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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * linux/include/linux/nfs_fs.h | |
4 | * | |
5 | * Copyright (C) 1992 Rick Sladkey | |
6 | * | |
7 | * OS-specific nfs filesystem definitions and declarations | |
8 | */ | |
1da177e4 LT |
9 | #ifndef _LINUX_NFS_FS_H |
10 | #define _LINUX_NFS_FS_H | |
11 | ||
607ca46e | 12 | #include <uapi/linux/nfs_fs.h> |
03bf4b70 | 13 | |
1da177e4 | 14 | |
e27d359e TM |
15 | /* |
16 | * Enable dprintk() debugging support for nfs client. | |
17 | */ | |
18 | #ifdef CONFIG_NFS_DEBUG | |
19 | # define NFS_DEBUG | |
20 | #endif | |
21 | ||
7f1cbe51 DW |
22 | #include <linux/in.h> |
23 | #include <linux/mm.h> | |
24 | #include <linux/pagemap.h> | |
1c3c07e9 | 25 | #include <linux/rbtree.h> |
7f1cbe51 DW |
26 | #include <linux/rwsem.h> |
27 | #include <linux/wait.h> | |
28 | ||
29 | #include <linux/sunrpc/debug.h> | |
30 | #include <linux/sunrpc/auth.h> | |
31 | #include <linux/sunrpc/clnt.h> | |
32 | ||
33 | #include <linux/nfs.h> | |
34 | #include <linux/nfs2.h> | |
35 | #include <linux/nfs3.h> | |
36 | #include <linux/nfs4.h> | |
37 | #include <linux/nfs_xdr.h> | |
7f1cbe51 DW |
38 | #include <linux/nfs_fs_sb.h> |
39 | ||
7f1cbe51 DW |
40 | #include <linux/mempool.h> |
41 | ||
42 | /* | |
43 | * These are the default flags for swap requests | |
44 | */ | |
45 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) | |
46 | ||
1da177e4 LT |
47 | /* |
48 | * NFSv3/v4 Access mode cache entry | |
49 | */ | |
50 | struct nfs_access_entry { | |
1c3c07e9 | 51 | struct rb_node rb_node; |
cfcea3e8 | 52 | struct list_head lru; |
1da177e4 | 53 | struct rpc_cred * cred; |
bd8b2441 | 54 | __u32 mask; |
f682a398 | 55 | struct rcu_head rcu_head; |
1da177e4 LT |
56 | }; |
57 | ||
f11ac8db TM |
58 | struct nfs_lock_context { |
59 | atomic_t count; | |
60 | struct list_head list; | |
61 | struct nfs_open_context *open_context; | |
d51fdb87 | 62 | fl_owner_t lockowner; |
210c7c17 | 63 | atomic_t io_count; |
f11ac8db TM |
64 | }; |
65 | ||
1da177e4 LT |
66 | struct nfs4_state; |
67 | struct nfs_open_context { | |
f11ac8db | 68 | struct nfs_lock_context lock_context; |
532d4def | 69 | fl_owner_t flock_owner; |
3d4ff43d | 70 | struct dentry *dentry; |
1da177e4 LT |
71 | struct rpc_cred *cred; |
72 | struct nfs4_state *state; | |
dc0b027d | 73 | fmode_t mode; |
7b159fc1 TM |
74 | |
75 | unsigned long flags; | |
76 | #define NFS_CONTEXT_ERROR_WRITE (0) | |
05990d1b | 77 | #define NFS_CONTEXT_RESEND_WRITES (1) |
c58c8441 | 78 | #define NFS_CONTEXT_BAD (2) |
7d6ddf88 | 79 | #define NFS_CONTEXT_UNLOCK (3) |
1da177e4 LT |
80 | int error; |
81 | ||
82 | struct list_head list; | |
82be417a | 83 | struct nfs4_threshold *mdsthreshold; |
480c2006 | 84 | }; |
00a92642 | 85 | |
480c2006 | 86 | struct nfs_open_dir_context { |
311324ad | 87 | struct list_head list; |
480c2006 | 88 | struct rpc_cred *cred; |
0c030806 | 89 | unsigned long attr_gencount; |
00a92642 | 90 | __u64 dir_cookie; |
8ef2ce3e | 91 | __u64 dup_cookie; |
0c030806 | 92 | signed char duped; |
1da177e4 LT |
93 | }; |
94 | ||
95 | /* | |
96 | * NFSv4 delegation | |
97 | */ | |
98 | struct nfs_delegation; | |
99 | ||
5c6a9f7d AG |
100 | struct posix_acl; |
101 | ||
1da177e4 LT |
102 | /* |
103 | * nfs fs inode data in memory | |
104 | */ | |
105 | struct nfs_inode { | |
106 | /* | |
107 | * The 64bit 'inode number' | |
108 | */ | |
109 | __u64 fileid; | |
110 | ||
111 | /* | |
112 | * NFS file handle | |
113 | */ | |
114 | struct nfs_fh fh; | |
115 | ||
116 | /* | |
117 | * Various flags | |
118 | */ | |
412d582e CL |
119 | unsigned long flags; /* atomic bit ops */ |
120 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
121 | |
122 | /* | |
