwb_buf + lwb->lwb_nused;
+	bcopy(lrc, lr_buf, reclen);
+	lrc = (lr_t *)lr_buf;
+	lrw = (lr_write_t *)lrc;
+
+	/*
+	 * If it's a write, fetch the data or get its blkptr as appropriate.
+	 */
+	if (lrc->lrc_txtype == TX_WRITE) {
+		if (txg > spa_freeze_txg(zilog->zl_spa))
+			txg_wait_synced(zilog->zl_dmu_pool, txg);
+		if (itx->itx_wr_state != WR_COPIED) {
+			char *dbuf;
+			int error;
+
+			if (dlen) {
+				ASSERT(itx->itx_wr_state == WR_NEED_COPY);
+				dbuf = lr_buf + reclen;
+				lrw->lr_common.lrc_reclen += dlen;
+			} else {
+				ASSERT(itx->itx_wr_state == WR_INDIRECT);
+				dbuf = NULL;
+			}
+			error = zilog->zl_get_data(
+			    itx->itx_private, lrw, dbuf, lwb->lwb_zio);
+			if (error == EIO) {
+				txg_wait_synced(zilog->zl_dmu_pool, txg);
+				return (lwb);
+			}
+			if (error) {
+				ASSERT(error == ENOENT || error == EEXIST ||
+				    error == EALREADY);
+				return (lwb);
+			}
+		}
+	}
+
+	/*
+	 * We're actually making an entry, so update lrc_seq to be the
+	 * log record sequence number.  Note that this is generally not
+	 * equal to the itx sequence number because not all transactions
+	 * are synchronous, and sometimes spa_sync() gets there first.
+	 */
+	lrc->lrc_seq = ++zilog->zl_lr_seq; /* we are single threaded */
+	lwb->lwb_nused += reclen + dlen;
+	lwb->lwb_max_txg = MAX(lwb->lwb_max_txg, txg);
+	ASSERT3U(lwb->lwb_nused, <=, lwb->lwb_sz);
+	ASSERT3U(P2PHASE(lwb->lwb_nused, sizeof (uint64_t)), ==, 0);
+
+	return (lwb);
+}
+
+itx_t *
+zil_itx_create(uint64_t txtype, size_t lrsize)
+{
+	itx_t *itx;
+
+	lrsize = P2ROUNDUP_TYPED(lrsize, sizeof (uint64_t), size_t);
+
+	itx = kmem_alloc(offsetof(itx_t, itx_lr) + lrsize, KM_SLEEP);
+	itx->itx_lr.lrc_txtype = txtype;
+	itx->itx_lr.lrc_reclen = lrsize;
+	itx->itx_sod = lrsize; /* if write & WR_NEED_COPY will be increased */
+	itx->itx_lr.lrc_seq = 0;	/* defensive */
+	itx->itx_sync = B_TRUE;		/* default is synchronous */
+
+	return (itx);
+}
+
+void
+zil_itx_destroy(itx_t *itx)
+{
+	kmem_free(itx, offsetof(itx_t, itx_lr) + itx->itx_lr.lrc_reclen);
+}
+
+/*
+ * Free up the sync and async itxs. The itxs_t has already been detached
+ * so no locks are needed.
+ */
+static void
+zil_itxg_clean(itxs_t *itxs)
+{
+	itx_t *itx;
+	list_t *list;
+	avl_tree_t *t;
+	void *cookie;
+	itx_async_node_t *ian;
+
+	list = &itxs->i_sync_list;
+	while ((itx = list_head(list)) != NULL) {
+		list_remove(list, itx);
+		kmem_free(itx, offsetof(itx_t, itx_lr) +
+		    itx->itx_lr.lrc_reclen);
+	}
+
+	cookie = NULL;
+	t = &itxs->i_async_tree;
+	while ((ian = avl_destroy_nodes(t, &cookie)) != NULL) {
+		list = &ian->ia_list;
+		while ((itx = list_head(list)) != NULL) {
+			list_remove(list, itx);
+			kmem_free(itx, offsetof(itx_t, itx_lr) +
+			    itx->itx_lr.lrc_reclen);
+		}
+		list_destroy(list);
+		kmem_free(ian, sizeof (itx_async_node_t));
+	}
+	avl_destroy(t);
+
+	kmem_free(itxs, sizeof (itxs_t));
+}
+
+static int
+zil_aitx_compare(const void *x1, const void *x2)
+{
+	const uint64_t o1 = ((itx_async_node_t *)x1)->ia_foid;
+	const uint64_t o2 = ((itx_async_node_t *)x2)->ia_foid;
+
+	if (o1 < o2)
+		return (-1);
+	if (o1 > o2)
+		return (1);
+
+	return (0);
+}
+
+/*
+ * Remove all async itx with the given oid.
+ */
+static void
+zil_remove_async(zilog_t *zilog, uint64_t oid)
+{
+	uint64_t otxg, txg;
+	itx_async_node_t *ian;
+	avl_tree_t *t;
+	avl_index_t where;
+	list_t clean_list;
+	itx_t *itx;
+
+	ASSERT(oid != 0);
+	list_create(&clean_list, sizeof (itx_t), offsetof(itx_t, itx_node));
+
+	if (spa_freeze_txg(zilog->zl_spa) != UINT64_MAX) /* ziltest support */
+		otxg = ZILTEST_TXG;
+	else
+		otxg = spa_last_synced_txg(zilog->zl_spa) + 1;
+
+	for (txg = otxg; txg < (otxg + TXG_CONCURRENT_STATES); txg++) {
+		itxg_t *itxg = &zilog->zl_itxg[txg & TXG_MASK];
+
+		mutex_enter(&itxg->itxg_lock);
+		if (itxg->itxg_txg != txg) {
+			mutex_exit(&itxg->itxg_lock);
+			continue;
+		}
+
+		/*
+		 * Locate the object node and append its list.
+		 */
+		t = &itxg->itxg_itxs->i_async_tree;
+		ian = avl_find(t, &oid, &where);
+		if (ian != NULL)
+			list_move_tail(&clean_list, &ian->ia_list);
+		mutex_exit(&itxg->itxg_lock);
+	}
+	while ((itx = list_head(&clean_list)) != NULL) {
+		list_remove(&clean_list, itx);
+		kmem_free(itx, offsetof(itx_t, itx_lr) +
+		    itx->itx_lr.lrc_reclen);
+	}
+	list_destroy(&clean_list);
+}
+
+void
+zil_itx_assign(zilog_t *zilog, itx_t *itx, dmu_tx_t *tx)
+{
+	uint64_t txg;
+	itxg_t *itxg;
+	itxs_t *itxs, *clean = NULL;
+
+	/*
+	 * Object ids can be re-instantiated in the next txg so
+	 * remove any async transactions to avoid future leaks.
+	 * This can happen if a fsync occurs on the re-instantiated
+	 * object for a WR_INDIRECT or WR_NEED_COPY write, which gets
+	 * the new file data and flushes a write record for the old object.
+	 */
+	if ((itx->itx_lr.lrc_txtype & ~TX_CI) == TX_REMOVE)
+		zil_remove_async(zilog, itx->itx_oid);
+
+	/*
+	 * Ensure the data of a renamed file is committed before the rename.
+	 */
+	if ((itx->itx_lr.lrc_txtype & ~TX_CI) == TX_RENAME)
+		zil_async_to_sync(zilog, itx->itx_oid);
+
+	if (spa_freeze_txg(zilog->zl_spa) !=  UINT64_MAX)
+		txg = ZILTEST_TXG;
+	else
+		txg = dmu_tx_get_txg(tx);
+
+	itxg = &zilog->zl_itxg[txg & TXG_MASK];
+	mutex_enter(&itxg->itxg_lock);
+	itxs = itxg->itxg_itxs;
+	if (itxg->itxg_txg != txg) {
+		if (itxs != NULL) {
+			/*
+			 * The zil_clean callback hasn't got around to cleaning
+			 * this itxg. Save the itxs for release below.
+			 * This should be rare.
+			 */
+			atomic_add_64(&zilog->zl_itx_list_sz, -itxg->itxg_sod);
+			itxg->itxg_sod = 0;
+			clean = itxg->itxg_itxs;
+		}
+		ASSERT(itxg->itxg_sod == 0);
+		itxg->itxg_txg = txg;
+		itxs = itxg->itxg_itxs = kmem_zalloc(sizeof (itxs_t), KM_SLEEP);
+
+		list_create(&itxs->i_sync_list, sizeof (itx_t),
+		    offsetof(itx_t, itx_node));
+		avl_create(&itxs->i_async_tree, zil_aitx_compare,
+		    sizeof (itx_async_node_t),
+		    offsetof(itx_async_node_t, ia_node));
+	}
+	if (itx->itx_sync) {
+		list_insert_tail(&itxs->i_sync_list, itx);
+		atomic_add_64(&zilog->zl_itx_list_sz, itx->itx_sod);
+		itxg->itxg_sod += itx->itx_sod;
+	} else {
+		avl_tree_t *t = &itxs->i_async_tree;
+		uint64_t foid = ((lr_ooo_t *)&itx->itx_lr)->lr_foid;
+		itx_async_node_t *ian;
+		avl_index_t where;
+
+		ian = avl_find(t, &foid, &where);
+		if (ian == NULL) {
+			ian = kmem_alloc(sizeof (itx_async_node_t), KM_SLEEP);
+			list_create(&ian->ia_list, sizeof (itx_t),
+			    offsetof(itx_t, itx_node));
+			ian->ia_foid = foid;
+			avl_insert(t, ian, where);
+		}
+		list_insert_tail(&ian->ia_list, itx);
+	}
+
+	itx->itx_lr.lrc_txg = dmu_tx_get_txg(tx);
+	mutex_exit(&itxg->itxg_lock);
+
+	/* Release the old itxs now we've dropped the lock */
+	if (clean != NULL)
+		zil_itxg_clean(clean);
+}
+
+/*
+ * If there are any in-memory intent log transactions which have now been
+ * synced then start up a taskq to free them.
+ */
+void
+zil_clean(zilog_t *zilog, uint64_t synced_txg)
+{
+	itxg_t *itxg = &zilog->zl_itxg[synced_txg & TXG_MASK];
+	itxs_t *clean_me;
+
+	mutex_enter(&itxg->itxg_lock);
+	if (itxg->itxg_itxs == NULL || itxg->itxg_txg == ZILTEST_TXG) {
+		mutex_exit(&itxg->itxg_lock);
+		return;
+	}
+	ASSERT3U(itxg->itxg_txg, <=, synced_txg);
+	ASSERT(itxg->itxg_txg != 0);
+	ASSERT(zilog->zl_clean_taskq != NULL);
+	atomic_add_64(&zilog->zl_itx_list_sz, -itxg->itxg_sod);
+	itxg->itxg_sod = 0;
+	clean_me = itxg->itxg_itxs;
+	itxg->itxg_itxs = NULL;
+	itxg->itxg_txg = 0;
+	mutex_exit(&itxg->itxg_lock);
+	/*
+	 * Preferably start a task queue to free up the old itxs but
+	 * if taskq_dispatch can't allocate resources to do that then
+	 * free it in-line. This should be rare. Note, using TQ_SLEEP
+	 * created a bad performance problem.
+	 */
+	if (taskq_dispatch(zilog->zl_clean_taskq,
+	    (void (*)(void *))zil_itxg_clean, clean_me, TQ_NOSLEEP) == NULL)
+		zil_itxg_clean(clean_me);
+}
+
+/*
+ * Get the list of itxs to commit into zl_itx_commit_list.
+ */
+static void
+zil_get_commit_list(zilog_t *zilog)
+{
+	uint64_t otxg, txg;
+	list_t *commit_list = &zilog->zl_itx_commit_list;
+	uint64_t push_sod = 0;
+
+	if (spa_freeze_txg(zilog->zl_spa) != UINT64_MAX) /* ziltest support */
+		otxg = ZILTEST_TXG;
+	else
+		otxg = spa_last_synced_txg(zilog->zl_spa) + 1;
+
+	for (txg = otxg; txg < (otxg + TXG_CONCURRENT_STATES); txg++) {
+		itxg_t *itxg = &zilog->zl_itxg[txg & TXG_MASK];
+
+		mutex_enter(&itxg->itxg_lock);
+		if (itxg->itxg_txg != txg) {
+			mutex_exit(&itxg->itxg_lock);
+			continue;
+		}
+
+		list_move_tail(commit_list, &itxg->itxg_itxs->i_sync_list);
+		push_sod += itxg->itxg_sod;
+		itxg->itxg_sod = 0;
+
+		mutex_exit(&itxg->itxg_lock);
+	}
+	atomic_add_64(&zilog->zl_itx_list_sz, -push_sod);
+}
+
+/*
+ * Move the async itxs for a specified object to commit into sync lists.
+ */
+static void
+zil_async_to_sync(zilog_t *zilog, uint64_t foid)
+{
+	uint64_t otxg, txg;
+	itx_async_node_t *ian;
+	avl_tree_t *t;
+	avl_index_t where;
+
+	if (spa_freeze_txg(zilog->zl_spa) != UINT64_MAX) /* ziltest support */
+		otxg = ZILTEST_TXG;
+	else
+		otxg = spa_last_synced_txg(zilog->zl_spa) + 1;
+
+	for (txg = otxg; txg < (otxg + TXG_CONCURRENT_STATES); txg++) {
+		itxg_t *itxg = &zilog->zl_itxg[txg & TXG_MASK];
+
+		mutex_enter(&itxg->itxg_lock);
+		if (itxg->itxg_txg != txg) {
+			mutex_exit(&itxg->itxg_lock);
+			continue;
+		}
+
+		/*
+		 * If a foid is specified then find that node and append its
+		 * list. Otherwise walk the tree appending all the lists
+		 * to the sync list. We add to the end rather than the
+		 * beginning to ensure the create has happened.
+		 */
+		t = &itxg->itxg_itxs->i_async_tree;
+		if (foid != 0) {
+			ian = avl_find(t, &foid, &where);
+			if (ian != NULL) {
+				list_move_tail(&itxg->itxg_itxs->i_sync_list,
+				    &ian->ia_list);
+			}
+		} else {
+			void *cookie = NULL;
+
+			while ((ian = avl_destroy_nodes(t, &cookie)) != NULL) {
+				list_move_tail(&itxg->itxg_itxs->i_sync_list,
+				    &ian->ia_list);
+				list_destroy(&ian->ia_list);
+				kmem_free(ian, sizeof (itx_async_node_t));
+			}
+		}
+		mutex_exit(&itxg->itxg_lock);
+	}
+}
+
+static void
+zil_commit_writer(zilog_t *zilog)
+{
+	uint64_t txg;
+	itx_t *itx;
+	lwb_t *lwb;
+	spa_t *spa = zilog->zl_spa;
+	int error = 0;
+
+	ASSERT(zilog->zl_root_zio == NULL);
+
+	mutex_exit(&zilog->zl_lock);
+
+	zil_get_commit_list(zilog);
+
+	/*
+	 * Return if there's nothing to commit before we dirty the fs by
+	 * calling zil_create().
+	 */
+	if (list_head(&zilog->zl_itx_commit_list) == NULL) {
+		mutex_enter(&zilog->zl_lock);
+		return;
+	}
+
+	if (zilog->zl_suspend) {
+		lwb = NULL;
+	} else {
+		lwb = list_tail(&zilog->zl_lwb_list);
+		if (lwb == NULL)
+			lwb = zil_create(zilog);
+	}
+
+	DTRACE_PROBE1(zil__cw1, zilog_t *, zilog);
+	while (itx = list_head(&zilog->zl_itx_commit_list)) {
+		txg = itx->itx_lr.lrc_txg;
+		ASSERT(txg);
+
+		if (txg > spa_last_synced_txg(spa) || txg > spa_freeze_txg(spa))
+			lwb = zil_lwb_commit(zilog, itx, lwb);
+		list_remove(&zilog->zl_itx_commit_list, itx);
+		kmem_free(itx, offsetof(itx_t, itx_lr)
+		    + itx->itx_lr.lrc_reclen);
+	}
+	DTRACE_PROBE1(zil__cw2, zilog_t *, zilog);
+
+	/* write the last block out */
+	if (lwb != NULL && lwb->lwb_zio != NULL)
+		lwb = zil_lwb_write_start(zilog, lwb);
+
+	zilog->zl_cur_used = 0;
+
+	/*
+	 * Wait if necessary for the log blocks to be on stable storage.
+	 */
+	if (zilog->zl_root_zio) {
+		error = zio_wait(zilog->zl_root_zio);
+		zilog->zl_root_zio = NULL;
+		zil_flush_vdevs(zilog);
+	}
+
+	if (error || lwb == NULL)
+		txg_wait_synced(zilog->zl_dmu_pool, 0);
+
+	mutex_enter(&zilog->zl_lock);
+
+	/*
+	 * Remember the highest committed log sequence number for ztest.
+	 * We only update this value when all the log writes succeeded,
+	 * because ztest wants to ASSERT that it got the whole log chain.
+	 */
+	if (error == 0 && lwb != NULL)
+		zilog->zl_commit_lr_seq = zilog->zl_lr_seq;
+}
+
+/*
+ * Commit zfs transactions to stable storage.
+ * If foid is 0 push out all transactions, otherwise push only those
+ * for that object or might reference that object.
+ *
+ * itxs are committed in batches. In a heavily stressed zil there will be
+ * a commit writer thread who is writing out a bunch of itxs to the log
+ * for a set of committing threads (cthreads) in the same batch as the writer.
+ * Those cthreads are all waiting on the same cv for that batch.
+ *
+ * There will also be a different and growing batch of threads that are
+ * waiting to commit (qthreads). When the committing batch completes
+ * a transition occurs such that the cthreads exit and the qthreads become
+ * cthreads. One of the new cthreads becomes the writer thread for the
+ * batch. Any new threads arriving become new qthreads.
+ *
+ * Only 2 condition variables are needed and there's no transition
+ * between the two cvs needed. They just flip-flop between qthreads
+ * and cthreads.
+ *
+ * Using this scheme we can efficiently wakeup up only those threads
+ * that have been committed.
+ */
+void
+zil_commit(zilog_t *zilog, uint64_t foid)
+{
+	uint64_t mybatch;
+
+	if (zilog->zl_sync == ZFS_SYNC_DISABLED)
+		return;
+
+	/* move the async itxs for the foid to the sync queues */
+	zil_async_to_sync(zilog, foid);
+
+	mutex_enter(&zilog->zl_lock);
+	mybatch = zilog->zl_next_batch;
+	while (zilog->zl_writer) {
+		cv_wait(&zilog->zl_cv_batch[mybatch & 1], &zilog->zl_lock);
+		if (mybatch <= zilog->zl_com_batch) {
+			mutex_exit(&zilog->zl_lock);
+			return;
+		}
+	}
+
+	zilog->zl_next_batch++;
+	zilog->zl_writer = B_TRUE;
+	zil_commit_writer(zilog);
+	zilog->zl_com_batch = mybatch;
+	zilog->zl_writer = B_FALSE;
+	mutex_exit(&zilog->zl_lock);
+
+	/* wake up one thread to become the next writer */
+	cv_signal(&zilog->zl_cv_batch[(mybatch+1) & 1]);
+
+	/* wake up all threads waiting for this batch to be committed */
+	cv_broadcast(&zilog->zl_cv_batch[mybatch & 1]);
+}
+
+/*
+ * Called in syncing context to free committed log blocks and update log header.
+ */
+void
+zil_sync(zilog_t *zilog, dmu_tx_t *tx)
+{
+	zil_header_t *zh = zil_header_in_syncing_context(zilog);
+	uint64_t txg = dmu_tx_get_txg(tx);
+	spa_t *spa = zilog->zl_spa;
+	uint64_t *replayed_seq = &zilog->zl_replayed_seq[txg & TXG_MASK];
+	lwb_t *lwb;
+
+	/*
+	 * We don't zero out zl_destroy_txg, so make sure we don't try
+	 * to destroy it twice.
+	 */
+	if (spa_sync_pass(spa) != 1)
+		return;
+
+	mutex_enter(&zilog->zl_lock);
+
+	ASSERT(zilog->zl_stop_sync == 0);
+
+	if (*replayed_seq != 0) {
+		ASSERT(zh->zh_replay_seq < *replayed_seq);
+		zh->zh_replay_seq = *replayed_seq;
+		*replayed_seq = 0;
+	}
+
+	if (zilog->zl_destroy_txg == txg) {
+		blkptr_t blk = zh->zh_log;
+
+		ASSERT(list_head(&zilog->zl_lwb_list) == NULL);
+
+		bzero(zh, sizeof (zil_header_t));
+		bzero(zilog->zl_replayed_seq, sizeof (zilog->zl_replayed_seq));
+
+		if (zilog->zl_keep_first) {
+			/*
+			 * If this block was part of log chain that couldn't
+			 * be claimed because a device was missing during
+			 * zil_claim(), but that device later returns,
+			 * then this block could erroneously appear valid.
+			 * To guard against this, assign a new GUID to the new
+			 * log chain so it doesn't matter what blk points to.
+			 */
+			zil_init_log_chain(zilog, &blk);
+			zh->zh_log = blk;
+		}
+	}
+
+	while ((lwb = list_head(&zilog->zl_lwb_list)) != NULL) {
+		zh->zh_log = lwb->lwb_blk;
+		if (lwb->lwb_buf != NULL || lwb->lwb_max_txg > txg)
+			break;
+		list_remove(&zilog->zl_lwb_list, lwb);
+		zio_free_zil(spa, txg, &lwb->lwb_blk);
+		kmem_cache_free(zil_lwb_cache, lwb);
+
+		/*
+		 * If we don't have anything left in the lwb list then
+		 * we've had an allocation failure and we need to zero
+		 * out the zil_header blkptr so that we don't end
+		 * up freeing the same block twice.
+		 */
+		if (list_head(&zilog->zl_lwb_list) == NULL)
+			BP_ZERO(&zh->zh_log);
+	}
+	mutex_exit(&zilog->zl_lock);
+}
+
+void
+zil_init(void)
+{
+	zil_lwb_cache = kmem_cache_create("zil_lwb_cache",
+	    sizeof (struct lwb), 0, NULL, NULL, NULL, NULL, NULL, 0);
+}
+
+void
+zil_fini(void)
+{
+	kmem_cache_destroy(zil_lwb_cache);
+}
+
+void
+zil_set_sync(zilog_t *zilog, uint64_t sync)
+{
+	zilog->zl_sync = sync;
+}
+
+void
+zil_set_logbias(zilog_t *zilog, uint64_t logbias)
+{
+	zilog->zl_logbias = logbias;
+}
+
+zilog_t *
+zil_alloc(objset_t *os, zil_header_t *zh_phys)
+{
+	zilog_t *zilog;
+
+	zilog = kmem_zalloc(sizeof (zilog_t), KM_SLEEP);
+
+	zilog->zl_header = zh_phys;
+	zilog->zl_os = os;
+	zilog->zl_spa = dmu_objset_spa(os);
+	zilog->zl_dmu_pool = dmu_objset_pool(os);
+	zilog->zl_destroy_txg = TXG_INITIAL - 1;
+	zilog->zl_logbias = dmu_objset_logbias(os);
+	zilog->zl_sync = dmu_objset_syncprop(os);
+	zilog->zl_next_batch = 1;
+
+	mutex_init(&zilog->zl_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	for (int i = 0; i < TXG_SIZE; i++) {
+		mutex_init(&zilog->zl_itxg[i].itxg_lock, NULL,
+		    MUTEX_DEFAULT, NULL);
+	}
+
+	list_create(&zilog->zl_lwb_list, sizeof (lwb_t),
+	    offsetof(lwb_t, lwb_node));
+
+	list_create(&zilog->zl_itx_commit_list, sizeof (itx_t),
+	    offsetof(itx_t, itx_node));
+
+	mutex_init(&zilog->zl_vdev_lock, NULL, MUTEX_DEFAULT, NULL);
+
+	avl_create(&zilog->zl_vdev_tree, zil_vdev_compare,
+	    sizeof (zil_vdev_node_t), offsetof(zil_vdev_node_t, zv_node));
+
+	cv_init(&zilog->zl_cv_writer, NULL, CV_DEFAULT, NULL);
+	cv_init(&zilog->zl_cv_suspend, NULL, CV_DEFAULT, NULL);
+	cv_init(&zilog->zl_cv_batch[0], NULL, CV_DEFAULT, NULL);
+	cv_init(&zilog->zl_cv_batch[1], NULL, CV_DEFAULT, NULL);
+
+	return (zilog);
+}
+
+void
+zil_free(zilog_t *zilog)
+{
+	lwb_t *head_lwb;
+
+	zilog->zl_stop_sync = 1;
+
+	/*
+	 * After zil_close() there should only be one lwb with a buffer.
+	 */
+	head_lwb = list_head(&zilog->zl_lwb_list);
+	if (head_lwb) {
+		ASSERT(head_lwb == list_tail(&zilog->zl_lwb_list));
+		list_remove(&zilog->zl_lwb_list, head_lwb);
+		zio_buf_free(head_lwb->lwb_buf, head_lwb->lwb_sz);
+		kmem_cache_free(zil_lwb_cache, head_lwb);
+	}
+	list_destroy(&zilog->zl_lwb_list);
+
+	avl_destroy(&zilog->zl_vdev_tree);
+	mutex_destroy(&zilog->zl_vdev_lock);
+
+	ASSERT(list_is_empty(&zilog->zl_itx_commit_list));
+	list_destroy(&zilog->zl_itx_commit_list);
+
+	for (int i = 0; i < TXG_SIZE; i++) {
+		/*
+		 * It's possible for an itx to be generated that doesn't dirty
+		 * a txg (e.g. ztest TX_TRUNCATE). So there's no zil_clean()
+		 * callback to remove the entry. We remove those here.
+		 *
+		 * Also free up the ziltest itxs.
+		 */
+		if (zilog->zl_itxg[i].itxg_itxs)
+			zil_itxg_clean(zilog->zl_itxg[i].itxg_itxs);
+		mutex_destroy(&zilog->zl_itxg[i].itxg_lock);
+	}
+
+	mutex_destroy(&zilog->zl_lock);
+
+	cv_destroy(&zilog->zl_cv_writer);
+	cv_destroy(&zilog->zl_cv_suspend);
+	cv_destroy(&zilog->zl_cv_batch[0]);
+	cv_destroy(&zilog->zl_cv_batch[1]);
+
+	kmem_free(zilog, sizeof (zilog_t));
+}
+
+/*
+ * Open an intent log.
+ */
+zilog_t *
+zil_open(objset_t *os, zil_get_data_t *get_data)
+{
+	zilog_t *zilog = dmu_objset_zil(os);
+
+	zilog->zl_get_data = get_data;
+	zilog->zl_clean_taskq = taskq_create("zil_clean", 1, minclsyspri,
+	    2, 2, TASKQ_PREPOPULATE);
+
+	return (zilog);
+}
+
+/*
+ * Close an intent log.
+ */
+void
+zil_close(zilog_t *zilog)
+{
+	lwb_t *tail_lwb;
+	uint64_t txg = 0;
+
+	zil_commit(zilog, 0); /* commit all itx */
+
+	/*
+	 * The lwb_max_txg for the stubby lwb will reflect the last activity
+	 * for the zil.  After a txg_wait_synced() on the txg we know all the
+	 * callbacks have occurred that may clean the zil.  Only then can we
+	 * destroy the zl_clean_taskq.
+	 */
+	mutex_enter(&zilog->zl_lock);
+	tail_lwb = list_tail(&zilog->zl_lwb_list);
+	if (tail_lwb != NULL)
+		txg = tail_lwb->lwb_max_txg;
+	mutex_exit(&zilog->zl_lock);
+	if (txg)
+		txg_wait_synced(zilog->zl_dmu_pool, txg);
+
+	taskq_destroy(zilog->zl_clean_taskq);
+	zilog->zl_clean_taskq = NULL;
+	zilog->zl_get_data = NULL;
+}
+
+/*
+ * Suspend an intent log.  While in suspended mode, we still honor
+ * synchronous semantics, but we rely on txg_wait_synced() to do it.
+ * We suspend the log briefly when taking a snapshot so that the snapshot
+ * contains all the data it's supposed to, and has an empty intent log.
+ */
+int
+zil_suspend(zilog_t *zilog)
+{
+	const zil_header_t *zh = zilog->zl_header;
+
+	mutex_enter(&zilog->zl_lock);
+	if (zh->zh_flags & ZIL_REPLAY_NEEDED) {		/* unplayed log */
+		mutex_exit(&zilog->zl_lock);
+		return (EBUSY);
+	}
+	if (zilog->zl_suspend++ != 0) {
+		/*
+		 * Someone else already began a suspend.
+		 * Just wait for them to finish.
+		 */
+		while (zilog->zl_suspending)
+			cv_wait(&zilog->zl_cv_suspend, &zilog->zl_lock);
+		mutex_exit(&zilog->zl_lock);
+		return (0);
+	}
+	zilog->zl_suspending = B_TRUE;
+	mutex_exit(&zilog->zl_lock);
+
+	zil_commit(zilog, 0);
+
+	zil_destroy(zilog, B_FALSE);
+
+	mutex_enter(&zilog->zl_lock);
+	zilog->zl_suspending = B_FALSE;
+	cv_broadcast(&zilog->zl_cv_suspend);
+	mutex_exit(&zilog->zl_lock);
+
+	return (0);
+}
+
+void
+zil_resume(zilog_t *zilog)
+{
+	mutex_enter(&zilog->zl_lock);
+	ASSERT(zilog->zl_suspend != 0);
+	zilog->zl_suspend--;
+	mutex_exit(&zilog->zl_lock);
+}
+
+typedef struct zil_replay_arg {
+	zil_replay_func_t **zr_replay;
+	void		*zr_arg;
+	boolean_t	zr_byteswap;
+	char		*zr_lr;
+} zil_replay_arg_t;
+
+static int
+zil_replay_error(zilog_t *zilog, lr_t *lr, int error)
+{
+	char name[MAXNAMELEN];
+
+	zilog->zl_replaying_seq--;	/* didn't actually replay this one */
+
+	dmu_objset_name(zilog->zl_os, name);
+
+	cmn_err(CE_WARN, "ZFS replay transaction error %d, "
+	    "dataset %s, seq 0x%llx, txtype %llu %s\n", error, name,
+	    (u_longlong_t)lr->lrc_seq,
+	    (u_longlong_t)(lr->lrc_txtype & ~TX_CI),
+	    (lr->lrc_txtype & TX_CI) ? "CI" : "");
+
+	return (error);
+}
+
+static int
+zil_replay_log_record(zilog_t *zilog, lr_t *lr, void *zra, uint64_t claim_txg)
+{
+	zil_replay_arg_t *zr = zra;
+	const zil_header_t *zh = zilog->zl_header;
+	uint64_t reclen = lr->lrc_reclen;
+	uint64_t txtype = lr->lrc_txtype;
+	int error = 0;
+
+	zilog->zl_replaying_seq = lr->lrc_seq;
+
+	if (lr->lrc_seq <= zh->zh_replay_seq)	/* already replayed */
+		return (0);
+
+	if (lr->lrc_txg < claim_txg)		/* already committed */
+		return (0);
+
+	/* Strip case-insensitive bit, still present in log record */
+	txtype &= ~TX_CI;
+
+	if (txtype == 0 || txtype >= TX_MAX_TYPE)
+		return (zil_replay_error(zilog, lr, EINVAL));
+
+	/*
+	 * If this record type can be logged out of order, the object
+	 * (lr_foid) may no longer exist.  That's legitimate, not an error.
+	 */
+	if (TX_OOO(txtype)) {
+		error = dmu_object_info(zilog->zl_os,
+		    ((lr_ooo_t *)lr)->lr_foid, NULL);
+		if (error == ENOENT || error == EEXIST)
+			return (0);
+	}
+
+	/*
+	 * Make a copy of the data so we can revise and extend it.
+	 */
+	bcopy(lr, zr->zr_lr, reclen);
+
+	/*
+	 * If this is a TX_WRITE with a blkptr, suck in the data.
+	 */
+	if (txtype == TX_WRITE && reclen == sizeof (lr_write_t)) {
+		error = zil_read_log_data(zilog, (lr_write_t *)lr,
+		    zr->zr_lr + reclen);
+		if (error)
+			return (zil_replay_error(zilog, lr, error));
+	}
+
+	/*
+	 * The log block containing this lr may have been byteswapped
+	 * so that we can easily examine common fields like lrc_txtype.
+	 * However, the log is a mix of different record types, and only the
+	 * replay vectors know how to byteswap their records.  Therefore, if
+	 * the lr was byteswapped, undo it before invoking the replay vector.
+	 */
+	if (zr->zr_byteswap)
+		byteswap_uint64_array(zr->zr_lr, reclen);
+
+	/*
+	 * We must now do two things atomically: replay this log record,
+	 * and update the log header sequence number to reflect the fact that
+	 * we did so. At the end of each replay function the sequence number
+	 * is updated if we are in replay mode.
+	 */
+	error = zr->zr_replay[txtype](zr->zr_arg, zr->zr_lr, zr->zr_byteswap);
+	if (error) {
+		/*
+		 * The DMU's dnode layer doesn't see removes until the txg
+		 * commits, so a subsequent claim can spuriously fail with
+		 * EEXIST. So if we receive any error we try syncing out
+		 * any removes then retry the transaction.  Note that we
+		 * specify B_FALSE for byteswap now, so we don't do it twice.
+		 */
+		txg_wait_synced(spa_get_dsl(zilog->zl_spa), 0);
+		error = zr->zr_replay[txtype](zr->zr_arg, zr->zr_lr, B_FALSE);
+		if (error)
+			return (zil_replay_error(zilog, lr, error));
+	}
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+zil_incr_blks(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg)
+{
+	zilog->zl_replay_blks++;
+
+	return (0);
+}
+
+/*
+ * If this dataset has a non-empty intent log, replay it and destroy it.
+ */
+void
+zil_replay(objset_t *os, void *arg, zil_replay_func_t *replay_func[TX_MAX_TYPE])
+{
+	zilog_t *zilog = dmu_objset_zil(os);
+	const zil_header_t *zh = zilog->zl_header;
+	zil_replay_arg_t zr;
+
+	if ((zh->zh_flags & ZIL_REPLAY_NEEDED) == 0) {
+		zil_destroy(zilog, B_TRUE);
+		return;
+	}
+
+	zr.zr_replay = replay_func;
+	zr.zr_arg = arg;
+	zr.zr_byteswap = BP_SHOULD_BYTESWAP(&zh->zh_log);
+	zr.zr_lr = kmem_alloc(2 * SPA_MAXBLOCKSIZE, KM_SLEEP);
+
+	/*
+	 * Wait for in-progress removes to sync before starting replay.
+	 */
+	txg_wait_synced(zilog->zl_dmu_pool, 0);
+
+	zilog->zl_replay = B_TRUE;
+	zilog->zl_replay_time = ddi_get_lbolt();
+	ASSERT(zilog->zl_replay_blks == 0);
+	(void) zil_parse(zilog, zil_incr_blks, zil_replay_log_record, &zr,
+	    zh->zh_claim_txg);
+	kmem_free(zr.zr_lr, 2 * SPA_MAXBLOCKSIZE);
+
+	zil_destroy(zilog, B_FALSE);
+	txg_wait_synced(zilog->zl_dmu_pool, zilog->zl_destroy_txg);
+	zilog->zl_replay = B_FALSE;
+}
+
+boolean_t
+zil_replaying(zilog_t *zilog, dmu_tx_t *tx)
+{
+	if (zilog->zl_sync == ZFS_SYNC_DISABLED)
+		return (B_TRUE);
+
+	if (zilog->zl_replay) {
+		dsl_dataset_dirty(dmu_objset_ds(zilog->zl_os), tx);
+		zilog->zl_replayed_seq[dmu_tx_get_txg(tx) & TXG_MASK] =
+		    zilog->zl_replaying_seq;
+		return (B_TRUE);
+	}
+
+	return (B_FALSE);
+}
+
+/* ARGSUSED */
+int
+zil_vdev_offline(const char *osname, void *arg)
+{
+	objset_t *os;
+	zilog_t *zilog;
+	int error;
+
+	error = dmu_objset_hold(osname, FTAG, &os);
+	if (error)
+		return (error);
+
+	zilog = dmu_objset_zil(os);
+	if (zil_suspend(zilog) != 0)
+		error = EEXIST;
+	else
+		zil_resume(zilog);
+	dmu_objset_rele(os, FTAG);
+	return (error);
+}
diff --git a/uts/common/fs/zfs/zio.c b/uts/common/fs/zfs/zio.c
new file mode 100644
index 000000000000..eb509c5911f7
--- /dev/null
+++ b/uts/common/fs/zfs/zio.c
@@ -0,0 +1,2952 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/fm/fs/zfs.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/spa_impl.h>
+#include <sys/vdev_impl.h>
+#include <sys/zio_impl.h>
+#include <sys/zio_compress.h>
+#include <sys/zio_checksum.h>
+#include <sys/dmu_objset.h>
+#include <sys/arc.h>
+#include <sys/ddt.h>
+
+/*
+ * ==========================================================================
+ * I/O priority table
+ * ==========================================================================
+ */
+uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE] = {
+	0,	/* ZIO_PRIORITY_NOW		*/
+	0,	/* ZIO_PRIORITY_SYNC_READ	*/
+	0,	/* ZIO_PRIORITY_SYNC_WRITE	*/
+	0,	/* ZIO_PRIORITY_LOG_WRITE	*/
+	1,	/* ZIO_PRIORITY_CACHE_FILL	*/
+	1,	/* ZIO_PRIORITY_AGG		*/
+	4,	/* ZIO_PRIORITY_FREE		*/
+	4,	/* ZIO_PRIORITY_ASYNC_WRITE	*/
+	6,	/* ZIO_PRIORITY_ASYNC_READ	*/
+	10,	/* ZIO_PRIORITY_RESILVER	*/
+	20,	/* ZIO_PRIORITY_SCRUB		*/
+	2,	/* ZIO_PRIORITY_DDT_PREFETCH	*/
+};
+
+/*
+ * ==========================================================================
+ * I/O type descriptions
+ * ==========================================================================
+ */
+char *zio_type_name[ZIO_TYPES] = {
+	"zio_null", "zio_read", "zio_write", "zio_free", "zio_claim",
+	"zio_ioctl"
+};
+
+/*
+ * ==========================================================================
+ * I/O kmem caches
+ * ==========================================================================
+ */
+kmem_cache_t *zio_cache;
+kmem_cache_t *zio_link_cache;
+kmem_cache_t *zio_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
+kmem_cache_t *zio_data_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
+
+#ifdef _KERNEL
+extern vmem_t *zio_alloc_arena;
+#endif
+
+/*
+ * An allocating zio is one that either currently has the DVA allocate
+ * stage set or will have it later in its lifetime.
+ */
+#define	IO_IS_ALLOCATING(zio) ((zio)->io_orig_pipeline & ZIO_STAGE_DVA_ALLOCATE)
+
+boolean_t	zio_requeue_io_start_cut_in_line = B_TRUE;
+
+#ifdef ZFS_DEBUG
+int zio_buf_debug_limit = 16384;
+#else
+int zio_buf_debug_limit = 0;
+#endif
+
+void
+zio_init(void)
+{
+	size_t c;
+	vmem_t *data_alloc_arena = NULL;
+
+#ifdef _KERNEL
+	data_alloc_arena = zio_alloc_arena;
+#endif
+	zio_cache = kmem_cache_create("zio_cache",
+	    sizeof (zio_t), 0, NULL, NULL, NULL, NULL, NULL, 0);
+	zio_link_cache = kmem_cache_create("zio_link_cache",
+	    sizeof (zio_link_t), 0, NULL, NULL, NULL, NULL, NULL, 0);
+
+	/*
+	 * For small buffers, we want a cache for each multiple of
+	 * SPA_MINBLOCKSIZE.  For medium-size buffers, we want a cache
+	 * for each quarter-power of 2.  For large buffers, we want
+	 * a cache for each multiple of PAGESIZE.
+	 */
+	for (c = 0; c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; c++) {
+		size_t size = (c + 1) << SPA_MINBLOCKSHIFT;
+		size_t p2 = size;
+		size_t align = 0;
+		size_t cflags = (size > zio_buf_debug_limit) ? KMC_NODEBUG : 0;
+
+		while (p2 & (p2 - 1))
+			p2 &= p2 - 1;
+
+		if (size <= 4 * SPA_MINBLOCKSIZE) {
+			align = SPA_MINBLOCKSIZE;
+		} else if (P2PHASE(size, PAGESIZE) == 0) {
+			align = PAGESIZE;
+		} else if (P2PHASE(size, p2 >> 2) == 0) {
+			align = p2 >> 2;
+		}
+
+		if (align != 0) {
+			char name[36];
+			(void) sprintf(name, "zio_buf_%lu", (ulong_t)size);
+			zio_buf_cache[c] = kmem_cache_create(name, size,
+			    align, NULL, NULL, NULL, NULL, NULL, cflags);
+
+			/*
+			 * Since zio_data bufs do not appear in crash dumps, we
+			 * pass KMC_NOTOUCH so that no allocator metadata is
+			 * stored with the buffers.
+			 */
+			(void) sprintf(name, "zio_data_buf_%lu", (ulong_t)size);
+			zio_data_buf_cache[c] = kmem_cache_create(name, size,
+			    align, NULL, NULL, NULL, NULL, data_alloc_arena,
+			    cflags | KMC_NOTOUCH);
+		}
+	}
+
+	while (--c != 0) {
+		ASSERT(zio_buf_cache[c] != NULL);
+		if (zio_buf_cache[c - 1] == NULL)
+			zio_buf_cache[c - 1] = zio_buf_cache[c];
+
+		ASSERT(zio_data_buf_cache[c] != NULL);
+		if (zio_data_buf_cache[c - 1] == NULL)
+			zio_data_buf_cache[c - 1] = zio_data_buf_cache[c];
+	}
+
+	zio_inject_init();
+}
+
+void
+zio_fini(void)
+{
+	size_t c;
+	kmem_cache_t *last_cache = NULL;
+	kmem_cache_t *last_data_cache = NULL;
+
+	for (c = 0; c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; c++) {
+		if (zio_buf_cache[c] != last_cache) {
+			last_cache = zio_buf_cache[c];
+			kmem_cache_destroy(zio_buf_cache[c]);
+		}
+		zio_buf_cache[c] = NULL;
+
+		if (zio_data_buf_cache[c] != last_data_cache) {
+			last_data_cache = zio_data_buf_cache[c];
+			kmem_cache_destroy(zio_data_buf_cache[c]);
+		}
+		zio_data_buf_cache[c] = NULL;
+	}
+
+	kmem_cache_destroy(zio_link_cache);
+	kmem_cache_destroy(zio_cache);
+
+	zio_inject_fini();
+}
+
+/*
+ * ==========================================================================
+ * Allocate and free I/O buffers
+ * ==========================================================================
+ */
+
+/*
+ * Use zio_buf_alloc to allocate ZFS metadata.  This data will appear in a
+ * crashdump if the kernel panics, so use it judiciously.  Obviously, it's
+ * useful to inspect ZFS metadata, but if possible, we should avoid keeping
+ * excess / transient data in-core during a crashdump.
+ */
+void *
+zio_buf_alloc(size_t size)
+{
+	size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
+
+	ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
+
+	return (kmem_cache_alloc(zio_buf_cache[c], KM_PUSHPAGE));
+}
+
+/*
+ * Use zio_data_buf_alloc to allocate data.  The data will not appear in a
+ * crashdump if the kernel panics.  This exists so that we will limit the amount
+ * of ZFS data that shows up in a kernel crashdump.  (Thus reducing the amount
+ * of kernel heap dumped to disk when the kernel panics)
+ */
+void *
+zio_data_buf_alloc(size_t size)
+{
+	size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
+
+	ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
+
+	return (kmem_cache_alloc(zio_data_buf_cache[c], KM_PUSHPAGE));
+}
+
+void
+zio_buf_free(void *buf, size_t size)
+{
+	size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
+
+	ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
+
+	kmem_cache_free(zio_buf_cache[c], buf);
+}
+
+void
+zio_data_buf_free(void *buf, size_t size)
+{
+	size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
+
+	ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
+
+	kmem_cache_free(zio_data_buf_cache[c], buf);
+}
+
+/*
+ * ==========================================================================
+ * Push and pop I/O transform buffers
+ * ==========================================================================
+ */
+static void
+zio_push_transform(zio_t *zio, void *data, uint64_t size, uint64_t bufsize,
+	zio_transform_func_t *transform)
+{
+	zio_transform_t *zt = kmem_alloc(sizeof (zio_transform_t), KM_SLEEP);
+
+	zt->zt_orig_data = zio->io_data;
+	zt->zt_orig_size = zio->io_size;
+	zt->zt_bufsize = bufsize;
+	zt->zt_transform = transform;
+
+	zt->zt_next = zio->io_transform_stack;
+	zio->io_transform_stack = zt;
+
+	zio->io_data = data;
+	zio->io_size = size;
+}
+
+static void
+zio_pop_transforms(zio_t *zio)
+{
+	zio_transform_t *zt;
+
+	while ((zt = zio->io_transform_stack) != NULL) {
+		if (zt->zt_transform != NULL)
+			zt->zt_transform(zio,
+			    zt->zt_orig_data, zt->zt_orig_size);
+
+		if (zt->zt_bufsize != 0)
+			zio_buf_free(zio->io_data, zt->zt_bufsize);
+
+		zio->io_data = zt->zt_orig_data;
+		zio->io_size = zt->zt_orig_size;
+		zio->io_transform_stack = zt->zt_next;
+
+		kmem_free(zt, sizeof (zio_transform_t));
+	}
+}
+
+/*
+ * ==========================================================================
+ * I/O transform callbacks for subblocks and decompression
+ * ==========================================================================
+ */
+static void
+zio_subblock(zio_t *zio, void *data, uint64_t size)
+{
+	ASSERT(zio->io_size > size);
+
+	if (zio->io_type == ZIO_TYPE_READ)
+		bcopy(zio->io_data, data, size);
+}
+
+static void
+zio_decompress(zio_t *zio, void *data, uint64_t size)
+{
+	if (zio->io_error == 0 &&
+	    zio_decompress_data(BP_GET_COMPRESS(zio->io_bp),
+	    zio->io_data, data, zio->io_size, size) != 0)
+		zio->io_error = EIO;
+}
+
+/*
+ * ==========================================================================
+ * I/O parent/child relationships and pipeline interlocks
+ * ==========================================================================
+ */
+/*
+ * NOTE - Callers to zio_walk_parents() and zio_walk_children must
+ *        continue calling these functions until they return NULL.
+ *        Otherwise, the next caller will pick up the list walk in
+ *        some indeterminate state.  (Otherwise every caller would
+ *        have to pass in a cookie to keep the state represented by
+ *        io_walk_link, which gets annoying.)
+ */
+zio_t *
+zio_walk_parents(zio_t *cio)
+{
+	zio_link_t *zl = cio->io_walk_link;
+	list_t *pl = &cio->io_parent_list;
+
+	zl = (zl == NULL) ? list_head(pl) : list_next(pl, zl);
+	cio->io_walk_link = zl;
+
+	if (zl == NULL)
+		return (NULL);
+
+	ASSERT(zl->zl_child == cio);
+	return (zl->zl_parent);
+}
+
+zio_t *
+zio_walk_children(zio_t *pio)
+{
+	zio_link_t *zl = pio->io_walk_link;
+	list_t *cl = &pio->io_child_list;
+
+	zl = (zl == NULL) ? list_head(cl) : list_next(cl, zl);
+	pio->io_walk_link = zl;
+
+	if (zl == NULL)
+		return (NULL);
+
+	ASSERT(zl->zl_parent == pio);
+	return (zl->zl_child);
+}
+
+zio_t *
+zio_unique_parent(zio_t *cio)
+{
+	zio_t *pio = zio_walk_parents(cio);
+
+	VERIFY(zio_walk_parents(cio) == NULL);
+	return (pio);
+}
+
+void
+zio_add_child(zio_t *pio, zio_t *cio)
+{
+	zio_link_t *zl = kmem_cache_alloc(zio_link_cache, KM_SLEEP);
+
+	/*
+	 * Logical I/Os can have logical, gang, or vdev children.
+	 * Gang I/Os can have gang or vdev children.
+	 * Vdev I/Os can only have vdev children.
+	 * The following ASSERT captures all of these constraints.
+	 */
+	ASSERT(cio->io_child_type <= pio->io_child_type);
+
+	zl->zl_parent = pio;
+	zl->zl_child = cio;
+
+	mutex_enter(&cio->io_lock);
+	mutex_enter(&pio->io_lock);
+
+	ASSERT(pio->io_state[ZIO_WAIT_DONE] == 0);
+
+	for (int w = 0; w < ZIO_WAIT_TYPES; w++)
+		pio->io_children[cio->io_child_type][w] += !cio->io_state[w];
+
+	list_insert_head(&pio->io_child_list, zl);
+	list_insert_head(&cio->io_parent_list, zl);
+
+	pio->io_child_count++;
+	cio->io_parent_count++;
+
+	mutex_exit(&pio->io_lock);
+	mutex_exit(&cio->io_lock);
+}
+
+static void
+zio_remove_child(zio_t *pio, zio_t *cio, zio_link_t *zl)
+{
+	ASSERT(zl->zl_parent == pio);
+	ASSERT(zl->zl_child == cio);
+
+	mutex_enter(&cio->io_lock);
+	mutex_enter(&pio->io_lock);
+
+	list_remove(&pio->io_child_list, zl);
+	list_remove(&cio->io_parent_list, zl);
+
+	pio->io_child_count--;
+	cio->io_parent_count--;
+
+	mutex_exit(&pio->io_lock);
+	mutex_exit(&cio->io_lock);
+
+	kmem_cache_free(zio_link_cache, zl);
+}
+
+static boolean_t
+zio_wait_for_children(zio_t *zio, enum zio_child child, enum zio_wait_type wait)
+{
+	uint64_t *countp = &zio->io_children[child][wait];
+	boolean_t waiting = B_FALSE;
+
+	mutex_enter(&zio->io_lock);
+	ASSERT(zio->io_stall == NULL);
+	if (*countp != 0) {
+		zio->io_stage >>= 1;
+		zio->io_stall = countp;
+		waiting = B_TRUE;
+	}
+	mutex_exit(&zio->io_lock);
+
+	return (waiting);
+}
+
+static void
+zio_notify_parent(zio_t *pio, zio_t *zio, enum zio_wait_type wait)
+{
+	uint64_t *countp = &pio->io_children[zio->io_child_type][wait];
+	int *errorp = &pio->io_child_error[zio->io_child_type];
+
+	mutex_enter(&pio->io_lock);
+	if (zio->io_error && !(zio->io_flags & ZIO_FLAG_DONT_PROPAGATE))
+		*errorp = zio_worst_error(*errorp, zio->io_error);
+	pio->io_reexecute |= zio->io_reexecute;
+	ASSERT3U(*countp, >, 0);
+	if (--*countp == 0 && pio->io_stall == countp) {
+		pio->io_stall = NULL;
+		mutex_exit(&pio->io_lock);
+		zio_execute(pio);
+	} else {
+		mutex_exit(&pio->io_lock);
+	}
+}
+
+static void
+zio_inherit_child_errors(zio_t *zio, enum zio_child c)
+{
+	if (zio->io_child_error[c] != 0 && zio->io_error == 0)
+		zio->io_error = zio->io_child_error[c];
+}
+
+/*
+ * ==========================================================================
+ * Create the various types of I/O (read, write, free, etc)
+ * ==========================================================================
+ */
+static zio_t *
+zio_create(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp,
+    void *data, uint64_t size, zio_done_func_t *done, void *private,
+    zio_type_t type, int priority, enum zio_flag flags,
+    vdev_t *vd, uint64_t offset, const zbookmark_t *zb,
+    enum zio_stage stage, enum zio_stage pipeline)
+{
+	zio_t *zio;
+
+	ASSERT3U(size, <=, SPA_MAXBLOCKSIZE);
+	ASSERT(P2PHASE(size, SPA_MINBLOCKSIZE) == 0);
+	ASSERT(P2PHASE(offset, SPA_MINBLOCKSIZE) == 0);
+
+	ASSERT(!vd || spa_config_held(spa, SCL_STATE_ALL, RW_READER));
+	ASSERT(!bp || !(flags & ZIO_FLAG_CONFIG_WRITER));
+	ASSERT(vd || stage == ZIO_STAGE_OPEN);
+
+	zio = kmem_cache_alloc(zio_cache, KM_SLEEP);
+	bzero(zio, sizeof (zio_t));
+
+	mutex_init(&zio->io_lock, NULL, MUTEX_DEFAULT, NULL);
+	cv_init(&zio->io_cv, NULL, CV_DEFAULT, NULL);
+
+	list_create(&zio->io_parent_list, sizeof (zio_link_t),
+	    offsetof(zio_link_t, zl_parent_node));
+	list_create(&zio->io_child_list, sizeof (zio_link_t),
+	    offsetof(zio_link_t, zl_child_node));
+
+	if (vd != NULL)
+		zio->io_child_type = ZIO_CHILD_VDEV;
+	else if (flags & ZIO_FLAG_GANG_CHILD)
+		zio->io_child_type = ZIO_CHILD_GANG;
+	else if (flags & ZIO_FLAG_DDT_CHILD)
+		zio->io_child_type = ZIO_CHILD_DDT;
+	else
+		zio->io_child_type = ZIO_CHILD_LOGICAL;
+
+	if (bp != NULL) {
+		zio->io_bp = (blkptr_t *)bp;
+		zio->io_bp_copy = *bp;
+		zio->io_bp_orig = *bp;
+		if (type != ZIO_TYPE_WRITE ||
+		    zio->io_child_type == ZIO_CHILD_DDT)
+			zio->io_bp = &zio->io_bp_copy;	/* so caller can free */
+		if (zio->io_child_type == ZIO_CHILD_LOGICAL)
+			zio->io_logical = zio;
+		if (zio->io_child_type > ZIO_CHILD_GANG && BP_IS_GANG(bp))
+			pipeline |= ZIO_GANG_STAGES;
+	}
+
+	zio->io_spa = spa;
+	zio->io_txg = txg;
+	zio->io_done = done;
+	zio->io_private = private;
+	zio->io_type = type;
+	zio->io_priority = priority;
+	zio->io_vd = vd;
+	zio->io_offset = offset;
+	zio->io_orig_data = zio->io_data = data;
+	zio->io_orig_size = zio->io_size = size;
+	zio->io_orig_flags = zio->io_flags = flags;
+	zio->io_orig_stage = zio->io_stage = stage;
+	zio->io_orig_pipeline = zio->io_pipeline = pipeline;
+
+	zio->io_state[ZIO_WAIT_READY] = (stage >= ZIO_STAGE_READY);
+	zio->io_state[ZIO_WAIT_DONE] = (stage >= ZIO_STAGE_DONE);
+
+	if (zb != NULL)
+		zio->io_bookmark = *zb;
+
+	if (pio != NULL) {
+		if (zio->io_logical == NULL)
+			zio->io_logical = pio->io_logical;
+		if (zio->io_child_type == ZIO_CHILD_GANG)
+			zio->io_gang_leader = pio->io_gang_leader;
+		zio_add_child(pio, zio);
+	}
+
+	return (zio);
+}
+
+static void
+zio_destroy(zio_t *zio)
+{
+	list_destroy(&zio->io_parent_list);
+	list_destroy(&zio->io_child_list);
+	mutex_destroy(&zio->io_lock);
+	cv_destroy(&zio->io_cv);
+	kmem_cache_free(zio_cache, zio);
+}
+
+zio_t *
+zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, zio_done_func_t *done,
+    void *private, enum zio_flag flags)
+{
+	zio_t *zio;
+
+	zio = zio_create(pio, spa, 0, NULL, NULL, 0, done, private,
+	    ZIO_TYPE_NULL, ZIO_PRIORITY_NOW, flags, vd, 0, NULL,
+	    ZIO_STAGE_OPEN, ZIO_INTERLOCK_PIPELINE);
+
+	return (zio);
+}
+
+zio_t *
+zio_root(spa_t *spa, zio_done_func_t *done, void *private, enum zio_flag flags)
+{
+	return (zio_null(NULL, spa, NULL, done, private, flags));
+}
+
+zio_t *
+zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
+    void *data, uint64_t size, zio_done_func_t *done, void *private,
+    int priority, enum zio_flag flags, const zbookmark_t *zb)
+{
+	zio_t *zio;
+
+	zio = zio_create(pio, spa, BP_PHYSICAL_BIRTH(bp), bp,
+	    data, size, done, private,
+	    ZIO_TYPE_READ, priority, flags, NULL, 0, zb,
+	    ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ?
+	    ZIO_DDT_CHILD_READ_PIPELINE : ZIO_READ_PIPELINE);
+
+	return (zio);
+}
+
+zio_t *
+zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
+    void *data, uint64_t size, const zio_prop_t *zp,
+    zio_done_func_t *ready, zio_done_func_t *done, void *private,
+    int priority, enum zio_flag flags, const zbookmark_t *zb)
+{
+	zio_t *zio;
+
+	ASSERT(zp->zp_checksum >= ZIO_CHECKSUM_OFF &&
+	    zp->zp_checksum < ZIO_CHECKSUM_FUNCTIONS &&
+	    zp->zp_compress >= ZIO_COMPRESS_OFF &&
+	    zp->zp_compress < ZIO_COMPRESS_FUNCTIONS &&
+	    zp->zp_type < DMU_OT_NUMTYPES &&
+	    zp->zp_level < 32 &&
+	    zp->zp_copies > 0 &&
+	    zp->zp_copies <= spa_max_replication(spa) &&
+	    zp->zp_dedup <= 1 &&
+	    zp->zp_dedup_verify <= 1);
+
+	zio = zio_create(pio, spa, txg, bp, data, size, done, private,
+	    ZIO_TYPE_WRITE, priority, flags, NULL, 0, zb,
+	    ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ?
+	    ZIO_DDT_CHILD_WRITE_PIPELINE : ZIO_WRITE_PIPELINE);
+
+	zio->io_ready = ready;
+	zio->io_prop = *zp;
+
+	return (zio);
+}
+
+zio_t *
+zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, void *data,
+    uint64_t size, zio_done_func_t *done, void *private, int priority,
+    enum zio_flag flags, zbookmark_t *zb)
+{
+	zio_t *zio;
+
+	zio = zio_create(pio, spa, txg, bp, data, size, done, private,
+	    ZIO_TYPE_WRITE, priority, flags, NULL, 0, zb,
+	    ZIO_STAGE_OPEN, ZIO_REWRITE_PIPELINE);
+
+	return (zio);
+}
+
+void
+zio_write_override(zio_t *zio, blkptr_t *bp, int copies)
+{
+	ASSERT(zio->io_type == ZIO_TYPE_WRITE);
+	ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+	ASSERT(zio->io_stage == ZIO_STAGE_OPEN);
+	ASSERT(zio->io_txg == spa_syncing_txg(zio->io_spa));
+
+	zio->io_prop.zp_copies = copies;
+	zio->io_bp_override = bp;
+}
+
+void
+zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp)
+{
+	bplist_append(&spa->spa_free_bplist[txg & TXG_MASK], bp);
+}
+
+zio_t *
+zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp,
+    enum zio_flag flags)
+{
+	zio_t *zio;
+
+	dprintf_bp(bp, "freeing in txg %llu, pass %u",
+	    (longlong_t)txg, spa->spa_sync_pass);
+
+	ASSERT(!BP_IS_HOLE(bp));
+	ASSERT(spa_syncing_txg(spa) == txg);
+	ASSERT(spa_sync_pass(spa) <= SYNC_PASS_DEFERRED_FREE);
+
+	zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp),
+	    NULL, NULL, ZIO_TYPE_FREE, ZIO_PRIORITY_FREE, flags,
+	    NULL, 0, NULL, ZIO_STAGE_OPEN, ZIO_FREE_PIPELINE);
+
+	return (zio);
+}
+
+zio_t *
+zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp,
+    zio_done_func_t *done, void *private, enum zio_flag flags)
+{
+	zio_t *zio;
+
+	/*
+	 * A claim is an allocation of a specific block.  Claims are needed
+	 * to support immediate writes in the intent log.  The issue is that
+	 * immediate writes contain committed data, but in a txg that was
+	 * *not* committed.  Upon opening the pool after an unclean shutdown,
+	 * the intent log claims all blocks that contain immediate write data
+	 * so that the SPA knows they're in use.
+	 *
+	 * All claims *must* be resolved in the first txg -- before the SPA
+	 * starts allocating blocks -- so that nothing is allocated twice.
+	 * If txg == 0 we just verify that the block is claimable.
+	 */
+	ASSERT3U(spa->spa_uberblock.ub_rootbp.blk_birth, <, spa_first_txg(spa));
+	ASSERT(txg == spa_first_txg(spa) || txg == 0);
+	ASSERT(!BP_GET_DEDUP(bp) || !spa_writeable(spa));	/* zdb(1M) */
+
+	zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp),
+	    done, private, ZIO_TYPE_CLAIM, ZIO_PRIORITY_NOW, flags,
+	    NULL, 0, NULL, ZIO_STAGE_OPEN, ZIO_CLAIM_PIPELINE);
+
+	return (zio);
+}
+
+zio_t *
+zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
+    zio_done_func_t *done, void *private, int priority, enum zio_flag flags)
+{
+	zio_t *zio;
+	int c;
+
+	if (vd->vdev_children == 0) {
+		zio = zio_create(pio, spa, 0, NULL, NULL, 0, done, private,
+		    ZIO_TYPE_IOCTL, priority, flags, vd, 0, NULL,
+		    ZIO_STAGE_OPEN, ZIO_IOCTL_PIPELINE);
+
+		zio->io_cmd = cmd;
+	} else {
+		zio = zio_null(pio, spa, NULL, NULL, NULL, flags);
+
+		for (c = 0; c < vd->vdev_children; c++)
+			zio_nowait(zio_ioctl(zio, spa, vd->vdev_child[c], cmd,
+			    done, private, priority, flags));
+	}
+
+	return (zio);
+}
+
+zio_t *
+zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size,
+    void *data, int checksum, zio_done_func_t *done, void *private,
+    int priority, enum zio_flag flags, boolean_t labels)
+{
+	zio_t *zio;
+
+	ASSERT(vd->vdev_children == 0);
+	ASSERT(!labels || offset + size <= VDEV_LABEL_START_SIZE ||
+	    offset >= vd->vdev_psize - VDEV_LABEL_END_SIZE);
+	ASSERT3U(offset + size, <=, vd->vdev_psize);
+
+	zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, done, private,
+	    ZIO_TYPE_READ, priority, flags, vd, offset, NULL,
+	    ZIO_STAGE_OPEN, ZIO_READ_PHYS_PIPELINE);
+
+	zio->io_prop.zp_checksum = checksum;
+
+	return (zio);
+}
+
+zio_t *
+zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size,
+    void *data, int checksum, zio_done_func_t *done, void *private,
+    int priority, enum zio_flag flags, boolean_t labels)
+{
+	zio_t *zio;
+
+	ASSERT(vd->vdev_children == 0);
+	ASSERT(!labels || offset + size <= VDEV_LABEL_START_SIZE ||
+	    offset >= vd->vdev_psize - VDEV_LABEL_END_SIZE);
+	ASSERT3U(offset + size, <=, vd->vdev_psize);
+
+	zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, done, private,
+	    ZIO_TYPE_WRITE, priority, flags, vd, offset, NULL,
+	    ZIO_STAGE_OPEN, ZIO_WRITE_PHYS_PIPELINE);
+
+	zio->io_prop.zp_checksum = checksum;
+
+	if (zio_checksum_table[checksum].ci_eck) {
+		/*
+		 * zec checksums are necessarily destructive -- they modify
+		 * the end of the write buffer to hold the verifier/checksum.
+		 * Therefore, we must make a local copy in case the data is
+		 * being written to multiple places in parallel.
+		 */
+		void *wbuf = zio_buf_alloc(size);
+		bcopy(data, wbuf, size);
+		zio_push_transform(zio, wbuf, size, size, NULL);
+	}
+
+	return (zio);
+}
+
+/*
+ * Create a child I/O to do some work for us.
+ */
+zio_t *
+zio_vdev_child_io(zio_t *pio, blkptr_t *bp, vdev_t *vd, uint64_t offset,
+	void *data, uint64_t size, int type, int priority, enum zio_flag flags,
+	zio_done_func_t *done, void *private)
+{
+	enum zio_stage pipeline = ZIO_VDEV_CHILD_PIPELINE;
+	zio_t *zio;
+
+	ASSERT(vd->vdev_parent ==
+	    (pio->io_vd ? pio->io_vd : pio->io_spa->spa_root_vdev));
+
+	if (type == ZIO_TYPE_READ && bp != NULL) {
+		/*
+		 * If we have the bp, then the child should perform the
+		 * checksum and the parent need not.  This pushes error
+		 * detection as close to the leaves as possible and
+		 * eliminates redundant checksums in the interior nodes.
+		 */
+		pipeline |= ZIO_STAGE_CHECKSUM_VERIFY;
+		pio->io_pipeline &= ~ZIO_STAGE_CHECKSUM_VERIFY;
+	}
+
+	if (vd->vdev_children == 0)
+		offset += VDEV_LABEL_START_SIZE;
+
+	flags |= ZIO_VDEV_CHILD_FLAGS(pio) | ZIO_FLAG_DONT_PROPAGATE;
+
+	/*
+	 * If we've decided to do a repair, the write is not speculative --
+	 * even if the original read was.
+	 */
+	if (flags & ZIO_FLAG_IO_REPAIR)
+		flags &= ~ZIO_FLAG_SPECULATIVE;
+
+	zio = zio_create(pio, pio->io_spa, pio->io_txg, bp, data, size,
+	    done, private, type, priority, flags, vd, offset, &pio->io_bookmark,
+	    ZIO_STAGE_VDEV_IO_START >> 1, pipeline);
+
+	return (zio);
+}
+
+zio_t *
+zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, void *data, uint64_t size,
+	int type, int priority, enum zio_flag flags,
+	zio_done_func_t *done, void *private)
+{
+	zio_t *zio;
+
+	ASSERT(vd->vdev_ops->vdev_op_leaf);
+
+	zio = zio_create(NULL, vd->vdev_spa, 0, NULL,
+	    data, size, done, private, type, priority,
+	    flags | ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_RETRY,
+	    vd, offset, NULL,
+	    ZIO_STAGE_VDEV_IO_START >> 1, ZIO_VDEV_CHILD_PIPELINE);
+
+	return (zio);
+}
+
+void
+zio_flush(zio_t *zio, vdev_t *vd)
+{
+	zio_nowait(zio_ioctl(zio, zio->io_spa, vd, DKIOCFLUSHWRITECACHE,
+	    NULL, NULL, ZIO_PRIORITY_NOW,
+	    ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY));
+}
+
+void
+zio_shrink(zio_t *zio, uint64_t size)
+{
+	ASSERT(zio->io_executor == NULL);
+	ASSERT(zio->io_orig_size == zio->io_size);
+	ASSERT(size <= zio->io_size);
+
+	/*
+	 * We don't shrink for raidz because of problems with the
+	 * reconstruction when reading back less than the block size.
+	 * Note, BP_IS_RAIDZ() assumes no compression.
+	 */
+	ASSERT(BP_GET_COMPRESS(zio->io_bp) == ZIO_COMPRESS_OFF);
+	if (!BP_IS_RAIDZ(zio->io_bp))
+		zio->io_orig_size = zio->io_size = size;
+}
+
+/*
+ * ==========================================================================
+ * Prepare to read and write logical blocks
+ * ==========================================================================
+ */
+
+static int
+zio_read_bp_init(zio_t *zio)
+{
+	blkptr_t *bp = zio->io_bp;
+
+	if (BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF &&
+	    zio->io_child_type == ZIO_CHILD_LOGICAL &&
+	    !(zio->io_flags & ZIO_FLAG_RAW)) {
+		uint64_t psize = BP_GET_PSIZE(bp);
+		void *cbuf = zio_buf_alloc(psize);
+
+		zio_push_transform(zio, cbuf, psize, psize, zio_decompress);
+	}
+
+	if (!dmu_ot[BP_GET_TYPE(bp)].ot_metadata && BP_GET_LEVEL(bp) == 0)
+		zio->io_flags |= ZIO_FLAG_DONT_CACHE;
+
+	if (BP_GET_TYPE(bp) == DMU_OT_DDT_ZAP)
+		zio->io_flags |= ZIO_FLAG_DONT_CACHE;
+
+	if (BP_GET_DEDUP(bp) && zio->io_child_type == ZIO_CHILD_LOGICAL)
+		zio->io_pipeline = ZIO_DDT_READ_PIPELINE;
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+static int
+zio_write_bp_init(zio_t *zio)
+{
+	spa_t *spa = zio->io_spa;
+	zio_prop_t *zp = &zio->io_prop;
+	enum zio_compress compress = zp->zp_compress;
+	blkptr_t *bp = zio->io_bp;
+	uint64_t lsize = zio->io_size;
+	uint64_t psize = lsize;
+	int pass = 1;
+
+	/*
+	 * If our children haven't all reached the ready stage,
+	 * wait for them and then repeat this pipeline stage.
+	 */
+	if (zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_READY) ||
+	    zio_wait_for_children(zio, ZIO_CHILD_LOGICAL, ZIO_WAIT_READY))
+		return (ZIO_PIPELINE_STOP);
+
+	if (!IO_IS_ALLOCATING(zio))
+		return (ZIO_PIPELINE_CONTINUE);
+
+	ASSERT(zio->io_child_type != ZIO_CHILD_DDT);
+
+	if (zio->io_bp_override) {
+		ASSERT(bp->blk_birth != zio->io_txg);
+		ASSERT(BP_GET_DEDUP(zio->io_bp_override) == 0);
+
+		*bp = *zio->io_bp_override;
+		zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+
+		if (BP_IS_HOLE(bp) || !zp->zp_dedup)
+			return (ZIO_PIPELINE_CONTINUE);
+
+		ASSERT(zio_checksum_table[zp->zp_checksum].ci_dedup ||
+		    zp->zp_dedup_verify);
+
+		if (BP_GET_CHECKSUM(bp) == zp->zp_checksum) {
+			BP_SET_DEDUP(bp, 1);
+			zio->io_pipeline |= ZIO_STAGE_DDT_WRITE;
+			return (ZIO_PIPELINE_CONTINUE);
+		}
+		zio->io_bp_override = NULL;
+		BP_ZERO(bp);
+	}
+
+	if (bp->blk_birth == zio->io_txg) {
+		/*
+		 * We're rewriting an existing block, which means we're
+		 * working on behalf of spa_sync().  For spa_sync() to
+		 * converge, it must eventually be the case that we don't
+		 * have to allocate new blocks.  But compression changes
+		 * the blocksize, which forces a reallocate, and makes
+		 * convergence take longer.  Therefore, after the first
+		 * few passes, stop compressing to ensure convergence.
+		 */
+		pass = spa_sync_pass(spa);
+
+		ASSERT(zio->io_txg == spa_syncing_txg(spa));
+		ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+		ASSERT(!BP_GET_DEDUP(bp));
+
+		if (pass > SYNC_PASS_DONT_COMPRESS)
+			compress = ZIO_COMPRESS_OFF;
+
+		/* Make sure someone doesn't change their mind on overwrites */
+		ASSERT(MIN(zp->zp_copies + BP_IS_GANG(bp),
+		    spa_max_replication(spa)) == BP_GET_NDVAS(bp));
+	}
+
+	if (compress != ZIO_COMPRESS_OFF) {
+		void *cbuf = zio_buf_alloc(lsize);
+		psize = zio_compress_data(compress, zio->io_data, cbuf, lsize);
+		if (psize == 0 || psize == lsize) {
+			compress = ZIO_COMPRESS_OFF;
+			zio_buf_free(cbuf, lsize);
+		} else {
+			ASSERT(psize < lsize);
+			zio_push_transform(zio, cbuf, psize, lsize, NULL);
+		}
+	}
+
+	/*
+	 * The final pass of spa_sync() must be all rewrites, but the first
+	 * few passes offer a trade-off: allocating blocks defers convergence,
+	 * but newly allocated blocks are sequential, so they can be written
+	 * to disk faster.  Therefore, we allow the first few passes of
+	 * spa_sync() to allocate new blocks, but force rewrites after that.
+	 * There should only be a handful of blocks after pass 1 in any case.
+	 */
+	if (bp->blk_birth == zio->io_txg && BP_GET_PSIZE(bp) == psize &&
+	    pass > SYNC_PASS_REWRITE) {
+		ASSERT(psize != 0);
+		enum zio_stage gang_stages = zio->io_pipeline & ZIO_GANG_STAGES;
+		zio->io_pipeline = ZIO_REWRITE_PIPELINE | gang_stages;
+		zio->io_flags |= ZIO_FLAG_IO_REWRITE;
+	} else {
+		BP_ZERO(bp);
+		zio->io_pipeline = ZIO_WRITE_PIPELINE;
+	}
+
+	if (psize == 0) {
+		zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+	} else {
+		ASSERT(zp->zp_checksum != ZIO_CHECKSUM_GANG_HEADER);
+		BP_SET_LSIZE(bp, lsize);
+		BP_SET_PSIZE(bp, psize);
+		BP_SET_COMPRESS(bp, compress);
+		BP_SET_CHECKSUM(bp, zp->zp_checksum);
+		BP_SET_TYPE(bp, zp->zp_type);
+		BP_SET_LEVEL(bp, zp->zp_level);
+		BP_SET_DEDUP(bp, zp->zp_dedup);
+		BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
+		if (zp->zp_dedup) {
+			ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+			ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE));
+			zio->io_pipeline = ZIO_DDT_WRITE_PIPELINE;
+		}
+	}
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+static int
+zio_free_bp_init(zio_t *zio)
+{
+	blkptr_t *bp = zio->io_bp;
+
+	if (zio->io_child_type == ZIO_CHILD_LOGICAL) {
+		if (BP_GET_DEDUP(bp))
+			zio->io_pipeline = ZIO_DDT_FREE_PIPELINE;
+	}
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+/*
+ * ==========================================================================
+ * Execute the I/O pipeline
+ * ==========================================================================
+ */
+
+static void
+zio_taskq_dispatch(zio_t *zio, enum zio_taskq_type q, boolean_t cutinline)
+{
+	spa_t *spa = zio->io_spa;
+	zio_type_t t = zio->io_type;
+	int flags = TQ_SLEEP | (cutinline ? TQ_FRONT : 0);
+
+	/*
+	 * If we're a config writer or a probe, the normal issue and
+	 * interrupt threads may all be blocked waiting for the config lock.
+	 * In this case, select the otherwise-unused taskq for ZIO_TYPE_NULL.
+	 */
+	if (zio->io_flags & (ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_PROBE))
+		t = ZIO_TYPE_NULL;
+
+	/*
+	 * A similar issue exists for the L2ARC write thread until L2ARC 2.0.
+	 */
+	if (t == ZIO_TYPE_WRITE && zio->io_vd && zio->io_vd->vdev_aux)
+		t = ZIO_TYPE_NULL;
+
+	/*
+	 * If this is a high priority I/O, then use the high priority taskq.
+	 */
+	if (zio->io_priority == ZIO_PRIORITY_NOW &&
+	    spa->spa_zio_taskq[t][q + 1] != NULL)
+		q++;
+
+	ASSERT3U(q, <, ZIO_TASKQ_TYPES);
+	(void) taskq_dispatch(spa->spa_zio_taskq[t][q],
+	    (task_func_t *)zio_execute, zio, flags);
+}
+
+static boolean_t
+zio_taskq_member(zio_t *zio, enum zio_taskq_type q)
+{
+	kthread_t *executor = zio->io_executor;
+	spa_t *spa = zio->io_spa;
+
+	for (zio_type_t t = 0; t < ZIO_TYPES; t++)
+		if (taskq_member(spa->spa_zio_taskq[t][q], executor))
+			return (B_TRUE);
+
+	return (B_FALSE);
+}
+
+static int
+zio_issue_async(zio_t *zio)
+{
+	zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_FALSE);
+
+	return (ZIO_PIPELINE_STOP);
+}
+
+void
+zio_interrupt(zio_t *zio)
+{
+	zio_taskq_dispatch(zio, ZIO_TASKQ_INTERRUPT, B_FALSE);
+}
+
+/*
+ * Execute the I/O pipeline until one of the following occurs:
+ * (1) the I/O completes; (2) the pipeline stalls waiting for
+ * dependent child I/Os; (3) the I/O issues, so we're waiting
+ * for an I/O completion interrupt; (4) the I/O is delegated by
+ * vdev-level caching or aggregation; (5) the I/O is deferred
+ * due to vdev-level queueing; (6) the I/O is handed off to
+ * another thread.  In all cases, the pipeline stops whenever
+ * there's no CPU work; it never burns a thread in cv_wait().
+ *
+ * There's no locking on io_stage because there's no legitimate way
+ * for multiple threads to be attempting to process the same I/O.
+ */
+static zio_pipe_stage_t *zio_pipeline[];
+
+void
+zio_execute(zio_t *zio)
+{
+	zio->io_executor = curthread;
+
+	while (zio->io_stage < ZIO_STAGE_DONE) {
+		enum zio_stage pipeline = zio->io_pipeline;
+		enum zio_stage stage = zio->io_stage;
+		int rv;
+
+		ASSERT(!MUTEX_HELD(&zio->io_lock));
+		ASSERT(ISP2(stage));
+		ASSERT(zio->io_stall == NULL);
+
+		do {
+			stage <<= 1;
+		} while ((stage & pipeline) == 0);
+
+		ASSERT(stage <= ZIO_STAGE_DONE);
+
+		/*
+		 * If we are in interrupt context and this pipeline stage
+		 * will grab a config lock that is held across I/O,
+		 * or may wait for an I/O that needs an interrupt thread
+		 * to complete, issue async to avoid deadlock.
+		 *
+		 * For VDEV_IO_START, we cut in line so that the io will
+		 * be sent to disk promptly.
+		 */
+		if ((stage & ZIO_BLOCKING_STAGES) && zio->io_vd == NULL &&
+		    zio_taskq_member(zio, ZIO_TASKQ_INTERRUPT)) {
+			boolean_t cut = (stage == ZIO_STAGE_VDEV_IO_START) ?
+			    zio_requeue_io_start_cut_in_line : B_FALSE;
+			zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, cut);
+			return;
+		}
+
+		zio->io_stage = stage;
+		rv = zio_pipeline[highbit(stage) - 1](zio);
+
+		if (rv == ZIO_PIPELINE_STOP)
+			return;
+
+		ASSERT(rv == ZIO_PIPELINE_CONTINUE);
+	}
+}
+
+/*
+ * ==========================================================================
+ * Initiate I/O, either sync or async
+ * ==========================================================================
+ */
+int
+zio_wait(zio_t *zio)
+{
+	int error;
+
+	ASSERT(zio->io_stage == ZIO_STAGE_OPEN);
+	ASSERT(zio->io_executor == NULL);
+
+	zio->io_waiter = curthread;
+
+	zio_execute(zio);
+
+	mutex_enter(&zio->io_lock);
+	while (zio->io_executor != NULL)
+		cv_wait(&zio->io_cv, &zio->io_lock);
+	mutex_exit(&zio->io_lock);
+
+	error = zio->io_error;
+	zio_destroy(zio);
+
+	return (error);
+}
+
+void
+zio_nowait(zio_t *zio)
+{
+	ASSERT(zio->io_executor == NULL);
+
+	if (zio->io_child_type == ZIO_CHILD_LOGICAL &&
+	    zio_unique_parent(zio) == NULL) {
+		/*
+		 * This is a logical async I/O with no parent to wait for it.
+		 * We add it to the spa_async_root_zio "Godfather" I/O which
+		 * will ensure they complete prior to unloading the pool.
+		 */
+		spa_t *spa = zio->io_spa;
+
+		zio_add_child(spa->spa_async_zio_root, zio);
+	}
+
+	zio_execute(zio);
+}
+
+/*
+ * ==========================================================================
+ * Reexecute or suspend/resume failed I/O
+ * ==========================================================================
+ */
+
+static void
+zio_reexecute(zio_t *pio)
+{
+	zio_t *cio, *cio_next;
+
+	ASSERT(pio->io_child_type == ZIO_CHILD_LOGICAL);
+	ASSERT(pio->io_orig_stage == ZIO_STAGE_OPEN);
+	ASSERT(pio->io_gang_leader == NULL);
+	ASSERT(pio->io_gang_tree == NULL);
+
+	pio->io_flags = pio->io_orig_flags;
+	pio->io_stage = pio->io_orig_stage;
+	pio->io_pipeline = pio->io_orig_pipeline;
+	pio->io_reexecute = 0;
+	pio->io_error = 0;
+	for (int w = 0; w < ZIO_WAIT_TYPES; w++)
+		pio->io_state[w] = 0;
+	for (int c = 0; c < ZIO_CHILD_TYPES; c++)
+		pio->io_child_error[c] = 0;
+
+	if (IO_IS_ALLOCATING(pio))
+		BP_ZERO(pio->io_bp);
+
+	/*
+	 * As we reexecute pio's children, new children could be created.
+	 * New children go to the head of pio's io_child_list, however,
+	 * so we will (correctly) not reexecute them.  The key is that
+	 * the remainder of pio's io_child_list, from 'cio_next' onward,
+	 * cannot be affected by any side effects of reexecuting 'cio'.
+	 */
+	for (cio = zio_walk_children(pio); cio != NULL; cio = cio_next) {
+		cio_next = zio_walk_children(pio);
+		mutex_enter(&pio->io_lock);
+		for (int w = 0; w < ZIO_WAIT_TYPES; w++)
+			pio->io_children[cio->io_child_type][w]++;
+		mutex_exit(&pio->io_lock);
+		zio_reexecute(cio);
+	}
+
+	/*
+	 * Now that all children have been reexecuted, execute the parent.
+	 * We don't reexecute "The Godfather" I/O here as it's the
+	 * responsibility of the caller to wait on him.
+	 */
+	if (!(pio->io_flags & ZIO_FLAG_GODFATHER))
+		zio_execute(pio);
+}
+
+void
+zio_suspend(spa_t *spa, zio_t *zio)
+{
+	if (spa_get_failmode(spa) == ZIO_FAILURE_MODE_PANIC)
+		fm_panic("Pool '%s' has encountered an uncorrectable I/O "
+		    "failure and the failure mode property for this pool "
+		    "is set to panic.", spa_name(spa));
+
+	zfs_ereport_post(FM_EREPORT_ZFS_IO_FAILURE, spa, NULL, NULL, 0, 0);
+
+	mutex_enter(&spa->spa_suspend_lock);
+
+	if (spa->spa_suspend_zio_root == NULL)
+		spa->spa_suspend_zio_root = zio_root(spa, NULL, NULL,
+		    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
+		    ZIO_FLAG_GODFATHER);
+
+	spa->spa_suspended = B_TRUE;
+
+	if (zio != NULL) {
+		ASSERT(!(zio->io_flags & ZIO_FLAG_GODFATHER));
+		ASSERT(zio != spa->spa_suspend_zio_root);
+		ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+		ASSERT(zio_unique_parent(zio) == NULL);
+		ASSERT(zio->io_stage == ZIO_STAGE_DONE);
+		zio_add_child(spa->spa_suspend_zio_root, zio);
+	}
+
+	mutex_exit(&spa->spa_suspend_lock);
+}
+
+int
+zio_resume(spa_t *spa)
+{
+	zio_t *pio;
+
+	/*
+	 * Reexecute all previously suspended i/o.
+	 */
+	mutex_enter(&spa->spa_suspend_lock);
+	spa->spa_suspended = B_FALSE;
+	cv_broadcast(&spa->spa_suspend_cv);
+	pio = spa->spa_suspend_zio_root;
+	spa->spa_suspend_zio_root = NULL;
+	mutex_exit(&spa->spa_suspend_lock);
+
+	if (pio == NULL)
+		return (0);
+
+	zio_reexecute(pio);
+	return (zio_wait(pio));
+}
+
+void
+zio_resume_wait(spa_t *spa)
+{
+	mutex_enter(&spa->spa_suspend_lock);
+	while (spa_suspended(spa))
+		cv_wait(&spa->spa_suspend_cv, &spa->spa_suspend_lock);
+	mutex_exit(&spa->spa_suspend_lock);
+}
+
+/*
+ * ==========================================================================
+ * Gang blocks.
+ *
+ * A gang block is a collection of small blocks that looks to the DMU
+ * like one large block.  When zio_dva_allocate() cannot find a block
+ * of the requested size, due to either severe fragmentation or the pool
+ * being nearly full, it calls zio_write_gang_block() to construct the
+ * block from smaller fragments.
+ *
+ * A gang block consists of a gang header (zio_gbh_phys_t) and up to
+ * three (SPA_GBH_NBLKPTRS) gang members.  The gang header is just like
+ * an indirect block: it's an array of block pointers.  It consumes
+ * only one sector and hence is allocatable regardless of fragmentation.
+ * The gang header's bps point to its gang members, which hold the data.
+ *
+ * Gang blocks are self-checksumming, using the bp's <vdev, offset, txg>
+ * as the verifier to ensure uniqueness of the SHA256 checksum.
+ * Critically, the gang block bp's blk_cksum is the checksum of the data,
+ * not the gang header.  This ensures that data block signatures (needed for
+ * deduplication) are independent of how the block is physically stored.
+ *
+ * Gang blocks can be nested: a gang member may itself be a gang block.
+ * Thus every gang block is a tree in which root and all interior nodes are
+ * gang headers, and the leaves are normal blocks that contain user data.
+ * The root of the gang tree is called the gang leader.
+ *
+ * To perform any operation (read, rewrite, free, claim) on a gang block,
+ * zio_gang_assemble() first assembles the gang tree (minus data leaves)
+ * in the io_gang_tree field of the original logical i/o by recursively
+ * reading the gang leader and all gang headers below it.  This yields
+ * an in-core tree containing the contents of every gang header and the
+ * bps for every constituent of the gang block.
+ *
+ * With the gang tree now assembled, zio_gang_issue() just walks the gang tree
+ * and invokes a callback on each bp.  To free a gang block, zio_gang_issue()
+ * calls zio_free_gang() -- a trivial wrapper around zio_free() -- for each bp.
+ * zio_claim_gang() provides a similarly trivial wrapper for zio_claim().
+ * zio_read_gang() is a wrapper around zio_read() that omits reading gang
+ * headers, since we already have those in io_gang_tree.  zio_rewrite_gang()
+ * performs a zio_rewrite() of the data or, for gang headers, a zio_rewrite()
+ * of the gang header plus zio_checksum_compute() of the data to update the
+ * gang header's blk_cksum as described above.
+ *
+ * The two-phase assemble/issue model solves the problem of partial failure --
+ * what if you'd freed part of a gang block but then couldn't read the
+ * gang header for another part?  Assembling the entire gang tree first
+ * ensures that all the necessary gang header I/O has succeeded before
+ * starting the actual work of free, claim, or write.  Once the gang tree
+ * is assembled, free and claim are in-memory operations that cannot fail.
+ *
+ * In the event that a gang write fails, zio_dva_unallocate() walks the
+ * gang tree to immediately free (i.e. insert back into the space map)
+ * everything we've allocated.  This ensures that we don't get ENOSPC
+ * errors during repeated suspend/resume cycles due to a flaky device.
+ *
+ * Gang rewrites only happen during sync-to-convergence.  If we can't assemble
+ * the gang tree, we won't modify the block, so we can safely defer the free
+ * (knowing that the block is still intact).  If we *can* assemble the gang
+ * tree, then even if some of the rewrites fail, zio_dva_unallocate() will free
+ * each constituent bp and we can allocate a new block on the next sync pass.
+ *
+ * In all cases, the gang tree allows complete recovery from partial failure.
+ * ==========================================================================
+ */
+
+static zio_t *
+zio_read_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, void *data)
+{
+	if (gn != NULL)
+		return (pio);
+
+	return (zio_read(pio, pio->io_spa, bp, data, BP_GET_PSIZE(bp),
+	    NULL, NULL, pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio),
+	    &pio->io_bookmark));
+}
+
+zio_t *
+zio_rewrite_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, void *data)
+{
+	zio_t *zio;
+
+	if (gn != NULL) {
+		zio = zio_rewrite(pio, pio->io_spa, pio->io_txg, bp,
+		    gn->gn_gbh, SPA_GANGBLOCKSIZE, NULL, NULL, pio->io_priority,
+		    ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark);
+		/*
+		 * As we rewrite each gang header, the pipeline will compute
+		 * a new gang block header checksum for it; but no one will
+		 * compute a new data checksum, so we do that here.  The one
+		 * exception is the gang leader: the pipeline already computed
+		 * its data checksum because that stage precedes gang assembly.
+		 * (Presently, nothing actually uses interior data checksums;
+		 * this is just good hygiene.)
+		 */
+		if (gn != pio->io_gang_leader->io_gang_tree) {
+			zio_checksum_compute(zio, BP_GET_CHECKSUM(bp),
+			    data, BP_GET_PSIZE(bp));
+		}
+		/*
+		 * If we are here to damage data for testing purposes,
+		 * leave the GBH alone so that we can detect the damage.
+		 */
+		if (pio->io_gang_leader->io_flags & ZIO_FLAG_INDUCE_DAMAGE)
+			zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES;
+	} else {
+		zio = zio_rewrite(pio, pio->io_spa, pio->io_txg, bp,
+		    data, BP_GET_PSIZE(bp), NULL, NULL, pio->io_priority,
+		    ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark);
+	}
+
+	return (zio);
+}
+
+/* ARGSUSED */
+zio_t *
+zio_free_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, void *data)
+{
+	return (zio_free_sync(pio, pio->io_spa, pio->io_txg, bp,
+	    ZIO_GANG_CHILD_FLAGS(pio)));
+}
+
+/* ARGSUSED */
+zio_t *
+zio_claim_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, void *data)
+{
+	return (zio_claim(pio, pio->io_spa, pio->io_txg, bp,
+	    NULL, NULL, ZIO_GANG_CHILD_FLAGS(pio)));
+}
+
+static zio_gang_issue_func_t *zio_gang_issue_func[ZIO_TYPES] = {
+	NULL,
+	zio_read_gang,
+	zio_rewrite_gang,
+	zio_free_gang,
+	zio_claim_gang,
+	NULL
+};
+
+static void zio_gang_tree_assemble_done(zio_t *zio);
+
+static zio_gang_node_t *
+zio_gang_node_alloc(zio_gang_node_t **gnpp)
+{
+	zio_gang_node_t *gn;
+
+	ASSERT(*gnpp == NULL);
+
+	gn = kmem_zalloc(sizeof (*gn), KM_SLEEP);
+	gn->gn_gbh = zio_buf_alloc(SPA_GANGBLOCKSIZE);
+	*gnpp = gn;
+
+	return (gn);
+}
+
+static void
+zio_gang_node_free(zio_gang_node_t **gnpp)
+{
+	zio_gang_node_t *gn = *gnpp;
+
+	for (int g = 0; g < SPA_GBH_NBLKPTRS; g++)
+		ASSERT(gn->gn_child[g] == NULL);
+
+	zio_buf_free(gn->gn_gbh, SPA_GANGBLOCKSIZE);
+	kmem_free(gn, sizeof (*gn));
+	*gnpp = NULL;
+}
+
+static void
+zio_gang_tree_free(zio_gang_node_t **gnpp)
+{
+	zio_gang_node_t *gn = *gnpp;
+
+	if (gn == NULL)
+		return;
+
+	for (int g = 0; g < SPA_GBH_NBLKPTRS; g++)
+		zio_gang_tree_free(&gn->gn_child[g]);
+
+	zio_gang_node_free(gnpp);
+}
+
+static void
+zio_gang_tree_assemble(zio_t *gio, blkptr_t *bp, zio_gang_node_t **gnpp)
+{
+	zio_gang_node_t *gn = zio_gang_node_alloc(gnpp);
+
+	ASSERT(gio->io_gang_leader == gio);
+	ASSERT(BP_IS_GANG(bp));
+
+	zio_nowait(zio_read(gio, gio->io_spa, bp, gn->gn_gbh,
+	    SPA_GANGBLOCKSIZE, zio_gang_tree_assemble_done, gn,
+	    gio->io_priority, ZIO_GANG_CHILD_FLAGS(gio), &gio->io_bookmark));
+}
+
+static void
+zio_gang_tree_assemble_done(zio_t *zio)
+{
+	zio_t *gio = zio->io_gang_leader;
+	zio_gang_node_t *gn = zio->io_private;
+	blkptr_t *bp = zio->io_bp;
+
+	ASSERT(gio == zio_unique_parent(zio));
+	ASSERT(zio->io_child_count == 0);
+
+	if (zio->io_error)
+		return;
+
+	if (BP_SHOULD_BYTESWAP(bp))
+		byteswap_uint64_array(zio->io_data, zio->io_size);
+
+	ASSERT(zio->io_data == gn->gn_gbh);
+	ASSERT(zio->io_size == SPA_GANGBLOCKSIZE);
+	ASSERT(gn->gn_gbh->zg_tail.zec_magic == ZEC_MAGIC);
+
+	for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) {
+		blkptr_t *gbp = &gn->gn_gbh->zg_blkptr[g];
+		if (!BP_IS_GANG(gbp))
+			continue;
+		zio_gang_tree_assemble(gio, gbp, &gn->gn_child[g]);
+	}
+}
+
+static void
+zio_gang_tree_issue(zio_t *pio, zio_gang_node_t *gn, blkptr_t *bp, void *data)
+{
+	zio_t *gio = pio->io_gang_leader;
+	zio_t *zio;
+
+	ASSERT(BP_IS_GANG(bp) == !!gn);
+	ASSERT(BP_GET_CHECKSUM(bp) == BP_GET_CHECKSUM(gio->io_bp));
+	ASSERT(BP_GET_LSIZE(bp) == BP_GET_PSIZE(bp) || gn == gio->io_gang_tree);
+
+	/*
+	 * If you're a gang header, your data is in gn->gn_gbh.
+	 * If you're a gang member, your data is in 'data' and gn == NULL.
+	 */
+	zio = zio_gang_issue_func[gio->io_type](pio, bp, gn, data);
+
+	if (gn != NULL) {
+		ASSERT(gn->gn_gbh->zg_tail.zec_magic == ZEC_MAGIC);
+
+		for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) {
+			blkptr_t *gbp = &gn->gn_gbh->zg_blkptr[g];
+			if (BP_IS_HOLE(gbp))
+				continue;
+			zio_gang_tree_issue(zio, gn->gn_child[g], gbp, data);
+			data = (char *)data + BP_GET_PSIZE(gbp);
+		}
+	}
+
+	if (gn == gio->io_gang_tree)
+		ASSERT3P((char *)gio->io_data + gio->io_size, ==, data);
+
+	if (zio != pio)
+		zio_nowait(zio);
+}
+
+static int
+zio_gang_assemble(zio_t *zio)
+{
+	blkptr_t *bp = zio->io_bp;
+
+	ASSERT(BP_IS_GANG(bp) && zio->io_gang_leader == NULL);
+	ASSERT(zio->io_child_type > ZIO_CHILD_GANG);
+
+	zio->io_gang_leader = zio;
+
+	zio_gang_tree_assemble(zio, bp, &zio->io_gang_tree);
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+static int
+zio_gang_issue(zio_t *zio)
+{
+	blkptr_t *bp = zio->io_bp;
+
+	if (zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_DONE))
+		return (ZIO_PIPELINE_STOP);
+
+	ASSERT(BP_IS_GANG(bp) && zio->io_gang_leader == zio);
+	ASSERT(zio->io_child_type > ZIO_CHILD_GANG);
+
+	if (zio->io_child_error[ZIO_CHILD_GANG] == 0)
+		zio_gang_tree_issue(zio, zio->io_gang_tree, bp, zio->io_data);
+	else
+		zio_gang_tree_free(&zio->io_gang_tree);
+
+	zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+static void
+zio_write_gang_member_ready(zio_t *zio)
+{
+	zio_t *pio = zio_unique_parent(zio);
+	zio_t *gio = zio->io_gang_leader;
+	dva_t *cdva = zio->io_bp->blk_dva;
+	dva_t *pdva = pio->io_bp->blk_dva;
+	uint64_t asize;
+
+	if (BP_IS_HOLE(zio->io_bp))
+		return;
+
+	ASSERT(BP_IS_HOLE(&zio->io_bp_orig));
+
+	ASSERT(zio->io_child_type == ZIO_CHILD_GANG);
+	ASSERT3U(zio->io_prop.zp_copies, ==, gio->io_prop.zp_copies);
+	ASSERT3U(zio->io_prop.zp_copies, <=, BP_GET_NDVAS(zio->io_bp));
+	ASSERT3U(pio->io_prop.zp_copies, <=, BP_GET_NDVAS(pio->io_bp));
+	ASSERT3U(BP_GET_NDVAS(zio->io_bp), <=, BP_GET_NDVAS(pio->io_bp));
+
+	mutex_enter(&pio->io_lock);
+	for (int d = 0; d < BP_GET_NDVAS(zio->io_bp); d++) {
+		ASSERT(DVA_GET_GANG(&pdva[d]));
+		asize = DVA_GET_ASIZE(&pdva[d]);
+		asize += DVA_GET_ASIZE(&cdva[d]);
+		DVA_SET_ASIZE(&pdva[d], asize);
+	}
+	mutex_exit(&pio->io_lock);
+}
+
+static int
+zio_write_gang_block(zio_t *pio)
+{
+	spa_t *spa = pio->io_spa;
+	blkptr_t *bp = pio->io_bp;
+	zio_t *gio = pio->io_gang_leader;
+	zio_t *zio;
+	zio_gang_node_t *gn, **gnpp;
+	zio_gbh_phys_t *gbh;
+	uint64_t txg = pio->io_txg;
+	uint64_t resid = pio->io_size;
+	uint64_t lsize;
+	int copies = gio->io_prop.zp_copies;
+	int gbh_copies = MIN(copies + 1, spa_max_replication(spa));
+	zio_prop_t zp;
+	int error;
+
+	error = metaslab_alloc(spa, spa_normal_class(spa), SPA_GANGBLOCKSIZE,
+	    bp, gbh_copies, txg, pio == gio ? NULL : gio->io_bp,
+	    METASLAB_HINTBP_FAVOR | METASLAB_GANG_HEADER);
+	if (error) {
+		pio->io_error = error;
+		return (ZIO_PIPELINE_CONTINUE);
+	}
+
+	if (pio == gio) {
+		gnpp = &gio->io_gang_tree;
+	} else {
+		gnpp = pio->io_private;
+		ASSERT(pio->io_ready == zio_write_gang_member_ready);
+	}
+
+	gn = zio_gang_node_alloc(gnpp);
+	gbh = gn->gn_gbh;
+	bzero(gbh, SPA_GANGBLOCKSIZE);
+
+	/*
+	 * Create the gang header.
+	 */
+	zio = zio_rewrite(pio, spa, txg, bp, gbh, SPA_GANGBLOCKSIZE, NULL, NULL,
+	    pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark);
+
+	/*
+	 * Create and nowait the gang children.
+	 */
+	for (int g = 0; resid != 0; resid -= lsize, g++) {
+		lsize = P2ROUNDUP(resid / (SPA_GBH_NBLKPTRS - g),
+		    SPA_MINBLOCKSIZE);
+		ASSERT(lsize >= SPA_MINBLOCKSIZE && lsize <= resid);
+
+		zp.zp_checksum = gio->io_prop.zp_checksum;
+		zp.zp_compress = ZIO_COMPRESS_OFF;
+		zp.zp_type = DMU_OT_NONE;
+		zp.zp_level = 0;
+		zp.zp_copies = gio->io_prop.zp_copies;
+		zp.zp_dedup = 0;
+		zp.zp_dedup_verify = 0;
+
+		zio_nowait(zio_write(zio, spa, txg, &gbh->zg_blkptr[g],
+		    (char *)pio->io_data + (pio->io_size - resid), lsize, &zp,
+		    zio_write_gang_member_ready, NULL, &gn->gn_child[g],
+		    pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio),
+		    &pio->io_bookmark));
+	}
+
+	/*
+	 * Set pio's pipeline to just wait for zio to finish.
+	 */
+	pio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+
+	zio_nowait(zio);
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+/*
+ * ==========================================================================
+ * Dedup
+ * ==========================================================================
+ */
+static void
+zio_ddt_child_read_done(zio_t *zio)
+{
+	blkptr_t *bp = zio->io_bp;
+	ddt_entry_t *dde = zio->io_private;
+	ddt_phys_t *ddp;
+	zio_t *pio = zio_unique_parent(zio);
+
+	mutex_enter(&pio->io_lock);
+	ddp = ddt_phys_select(dde, bp);
+	if (zio->io_error == 0)
+		ddt_phys_clear(ddp);	/* this ddp doesn't need repair */
+	if (zio->io_error == 0 && dde->dde_repair_data == NULL)
+		dde->dde_repair_data = zio->io_data;
+	else
+		zio_buf_free(zio->io_data, zio->io_size);
+	mutex_exit(&pio->io_lock);
+}
+
+static int
+zio_ddt_read_start(zio_t *zio)
+{
+	blkptr_t *bp = zio->io_bp;
+
+	ASSERT(BP_GET_DEDUP(bp));
+	ASSERT(BP_GET_PSIZE(bp) == zio->io_size);
+	ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+
+	if (zio->io_child_error[ZIO_CHILD_DDT]) {
+		ddt_t *ddt = ddt_select(zio->io_spa, bp);
+		ddt_entry_t *dde = ddt_repair_start(ddt, bp);
+		ddt_phys_t *ddp = dde->dde_phys;
+		ddt_phys_t *ddp_self = ddt_phys_select(dde, bp);
+		blkptr_t blk;
+
+		ASSERT(zio->io_vsd == NULL);
+		zio->io_vsd = dde;
+
+		if (ddp_self == NULL)
+			return (ZIO_PIPELINE_CONTINUE);
+
+		for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
+			if (ddp->ddp_phys_birth == 0 || ddp == ddp_self)
+				continue;
+			ddt_bp_create(ddt->ddt_checksum, &dde->dde_key, ddp,
+			    &blk);
+			zio_nowait(zio_read(zio, zio->io_spa, &blk,
+			    zio_buf_alloc(zio->io_size), zio->io_size,
+			    zio_ddt_child_read_done, dde, zio->io_priority,
+			    ZIO_DDT_CHILD_FLAGS(zio) | ZIO_FLAG_DONT_PROPAGATE,
+			    &zio->io_bookmark));
+		}
+		return (ZIO_PIPELINE_CONTINUE);
+	}
+
+	zio_nowait(zio_read(zio, zio->io_spa, bp,
+	    zio->io_data, zio->io_size, NULL, NULL, zio->io_priority,
+	    ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark));
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+static int
+zio_ddt_read_done(zio_t *zio)
+{
+	blkptr_t *bp = zio->io_bp;
+
+	if (zio_wait_for_children(zio, ZIO_CHILD_DDT, ZIO_WAIT_DONE))
+		return (ZIO_PIPELINE_STOP);
+
+	ASSERT(BP_GET_DEDUP(bp));
+	ASSERT(BP_GET_PSIZE(bp) == zio->io_size);
+	ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+
+	if (zio->io_child_error[ZIO_CHILD_DDT]) {
+		ddt_t *ddt = ddt_select(zio->io_spa, bp);
+		ddt_entry_t *dde = zio->io_vsd;
+		if (ddt == NULL) {
+			ASSERT(spa_load_state(zio->io_spa) != SPA_LOAD_NONE);
+			return (ZIO_PIPELINE_CONTINUE);
+		}
+		if (dde == NULL) {
+			zio->io_stage = ZIO_STAGE_DDT_READ_START >> 1;
+			zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_FALSE);
+			return (ZIO_PIPELINE_STOP);
+		}
+		if (dde->dde_repair_data != NULL) {
+			bcopy(dde->dde_repair_data, zio->io_data, zio->io_size);
+			zio->io_child_error[ZIO_CHILD_DDT] = 0;
+		}
+		ddt_repair_done(ddt, dde);
+		zio->io_vsd = NULL;
+	}
+
+	ASSERT(zio->io_vsd == NULL);
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+static boolean_t
+zio_ddt_collision(zio_t *zio, ddt_t *ddt, ddt_entry_t *dde)
+{
+	spa_t *spa = zio->io_spa;
+
+	/*
+	 * Note: we compare the original data, not the transformed data,
+	 * because when zio->io_bp is an override bp, we will not have
+	 * pushed the I/O transforms.  That's an important optimization
+	 * because otherwise we'd compress/encrypt all dmu_sync() data twice.
+	 */
+	for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) {
+		zio_t *lio = dde->dde_lead_zio[p];
+
+		if (lio != NULL) {
+			return (lio->io_orig_size != zio->io_orig_size ||
+			    bcmp(zio->io_orig_data, lio->io_orig_data,
+			    zio->io_orig_size) != 0);
+		}
+	}
+
+	for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) {
+		ddt_phys_t *ddp = &dde->dde_phys[p];
+
+		if (ddp->ddp_phys_birth != 0) {
+			arc_buf_t *abuf = NULL;
+			uint32_t aflags = ARC_WAIT;
+			blkptr_t blk = *zio->io_bp;
+			int error;
+
+			ddt_bp_fill(ddp, &blk, ddp->ddp_phys_birth);
+
+			ddt_exit(ddt);
+
+			error = arc_read_nolock(NULL, spa, &blk,
+			    arc_getbuf_func, &abuf, ZIO_PRIORITY_SYNC_READ,
+			    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
+			    &aflags, &zio->io_bookmark);
+
+			if (error == 0) {
+				if (arc_buf_size(abuf) != zio->io_orig_size ||
+				    bcmp(abuf->b_data, zio->io_orig_data,
+				    zio->io_orig_size) != 0)
+					error = EEXIST;
+				VERIFY(arc_buf_remove_ref(abuf, &abuf) == 1);
+			}
+
+			ddt_enter(ddt);
+			return (error != 0);
+		}
+	}
+
+	return (B_FALSE);
+}
+
+static void
+zio_ddt_child_write_ready(zio_t *zio)
+{
+	int p = zio->io_prop.zp_copies;
+	ddt_t *ddt = ddt_select(zio->io_spa, zio->io_bp);
+	ddt_entry_t *dde = zio->io_private;
+	ddt_phys_t *ddp = &dde->dde_phys[p];
+	zio_t *pio;
+
+	if (zio->io_error)
+		return;
+
+	ddt_enter(ddt);
+
+	ASSERT(dde->dde_lead_zio[p] == zio);
+
+	ddt_phys_fill(ddp, zio->io_bp);
+
+	while ((pio = zio_walk_parents(zio)) != NULL)
+		ddt_bp_fill(ddp, pio->io_bp, zio->io_txg);
+
+	ddt_exit(ddt);
+}
+
+static void
+zio_ddt_child_write_done(zio_t *zio)
+{
+	int p = zio->io_prop.zp_copies;
+	ddt_t *ddt = ddt_select(zio->io_spa, zio->io_bp);
+	ddt_entry_t *dde = zio->io_private;
+	ddt_phys_t *ddp = &dde->dde_phys[p];
+
+	ddt_enter(ddt);
+
+	ASSERT(ddp->ddp_refcnt == 0);
+	ASSERT(dde->dde_lead_zio[p] == zio);
+	dde->dde_lead_zio[p] = NULL;
+
+	if (zio->io_error == 0) {
+		while (zio_walk_parents(zio) != NULL)
+			ddt_phys_addref(ddp);
+	} else {
+		ddt_phys_clear(ddp);
+	}
+
+	ddt_exit(ddt);
+}
+
+static void
+zio_ddt_ditto_write_done(zio_t *zio)
+{
+	int p = DDT_PHYS_DITTO;
+	zio_prop_t *zp = &zio->io_prop;
+	blkptr_t *bp = zio->io_bp;
+	ddt_t *ddt = ddt_select(zio->io_spa, bp);
+	ddt_entry_t *dde = zio->io_private;
+	ddt_phys_t *ddp = &dde->dde_phys[p];
+	ddt_key_t *ddk = &dde->dde_key;
+
+	ddt_enter(ddt);
+
+	ASSERT(ddp->ddp_refcnt == 0);
+	ASSERT(dde->dde_lead_zio[p] == zio);
+	dde->dde_lead_zio[p] = NULL;
+
+	if (zio->io_error == 0) {
+		ASSERT(ZIO_CHECKSUM_EQUAL(bp->blk_cksum, ddk->ddk_cksum));
+		ASSERT(zp->zp_copies < SPA_DVAS_PER_BP);
+		ASSERT(zp->zp_copies == BP_GET_NDVAS(bp) - BP_IS_GANG(bp));
+		if (ddp->ddp_phys_birth != 0)
+			ddt_phys_free(ddt, ddk, ddp, zio->io_txg);
+		ddt_phys_fill(ddp, bp);
+	}
+
+	ddt_exit(ddt);
+}
+
+static int
+zio_ddt_write(zio_t *zio)
+{
+	spa_t *spa = zio->io_spa;
+	blkptr_t *bp = zio->io_bp;
+	uint64_t txg = zio->io_txg;
+	zio_prop_t *zp = &zio->io_prop;
+	int p = zp->zp_copies;
+	int ditto_copies;
+	zio_t *cio = NULL;
+	zio_t *dio = NULL;
+	ddt_t *ddt = ddt_select(spa, bp);
+	ddt_entry_t *dde;
+	ddt_phys_t *ddp;
+
+	ASSERT(BP_GET_DEDUP(bp));
+	ASSERT(BP_GET_CHECKSUM(bp) == zp->zp_checksum);
+	ASSERT(BP_IS_HOLE(bp) || zio->io_bp_override);
+
+	ddt_enter(ddt);
+	dde = ddt_lookup(ddt, bp, B_TRUE);
+	ddp = &dde->dde_phys[p];
+
+	if (zp->zp_dedup_verify && zio_ddt_collision(zio, ddt, dde)) {
+		/*
+		 * If we're using a weak checksum, upgrade to a strong checksum
+		 * and try again.  If we're already using a strong checksum,
+		 * we can't resolve it, so just convert to an ordinary write.
+		 * (And automatically e-mail a paper to Nature?)
+		 */
+		if (!zio_checksum_table[zp->zp_checksum].ci_dedup) {
+			zp->zp_checksum = spa_dedup_checksum(spa);
+			zio_pop_transforms(zio);
+			zio->io_stage = ZIO_STAGE_OPEN;
+			BP_ZERO(bp);
+		} else {
+			zp->zp_dedup = 0;
+		}
+		zio->io_pipeline = ZIO_WRITE_PIPELINE;
+		ddt_exit(ddt);
+		return (ZIO_PIPELINE_CONTINUE);
+	}
+
+	ditto_copies = ddt_ditto_copies_needed(ddt, dde, ddp);
+	ASSERT(ditto_copies < SPA_DVAS_PER_BP);
+
+	if (ditto_copies > ddt_ditto_copies_present(dde) &&
+	    dde->dde_lead_zio[DDT_PHYS_DITTO] == NULL) {
+		zio_prop_t czp = *zp;
+
+		czp.zp_copies = ditto_copies;
+
+		/*
+		 * If we arrived here with an override bp, we won't have run
+		 * the transform stack, so we won't have the data we need to
+		 * generate a child i/o.  So, toss the override bp and restart.
+		 * This is safe, because using the override bp is just an
+		 * optimization; and it's rare, so the cost doesn't matter.
+		 */
+		if (zio->io_bp_override) {
+			zio_pop_transforms(zio);
+			zio->io_stage = ZIO_STAGE_OPEN;
+			zio->io_pipeline = ZIO_WRITE_PIPELINE;
+			zio->io_bp_override = NULL;
+			BP_ZERO(bp);
+			ddt_exit(ddt);
+			return (ZIO_PIPELINE_CONTINUE);
+		}
+
+		dio = zio_write(zio, spa, txg, bp, zio->io_orig_data,
+		    zio->io_orig_size, &czp, NULL,
+		    zio_ddt_ditto_write_done, dde, zio->io_priority,
+		    ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark);
+
+		zio_push_transform(dio, zio->io_data, zio->io_size, 0, NULL);
+		dde->dde_lead_zio[DDT_PHYS_DITTO] = dio;
+	}
+
+	if (ddp->ddp_phys_birth != 0 || dde->dde_lead_zio[p] != NULL) {
+		if (ddp->ddp_phys_birth != 0)
+			ddt_bp_fill(ddp, bp, txg);
+		if (dde->dde_lead_zio[p] != NULL)
+			zio_add_child(zio, dde->dde_lead_zio[p]);
+		else
+			ddt_phys_addref(ddp);
+	} else if (zio->io_bp_override) {
+		ASSERT(bp->blk_birth == txg);
+		ASSERT(BP_EQUAL(bp, zio->io_bp_override));
+		ddt_phys_fill(ddp, bp);
+		ddt_phys_addref(ddp);
+	} else {
+		cio = zio_write(zio, spa, txg, bp, zio->io_orig_data,
+		    zio->io_orig_size, zp, zio_ddt_child_write_ready,
+		    zio_ddt_child_write_done, dde, zio->io_priority,
+		    ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark);
+
+		zio_push_transform(cio, zio->io_data, zio->io_size, 0, NULL);
+		dde->dde_lead_zio[p] = cio;
+	}
+
+	ddt_exit(ddt);
+
+	if (cio)
+		zio_nowait(cio);
+	if (dio)
+		zio_nowait(dio);
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+ddt_entry_t *freedde; /* for debugging */
+
+static int
+zio_ddt_free(zio_t *zio)
+{
+	spa_t *spa = zio->io_spa;
+	blkptr_t *bp = zio->io_bp;
+	ddt_t *ddt = ddt_select(spa, bp);
+	ddt_entry_t *dde;
+	ddt_phys_t *ddp;
+
+	ASSERT(BP_GET_DEDUP(bp));
+	ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+
+	ddt_enter(ddt);
+	freedde = dde = ddt_lookup(ddt, bp, B_TRUE);
+	ddp = ddt_phys_select(dde, bp);
+	ddt_phys_decref(ddp);
+	ddt_exit(ddt);
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+/*
+ * ==========================================================================
+ * Allocate and free blocks
+ * ==========================================================================
+ */
+static int
+zio_dva_allocate(zio_t *zio)
+{
+	spa_t *spa = zio->io_spa;
+	metaslab_class_t *mc = spa_normal_class(spa);
+	blkptr_t *bp = zio->io_bp;
+	int error;
+
+	if (zio->io_gang_leader == NULL) {
+		ASSERT(zio->io_child_type > ZIO_CHILD_GANG);
+		zio->io_gang_leader = zio;
+	}
+
+	ASSERT(BP_IS_HOLE(bp));
+	ASSERT3U(BP_GET_NDVAS(bp), ==, 0);
+	ASSERT3U(zio->io_prop.zp_copies, >, 0);
+	ASSERT3U(zio->io_prop.zp_copies, <=, spa_max_replication(spa));
+	ASSERT3U(zio->io_size, ==, BP_GET_PSIZE(bp));
+
+	error = metaslab_alloc(spa, mc, zio->io_size, bp,
+	    zio->io_prop.zp_copies, zio->io_txg, NULL, 0);
+
+	if (error) {
+		if (error == ENOSPC && zio->io_size > SPA_MINBLOCKSIZE)
+			return (zio_write_gang_block(zio));
+		zio->io_error = error;
+	}
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+static int
+zio_dva_free(zio_t *zio)
+{
+	metaslab_free(zio->io_spa, zio->io_bp, zio->io_txg, B_FALSE);
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+static int
+zio_dva_claim(zio_t *zio)
+{
+	int error;
+
+	error = metaslab_claim(zio->io_spa, zio->io_bp, zio->io_txg);
+	if (error)
+		zio->io_error = error;
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+/*
+ * Undo an allocation.  This is used by zio_done() when an I/O fails
+ * and we want to give back the block we just allocated.
+ * This handles both normal blocks and gang blocks.
+ */
+static void
+zio_dva_unallocate(zio_t *zio, zio_gang_node_t *gn, blkptr_t *bp)
+{
+	ASSERT(bp->blk_birth == zio->io_txg || BP_IS_HOLE(bp));
+	ASSERT(zio->io_bp_override == NULL);
+
+	if (!BP_IS_HOLE(bp))
+		metaslab_free(zio->io_spa, bp, bp->blk_birth, B_TRUE);
+
+	if (gn != NULL) {
+		for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) {
+			zio_dva_unallocate(zio, gn->gn_child[g],
+			    &gn->gn_gbh->zg_blkptr[g]);
+		}
+	}
+}
+
+/*
+ * Try to allocate an intent log block.  Return 0 on success, errno on failure.
+ */
+int
+zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, blkptr_t *old_bp,
+    uint64_t size, boolean_t use_slog)
+{
+	int error = 1;
+
+	ASSERT(txg > spa_syncing_txg(spa));
+
+	if (use_slog)
+		error = metaslab_alloc(spa, spa_log_class(spa), size,
+		    new_bp, 1, txg, old_bp, METASLAB_HINTBP_AVOID);
+
+	if (error)
+		error = metaslab_alloc(spa, spa_normal_class(spa), size,
+		    new_bp, 1, txg, old_bp, METASLAB_HINTBP_AVOID);
+
+	if (error == 0) {
+		BP_SET_LSIZE(new_bp, size);
+		BP_SET_PSIZE(new_bp, size);
+		BP_SET_COMPRESS(new_bp, ZIO_COMPRESS_OFF);
+		BP_SET_CHECKSUM(new_bp,
+		    spa_version(spa) >= SPA_VERSION_SLIM_ZIL
+		    ? ZIO_CHECKSUM_ZILOG2 : ZIO_CHECKSUM_ZILOG);
+		BP_SET_TYPE(new_bp, DMU_OT_INTENT_LOG);
+		BP_SET_LEVEL(new_bp, 0);
+		BP_SET_DEDUP(new_bp, 0);
+		BP_SET_BYTEORDER(new_bp, ZFS_HOST_BYTEORDER);
+	}
+
+	return (error);
+}
+
+/*
+ * Free an intent log block.
+ */
+void
+zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp)
+{
+	ASSERT(BP_GET_TYPE(bp) == DMU_OT_INTENT_LOG);
+	ASSERT(!BP_IS_GANG(bp));
+
+	zio_free(spa, txg, bp);
+}
+
+/*
+ * ==========================================================================
+ * Read and write to physical devices
+ * ==========================================================================
+ */
+static int
+zio_vdev_io_start(zio_t *zio)
+{
+	vdev_t *vd = zio->io_vd;
+	uint64_t align;
+	spa_t *spa = zio->io_spa;
+
+	ASSERT(zio->io_error == 0);
+	ASSERT(zio->io_child_error[ZIO_CHILD_VDEV] == 0);
+
+	if (vd == NULL) {
+		if (!(zio->io_flags & ZIO_FLAG_CONFIG_WRITER))
+			spa_config_enter(spa, SCL_ZIO, zio, RW_READER);
+
+		/*
+		 * The mirror_ops handle multiple DVAs in a single BP.
+		 */
+		return (vdev_mirror_ops.vdev_op_io_start(zio));
+	}
+
+	/*
+	 * We keep track of time-sensitive I/Os so that the scan thread
+	 * can quickly react to certain workloads.  In particular, we care
+	 * about non-scrubbing, top-level reads and writes with the following
+	 * characteristics:
+	 * 	- synchronous writes of user data to non-slog devices
+	 *	- any reads of user data
+	 * When these conditions are met, adjust the timestamp of spa_last_io
+	 * which allows the scan thread to adjust its workload accordingly.
+	 */
+	if (!(zio->io_flags & ZIO_FLAG_SCAN_THREAD) && zio->io_bp != NULL &&
+	    vd == vd->vdev_top && !vd->vdev_islog &&
+	    zio->io_bookmark.zb_objset != DMU_META_OBJSET &&
+	    zio->io_txg != spa_syncing_txg(spa)) {
+		uint64_t old = spa->spa_last_io;
+		uint64_t new = ddi_get_lbolt64();
+		if (old != new)
+			(void) atomic_cas_64(&spa->spa_last_io, old, new);
+	}
+
+	align = 1ULL << vd->vdev_top->vdev_ashift;
+
+	if (P2PHASE(zio->io_size, align) != 0) {
+		uint64_t asize = P2ROUNDUP(zio->io_size, align);
+		char *abuf = zio_buf_alloc(asize);
+		ASSERT(vd == vd->vdev_top);
+		if (zio->io_type == ZIO_TYPE_WRITE) {
+			bcopy(zio->io_data, abuf, zio->io_size);
+			bzero(abuf + zio->io_size, asize - zio->io_size);
+		}
+		zio_push_transform(zio, abuf, asize, asize, zio_subblock);
+	}
+
+	ASSERT(P2PHASE(zio->io_offset, align) == 0);
+	ASSERT(P2PHASE(zio->io_size, align) == 0);
+	VERIFY(zio->io_type != ZIO_TYPE_WRITE || spa_writeable(spa));
+
+	/*
+	 * If this is a repair I/O, and there's no self-healing involved --
+	 * that is, we're just resilvering what we expect to resilver --
+	 * then don't do the I/O unless zio's txg is actually in vd's DTL.
+	 * This prevents spurious resilvering with nested replication.
+	 * For example, given a mirror of mirrors, (A+B)+(C+D), if only
+	 * A is out of date, we'll read from C+D, then use the data to
+	 * resilver A+B -- but we don't actually want to resilver B, just A.
+	 * The top-level mirror has no way to know this, so instead we just
+	 * discard unnecessary repairs as we work our way down the vdev tree.
+	 * The same logic applies to any form of nested replication:
+	 * ditto + mirror, RAID-Z + replacing, etc.  This covers them all.
+	 */
+	if ((zio->io_flags & ZIO_FLAG_IO_REPAIR) &&
+	    !(zio->io_flags & ZIO_FLAG_SELF_HEAL) &&
+	    zio->io_txg != 0 &&	/* not a delegated i/o */
+	    !vdev_dtl_contains(vd, DTL_PARTIAL, zio->io_txg, 1)) {
+		ASSERT(zio->io_type == ZIO_TYPE_WRITE);
+		zio_vdev_io_bypass(zio);
+		return (ZIO_PIPELINE_CONTINUE);
+	}
+
+	if (vd->vdev_ops->vdev_op_leaf &&
+	    (zio->io_type == ZIO_TYPE_READ || zio->io_type == ZIO_TYPE_WRITE)) {
+
+		if (zio->io_type == ZIO_TYPE_READ && vdev_cache_read(zio) == 0)
+			return (ZIO_PIPELINE_CONTINUE);
+
+		if ((zio = vdev_queue_io(zio)) == NULL)
+			return (ZIO_PIPELINE_STOP);
+
+		if (!vdev_accessible(vd, zio)) {
+			zio->io_error = ENXIO;
+			zio_interrupt(zio);
+			return (ZIO_PIPELINE_STOP);
+		}
+	}
+
+	return (vd->vdev_ops->vdev_op_io_start(zio));
+}
+
+static int
+zio_vdev_io_done(zio_t *zio)
+{
+	vdev_t *vd = zio->io_vd;
+	vdev_ops_t *ops = vd ? vd->vdev_ops : &vdev_mirror_ops;
+	boolean_t unexpected_error = B_FALSE;
+
+	if (zio_wait_for_children(zio, ZIO_CHILD_VDEV, ZIO_WAIT_DONE))
+		return (ZIO_PIPELINE_STOP);
+
+	ASSERT(zio->io_type == ZIO_TYPE_READ || zio->io_type == ZIO_TYPE_WRITE);
+
+	if (vd != NULL && vd->vdev_ops->vdev_op_leaf) {
+
+		vdev_queue_io_done(zio);
+
+		if (zio->io_type == ZIO_TYPE_WRITE)
+			vdev_cache_write(zio);
+
+		if (zio_injection_enabled && zio->io_error == 0)
+			zio->io_error = zio_handle_device_injection(vd,
+			    zio, EIO);
+
+		if (zio_injection_enabled && zio->io_error == 0)
+			zio->io_error = zio_handle_label_injection(zio, EIO);
+
+		if (zio->io_error) {
+			if (!vdev_accessible(vd, zio)) {
+				zio->io_error = ENXIO;
+			} else {
+				unexpected_error = B_TRUE;
+			}
+		}
+	}
+
+	ops->vdev_op_io_done(zio);
+
+	if (unexpected_error)
+		VERIFY(vdev_probe(vd, zio) == NULL);
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+/*
+ * For non-raidz ZIOs, we can just copy aside the bad data read from the
+ * disk, and use that to finish the checksum ereport later.
+ */
+static void
+zio_vsd_default_cksum_finish(zio_cksum_report_t *zcr,
+    const void *good_buf)
+{
+	/* no processing needed */
+	zfs_ereport_finish_checksum(zcr, good_buf, zcr->zcr_cbdata, B_FALSE);
+}
+
+/*ARGSUSED*/
+void
+zio_vsd_default_cksum_report(zio_t *zio, zio_cksum_report_t *zcr, void *ignored)
+{
+	void *buf = zio_buf_alloc(zio->io_size);
+
+	bcopy(zio->io_data, buf, zio->io_size);
+
+	zcr->zcr_cbinfo = zio->io_size;
+	zcr->zcr_cbdata = buf;
+	zcr->zcr_finish = zio_vsd_default_cksum_finish;
+	zcr->zcr_free = zio_buf_free;
+}
+
+static int
+zio_vdev_io_assess(zio_t *zio)
+{
+	vdev_t *vd = zio->io_vd;
+
+	if (zio_wait_for_children(zio, ZIO_CHILD_VDEV, ZIO_WAIT_DONE))
+		return (ZIO_PIPELINE_STOP);
+
+	if (vd == NULL && !(zio->io_flags & ZIO_FLAG_CONFIG_WRITER))
+		spa_config_exit(zio->io_spa, SCL_ZIO, zio);
+
+	if (zio->io_vsd != NULL) {
+		zio->io_vsd_ops->vsd_free(zio);
+		zio->io_vsd = NULL;
+	}
+
+	if (zio_injection_enabled && zio->io_error == 0)
+		zio->io_error = zio_handle_fault_injection(zio, EIO);
+
+	/*
+	 * If the I/O failed, determine whether we should attempt to retry it.
+	 *
+	 * On retry, we cut in line in the issue queue, since we don't want
+	 * compression/checksumming/etc. work to prevent our (cheap) IO reissue.
+	 */
+	if (zio->io_error && vd == NULL &&
+	    !(zio->io_flags & (ZIO_FLAG_DONT_RETRY | ZIO_FLAG_IO_RETRY))) {
+		ASSERT(!(zio->io_flags & ZIO_FLAG_DONT_QUEUE));	/* not a leaf */
+		ASSERT(!(zio->io_flags & ZIO_FLAG_IO_BYPASS));	/* not a leaf */
+		zio->io_error = 0;
+		zio->io_flags |= ZIO_FLAG_IO_RETRY |
+		    ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE;
+		zio->io_stage = ZIO_STAGE_VDEV_IO_START >> 1;
+		zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE,
+		    zio_requeue_io_start_cut_in_line);
+		return (ZIO_PIPELINE_STOP);
+	}
+
+	/*
+	 * If we got an error on a leaf device, convert it to ENXIO
+	 * if the device is not accessible at all.
+	 */
+	if (zio->io_error && vd != NULL && vd->vdev_ops->vdev_op_leaf &&
+	    !vdev_accessible(vd, zio))
+		zio->io_error = ENXIO;
+
+	/*
+	 * If we can't write to an interior vdev (mirror or RAID-Z),
+	 * set vdev_cant_write so that we stop trying to allocate from it.
+	 */
+	if (zio->io_error == ENXIO && zio->io_type == ZIO_TYPE_WRITE &&
+	    vd != NULL && !vd->vdev_ops->vdev_op_leaf)
+		vd->vdev_cant_write = B_TRUE;
+
+	if (zio->io_error)
+		zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+void
+zio_vdev_io_reissue(zio_t *zio)
+{
+	ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_START);
+	ASSERT(zio->io_error == 0);
+
+	zio->io_stage >>= 1;
+}
+
+void
+zio_vdev_io_redone(zio_t *zio)
+{
+	ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_DONE);
+
+	zio->io_stage >>= 1;
+}
+
+void
+zio_vdev_io_bypass(zio_t *zio)
+{
+	ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_START);
+	ASSERT(zio->io_error == 0);
+
+	zio->io_flags |= ZIO_FLAG_IO_BYPASS;
+	zio->io_stage = ZIO_STAGE_VDEV_IO_ASSESS >> 1;
+}
+
+/*
+ * ==========================================================================
+ * Generate and verify checksums
+ * ==========================================================================
+ */
+static int
+zio_checksum_generate(zio_t *zio)
+{
+	blkptr_t *bp = zio->io_bp;
+	enum zio_checksum checksum;
+
+	if (bp == NULL) {
+		/*
+		 * This is zio_write_phys().
+		 * We're either generating a label checksum, or none at all.
+		 */
+		checksum = zio->io_prop.zp_checksum;
+
+		if (checksum == ZIO_CHECKSUM_OFF)
+			return (ZIO_PIPELINE_CONTINUE);
+
+		ASSERT(checksum == ZIO_CHECKSUM_LABEL);
+	} else {
+		if (BP_IS_GANG(bp) && zio->io_child_type == ZIO_CHILD_GANG) {
+			ASSERT(!IO_IS_ALLOCATING(zio));
+			checksum = ZIO_CHECKSUM_GANG_HEADER;
+		} else {
+			checksum = BP_GET_CHECKSUM(bp);
+		}
+	}
+
+	zio_checksum_compute(zio, checksum, zio->io_data, zio->io_size);
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+static int
+zio_checksum_verify(zio_t *zio)
+{
+	zio_bad_cksum_t info;
+	blkptr_t *bp = zio->io_bp;
+	int error;
+
+	ASSERT(zio->io_vd != NULL);
+
+	if (bp == NULL) {
+		/*
+		 * This is zio_read_phys().
+		 * We're either verifying a label checksum, or nothing at all.
+		 */
+		if (zio->io_prop.zp_checksum == ZIO_CHECKSUM_OFF)
+			return (ZIO_PIPELINE_CONTINUE);
+
+		ASSERT(zio->io_prop.zp_checksum == ZIO_CHECKSUM_LABEL);
+	}
+
+	if ((error = zio_checksum_error(zio, &info)) != 0) {
+		zio->io_error = error;
+		if (!(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
+			zfs_ereport_start_checksum(zio->io_spa,
+			    zio->io_vd, zio, zio->io_offset,
+			    zio->io_size, NULL, &info);
+		}
+	}
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+/*
+ * Called by RAID-Z to ensure we don't compute the checksum twice.
+ */
+void
+zio_checksum_verified(zio_t *zio)
+{
+	zio->io_pipeline &= ~ZIO_STAGE_CHECKSUM_VERIFY;
+}
+
+/*
+ * ==========================================================================
+ * Error rank.  Error are ranked in the order 0, ENXIO, ECKSUM, EIO, other.
+ * An error of 0 indictes success.  ENXIO indicates whole-device failure,
+ * which may be transient (e.g. unplugged) or permament.  ECKSUM and EIO
+ * indicate errors that are specific to one I/O, and most likely permanent.
+ * Any other error is presumed to be worse because we weren't expecting it.
+ * ==========================================================================
+ */
+int
+zio_worst_error(int e1, int e2)
+{
+	static int zio_error_rank[] = { 0, ENXIO, ECKSUM, EIO };
+	int r1, r2;
+
+	for (r1 = 0; r1 < sizeof (zio_error_rank) / sizeof (int); r1++)
+		if (e1 == zio_error_rank[r1])
+			break;
+
+	for (r2 = 0; r2 < sizeof (zio_error_rank) / sizeof (int); r2++)
+		if (e2 == zio_error_rank[r2])
+			break;
+
+	return (r1 > r2 ? e1 : e2);
+}
+
+/*
+ * ==========================================================================
+ * I/O completion
+ * ==========================================================================
+ */
+static int
+zio_ready(zio_t *zio)
+{
+	blkptr_t *bp = zio->io_bp;
+	zio_t *pio, *pio_next;
+
+	if (zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_READY) ||
+	    zio_wait_for_children(zio, ZIO_CHILD_DDT, ZIO_WAIT_READY))
+		return (ZIO_PIPELINE_STOP);
+
+	if (zio->io_ready) {
+		ASSERT(IO_IS_ALLOCATING(zio));
+		ASSERT(bp->blk_birth == zio->io_txg || BP_IS_HOLE(bp));
+		ASSERT(zio->io_children[ZIO_CHILD_GANG][ZIO_WAIT_READY] == 0);
+
+		zio->io_ready(zio);
+	}
+
+	if (bp != NULL && bp != &zio->io_bp_copy)
+		zio->io_bp_copy = *bp;
+
+	if (zio->io_error)
+		zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+
+	mutex_enter(&zio->io_lock);
+	zio->io_state[ZIO_WAIT_READY] = 1;
+	pio = zio_walk_parents(zio);
+	mutex_exit(&zio->io_lock);
+
+	/*
+	 * As we notify zio's parents, new parents could be added.
+	 * New parents go to the head of zio's io_parent_list, however,
+	 * so we will (correctly) not notify them.  The remainder of zio's
+	 * io_parent_list, from 'pio_next' onward, cannot change because
+	 * all parents must wait for us to be done before they can be done.
+	 */
+	for (; pio != NULL; pio = pio_next) {
+		pio_next = zio_walk_parents(zio);
+		zio_notify_parent(pio, zio, ZIO_WAIT_READY);
+	}
+
+	if (zio->io_flags & ZIO_FLAG_NODATA) {
+		if (BP_IS_GANG(bp)) {
+			zio->io_flags &= ~ZIO_FLAG_NODATA;
+		} else {
+			ASSERT((uintptr_t)zio->io_data < SPA_MAXBLOCKSIZE);
+			zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES;
+		}
+	}
+
+	if (zio_injection_enabled &&
+	    zio->io_spa->spa_syncing_txg == zio->io_txg)
+		zio_handle_ignored_writes(zio);
+
+	return (ZIO_PIPELINE_CONTINUE);
+}
+
+static int
+zio_done(zio_t *zio)
+{
+	spa_t *spa = zio->io_spa;
+	zio_t *lio = zio->io_logical;
+	blkptr_t *bp = zio->io_bp;
+	vdev_t *vd = zio->io_vd;
+	uint64_t psize = zio->io_size;
+	zio_t *pio, *pio_next;
+
+	/*
+	 * If our children haven't all completed,
+	 * wait for them and then repeat this pipeline stage.
+	 */
+	if (zio_wait_for_children(zio, ZIO_CHILD_VDEV, ZIO_WAIT_DONE) ||
+	    zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_DONE) ||
+	    zio_wait_for_children(zio, ZIO_CHILD_DDT, ZIO_WAIT_DONE) ||
+	    zio_wait_for_children(zio, ZIO_CHILD_LOGICAL, ZIO_WAIT_DONE))
+		return (ZIO_PIPELINE_STOP);
+
+	for (int c = 0; c < ZIO_CHILD_TYPES; c++)
+		for (int w = 0; w < ZIO_WAIT_TYPES; w++)
+			ASSERT(zio->io_children[c][w] == 0);
+
+	if (bp != NULL) {
+		ASSERT(bp->blk_pad[0] == 0);
+		ASSERT(bp->blk_pad[1] == 0);
+		ASSERT(bcmp(bp, &zio->io_bp_copy, sizeof (blkptr_t)) == 0 ||
+		    (bp == zio_unique_parent(zio)->io_bp));
+		if (zio->io_type == ZIO_TYPE_WRITE && !BP_IS_HOLE(bp) &&
+		    zio->io_bp_override == NULL &&
+		    !(zio->io_flags & ZIO_FLAG_IO_REPAIR)) {
+			ASSERT(!BP_SHOULD_BYTESWAP(bp));
+			ASSERT3U(zio->io_prop.zp_copies, <=, BP_GET_NDVAS(bp));
+			ASSERT(BP_COUNT_GANG(bp) == 0 ||
+			    (BP_COUNT_GANG(bp) == BP_GET_NDVAS(bp)));
+		}
+	}
+
+	/*
+	 * If there were child vdev/gang/ddt errors, they apply to us now.
+	 */
+	zio_inherit_child_errors(zio, ZIO_CHILD_VDEV);
+	zio_inherit_child_errors(zio, ZIO_CHILD_GANG);
+	zio_inherit_child_errors(zio, ZIO_CHILD_DDT);
+
+	/*
+	 * If the I/O on the transformed data was successful, generate any
+	 * checksum reports now while we still have the transformed data.
+	 */
+	if (zio->io_error == 0) {
+		while (zio->io_cksum_report != NULL) {
+			zio_cksum_report_t *zcr = zio->io_cksum_report;
+			uint64_t align = zcr->zcr_align;
+			uint64_t asize = P2ROUNDUP(psize, align);
+			char *abuf = zio->io_data;
+
+			if (asize != psize) {
+				abuf = zio_buf_alloc(asize);
+				bcopy(zio->io_data, abuf, psize);
+				bzero(abuf + psize, asize - psize);
+			}
+
+			zio->io_cksum_report = zcr->zcr_next;
+			zcr->zcr_next = NULL;
+			zcr->zcr_finish(zcr, abuf);
+			zfs_ereport_free_checksum(zcr);
+
+			if (asize != psize)
+				zio_buf_free(abuf, asize);
+		}
+	}
+
+	zio_pop_transforms(zio);	/* note: may set zio->io_error */
+
+	vdev_stat_update(zio, psize);
+
+	if (zio->io_error) {
+		/*
+		 * If this I/O is attached to a particular vdev,
+		 * generate an error message describing the I/O failure
+		 * at the block level.  We ignore these errors if the
+		 * device is currently unavailable.
+		 */
+		if (zio->io_error != ECKSUM && vd != NULL && !vdev_is_dead(vd))
+			zfs_ereport_post(FM_EREPORT_ZFS_IO, spa, vd, zio, 0, 0);
+
+		if ((zio->io_error == EIO || !(zio->io_flags &
+		    (ZIO_FLAG_SPECULATIVE | ZIO_FLAG_DONT_PROPAGATE))) &&
+		    zio == lio) {
+			/*
+			 * For logical I/O requests, tell the SPA to log the
+			 * error and generate a logical data ereport.
+			 */
+			spa_log_error(spa, zio);
+			zfs_ereport_post(FM_EREPORT_ZFS_DATA, spa, NULL, zio,
+			    0, 0);
+		}
+	}
+
+	if (zio->io_error && zio == lio) {
+		/*
+		 * Determine whether zio should be reexecuted.  This will
+		 * propagate all the way to the root via zio_notify_parent().
+		 */
+		ASSERT(vd == NULL && bp != NULL);
+		ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+
+		if (IO_IS_ALLOCATING(zio) &&
+		    !(zio->io_flags & ZIO_FLAG_CANFAIL)) {
+			if (zio->io_error != ENOSPC)
+				zio->io_reexecute |= ZIO_REEXECUTE_NOW;
+			else
+				zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND;
+		}
+
+		if ((zio->io_type == ZIO_TYPE_READ ||
+		    zio->io_type == ZIO_TYPE_FREE) &&
+		    !(zio->io_flags & ZIO_FLAG_SCAN_THREAD) &&
+		    zio->io_error == ENXIO &&
+		    spa_load_state(spa) == SPA_LOAD_NONE &&
+		    spa_get_failmode(spa) != ZIO_FAILURE_MODE_CONTINUE)
+			zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND;
+
+		if (!(zio->io_flags & ZIO_FLAG_CANFAIL) && !zio->io_reexecute)
+			zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND;
+
+		/*
+		 * Here is a possibly good place to attempt to do
+		 * either combinatorial reconstruction or error correction
+		 * based on checksums.  It also might be a good place
+		 * to send out preliminary ereports before we suspend
+		 * processing.
+		 */
+	}
+
+	/*
+	 * If there were logical child errors, they apply to us now.
+	 * We defer this until now to avoid conflating logical child
+	 * errors with errors that happened to the zio itself when
+	 * updating vdev stats and reporting FMA events above.
+	 */
+	zio_inherit_child_errors(zio, ZIO_CHILD_LOGICAL);
+
+	if ((zio->io_error || zio->io_reexecute) &&
+	    IO_IS_ALLOCATING(zio) && zio->io_gang_leader == zio &&
+	    !(zio->io_flags & ZIO_FLAG_IO_REWRITE))
+		zio_dva_unallocate(zio, zio->io_gang_tree, bp);
+
+	zio_gang_tree_free(&zio->io_gang_tree);
+
+	/*
+	 * Godfather I/Os should never suspend.
+	 */
+	if ((zio->io_flags & ZIO_FLAG_GODFATHER) &&
+	    (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND))
+		zio->io_reexecute = 0;
+
+	if (zio->io_reexecute) {
+		/*
+		 * This is a logical I/O that wants to reexecute.
+		 *
+		 * Reexecute is top-down.  When an i/o fails, if it's not
+		 * the root, it simply notifies its parent and sticks around.
+		 * The parent, seeing that it still has children in zio_done(),
+		 * does the same.  This percolates all the way up to the root.
+		 * The root i/o will reexecute or suspend the entire tree.
+		 *
+		 * This approach ensures that zio_reexecute() honors
+		 * all the original i/o dependency relationships, e.g.
+		 * parents not executing until children are ready.
+		 */
+		ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+
+		zio->io_gang_leader = NULL;
+
+		mutex_enter(&zio->io_lock);
+		zio->io_state[ZIO_WAIT_DONE] = 1;
+		mutex_exit(&zio->io_lock);
+
+		/*
+		 * "The Godfather" I/O monitors its children but is
+		 * not a true parent to them. It will track them through
+		 * the pipeline but severs its ties whenever they get into
+		 * trouble (e.g. suspended). This allows "The Godfather"
+		 * I/O to return status without blocking.
+		 */
+		for (pio = zio_walk_parents(zio); pio != NULL; pio = pio_next) {
+			zio_link_t *zl = zio->io_walk_link;
+			pio_next = zio_walk_parents(zio);
+
+			if ((pio->io_flags & ZIO_FLAG_GODFATHER) &&
+			    (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND)) {
+				zio_remove_child(pio, zio, zl);
+				zio_notify_parent(pio, zio, ZIO_WAIT_DONE);
+			}
+		}
+
+		if ((pio = zio_unique_parent(zio)) != NULL) {
+			/*
+			 * We're not a root i/o, so there's nothing to do
+			 * but notify our parent.  Don't propagate errors
+			 * upward since we haven't permanently failed yet.
+			 */
+			ASSERT(!(zio->io_flags & ZIO_FLAG_GODFATHER));
+			zio->io_flags |= ZIO_FLAG_DONT_PROPAGATE;
+			zio_notify_parent(pio, zio, ZIO_WAIT_DONE);
+		} else if (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND) {
+			/*
+			 * We'd fail again if we reexecuted now, so suspend
+			 * until conditions improve (e.g. device comes online).
+			 */
+			zio_suspend(spa, zio);
+		} else {
+			/*
+			 * Reexecution is potentially a huge amount of work.
+			 * Hand it off to the otherwise-unused claim taskq.
+			 */
+			(void) taskq_dispatch(
+			    spa->spa_zio_taskq[ZIO_TYPE_CLAIM][ZIO_TASKQ_ISSUE],
+			    (task_func_t *)zio_reexecute, zio, TQ_SLEEP);
+		}
+		return (ZIO_PIPELINE_STOP);
+	}
+
+	ASSERT(zio->io_child_count == 0);
+	ASSERT(zio->io_reexecute == 0);
+	ASSERT(zio->io_error == 0 || (zio->io_flags & ZIO_FLAG_CANFAIL));
+
+	/*
+	 * Report any checksum errors, since the I/O is complete.
+	 */
+	while (zio->io_cksum_report != NULL) {
+		zio_cksum_report_t *zcr = zio->io_cksum_report;
+		zio->io_cksum_report = zcr->zcr_next;
+		zcr->zcr_next = NULL;
+		zcr->zcr_finish(zcr, NULL);
+		zfs_ereport_free_checksum(zcr);
+	}
+
+	/*
+	 * It is the responsibility of the done callback to ensure that this
+	 * particular zio is no longer discoverable for adoption, and as
+	 * such, cannot acquire any new parents.
+	 */
+	if (zio->io_done)
+		zio->io_done(zio);
+
+	mutex_enter(&zio->io_lock);
+	zio->io_state[ZIO_WAIT_DONE] = 1;
+	mutex_exit(&zio->io_lock);
+
+	for (pio = zio_walk_parents(zio); pio != NULL; pio = pio_next) {
+		zio_link_t *zl = zio->io_walk_link;
+		pio_next = zio_walk_parents(zio);
+		zio_remove_child(pio, zio, zl);
+		zio_notify_parent(pio, zio, ZIO_WAIT_DONE);
+	}
+
+	if (zio->io_waiter != NULL) {
+		mutex_enter(&zio->io_lock);
+		zio->io_executor = NULL;
+		cv_broadcast(&zio->io_cv);
+		mutex_exit(&zio->io_lock);
+	} else {
+		zio_destroy(zio);
+	}
+
+	return (ZIO_PIPELINE_STOP);
+}
+
+/*
+ * ==========================================================================
+ * I/O pipeline definition
+ * ==========================================================================
+ */
+static zio_pipe_stage_t *zio_pipeline[] = {
+	NULL,
+	zio_read_bp_init,
+	zio_free_bp_init,
+	zio_issue_async,
+	zio_write_bp_init,
+	zio_checksum_generate,
+	zio_ddt_read_start,
+	zio_ddt_read_done,
+	zio_ddt_write,
+	zio_ddt_free,
+	zio_gang_assemble,
+	zio_gang_issue,
+	zio_dva_allocate,
+	zio_dva_free,
+	zio_dva_claim,
+	zio_ready,
+	zio_vdev_io_start,
+	zio_vdev_io_done,
+	zio_vdev_io_assess,
+	zio_checksum_verify,
+	zio_done
+};
diff --git a/uts/common/fs/zfs/zio_checksum.c b/uts/common/fs/zfs/zio_checksum.c
new file mode 100644
index 000000000000..c8fe20f2eb4e
--- /dev/null
+++ b/uts/common/fs/zfs/zio_checksum.c
@@ -0,0 +1,274 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/zio.h>
+#include <sys/zio_checksum.h>
+#include <sys/zil.h>
+#include <zfs_fletcher.h>
+
+/*
+ * Checksum vectors.
+ *
+ * In the SPA, everything is checksummed.  We support checksum vectors
+ * for three distinct reasons:
+ *
+ *   1. Different kinds of data need different levels of protection.
+ *	For SPA metadata, we always want a very strong checksum.
+ *	For user data, we let users make the trade-off between speed
+ *	and checksum strength.
+ *
+ *   2. Cryptographic hash and MAC algorithms are an area of active research.
+ *	It is likely that in future hash functions will be at least as strong
+ *	as current best-of-breed, and may be substantially faster as well.
+ *	We want the ability to take advantage of these new hashes as soon as
+ *	they become available.
+ *
+ *   3. If someone develops hardware that can compute a strong hash quickly,
+ *	we want the ability to take advantage of that hardware.
+ *
+ * Of course, we don't want a checksum upgrade to invalidate existing
+ * data, so we store the checksum *function* in eight bits of the bp.
+ * This gives us room for up to 256 different checksum functions.
+ *
+ * When writing a block, we always checksum it with the latest-and-greatest
+ * checksum function of the appropriate strength.  When reading a block,
+ * we compare the expected checksum against the actual checksum, which we
+ * compute via the checksum function specified by BP_GET_CHECKSUM(bp).
+ */
+
+/*ARGSUSED*/
+static void
+zio_checksum_off(const void *buf, uint64_t size, zio_cksum_t *zcp)
+{
+	ZIO_SET_CHECKSUM(zcp, 0, 0, 0, 0);
+}
+
+zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS] = {
+	{{NULL,			NULL},			0, 0, 0, "inherit"},
+	{{NULL,			NULL},			0, 0, 0, "on"},
+	{{zio_checksum_off,	zio_checksum_off},	0, 0, 0, "off"},
+	{{zio_checksum_SHA256,	zio_checksum_SHA256},	1, 1, 0, "label"},
+	{{zio_checksum_SHA256,	zio_checksum_SHA256},	1, 1, 0, "gang_header"},
+	{{fletcher_2_native,	fletcher_2_byteswap},	0, 1, 0, "zilog"},
+	{{fletcher_2_native,	fletcher_2_byteswap},	0, 0, 0, "fletcher2"},
+	{{fletcher_4_native,	fletcher_4_byteswap},	1, 0, 0, "fletcher4"},
+	{{zio_checksum_SHA256,	zio_checksum_SHA256},	1, 0, 1, "sha256"},
+	{{fletcher_4_native,	fletcher_4_byteswap},	0, 1, 0, "zilog2"},
+};
+
+enum zio_checksum
+zio_checksum_select(enum zio_checksum child, enum zio_checksum parent)
+{
+	ASSERT(child < ZIO_CHECKSUM_FUNCTIONS);
+	ASSERT(parent < ZIO_CHECKSUM_FUNCTIONS);
+	ASSERT(parent != ZIO_CHECKSUM_INHERIT && parent != ZIO_CHECKSUM_ON);
+
+	if (child == ZIO_CHECKSUM_INHERIT)
+		return (parent);
+
+	if (child == ZIO_CHECKSUM_ON)
+		return (ZIO_CHECKSUM_ON_VALUE);
+
+	return (child);
+}
+
+enum zio_checksum
+zio_checksum_dedup_select(spa_t *spa, enum zio_checksum child,
+    enum zio_checksum parent)
+{
+	ASSERT((child & ZIO_CHECKSUM_MASK) < ZIO_CHECKSUM_FUNCTIONS);
+	ASSERT((parent & ZIO_CHECKSUM_MASK) < ZIO_CHECKSUM_FUNCTIONS);
+	ASSERT(parent != ZIO_CHECKSUM_INHERIT && parent != ZIO_CHECKSUM_ON);
+
+	if (child == ZIO_CHECKSUM_INHERIT)
+		return (parent);
+
+	if (child == ZIO_CHECKSUM_ON)
+		return (spa_dedup_checksum(spa));
+
+	if (child == (ZIO_CHECKSUM_ON | ZIO_CHECKSUM_VERIFY))
+		return (spa_dedup_checksum(spa) | ZIO_CHECKSUM_VERIFY);
+
+	ASSERT(zio_checksum_table[child & ZIO_CHECKSUM_MASK].ci_dedup ||
+	    (child & ZIO_CHECKSUM_VERIFY) || child == ZIO_CHECKSUM_OFF);
+
+	return (child);
+}
+
+/*
+ * Set the external verifier for a gang block based on <vdev, offset, txg>,
+ * a tuple which is guaranteed to be unique for the life of the pool.
+ */
+static void
+zio_checksum_gang_verifier(zio_cksum_t *zcp, blkptr_t *bp)
+{
+	dva_t *dva = BP_IDENTITY(bp);
+	uint64_t txg = BP_PHYSICAL_BIRTH(bp);
+
+	ASSERT(BP_IS_GANG(bp));
+
+	ZIO_SET_CHECKSUM(zcp, DVA_GET_VDEV(dva), DVA_GET_OFFSET(dva), txg, 0);
+}
+
+/*
+ * Set the external verifier for a label block based on its offset.
+ * The vdev is implicit, and the txg is unknowable at pool open time --
+ * hence the logic in vdev_uberblock_load() to find the most recent copy.
+ */
+static void
+zio_checksum_label_verifier(zio_cksum_t *zcp, uint64_t offset)
+{
+	ZIO_SET_CHECKSUM(zcp, offset, 0, 0, 0);
+}
+
+/*
+ * Generate the checksum.
+ */
+void
+zio_checksum_compute(zio_t *zio, enum zio_checksum checksum,
+	void *data, uint64_t size)
+{
+	blkptr_t *bp = zio->io_bp;
+	uint64_t offset = zio->io_offset;
+	zio_checksum_info_t *ci = &zio_checksum_table[checksum];
+	zio_cksum_t cksum;
+
+	ASSERT((uint_t)checksum < ZIO_CHECKSUM_FUNCTIONS);
+	ASSERT(ci->ci_func[0] != NULL);
+
+	if (ci->ci_eck) {
+		zio_eck_t *eck;
+
+		if (checksum == ZIO_CHECKSUM_ZILOG2) {
+			zil_chain_t *zilc = data;
+
+			size = P2ROUNDUP_TYPED(zilc->zc_nused, ZIL_MIN_BLKSZ,
+			    uint64_t);
+			eck = &zilc->zc_eck;
+		} else {
+			eck = (zio_eck_t *)((char *)data + size) - 1;
+		}
+		if (checksum == ZIO_CHECKSUM_GANG_HEADER)
+			zio_checksum_gang_verifier(&eck->zec_cksum, bp);
+		else if (checksum == ZIO_CHECKSUM_LABEL)
+			zio_checksum_label_verifier(&eck->zec_cksum, offset);
+		else
+			bp->blk_cksum = eck->zec_cksum;
+		eck->zec_magic = ZEC_MAGIC;
+		ci->ci_func[0](data, size, &cksum);
+		eck->zec_cksum = cksum;
+	} else {
+		ci->ci_func[0](data, size, &bp->blk_cksum);
+	}
+}
+
+int
+zio_checksum_error(zio_t *zio, zio_bad_cksum_t *info)
+{
+	blkptr_t *bp = zio->io_bp;
+	uint_t checksum = (bp == NULL ? zio->io_prop.zp_checksum :
+	    (BP_IS_GANG(bp) ? ZIO_CHECKSUM_GANG_HEADER : BP_GET_CHECKSUM(bp)));
+	int byteswap;
+	int error;
+	uint64_t size = (bp == NULL ? zio->io_size :
+	    (BP_IS_GANG(bp) ? SPA_GANGBLOCKSIZE : BP_GET_PSIZE(bp)));
+	uint64_t offset = zio->io_offset;
+	void *data = zio->io_data;
+	zio_checksum_info_t *ci = &zio_checksum_table[checksum];
+	zio_cksum_t actual_cksum, expected_cksum, verifier;
+
+	if (checksum >= ZIO_CHECKSUM_FUNCTIONS || ci->ci_func[0] == NULL)
+		return (EINVAL);
+
+	if (ci->ci_eck) {
+		zio_eck_t *eck;
+
+		if (checksum == ZIO_CHECKSUM_ZILOG2) {
+			zil_chain_t *zilc = data;
+			uint64_t nused;
+
+			eck = &zilc->zc_eck;
+			if (eck->zec_magic == ZEC_MAGIC)
+				nused = zilc->zc_nused;
+			else if (eck->zec_magic == BSWAP_64(ZEC_MAGIC))
+				nused = BSWAP_64(zilc->zc_nused);
+			else
+				return (ECKSUM);
+
+			if (nused > size)
+				return (ECKSUM);
+
+			size = P2ROUNDUP_TYPED(nused, ZIL_MIN_BLKSZ, uint64_t);
+		} else {
+			eck = (zio_eck_t *)((char *)data + size) - 1;
+		}
+
+		if (checksum == ZIO_CHECKSUM_GANG_HEADER)
+			zio_checksum_gang_verifier(&verifier, bp);
+		else if (checksum == ZIO_CHECKSUM_LABEL)
+			zio_checksum_label_verifier(&verifier, offset);
+		else
+			verifier = bp->blk_cksum;
+
+		byteswap = (eck->zec_magic == BSWAP_64(ZEC_MAGIC));
+
+		if (byteswap)
+			byteswap_uint64_array(&verifier, sizeof (zio_cksum_t));
+
+		expected_cksum = eck->zec_cksum;
+		eck->zec_cksum = verifier;
+		ci->ci_func[byteswap](data, size, &actual_cksum);
+		eck->zec_cksum = expected_cksum;
+
+		if (byteswap)
+			byteswap_uint64_array(&expected_cksum,
+			    sizeof (zio_cksum_t));
+	} else {
+		ASSERT(!BP_IS_GANG(bp));
+		byteswap = BP_SHOULD_BYTESWAP(bp);
+		expected_cksum = bp->blk_cksum;
+		ci->ci_func[byteswap](data, size, &actual_cksum);
+	}
+
+	info->zbc_expected = expected_cksum;
+	info->zbc_actual = actual_cksum;
+	info->zbc_checksum_name = ci->ci_name;
+	info->zbc_byteswapped = byteswap;
+	info->zbc_injected = 0;
+	info->zbc_has_cksum = 1;
+
+	if (!ZIO_CHECKSUM_EQUAL(actual_cksum, expected_cksum))
+		return (ECKSUM);
+
+	if (zio_injection_enabled && !zio->io_error &&
+	    (error = zio_handle_fault_injection(zio, ECKSUM)) != 0) {
+
+		info->zbc_injected = 1;
+		return (error);
+	}
+
+	return (0);
+}
diff --git a/uts/common/fs/zfs/zio_compress.c b/uts/common/fs/zfs/zio_compress.c
new file mode 100644
index 000000000000..f148977c4468
--- /dev/null
+++ b/uts/common/fs/zfs/zio_compress.c
@@ -0,0 +1,132 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/compress.h>
+#include <sys/spa.h>
+#include <sys/zio.h>
+#include <sys/zio_compress.h>
+
+/*
+ * Compression vectors.
+ */
+
+zio_compress_info_t zio_compress_table[ZIO_COMPRESS_FUNCTIONS] = {
+	{NULL,			NULL,			0,	"inherit"},
+	{NULL,			NULL,			0,	"on"},
+	{NULL,			NULL,			0,	"uncompressed"},
+	{lzjb_compress,		lzjb_decompress,	0,	"lzjb"},
+	{NULL,			NULL,			0,	"empty"},
+	{gzip_compress,		gzip_decompress,	1,	"gzip-1"},
+	{gzip_compress,		gzip_decompress,	2,	"gzip-2"},
+	{gzip_compress,		gzip_decompress,	3,	"gzip-3"},
+	{gzip_compress,		gzip_decompress,	4,	"gzip-4"},
+	{gzip_compress,		gzip_decompress,	5,	"gzip-5"},
+	{gzip_compress,		gzip_decompress,	6,	"gzip-6"},
+	{gzip_compress,		gzip_decompress,	7,	"gzip-7"},
+	{gzip_compress,		gzip_decompress,	8,	"gzip-8"},
+	{gzip_compress,		gzip_decompress,	9,	"gzip-9"},
+	{zle_compress,		zle_decompress,		64,	"zle"},
+};
+
+enum zio_compress
+zio_compress_select(enum zio_compress child, enum zio_compress parent)
+{
+	ASSERT(child < ZIO_COMPRESS_FUNCTIONS);
+	ASSERT(parent < ZIO_COMPRESS_FUNCTIONS);
+	ASSERT(parent != ZIO_COMPRESS_INHERIT && parent != ZIO_COMPRESS_ON);
+
+	if (child == ZIO_COMPRESS_INHERIT)
+		return (parent);
+
+	if (child == ZIO_COMPRESS_ON)
+		return (ZIO_COMPRESS_ON_VALUE);
+
+	return (child);
+}
+
+size_t
+zio_compress_data(enum zio_compress c, void *src, void *dst, size_t s_len)
+{
+	uint64_t *word, *word_end;
+	size_t c_len, d_len, r_len;
+	zio_compress_info_t *ci = &zio_compress_table[c];
+
+	ASSERT((uint_t)c < ZIO_COMPRESS_FUNCTIONS);
+	ASSERT((uint_t)c == ZIO_COMPRESS_EMPTY || ci->ci_compress != NULL);
+
+	/*
+	 * If the data is all zeroes, we don't even need to allocate
+	 * a block for it.  We indicate this by returning zero size.
+	 */
+	word_end = (uint64_t *)((char *)src + s_len);
+	for (word = src; word < word_end; word++)
+		if (*word != 0)
+			break;
+
+	if (word == word_end)
+		return (0);
+
+	if (c == ZIO_COMPRESS_EMPTY)
+		return (s_len);
+
+	/* Compress at least 12.5% */
+	d_len = P2ALIGN(s_len - (s_len >> 3), (size_t)SPA_MINBLOCKSIZE);
+	if (d_len == 0)
+		return (s_len);
+
+	c_len = ci->ci_compress(src, dst, s_len, d_len, ci->ci_level);
+
+	if (c_len > d_len)
+		return (s_len);
+
+	/*
+	 * Cool.  We compressed at least as much as we were hoping to.
+	 * For both security and repeatability, pad out the last sector.
+	 */
+	r_len = P2ROUNDUP(c_len, (size_t)SPA_MINBLOCKSIZE);
+	if (r_len > c_len) {
+		bzero((char *)dst + c_len, r_len - c_len);
+		c_len = r_len;
+	}
+
+	ASSERT3U(c_len, <=, d_len);
+	ASSERT(P2PHASE(c_len, (size_t)SPA_MINBLOCKSIZE) == 0);
+
+	return (c_len);
+}
+
+int
+zio_decompress_data(enum zio_compress c, void *src, void *dst,
+    size_t s_len, size_t d_len)
+{
+	zio_compress_info_t *ci = &zio_compress_table[c];
+
+	if ((uint_t)c >= ZIO_COMPRESS_FUNCTIONS || ci->ci_decompress == NULL)
+		return (EINVAL);
+
+	return (ci->ci_decompress(src, dst, s_len, d_len, ci->ci_level));
+}
diff --git a/uts/common/fs/zfs/zio_inject.c b/uts/common/fs/zfs/zio_inject.c
new file mode 100644
index 000000000000..9ae7d1f697fd
--- /dev/null
+++ b/uts/common/fs/zfs/zio_inject.c
@@ -0,0 +1,515 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * ZFS fault injection
+ *
+ * To handle fault injection, we keep track of a series of zinject_record_t
+ * structures which describe which logical block(s) should be injected with a
+ * fault.  These are kept in a global list.  Each record corresponds to a given
+ * spa_t and maintains a special hold on the spa_t so that it cannot be deleted
+ * or exported while the injection record exists.
+ *
+ * Device level injection is done using the 'zi_guid' field.  If this is set, it
+ * means that the error is destined for a particular device, not a piece of
+ * data.
+ *
+ * This is a rather poor data structure and algorithm, but we don't expect more
+ * than a few faults at any one time, so it should be sufficient for our needs.
+ */
+
+#include <sys/arc.h>
+#include <sys/zio_impl.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/vdev_impl.h>
+#include <sys/dmu_objset.h>
+#include <sys/fs/zfs.h>
+
+uint32_t zio_injection_enabled;
+
+typedef struct inject_handler {
+	int			zi_id;
+	spa_t			*zi_spa;
+	zinject_record_t	zi_record;
+	list_node_t		zi_link;
+} inject_handler_t;
+
+static list_t inject_handlers;
+static krwlock_t inject_lock;
+static int inject_next_id = 1;
+
+/*
+ * Returns true if the given record matches the I/O in progress.
+ */
+static boolean_t
+zio_match_handler(zbookmark_t *zb, uint64_t type,
+    zinject_record_t *record, int error)
+{
+	/*
+	 * Check for a match against the MOS, which is based on type
+	 */
+	if (zb->zb_objset == DMU_META_OBJSET &&
+	    record->zi_objset == DMU_META_OBJSET &&
+	    record->zi_object == DMU_META_DNODE_OBJECT) {
+		if (record->zi_type == DMU_OT_NONE ||
+		    type == record->zi_type)
+			return (record->zi_freq == 0 ||
+			    spa_get_random(100) < record->zi_freq);
+		else
+			return (B_FALSE);
+	}
+
+	/*
+	 * Check for an exact match.
+	 */
+	if (zb->zb_objset == record->zi_objset &&
+	    zb->zb_object == record->zi_object &&
+	    zb->zb_level == record->zi_level &&
+	    zb->zb_blkid >= record->zi_start &&
+	    zb->zb_blkid <= record->zi_end &&
+	    error == record->zi_error)
+		return (record->zi_freq == 0 ||
+		    spa_get_random(100) < record->zi_freq);
+
+	return (B_FALSE);
+}
+
+/*
+ * Panic the system when a config change happens in the function
+ * specified by tag.
+ */
+void
+zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type)
+{
+	inject_handler_t *handler;
+
+	rw_enter(&inject_lock, RW_READER);
+
+	for (handler = list_head(&inject_handlers); handler != NULL;
+	    handler = list_next(&inject_handlers, handler)) {
+
+		if (spa != handler->zi_spa)
+			continue;
+
+		if (handler->zi_record.zi_type == type &&
+		    strcmp(tag, handler->zi_record.zi_func) == 0)
+			panic("Panic requested in function %s\n", tag);
+	}
+
+	rw_exit(&inject_lock);
+}
+
+/*
+ * Determine if the I/O in question should return failure.  Returns the errno
+ * to be returned to the caller.
+ */
+int
+zio_handle_fault_injection(zio_t *zio, int error)
+{
+	int ret = 0;
+	inject_handler_t *handler;
+
+	/*
+	 * Ignore I/O not associated with any logical data.
+	 */
+	if (zio->io_logical == NULL)
+		return (0);
+
+	/*
+	 * Currently, we only support fault injection on reads.
+	 */
+	if (zio->io_type != ZIO_TYPE_READ)
+		return (0);
+
+	rw_enter(&inject_lock, RW_READER);
+
+	for (handler = list_head(&inject_handlers); handler != NULL;
+	    handler = list_next(&inject_handlers, handler)) {
+
+		/* Ignore errors not destined for this pool */
+		if (zio->io_spa != handler->zi_spa)
+			continue;
+
+		/* Ignore device errors and panic injection */
+		if (handler->zi_record.zi_guid != 0 ||
+		    handler->zi_record.zi_func[0] != '\0' ||
+		    handler->zi_record.zi_duration != 0)
+			continue;
+
+		/* If this handler matches, return EIO */
+		if (zio_match_handler(&zio->io_logical->io_bookmark,
+		    zio->io_bp ? BP_GET_TYPE(zio->io_bp) : DMU_OT_NONE,
+		    &handler->zi_record, error)) {
+			ret = error;
+			break;
+		}
+	}
+
+	rw_exit(&inject_lock);
+
+	return (ret);
+}
+
+/*
+ * Determine if the zio is part of a label update and has an injection
+ * handler associated with that portion of the label. Currently, we
+ * allow error injection in either the nvlist or the uberblock region of
+ * of the vdev label.
+ */
+int
+zio_handle_label_injection(zio_t *zio, int error)
+{
+	inject_handler_t *handler;
+	vdev_t *vd = zio->io_vd;
+	uint64_t offset = zio->io_offset;
+	int label;
+	int ret = 0;
+
+	if (offset >= VDEV_LABEL_START_SIZE &&
+	    offset < vd->vdev_psize - VDEV_LABEL_END_SIZE)
+		return (0);
+
+	rw_enter(&inject_lock, RW_READER);
+
+	for (handler = list_head(&inject_handlers); handler != NULL;
+	    handler = list_next(&inject_handlers, handler)) {
+		uint64_t start = handler->zi_record.zi_start;
+		uint64_t end = handler->zi_record.zi_end;
+
+		/* Ignore device only faults or panic injection */
+		if (handler->zi_record.zi_start == 0 ||
+		    handler->zi_record.zi_func[0] != '\0' ||
+		    handler->zi_record.zi_duration != 0)
+			continue;
+
+		/*
+		 * The injection region is the relative offsets within a
+		 * vdev label. We must determine the label which is being
+		 * updated and adjust our region accordingly.
+		 */
+		label = vdev_label_number(vd->vdev_psize, offset);
+		start = vdev_label_offset(vd->vdev_psize, label, start);
+		end = vdev_label_offset(vd->vdev_psize, label, end);
+
+		if (zio->io_vd->vdev_guid == handler->zi_record.zi_guid &&
+		    (offset >= start && offset <= end)) {
+			ret = error;
+			break;
+		}
+	}
+	rw_exit(&inject_lock);
+	return (ret);
+}
+
+
+int
+zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error)
+{
+	inject_handler_t *handler;
+	int ret = 0;
+
+	/*
+	 * We skip over faults in the labels unless it's during
+	 * device open (i.e. zio == NULL).
+	 */
+	if (zio != NULL) {
+		uint64_t offset = zio->io_offset;
+
+		if (offset < VDEV_LABEL_START_SIZE ||
+		    offset >= vd->vdev_psize - VDEV_LABEL_END_SIZE)
+			return (0);
+	}
+
+	rw_enter(&inject_lock, RW_READER);
+
+	for (handler = list_head(&inject_handlers); handler != NULL;
+	    handler = list_next(&inject_handlers, handler)) {
+
+		/*
+		 * Ignore label specific faults, panic injection
+		 * or fake writes
+		 */
+		if (handler->zi_record.zi_start != 0 ||
+		    handler->zi_record.zi_func[0] != '\0' ||
+		    handler->zi_record.zi_duration != 0)
+			continue;
+
+		if (vd->vdev_guid == handler->zi_record.zi_guid) {
+			if (handler->zi_record.zi_failfast &&
+			    (zio == NULL || (zio->io_flags &
+			    (ZIO_FLAG_IO_RETRY | ZIO_FLAG_TRYHARD)))) {
+				continue;
+			}
+
+			/* Handle type specific I/O failures */
+			if (zio != NULL &&
+			    handler->zi_record.zi_iotype != ZIO_TYPES &&
+			    handler->zi_record.zi_iotype != zio->io_type)
+				continue;
+
+			if (handler->zi_record.zi_error == error) {
+				/*
+				 * For a failed open, pretend like the device
+				 * has gone away.
+				 */
+				if (error == ENXIO)
+					vd->vdev_stat.vs_aux =
+					    VDEV_AUX_OPEN_FAILED;
+
+				/*
+				 * Treat these errors as if they had been
+				 * retried so that all the appropriate stats
+				 * and FMA events are generated.
+				 */
+				if (!handler->zi_record.zi_failfast &&
+				    zio != NULL)
+					zio->io_flags |= ZIO_FLAG_IO_RETRY;
+
+				ret = error;
+				break;
+			}
+			if (handler->zi_record.zi_error == ENXIO) {
+				ret = EIO;
+				break;
+			}
+		}
+	}
+
+	rw_exit(&inject_lock);
+
+	return (ret);
+}
+
+/*
+ * Simulate hardware that ignores cache flushes.  For requested number
+ * of seconds nix the actual writing to disk.
+ */
+void
+zio_handle_ignored_writes(zio_t *zio)
+{
+	inject_handler_t *handler;
+
+	rw_enter(&inject_lock, RW_READER);
+
+	for (handler = list_head(&inject_handlers); handler != NULL;
+	    handler = list_next(&inject_handlers, handler)) {
+
+		/* Ignore errors not destined for this pool */
+		if (zio->io_spa != handler->zi_spa)
+			continue;
+
+		if (handler->zi_record.zi_duration == 0)
+			continue;
+
+		/*
+		 * Positive duration implies # of seconds, negative
+		 * a number of txgs
+		 */
+		if (handler->zi_record.zi_timer == 0) {
+			if (handler->zi_record.zi_duration > 0)
+				handler->zi_record.zi_timer = ddi_get_lbolt64();
+			else
+				handler->zi_record.zi_timer = zio->io_txg;
+		}
+
+		/* Have a "problem" writing 60% of the time */
+		if (spa_get_random(100) < 60)
+			zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES;
+		break;
+	}
+
+	rw_exit(&inject_lock);
+}
+
+void
+spa_handle_ignored_writes(spa_t *spa)
+{
+	inject_handler_t *handler;
+
+	if (zio_injection_enabled == 0)
+		return;
+
+	rw_enter(&inject_lock, RW_READER);
+
+	for (handler = list_head(&inject_handlers); handler != NULL;
+	    handler = list_next(&inject_handlers, handler)) {
+
+		/* Ignore errors not destined for this pool */
+		if (spa != handler->zi_spa)
+			continue;
+
+		if (handler->zi_record.zi_duration == 0)
+			continue;
+
+		if (handler->zi_record.zi_duration > 0) {
+			VERIFY(handler->zi_record.zi_timer == 0 ||
+			    handler->zi_record.zi_timer +
+			    handler->zi_record.zi_duration * hz >
+			    ddi_get_lbolt64());
+		} else {
+			/* duration is negative so the subtraction here adds */
+			VERIFY(handler->zi_record.zi_timer == 0 ||
+			    handler->zi_record.zi_timer -
+			    handler->zi_record.zi_duration >=
+			    spa_syncing_txg(spa));
+		}
+	}
+
+	rw_exit(&inject_lock);
+}
+
+/*
+ * Create a new handler for the given record.  We add it to the list, adding
+ * a reference to the spa_t in the process.  We increment zio_injection_enabled,
+ * which is the switch to trigger all fault injection.
+ */
+int
+zio_inject_fault(char *name, int flags, int *id, zinject_record_t *record)
+{
+	inject_handler_t *handler;
+	int error;
+	spa_t *spa;
+
+	/*
+	 * If this is pool-wide metadata, make sure we unload the corresponding
+	 * spa_t, so that the next attempt to load it will trigger the fault.
+	 * We call spa_reset() to unload the pool appropriately.
+	 */
+	if (flags & ZINJECT_UNLOAD_SPA)
+		if ((error = spa_reset(name)) != 0)
+			return (error);
+
+	if (!(flags & ZINJECT_NULL)) {
+		/*
+		 * spa_inject_ref() will add an injection reference, which will
+		 * prevent the pool from being removed from the namespace while
+		 * still allowing it to be unloaded.
+		 */
+		if ((spa = spa_inject_addref(name)) == NULL)
+			return (ENOENT);
+
+		handler = kmem_alloc(sizeof (inject_handler_t), KM_SLEEP);
+
+		rw_enter(&inject_lock, RW_WRITER);
+
+		*id = handler->zi_id = inject_next_id++;
+		handler->zi_spa = spa;
+		handler->zi_record = *record;
+		list_insert_tail(&inject_handlers, handler);
+		atomic_add_32(&zio_injection_enabled, 1);
+
+		rw_exit(&inject_lock);
+	}
+
+	/*
+	 * Flush the ARC, so that any attempts to read this data will end up
+	 * going to the ZIO layer.  Note that this is a little overkill, but
+	 * we don't have the necessary ARC interfaces to do anything else, and
+	 * fault injection isn't a performance critical path.
+	 */
+	if (flags & ZINJECT_FLUSH_ARC)
+		arc_flush(NULL);
+
+	return (0);
+}
+
+/*
+ * Returns the next record with an ID greater than that supplied to the
+ * function.  Used to iterate over all handlers in the system.
+ */
+int
+zio_inject_list_next(int *id, char *name, size_t buflen,
+    zinject_record_t *record)
+{
+	inject_handler_t *handler;
+	int ret;
+
+	mutex_enter(&spa_namespace_lock);
+	rw_enter(&inject_lock, RW_READER);
+
+	for (handler = list_head(&inject_handlers); handler != NULL;
+	    handler = list_next(&inject_handlers, handler))
+		if (handler->zi_id > *id)
+			break;
+
+	if (handler) {
+		*record = handler->zi_record;
+		*id = handler->zi_id;
+		(void) strncpy(name, spa_name(handler->zi_spa), buflen);
+		ret = 0;
+	} else {
+		ret = ENOENT;
+	}
+
+	rw_exit(&inject_lock);
+	mutex_exit(&spa_namespace_lock);
+
+	return (ret);
+}
+
+/*
+ * Clear the fault handler with the given identifier, or return ENOENT if none
+ * exists.
+ */
+int
+zio_clear_fault(int id)
+{
+	inject_handler_t *handler;
+
+	rw_enter(&inject_lock, RW_WRITER);
+
+	for (handler = list_head(&inject_handlers); handler != NULL;
+	    handler = list_next(&inject_handlers, handler))
+		if (handler->zi_id == id)
+			break;
+
+	if (handler == NULL) {
+		rw_exit(&inject_lock);
+		return (ENOENT);
+	}
+
+	list_remove(&inject_handlers, handler);
+	rw_exit(&inject_lock);
+
+	spa_inject_delref(handler->zi_spa);
+	kmem_free(handler, sizeof (inject_handler_t));
+	atomic_add_32(&zio_injection_enabled, -1);
+
+	return (0);
+}
+
+void
+zio_inject_init(void)
+{
+	rw_init(&inject_lock, NULL, RW_DEFAULT, NULL);
+	list_create(&inject_handlers, sizeof (inject_handler_t),
+	    offsetof(inject_handler_t, zi_link));
+}
+
+void
+zio_inject_fini(void)
+{
+	list_destroy(&inject_handlers);
+	rw_destroy(&inject_lock);
+}
diff --git a/uts/common/fs/zfs/zle.c b/uts/common/fs/zfs/zle.c
new file mode 100644
index 000000000000..13c5673fbe26
--- /dev/null
+++ b/uts/common/fs/zfs/zle.c
@@ -0,0 +1,86 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * Zero-length encoding.  This is a fast and simple algorithm to eliminate
+ * runs of zeroes.  Each chunk of compressed data begins with a length byte, b.
+ * If b < n (where n is the compression parameter) then the next b + 1 bytes
+ * are literal values.  If b >= n then the next (256 - b + 1) bytes are zero.
+ */
+#include <sys/types.h>
+#include <sys/sysmacros.h>
+
+size_t
+zle_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
+{
+	uchar_t *src = s_start;
+	uchar_t *dst = d_start;
+	uchar_t *s_end = src + s_len;
+	uchar_t *d_end = dst + d_len;
+
+	while (src < s_end && dst < d_end - 1) {
+		uchar_t *first = src;
+		uchar_t *len = dst++;
+		if (src[0] == 0) {
+			uchar_t *last = src + (256 - n);
+			while (src < MIN(last, s_end) && src[0] == 0)
+				src++;
+			*len = src - first - 1 + n;
+		} else {
+			uchar_t *last = src + n;
+			if (d_end - dst < n)
+				break;
+			while (src < MIN(last, s_end) - 1 && (src[0] | src[1]))
+				*dst++ = *src++;
+			if (src[0])
+				*dst++ = *src++;
+			*len = src - first - 1;
+		}
+	}
+	return (src == s_end ? dst - (uchar_t *)d_start : s_len);
+}
+
+int
+zle_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
+{
+	uchar_t *src = s_start;
+	uchar_t *dst = d_start;
+	uchar_t *s_end = src + s_len;
+	uchar_t *d_end = dst + d_len;
+
+	while (src < s_end && dst < d_end) {
+		int len = 1 + *src++;
+		if (len <= n) {
+			while (len-- != 0)
+				*dst++ = *src++;
+		} else {
+			len -= n;
+			while (len-- != 0)
+				*dst++ = 0;
+		}
+	}
+	return (dst == d_end ? 0 : -1);
+}
diff --git a/uts/common/fs/zfs/zrlock.c b/uts/common/fs/zfs/zrlock.c
new file mode 100644
index 000000000000..ec94b08555be
--- /dev/null
+++ b/uts/common/fs/zfs/zrlock.c
@@ -0,0 +1,194 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * A Zero Reference Lock (ZRL) is a reference count that can lock out new
+ * references only when the count is zero and only without waiting if the count
+ * is not already zero. It is similar to a read-write lock in that it allows
+ * multiple readers and only a single writer, but it does not allow a writer to
+ * block while waiting for readers to exit, and therefore the question of
+ * reader/writer priority is moot (no WRWANT bit). Since the equivalent of
+ * rw_enter(&lock, RW_WRITER) is disallowed and only tryenter() is allowed, it
+ * is perfectly safe for the same reader to acquire the same lock multiple
+ * times. The fact that a ZRL is reentrant for readers (through multiple calls
+ * to zrl_add()) makes it convenient for determining whether something is
+ * actively referenced without the fuss of flagging lock ownership across
+ * function calls.
+ */
+#include <sys/zrlock.h>
+
+/*
+ * A ZRL can be locked only while there are zero references, so ZRL_LOCKED is
+ * treated as zero references.
+ */
+#define	ZRL_LOCKED	((uint32_t)-1)
+#define	ZRL_DESTROYED	-2
+
+void
+zrl_init(zrlock_t *zrl)
+{
+	mutex_init(&zrl->zr_mtx, NULL, MUTEX_DEFAULT, NULL);
+	zrl->zr_refcount = 0;
+	cv_init(&zrl->zr_cv, NULL, CV_DEFAULT, NULL);
+#ifdef	ZFS_DEBUG
+	zrl->zr_owner = NULL;
+	zrl->zr_caller = NULL;
+#endif
+}
+
+void
+zrl_destroy(zrlock_t *zrl)
+{
+	ASSERT(zrl->zr_refcount == 0);
+
+	mutex_destroy(&zrl->zr_mtx);
+	zrl->zr_refcount = ZRL_DESTROYED;
+	cv_destroy(&zrl->zr_cv);
+}
+
+void
+#ifdef	ZFS_DEBUG
+zrl_add_debug(zrlock_t *zrl, const char *zc)
+#else
+zrl_add(zrlock_t *zrl)
+#endif
+{
+	uint32_t n = (uint32_t)zrl->zr_refcount;
+
+	while (n != ZRL_LOCKED) {
+		uint32_t cas = atomic_cas_32(
+		    (uint32_t *)&zrl->zr_refcount, n, n + 1);
+		if (cas == n) {
+			ASSERT((int32_t)n >= 0);
+#ifdef	ZFS_DEBUG
+			if (zrl->zr_owner == curthread) {
+				DTRACE_PROBE2(zrlock__reentry,
+				    zrlock_t *, zrl, uint32_t, n);
+			}
+			zrl->zr_owner = curthread;
+			zrl->zr_caller = zc;
+#endif
+			return;
+		}
+		n = cas;
+	}
+
+	mutex_enter(&zrl->zr_mtx);
+	while (zrl->zr_refcount == ZRL_LOCKED) {
+		cv_wait(&zrl->zr_cv, &zrl->zr_mtx);
+	}
+	ASSERT(zrl->zr_refcount >= 0);
+	zrl->zr_refcount++;
+#ifdef	ZFS_DEBUG
+	zrl->zr_owner = curthread;
+	zrl->zr_caller = zc;
+#endif
+	mutex_exit(&zrl->zr_mtx);
+}
+
+void
+zrl_remove(zrlock_t *zrl)
+{
+	uint32_t n;
+
+	n = atomic_dec_32_nv((uint32_t *)&zrl->zr_refcount);
+	ASSERT((int32_t)n >= 0);
+#ifdef	ZFS_DEBUG
+	if (zrl->zr_owner == curthread) {
+		zrl->zr_owner = NULL;
+		zrl->zr_caller = NULL;
+	}
+#endif
+}
+
+int
+zrl_tryenter(zrlock_t *zrl)
+{
+	uint32_t n = (uint32_t)zrl->zr_refcount;
+
+	if (n == 0) {
+		uint32_t cas = atomic_cas_32(
+		    (uint32_t *)&zrl->zr_refcount, 0, ZRL_LOCKED);
+		if (cas == 0) {
+#ifdef	ZFS_DEBUG
+			ASSERT(zrl->zr_owner == NULL);
+			zrl->zr_owner = curthread;
+#endif
+			return (1);
+		}
+	}
+
+	ASSERT((int32_t)n > ZRL_DESTROYED);
+
+	return (0);
+}
+
+void
+zrl_exit(zrlock_t *zrl)
+{
+	ASSERT(zrl->zr_refcount == ZRL_LOCKED);
+
+	mutex_enter(&zrl->zr_mtx);
+#ifdef	ZFS_DEBUG
+	ASSERT(zrl->zr_owner == curthread);
+	zrl->zr_owner = NULL;
+	membar_producer();	/* make sure the owner store happens first */
+#endif
+	zrl->zr_refcount = 0;
+	cv_broadcast(&zrl->zr_cv);
+	mutex_exit(&zrl->zr_mtx);
+}
+
+int
+zrl_refcount(zrlock_t *zrl)
+{
+	ASSERT(zrl->zr_refcount > ZRL_DESTROYED);
+
+	int n = (int)zrl->zr_refcount;
+	return (n <= 0 ? 0 : n);
+}
+
+int
+zrl_is_zero(zrlock_t *zrl)
+{
+	ASSERT(zrl->zr_refcount > ZRL_DESTROYED);
+
+	return (zrl->zr_refcount <= 0);
+}
+
+int
+zrl_is_locked(zrlock_t *zrl)
+{
+	ASSERT(zrl->zr_refcount > ZRL_DESTROYED);
+
+	return (zrl->zr_refcount == ZRL_LOCKED);
+}
+
+#ifdef	ZFS_DEBUG
+kthread_t *
+zrl_owner(zrlock_t *zrl)
+{
+	return (zrl->zr_owner);
+}
+#endif
diff --git a/uts/common/fs/zfs/zvol.c b/uts/common/fs/zfs/zvol.c
new file mode 100644
index 000000000000..47b6c5a87a52
--- /dev/null
+++ b/uts/common/fs/zfs/zvol.c
@@ -0,0 +1,1894 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2010 Robert Milkowski */
+
+/*
+ * ZFS volume emulation driver.
+ *
+ * Makes a DMU object look like a volume of arbitrary size, up to 2^64 bytes.
+ * Volumes are accessed through the symbolic links named:
+ *
+ * /dev/zvol/dsk/<pool_name>/<dataset_name>
+ * /dev/zvol/rdsk/<pool_name>/<dataset_name>
+ *
+ * These links are created by the /dev filesystem (sdev_zvolops.c).
+ * Volumes are persistent through reboot.  No user command needs to be
+ * run before opening and using a device.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/uio.h>
+#include <sys/buf.h>
+#include <sys/modctl.h>
+#include <sys/open.h>
+#include <sys/kmem.h>
+#include <sys/conf.h>
+#include <sys/cmn_err.h>
+#include <sys/stat.h>
+#include <sys/zap.h>
+#include <sys/spa.h>
+#include <sys/zio.h>
+#include <sys/dmu_traverse.h>
+#include <sys/dnode.h>
+#include <sys/dsl_dataset.h>
+#include <sys/dsl_prop.h>
+#include <sys/dkio.h>
+#include <sys/efi_partition.h>
+#include <sys/byteorder.h>
+#include <sys/pathname.h>
+#include <sys/ddi.h>
+#include <sys/sunddi.h>
+#include <sys/crc32.h>
+#include <sys/dirent.h>
+#include <sys/policy.h>
+#include <sys/fs/zfs.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/mkdev.h>
+#include <sys/zil.h>
+#include <sys/refcount.h>
+#include <sys/zfs_znode.h>
+#include <sys/zfs_rlock.h>
+#include <sys/vdev_disk.h>
+#include <sys/vdev_impl.h>
+#include <sys/zvol.h>
+#include <sys/dumphdr.h>
+#include <sys/zil_impl.h>
+
+#include "zfs_namecheck.h"
+
+void *zfsdev_state;
+static char *zvol_tag = "zvol_tag";
+
+#define	ZVOL_DUMPSIZE		"dumpsize"
+
+/*
+ * This lock protects the zfsdev_state structure from being modified
+ * while it's being used, e.g. an open that comes in before a create
+ * finishes.  It also protects temporary opens of the dataset so that,
+ * e.g., an open doesn't get a spurious EBUSY.
+ */
+kmutex_t zfsdev_state_lock;
+static uint32_t zvol_minors;
+
+typedef struct zvol_extent {
+	list_node_t	ze_node;
+	dva_t		ze_dva;		/* dva associated with this extent */
+	uint64_t	ze_nblks;	/* number of blocks in extent */
+} zvol_extent_t;
+
+/*
+ * The in-core state of each volume.
+ */
+typedef struct zvol_state {
+	char		zv_name[MAXPATHLEN]; /* pool/dd name */
+	uint64_t	zv_volsize;	/* amount of space we advertise */
+	uint64_t	zv_volblocksize; /* volume block size */
+	minor_t		zv_minor;	/* minor number */
+	uint8_t		zv_min_bs;	/* minimum addressable block shift */
+	uint8_t		zv_flags;	/* readonly, dumpified, etc. */
+	objset_t	*zv_objset;	/* objset handle */
+	uint32_t	zv_open_count[OTYPCNT];	/* open counts */
+	uint32_t	zv_total_opens;	/* total open count */
+	zilog_t		*zv_zilog;	/* ZIL handle */
+	list_t		zv_extents;	/* List of extents for dump */
+	znode_t		zv_znode;	/* for range locking */
+	dmu_buf_t	*zv_dbuf;	/* bonus handle */
+} zvol_state_t;
+
+/*
+ * zvol specific flags
+ */
+#define	ZVOL_RDONLY	0x1
+#define	ZVOL_DUMPIFIED	0x2
+#define	ZVOL_EXCL	0x4
+#define	ZVOL_WCE	0x8
+
+/*
+ * zvol maximum transfer in one DMU tx.
+ */
+int zvol_maxphys = DMU_MAX_ACCESS/2;
+
+extern int zfs_set_prop_nvlist(const char *, zprop_source_t,
+    nvlist_t *, nvlist_t **);
+static int zvol_remove_zv(zvol_state_t *);
+static int zvol_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio);
+static int zvol_dumpify(zvol_state_t *zv);
+static int zvol_dump_fini(zvol_state_t *zv);
+static int zvol_dump_init(zvol_state_t *zv, boolean_t resize);
+
+static void
+zvol_size_changed(uint64_t volsize, major_t maj, minor_t min)
+{
+	dev_t dev = makedevice(maj, min);
+
+	VERIFY(ddi_prop_update_int64(dev, zfs_dip,
+	    "Size", volsize) == DDI_SUCCESS);
+	VERIFY(ddi_prop_update_int64(dev, zfs_dip,
+	    "Nblocks", lbtodb(volsize)) == DDI_SUCCESS);
+
+	/* Notify specfs to invalidate the cached size */
+	spec_size_invalidate(dev, VBLK);
+	spec_size_invalidate(dev, VCHR);
+}
+
+int
+zvol_check_volsize(uint64_t volsize, uint64_t blocksize)
+{
+	if (volsize == 0)
+		return (EINVAL);
+
+	if (volsize % blocksize != 0)
+		return (EINVAL);
+
+#ifdef _ILP32
+	if (volsize - 1 > SPEC_MAXOFFSET_T)
+		return (EOVERFLOW);
+#endif
+	return (0);
+}
+
+int
+zvol_check_volblocksize(uint64_t volblocksize)
+{
+	if (volblocksize < SPA_MINBLOCKSIZE ||
+	    volblocksize > SPA_MAXBLOCKSIZE ||
+	    !ISP2(volblocksize))
+		return (EDOM);
+
+	return (0);
+}
+
+int
+zvol_get_stats(objset_t *os, nvlist_t *nv)
+{
+	int error;
+	dmu_object_info_t doi;
+	uint64_t val;
+
+	error = zap_lookup(os, ZVOL_ZAP_OBJ, "size", 8, 1, &val);
+	if (error)
+		return (error);
+
+	dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_VOLSIZE, val);
+
+	error = dmu_object_info(os, ZVOL_OBJ, &doi);
+
+	if (error == 0) {
+		dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_VOLBLOCKSIZE,
+		    doi.doi_data_block_size);
+	}
+
+	return (error);
+}
+
+static zvol_state_t *
+zvol_minor_lookup(const char *name)
+{
+	minor_t minor;
+	zvol_state_t *zv;
+
+	ASSERT(MUTEX_HELD(&zfsdev_state_lock));
+
+	for (minor = 1; minor <= ZFSDEV_MAX_MINOR; minor++) {
+		zv = zfsdev_get_soft_state(minor, ZSST_ZVOL);
+		if (zv == NULL)
+			continue;
+		if (strcmp(zv->zv_name, name) == 0)
+			return (zv);
+	}
+
+	return (NULL);
+}
+
+/* extent mapping arg */
+struct maparg {
+	zvol_state_t	*ma_zv;
+	uint64_t	ma_blks;
+};
+
+/*ARGSUSED*/
+static int
+zvol_map_block(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, arc_buf_t *pbuf,
+    const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
+{
+	struct maparg *ma = arg;
+	zvol_extent_t *ze;
+	int bs = ma->ma_zv->zv_volblocksize;
+
+	if (bp == NULL || zb->zb_object != ZVOL_OBJ || zb->zb_level != 0)
+		return (0);
+
+	VERIFY3U(ma->ma_blks, ==, zb->zb_blkid);
+	ma->ma_blks++;
+
+	/* Abort immediately if we have encountered gang blocks */
+	if (BP_IS_GANG(bp))
+		return (EFRAGS);
+
+	/*
+	 * See if the block is at the end of the previous extent.
+	 */
+	ze = list_tail(&ma->ma_zv->zv_extents);
+	if (ze &&
+	    DVA_GET_VDEV(BP_IDENTITY(bp)) == DVA_GET_VDEV(&ze->ze_dva) &&
+	    DVA_GET_OFFSET(BP_IDENTITY(bp)) ==
+	    DVA_GET_OFFSET(&ze->ze_dva) + ze->ze_nblks * bs) {
+		ze->ze_nblks++;
+		return (0);
+	}
+
+	dprintf_bp(bp, "%s", "next blkptr:");
+
+	/* start a new extent */
+	ze = kmem_zalloc(sizeof (zvol_extent_t), KM_SLEEP);
+	ze->ze_dva = bp->blk_dva[0];	/* structure assignment */
+	ze->ze_nblks = 1;
+	list_insert_tail(&ma->ma_zv->zv_extents, ze);
+	return (0);
+}
+
+static void
+zvol_free_extents(zvol_state_t *zv)
+{
+	zvol_extent_t *ze;
+
+	while (ze = list_head(&zv->zv_extents)) {
+		list_remove(&zv->zv_extents, ze);
+		kmem_free(ze, sizeof (zvol_extent_t));
+	}
+}
+
+static int
+zvol_get_lbas(zvol_state_t *zv)
+{
+	objset_t *os = zv->zv_objset;
+	struct maparg	ma;
+	int		err;
+
+	ma.ma_zv = zv;
+	ma.ma_blks = 0;
+	zvol_free_extents(zv);
+
+	/* commit any in-flight changes before traversing the dataset */
+	txg_wait_synced(dmu_objset_pool(os), 0);
+	err = traverse_dataset(dmu_objset_ds(os), 0,
+	    TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA, zvol_map_block, &ma);
+	if (err || ma.ma_blks != (zv->zv_volsize / zv->zv_volblocksize)) {
+		zvol_free_extents(zv);
+		return (err ? err : EIO);
+	}
+
+	return (0);
+}
+
+/* ARGSUSED */
+void
+zvol_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
+{
+	zfs_creat_t *zct = arg;
+	nvlist_t *nvprops = zct->zct_props;
+	int error;
+	uint64_t volblocksize, volsize;
+
+	VERIFY(nvlist_lookup_uint64(nvprops,
+	    zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) == 0);
+	if (nvlist_lookup_uint64(nvprops,
+	    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), &volblocksize) != 0)
+		volblocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
+
+	/*
+	 * These properties must be removed from the list so the generic
+	 * property setting step won't apply to them.
+	 */
+	VERIFY(nvlist_remove_all(nvprops,
+	    zfs_prop_to_name(ZFS_PROP_VOLSIZE)) == 0);
+	(void) nvlist_remove_all(nvprops,
+	    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE));
+
+	error = dmu_object_claim(os, ZVOL_OBJ, DMU_OT_ZVOL, volblocksize,
+	    DMU_OT_NONE, 0, tx);
+	ASSERT(error == 0);
+
+	error = zap_create_claim(os, ZVOL_ZAP_OBJ, DMU_OT_ZVOL_PROP,
+	    DMU_OT_NONE, 0, tx);
+	ASSERT(error == 0);
+
+	error = zap_update(os, ZVOL_ZAP_OBJ, "size", 8, 1, &volsize, tx);
+	ASSERT(error == 0);
+}
+
+/*
+ * Replay a TX_WRITE ZIL transaction that didn't get committed
+ * after a system failure
+ */
+static int
+zvol_replay_write(zvol_state_t *zv, lr_write_t *lr, boolean_t byteswap)
+{
+	objset_t *os = zv->zv_objset;
+	char *data = (char *)(lr + 1);	/* data follows lr_write_t */
+	uint64_t offset, length;
+	dmu_tx_t *tx;
+	int error;
+
+	if (byteswap)
+		byteswap_uint64_array(lr, sizeof (*lr));
+
+	offset = lr->lr_offset;
+	length = lr->lr_length;
+
+	/* If it's a dmu_sync() block, write the whole block */
+	if (lr->lr_common.lrc_reclen == sizeof (lr_write_t)) {
+		uint64_t blocksize = BP_GET_LSIZE(&lr->lr_blkptr);
+		if (length < blocksize) {
+			offset -= offset % blocksize;
+			length = blocksize;
+		}
+	}
+
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_write(tx, ZVOL_OBJ, offset, length);
+	error = dmu_tx_assign(tx, TXG_WAIT);
+	if (error) {
+		dmu_tx_abort(tx);
+	} else {
+		dmu_write(os, ZVOL_OBJ, offset, length, data, tx);
+		dmu_tx_commit(tx);
+	}
+
+	return (error);
+}
+
+/* ARGSUSED */
+static int
+zvol_replay_err(zvol_state_t *zv, lr_t *lr, boolean_t byteswap)
+{
+	return (ENOTSUP);
+}
+
+/*
+ * Callback vectors for replaying records.
+ * Only TX_WRITE is needed for zvol.
+ */
+zil_replay_func_t *zvol_replay_vector[TX_MAX_TYPE] = {
+	zvol_replay_err,	/* 0 no such transaction type */
+	zvol_replay_err,	/* TX_CREATE */
+	zvol_replay_err,	/* TX_MKDIR */
+	zvol_replay_err,	/* TX_MKXATTR */
+	zvol_replay_err,	/* TX_SYMLINK */
+	zvol_replay_err,	/* TX_REMOVE */
+	zvol_replay_err,	/* TX_RMDIR */
+	zvol_replay_err,	/* TX_LINK */
+	zvol_replay_err,	/* TX_RENAME */
+	zvol_replay_write,	/* TX_WRITE */
+	zvol_replay_err,	/* TX_TRUNCATE */
+	zvol_replay_err,	/* TX_SETATTR */
+	zvol_replay_err,	/* TX_ACL */
+	zvol_replay_err,	/* TX_CREATE_ACL */
+	zvol_replay_err,	/* TX_CREATE_ATTR */
+	zvol_replay_err,	/* TX_CREATE_ACL_ATTR */
+	zvol_replay_err,	/* TX_MKDIR_ACL */
+	zvol_replay_err,	/* TX_MKDIR_ATTR */
+	zvol_replay_err,	/* TX_MKDIR_ACL_ATTR */
+	zvol_replay_err,	/* TX_WRITE2 */
+};
+
+int
+zvol_name2minor(const char *name, minor_t *minor)
+{
+	zvol_state_t *zv;
+
+	mutex_enter(&zfsdev_state_lock);
+	zv = zvol_minor_lookup(name);
+	if (minor && zv)
+		*minor = zv->zv_minor;
+	mutex_exit(&zfsdev_state_lock);
+	return (zv ? 0 : -1);
+}
+
+/*
+ * Create a minor node (plus a whole lot more) for the specified volume.
+ */
+int
+zvol_create_minor(const char *name)
+{
+	zfs_soft_state_t *zs;
+	zvol_state_t *zv;
+	objset_t *os;
+	dmu_object_info_t doi;
+	minor_t minor = 0;
+	char chrbuf[30], blkbuf[30];
+	int error;
+
+	mutex_enter(&zfsdev_state_lock);
+
+	if (zvol_minor_lookup(name) != NULL) {
+		mutex_exit(&zfsdev_state_lock);
+		return (EEXIST);
+	}
+
+	/* lie and say we're read-only */
+	error = dmu_objset_own(name, DMU_OST_ZVOL, B_TRUE, FTAG, &os);
+
+	if (error) {
+		mutex_exit(&zfsdev_state_lock);
+		return (error);
+	}
+
+	if ((minor = zfsdev_minor_alloc()) == 0) {
+		dmu_objset_disown(os, FTAG);
+		mutex_exit(&zfsdev_state_lock);
+		return (ENXIO);
+	}
+
+	if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS) {
+		dmu_objset_disown(os, FTAG);
+		mutex_exit(&zfsdev_state_lock);
+		return (EAGAIN);
+	}
+	(void) ddi_prop_update_string(minor, zfs_dip, ZVOL_PROP_NAME,
+	    (char *)name);
+
+	(void) snprintf(chrbuf, sizeof (chrbuf), "%u,raw", minor);
+
+	if (ddi_create_minor_node(zfs_dip, chrbuf, S_IFCHR,
+	    minor, DDI_PSEUDO, 0) == DDI_FAILURE) {
+		ddi_soft_state_free(zfsdev_state, minor);
+		dmu_objset_disown(os, FTAG);
+		mutex_exit(&zfsdev_state_lock);
+		return (EAGAIN);
+	}
+
+	(void) snprintf(blkbuf, sizeof (blkbuf), "%u", minor);
+
+	if (ddi_create_minor_node(zfs_dip, blkbuf, S_IFBLK,
+	    minor, DDI_PSEUDO, 0) == DDI_FAILURE) {
+		ddi_remove_minor_node(zfs_dip, chrbuf);
+		ddi_soft_state_free(zfsdev_state, minor);
+		dmu_objset_disown(os, FTAG);
+		mutex_exit(&zfsdev_state_lock);
+		return (EAGAIN);
+	}
+
+	zs = ddi_get_soft_state(zfsdev_state, minor);
+	zs->zss_type = ZSST_ZVOL;
+	zv = zs->zss_data = kmem_zalloc(sizeof (zvol_state_t), KM_SLEEP);
+	(void) strlcpy(zv->zv_name, name, MAXPATHLEN);
+	zv->zv_min_bs = DEV_BSHIFT;
+	zv->zv_minor = minor;
+	zv->zv_objset = os;
+	if (dmu_objset_is_snapshot(os) || !spa_writeable(dmu_objset_spa(os)))
+		zv->zv_flags |= ZVOL_RDONLY;
+	mutex_init(&zv->zv_znode.z_range_lock, NULL, MUTEX_DEFAULT, NULL);
+	avl_create(&zv->zv_znode.z_range_avl, zfs_range_compare,
+	    sizeof (rl_t), offsetof(rl_t, r_node));
+	list_create(&zv->zv_extents, sizeof (zvol_extent_t),
+	    offsetof(zvol_extent_t, ze_node));
+	/* get and cache the blocksize */
+	error = dmu_object_info(os, ZVOL_OBJ, &doi);
+	ASSERT(error == 0);
+	zv->zv_volblocksize = doi.doi_data_block_size;
+
+	if (spa_writeable(dmu_objset_spa(os))) {
+		if (zil_replay_disable)
+			zil_destroy(dmu_objset_zil(os), B_FALSE);
+		else
+			zil_replay(os, zv, zvol_replay_vector);
+	}
+	dmu_objset_disown(os, FTAG);
+	zv->zv_objset = NULL;
+
+	zvol_minors++;
+
+	mutex_exit(&zfsdev_state_lock);
+
+	return (0);
+}
+
+/*
+ * Remove minor node for the specified volume.
+ */
+static int
+zvol_remove_zv(zvol_state_t *zv)
+{
+	char nmbuf[20];
+	minor_t minor = zv->zv_minor;
+
+	ASSERT(MUTEX_HELD(&zfsdev_state_lock));
+	if (zv->zv_total_opens != 0)
+		return (EBUSY);
+
+	(void) snprintf(nmbuf, sizeof (nmbuf), "%u,raw", minor);
+	ddi_remove_minor_node(zfs_dip, nmbuf);
+
+	(void) snprintf(nmbuf, sizeof (nmbuf), "%u", minor);
+	ddi_remove_minor_node(zfs_dip, nmbuf);
+
+	avl_destroy(&zv->zv_znode.z_range_avl);
+	mutex_destroy(&zv->zv_znode.z_range_lock);
+
+	kmem_free(zv, sizeof (zvol_state_t));
+
+	ddi_soft_state_free(zfsdev_state, minor);
+
+	zvol_minors--;
+	return (0);
+}
+
+int
+zvol_remove_minor(const char *name)
+{
+	zvol_state_t *zv;
+	int rc;
+
+	mutex_enter(&zfsdev_state_lock);
+	if ((zv = zvol_minor_lookup(name)) == NULL) {
+		mutex_exit(&zfsdev_state_lock);
+		return (ENXIO);
+	}
+	rc = zvol_remove_zv(zv);
+	mutex_exit(&zfsdev_state_lock);
+	return (rc);
+}
+
+int
+zvol_first_open(zvol_state_t *zv)
+{
+	objset_t *os;
+	uint64_t volsize;
+	int error;
+	uint64_t readonly;
+
+	/* lie and say we're read-only */
+	error = dmu_objset_own(zv->zv_name, DMU_OST_ZVOL, B_TRUE,
+	    zvol_tag, &os);
+	if (error)
+		return (error);
+
+	error = zap_lookup(os, ZVOL_ZAP_OBJ, "size", 8, 1, &volsize);
+	if (error) {
+		ASSERT(error == 0);
+		dmu_objset_disown(os, zvol_tag);
+		return (error);
+	}
+	zv->zv_objset = os;
+	error = dmu_bonus_hold(os, ZVOL_OBJ, zvol_tag, &zv->zv_dbuf);
+	if (error) {
+		dmu_objset_disown(os, zvol_tag);
+		return (error);
+	}
+	zv->zv_volsize = volsize;
+	zv->zv_zilog = zil_open(os, zvol_get_data);
+	zvol_size_changed(zv->zv_volsize, ddi_driver_major(zfs_dip),
+	    zv->zv_minor);
+
+	VERIFY(dsl_prop_get_integer(zv->zv_name, "readonly", &readonly,
+	    NULL) == 0);
+	if (readonly || dmu_objset_is_snapshot(os) ||
+	    !spa_writeable(dmu_objset_spa(os)))
+		zv->zv_flags |= ZVOL_RDONLY;
+	else
+		zv->zv_flags &= ~ZVOL_RDONLY;
+	return (error);
+}
+
+void
+zvol_last_close(zvol_state_t *zv)
+{
+	zil_close(zv->zv_zilog);
+	zv->zv_zilog = NULL;
+	dmu_buf_rele(zv->zv_dbuf, zvol_tag);
+	zv->zv_dbuf = NULL;
+	dmu_objset_disown(zv->zv_objset, zvol_tag);
+	zv->zv_objset = NULL;
+}
+
+int
+zvol_prealloc(zvol_state_t *zv)
+{
+	objset_t *os = zv->zv_objset;
+	dmu_tx_t *tx;
+	uint64_t refd, avail, usedobjs, availobjs;
+	uint64_t resid = zv->zv_volsize;
+	uint64_t off = 0;
+
+	/* Check the space usage before attempting to allocate the space */
+	dmu_objset_space(os, &refd, &avail, &usedobjs, &availobjs);
+	if (avail < zv->zv_volsize)
+		return (ENOSPC);
+
+	/* Free old extents if they exist */
+	zvol_free_extents(zv);
+
+	while (resid != 0) {
+		int error;
+		uint64_t bytes = MIN(resid, SPA_MAXBLOCKSIZE);
+
+		tx = dmu_tx_create(os);
+		dmu_tx_hold_write(tx, ZVOL_OBJ, off, bytes);
+		error = dmu_tx_assign(tx, TXG_WAIT);
+		if (error) {
+			dmu_tx_abort(tx);
+			(void) dmu_free_long_range(os, ZVOL_OBJ, 0, off);
+			return (error);
+		}
+		dmu_prealloc(os, ZVOL_OBJ, off, bytes, tx);
+		dmu_tx_commit(tx);
+		off += bytes;
+		resid -= bytes;
+	}
+	txg_wait_synced(dmu_objset_pool(os), 0);
+
+	return (0);
+}
+
+int
+zvol_update_volsize(objset_t *os, uint64_t volsize)
+{
+	dmu_tx_t *tx;
+	int error;
+
+	ASSERT(MUTEX_HELD(&zfsdev_state_lock));
+
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_zap(tx, ZVOL_ZAP_OBJ, TRUE, NULL);
+	error = dmu_tx_assign(tx, TXG_WAIT);
+	if (error) {
+		dmu_tx_abort(tx);
+		return (error);
+	}
+
+	error = zap_update(os, ZVOL_ZAP_OBJ, "size", 8, 1,
+	    &volsize, tx);
+	dmu_tx_commit(tx);
+
+	if (error == 0)
+		error = dmu_free_long_range(os,
+		    ZVOL_OBJ, volsize, DMU_OBJECT_END);
+	return (error);
+}
+
+void
+zvol_remove_minors(const char *name)
+{
+	zvol_state_t *zv;
+	char *namebuf;
+	minor_t minor;
+
+	namebuf = kmem_zalloc(strlen(name) + 2, KM_SLEEP);
+	(void) strncpy(namebuf, name, strlen(name));
+	(void) strcat(namebuf, "/");
+	mutex_enter(&zfsdev_state_lock);
+	for (minor = 1; minor <= ZFSDEV_MAX_MINOR; minor++) {
+
+		zv = zfsdev_get_soft_state(minor, ZSST_ZVOL);
+		if (zv == NULL)
+			continue;
+		if (strncmp(namebuf, zv->zv_name, strlen(namebuf)) == 0)
+			(void) zvol_remove_zv(zv);
+	}
+	kmem_free(namebuf, strlen(name) + 2);
+
+	mutex_exit(&zfsdev_state_lock);
+}
+
+int
+zvol_set_volsize(const char *name, major_t maj, uint64_t volsize)
+{
+	zvol_state_t *zv = NULL;
+	objset_t *os;
+	int error;
+	dmu_object_info_t doi;
+	uint64_t old_volsize = 0ULL;
+	uint64_t readonly;
+
+	mutex_enter(&zfsdev_state_lock);
+	zv = zvol_minor_lookup(name);
+	if ((error = dmu_objset_hold(name, FTAG, &os)) != 0) {
+		mutex_exit(&zfsdev_state_lock);
+		return (error);
+	}
+
+	if ((error = dmu_object_info(os, ZVOL_OBJ, &doi)) != 0 ||
+	    (error = zvol_check_volsize(volsize,
+	    doi.doi_data_block_size)) != 0)
+		goto out;
+
+	VERIFY(dsl_prop_get_integer(name, "readonly", &readonly,
+	    NULL) == 0);
+	if (readonly) {
+		error = EROFS;
+		goto out;
+	}
+
+	error = zvol_update_volsize(os, volsize);
+	/*
+	 * Reinitialize the dump area to the new size. If we
+	 * failed to resize the dump area then restore it back to
+	 * its original size.
+	 */
+	if (zv && error == 0) {
+		if (zv->zv_flags & ZVOL_DUMPIFIED) {
+			old_volsize = zv->zv_volsize;
+			zv->zv_volsize = volsize;
+			if ((error = zvol_dumpify(zv)) != 0 ||
+			    (error = dumpvp_resize()) != 0) {
+				(void) zvol_update_volsize(os, old_volsize);
+				zv->zv_volsize = old_volsize;
+				error = zvol_dumpify(zv);
+			}
+		}
+		if (error == 0) {
+			zv->zv_volsize = volsize;
+			zvol_size_changed(volsize, maj, zv->zv_minor);
+		}
+	}
+
+	/*
+	 * Generate a LUN expansion event.
+	 */
+	if (zv && error == 0) {
+		sysevent_id_t eid;
+		nvlist_t *attr;
+		char *physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP);
+
+		(void) snprintf(physpath, MAXPATHLEN, "%s%u", ZVOL_PSEUDO_DEV,
+		    zv->zv_minor);
+
+		VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0);
+
+		(void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS,
+		    ESC_DEV_DLE, attr, &eid, DDI_SLEEP);
+
+		nvlist_free(attr);
+		kmem_free(physpath, MAXPATHLEN);
+	}
+
+out:
+	dmu_objset_rele(os, FTAG);
+
+	mutex_exit(&zfsdev_state_lock);
+
+	return (error);
+}
+
+/*ARGSUSED*/
+int
+zvol_open(dev_t *devp, int flag, int otyp, cred_t *cr)
+{
+	zvol_state_t *zv;
+	int err = 0;
+
+	mutex_enter(&zfsdev_state_lock);
+
+	zv = zfsdev_get_soft_state(getminor(*devp), ZSST_ZVOL);
+	if (zv == NULL) {
+		mutex_exit(&zfsdev_state_lock);
+		return (ENXIO);
+	}
+
+	if (zv->zv_total_opens == 0)
+		err = zvol_first_open(zv);
+	if (err) {
+		mutex_exit(&zfsdev_state_lock);
+		return (err);
+	}
+	if ((flag & FWRITE) && (zv->zv_flags & ZVOL_RDONLY)) {
+		err = EROFS;
+		goto out;
+	}
+	if (zv->zv_flags & ZVOL_EXCL) {
+		err = EBUSY;
+		goto out;
+	}
+	if (flag & FEXCL) {
+		if (zv->zv_total_opens != 0) {
+			err = EBUSY;
+			goto out;
+		}
+		zv->zv_flags |= ZVOL_EXCL;
+	}
+
+	if (zv->zv_open_count[otyp] == 0 || otyp == OTYP_LYR) {
+		zv->zv_open_count[otyp]++;
+		zv->zv_total_opens++;
+	}
+	mutex_exit(&zfsdev_state_lock);
+
+	return (err);
+out:
+	if (zv->zv_total_opens == 0)
+		zvol_last_close(zv);
+	mutex_exit(&zfsdev_state_lock);
+	return (err);
+}
+
+/*ARGSUSED*/
+int
+zvol_close(dev_t dev, int flag, int otyp, cred_t *cr)
+{
+	minor_t minor = getminor(dev);
+	zvol_state_t *zv;
+	int error = 0;
+
+	mutex_enter(&zfsdev_state_lock);
+
+	zv = zfsdev_get_soft_state(minor, ZSST_ZVOL);
+	if (zv == NULL) {
+		mutex_exit(&zfsdev_state_lock);
+		return (ENXIO);
+	}
+
+	if (zv->zv_flags & ZVOL_EXCL) {
+		ASSERT(zv->zv_total_opens == 1);
+		zv->zv_flags &= ~ZVOL_EXCL;
+	}
+
+	/*
+	 * If the open count is zero, this is a spurious close.
+	 * That indicates a bug in the kernel / DDI framework.
+	 */
+	ASSERT(zv->zv_open_count[otyp] != 0);
+	ASSERT(zv->zv_total_opens != 0);
+
+	/*
+	 * You may get multiple opens, but only one close.
+	 */
+	zv->zv_open_count[otyp]--;
+	zv->zv_total_opens--;
+
+	if (zv->zv_total_opens == 0)
+		zvol_last_close(zv);
+
+	mutex_exit(&zfsdev_state_lock);
+	return (error);
+}
+
+static void
+zvol_get_done(zgd_t *zgd, int error)
+{
+	if (zgd->zgd_db)
+		dmu_buf_rele(zgd->zgd_db, zgd);
+
+	zfs_range_unlock(zgd->zgd_rl);
+
+	if (error == 0 && zgd->zgd_bp)
+		zil_add_block(zgd->zgd_zilog, zgd->zgd_bp);
+
+	kmem_free(zgd, sizeof (zgd_t));
+}
+
+/*
+ * Get data to generate a TX_WRITE intent log record.
+ */
+static int
+zvol_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio)
+{
+	zvol_state_t *zv = arg;
+	objset_t *os = zv->zv_objset;
+	uint64_t object = ZVOL_OBJ;
+	uint64_t offset = lr->lr_offset;
+	uint64_t size = lr->lr_length;	/* length of user data */
+	blkptr_t *bp = &lr->lr_blkptr;
+	dmu_buf_t *db;
+	zgd_t *zgd;
+	int error;
+
+	ASSERT(zio != NULL);
+	ASSERT(size != 0);
+
+	zgd = kmem_zalloc(sizeof (zgd_t), KM_SLEEP);
+	zgd->zgd_zilog = zv->zv_zilog;
+	zgd->zgd_rl = zfs_range_lock(&zv->zv_znode, offset, size, RL_READER);
+
+	/*
+	 * Write records come in two flavors: immediate and indirect.
+	 * For small writes it's cheaper to store the data with the
+	 * log record (immediate); for large writes it's cheaper to
+	 * sync the data and get a pointer to it (indirect) so that
+	 * we don't have to write the data twice.
+	 */
+	if (buf != NULL) {	/* immediate write */
+		error = dmu_read(os, object, offset, size, buf,
+		    DMU_READ_NO_PREFETCH);
+	} else {
+		size = zv->zv_volblocksize;
+		offset = P2ALIGN(offset, size);
+		error = dmu_buf_hold(os, object, offset, zgd, &db,
+		    DMU_READ_NO_PREFETCH);
+		if (error == 0) {
+			zgd->zgd_db = db;
+			zgd->zgd_bp = bp;
+
+			ASSERT(db->db_offset == offset);
+			ASSERT(db->db_size == size);
+
+			error = dmu_sync(zio, lr->lr_common.lrc_txg,
+			    zvol_get_done, zgd);
+
+			if (error == 0)
+				return (0);
+		}
+	}
+
+	zvol_get_done(zgd, error);
+
+	return (error);
+}
+
+/*
+ * zvol_log_write() handles synchronous writes using TX_WRITE ZIL transactions.
+ *
+ * We store data in the log buffers if it's small enough.
+ * Otherwise we will later flush the data out via dmu_sync().
+ */
+ssize_t zvol_immediate_write_sz = 32768;
+
+static void
+zvol_log_write(zvol_state_t *zv, dmu_tx_t *tx, offset_t off, ssize_t resid,
+    boolean_t sync)
+{
+	uint32_t blocksize = zv->zv_volblocksize;
+	zilog_t *zilog = zv->zv_zilog;
+	boolean_t slogging;
+	ssize_t immediate_write_sz;
+
+	if (zil_replaying(zilog, tx))
+		return;
+
+	immediate_write_sz = (zilog->zl_logbias == ZFS_LOGBIAS_THROUGHPUT)
+	    ? 0 : zvol_immediate_write_sz;
+
+	slogging = spa_has_slogs(zilog->zl_spa) &&
+	    (zilog->zl_logbias == ZFS_LOGBIAS_LATENCY);
+
+	while (resid) {
+		itx_t *itx;
+		lr_write_t *lr;
+		ssize_t len;
+		itx_wr_state_t write_state;
+
+		/*
+		 * Unlike zfs_log_write() we can be called with
+		 * upto DMU_MAX_ACCESS/2 (5MB) writes.
+		 */
+		if (blocksize > immediate_write_sz && !slogging &&
+		    resid >= blocksize && off % blocksize == 0) {
+			write_state = WR_INDIRECT; /* uses dmu_sync */
+			len = blocksize;
+		} else if (sync) {
+			write_state = WR_COPIED;
+			len = MIN(ZIL_MAX_LOG_DATA, resid);
+		} else {
+			write_state = WR_NEED_COPY;
+			len = MIN(ZIL_MAX_LOG_DATA, resid);
+		}
+
+		itx = zil_itx_create(TX_WRITE, sizeof (*lr) +
+		    (write_state == WR_COPIED ? len : 0));
+		lr = (lr_write_t *)&itx->itx_lr;
+		if (write_state == WR_COPIED && dmu_read(zv->zv_objset,
+		    ZVOL_OBJ, off, len, lr + 1, DMU_READ_NO_PREFETCH) != 0) {
+			zil_itx_destroy(itx);
+			itx = zil_itx_create(TX_WRITE, sizeof (*lr));
+			lr = (lr_write_t *)&itx->itx_lr;
+			write_state = WR_NEED_COPY;
+		}
+
+		itx->itx_wr_state = write_state;
+		if (write_state == WR_NEED_COPY)
+			itx->itx_sod += len;
+		lr->lr_foid = ZVOL_OBJ;
+		lr->lr_offset = off;
+		lr->lr_length = len;
+		lr->lr_blkoff = 0;
+		BP_ZERO(&lr->lr_blkptr);
+
+		itx->itx_private = zv;
+		itx->itx_sync = sync;
+
+		zil_itx_assign(zilog, itx, tx);
+
+		off += len;
+		resid -= len;
+	}
+}
+
+static int
+zvol_dumpio_vdev(vdev_t *vd, void *addr, uint64_t offset, uint64_t size,
+    boolean_t doread, boolean_t isdump)
+{
+	vdev_disk_t *dvd;
+	int c;
+	int numerrors = 0;
+
+	for (c = 0; c < vd->vdev_children; c++) {
+		ASSERT(vd->vdev_ops == &vdev_mirror_ops ||
+		    vd->vdev_ops == &vdev_replacing_ops ||
+		    vd->vdev_ops == &vdev_spare_ops);
+		int err = zvol_dumpio_vdev(vd->vdev_child[c],
+		    addr, offset, size, doread, isdump);
+		if (err != 0) {
+			numerrors++;
+		} else if (doread) {
+			break;
+		}
+	}
+
+	if (!vd->vdev_ops->vdev_op_leaf)
+		return (numerrors < vd->vdev_children ? 0 : EIO);
+
+	if (doread && !vdev_readable(vd))
+		return (EIO);
+	else if (!doread && !vdev_writeable(vd))
+		return (EIO);
+
+	dvd = vd->vdev_tsd;
+	ASSERT3P(dvd, !=, NULL);
+	offset += VDEV_LABEL_START_SIZE;
+
+	if (ddi_in_panic() || isdump) {
+		ASSERT(!doread);
+		if (doread)
+			return (EIO);
+		return (ldi_dump(dvd->vd_lh, addr, lbtodb(offset),
+		    lbtodb(size)));
+	} else {
+		return (vdev_disk_physio(dvd->vd_lh, addr, size, offset,
+		    doread ? B_READ : B_WRITE));
+	}
+}
+
+static int
+zvol_dumpio(zvol_state_t *zv, void *addr, uint64_t offset, uint64_t size,
+    boolean_t doread, boolean_t isdump)
+{
+	vdev_t *vd;
+	int error;
+	zvol_extent_t *ze;
+	spa_t *spa = dmu_objset_spa(zv->zv_objset);
+
+	/* Must be sector aligned, and not stradle a block boundary. */
+	if (P2PHASE(offset, DEV_BSIZE) || P2PHASE(size, DEV_BSIZE) ||
+	    P2BOUNDARY(offset, size, zv->zv_volblocksize)) {
+		return (EINVAL);
+	}
+	ASSERT(size <= zv->zv_volblocksize);
+
+	/* Locate the extent this belongs to */
+	ze = list_head(&zv->zv_extents);
+	while (offset >= ze->ze_nblks * zv->zv_volblocksize) {
+		offset -= ze->ze_nblks * zv->zv_volblocksize;
+		ze = list_next(&zv->zv_extents, ze);
+	}
+
+	if (!ddi_in_panic())
+		spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
+
+	vd = vdev_lookup_top(spa, DVA_GET_VDEV(&ze->ze_dva));
+	offset += DVA_GET_OFFSET(&ze->ze_dva);
+	error = zvol_dumpio_vdev(vd, addr, offset, size, doread, isdump);
+
+	if (!ddi_in_panic())
+		spa_config_exit(spa, SCL_STATE, FTAG);
+
+	return (error);
+}
+
+int
+zvol_strategy(buf_t *bp)
+{
+	zfs_soft_state_t *zs = NULL;
+	zvol_state_t *zv;
+	uint64_t off, volsize;
+	size_t resid;
+	char *addr;
+	objset_t *os;
+	rl_t *rl;
+	int error = 0;
+	boolean_t doread = bp->b_flags & B_READ;
+	boolean_t is_dump;
+	boolean_t sync;
+
+	if (getminor(bp->b_edev) == 0) {
+		error = EINVAL;
+	} else {
+		zs = ddi_get_soft_state(zfsdev_state, getminor(bp->b_edev));
+		if (zs == NULL)
+			error = ENXIO;
+		else if (zs->zss_type != ZSST_ZVOL)
+			error = EINVAL;
+	}
+
+	if (error) {
+		bioerror(bp, error);
+		biodone(bp);
+		return (0);
+	}
+
+	zv = zs->zss_data;
+
+	if (!(bp->b_flags & B_READ) && (zv->zv_flags & ZVOL_RDONLY)) {
+		bioerror(bp, EROFS);
+		biodone(bp);
+		return (0);
+	}
+
+	off = ldbtob(bp->b_blkno);
+	volsize = zv->zv_volsize;
+
+	os = zv->zv_objset;
+	ASSERT(os != NULL);
+
+	bp_mapin(bp);
+	addr = bp->b_un.b_addr;
+	resid = bp->b_bcount;
+
+	if (resid > 0 && (off < 0 || off >= volsize)) {
+		bioerror(bp, EIO);
+		biodone(bp);
+		return (0);
+	}
+
+	is_dump = zv->zv_flags & ZVOL_DUMPIFIED;
+	sync = ((!(bp->b_flags & B_ASYNC) &&
+	    !(zv->zv_flags & ZVOL_WCE)) ||
+	    (zv->zv_objset->os_sync == ZFS_SYNC_ALWAYS)) &&
+	    !doread && !is_dump;
+
+	/*
+	 * There must be no buffer changes when doing a dmu_sync() because
+	 * we can't change the data whilst calculating the checksum.
+	 */
+	rl = zfs_range_lock(&zv->zv_znode, off, resid,
+	    doread ? RL_READER : RL_WRITER);
+
+	while (resid != 0 && off < volsize) {
+		size_t size = MIN(resid, zvol_maxphys);
+		if (is_dump) {
+			size = MIN(size, P2END(off, zv->zv_volblocksize) - off);
+			error = zvol_dumpio(zv, addr, off, size,
+			    doread, B_FALSE);
+		} else if (doread) {
+			error = dmu_read(os, ZVOL_OBJ, off, size, addr,
+			    DMU_READ_PREFETCH);
+		} else {
+			dmu_tx_t *tx = dmu_tx_create(os);
+			dmu_tx_hold_write(tx, ZVOL_OBJ, off, size);
+			error = dmu_tx_assign(tx, TXG_WAIT);
+			if (error) {
+				dmu_tx_abort(tx);
+			} else {
+				dmu_write(os, ZVOL_OBJ, off, size, addr, tx);
+				zvol_log_write(zv, tx, off, size, sync);
+				dmu_tx_commit(tx);
+			}
+		}
+		if (error) {
+			/* convert checksum errors into IO errors */
+			if (error == ECKSUM)
+				error = EIO;
+			break;
+		}
+		off += size;
+		addr += size;
+		resid -= size;
+	}
+	zfs_range_unlock(rl);
+
+	if ((bp->b_resid = resid) == bp->b_bcount)
+		bioerror(bp, off > volsize ? EINVAL : error);
+
+	if (sync)
+		zil_commit(zv->zv_zilog, ZVOL_OBJ);
+	biodone(bp);
+
+	return (0);
+}
+
+/*
+ * Set the buffer count to the zvol maximum transfer.
+ * Using our own routine instead of the default minphys()
+ * means that for larger writes we write bigger buffers on X86
+ * (128K instead of 56K) and flush the disk write cache less often
+ * (every zvol_maxphys - currently 1MB) instead of minphys (currently
+ * 56K on X86 and 128K on sparc).
+ */
+void
+zvol_minphys(struct buf *bp)
+{
+	if (bp->b_bcount > zvol_maxphys)
+		bp->b_bcount = zvol_maxphys;
+}
+
+int
+zvol_dump(dev_t dev, caddr_t addr, daddr_t blkno, int nblocks)
+{
+	minor_t minor = getminor(dev);
+	zvol_state_t *zv;
+	int error = 0;
+	uint64_t size;
+	uint64_t boff;
+	uint64_t resid;
+
+	zv = zfsdev_get_soft_state(minor, ZSST_ZVOL);
+	if (zv == NULL)
+		return (ENXIO);
+
+	boff = ldbtob(blkno);
+	resid = ldbtob(nblocks);
+
+	VERIFY3U(boff + resid, <=, zv->zv_volsize);
+
+	while (resid) {
+		size = MIN(resid, P2END(boff, zv->zv_volblocksize) - boff);
+		error = zvol_dumpio(zv, addr, boff, size, B_FALSE, B_TRUE);
+		if (error)
+			break;
+		boff += size;
+		addr += size;
+		resid -= size;
+	}
+
+	return (error);
+}
+
+/*ARGSUSED*/
+int
+zvol_read(dev_t dev, uio_t *uio, cred_t *cr)
+{
+	minor_t minor = getminor(dev);
+	zvol_state_t *zv;
+	uint64_t volsize;
+	rl_t *rl;
+	int error = 0;
+
+	zv = zfsdev_get_soft_state(minor, ZSST_ZVOL);
+	if (zv == NULL)
+		return (ENXIO);
+
+	volsize = zv->zv_volsize;
+	if (uio->uio_resid > 0 &&
+	    (uio->uio_loffset < 0 || uio->uio_loffset >= volsize))
+		return (EIO);
+
+	if (zv->zv_flags & ZVOL_DUMPIFIED) {
+		error = physio(zvol_strategy, NULL, dev, B_READ,
+		    zvol_minphys, uio);
+		return (error);
+	}
+
+	rl = zfs_range_lock(&zv->zv_znode, uio->uio_loffset, uio->uio_resid,
+	    RL_READER);
+	while (uio->uio_resid > 0 && uio->uio_loffset < volsize) {
+		uint64_t bytes = MIN(uio->uio_resid, DMU_MAX_ACCESS >> 1);
+
+		/* don't read past the end */
+		if (bytes > volsize - uio->uio_loffset)
+			bytes = volsize - uio->uio_loffset;
+
+		error =  dmu_read_uio(zv->zv_objset, ZVOL_OBJ, uio, bytes);
+		if (error) {
+			/* convert checksum errors into IO errors */
+			if (error == ECKSUM)
+				error = EIO;
+			break;
+		}
+	}
+	zfs_range_unlock(rl);
+	return (error);
+}
+
+/*ARGSUSED*/
+int
+zvol_write(dev_t dev, uio_t *uio, cred_t *cr)
+{
+	minor_t minor = getminor(dev);
+	zvol_state_t *zv;
+	uint64_t volsize;
+	rl_t *rl;
+	int error = 0;
+	boolean_t sync;
+
+	zv = zfsdev_get_soft_state(minor, ZSST_ZVOL);
+	if (zv == NULL)
+		return (ENXIO);
+
+	volsize = zv->zv_volsize;
+	if (uio->uio_resid > 0 &&
+	    (uio->uio_loffset < 0 || uio->uio_loffset >= volsize))
+		return (EIO);
+
+	if (zv->zv_flags & ZVOL_DUMPIFIED) {
+		error = physio(zvol_strategy, NULL, dev, B_WRITE,
+		    zvol_minphys, uio);
+		return (error);
+	}
+
+	sync = !(zv->zv_flags & ZVOL_WCE) ||
+	    (zv->zv_objset->os_sync == ZFS_SYNC_ALWAYS);
+
+	rl = zfs_range_lock(&zv->zv_znode, uio->uio_loffset, uio->uio_resid,
+	    RL_WRITER);
+	while (uio->uio_resid > 0 && uio->uio_loffset < volsize) {
+		uint64_t bytes = MIN(uio->uio_resid, DMU_MAX_ACCESS >> 1);
+		uint64_t off = uio->uio_loffset;
+		dmu_tx_t *tx = dmu_tx_create(zv->zv_objset);
+
+		if (bytes > volsize - off)	/* don't write past the end */
+			bytes = volsize - off;
+
+		dmu_tx_hold_write(tx, ZVOL_OBJ, off, bytes);
+		error = dmu_tx_assign(tx, TXG_WAIT);
+		if (error) {
+			dmu_tx_abort(tx);
+			break;
+		}
+		error = dmu_write_uio_dbuf(zv->zv_dbuf, uio, bytes, tx);
+		if (error == 0)
+			zvol_log_write(zv, tx, off, bytes, sync);
+		dmu_tx_commit(tx);
+
+		if (error)
+			break;
+	}
+	zfs_range_unlock(rl);
+	if (sync)
+		zil_commit(zv->zv_zilog, ZVOL_OBJ);
+	return (error);
+}
+
+int
+zvol_getefi(void *arg, int flag, uint64_t vs, uint8_t bs)
+{
+	struct uuid uuid = EFI_RESERVED;
+	efi_gpe_t gpe = { 0 };
+	uint32_t crc;
+	dk_efi_t efi;
+	int length;
+	char *ptr;
+
+	if (ddi_copyin(arg, &efi, sizeof (dk_efi_t), flag))
+		return (EFAULT);
+	ptr = (char *)(uintptr_t)efi.dki_data_64;
+	length = efi.dki_length;
+	/*
+	 * Some clients may attempt to request a PMBR for the
+	 * zvol.  Currently this interface will return EINVAL to
+	 * such requests.  These requests could be supported by
+	 * adding a check for lba == 0 and consing up an appropriate
+	 * PMBR.
+	 */
+	if (efi.dki_lba < 1 || efi.dki_lba > 2 || length <= 0)
+		return (EINVAL);
+
+	gpe.efi_gpe_StartingLBA = LE_64(34ULL);
+	gpe.efi_gpe_EndingLBA = LE_64((vs >> bs) - 1);
+	UUID_LE_CONVERT(gpe.efi_gpe_PartitionTypeGUID, uuid);
+
+	if (efi.dki_lba == 1) {
+		efi_gpt_t gpt = { 0 };
+
+		gpt.efi_gpt_Signature = LE_64(EFI_SIGNATURE);
+		gpt.efi_gpt_Revision = LE_32(EFI_VERSION_CURRENT);
+		gpt.efi_gpt_HeaderSize = LE_32(sizeof (gpt));
+		gpt.efi_gpt_MyLBA = LE_64(1ULL);
+		gpt.efi_gpt_FirstUsableLBA = LE_64(34ULL);
+		gpt.efi_gpt_LastUsableLBA = LE_64((vs >> bs) - 1);
+		gpt.efi_gpt_PartitionEntryLBA = LE_64(2ULL);
+		gpt.efi_gpt_NumberOfPartitionEntries = LE_32(1);
+		gpt.efi_gpt_SizeOfPartitionEntry =
+		    LE_32(sizeof (efi_gpe_t));
+		CRC32(crc, &gpe, sizeof (gpe), -1U, crc32_table);
+		gpt.efi_gpt_PartitionEntryArrayCRC32 = LE_32(~crc);
+		CRC32(crc, &gpt, sizeof (gpt), -1U, crc32_table);
+		gpt.efi_gpt_HeaderCRC32 = LE_32(~crc);
+		if (ddi_copyout(&gpt, ptr, MIN(sizeof (gpt), length),
+		    flag))
+			return (EFAULT);
+		ptr += sizeof (gpt);
+		length -= sizeof (gpt);
+	}
+	if (length > 0 && ddi_copyout(&gpe, ptr, MIN(sizeof (gpe),
+	    length), flag))
+		return (EFAULT);
+	return (0);
+}
+
+/*
+ * BEGIN entry points to allow external callers access to the volume.
+ */
+/*
+ * Return the volume parameters needed for access from an external caller.
+ * These values are invariant as long as the volume is held open.
+ */
+int
+zvol_get_volume_params(minor_t minor, uint64_t *blksize,
+    uint64_t *max_xfer_len, void **minor_hdl, void **objset_hdl, void **zil_hdl,
+    void **rl_hdl, void **bonus_hdl)
+{
+	zvol_state_t *zv;
+
+	zv = zfsdev_get_soft_state(minor, ZSST_ZVOL);
+	if (zv == NULL)
+		return (ENXIO);
+	if (zv->zv_flags & ZVOL_DUMPIFIED)
+		return (ENXIO);
+
+	ASSERT(blksize && max_xfer_len && minor_hdl &&
+	    objset_hdl && zil_hdl && rl_hdl && bonus_hdl);
+
+	*blksize = zv->zv_volblocksize;
+	*max_xfer_len = (uint64_t)zvol_maxphys;
+	*minor_hdl = zv;
+	*objset_hdl = zv->zv_objset;
+	*zil_hdl = zv->zv_zilog;
+	*rl_hdl = &zv->zv_znode;
+	*bonus_hdl = zv->zv_dbuf;
+	return (0);
+}
+
+/*
+ * Return the current volume size to an external caller.
+ * The size can change while the volume is open.
+ */
+uint64_t
+zvol_get_volume_size(void *minor_hdl)
+{
+	zvol_state_t *zv = minor_hdl;
+
+	return (zv->zv_volsize);
+}
+
+/*
+ * Return the current WCE setting to an external caller.
+ * The WCE setting can change while the volume is open.
+ */
+int
+zvol_get_volume_wce(void *minor_hdl)
+{
+	zvol_state_t *zv = minor_hdl;
+
+	return ((zv->zv_flags & ZVOL_WCE) ? 1 : 0);
+}
+
+/*
+ * Entry point for external callers to zvol_log_write
+ */
+void
+zvol_log_write_minor(void *minor_hdl, dmu_tx_t *tx, offset_t off, ssize_t resid,
+    boolean_t sync)
+{
+	zvol_state_t *zv = minor_hdl;
+
+	zvol_log_write(zv, tx, off, resid, sync);
+}
+/*
+ * END entry points to allow external callers access to the volume.
+ */
+
+/*
+ * Dirtbag ioctls to support mkfs(1M) for UFS filesystems.  See dkio(7I).
+ */
+/*ARGSUSED*/
+int
+zvol_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
+{
+	zvol_state_t *zv;
+	struct dk_cinfo dki;
+	struct dk_minfo dkm;
+	struct dk_callback *dkc;
+	int error = 0;
+	rl_t *rl;
+
+	mutex_enter(&zfsdev_state_lock);
+
+	zv = zfsdev_get_soft_state(getminor(dev), ZSST_ZVOL);
+
+	if (zv == NULL) {
+		mutex_exit(&zfsdev_state_lock);
+		return (ENXIO);
+	}
+	ASSERT(zv->zv_total_opens > 0);
+
+	switch (cmd) {
+
+	case DKIOCINFO:
+		bzero(&dki, sizeof (dki));
+		(void) strcpy(dki.dki_cname, "zvol");
+		(void) strcpy(dki.dki_dname, "zvol");
+		dki.dki_ctype = DKC_UNKNOWN;
+		dki.dki_unit = getminor(dev);
+		dki.dki_maxtransfer = 1 << (SPA_MAXBLOCKSHIFT - zv->zv_min_bs);
+		mutex_exit(&zfsdev_state_lock);
+		if (ddi_copyout(&dki, (void *)arg, sizeof (dki), flag))
+			error = EFAULT;
+		return (error);
+
+	case DKIOCGMEDIAINFO:
+		bzero(&dkm, sizeof (dkm));
+		dkm.dki_lbsize = 1U << zv->zv_min_bs;
+		dkm.dki_capacity = zv->zv_volsize >> zv->zv_min_bs;
+		dkm.dki_media_type = DK_UNKNOWN;
+		mutex_exit(&zfsdev_state_lock);
+		if (ddi_copyout(&dkm, (void *)arg, sizeof (dkm), flag))
+			error = EFAULT;
+		return (error);
+
+	case DKIOCGETEFI:
+		{
+			uint64_t vs = zv->zv_volsize;
+			uint8_t bs = zv->zv_min_bs;
+
+			mutex_exit(&zfsdev_state_lock);
+			error = zvol_getefi((void *)arg, flag, vs, bs);
+			return (error);
+		}
+
+	case DKIOCFLUSHWRITECACHE:
+		dkc = (struct dk_callback *)arg;
+		mutex_exit(&zfsdev_state_lock);
+		zil_commit(zv->zv_zilog, ZVOL_OBJ);
+		if ((flag & FKIOCTL) && dkc != NULL && dkc->dkc_callback) {
+			(*dkc->dkc_callback)(dkc->dkc_cookie, error);
+			error = 0;
+		}
+		return (error);
+
+	case DKIOCGETWCE:
+		{
+			int wce = (zv->zv_flags & ZVOL_WCE) ? 1 : 0;
+			if (ddi_copyout(&wce, (void *)arg, sizeof (int),
+			    flag))
+				error = EFAULT;
+			break;
+		}
+	case DKIOCSETWCE:
+		{
+			int wce;
+			if (ddi_copyin((void *)arg, &wce, sizeof (int),
+			    flag)) {
+				error = EFAULT;
+				break;
+			}
+			if (wce) {
+				zv->zv_flags |= ZVOL_WCE;
+				mutex_exit(&zfsdev_state_lock);
+			} else {
+				zv->zv_flags &= ~ZVOL_WCE;
+				mutex_exit(&zfsdev_state_lock);
+				zil_commit(zv->zv_zilog, ZVOL_OBJ);
+			}
+			return (0);
+		}
+
+	case DKIOCGGEOM:
+	case DKIOCGVTOC:
+		/*
+		 * commands using these (like prtvtoc) expect ENOTSUP
+		 * since we're emulating an EFI label
+		 */
+		error = ENOTSUP;
+		break;
+
+	case DKIOCDUMPINIT:
+		rl = zfs_range_lock(&zv->zv_znode, 0, zv->zv_volsize,
+		    RL_WRITER);
+		error = zvol_dumpify(zv);
+		zfs_range_unlock(rl);
+		break;
+
+	case DKIOCDUMPFINI:
+		if (!(zv->zv_flags & ZVOL_DUMPIFIED))
+			break;
+		rl = zfs_range_lock(&zv->zv_znode, 0, zv->zv_volsize,
+		    RL_WRITER);
+		error = zvol_dump_fini(zv);
+		zfs_range_unlock(rl);
+		break;
+
+	default:
+		error = ENOTTY;
+		break;
+
+	}
+	mutex_exit(&zfsdev_state_lock);
+	return (error);
+}
+
+int
+zvol_busy(void)
+{
+	return (zvol_minors != 0);
+}
+
+void
+zvol_init(void)
+{
+	VERIFY(ddi_soft_state_init(&zfsdev_state, sizeof (zfs_soft_state_t),
+	    1) == 0);
+	mutex_init(&zfsdev_state_lock, NULL, MUTEX_DEFAULT, NULL);
+}
+
+void
+zvol_fini(void)
+{
+	mutex_destroy(&zfsdev_state_lock);
+	ddi_soft_state_fini(&zfsdev_state);
+}
+
+static int
+zvol_dump_init(zvol_state_t *zv, boolean_t resize)
+{
+	dmu_tx_t *tx;
+	int error = 0;
+	objset_t *os = zv->zv_objset;
+	nvlist_t *nv = NULL;
+	uint64_t version = spa_version(dmu_objset_spa(zv->zv_objset));
+
+	ASSERT(MUTEX_HELD(&zfsdev_state_lock));
+	error = dmu_free_long_range(zv->zv_objset, ZVOL_OBJ, 0,
+	    DMU_OBJECT_END);
+	/* wait for dmu_free_long_range to actually free the blocks */
+	txg_wait_synced(dmu_objset_pool(zv->zv_objset), 0);
+
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_zap(tx, ZVOL_ZAP_OBJ, TRUE, NULL);
+	dmu_tx_hold_bonus(tx, ZVOL_OBJ);
+	error = dmu_tx_assign(tx, TXG_WAIT);
+	if (error) {
+		dmu_tx_abort(tx);
+		return (error);
+	}
+
+	/*
+	 * If we are resizing the dump device then we only need to
+	 * update the refreservation to match the newly updated
+	 * zvolsize. Otherwise, we save off the original state of the
+	 * zvol so that we can restore them if the zvol is ever undumpified.
+	 */
+	if (resize) {
+		error = zap_update(os, ZVOL_ZAP_OBJ,
+		    zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 8, 1,
+		    &zv->zv_volsize, tx);
+	} else {
+		uint64_t checksum, compress, refresrv, vbs, dedup;
+
+		error = dsl_prop_get_integer(zv->zv_name,
+		    zfs_prop_to_name(ZFS_PROP_COMPRESSION), &compress, NULL);
+		error = error ? error : dsl_prop_get_integer(zv->zv_name,
+		    zfs_prop_to_name(ZFS_PROP_CHECKSUM), &checksum, NULL);
+		error = error ? error : dsl_prop_get_integer(zv->zv_name,
+		    zfs_prop_to_name(ZFS_PROP_REFRESERVATION), &refresrv, NULL);
+		error = error ? error : dsl_prop_get_integer(zv->zv_name,
+		    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), &vbs, NULL);
+		if (version >= SPA_VERSION_DEDUP) {
+			error = error ? error :
+			    dsl_prop_get_integer(zv->zv_name,
+			    zfs_prop_to_name(ZFS_PROP_DEDUP), &dedup, NULL);
+		}
+
+		error = error ? error : zap_update(os, ZVOL_ZAP_OBJ,
+		    zfs_prop_to_name(ZFS_PROP_COMPRESSION), 8, 1,
+		    &compress, tx);
+		error = error ? error : zap_update(os, ZVOL_ZAP_OBJ,
+		    zfs_prop_to_name(ZFS_PROP_CHECKSUM), 8, 1, &checksum, tx);
+		error = error ? error : zap_update(os, ZVOL_ZAP_OBJ,
+		    zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 8, 1,
+		    &refresrv, tx);
+		error = error ? error : zap_update(os, ZVOL_ZAP_OBJ,
+		    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 8, 1,
+		    &vbs, tx);
+		error = error ? error : dmu_object_set_blocksize(
+		    os, ZVOL_OBJ, SPA_MAXBLOCKSIZE, 0, tx);
+		if (version >= SPA_VERSION_DEDUP) {
+			error = error ? error : zap_update(os, ZVOL_ZAP_OBJ,
+			    zfs_prop_to_name(ZFS_PROP_DEDUP), 8, 1,
+			    &dedup, tx);
+		}
+		if (error == 0)
+			zv->zv_volblocksize = SPA_MAXBLOCKSIZE;
+	}
+	dmu_tx_commit(tx);
+
+	/*
+	 * We only need update the zvol's property if we are initializing
+	 * the dump area for the first time.
+	 */
+	if (!resize) {
+		VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+		VERIFY(nvlist_add_uint64(nv,
+		    zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 0) == 0);
+		VERIFY(nvlist_add_uint64(nv,
+		    zfs_prop_to_name(ZFS_PROP_COMPRESSION),
+		    ZIO_COMPRESS_OFF) == 0);
+		VERIFY(nvlist_add_uint64(nv,
+		    zfs_prop_to_name(ZFS_PROP_CHECKSUM),
+		    ZIO_CHECKSUM_OFF) == 0);
+		if (version >= SPA_VERSION_DEDUP) {
+			VERIFY(nvlist_add_uint64(nv,
+			    zfs_prop_to_name(ZFS_PROP_DEDUP),
+			    ZIO_CHECKSUM_OFF) == 0);
+		}
+
+		error = zfs_set_prop_nvlist(zv->zv_name, ZPROP_SRC_LOCAL,
+		    nv, NULL);
+		nvlist_free(nv);
+
+		if (error)
+			return (error);
+	}
+
+	/* Allocate the space for the dump */
+	error = zvol_prealloc(zv);
+	return (error);
+}
+
+static int
+zvol_dumpify(zvol_state_t *zv)
+{
+	int error = 0;
+	uint64_t dumpsize = 0;
+	dmu_tx_t *tx;
+	objset_t *os = zv->zv_objset;
+
+	if (zv->zv_flags & ZVOL_RDONLY)
+		return (EROFS);
+
+	if (zap_lookup(zv->zv_objset, ZVOL_ZAP_OBJ, ZVOL_DUMPSIZE,
+	    8, 1, &dumpsize) != 0 || dumpsize != zv->zv_volsize) {
+		boolean_t resize = (dumpsize > 0) ? B_TRUE : B_FALSE;
+
+		if ((error = zvol_dump_init(zv, resize)) != 0) {
+			(void) zvol_dump_fini(zv);
+			return (error);
+		}
+	}
+
+	/*
+	 * Build up our lba mapping.
+	 */
+	error = zvol_get_lbas(zv);
+	if (error) {
+		(void) zvol_dump_fini(zv);
+		return (error);
+	}
+
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_zap(tx, ZVOL_ZAP_OBJ, TRUE, NULL);
+	error = dmu_tx_assign(tx, TXG_WAIT);
+	if (error) {
+		dmu_tx_abort(tx);
+		(void) zvol_dump_fini(zv);
+		return (error);
+	}
+
+	zv->zv_flags |= ZVOL_DUMPIFIED;
+	error = zap_update(os, ZVOL_ZAP_OBJ, ZVOL_DUMPSIZE, 8, 1,
+	    &zv->zv_volsize, tx);
+	dmu_tx_commit(tx);
+
+	if (error) {
+		(void) zvol_dump_fini(zv);
+		return (error);
+	}
+
+	txg_wait_synced(dmu_objset_pool(os), 0);
+	return (0);
+}
+
+static int
+zvol_dump_fini(zvol_state_t *zv)
+{
+	dmu_tx_t *tx;
+	objset_t *os = zv->zv_objset;
+	nvlist_t *nv;
+	int error = 0;
+	uint64_t checksum, compress, refresrv, vbs, dedup;
+	uint64_t version = spa_version(dmu_objset_spa(zv->zv_objset));
+
+	/*
+	 * Attempt to restore the zvol back to its pre-dumpified state.
+	 * This is a best-effort attempt as it's possible that not all
+	 * of these properties were initialized during the dumpify process
+	 * (i.e. error during zvol_dump_init).
+	 */
+
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_zap(tx, ZVOL_ZAP_OBJ, TRUE, NULL);
+	error = dmu_tx_assign(tx, TXG_WAIT);
+	if (error) {
+		dmu_tx_abort(tx);
+		return (error);
+	}
+	(void) zap_remove(os, ZVOL_ZAP_OBJ, ZVOL_DUMPSIZE, tx);
+	dmu_tx_commit(tx);
+
+	(void) zap_lookup(zv->zv_objset, ZVOL_ZAP_OBJ,
+	    zfs_prop_to_name(ZFS_PROP_CHECKSUM), 8, 1, &checksum);
+	(void) zap_lookup(zv->zv_objset, ZVOL_ZAP_OBJ,
+	    zfs_prop_to_name(ZFS_PROP_COMPRESSION), 8, 1, &compress);
+	(void) zap_lookup(zv->zv_objset, ZVOL_ZAP_OBJ,
+	    zfs_prop_to_name(ZFS_PROP_REFRESERVATION), 8, 1, &refresrv);
+	(void) zap_lookup(zv->zv_objset, ZVOL_ZAP_OBJ,
+	    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 8, 1, &vbs);
+
+	VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	(void) nvlist_add_uint64(nv,
+	    zfs_prop_to_name(ZFS_PROP_CHECKSUM), checksum);
+	(void) nvlist_add_uint64(nv,
+	    zfs_prop_to_name(ZFS_PROP_COMPRESSION), compress);
+	(void) nvlist_add_uint64(nv,
+	    zfs_prop_to_name(ZFS_PROP_REFRESERVATION), refresrv);
+	if (version >= SPA_VERSION_DEDUP &&
+	    zap_lookup(zv->zv_objset, ZVOL_ZAP_OBJ,
+	    zfs_prop_to_name(ZFS_PROP_DEDUP), 8, 1, &dedup) == 0) {
+		(void) nvlist_add_uint64(nv,
+		    zfs_prop_to_name(ZFS_PROP_DEDUP), dedup);
+	}
+	(void) zfs_set_prop_nvlist(zv->zv_name, ZPROP_SRC_LOCAL,
+	    nv, NULL);
+	nvlist_free(nv);
+
+	zvol_free_extents(zv);
+	zv->zv_flags &= ~ZVOL_DUMPIFIED;
+	(void) dmu_free_long_range(os, ZVOL_OBJ, 0, DMU_OBJECT_END);
+	/* wait for dmu_free_long_range to actually free the blocks */
+	txg_wait_synced(dmu_objset_pool(zv->zv_objset), 0);
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_bonus(tx, ZVOL_OBJ);
+	error = dmu_tx_assign(tx, TXG_WAIT);
+	if (error) {
+		dmu_tx_abort(tx);
+		return (error);
+	}
+	if (dmu_object_set_blocksize(os, ZVOL_OBJ, vbs, 0, tx) == 0)
+		zv->zv_volblocksize = vbs;
+	dmu_tx_commit(tx);
+
+	return (0);
+}
diff --git a/uts/common/os/callb.c b/uts/common/os/callb.c
new file mode 100644
index 000000000000..5c98caac907f
--- /dev/null
+++ b/uts/common/os/callb.c
@@ -0,0 +1,410 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/param.h>
+#include <sys/t_lock.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/sysmacros.h>
+#include <sys/systm.h>
+#include <sys/cpuvar.h>
+#include <sys/user.h>
+#include <sys/proc.h>
+#include <sys/callb.h>
+#include <sys/kmem.h>
+#include <sys/cmn_err.h>
+#include <sys/swap.h>
+#include <sys/vmsystm.h>
+#include <sys/class.h>
+#include <sys/debug.h>
+#include <sys/thread.h>
+#include <sys/kobj.h>
+#include <sys/ddi.h>	/* for delay() */
+#include <sys/taskq.h>  /* For TASKQ_NAMELEN */
+
+#define	CB_MAXNAME	TASKQ_NAMELEN
+
+/*
+ * The callb mechanism provides generic event scheduling/echoing.
+ * A callb function is registered and called on behalf of the event.
+ */
+typedef struct callb {
+	struct callb	*c_next; 	/* next in class or on freelist */
+	kthread_id_t	c_thread;	/* ptr to caller's thread struct */
+	char		c_flag;		/* info about the callb state */
+	uchar_t		c_class;	/* this callb's class */
+	kcondvar_t	c_done_cv;	/* signal callb completion */
+	boolean_t	(*c_func)();	/* cb function: returns true if ok */
+	void		*c_arg;		/* arg to c_func */
+	char		c_name[CB_MAXNAME+1]; /* debug:max func name length */
+} callb_t;
+
+/*
+ * callb c_flag bitmap definitions
+ */
+#define	CALLB_FREE		0x0
+#define	CALLB_TAKEN		0x1
+#define	CALLB_EXECUTING		0x2
+
+/*
+ * Basic structure for a callb table.
+ * All callbs are organized into different class groups described
+ * by ct_class array.
+ * The callbs within a class are single-linked and normally run by a
+ * serial execution.
+ */
+typedef struct callb_table {
+	kmutex_t ct_lock;		/* protect all callb states */
+	callb_t	*ct_freelist; 		/* free callb structures */
+	int	ct_busy;		/* != 0 prevents additions */
+	kcondvar_t ct_busy_cv;		/* to wait for not busy    */
+	int	ct_ncallb; 		/* num of callbs allocated */
+	callb_t	*ct_first_cb[NCBCLASS];	/* ptr to 1st callb in a class */
+} callb_table_t;
+
+int callb_timeout_sec = CPR_KTHREAD_TIMEOUT_SEC;
+
+static callb_id_t callb_add_common(boolean_t (*)(void *, int),
+    void *, int, char *, kthread_id_t);
+
+static callb_table_t callb_table;	/* system level callback table */
+static callb_table_t *ct = &callb_table;
+static kmutex_t	callb_safe_mutex;
+callb_cpr_t	callb_cprinfo_safe = {
+	&callb_safe_mutex, CALLB_CPR_ALWAYS_SAFE, 0, 0, 0 };
+
+/*
+ * Init all callb tables in the system.
+ */
+void
+callb_init()
+{
+	callb_table.ct_busy = 0;	/* mark table open for additions */
+	mutex_init(&callb_safe_mutex, NULL, MUTEX_DEFAULT, NULL);
+	mutex_init(&callb_table.ct_lock, NULL, MUTEX_DEFAULT, NULL);
+}
+
+/*
+ * callout_add() is called to register func() be called later.
+ */
+static callb_id_t
+callb_add_common(boolean_t (*func)(void *arg, int code),
+    void *arg, int class, char *name, kthread_id_t t)
+{
+	callb_t *cp;
+
+	ASSERT(class < NCBCLASS);
+
+	mutex_enter(&ct->ct_lock);
+	while (ct->ct_busy)
+		cv_wait(&ct->ct_busy_cv, &ct->ct_lock);
+	if ((cp = ct->ct_freelist) == NULL) {
+		ct->ct_ncallb++;
+		cp = (callb_t *)kmem_zalloc(sizeof (callb_t), KM_SLEEP);
+	}
+	ct->ct_freelist = cp->c_next;
+	cp->c_thread = t;
+	cp->c_func = func;
+	cp->c_arg = arg;
+	cp->c_class = (uchar_t)class;
+	cp->c_flag |= CALLB_TAKEN;
+#ifdef DEBUG
+	if (strlen(name) > CB_MAXNAME)
+		cmn_err(CE_WARN, "callb_add: name of callback function '%s' "
+		    "too long -- truncated to %d chars",
+		    name, CB_MAXNAME);
+#endif
+	(void) strncpy(cp->c_name, name, CB_MAXNAME);
+	cp->c_name[CB_MAXNAME] = '\0';
+
+	/*
+	 * Insert the new callb at the head of its class list.
+	 */
+	cp->c_next = ct->ct_first_cb[class];
+	ct->ct_first_cb[class] = cp;
+
+	mutex_exit(&ct->ct_lock);
+	return ((callb_id_t)cp);
+}
+
+/*
+ * The default function to add an entry to the callback table.  Since
+ * it uses curthread as the thread identifier to store in the table,
+ * it should be used for the normal case of a thread which is calling
+ * to add ITSELF to the table.
+ */
+callb_id_t
+callb_add(boolean_t (*func)(void *arg, int code),
+    void *arg, int class, char *name)
+{
+	return (callb_add_common(func, arg, class, name, curthread));
+}
+
+/*
+ * A special version of callb_add() above for use by threads which
+ * might be adding an entry to the table on behalf of some other
+ * thread (for example, one which is constructed but not yet running).
+ * In this version the thread id is an argument.
+ */
+callb_id_t
+callb_add_thread(boolean_t (*func)(void *arg, int code),
+    void *arg, int class, char *name, kthread_id_t t)
+{
+	return (callb_add_common(func, arg, class, name, t));
+}
+
+/*
+ * callout_delete() is called to remove an entry identified by id
+ * that was originally placed there by a call to callout_add().
+ * return -1 if fail to delete a callb entry otherwise return 0.
+ */
+int
+callb_delete(callb_id_t id)
+{
+	callb_t **pp;
+	callb_t *me = (callb_t *)id;
+
+	mutex_enter(&ct->ct_lock);
+
+	for (;;) {
+		pp = &ct->ct_first_cb[me->c_class];
+		while (*pp != NULL && *pp != me)
+			pp = &(*pp)->c_next;
+
+#ifdef DEBUG
+		if (*pp != me) {
+			cmn_err(CE_WARN, "callb delete bogus entry 0x%p",
+			    (void *)me);
+			mutex_exit(&ct->ct_lock);
+			return (-1);
+		}
+#endif /* DEBUG */
+
+		/*
+		 * It is not allowed to delete a callb in the middle of
+		 * executing otherwise, the callb_execute() will be confused.
+		 */
+		if (!(me->c_flag & CALLB_EXECUTING))
+			break;
+
+		cv_wait(&me->c_done_cv, &ct->ct_lock);
+	}
+	/* relink the class list */
+	*pp = me->c_next;
+
+	/* clean up myself and return the free callb to the head of freelist */
+	me->c_flag = CALLB_FREE;
+	me->c_next = ct->ct_freelist;
+	ct->ct_freelist = me;
+
+	mutex_exit(&ct->ct_lock);
+	return (0);
+}
+
+/*
+ * class:	indicates to execute all callbs in the same class;
+ * code:	optional argument for the callb functions.
+ * return:	 = 0: success
+ *		!= 0: ptr to string supplied when callback was registered
+ */
+void *
+callb_execute_class(int class, int code)
+{
+	callb_t *cp;
+	void *ret = NULL;
+
+	ASSERT(class < NCBCLASS);
+
+	mutex_enter(&ct->ct_lock);
+
+	for (cp = ct->ct_first_cb[class];
+	    cp != NULL && ret == 0; cp = cp->c_next) {
+		while (cp->c_flag & CALLB_EXECUTING)
+			cv_wait(&cp->c_done_cv, &ct->ct_lock);
+		/*
+		 * cont if the callb is deleted while we're sleeping
+		 */
+		if (cp->c_flag == CALLB_FREE)
+			continue;
+		cp->c_flag |= CALLB_EXECUTING;
+
+#ifdef CALLB_DEBUG
+		printf("callb_execute: name=%s func=%p arg=%p\n",
+		    cp->c_name, (void *)cp->c_func, (void *)cp->c_arg);
+#endif /* CALLB_DEBUG */
+
+		mutex_exit(&ct->ct_lock);
+		/* If callback function fails, pass back client's name */
+		if (!(*cp->c_func)(cp->c_arg, code))
+			ret = cp->c_name;
+		mutex_enter(&ct->ct_lock);
+
+		cp->c_flag &= ~CALLB_EXECUTING;
+		cv_broadcast(&cp->c_done_cv);
+	}
+	mutex_exit(&ct->ct_lock);
+	return (ret);
+}
+
+/*
+ * callers make sure no recursive entries to this func.
+ * dp->cc_lockp is registered by callb_add to protect callb_cpr_t structure.
+ *
+ * When calling to stop a kernel thread (code == CB_CODE_CPR_CHKPT) we
+ * use a cv_timedwait() in case the kernel thread is blocked.
+ *
+ * Note that this is a generic callback handler for daemon CPR and
+ * should NOT be changed to accommodate any specific requirement in a daemon.
+ * Individual daemons that require changes to the handler shall write
+ * callback routines in their own daemon modules.
+ */
+boolean_t
+callb_generic_cpr(void *arg, int code)
+{
+	callb_cpr_t *cp = (callb_cpr_t *)arg;
+	clock_t ret = 0;			/* assume success */
+
+	mutex_enter(cp->cc_lockp);
+
+	switch (code) {
+	case CB_CODE_CPR_CHKPT:
+		cp->cc_events |= CALLB_CPR_START;
+#ifdef CPR_NOT_THREAD_SAFE
+		while (!(cp->cc_events & CALLB_CPR_SAFE))
+			/* cv_timedwait() returns -1 if it times out. */
+			if ((ret = cv_reltimedwait(&cp->cc_callb_cv,
+			    cp->cc_lockp, (callb_timeout_sec * hz),
+			    TR_CLOCK_TICK)) == -1)
+				break;
+#endif
+		break;
+
+	case CB_CODE_CPR_RESUME:
+		cp->cc_events &= ~CALLB_CPR_START;
+		cv_signal(&cp->cc_stop_cv);
+		break;
+	}
+	mutex_exit(cp->cc_lockp);
+	return (ret != -1);
+}
+
+/*
+ * The generic callback function associated with kernel threads which
+ * are always considered safe.
+ */
+/* ARGSUSED */
+boolean_t
+callb_generic_cpr_safe(void *arg, int code)
+{
+	return (B_TRUE);
+}
+/*
+ * Prevent additions to callback table.
+ */
+void
+callb_lock_table(void)
+{
+	mutex_enter(&ct->ct_lock);
+	ASSERT(ct->ct_busy == 0);
+	ct->ct_busy = 1;
+	mutex_exit(&ct->ct_lock);
+}
+
+/*
+ * Allow additions to callback table.
+ */
+void
+callb_unlock_table(void)
+{
+	mutex_enter(&ct->ct_lock);
+	ASSERT(ct->ct_busy != 0);
+	ct->ct_busy = 0;
+	cv_broadcast(&ct->ct_busy_cv);
+	mutex_exit(&ct->ct_lock);
+}
+
+/*
+ * Return a boolean value indicating whether a particular kernel thread is
+ * stopped in accordance with the cpr callback protocol.  If returning
+ * false, also return a pointer to the thread name via the 2nd argument.
+ */
+boolean_t
+callb_is_stopped(kthread_id_t tp, caddr_t *thread_name)
+{
+	callb_t *cp;
+	boolean_t ret_val;
+
+	mutex_enter(&ct->ct_lock);
+
+	for (cp = ct->ct_first_cb[CB_CL_CPR_DAEMON];
+	    cp != NULL && tp != cp->c_thread; cp = cp->c_next)
+		;
+
+	ret_val = (cp != NULL);
+	if (ret_val) {
+		/*
+		 * We found the thread in the callback table and have
+		 * provisionally set the return value to true.  Now
+		 * see if it is marked "safe" and is sleeping or stopped.
+		 */
+		callb_cpr_t *ccp = (callb_cpr_t *)cp->c_arg;
+
+		*thread_name = cp->c_name;	/* in case not stopped */
+		mutex_enter(ccp->cc_lockp);
+
+		if (ccp->cc_events & CALLB_CPR_SAFE) {
+			int retry;
+
+			mutex_exit(ccp->cc_lockp);
+			for (retry = 0; retry < CALLB_MAX_RETRY; retry++) {
+				thread_lock(tp);
+				if (tp->t_state & (TS_SLEEP | TS_STOPPED)) {
+					thread_unlock(tp);
+					break;
+				}
+				thread_unlock(tp);
+				delay(CALLB_THREAD_DELAY);
+			}
+			ret_val = retry < CALLB_MAX_RETRY;
+		} else {
+			ret_val =
+			    (ccp->cc_events & CALLB_CPR_ALWAYS_SAFE) != 0;
+			mutex_exit(ccp->cc_lockp);
+		}
+	} else {
+		/*
+		 * Thread not found in callback table.  Make the best
+		 * attempt to identify the thread in the error message.
+		 */
+		ulong_t offset;
+		char *sym = kobj_getsymname((uintptr_t)tp->t_startpc,
+		    &offset);
+
+		*thread_name = sym ? sym : "*unknown*";
+	}
+
+	mutex_exit(&ct->ct_lock);
+	return (ret_val);
+}
diff --git a/uts/common/os/fm.c b/uts/common/os/fm.c
new file mode 100644
index 000000000000..4efcff4f464a
--- /dev/null
+++ b/uts/common/os/fm.c
@@ -0,0 +1,1386 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * Fault Management Architecture (FMA) Resource and Protocol Support
+ *
+ * The routines contained herein provide services to support kernel subsystems
+ * in publishing fault management telemetry (see PSARC 2002/412 and 2003/089).
+ *
+ * Name-Value Pair Lists
+ *
+ * The embodiment of an FMA protocol element (event, fmri or authority) is a
+ * name-value pair list (nvlist_t).  FMA-specific nvlist construtor and
+ * destructor functions, fm_nvlist_create() and fm_nvlist_destroy(), are used
+ * to create an nvpair list using custom allocators.  Callers may choose to
+ * allocate either from the kernel memory allocator, or from a preallocated
+ * buffer, useful in constrained contexts like high-level interrupt routines.
+ *
+ * Protocol Event and FMRI Construction
+ *
+ * Convenience routines are provided to construct nvlist events according to
+ * the FMA Event Protocol and Naming Schema specification for ereports and
+ * FMRIs for the dev, cpu, hc, mem, legacy hc and de schemes.
+ *
+ * ENA Manipulation
+ *
+ * Routines to generate ENA formats 0, 1 and 2 are available as well as
+ * routines to increment formats 1 and 2.  Individual fields within the
+ * ENA are extractable via fm_ena_time_get(), fm_ena_id_get(),
+ * fm_ena_format_get() and fm_ena_gen_get().
+ */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/sysevent.h>
+#include <sys/sysevent_impl.h>
+#include <sys/nvpair.h>
+#include <sys/cmn_err.h>
+#include <sys/cpuvar.h>
+#include <sys/sysmacros.h>
+#include <sys/systm.h>
+#include <sys/ddifm.h>
+#include <sys/ddifm_impl.h>
+#include <sys/spl.h>
+#include <sys/dumphdr.h>
+#include <sys/compress.h>
+#include <sys/cpuvar.h>
+#include <sys/console.h>
+#include <sys/panic.h>
+#include <sys/kobj.h>
+#include <sys/sunddi.h>
+#include <sys/systeminfo.h>
+#include <sys/sysevent/eventdefs.h>
+#include <sys/fm/util.h>
+#include <sys/fm/protocol.h>
+
+/*
+ * URL and SUNW-MSG-ID value to display for fm_panic(), defined below.  These
+ * values must be kept in sync with the FMA source code in usr/src/cmd/fm.
+ */
+static const char *fm_url = "http://www.sun.com/msg";
+static const char *fm_msgid = "SUNOS-8000-0G";
+static char *volatile fm_panicstr = NULL;
+
+errorq_t *ereport_errorq;
+void *ereport_dumpbuf;
+size_t ereport_dumplen;
+
+static uint_t ereport_chanlen = ERPT_EVCH_MAX;
+static evchan_t *ereport_chan = NULL;
+static ulong_t ereport_qlen = 0;
+static size_t ereport_size = 0;
+static int ereport_cols = 80;
+
+extern void fastreboot_disable_highpil(void);
+
+/*
+ * Common fault management kstats to record ereport generation
+ * failures
+ */
+
+struct erpt_kstat {
+	kstat_named_t	erpt_dropped;		/* num erpts dropped on post */
+	kstat_named_t	erpt_set_failed;	/* num erpt set failures */
+	kstat_named_t	fmri_set_failed;	/* num fmri set failures */
+	kstat_named_t	payload_set_failed;	/* num payload set failures */
+};
+
+static struct erpt_kstat erpt_kstat_data = {
+	{ "erpt-dropped", KSTAT_DATA_UINT64 },
+	{ "erpt-set-failed", KSTAT_DATA_UINT64 },
+	{ "fmri-set-failed", KSTAT_DATA_UINT64 },
+	{ "payload-set-failed", KSTAT_DATA_UINT64 }
+};
+
+/*ARGSUSED*/
+static void
+fm_drain(void *private, void *data, errorq_elem_t *eep)
+{
+	nvlist_t *nvl = errorq_elem_nvl(ereport_errorq, eep);
+
+	if (!panicstr)
+		(void) fm_ereport_post(nvl, EVCH_TRYHARD);
+	else
+		fm_nvprint(nvl);
+}
+
+void
+fm_init(void)
+{
+	kstat_t *ksp;
+
+	(void) sysevent_evc_bind(FM_ERROR_CHAN,
+	    &ereport_chan, EVCH_CREAT | EVCH_HOLD_PEND);
+
+	(void) sysevent_evc_control(ereport_chan,
+	    EVCH_SET_CHAN_LEN, &ereport_chanlen);
+
+	if (ereport_qlen == 0)
+		ereport_qlen = ERPT_MAX_ERRS * MAX(max_ncpus, 4);
+
+	if (ereport_size == 0)
+		ereport_size = ERPT_DATA_SZ;
+
+	ereport_errorq = errorq_nvcreate("fm_ereport_queue",
+	    (errorq_func_t)fm_drain, NULL, ereport_qlen, ereport_size,
+	    FM_ERR_PIL, ERRORQ_VITAL);
+	if (ereport_errorq == NULL)
+		panic("failed to create required ereport error queue");
+
+	ereport_dumpbuf = kmem_alloc(ereport_size, KM_SLEEP);
+	ereport_dumplen = ereport_size;
+
+	/* Initialize ereport allocation and generation kstats */
+	ksp = kstat_create("unix", 0, "fm", "misc", KSTAT_TYPE_NAMED,
+	    sizeof (struct erpt_kstat) / sizeof (kstat_named_t),
+	    KSTAT_FLAG_VIRTUAL);
+
+	if (ksp != NULL) {
+		ksp->ks_data = &erpt_kstat_data;
+		kstat_install(ksp);
+	} else {
+		cmn_err(CE_NOTE, "failed to create fm/misc kstat\n");
+
+	}
+}
+
+/*
+ * Formatting utility function for fm_nvprintr.  We attempt to wrap chunks of
+ * output so they aren't split across console lines, and return the end column.
+ */
+/*PRINTFLIKE4*/
+static int
+fm_printf(int depth, int c, int cols, const char *format, ...)
+{
+	va_list ap;
+	int width;
+	char c1;
+
+	va_start(ap, format);
+	width = vsnprintf(&c1, sizeof (c1), format, ap);
+	va_end(ap);
+
+	if (c + width >= cols) {
+		console_printf("\n\r");
+		c = 0;
+		if (format[0] != ' ' && depth > 0) {
+			console_printf(" ");
+			c++;
+		}
+	}
+
+	va_start(ap, format);
+	console_vprintf(format, ap);
+	va_end(ap);
+
+	return ((c + width) % cols);
+}
+
+/*
+ * Recursively print a nvlist in the specified column width and return the
+ * column we end up in.  This function is called recursively by fm_nvprint(),
+ * below.  We generically format the entire nvpair using hexadecimal
+ * integers and strings, and elide any integer arrays.  Arrays are basically
+ * used for cache dumps right now, so we suppress them so as not to overwhelm
+ * the amount of console output we produce at panic time.  This can be further
+ * enhanced as FMA technology grows based upon the needs of consumers.  All
+ * FMA telemetry is logged using the dump device transport, so the console
+ * output serves only as a fallback in case this procedure is unsuccessful.
+ */
+static int
+fm_nvprintr(nvlist_t *nvl, int d, int c, int cols)
+{
+	nvpair_t *nvp;
+
+	for (nvp = nvlist_next_nvpair(nvl, NULL);
+	    nvp != NULL; nvp = nvlist_next_nvpair(nvl, nvp)) {
+
+		data_type_t type = nvpair_type(nvp);
+		const char *name = nvpair_name(nvp);
+
+		boolean_t b;
+		uint8_t i8;
+		uint16_t i16;
+		uint32_t i32;
+		uint64_t i64;
+		char *str;
+		nvlist_t *cnv;
+
+		if (strcmp(name, FM_CLASS) == 0)
+			continue; /* already printed by caller */
+
+		c = fm_printf(d, c, cols, " %s=", name);
+
+		switch (type) {
+		case DATA_TYPE_BOOLEAN:
+			c = fm_printf(d + 1, c, cols, " 1");
+			break;
+
+		case DATA_TYPE_BOOLEAN_VALUE:
+			(void) nvpair_value_boolean_value(nvp, &b);
+			c = fm_printf(d + 1, c, cols, b ? "1" : "0");
+			break;
+
+		case DATA_TYPE_BYTE:
+			(void) nvpair_value_byte(nvp, &i8);
+			c = fm_printf(d + 1, c, cols, "%x", i8);
+			break;
+
+		case DATA_TYPE_INT8:
+			(void) nvpair_value_int8(nvp, (void *)&i8);
+			c = fm_printf(d + 1, c, cols, "%x", i8);
+			break;
+
+		case DATA_TYPE_UINT8:
+			(void) nvpair_value_uint8(nvp, &i8);
+			c = fm_printf(d + 1, c, cols, "%x", i8);
+			break;
+
+		case DATA_TYPE_INT16:
+			(void) nvpair_value_int16(nvp, (void *)&i16);
+			c = fm_printf(d + 1, c, cols, "%x", i16);
+			break;
+
+		case DATA_TYPE_UINT16:
+			(void) nvpair_value_uint16(nvp, &i16);
+			c = fm_printf(d + 1, c, cols, "%x", i16);
+			break;
+
+		case DATA_TYPE_INT32:
+			(void) nvpair_value_int32(nvp, (void *)&i32);
+			c = fm_printf(d + 1, c, cols, "%x", i32);
+			break;
+
+		case DATA_TYPE_UINT32:
+			(void) nvpair_value_uint32(nvp, &i32);
+			c = fm_printf(d + 1, c, cols, "%x", i32);
+			break;
+
+		case DATA_TYPE_INT64:
+			(void) nvpair_value_int64(nvp, (void *)&i64);
+			c = fm_printf(d + 1, c, cols, "%llx",
+			    (u_longlong_t)i64);
+			break;
+
+		case DATA_TYPE_UINT64:
+			(void) nvpair_value_uint64(nvp, &i64);
+			c = fm_printf(d + 1, c, cols, "%llx",
+			    (u_longlong_t)i64);
+			break;
+
+		case DATA_TYPE_HRTIME:
+			(void) nvpair_value_hrtime(nvp, (void *)&i64);
+			c = fm_printf(d + 1, c, cols, "%llx",
+			    (u_longlong_t)i64);
+			break;
+
+		case DATA_TYPE_STRING:
+			(void) nvpair_value_string(nvp, &str);
+			c = fm_printf(d + 1, c, cols, "\"%s\"",
+			    str ? str : "<NULL>");
+			break;
+
+		case DATA_TYPE_NVLIST:
+			c = fm_printf(d + 1, c, cols, "[");
+			(void) nvpair_value_nvlist(nvp, &cnv);
+			c = fm_nvprintr(cnv, d + 1, c, cols);
+			c = fm_printf(d + 1, c, cols, " ]");
+			break;
+
+		case DATA_TYPE_NVLIST_ARRAY: {
+			nvlist_t **val;
+			uint_t i, nelem;
+
+			c = fm_printf(d + 1, c, cols, "[");
+			(void) nvpair_value_nvlist_array(nvp, &val, &nelem);
+			for (i = 0; i < nelem; i++) {
+				c = fm_nvprintr(val[i], d + 1, c, cols);
+			}
+			c = fm_printf(d + 1, c, cols, " ]");
+			}
+			break;
+
+		case DATA_TYPE_BOOLEAN_ARRAY:
+		case DATA_TYPE_BYTE_ARRAY:
+		case DATA_TYPE_INT8_ARRAY:
+		case DATA_TYPE_UINT8_ARRAY:
+		case DATA_TYPE_INT16_ARRAY:
+		case DATA_TYPE_UINT16_ARRAY:
+		case DATA_TYPE_INT32_ARRAY:
+		case DATA_TYPE_UINT32_ARRAY:
+		case DATA_TYPE_INT64_ARRAY:
+		case DATA_TYPE_UINT64_ARRAY:
+		case DATA_TYPE_STRING_ARRAY:
+			c = fm_printf(d + 1, c, cols, "[...]");
+			break;
+		case DATA_TYPE_UNKNOWN:
+			c = fm_printf(d + 1, c, cols, "<unknown>");
+			break;
+		}
+	}
+
+	return (c);
+}
+
+void
+fm_nvprint(nvlist_t *nvl)
+{
+	char *class;
+	int c = 0;
+
+	console_printf("\r");
+
+	if (nvlist_lookup_string(nvl, FM_CLASS, &class) == 0)
+		c = fm_printf(0, c, ereport_cols, "%s", class);
+
+	if (fm_nvprintr(nvl, 0, c, ereport_cols) != 0)
+		console_printf("\n");
+
+	console_printf("\n");
+}
+
+/*
+ * Wrapper for panic() that first produces an FMA-style message for admins.
+ * Normally such messages are generated by fmd(1M)'s syslog-msgs agent: this
+ * is the one exception to that rule and the only error that gets messaged.
+ * This function is intended for use by subsystems that have detected a fatal
+ * error and enqueued appropriate ereports and wish to then force a panic.
+ */
+/*PRINTFLIKE1*/
+void
+fm_panic(const char *format, ...)
+{
+	va_list ap;
+
+	(void) casptr((void *)&fm_panicstr, NULL, (void *)format);
+#if defined(__i386) || defined(__amd64)
+	fastreboot_disable_highpil();
+#endif /* __i386 || __amd64 */
+	va_start(ap, format);
+	vpanic(format, ap);
+	va_end(ap);
+}
+
+/*
+ * Simply tell the caller if fm_panicstr is set, ie. an fma event has
+ * caused the panic. If so, something other than the default panic
+ * diagnosis method will diagnose the cause of the panic.
+ */
+int
+is_fm_panic()
+{
+	if (fm_panicstr)
+		return (1);
+	else
+		return (0);
+}
+
+/*
+ * Print any appropriate FMA banner message before the panic message.  This
+ * function is called by panicsys() and prints the message for fm_panic().
+ * We print the message here so that it comes after the system is quiesced.
+ * A one-line summary is recorded in the log only (cmn_err(9F) with "!" prefix).
+ * The rest of the message is for the console only and not needed in the log,
+ * so it is printed using console_printf().  We break it up into multiple
+ * chunks so as to avoid overflowing any small legacy prom_printf() buffers.
+ */
+void
+fm_banner(void)
+{
+	timespec_t tod;
+	hrtime_t now;
+
+	if (!fm_panicstr)
+		return; /* panic was not initiated by fm_panic(); do nothing */
+
+	if (panicstr) {
+		tod = panic_hrestime;
+		now = panic_hrtime;
+	} else {
+		gethrestime(&tod);
+		now = gethrtime_waitfree();
+	}
+
+	cmn_err(CE_NOTE, "!SUNW-MSG-ID: %s, "
+	    "TYPE: Error, VER: 1, SEVERITY: Major\n", fm_msgid);
+
+	console_printf(
+"\n\rSUNW-MSG-ID: %s, TYPE: Error, VER: 1, SEVERITY: Major\n"
+"EVENT-TIME: 0x%lx.0x%lx (0x%llx)\n",
+	    fm_msgid, tod.tv_sec, tod.tv_nsec, (u_longlong_t)now);
+
+	console_printf(
+"PLATFORM: %s, CSN: -, HOSTNAME: %s\n"
+"SOURCE: %s, REV: %s %s\n",
+	    platform, utsname.nodename, utsname.sysname,
+	    utsname.release, utsname.version);
+
+	console_printf(
+"DESC: Errors have been detected that require a reboot to ensure system\n"
+"integrity.  See %s/%s for more information.\n",
+	    fm_url, fm_msgid);
+
+	console_printf(
+"AUTO-RESPONSE: Solaris will attempt to save and diagnose the error telemetry\n"
+"IMPACT: The system will sync files, save a crash dump if needed, and reboot\n"
+"REC-ACTION: Save the error summary below in case telemetry cannot be saved\n");
+
+	console_printf("\n");
+}
+
+/*
+ * Utility function to write all of the pending ereports to the dump device.
+ * This function is called at either normal reboot or panic time, and simply
+ * iterates over the in-transit messages in the ereport sysevent channel.
+ */
+void
+fm_ereport_dump(void)
+{
+	evchanq_t *chq;
+	sysevent_t *sep;
+	erpt_dump_t ed;
+
+	timespec_t tod;
+	hrtime_t now;
+	char *buf;
+	size_t len;
+
+	if (panicstr) {
+		tod = panic_hrestime;
+		now = panic_hrtime;
+	} else {
+		if (ereport_errorq != NULL)
+			errorq_drain(ereport_errorq);
+		gethrestime(&tod);
+		now = gethrtime_waitfree();
+	}
+
+	/*
+	 * In the panic case, sysevent_evc_walk_init() will return NULL.
+	 */
+	if ((chq = sysevent_evc_walk_init(ereport_chan, NULL)) == NULL &&
+	    !panicstr)
+		return; /* event channel isn't initialized yet */
+
+	while ((sep = sysevent_evc_walk_step(chq)) != NULL) {
+		if ((buf = sysevent_evc_event_attr(sep, &len)) == NULL)
+			break;
+
+		ed.ed_magic = ERPT_MAGIC;
+		ed.ed_chksum = checksum32(buf, len);
+		ed.ed_size = (uint32_t)len;
+		ed.ed_pad = 0;
+		ed.ed_hrt_nsec = SE_TIME(sep);
+		ed.ed_hrt_base = now;
+		ed.ed_tod_base.sec = tod.tv_sec;
+		ed.ed_tod_base.nsec = tod.tv_nsec;
+
+		dumpvp_write(&ed, sizeof (ed));
+		dumpvp_write(buf, len);
+	}
+
+	sysevent_evc_walk_fini(chq);
+}
+
+/*
+ * Post an error report (ereport) to the sysevent error channel.  The error
+ * channel must be established with a prior call to sysevent_evc_create()
+ * before publication may occur.
+ */
+void
+fm_ereport_post(nvlist_t *ereport, int evc_flag)
+{
+	size_t nvl_size = 0;
+	evchan_t *error_chan;
+
+	(void) nvlist_size(ereport, &nvl_size, NV_ENCODE_NATIVE);
+	if (nvl_size > ERPT_DATA_SZ || nvl_size == 0) {
+		atomic_add_64(&erpt_kstat_data.erpt_dropped.value.ui64, 1);
+		return;
+	}
+
+	if (sysevent_evc_bind(FM_ERROR_CHAN, &error_chan,
+	    EVCH_CREAT|EVCH_HOLD_PEND) != 0) {
+		atomic_add_64(&erpt_kstat_data.erpt_dropped.value.ui64, 1);
+		return;
+	}
+
+	if (sysevent_evc_publish(error_chan, EC_FM, ESC_FM_ERROR,
+	    SUNW_VENDOR, FM_PUB, ereport, evc_flag) != 0) {
+		atomic_add_64(&erpt_kstat_data.erpt_dropped.value.ui64, 1);
+		(void) sysevent_evc_unbind(error_chan);
+		return;
+	}
+	(void) sysevent_evc_unbind(error_chan);
+}
+
+/*
+ * Wrapppers for FM nvlist allocators
+ */
+/* ARGSUSED */
+static void *
+i_fm_alloc(nv_alloc_t *nva, size_t size)
+{
+	return (kmem_zalloc(size, KM_SLEEP));
+}
+
+/* ARGSUSED */
+static void
+i_fm_free(nv_alloc_t *nva, void *buf, size_t size)
+{
+	kmem_free(buf, size);
+}
+
+const nv_alloc_ops_t fm_mem_alloc_ops = {
+	NULL,
+	NULL,
+	i_fm_alloc,
+	i_fm_free,
+	NULL
+};
+
+/*
+ * Create and initialize a new nv_alloc_t for a fixed buffer, buf.  A pointer
+ * to the newly allocated nv_alloc_t structure is returned upon success or NULL
+ * is returned to indicate that the nv_alloc structure could not be created.
+ */
+nv_alloc_t *
+fm_nva_xcreate(char *buf, size_t bufsz)
+{
+	nv_alloc_t *nvhdl = kmem_zalloc(sizeof (nv_alloc_t), KM_SLEEP);
+
+	if (bufsz == 0 || nv_alloc_init(nvhdl, nv_fixed_ops, buf, bufsz) != 0) {
+		kmem_free(nvhdl, sizeof (nv_alloc_t));
+		return (NULL);
+	}
+
+	return (nvhdl);
+}
+
+/*
+ * Destroy a previously allocated nv_alloc structure.  The fixed buffer
+ * associated with nva must be freed by the caller.
+ */
+void
+fm_nva_xdestroy(nv_alloc_t *nva)
+{
+	nv_alloc_fini(nva);
+	kmem_free(nva, sizeof (nv_alloc_t));
+}
+
+/*
+ * Create a new nv list.  A pointer to a new nv list structure is returned
+ * upon success or NULL is returned to indicate that the structure could
+ * not be created.  The newly created nv list is created and managed by the
+ * operations installed in nva.   If nva is NULL, the default FMA nva
+ * operations are installed and used.
+ *
+ * When called from the kernel and nva == NULL, this function must be called
+ * from passive kernel context with no locks held that can prevent a
+ * sleeping memory allocation from occurring.  Otherwise, this function may
+ * be called from other kernel contexts as long a valid nva created via
+ * fm_nva_create() is supplied.
+ */
+nvlist_t *
+fm_nvlist_create(nv_alloc_t *nva)
+{
+	int hdl_alloced = 0;
+	nvlist_t *nvl;
+	nv_alloc_t *nvhdl;
+
+	if (nva == NULL) {
+		nvhdl = kmem_zalloc(sizeof (nv_alloc_t), KM_SLEEP);
+
+		if (nv_alloc_init(nvhdl, &fm_mem_alloc_ops, NULL, 0) != 0) {
+			kmem_free(nvhdl, sizeof (nv_alloc_t));
+			return (NULL);
+		}
+		hdl_alloced = 1;
+	} else {
+		nvhdl = nva;
+	}
+
+	if (nvlist_xalloc(&nvl, NV_UNIQUE_NAME, nvhdl) != 0) {
+		if (hdl_alloced) {
+			nv_alloc_fini(nvhdl);
+			kmem_free(nvhdl, sizeof (nv_alloc_t));
+		}
+		return (NULL);
+	}
+
+	return (nvl);
+}
+
+/*
+ * Destroy a previously allocated nvlist structure.  flag indicates whether
+ * or not the associated nva structure should be freed (FM_NVA_FREE) or
+ * retained (FM_NVA_RETAIN).  Retaining the nv alloc structure allows
+ * it to be re-used for future nvlist creation operations.
+ */
+void
+fm_nvlist_destroy(nvlist_t *nvl, int flag)
+{
+	nv_alloc_t *nva = nvlist_lookup_nv_alloc(nvl);
+
+	nvlist_free(nvl);
+
+	if (nva != NULL) {
+		if (flag == FM_NVA_FREE)
+			fm_nva_xdestroy(nva);
+	}
+}
+
+int
+i_fm_payload_set(nvlist_t *payload, const char *name, va_list ap)
+{
+	int nelem, ret = 0;
+	data_type_t type;
+
+	while (ret == 0 && name != NULL) {
+		type = va_arg(ap, data_type_t);
+		switch (type) {
+		case DATA_TYPE_BYTE:
+			ret = nvlist_add_byte(payload, name,
+			    va_arg(ap, uint_t));
+			break;
+		case DATA_TYPE_BYTE_ARRAY:
+			nelem = va_arg(ap, int);
+			ret = nvlist_add_byte_array(payload, name,
+			    va_arg(ap, uchar_t *), nelem);
+			break;
+		case DATA_TYPE_BOOLEAN_VALUE:
+			ret = nvlist_add_boolean_value(payload, name,
+			    va_arg(ap, boolean_t));
+			break;
+		case DATA_TYPE_BOOLEAN_ARRAY:
+			nelem = va_arg(ap, int);
+			ret = nvlist_add_boolean_array(payload, name,
+			    va_arg(ap, boolean_t *), nelem);
+			break;
+		case DATA_TYPE_INT8:
+			ret = nvlist_add_int8(payload, name,
+			    va_arg(ap, int));
+			break;
+		case DATA_TYPE_INT8_ARRAY:
+			nelem = va_arg(ap, int);
+			ret = nvlist_add_int8_array(payload, name,
+			    va_arg(ap, int8_t *), nelem);
+			break;
+		case DATA_TYPE_UINT8:
+			ret = nvlist_add_uint8(payload, name,
+			    va_arg(ap, uint_t));
+			break;
+		case DATA_TYPE_UINT8_ARRAY:
+			nelem = va_arg(ap, int);
+			ret = nvlist_add_uint8_array(payload, name,
+			    va_arg(ap, uint8_t *), nelem);
+			break;
+		case DATA_TYPE_INT16:
+			ret = nvlist_add_int16(payload, name,
+			    va_arg(ap, int));
+			break;
+		case DATA_TYPE_INT16_ARRAY:
+			nelem = va_arg(ap, int);
+			ret = nvlist_add_int16_array(payload, name,
+			    va_arg(ap, int16_t *), nelem);
+			break;
+		case DATA_TYPE_UINT16:
+			ret = nvlist_add_uint16(payload, name,
+			    va_arg(ap, uint_t));
+			break;
+		case DATA_TYPE_UINT16_ARRAY:
+			nelem = va_arg(ap, int);
+			ret = nvlist_add_uint16_array(payload, name,
+			    va_arg(ap, uint16_t *), nelem);
+			break;
+		case DATA_TYPE_INT32:
+			ret = nvlist_add_int32(payload, name,
+			    va_arg(ap, int32_t));
+			break;
+		case DATA_TYPE_INT32_ARRAY:
+			nelem = va_arg(ap, int);
+			ret = nvlist_add_int32_array(payload, name,
+			    va_arg(ap, int32_t *), nelem);
+			break;
+		case DATA_TYPE_UINT32:
+			ret = nvlist_add_uint32(payload, name,
+			    va_arg(ap, uint32_t));
+			break;
+		case DATA_TYPE_UINT32_ARRAY:
+			nelem = va_arg(ap, int);
+			ret = nvlist_add_uint32_array(payload, name,
+			    va_arg(ap, uint32_t *), nelem);
+			break;
+		case DATA_TYPE_INT64:
+			ret = nvlist_add_int64(payload, name,
+			    va_arg(ap, int64_t));
+			break;
+		case DATA_TYPE_INT64_ARRAY:
+			nelem = va_arg(ap, int);
+			ret = nvlist_add_int64_array(payload, name,
+			    va_arg(ap, int64_t *), nelem);
+			break;
+		case DATA_TYPE_UINT64:
+			ret = nvlist_add_uint64(payload, name,
+			    va_arg(ap, uint64_t));
+			break;
+		case DATA_TYPE_UINT64_ARRAY:
+			nelem = va_arg(ap, int);
+			ret = nvlist_add_uint64_array(payload, name,
+			    va_arg(ap, uint64_t *), nelem);
+			break;
+		case DATA_TYPE_STRING:
+			ret = nvlist_add_string(payload, name,
+			    va_arg(ap, char *));
+			break;
+		case DATA_TYPE_STRING_ARRAY:
+			nelem = va_arg(ap, int);
+			ret = nvlist_add_string_array(payload, name,
+			    va_arg(ap, char **), nelem);
+			break;
+		case DATA_TYPE_NVLIST:
+			ret = nvlist_add_nvlist(payload, name,
+			    va_arg(ap, nvlist_t *));
+			break;
+		case DATA_TYPE_NVLIST_ARRAY:
+			nelem = va_arg(ap, int);
+			ret = nvlist_add_nvlist_array(payload, name,
+			    va_arg(ap, nvlist_t **), nelem);
+			break;
+		default:
+			ret = EINVAL;
+		}
+
+		name = va_arg(ap, char *);
+	}
+	return (ret);
+}
+
+void
+fm_payload_set(nvlist_t *payload, ...)
+{
+	int ret;
+	const char *name;
+	va_list ap;
+
+	va_start(ap, payload);
+	name = va_arg(ap, char *);
+	ret = i_fm_payload_set(payload, name, ap);
+	va_end(ap);
+
+	if (ret)
+		atomic_add_64(
+		    &erpt_kstat_data.payload_set_failed.value.ui64, 1);
+}
+
+/*
+ * Set-up and validate the members of an ereport event according to:
+ *
+ *	Member name		Type		Value
+ *	====================================================
+ *	class			string		ereport
+ *	version			uint8_t		0
+ *	ena			uint64_t	<ena>
+ *	detector		nvlist_t	<detector>
+ *	ereport-payload		nvlist_t	<var args>
+ *
+ * We don't actually add a 'version' member to the payload.  Really,
+ * the version quoted to us by our caller is that of the category 1
+ * "ereport" event class (and we require FM_EREPORT_VERS0) but
+ * the payload version of the actual leaf class event under construction
+ * may be something else.  Callers should supply a version in the varargs,
+ * or (better) we could take two version arguments - one for the
+ * ereport category 1 classification (expect FM_EREPORT_VERS0) and one
+ * for the leaf class.
+ */
+void
+fm_ereport_set(nvlist_t *ereport, int version, const char *erpt_class,
+    uint64_t ena, const nvlist_t *detector, ...)
+{
+	char ereport_class[FM_MAX_CLASS];
+	const char *name;
+	va_list ap;
+	int ret;
+
+	if (version != FM_EREPORT_VERS0) {
+		atomic_add_64(&erpt_kstat_data.erpt_set_failed.value.ui64, 1);
+		return;
+	}
+
+	(void) snprintf(ereport_class, FM_MAX_CLASS, "%s.%s",
+	    FM_EREPORT_CLASS, erpt_class);
+	if (nvlist_add_string(ereport, FM_CLASS, ereport_class) != 0) {
+		atomic_add_64(&erpt_kstat_data.erpt_set_failed.value.ui64, 1);
+		return;
+	}
+
+	if (nvlist_add_uint64(ereport, FM_EREPORT_ENA, ena)) {
+		atomic_add_64(&erpt_kstat_data.erpt_set_failed.value.ui64, 1);
+	}
+
+	if (nvlist_add_nvlist(ereport, FM_EREPORT_DETECTOR,
+	    (nvlist_t *)detector) != 0) {
+		atomic_add_64(&erpt_kstat_data.erpt_set_failed.value.ui64, 1);
+	}
+
+	va_start(ap, detector);
+	name = va_arg(ap, const char *);
+	ret = i_fm_payload_set(ereport, name, ap);
+	va_end(ap);
+
+	if (ret)
+		atomic_add_64(&erpt_kstat_data.erpt_set_failed.value.ui64, 1);
+}
+
+/*
+ * Set-up and validate the members of an hc fmri according to;
+ *
+ *	Member name		Type		Value
+ *	===================================================
+ *	version			uint8_t		0
+ *	auth			nvlist_t	<auth>
+ *	hc-name			string		<name>
+ *	hc-id			string		<id>
+ *
+ * Note that auth and hc-id are optional members.
+ */
+
+#define	HC_MAXPAIRS	20
+#define	HC_MAXNAMELEN	50
+
+static int
+fm_fmri_hc_set_common(nvlist_t *fmri, int version, const nvlist_t *auth)
+{
+	if (version != FM_HC_SCHEME_VERSION) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return (0);
+	}
+
+	if (nvlist_add_uint8(fmri, FM_VERSION, version) != 0 ||
+	    nvlist_add_string(fmri, FM_FMRI_SCHEME, FM_FMRI_SCHEME_HC) != 0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return (0);
+	}
+
+	if (auth != NULL && nvlist_add_nvlist(fmri, FM_FMRI_AUTHORITY,
+	    (nvlist_t *)auth) != 0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return (0);
+	}
+
+	return (1);
+}
+
+void
+fm_fmri_hc_set(nvlist_t *fmri, int version, const nvlist_t *auth,
+    nvlist_t *snvl, int npairs, ...)
+{
+	nv_alloc_t *nva = nvlist_lookup_nv_alloc(fmri);
+	nvlist_t *pairs[HC_MAXPAIRS];
+	va_list ap;
+	int i;
+
+	if (!fm_fmri_hc_set_common(fmri, version, auth))
+		return;
+
+	npairs = MIN(npairs, HC_MAXPAIRS);
+
+	va_start(ap, npairs);
+	for (i = 0; i < npairs; i++) {
+		const char *name = va_arg(ap, const char *);
+		uint32_t id = va_arg(ap, uint32_t);
+		char idstr[11];
+
+		(void) snprintf(idstr, sizeof (idstr), "%u", id);
+
+		pairs[i] = fm_nvlist_create(nva);
+		if (nvlist_add_string(pairs[i], FM_FMRI_HC_NAME, name) != 0 ||
+		    nvlist_add_string(pairs[i], FM_FMRI_HC_ID, idstr) != 0) {
+			atomic_add_64(
+			    &erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		}
+	}
+	va_end(ap);
+
+	if (nvlist_add_nvlist_array(fmri, FM_FMRI_HC_LIST, pairs, npairs) != 0)
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+
+	for (i = 0; i < npairs; i++)
+		fm_nvlist_destroy(pairs[i], FM_NVA_RETAIN);
+
+	if (snvl != NULL) {
+		if (nvlist_add_nvlist(fmri, FM_FMRI_HC_SPECIFIC, snvl) != 0) {
+			atomic_add_64(
+			    &erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		}
+	}
+}
+
+/*
+ * Set-up and validate the members of an dev fmri according to:
+ *
+ *	Member name		Type		Value
+ *	====================================================
+ *	version			uint8_t		0
+ *	auth			nvlist_t	<auth>
+ *	devpath			string		<devpath>
+ *	[devid]			string		<devid>
+ *	[target-port-l0id]	string		<target-port-lun0-id>
+ *
+ * Note that auth and devid are optional members.
+ */
+void
+fm_fmri_dev_set(nvlist_t *fmri_dev, int version, const nvlist_t *auth,
+    const char *devpath, const char *devid, const char *tpl0)
+{
+	int err = 0;
+
+	if (version != DEV_SCHEME_VERSION0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return;
+	}
+
+	err |= nvlist_add_uint8(fmri_dev, FM_VERSION, version);
+	err |= nvlist_add_string(fmri_dev, FM_FMRI_SCHEME, FM_FMRI_SCHEME_DEV);
+
+	if (auth != NULL) {
+		err |= nvlist_add_nvlist(fmri_dev, FM_FMRI_AUTHORITY,
+		    (nvlist_t *)auth);
+	}
+
+	err |= nvlist_add_string(fmri_dev, FM_FMRI_DEV_PATH, devpath);
+
+	if (devid != NULL)
+		err |= nvlist_add_string(fmri_dev, FM_FMRI_DEV_ID, devid);
+
+	if (tpl0 != NULL)
+		err |= nvlist_add_string(fmri_dev, FM_FMRI_DEV_TGTPTLUN0, tpl0);
+
+	if (err)
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+
+}
+
+/*
+ * Set-up and validate the members of an cpu fmri according to:
+ *
+ *	Member name		Type		Value
+ *	====================================================
+ *	version			uint8_t		0
+ *	auth			nvlist_t	<auth>
+ *	cpuid			uint32_t	<cpu_id>
+ *	cpumask			uint8_t		<cpu_mask>
+ *	serial			uint64_t	<serial_id>
+ *
+ * Note that auth, cpumask, serial are optional members.
+ *
+ */
+void
+fm_fmri_cpu_set(nvlist_t *fmri_cpu, int version, const nvlist_t *auth,
+    uint32_t cpu_id, uint8_t *cpu_maskp, const char *serial_idp)
+{
+	uint64_t *failedp = &erpt_kstat_data.fmri_set_failed.value.ui64;
+
+	if (version < CPU_SCHEME_VERSION1) {
+		atomic_add_64(failedp, 1);
+		return;
+	}
+
+	if (nvlist_add_uint8(fmri_cpu, FM_VERSION, version) != 0) {
+		atomic_add_64(failedp, 1);
+		return;
+	}
+
+	if (nvlist_add_string(fmri_cpu, FM_FMRI_SCHEME,
+	    FM_FMRI_SCHEME_CPU) != 0) {
+		atomic_add_64(failedp, 1);
+		return;
+	}
+
+	if (auth != NULL && nvlist_add_nvlist(fmri_cpu, FM_FMRI_AUTHORITY,
+	    (nvlist_t *)auth) != 0)
+		atomic_add_64(failedp, 1);
+
+	if (nvlist_add_uint32(fmri_cpu, FM_FMRI_CPU_ID, cpu_id) != 0)
+		atomic_add_64(failedp, 1);
+
+	if (cpu_maskp != NULL && nvlist_add_uint8(fmri_cpu, FM_FMRI_CPU_MASK,
+	    *cpu_maskp) != 0)
+		atomic_add_64(failedp, 1);
+
+	if (serial_idp == NULL || nvlist_add_string(fmri_cpu,
+	    FM_FMRI_CPU_SERIAL_ID, (char *)serial_idp) != 0)
+			atomic_add_64(failedp, 1);
+}
+
+/*
+ * Set-up and validate the members of a mem according to:
+ *
+ *	Member name		Type		Value
+ *	====================================================
+ *	version			uint8_t		0
+ *	auth			nvlist_t	<auth>		[optional]
+ *	unum			string		<unum>
+ *	serial			string		<serial>	[optional*]
+ *	offset			uint64_t	<offset>	[optional]
+ *
+ *	* serial is required if offset is present
+ */
+void
+fm_fmri_mem_set(nvlist_t *fmri, int version, const nvlist_t *auth,
+    const char *unum, const char *serial, uint64_t offset)
+{
+	if (version != MEM_SCHEME_VERSION0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return;
+	}
+
+	if (!serial && (offset != (uint64_t)-1)) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return;
+	}
+
+	if (nvlist_add_uint8(fmri, FM_VERSION, version) != 0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return;
+	}
+
+	if (nvlist_add_string(fmri, FM_FMRI_SCHEME, FM_FMRI_SCHEME_MEM) != 0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return;
+	}
+
+	if (auth != NULL) {
+		if (nvlist_add_nvlist(fmri, FM_FMRI_AUTHORITY,
+		    (nvlist_t *)auth) != 0) {
+			atomic_add_64(
+			    &erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		}
+	}
+
+	if (nvlist_add_string(fmri, FM_FMRI_MEM_UNUM, unum) != 0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+	}
+
+	if (serial != NULL) {
+		if (nvlist_add_string_array(fmri, FM_FMRI_MEM_SERIAL_ID,
+		    (char **)&serial, 1) != 0) {
+			atomic_add_64(
+			    &erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		}
+		if (offset != (uint64_t)-1) {
+			if (nvlist_add_uint64(fmri, FM_FMRI_MEM_OFFSET,
+			    offset) != 0) {
+				atomic_add_64(&erpt_kstat_data.
+				    fmri_set_failed.value.ui64, 1);
+			}
+		}
+	}
+}
+
+void
+fm_fmri_zfs_set(nvlist_t *fmri, int version, uint64_t pool_guid,
+    uint64_t vdev_guid)
+{
+	if (version != ZFS_SCHEME_VERSION0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return;
+	}
+
+	if (nvlist_add_uint8(fmri, FM_VERSION, version) != 0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return;
+	}
+
+	if (nvlist_add_string(fmri, FM_FMRI_SCHEME, FM_FMRI_SCHEME_ZFS) != 0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return;
+	}
+
+	if (nvlist_add_uint64(fmri, FM_FMRI_ZFS_POOL, pool_guid) != 0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+	}
+
+	if (vdev_guid != 0) {
+		if (nvlist_add_uint64(fmri, FM_FMRI_ZFS_VDEV, vdev_guid) != 0) {
+			atomic_add_64(
+			    &erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		}
+	}
+}
+
+uint64_t
+fm_ena_increment(uint64_t ena)
+{
+	uint64_t new_ena;
+
+	switch (ENA_FORMAT(ena)) {
+	case FM_ENA_FMT1:
+		new_ena = ena + (1 << ENA_FMT1_GEN_SHFT);
+		break;
+	case FM_ENA_FMT2:
+		new_ena = ena + (1 << ENA_FMT2_GEN_SHFT);
+		break;
+	default:
+		new_ena = 0;
+	}
+
+	return (new_ena);
+}
+
+uint64_t
+fm_ena_generate_cpu(uint64_t timestamp, processorid_t cpuid, uchar_t format)
+{
+	uint64_t ena = 0;
+
+	switch (format) {
+	case FM_ENA_FMT1:
+		if (timestamp) {
+			ena = (uint64_t)((format & ENA_FORMAT_MASK) |
+			    ((cpuid << ENA_FMT1_CPUID_SHFT) &
+			    ENA_FMT1_CPUID_MASK) |
+			    ((timestamp << ENA_FMT1_TIME_SHFT) &
+			    ENA_FMT1_TIME_MASK));
+		} else {
+			ena = (uint64_t)((format & ENA_FORMAT_MASK) |
+			    ((cpuid << ENA_FMT1_CPUID_SHFT) &
+			    ENA_FMT1_CPUID_MASK) |
+			    ((gethrtime_waitfree() << ENA_FMT1_TIME_SHFT) &
+			    ENA_FMT1_TIME_MASK));
+		}
+		break;
+	case FM_ENA_FMT2:
+		ena = (uint64_t)((format & ENA_FORMAT_MASK) |
+		    ((timestamp << ENA_FMT2_TIME_SHFT) & ENA_FMT2_TIME_MASK));
+		break;
+	default:
+		break;
+	}
+
+	return (ena);
+}
+
+uint64_t
+fm_ena_generate(uint64_t timestamp, uchar_t format)
+{
+	return (fm_ena_generate_cpu(timestamp, CPU->cpu_id, format));
+}
+
+uint64_t
+fm_ena_generation_get(uint64_t ena)
+{
+	uint64_t gen;
+
+	switch (ENA_FORMAT(ena)) {
+	case FM_ENA_FMT1:
+		gen = (ena & ENA_FMT1_GEN_MASK) >> ENA_FMT1_GEN_SHFT;
+		break;
+	case FM_ENA_FMT2:
+		gen = (ena & ENA_FMT2_GEN_MASK) >> ENA_FMT2_GEN_SHFT;
+		break;
+	default:
+		gen = 0;
+		break;
+	}
+
+	return (gen);
+}
+
+uchar_t
+fm_ena_format_get(uint64_t ena)
+{
+
+	return (ENA_FORMAT(ena));
+}
+
+uint64_t
+fm_ena_id_get(uint64_t ena)
+{
+	uint64_t id;
+
+	switch (ENA_FORMAT(ena)) {
+	case FM_ENA_FMT1:
+		id = (ena & ENA_FMT1_ID_MASK) >> ENA_FMT1_ID_SHFT;
+		break;
+	case FM_ENA_FMT2:
+		id = (ena & ENA_FMT2_ID_MASK) >> ENA_FMT2_ID_SHFT;
+		break;
+	default:
+		id = 0;
+	}
+
+	return (id);
+}
+
+uint64_t
+fm_ena_time_get(uint64_t ena)
+{
+	uint64_t time;
+
+	switch (ENA_FORMAT(ena)) {
+	case FM_ENA_FMT1:
+		time = (ena & ENA_FMT1_TIME_MASK) >> ENA_FMT1_TIME_SHFT;
+		break;
+	case FM_ENA_FMT2:
+		time = (ena & ENA_FMT2_TIME_MASK) >> ENA_FMT2_TIME_SHFT;
+		break;
+	default:
+		time = 0;
+	}
+
+	return (time);
+}
+
+/*
+ * Convert a getpcstack() trace to symbolic name+offset, and add the resulting
+ * string array to a Fault Management ereport as FM_EREPORT_PAYLOAD_NAME_STACK.
+ */
+void
+fm_payload_stack_add(nvlist_t *payload, const pc_t *stack, int depth)
+{
+	int i;
+	char *sym;
+	ulong_t off;
+	char *stkpp[FM_STK_DEPTH];
+	char buf[FM_STK_DEPTH * FM_SYM_SZ];
+	char *stkp = buf;
+
+	for (i = 0; i < depth && i != FM_STK_DEPTH; i++, stkp += FM_SYM_SZ) {
+		if ((sym = kobj_getsymname(stack[i], &off)) != NULL)
+			(void) snprintf(stkp, FM_SYM_SZ, "%s+%lx", sym, off);
+		else
+			(void) snprintf(stkp, FM_SYM_SZ, "%lx", (long)stack[i]);
+		stkpp[i] = stkp;
+	}
+
+	fm_payload_set(payload, FM_EREPORT_PAYLOAD_NAME_STACK,
+	    DATA_TYPE_STRING_ARRAY, depth, stkpp, NULL);
+}
+
+void
+print_msg_hwerr(ctid_t ct_id, proc_t *p)
+{
+	uprintf("Killed process %d (%s) in contract id %d "
+	    "due to hardware error\n", p->p_pid, p->p_user.u_comm, ct_id);
+}
+
+void
+fm_fmri_hc_create(nvlist_t *fmri, int version, const nvlist_t *auth,
+    nvlist_t *snvl, nvlist_t *bboard, int npairs, ...)
+{
+	nv_alloc_t *nva = nvlist_lookup_nv_alloc(fmri);
+	nvlist_t *pairs[HC_MAXPAIRS];
+	nvlist_t **hcl;
+	uint_t n;
+	int i, j;
+	va_list ap;
+	char *hcname, *hcid;
+
+	if (!fm_fmri_hc_set_common(fmri, version, auth))
+		return;
+
+	/*
+	 * copy the bboard nvpairs to the pairs array
+	 */
+	if (nvlist_lookup_nvlist_array(bboard, FM_FMRI_HC_LIST, &hcl, &n)
+	    != 0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return;
+	}
+
+	for (i = 0; i < n; i++) {
+		if (nvlist_lookup_string(hcl[i], FM_FMRI_HC_NAME,
+		    &hcname) != 0) {
+			atomic_add_64(
+			    &erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+			return;
+		}
+		if (nvlist_lookup_string(hcl[i], FM_FMRI_HC_ID, &hcid) != 0) {
+			atomic_add_64(
+			    &erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+			return;
+		}
+
+		pairs[i] = fm_nvlist_create(nva);
+		if (nvlist_add_string(pairs[i], FM_FMRI_HC_NAME, hcname) != 0 ||
+		    nvlist_add_string(pairs[i], FM_FMRI_HC_ID, hcid) != 0) {
+			for (j = 0; j <= i; j++) {
+				if (pairs[j] != NULL)
+					fm_nvlist_destroy(pairs[j],
+					    FM_NVA_RETAIN);
+			}
+			atomic_add_64(
+			    &erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+			return;
+		}
+	}
+
+	/*
+	 * create the pairs from passed in pairs
+	 */
+	npairs = MIN(npairs, HC_MAXPAIRS);
+
+	va_start(ap, npairs);
+	for (i = n; i < npairs + n; i++) {
+		const char *name = va_arg(ap, const char *);
+		uint32_t id = va_arg(ap, uint32_t);
+		char idstr[11];
+		(void) snprintf(idstr, sizeof (idstr), "%u", id);
+		pairs[i] = fm_nvlist_create(nva);
+		if (nvlist_add_string(pairs[i], FM_FMRI_HC_NAME, name) != 0 ||
+		    nvlist_add_string(pairs[i], FM_FMRI_HC_ID, idstr) != 0) {
+			for (j = 0; j <= i; j++) {
+				if (pairs[j] != NULL)
+					fm_nvlist_destroy(pairs[j],
+					    FM_NVA_RETAIN);
+			}
+			atomic_add_64(
+			    &erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+			return;
+		}
+	}
+	va_end(ap);
+
+	/*
+	 * Create the fmri hc list
+	 */
+	if (nvlist_add_nvlist_array(fmri, FM_FMRI_HC_LIST, pairs,
+	    npairs + n) != 0) {
+		atomic_add_64(&erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+		return;
+	}
+
+	for (i = 0; i < npairs + n; i++) {
+			fm_nvlist_destroy(pairs[i], FM_NVA_RETAIN);
+	}
+
+	if (snvl != NULL) {
+		if (nvlist_add_nvlist(fmri, FM_FMRI_HC_SPECIFIC, snvl) != 0) {
+			atomic_add_64(
+			    &erpt_kstat_data.fmri_set_failed.value.ui64, 1);
+			return;
+		}
+	}
+}
diff --git a/uts/common/os/nvpair_alloc_system.c b/uts/common/os/nvpair_alloc_system.c
new file mode 100644
index 000000000000..e7655779590b
--- /dev/null
+++ b/uts/common/os/nvpair_alloc_system.c
@@ -0,0 +1,64 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <rpc/types.h>
+#include <sys/nvpair.h>
+
+static void *
+nv_alloc_sys(nv_alloc_t *nva, size_t size)
+{
+	return (kmem_alloc(size, (int)(uintptr_t)nva->nva_arg));
+}
+
+/*ARGSUSED*/
+static void
+nv_free_sys(nv_alloc_t *nva, void *buf, size_t size)
+{
+	kmem_free(buf, size);
+}
+
+static const nv_alloc_ops_t system_ops = {
+	NULL,			/* nv_ao_init() */
+	NULL,			/* nv_ao_fini() */
+	nv_alloc_sys,		/* nv_ao_alloc() */
+	nv_free_sys,		/* nv_ao_free() */
+	NULL			/* nv_ao_reset() */
+};
+
+nv_alloc_t nv_alloc_sleep_def = {
+	&system_ops,
+	(void *)KM_SLEEP
+};
+
+nv_alloc_t nv_alloc_nosleep_def = {
+	&system_ops,
+	(void *)KM_NOSLEEP
+};
+
+nv_alloc_t *nv_alloc_sleep = &nv_alloc_sleep_def;
+nv_alloc_t *nv_alloc_nosleep = &nv_alloc_nosleep_def;
diff --git a/uts/common/sys/acl.h b/uts/common/sys/acl.h
new file mode 100644
index 000000000000..35c9772b8e9b
--- /dev/null
+++ b/uts/common/sys/acl.h
@@ -0,0 +1,302 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_ACL_H
+#define	_SYS_ACL_H
+
+#include <sys/types.h>
+#include <sys/acl_impl.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#define	MAX_ACL_ENTRIES		(1024)	/* max entries of each type */
+typedef struct acl {
+	int		a_type;		/* the type of ACL entry */
+	uid_t		a_id;		/* the entry in -uid or gid */
+	o_mode_t	a_perm;		/* the permission field */
+} aclent_t;
+
+typedef struct ace {
+	uid_t		a_who;		/* uid or gid */
+	uint32_t	a_access_mask;	/* read,write,... */
+	uint16_t	a_flags;	/* see below */
+	uint16_t	a_type;		/* allow or deny */
+} ace_t;
+
+typedef struct acl_info acl_t;
+
+/*
+ * The following are Defined types for an aclent_t.
+ */
+#define	USER_OBJ	(0x01)		/* object owner */
+#define	USER		(0x02)		/* additional users */
+#define	GROUP_OBJ	(0x04)		/* owning group of the object */
+#define	GROUP		(0x08)		/* additional groups */
+#define	CLASS_OBJ	(0x10)		/* file group class and mask entry */
+#define	OTHER_OBJ	(0x20)		/* other entry for the object */
+#define	ACL_DEFAULT	(0x1000)	/* default flag */
+/* default object owner */
+#define	DEF_USER_OBJ	(ACL_DEFAULT | USER_OBJ)
+/* default additional users */
+#define	DEF_USER	(ACL_DEFAULT | USER)
+/* default owning group */
+#define	DEF_GROUP_OBJ	(ACL_DEFAULT | GROUP_OBJ)
+/* default additional groups */
+#define	DEF_GROUP	(ACL_DEFAULT | GROUP)
+/* default mask entry */
+#define	DEF_CLASS_OBJ	(ACL_DEFAULT | CLASS_OBJ)
+/* default other entry */
+#define	DEF_OTHER_OBJ	(ACL_DEFAULT | OTHER_OBJ)
+
+/*
+ * The following are defined for ace_t.
+ */
+#define	ACE_READ_DATA		0x00000001
+#define	ACE_LIST_DIRECTORY	0x00000001
+#define	ACE_WRITE_DATA		0x00000002
+#define	ACE_ADD_FILE		0x00000002
+#define	ACE_APPEND_DATA		0x00000004
+#define	ACE_ADD_SUBDIRECTORY	0x00000004
+#define	ACE_READ_NAMED_ATTRS	0x00000008
+#define	ACE_WRITE_NAMED_ATTRS	0x00000010
+#define	ACE_EXECUTE		0x00000020
+#define	ACE_DELETE_CHILD	0x00000040
+#define	ACE_READ_ATTRIBUTES	0x00000080
+#define	ACE_WRITE_ATTRIBUTES	0x00000100
+#define	ACE_DELETE		0x00010000
+#define	ACE_READ_ACL		0x00020000
+#define	ACE_WRITE_ACL		0x00040000
+#define	ACE_WRITE_OWNER		0x00080000
+#define	ACE_SYNCHRONIZE		0x00100000
+
+#define	ACE_FILE_INHERIT_ACE		0x0001
+#define	ACE_DIRECTORY_INHERIT_ACE	0x0002
+#define	ACE_NO_PROPAGATE_INHERIT_ACE	0x0004
+#define	ACE_INHERIT_ONLY_ACE		0x0008
+#define	ACE_SUCCESSFUL_ACCESS_ACE_FLAG	0x0010
+#define	ACE_FAILED_ACCESS_ACE_FLAG	0x0020
+#define	ACE_IDENTIFIER_GROUP		0x0040
+#define	ACE_INHERITED_ACE		0x0080
+#define	ACE_OWNER			0x1000
+#define	ACE_GROUP			0x2000
+#define	ACE_EVERYONE			0x4000
+
+#define	ACE_ACCESS_ALLOWED_ACE_TYPE	0x0000
+#define	ACE_ACCESS_DENIED_ACE_TYPE	0x0001
+#define	ACE_SYSTEM_AUDIT_ACE_TYPE	0x0002
+#define	ACE_SYSTEM_ALARM_ACE_TYPE	0x0003
+
+#define	ACL_AUTO_INHERIT		0x0001
+#define	ACL_PROTECTED			0x0002
+#define	ACL_DEFAULTED			0x0004
+#define	ACL_FLAGS_ALL			(ACL_AUTO_INHERIT|ACL_PROTECTED| \
+    ACL_DEFAULTED)
+
+#ifdef _KERNEL
+
+/*
+ * These are only applicable in a CIFS context.
+ */
+#define	ACE_ACCESS_ALLOWED_COMPOUND_ACE_TYPE		0x04
+#define	ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE		0x05
+#define	ACE_ACCESS_DENIED_OBJECT_ACE_TYPE		0x06
+#define	ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE		0x07
+#define	ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE		0x08
+#define	ACE_ACCESS_ALLOWED_CALLBACK_ACE_TYPE		0x09
+#define	ACE_ACCESS_DENIED_CALLBACK_ACE_TYPE		0x0A
+#define	ACE_ACCESS_ALLOWED_CALLBACK_OBJECT_ACE_TYPE	0x0B
+#define	ACE_ACCESS_DENIED_CALLBACK_OBJECT_ACE_TYPE	0x0C
+#define	ACE_SYSTEM_AUDIT_CALLBACK_ACE_TYPE		0x0D
+#define	ACE_SYSTEM_ALARM_CALLBACK_ACE_TYPE		0x0E
+#define	ACE_SYSTEM_AUDIT_CALLBACK_OBJECT_ACE_TYPE	0x0F
+#define	ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE	0x10
+
+#define	ACE_ALL_TYPES	0x001F
+
+typedef struct ace_object {
+	uid_t		a_who;		/* uid or gid */
+	uint32_t	a_access_mask;	/* read,write,... */
+	uint16_t	a_flags;	/* see below */
+	uint16_t	a_type;		/* allow or deny */
+	uint8_t		a_obj_type[16];	/* obj type */
+	uint8_t		a_inherit_obj_type[16];  /* inherit obj */
+} ace_object_t;
+
+#endif
+
+#define	ACE_ALL_PERMS	(ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
+    ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_READ_NAMED_ATTRS| \
+    ACE_WRITE_NAMED_ATTRS|ACE_EXECUTE|ACE_DELETE_CHILD|ACE_READ_ATTRIBUTES| \
+    ACE_WRITE_ATTRIBUTES|ACE_DELETE|ACE_READ_ACL|ACE_WRITE_ACL| \
+    ACE_WRITE_OWNER|ACE_SYNCHRONIZE)
+
+#define	ACE_ALL_WRITE_PERMS (ACE_WRITE_DATA|ACE_APPEND_DATA| \
+    ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS|ACE_WRITE_ACL| \
+    ACE_WRITE_OWNER|ACE_DELETE|ACE_DELETE_CHILD)
+
+#define	ACE_READ_PERMS	(ACE_READ_DATA|ACE_READ_ACL|ACE_READ_ATTRIBUTES| \
+    ACE_READ_NAMED_ATTRS)
+
+#define	ACE_WRITE_PERMS	(ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES| \
+    ACE_WRITE_NAMED_ATTRS)
+
+#define	ACE_MODIFY_PERMS (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \
+    ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_READ_NAMED_ATTRS| \
+    ACE_WRITE_NAMED_ATTRS|ACE_EXECUTE|ACE_DELETE_CHILD|ACE_READ_ATTRIBUTES| \
+    ACE_WRITE_ATTRIBUTES|ACE_DELETE|ACE_READ_ACL|ACE_SYNCHRONIZE)
+/*
+ * The following flags are supported by both NFSv4 ACLs and ace_t.
+ */
+#define	ACE_NFSV4_SUP_FLAGS (ACE_FILE_INHERIT_ACE | \
+    ACE_DIRECTORY_INHERIT_ACE | \
+    ACE_NO_PROPAGATE_INHERIT_ACE | \
+    ACE_INHERIT_ONLY_ACE | \
+    ACE_IDENTIFIER_GROUP)
+
+#define	ACE_TYPE_FLAGS		(ACE_OWNER|ACE_GROUP|ACE_EVERYONE| \
+    ACE_IDENTIFIER_GROUP)
+#define	ACE_INHERIT_FLAGS	(ACE_FILE_INHERIT_ACE| \
+    ACE_DIRECTORY_INHERIT_ACE|ACE_NO_PROPAGATE_INHERIT_ACE|ACE_INHERIT_ONLY_ACE)
+
+/* cmd args to acl(2) for aclent_t  */
+#define	GETACL			1
+#define	SETACL			2
+#define	GETACLCNT		3
+
+/* cmd's to manipulate ace acls. */
+#define	ACE_GETACL		4
+#define	ACE_SETACL		5
+#define	ACE_GETACLCNT		6
+
+/* minimal acl entries from GETACLCNT */
+#define	MIN_ACL_ENTRIES		4
+
+#if !defined(_KERNEL)
+
+/* acl check errors */
+#define	GRP_ERROR		1
+#define	USER_ERROR		2
+#define	OTHER_ERROR		3
+#define	CLASS_ERROR		4
+#define	DUPLICATE_ERROR		5
+#define	MISS_ERROR		6
+#define	MEM_ERROR		7
+#define	ENTRY_ERROR		8
+
+
+/*
+ * similar to ufs_acl.h: changed to char type for user commands (tar, cpio)
+ * Attribute types
+ */
+#define	UFSD_FREE	('0')	/* Free entry */
+#define	UFSD_ACL	('1')	/* Access Control Lists */
+#define	UFSD_DFACL	('2')	/* reserved for future use */
+#define	ACE_ACL		('3')	/* ace_t style acls */
+
+/*
+ * flag to [f]acl_get()
+ * controls whether a trivial acl should be returned.
+ */
+#define	ACL_NO_TRIVIAL	0x2
+
+
+/*
+ * Flags to control acl_totext()
+ */
+
+#define	ACL_APPEND_ID	0x1 	/* append uid/gid to user/group entries */
+#define	ACL_COMPACT_FMT	0x2 	/* build ACL in ls -V format */
+#define	ACL_NORESOLVE	0x4	/* don't do name service lookups */
+#define	ACL_SID_FMT	0x8	/* use usersid/groupsid when appropriate */
+
+/*
+ * Legacy aclcheck errors for aclent_t ACLs
+ */
+#define	EACL_GRP_ERROR		GRP_ERROR
+#define	EACL_USER_ERROR		USER_ERROR
+#define	EACL_OTHER_ERROR	OTHER_ERROR
+#define	EACL_CLASS_ERROR	CLASS_ERROR
+#define	EACL_DUPLICATE_ERROR	DUPLICATE_ERROR
+#define	EACL_MISS_ERROR		MISS_ERROR
+#define	EACL_MEM_ERROR		MEM_ERROR
+#define	EACL_ENTRY_ERROR	ENTRY_ERROR
+
+#define	EACL_INHERIT_ERROR	9		/* invalid inherit flags */
+#define	EACL_FLAGS_ERROR	10		/* unknown flag value */
+#define	EACL_PERM_MASK_ERROR	11		/* unknown permission */
+#define	EACL_COUNT_ERROR	12		/* invalid acl count */
+
+#define	EACL_INVALID_SLOT	13		/* invalid acl slot */
+#define	EACL_NO_ACL_ENTRY	14		/* Entry doesn't exist */
+#define	EACL_DIFF_TYPE		15		/* acls aren't same type */
+
+#define	EACL_INVALID_USER_GROUP	16		/* need user/group name */
+#define	EACL_INVALID_STR	17		/* invalid acl string */
+#define	EACL_FIELD_NOT_BLANK	18		/* can't have blank field */
+#define	EACL_INVALID_ACCESS_TYPE 19		/* invalid access type */
+#define	EACL_UNKNOWN_DATA	20		/* Unrecognized data in ACL */
+#define	EACL_MISSING_FIELDS	21		/* missing fields in acl */
+
+#define	EACL_INHERIT_NOTDIR	22		/* Need dir for inheritance */
+
+extern int aclcheck(aclent_t *, int, int *);
+extern int acltomode(aclent_t *, int, mode_t *);
+extern int aclfrommode(aclent_t *, int, mode_t *);
+extern int aclsort(int, int, aclent_t *);
+extern char *acltotext(aclent_t *, int);
+extern aclent_t *aclfromtext(char *, int *);
+extern void acl_free(acl_t *);
+extern int acl_get(const char *, int, acl_t **);
+extern int facl_get(int, int, acl_t **);
+extern int acl_set(const char *, acl_t *acl);
+extern int facl_set(int, acl_t *acl);
+extern int acl_strip(const char *, uid_t, gid_t, mode_t);
+extern int acl_trivial(const char *);
+extern char *acl_totext(acl_t *, int);
+extern int acl_fromtext(const char *, acl_t **);
+extern int acl_check(acl_t *, int);
+
+#else	/* !defined(_KERNEL) */
+
+extern void ksort(caddr_t, int, int, int (*)(void *, void *));
+extern int cmp2acls(void *, void *);
+
+#endif	/* !defined(_KERNEL) */
+
+#if defined(__STDC__)
+extern int acl(const char *path, int cmd, int cnt, void *buf);
+extern int facl(int fd, int cmd, int cnt, void *buf);
+#else	/* !__STDC__ */
+extern int acl();
+extern int facl();
+#endif	/* defined(__STDC__) */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_ACL_H */
diff --git a/uts/common/sys/acl_impl.h b/uts/common/sys/acl_impl.h
new file mode 100644
index 000000000000..b82f259143ac
--- /dev/null
+++ b/uts/common/sys/acl_impl.h
@@ -0,0 +1,61 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_ACL_IMPL_H
+#define	_SYS_ACL_IMPL_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * acl flags
+ *
+ * ACL_AUTO_INHERIT, ACL_PROTECTED and ACL_DEFAULTED
+ * flags can also be stored in this field.
+ */
+#define	ACL_IS_TRIVIAL	0x10000
+#define	ACL_IS_DIR	0x20000
+
+typedef enum acl_type {
+	ACLENT_T = 0,
+	ACE_T = 1
+} acl_type_t;
+
+struct acl_info {
+	acl_type_t acl_type;		/* style of acl */
+	int acl_cnt;			/* number of acl entries */
+	int acl_entry_size;		/* sizeof acl entry */
+	int acl_flags;			/* special flags about acl */
+	void *acl_aclp;			/* the acl */
+};
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_ACL_IMPL_H */
diff --git a/uts/common/sys/avl.h b/uts/common/sys/avl.h
new file mode 100644
index 000000000000..ba305c908239
--- /dev/null
+++ b/uts/common/sys/avl.h
@@ -0,0 +1,309 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_AVL_H
+#define	_AVL_H
+
+/*
+ * This is a private header file.  Applications should not directly include
+ * this file.
+ */
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#include <sys/types.h>
+#include <sys/avl_impl.h>
+
+/*
+ * This is a generic implemenatation of AVL trees for use in the Solaris kernel.
+ * The interfaces provide an efficient way of implementing an ordered set of
+ * data structures.
+ *
+ * AVL trees provide an alternative to using an ordered linked list. Using AVL
+ * trees will usually be faster, however they requires more storage. An ordered
+ * linked list in general requires 2 pointers in each data structure. The
+ * AVL tree implementation uses 3 pointers. The following chart gives the
+ * approximate performance of operations with the different approaches:
+ *
+ *	Operation	 Link List	AVL tree
+ *	---------	 --------	--------
+ *	lookup		   O(n)		O(log(n))
+ *
+ *	insert 1 node	 constant	constant
+ *
+ *	delete 1 node	 constant	between constant and O(log(n))
+ *
+ *	delete all nodes   O(n)		O(n)
+ *
+ *	visit the next
+ *	or prev node	 constant	between constant and O(log(n))
+ *
+ *
+ * The data structure nodes are anchored at an "avl_tree_t" (the equivalent
+ * of a list header) and the individual nodes will have a field of
+ * type "avl_node_t" (corresponding to list pointers).
+ *
+ * The type "avl_index_t" is used to indicate a position in the list for
+ * certain calls.
+ *
+ * The usage scenario is generally:
+ *
+ * 1. Create the list/tree with: avl_create()
+ *
+ * followed by any mixture of:
+ *
+ * 2a. Insert nodes with: avl_add(), or avl_find() and avl_insert()
+ *
+ * 2b. Visited elements with:
+ *	 avl_first() - returns the lowest valued node
+ *	 avl_last() - returns the highest valued node
+ *	 AVL_NEXT() - given a node go to next higher one
+ *	 AVL_PREV() - given a node go to previous lower one
+ *
+ * 2c.  Find the node with the closest value either less than or greater
+ *	than a given value with avl_nearest().
+ *
+ * 2d. Remove individual nodes from the list/tree with avl_remove().
+ *
+ * and finally when the list is being destroyed
+ *
+ * 3. Use avl_destroy_nodes() to quickly process/free up any remaining nodes.
+ *    Note that once you use avl_destroy_nodes(), you can no longer
+ *    use any routine except avl_destroy_nodes() and avl_destoy().
+ *
+ * 4. Use avl_destroy() to destroy the AVL tree itself.
+ *
+ * Any locking for multiple thread access is up to the user to provide, just
+ * as is needed for any linked list implementation.
+ */
+
+
+/*
+ * Type used for the root of the AVL tree.
+ */
+typedef struct avl_tree avl_tree_t;
+
+/*
+ * The data nodes in the AVL tree must have a field of this type.
+ */
+typedef struct avl_node avl_node_t;
+
+/*
+ * An opaque type used to locate a position in the tree where a node
+ * would be inserted.
+ */
+typedef uintptr_t avl_index_t;
+
+
+/*
+ * Direction constants used for avl_nearest().
+ */
+#define	AVL_BEFORE	(0)
+#define	AVL_AFTER	(1)
+
+
+/*
+ * Prototypes
+ *
+ * Where not otherwise mentioned, "void *" arguments are a pointer to the
+ * user data structure which must contain a field of type avl_node_t.
+ *
+ * Also assume the user data structures looks like:
+ *	stuct my_type {
+ *		...
+ *		avl_node_t	my_link;
+ *		...
+ *	};
+ */
+
+/*
+ * Initialize an AVL tree. Arguments are:
+ *
+ * tree   - the tree to be initialized
+ * compar - function to compare two nodes, it must return exactly: -1, 0, or +1
+ *          -1 for <, 0 for ==, and +1 for >
+ * size   - the value of sizeof(struct my_type)
+ * offset - the value of OFFSETOF(struct my_type, my_link)
+ */
+extern void avl_create(avl_tree_t *tree,
+	int (*compar) (const void *, const void *), size_t size, size_t offset);
+
+
+/*
+ * Find a node with a matching value in the tree. Returns the matching node
+ * found. If not found, it returns NULL and then if "where" is not NULL it sets
+ * "where" for use with avl_insert() or avl_nearest().
+ *
+ * node   - node that has the value being looked for
+ * where  - position for use with avl_nearest() or avl_insert(), may be NULL
+ */
+extern void *avl_find(avl_tree_t *tree, const void *node, avl_index_t *where);
+
+/*
+ * Insert a node into the tree.
+ *
+ * node   - the node to insert
+ * where  - position as returned from avl_find()
+ */
+extern void avl_insert(avl_tree_t *tree, void *node, avl_index_t where);
+
+/*
+ * Insert "new_data" in "tree" in the given "direction" either after
+ * or before the data "here".
+ *
+ * This might be usefull for avl clients caching recently accessed
+ * data to avoid doing avl_find() again for insertion.
+ *
+ * new_data	- new data to insert
+ * here		- existing node in "tree"
+ * direction	- either AVL_AFTER or AVL_BEFORE the data "here".
+ */
+extern void avl_insert_here(avl_tree_t *tree, void *new_data, void *here,
+    int direction);
+
+
+/*
+ * Return the first or last valued node in the tree. Will return NULL
+ * if the tree is empty.
+ *
+ */
+extern void *avl_first(avl_tree_t *tree);
+extern void *avl_last(avl_tree_t *tree);
+
+
+/*
+ * Return the next or previous valued node in the tree.
+ * AVL_NEXT() will return NULL if at the last node.
+ * AVL_PREV() will return NULL if at the first node.
+ *
+ * node   - the node from which the next or previous node is found
+ */
+#define	AVL_NEXT(tree, node)	avl_walk(tree, node, AVL_AFTER)
+#define	AVL_PREV(tree, node)	avl_walk(tree, node, AVL_BEFORE)
+
+
+/*
+ * Find the node with the nearest value either greater or less than
+ * the value from a previous avl_find(). Returns the node or NULL if
+ * there isn't a matching one.
+ *
+ * where     - position as returned from avl_find()
+ * direction - either AVL_BEFORE or AVL_AFTER
+ *
+ * EXAMPLE get the greatest node that is less than a given value:
+ *
+ *	avl_tree_t *tree;
+ *	struct my_data look_for_value = {....};
+ *	struct my_data *node;
+ *	struct my_data *less;
+ *	avl_index_t where;
+ *
+ *	node = avl_find(tree, &look_for_value, &where);
+ *	if (node != NULL)
+ *		less = AVL_PREV(tree, node);
+ *	else
+ *		less = avl_nearest(tree, where, AVL_BEFORE);
+ */
+extern void *avl_nearest(avl_tree_t *tree, avl_index_t where, int direction);
+
+
+/*
+ * Add a single node to the tree.
+ * The node must not be in the tree, and it must not
+ * compare equal to any other node already in the tree.
+ *
+ * node   - the node to add
+ */
+extern void avl_add(avl_tree_t *tree, void *node);
+
+
+/*
+ * Remove a single node from the tree.  The node must be in the tree.
+ *
+ * node   - the node to remove
+ */
+extern void avl_remove(avl_tree_t *tree, void *node);
+
+/*
+ * Reinsert a node only if its order has changed relative to its nearest
+ * neighbors. To optimize performance avl_update_lt() checks only the previous
+ * node and avl_update_gt() checks only the next node. Use avl_update_lt() and
+ * avl_update_gt() only if you know the direction in which the order of the
+ * node may change.
+ */
+extern boolean_t avl_update(avl_tree_t *, void *);
+extern boolean_t avl_update_lt(avl_tree_t *, void *);
+extern boolean_t avl_update_gt(avl_tree_t *, void *);
+
+/*
+ * Return the number of nodes in the tree
+ */
+extern ulong_t avl_numnodes(avl_tree_t *tree);
+
+/*
+ * Return B_TRUE if there are zero nodes in the tree, B_FALSE otherwise.
+ */
+extern boolean_t avl_is_empty(avl_tree_t *tree);
+
+/*
+ * Used to destroy any remaining nodes in a tree. The cookie argument should
+ * be initialized to NULL before the first call. Returns a node that has been
+ * removed from the tree and may be free()'d. Returns NULL when the tree is
+ * empty.
+ *
+ * Once you call avl_destroy_nodes(), you can only continuing calling it and
+ * finally avl_destroy(). No other AVL routines will be valid.
+ *
+ * cookie - a "void *" used to save state between calls to avl_destroy_nodes()
+ *
+ * EXAMPLE:
+ *	avl_tree_t *tree;
+ *	struct my_data *node;
+ *	void *cookie;
+ *
+ *	cookie = NULL;
+ *	while ((node = avl_destroy_nodes(tree, &cookie)) != NULL)
+ *		free(node);
+ *	avl_destroy(tree);
+ */
+extern void *avl_destroy_nodes(avl_tree_t *tree, void **cookie);
+
+
+/*
+ * Final destroy of an AVL tree. Arguments are:
+ *
+ * tree   - the empty tree to destroy
+ */
+extern void avl_destroy(avl_tree_t *tree);
+
+
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _AVL_H */
diff --git a/uts/common/sys/avl_impl.h b/uts/common/sys/avl_impl.h
new file mode 100644
index 000000000000..620685f370d4
--- /dev/null
+++ b/uts/common/sys/avl_impl.h
@@ -0,0 +1,164 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_AVL_IMPL_H
+#define	_AVL_IMPL_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ * This is a private header file.  Applications should not directly include
+ * this file.
+ */
+
+#include <sys/types.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+
+/*
+ * generic AVL tree implementation for kernel use
+ *
+ * There are 5 pieces of information stored for each node in an AVL tree
+ *
+ * 	pointer to less than child
+ * 	pointer to greater than child
+ * 	a pointer to the parent of this node
+ *	an indication  [0/1]  of which child I am of my parent
+ * 	a "balance" (-1, 0, +1)  indicating which child tree is taller
+ *
+ * Since they only need 3 bits, the last two fields are packed into the
+ * bottom bits of the parent pointer on 64 bit machines to save on space.
+ */
+
+#ifndef _LP64
+
+struct avl_node {
+	struct avl_node *avl_child[2];	/* left/right children */
+	struct avl_node *avl_parent;	/* this node's parent */
+	unsigned short avl_child_index;	/* my index in parent's avl_child[] */
+	short avl_balance;		/* balance value: -1, 0, +1 */
+};
+
+#define	AVL_XPARENT(n)		((n)->avl_parent)
+#define	AVL_SETPARENT(n, p)	((n)->avl_parent = (p))
+
+#define	AVL_XCHILD(n)		((n)->avl_child_index)
+#define	AVL_SETCHILD(n, c)	((n)->avl_child_index = (unsigned short)(c))
+
+#define	AVL_XBALANCE(n)		((n)->avl_balance)
+#define	AVL_SETBALANCE(n, b)	((n)->avl_balance = (short)(b))
+
+#else /* _LP64 */
+
+/*
+ * for 64 bit machines, avl_pcb contains parent pointer, balance and child_index
+ * values packed in the following manner:
+ *
+ * |63                                  3|        2        |1          0 |
+ * |-------------------------------------|-----------------|-------------|
+ * |      avl_parent hi order bits       | avl_child_index | avl_balance |
+ * |                                     |                 |     + 1     |
+ * |-------------------------------------|-----------------|-------------|
+ *
+ */
+struct avl_node {
+	struct avl_node *avl_child[2];	/* left/right children nodes */
+	uintptr_t avl_pcb;		/* parent, child_index, balance */
+};
+
+/*
+ * macros to extract/set fields in avl_pcb
+ *
+ * pointer to the parent of the current node is the high order bits
+ */
+#define	AVL_XPARENT(n)		((struct avl_node *)((n)->avl_pcb & ~7))
+#define	AVL_SETPARENT(n, p)						\
+	((n)->avl_pcb = (((n)->avl_pcb & 7) | (uintptr_t)(p)))
+
+/*
+ * index of this node in its parent's avl_child[]: bit #2
+ */
+#define	AVL_XCHILD(n)		(((n)->avl_pcb >> 2) & 1)
+#define	AVL_SETCHILD(n, c)						\
+	((n)->avl_pcb = (uintptr_t)(((n)->avl_pcb & ~4) | ((c) << 2)))
+
+/*
+ * balance indication for a node, lowest 2 bits. A valid balance is
+ * -1, 0, or +1, and is encoded by adding 1 to the value to get the
+ * unsigned values of 0, 1, 2.
+ */
+#define	AVL_XBALANCE(n)		((int)(((n)->avl_pcb & 3) - 1))
+#define	AVL_SETBALANCE(n, b)						\
+	((n)->avl_pcb = (uintptr_t)((((n)->avl_pcb & ~3) | ((b) + 1))))
+
+#endif /* _LP64 */
+
+
+
+/*
+ * switch between a node and data pointer for a given tree
+ * the value of "o" is tree->avl_offset
+ */
+#define	AVL_NODE2DATA(n, o)	((void *)((uintptr_t)(n) - (o)))
+#define	AVL_DATA2NODE(d, o)	((struct avl_node *)((uintptr_t)(d) + (o)))
+
+
+
+/*
+ * macros used to create/access an avl_index_t
+ */
+#define	AVL_INDEX2NODE(x)	((avl_node_t *)((x) & ~1))
+#define	AVL_INDEX2CHILD(x)	((x) & 1)
+#define	AVL_MKINDEX(n, c)	((avl_index_t)(n) | (c))
+
+
+/*
+ * The tree structure. The fields avl_root, avl_compar, and avl_offset come
+ * first since they are needed for avl_find().  We want them to fit into
+ * a single 64 byte cache line to make avl_find() as fast as possible.
+ */
+struct avl_tree {
+	struct avl_node *avl_root;	/* root node in tree */
+	int (*avl_compar)(const void *, const void *);
+	size_t avl_offset;		/* offsetof(type, avl_link_t field) */
+	ulong_t avl_numnodes;		/* number of nodes in the tree */
+	size_t avl_size;		/* sizeof user type struct */
+};
+
+
+/*
+ * This will only by used via AVL_NEXT() or AVL_PREV()
+ */
+extern void *avl_walk(struct avl_tree *, void *, int);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _AVL_IMPL_H */
diff --git a/uts/common/sys/bitmap.h b/uts/common/sys/bitmap.h
new file mode 100644
index 000000000000..d0dd12b68318
--- /dev/null
+++ b/uts/common/sys/bitmap.h
@@ -0,0 +1,194 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+
+#ifndef _SYS_BITMAP_H
+#define	_SYS_BITMAP_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#include <sys/feature_tests.h>
+#if defined(__GNUC__) && defined(_ASM_INLINES) && \
+	(defined(__i386) || defined(__amd64))
+#include <asm/bitmap.h>
+#endif
+
+/*
+ * Operations on bitmaps of arbitrary size
+ * A bitmap is a vector of 1 or more ulong_t's.
+ * The user of the package is responsible for range checks and keeping
+ * track of sizes.
+ */
+
+#ifdef _LP64
+#define	BT_ULSHIFT	6 /* log base 2 of BT_NBIPUL, to extract word index */
+#define	BT_ULSHIFT32	5 /* log base 2 of BT_NBIPUL, to extract word index */
+#else
+#define	BT_ULSHIFT	5 /* log base 2 of BT_NBIPUL, to extract word index */
+#endif
+
+#define	BT_NBIPUL	(1 << BT_ULSHIFT)	/* n bits per ulong_t */
+#define	BT_ULMASK	(BT_NBIPUL - 1)		/* to extract bit index */
+
+#ifdef _LP64
+#define	BT_NBIPUL32	(1 << BT_ULSHIFT32)	/* n bits per ulong_t */
+#define	BT_ULMASK32	(BT_NBIPUL32 - 1)	/* to extract bit index */
+#define	BT_ULMAXMASK	0xffffffffffffffff	/* used by bt_getlowbit */
+#else
+#define	BT_ULMAXMASK	0xffffffff
+#endif
+
+/*
+ * bitmap is a ulong_t *, bitindex an index_t
+ *
+ * The macros BT_WIM and BT_BIW internal; there is no need
+ * for users of this package to use them.
+ */
+
+/*
+ * word in map
+ */
+#define	BT_WIM(bitmap, bitindex) \
+	((bitmap)[(bitindex) >> BT_ULSHIFT])
+/*
+ * bit in word
+ */
+#define	BT_BIW(bitindex) \
+	(1UL << ((bitindex) & BT_ULMASK))
+
+#ifdef _LP64
+#define	BT_WIM32(bitmap, bitindex) \
+	((bitmap)[(bitindex) >> BT_ULSHIFT32])
+
+#define	BT_BIW32(bitindex) \
+	(1UL << ((bitindex) & BT_ULMASK32))
+#endif
+
+/*
+ * These are public macros
+ *
+ * BT_BITOUL == n bits to n ulong_t's
+ */
+#define	BT_BITOUL(nbits) \
+	(((nbits) + BT_NBIPUL - 1l) / BT_NBIPUL)
+#define	BT_SIZEOFMAP(nbits) \
+	(BT_BITOUL(nbits) * sizeof (ulong_t))
+#define	BT_TEST(bitmap, bitindex) \
+	((BT_WIM((bitmap), (bitindex)) & BT_BIW(bitindex)) ? 1 : 0)
+#define	BT_SET(bitmap, bitindex) \
+	{ BT_WIM((bitmap), (bitindex)) |= BT_BIW(bitindex); }
+#define	BT_CLEAR(bitmap, bitindex) \
+	{ BT_WIM((bitmap), (bitindex)) &= ~BT_BIW(bitindex); }
+
+#ifdef _LP64
+#define	BT_BITOUL32(nbits) \
+	(((nbits) + BT_NBIPUL32 - 1l) / BT_NBIPUL32)
+#define	BT_SIZEOFMAP32(nbits) \
+	(BT_BITOUL32(nbits) * sizeof (uint_t))
+#define	BT_TEST32(bitmap, bitindex) \
+	((BT_WIM32((bitmap), (bitindex)) & BT_BIW32(bitindex)) ? 1 : 0)
+#define	BT_SET32(bitmap, bitindex) \
+	{ BT_WIM32((bitmap), (bitindex)) |= BT_BIW32(bitindex); }
+#define	BT_CLEAR32(bitmap, bitindex) \
+	{ BT_WIM32((bitmap), (bitindex)) &= ~BT_BIW32(bitindex); }
+#endif /* _LP64 */
+
+
+/*
+ * BIT_ONLYONESET is a private macro not designed for bitmaps of
+ * arbitrary size.  u must be an unsigned integer/long.  It returns
+ * true if one and only one bit is set in u.
+ */
+#define	BIT_ONLYONESET(u) \
+	((((u) == 0) ? 0 : ((u) & ((u) - 1)) == 0))
+
+#if defined(_KERNEL) && !defined(_ASM)
+#include <sys/atomic.h>
+
+/*
+ * return next available bit index from map with specified number of bits
+ */
+extern index_t	bt_availbit(ulong_t *bitmap, size_t nbits);
+/*
+ * find the highest order bit that is on, and is within or below
+ * the word specified by wx
+ */
+extern int	bt_gethighbit(ulong_t *mapp, int wx);
+extern int	bt_range(ulong_t *bitmap, size_t *pos1, size_t *pos2,
+			size_t end_pos);
+/*
+ * Find highest and lowest one bit set.
+ *	Returns bit number + 1 of bit that is set, otherwise returns 0.
+ * Low order bit is 0, high order bit is 31.
+ */
+extern int	highbit(ulong_t);
+extern int	lowbit(ulong_t);
+extern int	bt_getlowbit(ulong_t *bitmap, size_t start, size_t stop);
+extern void	bt_copy(ulong_t *, ulong_t *, ulong_t);
+
+/*
+ * find the parity
+ */
+extern int	odd_parity(ulong_t);
+
+/*
+ * Atomically set/clear bits
+ * Atomic exclusive operations will set "result" to "-1"
+ * if the bit is already set/cleared. "result" will be set
+ * to 0 otherwise.
+ */
+#define	BT_ATOMIC_SET(bitmap, bitindex) \
+	{ atomic_or_long(&(BT_WIM(bitmap, bitindex)), BT_BIW(bitindex)); }
+#define	BT_ATOMIC_CLEAR(bitmap, bitindex) \
+	{ atomic_and_long(&(BT_WIM(bitmap, bitindex)), ~BT_BIW(bitindex)); }
+
+#define	BT_ATOMIC_SET_EXCL(bitmap, bitindex, result) \
+	{ result = atomic_set_long_excl(&(BT_WIM(bitmap, bitindex)),	\
+	    (bitindex) % BT_NBIPUL); }
+#define	BT_ATOMIC_CLEAR_EXCL(bitmap, bitindex, result) \
+	{ result = atomic_clear_long_excl(&(BT_WIM(bitmap, bitindex)),	\
+	    (bitindex) % BT_NBIPUL); }
+
+/*
+ * Extracts bits between index h (high, inclusive) and l (low, exclusive) from
+ * u, which must be an unsigned integer.
+ */
+#define	BITX(u, h, l)	(((u) >> (l)) & ((1LU << ((h) - (l) + 1LU)) - 1LU))
+
+#endif	/* _KERNEL && !_ASM */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_BITMAP_H */
diff --git a/uts/common/sys/callb.h b/uts/common/sys/callb.h
new file mode 100644
index 000000000000..302f314b800a
--- /dev/null
+++ b/uts/common/sys/callb.h
@@ -0,0 +1,213 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_CALLB_H
+#define	_SYS_CALLB_H
+
+#include <sys/t_lock.h>
+#include <sys/thread.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * definitions of callback classes (c_class)
+ *
+ * Callbacks belong in the same class if (1) their callback routines
+ * do the same kind of processing (ideally, using the same callback function)
+ * and (2) they can/should be executed at the same time in a cpr
+ * suspend/resume operation.
+ *
+ * Note: The DAEMON class, in particular, is for stopping kernel threads
+ * and nothing else.  The CALLB_* macros below should be used to deal
+ * with kernel threads, and the callback function should be callb_generic_cpr.
+ * Another idiosyncrasy of the DAEMON class is that if a suspend operation
+ * fails, some of the callback functions may be called with the RESUME
+ * code which were never called with SUSPEND.  Not a problem currently,
+ * but see bug 4201851.
+ */
+#define	CB_CL_CPR_DAEMON	0
+#define	CB_CL_CPR_VM		1
+#define	CB_CL_CPR_CALLOUT	2
+#define	CB_CL_CPR_OBP		3
+#define	CB_CL_CPR_FB		4
+#define	CB_CL_PANIC		5
+#define	CB_CL_CPR_RPC		6
+#define	CB_CL_CPR_PROMPRINTF	7
+#define	CB_CL_UADMIN		8
+#define	CB_CL_CPR_PM		9
+#define	CB_CL_HALT		10
+#define	CB_CL_CPR_DMA		11
+#define	CB_CL_CPR_POST_USER	12
+#define	CB_CL_UADMIN_PRE_VFS    13
+#define	CB_CL_MDBOOT		CB_CL_UADMIN
+#define	CB_CL_ENTER_DEBUGGER	14
+#define	CB_CL_CPR_POST_KERNEL	15
+#define	CB_CL_CPU_DEEP_IDLE	16
+#define	NCBCLASS		17 /* CHANGE ME if classes are added/removed */
+
+/*
+ * CB_CL_CPR_DAEMON class specific definitions are given below:
+ */
+
+/*
+ * code for CPR callb_execute_class
+ */
+#define	CB_CODE_CPR_CHKPT	0
+#define	CB_CODE_CPR_RESUME	1
+
+typedef	void *		callb_id_t;
+/*
+ * Per kernel thread structure for CPR daemon callbacks.
+ * Must be protected by either a existing lock in the daemon or
+ * a new lock created for such a purpose.
+ */
+typedef struct callb_cpr {
+	kmutex_t	*cc_lockp;	/* lock to protect this struct */
+	char		cc_events;	/* various events for CPR */
+	callb_id_t	cc_id;		/* callb id address */
+	kcondvar_t	cc_callb_cv;	/* cv for callback waiting */
+	kcondvar_t	cc_stop_cv;	/* cv to checkpoint block */
+} callb_cpr_t;
+
+/*
+ * cc_events definitions
+ */
+#define	CALLB_CPR_START		1	/* a checkpoint request's started */
+#define	CALLB_CPR_SAFE		2	/* thread is safe for CPR */
+#define	CALLB_CPR_ALWAYS_SAFE	4	/* thread is ALWAYS safe for CPR */
+
+/*
+ * Used when checking that all kernel threads are stopped.
+ */
+#define	CALLB_MAX_RETRY		3	/* when waiting for kthread to sleep */
+#define	CALLB_THREAD_DELAY	10	/* ticks allowed to reach sleep */
+#define	CPR_KTHREAD_TIMEOUT_SEC	90	/* secs before callback times out -- */
+					/* due to pwr mgmt of disks, make -- */
+					/* big enough for worst spinup time */
+
+#ifdef  _KERNEL
+/*
+ *
+ * CALLB_CPR_INIT macro is used by kernel threads to add their entry to
+ * the callback table and perform other initialization.  It automatically
+ * adds the thread as being in the callback class CB_CL_CPR_DAEMON.
+ *
+ *	cp    - ptr to the callb_cpr_t structure for this kernel thread
+ *
+ *	lockp - pointer to mutex protecting the callb_cpr_t stuct
+ *
+ *	func  - pointer to the callback function for this kernel thread.
+ *		It has the prototype boolean_t <func>(void *arg, int code)
+ *		where: arg	- ptr to the callb_cpr_t structure
+ *		       code	- not used for this type of callback
+ *		returns: B_TRUE if successful; B_FALSE if unsuccessful.
+ *
+ *	name  - a string giving the name of the kernel thread
+ *
+ * Note: lockp is the lock to protect the callb_cpr_t (cp) structure
+ * later on.  No lock held is needed for this initialization.
+ */
+#define	CALLB_CPR_INIT(cp, lockp, func, name)	{			\
+		bzero((caddr_t)(cp), sizeof (callb_cpr_t));		\
+		(cp)->cc_lockp = lockp;					\
+		(cp)->cc_id = callb_add(func, (void *)(cp),		\
+			CB_CL_CPR_DAEMON, name);			\
+	}
+
+#ifndef __lock_lint
+#define	CALLB_CPR_ASSERT(cp)	ASSERT(MUTEX_HELD((cp)->cc_lockp));
+#else
+#define	CALLB_CPR_ASSERT(cp)
+#endif
+/*
+ * Some threads (like the idle threads) do not adhere to the callback
+ * protocol and are always considered safe.  Such threads must never exit.
+ * They register their presence by calling this macro during their
+ * initialization.
+ *
+ * Args:
+ *	t	- thread pointer of the client kernel thread
+ *	name	- a string giving the name of the kernel thread
+ */
+#define	CALLB_CPR_INIT_SAFE(t, name) {					\
+		(void) callb_add_thread(callb_generic_cpr_safe,		\
+		(void *) &callb_cprinfo_safe, CB_CL_CPR_DAEMON,		\
+		    name, t);						\
+	}
+/*
+ * The lock to protect cp's content must be held before
+ * calling the following two macros.
+ *
+ * Any code region between CALLB_CPR_SAFE_BEGIN and CALLB_CPR_SAFE_END
+ * is safe for checkpoint/resume.
+ */
+#define	CALLB_CPR_SAFE_BEGIN(cp) { 			\
+		CALLB_CPR_ASSERT(cp)			\
+		(cp)->cc_events |= CALLB_CPR_SAFE;	\
+		if ((cp)->cc_events & CALLB_CPR_START)	\
+			cv_signal(&(cp)->cc_callb_cv);	\
+	}
+#define	CALLB_CPR_SAFE_END(cp, lockp) {				\
+		CALLB_CPR_ASSERT(cp)				\
+		while ((cp)->cc_events & CALLB_CPR_START)	\
+			cv_wait(&(cp)->cc_stop_cv, lockp);	\
+		(cp)->cc_events &= ~CALLB_CPR_SAFE;		\
+	}
+/*
+ * cv_destroy is nop right now but may be needed in the future.
+ */
+#define	CALLB_CPR_EXIT(cp) {				\
+		CALLB_CPR_ASSERT(cp)			\
+		(cp)->cc_events |= CALLB_CPR_SAFE;	\
+		if ((cp)->cc_events & CALLB_CPR_START)	\
+			cv_signal(&(cp)->cc_callb_cv);	\
+		mutex_exit((cp)->cc_lockp);		\
+		(void) callb_delete((cp)->cc_id);	\
+		cv_destroy(&(cp)->cc_callb_cv);		\
+		cv_destroy(&(cp)->cc_stop_cv);		\
+	}
+
+extern callb_cpr_t callb_cprinfo_safe;
+extern void	callb_init(void);
+extern callb_id_t callb_add(boolean_t  (*)(void *, int), void *, int, char *);
+extern callb_id_t callb_add_thread(boolean_t (*)(void *, int),
+    void *, int, char *, kthread_id_t);
+extern int	callb_delete(callb_id_t);
+extern void	callb_execute(callb_id_t, int);
+extern void	*callb_execute_class(int, int);
+extern boolean_t callb_generic_cpr(void *, int);
+extern boolean_t callb_generic_cpr_safe(void *, int);
+extern boolean_t callb_is_stopped(kthread_id_t, caddr_t *);
+extern void	callb_lock_table(void);
+extern void	callb_unlock_table(void);
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_CALLB_H */
diff --git a/uts/common/sys/ccompile.h b/uts/common/sys/ccompile.h
new file mode 100644
index 000000000000..c9857b086575
--- /dev/null
+++ b/uts/common/sys/ccompile.h
@@ -0,0 +1,127 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_CCOMPILE_H
+#define	_SYS_CCOMPILE_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ * This file contains definitions designed to enable different compilers
+ * to be used harmoniously on Solaris systems.
+ */
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Allow for version tests for compiler bugs and features.
+ */
+#if defined(__GNUC__)
+#define	__GNUC_VERSION	\
+	(__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
+#else
+#define	__GNUC_VERSION	0
+#endif
+
+#if defined(__ATTRIBUTE_IMPLEMENTED) || defined(__GNUC__)
+
+/*
+ * analogous to lint's PRINTFLIKEn
+ */
+#define	__sun_attr___PRINTFLIKE__(__n)	\
+		__attribute__((__format__(printf, __n, (__n)+1)))
+#define	__sun_attr___VPRINTFLIKE__(__n)	\
+		__attribute__((__format__(printf, __n, 0)))
+
+/*
+ * Handle the kernel printf routines that can take '%b' too
+ */
+#if __GNUC_VERSION < 30402
+/*
+ * XX64 at least this doesn't work correctly yet with 3.4.1 anyway!
+ */
+#define	__sun_attr___KPRINTFLIKE__	__sun_attr___PRINTFLIKE__
+#define	__sun_attr___KVPRINTFLIKE__	__sun_attr___VPRINTFLIKE__
+#else
+#define	__sun_attr___KPRINTFLIKE__(__n)	\
+		__attribute__((__format__(cmn_err, __n, (__n)+1)))
+#define	__sun_attr___KVPRINTFLIKE__(__n) \
+		__attribute__((__format__(cmn_err, __n, 0)))
+#endif
+
+/*
+ * This one's pretty obvious -- the function never returns
+ */
+#define	__sun_attr___noreturn__ __attribute__((__noreturn__))
+
+
+/*
+ * This is an appropriate label for functions that do not
+ * modify their arguments, e.g. strlen()
+ */
+#define	__sun_attr___pure__	__attribute__((__pure__))
+
+/*
+ * This is a stronger form of __pure__. Can be used for functions
+ * that do not modify their arguments and don't depend on global
+ * memory.
+ */
+#define	__sun_attr___const__	__attribute__((__const__))
+
+/*
+ * structure packing like #pragma pack(1)
+ */
+#define	__sun_attr___packed__	__attribute__((__packed__))
+
+#define	___sun_attr_inner(__a)	__sun_attr_##__a
+#define	__sun_attr__(__a)	___sun_attr_inner __a
+
+#else	/* __ATTRIBUTE_IMPLEMENTED || __GNUC__ */
+
+#define	__sun_attr__(__a)
+
+#endif	/* __ATTRIBUTE_IMPLEMENTED || __GNUC__ */
+
+/*
+ * Shorthand versions for readability
+ */
+
+#define	__PRINTFLIKE(__n)	__sun_attr__((__PRINTFLIKE__(__n)))
+#define	__VPRINTFLIKE(__n)	__sun_attr__((__VPRINTFLIKE__(__n)))
+#define	__KPRINTFLIKE(__n)	__sun_attr__((__KPRINTFLIKE__(__n)))
+#define	__KVPRINTFLIKE(__n)	__sun_attr__((__KVPRINTFLIKE__(__n)))
+#define	__NORETURN		__sun_attr__((__noreturn__))
+#define	__CONST			__sun_attr__((__const__))
+#define	__PURE			__sun_attr__((__pure__))
+
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_CCOMPILE_H */
diff --git a/uts/common/sys/compress.h b/uts/common/sys/compress.h
new file mode 100644
index 000000000000..3d79d9511092
--- /dev/null
+++ b/uts/common/sys/compress.h
@@ -0,0 +1,46 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 1998 by Sun Microsystems, Inc.
+ * All rights reserved.
+ */
+
+#ifndef _SYS_COMPRESS_H
+#define	_SYS_COMPRESS_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/types.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+extern size_t compress(void *, void *, size_t);
+extern size_t decompress(void *, void *, size_t, size_t);
+extern uint32_t checksum32(void *, size_t);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_COMPRESS_H */
diff --git a/uts/common/sys/cpupart.h b/uts/common/sys/cpupart.h
index b9e0da4e1993..b44dda5e8418 100644
--- a/uts/common/sys/cpupart.h
+++ b/uts/common/sys/cpupart.h
@@ -19,15 +19,12 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved.
  */
 
