]>
Commit | Line | Data |
---|---|---|
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 | ||
7e134205 OK |
43 | /* |
44 | * These are the default for number of transports to different server IPs | |
45 | */ | |
46 | #define NFS_MAX_TRANSPORTS 16 | |
47 | ||
7f1cbe51 DW |
48 | /* |
49 | * These are the default flags for swap requests | |
50 | */ | |
51 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) | |
52 | ||
b593c09f TM |
53 | /* |
54 | * Size of the NFS directory verifier | |
55 | */ | |
56 | #define NFS_DIR_VERIFIER_SIZE 2 | |
57 | ||
1da177e4 LT |
58 | /* |
59 | * NFSv3/v4 Access mode cache entry | |
60 | */ | |
61 | struct nfs_access_entry { | |
1c3c07e9 | 62 | struct rb_node rb_node; |
cfcea3e8 | 63 | struct list_head lru; |
b68572e0 | 64 | const struct cred * cred; |
bd8b2441 | 65 | __u32 mask; |
f682a398 | 66 | struct rcu_head rcu_head; |
1da177e4 LT |
67 | }; |
68 | ||
f11ac8db | 69 | struct nfs_lock_context { |
2f62b5aa | 70 | refcount_t count; |
f11ac8db TM |
71 | struct list_head list; |
72 | struct nfs_open_context *open_context; | |
d51fdb87 | 73 | fl_owner_t lockowner; |
210c7c17 | 74 | atomic_t io_count; |
1db97eaa | 75 | struct rcu_head rcu_head; |
f11ac8db TM |
76 | }; |
77 | ||
1da177e4 LT |
78 | struct nfs4_state; |
79 | struct nfs_open_context { | |
f11ac8db | 80 | struct nfs_lock_context lock_context; |
532d4def | 81 | fl_owner_t flock_owner; |
3d4ff43d | 82 | struct dentry *dentry; |
a52458b4 | 83 | const struct cred *cred; |
ddf529ee | 84 | struct rpc_cred *ll_cred; /* low-level cred - use to check for expiry */ |
1da177e4 | 85 | struct nfs4_state *state; |
dc0b027d | 86 | fmode_t mode; |
7b159fc1 TM |
87 | |
88 | unsigned long flags; | |
05990d1b | 89 | #define NFS_CONTEXT_RESEND_WRITES (1) |
c58c8441 | 90 | #define NFS_CONTEXT_BAD (2) |
7d6ddf88 | 91 | #define NFS_CONTEXT_UNLOCK (3) |
e97bc663 | 92 | #define NFS_CONTEXT_FILE_OPEN (4) |
1da177e4 LT |
93 | int error; |
94 | ||
95 | struct list_head list; | |
82be417a | 96 | struct nfs4_threshold *mdsthreshold; |
0de43976 | 97 | struct rcu_head rcu_head; |
480c2006 | 98 | }; |
00a92642 | 99 | |
480c2006 | 100 | struct nfs_open_dir_context { |
311324ad | 101 | struct list_head list; |
0c030806 | 102 | unsigned long attr_gencount; |
b593c09f | 103 | __be32 verf[NFS_DIR_VERIFIER_SIZE]; |
00a92642 | 104 | __u64 dir_cookie; |
8ef2ce3e | 105 | __u64 dup_cookie; |
0c030806 | 106 | signed char duped; |
1da177e4 LT |
107 | }; |
108 | ||
109 | /* | |
110 | * NFSv4 delegation | |
111 | */ | |
112 | struct nfs_delegation; | |
113 | ||
5c6a9f7d AG |
114 | struct posix_acl; |
115 | ||
95ad37f9 FL |
116 | struct nfs4_xattr_cache; |
117 | ||
1da177e4 LT |
118 | /* |
119 | * nfs fs inode data in memory | |
120 | */ | |
121 | struct nfs_inode { | |
122 | /* | |
123 | * The 64bit 'inode number' | |
124 | */ | |
125 | __u64 fileid; | |
126 | ||
127 | /* | |
128 | * NFS file handle | |
129 | */ | |
130 | struct nfs_fh fh; | |
131 | ||
132 | /* | |
133 | * Various flags | |
134 | */ | |
412d582e CL |
135 | unsigned long flags; /* atomic bit ops */ |
136 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
137 | |
138 | /* | |
24bd68f4 | 139 | * read_cache_jiffies is when we started read-caching this inode. |
1da177e4 LT |
140 | * attrtimeo is for how long the cached information is assumed |
