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-rw-r--r--include/linux/lockd/lockd.h401
1 files changed, 0 insertions, 401 deletions
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
deleted file mode 100644
index eebcecd12fae..000000000000
--- a/include/linux/lockd/lockd.h
+++ /dev/null
@@ -1,401 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * linux/include/linux/lockd/lockd.h
- *
- * General-purpose lockd include file.
- *
- * Copyright (C) 1996 Olaf Kirch <okir@monad.swb.de>
- */
-
-#ifndef LINUX_LOCKD_LOCKD_H
-#define LINUX_LOCKD_LOCKD_H
-
-/* XXX: a lot of this should really be under fs/lockd. */
-
-#include <linux/exportfs.h>
-#include <linux/in.h>
-#include <linux/in6.h>
-#include <net/ipv6.h>
-#include <linux/fs.h>
-#include <linux/kref.h>
-#include <linux/refcount.h>
-#include <linux/utsname.h>
-#include <linux/lockd/bind.h>
-#include <linux/lockd/xdr.h>
-#include <linux/lockd/debug.h>
-#include <linux/sunrpc/svc.h>
-
-/*
- * Version string
- */
-#define LOCKD_VERSION "0.5"
-
-/*
- * Default timeout for RPC calls (seconds)
- */
-#define LOCKD_DFLT_TIMEO 10
-
-/*
- * Internal-use status codes, not to be placed on the wire.
- * Version handlers translate these to appropriate wire values.
- */
-#define nlm__int__drop_reply cpu_to_be32(30000)
-#define nlm__int__deadlock cpu_to_be32(30001)
-#define nlm__int__stale_fh cpu_to_be32(30002)
-#define nlm__int__failed cpu_to_be32(30003)
-
-/*
- * Lockd host handle (used both by the client and server personality).
- */
-struct nlm_host {
- struct hlist_node h_hash; /* doubly linked list */
- struct sockaddr_storage h_addr; /* peer address */
- size_t h_addrlen;
- struct sockaddr_storage h_srcaddr; /* our address (optional) */
- size_t h_srcaddrlen;
- struct rpc_clnt *h_rpcclnt; /* RPC client to talk to peer */
- char *h_name; /* remote hostname */
- u32 h_version; /* interface version */
- unsigned short h_proto; /* transport proto */
- unsigned short h_reclaiming : 1,
- h_server : 1, /* server side, not client side */
- h_noresvport : 1,
- h_inuse : 1;
- wait_queue_head_t h_gracewait; /* wait while reclaiming */
- struct rw_semaphore h_rwsem; /* Reboot recovery lock */
- u32 h_state; /* pseudo-state counter */
- u32 h_nsmstate; /* true remote NSM state */
- u32 h_pidcount; /* Pseudopids */
- refcount_t h_count; /* reference count */
- struct mutex h_mutex; /* mutex for pmap binding */
- unsigned long h_nextrebind; /* next portmap call */
- unsigned long h_expires; /* eligible for GC */
- struct list_head h_lockowners; /* Lockowners for the client */
- spinlock_t h_lock;
- struct list_head h_granted; /* Locks in GRANTED state */
- struct list_head h_reclaim; /* Locks in RECLAIM state */
- struct nsm_handle *h_nsmhandle; /* NSM status handle */
- char *h_addrbuf; /* address eyecatcher */
- struct net *net; /* host net */
- const struct cred *h_cred;
- char nodename[UNX_MAXNODENAME + 1];
- const struct nlmclnt_operations *h_nlmclnt_ops; /* Callback ops for NLM users */
-};
-
-/*
- * The largest string sm_addrbuf should hold is a full-size IPv6 address
- * (no "::" anywhere) with a scope ID. The buffer size is computed to
- * hold eight groups of colon-separated four-hex-digit numbers, a
- * percent sign, a scope id (at most 32 bits, in decimal), and NUL.