 #ifndef	_SYS_CPUPART_H
 #define	_SYS_CPUPART_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 #include <sys/types.h>
 #include <sys/processor.h>
 #include <sys/cpuvar.h>
@@ -58,16 +55,6 @@ typedef int	cpupartid_t;
 #define	CP_ALL		0		/* return all cpu partitions */
 #define	CP_NONEMPTY	1		/* return only non-empty ones */
 
-#if defined(_MACHDEP)
-struct mach_cpupart {
-	cpuset_t	mc_haltset;
-};
-
-extern struct mach_cpupart cp_default_mach;
-#else
-struct mach_cpupart;
-#endif
-
 typedef struct cpupart {
 	disp_t		cp_kp_queue;	/* partition-wide kpreempt queue */
 	cpupartid_t	cp_id;		/* partition ID */
@@ -103,8 +90,7 @@ typedef struct cpupart {
 	lgrp_gen_t	cp_gen;		/* generation number */
 	lgrp_id_t	cp_lgrp_hint;	/* last home lgroup chosen */
 	bitset_t	cp_cmt_pgs;	/* CMT PGs represented */
-
-	struct mach_cpupart *cp_mach;   /* mach-specific */
+	bitset_t	cp_haltset;	/* halted CPUs */
 } cpupart_t;
 
 typedef struct cpupart_kstat {
@@ -138,6 +124,15 @@ extern cpupart_t	*cp_list_head;
 extern uint_t		cp_numparts;
 extern uint_t		cp_numparts_nonempty;
 
+/*
+ * Each partition contains a bitset that indicates which CPUs are halted and
+ * which ones are running. Given the growing number of CPUs in current and
+ * future platforms, it's important to fanout each CPU within its partition's
+ * haltset to prevent contention due to false sharing. The fanout factor
+ * is platform specific, and declared accordingly.
+ */
+extern uint_t cp_haltset_fanout;
+
 extern void	cpupart_initialize_default();
 extern cpupart_t *cpupart_find(psetid_t);
 extern int	cpupart_create(psetid_t *);
diff --git a/uts/common/sys/cpuvar.h b/uts/common/sys/cpuvar.h
index cd0d0278662c..d4075d580be7 100644
--- a/uts/common/sys/cpuvar.h
+++ b/uts/common/sys/cpuvar.h
@@ -20,15 +20,12 @@
  */
 
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
  */
 
 #ifndef _SYS_CPUVAR_H
 #define	_SYS_CPUVAR_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 #include <sys/thread.h>
 #include <sys/sysinfo.h>	/* has cpu_stat_t definition */
 #include <sys/disp.h>
@@ -170,7 +167,7 @@ typedef struct cpu {
 
 	ftrace_data_t	cpu_ftrace;		/* per cpu ftrace data */
 
-	clock_t		cpu_deadman_lbolt;	/* used by deadman() */
+	clock_t		cpu_deadman_counter;	/* used by deadman() */
 	uint_t		cpu_deadman_countdown;	/* used by deadman() */
 
 	kmutex_t	cpu_cpc_ctxlock; /* protects context for idle thread */
@@ -213,12 +210,27 @@ typedef struct cpu {
 	uint64_t	cpu_curr_clock;		/* current clock freq in Hz */
 	char		*cpu_supp_freqs;	/* supported freqs in Hz */
 
+	uintptr_t	cpu_cpcprofile_pc;	/* kernel PC in cpc interrupt */
+	uintptr_t	cpu_cpcprofile_upc;	/* user PC in cpc interrupt */
+
 	/*
 	 * Interrupt load factor used by dispatcher & softcall
 	 */
 	hrtime_t	cpu_intrlast;   /* total interrupt time (nsec) */
 	int		cpu_intrload;   /* interrupt load factor (0-99%) */
 
+	uint_t		cpu_rotor;	/* for cheap pseudo-random numbers */
+
+	struct cu_cpu_info	*cpu_cu_info;	/* capacity & util. info */
+
+	/*
+	 * cpu_generation is updated whenever CPU goes on-line or off-line.
+	 * Updates to cpu_generation are protected by cpu_lock.
+	 *
+	 * See CPU_NEW_GENERATION() macro below.
+	 */
+	volatile uint_t		cpu_generation;	/* tracking on/off-line */
+
 	/*
 	 * New members must be added /before/ this member, as the CTF tools
 	 * rely on this being the last field before cpu_m, so they can
@@ -240,12 +252,13 @@ typedef struct cpu {
  * is up to the platform to assure that this is performed properly.  Note that
  * the structure is sized to avoid false sharing.
  */
-#define	CPUC_SIZE		(sizeof (uint16_t) + sizeof (uintptr_t) + \
-				sizeof (kmutex_t))
+#define	CPUC_SIZE		(sizeof (uint16_t) + sizeof (uint8_t) + \
+				sizeof (uintptr_t) + sizeof (kmutex_t))
 #define	CPUC_PADSIZE		CPU_CACHE_COHERENCE_SIZE - CPUC_SIZE
 
 typedef struct cpu_core {
 	uint16_t	cpuc_dtrace_flags;	/* DTrace flags */
+	uint8_t		cpuc_dcpc_intr_state;	/* DCPC provider intr state */
 	uint8_t		cpuc_pad[CPUC_PADSIZE];	/* padding */
 	uintptr_t	cpuc_dtrace_illval;	/* DTrace illegal value */
 	kmutex_t	cpuc_pid_lock;		/* DTrace pid provider lock */
@@ -263,6 +276,28 @@ extern cpu_core_t cpu_core[];
  */
 #define	CPU_ON_INTR(cpup) ((cpup)->cpu_intr_actv >> (LOCK_LEVEL + 1))
 
+/*
+ * Check to see if an interrupt thread might be active at a given ipl.
+ * If so return true.
+ * We must be conservative--it is ok to give a false yes, but a false no
+ * will cause disaster.  (But if the situation changes after we check it is
+ * ok--the caller is trying to ensure that an interrupt routine has been
+ * exited).
+ * This is used when trying to remove an interrupt handler from an autovector
+ * list in avintr.c.
+ */
+#define	INTR_ACTIVE(cpup, level)	\
+	((level) <= LOCK_LEVEL ? 	\
+	((cpup)->cpu_intr_actv & (1 << (level))) : (CPU_ON_INTR(cpup)))
+
+/*
+ * CPU_PSEUDO_RANDOM() returns a per CPU value that changes each time one
+ * looks at it. It's meant as a cheap mechanism to be incorporated in routines
+ * wanting to avoid biasing, but where true randomness isn't needed (just
+ * something that changes).
+ */
+#define	CPU_PSEUDO_RANDOM() (CPU->cpu_rotor++)
+
 #if defined(_KERNEL) || defined(_KMEMUSER)
 
 #define	INTR_STACK_SIZE	MAX(DEFAULTSTKSZ, PAGESIZE)
@@ -354,7 +389,6 @@ extern cpu_core_t cpu_core[];
 #define	CPU_DISP_DONTSTEAL	0x01	/* CPU undergoing context swtch */
 #define	CPU_DISP_HALTED		0x02	/* CPU halted waiting for interrupt */
 