24bd68f4 | 123 | * read_cache_jiffies is when we started read-caching this inode. |
1da177e4 LT |
124 | * attrtimeo is for how long the cached information is assumed |
125 | * to be valid. A successful attribute revalidation doubles | |
126 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
127 | * acregmin/acdirmin. | |
128 | * | |
129 | * We need to revalidate the cached attrs for this inode if | |
130 | * | |
64672d55 PS |
131 | * jiffies - read_cache_jiffies >= attrtimeo |
132 | * | |
133 | * Please note the comparison is greater than or equal | |
134 | * so that zero timeout values can be specified. | |
1da177e4 | 135 | */ |
1da177e4 LT |
136 | unsigned long read_cache_jiffies; |
137 | unsigned long attrtimeo; | |
138 | unsigned long attrtimeo_timestamp; | |
1da177e4 | 139 | |
4704f0e2 | 140 | unsigned long attr_gencount; |
1da177e4 LT |
141 | /* "Generation counter" for the attribute cache. This is |
142 | * bumped whenever we update the metadata on the | |
143 | * server. | |
144 | */ | |
145 | unsigned long cache_change_attribute; | |
1da177e4 | 146 | |
1c3c07e9 | 147 | struct rb_root access_cache; |
cfcea3e8 TM |
148 | struct list_head access_cache_entry_lru; |
149 | struct list_head access_cache_inode_lru; | |
1da177e4 LT |
150 | |
151 | /* | |
152 | * This is the cookie verifier used for NFSv3 readdir | |
153 | * operations | |
154 | */ | |
bc4785cd | 155 | __be32 cookieverf[2]; |
1da177e4 | 156 | |
a6b6d5b8 | 157 | atomic_long_t nrequests; |
ea2cf228 | 158 | struct nfs_mds_commit_info commit_info; |
1da177e4 LT |
159 | |
160 | /* Open contexts for shared mmap writes */ | |
161 | struct list_head open_files; | |
162 | ||
884be175 AV |
163 | /* Readers: in-flight sillydelete RPC calls */ |
164 | /* Writers: rmdir */ | |
165 | struct rw_semaphore rmdir_sem; | |
e824f99a | 166 | struct mutex commit_mutex; |
565277f6 | 167 | |
89d77c8f | 168 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e | 169 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
170 | /* NFSv4 state */ |
171 | struct list_head open_states; | |
5b22216e | 172 | struct nfs_delegation __rcu *delegation; |
1da177e4 | 173 | struct rw_semaphore rwsem; |
e5e94017 BH |
174 | |
175 | /* pNFS layout information */ | |
176 | struct pnfs_layout_hdr *layout; | |
1da177e4 | 177 | #endif /* CONFIG_NFS_V4*/ |
2701d086 AA |
178 | /* how many bytes have been written/read and how many bytes queued up */ |
179 | __u64 write_io; | |
180 | __u64 read_io; | |
ef79c097 DH |
181 | #ifdef CONFIG_NFS_FSCACHE |
182 | struct fscache_cookie *fscache; | |
183 | #endif | |
1da177e4 LT |
184 | struct inode vfs_inode; |
185 | }; | |
186 | ||
187 | /* | |
55296809 | 188 | * Cache validity bit flags |
1da177e4 | 189 | */ |
55296809 CL |
190 | #define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */ |
191 | #define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ | |
192 | #define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ | |
193 | #define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ | |
194 | #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ | |
195 | #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ | |
412c77ce | 196 | #define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */ |
aa9c2669 | 197 | #define NFS_INO_INVALID_LABEL 0x0080 /* cached label is invalid */ |
55296809 CL |
198 | |
199 | /* | |
412d582e | 200 | * Bit offsets in flags field |
55296809 | 201 | */ |
691beb13 TM |
202 | #define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */ |
203 | #define NFS_INO_STALE (1) /* possible stale inode */ | |
204 | #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ | |
d529ef83 | 205 | #define NFS_INO_INVALIDATING (3) /* inode is being invalidated */ |
ef79c097 DH |