141 | * to be valid. A successful attribute revalidation doubles | |
142 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
143 | * acregmin/acdirmin. | |
144 | * | |
145 | * We need to revalidate the cached attrs for this inode if | |
146 | * | |
64672d55 PS |
147 | * jiffies - read_cache_jiffies >= attrtimeo |
148 | * | |
149 | * Please note the comparison is greater than or equal | |
150 | * so that zero timeout values can be specified. | |
1da177e4 | 151 | */ |
1da177e4 LT |
152 | unsigned long read_cache_jiffies; |
153 | unsigned long attrtimeo; | |
154 | unsigned long attrtimeo_timestamp; | |
1da177e4 | 155 | |
4704f0e2 | 156 | unsigned long attr_gencount; |
1da177e4 LT |
157 | /* "Generation counter" for the attribute cache. This is |
158 | * bumped whenever we update the metadata on the | |
159 | * server. | |
160 | */ | |
161 | unsigned long cache_change_attribute; | |
1da177e4 | 162 | |
1c3c07e9 | 163 | struct rb_root access_cache; |
cfcea3e8 TM |
164 | struct list_head access_cache_entry_lru; |
165 | struct list_head access_cache_inode_lru; | |
1da177e4 LT |
166 | |
167 | /* | |
168 | * This is the cookie verifier used for NFSv3 readdir | |
169 | * operations | |
170 | */ | |
b593c09f | 171 | __be32 cookieverf[NFS_DIR_VERIFIER_SIZE]; |
1da177e4 | 172 | |
a6b6d5b8 | 173 | atomic_long_t nrequests; |
ea2cf228 | 174 | struct nfs_mds_commit_info commit_info; |
1da177e4 LT |
175 | |
176 | /* Open contexts for shared mmap writes */ | |
177 | struct list_head open_files; | |
178 | ||
884be175 AV |
179 | /* Readers: in-flight sillydelete RPC calls */ |
180 | /* Writers: rmdir */ | |
181 | struct rw_semaphore rmdir_sem; | |
e824f99a | 182 | struct mutex commit_mutex; |
565277f6 | 183 | |
227823d2 DN |
184 | /* track last access to cached pages */ |
185 | unsigned long page_index; | |
186 | ||
89d77c8f | 187 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e | 188 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
189 | /* NFSv4 state */ |
190 | struct list_head open_states; | |
5b22216e | 191 | struct nfs_delegation __rcu *delegation; |
1da177e4 | 192 | struct rw_semaphore rwsem; |
e5e94017 BH |
193 | |
194 | /* pNFS layout information */ | |
195 | struct pnfs_layout_hdr *layout; | |
1da177e4 | 196 | #endif /* CONFIG_NFS_V4*/ |
2701d086 AA |
197 | /* how many bytes have been written/read and how many bytes queued up */ |
198 | __u64 write_io; | |
199 | __u64 read_io; | |
ef79c097 DH |
200 | #ifdef CONFIG_NFS_FSCACHE |
201 | struct fscache_cookie *fscache; | |
202 | #endif | |
1da177e4 | 203 | struct inode vfs_inode; |
95ad37f9 FL |
204 | |
205 | #ifdef CONFIG_NFS_V4_2 | |
206 | struct nfs4_xattr_cache *xattr_cache; | |
207 | #endif | |
1da177e4 LT |
208 | }; |
209 | ||
62164f31 OK |
210 | struct nfs4_copy_state { |
211 | struct list_head copies; | |
0e65a32c | 212 | struct list_head src_copies; |
62164f31 OK |
213 | nfs4_stateid stateid; |
214 | struct completion completion; | |
215 | uint64_t count; | |
216 | struct nfs_writeverf verf; | |
217 | int error; | |
e4648aa4 | 218 | int flags; |
0e65a32c OK |
219 | struct nfs4_state *parent_src_state; |
220 | struct nfs4_state *parent_dst_state; | |
62164f31 OK |
221 | }; |
222 | ||
3c181827 AS |
223 | /* |
224 | * Access bit flags | |