-
 #endif /* _KERNEL || _KMEMUSER */
 
 #if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP)
@@ -518,15 +552,18 @@ extern cpuset_t cpu_seqid_inuse;
 #if defined(_KERNEL) || defined(_KMEMUSER)
 
 extern struct cpu	*cpu[];		/* indexed by CPU number */
+extern struct cpu	**cpu_seq;	/* indexed by sequential CPU id */
 extern cpu_t		*cpu_list;	/* list of CPUs */
 extern cpu_t		*cpu_active;	/* list of active CPUs */
 extern int		ncpus;		/* number of CPUs present */
 extern int		ncpus_online;	/* number of CPUs not quiesced */
 extern int		max_ncpus;	/* max present before ncpus is known */
 extern int		boot_max_ncpus;	/* like max_ncpus but for real */
+extern int		boot_ncpus;	/* # cpus present @ boot */
 extern processorid_t	max_cpuid;	/* maximum CPU number */
 extern struct cpu	*cpu_inmotion;	/* offline or partition move target */
 extern cpu_t		*clock_cpu_list;
+extern processorid_t	max_cpu_seqid_ever;	/* maximum seqid ever given */
 
 #if defined(__i386) || defined(__amd64)
 extern struct cpu *curcpup(void);
@@ -570,6 +607,13 @@ extern struct cpu *curcpup(void);
 #define	CPU_STATS(cp, stat)                                       \
 	((cp)->cpu_stats.stat)
 
+/*
+ * Increment CPU generation value.
+ * This macro should be called whenever CPU goes on-line or off-line.
+ * Updates to cpu_generation should be protected by cpu_lock.
+ */
+#define	CPU_NEW_GENERATION(cp)	((cp)->cpu_generation++)
+
 #endif /* _KERNEL || _KMEMUSER */
 
 /*
@@ -659,6 +703,7 @@ int	cpu_get_state(cpu_t *);		/* get current cpu state */
 const char *cpu_get_state_str(cpu_t *);	/* get current cpu state as string */
 
 
+void	cpu_set_curr_clock(uint64_t);	/* indicate the current CPU's freq */
 void	cpu_set_supp_freqs(cpu_t *, const char *); /* set the CPU supported */
 						/* frequencies */
 
@@ -698,6 +743,49 @@ void	cpu_enable_intr(struct cpu *cp); /* start issuing interrupts to cpu */
  */
 extern kmutex_t	cpu_lock;	/* lock protecting CPU data */
 
+/*
+ * CPU state change events
+ *
+ * Various subsystems need to know when CPUs change their state. They get this
+ * information by registering  CPU state change callbacks using
+ * register_cpu_setup_func(). Whenever any CPU changes its state, the callback
+ * function is called. The callback function is passed three arguments:
+ *
+ *   Event, described by cpu_setup_t
+ *   CPU ID
+ *   Transparent pointer passed when registering the callback
+ *
+ * The callback function is called with cpu_lock held. The return value from the
+ * callback function is usually ignored, except for CPU_CONFIG and CPU_UNCONFIG
+ * events. For these two events, non-zero return value indicates a failure and
+ * prevents successful completion of the operation.
+ *
+ * New events may be added in the future. Callback functions should ignore any
+ * events that they do not understand.
+ *
+ * The following events provide notification callbacks:
+ *
+ *  CPU_INIT	A new CPU is started and added to the list of active CPUs
+ *		  This event is only used during boot
+ *
+ *  CPU_CONFIG	A newly inserted CPU is prepared for starting running code
+ *		  This event is called by DR code
+ *
+ *  CPU_UNCONFIG CPU has been powered off and needs cleanup
+ *		  This event is called by DR code
+ *
+ *  CPU_ON	CPU is enabled but does not run anything yet
+ *
+ *  CPU_INTR_ON	CPU is enabled and has interrupts enabled
+ *
+ *  CPU_OFF	CPU is going offline but can still run threads
+ *
+ *  CPU_CPUPART_OUT	CPU is going to move out of its partition
+ *
+ *  CPU_CPUPART_IN	CPU is going to move to a new partition
+ *
+ *  CPU_SETUP	CPU is set up during boot and can run threads
+ */
 typedef enum {
 	CPU_INIT,
 	CPU_CONFIG,
@@ -705,7 +793,9 @@ typedef enum {
 	CPU_ON,
 	CPU_OFF,
 	CPU_CPUPART_IN,
-	CPU_CPUPART_OUT
+	CPU_CPUPART_OUT,
+	CPU_SETUP,
+	CPU_INTR_ON
 } cpu_setup_t;
 
 typedef int cpu_setup_func_t(cpu_setup_t, int, void *);
@@ -719,12 +809,20 @@ extern void unregister_cpu_setup_func(cpu_setup_func_t *, void *);
 extern void cpu_state_change_notify(int, cpu_setup_t);
 
 /*
+ * Call specified function on the given CPU
+ */
+typedef void (*cpu_call_func_t)(uintptr_t, uintptr_t);
+extern void cpu_call(cpu_t *, cpu_call_func_t, uintptr_t, uintptr_t);
+
+
+/*
  * Create various strings that describe the given CPU for the
  * processor_info system call and configuration-related kstats.
  */
 #define	CPU_IDSTRLEN	100
 
 extern void init_cpu_info(struct cpu *);
+extern void populate_idstr(struct cpu *);
 extern void cpu_vm_data_init(struct cpu *);
 extern void cpu_vm_data_destroy(struct cpu *);
 
diff --git a/uts/common/sys/cred.h b/uts/common/sys/cred.h
new file mode 100644
index 000000000000..5056f9a51105
--- /dev/null
+++ b/uts/common/sys/cred.h
@@ -0,0 +1,193 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+/*
+ * Portions of this source code were derived from Berkeley 4.3 BSD
+ * under license from the Regents of the University of California.
+ */
+
+#ifndef _SYS_CRED_H
+#define	_SYS_CRED_H
+
+#include <sys/types.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * The credential is an opaque kernel private data structure defined in
+ * <sys/cred_impl.h>.
+ */
+
+typedef struct cred cred_t;
+
+#ifdef _KERNEL
+
+#define	CRED()		curthread->t_cred
+
+struct proc;				/* cred.h is included in proc.h */
+struct prcred;
+struct ksid;
+struct ksidlist;
+struct credklpd;
+struct credgrp;
+
+struct auditinfo_addr;			/* cred.h is included in audit.h */
+
+extern int ngroups_max;
+/*
+ * kcred is used when you need all privileges.
+ */
+extern struct cred *kcred;
+
+extern void cred_init(void);
+extern void crhold(cred_t *);
+extern void crfree(cred_t *);
+extern cred_t *cralloc(void);		/* all but ref uninitialized */
+extern cred_t *cralloc_ksid(void);	/* cralloc() + ksid alloc'ed */
+extern cred_t *crget(void);		/* initialized */
+extern cred_t *crcopy(cred_t *);
+extern void crcopy_to(cred_t *, cred_t *);
+extern cred_t *crdup(cred_t *);
+extern void crdup_to(cred_t *, cred_t *);
+extern cred_t *crgetcred(void);
+extern void crset(struct proc *, cred_t *);
+extern void crset_zone_privall(cred_t *);
+extern int groupmember(gid_t, const cred_t *);
+extern int supgroupmember(gid_t, const cred_t *);
+extern int hasprocperm(const cred_t *, const cred_t *);
+extern int prochasprocperm(struct proc *, struct proc *, const cred_t *);
+extern int crcmp(const cred_t *, const cred_t *);
+extern cred_t *zone_kcred(void);
+
+extern uid_t crgetuid(const cred_t *);
+extern uid_t crgetruid(const cred_t *);
+extern uid_t crgetsuid(const cred_t *);
+extern gid_t crgetgid(const cred_t *);
+extern gid_t crgetrgid(const cred_t *);
+extern gid_t crgetsgid(const cred_t *);
+extern zoneid_t crgetzoneid(const cred_t *);
+extern projid_t crgetprojid(const cred_t *);
+
+extern cred_t *crgetmapped(const cred_t *);
+
+
+extern const struct auditinfo_addr *crgetauinfo(const cred_t *);
+extern struct auditinfo_addr *crgetauinfo_modifiable(cred_t *);
+
+extern uint_t crgetref(const cred_t *);
+
+extern const gid_t *crgetgroups(const cred_t *);
+extern const gid_t *crgetggroups(const struct credgrp *);
+
+extern int crgetngroups(const cred_t *);
+
+/*
+ * Sets real, effective and/or saved uid/gid;
+ * -1 argument accepted as "no change".
+ */
+extern int crsetresuid(cred_t *, uid_t, uid_t, uid_t);
+extern int crsetresgid(cred_t *, gid_t, gid_t, gid_t);
+
+/*
+ * Sets real, effective and saved uids/gids all to the same
+ * values.  Both values must be non-negative and <= MAXUID
+ */
+extern int crsetugid(cred_t *, uid_t, gid_t);
+
+/*
+ * Functions to handle the supplemental group list.
+ */
+extern int crsetgroups(cred_t *, int, gid_t *);
+extern struct credgrp *crgrpcopyin(int, gid_t *);
+extern void crgrprele(struct credgrp *);
+extern void crsetcredgrp(cred_t *, struct credgrp *);
+
+/*
+ * Private interface for setting zone association of credential.
+ */
+struct zone;
+extern void crsetzone(cred_t *, struct zone *);
+extern struct zone *crgetzone(const cred_t *);
+
+/*
+ * Private interface for setting project id in credential.
+ */
+extern void crsetprojid(cred_t *, projid_t);
+
+/*
+ * Private interface for nfs.
+ */
+extern cred_t *crnetadjust(cred_t *);
+
+/*
+ * Private interface for procfs.
+ */
+extern void cred2prcred(const cred_t *, struct prcred *);
+
+/*
+ * Private interfaces for Rampart Trusted Solaris.
+ */
+struct ts_label_s;
+extern struct ts_label_s *crgetlabel(const cred_t *);
+extern boolean_t crisremote(const cred_t *);
+
+/*
+ * Private interfaces for ephemeral uids.
+ */
+#define	VALID_UID(id, zn)					\
+	((id) <= MAXUID || valid_ephemeral_uid((zn), (id)))
+
+#define	VALID_GID(id, zn)					\
+	((id) <= MAXUID || valid_ephemeral_gid((zn), (id)))
+
+extern boolean_t valid_ephemeral_uid(struct zone *, uid_t);
+extern boolean_t valid_ephemeral_gid(struct zone *, gid_t);
+
+extern int eph_uid_alloc(struct zone *, int, uid_t *, int);
+extern int eph_gid_alloc(struct zone *, int, gid_t *, int);
+
+extern void crsetsid(cred_t *, struct ksid *, int);
+extern void crsetsidlist(cred_t *, struct ksidlist *);
+
+extern struct ksid *crgetsid(const cred_t *, int);
+extern struct ksidlist *crgetsidlist(const cred_t *);
+
+extern int crsetpriv(cred_t *, ...);
+
+extern struct credklpd *crgetcrklpd(const cred_t *);
+extern void crsetcrklpd(cred_t *, struct credklpd *);
+
+#endif	/* _KERNEL */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_CRED_H */
diff --git a/uts/common/sys/debug.h b/uts/common/sys/debug.h
new file mode 100644
index 000000000000..4de39d255e71
--- /dev/null
+++ b/uts/common/sys/debug.h
@@ -0,0 +1,146 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved	*/
+
+#ifndef _SYS_DEBUG_H
+#define	_SYS_DEBUG_H
+
+#include <sys/isa_defs.h>
+#include <sys/types.h>
+#include <sys/note.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * ASSERT(ex) causes a panic or debugger entry if expression ex is not
+ * true.  ASSERT() is included only for debugging, and is a no-op in
+ * production kernels.  VERIFY(ex), on the other hand, behaves like
+ * ASSERT and is evaluated on both debug and non-debug kernels.
+ */
+
+#if defined(__STDC__)
+extern int assfail(const char *, const char *, int);
+#define	VERIFY(EX) ((void)((EX) || assfail(#EX, __FILE__, __LINE__)))
+#if DEBUG
+#define	ASSERT(EX) ((void)((EX) || assfail(#EX, __FILE__, __LINE__)))
+#else
+#define	ASSERT(x)  ((void)0)
+#endif
+#else	/* defined(__STDC__) */
+extern int assfail();
+#define	VERIFY(EX) ((void)((EX) || assfail("EX", __FILE__, __LINE__)))
+#if DEBUG
+#define	ASSERT(EX) ((void)((EX) || assfail("EX", __FILE__, __LINE__)))
+#else
+#define	ASSERT(x)  ((void)0)
+#endif
+#endif	/* defined(__STDC__) */
+
+/*
+ * Assertion variants sensitive to the compilation data model
+ */
+#if defined(_LP64)
+#define	ASSERT64(x)	ASSERT(x)
+#define	ASSERT32(x)
+#else
+#define	ASSERT64(x)
+#define	ASSERT32(x)	ASSERT(x)
+#endif
+
+/*
+ * IMPLY and EQUIV are assertions of the form:
+ *
+ *	if (a) then (b)
+ * and
+ *	if (a) then (b) *AND* if (b) then (a)
+ */
+#if DEBUG
+#define	IMPLY(A, B) \
+	((void)(((!(A)) || (B)) || \
+	    assfail("(" #A ") implies (" #B ")", __FILE__, __LINE__)))
+#define	EQUIV(A, B) \
+	((void)((!!(A) == !!(B)) || \
+	    assfail("(" #A ") is equivalent to (" #B ")", __FILE__, __LINE__)))
+#else
+#define	IMPLY(A, B) ((void)0)
+#define	EQUIV(A, B) ((void)0)
+#endif
+
+/*
+ * ASSERT3() behaves like ASSERT() except that it is an explicit conditional,
+ * and prints out the values of the left and right hand expressions as part of
+ * the panic message to ease debugging.  The three variants imply the type
+ * of their arguments.  ASSERT3S() is for signed data types, ASSERT3U() is
+ * for unsigned, and ASSERT3P() is for pointers.  The VERIFY3*() macros
+ * have the same relationship as above.
+ */
+extern void assfail3(const char *, uintmax_t, const char *, uintmax_t,
+    const char *, int);
+#define	VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) do { \
+	const TYPE __left = (TYPE)(LEFT); \
+	const TYPE __right = (TYPE)(RIGHT); \
+	if (!(__left OP __right)) \
+		assfail3(#LEFT " " #OP " " #RIGHT, \
+			(uintmax_t)__left, #OP, (uintmax_t)__right, \
+			__FILE__, __LINE__); \
+_NOTE(CONSTCOND) } while (0)
+
+#define	VERIFY3S(x, y, z)	VERIFY3_IMPL(x, y, z, int64_t)
+#define	VERIFY3U(x, y, z)	VERIFY3_IMPL(x, y, z, uint64_t)
+#define	VERIFY3P(x, y, z)	VERIFY3_IMPL(x, y, z, uintptr_t)
+#if DEBUG
+#define	ASSERT3S(x, y, z)	VERIFY3_IMPL(x, y, z, int64_t)
+#define	ASSERT3U(x, y, z)	VERIFY3_IMPL(x, y, z, uint64_t)
+#define	ASSERT3P(x, y, z)	VERIFY3_IMPL(x, y, z, uintptr_t)
+#else
+#define	ASSERT3S(x, y, z)	((void)0)
+#define	ASSERT3U(x, y, z)	((void)0)
+#define	ASSERT3P(x, y, z)	((void)0)
+#endif
+
+#ifdef	_KERNEL
+
+extern void abort_sequence_enter(char *);
+extern void debug_enter(char *);
+
+#endif	/* _KERNEL */
+
+#if defined(DEBUG) && !defined(__sun)
+/* CSTYLED */
+#define	STATIC
+#else
+/* CSTYLED */
+#define	STATIC static
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_DEBUG_H */
diff --git a/uts/common/sys/dtrace.h b/uts/common/sys/dtrace.h
index b6e52ec1c4da..007502d7d856 100644
--- a/uts/common/sys/dtrace.h
+++ b/uts/common/sys/dtrace.h
@@ -20,15 +20,13 @@
  */
 
 /*
- * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
 #ifndef _SYS_DTRACE_H
 #define	_SYS_DTRACE_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 #ifdef	__cplusplus
 extern "C" {
 #endif
@@ -664,6 +662,20 @@ typedef struct dof_sec {
 