- */
-#define NSM_ADDRBUF ((8 * 4 + 7) + (1 + 10) + 1)
-
-struct nsm_handle {
- struct list_head sm_link;
- refcount_t sm_count;
- char *sm_mon_name;
- char *sm_name;
- struct sockaddr_storage sm_addr;
- size_t sm_addrlen;
- unsigned int sm_monitored : 1,
- sm_sticky : 1; /* don't unmonitor */
- struct nsm_private sm_priv;
- char sm_addrbuf[NSM_ADDRBUF];
-};
-
-/*
- * Rigorous type checking on sockaddr type conversions
- */
-static inline struct sockaddr *nlm_addr(const struct nlm_host *host)
-{
- return (struct sockaddr *)&host->h_addr;
-}
-
-static inline struct sockaddr *nlm_srcaddr(const struct nlm_host *host)
-{
- return (struct sockaddr *)&host->h_srcaddr;
-}
-
-/*
- * Map an fl_owner_t into a unique 32-bit "pid"
- */
-struct nlm_lockowner {
- struct list_head list;
- refcount_t count;
-
- struct nlm_host *host;
- fl_owner_t owner;
- uint32_t pid;
-};
-
-/*
- * This is the representation of a blocked client lock.
- */
-struct nlm_wait {
- struct list_head b_list; /* linked list */
- wait_queue_head_t b_wait; /* where to wait on */
- struct nlm_host *b_host;
- struct file_lock *b_lock; /* local file lock */
- __be32 b_status; /* grant callback status */
-};
-
-/*
- * Memory chunk for NLM client RPC request.
- */
-#define NLMCLNT_OHSIZE ((__NEW_UTS_LEN) + 10u)
-struct nlm_rqst {
- refcount_t a_count;
- unsigned int a_flags; /* initial RPC task flags */
- struct nlm_host * a_host; /* host handle */
- struct nlm_args a_args; /* arguments */
- struct nlm_res a_res; /* result */
- struct nlm_block * a_block;
- unsigned int a_retries; /* Retry count */
- u8 a_owner[NLMCLNT_OHSIZE];
- void * a_callback_data; /* sent to nlmclnt_operations callbacks */
-};
-
-struct nlm_share;
-
-/*
- * This struct describes a file held open by lockd on behalf of
- * an NFS client.
- */
-struct nlm_file {
- struct hlist_node f_list; /* linked list */
- struct nfs_fh f_handle; /* NFS file handle */
- struct file * f_file[2]; /* VFS file pointers,
- indexed by O_ flags */
- struct nlm_share * f_shares; /* DOS shares */
- struct list_head f_blocks; /* blocked locks */
- unsigned int f_locks; /* guesstimate # of locks */
- unsigned int f_count; /* reference count */
- struct mutex f_mutex; /* avoid concurrent access */
-};
-
-/*
- * This is a server block (i.e. a lock requested by some client which
- * couldn't be granted because of a conflicting lock).
