Commit | Line | Data |
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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> |
2f62b5aa | 26 | #include <linux/refcount.h> |
7f1cbe51 DW |
27 | #include <linux/rwsem.h> |
28 | #include <linux/wait.h> | |
29 | ||
30 | #include <linux/sunrpc/debug.h> | |
31 | #include <linux/sunrpc/auth.h> | |
32 | #include <linux/sunrpc/clnt.h> | |
33 | ||
34 | #include <linux/nfs.h> | |
35 | #include <linux/nfs2.h> | |
36 | #include <linux/nfs3.h> | |
37 | #include <linux/nfs4.h> | |
38 | #include <linux/nfs_xdr.h> | |
7f1cbe51 DW |
39 | #include <linux/nfs_fs_sb.h> |
40 | ||
7f1cbe51 DW |
41 | #include <linux/mempool.h> |
42 | ||
43 | /* | |
44 | * These are the default flags for swap requests | |
45 | */ | |
46 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) | |
47 | ||
1da177e4 LT |
48 | /* |
49 | * NFSv3/v4 Access mode cache entry | |
50 | */ | |
51 | struct nfs_access_entry { | |
1c3c07e9 | 52 | struct rb_node rb_node; |
cfcea3e8 | 53 | struct list_head lru; |
1da177e4 | 54 | struct rpc_cred * cred; |
bd8b2441 | 55 | __u32 mask; |
f682a398 | 56 | struct rcu_head rcu_head; |
1da177e4 LT |
57 | }; |
58 | ||
f11ac8db | 59 | struct nfs_lock_context { |
2f62b5aa | 60 | refcount_t count; |
f11ac8db TM |
61 | struct list_head list; |
62 | struct nfs_open_context *open_context; | |
d51fdb87 | 63 | fl_owner_t lockowner; |
210c7c17 | 64 | atomic_t io_count; |
f11ac8db TM |
65 | }; |
66 | ||
1da177e4 LT |
67 | struct nfs4_state; |
68 | struct nfs_open_context { | |
f11ac8db | 69 | struct nfs_lock_context lock_context; |
532d4def | 70 | fl_owner_t flock_owner; |
3d4ff43d | 71 | struct dentry *dentry; |
1da177e4 LT |
72 | struct rpc_cred *cred; |
73 | struct nfs4_state *state; | |
dc0b027d | 74 | fmode_t mode; |
7b159fc1 TM |
75 | |
76 | unsigned long flags; | |
77 | #define NFS_CONTEXT_ERROR_WRITE (0) | |
05990d1b | 78 | #define NFS_CONTEXT_RESEND_WRITES (1) |
c58c8441 | 79 | #define NFS_CONTEXT_BAD (2) |
7d6ddf88 | 80 | #define NFS_CONTEXT_UNLOCK (3) |
1da177e4 LT |
81 | int error; |
82 | ||
83 | struct list_head list; | |
82be417a | 84 | struct nfs4_threshold *mdsthreshold; |
480c2006 | 85 | }; |
00a92642 | 86 | |
480c2006 | 87 | struct nfs_open_dir_context { |
311324ad | 88 | struct list_head list; |
480c2006 | 89 | struct rpc_cred *cred; |
0c030806 | 90 | unsigned long attr_gencount; |
00a92642 | 91 | __u64 dir_cookie; |
8ef2ce3e | 92 | __u64 dup_cookie; |
0c030806 | 93 | signed char duped; |
1da177e4 LT |
94 | }; |
95 | ||
96 | /* | |
97 | * NFSv4 delegation | |
98 | */ | |
99 | struct nfs_delegation; | |
100 | ||
5c6a9f7d AG |
101 | struct posix_acl; |
102 | ||
1da177e4 LT |
103 | /* |
104 | * nfs fs inode data in memory | |
105 | */ | |
106 | struct nfs_inode { | |
107 | /* | |
108 | * The 64bit 'inode number' | |
109 | */ | |
110 | __u64 fileid; | |
111 | ||
112 | /* | |
113 | * NFS file handle | |
114 | */ | |
115 | struct nfs_fh fh; | |
116 | ||
117 | /* | |
118 | * Various flags | |
119 | */ | |
412d582e CL |
120 | unsigned long flags; /* atomic bit ops */ |
121 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
122 | |
123 | /* | |
24bd68f4 | 124 | * read_cache_jiffies is when we started read-caching this inode. |
1da177e4 LT |
125 | * attrtimeo is for how long the cached information is assumed |
126 | * to be valid. A successful attribute revalidation doubles | |
127 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
128 | * acregmin/acdirmin. | |
129 | * | |
130 | * We need to revalidate the cached attrs for this inode if | |
131 | * | |
64672d55 PS |
132 | * jiffies - read_cache_jiffies >= attrtimeo |
133 | * | |
134 | * Please note the comparison is greater than or equal | |
135 | * so that zero timeout values can be specified. | |
1da177e4 | 136 | */ |
1da177e4 LT |