225 | */ | |
226 | #define NFS_ACCESS_READ 0x0001 | |
227 | #define NFS_ACCESS_LOOKUP 0x0002 | |
228 | #define NFS_ACCESS_MODIFY 0x0004 | |
229 | #define NFS_ACCESS_EXTEND 0x0008 | |
230 | #define NFS_ACCESS_DELETE 0x0010 | |
231 | #define NFS_ACCESS_EXECUTE 0x0020 | |
9a67fcc8 FL |
232 | #define NFS_ACCESS_XAREAD 0x0040 |
233 | #define NFS_ACCESS_XAWRITE 0x0080 | |
234 | #define NFS_ACCESS_XALIST 0x0100 | |
3c181827 | 235 | |
1da177e4 | 236 | /* |
55296809 | 237 | * Cache validity bit flags |
1da177e4 | 238 | */ |
90972882 TM |
239 | #define NFS_INO_INVALID_DATA BIT(1) /* cached data is invalid */ |
240 | #define NFS_INO_INVALID_ATIME BIT(2) /* cached atime is invalid */ | |
241 | #define NFS_INO_INVALID_ACCESS BIT(3) /* cached access cred invalid */ | |
242 | #define NFS_INO_INVALID_ACL BIT(4) /* cached acls are invalid */ | |
243 | #define NFS_INO_REVAL_PAGECACHE BIT(5) /* must revalidate pagecache */ | |
244 | #define NFS_INO_REVAL_FORCED BIT(6) /* force revalidation ignoring a delegation */ | |
245 | #define NFS_INO_INVALID_LABEL BIT(7) /* cached label is invalid */ | |
16e14375 TM |
246 | #define NFS_INO_INVALID_CHANGE BIT(8) /* cached change is invalid */ |
247 | #define NFS_INO_INVALID_CTIME BIT(9) /* cached ctime is invalid */ | |
248 | #define NFS_INO_INVALID_MTIME BIT(10) /* cached mtime is invalid */ | |
249 | #define NFS_INO_INVALID_SIZE BIT(11) /* cached size is invalid */ | |
250 | #define NFS_INO_INVALID_OTHER BIT(12) /* other attrs are invalid */ | |
1c341b77 TM |
251 | #define NFS_INO_DATA_INVAL_DEFER \ |
252 | BIT(13) /* Deferred cache invalidation */ | |
3a39e778 | 253 | #define NFS_INO_INVALID_BLOCKS BIT(14) /* cached blocks are invalid */ |
0f44da51 | 254 | #define NFS_INO_INVALID_XATTR BIT(15) /* xattrs are invalid */ |
fabf2b34 | 255 | #define NFS_INO_INVALID_NLINK BIT(16) /* cached nlinks is invalid */ |
720869eb | 256 | #define NFS_INO_INVALID_MODE BIT(17) /* cached mode is invalid */ |
16e14375 TM |
257 | |
258 | #define NFS_INO_INVALID_ATTR (NFS_INO_INVALID_CHANGE \ | |
259 | | NFS_INO_INVALID_CTIME \ | |
260 | | NFS_INO_INVALID_MTIME \ | |
261 | | NFS_INO_INVALID_SIZE \ | |
fabf2b34 | 262 | | NFS_INO_INVALID_NLINK \ |
720869eb | 263 | | NFS_INO_INVALID_MODE \ |
16e14375 | 264 | | NFS_INO_INVALID_OTHER) /* inode metadata is invalid */ |
55296809 CL |
265 | |
266 | /* | |
412d582e | 267 | * Bit offsets in flags field |
55296809 | 268 | */ |
691beb13 TM |
269 | #define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */ |
270 | #define NFS_INO_STALE (1) /* possible stale inode */ | |
271 | #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ | |
d529ef83 | 272 | #define NFS_INO_INVALIDATING (3) /* inode is being invalidated */ |
ef79c097 DH |
273 | #define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ |
274 | #define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */ | |
863a3c6c | 275 | #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ |
92407e75 | 276 | #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ |
1bfe3b25 | 277 | #define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */ |
a5864c99 | 278 | #define NFS_INO_ODIRECT (12) /* I/O setting is O_DIRECT */ |
1da177e4 | 279 | |
99fadcd7 | 280 | static inline struct nfs_inode *NFS_I(const struct inode *inode) |
