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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/include/linux/nfs_fs.h
3 *
4 * Copyright (C) 1992 Rick Sladkey
5 *
6 * OS-specific nfs filesystem definitions and declarations
7 */
8
9#ifndef _LINUX_NFS_FS_H
10#define _LINUX_NFS_FS_H
11
Jeff Garzike18fa702006-09-24 11:13:19 -040012#include <linux/magic.h>
13
David Woodhouse7f1cbe52006-09-12 20:36:02 -070014/* Default timeout values */
Trond Myklebust259875e2008-07-02 14:43:47 -040015#define NFS_DEF_UDP_TIMEO (11)
16#define NFS_DEF_UDP_RETRANS (3)
17#define NFS_DEF_TCP_TIMEO (600)
18#define NFS_DEF_TCP_RETRANS (2)
19
David Woodhouse7f1cbe52006-09-12 20:36:02 -070020#define NFS_MAX_UDP_TIMEOUT (60*HZ)
21#define NFS_MAX_TCP_TIMEOUT (600*HZ)
22
Chuck Lever0e0cab72008-06-26 17:47:12 -040023#define NFS_DEF_ACREGMIN (3)
24#define NFS_DEF_ACREGMAX (60)
25#define NFS_DEF_ACDIRMIN (30)
26#define NFS_DEF_ACDIRMAX (60)
27
David Woodhouse7f1cbe52006-09-12 20:36:02 -070028/*
David Woodhouse7f1cbe52006-09-12 20:36:02 -070029 * When flushing a cluster of dirty pages, there can be different
30 * strategies:
31 */
32#define FLUSH_SYNC 1 /* file being synced, or contention */
33#define FLUSH_STABLE 4 /* commit to stable storage */
34#define FLUSH_LOWPRI 8 /* low priority background flush */
35#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */
David Woodhouse7f1cbe52006-09-12 20:36:02 -070036
37#ifdef __KERNEL__
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/in.h>
40#include <linux/mm.h>
41#include <linux/pagemap.h>
Trond Myklebust1c3c07e2006-07-25 11:28:18 -040042#include <linux/rbtree.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/rwsem.h>
44#include <linux/wait.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/sunrpc/debug.h>
47#include <linux/sunrpc/auth.h>
48#include <linux/sunrpc/clnt.h>
49
50#include <linux/nfs.h>
51#include <linux/nfs2.h>
52#include <linux/nfs3.h>
53#include <linux/nfs4.h>
54#include <linux/nfs_xdr.h>
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -040055#include <linux/nfs_fs_sb.h>
56
Linus Torvalds1da177e2005-04-16 15:20:36 -070057#include <linux/mempool.h>
58
59/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 * These are the default flags for swap requests
61 */
62#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
63
Linus Torvalds1da177e2005-04-16 15:20:36 -070064/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 * NFSv3/v4 Access mode cache entry
66 */
67struct nfs_access_entry {
Trond Myklebust1c3c07e2006-07-25 11:28:18 -040068 struct rb_node rb_node;
Trond Myklebustcfcea3e2006-07-25 11:28:18 -040069 struct list_head lru;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 unsigned long jiffies;
71 struct rpc_cred * cred;
72 int mask;
73};
74
Trond Myklebustf11ac8d2010-06-25 16:35:53 -040075struct nfs_lock_context {
76 atomic_t count;
77 struct list_head list;
78 struct nfs_open_context *open_context;
79 fl_owner_t lockowner;
80 pid_t pid;
81};
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083struct nfs4_state;
84struct nfs_open_context {
Trond Myklebustf11ac8d2010-06-25 16:35:53 -040085 struct nfs_lock_context lock_context;
Trond Myklebust88be9f92007-06-05 10:42:27 -040086 struct path path;
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 struct rpc_cred *cred;
88 struct nfs4_state *state;
Trond Myklebustdc0b0272008-12-23 15:21:56 -050089 fmode_t mode;
Trond Myklebust7b159fc2007-07-25 14:09:54 -040090
91 unsigned long flags;
92#define NFS_CONTEXT_ERROR_WRITE (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 int error;
94
95 struct list_head list;
Olivier Galibert00a92642005-06-22 17:16:29 +000096
Olivier Galibert00a92642005-06-22 17:16:29 +000097 __u64 dir_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098};
99
100/*
101 * NFSv4 delegation
102 */
103struct nfs_delegation;
104
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000105struct posix_acl;
106
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107/*
108 * nfs fs inode data in memory
109 */
110struct nfs_inode {
111 /*
112 * The 64bit 'inode number'
113 */
114 __u64 fileid;
115
116 /*
117 * NFS file handle
118 */
119 struct nfs_fh fh;
120
121 /*
122 * Various flags
123 */
Chuck Lever412d5822005-08-18 11:24:11 -0700124 unsigned long flags; /* atomic bit ops */
125 unsigned long cache_validity; /* bit mask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127 /*
Goldwyn Rodrigues24bd68f2006-03-20 13:44:11 -0500128 * read_cache_jiffies is when we started read-caching this inode.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 * attrtimeo is for how long the cached information is assumed
130 * to be valid. A successful attribute revalidation doubles
131 * attrtimeo (up to acregmax/acdirmax), a failure resets it to
132 * acregmin/acdirmin.