137 | unsigned long read_cache_jiffies; |
138 | unsigned long attrtimeo; | |
139 | unsigned long attrtimeo_timestamp; | |
1da177e4 | 140 | |
4704f0e2 | 141 | unsigned long attr_gencount; |
1da177e4 LT |
142 | /* "Generation counter" for the attribute cache. This is |
143 | * bumped whenever we update the metadata on the | |
144 | * server. | |
145 | */ | |
146 | unsigned long cache_change_attribute; | |
1da177e4 | 147 | |
1c3c07e9 | 148 | struct rb_root access_cache; |
cfcea3e8 TM |
149 | struct list_head access_cache_entry_lru; |
150 | struct list_head access_cache_inode_lru; | |
1da177e4 LT |
151 | |
152 | /* | |
153 | * This is the cookie verifier used for NFSv3 readdir | |
154 | * operations | |
155 | */ | |
bc4785cd | 156 | __be32 cookieverf[2]; |
1da177e4 | 157 | |
a6b6d5b8 | 158 | atomic_long_t nrequests; |
ea2cf228 | 159 | struct nfs_mds_commit_info commit_info; |
1da177e4 LT |
160 | |
161 | /* Open contexts for shared mmap writes */ | |
162 | struct list_head open_files; | |
163 | ||
884be175 AV |
164 | /* Readers: in-flight sillydelete RPC calls */ |
165 | /* Writers: rmdir */ | |
166 | struct rw_semaphore rmdir_sem; | |
e824f99a | 167 | struct mutex commit_mutex; |
565277f6 | 168 | |
89d77c8f | 169 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e | 170 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
171 | /* NFSv4 state */ |
172 | struct list_head open_states; | |
5b22216e | 173 | struct nfs_delegation __rcu *delegation; |
1da177e4 | 174 | struct rw_semaphore rwsem; |
e5e94017 BH |
175 | |
176 | /* pNFS layout information */ | |
177 | struct pnfs_layout_hdr *layout; | |
1da177e4 | 178 | #endif /* CONFIG_NFS_V4*/ |
2701d086 AA |
179 | /* how many bytes have been written/read and how many bytes queued up */ |
180 | __u64 write_io; | |
181 | __u64 read_io; | |
ef79c097 DH |
182 | #ifdef CONFIG_NFS_FSCACHE |
183 | struct fscache_cookie *fscache; | |
184 | #endif | |
1da177e4 LT |
185 | struct inode vfs_inode; |
186 | }; | |
187 | ||
3c181827 AS |
188 | /* |
189 | * Access bit flags | |
190 | */ | |
191 | #define NFS_ACCESS_READ 0x0001 | |
192 | #define NFS_ACCESS_LOOKUP 0x0002 | |
193 | #define NFS_ACCESS_MODIFY 0x0004 | |
194 | #define NFS_ACCESS_EXTEND 0x0008 | |
195 | #define NFS_ACCESS_DELETE 0x0010 | |
196 | #define NFS_ACCESS_EXECUTE 0x0020 | |
197 | ||
1da177e4 | 198 | /* |
55296809 | 199 | * Cache validity bit flags |
1da177e4 | 200 | */ |
90972882 TM |
201 | #define NFS_INO_INVALID_DATA BIT(1) /* cached data is invalid */ |
202 | #define NFS_INO_INVALID_ATIME BIT(2) /* cached atime is invalid */ | |
203 | #define NFS_INO_INVALID_ACCESS BIT(3) /* cached access cred invalid */ | |
204 | #define NFS_INO_INVALID_ACL BIT(4) /* cached acls are invalid */ | |
205 | #define NFS_INO_REVAL_PAGECACHE BIT(5) /* must revalidate pagecache */ | |
206 | #define NFS_INO_REVAL_FORCED BIT(6) /* force revalidation ignoring a delegation */ | |
207 | #define NFS_INO_INVALID_LABEL BIT(7) /* cached label is invalid */ | |
16e14375 TM |
208 | #define NFS_INO_INVALID_CHANGE BIT(8) /* cached change is invalid */ |
209 | #define NFS_INO_INVALID_CTIME BIT(9) /* cached ctime is invalid */ | |
210 | #define NFS_INO_INVALID_MTIME BIT(10) /* cached mtime is invalid */ | |
211 | #define NFS_INO_INVALID_SIZE BIT(11) /* cached size is invalid */ | |
212 | #define NFS_INO_INVALID_OTHER BIT(12) /* other attrs are invalid */ | |
213 | ||
214 | #define NFS_INO_INVALID_ATTR (NFS_INO_INVALID_CHANGE \ | |
215 | | NFS_INO_INVALID_CTIME \ | |
216 | | NFS_INO_INVALID_MTIME \ | |
217 | | NFS_INO_INVALID_SIZE \ | |
218 | | NFS_INO_INVALID_OTHER) /* inode metadata is invalid */ | |
55296809 CL |
219 | |
220 | /* | |
412d582e | 221 | * Bit offsets in flags field |
55296809 | 222 | */ |
691beb13 TM |
223 | #define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */ |
224 | #define NFS_INO_STALE (1) /* possible stale inode */ | |
225 | #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ | |
d529ef83 | 226 | #define NFS_INO_INVALIDATING (3) /* inode is being invalidated */ |
ef79c097 DH |
227 | #define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ |
228 | #define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */ | |
863a3c6c | 229 | #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ |
92407e75 | 230 | #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ |
1bfe3b25 | 231 | #define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */ |
a5864c99 | 232 | #define NFS_INO_ODIRECT (12) /* I/O setting is O_DIRECT */ |
1da177e4 | 233 | |
99fadcd7 | 234 | static inline struct nfs_inode *NFS_I(const struct inode *inode) |
1da177e4 LT |
235 | { |
236 | return container_of(inode, struct nfs_inode, vfs_inode); | |
237 | } | |
99fadcd7 BH |
238 | |
239 | static inline struct nfs_server *NFS_SB(const struct super_block *s) | |
240 | { | |
241 | return (struct nfs_server *)(s->s_fs_info); | |
242 | } | |
243 | ||
244 | static inline struct nfs_fh *NFS_FH(const struct inode *inode) | |
245 | { | |
246 | return &NFS_I(inode)->fh; | |
247 | } | |
248 | ||
249 | static inline struct nfs_server *NFS_SERVER(const struct inode *inode) | |
250 | { | |
251 | return NFS_SB(inode->i_sb); | |
252 | } | |
253 | ||
254 | static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) | |
255 | { | |
256 | return NFS_SERVER(inode)->client; | |
257 | } | |
258 | ||
259 | static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) | |
260 | { | |
261 | return NFS_SERVER(inode)->nfs_client->rpc_ops; | |
262 | } | |
263 | ||
99fadcd7 BH |
264 | static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) |
265 | { | |
266 | struct nfs_server *nfss = NFS_SERVER(inode); | |
267 | return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; | |
268 | } | |
269 | ||
270 | static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) | |
271 | { | |
272 | struct nfs_server *nfss = NFS_SERVER(inode); | |
273 | return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; | |
274 | } | |
275 | ||
276 | static inline int NFS_STALE(const struct inode *inode) | |
277 | { | |
278 | return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); | |
279 | } | |
280 | ||
f1fe29b4 | 281 | static inline struct fscache_cookie *nfs_i_fscache(struct inode *inode) |
ef79c097 | 282 | { |
f1fe29b4 DH |
283 | #ifdef CONFIG_NFS_FSCACHE |
284 | return NFS_I(inode)->fscache; | |
285 | #else | |
286 | return NULL; | |
287 | #endif | |
ef79c097 DH |
288 | } |
289 | ||
99fadcd7 BH |
290 | static inline __u64 NFS_FILEID(const struct inode *inode) |
291 | { | |
292 | return NFS_I(inode)->fileid; | |
293 | } | |
294 | ||
295 | static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) | |
296 | { | |
297 | NFS_I(inode)->fileid = fileid; | |
298 | } | |
1da177e4 | 299 | |
decf491f TM |
300 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
301 | { | |
38478b24 TM |
302 | struct nfs_inode *nfsi = NFS_I(inode); |
303 | ||
decf491f | 304 | spin_lock(&inode->i_lock); |
16e14375 TM |
305 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE |
306 | | NFS_INO_INVALID_ACCESS | |
307 | | NFS_INO_INVALID_ACL | |
308 | | NFS_INO_INVALID_CHANGE | |
309 | | NFS_INO_INVALID_CTIME; | |
f3821110 | 310 | if (S_ISDIR(inode->i_mode)) |
115c48d7 | 311 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
decf491f TM |
312 | spin_unlock(&inode->i_lock); |
313 | } | |
314 | ||
1da177e4 LT |
315 | static inline int nfs_server_capable(struct inode *inode, int cap) |
316 | { | |
317 | return NFS_SERVER(inode)->caps & cap; | |
318 | } | |
319 | ||
d75340cc TM |
320 | static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) |
321 | { | |
322 | dentry->d_time = verf; | |