206 | #define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ |
207 | #define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */ | |
863a3c6c | 208 | #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ |
92407e75 | 209 | #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ |
1bfe3b25 | 210 | #define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */ |
a5864c99 | 211 | #define NFS_INO_ODIRECT (12) /* I/O setting is O_DIRECT */ |
1da177e4 | 212 | |
99fadcd7 | 213 | static inline struct nfs_inode *NFS_I(const struct inode *inode) |
1da177e4 LT |
214 | { |
215 | return container_of(inode, struct nfs_inode, vfs_inode); | |
216 | } | |
99fadcd7 BH |
217 | |
218 | static inline struct nfs_server *NFS_SB(const struct super_block *s) | |
219 | { | |
220 | return (struct nfs_server *)(s->s_fs_info); | |
221 | } | |
222 | ||
223 | static inline struct nfs_fh *NFS_FH(const struct inode *inode) | |
224 | { | |
225 | return &NFS_I(inode)->fh; | |
226 | } | |
227 | ||
228 | static inline struct nfs_server *NFS_SERVER(const struct inode *inode) | |
229 | { | |
230 | return NFS_SB(inode->i_sb); | |
231 | } | |
232 | ||
233 | static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) | |
234 | { | |
235 | return NFS_SERVER(inode)->client; | |
236 | } | |
237 | ||
238 | static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) | |
239 | { | |
240 | return NFS_SERVER(inode)->nfs_client->rpc_ops; | |
241 | } | |
242 | ||
99fadcd7 BH |
243 | static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) |
244 | { | |
245 | struct nfs_server *nfss = NFS_SERVER(inode); | |
246 | return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; | |
247 | } | |
248 | ||
249 | static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) | |
250 | { | |
251 | struct nfs_server *nfss = NFS_SERVER(inode); | |
252 | return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; | |
253 | } | |
254 | ||
255 | static inline int NFS_STALE(const struct inode *inode) | |
256 | { | |
257 | return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); | |
258 | } | |
259 | ||
f1fe29b4 | 260 | static inline struct fscache_cookie *nfs_i_fscache(struct inode *inode) |
ef79c097 | 261 | { |
f1fe29b4 DH |
262 | #ifdef CONFIG_NFS_FSCACHE |
263 | return NFS_I(inode)->fscache; | |
264 | #else | |
265 | return NULL; | |
266 | #endif | |
ef79c097 DH |
267 | } |
268 | ||
99fadcd7 BH |
269 | static inline __u64 NFS_FILEID(const struct inode *inode) |
270 | { | |
271 | return NFS_I(inode)->fileid; | |
272 | } | |
273 | ||
274 | static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) | |
275 | { | |
276 | NFS_I(inode)->fileid = fileid; | |
277 | } | |
1da177e4 | 278 | |
decf491f TM |
279 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
280 | { | |
38478b24 TM |
281 | struct nfs_inode *nfsi = NFS_I(inode); |
282 | ||
decf491f | 283 | spin_lock(&inode->i_lock); |
115c48d7 TM |
284 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
285 | NFS_INO_REVAL_PAGECACHE | | |
286 | NFS_INO_INVALID_ACCESS | | |
287 | NFS_INO_INVALID_ACL; | |
f3821110 | 288 | if (S_ISDIR(inode->i_mode)) |
115c48d7 | 289 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
decf491f TM |
290 | spin_unlock(&inode->i_lock); |
291 | } | |
292 | ||
1da177e4 LT |
293 | static inline int nfs_server_capable(struct inode *inode, int cap) |
294 | { | |
295 | return NFS_SERVER(inode)->caps & cap; | |
296 | } | |
297 | ||
d75340cc TM |
298 | static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) |
299 | { | |
300 | dentry->d_time = verf; | |
301 | } | |
302 | ||
1da177e4 LT |
303 | /** |
304 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
8edb0182 | 305 | * @dir - pointer to parent directory inode |
1da177e4 LT |