 #define	DOF_SECF_LOAD		1	/* section should be loaded */
 
+#define	DOF_SEC_ISLOADABLE(x)						\
+	(((x) == DOF_SECT_ECBDESC) || ((x) == DOF_SECT_PROBEDESC) ||	\
+	((x) == DOF_SECT_ACTDESC) || ((x) == DOF_SECT_DIFOHDR) ||	\
+	((x) == DOF_SECT_DIF) || ((x) == DOF_SECT_STRTAB) ||		\
+	((x) == DOF_SECT_VARTAB) || ((x) == DOF_SECT_RELTAB) ||		\
+	((x) == DOF_SECT_TYPTAB) || ((x) == DOF_SECT_URELHDR) ||	\
+	((x) == DOF_SECT_KRELHDR) || ((x) == DOF_SECT_OPTDESC) ||	\
+	((x) == DOF_SECT_PROVIDER) || ((x) == DOF_SECT_PROBES) ||	\
+	((x) == DOF_SECT_PRARGS) || ((x) == DOF_SECT_PROFFS) ||		\
+	((x) == DOF_SECT_INTTAB) || ((x) == DOF_SECT_XLTAB) ||		\
+	((x) == DOF_SECT_XLMEMBERS) || ((x) == DOF_SECT_XLIMPORT) ||	\
+	((x) == DOF_SECT_XLIMPORT) || ((x) == DOF_SECT_XLEXPORT) ||	\
+	((x) == DOF_SECT_PREXPORT) || ((x) == DOF_SECT_PRENOFFS))
+
 typedef struct dof_ecbdesc {
 	dof_secidx_t dofe_probes;	/* link to DOF_SECT_PROBEDESC */
 	dof_secidx_t dofe_pred;		/* link to DOF_SECT_DIFOHDR */
@@ -1382,7 +1394,7 @@ typedef struct dof_helper {
  *   dtps_provide_module(); see "Arguments and Notes" for dtrace_register(),
  *   below.
  *
- * 1.4  void dtps_enable(void *arg, dtrace_id_t id, void *parg)
+ * 1.4  int dtps_enable(void *arg, dtrace_id_t id, void *parg)
  *
  * 1.4.1  Overview
  *
@@ -1403,7 +1415,8 @@ typedef struct dof_helper {
  *
  * 1.4.3  Return value
  *
- *   None.
+ *   On success, dtps_enable() should return 0. On failure, -1 should be
+ *   returned.
  *
  * 1.4.4  Caller's context
  *
@@ -1957,7 +1970,7 @@ typedef struct dof_helper {
 typedef struct dtrace_pops {
 	void (*dtps_provide)(void *arg, const dtrace_probedesc_t *spec);
 	void (*dtps_provide_module)(void *arg, struct modctl *mp);
-	void (*dtps_enable)(void *arg, dtrace_id_t id, void *parg);
+	int (*dtps_enable)(void *arg, dtrace_id_t id, void *parg);
 	void (*dtps_disable)(void *arg, dtrace_id_t id, void *parg);
 	void (*dtps_suspend)(void *arg, dtrace_id_t id, void *parg);
 	void (*dtps_resume)(void *arg, dtrace_id_t id, void *parg);
diff --git a/uts/common/sys/errorq.h b/uts/common/sys/errorq.h
new file mode 100644
index 000000000000..971b19e6ccd8
--- /dev/null
+++ b/uts/common/sys/errorq.h
@@ -0,0 +1,83 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_ERRORQ_H
+#define	_ERRORQ_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/nvpair.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct errorq errorq_t;
+typedef struct errorq_elem errorq_elem_t;
+typedef void (*errorq_func_t)(void *, const void *, const errorq_elem_t *);
+
+/*
+ * Public flags for errorq_create(): bit range 0-15
+ */
+#define	ERRORQ_VITAL	0x0001	/* drain queue automatically on system reset */
+
+/*
+ * Public flags for errorq_dispatch():
+ */
+#define	ERRORQ_ASYNC	0	/* schedule async queue drain for caller */
+#define	ERRORQ_SYNC	1	/* do not schedule drain; caller will drain */
+
+#ifdef	_KERNEL
+
+extern errorq_t *errorq_create(const char *, errorq_func_t, void *,
+    ulong_t, size_t, uint_t, uint_t);
+
+extern errorq_t *errorq_nvcreate(const char *, errorq_func_t, void *,
+    ulong_t, size_t, uint_t, uint_t);
+
+extern void errorq_destroy(errorq_t *);
+extern void errorq_dispatch(errorq_t *, const void *, size_t, uint_t);
+extern void errorq_drain(errorq_t *);
+extern void errorq_init(void);
+extern void errorq_panic(void);
+extern errorq_elem_t *errorq_reserve(errorq_t *);
+extern void errorq_commit(errorq_t *, errorq_elem_t *, uint_t);
+extern void errorq_cancel(errorq_t *, errorq_elem_t *);
+extern nvlist_t *errorq_elem_nvl(errorq_t *, const errorq_elem_t *);
+extern nv_alloc_t *errorq_elem_nva(errorq_t *, const errorq_elem_t *);
+extern void *errorq_elem_dup(errorq_t *, const errorq_elem_t *,
+    errorq_elem_t **);
+extern void errorq_dump();
+
+#endif	/* _KERNEL */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _ERRORQ_H */
diff --git a/uts/common/sys/extdirent.h b/uts/common/sys/extdirent.h
new file mode 100644
index 000000000000..3f9a665f0076
--- /dev/null
+++ b/uts/common/sys/extdirent.h
@@ -0,0 +1,77 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_EXTDIRENT_H
+#define	_SYS_EXTDIRENT_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#include <sys/types.h>
+
+#if defined(_KERNEL)
+
+/*
+ * Extended file-system independent directory entry.  This style of
+ * dirent provides additional informational flag bits for each
+ * directory entry.  This dirent will be returned instead of the
+ * standard dirent if a VOP_READDIR() requests dirent flags via
+ * V_RDDIR_ENTFLAGS, and if the file system supports the flags.
+ */
+typedef struct edirent {
+	ino64_t		ed_ino;		/* "inode number" of entry */
+	off64_t		ed_off;		/* offset of disk directory entry */
+	uint32_t	ed_eflags;	/* per-entry flags */
+	unsigned short	ed_reclen;	/* length of this record */
+	char		ed_name[1];	/* name of file */
+} edirent_t;
+
+#define	EDIRENT_RECLEN(namelen)	\
+	((offsetof(edirent_t, ed_name[0]) + 1 + (namelen) + 7) & ~ 7)
+#define	EDIRENT_NAMELEN(reclen)	\
+	((reclen) - (offsetof(edirent_t, ed_name[0])))
+
+/*
+ * Extended entry flags
+ *	Extended entries include a bitfield of extra information
+ *	regarding that entry.
+ */
+#define	ED_CASE_CONFLICT  0x10  /* Disconsidering case, entry is not unique */
+
+/*
+ * Extended flags accessor function
+ */
+#define	ED_CASE_CONFLICTS(x)	((x)->ed_eflags & ED_CASE_CONFLICT)
+
+#endif /* defined(_KERNEL) */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_EXTDIRENT_H */
diff --git a/uts/common/sys/feature_tests.h b/uts/common/sys/feature_tests.h
new file mode 100644
index 000000000000..43339a83cd7f
--- /dev/null
+++ b/uts/common/sys/feature_tests.h
@@ -0,0 +1,396 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_FEATURE_TESTS_H
+#define	_SYS_FEATURE_TESTS_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/ccompile.h>
+#include <sys/isa_defs.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Values of _POSIX_C_SOURCE
+ *
+ *		undefined   not a POSIX compilation
+ *		1	    POSIX.1-1990 compilation
+ *		2	    POSIX.2-1992 compilation
+ *		199309L	    POSIX.1b-1993 compilation (Real Time)
+ *		199506L	    POSIX.1c-1995 compilation (POSIX Threads)
+ *		200112L	    POSIX.1-2001 compilation (Austin Group Revision)
+ */
+#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
+#define	_POSIX_C_SOURCE 1
+#endif
+
+/*
+ * The feature test macros __XOPEN_OR_POSIX, _STRICT_STDC, and _STDC_C99
+ * are Sun implementation specific macros created in order to compress
+ * common standards specified feature test macros for easier reading.
+ * These macros should not be used by the application developer as
+ * unexpected results may occur. Instead, the user should reference
+ * standards(5) for correct usage of the standards feature test macros.
+ *
+ * __XOPEN_OR_POSIX     Used in cases where a symbol is defined by both
+ *                      X/Open or POSIX or in the negative, when neither
+ *                      X/Open or POSIX defines a symbol.
+ *
+ * _STRICT_STDC         __STDC__ is specified by the C Standards and defined
+ *                      by the compiler. For Sun compilers the value of
+ *                      __STDC__ is either 1, 0, or not defined based on the
+ *                      compilation mode (see cc(1)). When the value of
+ *                      __STDC__ is 1 and in the absence of any other feature
+ *                      test macros, the namespace available to the application
+ *                      is limited to only those symbols defined by the C
+ *                      Standard. _STRICT_STDC provides a more readable means
+ *                      of identifying symbols defined by the standard, or in
+ *                      the negative, symbols that are extensions to the C
+ *                      Standard. See additional comments for GNU C differences.
+ *
+ * _STDC_C99            __STDC_VERSION__ is specified by the C standards and
+ *                      defined by the compiler and indicates the version of
+ *                      the C standard. A value of 199901L indicates a
+ *                      compiler that complies with ISO/IEC 9899:1999, other-
+ *                      wise known as the C99 standard.
+ */
+
+#if defined(_XOPEN_SOURCE) || defined(_POSIX_C_SOURCE)
+#define	__XOPEN_OR_POSIX
+#endif
+
+/*
+ * ISO/IEC 9899:1990 and it's revision, ISO/IEC 9899:1999 specify the
+ * following predefined macro name:
+ *
+ * __STDC__	The integer constant 1, intended to indicate a conforming
+ *		implementation.
+ *
+ * Furthermore, a strictly conforming program shall use only those features
+ * of the language and library specified in these standards. A conforming
+ * implementation shall accept any strictly conforming program.
+ *
+ * Based on these requirements, Sun's C compiler defines __STDC__ to 1 for
+ * strictly conforming environments and __STDC__ to 0 for environments that
+ * use ANSI C semantics but allow extensions to the C standard. For non-ANSI
+ * C semantics, Sun's C compiler does not define __STDC__.
+ *
+ * The GNU C project interpretation is that __STDC__ should always be defined
+ * to 1 for compilation modes that accept ANSI C syntax regardless of whether
+ * or not extensions to the C standard are used. Violations of conforming
+ * behavior are conditionally flagged as warnings via the use of the
+ * -pedantic option. In addition to defining __STDC__ to 1, the GNU C
+ * compiler also defines __STRICT_ANSI__ as a means of specifying strictly
+ * conforming environments using the -ansi or -std=<standard> options.
+ *
+ * In the absence of any other compiler options, Sun and GNU set the value
+ * of __STDC__ as follows when using the following options:
+ *
+ *				Value of __STDC__  __STRICT_ANSI__
+ *
+ * cc -Xa (default)			0	      undefined
+ * cc -Xt (transitional)		0             undefined
+ * cc -Xc (strictly conforming)		1	      undefined
+ * cc -Xs (K&R C)		    undefined	      undefined
+ *
+ * gcc (default)			1	      undefined
+ * gcc -ansi, -std={c89, c99,...)  	1              defined
+ * gcc -traditional (K&R)	    undefined	      undefined
+ *
+ * The default compilation modes for Sun C compilers versus GNU C compilers
+ * results in a differing value for __STDC__ which results in a more
+ * restricted namespace when using Sun compilers. To allow both GNU and Sun
+ * interpretations to peacefully co-exist, we use the following Sun
+ * implementation _STRICT_STDC_ macro:
+ */
+
+#if (__STDC__ - 0 == 1 && !defined(__GNUC__)) || \
+	(defined(__GNUC__) && defined(__STRICT_ANSI__))
+#define	_STRICT_STDC
+#else
+#undef	_STRICT_STDC
+#endif
+
+/*
+ * Compiler complies with ISO/IEC 9899:1999
+ */
+
+#if __STDC_VERSION__ - 0 >= 199901L
+#define	_STDC_C99
+#endif
+
+/*
+ * Large file interfaces:
+ *
+ *	_LARGEFILE_SOURCE
+ *		1		large file-related additions to POSIX
+ *				interfaces requested (fseeko, etc.)
+ *	_LARGEFILE64_SOURCE
+ *		1		transitional large-file-related interfaces
+ *				requested (seek64, stat64, etc.)
+ *
+ * The corresponding announcement macros are respectively:
+ *	_LFS_LARGEFILE
+ *	_LFS64_LARGEFILE
+ * (These are set in <unistd.h>.)
+ *
+ * Requesting _LARGEFILE64_SOURCE implies requesting _LARGEFILE_SOURCE as
+ * well.
+ *
+ * The large file interfaces are made visible regardless of the initial values
+ * of the feature test macros under certain circumstances:
+ *    -	If no explicit standards-conforming environment is requested (neither
+ *	of _POSIX_SOURCE nor _XOPEN_SOURCE is defined and the value of
+ *	__STDC__ does not imply standards conformance).
+ *    -	Extended system interfaces are explicitly requested (__EXTENSIONS__
+ * 	is defined).
+ *    -	Access to in-kernel interfaces is requested (_KERNEL or _KMEMUSER is
+ *	defined).  (Note that this dependency is an artifact of the current
+ *	kernel implementation and may change in future releases.)
+ */
+#if	(!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
+		defined(_KERNEL) || defined(_KMEMUSER) || \
+		defined(__EXTENSIONS__)
+#undef	_LARGEFILE64_SOURCE
+#define	_LARGEFILE64_SOURCE	1
+#endif
+#if	_LARGEFILE64_SOURCE - 0 == 1
+#undef	_LARGEFILE_SOURCE
+#define	_LARGEFILE_SOURCE	1
+#endif
+
+/*
+ * Large file compilation environment control:
+ *
+ * The setting of _FILE_OFFSET_BITS controls the size of various file-related
+ * types and governs the mapping between file-related source function symbol
+ * names and the corresponding binary entry points.
+ *
+ * In the 32-bit environment, the default value is 32; if not set, set it to
+ * the default here, to simplify tests in other headers.
+ *
+ * In the 64-bit compilation environment, the only value allowed is 64.
+ */
+#if defined(_LP64)
+#ifndef _FILE_OFFSET_BITS
+#define	_FILE_OFFSET_BITS	64
+#endif
+#if	_FILE_OFFSET_BITS - 0 != 64
+#error	"invalid _FILE_OFFSET_BITS value specified"
+#endif
+#else	/* _LP64 */
+#ifndef	_FILE_OFFSET_BITS
+#define	_FILE_OFFSET_BITS	32
+#endif
+#if	_FILE_OFFSET_BITS - 0 != 32 && _FILE_OFFSET_BITS - 0 != 64
+#error	"invalid _FILE_OFFSET_BITS value specified"
+#endif
+#endif	/* _LP64 */
+
+/*
+ * Use of _XOPEN_SOURCE
+ *
+ * The following X/Open specifications are supported:
+ *
+ * X/Open Portability Guide, Issue 3 (XPG3)
+ * X/Open CAE Specification, Issue 4 (XPG4)
+ * X/Open CAE Specification, Issue 4, Version 2 (XPG4v2)
+ * X/Open CAE Specification, Issue 5 (XPG5)
+ * Open Group Technical Standard, Issue 6 (XPG6), also referred to as
+ *    IEEE Std. 1003.1-2001 and ISO/IEC 9945:2002.
+ *
+ * XPG4v2 is also referred to as UNIX 95 (SUS or SUSv1).
+ * XPG5 is also referred to as UNIX 98 or the Single Unix Specification,
+ *     Version 2 (SUSv2)
+ * XPG6 is the result of a merge of the X/Open and POSIX specifications
+ *     and as such is also referred to as IEEE Std. 1003.1-2001 in
+ *     addition to UNIX 03 and SUSv3.
+ *
+ * When writing a conforming X/Open application, as per the specification
+ * requirements, the appropriate feature test macros must be defined at
+ * compile time. These are as follows. For more info, see standards(5).
+ *
+ * Feature Test Macro				     Specification
+ * ------------------------------------------------  -------------
+ * _XOPEN_SOURCE                                         XPG3
+ * _XOPEN_SOURCE && _XOPEN_VERSION = 4                   XPG4
+ * _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED = 1           XPG4v2
+ * _XOPEN_SOURCE = 500                                   XPG5
+ * _XOPEN_SOURCE = 600  (or POSIX_C_SOURCE=200112L)      XPG6
+ *
+ * In order to simplify the guards within the headers, the following
+ * implementation private test macros have been created. Applications
+ * must NOT use these private test macros as unexpected results will
+ * occur.
+ *
+ * Note that in general, the use of these private macros is cumulative.
+ * For example, the use of _XPG3 with no other restrictions on the X/Open
+ * namespace will make the symbols visible for XPG3 through XPG6
+ * compilation environments. The use of _XPG4_2 with no other X/Open
+ * namespace restrictions indicates that the symbols were introduced in
+ * XPG4v2 and are therefore visible for XPG4v2 through XPG6 compilation
+ * environments, but not for XPG3 or XPG4 compilation environments.
+ *
+ * _XPG3    X/Open Portability Guide, Issue 3 (XPG3)
+ * _XPG4    X/Open CAE Specification, Issue 4 (XPG4)
+ * _XPG4_2  X/Open CAE Specification, Issue 4, Version 2 (XPG4v2/UNIX 95/SUS)
+ * _XPG5    X/Open CAE Specification, Issue 5 (XPG5/UNIX 98/SUSv2)
+ * _XPG6    Open Group Technical Standard, Issue 6 (XPG6/UNIX 03/SUSv3)
+ */
+
+/* X/Open Portability Guide, Issue 3 */
+#if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE - 0 < 500) && \
+	(_XOPEN_VERSION - 0 < 4) && !defined(_XOPEN_SOURCE_EXTENDED)
+#define	_XPG3
+/* X/Open CAE Specification, Issue 4 */
+#elif	(defined(_XOPEN_SOURCE) && _XOPEN_VERSION - 0 == 4)
+#define	_XPG4
+#define	_XPG3
+/* X/Open CAE Specification, Issue 4, Version 2 */
+#elif (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE_EXTENDED - 0 == 1)
+#define	_XPG4_2
+#define	_XPG4
+#define	_XPG3
+/* X/Open CAE Specification, Issue 5 */
+#elif	(_XOPEN_SOURCE - 0 == 500)
+#define	_XPG5
+#define	_XPG4_2
+#define	_XPG4
+#define	_XPG3
+#undef	_POSIX_C_SOURCE
+#define	_POSIX_C_SOURCE			199506L
+/* Open Group Technical Standard , Issue 6 */
+#elif	(_XOPEN_SOURCE - 0 == 600) || (_POSIX_C_SOURCE - 0 == 200112L)
+#define	_XPG6
+#define	_XPG5
+#define	_XPG4_2
+#define	_XPG4
+#define	_XPG3
+#undef	_POSIX_C_SOURCE
+#define	_POSIX_C_SOURCE			200112L
+#undef	_XOPEN_SOURCE
+#define	_XOPEN_SOURCE			600
+#endif
+
+/*
+ * _XOPEN_VERSION is defined by the X/Open specifications and is not
+ * normally defined by the application, except in the case of an XPG4
+ * application.  On the implementation side, _XOPEN_VERSION defined with
+ * the value of 3 indicates an XPG3 application. _XOPEN_VERSION defined
+ * with the value of 4 indicates an XPG4 or XPG4v2 (UNIX 95) application.
+ * _XOPEN_VERSION  defined with a value of 500 indicates an XPG5 (UNIX 98)
+ * application and with a value of 600 indicates an XPG6 (UNIX 03)
+ * application.  The appropriate version is determined by the use of the
+ * feature test macros described earlier.  The value of _XOPEN_VERSION
+ * defaults to 3 otherwise indicating support for XPG3 applications.
+ */
+#ifndef _XOPEN_VERSION
+#ifdef	_XPG6
+#define	_XOPEN_VERSION 600
+#elif defined(_XPG5)
+#define	_XOPEN_VERSION 500
+#elif	defined(_XPG4_2)
+#define	_XOPEN_VERSION  4
+#else
+#define	_XOPEN_VERSION  3
+#endif
+#endif
+
+/*
+ * ANSI C and ISO 9899:1990 say the type long long doesn't exist in strictly
+ * conforming environments.  ISO 9899:1999 says it does.
+ *
+ * The presence of _LONGLONG_TYPE says "long long exists" which is therefore
+ * defined in all but strictly conforming environments that disallow it.
+ */
+#if !defined(_STDC_C99) && defined(_STRICT_STDC) && !defined(__GNUC__)
+/*
+ * Resist attempts to force the definition of long long in this case.
+ */
+#if defined(_LONGLONG_TYPE)
+#error	"No long long in strictly conforming ANSI C & 1990 ISO C environments"
+#endif
+#else
+#if !defined(_LONGLONG_TYPE)
+#define	_LONGLONG_TYPE
+#endif
+#endif
+
+/*
+ * It is invalid to compile an XPG3, XPG4, XPG4v2, or XPG5 application
+ * using c99.  The same is true for POSIX.1-1990, POSIX.2-1992, POSIX.1b,
+ * and POSIX.1c applications. Likewise, it is invalid to compile an XPG6
+ * or a POSIX.1-2001 application with anything other than a c99 or later
+ * compiler.  Therefore, we force an error in both cases.
+ */
+#if defined(_STDC_C99) && (defined(__XOPEN_OR_POSIX) && !defined(_XPG6))
+#error "Compiler or options invalid for pre-UNIX 03 X/Open applications \
+	and pre-2001 POSIX applications"
+#elif !defined(_STDC_C99) && \
+	(defined(__XOPEN_OR_POSIX) && defined(_XPG6))
+#error "Compiler or options invalid; UNIX 03 and POSIX.1-2001 applications \
+	require the use of c99"
+#endif
+
+/*
+ * The following macro defines a value for the ISO C99 restrict
+ * keyword so that _RESTRICT_KYWD resolves to "restrict" if
+ * an ISO C99 compiler is used and "" (null string) if any other
+ * compiler is used. This allows for the use of single prototype
+ * declarations regardless of compiler version.
+ */
+#if (defined(__STDC__) && defined(_STDC_C99))
+#define	_RESTRICT_KYWD	restrict
+#else
+#define	_RESTRICT_KYWD
+#endif
+
+/*
+ * The following macro indicates header support for the ANSI C++
+ * standard.  The ISO/IEC designation for this is ISO/IEC FDIS 14882.
+ */
+#define	_ISO_CPP_14882_1998
+
+/*
+ * The following macro indicates header support for the C99 standard,
+ * ISO/IEC 9899:1999, Programming Languages - C.
+ */
+#define	_ISO_C_9899_1999
+
+/*
+ * The following macro indicates header support for DTrace. The value is an
+ * integer that corresponds to the major version number for DTrace.
+ */
+#define	_DTRACE_VERSION	1
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_FEATURE_TESTS_H */
diff --git a/uts/common/sys/fm/fs/zfs.h b/uts/common/sys/fm/fs/zfs.h
new file mode 100644
index 000000000000..c752edc99bbd
--- /dev/null
+++ b/uts/common/sys/fm/fs/zfs.h
@@ -0,0 +1,96 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_FM_FS_ZFS_H
+#define	_SYS_FM_FS_ZFS_H
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#define	ZFS_ERROR_CLASS				"fs.zfs"
+
+#define	FM_EREPORT_ZFS_CHECKSUM			"checksum"
+#define	FM_EREPORT_ZFS_IO			"io"
+#define	FM_EREPORT_ZFS_DATA			"data"
+#define	FM_EREPORT_ZFS_POOL			"zpool"
+#define	FM_EREPORT_ZFS_DEVICE_UNKNOWN		"vdev.unknown"
+#define	FM_EREPORT_ZFS_DEVICE_OPEN_FAILED	"vdev.open_failed"
+#define	FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA	"vdev.corrupt_data"
+#define	FM_EREPORT_ZFS_DEVICE_NO_REPLICAS	"vdev.no_replicas"
+#define	FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM	"vdev.bad_guid_sum"
+#define	FM_EREPORT_ZFS_DEVICE_TOO_SMALL		"vdev.too_small"
+#define	FM_EREPORT_ZFS_DEVICE_BAD_LABEL		"vdev.bad_label"
+#define	FM_EREPORT_ZFS_IO_FAILURE		"io_failure"
+#define	FM_EREPORT_ZFS_PROBE_FAILURE		"probe_failure"
+#define	FM_EREPORT_ZFS_LOG_REPLAY		"log_replay"
+
+#define	FM_EREPORT_PAYLOAD_ZFS_POOL		"pool"
+#define	FM_EREPORT_PAYLOAD_ZFS_POOL_FAILMODE	"pool_failmode"
+#define	FM_EREPORT_PAYLOAD_ZFS_POOL_GUID	"pool_guid"
+#define	FM_EREPORT_PAYLOAD_ZFS_POOL_CONTEXT	"pool_context"
+#define	FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID	"vdev_guid"
+#define	FM_EREPORT_PAYLOAD_ZFS_VDEV_TYPE	"vdev_type"
+#define	FM_EREPORT_PAYLOAD_ZFS_VDEV_PATH	"vdev_path"
+#define	FM_EREPORT_PAYLOAD_ZFS_VDEV_DEVID	"vdev_devid"
+#define	FM_EREPORT_PAYLOAD_ZFS_VDEV_FRU		"vdev_fru"
+#define	FM_EREPORT_PAYLOAD_ZFS_PARENT_GUID	"parent_guid"
+#define	FM_EREPORT_PAYLOAD_ZFS_PARENT_TYPE	"parent_type"
+#define	FM_EREPORT_PAYLOAD_ZFS_PARENT_PATH	"parent_path"
+#define	FM_EREPORT_PAYLOAD_ZFS_PARENT_DEVID	"parent_devid"
+#define	FM_EREPORT_PAYLOAD_ZFS_ZIO_OBJSET	"zio_objset"
+#define	FM_EREPORT_PAYLOAD_ZFS_ZIO_OBJECT	"zio_object"
+#define	FM_EREPORT_PAYLOAD_ZFS_ZIO_LEVEL	"zio_level"
+#define	FM_EREPORT_PAYLOAD_ZFS_ZIO_BLKID	"zio_blkid"
+#define	FM_EREPORT_PAYLOAD_ZFS_ZIO_ERR		"zio_err"
+#define	FM_EREPORT_PAYLOAD_ZFS_ZIO_OFFSET	"zio_offset"
+#define	FM_EREPORT_PAYLOAD_ZFS_ZIO_SIZE		"zio_size"
+#define	FM_EREPORT_PAYLOAD_ZFS_PREV_STATE	"prev_state"
+#define	FM_EREPORT_PAYLOAD_ZFS_CKSUM_EXPECTED	"cksum_expected"
+#define	FM_EREPORT_PAYLOAD_ZFS_CKSUM_ACTUAL	"cksum_actual"
+#define	FM_EREPORT_PAYLOAD_ZFS_CKSUM_ALGO	"cksum_algorithm"
+#define	FM_EREPORT_PAYLOAD_ZFS_CKSUM_BYTESWAP	"cksum_byteswap"
+#define	FM_EREPORT_PAYLOAD_ZFS_BAD_OFFSET_RANGES "bad_ranges"
+#define	FM_EREPORT_PAYLOAD_ZFS_BAD_RANGE_MIN_GAP "bad_ranges_min_gap"
+#define	FM_EREPORT_PAYLOAD_ZFS_BAD_RANGE_SETS	"bad_range_sets"
+#define	FM_EREPORT_PAYLOAD_ZFS_BAD_RANGE_CLEARS	"bad_range_clears"
+#define	FM_EREPORT_PAYLOAD_ZFS_BAD_SET_BITS	"bad_set_bits"
+#define	FM_EREPORT_PAYLOAD_ZFS_BAD_CLEARED_BITS	"bad_cleared_bits"
+#define	FM_EREPORT_PAYLOAD_ZFS_BAD_SET_HISTOGRAM "bad_set_histogram"
+#define	FM_EREPORT_PAYLOAD_ZFS_BAD_CLEARED_HISTOGRAM "bad_cleared_histogram"
+
+#define	FM_EREPORT_FAILMODE_WAIT		"wait"
+#define	FM_EREPORT_FAILMODE_CONTINUE		"continue"
+#define	FM_EREPORT_FAILMODE_PANIC		"panic"
+
+#define	FM_RESOURCE_REMOVED			"removed"
+#define	FM_RESOURCE_AUTOREPLACE			"autoreplace"
+#define	FM_RESOURCE_STATECHANGE			"statechange"
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_FM_FS_ZFS_H */
diff --git a/uts/common/sys/fm/protocol.h b/uts/common/sys/fm/protocol.h
new file mode 100644
index 000000000000..5eca760dadc5
--- /dev/null
+++ b/uts/common/sys/fm/protocol.h
@@ -0,0 +1,371 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_FM_PROTOCOL_H
+#define	_SYS_FM_PROTOCOL_H
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#ifdef _KERNEL
+#include <sys/varargs.h>
+#include <sys/nvpair.h>
+#else
+#include <libnvpair.h>
+#include <stdarg.h>
+#endif
+#include <sys/processor.h>
+
+/* FM common member names */
+#define	FM_CLASS			"class"
+#define	FM_VERSION			"version"
+
+/* FM protocol category 1 class names */
+#define	FM_EREPORT_CLASS		"ereport"
+#define	FM_FAULT_CLASS			"fault"
+#define	FM_DEFECT_CLASS			"defect"
+#define	FM_RSRC_CLASS			"resource"
+#define	FM_LIST_EVENT			"list"
+#define	FM_IREPORT_CLASS		"ireport"
+
+/* FM list.* event class values */
+#define	FM_LIST_SUSPECT_CLASS		FM_LIST_EVENT ".suspect"
+#define	FM_LIST_ISOLATED_CLASS		FM_LIST_EVENT ".isolated"
+#define	FM_LIST_REPAIRED_CLASS		FM_LIST_EVENT ".repaired"
+#define	FM_LIST_UPDATED_CLASS		FM_LIST_EVENT ".updated"
+#define	FM_LIST_RESOLVED_CLASS		FM_LIST_EVENT ".resolved"
+
+/* ereport class subcategory values */
+#define	FM_ERROR_CPU			"cpu"
+#define	FM_ERROR_IO			"io"
+
+/* ereport version and payload member names */
+#define	FM_EREPORT_VERS0		0
+#define	FM_EREPORT_VERSION		FM_EREPORT_VERS0
+
+/* ereport payload member names */
+#define	FM_EREPORT_DETECTOR		"detector"
+#define	FM_EREPORT_ENA			"ena"
+
+/* list.* event payload member names */
+#define	FM_LIST_EVENT_SIZE		"list-sz"
+
+/* ireport.* event payload member names */
+#define	FM_IREPORT_DETECTOR		"detector"
+#define	FM_IREPORT_UUID			"uuid"
+#define	FM_IREPORT_PRIORITY		"pri"
+#define	FM_IREPORT_ATTRIBUTES		"attr"
+
+/*
+ * list.suspect, isolated, updated, repaired and resolved
+ * versions/payload member names.
+ */
+#define	FM_SUSPECT_UUID			"uuid"
+#define	FM_SUSPECT_DIAG_CODE		"code"
+#define	FM_SUSPECT_DIAG_TIME		"diag-time"
+#define	FM_SUSPECT_DE			"de"
+#define	FM_SUSPECT_FAULT_LIST		"fault-list"
+#define	FM_SUSPECT_FAULT_SZ		"fault-list-sz"
+#define	FM_SUSPECT_FAULT_STATUS		"fault-status"
+#define	FM_SUSPECT_INJECTED		"__injected"
+#define	FM_SUSPECT_MESSAGE		"message"
+#define	FM_SUSPECT_RETIRE		"retire"
+#define	FM_SUSPECT_RESPONSE		"response"
+#define	FM_SUSPECT_SEVERITY		"severity"
+
+#define	FM_SUSPECT_VERS0		0
+#define	FM_SUSPECT_VERSION		FM_SUSPECT_VERS0
+
+#define	FM_SUSPECT_FAULTY		0x1
+#define	FM_SUSPECT_UNUSABLE		0x2
+#define	FM_SUSPECT_NOT_PRESENT		0x4
+#define	FM_SUSPECT_DEGRADED		0x8
+#define	FM_SUSPECT_REPAIRED		0x10
+#define	FM_SUSPECT_REPLACED		0x20
+#define	FM_SUSPECT_ACQUITTED		0x40
+
+/* fault event versions and payload member names */
+#define	FM_FAULT_VERS0			0
+#define	FM_FAULT_VERSION		FM_FAULT_VERS0
+
+#define	FM_FAULT_ASRU			"asru"
+#define	FM_FAULT_FRU			"fru"
+#define	FM_FAULT_FRU_LABEL		"fru-label"
+#define	FM_FAULT_CERTAINTY		"certainty"
+#define	FM_FAULT_RESOURCE		"resource"
+#define	FM_FAULT_LOCATION		"location"
+
+/* resource event versions and payload member names */
+#define	FM_RSRC_VERS0			0
+#define	FM_RSRC_VERSION			FM_RSRC_VERS0
+#define	FM_RSRC_RESOURCE		"resource"
+
+/* resource.fm.asru.* payload member names */
+#define	FM_RSRC_ASRU_UUID		"uuid"
+#define	FM_RSRC_ASRU_CODE		"code"
+#define	FM_RSRC_ASRU_FAULTY		"faulty"
+#define	FM_RSRC_ASRU_REPAIRED		"repaired"
+#define	FM_RSRC_ASRU_REPLACED		"replaced"
+#define	FM_RSRC_ASRU_ACQUITTED		"acquitted"
+#define	FM_RSRC_ASRU_RESOLVED		"resolved"
+#define	FM_RSRC_ASRU_UNUSABLE		"unusable"
+#define	FM_RSRC_ASRU_EVENT		"event"
+
+/* resource.fm.xprt.* versions and payload member names */
+#define	FM_RSRC_XPRT_VERS0		0
+#define	FM_RSRC_XPRT_VERSION		FM_RSRC_XPRT_VERS0
+#define	FM_RSRC_XPRT_UUID		"uuid"
+#define	FM_RSRC_XPRT_SUBCLASS		"subclass"
+#define	FM_RSRC_XPRT_FAULT_STATUS	"fault-status"
+#define	FM_RSRC_XPRT_FAULT_HAS_ASRU	"fault-has-asru"
+
+/*
+ * FM ENA Format Macros
+ */
+#define	ENA_FORMAT_MASK			0x3
+#define	ENA_FORMAT(ena)			((ena) & ENA_FORMAT_MASK)
+
+/* ENA format types */
+#define	FM_ENA_FMT0			0
+#define	FM_ENA_FMT1			1
+#define	FM_ENA_FMT2			2
+
+/* Format 1 */
+#define	ENA_FMT1_GEN_MASK		0x00000000000003FCull
+#define	ENA_FMT1_ID_MASK		0xFFFFFFFFFFFFFC00ull
+#define	ENA_FMT1_CPUID_MASK		0x00000000000FFC00ull
+#define	ENA_FMT1_TIME_MASK		0xFFFFFFFFFFF00000ull
+#define	ENA_FMT1_GEN_SHFT		2
+#define	ENA_FMT1_ID_SHFT		10
+#define	ENA_FMT1_CPUID_SHFT		ENA_FMT1_ID_SHFT
+#define	ENA_FMT1_TIME_SHFT		20
+
+/* Format 2 */
+#define	ENA_FMT2_GEN_MASK		0x00000000000003FCull
+#define	ENA_FMT2_ID_MASK		0xFFFFFFFFFFFFFC00ull
+#define	ENA_FMT2_TIME_MASK		ENA_FMT2_ID_MASK
+#define	ENA_FMT2_GEN_SHFT		2
+#define	ENA_FMT2_ID_SHFT		10
+#define	ENA_FMT2_TIME_SHFT		ENA_FMT2_ID_SHFT
+
+/* Common FMRI type names */
+#define	FM_FMRI_AUTHORITY		"authority"
+#define	FM_FMRI_SCHEME			"scheme"
+#define	FM_FMRI_SVC_AUTHORITY		"svc-authority"
+#define	FM_FMRI_FACILITY		"facility"
+
+/* FMRI authority-type member names */
+#define	FM_FMRI_AUTH_CHASSIS		"chassis-id"
+#define	FM_FMRI_AUTH_PRODUCT_SN		"product-sn"
+#define	FM_FMRI_AUTH_PRODUCT		"product-id"
+#define	FM_FMRI_AUTH_DOMAIN		"domain-id"
+#define	FM_FMRI_AUTH_SERVER		"server-id"
+#define	FM_FMRI_AUTH_HOST		"host-id"
+
+#define	FM_AUTH_VERS0			0
+#define	FM_FMRI_AUTH_VERSION		FM_AUTH_VERS0
+
+/* scheme name values */
+#define	FM_FMRI_SCHEME_FMD		"fmd"
+#define	FM_FMRI_SCHEME_DEV		"dev"
+#define	FM_FMRI_SCHEME_HC		"hc"
+#define	FM_FMRI_SCHEME_SVC		"svc"
+#define	FM_FMRI_SCHEME_CPU		"cpu"
+#define	FM_FMRI_SCHEME_MEM		"mem"
+#define	FM_FMRI_SCHEME_MOD		"mod"
+#define	FM_FMRI_SCHEME_PKG		"pkg"
+#define	FM_FMRI_SCHEME_LEGACY		"legacy-hc"
+#define	FM_FMRI_SCHEME_ZFS		"zfs"
+#define	FM_FMRI_SCHEME_SW		"sw"
+
+/* Scheme versions */
+#define	FMD_SCHEME_VERSION0		0
+#define	FM_FMD_SCHEME_VERSION		FMD_SCHEME_VERSION0
+#define	DEV_SCHEME_VERSION0		0
+#define	FM_DEV_SCHEME_VERSION		DEV_SCHEME_VERSION0
+#define	FM_HC_VERS0			0
+#define	FM_HC_SCHEME_VERSION		FM_HC_VERS0
+#define	CPU_SCHEME_VERSION0		0
+#define	CPU_SCHEME_VERSION1		1
+#define	FM_CPU_SCHEME_VERSION		CPU_SCHEME_VERSION1
+#define	MEM_SCHEME_VERSION0		0
+#define	FM_MEM_SCHEME_VERSION		MEM_SCHEME_VERSION0
+#define	MOD_SCHEME_VERSION0		0
+#define	FM_MOD_SCHEME_VERSION		MOD_SCHEME_VERSION0
+#define	PKG_SCHEME_VERSION0		0
+#define	FM_PKG_SCHEME_VERSION		PKG_SCHEME_VERSION0
+#define	LEGACY_SCHEME_VERSION0		0
+#define	FM_LEGACY_SCHEME_VERSION	LEGACY_SCHEME_VERSION0
+#define	SVC_SCHEME_VERSION0		0
+#define	FM_SVC_SCHEME_VERSION		SVC_SCHEME_VERSION0
+#define	ZFS_SCHEME_VERSION0		0
+#define	FM_ZFS_SCHEME_VERSION		ZFS_SCHEME_VERSION0
+#define	SW_SCHEME_VERSION0		0
+#define	FM_SW_SCHEME_VERSION		SW_SCHEME_VERSION0
+
+/* hc scheme member names */
+#define	FM_FMRI_HC_SERIAL_ID		"serial"
+#define	FM_FMRI_HC_PART			"part"
+#define	FM_FMRI_HC_REVISION		"revision"
+#define	FM_FMRI_HC_ROOT			"hc-root"
+#define	FM_FMRI_HC_LIST_SZ		"hc-list-sz"
+#define	FM_FMRI_HC_LIST			"hc-list"
+#define	FM_FMRI_HC_SPECIFIC		"hc-specific"
+
+/* facility member names */
+#define	FM_FMRI_FACILITY_NAME		"facility-name"
+#define	FM_FMRI_FACILITY_TYPE		"facility-type"
+
+/* hc-list version and member names */
+#define	FM_FMRI_HC_NAME			"hc-name"
+#define	FM_FMRI_HC_ID			"hc-id"
+
+#define	HC_LIST_VERSION0		0
+#define	FM_HC_LIST_VERSION		HC_LIST_VERSION0
+
+/* hc-specific member names */
+#define	FM_FMRI_HC_SPECIFIC_OFFSET	"offset"
+#define	FM_FMRI_HC_SPECIFIC_PHYSADDR	"physaddr"
+
+/* fmd module scheme member names */
+#define	FM_FMRI_FMD_NAME		"mod-name"
+#define	FM_FMRI_FMD_VERSION		"mod-version"
+
+/* dev scheme member names */
+#define	FM_FMRI_DEV_ID			"devid"
+#define	FM_FMRI_DEV_TGTPTLUN0		"target-port-l0id"
+#define	FM_FMRI_DEV_PATH		"device-path"
+
+/* pkg scheme member names */
+#define	FM_FMRI_PKG_BASEDIR		"pkg-basedir"
+#define	FM_FMRI_PKG_INST		"pkg-inst"
+#define	FM_FMRI_PKG_VERSION		"pkg-version"
+
+/* svc scheme member names */
+#define	FM_FMRI_SVC_NAME		"svc-name"
+#define	FM_FMRI_SVC_INSTANCE		"svc-instance"
+#define	FM_FMRI_SVC_CONTRACT_ID		"svc-contract-id"
+
+/* svc-authority member names */
+#define	FM_FMRI_SVC_AUTH_SCOPE		"scope"
+#define	FM_FMRI_SVC_AUTH_SYSTEM_FQN	"system-fqn"
+
+/* cpu scheme member names */
+#define	FM_FMRI_CPU_ID			"cpuid"
+#define	FM_FMRI_CPU_SERIAL_ID		"serial"
+#define	FM_FMRI_CPU_MASK		"cpumask"
+#define	FM_FMRI_CPU_VID			"cpuvid"
+#define	FM_FMRI_CPU_CPUFRU		"cpufru"
+#define	FM_FMRI_CPU_CACHE_INDEX		"cacheindex"
+#define	FM_FMRI_CPU_CACHE_WAY		"cacheway"
+#define	FM_FMRI_CPU_CACHE_BIT		"cachebit"
+#define	FM_FMRI_CPU_CACHE_TYPE		"cachetype"
+
+#define	FM_FMRI_CPU_CACHE_TYPE_L2	0
+#define	FM_FMRI_CPU_CACHE_TYPE_L3	1
+
+/* legacy-hc scheme member names */
+#define	FM_FMRI_LEGACY_HC		"component"
+#define	FM_FMRI_LEGACY_HC_PREFIX	FM_FMRI_SCHEME_HC":///" \
+    FM_FMRI_LEGACY_HC"="
+
+/* mem scheme member names */
+#define	FM_FMRI_MEM_UNUM		"unum"
+#define	FM_FMRI_MEM_SERIAL_ID		"serial"
+#define	FM_FMRI_MEM_PHYSADDR		"physaddr"
+#define	FM_FMRI_MEM_MEMCONFIG		"memconfig"
+#define	FM_FMRI_MEM_OFFSET		"offset"
+
+/* mod scheme member names */
+#define	FM_FMRI_MOD_PKG			"mod-pkg"
+#define	FM_FMRI_MOD_NAME		"mod-name"
+#define	FM_FMRI_MOD_ID			"mod-id"
+#define	FM_FMRI_MOD_DESC		"mod-desc"
+
+/* zfs scheme member names */
+#define	FM_FMRI_ZFS_POOL		"pool"
+#define	FM_FMRI_ZFS_VDEV		"vdev"
+
+/* sw scheme member names - extra indentation for members of an nvlist */
+#define	FM_FMRI_SW_OBJ			"object"
+#define	FM_FMRI_SW_OBJ_PATH			"path"
+#define	FM_FMRI_SW_OBJ_ROOT			"root"
+#define	FM_FMRI_SW_OBJ_PKG			"pkg"
+#define	FM_FMRI_SW_SITE			"site"
+#define	FM_FMRI_SW_SITE_TOKEN			"token"
+#define	FM_FMRI_SW_SITE_MODULE			"module"
+#define	FM_FMRI_SW_SITE_FILE			"file"
+#define	FM_FMRI_SW_SITE_LINE			"line"
+#define	FM_FMRI_SW_SITE_FUNC			"func"
+#define	FM_FMRI_SW_CTXT			"context"
+#define	FM_FMRI_SW_CTXT_ORIGIN			"origin"
+#define	FM_FMRI_SW_CTXT_EXECNAME		"execname"
+#define	FM_FMRI_SW_CTXT_PID			"pid"
+#define	FM_FMRI_SW_CTXT_ZONE			"zone"
+#define	FM_FMRI_SW_CTXT_CTID			"ctid"
+#define	FM_FMRI_SW_CTXT_STACK			"stack"
+
+extern nv_alloc_t *fm_nva_xcreate(char *, size_t);
+extern void fm_nva_xdestroy(nv_alloc_t *);
+
+extern nvlist_t *fm_nvlist_create(nv_alloc_t *);
+extern void fm_nvlist_destroy(nvlist_t *, int);
+
+#define	FM_NVA_FREE	0		/* free allocator on nvlist_destroy */
+#define	FM_NVA_RETAIN	1		/* keep allocator on nvlist_destroy */
+
+extern void fm_ereport_set(nvlist_t *, int, const char *, uint64_t,
+    const nvlist_t *, ...);
+extern void fm_payload_set(nvlist_t *, ...);
+extern int i_fm_payload_set(nvlist_t *, const char *, va_list);
+extern void fm_fmri_hc_set(nvlist_t *, int, const nvlist_t *, nvlist_t *,
+    int, ...);
+extern void fm_fmri_dev_set(nvlist_t *, int, const nvlist_t *, const char *,
+    const char *, const char *);
+extern void fm_fmri_de_set(nvlist_t *, int, const nvlist_t *, const char *);
+extern void fm_fmri_cpu_set(nvlist_t *, int, const nvlist_t *, uint32_t,
+    uint8_t *, const char *);
+extern void fm_fmri_mem_set(nvlist_t *, int, const nvlist_t *, const char *,
+    const char *, uint64_t);
+extern void fm_authority_set(nvlist_t *, int, const char *, const char *,
+    const char *, const char *);
+extern void fm_fmri_zfs_set(nvlist_t *, int, uint64_t, uint64_t);
+extern void fm_fmri_hc_create(nvlist_t *, int, const nvlist_t *, nvlist_t *,
+    nvlist_t *, int, ...);
+
+extern uint64_t fm_ena_increment(uint64_t);
+extern uint64_t fm_ena_generate(uint64_t, uchar_t);
+extern uint64_t fm_ena_generate_cpu(uint64_t, processorid_t, uchar_t);
+extern uint64_t fm_ena_generation_get(uint64_t);
+extern uchar_t fm_ena_format_get(uint64_t);
+extern uint64_t fm_ena_id_get(uint64_t);
+extern uint64_t fm_ena_time_get(uint64_t);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_FM_PROTOCOL_H */
diff --git a/uts/common/sys/fm/util.h b/uts/common/sys/fm/util.h
new file mode 100644
index 000000000000..37334101b3cf
--- /dev/null
+++ b/uts/common/sys/fm/util.h
@@ -0,0 +1,103 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_FM_UTIL_H
+#define	_SYS_FM_UTIL_H
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#include <sys/nvpair.h>
+#include <sys/errorq.h>
+
+/*
+ * Shared user/kernel definitions for class length, error channel name,
+ * and kernel event publisher string.
+ */
+#define	FM_MAX_CLASS 100
+#define	FM_ERROR_CHAN	"com.sun:fm:error"
+#define	FM_PUB		"fm"
+
+/*
+ * ereport dump device transport support
+ *
+ * Ereports are written out to the dump device at a proscribed offset from the
+ * end, similar to in-transit log messages.  The ereports are represented as a
+ * erpt_dump_t header followed by ed_size bytes of packed native nvlist data.
+ *
+ * NOTE: All of these constants and the header must be defined so they have the
+ * same representation for *both* 32-bit and 64-bit producers and consumers.
+ */
+#define	ERPT_MAGIC	0xf00d4eddU
+#define	ERPT_MAX_ERRS	16
+#define	ERPT_DATA_SZ	(6 * 1024)
+#define	ERPT_EVCH_MAX	256
+#define	ERPT_HIWAT	64
+
+typedef struct erpt_dump {
+	uint32_t ed_magic;	/* ERPT_MAGIC or zero to indicate end */
+	uint32_t ed_chksum;	/* checksum32() of packed nvlist data */
+	uint32_t ed_size;	/* ereport (nvl) fixed buf size */
+	uint32_t ed_pad;	/* reserved for future use */
+	hrtime_t ed_hrt_nsec;	/* hrtime of this ereport */
+	hrtime_t ed_hrt_base;	/* hrtime sample corresponding to ed_tod_base */
+	struct {
+		uint64_t sec;	/* seconds since gettimeofday() Epoch */
+		uint64_t nsec;	/* nanoseconds past ed_tod_base.sec */
+	} ed_tod_base;
+} erpt_dump_t;
+
+#ifdef _KERNEL
+#include <sys/systm.h>
+
+#define	FM_STK_DEPTH	20	/* maximum stack depth */
+#define	FM_SYM_SZ	64	/* maximum symbol size */
+#define	FM_ERR_PIL	2	/* PIL for ereport_errorq drain processing */
+
+#define	FM_EREPORT_PAYLOAD_NAME_STACK		"stack"
+
+extern errorq_t *ereport_errorq;
+extern void *ereport_dumpbuf;
+extern size_t ereport_dumplen;
+
+extern void fm_init(void);
+extern void fm_nvprint(nvlist_t *);
+extern void fm_panic(const char *, ...);
+extern void fm_banner(void);
+
+extern void fm_ereport_dump(void);
+extern void fm_ereport_post(nvlist_t *, int);
+
+extern void fm_payload_stack_add(nvlist_t *, const pc_t *, int);
+
+extern int is_fm_panic();
+#endif  /* _KERNEL */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_FM_UTIL_H */
diff --git a/uts/common/sys/fs/zfs.h b/uts/common/sys/fs/zfs.h
new file mode 100644
index 000000000000..da0b12bab4a9
--- /dev/null
+++ b/uts/common/sys/fs/zfs.h
@@ -0,0 +1,912 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2010 Robert Milkowski */
+
+#ifndef	_SYS_FS_ZFS_H
+#define	_SYS_FS_ZFS_H
+
+#include <sys/time.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Types and constants shared between userland and the kernel.
+ */
+
+/*
+ * Each dataset can be one of the following types.  These constants can be
+ * combined into masks that can be passed to various functions.
+ */
+typedef enum {
+	ZFS_TYPE_FILESYSTEM	= 0x1,
+	ZFS_TYPE_SNAPSHOT	= 0x2,
+	ZFS_TYPE_VOLUME		= 0x4,
+	ZFS_TYPE_POOL		= 0x8
+} zfs_type_t;
+
+#define	ZFS_TYPE_DATASET	\
+	(ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME | ZFS_TYPE_SNAPSHOT)
+
+#define	ZAP_MAXNAMELEN 256
+#define	ZAP_MAXVALUELEN (1024 * 8)
+#define	ZAP_OLDMAXVALUELEN 1024
+
+/*
+ * Dataset properties are identified by these constants and must be added to
+ * the end of this list to ensure that external consumers are not affected
+ * by the change. If you make any changes to this list, be sure to update
+ * the property table in usr/src/common/zfs/zfs_prop.c.
+ */
+typedef enum {
+	ZFS_PROP_TYPE,
+	ZFS_PROP_CREATION,
+	ZFS_PROP_USED,
+	ZFS_PROP_AVAILABLE,
+	ZFS_PROP_REFERENCED,
+	ZFS_PROP_COMPRESSRATIO,
+	ZFS_PROP_MOUNTED,
+	ZFS_PROP_ORIGIN,
+	ZFS_PROP_QUOTA,
+	ZFS_PROP_RESERVATION,
+	ZFS_PROP_VOLSIZE,
+	ZFS_PROP_VOLBLOCKSIZE,
+	ZFS_PROP_RECORDSIZE,
+	ZFS_PROP_MOUNTPOINT,
+	ZFS_PROP_SHARENFS,
+	ZFS_PROP_CHECKSUM,
+	ZFS_PROP_COMPRESSION,
+	ZFS_PROP_ATIME,
+	ZFS_PROP_DEVICES,
+	ZFS_PROP_EXEC,
+	ZFS_PROP_SETUID,
+	ZFS_PROP_READONLY,
+	ZFS_PROP_ZONED,
+	ZFS_PROP_SNAPDIR,
+	ZFS_PROP_PRIVATE,		/* not exposed to user, temporary */
+	ZFS_PROP_ACLINHERIT,
+	ZFS_PROP_CREATETXG,		/* not exposed to the user */
+	ZFS_PROP_NAME,			/* not exposed to the user */
+	ZFS_PROP_CANMOUNT,
+	ZFS_PROP_ISCSIOPTIONS,		/* not exposed to the user */
+	ZFS_PROP_XATTR,
+	ZFS_PROP_NUMCLONES,		/* not exposed to the user */
+	ZFS_PROP_COPIES,
+	ZFS_PROP_VERSION,
+	ZFS_PROP_UTF8ONLY,
+	ZFS_PROP_NORMALIZE,
+	ZFS_PROP_CASE,
+	ZFS_PROP_VSCAN,
+	ZFS_PROP_NBMAND,
+	ZFS_PROP_SHARESMB,
+	ZFS_PROP_REFQUOTA,
+	ZFS_PROP_REFRESERVATION,
+	ZFS_PROP_GUID,
+	ZFS_PROP_PRIMARYCACHE,
+	ZFS_PROP_SECONDARYCACHE,
+	ZFS_PROP_USEDSNAP,
+	ZFS_PROP_USEDDS,
+	ZFS_PROP_USEDCHILD,
+	ZFS_PROP_USEDREFRESERV,
+	ZFS_PROP_USERACCOUNTING,	/* not exposed to the user */
+	ZFS_PROP_STMF_SHAREINFO,	/* not exposed to the user */
+	ZFS_PROP_DEFER_DESTROY,
+	ZFS_PROP_USERREFS,
+	ZFS_PROP_LOGBIAS,
+	ZFS_PROP_UNIQUE,		/* not exposed to the user */
+	ZFS_PROP_OBJSETID,		/* not exposed to the user */
+	ZFS_PROP_DEDUP,
+	ZFS_PROP_MLSLABEL,
+	ZFS_PROP_SYNC,
+	ZFS_NUM_PROPS
+} zfs_prop_t;
+
+typedef enum {
+	ZFS_PROP_USERUSED,
+	ZFS_PROP_USERQUOTA,
+	ZFS_PROP_GROUPUSED,
+	ZFS_PROP_GROUPQUOTA,
+	ZFS_NUM_USERQUOTA_PROPS
+} zfs_userquota_prop_t;
+
+extern const char *zfs_userquota_prop_prefixes[ZFS_NUM_USERQUOTA_PROPS];
+
+/*
+ * Pool properties are identified by these constants and must be added to the
+ * end of this list to ensure that external consumers are not affected
+ * by the change. If you make any changes to this list, be sure to update
+ * the property table in usr/src/common/zfs/zpool_prop.c.
+ */
+typedef enum {
+	ZPOOL_PROP_NAME,
+	ZPOOL_PROP_SIZE,
+	ZPOOL_PROP_CAPACITY,
+	ZPOOL_PROP_ALTROOT,
+	ZPOOL_PROP_HEALTH,
+	ZPOOL_PROP_GUID,
+	ZPOOL_PROP_VERSION,
+	ZPOOL_PROP_BOOTFS,
+	ZPOOL_PROP_DELEGATION,
+	ZPOOL_PROP_AUTOREPLACE,
+	ZPOOL_PROP_CACHEFILE,
+	ZPOOL_PROP_FAILUREMODE,
+	ZPOOL_PROP_LISTSNAPS,
+	ZPOOL_PROP_AUTOEXPAND,
+	ZPOOL_PROP_DEDUPDITTO,
+	ZPOOL_PROP_DEDUPRATIO,
+	ZPOOL_PROP_FREE,
+	ZPOOL_PROP_ALLOCATED,
+	ZPOOL_PROP_READONLY,
+	ZPOOL_NUM_PROPS
+} zpool_prop_t;
+
+#define	ZPROP_CONT		-2
+#define	ZPROP_INVAL		-1
+
+#define	ZPROP_VALUE		"value"
+#define	ZPROP_SOURCE		"source"
+
+typedef enum {
+	ZPROP_SRC_NONE = 0x1,
+	ZPROP_SRC_DEFAULT = 0x2,
+	ZPROP_SRC_TEMPORARY = 0x4,
+	ZPROP_SRC_LOCAL = 0x8,
+	ZPROP_SRC_INHERITED = 0x10,
+	ZPROP_SRC_RECEIVED = 0x20
+} zprop_source_t;
+
+#define	ZPROP_SRC_ALL	0x3f
+
+#define	ZPROP_SOURCE_VAL_RECVD	"$recvd"
+#define	ZPROP_N_MORE_ERRORS	"N_MORE_ERRORS"
+/*
+ * Dataset flag implemented as a special entry in the props zap object
+ * indicating that the dataset has received properties on or after
+ * SPA_VERSION_RECVD_PROPS. The first such receive blows away local properties
+ * just as it did in earlier versions, and thereafter, local properties are
+ * preserved.
+ */
+#define	ZPROP_HAS_RECVD		"$hasrecvd"
+
+typedef enum {
+	ZPROP_ERR_NOCLEAR = 0x1, /* failure to clear existing props */
+	ZPROP_ERR_NORESTORE = 0x2 /* failure to restore props on error */
+} zprop_errflags_t;
+
+typedef int (*zprop_func)(int, void *);
+
+/*
+ * Properties to be set on the root file system of a new pool
+ * are stuffed into their own nvlist, which is then included in
+ * the properties nvlist with the pool properties.
+ */
+#define	ZPOOL_ROOTFS_PROPS	"root-props-nvl"
+
+/*
+ * Dataset property functions shared between libzfs and kernel.
+ */
+const char *zfs_prop_default_string(zfs_prop_t);
+uint64_t zfs_prop_default_numeric(zfs_prop_t);
+boolean_t zfs_prop_readonly(zfs_prop_t);
+boolean_t zfs_prop_inheritable(zfs_prop_t);
+boolean_t zfs_prop_setonce(zfs_prop_t);
+const char *zfs_prop_to_name(zfs_prop_t);
+zfs_prop_t zfs_name_to_prop(const char *);
+boolean_t zfs_prop_user(const char *);
+boolean_t zfs_prop_userquota(const char *);
+int zfs_prop_index_to_string(zfs_prop_t, uint64_t, const char **);
+int zfs_prop_string_to_index(zfs_prop_t, const char *, uint64_t *);
+uint64_t zfs_prop_random_value(zfs_prop_t, uint64_t seed);
+boolean_t zfs_prop_valid_for_type(int, zfs_type_t);
+
+/*
+ * Pool property functions shared between libzfs and kernel.
+ */
+zpool_prop_t zpool_name_to_prop(const char *);
+const char *zpool_prop_to_name(zpool_prop_t);
+const char *zpool_prop_default_string(zpool_prop_t);
+uint64_t zpool_prop_default_numeric(zpool_prop_t);
+boolean_t zpool_prop_readonly(zpool_prop_t);
+int zpool_prop_index_to_string(zpool_prop_t, uint64_t, const char **);
+int zpool_prop_string_to_index(zpool_prop_t, const char *, uint64_t *);
+uint64_t zpool_prop_random_value(zpool_prop_t, uint64_t seed);
+
+/*
+ * Definitions for the Delegation.
+ */
+typedef enum {
+	ZFS_DELEG_WHO_UNKNOWN = 0,
+	ZFS_DELEG_USER = 'u',
+	ZFS_DELEG_USER_SETS = 'U',
+	ZFS_DELEG_GROUP = 'g',
+	ZFS_DELEG_GROUP_SETS = 'G',
+	ZFS_DELEG_EVERYONE = 'e',
+	ZFS_DELEG_EVERYONE_SETS = 'E',
+	ZFS_DELEG_CREATE = 'c',
+	ZFS_DELEG_CREATE_SETS = 'C',
+	ZFS_DELEG_NAMED_SET = 's',
+	ZFS_DELEG_NAMED_SET_SETS = 'S'
+} zfs_deleg_who_type_t;
+
+typedef enum {
+	ZFS_DELEG_NONE = 0,
+	ZFS_DELEG_PERM_LOCAL = 1,
+	ZFS_DELEG_PERM_DESCENDENT = 2,
+	ZFS_DELEG_PERM_LOCALDESCENDENT = 3,
+	ZFS_DELEG_PERM_CREATE = 4
+} zfs_deleg_inherit_t;
+
+#define	ZFS_DELEG_PERM_UID	"uid"
+#define	ZFS_DELEG_PERM_GID	"gid"
+#define	ZFS_DELEG_PERM_GROUPS	"groups"
+
+#define	ZFS_MLSLABEL_DEFAULT	"none"
+
+#define	ZFS_SMB_ACL_SRC		"src"
+#define	ZFS_SMB_ACL_TARGET	"target"
+
+typedef enum {
+	ZFS_CANMOUNT_OFF = 0,
+	ZFS_CANMOUNT_ON = 1,
+	ZFS_CANMOUNT_NOAUTO = 2
+} zfs_canmount_type_t;
+
+typedef enum {
+	ZFS_LOGBIAS_LATENCY = 0,
+	ZFS_LOGBIAS_THROUGHPUT = 1
+} zfs_logbias_op_t;
+
+typedef enum zfs_share_op {
+	ZFS_SHARE_NFS = 0,
+	ZFS_UNSHARE_NFS = 1,
+	ZFS_SHARE_SMB = 2,
+	ZFS_UNSHARE_SMB = 3
+} zfs_share_op_t;
+
+typedef enum zfs_smb_acl_op {
+	ZFS_SMB_ACL_ADD,
+	ZFS_SMB_ACL_REMOVE,
+	ZFS_SMB_ACL_RENAME,
+	ZFS_SMB_ACL_PURGE
+} zfs_smb_acl_op_t;
+
+typedef enum zfs_cache_type {
+	ZFS_CACHE_NONE = 0,
+	ZFS_CACHE_METADATA = 1,
+	ZFS_CACHE_ALL = 2
+} zfs_cache_type_t;
+
+typedef enum {
+	ZFS_SYNC_STANDARD = 0,
+	ZFS_SYNC_ALWAYS = 1,
+	ZFS_SYNC_DISABLED = 2
+} zfs_sync_type_t;
+
+
+/*
+ * On-disk version number.
+ */
+#define	SPA_VERSION_1			1ULL
+#define	SPA_VERSION_2			2ULL
+#define	SPA_VERSION_3			3ULL
+#define	SPA_VERSION_4			4ULL
+#define	SPA_VERSION_5			5ULL
+#define	SPA_VERSION_6			6ULL
+#define	SPA_VERSION_7			7ULL
+#define	SPA_VERSION_8			8ULL
+#define	SPA_VERSION_9			9ULL
+#define	SPA_VERSION_10			10ULL
+#define	SPA_VERSION_11			11ULL
+#define	SPA_VERSION_12			12ULL
+#define	SPA_VERSION_13			13ULL
+#define	SPA_VERSION_14			14ULL
+#define	SPA_VERSION_15			15ULL
+#define	SPA_VERSION_16			16ULL
+#define	SPA_VERSION_17			17ULL
+#define	SPA_VERSION_18			18ULL
+#define	SPA_VERSION_19			19ULL
+#define	SPA_VERSION_20			20ULL
+#define	SPA_VERSION_21			21ULL
+#define	SPA_VERSION_22			22ULL
+#define	SPA_VERSION_23			23ULL
+#define	SPA_VERSION_24			24ULL
+#define	SPA_VERSION_25			25ULL
+#define	SPA_VERSION_26			26ULL
+#define	SPA_VERSION_27			27ULL
+#define	SPA_VERSION_28			28ULL
+
+/*
+ * When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk
+ * format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*},
+ * and do the appropriate changes.  Also bump the version number in
+ * usr/src/grub/capability.
+ */
+#define	SPA_VERSION			SPA_VERSION_28
+#define	SPA_VERSION_STRING		"28"
+
+/*
+ * Symbolic names for the changes that caused a SPA_VERSION switch.
+ * Used in the code when checking for presence or absence of a feature.
+ * Feel free to define multiple symbolic names for each version if there
+ * were multiple changes to on-disk structures during that version.
+ *
+ * NOTE: When checking the current SPA_VERSION in your code, be sure
+ *       to use spa_version() since it reports the version of the
+ *       last synced uberblock.  Checking the in-flight version can
+ *       be dangerous in some cases.
+ */
+#define	SPA_VERSION_INITIAL		SPA_VERSION_1
+#define	SPA_VERSION_DITTO_BLOCKS	SPA_VERSION_2
+#define	SPA_VERSION_SPARES		SPA_VERSION_3
+#define	SPA_VERSION_RAIDZ2		SPA_VERSION_3
+#define	SPA_VERSION_BPOBJ_ACCOUNT	SPA_VERSION_3
+#define	SPA_VERSION_RAIDZ_DEFLATE	SPA_VERSION_3
+#define	SPA_VERSION_DNODE_BYTES		SPA_VERSION_3
+#define	SPA_VERSION_ZPOOL_HISTORY	SPA_VERSION_4
+#define	SPA_VERSION_GZIP_COMPRESSION	SPA_VERSION_5
+#define	SPA_VERSION_BOOTFS		SPA_VERSION_6
+#define	SPA_VERSION_SLOGS		SPA_VERSION_7
+#define	SPA_VERSION_DELEGATED_PERMS	SPA_VERSION_8
+#define	SPA_VERSION_FUID		SPA_VERSION_9
+#define	SPA_VERSION_REFRESERVATION	SPA_VERSION_9
+#define	SPA_VERSION_REFQUOTA		SPA_VERSION_9
+#define	SPA_VERSION_UNIQUE_ACCURATE	SPA_VERSION_9
+#define	SPA_VERSION_L2CACHE		SPA_VERSION_10
+#define	SPA_VERSION_NEXT_CLONES		SPA_VERSION_11
+#define	SPA_VERSION_ORIGIN		SPA_VERSION_11
+#define	SPA_VERSION_DSL_SCRUB		SPA_VERSION_11
+#define	SPA_VERSION_SNAP_PROPS		SPA_VERSION_12
+#define	SPA_VERSION_USED_BREAKDOWN	SPA_VERSION_13
+#define	SPA_VERSION_PASSTHROUGH_X	SPA_VERSION_14
+#define	SPA_VERSION_USERSPACE		SPA_VERSION_15
+#define	SPA_VERSION_STMF_PROP		SPA_VERSION_16
+#define	SPA_VERSION_RAIDZ3		SPA_VERSION_17
+#define	SPA_VERSION_USERREFS		SPA_VERSION_18
+#define	SPA_VERSION_HOLES		SPA_VERSION_19
+#define	SPA_VERSION_ZLE_COMPRESSION	SPA_VERSION_20
+#define	SPA_VERSION_DEDUP		SPA_VERSION_21
+#define	SPA_VERSION_RECVD_PROPS		SPA_VERSION_22
+#define	SPA_VERSION_SLIM_ZIL		SPA_VERSION_23
+#define	SPA_VERSION_SA			SPA_VERSION_24
+#define	SPA_VERSION_SCAN		SPA_VERSION_25
+#define	SPA_VERSION_DIR_CLONES		SPA_VERSION_26
+#define	SPA_VERSION_DEADLISTS		SPA_VERSION_26
+#define	SPA_VERSION_FAST_SNAP		SPA_VERSION_27
+#define	SPA_VERSION_MULTI_REPLACE	SPA_VERSION_28
+
+/*
+ * ZPL version - rev'd whenever an incompatible on-disk format change
+ * occurs.  This is independent of SPA/DMU/ZAP versioning.  You must
+ * also update the version_table[] and help message in zfs_prop.c.
+ *
+ * When changing, be sure to teach GRUB how to read the new format!
+ * See usr/src/grub/grub-0.97/stage2/{zfs-include/,fsys_zfs*}
+ */
+#define	ZPL_VERSION_1			1ULL
+#define	ZPL_VERSION_2			2ULL
+#define	ZPL_VERSION_3			3ULL
+#define	ZPL_VERSION_4			4ULL
+#define	ZPL_VERSION_5			5ULL
+#define	ZPL_VERSION			ZPL_VERSION_5
+#define	ZPL_VERSION_STRING		"5"
+
+#define	ZPL_VERSION_INITIAL		ZPL_VERSION_1
+#define	ZPL_VERSION_DIRENT_TYPE		ZPL_VERSION_2
+#define	ZPL_VERSION_FUID		ZPL_VERSION_3
+#define	ZPL_VERSION_NORMALIZATION	ZPL_VERSION_3
+#define	ZPL_VERSION_SYSATTR		ZPL_VERSION_3
+#define	ZPL_VERSION_USERSPACE		ZPL_VERSION_4
+#define	ZPL_VERSION_SA			ZPL_VERSION_5
+
+/* Rewind request information */
+#define	ZPOOL_NO_REWIND		1  /* No policy - default behavior */
+#define	ZPOOL_NEVER_REWIND	2  /* Do not search for best txg or rewind */
+#define	ZPOOL_TRY_REWIND	4  /* Search for best txg, but do not rewind */
+#define	ZPOOL_DO_REWIND		8  /* Rewind to best txg w/in deferred frees */
+#define	ZPOOL_EXTREME_REWIND	16 /* Allow extreme measures to find best txg */
+#define	ZPOOL_REWIND_MASK	28 /* All the possible rewind bits */
+#define	ZPOOL_REWIND_POLICIES	31 /* All the possible policy bits */
+
+typedef struct zpool_rewind_policy {
+	uint32_t	zrp_request;	/* rewind behavior requested */
+	uint64_t	zrp_maxmeta;	/* max acceptable meta-data errors */
+	uint64_t	zrp_maxdata;	/* max acceptable data errors */
+	uint64_t	zrp_txg;	/* specific txg to load */
+} zpool_rewind_policy_t;
+
+/*
+ * The following are configuration names used in the nvlist describing a pool's
+ * configuration.
+ */
+#define	ZPOOL_CONFIG_VERSION		"version"
+#define	ZPOOL_CONFIG_POOL_NAME		"name"
+#define	ZPOOL_CONFIG_POOL_STATE		"state"
+#define	ZPOOL_CONFIG_POOL_TXG		"txg"
+#define	ZPOOL_CONFIG_POOL_GUID		"pool_guid"
+#define	ZPOOL_CONFIG_CREATE_TXG		"create_txg"
+#define	ZPOOL_CONFIG_TOP_GUID		"top_guid"
+#define	ZPOOL_CONFIG_VDEV_TREE		"vdev_tree"
+#define	ZPOOL_CONFIG_TYPE		"type"
+#define	ZPOOL_CONFIG_CHILDREN		"children"
+#define	ZPOOL_CONFIG_ID			"id"
+#define	ZPOOL_CONFIG_GUID		"guid"
+#define	ZPOOL_CONFIG_PATH		"path"
+#define	ZPOOL_CONFIG_DEVID		"devid"
+#define	ZPOOL_CONFIG_METASLAB_ARRAY	"metaslab_array"
+#define	ZPOOL_CONFIG_METASLAB_SHIFT	"metaslab_shift"
+#define	ZPOOL_CONFIG_ASHIFT		"ashift"
+#define	ZPOOL_CONFIG_ASIZE		"asize"
+#define	ZPOOL_CONFIG_DTL		"DTL"
+#define	ZPOOL_CONFIG_SCAN_STATS		"scan_stats"	/* not stored on disk */
+#define	ZPOOL_CONFIG_VDEV_STATS		"vdev_stats"	/* not stored on disk */
+#define	ZPOOL_CONFIG_WHOLE_DISK		"whole_disk"
+#define	ZPOOL_CONFIG_ERRCOUNT		"error_count"
+#define	ZPOOL_CONFIG_NOT_PRESENT	"not_present"
+#define	ZPOOL_CONFIG_SPARES		"spares"
+#define	ZPOOL_CONFIG_IS_SPARE		"is_spare"
+#define	ZPOOL_CONFIG_NPARITY		"nparity"
+#define	ZPOOL_CONFIG_HOSTID		"hostid"
+#define	ZPOOL_CONFIG_HOSTNAME		"hostname"
+#define	ZPOOL_CONFIG_LOADED_TIME	"initial_load_time"
+#define	ZPOOL_CONFIG_UNSPARE		"unspare"
+#define	ZPOOL_CONFIG_PHYS_PATH		"phys_path"
+#define	ZPOOL_CONFIG_IS_LOG		"is_log"
+#define	ZPOOL_CONFIG_L2CACHE		"l2cache"
+#define	ZPOOL_CONFIG_HOLE_ARRAY		"hole_array"
+#define	ZPOOL_CONFIG_VDEV_CHILDREN	"vdev_children"
+#define	ZPOOL_CONFIG_IS_HOLE		"is_hole"
+#define	ZPOOL_CONFIG_DDT_HISTOGRAM	"ddt_histogram"
+#define	ZPOOL_CONFIG_DDT_OBJ_STATS	"ddt_object_stats"
+#define	ZPOOL_CONFIG_DDT_STATS		"ddt_stats"
+#define	ZPOOL_CONFIG_SPLIT		"splitcfg"
+#define	ZPOOL_CONFIG_ORIG_GUID		"orig_guid"
+#define	ZPOOL_CONFIG_SPLIT_GUID		"split_guid"
+#define	ZPOOL_CONFIG_SPLIT_LIST		"guid_list"
+#define	ZPOOL_CONFIG_REMOVING		"removing"
+#define	ZPOOL_CONFIG_RESILVERING	"resilvering"
+#define	ZPOOL_CONFIG_SUSPENDED		"suspended"	/* not stored on disk */
+#define	ZPOOL_CONFIG_TIMESTAMP		"timestamp"	/* not stored on disk */
+#define	ZPOOL_CONFIG_BOOTFS		"bootfs"	/* not stored on disk */
+#define	ZPOOL_CONFIG_MISSING_DEVICES	"missing_vdevs"	/* not stored on disk */
+#define	ZPOOL_CONFIG_LOAD_INFO		"load_info"	/* not stored on disk */
+/*
+ * The persistent vdev state is stored as separate values rather than a single
+ * 'vdev_state' entry.  This is because a device can be in multiple states, such
+ * as offline and degraded.
+ */
+#define	ZPOOL_CONFIG_OFFLINE		"offline"
+#define	ZPOOL_CONFIG_FAULTED		"faulted"
+#define	ZPOOL_CONFIG_DEGRADED		"degraded"
+#define	ZPOOL_CONFIG_REMOVED		"removed"
+#define	ZPOOL_CONFIG_FRU		"fru"
+#define	ZPOOL_CONFIG_AUX_STATE		"aux_state"
+
+/* Rewind policy parameters */
+#define	ZPOOL_REWIND_POLICY		"rewind-policy"
+#define	ZPOOL_REWIND_REQUEST		"rewind-request"
+#define	ZPOOL_REWIND_REQUEST_TXG	"rewind-request-txg"
+#define	ZPOOL_REWIND_META_THRESH	"rewind-meta-thresh"
+#define	ZPOOL_REWIND_DATA_THRESH	"rewind-data-thresh"
+
+/* Rewind data discovered */
+#define	ZPOOL_CONFIG_LOAD_TIME		"rewind_txg_ts"
+#define	ZPOOL_CONFIG_LOAD_DATA_ERRORS	"verify_data_errors"
+#define	ZPOOL_CONFIG_REWIND_TIME	"seconds_of_rewind"
+
+#define	VDEV_TYPE_ROOT			"root"
+#define	VDEV_TYPE_MIRROR		"mirror"
+#define	VDEV_TYPE_REPLACING		"replacing"
+#define	VDEV_TYPE_RAIDZ			"raidz"
+#define	VDEV_TYPE_DISK			"disk"
+#define	VDEV_TYPE_FILE			"file"
+#define	VDEV_TYPE_MISSING		"missing"
+#define	VDEV_TYPE_HOLE			"hole"
+#define	VDEV_TYPE_SPARE			"spare"
+#define	VDEV_TYPE_LOG			"log"
+#define	VDEV_TYPE_L2CACHE		"l2cache"
+
+/*
+ * This is needed in userland to report the minimum necessary device size.
+ */
+#define	SPA_MINDEVSIZE		(64ULL << 20)
+
+/*
+ * The location of the pool configuration repository, shared between kernel and
+ * userland.
+ */
+#define	ZPOOL_CACHE		"/etc/zfs/zpool.cache"
+
+/*
+ * vdev states are ordered from least to most healthy.
+ * A vdev that's CANT_OPEN or below is considered unusable.
+ */
+typedef enum vdev_state {
+	VDEV_STATE_UNKNOWN = 0,	/* Uninitialized vdev			*/
+	VDEV_STATE_CLOSED,	/* Not currently open			*/
+	VDEV_STATE_OFFLINE,	/* Not allowed to open			*/
+	VDEV_STATE_REMOVED,	/* Explicitly removed from system	*/
+	VDEV_STATE_CANT_OPEN,	/* Tried to open, but failed		*/
+	VDEV_STATE_FAULTED,	/* External request to fault device	*/
+	VDEV_STATE_DEGRADED,	/* Replicated vdev with unhealthy kids	*/
+	VDEV_STATE_HEALTHY	/* Presumed good			*/
+} vdev_state_t;
+
+#define	VDEV_STATE_ONLINE	VDEV_STATE_HEALTHY
+
+/*
+ * vdev aux states.  When a vdev is in the CANT_OPEN state, the aux field
+ * of the vdev stats structure uses these constants to distinguish why.
+ */
+typedef enum vdev_aux {
+	VDEV_AUX_NONE,		/* no error				*/
+	VDEV_AUX_OPEN_FAILED,	/* ldi_open_*() or vn_open() failed	*/
+	VDEV_AUX_CORRUPT_DATA,	/* bad label or disk contents		*/
+	VDEV_AUX_NO_REPLICAS,	/* insufficient number of replicas	*/
+	VDEV_AUX_BAD_GUID_SUM,	/* vdev guid sum doesn't match		*/
+	VDEV_AUX_TOO_SMALL,	/* vdev size is too small		*/
+	VDEV_AUX_BAD_LABEL,	/* the label is OK but invalid		*/
+	VDEV_AUX_VERSION_NEWER,	/* on-disk version is too new		*/
+	VDEV_AUX_VERSION_OLDER,	/* on-disk version is too old		*/
+	VDEV_AUX_SPARED,	/* hot spare used in another pool	*/
+	VDEV_AUX_ERR_EXCEEDED,	/* too many errors			*/
+	VDEV_AUX_IO_FAILURE,	/* experienced I/O failure		*/
+	VDEV_AUX_BAD_LOG,	/* cannot read log chain(s)		*/
+	VDEV_AUX_EXTERNAL,	/* external diagnosis			*/
+	VDEV_AUX_SPLIT_POOL	/* vdev was split off into another pool	*/
+} vdev_aux_t;
+
+/*
+ * pool state.  The following states are written to disk as part of the normal
+ * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
+ * states are software abstractions used at various levels to communicate
+ * pool state.
+ */
+typedef enum pool_state {
+	POOL_STATE_ACTIVE = 0,		/* In active use		*/
+	POOL_STATE_EXPORTED,		/* Explicitly exported		*/
+	POOL_STATE_DESTROYED,		/* Explicitly destroyed		*/
+	POOL_STATE_SPARE,		/* Reserved for hot spare use	*/
+	POOL_STATE_L2CACHE,		/* Level 2 ARC device		*/
+	POOL_STATE_UNINITIALIZED,	/* Internal spa_t state		*/
+	POOL_STATE_UNAVAIL,		/* Internal libzfs state	*/
+	POOL_STATE_POTENTIALLY_ACTIVE	/* Internal libzfs state	*/
+} pool_state_t;
+
+/*
+ * Scan Functions.
+ */
+typedef enum pool_scan_func {
+	POOL_SCAN_NONE,
+	POOL_SCAN_SCRUB,
+	POOL_SCAN_RESILVER,
+	POOL_SCAN_FUNCS
+} pool_scan_func_t;
+
+/*
+ * ZIO types.  Needed to interpret vdev statistics below.
+ */
+typedef enum zio_type {
+	ZIO_TYPE_NULL = 0,
+	ZIO_TYPE_READ,
+	ZIO_TYPE_WRITE,
+	ZIO_TYPE_FREE,
+	ZIO_TYPE_CLAIM,
+	ZIO_TYPE_IOCTL,
+	ZIO_TYPES
+} zio_type_t;
+
+/*
+ * Pool statistics.  Note: all fields should be 64-bit because this
+ * is passed between kernel and userland as an nvlist uint64 array.
+ */
+typedef struct pool_scan_stat {
+	/* values stored on disk */
+	uint64_t	pss_func;	/* pool_scan_func_t */
+	uint64_t	pss_state;	/* dsl_scan_state_t */
+	uint64_t	pss_start_time;	/* scan start time */
+	uint64_t	pss_end_time;	/* scan end time */
+	uint64_t	pss_to_examine;	/* total bytes to scan */
+	uint64_t	pss_examined;	/* total examined bytes	*/
+	uint64_t	pss_to_process; /* total bytes to process */
+	uint64_t	pss_processed;	/* total processed bytes */
+	uint64_t	pss_errors;	/* scan errors	*/
+
+	/* values not stored on disk */
+	uint64_t	pss_pass_exam;	/* examined bytes per scan pass */
+	uint64_t	pss_pass_start;	/* start time of a scan pass */
+} pool_scan_stat_t;
+
+typedef enum dsl_scan_state {
+	DSS_NONE,
+	DSS_SCANNING,
+	DSS_FINISHED,
+	DSS_CANCELED,
+	DSS_NUM_STATES
+} dsl_scan_state_t;
+
+
+/*
+ * Vdev statistics.  Note: all fields should be 64-bit because this
+ * is passed between kernel and userland as an nvlist uint64 array.
+ */
+typedef struct vdev_stat {
+	hrtime_t	vs_timestamp;		/* time since vdev load	*/
+	uint64_t	vs_state;		/* vdev state		*/
+	uint64_t	vs_aux;			/* see vdev_aux_t	*/
+	uint64_t	vs_alloc;		/* space allocated	*/
+	uint64_t	vs_space;		/* total capacity	*/
+	uint64_t	vs_dspace;		/* deflated capacity	*/
+	uint64_t	vs_rsize;		/* replaceable dev size */
+	uint64_t	vs_ops[ZIO_TYPES];	/* operation count	*/
+	uint64_t	vs_bytes[ZIO_TYPES];	/* bytes read/written	*/
+	uint64_t	vs_read_errors;		/* read errors		*/
+	uint64_t	vs_write_errors;	/* write errors		*/
+	uint64_t	vs_checksum_errors;	/* checksum errors	*/
+	uint64_t	vs_self_healed;		/* self-healed bytes	*/
+	uint64_t	vs_scan_removing;	/* removing?	*/
+	uint64_t	vs_scan_processed;	/* scan processed bytes	*/
+} vdev_stat_t;
+
+/*
+ * DDT statistics.  Note: all fields should be 64-bit because this
+ * is passed between kernel and userland as an nvlist uint64 array.
+ */
+typedef struct ddt_object {
+	uint64_t	ddo_count;	/* number of elments in ddt 	*/
+	uint64_t	ddo_dspace;	/* size of ddt on disk		*/
+	uint64_t	ddo_mspace;	/* size of ddt in-core		*/
+} ddt_object_t;
+
+typedef struct ddt_stat {
+	uint64_t	dds_blocks;	/* blocks			*/
+	uint64_t	dds_lsize;	/* logical size			*/
+	uint64_t	dds_psize;	/* physical size		*/
+	uint64_t	dds_dsize;	/* deflated allocated size	*/
+	uint64_t	dds_ref_blocks;	/* referenced blocks		*/
+	uint64_t	dds_ref_lsize;	/* referenced lsize * refcnt	*/
+	uint64_t	dds_ref_psize;	/* referenced psize * refcnt	*/
+	uint64_t	dds_ref_dsize;	/* referenced dsize * refcnt	*/
+} ddt_stat_t;
+
+typedef struct ddt_histogram {
+	ddt_stat_t	ddh_stat[64];	/* power-of-two histogram buckets */
+} ddt_histogram_t;
+
+#define	ZVOL_DRIVER	"zvol"
+#define	ZFS_DRIVER	"zfs"
+#define	ZFS_DEV		"/dev/zfs"
+
+/* general zvol path */
+#define	ZVOL_DIR		"/dev/zvol"
+/* expansion */
+#define	ZVOL_PSEUDO_DEV		"/devices/pseudo/zfs@0:"
+/* for dump and swap */
+#define	ZVOL_FULL_DEV_DIR	ZVOL_DIR "/dsk/"
+#define	ZVOL_FULL_RDEV_DIR	ZVOL_DIR "/rdsk/"
+
+#define	ZVOL_PROP_NAME		"name"
+#define	ZVOL_DEFAULT_BLOCKSIZE	8192
+
+/*
+ * /dev/zfs ioctl numbers.
+ */
+#define	ZFS_IOC		('Z' << 8)
+
+typedef enum zfs_ioc {
+	ZFS_IOC_POOL_CREATE = ZFS_IOC,
+	ZFS_IOC_POOL_DESTROY,
+	ZFS_IOC_POOL_IMPORT,
+	ZFS_IOC_POOL_EXPORT,
+	ZFS_IOC_POOL_CONFIGS,
+	ZFS_IOC_POOL_STATS,
+	ZFS_IOC_POOL_TRYIMPORT,
+	ZFS_IOC_POOL_SCAN,
+	ZFS_IOC_POOL_FREEZE,
+	ZFS_IOC_POOL_UPGRADE,
+	ZFS_IOC_POOL_GET_HISTORY,
+	ZFS_IOC_VDEV_ADD,
+	ZFS_IOC_VDEV_REMOVE,
+	ZFS_IOC_VDEV_SET_STATE,
+	ZFS_IOC_VDEV_ATTACH,
+	ZFS_IOC_VDEV_DETACH,
+	ZFS_IOC_VDEV_SETPATH,
+	ZFS_IOC_VDEV_SETFRU,
+	ZFS_IOC_OBJSET_STATS,
+	ZFS_IOC_OBJSET_ZPLPROPS,
+	ZFS_IOC_DATASET_LIST_NEXT,
+	ZFS_IOC_SNAPSHOT_LIST_NEXT,
+	ZFS_IOC_SET_PROP,
+	ZFS_IOC_CREATE,
+	ZFS_IOC_DESTROY,
+	ZFS_IOC_ROLLBACK,
+	ZFS_IOC_RENAME,
+	ZFS_IOC_RECV,
+	ZFS_IOC_SEND,
+	ZFS_IOC_INJECT_FAULT,
+	ZFS_IOC_CLEAR_FAULT,
+	ZFS_IOC_INJECT_LIST_NEXT,
+	ZFS_IOC_ERROR_LOG,
+	ZFS_IOC_CLEAR,
+	ZFS_IOC_PROMOTE,
+	ZFS_IOC_DESTROY_SNAPS,
+	ZFS_IOC_SNAPSHOT,
+	ZFS_IOC_DSOBJ_TO_DSNAME,
+	ZFS_IOC_OBJ_TO_PATH,
+	ZFS_IOC_POOL_SET_PROPS,
+	ZFS_IOC_POOL_GET_PROPS,
+	ZFS_IOC_SET_FSACL,
+	ZFS_IOC_GET_FSACL,
+	ZFS_IOC_SHARE,
+	ZFS_IOC_INHERIT_PROP,
+	ZFS_IOC_SMB_ACL,
+	ZFS_IOC_USERSPACE_ONE,
+	ZFS_IOC_USERSPACE_MANY,
+	ZFS_IOC_USERSPACE_UPGRADE,
+	ZFS_IOC_HOLD,
+	ZFS_IOC_RELEASE,
+	ZFS_IOC_GET_HOLDS,
+	ZFS_IOC_OBJSET_RECVD_PROPS,
+	ZFS_IOC_VDEV_SPLIT,
+	ZFS_IOC_NEXT_OBJ,
+	ZFS_IOC_DIFF,
+	ZFS_IOC_TMP_SNAPSHOT,
+	ZFS_IOC_OBJ_TO_STATS
+} zfs_ioc_t;
+
+/*
+ * Internal SPA load state.  Used by FMA diagnosis engine.
+ */
+typedef enum {
+	SPA_LOAD_NONE,		/* no load in progress	*/
+	SPA_LOAD_OPEN,		/* normal open		*/
+	SPA_LOAD_IMPORT,	/* import in progress	*/
+	SPA_LOAD_TRYIMPORT,	/* tryimport in progress */
+	SPA_LOAD_RECOVER,	/* recovery requested	*/
+	SPA_LOAD_ERROR		/* load failed		*/
+} spa_load_state_t;
+
+/*
+ * Bookmark name values.
+ */
+#define	ZPOOL_ERR_LIST		"error list"
+#define	ZPOOL_ERR_DATASET	"dataset"
+#define	ZPOOL_ERR_OBJECT	"object"
+
+#define	HIS_MAX_RECORD_LEN	(MAXPATHLEN + MAXPATHLEN + 1)
+
+/*
+ * The following are names used in the nvlist describing
+ * the pool's history log.
+ */
+#define	ZPOOL_HIST_RECORD	"history record"
+#define	ZPOOL_HIST_TIME		"history time"
+#define	ZPOOL_HIST_CMD		"history command"
+#define	ZPOOL_HIST_WHO		"history who"
+#define	ZPOOL_HIST_ZONE		"history zone"
+#define	ZPOOL_HIST_HOST		"history hostname"
+#define	ZPOOL_HIST_TXG		"history txg"
+#define	ZPOOL_HIST_INT_EVENT	"history internal event"
+#define	ZPOOL_HIST_INT_STR	"history internal str"
+
+/*
+ * Flags for ZFS_IOC_VDEV_SET_STATE
+ */
+#define	ZFS_ONLINE_CHECKREMOVE	0x1
+#define	ZFS_ONLINE_UNSPARE	0x2
+#define	ZFS_ONLINE_FORCEFAULT	0x4
+#define	ZFS_ONLINE_EXPAND	0x8
+#define	ZFS_OFFLINE_TEMPORARY	0x1
+
+/*
+ * Flags for ZFS_IOC_POOL_IMPORT
+ */
+#define	ZFS_IMPORT_NORMAL	0x0
+#define	ZFS_IMPORT_VERBATIM	0x1
+#define	ZFS_IMPORT_ANY_HOST	0x2
+#define	ZFS_IMPORT_MISSING_LOG	0x4
+#define	ZFS_IMPORT_ONLY		0x8
+
+/*
+ * Sysevent payload members.  ZFS will generate the following sysevents with the
+ * given payloads:
+ *
+ *	ESC_ZFS_RESILVER_START
+ *	ESC_ZFS_RESILVER_END
+ *	ESC_ZFS_POOL_DESTROY
+ *
+ *		ZFS_EV_POOL_NAME	DATA_TYPE_STRING
+ *		ZFS_EV_POOL_GUID	DATA_TYPE_UINT64
+ *
+ *	ESC_ZFS_VDEV_REMOVE
+ *	ESC_ZFS_VDEV_CLEAR
+ *	ESC_ZFS_VDEV_CHECK
+ *
+ *		ZFS_EV_POOL_NAME	DATA_TYPE_STRING
+ *		ZFS_EV_POOL_GUID	DATA_TYPE_UINT64
+ *		ZFS_EV_VDEV_PATH	DATA_TYPE_STRING	(optional)
+ *		ZFS_EV_VDEV_GUID	DATA_TYPE_UINT64
+ */
+#define	ZFS_EV_POOL_NAME	"pool_name"
+#define	ZFS_EV_POOL_GUID	"pool_guid"
+#define	ZFS_EV_VDEV_PATH	"vdev_path"
+#define	ZFS_EV_VDEV_GUID	"vdev_guid"
+
+/*
+ * Note: This is encoded on-disk, so new events must be added to the
+ * end, and unused events can not be removed.  Be sure to edit
+ * libzfs_pool.c: hist_event_table[].
+ */
+typedef enum history_internal_events {
+	LOG_NO_EVENT = 0,
+	LOG_POOL_CREATE,
+	LOG_POOL_VDEV_ADD,
+	LOG_POOL_REMOVE,
+	LOG_POOL_DESTROY,
+	LOG_POOL_EXPORT,
+	LOG_POOL_IMPORT,
+	LOG_POOL_VDEV_ATTACH,
+	LOG_POOL_VDEV_REPLACE,
+	LOG_POOL_VDEV_DETACH,
+	LOG_POOL_VDEV_ONLINE,
+	LOG_POOL_VDEV_OFFLINE,
+	LOG_POOL_UPGRADE,
+	LOG_POOL_CLEAR,
+	LOG_POOL_SCAN,
+	LOG_POOL_PROPSET,
+	LOG_DS_CREATE,
+	LOG_DS_CLONE,
+	LOG_DS_DESTROY,
+	LOG_DS_DESTROY_BEGIN,
+	LOG_DS_INHERIT,
+	LOG_DS_PROPSET,
+	LOG_DS_QUOTA,
+	LOG_DS_PERM_UPDATE,
+	LOG_DS_PERM_REMOVE,
+	LOG_DS_PERM_WHO_REMOVE,
+	LOG_DS_PROMOTE,
+	LOG_DS_RECEIVE,
+	LOG_DS_RENAME,
+	LOG_DS_RESERVATION,
+	LOG_DS_REPLAY_INC_SYNC,
+	LOG_DS_REPLAY_FULL_SYNC,
+	LOG_DS_ROLLBACK,
+	LOG_DS_SNAPSHOT,
+	LOG_DS_UPGRADE,
+	LOG_DS_REFQUOTA,
+	LOG_DS_REFRESERV,
+	LOG_POOL_SCAN_DONE,
+	LOG_DS_USER_HOLD,
+	LOG_DS_USER_RELEASE,
+	LOG_POOL_SPLIT,
+	LOG_END
+} history_internal_events_t;
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_FS_ZFS_H */
diff --git a/uts/common/sys/fs/zut.h b/uts/common/sys/fs/zut.h
new file mode 100644
index 000000000000..36c9eaa7f18e
--- /dev/null
+++ b/uts/common/sys/fs/zut.h
@@ -0,0 +1,93 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _ZUT_H
+#define	_ZUT_H
+
+/*
+ * IOCTLs for the zfs unit test driver
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#define	ZUT_DRIVER	"zut"
+#define	ZUT_DEV		"/dev/zut"
+
+#define	ZUT_VERSION_STRING		"1"
+
+/*
+ * /dev/zut ioctl numbers.
+ */
+#define	ZUT_IOC		('U' << 8)
+
+/* Request flags */
+#define	ZUT_IGNORECASE		0x01
+#define	ZUT_ACCFILTER		0x02
+#define	ZUT_XATTR		0x04
+#define	ZUT_EXTRDDIR		0x08
+#define	ZUT_GETSTAT		0x10
+
+typedef struct zut_lookup {
+	int	zl_reqflags;
+	int	zl_deflags;		/* output */
+	int	zl_retcode;		/* output */
+	char	zl_dir[MAXPATHLEN];
+	char	zl_file[MAXNAMELEN];
+	char	zl_xfile[MAXNAMELEN];
+	char	zl_real[MAXPATHLEN];	/* output */
+	uint64_t zl_xvattrs;		/* output */
+	struct stat64 zl_statbuf;	/* output */
+} zut_lookup_t;
+
+typedef struct zut_readdir {
+	uint64_t zr_buf;		/* pointer to output buffer */
+	uint64_t zr_loffset;		/* output */
+	char	zr_dir[MAXPATHLEN];
+	char	zr_file[MAXNAMELEN];
+	int	zr_reqflags;
+	int	zr_retcode;		/* output */
+	int	zr_eof;			/* output */
+	uint_t	zr_bytes;		/* output */
+	uint_t	zr_buflen;
+} zut_readdir_t;
+
+typedef enum zut_ioc {
+	ZUT_IOC_MIN_CMD = ZUT_IOC - 1,
+	ZUT_IOC_LOOKUP = ZUT_IOC,
+	ZUT_IOC_READDIR,
+	ZUT_IOC_MAX_CMD
+} zut_ioc_t;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ZUT_H */
diff --git a/uts/common/sys/gfs.h b/uts/common/sys/gfs.h
new file mode 100644
index 000000000000..71c7c2ef78c9
--- /dev/null
+++ b/uts/common/sys/gfs.h
@@ -0,0 +1,173 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * These are Consolidation Private interfaces and are subject to change.
+ */
+
+#ifndef _SYS_GFS_H
+#define	_SYS_GFS_H
+
+#include <sys/types.h>
+#include <sys/vnode.h>
+#include <sys/vfs_opreg.h>
+#include <sys/mutex.h>
+#include <sys/dirent.h>
+#include <sys/extdirent.h>
+#include <sys/uio.h>
+#include <sys/list.h>
+#include <sys/pathname.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct gfs_opsvec {
+	const char		*gfsv_name;	/* vnode description */
+	const fs_operation_def_t *gfsv_template; /* ops template */
+	vnodeops_t		**gfsv_ops;	/* ptr to result */
+} gfs_opsvec_t;
+
+int gfs_make_opsvec(gfs_opsvec_t *);
+
+#define	GFS_CACHE_VNODE		0x1
+
+typedef struct gfs_dirent {
+	char			*gfse_name;	/* entry name */
+	vnode_t *(*gfse_ctor)(vnode_t *);	/* constructor */
+	int			gfse_flags;	/* flags */
+	list_node_t		gfse_link;	/* dynamic list */
+	vnode_t			*gfse_vnode;	/* cached vnode */
+} gfs_dirent_t;
+
+typedef enum gfs_type {
+	GFS_DIR,
+	GFS_FILE
+} gfs_type_t;
+
+typedef struct gfs_file {
+	vnode_t		*gfs_vnode;	/* current vnode */
+	vnode_t		*gfs_parent;	/* parent vnode */
+	size_t		gfs_size;	/* size of private data structure */
+	gfs_type_t	gfs_type;	/* type of vnode */
+	int		gfs_index;	/* index in parent dir */
+	ino64_t		gfs_ino;	/* inode for this vnode */
+} gfs_file_t;
+
+typedef int (*gfs_readdir_cb)(vnode_t *, void *, int *, offset_t *,
+    offset_t *, void *, int);
+typedef int (*gfs_lookup_cb)(vnode_t *, const char *, vnode_t **, ino64_t *,
+    cred_t *, int, int *, pathname_t *);
+typedef ino64_t (*gfs_inode_cb)(vnode_t *, int);
+
+typedef struct gfs_dir {
+	gfs_file_t	gfsd_file;	/* generic file attributes */
+	gfs_dirent_t	*gfsd_static;	/* statically defined entries */
+	int		gfsd_nstatic;	/* # static entries */
+	kmutex_t	gfsd_lock;	/* protects entries */
+	int		gfsd_maxlen;	/* maximum name length */
+	gfs_readdir_cb	gfsd_readdir;	/* readdir() callback */
+	gfs_lookup_cb	gfsd_lookup;	/* lookup() callback */
+	gfs_inode_cb	gfsd_inode;	/* get an inode number */
+} gfs_dir_t;
+
+struct vfs;
+
+extern vnode_t *gfs_file_create(size_t, vnode_t *, vnodeops_t *);
+extern vnode_t *gfs_dir_create(size_t, vnode_t *, vnodeops_t *,
+    gfs_dirent_t *, gfs_inode_cb, int, gfs_readdir_cb, gfs_lookup_cb);
+extern vnode_t *gfs_root_create(size_t, struct vfs *, vnodeops_t *, ino64_t,
+    gfs_dirent_t *, gfs_inode_cb, int, gfs_readdir_cb, gfs_lookup_cb);
+extern vnode_t *gfs_root_create_file(size_t, struct vfs *, vnodeops_t *,
+    ino64_t);
+
+extern void *gfs_file_inactive(vnode_t *);
+extern void *gfs_dir_inactive(vnode_t *);
+
+extern int gfs_dir_case_lookup(vnode_t *, const char *, vnode_t **, cred_t *,
+    int, int *, pathname_t *);
+extern int gfs_dir_lookup(vnode_t *, const char *, vnode_t **, cred_t *,
+    int, int *, pathname_t *);
+extern int gfs_dir_readdir(vnode_t *, uio_t *, int *, void *, cred_t *,
+    caller_context_t *, int flags);
+
+#define	gfs_dir_lock(gd)	mutex_enter(&(gd)->gfsd_lock)
+#define	gfs_dir_unlock(gd)	mutex_exit(&(gd)->gfsd_lock)
+#define	GFS_DIR_LOCKED(gd)	MUTEX_HELD(&(gd)->gfsd_lock)
+
+#define	gfs_file_parent(vp)	(((gfs_file_t *)(vp)->v_data)->gfs_parent)
+
+#define	gfs_file_index(vp)	(((gfs_file_t *)(vp)->v_data)->gfs_index)
+#define	gfs_file_set_index(vp, idx)	\
+	(((gfs_file_t *)(vp)->v_data)->gfs_index = (idx))
+
+#define	gfs_file_inode(vp)	(((gfs_file_t *)(vp)->v_data)->gfs_ino)
+#define	gfs_file_set_inode(vp, ino)	\
+	(((gfs_file_t *)(vp)->v_data)->gfs_ino = (ino))
+
+typedef struct gfs_readdir_state {
+	void		*grd_dirent;	/* directory entry buffer */
+	size_t		grd_namlen;	/* max file name length */
+	size_t		grd_ureclen;	/* exported record size */
+	ssize_t		grd_oresid;	/* original uio_resid */
+	ino64_t		grd_parent;	/* inode of parent */
+	ino64_t		grd_self;	/* inode of self */
+	int		grd_flags;	/* flags from VOP_READDIR */
+} gfs_readdir_state_t;
+
+extern int gfs_readdir_init(gfs_readdir_state_t *, int, int, uio_t *, ino64_t,
+    ino64_t, int);
+extern int gfs_readdir_emit(gfs_readdir_state_t *, uio_t *, offset_t, ino64_t,
+    const char *, int);
+extern int gfs_readdir_emitn(gfs_readdir_state_t *, uio_t *, offset_t, ino64_t,
+    unsigned long);
+extern int gfs_readdir_pred(gfs_readdir_state_t *, uio_t *, offset_t *);
+extern int gfs_readdir_fini(gfs_readdir_state_t *, int, int *, int);
+extern int gfs_get_parent_ino(vnode_t *, cred_t *, caller_context_t *,
+    ino64_t *, ino64_t *);
+
+/*
+ * Objects with real extended attributes will get their . and ..
+ * readdir entries from the real xattr directory. GFS_STATIC_ENTRY_OFFSET
+ * lets us skip right to the static entries in the GFS directory.
+ */
+#define	GFS_STATIC_ENTRY_OFFSET	((offset_t)2)
+
+extern int gfs_lookup_dot(vnode_t **, vnode_t *, vnode_t *, const char *);
+
+extern int gfs_vop_lookup(vnode_t *, char *, vnode_t **, pathname_t *,
+    int, vnode_t *, cred_t *, caller_context_t *, int *, pathname_t *);
+extern int gfs_vop_readdir(vnode_t *, uio_t *, cred_t *, int *,
+    caller_context_t *, int);
+extern int gfs_vop_map(vnode_t *, offset_t, struct as *, caddr_t *,
+    size_t, uchar_t, uchar_t, uint_t, cred_t *, caller_context_t *);
+extern void gfs_vop_inactive(vnode_t *, cred_t *, caller_context_t *);
+
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_GFS_H */
diff --git a/uts/common/sys/idmap.h b/uts/common/sys/idmap.h
new file mode 100644
index 000000000000..39eeb905c72b
--- /dev/null
+++ b/uts/common/sys/idmap.h
@@ -0,0 +1,97 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_IDMAP_H
+#define	_SYS_IDMAP_H
+
+
+/* Idmap status codes */
+#define	IDMAP_SUCCESS			0
+#define	IDMAP_NEXT			1
+#define	IDMAP_ERR_OTHER			-10000
+#define	IDMAP_ERR_INTERNAL		-9999
+#define	IDMAP_ERR_MEMORY		-9998
+#define	IDMAP_ERR_NORESULT		-9997
+#define	IDMAP_ERR_NOTUSER		-9996
+#define	IDMAP_ERR_NOTGROUP		-9995
+#define	IDMAP_ERR_NOTSUPPORTED		-9994
+#define	IDMAP_ERR_W2U_NAMERULE		-9993
+#define	IDMAP_ERR_U2W_NAMERULE		-9992
+#define	IDMAP_ERR_CACHE			-9991
+#define	IDMAP_ERR_DB			-9990
+#define	IDMAP_ERR_ARG			-9989
+#define	IDMAP_ERR_SID			-9988
+#define	IDMAP_ERR_IDTYPE		-9987
+#define	IDMAP_ERR_RPC_HANDLE		-9986
+#define	IDMAP_ERR_RPC			-9985
+#define	IDMAP_ERR_CLIENT_HANDLE		-9984
+#define	IDMAP_ERR_BUSY			-9983
+#define	IDMAP_ERR_PERMISSION_DENIED	-9982
+#define	IDMAP_ERR_NOMAPPING		-9981
+#define	IDMAP_ERR_NEW_ID_ALLOC_REQD	-9980
+#define	IDMAP_ERR_DOMAIN		-9979
+#define	IDMAP_ERR_SECURITY		-9978
+#define	IDMAP_ERR_NOTFOUND		-9977
+#define	IDMAP_ERR_DOMAIN_NOTFOUND	-9976
+#define	IDMAP_ERR_UPDATE_NOTALLOWED	-9975
+#define	IDMAP_ERR_CFG			-9974
+#define	IDMAP_ERR_CFG_CHANGE		-9973
+#define	IDMAP_ERR_NOTMAPPED_WELLKNOWN	-9972
+#define	IDMAP_ERR_RETRIABLE_NET_ERR	-9971
+#define	IDMAP_ERR_W2U_NAMERULE_CONFLICT	-9970
+#define	IDMAP_ERR_U2W_NAMERULE_CONFLICT	-9969
+#define	IDMAP_ERR_BAD_UTF8		-9968
+#define	IDMAP_ERR_NONE_GENERATED	-9967
+#define	IDMAP_ERR_PROP_UNKNOWN		-9966
+#define	IDMAP_ERR_NS_LDAP_OP_FAILED	-9965
+#define	IDMAP_ERR_NS_LDAP_PARTIAL	-9964
+#define	IDMAP_ERR_NS_LDAP_CFG		-9963
+#define	IDMAP_ERR_NS_LDAP_BAD_WINNAME	-9962
+#define	IDMAP_ERR_NO_ACTIVEDIRECTORY	-9961
+
+/* Reserved GIDs for some well-known SIDs */
+#define	IDMAP_WK_LOCAL_SYSTEM_GID	2147483648U /* 0x80000000 */
+#define	IDMAP_WK_CREATOR_GROUP_GID	2147483649U
+#define	IDMAP_WK__MAX_GID		2147483649U
+
+/* Reserved UIDs for some well-known SIDs */
+#define	IDMAP_WK_CREATOR_OWNER_UID	2147483648U
+#define	IDMAP_WK__MAX_UID		2147483648U
+
+/* Reserved SIDs */
+#define	IDMAP_WK_CREATOR_SID_AUTHORITY	"S-1-3"
+
+/*
+ * Max door RPC size for ID mapping (can't be too large relative to the
+ * default user-land thread stack size, since clnt_door_call()
+ * alloca()s).  See libidmap:idmap_init().
+ */
+#define	IDMAP_MAX_DOOR_RPC		(256 * 1024)
+
+#define	IDMAP_SENTINEL_PID		UINT32_MAX
+#define	IDMAP_ID_IS_EPHEMERAL(pid)	\
+	(((pid) > INT32_MAX) && ((pid) != IDMAP_SENTINEL_PID))
+
+#endif /* _SYS_IDMAP_H */
diff --git a/uts/common/sys/isa_defs.h b/uts/common/sys/isa_defs.h
new file mode 100644
index 000000000000..c5849546d874
--- /dev/null
+++ b/uts/common/sys/isa_defs.h
@@ -0,0 +1,487 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_ISA_DEFS_H
+#define	_SYS_ISA_DEFS_H
+
+/*
+ * This header file serves to group a set of well known defines and to
+ * set these for each instruction set architecture.  These defines may
+ * be divided into two groups;  characteristics of the processor and
+ * implementation choices for Solaris on a processor.
+ *
+ * Processor Characteristics:
+ *
+ * _LITTLE_ENDIAN / _BIG_ENDIAN:
+ *	The natural byte order of the processor.  A pointer to an int points
+ *	to the least/most significant byte of that int.
+ *
+ * _STACK_GROWS_UPWARD / _STACK_GROWS_DOWNWARD:
+ *	The processor specific direction of stack growth.  A push onto the
+ *	stack increases/decreases the stack pointer, so it stores data at
+ *	successively higher/lower addresses.  (Stackless machines ignored
+ *	without regrets).
+ *
+ * _LONG_LONG_HTOL / _LONG_LONG_LTOH:
+ *	A pointer to a long long points to the most/least significant long
+ *	within that long long.
+ *
+ * _BIT_FIELDS_HTOL / _BIT_FIELDS_LTOH:
+ *	The C compiler assigns bit fields from the high/low to the low/high end
+ *	of an int (most to least significant vs. least to most significant).
+ *
+ * _IEEE_754:
+ *	The processor (or supported implementations of the processor)
+ *	supports the ieee-754 floating point standard.  No other floating
+ *	point standards are supported (or significant).  Any other supported
+ *	floating point formats are expected to be cased on the ISA processor
+ *	symbol.
+ *
+ * _CHAR_IS_UNSIGNED / _CHAR_IS_SIGNED:
+ *	The C Compiler implements objects of type `char' as `unsigned' or
+ *	`signed' respectively.  This is really an implementation choice of
+ *	the compiler writer, but it is specified in the ABI and tends to
+ *	be uniform across compilers for an instruction set architecture.
+ *	Hence, it has the properties of a processor characteristic.
+ *
+ * _CHAR_ALIGNMENT / _SHORT_ALIGNMENT / _INT_ALIGNMENT / _LONG_ALIGNMENT /
+ * _LONG_LONG_ALIGNMENT / _DOUBLE_ALIGNMENT / _LONG_DOUBLE_ALIGNMENT /
+ * _POINTER_ALIGNMENT / _FLOAT_ALIGNMENT:
+ *	The ABI defines alignment requirements of each of the primitive
+ *	object types.  Some, if not all, may be hardware requirements as
+ * 	well.  The values are expressed in "byte-alignment" units.
+ *
+ * _MAX_ALIGNMENT:
+ *	The most stringent alignment requirement as specified by the ABI.
+ *	Equal to the maximum of all the above _XXX_ALIGNMENT values.
+ *
+ * _ALIGNMENT_REQUIRED:
+ *	True or false (1 or 0) whether or not the hardware requires the ABI
+ *	alignment.
+ *
+ * _LONG_LONG_ALIGNMENT_32
+ *	The 32-bit ABI supported by a 64-bit kernel may have different
+ *	alignment requirements for primitive object types.  The value of this
+ *	identifier is expressed in "byte-alignment" units.
+ *
+ * _HAVE_CPUID_INSN
+ *	This indicates that the architecture supports the 'cpuid'
+ *	instruction as defined by Intel.  (Intel allows other vendors
+ *	to extend the instruction for their own purposes.)
+ *
+ *
+ * Implementation Choices:
+ *
+ * _ILP32 / _LP64:
+ *	This specifies the compiler data type implementation as specified in
+ *	the relevant ABI.  The choice between these is strongly influenced
+ *	by the underlying hardware, but is not absolutely tied to it.
+ *	Currently only two data type models are supported:
+ *
+ *	_ILP32:
+ *		Int/Long/Pointer are 32 bits.  This is the historical UNIX
+ *		and Solaris implementation.  Due to its historical standing,
+ *		this is the default case.
+ *
+ *	_LP64:
+ *		Long/Pointer are 64 bits, Int is 32 bits.  This is the chosen
+ *		implementation for 64-bit ABIs such as SPARC V9.
+ *
+ *	_I32LPx:
+ *		A compilation environment where 'int' is 32-bit, and
+ *		longs and pointers are simply the same size.
+ *
+ *	In all cases, Char is 8 bits and Short is 16 bits.
+ *
+ * _SUNOS_VTOC_8 / _SUNOS_VTOC_16 / _SVR4_VTOC_16:
+ *	This specifies the form of the disk VTOC (or label):
+ *
+ *	_SUNOS_VTOC_8:
+ *		This is a VTOC form which is upwardly compatible with the
+ *		SunOS 4.x disk label and allows 8 partitions per disk.
+ *
+ *	_SUNOS_VTOC_16:
+ *		In this format the incore vtoc image matches the ondisk
+ *		version.  It allows 16 slices per disk, and is not
+ *		compatible with the SunOS 4.x disk label.
+ *
+ *	Note that these are not the only two VTOC forms possible and
+ *	additional forms may be added.  One possible form would be the
+ *	SVr4 VTOC form.  The symbol for that is reserved now, although
+ *	it is not implemented.
+ *
+ *	_SVR4_VTOC_16:
+ *		This VTOC form is compatible with the System V Release 4
+ *		VTOC (as implemented on the SVr4 Intel and 3b ports) with
+ *		16 partitions per disk.
+ *
+ *
+ * _DMA_USES_PHYSADDR / _DMA_USES_VIRTADDR
+ *	This describes the type of addresses used by system DMA:
+ *
+ *	_DMA_USES_PHYSADDR:
+ *		This type of DMA, used in the x86 implementation,
+ *		requires physical addresses for DMA buffers.  The 24-bit
+ *		addresses used by some legacy boards is the source of the
+ *		"low-memory" (<16MB) requirement for some devices using DMA.
+ *
+ *	_DMA_USES_VIRTADDR:
+ *		This method of DMA allows the use of virtual addresses for
+ *		DMA transfers.
+ *
+ * _FIRMWARE_NEEDS_FDISK / _NO_FDISK_PRESENT
+ *      This indicates the presence/absence of an fdisk table.
+ *
+ *      _FIRMWARE_NEEDS_FDISK
+ *              The fdisk table is required by system firmware.  If present,
+ *              it allows a disk to be subdivided into multiple fdisk
+ *              partitions, each of which is equivalent to a separate,
+ *              virtual disk.  This enables the co-existence of multiple
+ *              operating systems on a shared hard disk.
+ *
+ *      _NO_FDISK_PRESENT
+ *              If the fdisk table is absent, it is assumed that the entire
+ *              media is allocated for a single operating system.
+ *
+ * _HAVE_TEM_FIRMWARE
+ *	Defined if this architecture has the (fallback) option of
+ *	using prom_* calls for doing I/O if a suitable kernel driver
+ *	is not available to do it.
+ *
+ * _DONT_USE_1275_GENERIC_NAMES
+ *		Controls whether or not device tree node names should
+ *		comply with the IEEE 1275 "Generic Names" Recommended
+ *		Practice. With _DONT_USE_GENERIC_NAMES, device-specific
+ *		names identifying the particular device will be used.
+ *
+ * __i386_COMPAT
+ *	This indicates whether the i386 ABI is supported as a *non-native*
+ *	mode for the platform.  When this symbol is defined:
+ *	-	32-bit xstat-style system calls are enabled
+ *	-	32-bit xmknod-style system calls are enabled
+ *	-	32-bit system calls use i386 sizes -and- alignments
+ *
+ *	Note that this is NOT defined for the i386 native environment!
+ *
+ * __x86
+ *	This is ONLY a synonym for defined(__i386) || defined(__amd64)
+ *	which is useful only insofar as these two architectures share
+ *	common attributes.  Analogous to __sparc.
+ *
+ * _PSM_MODULES
+ *	This indicates whether or not the implementation uses PSM
+ *	modules for processor support, reading /etc/mach from inside
+ *	the kernel to extract a list.
+ *
+ * _RTC_CONFIG
+ *	This indicates whether or not the implementation uses /etc/rtc_config
+ *	to configure the real-time clock in the kernel.
+ *
+ * _UNIX_KRTLD
+ *	This indicates that the implementation uses a dynamically
+ *	linked unix + krtld to form the core kernel image at boot
+ *	time, or (in the absence of this symbol) a prelinked kernel image.
+ *
+ * _OBP
+ *	This indicates the firmware interface is OBP.
+ *
+ * _SOFT_HOSTID
+ *	This indicates that the implementation obtains the hostid
+ *	from the file /etc/hostid, rather than from hardware.
+ */
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * The following set of definitions characterize Solaris on AMD's
+ * 64-bit systems.
+ */
+#if defined(__x86_64) || defined(__amd64)
+
+#if !defined(__amd64)
+#define	__amd64		/* preferred guard */
+#endif
+
+#if !defined(__x86)
+#define	__x86
+#endif
+
+/*
+ * Define the appropriate "processor characteristics"
+ */
+#define	_LITTLE_ENDIAN
+#define	_STACK_GROWS_DOWNWARD
+#define	_LONG_LONG_LTOH
+#define	_BIT_FIELDS_LTOH
+#define	_IEEE_754
+#define	_CHAR_IS_SIGNED
+#define	_BOOL_ALIGNMENT			1
+#define	_CHAR_ALIGNMENT			1
+#define	_SHORT_ALIGNMENT		2
+#define	_INT_ALIGNMENT			4
+#define	_FLOAT_ALIGNMENT		4
+#define	_FLOAT_COMPLEX_ALIGNMENT	4
+#define	_LONG_ALIGNMENT			8
+#define	_LONG_LONG_ALIGNMENT		8
+#define	_DOUBLE_ALIGNMENT		8
+#define	_DOUBLE_COMPLEX_ALIGNMENT	8
+#define	_LONG_DOUBLE_ALIGNMENT		16
+#define	_LONG_DOUBLE_COMPLEX_ALIGNMENT	16
+#define	_POINTER_ALIGNMENT		8
+#define	_MAX_ALIGNMENT			16
+#define	_ALIGNMENT_REQUIRED		1
+
+/*
+ * Different alignment constraints for the i386 ABI in compatibility mode
+ */
+#define	_LONG_LONG_ALIGNMENT_32		4
+
+/*
+ * Define the appropriate "implementation choices".
+ */
+#if !defined(_LP64)
+#define	_LP64
+#endif
+#if !defined(_I32LPx) && defined(_KERNEL)
+#define	_I32LPx
+#endif
+#define	_MULTI_DATAMODEL
+#define	_SUNOS_VTOC_16
+#define	_DMA_USES_PHYSADDR
+#define	_FIRMWARE_NEEDS_FDISK
+#define	__i386_COMPAT
+#define	_PSM_MODULES
+#define	_RTC_CONFIG
+#define	_SOFT_HOSTID
+#define	_DONT_USE_1275_GENERIC_NAMES
+#define	_HAVE_CPUID_INSN
+
+/*
+ * The feature test macro __i386 is generic for all processors implementing
+ * the Intel 386 instruction set or a superset of it.  Specifically, this
+ * includes all members of the 386, 486, and Pentium family of processors.
+ */
+#elif defined(__i386) || defined(__i386__)
+
+#if !defined(__i386)
+#define	__i386
+#endif
+
+#if !defined(__x86)
+#define	__x86
+#endif
+
+/*
+ * Define the appropriate "processor characteristics"
+ */
+#define	_LITTLE_ENDIAN
+#define	_STACK_GROWS_DOWNWARD
+#define	_LONG_LONG_LTOH
+#define	_BIT_FIELDS_LTOH
+#define	_IEEE_754
+#define	_CHAR_IS_SIGNED
+#define	_BOOL_ALIGNMENT			1
+#define	_CHAR_ALIGNMENT			1
+#define	_SHORT_ALIGNMENT		2
+#define	_INT_ALIGNMENT			4
+#define	_FLOAT_ALIGNMENT		4
+#define	_FLOAT_COMPLEX_ALIGNMENT	4
+#define	_LONG_ALIGNMENT			4
+#define	_LONG_LONG_ALIGNMENT		4
+#define	_DOUBLE_ALIGNMENT		4
+#define	_DOUBLE_COMPLEX_ALIGNMENT	4
+#define	_LONG_DOUBLE_ALIGNMENT		4
+#define	_LONG_DOUBLE_COMPLEX_ALIGNMENT	4
+#define	_POINTER_ALIGNMENT		4
+#define	_MAX_ALIGNMENT			4
+#define	_ALIGNMENT_REQUIRED		0
+
+#define	_LONG_LONG_ALIGNMENT_32		_LONG_LONG_ALIGNMENT
+
+/*
+ * Define the appropriate "implementation choices".
+ */
+#define	_ILP32
+#if !defined(_I32LPx) && defined(_KERNEL)
+#define	_I32LPx
+#endif
+#define	_SUNOS_VTOC_16
+#define	_DMA_USES_PHYSADDR
+#define	_FIRMWARE_NEEDS_FDISK
+#define	_PSM_MODULES
+#define	_RTC_CONFIG
+#define	_SOFT_HOSTID
+#define	_DONT_USE_1275_GENERIC_NAMES
+#define	_HAVE_CPUID_INSN
+
+/*
+ * The following set of definitions characterize the Solaris on SPARC systems.
+ *
+ * The symbol __sparc indicates any of the SPARC family of processor
+ * architectures.  This includes SPARC V7, SPARC V8 and SPARC V9.
+ *
+ * The symbol __sparcv8 indicates the 32-bit SPARC V8 architecture as defined
+ * by Version 8 of the SPARC Architecture Manual.  (SPARC V7 is close enough
+ * to SPARC V8 for the former to be subsumed into the latter definition.)
+ *
+ * The symbol __sparcv9 indicates the 64-bit SPARC V9 architecture as defined
+ * by Version 9 of the SPARC Architecture Manual.
+ *
+ * The symbols __sparcv8 and __sparcv9 are mutually exclusive, and are only
+ * relevant when the symbol __sparc is defined.
+ */
+/*
+ * XXX Due to the existence of 5110166, "defined(__sparcv9)" needs to be added
+ * to support backwards builds.  This workaround should be removed in s10_71.
+ */
+#elif defined(__sparc) || defined(__sparcv9) || defined(__sparc__)
+#if !defined(__sparc)
+#define	__sparc
+#endif
+
+/*
+ * You can be 32-bit or 64-bit, but not both at the same time.
+ */
+#if defined(__sparcv8) && defined(__sparcv9)
+#error	"SPARC Versions 8 and 9 are mutually exclusive choices"
+#endif
+
+/*
+ * Existing compilers do not set __sparcv8.  Years will transpire before
+ * the compilers can be depended on to set the feature test macro. In
+ * the interim, we'll set it here on the basis of historical behaviour;
+ * if you haven't asked for SPARC V9, then you must've meant SPARC V8.
+ */
+#if !defined(__sparcv9) && !defined(__sparcv8)
+#define	__sparcv8
+#endif
+
+/*
+ * Define the appropriate "processor characteristics" shared between
+ * all Solaris on SPARC systems.
+ */
+#define	_BIG_ENDIAN
+#define	_STACK_GROWS_DOWNWARD
+#define	_LONG_LONG_HTOL
+#define	_BIT_FIELDS_HTOL
+#define	_IEEE_754
+#define	_CHAR_IS_SIGNED
+#define	_BOOL_ALIGNMENT			1
+#define	_CHAR_ALIGNMENT			1
+#define	_SHORT_ALIGNMENT		2
+#define	_INT_ALIGNMENT			4
+#define	_FLOAT_ALIGNMENT		4
+#define	_FLOAT_COMPLEX_ALIGNMENT	4
+#define	_LONG_LONG_ALIGNMENT		8
+#define	_DOUBLE_ALIGNMENT		8
+#define	_DOUBLE_COMPLEX_ALIGNMENT	8
+#define	_ALIGNMENT_REQUIRED		1
+
+/*
+ * Define the appropriate "implementation choices" shared between versions.
+ */
+#define	_SUNOS_VTOC_8
+#define	_DMA_USES_VIRTADDR
+#define	_NO_FDISK_PRESENT
+#define	_HAVE_TEM_FIRMWARE
+#define	_OBP
+
+/*
+ * The following set of definitions characterize the implementation of
+ * 32-bit Solaris on SPARC V8 systems.
+ */
+#if defined(__sparcv8)
+
+/*
+ * Define the appropriate "processor characteristics"
+ */
+#define	_LONG_ALIGNMENT			4
+#define	_LONG_DOUBLE_ALIGNMENT		8
+#define	_LONG_DOUBLE_COMPLEX_ALIGNMENT	8
+#define	_POINTER_ALIGNMENT		4
+#define	_MAX_ALIGNMENT			8
+
+#define	_LONG_LONG_ALIGNMENT_32		_LONG_LONG_ALIGNMENT
+
+/*
+ * Define the appropriate "implementation choices"
+ */
+#define	_ILP32
+#if !defined(_I32LPx) && defined(_KERNEL)
+#define	_I32LPx
+#endif
+
+/*
+ * The following set of definitions characterize the implementation of
+ * 64-bit Solaris on SPARC V9 systems.
+ */
+#elif defined(__sparcv9)
+
+/*
+ * Define the appropriate "processor characteristics"
+ */
+#define	_LONG_ALIGNMENT			8
+#define	_LONG_DOUBLE_ALIGNMENT		16
+#define	_LONG_DOUBLE_COMPLEX_ALIGNMENT	16
+#define	_POINTER_ALIGNMENT		8
+#define	_MAX_ALIGNMENT			16
+
+#define	_LONG_LONG_ALIGNMENT_32		_LONG_LONG_ALIGNMENT
+
+/*
+ * Define the appropriate "implementation choices"
+ */
+#if !defined(_LP64)
+#define	_LP64
+#endif
+#if !defined(_I32LPx)
+#define	_I32LPx
+#endif
+#define	_MULTI_DATAMODEL
+
+#else
+#error	"unknown SPARC version"
+#endif
+
+/*
+ * #error is strictly ansi-C, but works as well as anything for K&R systems.
+ */
+#else
+#error "ISA not supported"
+#endif
+
+#if defined(_ILP32) && defined(_LP64)
+#error "Both _ILP32 and _LP64 are defined"
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ISA_DEFS_H */
diff --git a/uts/common/sys/list.h b/uts/common/sys/list.h
new file mode 100644
index 000000000000..8339b6226d11
--- /dev/null
+++ b/uts/common/sys/list.h
@@ -0,0 +1,67 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_LIST_H
+#define	_SYS_LIST_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/list_impl.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct list_node list_node_t;
+typedef struct list list_t;
+
+void list_create(list_t *, size_t, size_t);
+void list_destroy(list_t *);
+
+void list_insert_after(list_t *, void *, void *);
+void list_insert_before(list_t *, void *, void *);
+void list_insert_head(list_t *, void *);
+void list_insert_tail(list_t *, void *);
+void list_remove(list_t *, void *);
+void *list_remove_head(list_t *);
+void *list_remove_tail(list_t *);
+void list_move_tail(list_t *, list_t *);
+
+void *list_head(list_t *);
+void *list_tail(list_t *);
+void *list_next(list_t *, void *);
+void *list_prev(list_t *, void *);
+int list_is_empty(list_t *);
+
+void list_link_init(list_node_t *);
+void list_link_replace(list_node_t *, list_node_t *);
+
+int list_link_active(list_node_t *);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_LIST_H */
diff --git a/uts/common/sys/list_impl.h b/uts/common/sys/list_impl.h
new file mode 100644
index 000000000000..9c42f8832023
--- /dev/null
+++ b/uts/common/sys/list_impl.h
@@ -0,0 +1,53 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_LIST_IMPL_H
+#define	_SYS_LIST_IMPL_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/types.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct list_node {
+	struct list_node *list_next;
+	struct list_node *list_prev;
+};
+
+struct list {
+	size_t	list_size;
+	size_t	list_offset;
+	struct list_node list_head;
+};
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_LIST_IMPL_H */
diff --git a/uts/common/sys/note.h b/uts/common/sys/note.h
new file mode 100644
index 000000000000..2cb7fd89b7dd
--- /dev/null
+++ b/uts/common/sys/note.h
@@ -0,0 +1,56 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 1994 by Sun Microsystems, Inc.
+ */
+
+/*
+ * sys/note.h:	interface for annotating source with info for tools
+ *
+ * This is the underlying interface; NOTE (/usr/include/note.h) is the
+ * preferred interface, but all exported header files should include this
+ * file directly and use _NOTE so as not to take "NOTE" from the user's
+ * namespace.  For consistency, *all* kernel source should use _NOTE.
+ *
+ * By default, annotations expand to nothing.  This file implements
+ * that.  Tools using annotations will interpose a different version
+ * of this file that will expand annotations as needed.
+ */
+
+#ifndef	_SYS_NOTE_H
+#define	_SYS_NOTE_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#ifndef _NOTE
+#define	_NOTE(s)
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_NOTE_H */
diff --git a/uts/common/sys/nvpair.h b/uts/common/sys/nvpair.h
new file mode 100644
index 000000000000..30ff4e0667b3
--- /dev/null
+++ b/uts/common/sys/nvpair.h
@@ -0,0 +1,281 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_NVPAIR_H
+#define	_SYS_NVPAIR_H
+
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/va_list.h>
+
+#if defined(_KERNEL) && !defined(_BOOT)
+#include <sys/kmem.h>
+#endif
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+	DATA_TYPE_UNKNOWN = 0,
+	DATA_TYPE_BOOLEAN,
+	DATA_TYPE_BYTE,
+	DATA_TYPE_INT16,
+	DATA_TYPE_UINT16,
+	DATA_TYPE_INT32,
+	DATA_TYPE_UINT32,
+	DATA_TYPE_INT64,
+	DATA_TYPE_UINT64,
+	DATA_TYPE_STRING,
+	DATA_TYPE_BYTE_ARRAY,
+	DATA_TYPE_INT16_ARRAY,
+	DATA_TYPE_UINT16_ARRAY,
+	DATA_TYPE_INT32_ARRAY,
+	DATA_TYPE_UINT32_ARRAY,
+	DATA_TYPE_INT64_ARRAY,
+	DATA_TYPE_UINT64_ARRAY,
+	DATA_TYPE_STRING_ARRAY,
+	DATA_TYPE_HRTIME,
+	DATA_TYPE_NVLIST,
+	DATA_TYPE_NVLIST_ARRAY,
+	DATA_TYPE_BOOLEAN_VALUE,
+	DATA_TYPE_INT8,
+	DATA_TYPE_UINT8,
+	DATA_TYPE_BOOLEAN_ARRAY,
+	DATA_TYPE_INT8_ARRAY,
+#if !defined(_KERNEL)
+	DATA_TYPE_UINT8_ARRAY,
+	DATA_TYPE_DOUBLE
+#else
+	DATA_TYPE_UINT8_ARRAY
+#endif
+} data_type_t;
+
+typedef struct nvpair {
+	int32_t nvp_size;	/* size of this nvpair */
+	int16_t	nvp_name_sz;	/* length of name string */
+	int16_t	nvp_reserve;	/* not used */
+	int32_t	nvp_value_elem;	/* number of elements for array types */
+	data_type_t nvp_type;	/* type of value */
+	/* name string */
+	/* aligned ptr array for string arrays */
+	/* aligned array of data for value */
+} nvpair_t;
+
+/* nvlist header */
+typedef struct nvlist {
+	int32_t		nvl_version;
+	uint32_t	nvl_nvflag;	/* persistent flags */
+	uint64_t	nvl_priv;	/* ptr to private data if not packed */
+	uint32_t	nvl_flag;
+	int32_t		nvl_pad;	/* currently not used, for alignment */
+} nvlist_t;
+
+/* nvp implementation version */
+#define	NV_VERSION	0
+
+/* nvlist pack encoding */
+#define	NV_ENCODE_NATIVE	0
+#define	NV_ENCODE_XDR		1
+
+/* nvlist persistent unique name flags, stored in nvl_nvflags */
+#define	NV_UNIQUE_NAME		0x1
+#define	NV_UNIQUE_NAME_TYPE	0x2
+
+/* nvlist lookup pairs related flags */
+#define	NV_FLAG_NOENTOK		0x1
+
+/* convenience macros */
+#define	NV_ALIGN(x)		(((ulong_t)(x) + 7ul) & ~7ul)
+#define	NV_ALIGN4(x)		(((x) + 3) & ~3)
+
+#define	NVP_SIZE(nvp)		((nvp)->nvp_size)
+#define	NVP_NAME(nvp)		((char *)(nvp) + sizeof (nvpair_t))
+#define	NVP_TYPE(nvp)		((nvp)->nvp_type)
+#define	NVP_NELEM(nvp)		((nvp)->nvp_value_elem)
+#define	NVP_VALUE(nvp)		((char *)(nvp) + NV_ALIGN(sizeof (nvpair_t) \
+				+ (nvp)->nvp_name_sz))
+
+#define	NVL_VERSION(nvl)	((nvl)->nvl_version)
+#define	NVL_SIZE(nvl)		((nvl)->nvl_size)
+#define	NVL_FLAG(nvl)		((nvl)->nvl_flag)
+
+/* NV allocator framework */
+typedef struct nv_alloc_ops nv_alloc_ops_t;
+
+typedef struct nv_alloc {
+	const nv_alloc_ops_t *nva_ops;
+	void *nva_arg;
+} nv_alloc_t;
+
+struct nv_alloc_ops {
+	int (*nv_ao_init)(nv_alloc_t *, __va_list);
+	void (*nv_ao_fini)(nv_alloc_t *);
+	void *(*nv_ao_alloc)(nv_alloc_t *, size_t);
+	void (*nv_ao_free)(nv_alloc_t *, void *, size_t);
+	void (*nv_ao_reset)(nv_alloc_t *);
+};
+
+extern const nv_alloc_ops_t *nv_fixed_ops;
+extern nv_alloc_t *nv_alloc_nosleep;
+
+#if defined(_KERNEL) && !defined(_BOOT)
+extern nv_alloc_t *nv_alloc_sleep;
+#endif
+
+int nv_alloc_init(nv_alloc_t *, const nv_alloc_ops_t *, /* args */ ...);
+void nv_alloc_reset(nv_alloc_t *);
+void nv_alloc_fini(nv_alloc_t *);
+
+/* list management */
+int nvlist_alloc(nvlist_t **, uint_t, int);
+void nvlist_free(nvlist_t *);
+int nvlist_size(nvlist_t *, size_t *, int);
+int nvlist_pack(nvlist_t *, char **, size_t *, int, int);
+int nvlist_unpack(char *, size_t, nvlist_t **, int);
+int nvlist_dup(nvlist_t *, nvlist_t **, int);
+int nvlist_merge(nvlist_t *, nvlist_t *, int);
+
+uint_t nvlist_nvflag(nvlist_t *);
+
+int nvlist_xalloc(nvlist_t **, uint_t, nv_alloc_t *);
+int nvlist_xpack(nvlist_t *, char **, size_t *, int, nv_alloc_t *);
+int nvlist_xunpack(char *, size_t, nvlist_t **, nv_alloc_t *);
+int nvlist_xdup(nvlist_t *, nvlist_t **, nv_alloc_t *);
+nv_alloc_t *nvlist_lookup_nv_alloc(nvlist_t *);
+
+int nvlist_add_nvpair(nvlist_t *, nvpair_t *);
+int nvlist_add_boolean(nvlist_t *, const char *);
+int nvlist_add_boolean_value(nvlist_t *, const char *, boolean_t);
+int nvlist_add_byte(nvlist_t *, const char *, uchar_t);
+int nvlist_add_int8(nvlist_t *, const char *, int8_t);
+int nvlist_add_uint8(nvlist_t *, const char *, uint8_t);
+int nvlist_add_int16(nvlist_t *, const char *, int16_t);
+int nvlist_add_uint16(nvlist_t *, const char *, uint16_t);
+int nvlist_add_int32(nvlist_t *, const char *, int32_t);
+int nvlist_add_uint32(nvlist_t *, const char *, uint32_t);
+int nvlist_add_int64(nvlist_t *, const char *, int64_t);
+int nvlist_add_uint64(nvlist_t *, const char *, uint64_t);
+int nvlist_add_string(nvlist_t *, const char *, const char *);
+int nvlist_add_nvlist(nvlist_t *, const char *, nvlist_t *);
+int nvlist_add_boolean_array(nvlist_t *, const char *, boolean_t *, uint_t);
+int nvlist_add_byte_array(nvlist_t *, const char *, uchar_t *, uint_t);
+int nvlist_add_int8_array(nvlist_t *, const char *, int8_t *, uint_t);
+int nvlist_add_uint8_array(nvlist_t *, const char *, uint8_t *, uint_t);
+int nvlist_add_int16_array(nvlist_t *, const char *, int16_t *, uint_t);
+int nvlist_add_uint16_array(nvlist_t *, const char *, uint16_t *, uint_t);
+int nvlist_add_int32_array(nvlist_t *, const char *, int32_t *, uint_t);
+int nvlist_add_uint32_array(nvlist_t *, const char *, uint32_t *, uint_t);
+int nvlist_add_int64_array(nvlist_t *, const char *, int64_t *, uint_t);
+int nvlist_add_uint64_array(nvlist_t *, const char *, uint64_t *, uint_t);
+int nvlist_add_string_array(nvlist_t *, const char *, char *const *, uint_t);
+int nvlist_add_nvlist_array(nvlist_t *, const char *, nvlist_t **, uint_t);
+int nvlist_add_hrtime(nvlist_t *, const char *, hrtime_t);
+#if !defined(_KERNEL)
+int nvlist_add_double(nvlist_t *, const char *, double);
+#endif
+
+int nvlist_remove(nvlist_t *, const char *, data_type_t);
+int nvlist_remove_all(nvlist_t *, const char *);
+int nvlist_remove_nvpair(nvlist_t *, nvpair_t *);
+
+int nvlist_lookup_boolean(nvlist_t *, const char *);
+int nvlist_lookup_boolean_value(nvlist_t *, const char *, boolean_t *);
+int nvlist_lookup_byte(nvlist_t *, const char *, uchar_t *);
+int nvlist_lookup_int8(nvlist_t *, const char *, int8_t *);
+int nvlist_lookup_uint8(nvlist_t *, const char *, uint8_t *);
+int nvlist_lookup_int16(nvlist_t *, const char *, int16_t *);
+int nvlist_lookup_uint16(nvlist_t *, const char *, uint16_t *);
+int nvlist_lookup_int32(nvlist_t *, const char *, int32_t *);
+int nvlist_lookup_uint32(nvlist_t *, const char *, uint32_t *);
+int nvlist_lookup_int64(nvlist_t *, const char *, int64_t *);
+int nvlist_lookup_uint64(nvlist_t *, const char *, uint64_t *);
+int nvlist_lookup_string(nvlist_t *, const char *, char **);
+int nvlist_lookup_nvlist(nvlist_t *, const char *, nvlist_t **);
+int nvlist_lookup_boolean_array(nvlist_t *, const char *,
+    boolean_t **, uint_t *);
+int nvlist_lookup_byte_array(nvlist_t *, const char *, uchar_t **, uint_t *);
+int nvlist_lookup_int8_array(nvlist_t *, const char *, int8_t **, uint_t *);
+int nvlist_lookup_uint8_array(nvlist_t *, const char *, uint8_t **, uint_t *);
+int nvlist_lookup_int16_array(nvlist_t *, const char *, int16_t **, uint_t *);
+int nvlist_lookup_uint16_array(nvlist_t *, const char *, uint16_t **, uint_t *);
+int nvlist_lookup_int32_array(nvlist_t *, const char *, int32_t **, uint_t *);
+int nvlist_lookup_uint32_array(nvlist_t *, const char *, uint32_t **, uint_t *);
+int nvlist_lookup_int64_array(nvlist_t *, const char *, int64_t **, uint_t *);
+int nvlist_lookup_uint64_array(nvlist_t *, const char *, uint64_t **, uint_t *);
+int nvlist_lookup_string_array(nvlist_t *, const char *, char ***, uint_t *);
+int nvlist_lookup_nvlist_array(nvlist_t *, const char *,
+    nvlist_t ***, uint_t *);
+int nvlist_lookup_hrtime(nvlist_t *, const char *, hrtime_t *);
+int nvlist_lookup_pairs(nvlist_t *, int, ...);
+#if !defined(_KERNEL)
+int nvlist_lookup_double(nvlist_t *, const char *, double *);
+#endif
+
+int nvlist_lookup_nvpair(nvlist_t *, const char *, nvpair_t **);
+int nvlist_lookup_nvpair_embedded_index(nvlist_t *, const char *, nvpair_t **,
+    int *, char **);
+boolean_t nvlist_exists(nvlist_t *, const char *);
+boolean_t nvlist_empty(nvlist_t *);
+
+/* processing nvpair */
+nvpair_t *nvlist_next_nvpair(nvlist_t *, nvpair_t *);
+nvpair_t *nvlist_prev_nvpair(nvlist_t *, nvpair_t *);
+char *nvpair_name(nvpair_t *);
+data_type_t nvpair_type(nvpair_t *);
+int nvpair_type_is_array(nvpair_t *);
+int nvpair_value_boolean_value(nvpair_t *, boolean_t *);
+int nvpair_value_byte(nvpair_t *, uchar_t *);
+int nvpair_value_int8(nvpair_t *, int8_t *);
+int nvpair_value_uint8(nvpair_t *, uint8_t *);
+int nvpair_value_int16(nvpair_t *, int16_t *);
+int nvpair_value_uint16(nvpair_t *, uint16_t *);
+int nvpair_value_int32(nvpair_t *, int32_t *);
+int nvpair_value_uint32(nvpair_t *, uint32_t *);
+int nvpair_value_int64(nvpair_t *, int64_t *);
+int nvpair_value_uint64(nvpair_t *, uint64_t *);
+int nvpair_value_string(nvpair_t *, char **);
+int nvpair_value_nvlist(nvpair_t *, nvlist_t **);
+int nvpair_value_boolean_array(nvpair_t *, boolean_t **, uint_t *);
+int nvpair_value_byte_array(nvpair_t *, uchar_t **, uint_t *);
+int nvpair_value_int8_array(nvpair_t *, int8_t **, uint_t *);
+int nvpair_value_uint8_array(nvpair_t *, uint8_t **, uint_t *);
+int nvpair_value_int16_array(nvpair_t *, int16_t **, uint_t *);
+int nvpair_value_uint16_array(nvpair_t *, uint16_t **, uint_t *);
+int nvpair_value_int32_array(nvpair_t *, int32_t **, uint_t *);
+int nvpair_value_uint32_array(nvpair_t *, uint32_t **, uint_t *);
+int nvpair_value_int64_array(nvpair_t *, int64_t **, uint_t *);
+int nvpair_value_uint64_array(nvpair_t *, uint64_t **, uint_t *);
+int nvpair_value_string_array(nvpair_t *, char ***, uint_t *);
+int nvpair_value_nvlist_array(nvpair_t *, nvlist_t ***, uint_t *);
+int nvpair_value_hrtime(nvpair_t *, hrtime_t *);
+#if !defined(_KERNEL)
+int nvpair_value_double(nvpair_t *, double *);
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_NVPAIR_H */
diff --git a/uts/common/sys/nvpair_impl.h b/uts/common/sys/nvpair_impl.h
new file mode 100644
index 000000000000..f12dbbfe6ef5
--- /dev/null
+++ b/uts/common/sys/nvpair_impl.h
@@ -0,0 +1,73 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_NVPAIR_IMPL_H
+#define	_NVPAIR_IMPL_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <sys/nvpair.h>
+
+/*
+ * The structures here provided for information and debugging purposes only
+ * may be changed in the future.
+ */
+
+/*
+ * implementation linked list for pre-packed data
+ */
+typedef struct i_nvp i_nvp_t;
+
+struct i_nvp {
+	union {
+		uint64_t	_nvi_align;	/* ensure alignment */
+		struct {
+			i_nvp_t	*_nvi_next;	/* pointer to next nvpair */
+			i_nvp_t	*_nvi_prev;	/* pointer to prev nvpair */
+		} _nvi;
+	} _nvi_un;
+	nvpair_t nvi_nvp;			/* nvpair */
+};
+#define	nvi_next	_nvi_un._nvi._nvi_next
+#define	nvi_prev	_nvi_un._nvi._nvi_prev
+
+typedef struct {
+	i_nvp_t		*nvp_list;	/* linked list of nvpairs */
+	i_nvp_t		*nvp_last;	/* last nvpair */
+	i_nvp_t		*nvp_curr;	/* current walker nvpair */
+	nv_alloc_t	*nvp_nva;	/* pluggable allocator */
+	uint32_t	nvp_stat;	/* internal state */
+} nvpriv_t;
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _NVPAIR_IMPL_H */
diff --git a/uts/common/sys/processor.h b/uts/common/sys/processor.h
new file mode 100644
index 000000000000..c0fe6e21b85f
--- /dev/null
+++ b/uts/common/sys/processor.h
@@ -0,0 +1,149 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ *	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
+ *	  All Rights Reserved
+ *
+ */
+
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_PROCESSOR_H
+#define	_SYS_PROCESSOR_H
+
+#include <sys/types.h>
+#include <sys/procset.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Definitions for p_online, processor_info & lgrp system calls.
+ */
+
+/*
+ * Type for an lgrpid
+ */
+typedef uint16_t lgrpid_t;
+
+/*
+ * Type for processor name (CPU number).
+ */
+typedef	int	processorid_t;
+typedef int	chipid_t;
+
+/*
+ * Flags and return values for p_online(2), and pi_state for processor_info(2).
+ * These flags are *not* for in-kernel examination of CPU states.
+ * See <sys/cpuvar.h> for appropriate informational functions.
+ */
+#define	P_OFFLINE	0x0001	/* processor is offline, as quiet as possible */
+#define	P_ONLINE	0x0002	/* processor is online */
+#define	P_STATUS	0x0003	/* value passed to p_online to request status */
+#define	P_FAULTED	0x0004	/* processor is offline, in faulted state */
+#define	P_POWEROFF	0x0005	/* processor is powered off */
+#define	P_NOINTR	0x0006	/* processor is online, but no I/O interrupts */
+#define	P_SPARE		0x0007	/* processor is offline, can be reactivated */
+#define	P_BAD		P_FAULTED	/* unused but defined by USL */
+#define	P_FORCED 	0x10000000	/* force processor offline */
+
+/*
+ * String names for processor states defined above.
+ */
+#define	PS_OFFLINE	"off-line"
+#define	PS_ONLINE	"on-line"
+#define	PS_FAULTED	"faulted"
+#define	PS_POWEROFF	"powered-off"
+#define	PS_NOINTR	"no-intr"
+#define	PS_SPARE	"spare"
+
+/*
+ * Structure filled in by processor_info(2). This structure
+ * SHOULD NOT BE MODIFIED. Changes to the structure would
+ * negate ABI compatibility.
+ *
+ * The string fields are guaranteed to contain a NULL.
+ *
+ * The pi_fputypes field contains a (possibly empty) comma-separated
+ * list of floating point identifier strings.
+ */
+#define	PI_TYPELEN	16	/* max size of CPU type string */
+#define	PI_FPUTYPE	32	/* max size of FPU types string */
+
+typedef struct {
+	int	pi_state;  			/* processor state, see above */
+	char	pi_processor_type[PI_TYPELEN];	/* ASCII CPU type */
+	char	pi_fputypes[PI_FPUTYPE];	/* ASCII FPU types */
+	int	pi_clock;			/* CPU clock freq in MHz */
+} processor_info_t;
+
+/*
+ * Binding values for processor_bind(2)
+ */
+#define	PBIND_NONE	-1	/* LWP/thread is not bound */
+#define	PBIND_QUERY	-2	/* don't set, just return the binding */
+#define	PBIND_HARD	-3	/* prevents offlining CPU (default) */
+#define	PBIND_SOFT	-4	/* allows offlining CPU */
+#define	PBIND_QUERY_TYPE	-5	/* Return binding type */
+
+/*
+ * User-level system call interface prototypes
+ */
+#ifndef _KERNEL
+#ifdef __STDC__
+
+extern int	p_online(processorid_t processorid, int flag);
+extern int	processor_info(processorid_t processorid,
+		    processor_info_t *infop);
+extern int	processor_bind(idtype_t idtype, id_t id,
+		    processorid_t processorid, processorid_t *obind);
+extern processorid_t getcpuid(void);
+extern lgrpid_t gethomelgroup(void);
+
+#else
+
+extern int	p_online();
+extern int	processor_info();
+extern int	processor_bind();
+extern processorid_t getcpuid();
+extern lgrpid_t gethomelgroup();
+
+#endif /* __STDC__ */
+
+#else   /* _KERNEL */
+
+/*
+ * Internal interface prototypes
+ */
+extern int	p_online_internal(processorid_t, int, int *);
+extern int	p_online_internal_locked(processorid_t, int, int *);
+
+#endif /* !_KERNEL */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* _SYS_PROCESSOR_H */
diff --git a/uts/common/sys/procset.h b/uts/common/sys/procset.h
new file mode 100644
index 000000000000..c3b58675746e
--- /dev/null
+++ b/uts/common/sys/procset.h
@@ -0,0 +1,160 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+
+#ifndef _SYS_PROCSET_H
+#define	_SYS_PROCSET_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.6 */
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#include <sys/feature_tests.h>
+#include <sys/types.h>
+#include <sys/signal.h>
+
+/*
+ *	This file defines the data needed to specify a set of
+ *	processes.  These types are used by the sigsend, sigsendset,
+ *	priocntl, priocntlset, waitid, evexit, and evexitset system
+ *	calls.
+ */
+#define	P_INITPID	1
+#define	P_INITUID	0
+#define	P_INITPGID	0
+
+
+/*
+ *	The following defines the values for an identifier type.  It
+ *	specifies the interpretation of an id value.  An idtype and
+ *	id together define a simple set of processes.
+ */
+typedef enum
+#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
+	idtype		/* pollutes XPG4.2 namespace */
+#endif
+		{
+	P_PID,		/* A process identifier.		*/
+	P_PPID,		/* A parent process identifier.		*/
+	P_PGID,		/* A process group (job control group)	*/
+			/* identifier.				*/
+	P_SID,		/* A session identifier.		*/
+	P_CID,		/* A scheduling class identifier.	*/
+	P_UID,		/* A user identifier.			*/
+	P_GID,		/* A group identifier.			*/
+	P_ALL,		/* All processes.			*/
+	P_LWPID,	/* An LWP identifier.			*/
+	P_TASKID,	/* A task identifier.			*/
+	P_PROJID,	/* A project identifier.		*/
+	P_POOLID,	/* A pool identifier.			*/
+	P_ZONEID,	/* A zone identifier.			*/
+	P_CTID,		/* A (process) contract identifier.	*/
+	P_CPUID,	/* CPU identifier.			*/
+	P_PSETID	/* Processor set identifier		*/
+} idtype_t;
+
+
+/*
+ *	The following defines the operations which can be performed to
+ *	combine two simple sets of processes to form another set of
+ *	processes.
+ */
+#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
+typedef enum idop {
+	POP_DIFF,	/* Set difference.  The processes which	*/
+			/* are in the left operand set and not	*/
+			/* in the right operand set.		*/
+	POP_AND,	/* Set disjunction.  The processes	*/
+			/* which are in both the left and right	*/
+			/* operand sets.			*/
+	POP_OR,		/* Set conjunction.  The processes	*/
+			/* which are in either the left or the	*/
+			/* right operand sets (or both).	*/
+	POP_XOR		/* Set exclusive or.  The processes 	*/
+			/* which are in either the left or	*/
+			/* right operand sets but not in both.	*/
+} idop_t;
+
+
+/*
+ *	The following structure is used to define a set of processes.
+ *	The set is defined in terms of two simple sets of processes
+ *	and an operator which operates on these two operand sets.
+ */
+typedef struct procset {
+	idop_t		p_op;	/* The operator connection the	*/
+				/* following two operands each	*/
+				/* of which is a simple set of	*/
+				/* processes.			*/
+
+	idtype_t	p_lidtype;
+				/* The type of the left operand	*/
+				/* simple set.			*/
+	id_t		p_lid;	/* The id of the left operand.	*/
+
+	idtype_t	p_ridtype;
+				/* The type of the right	*/
+				/* operand simple set.		*/
+	id_t		p_rid;	/* The id of the right operand.	*/
+} procset_t;
+
+/*
+ *	The following macro can be used to initialize a procset_t
+ *	structure.
+ */
+#define	setprocset(psp, op, ltype, lid, rtype, rid) \
+			(psp)->p_op		= (op); \
+			(psp)->p_lidtype	= (ltype); \
+			(psp)->p_lid		= (lid); \
+			(psp)->p_ridtype	= (rtype); \
+			(psp)->p_rid		= (rid);
+
+#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
+
+#ifdef _KERNEL
+
+struct proc;
+
+extern int dotoprocs(procset_t *, int (*)(), char *);
+extern int dotolwp(procset_t *, int (*)(), char *);
+extern int procinset(struct proc *, procset_t *);
+extern int sigsendproc(struct proc *, sigsend_t *);
+extern int sigsendset(procset_t *, sigsend_t *);
+extern boolean_t cur_inset_only(procset_t *);
+extern id_t getmyid(idtype_t);
+
+#endif	/* _KERNEL */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_PROCSET_H */
diff --git a/uts/common/sys/synch.h b/uts/common/sys/synch.h
new file mode 100644
index 000000000000..6431bf22bca0
--- /dev/null
+++ b/uts/common/sys/synch.h
@@ -0,0 +1,162 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_SYNCH_H
+#define	_SYS_SYNCH_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#ifndef _ASM
+#include <sys/types.h>
+#include <sys/int_types.h>
+#endif /* _ASM */
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#ifndef _ASM
+/*
+ * Thread and LWP mutexes have the same type
+ * definitions.
+ *
+ * NOTE:
+ *
+ * POSIX requires that <pthread.h> define the structures pthread_mutex_t
+ * and pthread_cond_t.  Although these structures are identical to mutex_t
+ * (lwp_mutex_t) and cond_t (lwp_cond_t), defined here, a typedef of these
+ * types would require including <synch.h> in <pthread.h>, pulling in
+ * non-posix symbols/constants, violating POSIX namespace restrictions.  Hence,
+ * pthread_mutex_t/pthread_cond_t have been redefined (in <sys/types.h>).
+ * Any modifications done to mutex_t/lwp_mutex_t or cond_t/lwp_cond_t must
+ * also be done to pthread_mutex_t/pthread_cond_t.
+ */
+typedef struct _lwp_mutex {
+	struct {
+		uint16_t	flag1;
+		uint8_t		flag2;
+		uint8_t		ceiling;
+		union {
+			uint16_t bcptype;
+			struct {
+				uint8_t	count_type1;
+				uint8_t	count_type2;
+			} mtype_rcount;
+		} mbcp_type_un;
+		uint16_t	magic;
+	} flags;
+	union {
+		struct {
+			uint8_t	pad[8];
+		} lock64;
+		struct {
+			uint32_t ownerpid;
+			uint32_t lockword;
+		} lock32;
+		upad64_t owner64;
+	} lock;
+	upad64_t data;
+} lwp_mutex_t;
+
+/*
+ * Thread and LWP condition variables have the same
+ * type definition.
+ * NOTE:
+ * The layout of the following structure should be kept in sync with the
+ * layout of pthread_cond_t in sys/types.h. See NOTE above for lwp_mutex_t.
+ */
+typedef struct _lwp_cond {
+	struct {
+		uint8_t		flag[4];
+		uint16_t 	type;
+		uint16_t 	magic;
+	} flags;
+	upad64_t data;
+} lwp_cond_t;
+
+/*
+ * LWP semaphores
+ */
+typedef struct _lwp_sema {
+	uint32_t	count;		/* semaphore count */
+	uint16_t 	type;
+	uint16_t 	magic;
+	uint8_t		flags[8];	/* last byte reserved for waiters */
+	upad64_t	data;		/* optional data */
+} lwp_sema_t;
+
+/*
+ * Thread and LWP rwlocks have the same type definition.
+ * NOTE: The layout of this structure should be kept in sync with the layout
+ * of the correponding structure of pthread_rwlock_t in sys/types.h.
+ * Also, because we have to deal with C++, there is an identical structure
+ * for rwlock_t in head/sync.h that we cannot change.
+ */
+typedef struct _lwp_rwlock {
+	int32_t		readers;	/* rwstate word */
+	uint16_t	type;
+	uint16_t	magic;
+	lwp_mutex_t	mutex;		/* used with process-shared rwlocks */
+	lwp_cond_t	readercv;	/* used only to indicate ownership */
+	lwp_cond_t	writercv;	/* used only to indicate ownership */
+} lwp_rwlock_t;
+
+#endif /* _ASM */
+/*
+ * Definitions of synchronization types.
+ */
+#define	USYNC_THREAD	0x00		/* private to a process */
+#define	USYNC_PROCESS	0x01		/* shared by processes */
+
+/* Keep the following values in sync with pthread.h */
+#define	LOCK_NORMAL		0x00		/* same as USYNC_THREAD */
+#define	LOCK_SHARED		0x01		/* same as USYNC_PROCESS */
+#define	LOCK_ERRORCHECK		0x02		/* error check lock */
+#define	LOCK_RECURSIVE		0x04		/* recursive lock */
+#define	LOCK_PRIO_INHERIT	0x10		/* priority inheritance lock */
+#define	LOCK_PRIO_PROTECT	0x20		/* priority ceiling lock */
+#define	LOCK_ROBUST		0x40		/* robust lock */
+
+/*
+ * USYNC_PROCESS_ROBUST is a deprecated historical type.  It is mapped
+ * into (USYNC_PROCESS | LOCK_ROBUST) by mutex_init().  Application code
+ * should be revised to use (USYNC_PROCESS | LOCK_ROBUST) rather than this.
+ */
+#define	USYNC_PROCESS_ROBUST	0x08
+
+/*
+ * lwp_mutex_t flags
+ */
+#define	LOCK_OWNERDEAD		0x1
+#define	LOCK_NOTRECOVERABLE	0x2
+#define	LOCK_INITED		0x4
+#define	LOCK_UNMAPPED		0x8
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_SYNCH_H */
diff --git a/uts/common/sys/sysevent.h b/uts/common/sys/sysevent.h
new file mode 100644
index 000000000000..2b2644197384
--- /dev/null
+++ b/uts/common/sys/sysevent.h
@@ -0,0 +1,283 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_SYSEVENT_H
+#define	_SYS_SYSEVENT_H
+
+#include <sys/nvpair.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#ifndef	NULL
+#if defined(_LP64) && !defined(__cplusplus)
+#define	NULL    0L
+#else
+#define	NULL	0
+#endif
+#endif
+
+/* Internal registration class and subclass */
+#define	EC_ALL		"register_all_classes"
+#define	EC_SUB_ALL	"register_all_subclasses"
+
+/*
+ * Event allocation/enqueuing sleep/nosleep flags
+ */
+#define	SE_SLEEP		0
+#define	SE_NOSLEEP		1
+
+/* Framework error codes */
+#define	SE_EINVAL		1	/* Invalid argument */
+#define	SE_ENOMEM		2	/* Unable to allocate memory */
+#define	SE_EQSIZE		3	/* Maximum event q size exceeded */
+#define	SE_EFAULT		4	/* Copy fault */
+#define	SE_NOTFOUND		5	/* Attribute not found */
+#define	SE_NO_TRANSPORT		6	/* sysevent transport down */
+
+/* Internal data types */
+
+#define	SE_DATA_TYPE_BYTE	DATA_TYPE_BYTE
+#define	SE_DATA_TYPE_INT16	DATA_TYPE_INT16
+#define	SE_DATA_TYPE_UINT16	DATA_TYPE_UINT16
+#define	SE_DATA_TYPE_INT32	DATA_TYPE_INT32
+#define	SE_DATA_TYPE_UINT32	DATA_TYPE_UINT32
+#define	SE_DATA_TYPE_INT64	DATA_TYPE_INT64
+#define	SE_DATA_TYPE_UINT64	DATA_TYPE_UINT64
+#define	SE_DATA_TYPE_STRING	DATA_TYPE_STRING
+#define	SE_DATA_TYPE_BYTES	DATA_TYPE_BYTE_ARRAY
+#define	SE_DATA_TYPE_TIME	DATA_TYPE_HRTIME
+
+#define	SE_KERN_PID	0
+
+#define	SUNW_VENDOR	"SUNW"
+#define	SE_USR_PUB	"usr:"
+#define	SE_KERN_PUB	"kern:"
+#define	SUNW_KERN_PUB	SUNW_VENDOR":"SE_KERN_PUB
+#define	SUNW_USR_PUB	SUNW_VENDOR":"SE_USR_PUB
+
+/*
+ * Event header and attribute value limits
+ */
+#define	MAX_ATTR_NAME	1024
+#define	MAX_STRING_SZ	1024
+#define	MAX_BYTE_ARRAY	1024
+
+#define	MAX_CLASS_LEN		64
+#define	MAX_SUBCLASS_LEN	64
+#define	MAX_PUB_LEN		128
+#define	MAX_CHNAME_LEN		128
+#define	MAX_SUBID_LEN		16
+
+/*
+ * Limit for the event payload size
+ */
+#define	MAX_EV_SIZE_LEN		(SHRT_MAX/4)
+
+/* Opaque sysevent_t data type */
+typedef void *sysevent_t;
+
+/* Opaque channel bind data type */
+typedef void evchan_t;
+
+/* sysevent attribute list */
+typedef nvlist_t sysevent_attr_list_t;
+
+/* sysevent attribute name-value pair */
+typedef nvpair_t sysevent_attr_t;
+
+/* Unique event identifier */
+typedef struct sysevent_id {
+	uint64_t eid_seq;
+	hrtime_t eid_ts;
+} sysevent_id_t;
+
+/* Event attribute value structures */
+typedef struct sysevent_bytes {
+	int32_t	size;
+	uchar_t	*data;
+} sysevent_bytes_t;
+
+typedef struct sysevent_value {
+	int32_t		value_type;		/* data type */
+	union {
+		uchar_t		sv_byte;
+		int16_t		sv_int16;
+		uint16_t	sv_uint16;
+		int32_t		sv_int32;
+		uint32_t	sv_uint32;
+		int64_t		sv_int64;
+		uint64_t	sv_uint64;
+		hrtime_t	sv_time;
+		char		*sv_string;
+		sysevent_bytes_t	sv_bytes;
+	} value;
+} sysevent_value_t;
+
+/*
+ * The following flags determine the memory allocation semantics to use for
+ * kernel event buffer allocation by userland and kernel versions of
+ * sysevent_evc_publish().
+ *
+ * EVCH_SLEEP and EVCH_NOSLEEP respectively map to KM_SLEEP and KM_NOSLEEP.
+ * EVCH_TRYHARD is a kernel-only publish flag that allow event allocation
+ * routines to use use alternate kmem caches in situations where free memory
+ * may be low.  Kernel callers of sysevent_evc_publish() must set flags to
+ * one of EVCH_SLEEP, EVCH_NOSLEEP or EVCH_TRYHARD.  Userland callers of
+ * sysevent_evc_publish() must set flags to one of EVCH_SLEEP or EVCH_NOSLEEP.
+ *
+ * EVCH_QWAIT determines whether or not we should wait for slots in the event
+ * queue at publication time.  EVCH_QWAIT may be used by kernel and userland
+ * publishers and must be used in conjunction with any of one of EVCH_SLEEP,
+ * EVCH_NOSLEEP or EVCH_TRYHARD (kernel-only).
+ */
+
+#define	EVCH_NOSLEEP	0x0001	/* No sleep on kmem_alloc() */
+#define	EVCH_SLEEP	0x0002	/* Sleep on kmem_alloc() */
+#define	EVCH_TRYHARD	0x0004	/* May use alternate kmem cache for alloc */
+#define	EVCH_QWAIT	0x0008	/* Wait for slot in event queue */
+
+/*
+ * Meaning of flags for subscribe. Bits 8 to 15 are dedicated to
+ * the consolidation private interface, so flags defined here are restricted
+ * to the LSB.
+ *
+ * EVCH_SUB_KEEP indicates that this subscription should persist even if
+ * this subscriber id should die unexpectedly; matching events will be
+ * queued (up to a limit) and will be delivered if/when we restart again
+ * with the same subscriber id.
+ */
+#define	EVCH_SUB_KEEP		0x01
+
+/*
+ * Subscriptions may be wildcarded, but we limit the number of
+ * wildcards permitted.
+ */
+#define	EVCH_WILDCARD_MAX	10
+
+/*
+ * Used in unsubscribe to indicate all subscriber ids for a channel.
+ */
+#define	EVCH_ALLSUB		"all_subs"
+
+/*
+ * Meaning of flags parameter of channel bind function
+ *
+ * EVCH_CREAT indicates to create a channel if not already present.
+ *
+ * EVCH_HOLD_PEND indicates that events should be published to this
+ * channel even if there are no matching subscribers present; when
+ * a subscriber belatedly binds to the channel and registers their
+ * subscriptions they will receive events that predate their bind.
+ * If the channel is closed, however, with no remaining bindings then
+ * the channel is destroyed.
+ *
+ * EVCH_HOLD_PEND_INDEF is a stronger version of EVCH_HOLD_PEND -
+ * even if the channel has no remaining bindings it will not be
+ * destroyed so long as events remain unconsumed.  This is suitable for
+ * use with short-lived event producers that may bind to (create) the
+ * channel and exit before the intended consumer has started.
+ */
+#define	EVCH_CREAT		0x0001
+#define	EVCH_HOLD_PEND		0x0002
+#define	EVCH_HOLD_PEND_INDEF	0x0004
+#define	EVCH_B_FLAGS		0x0007	/* All valid bits */
+
+/*
+ * Meaning of commands of evc_control function
+ */
+#define	EVCH_GET_CHAN_LEN_MAX	 1	/* Get event queue length limit */
+#define	EVCH_GET_CHAN_LEN	 2	/* Get event queue length */
+#define	EVCH_SET_CHAN_LEN	 3	/* Set event queue length */
+#define	EVCH_CMD_LAST		 EVCH_SET_CHAN_LEN	/* Last command */
+
+/*
+ * Shared user/kernel event channel interface definitions
+ */
+extern int sysevent_evc_bind(const char *, evchan_t **, uint32_t);
+extern int sysevent_evc_unbind(evchan_t *);
+extern int sysevent_evc_subscribe(evchan_t *, const char *, const char *,
+    int (*)(sysevent_t *, void *), void *, uint32_t);
+extern int sysevent_evc_unsubscribe(evchan_t *, const char *);
+extern int sysevent_evc_publish(evchan_t *, const char *, const char *,
+    const char *, const char *, nvlist_t *, uint32_t);
+extern int sysevent_evc_control(evchan_t *, int, ...);
+extern int sysevent_evc_setpropnvl(evchan_t *, nvlist_t *);
+extern int sysevent_evc_getpropnvl(evchan_t *, nvlist_t **);
+
+#ifndef	_KERNEL
+
+/*
+ * Userland-only event channel interfaces
+ */
+
+#include <door.h>
+
+typedef struct sysevent_subattr sysevent_subattr_t;
+
+extern sysevent_subattr_t *sysevent_subattr_alloc(void);
+extern void sysevent_subattr_free(sysevent_subattr_t *);
+
+extern void sysevent_subattr_thrattr(sysevent_subattr_t *, pthread_attr_t *);
+extern void sysevent_subattr_sigmask(sysevent_subattr_t *, sigset_t *);
+
+extern void sysevent_subattr_thrcreate(sysevent_subattr_t *,
+    door_xcreate_server_func_t *, void *);
+extern void sysevent_subattr_thrsetup(sysevent_subattr_t *,
+    door_xcreate_thrsetup_func_t *, void *);
+
+extern int sysevent_evc_xsubscribe(evchan_t *, const char *, const char *,
+    int (*)(sysevent_t *, void *), void *, uint32_t, sysevent_subattr_t *);
+
+#else
+
+/*
+ * Kernel log_event interfaces.
+ */
+extern int log_sysevent(sysevent_t *, int, sysevent_id_t *);
+
+extern sysevent_t *sysevent_alloc(char *, char *, char *, int);
+extern void sysevent_free(sysevent_t *);
+extern int sysevent_add_attr(sysevent_attr_list_t **, char *,
+    sysevent_value_t *, int);
+extern void sysevent_free_attr(sysevent_attr_list_t *);
+extern int sysevent_attach_attributes(sysevent_t *, sysevent_attr_list_t *);
+extern void sysevent_detach_attributes(sysevent_t *);
+extern char *sysevent_get_class_name(sysevent_t *);
+extern char *sysevent_get_subclass_name(sysevent_t *);
+extern uint64_t sysevent_get_seq(sysevent_t *);
+extern void sysevent_get_time(sysevent_t *, hrtime_t *);
+extern size_t sysevent_get_size(sysevent_t *);
+extern char *sysevent_get_pub(sysevent_t *);
+extern int sysevent_get_attr_list(sysevent_t *, nvlist_t **);
+
+#endif	/* _KERNEL */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_SYSEVENT_H */
diff --git a/uts/common/sys/sysevent/dev.h b/uts/common/sys/sysevent/dev.h
new file mode 100644
index 000000000000..9d3107d09011
--- /dev/null
+++ b/uts/common/sys/sysevent/dev.h
@@ -0,0 +1,256 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_SYSEVENT_DEV_H
+#define	_SYS_SYSEVENT_DEV_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/sysevent/eventdefs.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Event schema for EC_DEV_ADD/ESC_DISK
+ *
+ *	Event Class 	- EC_DEV_ADD
+ *	Event Sub-Class - ESC_DISK
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- /dev name to the raw device.
+ *			  The name does not include the slice number component.
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path of the device without the "/devices"
+ *			  prefix.
+ *
+ *	Attribute Name	- DEV_DRIVER_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- driver name
+ *
+ *	Attribute Name	- DEV_INSTANCE
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- driver instance number
+ *
+ *	Attribute Name	- DEV_PROP_PREFIX<devinfo_node_property>
+ *	Attribute Type	- data type of the devinfo_node_property
+ *	Attribute Value	- value of the devinfo_node_property
+ *
+ *
+ * Event schema for EC_DEV_ADD/ESC_NETWORK
+ *
+ *	Event Class 	- EC_DEV_ADD
+ *	Event Sub-Class - ESC_NETWORK
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- /dev name associated with the device if exists.
+ *			  /dev name associated with the driver for DLPI
+ *			  Style-2 only drivers.
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path of the device without the "/devices"
+ *			  prefix.
+ *
+ *	Attribute Name	- DEV_DRIVER_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- driver name
+ *
+ *	Attribute Name	- DEV_INSTANCE
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- driver instance number
+ *
+ *	Attribute Name	- DEV_PROP_PREFIX<devinfo_node_property>
+ *	Attribute Type	- data type of the devinfo_node_property
+ *	Attribute Value	- value of the devinfo_node_property
+ *
+ *
+ * Event schema for EC_DEV_ADD/ESC_PRINTER
+ *
+ *	Event Class 	- EC_DEV_ADD
+ *	Event Sub-Class - ESC_PRINTER
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- /dev/printers name associated with the device
+ *			  if exists.
+ *			  /dev name associated with the device if it exists
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path of the device without the "/devices"
+ *			  prefix.
+ *
+ *	Attribute Name	- DEV_DRIVER_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- driver name
+ *
+ *	Attribute Name	- DEV_INSTANCE
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- driver instance number
+ *
+ *	Attribute Name	- DEV_PROP_PREFIX<devinfo_node_property>
+ *	Attribute Type	- data type of the devinfo_node_property
+ *	Attribute Value	- value of the devinfo_node_property
+ *
+ *
+ * Event schema for EC_DEV_REMOVE/ESC_DISK
+ *
+ *	Event Class 	- EC_DEV_REMOVE
+ *	Event Sub-Class - ESC_DISK
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- /dev name to the raw device.
+ *			  The name does not include the slice number component.
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path of the device without the "/devices"
+ *			  prefix.
+ *
+ *	Attribute Name	- DEV_DRIVER_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- driver name
+ *
+ *	Attribute Name	- DEV_INSTANCE
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- driver instance number
+ *
+ *
+ * Event schema for EC_DEV_REMOVE/ESC_NETWORK
+ *
+ *	Event Class 	- EC_DEV_REMOVE
+ *	Event Sub-Class - ESC_NETWORK
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- /dev name associated with the device if exists.
+ *			  /dev name associated with the driver for DLPI
+ *			  Style-2 only drivers.
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path of the device without the "/devices"
+ *			  prefix.
+ *
+ *	Attribute Name	- DEV_DRIVER_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- driver name
+ *
+ *	Attribute Name	- DEV_INSTANCE
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- driver instance number
+ *
+ *
+ * Event schema for EC_DEV_REMOVE/ESC_PRINTER
+ *
+ *	Event Class 	- EC_DEV_REMOVE
+ *	Event Sub-Class - ESC_PRINTER
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- /dev/printers name associated with the device
+ *			  if exists.
+ *			  /dev name associated with the device if it exists
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path of the device without the "/devices"
+ *			  prefix.
+ *
+ *	Attribute Name	- DEV_DRIVER_NAME
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- driver name
+ *
+ *	Attribute Name	- DEV_INSTANCE
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- driver instance number
+ *
+ *
+ * Event schema for EC_DEV_BRANCH/ESC_DEV_BRANCH_ADD or ESC_DEV_BRANCH_REMOVE
+ *
+ *	Event Class 	- EC_DEV_BRANCH
+ *	Event Sub-Class - ESC_DEV_BRANCH_ADD or ESC_DEV_BRANCH_REMOVE
+ *
+ *	Attribute Name	- EV_VERSION
+ *	Attribute Type	- DATA_TYPE_INT32
+ *	Attribute Value	- event version number
+ *
+ *	Attribute Name	- DEV_PHYS_PATH
+ *	Attribute Type	- DATA_TYPE_STRING
+ *	Attribute Value	- physical path to the root node of the device subtree
+ *			  without the "/devices" prefix.
+ */
+
+#define	EV_VERSION		"version"
+#define	DEV_PHYS_PATH		"phys_path"
+#define	DEV_NAME		"dev_name"
+#define	DEV_DRIVER_NAME		"driver_name"
+#define	DEV_INSTANCE		"instance"
+#define	DEV_PROP_PREFIX		"prop-"
+
+#define	EV_V1			1
+
+/* maximum number of devinfo node properties added to the event */
+#define	MAX_PROP_COUNT		100
+
+/* only properties with size less than PROP_LEN_LIMIT are added to the event */
+#define	PROP_LEN_LIMIT		1024
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_SYSEVENT_DEV_H */
diff --git a/uts/common/sys/sysevent/eventdefs.h b/uts/common/sys/sysevent/eventdefs.h
new file mode 100644
index 000000000000..3ed9bb298018
--- /dev/null
+++ b/uts/common/sys/sysevent/eventdefs.h
@@ -0,0 +1,275 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_SYSEVENT_EVENTDEFS_H
+#define	_SYS_SYSEVENT_EVENTDEFS_H
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * eventdefs.h contains public definitions for sysevent types (classes
+ * and subclasses).  All additions/removal/changes are subject
+ * to PSARC approval.
+ */
+
+/* Sysevent Class definitions */
+#define	EC_NONE		"EC_none"
+#define	EC_PRIV		"EC_priv"
+#define	EC_PLATFORM	"EC_platform"	/* events private to platform */
+#define	EC_DR		"EC_dr"	/* Dynamic reconfiguration event class */
+#define	EC_ENV		"EC_env"	/* Environmental monitor event class */
+#define	EC_DOMAIN	"EC_domain"	/* Domain event class */
+#define	EC_AP_DRIVER	"EC_ap_driver"	/* Alternate Pathing event class */
+#define	EC_IPMP		"EC_ipmp"	/* IP Multipathing event class */
+#define	EC_DEV_ADD	"EC_dev_add"	/* device add event class */
+#define	EC_DEV_REMOVE	"EC_dev_remove"	/* device remove event class */
+#define	EC_DEV_BRANCH	"EC_dev_branch"	/* device tree branch event class */
+#define	EC_DEV_STATUS	"EC_dev_status"	/* device status event class */
+#define	EC_FM		"EC_fm"		/* FMA error report event */
+#define	EC_ZFS		"EC_zfs"	/* ZFS event */
+#define	EC_DATALINK	"EC_datalink"	/* datalink event */
+#define	EC_VRRP		"EC_vrrp"	/* VRRP event */
+
+/*
+ * The following event class is reserved for exclusive use
+ * by Sun Cluster software.
+ */
+#define	EC_CLUSTER	"EC_Cluster"
+
+/*
+ * The following classes are exclusively reserved for use by the
+ * Solaris Volume Manager (SVM)
+ */
+#define	EC_SVM_CONFIG	"EC_SVM_Config"
+#define	EC_SVM_STATE	"EC_SVM_State"
+
+/*
+ * EC_SVM_CONFIG subclass definitions - supporting attributes (name/value pairs)
+ * are found in sys/sysevent/svm.h
+ */
+#define	ESC_SVM_CREATE		"ESC_SVM_Create"
+#define	ESC_SVM_DELETE		"ESC_SVM_Delete"
+#define	ESC_SVM_ADD		"ESC_SVM_Add"
+#define	ESC_SVM_REMOVE		"ESC_SVM_Remove"
+#define	ESC_SVM_REPLACE		"ESC_SVM_Replace"
+#define	ESC_SVM_GROW		"ESC_SVM_Grow"
+#define	ESC_SVM_RENAME_SRC	"ESC_SVM_Rename_Src"
+#define	ESC_SVM_RENAME_DST	"ESC_SVM_Rename_Dst"
+#define	ESC_SVM_MEDIATOR_ADD	"ESC_SVM_Mediator_Add"
+#define	ESC_SVM_MEDIATOR_DELETE	"ESC_SVM_Mediator_Delete"
+#define	ESC_SVM_HOST_ADD	"ESC_SVM_Host_Add"
+#define	ESC_SVM_HOST_DELETE	"ESC_SVM_Host_Delete"
+#define	ESC_SVM_DRIVE_ADD	"ESC_SVM_Drive_Add"
+#define	ESC_SVM_DRIVE_DELETE	"ESC_SVM_Drive_Delete"
+#define	ESC_SVM_DETACH		"ESC_SVM_Detach"
+#define	ESC_SVM_DETACHING	"ESC_SVM_Detaching"
+#define	ESC_SVM_ATTACH		"ESC_SVM_Attach"
+#define	ESC_SVM_ATTACHING	"ESC_SVM_Attaching"
+
+/*
+ * EC_SVM_STATE subclass definitions - supporting attributes (name/value pairs)
+ * are found in sys/sysevent/svm.h
+ */
+#define	ESC_SVM_INIT_START	"ESC_SVM_Init_Start"
+#define	ESC_SVM_INIT_FAILED	"ESC_SVM_Init_Failed"
+#define	ESC_SVM_INIT_FATAL	"ESC_SVM_Init_Fatal"
+#define	ESC_SVM_INIT_SUCCESS	"ESC_SVM_Init_Success"
+#define	ESC_SVM_IOERR		"ESC_SVM_Ioerr"
+#define	ESC_SVM_ERRED		"ESC_SVM_Erred"
+#define	ESC_SVM_LASTERRED	"ESC_SVM_Lasterred"
+#define	ESC_SVM_OK		"ESC_SVM_Ok"
+#define	ESC_SVM_ENABLE		"ESC_SVM_Enable"
+#define	ESC_SVM_RESYNC_START	"ESC_SVM_Resync_Start"
+#define	ESC_SVM_RESYNC_FAILED	"ESC_SVM_Resync_Failed"
+#define	ESC_SVM_RESYNC_SUCCESS	"ESC_SVM_Resync_Success"
+#define	ESC_SVM_RESYNC_DONE	"ESC_SVM_Resync_Done"
+#define	ESC_SVM_HOTSPARED	"ESC_SVM_Hotspared"
+#define	ESC_SVM_HS_FREED	"ESC_SVM_HS_Freed"
+#define	ESC_SVM_HS_CHANGED	"ESC_SVM_HS_Changed"
+#define	ESC_SVM_TAKEOVER	"ESC_SVM_Takeover"
+#define	ESC_SVM_RELEASE		"ESC_SVM_Release"
+#define	ESC_SVM_OPEN_FAIL	"ESC_SVM_Open_Fail"
+#define	ESC_SVM_OFFLINE		"ESC_SVM_Offline"
+#define	ESC_SVM_ONLINE		"ESC_SVM_Online"
+#define	ESC_SVM_CHANGE		"ESC_SVM_Change"
+#define	ESC_SVM_EXCHANGE	"ESC_SVM_Exchange"
+#define	ESC_SVM_REGEN_START	"ESC_SVM_Regen_Start"
+#define	ESC_SVM_REGEN_DONE	"ESC_SVM_Regen_Done"
+#define	ESC_SVM_REGEN_FAILED	"ESC_SVM_Regen_Failed"
+
+/*
+ * EC_DR subclass definitions - supporting attributes (name/value pairs)
+ * are found in sys/sysevent/dr.h
+ */
+
+/* Attachment point state change */
+#define	ESC_DR_AP_STATE_CHANGE	"ESC_dr_ap_state_change"
+#define	ESC_DR_REQ		"ESC_dr_req"	/* Request DR */
+#define	ESC_DR_TARGET_STATE_CHANGE	"ESC_dr_target_state_change"
+
+/*
+ * EC_ENV subclass definitions - supporting attributes (name/value pairs)
+ * are found in sys/sysevent/env.h
+ */
+#define	ESC_ENV_TEMP	"ESC_env_temp"	/* Temperature change event subclass */
+#define	ESC_ENV_FAN	"ESC_env_fan"	/* Fan status change event subclass */
+#define	ESC_ENV_POWER	"ESC_env_power"	/* Power supply change event subclass */
+#define	ESC_ENV_LED	"ESC_env_led"	/* LED change event subclass */
+
+/*
+ * EC_DOMAIN subclass definitions - supporting attributes (name/value pairs)
+ * are found in sys/sysevent/domain.h
+ */
+
+/* Domain state change */
+#define	ESC_DOMAIN_STATE_CHANGE		"ESC_domain_state_change"
+/* Domain loghost name change */
+#define	ESC_DOMAIN_LOGHOST_CHANGE	"ESC_domain_loghost_change"
+
+/*
+ * EC_AP_DRIVER subclass definitions - supporting attributes (name/value pairs)
+ * are found in sys/sysevent/ap_driver.h
+ */
+
+/* Alternate Pathing path switch */
+#define	ESC_AP_DRIVER_PATHSWITCH	"ESC_ap_driver_pathswitch"
+/* Alternate Pathing database commit */
+#define	ESC_AP_DRIVER_COMMIT		"ESC_ap_driver_commit"
+/* Alternate Pathing physical path status change */
+#define	ESC_AP_DRIVER_PHYS_PATH_STATUS_CHANGE	\
+	"ESC_ap_driver_phys_path_status_change"
+
+/*
+ * EC_IPMP subclass definitions - supporting attributes (name/value pairs)
+ * are found in sys/sysevent/ipmp.h
+ */
+
+/* IPMP group has changed state */
+#define	ESC_IPMP_GROUP_STATE		"ESC_ipmp_group_state"
+
+/* IPMP group has been created or removed */
+#define	ESC_IPMP_GROUP_CHANGE		"ESC_ipmp_group_change"
+
+/* IPMP group has had an interface added or removed */
+#define	ESC_IPMP_GROUP_MEMBER_CHANGE	"ESC_ipmp_group_member_change"
+
+/* Interface within an IPMP group has changed state or type */
+#define	ESC_IPMP_IF_CHANGE		"ESC_ipmp_if_change"
+
+/* IPMP probe has changed state */
+#define	ESC_IPMP_PROBE_STATE		"ESC_ipmp_probe_state"
+
+/*
+ * EC_DEV_ADD and EC_DEV_REMOVE subclass definitions - supporting attributes
+ * (name/value pairs) are found in sys/sysevent/dev.h
+ */
+#define	ESC_DISK	"disk"		/* disk device */
+#define	ESC_NETWORK	"network"	/* network interface */
+#define	ESC_PRINTER	"printer"	/* printer device */
+#define	ESC_LOFI	"lofi"		/* lofi device */
+
+/*
+ * EC_DEV_BRANCH subclass definitions - supporting attributes (name/value pairs)
+ * are found in sys/sysevent/dev.h
+ */
+
+/* device tree branch added */
+#define	ESC_DEV_BRANCH_ADD	"ESC_dev_branch_add"
+
+/* device tree branch removed */
+#define	ESC_DEV_BRANCH_REMOVE	"ESC_dev_branch_remove"
+
+/*
+ * EC_DEV_STATUS subclass definitions
+ *
+ * device capacity dynamically changed
+ */
+#define	ESC_DEV_DLE		"ESC_dev_dle"
+
+/* LUN has received an eject request from the user */
+#define	ESC_DEV_EJECT_REQUEST	"ESC_dev_eject_request"
+
+/* FMA Fault and Error event protocol subclass */
+#define	ESC_FM_ERROR		"ESC_FM_error"
+#define	ESC_FM_ERROR_REPLAY	"ESC_FM_error_replay"
+
+/* Service processor subclass definitions */
+#define	ESC_PLATFORM_SP_RESET	"ESC_platform_sp_reset"
+
+/*
+ * EC_PWRCTL subclass definitions
+ */
+#define	EC_PWRCTL			"EC_pwrctl"
+#define	ESC_PWRCTL_ADD			"ESC_pwrctl_add"
+#define	ESC_PWRCTL_REMOVE		"ESC_pwrctl_remove"
+#define	ESC_PWRCTL_WARN			"ESC_pwrctl_warn"
+#define	ESC_PWRCTL_LOW			"ESC_pwrctl_low"
+#define	ESC_PWRCTL_STATE_CHANGE		"ESC_pwrctl_state_change"
+#define	ESC_PWRCTL_POWER_BUTTON		"ESC_pwrctl_power_button"
+#define	ESC_PWRCTL_BRIGHTNESS_UP	"ESC_pwrctl_brightness_up"
+#define	ESC_PWRCTL_BRIGHTNESS_DOWN	"ESC_pwrctl_brightness_down"
+
+/* EC_ACPIEV subclass definitions */
+#define	EC_ACPIEV			"EC_acpiev"
+#define	ESC_ACPIEV_DISPLAY_SWITCH	"ESC_acpiev_display_switch"
+#define	ESC_ACPIEV_SCREEN_LOCK		"ESC_acpiev_screen_lock"
+#define	ESC_ACPIEV_SLEEP		"ESC_acpiev_sleep"
+#define	ESC_ACPIEV_AUDIO_MUTE		"ESC_acpiev_audio_mute"
+#define	ESC_ACPIEV_WIFI			"ESC_acpiev_wifi"
+#define	ESC_ACPIEV_TOUCHPAD		"ESC_acpiev_touchpad"
+
+/*
+ * ZFS subclass definitions.  supporting attributes (name/value paris) are found
+ * in sys/fs/zfs.h
+ */
+#define	ESC_ZFS_RESILVER_START		"ESC_ZFS_resilver_start"
+#define	ESC_ZFS_RESILVER_FINISH		"ESC_ZFS_resilver_finish"
+#define	ESC_ZFS_VDEV_REMOVE		"ESC_ZFS_vdev_remove"
+#define	ESC_ZFS_POOL_DESTROY		"ESC_ZFS_pool_destroy"
+#define	ESC_ZFS_VDEV_CLEAR		"ESC_ZFS_vdev_clear"
+#define	ESC_ZFS_VDEV_CHECK		"ESC_ZFS_vdev_check"
+#define	ESC_ZFS_CONFIG_SYNC		"ESC_ZFS_config_sync"
+#define	ESC_ZFS_SCRUB_START		"ESC_ZFS_scrub_start"
+#define	ESC_ZFS_SCRUB_FINISH		"ESC_ZFS_scrub_finish"
+#define	ESC_ZFS_VDEV_SPARE		"ESC_ZFS_vdev_spare"
+#define	ESC_ZFS_BOOTFS_VDEV_ATTACH	"ESC_ZFS_bootfs_vdev_attach"
+
+/*
+ * datalink subclass definitions.
+ */
+#define	ESC_DATALINK_PHYS_ADD	"ESC_datalink_phys_add"	/* new physical link */
+
+/*
+ * VRRP subclass definitions. Supporting attributes (name/value paris) are
+ * found in sys/sysevent/vrrp.h
+ */
+#define	ESC_VRRP_STATE_CHANGE	"ESC_vrrp_state_change"
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_SYSEVENT_EVENTDEFS_H */
diff --git a/uts/common/sys/sysmacros.h b/uts/common/sys/sysmacros.h
new file mode 100644
index 000000000000..89a672db2f8c
--- /dev/null
+++ b/uts/common/sys/sysmacros.h
@@ -0,0 +1,378 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_SYSMACROS_H
+#define	_SYS_SYSMACROS_H
+
+#include <sys/param.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Some macros for units conversion
+ */
+/*
+ * Disk blocks (sectors) and bytes.
+ */
+#define	dtob(DD)	((DD) << DEV_BSHIFT)
+#define	btod(BB)	(((BB) + DEV_BSIZE - 1) >> DEV_BSHIFT)
+#define	btodt(BB)	((BB) >> DEV_BSHIFT)
+#define	lbtod(BB)	(((offset_t)(BB) + DEV_BSIZE - 1) >> DEV_BSHIFT)
+
+/* common macros */
+#ifndef MIN
+#define	MIN(a, b)	((a) < (b) ? (a) : (b))
+#endif
+#ifndef MAX
+#define	MAX(a, b)	((a) < (b) ? (b) : (a))
+#endif
+#ifndef ABS
+#define	ABS(a)		((a) < 0 ? -(a) : (a))
+#endif
+#ifndef	SIGNOF
+#define	SIGNOF(a)	((a) < 0 ? -1 : (a) > 0)
+#endif
+
+#ifdef _KERNEL
+
+/*
+ * Convert a single byte to/from binary-coded decimal (BCD).
+ */
+extern unsigned char byte_to_bcd[256];
+extern unsigned char bcd_to_byte[256];
+
+#define	BYTE_TO_BCD(x)	byte_to_bcd[(x) & 0xff]
+#define	BCD_TO_BYTE(x)	bcd_to_byte[(x) & 0xff]
+
+#endif	/* _KERNEL */
+
+/*
+ * WARNING: The device number macros defined here should not be used by device
+ * drivers or user software. Device drivers should use the device functions
+ * defined in the DDI/DKI interface (see also ddi.h). Application software
+ * should make use of the library routines available in makedev(3). A set of
+ * new device macros are provided to operate on the expanded device number
+ * format supported in SVR4. Macro versions of the DDI device functions are
+ * provided for use by kernel proper routines only. Macro routines bmajor(),
+ * major(), minor(), emajor(), eminor(), and makedev() will be removed or
+ * their definitions changed at the next major release following SVR4.
+ */
+
+#define	O_BITSMAJOR	7	/* # of SVR3 major device bits */
+#define	O_BITSMINOR	8	/* # of SVR3 minor device bits */
+#define	O_MAXMAJ	0x7f	/* SVR3 max major value */
+#define	O_MAXMIN	0xff	/* SVR3 max minor value */
+
+
+#define	L_BITSMAJOR32	14	/* # of SVR4 major device bits */
+#define	L_BITSMINOR32	18	/* # of SVR4 minor device bits */
+#define	L_MAXMAJ32	0x3fff	/* SVR4 max major value */
+#define	L_MAXMIN32	0x3ffff	/* MAX minor for 3b2 software drivers. */
+				/* For 3b2 hardware devices the minor is */
+				/* restricted to 256 (0-255) */
+
+#ifdef _LP64
+#define	L_BITSMAJOR	32	/* # of major device bits in 64-bit Solaris */
+#define	L_BITSMINOR	32	/* # of minor device bits in 64-bit Solaris */
+#define	L_MAXMAJ	0xfffffffful	/* max major value */
+#define	L_MAXMIN	0xfffffffful	/* max minor value */
+#else
+#define	L_BITSMAJOR	L_BITSMAJOR32
+#define	L_BITSMINOR	L_BITSMINOR32
+#define	L_MAXMAJ	L_MAXMAJ32
+#define	L_MAXMIN	L_MAXMIN32
+#endif
+
+#ifdef _KERNEL
+
+/* major part of a device internal to the kernel */
+
+#define	major(x)	(major_t)((((unsigned)(x)) >> O_BITSMINOR) & O_MAXMAJ)
+#define	bmajor(x)	(major_t)((((unsigned)(x)) >> O_BITSMINOR) & O_MAXMAJ)
+
+/* get internal major part of expanded device number */
+
+#define	getmajor(x)	(major_t)((((dev_t)(x)) >> L_BITSMINOR) & L_MAXMAJ)
+
+/* minor part of a device internal to the kernel */
+
+#define	minor(x)	(minor_t)((x) & O_MAXMIN)
+
+/* get internal minor part of expanded device number */
+
+#define	getminor(x)	(minor_t)((x) & L_MAXMIN)
+
+#else
+
+/* major part of a device external from the kernel (same as emajor below) */
+
+#define	major(x)	(major_t)((((unsigned)(x)) >> O_BITSMINOR) & O_MAXMAJ)
+
+/* minor part of a device external from the kernel  (same as eminor below) */
+
+#define	minor(x)	(minor_t)((x) & O_MAXMIN)
+
+#endif	/* _KERNEL */
+
+/* create old device number */
+
+#define	makedev(x, y) (unsigned short)(((x) << O_BITSMINOR) | ((y) & O_MAXMIN))
+
+/* make an new device number */
+
+#define	makedevice(x, y) (dev_t)(((dev_t)(x) << L_BITSMINOR) | ((y) & L_MAXMIN))
+
+
+/*
+ * emajor() allows kernel/driver code to print external major numbers
+ * eminor() allows kernel/driver code to print external minor numbers
+ */
+
+#define	emajor(x) \
+	(major_t)(((unsigned int)(x) >> O_BITSMINOR) > O_MAXMAJ) ? \
+	    NODEV : (((unsigned int)(x) >> O_BITSMINOR) & O_MAXMAJ)
+
+#define	eminor(x) \
+	(minor_t)((x) & O_MAXMIN)
+
+/*
+ * get external major and minor device
+ * components from expanded device number
+ */
+#define	getemajor(x)	(major_t)((((dev_t)(x) >> L_BITSMINOR) > L_MAXMAJ) ? \
+			    NODEV : (((dev_t)(x) >> L_BITSMINOR) & L_MAXMAJ))
+#define	geteminor(x)	(minor_t)((x) & L_MAXMIN)
+
+/*
+ * These are versions of the kernel routines for compressing and
+ * expanding long device numbers that don't return errors.
+ */
+#if (L_BITSMAJOR32 == L_BITSMAJOR) && (L_BITSMINOR32 == L_BITSMINOR)
+
+#define	DEVCMPL(x)	(x)
+#define	DEVEXPL(x)	(x)
+
+#else
+
+#define	DEVCMPL(x)	\
+	(dev32_t)((((x) >> L_BITSMINOR) > L_MAXMAJ32 || \
+	    ((x) & L_MAXMIN) > L_MAXMIN32) ? NODEV32 : \
+	    ((((x) >> L_BITSMINOR) << L_BITSMINOR32) | ((x) & L_MAXMIN32)))
+
+#define	DEVEXPL(x)	\
+	(((x) == NODEV32) ? NODEV : \
+	makedevice(((x) >> L_BITSMINOR32) & L_MAXMAJ32, (x) & L_MAXMIN32))
+
+#endif /* L_BITSMAJOR32 ... */
+
+/* convert to old (SVR3.2) dev format */
+
+#define	cmpdev(x) \
+	(o_dev_t)((((x) >> L_BITSMINOR) > O_MAXMAJ || \
+	    ((x) & L_MAXMIN) > O_MAXMIN) ? NODEV : \
+	    ((((x) >> L_BITSMINOR) << O_BITSMINOR) | ((x) & O_MAXMIN)))
+
+/* convert to new (SVR4) dev format */
+
+#define	expdev(x) \
+	(dev_t)(((dev_t)(((x) >> O_BITSMINOR) & O_MAXMAJ) << L_BITSMINOR) | \
+	    ((x) & O_MAXMIN))
+
+/*
+ * Macro for checking power of 2 address alignment.
+ */
+#define	IS_P2ALIGNED(v, a) ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
+
+/*
+ * Macros for counting and rounding.
+ */
+#define	howmany(x, y)	(((x)+((y)-1))/(y))
+#define	roundup(x, y)	((((x)+((y)-1))/(y))*(y))
+
+/*
+ * Macro to determine if value is a power of 2
+ */
+#define	ISP2(x)		(((x) & ((x) - 1)) == 0)
+
+/*
+ * Macros for various sorts of alignment and rounding.  The "align" must
+ * be a power of 2.  Often times it is a block, sector, or page.
+ */
+
+/*
+ * return x rounded down to an align boundary
+ * eg, P2ALIGN(1200, 1024) == 1024 (1*align)
+ * eg, P2ALIGN(1024, 1024) == 1024 (1*align)
+ * eg, P2ALIGN(0x1234, 0x100) == 0x1200 (0x12*align)
+ * eg, P2ALIGN(0x5600, 0x100) == 0x5600 (0x56*align)
+ */
+#define	P2ALIGN(x, align)		((x) & -(align))
+
+/*
+ * return x % (mod) align
+ * eg, P2PHASE(0x1234, 0x100) == 0x34 (x-0x12*align)
+ * eg, P2PHASE(0x5600, 0x100) == 0x00 (x-0x56*align)
+ */
+#define	P2PHASE(x, align)		((x) & ((align) - 1))
+
+/*
+ * return how much space is left in this block (but if it's perfectly
+ * aligned, return 0).
+ * eg, P2NPHASE(0x1234, 0x100) == 0xcc (0x13*align-x)
+ * eg, P2NPHASE(0x5600, 0x100) == 0x00 (0x56*align-x)
+ */
+#define	P2NPHASE(x, align)		(-(x) & ((align) - 1))
+
+/*
+ * return x rounded up to an align boundary
+ * eg, P2ROUNDUP(0x1234, 0x100) == 0x1300 (0x13*align)
+ * eg, P2ROUNDUP(0x5600, 0x100) == 0x5600 (0x56*align)
+ */
+#define	P2ROUNDUP(x, align)		(-(-(x) & -(align)))
+
+/*
+ * return the ending address of the block that x is in
+ * eg, P2END(0x1234, 0x100) == 0x12ff (0x13*align - 1)
+ * eg, P2END(0x5600, 0x100) == 0x56ff (0x57*align - 1)
+ */
+#define	P2END(x, align)			(-(~(x) & -(align)))
+
+/*
+ * return x rounded up to the next phase (offset) within align.
+ * phase should be < align.
+ * eg, P2PHASEUP(0x1234, 0x100, 0x10) == 0x1310 (0x13*align + phase)
+ * eg, P2PHASEUP(0x5600, 0x100, 0x10) == 0x5610 (0x56*align + phase)
+ */
+#define	P2PHASEUP(x, align, phase)	((phase) - (((phase) - (x)) & -(align)))
+
+/*
+ * return TRUE if adding len to off would cause it to cross an align
+ * boundary.
+ * eg, P2BOUNDARY(0x1234, 0xe0, 0x100) == TRUE (0x1234 + 0xe0 == 0x1314)
+ * eg, P2BOUNDARY(0x1234, 0x50, 0x100) == FALSE (0x1234 + 0x50 == 0x1284)
+ */
+#define	P2BOUNDARY(off, len, align) \
+	(((off) ^ ((off) + (len) - 1)) > (align) - 1)
+
+/*
+ * Return TRUE if they have the same highest bit set.
+ * eg, P2SAMEHIGHBIT(0x1234, 0x1001) == TRUE (the high bit is 0x1000)
+ * eg, P2SAMEHIGHBIT(0x1234, 0x3010) == FALSE (high bit of 0x3010 is 0x2000)
+ */
+#define	P2SAMEHIGHBIT(x, y)		(((x) ^ (y)) < ((x) & (y)))
+
+/*
+ * Typed version of the P2* macros.  These macros should be used to ensure
+ * that the result is correctly calculated based on the data type of (x),
+ * which is passed in as the last argument, regardless of the data
+ * type of the alignment.  For example, if (x) is of type uint64_t,
+ * and we want to round it up to a page boundary using "PAGESIZE" as
+ * the alignment, we can do either
+ *	P2ROUNDUP(x, (uint64_t)PAGESIZE)
+ * or
+ *	P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t)
+ */
+#define	P2ALIGN_TYPED(x, align, type)	\
+	((type)(x) & -(type)(align))
+#define	P2PHASE_TYPED(x, align, type)	\
+	((type)(x) & ((type)(align) - 1))
+#define	P2NPHASE_TYPED(x, align, type)	\
+	(-(type)(x) & ((type)(align) - 1))
+#define	P2ROUNDUP_TYPED(x, align, type)	\
+	(-(-(type)(x) & -(type)(align)))
+#define	P2END_TYPED(x, align, type)	\
+	(-(~(type)(x) & -(type)(align)))
+#define	P2PHASEUP_TYPED(x, align, phase, type)	\
+	((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align)))
+#define	P2CROSS_TYPED(x, y, align, type)	\
+	(((type)(x) ^ (type)(y)) > (type)(align) - 1)
+#define	P2SAMEHIGHBIT_TYPED(x, y, type) \
+	(((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y)))
+
+/*
+ * Macros to atomically increment/decrement a variable.  mutex and var
+ * must be pointers.
+ */
+#define	INCR_COUNT(var, mutex) mutex_enter(mutex), (*(var))++, mutex_exit(mutex)
+#define	DECR_COUNT(var, mutex) mutex_enter(mutex), (*(var))--, mutex_exit(mutex)
+
+/*
+ * Macros to declare bitfields - the order in the parameter list is
+ * Low to High - that is, declare bit 0 first.  We only support 8-bit bitfields
+ * because if a field crosses a byte boundary it's not likely to be meaningful
+ * without reassembly in its nonnative endianness.
+ */
+#if defined(_BIT_FIELDS_LTOH)
+#define	DECL_BITFIELD2(_a, _b)				\
+	uint8_t _a, _b
+#define	DECL_BITFIELD3(_a, _b, _c)			\
+	uint8_t _a, _b, _c
+#define	DECL_BITFIELD4(_a, _b, _c, _d)			\
+	uint8_t _a, _b, _c, _d
+#define	DECL_BITFIELD5(_a, _b, _c, _d, _e)		\
+	uint8_t _a, _b, _c, _d, _e
+#define	DECL_BITFIELD6(_a, _b, _c, _d, _e, _f)		\
+	uint8_t _a, _b, _c, _d, _e, _f
+#define	DECL_BITFIELD7(_a, _b, _c, _d, _e, _f, _g)	\
+	uint8_t _a, _b, _c, _d, _e, _f, _g
+#define	DECL_BITFIELD8(_a, _b, _c, _d, _e, _f, _g, _h)	\
+	uint8_t _a, _b, _c, _d, _e, _f, _g, _h
+#elif defined(_BIT_FIELDS_HTOL)
+#define	DECL_BITFIELD2(_a, _b)				\
+	uint8_t _b, _a
+#define	DECL_BITFIELD3(_a, _b, _c)			\
+	uint8_t _c, _b, _a
+#define	DECL_BITFIELD4(_a, _b, _c, _d)			\
+	uint8_t _d, _c, _b, _a
+#define	DECL_BITFIELD5(_a, _b, _c, _d, _e)		\
+	uint8_t _e, _d, _c, _b, _a
+#define	DECL_BITFIELD6(_a, _b, _c, _d, _e, _f)		\
+	uint8_t _f, _e, _d, _c, _b, _a
+#define	DECL_BITFIELD7(_a, _b, _c, _d, _e, _f, _g)	\
+	uint8_t _g, _f, _e, _d, _c, _b, _a
+#define	DECL_BITFIELD8(_a, _b, _c, _d, _e, _f, _g, _h)	\
+	uint8_t _h, _g, _f, _e, _d, _c, _b, _a
+#else
+#error	One of _BIT_FIELDS_LTOH or _BIT_FIELDS_HTOL must be defined
+#endif  /* _BIT_FIELDS_LTOH */
+
+#if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof)
+
+/* avoid any possibility of clashing with <stddef.h> version */
+
+#define	offsetof(s, m)	((size_t)(&(((s *)0)->m)))
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_SYSMACROS_H */
diff --git a/uts/common/sys/taskq.h b/uts/common/sys/taskq.h
new file mode 100644
index 000000000000..8b601c86a598
--- /dev/null
+++ b/uts/common/sys/taskq.h
@@ -0,0 +1,92 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_TASKQ_H
+#define	_SYS_TASKQ_H
+
+#include <sys/types.h>
+#include <sys/thread.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#define	TASKQ_NAMELEN	31
+
+typedef struct taskq taskq_t;
+typedef uintptr_t taskqid_t;
+typedef void (task_func_t)(void *);
+
+struct proc;
+
+/*
+ * Public flags for taskq_create(): bit range 0-15
+ */
+#define	TASKQ_PREPOPULATE	0x0001	/* Prepopulate with threads and data */
+#define	TASKQ_CPR_SAFE		0x0002	/* Use CPR safe protocol */
+#define	TASKQ_DYNAMIC		0x0004	/* Use dynamic thread scheduling */
+#define	TASKQ_THREADS_CPU_PCT	0x0008	/* number of threads as % of ncpu */
+#define	TASKQ_DC_BATCH		0x0010	/* Taskq uses SDC in batch mode */
+
+/*
+ * Flags for taskq_dispatch. TQ_SLEEP/TQ_NOSLEEP should be same as
+ * KM_SLEEP/KM_NOSLEEP.
+ */
+#define	TQ_SLEEP	0x00	/* Can block for memory */
+#define	TQ_NOSLEEP	0x01	/* cannot block for memory; may fail */
+#define	TQ_NOQUEUE	0x02	/* Do not enqueue if can't dispatch */
+#define	TQ_NOALLOC	0x04	/* cannot allocate memory; may fail */
+#define	TQ_FRONT	0x08	/* Put task at the front of the queue */
+
+#ifdef _KERNEL
+
+extern taskq_t *system_taskq;
+
+extern void	taskq_init(void);
+extern void	taskq_mp_init(void);
+
+extern taskq_t	*taskq_create(const char *, int, pri_t, int, int, uint_t);
+extern taskq_t	*taskq_create_instance(const char *, int, int, pri_t, int,
+    int, uint_t);
+extern taskq_t	*taskq_create_proc(const char *, int, pri_t, int, int,
+    struct proc *, uint_t);
+extern taskq_t	*taskq_create_sysdc(const char *, int, int, int,
+    struct proc *, uint_t, uint_t);
+extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
+extern void	nulltask(void *);
+extern void	taskq_destroy(taskq_t *);
+extern void	taskq_wait(taskq_t *);
+extern void	taskq_suspend(taskq_t *);
+extern int	taskq_suspended(taskq_t *);
+extern void	taskq_resume(taskq_t *);
+extern int	taskq_member(taskq_t *, kthread_t *);
+
+#endif	/* _KERNEL */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_TASKQ_H */
diff --git a/uts/common/sys/u8_textprep.h b/uts/common/sys/u8_textprep.h
new file mode 100644
index 000000000000..e30f064b2d99
--- /dev/null
+++ b/uts/common/sys/u8_textprep.h
@@ -0,0 +1,113 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_U8_TEXTPREP_H
+#define	_SYS_U8_TEXTPREP_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/isa_defs.h>
+#include <sys/types.h>
+#include <sys/errno.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Unicode encoding conversion functions and their macros.
+ */
+#define	UCONV_IN_BIG_ENDIAN		0x0001
+#define	UCONV_OUT_BIG_ENDIAN		0x0002
+#define	UCONV_IN_SYSTEM_ENDIAN		0x0004
+#define	UCONV_OUT_SYSTEM_ENDIAN		0x0008
+#define	UCONV_IN_LITTLE_ENDIAN		0x0010
+#define	UCONV_OUT_LITTLE_ENDIAN		0x0020
+#define	UCONV_IGNORE_NULL		0x0040
+#define	UCONV_IN_ACCEPT_BOM		0x0080
+#define	UCONV_OUT_EMIT_BOM		0x0100
+
+extern int uconv_u16tou32(const uint16_t *, size_t *, uint32_t *, size_t *,
+	int);
+extern int uconv_u16tou8(const uint16_t *, size_t *, uchar_t *, size_t *, int);
+extern int uconv_u32tou16(const uint32_t *, size_t *, uint16_t *, size_t *,
+	int);
+extern int uconv_u32tou8(const uint32_t *, size_t *, uchar_t *, size_t *, int);
+extern int uconv_u8tou16(const uchar_t *, size_t *, uint16_t *, size_t *, int);
+extern int uconv_u8tou32(const uchar_t *, size_t *, uint32_t *, size_t *, int);
+
+/*
+ * UTF-8 text preparation functions and their macros.
+ *
+ * Among the macros defined, U8_CANON_DECOMP, U8_COMPAT_DECOMP, and
+ * U8_CANON_COMP are not public interfaces and must not be used directly
+ * at the flag input argument.
+ */
+#define	U8_STRCMP_CS			(0x00000001)
+#define	U8_STRCMP_CI_UPPER		(0x00000002)
+#define	U8_STRCMP_CI_LOWER		(0x00000004)
+
+#define	U8_CANON_DECOMP			(0x00000010)
+#define	U8_COMPAT_DECOMP		(0x00000020)
+#define	U8_CANON_COMP			(0x00000040)
+
+#define	U8_STRCMP_NFD			(U8_CANON_DECOMP)
+#define	U8_STRCMP_NFC			(U8_CANON_DECOMP | U8_CANON_COMP)
+#define	U8_STRCMP_NFKD			(U8_COMPAT_DECOMP)
+#define	U8_STRCMP_NFKC			(U8_COMPAT_DECOMP | U8_CANON_COMP)
+
+#define	U8_TEXTPREP_TOUPPER		(U8_STRCMP_CI_UPPER)
+#define	U8_TEXTPREP_TOLOWER		(U8_STRCMP_CI_LOWER)
+
+#define	U8_TEXTPREP_NFD			(U8_STRCMP_NFD)
+#define	U8_TEXTPREP_NFC			(U8_STRCMP_NFC)
+#define	U8_TEXTPREP_NFKD		(U8_STRCMP_NFKD)
+#define	U8_TEXTPREP_NFKC		(U8_STRCMP_NFKC)
+
+#define	U8_TEXTPREP_IGNORE_NULL		(0x00010000)
+#define	U8_TEXTPREP_IGNORE_INVALID	(0x00020000)
+#define	U8_TEXTPREP_NOWAIT		(0x00040000)
+
+#define	U8_UNICODE_320			(0)
+#define	U8_UNICODE_500			(1)
+#define	U8_UNICODE_LATEST		(U8_UNICODE_500)
+
+#define	U8_VALIDATE_ENTIRE		(0x00100000)
+#define	U8_VALIDATE_CHECK_ADDITIONAL	(0x00200000)
+#define	U8_VALIDATE_UCS2_RANGE		(0x00400000)
+
+#define	U8_ILLEGAL_CHAR			(-1)
+#define	U8_OUT_OF_RANGE_CHAR		(-2)
+
+extern int u8_validate(char *, size_t, char **, int, int *);
+extern int u8_strcmp(const char *, const char *, size_t, int, size_t, int *);
+extern size_t u8_textprep_str(char *, size_t *, char *, size_t *, int, size_t,
+	int *);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_U8_TEXTPREP_H */
diff --git a/uts/common/sys/u8_textprep_data.h b/uts/common/sys/u8_textprep_data.h
new file mode 100644
index 000000000000..de6866096160
--- /dev/null
+++ b/uts/common/sys/u8_textprep_data.h
@@ -0,0 +1,35376 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+/*
+ * COPYRIGHT AND PERMISSION NOTICE
+ *
+ * Copyright (c) 1991-2006 Unicode, Inc. All rights reserved. Distributed under
+ * the Terms of Use in http://www.unicode.org/copyright.html.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of the Unicode data files and any associated documentation (the
+ * "Data Files") or Unicode software and any associated documentation (the
+ * "Software") to deal in the Data Files or Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, and/or sell copies of the Data Files or Software, and
+ * to permit persons to whom the Data Files or Software are furnished to do so,
+ * provided that (a) the above copyright notice(s) and this permission notice
+ * appear with all copies of the Data Files or Software, (b) both the above
+ * copyright notice(s) and this permission notice appear in associated
+ * documentation, and (c) there is clear notice in each modified Data File or
+ * in the Software as well as in the documentation associated with the Data
+ * File(s) or Software that the data or software has been modified.
+ *
+ * THE DATA FILES AND SOFTWARE ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+ * KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
+ * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
+ * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR
+ * CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THE DATA FILES OR SOFTWARE.
+ *
+ * Except as contained in this notice, the name of a copyright holder shall not
+ * be used in advertising or otherwise to promote the sale, use or other
+ * dealings in these Data Files or Software without prior written authorization
+ * of the copyright holder.
+ *
+ * Unicode and the Unicode logo are trademarks of Unicode, Inc., and may be
+ * registered in some jurisdictions. All other trademarks and registered
+ * trademarks mentioned herein are the property of their respective owners.
+ */
+/*
+ * This file has been modified by Sun Microsystems, Inc.
+ */
+
+#ifndef _SYS_U8_TEXTPREP_DATA_H
+#define	_SYS_U8_TEXTPREP_DATA_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/types.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * To get to the combining class data, composition mappings, decomposition
+ * mappings, and case conversion mappings of Unicode, the data structures
+ * formulated and their meanings are like the following:
+ *
+ * Each UTF-8 character is seen as a 4-byte entity so that U+0061 (or 0x61 in
+ * UTF-8) would be seen as 0x00 0x00 0x00 0x61. Similarly, U+1D15E would be
+ * 0xF0 0x9D 0x85 0x9E in UTF-8.
+ *
+ * The first byte (MSB) value is an index to the b1_tbl, such as
+ * u8_common_b1_tbl and u8_composition_b1_tbl tables. A b1_tbl has
+ * indices to b2_tbl tables that have indices to b3_tbl. Each b3_tbl has
+ * either indices to b4_tbl or indices to b4_tbl and base values for
+ * displacement calculations later by using the u8_displacement_t type at
+ * below. Each b4_tbl table then has indices to the final tables.
+ *
+ * As an example, if we have a character with code value of U+1D15E which is
+ * 0xF0 0x9D 0x85 0x9E in UTF-8, the target decomposition character bytes
+ * that will be mapped by the mapping procedure would be the ones between
+ * the start_index and the end_index computed as like the following:
+ *
+ *	b2_tbl_id = u8_common_b1_tbl[0][0xF0];
+ *	b3_tbl_id = u8_decomp_b2_tbl[0][b2_tbl_id][0x9D];
+ *	b4_tbl_id = u8_decomp_b3_tbl[0][b3_tbl_id][0x85].tbl_id;
+ *	b4_base = u8_decomp_b3_tbl[0][b3_tbl_id][0x85].base;
+ *	if (b4_tbl_id >= 0x8000) {
+ *		b4_tbl_id -= 0x8000;
+ *      	start_index = u8_decomp_b4_16bit_tbl[0][b4_tbl_id][0x9E];
+ *      	end_index = u8_decomp_b4_16bit_tbl[0][b4_tbl_id][0x9E + 1];
+ *	} else {
+ *      	start_index = u8_decomp_b4_tbl[0][b4_tbl_id][0x9E];
+ *      	end_index = u8_decomp_b4_tbl[0][b4_tbl_id][0x9E + 1];
+ *	}
+ *
+ * The start_index and the end_index can be used to retrieve the bytes
+ * possibly of multiple UTF-8 characters from the final tables.
+ *
+ * The "[0]" at the above indicates this is for Unicode Version 3.2.0 data
+ * as of today.  Consequently, the "[1]" indicates another Unicode version
+ * data and it is Unicode 5.0.0 as of today.
+ *
+ * The mapping procedures and the data structures are more or less similar or
+ * alike among different mappings. You might want to read the u8_textprep.c
+ * for specific details.
+ *
+ * The tool programs created and used to generate the tables in this file are
+ * saved at PSARC/2007/149/materials/ as tools.tar.gz file.
+ */
+
+/* The following is a component type for the b4_tbl vectors. */
+typedef struct {
+	uint16_t	tbl_id;
+	uint16_t	base;
+} u8_displacement_t;
+
+/*
+ * The U8_TBL_ELEMENT_NOT_DEF macro indicates a byte that is not defined or
+ * used. The U8_TBL_ELEMENT_FILLER indicates the end of a UTF-8 character at
+ * the final tables.
+ */
+#define	U8_TBL_ELEMENT_NOT_DEF		(0xff)
+#define	N_				U8_TBL_ELEMENT_NOT_DEF
+
+#define	U8_TBL_ELEMENT_FILLER		(0xf7)
+#define	FIL_				U8_TBL_ELEMENT_FILLER
+
+/*
+ * The common b1_tbl for combining class, decompositions, tolower, and
+ * toupper case conversion mappings.
+ */
+static const uchar_t u8_common_b1_tbl[2][256] = {
+	{
+		0,  N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		1,  N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+	},
+	{
+		0,  N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		1,  N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+	},
+};
+
+static const uchar_t u8_combining_class_b2_tbl[2][2][256] = {
+	{
+		{
+			0,  N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			1,  2,  3,  4,  N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, 5,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, 6,  N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+
+	},
+	{
+		{
+			0,  N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			1,  2,  3,  4,  N_, N_, N_, N_,
+			N_, N_, 5,  N_, N_, N_, N_, 6,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			7,  N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, 8,  N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+
+	},
+
+};
+
+static const uchar_t u8_combining_class_b3_tbl[2][9][256] = {
+	{
+		{	/* Third byte table 0. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, 0,  1,  N_, N_,
+			N_, N_, 2,  N_, N_, N_, 3,  4,
+			N_, 5,  N_, 6,  7,  8,  N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 1. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, 9,  10, 11, 12,
+			13, 14, 15, 16, 17, 18, N_, 19,
+			N_, 20, N_, 21, N_, 22, N_, 23,
+			24, 25, 26, 27, 28, 29, 30, 31,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 2. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			32, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, 33, N_, N_, 34,
+			N_, N_, 35, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 3. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, 36, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 4. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			37, N_, 38, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 5. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, 39, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			40, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 6. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, 41, 42, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 7. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 8. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+	},
+	{
+		{	/* Third byte table 0. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, 0,  1,  N_, N_,
+			N_, N_, 2,  N_, N_, N_, 3,  4,
+			5,  6,  N_, 7,  8,  9,  N_, 10,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 1. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, 11, 12, 13, 14,
+			15, 16, 17, 18, 19, 20, N_, 21,
+			N_, 22, 23, 24, N_, 25, N_, 26,
+			27, 28, 29, 30, 31, 32, 33, 34,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 2. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			35, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, 36, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, 37, N_, N_, 38,
+			N_, N_, 39, N_, 40, N_, N_, N_,
+			41, N_, N_, N_, 42, 43, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, 44,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 3. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, 45, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 4. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			46, N_, 47, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 5. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			48, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 6. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, 49, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			50, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 7. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			51, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{	/* Third byte table 8. */
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, 52, 53, N_,
+			N_, 54, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+	},
+};
+
+/*
+ * Unlike other b4_tbl, the b4_tbl for combining class data has
+ * the combining class values not indices to the final tables.
+ */
+static const uchar_t u8_combining_class_b4_tbl[2][55][256] = {
+	{
+		{	/* Fourth byte table 0. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 230, 230, 230, 230, 230, 230, 230,
+			230, 230, 230, 230, 230, 230, 230, 230,
+			230, 230, 230, 230, 230, 232, 220, 220,
+			220, 220, 232, 216, 220, 220, 220, 220,
+			220, 202, 202, 220, 220, 220, 220, 202,
+			202, 220, 220, 220, 220, 220, 220, 220,
+			220, 220, 220, 220, 1,   1,   1,   1,
+			1,   220, 220, 220, 220, 230, 230, 230,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 1. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 230, 230, 230, 230, 240, 230, 220,
+			220, 220, 230, 230, 230, 220, 220, 0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			234, 234, 233, 230, 230, 230, 230, 230,
+			230, 230, 230, 230, 230, 230, 230, 230,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 2. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   230, 230, 230, 230, 0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 3. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   220, 230, 230, 230, 230, 220, 230,
+			230, 230, 222, 220, 230, 230, 230, 230,
+			230, 230, 0,   220, 220, 220, 220, 220,
+			230, 230, 220, 230, 230, 222, 228, 230,
+			10,  11,  12,  13,  14,  15,  16,  17,
+			18,  19,  0,   20,  21,  22,  0,   23,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 4. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   24,  25,  0,   230, 0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 5. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   27,  28,  29,  30,  31,
+			32,  33,  34,  230, 230, 220, 0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			35,  0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 6. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   230, 230,
+			230, 230, 230, 230, 230, 0,   0,   230,
+			230, 230, 230, 220, 230, 0,   0,   230,
+			230, 0,   220, 230, 230, 220, 0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 7. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   36,  0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 220, 230, 230, 220, 230, 230, 220,
+			220, 220, 230, 220, 220, 230, 220, 230,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 8. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 230, 220, 230, 220, 230, 220, 230,
+			220, 230, 230, 0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 9. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 10. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   230, 220, 230, 230, 0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 11. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 12. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 13. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 14. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 15. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 16. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 17. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 18. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 19. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 20. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   84,  91,  0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 21. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 22. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 23. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   9,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 24. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			103, 103, 9,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 25. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			107, 107, 107, 107, 0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 26. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			118, 118, 0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 27. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			122, 122, 122, 122, 0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 28. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			220, 220, 0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   220, 0,   220,
+			0,   216, 0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 29. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   129, 130, 0,   132, 0,   0,   0,
+			0,   0,   130, 130, 130, 130, 0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 30. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			130, 0,   230, 230, 9,   0,   230, 230,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 31. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   220, 0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 32. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   7,
+			0,   9,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 33. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   9,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   9,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 34. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   9,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 35. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   228, 0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 36. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 230, 1,   1,   230, 230, 230, 230,
+			1,   1,   1,   230, 230, 0,   0,   0,
+			0,   230, 0,   0,   0,   1,   1,   230,
+			220, 230, 1,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 37. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   218, 228, 232, 222, 224, 224,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 38. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   8,   8,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 39. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   26,  0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 40. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 230, 230, 230, 0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 41. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   216, 216, 1,
+			1,   1,   0,   0,   0,   226, 216, 216,
+			216, 216, 216, 0,   0,   0,   0,   0,
+			0,   0,   0,   220, 220, 220, 220, 220,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 42. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			220, 220, 220, 0,   0,   230, 230, 230,
+			230, 230, 220, 220, 0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   230, 230, 230, 230, 0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 43. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 44. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 45. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 46. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 47. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 48. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 49. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 50. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 51. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 52. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 53. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 54. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+	},
+	{
+		{	/* Fourth byte table 0. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 230, 230, 230, 230, 230, 230, 230,
+			230, 230, 230, 230, 230, 230, 230, 230,
+			230, 230, 230, 230, 230, 232, 220, 220,
+			220, 220, 232, 216, 220, 220, 220, 220,
+			220, 202, 202, 220, 220, 220, 220, 202,
+			202, 220, 220, 220, 220, 220, 220, 220,
+			220, 220, 220, 220, 1,   1,   1,   1,
+			1,   220, 220, 220, 220, 230, 230, 230,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 1. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 230, 230, 230, 230, 240, 230, 220,
+			220, 220, 230, 230, 230, 220, 220, 0,
+			230, 230, 230, 220, 220, 220, 220, 230,
+			232, 220, 220, 230, 233, 234, 234, 233,
+			234, 234, 233, 230, 230, 230, 230, 230,
+			230, 230, 230, 230, 230, 230, 230, 230,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 2. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   230, 230, 230, 230, 0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 3. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   220, 230, 230, 230, 230, 220, 230,
+			230, 230, 222, 220, 230, 230, 230, 230,
+			230, 230, 220, 220, 220, 220, 220, 220,
+			230, 230, 220, 230, 230, 222, 228, 230,
+			10,  11,  12,  13,  14,  15,  16,  17,
+			18,  19,  19,  20,  21,  22,  0,   23,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 4. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   24,  25,  0,   230, 220, 0,   18,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 5. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 230, 230, 230, 230, 230, 0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 6. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   27,  28,  29,  30,  31,
+			32,  33,  34,  230, 230, 220, 220, 230,
+			230, 230, 230, 230, 220, 230, 230, 0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			35,  0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 7. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   230, 230,
+			230, 230, 230, 230, 230, 0,   0,   230,
+			230, 230, 230, 220, 230, 0,   0,   230,
+			230, 0,   220, 230, 230, 220, 0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 8. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   36,  0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 220, 230, 230, 220, 230, 230, 220,
+			220, 220, 230, 220, 220, 230, 220, 230,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 9. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 230, 220, 230, 220, 230, 220, 230,
+			220, 230, 230, 0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 10. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   230, 230, 230, 230, 230,
+			230, 230, 220, 230, 0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 11. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 12. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   230, 220, 230, 230, 0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 13. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 14. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 15. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 16. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 17. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 18. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 19. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 20. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 21. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 22. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   84,  91,  0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 23. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 24. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 25. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   9,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 26. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   9,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 27. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			103, 103, 9,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 28. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			107, 107, 107, 107, 0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 29. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			118, 118, 0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 30. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			122, 122, 122, 122, 0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 31. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			220, 220, 0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   220, 0,   220,
+			0,   216, 0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 32. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   129, 130, 0,   132, 0,   0,   0,
+			0,   0,   130, 130, 130, 130, 0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 33. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			130, 0,   230, 230, 9,   0,   230, 230,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 34. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   220, 0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 35. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   7,
+			0,   9,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 36. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   230,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 37. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   9,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   9,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 38. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   9,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   230, 0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 39. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   228, 0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 40. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   222, 230, 220, 0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 41. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   230,