323 | } | |
324 | ||
1da177e4 LT |
325 | /** |
326 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
8edb0182 | 327 | * @dir - pointer to parent directory inode |
1da177e4 LT |
328 | * The "change attribute" is updated every time we finish an operation |
329 | * that will result in a metadata change on the server. | |
330 | */ | |
8edb0182 | 331 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
1da177e4 | 332 | { |
8edb0182 | 333 | return NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
334 | } |
335 | ||
336 | /** | |
4b841736 TM |
337 | * nfs_verify_change_attribute - Detects NFS remote directory changes |
338 | * @dir - pointer to parent directory inode | |
1da177e4 | 339 | * @chattr - previously saved change attribute |
4b841736 TM |
340 | * Return "false" if the verifiers doesn't match the change attribute. |
341 | * This would usually indicate that the directory contents have changed on | |
342 | * the server, and that any dentries need revalidating. | |
1da177e4 | 343 | */ |
4b841736 | 344 | static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr) |
1da177e4 | 345 | { |
4b841736 | 346 | return chattr == NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
347 | } |
348 | ||
349 | /* | |
350 | * linux/fs/nfs/inode.c | |
351 | */ | |
29884df0 | 352 | extern int nfs_sync_mapping(struct address_space *mapping); |
cd9ae2b6 | 353 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 354 | extern void nfs_zap_caches(struct inode *); |
c4812998 | 355 | extern void nfs_invalidate_atime(struct inode *); |
1da177e4 | 356 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
1775fd3e | 357 | struct nfs_fattr *, struct nfs4_label *); |
f174ff7a | 358 | struct inode *nfs_ilookup(struct super_block *sb, struct nfs_fattr *, struct nfs_fh *); |
1da177e4 | 359 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); |
decf491f | 360 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
70ca8852 | 361 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
a08a8cd3 | 362 | extern int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr); |
a528d35e | 363 | extern int nfs_getattr(const struct path *, struct kstat *, u32, unsigned int); |
6168f62c WAA |
364 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); |
365 | extern void nfs_access_set_mask(struct nfs_access_entry *, u32); | |
10556cb2 | 366 | extern int nfs_permission(struct inode *, int); |
1da177e4 | 367 | extern int nfs_open(struct inode *, struct file *); |
43f291cd | 368 | extern int nfs_attribute_cache_expired(struct inode *inode); |
1da177e4 LT |
369 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); |
370 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
1cd9cb05 | 371 | extern bool nfs_mapping_need_revalidate_inode(struct inode *inode); |
44b11874 | 372 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
0d0def49 | 373 | extern int nfs_revalidate_mapping_rcu(struct inode *inode); |
1da177e4 | 374 | extern int nfs_setattr(struct dentry *, struct iattr *); |
f044636d | 375 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, struct nfs_fattr *); |
aa9c2669 DQ |
376 | extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
377 | struct nfs4_label *label); | |
1da177e4 LT |
378 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
379 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
dc0b027d | 380 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode); |
532d4def | 381 | extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode, struct file *filp); |
c45ffdd2 | 382 | extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx); |
cd9a1c0e | 383 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); |
aff8d8dc | 384 | extern void nfs_file_clear_open_context(struct file *flip); |
f11ac8db TM |
385 | extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); |