133 *
134 * We need to revalidate the cached attrs for this inode if
135 *
Peter Staubach64672d52008-12-23 15:21:56 -0500136 * jiffies - read_cache_jiffies >= attrtimeo
137 *
138 * Please note the comparison is greater than or equal
139 * so that zero timeout values can be specified.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 unsigned long read_cache_jiffies;
142 unsigned long attrtimeo;
143 unsigned long attrtimeo_timestamp;
144 __u64 change_attr; /* v4 only */
145
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400146 unsigned long attr_gencount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 /* "Generation counter" for the attribute cache. This is
148 * bumped whenever we update the metadata on the
149 * server.
150 */
151 unsigned long cache_change_attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400153 struct rb_root access_cache;
Trond Myklebustcfcea3e2006-07-25 11:28:18 -0400154 struct list_head access_cache_entry_lru;
155 struct list_head access_cache_inode_lru;
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000156#ifdef CONFIG_NFS_V3_ACL
157 struct posix_acl *acl_access;
158 struct posix_acl *acl_default;
159#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
161 /*
162 * This is the cookie verifier used for NFSv3 readdir
163 * operations
164 */
Al Virobc4785c2006-10-19 23:28:51 -0700165 __be32 cookieverf[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
167 /*
168 * This is the list of dirty unwritten pages.
169 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 struct radix_tree_root nfs_page_tree;
171
Trond Myklebustfb8a1f12009-03-11 14:10:29 -0400172 unsigned long npages;
Trond Myklebustff778d02010-02-19 16:53:39 -0800173 unsigned long ncommit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175 /* Open contexts for shared mmap writes */
176 struct list_head open_files;
177
Trond Myklebust565277f2007-10-15 18:17:53 -0400178 /* Number of in-flight sillydelete RPC calls */
179 atomic_t silly_count;
180 /* List of deferred sillydelete requests */
181 struct hlist_head silly_list;
182 wait_queue_head_t waitqueue;
183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184#ifdef CONFIG_NFS_V4
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +0000185 struct nfs4_cached_acl *nfs4_acl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 /* NFSv4 state */
187 struct list_head open_states;
Arnd Bergmann5b222162010-03-03 10:20:10 +0100188 struct nfs_delegation __rcu *delegation;
Trond Myklebustbd7bf9d2008-12-23 15:21:53 -0500189 fmode_t delegation_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 struct rw_semaphore rwsem;
191#endif /* CONFIG_NFS_V4*/
David Howellsef79c092009-04-03 16:42:43 +0100192#ifdef CONFIG_NFS_FSCACHE
193 struct fscache_cookie *fscache;
194#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 struct inode vfs_inode;
196};
197
198/*
Chuck Lever55296802005-08-18 11:24:09 -0700199 * Cache validity bit flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 */
Chuck Lever55296802005-08-18 11:24:09 -0700201#define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */
202#define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */
203#define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */
204#define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */
205#define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */
206#define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */
Trond Myklebust412c77c2007-07-03 16:10:55 -0400207#define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */
Chuck Lever55296802005-08-18 11:24:09 -0700208
209/*
Chuck Lever412d5822005-08-18 11:24:11 -0700210 * Bit offsets in flags field
Chuck Lever55296802005-08-18 11:24:09 -0700211 */
Trond Myklebust691beb12008-10-05 14:48:22 -0400212#define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */
213#define NFS_INO_STALE (1) /* possible stale inode */
214#define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */
215#define NFS_INO_MOUNTPOINT (3) /* inode is remote mountpoint */
Trond Myklebust72cb77f2009-03-11 14:10:30 -0400216#define NFS_INO_FLUSHING (4) /* inode is flushing out data */