+			220, 0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 42. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 43. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   9,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   230, 220, 230, 230, 230,
+			230, 230, 230, 230, 0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 44. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 230, 220, 230, 230, 230, 230, 230,
+			230, 230, 220, 0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   230, 220,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 45. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 230, 1,   1,   230, 230, 230, 230,
+			1,   1,   1,   230, 230, 0,   0,   0,
+			0,   230, 0,   0,   0,   1,   1,   230,
+			220, 230, 1,   1,   220, 220, 220, 220,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 46. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   218, 228, 232, 222, 224, 224,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 47. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   8,   8,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 48. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   9,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 49. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   26,  0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 50. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 230, 230, 230, 0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 51. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   220, 0,   230,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			230, 1,   220, 0,   0,   0,   0,   9,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 52. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   216, 216, 1,
+			1,   1,   0,   0,   0,   226, 216, 216,
+			216, 216, 216, 0,   0,   0,   0,   0,
+			0,   0,   0,   220, 220, 220, 220, 220,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 53. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			220, 220, 220, 0,   0,   230, 230, 230,
+			230, 230, 220, 220, 0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   230, 230, 230, 230, 0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+		{	/* Fourth byte table 54. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   230, 230, 230, 0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+		},
+	},
+};
+
+static const uchar_t u8_composition_b1_tbl[2][256] = {
+	{
+		0,  N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+	},
+	{
+		0,  N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+		N_, N_, N_, N_, N_, N_, N_, N_,
+	},
+};
+
+static const uchar_t u8_composition_b2_tbl[2][1][256] = {
+	{
+		{
+			0,  N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			1,  2,  3,  4,  N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+
+	},
+	{
+		{
+			0,  N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			1,  2,  3,  4,  N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+
+	},
+
+};
+
+static const u8_displacement_t u8_composition_b3_tbl[2][5][256] = {
+	{
+		{	/* Third byte table 0. */
+			{ 0x8000, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 0, 2470 },
+			{ 0x8001, 2491 }, { 1, 2871 }, { 2, 2959 },
+			{ 3, 3061 }, { 4, 3212 }, { 5, 3226 },
+			{ N_, 0 }, { 6, 3270 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 0x8002, 3277 },
+			{ 7, 3774 }, { 8, 3949 }, { 9, 4198 },
+			{ N_, 0 }, { 10, 4265 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ 11, 4293 }, { 12, 4312 }, { N_, 0 },
+			{ 13, 4326 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+		{	/* Third byte table 1. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 14, 4347 },
+			{ N_, 0 }, { N_, 0 }, { 15, 4374 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 16, 4391 },
+			{ 17, 4416 }, { 18, 4425 }, { N_, 0 },
+			{ 19, 4451 }, { 20, 4460 }, { 21, 4469 },
+			{ N_, 0 }, { 22, 4503 }, { N_, 0 },
+			{ 23, 4529 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
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+		},
+		{	/* Third byte table 2. */
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+			{ N_, 0 }, { N_, 0 }, { 24, 4563 },
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+		{	/* Third byte table 3. */
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+		},
+	},
+	{
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+		{	/* Third byte table 1. */
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+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 14, 4347 },
+			{ N_, 0 }, { N_, 0 }, { 15, 4374 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 16, 4391 },
+			{ 17, 4416 }, { 18, 4425 }, { N_, 0 },
+			{ 19, 4451 }, { 20, 4460 }, { 21, 4469 },
+			{ N_, 0 }, { 22, 4503 }, { N_, 0 },
+			{ 23, 4529 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+		{	/* Third byte table 2. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 24, 4563 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { 25, 4572 }, { 26, 4662 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { 27, 4671 }, { 28, 4687 },
+			{ 29, 4719 }, { 30, 4765 }, { 0x8003, 4781 },
+			{ 0x8004, 5353 }, { 31, 5715 }, { 32, 5745 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+		{	/* Third byte table 3. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 33, 5783 },
+			{ 34, 5807 }, { 35, 5831 }, { 36, 5879 },
+			{ 37, 5999 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+		{	/* Third byte table 4. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ 38, 6111 }, { 39, 6340 }, { 40, 6457 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+	},
+};
+
+static const uchar_t u8_composition_b4_tbl[2][41][257] = {
+	{
+		{	/* Fourth byte table 0. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 1. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   29,  58,  58,  58,  58,
+			58,  58,  58,  58,  58,  58,  58,  58,
+			58,  58,  58,  73,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,
+		},
+		{	/* Fourth byte table 2. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   15,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  38,  46,  46,  46,  46,
+			46,  54,  62,  62,  62,  62,  62,  62,
+			62,  70,  78,  86,  94,  94,  94,  94,
+			94,  94,  94,  94,  94,  94,  94,  94,
+			94,  94,  94,  94,  94,  94,  94,  94,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102,
+		},
+		{	/* Fourth byte table 3. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   36,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			108, 144, 144, 144, 144, 144, 144, 144,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151,
+		},
+		{	/* Fourth byte table 4. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   7,   14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,
+		},
+		{	/* Fourth byte table 5. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   7,
+			14,  22,  30,  30,  30,  30,  30,  37,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,
+		},
+		{	/* Fourth byte table 6. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,
+		},
+		{	/* Fourth byte table 7. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   15,  15,  15,  15,  70,  70,
+			70,  70,  112, 133, 154, 154, 154, 162,
+			162, 162, 162, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175,
+		},
+		{	/* Fourth byte table 8. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   20,  20,  20,  27,  27,  46,  59,
+			66,  91,  91,  98,  98,  98,  98,  105,
+			105, 105, 105, 105, 130, 130, 130, 130,
+			137, 137, 137, 137, 144, 144, 151, 151,
+			151, 164, 164, 164, 171, 171, 190, 203,
+			210, 235, 235, 242, 242, 242, 242, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249,
+		},
+		{	/* Fourth byte table 9. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   25,  25,  25,  25,
+			32,  32,  32,  32,  39,  39,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  53,
+			53,  53,  53,  53,  53,  53,  53,  53,
+			53,  53,  53,  53,  53,  53,  53,  53,
+			53,  53,  53,  53,  53,  53,  53,  53,
+			53,  53,  53,  53,  53,  60,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,
+		},
+		{	/* Fourth byte table 10. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  21,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,
+		},
+		{	/* Fourth byte table 11. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,
+		},
+		{	/* Fourth byte table 12. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   7,   14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,
+		},
+		{	/* Fourth byte table 13. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   14,  14,  14,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 14. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   9,   9,   9,   9,   9,   9,   9,
+			9,   18,  18,  18,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,
+		},
+		{	/* Fourth byte table 15. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,
+		},
+		{	/* Fourth byte table 16. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,
+		},
+		{	/* Fourth byte table 17. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,
+		},
+		{	/* Fourth byte table 18. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   17,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,
+		},
+		{	/* Fourth byte table 19. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,
+		},
+		{	/* Fourth byte table 20. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,
+		},
+		{	/* Fourth byte table 21. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   25,
+			25,  25,  25,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,
+		},
+		{	/* Fourth byte table 22. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   17,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,
+		},
+		{	/* Fourth byte table 23. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   25,  25,  25,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,
+		},
+		{	/* Fourth byte table 24. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,
+		},
+		{	/* Fourth byte table 25. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   8,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,
+		},
+		{	/* Fourth byte table 26. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   8,   16,  16,  16,  16,
+			16,  16,  16,  24,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,
+		},
+		{	/* Fourth byte table 27. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   15,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  38,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,
+		},
+		{	/* Fourth byte table 28. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   8,   16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,
+		},
+		{	/* Fourth byte table 29. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,
+		},
+		{	/* Fourth byte table 30. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   16,
+			16,  16,  16,  16,  16,  16,  16,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,
+		},
+		{	/* Fourth byte table 31. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   8,   8,   16,  16,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,
+		},
+		{	/* Fourth byte table 32. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   8,   8,   16,  16,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,
+		},
+		{	/* Fourth byte table 33. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   8,   8,   8,   8,
+			8,   16,  16,  16,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  32,  32,  40,  40,
+			40,  40,  40,  40,  40,  40,  40,  40,
+			40,  40,  40,  40,  40,  40,  40,  40,
+			40,  40,  40,  40,  40,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,
+		},
+		{	/* Fourth byte table 34. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   8,   8,   16,  16,
+			16,  24,  24,  24,  24,  24,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  40,  40,  40,  48,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  64,  72,  72,  72,  80,
+			88,  88,  88,  96,  104, 112, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120,
+		},
+		{	/* Fourth byte table 35. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   8,   16,  16,  16,  24,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  40,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  56,  56,  56,  56,  56,
+			56,  64,  72,  72,  80,  80,  80,  80,
+			80,  80,  80,  88,  96,  104, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112,
+		},
+		{	/* Fourth byte table 36. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   9,
+			9,   9,   9,   9,   18,  18,  27,  27,
+			36,  36,  45,  45,  54,  54,  63,  63,
+			72,  72,  81,  81,  90,  90,  99,  99,
+			108, 108, 117, 117, 117, 126, 126, 135,
+			135, 144, 144, 144, 144, 144, 144, 144,
+			161, 161, 161, 178, 178, 178, 195, 195,
+			195, 212, 212, 212, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229,
+		},
+		{	/* Fourth byte table 37. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   18,
+			18,  18,  18,  18,  27,  27,  36,  36,
+			45,  45,  54,  54,  63,  63,  72,  72,
+			81,  81,  90,  90,  99,  99,  108, 108,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117,
+		},
+		{	/* Fourth byte table 38. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   9,   9,   9,   18,  18,  27,
+			27,  36,  36,  36,  36,  36,  36,  36,
+			53,  53,  53,  70,  70,  70,  87,  87,
+			87,  104, 104, 104, 121, 121, 121, 121,
+			121, 121, 121, 121, 121, 121, 121, 121,
+			121, 121, 121, 121, 121, 121, 121, 121,
+			130, 139, 148, 157, 157, 157, 157, 157,
+			157, 157, 157, 157, 157, 157, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166,
+		},
+		{	/* Fourth byte table 39. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 40. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+	},
+	{
+		{	/* Fourth byte table 0. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 1. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   29,  58,  58,  58,  58,
+			58,  58,  58,  58,  58,  58,  58,  58,
+			58,  58,  58,  73,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,
+		},
+		{	/* Fourth byte table 2. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   15,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  38,  46,  46,  46,  46,
+			46,  54,  62,  62,  62,  62,  62,  62,
+			62,  70,  78,  86,  94,  94,  94,  94,
+			94,  94,  94,  94,  94,  94,  94,  94,
+			94,  94,  94,  94,  94,  94,  94,  94,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102, 102, 102, 102, 102, 102, 102, 102,
+			102,
+		},
+		{	/* Fourth byte table 3. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   36,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			108, 144, 144, 144, 144, 144, 144, 144,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151, 151, 151, 151, 151, 151, 151, 151,
+			151,
+		},
+		{	/* Fourth byte table 4. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   7,   14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,
+		},
+		{	/* Fourth byte table 5. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   7,
+			14,  22,  30,  30,  30,  30,  30,  37,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,
+		},
+		{	/* Fourth byte table 6. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,
+		},
+		{	/* Fourth byte table 7. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   15,  15,  15,  15,  70,  70,
+			70,  70,  112, 133, 154, 154, 154, 162,
+			162, 162, 162, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175,
+		},
+		{	/* Fourth byte table 8. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   20,  20,  20,  27,  27,  46,  59,
+			66,  91,  91,  98,  98,  98,  98,  105,
+			105, 105, 105, 105, 130, 130, 130, 130,
+			137, 137, 137, 137, 144, 144, 151, 151,
+			151, 164, 164, 164, 171, 171, 190, 203,
+			210, 235, 235, 242, 242, 242, 242, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249, 249, 249, 249, 249, 249, 249, 249,
+			249,
+		},
+		{	/* Fourth byte table 9. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   25,  25,  25,  25,
+			32,  32,  32,  32,  39,  39,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  53,
+			53,  53,  53,  53,  53,  53,  53,  53,
+			53,  53,  53,  53,  53,  53,  53,  53,
+			53,  53,  53,  53,  53,  53,  53,  53,
+			53,  53,  53,  53,  53,  60,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,
+		},
+		{	/* Fourth byte table 10. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  21,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,
+		},
+		{	/* Fourth byte table 11. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,
+		},
+		{	/* Fourth byte table 12. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   7,   14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,
+		},
+		{	/* Fourth byte table 13. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   14,  14,  14,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 14. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   9,   9,   9,   9,   9,   9,   9,
+			9,   18,  18,  18,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,
+		},
+		{	/* Fourth byte table 15. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,
+		},
+		{	/* Fourth byte table 16. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,
+		},
+		{	/* Fourth byte table 17. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,
+		},
+		{	/* Fourth byte table 18. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   17,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,
+		},
+		{	/* Fourth byte table 19. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,
+		},
+		{	/* Fourth byte table 20. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,
+		},
+		{	/* Fourth byte table 21. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   25,
+			25,  25,  25,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,
+		},
+		{	/* Fourth byte table 22. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   17,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,
+		},
+		{	/* Fourth byte table 23. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   25,  25,  25,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  34,  34,
+			34,
+		},
+		{	/* Fourth byte table 24. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,
+		},
+		{	/* Fourth byte table 25. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   9,   9,
+			18,  18,  27,  27,  36,  36,  45,  45,
+			45,  45,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  63,  63,  72,  72,  81,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,
+		},
+		{	/* Fourth byte table 26. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,
+		},
+		{	/* Fourth byte table 27. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   8,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,
+		},
+		{	/* Fourth byte table 28. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   8,   16,  16,  16,  16,
+			16,  16,  16,  24,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,
+		},
+		{	/* Fourth byte table 29. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   15,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  38,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,
+		},
+		{	/* Fourth byte table 30. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   8,   16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,
+		},
+		{	/* Fourth byte table 31. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,
+		},
+		{	/* Fourth byte table 32. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   16,
+			16,  16,  16,  16,  16,  16,  16,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,
+		},
+		{	/* Fourth byte table 33. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   8,   8,   16,  16,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,
+		},
+		{	/* Fourth byte table 34. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   8,   8,   16,  16,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,
+		},
+		{	/* Fourth byte table 35. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   8,   8,   8,   8,
+			8,   16,  16,  16,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  32,  32,  40,  40,
+			40,  40,  40,  40,  40,  40,  40,  40,
+			40,  40,  40,  40,  40,  40,  40,  40,
+			40,  40,  40,  40,  40,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,
+		},
+		{	/* Fourth byte table 36. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   8,   8,   16,  16,
+			16,  24,  24,  24,  24,  24,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  40,  40,  40,  48,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  64,  72,  72,  72,  80,
+			88,  88,  88,  96,  104, 112, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120, 120, 120, 120, 120, 120, 120, 120,
+			120,
+		},
+		{	/* Fourth byte table 37. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   8,   16,  16,  16,  24,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  40,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  56,  56,  56,  56,  56,
+			56,  64,  72,  72,  80,  80,  80,  80,
+			80,  80,  80,  88,  96,  104, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112,
+		},
+		{	/* Fourth byte table 38. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   9,
+			9,   9,   9,   9,   18,  18,  27,  27,
+			36,  36,  45,  45,  54,  54,  63,  63,
+			72,  72,  81,  81,  90,  90,  99,  99,
+			108, 108, 117, 117, 117, 126, 126, 135,
+			135, 144, 144, 144, 144, 144, 144, 144,
+			161, 161, 161, 178, 178, 178, 195, 195,
+			195, 212, 212, 212, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229, 229, 229, 229, 229, 229, 229, 229,
+			229,
+		},
+		{	/* Fourth byte table 39. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   18,
+			18,  18,  18,  18,  27,  27,  36,  36,
+			45,  45,  54,  54,  63,  63,  72,  72,
+			81,  81,  90,  90,  99,  99,  108, 108,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117, 117, 117, 117, 117, 117, 117, 117,
+			117,
+		},
+		{	/* Fourth byte table 40. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   9,   9,   9,   18,  18,  27,
+			27,  36,  36,  36,  36,  36,  36,  36,
+			53,  53,  53,  70,  70,  70,  87,  87,
+			87,  104, 104, 104, 121, 121, 121, 121,
+			121, 121, 121, 121, 121, 121, 121, 121,
+			121, 121, 121, 121, 121, 121, 121, 121,
+			130, 139, 148, 157, 157, 157, 157, 157,
+			157, 157, 157, 157, 157, 157, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166, 166, 166, 166, 166, 166, 166, 166,
+			166,
+		},
+	},
+};
+
+static const uint16_t u8_composition_b4_16bit_tbl[2][5][257] = {
+	{
+		{	/* Fourth byte 16-bit table 0. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    8,    16,   24,
+			24,   24,   124,  146,  177,  219,  327,  335,
+			379,  427,  521,  528,  562,  602,  624,  683,
+			782,  797,  797,  849,  894,  941,  1061, 1076,
+			1118, 1133, 1193, 1233, 1233, 1233, 1233, 1233,
+			1233, 1233, 1333, 1355, 1386, 1428, 1536, 1544,
+			1588, 1643, 1731, 1744, 1778, 1818, 1840, 1899,
+			1998, 2013, 2013, 2065, 2110, 2164, 2284, 2299,
+			2348, 2363, 2430, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470,
+		},
+		{	/* Fourth byte 16-bit table 1. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    29,   29,   36,   43,   56,
+			64,   64,   64,   93,   93,   93,   93,   93,
+			101,  101,  101,  101,  101,  130,  151,  158,
+			158,  165,  165,  165,  165,  190,  190,  190,
+			190,  190,  190,  219,  219,  226,  233,  246,
+			254,  254,  254,  283,  283,  283,  283,  283,
+			291,  291,  291,  291,  291,  320,  341,  348,
+			348,  355,  355,  355,  355,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,
+		},
+		{	/* Fourth byte 16-bit table 2. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    49,   49,   49,   49,   77,   77,
+			112,  112,  160,  160,  160,  160,  160,  160,
+			188,  188,  196,  196,  196,  196,  237,  237,
+			237,  237,  272,  272,  272,  280,  280,  288,
+			288,  288,  344,  344,  344,  344,  372,  372,
+			414,  414,  469,  469,  469,  469,  469,  469,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,
+		},
+		{	/* Fourth byte 16-bit table 3. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    29,   58,   66,   74,   82,   90,   98,
+			106,  135,  164,  172,  180,  188,  196,  204,
+			212,  227,  242,  242,  242,  242,  242,  242,
+			242,  257,  272,  272,  272,  272,  272,  272,
+			272,  301,  330,  338,  346,  354,  362,  370,
+			378,  407,  436,  444,  452,  460,  468,  476,
+			484,  506,  528,  528,  528,  528,  528,  528,
+			528,  550,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,
+		},
+		{	/* Fourth byte 16-bit table 4. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    15,   30,   30,   30,   30,   30,   30,
+			30,   45,   60,   60,   60,   60,   60,   60,
+			60,   82,   104,  104,  104,  104,  104,  104,
+			104,  104,  126,  126,  126,  126,  126,  126,
+			126,  155,  184,  192,  200,  208,  216,  224,
+			232,  261,  290,  298,  306,  314,  322,  330,
+			338,  346,  346,  346,  346,  354,  354,  354,
+			354,  354,  354,  354,  354,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,
+		},
+	},
+	{
+		{	/* Fourth byte 16-bit table 0. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    8,    16,   24,
+			24,   24,   124,  146,  177,  219,  327,  335,
+			379,  427,  521,  528,  562,  602,  624,  683,
+			782,  797,  797,  849,  894,  941,  1061, 1076,
+			1118, 1133, 1193, 1233, 1233, 1233, 1233, 1233,
+			1233, 1233, 1333, 1355, 1386, 1428, 1536, 1544,
+			1588, 1643, 1731, 1744, 1778, 1818, 1840, 1899,
+			1998, 2013, 2013, 2065, 2110, 2164, 2284, 2299,
+			2348, 2363, 2430, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470, 2470, 2470, 2470, 2470, 2470, 2470, 2470,
+			2470,
+		},
+		{	/* Fourth byte 16-bit table 1. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    29,   29,   36,   43,   56,
+			64,   64,   64,   93,   93,   93,   93,   93,
+			101,  101,  101,  101,  101,  130,  151,  158,
+			158,  165,  165,  165,  165,  190,  190,  190,
+			190,  190,  190,  219,  219,  226,  233,  246,
+			254,  254,  254,  283,  283,  283,  283,  283,
+			291,  291,  291,  291,  291,  320,  341,  348,
+			348,  355,  355,  355,  355,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,  380,  380,  380,  380,  380,  380,  380,
+			380,
+		},
+		{	/* Fourth byte 16-bit table 2. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    49,   49,   49,   49,   77,   77,
+			112,  112,  160,  160,  160,  160,  160,  160,
+			188,  188,  196,  196,  196,  196,  237,  237,
+			237,  237,  272,  272,  272,  280,  280,  288,
+			288,  288,  344,  344,  344,  344,  372,  372,
+			414,  414,  469,  469,  469,  469,  469,  469,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,  497,  497,  497,  497,  497,  497,  497,
+			497,
+		},
+		{	/* Fourth byte 16-bit table 3. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    29,   58,   66,   74,   82,   90,   98,
+			106,  135,  164,  172,  180,  188,  196,  204,
+			212,  227,  242,  242,  242,  242,  242,  242,
+			242,  257,  272,  272,  272,  272,  272,  272,
+			272,  301,  330,  338,  346,  354,  362,  370,
+			378,  407,  436,  444,  452,  460,  468,  476,
+			484,  506,  528,  528,  528,  528,  528,  528,
+			528,  550,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,  572,  572,  572,  572,  572,  572,  572,
+			572,
+		},
+		{	/* Fourth byte 16-bit table 4. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    15,   30,   30,   30,   30,   30,   30,
+			30,   45,   60,   60,   60,   60,   60,   60,
+			60,   82,   104,  104,  104,  104,  104,  104,
+			104,  104,  126,  126,  126,  126,  126,  126,
+			126,  155,  184,  192,  200,  208,  216,  224,
+			232,  261,  290,  298,  306,  314,  322,  330,
+			338,  346,  346,  346,  346,  354,  354,  354,
+			354,  354,  354,  354,  354,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,  362,  362,  362,  362,  362,  362,  362,
+			362,
+		},
+	},
+};
+
+static const uchar_t u8_composition_final_tbl[2][6623] = {
+	{
+		0x01, 0xCC, 0xB8, FIL_, 0xE2, 0x89, 0xAE, FIL_,
+		0x01, 0xCC, 0xB8, FIL_, 0xE2, 0x89, 0xA0, FIL_,
+		0x01, 0xCC, 0xB8, FIL_, 0xE2, 0x89, 0xAF, FIL_,
+		0x10, 0xCC, 0x86, FIL_, 0xC4, 0x82, FIL_, 0xCC,
+		0x87, FIL_, 0xC8, 0xA6, FIL_, 0xCC, 0x8F, FIL_,
+		0xC8, 0x80, FIL_, 0xCC, 0x82, FIL_, 0xC3, 0x82,
+		FIL_, 0xCC, 0x81, FIL_, 0xC3, 0x81, FIL_, 0xCC,
+		0x80, FIL_, 0xC3, 0x80, FIL_, 0xCC, 0x83, FIL_,
+		0xC3, 0x83, FIL_, 0xCC, 0xA3, FIL_, 0xE1, 0xBA,
+		0xA0, FIL_, 0xCC, 0xA5, FIL_, 0xE1, 0xB8, 0x80,
+		FIL_, 0xCC, 0x91, FIL_, 0xC8, 0x82, FIL_, 0xCC,
+		0x84, FIL_, 0xC4, 0x80, FIL_, 0xCC, 0x88, FIL_,
+		0xC3, 0x84, FIL_, 0xCC, 0x8A, FIL_, 0xC3, 0x85,
+		FIL_, 0xCC, 0xA8, FIL_, 0xC4, 0x84, FIL_, 0xCC,
+		0x89, FIL_, 0xE1, 0xBA, 0xA2, FIL_, 0xCC, 0x8C,
+		FIL_, 0xC7, 0x8D, FIL_, 0x03, 0xCC, 0x87, FIL_,
+		0xE1, 0xB8, 0x82, FIL_, 0xCC, 0xB1, FIL_, 0xE1,
+		0xB8, 0x86, FIL_, 0xCC, 0xA3, FIL_, 0xE1, 0xB8,
+		0x84, FIL_, 0x05, 0xCC, 0xA7, FIL_, 0xC3, 0x87,
+		FIL_, 0xCC, 0x81, FIL_, 0xC4, 0x86, FIL_, 0xCC,
+		0x8C, FIL_, 0xC4, 0x8C, FIL_, 0xCC, 0x87, FIL_,
+		0xC4, 0x8A, FIL_, 0xCC, 0x82, FIL_, 0xC4, 0x88,
+		FIL_, 0x06, 0xCC, 0xB1, FIL_, 0xE1, 0xB8, 0x8E,
+		FIL_, 0xCC, 0xA7, FIL_, 0xE1, 0xB8, 0x90, FIL_,
+		0xCC, 0xAD, FIL_, 0xE1, 0xB8, 0x92, FIL_, 0xCC,
+		0x87, FIL_, 0xE1, 0xB8, 0x8A, FIL_, 0xCC, 0x8C,
+		FIL_, 0xC4, 0x8E, FIL_, 0xCC, 0xA3, FIL_, 0xE1,
+		0xB8, 0x8C, FIL_, 0x11, 0xCC, 0x80, FIL_, 0xC3,
+		0x88, FIL_, 0xCC, 0x81, FIL_, 0xC3, 0x89, FIL_,
+		0xCC, 0x82, FIL_, 0xC3, 0x8A, FIL_, 0xCC, 0x88,
+		FIL_, 0xC3, 0x8B, FIL_, 0xCC, 0xA7, FIL_, 0xC8,
+		0xA8, FIL_, 0xCC, 0x91, FIL_, 0xC8, 0x86, FIL_,
+		0xCC, 0x8F, FIL_, 0xC8, 0x84, FIL_, 0xCC, 0x89,
+		FIL_, 0xE1, 0xBA, 0xBA, FIL_, 0xCC, 0xB0, FIL_,
+		0xE1, 0xB8, 0x9A, FIL_, 0xCC, 0xAD, FIL_, 0xE1,
+		0xB8, 0x98, FIL_, 0xCC, 0x83, FIL_, 0xE1, 0xBA,
+		0xBC, FIL_, 0xCC, 0xA3, FIL_, 0xE1, 0xBA, 0xB8,
+		FIL_, 0xCC, 0x84, FIL_, 0xC4, 0x92, FIL_, 0xCC,
+		0x86, FIL_, 0xC4, 0x94, FIL_, 0xCC, 0x87, FIL_,
+		0xC4, 0x96, FIL_, 0xCC, 0xA8, FIL_, 0xC4, 0x98,
+		FIL_, 0xCC, 0x8C, FIL_, 0xC4, 0x9A, FIL_, 0x01,
+		0xCC, 0x87, FIL_, 0xE1, 0xB8, 0x9E, FIL_, 0x07,
+		0xCC, 0x8C, FIL_, 0xC7, 0xA6, FIL_, 0xCC, 0x87,
+		FIL_, 0xC4, 0xA0, FIL_, 0xCC, 0x84, FIL_, 0xE1,
+		0xB8, 0xA0, FIL_, 0xCC, 0x82, FIL_, 0xC4, 0x9C,
+		FIL_, 0xCC, 0x81, FIL_, 0xC7, 0xB4, FIL_, 0xCC,
+		0xA7, FIL_, 0xC4, 0xA2, FIL_, 0xCC, 0x86, FIL_,
+		0xC4, 0x9E, FIL_, 0x07, 0xCC, 0xAE, FIL_, 0xE1,
+		0xB8, 0xAA, FIL_, 0xCC, 0x87, FIL_, 0xE1, 0xB8,
+		0xA2, FIL_, 0xCC, 0x88, FIL_, 0xE1, 0xB8, 0xA6,
+		FIL_, 0xCC, 0xA3, FIL_, 0xE1, 0xB8, 0xA4, FIL_,
+		0xCC, 0xA7, FIL_, 0xE1, 0xB8, 0xA8, FIL_, 0xCC,
+		0x8C, FIL_, 0xC8, 0x9E, FIL_, 0xCC, 0x82, FIL_,
+		0xC4, 0xA4, FIL_, 0x0F, 0xCC, 0x84, FIL_, 0xC4,
+		0xAA, FIL_, 0xCC, 0x80, FIL_, 0xC3, 0x8C, FIL_,
+		0xCC, 0xA8, FIL_, 0xC4, 0xAE, FIL_, 0xCC, 0x83,
+		FIL_, 0xC4, 0xA8, FIL_, 0xCC, 0x88, FIL_, 0xC3,
+		0x8F, FIL_, 0xCC, 0x81, FIL_, 0xC3, 0x8D, FIL_,
+		0xCC, 0x8F, FIL_, 0xC8, 0x88, FIL_, 0xCC, 0x86,
+		FIL_, 0xC4, 0xAC, FIL_, 0xCC, 0x91, FIL_, 0xC8,
+		0x8A, FIL_, 0xCC, 0x8C, FIL_, 0xC7, 0x8F, FIL_,
+		0xCC, 0x89, FIL_, 0xE1, 0xBB, 0x88, FIL_, 0xCC,
+		0x87, FIL_, 0xC4, 0xB0, FIL_, 0xCC, 0xA3, FIL_,
+		0xE1, 0xBB, 0x8A, FIL_, 0xCC, 0xB0, FIL_, 0xE1,
+		0xB8, 0xAC, FIL_, 0xCC, 0x82, FIL_, 0xC3, 0x8E,
+		FIL_, 0x01, 0xCC, 0x82, FIL_, 0xC4, 0xB4, FIL_,
+		0x05, 0xCC, 0x8C, FIL_, 0xC7, 0xA8, FIL_, 0xCC,
+		0xB1, FIL_, 0xE1, 0xB8, 0xB4, FIL_, 0xCC, 0x81,
+		FIL_, 0xE1, 0xB8, 0xB0, FIL_, 0xCC, 0xA7, FIL_,
+		0xC4, 0xB6, FIL_, 0xCC, 0xA3, FIL_, 0xE1, 0xB8,
+		0xB2, FIL_, 0x06, 0xCC, 0xA7, FIL_, 0xC4, 0xBB,
+		FIL_, 0xCC, 0x8C, FIL_, 0xC4, 0xBD, FIL_, 0xCC,
+		0xB1, FIL_, 0xE1, 0xB8, 0xBA, FIL_, 0xCC, 0xA3,
+		FIL_, 0xE1, 0xB8, 0xB6, FIL_, 0xCC, 0xAD, FIL_,
+		0xE1, 0xB8, 0xBC, FIL_, 0xCC, 0x81, FIL_, 0xC4,
+		0xB9, FIL_, 0x03, 0xCC, 0x81, FIL_, 0xE1, 0xB8,
+		0xBE, FIL_, 0xCC, 0xA3, FIL_, 0xE1, 0xB9, 0x82,
+		FIL_, 0xCC, 0x87, FIL_, 0xE1, 0xB9, 0x80, FIL_,
+		0x09, 0xCC, 0x80, FIL_, 0xC7, 0xB8, FIL_, 0xCC,
+		0xAD, FIL_, 0xE1, 0xB9, 0x8A, FIL_, 0xCC, 0x87,
+		FIL_, 0xE1, 0xB9, 0x84, FIL_, 0xCC, 0xB1, FIL_,
+		0xE1, 0xB9, 0x88, FIL_, 0xCC, 0x83, FIL_, 0xC3,
+		0x91, FIL_, 0xCC, 0xA3, FIL_, 0xE1, 0xB9, 0x86,
+		FIL_, 0xCC, 0x81, FIL_, 0xC5, 0x83, FIL_, 0xCC,
+		0xA7, FIL_, 0xC5, 0x85, FIL_, 0xCC, 0x8C, FIL_,
+		0xC5, 0x87, FIL_, 0x10, 0xCC, 0xA8, FIL_, 0xC7,
+		0xAA, FIL_, 0xCC, 0x91, FIL_, 0xC8, 0x8E, FIL_,
+		0xCC, 0x80, FIL_, 0xC3, 0x92, FIL_, 0xCC, 0x9B,
+		FIL_, 0xC6, 0xA0, FIL_, 0xCC, 0x8F, FIL_, 0xC8,
+		0x8C, FIL_, 0xCC, 0x81, FIL_, 0xC3, 0x93, FIL_,
+		0xCC, 0x87, FIL_, 0xC8, 0xAE, FIL_, 0xCC, 0x8C,
+		FIL_, 0xC7, 0x91, FIL_, 0xCC, 0xA3, FIL_, 0xE1,
+		0xBB, 0x8C, FIL_, 0xCC, 0x82, FIL_, 0xC3, 0x94,
+		FIL_, 0xCC, 0x84, FIL_, 0xC5, 0x8C, FIL_, 0xCC,
+		0x83, FIL_, 0xC3, 0x95, FIL_, 0xCC, 0x86, FIL_,
+		0xC5, 0x8E, FIL_, 0xCC, 0x88, FIL_, 0xC3, 0x96,
+		FIL_, 0xCC, 0x8B, FIL_, 0xC5, 0x90, FIL_, 0xCC,
+		0x89, FIL_, 0xE1, 0xBB, 0x8E, FIL_, 0x02, 0xCC,
+		0x87, FIL_, 0xE1, 0xB9, 0x96, FIL_, 0xCC, 0x81,
+		FIL_, 0xE1, 0xB9, 0x94, FIL_, 0x08, 0xCC, 0x91,
+		FIL_, 0xC8, 0x92, FIL_, 0xCC, 0xA7, FIL_, 0xC5,
+		0x96, FIL_, 0xCC, 0x8C, FIL_, 0xC5, 0x98, FIL_,
+		0xCC, 0xB1, FIL_, 0xE1, 0xB9, 0x9E, FIL_, 0xCC,
+		0xA3, FIL_, 0xE1, 0xB9, 0x9A, FIL_, 0xCC, 0x87,
+		FIL_, 0xE1, 0xB9, 0x98, FIL_, 0xCC, 0x81, FIL_,
+		0xC5, 0x94, FIL_, 0xCC, 0x8F, FIL_, 0xC8, 0x90,
+		FIL_, 0x07, 0xCC, 0x81, FIL_, 0xC5, 0x9A, FIL_,
+		0xCC, 0x82, FIL_, 0xC5, 0x9C, FIL_, 0xCC, 0xA7,
+		FIL_, 0xC5, 0x9E, FIL_, 0xCC, 0x8C, FIL_, 0xC5,
+		0xA0, FIL_, 0xCC, 0xA6, FIL_, 0xC8, 0x98, FIL_,
+		0xCC, 0x87, FIL_, 0xE1, 0xB9, 0xA0, FIL_, 0xCC,
+		0xA3, FIL_, 0xE1, 0xB9, 0xA2, FIL_, 0x07, 0xCC,
+		0x8C, FIL_, 0xC5, 0xA4, FIL_, 0xCC, 0xB1, FIL_,
+		0xE1, 0xB9, 0xAE, FIL_, 0xCC, 0xA6, FIL_, 0xC8,
+		0x9A, FIL_, 0xCC, 0xA7, FIL_, 0xC5, 0xA2, FIL_,
+		0xCC, 0x87, FIL_, 0xE1, 0xB9, 0xAA, FIL_, 0xCC,
+		0xAD, FIL_, 0xE1, 0xB9, 0xB0, FIL_, 0xCC, 0xA3,
+		FIL_, 0xE1, 0xB9, 0xAC, FIL_, 0x13, 0xCC, 0xA8,
+		FIL_, 0xC5, 0xB2, FIL_, 0xCC, 0x83, FIL_, 0xC5,
+		0xA8, FIL_, 0xCC, 0x84, FIL_, 0xC5, 0xAA, FIL_,
+		0xCC, 0x81, FIL_, 0xC3, 0x9A, FIL_, 0xCC, 0x86,
+		FIL_, 0xC5, 0xAC, FIL_, 0xCC, 0x8A, FIL_, 0xC5,
+		0xAE, FIL_, 0xCC, 0x80, FIL_, 0xC3, 0x99, FIL_,
+		0xCC, 0x91, FIL_, 0xC8, 0x96, FIL_, 0xCC, 0x8B,
+		FIL_, 0xC5, 0xB0, FIL_, 0xCC, 0xA4, FIL_, 0xE1,
+		0xB9, 0xB2, FIL_, 0xCC, 0xB0, FIL_, 0xE1, 0xB9,
+		0xB4, FIL_, 0xCC, 0x8F, FIL_, 0xC8, 0x94, FIL_,
+		0xCC, 0xAD, FIL_, 0xE1, 0xB9, 0xB6, FIL_, 0xCC,
+		0x9B, FIL_, 0xC6, 0xAF, FIL_, 0xCC, 0x82, FIL_,
+		0xC3, 0x9B, FIL_, 0xCC, 0x88, FIL_, 0xC3, 0x9C,
+		FIL_, 0xCC, 0x8C, FIL_, 0xC7, 0x93, FIL_, 0xCC,
+		0xA3, FIL_, 0xE1, 0xBB, 0xA4, FIL_, 0xCC, 0x89,
+		FIL_, 0xE1, 0xBB, 0xA6, FIL_, 0x02, 0xCC, 0x83,
+		FIL_, 0xE1, 0xB9, 0xBC, FIL_, 0xCC, 0xA3, FIL_,
+		0xE1, 0xB9, 0xBE, FIL_, 0x06, 0xCC, 0x82, FIL_,
+		0xC5, 0xB4, FIL_, 0xCC, 0x88, FIL_, 0xE1, 0xBA,
+		0x84, FIL_, 0xCC, 0x87, FIL_, 0xE1, 0xBA, 0x86,
+		FIL_, 0xCC, 0xA3, FIL_, 0xE1, 0xBA, 0x88, FIL_,
+		0xCC, 0x81, FIL_, 0xE1, 0xBA, 0x82, FIL_, 0xCC,
+		0x80, FIL_, 0xE1, 0xBA, 0x80, FIL_, 0x02, 0xCC,
+		0x87, FIL_, 0xE1, 0xBA, 0x8A, FIL_, 0xCC, 0x88,
+		FIL_, 0xE1, 0xBA, 0x8C, FIL_, 0x09, 0xCC, 0x89,
+		FIL_, 0xE1, 0xBB, 0xB6, FIL_, 0xCC, 0x87, FIL_,
+		0xE1, 0xBA, 0x8E, FIL_, 0xCC, 0xA3, FIL_, 0xE1,
+		0xBB, 0xB4, FIL_, 0xCC, 0x81, FIL_, 0xC3, 0x9D,
+		FIL_, 0xCC, 0x84, FIL_, 0xC8, 0xB2, FIL_, 0xCC,
+		0x82, FIL_, 0xC5, 0xB6, FIL_, 0xCC, 0x88, FIL_,
+		0xC5, 0xB8, FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBB,
+		0xB2, FIL_, 0xCC, 0x83, FIL_, 0xE1, 0xBB, 0xB8,
+		FIL_, 0x06, 0xCC, 0x87, FIL_, 0xC5, 0xBB, FIL_,
+		0xCC, 0xA3, FIL_, 0xE1, 0xBA, 0x92, FIL_, 0xCC,
+		0x8C, FIL_, 0xC5, 0xBD, FIL_, 0xCC, 0xB1, FIL_,
+		0xE1, 0xBA, 0x94, FIL_, 0xCC, 0x82, FIL_, 0xE1,
+		0xBA, 0x90, FIL_, 0xCC, 0x81, FIL_, 0xC5, 0xB9,
+		FIL_, 0x10, 0xCC, 0x8C, FIL_, 0xC7, 0x8E, FIL_,
+		0xCC, 0x8F, FIL_, 0xC8, 0x81, FIL_, 0xCC, 0xA8,
+		FIL_, 0xC4, 0x85, FIL_, 0xCC, 0xA3, FIL_, 0xE1,
+		0xBA, 0xA1, FIL_, 0xCC, 0x86, FIL_, 0xC4, 0x83,
+		FIL_, 0xCC, 0x89, FIL_, 0xE1, 0xBA, 0xA3, FIL_,
+		0xCC, 0x84, FIL_, 0xC4, 0x81, FIL_, 0xCC, 0x91,
+		FIL_, 0xC8, 0x83, FIL_, 0xCC, 0x8A, FIL_, 0xC3,
+		0xA5, FIL_, 0xCC, 0x88, FIL_, 0xC3, 0xA4, FIL_,
+		0xCC, 0x83, FIL_, 0xC3, 0xA3, FIL_, 0xCC, 0x82,
+		FIL_, 0xC3, 0xA2, FIL_, 0xCC, 0x81, FIL_, 0xC3,
+		0xA1, FIL_, 0xCC, 0x80, FIL_, 0xC3, 0xA0, FIL_,
+		0xCC, 0x87, FIL_, 0xC8, 0xA7, FIL_, 0xCC, 0xA5,
+		FIL_, 0xE1, 0xB8, 0x81, FIL_, 0x03, 0xCC, 0xB1,
+		FIL_, 0xE1, 0xB8, 0x87, FIL_, 0xCC, 0xA3, FIL_,
+		0xE1, 0xB8, 0x85, FIL_, 0xCC, 0x87, FIL_, 0xE1,
+		0xB8, 0x83, FIL_, 0x05, 0xCC, 0x87, FIL_, 0xC4,
+		0x8B, FIL_, 0xCC, 0xA7, FIL_, 0xC3, 0xA7, FIL_,
+		0xCC, 0x82, FIL_, 0xC4, 0x89, FIL_, 0xCC, 0x8C,
+		FIL_, 0xC4, 0x8D, FIL_, 0xCC, 0x81, FIL_, 0xC4,
+		0x87, FIL_, 0x06, 0xCC, 0xAD, FIL_, 0xE1, 0xB8,
+		0x93, FIL_, 0xCC, 0x87, FIL_, 0xE1, 0xB8, 0x8B,
+		FIL_, 0xCC, 0xA3, FIL_, 0xE1, 0xB8, 0x8D, FIL_,
+		0xCC, 0xB1, FIL_, 0xE1, 0xB8, 0x8F, FIL_, 0xCC,
+		0xA7, FIL_, 0xE1, 0xB8, 0x91, FIL_, 0xCC, 0x8C,
+		FIL_, 0xC4, 0x8F, FIL_, 0x11, 0xCC, 0xA8, FIL_,
+		0xC4, 0x99, FIL_, 0xCC, 0x8C, FIL_, 0xC4, 0x9B,
+		FIL_, 0xCC, 0x87, FIL_, 0xC4, 0x97, FIL_, 0xCC,
+		0x88, FIL_, 0xC3, 0xAB, FIL_, 0xCC, 0xA3, FIL_,
+		0xE1, 0xBA, 0xB9, FIL_, 0xCC, 0xB0, FIL_, 0xE1,
+		0xB8, 0x9B, FIL_, 0xCC, 0x84, FIL_, 0xC4, 0x93,
+		FIL_, 0xCC, 0xAD, FIL_, 0xE1, 0xB8, 0x99, FIL_,
+		0xCC, 0x83, FIL_, 0xE1, 0xBA, 0xBD, FIL_, 0xCC,
+		0x86, FIL_, 0xC4, 0x95, FIL_, 0xCC, 0xA7, FIL_,
+		0xC8, 0xA9, FIL_, 0xCC, 0x89, FIL_, 0xE1, 0xBA,
+		0xBB, FIL_, 0xCC, 0x8F, FIL_, 0xC8, 0x85, FIL_,
+		0xCC, 0x81, FIL_, 0xC3, 0xA9, FIL_, 0xCC, 0x91,
+		FIL_, 0xC8, 0x87, FIL_, 0xCC, 0x80, FIL_, 0xC3,
+		0xA8, FIL_, 0xCC, 0x82, FIL_, 0xC3, 0xAA, FIL_,
+		0x01, 0xCC, 0x87, FIL_, 0xE1, 0xB8, 0x9F, FIL_,
+		0x07, 0xCC, 0x86, FIL_, 0xC4, 0x9F, FIL_, 0xCC,
+		0xA7, FIL_, 0xC4, 0xA3, FIL_, 0xCC, 0x81, FIL_,
+		0xC7, 0xB5, FIL_, 0xCC, 0x82, FIL_, 0xC4, 0x9D,
+		FIL_, 0xCC, 0x87, FIL_, 0xC4, 0xA1, FIL_, 0xCC,
+		0x8C, FIL_, 0xC7, 0xA7, FIL_, 0xCC, 0x84, FIL_,
+		0xE1, 0xB8, 0xA1, FIL_, 0x08, 0xCC, 0x8C, FIL_,
+		0xC8, 0x9F, FIL_, 0xCC, 0x82, FIL_, 0xC4, 0xA5,
+		FIL_, 0xCC, 0x88, FIL_, 0xE1, 0xB8, 0xA7, FIL_,
+		0xCC, 0x87, FIL_, 0xE1, 0xB8, 0xA3, FIL_, 0xCC,
+		0xB1, FIL_, 0xE1, 0xBA, 0x96, FIL_, 0xCC, 0xA3,
+		FIL_, 0xE1, 0xB8, 0xA5, FIL_, 0xCC, 0xA7, FIL_,
+		0xE1, 0xB8, 0xA9, FIL_, 0xCC, 0xAE, FIL_, 0xE1,
+		0xB8, 0xAB, FIL_, 0x0E, 0xCC, 0x81, FIL_, 0xC3,
+		0xAD, FIL_, 0xCC, 0x80, FIL_, 0xC3, 0xAC, FIL_,
+		0xCC, 0xA3, FIL_, 0xE1, 0xBB, 0x8B, FIL_, 0xCC,
+		0x8C, FIL_, 0xC7, 0x90, FIL_, 0xCC, 0x89, FIL_,
+		0xE1, 0xBB, 0x89, FIL_, 0xCC, 0x91, FIL_, 0xC8,
+		0x8B, FIL_, 0xCC, 0x8F, FIL_, 0xC8, 0x89, FIL_,
+		0xCC, 0x82, FIL_, 0xC3, 0xAE, FIL_, 0xCC, 0xB0,
+		FIL_, 0xE1, 0xB8, 0xAD, FIL_, 0xCC, 0xA8, FIL_,
+		0xC4, 0xAF, FIL_, 0xCC, 0x86, FIL_, 0xC4, 0xAD,
+		FIL_, 0xCC, 0x84, FIL_, 0xC4, 0xAB, FIL_, 0xCC,
+		0x83, FIL_, 0xC4, 0xA9, FIL_, 0xCC, 0x88, FIL_,
+		0xC3, 0xAF, FIL_, 0x02, 0xCC, 0x82, FIL_, 0xC4,
+		0xB5, FIL_, 0xCC, 0x8C, FIL_, 0xC7, 0xB0, FIL_,
+		0x05, 0xCC, 0xA3, FIL_, 0xE1, 0xB8, 0xB3, FIL_,
+		0xCC, 0x81, FIL_, 0xE1, 0xB8, 0xB1, FIL_, 0xCC,
+		0xA7, FIL_, 0xC4, 0xB7, FIL_, 0xCC, 0x8C, FIL_,
+		0xC7, 0xA9, FIL_, 0xCC, 0xB1, FIL_, 0xE1, 0xB8,
+		0xB5, FIL_, 0x06, 0xCC, 0xA3, FIL_, 0xE1, 0xB8,
+		0xB7, FIL_, 0xCC, 0x81, FIL_, 0xC4, 0xBA, FIL_,
+		0xCC, 0xA7, FIL_, 0xC4, 0xBC, FIL_, 0xCC, 0x8C,
+		FIL_, 0xC4, 0xBE, FIL_, 0xCC, 0xB1, FIL_, 0xE1,
+		0xB8, 0xBB, FIL_, 0xCC, 0xAD, FIL_, 0xE1, 0xB8,
+		0xBD, FIL_, 0x03, 0xCC, 0xA3, FIL_, 0xE1, 0xB9,
+		0x83, FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xB8, 0xBF,
+		FIL_, 0xCC, 0x87, FIL_, 0xE1, 0xB9, 0x81, FIL_,
+		0x09, 0xCC, 0xA3, FIL_, 0xE1, 0xB9, 0x87, FIL_,
+		0xCC, 0x83, FIL_, 0xC3, 0xB1, FIL_, 0xCC, 0x87,
+		FIL_, 0xE1, 0xB9, 0x85, FIL_, 0xCC, 0xB1, FIL_,
+		0xE1, 0xB9, 0x89, FIL_, 0xCC, 0x81, FIL_, 0xC5,
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+		0xBF, 0xB3, FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBD,
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+		FIL_, 0xCC, 0x93, FIL_, 0xE1, 0xBD, 0xA0, FIL_,
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+		0x82, FIL_, 0xE1, 0xBF, 0x97, FIL_, 0xCC, 0x80,
+		FIL_, 0xE1, 0xBF, 0x92, FIL_, 0xCC, 0x81, FIL_,
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+		0xBF, 0xA2, FIL_, 0xCC, 0x81, FIL_, 0xCE, 0xB0,
+		FIL_, 0xCD, 0x82, FIL_, 0xE1, 0xBF, 0xA7, FIL_,
+		0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBF, 0xB4, FIL_,
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+		0x81, FIL_, 0xCF, 0x93, FIL_, 0x01, 0xCC, 0x88,
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+		0x03, 0xCC, 0x86, FIL_, 0xD3, 0x96, FIL_, 0xCC,
+		0x80, FIL_, 0xD0, 0x80, FIL_, 0xCC, 0x88, FIL_,
+		0xD0, 0x81, FIL_, 0x02, 0xCC, 0x88, FIL_, 0xD3,
+		0x9C, FIL_, 0xCC, 0x86, FIL_, 0xD3, 0x81, FIL_,
+		0x01, 0xCC, 0x88, FIL_, 0xD3, 0x9E, FIL_, 0x04,
+		0xCC, 0x80, FIL_, 0xD0, 0x8D, FIL_, 0xCC, 0x88,
+		FIL_, 0xD3, 0xA4, FIL_, 0xCC, 0x86, FIL_, 0xD0,
+		0x99, FIL_, 0xCC, 0x84, FIL_, 0xD3, 0xA2, FIL_,
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+		0xD3, 0xB2, FIL_, 0xCC, 0x88, FIL_, 0xD3, 0xB0,
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+		0x01, 0xCC, 0x88, FIL_, 0xD3, 0x9B, FIL_, 0x01,
+		0xCC, 0x88, FIL_, 0xD3, 0xAA, FIL_, 0x01, 0xCC,
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+		0xE0, 0xAD, 0x96, FIL_, 0xE0, 0xAD, 0x88, FIL_,
+		0x01, 0xE0, 0xAF, 0x97, FIL_, 0xE0, 0xAE, 0x94,
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+		0xE0, 0xB1, 0x88, FIL_, 0x01, 0xE0, 0xB3, 0x95,
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+		0x01, 0xE0, 0xB4, 0xBE, FIL_, 0xE0, 0xB5, 0x8B,
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+		0x9C, FIL_, 0xE0, 0xB7, 0x8A, FIL_, 0xE0, 0xB7,
+		0x9A, FIL_, 0xE0, 0xB7, 0x9F, FIL_, 0xE0, 0xB7,
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+		FIL_, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x99, FIL_,
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+		FIL_, 0xE1, 0xBF, 0x9F, FIL_, 0xCC, 0x81, FIL_,
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+		0xE1, 0xBB, 0xAA, FIL_, 0xCC, 0x89, FIL_, 0xE1,
+		0xBB, 0xAC, FIL_, 0xCC, 0x83, FIL_, 0xE1, 0xBB,
+		0xAE, FIL_, 0xCC, 0xA3, FIL_, 0xE1, 0xBB, 0xB0,
+		FIL_, 0x05, 0xCC, 0x80, FIL_, 0xE1, 0xBB, 0xAB,
+		FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBB, 0xA9, FIL_,
+		0xCC, 0x83, FIL_, 0xE1, 0xBB, 0xAF, FIL_, 0xCC,
+		0xA3, FIL_, 0xE1, 0xBB, 0xB1, FIL_, 0xCC, 0x89,
+		FIL_, 0xE1, 0xBB, 0xAD, FIL_, 0x01, 0xCC, 0x8C,
+		FIL_, 0xC7, 0xAE, FIL_, 0x01, 0xCC, 0x84, FIL_,
+		0xC7, 0xAC, FIL_, 0x01, 0xCC, 0x84, FIL_, 0xC7,
+		0xAD, FIL_, 0x01, 0xCC, 0x84, FIL_, 0xC7, 0xA0,
+		FIL_, 0x01, 0xCC, 0x84, FIL_, 0xC7, 0xA1, FIL_,
+		0x01, 0xCC, 0x86, FIL_, 0xE1, 0xB8, 0x9C, FIL_,
+		0x01, 0xCC, 0x86, FIL_, 0xE1, 0xB8, 0x9D, FIL_,
+		0x01, 0xCC, 0x84, FIL_, 0xC8, 0xB0, FIL_, 0x01,
+		0xCC, 0x84, FIL_, 0xC8, 0xB1, FIL_, 0x01, 0xCC,
+		0x8C, FIL_, 0xC7, 0xAF, FIL_, 0x07, 0xCC, 0x93,
+		FIL_, 0xE1, 0xBC, 0x88, FIL_, 0xCC, 0x81, FIL_,
+		0xCE, 0x86, FIL_, 0xCC, 0x86, FIL_, 0xE1, 0xBE,
+		0xB8, FIL_, 0xCC, 0x84, FIL_, 0xE1, 0xBE, 0xB9,
+		FIL_, 0xCC, 0x94, FIL_, 0xE1, 0xBC, 0x89, FIL_,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0xBC, FIL_, 0xCC,
+		0x80, FIL_, 0xE1, 0xBE, 0xBA, FIL_, 0x04, 0xCC,
+		0x94, FIL_, 0xE1, 0xBC, 0x99, FIL_, 0xCC, 0x80,
+		FIL_, 0xE1, 0xBF, 0x88, FIL_, 0xCC, 0x81, FIL_,
+		0xCE, 0x88, FIL_, 0xCC, 0x93, FIL_, 0xE1, 0xBC,
+		0x98, FIL_, 0x05, 0xCD, 0x85, FIL_, 0xE1, 0xBF,
+		0x8C, FIL_, 0xCC, 0x81, FIL_, 0xCE, 0x89, FIL_,
+		0xCC, 0x80, FIL_, 0xE1, 0xBF, 0x8A, FIL_, 0xCC,
+		0x93, FIL_, 0xE1, 0xBC, 0xA8, FIL_, 0xCC, 0x94,
+		FIL_, 0xE1, 0xBC, 0xA9, FIL_, 0x07, 0xCC, 0x80,
+		FIL_, 0xE1, 0xBF, 0x9A, FIL_, 0xCC, 0x84, FIL_,
+		0xE1, 0xBF, 0x99, FIL_, 0xCC, 0x93, FIL_, 0xE1,
+		0xBC, 0xB8, FIL_, 0xCC, 0x94, FIL_, 0xE1, 0xBC,
+		0xB9, FIL_, 0xCC, 0x86, FIL_, 0xE1, 0xBF, 0x98,
+		FIL_, 0xCC, 0x81, FIL_, 0xCE, 0x8A, FIL_, 0xCC,
+		0x88, FIL_, 0xCE, 0xAA, FIL_, 0x04, 0xCC, 0x81,
+		FIL_, 0xCE, 0x8C, FIL_, 0xCC, 0x94, FIL_, 0xE1,
+		0xBD, 0x89, FIL_, 0xCC, 0x93, FIL_, 0xE1, 0xBD,
+		0x88, FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBF, 0xB8,
+		FIL_, 0x01, 0xCC, 0x94, FIL_, 0xE1, 0xBF, 0xAC,
+		FIL_, 0x06, 0xCC, 0x94, FIL_, 0xE1, 0xBD, 0x99,
+		FIL_, 0xCC, 0x86, FIL_, 0xE1, 0xBF, 0xA8, FIL_,
+		0xCC, 0x88, FIL_, 0xCE, 0xAB, FIL_, 0xCC, 0x84,
+		FIL_, 0xE1, 0xBF, 0xA9, FIL_, 0xCC, 0x81, FIL_,
+		0xCE, 0x8E, FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBF,
+		0xAA, FIL_, 0x05, 0xCC, 0x93, FIL_, 0xE1, 0xBD,
+		0xA8, FIL_, 0xCD, 0x85, FIL_, 0xE1, 0xBF, 0xBC,
+		FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBF, 0xBA, FIL_,
+		0xCC, 0x94, FIL_, 0xE1, 0xBD, 0xA9, FIL_, 0xCC,
+		0x81, FIL_, 0xCE, 0x8F, FIL_, 0x01, 0xCD, 0x85,
+		FIL_, 0xE1, 0xBE, 0xB4, FIL_, 0x01, 0xCD, 0x85,
+		FIL_, 0xE1, 0xBF, 0x84, FIL_, 0x08, 0xCD, 0x85,
+		FIL_, 0xE1, 0xBE, 0xB3, FIL_, 0xCC, 0x84, FIL_,
+		0xE1, 0xBE, 0xB1, FIL_, 0xCC, 0x86, FIL_, 0xE1,
+		0xBE, 0xB0, FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBD,
+		0xB0, FIL_, 0xCC, 0x81, FIL_, 0xCE, 0xAC, FIL_,
+		0xCC, 0x94, FIL_, 0xE1, 0xBC, 0x81, FIL_, 0xCC,
+		0x93, FIL_, 0xE1, 0xBC, 0x80, FIL_, 0xCD, 0x82,
+		FIL_, 0xE1, 0xBE, 0xB6, FIL_, 0x04, 0xCC, 0x93,
+		FIL_, 0xE1, 0xBC, 0x90, FIL_, 0xCC, 0x80, FIL_,
+		0xE1, 0xBD, 0xB2, FIL_, 0xCC, 0x94, FIL_, 0xE1,
+		0xBC, 0x91, FIL_, 0xCC, 0x81, FIL_, 0xCE, 0xAD,
+		FIL_, 0x06, 0xCC, 0x94, FIL_, 0xE1, 0xBC, 0xA1,
+		FIL_, 0xCC, 0x81, FIL_, 0xCE, 0xAE, FIL_, 0xCD,
+		0x85, FIL_, 0xE1, 0xBF, 0x83, FIL_, 0xCD, 0x82,
+		FIL_, 0xE1, 0xBF, 0x86, FIL_, 0xCC, 0x93, FIL_,
+		0xE1, 0xBC, 0xA0, FIL_, 0xCC, 0x80, FIL_, 0xE1,
+		0xBD, 0xB4, FIL_, 0x08, 0xCC, 0x88, FIL_, 0xCF,
+		0x8A, FIL_, 0xCC, 0x81, FIL_, 0xCE, 0xAF, FIL_,
+		0xCC, 0x93, FIL_, 0xE1, 0xBC, 0xB0, FIL_, 0xCC,
+		0x94, FIL_, 0xE1, 0xBC, 0xB1, FIL_, 0xCC, 0x80,
+		FIL_, 0xE1, 0xBD, 0xB6, FIL_, 0xCC, 0x86, FIL_,
+		0xE1, 0xBF, 0x90, FIL_, 0xCC, 0x84, FIL_, 0xE1,
+		0xBF, 0x91, FIL_, 0xCD, 0x82, FIL_, 0xE1, 0xBF,
+		0x96, FIL_, 0x04, 0xCC, 0x93, FIL_, 0xE1, 0xBD,
+		0x80, FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBD, 0xB8,
+		FIL_, 0xCC, 0x94, FIL_, 0xE1, 0xBD, 0x81, FIL_,
+		0xCC, 0x81, FIL_, 0xCF, 0x8C, FIL_, 0x02, 0xCC,
+		0x93, FIL_, 0xE1, 0xBF, 0xA4, FIL_, 0xCC, 0x94,
+		FIL_, 0xE1, 0xBF, 0xA5, FIL_, 0x08, 0xCC, 0x81,
+		FIL_, 0xCF, 0x8D, FIL_, 0xCC, 0x94, FIL_, 0xE1,
+		0xBD, 0x91, FIL_, 0xCD, 0x82, FIL_, 0xE1, 0xBF,
+		0xA6, FIL_, 0xCC, 0x88, FIL_, 0xCF, 0x8B, FIL_,
+		0xCC, 0x84, FIL_, 0xE1, 0xBF, 0xA1, FIL_, 0xCC,
+		0x80, FIL_, 0xE1, 0xBD, 0xBA, FIL_, 0xCC, 0x93,
+		FIL_, 0xE1, 0xBD, 0x90, FIL_, 0xCC, 0x86, FIL_,
+		0xE1, 0xBF, 0xA0, FIL_, 0x06, 0xCC, 0x80, FIL_,
+		0xE1, 0xBD, 0xBC, FIL_, 0xCC, 0x94, FIL_, 0xE1,
+		0xBD, 0xA1, FIL_, 0xCC, 0x93, FIL_, 0xE1, 0xBD,
+		0xA0, FIL_, 0xCC, 0x81, FIL_, 0xCF, 0x8E, FIL_,
+		0xCD, 0x85, FIL_, 0xE1, 0xBF, 0xB3, FIL_, 0xCD,
+		0x82, FIL_, 0xE1, 0xBF, 0xB6, FIL_, 0x03, 0xCC,
+		0x80, FIL_, 0xE1, 0xBF, 0x92, FIL_, 0xCD, 0x82,
+		FIL_, 0xE1, 0xBF, 0x97, FIL_, 0xCC, 0x81, FIL_,
+		0xCE, 0x90, FIL_, 0x03, 0xCD, 0x82, FIL_, 0xE1,
+		0xBF, 0xA7, FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBF,
+		0xA2, FIL_, 0xCC, 0x81, FIL_, 0xCE, 0xB0, FIL_,
+		0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBF, 0xB4, FIL_,
+		0x02, 0xCC, 0x88, FIL_, 0xCF, 0x94, FIL_, 0xCC,
+		0x81, FIL_, 0xCF, 0x93, FIL_, 0x01, 0xCC, 0x88,
+		FIL_, 0xD0, 0x87, FIL_, 0x02, 0xCC, 0x88, FIL_,
+		0xD3, 0x92, FIL_, 0xCC, 0x86, FIL_, 0xD3, 0x90,
+		FIL_, 0x01, 0xCC, 0x81, FIL_, 0xD0, 0x83, FIL_,
+		0x03, 0xCC, 0x88, FIL_, 0xD0, 0x81, FIL_, 0xCC,
+		0x80, FIL_, 0xD0, 0x80, FIL_, 0xCC, 0x86, FIL_,
+		0xD3, 0x96, FIL_, 0x02, 0xCC, 0x86, FIL_, 0xD3,
+		0x81, FIL_, 0xCC, 0x88, FIL_, 0xD3, 0x9C, FIL_,
+		0x01, 0xCC, 0x88, FIL_, 0xD3, 0x9E, FIL_, 0x04,
+		0xCC, 0x84, FIL_, 0xD3, 0xA2, FIL_, 0xCC, 0x88,
+		FIL_, 0xD3, 0xA4, FIL_, 0xCC, 0x86, FIL_, 0xD0,
+		0x99, FIL_, 0xCC, 0x80, FIL_, 0xD0, 0x8D, FIL_,
+		0x01, 0xCC, 0x81, FIL_, 0xD0, 0x8C, FIL_, 0x01,
+		0xCC, 0x88, FIL_, 0xD3, 0xA6, FIL_, 0x04, 0xCC,
+		0x8B, FIL_, 0xD3, 0xB2, FIL_, 0xCC, 0x88, FIL_,
+		0xD3, 0xB0, FIL_, 0xCC, 0x86, FIL_, 0xD0, 0x8E,
+		FIL_, 0xCC, 0x84, FIL_, 0xD3, 0xAE, FIL_, 0x01,
+		0xCC, 0x88, FIL_, 0xD3, 0xB4, FIL_, 0x01, 0xCC,
+		0x88, FIL_, 0xD3, 0xB8, FIL_, 0x01, 0xCC, 0x88,
+		FIL_, 0xD3, 0xAC, FIL_, 0x02, 0xCC, 0x86, FIL_,
+		0xD3, 0x91, FIL_, 0xCC, 0x88, FIL_, 0xD3, 0x93,
+		FIL_, 0x01, 0xCC, 0x81, FIL_, 0xD1, 0x93, FIL_,
+		0x03, 0xCC, 0x80, FIL_, 0xD1, 0x90, FIL_, 0xCC,
+		0x86, FIL_, 0xD3, 0x97, FIL_, 0xCC, 0x88, FIL_,
+		0xD1, 0x91, FIL_, 0x02, 0xCC, 0x86, FIL_, 0xD3,
+		0x82, FIL_, 0xCC, 0x88, FIL_, 0xD3, 0x9D, FIL_,
+		0x01, 0xCC, 0x88, FIL_, 0xD3, 0x9F, FIL_, 0x04,
+		0xCC, 0x86, FIL_, 0xD0, 0xB9, FIL_, 0xCC, 0x88,
+		FIL_, 0xD3, 0xA5, FIL_, 0xCC, 0x84, FIL_, 0xD3,
+		0xA3, FIL_, 0xCC, 0x80, FIL_, 0xD1, 0x9D, FIL_,
+		0x01, 0xCC, 0x81, FIL_, 0xD1, 0x9C, FIL_, 0x01,
+		0xCC, 0x88, FIL_, 0xD3, 0xA7, FIL_, 0x04, 0xCC,
+		0x8B, FIL_, 0xD3, 0xB3, FIL_, 0xCC, 0x84, FIL_,
+		0xD3, 0xAF, FIL_, 0xCC, 0x86, FIL_, 0xD1, 0x9E,
+		FIL_, 0xCC, 0x88, FIL_, 0xD3, 0xB1, FIL_, 0x01,
+		0xCC, 0x88, FIL_, 0xD3, 0xB5, FIL_, 0x01, 0xCC,
+		0x88, FIL_, 0xD3, 0xB9, FIL_, 0x01, 0xCC, 0x88,
+		FIL_, 0xD3, 0xAD, FIL_, 0x01, 0xCC, 0x88, FIL_,
+		0xD1, 0x97, FIL_, 0x01, 0xCC, 0x8F, FIL_, 0xD1,
+		0xB6, FIL_, 0x01, 0xCC, 0x8F, FIL_, 0xD1, 0xB7,
+		FIL_, 0x01, 0xCC, 0x88, FIL_, 0xD3, 0x9A, FIL_,
+		0x01, 0xCC, 0x88, FIL_, 0xD3, 0x9B, FIL_, 0x01,
+		0xCC, 0x88, FIL_, 0xD3, 0xAA, FIL_, 0x01, 0xCC,
+		0x88, FIL_, 0xD3, 0xAB, FIL_, 0x03, 0xD9, 0x94,
+		FIL_, 0xD8, 0xA3, FIL_, 0xD9, 0x95, FIL_, 0xD8,
+		0xA5, FIL_, 0xD9, 0x93, FIL_, 0xD8, 0xA2, FIL_,
+		0x01, 0xD9, 0x94, FIL_, 0xD8, 0xA4, FIL_, 0x01,
+		0xD9, 0x94, FIL_, 0xD8, 0xA6, FIL_, 0x01, 0xD9,
+		0x94, FIL_, 0xDB, 0x82, FIL_, 0x01, 0xD9, 0x94,
+		FIL_, 0xDB, 0x93, FIL_, 0x01, 0xD9, 0x94, FIL_,
+		0xDB, 0x80, FIL_, 0x01, 0xE0, 0xA4, 0xBC, FIL_,
+		0xE0, 0xA4, 0xA9, FIL_, 0x01, 0xE0, 0xA4, 0xBC,
+		FIL_, 0xE0, 0xA4, 0xB1, FIL_, 0x01, 0xE0, 0xA4,
+		0xBC, FIL_, 0xE0, 0xA4, 0xB4, FIL_, 0x02, 0xE0,
+		0xA6, 0xBE, FIL_, 0xE0, 0xA7, 0x8B, FIL_, 0xE0,
+		0xA7, 0x97, FIL_, 0xE0, 0xA7, 0x8C, FIL_, 0x03,
+		0xE0, 0xAD, 0x96, FIL_, 0xE0, 0xAD, 0x88, FIL_,
+		0xE0, 0xAC, 0xBE, FIL_, 0xE0, 0xAD, 0x8B, FIL_,
+		0xE0, 0xAD, 0x97, FIL_, 0xE0, 0xAD, 0x8C, FIL_,
+		0x01, 0xE0, 0xAF, 0x97, FIL_, 0xE0, 0xAE, 0x94,
+		FIL_, 0x02, 0xE0, 0xAF, 0x97, FIL_, 0xE0, 0xAF,
+		0x8C, FIL_, 0xE0, 0xAE, 0xBE, FIL_, 0xE0, 0xAF,
+		0x8A, FIL_, 0x01, 0xE0, 0xAE, 0xBE, FIL_, 0xE0,
+		0xAF, 0x8B, FIL_, 0x01, 0xE0, 0xB1, 0x96, FIL_,
+		0xE0, 0xB1, 0x88, FIL_, 0x01, 0xE0, 0xB3, 0x95,
+		FIL_, 0xE0, 0xB3, 0x80, FIL_, 0x03, 0xE0, 0xB3,
+		0x82, FIL_, 0xE0, 0xB3, 0x8A, FIL_, 0xE0, 0xB3,
+		0x96, FIL_, 0xE0, 0xB3, 0x88, FIL_, 0xE0, 0xB3,
+		0x95, FIL_, 0xE0, 0xB3, 0x87, FIL_, 0x01, 0xE0,
+		0xB3, 0x95, FIL_, 0xE0, 0xB3, 0x8B, FIL_, 0x02,
+		0xE0, 0xB4, 0xBE, FIL_, 0xE0, 0xB5, 0x8A, FIL_,
+		0xE0, 0xB5, 0x97, FIL_, 0xE0, 0xB5, 0x8C, FIL_,
+		0x01, 0xE0, 0xB4, 0xBE, FIL_, 0xE0, 0xB5, 0x8B,
+		FIL_, 0x03, 0xE0, 0xB7, 0x9F, FIL_, 0xE0, 0xB7,
+		0x9E, FIL_, 0xE0, 0xB7, 0x8A, FIL_, 0xE0, 0xB7,
+		0x9A, FIL_, 0xE0, 0xB7, 0x8F, FIL_, 0xE0, 0xB7,
+		0x9C, FIL_, 0x01, 0xE0, 0xB7, 0x8A, FIL_, 0xE0,
+		0xB7, 0x9D, FIL_, 0x01, 0xE1, 0x80, 0xAE, FIL_,
+		0xE1, 0x80, 0xA6, FIL_, 0x01, 0xE1, 0xAC, 0xB5,
+		FIL_, 0xE1, 0xAC, 0x86, FIL_, 0x01, 0xE1, 0xAC,
+		0xB5, FIL_, 0xE1, 0xAC, 0x88, FIL_, 0x01, 0xE1,
+		0xAC, 0xB5, FIL_, 0xE1, 0xAC, 0x8A, FIL_, 0x01,
+		0xE1, 0xAC, 0xB5, FIL_, 0xE1, 0xAC, 0x8C, FIL_,
+		0x01, 0xE1, 0xAC, 0xB5, FIL_, 0xE1, 0xAC, 0x8E,
+		FIL_, 0x01, 0xE1, 0xAC, 0xB5, FIL_, 0xE1, 0xAC,
+		0x92, FIL_, 0x01, 0xE1, 0xAC, 0xB5, FIL_, 0xE1,
+		0xAC, 0xBB, FIL_, 0x01, 0xE1, 0xAC, 0xB5, FIL_,
+		0xE1, 0xAC, 0xBD, FIL_, 0x01, 0xE1, 0xAC, 0xB5,
+		FIL_, 0xE1, 0xAD, 0x80, FIL_, 0x01, 0xE1, 0xAC,
+		0xB5, FIL_, 0xE1, 0xAD, 0x81, FIL_, 0x01, 0xE1,
+		0xAC, 0xB5, FIL_, 0xE1, 0xAD, 0x83, FIL_, 0x01,
+		0xCC, 0x84, FIL_, 0xE1, 0xB8, 0xB8, FIL_, 0x01,
+		0xCC, 0x84, FIL_, 0xE1, 0xB8, 0xB9, FIL_, 0x01,
+		0xCC, 0x84, FIL_, 0xE1, 0xB9, 0x9C, FIL_, 0x01,
+		0xCC, 0x84, FIL_, 0xE1, 0xB9, 0x9D, FIL_, 0x01,
+		0xCC, 0x87, FIL_, 0xE1, 0xB9, 0xA8, FIL_, 0x01,
+		0xCC, 0x87, FIL_, 0xE1, 0xB9, 0xA9, FIL_, 0x02,
+		0xCC, 0x86, FIL_, 0xE1, 0xBA, 0xB6, FIL_, 0xCC,
+		0x82, FIL_, 0xE1, 0xBA, 0xAC, FIL_, 0x02, 0xCC,
+		0x82, FIL_, 0xE1, 0xBA, 0xAD, FIL_, 0xCC, 0x86,
+		FIL_, 0xE1, 0xBA, 0xB7, FIL_, 0x01, 0xCC, 0x82,
+		FIL_, 0xE1, 0xBB, 0x86, FIL_, 0x01, 0xCC, 0x82,
+		FIL_, 0xE1, 0xBB, 0x87, FIL_, 0x01, 0xCC, 0x82,
+		FIL_, 0xE1, 0xBB, 0x98, FIL_, 0x01, 0xCC, 0x82,
+		FIL_, 0xE1, 0xBB, 0x99, FIL_, 0x04, 0xCD, 0x85,
+		FIL_, 0xE1, 0xBE, 0x80, FIL_, 0xCD, 0x82, FIL_,
+		0xE1, 0xBC, 0x86, FIL_, 0xCC, 0x80, FIL_, 0xE1,
+		0xBC, 0x82, FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBC,
+		0x84, FIL_, 0x04, 0xCD, 0x82, FIL_, 0xE1, 0xBC,
+		0x87, FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBC, 0x85,
+		FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBC, 0x83, FIL_,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x81, FIL_, 0x01,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x82, FIL_, 0x01,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x83, FIL_, 0x01,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x84, FIL_, 0x01,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x85, FIL_, 0x01,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x86, FIL_, 0x01,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x87, FIL_, 0x04,
+		0xCC, 0x81, FIL_, 0xE1, 0xBC, 0x8C, FIL_, 0xCC,
+		0x80, FIL_, 0xE1, 0xBC, 0x8A, FIL_, 0xCD, 0x85,
+		FIL_, 0xE1, 0xBE, 0x88, FIL_, 0xCD, 0x82, FIL_,
+		0xE1, 0xBC, 0x8E, FIL_, 0x04, 0xCC, 0x80, FIL_,
+		0xE1, 0xBC, 0x8B, FIL_, 0xCD, 0x82, FIL_, 0xE1,
+		0xBC, 0x8F, FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBC,
+		0x8D, FIL_, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x89,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x8A,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x8B,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x8C,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x8D,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x8E,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x8F,
+		FIL_, 0x02, 0xCC, 0x80, FIL_, 0xE1, 0xBC, 0x92,
+		FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBC, 0x94, FIL_,
+		0x02, 0xCC, 0x80, FIL_, 0xE1, 0xBC, 0x93, FIL_,
+		0xCC, 0x81, FIL_, 0xE1, 0xBC, 0x95, FIL_, 0x02,
+		0xCC, 0x80, FIL_, 0xE1, 0xBC, 0x9A, FIL_, 0xCC,
+		0x81, FIL_, 0xE1, 0xBC, 0x9C, FIL_, 0x02, 0xCC,
+		0x80, FIL_, 0xE1, 0xBC, 0x9B, FIL_, 0xCC, 0x81,
+		FIL_, 0xE1, 0xBC, 0x9D, FIL_, 0x04, 0xCC, 0x80,
+		FIL_, 0xE1, 0xBC, 0xA2, FIL_, 0xCC, 0x81, FIL_,
+		0xE1, 0xBC, 0xA4, FIL_, 0xCD, 0x82, FIL_, 0xE1,
+		0xBC, 0xA6, FIL_, 0xCD, 0x85, FIL_, 0xE1, 0xBE,
+		0x90, FIL_, 0x04, 0xCD, 0x85, FIL_, 0xE1, 0xBE,
+		0x91, FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBC, 0xA5,
+		FIL_, 0xCD, 0x82, FIL_, 0xE1, 0xBC, 0xA7, FIL_,
+		0xCC, 0x80, FIL_, 0xE1, 0xBC, 0xA3, FIL_, 0x01,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x92, FIL_, 0x01,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x93, FIL_, 0x01,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x94, FIL_, 0x01,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x95, FIL_, 0x01,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x96, FIL_, 0x01,
+		0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x97, FIL_, 0x04,
+		0xCC, 0x81, FIL_, 0xE1, 0xBC, 0xAC, FIL_, 0xCC,
+		0x80, FIL_, 0xE1, 0xBC, 0xAA, FIL_, 0xCD, 0x85,
+		FIL_, 0xE1, 0xBE, 0x98, FIL_, 0xCD, 0x82, FIL_,
+		0xE1, 0xBC, 0xAE, FIL_, 0x04, 0xCD, 0x82, FIL_,
+		0xE1, 0xBC, 0xAF, FIL_, 0xCD, 0x85, FIL_, 0xE1,
+		0xBE, 0x99, FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBC,
+		0xAD, FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBC, 0xAB,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x9A,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x9B,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x9C,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x9D,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x9E,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0x9F,
+		FIL_, 0x03, 0xCC, 0x81, FIL_, 0xE1, 0xBC, 0xB4,
+		FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBC, 0xB2, FIL_,
+		0xCD, 0x82, FIL_, 0xE1, 0xBC, 0xB6, FIL_, 0x03,
+		0xCC, 0x80, FIL_, 0xE1, 0xBC, 0xB3, FIL_, 0xCD,
+		0x82, FIL_, 0xE1, 0xBC, 0xB7, FIL_, 0xCC, 0x81,
+		FIL_, 0xE1, 0xBC, 0xB5, FIL_, 0x03, 0xCC, 0x81,
+		FIL_, 0xE1, 0xBC, 0xBC, FIL_, 0xCC, 0x80, FIL_,
+		0xE1, 0xBC, 0xBA, FIL_, 0xCD, 0x82, FIL_, 0xE1,
+		0xBC, 0xBE, FIL_, 0x03, 0xCC, 0x80, FIL_, 0xE1,
+		0xBC, 0xBB, FIL_, 0xCD, 0x82, FIL_, 0xE1, 0xBC,
+		0xBF, FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBC, 0xBD,
+		FIL_, 0x02, 0xCC, 0x80, FIL_, 0xE1, 0xBD, 0x82,
+		FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBD, 0x84, FIL_,
+		0x02, 0xCC, 0x81, FIL_, 0xE1, 0xBD, 0x85, FIL_,
+		0xCC, 0x80, FIL_, 0xE1, 0xBD, 0x83, FIL_, 0x02,
+		0xCC, 0x80, FIL_, 0xE1, 0xBD, 0x8A, FIL_, 0xCC,
+		0x81, FIL_, 0xE1, 0xBD, 0x8C, FIL_, 0x02, 0xCC,
+		0x80, FIL_, 0xE1, 0xBD, 0x8B, FIL_, 0xCC, 0x81,
+		FIL_, 0xE1, 0xBD, 0x8D, FIL_, 0x03, 0xCD, 0x82,
+		FIL_, 0xE1, 0xBD, 0x96, FIL_, 0xCC, 0x80, FIL_,
+		0xE1, 0xBD, 0x92, FIL_, 0xCC, 0x81, FIL_, 0xE1,
+		0xBD, 0x94, FIL_, 0x03, 0xCC, 0x80, FIL_, 0xE1,
+		0xBD, 0x93, FIL_, 0xCD, 0x82, FIL_, 0xE1, 0xBD,
+		0x97, FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBD, 0x95,
+		FIL_, 0x03, 0xCC, 0x80, FIL_, 0xE1, 0xBD, 0x9B,
+		FIL_, 0xCD, 0x82, FIL_, 0xE1, 0xBD, 0x9F, FIL_,
+		0xCC, 0x81, FIL_, 0xE1, 0xBD, 0x9D, FIL_, 0x04,
+		0xCD, 0x82, FIL_, 0xE1, 0xBD, 0xA6, FIL_, 0xCD,
+		0x85, FIL_, 0xE1, 0xBE, 0xA0, FIL_, 0xCC, 0x80,
+		FIL_, 0xE1, 0xBD, 0xA2, FIL_, 0xCC, 0x81, FIL_,
+		0xE1, 0xBD, 0xA4, FIL_, 0x04, 0xCD, 0x85, FIL_,
+		0xE1, 0xBE, 0xA1, FIL_, 0xCD, 0x82, FIL_, 0xE1,
+		0xBD, 0xA7, FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBD,
+		0xA5, FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBD, 0xA3,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0xA2,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0xA3,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0xA4,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0xA5,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0xA6,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBE, 0xA7,
+		FIL_, 0x04, 0xCC, 0x80, FIL_, 0xE1, 0xBD, 0xAA,
+		FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBD, 0xAC, FIL_,
+		0xCD, 0x82, FIL_, 0xE1, 0xBD, 0xAE, FIL_, 0xCD,
+		0x85, FIL_, 0xE1, 0xBE, 0xA8, FIL_, 0x04, 0xCD,
+		0x82, FIL_, 0xE1, 0xBD, 0xAF, FIL_, 0xCC, 0x80,
+		FIL_, 0xE1, 0xBD, 0xAB, FIL_, 0xCD, 0x85, FIL_,
+		0xE1, 0xBE, 0xA9, FIL_, 0xCC, 0x81, FIL_, 0xE1,
+		0xBD, 0xAD, FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1,
+		0xBE, 0xAA, FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1,
+		0xBE, 0xAB, FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1,
+		0xBE, 0xAC, FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1,
+		0xBE, 0xAD, FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1,
+		0xBE, 0xAE, FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1,
+		0xBE, 0xAF, FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1,
+		0xBE, 0xB2, FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1,
+		0xBF, 0x82, FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1,
+		0xBF, 0xB2, FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1,
+		0xBE, 0xB7, FIL_, 0x03, 0xCC, 0x81, FIL_, 0xE1,
+		0xBF, 0x8E, FIL_, 0xCC, 0x80, FIL_, 0xE1, 0xBF,
+		0x8D, FIL_, 0xCD, 0x82, FIL_, 0xE1, 0xBF, 0x8F,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBF, 0x87,
+		FIL_, 0x01, 0xCD, 0x85, FIL_, 0xE1, 0xBF, 0xB7,
+		FIL_, 0x03, 0xCC, 0x80, FIL_, 0xE1, 0xBF, 0x9D,
+		FIL_, 0xCC, 0x81, FIL_, 0xE1, 0xBF, 0x9E, FIL_,
+		0xCD, 0x82, FIL_, 0xE1, 0xBF, 0x9F, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x86, 0x9A, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x86, 0x9B, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x86, 0xAE, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x87, 0x8D, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x87, 0x8F, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x87, 0x8E, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x88, 0x84, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x88, 0x89, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x88, 0x8C, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x88, 0xA4, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x88, 0xA6, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x89, 0x81, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x89, 0x84, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x89, 0x87, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x89, 0x89, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x89, 0xAD, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x89, 0xA2, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x89, 0xB0, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x89, 0xB1, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x89, 0xB4, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x89, 0xB5, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x89, 0xB8, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x89, 0xB9, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8A, 0x80, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8A, 0x81, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8B, 0xA0, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8B, 0xA1, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8A, 0x84, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8A, 0x85, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8A, 0x88, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8A, 0x89, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8B, 0xA2, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8B, 0xA3, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8A, 0xAC, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8A, 0xAD, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8A, 0xAE, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8A, 0xAF, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8B, 0xAA, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8B, 0xAB, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8B, 0xAC, FIL_, 0x01,
+		0xCC, 0xB8, FIL_, 0xE2, 0x8B, 0xAD, FIL_, 0x01,
+		0xE3, 0x82, 0x99, FIL_, 0xE3, 0x82, 0x94, FIL_,
+		0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3, 0x81, 0x8C,
+		FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3, 0x81,
+		0x8E, FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3,
+		0x81, 0x90, FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_,
+		0xE3, 0x81, 0x92, FIL_, 0x01, 0xE3, 0x82, 0x99,
+		FIL_, 0xE3, 0x81, 0x94, FIL_, 0x01, 0xE3, 0x82,
+		0x99, FIL_, 0xE3, 0x81, 0x96, FIL_, 0x01, 0xE3,
+		0x82, 0x99, FIL_, 0xE3, 0x81, 0x98, FIL_, 0x01,
+		0xE3, 0x82, 0x99, FIL_, 0xE3, 0x81, 0x9A, FIL_,
+		0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3, 0x81, 0x9C,
+		FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3, 0x81,
+		0x9E, FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3,
+		0x81, 0xA0, FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_,
+		0xE3, 0x81, 0xA2, FIL_, 0x01, 0xE3, 0x82, 0x99,
+		FIL_, 0xE3, 0x81, 0xA5, FIL_, 0x01, 0xE3, 0x82,
+		0x99, FIL_, 0xE3, 0x81, 0xA7, FIL_, 0x01, 0xE3,
+		0x82, 0x99, FIL_, 0xE3, 0x81, 0xA9, FIL_, 0x02,
+		0xE3, 0x82, 0x9A, FIL_, 0xE3, 0x81, 0xB1, FIL_,
+		0xE3, 0x82, 0x99, FIL_, 0xE3, 0x81, 0xB0, FIL_,
+		0x02, 0xE3, 0x82, 0x99, FIL_, 0xE3, 0x81, 0xB3,
+		FIL_, 0xE3, 0x82, 0x9A, FIL_, 0xE3, 0x81, 0xB4,
+		FIL_, 0x02, 0xE3, 0x82, 0x99, FIL_, 0xE3, 0x81,
+		0xB6, FIL_, 0xE3, 0x82, 0x9A, FIL_, 0xE3, 0x81,
+		0xB7, FIL_, 0x02, 0xE3, 0x82, 0x9A, FIL_, 0xE3,
+		0x81, 0xBA, FIL_, 0xE3, 0x82, 0x99, FIL_, 0xE3,
+		0x81, 0xB9, FIL_, 0x02, 0xE3, 0x82, 0x9A, FIL_,
+		0xE3, 0x81, 0xBD, FIL_, 0xE3, 0x82, 0x99, FIL_,
+		0xE3, 0x81, 0xBC, FIL_, 0x01, 0xE3, 0x82, 0x99,
+		FIL_, 0xE3, 0x82, 0x9E, FIL_, 0x01, 0xE3, 0x82,
+		0x99, FIL_, 0xE3, 0x83, 0xB4, FIL_, 0x01, 0xE3,
+		0x82, 0x99, FIL_, 0xE3, 0x82, 0xAC, FIL_, 0x01,
+		0xE3, 0x82, 0x99, FIL_, 0xE3, 0x82, 0xAE, FIL_,
+		0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3, 0x82, 0xB0,
+		FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3, 0x82,
+		0xB2, FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3,
+		0x82, 0xB4, FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_,
+		0xE3, 0x82, 0xB6, FIL_, 0x01, 0xE3, 0x82, 0x99,
+		FIL_, 0xE3, 0x82, 0xB8, FIL_, 0x01, 0xE3, 0x82,
+		0x99, FIL_, 0xE3, 0x82, 0xBA, FIL_, 0x01, 0xE3,
+		0x82, 0x99, FIL_, 0xE3, 0x82, 0xBC, FIL_, 0x01,
+		0xE3, 0x82, 0x99, FIL_, 0xE3, 0x82, 0xBE, FIL_,
+		0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3, 0x83, 0x80,
+		FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3, 0x83,
+		0x82, FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3,
+		0x83, 0x85, FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_,
+		0xE3, 0x83, 0x87, FIL_, 0x01, 0xE3, 0x82, 0x99,
+		FIL_, 0xE3, 0x83, 0x89, FIL_, 0x02, 0xE3, 0x82,
+		0x99, FIL_, 0xE3, 0x83, 0x90, FIL_, 0xE3, 0x82,
+		0x9A, FIL_, 0xE3, 0x83, 0x91, FIL_, 0x02, 0xE3,
+		0x82, 0x99, FIL_, 0xE3, 0x83, 0x93, FIL_, 0xE3,
+		0x82, 0x9A, FIL_, 0xE3, 0x83, 0x94, FIL_, 0x02,
+		0xE3, 0x82, 0x9A, FIL_, 0xE3, 0x83, 0x97, FIL_,
+		0xE3, 0x82, 0x99, FIL_, 0xE3, 0x83, 0x96, FIL_,
+		0x02, 0xE3, 0x82, 0x9A, FIL_, 0xE3, 0x83, 0x9A,
+		FIL_, 0xE3, 0x82, 0x99, FIL_, 0xE3, 0x83, 0x99,
+		FIL_, 0x02, 0xE3, 0x82, 0x99, FIL_, 0xE3, 0x83,
+		0x9C, FIL_, 0xE3, 0x82, 0x9A, FIL_, 0xE3, 0x83,
+		0x9D, FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_, 0xE3,
+		0x83, 0xB7, FIL_, 0x01, 0xE3, 0x82, 0x99, FIL_,
+		0xE3, 0x83, 0xB8, FIL_, 0x01, 0xE3, 0x82, 0x99,
+		FIL_, 0xE3, 0x83, 0xB9, FIL_, 0x01, 0xE3, 0x82,
+		0x99, FIL_, 0xE3, 0x83, 0xBA, FIL_, 0x01, 0xE3,
+		0x82, 0x99, FIL_, 0xE3, 0x83, 0xBE, FIL_,
+	},
+};
+
+static const uchar_t u8_decomp_b2_tbl[2][2][256] = {
+	{
+		{
+			0,  N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			1,  2,  3,  4,  N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, 5,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, 6,  N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, 7,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+
+	},
+	{
+		{
+			0,  N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			1,  2,  3,  4,  N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, 5,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, 6,  N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, 7,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+
+	},
+
+};
+
+static const u8_displacement_t u8_decomp_b3_tbl[2][8][256] = {
+	{
+		{	/* Third byte table 0. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 0, 0 },
+			{ 1, 35 }, { 2, 247 }, { 3, 474 },
+			{ 4, 693 }, { 5, 709 }, { 6, 951 },
+			{ N_, 0 }, { 7, 1139 }, { 8, 1152 },
+			{ N_, 0 }, { 9, 1177 }, { 10, 1199 },
+			{ 11, 1295 }, { 12, 1360 }, { 13, 1405 },
+			{ N_, 0 }, { 14, 1450 }, { N_, 0 },
+			{ N_, 0 }, { 15, 1620 }, { N_, 0 },
+			{ 16, 1624 }, { 17, 1649 }, { N_, 0 },
+			{ 18, 1665 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+		{	/* Third byte table 1. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 19, 1680 },
+			{ 20, 1701 }, { N_, 0 }, { 21, 1757 },
+			{ 22, 1792 }, { 23, 1806 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 24, 1834 },
+			{ 25, 1869 }, { 26, 1876 }, { N_, 0 },
+			{ 27, 1897 }, { N_, 0 }, { 28, 1904 },
+			{ N_, 0 }, { 29, 1942 }, { N_, 0 },
+			{ 30, 1963 }, { 31, 1994 }, { N_, 0 },
+			{ 32, 2000 }, { 33, 2006 }, { 34, 2018 },
+			{ 35, 2021 }, { 36, 2109 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+		{	/* Third byte table 2. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 37, 2158 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { 0x8000, 2165 }, { 0x8001, 2445 },
+			{ 0x8002, 2741 }, { 0x8003, 3029 }, { 0x8004, 3337 },
+			{ 0x8005, 3725 }, { 0x8006, 4053 }, { 0x8007, 4536 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+		{	/* Third byte table 3. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 38, 4895 },
+			{ 39, 4964 }, { 40, 4999 }, { N_, 0 },
+			{ 41, 5018 }, { 42, 5098 }, { 43, 5230 },
+			{ 44, 5248 }, { 45, 5266 }, { 46, 5326 },
+			{ 47, 5410 }, { 48, 5470 }, { 49, 5518 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { 50, 5526 }, { 51, 5596 },
+			{ 52, 5767 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ 53, 5810 }, { 54, 5822 }, { N_, 0 },
+			{ 55, 5830 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ 56, 5836 }, { 57, 5839 }, { 58, 5842 },
+			{ 59, 6034 }, { 60, 6226 }, { 61, 6418 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+		{	/* Third byte table 4. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
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+			{ N_, 0 }, { N_, 0 }, { 62, 6484 },
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+			{ N_, 0 }, { 0x8008, 7247 }, { 69, 7597 },
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+			{ N_, 0 }, { N_, 0 }, { 0x800B, 9743 },
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+		},
+	},
+	{
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+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 0, 0 },
+			{ 1, 35 }, { 2, 247 }, { 3, 474 },
+			{ 4, 693 }, { 5, 709 }, { 6, 951 },
+			{ N_, 0 }, { 7, 1139 }, { 8, 1152 },
+			{ N_, 0 }, { 9, 1177 }, { 10, 1199 },
+			{ 11, 1295 }, { 12, 1362 }, { 13, 1407 },
+			{ N_, 0 }, { 14, 1452 }, { N_, 0 },
+			{ N_, 0 }, { 15, 1622 }, { N_, 0 },
+			{ 16, 1626 }, { 17, 1651 }, { N_, 0 },
+			{ 18, 1667 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
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+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
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+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+		{	/* Third byte table 1. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
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+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
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+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 19, 1682 },
+			{ 20, 1703 }, { N_, 0 }, { 21, 1759 },
+			{ 22, 1794 }, { 23, 1808 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 24, 1836 },
+			{ 25, 1871 }, { 26, 1878 }, { N_, 0 },
+			{ 27, 1899 }, { N_, 0 }, { 28, 1906 },
+			{ N_, 0 }, { 29, 1944 }, { N_, 0 },
+			{ 30, 1965 }, { 31, 1996 }, { N_, 0 },
+			{ 32, 2002 }, { 33, 2008 }, { 34, 2020 },
+			{ 35, 2023 }, { 36, 2111 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
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+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+		{	/* Third byte table 2. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
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+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 37, 2160 },
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+			{ N_, 0 }, { 39, 2170 }, { 40, 2226 },
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+			{ 41, 2247 }, { 42, 2268 }, { 43, 2340 },
+			{ N_, 0 }, { 0x8000, 2414 }, { 0x8001, 2694 },
+			{ 0x8002, 2990 }, { 0x8003, 3278 }, { 0x8004, 3586 },
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+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
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+			{ N_, 0 },
+		},
+		{	/* Third byte table 3. */
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+		},
+		{	/* Third byte table 4. */
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+		},
+		{	/* Third byte table 5. */
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+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 0x800B, 10106 },
+			{ 0x800C, 10362 }, { 0x800D, 10618 }, { 0x800E, 10874 },
+			{ 81, 11130 }, { 82, 11330 }, { 0x800F, 11566 },
+			{ 83, 11822 }, { 84, 11932 }, { 85, 12096 },
+			{ 86, 12261 }, { 87, 12369 }, { 0x8010, 12533 },
+			{ 0x8011, 12799 }, { 0x8012, 13073 }, { 0x8013, 13339 },
+			{ 88, 13605 }, { 0x8014, 13853 }, { 0x8015, 14141 },
+			{ 89, 14513 }, { 90, 14691 }, { 91, 14746 },
+			{ 92, 14860 }, { 93, 15012 }, { 94, 15162 },
+			{ 95, 15225 }, { 96, 15355 }, { 97, 15544 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+		{	/* Third byte table 6. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { 98, 15644 }, { 99, 15727 },
+			{ 100, 15784 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ 101, 15797 }, { 102, 15861 }, { 103, 15924 },
+			{ 104, 15978 }, { 105, 16041 }, { 106, 16098 },
+			{ 107, 16157 }, { 108, 16221 }, { 109, 16285 },
+			{ 110, 16349 }, { 111, 16413 }, { 112, 16501 },
+			{ 113, 16632 }, { 114, 16762 }, { 115, 16892 },
+			{ 116, 17022 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+		{	/* Third byte table 7. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { 0x8016, 17097 }, { 0x8017, 17360 },
+			{ 0x8018, 17623 }, { 0x8019, 17888 }, { 0x801A, 18153 },
+			{ 0x801B, 18425 }, { 0x801C, 18702 }, { 0x801D, 18971 },
+			{ 117, 19243 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 },
+		},
+	},
+};
+
+static const uchar_t u8_decomp_b4_tbl[2][118][257] = {
+	{
+		{	/* Fourth byte table 0. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   1,   1,   1,   1,   1,   1,
+			1,   4,   4,   5,   5,   5,   5,   5,
+			8,   8,   8,   9,   10,  13,  15,  15,
+			15,  18,  19,  20,  20,  25,  30,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,
+		},
+		{	/* Fourth byte table 1. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  24,
+			28,  32,  36,  40,  44,  48,  52,  56,
+			60,  60,  64,  68,  72,  76,  80,  84,
+			84,  84,  88,  92,  96,  100, 104, 104,
+			104, 108, 112, 116, 120, 124, 128, 128,
+			132, 136, 140, 144, 148, 152, 156, 160,
+			164, 164, 168, 172, 176, 180, 184, 188,
+			188, 188, 192, 196, 200, 204, 208, 208,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212,
+		},
+		{	/* Fourth byte table 2. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  64,  64,  68,  72,  76,  80,  84,
+			88,  92,  96,  100, 104, 108, 112, 116,
+			120, 124, 128, 132, 136, 140, 144, 144,
+			144, 148, 152, 156, 160, 164, 168, 172,
+			176, 180, 180, 182, 184, 188, 192, 196,
+			200, 200, 204, 208, 212, 216, 220, 224,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227,
+		},
+		{	/* Fourth byte table 3. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   3,   7,   11,  15,  19,
+			23,  27,  30,  30,  30,  34,  38,  42,
+			46,  50,  54,  54,  54,  58,  62,  66,
+			70,  74,  78,  82,  86,  90,  94,  98,
+			102, 106, 110, 114, 118, 122, 126, 126,
+			126, 130, 134, 138, 142, 146, 150, 154,
+			158, 162, 166, 170, 174, 178, 182, 186,
+			190, 194, 198, 202, 206, 210, 214, 218,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219,
+		},
+		{	/* Fourth byte table 4. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			12,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,
+		},
+		{	/* Fourth byte table 5. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   4,   8,   12,
+			14,  16,  18,  20,  22,  24,  28,  32,
+			36,  40,  44,  48,  52,  56,  62,  68,
+			74,  80,  86,  92,  98,  104, 104, 110,
+			116, 122, 128, 133, 138, 138, 138, 142,
+			146, 150, 154, 158, 162, 168, 174, 179,
+			184, 188, 190, 192, 194, 198, 202, 202,
+			202, 206, 210, 216, 222, 227, 232, 237,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242,
+		},
+		{	/* Fourth byte table 6. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  68,  72,  76,  80,  84,  88,  92,
+			96,  100, 104, 108, 112, 112, 112, 116,
+			120, 120, 120, 120, 120, 120, 120, 124,
+			128, 132, 136, 142, 148, 154, 160, 164,
+			168, 174, 180, 184, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188,
+		},
+		{	/* Fourth byte table 7. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   3,   4,   5,   7,   9,   11,
+			12,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,
+		},
+		{	/* Fourth byte table 8. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  18,
+			18,  20,  21,  22,  23,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,
+		},
+		{	/* Fourth byte table 9. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   6,   9,   14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  17,  17,  17,
+			17,  17,  17,  20,  20,  20,  20,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,
+		},
+		{	/* Fourth byte table 10. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   3,   14,  19,
+			22,  27,  32,  37,  37,  42,  42,  47,
+			52,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  64,  69,  74,  79,  84,
+			89,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 11. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   5,   10,  15,  20,  25,
+			25,  27,  29,  31,  41,  51,  53,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  57,  59,  61,  61,  63,  65,  65,
+			65,  65,  65,  65,  65,  65,  65,  65,
+			65,  65,  65,  65,  65,  65,  65,  65,
+			65,  65,  65,  65,  65,  65,  65,  65,
+			65,  65,  65,  65,  65,  65,  65,  65,
+			65,  65,  65,  65,  65,  65,  65,  65,
+			65,  65,  65,  65,  65,  65,  65,  65,
+			65,  65,  65,  65,  65,  65,  65,  65,
+			65,  65,  65,  65,  65,  65,  65,  65,
+			65,  65,  65,  65,  65,  65,  65,  65,
+			65,
+		},
+		{	/* Fourth byte table 12. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   5,   10,  10,  15,  15,  15,  15,
+			20,  20,  20,  20,  20,  25,  30,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  40,  40,  40,  40,  40,  40,
+			40,  40,  40,  40,  40,  40,  40,  40,
+			40,  40,  40,  40,  40,  40,  40,  40,
+			40,  40,  40,  40,  40,  40,  40,  40,
+			40,  40,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,
+		},
+		{	/* Fourth byte table 13. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   5,   10,  10,  15,  15,  15,  15,
+			20,  20,  20,  20,  20,  25,  30,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  40,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,
+		},
+		{	/* Fourth byte table 14. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   5,   10,  10,  10,  10,  10,
+			10,  10,  10,  10,  10,  10,  10,  10,
+			10,  15,  20,  25,  30,  30,  30,  35,
+			40,  40,  40,  45,  50,  55,  60,  65,
+			70,  70,  70,  75,  80,  85,  90,  95,
+			100, 100, 100, 105, 110, 115, 120, 125,
+			130, 135, 140, 145, 150, 155, 160, 160,
+			160, 165, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170,
+		},
+		{	/* Fourth byte table 15. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,
+		},
+		{	/* Fourth byte table 16. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   5,   10,  15,  20,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,
+		},
+		{	/* Fourth byte table 17. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   4,   8,
+			12,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,
+		},
+		{	/* Fourth byte table 18. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   5,   5,   10,  10,  10,  10,  10,
+			10,  10,  10,  10,  10,  10,  10,  10,
+			10,  10,  10,  10,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,
+		},
+		{	/* Fourth byte table 19. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   7,   7,   7,   7,   7,   7,
+			7,   7,   14,  14,  14,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 20. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   14,  21,  28,  35,  42,  49,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,
+		},
+		{	/* Fourth byte table 21. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  21,  28,  28,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,
+		},
+		{	/* Fourth byte table 22. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   7,   7,   14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,
+		},
+		{	/* Fourth byte table 23. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   7,   14,  21,  21,  21,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,
+		},
+		{	/* Fourth byte table 24. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   7,   7,   14,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  28,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,
+		},
+		{	/* Fourth byte table 25. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,
+		},
+		{	/* Fourth byte table 26. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   7,   14,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 27. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,
+		},
+		{	/* Fourth byte table 28. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   7,   7,   7,   7,   7,   7,
+			14,  21,  21,  28,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,
+		},
+		{	/* Fourth byte table 29. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   7,   14,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 30. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   7,   7,   14,  24,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,
+		},
+		{	/* Fourth byte table 31. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,
+		},
+		{	/* Fourth byte table 32. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,
+		},
+		{	/* Fourth byte table 33. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   6,   12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,
+		},
+		{	/* Fourth byte table 34. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,
+		},
+		{	/* Fourth byte table 35. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   14,  14,
+			14,  14,  14,  21,  21,  21,  21,  21,
+			28,  28,  28,  28,  28,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  49,  49,  56,  63,
+			72,  79,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,
+		},
+		{	/* Fourth byte table 36. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  21,  21,
+			21,  21,  21,  28,  28,  28,  28,  28,
+			35,  35,  35,  35,  35,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,
+		},
+		{	/* Fourth byte table 37. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,
+		},
+		{	/* Fourth byte table 38. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   6,   12,  13,  14,  15,  16,  17,
+			18,  19,  20,  21,  21,  21,  21,  21,
+			21,  21,  24,  24,  24,  24,  24,  24,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  28,  30,  33,
+			33,  33,  33,  33,  33,  33,  33,  33,
+			34,  34,  34,  34,  40,  49,  49,  55,
+			64,  64,  64,  64,  64,  66,  66,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,
+		},
+		{	/* Fourth byte table 39. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			2,   4,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  20,  21,  21,  21,  22,  23,  24,
+			25,  26,  27,  28,  31,  32,  33,  34,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,
+		},
+		{	/* Fourth byte table 40. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  14,  15,  16,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  17,  17,  17,  17,  17,  17,  17,
+			17,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,
+		},
+		{	/* Fourth byte table 41. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   7,   10,  10,  13,  16,
+			18,  18,  21,  22,  23,  24,  25,  26,
+			28,  29,  30,  31,  32,  32,  33,  35,
+			35,  35,  36,  37,  38,  39,  40,  40,
+			40,  42,  45,  47,  47,  48,  48,  51,
+			51,  52,  52,  54,  58,  59,  60,  60,
+			61,  62,  63,  63,  64,  65,  67,  69,
+			71,  73,  74,  74,  74,  74,  76,  78,
+			80,  80,  80,  80,  80,  80,  80,  80,
+			80,  80,  80,  80,  80,  80,  80,  80,
+			80,  80,  80,  80,  80,  80,  80,  80,
+			80,  80,  80,  80,  80,  80,  80,  80,
+			80,  80,  80,  80,  80,  80,  80,  80,
+			80,  80,  80,  80,  80,  80,  80,  80,
+			80,  80,  80,  80,  80,  80,  80,  80,
+			80,  80,  80,  80,  80,  80,  80,  80,
+			80,
+		},
+		{	/* Fourth byte table 42. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   3,   3,   3,   4,   5,
+			6,   7,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   13,  18,  23,  28,
+			33,  38,  43,  48,  53,  58,  63,  68,
+			72,  73,  75,  78,  80,  81,  83,  86,
+			90,  92,  93,  95,  98,  99,  100, 101,
+			102, 103, 105, 108, 110, 111, 113, 116,
+			120, 122, 123, 125, 128, 129, 130, 131,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132,
+		},
+		{	/* Fourth byte table 43. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   6,   12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,
+		},
+		{	/* Fourth byte table 44. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   6,   12,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,
+		},
+		{	/* Fourth byte table 45. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   6,   6,   6,
+			6,   6,   12,  12,  12,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  24,  24,  30,
+			30,  30,  30,  30,  30,  36,  45,  45,
+			51,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,
+		},
+		{	/* Fourth byte table 46. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   6,   6,   6,   12,  12,  12,
+			18,  18,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  28,  28,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  40,  44,
+			48,  54,  60,  60,  60,  66,  72,  72,
+			72,  78,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,
+		},
+		{	/* Fourth byte table 47. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   6,   12,  12,  12,  18,  24,  24,
+			24,  30,  36,  36,  36,  36,  36,  36,
+			36,  36,  36,  36,  36,  36,  36,  36,
+			36,  36,  36,  36,  36,  36,  36,  36,
+			36,  36,  36,  36,  36,  36,  36,  36,
+			36,  36,  36,  36,  36,  42,  48,  54,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,
+		},
+		{	/* Fourth byte table 48. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   6,   12,  18,  24,  24,  24,  24,
+			24,  24,  24,  30,  36,  42,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,
+		},
+		{	/* Fourth byte table 49. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   4,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,
+		},
+		{	/* Fourth byte table 50. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   11,  13,  15,  17,  19,  21,
+			23,  25,  27,  29,  31,  34,  37,  40,
+			43,  46,  49,  52,  55,  58,  62,  66,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,
+		},
+		{	/* Fourth byte table 51. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			48,  50,  53,  56,  59,  62,  65,  68,
+			71,  74,  77,  80,  83,  86,  89,  92,
+			95,  98,  101, 104, 107, 110, 113, 116,
+			119, 122, 125, 128, 131, 134, 137, 140,
+			143, 146, 149, 152, 155, 158, 161, 162,
+			163, 164, 165, 166, 167, 168, 169, 170,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171,
+		},
+		{	/* Fourth byte table 52. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  37,  38,  39,
+			40,  41,  42,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,
+		},
+		{	/* Fourth byte table 53. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,
+		},
+		{	/* Fourth byte table 54. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   3,   5,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,
+		},
+		{	/* Fourth byte table 55. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,
+		},
+		{	/* Fourth byte table 56. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,
+		},
+		{	/* Fourth byte table 57. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,
+		},
+		{	/* Fourth byte table 58. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			144, 147, 150, 153, 156, 159, 162, 165,
+			168, 171, 174, 177, 180, 183, 186, 189,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192,
+		},
+		{	/* Fourth byte table 59. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			144, 147, 150, 153, 156, 159, 162, 165,
+			168, 171, 174, 177, 180, 183, 186, 189,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192,
+		},
+		{	/* Fourth byte table 60. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			144, 147, 150, 153, 156, 159, 162, 165,
+			168, 171, 174, 177, 180, 183, 186, 189,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192,
+		},
+		{	/* Fourth byte table 61. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,
+		},
+		{	/* Fourth byte table 62. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   1,   1,   1,   1,   1,   1,
+			1,   1,   1,   1,   1,   1,   1,   1,
+			1,   1,   1,   1,   1,   1,   1,   1,
+			1,   1,   1,   1,   1,   1,   1,   1,
+			1,   1,   1,   1,   1,   1,   1,   1,
+			1,   1,   1,   1,   1,   1,   1,   1,
+			1,   1,   1,   1,   1,   1,   1,   4,
+			4,   7,   10,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,
+		},
+		{	/* Fourth byte table 63. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   7,   7,   14,
+			14,  21,  21,  28,  28,  35,  35,  42,
+			42,  49,  49,  56,  56,  63,  63,  70,
+			70,  77,  77,  84,  84,  84,  91,  91,
+			98,  98,  105, 105, 105, 105, 105, 105,
+			105, 112, 119, 119, 126, 133, 133, 140,
+			147, 147, 154, 161, 161, 168, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175,
+		},
+		{	/* Fourth byte table 64. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   7,   7,   7,
+			7,   7,   7,   7,   11,  15,  15,  22,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  35,  35,  42,
+			42,  49,  49,  56,  56,  63,  63,  70,
+			70,  77,  77,  84,  84,  91,  91,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,
+		},
+		{	/* Fourth byte table 65. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   7,   14,  14,  14,  21,  21,
+			28,  28,  35,  35,  35,  35,  35,  35,
+			35,  42,  49,  49,  56,  63,  63,  70,
+			77,  77,  84,  91,  91,  98,  105, 105,
+			105, 105, 105, 105, 105, 105, 105, 105,
+			105, 105, 105, 105, 105, 105, 105, 105,
+			105, 105, 105, 105, 105, 112, 112, 112,
+			119, 126, 133, 140, 140, 140, 140, 147,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153,
+		},
+		{	/* Fourth byte table 66. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   6,   9,   12,  15,  18,
+			21,  24,  27,  30,  33,  36,  39,  42,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,
+		},
+		{	/* Fourth byte table 67. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			144, 147, 150, 153, 156, 159, 162, 165,
+			168, 171, 174, 177, 180, 183, 186, 189,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192,
+		},
+		{	/* Fourth byte table 68. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			45,  45,  45,  48,  51,  54,  57,  60,
+			63,  66,  69,  72,  75,  78,  81,  84,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,
+		},
+		{	/* Fourth byte table 69. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   5,   10,  15,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  22,  24,  26,  28,  30,  32,
+			34,  36,  38,  40,  42,  44,  46,  48,
+			50,  53,  56,  59,  62,  65,  68,  71,
+			74,  77,  80,  83,  86,  89,  92,  98,
+			104, 110, 116, 122, 128, 134, 140, 146,
+			152, 158, 164, 170, 176, 176, 176, 176,
+			176, 176, 176, 176, 176, 176, 176, 176,
+			176, 176, 176, 176, 176, 176, 176, 176,
+			176, 176, 176, 176, 176, 176, 176, 176,
+			176, 176, 176, 176, 176, 176, 176, 176,
+			176, 176, 176, 176, 176, 176, 176, 176,
+			176, 176, 176, 176, 176, 176, 176, 176,
+			176, 176, 176, 176, 176, 176, 176, 176,
+			176, 176, 176, 176, 176, 176, 176, 176,
+			176,
+		},
+		{	/* Fourth byte table 70. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			144, 147, 149, 151, 153, 155, 157, 159,
+			161, 163, 165, 167, 169, 171, 173, 175,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177,
+		},
+		{	/* Fourth byte table 71. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  41,  46,  51,  51,  51,  51,
+			51,  54,  57,  60,  63,  66,  69,  72,
+			75,  78,  81,  84,  87,  90,  93,  96,
+			99,  102, 105, 108, 111, 114, 117, 120,
+			123, 126, 129, 132, 135, 138, 141, 144,
+			147, 150, 153, 156, 159, 162, 165, 168,
+			171, 174, 177, 180, 183, 186, 189, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192,
+		},
+		{	/* Fourth byte table 72. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   7,   9,   11,  13,  15,
+			17,  20,  24,  26,  28,  31,  34,  36,
+			38,  40,  43,  46,  49,  52,  55,  57,
+			59,  61,  63,  65,  68,  70,  72,  74,
+			77,  80,  82,  85,  88,  91,  93,  96,
+			101, 107, 109, 112, 115, 118, 121, 128,
+			136, 138, 140, 143, 145, 147, 149, 152,
+			154, 156, 158, 160, 162, 165, 167, 169,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171,
+		},
+		{	/* Fourth byte table 73. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   10,  12,  14,  16,  22,
+			25,  27,  29,  31,  33,  35,  37,  39,
+			41,  43,  45,  48,  50,  52,  55,  58,
+			60,  64,  67,  69,  71,  73,  75,  75,
+			75,  79,  83,  87,  91,  95,  99,  103,
+			107, 111, 116, 121, 126, 131, 136, 141,
+			146, 151, 156, 161, 166, 171, 176, 181,
+			186, 191, 196, 201, 206, 211, 216, 221,
+			221, 221, 221, 221, 221, 221, 221, 221,
+			221, 221, 221, 221, 221, 221, 221, 221,
+			221, 221, 221, 221, 221, 221, 221, 221,
+			221, 221, 221, 221, 221, 221, 221, 221,
+			221, 221, 221, 221, 221, 221, 221, 221,
+			221, 221, 221, 221, 221, 221, 221, 221,
+			221, 221, 221, 221, 221, 221, 221, 221,
+			221, 221, 221, 221, 221, 221, 221, 221,
+			221,
+		},
+		{	/* Fourth byte table 74. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  56,
+			56,  60,  60,  64,  64,  64,  68,  72,
+			76,  80,  84,  88,  92,  96,  100, 104,
+			104, 108, 108, 112, 112, 112, 116, 120,
+			120, 120, 120, 124, 128, 132, 136, 136,
+			136, 140, 144, 148, 152, 156, 160, 164,
+			168, 172, 176, 180, 184, 188, 192, 196,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200,
+		},
+		{	/* Fourth byte table 75. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  68,  72,  76,  80,  84,  88,  92,
+			96,  100, 104, 108, 112, 116, 120, 124,
+			128, 132, 136, 140, 144, 148, 152, 156,
+			160, 164, 168, 172, 172, 172, 172, 172,
+			172, 172, 172, 172, 172, 172, 172, 172,
+			172, 172, 172, 172, 172, 172, 172, 172,
+			172, 172, 172, 172, 172, 172, 172, 172,
+			172, 172, 172, 172, 172, 172, 172, 172,
+			172, 172, 172, 172, 172, 172, 172, 172,
+			172, 172, 172, 172, 172, 172, 172, 172,
+			172, 172, 172, 172, 172, 172, 172, 172,
+			172, 172, 172, 172, 172, 172, 172, 172,
+			172, 172, 172, 172, 172, 172, 172, 172,
+			172, 172, 172, 172, 172, 172, 172, 172,
+			172,
+		},
+		{	/* Fourth byte table 76. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   9,   12,  14,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  20,  24,  28,  32,
+			36,  36,  36,  36,  36,  36,  41,  41,
+			46,  48,  50,  52,  54,  56,  58,  60,
+			62,  64,  65,  70,  75,  82,  89,  94,
+			99,  104, 109, 114, 119, 124, 129, 134,
+			134, 139, 144, 149, 154, 159, 159, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164,
+		},
+		{	/* Fourth byte table 77. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   5,   10,  10,  15,  20,  20,  25,
+			30,  35,  40,  45,  50,  55,  60,  65,
+			69,  71,  73,  75,  77,  79,  81,  83,
+			85,  87,  89,  91,  93,  95,  97,  99,
+			101, 103, 105, 107, 109, 111, 113, 115,
+			117, 119, 121, 123, 125, 127, 129, 131,
+			133, 135, 137, 139, 141, 143, 145, 147,
+			149, 151, 153, 155, 157, 159, 161, 163,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165,
+		},
+		{	/* Fourth byte table 78. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			48,  50,  52,  54,  56,  58,  60,  62,
+			64,  66,  68,  70,  72,  76,  80,  82,
+			84,  86,  88,  90,  92,  94,  96,  98,
+			100, 104, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108,
+		},
+		{	/* Fourth byte table 79. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   2,   4,   6,   8,
+			10,  12,  14,  16,  18,  20,  24,  26,
+			28,  30,  32,  34,  36,  38,  40,  42,
+			44,  46,  48,  54,  60,  66,  72,  78,
+			84,  90,  96,  102, 108, 114, 120, 126,
+			132, 138, 144, 150, 156, 158, 160, 162,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164,
+		},
+		{	/* Fourth byte table 80. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  68,  72,  76,  80,  84,  88,  92,
+			96,  100, 104, 108, 112, 116, 120, 124,
+			128, 132, 136, 140, 144, 148, 152, 156,
+			160, 164, 168, 172, 176, 180, 184, 188,
+			192, 196, 200, 204, 208, 212, 216, 220,
+			224, 228, 232, 236, 240, 244, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248,
+		},
+		{	/* Fourth byte table 81. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   6,   12,  18,  24,  30,  36,  42,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  54,  60,  68,  76,  84,  92,  100,
+			108, 116, 122, 155, 170, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178,
+		},
+		{	/* Fourth byte table 82. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   5,   8,   9,   10,  11,  12,
+			13,  14,  17,  20,  23,  26,  29,  32,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,
+		},
+		{	/* Fourth byte table 83. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  15,  15,
+			15,  15,  18,  21,  24,  27,  28,  29,
+			30,  31,  34,  35,  35,  36,  37,  38,
+			39,  42,  43,  44,  45,  46,  49,  52,
+			53,  54,  55,  56,  57,  58,  59,  60,
+			60,  61,  62,  63,  64,  64,  64,  64,
+			64,  67,  71,  74,  74,  77,  77,  80,
+			84,  87,  91,  94,  98,  101, 105, 108,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112,
+		},
+		{	/* Fourth byte table 84. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   6,   10,  14,  18,  22,  26,
+			30,  34,  38,  42,  46,  50,  52,  54,
+			56,  58,  60,  62,  64,  66,  68,  70,
+			72,  74,  76,  78,  80,  82,  84,  86,
+			88,  90,  92,  94,  96,  98,  100, 102,
+			104, 106, 108, 110, 112, 114, 116, 118,
+			120, 122, 124, 126, 128, 130, 132, 134,
+			136, 138, 140, 142, 144, 146, 148, 150,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152,
+		},
+		{	/* Fourth byte table 85. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			48,  50,  52,  54,  56,  58,  60,  62,
+			64,  66,  68,  70,  72,  74,  76,  78,
+			80,  82,  84,  86,  88,  90,  92,  94,
+			96,  98,  100, 102, 104, 106, 112, 118,
+			124, 130, 136, 142, 146, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150,
+		},
+		{	/* Fourth byte table 86. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   1,   2,   3,   4,   5,   6,
+			7,   8,   9,   10,  11,  12,  13,  14,
+			15,  16,  17,  18,  19,  20,  21,  22,
+			23,  24,  25,  26,  27,  28,  29,  30,
+			31,  32,  33,  34,  35,  36,  37,  38,
+			39,  40,  41,  42,  43,  44,  45,  46,
+			47,  48,  49,  50,  51,  52,  53,  54,
+			55,  56,  57,  58,  59,  60,  61,  62,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,
+		},
+		{	/* Fourth byte table 87. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			34,  37,  40,  43,  46,  49,  52,  55,
+			58,  61,  64,  67,  70,  73,  76,  79,
+			82,  85,  88,  91,  94,  97,  100, 103,
+			106, 109, 112, 115, 118, 121, 124, 127,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130,
+		},
+		{	/* Fourth byte table 88. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			144, 147, 150, 153, 156, 159, 162, 165,
+			168, 171, 174, 177, 180, 183, 186, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189,
+		},
+		{	/* Fourth byte table 89. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   3,   6,   9,   12,  15,
+			18,  18,  18,  21,  24,  27,  30,  33,
+			36,  36,  36,  39,  42,  45,  48,  51,
+			54,  54,  54,  57,  60,  63,  63,  63,
+			63,  65,  67,  69,  72,  74,  76,  79,
+			79,  82,  85,  88,  91,  94,  97,  100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100,
+		},
+		{	/* Fourth byte table 90. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   9,
+			18,  31,  44,  57,  70,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,
+		},
+		{	/* Fourth byte table 91. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   9,   18,  31,  44,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,
+		},
+		{	/* Fourth byte table 92. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,
+		},
+		{	/* Fourth byte table 93. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  37,  38,  39,
+			40,  41,  42,  43,  44,  45,  46,  47,
+			48,  49,  50,  51,  52,  53,  54,  55,
+			56,  57,  58,  59,  60,  61,  62,  63,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 94. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  21,  22,
+			23,  24,  25,  26,  27,  28,  29,  30,
+			31,  32,  33,  34,  35,  36,  37,  38,
+			39,  40,  41,  42,  43,  44,  45,  46,
+			47,  48,  49,  50,  51,  52,  53,  54,
+			55,  56,  57,  58,  59,  60,  61,  62,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,
+		},
+		{	/* Fourth byte table 95. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  29,  30,
+			31,  31,  31,  32,  32,  32,  33,  34,
+			34,  34,  35,  36,  37,  38,  38,  39,
+			40,  41,  42,  43,  44,  45,  46,  47,
+			48,  49,  50,  50,  51,  51,  52,  53,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,
+		},
+		{	/* Fourth byte table 96. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   1,   2,   3,   3,   4,   5,
+			6,   7,   8,   9,   10,  11,  12,  13,
+			14,  15,  16,  17,  18,  19,  20,  21,
+			22,  23,  24,  25,  26,  27,  28,  29,
+			30,  31,  32,  33,  34,  35,  36,  37,
+			38,  39,  40,  41,  42,  43,  44,  45,
+			46,  47,  48,  49,  50,  51,  52,  53,
+			54,  55,  56,  57,  58,  59,  60,  61,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,
+		},
+		{	/* Fourth byte table 97. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   6,
+			7,   8,   9,   10,  10,  10,  11,  12,
+			13,  14,  15,  16,  17,  18,  18,  19,
+			20,  21,  22,  23,  24,  25,  25,  26,
+			27,  28,  29,  30,  31,  32,  33,  34,
+			35,  36,  37,  38,  39,  40,  41,  42,
+			43,  44,  45,  46,  47,  48,  49,  50,
+			51,  52,  53,  53,  54,  55,  56,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,
+		},
+		{	/* Fourth byte table 98. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   5,   6,
+			6,   6,   6,   7,   8,   9,   10,  11,
+			12,  13,  13,  14,  15,  16,  17,  18,
+			19,  20,  21,  22,  23,  24,  25,  26,
+			27,  28,  29,  30,  31,  32,  33,  34,
+			35,  36,  37,  38,  39,  40,  41,  42,
+			43,  44,  45,  46,  47,  48,  49,  50,
+			51,  52,  53,  54,  55,  56,  57,  58,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,
+		},
+		{	/* Fourth byte table 99. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  37,  38,  39,
+			40,  41,  42,  43,  44,  45,  46,  47,
+			48,  49,  50,  51,  52,  53,  54,  55,
+			56,  57,  58,  59,  60,  61,  62,  63,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 100. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  37,  38,  39,
+			40,  41,  42,  43,  44,  45,  46,  47,
+			48,  49,  50,  51,  52,  53,  54,  55,
+			56,  57,  58,  59,  60,  61,  62,  63,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 101. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  37,  38,  39,
+			40,  41,  42,  43,  44,  45,  46,  47,
+			48,  49,  50,  51,  52,  53,  54,  55,
+			56,  57,  58,  59,  60,  61,  62,  63,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 102. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  37,  38,  39,
+			40,  41,  42,  43,  44,  45,  46,  47,
+			48,  49,  50,  51,  52,  53,  54,  55,
+			56,  57,  58,  59,  60,  61,  62,  63,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 103. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  36,  36,  36,
+			36,  38,  40,  42,  44,  46,  48,  50,
+			52,  54,  56,  58,  60,  62,  64,  66,
+			68,  70,  72,  74,  76,  78,  80,  82,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,
+		},
+		{	/* Fourth byte table 104. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   5,   7,   9,   11,  13,  15,
+			17,  19,  21,  23,  25,  27,  29,  31,
+			33,  35,  37,  39,  41,  43,  45,  47,
+			49,  51,  53,  55,  58,  60,  62,  64,
+			66,  68,  70,  72,  74,  76,  78,  80,
+			82,  84,  86,  88,  90,  92,  94,  96,
+			98,  100, 102, 104, 106, 108, 110, 112,
+			114, 116, 118, 120, 123, 125, 127, 129,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131,
+		},
+		{	/* Fourth byte table 105. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  45,  47,
+			49,  51,  53,  55,  57,  59,  61,  63,
+			65,  67,  69,  71,  73,  75,  77,  79,
+			81,  83,  85,  87,  89,  91,  93,  95,
+			97,  99,  101, 103, 105, 107, 110, 112,
+			114, 116, 118, 120, 122, 124, 126, 128,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130,
+		},
+		{	/* Fourth byte table 106. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			33,  35,  37,  39,  41,  43,  45,  47,
+			49,  51,  53,  55,  57,  59,  61,  63,
+			65,  67,  69,  71,  73,  75,  77,  79,
+			81,  83,  85,  87,  89,  91,  93,  95,
+			98,  100, 102, 104, 106, 108, 110, 112,
+			114, 116, 118, 120, 122, 124, 126, 128,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130,
+		},
+		{	/* Fourth byte table 107. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  21,  23,  25,  27,  29,  31,
+			33,  35,  37,  39,  41,  43,  45,  47,
+			49,  51,  53,  55,  57,  59,  61,  63,
+			65,  67,  69,  71,  73,  75,  77,  79,
+			81,  83,  86,  88,  90,  92,  94,  96,
+			98,  100, 102, 104, 106, 108, 110, 112,
+			114, 116, 118, 120, 122, 124, 126, 128,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130,
+		},
+		{	/* Fourth byte table 108. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   9,   11,  13,  15,
+			17,  19,  21,  21,  21,  21,  21,  22,
+			23,  24,  25,  26,  27,  28,  29,  30,
+			31,  32,  33,  34,  35,  36,  37,  38,
+			39,  40,  41,  42,  43,  44,  45,  46,
+			47,  48,  49,  50,  51,  52,  53,  54,
+			55,  56,  57,  58,  59,  60,  61,  62,
+			63,  64,  65,  66,  67,  68,  69,  70,
+			71,  71,  71,  71,  71,  71,  71,  71,
+			71,  71,  71,  71,  71,  71,  71,  71,
+			71,  71,  71,  71,  71,  71,  71,  71,
+			71,  71,  71,  71,  71,  71,  71,  71,
+			71,  71,  71,  71,  71,  71,  71,  71,
+			71,  71,  71,  71,  71,  71,  71,  71,
+			71,  71,  71,  71,  71,  71,  71,  71,
+			71,  71,  71,  71,  71,  71,  71,  71,
+			71,
+		},
+		{	/* Fourth byte table 109. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   9,   13,  17,  21,  25,  29,
+			33,  37,  42,  46,  50,  54,  58,  62,
+			66,  71,  75,  80,  85,  90,  94,  98,
+			102, 106, 110, 114, 118, 122, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127,
+		},
+		{	/* Fourth byte table 110. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 111. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 112. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 113. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 114. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 115. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 116. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 117. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+	},
+	{
+		{	/* Fourth byte table 0. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   1,   1,   1,   1,   1,   1,
+			1,   4,   4,   5,   5,   5,   5,   5,
+			8,   8,   8,   9,   10,  13,  15,  15,
+			15,  18,  19,  20,  20,  25,  30,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,
+		},
+		{	/* Fourth byte table 1. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  24,
+			28,  32,  36,  40,  44,  48,  52,  56,
+			60,  60,  64,  68,  72,  76,  80,  84,
+			84,  84,  88,  92,  96,  100, 104, 104,
+			104, 108, 112, 116, 120, 124, 128, 128,
+			132, 136, 140, 144, 148, 152, 156, 160,
+			164, 164, 168, 172, 176, 180, 184, 188,
+			188, 188, 192, 196, 200, 204, 208, 208,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212,
+		},
+		{	/* Fourth byte table 2. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  64,  64,  68,  72,  76,  80,  84,
+			88,  92,  96,  100, 104, 108, 112, 116,
+			120, 124, 128, 132, 136, 140, 144, 144,
+			144, 148, 152, 156, 160, 164, 168, 172,
+			176, 180, 180, 182, 184, 188, 192, 196,
+			200, 200, 204, 208, 212, 216, 220, 224,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227, 227, 227, 227, 227, 227, 227, 227,
+			227,
+		},
+		{	/* Fourth byte table 3. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   3,   7,   11,  15,  19,
+			23,  27,  30,  30,  30,  34,  38,  42,
+			46,  50,  54,  54,  54,  58,  62,  66,
+			70,  74,  78,  82,  86,  90,  94,  98,
+			102, 106, 110, 114, 118, 122, 126, 126,
+			126, 130, 134, 138, 142, 146, 150, 154,
+			158, 162, 166, 170, 174, 178, 182, 186,
+			190, 194, 198, 202, 206, 210, 214, 218,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219, 219, 219, 219, 219, 219, 219, 219,
+			219,
+		},
+		{	/* Fourth byte table 4. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			12,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,
+		},
+		{	/* Fourth byte table 5. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   4,   8,   12,
+			14,  16,  18,  20,  22,  24,  28,  32,
+			36,  40,  44,  48,  52,  56,  62,  68,
+			74,  80,  86,  92,  98,  104, 104, 110,
+			116, 122, 128, 133, 138, 138, 138, 142,
+			146, 150, 154, 158, 162, 168, 174, 179,
+			184, 188, 190, 192, 194, 198, 202, 202,
+			202, 206, 210, 216, 222, 227, 232, 237,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242, 242, 242, 242, 242, 242, 242, 242,
+			242,
+		},
+		{	/* Fourth byte table 6. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  68,  72,  76,  80,  84,  88,  92,
+			96,  100, 104, 108, 112, 112, 112, 116,
+			120, 120, 120, 120, 120, 120, 120, 124,
+			128, 132, 136, 142, 148, 154, 160, 164,
+			168, 174, 180, 184, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188, 188, 188, 188, 188, 188, 188, 188,
+			188,
+		},
+		{	/* Fourth byte table 7. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   3,   4,   5,   7,   9,   11,
+			12,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,
+		},
+		{	/* Fourth byte table 8. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  18,
+			18,  20,  21,  22,  23,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,
+		},
+		{	/* Fourth byte table 9. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   6,   9,   14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  17,  17,  17,
+			17,  17,  17,  20,  20,  20,  20,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,
+		},
+		{	/* Fourth byte table 10. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   3,   14,  19,
+			22,  27,  32,  37,  37,  42,  42,  47,
+			52,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  64,  69,  74,  79,  84,
+			89,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 11. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   5,   10,  15,  20,  25,
+			25,  27,  29,  31,  41,  51,  53,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  57,  59,  61,  61,  63,  65,  65,
+			65,  65,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,  67,  67,  67,  67,  67,  67,  67,
+			67,
+		},
+		{	/* Fourth byte table 12. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   5,   10,  10,  15,  15,  15,  15,
+			20,  20,  20,  20,  20,  25,  30,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  40,  40,  40,  40,  40,  40,
+			40,  40,  40,  40,  40,  40,  40,  40,
+			40,  40,  40,  40,  40,  40,  40,  40,
+			40,  40,  40,  40,  40,  40,  40,  40,
+			40,  40,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,
+		},
+		{	/* Fourth byte table 13. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   5,   10,  10,  15,  15,  15,  15,
+			20,  20,  20,  20,  20,  25,  30,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  40,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,
+		},
+		{	/* Fourth byte table 14. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   5,   10,  10,  10,  10,  10,
+			10,  10,  10,  10,  10,  10,  10,  10,
+			10,  15,  20,  25,  30,  30,  30,  35,
+			40,  40,  40,  45,  50,  55,  60,  65,
+			70,  70,  70,  75,  80,  85,  90,  95,
+			100, 100, 100, 105, 110, 115, 120, 125,
+			130, 135, 140, 145, 150, 155, 160, 160,
+			160, 165, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170, 170, 170, 170, 170, 170, 170, 170,
+			170,
+		},
+		{	/* Fourth byte table 15. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,   4,   4,   4,   4,   4,   4,   4,
+			4,
+		},
+		{	/* Fourth byte table 16. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   5,   10,  15,  20,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,
+		},
+		{	/* Fourth byte table 17. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   4,   8,
+			12,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,
+		},
+		{	/* Fourth byte table 18. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   5,   5,   10,  10,  10,  10,  10,
+			10,  10,  10,  10,  10,  10,  10,  10,
+			10,  10,  10,  10,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,
+		},
+		{	/* Fourth byte table 19. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   7,   7,   7,   7,   7,   7,
+			7,   7,   14,  14,  14,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 20. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   14,  21,  28,  35,  42,  49,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,
+		},
+		{	/* Fourth byte table 21. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  21,  28,  28,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,
+		},
+		{	/* Fourth byte table 22. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   7,   7,   14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,
+		},
+		{	/* Fourth byte table 23. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   7,   14,  21,  21,  21,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,
+		},
+		{	/* Fourth byte table 24. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   7,   7,   14,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  28,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,
+		},
+		{	/* Fourth byte table 25. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,
+		},
+		{	/* Fourth byte table 26. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   7,   14,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 27. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,
+		},
+		{	/* Fourth byte table 28. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   7,   7,   7,   7,   7,   7,
+			14,  21,  21,  28,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,
+		},
+		{	/* Fourth byte table 29. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   7,   14,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 30. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   7,   7,   14,  24,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,  31,  31,  31,  31,  31,  31,  31,
+			31,
+		},
+		{	/* Fourth byte table 31. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,
+		},
+		{	/* Fourth byte table 32. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,
+		},
+		{	/* Fourth byte table 33. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   6,   12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,
+		},
+		{	/* Fourth byte table 34. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,
+		},
+		{	/* Fourth byte table 35. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   14,  14,
+			14,  14,  14,  21,  21,  21,  21,  21,
+			28,  28,  28,  28,  28,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  49,  49,  56,  63,
+			72,  79,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,
+		},
+		{	/* Fourth byte table 36. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  21,  21,
+			21,  21,  21,  28,  28,  28,  28,  28,
+			35,  35,  35,  35,  35,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,  49,  49,  49,  49,  49,  49,  49,
+			49,
+		},
+		{	/* Fourth byte table 37. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,   7,   7,   7,   7,   7,   7,   7,
+			7,
+		},
+		{	/* Fourth byte table 38. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,
+		},
+		{	/* Fourth byte table 39. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   7,
+			7,   14,  14,  21,  21,  28,  28,  35,
+			35,  35,  35,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  49,  49,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,
+		},
+		{	/* Fourth byte table 40. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   14,  14,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 41. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   1,   3,   4,
+			4,   5,   6,   8,   9,   10,  11,  12,
+			13,  14,  15,  16,  16,  17,  19,  20,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 42. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   6,   8,   11,
+			12,  13,  14,  16,  18,  20,  21,  21,
+			22,  23,  25,  26,  28,  31,  34,  35,
+			36,  37,  40,  42,  43,  46,  48,  50,
+			52,  54,  56,  57,  58,  59,  60,  62,
+			64,  66,  68,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,
+		},
+		{	/* Fourth byte table 43. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   2,   3,   5,   7,
+			9,   10,  12,  14,  16,  18,  20,  22,
+			25,  27,  29,  32,  34,  36,  38,  40,
+			42,  44,  46,  48,  50,  52,  54,  56,
+			58,  61,  63,  65,  66,  68,  70,  72,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,
+		},
+		{	/* Fourth byte table 44. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   6,   12,  13,  14,  15,  16,  17,
+			18,  19,  20,  21,  21,  21,  21,  21,
+			21,  21,  24,  24,  24,  24,  24,  24,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  28,  30,  33,
+			33,  33,  33,  33,  33,  33,  33,  33,
+			34,  34,  34,  34,  40,  49,  49,  55,
+			64,  64,  64,  64,  64,  66,  66,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,  69,  69,  69,  69,  69,  69,  69,
+			69,
+		},
+		{	/* Fourth byte table 45. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			2,   4,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  19,  19,
+			19,  20,  21,  21,  21,  22,  23,  24,
+			25,  26,  27,  28,  31,  32,  33,  34,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,  35,  35,  35,  35,  35,  35,  35,
+			35,
+		},
+		{	/* Fourth byte table 46. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  14,  15,  16,  17,
+			17,  18,  19,  20,  21,  23,  23,  23,
+			23,  23,  23,  23,  23,  23,  23,  23,
+			23,  23,  23,  23,  23,  23,  23,  23,
+			23,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,  25,  25,  25,  25,  25,  25,  25,
+			25,
+		},
+		{	/* Fourth byte table 47. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   7,   10,  10,  13,  16,
+			18,  18,  21,  22,  23,  24,  25,  26,
+			28,  29,  30,  31,  32,  32,  33,  35,
+			35,  35,  36,  37,  38,  39,  40,  40,
+			40,  42,  45,  47,  47,  48,  48,  51,
+			51,  52,  52,  54,  58,  59,  60,  60,
+			61,  62,  63,  63,  64,  65,  67,  69,
+			71,  73,  74,  74,  77,  79,  81,  83,
+			85,  85,  85,  85,  85,  85,  85,  85,
+			85,  85,  85,  85,  85,  85,  85,  85,
+			85,  85,  85,  85,  85,  85,  85,  85,
+			85,  85,  85,  85,  85,  85,  85,  85,
+			85,  85,  85,  85,  85,  85,  85,  85,
+			85,  85,  85,  85,  85,  85,  85,  85,
+			85,  85,  85,  85,  85,  85,  85,  85,
+			85,  85,  85,  85,  85,  85,  85,  85,
+			85,
+		},
+		{	/* Fourth byte table 48. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   3,   3,   3,   4,   5,
+			6,   7,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   13,  18,  23,  28,
+			33,  38,  43,  48,  53,  58,  63,  68,
+			72,  73,  75,  78,  80,  81,  83,  86,
+			90,  92,  93,  95,  98,  99,  100, 101,
+			102, 103, 105, 108, 110, 111, 113, 116,
+			120, 122, 123, 125, 128, 129, 130, 131,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132, 132, 132, 132, 132, 132, 132, 132,
+			132,
+		},
+		{	/* Fourth byte table 49. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   6,   12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,
+		},
+		{	/* Fourth byte table 50. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   6,   12,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,
+		},
+		{	/* Fourth byte table 51. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   6,   6,   6,
+			6,   6,   12,  12,  12,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  24,  24,  30,
+			30,  30,  30,  30,  30,  36,  45,  45,
+			51,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,
+		},
+		{	/* Fourth byte table 52. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   6,   6,   6,   12,  12,  12,
+			18,  18,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  28,  28,  34,  34,  34,  34,  34,
+			34,  34,  34,  34,  34,  34,  40,  44,
+			48,  54,  60,  60,  60,  66,  72,  72,
+			72,  78,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,
+		},
+		{	/* Fourth byte table 53. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   6,   12,  12,  12,  18,  24,  24,
+			24,  30,  36,  36,  36,  36,  36,  36,
+			36,  36,  36,  36,  36,  36,  36,  36,
+			36,  36,  36,  36,  36,  36,  36,  36,
+			36,  36,  36,  36,  36,  36,  36,  36,
+			36,  36,  36,  36,  36,  42,  48,  54,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,
+		},
+		{	/* Fourth byte table 54. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   6,   12,  18,  24,  24,  24,  24,
+			24,  24,  24,  30,  36,  42,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,
+		},
+		{	/* Fourth byte table 55. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   4,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,
+		},
+		{	/* Fourth byte table 56. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   11,  13,  15,  17,  19,  21,
+			23,  25,  27,  29,  31,  34,  37,  40,
+			43,  46,  49,  52,  55,  58,  62,  66,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,
+		},
+		{	/* Fourth byte table 57. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			48,  50,  53,  56,  59,  62,  65,  68,
+			71,  74,  77,  80,  83,  86,  89,  92,
+			95,  98,  101, 104, 107, 110, 113, 116,
+			119, 122, 125, 128, 131, 134, 137, 140,
+			143, 146, 149, 152, 155, 158, 161, 162,
+			163, 164, 165, 166, 167, 168, 169, 170,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171,
+		},
+		{	/* Fourth byte table 58. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  37,  38,  39,
+			40,  41,  42,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,  43,  43,  43,  43,  43,  43,  43,
+			43,
+		},
+		{	/* Fourth byte table 59. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,
+		},
+		{	/* Fourth byte table 60. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   3,   5,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,
+		},
+		{	/* Fourth byte table 61. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,   6,   6,   6,   6,   6,   6,   6,
+			6,
+		},
+		{	/* Fourth byte table 62. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,
+		},
+		{	/* Fourth byte table 63. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,
+		},
+		{	/* Fourth byte table 64. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,
+		},
+		{	/* Fourth byte table 65. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			144, 147, 150, 153, 156, 159, 162, 165,
+			168, 171, 174, 177, 180, 183, 186, 189,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192,
+		},
+		{	/* Fourth byte table 66. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			144, 147, 150, 153, 156, 159, 162, 165,
+			168, 171, 174, 177, 180, 183, 186, 189,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192,
+		},
+		{	/* Fourth byte table 67. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			144, 147, 150, 153, 156, 159, 162, 165,
+			168, 171, 174, 177, 180, 183, 186, 189,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192,
+		},
+		{	/* Fourth byte table 68. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,
+		},
+		{	/* Fourth byte table 69. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   1,   1,   1,   1,   1,   1,
+			1,   1,   1,   1,   1,   1,   1,   1,
+			1,   1,   1,   1,   1,   1,   1,   1,
+			1,   1,   1,   1,   1,   1,   1,   1,
+			1,   1,   1,   1,   1,   1,   1,   1,
+			1,   1,   1,   1,   1,   1,   1,   1,
+			1,   1,   1,   1,   1,   1,   1,   4,
+			4,   7,   10,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,
+		},
+		{	/* Fourth byte table 70. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   7,   7,   14,
+			14,  21,  21,  28,  28,  35,  35,  42,
+			42,  49,  49,  56,  56,  63,  63,  70,
+			70,  77,  77,  84,  84,  84,  91,  91,
+			98,  98,  105, 105, 105, 105, 105, 105,
+			105, 112, 119, 119, 126, 133, 133, 140,
+			147, 147, 154, 161, 161, 168, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175, 175, 175, 175, 175, 175, 175, 175,
+			175,
+		},
+		{	/* Fourth byte table 71. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   7,   7,   7,
+			7,   7,   7,   7,   11,  15,  15,  22,
+			28,  28,  28,  28,  28,  28,  28,  28,
+			28,  28,  28,  28,  28,  35,  35,  42,
+			42,  49,  49,  56,  56,  63,  63,  70,
+			70,  77,  77,  84,  84,  91,  91,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,  98,  98,  98,  98,  98,  98,  98,
+			98,
+		},
+		{	/* Fourth byte table 72. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   7,   7,   14,  14,  14,  21,  21,
+			28,  28,  35,  35,  35,  35,  35,  35,
+			35,  42,  49,  49,  56,  63,  63,  70,
+			77,  77,  84,  91,  91,  98,  105, 105,
+			105, 105, 105, 105, 105, 105, 105, 105,
+			105, 105, 105, 105, 105, 105, 105, 105,
+			105, 105, 105, 105, 105, 112, 112, 112,
+			119, 126, 133, 140, 140, 140, 140, 147,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153, 153, 153, 153, 153, 153, 153, 153,
+			153,
+		},
+		{	/* Fourth byte table 73. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   6,   9,   12,  15,  18,
+			21,  24,  27,  30,  33,  36,  39,  42,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,  45,  45,  45,  45,  45,  45,  45,
+			45,
+		},
+		{	/* Fourth byte table 74. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			144, 147, 150, 153, 156, 159, 162, 165,
+			168, 171, 174, 177, 180, 183, 186, 189,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192, 192, 192, 192, 192, 192, 192, 192,
+			192,
+		},
+		{	/* Fourth byte table 75. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			45,  45,  45,  48,  51,  54,  57,  60,
+			63,  66,  69,  72,  75,  78,  81,  84,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,
+		},
+		{	/* Fourth byte table 76. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   5,   10,  15,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  23,  25,  27,  29,  31,  33,  35,
+			37,  39,  41,  43,  45,  47,  49,  51,
+			53,  56,  59,  62,  65,  68,  71,  74,
+			77,  80,  83,  86,  89,  92,  95,  101,
+			107, 113, 119, 125, 131, 137, 143, 149,
+			155, 161, 167, 173, 179, 194, 206, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212, 212, 212, 212, 212, 212, 212, 212,
+			212,
+		},
+		{	/* Fourth byte table 77. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			144, 147, 149, 151, 153, 155, 157, 159,
+			161, 163, 165, 167, 169, 171, 173, 175,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177, 177, 177, 177, 177, 177, 177, 177,
+			177,
+		},
+		{	/* Fourth byte table 78. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  41,  46,  51,  53,  56,  58,
+			61,  64,  67,  70,  73,  76,  79,  82,
+			85,  88,  91,  94,  97,  100, 103, 106,
+			109, 112, 115, 118, 121, 124, 127, 130,
+			133, 136, 139, 142, 145, 148, 151, 154,
+			157, 160, 163, 166, 169, 172, 175, 178,
+			181, 184, 187, 190, 193, 196, 199, 202,
+			202, 202, 202, 202, 202, 202, 202, 202,
+			202, 202, 202, 202, 202, 202, 202, 202,
+			202, 202, 202, 202, 202, 202, 202, 202,
+			202, 202, 202, 202, 202, 202, 202, 202,
+			202, 202, 202, 202, 202, 202, 202, 202,
+			202, 202, 202, 202, 202, 202, 202, 202,
+			202, 202, 202, 202, 202, 202, 202, 202,
+			202, 202, 202, 202, 202, 202, 202, 202,
+			202,
+		},
+		{	/* Fourth byte table 79. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   7,   9,   11,  13,  15,
+			17,  20,  24,  26,  28,  31,  34,  36,
+			38,  40,  43,  46,  49,  52,  55,  57,
+			59,  61,  63,  65,  68,  70,  72,  74,
+			77,  80,  82,  85,  88,  91,  93,  96,
+			101, 107, 109, 112, 115, 118, 121, 128,
+			136, 138, 140, 143, 145, 147, 149, 152,
+			154, 156, 158, 160, 162, 165, 167, 169,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171, 171, 171, 171, 171, 171, 171, 171,
+			171,
+		},
+		{	/* Fourth byte table 80. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   10,  12,  14,  16,  22,
+			25,  27,  29,  31,  33,  35,  37,  39,
+			41,  43,  45,  48,  50,  52,  55,  58,
+			60,  64,  67,  69,  71,  73,  75,  80,
+			85,  89,  93,  97,  101, 105, 109, 113,
+			117, 121, 126, 131, 136, 141, 146, 151,
+			156, 161, 166, 171, 176, 181, 186, 191,
+			196, 201, 206, 211, 216, 221, 226, 231,
+			234, 234, 234, 234, 234, 234, 234, 234,
+			234, 234, 234, 234, 234, 234, 234, 234,
+			234, 234, 234, 234, 234, 234, 234, 234,
+			234, 234, 234, 234, 234, 234, 234, 234,
+			234, 234, 234, 234, 234, 234, 234, 234,
+			234, 234, 234, 234, 234, 234, 234, 234,
+			234, 234, 234, 234, 234, 234, 234, 234,
+			234, 234, 234, 234, 234, 234, 234, 234,
+			234,
+		},
+		{	/* Fourth byte table 81. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  56,
+			56,  60,  60,  64,  64,  64,  68,  72,
+			76,  80,  84,  88,  92,  96,  100, 104,
+			104, 108, 108, 112, 112, 112, 116, 120,
+			120, 120, 120, 124, 128, 132, 136, 136,
+			136, 140, 144, 148, 152, 156, 160, 164,
+			168, 172, 176, 180, 184, 188, 192, 196,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200, 200, 200, 200, 200, 200, 200, 200,
+			200,
+		},
+		{	/* Fourth byte table 82. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  68,  72,  76,  80,  84,  88,  92,
+			96,  100, 104, 108, 112, 116, 120, 124,
+			128, 132, 136, 140, 144, 148, 152, 156,
+			160, 164, 168, 172, 172, 172, 172, 172,
+			172, 176, 180, 184, 188, 192, 196, 200,
+			204, 208, 212, 216, 220, 224, 228, 232,
+			236, 236, 236, 236, 236, 236, 236, 236,
+			236, 236, 236, 236, 236, 236, 236, 236,
+			236, 236, 236, 236, 236, 236, 236, 236,
+			236, 236, 236, 236, 236, 236, 236, 236,
+			236, 236, 236, 236, 236, 236, 236, 236,
+			236, 236, 236, 236, 236, 236, 236, 236,
+			236, 236, 236, 236, 236, 236, 236, 236,
+			236, 236, 236, 236, 236, 236, 236, 236,
+			236,
+		},
+		{	/* Fourth byte table 83. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			65,  70,  75,  79,  83,  87,  92,  97,
+			102, 106, 110, 110, 110, 110, 110, 110,
+			110, 110, 110, 110, 110, 110, 110, 110,
+			110, 110, 110, 110, 110, 110, 110, 110,
+			110, 110, 110, 110, 110, 110, 110, 110,
+			110, 110, 110, 110, 110, 110, 110, 110,
+			110, 110, 110, 110, 110, 110, 110, 110,
+			110, 110, 110, 110, 110, 110, 110, 110,
+			110, 110, 110, 110, 110, 110, 110, 110,
+			110, 110, 110, 110, 110, 110, 110, 110,
+			110, 110, 110, 110, 110, 110, 110, 110,
+			110, 110, 110, 110, 110, 110, 110, 110,
+			110, 110, 110, 110, 110, 110, 110, 110,
+			110, 110, 110, 110, 110, 110, 110, 110,
+			110,
+		},
+		{	/* Fourth byte table 84. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   9,   12,  14,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  20,  24,  28,  32,
+			36,  36,  36,  36,  36,  36,  41,  41,
+			46,  48,  50,  52,  54,  56,  58,  60,
+			62,  64,  65,  70,  75,  82,  89,  94,
+			99,  104, 109, 114, 119, 124, 129, 134,
+			134, 139, 144, 149, 154, 159, 159, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164,
+		},
+		{	/* Fourth byte table 85. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   5,   10,  10,  15,  20,  20,  25,
+			30,  35,  40,  45,  50,  55,  60,  65,
+			69,  71,  73,  75,  77,  79,  81,  83,
+			85,  87,  89,  91,  93,  95,  97,  99,
+			101, 103, 105, 107, 109, 111, 113, 115,
+			117, 119, 121, 123, 125, 127, 129, 131,
+			133, 135, 137, 139, 141, 143, 145, 147,
+			149, 151, 153, 155, 157, 159, 161, 163,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165, 165, 165, 165, 165, 165, 165, 165,
+			165,
+		},
+		{	/* Fourth byte table 86. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			48,  50,  52,  54,  56,  58,  60,  62,
+			64,  66,  68,  70,  72,  76,  80,  82,
+			84,  86,  88,  90,  92,  94,  96,  98,
+			100, 104, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108, 108, 108, 108, 108, 108, 108, 108,
+			108,
+		},
+		{	/* Fourth byte table 87. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   2,   4,   6,   8,
+			10,  12,  14,  16,  18,  20,  24,  26,
+			28,  30,  32,  34,  36,  38,  40,  42,
+			44,  46,  48,  54,  60,  66,  72,  78,
+			84,  90,  96,  102, 108, 114, 120, 126,
+			132, 138, 144, 150, 156, 158, 160, 162,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164, 164, 164, 164, 164, 164, 164, 164,
+			164,
+		},
+		{	/* Fourth byte table 88. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  68,  72,  76,  80,  84,  88,  92,
+			96,  100, 104, 108, 112, 116, 120, 124,
+			128, 132, 136, 140, 144, 148, 152, 156,
+			160, 164, 168, 172, 176, 180, 184, 188,
+			192, 196, 200, 204, 208, 212, 216, 220,
+			224, 228, 232, 236, 240, 244, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248, 248, 248, 248, 248, 248, 248, 248,
+			248,
+		},
+		{	/* Fourth byte table 89. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   6,   12,  18,  24,  30,  36,  42,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  54,  60,  68,  76,  84,  92,  100,
+			108, 116, 122, 155, 170, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178, 178, 178, 178, 178, 178, 178, 178,
+			178,
+		},
+		{	/* Fourth byte table 90. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   4,   7,   8,   9,   10,  11,
+			14,  17,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  22,  25,  28,  29,  30,  31,  32,
+			33,  34,  37,  40,  43,  46,  49,  52,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,  55,  55,  55,  55,  55,  55,  55,
+			55,
+		},
+		{	/* Fourth byte table 91. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  15,  15,
+			16,  17,  20,  23,  26,  29,  30,  31,
+			32,  33,  36,  37,  37,  38,  39,  40,
+			41,  44,  45,  46,  47,  48,  51,  54,
+			55,  56,  57,  58,  59,  60,  61,  62,
+			62,  63,  64,  65,  66,  66,  66,  66,
+			66,  69,  73,  76,  76,  79,  79,  82,
+			86,  89,  93,  96,  100, 103, 107, 110,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114,
+		},
+		{	/* Fourth byte table 92. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   6,   10,  14,  18,  22,  26,
+			30,  34,  38,  42,  46,  50,  52,  54,
+			56,  58,  60,  62,  64,  66,  68,  70,
+			72,  74,  76,  78,  80,  82,  84,  86,
+			88,  90,  92,  94,  96,  98,  100, 102,
+			104, 106, 108, 110, 112, 114, 116, 118,
+			120, 122, 124, 126, 128, 130, 132, 134,
+			136, 138, 140, 142, 144, 146, 148, 150,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152,
+		},
+		{	/* Fourth byte table 93. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			48,  50,  52,  54,  56,  58,  60,  62,
+			64,  66,  68,  70,  72,  74,  76,  78,
+			80,  82,  84,  86,  88,  90,  92,  94,
+			96,  98,  100, 102, 104, 106, 112, 118,
+			124, 130, 136, 142, 146, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150, 150, 150, 150, 150, 150, 150, 150,
+			150,
+		},
+		{	/* Fourth byte table 94. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   1,   2,   3,   4,   5,   6,
+			7,   8,   9,   10,  11,  12,  13,  14,
+			15,  16,  17,  18,  19,  20,  21,  22,
+			23,  24,  25,  26,  27,  28,  29,  30,
+			31,  32,  33,  34,  35,  36,  37,  38,
+			39,  40,  41,  42,  43,  44,  45,  46,
+			47,  48,  49,  50,  51,  52,  53,  54,
+			55,  56,  57,  58,  59,  60,  61,  62,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,
+		},
+		{	/* Fourth byte table 95. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			34,  37,  40,  43,  46,  49,  52,  55,
+			58,  61,  64,  67,  70,  73,  76,  79,
+			82,  85,  88,  91,  94,  97,  100, 103,
+			106, 109, 112, 115, 118, 121, 124, 127,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130,
+		},
+		{	/* Fourth byte table 96. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			144, 147, 150, 153, 156, 159, 162, 165,
+			168, 171, 174, 177, 180, 183, 186, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189, 189, 189, 189, 189, 189, 189, 189,
+			189,
+		},
+		{	/* Fourth byte table 97. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   3,   6,   9,   12,  15,
+			18,  18,  18,  21,  24,  27,  30,  33,
+			36,  36,  36,  39,  42,  45,  48,  51,
+			54,  54,  54,  57,  60,  63,  63,  63,
+			63,  65,  67,  69,  72,  74,  76,  79,
+			79,  82,  85,  88,  91,  94,  97,  100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100, 100, 100, 100, 100, 100, 100, 100,
+			100,
+		},
+		{	/* Fourth byte table 98. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   9,
+			18,  31,  44,  57,  70,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,
+		},
+		{	/* Fourth byte table 99. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   9,   18,  31,  44,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,
+		},
+		{	/* Fourth byte table 100. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,  13,  13,  13,  13,  13,  13,  13,
+			13,
+		},
+		{	/* Fourth byte table 101. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  37,  38,  39,
+			40,  41,  42,  43,  44,  45,  46,  47,
+			48,  49,  50,  51,  52,  53,  54,  55,
+			56,  57,  58,  59,  60,  61,  62,  63,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 102. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  21,  22,
+			23,  24,  25,  26,  27,  28,  29,  30,
+			31,  32,  33,  34,  35,  36,  37,  38,
+			39,  40,  41,  42,  43,  44,  45,  46,
+			47,  48,  49,  50,  51,  52,  53,  54,
+			55,  56,  57,  58,  59,  60,  61,  62,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,
+		},
+		{	/* Fourth byte table 103. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  29,  30,
+			31,  31,  31,  32,  32,  32,  33,  34,
+			34,  34,  35,  36,  37,  38,  38,  39,
+			40,  41,  42,  43,  44,  45,  46,  47,
+			48,  49,  50,  50,  51,  51,  52,  53,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,
+		},
+		{	/* Fourth byte table 104. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   4,   5,   6,
+			7,   8,   9,   10,  11,  12,  13,  14,
+			15,  16,  17,  18,  19,  20,  21,  22,
+			23,  24,  25,  26,  27,  28,  29,  30,
+			31,  32,  33,  34,  35,  36,  37,  38,
+			39,  40,  41,  42,  43,  44,  45,  46,
+			47,  48,  49,  50,  51,  52,  53,  54,
+			55,  56,  57,  58,  59,  60,  61,  62,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,
+		},
+		{	/* Fourth byte table 105. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   6,
+			7,   8,   9,   10,  10,  10,  11,  12,
+			13,  14,  15,  16,  17,  18,  18,  19,
+			20,  21,  22,  23,  24,  25,  25,  26,
+			27,  28,  29,  30,  31,  32,  33,  34,
+			35,  36,  37,  38,  39,  40,  41,  42,
+			43,  44,  45,  46,  47,  48,  49,  50,
+			51,  52,  53,  53,  54,  55,  56,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,
+		},
+		{	/* Fourth byte table 106. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   5,   6,
+			6,   6,   6,   7,   8,   9,   10,  11,
+			12,  13,  13,  14,  15,  16,  17,  18,
+			19,  20,  21,  22,  23,  24,  25,  26,
+			27,  28,  29,  30,  31,  32,  33,  34,
+			35,  36,  37,  38,  39,  40,  41,  42,
+			43,  44,  45,  46,  47,  48,  49,  50,
+			51,  52,  53,  54,  55,  56,  57,  58,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,  59,  59,  59,  59,  59,  59,  59,
+			59,
+		},
+		{	/* Fourth byte table 107. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  37,  38,  39,
+			40,  41,  42,  43,  44,  45,  46,  47,
+			48,  49,  50,  51,  52,  53,  54,  55,
+			56,  57,  58,  59,  60,  61,  62,  63,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 108. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  37,  38,  39,
+			40,  41,  42,  43,  44,  45,  46,  47,
+			48,  49,  50,  51,  52,  53,  54,  55,
+			56,  57,  58,  59,  60,  61,  62,  63,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 109. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  37,  38,  39,
+			40,  41,  42,  43,  44,  45,  46,  47,
+			48,  49,  50,  51,  52,  53,  54,  55,
+			56,  57,  58,  59,  60,  61,  62,  63,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 110. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  37,  38,  39,
+			40,  41,  42,  43,  44,  45,  46,  47,
+			48,  49,  50,  51,  52,  53,  54,  55,
+			56,  57,  58,  59,  60,  61,  62,  63,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 111. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   1,   2,   3,   4,   5,   6,   7,
+			8,   9,   10,  11,  12,  13,  14,  15,
+			16,  17,  18,  19,  20,  21,  22,  23,
+			24,  25,  26,  27,  28,  29,  30,  31,
+			32,  33,  34,  35,  36,  38,  40,  40,
+			40,  42,  44,  46,  48,  50,  52,  54,
+			56,  58,  60,  62,  64,  66,  68,  70,
+			72,  74,  76,  78,  80,  82,  84,  86,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,  88,  88,  88,  88,  88,  88,  88,
+			88,
+		},
+		{	/* Fourth byte table 112. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   5,   7,   9,   11,  13,  15,
+			17,  19,  21,  23,  25,  27,  29,  31,
+			33,  35,  37,  39,  41,  43,  45,  47,
+			49,  51,  53,  55,  58,  60,  62,  64,
+			66,  68,  70,  72,  74,  76,  78,  80,
+			82,  84,  86,  88,  90,  92,  94,  96,
+			98,  100, 102, 104, 106, 108, 110, 112,
+			114, 116, 118, 120, 123, 125, 127, 129,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131, 131, 131, 131, 131, 131, 131, 131,
+			131,
+		},
+		{	/* Fourth byte table 113. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  45,  47,
+			49,  51,  53,  55,  57,  59,  61,  63,
+			65,  67,  69,  71,  73,  75,  77,  79,
+			81,  83,  85,  87,  89,  91,  93,  95,
+			97,  99,  101, 103, 105, 107, 110, 112,
+			114, 116, 118, 120, 122, 124, 126, 128,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130,
+		},
+		{	/* Fourth byte table 114. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			33,  35,  37,  39,  41,  43,  45,  47,
+			49,  51,  53,  55,  57,  59,  61,  63,
+			65,  67,  69,  71,  73,  75,  77,  79,
+			81,  83,  85,  87,  89,  91,  93,  95,
+			98,  100, 102, 104, 106, 108, 110, 112,
+			114, 116, 118, 120, 122, 124, 126, 128,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130,
+		},
+		{	/* Fourth byte table 115. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  21,  23,  25,  27,  29,  31,
+			33,  35,  37,  39,  41,  43,  45,  47,
+			49,  51,  53,  55,  57,  59,  61,  63,
+			65,  67,  69,  71,  73,  75,  77,  79,
+			81,  83,  86,  88,  90,  92,  94,  96,
+			98,  100, 102, 104, 106, 108, 110, 112,
+			114, 116, 118, 120, 122, 124, 126, 128,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130, 130, 130, 130, 130, 130, 130, 130,
+			130,
+		},
+		{	/* Fourth byte table 116. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   9,   11,  13,  15,
+			17,  19,  21,  23,  25,  25,  25,  26,
+			27,  28,  29,  30,  31,  32,  33,  34,
+			35,  36,  37,  38,  39,  40,  41,  42,
+			43,  44,  45,  46,  47,  48,  49,  50,
+			51,  52,  53,  54,  55,  56,  57,  58,
+			59,  60,  61,  62,  63,  64,  65,  66,
+			67,  68,  69,  70,  71,  72,  73,  74,
+			75,  75,  75,  75,  75,  75,  75,  75,
+			75,  75,  75,  75,  75,  75,  75,  75,
+			75,  75,  75,  75,  75,  75,  75,  75,
+			75,  75,  75,  75,  75,  75,  75,  75,
+			75,  75,  75,  75,  75,  75,  75,  75,
+			75,  75,  75,  75,  75,  75,  75,  75,
+			75,  75,  75,  75,  75,  75,  75,  75,
+			75,  75,  75,  75,  75,  75,  75,  75,
+			75,
+		},
+		{	/* Fourth byte table 117. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   9,   13,  17,  21,  25,  29,
+			33,  37,  42,  46,  50,  54,  58,  62,
+			66,  71,  75,  80,  85,  90,  94,  98,
+			102, 106, 110, 114, 118, 122, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127, 127, 127, 127, 127, 127, 127, 127,
+			127,
+		},
+	},
+};
+
+static const uint16_t u8_decomp_b4_16bit_tbl[2][30][257] = {
+	{
+		{	/* Fourth byte 16-bit table 0. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   38,   44,   48,   52,   56,   60,   64,
+			68,   72,   76,   80,   84,   90,   96,   102,
+			108,  112,  116,  120,  124,  130,  136,  140,
+			144,  148,  152,  156,  160,  164,  168,  172,
+			176,  180,  184,  188,  192,  196,  200,  206,
+			212,  216,  220,  224,  228,  232,  236,  240,
+			244,  250,  256,  260,  264,  268,  272,  276,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,
+		},
+		{	/* Fourth byte 16-bit table 1. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   54,   60,   66,
+			72,   78,   84,   90,   96,   100,  104,  108,
+			112,  116,  120,  124,  128,  134,  140,  144,
+			148,  152,  156,  160,  164,  170,  176,  182,
+			188,  194,  200,  204,  208,  212,  216,  220,
+			224,  228,  232,  236,  240,  244,  248,  252,
+			256,  262,  268,  274,  280,  284,  288,  292,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,
+		},
+		{	/* Fourth byte 16-bit table 2. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  107,  116,  116,  116,  116,
+			116,  120,  124,  128,  132,  138,  144,  150,
+			156,  162,  168,  174,  180,  186,  192,  198,
+			204,  210,  216,  222,  228,  234,  240,  246,
+			252,  256,  260,  264,  268,  272,  276,  282,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,
+		},
+		{	/* Fourth byte 16-bit table 3. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    6,    12,   18,   24,   30,   36,   42,
+			48,   52,   56,   60,   64,   68,   72,   76,
+			80,   86,   92,   98,   104,  110,  116,  122,
+			128,  134,  140,  146,  152,  158,  164,  170,
+			176,  182,  188,  194,  200,  204,  208,  212,
+			216,  222,  228,  234,  240,  246,  252,  258,
+			264,  270,  276,  280,  284,  288,  292,  296,
+			300,  304,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,
+		},
+		{	/* Fourth byte 16-bit table 4. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    5,    10,   17,   24,   31,   38,   45,
+			52,   57,   62,   69,   76,   83,   90,   97,
+			104,  109,  114,  121,  128,  135,  142,  142,
+			142,  147,  152,  159,  166,  173,  180,  180,
+			180,  185,  190,  197,  204,  211,  218,  225,
+			232,  237,  242,  249,  256,  263,  270,  277,
+			284,  289,  294,  301,  308,  315,  322,  329,
+			336,  341,  346,  353,  360,  367,  374,  381,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,
+		},
+		{	/* Fourth byte 16-bit table 5. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    5,    10,   17,   24,   31,   38,   38,
+			38,   43,   48,   55,   62,   69,   76,   76,
+			76,   81,   86,   93,   100,  107,  114,  121,
+			128,  128,  133,  133,  140,  140,  147,  147,
+			154,  159,  164,  171,  178,  185,  192,  199,
+			206,  211,  216,  223,  230,  237,  244,  251,
+			258,  263,  268,  273,  278,  283,  288,  293,
+			298,  303,  308,  313,  318,  323,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,
+		},
+		{	/* Fourth byte 16-bit table 6. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    7,    14,   23,   32,   41,   50,   59,
+			68,   75,   82,   91,   100,  109,  118,  127,
+			136,  143,  150,  159,  168,  177,  186,  195,
+			204,  211,  218,  227,  236,  245,  254,  263,
+			272,  279,  286,  295,  304,  313,  322,  331,
+			340,  347,  354,  363,  372,  381,  390,  399,
+			408,  413,  418,  425,  430,  437,  437,  442,
+			449,  454,  459,  464,  469,  474,  477,  480,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,
+		},
+		{	/* Fourth byte 16-bit table 7. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    3,    14,   21,   26,   33,   33,   38,
+			45,   50,   55,   60,   65,   70,   82,   94,
+			106,  111,  116,  123,  130,  130,  130,  135,
+			142,  147,  152,  157,  162,  162,  174,  186,
+			198,  203,  208,  215,  222,  227,  232,  237,
+			244,  249,  254,  259,  264,  269,  280,  291,
+			293,  293,  293,  300,  305,  312,  312,  317,
+			324,  329,  334,  339,  344,  349,  356,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,
+		},
+		{	/* Fourth byte 16-bit table 8. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    5,    10,   15,   20,   25,   30,   35,
+			40,   45,   50,   55,   60,   65,   70,   78,
+			86,   94,   102,  110,  118,  126,  134,  142,
+			150,  158,  166,  174,  182,  190,  190,  190,
+			190,  195,  200,  205,  210,  215,  220,  225,
+			230,  235,  240,  245,  250,  255,  260,  265,
+			270,  275,  280,  285,  290,  295,  300,  305,
+			310,  315,  320,  325,  330,  335,  340,  345,
+			350,  350,  350,  350,  350,  350,  350,  350,
+			350,  350,  350,  350,  350,  350,  350,  350,
+			350,  350,  350,  350,  350,  350,  350,  350,
+			350,  350,  350,  350,  350,  350,  350,  350,
+			350,  350,  350,  350,  350,  350,  350,  350,
+			350,  350,  350,  350,  350,  350,  350,  350,
+			350,  350,  350,  350,  350,  350,  350,  350,
+			350,  350,  350,  350,  350,  350,  350,  350,
+			350,
+		},
+		{	/* Fourth byte 16-bit table 9. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    15,   27,   42,   51,   66,   75,   84,
+			102,  114,  123,  132,  141,  153,  165,  177,
+			189,  201,  213,  225,  243,  249,  267,  285,
+			300,  312,  330,  348,  360,  369,  378,  390,
+			402,  417,  432,  441,  450,  462,  471,  480,
+			486,  492,  501,  510,  528,  540,  555,  573,
+			585,  594,  603,  621,  633,  651,  660,  675,
+			684,  696,  705,  717,  732,  744,  759,  771,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,
+		},
+		{	/* Fourth byte 16-bit table 10. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    15,   24,   33,   45,   54,   63,   72,
+			87,   99,   105,  123,  132,  147,  159,  171,
+			180,  189,  201,  207,  219,  234,  240,  258,
+			267,  271,  275,  279,  283,  287,  291,  295,
+			299,  303,  307,  312,  317,  322,  327,  332,
+			337,  342,  347,  352,  357,  362,  367,  372,
+			377,  382,  385,  387,  389,  392,  394,  396,
+			396,  396,  396,  396,  402,  408,  414,  420,
+			432,  432,  432,  432,  432,  432,  432,  432,
+			432,  432,  432,  432,  432,  432,  432,  432,
+			432,  432,  432,  432,  432,  432,  432,  432,
+			432,  432,  432,  432,  432,  432,  432,  432,
+			432,  432,  432,  432,  432,  432,  432,  432,
+			432,  432,  432,  432,  432,  432,  432,  432,
+			432,  432,  432,  432,  432,  432,  432,  432,
+			432,  432,  432,  432,  432,  432,  432,  432,
+			432,
+		},
+		{	/* Fourth byte 16-bit table 11. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  124,
+			128,  132,  136,  140,  144,  148,  152,  156,
+			160,  164,  168,  172,  176,  180,  184,  188,
+			192,  196,  200,  204,  208,  212,  216,  220,
+			224,  228,  232,  236,  240,  244,  248,  252,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,
+		},
+		{	/* Fourth byte 16-bit table 12. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  124,
+			128,  132,  136,  140,  144,  148,  152,  156,
+			160,  164,  168,  172,  176,  180,  184,  188,
+			192,  196,  200,  204,  208,  212,  216,  220,
+			224,  228,  232,  236,  240,  244,  248,  252,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,
+		},
+		{	/* Fourth byte 16-bit table 13. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  124,
+			128,  132,  136,  140,  144,  148,  152,  156,
+			160,  164,  168,  172,  176,  180,  184,  188,
+			192,  196,  200,  204,  208,  212,  216,  220,
+			224,  228,  232,  236,  240,  244,  248,  252,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,
+		},
+		{	/* Fourth byte 16-bit table 14. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  124,
+			128,  132,  136,  140,  144,  148,  152,  156,
+			160,  164,  168,  172,  176,  180,  184,  188,
+			192,  196,  200,  204,  208,  212,  216,  220,
+			224,  228,  232,  236,  240,  244,  248,  252,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,
+		},
+		{	/* Fourth byte 16-bit table 15. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    6,    12,   18,   24,   30,   34,   38,
+			42,   46,   50,   54,   58,   62,   66,   70,
+			74,   78,   82,   86,   90,   94,   98,   102,
+			106,  110,  114,  118,  122,  126,  130,  134,
+			138,  142,  146,  150,  154,  158,  162,  166,
+			170,  174,  178,  182,  186,  190,  194,  198,
+			202,  206,  210,  214,  218,  222,  226,  230,
+			234,  238,  242,  246,  250,  254,  258,  262,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,
+		},
+		{	/* Fourth byte 16-bit table 16. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  125,
+			130,  135,  140,  145,  150,  156,  162,  168,
+			174,  180,  186,  190,  194,  198,  202,  206,
+			210,  214,  218,  222,  226,  230,  234,  238,
+			242,  246,  250,  254,  258,  262,  266,  270,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,
+		},
+		{	/* Fourth byte 16-bit table 17. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			98,   104,  110,  116,  122,  126,  130,  134,
+			138,  142,  146,  150,  154,  158,  162,  166,
+			170,  174,  178,  182,  186,  190,  194,  198,
+			202,  206,  210,  214,  218,  222,  226,  230,
+			234,  238,  242,  246,  250,  254,  258,  262,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,
+		},
+		{	/* Fourth byte 16-bit table 18. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  124,
+			130,  136,  140,  144,  148,  152,  156,  160,
+			164,  168,  172,  176,  180,  184,  188,  192,
+			196,  200,  204,  210,  216,  222,  226,  230,
+			234,  238,  242,  246,  250,  254,  258,  262,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,
+		},
+		{	/* Fourth byte 16-bit table 19. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    6,    12,   18,   24,   30,   36,   42,
+			48,   54,   60,   66,   72,   78,   84,   90,
+			96,   102,  108,  114,  120,  126,  132,  138,
+			144,  150,  156,  162,  168,  174,  180,  186,
+			192,  198,  204,  210,  216,  222,  228,  234,
+			240,  246,  252,  258,  264,  270,  276,  282,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,
+		},
+		{	/* Fourth byte 16-bit table 20. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    6,    12,   18,   24,   30,   36,   42,
+			48,   54,   60,   66,   72,   78,   84,   90,
+			96,   96,   96,   102,  108,  114,  120,  126,
+			132,  138,  144,  150,  156,  162,  168,  174,
+			180,  186,  192,  198,  204,  210,  216,  222,
+			228,  234,  240,  246,  252,  258,  264,  270,
+			276,  282,  288,  294,  300,  306,  312,  318,
+			324,  330,  336,  342,  348,  354,  360,  366,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,
+		},
+		{	/* Fourth byte 16-bit table 21. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   17,   21,   25,   29,
+			33,   37,   41,   45,   49,   53,   58,   62,
+			66,   70,   74,   79,   83,   87,   91,   96,
+			100,  104,  108,  112,  116,  121,  125,  129,
+			133,  137,  141,  145,  149,  153,  157,  161,
+			165,  169,  173,  177,  181,  185,  189,  193,
+			197,  201,  205,  209,  213,  218,  222,  226,
+			230,  235,  239,  243,  247,  251,  255,  259,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,
+		},
+		{	/* Fourth byte 16-bit table 22. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  105,  109,  113,  117,  121,  125,
+			129,  134,  139,  143,  147,  151,  155,  159,
+			163,  167,  171,  175,  179,  184,  188,  192,
+			196,  200,  205,  209,  213,  217,  221,  225,
+			229,  233,  237,  241,  246,  250,  255,  259,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,
+		},
+		{	/* Fourth byte 16-bit table 23. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   41,   45,   49,   53,   57,   61,
+			66,   70,   75,   80,   84,   88,   92,   96,
+			101,  106,  110,  114,  118,  122,  126,  130,
+			134,  138,  142,  146,  150,  155,  159,  163,
+			167,  171,  175,  179,  183,  187,  191,  195,
+			199,  203,  207,  211,  215,  219,  223,  227,
+			231,  236,  240,  244,  248,  252,  256,  261,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,
+		},
+		{	/* Fourth byte 16-bit table 24. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   45,   49,   53,   57,   61,
+			65,   69,   73,   77,   81,   85,   89,   93,
+			97,   101,  105,  109,  113,  117,  122,  126,
+			130,  134,  138,  142,  147,  151,  155,  159,
+			163,  167,  171,  175,  179,  184,  188,  192,
+			196,  201,  205,  209,  213,  217,  221,  225,
+			230,  235,  240,  244,  249,  253,  257,  261,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,
+		},
+		{	/* Fourth byte 16-bit table 25. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   29,
+			33,   37,   41,   45,   49,   53,   58,   62,
+			66,   71,   76,   80,   84,   88,   92,   96,
+			100,  104,  108,  112,  117,  121,  126,  130,
+			135,  139,  143,  147,  152,  156,  160,  165,
+			170,  174,  178,  182,  186,  190,  194,  198,
+			202,  206,  210,  214,  218,  222,  227,  231,
+			236,  240,  245,  249,  254,  259,  264,  268,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,
+		},
+		{	/* Fourth byte 16-bit table 26. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    9,    14,   19,   24,   28,   32,
+			36,   40,   44,   48,   52,   56,   61,   65,
+			69,   73,   77,   82,   86,   91,   96,   100,
+			104,  108,  112,  116,  120,  125,  130,  135,
+			139,  143,  148,  152,  156,  160,  165,  169,
+			173,  177,  181,  185,  190,  194,  198,  202,
+			206,  210,  214,  219,  224,  228,  233,  237,
+			242,  246,  250,  254,  259,  264,  268,  273,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,
+		},
+		{	/* Fourth byte 16-bit table 27. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    5,    9,    13,   17,   21,   25,   29,
+			34,   39,   44,   49,   53,   57,   61,   65,
+			69,   73,   77,   81,   85,   89,   93,   97,
+			102,  106,  110,  114,  118,  122,  126,  130,
+			134,  138,  142,  146,  150,  155,  160,  165,
+			169,  173,  177,  181,  186,  190,  195,  199,
+			203,  208,  213,  217,  221,  225,  229,  233,
+			237,  241,  245,  249,  253,  257,  261,  265,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,
+		},
+		{	/* Fourth byte 16-bit table 28. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   25,   29,
+			33,   37,   41,   45,   50,   55,   59,   63,
+			67,   71,   75,   79,   84,   88,   92,   96,
+			100,  105,  110,  114,  118,  122,  127,  131,
+			135,  140,  145,  149,  153,  157,  162,  166,
+			170,  174,  178,  182,  186,  190,  195,  199,
+			203,  207,  212,  216,  220,  224,  228,  233,
+			238,  242,  246,  250,  255,  259,  264,  268,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,
+		},
+		{	/* Fourth byte 16-bit table 29. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,
+		},
+	},
+	{
+		{	/* Fourth byte 16-bit table 0. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   38,   44,   48,   52,   56,   60,   64,
+			68,   72,   76,   80,   84,   90,   96,   102,
+			108,  112,  116,  120,  124,  130,  136,  140,
+			144,  148,  152,  156,  160,  164,  168,  172,
+			176,  180,  184,  188,  192,  196,  200,  206,
+			212,  216,  220,  224,  228,  232,  236,  240,
+			244,  250,  256,  260,  264,  268,  272,  276,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,  280,  280,  280,  280,  280,  280,  280,
+			280,
+		},
+		{	/* Fourth byte 16-bit table 1. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   54,   60,   66,
+			72,   78,   84,   90,   96,   100,  104,  108,
+			112,  116,  120,  124,  128,  134,  140,  144,
+			148,  152,  156,  160,  164,  170,  176,  182,
+			188,  194,  200,  204,  208,  212,  216,  220,
+			224,  228,  232,  236,  240,  244,  248,  252,
+			256,  262,  268,  274,  280,  284,  288,  292,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,  296,  296,  296,  296,  296,  296,  296,
+			296,
+		},
+		{	/* Fourth byte 16-bit table 2. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  107,  116,  116,  116,  116,
+			116,  120,  124,  128,  132,  138,  144,  150,
+			156,  162,  168,  174,  180,  186,  192,  198,
+			204,  210,  216,  222,  228,  234,  240,  246,
+			252,  256,  260,  264,  268,  272,  276,  282,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,
+		},
+		{	/* Fourth byte 16-bit table 3. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    6,    12,   18,   24,   30,   36,   42,
+			48,   52,   56,   60,   64,   68,   72,   76,
+			80,   86,   92,   98,   104,  110,  116,  122,
+			128,  134,  140,  146,  152,  158,  164,  170,
+			176,  182,  188,  194,  200,  204,  208,  212,
+			216,  222,  228,  234,  240,  246,  252,  258,
+			264,  270,  276,  280,  284,  288,  292,  296,
+			300,  304,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,  308,  308,  308,  308,  308,  308,  308,
+			308,
+		},
+		{	/* Fourth byte 16-bit table 4. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    5,    10,   17,   24,   31,   38,   45,
+			52,   57,   62,   69,   76,   83,   90,   97,
+			104,  109,  114,  121,  128,  135,  142,  142,
+			142,  147,  152,  159,  166,  173,  180,  180,
+			180,  185,  190,  197,  204,  211,  218,  225,
+			232,  237,  242,  249,  256,  263,  270,  277,
+			284,  289,  294,  301,  308,  315,  322,  329,
+			336,  341,  346,  353,  360,  367,  374,  381,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,  388,  388,  388,  388,  388,  388,  388,
+			388,
+		},
+		{	/* Fourth byte 16-bit table 5. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    5,    10,   17,   24,   31,   38,   38,
+			38,   43,   48,   55,   62,   69,   76,   76,
+			76,   81,   86,   93,   100,  107,  114,  121,
+			128,  128,  133,  133,  140,  140,  147,  147,
+			154,  159,  164,  171,  178,  185,  192,  199,
+			206,  211,  216,  223,  230,  237,  244,  251,
+			258,  263,  268,  273,  278,  283,  288,  293,
+			298,  303,  308,  313,  318,  323,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,  328,  328,  328,  328,  328,  328,  328,
+			328,
+		},
+		{	/* Fourth byte 16-bit table 6. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    7,    14,   23,   32,   41,   50,   59,
+			68,   75,   82,   91,   100,  109,  118,  127,
+			136,  143,  150,  159,  168,  177,  186,  195,
+			204,  211,  218,  227,  236,  245,  254,  263,
+			272,  279,  286,  295,  304,  313,  322,  331,
+			340,  347,  354,  363,  372,  381,  390,  399,
+			408,  413,  418,  425,  430,  437,  437,  442,
+			449,  454,  459,  464,  469,  474,  477,  480,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,  483,  483,  483,  483,  483,  483,  483,
+			483,
+		},
+		{	/* Fourth byte 16-bit table 7. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    3,    14,   21,   26,   33,   33,   38,
+			45,   50,   55,   60,   65,   70,   82,   94,
+			106,  111,  116,  123,  130,  130,  130,  135,
+			142,  147,  152,  157,  162,  162,  174,  186,
+			198,  203,  208,  215,  222,  227,  232,  237,
+			244,  249,  254,  259,  264,  269,  280,  291,
+			293,  293,  293,  300,  305,  312,  312,  317,
+			324,  329,  334,  339,  344,  349,  356,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,  359,  359,  359,  359,  359,  359,  359,
+			359,
+		},
+		{	/* Fourth byte 16-bit table 8. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    5,    10,   15,   20,   25,   30,   35,
+			40,   45,   50,   55,   60,   65,   70,   78,
+			86,   94,   102,  110,  118,  126,  134,  142,
+			150,  158,  166,  174,  182,  190,  207,  221,
+			221,  226,  231,  236,  241,  246,  251,  256,
+			261,  266,  271,  276,  281,  286,  291,  296,
+			301,  306,  311,  316,  321,  326,  331,  336,
+			341,  346,  351,  356,  361,  366,  371,  376,
+			381,  381,  381,  381,  381,  381,  381,  381,
+			381,  381,  381,  381,  381,  381,  381,  381,
+			381,  381,  381,  381,  381,  381,  381,  381,
+			381,  381,  381,  381,  381,  381,  381,  381,
+			381,  381,  381,  381,  381,  381,  381,  381,
+			381,  381,  381,  381,  381,  381,  381,  381,
+			381,  381,  381,  381,  381,  381,  381,  381,
+			381,  381,  381,  381,  381,  381,  381,  381,
+			381,
+		},
+		{	/* Fourth byte 16-bit table 9. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    15,   27,   42,   51,   66,   75,   84,
+			102,  114,  123,  132,  141,  153,  165,  177,
+			189,  201,  213,  225,  243,  249,  267,  285,
+			300,  312,  330,  348,  360,  369,  378,  390,
+			402,  417,  432,  441,  450,  462,  471,  480,
+			486,  492,  501,  510,  528,  540,  555,  573,
+			585,  594,  603,  621,  633,  651,  660,  675,
+			684,  696,  705,  717,  732,  744,  759,  771,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,  777,  777,  777,  777,  777,  777,  777,
+			777,
+		},
+		{	/* Fourth byte 16-bit table 10. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    15,   24,   33,   45,   54,   63,   72,
+			87,   99,   105,  123,  132,  147,  159,  171,
+			180,  189,  201,  207,  219,  234,  240,  258,
+			267,  271,  275,  279,  283,  287,  291,  295,
+			299,  303,  307,  312,  317,  322,  327,  332,
+			337,  342,  347,  352,  357,  362,  367,  372,
+			377,  382,  385,  387,  389,  392,  394,  396,
+			398,  401,  404,  406,  412,  418,  424,  430,
+			442,  442,  442,  442,  442,  442,  442,  442,
+			442,  442,  442,  442,  442,  442,  442,  442,
+			442,  442,  442,  442,  442,  442,  442,  442,
+			442,  442,  442,  442,  442,  442,  442,  442,
+			442,  442,  442,  442,  442,  442,  442,  442,
+			442,  442,  442,  442,  442,  442,  442,  442,
+			442,  442,  442,  442,  442,  442,  442,  442,
+			442,  442,  442,  442,  442,  442,  442,  442,
+			442,
+		},
+		{	/* Fourth byte 16-bit table 11. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  124,
+			128,  132,  136,  140,  144,  148,  152,  156,
+			160,  164,  168,  172,  176,  180,  184,  188,
+			192,  196,  200,  204,  208,  212,  216,  220,
+			224,  228,  232,  236,  240,  244,  248,  252,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,
+		},
+		{	/* Fourth byte 16-bit table 12. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  124,
+			128,  132,  136,  140,  144,  148,  152,  156,
+			160,  164,  168,  172,  176,  180,  184,  188,
+			192,  196,  200,  204,  208,  212,  216,  220,
+			224,  228,  232,  236,  240,  244,  248,  252,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,
+		},
+		{	/* Fourth byte 16-bit table 13. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  124,
+			128,  132,  136,  140,  144,  148,  152,  156,
+			160,  164,  168,  172,  176,  180,  184,  188,
+			192,  196,  200,  204,  208,  212,  216,  220,
+			224,  228,  232,  236,  240,  244,  248,  252,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,
+		},
+		{	/* Fourth byte 16-bit table 14. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  124,
+			128,  132,  136,  140,  144,  148,  152,  156,
+			160,  164,  168,  172,  176,  180,  184,  188,
+			192,  196,  200,  204,  208,  212,  216,  220,
+			224,  228,  232,  236,  240,  244,  248,  252,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,
+		},
+		{	/* Fourth byte 16-bit table 15. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  124,
+			128,  132,  136,  140,  144,  148,  152,  156,
+			160,  164,  168,  172,  176,  180,  184,  188,
+			192,  196,  200,  204,  208,  212,  216,  220,
+			224,  228,  232,  236,  240,  244,  248,  252,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,  256,  256,  256,  256,  256,  256,  256,
+			256,
+		},
+		{	/* Fourth byte 16-bit table 16. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    6,    12,   18,   24,   30,   34,   38,
+			42,   46,   50,   54,   58,   62,   66,   70,
+			74,   78,   82,   86,   90,   94,   98,   102,
+			106,  110,  114,  118,  122,  126,  130,  134,
+			138,  142,  146,  150,  154,  158,  162,  166,
+			170,  174,  178,  182,  186,  190,  194,  198,
+			202,  206,  210,  214,  218,  222,  226,  230,
+			234,  238,  242,  246,  250,  254,  258,  262,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,
+		},
+		{	/* Fourth byte 16-bit table 17. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  125,
+			130,  135,  140,  145,  150,  156,  162,  168,
+			174,  180,  186,  190,  194,  198,  202,  206,
+			210,  214,  218,  222,  226,  230,  234,  238,
+			242,  246,  250,  254,  258,  262,  266,  270,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,  274,  274,  274,  274,  274,  274,  274,
+			274,
+		},
+		{	/* Fourth byte 16-bit table 18. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			98,   104,  110,  116,  122,  126,  130,  134,
+			138,  142,  146,  150,  154,  158,  162,  166,
+			170,  174,  178,  182,  186,  190,  194,  198,
+			202,  206,  210,  214,  218,  222,  226,  230,
+			234,  238,  242,  246,  250,  254,  258,  262,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,
+		},
+		{	/* Fourth byte 16-bit table 19. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  104,  108,  112,  116,  120,  124,
+			130,  136,  140,  144,  148,  152,  156,  160,
+			164,  168,  172,  176,  180,  184,  188,  192,
+			196,  200,  204,  210,  216,  222,  226,  230,
+			234,  238,  242,  246,  250,  254,  258,  262,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,  266,  266,  266,  266,  266,  266,  266,
+			266,
+		},
+		{	/* Fourth byte 16-bit table 20. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    6,    12,   18,   24,   30,   36,   42,
+			48,   54,   60,   66,   72,   78,   84,   90,
+			96,   102,  108,  114,  120,  126,  132,  138,
+			144,  150,  156,  162,  168,  174,  180,  186,
+			192,  198,  204,  210,  216,  222,  228,  234,
+			240,  246,  252,  258,  264,  270,  276,  282,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,  288,  288,  288,  288,  288,  288,  288,
+			288,
+		},
+		{	/* Fourth byte 16-bit table 21. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    6,    12,   18,   24,   30,   36,   42,
+			48,   54,   60,   66,   72,   78,   84,   90,
+			96,   96,   96,   102,  108,  114,  120,  126,
+			132,  138,  144,  150,  156,  162,  168,  174,
+			180,  186,  192,  198,  204,  210,  216,  222,
+			228,  234,  240,  246,  252,  258,  264,  270,
+			276,  282,  288,  294,  300,  306,  312,  318,
+			324,  330,  336,  342,  348,  354,  360,  366,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,  372,  372,  372,  372,  372,  372,  372,
+			372,
+		},
+		{	/* Fourth byte 16-bit table 22. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   17,   21,   25,   29,
+			33,   37,   41,   45,   49,   53,   58,   62,
+			66,   70,   74,   79,   83,   87,   91,   96,
+			100,  104,  108,  112,  116,  121,  125,  129,
+			133,  137,  141,  145,  149,  153,  157,  161,
+			165,  169,  173,  177,  181,  185,  189,  193,
+			197,  201,  205,  209,  213,  218,  222,  226,
+			230,  235,  239,  243,  247,  251,  255,  259,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,
+		},
+		{	/* Fourth byte 16-bit table 23. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   44,   48,   52,   56,   60,
+			64,   68,   72,   76,   80,   84,   88,   92,
+			96,   100,  105,  109,  113,  117,  121,  125,
+			129,  134,  139,  143,  147,  151,  155,  159,
+			163,  167,  171,  175,  179,  184,  188,  192,
+			196,  200,  205,  209,  213,  217,  221,  225,
+			229,  233,  237,  241,  246,  250,  255,  259,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,  263,  263,  263,  263,  263,  263,  263,
+			263,
+		},
+		{	/* Fourth byte 16-bit table 24. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   41,   45,   49,   53,   57,   61,
+			66,   70,   75,   80,   84,   88,   92,   96,
+			101,  106,  110,  114,  118,  122,  126,  130,
+			134,  138,  142,  146,  150,  155,  159,  163,
+			167,  171,  175,  179,  183,  187,  191,  195,
+			199,  203,  207,  211,  215,  219,  223,  227,
+			231,  236,  240,  244,  248,  252,  256,  261,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,
+		},
+		{	/* Fourth byte 16-bit table 25. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   28,
+			32,   36,   40,   45,   49,   53,   57,   61,
+			65,   69,   73,   77,   81,   85,   89,   93,
+			97,   101,  105,  109,  113,  117,  122,  126,
+			130,  134,  138,  142,  147,  151,  155,  159,
+			163,  167,  171,  175,  179,  184,  188,  192,
+			196,  201,  205,  209,  213,  217,  221,  225,
+			230,  235,  240,  244,  249,  253,  257,  261,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,  265,  265,  265,  265,  265,  265,  265,
+			265,
+		},
+		{	/* Fourth byte 16-bit table 26. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   24,   29,
+			33,   37,   41,   45,   49,   53,   58,   62,
+			66,   71,   76,   80,   84,   88,   92,   96,
+			100,  104,  108,  112,  117,  121,  126,  130,
+			135,  139,  143,  147,  152,  156,  160,  165,
+			170,  174,  178,  182,  186,  190,  194,  198,
+			202,  206,  210,  214,  218,  222,  227,  231,
+			236,  240,  245,  249,  254,  259,  264,  268,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,
+		},
+		{	/* Fourth byte 16-bit table 27. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    9,    14,   19,   24,   28,   32,
+			36,   40,   44,   48,   52,   56,   61,   65,
+			69,   73,   77,   82,   86,   91,   96,   100,
+			104,  108,  112,  116,  120,  125,  130,  135,
+			139,  143,  148,  152,  156,  160,  165,  169,
+			173,  177,  181,  185,  190,  194,  198,  202,
+			206,  210,  214,  219,  224,  228,  233,  237,
+			242,  246,  250,  254,  259,  264,  268,  273,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,  277,  277,  277,  277,  277,  277,  277,
+			277,
+		},
+		{	/* Fourth byte 16-bit table 28. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    5,    9,    13,   17,   21,   25,   29,
+			34,   39,   44,   49,   53,   57,   61,   65,
+			69,   73,   77,   81,   85,   89,   93,   97,
+			102,  106,  110,  114,  118,  122,  126,  130,
+			134,  138,  142,  146,  150,  155,  160,  165,
+			169,  173,  177,  181,  186,  190,  195,  199,
+			203,  208,  213,  217,  221,  225,  229,  233,
+			237,  241,  245,  249,  253,  257,  261,  265,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,  269,  269,  269,  269,  269,  269,  269,
+			269,
+		},
+		{	/* Fourth byte 16-bit table 29. */
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    0,    0,    0,    0,    0,    0,    0,
+			0,    4,    8,    12,   16,   20,   25,   29,
+			33,   37,   41,   45,   50,   55,   59,   63,
+			67,   71,   75,   79,   84,   88,   92,   96,
+			100,  105,  110,  114,  118,  122,  127,  131,
+			135,  140,  145,  149,  153,  157,  162,  166,
+			170,  174,  178,  182,  186,  190,  195,  199,
+			203,  207,  212,  216,  220,  224,  228,  233,
+			238,  242,  246,  250,  255,  259,  264,  268,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,  272,  272,  272,  272,  272,  272,  272,
+			272,
+		},
+	},
+};
+
+static const uchar_t u8_decomp_final_tbl[2][19370] = {
+	{
+		0x20, 0x20, 0xCC, 0x88, 0x61, 0x20, 0xCC, 0x84,
+		0x32, 0x33, 0x20, 0xCC, 0x81, 0xCE, 0xBC, 0x20,
+		0xCC, 0xA7, 0x31, 0x6F, 0x31, 0xE2, 0x81, 0x84,
+		0x34, 0x31, 0xE2, 0x81, 0x84, 0x32, 0x33, 0xE2,
+		0x81, 0x84, 0x34, 0xF6, 0x41, 0xCC, 0x80, 0xF6,
+		0x41, 0xCC, 0x81, 0xF6, 0x41, 0xCC, 0x82, 0xF6,
+		0x41, 0xCC, 0x83, 0xF6, 0x41, 0xCC, 0x88, 0xF6,
+		0x41, 0xCC, 0x8A, 0xF6, 0x43, 0xCC, 0xA7, 0xF6,
+		0x45, 0xCC, 0x80, 0xF6, 0x45, 0xCC, 0x81, 0xF6,
+		0x45, 0xCC, 0x82, 0xF6, 0x45, 0xCC, 0x88, 0xF6,
+		0x49, 0xCC, 0x80, 0xF6, 0x49, 0xCC, 0x81, 0xF6,
+		0x49, 0xCC, 0x82, 0xF6, 0x49, 0xCC, 0x88, 0xF6,
+		0x4E, 0xCC, 0x83, 0xF6, 0x4F, 0xCC, 0x80, 0xF6,
+		0x4F, 0xCC, 0x81, 0xF6, 0x4F, 0xCC, 0x82, 0xF6,
+		0x4F, 0xCC, 0x83, 0xF6, 0x4F, 0xCC, 0x88, 0xF6,
+		0x55, 0xCC, 0x80, 0xF6, 0x55, 0xCC, 0x81, 0xF6,
+		0x55, 0xCC, 0x82, 0xF6, 0x55, 0xCC, 0x88, 0xF6,
+		0x59, 0xCC, 0x81, 0xF6, 0x61, 0xCC, 0x80, 0xF6,
+		0x61, 0xCC, 0x81, 0xF6, 0x61, 0xCC, 0x82, 0xF6,
+		0x61, 0xCC, 0x83, 0xF6, 0x61, 0xCC, 0x88, 0xF6,
+		0x61, 0xCC, 0x8A, 0xF6, 0x63, 0xCC, 0xA7, 0xF6,
+		0x65, 0xCC, 0x80, 0xF6, 0x65, 0xCC, 0x81, 0xF6,
+		0x65, 0xCC, 0x82, 0xF6, 0x65, 0xCC, 0x88, 0xF6,
+		0x69, 0xCC, 0x80, 0xF6, 0x69, 0xCC, 0x81, 0xF6,
+		0x69, 0xCC, 0x82, 0xF6, 0x69, 0xCC, 0x88, 0xF6,
+		0x6E, 0xCC, 0x83, 0xF6, 0x6F, 0xCC, 0x80, 0xF6,
+		0x6F, 0xCC, 0x81, 0xF6, 0x6F, 0xCC, 0x82, 0xF6,
+		0x6F, 0xCC, 0x83, 0xF6, 0x6F, 0xCC, 0x88, 0xF6,
+		0x75, 0xCC, 0x80, 0xF6, 0x75, 0xCC, 0x81, 0xF6,
+		0x75, 0xCC, 0x82, 0xF6, 0x75, 0xCC, 0x88, 0xF6,
+		0x79, 0xCC, 0x81, 0xF6, 0x79, 0xCC, 0x88, 0xF6,
+		0x41, 0xCC, 0x84, 0xF6, 0x61, 0xCC, 0x84, 0xF6,
+		0x41, 0xCC, 0x86, 0xF6, 0x61, 0xCC, 0x86, 0xF6,
+		0x41, 0xCC, 0xA8, 0xF6, 0x61, 0xCC, 0xA8, 0xF6,
+		0x43, 0xCC, 0x81, 0xF6, 0x63, 0xCC, 0x81, 0xF6,
+		0x43, 0xCC, 0x82, 0xF6, 0x63, 0xCC, 0x82, 0xF6,
+		0x43, 0xCC, 0x87, 0xF6, 0x63, 0xCC, 0x87, 0xF6,
+		0x43, 0xCC, 0x8C, 0xF6, 0x63, 0xCC, 0x8C, 0xF6,
+		0x44, 0xCC, 0x8C, 0xF6, 0x64, 0xCC, 0x8C, 0xF6,
+		0x45, 0xCC, 0x84, 0xF6, 0x65, 0xCC, 0x84, 0xF6,
+		0x45, 0xCC, 0x86, 0xF6, 0x65, 0xCC, 0x86, 0xF6,
+		0x45, 0xCC, 0x87, 0xF6, 0x65, 0xCC, 0x87, 0xF6,
+		0x45, 0xCC, 0xA8, 0xF6, 0x65, 0xCC, 0xA8, 0xF6,
+		0x45, 0xCC, 0x8C, 0xF6, 0x65, 0xCC, 0x8C, 0xF6,
+		0x47, 0xCC, 0x82, 0xF6, 0x67, 0xCC, 0x82, 0xF6,
+		0x47, 0xCC, 0x86, 0xF6, 0x67, 0xCC, 0x86, 0xF6,
+		0x47, 0xCC, 0x87, 0xF6, 0x67, 0xCC, 0x87, 0xF6,
+		0x47, 0xCC, 0xA7, 0xF6, 0x67, 0xCC, 0xA7, 0xF6,
+		0x48, 0xCC, 0x82, 0xF6, 0x68, 0xCC, 0x82, 0xF6,
+		0x49, 0xCC, 0x83, 0xF6, 0x69, 0xCC, 0x83, 0xF6,
+		0x49, 0xCC, 0x84, 0xF6, 0x69, 0xCC, 0x84, 0xF6,
+		0x49, 0xCC, 0x86, 0xF6, 0x69, 0xCC, 0x86, 0xF6,
+		0x49, 0xCC, 0xA8, 0xF6, 0x69, 0xCC, 0xA8, 0xF6,
+		0x49, 0xCC, 0x87, 0x49, 0x4A, 0x69, 0x6A, 0xF6,
+		0x4A, 0xCC, 0x82, 0xF6, 0x6A, 0xCC, 0x82, 0xF6,
+		0x4B, 0xCC, 0xA7, 0xF6, 0x6B, 0xCC, 0xA7, 0xF6,
+		0x4C, 0xCC, 0x81, 0xF6, 0x6C, 0xCC, 0x81, 0xF6,
+		0x4C, 0xCC, 0xA7, 0xF6, 0x6C, 0xCC, 0xA7, 0xF6,
+		0x4C, 0xCC, 0x8C, 0xF6, 0x6C, 0xCC, 0x8C, 0x4C,
+		0xC2, 0xB7, 0x6C, 0xC2, 0xB7, 0xF6, 0x4E, 0xCC,
+		0x81, 0xF6, 0x6E, 0xCC, 0x81, 0xF6, 0x4E, 0xCC,
+		0xA7, 0xF6, 0x6E, 0xCC, 0xA7, 0xF6, 0x4E, 0xCC,
+		0x8C, 0xF6, 0x6E, 0xCC, 0x8C, 0xCA, 0xBC, 0x6E,
+		0xF6, 0x4F, 0xCC, 0x84, 0xF6, 0x6F, 0xCC, 0x84,
+		0xF6, 0x4F, 0xCC, 0x86, 0xF6, 0x6F, 0xCC, 0x86,
+		0xF6, 0x4F, 0xCC, 0x8B, 0xF6, 0x6F, 0xCC, 0x8B,
+		0xF6, 0x52, 0xCC, 0x81, 0xF6, 0x72, 0xCC, 0x81,
+		0xF6, 0x52, 0xCC, 0xA7, 0xF6, 0x72, 0xCC, 0xA7,
+		0xF6, 0x52, 0xCC, 0x8C, 0xF6, 0x72, 0xCC, 0x8C,
+		0xF6, 0x53, 0xCC, 0x81, 0xF6, 0x73, 0xCC, 0x81,
+		0xF6, 0x53, 0xCC, 0x82, 0xF6, 0x73, 0xCC, 0x82,
+		0xF6, 0x53, 0xCC, 0xA7, 0xF6, 0x73, 0xCC, 0xA7,
+		0xF6, 0x53, 0xCC, 0x8C, 0xF6, 0x73, 0xCC, 0x8C,
+		0xF6, 0x54, 0xCC, 0xA7, 0xF6, 0x74, 0xCC, 0xA7,
+		0xF6, 0x54, 0xCC, 0x8C, 0xF6, 0x74, 0xCC, 0x8C,
+		0xF6, 0x55, 0xCC, 0x83, 0xF6, 0x75, 0xCC, 0x83,
+		0xF6, 0x55, 0xCC, 0x84, 0xF6, 0x75, 0xCC, 0x84,
+		0xF6, 0x55, 0xCC, 0x86, 0xF6, 0x75, 0xCC, 0x86,
+		0xF6, 0x55, 0xCC, 0x8A, 0xF6, 0x75, 0xCC, 0x8A,
+		0xF6, 0x55, 0xCC, 0x8B, 0xF6, 0x75, 0xCC, 0x8B,
+		0xF6, 0x55, 0xCC, 0xA8, 0xF6, 0x75, 0xCC, 0xA8,
+		0xF6, 0x57, 0xCC, 0x82, 0xF6, 0x77, 0xCC, 0x82,
+		0xF6, 0x59, 0xCC, 0x82, 0xF6, 0x79, 0xCC, 0x82,
+		0xF6, 0x59, 0xCC, 0x88, 0xF6, 0x5A, 0xCC, 0x81,
+		0xF6, 0x7A, 0xCC, 0x81, 0xF6, 0x5A, 0xCC, 0x87,
+		0xF6, 0x7A, 0xCC, 0x87, 0xF6, 0x5A, 0xCC, 0x8C,
+		0xF6, 0x7A, 0xCC, 0x8C, 0x73, 0xF6, 0x4F, 0xCC,
+		0x9B, 0xF6, 0x6F, 0xCC, 0x9B, 0xF6, 0x55, 0xCC,
+		0x9B, 0xF6, 0x75, 0xCC, 0x9B, 0x44, 0x5A, 0xCC,
+		0x8C, 0x44, 0x7A, 0xCC, 0x8C, 0x64, 0x7A, 0xCC,
+		0x8C, 0x4C, 0x4A, 0x4C, 0x6A, 0x6C, 0x6A, 0x4E,
+		0x4A, 0x4E, 0x6A, 0x6E, 0x6A, 0xF6, 0x41, 0xCC,
+		0x8C, 0xF6, 0x61, 0xCC, 0x8C, 0xF6, 0x49, 0xCC,