386 | extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); | |
f43bf0be | 387 | extern u64 nfs_compat_user_ino64(u64 fileid); |
4704f0e2 | 388 | extern void nfs_fattr_init(struct nfs_fattr *fattr); |
140e049c | 389 | extern void nfs_fattr_set_barrier(struct nfs_fattr *fattr); |
56463e50 | 390 | extern unsigned long nfs_inc_attr_generation_counter(void); |
1da177e4 | 391 | |
2d36bfde TM |
392 | extern struct nfs_fattr *nfs_alloc_fattr(void); |
393 | ||
394 | static inline void nfs_free_fattr(const struct nfs_fattr *fattr) | |
395 | { | |
396 | kfree(fattr); | |
397 | } | |
398 | ||
399 | extern struct nfs_fh *nfs_alloc_fhandle(void); | |
400 | ||
401 | static inline void nfs_free_fhandle(const struct nfs_fh *fh) | |
402 | { | |
403 | kfree(fh); | |
404 | } | |
405 | ||
e27d359e | 406 | #ifdef NFS_DEBUG |
d8e0539e WAA |
407 | extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh); |
408 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
409 | { | |
410 | return _nfs_display_fhandle_hash(fh); | |
411 | } | |
20d27e92 CL |
412 | extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption); |
413 | #define nfs_display_fhandle(fh, caption) \ | |
414 | do { \ | |
415 | if (unlikely(nfs_debug & NFSDBG_FACILITY)) \ | |
416 | _nfs_display_fhandle(fh, caption); \ | |
417 | } while (0) | |
418 | #else | |
d8e0539e WAA |
419 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) |
420 | { | |
9304a812 | 421 | return 0; |
d8e0539e | 422 | } |
20d27e92 CL |
423 | static inline void nfs_display_fhandle(const struct nfs_fh *fh, |
424 | const char *caption) | |
425 | { | |
426 | } | |
427 | #endif | |
428 | ||
56463e50 CL |
429 | /* |
430 | * linux/fs/nfs/nfsroot.c | |
431 | */ | |
432 | extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ | |
1da177e4 | 433 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ |
5a874db4 | 434 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
0e574af1 | 435 | |
1da177e4 LT |
436 | /* |
437 | * linux/fs/nfs/file.c | |
438 | */ | |
4b6f5d20 | 439 | extern const struct file_operations nfs_file_operations; |
89d77c8f | 440 | #if IS_ENABLED(CONFIG_NFS_V4) |
1788ea6e JL |
441 | extern const struct file_operations nfs4_file_operations; |
442 | #endif /* CONFIG_NFS_V4 */ | |
f5e54d6e | 443 | extern const struct address_space_operations nfs_file_aops; |
11de3b11 | 444 | extern const struct address_space_operations nfs_dir_aops; |
1da177e4 | 445 | |
c03025d5 TM |
446 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
447 | { | |
448 | return filp->private_data; | |
449 | } | |
450 | ||
1da177e4 LT |
451 | static inline struct rpc_cred *nfs_file_cred(struct file *file) |
452 | { | |
504e5189 NB |
453 | if (file != NULL) { |
454 | struct nfs_open_context *ctx = | |
455 | nfs_file_open_context(file); | |
456 | if (ctx) | |
457 | return ctx->cred; | |
458 | } | |
1da177e4 LT |
459 | return NULL; |
460 | } | |
461 | ||
462 | /* | |
463 | * linux/fs/nfs/direct.c | |
464 | */ | |
c8b8e32d | 465 | extern ssize_t nfs_direct_IO(struct kiocb *, struct iov_iter *); |
027445c3 | 466 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, |
c8b8e32d | 467 | struct iov_iter *iter); |
027445c3 | 468 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, |
65a4a1ca | 469 | struct iov_iter *iter); |
1da177e4 LT |
470 | |
471 | /* | |
472 | * linux/fs/nfs/dir.c | |
473 | */ | |
4b6f5d20 | 474 | extern const struct file_operations nfs_dir_operations; |
f786aa90 | 475 | extern const struct dentry_operations nfs_dentry_operations; |
1da177e4 | 476 | |
bfc69a45 | 477 | extern void nfs_force_lookup_revalidate(struct inode *dir); |
1775fd3e DQ |
478 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, |
479 | struct nfs_fattr *fattr, struct nfs4_label *label); | |
af22f94a TM |