1da177e4 LT |
281 | { |
282 | return container_of(inode, struct nfs_inode, vfs_inode); | |
283 | } | |
99fadcd7 BH |
284 | |
285 | static inline struct nfs_server *NFS_SB(const struct super_block *s) | |
286 | { | |
287 | return (struct nfs_server *)(s->s_fs_info); | |
288 | } | |
289 | ||
290 | static inline struct nfs_fh *NFS_FH(const struct inode *inode) | |
291 | { | |
292 | return &NFS_I(inode)->fh; | |
293 | } | |
294 | ||
295 | static inline struct nfs_server *NFS_SERVER(const struct inode *inode) | |
296 | { | |
297 | return NFS_SB(inode->i_sb); | |
298 | } | |
299 | ||
300 | static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) | |
301 | { | |
302 | return NFS_SERVER(inode)->client; | |
303 | } | |
304 | ||
305 | static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) | |
306 | { | |
307 | return NFS_SERVER(inode)->nfs_client->rpc_ops; | |
308 | } | |
309 | ||
99fadcd7 BH |
310 | static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) |
311 | { | |
312 | struct nfs_server *nfss = NFS_SERVER(inode); | |
313 | return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; | |
314 | } | |
315 | ||
316 | static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) | |
317 | { | |
318 | struct nfs_server *nfss = NFS_SERVER(inode); | |
319 | return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; | |
320 | } | |
321 | ||
322 | static inline int NFS_STALE(const struct inode *inode) | |
323 | { | |
324 | return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); | |
325 | } | |
326 | ||
f1fe29b4 | 327 | static inline struct fscache_cookie *nfs_i_fscache(struct inode *inode) |
ef79c097 | 328 | { |
f1fe29b4 DH |
329 | #ifdef CONFIG_NFS_FSCACHE |
330 | return NFS_I(inode)->fscache; | |
331 | #else | |
332 | return NULL; | |
333 | #endif | |
ef79c097 DH |
334 | } |
335 | ||
99fadcd7 BH |
336 | static inline __u64 NFS_FILEID(const struct inode *inode) |
337 | { | |
338 | return NFS_I(inode)->fileid; | |
339 | } | |
340 | ||
341 | static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) | |
342 | { | |
343 | NFS_I(inode)->fileid = fileid; | |
344 | } | |
1da177e4 | 345 | |
decf491f TM |
346 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
347 | { | |
38478b24 TM |
348 | struct nfs_inode *nfsi = NFS_I(inode); |
349 | ||
decf491f | 350 | spin_lock(&inode->i_lock); |
16e14375 TM |
351 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE |
352 | | NFS_INO_INVALID_ACCESS | |
353 | | NFS_INO_INVALID_ACL | |
354 | | NFS_INO_INVALID_CHANGE | |
355 | | NFS_INO_INVALID_CTIME; | |
f3821110 | 356 | if (S_ISDIR(inode->i_mode)) |
115c48d7 | 357 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
decf491f TM |
358 | spin_unlock(&inode->i_lock); |
359 | } | |
360 | ||
1da177e4 LT |
361 | static inline int nfs_server_capable(struct inode *inode, int cap) |
362 | { | |
363 | return NFS_SERVER(inode)->caps & cap; | |
364 | } | |
365 | ||
1da177e4 LT |
366 | /** |
367 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
8edb0182 | 368 | * @dir - pointer to parent directory inode |
efeda80d TM |
369 | * The "cache change attribute" is updated when we need to revalidate |
370 | * our dentry cache after a directory was seen to change on the server. | |
1da177e4 | 371 | */ |
8edb0182 | 372 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