David Howellsef79c092009-04-03 16:42:43 +0100217#define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */
218#define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */
Trond Myklebust71d0a612010-04-22 15:35:57 -0400219#define NFS_INO_COMMIT (7) /* inode is committing unstable writes */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
Benny Halevy99fadcd2008-01-23 08:59:08 +0200221static inline struct nfs_inode *NFS_I(const struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222{
223 return container_of(inode, struct nfs_inode, vfs_inode);
224}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
Benny Halevy99fadcd2008-01-23 08:59:08 +0200226static inline struct nfs_server *NFS_SB(const struct super_block *s)
227{
228 return (struct nfs_server *)(s->s_fs_info);
229}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Benny Halevy99fadcd2008-01-23 08:59:08 +0200231static inline struct nfs_fh *NFS_FH(const struct inode *inode)
232{
233 return &NFS_I(inode)->fh;
234}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
Benny Halevy99fadcd2008-01-23 08:59:08 +0200236static inline struct nfs_server *NFS_SERVER(const struct inode *inode)
237{
238 return NFS_SB(inode->i_sb);
239}
240
241static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode)
242{
243 return NFS_SERVER(inode)->client;
244}
245
246static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode)
247{
248 return NFS_SERVER(inode)->nfs_client->rpc_ops;
249}
250
251static inline __be32 *NFS_COOKIEVERF(const struct inode *inode)
252{
253 return NFS_I(inode)->cookieverf;
254}
255
256static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode)
257{
258 struct nfs_server *nfss = NFS_SERVER(inode);
259 return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin;
260}
261
262static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode)
263{
264 struct nfs_server *nfss = NFS_SERVER(inode);
265 return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax;
266}
267
268static inline int NFS_STALE(const struct inode *inode)
269{
270 return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
271}
272
David Howellsef79c092009-04-03 16:42:43 +0100273static inline int NFS_FSCACHE(const struct inode *inode)
274{
275 return test_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags);
276}
277
Benny Halevy99fadcd2008-01-23 08:59:08 +0200278static inline __u64 NFS_FILEID(const struct inode *inode)
279{
280 return NFS_I(inode)->fileid;
281}
282
283static inline void set_nfs_fileid(struct inode *inode, __u64 fileid)
284{
285 NFS_I(inode)->fileid = fileid;
286}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
Trond Myklebustdecf4912005-10-27 22:12:39 -0400288static inline void nfs_mark_for_revalidate(struct inode *inode)
289{
Trond Myklebust38478b22006-05-25 01:40:57 -0400290 struct nfs_inode *nfsi = NFS_I(inode);
291
Trond Myklebustdecf4912005-10-27 22:12:39 -0400292 spin_lock(&inode->i_lock);
Trond Myklebust38478b22006-05-25 01:40:57 -0400293 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS;
Trond Myklebustf3821112007-10-01 10:00:23 -0400294 if (S_ISDIR(inode->i_mode))
Trond Myklebust38478b22006-05-25 01:40:57 -0400295 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
Trond Myklebustdecf4912005-10-27 22:12:39 -0400296 spin_unlock(&inode->i_lock);
297}
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299static inline int nfs_server_capable(struct inode *inode, int cap)
300{
301 return NFS_SERVER(inode)->caps & cap;
302}
303
304static inline int NFS_USE_READDIRPLUS(struct inode *inode)
305{
Benny Halevy3a10c302008-01-23 08:58:59 +0200306 return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307}
308
Trond Myklebustd75340c2007-10-01 21:42:01 -0400309static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf)
310{
311 dentry->d_time = verf;
312}
313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314/**
315 * nfs_save_change_attribute - Returns the inode attribute change cookie
Trond Myklebust8edb0182007-09-29 17:14:03 -0400316 * @dir - pointer to parent directory inode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 * The "change attribute" is updated every time we finish an operation
318 * that will result in a metadata change on the server.