- */
-#define NLM_NEVER (~(unsigned long) 0)
-/* timeout on non-blocking call: */
-#define NLM_TIMEOUT (7 * HZ)
-
-struct nlm_block {
- struct kref b_count; /* Reference count */
- struct list_head b_list; /* linked list of all blocks */
- struct list_head b_flist; /* linked list (per file) */
- struct nlm_rqst * b_call; /* RPC args & callback info */
- struct svc_serv * b_daemon; /* NLM service */
- struct nlm_host * b_host; /* host handle for RPC clnt */
- unsigned long b_when; /* next re-xmit */
- unsigned int b_id; /* block id */
- unsigned char b_granted; /* VFS granted lock */
- struct nlm_file * b_file; /* file in question */
- struct cache_req * b_cache_req; /* deferred request handling */
- struct cache_deferred_req * b_deferred_req;
- unsigned int b_flags; /* block flags */
-#define B_QUEUED 1 /* lock queued */
-#define B_GOT_CALLBACK 2 /* got lock or conflicting lock */
-#define B_TIMED_OUT 4 /* filesystem too slow to respond */
-};
-
-/*
- * Global variables
- */
-extern const struct rpc_program nlm_program;
-extern const struct svc_procedure nlmsvc_procedures[24];
-#ifdef CONFIG_LOCKD_V4
-extern const struct svc_procedure nlmsvc_procedures4[24];
-#endif
-extern int nlmsvc_grace_period;
-extern unsigned long nlm_timeout;
-extern bool nsm_use_hostnames;
-extern u32 nsm_local_state;
-
-extern struct timer_list nlmsvc_retry;
-
-/*
- * Lockd client functions
- */
-struct nlm_rqst * nlm_alloc_call(struct nlm_host *host);
-int nlm_async_call(struct nlm_rqst *, u32, const struct rpc_call_ops *);
-int nlm_async_reply(struct nlm_rqst *, u32, const struct rpc_call_ops *);
-void nlmclnt_release_call(struct nlm_rqst *);
-void nlmclnt_prepare_block(struct nlm_wait *block, struct nlm_host *host,
- struct file_lock *fl);
-void nlmclnt_queue_block(struct nlm_wait *block);
-__be32 nlmclnt_dequeue_block(struct nlm_wait *block);
-int nlmclnt_wait(struct nlm_wait *block, struct nlm_rqst *req, long timeout);
-__be32 nlmclnt_grant(const struct sockaddr *addr,
- const struct nlm_lock *lock);
-void nlmclnt_recovery(struct nlm_host *);
-int nlmclnt_reclaim(struct nlm_host *, struct file_lock *,
- struct nlm_rqst *);
-void nlmclnt_next_cookie(struct nlm_cookie *);
-
-#ifdef CONFIG_LOCKD_V4
-extern const struct rpc_version nlm_version4;
-#endif
-
-/*
- * Host cache
- */
-struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap,
- const size_t salen,
- const unsigned short protocol,
- const u32 version,
- const char *hostname,
- int noresvport,
- struct net *net,
- const struct cred *cred);
-void nlmclnt_release_host(struct nlm_host *);
-struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp,
- const char *hostname,
- const size_t hostname_len);
-void nlmsvc_release_host(struct nlm_host *);
-struct rpc_clnt * nlm_bind_host(struct nlm_host *);
-void nlm_rebind_host(struct nlm_host *);
-struct nlm_host * nlm_get_host(struct nlm_host *);
-void nlm_shutdown_hosts(void);
-void nlm_shutdown_hosts_net(struct net *net);
-void nlm_host_rebooted(const struct net *net,
- const struct nlm_reboot *);
-
-/*
- * Host monitoring
- */
-int nsm_monitor(const struct nlm_host *host);
-void nsm_unmonitor(const struct nlm_host *host);
-
-struct nsm_handle *nsm_get_handle(const struct net *net,
- const struct sockaddr *sap,
- const size_t salen,
- const char *hostname,
- const size_t hostname_len);
-struct nsm_handle *nsm_reboot_lookup(const struct net *net,
- const struct nlm_reboot *info);
-void nsm_release(struct nsm_handle *nsm);
-
-/*
- * This is used in garbage collection and resource reclaim
- * A return value != 0 means destroy the lock/block/share
- */
-typedef int (*nlm_host_match_fn_t)(void *cur, struct nlm_host *ref);
-
-/*
- * Server-side lock handling
- */
-int lock_to_openmode(struct file_lock *);
-__be32 nlmsvc_lock(struct svc_rqst *, struct nlm_file *,
- struct nlm_host *, struct nlm_lock *, int,
- struct nlm_cookie *, int);
-__be32 nlmsvc_unlock(struct net *net, struct nlm_file *, struct nlm_lock *);
-__be32 nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file,
- struct nlm_host *host, struct nlm_lock *lock,
- struct nlm_lock *conflock);
-__be32 nlmsvc_cancel_blocked(struct net *net, struct nlm_file *, struct nlm_lock *);
-void nlmsvc_retry_blocked(struct svc_rqst *rqstp);
-void nlmsvc_traverse_blocks(struct nlm_host *, struct nlm_file *,
- nlm_host_match_fn_t match);
-void nlmsvc_grant_reply(struct nlm_cookie *, __be32);
-void nlmsvc_release_call(struct nlm_rqst *);
-void nlmsvc_locks_init_private(struct file_lock *, struct nlm_host *, pid_t);
-
-/*
- * File handling for the server personality
- */
-__be32 nlm_lookup_file(struct svc_rqst *, struct nlm_file **,
- struct nlm_lock *);
-void nlm_release_file(struct nlm_file *);
-void nlmsvc_put_lockowner(struct nlm_lockowner *);
-void nlmsvc_release_lockowner(struct nlm_lock *);
-void nlmsvc_mark_resources(struct net *);
-void nlmsvc_free_host_resources(struct nlm_host *);
-void nlmsvc_invalidate_all(void);
-
-static inline struct file *nlmsvc_file_file(const struct nlm_file *file)
-{
- return file->f_file[O_RDONLY] ?
