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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2007 Ulf Lilleengen
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#define _WANT_MOUNT
#include <sys/mount.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <sys/vnode.h>
#define _WANT_ZNODE
#include <sys/zfs_context.h>
#include <sys/zfs_znode.h>
#include <netinet/in.h>
#include <err.h>
#include <kvm.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#define ZFS
#include "libprocstat.h"
#include "common_kvm.h"
int
zfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
{
struct mount mount, *mountptr;
znode_t *kznodeptr, *znode;
size_t len;
int size;
len = sizeof(size);
if (sysctlbyname("debug.sizeof.znode", &size, &len, NULL, 0) == -1) {
warnx("error getting sysctl");
return (1);
}
znode = malloc(size);
if (znode == NULL) {
warnx("error allocating memory for znode storage");
return (1);
}
if ((size_t)size != sizeof(znode_t))
warnx("znode_t size mismatch, data could be wrong");
if ((size_t)size < offsetof(znode_t, z_id) + sizeof(znode->z_id) ||
(size_t)size < offsetof(znode_t, z_mode) + sizeof(znode->z_mode) ||
(size_t)size < offsetof(znode_t, z_size) + sizeof(znode->z_size)) {
warnx("znode_t size is too small");
goto bad;
}
/*
* OpenZFS's libspl provides a dummy sys/vnode.h that shadows ours so
* struct vnode is an incomplete type. Use the wrapper until that is
* resolved.
*/
kznodeptr = getvnodedata(vp);
if (!kvm_read_all(kd, (unsigned long)kznodeptr, znode, (size_t)size)) {
warnx("can't read znode at %p", (void *)kznodeptr);
goto bad;
}
/* Get the mount pointer, and read from the address. */
mountptr = getvnodemount(vp);
if (!kvm_read_all(kd, (unsigned long)mountptr, &mount, sizeof(mount))) {
warnx("can't read mount at %p", (void *)mountptr);
goto bad;
}
/*
* XXX Assume that this is a znode, but it can be a special node
* under .zfs/.
*/
vn->vn_fsid = mount.mnt_stat.f_fsid.val[0];
vn->vn_fileid = znode->z_id;
vn->vn_mode = znode->z_mode;
vn->vn_size = znode->z_size;
return (0);
bad:
return (1);
}
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