319 */
Trond Myklebust8edb0182007-09-29 17:14:03 -0400320static inline unsigned long nfs_save_change_attribute(struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321{
Trond Myklebust8edb0182007-09-29 17:14:03 -0400322 return NFS_I(dir)->cache_change_attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323}
324
325/**
Trond Myklebust4b841732007-09-29 17:15:01 -0400326 * nfs_verify_change_attribute - Detects NFS remote directory changes
327 * @dir - pointer to parent directory inode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 * @chattr - previously saved change attribute
Trond Myklebust4b841732007-09-29 17:15:01 -0400329 * Return "false" if the verifiers doesn't match the change attribute.
330 * This would usually indicate that the directory contents have changed on
331 * the server, and that any dentries need revalidating.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 */
Trond Myklebust4b841732007-09-29 17:15:01 -0400333static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334{
Trond Myklebust4b841732007-09-29 17:15:01 -0400335 return chattr == NFS_I(dir)->cache_change_attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336}
337
338/*
339 * linux/fs/nfs/inode.c
340 */
Trond Myklebust29884df2005-12-13 16:13:54 -0500341extern int nfs_sync_mapping(struct address_space *mapping);
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700342extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343extern void nfs_zap_caches(struct inode *);
Trond Myklebustc4812992007-09-28 17:11:45 -0400344extern void nfs_invalidate_atime(struct inode *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
346 struct nfs_fattr *);
347extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400348extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
Trond Myklebust70ca8852007-09-30 15:21:24 -0400349extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
Al Viroe6305c42008-07-15 21:03:57 -0400351extern int nfs_permission(struct inode *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352extern int nfs_open(struct inode *, struct file *);
353extern int nfs_release(struct inode *, struct file *);
354extern int nfs_attribute_timeout(struct inode *inode);
355extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
356extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
Trond Myklebust44b11872006-05-25 01:40:59 -0400357extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358extern int nfs_setattr(struct dentry *, struct iattr *);
Trond Myklebust65e43082005-08-16 11:49:44 -0400359extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
361extern void put_nfs_open_context(struct nfs_open_context *ctx);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500362extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode);
Trond Myklebustf11ac8d2010-06-25 16:35:53 -0400363extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx);
364extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx);
Trond Myklebustf43bf0b2007-10-09 12:01:04 -0400365extern u64 nfs_compat_user_ino64(u64 fileid);
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400366extern void nfs_fattr_init(struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
Trond Myklebust2d36bfde2010-04-16 16:22:45 -0400368extern struct nfs_fattr *nfs_alloc_fattr(void);
369
370static inline void nfs_free_fattr(const struct nfs_fattr *fattr)
371{
372 kfree(fattr);
373}
374
375extern struct nfs_fh *nfs_alloc_fhandle(void);
376
377static inline void nfs_free_fhandle(const struct nfs_fh *fh)
378{
379 kfree(fh);
380}
381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
Al Viro5a874db2006-11-08 00:19:38 -0800383extern __be32 root_nfs_parse_addr(char *name); /*__init*/
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400384extern unsigned long nfs_inc_attr_generation_counter(void);
Trond Myklebust0e574af2005-10-27 22:12:38 -0400385
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386/*
387 * linux/fs/nfs/file.c
388 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800389extern const struct inode_operations nfs_file_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000390#ifdef CONFIG_NFS_V3
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800391extern const struct inode_operations nfs3_file_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000392#endif /* CONFIG_NFS_V3 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800393extern const struct file_operations nfs_file_operations;
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700394extern const struct address_space_operations nfs_file_aops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
Trond Myklebustc03025d2007-08-10 17:44:28 -0400396static inline struct nfs_open_context *nfs_file_open_context(struct file *filp)