+		0x8C, 0xF6, 0x69, 0xCC, 0x8C, 0xF6, 0x4F, 0xCC,
+		0x8C, 0xF6, 0x6F, 0xCC, 0x8C, 0xF6, 0x55, 0xCC,
+		0x8C, 0xF6, 0x75, 0xCC, 0x8C, 0xF6, 0x55, 0xCC,
+		0x88, 0xCC, 0x84, 0xF6, 0x75, 0xCC, 0x88, 0xCC,
+		0x84, 0xF6, 0x55, 0xCC, 0x88, 0xCC, 0x81, 0xF6,
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+		0xD1, 0x8B, 0xCC, 0x88, 0xD5, 0xA5, 0xD6, 0x82,
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+		0xA4, 0xB3, 0xE0, 0xA4, 0xBC, 0xF6, 0xE0, 0xA4,
+		0x95, 0xE0, 0xA4, 0xBC, 0xF6, 0xE0, 0xA4, 0x96,
+		0xE0, 0xA4, 0xBC, 0xF6, 0xE0, 0xA4, 0x97, 0xE0,
+		0xA4, 0xBC, 0xF6, 0xE0, 0xA4, 0x9C, 0xE0, 0xA4,
+		0xBC, 0xF6, 0xE0, 0xA4, 0xA1, 0xE0, 0xA4, 0xBC,
+		0xF6, 0xE0, 0xA4, 0xA2, 0xE0, 0xA4, 0xBC, 0xF6,
+		0xE0, 0xA4, 0xAB, 0xE0, 0xA4, 0xBC, 0xF6, 0xE0,
+		0xA4, 0xAF, 0xE0, 0xA4, 0xBC, 0xF6, 0xE0, 0xA7,
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+		0xF6, 0xE0, 0xA8, 0xB2, 0xE0, 0xA8, 0xBC, 0xF6,
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+		0xA8, 0x96, 0xE0, 0xA8, 0xBC, 0xF6, 0xE0, 0xA8,
+		0x97, 0xE0, 0xA8, 0xBC, 0xF6, 0xE0, 0xA8, 0x9C,
+		0xE0, 0xA8, 0xBC, 0xF6, 0xE0, 0xA8, 0xAB, 0xE0,
+		0xA8, 0xBC, 0xF6, 0xE0, 0xAD, 0x87, 0xE0, 0xAD,
+		0x96, 0xF6, 0xE0, 0xAD, 0x87, 0xE0, 0xAC, 0xBE,
+		0xF6, 0xE0, 0xAD, 0x87, 0xE0, 0xAD, 0x97, 0xF6,
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+		0xAE, 0xBE, 0xF6, 0xE0, 0xAF, 0x86, 0xE0, 0xAF,
+		0x97, 0xF6, 0xE0, 0xB1, 0x86, 0xE0, 0xB1, 0x96,
+		0xF6, 0xE0, 0xB2, 0xBF, 0xE0, 0xB3, 0x95, 0xF6,
+		0xE0, 0xB3, 0x86, 0xE0, 0xB3, 0x95, 0xF6, 0xE0,
+		0xB3, 0x86, 0xE0, 0xB3, 0x96, 0xF6, 0xE0, 0xB3,
+		0x86, 0xE0, 0xB3, 0x82, 0xF6, 0xE0, 0xB3, 0x86,
+		0xE0, 0xB3, 0x82, 0xE0, 0xB3, 0x95, 0xF6, 0xE0,
+		0xB5, 0x86, 0xE0, 0xB4, 0xBE, 0xF6, 0xE0, 0xB5,
+		0x87, 0xE0, 0xB4, 0xBE, 0xF6, 0xE0, 0xB5, 0x86,
+		0xE0, 0xB5, 0x97, 0xF6, 0xE0, 0xB7, 0x99, 0xE0,
+		0xB7, 0x8A, 0xF6, 0xE0, 0xB7, 0x99, 0xE0, 0xB7,
+		0x8F, 0xF6, 0xE0, 0xB7, 0x99, 0xE0, 0xB7, 0x8F,
+		0xE0, 0xB7, 0x8A, 0xF6, 0xE0, 0xB7, 0x99, 0xE0,
+		0xB7, 0x9F, 0xE0, 0xB9, 0x8D, 0xE0, 0xB8, 0xB2,
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+		0x82, 0xE0, 0xBE, 0xB7, 0xF6, 0xE0, 0xBD, 0x8C,
+		0xE0, 0xBE, 0xB7, 0xF6, 0xE0, 0xBD, 0x91, 0xE0,
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+		0xB7, 0xF6, 0xE0, 0xBD, 0x9B, 0xE0, 0xBE, 0xB7,
+		0xF6, 0xE0, 0xBD, 0x80, 0xE0, 0xBE, 0xB5, 0xF6,
+		0xE0, 0xBD, 0xB1, 0xE0, 0xBD, 0xB2, 0xF6, 0xE0,
+		0xBD, 0xB1, 0xE0, 0xBD, 0xB4, 0xF6, 0xE0, 0xBE,
+		0xB2, 0xE0, 0xBE, 0x80, 0xE0, 0xBE, 0xB2, 0xE0,
+		0xBD, 0xB1, 0xE0, 0xBE, 0x80, 0xF6, 0xE0, 0xBE,
+		0xB3, 0xE0, 0xBE, 0x80, 0xE0, 0xBE, 0xB3, 0xE0,
+		0xBD, 0xB1, 0xE0, 0xBE, 0x80, 0xF6, 0xE0, 0xBD,
+		0xB1, 0xE0, 0xBE, 0x80, 0xF6, 0xE0, 0xBE, 0x92,
+		0xE0, 0xBE, 0xB7, 0xF6, 0xE0, 0xBE, 0x9C, 0xE0,
+		0xBE, 0xB7, 0xF6, 0xE0, 0xBE, 0xA1, 0xE0, 0xBE,
+		0xB7, 0xF6, 0xE0, 0xBE, 0xA6, 0xE0, 0xBE, 0xB7,
+		0xF6, 0xE0, 0xBE, 0xAB, 0xE0, 0xBE, 0xB7, 0xF6,
+		0xE0, 0xBE, 0x90, 0xE0, 0xBE, 0xB5, 0xF6, 0xE1,
+		0x80, 0xA5, 0xE1, 0x80, 0xAE, 0xF6, 0x41, 0xCC,
+		0xA5, 0xF6, 0x61, 0xCC, 0xA5, 0xF6, 0x42, 0xCC,
+		0x87, 0xF6, 0x62, 0xCC, 0x87, 0xF6, 0x42, 0xCC,
+		0xA3, 0xF6, 0x62, 0xCC, 0xA3, 0xF6, 0x42, 0xCC,
+		0xB1, 0xF6, 0x62, 0xCC, 0xB1, 0xF6, 0x43, 0xCC,
+		0xA7, 0xCC, 0x81, 0xF6, 0x63, 0xCC, 0xA7, 0xCC,
+		0x81, 0xF6, 0x44, 0xCC, 0x87, 0xF6, 0x64, 0xCC,
+		0x87, 0xF6, 0x44, 0xCC, 0xA3, 0xF6, 0x64, 0xCC,
+		0xA3, 0xF6, 0x44, 0xCC, 0xB1, 0xF6, 0x64, 0xCC,
+		0xB1, 0xF6, 0x44, 0xCC, 0xA7, 0xF6, 0x64, 0xCC,
+		0xA7, 0xF6, 0x44, 0xCC, 0xAD, 0xF6, 0x64, 0xCC,
+		0xAD, 0xF6, 0x45, 0xCC, 0x84, 0xCC, 0x80, 0xF6,
+		0x65, 0xCC, 0x84, 0xCC, 0x80, 0xF6, 0x45, 0xCC,
+		0x84, 0xCC, 0x81, 0xF6, 0x65, 0xCC, 0x84, 0xCC,
+		0x81, 0xF6, 0x45, 0xCC, 0xAD, 0xF6, 0x65, 0xCC,
+		0xAD, 0xF6, 0x45, 0xCC, 0xB0, 0xF6, 0x65, 0xCC,
+		0xB0, 0xF6, 0x45, 0xCC, 0xA7, 0xCC, 0x86, 0xF6,
+		0x65, 0xCC, 0xA7, 0xCC, 0x86, 0xF6, 0x46, 0xCC,
+		0x87, 0xF6, 0x66, 0xCC, 0x87, 0xF6, 0x47, 0xCC,
+		0x84, 0xF6, 0x67, 0xCC, 0x84, 0xF6, 0x48, 0xCC,
+		0x87, 0xF6, 0x68, 0xCC, 0x87, 0xF6, 0x48, 0xCC,
+		0xA3, 0xF6, 0x68, 0xCC, 0xA3, 0xF6, 0x48, 0xCC,
+		0x88, 0xF6, 0x68, 0xCC, 0x88, 0xF6, 0x48, 0xCC,
+		0xA7, 0xF6, 0x68, 0xCC, 0xA7, 0xF6, 0x48, 0xCC,
+		0xAE, 0xF6, 0x68, 0xCC, 0xAE, 0xF6, 0x49, 0xCC,
+		0xB0, 0xF6, 0x69, 0xCC, 0xB0, 0xF6, 0x49, 0xCC,
+		0x88, 0xCC, 0x81, 0xF6, 0x69, 0xCC, 0x88, 0xCC,
+		0x81, 0xF6, 0x4B, 0xCC, 0x81, 0xF6, 0x6B, 0xCC,
+		0x81, 0xF6, 0x4B, 0xCC, 0xA3, 0xF6, 0x6B, 0xCC,
+		0xA3, 0xF6, 0x4B, 0xCC, 0xB1, 0xF6, 0x6B, 0xCC,
+		0xB1, 0xF6, 0x4C, 0xCC, 0xA3, 0xF6, 0x6C, 0xCC,
+		0xA3, 0xF6, 0x4C, 0xCC, 0xA3, 0xCC, 0x84, 0xF6,
+		0x6C, 0xCC, 0xA3, 0xCC, 0x84, 0xF6, 0x4C, 0xCC,
+		0xB1, 0xF6, 0x6C, 0xCC, 0xB1, 0xF6, 0x4C, 0xCC,
+		0xAD, 0xF6, 0x6C, 0xCC, 0xAD, 0xF6, 0x4D, 0xCC,
+		0x81, 0xF6, 0x6D, 0xCC, 0x81, 0xF6, 0x4D, 0xCC,
+		0x87, 0xF6, 0x6D, 0xCC, 0x87, 0xF6, 0x4D, 0xCC,
+		0xA3, 0xF6, 0x6D, 0xCC, 0xA3, 0xF6, 0x4E, 0xCC,
+		0x87, 0xF6, 0x6E, 0xCC, 0x87, 0xF6, 0x4E, 0xCC,
+		0xA3, 0xF6, 0x6E, 0xCC, 0xA3, 0xF6, 0x4E, 0xCC,
+		0xB1, 0xF6, 0x6E, 0xCC, 0xB1, 0xF6, 0x4E, 0xCC,
+		0xAD, 0xF6, 0x6E, 0xCC, 0xAD, 0xF6, 0x4F, 0xCC,
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+		0xE5, 0xB0, 0xA2, 0xE5, 0xB0, 0xB8, 0xE5, 0xB1,
+		0xAE, 0xE5, 0xB1, 0xB1, 0xE5, 0xB7, 0x9B, 0xE5,
+		0xB7, 0xA5, 0xE5, 0xB7, 0xB1, 0xE5, 0xB7, 0xBE,
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+		0xBF, 0xE5, 0xBB, 0xB4, 0xE5, 0xBB, 0xBE, 0xE5,
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+		0x83, 0xE6, 0x88, 0x88, 0xE6, 0x88, 0xB6, 0xE6,
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+		0xE6, 0x9C, 0xA8, 0xE6, 0xAC, 0xA0, 0xE6, 0xAD,
+		0xA2, 0xE6, 0xAD, 0xB9, 0xE6, 0xAE, 0xB3, 0xE6,
+		0xAF, 0x8B, 0xE6, 0xAF, 0x94, 0xE6, 0xAF, 0x9B,
+		0xE6, 0xB0, 0x8F, 0xE6, 0xB0, 0x94, 0xE6, 0xB0,
+		0xB4, 0xE7, 0x81, 0xAB, 0xE7, 0x88, 0xAA, 0xE7,
+		0x88, 0xB6, 0xE7, 0x88, 0xBB, 0xE7, 0x88, 0xBF,
+		0xE7, 0x89, 0x87, 0xE7, 0x89, 0x99, 0xE7, 0x89,
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+		0x96, 0x92, 0xE7, 0x99, 0xB6, 0xE7, 0x99, 0xBD,
+		0xE7, 0x9A, 0xAE, 0xE7, 0x9A, 0xBF, 0xE7, 0x9B,
+		0xAE, 0xE7, 0x9F, 0x9B, 0xE7, 0x9F, 0xA2, 0xE7,
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+		0x8B, 0xE7, 0xAB, 0xB9, 0xE7, 0xB1, 0xB3, 0xE7,
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+		0xE8, 0xA6, 0x8B, 0xE8, 0xA7, 0x92, 0xE8, 0xA8,
+		0x80, 0xE8, 0xB0, 0xB7, 0xE8, 0xB1, 0x86, 0xE8,
+		0xB1, 0x95, 0xE8, 0xB1, 0xB8, 0xE8, 0xB2, 0x9D,
+		0xE8, 0xB5, 0xA4, 0xE8, 0xB5, 0xB0, 0xE8, 0xB6,
+		0xB3, 0xE8, 0xBA, 0xAB, 0xE8, 0xBB, 0x8A, 0xE8,
+		0xBE, 0x9B, 0xE8, 0xBE, 0xB0, 0xE8, 0xBE, 0xB5,
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+		0x86, 0xE9, 0x87, 0x8C, 0xE9, 0x87, 0x91, 0xE9,
+		0x95, 0xB7, 0xE9, 0x96, 0x80, 0xE9, 0x98, 0x9C,
+		0xE9, 0x9A, 0xB6, 0xE9, 0x9A, 0xB9, 0xE9, 0x9B,
+		0xA8, 0xE9, 0x9D, 0x91, 0xE9, 0x9D, 0x9E, 0xE9,
+		0x9D, 0xA2, 0xE9, 0x9D, 0xA9, 0xE9, 0x9F, 0x8B,
+		0xE9, 0x9F, 0xAD, 0xE9, 0x9F, 0xB3, 0xE9, 0xA0,
+		0x81, 0xE9, 0xA2, 0xA8, 0xE9, 0xA3, 0x9B, 0xE9,
+		0xA3, 0x9F, 0xE9, 0xA6, 0x96, 0xE9, 0xA6, 0x99,
+		0xE9, 0xA6, 0xAC, 0xE9, 0xAA, 0xA8, 0xE9, 0xAB,
+		0x98, 0xE9, 0xAB, 0x9F, 0xE9, 0xAC, 0xA5, 0xE9,
+		0xAC, 0xAF, 0xE9, 0xAC, 0xB2, 0xE9, 0xAC, 0xBC,
+		0xE9, 0xAD, 0x9A, 0xE9, 0xB3, 0xA5, 0xE9, 0xB9,
+		0xB5, 0xE9, 0xB9, 0xBF, 0xE9, 0xBA, 0xA5, 0xE9,
+		0xBA, 0xBB, 0xE9, 0xBB, 0x83, 0xE9, 0xBB, 0x8D,
+		0xE9, 0xBB, 0x91, 0xE9, 0xBB, 0xB9, 0xE9, 0xBB,
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+		0xE9, 0xBD, 0x92, 0xE9, 0xBE, 0x8D, 0xE9, 0xBE,
+		0x9C, 0xE9, 0xBE, 0xA0, 0x20, 0xE3, 0x80, 0x92,
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+		0x85, 0xF6, 0xE3, 0x81, 0x8B, 0xE3, 0x82, 0x99,
+		0xF6, 0xE3, 0x81, 0x8D, 0xE3, 0x82, 0x99, 0xF6,
+		0xE3, 0x81, 0x8F, 0xE3, 0x82, 0x99, 0xF6, 0xE3,
+		0x81, 0x91, 0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x81,
+		0x93, 0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x81, 0x95,
+		0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x81, 0x97, 0xE3,
+		0x82, 0x99, 0xF6, 0xE3, 0x81, 0x99, 0xE3, 0x82,
+		0x99, 0xF6, 0xE3, 0x81, 0x9B, 0xE3, 0x82, 0x99,
+		0xF6, 0xE3, 0x81, 0x9D, 0xE3, 0x82, 0x99, 0xF6,
+		0xE3, 0x81, 0x9F, 0xE3, 0x82, 0x99, 0xF6, 0xE3,
+		0x81, 0xA1, 0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x81,
+		0xA4, 0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x81, 0xA6,
+		0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x81, 0xA8, 0xE3,
+		0x82, 0x99, 0xF6, 0xE3, 0x81, 0xAF, 0xE3, 0x82,
+		0x99, 0xF6, 0xE3, 0x81, 0xAF, 0xE3, 0x82, 0x9A,
+		0xF6, 0xE3, 0x81, 0xB2, 0xE3, 0x82, 0x99, 0xF6,
+		0xE3, 0x81, 0xB2, 0xE3, 0x82, 0x9A, 0xF6, 0xE3,
+		0x81, 0xB5, 0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x81,
+		0xB5, 0xE3, 0x82, 0x9A, 0xF6, 0xE3, 0x81, 0xB8,
+		0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x81, 0xB8, 0xE3,
+		0x82, 0x9A, 0xF6, 0xE3, 0x81, 0xBB, 0xE3, 0x82,
+		0x99, 0xF6, 0xE3, 0x81, 0xBB, 0xE3, 0x82, 0x9A,
+		0xF6, 0xE3, 0x81, 0x86, 0xE3, 0x82, 0x99, 0x20,
+		0xE3, 0x82, 0x99, 0x20, 0xE3, 0x82, 0x9A, 0xF6,
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+		0x82, 0x99, 0xF6, 0xE3, 0x82, 0xAF, 0xE3, 0x82,
+		0x99, 0xF6, 0xE3, 0x82, 0xB1, 0xE3, 0x82, 0x99,
+		0xF6, 0xE3, 0x82, 0xB3, 0xE3, 0x82, 0x99, 0xF6,
+		0xE3, 0x82, 0xB5, 0xE3, 0x82, 0x99, 0xF6, 0xE3,
+		0x82, 0xB7, 0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x82,
+		0xB9, 0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x82, 0xBB,
+		0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x82, 0xBD, 0xE3,
+		0x82, 0x99, 0xF6, 0xE3, 0x82, 0xBF, 0xE3, 0x82,
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+		0xF6, 0xE3, 0x83, 0x84, 0xE3, 0x82, 0x99, 0xF6,
+		0xE3, 0x83, 0x86, 0xE3, 0x82, 0x99, 0xF6, 0xE3,
+		0x83, 0x88, 0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x83,
+		0x8F, 0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x83, 0x8F,
+		0xE3, 0x82, 0x9A, 0xF6, 0xE3, 0x83, 0x92, 0xE3,
+		0x82, 0x99, 0xF6, 0xE3, 0x83, 0x92, 0xE3, 0x82,
+		0x9A, 0xF6, 0xE3, 0x83, 0x95, 0xE3, 0x82, 0x99,
+		0xF6, 0xE3, 0x83, 0x95, 0xE3, 0x82, 0x9A, 0xF6,
+		0xE3, 0x83, 0x98, 0xE3, 0x82, 0x99, 0xF6, 0xE3,
+		0x83, 0x98, 0xE3, 0x82, 0x9A, 0xF6, 0xE3, 0x83,
+		0x9B, 0xE3, 0x82, 0x99, 0xF6, 0xE3, 0x83, 0x9B,
+		0xE3, 0x82, 0x9A, 0xF6, 0xE3, 0x82, 0xA6, 0xE3,
+		0x82, 0x99, 0xF6, 0xE3, 0x83, 0xAF, 0xE3, 0x82,
+		0x99, 0xF6, 0xE3, 0x83, 0xB0, 0xE3, 0x82, 0x99,
+		0xF6, 0xE3, 0x83, 0xB1, 0xE3, 0x82, 0x99, 0xF6,
+		0xE3, 0x83, 0xB2, 0xE3, 0x82, 0x99, 0xF6, 0xE3,
+		0x83, 0xBD, 0xE3, 0x82, 0x99, 0xE3, 0x82, 0xB3,
+		0xE3, 0x83, 0x88, 0xE1, 0x84, 0x80, 0xE1, 0x84,
+		0x81, 0xE1, 0x86, 0xAA, 0xE1, 0x84, 0x82, 0xE1,
+		0x86, 0xAC, 0xE1, 0x86, 0xAD, 0xE1, 0x84, 0x83,
+		0xE1, 0x84, 0x84, 0xE1, 0x84, 0x85, 0xE1, 0x86,
+		0xB0, 0xE1, 0x86, 0xB1, 0xE1, 0x86, 0xB2, 0xE1,
+		0x86, 0xB3, 0xE1, 0x86, 0xB4, 0xE1, 0x86, 0xB5,
+		0xE1, 0x84, 0x9A, 0xE1, 0x84, 0x86, 0xE1, 0x84,
+		0x87, 0xE1, 0x84, 0x88, 0xE1, 0x84, 0xA1, 0xE1,
+		0x84, 0x89, 0xE1, 0x84, 0x8A, 0xE1, 0x84, 0x8B,
+		0xE1, 0x84, 0x8C, 0xE1, 0x84, 0x8D, 0xE1, 0x84,
+		0x8E, 0xE1, 0x84, 0x8F, 0xE1, 0x84, 0x90, 0xE1,
+		0x84, 0x91, 0xE1, 0x84, 0x92, 0xE1, 0x85, 0xA1,
+		0xE1, 0x85, 0xA2, 0xE1, 0x85, 0xA3, 0xE1, 0x85,
+		0xA4, 0xE1, 0x85, 0xA5, 0xE1, 0x85, 0xA6, 0xE1,
+		0x85, 0xA7, 0xE1, 0x85, 0xA8, 0xE1, 0x85, 0xA9,
+		0xE1, 0x85, 0xAA, 0xE1, 0x85, 0xAB, 0xE1, 0x85,
+		0xAC, 0xE1, 0x85, 0xAD, 0xE1, 0x85, 0xAE, 0xE1,
+		0x85, 0xAF, 0xE1, 0x85, 0xB0, 0xE1, 0x85, 0xB1,
+		0xE1, 0x85, 0xB2, 0xE1, 0x85, 0xB3, 0xE1, 0x85,
+		0xB4, 0xE1, 0x85, 0xB5, 0xE1, 0x85, 0xA0, 0xE1,
+		0x84, 0x94, 0xE1, 0x84, 0x95, 0xE1, 0x87, 0x87,
+		0xE1, 0x87, 0x88, 0xE1, 0x87, 0x8C, 0xE1, 0x87,
+		0x8E, 0xE1, 0x87, 0x93, 0xE1, 0x87, 0x97, 0xE1,
+		0x87, 0x99, 0xE1, 0x84, 0x9C, 0xE1, 0x87, 0x9D,
+		0xE1, 0x87, 0x9F, 0xE1, 0x84, 0x9D, 0xE1, 0x84,
+		0x9E, 0xE1, 0x84, 0xA0, 0xE1, 0x84, 0xA2, 0xE1,
+		0x84, 0xA3, 0xE1, 0x84, 0xA7, 0xE1, 0x84, 0xA9,
+		0xE1, 0x84, 0xAB, 0xE1, 0x84, 0xAC, 0xE1, 0x84,
+		0xAD, 0xE1, 0x84, 0xAE, 0xE1, 0x84, 0xAF, 0xE1,
+		0x84, 0xB2, 0xE1, 0x84, 0xB6, 0xE1, 0x85, 0x80,
+		0xE1, 0x85, 0x87, 0xE1, 0x85, 0x8C, 0xE1, 0x87,
+		0xB1, 0xE1, 0x87, 0xB2, 0xE1, 0x85, 0x97, 0xE1,
+		0x85, 0x98, 0xE1, 0x85, 0x99, 0xE1, 0x86, 0x84,
+		0xE1, 0x86, 0x85, 0xE1, 0x86, 0x88, 0xE1, 0x86,
+		0x91, 0xE1, 0x86, 0x92, 0xE1, 0x86, 0x94, 0xE1,
+		0x86, 0x9E, 0xE1, 0x86, 0xA1, 0xE4, 0xB8, 0x80,
+		0xE4, 0xBA, 0x8C, 0xE4, 0xB8, 0x89, 0xE5, 0x9B,
+		0x9B, 0xE4, 0xB8, 0x8A, 0xE4, 0xB8, 0xAD, 0xE4,
+		0xB8, 0x8B, 0xE7, 0x94, 0xB2, 0xE4, 0xB9, 0x99,
+		0xE4, 0xB8, 0x99, 0xE4, 0xB8, 0x81, 0xE5, 0xA4,
+		0xA9, 0xE5, 0x9C, 0xB0, 0xE4, 0xBA, 0xBA, 0x28,
+		0xE1, 0x84, 0x80, 0x29, 0x28, 0xE1, 0x84, 0x82,
+		0x29, 0x28, 0xE1, 0x84, 0x83, 0x29, 0x28, 0xE1,
+		0x84, 0x85, 0x29, 0x28, 0xE1, 0x84, 0x86, 0x29,
+		0x28, 0xE1, 0x84, 0x87, 0x29, 0x28, 0xE1, 0x84,
+		0x89, 0x29, 0x28, 0xE1, 0x84, 0x8B, 0x29, 0x28,
+		0xE1, 0x84, 0x8C, 0x29, 0x28, 0xE1, 0x84, 0x8E,
+		0x29, 0x28, 0xE1, 0x84, 0x8F, 0x29, 0x28, 0xE1,
+		0x84, 0x90, 0x29, 0x28, 0xE1, 0x84, 0x91, 0x29,
+		0x28, 0xE1, 0x84, 0x92, 0x29, 0x28, 0xE1, 0x84,
+		0x80, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x82, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x83, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x85, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x86, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x87, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x89, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x8B, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x8C, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x8E, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x8F, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x90, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x91, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
+		0x92, 0xE1, 0x85, 0xA1, 0x29, 0x28, 0xE1, 0x84,
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+		0x80, 0x29, 0x28, 0xE4, 0xBA, 0x8C, 0x29, 0x28,
+		0xE4, 0xB8, 0x89, 0x29, 0x28, 0xE5, 0x9B, 0x9B,
+		0x29, 0x28, 0xE4, 0xBA, 0x94, 0x29, 0x28, 0xE5,
+		0x85, 0xAD, 0x29, 0x28, 0xE4, 0xB8, 0x83, 0x29,
+		0x28, 0xE5, 0x85, 0xAB, 0x29, 0x28, 0xE4, 0xB9,
+		0x9D, 0x29, 0x28, 0xE5, 0x8D, 0x81, 0x29, 0x28,
+		0xE6, 0x9C, 0x88, 0x29, 0x28, 0xE7, 0x81, 0xAB,
+		0x29, 0x28, 0xE6, 0xB0, 0xB4, 0x29, 0x28, 0xE6,
+		0x9C, 0xA8, 0x29, 0x28, 0xE9, 0x87, 0x91, 0x29,
+		0x28, 0xE5, 0x9C, 0x9F, 0x29, 0x28, 0xE6, 0x97,
+		0xA5, 0x29, 0x28, 0xE6, 0xA0, 0xAA, 0x29, 0x28,
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+		0x89, 0xB9, 0x29, 0x28, 0xE8, 0xB2, 0xA1, 0x29,
+		0x28, 0xE7, 0xA5, 0x9D, 0x29, 0x28, 0xE5, 0x8A,
+		0xB4, 0x29, 0x28, 0xE4, 0xBB, 0xA3, 0x29, 0x28,
+		0xE5, 0x91, 0xBC, 0x29, 0x28, 0xE5, 0xAD, 0xA6,
+		0x29, 0x28, 0xE7, 0x9B, 0xA3, 0x29, 0x28, 0xE4,
+		0xBC, 0x81, 0x29, 0x28, 0xE8, 0xB3, 0x87, 0x29,
+		0x28, 0xE5, 0x8D, 0x94, 0x29, 0x28, 0xE7, 0xA5,
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+		0x29, 0x32, 0x31, 0x32, 0x32, 0x32, 0x33, 0x32,
+		0x34, 0x32, 0x35, 0x32, 0x36, 0x32, 0x37, 0x32,
+		0x38, 0x32, 0x39, 0x33, 0x30, 0x33, 0x31, 0x33,
+		0x32, 0x33, 0x33, 0x33, 0x34, 0x33, 0x35, 0xE1,
+		0x84, 0x80, 0xE1, 0x84, 0x82, 0xE1, 0x84, 0x83,
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+		0x81, 0xF6, 0xD7, 0xA9, 0xD7, 0x82, 0xF6, 0xD7,
+		0xA9, 0xD6, 0xBC, 0xD7, 0x81, 0xF6, 0xD7, 0xA9,
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+		0xB7, 0xF6, 0xD7, 0x90, 0xD6, 0xB8, 0xF6, 0xD7,
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+		0xF6, 0xD7, 0x92, 0xD6, 0xBC, 0xF6, 0xD7, 0x93,
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+		0xDB, 0x90, 0xD9, 0x8A, 0xD9, 0x94, 0xD9, 0x89,
+		0xD9, 0x8A, 0xD9, 0x94, 0xD9, 0x89, 0xD9, 0x8A,
+		0xD9, 0x94, 0xD9, 0x89, 0xDB, 0x8C, 0xDB, 0x8C,
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+		0xD8, 0xAC, 0xD9, 0x8A, 0xD9, 0x94, 0xD8, 0xAD,
+		0xD9, 0x8A, 0xD9, 0x94, 0xD9, 0x85, 0xD9, 0x8A,
+		0xD9, 0x94, 0xD9, 0x89, 0xD9, 0x8A, 0xD9, 0x94,
+		0xD9, 0x8A, 0xD8, 0xA8, 0xD8, 0xAC, 0xD8, 0xA8,
+		0xD8, 0xAD, 0xD8, 0xA8, 0xD8, 0xAE, 0xD8, 0xA8,
+		0xD9, 0x85, 0xD8, 0xA8, 0xD9, 0x89, 0xD8, 0xA8,
+		0xD9, 0x8A, 0xD8, 0xAA, 0xD8, 0xAC, 0xD8, 0xAA,
+		0xD8, 0xAD, 0xD8, 0xAA, 0xD8, 0xAE, 0xD8, 0xAA,
+		0xD9, 0x85, 0xD8, 0xAA, 0xD9, 0x89, 0xD8, 0xAA,
+		0xD9, 0x8A, 0xD8, 0xAB, 0xD8, 0xAC, 0xD8, 0xAB,
+		0xD9, 0x85, 0xD8, 0xAB, 0xD9, 0x89, 0xD8, 0xAB,
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+		0xD8, 0xAD, 0xD8, 0xAE, 0xD9, 0x85, 0xD8, 0xB3,
+		0xD8, 0xAC, 0xD8, 0xB3, 0xD8, 0xAD, 0xD8, 0xB3,
+		0xD8, 0xAE, 0xD8, 0xB3, 0xD9, 0x85, 0xD8, 0xB5,
+		0xD8, 0xAD, 0xD8, 0xB5, 0xD9, 0x85, 0xD8, 0xB6,
+		0xD8, 0xAC, 0xD8, 0xB6, 0xD8, 0xAD, 0xD8, 0xB6,
+		0xD8, 0xAE, 0xD8, 0xB6, 0xD9, 0x85, 0xD8, 0xB7,
+		0xD8, 0xAD, 0xD8, 0xB7, 0xD9, 0x85, 0xD8, 0xB8,
+		0xD9, 0x85, 0xD8, 0xB9, 0xD8, 0xAC, 0xD8, 0xB9,
+		0xD9, 0x85, 0xD8, 0xBA, 0xD8, 0xAC, 0xD8, 0xBA,
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+		0xD8, 0xAD, 0xD9, 0x81, 0xD8, 0xAE, 0xD9, 0x81,
+		0xD9, 0x85, 0xD9, 0x81, 0xD9, 0x89, 0xD9, 0x81,
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+		0xD9, 0x85, 0xD9, 0x82, 0xD9, 0x89, 0xD9, 0x82,
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+		0xD8, 0xAC, 0xD9, 0x83, 0xD8, 0xAD, 0xD9, 0x83,
+		0xD8, 0xAE, 0xD9, 0x83, 0xD9, 0x84, 0xD9, 0x83,
+		0xD9, 0x85, 0xD9, 0x83, 0xD9, 0x89, 0xD9, 0x83,
+		0xD9, 0x8A, 0xD9, 0x84, 0xD8, 0xAC, 0xD9, 0x84,
+		0xD8, 0xAD, 0xD9, 0x84, 0xD8, 0xAE, 0xD9, 0x84,
+		0xD9, 0x85, 0xD9, 0x84, 0xD9, 0x89, 0xD9, 0x84,
+		0xD9, 0x8A, 0xD9, 0x85, 0xD8, 0xAC, 0xD9, 0x85,
+		0xD8, 0xAD, 0xD9, 0x85, 0xD8, 0xAE, 0xD9, 0x85,
+		0xD9, 0x85, 0xD9, 0x85, 0xD9, 0x89, 0xD9, 0x85,
+		0xD9, 0x8A, 0xD9, 0x86, 0xD8, 0xAC, 0xD9, 0x86,
+		0xD8, 0xAD, 0xD9, 0x86, 0xD8, 0xAE, 0xD9, 0x86,
+		0xD9, 0x85, 0xD9, 0x86, 0xD9, 0x89, 0xD9, 0x86,
+		0xD9, 0x8A, 0xD9, 0x87, 0xD8, 0xAC, 0xD9, 0x87,
+		0xD9, 0x85, 0xD9, 0x87, 0xD9, 0x89, 0xD9, 0x87,
+		0xD9, 0x8A, 0xD9, 0x8A, 0xD8, 0xAC, 0xD9, 0x8A,
+		0xD8, 0xAD, 0xD9, 0x8A, 0xD8, 0xAE, 0xD9, 0x8A,
+		0xD9, 0x85, 0xD9, 0x8A, 0xD9, 0x89, 0xD9, 0x8A,
+		0xD9, 0x8A, 0xD8, 0xB0, 0xD9, 0xB0, 0xD8, 0xB1,
+		0xD9, 0xB0, 0xD9, 0x89, 0xD9, 0xB0, 0x20, 0xD9,
+		0x8C, 0xD9, 0x91, 0x20, 0xD9, 0x8D, 0xD9, 0x91,
+		0x20, 0xD9, 0x8E, 0xD9, 0x91, 0x20, 0xD9, 0x8F,
+		0xD9, 0x91, 0x20, 0xD9, 0x90, 0xD9, 0x91, 0x20,
+		0xD9, 0x91, 0xD9, 0xB0, 0xD9, 0x8A, 0xD9, 0x94,
+		0xD8, 0xB1, 0xD9, 0x8A, 0xD9, 0x94, 0xD8, 0xB2,
+		0xD9, 0x8A, 0xD9, 0x94, 0xD9, 0x85, 0xD9, 0x8A,
+		0xD9, 0x94, 0xD9, 0x86, 0xD9, 0x8A, 0xD9, 0x94,
+		0xD9, 0x89, 0xD9, 0x8A, 0xD9, 0x94, 0xD9, 0x8A,
+		0xD8, 0xA8, 0xD8, 0xB1, 0xD8, 0xA8, 0xD8, 0xB2,
+		0xD8, 0xA8, 0xD9, 0x85, 0xD8, 0xA8, 0xD9, 0x86,
+		0xD8, 0xA8, 0xD9, 0x89, 0xD8, 0xA8, 0xD9, 0x8A,
+		0xD8, 0xAA, 0xD8, 0xB1, 0xD8, 0xAA, 0xD8, 0xB2,
+		0xD8, 0xAA, 0xD9, 0x85, 0xD8, 0xAA, 0xD9, 0x86,
+		0xD8, 0xAA, 0xD9, 0x89, 0xD8, 0xAA, 0xD9, 0x8A,
+		0xD8, 0xAB, 0xD8, 0xB1, 0xD8, 0xAB, 0xD8, 0xB2,
+		0xD8, 0xAB, 0xD9, 0x85, 0xD8, 0xAB, 0xD9, 0x86,
+		0xD8, 0xAB, 0xD9, 0x89, 0xD8, 0xAB, 0xD9, 0x8A,
+		0xD9, 0x81, 0xD9, 0x89, 0xD9, 0x81, 0xD9, 0x8A,
+		0xD9, 0x82, 0xD9, 0x89, 0xD9, 0x82, 0xD9, 0x8A,
+		0xD9, 0x83, 0xD8, 0xA7, 0xD9, 0x83, 0xD9, 0x84,
+		0xD9, 0x83, 0xD9, 0x85, 0xD9, 0x83, 0xD9, 0x89,
+		0xD9, 0x83, 0xD9, 0x8A, 0xD9, 0x84, 0xD9, 0x85,
+		0xD9, 0x84, 0xD9, 0x89, 0xD9, 0x84, 0xD9, 0x8A,
+		0xD9, 0x85, 0xD8, 0xA7, 0xD9, 0x85, 0xD9, 0x85,
+		0xD9, 0x86, 0xD8, 0xB1, 0xD9, 0x86, 0xD8, 0xB2,
+		0xD9, 0x86, 0xD9, 0x85, 0xD9, 0x86, 0xD9, 0x86,
+		0xD9, 0x86, 0xD9, 0x89, 0xD9, 0x86, 0xD9, 0x8A,
+		0xD9, 0x89, 0xD9, 0xB0, 0xD9, 0x8A, 0xD8, 0xB1,
+		0xD9, 0x8A, 0xD8, 0xB2, 0xD9, 0x8A, 0xD9, 0x85,
+		0xD9, 0x8A, 0xD9, 0x86, 0xD9, 0x8A, 0xD9, 0x89,
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+		0xD8, 0xAC, 0xD9, 0x8A, 0xD9, 0x94, 0xD8, 0xAD,
+		0xD9, 0x8A, 0xD9, 0x94, 0xD8, 0xAE, 0xD9, 0x8A,
+		0xD9, 0x94, 0xD9, 0x85, 0xD9, 0x8A, 0xD9, 0x94,
+		0xD9, 0x87, 0xD8, 0xA8, 0xD8, 0xAC, 0xD8, 0xA8,
+		0xD8, 0xAD, 0xD8, 0xA8, 0xD8, 0xAE, 0xD8, 0xA8,
+		0xD9, 0x85, 0xD8, 0xA8, 0xD9, 0x87, 0xD8, 0xAA,
+		0xD8, 0xAC, 0xD8, 0xAA, 0xD8, 0xAD, 0xD8, 0xAA,
+		0xD8, 0xAE, 0xD8, 0xAA, 0xD9, 0x85, 0xD8, 0xAA,
+		0xD9, 0x87, 0xD8, 0xAB, 0xD9, 0x85, 0xD8, 0xAC,
+		0xD8, 0xAD, 0xD8, 0xAC, 0xD9, 0x85, 0xD8, 0xAD,
+		0xD8, 0xAC, 0xD8, 0xAD, 0xD9, 0x85, 0xD8, 0xAE,
+		0xD8, 0xAC, 0xD8, 0xAE, 0xD9, 0x85, 0xD8, 0xB3,
+		0xD8, 0xAC, 0xD8, 0xB3, 0xD8, 0xAD, 0xD8, 0xB3,
+		0xD8, 0xAE, 0xD8, 0xB3, 0xD9, 0x85, 0xD8, 0xB5,
+		0xD8, 0xAD, 0xD8, 0xB5, 0xD8, 0xAE, 0xD8, 0xB5,
+		0xD9, 0x85, 0xD8, 0xB6, 0xD8, 0xAC, 0xD8, 0xB6,
+		0xD8, 0xAD, 0xD8, 0xB6, 0xD8, 0xAE, 0xD8, 0xB6,
+		0xD9, 0x85, 0xD8, 0xB7, 0xD8, 0xAD, 0xD8, 0xB8,
+		0xD9, 0x85, 0xD8, 0xB9, 0xD8, 0xAC, 0xD8, 0xB9,
+		0xD9, 0x85, 0xD8, 0xBA, 0xD8, 0xAC, 0xD8, 0xBA,
+		0xD9, 0x85, 0xD9, 0x81, 0xD8, 0xAC, 0xD9, 0x81,
+		0xD8, 0xAD, 0xD9, 0x81, 0xD8, 0xAE, 0xD9, 0x81,
+		0xD9, 0x85, 0xD9, 0x82, 0xD8, 0xAD, 0xD9, 0x82,
+		0xD9, 0x85, 0xD9, 0x83, 0xD8, 0xAC, 0xD9, 0x83,
+		0xD8, 0xAD, 0xD9, 0x83, 0xD8, 0xAE, 0xD9, 0x83,
+		0xD9, 0x84, 0xD9, 0x83, 0xD9, 0x85, 0xD9, 0x84,
+		0xD8, 0xAC, 0xD9, 0x84, 0xD8, 0xAD, 0xD9, 0x84,
+		0xD8, 0xAE, 0xD9, 0x84, 0xD9, 0x85, 0xD9, 0x84,
+		0xD9, 0x87, 0xD9, 0x85, 0xD8, 0xAC, 0xD9, 0x85,
+		0xD8, 0xAD, 0xD9, 0x85, 0xD8, 0xAE, 0xD9, 0x85,
+		0xD9, 0x85, 0xD9, 0x86, 0xD8, 0xAC, 0xD9, 0x86,
+		0xD8, 0xAD, 0xD9, 0x86, 0xD8, 0xAE, 0xD9, 0x86,
+		0xD9, 0x85, 0xD9, 0x86, 0xD9, 0x87, 0xD9, 0x87,
+		0xD8, 0xAC, 0xD9, 0x87, 0xD9, 0x85, 0xD9, 0x87,
+		0xD9, 0xB0, 0xD9, 0x8A, 0xD8, 0xAC, 0xD9, 0x8A,
+		0xD8, 0xAD, 0xD9, 0x8A, 0xD8, 0xAE, 0xD9, 0x8A,
+		0xD9, 0x85, 0xD9, 0x8A, 0xD9, 0x87, 0xD9, 0x8A,
+		0xD9, 0x94, 0xD9, 0x85, 0xD9, 0x8A, 0xD9, 0x94,
+		0xD9, 0x87, 0xD8, 0xA8, 0xD9, 0x85, 0xD8, 0xA8,
+		0xD9, 0x87, 0xD8, 0xAA, 0xD9, 0x85, 0xD8, 0xAA,
+		0xD9, 0x87, 0xD8, 0xAB, 0xD9, 0x85, 0xD8, 0xAB,
+		0xD9, 0x87, 0xD8, 0xB3, 0xD9, 0x85, 0xD8, 0xB3,
+		0xD9, 0x87, 0xD8, 0xB4, 0xD9, 0x85, 0xD8, 0xB4,
+		0xD9, 0x87, 0xD9, 0x83, 0xD9, 0x84, 0xD9, 0x83,
+		0xD9, 0x85, 0xD9, 0x84, 0xD9, 0x85, 0xD9, 0x86,
+		0xD9, 0x85, 0xD9, 0x86, 0xD9, 0x87, 0xD9, 0x8A,
+		0xD9, 0x85, 0xD9, 0x8A, 0xD9, 0x87, 0xD9, 0x80,
+		0xD9, 0x8E, 0xD9, 0x91, 0xD9, 0x80, 0xD9, 0x8F,
+		0xD9, 0x91, 0xD9, 0x80, 0xD9, 0x90, 0xD9, 0x91,
+		0xD8, 0xB7, 0xD9, 0x89, 0xD8, 0xB7, 0xD9, 0x8A,
+		0xD8, 0xB9, 0xD9, 0x89, 0xD8, 0xB9, 0xD9, 0x8A,
+		0xD8, 0xBA, 0xD9, 0x89, 0xD8, 0xBA, 0xD9, 0x8A,
+		0xD8, 0xB3, 0xD9, 0x89, 0xD8, 0xB3, 0xD9, 0x8A,
+		0xD8, 0xB4, 0xD9, 0x89, 0xD8, 0xB4, 0xD9, 0x8A,
+		0xD8, 0xAD, 0xD9, 0x89, 0xD8, 0xAD, 0xD9, 0x8A,
+		0xD8, 0xAC, 0xD9, 0x89, 0xD8, 0xAC, 0xD9, 0x8A,
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+		0x86, 0xD9, 0x86, 0xD9, 0x86, 0xD9, 0x86, 0xD9,
+		0x87, 0xD9, 0x87, 0xD9, 0x87, 0xD9, 0x87, 0xD9,
+		0x88, 0xD9, 0x88, 0xD9, 0x89, 0xD9, 0x89, 0xD9,
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+		0x94, 0xD9, 0x84, 0xD8, 0xA7, 0xD9, 0x94, 0xD9,
+		0x84, 0xD8, 0xA7, 0xD9, 0x95, 0xD9, 0x84, 0xD8,
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+		0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D,
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+		0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D,
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+		0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D,
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+		0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30,
+		0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
+		0x39, 0xF6, 0xE4, 0xB8, 0xBD, 0xF6, 0xE4, 0xB8,
+		0xB8, 0xF6, 0xE4, 0xB9, 0x81, 0xF6, 0xF0, 0xA0,
+		0x84, 0xA2, 0xF6, 0xE4, 0xBD, 0xA0, 0xF6, 0xE4,
+		0xBE, 0xAE, 0xF6, 0xE4, 0xBE, 0xBB, 0xF6, 0xE5,
+		0x80, 0x82, 0xF6, 0xE5, 0x81, 0xBA, 0xF6, 0xE5,
+		0x82, 0x99, 0xF6, 0xE5, 0x83, 0xA7, 0xF6, 0xE5,
+		0x83, 0x8F, 0xF6, 0xE3, 0x92, 0x9E, 0xF6, 0xF0,
+		0xA0, 0x98, 0xBA, 0xF6, 0xE5, 0x85, 0x8D, 0xF6,
+		0xE5, 0x85, 0x94, 0xF6, 0xE5, 0x85, 0xA4, 0xF6,
+		0xE5, 0x85, 0xB7, 0xF6, 0xF0, 0xA0, 0x94, 0x9C,
+		0xF6, 0xE3, 0x92, 0xB9, 0xF6, 0xE5, 0x85, 0xA7,
+		0xF6, 0xE5, 0x86, 0x8D, 0xF6, 0xF0, 0xA0, 0x95,
+		0x8B, 0xF6, 0xE5, 0x86, 0x97, 0xF6, 0xE5, 0x86,
+		0xA4, 0xF6, 0xE4, 0xBB, 0x8C, 0xF6, 0xE5, 0x86,
+		0xAC, 0xF6, 0xE5, 0x86, 0xB5, 0xF6, 0xF0, 0xA9,
+		0x87, 0x9F, 0xF6, 0xE5, 0x87, 0xB5, 0xF6, 0xE5,
+		0x88, 0x83, 0xF6, 0xE3, 0x93, 0x9F, 0xF6, 0xE5,
+		0x88, 0xBB, 0xF6, 0xE5, 0x89, 0x86, 0xF6, 0xE5,
+		0x89, 0xB2, 0xF6, 0xE5, 0x89, 0xB7, 0xF6, 0xE3,
+		0x94, 0x95, 0xF6, 0xE5, 0x8B, 0x87, 0xF6, 0xE5,
+		0x8B, 0x89, 0xF6, 0xE5, 0x8B, 0xA4, 0xF6, 0xE5,
+		0x8B, 0xBA, 0xF6, 0xE5, 0x8C, 0x85, 0xF6, 0xE5,
+		0x8C, 0x86, 0xF6, 0xE5, 0x8C, 0x97, 0xF6, 0xE5,
+		0x8D, 0x89, 0xF6, 0xE5, 0x8D, 0x91, 0xF6, 0xE5,
+		0x8D, 0x9A, 0xF6, 0xE5, 0x8D, 0xB3, 0xF6, 0xE5,
+		0x8D, 0xBD, 0xF6, 0xE5, 0x8D, 0xBF, 0xF6, 0xE5,
+		0x8D, 0xBF, 0xF6, 0xE5, 0x8D, 0xBF, 0xF6, 0xF0,
+		0xA0, 0xA8, 0xAC, 0xF6, 0xE7, 0x81, 0xB0, 0xF6,
+		0xE5, 0x8F, 0x8A, 0xF6, 0xE5, 0x8F, 0x9F, 0xF6,
+		0xF0, 0xA0, 0xAD, 0xA3, 0xF6, 0xE5, 0x8F, 0xAB,
+		0xF6, 0xE5, 0x8F, 0xB1, 0xF6, 0xE5, 0x90, 0x86,
+		0xF6, 0xE5, 0x92, 0x9E, 0xF6, 0xE5, 0x90, 0xB8,
+		0xF6, 0xE5, 0x91, 0x88, 0xF6, 0xE5, 0x91, 0xA8,
+		0xF6, 0xE5, 0x92, 0xA2, 0xF6, 0xE5, 0x93, 0xB6,
+		0xF6, 0xE5, 0x94, 0x90, 0xF6, 0xE5, 0x95, 0x93,
+		0xF6, 0xE5, 0x95, 0xA3, 0xF6, 0xE5, 0x96, 0x84,
+		0xF6, 0xE5, 0x96, 0x84, 0xF6, 0xE5, 0x96, 0x99,
+		0xF6, 0xE5, 0x96, 0xAB, 0xF6, 0xE5, 0x96, 0xB3,
+		0xF6, 0xE5, 0x97, 0x82, 0xF6, 0xE5, 0x9C, 0x96,
+		0xF6, 0xE5, 0x98, 0x86, 0xF6, 0xE5, 0x9C, 0x97,
+		0xF6, 0xE5, 0x99, 0x91, 0xF6, 0xE5, 0x99, 0xB4,
+		0xF6, 0xE5, 0x88, 0x87, 0xF6, 0xE5, 0xA3, 0xAE,
+		0xF6, 0xE5, 0x9F, 0x8E, 0xF6, 0xE5, 0x9F, 0xB4,
+		0xF6, 0xE5, 0xA0, 0x8D, 0xF6, 0xE5, 0x9E, 0x8B,
+		0xF6, 0xE5, 0xA0, 0xB2, 0xF6, 0xE5, 0xA0, 0xB1,
+		0xF6, 0xE5, 0xA2, 0xAC, 0xF6, 0xF0, 0xA1, 0x93,
+		0xA4, 0xF6, 0xE5, 0xA3, 0xB2, 0xF6, 0xE5, 0xA3,
+		0xB7, 0xF6, 0xE5, 0xA4, 0x86, 0xF6, 0xE5, 0xA4,
+		0x9A, 0xF6, 0xE5, 0xA4, 0xA2, 0xF6, 0xE5, 0xA5,
+		0xA2, 0xF6, 0xF0, 0xA1, 0x9A, 0xA8, 0xF6, 0xF0,
+		0xA1, 0x9B, 0xAA, 0xF6, 0xE5, 0xA7, 0xAC, 0xF6,
+		0xE5, 0xA8, 0x9B, 0xF6, 0xE5, 0xA8, 0xA7, 0xF6,
+		0xE5, 0xA7, 0x98, 0xF6, 0xE5, 0xA9, 0xA6, 0xF6,
+		0xE3, 0x9B, 0xAE, 0xF6, 0xE3, 0x9B, 0xBC, 0xF6,
+		0xE5, 0xAC, 0x88, 0xF6, 0xE5, 0xAC, 0xBE, 0xF6,
+		0xE5, 0xAC, 0xBE, 0xF6, 0xF0, 0xA1, 0xA7, 0x88,
+		0xF6, 0xE5, 0xAF, 0x83, 0xF6, 0xE5, 0xAF, 0x98,
+		0xF6, 0xE5, 0xAF, 0xA7, 0xF6, 0xE5, 0xAF, 0xB3,
+		0xF6, 0xF0, 0xA1, 0xAC, 0x98, 0xF6, 0xE5, 0xAF,
+		0xBF, 0xF6, 0xE5, 0xB0, 0x86, 0xF6, 0xE5, 0xBD,
+		0x93, 0xF6, 0xE5, 0xB0, 0xA2, 0xF6, 0xE3, 0x9E,
+		0x81, 0xF6, 0xE5, 0xB1, 0xA0, 0xF6, 0xE5, 0xB1,
+		0xAE, 0xF6, 0xE5, 0xB3, 0x80, 0xF6, 0xE5, 0xB2,
+		0x8D, 0xF6, 0xF0, 0xA1, 0xB7, 0xA4, 0xF6, 0xE5,
+		0xB5, 0x83, 0xF6, 0xF0, 0xA1, 0xB7, 0xA6, 0xF6,
+		0xE5, 0xB5, 0xAE, 0xF6, 0xE5, 0xB5, 0xAB, 0xF6,
+		0xE5, 0xB5, 0xBC, 0xF6, 0xE5, 0xB7, 0xA1, 0xF6,
+		0xE5, 0xB7, 0xA2, 0xF6, 0xE3, 0xA0, 0xAF, 0xF6,
+		0xE5, 0xB7, 0xBD, 0xF6, 0xE5, 0xB8, 0xA8, 0xF6,
+		0xE5, 0xB8, 0xBD, 0xF6, 0xE5, 0xB9, 0xA9, 0xF6,
+		0xE3, 0xA1, 0xA2, 0xF6, 0xF0, 0xA2, 0x86, 0x83,
+		0xF6, 0xE3, 0xA1, 0xBC, 0xF6, 0xE5, 0xBA, 0xB0,
+		0xF6, 0xE5, 0xBA, 0xB3, 0xF6, 0xE5, 0xBA, 0xB6,
+		0xF6, 0xE5, 0xBB, 0x8A, 0xF6, 0xF0, 0xAA, 0x8E,
+		0x92, 0xF6, 0xE5, 0xBB, 0xBE, 0xF6, 0xF0, 0xA2,
+		0x8C, 0xB1, 0xF6, 0xF0, 0xA2, 0x8C, 0xB1, 0xF6,
+		0xE8, 0x88, 0x81, 0xF6, 0xE5, 0xBC, 0xA2, 0xF6,
+		0xE5, 0xBC, 0xA2, 0xF6, 0xE3, 0xA3, 0x87, 0xF6,
+		0xF0, 0xA3, 0x8A, 0xB8, 0xF6, 0xF0, 0xA6, 0x87,
+		0x9A, 0xF6, 0xE5, 0xBD, 0xA2, 0xF6, 0xE5, 0xBD,
+		0xAB, 0xF6, 0xE3, 0xA3, 0xA3, 0xF6, 0xE5, 0xBE,
+		0x9A, 0xF6, 0xE5, 0xBF, 0x8D, 0xF6, 0xE5, 0xBF,
+		0x97, 0xF6, 0xE5, 0xBF, 0xB9, 0xF6, 0xE6, 0x82,
+		0x81, 0xF6, 0xE3, 0xA4, 0xBA, 0xF6, 0xE3, 0xA4,
+		0x9C, 0xF6, 0xE6, 0x82, 0x94, 0xF6, 0xF0, 0xA2,
+		0x9B, 0x94, 0xF6, 0xE6, 0x83, 0x87, 0xF6, 0xE6,
+		0x85, 0x88, 0xF6, 0xE6, 0x85, 0x8C, 0xF6, 0xE6,
+		0x85, 0x8E, 0xF6, 0xE6, 0x85, 0x8C, 0xF6, 0xE6,
+		0x85, 0xBA, 0xF6, 0xE6, 0x86, 0x8E, 0xF6, 0xE6,
+		0x86, 0xB2, 0xF6, 0xE6, 0x86, 0xA4, 0xF6, 0xE6,
+		0x86, 0xAF, 0xF6, 0xE6, 0x87, 0x9E, 0xF6, 0xE6,
+		0x87, 0xB2, 0xF6, 0xE6, 0x87, 0xB6, 0xF6, 0xE6,
+		0x88, 0x90, 0xF6, 0xE6, 0x88, 0x9B, 0xF6, 0xE6,
+		0x89, 0x9D, 0xF6, 0xE6, 0x8A, 0xB1, 0xF6, 0xE6,
+		0x8B, 0x94, 0xF6, 0xE6, 0x8D, 0x90, 0xF6, 0xF0,
+		0xA2, 0xAC, 0x8C, 0xF6, 0xE6, 0x8C, 0xBD, 0xF6,
+		0xE6, 0x8B, 0xBC, 0xF6, 0xE6, 0x8D, 0xA8, 0xF6,
+		0xE6, 0x8E, 0x83, 0xF6, 0xE6, 0x8F, 0xA4, 0xF6,
+		0xF0, 0xA2, 0xAF, 0xB1, 0xF6, 0xE6, 0x90, 0xA2,
+		0xF6, 0xE6, 0x8F, 0x85, 0xF6, 0xE6, 0x8E, 0xA9,
+		0xF6, 0xE3, 0xA8, 0xAE, 0xF6, 0xE6, 0x91, 0xA9,
+		0xF6, 0xE6, 0x91, 0xBE, 0xF6, 0xE6, 0x92, 0x9D,
+		0xF6, 0xE6, 0x91, 0xB7, 0xF6, 0xE3, 0xA9, 0xAC,
+		0xF6, 0xE6, 0x95, 0x8F, 0xF6, 0xE6, 0x95, 0xAC,
+		0xF6, 0xF0, 0xA3, 0x80, 0x8A, 0xF6, 0xE6, 0x97,
+		0xA3, 0xF6, 0xE6, 0x9B, 0xB8, 0xF6, 0xE6, 0x99,
+		0x89, 0xF6, 0xE3, 0xAC, 0x99, 0xF6, 0xE6, 0x9A,
+		0x91, 0xF6, 0xE3, 0xAC, 0x88, 0xF6, 0xE3, 0xAB,
+		0xA4, 0xF6, 0xE5, 0x86, 0x92, 0xF6, 0xE5, 0x86,
+		0x95, 0xF6, 0xE6, 0x9C, 0x80, 0xF6, 0xE6, 0x9A,
+		0x9C, 0xF6, 0xE8, 0x82, 0xAD, 0xF6, 0xE4, 0x8F,
+		0x99, 0xF6, 0xE6, 0x9C, 0x97, 0xF6, 0xE6, 0x9C,
+		0x9B, 0xF6, 0xE6, 0x9C, 0xA1, 0xF6, 0xE6, 0x9D,
+		0x9E, 0xF6, 0xE6, 0x9D, 0x93, 0xF6, 0xF0, 0xA3,
+		0x8F, 0x83, 0xF6, 0xE3, 0xAD, 0x89, 0xF6, 0xE6,
+		0x9F, 0xBA, 0xF6, 0xE6, 0x9E, 0x85, 0xF6, 0xE6,
+		0xA1, 0x92, 0xF6, 0xE6, 0xA2, 0x85, 0xF6, 0xF0,
+		0xA3, 0x91, 0xAD, 0xF6, 0xE6, 0xA2, 0x8E, 0xF6,
+		0xE6, 0xA0, 0x9F, 0xF6, 0xE6, 0xA4, 0x94, 0xF6,
+		0xE3, 0xAE, 0x9D, 0xF6, 0xE6, 0xA5, 0x82, 0xF6,
+		0xE6, 0xA6, 0xA3, 0xF6, 0xE6, 0xA7, 0xAA, 0xF6,
+		0xE6, 0xAA, 0xA8, 0xF6, 0xF0, 0xA3, 0x9A, 0xA3,
+		0xF6, 0xE6, 0xAB, 0x9B, 0xF6, 0xE3, 0xB0, 0x98,
+		0xF6, 0xE6, 0xAC, 0xA1, 0xF6, 0xF0, 0xA3, 0xA2,
+		0xA7, 0xF6, 0xE6, 0xAD, 0x94, 0xF6, 0xE3, 0xB1,
+		0x8E, 0xF6, 0xE6, 0xAD, 0xB2, 0xF6, 0xE6, 0xAE,
+		0x9F, 0xF6, 0xE6, 0xAE, 0xBA, 0xF6, 0xE6, 0xAE,
+		0xBB, 0xF6, 0xF0, 0xA3, 0xAA, 0x8D, 0xF6, 0xF0,
+		0xA1, 0xB4, 0x8B, 0xF6, 0xF0, 0xA3, 0xAB, 0xBA,
+		0xF6, 0xE6, 0xB1, 0x8E, 0xF6, 0xF0, 0xA3, 0xB2,
+		0xBC, 0xF6, 0xE6, 0xB2, 0xBF, 0xF6, 0xE6, 0xB3,
+		0x8D, 0xF6, 0xE6, 0xB1, 0xA7, 0xF6, 0xE6, 0xB4,
+		0x96, 0xF6, 0xE6, 0xB4, 0xBE, 0xF6, 0xE6, 0xB5,
+		0xB7, 0xF6, 0xE6, 0xB5, 0x81, 0xF6, 0xE6, 0xB5,
+		0xA9, 0xF6, 0xE6, 0xB5, 0xB8, 0xF6, 0xE6, 0xB6,
+		0x85, 0xF6, 0xF0, 0xA3, 0xB4, 0x9E, 0xF6, 0xE6,
+		0xB4, 0xB4, 0xF6, 0xE6, 0xB8, 0xAF, 0xF6, 0xE6,
+		0xB9, 0xAE, 0xF6, 0xE3, 0xB4, 0xB3, 0xF6, 0xE6,
+		0xBB, 0x8B, 0xF6, 0xE6, 0xBB, 0x87, 0xF6, 0xF0,
+		0xA3, 0xBB, 0x91, 0xF6, 0xE6, 0xB7, 0xB9, 0xF6,
+		0xE6, 0xBD, 0xAE, 0xF6, 0xF0, 0xA3, 0xBD, 0x9E,
+		0xF6, 0xF0, 0xA3, 0xBE, 0x8E, 0xF6, 0xE6, 0xBF,
+		0x86, 0xF6, 0xE7, 0x80, 0xB9, 0xF6, 0xE7, 0x80,
+		0x9E, 0xF6, 0xE7, 0x80, 0x9B, 0xF6, 0xE3, 0xB6,
+		0x96, 0xF6, 0xE7, 0x81, 0x8A, 0xF6, 0xE7, 0x81,
+		0xBD, 0xF6, 0xE7, 0x81, 0xB7, 0xF6, 0xE7, 0x82,
+		0xAD, 0xF6, 0xF0, 0xA0, 0x94, 0xA5, 0xF6, 0xE7,
+		0x85, 0x85, 0xF6, 0xF0, 0xA4, 0x89, 0xA3, 0xF6,
+		0xE7, 0x86, 0x9C, 0xF6, 0xF0, 0xA4, 0x8E, 0xAB,
+		0xF6, 0xE7, 0x88, 0xA8, 0xF6, 0xE7, 0x88, 0xB5,
+		0xF6, 0xE7, 0x89, 0x90, 0xF6, 0xF0, 0xA4, 0x98,
+		0x88, 0xF6, 0xE7, 0x8A, 0x80, 0xF6, 0xE7, 0x8A,
+		0x95, 0xF6, 0xF0, 0xA4, 0x9C, 0xB5, 0xF6, 0xF0,
+		0xA4, 0xA0, 0x94, 0xF6, 0xE7, 0x8D, 0xBA, 0xF6,
+		0xE7, 0x8E, 0x8B, 0xF6, 0xE3, 0xBA, 0xAC, 0xF6,
+		0xE7, 0x8E, 0xA5, 0xF6, 0xE3, 0xBA, 0xB8, 0xF6,
+		0xE3, 0xBA, 0xB8, 0xF6, 0xE7, 0x91, 0x87, 0xF6,
+		0xE7, 0x91, 0x9C, 0xF6, 0xE7, 0x91, 0xB1, 0xF6,
+		0xE7, 0x92, 0x85, 0xF6, 0xE7, 0x93, 0x8A, 0xF6,
+		0xE3, 0xBC, 0x9B, 0xF6, 0xE7, 0x94, 0xA4, 0xF6,
+		0xF0, 0xA4, 0xB0, 0xB6, 0xF6, 0xE7, 0x94, 0xBE,
+		0xF6, 0xF0, 0xA4, 0xB2, 0x92, 0xF6, 0xE7, 0x95,
+		0xB0, 0xF6, 0xF0, 0xA2, 0x86, 0x9F, 0xF6, 0xE7,
+		0x98, 0x90, 0xF6, 0xF0, 0xA4, 0xBE, 0xA1, 0xF6,
+		0xF0, 0xA4, 0xBE, 0xB8, 0xF6, 0xF0, 0xA5, 0x81,
+		0x84, 0xF6, 0xE3, 0xBF, 0xBC, 0xF6, 0xE4, 0x80,
+		0x88, 0xF6, 0xE7, 0x9B, 0xB4, 0xF6, 0xF0, 0xA5,
+		0x83, 0xB3, 0xF6, 0xF0, 0xA5, 0x83, 0xB2, 0xF6,
+		0xF0, 0xA5, 0x84, 0x99, 0xF6, 0xF0, 0xA5, 0x84,
+		0xB3, 0xF6, 0xE7, 0x9C, 0x9E, 0xF6, 0xE7, 0x9C,
+		0x9F, 0xF6, 0xE7, 0x9C, 0x9F, 0xF6, 0xE7, 0x9D,
+		0x8A, 0xF6, 0xE4, 0x80, 0xB9, 0xF6, 0xE7, 0x9E,
+		0x8B, 0xF6, 0xE4, 0x81, 0x86, 0xF6, 0xE4, 0x82,
+		0x96, 0xF6, 0xF0, 0xA5, 0x90, 0x9D, 0xF6, 0xE7,
+		0xA1, 0x8E, 0xF6, 0xE7, 0xA2, 0x8C, 0xF6, 0xE7,
+		0xA3, 0x8C, 0xF6, 0xE4, 0x83, 0xA3, 0xF6, 0xF0,
+		0xA5, 0x98, 0xA6, 0xF6, 0xE7, 0xA5, 0x96, 0xF6,
+		0xF0, 0xA5, 0x9A, 0x9A, 0xF6, 0xF0, 0xA5, 0x9B,
+		0x85, 0xF6, 0xE7, 0xA6, 0x8F, 0xF6, 0xE7, 0xA7,
+		0xAB, 0xF6, 0xE4, 0x84, 0xAF, 0xF6, 0xE7, 0xA9,
+		0x80, 0xF6, 0xE7, 0xA9, 0x8A, 0xF6, 0xE7, 0xA9,
+		0x8F, 0xF6, 0xF0, 0xA5, 0xA5, 0xBC, 0xF6, 0xF0,
+		0xA5, 0xAA, 0xA7, 0xF6, 0xF0, 0xA5, 0xAA, 0xA7,
+		0xF6, 0xE7, 0xAB, 0xAE, 0xF6, 0xE4, 0x88, 0x82,
+		0xF6, 0xF0, 0xA5, 0xAE, 0xAB, 0xF6, 0xE7, 0xAF,
+		0x86, 0xF6, 0xE7, 0xAF, 0x89, 0xF6, 0xE4, 0x88,
+		0xA7, 0xF6, 0xF0, 0xA5, 0xB2, 0x80, 0xF6, 0xE7,
+		0xB3, 0x92, 0xF6, 0xE4, 0x8A, 0xA0, 0xF6, 0xE7,
+		0xB3, 0xA8, 0xF6, 0xE7, 0xB3, 0xA3, 0xF6, 0xE7,
+		0xB4, 0x80, 0xF6, 0xF0, 0xA5, 0xBE, 0x86, 0xF6,
+		0xE7, 0xB5, 0xA3, 0xF6, 0xE4, 0x8C, 0x81, 0xF6,
+		0xE7, 0xB7, 0x87, 0xF6, 0xE7, 0xB8, 0x82, 0xF6,
+		0xE7, 0xB9, 0x85, 0xF6, 0xE4, 0x8C, 0xB4, 0xF6,
+		0xF0, 0xA6, 0x88, 0xA8, 0xF6, 0xF0, 0xA6, 0x89,
+		0x87, 0xF6, 0xE4, 0x8D, 0x99, 0xF6, 0xF0, 0xA6,
+		0x8B, 0x99, 0xF6, 0xE7, 0xBD, 0xBA, 0xF6, 0xF0,
+		0xA6, 0x8C, 0xBE, 0xF6, 0xE7, 0xBE, 0x95, 0xF6,
+		0xE7, 0xBF, 0xBA, 0xF6, 0xE8, 0x80, 0x85, 0xF6,
+		0xF0, 0xA6, 0x93, 0x9A, 0xF6, 0xF0, 0xA6, 0x94,
+		0xA3, 0xF6, 0xE8, 0x81, 0xA0, 0xF6, 0xF0, 0xA6,
+		0x96, 0xA8, 0xF6, 0xE8, 0x81, 0xB0, 0xF6, 0xF0,
+		0xA3, 0x8D, 0x9F, 0xF6, 0xE4, 0x8F, 0x95, 0xF6,
+		0xE8, 0x82, 0xB2, 0xF6, 0xE8, 0x84, 0x83, 0xF6,
+		0xE4, 0x90, 0x8B, 0xF6, 0xE8, 0x84, 0xBE, 0xF6,
+		0xE5, 0xAA, 0xB5, 0xF6, 0xF0, 0xA6, 0x9E, 0xA7,
+		0xF6, 0xF0, 0xA6, 0x9E, 0xB5, 0xF6, 0xF0, 0xA3,
+		0x8E, 0x93, 0xF6, 0xF0, 0xA3, 0x8E, 0x9C, 0xF6,
+		0xE8, 0x88, 0x81, 0xF6, 0xE8, 0x88, 0x84, 0xF6,
+		0xE8, 0xBE, 0x9E, 0xF6, 0xE4, 0x91, 0xAB, 0xF6,
+		0xE8, 0x8A, 0x91, 0xF6, 0xE8, 0x8A, 0x8B, 0xF6,
+		0xE8, 0x8A, 0x9D, 0xF6, 0xE5, 0x8A, 0xB3, 0xF6,
+		0xE8, 0x8A, 0xB1, 0xF6, 0xE8, 0x8A, 0xB3, 0xF6,
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+		0x81, 0xF6, 0xD0, 0x86, 0xCC, 0x88, 0xF6, 0xD0,
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+		0xCC, 0x86, 0xF6, 0xD0, 0xB8, 0xCC, 0x86, 0xF6,
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+		0x88, 0xF6, 0xD0, 0xB3, 0xCC, 0x81, 0xF6, 0xD1,
+		0x96, 0xCC, 0x88, 0xF6, 0xD0, 0xBA, 0xCC, 0x81,
+		0xF6, 0xD0, 0xB8, 0xCC, 0x80, 0xF6, 0xD1, 0x83,
+		0xCC, 0x86, 0xF6, 0xD1, 0xB4, 0xCC, 0x8F, 0xF6,
+		0xD1, 0xB5, 0xCC, 0x8F, 0xF6, 0xD0, 0x96, 0xCC,
+		0x86, 0xF6, 0xD0, 0xB6, 0xCC, 0x86, 0xF6, 0xD0,
+		0x90, 0xCC, 0x86, 0xF6, 0xD0, 0xB0, 0xCC, 0x86,
+		0xF6, 0xD0, 0x90, 0xCC, 0x88, 0xF6, 0xD0, 0xB0,
+		0xCC, 0x88, 0xF6, 0xD0, 0x95, 0xCC, 0x86, 0xF6,
+		0xD0, 0xB5, 0xCC, 0x86, 0xF6, 0xD3, 0x98, 0xCC,
+		0x88, 0xF6, 0xD3, 0x99, 0xCC, 0x88, 0xF6, 0xD0,
+		0x96, 0xCC, 0x88, 0xF6, 0xD0, 0xB6, 0xCC, 0x88,
+		0xF6, 0xD0, 0x97, 0xCC, 0x88, 0xF6, 0xD0, 0xB7,
+		0xCC, 0x88, 0xF6, 0xD0, 0x98, 0xCC, 0x84, 0xF6,
+		0xD0, 0xB8, 0xCC, 0x84, 0xF6, 0xD0, 0x98, 0xCC,
+		0x88, 0xF6, 0xD0, 0xB8, 0xCC, 0x88, 0xF6, 0xD0,
+		0x9E, 0xCC, 0x88, 0xF6, 0xD0, 0xBE, 0xCC, 0x88,
+		0xF6, 0xD3, 0xA8, 0xCC, 0x88, 0xF6, 0xD3, 0xA9,
+		0xCC, 0x88, 0xF6, 0xD0, 0xAD, 0xCC, 0x88, 0xF6,
+		0xD1, 0x8D, 0xCC, 0x88, 0xF6, 0xD0, 0xA3, 0xCC,
+		0x84, 0xF6, 0xD1, 0x83, 0xCC, 0x84, 0xF6, 0xD0,
+		0xA3, 0xCC, 0x88, 0xF6, 0xD1, 0x83, 0xCC, 0x88,
+		0xF6, 0xD0, 0xA3, 0xCC, 0x8B, 0xF6, 0xD1, 0x83,
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+		0x88, 0xF6, 0xD1, 0x8B, 0xCC, 0x88, 0xD5, 0xA5,
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+		0x94, 0xF6, 0xD8, 0xA7, 0xD9, 0x95, 0xF6, 0xD9,
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+		0x88, 0xD9, 0xB4, 0xDB, 0x87, 0xD9, 0xB4, 0xD9,
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+		0xF6, 0xDB, 0x81, 0xD9, 0x94, 0xF6, 0xDB, 0x92,
+		0xD9, 0x94, 0xF6, 0xE0, 0xA4, 0xA8, 0xE0, 0xA4,
+		0xBC, 0xF6, 0xE0, 0xA4, 0xB0, 0xE0, 0xA4, 0xBC,
+		0xF6, 0xE0, 0xA4, 0xB3, 0xE0, 0xA4, 0xBC, 0xF6,
+		0xE0, 0xA4, 0x95, 0xE0, 0xA4, 0xBC, 0xF6, 0xE0,
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+		0x97, 0xE0, 0xA4, 0xBC, 0xF6, 0xE0, 0xA4, 0x9C,
+		0xE0, 0xA4, 0xBC, 0xF6, 0xE0, 0xA4, 0xA1, 0xE0,
+		0xA4, 0xBC, 0xF6, 0xE0, 0xA4, 0xA2, 0xE0, 0xA4,
+		0xBC, 0xF6, 0xE0, 0xA4, 0xAB, 0xE0, 0xA4, 0xBC,
+		0xF6, 0xE0, 0xA4, 0xAF, 0xE0, 0xA4, 0xBC, 0xF6,
+		0xE0, 0xA7, 0x87, 0xE0, 0xA6, 0xBE, 0xF6, 0xE0,
+		0xA7, 0x87, 0xE0, 0xA7, 0x97, 0xF6, 0xE0, 0xA6,
+		0xA1, 0xE0, 0xA6, 0xBC, 0xF6, 0xE0, 0xA6, 0xA2,
+		0xE0, 0xA6, 0xBC, 0xF6, 0xE0, 0xA6, 0xAF, 0xE0,
+		0xA6, 0xBC, 0xF6, 0xE0, 0xA8, 0xB2, 0xE0, 0xA8,
+		0xBC, 0xF6, 0xE0, 0xA8, 0xB8, 0xE0, 0xA8, 0xBC,
+		0xF6, 0xE0, 0xA8, 0x96, 0xE0, 0xA8, 0xBC, 0xF6,
+		0xE0, 0xA8, 0x97, 0xE0, 0xA8, 0xBC, 0xF6, 0xE0,
+		0xA8, 0x9C, 0xE0, 0xA8, 0xBC, 0xF6, 0xE0, 0xA8,
+		0xAB, 0xE0, 0xA8, 0xBC, 0xF6, 0xE0, 0xAD, 0x87,
+		0xE0, 0xAD, 0x96, 0xF6, 0xE0, 0xAD, 0x87, 0xE0,
+		0xAC, 0xBE, 0xF6, 0xE0, 0xAD, 0x87, 0xE0, 0xAD,
+		0x97, 0xF6, 0xE0, 0xAC, 0xA1, 0xE0, 0xAC, 0xBC,
+		0xF6, 0xE0, 0xAC, 0xA2, 0xE0, 0xAC, 0xBC, 0xF6,
+		0xE0, 0xAE, 0x92, 0xE0, 0xAF, 0x97, 0xF6, 0xE0,
+		0xAF, 0x86, 0xE0, 0xAE, 0xBE, 0xF6, 0xE0, 0xAF,
+		0x87, 0xE0, 0xAE, 0xBE, 0xF6, 0xE0, 0xAF, 0x86,
+		0xE0, 0xAF, 0x97, 0xF6, 0xE0, 0xB1, 0x86, 0xE0,
+		0xB1, 0x96, 0xF6, 0xE0, 0xB2, 0xBF, 0xE0, 0xB3,
+		0x95, 0xF6, 0xE0, 0xB3, 0x86, 0xE0, 0xB3, 0x95,
+		0xF6, 0xE0, 0xB3, 0x86, 0xE0, 0xB3, 0x96, 0xF6,
+		0xE0, 0xB3, 0x86, 0xE0, 0xB3, 0x82, 0xF6, 0xE0,
+		0xB3, 0x86, 0xE0, 0xB3, 0x82, 0xE0, 0xB3, 0x95,
+		0xF6, 0xE0, 0xB5, 0x86, 0xE0, 0xB4, 0xBE, 0xF6,
+		0xE0, 0xB5, 0x87, 0xE0, 0xB4, 0xBE, 0xF6, 0xE0,
+		0xB5, 0x86, 0xE0, 0xB5, 0x97, 0xF6, 0xE0, 0xB7,
+		0x99, 0xE0, 0xB7, 0x8A, 0xF6, 0xE0, 0xB7, 0x99,
+		0xE0, 0xB7, 0x8F, 0xF6, 0xE0, 0xB7, 0x99, 0xE0,
+		0xB7, 0x8F, 0xE0, 0xB7, 0x8A, 0xF6, 0xE0, 0xB7,
+		0x99, 0xE0, 0xB7, 0x9F, 0xE0, 0xB9, 0x8D, 0xE0,
+		0xB8, 0xB2, 0xE0, 0xBB, 0x8D, 0xE0, 0xBA, 0xB2,
+		0xE0, 0xBA, 0xAB, 0xE0, 0xBA, 0x99, 0xE0, 0xBA,
+		0xAB, 0xE0, 0xBA, 0xA1, 0xE0, 0xBC, 0x8B, 0xF6,
+		0xE0, 0xBD, 0x82, 0xE0, 0xBE, 0xB7, 0xF6, 0xE0,
+		0xBD, 0x8C, 0xE0, 0xBE, 0xB7, 0xF6, 0xE0, 0xBD,
+		0x91, 0xE0, 0xBE, 0xB7, 0xF6, 0xE0, 0xBD, 0x96,
+		0xE0, 0xBE, 0xB7, 0xF6, 0xE0, 0xBD, 0x9B, 0xE0,
+		0xBE, 0xB7, 0xF6, 0xE0, 0xBD, 0x80, 0xE0, 0xBE,
+		0xB5, 0xF6, 0xE0, 0xBD, 0xB1, 0xE0, 0xBD, 0xB2,
+		0xF6, 0xE0, 0xBD, 0xB1, 0xE0, 0xBD, 0xB4, 0xF6,
+		0xE0, 0xBE, 0xB2, 0xE0, 0xBE, 0x80, 0xE0, 0xBE,
+		0xB2, 0xE0, 0xBD, 0xB1, 0xE0, 0xBE, 0x80, 0xF6,
+		0xE0, 0xBE, 0xB3, 0xE0, 0xBE, 0x80, 0xE0, 0xBE,
+		0xB3, 0xE0, 0xBD, 0xB1, 0xE0, 0xBE, 0x80, 0xF6,
+		0xE0, 0xBD, 0xB1, 0xE0, 0xBE, 0x80, 0xF6, 0xE0,
+		0xBE, 0x92, 0xE0, 0xBE, 0xB7, 0xF6, 0xE0, 0xBE,
+		0x9C, 0xE0, 0xBE, 0xB7, 0xF6, 0xE0, 0xBE, 0xA1,
+		0xE0, 0xBE, 0xB7, 0xF6, 0xE0, 0xBE, 0xA6, 0xE0,
+		0xBE, 0xB7, 0xF6, 0xE0, 0xBE, 0xAB, 0xE0, 0xBE,
+		0xB7, 0xF6, 0xE0, 0xBE, 0x90, 0xE0, 0xBE, 0xB5,
+		0xF6, 0xE1, 0x80, 0xA5, 0xE1, 0x80, 0xAE, 0xE1,
+		0x83, 0x9C, 0xF6, 0xE1, 0xAC, 0x85, 0xE1, 0xAC,
+		0xB5, 0xF6, 0xE1, 0xAC, 0x87, 0xE1, 0xAC, 0xB5,
+		0xF6, 0xE1, 0xAC, 0x89, 0xE1, 0xAC, 0xB5, 0xF6,
+		0xE1, 0xAC, 0x8B, 0xE1, 0xAC, 0xB5, 0xF6, 0xE1,
+		0xAC, 0x8D, 0xE1, 0xAC, 0xB5, 0xF6, 0xE1, 0xAC,
+		0x91, 0xE1, 0xAC, 0xB5, 0xF6, 0xE1, 0xAC, 0xBA,
+		0xE1, 0xAC, 0xB5, 0xF6, 0xE1, 0xAC, 0xBC, 0xE1,
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+		0x83, 0xA1, 0xF6, 0xE4, 0xBA, 0x86, 0xF6, 0xE5,
+		0x83, 0x9A, 0xF6, 0xE5, 0xAF, 0xAE, 0xF6, 0xE5,
+		0xB0, 0xBF, 0xF6, 0xE6, 0x96, 0x99, 0xF6, 0xE6,
+		0xA8, 0x82, 0xF6, 0xE7, 0x87, 0x8E, 0xF6, 0xE7,
+		0x99, 0x82, 0xF6, 0xE8, 0x93, 0xBC, 0xF6, 0xE9,
+		0x81, 0xBC, 0xF6, 0xE9, 0xBE, 0x8D, 0xF6, 0xE6,
+		0x9A, 0x88, 0xF6, 0xE9, 0x98, 0xAE, 0xF6, 0xE5,
+		0x8A, 0x89, 0xF6, 0xE6, 0x9D, 0xBB, 0xF6, 0xE6,
+		0x9F, 0xB3, 0xF6, 0xE6, 0xB5, 0x81, 0xF6, 0xE6,
+		0xBA, 0x9C, 0xF6, 0xE7, 0x90, 0x89, 0xF6, 0xE7,
+		0x95, 0x99, 0xF6, 0xE7, 0xA1, 0xAB, 0xF6, 0xE7,
+		0xB4, 0x90, 0xF6, 0xE9, 0xA1, 0x9E, 0xF6, 0xE5,
+		0x85, 0xAD, 0xF6, 0xE6, 0x88, 0xAE, 0xF6, 0xE9,
+		0x99, 0xB8, 0xF6, 0xE5, 0x80, 0xAB, 0xF6, 0xE5,
+		0xB4, 0x99, 0xF6, 0xE6, 0xB7, 0xAA, 0xF6, 0xE8,
+		0xBC, 0xAA, 0xF6, 0xE5, 0xBE, 0x8B, 0xF6, 0xE6,
+		0x85, 0x84, 0xF6, 0xE6, 0xA0, 0x97, 0xF6, 0xE7,
+		0x8E, 0x87, 0xF6, 0xE9, 0x9A, 0x86, 0xF6, 0xE5,
+		0x88, 0xA9, 0xF6, 0xE5, 0x90, 0x8F, 0xF6, 0xE5,
+		0xB1, 0xA5, 0xF6, 0xE6, 0x98, 0x93, 0xF6, 0xE6,
+		0x9D, 0x8E, 0xF6, 0xE6, 0xA2, 0xA8, 0xF6, 0xE6,
+		0xB3, 0xA5, 0xF6, 0xE7, 0x90, 0x86, 0xF6, 0xE7,
+		0x97, 0xA2, 0xF6, 0xE7, 0xBD, 0xB9, 0xF6, 0xE8,
+		0xA3, 0x8F, 0xF6, 0xE8, 0xA3, 0xA1, 0xF6, 0xE9,
+		0x87, 0x8C, 0xF6, 0xE9, 0x9B, 0xA2, 0xF6, 0xE5,
+		0x8C, 0xBF, 0xF6, 0xE6, 0xBA, 0xBA, 0xF6, 0xE5,
+		0x90, 0x9D, 0xF6, 0xE7, 0x87, 0x90, 0xF6, 0xE7,
+		0x92, 0x98, 0xF6, 0xE8, 0x97, 0xBA, 0xF6, 0xE9,
+		0x9A, 0xA3, 0xF6, 0xE9, 0xB1, 0x97, 0xF6, 0xE9,
+		0xBA, 0x9F, 0xF6, 0xE6, 0x9E, 0x97, 0xF6, 0xE6,
+		0xB7, 0x8B, 0xF6, 0xE8, 0x87, 0xA8, 0xF6, 0xE7,
+		0xAB, 0x8B, 0xF6, 0xE7, 0xAC, 0xA0, 0xF6, 0xE7,
+		0xB2, 0x92, 0xF6, 0xE7, 0x8B, 0x80, 0xF6, 0xE7,
+		0x82, 0x99, 0xF6, 0xE8, 0xAD, 0x98, 0xF6, 0xE4,
+		0xBB, 0x80, 0xF6, 0xE8, 0x8C, 0xB6, 0xF6, 0xE5,
+		0x88, 0xBA, 0xF6, 0xE5, 0x88, 0x87, 0xF6, 0xE5,
+		0xBA, 0xA6, 0xF6, 0xE6, 0x8B, 0x93, 0xF6, 0xE7,
+		0xB3, 0x96, 0xF6, 0xE5, 0xAE, 0x85, 0xF6, 0xE6,
+		0xB4, 0x9E, 0xF6, 0xE6, 0x9A, 0xB4, 0xF6, 0xE8,
+		0xBC, 0xBB, 0xF6, 0xE8, 0xA1, 0x8C, 0xF6, 0xE9,
+		0x99, 0x8D, 0xF6, 0xE8, 0xA6, 0x8B, 0xF6, 0xE5,
+		0xBB, 0x93, 0xF6, 0xE5, 0x85, 0x80, 0xF6, 0xE5,
+		0x97, 0x80, 0xF6, 0xE5, 0xA1, 0x9A, 0xF6, 0xE6,
+		0x99, 0xB4, 0xF6, 0xE5, 0x87, 0x9E, 0xF6, 0xE7,
+		0x8C, 0xAA, 0xF6, 0xE7, 0x9B, 0x8A, 0xF6, 0xE7,
+		0xA4, 0xBC, 0xF6, 0xE7, 0xA5, 0x9E, 0xF6, 0xE7,
+		0xA5, 0xA5, 0xF6, 0xE7, 0xA6, 0x8F, 0xF6, 0xE9,
+		0x9D, 0x96, 0xF6, 0xE7, 0xB2, 0xBE, 0xF6, 0xE7,
+		0xBE, 0xBD, 0xF6, 0xE8, 0x98, 0x92, 0xF6, 0xE8,
+		0xAB, 0xB8, 0xF6, 0xE9, 0x80, 0xB8, 0xF6, 0xE9,
+		0x83, 0xBD, 0xF6, 0xE9, 0xA3, 0xAF, 0xF6, 0xE9,
+		0xA3, 0xBC, 0xF6, 0xE9, 0xA4, 0xA8, 0xF6, 0xE9,
+		0xB6, 0xB4, 0xF6, 0xE4, 0xBE, 0xAE, 0xF6, 0xE5,
+		0x83, 0xA7, 0xF6, 0xE5, 0x85, 0x8D, 0xF6, 0xE5,
+		0x8B, 0x89, 0xF6, 0xE5, 0x8B, 0xA4, 0xF6, 0xE5,
+		0x8D, 0x91, 0xF6, 0xE5, 0x96, 0x9D, 0xF6, 0xE5,
+		0x98, 0x86, 0xF6, 0xE5, 0x99, 0xA8, 0xF6, 0xE5,
+		0xA1, 0x80, 0xF6, 0xE5, 0xA2, 0xA8, 0xF6, 0xE5,
+		0xB1, 0xA4, 0xF6, 0xE5, 0xB1, 0xAE, 0xF6, 0xE6,
+		0x82, 0x94, 0xF6, 0xE6, 0x85, 0xA8, 0xF6, 0xE6,
+		0x86, 0x8E, 0xF6, 0xE6, 0x87, 0xB2, 0xF6, 0xE6,
+		0x95, 0x8F, 0xF6, 0xE6, 0x97, 0xA2, 0xF6, 0xE6,
+		0x9A, 0x91, 0xF6, 0xE6, 0xA2, 0x85, 0xF6, 0xE6,
+		0xB5, 0xB7, 0xF6, 0xE6, 0xB8, 0x9A, 0xF6, 0xE6,
+		0xBC, 0xA2, 0xF6, 0xE7, 0x85, 0xAE, 0xF6, 0xE7,
+		0x88, 0xAB, 0xF6, 0xE7, 0x90, 0xA2, 0xF6, 0xE7,
+		0xA2, 0x91, 0xF6, 0xE7, 0xA4, 0xBE, 0xF6, 0xE7,
+		0xA5, 0x89, 0xF6, 0xE7, 0xA5, 0x88, 0xF6, 0xE7,
+		0xA5, 0x90, 0xF6, 0xE7, 0xA5, 0x96, 0xF6, 0xE7,
+		0xA5, 0x9D, 0xF6, 0xE7, 0xA6, 0x8D, 0xF6, 0xE7,
+		0xA6, 0x8E, 0xF6, 0xE7, 0xA9, 0x80, 0xF6, 0xE7,
+		0xAA, 0x81, 0xF6, 0xE7, 0xAF, 0x80, 0xF6, 0xE7,
+		0xB7, 0xB4, 0xF6, 0xE7, 0xB8, 0x89, 0xF6, 0xE7,
+		0xB9, 0x81, 0xF6, 0xE7, 0xBD, 0xB2, 0xF6, 0xE8,
+		0x80, 0x85, 0xF6, 0xE8, 0x87, 0xAD, 0xF6, 0xE8,
+		0x89, 0xB9, 0xF6, 0xE8, 0x89, 0xB9, 0xF6, 0xE8,
+		0x91, 0x97, 0xF6, 0xE8, 0xA4, 0x90, 0xF6, 0xE8,
+		0xA6, 0x96, 0xF6, 0xE8, 0xAC, 0x81, 0xF6, 0xE8,
+		0xAC, 0xB9, 0xF6, 0xE8, 0xB3, 0x93, 0xF6, 0xE8,
+		0xB4, 0x88, 0xF6, 0xE8, 0xBE, 0xB6, 0xF6, 0xE9,
+		0x80, 0xB8, 0xF6, 0xE9, 0x9B, 0xA3, 0xF6, 0xE9,
+		0x9F, 0xBF, 0xF6, 0xE9, 0xA0, 0xBB, 0xF6, 0xE4,
+		0xB8, 0xA6, 0xF6, 0xE5, 0x86, 0xB5, 0xF6, 0xE5,
+		0x85, 0xA8, 0xF6, 0xE4, 0xBE, 0x80, 0xF6, 0xE5,
+		0x85, 0x85, 0xF6, 0xE5, 0x86, 0x80, 0xF6, 0xE5,
+		0x8B, 0x87, 0xF6, 0xE5, 0x8B, 0xBA, 0xF6, 0xE5,
+		0x96, 0x9D, 0xF6, 0xE5, 0x95, 0x95, 0xF6, 0xE5,
+		0x96, 0x99, 0xF6, 0xE5, 0x97, 0xA2, 0xF6, 0xE5,
+		0xA1, 0x9A, 0xF6, 0xE5, 0xA2, 0xB3, 0xF6, 0xE5,
+		0xA5, 0x84, 0xF6, 0xE5, 0xA5, 0x94, 0xF6, 0xE5,
+		0xA9, 0xA2, 0xF6, 0xE5, 0xAC, 0xA8, 0xF6, 0xE5,
+		0xBB, 0x92, 0xF6, 0xE5, 0xBB, 0x99, 0xF6, 0xE5,
+		0xBD, 0xA9, 0xF6, 0xE5, 0xBE, 0xAD, 0xF6, 0xE6,
+		0x83, 0x98, 0xF6, 0xE6, 0x85, 0x8E, 0xF6, 0xE6,
+		0x84, 0x88, 0xF6, 0xE6, 0x86, 0x8E, 0xF6, 0xE6,
+		0x85, 0xA0, 0xF6, 0xE6, 0x87, 0xB2, 0xF6, 0xE6,
+		0x88, 0xB4, 0xF6, 0xE6, 0x8F, 0x84, 0xF6, 0xE6,
+		0x90, 0x9C, 0xF6, 0xE6, 0x91, 0x92, 0xF6, 0xE6,
+		0x95, 0x96, 0xF6, 0xE6, 0x99, 0xB4, 0xF6, 0xE6,
+		0x9C, 0x97, 0xF6, 0xE6, 0x9C, 0x9B, 0xF6, 0xE6,
+		0x9D, 0x96, 0xF6, 0xE6, 0xAD, 0xB9, 0xF6, 0xE6,
+		0xAE, 0xBA, 0xF6, 0xE6, 0xB5, 0x81, 0xF6, 0xE6,
+		0xBB, 0x9B, 0xF6, 0xE6, 0xBB, 0x8B, 0xF6, 0xE6,
+		0xBC, 0xA2, 0xF6, 0xE7, 0x80, 0x9E, 0xF6, 0xE7,
+		0x85, 0xAE, 0xF6, 0xE7, 0x9E, 0xA7, 0xF6, 0xE7,
+		0x88, 0xB5, 0xF6, 0xE7, 0x8A, 0xAF, 0xF6, 0xE7,
+		0x8C, 0xAA, 0xF6, 0xE7, 0x91, 0xB1, 0xF6, 0xE7,
+		0x94, 0x86, 0xF6, 0xE7, 0x94, 0xBB, 0xF6, 0xE7,
+		0x98, 0x9D, 0xF6, 0xE7, 0x98, 0x9F, 0xF6, 0xE7,
+		0x9B, 0x8A, 0xF6, 0xE7, 0x9B, 0x9B, 0xF6, 0xE7,
+		0x9B, 0xB4, 0xF6, 0xE7, 0x9D, 0x8A, 0xF6, 0xE7,
+		0x9D, 0x80, 0xF6, 0xE7, 0xA3, 0x8C, 0xF6, 0xE7,
+		0xAA, 0xB1, 0xF6, 0xE7, 0xAF, 0x80, 0xF6, 0xE7,
+		0xB1, 0xBB, 0xF6, 0xE7, 0xB5, 0x9B, 0xF6, 0xE7,
+		0xB7, 0xB4, 0xF6, 0xE7, 0xBC, 0xBE, 0xF6, 0xE8,
+		0x80, 0x85, 0xF6, 0xE8, 0x8D, 0x92, 0xF6, 0xE8,
+		0x8F, 0xAF, 0xF6, 0xE8, 0x9D, 0xB9, 0xF6, 0xE8,
+		0xA5, 0x81, 0xF6, 0xE8, 0xA6, 0x86, 0xF6, 0xE8,
+		0xA6, 0x96, 0xF6, 0xE8, 0xAA, 0xBF, 0xF6, 0xE8,
+		0xAB, 0xB8, 0xF6, 0xE8, 0xAB, 0x8B, 0xF6, 0xE8,
+		0xAC, 0x81, 0xF6, 0xE8, 0xAB, 0xBE, 0xF6, 0xE8,
+		0xAB, 0xAD, 0xF6, 0xE8, 0xAC, 0xB9, 0xF6, 0xE8,
+		0xAE, 0x8A, 0xF6, 0xE8, 0xB4, 0x88, 0xF6, 0xE8,
+		0xBC, 0xB8, 0xF6, 0xE9, 0x81, 0xB2, 0xF6, 0xE9,
+		0x86, 0x99, 0xF6, 0xE9, 0x89, 0xB6, 0xF6, 0xE9,
+		0x99, 0xBC, 0xF6, 0xE9, 0x9B, 0xA3, 0xF6, 0xE9,
+		0x9D, 0x96, 0xF6, 0xE9, 0x9F, 0x9B, 0xF6, 0xE9,
+		0x9F, 0xBF, 0xF6, 0xE9, 0xA0, 0x8B, 0xF6, 0xE9,
+		0xA0, 0xBB, 0xF6, 0xE9, 0xAC, 0x92, 0xF6, 0xE9,
+		0xBE, 0x9C, 0xF6, 0xF0, 0xA2, 0xA1, 0x8A, 0xF6,
+		0xF0, 0xA2, 0xA1, 0x84, 0xF6, 0xF0, 0xA3, 0x8F,
+		0x95, 0xF6, 0xE3, 0xAE, 0x9D, 0xF6, 0xE4, 0x80,
+		0x98, 0xF6, 0xE4, 0x80, 0xB9, 0xF6, 0xF0, 0xA5,
+		0x89, 0x89, 0xF6, 0xF0, 0xA5, 0xB3, 0x90, 0xF6,
+		0xF0, 0xA7, 0xBB, 0x93, 0xF6, 0xE9, 0xBD, 0x83,
+		0xF6, 0xE9, 0xBE, 0x8E, 0x66, 0x66, 0x66, 0x69,
+		0x66, 0x6C, 0x66, 0x66, 0x69, 0x66, 0x66, 0x6C,
+		0x73, 0x74, 0x73, 0x74, 0xD5, 0xB4, 0xD5, 0xB6,
+		0xD5, 0xB4, 0xD5, 0xA5, 0xD5, 0xB4, 0xD5, 0xAB,
+		0xD5, 0xBE, 0xD5, 0xB6, 0xD5, 0xB4, 0xD5, 0xAD,
+		0xF6, 0xD7, 0x99, 0xD6, 0xB4, 0xF6, 0xD7, 0xB2,
+		0xD6, 0xB7, 0xD7, 0xA2, 0xD7, 0x90, 0xD7, 0x93,
+		0xD7, 0x94, 0xD7, 0x9B, 0xD7, 0x9C, 0xD7, 0x9D,
+		0xD7, 0xA8, 0xD7, 0xAA, 0x2B, 0xF6, 0xD7, 0xA9,
+		0xD7, 0x81, 0xF6, 0xD7, 0xA9, 0xD7, 0x82, 0xF6,
+		0xD7, 0xA9, 0xD6, 0xBC, 0xD7, 0x81, 0xF6, 0xD7,
+		0xA9, 0xD6, 0xBC, 0xD7, 0x82, 0xF6, 0xD7, 0x90,
+		0xD6, 0xB7, 0xF6, 0xD7, 0x90, 0xD6, 0xB8, 0xF6,
+		0xD7, 0x90, 0xD6, 0xBC, 0xF6, 0xD7, 0x91, 0xD6,
+		0xBC, 0xF6, 0xD7, 0x92, 0xD6, 0xBC, 0xF6, 0xD7,
+		0x93, 0xD6, 0xBC, 0xF6, 0xD7, 0x94, 0xD6, 0xBC,
+		0xF6, 0xD7, 0x95, 0xD6, 0xBC, 0xF6, 0xD7, 0x96,
+		0xD6, 0xBC, 0xF6, 0xD7, 0x98, 0xD6, 0xBC, 0xF6,
+		0xD7, 0x99, 0xD6, 0xBC, 0xF6, 0xD7, 0x9A, 0xD6,
+		0xBC, 0xF6, 0xD7, 0x9B, 0xD6, 0xBC, 0xF6, 0xD7,
+		0x9C, 0xD6, 0xBC, 0xF6, 0xD7, 0x9E, 0xD6, 0xBC,
+		0xF6, 0xD7, 0xA0, 0xD6, 0xBC, 0xF6, 0xD7, 0xA1,
+		0xD6, 0xBC, 0xF6, 0xD7, 0xA3, 0xD6, 0xBC, 0xF6,
+		0xD7, 0xA4, 0xD6, 0xBC, 0xF6, 0xD7, 0xA6, 0xD6,
+		0xBC, 0xF6, 0xD7, 0xA7, 0xD6, 0xBC, 0xF6, 0xD7,
+		0xA8, 0xD6, 0xBC, 0xF6, 0xD7, 0xA9, 0xD6, 0xBC,
+		0xF6, 0xD7, 0xAA, 0xD6, 0xBC, 0xF6, 0xD7, 0x95,
+		0xD6, 0xB9, 0xF6, 0xD7, 0x91, 0xD6, 0xBF, 0xF6,
+		0xD7, 0x9B, 0xD6, 0xBF, 0xF6, 0xD7, 0xA4, 0xD6,
+		0xBF, 0xD7, 0x90, 0xD7, 0x9C, 0xD9, 0xB1, 0xD9,
+		0xB1, 0xD9, 0xBB, 0xD9, 0xBB, 0xD9, 0xBB, 0xD9,
+		0xBB, 0xD9, 0xBE, 0xD9, 0xBE, 0xD9, 0xBE, 0xD9,
+		0xBE, 0xDA, 0x80, 0xDA, 0x80, 0xDA, 0x80, 0xDA,
+		0x80, 0xD9, 0xBA, 0xD9, 0xBA, 0xD9, 0xBA, 0xD9,
+		0xBA, 0xD9, 0xBF, 0xD9, 0xBF, 0xD9, 0xBF, 0xD9,
+		0xBF, 0xD9, 0xB9, 0xD9, 0xB9, 0xD9, 0xB9, 0xD9,
+		0xB9, 0xDA, 0xA4, 0xDA, 0xA4, 0xDA, 0xA4, 0xDA,
+		0xA4, 0xDA, 0xA6, 0xDA, 0xA6, 0xDA, 0xA6, 0xDA,
+		0xA6, 0xDA, 0x84, 0xDA, 0x84, 0xDA, 0x84, 0xDA,
+		0x84, 0xDA, 0x83, 0xDA, 0x83, 0xDA, 0x83, 0xDA,
+		0x83, 0xDA, 0x86, 0xDA, 0x86, 0xDA, 0x86, 0xDA,
+		0x86, 0xDA, 0x87, 0xDA, 0x87, 0xDA, 0x87, 0xDA,
+		0x87, 0xDA, 0x8D, 0xDA, 0x8D, 0xDA, 0x8C, 0xDA,
+		0x8C, 0xDA, 0x8E, 0xDA, 0x8E, 0xDA, 0x88, 0xDA,
+		0x88, 0xDA, 0x98, 0xDA, 0x98, 0xDA, 0x91, 0xDA,
+		0x91, 0xDA, 0xA9, 0xDA, 0xA9, 0xDA, 0xA9, 0xDA,
+		0xA9, 0xDA, 0xAF, 0xDA, 0xAF, 0xDA, 0xAF, 0xDA,
+		0xAF, 0xDA, 0xB3, 0xDA, 0xB3, 0xDA, 0xB3, 0xDA,
+		0xB3, 0xDA, 0xB1, 0xDA, 0xB1, 0xDA, 0xB1, 0xDA,
+		0xB1, 0xDA, 0xBA, 0xDA, 0xBA, 0xDA, 0xBB, 0xDA,
+		0xBB, 0xDA, 0xBB, 0xDA, 0xBB, 0xDB, 0x95, 0xD9,
+		0x94, 0xDB, 0x95, 0xD9, 0x94, 0xDB, 0x81, 0xDB,
+		0x81, 0xDB, 0x81, 0xDB, 0x81, 0xDA, 0xBE, 0xDA,
+		0xBE, 0xDA, 0xBE, 0xDA, 0xBE, 0xDB, 0x92, 0xDB,
+		0x92, 0xDB, 0x92, 0xD9, 0x94, 0xDB, 0x92, 0xD9,
+		0x94, 0xDA, 0xAD, 0xDA, 0xAD, 0xDA, 0xAD, 0xDA,
+		0xAD, 0xDB, 0x87, 0xDB, 0x87, 0xDB, 0x86, 0xDB,
+		0x86, 0xDB, 0x88, 0xDB, 0x88, 0xDB, 0x87, 0xD9,
+		0xB4, 0xDB, 0x8B, 0xDB, 0x8B, 0xDB, 0x85, 0xDB,
+		0x85, 0xDB, 0x89, 0xDB, 0x89, 0xDB, 0x90, 0xDB,
+		0x90, 0xDB, 0x90, 0xDB, 0x90, 0xD9, 0x89, 0xD9,
+		0x89, 0xD9, 0x8A, 0xD9, 0x94, 0xD8, 0xA7, 0xD9,
+		0x8A, 0xD9, 0x94, 0xD8, 0xA7, 0xD9, 0x8A, 0xD9,
+		0x94, 0xDB, 0x95, 0xD9, 0x8A, 0xD9, 0x94, 0xDB,
+		0x95, 0xD9, 0x8A, 0xD9, 0x94, 0xD9, 0x88, 0xD9,
+		0x8A, 0xD9, 0x94, 0xD9, 0x88, 0xD9, 0x8A, 0xD9,
+		0x94, 0xDB, 0x87, 0xD9, 0x8A, 0xD9, 0x94, 0xDB,
+		0x87, 0xD9, 0x8A, 0xD9, 0x94, 0xDB, 0x86, 0xD9,
+		0x8A, 0xD9, 0x94, 0xDB, 0x86, 0xD9, 0x8A, 0xD9,
+		0x94, 0xDB, 0x88, 0xD9, 0x8A, 0xD9, 0x94, 0xDB,
+		0x88, 0xD9, 0x8A, 0xD9, 0x94, 0xDB, 0x90, 0xD9,
+		0x8A, 0xD9, 0x94, 0xDB, 0x90, 0xD9, 0x8A, 0xD9,
+		0x94, 0xDB, 0x90, 0xD9, 0x8A, 0xD9, 0x94, 0xD9,
+		0x89, 0xD9, 0x8A, 0xD9, 0x94, 0xD9, 0x89, 0xD9,
+		0x8A, 0xD9, 0x94, 0xD9, 0x89, 0xDB, 0x8C, 0xDB,
+		0x8C, 0xDB, 0x8C, 0xDB, 0x8C, 0xD9, 0x8A, 0xD9,
+		0x94, 0xD8, 0xAC, 0xD9, 0x8A, 0xD9, 0x94, 0xD8,
+		0xAD, 0xD9, 0x8A, 0xD9, 0x94, 0xD9, 0x85, 0xD9,
+		0x8A, 0xD9, 0x94, 0xD9, 0x89, 0xD9, 0x8A, 0xD9,
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+		0xA8, 0xD8, 0xAD, 0xD8, 0xA8, 0xD8, 0xAE, 0xD8,
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+		0x92, 0xF6, 0xE5, 0xBB, 0xBE, 0xF6, 0xF0, 0xA2,
+		0x8C, 0xB1, 0xF6, 0xF0, 0xA2, 0x8C, 0xB1, 0xF6,
+		0xE8, 0x88, 0x81, 0xF6, 0xE5, 0xBC, 0xA2, 0xF6,
+		0xE5, 0xBC, 0xA2, 0xF6, 0xE3, 0xA3, 0x87, 0xF6,
+		0xF0, 0xA3, 0x8A, 0xB8, 0xF6, 0xF0, 0xA6, 0x87,
+		0x9A, 0xF6, 0xE5, 0xBD, 0xA2, 0xF6, 0xE5, 0xBD,
+		0xAB, 0xF6, 0xE3, 0xA3, 0xA3, 0xF6, 0xE5, 0xBE,
+		0x9A, 0xF6, 0xE5, 0xBF, 0x8D, 0xF6, 0xE5, 0xBF,
+		0x97, 0xF6, 0xE5, 0xBF, 0xB9, 0xF6, 0xE6, 0x82,
+		0x81, 0xF6, 0xE3, 0xA4, 0xBA, 0xF6, 0xE3, 0xA4,
+		0x9C, 0xF6, 0xE6, 0x82, 0x94, 0xF6, 0xF0, 0xA2,
+		0x9B, 0x94, 0xF6, 0xE6, 0x83, 0x87, 0xF6, 0xE6,
+		0x85, 0x88, 0xF6, 0xE6, 0x85, 0x8C, 0xF6, 0xE6,
+		0x85, 0x8E, 0xF6, 0xE6, 0x85, 0x8C, 0xF6, 0xE6,
+		0x85, 0xBA, 0xF6, 0xE6, 0x86, 0x8E, 0xF6, 0xE6,
+		0x86, 0xB2, 0xF6, 0xE6, 0x86, 0xA4, 0xF6, 0xE6,
+		0x86, 0xAF, 0xF6, 0xE6, 0x87, 0x9E, 0xF6, 0xE6,
+		0x87, 0xB2, 0xF6, 0xE6, 0x87, 0xB6, 0xF6, 0xE6,
+		0x88, 0x90, 0xF6, 0xE6, 0x88, 0x9B, 0xF6, 0xE6,
+		0x89, 0x9D, 0xF6, 0xE6, 0x8A, 0xB1, 0xF6, 0xE6,
+		0x8B, 0x94, 0xF6, 0xE6, 0x8D, 0x90, 0xF6, 0xF0,
+		0xA2, 0xAC, 0x8C, 0xF6, 0xE6, 0x8C, 0xBD, 0xF6,
+		0xE6, 0x8B, 0xBC, 0xF6, 0xE6, 0x8D, 0xA8, 0xF6,
+		0xE6, 0x8E, 0x83, 0xF6, 0xE6, 0x8F, 0xA4, 0xF6,
+		0xF0, 0xA2, 0xAF, 0xB1, 0xF6, 0xE6, 0x90, 0xA2,
+		0xF6, 0xE6, 0x8F, 0x85, 0xF6, 0xE6, 0x8E, 0xA9,
+		0xF6, 0xE3, 0xA8, 0xAE, 0xF6, 0xE6, 0x91, 0xA9,
+		0xF6, 0xE6, 0x91, 0xBE, 0xF6, 0xE6, 0x92, 0x9D,
+		0xF6, 0xE6, 0x91, 0xB7, 0xF6, 0xE3, 0xA9, 0xAC,
+		0xF6, 0xE6, 0x95, 0x8F, 0xF6, 0xE6, 0x95, 0xAC,
+		0xF6, 0xF0, 0xA3, 0x80, 0x8A, 0xF6, 0xE6, 0x97,
+		0xA3, 0xF6, 0xE6, 0x9B, 0xB8, 0xF6, 0xE6, 0x99,
+		0x89, 0xF6, 0xE3, 0xAC, 0x99, 0xF6, 0xE6, 0x9A,
+		0x91, 0xF6, 0xE3, 0xAC, 0x88, 0xF6, 0xE3, 0xAB,
+		0xA4, 0xF6, 0xE5, 0x86, 0x92, 0xF6, 0xE5, 0x86,
+		0x95, 0xF6, 0xE6, 0x9C, 0x80, 0xF6, 0xE6, 0x9A,
+		0x9C, 0xF6, 0xE8, 0x82, 0xAD, 0xF6, 0xE4, 0x8F,
+		0x99, 0xF6, 0xE6, 0x9C, 0x97, 0xF6, 0xE6, 0x9C,
+		0x9B, 0xF6, 0xE6, 0x9C, 0xA1, 0xF6, 0xE6, 0x9D,
+		0x9E, 0xF6, 0xE6, 0x9D, 0x93, 0xF6, 0xF0, 0xA3,
+		0x8F, 0x83, 0xF6, 0xE3, 0xAD, 0x89, 0xF6, 0xE6,
+		0x9F, 0xBA, 0xF6, 0xE6, 0x9E, 0x85, 0xF6, 0xE6,
+		0xA1, 0x92, 0xF6, 0xE6, 0xA2, 0x85, 0xF6, 0xF0,
+		0xA3, 0x91, 0xAD, 0xF6, 0xE6, 0xA2, 0x8E, 0xF6,
+		0xE6, 0xA0, 0x9F, 0xF6, 0xE6, 0xA4, 0x94, 0xF6,
+		0xE3, 0xAE, 0x9D, 0xF6, 0xE6, 0xA5, 0x82, 0xF6,
+		0xE6, 0xA6, 0xA3, 0xF6, 0xE6, 0xA7, 0xAA, 0xF6,
+		0xE6, 0xAA, 0xA8, 0xF6, 0xF0, 0xA3, 0x9A, 0xA3,
+		0xF6, 0xE6, 0xAB, 0x9B, 0xF6, 0xE3, 0xB0, 0x98,
+		0xF6, 0xE6, 0xAC, 0xA1, 0xF6, 0xF0, 0xA3, 0xA2,
+		0xA7, 0xF6, 0xE6, 0xAD, 0x94, 0xF6, 0xE3, 0xB1,
+		0x8E, 0xF6, 0xE6, 0xAD, 0xB2, 0xF6, 0xE6, 0xAE,
+		0x9F, 0xF6, 0xE6, 0xAE, 0xBA, 0xF6, 0xE6, 0xAE,
+		0xBB, 0xF6, 0xF0, 0xA3, 0xAA, 0x8D, 0xF6, 0xF0,
+		0xA1, 0xB4, 0x8B, 0xF6, 0xF0, 0xA3, 0xAB, 0xBA,
+		0xF6, 0xE6, 0xB1, 0x8E, 0xF6, 0xF0, 0xA3, 0xB2,
+		0xBC, 0xF6, 0xE6, 0xB2, 0xBF, 0xF6, 0xE6, 0xB3,
+		0x8D, 0xF6, 0xE6, 0xB1, 0xA7, 0xF6, 0xE6, 0xB4,
+		0x96, 0xF6, 0xE6, 0xB4, 0xBE, 0xF6, 0xE6, 0xB5,
+		0xB7, 0xF6, 0xE6, 0xB5, 0x81, 0xF6, 0xE6, 0xB5,
+		0xA9, 0xF6, 0xE6, 0xB5, 0xB8, 0xF6, 0xE6, 0xB6,
+		0x85, 0xF6, 0xF0, 0xA3, 0xB4, 0x9E, 0xF6, 0xE6,
+		0xB4, 0xB4, 0xF6, 0xE6, 0xB8, 0xAF, 0xF6, 0xE6,
+		0xB9, 0xAE, 0xF6, 0xE3, 0xB4, 0xB3, 0xF6, 0xE6,
+		0xBB, 0x8B, 0xF6, 0xE6, 0xBB, 0x87, 0xF6, 0xF0,
+		0xA3, 0xBB, 0x91, 0xF6, 0xE6, 0xB7, 0xB9, 0xF6,
+		0xE6, 0xBD, 0xAE, 0xF6, 0xF0, 0xA3, 0xBD, 0x9E,
+		0xF6, 0xF0, 0xA3, 0xBE, 0x8E, 0xF6, 0xE6, 0xBF,
+		0x86, 0xF6, 0xE7, 0x80, 0xB9, 0xF6, 0xE7, 0x80,
+		0x9E, 0xF6, 0xE7, 0x80, 0x9B, 0xF6, 0xE3, 0xB6,
+		0x96, 0xF6, 0xE7, 0x81, 0x8A, 0xF6, 0xE7, 0x81,
+		0xBD, 0xF6, 0xE7, 0x81, 0xB7, 0xF6, 0xE7, 0x82,
+		0xAD, 0xF6, 0xF0, 0xA0, 0x94, 0xA5, 0xF6, 0xE7,
+		0x85, 0x85, 0xF6, 0xF0, 0xA4, 0x89, 0xA3, 0xF6,
+		0xE7, 0x86, 0x9C, 0xF6, 0xF0, 0xA4, 0x8E, 0xAB,
+		0xF6, 0xE7, 0x88, 0xA8, 0xF6, 0xE7, 0x88, 0xB5,
+		0xF6, 0xE7, 0x89, 0x90, 0xF6, 0xF0, 0xA4, 0x98,
+		0x88, 0xF6, 0xE7, 0x8A, 0x80, 0xF6, 0xE7, 0x8A,
+		0x95, 0xF6, 0xF0, 0xA4, 0x9C, 0xB5, 0xF6, 0xF0,
+		0xA4, 0xA0, 0x94, 0xF6, 0xE7, 0x8D, 0xBA, 0xF6,
+		0xE7, 0x8E, 0x8B, 0xF6, 0xE3, 0xBA, 0xAC, 0xF6,
+		0xE7, 0x8E, 0xA5, 0xF6, 0xE3, 0xBA, 0xB8, 0xF6,
+		0xE3, 0xBA, 0xB8, 0xF6, 0xE7, 0x91, 0x87, 0xF6,
+		0xE7, 0x91, 0x9C, 0xF6, 0xE7, 0x91, 0xB1, 0xF6,
+		0xE7, 0x92, 0x85, 0xF6, 0xE7, 0x93, 0x8A, 0xF6,
+		0xE3, 0xBC, 0x9B, 0xF6, 0xE7, 0x94, 0xA4, 0xF6,
+		0xF0, 0xA4, 0xB0, 0xB6, 0xF6, 0xE7, 0x94, 0xBE,
+		0xF6, 0xF0, 0xA4, 0xB2, 0x92, 0xF6, 0xE7, 0x95,
+		0xB0, 0xF6, 0xF0, 0xA2, 0x86, 0x9F, 0xF6, 0xE7,
+		0x98, 0x90, 0xF6, 0xF0, 0xA4, 0xBE, 0xA1, 0xF6,
+		0xF0, 0xA4, 0xBE, 0xB8, 0xF6, 0xF0, 0xA5, 0x81,
+		0x84, 0xF6, 0xE3, 0xBF, 0xBC, 0xF6, 0xE4, 0x80,
+		0x88, 0xF6, 0xE7, 0x9B, 0xB4, 0xF6, 0xF0, 0xA5,
+		0x83, 0xB3, 0xF6, 0xF0, 0xA5, 0x83, 0xB2, 0xF6,
+		0xF0, 0xA5, 0x84, 0x99, 0xF6, 0xF0, 0xA5, 0x84,
+		0xB3, 0xF6, 0xE7, 0x9C, 0x9E, 0xF6, 0xE7, 0x9C,
+		0x9F, 0xF6, 0xE7, 0x9C, 0x9F, 0xF6, 0xE7, 0x9D,
+		0x8A, 0xF6, 0xE4, 0x80, 0xB9, 0xF6, 0xE7, 0x9E,
+		0x8B, 0xF6, 0xE4, 0x81, 0x86, 0xF6, 0xE4, 0x82,
+		0x96, 0xF6, 0xF0, 0xA5, 0x90, 0x9D, 0xF6, 0xE7,
+		0xA1, 0x8E, 0xF6, 0xE7, 0xA2, 0x8C, 0xF6, 0xE7,
+		0xA3, 0x8C, 0xF6, 0xE4, 0x83, 0xA3, 0xF6, 0xF0,
+		0xA5, 0x98, 0xA6, 0xF6, 0xE7, 0xA5, 0x96, 0xF6,
+		0xF0, 0xA5, 0x9A, 0x9A, 0xF6, 0xF0, 0xA5, 0x9B,
+		0x85, 0xF6, 0xE7, 0xA6, 0x8F, 0xF6, 0xE7, 0xA7,
+		0xAB, 0xF6, 0xE4, 0x84, 0xAF, 0xF6, 0xE7, 0xA9,
+		0x80, 0xF6, 0xE7, 0xA9, 0x8A, 0xF6, 0xE7, 0xA9,
+		0x8F, 0xF6, 0xF0, 0xA5, 0xA5, 0xBC, 0xF6, 0xF0,
+		0xA5, 0xAA, 0xA7, 0xF6, 0xF0, 0xA5, 0xAA, 0xA7,
+		0xF6, 0xE7, 0xAB, 0xAE, 0xF6, 0xE4, 0x88, 0x82,
+		0xF6, 0xF0, 0xA5, 0xAE, 0xAB, 0xF6, 0xE7, 0xAF,
+		0x86, 0xF6, 0xE7, 0xAF, 0x89, 0xF6, 0xE4, 0x88,
+		0xA7, 0xF6, 0xF0, 0xA5, 0xB2, 0x80, 0xF6, 0xE7,
+		0xB3, 0x92, 0xF6, 0xE4, 0x8A, 0xA0, 0xF6, 0xE7,
+		0xB3, 0xA8, 0xF6, 0xE7, 0xB3, 0xA3, 0xF6, 0xE7,
+		0xB4, 0x80, 0xF6, 0xF0, 0xA5, 0xBE, 0x86, 0xF6,
+		0xE7, 0xB5, 0xA3, 0xF6, 0xE4, 0x8C, 0x81, 0xF6,
+		0xE7, 0xB7, 0x87, 0xF6, 0xE7, 0xB8, 0x82, 0xF6,
+		0xE7, 0xB9, 0x85, 0xF6, 0xE4, 0x8C, 0xB4, 0xF6,
+		0xF0, 0xA6, 0x88, 0xA8, 0xF6, 0xF0, 0xA6, 0x89,
+		0x87, 0xF6, 0xE4, 0x8D, 0x99, 0xF6, 0xF0, 0xA6,
+		0x8B, 0x99, 0xF6, 0xE7, 0xBD, 0xBA, 0xF6, 0xF0,
+		0xA6, 0x8C, 0xBE, 0xF6, 0xE7, 0xBE, 0x95, 0xF6,
+		0xE7, 0xBF, 0xBA, 0xF6, 0xE8, 0x80, 0x85, 0xF6,
+		0xF0, 0xA6, 0x93, 0x9A, 0xF6, 0xF0, 0xA6, 0x94,
+		0xA3, 0xF6, 0xE8, 0x81, 0xA0, 0xF6, 0xF0, 0xA6,
+		0x96, 0xA8, 0xF6, 0xE8, 0x81, 0xB0, 0xF6, 0xF0,
+		0xA3, 0x8D, 0x9F, 0xF6, 0xE4, 0x8F, 0x95, 0xF6,
+		0xE8, 0x82, 0xB2, 0xF6, 0xE8, 0x84, 0x83, 0xF6,
+		0xE4, 0x90, 0x8B, 0xF6, 0xE8, 0x84, 0xBE, 0xF6,
+		0xE5, 0xAA, 0xB5, 0xF6, 0xF0, 0xA6, 0x9E, 0xA7,
+		0xF6, 0xF0, 0xA6, 0x9E, 0xB5, 0xF6, 0xF0, 0xA3,
+		0x8E, 0x93, 0xF6, 0xF0, 0xA3, 0x8E, 0x9C, 0xF6,
+		0xE8, 0x88, 0x81, 0xF6, 0xE8, 0x88, 0x84, 0xF6,
+		0xE8, 0xBE, 0x9E, 0xF6, 0xE4, 0x91, 0xAB, 0xF6,
+		0xE8, 0x8A, 0x91, 0xF6, 0xE8, 0x8A, 0x8B, 0xF6,
+		0xE8, 0x8A, 0x9D, 0xF6, 0xE5, 0x8A, 0xB3, 0xF6,
+		0xE8, 0x8A, 0xB1, 0xF6, 0xE8, 0x8A, 0xB3, 0xF6,
+		0xE8, 0x8A, 0xBD, 0xF6, 0xE8, 0x8B, 0xA6, 0xF6,
+		0xF0, 0xA6, 0xAC, 0xBC, 0xF6, 0xE8, 0x8B, 0xA5,
+		0xF6, 0xE8, 0x8C, 0x9D, 0xF6, 0xE8, 0x8D, 0xA3,
+		0xF6, 0xE8, 0x8E, 0xAD, 0xF6, 0xE8, 0x8C, 0xA3,
+		0xF6, 0xE8, 0x8E, 0xBD, 0xF6, 0xE8, 0x8F, 0xA7,
+		0xF6, 0xE8, 0x91, 0x97, 0xF6, 0xE8, 0x8D, 0x93,
+		0xF6, 0xE8, 0x8F, 0x8A, 0xF6, 0xE8, 0x8F, 0x8C,
+		0xF6, 0xE8, 0x8F, 0x9C, 0xF6, 0xF0, 0xA6, 0xB0,
+		0xB6, 0xF6, 0xF0, 0xA6, 0xB5, 0xAB, 0xF6, 0xF0,
+		0xA6, 0xB3, 0x95, 0xF6, 0xE4, 0x94, 0xAB, 0xF6,
+		0xE8, 0x93, 0xB1, 0xF6, 0xE8, 0x93, 0xB3, 0xF6,
+		0xE8, 0x94, 0x96, 0xF6, 0xF0, 0xA7, 0x8F, 0x8A,
+		0xF6, 0xE8, 0x95, 0xA4, 0xF6, 0xF0, 0xA6, 0xBC,
+		0xAC, 0xF6, 0xE4, 0x95, 0x9D, 0xF6, 0xE4, 0x95,
+		0xA1, 0xF6, 0xF0, 0xA6, 0xBE, 0xB1, 0xF6, 0xF0,
+		0xA7, 0x83, 0x92, 0xF6, 0xE4, 0x95, 0xAB, 0xF6,
+		0xE8, 0x99, 0x90, 0xF6, 0xE8, 0x99, 0x9C, 0xF6,
+		0xE8, 0x99, 0xA7, 0xF6, 0xE8, 0x99, 0xA9, 0xF6,
+		0xE8, 0x9A, 0xA9, 0xF6, 0xE8, 0x9A, 0x88, 0xF6,
+		0xE8, 0x9C, 0x8E, 0xF6, 0xE8, 0x9B, 0xA2, 0xF6,
+		0xE8, 0x9D, 0xB9, 0xF6, 0xE8, 0x9C, 0xA8, 0xF6,
+		0xE8, 0x9D, 0xAB, 0xF6, 0xE8, 0x9E, 0x86, 0xF6,
+		0xE4, 0x97, 0x97, 0xF6, 0xE8, 0x9F, 0xA1, 0xF6,
+		0xE8, 0xA0, 0x81, 0xF6, 0xE4, 0x97, 0xB9, 0xF6,
+		0xE8, 0xA1, 0xA0, 0xF6, 0xE8, 0xA1, 0xA3, 0xF6,
+		0xF0, 0xA7, 0x99, 0xA7, 0xF6, 0xE8, 0xA3, 0x97,
+		0xF6, 0xE8, 0xA3, 0x9E, 0xF6, 0xE4, 0x98, 0xB5,
+		0xF6, 0xE8, 0xA3, 0xBA, 0xF6, 0xE3, 0x92, 0xBB,
+		0xF6, 0xF0, 0xA7, 0xA2, 0xAE, 0xF6, 0xF0, 0xA7,
+		0xA5, 0xA6, 0xF6, 0xE4, 0x9A, 0xBE, 0xF6, 0xE4,
+		0x9B, 0x87, 0xF6, 0xE8, 0xAA, 0xA0, 0xF6, 0xE8,
+		0xAB, 0xAD, 0xF6, 0xE8, 0xAE, 0x8A, 0xF6, 0xE8,
+		0xB1, 0x95, 0xF6, 0xF0, 0xA7, 0xB2, 0xA8, 0xF6,
+		0xE8, 0xB2, 0xAB, 0xF6, 0xE8, 0xB3, 0x81, 0xF6,
+		0xE8, 0xB4, 0x9B, 0xF6, 0xE8, 0xB5, 0xB7, 0xF6,
+		0xF0, 0xA7, 0xBC, 0xAF, 0xF6, 0xF0, 0xA0, 0xA0,
+		0x84, 0xF6, 0xE8, 0xB7, 0x8B, 0xF6, 0xE8, 0xB6,
+		0xBC, 0xF6, 0xE8, 0xB7, 0xB0, 0xF6, 0xF0, 0xA0,
+		0xA3, 0x9E, 0xF6, 0xE8, 0xBB, 0x94, 0xF6, 0xE8,
+		0xBC, 0xB8, 0xF6, 0xF0, 0xA8, 0x97, 0x92, 0xF6,
+		0xF0, 0xA8, 0x97, 0xAD, 0xF6, 0xE9, 0x82, 0x94,
+		0xF6, 0xE9, 0x83, 0xB1, 0xF6, 0xE9, 0x84, 0x91,
+		0xF6, 0xF0, 0xA8, 0x9C, 0xAE, 0xF6, 0xE9, 0x84,
+		0x9B, 0xF6, 0xE9, 0x88, 0xB8, 0xF6, 0xE9, 0x8B,
+		0x97, 0xF6, 0xE9, 0x8B, 0x98, 0xF6, 0xE9, 0x89,
+		0xBC, 0xF6, 0xE9, 0x8F, 0xB9, 0xF6, 0xE9, 0x90,
+		0x95, 0xF6, 0xF0, 0xA8, 0xAF, 0xBA, 0xF6, 0xE9,
+		0x96, 0x8B, 0xF6, 0xE4, 0xA6, 0x95, 0xF6, 0xE9,
+		0x96, 0xB7, 0xF6, 0xF0, 0xA8, 0xB5, 0xB7, 0xF6,
+		0xE4, 0xA7, 0xA6, 0xF6, 0xE9, 0x9B, 0x83, 0xF6,
+		0xE5, 0xB6, 0xB2, 0xF6, 0xE9, 0x9C, 0xA3, 0xF6,
+		0xF0, 0xA9, 0x85, 0x85, 0xF6, 0xF0, 0xA9, 0x88,
+		0x9A, 0xF6, 0xE4, 0xA9, 0xAE, 0xF6, 0xE4, 0xA9,
+		0xB6, 0xF6, 0xE9, 0x9F, 0xA0, 0xF6, 0xF0, 0xA9,
+		0x90, 0x8A, 0xF6, 0xE4, 0xAA, 0xB2, 0xF6, 0xF0,
+		0xA9, 0x92, 0x96, 0xF6, 0xE9, 0xA0, 0x8B, 0xF6,
+		0xE9, 0xA0, 0x8B, 0xF6, 0xE9, 0xA0, 0xA9, 0xF6,
+		0xF0, 0xA9, 0x96, 0xB6, 0xF6, 0xE9, 0xA3, 0xA2,
+		0xF6, 0xE4, 0xAC, 0xB3, 0xF6, 0xE9, 0xA4, 0xA9,
+		0xF6, 0xE9, 0xA6, 0xA7, 0xF6, 0xE9, 0xA7, 0x82,
+		0xF6, 0xE9, 0xA7, 0xBE, 0xF6, 0xE4, 0xAF, 0x8E,
+		0xF6, 0xF0, 0xA9, 0xAC, 0xB0, 0xF6, 0xE9, 0xAC,
+		0x92, 0xF6, 0xE9, 0xB1, 0x80, 0xF6, 0xE9, 0xB3,
+		0xBD, 0xF6, 0xE4, 0xB3, 0x8E, 0xF6, 0xE4, 0xB3,
+		0xAD, 0xF6, 0xE9, 0xB5, 0xA7, 0xF6, 0xF0, 0xAA,
+		0x83, 0x8E, 0xF6, 0xE4, 0xB3, 0xB8, 0xF6, 0xF0,
+		0xAA, 0x84, 0x85, 0xF6, 0xF0, 0xAA, 0x88, 0x8E,
+		0xF6, 0xF0, 0xAA, 0x8A, 0x91, 0xF6, 0xE9, 0xBA,
+		0xBB, 0xF6, 0xE4, 0xB5, 0x96, 0xF6, 0xE9, 0xBB,
+		0xB9, 0xF6, 0xE9, 0xBB, 0xBE, 0xF6, 0xE9, 0xBC,
+		0x85, 0xF6, 0xE9, 0xBC, 0x8F, 0xF6, 0xE9, 0xBC,
+		0x96, 0xF6, 0xE9, 0xBC, 0xBB, 0xF6, 0xF0, 0xAA,
+		0x98, 0x80,
+	},
+};
+
+static const uchar_t u8_case_common_b2_tbl[2][2][256] = {
+	{
+		{
+			0,  N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, 1,  2,  N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, 3,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			4,  N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+
+	},
+	{
+		{
+			0,  N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, 1,  2,  N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, 3,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+		{
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			4,  N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+			N_, N_, N_, N_, N_, N_, N_, N_,
+		},
+
+	},
+
+};
+
+static const u8_displacement_t u8_tolower_b3_tbl[2][5][256] = {
+	{
+		{	/* Third byte table 0. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { 0, 0 },
+			{ 1, 60 }, { 2, 123 }, { 3, 185 }, { 4, 257 },
+			{ 5, 321 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 6, 373 }, { 7, 439 },
+			{ 8, 465 }, { 9, 561 }, { 10, 593 }, { 11, 649 },
+			{ 12, 703 }, { 13, 749 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+		},
+		{	/* Third byte table 1. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ 14, 795 }, { 15, 891 }, { 16, 987 }, { 17, 1068 },
+			{ 18, 1155 }, { 19, 1245 }, { 20, 1299 }, { 21, 1386 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+		},
+		{	/* Third byte table 2. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ 22, 1443 }, { 23, 1448 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 24, 1496 }, { 25, 1526 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+		},
+		{	/* Third byte table 3. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
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+		{	/* Third byte table 3. */
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+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ 34, 2061 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+		},
+		{	/* Third byte table 4. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ 35, 2139 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+		},
+	},
+};
+
+static const uchar_t u8_tolower_b4_tbl[2][36][257] = {
+	{
+		{	/* Fourth byte table 0. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			46,  48,  50,  52,  54,  56,  58,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,
+		},
+		{	/* Fourth byte table 1. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  12,  12,  14,  14,  16,
+			16,  18,  18,  20,  20,  22,  22,  24,
+			24,  26,  26,  28,  28,  30,  30,  32,
+			32,  34,  34,  36,  36,  38,  38,  40,
+			40,  42,  42,  44,  44,  46,  46,  48,
+			48,  49,  49,  51,  51,  53,  53,  55,
+			55,  55,  57,  57,  59,  59,  61,  61,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,
+		},
+		{	/* Fourth byte table 2. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   2,   4,   4,   6,   6,
+			8,   8,   8,   10,  10,  12,  12,  14,
+			14,  16,  16,  18,  18,  20,  20,  22,
+			22,  24,  24,  26,  26,  28,  28,  30,
+			30,  32,  32,  34,  34,  36,  36,  38,
+			38,  40,  40,  42,  42,  44,  44,  46,
+			46,  48,  48,  50,  50,  52,  52,  54,
+			54,  56,  58,  58,  60,  60,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,
+		},
+		{	/* Fourth byte table 3. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   4,   4,   6,   6,   8,
+			10,  10,  12,  14,  16,  16,  16,  18,
+			20,  22,  24,  24,  26,  28,  28,  30,
+			32,  34,  34,  34,  34,  36,  38,  38,
+			40,  42,  42,  44,  44,  46,  46,  48,
+			50,  50,  52,  52,  52,  54,  54,  56,
+			58,  58,  60,  62,  64,  64,  66,  66,
+			68,  70,  70,  70,  70,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,
+		},
+		{	/* Fourth byte table 4. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   2,   4,   4,
+			6,   8,   8,   10,  12,  12,  14,  14,
+			16,  16,  18,  18,  20,  20,  22,  22,
+			24,  24,  26,  26,  28,  28,  28,  30,
+			30,  32,  32,  34,  34,  36,  36,  38,
+			38,  40,  40,  42,  42,  44,  44,  46,
+			46,  46,  48,  50,  50,  52,  52,  54,
+			56,  58,  58,  60,  60,  62,  62,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 5. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  12,  12,  14,  14,  16,
+			16,  18,  18,  20,  20,  22,  22,  24,
+			24,  26,  26,  28,  28,  30,  30,  32,
+			32,  34,  34,  36,  36,  38,  38,  40,
+			40,  42,  42,  44,  44,  46,  46,  48,
+			48,  50,  50,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,
+		},
+		{	/* Fourth byte table 6. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   2,
+			2,   4,   6,   8,   8,   10,  10,  12,
+			14,  14,  16,  18,  20,  22,  24,  26,
+			28,  30,  32,  34,  36,  38,  40,  42,
+			44,  46,  48,  48,  50,  52,  54,  56,
+			58,  60,  62,  64,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,
+		},
+		{	/* Fourth byte table 7. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  12,  12,  14,  14,  16,
+			16,  18,  18,  20,  20,  22,  22,  24,
+			24,  24,  24,  24,  24,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,
+		},
+		{	/* Fourth byte table 8. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			48,  50,  52,  54,  56,  58,  60,  62,
+			64,  66,  68,  70,  72,  74,  76,  78,
+			80,  82,  84,  86,  88,  90,  92,  94,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 9. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  12,  12,  14,  14,  16,
+			16,  18,  18,  20,  20,  22,  22,  24,
+			24,  26,  26,  28,  28,  30,  30,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,
+		},
+		{	/* Fourth byte table 10. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  12,  12,  14,  14,  16,
+			16,  18,  18,  20,  20,  22,  22,  24,
+			24,  26,  26,  28,  28,  30,  30,  32,
+			32,  34,  34,  36,  36,  38,  38,  40,
+			40,  42,  42,  44,  44,  46,  46,  48,
+			48,  50,  50,  52,  52,  54,  54,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,
+		},
+		{	/* Fourth byte table 11. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   2,   4,   4,   6,   6,
+			8,   8,   10,  10,  12,  12,  14,  14,
+			14,  16,  16,  18,  18,  20,  20,  22,
+			22,  24,  24,  26,  26,  28,  28,  30,
+			30,  32,  32,  34,  34,  36,  36,  38,
+			38,  40,  40,  42,  42,  44,  44,  46,
+			46,  48,  48,  50,  50,  52,  52,  52,
+			52,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,
+		},
+		{	/* Fourth byte table 12. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  12,  12,  14,  14,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  18,  20,  22,  24,  26,  28,
+			30,  32,  34,  36,  38,  40,  42,  44,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,
+		},
+		{	/* Fourth byte table 13. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,
+		},
+		{	/* Fourth byte table 14. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   6,   6,   9,   9,   12,
+			12,  15,  15,  18,  18,  21,  21,  24,
+			24,  27,  27,  30,  30,  33,  33,  36,
+			36,  39,  39,  42,  42,  45,  45,  48,
+			48,  51,  51,  54,  54,  57,  57,  60,
+			60,  63,  63,  66,  66,  69,  69,  72,
+			72,  75,  75,  78,  78,  81,  81,  84,
+			84,  87,  87,  90,  90,  93,  93,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 15. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   6,   6,   9,   9,   12,
+			12,  15,  15,  18,  18,  21,  21,  24,
+			24,  27,  27,  30,  30,  33,  33,  36,
+			36,  39,  39,  42,  42,  45,  45,  48,
+			48,  51,  51,  54,  54,  57,  57,  60,
+			60,  63,  63,  66,  66,  69,  69,  72,
+			72,  75,  75,  78,  78,  81,  81,  84,
+			84,  87,  87,  90,  90,  93,  93,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 16. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   6,   6,   9,   9,   12,
+			12,  15,  15,  18,  18,  21,  21,  24,
+			24,  27,  27,  30,  30,  33,  33,  33,
+			33,  33,  33,  33,  33,  33,  33,  33,
+			33,  36,  36,  39,  39,  42,  42,  45,
+			45,  48,  48,  51,  51,  54,  54,  57,
+			57,  60,  60,  63,  63,  66,  66,  69,
+			69,  72,  72,  75,  75,  78,  78,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,
+		},
+		{	/* Fourth byte table 17. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   6,   6,   9,   9,   12,
+			12,  15,  15,  18,  18,  21,  21,  24,
+			24,  27,  27,  30,  30,  33,  33,  36,
+			36,  39,  39,  42,  42,  45,  45,  48,
+			48,  51,  51,  54,  54,  57,  57,  60,
+			60,  63,  63,  66,  66,  69,  69,  72,
+			72,  75,  75,  78,  78,  81,  81,  84,
+			84,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,
+		},
+		{	/* Fourth byte table 18. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  27,  30,  33,  36,  39,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  45,  48,  51,  54,  57,  60,  63,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  69,  72,  75,  78,  81,  84,  87,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,
+		},
+		{	/* Fourth byte table 19. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  21,  21,  24,  24,  27,  27,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  33,  36,  39,  42,  45,  48,  51,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,
+		},
+		{	/* Fourth byte table 20. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  75,  78,  81,  84,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,
+		},
+		{	/* Fourth byte table 21. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  18,  21,  24,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  30,  33,  36,  39,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  45,  48,  51,  54,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,
+		},
+		{	/* Fourth byte table 22. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   2,
+			2,   2,   2,   3,   5,   5,   5,   5,
+			5,   5,   5,   5,   5,   5,   5,   5,
+			5,   5,   5,   5,   5,   5,   5,   5,
+			5,   5,   5,   5,   5,   5,   5,   5,
+			5,   5,   5,   5,   5,   5,   5,   5,
+			5,   5,   5,   5,   5,   5,   5,   5,
+			5,   5,   5,   5,   5,   5,   5,   5,
+			5,   5,   5,   5,   5,   5,   5,   5,
+			5,   5,   5,   5,   5,   5,   5,   5,
+			5,   5,   5,   5,   5,   5,   5,   5,
+			5,   5,   5,   5,   5,   5,   5,   5,
+			5,
+		},
+		{	/* Fourth byte table 23. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,
+		},
+		{	/* Fourth byte table 24. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   3,
+			6,   9,   12,  15,  18,  21,  24,  27,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,
+		},
+		{	/* Fourth byte table 25. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,
+		},
+		{	/* Fourth byte table 26. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   6,   9,   12,  15,  18,
+			21,  24,  27,  30,  33,  36,  39,  42,
+			45,  48,  51,  54,  57,  60,  63,  66,
+			69,  72,  75,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,
+		},
+		{	/* Fourth byte table 27. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  68,  72,  76,  80,  84,  88,  92,
+			96,  100, 104, 108, 112, 116, 120, 124,
+			128, 132, 136, 140, 144, 148, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152, 152, 152, 152, 152, 152, 152, 152,
+			152,
+		},
+		{	/* Fourth byte table 28. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 29. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 30. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 31. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 32. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 33. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 34. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 35. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+	},
+	{
+		{	/* Fourth byte table 0. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			46,  48,  50,  52,  54,  56,  58,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,  60,  60,  60,  60,  60,  60,  60,
+			60,
+		},
+		{	/* Fourth byte table 1. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  12,  12,  14,  14,  16,
+			16,  18,  18,  20,  20,  22,  22,  24,
+			24,  26,  26,  28,  28,  30,  30,  32,
+			32,  34,  34,  36,  36,  38,  38,  40,
+			40,  42,  42,  44,  44,  46,  46,  48,
+			48,  49,  49,  51,  51,  53,  53,  55,
+			55,  55,  57,  57,  59,  59,  61,  61,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,
+		},
+		{	/* Fourth byte table 2. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   2,   4,   4,   6,   6,
+			8,   8,   8,   10,  10,  12,  12,  14,
+			14,  16,  16,  18,  18,  20,  20,  22,
+			22,  24,  24,  26,  26,  28,  28,  30,
+			30,  32,  32,  34,  34,  36,  36,  38,
+			38,  40,  40,  42,  42,  44,  44,  46,
+			46,  48,  48,  50,  50,  52,  52,  54,
+			54,  56,  58,  58,  60,  60,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,
+		},
+		{	/* Fourth byte table 3. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   4,   4,   6,   6,   8,
+			10,  10,  12,  14,  16,  16,  16,  18,
+			20,  22,  24,  24,  26,  28,  28,  30,
+			32,  34,  34,  34,  34,  36,  38,  38,
+			40,  42,  42,  44,  44,  46,  46,  48,
+			50,  50,  52,  52,  52,  54,  54,  56,
+			58,  58,  60,  62,  64,  64,  66,  66,
+			68,  70,  70,  70,  70,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,
+		},
+		{	/* Fourth byte table 4. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   2,   4,   4,
+			6,   8,   8,   10,  12,  12,  14,  14,
+			16,  16,  18,  18,  20,  20,  22,  22,
+			24,  24,  26,  26,  28,  28,  28,  30,
+			30,  32,  32,  34,  34,  36,  36,  38,
+			38,  40,  40,  42,  42,  44,  44,  46,
+			46,  46,  48,  50,  50,  52,  52,  54,
+			56,  58,  58,  60,  60,  62,  62,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 5. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  12,  12,  14,  14,  16,
+			16,  18,  18,  20,  20,  22,  22,  24,
+			24,  26,  26,  28,  28,  30,  30,  32,
+			32,  34,  34,  36,  36,  38,  38,  40,
+			40,  42,  42,  44,  44,  46,  46,  48,
+			48,  50,  50,  52,  52,  52,  52,  52,
+			52,  52,  52,  55,  57,  57,  59,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,
+		},
+		{	/* Fourth byte table 6. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   2,   4,   6,   8,   10,
+			10,  12,  12,  14,  14,  16,  16,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,
+		},
+		{	/* Fourth byte table 7. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   2,
+			2,   4,   6,   8,   8,   10,  10,  12,
+			14,  14,  16,  18,  20,  22,  24,  26,
+			28,  30,  32,  34,  36,  38,  40,  42,
+			44,  46,  48,  48,  50,  52,  54,  56,
+			58,  60,  62,  64,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,
+		},
+		{	/* Fourth byte table 8. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  12,  12,  14,  14,  16,
+			16,  18,  18,  20,  20,  22,  22,  24,
+			24,  24,  24,  24,  24,  26,  26,  26,
+			28,  28,  30,  32,  32,  32,  34,  36,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,
+		},
+		{	/* Fourth byte table 9. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			48,  50,  52,  54,  56,  58,  60,  62,
+			64,  66,  68,  70,  72,  74,  76,  78,
+			80,  82,  84,  86,  88,  90,  92,  94,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 10. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  12,  12,  14,  14,  16,
+			16,  18,  18,  20,  20,  22,  22,  24,
+			24,  26,  26,  28,  28,  30,  30,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,
+		},
+		{	/* Fourth byte table 11. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  12,  12,  14,  14,  16,
+			16,  18,  18,  20,  20,  22,  22,  24,
+			24,  26,  26,  28,  28,  30,  30,  32,
+			32,  34,  34,  36,  36,  38,  38,  40,
+			40,  42,  42,  44,  44,  46,  46,  48,
+			48,  50,  50,  52,  52,  54,  54,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,
+		},
+		{	/* Fourth byte table 12. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   4,   6,   6,   8,   8,
+			10,  10,  12,  12,  14,  14,  16,  16,
+			16,  18,  18,  20,  20,  22,  22,  24,
+			24,  26,  26,  28,  28,  30,  30,  32,
+			32,  34,  34,  36,  36,  38,  38,  40,
+			40,  42,  42,  44,  44,  46,  46,  48,
+			48,  50,  50,  52,  52,  54,  54,  56,
+			56,  58,  58,  60,  60,  62,  62,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 13. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  12,  12,  14,  14,  16,
+			16,  18,  18,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  22,  24,  26,  28,  30,  32,
+			34,  36,  38,  40,  42,  44,  46,  48,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,
+		},
+		{	/* Fourth byte table 14. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,  46,  46,  46,  46,  46,  46,  46,
+			46,
+		},
+		{	/* Fourth byte table 15. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 16. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,
+		},
+		{	/* Fourth byte table 17. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   6,   6,   9,   9,   12,
+			12,  15,  15,  18,  18,  21,  21,  24,
+			24,  27,  27,  30,  30,  33,  33,  36,
+			36,  39,  39,  42,  42,  45,  45,  48,
+			48,  51,  51,  54,  54,  57,  57,  60,
+			60,  63,  63,  66,  66,  69,  69,  72,
+			72,  75,  75,  78,  78,  81,  81,  84,
+			84,  87,  87,  90,  90,  93,  93,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 18. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   6,   6,   9,   9,   12,
+			12,  15,  15,  18,  18,  21,  21,  24,
+			24,  27,  27,  30,  30,  33,  33,  36,
+			36,  39,  39,  42,  42,  45,  45,  48,
+			48,  51,  51,  54,  54,  57,  57,  60,
+			60,  63,  63,  66,  66,  69,  69,  72,
+			72,  75,  75,  78,  78,  81,  81,  84,
+			84,  87,  87,  90,  90,  93,  93,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 19. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   6,   6,   9,   9,   12,
+			12,  15,  15,  18,  18,  21,  21,  24,
+			24,  27,  27,  30,  30,  33,  33,  33,
+			33,  33,  33,  33,  33,  33,  33,  33,
+			33,  36,  36,  39,  39,  42,  42,  45,
+			45,  48,  48,  51,  51,  54,  54,  57,
+			57,  60,  60,  63,  63,  66,  66,  69,
+			69,  72,  72,  75,  75,  78,  78,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  81,
+			81,
+		},
+		{	/* Fourth byte table 20. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   6,   6,   9,   9,   12,
+			12,  15,  15,  18,  18,  21,  21,  24,
+			24,  27,  27,  30,  30,  33,  33,  36,
+			36,  39,  39,  42,  42,  45,  45,  48,
+			48,  51,  51,  54,  54,  57,  57,  60,
+			60,  63,  63,  66,  66,  69,  69,  72,
+			72,  75,  75,  78,  78,  81,  81,  84,
+			84,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,
+		},
+		{	/* Fourth byte table 21. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  27,  30,  33,  36,  39,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  45,  48,  51,  54,  57,  60,  63,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  69,  72,  75,  78,  81,  84,  87,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,
+		},
+		{	/* Fourth byte table 22. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  21,  21,  24,  24,  27,  27,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  33,  36,  39,  42,  45,  48,  51,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,
+		},
+		{	/* Fourth byte table 23. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  75,  78,  81,  84,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,
+		},
+		{	/* Fourth byte table 24. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  15,  15,
+			15,  15,  15,  15,  15,  15,  15,  15,
+			15,  18,  21,  24,  27,  27,  27,  27,
+			27,  27,  27,  27,  27,  27,  27,  27,
+			27,  30,  33,  36,  39,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  45,  48,  51,  54,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,  57,  57,  57,  57,  57,  57,  57,
+			57,
+		},
+		{	/* Fourth byte table 25. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   2,
+			2,   2,   2,   3,   5,   5,   5,   5,
+			5,   5,   5,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,
+		},
+		{	/* Fourth byte table 26. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,
+		},
+		{	/* Fourth byte table 27. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,
+		},
+		{	/* Fourth byte table 28. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   3,
+			6,   9,   12,  15,  18,  21,  24,  27,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,
+		},
+		{	/* Fourth byte table 29. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,
+		},
+		{	/* Fourth byte table 30. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 117,
+			120, 123, 126, 129, 132, 135, 138, 141,
+			141, 141, 141, 141, 141, 141, 141, 141,
+			141, 141, 141, 141, 141, 141, 141, 141,
+			141, 141, 141, 141, 141, 141, 141, 141,
+			141, 141, 141, 141, 141, 141, 141, 141,
+			141, 141, 141, 141, 141, 141, 141, 141,
+			141, 141, 141, 141, 141, 141, 141, 141,
+			141, 141, 141, 141, 141, 141, 141, 141,
+			141, 141, 141, 141, 141, 141, 141, 141,
+			141, 141, 141, 141, 141, 141, 141, 141,
+			141, 141, 141, 141, 141, 141, 141, 141,
+			141,
+		},
+		{	/* Fourth byte table 31. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   5,   8,   10,  10,  10,
+			13,  13,  16,  16,  19,  19,  19,  19,
+			19,  19,  19,  19,  19,  19,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,  22,  22,  22,  22,  22,  22,  22,
+			22,
+		},
+		{	/* Fourth byte table 32. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   6,   6,   9,   9,   12,
+			12,  15,  15,  18,  18,  21,  21,  24,
+			24,  27,  27,  30,  30,  33,  33,  36,
+			36,  39,  39,  42,  42,  45,  45,  48,
+			48,  51,  51,  54,  54,  57,  57,  60,
+			60,  63,  63,  66,  66,  69,  69,  72,
+			72,  75,  75,  78,  78,  81,  81,  84,
+			84,  87,  87,  90,  90,  93,  93,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 33. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   3,   6,   6,   9,   9,   12,
+			12,  15,  15,  18,  18,  21,  21,  24,
+			24,  27,  27,  30,  30,  33,  33,  36,
+			36,  39,  39,  42,  42,  45,  45,  48,
+			48,  51,  51,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,
+		},
+		{	/* Fourth byte table 34. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   6,   9,   12,  15,  18,
+			21,  24,  27,  30,  33,  36,  39,  42,
+			45,  48,  51,  54,  57,  60,  63,  66,
+			69,  72,  75,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,
+		},
+		{	/* Fourth byte table 35. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  68,  72,  76,  80,  84,  88,  92,
+			96,  100, 104, 108, 112, 116, 120, 124,
+			128, 132, 136, 140, 144, 148, 152, 156,
+			160, 160, 160, 160, 160, 160, 160, 160,
+			160, 160, 160, 160, 160, 160, 160, 160,
+			160, 160, 160, 160, 160, 160, 160, 160,
+			160, 160, 160, 160, 160, 160, 160, 160,
+			160, 160, 160, 160, 160, 160, 160, 160,
+			160, 160, 160, 160, 160, 160, 160, 160,
+			160, 160, 160, 160, 160, 160, 160, 160,
+			160, 160, 160, 160, 160, 160, 160, 160,
+			160, 160, 160, 160, 160, 160, 160, 160,
+			160, 160, 160, 160, 160, 160, 160, 160,
+			160, 160, 160, 160, 160, 160, 160, 160,
+			160,
+		},
+	},
+};
+
+static const uchar_t u8_tolower_final_tbl[2][2299] = {
+	{
+		0xC3, 0xA0, 0xC3, 0xA1, 0xC3, 0xA2, 0xC3, 0xA3,
+		0xC3, 0xA4, 0xC3, 0xA5, 0xC3, 0xA6, 0xC3, 0xA7,
+		0xC3, 0xA8, 0xC3, 0xA9, 0xC3, 0xAA, 0xC3, 0xAB,
+		0xC3, 0xAC, 0xC3, 0xAD, 0xC3, 0xAE, 0xC3, 0xAF,
+		0xC3, 0xB0, 0xC3, 0xB1, 0xC3, 0xB2, 0xC3, 0xB3,
+		0xC3, 0xB4, 0xC3, 0xB5, 0xC3, 0xB6, 0xC3, 0xB8,
+		0xC3, 0xB9, 0xC3, 0xBA, 0xC3, 0xBB, 0xC3, 0xBC,
+		0xC3, 0xBD, 0xC3, 0xBE, 0xC4, 0x81, 0xC4, 0x83,
+		0xC4, 0x85, 0xC4, 0x87, 0xC4, 0x89, 0xC4, 0x8B,
+		0xC4, 0x8D, 0xC4, 0x8F, 0xC4, 0x91, 0xC4, 0x93,
+		0xC4, 0x95, 0xC4, 0x97, 0xC4, 0x99, 0xC4, 0x9B,
+		0xC4, 0x9D, 0xC4, 0x9F, 0xC4, 0xA1, 0xC4, 0xA3,
+		0xC4, 0xA5, 0xC4, 0xA7, 0xC4, 0xA9, 0xC4, 0xAB,
+		0xC4, 0xAD, 0xC4, 0xAF, 0x69, 0xC4, 0xB3, 0xC4,
+		0xB5, 0xC4, 0xB7, 0xC4, 0xBA, 0xC4, 0xBC, 0xC4,
+		0xBE, 0xC5, 0x80, 0xC5, 0x82, 0xC5, 0x84, 0xC5,
+		0x86, 0xC5, 0x88, 0xC5, 0x8B, 0xC5, 0x8D, 0xC5,
+		0x8F, 0xC5, 0x91, 0xC5, 0x93, 0xC5, 0x95, 0xC5,
+		0x97, 0xC5, 0x99, 0xC5, 0x9B, 0xC5, 0x9D, 0xC5,
+		0x9F, 0xC5, 0xA1, 0xC5, 0xA3, 0xC5, 0xA5, 0xC5,
+		0xA7, 0xC5, 0xA9, 0xC5, 0xAB, 0xC5, 0xAD, 0xC5,
+		0xAF, 0xC5, 0xB1, 0xC5, 0xB3, 0xC5, 0xB5, 0xC5,
+		0xB7, 0xC3, 0xBF, 0xC5, 0xBA, 0xC5, 0xBC, 0xC5,
+		0xBE, 0xC9, 0x93, 0xC6, 0x83, 0xC6, 0x85, 0xC9,
+		0x94, 0xC6, 0x88, 0xC9, 0x96, 0xC9, 0x97, 0xC6,
+		0x8C, 0xC7, 0x9D, 0xC9, 0x99, 0xC9, 0x9B, 0xC6,
+		0x92, 0xC9, 0xA0, 0xC9, 0xA3, 0xC9, 0xA9, 0xC9,
+		0xA8, 0xC6, 0x99, 0xC9, 0xAF, 0xC9, 0xB2, 0xC9,
+		0xB5, 0xC6, 0xA1, 0xC6, 0xA3, 0xC6, 0xA5, 0xCA,
+		0x80, 0xC6, 0xA8, 0xCA, 0x83, 0xC6, 0xAD, 0xCA,
+		0x88, 0xC6, 0xB0, 0xCA, 0x8A, 0xCA, 0x8B, 0xC6,
+		0xB4, 0xC6, 0xB6, 0xCA, 0x92, 0xC6, 0xB9, 0xC6,
+		0xBD, 0xC7, 0x86, 0xC7, 0x86, 0xC7, 0x89, 0xC7,
+		0x89, 0xC7, 0x8C, 0xC7, 0x8C, 0xC7, 0x8E, 0xC7,
+		0x90, 0xC7, 0x92, 0xC7, 0x94, 0xC7, 0x96, 0xC7,
+		0x98, 0xC7, 0x9A, 0xC7, 0x9C, 0xC7, 0x9F, 0xC7,
+		0xA1, 0xC7, 0xA3, 0xC7, 0xA5, 0xC7, 0xA7, 0xC7,
+		0xA9, 0xC7, 0xAB, 0xC7, 0xAD, 0xC7, 0xAF, 0xC7,
+		0xB3, 0xC7, 0xB3, 0xC7, 0xB5, 0xC6, 0x95, 0xC6,
+		0xBF, 0xC7, 0xB9, 0xC7, 0xBB, 0xC7, 0xBD, 0xC7,
+		0xBF, 0xC8, 0x81, 0xC8, 0x83, 0xC8, 0x85, 0xC8,
+		0x87, 0xC8, 0x89, 0xC8, 0x8B, 0xC8, 0x8D, 0xC8,
+		0x8F, 0xC8, 0x91, 0xC8, 0x93, 0xC8, 0x95, 0xC8,
+		0x97, 0xC8, 0x99, 0xC8, 0x9B, 0xC8, 0x9D, 0xC8,
+		0x9F, 0xC6, 0x9E, 0xC8, 0xA3, 0xC8, 0xA5, 0xC8,
+		0xA7, 0xC8, 0xA9, 0xC8, 0xAB, 0xC8, 0xAD, 0xC8,
+		0xAF, 0xC8, 0xB1, 0xC8, 0xB3, 0xCE, 0xAC, 0xCE,
+		0xAD, 0xCE, 0xAE, 0xCE, 0xAF, 0xCF, 0x8C, 0xCF,
+		0x8D, 0xCF, 0x8E, 0xCE, 0xB1, 0xCE, 0xB2, 0xCE,
+		0xB3, 0xCE, 0xB4, 0xCE, 0xB5, 0xCE, 0xB6, 0xCE,
+		0xB7, 0xCE, 0xB8, 0xCE, 0xB9, 0xCE, 0xBA, 0xCE,
+		0xBB, 0xCE, 0xBC, 0xCE, 0xBD, 0xCE, 0xBE, 0xCE,
+		0xBF, 0xCF, 0x80, 0xCF, 0x81, 0xCF, 0x83, 0xCF,
+		0x84, 0xCF, 0x85, 0xCF, 0x86, 0xCF, 0x87, 0xCF,
+		0x88, 0xCF, 0x89, 0xCF, 0x8A, 0xCF, 0x8B, 0xCF,
+		0x99, 0xCF, 0x9B, 0xCF, 0x9D, 0xCF, 0x9F, 0xCF,
+		0xA1, 0xCF, 0xA3, 0xCF, 0xA5, 0xCF, 0xA7, 0xCF,
+		0xA9, 0xCF, 0xAB, 0xCF, 0xAD, 0xCF, 0xAF, 0xCE,
+		0xB8, 0xD1, 0x90, 0xD1, 0x91, 0xD1, 0x92, 0xD1,
+		0x93, 0xD1, 0x94, 0xD1, 0x95, 0xD1, 0x96, 0xD1,
+		0x97, 0xD1, 0x98, 0xD1, 0x99, 0xD1, 0x9A, 0xD1,
+		0x9B, 0xD1, 0x9C, 0xD1, 0x9D, 0xD1, 0x9E, 0xD1,
+		0x9F, 0xD0, 0xB0, 0xD0, 0xB1, 0xD0, 0xB2, 0xD0,
+		0xB3, 0xD0, 0xB4, 0xD0, 0xB5, 0xD0, 0xB6, 0xD0,
+		0xB7, 0xD0, 0xB8, 0xD0, 0xB9, 0xD0, 0xBA, 0xD0,
+		0xBB, 0xD0, 0xBC, 0xD0, 0xBD, 0xD0, 0xBE, 0xD0,
+		0xBF, 0xD1, 0x80, 0xD1, 0x81, 0xD1, 0x82, 0xD1,
+		0x83, 0xD1, 0x84, 0xD1, 0x85, 0xD1, 0x86, 0xD1,
+		0x87, 0xD1, 0x88, 0xD1, 0x89, 0xD1, 0x8A, 0xD1,
+		0x8B, 0xD1, 0x8C, 0xD1, 0x8D, 0xD1, 0x8E, 0xD1,
+		0x8F, 0xD1, 0xA1, 0xD1, 0xA3, 0xD1, 0xA5, 0xD1,
+		0xA7, 0xD1, 0xA9, 0xD1, 0xAB, 0xD1, 0xAD, 0xD1,
+		0xAF, 0xD1, 0xB1, 0xD1, 0xB3, 0xD1, 0xB5, 0xD1,
+		0xB7, 0xD1, 0xB9, 0xD1, 0xBB, 0xD1, 0xBD, 0xD1,
+		0xBF, 0xD2, 0x81, 0xD2, 0x8B, 0xD2, 0x8D, 0xD2,
+		0x8F, 0xD2, 0x91, 0xD2, 0x93, 0xD2, 0x95, 0xD2,
+		0x97, 0xD2, 0x99, 0xD2, 0x9B, 0xD2, 0x9D, 0xD2,
+		0x9F, 0xD2, 0xA1, 0xD2, 0xA3, 0xD2, 0xA5, 0xD2,
+		0xA7, 0xD2, 0xA9, 0xD2, 0xAB, 0xD2, 0xAD, 0xD2,
+		0xAF, 0xD2, 0xB1, 0xD2, 0xB3, 0xD2, 0xB5, 0xD2,
+		0xB7, 0xD2, 0xB9, 0xD2, 0xBB, 0xD2, 0xBD, 0xD2,
+		0xBF, 0xD3, 0x82, 0xD3, 0x84, 0xD3, 0x86, 0xD3,
+		0x88, 0xD3, 0x8A, 0xD3, 0x8C, 0xD3, 0x8E, 0xD3,
+		0x91, 0xD3, 0x93, 0xD3, 0x95, 0xD3, 0x97, 0xD3,
+		0x99, 0xD3, 0x9B, 0xD3, 0x9D, 0xD3, 0x9F, 0xD3,
+		0xA1, 0xD3, 0xA3, 0xD3, 0xA5, 0xD3, 0xA7, 0xD3,
+		0xA9, 0xD3, 0xAB, 0xD3, 0xAD, 0xD3, 0xAF, 0xD3,
+		0xB1, 0xD3, 0xB3, 0xD3, 0xB5, 0xD3, 0xB9, 0xD4,
+		0x81, 0xD4, 0x83, 0xD4, 0x85, 0xD4, 0x87, 0xD4,
+		0x89, 0xD4, 0x8B, 0xD4, 0x8D, 0xD4, 0x8F, 0xD5,
+		0xA1, 0xD5, 0xA2, 0xD5, 0xA3, 0xD5, 0xA4, 0xD5,
+		0xA5, 0xD5, 0xA6, 0xD5, 0xA7, 0xD5, 0xA8, 0xD5,
+		0xA9, 0xD5, 0xAA, 0xD5, 0xAB, 0xD5, 0xAC, 0xD5,
+		0xAD, 0xD5, 0xAE, 0xD5, 0xAF, 0xD5, 0xB0, 0xD5,
+		0xB1, 0xD5, 0xB2, 0xD5, 0xB3, 0xD5, 0xB4, 0xD5,
+		0xB5, 0xD5, 0xB6, 0xD5, 0xB7, 0xD5, 0xB8, 0xD5,
+		0xB9, 0xD5, 0xBA, 0xD5, 0xBB, 0xD5, 0xBC, 0xD5,
+		0xBD, 0xD5, 0xBE, 0xD5, 0xBF, 0xD6, 0x80, 0xD6,
+		0x81, 0xD6, 0x82, 0xD6, 0x83, 0xD6, 0x84, 0xD6,
+		0x85, 0xD6, 0x86, 0xE1, 0xB8, 0x81, 0xE1, 0xB8,
+		0x83, 0xE1, 0xB8, 0x85, 0xE1, 0xB8, 0x87, 0xE1,
+		0xB8, 0x89, 0xE1, 0xB8, 0x8B, 0xE1, 0xB8, 0x8D,
+		0xE1, 0xB8, 0x8F, 0xE1, 0xB8, 0x91, 0xE1, 0xB8,
+		0x93, 0xE1, 0xB8, 0x95, 0xE1, 0xB8, 0x97, 0xE1,
+		0xB8, 0x99, 0xE1, 0xB8, 0x9B, 0xE1, 0xB8, 0x9D,
+		0xE1, 0xB8, 0x9F, 0xE1, 0xB8, 0xA1, 0xE1, 0xB8,
+		0xA3, 0xE1, 0xB8, 0xA5, 0xE1, 0xB8, 0xA7, 0xE1,
+		0xB8, 0xA9, 0xE1, 0xB8, 0xAB, 0xE1, 0xB8, 0xAD,
+		0xE1, 0xB8, 0xAF, 0xE1, 0xB8, 0xB1, 0xE1, 0xB8,
+		0xB3, 0xE1, 0xB8, 0xB5, 0xE1, 0xB8, 0xB7, 0xE1,
+		0xB8, 0xB9, 0xE1, 0xB8, 0xBB, 0xE1, 0xB8, 0xBD,
+		0xE1, 0xB8, 0xBF, 0xE1, 0xB9, 0x81, 0xE1, 0xB9,
+		0x83, 0xE1, 0xB9, 0x85, 0xE1, 0xB9, 0x87, 0xE1,
+		0xB9, 0x89, 0xE1, 0xB9, 0x8B, 0xE1, 0xB9, 0x8D,
+		0xE1, 0xB9, 0x8F, 0xE1, 0xB9, 0x91, 0xE1, 0xB9,
+		0x93, 0xE1, 0xB9, 0x95, 0xE1, 0xB9, 0x97, 0xE1,
+		0xB9, 0x99, 0xE1, 0xB9, 0x9B, 0xE1, 0xB9, 0x9D,
+		0xE1, 0xB9, 0x9F, 0xE1, 0xB9, 0xA1, 0xE1, 0xB9,
+		0xA3, 0xE1, 0xB9, 0xA5, 0xE1, 0xB9, 0xA7, 0xE1,
+		0xB9, 0xA9, 0xE1, 0xB9, 0xAB, 0xE1, 0xB9, 0xAD,
+		0xE1, 0xB9, 0xAF, 0xE1, 0xB9, 0xB1, 0xE1, 0xB9,
+		0xB3, 0xE1, 0xB9, 0xB5, 0xE1, 0xB9, 0xB7, 0xE1,
+		0xB9, 0xB9, 0xE1, 0xB9, 0xBB, 0xE1, 0xB9, 0xBD,
+		0xE1, 0xB9, 0xBF, 0xE1, 0xBA, 0x81, 0xE1, 0xBA,
+		0x83, 0xE1, 0xBA, 0x85, 0xE1, 0xBA, 0x87, 0xE1,
+		0xBA, 0x89, 0xE1, 0xBA, 0x8B, 0xE1, 0xBA, 0x8D,
+		0xE1, 0xBA, 0x8F, 0xE1, 0xBA, 0x91, 0xE1, 0xBA,
+		0x93, 0xE1, 0xBA, 0x95, 0xE1, 0xBA, 0xA1, 0xE1,
+		0xBA, 0xA3, 0xE1, 0xBA, 0xA5, 0xE1, 0xBA, 0xA7,
+		0xE1, 0xBA, 0xA9, 0xE1, 0xBA, 0xAB, 0xE1, 0xBA,
+		0xAD, 0xE1, 0xBA, 0xAF, 0xE1, 0xBA, 0xB1, 0xE1,
+		0xBA, 0xB3, 0xE1, 0xBA, 0xB5, 0xE1, 0xBA, 0xB7,
+		0xE1, 0xBA, 0xB9, 0xE1, 0xBA, 0xBB, 0xE1, 0xBA,
+		0xBD, 0xE1, 0xBA, 0xBF, 0xE1, 0xBB, 0x81, 0xE1,
+		0xBB, 0x83, 0xE1, 0xBB, 0x85, 0xE1, 0xBB, 0x87,
+		0xE1, 0xBB, 0x89, 0xE1, 0xBB, 0x8B, 0xE1, 0xBB,
+		0x8D, 0xE1, 0xBB, 0x8F, 0xE1, 0xBB, 0x91, 0xE1,
+		0xBB, 0x93, 0xE1, 0xBB, 0x95, 0xE1, 0xBB, 0x97,
+		0xE1, 0xBB, 0x99, 0xE1, 0xBB, 0x9B, 0xE1, 0xBB,
+		0x9D, 0xE1, 0xBB, 0x9F, 0xE1, 0xBB, 0xA1, 0xE1,
+		0xBB, 0xA3, 0xE1, 0xBB, 0xA5, 0xE1, 0xBB, 0xA7,
+		0xE1, 0xBB, 0xA9, 0xE1, 0xBB, 0xAB, 0xE1, 0xBB,
+		0xAD, 0xE1, 0xBB, 0xAF, 0xE1, 0xBB, 0xB1, 0xE1,
+		0xBB, 0xB3, 0xE1, 0xBB, 0xB5, 0xE1, 0xBB, 0xB7,
+		0xE1, 0xBB, 0xB9, 0xE1, 0xBC, 0x80, 0xE1, 0xBC,
+		0x81, 0xE1, 0xBC, 0x82, 0xE1, 0xBC, 0x83, 0xE1,
+		0xBC, 0x84, 0xE1, 0xBC, 0x85, 0xE1, 0xBC, 0x86,
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+		0x91, 0xE1, 0xBC, 0x92, 0xE1, 0xBC, 0x93, 0xE1,
+		0xBC, 0x94, 0xE1, 0xBC, 0x95, 0xE1, 0xBC, 0xA0,
+		0xE1, 0xBC, 0xA1, 0xE1, 0xBC, 0xA2, 0xE1, 0xBC,
+		0xA3, 0xE1, 0xBC, 0xA4, 0xE1, 0xBC, 0xA5, 0xE1,
+		0xBC, 0xA6, 0xE1, 0xBC, 0xA7, 0xE1, 0xBC, 0xB0,
+		0xE1, 0xBC, 0xB1, 0xE1, 0xBC, 0xB2, 0xE1, 0xBC,
+		0xB3, 0xE1, 0xBC, 0xB4, 0xE1, 0xBC, 0xB5, 0xE1,
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+		0xE1, 0xBD, 0x97, 0xE1, 0xBD, 0xA0, 0xE1, 0xBD,
+		0xA1, 0xE1, 0xBD, 0xA2, 0xE1, 0xBD, 0xA3, 0xE1,
+		0xBD, 0xA4, 0xE1, 0xBD, 0xA5, 0xE1, 0xBD, 0xA6,
+		0xE1, 0xBD, 0xA7, 0xE1, 0xBE, 0x80, 0xE1, 0xBE,
+		0x81, 0xE1, 0xBE, 0x82, 0xE1, 0xBE, 0x83, 0xE1,
+		0xBE, 0x84, 0xE1, 0xBE, 0x85, 0xE1, 0xBE, 0x86,
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+		0x91, 0xE1, 0xBE, 0x92, 0xE1, 0xBE, 0x93, 0xE1,
+		0xBE, 0x94, 0xE1, 0xBE, 0x95, 0xE1, 0xBE, 0x96,
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+		0xA1, 0xE1, 0xBE, 0xA2, 0xE1, 0xBE, 0xA3, 0xE1,
+		0xBE, 0xA4, 0xE1, 0xBE, 0xA5, 0xE1, 0xBE, 0xA6,
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+		0xB1, 0xE1, 0xBD, 0xB0, 0xE1, 0xBD, 0xB1, 0xE1,
+		0xBE, 0xB3, 0xE1, 0xBD, 0xB2, 0xE1, 0xBD, 0xB3,
+		0xE1, 0xBD, 0xB4, 0xE1, 0xBD, 0xB5, 0xE1, 0xBF,
+		0x83, 0xE1, 0xBF, 0x90, 0xE1, 0xBF, 0x91, 0xE1,
+		0xBD, 0xB6, 0xE1, 0xBD, 0xB7, 0xE1, 0xBF, 0xA0,
+		0xE1, 0xBF, 0xA1, 0xE1, 0xBD, 0xBA, 0xE1, 0xBD,
+		0xBB, 0xE1, 0xBF, 0xA5, 0xE1, 0xBD, 0xB8, 0xE1,
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+		0xB2, 0xE2, 0x85, 0xB3, 0xE2, 0x85, 0xB4, 0xE2,
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+		0xE2, 0x93, 0xA0, 0xE2, 0x93, 0xA1, 0xE2, 0x93,
+		0xA2, 0xE2, 0x93, 0xA3, 0xE2, 0x93, 0xA4, 0xE2,
+		0x93, 0xA5, 0xE2, 0x93, 0xA6, 0xE2, 0x93, 0xA7,
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+		0x81, 0xEF, 0xBD, 0x82, 0xEF, 0xBD, 0x83, 0xEF,
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+		0xF0, 0x90, 0x91, 0x87, 0xF0, 0x90, 0x91, 0x88,
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+		0,    0,    0,    0,    0,    0,    0,    0,
+		0,    0,    0,
+	},
+	{
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+		0xAF, 0xCF, 0x8C, 0xCF, 0x8D, 0xCF, 0x8E, 0xCE,
+		0xB1, 0xCE, 0xB2, 0xCE, 0xB3, 0xCE, 0xB4, 0xCE,
+		0xB5, 0xCE, 0xB6, 0xCE, 0xB7, 0xCE, 0xB8, 0xCE,
+		0xB9, 0xCE, 0xBA, 0xCE, 0xBB, 0xCE, 0xBC, 0xCE,
+		0xBD, 0xCE, 0xBE, 0xCE, 0xBF, 0xCF, 0x80, 0xCF,
+		0x81, 0xCF, 0x83, 0xCF, 0x84, 0xCF, 0x85, 0xCF,
+		0x86, 0xCF, 0x87, 0xCF, 0x88, 0xCF, 0x89, 0xCF,
+		0x8A, 0xCF, 0x8B, 0xCF, 0x99, 0xCF, 0x9B, 0xCF,
+		0x9D, 0xCF, 0x9F, 0xCF, 0xA1, 0xCF, 0xA3, 0xCF,
+		0xA5, 0xCF, 0xA7, 0xCF, 0xA9, 0xCF, 0xAB, 0xCF,
+		0xAD, 0xCF, 0xAF, 0xCE, 0xB8, 0xCF, 0xB8, 0xCF,
+		0xB2, 0xCF, 0xBB, 0xCD, 0xBB, 0xCD, 0xBC, 0xCD,
+		0xBD, 0xD1, 0x90, 0xD1, 0x91, 0xD1, 0x92, 0xD1,
+		0x93, 0xD1, 0x94, 0xD1, 0x95, 0xD1, 0x96, 0xD1,
+		0x97, 0xD1, 0x98, 0xD1, 0x99, 0xD1, 0x9A, 0xD1,
+		0x9B, 0xD1, 0x9C, 0xD1, 0x9D, 0xD1, 0x9E, 0xD1,
+		0x9F, 0xD0, 0xB0, 0xD0, 0xB1, 0xD0, 0xB2, 0xD0,
+		0xB3, 0xD0, 0xB4, 0xD0, 0xB5, 0xD0, 0xB6, 0xD0,
+		0xB7, 0xD0, 0xB8, 0xD0, 0xB9, 0xD0, 0xBA, 0xD0,
+		0xBB, 0xD0, 0xBC, 0xD0, 0xBD, 0xD0, 0xBE, 0xD0,
+		0xBF, 0xD1, 0x80, 0xD1, 0x81, 0xD1, 0x82, 0xD1,
+		0x83, 0xD1, 0x84, 0xD1, 0x85, 0xD1, 0x86, 0xD1,
+		0x87, 0xD1, 0x88, 0xD1, 0x89, 0xD1, 0x8A, 0xD1,
+		0x8B, 0xD1, 0x8C, 0xD1, 0x8D, 0xD1, 0x8E, 0xD1,
+		0x8F, 0xD1, 0xA1, 0xD1, 0xA3, 0xD1, 0xA5, 0xD1,
+		0xA7, 0xD1, 0xA9, 0xD1, 0xAB, 0xD1, 0xAD, 0xD1,
+		0xAF, 0xD1, 0xB1, 0xD1, 0xB3, 0xD1, 0xB5, 0xD1,
+		0xB7, 0xD1, 0xB9, 0xD1, 0xBB, 0xD1, 0xBD, 0xD1,
+		0xBF, 0xD2, 0x81, 0xD2, 0x8B, 0xD2, 0x8D, 0xD2,
+		0x8F, 0xD2, 0x91, 0xD2, 0x93, 0xD2, 0x95, 0xD2,
+		0x97, 0xD2, 0x99, 0xD2, 0x9B, 0xD2, 0x9D, 0xD2,
+		0x9F, 0xD2, 0xA1, 0xD2, 0xA3, 0xD2, 0xA5, 0xD2,
+		0xA7, 0xD2, 0xA9, 0xD2, 0xAB, 0xD2, 0xAD, 0xD2,
+		0xAF, 0xD2, 0xB1, 0xD2, 0xB3, 0xD2, 0xB5, 0xD2,
+		0xB7, 0xD2, 0xB9, 0xD2, 0xBB, 0xD2, 0xBD, 0xD2,
+		0xBF, 0xD3, 0x8F, 0xD3, 0x82, 0xD3, 0x84, 0xD3,
+		0x86, 0xD3, 0x88, 0xD3, 0x8A, 0xD3, 0x8C, 0xD3,
+		0x8E, 0xD3, 0x91, 0xD3, 0x93, 0xD3, 0x95, 0xD3,
+		0x97, 0xD3, 0x99, 0xD3, 0x9B, 0xD3, 0x9D, 0xD3,
+		0x9F, 0xD3, 0xA1, 0xD3, 0xA3, 0xD3, 0xA5, 0xD3,
+		0xA7, 0xD3, 0xA9, 0xD3, 0xAB, 0xD3, 0xAD, 0xD3,
+		0xAF, 0xD3, 0xB1, 0xD3, 0xB3, 0xD3, 0xB5, 0xD3,
+		0xB7, 0xD3, 0xB9, 0xD3, 0xBB, 0xD3, 0xBD, 0xD3,
+		0xBF, 0xD4, 0x81, 0xD4, 0x83, 0xD4, 0x85, 0xD4,
+		0x87, 0xD4, 0x89, 0xD4, 0x8B, 0xD4, 0x8D, 0xD4,
+		0x8F, 0xD4, 0x91, 0xD4, 0x93, 0xD5, 0xA1, 0xD5,
+		0xA2, 0xD5, 0xA3, 0xD5, 0xA4, 0xD5, 0xA5, 0xD5,
+		0xA6, 0xD5, 0xA7, 0xD5, 0xA8, 0xD5, 0xA9, 0xD5,
+		0xAA, 0xD5, 0xAB, 0xD5, 0xAC, 0xD5, 0xAD, 0xD5,
+		0xAE, 0xD5, 0xAF, 0xD5, 0xB0, 0xD5, 0xB1, 0xD5,
+		0xB2, 0xD5, 0xB3, 0xD5, 0xB4, 0xD5, 0xB5, 0xD5,
+		0xB6, 0xD5, 0xB7, 0xD5, 0xB8, 0xD5, 0xB9, 0xD5,
+		0xBA, 0xD5, 0xBB, 0xD5, 0xBC, 0xD5, 0xBD, 0xD5,
+		0xBE, 0xD5, 0xBF, 0xD6, 0x80, 0xD6, 0x81, 0xD6,
+		0x82, 0xD6, 0x83, 0xD6, 0x84, 0xD6, 0x85, 0xD6,
+		0x86, 0xE2, 0xB4, 0x80, 0xE2, 0xB4, 0x81, 0xE2,
+		0xB4, 0x82, 0xE2, 0xB4, 0x83, 0xE2, 0xB4, 0x84,
+		0xE2, 0xB4, 0x85, 0xE2, 0xB4, 0x86, 0xE2, 0xB4,
+		0x87, 0xE2, 0xB4, 0x88, 0xE2, 0xB4, 0x89, 0xE2,
+		0xB4, 0x8A, 0xE2, 0xB4, 0x8B, 0xE2, 0xB4, 0x8C,
+		0xE2, 0xB4, 0x8D, 0xE2, 0xB4, 0x8E, 0xE2, 0xB4,
+		0x8F, 0xE2, 0xB4, 0x90, 0xE2, 0xB4, 0x91, 0xE2,
+		0xB4, 0x92, 0xE2, 0xB4, 0x93, 0xE2, 0xB4, 0x94,
+		0xE2, 0xB4, 0x95, 0xE2, 0xB4, 0x96, 0xE2, 0xB4,
+		0x97, 0xE2, 0xB4, 0x98, 0xE2, 0xB4, 0x99, 0xE2,
+		0xB4, 0x9A, 0xE2, 0xB4, 0x9B, 0xE2, 0xB4, 0x9C,
+		0xE2, 0xB4, 0x9D, 0xE2, 0xB4, 0x9E, 0xE2, 0xB4,
+		0x9F, 0xE2, 0xB4, 0xA0, 0xE2, 0xB4, 0xA1, 0xE2,
+		0xB4, 0xA2, 0xE2, 0xB4, 0xA3, 0xE2, 0xB4, 0xA4,
+		0xE2, 0xB4, 0xA5, 0xE1, 0xB8, 0x81, 0xE1, 0xB8,
+		0x83, 0xE1, 0xB8, 0x85, 0xE1, 0xB8, 0x87, 0xE1,
+		0xB8, 0x89, 0xE1, 0xB8, 0x8B, 0xE1, 0xB8, 0x8D,
+		0xE1, 0xB8, 0x8F, 0xE1, 0xB8, 0x91, 0xE1, 0xB8,
+		0x93, 0xE1, 0xB8, 0x95, 0xE1, 0xB8, 0x97, 0xE1,
+		0xB8, 0x99, 0xE1, 0xB8, 0x9B, 0xE1, 0xB8, 0x9D,
+		0xE1, 0xB8, 0x9F, 0xE1, 0xB8, 0xA1, 0xE1, 0xB8,
+		0xA3, 0xE1, 0xB8, 0xA5, 0xE1, 0xB8, 0xA7, 0xE1,
+		0xB8, 0xA9, 0xE1, 0xB8, 0xAB, 0xE1, 0xB8, 0xAD,
+		0xE1, 0xB8, 0xAF, 0xE1, 0xB8, 0xB1, 0xE1, 0xB8,
+		0xB3, 0xE1, 0xB8, 0xB5, 0xE1, 0xB8, 0xB7, 0xE1,
+		0xB8, 0xB9, 0xE1, 0xB8, 0xBB, 0xE1, 0xB8, 0xBD,
+		0xE1, 0xB8, 0xBF, 0xE1, 0xB9, 0x81, 0xE1, 0xB9,
+		0x83, 0xE1, 0xB9, 0x85, 0xE1, 0xB9, 0x87, 0xE1,
+		0xB9, 0x89, 0xE1, 0xB9, 0x8B, 0xE1, 0xB9, 0x8D,
+		0xE1, 0xB9, 0x8F, 0xE1, 0xB9, 0x91, 0xE1, 0xB9,
+		0x93, 0xE1, 0xB9, 0x95, 0xE1, 0xB9, 0x97, 0xE1,
+		0xB9, 0x99, 0xE1, 0xB9, 0x9B, 0xE1, 0xB9, 0x9D,
+		0xE1, 0xB9, 0x9F, 0xE1, 0xB9, 0xA1, 0xE1, 0xB9,
+		0xA3, 0xE1, 0xB9, 0xA5, 0xE1, 0xB9, 0xA7, 0xE1,
+		0xB9, 0xA9, 0xE1, 0xB9, 0xAB, 0xE1, 0xB9, 0xAD,
+		0xE1, 0xB9, 0xAF, 0xE1, 0xB9, 0xB1, 0xE1, 0xB9,
+		0xB3, 0xE1, 0xB9, 0xB5, 0xE1, 0xB9, 0xB7, 0xE1,
+		0xB9, 0xB9, 0xE1, 0xB9, 0xBB, 0xE1, 0xB9, 0xBD,
+		0xE1, 0xB9, 0xBF, 0xE1, 0xBA, 0x81, 0xE1, 0xBA,
+		0x83, 0xE1, 0xBA, 0x85, 0xE1, 0xBA, 0x87, 0xE1,
+		0xBA, 0x89, 0xE1, 0xBA, 0x8B, 0xE1, 0xBA, 0x8D,
+		0xE1, 0xBA, 0x8F, 0xE1, 0xBA, 0x91, 0xE1, 0xBA,
+		0x93, 0xE1, 0xBA, 0x95, 0xE1, 0xBA, 0xA1, 0xE1,
+		0xBA, 0xA3, 0xE1, 0xBA, 0xA5, 0xE1, 0xBA, 0xA7,
+		0xE1, 0xBA, 0xA9, 0xE1, 0xBA, 0xAB, 0xE1, 0xBA,
+		0xAD, 0xE1, 0xBA, 0xAF, 0xE1, 0xBA, 0xB1, 0xE1,
+		0xBA, 0xB3, 0xE1, 0xBA, 0xB5, 0xE1, 0xBA, 0xB7,
+		0xE1, 0xBA, 0xB9, 0xE1, 0xBA, 0xBB, 0xE1, 0xBA,
+		0xBD, 0xE1, 0xBA, 0xBF, 0xE1, 0xBB, 0x81, 0xE1,
+		0xBB, 0x83, 0xE1, 0xBB, 0x85, 0xE1, 0xBB, 0x87,
+		0xE1, 0xBB, 0x89, 0xE1, 0xBB, 0x8B, 0xE1, 0xBB,
+		0x8D, 0xE1, 0xBB, 0x8F, 0xE1, 0xBB, 0x91, 0xE1,
+		0xBB, 0x93, 0xE1, 0xBB, 0x95, 0xE1, 0xBB, 0x97,
+		0xE1, 0xBB, 0x99, 0xE1, 0xBB, 0x9B, 0xE1, 0xBB,
+		0x9D, 0xE1, 0xBB, 0x9F, 0xE1, 0xBB, 0xA1, 0xE1,
+		0xBB, 0xA3, 0xE1, 0xBB, 0xA5, 0xE1, 0xBB, 0xA7,
+		0xE1, 0xBB, 0xA9, 0xE1, 0xBB, 0xAB, 0xE1, 0xBB,
+		0xAD, 0xE1, 0xBB, 0xAF, 0xE1, 0xBB, 0xB1, 0xE1,
+		0xBB, 0xB3, 0xE1, 0xBB, 0xB5, 0xE1, 0xBB, 0xB7,
+		0xE1, 0xBB, 0xB9, 0xE1, 0xBC, 0x80, 0xE1, 0xBC,
+		0x81, 0xE1, 0xBC, 0x82, 0xE1, 0xBC, 0x83, 0xE1,
+		0xBC, 0x84, 0xE1, 0xBC, 0x85, 0xE1, 0xBC, 0x86,
+		0xE1, 0xBC, 0x87, 0xE1, 0xBC, 0x90, 0xE1, 0xBC,
+		0x91, 0xE1, 0xBC, 0x92, 0xE1, 0xBC, 0x93, 0xE1,
+		0xBC, 0x94, 0xE1, 0xBC, 0x95, 0xE1, 0xBC, 0xA0,
+		0xE1, 0xBC, 0xA1, 0xE1, 0xBC, 0xA2, 0xE1, 0xBC,
+		0xA3, 0xE1, 0xBC, 0xA4, 0xE1, 0xBC, 0xA5, 0xE1,
+		0xBC, 0xA6, 0xE1, 0xBC, 0xA7, 0xE1, 0xBC, 0xB0,
+		0xE1, 0xBC, 0xB1, 0xE1, 0xBC, 0xB2, 0xE1, 0xBC,
+		0xB3, 0xE1, 0xBC, 0xB4, 0xE1, 0xBC, 0xB5, 0xE1,
+		0xBC, 0xB6, 0xE1, 0xBC, 0xB7, 0xE1, 0xBD, 0x80,
+		0xE1, 0xBD, 0x81, 0xE1, 0xBD, 0x82, 0xE1, 0xBD,
+		0x83, 0xE1, 0xBD, 0x84, 0xE1, 0xBD, 0x85, 0xE1,
+		0xBD, 0x91, 0xE1, 0xBD, 0x93, 0xE1, 0xBD, 0x95,
+		0xE1, 0xBD, 0x97, 0xE1, 0xBD, 0xA0, 0xE1, 0xBD,
+		0xA1, 0xE1, 0xBD, 0xA2, 0xE1, 0xBD, 0xA3, 0xE1,
+		0xBD, 0xA4, 0xE1, 0xBD, 0xA5, 0xE1, 0xBD, 0xA6,
+		0xE1, 0xBD, 0xA7, 0xE1, 0xBE, 0x80, 0xE1, 0xBE,
+		0x81, 0xE1, 0xBE, 0x82, 0xE1, 0xBE, 0x83, 0xE1,
+		0xBE, 0x84, 0xE1, 0xBE, 0x85, 0xE1, 0xBE, 0x86,
+		0xE1, 0xBE, 0x87, 0xE1, 0xBE, 0x90, 0xE1, 0xBE,
+		0x91, 0xE1, 0xBE, 0x92, 0xE1, 0xBE, 0x93, 0xE1,
+		0xBE, 0x94, 0xE1, 0xBE, 0x95, 0xE1, 0xBE, 0x96,
+		0xE1, 0xBE, 0x97, 0xE1, 0xBE, 0xA0, 0xE1, 0xBE,
+		0xA1, 0xE1, 0xBE, 0xA2, 0xE1, 0xBE, 0xA3, 0xE1,
+		0xBE, 0xA4, 0xE1, 0xBE, 0xA5, 0xE1, 0xBE, 0xA6,
+		0xE1, 0xBE, 0xA7, 0xE1, 0xBE, 0xB0, 0xE1, 0xBE,
+		0xB1, 0xE1, 0xBD, 0xB0, 0xE1, 0xBD, 0xB1, 0xE1,
+		0xBE, 0xB3, 0xE1, 0xBD, 0xB2, 0xE1, 0xBD, 0xB3,
+		0xE1, 0xBD, 0xB4, 0xE1, 0xBD, 0xB5, 0xE1, 0xBF,
+		0x83, 0xE1, 0xBF, 0x90, 0xE1, 0xBF, 0x91, 0xE1,
+		0xBD, 0xB6, 0xE1, 0xBD, 0xB7, 0xE1, 0xBF, 0xA0,
+		0xE1, 0xBF, 0xA1, 0xE1, 0xBD, 0xBA, 0xE1, 0xBD,
+		0xBB, 0xE1, 0xBF, 0xA5, 0xE1, 0xBD, 0xB8, 0xE1,
+		0xBD, 0xB9, 0xE1, 0xBD, 0xBC, 0xE1, 0xBD, 0xBD,
+		0xE1, 0xBF, 0xB3, 0xCF, 0x89, 0x6B, 0xC3, 0xA5,
+		0xE2, 0x85, 0x8E, 0xE2, 0x85, 0xB0, 0xE2, 0x85,
+		0xB1, 0xE2, 0x85, 0xB2, 0xE2, 0x85, 0xB3, 0xE2,
+		0x85, 0xB4, 0xE2, 0x85, 0xB5, 0xE2, 0x85, 0xB6,
+		0xE2, 0x85, 0xB7, 0xE2, 0x85, 0xB8, 0xE2, 0x85,
+		0xB9, 0xE2, 0x85, 0xBA, 0xE2, 0x85, 0xBB, 0xE2,
+		0x85, 0xBC, 0xE2, 0x85, 0xBD, 0xE2, 0x85, 0xBE,
+		0xE2, 0x85, 0xBF, 0xE2, 0x86, 0x84, 0xE2, 0x93,
+		0x90, 0xE2, 0x93, 0x91, 0xE2, 0x93, 0x92, 0xE2,
+		0x93, 0x93, 0xE2, 0x93, 0x94, 0xE2, 0x93, 0x95,
+		0xE2, 0x93, 0x96, 0xE2, 0x93, 0x97, 0xE2, 0x93,
+		0x98, 0xE2, 0x93, 0x99, 0xE2, 0x93, 0x9A, 0xE2,
+		0x93, 0x9B, 0xE2, 0x93, 0x9C, 0xE2, 0x93, 0x9D,
+		0xE2, 0x93, 0x9E, 0xE2, 0x93, 0x9F, 0xE2, 0x93,
+		0xA0, 0xE2, 0x93, 0xA1, 0xE2, 0x93, 0xA2, 0xE2,
+		0x93, 0xA3, 0xE2, 0x93, 0xA4, 0xE2, 0x93, 0xA5,
+		0xE2, 0x93, 0xA6, 0xE2, 0x93, 0xA7, 0xE2, 0x93,
+		0xA8, 0xE2, 0x93, 0xA9, 0xE2, 0xB0, 0xB0, 0xE2,
+		0xB0, 0xB1, 0xE2, 0xB0, 0xB2, 0xE2, 0xB0, 0xB3,
+		0xE2, 0xB0, 0xB4, 0xE2, 0xB0, 0xB5, 0xE2, 0xB0,
+		0xB6, 0xE2, 0xB0, 0xB7, 0xE2, 0xB0, 0xB8, 0xE2,
+		0xB0, 0xB9, 0xE2, 0xB0, 0xBA, 0xE2, 0xB0, 0xBB,
+		0xE2, 0xB0, 0xBC, 0xE2, 0xB0, 0xBD, 0xE2, 0xB0,
+		0xBE, 0xE2, 0xB0, 0xBF, 0xE2, 0xB1, 0x80, 0xE2,
+		0xB1, 0x81, 0xE2, 0xB1, 0x82, 0xE2, 0xB1, 0x83,
+		0xE2, 0xB1, 0x84, 0xE2, 0xB1, 0x85, 0xE2, 0xB1,
+		0x86, 0xE2, 0xB1, 0x87, 0xE2, 0xB1, 0x88, 0xE2,
+		0xB1, 0x89, 0xE2, 0xB1, 0x8A, 0xE2, 0xB1, 0x8B,
+		0xE2, 0xB1, 0x8C, 0xE2, 0xB1, 0x8D, 0xE2, 0xB1,
+		0x8E, 0xE2, 0xB1, 0x8F, 0xE2, 0xB1, 0x90, 0xE2,
+		0xB1, 0x91, 0xE2, 0xB1, 0x92, 0xE2, 0xB1, 0x93,
+		0xE2, 0xB1, 0x94, 0xE2, 0xB1, 0x95, 0xE2, 0xB1,
+		0x96, 0xE2, 0xB1, 0x97, 0xE2, 0xB1, 0x98, 0xE2,
+		0xB1, 0x99, 0xE2, 0xB1, 0x9A, 0xE2, 0xB1, 0x9B,
+		0xE2, 0xB1, 0x9C, 0xE2, 0xB1, 0x9D, 0xE2, 0xB1,
+		0x9E, 0xE2, 0xB1, 0xA1, 0xC9, 0xAB, 0xE1, 0xB5,
+		0xBD, 0xC9, 0xBD, 0xE2, 0xB1, 0xA8, 0xE2, 0xB1,
+		0xAA, 0xE2, 0xB1, 0xAC, 0xE2, 0xB1, 0xB6, 0xE2,
+		0xB2, 0x81, 0xE2, 0xB2, 0x83, 0xE2, 0xB2, 0x85,
+		0xE2, 0xB2, 0x87, 0xE2, 0xB2, 0x89, 0xE2, 0xB2,
+		0x8B, 0xE2, 0xB2, 0x8D, 0xE2, 0xB2, 0x8F, 0xE2,
+		0xB2, 0x91, 0xE2, 0xB2, 0x93, 0xE2, 0xB2, 0x95,
+		0xE2, 0xB2, 0x97, 0xE2, 0xB2, 0x99, 0xE2, 0xB2,
+		0x9B, 0xE2, 0xB2, 0x9D, 0xE2, 0xB2, 0x9F, 0xE2,
+		0xB2, 0xA1, 0xE2, 0xB2, 0xA3, 0xE2, 0xB2, 0xA5,
+		0xE2, 0xB2, 0xA7, 0xE2, 0xB2, 0xA9, 0xE2, 0xB2,
+		0xAB, 0xE2, 0xB2, 0xAD, 0xE2, 0xB2, 0xAF, 0xE2,
+		0xB2, 0xB1, 0xE2, 0xB2, 0xB3, 0xE2, 0xB2, 0xB5,
+		0xE2, 0xB2, 0xB7, 0xE2, 0xB2, 0xB9, 0xE2, 0xB2,
+		0xBB, 0xE2, 0xB2, 0xBD, 0xE2, 0xB2, 0xBF, 0xE2,
+		0xB3, 0x81, 0xE2, 0xB3, 0x83, 0xE2, 0xB3, 0x85,
+		0xE2, 0xB3, 0x87, 0xE2, 0xB3, 0x89, 0xE2, 0xB3,
+		0x8B, 0xE2, 0xB3, 0x8D, 0xE2, 0xB3, 0x8F, 0xE2,
+		0xB3, 0x91, 0xE2, 0xB3, 0x93, 0xE2, 0xB3, 0x95,
+		0xE2, 0xB3, 0x97, 0xE2, 0xB3, 0x99, 0xE2, 0xB3,
+		0x9B, 0xE2, 0xB3, 0x9D, 0xE2, 0xB3, 0x9F, 0xE2,
+		0xB3, 0xA1, 0xE2, 0xB3, 0xA3, 0xEF, 0xBD, 0x81,
+		0xEF, 0xBD, 0x82, 0xEF, 0xBD, 0x83, 0xEF, 0xBD,
+		0x84, 0xEF, 0xBD, 0x85, 0xEF, 0xBD, 0x86, 0xEF,
+		0xBD, 0x87, 0xEF, 0xBD, 0x88, 0xEF, 0xBD, 0x89,
+		0xEF, 0xBD, 0x8A, 0xEF, 0xBD, 0x8B, 0xEF, 0xBD,
+		0x8C, 0xEF, 0xBD, 0x8D, 0xEF, 0xBD, 0x8E, 0xEF,
+		0xBD, 0x8F, 0xEF, 0xBD, 0x90, 0xEF, 0xBD, 0x91,
+		0xEF, 0xBD, 0x92, 0xEF, 0xBD, 0x93, 0xEF, 0xBD,
+		0x94, 0xEF, 0xBD, 0x95, 0xEF, 0xBD, 0x96, 0xEF,
+		0xBD, 0x97, 0xEF, 0xBD, 0x98, 0xEF, 0xBD, 0x99,
+		0xEF, 0xBD, 0x9A, 0xF0, 0x90, 0x90, 0xA8, 0xF0,
+		0x90, 0x90, 0xA9, 0xF0, 0x90, 0x90, 0xAA, 0xF0,
+		0x90, 0x90, 0xAB, 0xF0, 0x90, 0x90, 0xAC, 0xF0,
+		0x90, 0x90, 0xAD, 0xF0, 0x90, 0x90, 0xAE, 0xF0,
+		0x90, 0x90, 0xAF, 0xF0, 0x90, 0x90, 0xB0, 0xF0,
+		0x90, 0x90, 0xB1, 0xF0, 0x90, 0x90, 0xB2, 0xF0,
+		0x90, 0x90, 0xB3, 0xF0, 0x90, 0x90, 0xB4, 0xF0,
+		0x90, 0x90, 0xB5, 0xF0, 0x90, 0x90, 0xB6, 0xF0,
+		0x90, 0x90, 0xB7, 0xF0, 0x90, 0x90, 0xB8, 0xF0,
+		0x90, 0x90, 0xB9, 0xF0, 0x90, 0x90, 0xBA, 0xF0,
+		0x90, 0x90, 0xBB, 0xF0, 0x90, 0x90, 0xBC, 0xF0,
+		0x90, 0x90, 0xBD, 0xF0, 0x90, 0x90, 0xBE, 0xF0,
+		0x90, 0x90, 0xBF, 0xF0, 0x90, 0x91, 0x80, 0xF0,
+		0x90, 0x91, 0x81, 0xF0, 0x90, 0x91, 0x82, 0xF0,
+		0x90, 0x91, 0x83, 0xF0, 0x90, 0x91, 0x84, 0xF0,
+		0x90, 0x91, 0x85, 0xF0, 0x90, 0x91, 0x86, 0xF0,
+		0x90, 0x91, 0x87, 0xF0, 0x90, 0x91, 0x88, 0xF0,
+		0x90, 0x91, 0x89, 0xF0, 0x90, 0x91, 0x8A, 0xF0,
+		0x90, 0x91, 0x8B, 0xF0, 0x90, 0x91, 0x8C, 0xF0,
+		0x90, 0x91, 0x8D, 0xF0, 0x90, 0x91, 0x8E, 0xF0,
+		0x90, 0x91, 0x8F,
+	},
+};
+
+static const u8_displacement_t u8_toupper_b3_tbl[2][5][256] = {
+	{
+		{	/* Third byte table 0. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { 0, 0 }, { 1, 2 },
+			{ 2, 64 }, { 3, 125 }, { 4, 188 }, { 5, 226 },
+			{ 6, 288 }, { 7, 338 }, { 8, 364 }, { N_, 0 },
+			{ N_, 0 }, { 9, 376 }, { 10, 378 }, { 11, 416 },
+			{ 12, 486 }, { 13, 518 }, { 14, 614 }, { 15, 670 },
+			{ 16, 724 }, { 17, 740 }, { 18, 802 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+		},
+		{	/* Third byte table 1. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ 19, 816 }, { 20, 912 }, { 21, 1008 }, { 22, 1092 },
+			{ 23, 1179 }, { 24, 1269 }, { 25, 1365 }, { 26, 1448 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+		},
+		{	/* Third byte table 2. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { 27, 1469 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { 28, 1517 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+		},
+		{	/* Third byte table 3. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { 29, 1595 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+		},
+		{	/* Third byte table 4. */
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
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+		},
+	},
+	{
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+		},
+		{	/* Third byte table 2. */
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+		{	/* Third byte table 3. */
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+		{	/* Third byte table 4. */
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+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ 37, 2158 }, { 38, 2254 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+			{ N_, 0 }, { N_, 0 }, { N_, 0 }, { N_, 0 },
+		},
+	},
+};
+
+static const uchar_t u8_toupper_b4_tbl[2][39][257] = {
+	{
+		{	/* Fourth byte table 0. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,
+		},
+		{	/* Fourth byte table 1. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			46,  48,  50,  52,  54,  56,  58,  60,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,
+		},
+		{	/* Fourth byte table 2. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   2,   4,   4,   6,   6,
+			8,   8,   10,  10,  12,  12,  14,  14,
+			16,  16,  18,  18,  20,  20,  22,  22,
+			24,  24,  26,  26,  28,  28,  30,  30,
+			32,  32,  34,  34,  36,  36,  38,  38,
+			40,  40,  42,  42,  44,  44,  46,  46,
+			48,  48,  49,  49,  51,  51,  53,  53,
+			55,  55,  55,  57,  57,  59,  59,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,
+		},
+		{	/* Fourth byte table 3. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  10,  12,  12,  14,  14,
+			16,  16,  18,  18,  20,  20,  22,  22,
+			24,  24,  26,  26,  28,  28,  30,  30,
+			32,  32,  34,  34,  36,  36,  38,  38,
+			40,  40,  42,  42,  44,  44,  46,  46,
+			48,  48,  50,  50,  52,  52,  54,  54,
+			56,  56,  56,  58,  58,  60,  60,  62,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,
+		},
+		{	/* Fourth byte table 4. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   2,   2,   4,   4,
+			4,   6,   6,   6,   6,   8,   8,   8,
+			8,   8,   8,   10,  10,  10,  12,  12,
+			12,  12,  14,  14,  14,  14,  14,  16,
+			16,  16,  18,  18,  20,  20,  22,  22,
+			22,  24,  24,  24,  24,  24,  26,  26,
+			26,  28,  28,  28,  28,  30,  30,  32,
+			32,  32,  34,  34,  34,  34,  36,  36,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,
+		},
+		{	/* Fourth byte table 5. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   2,   4,
+			4,   6,   8,   8,   10,  12,  12,  14,
+			14,  16,  16,  18,  18,  20,  20,  22,
+			22,  24,  24,  26,  26,  28,  30,  30,
+			32,  32,  34,  34,  36,  36,  38,  38,
+			40,  40,  42,  42,  44,  44,  46,  46,
+			48,  48,  48,  50,  52,  52,  54,  54,
+			54,  54,  56,  56,  58,  58,  60,  60,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,
+		},
+		{	/* Fourth byte table 6. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   2,   4,   4,   6,   6,
+			8,   8,   10,  10,  12,  12,  14,  14,
+			16,  16,  18,  18,  20,  20,  22,  22,
+			24,  24,  26,  26,  28,  28,  30,  30,
+			32,  32,  32,  32,  34,  34,  36,  36,
+			38,  38,  40,  40,  42,  42,  44,  44,
+			46,  46,  48,  48,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  50,  50,  50,
+			50,
+		},
+		{	/* Fourth byte table 7. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   2,   4,   4,   6,
+			8,   8,   10,  10,  12,  12,  12,  12,
+			12,  14,  14,  14,  16,  16,  16,  16,
+			16,  18,  20,  20,  20,  20,  20,  20,
+			22,  22,  22,  24,  24,  24,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,  26,  26,  26,  26,  26,  26,  26,
+			26,
+		},
+		{	/* Fourth byte table 8. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   2,   4,   4,   4,   4,
+			4,   6,   6,   8,   10,  10,  10,  10,
+			10,  10,  10,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,  12,  12,  12,  12,  12,  12,  12,
+			12,
+		},
+		{	/* Fourth byte table 9. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,
+		},
+		{	/* Fourth byte table 10. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   2,   4,   6,
+			8,   8,   10,  12,  14,  16,  18,  20,
+			22,  24,  26,  28,  30,  32,  34,  36,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,
+		},
+		{	/* Fourth byte table 11. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			30,  32,  34,  34,  34,  34,  36,  38,
+			38,  38,  40,  40,  42,  42,  44,  44,
+			46,  46,  48,  48,  50,  50,  52,  52,
+			54,  54,  56,  56,  58,  58,  60,  60,
+			62,  64,  66,  68,  68,  68,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,  70,  70,  70,  70,  70,  70,  70,
+			70,
+		},
+		{	/* Fourth byte table 12. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,
+		},
+		{	/* Fourth byte table 13. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			48,  50,  52,  54,  56,  58,  60,  62,
+			64,  64,  66,  66,  68,  68,  70,  70,
+			72,  72,  74,  74,  76,  76,  78,  78,
+			80,  80,  82,  82,  84,  84,  86,  86,
+			88,  88,  90,  90,  92,  92,  94,  94,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 14. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   4,   4,   6,   6,
+			8,   8,   10,  10,  12,  12,  14,  14,
+			16,  16,  18,  18,  20,  20,  22,  22,
+			24,  24,  26,  26,  28,  28,  30,  30,
+			32,  32,  34,  34,  36,  36,  38,  38,
+			40,  40,  42,  42,  44,  44,  46,  46,
+			48,  48,  50,  50,  52,  52,  54,  54,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,
+		},
+		{	/* Fourth byte table 15. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   2,   2,   4,   4,   6,
+			6,   8,   8,   10,  10,  12,  12,  14,
+			14,  14,  16,  16,  18,  18,  20,  20,
+			22,  22,  24,  24,  26,  26,  28,  28,
+			30,  30,  32,  32,  34,  34,  36,  36,
+			38,  38,  40,  40,  42,  42,  44,  44,
+			46,  46,  48,  48,  50,  50,  52,  52,
+			52,  52,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,
+		},
+		{	/* Fourth byte table 16. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   2,   4,   4,   6,   6,
+			8,   8,   10,  10,  12,  12,  14,  14,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,
+		},
+		{	/* Fourth byte table 17. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   4,   6,   8,   10,  12,
+			14,  16,  18,  20,  22,  24,  26,  28,
+			30,  32,  34,  36,  38,  40,  42,  44,
+			46,  48,  50,  52,  54,  56,  58,  60,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,
+		},
+		{	/* Fourth byte table 18. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,
+		},
+		{	/* Fourth byte table 19. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   3,   6,   6,   9,   9,
+			12,  12,  15,  15,  18,  18,  21,  21,
+			24,  24,  27,  27,  30,  30,  33,  33,
+			36,  36,  39,  39,  42,  42,  45,  45,
+			48,  48,  51,  51,  54,  54,  57,  57,
+			60,  60,  63,  63,  66,  66,  69,  69,
+			72,  72,  75,  75,  78,  78,  81,  81,
+			84,  84,  87,  87,  90,  90,  93,  93,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 20. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   3,   6,   6,   9,   9,
+			12,  12,  15,  15,  18,  18,  21,  21,
+			24,  24,  27,  27,  30,  30,  33,  33,
+			36,  36,  39,  39,  42,  42,  45,  45,
+			48,  48,  51,  51,  54,  54,  57,  57,
+			60,  60,  63,  63,  66,  66,  69,  69,
+			72,  72,  75,  75,  78,  78,  81,  81,
+			84,  84,  87,  87,  90,  90,  93,  93,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 21. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   3,   6,   6,   9,   9,
+			12,  12,  15,  15,  18,  18,  21,  21,
+			24,  24,  27,  27,  30,  30,  33,  33,
+			33,  33,  33,  33,  36,  36,  36,  36,
+			36,  36,  39,  39,  42,  42,  45,  45,
+			48,  48,  51,  51,  54,  54,  57,  57,
+			60,  60,  63,  63,  66,  66,  69,  69,
+			72,  72,  75,  75,  78,  78,  81,  81,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,
+		},
+		{	/* Fourth byte table 22. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   3,   6,   6,   9,   9,
+			12,  12,  15,  15,  18,  18,  21,  21,
+			24,  24,  27,  27,  30,  30,  33,  33,
+			36,  36,  39,  39,  42,  42,  45,  45,
+			48,  48,  51,  51,  54,  54,  57,  57,
+			60,  60,  63,  63,  66,  66,  69,  69,
+			72,  72,  75,  75,  78,  78,  81,  81,
+			84,  84,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,
+		},
+		{	/* Fourth byte table 23. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  27,  30,  33,  36,  39,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  45,  48,  51,  54,  57,  60,  63,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  69,  72,  75,  78,  81,  84,  87,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,
+		},
+		{	/* Fourth byte table 24. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  21,  21,  24,  24,  27,  27,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  33,  36,  39,  42,  45,  48,  51,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  57,  60,  63,  66,  69,  72,  75,
+			78,  81,  84,  87,  90,  93,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 25. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  75,  78,  78,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,
+		},
+		{	/* Fourth byte table 26. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   6,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   12,  15,  15,  15,  15,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 27. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,
+		},
+		{	/* Fourth byte table 28. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,
+		},
+		{	/* Fourth byte table 29. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   6,   9,   12,  15,  18,
+			21,  24,  27,  30,  33,  36,  39,  42,
+			45,  48,  51,  54,  57,  60,  63,  66,
+			69,  72,  75,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,
+		},
+		{	/* Fourth byte table 30. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  68,  72,  76,  80,  84,  88,  92,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 31. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,
+		},
+		{	/* Fourth byte table 32. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 33. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 34. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 35. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 36. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 37. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+		{	/* Fourth byte table 38. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,
+		},
+	},
+	{
+		{	/* Fourth byte table 0. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,
+		},
+		{	/* Fourth byte table 1. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			46,  48,  50,  52,  54,  56,  58,  60,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,
+		},
+		{	/* Fourth byte table 2. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   2,   4,   4,   6,   6,
+			8,   8,   10,  10,  12,  12,  14,  14,
+			16,  16,  18,  18,  20,  20,  22,  22,
+			24,  24,  26,  26,  28,  28,  30,  30,
+			32,  32,  34,  34,  36,  36,  38,  38,
+			40,  40,  42,  42,  44,  44,  46,  46,
+			48,  48,  49,  49,  51,  51,  53,  53,
+			55,  55,  55,  57,  57,  59,  59,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,  61,  61,  61,  61,  61,  61,  61,
+			61,
+		},
+		{	/* Fourth byte table 3. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   4,   4,   6,   6,   8,
+			8,   10,  10,  10,  12,  12,  14,  14,
+			16,  16,  18,  18,  20,  20,  22,  22,
+			24,  24,  26,  26,  28,  28,  30,  30,
+			32,  32,  34,  34,  36,  36,  38,  38,
+			40,  40,  42,  42,  44,  44,  46,  46,
+			48,  48,  50,  50,  52,  52,  54,  54,
+			56,  56,  56,  58,  58,  60,  60,  62,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,  63,  63,  63,  63,  63,  63,  63,
+			63,
+		},
+		{	/* Fourth byte table 4. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   2,   4,   4,   6,   6,
+			6,   8,   8,   8,   8,   10,  10,  10,
+			10,  10,  10,  12,  12,  12,  14,  14,
+			14,  14,  16,  18,  18,  18,  18,  20,
+			20,  20,  22,  22,  24,  24,  26,  26,
+			26,  28,  28,  28,  28,  28,  30,  30,
+			30,  32,  32,  32,  32,  34,  34,  36,
+			36,  36,  38,  38,  38,  38,  40,  40,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,
+		},
+		{	/* Fourth byte table 5. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   2,   4,
+			4,   6,   8,   8,   10,  12,  12,  14,
+			14,  16,  16,  18,  18,  20,  20,  22,
+			22,  24,  24,  26,  26,  28,  30,  30,
+			32,  32,  34,  34,  36,  36,  38,  38,
+			40,  40,  42,  42,  44,  44,  46,  46,
+			48,  48,  48,  50,  52,  52,  54,  54,
+			54,  54,  56,  56,  58,  58,  60,  60,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,
+		},
+		{	/* Fourth byte table 6. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   2,   4,   4,   6,   6,
+			8,   8,   10,  10,  12,  12,  14,  14,
+			16,  16,  18,  18,  20,  20,  22,  22,
+			24,  24,  26,  26,  28,  28,  30,  30,
+			32,  32,  32,  32,  34,  34,  36,  36,
+			38,  38,  40,  40,  42,  42,  44,  44,
+			46,  46,  48,  48,  50,  50,  50,  50,
+			50,  50,  50,  50,  50,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,  52,  52,  52,  52,  52,  52,  52,
+			52,
+		},
+		{	/* Fourth byte table 7. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   2,   2,   2,   2,   2,
+			4,   4,   6,   6,   8,   8,   10,  10,
+			12,  12,  12,  12,  14,  16,  16,  18,
+			20,  20,  22,  22,  24,  24,  24,  24,
+			24,  26,  26,  26,  28,  28,  28,  28,
+			28,  30,  32,  32,  35,  35,  35,  35,
+			37,  37,  37,  39,  39,  39,  41,  41,
+			41,  41,  41,  41,  41,  41,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,  44,  44,  44,  44,  44,  44,  44,
+			44,
+		},
+		{	/* Fourth byte table 8. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   2,   2,   4,   4,   4,   4,
+			4,   6,   8,   10,  12,  14,  14,  14,
+			14,  14,  14,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,  16,  16,  16,  16,  16,  16,  16,
+			16,
+		},
+		{	/* Fourth byte table 9. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   4,   6,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,   8,   8,   8,   8,   8,   8,   8,
+			8,
+		},
+		{	/* Fourth byte table 10. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   2,   4,   6,
+			8,   8,   10,  12,  14,  16,  18,  20,
+			22,  24,  26,  28,  30,  32,  34,  36,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,  38,  38,  38,  38,  38,  38,  38,
+			38,
+		},
+		{	/* Fourth byte table 11. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			30,  32,  34,  34,  34,  34,  36,  38,
+			38,  38,  40,  40,  42,  42,  44,  44,
+			46,  46,  48,  48,  50,  50,  52,  52,
+			54,  54,  56,  56,  58,  58,  60,  60,
+			62,  64,  66,  68,  68,  68,  70,  70,
+			70,  72,  72,  72,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,  74,  74,  74,  74,  74,  74,  74,
+			74,
+		},
+		{	/* Fourth byte table 12. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,  32,  32,  32,  32,  32,  32,  32,
+			32,
+		},
+		{	/* Fourth byte table 13. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			16,  18,  20,  22,  24,  26,  28,  30,
+			32,  34,  36,  38,  40,  42,  44,  46,
+			48,  50,  52,  54,  56,  58,  60,  62,
+			64,  64,  66,  66,  68,  68,  70,  70,
+			72,  72,  74,  74,  76,  76,  78,  78,
+			80,  80,  82,  82,  84,  84,  86,  86,
+			88,  88,  90,  90,  92,  92,  94,  94,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 14. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   2,   2,   2,   2,   2,
+			2,   2,   2,   2,   4,   4,   6,   6,
+			8,   8,   10,  10,  12,  12,  14,  14,
+			16,  16,  18,  18,  20,  20,  22,  22,
+			24,  24,  26,  26,  28,  28,  30,  30,
+			32,  32,  34,  34,  36,  36,  38,  38,
+			40,  40,  42,  42,  44,  44,  46,  46,
+			48,  48,  50,  50,  52,  52,  54,  54,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,  56,  56,  56,  56,  56,  56,  56,
+			56,
+		},
+		{	/* Fourth byte table 15. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   2,   2,   4,   4,   6,
+			6,   8,   8,   10,  10,  12,  12,  14,
+			16,  16,  18,  18,  20,  20,  22,  22,
+			24,  24,  26,  26,  28,  28,  30,  30,
+			32,  32,  34,  34,  36,  36,  38,  38,
+			40,  40,  42,  42,  44,  44,  46,  46,
+			48,  48,  50,  50,  52,  52,  54,  54,
+			56,  56,  58,  58,  60,  60,  62,  62,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+		{	/* Fourth byte table 16. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   2,   4,   4,   6,   6,
+			8,   8,   10,  10,  12,  12,  14,  14,
+			16,  16,  18,  18,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,  20,  20,  20,  20,  20,  20,  20,
+			20,
+		},
+		{	/* Fourth byte table 17. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   2,   4,   6,   8,   10,  12,
+			14,  16,  18,  20,  22,  24,  26,  28,
+			30,  32,  34,  36,  38,  40,  42,  44,
+			46,  48,  50,  52,  54,  56,  58,  60,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,  62,  62,  62,  62,  62,  62,  62,
+			62,
+		},
+		{	/* Fourth byte table 18. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   2,   4,   6,   8,   10,  12,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,  14,  14,  14,  14,  14,  14,  14,
+			14,
+		},
+		{	/* Fourth byte table 19. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,
+		},
+		{	/* Fourth byte table 20. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   3,   6,   6,   9,   9,
+			12,  12,  15,  15,  18,  18,  21,  21,
+			24,  24,  27,  27,  30,  30,  33,  33,
+			36,  36,  39,  39,  42,  42,  45,  45,
+			48,  48,  51,  51,  54,  54,  57,  57,
+			60,  60,  63,  63,  66,  66,  69,  69,
+			72,  72,  75,  75,  78,  78,  81,  81,
+			84,  84,  87,  87,  90,  90,  93,  93,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 21. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   3,   6,   6,   9,   9,
+			12,  12,  15,  15,  18,  18,  21,  21,
+			24,  24,  27,  27,  30,  30,  33,  33,
+			36,  36,  39,  39,  42,  42,  45,  45,
+			48,  48,  51,  51,  54,  54,  57,  57,
+			60,  60,  63,  63,  66,  66,  69,  69,
+			72,  72,  75,  75,  78,  78,  81,  81,
+			84,  84,  87,  87,  90,  90,  93,  93,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 22. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   3,   6,   6,   9,   9,
+			12,  12,  15,  15,  18,  18,  21,  21,
+			24,  24,  27,  27,  30,  30,  33,  33,
+			33,  33,  33,  33,  36,  36,  36,  36,
+			36,  36,  39,  39,  42,  42,  45,  45,
+			48,  48,  51,  51,  54,  54,  57,  57,
+			60,  60,  63,  63,  66,  66,  69,  69,
+			72,  72,  75,  75,  78,  78,  81,  81,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,  84,  84,  84,  84,  84,  84,  84,
+			84,
+		},
+		{	/* Fourth byte table 23. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   3,   6,   6,   9,   9,
+			12,  12,  15,  15,  18,  18,  21,  21,
+			24,  24,  27,  27,  30,  30,  33,  33,
+			36,  36,  39,  39,  42,  42,  45,  45,
+			48,  48,  51,  51,  54,  54,  57,  57,
+			60,  60,  63,  63,  66,  66,  69,  69,
+			72,  72,  75,  75,  78,  78,  81,  81,
+			84,  84,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,  87,  87,  87,  87,  87,  87,  87,
+			87,
+		},
+		{	/* Fourth byte table 24. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  27,  30,  33,  36,  39,  42,  42,
+			42,  42,  42,  42,  42,  42,  42,  42,
+			42,  45,  48,  51,  54,  57,  60,  63,
+			66,  66,  66,  66,  66,  66,  66,  66,
+			66,  69,  72,  75,  78,  81,  84,  87,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,  90,  90,  90,  90,  90,  90,  90,
+			90,
+		},
+		{	/* Fourth byte table 25. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  21,  21,  24,  24,  27,  27,
+			30,  30,  30,  30,  30,  30,  30,  30,
+			30,  33,  36,  39,  42,  45,  48,  51,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  57,  60,  63,  66,  69,  72,  75,
+			78,  81,  84,  87,  90,  93,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 26. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  24,  24,  24,  24,  24,  24,  24,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  72,  72,  72,  72,  72,  72,  72,
+			72,  75,  78,  78,  81,  81,  81,  81,
+			81,  81,  81,  81,  81,  81,  81,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,  83,  83,  83,  83,  83,  83,  83,
+			83,
+		},
+		{	/* Fourth byte table 27. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   6,   9,   9,   9,   9,   9,   9,
+			9,   9,   9,   9,   9,   9,   9,   9,
+			9,   12,  15,  15,  15,  15,  18,  18,
+			18,  18,  18,  18,  18,  18,  18,  18,
+			18,  18,  18,  18,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,  21,  21,  21,  21,  21,  21,  21,
+			21,
+		},
+		{	/* Fourth byte table 28. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   6,   9,   12,  15,  18,  21,  24,
+			27,  30,  33,  36,  39,  42,  45,  48,
+			51,  51,  51,  51,  51,  51,  51,  51,
+			51,  51,  51,  51,  51,  51,  51,  51,
+			51,  51,  51,  51,  51,  51,  51,  51,
+			51,  51,  51,  51,  51,  51,  51,  51,
+			51,  51,  51,  51,  51,  51,  51,  51,
+			51,  51,  51,  51,  51,  51,  51,  51,
+			51,  51,  51,  51,  51,  51,  51,  51,
+			51,  51,  51,  51,  51,  51,  51,  51,
+			51,
+		},
+		{	/* Fourth byte table 29. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,   3,   3,   3,   3,   3,   3,   3,
+			3,
+		},
+		{	/* Fourth byte table 30. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,
+		},
+		{	/* Fourth byte table 31. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,  48,  48,  48,  48,  48,  48,  48,
+			48,
+		},
+		{	/* Fourth byte table 32. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			93,  93,  96,  96,  96,  96,  98,  100,
+			100, 103, 103, 106, 106, 109, 109, 109,
+			109, 109, 109, 109, 109, 109, 109, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112, 112, 112, 112, 112, 112, 112, 112,
+			112,
+		},
+		{	/* Fourth byte table 33. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   3,   6,   6,   9,   9,
+			12,  12,  15,  15,  18,  18,  21,  21,
+			24,  24,  27,  27,  30,  30,  33,  33,
+			36,  36,  39,  39,  42,  42,  45,  45,
+			48,  48,  51,  51,  54,  54,  57,  57,
+			60,  60,  63,  63,  66,  66,  69,  69,
+			72,  72,  75,  75,  78,  78,  81,  81,
+			84,  84,  87,  87,  90,  90,  93,  93,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 34. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   3,   6,   6,   9,   9,
+			12,  12,  15,  15,  18,  18,  21,  21,
+			24,  24,  27,  27,  30,  30,  33,  33,
+			36,  36,  39,  39,  42,  42,  45,  45,
+			48,  48,  51,  51,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,  54,  54,  54,  54,  54,  54,  54,
+			54,
+		},
+		{	/* Fourth byte table 35. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   3,   6,   9,   12,  15,  18,  21,
+			24,  27,  30,  33,  36,  39,  42,  45,
+			48,  51,  54,  57,  60,  63,  66,  69,
+			72,  75,  78,  81,  84,  87,  90,  93,
+			96,  99,  102, 105, 108, 111, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114, 114, 114, 114, 114, 114, 114, 114,
+			114,
+		},
+		{	/* Fourth byte table 36. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   3,   6,   9,   12,  15,  18,
+			21,  24,  27,  30,  33,  36,  39,  42,
+			45,  48,  51,  54,  57,  60,  63,  66,
+			69,  72,  75,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,  78,  78,  78,  78,  78,  78,  78,
+			78,
+		},
+		{	/* Fourth byte table 37. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  68,  72,  76,  80,  84,  88,  92,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,  96,  96,  96,  96,  96,  96,  96,
+			96,
+		},
+		{	/* Fourth byte table 38. */
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   0,   0,   0,   0,   0,   0,   0,
+			0,   4,   8,   12,  16,  20,  24,  28,
+			32,  36,  40,  44,  48,  52,  56,  60,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,  64,  64,  64,  64,  64,  64,  64,
+			64,
+		},
+	},
+};
+
+static const uchar_t u8_toupper_final_tbl[2][2318] = {
+	{
+		0xCE, 0x9C, 0xC3, 0x80, 0xC3, 0x81, 0xC3, 0x82,
+		0xC3, 0x83, 0xC3, 0x84, 0xC3, 0x85, 0xC3, 0x86,
+		0xC3, 0x87, 0xC3, 0x88, 0xC3, 0x89, 0xC3, 0x8A,
+		0xC3, 0x8B, 0xC3, 0x8C, 0xC3, 0x8D, 0xC3, 0x8E,
+		0xC3, 0x8F, 0xC3, 0x90, 0xC3, 0x91, 0xC3, 0x92,
+		0xC3, 0x93, 0xC3, 0x94, 0xC3, 0x95, 0xC3, 0x96,
+		0xC3, 0x98, 0xC3, 0x99, 0xC3, 0x9A, 0xC3, 0x9B,
+		0xC3, 0x9C, 0xC3, 0x9D, 0xC3, 0x9E, 0xC5, 0xB8,
+		0xC4, 0x80, 0xC4, 0x82, 0xC4, 0x84, 0xC4, 0x86,
+		0xC4, 0x88, 0xC4, 0x8A, 0xC4, 0x8C, 0xC4, 0x8E,
+		0xC4, 0x90, 0xC4, 0x92, 0xC4, 0x94, 0xC4, 0x96,
+		0xC4, 0x98, 0xC4, 0x9A, 0xC4, 0x9C, 0xC4, 0x9E,
+		0xC4, 0xA0, 0xC4, 0xA2, 0xC4, 0xA4, 0xC4, 0xA6,
+		0xC4, 0xA8, 0xC4, 0xAA, 0xC4, 0xAC, 0xC4, 0xAE,
+		0x49, 0xC4, 0xB2, 0xC4, 0xB4, 0xC4, 0xB6, 0xC4,
+		0xB9, 0xC4, 0xBB, 0xC4, 0xBD, 0xC4, 0xBF, 0xC5,
+		0x81, 0xC5, 0x83, 0xC5, 0x85, 0xC5, 0x87, 0xC5,
+		0x8A, 0xC5, 0x8C, 0xC5, 0x8E, 0xC5, 0x90, 0xC5,
+		0x92, 0xC5, 0x94, 0xC5, 0x96, 0xC5, 0x98, 0xC5,
+		0x9A, 0xC5, 0x9C, 0xC5, 0x9E, 0xC5, 0xA0, 0xC5,
+		0xA2, 0xC5, 0xA4, 0xC5, 0xA6, 0xC5, 0xA8, 0xC5,
+		0xAA, 0xC5, 0xAC, 0xC5, 0xAE, 0xC5, 0xB0, 0xC5,
+		0xB2, 0xC5, 0xB4, 0xC5, 0xB6, 0xC5, 0xB9, 0xC5,
+		0xBB, 0xC5, 0xBD, 0x53, 0xC6, 0x82, 0xC6, 0x84,
+		0xC6, 0x87, 0xC6, 0x8B, 0xC6, 0x91, 0xC7, 0xB6,
+		0xC6, 0x98, 0xC8, 0xA0, 0xC6, 0xA0, 0xC6, 0xA2,
+		0xC6, 0xA4, 0xC6, 0xA7, 0xC6, 0xAC, 0xC6, 0xAF,
+		0xC6, 0xB3, 0xC6, 0xB5, 0xC6, 0xB8, 0xC6, 0xBC,
+		0xC7, 0xB7, 0xC7, 0x84, 0xC7, 0x84, 0xC7, 0x87,
+		0xC7, 0x87, 0xC7, 0x8A, 0xC7, 0x8A, 0xC7, 0x8D,
+		0xC7, 0x8F, 0xC7, 0x91, 0xC7, 0x93, 0xC7, 0x95,
+		0xC7, 0x97, 0xC7, 0x99, 0xC7, 0x9B, 0xC6, 0x8E,
+		0xC7, 0x9E, 0xC7, 0xA0, 0xC7, 0xA2, 0xC7, 0xA4,
+		0xC7, 0xA6, 0xC7, 0xA8, 0xC7, 0xAA, 0xC7, 0xAC,
+		0xC7, 0xAE, 0xC7, 0xB1, 0xC7, 0xB1, 0xC7, 0xB4,
+		0xC7, 0xB8, 0xC7, 0xBA, 0xC7, 0xBC, 0xC7, 0xBE,
+		0xC8, 0x80, 0xC8, 0x82, 0xC8, 0x84, 0xC8, 0x86,
+		0xC8, 0x88, 0xC8, 0x8A, 0xC8, 0x8C, 0xC8, 0x8E,
+		0xC8, 0x90, 0xC8, 0x92, 0xC8, 0x94, 0xC8, 0x96,
+		0xC8, 0x98, 0xC8, 0x9A, 0xC8, 0x9C, 0xC8, 0x9E,
+		0xC8, 0xA2, 0xC8, 0xA4, 0xC8, 0xA6, 0xC8, 0xA8,
+		0xC8, 0xAA, 0xC8, 0xAC, 0xC8, 0xAE, 0xC8, 0xB0,
+		0xC8, 0xB2, 0xC6, 0x81, 0xC6, 0x86, 0xC6, 0x89,
+		0xC6, 0x8A, 0xC6, 0x8F, 0xC6, 0x90, 0xC6, 0x93,
+		0xC6, 0x94, 0xC6, 0x97, 0xC6, 0x96, 0xC6, 0x9C,
+		0xC6, 0x9D, 0xC6, 0x9F, 0xC6, 0xA6, 0xC6, 0xA9,
+		0xC6, 0xAE, 0xC6, 0xB1, 0xC6, 0xB2, 0xC6, 0xB7,
+		0xCE, 0x99, 0xCE, 0x86, 0xCE, 0x88, 0xCE, 0x89,
+		0xCE, 0x8A, 0xCE, 0x91, 0xCE, 0x92, 0xCE, 0x93,
+		0xCE, 0x94, 0xCE, 0x95, 0xCE, 0x96, 0xCE, 0x97,
+		0xCE, 0x98, 0xCE, 0x99, 0xCE, 0x9A, 0xCE, 0x9B,
+		0xCE, 0x9C, 0xCE, 0x9D, 0xCE, 0x9E, 0xCE, 0x9F,
+		0xCE, 0xA0, 0xCE, 0xA1, 0xCE, 0xA3, 0xCE, 0xA3,
+		0xCE, 0xA4, 0xCE, 0xA5, 0xCE, 0xA6, 0xCE, 0xA7,
+		0xCE, 0xA8, 0xCE, 0xA9, 0xCE, 0xAA, 0xCE, 0xAB,
+		0xCE, 0x8C, 0xCE, 0x8E, 0xCE, 0x8F, 0xCE, 0x92,
+		0xCE, 0x98, 0xCE, 0xA6, 0xCE, 0xA0, 0xCF, 0x98,
+		0xCF, 0x9A, 0xCF, 0x9C, 0xCF, 0x9E, 0xCF, 0xA0,
+		0xCF, 0xA2, 0xCF, 0xA4, 0xCF, 0xA6, 0xCF, 0xA8,
+		0xCF, 0xAA, 0xCF, 0xAC, 0xCF, 0xAE, 0xCE, 0x9A,
+		0xCE, 0xA1, 0xCE, 0xA3, 0xCE, 0x95, 0xD0, 0x90,
+		0xD0, 0x91, 0xD0, 0x92, 0xD0, 0x93, 0xD0, 0x94,
+		0xD0, 0x95, 0xD0, 0x96, 0xD0, 0x97, 0xD0, 0x98,
+		0xD0, 0x99, 0xD0, 0x9A, 0xD0, 0x9B, 0xD0, 0x9C,
+		0xD0, 0x9D, 0xD0, 0x9E, 0xD0, 0x9F, 0xD0, 0xA0,
+		0xD0, 0xA1, 0xD0, 0xA2, 0xD0, 0xA3, 0xD0, 0xA4,
+		0xD0, 0xA5, 0xD0, 0xA6, 0xD0, 0xA7, 0xD0, 0xA8,
+		0xD0, 0xA9, 0xD0, 0xAA, 0xD0, 0xAB, 0xD0, 0xAC,
+		0xD0, 0xAD, 0xD0, 0xAE, 0xD0, 0xAF, 0xD0, 0x80,
+		0xD0, 0x81, 0xD0, 0x82, 0xD0, 0x83, 0xD0, 0x84,
+		0xD0, 0x85, 0xD0, 0x86, 0xD0, 0x87, 0xD0, 0x88,
+		0xD0, 0x89, 0xD0, 0x8A, 0xD0, 0x8B, 0xD0, 0x8C,
+		0xD0, 0x8D, 0xD0, 0x8E, 0xD0, 0x8F, 0xD1, 0xA0,
+		0xD1, 0xA2, 0xD1, 0xA4, 0xD1, 0xA6, 0xD1, 0xA8,
+		0xD1, 0xAA, 0xD1, 0xAC, 0xD1, 0xAE, 0xD1, 0xB0,
+		0xD1, 0xB2, 0xD1, 0xB4, 0xD1, 0xB6, 0xD1, 0xB8,
+		0xD1, 0xBA, 0xD1, 0xBC, 0xD1, 0xBE, 0xD2, 0x80,
+		0xD2, 0x8A, 0xD2, 0x8C, 0xD2, 0x8E, 0xD2, 0x90,
+		0xD2, 0x92, 0xD2, 0x94, 0xD2, 0x96, 0xD2, 0x98,
+		0xD2, 0x9A, 0xD2, 0x9C, 0xD2, 0x9E, 0xD2, 0xA0,
+		0xD2, 0xA2, 0xD2, 0xA4, 0xD2, 0xA6, 0xD2, 0xA8,
+		0xD2, 0xAA, 0xD2, 0xAC, 0xD2, 0xAE, 0xD2, 0xB0,
+		0xD2, 0xB2, 0xD2, 0xB4, 0xD2, 0xB6, 0xD2, 0xB8,
+		0xD2, 0xBA, 0xD2, 0xBC, 0xD2, 0xBE, 0xD3, 0x81,
+		0xD3, 0x83, 0xD3, 0x85, 0xD3, 0x87, 0xD3, 0x89,
+		0xD3, 0x8B, 0xD3, 0x8D, 0xD3, 0x90, 0xD3, 0x92,
+		0xD3, 0x94, 0xD3, 0x96, 0xD3, 0x98, 0xD3, 0x9A,
+		0xD3, 0x9C, 0xD3, 0x9E, 0xD3, 0xA0, 0xD3, 0xA2,
+		0xD3, 0xA4, 0xD3, 0xA6, 0xD3, 0xA8, 0xD3, 0xAA,
+		0xD3, 0xAC, 0xD3, 0xAE, 0xD3, 0xB0, 0xD3, 0xB2,
+		0xD3, 0xB4, 0xD3, 0xB8, 0xD4, 0x80, 0xD4, 0x82,
+		0xD4, 0x84, 0xD4, 0x86, 0xD4, 0x88, 0xD4, 0x8A,
+		0xD4, 0x8C, 0xD4, 0x8E, 0xD4, 0xB1, 0xD4, 0xB2,
+		0xD4, 0xB3, 0xD4, 0xB4, 0xD4, 0xB5, 0xD4, 0xB6,
+		0xD4, 0xB7, 0xD4, 0xB8, 0xD4, 0xB9, 0xD4, 0xBA,
+		0xD4, 0xBB, 0xD4, 0xBC, 0xD4, 0xBD, 0xD4, 0xBE,
+		0xD4, 0xBF, 0xD5, 0x80, 0xD5, 0x81, 0xD5, 0x82,
+		0xD5, 0x83, 0xD5, 0x84, 0xD5, 0x85, 0xD5, 0x86,
+		0xD5, 0x87, 0xD5, 0x88, 0xD5, 0x89, 0xD5, 0x8A,
+		0xD5, 0x8B, 0xD5, 0x8C, 0xD5, 0x8D, 0xD5, 0x8E,
+		0xD5, 0x8F, 0xD5, 0x90, 0xD5, 0x91, 0xD5, 0x92,
+		0xD5, 0x93, 0xD5, 0x94, 0xD5, 0x95, 0xD5, 0x96,
+		0xE1, 0xB8, 0x80, 0xE1, 0xB8, 0x82, 0xE1, 0xB8,
+		0x84, 0xE1, 0xB8, 0x86, 0xE1, 0xB8, 0x88, 0xE1,
+		0xB8, 0x8A, 0xE1, 0xB8, 0x8C, 0xE1, 0xB8, 0x8E,
+		0xE1, 0xB8, 0x90, 0xE1, 0xB8, 0x92, 0xE1, 0xB8,
+		0x94, 0xE1, 0xB8, 0x96, 0xE1, 0xB8, 0x98, 0xE1,
+		0xB8, 0x9A, 0xE1, 0xB8, 0x9C, 0xE1, 0xB8, 0x9E,
+		0xE1, 0xB8, 0xA0, 0xE1, 0xB8, 0xA2, 0xE1, 0xB8,
+		0xA4, 0xE1, 0xB8, 0xA6, 0xE1, 0xB8, 0xA8, 0xE1,
+		0xB8, 0xAA, 0xE1, 0xB8, 0xAC, 0xE1, 0xB8, 0xAE,
+		0xE1, 0xB8, 0xB0, 0xE1, 0xB8, 0xB2, 0xE1, 0xB8,
+		0xB4, 0xE1, 0xB8, 0xB6, 0xE1, 0xB8, 0xB8, 0xE1,
+		0xB8, 0xBA, 0xE1, 0xB8, 0xBC, 0xE1, 0xB8, 0xBE,
+		0xE1, 0xB9, 0x80, 0xE1, 0xB9, 0x82, 0xE1, 0xB9,
+		0x84, 0xE1, 0xB9, 0x86, 0xE1, 0xB9, 0x88, 0xE1,
+		0xB9, 0x8A, 0xE1, 0xB9, 0x8C, 0xE1, 0xB9, 0x8E,
+		0xE1, 0xB9, 0x90, 0xE1, 0xB9, 0x92, 0xE1, 0xB9,
+		0x94, 0xE1, 0xB9, 0x96, 0xE1, 0xB9, 0x98, 0xE1,
+		0xB9, 0x9A, 0xE1, 0xB9, 0x9C, 0xE1, 0xB9, 0x9E,
+		0xE1, 0xB9, 0xA0, 0xE1, 0xB9, 0xA2, 0xE1, 0xB9,
+		0xA4, 0xE1, 0xB9, 0xA6, 0xE1, 0xB9, 0xA8, 0xE1,
+		0xB9, 0xAA, 0xE1, 0xB9, 0xAC, 0xE1, 0xB9, 0xAE,
+		0xE1, 0xB9, 0xB0, 0xE1, 0xB9, 0xB2, 0xE1, 0xB9,
+		0xB4, 0xE1, 0xB9, 0xB6, 0xE1, 0xB9, 0xB8, 0xE1,
+		0xB9, 0xBA, 0xE1, 0xB9, 0xBC, 0xE1, 0xB9, 0xBE,
+		0xE1, 0xBA, 0x80, 0xE1, 0xBA, 0x82, 0xE1, 0xBA,
+		0x84, 0xE1, 0xBA, 0x86, 0xE1, 0xBA, 0x88, 0xE1,
+		0xBA, 0x8A, 0xE1, 0xBA, 0x8C, 0xE1, 0xBA, 0x8E,
+		0xE1, 0xBA, 0x90, 0xE1, 0xBA, 0x92, 0xE1, 0xBA,
+		0x94, 0xE1, 0xB9, 0xA0, 0xE1, 0xBA, 0xA0, 0xE1,
+		0xBA, 0xA2, 0xE1, 0xBA, 0xA4, 0xE1, 0xBA, 0xA6,
+		0xE1, 0xBA, 0xA8, 0xE1, 0xBA, 0xAA, 0xE1, 0xBA,
+		0xAC, 0xE1, 0xBA, 0xAE, 0xE1, 0xBA, 0xB0, 0xE1,
+		0xBA, 0xB2, 0xE1, 0xBA, 0xB4, 0xE1, 0xBA, 0xB6,
+		0xE1, 0xBA, 0xB8, 0xE1, 0xBA, 0xBA, 0xE1, 0xBA,
+		0xBC, 0xE1, 0xBA, 0xBE, 0xE1, 0xBB, 0x80, 0xE1,
+		0xBB, 0x82, 0xE1, 0xBB, 0x84, 0xE1, 0xBB, 0x86,
+		0xE1, 0xBB, 0x88, 0xE1, 0xBB, 0x8A, 0xE1, 0xBB,
+		0x8C, 0xE1, 0xBB, 0x8E, 0xE1, 0xBB, 0x90, 0xE1,
+		0xBB, 0x92, 0xE1, 0xBB, 0x94, 0xE1, 0xBB, 0x96,
+		0xE1, 0xBB, 0x98, 0xE1, 0xBB, 0x9A, 0xE1, 0xBB,
+		0x9C, 0xE1, 0xBB, 0x9E, 0xE1, 0xBB, 0xA0, 0xE1,
+		0xBB, 0xA2, 0xE1, 0xBB, 0xA4, 0xE1, 0xBB, 0xA6,
+		0xE1, 0xBB, 0xA8, 0xE1, 0xBB, 0xAA, 0xE1, 0xBB,
+		0xAC, 0xE1, 0xBB, 0xAE, 0xE1, 0xBB, 0xB0, 0xE1,
+		0xBB, 0xB2, 0xE1, 0xBB, 0xB4, 0xE1, 0xBB, 0xB6,
+		0xE1, 0xBB, 0xB8, 0xE1, 0xBC, 0x88, 0xE1, 0xBC,
+		0x89, 0xE1, 0xBC, 0x8A, 0xE1, 0xBC, 0x8B, 0xE1,
+		0xBC, 0x8C, 0xE1, 0xBC, 0x8D, 0xE1, 0xBC, 0x8E,
+		0xE1, 0xBC, 0x8F, 0xE1, 0xBC, 0x98, 0xE1, 0xBC,
+		0x99, 0xE1, 0xBC, 0x9A, 0xE1, 0xBC, 0x9B, 0xE1,
+		0xBC, 0x9C, 0xE1, 0xBC, 0x9D, 0xE1, 0xBC, 0xA8,
+		0xE1, 0xBC, 0xA9, 0xE1, 0xBC, 0xAA, 0xE1, 0xBC,
+		0xAB, 0xE1, 0xBC, 0xAC, 0xE1, 0xBC, 0xAD, 0xE1,
+		0xBC, 0xAE, 0xE1, 0xBC, 0xAF, 0xE1, 0xBC, 0xB8,
+		0xE1, 0xBC, 0xB9, 0xE1, 0xBC, 0xBA, 0xE1, 0xBC,
+		0xBB, 0xE1, 0xBC, 0xBC, 0xE1, 0xBC, 0xBD, 0xE1,
+		0xBC, 0xBE, 0xE1, 0xBC, 0xBF, 0xE1, 0xBD, 0x88,
+		0xE1, 0xBD, 0x89, 0xE1, 0xBD, 0x8A, 0xE1, 0xBD,
+		0x8B, 0xE1, 0xBD, 0x8C, 0xE1, 0xBD, 0x8D, 0xE1,
+		0xBD, 0x99, 0xE1, 0xBD, 0x9B, 0xE1, 0xBD, 0x9D,
+		0xE1, 0xBD, 0x9F, 0xE1, 0xBD, 0xA8, 0xE1, 0xBD,
+		0xA9, 0xE1, 0xBD, 0xAA, 0xE1, 0xBD, 0xAB, 0xE1,
+		0xBD, 0xAC, 0xE1, 0xBD, 0xAD, 0xE1, 0xBD, 0xAE,
+		0xE1, 0xBD, 0xAF, 0xE1, 0xBE, 0xBA, 0xE1, 0xBE,
+		0xBB, 0xE1, 0xBF, 0x88, 0xE1, 0xBF, 0x89, 0xE1,
+		0xBF, 0x8A, 0xE1, 0xBF, 0x8B, 0xE1, 0xBF, 0x9A,
+		0xE1, 0xBF, 0x9B, 0xE1, 0xBF, 0xB8, 0xE1, 0xBF,
+		0xB9, 0xE1, 0xBF, 0xAA, 0xE1, 0xBF, 0xAB, 0xE1,
+		0xBF, 0xBA, 0xE1, 0xBF, 0xBB, 0xE1, 0xBE, 0x88,
+		0xE1, 0xBE, 0x89, 0xE1, 0xBE, 0x8A, 0xE1, 0xBE,
+		0x8B, 0xE1, 0xBE, 0x8C, 0xE1, 0xBE, 0x8D, 0xE1,
+		0xBE, 0x8E, 0xE1, 0xBE, 0x8F, 0xE1, 0xBE, 0x98,
+		0xE1, 0xBE, 0x99, 0xE1, 0xBE, 0x9A, 0xE1, 0xBE,
+		0x9B, 0xE1, 0xBE, 0x9C, 0xE1, 0xBE, 0x9D, 0xE1,
+		0xBE, 0x9E, 0xE1, 0xBE, 0x9F, 0xE1, 0xBE, 0xA8,
+		0xE1, 0xBE, 0xA9, 0xE1, 0xBE, 0xAA, 0xE1, 0xBE,
+		0xAB, 0xE1, 0xBE, 0xAC, 0xE1, 0xBE, 0xAD, 0xE1,
+		0xBE, 0xAE, 0xE1, 0xBE, 0xAF, 0xE1, 0xBE, 0xB8,
+		0xE1, 0xBE, 0xB9, 0xE1, 0xBE, 0xBC, 0xCE, 0x99,
+		0xE1, 0xBF, 0x8C, 0xE1, 0xBF, 0x98, 0xE1, 0xBF,
+		0x99, 0xE1, 0xBF, 0xA8, 0xE1, 0xBF, 0xA9, 0xE1,
+		0xBF, 0xAC, 0xE1, 0xBF, 0xBC, 0xE2, 0x85, 0xA0,
+		0xE2, 0x85, 0xA1, 0xE2, 0x85, 0xA2, 0xE2, 0x85,
+		0xA3, 0xE2, 0x85, 0xA4, 0xE2, 0x85, 0xA5, 0xE2,
+		0x85, 0xA6, 0xE2, 0x85, 0xA7, 0xE2, 0x85, 0xA8,
+		0xE2, 0x85, 0xA9, 0xE2, 0x85, 0xAA, 0xE2, 0x85,
+		0xAB, 0xE2, 0x85, 0xAC, 0xE2, 0x85, 0xAD, 0xE2,
+		0x85, 0xAE, 0xE2, 0x85, 0xAF, 0xE2, 0x92, 0xB6,
+		0xE2, 0x92, 0xB7, 0xE2, 0x92, 0xB8, 0xE2, 0x92,
+		0xB9, 0xE2, 0x92, 0xBA, 0xE2, 0x92, 0xBB, 0xE2,
+		0x92, 0xBC, 0xE2, 0x92, 0xBD, 0xE2, 0x92, 0xBE,
+		0xE2, 0x92, 0xBF, 0xE2, 0x93, 0x80, 0xE2, 0x93,
+		0x81, 0xE2, 0x93, 0x82, 0xE2, 0x93, 0x83, 0xE2,
+		0x93, 0x84, 0xE2, 0x93, 0x85, 0xE2, 0x93, 0x86,
+		0xE2, 0x93, 0x87, 0xE2, 0x93, 0x88, 0xE2, 0x93,
+		0x89, 0xE2, 0x93, 0x8A, 0xE2, 0x93, 0x8B, 0xE2,
+		0x93, 0x8C, 0xE2, 0x93, 0x8D, 0xE2, 0x93, 0x8E,
+		0xE2, 0x93, 0x8F, 0xEF, 0xBC, 0xA1, 0xEF, 0xBC,
+		0xA2, 0xEF, 0xBC, 0xA3, 0xEF, 0xBC, 0xA4, 0xEF,
+		0xBC, 0xA5, 0xEF, 0xBC, 0xA6, 0xEF, 0xBC, 0xA7,
+		0xEF, 0xBC, 0xA8, 0xEF, 0xBC, 0xA9, 0xEF, 0xBC,
+		0xAA, 0xEF, 0xBC, 0xAB, 0xEF, 0xBC, 0xAC, 0xEF,
+		0xBC, 0xAD, 0xEF, 0xBC, 0xAE, 0xEF, 0xBC, 0xAF,
+		0xEF, 0xBC, 0xB0, 0xEF, 0xBC, 0xB1, 0xEF, 0xBC,
+		0xB2, 0xEF, 0xBC, 0xB3, 0xEF, 0xBC, 0xB4, 0xEF,
+		0xBC, 0xB5, 0xEF, 0xBC, 0xB6, 0xEF, 0xBC, 0xB7,
+		0xEF, 0xBC, 0xB8, 0xEF, 0xBC, 0xB9, 0xEF, 0xBC,
+		0xBA, 0xF0, 0x90, 0x90, 0x80, 0xF0, 0x90, 0x90,
+		0x81, 0xF0, 0x90, 0x90, 0x82, 0xF0, 0x90, 0x90,
+		0x83, 0xF0, 0x90, 0x90, 0x84, 0xF0, 0x90, 0x90,
+		0x85, 0xF0, 0x90, 0x90, 0x86, 0xF0, 0x90, 0x90,
+		0x87, 0xF0, 0x90, 0x90, 0x88, 0xF0, 0x90, 0x90,
+		0x89, 0xF0, 0x90, 0x90, 0x8A, 0xF0, 0x90, 0x90,
+		0x8B, 0xF0, 0x90, 0x90, 0x8C, 0xF0, 0x90, 0x90,
+		0x8D, 0xF0, 0x90, 0x90, 0x8E, 0xF0, 0x90, 0x90,
+		0x8F, 0xF0, 0x90, 0x90, 0x90, 0xF0, 0x90, 0x90,
+		0x91, 0xF0, 0x90, 0x90, 0x92, 0xF0, 0x90, 0x90,
+		0x93, 0xF0, 0x90, 0x90, 0x94, 0xF0, 0x90, 0x90,
+		0x95, 0xF0, 0x90, 0x90, 0x96, 0xF0, 0x90, 0x90,
+		0x97, 0xF0, 0x90, 0x90, 0x98, 0xF0, 0x90, 0x90,
+		0x99, 0xF0, 0x90, 0x90, 0x9A, 0xF0, 0x90, 0x90,
+		0x9B, 0xF0, 0x90, 0x90, 0x9C, 0xF0, 0x90, 0x90,
+		0x9D, 0xF0, 0x90, 0x90, 0x9E, 0xF0, 0x90, 0x90,
+		0x9F, 0xF0, 0x90, 0x90, 0xA0, 0xF0, 0x90, 0x90,
+		0xA1, 0xF0, 0x90, 0x90, 0xA2, 0xF0, 0x90, 0x90,
+		0xA3, 0xF0, 0x90, 0x90, 0xA4, 0xF0, 0x90, 0x90,
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+		0,    0,    0,    0,    0,    0,    0,    0,
+		0,    0,    0,    0,    0,    0,
+	},
+	{
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+		0xC3, 0x83, 0xC3, 0x84, 0xC3, 0x85, 0xC3, 0x86,
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+		0xC3, 0x8B, 0xC3, 0x8C, 0xC3, 0x8D, 0xC3, 0x8E,
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+		0xC3, 0x93, 0xC3, 0x94, 0xC3, 0x95, 0xC3, 0x96,
+		0xC3, 0x98, 0xC3, 0x99, 0xC3, 0x9A, 0xC3, 0x9B,
+		0xC3, 0x9C, 0xC3, 0x9D, 0xC3, 0x9E, 0xC5, 0xB8,
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+		0x92, 0xC5, 0x94, 0xC5, 0x96, 0xC5, 0x98, 0xC5,
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+		0xA2, 0xC5, 0xA4, 0xC5, 0xA6, 0xC5, 0xA8, 0xC5,
+		0xAA, 0xC5, 0xAC, 0xC5, 0xAE, 0xC5, 0xB0, 0xC5,
+		0xB2, 0xC5, 0xB4, 0xC5, 0xB6, 0xC5, 0xB9, 0xC5,
+		0xBB, 0xC5, 0xBD, 0x53, 0xC9, 0x83, 0xC6, 0x82,
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+		0xC7, 0xB6, 0xC6, 0x98, 0xC8, 0xBD, 0xC8, 0xA0,
+		0xC6, 0xA0, 0xC6, 0xA2, 0xC6, 0xA4, 0xC6, 0xA7,
+		0xC6, 0xAC, 0xC6, 0xAF, 0xC6, 0xB3, 0xC6, 0xB5,
+		0xC6, 0xB8, 0xC6, 0xBC, 0xC7, 0xB7, 0xC7, 0x84,
+		0xC7, 0x84, 0xC7, 0x87, 0xC7, 0x87, 0xC7, 0x8A,
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+		0xC7, 0x93, 0xC7, 0x95, 0xC7, 0x97, 0xC7, 0x99,
+		0xC7, 0x9B, 0xC6, 0x8E, 0xC7, 0x9E, 0xC7, 0xA0,
+		0xC7, 0xA2, 0xC7, 0xA4, 0xC7, 0xA6, 0xC7, 0xA8,
+		0xC7, 0xAA, 0xC7, 0xAC, 0xC7, 0xAE, 0xC7, 0xB1,
+		0xC7, 0xB1, 0xC7, 0xB4, 0xC7, 0xB8, 0xC7, 0xBA,
+		0xC7, 0xBC, 0xC7, 0xBE, 0xC8, 0x80, 0xC8, 0x82,
+		0xC8, 0x84, 0xC8, 0x86, 0xC8, 0x88, 0xC8, 0x8A,
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+		0xC8, 0xA6, 0xC8, 0xA8, 0xC8, 0xAA, 0xC8, 0xAC,
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+		0xC6, 0x93, 0xC6, 0x94, 0xC6, 0x97, 0xC6, 0x96,
+		0xE2, 0xB1, 0xA2, 0xC6, 0x9C, 0xC6, 0x9D, 0xC6,
+		0x9F, 0xE2, 0xB1, 0xA4, 0xC6, 0xA6, 0xC6, 0xA9,
+		0xC6, 0xAE, 0xC9, 0x84, 0xC6, 0xB1, 0xC6, 0xB2,
+		0xC9, 0x85, 0xC6, 0xB7, 0xCE, 0x99, 0xCF, 0xBD,
+		0xCF, 0xBE, 0xCF, 0xBF, 0xCE, 0x86, 0xCE, 0x88,
+		0xCE, 0x89, 0xCE, 0x8A, 0xCE, 0x91, 0xCE, 0x92,
+		0xCE, 0x93, 0xCE, 0x94, 0xCE, 0x95, 0xCE, 0x96,
+		0xCE, 0x97, 0xCE, 0x98, 0xCE, 0x99, 0xCE, 0x9A,
+		0xCE, 0x9B, 0xCE, 0x9C, 0xCE, 0x9D, 0xCE, 0x9E,
+		0xCE, 0x9F, 0xCE, 0xA0, 0xCE, 0xA1, 0xCE, 0xA3,
+		0xCE, 0xA3, 0xCE, 0xA4, 0xCE, 0xA5, 0xCE, 0xA6,
+		0xCE, 0xA7, 0xCE, 0xA8, 0xCE, 0xA9, 0xCE, 0xAA,
+		0xCE, 0xAB, 0xCE, 0x8C, 0xCE, 0x8E, 0xCE, 0x8F,
+		0xCE, 0x92, 0xCE, 0x98, 0xCE, 0xA6, 0xCE, 0xA0,
+		0xCF, 0x98, 0xCF, 0x9A, 0xCF, 0x9C, 0xCF, 0x9E,
+		0xCF, 0xA0, 0xCF, 0xA2, 0xCF, 0xA4, 0xCF, 0xA6,
+		0xCF, 0xA8, 0xCF, 0xAA, 0xCF, 0xAC, 0xCF, 0xAE,
+		0xCE, 0x9A, 0xCE, 0xA1, 0xCF, 0xB9, 0xCE, 0x95,
+		0xCF, 0xB7, 0xCF, 0xBA, 0xD0, 0x90, 0xD0, 0x91,
+		0xD0, 0x92, 0xD0, 0x93, 0xD0, 0x94, 0xD0, 0x95,
+		0xD0, 0x96, 0xD0, 0x97, 0xD0, 0x98, 0xD0, 0x99,
+		0xD0, 0x9A, 0xD0, 0x9B, 0xD0, 0x9C, 0xD0, 0x9D,
+		0xD0, 0x9E, 0xD0, 0x9F, 0xD0, 0xA0, 0xD0, 0xA1,
+		0xD0, 0xA2, 0xD0, 0xA3, 0xD0, 0xA4, 0xD0, 0xA5,
+		0xD0, 0xA6, 0xD0, 0xA7, 0xD0, 0xA8, 0xD0, 0xA9,
+		0xD0, 0xAA, 0xD0, 0xAB, 0xD0, 0xAC, 0xD0, 0xAD,
+		0xD0, 0xAE, 0xD0, 0xAF, 0xD0, 0x80, 0xD0, 0x81,
+		0xD0, 0x82, 0xD0, 0x83, 0xD0, 0x84, 0xD0, 0x85,
+		0xD0, 0x86, 0xD0, 0x87, 0xD0, 0x88, 0xD0, 0x89,
+		0xD0, 0x8A, 0xD0, 0x8B, 0xD0, 0x8C, 0xD0, 0x8D,
+		0xD0, 0x8E, 0xD0, 0x8F, 0xD1, 0xA0, 0xD1, 0xA2,
+		0xD1, 0xA4, 0xD1, 0xA6, 0xD1, 0xA8, 0xD1, 0xAA,
+		0xD1, 0xAC, 0xD1, 0xAE, 0xD1, 0xB0, 0xD1, 0xB2,
+		0xD1, 0xB4, 0xD1, 0xB6, 0xD1, 0xB8, 0xD1, 0xBA,
+		0xD1, 0xBC, 0xD1, 0xBE, 0xD2, 0x80, 0xD2, 0x8A,
+		0xD2, 0x8C, 0xD2, 0x8E, 0xD2, 0x90, 0xD2, 0x92,
+		0xD2, 0x94, 0xD2, 0x96, 0xD2, 0x98, 0xD2, 0x9A,
+		0xD2, 0x9C, 0xD2, 0x9E, 0xD2, 0xA0, 0xD2, 0xA2,
+		0xD2, 0xA4, 0xD2, 0xA6, 0xD2, 0xA8, 0xD2, 0xAA,
+		0xD2, 0xAC, 0xD2, 0xAE, 0xD2, 0xB0, 0xD2, 0xB2,
+		0xD2, 0xB4, 0xD2, 0xB6, 0xD2, 0xB8, 0xD2, 0xBA,
+		0xD2, 0xBC, 0xD2, 0xBE, 0xD3, 0x81, 0xD3, 0x83,
+		0xD3, 0x85, 0xD3, 0x87, 0xD3, 0x89, 0xD3, 0x8B,
+		0xD3, 0x8D, 0xD3, 0x80, 0xD3, 0x90, 0xD3, 0x92,
+		0xD3, 0x94, 0xD3, 0x96, 0xD3, 0x98, 0xD3, 0x9A,
+		0xD3, 0x9C, 0xD3, 0x9E, 0xD3, 0xA0, 0xD3, 0xA2,
+		0xD3, 0xA4, 0xD3, 0xA6, 0xD3, 0xA8, 0xD3, 0xAA,
+		0xD3, 0xAC, 0xD3, 0xAE, 0xD3, 0xB0, 0xD3, 0xB2,
+		0xD3, 0xB4, 0xD3, 0xB6, 0xD3, 0xB8, 0xD3, 0xBA,
+		0xD3, 0xBC, 0xD3, 0xBE, 0xD4, 0x80, 0xD4, 0x82,
+		0xD4, 0x84, 0xD4, 0x86, 0xD4, 0x88, 0xD4, 0x8A,
+		0xD4, 0x8C, 0xD4, 0x8E, 0xD4, 0x90, 0xD4, 0x92,
+		0xD4, 0xB1, 0xD4, 0xB2, 0xD4, 0xB3, 0xD4, 0xB4,
+		0xD4, 0xB5, 0xD4, 0xB6, 0xD4, 0xB7, 0xD4, 0xB8,
+		0xD4, 0xB9, 0xD4, 0xBA, 0xD4, 0xBB, 0xD4, 0xBC,
+		0xD4, 0xBD, 0xD4, 0xBE, 0xD4, 0xBF, 0xD5, 0x80,
+		0xD5, 0x81, 0xD5, 0x82, 0xD5, 0x83, 0xD5, 0x84,
+		0xD5, 0x85, 0xD5, 0x86, 0xD5, 0x87, 0xD5, 0x88,
+		0xD5, 0x89, 0xD5, 0x8A, 0xD5, 0x8B, 0xD5, 0x8C,
+		0xD5, 0x8D, 0xD5, 0x8E, 0xD5, 0x8F, 0xD5, 0x90,
+		0xD5, 0x91, 0xD5, 0x92, 0xD5, 0x93, 0xD5, 0x94,
+		0xD5, 0x95, 0xD5, 0x96, 0xE2, 0xB1, 0xA3, 0xE1,
+		0xB8, 0x80, 0xE1, 0xB8, 0x82, 0xE1, 0xB8, 0x84,
+		0xE1, 0xB8, 0x86, 0xE1, 0xB8, 0x88, 0xE1, 0xB8,
+		0x8A, 0xE1, 0xB8, 0x8C, 0xE1, 0xB8, 0x8E, 0xE1,
+		0xB8, 0x90, 0xE1, 0xB8, 0x92, 0xE1, 0xB8, 0x94,
+		0xE1, 0xB8, 0x96, 0xE1, 0xB8, 0x98, 0xE1, 0xB8,
+		0x9A, 0xE1, 0xB8, 0x9C, 0xE1, 0xB8, 0x9E, 0xE1,
+		0xB8, 0xA0, 0xE1, 0xB8, 0xA2, 0xE1, 0xB8, 0xA4,
+		0xE1, 0xB8, 0xA6, 0xE1, 0xB8, 0xA8, 0xE1, 0xB8,
+		0xAA, 0xE1, 0xB8, 0xAC, 0xE1, 0xB8, 0xAE, 0xE1,
+		0xB8, 0xB0, 0xE1, 0xB8, 0xB2, 0xE1, 0xB8, 0xB4,
+		0xE1, 0xB8, 0xB6, 0xE1, 0xB8, 0xB8, 0xE1, 0xB8,
+		0xBA, 0xE1, 0xB8, 0xBC, 0xE1, 0xB8, 0xBE, 0xE1,
+		0xB9, 0x80, 0xE1, 0xB9, 0x82, 0xE1, 0xB9, 0x84,
+		0xE1, 0xB9, 0x86, 0xE1, 0xB9, 0x88, 0xE1, 0xB9,
+		0x8A, 0xE1, 0xB9, 0x8C, 0xE1, 0xB9, 0x8E, 0xE1,
+		0xB9, 0x90, 0xE1, 0xB9, 0x92, 0xE1, 0xB9, 0x94,
+		0xE1, 0xB9, 0x96, 0xE1, 0xB9, 0x98, 0xE1, 0xB9,
+		0x9A, 0xE1, 0xB9, 0x9C, 0xE1, 0xB9, 0x9E, 0xE1,
+		0xB9, 0xA0, 0xE1, 0xB9, 0xA2, 0xE1, 0xB9, 0xA4,
+		0xE1, 0xB9, 0xA6, 0xE1, 0xB9, 0xA8, 0xE1, 0xB9,
+		0xAA, 0xE1, 0xB9, 0xAC, 0xE1, 0xB9, 0xAE, 0xE1,
+		0xB9, 0xB0, 0xE1, 0xB9, 0xB2, 0xE1, 0xB9, 0xB4,
+		0xE1, 0xB9, 0xB6, 0xE1, 0xB9, 0xB8, 0xE1, 0xB9,
+		0xBA, 0xE1, 0xB9, 0xBC, 0xE1, 0xB9, 0xBE, 0xE1,
+		0xBA, 0x80, 0xE1, 0xBA, 0x82, 0xE1, 0xBA, 0x84,
+		0xE1, 0xBA, 0x86, 0xE1, 0xBA, 0x88, 0xE1, 0xBA,
+		0x8A, 0xE1, 0xBA, 0x8C, 0xE1, 0xBA, 0x8E, 0xE1,
+		0xBA, 0x90, 0xE1, 0xBA, 0x92, 0xE1, 0xBA, 0x94,
+		0xE1, 0xB9, 0xA0, 0xE1, 0xBA, 0xA0, 0xE1, 0xBA,
+		0xA2, 0xE1, 0xBA, 0xA4, 0xE1, 0xBA, 0xA6, 0xE1,
+		0xBA, 0xA8, 0xE1, 0xBA, 0xAA, 0xE1, 0xBA, 0xAC,
+		0xE1, 0xBA, 0xAE, 0xE1, 0xBA, 0xB0, 0xE1, 0xBA,
+		0xB2, 0xE1, 0xBA, 0xB4, 0xE1, 0xBA, 0xB6, 0xE1,
+		0xBA, 0xB8, 0xE1, 0xBA, 0xBA, 0xE1, 0xBA, 0xBC,
+		0xE1, 0xBA, 0xBE, 0xE1, 0xBB, 0x80, 0xE1, 0xBB,
+		0x82, 0xE1, 0xBB, 0x84, 0xE1, 0xBB, 0x86, 0xE1,
+		0xBB, 0x88, 0xE1, 0xBB, 0x8A, 0xE1, 0xBB, 0x8C,
+		0xE1, 0xBB, 0x8E, 0xE1, 0xBB, 0x90, 0xE1, 0xBB,
+		0x92, 0xE1, 0xBB, 0x94, 0xE1, 0xBB, 0x96, 0xE1,
+		0xBB, 0x98, 0xE1, 0xBB, 0x9A, 0xE1, 0xBB, 0x9C,
+		0xE1, 0xBB, 0x9E, 0xE1, 0xBB, 0xA0, 0xE1, 0xBB,
+		0xA2, 0xE1, 0xBB, 0xA4, 0xE1, 0xBB, 0xA6, 0xE1,
+		0xBB, 0xA8, 0xE1, 0xBB, 0xAA, 0xE1, 0xBB, 0xAC,
+		0xE1, 0xBB, 0xAE, 0xE1, 0xBB, 0xB0, 0xE1, 0xBB,
+		0xB2, 0xE1, 0xBB, 0xB4, 0xE1, 0xBB, 0xB6, 0xE1,
+		0xBB, 0xB8, 0xE1, 0xBC, 0x88, 0xE1, 0xBC, 0x89,
+		0xE1, 0xBC, 0x8A, 0xE1, 0xBC, 0x8B, 0xE1, 0xBC,
+		0x8C, 0xE1, 0xBC, 0x8D, 0xE1, 0xBC, 0x8E, 0xE1,
+		0xBC, 0x8F, 0xE1, 0xBC, 0x98, 0xE1, 0xBC, 0x99,
+		0xE1, 0xBC, 0x9A, 0xE1, 0xBC, 0x9B, 0xE1, 0xBC,
+		0x9C, 0xE1, 0xBC, 0x9D, 0xE1, 0xBC, 0xA8, 0xE1,
+		0xBC, 0xA9, 0xE1, 0xBC, 0xAA, 0xE1, 0xBC, 0xAB,
+		0xE1, 0xBC, 0xAC, 0xE1, 0xBC, 0xAD, 0xE1, 0xBC,
+		0xAE, 0xE1, 0xBC, 0xAF, 0xE1, 0xBC, 0xB8, 0xE1,
+		0xBC, 0xB9, 0xE1, 0xBC, 0xBA, 0xE1, 0xBC, 0xBB,
+		0xE1, 0xBC, 0xBC, 0xE1, 0xBC, 0xBD, 0xE1, 0xBC,
+		0xBE, 0xE1, 0xBC, 0xBF, 0xE1, 0xBD, 0x88, 0xE1,
+		0xBD, 0x89, 0xE1, 0xBD, 0x8A, 0xE1, 0xBD, 0x8B,
+		0xE1, 0xBD, 0x8C, 0xE1, 0xBD, 0x8D, 0xE1, 0xBD,
+		0x99, 0xE1, 0xBD, 0x9B, 0xE1, 0xBD, 0x9D, 0xE1,
+		0xBD, 0x9F, 0xE1, 0xBD, 0xA8, 0xE1, 0xBD, 0xA9,
+		0xE1, 0xBD, 0xAA, 0xE1, 0xBD, 0xAB, 0xE1, 0xBD,
+		0xAC, 0xE1, 0xBD, 0xAD, 0xE1, 0xBD, 0xAE, 0xE1,
+		0xBD, 0xAF, 0xE1, 0xBE, 0xBA, 0xE1, 0xBE, 0xBB,
+		0xE1, 0xBF, 0x88, 0xE1, 0xBF, 0x89, 0xE1, 0xBF,
+		0x8A, 0xE1, 0xBF, 0x8B, 0xE1, 0xBF, 0x9A, 0xE1,
+		0xBF, 0x9B, 0xE1, 0xBF, 0xB8, 0xE1, 0xBF, 0xB9,
+		0xE1, 0xBF, 0xAA, 0xE1, 0xBF, 0xAB, 0xE1, 0xBF,
+		0xBA, 0xE1, 0xBF, 0xBB, 0xE1, 0xBE, 0x88, 0xE1,
+		0xBE, 0x89, 0xE1, 0xBE, 0x8A, 0xE1, 0xBE, 0x8B,
+		0xE1, 0xBE, 0x8C, 0xE1, 0xBE, 0x8D, 0xE1, 0xBE,
+		0x8E, 0xE1, 0xBE, 0x8F, 0xE1, 0xBE, 0x98, 0xE1,
+		0xBE, 0x99, 0xE1, 0xBE, 0x9A, 0xE1, 0xBE, 0x9B,
+		0xE1, 0xBE, 0x9C, 0xE1, 0xBE, 0x9D, 0xE1, 0xBE,
+		0x9E, 0xE1, 0xBE, 0x9F, 0xE1, 0xBE, 0xA8, 0xE1,
+		0xBE, 0xA9, 0xE1, 0xBE, 0xAA, 0xE1, 0xBE, 0xAB,
+		0xE1, 0xBE, 0xAC, 0xE1, 0xBE, 0xAD, 0xE1, 0xBE,
+		0xAE, 0xE1, 0xBE, 0xAF, 0xE1, 0xBE, 0xB8, 0xE1,
+		0xBE, 0xB9, 0xE1, 0xBE, 0xBC, 0xCE, 0x99, 0xE1,
+		0xBF, 0x8C, 0xE1, 0xBF, 0x98, 0xE1, 0xBF, 0x99,
+		0xE1, 0xBF, 0xA8, 0xE1, 0xBF, 0xA9, 0xE1, 0xBF,
+		0xAC, 0xE1, 0xBF, 0xBC, 0xE2, 0x84, 0xB2, 0xE2,
+		0x85, 0xA0, 0xE2, 0x85, 0xA1, 0xE2, 0x85, 0xA2,
+		0xE2, 0x85, 0xA3, 0xE2, 0x85, 0xA4, 0xE2, 0x85,
+		0xA5, 0xE2, 0x85, 0xA6, 0xE2, 0x85, 0xA7, 0xE2,
+		0x85, 0xA8, 0xE2, 0x85, 0xA9, 0xE2, 0x85, 0xAA,
+		0xE2, 0x85, 0xAB, 0xE2, 0x85, 0xAC, 0xE2, 0x85,
+		0xAD, 0xE2, 0x85, 0xAE, 0xE2, 0x85, 0xAF, 0xE2,
+		0x86, 0x83, 0xE2, 0x92, 0xB6, 0xE2, 0x92, 0xB7,
+		0xE2, 0x92, 0xB8, 0xE2, 0x92, 0xB9, 0xE2, 0x92,
+		0xBA, 0xE2, 0x92, 0xBB, 0xE2, 0x92, 0xBC, 0xE2,
+		0x92, 0xBD, 0xE2, 0x92, 0xBE, 0xE2, 0x92, 0xBF,
+		0xE2, 0x93, 0x80, 0xE2, 0x93, 0x81, 0xE2, 0x93,
+		0x82, 0xE2, 0x93, 0x83, 0xE2, 0x93, 0x84, 0xE2,
+		0x93, 0x85, 0xE2, 0x93, 0x86, 0xE2, 0x93, 0x87,
+		0xE2, 0x93, 0x88, 0xE2, 0x93, 0x89, 0xE2, 0x93,
+		0x8A, 0xE2, 0x93, 0x8B, 0xE2, 0x93, 0x8C, 0xE2,
+		0x93, 0x8D, 0xE2, 0x93, 0x8E, 0xE2, 0x93, 0x8F,
+		0xE2, 0xB0, 0x80, 0xE2, 0xB0, 0x81, 0xE2, 0xB0,
+		0x82, 0xE2, 0xB0, 0x83, 0xE2, 0xB0, 0x84, 0xE2,
+		0xB0, 0x85, 0xE2, 0xB0, 0x86, 0xE2, 0xB0, 0x87,
+		0xE2, 0xB0, 0x88, 0xE2, 0xB0, 0x89, 0xE2, 0xB0,
+		0x8A, 0xE2, 0xB0, 0x8B, 0xE2, 0xB0, 0x8C, 0xE2,
+		0xB0, 0x8D, 0xE2, 0xB0, 0x8E, 0xE2, 0xB0, 0x8F,
+		0xE2, 0xB0, 0x90, 0xE2, 0xB0, 0x91, 0xE2, 0xB0,
+		0x92, 0xE2, 0xB0, 0x93, 0xE2, 0xB0, 0x94, 0xE2,
+		0xB0, 0x95, 0xE2, 0xB0, 0x96, 0xE2, 0xB0, 0x97,
+		0xE2, 0xB0, 0x98, 0xE2, 0xB0, 0x99, 0xE2, 0xB0,
+		0x9A, 0xE2, 0xB0, 0x9B, 0xE2, 0xB0, 0x9C, 0xE2,
+		0xB0, 0x9D, 0xE2, 0xB0, 0x9E, 0xE2, 0xB0, 0x9F,
+		0xE2, 0xB0, 0xA0, 0xE2, 0xB0, 0xA1, 0xE2, 0xB0,
+		0xA2, 0xE2, 0xB0, 0xA3, 0xE2, 0xB0, 0xA4, 0xE2,
+		0xB0, 0xA5, 0xE2, 0xB0, 0xA6, 0xE2, 0xB0, 0xA7,
+		0xE2, 0xB0, 0xA8, 0xE2, 0xB0, 0xA9, 0xE2, 0xB0,
+		0xAA, 0xE2, 0xB0, 0xAB, 0xE2, 0xB0, 0xAC, 0xE2,
+		0xB0, 0xAD, 0xE2, 0xB0, 0xAE, 0xE2, 0xB1, 0xA0,
+		0xC8, 0xBA, 0xC8, 0xBE, 0xE2, 0xB1, 0xA7, 0xE2,
+		0xB1, 0xA9, 0xE2, 0xB1, 0xAB, 0xE2, 0xB1, 0xB5,
+		0xE2, 0xB2, 0x80, 0xE2, 0xB2, 0x82, 0xE2, 0xB2,
+		0x84, 0xE2, 0xB2, 0x86, 0xE2, 0xB2, 0x88, 0xE2,
+		0xB2, 0x8A, 0xE2, 0xB2, 0x8C, 0xE2, 0xB2, 0x8E,
+		0xE2, 0xB2, 0x90, 0xE2, 0xB2, 0x92, 0xE2, 0xB2,
+		0x94, 0xE2, 0xB2, 0x96, 0xE2, 0xB2, 0x98, 0xE2,
+		0xB2, 0x9A, 0xE2, 0xB2, 0x9C, 0xE2, 0xB2, 0x9E,
+		0xE2, 0xB2, 0xA0, 0xE2, 0xB2, 0xA2, 0xE2, 0xB2,
+		0xA4, 0xE2, 0xB2, 0xA6, 0xE2, 0xB2, 0xA8, 0xE2,
+		0xB2, 0xAA, 0xE2, 0xB2, 0xAC, 0xE2, 0xB2, 0xAE,
+		0xE2, 0xB2, 0xB0, 0xE2, 0xB2, 0xB2, 0xE2, 0xB2,
+		0xB4, 0xE2, 0xB2, 0xB6, 0xE2, 0xB2, 0xB8, 0xE2,
+		0xB2, 0xBA, 0xE2, 0xB2, 0xBC, 0xE2, 0xB2, 0xBE,
+		0xE2, 0xB3, 0x80, 0xE2, 0xB3, 0x82, 0xE2, 0xB3,
+		0x84, 0xE2, 0xB3, 0x86, 0xE2, 0xB3, 0x88, 0xE2,
+		0xB3, 0x8A, 0xE2, 0xB3, 0x8C, 0xE2, 0xB3, 0x8E,
+		0xE2, 0xB3, 0x90, 0xE2, 0xB3, 0x92, 0xE2, 0xB3,
+		0x94, 0xE2, 0xB3, 0x96, 0xE2, 0xB3, 0x98, 0xE2,
+		0xB3, 0x9A, 0xE2, 0xB3, 0x9C, 0xE2, 0xB3, 0x9E,
+		0xE2, 0xB3, 0xA0, 0xE2, 0xB3, 0xA2, 0xE1, 0x82,
+		0xA0, 0xE1, 0x82, 0xA1, 0xE1, 0x82, 0xA2, 0xE1,
+		0x82, 0xA3, 0xE1, 0x82, 0xA4, 0xE1, 0x82, 0xA5,
+		0xE1, 0x82, 0xA6, 0xE1, 0x82, 0xA7, 0xE1, 0x82,
+		0xA8, 0xE1, 0x82, 0xA9, 0xE1, 0x82, 0xAA, 0xE1,
+		0x82, 0xAB, 0xE1, 0x82, 0xAC, 0xE1, 0x82, 0xAD,
+		0xE1, 0x82, 0xAE, 0xE1, 0x82, 0xAF, 0xE1, 0x82,
+		0xB0, 0xE1, 0x82, 0xB1, 0xE1, 0x82, 0xB2, 0xE1,
+		0x82, 0xB3, 0xE1, 0x82, 0xB4, 0xE1, 0x82, 0xB5,
+		0xE1, 0x82, 0xB6, 0xE1, 0x82, 0xB7, 0xE1, 0x82,
+		0xB8, 0xE1, 0x82, 0xB9, 0xE1, 0x82, 0xBA, 0xE1,
+		0x82, 0xBB, 0xE1, 0x82, 0xBC, 0xE1, 0x82, 0xBD,
+		0xE1, 0x82, 0xBE, 0xE1, 0x82, 0xBF, 0xE1, 0x83,
+		0x80, 0xE1, 0x83, 0x81, 0xE1, 0x83, 0x82, 0xE1,
+		0x83, 0x83, 0xE1, 0x83, 0x84, 0xE1, 0x83, 0x85,
+		0xEF, 0xBC, 0xA1, 0xEF, 0xBC, 0xA2, 0xEF, 0xBC,
+		0xA3, 0xEF, 0xBC, 0xA4, 0xEF, 0xBC, 0xA5, 0xEF,
+		0xBC, 0xA6, 0xEF, 0xBC, 0xA7, 0xEF, 0xBC, 0xA8,
+		0xEF, 0xBC, 0xA9, 0xEF, 0xBC, 0xAA, 0xEF, 0xBC,
+		0xAB, 0xEF, 0xBC, 0xAC, 0xEF, 0xBC, 0xAD, 0xEF,
+		0xBC, 0xAE, 0xEF, 0xBC, 0xAF, 0xEF, 0xBC, 0xB0,
+		0xEF, 0xBC, 0xB1, 0xEF, 0xBC, 0xB2, 0xEF, 0xBC,
+		0xB3, 0xEF, 0xBC, 0xB4, 0xEF, 0xBC, 0xB5, 0xEF,
+		0xBC, 0xB6, 0xEF, 0xBC, 0xB7, 0xEF, 0xBC, 0xB8,
+		0xEF, 0xBC, 0xB9, 0xEF, 0xBC, 0xBA, 0xF0, 0x90,
+		0x90, 0x80, 0xF0, 0x90, 0x90, 0x81, 0xF0, 0x90,
+		0x90, 0x82, 0xF0, 0x90, 0x90, 0x83, 0xF0, 0x90,
+		0x90, 0x84, 0xF0, 0x90, 0x90, 0x85, 0xF0, 0x90,
+		0x90, 0x86, 0xF0, 0x90, 0x90, 0x87, 0xF0, 0x90,
+		0x90, 0x88, 0xF0, 0x90, 0x90, 0x89, 0xF0, 0x90,
+		0x90, 0x8A, 0xF0, 0x90, 0x90, 0x8B, 0xF0, 0x90,
+		0x90, 0x8C, 0xF0, 0x90, 0x90, 0x8D, 0xF0, 0x90,
+		0x90, 0x8E, 0xF0, 0x90, 0x90, 0x8F, 0xF0, 0x90,
+		0x90, 0x90, 0xF0, 0x90, 0x90, 0x91, 0xF0, 0x90,
+		0x90, 0x92, 0xF0, 0x90, 0x90, 0x93, 0xF0, 0x90,
+		0x90, 0x94, 0xF0, 0x90, 0x90, 0x95, 0xF0, 0x90,
+		0x90, 0x96, 0xF0, 0x90, 0x90, 0x97, 0xF0, 0x90,
+		0x90, 0x98, 0xF0, 0x90, 0x90, 0x99, 0xF0, 0x90,
+		0x90, 0x9A, 0xF0, 0x90, 0x90, 0x9B, 0xF0, 0x90,
+		0x90, 0x9C, 0xF0, 0x90, 0x90, 0x9D, 0xF0, 0x90,
+		0x90, 0x9E, 0xF0, 0x90, 0x90, 0x9F, 0xF0, 0x90,
+		0x90, 0xA0, 0xF0, 0x90, 0x90, 0xA1, 0xF0, 0x90,
+		0x90, 0xA2, 0xF0, 0x90, 0x90, 0xA3, 0xF0, 0x90,
+		0x90, 0xA4, 0xF0, 0x90, 0x90, 0xA5, 0xF0, 0x90,
+		0x90, 0xA6, 0xF0, 0x90, 0x90, 0xA7,
+	},
+};
+
+#undef	N_
+#undef	FIL_
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_U8_TEXTPREP_DATA_H */
diff --git a/uts/common/sys/vnode.h b/uts/common/sys/vnode.h
new file mode 100644
index 000000000000..d29152346e2c
--- /dev/null
+++ b/uts/common/sys/vnode.h
@@ -0,0 +1,1431 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+/*
+ * University Copyright- Copyright (c) 1982, 1986, 1988
+ * The Regents of the University of California
+ * All Rights Reserved
+ *
+ * University Acknowledgment- Portions of this document are derived from
+ * software developed by the University of California, Berkeley, and its
+ * contributors.
+ */
+
+#ifndef _SYS_VNODE_H
+#define	_SYS_VNODE_H
+
+#include <sys/types.h>
+#include <sys/t_lock.h>
+#include <sys/rwstlock.h>
+#include <sys/time_impl.h>
+#include <sys/cred.h>
+#include <sys/uio.h>
+#include <sys/resource.h>
+#include <vm/seg_enum.h>
+#include <sys/kstat.h>
+#include <sys/kmem.h>
+#include <sys/list.h>
+#ifdef	_KERNEL
+#include <sys/buf.h>
+#endif	/* _KERNEL */
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Statistics for all vnode operations.
+ * All operations record number of ops (since boot/mount/zero'ed).
+ * Certain I/O operations (read, write, readdir) also record number
+ * of bytes transferred.
+ * This appears in two places in the system: one is embedded in each
+ * vfs_t.  There is also an array of vopstats_t structures allocated
+ * on a per-fstype basis.
+ */
+
+#define	VOPSTATS_STR	"vopstats_"	/* Initial string for vopstat kstats */
+
+typedef struct vopstats {
+	kstat_named_t	nopen;		/* VOP_OPEN */
+	kstat_named_t	nclose;		/* VOP_CLOSE */
+	kstat_named_t	nread;		/* VOP_READ */
+	kstat_named_t	read_bytes;
+	kstat_named_t	nwrite;		/* VOP_WRITE */
+	kstat_named_t	write_bytes;
+	kstat_named_t	nioctl;		/* VOP_IOCTL */
+	kstat_named_t	nsetfl;		/* VOP_SETFL */
+	kstat_named_t	ngetattr;	/* VOP_GETATTR */
+	kstat_named_t	nsetattr;	/* VOP_SETATTR */
+	kstat_named_t	naccess;	/* VOP_ACCESS */
+	kstat_named_t	nlookup;	/* VOP_LOOKUP */
+	kstat_named_t	ncreate;	/* VOP_CREATE */
+	kstat_named_t	nremove;	/* VOP_REMOVE */
+	kstat_named_t	nlink;		/* VOP_LINK */
+	kstat_named_t	nrename;	/* VOP_RENAME */
+	kstat_named_t	nmkdir;		/* VOP_MKDIR */
+	kstat_named_t	nrmdir;		/* VOP_RMDIR */
+	kstat_named_t	nreaddir;	/* VOP_READDIR */
+	kstat_named_t	readdir_bytes;
+	kstat_named_t	nsymlink;	/* VOP_SYMLINK */
+	kstat_named_t	nreadlink;	/* VOP_READLINK */
+	kstat_named_t	nfsync;		/* VOP_FSYNC */
+	kstat_named_t	ninactive;	/* VOP_INACTIVE */
+	kstat_named_t	nfid;		/* VOP_FID */
+	kstat_named_t	nrwlock;	/* VOP_RWLOCK */
+	kstat_named_t	nrwunlock;	/* VOP_RWUNLOCK */
+	kstat_named_t	nseek;		/* VOP_SEEK */
+	kstat_named_t	ncmp;		/* VOP_CMP */
+	kstat_named_t	nfrlock;	/* VOP_FRLOCK */
+	kstat_named_t	nspace;		/* VOP_SPACE */
+	kstat_named_t	nrealvp;	/* VOP_REALVP */
+	kstat_named_t	ngetpage;	/* VOP_GETPAGE */
+	kstat_named_t	nputpage;	/* VOP_PUTPAGE */
+	kstat_named_t	nmap;		/* VOP_MAP */
+	kstat_named_t	naddmap;	/* VOP_ADDMAP */
+	kstat_named_t	ndelmap;	/* VOP_DELMAP */
+	kstat_named_t	npoll;		/* VOP_POLL */
+	kstat_named_t	ndump;		/* VOP_DUMP */
+	kstat_named_t	npathconf;	/* VOP_PATHCONF */
+	kstat_named_t	npageio;	/* VOP_PAGEIO */
+	kstat_named_t	ndumpctl;	/* VOP_DUMPCTL */
+	kstat_named_t	ndispose;	/* VOP_DISPOSE */
+	kstat_named_t	nsetsecattr;	/* VOP_SETSECATTR */
+	kstat_named_t	ngetsecattr;	/* VOP_GETSECATTR */
+	kstat_named_t	nshrlock;	/* VOP_SHRLOCK */
+	kstat_named_t	nvnevent;	/* VOP_VNEVENT */
+	kstat_named_t	nreqzcbuf;	/* VOP_REQZCBUF */
+	kstat_named_t	nretzcbuf;	/* VOP_RETZCBUF */
+} vopstats_t;
+
+/*
+ * The vnode is the focus of all file activity in UNIX.
+ * A vnode is allocated for each active file, each current
+ * directory, each mounted-on file, and the root.
+ *
+ * Each vnode is usually associated with a file-system-specific node (for
+ * UFS, this is the in-memory inode).  Generally, a vnode and an fs-node
+ * should be created and destroyed together as a pair.
+ *
+ * If a vnode is reused for a new file, it should be reinitialized by calling
+ * either vn_reinit() or vn_recycle().
+ *
+ * vn_reinit() resets the entire vnode as if it was returned by vn_alloc().
+ * The caller is responsible for setting up the entire vnode after calling
+ * vn_reinit().  This is important when using kmem caching where the vnode is
+ * allocated by a constructor, for instance.
+ *
+ * vn_recycle() is used when the file system keeps some state around in both
+ * the vnode and the associated FS-node.  In UFS, for example, the inode of
+ * a deleted file can be reused immediately.  The v_data, v_vfsp, v_op, etc.
+ * remains the same but certain fields related to the previous instance need
+ * to be reset.  In particular:
+ *	v_femhead
+ *	v_path
+ *	v_rdcnt, v_wrcnt
+ *	v_mmap_read, v_mmap_write
+ */
+
+/*
+ * vnode types.  VNON means no type.  These values are unrelated to
+ * values in on-disk inodes.
+ */
+typedef enum vtype {
+	VNON	= 0,
+	VREG	= 1,
+	VDIR	= 2,
+	VBLK	= 3,
+	VCHR	= 4,
+	VLNK	= 5,
+	VFIFO	= 6,
+	VDOOR	= 7,
+	VPROC	= 8,
+	VSOCK	= 9,
+	VPORT	= 10,
+	VBAD	= 11
+} vtype_t;
+
+/*
+ * VSD - Vnode Specific Data
+ * Used to associate additional private data with a vnode.
+ */
+struct vsd_node {
+	list_node_t vs_nodes;		/* list of all VSD nodes */
+	uint_t vs_nkeys;		/* entries in value array */
+	void **vs_value;		/* array of value/key */
+};
+
+/*
+ * Many of the fields in the vnode are read-only once they are initialized
+ * at vnode creation time.  Other fields are protected by locks.
+ *
+ * IMPORTANT: vnodes should be created ONLY by calls to vn_alloc().  They
+ * may not be embedded into the file-system specific node (inode).  The
+ * size of vnodes may change.
+ *
+ * The v_lock protects:
+ *   v_flag
+ *   v_stream
+ *   v_count
+ *   v_shrlocks
+ *   v_path
+ *   v_vsd
+ *   v_xattrdir
+ *
+ * A special lock (implemented by vn_vfswlock in vnode.c) protects:
+ *   v_vfsmountedhere
+ *
+ * The global flock_lock mutex (in flock.c) protects:
+ *   v_filocks
+ *
+ * IMPORTANT NOTE:
+ *
+ *   The following vnode fields are considered public and may safely be
+ *   accessed by file systems or other consumers:
+ *
+ *     v_lock
+ *     v_flag
+ *     v_count
+ *     v_data
+ *     v_vfsp
+ *     v_stream
+ *     v_type
+ *     v_rdev
+ *
+ * ALL OTHER FIELDS SHOULD BE ACCESSED ONLY BY THE OWNER OF THAT FIELD.
+ * In particular, file systems should not access other fields; they may
+ * change or even be removed.  The functionality which was once provided
+ * by these fields is available through vn_* functions.
+ */
+
+struct fem_head;	/* from fem.h */
+
+typedef struct vnode {
+	kmutex_t	v_lock;		/* protects vnode fields */
+	uint_t		v_flag;		/* vnode flags (see below) */
+	uint_t		v_count;	/* reference count */
+	void		*v_data;	/* private data for fs */
+	struct vfs	*v_vfsp;	/* ptr to containing VFS */
+	struct stdata	*v_stream;	/* associated stream */
+	enum vtype	v_type;		/* vnode type */
+	dev_t		v_rdev;		/* device (VCHR, VBLK) */
+
+	/* PRIVATE FIELDS BELOW - DO NOT USE */
+
+	struct vfs	*v_vfsmountedhere; /* ptr to vfs mounted here */
+	struct vnodeops	*v_op;		/* vnode operations */
+	struct page	*v_pages;	/* vnode pages list */
+	struct filock	*v_filocks;	/* ptr to filock list */
+	struct shrlocklist *v_shrlocks;	/* ptr to shrlock list */
+	krwlock_t	v_nbllock;	/* sync for NBMAND locks */
+	kcondvar_t	v_cv;		/* synchronize locking */
+	void		*v_locality;	/* hook for locality info */
+	struct fem_head	*v_femhead;	/* fs monitoring */
+	char		*v_path;	/* cached path */
+	uint_t		v_rdcnt;	/* open for read count  (VREG only) */
+	uint_t		v_wrcnt;	/* open for write count (VREG only) */
+	u_longlong_t	v_mmap_read;	/* mmap read count */
+	u_longlong_t	v_mmap_write;	/* mmap write count */
+	void		*v_mpssdata;	/* info for large page mappings */
+	void		*v_fopdata;	/* list of file ops event watches */
+	kmutex_t	v_vsd_lock;	/* protects v_vsd field */
+	struct vsd_node *v_vsd;		/* vnode specific data */
+	struct vnode	*v_xattrdir;	/* unnamed extended attr dir (GFS) */
+	uint_t		v_count_dnlc;	/* dnlc reference count */
+} vnode_t;
+
+#define	IS_DEVVP(vp)	\
+	((vp)->v_type == VCHR || (vp)->v_type == VBLK || (vp)->v_type == VFIFO)
+
+#define	VNODE_ALIGN	64
+/* Count of low-order 0 bits in a vnode *, based on size and alignment. */
+#if defined(_LP64)
+#define	VNODE_ALIGN_LOG2	8
+#else
+#define	VNODE_ALIGN_LOG2	7
+#endif
+
+/*
+ * vnode flags.
+ */
+#define	VROOT		0x01	/* root of its file system */
+#define	VNOCACHE	0x02	/* don't keep cache pages on vnode */
+#define	VNOMAP		0x04	/* file cannot be mapped/faulted */
+#define	VDUP		0x08	/* file should be dup'ed rather then opened */
+#define	VNOSWAP		0x10	/* file cannot be used as virtual swap device */
+#define	VNOMOUNT	0x20	/* file cannot be covered by mount */
+#define	VISSWAP		0x40	/* vnode is being used for swap */
+#define	VSWAPLIKE	0x80	/* vnode acts like swap (but may not be) */
+
+#define	IS_SWAPVP(vp)	(((vp)->v_flag & (VISSWAP | VSWAPLIKE)) != 0)
+
+typedef struct vn_vfslocks_entry {
+	rwstlock_t ve_lock;
+	void *ve_vpvfs;
+	struct vn_vfslocks_entry *ve_next;
+	uint32_t ve_refcnt;
+	char pad[64 - sizeof (rwstlock_t) - 2 * sizeof (void *) - \
+	    sizeof (uint32_t)];
+} vn_vfslocks_entry_t;
+
+/*
+ * The following two flags are used to lock the v_vfsmountedhere field
+ */
+#define	VVFSLOCK	0x100
+#define	VVFSWAIT	0x200
+
+/*
+ * Used to serialize VM operations on a vnode
+ */
+#define	VVMLOCK		0x400
+
+/*
+ * Tell vn_open() not to fail a directory open for writing but
+ * to go ahead and call VOP_OPEN() to let the filesystem check.
+ */
+#define	VDIROPEN	0x800
+
+/*
+ * Flag to let the VM system know that this file is most likely a binary
+ * or shared library since it has been mmap()ed EXEC at some time.
+ */
+#define	VVMEXEC		0x1000
+
+#define	VPXFS		0x2000  /* clustering: global fs proxy vnode */
+
+#define	IS_PXFSVP(vp)	((vp)->v_flag & VPXFS)
+
+#define	V_XATTRDIR	0x4000	/* attribute unnamed directory */
+
+#define	IS_XATTRDIR(vp)	((vp)->v_flag & V_XATTRDIR)
+
+#define	V_LOCALITY	0x8000	/* whether locality aware */
+
+/*
+ * Flag that indicates the VM should maintain the v_pages list with all modified
+ * pages on one end and unmodified pages at the other. This makes finding dirty
+ * pages to write back to disk much faster at the expense of taking a minor
+ * fault on the first store instruction which touches a writable page.
+ */
+#define	VMODSORT	(0x10000)
+#define	IS_VMODSORT(vp) \
+	(pvn_vmodsort_supported != 0 && ((vp)->v_flag  & VMODSORT) != 0)
+
+#define	VISSWAPFS	0x20000	/* vnode is being used for swapfs */
+
+/*
+ * The mdb memstat command assumes that IS_SWAPFSVP only uses the
+ * vnode's v_flag field.  If this changes, cache the additional
+ * fields in mdb; see vn_get in mdb/common/modules/genunix/memory.c
+ */
+#define	IS_SWAPFSVP(vp)	(((vp)->v_flag & VISSWAPFS) != 0)
+
+#define	V_SYSATTR	0x40000	/* vnode is a GFS system attribute */
+
+/*
+ * Vnode attributes.  A bit-mask is supplied as part of the
+ * structure to indicate the attributes the caller wants to
+ * set (setattr) or extract (getattr).
+ */
+
+/*
+ * Note that va_nodeid and va_nblocks are 64bit data type.
+ * We support large files over NFSV3. With Solaris client and
+ * Server that generates 64bit ino's and sizes these fields
+ * will overflow if they are 32 bit sizes.
+ */
+
+typedef struct vattr {
+	uint_t		va_mask;	/* bit-mask of attributes */
+	vtype_t		va_type;	/* vnode type (for create) */
+	mode_t		va_mode;	/* file access mode */
+	uid_t		va_uid;		/* owner user id */
+	gid_t		va_gid;		/* owner group id */
+	dev_t		va_fsid;	/* file system id (dev for now) */
+	u_longlong_t	va_nodeid;	/* node id */
+	nlink_t		va_nlink;	/* number of references to file */
+	u_offset_t	va_size;	/* file size in bytes */
+	timestruc_t	va_atime;	/* time of last access */
+	timestruc_t	va_mtime;	/* time of last modification */
+	timestruc_t	va_ctime;	/* time of last status change */
+	dev_t		va_rdev;	/* device the file represents */
+	uint_t		va_blksize;	/* fundamental block size */
+	u_longlong_t	va_nblocks;	/* # of blocks allocated */
+	uint_t		va_seq;		/* sequence number */
+} vattr_t;
+
+#define	AV_SCANSTAMP_SZ	32		/* length of anti-virus scanstamp */
+
+/*
+ * Structure of all optional attributes.
+ */
+typedef struct xoptattr {
+	timestruc_t	xoa_createtime;	/* Create time of file */
+	uint8_t		xoa_archive;
+	uint8_t		xoa_system;
+	uint8_t		xoa_readonly;
+	uint8_t		xoa_hidden;
+	uint8_t		xoa_nounlink;
+	uint8_t		xoa_immutable;
+	uint8_t		xoa_appendonly;
+	uint8_t		xoa_nodump;
+	uint8_t		xoa_opaque;
+	uint8_t		xoa_av_quarantined;
+	uint8_t		xoa_av_modified;
+	uint8_t		xoa_av_scanstamp[AV_SCANSTAMP_SZ];
+	uint8_t		xoa_reparse;
+	uint64_t	xoa_generation;
+	uint8_t		xoa_offline;
+	uint8_t		xoa_sparse;
+} xoptattr_t;
+
+/*
+ * The xvattr structure is really a variable length structure that
+ * is made up of:
+ * - The classic vattr_t (xva_vattr)
+ * - a 32 bit quantity (xva_mapsize) that specifies the size of the
+ *   attribute bitmaps in 32 bit words.
+ * - A pointer to the returned attribute bitmap (needed because the
+ *   previous element, the requested attribute bitmap) is variable lenth.
+ * - The requested attribute bitmap, which is an array of 32 bit words.
+ *   Callers use the XVA_SET_REQ() macro to set the bits corresponding to
+ *   the attributes that are being requested.
+ * - The returned attribute bitmap, which is an array of 32 bit words.
+ *   File systems that support optional attributes use the XVA_SET_RTN()
+ *   macro to set the bits corresponding to the attributes that are being
+ *   returned.
+ * - The xoptattr_t structure which contains the attribute values
+ *
+ * xva_mapsize determines how many words in the attribute bitmaps.
+ * Immediately following the attribute bitmaps is the xoptattr_t.
+ * xva_getxoptattr() is used to get the pointer to the xoptattr_t
+ * section.
+ */
+
+#define	XVA_MAPSIZE	3		/* Size of attr bitmaps */
+#define	XVA_MAGIC	0x78766174	/* Magic # for verification */
+
+/*
+ * The xvattr structure is an extensible structure which permits optional
+ * attributes to be requested/returned.  File systems may or may not support
+ * optional attributes.  They do so at their own discretion but if they do
+ * support optional attributes, they must register the VFSFT_XVATTR feature
+ * so that the optional attributes can be set/retrived.
+ *
+ * The fields of the xvattr structure are:
+ *
+ * xva_vattr - The first element of an xvattr is a legacy vattr structure
+ * which includes the common attributes.  If AT_XVATTR is set in the va_mask
+ * then the entire structure is treated as an xvattr.  If AT_XVATTR is not
+ * set, then only the xva_vattr structure can be used.
+ *
+ * xva_magic - 0x78766174 (hex for "xvat"). Magic number for verification.
+ *
+ * xva_mapsize - Size of requested and returned attribute bitmaps.
+ *
+ * xva_rtnattrmapp - Pointer to xva_rtnattrmap[].  We need this since the
+ * size of the array before it, xva_reqattrmap[], could change which means
+ * the location of xva_rtnattrmap[] could change.  This will allow unbundled
+ * file systems to find the location of xva_rtnattrmap[] when the sizes change.
+ *
+ * xva_reqattrmap[] - Array of requested attributes.  Attributes are
+ * represented by a specific bit in a specific element of the attribute
+ * map array.  Callers set the bits corresponding to the attributes
+ * that the caller wants to get/set.
+ *
+ * xva_rtnattrmap[] - Array of attributes that the file system was able to
+ * process.  Not all file systems support all optional attributes.  This map
+ * informs the caller which attributes the underlying file system was able
+ * to set/get.  (Same structure as the requested attributes array in terms
+ * of each attribute  corresponding to specific bits and array elements.)
+ *
+ * xva_xoptattrs - Structure containing values of optional attributes.
+ * These values are only valid if the corresponding bits in xva_reqattrmap
+ * are set and the underlying file system supports those attributes.
+ */
+typedef struct xvattr {
+	vattr_t		xva_vattr;	/* Embedded vattr structure */
+	uint32_t	xva_magic;	/* Magic Number */
+	uint32_t	xva_mapsize;	/* Size of attr bitmap (32-bit words) */
+	uint32_t	*xva_rtnattrmapp;	/* Ptr to xva_rtnattrmap[] */
+	uint32_t	xva_reqattrmap[XVA_MAPSIZE];	/* Requested attrs */
+	uint32_t	xva_rtnattrmap[XVA_MAPSIZE];	/* Returned attrs */
+	xoptattr_t	xva_xoptattrs;	/* Optional attributes */
+} xvattr_t;
+
+#ifdef _SYSCALL32
+/*
+ * For bigtypes time_t changed to 64 bit on the 64-bit kernel.
+ * Define an old version for user/kernel interface
+ */
+
+#if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
+#pragma pack(4)
+#endif
+
+typedef struct vattr32 {
+	uint32_t	va_mask;	/* bit-mask of attributes */
+	vtype_t		va_type;	/* vnode type (for create) */
+	mode32_t	va_mode;	/* file access mode */
+	uid32_t		va_uid;		/* owner user id */
+	gid32_t		va_gid;		/* owner group id */
+	dev32_t		va_fsid;	/* file system id (dev for now) */
+	u_longlong_t	va_nodeid;	/* node id */
+	nlink_t		va_nlink;	/* number of references to file */
+	u_offset_t	va_size;	/* file size in bytes */
+	timestruc32_t	va_atime;	/* time of last access */
+	timestruc32_t	va_mtime;	/* time of last modification */
+	timestruc32_t	va_ctime;	/* time of last status change */
+	dev32_t		va_rdev;	/* device the file represents */
+	uint32_t	va_blksize;	/* fundamental block size */
+	u_longlong_t	va_nblocks;	/* # of blocks allocated */
+	uint32_t	va_seq;		/* sequence number */
+} vattr32_t;
+
+#if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
+#pragma pack()
+#endif
+
+#else  /* not _SYSCALL32 */
+#define	vattr32		vattr
+typedef vattr_t		vattr32_t;
+#endif /* _SYSCALL32 */
+
+/*
+ * Attributes of interest to the caller of setattr or getattr.
+ */
+#define	AT_TYPE		0x00001
+#define	AT_MODE		0x00002
+#define	AT_UID		0x00004
+#define	AT_GID		0x00008
+#define	AT_FSID		0x00010
+#define	AT_NODEID	0x00020
+#define	AT_NLINK	0x00040
+#define	AT_SIZE		0x00080
+#define	AT_ATIME	0x00100
+#define	AT_MTIME	0x00200
+#define	AT_CTIME	0x00400
+#define	AT_RDEV		0x00800
+#define	AT_BLKSIZE	0x01000
+#define	AT_NBLOCKS	0x02000
+/*			0x04000 */	/* unused */
+#define	AT_SEQ		0x08000
+/*
+ * If AT_XVATTR is set then there are additional bits to process in
+ * the xvattr_t's attribute bitmap.  If this is not set then the bitmap
+ * MUST be ignored.  Note that this bit must be set/cleared explicitly.
+ * That is, setting AT_ALL will NOT set AT_XVATTR.
+ */
+#define	AT_XVATTR	0x10000
+
+#define	AT_ALL		(AT_TYPE|AT_MODE|AT_UID|AT_GID|AT_FSID|AT_NODEID|\
+			AT_NLINK|AT_SIZE|AT_ATIME|AT_MTIME|AT_CTIME|\
+			AT_RDEV|AT_BLKSIZE|AT_NBLOCKS|AT_SEQ)
+
+#define	AT_STAT		(AT_MODE|AT_UID|AT_GID|AT_FSID|AT_NODEID|AT_NLINK|\
+			AT_SIZE|AT_ATIME|AT_MTIME|AT_CTIME|AT_RDEV|AT_TYPE)
+
+#define	AT_TIMES	(AT_ATIME|AT_MTIME|AT_CTIME)
+
+#define	AT_NOSET	(AT_NLINK|AT_RDEV|AT_FSID|AT_NODEID|AT_TYPE|\
+			AT_BLKSIZE|AT_NBLOCKS|AT_SEQ)
+
+/*
+ * Attribute bits used in the extensible attribute's (xva's) attribute
+ * bitmaps.  Note that the bitmaps are made up of a variable length number
+ * of 32-bit words.  The convention is to use XAT{n}_{attrname} where "n"
+ * is the element in the bitmap (starting at 1).  This convention is for
+ * the convenience of the maintainer to keep track of which element each
+ * attribute belongs to.
+ *
+ * NOTE THAT CONSUMERS MUST *NOT* USE THE XATn_* DEFINES DIRECTLY.  CONSUMERS
+ * MUST USE THE XAT_* DEFINES.
+ */
+#define	XAT0_INDEX	0LL		/* Index into bitmap for XAT0 attrs */
+#define	XAT0_CREATETIME	0x00000001	/* Create time of file */
+#define	XAT0_ARCHIVE	0x00000002	/* Archive */
+#define	XAT0_SYSTEM	0x00000004	/* System */
+#define	XAT0_READONLY	0x00000008	/* Readonly */
+#define	XAT0_HIDDEN	0x00000010	/* Hidden */
+#define	XAT0_NOUNLINK	0x00000020	/* Nounlink */
+#define	XAT0_IMMUTABLE	0x00000040	/* immutable */
+#define	XAT0_APPENDONLY	0x00000080	/* appendonly */
+#define	XAT0_NODUMP	0x00000100	/* nodump */
+#define	XAT0_OPAQUE	0x00000200	/* opaque */
+#define	XAT0_AV_QUARANTINED	0x00000400	/* anti-virus quarantine */
+#define	XAT0_AV_MODIFIED	0x00000800	/* anti-virus modified */
+#define	XAT0_AV_SCANSTAMP	0x00001000	/* anti-virus scanstamp */
+#define	XAT0_REPARSE	0x00002000	/* FS reparse point */
+#define	XAT0_GEN	0x00004000	/* object generation number */
+#define	XAT0_OFFLINE	0x00008000	/* offline */
+#define	XAT0_SPARSE	0x00010000	/* sparse */
+
+#define	XAT0_ALL_ATTRS	(XAT0_CREATETIME|XAT0_ARCHIVE|XAT0_SYSTEM| \
+    XAT0_READONLY|XAT0_HIDDEN|XAT0_NOUNLINK|XAT0_IMMUTABLE|XAT0_APPENDONLY| \
+    XAT0_NODUMP|XAT0_OPAQUE|XAT0_AV_QUARANTINED|  XAT0_AV_MODIFIED| \
+    XAT0_AV_SCANSTAMP|XAT0_REPARSE|XATO_GEN|XAT0_OFFLINE|XAT0_SPARSE)
+
+/* Support for XAT_* optional attributes */
+#define	XVA_MASK		0xffffffff	/* Used to mask off 32 bits */
+#define	XVA_SHFT		32		/* Used to shift index */
+
+/*
+ * Used to pry out the index and attribute bits from the XAT_* attributes
+ * defined below.  Note that we're masking things down to 32 bits then
+ * casting to uint32_t.
+ */
+#define	XVA_INDEX(attr)		((uint32_t)(((attr) >> XVA_SHFT) & XVA_MASK))
+#define	XVA_ATTRBIT(attr)	((uint32_t)((attr) & XVA_MASK))
+
+/*
+ * The following defines present a "flat namespace" so that consumers don't
+ * need to keep track of which element belongs to which bitmap entry.
+ *
+ * NOTE THAT THESE MUST NEVER BE OR-ed TOGETHER
+ */
+#define	XAT_CREATETIME		((XAT0_INDEX << XVA_SHFT) | XAT0_CREATETIME)
+#define	XAT_ARCHIVE		((XAT0_INDEX << XVA_SHFT) | XAT0_ARCHIVE)
+#define	XAT_SYSTEM		((XAT0_INDEX << XVA_SHFT) | XAT0_SYSTEM)
+#define	XAT_READONLY		((XAT0_INDEX << XVA_SHFT) | XAT0_READONLY)
+#define	XAT_HIDDEN		((XAT0_INDEX << XVA_SHFT) | XAT0_HIDDEN)
+#define	XAT_NOUNLINK		((XAT0_INDEX << XVA_SHFT) | XAT0_NOUNLINK)
+#define	XAT_IMMUTABLE		((XAT0_INDEX << XVA_SHFT) | XAT0_IMMUTABLE)
+#define	XAT_APPENDONLY		((XAT0_INDEX << XVA_SHFT) | XAT0_APPENDONLY)
+#define	XAT_NODUMP		((XAT0_INDEX << XVA_SHFT) | XAT0_NODUMP)
+#define	XAT_OPAQUE		((XAT0_INDEX << XVA_SHFT) | XAT0_OPAQUE)
+#define	XAT_AV_QUARANTINED	((XAT0_INDEX << XVA_SHFT) | XAT0_AV_QUARANTINED)
+#define	XAT_AV_MODIFIED		((XAT0_INDEX << XVA_SHFT) | XAT0_AV_MODIFIED)
+#define	XAT_AV_SCANSTAMP	((XAT0_INDEX << XVA_SHFT) | XAT0_AV_SCANSTAMP)
+#define	XAT_REPARSE		((XAT0_INDEX << XVA_SHFT) | XAT0_REPARSE)
+#define	XAT_GEN			((XAT0_INDEX << XVA_SHFT) | XAT0_GEN)