480 | extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags); |
481 | extern void nfs_access_zap_cache(struct inode *inode); | |
1da177e4 LT |
482 | |
483 | /* | |
484 | * linux/fs/nfs/symlink.c | |
485 | */ | |
c5ef1c42 | 486 | extern const struct inode_operations nfs_symlink_inode_operations; |
1da177e4 | 487 | |
a72b4422 TM |
488 | /* |
489 | * linux/fs/nfs/sysctl.c | |
490 | */ | |
491 | #ifdef CONFIG_SYSCTL | |
492 | extern int nfs_register_sysctl(void); | |
493 | extern void nfs_unregister_sysctl(void); | |
494 | #else | |
7fd105e7 | 495 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
496 | #define nfs_unregister_sysctl() do { } while(0) |
497 | #endif | |
498 | ||
55a97593 TM |
499 | /* |
500 | * linux/fs/nfs/namespace.c | |
501 | */ | |
c5ef1c42 AV |
502 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
503 | extern const struct inode_operations nfs_referral_inode_operations; | |
51d8fa6a TM |
504 | extern int nfs_mountpoint_expiry_timeout; |
505 | extern void nfs_release_automount_timer(void); | |
55a97593 | 506 | |
1da177e4 LT |
507 | /* |
508 | * linux/fs/nfs/unlink.c | |
509 | */ | |
e4eff1a6 | 510 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); |
1da177e4 LT |
511 | |
512 | /* | |
513 | * linux/fs/nfs/write.c | |
514 | */ | |
89a09141 | 515 | extern int nfs_congestion_kb; |
1da177e4 LT |
516 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
517 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
518 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
519 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
1da177e4 LT |
520 | |
521 | /* | |
522 | * Try to write back everything synchronously (but check the | |
523 | * return value!) | |
524 | */ | |
9e1681c2 | 525 | extern int nfs_sync_inode(struct inode *inode); |
1c75950b | 526 | extern int nfs_wb_all(struct inode *inode); |
c373fff7 | 527 | extern int nfs_wb_page(struct inode *inode, struct page *page); |
1b3b4a1a | 528 | extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); |
b608b283 | 529 | extern int nfs_commit_inode(struct inode *, int); |
518662e0 | 530 | extern struct nfs_commit_data *nfs_commitdata_alloc(bool never_fail); |
0b7c0153 | 531 | extern void nfs_commit_free(struct nfs_commit_data *data); |
1da177e4 LT |
532 | |
533 | static inline int | |
534 | nfs_have_writebacks(struct inode *inode) | |
535 | { | |
a6b6d5b8 | 536 | return atomic_long_read(&NFS_I(inode)->nrequests) != 0; |
1da177e4 LT |
537 | } |
538 | ||
1da177e4 LT |
539 | /* |
540 | * linux/fs/nfs/read.c | |
541 | */ | |
542 | extern int nfs_readpage(struct file *, struct page *); | |
543 | extern int nfs_readpages(struct file *, struct address_space *, | |
544 | struct list_head *, unsigned); | |
f42b293d DH |
545 | extern int nfs_readpage_async(struct nfs_open_context *, struct inode *, |
546 | struct page *); | |
963d8fe5 | 547 | |
1da177e4 LT |
548 | /* |
549 | * inline functions | |
550 | */ | |
551 | ||
433c9237 | 552 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
1da177e4 | 553 | { |
50ab8ec7 | 554 | return min_t(u64, size, OFFSET_MAX); |
1da177e4 LT |
555 | } |
556 | ||
557 | static inline ino_t | |
558 | nfs_fileid_to_ino_t(u64 fileid) | |
559 | { | |
560 | ino_t ino = (ino_t) fileid; | |
561 | if (sizeof(ino_t) < sizeof(u64)) | |
562 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
563 | return ino; | |
564 | } | |
565 | ||
1da177e4 LT |
566 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) |
567 | ||
4dc2eaec | 568 | |
1da177e4 LT |
569 | # undef ifdebug |
570 | # ifdef NFS_DEBUG | |
571 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
6f00866d | 572 | # define NFS_IFDEBUG(x) x |
1da177e4 LT |
573 | # else |
574 | # define ifdebug(fac) if (0) | |
6f00866d | 575 | # define NFS_IFDEBUG(x) |
1da177e4 | 576 | # endif |
1da177e4 | 577 | #endif |