397{
398 return filp->private_data;
399}
400
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401static inline struct rpc_cred *nfs_file_cred(struct file *file)
402{
Neil Brown504e5182008-10-16 14:15:16 +1100403 if (file != NULL) {
404 struct nfs_open_context *ctx =
405 nfs_file_open_context(file);
406 if (ctx)
407 return ctx->cred;
408 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 return NULL;
410}
411
412/*
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000413 * linux/fs/nfs/xattr.c
414 */
415#ifdef CONFIG_NFS_V3_ACL
416extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
417extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
418extern int nfs3_setxattr(struct dentry *, const char *,
419 const void *, size_t, int);
420extern int nfs3_removexattr (struct dentry *, const char *name);
421#else
422# define nfs3_listxattr NULL
423# define nfs3_getxattr NULL
424# define nfs3_setxattr NULL
425# define nfs3_removexattr NULL
426#endif
427
428/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 * linux/fs/nfs/direct.c
430 */
431extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
432 unsigned long);
Badari Pulavarty027445c2006-09-30 23:28:46 -0700433extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
434 const struct iovec *iov, unsigned long nr_segs,
435 loff_t pos);
436extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
437 const struct iovec *iov, unsigned long nr_segs,
438 loff_t pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
440/*
441 * linux/fs/nfs/dir.c
442 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800443extern const struct inode_operations nfs_dir_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000444#ifdef CONFIG_NFS_V3
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800445extern const struct inode_operations nfs3_dir_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000446#endif /* CONFIG_NFS_V3 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800447extern const struct file_operations nfs_dir_operations;
Al Virof786aa92009-02-20 05:51:22 +0000448extern const struct dentry_operations nfs_dentry_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
Trond Myklebustbfc69a42007-10-15 18:18:29 -0400450extern void nfs_force_lookup_revalidate(struct inode *dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
Trond Myklebustaf22f942007-08-10 17:45:10 -0400452extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags);
453extern void nfs_access_zap_cache(struct inode *inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
455/*
456 * linux/fs/nfs/symlink.c
457 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800458extern const struct inode_operations nfs_symlink_inode_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
460/*
Trond Myklebusta72b4422006-01-03 09:55:41 +0100461 * linux/fs/nfs/sysctl.c
462 */
463#ifdef CONFIG_SYSCTL
464extern int nfs_register_sysctl(void);
465extern void nfs_unregister_sysctl(void);
466#else
Stephen Rothwell7fd105e2006-02-20 18:28:08 -0800467#define nfs_register_sysctl() 0
Trond Myklebusta72b4422006-01-03 09:55:41 +0100468#define nfs_unregister_sysctl() do { } while(0)
469#endif
470
471/*
Trond Myklebust55a97592006-06-09 09:34:19 -0400472 * linux/fs/nfs/namespace.c
473 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800474extern const struct inode_operations nfs_mountpoint_inode_operations;
475extern const struct inode_operations nfs_referral_inode_operations;
Trond Myklebust51d8fa62006-06-09 09:34:20 -0400476extern int nfs_mountpoint_expiry_timeout;
477extern void nfs_release_automount_timer(void);
Trond Myklebust55a97592006-06-09 09:34:19 -0400478
479/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 * linux/fs/nfs/unlink.c
481 */
Trond Myklebuste4eff1a2007-07-14 15:39:58 -0400482extern int nfs_async_unlink(struct inode *dir, struct dentry *dentry);
483extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
Trond Myklebust565277f2007-10-15 18:17:53 -0400484extern void nfs_block_sillyrename(struct dentry *dentry);
485extern void nfs_unblock_sillyrename(struct dentry *dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
487/*
488 * linux/fs/nfs/write.c
489 */
Peter Zijlstra89a09142007-03-16 13:38:26 -0800490extern int nfs_congestion_kb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
492extern int nfs_writepages(struct address_space *, struct writeback_control *);
493extern int nfs_flush_incompatible(struct file *file, struct page *page);
494extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
Chuck Lever462d5b32006-03-20 13:44:32 -0500495extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496
497/*
498 * Try to write back everything synchronously (but check the
499 * return value!)