306 | * The "change attribute" is updated every time we finish an operation |
307 | * that will result in a metadata change on the server. | |
308 | */ | |
8edb0182 | 309 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
1da177e4 | 310 | { |
8edb0182 | 311 | return NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
312 | } |
313 | ||
314 | /** | |
4b841736 TM |
315 | * nfs_verify_change_attribute - Detects NFS remote directory changes |
316 | * @dir - pointer to parent directory inode | |
1da177e4 | 317 | * @chattr - previously saved change attribute |
4b841736 TM |
318 | * Return "false" if the verifiers doesn't match the change attribute. |
319 | * This would usually indicate that the directory contents have changed on | |
320 | * the server, and that any dentries need revalidating. | |
1da177e4 | 321 | */ |
4b841736 | 322 | static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr) |
1da177e4 | 323 | { |
4b841736 | 324 | return chattr == NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
325 | } |
326 | ||
327 | /* | |
328 | * linux/fs/nfs/inode.c | |
329 | */ | |
29884df0 | 330 | extern int nfs_sync_mapping(struct address_space *mapping); |
cd9ae2b6 | 331 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 332 | extern void nfs_zap_caches(struct inode *); |
c4812998 | 333 | extern void nfs_invalidate_atime(struct inode *); |
1da177e4 | 334 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
1775fd3e | 335 | struct nfs_fattr *, struct nfs4_label *); |
f174ff7a | 336 | struct inode *nfs_ilookup(struct super_block *sb, struct nfs_fattr *, struct nfs_fh *); |
1da177e4 | 337 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); |
decf491f | 338 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
70ca8852 | 339 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
a08a8cd3 | 340 | extern int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr); |
a528d35e | 341 | extern int nfs_getattr(const struct path *, struct kstat *, u32, unsigned int); |
6168f62c WAA |
342 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); |
343 | extern void nfs_access_set_mask(struct nfs_access_entry *, u32); | |
10556cb2 | 344 | extern int nfs_permission(struct inode *, int); |
1da177e4 | 345 | extern int nfs_open(struct inode *, struct file *); |
43f291cd | 346 | extern int nfs_attribute_cache_expired(struct inode *inode); |
1da177e4 LT |
347 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); |
348 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
1cd9cb05 | 349 | extern bool nfs_mapping_need_revalidate_inode(struct inode *inode); |
44b11874 | 350 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
0d0def49 | 351 | extern int nfs_revalidate_mapping_rcu(struct inode *inode); |
1da177e4 | 352 | extern int nfs_setattr(struct dentry *, struct iattr *); |
f044636d | 353 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, struct nfs_fattr *); |
aa9c2669 DQ |
354 | extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
355 | struct nfs4_label *label); | |
1da177e4 LT |
356 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
357 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
dc0b027d | 358 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode); |
532d4def | 359 | extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode, struct file *filp); |
c45ffdd2 | 360 | extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx); |
cd9a1c0e | 361 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); |
aff8d8dc | 362 | extern void nfs_file_clear_open_context(struct file *flip); |
f11ac8db TM |
363 | extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); |
364 | extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); | |
f43bf0be | 365 | extern u64 nfs_compat_user_ino64(u64 fileid); |