- file->f_file[O_RDONLY] : file->f_file[O_WRONLY];
-}
-
-static inline struct inode *nlmsvc_file_inode(struct nlm_file *file)
-{
- return file_inode(nlmsvc_file_file(file));
-}
-
-static inline bool
-nlmsvc_file_cannot_lock(const struct nlm_file *file)
-{
- return exportfs_cannot_lock(nlmsvc_file_file(file)->f_path.dentry->d_sb->s_export_op);
-}
-
-static inline int __nlm_privileged_request4(const struct sockaddr *sap)
-{
- const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
-
- if (ntohs(sin->sin_port) > 1023)
- return 0;
-
- return ipv4_is_loopback(sin->sin_addr.s_addr);
-}
-
-#if IS_ENABLED(CONFIG_IPV6)
-static inline int __nlm_privileged_request6(const struct sockaddr *sap)
-{
- const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
-
- if (ntohs(sin6->sin6_port) > 1023)
- return 0;
-
- if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_MAPPED)
- return ipv4_is_loopback(sin6->sin6_addr.s6_addr32[3]);
-
- return ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LOOPBACK;
-}
-#else /* IS_ENABLED(CONFIG_IPV6) */
-static inline int __nlm_privileged_request6(const struct sockaddr *sap)
-{
- return 0;
-}
-#endif /* IS_ENABLED(CONFIG_IPV6) */
-
-/*
- * Ensure incoming requests are from local privileged callers.
- *
- * Return TRUE if sender is local and is connecting via a privileged port;
- * otherwise return FALSE.
- */
-static inline int nlm_privileged_requester(const struct svc_rqst *rqstp)
-{
- const struct sockaddr *sap = svc_addr(rqstp);
-
- switch (sap->sa_family) {
- case AF_INET:
- return __nlm_privileged_request4(sap);
- case AF_INET6:
- return __nlm_privileged_request6(sap);
- default:
- return 0;
- }
-}
-
-/*
- * Compare two NLM locks.
- * When the second lock is of type F_UNLCK, this acts like a wildcard.
- */
-static inline int nlm_compare_locks(const struct file_lock *fl1,
- const struct file_lock *fl2)
-{
- return file_inode(fl1->c.flc_file) == file_inode(fl2->c.flc_file)
- && fl1->c.flc_pid == fl2->c.flc_pid
- && fl1->c.flc_owner == fl2->c.flc_owner
- && fl1->fl_start == fl2->fl_start
- && fl1->fl_end == fl2->fl_end
- &&(fl1->c.flc_type == fl2->c.flc_type || fl2->c.flc_type == F_UNLCK);
-}
-
-extern const struct lock_manager_operations nlmsvc_lock_operations;
-
-#endif /* LINUX_LOCKD_LOCKD_H */
generated by cgit v1.2.3 (git 2.25.1) at 2026-05-07 13:39:42 +0000