500 */
Trond Myklebust1c759502006-10-09 16:18:38 -0400501extern int nfs_wb_all(struct inode *inode);
502extern int nfs_wb_page(struct inode *inode, struct page* page);
Trond Myklebust1b3b4a12007-08-28 10:29:36 -0400503extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
Trond Myklebustb608b282010-07-30 15:31:54 -0400505extern int nfs_commit_inode(struct inode *, int);
Trond Myklebustc9d8f892008-04-15 16:56:39 -0400506extern struct nfs_write_data *nfs_commitdata_alloc(void);
Trond Myklebust8aca67f2006-11-13 16:23:44 -0500507extern void nfs_commit_free(struct nfs_write_data *wdata);
Trond Myklebust77a63f32010-08-01 13:40:40 -0400508#else
509static inline int
510nfs_commit_inode(struct inode *inode, int how)
511{
512 return 0;
513}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514#endif
515
516static inline int
517nfs_have_writebacks(struct inode *inode)
518{
519 return NFS_I(inode)->npages != 0;
520}
521
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522/*
Adrian Bunke4e20512006-08-03 15:07:47 -0400523 * Allocate nfs_write_data structures
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 */
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400525extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages);
Trond Myklebust1ae88b22009-08-12 09:12:30 -0400526extern void nfs_writedata_free(struct nfs_write_data *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528/*
529 * linux/fs/nfs/read.c
530 */
531extern int nfs_readpage(struct file *, struct page *);
532extern int nfs_readpages(struct file *, struct address_space *,
533 struct list_head *, unsigned);
Trond Myklebustec06c092006-03-20 13:44:27 -0500534extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *);
David Howellsf42b2932009-04-03 16:42:44 +0100535extern int nfs_readpage_async(struct nfs_open_context *, struct inode *,
536 struct page *);
Trond Myklebust963d8fe2006-01-03 09:55:04 +0100537
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538/*
Adrian Bunke4e20512006-08-03 15:07:47 -0400539 * Allocate nfs_read_data structures
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 */
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400541extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages);
Trond Myklebust1ae88b22009-08-12 09:12:30 -0400542extern void nfs_readdata_free(struct nfs_read_data *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544/*
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000545 * linux/fs/nfs3proc.c
546 */
547#ifdef CONFIG_NFS_V3_ACL
548extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
549extern int nfs3_proc_setacl(struct inode *inode, int type,
550 struct posix_acl *acl);
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000551extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
552 mode_t mode);
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000553extern void nfs3_forget_cached_acls(struct inode *inode);
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000554#else
555static inline int nfs3_proc_set_default_acl(struct inode *dir,
556 struct inode *inode,
557 mode_t mode)
558{
559 return 0;
560}
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000561
562static inline void nfs3_forget_cached_acls(struct inode *inode)
563{
564}
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000565#endif /* CONFIG_NFS_V3_ACL */
566
567/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 * inline functions
569 */
570
Chuck Lever433c9232007-07-01 12:12:14 -0400571static inline loff_t nfs_size_to_loff_t(__u64 size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572{
Chuck Lever433c9232007-07-01 12:12:14 -0400573 if (size > (__u64) OFFSET_MAX - 1)
574 return OFFSET_MAX - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 return (loff_t) size;
576}
577
578static inline ino_t
579nfs_fileid_to_ino_t(u64 fileid)
580{
581 ino_t ino = (ino_t) fileid;
582 if (sizeof(ino_t) < sizeof(u64))
583 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
584 return ino;
585}
586
587/* NFS root */
588
589extern void * nfs_root_data(void);
590
591#define nfs_wait_event(clnt, wq, condition) \
592({ \
Matthew Wilcox150030b2007-12-06 16:24:39 -0500593 int __retval = wait_event_killable(wq, condition); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 __retval; \
595})
596
597#define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
598
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599#endif /* __KERNEL__ */
600
601/*
602 * NFS debug flags
603 */
604#define NFSDBG_VFS 0x0001
605#define NFSDBG_DIRCACHE 0x0002
606#define NFSDBG_LOOKUPCACHE 0x0004
607#define NFSDBG_PAGECACHE 0x0008
608#define NFSDBG_PROC 0x0010
609#define NFSDBG_XDR 0x0020
610#define NFSDBG_FILE 0x0040
611#define NFSDBG_ROOT 0x0080
612#define NFSDBG_CALLBACK 0x0100
David Howells24c8dbb2006-08-22 20:06:10 -0400613#define NFSDBG_CLIENT 0x0200
Chuck Leverf1828992007-07-01 12:12:51 -0400614#define NFSDBG_MOUNT 0x0400
David Howellsc6a6f192009-04-03 16:42:42 +0100615#define NFSDBG_FSCACHE 0x0800
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616#define NFSDBG_ALL 0xFFFF
617
618#ifdef __KERNEL__
Benny Halevy4dc2eae2006-12-20 22:29:46 +0200619
620/*
621 * Enable debugging support for nfs client.
622 * Requires RPC_DEBUG.
623 */
624#ifdef RPC_DEBUG
625# define NFS_DEBUG
626#endif
627
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628# undef ifdebug
629# ifdef NFS_DEBUG
630# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac))
631# else
632# define ifdebug(fac) if (0)
633# endif
634#endif /* __KERNEL */
635
636#endif