4704f0e2 | 366 | extern void nfs_fattr_init(struct nfs_fattr *fattr); |
140e049c | 367 | extern void nfs_fattr_set_barrier(struct nfs_fattr *fattr); |
56463e50 | 368 | extern unsigned long nfs_inc_attr_generation_counter(void); |
1da177e4 | 369 | |
2d36bfde TM |
370 | extern struct nfs_fattr *nfs_alloc_fattr(void); |
371 | ||
372 | static inline void nfs_free_fattr(const struct nfs_fattr *fattr) | |
373 | { | |
374 | kfree(fattr); | |
375 | } | |
376 | ||
377 | extern struct nfs_fh *nfs_alloc_fhandle(void); | |
378 | ||
379 | static inline void nfs_free_fhandle(const struct nfs_fh *fh) | |
380 | { | |
381 | kfree(fh); | |
382 | } | |
383 | ||
e27d359e | 384 | #ifdef NFS_DEBUG |
d8e0539e WAA |
385 | extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh); |
386 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
387 | { | |
388 | return _nfs_display_fhandle_hash(fh); | |
389 | } | |
20d27e92 CL |
390 | extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption); |
391 | #define nfs_display_fhandle(fh, caption) \ | |
392 | do { \ | |
393 | if (unlikely(nfs_debug & NFSDBG_FACILITY)) \ | |
394 | _nfs_display_fhandle(fh, caption); \ | |
395 | } while (0) | |
396 | #else | |
d8e0539e WAA |
397 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) |
398 | { | |
9304a812 | 399 | return 0; |
d8e0539e | 400 | } |
20d27e92 CL |
401 | static inline void nfs_display_fhandle(const struct nfs_fh *fh, |
402 | const char *caption) | |
403 | { | |
404 | } | |
405 | #endif | |
406 | ||
56463e50 CL |
407 | /* |
408 | * linux/fs/nfs/nfsroot.c | |
409 | */ | |
410 | extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ | |
1da177e4 | 411 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ |
5a874db4 | 412 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
0e574af1 | 413 | |
1da177e4 LT |
414 | /* |
415 | * linux/fs/nfs/file.c | |
416 | */ | |
4b6f5d20 | 417 | extern const struct file_operations nfs_file_operations; |
89d77c8f | 418 | #if IS_ENABLED(CONFIG_NFS_V4) |
1788ea6e JL |
419 | extern const struct file_operations nfs4_file_operations; |
420 | #endif /* CONFIG_NFS_V4 */ | |
f5e54d6e | 421 | extern const struct address_space_operations nfs_file_aops; |
11de3b11 | 422 | extern const struct address_space_operations nfs_dir_aops; |
1da177e4 | 423 | |
c03025d5 TM |
424 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
425 | { | |
426 | return filp->private_data; | |
427 | } | |
428 | ||
1da177e4 LT |
429 | static inline struct rpc_cred *nfs_file_cred(struct file *file) |
430 | { | |
504e5189 NB |
431 | if (file != NULL) { |
432 | struct nfs_open_context *ctx = | |
433 | nfs_file_open_context(file); | |
434 | if (ctx) | |
435 | return ctx->cred; | |
436 | } | |
1da177e4 LT |
437 | return NULL; |
438 | } | |
439 | ||
440 | /* | |
441 | * linux/fs/nfs/direct.c | |
442 | */ | |
c8b8e32d | 443 | extern ssize_t nfs_direct_IO(struct kiocb *, struct iov_iter *); |
027445c3 | 444 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, |
c8b8e32d | 445 | struct iov_iter *iter); |
027445c3 | 446 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, |
65a4a1ca | 447 | struct iov_iter *iter); |
1da177e4 LT |
448 | |
449 | /* | |
450 | * linux/fs/nfs/dir.c | |
451 | */ | |
4b6f5d20 | 452 | extern const struct file_operations nfs_dir_operations; |
f786aa90 | 453 | extern const struct dentry_operations nfs_dentry_operations; |
1da177e4 | 454 | |
bfc69a45 | 455 | extern void nfs_force_lookup_revalidate(struct inode *dir); |
1775fd3e DQ |
456 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, |
457 | struct nfs_fattr *fattr, struct nfs4_label *label); | |
af22f94a TM |
458 | extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags); |