+#define	XAT_OFFLINE		((XAT0_INDEX << XVA_SHFT) | XAT0_OFFLINE)
+#define	XAT_SPARSE		((XAT0_INDEX << XVA_SHFT) | XAT0_SPARSE)
+
+/*
+ * The returned attribute map array (xva_rtnattrmap[]) is located past the
+ * requested attribute map array (xva_reqattrmap[]).  Its location changes
+ * when the array sizes change.  We use a separate pointer in a known location
+ * (xva_rtnattrmapp) to hold the location of xva_rtnattrmap[].  This is
+ * set in xva_init()
+ */
+#define	XVA_RTNATTRMAP(xvap)	((xvap)->xva_rtnattrmapp)
+
+/*
+ * XVA_SET_REQ() sets an attribute bit in the proper element in the bitmap
+ * of requested attributes (xva_reqattrmap[]).
+ */
+#define	XVA_SET_REQ(xvap, attr)					\
+	ASSERT((xvap)->xva_vattr.va_mask | AT_XVATTR);		\
+	ASSERT((xvap)->xva_magic == XVA_MAGIC);			\
+	(xvap)->xva_reqattrmap[XVA_INDEX(attr)] |= XVA_ATTRBIT(attr)
+/*
+ * XVA_CLR_REQ() clears an attribute bit in the proper element in the bitmap
+ * of requested attributes (xva_reqattrmap[]).
+ */
+#define	XVA_CLR_REQ(xvap, attr)					\
+	ASSERT((xvap)->xva_vattr.va_mask | AT_XVATTR);		\
+	ASSERT((xvap)->xva_magic == XVA_MAGIC);			\
+	(xvap)->xva_reqattrmap[XVA_INDEX(attr)] &= ~XVA_ATTRBIT(attr)
+
+/*
+ * XVA_SET_RTN() sets an attribute bit in the proper element in the bitmap
+ * of returned attributes (xva_rtnattrmap[]).
+ */
+#define	XVA_SET_RTN(xvap, attr)					\
+	ASSERT((xvap)->xva_vattr.va_mask | AT_XVATTR);		\
+	ASSERT((xvap)->xva_magic == XVA_MAGIC);			\
+	(XVA_RTNATTRMAP(xvap))[XVA_INDEX(attr)] |= XVA_ATTRBIT(attr)
+
+/*
+ * XVA_ISSET_REQ() checks the requested attribute bitmap (xva_reqattrmap[])
+ * to see of the corresponding attribute bit is set.  If so, returns non-zero.
+ */
+#define	XVA_ISSET_REQ(xvap, attr)					\
+	((((xvap)->xva_vattr.va_mask | AT_XVATTR) &&			\
+		((xvap)->xva_magic == XVA_MAGIC) &&			\
+		((xvap)->xva_mapsize > XVA_INDEX(attr))) ?		\
+	((xvap)->xva_reqattrmap[XVA_INDEX(attr)] & XVA_ATTRBIT(attr)) :	0)
+
+/*
+ * XVA_ISSET_RTN() checks the returned attribute bitmap (xva_rtnattrmap[])
+ * to see of the corresponding attribute bit is set.  If so, returns non-zero.
+ */
+#define	XVA_ISSET_RTN(xvap, attr)					\
+	((((xvap)->xva_vattr.va_mask | AT_XVATTR) &&			\
+		((xvap)->xva_magic == XVA_MAGIC) &&			\
+		((xvap)->xva_mapsize > XVA_INDEX(attr))) ?		\
+	((XVA_RTNATTRMAP(xvap))[XVA_INDEX(attr)] & XVA_ATTRBIT(attr)) : 0)
+
+/*
+ *  Modes.  Some values same as S_xxx entries from stat.h for convenience.
+ */
+#define	VSUID		04000		/* set user id on execution */
+#define	VSGID		02000		/* set group id on execution */
+#define	VSVTX		01000		/* save swapped text even after use */
+
+/*
+ * Permissions.
+ */
+#define	VREAD		00400
+#define	VWRITE		00200
+#define	VEXEC		00100
+
+#define	MODEMASK	07777		/* mode bits plus permission bits */
+#define	PERMMASK	00777		/* permission bits */
+
+/*
+ * VOP_ACCESS flags
+ */
+#define	V_ACE_MASK	0x1	/* mask represents  NFSv4 ACE permissions */
+#define	V_APPEND	0x2	/* want to do append only check */
+
+/*
+ * Check whether mandatory file locking is enabled.
+ */
+
+#define	MANDMODE(mode)		(((mode) & (VSGID|(VEXEC>>3))) == VSGID)
+#define	MANDLOCK(vp, mode)	((vp)->v_type == VREG && MANDMODE(mode))
+
+/*
+ * Flags for vnode operations.
+ */
+enum rm		{ RMFILE, RMDIRECTORY };	/* rm or rmdir (remove) */
+enum symfollow	{ NO_FOLLOW, FOLLOW };		/* follow symlinks (or not) */
+enum vcexcl	{ NONEXCL, EXCL };		/* (non)excl create */
+enum create	{ CRCREAT, CRMKNOD, CRMKDIR };	/* reason for create */
+
+typedef enum rm		rm_t;
+typedef enum symfollow	symfollow_t;
+typedef enum vcexcl	vcexcl_t;
+typedef enum create	create_t;
+
+/* Vnode Events - Used by VOP_VNEVENT */
+typedef enum vnevent	{
+	VE_SUPPORT	= 0,	/* Query */
+	VE_RENAME_SRC	= 1,	/* Rename, with vnode as source */
+	VE_RENAME_DEST	= 2,	/* Rename, with vnode as target/destination */
+	VE_REMOVE	= 3,	/* Remove of vnode's name */
+	VE_RMDIR	= 4,	/* Remove of directory vnode's name */
+	VE_CREATE	= 5,	/* Create with vnode's name which exists */
+	VE_LINK		= 6, 	/* Link with vnode's name as source */
+	VE_RENAME_DEST_DIR	= 7, 	/* Rename with vnode as target dir */
+	VE_MOUNTEDOVER	= 8 	/* File or Filesystem got mounted over vnode */
+} vnevent_t;
+
+/*
+ * Values for checking vnode open and map counts
+ */
+enum v_mode { V_READ, V_WRITE, V_RDORWR, V_RDANDWR };
+
+typedef enum v_mode v_mode_t;
+
+#define	V_TRUE	1
+#define	V_FALSE	0
+
+/*
+ * Structure used on VOP_GETSECATTR and VOP_SETSECATTR operations
+ */
+
+typedef struct vsecattr {
+	uint_t		vsa_mask;	/* See below */
+	int		vsa_aclcnt;	/* ACL entry count */
+	void		*vsa_aclentp;	/* pointer to ACL entries */
+	int		vsa_dfaclcnt;	/* default ACL entry count */
+	void		*vsa_dfaclentp;	/* pointer to default ACL entries */
+	size_t		vsa_aclentsz;	/* ACE size in bytes of vsa_aclentp */
+	uint_t		vsa_aclflags;	/* ACE ACL flags */
+} vsecattr_t;
+
+/* vsa_mask values */
+#define	VSA_ACL			0x0001
+#define	VSA_ACLCNT		0x0002
+#define	VSA_DFACL		0x0004
+#define	VSA_DFACLCNT		0x0008
+#define	VSA_ACE			0x0010
+#define	VSA_ACECNT		0x0020
+#define	VSA_ACE_ALLTYPES	0x0040
+#define	VSA_ACE_ACLFLAGS	0x0080	/* get/set ACE ACL flags */
+
+/*
+ * Structure used by various vnode operations to determine
+ * the context (pid, host, identity) of a caller.
+ *
+ * The cc_caller_id is used to identify one or more callers who invoke
+ * operations, possibly on behalf of others.  For example, the NFS
+ * server could have it's own cc_caller_id which can be detected by
+ * vnode/vfs operations or (FEM) monitors on those operations.  New
+ * caller IDs are generated by fs_new_caller_id().
+ */
+typedef struct caller_context {
+	pid_t		cc_pid;		/* Process ID of the caller */
+	int		cc_sysid;	/* System ID, used for remote calls */
+	u_longlong_t	cc_caller_id;	/* Identifier for (set of) caller(s) */
+	ulong_t		cc_flags;
+} caller_context_t;
+
+/*
+ * Flags for caller context.  The caller sets CC_DONTBLOCK if it does not
+ * want to block inside of a FEM monitor.  The monitor will set CC_WOULDBLOCK
+ * and return EAGAIN if the operation would have blocked.
+ */
+#define	CC_WOULDBLOCK	0x01
+#define	CC_DONTBLOCK	0x02
+
+/*
+ * Structure tags for function prototypes, defined elsewhere.
+ */
+struct pathname;
+struct fid;
+struct flock64;
+struct flk_callback;
+struct shrlock;
+struct page;
+struct seg;
+struct as;
+struct pollhead;
+struct taskq;
+
+#ifdef	_KERNEL
+
+/*
+ * VNODE_OPS defines all the vnode operations.  It is used to define
+ * the vnodeops structure (below) and the fs_func_p union (vfs_opreg.h).
+ */
+#define	VNODE_OPS							\
+	int	(*vop_open)(vnode_t **, int, cred_t *,			\
+				caller_context_t *);			\
+	int	(*vop_close)(vnode_t *, int, int, offset_t, cred_t *,	\
+				caller_context_t *);			\
+	int	(*vop_read)(vnode_t *, uio_t *, int, cred_t *,		\
+				caller_context_t *);			\
+	int	(*vop_write)(vnode_t *, uio_t *, int, cred_t *,		\
+				caller_context_t *);			\
+	int	(*vop_ioctl)(vnode_t *, int, intptr_t, int, cred_t *,	\
+				int *, caller_context_t *);		\
+	int	(*vop_setfl)(vnode_t *, int, int, cred_t *,		\
+				caller_context_t *);			\
+	int	(*vop_getattr)(vnode_t *, vattr_t *, int, cred_t *,	\
+				caller_context_t *);			\
+	int	(*vop_setattr)(vnode_t *, vattr_t *, int, cred_t *,	\
+				caller_context_t *);			\
+	int	(*vop_access)(vnode_t *, int, int, cred_t *,		\
+				caller_context_t *);			\
+	int	(*vop_lookup)(vnode_t *, char *, vnode_t **,		\
+				struct pathname *,			\
+				int, vnode_t *, cred_t *,		\
+				caller_context_t *, int *,		\
+				struct pathname *);			\
+	int	(*vop_create)(vnode_t *, char *, vattr_t *, vcexcl_t,	\
+				int, vnode_t **, cred_t *, int,		\
+				caller_context_t *, vsecattr_t *);	\
+	int	(*vop_remove)(vnode_t *, char *, cred_t *,		\
+				caller_context_t *, int);		\
+	int	(*vop_link)(vnode_t *, vnode_t *, char *, cred_t *,	\
+				caller_context_t *, int);		\
+	int	(*vop_rename)(vnode_t *, char *, vnode_t *, char *,	\
+				cred_t *, caller_context_t *, int);	\
+	int	(*vop_mkdir)(vnode_t *, char *, vattr_t *, vnode_t **,	\
+				cred_t *, caller_context_t *, int,	\
+				vsecattr_t *);				\
+	int	(*vop_rmdir)(vnode_t *, char *, vnode_t *, cred_t *,	\
+				caller_context_t *, int);		\
+	int	(*vop_readdir)(vnode_t *, uio_t *, cred_t *, int *,	\
+				caller_context_t *, int);		\
+	int	(*vop_symlink)(vnode_t *, char *, vattr_t *, char *,	\
+				cred_t *, caller_context_t *, int);	\
+	int	(*vop_readlink)(vnode_t *, uio_t *, cred_t *,		\
+				caller_context_t *);			\
+	int	(*vop_fsync)(vnode_t *, int, cred_t *,			\
+				caller_context_t *);			\
+	void	(*vop_inactive)(vnode_t *, cred_t *,			\
+				caller_context_t *);			\
+	int	(*vop_fid)(vnode_t *, struct fid *,			\
+				caller_context_t *);			\
+	int	(*vop_rwlock)(vnode_t *, int, caller_context_t *);	\
+	void	(*vop_rwunlock)(vnode_t *, int, caller_context_t *);	\
+	int	(*vop_seek)(vnode_t *, offset_t, offset_t *,		\
+				caller_context_t *);			\
+	int	(*vop_cmp)(vnode_t *, vnode_t *, caller_context_t *);	\
+	int	(*vop_frlock)(vnode_t *, int, struct flock64 *,		\
+				int, offset_t,				\
+				struct flk_callback *, cred_t *,	\
+				caller_context_t *);			\
+	int	(*vop_space)(vnode_t *, int, struct flock64 *,		\
+				int, offset_t,				\
+				cred_t *, caller_context_t *);		\
+	int	(*vop_realvp)(vnode_t *, vnode_t **,			\
+				caller_context_t *);			\
+	int	(*vop_getpage)(vnode_t *, offset_t, size_t, uint_t *,	\
+				struct page **, size_t, struct seg *,	\
+				caddr_t, enum seg_rw, cred_t *,		\
+				caller_context_t *);			\
+	int	(*vop_putpage)(vnode_t *, offset_t, size_t,		\
+				int, cred_t *, caller_context_t *);	\
+	int	(*vop_map)(vnode_t *, offset_t, struct as *,		\
+				caddr_t *, size_t,			\
+				uchar_t, uchar_t, uint_t, cred_t *,	\
+				caller_context_t *);			\
+	int	(*vop_addmap)(vnode_t *, offset_t, struct as *,		\
+				caddr_t, size_t,			\
+				uchar_t, uchar_t, uint_t, cred_t *,	\
+				caller_context_t *);			\
+	int	(*vop_delmap)(vnode_t *, offset_t, struct as *,		\
+				caddr_t, size_t,			\
+				uint_t, uint_t, uint_t, cred_t *,	\
+				caller_context_t *);			\
+	int	(*vop_poll)(vnode_t *, short, int, short *,		\
+				struct pollhead **,			\
+				caller_context_t *);			\
+	int	(*vop_dump)(vnode_t *, caddr_t, offset_t, offset_t,	\
+				caller_context_t *);			\
+	int	(*vop_pathconf)(vnode_t *, int, ulong_t *, cred_t *,	\
+				caller_context_t *);			\
+	int	(*vop_pageio)(vnode_t *, struct page *,			\
+				u_offset_t, size_t, int, cred_t *,	\
+				caller_context_t *);			\
+	int	(*vop_dumpctl)(vnode_t *, int, offset_t *,		\
+				caller_context_t *);			\
+	void	(*vop_dispose)(vnode_t *, struct page *,		\
+				int, int, cred_t *,			\
+				caller_context_t *);			\
+	int	(*vop_setsecattr)(vnode_t *, vsecattr_t *,		\
+				int, cred_t *, caller_context_t *);	\
+	int	(*vop_getsecattr)(vnode_t *, vsecattr_t *,		\
+				int, cred_t *, caller_context_t *);	\
+	int	(*vop_shrlock)(vnode_t *, int, struct shrlock *,	\
+				int, cred_t *, caller_context_t *);	\
+	int	(*vop_vnevent)(vnode_t *, vnevent_t, vnode_t *,		\
+				char *, caller_context_t *);		\
+	int	(*vop_reqzcbuf)(vnode_t *, enum uio_rw, xuio_t *,	\
+				cred_t *, caller_context_t *);		\
+	int	(*vop_retzcbuf)(vnode_t *, xuio_t *, cred_t *,		\
+				caller_context_t *)
+	/* NB: No ";" */
+
+/*
+ * Operations on vnodes.  Note: File systems must never operate directly
+ * on a 'vnodeops' structure -- it WILL change in future releases!  They
+ * must use vn_make_ops() to create the structure.
+ */
+typedef struct vnodeops {
+	const char *vnop_name;
+	VNODE_OPS;	/* Signatures of all vnode operations (vops) */
+} vnodeops_t;
+
+typedef int (*fs_generic_func_p) ();	/* Generic vop/vfsop/femop/fsemop ptr */
+
+extern int	fop_open(vnode_t **, int, cred_t *, caller_context_t *);
+extern int	fop_close(vnode_t *, int, int, offset_t, cred_t *,
+				caller_context_t *);
+extern int	fop_read(vnode_t *, uio_t *, int, cred_t *, caller_context_t *);
+extern int	fop_write(vnode_t *, uio_t *, int, cred_t *,
+				caller_context_t *);
+extern int	fop_ioctl(vnode_t *, int, intptr_t, int, cred_t *, int *,
+				caller_context_t *);
+extern int	fop_setfl(vnode_t *, int, int, cred_t *, caller_context_t *);
+extern int	fop_getattr(vnode_t *, vattr_t *, int, cred_t *,
+				caller_context_t *);
+extern int	fop_setattr(vnode_t *, vattr_t *, int, cred_t *,
+				caller_context_t *);
+extern int	fop_access(vnode_t *, int, int, cred_t *, caller_context_t *);
+extern int	fop_lookup(vnode_t *, char *, vnode_t **, struct pathname *,
+				int, vnode_t *, cred_t *, caller_context_t *,
+				int *, struct pathname *);
+extern int	fop_create(vnode_t *, char *, vattr_t *, vcexcl_t, int,
+				vnode_t **, cred_t *, int, caller_context_t *,
+				vsecattr_t *);
+extern int	fop_remove(vnode_t *vp, char *, cred_t *, caller_context_t *,
+				int);
+extern int	fop_link(vnode_t *, vnode_t *, char *, cred_t *,
+				caller_context_t *, int);
+extern int	fop_rename(vnode_t *, char *, vnode_t *, char *, cred_t *,
+				caller_context_t *, int);
+extern int	fop_mkdir(vnode_t *, char *, vattr_t *, vnode_t **, cred_t *,
+				caller_context_t *, int, vsecattr_t *);
+extern int	fop_rmdir(vnode_t *, char *, vnode_t *, cred_t *,
+				caller_context_t *, int);
+extern int	fop_readdir(vnode_t *, uio_t *, cred_t *, int *,
+				caller_context_t *, int);
+extern int	fop_symlink(vnode_t *, char *, vattr_t *, char *, cred_t *,
+				caller_context_t *, int);
+extern int	fop_readlink(vnode_t *, uio_t *, cred_t *, caller_context_t *);
+extern int	fop_fsync(vnode_t *, int, cred_t *, caller_context_t *);
+extern void	fop_inactive(vnode_t *, cred_t *, caller_context_t *);
+extern int	fop_fid(vnode_t *, struct fid *, caller_context_t *);
+extern int	fop_rwlock(vnode_t *, int, caller_context_t *);
+extern void	fop_rwunlock(vnode_t *, int, caller_context_t *);
+extern int	fop_seek(vnode_t *, offset_t, offset_t *, caller_context_t *);
+extern int	fop_cmp(vnode_t *, vnode_t *, caller_context_t *);
+extern int	fop_frlock(vnode_t *, int, struct flock64 *, int, offset_t,
+				struct flk_callback *, cred_t *,
+				caller_context_t *);
+extern int	fop_space(vnode_t *, int, struct flock64 *, int, offset_t,
+				cred_t *, caller_context_t *);
+extern int	fop_realvp(vnode_t *, vnode_t **, caller_context_t *);
+extern int	fop_getpage(vnode_t *, offset_t, size_t, uint_t *,
+				struct page **, size_t, struct seg *,
+				caddr_t, enum seg_rw, cred_t *,
+				caller_context_t *);
+extern int	fop_putpage(vnode_t *, offset_t, size_t, int, cred_t *,
+				caller_context_t *);
+extern int	fop_map(vnode_t *, offset_t, struct as *, caddr_t *, size_t,
+				uchar_t, uchar_t, uint_t, cred_t *cr,
+				caller_context_t *);
+extern int	fop_addmap(vnode_t *, offset_t, struct as *, caddr_t, size_t,
+				uchar_t, uchar_t, uint_t, cred_t *,
+				caller_context_t *);
+extern int	fop_delmap(vnode_t *, offset_t, struct as *, caddr_t, size_t,
+				uint_t, uint_t, uint_t, cred_t *,
+				caller_context_t *);
+extern int	fop_poll(vnode_t *, short, int, short *, struct pollhead **,
+				caller_context_t *);
+extern int	fop_dump(vnode_t *, caddr_t, offset_t, offset_t,
+    caller_context_t *);
+extern int	fop_pathconf(vnode_t *, int, ulong_t *, cred_t *,
+				caller_context_t *);
+extern int	fop_pageio(vnode_t *, struct page *, u_offset_t, size_t, int,
+				cred_t *, caller_context_t *);
+extern int	fop_dumpctl(vnode_t *, int, offset_t *, caller_context_t *);
+extern void	fop_dispose(vnode_t *, struct page *, int, int, cred_t *,
+				caller_context_t *);
+extern int	fop_setsecattr(vnode_t *, vsecattr_t *, int, cred_t *,
+				caller_context_t *);
+extern int	fop_getsecattr(vnode_t *, vsecattr_t *, int, cred_t *,
+				caller_context_t *);
+extern int	fop_shrlock(vnode_t *, int, struct shrlock *, int, cred_t *,
+				caller_context_t *);
+extern int	fop_vnevent(vnode_t *, vnevent_t, vnode_t *, char *,
+				caller_context_t *);
+extern int	fop_reqzcbuf(vnode_t *, enum uio_rw, xuio_t *, cred_t *,
+				caller_context_t *);
+extern int	fop_retzcbuf(vnode_t *, xuio_t *, cred_t *, caller_context_t *);
+
+#endif	/* _KERNEL */
+
+#define	VOP_OPEN(vpp, mode, cr, ct) \
+	fop_open(vpp, mode, cr, ct)
+#define	VOP_CLOSE(vp, f, c, o, cr, ct) \
+	fop_close(vp, f, c, o, cr, ct)
+#define	VOP_READ(vp, uiop, iof, cr, ct) \
+	fop_read(vp, uiop, iof, cr, ct)
+#define	VOP_WRITE(vp, uiop, iof, cr, ct) \
+	fop_write(vp, uiop, iof, cr, ct)
+#define	VOP_IOCTL(vp, cmd, a, f, cr, rvp, ct) \
+	fop_ioctl(vp, cmd, a, f, cr, rvp, ct)
+#define	VOP_SETFL(vp, f, a, cr, ct) \
+	fop_setfl(vp, f, a, cr, ct)
+#define	VOP_GETATTR(vp, vap, f, cr, ct) \
+	fop_getattr(vp, vap, f, cr, ct)
+#define	VOP_SETATTR(vp, vap, f, cr, ct) \
+	fop_setattr(vp, vap, f, cr, ct)
+#define	VOP_ACCESS(vp, mode, f, cr, ct) \
+	fop_access(vp, mode, f, cr, ct)
+#define	VOP_LOOKUP(vp, cp, vpp, pnp, f, rdir, cr, ct, defp, rpnp) \
+	fop_lookup(vp, cp, vpp, pnp, f, rdir, cr, ct, defp, rpnp)
+#define	VOP_CREATE(dvp, p, vap, ex, mode, vpp, cr, flag, ct, vsap) \
+	fop_create(dvp, p, vap, ex, mode, vpp, cr, flag, ct, vsap)
+#define	VOP_REMOVE(dvp, p, cr, ct, f) \
+	fop_remove(dvp, p, cr, ct, f)
+#define	VOP_LINK(tdvp, fvp, p, cr, ct, f) \
+	fop_link(tdvp, fvp, p, cr, ct, f)
+#define	VOP_RENAME(fvp, fnm, tdvp, tnm, cr, ct, f) \
+	fop_rename(fvp, fnm, tdvp, tnm, cr, ct, f)
+#define	VOP_MKDIR(dp, p, vap, vpp, cr, ct, f, vsap) \
+	fop_mkdir(dp, p, vap, vpp, cr, ct, f, vsap)
+#define	VOP_RMDIR(dp, p, cdir, cr, ct, f) \
+	fop_rmdir(dp, p, cdir, cr, ct, f)
+#define	VOP_READDIR(vp, uiop, cr, eofp, ct, f) \
+	fop_readdir(vp, uiop, cr, eofp, ct, f)
+#define	VOP_SYMLINK(dvp, lnm, vap, tnm, cr, ct, f) \
+	fop_symlink(dvp, lnm, vap, tnm, cr, ct, f)
+#define	VOP_READLINK(vp, uiop, cr, ct) \
+	fop_readlink(vp, uiop, cr, ct)
+#define	VOP_FSYNC(vp, syncflag, cr, ct) \
+	fop_fsync(vp, syncflag, cr, ct)
+#define	VOP_INACTIVE(vp, cr, ct) \
+	fop_inactive(vp, cr, ct)
+#define	VOP_FID(vp, fidp, ct) \
+	fop_fid(vp, fidp, ct)
+#define	VOP_RWLOCK(vp, w, ct) \
+	fop_rwlock(vp, w, ct)
+#define	VOP_RWUNLOCK(vp, w, ct) \
+	fop_rwunlock(vp, w, ct)
+#define	VOP_SEEK(vp, ooff, noffp, ct) \
+	fop_seek(vp, ooff, noffp, ct)
+#define	VOP_CMP(vp1, vp2, ct) \
+	fop_cmp(vp1, vp2, ct)
+#define	VOP_FRLOCK(vp, cmd, a, f, o, cb, cr, ct) \
+	fop_frlock(vp, cmd, a, f, o, cb, cr, ct)
+#define	VOP_SPACE(vp, cmd, a, f, o, cr, ct) \
+	fop_space(vp, cmd, a, f, o, cr, ct)
+#define	VOP_REALVP(vp1, vp2, ct) \
+	fop_realvp(vp1, vp2, ct)
+#define	VOP_GETPAGE(vp, of, sz, pr, pl, ps, sg, a, rw, cr, ct) \
+	fop_getpage(vp, of, sz, pr, pl, ps, sg, a, rw, cr, ct)
+#define	VOP_PUTPAGE(vp, of, sz, fl, cr, ct) \
+	fop_putpage(vp, of, sz, fl, cr, ct)
+#define	VOP_MAP(vp, of, as, a, sz, p, mp, fl, cr, ct) \
+	fop_map(vp, of, as, a, sz, p, mp, fl, cr, ct)
+#define	VOP_ADDMAP(vp, of, as, a, sz, p, mp, fl, cr, ct) \
+	fop_addmap(vp, of, as, a, sz, p, mp, fl, cr, ct)
+#define	VOP_DELMAP(vp, of, as, a, sz, p, mp, fl, cr, ct) \
+	fop_delmap(vp, of, as, a, sz, p, mp, fl, cr, ct)
+#define	VOP_POLL(vp, events, anyyet, reventsp, phpp, ct) \
+	fop_poll(vp, events, anyyet, reventsp, phpp, ct)
+#define	VOP_DUMP(vp, addr, bn, count, ct) \
+	fop_dump(vp, addr, bn, count, ct)
+#define	VOP_PATHCONF(vp, cmd, valp, cr, ct) \
+	fop_pathconf(vp, cmd, valp, cr, ct)
+#define	VOP_PAGEIO(vp, pp, io_off, io_len, flags, cr, ct) \
+	fop_pageio(vp, pp, io_off, io_len, flags, cr, ct)
+#define	VOP_DUMPCTL(vp, action, blkp, ct) \
+	fop_dumpctl(vp, action, blkp, ct)
+#define	VOP_DISPOSE(vp, pp, flag, dn, cr, ct) \
+	fop_dispose(vp, pp, flag, dn, cr, ct)
+#define	VOP_GETSECATTR(vp, vsap, f, cr, ct) \
+	fop_getsecattr(vp, vsap, f, cr, ct)
+#define	VOP_SETSECATTR(vp, vsap, f, cr, ct) \
+	fop_setsecattr(vp, vsap, f, cr, ct)
+#define	VOP_SHRLOCK(vp, cmd, shr, f, cr, ct) \
+	fop_shrlock(vp, cmd, shr, f, cr, ct)
+#define	VOP_VNEVENT(vp, vnevent, dvp, fnm, ct) \
+	fop_vnevent(vp, vnevent, dvp, fnm, ct)
+#define	VOP_REQZCBUF(vp, rwflag, xuiop, cr, ct) \
+	fop_reqzcbuf(vp, rwflag, xuiop, cr, ct)
+#define	VOP_RETZCBUF(vp, xuiop, cr, ct) \
+	fop_retzcbuf(vp, xuiop, cr, ct)
+
+#define	VOPNAME_OPEN		"open"
+#define	VOPNAME_CLOSE		"close"
+#define	VOPNAME_READ		"read"
+#define	VOPNAME_WRITE		"write"
+#define	VOPNAME_IOCTL		"ioctl"
+#define	VOPNAME_SETFL		"setfl"
+#define	VOPNAME_GETATTR		"getattr"
+#define	VOPNAME_SETATTR		"setattr"
+#define	VOPNAME_ACCESS		"access"
+#define	VOPNAME_LOOKUP		"lookup"
+#define	VOPNAME_CREATE		"create"
+#define	VOPNAME_REMOVE		"remove"
+#define	VOPNAME_LINK		"link"
+#define	VOPNAME_RENAME		"rename"
+#define	VOPNAME_MKDIR		"mkdir"
+#define	VOPNAME_RMDIR		"rmdir"
+#define	VOPNAME_READDIR		"readdir"
+#define	VOPNAME_SYMLINK		"symlink"
+#define	VOPNAME_READLINK	"readlink"
+#define	VOPNAME_FSYNC		"fsync"
+#define	VOPNAME_INACTIVE	"inactive"
+#define	VOPNAME_FID		"fid"
+#define	VOPNAME_RWLOCK		"rwlock"
+#define	VOPNAME_RWUNLOCK	"rwunlock"
+#define	VOPNAME_SEEK		"seek"
+#define	VOPNAME_CMP		"cmp"
+#define	VOPNAME_FRLOCK		"frlock"
+#define	VOPNAME_SPACE		"space"
+#define	VOPNAME_REALVP		"realvp"
+#define	VOPNAME_GETPAGE		"getpage"
+#define	VOPNAME_PUTPAGE		"putpage"
+#define	VOPNAME_MAP		"map"
+#define	VOPNAME_ADDMAP		"addmap"
+#define	VOPNAME_DELMAP		"delmap"
+#define	VOPNAME_POLL		"poll"
+#define	VOPNAME_DUMP		"dump"
+#define	VOPNAME_PATHCONF	"pathconf"
+#define	VOPNAME_PAGEIO		"pageio"
+#define	VOPNAME_DUMPCTL		"dumpctl"
+#define	VOPNAME_DISPOSE		"dispose"
+#define	VOPNAME_GETSECATTR	"getsecattr"
+#define	VOPNAME_SETSECATTR	"setsecattr"
+#define	VOPNAME_SHRLOCK		"shrlock"
+#define	VOPNAME_VNEVENT		"vnevent"
+#define	VOPNAME_REQZCBUF	"reqzcbuf"
+#define	VOPNAME_RETZCBUF	"retzcbuf"
+
+/*
+ * Flags for VOP_LOOKUP
+ *
+ * Defined in file.h, but also possible, FIGNORECASE and FSEARCH
+ *
+ */
+#define	LOOKUP_DIR		0x01	/* want parent dir vp */
+#define	LOOKUP_XATTR		0x02	/* lookup up extended attr dir */
+#define	CREATE_XATTR_DIR	0x04	/* Create extended attr dir */
+#define	LOOKUP_HAVE_SYSATTR_DIR	0x08	/* Already created virtual GFS dir */
+
+/*
+ * Flags for VOP_READDIR
+ */
+#define	V_RDDIR_ENTFLAGS	0x01	/* request dirent flags */
+#define	V_RDDIR_ACCFILTER	0x02	/* filter out inaccessible dirents */
+
+/*
+ * Flags for VOP_RWLOCK/VOP_RWUNLOCK
+ * VOP_RWLOCK will return the flag that was actually set, or -1 if none.
+ */
+#define	V_WRITELOCK_TRUE	(1)	/* Request write-lock on the vnode */
+#define	V_WRITELOCK_FALSE	(0)	/* Request read-lock on the vnode */
+
+/*
+ * Flags for VOP_DUMPCTL
+ */
+#define	DUMP_ALLOC	0
+#define	DUMP_FREE	1
+#define	DUMP_SCAN	2
+
+/*
+ * Public vnode manipulation functions.
+ */
+#ifdef	_KERNEL
+
+vnode_t *vn_alloc(int);
+void	vn_reinit(vnode_t *);
+void	vn_recycle(vnode_t *);
+void	vn_free(vnode_t *);
+
+int	vn_is_readonly(vnode_t *);
+int   	vn_is_opened(vnode_t *, v_mode_t);
+int   	vn_is_mapped(vnode_t *, v_mode_t);
+int   	vn_has_other_opens(vnode_t *, v_mode_t);
+void	vn_open_upgrade(vnode_t *, int);
+void	vn_open_downgrade(vnode_t *, int);
+
+int	vn_can_change_zones(vnode_t *vp);
+
+int	vn_has_flocks(vnode_t *);
+int	vn_has_mandatory_locks(vnode_t *, int);
+int	vn_has_cached_data(vnode_t *);
+
+void	vn_setops(vnode_t *, vnodeops_t *);
+vnodeops_t *vn_getops(vnode_t *);
+int	vn_matchops(vnode_t *, vnodeops_t *);
+int	vn_matchopval(vnode_t *, char *, fs_generic_func_p);
+int	vn_ismntpt(vnode_t *);
+
+struct vfs *vn_mountedvfs(vnode_t *);
+
+int	vn_in_dnlc(vnode_t *);
+
+void	vn_create_cache(void);
+void	vn_destroy_cache(void);
+
+void	vn_freevnodeops(vnodeops_t *);
+
+int	vn_open(char *pnamep, enum uio_seg seg, int filemode, int createmode,
+		struct vnode **vpp, enum create crwhy, mode_t umask);
+int	vn_openat(char *pnamep, enum uio_seg seg, int filemode, int createmode,
+		struct vnode **vpp, enum create crwhy,
+		mode_t umask, struct vnode *startvp, int fd);
+int	vn_create(char *pnamep, enum uio_seg seg, struct vattr *vap,
+		enum vcexcl excl, int mode, struct vnode **vpp,
+		enum create why, int flag, mode_t umask);
+int	vn_createat(char *pnamep, enum uio_seg seg, struct vattr *vap,
+		enum vcexcl excl, int mode, struct vnode **vpp,
+		enum create why, int flag, mode_t umask, struct vnode *startvp);
+int	vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, ssize_t len,
+		offset_t offset, enum uio_seg seg, int ioflag, rlim64_t ulimit,
+		cred_t *cr, ssize_t *residp);
+void	vn_rele(struct vnode *vp);
+void	vn_rele_async(struct vnode *vp, struct taskq *taskq);
+void	vn_rele_dnlc(struct vnode *vp);
+void	vn_rele_stream(struct vnode *vp);
+int	vn_link(char *from, char *to, enum uio_seg seg);
+int	vn_linkat(vnode_t *fstartvp, char *from, enum symfollow follow,
+		vnode_t *tstartvp, char *to, enum uio_seg seg);
+int	vn_rename(char *from, char *to, enum uio_seg seg);
+int	vn_renameat(vnode_t *fdvp, char *fname, vnode_t *tdvp, char *tname,
+		enum uio_seg seg);
+int	vn_remove(char *fnamep, enum uio_seg seg, enum rm dirflag);
+int	vn_removeat(vnode_t *startvp, char *fnamep, enum uio_seg seg,
+		enum rm dirflag);
+int	vn_compare(vnode_t *vp1, vnode_t *vp2);
+int	vn_vfswlock(struct vnode *vp);
+int	vn_vfswlock_wait(struct vnode *vp);
+int	vn_vfsrlock(struct vnode *vp);
+int	vn_vfsrlock_wait(struct vnode *vp);
+void	vn_vfsunlock(struct vnode *vp);
+int	vn_vfswlock_held(struct vnode *vp);
+vnode_t *specvp(struct vnode *vp, dev_t dev, vtype_t type, struct cred *cr);
+vnode_t *makespecvp(dev_t dev, vtype_t type);
+vn_vfslocks_entry_t *vn_vfslocks_getlock(void *);
+void	vn_vfslocks_rele(vn_vfslocks_entry_t *);
+boolean_t vn_is_reparse(vnode_t *, cred_t *, caller_context_t *);
+
+void vn_copypath(struct vnode *src, struct vnode *dst);
+void vn_setpath_str(struct vnode *vp, const char *str, size_t len);
+void vn_setpath(vnode_t *rootvp, struct vnode *startvp, struct vnode *vp,
+    const char *path, size_t plen);
+void vn_renamepath(vnode_t *dvp, vnode_t *vp, const char *nm, size_t len);
+
+/* Vnode event notification */
+void	vnevent_rename_src(vnode_t *, vnode_t *, char *, caller_context_t *);
+void	vnevent_rename_dest(vnode_t *, vnode_t *, char *, caller_context_t *);
+void	vnevent_remove(vnode_t *, vnode_t *, char *, caller_context_t *);
+void	vnevent_rmdir(vnode_t *, vnode_t *, char *, caller_context_t *);
+void	vnevent_create(vnode_t *, caller_context_t *);
+void	vnevent_link(vnode_t *, caller_context_t *);
+void	vnevent_rename_dest_dir(vnode_t *, caller_context_t *ct);
+void	vnevent_mountedover(vnode_t *, caller_context_t *);
+int	vnevent_support(vnode_t *, caller_context_t *);
+
+/* Vnode specific data */
+void vsd_create(uint_t *, void (*)(void *));
+void vsd_destroy(uint_t *);
+void *vsd_get(vnode_t *, uint_t);
+int vsd_set(vnode_t *, uint_t, void *);
+void vsd_free(vnode_t *);
+
+/*
+ * Extensible vnode attribute (xva) routines:
+ * xva_init() initializes an xvattr_t (zero struct, init mapsize, set AT_XATTR)
+ * xva_getxoptattr() returns a ponter to the xoptattr_t section of xvattr_t
+ */
+void		xva_init(xvattr_t *);
+xoptattr_t	*xva_getxoptattr(xvattr_t *);	/* Get ptr to xoptattr_t */
+
+void xattr_init(void);		/* Initialize vnodeops for xattrs */
+
+/* GFS tunnel for xattrs */
+int xattr_dir_lookup(vnode_t *, vnode_t **, int, cred_t *);
+
+/* Reparse Point */
+void reparse_point_init(void);
+
+/* Context identification */
+u_longlong_t	fs_new_caller_id();
+
+int	vn_vmpss_usepageio(vnode_t *);
+
+/*
+ * Needed for use of IS_VMODSORT() in kernel.
+ */
+extern uint_t pvn_vmodsort_supported;
+
+#define	VN_HOLD(vp)	{ \
+	mutex_enter(&(vp)->v_lock); \
+	(vp)->v_count++; \
+	mutex_exit(&(vp)->v_lock); \
+}
+
+#define	VN_RELE(vp)	{ \
+	vn_rele(vp); \
+}
+
+#define	VN_RELE_ASYNC(vp, taskq)	{ \
+	vn_rele_async(vp, taskq); \
+}
+
+#define	VN_SET_VFS_TYPE_DEV(vp, vfsp, type, dev)	{ \
+	(vp)->v_vfsp = (vfsp); \
+	(vp)->v_type = (type); \
+	(vp)->v_rdev = (dev); \
+}
+
+/*
+ * Compare two vnodes for equality.  In general this macro should be used
+ * in preference to calling VOP_CMP directly.
+ */
+#define	VN_CMP(VP1, VP2)	((VP1) == (VP2) ? 1 : 	\
+	((VP1) && (VP2) && (vn_getops(VP1) == vn_getops(VP2)) ? \
+	VOP_CMP(VP1, VP2, NULL) : 0))
+
+/*
+ * Some well-known global vnodes used by the VM system to name pages.
+ */
+extern struct vnode kvps[];
+
+typedef enum {
+	KV_KVP,		/* vnode for all segkmem pages */
+	KV_ZVP,		/* vnode for all ZFS pages */
+#if defined(__sparc)
+	KV_MPVP,	/* vnode for all page_t meta-pages */
+	KV_PROMVP,	/* vnode for all PROM pages */
+#endif	/* __sparc */
+	KV_MAX		/* total number of vnodes in kvps[] */
+} kvps_index_t;
+
+#define	VN_ISKAS(vp)	((vp) >= &kvps[0] && (vp) < &kvps[KV_MAX])
+
+#endif	/* _KERNEL */
+
+/*
+ * Flags to VOP_SETATTR/VOP_GETATTR.
+ */
+#define	ATTR_UTIME	0x01	/* non-default utime(2) request */
+#define	ATTR_EXEC	0x02	/* invocation from exec(2) */
+#define	ATTR_COMM	0x04	/* yield common vp attributes */
+#define	ATTR_HINT	0x08	/* information returned will be `hint' */
+#define	ATTR_REAL	0x10	/* yield attributes of the real vp */
+#define	ATTR_NOACLCHECK	0x20	/* Don't check ACL when checking permissions */
+#define	ATTR_TRIGGER	0x40	/* Mount first if vnode is a trigger mount */
+/*
+ * Generally useful macros.
+ */
+#define	VBSIZE(vp)	((vp)->v_vfsp->vfs_bsize)
+
+#define	VTOZONE(vp)	((vp)->v_vfsp->vfs_zone)
+
+#define	NULLVP		((struct vnode *)0)
+#define	NULLVPP		((struct vnode **)0)
+
+#ifdef	_KERNEL
+
+/*
+ * Structure used while handling asynchronous VOP_PUTPAGE operations.
+ */
+struct async_reqs {
+	struct async_reqs *a_next;	/* pointer to next arg struct */
+	struct vnode *a_vp;		/* vnode pointer */
+	u_offset_t a_off;			/* offset in file */
+	uint_t a_len;			/* size of i/o request */
+	int a_flags;			/* flags to indicate operation type */
+	struct cred *a_cred;		/* cred pointer	*/
+	ushort_t a_prealloced;		/* set if struct is pre-allocated */
+};
+
+/*
+ * VN_DISPOSE() -- given a page pointer, safely invoke VOP_DISPOSE().
+ * Note that there is no guarantee that the page passed in will be
+ * freed.  If that is required, then a check after calling VN_DISPOSE would
+ * be necessary to ensure the page was freed.
+ */
+#define	VN_DISPOSE(pp, flag, dn, cr)	{ \
+	if ((pp)->p_vnode != NULL && !VN_ISKAS((pp)->p_vnode)) \
+		VOP_DISPOSE((pp)->p_vnode, (pp), (flag), (dn), (cr), NULL); \
+	else if ((flag) == B_FREE) \
+		page_free((pp), (dn)); \
+	else \
+		page_destroy((pp), (dn)); \
+	}
+
+#endif	/* _KERNEL */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_VNODE_H */
diff --git a/uts/common/sys/zmod.h b/uts/common/sys/zmod.h
new file mode 100644
index 000000000000..ba0267203ce3
--- /dev/null
+++ b/uts/common/sys/zmod.h
@@ -0,0 +1,68 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_ZMOD_H
+#define	_ZMOD_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * zmod - RFC-1950-compatible decompression routines
+ *
+ * This file provides the public interfaces to zmod, an in-kernel RFC 1950
+ * decompression library.  More information about the implementation of these
+ * interfaces can be found in the usr/src/uts/common/zmod/ directory.
+ */
+
+#define	Z_OK		0
+#define	Z_STREAM_END	1
+#define	Z_NEED_DICT	2
+#define	Z_ERRNO		(-1)
+#define	Z_STREAM_ERROR	(-2)
+#define	Z_DATA_ERROR	(-3)
+#define	Z_MEM_ERROR	(-4)
+#define	Z_BUF_ERROR	(-5)
+#define	Z_VERSION_ERROR	(-6)
+
+#define	Z_NO_COMPRESSION	0
+#define	Z_BEST_SPEED		1
+#define	Z_BEST_COMPRESSION	9
+#define	Z_DEFAULT_COMPRESSION	(-1)
+
+extern int z_uncompress(void *, size_t *, const void *, size_t);
+extern int z_compress(void *, size_t *, const void *, size_t);
+extern int z_compress_level(void *, size_t *, const void *, size_t, int);
+extern const char *z_strerror(int);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _ZMOD_H */
diff --git a/uts/common/zmod/adler32.c b/uts/common/zmod/adler32.c
new file mode 100644
index 000000000000..59d84632ed5d
--- /dev/null
+++ b/uts/common/zmod/adler32.c
@@ -0,0 +1,149 @@
+/* adler32.c -- compute the Adler-32 checksum of a data stream
+ * Copyright (C) 1995-2004 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#define ZLIB_INTERNAL
+#include "zlib.h"
+
+#define BASE 65521UL    /* largest prime smaller than 65536 */
+#define NMAX 5552
+/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
+
+#define DO1(buf,i)  {adler += (buf)[i]; sum2 += adler;}
+#define DO2(buf,i)  DO1(buf,i); DO1(buf,i+1);
+#define DO4(buf,i)  DO2(buf,i); DO2(buf,i+2);
+#define DO8(buf,i)  DO4(buf,i); DO4(buf,i+4);
+#define DO16(buf)   DO8(buf,0); DO8(buf,8);
+
+/* use NO_DIVIDE if your processor does not do division in hardware */
+#ifdef NO_DIVIDE
+#  define MOD(a) \
+    do { \
+        if (a >= (BASE << 16)) a -= (BASE << 16); \
+        if (a >= (BASE << 15)) a -= (BASE << 15); \
+        if (a >= (BASE << 14)) a -= (BASE << 14); \
+        if (a >= (BASE << 13)) a -= (BASE << 13); \
+        if (a >= (BASE << 12)) a -= (BASE << 12); \
+        if (a >= (BASE << 11)) a -= (BASE << 11); \
+        if (a >= (BASE << 10)) a -= (BASE << 10); \
+        if (a >= (BASE << 9)) a -= (BASE << 9); \
+        if (a >= (BASE << 8)) a -= (BASE << 8); \
+        if (a >= (BASE << 7)) a -= (BASE << 7); \
+        if (a >= (BASE << 6)) a -= (BASE << 6); \
+        if (a >= (BASE << 5)) a -= (BASE << 5); \
+        if (a >= (BASE << 4)) a -= (BASE << 4); \
+        if (a >= (BASE << 3)) a -= (BASE << 3); \
+        if (a >= (BASE << 2)) a -= (BASE << 2); \
+        if (a >= (BASE << 1)) a -= (BASE << 1); \
+        if (a >= BASE) a -= BASE; \
+    } while (0)
+#  define MOD4(a) \
+    do { \
+        if (a >= (BASE << 4)) a -= (BASE << 4); \
+        if (a >= (BASE << 3)) a -= (BASE << 3); \
+        if (a >= (BASE << 2)) a -= (BASE << 2); \
+        if (a >= (BASE << 1)) a -= (BASE << 1); \
+        if (a >= BASE) a -= BASE; \
+    } while (0)
+#else
+#  define MOD(a) a %= BASE
+#  define MOD4(a) a %= BASE
+#endif
+
+/* ========================================================================= */
+uLong ZEXPORT adler32(adler, buf, len)
+    uLong adler;
+    const Bytef *buf;
+    uInt len;
+{
+    unsigned long sum2;
+    unsigned n;
+
+    /* split Adler-32 into component sums */
+    sum2 = (adler >> 16) & 0xffff;
+    adler &= 0xffff;
+
+    /* in case user likes doing a byte at a time, keep it fast */
+    if (len == 1) {
+        adler += buf[0];
+        if (adler >= BASE)
+            adler -= BASE;
+        sum2 += adler;
+        if (sum2 >= BASE)
+            sum2 -= BASE;
+        return adler | (sum2 << 16);
+    }
+
+    /* initial Adler-32 value (deferred check for len == 1 speed) */
+    if (buf == Z_NULL)
+        return 1L;
+
+    /* in case short lengths are provided, keep it somewhat fast */
+    if (len < 16) {
+        while (len--) {
+            adler += *buf++;
+            sum2 += adler;
+        }
+        if (adler >= BASE)
+            adler -= BASE;
+        MOD4(sum2);             /* only added so many BASE's */
+        return adler | (sum2 << 16);
+    }
+
+    /* do length NMAX blocks -- requires just one modulo operation */
+    while (len >= NMAX) {
+        len -= NMAX;
+        n = NMAX / 16;          /* NMAX is divisible by 16 */
+        do {
+            DO16(buf);          /* 16 sums unrolled */
+            buf += 16;
+        } while (--n);
+        MOD(adler);
+        MOD(sum2);
+    }
+
+    /* do remaining bytes (less than NMAX, still just one modulo) */
+    if (len) {                  /* avoid modulos if none remaining */
+        while (len >= 16) {
+            len -= 16;
+            DO16(buf);
+            buf += 16;
+        }
+        while (len--) {
+            adler += *buf++;
+            sum2 += adler;
+        }
+        MOD(adler);
+        MOD(sum2);
+    }
+
+    /* return recombined sums */
+    return adler | (sum2 << 16);
+}
+
+/* ========================================================================= */
+uLong ZEXPORT adler32_combine(adler1, adler2, len2)
+    uLong adler1;
+    uLong adler2;
+    z_off_t len2;
+{
+    unsigned long sum1;
+    unsigned long sum2;
+    unsigned rem;
+
+    /* the derivation of this formula is left as an exercise for the reader */
+    rem = (unsigned)(len2 % BASE);
+    sum1 = adler1 & 0xffff;
+    sum2 = rem * sum1;
+    MOD(sum2);
+    sum1 += (adler2 & 0xffff) + BASE - 1;
+    sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;
+    if (sum1 > BASE) sum1 -= BASE;
+    if (sum1 > BASE) sum1 -= BASE;
+    if (sum2 > (BASE << 1)) sum2 -= (BASE << 1);
+    if (sum2 > BASE) sum2 -= BASE;
+    return sum1 | (sum2 << 16);
+}
diff --git a/uts/common/zmod/crc32.c b/uts/common/zmod/crc32.c
new file mode 100644
index 000000000000..61ad581ef562
--- /dev/null
+++ b/uts/common/zmod/crc32.c
@@ -0,0 +1,428 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/* crc32.c -- compute the CRC-32 of a data stream
+ * Copyright (C) 1995-2005 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+ * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
+ * CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing
+ * tables for updating the shift register in one step with three exclusive-ors
+ * instead of four steps with four exclusive-ors.  This results in about a
+ * factor of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+  Note on the use of DYNAMIC_CRC_TABLE: there is no mutex or semaphore
+  protection on the static variables used to control the first-use generation
+  of the crc tables.  Therefore, if you #define DYNAMIC_CRC_TABLE, you should
+  first call get_crc_table() to initialize the tables before allowing more than
+  one thread to use crc32().
+ */
+
+#ifdef MAKECRCH
+#  include <stdio.h>
+#  ifndef DYNAMIC_CRC_TABLE
+#    define DYNAMIC_CRC_TABLE
+#  endif /* !DYNAMIC_CRC_TABLE */
+#endif /* MAKECRCH */
+
+#include "zutil.h"      /* for STDC and FAR definitions */
+
+#define local static
+
+/* Find a four-byte integer type for crc32_little() and crc32_big(). */
+#ifndef NOBYFOUR
+#  ifdef STDC           /* need ANSI C limits.h to determine sizes */
+#    include <limits.h>
+#    define BYFOUR
+#    if (UINT_MAX == 0xffffffffUL)
+       typedef unsigned int u4;
+#    else
+#      if (ULONG_MAX == 0xffffffffUL)
+         typedef unsigned long u4;
+#      else
+#        if (USHRT_MAX == 0xffffffffUL)
+           typedef unsigned short u4;
+#        else
+#          undef BYFOUR     /* can't find a four-byte integer type! */
+#        endif
+#      endif
+#    endif
+#  endif /* STDC */
+#endif /* !NOBYFOUR */
+
+/* Definitions for doing the crc four data bytes at a time. */
+#ifdef BYFOUR
+#  define REV(w) (((w)>>24)+(((w)>>8)&0xff00)+ \
+                (((w)&0xff00)<<8)+(((w)&0xff)<<24))
+   local unsigned long crc32_little OF((unsigned long,
+                        const unsigned char FAR *, unsigned));
+   local unsigned long crc32_big OF((unsigned long,
+                        const unsigned char FAR *, unsigned));
+#  define TBLS 8
+#else
+#  define TBLS 1
+#endif /* BYFOUR */
+
+/* Local functions for crc concatenation */
+local unsigned long gf2_matrix_times OF((unsigned long *mat,
+                                         unsigned long vec));
+local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat));
+
+#ifdef DYNAMIC_CRC_TABLE
+
+local volatile int crc_table_empty = 1;
+local unsigned long FAR crc_table[TBLS][256];
+local void make_crc_table OF((void));
+#ifdef MAKECRCH
+   local void write_table OF((FILE *, const unsigned long FAR *));
+#endif /* MAKECRCH */
+/*
+  Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
+  x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
+
+  Polynomials over GF(2) are represented in binary, one bit per coefficient,
+  with the lowest powers in the most significant bit.  Then adding polynomials
+  is just exclusive-or, and multiplying a polynomial by x is a right shift by
+  one.  If we call the above polynomial p, and represent a byte as the
+  polynomial q, also with the lowest power in the most significant bit (so the
+  byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
+  where a mod b means the remainder after dividing a by b.
+
+  This calculation is done using the shift-register method of multiplying and
+  taking the remainder.  The register is initialized to zero, and for each
+  incoming bit, x^32 is added mod p to the register if the bit is a one (where
+  x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
+  x (which is shifting right by one and adding x^32 mod p if the bit shifted
+  out is a one).  We start with the highest power (least significant bit) of
+  q and repeat for all eight bits of q.
+
+  The first table is simply the CRC of all possible eight bit values.  This is
+  all the information needed to generate CRCs on data a byte at a time for all
+  combinations of CRC register values and incoming bytes.  The remaining tables
+  allow for word-at-a-time CRC calculation for both big-endian and little-
+  endian machines, where a word is four bytes.
+*/
+local void make_crc_table()
+{
+    unsigned long c;
+    int n, k;
+    unsigned long poly;                 /* polynomial exclusive-or pattern */
+    /* terms of polynomial defining this crc (except x^32): */
+    static volatile int first = 1;      /* flag to limit concurrent making */
+    static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
+
+    /* See if another task is already doing this (not thread-safe, but better
+       than nothing -- significantly reduces duration of vulnerability in
+       case the advice about DYNAMIC_CRC_TABLE is ignored) */
+    if (first) {
+        first = 0;
+
+        /* make exclusive-or pattern from polynomial (0xedb88320UL) */
+        poly = 0UL;
+        for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++)
+            poly |= 1UL << (31 - p[n]);
+
+        /* generate a crc for every 8-bit value */
+        for (n = 0; n < 256; n++) {
+            c = (unsigned long)n;
+            for (k = 0; k < 8; k++)
+                c = c & 1 ? poly ^ (c >> 1) : c >> 1;
+            crc_table[0][n] = c;
+        }
+
+#ifdef BYFOUR
+        /* generate crc for each value followed by one, two, and three zeros,
+           and then the byte reversal of those as well as the first table */
+        for (n = 0; n < 256; n++) {
+            c = crc_table[0][n];
+            crc_table[4][n] = REV(c);
+            for (k = 1; k < 4; k++) {
+                c = crc_table[0][c & 0xff] ^ (c >> 8);
+                crc_table[k][n] = c;
+                crc_table[k + 4][n] = REV(c);
+            }
+        }
+#endif /* BYFOUR */
+
+        crc_table_empty = 0;
+    }
+    else {      /* not first */
+        /* wait for the other guy to finish (not efficient, but rare) */
+        while (crc_table_empty)
+            ;
+    }
+
+#ifdef MAKECRCH
+    /* write out CRC tables to crc32.h */
+    {
+        FILE *out;
+
+        out = fopen("crc32.h", "w");
+        if (out == NULL) return;
+        fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n");
+        fprintf(out, " * Generated automatically by crc32.c\n */\n\n");
+        fprintf(out, "local const unsigned long FAR ");
+        fprintf(out, "crc_table[TBLS][256] =\n{\n  {\n");
+        write_table(out, crc_table[0]);
+#  ifdef BYFOUR
+        fprintf(out, "#ifdef BYFOUR\n");
+        for (k = 1; k < 8; k++) {
+            fprintf(out, "  },\n  {\n");
+            write_table(out, crc_table[k]);
+        }
+        fprintf(out, "#endif\n");
+#  endif /* BYFOUR */
+        fprintf(out, "  }\n};\n");
+        fclose(out);
+    }
+#endif /* MAKECRCH */
+}
+
+#ifdef MAKECRCH
+local void write_table(out, table)
+    FILE *out;
+    const unsigned long FAR *table;
+{
+    int n;
+
+    for (n = 0; n < 256; n++)
+        fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : "    ", table[n],
+                n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
+}
+#endif /* MAKECRCH */
+
+#else /* !DYNAMIC_CRC_TABLE */
+/* ========================================================================
+ * Tables of CRC-32s of all single-byte values, made by make_crc_table().
+ */
+#include "crc32.h"
+#endif /* DYNAMIC_CRC_TABLE */
+
+/* =========================================================================
+ * This function can be used by asm versions of crc32()
+ */
+const unsigned long FAR * ZEXPORT get_crc_table()
+{
+#ifdef DYNAMIC_CRC_TABLE
+    if (crc_table_empty)
+        make_crc_table();
+#endif /* DYNAMIC_CRC_TABLE */
+    return (const unsigned long FAR *)crc_table;
+}
+
+/* ========================================================================= */
+#define DO1 crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)
+#define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
+
+/* ========================================================================= */
+unsigned long ZEXPORT crc32(crc, buf, len)
+    unsigned long crc;
+    const unsigned char FAR *buf;
+    unsigned len;
+{
+    if (buf == Z_NULL) return 0UL;
+
+#ifdef DYNAMIC_CRC_TABLE
+    if (crc_table_empty)
+        make_crc_table();
+#endif /* DYNAMIC_CRC_TABLE */
+
+#ifdef BYFOUR
+    if (sizeof(void *) == sizeof(ptrdiff_t)) {
+        u4 endian;
+
+        endian = 1;
+        if (*((unsigned char *)(&endian)))
+            return crc32_little(crc, buf, len);
+        else
+            return crc32_big(crc, buf, len);
+    }
+#endif /* BYFOUR */
+    crc = crc ^ 0xffffffffUL;
+    while (len >= 8) {
+        DO8;
+        len -= 8;
+    }
+    if (len) do {
+        DO1;
+    } while (--len);
+    return crc ^ 0xffffffffUL;
+}
+
+#ifdef BYFOUR
+
+/* ========================================================================= */
+#define DOLIT4 c ^= *buf4++; \
+        c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
+            crc_table[1][(c >> 16) & 0xff] ^ crc_table[0][c >> 24]
+#define DOLIT32 DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4
+
+/* ========================================================================= */
+local unsigned long crc32_little(crc, buf, len)
+    unsigned long crc;
+    const unsigned char FAR *buf;
+    unsigned len;
+{
+    register u4 c;
+    register const u4 FAR *buf4;
+
+    c = (u4)crc;
+    c = ~c;
+    while (len && ((ptrdiff_t)buf & 3)) {
+        c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
+        len--;
+    }
+
+    buf4 = (const u4 FAR *)(const void FAR *)buf;
+    while (len >= 32) {
+        DOLIT32;
+        len -= 32;
+    }
+    while (len >= 4) {
+        DOLIT4;
+        len -= 4;
+    }
+    buf = (const unsigned char FAR *)buf4;
+
+    if (len) do {
+        c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
+    } while (--len);
+    c = ~c;
+    return (unsigned long)c;
+}
+
+/* ========================================================================= */
+#define DOBIG4 c ^= *++buf4; \
+        c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
+            crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
+#define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4
+
+/* ========================================================================= */
+local unsigned long crc32_big(crc, buf, len)
+    unsigned long crc;
+    const unsigned char FAR *buf;
+    unsigned len;
+{
+    register u4 c;
+    register const u4 FAR *buf4;
+
+    c = REV((u4)crc);
+    c = ~c;
+    while (len && ((ptrdiff_t)buf & 3)) {
+        c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
+        len--;
+    }
+
+    buf4 = (const u4 FAR *)(const void FAR *)buf;
+    buf4--;
+    while (len >= 32) {
+        DOBIG32;
+        len -= 32;
+    }
+    while (len >= 4) {
+        DOBIG4;
+        len -= 4;
+    }
+    buf4++;
+    buf = (const unsigned char FAR *)buf4;
+
+    if (len) do {
+        c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
+    } while (--len);
+    c = ~c;
+    return (unsigned long)(REV(c));
+}
+
+#endif /* BYFOUR */
+
+#define GF2_DIM 32      /* dimension of GF(2) vectors (length of CRC) */
+
+/* ========================================================================= */
+local unsigned long gf2_matrix_times(mat, vec)
+    unsigned long *mat;
+    unsigned long vec;
+{
+    unsigned long sum;
+
+    sum = 0;
+    while (vec) {
+        if (vec & 1)
+            sum ^= *mat;
+        vec >>= 1;
+        mat++;
+    }
+    return sum;
+}
+
+/* ========================================================================= */
+local void gf2_matrix_square(square, mat)
+    unsigned long *square;
+    unsigned long *mat;
+{
+    int n;
+
+    for (n = 0; n < GF2_DIM; n++)
+        square[n] = gf2_matrix_times(mat, mat[n]);
+}
+
+/* ========================================================================= */
+uLong ZEXPORT crc32_combine(crc1, crc2, len2)
+    uLong crc1;
+    uLong crc2;
+    z_off_t len2;
+{
+    int n;
+    unsigned long row;
+    unsigned long even[GF2_DIM];    /* even-power-of-two zeros operator */
+    unsigned long odd[GF2_DIM];     /* odd-power-of-two zeros operator */
+
+    /* degenerate case */
+    if (len2 == 0)
+        return crc1;
+
+    /* put operator for one zero bit in odd */
+    odd[0] = 0xedb88320UL;          /* CRC-32 polynomial */
+    row = 1;
+    for (n = 1; n < GF2_DIM; n++) {
+        odd[n] = row;
+        row <<= 1;
+    }
+
+    /* put operator for two zero bits in even */
+    gf2_matrix_square(even, odd);
+
+    /* put operator for four zero bits in odd */
+    gf2_matrix_square(odd, even);
+
+    /* apply len2 zeros to crc1 (first square will put the operator for one
+       zero byte, eight zero bits, in even) */
+    do {
+        /* apply zeros operator for this bit of len2 */
+        gf2_matrix_square(even, odd);
+        if (len2 & 1)
+            crc1 = gf2_matrix_times(even, crc1);
+        len2 >>= 1;
+
+        /* if no more bits set, then done */
+        if (len2 == 0)
+            break;
+
+        /* another iteration of the loop with odd and even swapped */
+        gf2_matrix_square(odd, even);
+        if (len2 & 1)
+            crc1 = gf2_matrix_times(odd, crc1);
+        len2 >>= 1;
+
+        /* if no more bits set, then done */
+    } while (len2 != 0);
+
+    /* return combined crc */
+    crc1 ^= crc2;
+    return crc1;
+}
diff --git a/uts/common/zmod/crc32.h b/uts/common/zmod/crc32.h
new file mode 100644
index 000000000000..495c83e03179
--- /dev/null
+++ b/uts/common/zmod/crc32.h
@@ -0,0 +1,443 @@
+/* crc32.h -- tables for rapid CRC calculation
+ * Generated automatically by crc32.c
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+local const unsigned long FAR crc_table[TBLS][256] =
+{
+  {
+    0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
+    0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL,
+    0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL,
+    0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL,
+    0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL,
+    0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL,
+    0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL,
+    0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL,
+    0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL,
+    0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL,
+    0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL,
+    0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL,
+    0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL,
+    0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL,
+    0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL,
+    0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL,
+    0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL,
+    0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL,
+    0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL,
+    0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL,
+    0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL,
+    0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL,
+    0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL,
+    0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL,
+    0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL,
+    0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL,
+    0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL,
+    0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL,
+    0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL,
+    0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL,
+    0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL,
+    0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL,
+    0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL,
+    0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL,
+    0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL,
+    0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL,
+    0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL,
+    0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL,
+    0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL,
+    0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL,
+    0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL,
+    0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL,
+    0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL,
+    0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL,
+    0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL,
+    0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL,
+    0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL,
+    0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL,
+    0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL,
+    0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL,
+    0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL,
+    0x2d02ef8dUL
+#ifdef BYFOUR
+  },
+  {
+    0x00000000UL, 0x191b3141UL, 0x32366282UL, 0x2b2d53c3UL, 0x646cc504UL,
+    0x7d77f445UL, 0x565aa786UL, 0x4f4196c7UL, 0xc8d98a08UL, 0xd1c2bb49UL,
+    0xfaefe88aUL, 0xe3f4d9cbUL, 0xacb54f0cUL, 0xb5ae7e4dUL, 0x9e832d8eUL,
+    0x87981ccfUL, 0x4ac21251UL, 0x53d92310UL, 0x78f470d3UL, 0x61ef4192UL,
+    0x2eaed755UL, 0x37b5e614UL, 0x1c98b5d7UL, 0x05838496UL, 0x821b9859UL,
+    0x9b00a918UL, 0xb02dfadbUL, 0xa936cb9aUL, 0xe6775d5dUL, 0xff6c6c1cUL,
+    0xd4413fdfUL, 0xcd5a0e9eUL, 0x958424a2UL, 0x8c9f15e3UL, 0xa7b24620UL,
+    0xbea97761UL, 0xf1e8e1a6UL, 0xe8f3d0e7UL, 0xc3de8324UL, 0xdac5b265UL,
+    0x5d5daeaaUL, 0x44469febUL, 0x6f6bcc28UL, 0x7670fd69UL, 0x39316baeUL,
+    0x202a5aefUL, 0x0b07092cUL, 0x121c386dUL, 0xdf4636f3UL, 0xc65d07b2UL,
+    0xed705471UL, 0xf46b6530UL, 0xbb2af3f7UL, 0xa231c2b6UL, 0x891c9175UL,
+    0x9007a034UL, 0x179fbcfbUL, 0x0e848dbaUL, 0x25a9de79UL, 0x3cb2ef38UL,
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+    0xee530937UL, 0xf7483876UL, 0xb809aeb1UL, 0xa1129ff0UL, 0x8a3fcc33UL,
+    0x9324fd72UL
+  },
+  {
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+    0xb853f606UL, 0xb9919c31UL, 0xbcde8ab4UL, 0xbd1ce083UL, 0xbf5a5edaUL,
+    0xbe9834edUL
+  },
+  {
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+    0xe9dbf6c3UL, 0x516791a6UL, 0xccb0a91fUL, 0x740cce7aUL, 0x66b96194UL,
+    0xde0506f1UL
+  },
+  {
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+    0x021b685dUL, 0x942b6f2aUL, 0x37be0bb4UL, 0xa18e0cc3UL, 0x1bdf055aUL,
+    0x8def022dUL
+  },
+  {
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+    0x370953eeUL, 0x763848f7UL, 0xb1ae09b8UL, 0xf09f12a1UL, 0x33cc3f8aUL,
+    0x72fd2493UL
+  },
+  {
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+    0x13057799UL, 0x4abb319bUL, 0x7dd1f39aUL, 0x3035898dUL, 0x075f4b8cUL,
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+    0x413fb7a5UL, 0xc429f8a0UL, 0xf3433aa1UL, 0xaafd7ca3UL, 0x9d97bea2UL,
+    0xd073c4b5UL, 0xe71906b4UL, 0xbea740b6UL, 0x89cd82b7UL, 0x0cdbcdb2UL,
+    0x3bb10fb3UL, 0x620f49b1UL, 0x55658bb0UL, 0x6822d7bbUL, 0x5f4815baUL,
+    0x06f653b8UL, 0x319c91b9UL, 0xb48adebcUL, 0x83e01cbdUL, 0xda5e5abfUL,
+    0xed3498beUL
+  },
+  {
+    0x00000000UL, 0x6567bcb8UL, 0x8bc809aaUL, 0xeeafb512UL, 0x5797628fUL,
+    0x32f0de37UL, 0xdc5f6b25UL, 0xb938d79dUL, 0xef28b4c5UL, 0x8a4f087dUL,
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+    0xac20c6b0UL, 0xc9477a08UL, 0x3eaf32a0UL, 0x5bc88e18UL, 0xb5673b0aUL,
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+    0x18c0fc6dUL, 0x4ed09f35UL, 0x2bb7238dUL, 0xc518969fUL, 0xa07f2a27UL,
+    0x1947fdbaUL, 0x7c204102UL, 0x928ff410UL, 0xf7e848a8UL, 0x3d58149bUL,
+    0x583fa823UL, 0xb6901d31UL, 0xd3f7a189UL, 0x6acf7614UL, 0x0fa8caacUL,
+    0xe1077fbeUL, 0x8460c306UL, 0xd270a05eUL, 0xb7171ce6UL, 0x59b8a9f4UL,
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+    0xcdd91092UL, 0xa8beac2aUL, 0x46111938UL, 0x2376a580UL, 0x7566c6d8UL,
+    0x10017a60UL, 0xfeaecf72UL, 0x9bc973caUL, 0x22f1a457UL, 0x479618efUL,
+    0xa939adfdUL, 0xcc5e1145UL, 0x06ee4d76UL, 0x6389f1ceUL, 0x8d2644dcUL,
+    0xe841f864UL, 0x51792ff9UL, 0x341e9341UL, 0xdab12653UL, 0xbfd69aebUL,
+    0xe9c6f9b3UL, 0x8ca1450bUL, 0x620ef019UL, 0x07694ca1UL, 0xbe519b3cUL,
+    0xdb362784UL, 0x35999296UL, 0x50fe2e2eUL, 0x99b95426UL, 0xfcdee89eUL,
+    0x12715d8cUL, 0x7716e134UL, 0xce2e36a9UL, 0xab498a11UL, 0x45e63f03UL,
+    0x208183bbUL, 0x7691e0e3UL, 0x13f65c5bUL, 0xfd59e949UL, 0x983e55f1UL,
+    0x2106826cUL, 0x44613ed4UL, 0xaace8bc6UL, 0xcfa9377eUL, 0x38417fd6UL,
+    0x5d26c36eUL, 0xb389767cUL, 0xd6eecac4UL, 0x6fd61d59UL, 0x0ab1a1e1UL,
+    0xe41e14f3UL, 0x8179a84bUL, 0xd769cb13UL, 0xb20e77abUL, 0x5ca1c2b9UL,
+    0x39c67e01UL, 0x80fea99cUL, 0xe5991524UL, 0x0b36a036UL, 0x6e511c8eUL,
+    0xa7166686UL, 0xc271da3eUL, 0x2cde6f2cUL, 0x49b9d394UL, 0xf0810409UL,
+    0x95e6b8b1UL, 0x7b490da3UL, 0x1e2eb11bUL, 0x483ed243UL, 0x2d596efbUL,
+    0xc3f6dbe9UL, 0xa6916751UL, 0x1fa9b0ccUL, 0x7ace0c74UL, 0x9461b966UL,
+    0xf10605deUL
+#endif
+  }
+};
diff --git a/uts/common/zmod/deflate.c b/uts/common/zmod/deflate.c
new file mode 100644
index 000000000000..7847e40ba327
--- /dev/null
+++ b/uts/common/zmod/deflate.c
@@ -0,0 +1,1742 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/* deflate.c -- compress data using the deflation algorithm
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ *  ALGORITHM
+ *
+ *      The "deflation" process depends on being able to identify portions
+ *      of the input text which are identical to earlier input (within a
+ *      sliding window trailing behind the input currently being processed).
+ *
+ *      The most straightforward technique turns out to be the fastest for
+ *      most input files: try all possible matches and select the longest.
+ *      The key feature of this algorithm is that insertions into the string
+ *      dictionary are very simple and thus fast, and deletions are avoided
+ *      completely. Insertions are performed at each input character, whereas
+ *      string matches are performed only when the previous match ends. So it
+ *      is preferable to spend more time in matches to allow very fast string
+ *      insertions and avoid deletions. The matching algorithm for small
+ *      strings is inspired from that of Rabin & Karp. A brute force approach
+ *      is used to find longer strings when a small match has been found.
+ *      A similar algorithm is used in comic (by Jan-Mark Wams) and freeze
+ *      (by Leonid Broukhis).
+ *         A previous version of this file used a more sophisticated algorithm
+ *      (by Fiala and Greene) which is guaranteed to run in linear amortized
+ *      time, but has a larger average cost, uses more memory and is patented.
+ *      However the F&G algorithm may be faster for some highly redundant
+ *      files if the parameter max_chain_length (described below) is too large.
+ *
+ *  ACKNOWLEDGEMENTS
+ *
+ *      The idea of lazy evaluation of matches is due to Jan-Mark Wams, and
+ *      I found it in 'freeze' written by Leonid Broukhis.
+ *      Thanks to many people for bug reports and testing.
+ *
+ *  REFERENCES
+ *
+ *      Deutsch, L.P.,"DEFLATE Compressed Data Format Specification".
+ *      Available in http://www.ietf.org/rfc/rfc1951.txt
+ *
+ *      A description of the Rabin and Karp algorithm is given in the book
+ *         "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
+ *
+ *      Fiala,E.R., and Greene,D.H.
+ *         Data Compression with Finite Windows, Comm.ACM, 32,4 (1989) 490-595
+ *
+ */
+
+#include "deflate.h"
+
+static const char deflate_copyright[] =
+   " deflate 1.2.3 Copyright 1995-2005 Jean-loup Gailly ";
+/*
+  If you use the zlib library in a product, an acknowledgment is welcome
+  in the documentation of your product. If for some reason you cannot
+  include such an acknowledgment, I would appreciate that you keep this
+  copyright string in the executable of your product.
+ */
+
+/* ===========================================================================
+ *  Function prototypes.
+ */
+typedef enum {
+    need_more,      /* block not completed, need more input or more output */
+    block_done,     /* block flush performed */
+    finish_started, /* finish started, need only more output at next deflate */
+    finish_done     /* finish done, accept no more input or output */
+} block_state;
+
+typedef block_state (*compress_func) OF((deflate_state *s, int flush));
+/* Compression function. Returns the block state after the call. */
+
+local void fill_window    OF((deflate_state *s));
+local block_state deflate_stored OF((deflate_state *s, int flush));
+local block_state deflate_fast   OF((deflate_state *s, int flush));
+#ifndef FASTEST
+local block_state deflate_slow   OF((deflate_state *s, int flush));
+#endif
+local void lm_init        OF((deflate_state *s));
+local void putShortMSB    OF((deflate_state *s, uInt b));
+local void flush_pending  OF((z_streamp strm));
+local int read_buf        OF((z_streamp strm, Bytef *buf, unsigned size));
+#ifndef FASTEST
+#ifdef ASMV
+      void match_init OF((void)); /* asm code initialization */
+      uInt longest_match  OF((deflate_state *s, IPos cur_match));
+#else
+local uInt longest_match  OF((deflate_state *s, IPos cur_match));
+#endif
+#endif
+local uInt longest_match_fast OF((deflate_state *s, IPos cur_match));
+
+#ifdef DEBUG
+local  void check_match OF((deflate_state *s, IPos start, IPos match,
+                            int length));
+#endif
+
+/* ===========================================================================
+ * Local data
+ */
+
+#define NIL 0
+/* Tail of hash chains */
+
+#ifndef TOO_FAR
+#  define TOO_FAR 4096
+#endif
+/* Matches of length 3 are discarded if their distance exceeds TOO_FAR */
+
+#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
+/* Minimum amount of lookahead, except at the end of the input file.
+ * See deflate.c for comments about the MIN_MATCH+1.
+ */
+
+/* Values for max_lazy_match, good_match and max_chain_length, depending on
+ * the desired pack level (0..9). The values given below have been tuned to
+ * exclude worst case performance for pathological files. Better values may be
+ * found for specific files.
+ */
+typedef struct config_s {
+   ush good_length; /* reduce lazy search above this match length */
+   ush max_lazy;    /* do not perform lazy search above this match length */
+   ush nice_length; /* quit search above this match length */
+   ush max_chain;
+   compress_func func;
+} config;
+
+#ifdef FASTEST
+local const config configuration_table[2] = {
+/*      good lazy nice chain */
+/* 0 */ {0,    0,  0,    0, deflate_stored},  /* store only */
+/* 1 */ {4,    4,  8,    4, deflate_fast}}; /* max speed, no lazy matches */
+#else
+local const config configuration_table[10] = {
+/*      good lazy nice chain */
+/* 0 */ {0,    0,  0,    0, deflate_stored},  /* store only */
+/* 1 */ {4,    4,  8,    4, deflate_fast}, /* max speed, no lazy matches */
+/* 2 */ {4,    5, 16,    8, deflate_fast},
+/* 3 */ {4,    6, 32,   32, deflate_fast},
+
+/* 4 */ {4,    4, 16,   16, deflate_slow},  /* lazy matches */
+/* 5 */ {8,   16, 32,   32, deflate_slow},
+/* 6 */ {8,   16, 128, 128, deflate_slow},
+/* 7 */ {8,   32, 128, 256, deflate_slow},
+/* 8 */ {32, 128, 258, 1024, deflate_slow},
+/* 9 */ {32, 258, 258, 4096, deflate_slow}}; /* max compression */
+#endif
+
+/* Note: the deflate() code requires max_lazy >= MIN_MATCH and max_chain >= 4
+ * For deflate_fast() (levels <= 3) good is ignored and lazy has a different
+ * meaning.
+ */
+
+#define EQUAL 0
+/* result of memcmp for equal strings */
+
+#ifndef NO_DUMMY_DECL
+struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
+#endif
+
+/* ===========================================================================
+ * Update a hash value with the given input byte
+ * IN  assertion: all calls to to UPDATE_HASH are made with consecutive
+ *    input characters, so that a running hash key can be computed from the
+ *    previous key instead of complete recalculation each time.
+ */
+#define UPDATE_HASH(s,h,c) (h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask)
+
+
+/* ===========================================================================
+ * Insert string str in the dictionary and set match_head to the previous head
+ * of the hash chain (the most recent string with same hash key). Return
+ * the previous length of the hash chain.
+ * If this file is compiled with -DFASTEST, the compression level is forced
+ * to 1, and no hash chains are maintained.
+ * IN  assertion: all calls to to INSERT_STRING are made with consecutive
+ *    input characters and the first MIN_MATCH bytes of str are valid
+ *    (except for the last MIN_MATCH-1 bytes of the input file).
+ */
+#ifdef FASTEST
+#define INSERT_STRING(s, str, match_head) \
+   (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
+    match_head = s->head[s->ins_h], \
+    s->head[s->ins_h] = (Pos)(str))
+#else
+#define INSERT_STRING(s, str, match_head) \
+   (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
+    match_head = s->prev[(str) & s->w_mask] = s->head[s->ins_h], \
+    s->head[s->ins_h] = (Pos)(str))
+#endif
+
+/* ===========================================================================
+ * Initialize the hash table (avoiding 64K overflow for 16 bit systems).
+ * prev[] will be initialized on the fly.
+ */
+#define CLEAR_HASH(s) \
+    s->head[s->hash_size-1] = NIL; \
+    (void) zmemzero((Bytef *)s->head, \
+    (unsigned)(s->hash_size-1)*sizeof(*s->head));
+
+/* ========================================================================= */
+int ZEXPORT deflateInit_(strm, level, version, stream_size)
+    z_streamp strm;
+    int level;
+    const char *version;
+    int stream_size;
+{
+    return deflateInit2_(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL,
+                         Z_DEFAULT_STRATEGY, version, stream_size);
+    /* To do: ignore strm->next_in if we use it as window */
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
+                  version, stream_size)
+    z_streamp strm;
+    int  level;
+    int  method;
+    int  windowBits;
+    int  memLevel;
+    int  strategy;
+    const char *version;
+    int stream_size;
+{
+    deflate_state *s;
+    int wrap = 1;
+    static const char my_version[] = ZLIB_VERSION;
+
+    ushf *overlay;
+    /* We overlay pending_buf and d_buf+l_buf. This works since the average
+     * output size for (length,distance) codes is <= 24 bits.
+     */
+
+    if (version == Z_NULL || version[0] != my_version[0] ||
+        stream_size != sizeof(z_stream)) {
+        return Z_VERSION_ERROR;
+    }
+    if (strm == Z_NULL) return Z_STREAM_ERROR;
+
+    strm->msg = Z_NULL;
+    if (strm->zalloc == (alloc_func)0) {
+        strm->zalloc = zcalloc;
+        strm->opaque = (voidpf)0;
+    }
+    if (strm->zfree == (free_func)0) strm->zfree = zcfree;
+
+#ifdef FASTEST
+    if (level != 0) level = 1;
+#else
+    if (level == Z_DEFAULT_COMPRESSION) level = 6;
+#endif
+
+    if (windowBits < 0) { /* suppress zlib wrapper */
+        wrap = 0;
+        windowBits = -windowBits;
+    }
+#ifdef GZIP
+    else if (windowBits > 15) {
+        wrap = 2;       /* write gzip wrapper instead */
+        windowBits -= 16;
+    }
+#endif
+    if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
+        windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
+        strategy < 0 || strategy > Z_FIXED) {
+        return Z_STREAM_ERROR;
+    }
+    if (windowBits == 8) windowBits = 9;  /* until 256-byte window bug fixed */
+    s = (deflate_state *) ZALLOC(strm, 1, sizeof(deflate_state));
+    if (s == Z_NULL) return Z_MEM_ERROR;
+    strm->state = (struct internal_state FAR *)s;
+    s->strm = strm;
+
+    s->wrap = wrap;
+    s->gzhead = Z_NULL;
+    s->w_bits = windowBits;
+    s->w_size = 1 << s->w_bits;
+    s->w_mask = s->w_size - 1;
+
+    s->hash_bits = memLevel + 7;
+    s->hash_size = 1 << s->hash_bits;
+    s->hash_mask = s->hash_size - 1;
+    s->hash_shift =  ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH);
+
+    s->window = (Bytef *) ZALLOC(strm, s->w_size, 2*sizeof(Byte));
+    s->prev   = (Posf *)  ZALLOC(strm, s->w_size, sizeof(Pos));
+    s->head   = (Posf *)  ZALLOC(strm, s->hash_size, sizeof(Pos));
+
+    s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
+
+    overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
+    s->pending_buf = (uchf *) overlay;
+    s->pending_buf_size = (ulg)s->lit_bufsize * (sizeof(ush)+2L);
+
+    if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
+        s->pending_buf == Z_NULL) {
+        s->status = FINISH_STATE;
+        strm->msg = (char*)ERR_MSG(Z_MEM_ERROR);
+        (void) deflateEnd (strm);
+        return Z_MEM_ERROR;
+    }
+    s->d_buf = overlay + s->lit_bufsize/sizeof(ush);
+    s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;
+
+    s->level = level;
+    s->strategy = strategy;
+    s->method = (Byte)method;
+
+    return deflateReset(strm);
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
+    z_streamp strm;
+    const Bytef *dictionary;
+    uInt  dictLength;
+{
+    deflate_state *s;
+    uInt length = dictLength;
+    uInt n;
+    IPos hash_head = 0;
+
+    if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL ||
+        strm->state->wrap == 2 ||
+        (strm->state->wrap == 1 && strm->state->status != INIT_STATE))
+        return Z_STREAM_ERROR;
+
+    s = strm->state;
+    if (s->wrap)
+        strm->adler = adler32(strm->adler, dictionary, dictLength);
+
+    if (length < MIN_MATCH) return Z_OK;
+    if (length > MAX_DIST(s)) {
+        length = MAX_DIST(s);
+        dictionary += dictLength - length; /* use the tail of the dictionary */
+    }
+    (void) zmemcpy(s->window, dictionary, length);
+    s->strstart = length;
+    s->block_start = (long)length;
+
+    /* Insert all strings in the hash table (except for the last two bytes).
+     * s->lookahead stays null, so s->ins_h will be recomputed at the next
+     * call of fill_window.
+     */
+    s->ins_h = s->window[0];
+    UPDATE_HASH(s, s->ins_h, s->window[1]);
+    for (n = 0; n <= length - MIN_MATCH; n++) {
+        INSERT_STRING(s, n, hash_head);
+    }
+    if (hash_head) hash_head = 0;  /* to make compiler happy */
+    return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateReset (strm)
+    z_streamp strm;
+{
+    deflate_state *s;
+
+    if (strm == Z_NULL || strm->state == Z_NULL ||
+        strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0) {
+        return Z_STREAM_ERROR;
+    }
+
+    strm->total_in = strm->total_out = 0;
+    strm->msg = Z_NULL; /* use zfree if we ever allocate msg dynamically */
+    strm->data_type = Z_UNKNOWN;
+
+    s = (deflate_state *)strm->state;
+    s->pending = 0;
+    s->pending_out = s->pending_buf;
+
+    if (s->wrap < 0) {
+        s->wrap = -s->wrap; /* was made negative by deflate(..., Z_FINISH); */
+    }
+    s->status = s->wrap ? INIT_STATE : BUSY_STATE;
+    strm->adler =
+#ifdef GZIP
+        s->wrap == 2 ? crc32(0L, Z_NULL, 0) :
+#endif
+        adler32(0L, Z_NULL, 0);
+    s->last_flush = Z_NO_FLUSH;
+
+    _tr_init(s);
+    lm_init(s);
+
+    return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateSetHeader (strm, head)
+    z_streamp strm;
+    gz_headerp head;
+{
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (strm->state->wrap != 2) return Z_STREAM_ERROR;
+    strm->state->gzhead = head;
+    return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflatePrime (strm, bits, value)
+    z_streamp strm;
+    int bits;
+    int value;
+{
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    strm->state->bi_valid = bits;
+    strm->state->bi_buf = (ush)(value & ((1 << bits) - 1));
+    return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateParams(strm, level, strategy)
+    z_streamp strm;
+    int level;
+    int strategy;
+{
+    deflate_state *s;
+    compress_func func;
+    int err = Z_OK;
+
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    s = strm->state;
+
+#ifdef FASTEST
+    if (level != 0) level = 1;
+#else
+    if (level == Z_DEFAULT_COMPRESSION) level = 6;
+#endif
+    if (level < 0 || level > 9 || strategy < 0 || strategy > Z_FIXED) {
+        return Z_STREAM_ERROR;
+    }
+    func = configuration_table[s->level].func;
+
+    if (func != configuration_table[level].func && strm->total_in != 0) {
+        /* Flush the last buffer: */
+        err = deflate(strm, Z_PARTIAL_FLUSH);
+    }
+    if (s->level != level) {
+        s->level = level;
+        s->max_lazy_match   = configuration_table[level].max_lazy;
+        s->good_match       = configuration_table[level].good_length;
+        s->nice_match       = configuration_table[level].nice_length;
+        s->max_chain_length = configuration_table[level].max_chain;
+    }
+    s->strategy = strategy;
+    return err;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain)
+    z_streamp strm;
+    int good_length;
+    int max_lazy;
+    int nice_length;
+    int max_chain;
+{
+    deflate_state *s;
+
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    s = strm->state;
+    s->good_match = good_length;
+    s->max_lazy_match = max_lazy;
+    s->nice_match = nice_length;
+    s->max_chain_length = max_chain;
+    return Z_OK;
+}
+
+/* =========================================================================
+ * For the default windowBits of 15 and memLevel of 8, this function returns
+ * a close to exact, as well as small, upper bound on the compressed size.
+ * They are coded as constants here for a reason--if the #define's are
+ * changed, then this function needs to be changed as well.  The return
+ * value for 15 and 8 only works for those exact settings.
+ *
+ * For any setting other than those defaults for windowBits and memLevel,
+ * the value returned is a conservative worst case for the maximum expansion
+ * resulting from using fixed blocks instead of stored blocks, which deflate
+ * can emit on compressed data for some combinations of the parameters.
+ *
+ * This function could be more sophisticated to provide closer upper bounds
+ * for every combination of windowBits and memLevel, as well as wrap.
+ * But even the conservative upper bound of about 14% expansion does not
+ * seem onerous for output buffer allocation.
+ */
+uLong ZEXPORT deflateBound(strm, sourceLen)
+    z_streamp strm;
+    uLong sourceLen;
+{
+    deflate_state *s;
+    uLong destLen;
+
+    /* conservative upper bound */
+    destLen = sourceLen +
+              ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 11;
+
+    /* if can't get parameters, return conservative bound */
+    if (strm == Z_NULL || strm->state == Z_NULL)
+        return destLen;
+
+    /* if not default parameters, return conservative bound */
+    s = strm->state;
+    if (s->w_bits != 15 || s->hash_bits != 8 + 7)
+        return destLen;
+
+    /* default settings: return tight bound for that case */
+    return compressBound(sourceLen);
+}
+
+/* =========================================================================
+ * Put a short in the pending buffer. The 16-bit value is put in MSB order.
+ * IN assertion: the stream state is correct and there is enough room in
+ * pending_buf.
+ */
+local void putShortMSB (s, b)
+    deflate_state *s;
+    uInt b;
+{
+    put_byte(s, (Byte)(b >> 8));
+    put_byte(s, (Byte)(b & 0xff));
+}
+
+/* =========================================================================
+ * Flush as much pending output as possible. All deflate() output goes
+ * through this function so some applications may wish to modify it
+ * to avoid allocating a large strm->next_out buffer and copying into it.
+ * (See also read_buf()).
+ */
+local void flush_pending(strm)
+    z_streamp strm;
+{
+    unsigned len = strm->state->pending;
+
+    if (len > strm->avail_out) len = strm->avail_out;
+    if (len == 0) return;
+
+    zmemcpy(strm->next_out, strm->state->pending_out, len);
+    strm->next_out  += len;
+    strm->state->pending_out  += len;
+    strm->total_out += len;
+    strm->avail_out  -= len;
+    strm->state->pending -= len;
+    if (strm->state->pending == 0) {
+        strm->state->pending_out = strm->state->pending_buf;
+    }
+}
+
+/* ========================================================================= */
+int ZEXPORT deflate (strm, flush)
+    z_streamp strm;
+    int flush;
+{
+    int old_flush; /* value of flush param for previous deflate call */
+    deflate_state *s;
+
+    if (strm == Z_NULL || strm->state == Z_NULL ||
+        flush > Z_FINISH || flush < 0) {
+        return Z_STREAM_ERROR;
+    }
+    s = strm->state;
+
+    if (strm->next_out == Z_NULL ||
+        (strm->next_in == Z_NULL && strm->avail_in != 0) ||
+        (s->status == FINISH_STATE && flush != Z_FINISH)) {
+        ERR_RETURN(strm, Z_STREAM_ERROR);
+    }
+    if (strm->avail_out == 0) ERR_RETURN(strm, Z_BUF_ERROR);
+
+    s->strm = strm; /* just in case */
+    old_flush = s->last_flush;
+    s->last_flush = flush;
+
+    /* Write the header */
+    if (s->status == INIT_STATE) {
+#ifdef GZIP
+        if (s->wrap == 2) {
+            strm->adler = crc32(0L, Z_NULL, 0);
+            put_byte(s, 31);
+            put_byte(s, 139);
+            put_byte(s, 8);
+            if (s->gzhead == NULL) {
+                put_byte(s, 0);
+                put_byte(s, 0);
+                put_byte(s, 0);
+                put_byte(s, 0);
+                put_byte(s, 0);
+                put_byte(s, s->level == 9 ? 2 :
+                            (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
+                             4 : 0));
+                put_byte(s, OS_CODE);
+                s->status = BUSY_STATE;
+            }
+            else {
+                put_byte(s, (s->gzhead->text ? 1 : 0) +
+                            (s->gzhead->hcrc ? 2 : 0) +
+                            (s->gzhead->extra == Z_NULL ? 0 : 4) +
+                            (s->gzhead->name == Z_NULL ? 0 : 8) +
+                            (s->gzhead->comment == Z_NULL ? 0 : 16)
+                        );
+                put_byte(s, (Byte)(s->gzhead->time & 0xff));
+                put_byte(s, (Byte)((s->gzhead->time >> 8) & 0xff));
+                put_byte(s, (Byte)((s->gzhead->time >> 16) & 0xff));
+                put_byte(s, (Byte)((s->gzhead->time >> 24) & 0xff));
+                put_byte(s, s->level == 9 ? 2 :
+                            (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
+                             4 : 0));
+                put_byte(s, s->gzhead->os & 0xff);
+                if (s->gzhead->extra != NULL) {
+                    put_byte(s, s->gzhead->extra_len & 0xff);
+                    put_byte(s, (s->gzhead->extra_len >> 8) & 0xff);
+                }
+                if (s->gzhead->hcrc)
+                    strm->adler = crc32(strm->adler, s->pending_buf,
+                                        s->pending);
+                s->gzindex = 0;
+                s->status = EXTRA_STATE;
+            }
+        }
+        else
+#endif
+        {
+            uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;
+            uInt level_flags;
+
+            if (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2)
+                level_flags = 0;
+            else if (s->level < 6)
+                level_flags = 1;
+            else if (s->level == 6)
+                level_flags = 2;
+            else
+                level_flags = 3;
+            header |= (level_flags << 6);
+            if (s->strstart != 0) header |= PRESET_DICT;
+            header += 31 - (header % 31);
+
+            s->status = BUSY_STATE;
+            putShortMSB(s, header);
+
+            /* Save the adler32 of the preset dictionary: */
+            if (s->strstart != 0) {
+                putShortMSB(s, (uInt)(strm->adler >> 16));
+                putShortMSB(s, (uInt)(strm->adler & 0xffff));
+            }
+            strm->adler = adler32(0L, Z_NULL, 0);
+        }
+    }
+#ifdef GZIP
+    if (s->status == EXTRA_STATE) {
+        if (s->gzhead->extra != NULL) {
+            uInt beg = s->pending;  /* start of bytes to update crc */
+
+            while (s->gzindex < (s->gzhead->extra_len & 0xffff)) {
+                if (s->pending == s->pending_buf_size) {
+                    if (s->gzhead->hcrc && s->pending > beg)
+                        strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                            s->pending - beg);
+                    flush_pending(strm);
+                    beg = s->pending;
+                    if (s->pending == s->pending_buf_size)
+                        break;
+                }
+                put_byte(s, s->gzhead->extra[s->gzindex]);
+                s->gzindex++;
+            }
+            if (s->gzhead->hcrc && s->pending > beg)
+                strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                    s->pending - beg);
+            if (s->gzindex == s->gzhead->extra_len) {
+                s->gzindex = 0;
+                s->status = NAME_STATE;
+            }
+        }
+        else
+            s->status = NAME_STATE;
+    }
+    if (s->status == NAME_STATE) {
+        if (s->gzhead->name != NULL) {
+            uInt beg = s->pending;  /* start of bytes to update crc */
+            int val;
+
+            do {
+                if (s->pending == s->pending_buf_size) {
+                    if (s->gzhead->hcrc && s->pending > beg)
+                        strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                            s->pending - beg);
+                    flush_pending(strm);
+                    beg = s->pending;
+                    if (s->pending == s->pending_buf_size) {
+                        val = 1;
+                        break;
+                    }
+                }
+                val = s->gzhead->name[s->gzindex++];
+                put_byte(s, val);
+            } while (val != 0);
+            if (s->gzhead->hcrc && s->pending > beg)
+                strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                    s->pending - beg);
+            if (val == 0) {
+                s->gzindex = 0;
+                s->status = COMMENT_STATE;
+            }
+        }
+        else
+            s->status = COMMENT_STATE;
+    }
+    if (s->status == COMMENT_STATE) {
+        if (s->gzhead->comment != NULL) {
+            uInt beg = s->pending;  /* start of bytes to update crc */
+            int val;
+
+            do {
+                if (s->pending == s->pending_buf_size) {
+                    if (s->gzhead->hcrc && s->pending > beg)
+                        strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                            s->pending - beg);
+                    flush_pending(strm);
+                    beg = s->pending;
+                    if (s->pending == s->pending_buf_size) {
+                        val = 1;
+                        break;
+                    }
+                }
+                val = s->gzhead->comment[s->gzindex++];
+                put_byte(s, val);
+            } while (val != 0);
+            if (s->gzhead->hcrc && s->pending > beg)
+                strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                    s->pending - beg);
+            if (val == 0)
+                s->status = HCRC_STATE;
+        }
+        else
+            s->status = HCRC_STATE;
+    }
+    if (s->status == HCRC_STATE) {
+        if (s->gzhead->hcrc) {
+            if (s->pending + 2 > s->pending_buf_size)
+                flush_pending(strm);
+            if (s->pending + 2 <= s->pending_buf_size) {
+                put_byte(s, (Byte)(strm->adler & 0xff));
+                put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
+                strm->adler = crc32(0L, Z_NULL, 0);
+                s->status = BUSY_STATE;
+            }
+        }
+        else
+            s->status = BUSY_STATE;
+    }
+#endif
+
+    /* Flush as much pending output as possible */
+    if (s->pending != 0) {
+        flush_pending(strm);
+        if (strm->avail_out == 0) {
+            /* Since avail_out is 0, deflate will be called again with
+             * more output space, but possibly with both pending and
+             * avail_in equal to zero. There won't be anything to do,
+             * but this is not an error situation so make sure we
+             * return OK instead of BUF_ERROR at next call of deflate:
+             */
+            s->last_flush = -1;
+            return Z_OK;
+        }
+
+    /* Make sure there is something to do and avoid duplicate consecutive
+     * flushes. For repeated and useless calls with Z_FINISH, we keep
+     * returning Z_STREAM_END instead of Z_BUF_ERROR.
+     */
+    } else if (strm->avail_in == 0 && flush <= old_flush &&
+               flush != Z_FINISH) {
+        ERR_RETURN(strm, Z_BUF_ERROR);
+    }
+
+    /* User must not provide more input after the first FINISH: */
+    if (s->status == FINISH_STATE && strm->avail_in != 0) {
+        ERR_RETURN(strm, Z_BUF_ERROR);
+    }
+
+    /* Start a new block or continue the current one.
+     */
+    if (strm->avail_in != 0 || s->lookahead != 0 ||
+        (flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {
+        block_state bstate;
+
+        bstate = (*(configuration_table[s->level].func))(s, flush);
+
+        if (bstate == finish_started || bstate == finish_done) {
+            s->status = FINISH_STATE;
+        }
+        if (bstate == need_more || bstate == finish_started) {
+            if (strm->avail_out == 0) {
+                s->last_flush = -1; /* avoid BUF_ERROR next call, see above */
+            }
+            return Z_OK;
+            /* If flush != Z_NO_FLUSH && avail_out == 0, the next call
+             * of deflate should use the same flush parameter to make sure
+             * that the flush is complete. So we don't have to output an
+             * empty block here, this will be done at next call. This also
+             * ensures that for a very small output buffer, we emit at most
+             * one empty block.
+             */
+        }
+        if (bstate == block_done) {
+            if (flush == Z_PARTIAL_FLUSH) {
+                _tr_align(s);
+            } else { /* FULL_FLUSH or SYNC_FLUSH */
+                _tr_stored_block(s, (char*)0, 0L, 0);
+                /* For a full flush, this empty block will be recognized
+                 * as a special marker by inflate_sync().
+                 */
+                if (flush == Z_FULL_FLUSH) {
+                    CLEAR_HASH(s);             /* forget history */
+                }
+            }
+            flush_pending(strm);
+            if (strm->avail_out == 0) {
+              s->last_flush = -1; /* avoid BUF_ERROR at next call, see above */
+              return Z_OK;
+            }
+        }
+    }
+    Assert(strm->avail_out > 0, "bug2");
+
+    if (flush != Z_FINISH) return Z_OK;
+    if (s->wrap <= 0) return Z_STREAM_END;
+
+    /* Write the trailer */
+#ifdef GZIP
+    if (s->wrap == 2) {
+        put_byte(s, (Byte)(strm->adler & 0xff));
+        put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
+        put_byte(s, (Byte)((strm->adler >> 16) & 0xff));
+        put_byte(s, (Byte)((strm->adler >> 24) & 0xff));
+        put_byte(s, (Byte)(strm->total_in & 0xff));
+        put_byte(s, (Byte)((strm->total_in >> 8) & 0xff));
+        put_byte(s, (Byte)((strm->total_in >> 16) & 0xff));
+        put_byte(s, (Byte)((strm->total_in >> 24) & 0xff));
+    }
+    else
+#endif
+    {
+        putShortMSB(s, (uInt)(strm->adler >> 16));
+        putShortMSB(s, (uInt)(strm->adler & 0xffff));
+    }
+    flush_pending(strm);
+    /* If avail_out is zero, the application will call deflate again
+     * to flush the rest.
+     */
+    if (s->wrap > 0) s->wrap = -s->wrap; /* write the trailer only once! */
+    return s->pending != 0 ? Z_OK : Z_STREAM_END;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateEnd (strm)
+    z_streamp strm;
+{
+    int status;
+
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+
+    status = strm->state->status;
+    if (status != INIT_STATE &&
+        status != EXTRA_STATE &&
+        status != NAME_STATE &&
+        status != COMMENT_STATE &&
+        status != HCRC_STATE &&
+        status != BUSY_STATE &&
+        status != FINISH_STATE) {
+      return Z_STREAM_ERROR;
+    }
+
+    /* Deallocate in reverse order of allocations: */
+    TRY_FREE(strm, strm->state->pending_buf);
+    TRY_FREE(strm, strm->state->head);
+    TRY_FREE(strm, strm->state->prev);
+    TRY_FREE(strm, strm->state->window);
+
+    ZFREE(strm, strm->state);
+    strm->state = Z_NULL;
+
+    return status == BUSY_STATE ? Z_DATA_ERROR : Z_OK;
+}
+
+/* =========================================================================
+ * Copy the source state to the destination state.
+ * To simplify the source, this is not supported for 16-bit MSDOS (which
+ * doesn't have enough memory anyway to duplicate compression states).
+ */
+int ZEXPORT deflateCopy (dest, source)
+    z_streamp dest;
+    z_streamp source;
+{
+#ifdef MAXSEG_64K
+    return Z_STREAM_ERROR;
+#else
+    deflate_state *ds;
+    deflate_state *ss;
+    ushf *overlay;
+
+
+    if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {
+        return Z_STREAM_ERROR;
+    }
+
+    ss = source->state;
+
+    zmemcpy(dest, source, sizeof(z_stream));
+
+    ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));
+    if (ds == Z_NULL) return Z_MEM_ERROR;
+    dest->state = (struct internal_state FAR *) ds;
+    zmemcpy(ds, ss, sizeof(deflate_state));
+    ds->strm = dest;
+
+    ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
+    ds->prev   = (Posf *)  ZALLOC(dest, ds->w_size, sizeof(Pos));
+    ds->head   = (Posf *)  ZALLOC(dest, ds->hash_size, sizeof(Pos));
+    overlay = (ushf *) ZALLOC(dest, ds->lit_bufsize, sizeof(ush)+2);
+    ds->pending_buf = (uchf *) overlay;
+
+    if (ds->window == Z_NULL || ds->prev == Z_NULL || ds->head == Z_NULL ||
+        ds->pending_buf == Z_NULL) {
+        deflateEnd (dest);
+        return Z_MEM_ERROR;
+    }
+    /* following zmemcpy do not work for 16-bit MSDOS */
+    zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte));
+    zmemcpy(ds->prev, ss->prev, ds->w_size * sizeof(Pos));
+    zmemcpy(ds->head, ss->head, ds->hash_size * sizeof(Pos));
+    zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);
+
+    ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
+    ds->d_buf = overlay + ds->lit_bufsize/sizeof(ush);
+    ds->l_buf = ds->pending_buf + (1+sizeof(ush))*ds->lit_bufsize;
+
+    ds->l_desc.dyn_tree = ds->dyn_ltree;
+    ds->d_desc.dyn_tree = ds->dyn_dtree;
+    ds->bl_desc.dyn_tree = ds->bl_tree;
+
+    return Z_OK;
+#endif /* MAXSEG_64K */
+}
+
+/* ===========================================================================
+ * Read a new buffer from the current input stream, update the adler32
+ * and total number of bytes read.  All deflate() input goes through
+ * this function so some applications may wish to modify it to avoid
+ * allocating a large strm->next_in buffer and copying from it.
+ * (See also flush_pending()).
+ */
+local int read_buf(strm, buf, size)
+    z_streamp strm;
+    Bytef *buf;
+    unsigned size;
+{
+    unsigned len = strm->avail_in;
+
+    if (len > size) len = size;
+    if (len == 0) return 0;
+
+    strm->avail_in  -= len;
+
+    if (strm->state->wrap == 1) {
+        strm->adler = adler32(strm->adler, strm->next_in, len);
+    }
+#ifdef GZIP
+    else if (strm->state->wrap == 2) {
+        strm->adler = crc32(strm->adler, strm->next_in, len);
+    }
+#endif
+    zmemcpy(buf, strm->next_in, len);
+    strm->next_in  += len;
+    strm->total_in += len;
+
+    return (int)len;
+}
+
+/* ===========================================================================
+ * Initialize the "longest match" routines for a new zlib stream
+ */
+local void lm_init (s)
+    deflate_state *s;
+{
+    s->window_size = (ulg)2L*s->w_size;
+
+    CLEAR_HASH(s);
+
+    /* Set the default configuration parameters:
+     */
+    s->max_lazy_match   = configuration_table[s->level].max_lazy;
+    s->good_match       = configuration_table[s->level].good_length;
+    s->nice_match       = configuration_table[s->level].nice_length;
+    s->max_chain_length = configuration_table[s->level].max_chain;
+
+    s->strstart = 0;
+    s->block_start = 0L;
+    s->lookahead = 0;
+    s->match_length = s->prev_length = MIN_MATCH-1;
+    s->match_available = 0;
+    s->ins_h = 0;
+#ifndef FASTEST
+#ifdef ASMV
+    match_init(); /* initialize the asm code */
+#endif
+#endif
+}
+
+#ifndef FASTEST
+/* ===========================================================================
+ * Set match_start to the longest match starting at the given string and
+ * return its length. Matches shorter or equal to prev_length are discarded,
+ * in which case the result is equal to prev_length and match_start is
+ * garbage.
+ * IN assertions: cur_match is the head of the hash chain for the current
+ *   string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
+ * OUT assertion: the match length is not greater than s->lookahead.
+ */
+#ifndef ASMV
+/* For 80x86 and 680x0, an optimized version will be provided in match.asm or
+ * match.S. The code will be functionally equivalent.
+ */
+local uInt longest_match(s, cur_match)
+    deflate_state *s;
+    IPos cur_match;                             /* current match */
+{
+    unsigned chain_length = s->max_chain_length;/* max hash chain length */
+    register Bytef *scan = s->window + s->strstart; /* current string */
+    register Bytef *match;                       /* matched string */
+    register int len;                           /* length of current match */
+    int best_len = s->prev_length;              /* best match length so far */
+    int nice_match = s->nice_match;             /* stop if match long enough */
+    IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
+        s->strstart - (IPos)MAX_DIST(s) : NIL;
+    /* Stop when cur_match becomes <= limit. To simplify the code,
+     * we prevent matches with the string of window index 0.
+     */
+    Posf *prev = s->prev;
+    uInt wmask = s->w_mask;
+
+#ifdef UNALIGNED_OK
+    /* Compare two bytes at a time. Note: this is not always beneficial.
+     * Try with and without -DUNALIGNED_OK to check.
+     */
+    register Bytef *strend = s->window + s->strstart + MAX_MATCH - 1;
+    register ush scan_start = *(ushf*)scan;
+    register ush scan_end   = *(ushf*)(scan+best_len-1);
+#else
+    register Bytef *strend = s->window + s->strstart + MAX_MATCH;
+    register Byte scan_end1  = scan[best_len-1];
+    register Byte scan_end   = scan[best_len];
+#endif
+
+    /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
+     * It is easy to get rid of this optimization if necessary.
+     */
+    Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
+
+    /* Do not waste too much time if we already have a good match: */
+    if (s->prev_length >= s->good_match) {
+        chain_length >>= 2;
+    }
+    /* Do not look for matches beyond the end of the input. This is necessary
+     * to make deflate deterministic.
+     */
+    if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
+
+    Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
+
+    do {
+        Assert(cur_match < s->strstart, "no future");
+        match = s->window + cur_match;
+
+        /* Skip to next match if the match length cannot increase
+         * or if the match length is less than 2.  Note that the checks below
+         * for insufficient lookahead only occur occasionally for performance
+         * reasons.  Therefore uninitialized memory will be accessed, and
+         * conditional jumps will be made that depend on those values.
+         * However the length of the match is limited to the lookahead, so
+         * the output of deflate is not affected by the uninitialized values.
+         */
+#if (defined(UNALIGNED_OK) && MAX_MATCH == 258)
+        /* This code assumes sizeof(unsigned short) == 2. Do not use
+         * UNALIGNED_OK if your compiler uses a different size.
+         */
+        if (*(ushf*)(match+best_len-1) != scan_end ||
+            *(ushf*)match != scan_start) continue;
+
+        /* It is not necessary to compare scan[2] and match[2] since they are
+         * always equal when the other bytes match, given that the hash keys
+         * are equal and that HASH_BITS >= 8. Compare 2 bytes at a time at
+         * strstart+3, +5, ... up to strstart+257. We check for insufficient
+         * lookahead only every 4th comparison; the 128th check will be made
+         * at strstart+257. If MAX_MATCH-2 is not a multiple of 8, it is
+         * necessary to put more guard bytes at the end of the window, or
+         * to check more often for insufficient lookahead.
+         */
+        Assert(scan[2] == match[2], "scan[2]?");
+        scan++, match++;
+        do {
+        } while (*(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+                 *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+                 *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+                 *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+                 scan < strend);
+        /* The funny "do {}" generates better code on most compilers */
+
+        /* Here, scan <= window+strstart+257 */
+        Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+        if (*scan == *match) scan++;
+
+        len = (MAX_MATCH - 1) - (int)(strend-scan);
+        scan = strend - (MAX_MATCH-1);
+
+#else /* UNALIGNED_OK */
+
+        if (match[best_len]   != scan_end  ||
+            match[best_len-1] != scan_end1 ||
+            *match            != *scan     ||
+            *++match          != scan[1])      continue;
+
+        /* The check at best_len-1 can be removed because it will be made
+         * again later. (This heuristic is not always a win.)
+         * It is not necessary to compare scan[2] and match[2] since they
+         * are always equal when the other bytes match, given that
+         * the hash keys are equal and that HASH_BITS >= 8.
+         */
+        scan += 2, match++;
+        Assert(*scan == *match, "match[2]?");
+
+        /* We check for insufficient lookahead only every 8th comparison;
+         * the 256th check will be made at strstart+258.
+         */
+        do {
+        } while (*++scan == *++match && *++scan == *++match &&
+                 *++scan == *++match && *++scan == *++match &&
+                 *++scan == *++match && *++scan == *++match &&
+                 *++scan == *++match && *++scan == *++match &&
+                 scan < strend);
+
+        Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+
+        len = MAX_MATCH - (int)(strend - scan);
+        scan = strend - MAX_MATCH;
+
+#endif /* UNALIGNED_OK */
+
+        if (len > best_len) {
+            s->match_start = cur_match;
+            best_len = len;
+            if (len >= nice_match) break;
+#ifdef UNALIGNED_OK
+            scan_end = *(ushf*)(scan+best_len-1);
+#else
+            scan_end1  = scan[best_len-1];
+            scan_end   = scan[best_len];
+#endif
+        }
+    } while ((cur_match = prev[cur_match & wmask]) > limit
+             && --chain_length != 0);
+
+    if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
+    return s->lookahead;
+}
+#endif /* ASMV */
+#endif /* FASTEST */
+
+/* ---------------------------------------------------------------------------
+ * Optimized version for level == 1 or strategy == Z_RLE only
+ */
+local uInt longest_match_fast(s, cur_match)
+    deflate_state *s;
+    IPos cur_match;                             /* current match */
+{
+    register Bytef *scan = s->window + s->strstart; /* current string */
+    register Bytef *match;                       /* matched string */
+    register int len;                           /* length of current match */
+    register Bytef *strend = s->window + s->strstart + MAX_MATCH;
+
+    /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
+     * It is easy to get rid of this optimization if necessary.
+     */
+    Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
+
+    Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
+
+    Assert(cur_match < s->strstart, "no future");
+
+    match = s->window + cur_match;
+
+    /* Return failure if the match length is less than 2:
+     */
+    if (match[0] != scan[0] || match[1] != scan[1]) return MIN_MATCH-1;
+
+    /* The check at best_len-1 can be removed because it will be made
+     * again later. (This heuristic is not always a win.)
+     * It is not necessary to compare scan[2] and match[2] since they
+     * are always equal when the other bytes match, given that
+     * the hash keys are equal and that HASH_BITS >= 8.
+     */
+    scan += 2, match += 2;
+    Assert(*scan == *match, "match[2]?");
+
+    /* We check for insufficient lookahead only every 8th comparison;
+     * the 256th check will be made at strstart+258.
+     */
+    do {
+    } while (*++scan == *++match && *++scan == *++match &&
+             *++scan == *++match && *++scan == *++match &&
+             *++scan == *++match && *++scan == *++match &&
+             *++scan == *++match && *++scan == *++match &&
+             scan < strend);
+
+    Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+
+    len = MAX_MATCH - (int)(strend - scan);
+
+    if (len < MIN_MATCH) return MIN_MATCH - 1;
+
+    s->match_start = cur_match;
+    return (uInt)len <= s->lookahead ? (uInt)len : s->lookahead;
+}
+
+#ifdef DEBUG
+/* ===========================================================================
+ * Check that the match at match_start is indeed a match.
+ */
+local void check_match(s, start, match, length)
+    deflate_state *s;
+    IPos start, match;
+    int length;
+{
+    /* check that the match is indeed a match */
+    if (zmemcmp(s->window + match,
+                s->window + start, length) != EQUAL) {
+        fprintf(stderr, " start %u, match %u, length %d\n",
+                start, match, length);
+        do {
+            fprintf(stderr, "%c%c", s->window[match++], s->window[start++]);
+        } while (--length != 0);
+        z_error("invalid match");
+    }
+    if (z_verbose > 1) {
+        fprintf(stderr,"\\[%d,%d]", start-match, length);
+        do { putc(s->window[start++], stderr); } while (--length != 0);
+    }
+}
+#else
+#  define check_match(s, start, match, length)
+#endif /* DEBUG */
+
+/* ===========================================================================
+ * Fill the window when the lookahead becomes insufficient.
+ * Updates strstart and lookahead.
+ *
+ * IN assertion: lookahead < MIN_LOOKAHEAD
+ * OUT assertions: strstart <= window_size-MIN_LOOKAHEAD
+ *    At least one byte has been read, or avail_in == 0; reads are
+ *    performed for at least two bytes (required for the zip translate_eol
+ *    option -- not supported here).
+ */
+local void fill_window(s)
+    deflate_state *s;
+{
+    register unsigned n, m;
+    register Posf *p;
+    unsigned more;    /* Amount of free space at the end of the window. */
+    uInt wsize = s->w_size;
+
+    do {
+        more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart);
+
+        /* Deal with !@#$% 64K limit: */
+        if (sizeof(int) <= 2) {
+            if (more == 0 && s->strstart == 0 && s->lookahead == 0) {
+                more = wsize;
+
+            } else if (more == (unsigned)(-1)) {
+                /* Very unlikely, but possible on 16 bit machine if
+                 * strstart == 0 && lookahead == 1 (input done a byte at time)
+                 */
+                more--;
+            }
+        }
+
+        /* If the window is almost full and there is insufficient lookahead,
+         * move the upper half to the lower one to make room in the upper half.
+         */
+        if (s->strstart >= wsize+MAX_DIST(s)) {
+
+            zmemcpy(s->window, s->window+wsize, (unsigned)wsize);
+            s->match_start -= wsize;
+            s->strstart    -= wsize; /* we now have strstart >= MAX_DIST */
+            s->block_start -= (long) wsize;
+
+            /* Slide the hash table (could be avoided with 32 bit values
+               at the expense of memory usage). We slide even when level == 0
+               to keep the hash table consistent if we switch back to level > 0
+               later. (Using level 0 permanently is not an optimal usage of
+               zlib, so we don't care about this pathological case.)
+             */
+            /* %%% avoid this when Z_RLE */
+            n = s->hash_size;
+            p = &s->head[n];
+            do {
+                m = *--p;
+                *p = (Pos)(m >= wsize ? m-wsize : NIL);
+            } while (--n);
+
+            n = wsize;
+#ifndef FASTEST
+            p = &s->prev[n];
+            do {
+                m = *--p;
+                *p = (Pos)(m >= wsize ? m-wsize : NIL);
+                /* If n is not on any hash chain, prev[n] is garbage but
+                 * its value will never be used.
+                 */
+            } while (--n);
+#endif
+            more += wsize;
+        }
+        if (s->strm->avail_in == 0) return;
+
+        /* If there was no sliding:
+         *    strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
+         *    more == window_size - lookahead - strstart
+         * => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1)
+         * => more >= window_size - 2*WSIZE + 2
+         * In the BIG_MEM or MMAP case (not yet supported),
+         *   window_size == input_size + MIN_LOOKAHEAD  &&
+         *   strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD.
+         * Otherwise, window_size == 2*WSIZE so more >= 2.
+         * If there was sliding, more >= WSIZE. So in all cases, more >= 2.
+         */
+        Assert(more >= 2, "more < 2");
+
+        n = read_buf(s->strm, s->window + s->strstart + s->lookahead, more);
+        s->lookahead += n;
+
+        /* Initialize the hash value now that we have some input: */
+        if (s->lookahead >= MIN_MATCH) {
+            s->ins_h = s->window[s->strstart];
+            UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
+#if MIN_MATCH != 3
+            Call UPDATE_HASH() MIN_MATCH-3 more times
+#endif
+        }
+        /* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,
+         * but this is not important since only literal bytes will be emitted.
+         */
+
+    } while (s->lookahead < MIN_LOOKAHEAD && s->strm->avail_in != 0);
+}
+
+/* ===========================================================================
+ * Flush the current block, with given end-of-file flag.
+ * IN assertion: strstart is set to the end of the current match.
+ */
+#define FLUSH_BLOCK_ONLY(s, eof) { \
+   _tr_flush_block(s, (s->block_start >= 0L ? \
+                   (charf *)&s->window[(unsigned)s->block_start] : \
+                   (charf *)Z_NULL), \
+                (ulg)((long)s->strstart - s->block_start), \
+                (eof)); \
+   s->block_start = s->strstart; \
+   flush_pending(s->strm); \
+   Tracev((stderr,"[FLUSH]")); \
+}
+
+/* Same but force premature exit if necessary. */
+#define FLUSH_BLOCK(s, eof) { \
+   FLUSH_BLOCK_ONLY(s, eof); \
+   if (s->strm->avail_out == 0) return (eof) ? finish_started : need_more; \
+}
+
+/* ===========================================================================
+ * Copy without compression as much as possible from the input stream, return
+ * the current block state.
+ * This function does not insert new strings in the dictionary since
+ * uncompressible data is probably not useful. This function is used
+ * only for the level=0 compression option.
+ * NOTE: this function should be optimized to avoid extra copying from
+ * window to pending_buf.
+ */
+local block_state deflate_stored(s, flush)
+    deflate_state *s;
+    int flush;
+{
+    /* Stored blocks are limited to 0xffff bytes, pending_buf is limited
+     * to pending_buf_size, and each stored block has a 5 byte header:
+     */
+    ulg max_block_size = 0xffff;
+    ulg max_start;
+
+    if (max_block_size > s->pending_buf_size - 5) {
+        max_block_size = s->pending_buf_size - 5;
+    }
+
+    /* Copy as much as possible from input to output: */
+    for (;;) {
+        /* Fill the window as much as possible: */
+        if (s->lookahead <= 1) {
+
+            Assert(s->strstart < s->w_size+MAX_DIST(s) ||
+                   s->block_start >= (long)s->w_size, "slide too late");
+
+            fill_window(s);
+            if (s->lookahead == 0 && flush == Z_NO_FLUSH) return need_more;
+
+            if (s->lookahead == 0) break; /* flush the current block */
+        }
+        Assert(s->block_start >= 0L, "block gone");
+
+        s->strstart += s->lookahead;
+        s->lookahead = 0;
+
+        /* Emit a stored block if pending_buf will be full: */
+        max_start = s->block_start + max_block_size;
+        if (s->strstart == 0 || (ulg)s->strstart >= max_start) {
+            /* strstart == 0 is possible when wraparound on 16-bit machine */
+            s->lookahead = (uInt)(s->strstart - max_start);
+            s->strstart = (uInt)max_start;
+            FLUSH_BLOCK(s, 0);
+        }
+        /* Flush if we may have to slide, otherwise block_start may become
+         * negative and the data will be gone:
+         */
+        if (s->strstart - (uInt)s->block_start >= MAX_DIST(s)) {
+            FLUSH_BLOCK(s, 0);
+        }
+    }
+    FLUSH_BLOCK(s, flush == Z_FINISH);
+    return flush == Z_FINISH ? finish_done : block_done;
+}
+
+/* ===========================================================================
+ * Compress as much as possible from the input stream, return the current
+ * block state.
+ * This function does not perform lazy evaluation of matches and inserts
+ * new strings in the dictionary only for unmatched strings or for short
+ * matches. It is used only for the fast compression options.
+ */
+local block_state deflate_fast(s, flush)
+    deflate_state *s;
+    int flush;
+{
+    IPos hash_head = NIL; /* head of the hash chain */
+    int bflush;           /* set if current block must be flushed */
+
+    for (;;) {
+        /* Make sure that we always have enough lookahead, except
+         * at the end of the input file. We need MAX_MATCH bytes
+         * for the next match, plus MIN_MATCH bytes to insert the
+         * string following the next match.
+         */
+        if (s->lookahead < MIN_LOOKAHEAD) {
+            fill_window(s);
+            if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
+                return need_more;
+            }
+            if (s->lookahead == 0) break; /* flush the current block */
+        }
+
+        /* Insert the string window[strstart .. strstart+2] in the
+         * dictionary, and set hash_head to the head of the hash chain:
+         */
+        if (s->lookahead >= MIN_MATCH) {
+            INSERT_STRING(s, s->strstart, hash_head);
+        }
+
+        /* Find the longest match, discarding those <= prev_length.
+         * At this point we have always match_length < MIN_MATCH
+         */
+        if (hash_head != NIL && s->strstart - hash_head <= MAX_DIST(s)) {
+            /* To simplify the code, we prevent matches with the string
+             * of window index 0 (in particular we have to avoid a match
+             * of the string with itself at the start of the input file).
+             */
+#ifdef FASTEST
+            if ((s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) ||
+                (s->strategy == Z_RLE && s->strstart - hash_head == 1)) {
+                s->match_length = longest_match_fast (s, hash_head);
+            }
+#else
+            if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {
+                s->match_length = longest_match (s, hash_head);
+            } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
+                s->match_length = longest_match_fast (s, hash_head);
+            }
+#endif
+            /* longest_match() or longest_match_fast() sets match_start */
+        }
+        if (s->match_length >= MIN_MATCH) {
+            check_match(s, s->strstart, s->match_start, s->match_length);
+
+            _tr_tally_dist(s, s->strstart - s->match_start,
+                           s->match_length - MIN_MATCH, bflush);
+
+            s->lookahead -= s->match_length;
+
+            /* Insert new strings in the hash table only if the match length
+             * is not too large. This saves time but degrades compression.
+             */
+#ifndef FASTEST
+            if (s->match_length <= s->max_insert_length &&
+                s->lookahead >= MIN_MATCH) {
+                s->match_length--; /* string at strstart already in table */
+                do {
+                    s->strstart++;
+                    INSERT_STRING(s, s->strstart, hash_head);
+                    /* strstart never exceeds WSIZE-MAX_MATCH, so there are
+                     * always MIN_MATCH bytes ahead.
+                     */
+                } while (--s->match_length != 0);
+                s->strstart++;
+            } else
+#endif
+            {
+                s->strstart += s->match_length;
+                s->match_length = 0;
+                s->ins_h = s->window[s->strstart];
+                UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
+#if MIN_MATCH != 3
+                Call UPDATE_HASH() MIN_MATCH-3 more times
+#endif
+                /* If lookahead < MIN_MATCH, ins_h is garbage, but it does not
+                 * matter since it will be recomputed at next deflate call.
+                 */
+            }
+        } else {
+            /* No match, output a literal byte */
+            Tracevv((stderr,"%c", s->window[s->strstart]));
+            _tr_tally_lit (s, s->window[s->strstart], bflush);
+            s->lookahead--;
+            s->strstart++;
+        }
+        if (bflush) FLUSH_BLOCK(s, 0);
+    }
+    FLUSH_BLOCK(s, flush == Z_FINISH);
+    return flush == Z_FINISH ? finish_done : block_done;
+}
+
+#ifndef FASTEST
+/* ===========================================================================
+ * Same as above, but achieves better compression. We use a lazy
+ * evaluation for matches: a match is finally adopted only if there is
+ * no better match at the next window position.
+ */
+local block_state deflate_slow(s, flush)
+    deflate_state *s;
+    int flush;
+{
+    IPos hash_head = NIL;    /* head of hash chain */
+    int bflush;              /* set if current block must be flushed */
+
+    /* Process the input block. */
+    for (;;) {
+        /* Make sure that we always have enough lookahead, except
+         * at the end of the input file. We need MAX_MATCH bytes
+         * for the next match, plus MIN_MATCH bytes to insert the
+         * string following the next match.
+         */
+        if (s->lookahead < MIN_LOOKAHEAD) {
+            fill_window(s);
+            if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
+                return need_more;
+            }
+            if (s->lookahead == 0) break; /* flush the current block */
+        }
+
+        /* Insert the string window[strstart .. strstart+2] in the
+         * dictionary, and set hash_head to the head of the hash chain:
+         */
+        if (s->lookahead >= MIN_MATCH) {
+            INSERT_STRING(s, s->strstart, hash_head);
+        }
+
+        /* Find the longest match, discarding those <= prev_length.
+         */
+        s->prev_length = s->match_length, s->prev_match = s->match_start;
+        s->match_length = MIN_MATCH-1;
+
+        if (hash_head != NIL && s->prev_length < s->max_lazy_match &&
+            s->strstart - hash_head <= MAX_DIST(s)) {
+            /* To simplify the code, we prevent matches with the string
+             * of window index 0 (in particular we have to avoid a match
+             * of the string with itself at the start of the input file).
+             */
+            if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {
+                s->match_length = longest_match (s, hash_head);
+            } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
+                s->match_length = longest_match_fast (s, hash_head);
+            }
+            /* longest_match() or longest_match_fast() sets match_start */
+
+            if (s->match_length <= 5 && (s->strategy == Z_FILTERED
+#if TOO_FAR <= 32767
+                || (s->match_length == MIN_MATCH &&
+                    s->strstart - s->match_start > TOO_FAR)
+#endif
+                )) {
+
+                /* If prev_match is also MIN_MATCH, match_start is garbage
+                 * but we will ignore the current match anyway.
+                 */
+                s->match_length = MIN_MATCH-1;
+            }
+        }
+        /* If there was a match at the previous step and the current
+         * match is not better, output the previous match:
+         */
+        if (s->prev_length >= MIN_MATCH && s->match_length <= s->prev_length) {
+            uInt max_insert = s->strstart + s->lookahead - MIN_MATCH;
+            /* Do not insert strings in hash table beyond this. */
+
+            check_match(s, s->strstart-1, s->prev_match, s->prev_length);
+
+            _tr_tally_dist(s, s->strstart -1 - s->prev_match,
+                           s->prev_length - MIN_MATCH, bflush);
+
+            /* Insert in hash table all strings up to the end of the match.
+             * strstart-1 and strstart are already inserted. If there is not
+             * enough lookahead, the last two strings are not inserted in
+             * the hash table.
+             */
+            s->lookahead -= s->prev_length-1;
+            s->prev_length -= 2;
+            do {
+                if (++s->strstart <= max_insert) {
+                    INSERT_STRING(s, s->strstart, hash_head);
+                }
+            } while (--s->prev_length != 0);
+            s->match_available = 0;
+            s->match_length = MIN_MATCH-1;
+            s->strstart++;
+
+            if (bflush) FLUSH_BLOCK(s, 0);
+
+        } else if (s->match_available) {
+            /* If there was no match at the previous position, output a
+             * single literal. If there was a match but the current match
+             * is longer, truncate the previous match to a single literal.
+             */
+            Tracevv((stderr,"%c", s->window[s->strstart-1]));
+            _tr_tally_lit(s, s->window[s->strstart-1], bflush);
+            if (bflush) {
+                FLUSH_BLOCK_ONLY(s, 0);
+            }
+            s->strstart++;
+            s->lookahead--;
+            if (s->strm->avail_out == 0) return need_more;
+        } else {
+            /* There is no previous match to compare with, wait for
+             * the next step to decide.
+             */
+            s->match_available = 1;
+            s->strstart++;
+            s->lookahead--;
+        }
+    }
+    Assert (flush != Z_NO_FLUSH, "no flush?");
+    if (s->match_available) {
+        Tracevv((stderr,"%c", s->window[s->strstart-1]));
+        _tr_tally_lit(s, s->window[s->strstart-1], bflush);
+        s->match_available = 0;
+    }
+    FLUSH_BLOCK(s, flush == Z_FINISH);
+    return flush == Z_FINISH ? finish_done : block_done;
+}
+#endif /* FASTEST */
+
+#if 0
+/* ===========================================================================
+ * For Z_RLE, simply look for runs of bytes, generate matches only of distance
+ * one.  Do not maintain a hash table.  (It will be regenerated if this run of
+ * deflate switches away from Z_RLE.)
+ */
+local block_state deflate_rle(s, flush)
+    deflate_state *s;
+    int flush;
+{
+    int bflush;         /* set if current block must be flushed */
+    uInt run;           /* length of run */
+    uInt max;           /* maximum length of run */
+    uInt prev;          /* byte at distance one to match */
+    Bytef *scan;        /* scan for end of run */
+
+    for (;;) {
+        /* Make sure that we always have enough lookahead, except
+         * at the end of the input file. We need MAX_MATCH bytes
+         * for the longest encodable run.
+         */
+        if (s->lookahead < MAX_MATCH) {
+            fill_window(s);
+            if (s->lookahead < MAX_MATCH && flush == Z_NO_FLUSH) {
+                return need_more;
+            }
+            if (s->lookahead == 0) break; /* flush the current block */
+        }
+
+        /* See how many times the previous byte repeats */
+        run = 0;
+        if (s->strstart > 0) {      /* if there is a previous byte, that is */
+            max = s->lookahead < MAX_MATCH ? s->lookahead : MAX_MATCH;
+            scan = s->window + s->strstart - 1;
+            prev = *scan++;
+            do {
+                if (*scan++ != prev)
+                    break;
+            } while (++run < max);
+        }
+
+        /* Emit match if have run of MIN_MATCH or longer, else emit literal */
+        if (run >= MIN_MATCH) {
+            check_match(s, s->strstart, s->strstart - 1, run);
+            _tr_tally_dist(s, 1, run - MIN_MATCH, bflush);
+            s->lookahead -= run;
+            s->strstart += run;
+        } else {
+            /* No match, output a literal byte */
+            Tracevv((stderr,"%c", s->window[s->strstart]));
+            _tr_tally_lit (s, s->window[s->strstart], bflush);
+            s->lookahead--;
+            s->strstart++;
+        }
+        if (bflush) FLUSH_BLOCK(s, 0);
+    }
+    FLUSH_BLOCK(s, flush == Z_FINISH);
+    return flush == Z_FINISH ? finish_done : block_done;
+}
+#endif
diff --git a/uts/common/zmod/deflate.h b/uts/common/zmod/deflate.h
new file mode 100644
index 000000000000..d01a3c10e449
--- /dev/null
+++ b/uts/common/zmod/deflate.h
@@ -0,0 +1,331 @@
+/* deflate.h -- internal compression state
+ * Copyright (C) 1995-2004 Jean-loup Gailly
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+#ifndef _DEFLATE_H
+#define _DEFLATE_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include "zutil.h"
+
+/* define NO_GZIP when compiling if you want to disable gzip header and
+   trailer creation by deflate().  NO_GZIP would be used to avoid linking in
+   the crc code when it is not needed.  For shared libraries, gzip encoding
+   should be left enabled. */
+#ifndef NO_GZIP
+#  define GZIP
+#endif
+
+/* ===========================================================================
+ * Internal compression state.
+ */
+
+#define LENGTH_CODES 29
+/* number of length codes, not counting the special END_BLOCK code */
+
+#define LITERALS  256
+/* number of literal bytes 0..255 */
+
+#define L_CODES (LITERALS+1+LENGTH_CODES)
+/* number of Literal or Length codes, including the END_BLOCK code */
+
+#define D_CODES   30
+/* number of distance codes */
+
+#define BL_CODES  19
+/* number of codes used to transfer the bit lengths */
+
+#define HEAP_SIZE (2*L_CODES+1)
+/* maximum heap size */
+
+#define MAX_BITS 15
+/* All codes must not exceed MAX_BITS bits */
+
+#define INIT_STATE    42
+#define EXTRA_STATE   69
+#define NAME_STATE    73
+#define COMMENT_STATE 91
+#define HCRC_STATE   103
+#define BUSY_STATE   113
+#define FINISH_STATE 666
+/* Stream status */
+
+
+/* Data structure describing a single value and its code string. */
+typedef struct ct_data_s {
+    union {
+        ush  freq;       /* frequency count */
+        ush  code;       /* bit string */
+    } fc;
+    union {
+        ush  dad;        /* father node in Huffman tree */
+        ush  len;        /* length of bit string */
+    } dl;
+} FAR ct_data;
+
+#define Freq fc.freq
+#define Code fc.code
+#define Dad  dl.dad
+#define Len  dl.len
+
+typedef struct static_tree_desc_s  static_tree_desc;
+
+typedef struct tree_desc_s {
+    ct_data *dyn_tree;           /* the dynamic tree */
+    int     max_code;            /* largest code with non zero frequency */
+    static_tree_desc *stat_desc; /* the corresponding static tree */
+} FAR tree_desc;
+
+typedef ush Pos;
+typedef Pos FAR Posf;
+typedef unsigned IPos;
+
+/* A Pos is an index in the character window. We use short instead of int to
+ * save space in the various tables. IPos is used only for parameter passing.
+ */
+
+typedef struct internal_state {
+    z_streamp strm;      /* pointer back to this zlib stream */
+    int   status;        /* as the name implies */
+    Bytef *pending_buf;  /* output still pending */
+    ulg   pending_buf_size; /* size of pending_buf */
+    Bytef *pending_out;  /* next pending byte to output to the stream */
+    uInt   pending;      /* nb of bytes in the pending buffer */
+    int   wrap;          /* bit 0 true for zlib, bit 1 true for gzip */
+    gz_headerp  gzhead;  /* gzip header information to write */
+    uInt   gzindex;      /* where in extra, name, or comment */
+    Byte  method;        /* STORED (for zip only) or DEFLATED */
+    int   last_flush;    /* value of flush param for previous deflate call */
+
+                /* used by deflate.c: */
+
+    uInt  w_size;        /* LZ77 window size (32K by default) */
+    uInt  w_bits;        /* log2(w_size)  (8..16) */
+    uInt  w_mask;        /* w_size - 1 */
+
+    Bytef *window;
+    /* Sliding window. Input bytes are read into the second half of the window,
+     * and move to the first half later to keep a dictionary of at least wSize
+     * bytes. With this organization, matches are limited to a distance of
+     * wSize-MAX_MATCH bytes, but this ensures that IO is always
+     * performed with a length multiple of the block size. Also, it limits
+     * the window size to 64K, which is quite useful on MSDOS.
+     * To do: use the user input buffer as sliding window.
+     */
+
+    ulg window_size;
+    /* Actual size of window: 2*wSize, except when the user input buffer
+     * is directly used as sliding window.
+     */
+
+    Posf *prev;
+    /* Link to older string with same hash index. To limit the size of this
+     * array to 64K, this link is maintained only for the last 32K strings.
+     * An index in this array is thus a window index modulo 32K.
+     */
+
+    Posf *head; /* Heads of the hash chains or NIL. */
+
+    uInt  ins_h;          /* hash index of string to be inserted */
+    uInt  hash_size;      /* number of elements in hash table */
+    uInt  hash_bits;      /* log2(hash_size) */
+    uInt  hash_mask;      /* hash_size-1 */
+
+    uInt  hash_shift;
+    /* Number of bits by which ins_h must be shifted at each input
+     * step. It must be such that after MIN_MATCH steps, the oldest
+     * byte no longer takes part in the hash key, that is:
+     *   hash_shift * MIN_MATCH >= hash_bits
+     */
+
+    long block_start;
+    /* Window position at the beginning of the current output block. Gets
+     * negative when the window is moved backwards.
+     */
+
+    uInt match_length;           /* length of best match */
+    IPos prev_match;             /* previous match */
+    int match_available;         /* set if previous match exists */
+    uInt strstart;               /* start of string to insert */
+    uInt match_start;            /* start of matching string */
+    uInt lookahead;              /* number of valid bytes ahead in window */
+
+    uInt prev_length;
+    /* Length of the best match at previous step. Matches not greater than this
+     * are discarded. This is used in the lazy match evaluation.
+     */
+
+    uInt max_chain_length;
+    /* To speed up deflation, hash chains are never searched beyond this
+     * length.  A higher limit improves compression ratio but degrades the
+     * speed.
+     */
+
+    uInt max_lazy_match;
+    /* Attempt to find a better match only when the current match is strictly
+     * smaller than this value. This mechanism is used only for compression
+     * levels >= 4.
+     */
+#   define max_insert_length  max_lazy_match
+    /* Insert new strings in the hash table only if the match length is not
+     * greater than this length. This saves time but degrades compression.
+     * max_insert_length is used only for compression levels <= 3.
+     */
+
+    int level;    /* compression level (1..9) */
+    int strategy; /* favor or force Huffman coding*/
+
+    uInt good_match;
+    /* Use a faster search when the previous match is longer than this */
+
+    int nice_match; /* Stop searching when current match exceeds this */
+
+                /* used by trees.c: */
+    /* Didn't use ct_data typedef below to supress compiler warning */
+    struct ct_data_s dyn_ltree[HEAP_SIZE];   /* literal and length tree */
+    struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
+    struct ct_data_s bl_tree[2*BL_CODES+1];  /* Huffman tree for bit lengths */
+
+    struct tree_desc_s l_desc;               /* desc. for literal tree */
+    struct tree_desc_s d_desc;               /* desc. for distance tree */
+    struct tree_desc_s bl_desc;              /* desc. for bit length tree */
+
+    ush bl_count[MAX_BITS+1];
+    /* number of codes at each bit length for an optimal tree */
+
+    int heap[2*L_CODES+1];      /* heap used to build the Huffman trees */
+    int heap_len;               /* number of elements in the heap */
+    int heap_max;               /* element of largest frequency */
+    /* The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.
+     * The same heap array is used to build all trees.
+     */
+
+    uch depth[2*L_CODES+1];
+    /* Depth of each subtree used as tie breaker for trees of equal frequency
+     */
+
+    uchf *l_buf;          /* buffer for literals or lengths */
+
+    uInt  lit_bufsize;
+    /* Size of match buffer for literals/lengths.  There are 4 reasons for
+     * limiting lit_bufsize to 64K:
+     *   - frequencies can be kept in 16 bit counters
+     *   - if compression is not successful for the first block, all input
+     *     data is still in the window so we can still emit a stored block even
+     *     when input comes from standard input.  (This can also be done for
+     *     all blocks if lit_bufsize is not greater than 32K.)
+     *   - if compression is not successful for a file smaller than 64K, we can
+     *     even emit a stored file instead of a stored block (saving 5 bytes).
+     *     This is applicable only for zip (not gzip or zlib).
+     *   - creating new Huffman trees less frequently may not provide fast
+     *     adaptation to changes in the input data statistics. (Take for
+     *     example a binary file with poorly compressible code followed by
+     *     a highly compressible string table.) Smaller buffer sizes give
+     *     fast adaptation but have of course the overhead of transmitting
+     *     trees more frequently.
+     *   - I can't count above 4
+     */
+
+    uInt last_lit;      /* running index in l_buf */
+
+    ushf *d_buf;
+    /* Buffer for distances. To simplify the code, d_buf and l_buf have
+     * the same number of elements. To use different lengths, an extra flag
+     * array would be necessary.
+     */
+
+    ulg opt_len;        /* bit length of current block with optimal trees */
+    ulg static_len;     /* bit length of current block with static trees */
+    uInt matches;       /* number of string matches in current block */
+    int last_eob_len;   /* bit length of EOB code for last block */
+
+#ifdef DEBUG
+    ulg compressed_len; /* total bit length of compressed file mod 2^32 */
+    ulg bits_sent;      /* bit length of compressed data sent mod 2^32 */
+#endif
+
+    ush bi_buf;
+    /* Output buffer. bits are inserted starting at the bottom (least
+     * significant bits).
+     */
+    int bi_valid;
+    /* Number of valid bits in bi_buf.  All bits above the last valid bit
+     * are always zero.
+     */
+
+} FAR deflate_state;
+
+/* Output a byte on the stream.
+ * IN assertion: there is enough room in pending_buf.
+ */
+#define put_byte(s, c) {s->pending_buf[s->pending++] = (c);}
+
+
+#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
+/* Minimum amount of lookahead, except at the end of the input file.
+ * See deflate.c for comments about the MIN_MATCH+1.
+ */
+
+#define MAX_DIST(s)  ((s)->w_size-MIN_LOOKAHEAD)
+/* In order to simplify the code, particularly on 16 bit machines, match
+ * distances are limited to MAX_DIST instead of WSIZE.
+ */
+
+        /* in trees.c */
+void _tr_init         OF((deflate_state *s));
+int  _tr_tally        OF((deflate_state *s, unsigned dist, unsigned lc));
+void _tr_flush_block  OF((deflate_state *s, charf *buf, ulg stored_len,
+                          int eof));
+void _tr_align        OF((deflate_state *s));
+void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
+                          int eof));
+
+#define d_code(dist) \
+   ((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)])
+/* Mapping from a distance to a distance code. dist is the distance - 1 and
+ * must not have side effects. _dist_code[256] and _dist_code[257] are never
+ * used.
+ */
+
+#ifndef DEBUG
+/* Inline versions of _tr_tally for speed: */
+
+#if defined(GEN_TREES_H) || !defined(STDC)
+  extern uch _length_code[];
+  extern uch _dist_code[];
+#else
+  extern const uch _length_code[];
+  extern const uch _dist_code[];
+#endif
+
+# define _tr_tally_lit(s, c, flush) \
+  { uch cc = (c); \
+    s->d_buf[s->last_lit] = 0; \
+    s->l_buf[s->last_lit++] = cc; \
+    s->dyn_ltree[cc].Freq++; \
+    flush = (s->last_lit == s->lit_bufsize-1); \
+   }
+# define _tr_tally_dist(s, distance, length, flush) \
+  { uch len = (length); \
+    ush dist = (distance); \
+    s->d_buf[s->last_lit] = dist; \
+    s->l_buf[s->last_lit++] = len; \
+    dist--; \
+    s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
+    s->dyn_dtree[d_code(dist)].Freq++; \
+    flush = (s->last_lit == s->lit_bufsize-1); \
+  }
+#else
+# define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
+# define _tr_tally_dist(s, distance, length, flush) \
+              flush = _tr_tally(s, distance, length)
+#endif
+
+#endif /* _DEFLATE_H */
diff --git a/uts/common/zmod/inffast.c b/uts/common/zmod/inffast.c
new file mode 100644
index 000000000000..a6dcf3f5c8b8
--- /dev/null
+++ b/uts/common/zmod/inffast.c
@@ -0,0 +1,320 @@
+/* inffast.c -- fast decoding
+ * Copyright (C) 1995-2004 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include "zutil.h"
+#include "inftrees.h"
+#include "inflate.h"
+#include "inffast.h"
+
+#ifndef ASMINF
+
+/* Allow machine dependent optimization for post-increment or pre-increment.
+   Based on testing to date,
+   Pre-increment preferred for:
+   - PowerPC G3 (Adler)
+   - MIPS R5000 (Randers-Pehrson)
+   Post-increment preferred for:
+   - none
+   No measurable difference:
+   - Pentium III (Anderson)
+   - M68060 (Nikl)
+ */
+#ifdef POSTINC
+#  define OFF 0
+#  define PUP(a) *(a)++
+#else
+#  define OFF 1
+#  define PUP(a) *++(a)
+#endif
+
+/*
+   Decode literal, length, and distance codes and write out the resulting
+   literal and match bytes until either not enough input or output is
+   available, an end-of-block is encountered, or a data error is encountered.
+   When large enough input and output buffers are supplied to inflate(), for
+   example, a 16K input buffer and a 64K output buffer, more than 95% of the
+   inflate execution time is spent in this routine.
+
+   Entry assumptions:
+
+        state->mode == LEN
+        strm->avail_in >= 6
+        strm->avail_out >= 258
+        start >= strm->avail_out
+        state->bits < 8
+
+   On return, state->mode is one of:
+
+        LEN -- ran out of enough output space or enough available input
+        TYPE -- reached end of block code, inflate() to interpret next block
+        BAD -- error in block data
+
+   Notes:
+
+    - The maximum input bits used by a length/distance pair is 15 bits for the
+      length code, 5 bits for the length extra, 15 bits for the distance code,
+      and 13 bits for the distance extra.  This totals 48 bits, or six bytes.
+      Therefore if strm->avail_in >= 6, then there is enough input to avoid
+      checking for available input while decoding.
+
+    - The maximum bytes that a single length/distance pair can output is 258
+      bytes, which is the maximum length that can be coded.  inflate_fast()
+      requires strm->avail_out >= 258 for each loop to avoid checking for
+      output space.
+ */
+void inflate_fast(strm, start)
+z_streamp strm;
+unsigned start;         /* inflate()'s starting value for strm->avail_out */
+{
+    struct inflate_state FAR *state;
+    unsigned char FAR *in;      /* local strm->next_in */
+    unsigned char FAR *last;    /* while in < last, enough input available */
+    unsigned char FAR *out;     /* local strm->next_out */
+    unsigned char FAR *beg;     /* inflate()'s initial strm->next_out */
+    unsigned char FAR *end;     /* while out < end, enough space available */
+#ifdef INFLATE_STRICT
+    unsigned dmax;              /* maximum distance from zlib header */
+#endif
+    unsigned wsize;             /* window size or zero if not using window */
+    unsigned whave;             /* valid bytes in the window */
+    unsigned write;             /* window write index */
+    unsigned char FAR *window;  /* allocated sliding window, if wsize != 0 */
+    unsigned long hold;         /* local strm->hold */
+    unsigned bits;              /* local strm->bits */
+    code const FAR *lcode;      /* local strm->lencode */
+    code const FAR *dcode;      /* local strm->distcode */
+    unsigned lmask;             /* mask for first level of length codes */
+    unsigned dmask;             /* mask for first level of distance codes */
+    code this;                  /* retrieved table entry */
+    unsigned op;                /* code bits, operation, extra bits, or */
+                                /*  window position, window bytes to copy */
+    unsigned len;               /* match length, unused bytes */
+    unsigned dist;              /* match distance */
+    unsigned char FAR *from;    /* where to copy match from */
+
+    /* copy state to local variables */
+    state = (struct inflate_state FAR *)strm->state;
+    in = strm->next_in - OFF;
+    last = in + (strm->avail_in - 5);
+    out = strm->next_out - OFF;
+    beg = out - (start - strm->avail_out);
+    end = out + (strm->avail_out - 257);
+#ifdef INFLATE_STRICT
+    dmax = state->dmax;
+#endif
+    wsize = state->wsize;
+    whave = state->whave;
+    write = state->write;
+    window = state->window;
+    hold = state->hold;
+    bits = state->bits;
+    lcode = state->lencode;
+    dcode = state->distcode;
+    lmask = (1U << state->lenbits) - 1;
+    dmask = (1U << state->distbits) - 1;
+
+    /* decode literals and length/distances until end-of-block or not enough
+       input data or output space */
+    do {
+        if (bits < 15) {
+            hold += (unsigned long)(PUP(in)) << bits;
+            bits += 8;
+            hold += (unsigned long)(PUP(in)) << bits;
+            bits += 8;
+        }
+        this = lcode[hold & lmask];
+      dolen:
+        op = (unsigned)(this.bits);
+        hold >>= op;
+        bits -= op;
+        op = (unsigned)(this.op);
+        if (op == 0) {                          /* literal */
+            Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
+                    "inflate:         literal '%c'\n" :
+                    "inflate:         literal 0x%02x\n", this.val));
+            PUP(out) = (unsigned char)(this.val);
+        }
+        else if (op & 16) {                     /* length base */
+            len = (unsigned)(this.val);
+            op &= 15;                           /* number of extra bits */
+            if (op) {
+                if (bits < op) {
+                    hold += (unsigned long)(PUP(in)) << bits;
+                    bits += 8;
+                }
+                len += (unsigned)hold & ((1U << op) - 1);
+                hold >>= op;
+                bits -= op;
+            }
+            Tracevv((stderr, "inflate:         length %u\n", len));
+            if (bits < 15) {
+                hold += (unsigned long)(PUP(in)) << bits;
+                bits += 8;
+                hold += (unsigned long)(PUP(in)) << bits;
+                bits += 8;
+            }
+            this = dcode[hold & dmask];
+          dodist:
+            op = (unsigned)(this.bits);
+            hold >>= op;
+            bits -= op;
+            op = (unsigned)(this.op);
+            if (op & 16) {                      /* distance base */
+                dist = (unsigned)(this.val);
+                op &= 15;                       /* number of extra bits */
+                if (bits < op) {
+                    hold += (unsigned long)(PUP(in)) << bits;
+                    bits += 8;
+                    if (bits < op) {
+                        hold += (unsigned long)(PUP(in)) << bits;
+                        bits += 8;
+                    }
+                }
+                dist += (unsigned)hold & ((1U << op) - 1);
+#ifdef INFLATE_STRICT
+                if (dist > dmax) {
+                    strm->msg = (char *)"invalid distance too far back";
+                    state->mode = BAD;
+                    break;
+                }
+#endif
+                hold >>= op;
+                bits -= op;
+                Tracevv((stderr, "inflate:         distance %u\n", dist));
+                op = (unsigned)(out - beg);     /* max distance in output */
+                if (dist > op) {                /* see if copy from window */
+                    op = dist - op;             /* distance back in window */
+                    if (op > whave) {
+                        strm->msg = (char *)"invalid distance too far back";
+                        state->mode = BAD;
+                        break;
+                    }
+                    from = window - OFF;
+                    if (write == 0) {           /* very common case */
+                        from += wsize - op;
+                        if (op < len) {         /* some from window */
+                            len -= op;
+                            do {
+                                PUP(out) = PUP(from);
+                            } while (--op);
+                            from = out - dist;  /* rest from output */
+                        }
+                    }
+                    else if (write < op) {      /* wrap around window */
+                        from += wsize + write - op;
+                        op -= write;
+                        if (op < len) {         /* some from end of window */
+                            len -= op;
+                            do {
+                                PUP(out) = PUP(from);
+                            } while (--op);
+                            from = window - OFF;
+                            if (write < len) {  /* some from start of window */
+                                op = write;
+                                len -= op;
+                                do {
+                                    PUP(out) = PUP(from);
+                                } while (--op);
+                                from = out - dist;      /* rest from output */
+                            }
+                        }
+                    }
+                    else {                      /* contiguous in window */
+                        from += write - op;
+                        if (op < len) {         /* some from window */
+                            len -= op;
+                            do {
+                                PUP(out) = PUP(from);
+                            } while (--op);
+                            from = out - dist;  /* rest from output */
+                        }
+                    }
+                    while (len > 2) {
+                        PUP(out) = PUP(from);
+                        PUP(out) = PUP(from);
+                        PUP(out) = PUP(from);
+                        len -= 3;
+                    }
+                    if (len) {
+                        PUP(out) = PUP(from);
+                        if (len > 1)
+                            PUP(out) = PUP(from);
+                    }
+                }
+                else {
+                    from = out - dist;          /* copy direct from output */
+                    do {                        /* minimum length is three */
+                        PUP(out) = PUP(from);
+                        PUP(out) = PUP(from);
+                        PUP(out) = PUP(from);
+                        len -= 3;
+                    } while (len > 2);
+                    if (len) {
+                        PUP(out) = PUP(from);
+                        if (len > 1)
+                            PUP(out) = PUP(from);
+                    }
+                }
+            }
+            else if ((op & 64) == 0) {          /* 2nd level distance code */
+                this = dcode[this.val + (hold & ((1U << op) - 1))];
+                goto dodist;
+            }
+            else {
+                strm->msg = (char *)"invalid distance code";
+                state->mode = BAD;
+                break;
+            }
+        }
+        else if ((op & 64) == 0) {              /* 2nd level length code */
+            this = lcode[this.val + (hold & ((1U << op) - 1))];
+            goto dolen;
+        }
+        else if (op & 32) {                     /* end-of-block */
+            Tracevv((stderr, "inflate:         end of block\n"));
+            state->mode = TYPE;
+            break;
+        }
+        else {
+            strm->msg = (char *)"invalid literal/length code";
+            state->mode = BAD;
+            break;
+        }
+    } while (in < last && out < end);
+
+    /* return unused bytes (on entry, bits < 8, so in won't go too far back) */
+    len = bits >> 3;
+    in -= len;
+    bits -= len << 3;
+    hold &= (1U << bits) - 1;
+
+    /* update state and return */
+    strm->next_in = in + OFF;
+    strm->next_out = out + OFF;
+    strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last));
+    strm->avail_out = (unsigned)(out < end ?
+                                 257 + (end - out) : 257 - (out - end));
+    state->hold = hold;
+    state->bits = bits;
+    return;
+}
+
+/*
+   inflate_fast() speedups that turned out slower (on a PowerPC G3 750CXe):
+   - Using bit fields for code structure
+   - Different op definition to avoid & for extra bits (do & for table bits)
+   - Three separate decoding do-loops for direct, window, and write == 0
+   - Special case for distance > 1 copies to do overlapped load and store copy
+   - Explicit branch predictions (based on measured branch probabilities)
+   - Deferring match copy and interspersed it with decoding subsequent codes
+   - Swapping literal/length else
+   - Swapping window/direct else
+   - Larger unrolled copy loops (three is about right)
+   - Moving len -= 3 statement into middle of loop
+ */
+
+#endif /* !ASMINF */
diff --git a/uts/common/zmod/inffast.h b/uts/common/zmod/inffast.h
new file mode 100644
index 000000000000..2d214efa299a
--- /dev/null
+++ b/uts/common/zmod/inffast.h
@@ -0,0 +1,13 @@
+/* inffast.h -- header to use inffast.c
+ * Copyright (C) 1995-2003 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+void inflate_fast OF((z_streamp strm, unsigned start));
diff --git a/uts/common/zmod/inffixed.h b/uts/common/zmod/inffixed.h
new file mode 100644
index 000000000000..ed55df899109
--- /dev/null
+++ b/uts/common/zmod/inffixed.h
@@ -0,0 +1,96 @@
+    /* inffixed.h -- table for decoding fixed codes
+     * Generated automatically by makefixed().
+     */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+    /* WARNING: this file should *not* be used by applications. It
+       is part of the implementation of the compression library and
+       is subject to change. Applications should only use zlib.h.
+     */
+
+    static const code lenfix[512] = {
+        {96,7,0},{0,8,80},{0,8,16},{20,8,115},{18,7,31},{0,8,112},{0,8,48},
+        {0,9,192},{16,7,10},{0,8,96},{0,8,32},{0,9,160},{0,8,0},{0,8,128},
+        {0,8,64},{0,9,224},{16,7,6},{0,8,88},{0,8,24},{0,9,144},{19,7,59},
+        {0,8,120},{0,8,56},{0,9,208},{17,7,17},{0,8,104},{0,8,40},{0,9,176},
+        {0,8,8},{0,8,136},{0,8,72},{0,9,240},{16,7,4},{0,8,84},{0,8,20},
+        {21,8,227},{19,7,43},{0,8,116},{0,8,52},{0,9,200},{17,7,13},{0,8,100},
+        {0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232},{16,7,8},
+        {0,8,92},{0,8,28},{0,9,152},{20,7,83},{0,8,124},{0,8,60},{0,9,216},
+        {18,7,23},{0,8,108},{0,8,44},{0,9,184},{0,8,12},{0,8,140},{0,8,76},
+        {0,9,248},{16,7,3},{0,8,82},{0,8,18},{21,8,163},{19,7,35},{0,8,114},
+        {0,8,50},{0,9,196},{17,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2},
+        {0,8,130},{0,8,66},{0,9,228},{16,7,7},{0,8,90},{0,8,26},{0,9,148},
+        {20,7,67},{0,8,122},{0,8,58},{0,9,212},{18,7,19},{0,8,106},{0,8,42},
+        {0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244},{16,7,5},{0,8,86},
+        {0,8,22},{64,8,0},{19,7,51},{0,8,118},{0,8,54},{0,9,204},{17,7,15},
+        {0,8,102},{0,8,38},{0,9,172},{0,8,6},{0,8,134},{0,8,70},{0,9,236},
+        {16,7,9},{0,8,94},{0,8,30},{0,9,156},{20,7,99},{0,8,126},{0,8,62},
+        {0,9,220},{18,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142},
+        {0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{21,8,131},{18,7,31},
+        {0,8,113},{0,8,49},{0,9,194},{16,7,10},{0,8,97},{0,8,33},{0,9,162},
+        {0,8,1},{0,8,129},{0,8,65},{0,9,226},{16,7,6},{0,8,89},{0,8,25},
+        {0,9,146},{19,7,59},{0,8,121},{0,8,57},{0,9,210},{17,7,17},{0,8,105},
+        {0,8,41},{0,9,178},{0,8,9},{0,8,137},{0,8,73},{0,9,242},{16,7,4},
+        {0,8,85},{0,8,21},{16,8,258},{19,7,43},{0,8,117},{0,8,53},{0,9,202},
+        {17,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133},{0,8,69},
+        {0,9,234},{16,7,8},{0,8,93},{0,8,29},{0,9,154},{20,7,83},{0,8,125},
+        {0,8,61},{0,9,218},{18,7,23},{0,8,109},{0,8,45},{0,9,186},{0,8,13},
+        {0,8,141},{0,8,77},{0,9,250},{16,7,3},{0,8,83},{0,8,19},{21,8,195},
+        {19,7,35},{0,8,115},{0,8,51},{0,9,198},{17,7,11},{0,8,99},{0,8,35},
+        {0,9,166},{0,8,3},{0,8,131},{0,8,67},{0,9,230},{16,7,7},{0,8,91},
+        {0,8,27},{0,9,150},{20,7,67},{0,8,123},{0,8,59},{0,9,214},{18,7,19},
+        {0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139},{0,8,75},{0,9,246},
+        {16,7,5},{0,8,87},{0,8,23},{64,8,0},{19,7,51},{0,8,119},{0,8,55},
+        {0,9,206},{17,7,15},{0,8,103},{0,8,39},{0,9,174},{0,8,7},{0,8,135},
+        {0,8,71},{0,9,238},{16,7,9},{0,8,95},{0,8,31},{0,9,158},{20,7,99},
+        {0,8,127},{0,8,63},{0,9,222},{18,7,27},{0,8,111},{0,8,47},{0,9,190},
+        {0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80},{0,8,16},
+        {20,8,115},{18,7,31},{0,8,112},{0,8,48},{0,9,193},{16,7,10},{0,8,96},
+        {0,8,32},{0,9,161},{0,8,0},{0,8,128},{0,8,64},{0,9,225},{16,7,6},
+        {0,8,88},{0,8,24},{0,9,145},{19,7,59},{0,8,120},{0,8,56},{0,9,209},
+        {17,7,17},{0,8,104},{0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72},
+        {0,9,241},{16,7,4},{0,8,84},{0,8,20},{21,8,227},{19,7,43},{0,8,116},
+        {0,8,52},{0,9,201},{17,7,13},{0,8,100},{0,8,36},{0,9,169},{0,8,4},
+        {0,8,132},{0,8,68},{0,9,233},{16,7,8},{0,8,92},{0,8,28},{0,9,153},
+        {20,7,83},{0,8,124},{0,8,60},{0,9,217},{18,7,23},{0,8,108},{0,8,44},
+        {0,9,185},{0,8,12},{0,8,140},{0,8,76},{0,9,249},{16,7,3},{0,8,82},
+        {0,8,18},{21,8,163},{19,7,35},{0,8,114},{0,8,50},{0,9,197},{17,7,11},
+        {0,8,98},{0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229},
+        {16,7,7},{0,8,90},{0,8,26},{0,9,149},{20,7,67},{0,8,122},{0,8,58},
+        {0,9,213},{18,7,19},{0,8,106},{0,8,42},{0,9,181},{0,8,10},{0,8,138},
+        {0,8,74},{0,9,245},{16,7,5},{0,8,86},{0,8,22},{64,8,0},{19,7,51},
+        {0,8,118},{0,8,54},{0,9,205},{17,7,15},{0,8,102},{0,8,38},{0,9,173},
+        {0,8,6},{0,8,134},{0,8,70},{0,9,237},{16,7,9},{0,8,94},{0,8,30},
+        {0,9,157},{20,7,99},{0,8,126},{0,8,62},{0,9,221},{18,7,27},{0,8,110},
+        {0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253},{96,7,0},
+        {0,8,81},{0,8,17},{21,8,131},{18,7,31},{0,8,113},{0,8,49},{0,9,195},
+        {16,7,10},{0,8,97},{0,8,33},{0,9,163},{0,8,1},{0,8,129},{0,8,65},
+        {0,9,227},{16,7,6},{0,8,89},{0,8,25},{0,9,147},{19,7,59},{0,8,121},
+        {0,8,57},{0,9,211},{17,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9},
+        {0,8,137},{0,8,73},{0,9,243},{16,7,4},{0,8,85},{0,8,21},{16,8,258},
+        {19,7,43},{0,8,117},{0,8,53},{0,9,203},{17,7,13},{0,8,101},{0,8,37},
+        {0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235},{16,7,8},{0,8,93},
+        {0,8,29},{0,9,155},{20,7,83},{0,8,125},{0,8,61},{0,9,219},{18,7,23},
+        {0,8,109},{0,8,45},{0,9,187},{0,8,13},{0,8,141},{0,8,77},{0,9,251},
+        {16,7,3},{0,8,83},{0,8,19},{21,8,195},{19,7,35},{0,8,115},{0,8,51},
+        {0,9,199},{17,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131},
+        {0,8,67},{0,9,231},{16,7,7},{0,8,91},{0,8,27},{0,9,151},{20,7,67},
+        {0,8,123},{0,8,59},{0,9,215},{18,7,19},{0,8,107},{0,8,43},{0,9,183},
+        {0,8,11},{0,8,139},{0,8,75},{0,9,247},{16,7,5},{0,8,87},{0,8,23},
+        {64,8,0},{19,7,51},{0,8,119},{0,8,55},{0,9,207},{17,7,15},{0,8,103},
+        {0,8,39},{0,9,175},{0,8,7},{0,8,135},{0,8,71},{0,9,239},{16,7,9},
+        {0,8,95},{0,8,31},{0,9,159},{20,7,99},{0,8,127},{0,8,63},{0,9,223},
+        {18,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143},{0,8,79},
+        {0,9,255}
+    };
+
+    static const code distfix[32] = {
+        {16,5,1},{23,5,257},{19,5,17},{27,5,4097},{17,5,5},{25,5,1025},
+        {21,5,65},{29,5,16385},{16,5,3},{24,5,513},{20,5,33},{28,5,8193},
+        {18,5,9},{26,5,2049},{22,5,129},{64,5,0},{16,5,2},{23,5,385},
+        {19,5,25},{27,5,6145},{17,5,7},{25,5,1537},{21,5,97},{29,5,24577},
+        {16,5,4},{24,5,769},{20,5,49},{28,5,12289},{18,5,13},{26,5,3073},
+        {22,5,193},{64,5,0}
+    };
diff --git a/uts/common/zmod/inflate.c b/uts/common/zmod/inflate.c
new file mode 100644
index 000000000000..023e7a121ce7
--- /dev/null
+++ b/uts/common/zmod/inflate.c
@@ -0,0 +1,1395 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/* inflate.c -- zlib decompression
+ * Copyright (C) 1995-2005 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ * Change history:
+ *
+ * 1.2.beta0    24 Nov 2002
+ * - First version -- complete rewrite of inflate to simplify code, avoid
+ *   creation of window when not needed, minimize use of window when it is
+ *   needed, make inffast.c even faster, implement gzip decoding, and to
+ *   improve code readability and style over the previous zlib inflate code
+ *
+ * 1.2.beta1    25 Nov 2002
+ * - Use pointers for available input and output checking in inffast.c
+ * - Remove input and output counters in inffast.c
+ * - Change inffast.c entry and loop from avail_in >= 7 to >= 6
+ * - Remove unnecessary second byte pull from length extra in inffast.c
+ * - Unroll direct copy to three copies per loop in inffast.c
+ *
+ * 1.2.beta2    4 Dec 2002
+ * - Change external routine names to reduce potential conflicts
+ * - Correct filename to inffixed.h for fixed tables in inflate.c
+ * - Make hbuf[] unsigned char to match parameter type in inflate.c
+ * - Change strm->next_out[-state->offset] to *(strm->next_out - state->offset)
+ *   to avoid negation problem on Alphas (64 bit) in inflate.c
+ *
+ * 1.2.beta3    22 Dec 2002
+ * - Add comments on state->bits assertion in inffast.c
+ * - Add comments on op field in inftrees.h
+ * - Fix bug in reuse of allocated window after inflateReset()
+ * - Remove bit fields--back to byte structure for speed
+ * - Remove distance extra == 0 check in inflate_fast()--only helps for lengths
+ * - Change post-increments to pre-increments in inflate_fast(), PPC biased?
+ * - Add compile time option, POSTINC, to use post-increments instead (Intel?)
+ * - Make MATCH copy in inflate() much faster for when inflate_fast() not used
+ * - Use local copies of stream next and avail values, as well as local bit
+ *   buffer and bit count in inflate()--for speed when inflate_fast() not used
+ *
+ * 1.2.beta4    1 Jan 2003
+ * - Split ptr - 257 statements in inflate_table() to avoid compiler warnings
+ * - Move a comment on output buffer sizes from inffast.c to inflate.c
+ * - Add comments in inffast.c to introduce the inflate_fast() routine
+ * - Rearrange window copies in inflate_fast() for speed and simplification
+ * - Unroll last copy for window match in inflate_fast()
+ * - Use local copies of window variables in inflate_fast() for speed
+ * - Pull out common write == 0 case for speed in inflate_fast()
+ * - Make op and len in inflate_fast() unsigned for consistency
+ * - Add FAR to lcode and dcode declarations in inflate_fast()
+ * - Simplified bad distance check in inflate_fast()
+ * - Added inflateBackInit(), inflateBack(), and inflateBackEnd() in new
+ *   source file infback.c to provide a call-back interface to inflate for
+ *   programs like gzip and unzip -- uses window as output buffer to avoid
+ *   window copying
+ *
+ * 1.2.beta5    1 Jan 2003
+ * - Improved inflateBack() interface to allow the caller to provide initial
+ *   input in strm.
+ * - Fixed stored blocks bug in inflateBack()
+ *
+ * 1.2.beta6    4 Jan 2003
+ * - Added comments in inffast.c on effectiveness of POSTINC
+ * - Typecasting all around to reduce compiler warnings
+ * - Changed loops from while (1) or do {} while (1) to for (;;), again to
+ *   make compilers happy
+ * - Changed type of window in inflateBackInit() to unsigned char *
+ *
+ * 1.2.beta7    27 Jan 2003
+ * - Changed many types to unsigned or unsigned short to avoid warnings
+ * - Added inflateCopy() function
+ *
+ * 1.2.0        9 Mar 2003
+ * - Changed inflateBack() interface to provide separate opaque descriptors
+ *   for the in() and out() functions
+ * - Changed inflateBack() argument and in_func typedef to swap the length
+ *   and buffer address return values for the input function
+ * - Check next_in and next_out for Z_NULL on entry to inflate()
+ *
+ * The history for versions after 1.2.0 are in ChangeLog in zlib distribution.
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+#include "inflate.h"
+#include "inffast.h"
+
+#ifdef MAKEFIXED
+#  ifndef BUILDFIXED
+#    define BUILDFIXED
+#  endif
+#endif
+
+/* function prototypes */
+local void fixedtables OF((struct inflate_state FAR *state));
+local int updatewindow OF((z_streamp strm, unsigned out));
+#ifdef BUILDFIXED
+   void makefixed OF((void));
+#endif
+local unsigned syncsearch OF((unsigned FAR *have, unsigned char FAR *buf,
+                              unsigned len));
+
+int ZEXPORT inflateReset(strm)
+z_streamp strm;
+{
+    struct inflate_state FAR *state;
+
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+    strm->total_in = strm->total_out = state->total = 0;
+    strm->msg = Z_NULL;
+    strm->adler = 1;        /* to support ill-conceived Java test suite */
+    state->mode = HEAD;
+    state->last = 0;
+    state->havedict = 0;
+    state->dmax = 32768U;
+    state->head = Z_NULL;
+    state->wsize = 0;
+    state->whave = 0;
+    state->write = 0;
+    state->hold = 0;
+    state->bits = 0;
+    state->lencode = state->distcode = state->next = state->codes;
+    Tracev((stderr, "inflate: reset\n"));
+    return Z_OK;
+}
+
+int ZEXPORT inflatePrime(strm, bits, value)
+z_streamp strm;
+int bits;
+int value;
+{
+    struct inflate_state FAR *state;
+
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+    if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR;
+    value &= (1L << bits) - 1;
+    state->hold += value << state->bits;
+    state->bits += bits;
+    return Z_OK;
+}
+
+int ZEXPORT inflateInit2_(strm, windowBits, version, stream_size)
+z_streamp strm;
+int windowBits;
+const char *version;
+int stream_size;
+{
+    struct inflate_state FAR *state;
+
+    if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
+        stream_size != (int)(sizeof(z_stream)))
+        return Z_VERSION_ERROR;
+    if (strm == Z_NULL) return Z_STREAM_ERROR;
+    strm->msg = Z_NULL;                 /* in case we return an error */
+    if (strm->zalloc == (alloc_func)0) {
+        strm->zalloc = zcalloc;
+        strm->opaque = (voidpf)0;
+    }
+    if (strm->zfree == (free_func)0) strm->zfree = zcfree;
+    state = (struct inflate_state FAR *)
+            ZALLOC(strm, 1, sizeof(struct inflate_state));
+    if (state == Z_NULL) return Z_MEM_ERROR;
+    Tracev((stderr, "inflate: allocated\n"));
+    strm->state = (struct internal_state FAR *)state;
+    if (windowBits < 0) {
+        state->wrap = 0;
+        windowBits = -windowBits;
+    }
+    else {
+        state->wrap = (windowBits >> 4) + 1;
+#ifdef GUNZIP
+        if (windowBits < 48) windowBits &= 15;
+#endif
+    }
+    if (windowBits < 8 || windowBits > 15) {
+        ZFREE(strm, state);
+        strm->state = Z_NULL;
+        return Z_STREAM_ERROR;
+    }
+    state->wbits = (unsigned)windowBits;
+    state->window = Z_NULL;
+    return inflateReset(strm);
+}
+
+int ZEXPORT inflateInit_(strm, version, stream_size)
+z_streamp strm;
+const char *version;
+int stream_size;
+{
+    return inflateInit2_(strm, DEF_WBITS, version, stream_size);
+}
+
+/*
+   Return state with length and distance decoding tables and index sizes set to
+   fixed code decoding.  Normally this returns fixed tables from inffixed.h.
+   If BUILDFIXED is defined, then instead this routine builds the tables the
+   first time it's called, and returns those tables the first time and
+   thereafter.  This reduces the size of the code by about 2K bytes, in
+   exchange for a little execution time.  However, BUILDFIXED should not be
+   used for threaded applications, since the rewriting of the tables and virgin
+   may not be thread-safe.
+ */
+local void fixedtables(state)
+struct inflate_state FAR *state;
+{
+#ifdef BUILDFIXED
+    static int virgin = 1;
+    static code *lenfix, *distfix;
+    static code fixed[544];
+
+    /* build fixed huffman tables if first call (may not be thread safe) */
+    if (virgin) {
+        unsigned sym, bits;
+        static code *next;
+
+        /* literal/length table */
+        sym = 0;
+        while (sym < 144) state->lens[sym++] = 8;
+        while (sym < 256) state->lens[sym++] = 9;
+        while (sym < 280) state->lens[sym++] = 7;
+        while (sym < 288) state->lens[sym++] = 8;
+        next = fixed;
+        lenfix = next;
+        bits = 9;
+        inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
+
+        /* distance table */
+        sym = 0;
+        while (sym < 32) state->lens[sym++] = 5;
+        distfix = next;
+        bits = 5;
+        inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
+
+        /* do this just once */
+        virgin = 0;
+    }
+#else /* !BUILDFIXED */
+#   include "inffixed.h"
+#endif /* BUILDFIXED */
+    state->lencode = lenfix;
+    state->lenbits = 9;
+    state->distcode = distfix;
+    state->distbits = 5;
+}
+
+#ifdef MAKEFIXED
+#include <stdio.h>
+
+/*
+   Write out the inffixed.h that is #include'd above.  Defining MAKEFIXED also
+   defines BUILDFIXED, so the tables are built on the fly.  makefixed() writes
+   those tables to stdout, which would be piped to inffixed.h.  A small program
+   can simply call makefixed to do this:
+
+    void makefixed(void);
+
+    int main(void)
+    {
+        makefixed();
+        return 0;
+    }
+
+   Then that can be linked with zlib built with MAKEFIXED defined and run:
+
+    a.out > inffixed.h
+ */
+void makefixed()
+{
+    unsigned low, size;
+    struct inflate_state state;
+
+    fixedtables(&state);
+    puts("    /* inffixed.h -- table for decoding fixed codes");
+    puts("     * Generated automatically by makefixed().");
+    puts("     */");
+    puts("");
+    puts("    /* WARNING: this file should *not* be used by applications.");
+    puts("       It is part of the implementation of this library and is");
+    puts("       subject to change. Applications should only use zlib.h.");
+    puts("     */");
+    puts("");
+    size = 1U << 9;
+    printf("    static const code lenfix[%u] = {", size);
+    low = 0;
+    for (;;) {
+        if ((low % 7) == 0) printf("\n        ");
+        printf("{%u,%u,%d}", state.lencode[low].op, state.lencode[low].bits,
+               state.lencode[low].val);
+        if (++low == size) break;
+        putchar(',');
+    }
+    puts("\n    };");
+    size = 1U << 5;
+    printf("\n    static const code distfix[%u] = {", size);
+    low = 0;
+    for (;;) {
+        if ((low % 6) == 0) printf("\n        ");
+        printf("{%u,%u,%d}", state.distcode[low].op, state.distcode[low].bits,
+               state.distcode[low].val);
+        if (++low == size) break;
+        putchar(',');
+    }
+    puts("\n    };");
+}
+#endif /* MAKEFIXED */
+
+/*
+   Update the window with the last wsize (normally 32K) bytes written before
+   returning.  If window does not exist yet, create it.  This is only called
+   when a window is already in use, or when output has been written during this
+   inflate call, but the end of the deflate stream has not been reached yet.
+   It is also called to create a window for dictionary data when a dictionary
+   is loaded.
+
+   Providing output buffers larger than 32K to inflate() should provide a speed
+   advantage, since only the last 32K of output is copied to the sliding window
+   upon return from inflate(), and since all distances after the first 32K of
+   output will fall in the output data, making match copies simpler and faster.
+   The advantage may be dependent on the size of the processor's data caches.
+ */
+local int updatewindow(strm, out)
+z_streamp strm;
+unsigned out;
+{
+    struct inflate_state FAR *state;
+    unsigned copy, dist;
+
+    state = (struct inflate_state FAR *)strm->state;
+
+    /* if it hasn't been done already, allocate space for the window */
+    if (state->window == Z_NULL) {
+        state->window = (unsigned char FAR *)
+                        ZALLOC(strm, 1U << state->wbits,
+                               sizeof(unsigned char));
+        if (state->window == Z_NULL) return 1;
+    }
+
+    /* if window not in use yet, initialize */
+    if (state->wsize == 0) {
+        state->wsize = 1U << state->wbits;
+        state->write = 0;
+        state->whave = 0;
+    }
+
+    /* copy state->wsize or less output bytes into the circular window */
+    copy = out - strm->avail_out;
+    if (copy >= state->wsize) {
+        zmemcpy(state->window, strm->next_out - state->wsize, state->wsize);
+        state->write = 0;
+        state->whave = state->wsize;
+    }
+    else {
+        dist = state->wsize - state->write;
+        if (dist > copy) dist = copy;
+        zmemcpy(state->window + state->write, strm->next_out - copy, dist);
+        copy -= dist;
+        if (copy) {
+            zmemcpy(state->window, strm->next_out - copy, copy);
+            state->write = copy;
+            state->whave = state->wsize;
+        }
+        else {
+            state->write += dist;
+            if (state->write == state->wsize) state->write = 0;
+            if (state->whave < state->wsize) state->whave += dist;
+        }
+    }
+    return 0;
+}
+
+/* Macros for inflate(): */
+
+/* check function to use adler32() for zlib or crc32() for gzip */
+#ifdef GUNZIP
+#  define UPDATE(check, buf, len) \
+    (state->flags ? crc32(check, buf, len) : adler32(check, buf, len))
+#else
+#  define UPDATE(check, buf, len) adler32(check, buf, len)
+#endif
+
+/* check macros for header crc */
+#ifdef GUNZIP
+#  define CRC2(check, word) \
+    do { \
+        hbuf[0] = (unsigned char)(word); \
+        hbuf[1] = (unsigned char)((word) >> 8); \
+        check = crc32(check, hbuf, 2); \
+    } while (0)
+
+#  define CRC4(check, word) \
+    do { \
+        hbuf[0] = (unsigned char)(word); \
+        hbuf[1] = (unsigned char)((word) >> 8); \
+        hbuf[2] = (unsigned char)((word) >> 16); \
+        hbuf[3] = (unsigned char)((word) >> 24); \
+        check = crc32(check, hbuf, 4); \
+    } while (0)
+#endif
+
+/* Load registers with state in inflate() for speed */
+#define LOAD() \
+    do { \
+        put = strm->next_out; \
+        left = strm->avail_out; \
+        next = strm->next_in; \
+        have = strm->avail_in; \
+        hold = state->hold; \
+        bits = state->bits; \
+    } while (0)
+
+/* Restore state from registers in inflate() */
+#define RESTORE() \
+    do { \
+        strm->next_out = put; \
+        strm->avail_out = left; \
+        strm->next_in = next; \
+        strm->avail_in = have; \
+        state->hold = hold; \
+        state->bits = bits; \
+    } while (0)
+
+/* Clear the input bit accumulator */
+#define INITBITS() \
+    do { \
+        hold = 0; \
+        bits = 0; \
+    } while (0)
+
+/* Get a byte of input into the bit accumulator, or return from inflate()
+   if there is no input available. */
+#define PULLBYTE() \
+    do { \
+        if (have == 0) goto inf_leave; \
+        have--; \
+        hold += (unsigned long)(*next++) << bits; \
+        bits += 8; \
+    } while (0)
+
+/* Assure that there are at least n bits in the bit accumulator.  If there is
+   not enough available input to do that, then return from inflate(). */
+#define NEEDBITS(n) \
+    do { \
+        while (bits < (unsigned)(n)) \
+            PULLBYTE(); \
+    } while (0)
+
+/* Return the low n bits of the bit accumulator (n < 16) */
+#define BITS(n) \
+    ((unsigned)hold & ((1U << (n)) - 1))
+
+/* Remove n bits from the bit accumulator */
+#define DROPBITS(n) \
+    do { \
+        hold >>= (n); \
+        bits -= (unsigned)(n); \
+    } while (0)
+
+/* Remove zero to seven bits as needed to go to a byte boundary */
+#define BYTEBITS() \
+    do { \
+        hold >>= bits & 7; \
+        bits -= bits & 7; \
+    } while (0)
+
+/* Reverse the bytes in a 32-bit value */
+#define REVERSE(q) \
+    ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
+     (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
+
+/*
+   inflate() uses a state machine to process as much input data and generate as
+   much output data as possible before returning.  The state machine is
+   structured roughly as follows:
+
+    for (;;) switch (state) {
+    ...
+    case STATEn:
+        if (not enough input data or output space to make progress)
+            return;
+        ... make progress ...
+        state = STATEm;
+        break;
+    ...
+    }
+
+   so when inflate() is called again, the same case is attempted again, and
+   if the appropriate resources are provided, the machine proceeds to the
+   next state.  The NEEDBITS() macro is usually the way the state evaluates
+   whether it can proceed or should return.  NEEDBITS() does the return if
+   the requested bits are not available.  The typical use of the BITS macros
+   is:
+
+        NEEDBITS(n);
+        ... do something with BITS(n) ...
+        DROPBITS(n);
+
+   where NEEDBITS(n) either returns from inflate() if there isn't enough
+   input left to load n bits into the accumulator, or it continues.  BITS(n)
+   gives the low n bits in the accumulator.  When done, DROPBITS(n) drops
+   the low n bits off the accumulator.  INITBITS() clears the accumulator
+   and sets the number of available bits to zero.  BYTEBITS() discards just
+   enough bits to put the accumulator on a byte boundary.  After BYTEBITS()
+   and a NEEDBITS(8), then BITS(8) would return the next byte in the stream.
+
+   NEEDBITS(n) uses PULLBYTE() to get an available byte of input, or to return
+   if there is no input available.  The decoding of variable length codes uses
+   PULLBYTE() directly in order to pull just enough bytes to decode the next
+   code, and no more.
+
+   Some states loop until they get enough input, making sure that enough
+   state information is maintained to continue the loop where it left off
+   if NEEDBITS() returns in the loop.  For example, want, need, and keep
+   would all have to actually be part of the saved state in case NEEDBITS()
+   returns:
+
+    case STATEw:
+        while (want < need) {
+            NEEDBITS(n);
+            keep[want++] = BITS(n);
+            DROPBITS(n);
+        }
+        state = STATEx;
+    case STATEx:
+
+   As shown above, if the next state is also the next case, then the break
+   is omitted.
+
+   A state may also return if there is not enough output space available to
+   complete that state.  Those states are copying stored data, writing a
+   literal byte, and copying a matching string.
+
+   When returning, a "goto inf_leave" is used to update the total counters,
+   update the check value, and determine whether any progress has been made
+   during that inflate() call in order to return the proper return code.
+   Progress is defined as a change in either strm->avail_in or strm->avail_out.
+   When there is a window, goto inf_leave will update the window with the last
+   output written.  If a goto inf_leave occurs in the middle of decompression
+   and there is no window currently, goto inf_leave will create one and copy
+   output to the window for the next call of inflate().
+
+   In this implementation, the flush parameter of inflate() only affects the
+   return code (per zlib.h).  inflate() always writes as much as possible to
+   strm->next_out, given the space available and the provided input--the effect
+   documented in zlib.h of Z_SYNC_FLUSH.  Furthermore, inflate() always defers
+   the allocation of and copying into a sliding window until necessary, which
+   provides the effect documented in zlib.h for Z_FINISH when the entire input
+   stream available.  So the only thing the flush parameter actually does is:
+   when flush is set to Z_FINISH, inflate() cannot return Z_OK.  Instead it
+   will return Z_BUF_ERROR if it has not reached the end of the stream.
+ */
+
+int ZEXPORT inflate(strm, flush)
+z_streamp strm;
+int flush;
+{
+    struct inflate_state FAR *state;
+    unsigned char FAR *next;    /* next input */
+    unsigned char FAR *put;     /* next output */
+    unsigned have, left;        /* available input and output */
+    unsigned long hold;         /* bit buffer */
+    unsigned bits;              /* bits in bit buffer */
+    unsigned in, out;           /* save starting available input and output */
+    unsigned copy;              /* number of stored or match bytes to copy */
+    unsigned char FAR *from;    /* where to copy match bytes from */
+    code this;                  /* current decoding table entry */
+    code last;                  /* parent table entry */
+    unsigned len;               /* length to copy for repeats, bits to drop */
+    int ret;                    /* return code */
+#ifdef GUNZIP
+    unsigned char hbuf[4];      /* buffer for gzip header crc calculation */
+#endif
+    static const unsigned short order[19] = /* permutation of code lengths */
+        {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
+
+    if (strm == Z_NULL || strm->state == Z_NULL || strm->next_out == Z_NULL ||
+        (strm->next_in == Z_NULL && strm->avail_in != 0))
+        return Z_STREAM_ERROR;
+
+    state = (struct inflate_state FAR *)strm->state;
+    if (state->mode == TYPE) state->mode = TYPEDO;      /* skip check */
+    LOAD();
+    in = have;
+    out = left;
+    ret = Z_OK;
+    for (;;)
+        switch (state->mode) {
+        case HEAD:
+            if (state->wrap == 0) {
+                state->mode = TYPEDO;
+                break;
+            }
+            NEEDBITS(16);
+#ifdef GUNZIP
+            if ((state->wrap & 2) && hold == 0x8b1f) {  /* gzip header */
+                state->check = crc32(0L, Z_NULL, 0);
+                CRC2(state->check, hold);
+                INITBITS();
+                state->mode = FLAGS;
+                break;
+            }
+            state->flags = 0;           /* expect zlib header */
+            if (state->head != Z_NULL)
+                state->head->done = -1;
+            if (!(state->wrap & 1) ||   /* check if zlib header allowed */
+#else
+            if (
+#endif
+                ((BITS(8) << 8) + (hold >> 8)) % 31) {
+                strm->msg = (char *)"incorrect header check";
+                state->mode = BAD;
+                break;
+            }
+            if (BITS(4) != Z_DEFLATED) {
+                strm->msg = (char *)"unknown compression method";
+                state->mode = BAD;
+                break;
+            }
+            DROPBITS(4);
+            len = BITS(4) + 8;
+            if (len > state->wbits) {
+                strm->msg = (char *)"invalid window size";
+                state->mode = BAD;
+                break;
+            }
+            state->dmax = 1U << len;
+            Tracev((stderr, "inflate:   zlib header ok\n"));
+            strm->adler = state->check = adler32(0L, Z_NULL, 0);
+            state->mode = hold & 0x200 ? DICTID : TYPE;
+            INITBITS();
+            break;
+#ifdef GUNZIP
+        case FLAGS:
+            NEEDBITS(16);
+            state->flags = (int)(hold);
+            if ((state->flags & 0xff) != Z_DEFLATED) {
+                strm->msg = (char *)"unknown compression method";
+                state->mode = BAD;
+                break;
+            }
+            if (state->flags & 0xe000) {
+                strm->msg = (char *)"unknown header flags set";
+                state->mode = BAD;
+                break;
+            }
+            if (state->head != Z_NULL)
+                state->head->text = (int)((hold >> 8) & 1);
+            if (state->flags & 0x0200) CRC2(state->check, hold);
+            INITBITS();
+            state->mode = TIME;
+	    /*FALLTHRU*/
+        case TIME:
+            NEEDBITS(32);
+            if (state->head != Z_NULL)
+                state->head->time = hold;
+            if (state->flags & 0x0200) CRC4(state->check, hold);
+            INITBITS();
+            state->mode = OS;
+	    /*FALLTHRU*/
+        case OS:
+            NEEDBITS(16);
+            if (state->head != Z_NULL) {
+                state->head->xflags = (int)(hold & 0xff);
+                state->head->os = (int)(hold >> 8);
+            }
+            if (state->flags & 0x0200) CRC2(state->check, hold);
+            INITBITS();
+            state->mode = EXLEN;
+	    /*FALLTHRU*/
+        case EXLEN:
+            if (state->flags & 0x0400) {
+                NEEDBITS(16);
+                state->length = (unsigned)(hold);
+                if (state->head != Z_NULL)
+                    state->head->extra_len = (unsigned)hold;
+                if (state->flags & 0x0200) CRC2(state->check, hold);
+                INITBITS();
+            }
+            else if (state->head != Z_NULL)
+                state->head->extra = Z_NULL;
+            state->mode = EXTRA;
+	    /*FALLTHRU*/
+        case EXTRA:
+            if (state->flags & 0x0400) {
+                copy = state->length;
+                if (copy > have) copy = have;
+                if (copy) {
+                    if (state->head != Z_NULL &&
+                        state->head->extra != Z_NULL) {
+                        len = state->head->extra_len - state->length;
+                        zmemcpy(state->head->extra + len, next,
+                                len + copy > state->head->extra_max ?
+                                state->head->extra_max - len : copy);
+                    }
+                    if (state->flags & 0x0200)
+                        state->check = crc32(state->check, next, copy);
+                    have -= copy;
+                    next += copy;
+                    state->length -= copy;
+                }
+                if (state->length) goto inf_leave;
+            }
+            state->length = 0;
+            state->mode = NAME;
+	    /*FALLTHRU*/
+        case NAME:
+            if (state->flags & 0x0800) {
+                if (have == 0) goto inf_leave;
+                copy = 0;
+                do {
+                    len = (unsigned)(next[copy++]);
+                    if (state->head != Z_NULL &&
+                            state->head->name != Z_NULL &&
+                            state->length < state->head->name_max)
+                        state->head->name[state->length++] = len;
+                } while (len && copy < have);
+                if (state->flags & 0x0200)
+                    state->check = crc32(state->check, next, copy);
+                have -= copy;
+                next += copy;
+                if (len) goto inf_leave;
+            }
+            else if (state->head != Z_NULL)
+                state->head->name = Z_NULL;
+            state->length = 0;
+            state->mode = COMMENT;
+	    /*FALLTHRU*/
+        case COMMENT:
+            if (state->flags & 0x1000) {
+                if (have == 0) goto inf_leave;
+                copy = 0;
+                do {
+                    len = (unsigned)(next[copy++]);
+                    if (state->head != Z_NULL &&
+                            state->head->comment != Z_NULL &&
+                            state->length < state->head->comm_max)
+                        state->head->comment[state->length++] = len;
+                } while (len && copy < have);
+                if (state->flags & 0x0200)
+                    state->check = crc32(state->check, next, copy);
+                have -= copy;
+                next += copy;
+                if (len) goto inf_leave;
+            }
+            else if (state->head != Z_NULL)
+                state->head->comment = Z_NULL;
+            state->mode = HCRC;
+	    /*FALLTHRU*/
+        case HCRC:
+            if (state->flags & 0x0200) {
+                NEEDBITS(16);
+                if (hold != (state->check & 0xffff)) {
+                    strm->msg = (char *)"header crc mismatch";
+                    state->mode = BAD;
+                    break;
+                }
+                INITBITS();
+            }
+            if (state->head != Z_NULL) {
+                state->head->hcrc = (int)((state->flags >> 9) & 1);
+                state->head->done = 1;
+            }
+            strm->adler = state->check = crc32(0L, Z_NULL, 0);
+            state->mode = TYPE;
+            break;
+#endif
+        case DICTID:
+            NEEDBITS(32);
+            strm->adler = state->check = REVERSE(hold);
+            INITBITS();
+            state->mode = DICT;
+	    /*FALLTHRU*/
+        case DICT:
+            if (state->havedict == 0) {
+                RESTORE();
+                return Z_NEED_DICT;
+            }
+            strm->adler = state->check = adler32(0L, Z_NULL, 0);
+            state->mode = TYPE;
+	    /*FALLTHRU*/
+        case TYPE:
+            if (flush == Z_BLOCK) goto inf_leave;
+	    /*FALLTHRU*/
+        case TYPEDO:
+            if (state->last) {
+                BYTEBITS();
+                state->mode = CHECK;
+                break;
+            }
+            NEEDBITS(3);
+            state->last = BITS(1);
+            DROPBITS(1);
+            switch (BITS(2)) {
+            case 0:                             /* stored block */
+                Tracev((stderr, "inflate:     stored block%s\n",
+                        state->last ? " (last)" : ""));
+                state->mode = STORED;
+                break;
+            case 1:                             /* fixed block */
+                fixedtables(state);
+                Tracev((stderr, "inflate:     fixed codes block%s\n",
+                        state->last ? " (last)" : ""));
+                state->mode = LEN;              /* decode codes */
+                break;
+            case 2:                             /* dynamic block */
+                Tracev((stderr, "inflate:     dynamic codes block%s\n",
+                        state->last ? " (last)" : ""));
+                state->mode = TABLE;
+                break;
+            case 3:
+                strm->msg = (char *)"invalid block type";
+                state->mode = BAD;
+            }
+            DROPBITS(2);
+            break;
+        case STORED:
+            BYTEBITS();                         /* go to byte boundary */
+            NEEDBITS(32);
+            if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
+                strm->msg = (char *)"invalid stored block lengths";
+                state->mode = BAD;
+                break;
+            }
+            state->length = (unsigned)hold & 0xffff;
+            Tracev((stderr, "inflate:       stored length %u\n",
+                    state->length));
+            INITBITS();
+            state->mode = COPY;
+	    /*FALLTHRU*/
+        case COPY:
+            copy = state->length;
+            if (copy) {
+                if (copy > have) copy = have;
+                if (copy > left) copy = left;
+                if (copy == 0) goto inf_leave;
+                zmemcpy(put, next, copy);
+                have -= copy;
+                next += copy;
+                left -= copy;
+                put += copy;
+                state->length -= copy;
+                break;
+            }
+            Tracev((stderr, "inflate:       stored end\n"));
+            state->mode = TYPE;
+            break;
+        case TABLE:
+            NEEDBITS(14);
+            state->nlen = BITS(5) + 257;
+            DROPBITS(5);
+            state->ndist = BITS(5) + 1;
+            DROPBITS(5);
+            state->ncode = BITS(4) + 4;
+            DROPBITS(4);
+#ifndef PKZIP_BUG_WORKAROUND
+            if (state->nlen > 286 || state->ndist > 30) {
+                strm->msg = (char *)"too many length or distance symbols";
+                state->mode = BAD;
+                break;
+            }
+#endif
+            Tracev((stderr, "inflate:       table sizes ok\n"));
+            state->have = 0;
+            state->mode = LENLENS;
+	    /*FALLTHRU*/
+        case LENLENS:
+            while (state->have < state->ncode) {
+                NEEDBITS(3);
+                state->lens[order[state->have++]] = (unsigned short)BITS(3);
+                DROPBITS(3);
+            }
+            while (state->have < 19)
+                state->lens[order[state->have++]] = 0;
+            state->next = state->codes;
+            state->lencode = (code const FAR *)(state->next);
+            state->lenbits = 7;
+            ret = inflate_table(CODES, state->lens, 19, &(state->next),
+                                &(state->lenbits), state->work);
+            if (ret) {
+                strm->msg = (char *)"invalid code lengths set";
+                state->mode = BAD;
+                break;
+            }
+            Tracev((stderr, "inflate:       code lengths ok\n"));
+            state->have = 0;
+            state->mode = CODELENS;
+	    /*FALLTHRU*/
+        case CODELENS:
+            while (state->have < state->nlen + state->ndist) {
+                for (;;) {
+                    this = state->lencode[BITS(state->lenbits)];
+                    if ((unsigned)(this.bits) <= bits) break;
+                    PULLBYTE();
+                }
+                if (this.val < 16) {
+                    NEEDBITS(this.bits);
+                    DROPBITS(this.bits);
+                    state->lens[state->have++] = this.val;
+                }
+                else {
+                    if (this.val == 16) {
+                        NEEDBITS(this.bits + 2);
+                        DROPBITS(this.bits);
+                        if (state->have == 0) {
+                            strm->msg = (char *)"invalid bit length repeat";
+                            state->mode = BAD;
+                            break;
+                        }
+                        len = state->lens[state->have - 1];
+                        copy = 3 + BITS(2);
+                        DROPBITS(2);
+                    }
+                    else if (this.val == 17) {
+                        NEEDBITS(this.bits + 3);
+                        DROPBITS(this.bits);
+                        len = 0;
+                        copy = 3 + BITS(3);
+                        DROPBITS(3);
+                    }
+                    else {
+                        NEEDBITS(this.bits + 7);
+                        DROPBITS(this.bits);
+                        len = 0;
+                        copy = 11 + BITS(7);
+                        DROPBITS(7);
+                    }
+                    if (state->have + copy > state->nlen + state->ndist) {
+                        strm->msg = (char *)"invalid bit length repeat";
+                        state->mode = BAD;
+                        break;
+                    }
+                    while (copy--)
+                        state->lens[state->have++] = (unsigned short)len;
+                }
+            }
+
+            /* handle error breaks in while */
+            if (state->mode == BAD) break;
+
+            /* build code tables */
+            state->next = state->codes;
+            state->lencode = (code const FAR *)(state->next);
+            state->lenbits = 9;
+            ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
+                                &(state->lenbits), state->work);
+            if (ret) {
+                strm->msg = (char *)"invalid literal/lengths set";
+                state->mode = BAD;
+                break;
+            }
+            state->distcode = (code const FAR *)(state->next);
+            state->distbits = 6;
+            ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
+                            &(state->next), &(state->distbits), state->work);
+            if (ret) {
+                strm->msg = (char *)"invalid distances set";
+                state->mode = BAD;
+                break;
+            }
+            Tracev((stderr, "inflate:       codes ok\n"));
+            state->mode = LEN;
+	    /*FALLTHRU*/
+        case LEN:
+            if (have >= 6 && left >= 258) {
+                RESTORE();
+                inflate_fast(strm, out);
+                LOAD();
+                break;
+            }
+            for (;;) {
+                this = state->lencode[BITS(state->lenbits)];
+                if ((unsigned)(this.bits) <= bits) break;
+                PULLBYTE();
+            }
+            if (this.op && (this.op & 0xf0) == 0) {
+                last = this;
+                for (;;) {
+                    this = state->lencode[last.val +
+                            (BITS(last.bits + last.op) >> last.bits)];
+                    if ((unsigned)(last.bits + this.bits) <= bits) break;
+                    PULLBYTE();
+                }
+                DROPBITS(last.bits);
+            }
+            DROPBITS(this.bits);
+            state->length = (unsigned)this.val;
+            if ((int)(this.op) == 0) {
+                Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
+                        "inflate:         literal '%c'\n" :
+                        "inflate:         literal 0x%02x\n", this.val));
+                state->mode = LIT;
+                break;
+            }
+            if (this.op & 32) {
+                Tracevv((stderr, "inflate:         end of block\n"));
+                state->mode = TYPE;
+                break;
+            }
+            if (this.op & 64) {
+                strm->msg = (char *)"invalid literal/length code";
+                state->mode = BAD;
+                break;
+            }
+            state->extra = (unsigned)(this.op) & 15;
+            state->mode = LENEXT;
+	    /*FALLTHRU*/
+        case LENEXT:
+            if (state->extra) {
+                NEEDBITS(state->extra);
+                state->length += BITS(state->extra);
+                DROPBITS(state->extra);
+            }
+            Tracevv((stderr, "inflate:         length %u\n", state->length));
+            state->mode = DIST;
+	    /*FALLTHRU*/
+        case DIST:
+            for (;;) {
+                this = state->distcode[BITS(state->distbits)];
+                if ((unsigned)(this.bits) <= bits) break;
+                PULLBYTE();
+            }
+            if ((this.op & 0xf0) == 0) {
+                last = this;
+                for (;;) {
+                    this = state->distcode[last.val +
+                            (BITS(last.bits + last.op) >> last.bits)];
+                    if ((unsigned)(last.bits + this.bits) <= bits) break;
+                    PULLBYTE();
+                }
+                DROPBITS(last.bits);
+            }
+            DROPBITS(this.bits);
+            if (this.op & 64) {
+                strm->msg = (char *)"invalid distance code";
+                state->mode = BAD;
+                break;
+            }
+            state->offset = (unsigned)this.val;
+            state->extra = (unsigned)(this.op) & 15;
+            state->mode = DISTEXT;
+	    /*FALLTHRU*/
+        case DISTEXT:
+            if (state->extra) {
+                NEEDBITS(state->extra);
+                state->offset += BITS(state->extra);
+                DROPBITS(state->extra);
+            }
+#ifdef INFLATE_STRICT
+            if (state->offset > state->dmax) {
+                strm->msg = (char *)"invalid distance too far back";
+                state->mode = BAD;
+                break;
+            }
+#endif
+            if (state->offset > state->whave + out - left) {
+                strm->msg = (char *)"invalid distance too far back";
+                state->mode = BAD;
+                break;
+            }
+            Tracevv((stderr, "inflate:         distance %u\n", state->offset));
+            state->mode = MATCH;
+	    /*FALLTHRU*/
+        case MATCH:
+            if (left == 0) goto inf_leave;
+            copy = out - left;
+            if (state->offset > copy) {         /* copy from window */
+                copy = state->offset - copy;
+                if (copy > state->write) {
+                    copy -= state->write;
+                    from = state->window + (state->wsize - copy);
+                }
+                else
+                    from = state->window + (state->write - copy);
+                if (copy > state->length) copy = state->length;
+            }
+            else {                              /* copy from output */
+                from = put - state->offset;
+                copy = state->length;
+            }
+            if (copy > left) copy = left;
+            left -= copy;
+            state->length -= copy;
+            do {
+                *put++ = *from++;
+            } while (--copy);
+            if (state->length == 0) state->mode = LEN;
+            break;
+        case LIT:
+            if (left == 0) goto inf_leave;
+            *put++ = (unsigned char)(state->length);
+            left--;
+            state->mode = LEN;
+            break;
+        case CHECK:
+            if (state->wrap) {
+                NEEDBITS(32);
+                out -= left;
+                strm->total_out += out;
+                state->total += out;
+                if (out)
+                    strm->adler = state->check =
+                        UPDATE(state->check, put - out, out);
+                out = left;
+                if ((
+#ifdef GUNZIP
+                     state->flags ? hold :
+#endif
+                     REVERSE(hold)) != state->check) {
+                    strm->msg = (char *)"incorrect data check";
+                    state->mode = BAD;
+                    break;
+                }
+                INITBITS();
+                Tracev((stderr, "inflate:   check matches trailer\n"));
+            }
+#ifdef GUNZIP
+            state->mode = LENGTH;
+	    /*FALLTHRU*/
+        case LENGTH:
+            if (state->wrap && state->flags) {
+                NEEDBITS(32);
+                if (hold != (state->total & 0xffffffffUL)) {
+                    strm->msg = (char *)"incorrect length check";
+                    state->mode = BAD;
+                    break;
+                }
+                INITBITS();
+                Tracev((stderr, "inflate:   length matches trailer\n"));
+            }
+#endif
+            state->mode = DONE;
+	    /*FALLTHRU*/
+        case DONE:
+            ret = Z_STREAM_END;
+            goto inf_leave;
+        case BAD:
+            ret = Z_DATA_ERROR;
+            goto inf_leave;
+        case MEM:
+            return Z_MEM_ERROR;
+        case SYNC:
+        default:
+            return Z_STREAM_ERROR;
+        }
+
+    /*
+       Return from inflate(), updating the total counts and the check value.
+       If there was no progress during the inflate() call, return a buffer
+       error.  Call updatewindow() to create and/or update the window state.
+       Note: a memory error from inflate() is non-recoverable.
+     */
+  inf_leave:
+    RESTORE();
+    if (state->wsize || (state->mode < CHECK && out != strm->avail_out))
+        if (updatewindow(strm, out)) {
+            state->mode = MEM;
+            return Z_MEM_ERROR;
+        }
+    in -= strm->avail_in;
+    out -= strm->avail_out;
+    strm->total_in += in;
+    strm->total_out += out;
+    state->total += out;
+    if (state->wrap && out)
+        strm->adler = state->check =
+            UPDATE(state->check, strm->next_out - out, out);
+    strm->data_type = state->bits + (state->last ? 64 : 0) +
+                      (state->mode == TYPE ? 128 : 0);
+    if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
+        ret = Z_BUF_ERROR;
+    return ret;
+}
+
+int ZEXPORT inflateEnd(strm)
+z_streamp strm;
+{
+    struct inflate_state FAR *state;
+    if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
+        return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+    if (state->window != Z_NULL) ZFREE(strm, state->window);
+    ZFREE(strm, strm->state);
+    strm->state = Z_NULL;
+    Tracev((stderr, "inflate: end\n"));
+    return Z_OK;
+}
+
+int ZEXPORT inflateSetDictionary(strm, dictionary, dictLength)
+z_streamp strm;
+const Bytef *dictionary;
+uInt dictLength;
+{
+    struct inflate_state FAR *state;
+    unsigned long id;
+
+    /* check state */
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+    if (state->wrap != 0 && state->mode != DICT)
+        return Z_STREAM_ERROR;
+
+    /* check for correct dictionary id */
+    if (state->mode == DICT) {
+        id = adler32(0L, Z_NULL, 0);
+        id = adler32(id, dictionary, dictLength);
+        if (id != state->check)
+            return Z_DATA_ERROR;
+    }
+
+    /* copy dictionary to window */
+    if (updatewindow(strm, strm->avail_out)) {
+        state->mode = MEM;
+        return Z_MEM_ERROR;
+    }
+    if (dictLength > state->wsize) {
+        zmemcpy(state->window, dictionary + dictLength - state->wsize,
+                state->wsize);
+        state->whave = state->wsize;
+    }
+    else {
+        zmemcpy(state->window + state->wsize - dictLength, dictionary,
+                dictLength);
+        state->whave = dictLength;
+    }
+    state->havedict = 1;
+    Tracev((stderr, "inflate:   dictionary set\n"));
+    return Z_OK;
+}
+
+int ZEXPORT inflateGetHeader(strm, head)
+z_streamp strm;
+gz_headerp head;
+{
+    struct inflate_state FAR *state;
+
+    /* check state */
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+    if ((state->wrap & 2) == 0) return Z_STREAM_ERROR;
+
+    /* save header structure */
+    state->head = head;
+    head->done = 0;
+    return Z_OK;
+}
+
+/*
+   Search buf[0..len-1] for the pattern: 0, 0, 0xff, 0xff.  Return when found
+   or when out of input.  When called, *have is the number of pattern bytes
+   found in order so far, in 0..3.  On return *have is updated to the new
+   state.  If on return *have equals four, then the pattern was found and the
+   return value is how many bytes were read including the last byte of the
+   pattern.  If *have is less than four, then the pattern has not been found
+   yet and the return value is len.  In the latter case, syncsearch() can be
+   called again with more data and the *have state.  *have is initialized to
+   zero for the first call.
+ */
+local unsigned syncsearch(have, buf, len)
+unsigned FAR *have;
+unsigned char FAR *buf;
+unsigned len;
+{
+    unsigned got;
+    unsigned next;
+
+    got = *have;
+    next = 0;
+    while (next < len && got < 4) {
+        if ((int)(buf[next]) == (got < 2 ? 0 : 0xff))
+            got++;
+        else if (buf[next])
+            got = 0;
+        else
+            got = 4 - got;
+        next++;
+    }
+    *have = got;
+    return next;
+}
+
+int ZEXPORT inflateSync(strm)
+z_streamp strm;
+{
+    unsigned len;               /* number of bytes to look at or looked at */
+    unsigned long in, out;      /* temporary to save total_in and total_out */
+    unsigned char buf[4];       /* to restore bit buffer to byte string */
+    struct inflate_state FAR *state;
+
+    /* check parameters */
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+    if (strm->avail_in == 0 && state->bits < 8) return Z_BUF_ERROR;
+
+    /* if first time, start search in bit buffer */
+    if (state->mode != SYNC) {
+        state->mode = SYNC;
+        state->hold <<= state->bits & 7;
+        state->bits -= state->bits & 7;
+        len = 0;
+        while (state->bits >= 8) {
+            buf[len++] = (unsigned char)(state->hold);
+            state->hold >>= 8;
+            state->bits -= 8;
+        }
+        state->have = 0;
+        (void) syncsearch(&(state->have), buf, len);
+    }
+
+    /* search available input */
+    len = syncsearch(&(state->have), strm->next_in, strm->avail_in);
+    strm->avail_in -= len;
+    strm->next_in += len;
+    strm->total_in += len;
+
+    /* return no joy or set up to restart inflate() on a new block */
+    if (state->have != 4) return Z_DATA_ERROR;
+    in = strm->total_in;  out = strm->total_out;
+    (void) inflateReset(strm);
+    strm->total_in = in;  strm->total_out = out;
+    state->mode = TYPE;
+    return Z_OK;
+}
+
+/*
+   Returns true if inflate is currently at the end of a block generated by
+   Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
+   implementation to provide an additional safety check. PPP uses
+   Z_SYNC_FLUSH but removes the length bytes of the resulting empty stored
+   block. When decompressing, PPP checks that at the end of input packet,
+   inflate is waiting for these length bytes.
+ */
+int ZEXPORT inflateSyncPoint(strm)
+z_streamp strm;
+{
+    struct inflate_state FAR *state;
+
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+    return state->mode == STORED && state->bits == 0;
+}
+
+int ZEXPORT inflateCopy(dest, source)
+z_streamp dest;
+z_streamp source;
+{
+    struct inflate_state FAR *state;
+    struct inflate_state FAR *copy;
+    unsigned char FAR *window;
+    unsigned wsize;
+
+    /* check input */
+    if (dest == Z_NULL || source == Z_NULL || source->state == Z_NULL ||
+        source->zalloc == (alloc_func)0 || source->zfree == (free_func)0)
+        return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)source->state;
+
+    /* allocate space */
+    copy = (struct inflate_state FAR *)
+           ZALLOC(source, 1, sizeof(struct inflate_state));
+    if (copy == Z_NULL) return Z_MEM_ERROR;
+    window = Z_NULL;
+    if (state->window != Z_NULL) {
+        window = (unsigned char FAR *)
+                 ZALLOC(source, 1U << state->wbits, sizeof(unsigned char));
+        if (window == Z_NULL) {
+            ZFREE(source, copy);
+            return Z_MEM_ERROR;
+        }
+    }
+
+    /* copy state */
+    zmemcpy(dest, source, sizeof(z_stream));
+    zmemcpy(copy, state, sizeof(struct inflate_state));
+    if (state->lencode >= state->codes &&
+        state->lencode <= state->codes + ENOUGH - 1) {
+        copy->lencode = copy->codes + (state->lencode - state->codes);
+        copy->distcode = copy->codes + (state->distcode - state->codes);
+    }
+    copy->next = copy->codes + (state->next - state->codes);
+    if (window != Z_NULL) {
+        wsize = 1U << state->wbits;
+        zmemcpy(window, state->window, wsize);
+    }
+    copy->window = window;
+    dest->state = (struct internal_state FAR *)copy;
+    return Z_OK;
+}
diff --git a/uts/common/zmod/inflate.h b/uts/common/zmod/inflate.h
new file mode 100644
index 000000000000..4d28b221770b
--- /dev/null
+++ b/uts/common/zmod/inflate.h
@@ -0,0 +1,117 @@
+/* inflate.h -- internal inflate state definition
+ * Copyright (C) 1995-2004 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+/* define NO_GZIP when compiling if you want to disable gzip header and
+   trailer decoding by inflate().  NO_GZIP would be used to avoid linking in
+   the crc code when it is not needed.  For shared libraries, gzip decoding
+   should be left enabled. */
+#ifndef NO_GZIP
+#  define GUNZIP
+#endif
+
+/* Possible inflate modes between inflate() calls */
+typedef enum {
+    HEAD,       /* i: waiting for magic header */
+    FLAGS,      /* i: waiting for method and flags (gzip) */
+    TIME,       /* i: waiting for modification time (gzip) */
+    OS,         /* i: waiting for extra flags and operating system (gzip) */
+    EXLEN,      /* i: waiting for extra length (gzip) */
+    EXTRA,      /* i: waiting for extra bytes (gzip) */
+    NAME,       /* i: waiting for end of file name (gzip) */
+    COMMENT,    /* i: waiting for end of comment (gzip) */
+    HCRC,       /* i: waiting for header crc (gzip) */
+    DICTID,     /* i: waiting for dictionary check value */
+    DICT,       /* waiting for inflateSetDictionary() call */
+        TYPE,       /* i: waiting for type bits, including last-flag bit */
+        TYPEDO,     /* i: same, but skip check to exit inflate on new block */
+        STORED,     /* i: waiting for stored size (length and complement) */
+        COPY,       /* i/o: waiting for input or output to copy stored block */
+        TABLE,      /* i: waiting for dynamic block table lengths */
+        LENLENS,    /* i: waiting for code length code lengths */
+        CODELENS,   /* i: waiting for length/lit and distance code lengths */
+            LEN,        /* i: waiting for length/lit code */
+            LENEXT,     /* i: waiting for length extra bits */
+            DIST,       /* i: waiting for distance code */
+            DISTEXT,    /* i: waiting for distance extra bits */
+            MATCH,      /* o: waiting for output space to copy string */
+            LIT,        /* o: waiting for output space to write literal */
+    CHECK,      /* i: waiting for 32-bit check value */
+    LENGTH,     /* i: waiting for 32-bit length (gzip) */
+    DONE,       /* finished check, done -- remain here until reset */
+    BAD,        /* got a data error -- remain here until reset */
+    MEM,        /* got an inflate() memory error -- remain here until reset */
+    SYNC        /* looking for synchronization bytes to restart inflate() */
+} inflate_mode;
+
+/*
+    State transitions between above modes -
+
+    (most modes can go to the BAD or MEM mode -- not shown for clarity)
+
+    Process header:
+        HEAD -> (gzip) or (zlib)
+        (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME
+        NAME -> COMMENT -> HCRC -> TYPE
+        (zlib) -> DICTID or TYPE
+        DICTID -> DICT -> TYPE
+    Read deflate blocks:
+            TYPE -> STORED or TABLE or LEN or CHECK
+            STORED -> COPY -> TYPE
+            TABLE -> LENLENS -> CODELENS -> LEN
+    Read deflate codes:
+                LEN -> LENEXT or LIT or TYPE
+                LENEXT -> DIST -> DISTEXT -> MATCH -> LEN
+                LIT -> LEN
+    Process trailer:
+        CHECK -> LENGTH -> DONE
+ */
+
+/* state maintained between inflate() calls.  Approximately 7K bytes. */
+struct inflate_state {
+    inflate_mode mode;          /* current inflate mode */
+    int last;                   /* true if processing last block */
+    int wrap;                   /* bit 0 true for zlib, bit 1 true for gzip */
+    int havedict;               /* true if dictionary provided */
+    int flags;                  /* gzip header method and flags (0 if zlib) */
+    unsigned dmax;              /* zlib header max distance (INFLATE_STRICT) */
+    unsigned long check;        /* protected copy of check value */
+    unsigned long total;        /* protected copy of output count */
+    gz_headerp head;            /* where to save gzip header information */
+        /* sliding window */
+    unsigned wbits;             /* log base 2 of requested window size */
+    unsigned wsize;             /* window size or zero if not using window */
+    unsigned whave;             /* valid bytes in the window */
+    unsigned write;             /* window write index */
+    unsigned char FAR *window;  /* allocated sliding window, if needed */
+        /* bit accumulator */
+    unsigned long hold;         /* input bit accumulator */
+    unsigned bits;              /* number of bits in "in" */
+        /* for string and stored block copying */
+    unsigned length;            /* literal or length of data to copy */
+    unsigned offset;            /* distance back to copy string from */
+        /* for table and code decoding */
+    unsigned extra;             /* extra bits needed */
+        /* fixed and dynamic code tables */
+    code const FAR *lencode;    /* starting table for length/literal codes */
+    code const FAR *distcode;   /* starting table for distance codes */
+    unsigned lenbits;           /* index bits for lencode */
+    unsigned distbits;          /* index bits for distcode */
+        /* dynamic table building */
+    unsigned ncode;             /* number of code length code lengths */
+    unsigned nlen;              /* number of length code lengths */
+    unsigned ndist;             /* number of distance code lengths */
+    unsigned have;              /* number of code lengths in lens[] */
+    code FAR *next;             /* next available space in codes[] */
+    unsigned short lens[320];   /* temporary storage for code lengths */
+    unsigned short work[288];   /* work area for code table building */
+    code codes[ENOUGH];         /* space for code tables */
+};
diff --git a/uts/common/zmod/inftrees.c b/uts/common/zmod/inftrees.c
new file mode 100644
index 000000000000..2d371675301c
--- /dev/null
+++ b/uts/common/zmod/inftrees.c
@@ -0,0 +1,331 @@
+/* inftrees.c -- generate Huffman trees for efficient decoding
+ * Copyright (C) 1995-2005 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include "zutil.h"
+#include "inftrees.h"
+
+#define MAXBITS 15
+
+static const char inflate_copyright[] =
+   " inflate 1.2.3 Copyright 1995-2005 Mark Adler ";
+/*
+  If you use the zlib library in a product, an acknowledgment is welcome
+  in the documentation of your product. If for some reason you cannot
+  include such an acknowledgment, I would appreciate that you keep this
+  copyright string in the executable of your product.
+ */
+
+/*
+   Build a set of tables to decode the provided canonical Huffman code.
+   The code lengths are lens[0..codes-1].  The result starts at *table,
+   whose indices are 0..2^bits-1.  work is a writable array of at least
+   lens shorts, which is used as a work area.  type is the type of code
+   to be generated, CODES, LENS, or DISTS.  On return, zero is success,
+   -1 is an invalid code, and +1 means that ENOUGH isn't enough.  table
+   on return points to the next available entry's address.  bits is the
+   requested root table index bits, and on return it is the actual root
+   table index bits.  It will differ if the request is greater than the
+   longest code or if it is less than the shortest code.
+ */
+int inflate_table(type, lens, codes, table, bits, work)
+codetype type;
+unsigned short FAR *lens;
+unsigned codes;
+code FAR * FAR *table;
+unsigned FAR *bits;
+unsigned short FAR *work;
+{
+    unsigned len;               /* a code's length in bits */
+    unsigned sym;               /* index of code symbols */
+    unsigned min, max;          /* minimum and maximum code lengths */
+    unsigned root;              /* number of index bits for root table */
+    unsigned curr;              /* number of index bits for current table */
+    unsigned drop;              /* code bits to drop for sub-table */
+    int left;                   /* number of prefix codes available */
+    unsigned used;              /* code entries in table used */
+    unsigned huff;              /* Huffman code */
+    unsigned incr;              /* for incrementing code, index */
+    unsigned fill;              /* index for replicating entries */
+    unsigned low;               /* low bits for current root entry */
+    unsigned mask;              /* mask for low root bits */
+    code this;                  /* table entry for duplication */
+    code FAR *next;             /* next available space in table */
+    const unsigned short FAR *base;     /* base value table to use */
+    const unsigned short FAR *extra;    /* extra bits table to use */
+    int end;                    /* use base and extra for symbol > end */
+    unsigned short count[MAXBITS+1];    /* number of codes of each length */
+    unsigned short offs[MAXBITS+1];     /* offsets in table for each length */
+    static const unsigned short lbase[31] = { /* Length codes 257..285 base */
+        3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
+        35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
+    static const unsigned short lext[31] = { /* Length codes 257..285 extra */
+        16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
+        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 201, 196};
+    static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
+        1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
+        257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
+        8193, 12289, 16385, 24577, 0, 0};
+    static const unsigned short dext[32] = { /* Distance codes 0..29 extra */
+        16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
+        23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
+        28, 28, 29, 29, 64, 64};
+
+    /*
+       Process a set of code lengths to create a canonical Huffman code.  The
+       code lengths are lens[0..codes-1].  Each length corresponds to the
+       symbols 0..codes-1.  The Huffman code is generated by first sorting the
+       symbols by length from short to long, and retaining the symbol order
+       for codes with equal lengths.  Then the code starts with all zero bits
+       for the first code of the shortest length, and the codes are integer
+       increments for the same length, and zeros are appended as the length
+       increases.  For the deflate format, these bits are stored backwards
+       from their more natural integer increment ordering, and so when the
+       decoding tables are built in the large loop below, the integer codes
+       are incremented backwards.
+
+       This routine assumes, but does not check, that all of the entries in
+       lens[] are in the range 0..MAXBITS.  The caller must assure this.
+       1..MAXBITS is interpreted as that code length.  zero means that that
+       symbol does not occur in this code.
+
+       The codes are sorted by computing a count of codes for each length,
+       creating from that a table of starting indices for each length in the
+       sorted table, and then entering the symbols in order in the sorted
+       table.  The sorted table is work[], with that space being provided by
+       the caller.
+
+       The length counts are used for other purposes as well, i.e. finding
+       the minimum and maximum length codes, determining if there are any
+       codes at all, checking for a valid set of lengths, and looking ahead
+       at length counts to determine sub-table sizes when building the
+       decoding tables.
+     */
+
+    /* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
+    for (len = 0; len <= MAXBITS; len++)
+        count[len] = 0;
+    for (sym = 0; sym < codes; sym++)
+        count[lens[sym]]++;
+
+    /* bound code lengths, force root to be within code lengths */
+    root = *bits;
+    for (max = MAXBITS; max >= 1; max--)
+        if (count[max] != 0) break;
+    if (root > max) root = max;
+    if (max == 0) {                     /* no symbols to code at all */
+        this.op = (unsigned char)64;    /* invalid code marker */
+        this.bits = (unsigned char)1;
+        this.val = (unsigned short)0;
+        *(*table)++ = this;             /* make a table to force an error */
+        *(*table)++ = this;
+        *bits = 1;
+        return 0;     /* no symbols, but wait for decoding to report error */
+    }
+    for (min = 1; min <= MAXBITS; min++)
+        if (count[min] != 0) break;
+    if (root < min) root = min;
+
+    /* check for an over-subscribed or incomplete set of lengths */
+    left = 1;
+    for (len = 1; len <= MAXBITS; len++) {
+        left <<= 1;
+        left -= count[len];
+        if (left < 0) return -1;        /* over-subscribed */
+    }
+    if (left > 0 && (type == CODES || max != 1))
+        return -1;                      /* incomplete set */
+
+    /* generate offsets into symbol table for each length for sorting */
+    offs[1] = 0;
+    for (len = 1; len < MAXBITS; len++)
+        offs[len + 1] = offs[len] + count[len];
+
+    /* sort symbols by length, by symbol order within each length */
+    for (sym = 0; sym < codes; sym++)
+        if (lens[sym] != 0) work[offs[lens[sym]]++] = (unsigned short)sym;
+
+    /*
+       Create and fill in decoding tables.  In this loop, the table being
+       filled is at next and has curr index bits.  The code being used is huff
+       with length len.  That code is converted to an index by dropping drop
+       bits off of the bottom.  For codes where len is less than drop + curr,
+       those top drop + curr - len bits are incremented through all values to
+       fill the table with replicated entries.
+
+       root is the number of index bits for the root table.  When len exceeds
+       root, sub-tables are created pointed to by the root entry with an index
+       of the low root bits of huff.  This is saved in low to check for when a
+       new sub-table should be started.  drop is zero when the root table is
+       being filled, and drop is root when sub-tables are being filled.
+
+       When a new sub-table is needed, it is necessary to look ahead in the
+       code lengths to determine what size sub-table is needed.  The length
+       counts are used for this, and so count[] is decremented as codes are
+       entered in the tables.
+
+       used keeps track of how many table entries have been allocated from the
+       provided *table space.  It is checked when a LENS table is being made
+       against the space in *table, ENOUGH, minus the maximum space needed by
+       the worst case distance code, MAXD.  This should never happen, but the
+       sufficiency of ENOUGH has not been proven exhaustively, hence the check.
+       This assumes that when type == LENS, bits == 9.
+
+       sym increments through all symbols, and the loop terminates when
+       all codes of length max, i.e. all codes, have been processed.  This
+       routine permits incomplete codes, so another loop after this one fills
+       in the rest of the decoding tables with invalid code markers.
+     */
+
+    /* set up for code type */
+    switch (type) {
+    case CODES:
+        base = extra = work;    /* dummy value--not used */
+        end = 19;
+        break;
+    case LENS:
+        base = lbase;
+        base -= 257;
+        extra = lext;
+        extra -= 257;
+        end = 256;
+        break;
+    default:            /* DISTS */
+        base = dbase;
+        extra = dext;
+        end = -1;
+    }
+
+    /* initialize state for loop */
+    huff = 0;                   /* starting code */
+    sym = 0;                    /* starting code symbol */
+    len = min;                  /* starting code length */
+    next = *table;              /* current table to fill in */
+    curr = root;                /* current table index bits */
+    drop = 0;                   /* current bits to drop from code for index */
+    low = (unsigned)(-1);       /* trigger new sub-table when len > root */
+    used = 1U << root;          /* use root table entries */
+    mask = used - 1;            /* mask for comparing low */
+
+    /* check available table space */
+    if (type == LENS && used >= ENOUGH - MAXD)
+        return 1;
+
+    /* process all codes and make table entries */
+    for (;;) {
+        /* create table entry */
+        this.bits = (unsigned char)(len - drop);
+        if ((int)(work[sym]) < end) {
+            this.op = (unsigned char)0;
+            this.val = work[sym];
+        }
+        else if ((int)(work[sym]) > end) {
+            this.op = (unsigned char)(extra[work[sym]]);
+            this.val = base[work[sym]];
+        }
+        else {
+            this.op = (unsigned char)(32 + 64);         /* end of block */
+            this.val = 0;
+        }
+
+        /* replicate for those indices with low len bits equal to huff */
+        incr = 1U << (len - drop);
+        fill = 1U << curr;
+        min = fill;                 /* save offset to next table */
+        do {
+            fill -= incr;
+            next[(huff >> drop) + fill] = this;
+        } while (fill != 0);
+
+        /* backwards increment the len-bit code huff */
+        incr = 1U << (len - 1);
+        while (huff & incr)
+            incr >>= 1;
+        if (incr != 0) {
+            huff &= incr - 1;
+            huff += incr;
+        }
+        else
+            huff = 0;
+
+        /* go to next symbol, update count, len */
+        sym++;
+        if (--(count[len]) == 0) {
+            if (len == max) break;
+            len = lens[work[sym]];
+        }
+
+        /* create new sub-table if needed */
+        if (len > root && (huff & mask) != low) {
+            /* if first time, transition to sub-tables */
+            if (drop == 0)
+                drop = root;
+
+            /* increment past last table */
+            next += min;            /* here min is 1 << curr */
+
+            /* determine length of next table */
+            curr = len - drop;
+            left = (int)(1 << curr);
+            while (curr + drop < max) {
+                left -= count[curr + drop];
+                if (left <= 0) break;
+                curr++;
+                left <<= 1;
+            }
+
+            /* check for enough space */
+            used += 1U << curr;
+            if (type == LENS && used >= ENOUGH - MAXD)
+                return 1;
+
+            /* point entry in root table to sub-table */
+            low = huff & mask;
+            (*table)[low].op = (unsigned char)curr;
+            (*table)[low].bits = (unsigned char)root;
+            (*table)[low].val = (unsigned short)(next - *table);
+        }
+    }
+
+    /*
+       Fill in rest of table for incomplete codes.  This loop is similar to the
+       loop above in incrementing huff for table indices.  It is assumed that
+       len is equal to curr + drop, so there is no loop needed to increment
+       through high index bits.  When the current sub-table is filled, the loop
+       drops back to the root table to fill in any remaining entries there.
+     */
+    this.op = (unsigned char)64;                /* invalid code marker */
+    this.bits = (unsigned char)(len - drop);
+    this.val = (unsigned short)0;
+    while (huff != 0) {
+        /* when done with sub-table, drop back to root table */
+        if (drop != 0 && (huff & mask) != low) {
+            drop = 0;
+            len = root;
+            next = *table;
+            this.bits = (unsigned char)len;
+        }
+
+        /* put invalid code marker in table */
+        next[huff >> drop] = this;
+
+        /* backwards increment the len-bit code huff */
+        incr = 1U << (len - 1);
+        while (huff & incr)
+            incr >>= 1;
+        if (incr != 0) {
+            huff &= incr - 1;
+            huff += incr;
+        }
+        else
+            huff = 0;
+    }
+
+    /* set return parameters */
+    *table += used;
+    *bits = root;
+    return 0;
+}
diff --git a/uts/common/zmod/inftrees.h b/uts/common/zmod/inftrees.h
new file mode 100644
index 000000000000..546e8c082fdb
--- /dev/null
+++ b/uts/common/zmod/inftrees.h
@@ -0,0 +1,57 @@
+/* inftrees.h -- header to use inftrees.c
+ * Copyright (C) 1995-2005 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+/* Structure for decoding tables.  Each entry provides either the
+   information needed to do the operation requested by the code that
+   indexed that table entry, or it provides a pointer to another
+   table that indexes more bits of the code.  op indicates whether
+   the entry is a pointer to another table, a literal, a length or
+   distance, an end-of-block, or an invalid code.  For a table
+   pointer, the low four bits of op is the number of index bits of
+   that table.  For a length or distance, the low four bits of op
+   is the number of extra bits to get after the code.  bits is
+   the number of bits in this code or part of the code to drop off
+   of the bit buffer.  val is the actual byte to output in the case
+   of a literal, the base length or distance, or the offset from
+   the current table to the next table.  Each entry is four bytes. */
+typedef struct {
+    unsigned char op;           /* operation, extra bits, table bits */
+    unsigned char bits;         /* bits in this part of the code */
+    unsigned short val;         /* offset in table or code value */
+} code;
+
+/* op values as set by inflate_table():
+    00000000 - literal
+    0000tttt - table link, tttt != 0 is the number of table index bits
+    0001eeee - length or distance, eeee is the number of extra bits
+    01100000 - end of block
+    01000000 - invalid code
+ */
+
+/* Maximum size of dynamic tree.  The maximum found in a long but non-
+   exhaustive search was 1444 code structures (852 for length/literals
+   and 592 for distances, the latter actually the result of an
+   exhaustive search).  The true maximum is not known, but the value
+   below is more than safe. */
+#define ENOUGH 2048
+#define MAXD 592
+
+/* Type of code to build for inftable() */
+typedef enum {
+    CODES,
+    LENS,
+    DISTS
+} codetype;
+
+extern int inflate_table OF((codetype type, unsigned short FAR *lens,
+                             unsigned codes, code FAR * FAR *table,
+                             unsigned FAR *bits, unsigned short FAR *work));
diff --git a/uts/common/zmod/trees.c b/uts/common/zmod/trees.c
new file mode 100644
index 000000000000..ce0cebc0304c
--- /dev/null
+++ b/uts/common/zmod/trees.c
@@ -0,0 +1,1219 @@
+/* trees.c -- output deflated data using Huffman coding
+ * Copyright (C) 1995-2005 Jean-loup Gailly
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ *  ALGORITHM
+ *
+ *      The "deflation" process uses several Huffman trees. The more
+ *      common source values are represented by shorter bit sequences.
+ *
+ *      Each code tree is stored in a compressed form which is itself
+ * a Huffman encoding of the lengths of all the code strings (in
+ * ascending order by source values).  The actual code strings are
+ * reconstructed from the lengths in the inflate process, as described
+ * in the deflate specification.
+ *
+ *  REFERENCES
+ *
+ *      Deutsch, L.P.,"'Deflate' Compressed Data Format Specification".
+ *      Available in ftp.uu.net:/pub/archiving/zip/doc/deflate-1.1.doc
+ *
+ *      Storer, James A.
+ *          Data Compression:  Methods and Theory, pp. 49-50.
+ *          Computer Science Press, 1988.  ISBN 0-7167-8156-5.
+ *
+ *      Sedgewick, R.
+ *          Algorithms, p290.
+ *          Addison-Wesley, 1983. ISBN 0-201-06672-6.
+ */
+
+/* #define GEN_TREES_H */
+
+#include "deflate.h"
+
+#ifdef DEBUG
+#  include <ctype.h>
+#endif
+
+/* ===========================================================================
+ * Constants
+ */
+
+#define MAX_BL_BITS 7
+/* Bit length codes must not exceed MAX_BL_BITS bits */
+
+#define END_BLOCK 256
+/* end of block literal code */
+
+#define REP_3_6      16
+/* repeat previous bit length 3-6 times (2 bits of repeat count) */
+
+#define REPZ_3_10    17
+/* repeat a zero length 3-10 times  (3 bits of repeat count) */
+
+#define REPZ_11_138  18
+/* repeat a zero length 11-138 times  (7 bits of repeat count) */
+
+local const int extra_lbits[LENGTH_CODES] /* extra bits for each length code */
+   = {0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0};
+
+local const int extra_dbits[D_CODES] /* extra bits for each distance code */
+   = {0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
+
+local const int extra_blbits[BL_CODES]/* extra bits for each bit length code */
+   = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7};
+
+local const uch bl_order[BL_CODES]
+   = {16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15};
+/* The lengths of the bit length codes are sent in order of decreasing
+ * probability, to avoid transmitting the lengths for unused bit length codes.
+ */
+
+#define Buf_size (8 * 2*sizeof(char))
+/* Number of bits used within bi_buf. (bi_buf might be implemented on
+ * more than 16 bits on some systems.)
+ */
+
+/* ===========================================================================
+ * Local data. These are initialized only once.
+ */
+
+#define DIST_CODE_LEN  512 /* see definition of array dist_code below */
+
+#if defined(GEN_TREES_H) || !defined(STDC)
+/* non ANSI compilers may not accept trees.h */
+
+local ct_data static_ltree[L_CODES+2];
+/* The static literal tree. Since the bit lengths are imposed, there is no
+ * need for the L_CODES extra codes used during heap construction. However
+ * The codes 286 and 287 are needed to build a canonical tree (see _tr_init
+ * below).
+ */
+
+local ct_data static_dtree[D_CODES];
+/* The static distance tree. (Actually a trivial tree since all codes use
+ * 5 bits.)
+ */
+
+uch _dist_code[DIST_CODE_LEN];
+/* Distance codes. The first 256 values correspond to the distances
+ * 3 .. 258, the last 256 values correspond to the top 8 bits of
+ * the 15 bit distances.
+ */
+
+uch _length_code[MAX_MATCH-MIN_MATCH+1];
+/* length code for each normalized match length (0 == MIN_MATCH) */
+
+local int base_length[LENGTH_CODES];
+/* First normalized length for each code (0 = MIN_MATCH) */
+
+local int base_dist[D_CODES];
+/* First normalized distance for each code (0 = distance of 1) */
+
+#else
+#  include "trees.h"
+#endif /* GEN_TREES_H */
+
+struct static_tree_desc_s {
+    const ct_data *static_tree;  /* static tree or NULL */
+    const intf *extra_bits;      /* extra bits for each code or NULL */
+    int     extra_base;          /* base index for extra_bits */
+    int     elems;               /* max number of elements in the tree */
+    int     max_length;          /* max bit length for the codes */
+};
+
+local static_tree_desc  static_l_desc =
+{static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS};
+
+local static_tree_desc  static_d_desc =
+{static_dtree, extra_dbits, 0,          D_CODES, MAX_BITS};
+
+local static_tree_desc  static_bl_desc =
+{(const ct_data *)0, extra_blbits, 0,   BL_CODES, MAX_BL_BITS};
+
+/* ===========================================================================
+ * Local (static) routines in this file.
+ */
+
+local void tr_static_init OF((void));
+local void init_block     OF((deflate_state *s));
+local void pqdownheap     OF((deflate_state *s, ct_data *tree, int k));
+local void gen_bitlen     OF((deflate_state *s, tree_desc *desc));
+local void gen_codes      OF((ct_data *tree, int max_code, ushf *bl_count));
+local void build_tree     OF((deflate_state *s, tree_desc *desc));
+local void scan_tree      OF((deflate_state *s, ct_data *tree, int max_code));
+local void send_tree      OF((deflate_state *s, ct_data *tree, int max_code));
+local int  build_bl_tree  OF((deflate_state *s));
+local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes,
+                              int blcodes));
+local void compress_block OF((deflate_state *s, ct_data *ltree,
+                              ct_data *dtree));
+local void set_data_type  OF((deflate_state *s));
+local unsigned bi_reverse OF((unsigned value, int length));
+local void bi_windup      OF((deflate_state *s));
+local void bi_flush       OF((deflate_state *s));
+local void copy_block     OF((deflate_state *s, charf *buf, unsigned len,
+                              int header));
+
+#ifdef GEN_TREES_H
+local void gen_trees_header OF((void));
+#endif
+
+#ifndef DEBUG
+#  define send_code(s, c, tree) send_bits(s, tree[c].Code, tree[c].Len)
+   /* Send a code of the given tree. c and tree must not have side effects */
+
+#else /* DEBUG */
+#  define send_code(s, c, tree) \
+     { if (z_verbose>2) fprintf(stderr,"\ncd %3d ",(c)); \
+       send_bits(s, tree[c].Code, tree[c].Len); }
+#endif
+
+/* ===========================================================================
+ * Output a short LSB first on the stream.
+ * IN assertion: there is enough room in pendingBuf.
+ */
+#define put_short(s, w) { \
+    put_byte(s, (uch)((w) & 0xff)); \
+    put_byte(s, (uch)((ush)(w) >> 8)); \
+}
+
+/* ===========================================================================
+ * Send a value on a given number of bits.
+ * IN assertion: length <= 16 and value fits in length bits.
+ */
+#ifdef DEBUG
+local void send_bits      OF((deflate_state *s, int value, int length));
+
+local void send_bits(s, value, length)
+    deflate_state *s;
+    int value;  /* value to send */
+    int length; /* number of bits */
+{
+    Tracevv((stderr," l %2d v %4x ", length, value));
+    Assert(length > 0 && length <= 15, "invalid length");
+    s->bits_sent += (ulg)length;
+
+    /* If not enough room in bi_buf, use (valid) bits from bi_buf and
+     * (16 - bi_valid) bits from value, leaving (width - (16-bi_valid))
+     * unused bits in value.
+     */
+    if (s->bi_valid > (int)Buf_size - length) {
+        s->bi_buf |= (value << s->bi_valid);
+        put_short(s, s->bi_buf);
+        s->bi_buf = (ush)value >> (Buf_size - s->bi_valid);
+        s->bi_valid += length - Buf_size;
+    } else {
+        s->bi_buf |= value << s->bi_valid;
+        s->bi_valid += length;
+    }
+}
+#else /* !DEBUG */
+
+#define send_bits(s, value, length) \
+{ int len = length;\
+  if (s->bi_valid > (int)Buf_size - len) {\
+    int val = value;\
+    s->bi_buf |= (val << s->bi_valid);\
+    put_short(s, s->bi_buf);\
+    s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\
+    s->bi_valid += len - Buf_size;\
+  } else {\
+    s->bi_buf |= (value) << s->bi_valid;\
+    s->bi_valid += len;\
+  }\
+}
+#endif /* DEBUG */
+
+
+/* the arguments must not have side effects */
+
+/* ===========================================================================
+ * Initialize the various 'constant' tables.
+ */
+local void tr_static_init()
+{
+#if defined(GEN_TREES_H) || !defined(STDC)
+    static int static_init_done = 0;
+    int n;        /* iterates over tree elements */
+    int bits;     /* bit counter */
+    int length;   /* length value */
+    int code;     /* code value */
+    int dist;     /* distance index */
+    ush bl_count[MAX_BITS+1];
+    /* number of codes at each bit length for an optimal tree */
+
+    if (static_init_done) return;
+
+    /* For some embedded targets, global variables are not initialized: */
+    static_l_desc.static_tree = static_ltree;
+    static_l_desc.extra_bits = extra_lbits;
+    static_d_desc.static_tree = static_dtree;
+    static_d_desc.extra_bits = extra_dbits;
+    static_bl_desc.extra_bits = extra_blbits;
+
+    /* Initialize the mapping length (0..255) -> length code (0..28) */
+    length = 0;
+    for (code = 0; code < LENGTH_CODES-1; code++) {
+        base_length[code] = length;
+        for (n = 0; n < (1<<extra_lbits[code]); n++) {
+            _length_code[length++] = (uch)code;
+        }
+    }
+    Assert (length == 256, "tr_static_init: length != 256");
+    /* Note that the length 255 (match length 258) can be represented
+     * in two different ways: code 284 + 5 bits or code 285, so we
+     * overwrite length_code[255] to use the best encoding:
+     */
+    _length_code[length-1] = (uch)code;
+
+    /* Initialize the mapping dist (0..32K) -> dist code (0..29) */
+    dist = 0;
+    for (code = 0 ; code < 16; code++) {
+        base_dist[code] = dist;
+        for (n = 0; n < (1<<extra_dbits[code]); n++) {
+            _dist_code[dist++] = (uch)code;
+        }
+    }
+    Assert (dist == 256, "tr_static_init: dist != 256");
+    dist >>= 7; /* from now on, all distances are divided by 128 */
+    for ( ; code < D_CODES; code++) {
+        base_dist[code] = dist << 7;
+        for (n = 0; n < (1<<(extra_dbits[code]-7)); n++) {
+            _dist_code[256 + dist++] = (uch)code;
+        }
+    }
+    Assert (dist == 256, "tr_static_init: 256+dist != 512");
+
+    /* Construct the codes of the static literal tree */
+    for (bits = 0; bits <= MAX_BITS; bits++) bl_count[bits] = 0;
+    n = 0;
+    while (n <= 143) static_ltree[n++].Len = 8, bl_count[8]++;
+    while (n <= 255) static_ltree[n++].Len = 9, bl_count[9]++;
+    while (n <= 279) static_ltree[n++].Len = 7, bl_count[7]++;
+    while (n <= 287) static_ltree[n++].Len = 8, bl_count[8]++;
+    /* Codes 286 and 287 do not exist, but we must include them in the
+     * tree construction to get a canonical Huffman tree (longest code
+     * all ones)
+     */
+    gen_codes((ct_data *)static_ltree, L_CODES+1, bl_count);
+
+    /* The static distance tree is trivial: */
+    for (n = 0; n < D_CODES; n++) {
+        static_dtree[n].Len = 5;
+        static_dtree[n].Code = bi_reverse((unsigned)n, 5);
+    }
+    static_init_done = 1;
+
+#  ifdef GEN_TREES_H
+    gen_trees_header();
+#  endif
+#endif /* defined(GEN_TREES_H) || !defined(STDC) */
+}
+
+/* ===========================================================================
+ * Genererate the file trees.h describing the static trees.
+ */
+#ifdef GEN_TREES_H
+#  ifndef DEBUG
+#    include <stdio.h>
+#  endif
+
+#  define SEPARATOR(i, last, width) \
+      ((i) == (last)? "\n};\n\n" :    \
+       ((i) % (width) == (width)-1 ? ",\n" : ", "))
+
+void gen_trees_header()
+{
+    FILE *header = fopen("trees.h", "w");
+    int i;
+
+    Assert (header != NULL, "Can't open trees.h");
+    fprintf(header,
+            "/* header created automatically with -DGEN_TREES_H */\n\n");
+
+    fprintf(header, "local const ct_data static_ltree[L_CODES+2] = {\n");
+    for (i = 0; i < L_CODES+2; i++) {
+        fprintf(header, "{{%3u},{%3u}}%s", static_ltree[i].Code,
+                static_ltree[i].Len, SEPARATOR(i, L_CODES+1, 5));
+    }
+
+    fprintf(header, "local const ct_data static_dtree[D_CODES] = {\n");
+    for (i = 0; i < D_CODES; i++) {
+        fprintf(header, "{{%2u},{%2u}}%s", static_dtree[i].Code,
+                static_dtree[i].Len, SEPARATOR(i, D_CODES-1, 5));
+    }
+
+    fprintf(header, "const uch _dist_code[DIST_CODE_LEN] = {\n");
+    for (i = 0; i < DIST_CODE_LEN; i++) {
+        fprintf(header, "%2u%s", _dist_code[i],
+                SEPARATOR(i, DIST_CODE_LEN-1, 20));
+    }
+
+    fprintf(header, "const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {\n");
+    for (i = 0; i < MAX_MATCH-MIN_MATCH+1; i++) {
+        fprintf(header, "%2u%s", _length_code[i],
+                SEPARATOR(i, MAX_MATCH-MIN_MATCH, 20));
+    }
+
+    fprintf(header, "local const int base_length[LENGTH_CODES] = {\n");
+    for (i = 0; i < LENGTH_CODES; i++) {
+        fprintf(header, "%1u%s", base_length[i],
+                SEPARATOR(i, LENGTH_CODES-1, 20));
+    }
+
+    fprintf(header, "local const int base_dist[D_CODES] = {\n");
+    for (i = 0; i < D_CODES; i++) {
+        fprintf(header, "%5u%s", base_dist[i],
+                SEPARATOR(i, D_CODES-1, 10));
+    }
+
+    fclose(header);
+}
+#endif /* GEN_TREES_H */
+
+/* ===========================================================================
+ * Initialize the tree data structures for a new zlib stream.
+ */
+void _tr_init(s)
+    deflate_state *s;
+{
+    tr_static_init();
+
+    s->l_desc.dyn_tree = s->dyn_ltree;
+    s->l_desc.stat_desc = &static_l_desc;
+
+    s->d_desc.dyn_tree = s->dyn_dtree;
+    s->d_desc.stat_desc = &static_d_desc;
+
+    s->bl_desc.dyn_tree = s->bl_tree;
+    s->bl_desc.stat_desc = &static_bl_desc;
+
+    s->bi_buf = 0;
+    s->bi_valid = 0;
+    s->last_eob_len = 8; /* enough lookahead for inflate */
+#ifdef DEBUG
+    s->compressed_len = 0L;
+    s->bits_sent = 0L;
+#endif
+
+    /* Initialize the first block of the first file: */
+    init_block(s);
+}
+
+/* ===========================================================================
+ * Initialize a new block.
+ */
+local void init_block(s)
+    deflate_state *s;
+{
+    int n; /* iterates over tree elements */
+
+    /* Initialize the trees. */
+    for (n = 0; n < L_CODES;  n++) s->dyn_ltree[n].Freq = 0;
+    for (n = 0; n < D_CODES;  n++) s->dyn_dtree[n].Freq = 0;
+    for (n = 0; n < BL_CODES; n++) s->bl_tree[n].Freq = 0;
+
+    s->dyn_ltree[END_BLOCK].Freq = 1;
+    s->opt_len = s->static_len = 0L;
+    s->last_lit = s->matches = 0;
+}
+
+#define SMALLEST 1
+/* Index within the heap array of least frequent node in the Huffman tree */
+
+
+/* ===========================================================================
+ * Remove the smallest element from the heap and recreate the heap with
+ * one less element. Updates heap and heap_len.
+ */
+#define pqremove(s, tree, top) \
+{\
+    top = s->heap[SMALLEST]; \
+    s->heap[SMALLEST] = s->heap[s->heap_len--]; \
+    pqdownheap(s, tree, SMALLEST); \
+}
+
+/* ===========================================================================
+ * Compares to subtrees, using the tree depth as tie breaker when
+ * the subtrees have equal frequency. This minimizes the worst case length.
+ */
+#define smaller(tree, n, m, depth) \
+   (tree[n].Freq < tree[m].Freq || \
+   (tree[n].Freq == tree[m].Freq && depth[n] <= depth[m]))
+
+/* ===========================================================================
+ * Restore the heap property by moving down the tree starting at node k,
+ * exchanging a node with the smallest of its two sons if necessary, stopping
+ * when the heap property is re-established (each father smaller than its
+ * two sons).
+ */
+local void pqdownheap(s, tree, k)
+    deflate_state *s;
+    ct_data *tree;  /* the tree to restore */
+    int k;               /* node to move down */
+{
+    int v = s->heap[k];
+    int j = k << 1;  /* left son of k */
+    while (j <= s->heap_len) {
+        /* Set j to the smallest of the two sons: */
+        if (j < s->heap_len &&
+            smaller(tree, s->heap[j+1], s->heap[j], s->depth)) {
+            j++;
+        }
+        /* Exit if v is smaller than both sons */
+        if (smaller(tree, v, s->heap[j], s->depth)) break;
+
+        /* Exchange v with the smallest son */
+        s->heap[k] = s->heap[j];  k = j;
+
+        /* And continue down the tree, setting j to the left son of k */
+        j <<= 1;
+    }
+    s->heap[k] = v;
+}
+
+/* ===========================================================================
+ * Compute the optimal bit lengths for a tree and update the total bit length
+ * for the current block.
+ * IN assertion: the fields freq and dad are set, heap[heap_max] and
+ *    above are the tree nodes sorted by increasing frequency.
+ * OUT assertions: the field len is set to the optimal bit length, the
+ *     array bl_count contains the frequencies for each bit length.
+ *     The length opt_len is updated; static_len is also updated if stree is
+ *     not null.
+ */
+local void gen_bitlen(s, desc)
+    deflate_state *s;
+    tree_desc *desc;    /* the tree descriptor */
+{
+    ct_data *tree        = desc->dyn_tree;
+    int max_code         = desc->max_code;
+    const ct_data *stree = desc->stat_desc->static_tree;
+    const intf *extra    = desc->stat_desc->extra_bits;
+    int base             = desc->stat_desc->extra_base;
+    int max_length       = desc->stat_desc->max_length;
+    int h;              /* heap index */
+    int n, m;           /* iterate over the tree elements */
+    int bits;           /* bit length */
+    int xbits;          /* extra bits */
+    ush f;              /* frequency */
+    int overflow = 0;   /* number of elements with bit length too large */
+
+    for (bits = 0; bits <= MAX_BITS; bits++) s->bl_count[bits] = 0;
+
+    /* In a first pass, compute the optimal bit lengths (which may
+     * overflow in the case of the bit length tree).
+     */
+    tree[s->heap[s->heap_max]].Len = 0; /* root of the heap */
+
+    for (h = s->heap_max+1; h < HEAP_SIZE; h++) {
+        n = s->heap[h];
+        bits = tree[tree[n].Dad].Len + 1;
+        if (bits > max_length) bits = max_length, overflow++;
+        tree[n].Len = (ush)bits;
+        /* We overwrite tree[n].Dad which is no longer needed */
+
+        if (n > max_code) continue; /* not a leaf node */
+
+        s->bl_count[bits]++;
+        xbits = 0;
+        if (n >= base) xbits = extra[n-base];
+        f = tree[n].Freq;
+        s->opt_len += (ulg)f * (bits + xbits);
+        if (stree) s->static_len += (ulg)f * (stree[n].Len + xbits);
+    }
+    if (overflow == 0) return;
+
+    Trace((stderr,"\nbit length overflow\n"));
+    /* This happens for example on obj2 and pic of the Calgary corpus */
+
+    /* Find the first bit length which could increase: */
+    do {
+        bits = max_length-1;
+        while (s->bl_count[bits] == 0) bits--;
+        s->bl_count[bits]--;      /* move one leaf down the tree */
+        s->bl_count[bits+1] += 2; /* move one overflow item as its brother */
+        s->bl_count[max_length]--;
+        /* The brother of the overflow item also moves one step up,
+         * but this does not affect bl_count[max_length]
+         */
+        overflow -= 2;
+    } while (overflow > 0);
+
+    /* Now recompute all bit lengths, scanning in increasing frequency.
+     * h is still equal to HEAP_SIZE. (It is simpler to reconstruct all
+     * lengths instead of fixing only the wrong ones. This idea is taken
+     * from 'ar' written by Haruhiko Okumura.)
+     */
+    for (bits = max_length; bits != 0; bits--) {
+        n = s->bl_count[bits];
+        while (n != 0) {
+            m = s->heap[--h];
+            if (m > max_code) continue;
+            if ((unsigned) tree[m].Len != (unsigned) bits) {
+                Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
+                s->opt_len += ((long)bits - (long)tree[m].Len)
+                              *(long)tree[m].Freq;
+                tree[m].Len = (ush)bits;
+            }
+            n--;
+        }
+    }
+}
+
+/* ===========================================================================
+ * Generate the codes for a given tree and bit counts (which need not be
+ * optimal).
+ * IN assertion: the array bl_count contains the bit length statistics for
+ * the given tree and the field len is set for all tree elements.
+ * OUT assertion: the field code is set for all tree elements of non
+ *     zero code length.
+ */
+local void gen_codes (tree, max_code, bl_count)
+    ct_data *tree;             /* the tree to decorate */
+    int max_code;              /* largest code with non zero frequency */
+    ushf *bl_count;            /* number of codes at each bit length */
+{
+    ush next_code[MAX_BITS+1]; /* next code value for each bit length */
+    ush code = 0;              /* running code value */
+    int bits;                  /* bit index */
+    int n;                     /* code index */
+
+    /* The distribution counts are first used to generate the code values
+     * without bit reversal.
+     */
+    for (bits = 1; bits <= MAX_BITS; bits++) {
+        next_code[bits] = code = (code + bl_count[bits-1]) << 1;
+    }
+    /* Check that the bit counts in bl_count are consistent. The last code
+     * must be all ones.
+     */
+    Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,
+            "inconsistent bit counts");
+    Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
+
+    for (n = 0;  n <= max_code; n++) {
+        int len = tree[n].Len;
+        if (len == 0) continue;
+        /* Now reverse the bits */
+        tree[n].Code = bi_reverse(next_code[len]++, len);
+
+        Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
+             n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
+    }
+}
+
+/* ===========================================================================
+ * Construct one Huffman tree and assigns the code bit strings and lengths.
+ * Update the total bit length for the current block.
+ * IN assertion: the field freq is set for all tree elements.
+ * OUT assertions: the fields len and code are set to the optimal bit length
+ *     and corresponding code. The length opt_len is updated; static_len is
+ *     also updated if stree is not null. The field max_code is set.
+ */
+local void build_tree(s, desc)
+    deflate_state *s;
+    tree_desc *desc; /* the tree descriptor */
+{
+    ct_data *tree         = desc->dyn_tree;
+    const ct_data *stree  = desc->stat_desc->static_tree;
+    int elems             = desc->stat_desc->elems;
+    int n, m;          /* iterate over heap elements */
+    int max_code = -1; /* largest code with non zero frequency */
+    int node;          /* new node being created */
+
+    /* Construct the initial heap, with least frequent element in
+     * heap[SMALLEST]. The sons of heap[n] are heap[2*n] and heap[2*n+1].
+     * heap[0] is not used.
+     */
+    s->heap_len = 0, s->heap_max = HEAP_SIZE;
+
+    for (n = 0; n < elems; n++) {
+        if (tree[n].Freq != 0) {
+            s->heap[++(s->heap_len)] = max_code = n;
+            s->depth[n] = 0;
+        } else {
+            tree[n].Len = 0;
+        }
+    }
+
+    /* The pkzip format requires that at least one distance code exists,
+     * and that at least one bit should be sent even if there is only one
+     * possible code. So to avoid special checks later on we force at least
+     * two codes of non zero frequency.
+     */
+    while (s->heap_len < 2) {
+        node = s->heap[++(s->heap_len)] = (max_code < 2 ? ++max_code : 0);
+        tree[node].Freq = 1;
+        s->depth[node] = 0;
+        s->opt_len--; if (stree) s->static_len -= stree[node].Len;
+        /* node is 0 or 1 so it does not have extra bits */
+    }
+    desc->max_code = max_code;
+
+    /* The elements heap[heap_len/2+1 .. heap_len] are leaves of the tree,
+     * establish sub-heaps of increasing lengths:
+     */
+    for (n = s->heap_len/2; n >= 1; n--) pqdownheap(s, tree, n);
+
+    /* Construct the Huffman tree by repeatedly combining the least two
+     * frequent nodes.
+     */
+    node = elems;              /* next internal node of the tree */
+    do {
+        pqremove(s, tree, n);  /* n = node of least frequency */
+        m = s->heap[SMALLEST]; /* m = node of next least frequency */
+
+        s->heap[--(s->heap_max)] = n; /* keep the nodes sorted by frequency */
+        s->heap[--(s->heap_max)] = m;
+
+        /* Create a new node father of n and m */
+        tree[node].Freq = tree[n].Freq + tree[m].Freq;
+        s->depth[node] = (uch)((s->depth[n] >= s->depth[m] ?
+                                s->depth[n] : s->depth[m]) + 1);
+        tree[n].Dad = tree[m].Dad = (ush)node;
+#ifdef DUMP_BL_TREE
+        if (tree == s->bl_tree) {
+            fprintf(stderr,"\nnode %d(%d), sons %d(%d) %d(%d)",
+                    node, tree[node].Freq, n, tree[n].Freq, m, tree[m].Freq);
+        }
+#endif
+        /* and insert the new node in the heap */
+        s->heap[SMALLEST] = node++;
+        pqdownheap(s, tree, SMALLEST);
+
+    } while (s->heap_len >= 2);
+
+    s->heap[--(s->heap_max)] = s->heap[SMALLEST];
+
+    /* At this point, the fields freq and dad are set. We can now
+     * generate the bit lengths.
+     */
+    gen_bitlen(s, (tree_desc *)desc);
+
+    /* The field len is now set, we can generate the bit codes */
+    gen_codes ((ct_data *)tree, max_code, s->bl_count);
+}
+
+/* ===========================================================================
+ * Scan a literal or distance tree to determine the frequencies of the codes
+ * in the bit length tree.
+ */
+local void scan_tree (s, tree, max_code)
+    deflate_state *s;
+    ct_data *tree;   /* the tree to be scanned */
+    int max_code;    /* and its largest code of non zero frequency */
+{
+    int n;                     /* iterates over all tree elements */
+    int prevlen = -1;          /* last emitted length */
+    int curlen;                /* length of current code */
+    int nextlen = tree[0].Len; /* length of next code */
+    int count = 0;             /* repeat count of the current code */
+    int max_count = 7;         /* max repeat count */
+    int min_count = 4;         /* min repeat count */
+
+    if (nextlen == 0) max_count = 138, min_count = 3;
+    tree[max_code+1].Len = (ush)0xffff; /* guard */
+
+    for (n = 0; n <= max_code; n++) {
+        curlen = nextlen; nextlen = tree[n+1].Len;
+        if (++count < max_count && curlen == nextlen) {
+            continue;
+        } else if (count < min_count) {
+            s->bl_tree[curlen].Freq += count;
+        } else if (curlen != 0) {
+            if (curlen != prevlen) s->bl_tree[curlen].Freq++;
+            s->bl_tree[REP_3_6].Freq++;
+        } else if (count <= 10) {
+            s->bl_tree[REPZ_3_10].Freq++;
+        } else {
+            s->bl_tree[REPZ_11_138].Freq++;
+        }
+        count = 0; prevlen = curlen;
+        if (nextlen == 0) {
+            max_count = 138, min_count = 3;
+        } else if (curlen == nextlen) {
+            max_count = 6, min_count = 3;
+        } else {
+            max_count = 7, min_count = 4;
+        }
+    }
+}
+
+/* ===========================================================================
+ * Send a literal or distance tree in compressed form, using the codes in
+ * bl_tree.
+ */
+local void send_tree (s, tree, max_code)
+    deflate_state *s;
+    ct_data *tree; /* the tree to be scanned */
+    int max_code;       /* and its largest code of non zero frequency */
+{
+    int n;                     /* iterates over all tree elements */
+    int prevlen = -1;          /* last emitted length */
+    int curlen;                /* length of current code */
+    int nextlen = tree[0].Len; /* length of next code */
+    int count = 0;             /* repeat count of the current code */
+    int max_count = 7;         /* max repeat count */
+    int min_count = 4;         /* min repeat count */
+
+    /* tree[max_code+1].Len = -1; */  /* guard already set */
+    if (nextlen == 0) max_count = 138, min_count = 3;
+
+    for (n = 0; n <= max_code; n++) {
+        curlen = nextlen; nextlen = tree[n+1].Len;
+        if (++count < max_count && curlen == nextlen) {
+            continue;
+        } else if (count < min_count) {
+            do { send_code(s, curlen, s->bl_tree); } while (--count != 0);
+
+        } else if (curlen != 0) {
+            if (curlen != prevlen) {
+                send_code(s, curlen, s->bl_tree); count--;
+            }
+            Assert(count >= 3 && count <= 6, " 3_6?");
+            send_code(s, REP_3_6, s->bl_tree); send_bits(s, count-3, 2);
+
+        } else if (count <= 10) {
+            send_code(s, REPZ_3_10, s->bl_tree); send_bits(s, count-3, 3);
+
+        } else {
+            send_code(s, REPZ_11_138, s->bl_tree); send_bits(s, count-11, 7);
+        }
+        count = 0; prevlen = curlen;
+        if (nextlen == 0) {
+            max_count = 138, min_count = 3;
+        } else if (curlen == nextlen) {
+            max_count = 6, min_count = 3;
+        } else {
+            max_count = 7, min_count = 4;
+        }
+    }
+}
+
+/* ===========================================================================
+ * Construct the Huffman tree for the bit lengths and return the index in
+ * bl_order of the last bit length code to send.
+ */
+local int build_bl_tree(s)
+    deflate_state *s;
+{
+    int max_blindex;  /* index of last bit length code of non zero freq */
+
+    /* Determine the bit length frequencies for literal and distance trees */
+    scan_tree(s, (ct_data *)s->dyn_ltree, s->l_desc.max_code);
+    scan_tree(s, (ct_data *)s->dyn_dtree, s->d_desc.max_code);
+
+    /* Build the bit length tree: */
+    build_tree(s, (tree_desc *)(&(s->bl_desc)));
+    /* opt_len now includes the length of the tree representations, except
+     * the lengths of the bit lengths codes and the 5+5+4 bits for the counts.
+     */
+
+    /* Determine the number of bit length codes to send. The pkzip format
+     * requires that at least 4 bit length codes be sent. (appnote.txt says
+     * 3 but the actual value used is 4.)
+     */
+    for (max_blindex = BL_CODES-1; max_blindex >= 3; max_blindex--) {
+        if (s->bl_tree[bl_order[max_blindex]].Len != 0) break;
+    }
+    /* Update opt_len to include the bit length tree and counts */
+    s->opt_len += 3*(max_blindex+1) + 5+5+4;
+    Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld",
+            s->opt_len, s->static_len));
+
+    return max_blindex;
+}
+
+/* ===========================================================================
+ * Send the header for a block using dynamic Huffman trees: the counts, the
+ * lengths of the bit length codes, the literal tree and the distance tree.
+ * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
+ */
+local void send_all_trees(s, lcodes, dcodes, blcodes)
+    deflate_state *s;
+    int lcodes, dcodes, blcodes; /* number of codes for each tree */
+{
+    int rank;                    /* index in bl_order */
+
+    Assert (lcodes >= 257 && dcodes >= 1 && blcodes >= 4, "not enough codes");
+    Assert (lcodes <= L_CODES && dcodes <= D_CODES && blcodes <= BL_CODES,
+            "too many codes");
+    Tracev((stderr, "\nbl counts: "));
+    send_bits(s, lcodes-257, 5); /* not +255 as stated in appnote.txt */
+    send_bits(s, dcodes-1,   5);
+    send_bits(s, blcodes-4,  4); /* not -3 as stated in appnote.txt */
+    for (rank = 0; rank < blcodes; rank++) {
+        Tracev((stderr, "\nbl code %2d ", bl_order[rank]));
+        send_bits(s, s->bl_tree[bl_order[rank]].Len, 3);
+    }
+    Tracev((stderr, "\nbl tree: sent %ld", s->bits_sent));
+
+    send_tree(s, (ct_data *)s->dyn_ltree, lcodes-1); /* literal tree */
+    Tracev((stderr, "\nlit tree: sent %ld", s->bits_sent));
+
+    send_tree(s, (ct_data *)s->dyn_dtree, dcodes-1); /* distance tree */
+    Tracev((stderr, "\ndist tree: sent %ld", s->bits_sent));
+}
+
+/* ===========================================================================
+ * Send a stored block
+ */
+void _tr_stored_block(s, buf, stored_len, eof)
+    deflate_state *s;
+    charf *buf;       /* input block */
+    ulg stored_len;   /* length of input block */
+    int eof;          /* true if this is the last block for a file */
+{
+    send_bits(s, (STORED_BLOCK<<1)+eof, 3);  /* send block type */
+#ifdef DEBUG
+    s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
+    s->compressed_len += (stored_len + 4) << 3;
+#endif
+    copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
+}
+
+/* ===========================================================================
+ * Send one empty static block to give enough lookahead for inflate.
+ * This takes 10 bits, of which 7 may remain in the bit buffer.
+ * The current inflate code requires 9 bits of lookahead. If the
+ * last two codes for the previous block (real code plus EOB) were coded
+ * on 5 bits or less, inflate may have only 5+3 bits of lookahead to decode
+ * the last real code. In this case we send two empty static blocks instead
+ * of one. (There are no problems if the previous block is stored or fixed.)
+ * To simplify the code, we assume the worst case of last real code encoded
+ * on one bit only.
+ */
+void _tr_align(s)
+    deflate_state *s;
+{
+    send_bits(s, STATIC_TREES<<1, 3);
+    send_code(s, END_BLOCK, static_ltree);
+#ifdef DEBUG
+    s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
+#endif
+    bi_flush(s);
+    /* Of the 10 bits for the empty block, we have already sent
+     * (10 - bi_valid) bits. The lookahead for the last real code (before
+     * the EOB of the previous block) was thus at least one plus the length
+     * of the EOB plus what we have just sent of the empty static block.
+     */
+    if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {
+        send_bits(s, STATIC_TREES<<1, 3);
+        send_code(s, END_BLOCK, static_ltree);
+#ifdef DEBUG
+        s->compressed_len += 10L;
+#endif
+        bi_flush(s);
+    }
+    s->last_eob_len = 7;
+}
+
+/* ===========================================================================
+ * Determine the best encoding for the current block: dynamic trees, static
+ * trees or store, and output the encoded block to the zip file.
+ */
+void _tr_flush_block(s, buf, stored_len, eof)
+    deflate_state *s;
+    charf *buf;       /* input block, or NULL if too old */
+    ulg stored_len;   /* length of input block */
+    int eof;          /* true if this is the last block for a file */
+{
+    ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */
+    int max_blindex = 0;  /* index of last bit length code of non zero freq */
+
+    /* Build the Huffman trees unless a stored block is forced */
+    if (s->level > 0) {
+
+        /* Check if the file is binary or text */
+        if (stored_len > 0 && s->strm->data_type == Z_UNKNOWN)
+            set_data_type(s);
+
+        /* Construct the literal and distance trees */
+        build_tree(s, (tree_desc *)(&(s->l_desc)));
+        Tracev((stderr, "\nlit data: dyn %ld, stat %ld", s->opt_len,
+                s->static_len));
+
+        build_tree(s, (tree_desc *)(&(s->d_desc)));
+        Tracev((stderr, "\ndist data: dyn %ld, stat %ld", s->opt_len,
+                s->static_len));
+        /* At this point, opt_len and static_len are the total bit lengths of
+         * the compressed block data, excluding the tree representations.
+         */
+
+        /* Build the bit length tree for the above two trees, and get the index
+         * in bl_order of the last bit length code to send.
+         */
+        max_blindex = build_bl_tree(s);
+
+        /* Determine the best encoding. Compute the block lengths in bytes. */
+        opt_lenb = (s->opt_len+3+7)>>3;
+        static_lenb = (s->static_len+3+7)>>3;
+
+        Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
+                opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
+                s->last_lit));
+
+        if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
+
+    } else {
+        Assert(buf != (char*)0, "lost buf");
+        opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
+    }
+
+#ifdef FORCE_STORED
+    if (buf != (char*)0) { /* force stored block */
+#else
+    if (stored_len+4 <= opt_lenb && buf != (char*)0) {
+                       /* 4: two words for the lengths */
+#endif
+        /* The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.
+         * Otherwise we can't have processed more than WSIZE input bytes since
+         * the last block flush, because compression would have been
+         * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
+         * transform a block into a stored block.
+         */
+        _tr_stored_block(s, buf, stored_len, eof);
+
+#ifdef FORCE_STATIC
+    } else if (static_lenb >= 0) { /* force static trees */
+#else
+    } else if (s->strategy == Z_FIXED || static_lenb == opt_lenb) {
+#endif
+        send_bits(s, (STATIC_TREES<<1)+eof, 3);
+        compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);
+#ifdef DEBUG
+        s->compressed_len += 3 + s->static_len;
+#endif
+    } else {
+        send_bits(s, (DYN_TREES<<1)+eof, 3);
+        send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1,
+                       max_blindex+1);
+        compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree);
+#ifdef DEBUG
+        s->compressed_len += 3 + s->opt_len;
+#endif
+    }
+    Assert (s->compressed_len == s->bits_sent, "bad compressed size");
+    /* The above check is made mod 2^32, for files larger than 512 MB
+     * and uLong implemented on 32 bits.
+     */
+    init_block(s);
+
+    if (eof) {
+        bi_windup(s);
+#ifdef DEBUG
+        s->compressed_len += 7;  /* align on byte boundary */
+#endif
+    }
+    Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
+           s->compressed_len-7*eof));
+}
+
+/* ===========================================================================
+ * Save the match info and tally the frequency counts. Return true if
+ * the current block must be flushed.
+ */
+int _tr_tally (s, dist, lc)
+    deflate_state *s;
+    unsigned dist;  /* distance of matched string */
+    unsigned lc;    /* match length-MIN_MATCH or unmatched char (if dist==0) */
+{
+    s->d_buf[s->last_lit] = (ush)dist;
+    s->l_buf[s->last_lit++] = (uch)lc;
+    if (dist == 0) {
+        /* lc is the unmatched char */
+        s->dyn_ltree[lc].Freq++;
+    } else {
+        s->matches++;
+        /* Here, lc is the match length - MIN_MATCH */
+        dist--;             /* dist = match distance - 1 */
+        Assert((ush)dist < (ush)MAX_DIST(s) &&
+               (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&
+               (ush)d_code(dist) < (ush)D_CODES,  "_tr_tally: bad match");
+
+        s->dyn_ltree[_length_code[lc]+LITERALS+1].Freq++;
+        s->dyn_dtree[d_code(dist)].Freq++;
+    }
+
+#ifdef TRUNCATE_BLOCK
+    /* Try to guess if it is profitable to stop the current block here */
+    if ((s->last_lit & 0x1fff) == 0 && s->level > 2) {
+        /* Compute an upper bound for the compressed length */
+        ulg out_length = (ulg)s->last_lit*8L;
+        ulg in_length = (ulg)((long)s->strstart - s->block_start);
+        int dcode;
+        for (dcode = 0; dcode < D_CODES; dcode++) {
+            out_length += (ulg)s->dyn_dtree[dcode].Freq *
+                (5L+extra_dbits[dcode]);
+        }
+        out_length >>= 3;
+        Tracev((stderr,"\nlast_lit %u, in %ld, out ~%ld(%ld%%) ",
+               s->last_lit, in_length, out_length,
+               100L - out_length*100L/in_length));
+        if (s->matches < s->last_lit/2 && out_length < in_length/2) return 1;
+    }
+#endif
+    return (s->last_lit == s->lit_bufsize-1);
+    /* We avoid equality with lit_bufsize because of wraparound at 64K
+     * on 16 bit machines and because stored blocks are restricted to
+     * 64K-1 bytes.
+     */
+}
+
+/* ===========================================================================
+ * Send the block data compressed using the given Huffman trees
+ */
+local void compress_block(s, ltree, dtree)
+    deflate_state *s;
+    ct_data *ltree; /* literal tree */
+    ct_data *dtree; /* distance tree */
+{
+    unsigned dist;      /* distance of matched string */
+    int lc;             /* match length or unmatched char (if dist == 0) */
+    unsigned lx = 0;    /* running index in l_buf */
+    unsigned code;      /* the code to send */
+    int extra;          /* number of extra bits to send */
+
+    if (s->last_lit != 0) do {
+        dist = s->d_buf[lx];
+        lc = s->l_buf[lx++];
+        if (dist == 0) {
+            send_code(s, lc, ltree); /* send a literal byte */
+            Tracecv(isgraph(lc), (stderr," '%c' ", lc));
+        } else {
+            /* Here, lc is the match length - MIN_MATCH */
+            code = _length_code[lc];
+            send_code(s, code+LITERALS+1, ltree); /* send the length code */
+            extra = extra_lbits[code];
+            if (extra != 0) {
+                lc -= base_length[code];
+                send_bits(s, lc, extra);       /* send the extra length bits */
+            }
+            dist--; /* dist is now the match distance - 1 */
+            code = d_code(dist);
+            Assert (code < D_CODES, "bad d_code");
+
+            send_code(s, code, dtree);       /* send the distance code */
+            extra = extra_dbits[code];
+            if (extra != 0) {
+                dist -= base_dist[code];
+                send_bits(s, dist, extra);   /* send the extra distance bits */
+            }
+        } /* literal or match pair ? */
+
+        /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
+        Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
+               "pendingBuf overflow");
+
+    } while (lx < s->last_lit);
+
+    send_code(s, END_BLOCK, ltree);
+    s->last_eob_len = ltree[END_BLOCK].Len;
+}
+
+/* ===========================================================================
+ * Set the data type to BINARY or TEXT, using a crude approximation:
+ * set it to Z_TEXT if all symbols are either printable characters (33 to 255)
+ * or white spaces (9 to 13, or 32); or set it to Z_BINARY otherwise.
+ * IN assertion: the fields Freq of dyn_ltree are set.
+ */
+local void set_data_type(s)
+    deflate_state *s;
+{
+    int n;
+
+    for (n = 0; n < 9; n++)
+        if (s->dyn_ltree[n].Freq != 0)
+            break;
+    if (n == 9)
+        for (n = 14; n < 32; n++)
+            if (s->dyn_ltree[n].Freq != 0)
+                break;
+    s->strm->data_type = (n == 32) ? Z_TEXT : Z_BINARY;
+}
+
+/* ===========================================================================
+ * Reverse the first len bits of a code, using straightforward code (a faster
+ * method would use a table)
+ * IN assertion: 1 <= len <= 15
+ */
+local unsigned bi_reverse(code, len)
+    unsigned code; /* the value to invert */
+    int len;       /* its bit length */
+{
+    register unsigned res = 0;
+    do {
+        res |= code & 1;
+        code >>= 1, res <<= 1;
+    } while (--len > 0);
+    return res >> 1;
+}
+
+/* ===========================================================================
+ * Flush the bit buffer, keeping at most 7 bits in it.
+ */
+local void bi_flush(s)
+    deflate_state *s;
+{
+    if (s->bi_valid == 16) {
+        put_short(s, s->bi_buf);
+        s->bi_buf = 0;
+        s->bi_valid = 0;
+    } else if (s->bi_valid >= 8) {
+        put_byte(s, (Byte)s->bi_buf);
+        s->bi_buf >>= 8;
+        s->bi_valid -= 8;
+    }
+}
+
+/* ===========================================================================
+ * Flush the bit buffer and align the output on a byte boundary
+ */
+local void bi_windup(s)
+    deflate_state *s;
+{
+    if (s->bi_valid > 8) {
+        put_short(s, s->bi_buf);
+    } else if (s->bi_valid > 0) {
+        put_byte(s, (Byte)s->bi_buf);
+    }
+    s->bi_buf = 0;
+    s->bi_valid = 0;
+#ifdef DEBUG
+    s->bits_sent = (s->bits_sent+7) & ~7;
+#endif
+}
+
+/* ===========================================================================
+ * Copy a stored block, storing first the length and its
+ * one's complement if requested.
+ */
+local void copy_block(s, buf, len, header)
+    deflate_state *s;
+    charf    *buf;    /* the input data */
+    unsigned len;     /* its length */
+    int      header;  /* true if block header must be written */
+{
+    bi_windup(s);        /* align on byte boundary */
+    s->last_eob_len = 8; /* enough lookahead for inflate */
+
+    if (header) {
+        put_short(s, (ush)len);
+        put_short(s, (ush)~len);
+#ifdef DEBUG
+        s->bits_sent += 2*16;
+#endif
+    }
+#ifdef DEBUG
+    s->bits_sent += (ulg)len<<3;
+#endif
+    while (len--) {
+        put_byte(s, *buf++);
+    }
+}
diff --git a/uts/common/zmod/zconf.h b/uts/common/zmod/zconf.h
new file mode 100644
index 000000000000..ccce7b2742da
--- /dev/null
+++ b/uts/common/zmod/zconf.h
@@ -0,0 +1,117 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_ZCONF_H
+#define	_ZCONF_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/types.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * We don't want to turn on zlib's debugging.
+ */
+#undef DEBUG
+
+/*
+ * We define our own memory allocation and deallocation routines that use kmem.
+ */
+#define	MY_ZCALLOC
+
+/*
+ * We don't define HAVE_MEMCPY here, but do in zutil.c, and implement our
+ * our versions of zmemcpy(), zmemzero(), and zmemcmp().
+ */
+
+/*
+ * We have a sufficiently capable compiler as to not need zlib's compiler hack.
+ */
+#define	NO_DUMMY_DECL
+
+#define	compressBound(len)	(len + (len >> 12) + (len >> 14) + 11)
+
+#define	z_off_t	off_t
+#define	OF(p)	p
+#define	ZEXTERN	extern
+#define	ZEXPORT
+#define	ZEXPORTVA
+#define	FAR
+
+#define	deflateInit_		z_deflateInit_
+#define	deflate			z_deflate
+#define	deflateEnd		z_deflateEnd
+#define	inflateInit_		z_inflateInit_
+#define	inflate			z_inflate
+#define	inflateEnd		z_inflateEnd
+#define	deflateInit2_		z_deflateInit2_
+#define	deflateSetDictionary	z_deflateSetDictionary
+#define	deflateCopy		z_deflateCopy
+#define	deflateReset		z_deflateReset
+#define	deflateParams		z_deflateParams
+#define	deflateBound		z_deflateBound
+#define	deflatePrime		z_deflatePrime
+#define	inflateInit2_		z_inflateInit2_
+#define	inflateSetDictionary	z_inflateSetDictionary
+#define	inflateSync		z_inflateSync
+#define	inflateSyncPoint	z_inflateSyncPoint
+#define	inflateCopy		z_inflateCopy
+#define	inflateReset		z_inflateReset
+#define	inflateBack		z_inflateBack
+#define	inflateBackEnd		z_inflateBackEnd
+#define	compress		zz_compress
+#define	compress2		zz_compress2
+#define	uncompress		zz_uncompress
+#define	adler32			z_adler32
+#define	crc32			z_crc32
+#define	get_crc_table		z_get_crc_table
+#define	zError			z_zError
+
+#define	MAX_MEM_LEVEL	9
+#define	MAX_WBITS	15
+
+typedef unsigned char Byte;
+typedef unsigned int uInt;
+typedef unsigned long uLong;
+typedef Byte Bytef;
+typedef char charf;
+typedef int intf;
+typedef uInt uIntf;
+typedef uLong uLongf;
+typedef void *voidpc;
+typedef void *voidpf;
+typedef void *voidp;
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _ZCONF_H */
diff --git a/uts/common/zmod/zlib.h b/uts/common/zmod/zlib.h
new file mode 100644
index 000000000000..9b971a0f5722
--- /dev/null
+++ b/uts/common/zmod/zlib.h
@@ -0,0 +1,1359 @@
+/* zlib.h -- interface of the 'zlib' general purpose compression library
+  version 1.2.3, July 18th, 2005
+
+  Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+
+  Jean-loup Gailly        Mark Adler
+  jloup@gzip.org          madler@alumni.caltech.edu
+
+
+  The data format used by the zlib library is described by RFCs (Request for
+  Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt
+  (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
+*/
+
+#ifndef _ZLIB_H
+#define _ZLIB_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include "zconf.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ZLIB_VERSION "1.2.3"
+#define ZLIB_VERNUM 0x1230
+
+/*
+     The 'zlib' compression library provides in-memory compression and
+  decompression functions, including integrity checks of the uncompressed
+  data.  This version of the library supports only one compression method
+  (deflation) but other algorithms will be added later and will have the same
+  stream interface.
+
+     Compression can be done in a single step if the buffers are large
+  enough (for example if an input file is mmap'ed), or can be done by
+  repeated calls of the compression function.  In the latter case, the
+  application must provide more input and/or consume the output
+  (providing more output space) before each call.
+
+     The compressed data format used by default by the in-memory functions is
+  the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
+  around a deflate stream, which is itself documented in RFC 1951.
+
+     The library also supports reading and writing files in gzip (.gz) format
+  with an interface similar to that of stdio using the functions that start
+  with "gz".  The gzip format is different from the zlib format.  gzip is a
+  gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
+
+     This library can optionally read and write gzip streams in memory as well.
+
+     The zlib format was designed to be compact and fast for use in memory
+  and on communications channels.  The gzip format was designed for single-
+  file compression on file systems, has a larger header than zlib to maintain
+  directory information, and uses a different, slower check method than zlib.
+
+     The library does not install any signal handler. The decoder checks
+  the consistency of the compressed data, so the library should never
+  crash even in case of corrupted input.
+*/
+
+typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
+typedef void   (*free_func)  OF((voidpf opaque, voidpf address));
+
+struct internal_state;
+
+typedef struct z_stream_s {
+    Bytef    *next_in;  /* next input byte */
+    uInt     avail_in;  /* number of bytes available at next_in */
+    uLong    total_in;  /* total nb of input bytes read so far */
+
+    Bytef    *next_out; /* next output byte should be put there */
+    uInt     avail_out; /* remaining free space at next_out */
+    uLong    total_out; /* total nb of bytes output so far */
+
+    char     *msg;      /* last error message, NULL if no error */
+    struct internal_state FAR *state; /* not visible by applications */
+
+    alloc_func zalloc;  /* used to allocate the internal state */
+    free_func  zfree;   /* used to free the internal state */
+    voidpf     opaque;  /* private data object passed to zalloc and zfree */
+
+    int     data_type;  /* best guess about the data type: binary or text */
+    uLong   adler;      /* adler32 value of the uncompressed data */
+    uLong   reserved;   /* reserved for future use */
+} z_stream;
+
+typedef z_stream FAR *z_streamp;
+
+/*
+     gzip header information passed to and from zlib routines.  See RFC 1952
+  for more details on the meanings of these fields.
+*/
+typedef struct gz_header_s {
+    int     text;       /* true if compressed data believed to be text */
+    uLong   time;       /* modification time */
+    int     xflags;     /* extra flags (not used when writing a gzip file) */
+    int     os;         /* operating system */
+    Bytef   *extra;     /* pointer to extra field or Z_NULL if none */
+    uInt    extra_len;  /* extra field length (valid if extra != Z_NULL) */
+    uInt    extra_max;  /* space at extra (only when reading header) */
+    Bytef   *name;      /* pointer to zero-terminated file name or Z_NULL */
+    uInt    name_max;   /* space at name (only when reading header) */
+    Bytef   *comment;   /* pointer to zero-terminated comment or Z_NULL */
+    uInt    comm_max;   /* space at comment (only when reading header) */
+    int     hcrc;       /* true if there was or will be a header crc */
+    int     done;       /* true when done reading gzip header (not used
+                           when writing a gzip file) */
+} gz_header;
+
+typedef gz_header FAR *gz_headerp;
+
+/*
+   The application must update next_in and avail_in when avail_in has
+   dropped to zero. It must update next_out and avail_out when avail_out
+   has dropped to zero. The application must initialize zalloc, zfree and
+   opaque before calling the init function. All other fields are set by the
+   compression library and must not be updated by the application.
+
+   The opaque value provided by the application will be passed as the first
+   parameter for calls of zalloc and zfree. This can be useful for custom
+   memory management. The compression library attaches no meaning to the
+   opaque value.
+
+   zalloc must return Z_NULL if there is not enough memory for the object.
+   If zlib is used in a multi-threaded application, zalloc and zfree must be
+   thread safe.
+
+   On 16-bit systems, the functions zalloc and zfree must be able to allocate
+   exactly 65536 bytes, but will not be required to allocate more than this
+   if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
+   pointers returned by zalloc for objects of exactly 65536 bytes *must*
+   have their offset normalized to zero. The default allocation function
+   provided by this library ensures this (see zutil.c). To reduce memory
+   requirements and avoid any allocation of 64K objects, at the expense of
+   compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
+
+   The fields total_in and total_out can be used for statistics or
+   progress reports. After compression, total_in holds the total size of
+   the uncompressed data and may be saved for use in the decompressor
+   (particularly if the decompressor wants to decompress everything in
+   a single step).
+*/
+
+                        /* constants */
+
+#define Z_NO_FLUSH      0
+#define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */
+#define Z_SYNC_FLUSH    2
+#define Z_FULL_FLUSH    3
+#define Z_FINISH        4
+#define Z_BLOCK         5
+/* Allowed flush values; see deflate() and inflate() below for details */
+
+#define Z_OK            0
+#define Z_STREAM_END    1
+#define Z_NEED_DICT     2
+#define Z_ERRNO        (-1)
+#define Z_STREAM_ERROR (-2)
+#define Z_DATA_ERROR   (-3)
+#define Z_MEM_ERROR    (-4)
+#define Z_BUF_ERROR    (-5)
+#define Z_VERSION_ERROR (-6)
+/* Return codes for the compression/decompression functions. Negative
+ * values are errors, positive values are used for special but normal events.
+ */
+
+#define Z_NO_COMPRESSION         0
+#define Z_BEST_SPEED             1
+#define Z_BEST_COMPRESSION       9
+#define Z_DEFAULT_COMPRESSION  (-1)
+/* compression levels */
+
+#define Z_FILTERED            1
+#define Z_HUFFMAN_ONLY        2
+#define Z_RLE                 3
+#define Z_FIXED               4
+#define Z_DEFAULT_STRATEGY    0
+/* compression strategy; see deflateInit2() below for details */
+
+#define Z_BINARY   0
+#define Z_TEXT     1
+#define Z_ASCII    Z_TEXT   /* for compatibility with 1.2.2 and earlier */
+#define Z_UNKNOWN  2
+/* Possible values of the data_type field (though see inflate()) */
+
+#define Z_DEFLATED   8
+/* The deflate compression method (the only one supported in this version) */
+
+#define Z_NULL  0  /* for initializing zalloc, zfree, opaque */
+
+#define zlib_version zlibVersion()
+/* for compatibility with versions < 1.0.2 */
+
+                        /* basic functions */
+
+ZEXTERN const char * ZEXPORT zlibVersion OF((void));
+/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
+   If the first character differs, the library code actually used is
+   not compatible with the zlib.h header file used by the application.
+   This check is automatically made by deflateInit and inflateInit.
+ */
+
+/*
+ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));
+
+     Initializes the internal stream state for compression. The fields
+   zalloc, zfree and opaque must be initialized before by the caller.
+   If zalloc and zfree are set to Z_NULL, deflateInit updates them to
+   use default allocation functions.
+
+     The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:
+   1 gives best speed, 9 gives best compression, 0 gives no compression at
+   all (the input data is simply copied a block at a time).
+   Z_DEFAULT_COMPRESSION requests a default compromise between speed and
+   compression (currently equivalent to level 6).
+
+     deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
+   enough memory, Z_STREAM_ERROR if level is not a valid compression level,
+   Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible
+   with the version assumed by the caller (ZLIB_VERSION).
+   msg is set to null if there is no error message.  deflateInit does not
+   perform any compression: this will be done by deflate().
+*/
+
+
+ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
+/*
+    deflate compresses as much data as possible, and stops when the input
+  buffer becomes empty or the output buffer becomes full. It may introduce some
+  output latency (reading input without producing any output) except when
+  forced to flush.
+
+    The detailed semantics are as follows. deflate performs one or both of the
+  following actions:
+
+  - Compress more input starting at next_in and update next_in and avail_in
+    accordingly. If not all input can be processed (because there is not
+    enough room in the output buffer), next_in and avail_in are updated and
+    processing will resume at this point for the next call of deflate().
+
+  - Provide more output starting at next_out and update next_out and avail_out
+    accordingly. This action is forced if the parameter flush is non zero.
+    Forcing flush frequently degrades the compression ratio, so this parameter
+    should be set only when necessary (in interactive applications).
+    Some output may be provided even if flush is not set.
+
+  Before the call of deflate(), the application should ensure that at least
+  one of the actions is possible, by providing more input and/or consuming
+  more output, and updating avail_in or avail_out accordingly; avail_out
+  should never be zero before the call. The application can consume the
+  compressed output when it wants, for example when the output buffer is full
+  (avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
+  and with zero avail_out, it must be called again after making room in the
+  output buffer because there might be more output pending.
+
+    Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
+  decide how much data to accumualte before producing output, in order to
+  maximize compression.
+
+    If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
+  flushed to the output buffer and the output is aligned on a byte boundary, so
+  that the decompressor can get all input data available so far. (In particular
+  avail_in is zero after the call if enough output space has been provided
+  before the call.)  Flushing may degrade compression for some compression
+  algorithms and so it should be used only when necessary.
+
+    If flush is set to Z_FULL_FLUSH, all output is flushed as with
+  Z_SYNC_FLUSH, and the compression state is reset so that decompression can
+  restart from this point if previous compressed data has been damaged or if
+  random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
+  compression.
+
+    If deflate returns with avail_out == 0, this function must be called again
+  with the same value of the flush parameter and more output space (updated
+  avail_out), until the flush is complete (deflate returns with non-zero
+  avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that
+  avail_out is greater than six to avoid repeated flush markers due to
+  avail_out == 0 on return.
+
+    If the parameter flush is set to Z_FINISH, pending input is processed,
+  pending output is flushed and deflate returns with Z_STREAM_END if there
+  was enough output space; if deflate returns with Z_OK, this function must be
+  called again with Z_FINISH and more output space (updated avail_out) but no
+  more input data, until it returns with Z_STREAM_END or an error. After
+  deflate has returned Z_STREAM_END, the only possible operations on the
+  stream are deflateReset or deflateEnd.
+
+    Z_FINISH can be used immediately after deflateInit if all the compression
+  is to be done in a single step. In this case, avail_out must be at least
+  the value returned by deflateBound (see below). If deflate does not return
+  Z_STREAM_END, then it must be called again as described above.
+
+    deflate() sets strm->adler to the adler32 checksum of all input read
+  so far (that is, total_in bytes).
+
+    deflate() may update strm->data_type if it can make a good guess about
+  the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered
+  binary. This field is only for information purposes and does not affect
+  the compression algorithm in any manner.
+
+    deflate() returns Z_OK if some progress has been made (more input
+  processed or more output produced), Z_STREAM_END if all input has been
+  consumed and all output has been produced (only when flush is set to
+  Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
+  if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
+  (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not
+  fatal, and deflate() can be called again with more input and more output
+  space to continue compressing.
+*/
+
+
+ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
+/*
+     All dynamically allocated data structures for this stream are freed.
+   This function discards any unprocessed input and does not flush any
+   pending output.
+
+     deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
+   stream state was inconsistent, Z_DATA_ERROR if the stream was freed
+   prematurely (some input or output was discarded). In the error case,
+   msg may be set but then points to a static string (which must not be
+   deallocated).
+*/
+
+
+/*
+ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
+
+     Initializes the internal stream state for decompression. The fields
+   next_in, avail_in, zalloc, zfree and opaque must be initialized before by
+   the caller. If next_in is not Z_NULL and avail_in is large enough (the exact
+   value depends on the compression method), inflateInit determines the
+   compression method from the zlib header and allocates all data structures
+   accordingly; otherwise the allocation will be deferred to the first call of
+   inflate.  If zalloc and zfree are set to Z_NULL, inflateInit updates them to
+   use default allocation functions.
+
+     inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
+   memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
+   version assumed by the caller.  msg is set to null if there is no error
+   message. inflateInit does not perform any decompression apart from reading
+   the zlib header if present: this will be done by inflate().  (So next_in and
+   avail_in may be modified, but next_out and avail_out are unchanged.)
+*/
+
+
+ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
+/*
+    inflate decompresses as much data as possible, and stops when the input
+  buffer becomes empty or the output buffer becomes full. It may introduce
+  some output latency (reading input without producing any output) except when
+  forced to flush.
+
+  The detailed semantics are as follows. inflate performs one or both of the
+  following actions:
+
+  - Decompress more input starting at next_in and update next_in and avail_in
+    accordingly. If not all input can be processed (because there is not
+    enough room in the output buffer), next_in is updated and processing
+    will resume at this point for the next call of inflate().
+
+  - Provide more output starting at next_out and update next_out and avail_out
+    accordingly.  inflate() provides as much output as possible, until there
+    is no more input data or no more space in the output buffer (see below
+    about the flush parameter).
+
+  Before the call of inflate(), the application should ensure that at least
+  one of the actions is possible, by providing more input and/or consuming
+  more output, and updating the next_* and avail_* values accordingly.
+  The application can consume the uncompressed output when it wants, for
+  example when the output buffer is full (avail_out == 0), or after each
+  call of inflate(). If inflate returns Z_OK and with zero avail_out, it
+  must be called again after making room in the output buffer because there
+  might be more output pending.
+
+    The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH,
+  Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much
+  output as possible to the output buffer. Z_BLOCK requests that inflate() stop
+  if and when it gets to the next deflate block boundary. When decoding the
+  zlib or gzip format, this will cause inflate() to return immediately after
+  the header and before the first block. When doing a raw inflate, inflate()
+  will go ahead and process the first block, and will return when it gets to
+  the end of that block, or when it runs out of data.
+
+    The Z_BLOCK option assists in appending to or combining deflate streams.
+  Also to assist in this, on return inflate() will set strm->data_type to the
+  number of unused bits in the last byte taken from strm->next_in, plus 64
+  if inflate() is currently decoding the last block in the deflate stream,
+  plus 128 if inflate() returned immediately after decoding an end-of-block
+  code or decoding the complete header up to just before the first byte of the
+  deflate stream. The end-of-block will not be indicated until all of the
+  uncompressed data from that block has been written to strm->next_out.  The
+  number of unused bits may in general be greater than seven, except when
+  bit 7 of data_type is set, in which case the number of unused bits will be
+  less than eight.
+
+    inflate() should normally be called until it returns Z_STREAM_END or an
+  error. However if all decompression is to be performed in a single step
+  (a single call of inflate), the parameter flush should be set to
+  Z_FINISH. In this case all pending input is processed and all pending
+  output is flushed; avail_out must be large enough to hold all the
+  uncompressed data. (The size of the uncompressed data may have been saved
+  by the compressor for this purpose.) The next operation on this stream must
+  be inflateEnd to deallocate the decompression state. The use of Z_FINISH
+  is never required, but can be used to inform inflate that a faster approach
+  may be used for the single inflate() call.
+
+     In this implementation, inflate() always flushes as much output as
+  possible to the output buffer, and always uses the faster approach on the
+  first call. So the only effect of the flush parameter in this implementation
+  is on the return value of inflate(), as noted below, or when it returns early
+  because Z_BLOCK is used.
+
+     If a preset dictionary is needed after this call (see inflateSetDictionary
+  below), inflate sets strm->adler to the adler32 checksum of the dictionary
+  chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
+  strm->adler to the adler32 checksum of all output produced so far (that is,
+  total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
+  below. At the end of the stream, inflate() checks that its computed adler32
+  checksum is equal to that saved by the compressor and returns Z_STREAM_END
+  only if the checksum is correct.
+
+    inflate() will decompress and check either zlib-wrapped or gzip-wrapped
+  deflate data.  The header type is detected automatically.  Any information
+  contained in the gzip header is not retained, so applications that need that
+  information should instead use raw inflate, see inflateInit2() below, or
+  inflateBack() and perform their own processing of the gzip header and
+  trailer.
+
+    inflate() returns Z_OK if some progress has been made (more input processed
+  or more output produced), Z_STREAM_END if the end of the compressed data has
+  been reached and all uncompressed output has been produced, Z_NEED_DICT if a
+  preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
+  corrupted (input stream not conforming to the zlib format or incorrect check
+  value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
+  if next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory,
+  Z_BUF_ERROR if no progress is possible or if there was not enough room in the
+  output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
+  inflate() can be called again with more input and more output space to
+  continue decompressing. If Z_DATA_ERROR is returned, the application may then
+  call inflateSync() to look for a good compression block if a partial recovery
+  of the data is desired.
+*/
+
+
+ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
+/*
+     All dynamically allocated data structures for this stream are freed.
+   This function discards any unprocessed input and does not flush any
+   pending output.
+
+     inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
+   was inconsistent. In the error case, msg may be set but then points to a
+   static string (which must not be deallocated).
+*/
+
+                        /* Advanced functions */
+
+/*
+    The following functions are needed only in some special applications.
+*/
+
+/*
+ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
+                                     int  level,
+                                     int  method,
+                                     int  windowBits,
+                                     int  memLevel,
+                                     int  strategy));
+
+     This is another version of deflateInit with more compression options. The
+   fields next_in, zalloc, zfree and opaque must be initialized before by
+   the caller.
+
+     The method parameter is the compression method. It must be Z_DEFLATED in
+   this version of the library.
+
+     The windowBits parameter is the base two logarithm of the window size
+   (the size of the history buffer). It should be in the range 8..15 for this
+   version of the library. Larger values of this parameter result in better
+   compression at the expense of memory usage. The default value is 15 if
+   deflateInit is used instead.
+
+     windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
+   determines the window size. deflate() will then generate raw deflate data
+   with no zlib header or trailer, and will not compute an adler32 check value.
+
+     windowBits can also be greater than 15 for optional gzip encoding. Add
+   16 to windowBits to write a simple gzip header and trailer around the
+   compressed data instead of a zlib wrapper. The gzip header will have no
+   file name, no extra data, no comment, no modification time (set to zero),
+   no header crc, and the operating system will be set to 255 (unknown).  If a
+   gzip stream is being written, strm->adler is a crc32 instead of an adler32.
+
+     The memLevel parameter specifies how much memory should be allocated
+   for the internal compression state. memLevel=1 uses minimum memory but
+   is slow and reduces compression ratio; memLevel=9 uses maximum memory
+   for optimal speed. The default value is 8. See zconf.h for total memory
+   usage as a function of windowBits and memLevel.
+
+     The strategy parameter is used to tune the compression algorithm. Use the
+   value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
+   filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no
+   string match), or Z_RLE to limit match distances to one (run-length
+   encoding). Filtered data consists mostly of small values with a somewhat
+   random distribution. In this case, the compression algorithm is tuned to
+   compress them better. The effect of Z_FILTERED is to force more Huffman
+   coding and less string matching; it is somewhat intermediate between
+   Z_DEFAULT and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as fast as
+   Z_HUFFMAN_ONLY, but give better compression for PNG image data. The strategy
+   parameter only affects the compression ratio but not the correctness of the
+   compressed output even if it is not set appropriately.  Z_FIXED prevents the
+   use of dynamic Huffman codes, allowing for a simpler decoder for special
+   applications.
+
+      deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+   memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
+   method). msg is set to null if there is no error message.  deflateInit2 does
+   not perform any compression: this will be done by deflate().
+*/
+
+ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
+                                             const Bytef *dictionary,
+                                             uInt  dictLength));
+/*
+     Initializes the compression dictionary from the given byte sequence
+   without producing any compressed output. This function must be called
+   immediately after deflateInit, deflateInit2 or deflateReset, before any
+   call of deflate. The compressor and decompressor must use exactly the same
+   dictionary (see inflateSetDictionary).
+
+     The dictionary should consist of strings (byte sequences) that are likely
+   to be encountered later in the data to be compressed, with the most commonly
+   used strings preferably put towards the end of the dictionary. Using a
+   dictionary is most useful when the data to be compressed is short and can be
+   predicted with good accuracy; the data can then be compressed better than
+   with the default empty dictionary.
+
+     Depending on the size of the compression data structures selected by
+   deflateInit or deflateInit2, a part of the dictionary may in effect be
+   discarded, for example if the dictionary is larger than the window size in
+   deflate or deflate2. Thus the strings most likely to be useful should be
+   put at the end of the dictionary, not at the front. In addition, the
+   current implementation of deflate will use at most the window size minus
+   262 bytes of the provided dictionary.
+
+     Upon return of this function, strm->adler is set to the adler32 value
+   of the dictionary; the decompressor may later use this value to determine
+   which dictionary has been used by the compressor. (The adler32 value
+   applies to the whole dictionary even if only a subset of the dictionary is
+   actually used by the compressor.) If a raw deflate was requested, then the
+   adler32 value is not computed and strm->adler is not set.
+
+     deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
+   parameter is invalid (such as NULL dictionary) or the stream state is
+   inconsistent (for example if deflate has already been called for this stream
+   or if the compression method is bsort). deflateSetDictionary does not
+   perform any compression: this will be done by deflate().
+*/
+
+ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
+                                    z_streamp source));
+/*
+     Sets the destination stream as a complete copy of the source stream.
+
+     This function can be useful when several compression strategies will be
+   tried, for example when there are several ways of pre-processing the input
+   data with a filter. The streams that will be discarded should then be freed
+   by calling deflateEnd.  Note that deflateCopy duplicates the internal
+   compression state which can be quite large, so this strategy is slow and
+   can consume lots of memory.
+
+     deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
+   enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
+   (such as zalloc being NULL). msg is left unchanged in both source and
+   destination.
+*/
+
+ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
+/*
+     This function is equivalent to deflateEnd followed by deflateInit,
+   but does not free and reallocate all the internal compression state.
+   The stream will keep the same compression level and any other attributes
+   that may have been set by deflateInit2.
+
+      deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
+   stream state was inconsistent (such as zalloc or state being NULL).
+*/
+
+ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
+                                      int level,
+                                      int strategy));
+/*
+     Dynamically update the compression level and compression strategy.  The
+   interpretation of level and strategy is as in deflateInit2.  This can be
+   used to switch between compression and straight copy of the input data, or
+   to switch to a different kind of input data requiring a different
+   strategy. If the compression level is changed, the input available so far
+   is compressed with the old level (and may be flushed); the new level will
+   take effect only at the next call of deflate().
+
+     Before the call of deflateParams, the stream state must be set as for
+   a call of deflate(), since the currently available input may have to
+   be compressed and flushed. In particular, strm->avail_out must be non-zero.
+
+     deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
+   stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
+   if strm->avail_out was zero.
+*/
+
+ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,
+                                    int good_length,
+                                    int max_lazy,
+                                    int nice_length,
+                                    int max_chain));
+/*
+     Fine tune deflate's internal compression parameters.  This should only be
+   used by someone who understands the algorithm used by zlib's deflate for
+   searching for the best matching string, and even then only by the most
+   fanatic optimizer trying to squeeze out the last compressed bit for their
+   specific input data.  Read the deflate.c source code for the meaning of the
+   max_lazy, good_length, nice_length, and max_chain parameters.
+
+     deflateTune() can be called after deflateInit() or deflateInit2(), and
+   returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream.
+ */
+
+ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
+                                       uLong sourceLen));
+/*
+     deflateBound() returns an upper bound on the compressed size after
+   deflation of sourceLen bytes.  It must be called after deflateInit()
+   or deflateInit2().  This would be used to allocate an output buffer
+   for deflation in a single pass, and so would be called before deflate().
+*/
+
+ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
+                                     int bits,
+                                     int value));
+/*
+     deflatePrime() inserts bits in the deflate output stream.  The intent
+  is that this function is used to start off the deflate output with the
+  bits leftover from a previous deflate stream when appending to it.  As such,
+  this function can only be used for raw deflate, and must be used before the
+  first deflate() call after a deflateInit2() or deflateReset().  bits must be
+  less than or equal to 16, and that many of the least significant bits of
+  value will be inserted in the output.
+
+      deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
+   stream state was inconsistent.
+*/
+
+ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
+                                         gz_headerp head));
+/*
+      deflateSetHeader() provides gzip header information for when a gzip
+   stream is requested by deflateInit2().  deflateSetHeader() may be called
+   after deflateInit2() or deflateReset() and before the first call of
+   deflate().  The text, time, os, extra field, name, and comment information
+   in the provided gz_header structure are written to the gzip header (xflag is
+   ignored -- the extra flags are set according to the compression level).  The
+   caller must assure that, if not Z_NULL, name and comment are terminated with
+   a zero byte, and that if extra is not Z_NULL, that extra_len bytes are
+   available there.  If hcrc is true, a gzip header crc is included.  Note that
+   the current versions of the command-line version of gzip (up through version
+   1.3.x) do not support header crc's, and will report that it is a "multi-part
+   gzip file" and give up.
+
+      If deflateSetHeader is not used, the default gzip header has text false,
+   the time set to zero, and os set to 255, with no extra, name, or comment
+   fields.  The gzip header is returned to the default state by deflateReset().
+
+      deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
+   stream state was inconsistent.
+*/
+
+/*
+ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
+                                     int  windowBits));
+
+     This is another version of inflateInit with an extra parameter. The
+   fields next_in, avail_in, zalloc, zfree and opaque must be initialized
+   before by the caller.
+
+     The windowBits parameter is the base two logarithm of the maximum window
+   size (the size of the history buffer).  It should be in the range 8..15 for
+   this version of the library. The default value is 15 if inflateInit is used
+   instead. windowBits must be greater than or equal to the windowBits value
+   provided to deflateInit2() while compressing, or it must be equal to 15 if
+   deflateInit2() was not used. If a compressed stream with a larger window
+   size is given as input, inflate() will return with the error code
+   Z_DATA_ERROR instead of trying to allocate a larger window.
+
+     windowBits can also be -8..-15 for raw inflate. In this case, -windowBits
+   determines the window size. inflate() will then process raw deflate data,
+   not looking for a zlib or gzip header, not generating a check value, and not
+   looking for any check values for comparison at the end of the stream. This
+   is for use with other formats that use the deflate compressed data format
+   such as zip.  Those formats provide their own check values. If a custom
+   format is developed using the raw deflate format for compressed data, it is
+   recommended that a check value such as an adler32 or a crc32 be applied to
+   the uncompressed data as is done in the zlib, gzip, and zip formats.  For
+   most applications, the zlib format should be used as is. Note that comments
+   above on the use in deflateInit2() applies to the magnitude of windowBits.
+
+     windowBits can also be greater than 15 for optional gzip decoding. Add
+   32 to windowBits to enable zlib and gzip decoding with automatic header
+   detection, or add 16 to decode only the gzip format (the zlib format will
+   return a Z_DATA_ERROR).  If a gzip stream is being decoded, strm->adler is
+   a crc32 instead of an adler32.
+
+     inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+   memory, Z_STREAM_ERROR if a parameter is invalid (such as a null strm). msg
+   is set to null if there is no error message.  inflateInit2 does not perform
+   any decompression apart from reading the zlib header if present: this will
+   be done by inflate(). (So next_in and avail_in may be modified, but next_out
+   and avail_out are unchanged.)
+*/
+
+ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
+                                             const Bytef *dictionary,
+                                             uInt  dictLength));
+/*
+     Initializes the decompression dictionary from the given uncompressed byte
+   sequence. This function must be called immediately after a call of inflate,
+   if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
+   can be determined from the adler32 value returned by that call of inflate.
+   The compressor and decompressor must use exactly the same dictionary (see
+   deflateSetDictionary).  For raw inflate, this function can be called
+   immediately after inflateInit2() or inflateReset() and before any call of
+   inflate() to set the dictionary.  The application must insure that the
+   dictionary that was used for compression is provided.
+
+     inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
+   parameter is invalid (such as NULL dictionary) or the stream state is
+   inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
+   expected one (incorrect adler32 value). inflateSetDictionary does not
+   perform any decompression: this will be done by subsequent calls of
+   inflate().
+*/
+
+ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
+/*
+    Skips invalid compressed data until a full flush point (see above the
+  description of deflate with Z_FULL_FLUSH) can be found, or until all
+  available input is skipped. No output is provided.
+
+    inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
+  if no more input was provided, Z_DATA_ERROR if no flush point has been found,
+  or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
+  case, the application may save the current current value of total_in which
+  indicates where valid compressed data was found. In the error case, the
+  application may repeatedly call inflateSync, providing more input each time,
+  until success or end of the input data.
+*/
+
+ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
+                                    z_streamp source));
+/*
+     Sets the destination stream as a complete copy of the source stream.
+
+     This function can be useful when randomly accessing a large stream.  The
+   first pass through the stream can periodically record the inflate state,
+   allowing restarting inflate at those points when randomly accessing the
+   stream.
+
+     inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
+   enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
+   (such as zalloc being NULL). msg is left unchanged in both source and
+   destination.
+*/
+
+ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
+/*
+     This function is equivalent to inflateEnd followed by inflateInit,
+   but does not free and reallocate all the internal decompression state.
+   The stream will keep attributes that may have been set by inflateInit2.
+
+      inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
+   stream state was inconsistent (such as zalloc or state being NULL).
+*/
+
+ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm,
+                                     int bits,
+                                     int value));
+/*
+     This function inserts bits in the inflate input stream.  The intent is
+  that this function is used to start inflating at a bit position in the
+  middle of a byte.  The provided bits will be used before any bytes are used
+  from next_in.  This function should only be used with raw inflate, and
+  should be used before the first inflate() call after inflateInit2() or
+  inflateReset().  bits must be less than or equal to 16, and that many of the
+  least significant bits of value will be inserted in the input.
+
+      inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
+   stream state was inconsistent.
+*/
+
+ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm,
+                                         gz_headerp head));
+/*
+      inflateGetHeader() requests that gzip header information be stored in the
+   provided gz_header structure.  inflateGetHeader() may be called after
+   inflateInit2() or inflateReset(), and before the first call of inflate().
+   As inflate() processes the gzip stream, head->done is zero until the header
+   is completed, at which time head->done is set to one.  If a zlib stream is
+   being decoded, then head->done is set to -1 to indicate that there will be
+   no gzip header information forthcoming.  Note that Z_BLOCK can be used to
+   force inflate() to return immediately after header processing is complete
+   and before any actual data is decompressed.
+
+      The text, time, xflags, and os fields are filled in with the gzip header
+   contents.  hcrc is set to true if there is a header CRC.  (The header CRC
+   was valid if done is set to one.)  If extra is not Z_NULL, then extra_max
+   contains the maximum number of bytes to write to extra.  Once done is true,
+   extra_len contains the actual extra field length, and extra contains the
+   extra field, or that field truncated if extra_max is less than extra_len.
+   If name is not Z_NULL, then up to name_max characters are written there,
+   terminated with a zero unless the length is greater than name_max.  If
+   comment is not Z_NULL, then up to comm_max characters are written there,
+   terminated with a zero unless the length is greater than comm_max.  When
+   any of extra, name, or comment are not Z_NULL and the respective field is
+   not present in the header, then that field is set to Z_NULL to signal its
+   absence.  This allows the use of deflateSetHeader() with the returned
+   structure to duplicate the header.  However if those fields are set to
+   allocated memory, then the application will need to save those pointers
+   elsewhere so that they can be eventually freed.
+
+      If inflateGetHeader is not used, then the header information is simply
+   discarded.  The header is always checked for validity, including the header
+   CRC if present.  inflateReset() will reset the process to discard the header
+   information.  The application would need to call inflateGetHeader() again to
+   retrieve the header from the next gzip stream.
+
+      inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
+   stream state was inconsistent.
+*/
+
+/*
+ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits,
+                                        unsigned char FAR *window));
+
+     Initialize the internal stream state for decompression using inflateBack()
+   calls.  The fields zalloc, zfree and opaque in strm must be initialized
+   before the call.  If zalloc and zfree are Z_NULL, then the default library-
+   derived memory allocation routines are used.  windowBits is the base two
+   logarithm of the window size, in the range 8..15.  window is a caller
+   supplied buffer of that size.  Except for special applications where it is
+   assured that deflate was used with small window sizes, windowBits must be 15
+   and a 32K byte window must be supplied to be able to decompress general
+   deflate streams.
+
+     See inflateBack() for the usage of these routines.
+
+     inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
+   the paramaters are invalid, Z_MEM_ERROR if the internal state could not
+   be allocated, or Z_VERSION_ERROR if the version of the library does not
+   match the version of the header file.
+*/
+
+typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
+typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
+
+ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
+                                    in_func in, void FAR *in_desc,
+                                    out_func out, void FAR *out_desc));
+/*
+     inflateBack() does a raw inflate with a single call using a call-back
+   interface for input and output.  This is more efficient than inflate() for
+   file i/o applications in that it avoids copying between the output and the
+   sliding window by simply making the window itself the output buffer.  This
+   function trusts the application to not change the output buffer passed by
+   the output function, at least until inflateBack() returns.
+
+     inflateBackInit() must be called first to allocate the internal state
+   and to initialize the state with the user-provided window buffer.
+   inflateBack() may then be used multiple times to inflate a complete, raw
+   deflate stream with each call.  inflateBackEnd() is then called to free
+   the allocated state.
+
+     A raw deflate stream is one with no zlib or gzip header or trailer.
+   This routine would normally be used in a utility that reads zip or gzip
+   files and writes out uncompressed files.  The utility would decode the
+   header and process the trailer on its own, hence this routine expects
+   only the raw deflate stream to decompress.  This is different from the
+   normal behavior of inflate(), which expects either a zlib or gzip header and
+   trailer around the deflate stream.
+
+     inflateBack() uses two subroutines supplied by the caller that are then
+   called by inflateBack() for input and output.  inflateBack() calls those
+   routines until it reads a complete deflate stream and writes out all of the
+   uncompressed data, or until it encounters an error.  The function's
+   parameters and return types are defined above in the in_func and out_func
+   typedefs.  inflateBack() will call in(in_desc, &buf) which should return the
+   number of bytes of provided input, and a pointer to that input in buf.  If
+   there is no input available, in() must return zero--buf is ignored in that
+   case--and inflateBack() will return a buffer error.  inflateBack() will call
+   out(out_desc, buf, len) to write the uncompressed data buf[0..len-1].  out()
+   should return zero on success, or non-zero on failure.  If out() returns
+   non-zero, inflateBack() will return with an error.  Neither in() nor out()
+   are permitted to change the contents of the window provided to
+   inflateBackInit(), which is also the buffer that out() uses to write from.
+   The length written by out() will be at most the window size.  Any non-zero
+   amount of input may be provided by in().
+
+     For convenience, inflateBack() can be provided input on the first call by
+   setting strm->next_in and strm->avail_in.  If that input is exhausted, then
+   in() will be called.  Therefore strm->next_in must be initialized before
+   calling inflateBack().  If strm->next_in is Z_NULL, then in() will be called
+   immediately for input.  If strm->next_in is not Z_NULL, then strm->avail_in
+   must also be initialized, and then if strm->avail_in is not zero, input will
+   initially be taken from strm->next_in[0 .. strm->avail_in - 1].
+
+     The in_desc and out_desc parameters of inflateBack() is passed as the
+   first parameter of in() and out() respectively when they are called.  These
+   descriptors can be optionally used to pass any information that the caller-
+   supplied in() and out() functions need to do their job.
+
+     On return, inflateBack() will set strm->next_in and strm->avail_in to
+   pass back any unused input that was provided by the last in() call.  The
+   return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR
+   if in() or out() returned an error, Z_DATA_ERROR if there was a format
+   error in the deflate stream (in which case strm->msg is set to indicate the
+   nature of the error), or Z_STREAM_ERROR if the stream was not properly
+   initialized.  In the case of Z_BUF_ERROR, an input or output error can be
+   distinguished using strm->next_in which will be Z_NULL only if in() returned
+   an error.  If strm->next is not Z_NULL, then the Z_BUF_ERROR was due to
+   out() returning non-zero.  (in() will always be called before out(), so
+   strm->next_in is assured to be defined if out() returns non-zero.)  Note
+   that inflateBack() cannot return Z_OK.
+*/
+
+ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm));
+/*
+     All memory allocated by inflateBackInit() is freed.
+
+     inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream
+   state was inconsistent.
+*/
+
+ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
+/* Return flags indicating compile-time options.
+
+    Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other:
+     1.0: size of uInt
+     3.2: size of uLong
+     5.4: size of voidpf (pointer)
+     7.6: size of z_off_t
+
+    Compiler, assembler, and debug options:
+     8: DEBUG
+     9: ASMV or ASMINF -- use ASM code
+     10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention
+     11: 0 (reserved)
+
+    One-time table building (smaller code, but not thread-safe if true):
+     12: BUILDFIXED -- build static block decoding tables when needed
+     13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed
+     14,15: 0 (reserved)
+
+    Library content (indicates missing functionality):
+     16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking
+                          deflate code when not needed)
+     17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect
+                    and decode gzip streams (to avoid linking crc code)
+     18-19: 0 (reserved)
+
+    Operation variations (changes in library functionality):
+     20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate
+     21: FASTEST -- deflate algorithm with only one, lowest compression level
+     22,23: 0 (reserved)
+
+    The sprintf variant used by gzprintf (zero is best):
+     24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format
+     25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure!
+     26: 0 = returns value, 1 = void -- 1 means inferred string length returned
+
+    Remainder:
+     27-31: 0 (reserved)
+ */
+
+
+                        /* utility functions */
+
+/*
+     The following utility functions are implemented on top of the
+   basic stream-oriented functions. To simplify the interface, some
+   default options are assumed (compression level and memory usage,
+   standard memory allocation functions). The source code of these
+   utility functions can easily be modified if you need special options.
+*/
+
+ZEXTERN int ZEXPORT compress OF((Bytef *dest,   uLongf *destLen,
+                                 const Bytef *source, uLong sourceLen));
+/*
+     Compresses the source buffer into the destination buffer.  sourceLen is
+   the byte length of the source buffer. Upon entry, destLen is the total
+   size of the destination buffer, which must be at least the value returned
+   by compressBound(sourceLen). Upon exit, destLen is the actual size of the
+   compressed buffer.
+     This function can be used to compress a whole file at once if the
+   input file is mmap'ed.
+     compress returns Z_OK if success, Z_MEM_ERROR if there was not
+   enough memory, Z_BUF_ERROR if there was not enough room in the output
+   buffer.
+*/
+
+ZEXTERN int ZEXPORT compress2 OF((Bytef *dest,   uLongf *destLen,
+                                  const Bytef *source, uLong sourceLen,
+                                  int level));
+/*
+     Compresses the source buffer into the destination buffer. The level
+   parameter has the same meaning as in deflateInit.  sourceLen is the byte
+   length of the source buffer. Upon entry, destLen is the total size of the
+   destination buffer, which must be at least the value returned by
+   compressBound(sourceLen). Upon exit, destLen is the actual size of the
+   compressed buffer.
+
+     compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+   memory, Z_BUF_ERROR if there was not enough room in the output buffer,
+   Z_STREAM_ERROR if the level parameter is invalid.
+*/
+
+ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen));
+/*
+     compressBound() returns an upper bound on the compressed size after
+   compress() or compress2() on sourceLen bytes.  It would be used before
+   a compress() or compress2() call to allocate the destination buffer.
+*/
+
+ZEXTERN int ZEXPORT uncompress OF((Bytef *dest,   uLongf *destLen,
+                                   const Bytef *source, uLong sourceLen));
+/*
+     Decompresses the source buffer into the destination buffer.  sourceLen is
+   the byte length of the source buffer. Upon entry, destLen is the total
+   size of the destination buffer, which must be large enough to hold the
+   entire uncompressed data. (The size of the uncompressed data must have
+   been saved previously by the compressor and transmitted to the decompressor
+   by some mechanism outside the scope of this compression library.)
+   Upon exit, destLen is the actual size of the compressed buffer.
+     This function can be used to decompress a whole file at once if the
+   input file is mmap'ed.
+
+     uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
+   enough memory, Z_BUF_ERROR if there was not enough room in the output
+   buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete.
+*/
+
+
+typedef voidp gzFile;
+
+ZEXTERN gzFile ZEXPORT gzopen  OF((const char *path, const char *mode));
+/*
+     Opens a gzip (.gz) file for reading or writing. The mode parameter
+   is as in fopen ("rb" or "wb") but can also include a compression level
+   ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
+   Huffman only compression as in "wb1h", or 'R' for run-length encoding
+   as in "wb1R". (See the description of deflateInit2 for more information
+   about the strategy parameter.)
+
+     gzopen can be used to read a file which is not in gzip format; in this
+   case gzread will directly read from the file without decompression.
+
+     gzopen returns NULL if the file could not be opened or if there was
+   insufficient memory to allocate the (de)compression state; errno
+   can be checked to distinguish the two cases (if errno is zero, the
+   zlib error is Z_MEM_ERROR).  */
+
+ZEXTERN gzFile ZEXPORT gzdopen  OF((int fd, const char *mode));
+/*
+     gzdopen() associates a gzFile with the file descriptor fd.  File
+   descriptors are obtained from calls like open, dup, creat, pipe or
+   fileno (in the file has been previously opened with fopen).
+   The mode parameter is as in gzopen.
+     The next call of gzclose on the returned gzFile will also close the
+   file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
+   descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
+     gzdopen returns NULL if there was insufficient memory to allocate
+   the (de)compression state.
+*/
+
+ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
+/*
+     Dynamically update the compression level or strategy. See the description
+   of deflateInit2 for the meaning of these parameters.
+     gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
+   opened for writing.
+*/
+
+ZEXTERN int ZEXPORT    gzread  OF((gzFile file, voidp buf, unsigned len));
+/*
+     Reads the given number of uncompressed bytes from the compressed file.
+   If the input file was not in gzip format, gzread copies the given number
+   of bytes into the buffer.
+     gzread returns the number of uncompressed bytes actually read (0 for
+   end of file, -1 for error). */
+
+ZEXTERN int ZEXPORT    gzwrite OF((gzFile file,
+                                   voidpc buf, unsigned len));
+/*
+     Writes the given number of uncompressed bytes into the compressed file.
+   gzwrite returns the number of uncompressed bytes actually written
+   (0 in case of error).
+*/
+
+ZEXTERN int ZEXPORTVA   gzprintf OF((gzFile file, const char *format, ...));
+/*
+     Converts, formats, and writes the args to the compressed file under
+   control of the format string, as in fprintf. gzprintf returns the number of
+   uncompressed bytes actually written (0 in case of error).  The number of
+   uncompressed bytes written is limited to 4095. The caller should assure that
+   this limit is not exceeded. If it is exceeded, then gzprintf() will return
+   return an error (0) with nothing written. In this case, there may also be a
+   buffer overflow with unpredictable consequences, which is possible only if
+   zlib was compiled with the insecure functions sprintf() or vsprintf()
+   because the secure snprintf() or vsnprintf() functions were not available.
+*/
+
+ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
+/*
+      Writes the given null-terminated string to the compressed file, excluding
+   the terminating null character.
+      gzputs returns the number of characters written, or -1 in case of error.
+*/
+
+ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
+/*
+      Reads bytes from the compressed file until len-1 characters are read, or
+   a newline character is read and transferred to buf, or an end-of-file
+   condition is encountered.  The string is then terminated with a null
+   character.
+      gzgets returns buf, or Z_NULL in case of error.
+*/
+
+ZEXTERN int ZEXPORT    gzputc OF((gzFile file, int c));
+/*
+      Writes c, converted to an unsigned char, into the compressed file.
+   gzputc returns the value that was written, or -1 in case of error.
+*/
+
+ZEXTERN int ZEXPORT    gzgetc OF((gzFile file));
+/*
+      Reads one byte from the compressed file. gzgetc returns this byte
+   or -1 in case of end of file or error.
+*/
+
+ZEXTERN int ZEXPORT    gzungetc OF((int c, gzFile file));
+/*
+      Push one character back onto the stream to be read again later.
+   Only one character of push-back is allowed.  gzungetc() returns the
+   character pushed, or -1 on failure.  gzungetc() will fail if a
+   character has been pushed but not read yet, or if c is -1. The pushed
+   character will be discarded if the stream is repositioned with gzseek()
+   or gzrewind().
+*/
+
+ZEXTERN int ZEXPORT    gzflush OF((gzFile file, int flush));
+/*
+     Flushes all pending output into the compressed file. The parameter
+   flush is as in the deflate() function. The return value is the zlib
+   error number (see function gzerror below). gzflush returns Z_OK if
+   the flush parameter is Z_FINISH and all output could be flushed.
+     gzflush should be called only when strictly necessary because it can
+   degrade compression.
+*/
+
+ZEXTERN z_off_t ZEXPORT    gzseek OF((gzFile file,
+                                      z_off_t offset, int whence));
+/*
+      Sets the starting position for the next gzread or gzwrite on the
+   given compressed file. The offset represents a number of bytes in the
+   uncompressed data stream. The whence parameter is defined as in lseek(2);
+   the value SEEK_END is not supported.
+     If the file is opened for reading, this function is emulated but can be
+   extremely slow. If the file is opened for writing, only forward seeks are
+   supported; gzseek then compresses a sequence of zeroes up to the new
+   starting position.
+
+      gzseek returns the resulting offset location as measured in bytes from
+   the beginning of the uncompressed stream, or -1 in case of error, in
+   particular if the file is opened for writing and the new starting position
+   would be before the current position.
+*/
+
+ZEXTERN int ZEXPORT    gzrewind OF((gzFile file));
+/*
+     Rewinds the given file. This function is supported only for reading.
+
+   gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
+*/
+
+ZEXTERN z_off_t ZEXPORT    gztell OF((gzFile file));
+/*
+     Returns the starting position for the next gzread or gzwrite on the
+   given compressed file. This position represents a number of bytes in the
+   uncompressed data stream.
+
+   gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
+*/
+
+ZEXTERN int ZEXPORT gzeof OF((gzFile file));
+/*
+     Returns 1 when EOF has previously been detected reading the given
+   input stream, otherwise zero.
+*/
+
+ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
+/*
+     Returns 1 if file is being read directly without decompression, otherwise
+   zero.
+*/
+
+ZEXTERN int ZEXPORT    gzclose OF((gzFile file));
+/*
+     Flushes all pending output if necessary, closes the compressed file
+   and deallocates all the (de)compression state. The return value is the zlib
+   error number (see function gzerror below).
+*/
+
+ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
+/*
+     Returns the error message for the last error which occurred on the
+   given compressed file. errnum is set to zlib error number. If an
+   error occurred in the file system and not in the compression library,
+   errnum is set to Z_ERRNO and the application may consult errno
+   to get the exact error code.
+*/
+
+ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
+/*
+     Clears the error and end-of-file flags for file. This is analogous to the
+   clearerr() function in stdio. This is useful for continuing to read a gzip
+   file that is being written concurrently.
+*/
+
+                        /* checksum functions */
+
+/*
+     These functions are not related to compression but are exported
+   anyway because they might be useful in applications using the
+   compression library.
+*/
+
+ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
+/*
+     Update a running Adler-32 checksum with the bytes buf[0..len-1] and
+   return the updated checksum. If buf is NULL, this function returns
+   the required initial value for the checksum.
+   An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
+   much faster. Usage example:
+
+     uLong adler = adler32(0L, Z_NULL, 0);
+
+     while (read_buffer(buffer, length) != EOF) {
+       adler = adler32(adler, buffer, length);
+     }
+     if (adler != original_adler) error();
+*/
+
+ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
+                                          z_off_t len2));
+/*
+     Combine two Adler-32 checksums into one.  For two sequences of bytes, seq1
+   and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
+   each, adler1 and adler2.  adler32_combine() returns the Adler-32 checksum of
+   seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.
+*/
+
+ZEXTERN uLong ZEXPORT crc32   OF((uLong crc, const Bytef *buf, uInt len));
+/*
+     Update a running CRC-32 with the bytes buf[0..len-1] and return the
+   updated CRC-32. If buf is NULL, this function returns the required initial
+   value for the for the crc. Pre- and post-conditioning (one's complement) is
+   performed within this function so it shouldn't be done by the application.
+   Usage example:
+
+     uLong crc = crc32(0L, Z_NULL, 0);
+
+     while (read_buffer(buffer, length) != EOF) {
+       crc = crc32(crc, buffer, length);
+     }
+     if (crc != original_crc) error();
+*/
+
+ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));
+
+/*
+     Combine two CRC-32 check values into one.  For two sequences of bytes,
+   seq1 and seq2 with lengths len1 and len2, CRC-32 check values were
+   calculated for each, crc1 and crc2.  crc32_combine() returns the CRC-32
+   check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and
+   len2.
+*/
+
+
+                        /* various hacks, don't look :) */
+
+/* deflateInit and inflateInit are macros to allow checking the zlib version
+ * and the compiler's view of z_stream:
+ */
+ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level,
+                                     const char *version, int stream_size));
+ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm,
+                                     const char *version, int stream_size));
+ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int  level, int  method,
+                                      int windowBits, int memLevel,
+                                      int strategy, const char *version,
+                                      int stream_size));
+ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int  windowBits,
+                                      const char *version, int stream_size));
+ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
+                                         unsigned char FAR *window,
+                                         const char *version,
+                                         int stream_size));
+#define deflateInit(strm, level) \
+        deflateInit_((strm), (level),       ZLIB_VERSION, sizeof(z_stream))
+#define inflateInit(strm) \
+        inflateInit_((strm),                ZLIB_VERSION, sizeof(z_stream))
+#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
+        deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
+                      (strategy),           ZLIB_VERSION, sizeof(z_stream))
+#define inflateInit2(strm, windowBits) \
+        inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
+#define inflateBackInit(strm, windowBits, window) \
+        inflateBackInit_((strm), (windowBits), (window), \
+        ZLIB_VERSION, sizeof(z_stream))
+
+
+#if !defined(_ZUTIL_H) && !defined(NO_DUMMY_DECL)
+    struct internal_state {int dummy;}; /* hack for buggy compilers */
+#endif
+
+ZEXTERN const char   * ZEXPORT zError           OF((int));
+ZEXTERN int            ZEXPORT inflateSyncPoint OF((z_streamp z));
+ZEXTERN const uLongf * ZEXPORT get_crc_table    OF((void));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ZLIB_H */
diff --git a/uts/common/zmod/zmod.c b/uts/common/zmod/zmod.c
new file mode 100644
index 000000000000..d22f5950826c
--- /dev/null
+++ b/uts/common/zmod/zmod.c
@@ -0,0 +1,113 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/modctl.h>
+#include <sys/zmod.h>
+
+#include "zlib.h"
+#include "zutil.h"
+
+/*
+ * Uncompress the buffer 'src' into the buffer 'dst'.  The caller must store
+ * the expected decompressed data size externally so it can be passed in.
+ * The resulting decompressed size is then returned through dstlen.  This
+ * function return Z_OK on success, or another error code on failure.
+ */
+int
+z_uncompress(void *dst, size_t *dstlen, const void *src, size_t srclen)
+{
+	z_stream zs;
+	int err;
+
+	bzero(&zs, sizeof (zs));
+	zs.next_in = (uchar_t *)src;
+	zs.avail_in = srclen;
+	zs.next_out = dst;
+	zs.avail_out = *dstlen;
+
+	/*
+	 * Call inflateInit2() specifying a window size of DEF_WBITS
+	 * with the 6th bit set to indicate that the compression format
+	 * type (zlib or gzip) should be automatically detected.
+	 */
+	if ((err = inflateInit2(&zs, DEF_WBITS | 0x20)) != Z_OK)
+		return (err);
+
+	if ((err = inflate(&zs, Z_FINISH)) != Z_STREAM_END) {
+		(void) inflateEnd(&zs);
+		return (err == Z_OK ? Z_BUF_ERROR : err);
+	}
+
+	*dstlen = zs.total_out;
+	return (inflateEnd(&zs));
+}
+
+int
+z_compress_level(void *dst, size_t *dstlen, const void *src, size_t srclen,
+    int level)
+{
+
+	z_stream zs;
+	int err;
+
+	bzero(&zs, sizeof (zs));
+	zs.next_in = (uchar_t *)src;
+	zs.avail_in = srclen;
+	zs.next_out = dst;
+	zs.avail_out = *dstlen;
+
+	if ((err = deflateInit(&zs, level)) != Z_OK)
+		return (err);
+
+	if ((err = deflate(&zs, Z_FINISH)) != Z_STREAM_END) {
+		(void) deflateEnd(&zs);
+		return (err == Z_OK ? Z_BUF_ERROR : err);
+	}
+
+	*dstlen = zs.total_out;
+	return (deflateEnd(&zs));
+}
+
+int
+z_compress(void *dst, size_t *dstlen, const void *src, size_t srclen)
+{
+	return (z_compress_level(dst, dstlen, src, srclen,
+	    Z_DEFAULT_COMPRESSION));
+}
+
+/*
+ * Convert a zlib error code into a string error message.
+ */
+const char *
+z_strerror(int err)
+{
+	int i = Z_NEED_DICT - err;
+
+	if (i < 0 || i > Z_NEED_DICT - Z_VERSION_ERROR)
+		return ("unknown error");
+
+	return (zError(err));
+}
diff --git a/uts/common/zmod/zmod_subr.c b/uts/common/zmod/zmod_subr.c
new file mode 100644
index 000000000000..000925753fd7
--- /dev/null
+++ b/uts/common/zmod/zmod_subr.c
@@ -0,0 +1,85 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/systm.h>
+#include <sys/cmn_err.h>
+#include <sys/kobj.h>
+#include <sys/kobj_impl.h>
+
+struct zchdr {
+	uint_t zch_magic;
+	uint_t zch_size;
+};
+
+#define	ZCH_MAGIC	0x3cc13cc1
+
+/*ARGSUSED*/
+void *
+zcalloc(void *opaque, uint_t items, uint_t size)
+{
+	size_t nbytes = sizeof (struct zchdr) + items * size;
+	struct zchdr *z = kobj_zalloc(nbytes, KM_NOWAIT|KM_TMP);
+
+	if (z == NULL)
+		return (NULL);
+
+	z->zch_magic = ZCH_MAGIC;
+	z->zch_size = nbytes;
+
+	return (z + 1);
+}
+
+/*ARGSUSED*/
+void
+zcfree(void *opaque, void *ptr)
+{
+	struct zchdr *z = ((struct zchdr *)ptr) - 1;
+
+	if (z->zch_magic != ZCH_MAGIC)
+		panic("zcfree region corrupt: hdr=%p ptr=%p", (void *)z, ptr);
+
+	kobj_free(z, z->zch_size);
+}
+
+void
+zmemcpy(void *dest, const void *source, uint_t len)
+{
+	bcopy(source, dest, len);
+}
+
+int
+zmemcmp(const void *s1, const void *s2, uint_t len)
+{
+	return (bcmp(s1, s2, len));
+}
+
+void
+zmemzero(void *dest, uint_t len)
+{
+	bzero(dest, len);
+}
diff --git a/uts/common/zmod/zutil.c b/uts/common/zmod/zutil.c
new file mode 100644
index 000000000000..7d46e30b3edf
--- /dev/null
+++ b/uts/common/zmod/zutil.c
@@ -0,0 +1,324 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/* zutil.c -- target dependent utility functions for the compression library
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include "zutil.h"
+
+#ifndef NO_DUMMY_DECL
+struct internal_state      {int dummy;}; /* for buggy compilers */
+#endif
+
+const char * const z_errmsg[10] = {
+"need dictionary",     /* Z_NEED_DICT       2  */
+"stream end",          /* Z_STREAM_END      1  */
+"",                    /* Z_OK              0  */
+"file error",          /* Z_ERRNO         (-1) */
+"stream error",        /* Z_STREAM_ERROR  (-2) */
+"data error",          /* Z_DATA_ERROR    (-3) */
+"insufficient memory", /* Z_MEM_ERROR     (-4) */
+"buffer error",        /* Z_BUF_ERROR     (-5) */
+"incompatible version",/* Z_VERSION_ERROR (-6) */
+""};
+
+
+const char * ZEXPORT zlibVersion()
+{
+    return ZLIB_VERSION;
+}
+
+uLong ZEXPORT zlibCompileFlags()
+{
+    uLong flags;
+
+    flags = 0;
+    switch (sizeof(uInt)) {
+    case 2:     break;
+    case 4:     flags += 1;     break;
+    case 8:     flags += 2;     break;
+    default:    flags += 3;
+    }
+    switch (sizeof(uLong)) {
+    case 2:     break;
+    case 4:     flags += 1 << 2;        break;
+    case 8:     flags += 2 << 2;        break;
+    default:    flags += 3 << 2;
+    }
+    switch (sizeof(voidpf)) {
+    case 2:     break;
+    case 4:     flags += 1 << 4;        break;
+    case 8:     flags += 2 << 4;        break;
+    default:    flags += 3 << 4;
+    }
+    switch (sizeof(z_off_t)) {
+    case 2:     break;
+    case 4:     flags += 1 << 6;        break;
+    case 8:     flags += 2 << 6;        break;
+    default:    flags += 3 << 6;
+    }
+#ifdef DEBUG
+    flags += 1 << 8;
+#endif
+#if defined(ASMV) || defined(ASMINF)
+    flags += 1 << 9;
+#endif
+#ifdef ZLIB_WINAPI
+    flags += 1 << 10;
+#endif
+#ifdef BUILDFIXED
+    flags += 1 << 12;
+#endif
+#ifdef DYNAMIC_CRC_TABLE
+    flags += 1 << 13;
+#endif
+#ifdef NO_GZCOMPRESS
+    flags += 1L << 16;
+#endif
+#ifdef NO_GZIP
+    flags += 1L << 17;
+#endif
+#ifdef PKZIP_BUG_WORKAROUND
+    flags += 1L << 20;
+#endif
+#ifdef FASTEST
+    flags += 1L << 21;
+#endif
+#ifdef STDC
+#  ifdef NO_vsnprintf
+        flags += 1L << 25;
+#    ifdef HAS_vsprintf_void
+        flags += 1L << 26;
+#    endif
+#  else
+#    ifdef HAS_vsnprintf_void
+        flags += 1L << 26;
+#    endif
+#  endif
+#else
+        flags += 1L << 24;
+#  ifdef NO_snprintf
+        flags += 1L << 25;
+#    ifdef HAS_sprintf_void
+        flags += 1L << 26;
+#    endif
+#  else
+#    ifdef HAS_snprintf_void
+        flags += 1L << 26;
+#    endif
+#  endif
+#endif
+    return flags;
+}
+
+#ifdef DEBUG
+
+#  ifndef verbose
+#    define verbose 0
+#  endif
+int z_verbose = verbose;
+
+void z_error (m)
+    char *m;
+{
+    fprintf(stderr, "%s\n", m);
+    exit(1);
+}
+#endif
+
+/* exported to allow conversion of error code to string for compress() and
+ * uncompress()
+ */
+const char * ZEXPORT zError(err)
+    int err;
+{
+    return ERR_MSG(err);
+}
+
+#if defined(_WIN32_WCE)
+    /* The Microsoft C Run-Time Library for Windows CE doesn't have
+     * errno.  We define it as a global variable to simplify porting.
+     * Its value is always 0 and should not be used.
+     */
+    int errno = 0;
+#endif
+
+#define	HAVE_MEMCPY
+#ifndef HAVE_MEMCPY
+
+void zmemcpy(dest, source, len)
+    Bytef* dest;
+    const Bytef* source;
+    uInt  len;
+{
+    if (len == 0) return;
+    do {
+        *dest++ = *source++; /* ??? to be unrolled */
+    } while (--len != 0);
+}
+
+int zmemcmp(s1, s2, len)
+    const Bytef* s1;
+    const Bytef* s2;
+    uInt  len;
+{
+    uInt j;
+
+    for (j = 0; j < len; j++) {
+        if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
+    }
+    return 0;
+}
+
+void zmemzero(dest, len)
+    Bytef* dest;
+    uInt  len;
+{
+    if (len == 0) return;
+    do {
+        *dest++ = 0;  /* ??? to be unrolled */
+    } while (--len != 0);
+}
+#endif
+
+
+#ifdef SYS16BIT
+
+#ifdef __TURBOC__
+/* Turbo C in 16-bit mode */
+
+#  define MY_ZCALLOC
+
+/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
+ * and farmalloc(64K) returns a pointer with an offset of 8, so we
+ * must fix the pointer. Warning: the pointer must be put back to its
+ * original form in order to free it, use zcfree().
+ */
+
+#define MAX_PTR 10
+/* 10*64K = 640K */
+
+local int next_ptr = 0;
+
+typedef struct ptr_table_s {
+    voidpf org_ptr;
+    voidpf new_ptr;
+} ptr_table;
+
+local ptr_table table[MAX_PTR];
+/* This table is used to remember the original form of pointers
+ * to large buffers (64K). Such pointers are normalized with a zero offset.
+ * Since MSDOS is not a preemptive multitasking OS, this table is not
+ * protected from concurrent access. This hack doesn't work anyway on
+ * a protected system like OS/2. Use Microsoft C instead.
+ */
+
+voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
+{
+    voidpf buf = opaque; /* just to make some compilers happy */
+    ulg bsize = (ulg)items*size;
+
+    /* If we allocate less than 65520 bytes, we assume that farmalloc
+     * will return a usable pointer which doesn't have to be normalized.
+     */
+    if (bsize < 65520L) {
+        buf = farmalloc(bsize);
+        if (*(ush*)&buf != 0) return buf;
+    } else {
+        buf = farmalloc(bsize + 16L);
+    }
+    if (buf == NULL || next_ptr >= MAX_PTR) return NULL;
+    table[next_ptr].org_ptr = buf;
+
+    /* Normalize the pointer to seg:0 */
+    *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;
+    *(ush*)&buf = 0;
+    table[next_ptr++].new_ptr = buf;
+    return buf;
+}
+
+void  zcfree (voidpf opaque, voidpf ptr)
+{
+    int n;
+    if (*(ush*)&ptr != 0) { /* object < 64K */
+        farfree(ptr);
+        return;
+    }
+    /* Find the original pointer */
+    for (n = 0; n < next_ptr; n++) {
+        if (ptr != table[n].new_ptr) continue;
+
+        farfree(table[n].org_ptr);
+        while (++n < next_ptr) {
+            table[n-1] = table[n];
+        }
+        next_ptr--;
+        return;
+    }
+    ptr = opaque; /* just to make some compilers happy */
+    Assert(0, "zcfree: ptr not found");
+}
+
+#endif /* __TURBOC__ */
+
+
+#ifdef M_I86
+/* Microsoft C in 16-bit mode */
+
+#  define MY_ZCALLOC
+
+#if (!defined(_MSC_VER) || (_MSC_VER <= 600))
+#  define _halloc  halloc
+#  define _hfree   hfree
+#endif
+
+voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
+{
+    if (opaque) opaque = 0; /* to make compiler happy */
+    return _halloc((long)items, size);
+}
+
+void  zcfree (voidpf opaque, voidpf ptr)
+{
+    if (opaque) opaque = 0; /* to make compiler happy */
+    _hfree(ptr);
+}
+
+#endif /* M_I86 */
+
+#endif /* SYS16BIT */
+
+
+#ifndef MY_ZCALLOC /* Any system without a special alloc function */
+
+#ifndef STDC
+extern voidp  malloc OF((uInt size));
+extern voidp  calloc OF((uInt items, uInt size));
+extern void   free   OF((voidpf ptr));
+#endif
+
+voidpf zcalloc (opaque, items, size)
+    voidpf opaque;
+    unsigned items;
+    unsigned size;
+{
+    if (opaque) items += size - size; /* make compiler happy */
+    return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
+                              (voidpf)calloc(items, size);
+}
+
+void  zcfree (opaque, ptr)
+    voidpf opaque;
+    voidpf ptr;
+{
+    free(ptr);
+    if (opaque) return; /* make compiler happy */
+}
+
+#endif /* MY_ZCALLOC */
diff --git a/uts/common/zmod/zutil.h b/uts/common/zmod/zutil.h
new file mode 100644
index 000000000000..1d02c1d09783
--- /dev/null
+++ b/uts/common/zmod/zutil.h
@@ -0,0 +1,274 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/* zutil.h -- internal interface and configuration of the compression library
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+#ifndef _ZUTIL_H
+#define _ZUTIL_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#define ZLIB_INTERNAL
+#include "zlib.h"
+
+#ifdef STDC
+#  ifndef _WIN32_WCE
+#    include <stddef.h>
+#  endif
+#  include <string.h>
+#  include <stdlib.h>
+#endif
+#ifdef NO_ERRNO_H
+#   ifdef _WIN32_WCE
+      /* The Microsoft C Run-Time Library for Windows CE doesn't have
+       * errno.  We define it as a global variable to simplify porting.
+       * Its value is always 0 and should not be used.  We rename it to
+       * avoid conflict with other libraries that use the same workaround.
+       */
+#     define errno z_errno
+#   endif
+    extern int errno;
+#else
+#  ifndef _WIN32_WCE
+#    include <sys/errno.h>
+#  endif
+#endif
+
+#ifndef local
+#  define local static
+#endif
+/* compile with -Dlocal if your debugger can't find static symbols */
+
+typedef unsigned char  uch;
+typedef uch FAR uchf;
+typedef unsigned short ush;
+typedef ush FAR ushf;
+typedef unsigned long  ulg;
+
+extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
+/* (size given to avoid silly warnings with Visual C++) */
+
+#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
+
+#define ERR_RETURN(strm,err) \
+  return (strm->msg = (char*)ERR_MSG(err), (err))
+/* To be used only when the state is known to be valid */
+
+        /* common constants */
+
+#ifndef DEF_WBITS
+#  define DEF_WBITS MAX_WBITS
+#endif
+/* default windowBits for decompression. MAX_WBITS is for compression only */
+
+#if MAX_MEM_LEVEL >= 8
+#  define DEF_MEM_LEVEL 8
+#else
+#  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
+#endif
+/* default memLevel */
+
+#define STORED_BLOCK 0
+#define STATIC_TREES 1
+#define DYN_TREES    2
+/* The three kinds of block type */
+
+#define MIN_MATCH  3
+#define MAX_MATCH  258
+/* The minimum and maximum match lengths */
+
+#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
+
+        /* target dependencies */
+
+#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
+#  define OS_CODE  0x00
+#  if defined(__TURBOC__) || defined(__BORLANDC__)
+#    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
+       /* Allow compilation with ANSI keywords only enabled */
+       void _Cdecl farfree( void *block );
+       void *_Cdecl farmalloc( unsigned long nbytes );
+#    else
+#      include <alloc.h>
+#    endif
+#  else /* MSC or DJGPP */
+#    include <malloc.h>
+#  endif
+#endif
+
+#ifdef AMIGA
+#  define OS_CODE  0x01
+#endif
+
+#if defined(VAXC) || defined(VMS)
+#  define OS_CODE  0x02
+#  define F_OPEN(name, mode) \
+     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
+#endif
+
+#if defined(ATARI) || defined(atarist)
+#  define OS_CODE  0x05
+#endif
+
+#ifdef OS2
+#  define OS_CODE  0x06
+#  ifdef M_I86
+     #include <malloc.h>
+#  endif
+#endif
+
+#if defined(MACOS) || defined(TARGET_OS_MAC)
+#  define OS_CODE  0x07
+#  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+#    include <unix.h> /* for fdopen */
+#  else
+#    ifndef fdopen
+#      define fdopen(fd,mode) NULL /* No fdopen() */
+#    endif
+#  endif
+#endif
+
+#ifdef TOPS20
+#  define OS_CODE  0x0a
+#endif
+
+#ifdef WIN32
+#  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
+#    define OS_CODE  0x0b
+#  endif
+#endif
+
+#ifdef __50SERIES /* Prime/PRIMOS */
+#  define OS_CODE  0x0f
+#endif
+
+#if defined(_BEOS_) || defined(RISCOS)
+#  define fdopen(fd,mode) NULL /* No fdopen() */
+#endif
+
+#if (defined(_MSC_VER) && (_MSC_VER > 600))
+#  if defined(_WIN32_WCE)
+#    define fdopen(fd,mode) NULL /* No fdopen() */
+#    ifndef _PTRDIFF_T_DEFINED
+       typedef int ptrdiff_t;
+#      define _PTRDIFF_T_DEFINED
+#    endif
+#  else
+#    define fdopen(fd,type)  _fdopen(fd,type)
+#  endif
+#endif
+
+        /* common defaults */
+
+#ifndef OS_CODE
+#  define OS_CODE  0x03  /* assume Unix */
+#endif
+
+#ifndef F_OPEN
+#  define F_OPEN(name, mode) fopen((name), (mode))
+#endif
+
+         /* functions */
+
+#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
+#  ifndef HAVE_VSNPRINTF
+#    define HAVE_VSNPRINTF
+#  endif
+#endif
+#if defined(__CYGWIN__)
+#  ifndef HAVE_VSNPRINTF
+#    define HAVE_VSNPRINTF
+#  endif
+#endif
+#ifndef HAVE_VSNPRINTF
+#  ifdef MSDOS
+     /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
+        but for now we just assume it doesn't. */
+#    define NO_vsnprintf
+#  endif
+#  ifdef __TURBOC__
+#    define NO_vsnprintf
+#  endif
+#  ifdef WIN32
+     /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
+#    if !defined(vsnprintf) && !defined(NO_vsnprintf)
+#      define vsnprintf _vsnprintf
+#    endif
+#  endif
+#  ifdef __SASC
+#    define NO_vsnprintf
+#  endif
+#endif
+#ifdef VMS
+#  define NO_vsnprintf
+#endif
+
+#if defined(pyr)
+#  define NO_MEMCPY
+#endif
+#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
+ /* Use our own functions for small and medium model with MSC <= 5.0.
+  * You may have to use the same strategy for Borland C (untested).
+  * The __SC__ check is for Symantec.
+  */
+#  define NO_MEMCPY
+#endif
+#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
+#  define HAVE_MEMCPY
+#endif
+#ifdef HAVE_MEMCPY
+#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
+#    define zmemcpy _fmemcpy
+#    define zmemcmp _fmemcmp
+#    define zmemzero(dest, len) _fmemset(dest, 0, len)
+#  else
+#    define zmemcpy memcpy
+#    define zmemcmp memcmp
+#    define zmemzero(dest, len) memset(dest, 0, len)
+#  endif
+#else
+   extern void zmemcpy  OF((void* dest, const void* source, uInt len));
+   extern int  zmemcmp  OF((const void* s1, const void* s2, uInt len));
+   extern void zmemzero OF((void* dest, uInt len));
+#endif
+
+/* Diagnostic functions */
+#ifdef DEBUG
+#  include <stdio.h>
+   extern int z_verbose;
+   extern void z_error    OF((char *m));
+#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
+#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
+#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
+#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
+#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
+#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
+#else
+#  define Assert(cond,msg)
+#  define Trace(x)
+#  define Tracev(x)
+#  define Tracevv(x)
+#  define Tracec(c,x)
+#  define Tracecv(c,x)
+#endif
+
+
+voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
+void   zcfree  OF((voidpf opaque, voidpf ptr));
+
+#define ZALLOC(strm, items, size) \
+           (*((strm)->zalloc))((strm)->opaque, (items), (size))
+#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
+#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
+
+#endif /* _ZUTIL_H */