1da177e4 | 373 | { |
8edb0182 | 374 | return NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
375 | } |
376 | ||
1da177e4 LT |
377 | /* |
378 | * linux/fs/nfs/inode.c | |
379 | */ | |
29884df0 | 380 | extern int nfs_sync_mapping(struct address_space *mapping); |
cd9ae2b6 | 381 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 382 | extern void nfs_zap_caches(struct inode *); |
93ce4af7 | 383 | extern void nfs_set_inode_stale(struct inode *inode); |
c4812998 | 384 | extern void nfs_invalidate_atime(struct inode *); |
1da177e4 | 385 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
1775fd3e | 386 | struct nfs_fattr *, struct nfs4_label *); |
f174ff7a | 387 | struct inode *nfs_ilookup(struct super_block *sb, struct nfs_fattr *, struct nfs_fh *); |
1da177e4 | 388 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); |
decf491f | 389 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
70ca8852 | 390 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
a08a8cd3 | 391 | extern int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr); |
549c7297 CB |
392 | extern int nfs_getattr(struct user_namespace *, const struct path *, |
393 | struct kstat *, u32, unsigned int); | |
6168f62c WAA |
394 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); |
395 | extern void nfs_access_set_mask(struct nfs_access_entry *, u32); | |
549c7297 | 396 | extern int nfs_permission(struct user_namespace *, struct inode *, int); |
1da177e4 | 397 | extern int nfs_open(struct inode *, struct file *); |
43f291cd | 398 | extern int nfs_attribute_cache_expired(struct inode *inode); |
1f3208b2 | 399 | extern int nfs_revalidate_inode(struct inode *inode, unsigned long flags); |
1da177e4 | 400 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); |
28aa2f9e | 401 | extern int nfs_clear_invalid_mapping(struct address_space *mapping); |
1cd9cb05 | 402 | extern bool nfs_mapping_need_revalidate_inode(struct inode *inode); |
44b11874 | 403 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
0d0def49 | 404 | extern int nfs_revalidate_mapping_rcu(struct inode *inode); |
549c7297 | 405 | extern int nfs_setattr(struct user_namespace *, struct dentry *, struct iattr *); |
f044636d | 406 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, struct nfs_fattr *); |
aa9c2669 DQ |
407 | extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
408 | struct nfs4_label *label); | |
1da177e4 LT |
409 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
410 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
a52458b4 | 411 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode); |
532d4def | 412 | extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode, struct file *filp); |
c45ffdd2 | 413 | extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx); |
cd9a1c0e | 414 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); |
aff8d8dc | 415 | extern void nfs_file_clear_open_context(struct file *flip); |
f11ac8db TM |
416 | extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); |
417 | extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); | |
f43bf0be | 418 | extern u64 nfs_compat_user_ino64(u64 fileid); |
4704f0e2 | 419 | extern void nfs_fattr_init(struct nfs_fattr *fattr); |
140e049c | 420 | extern void nfs_fattr_set_barrier(struct nfs_fattr *fattr); |