459 | extern void nfs_access_zap_cache(struct inode *inode); | |
1da177e4 LT |
460 | |
461 | /* | |
462 | * linux/fs/nfs/symlink.c | |
463 | */ | |
c5ef1c42 | 464 | extern const struct inode_operations nfs_symlink_inode_operations; |
1da177e4 | 465 | |
a72b4422 TM |
466 | /* |
467 | * linux/fs/nfs/sysctl.c | |
468 | */ | |
469 | #ifdef CONFIG_SYSCTL | |
470 | extern int nfs_register_sysctl(void); | |
471 | extern void nfs_unregister_sysctl(void); | |
472 | #else | |
7fd105e7 | 473 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
474 | #define nfs_unregister_sysctl() do { } while(0) |
475 | #endif | |
476 | ||
55a97593 TM |
477 | /* |
478 | * linux/fs/nfs/namespace.c | |
479 | */ | |
c5ef1c42 AV |
480 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
481 | extern const struct inode_operations nfs_referral_inode_operations; | |
51d8fa6a TM |
482 | extern int nfs_mountpoint_expiry_timeout; |
483 | extern void nfs_release_automount_timer(void); | |
55a97593 | 484 | |
1da177e4 LT |
485 | /* |
486 | * linux/fs/nfs/unlink.c | |
487 | */ | |
e4eff1a6 | 488 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); |
1da177e4 LT |
489 | |
490 | /* | |
491 | * linux/fs/nfs/write.c | |
492 | */ | |
89a09141 | 493 | extern int nfs_congestion_kb; |
1da177e4 LT |
494 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
495 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
496 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
497 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
1da177e4 LT |
498 | |
499 | /* | |
500 | * Try to write back everything synchronously (but check the | |
501 | * return value!) | |
502 | */ | |
9e1681c2 | 503 | extern int nfs_sync_inode(struct inode *inode); |
1c75950b | 504 | extern int nfs_wb_all(struct inode *inode); |
c373fff7 | 505 | extern int nfs_wb_page(struct inode *inode, struct page *page); |
1b3b4a1a | 506 | extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); |
b608b283 | 507 | extern int nfs_commit_inode(struct inode *, int); |
518662e0 | 508 | extern struct nfs_commit_data *nfs_commitdata_alloc(bool never_fail); |
0b7c0153 | 509 | extern void nfs_commit_free(struct nfs_commit_data *data); |
1da177e4 LT |
510 | |
511 | static inline int | |
512 | nfs_have_writebacks(struct inode *inode) | |
513 | { | |
a6b6d5b8 | 514 | return atomic_long_read(&NFS_I(inode)->nrequests) != 0; |
1da177e4 LT |
515 | } |
516 | ||
1da177e4 LT |
517 | /* |
518 | * linux/fs/nfs/read.c | |
519 | */ | |
520 | extern int nfs_readpage(struct file *, struct page *); | |
521 | extern int nfs_readpages(struct file *, struct address_space *, | |
522 | struct list_head *, unsigned); | |
f42b293d DH |
523 | extern int nfs_readpage_async(struct nfs_open_context *, struct inode *, |
524 | struct page *); | |
963d8fe5 | 525 | |
1da177e4 LT |
526 | /* |
527 | * inline functions | |
528 | */ | |
529 | ||
433c9237 | 530 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
1da177e4 | 531 | { |
50ab8ec7 | 532 | return min_t(u64, size, OFFSET_MAX); |
1da177e4 LT |
533 | } |
534 | ||
535 | static inline ino_t | |
536 | nfs_fileid_to_ino_t(u64 fileid) | |
537 | { | |
538 | ino_t ino = (ino_t) fileid; | |
539 | if (sizeof(ino_t) < sizeof(u64)) | |
540 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
541 | return ino; | |
542 | } | |
543 | ||
1da177e4 LT |
544 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) |
545 | ||
4dc2eaec | 546 | |
1da177e4 LT |
547 | # undef ifdebug |
548 | # ifdef NFS_DEBUG | |
549 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
6f00866d | 550 | # define NFS_IFDEBUG(x) x |
1da177e4 LT |
551 | # else |
552 | # define ifdebug(fac) if (0) | |
6f00866d | 553 | # define NFS_IFDEBUG(x) |
1da177e4 | 554 | # endif |
1da177e4 | 555 | #endif |