56463e50 | 421 | extern unsigned long nfs_inc_attr_generation_counter(void); |
1da177e4 | 422 | |
2d36bfde TM |
423 | extern struct nfs_fattr *nfs_alloc_fattr(void); |
424 | ||
425 | static inline void nfs_free_fattr(const struct nfs_fattr *fattr) | |
426 | { | |
427 | kfree(fattr); | |
428 | } | |
429 | ||
430 | extern struct nfs_fh *nfs_alloc_fhandle(void); | |
431 | ||
432 | static inline void nfs_free_fhandle(const struct nfs_fh *fh) | |
433 | { | |
434 | kfree(fh); | |
435 | } | |
436 | ||
e27d359e | 437 | #ifdef NFS_DEBUG |
d8e0539e WAA |
438 | extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh); |
439 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
440 | { | |
441 | return _nfs_display_fhandle_hash(fh); | |
442 | } | |
20d27e92 CL |
443 | extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption); |
444 | #define nfs_display_fhandle(fh, caption) \ | |
445 | do { \ | |
446 | if (unlikely(nfs_debug & NFSDBG_FACILITY)) \ | |
447 | _nfs_display_fhandle(fh, caption); \ | |
448 | } while (0) | |
449 | #else | |
d8e0539e WAA |
450 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) |
451 | { | |
9304a812 | 452 | return 0; |
d8e0539e | 453 | } |
20d27e92 CL |
454 | static inline void nfs_display_fhandle(const struct nfs_fh *fh, |
455 | const char *caption) | |
456 | { | |
457 | } | |
458 | #endif | |
459 | ||
56463e50 CL |
460 | /* |
461 | * linux/fs/nfs/nfsroot.c | |
462 | */ | |
463 | extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ | |
1da177e4 | 464 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ |
5a874db4 | 465 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
0e574af1 | 466 | |
1da177e4 LT |
467 | /* |
468 | * linux/fs/nfs/file.c | |
469 | */ | |
4b6f5d20 | 470 | extern const struct file_operations nfs_file_operations; |
89d77c8f | 471 | #if IS_ENABLED(CONFIG_NFS_V4) |
1788ea6e JL |
472 | extern const struct file_operations nfs4_file_operations; |
473 | #endif /* CONFIG_NFS_V4 */ | |
f5e54d6e | 474 | extern const struct address_space_operations nfs_file_aops; |
11de3b11 | 475 | extern const struct address_space_operations nfs_dir_aops; |
1da177e4 | 476 | |
c03025d5 TM |
477 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
478 | { | |
479 | return filp->private_data; | |
480 | } | |
481 | ||
a52458b4 | 482 | static inline const struct cred *nfs_file_cred(struct file *file) |
1da177e4 | 483 | { |
504e5189 NB |
484 | if (file != NULL) { |
485 | struct nfs_open_context *ctx = | |
486 | nfs_file_open_context(file); | |
487 | if (ctx) | |
488 | return ctx->cred; | |
489 | } | |
1da177e4 LT |
490 | return NULL; |
491 | } | |
492 | ||
493 | /* | |
494 | * linux/fs/nfs/direct.c | |
495 | */ | |
c8b8e32d | 496 | extern ssize_t nfs_direct_IO(struct kiocb *, struct iov_iter *); |
d15c836d N |
497 | ssize_t nfs_file_direct_read(struct kiocb *iocb, |
498 | struct iov_iter *iter, bool swap); | |
499 | ssize_t nfs_file_direct_write(struct kiocb *iocb, | |
500 | struct iov_iter *iter, bool swap); | |
1da177e4 LT |
501 | |
502 | /* | |
503 | * linux/fs/nfs/dir.c | |
504 | */ | |
4b6f5d20 | 505 | extern const struct file_operations nfs_dir_operations; |
f786aa90 | 506 | extern const struct dentry_operations nfs_dentry_operations; |
1da177e4 | 507 | |
bfc69a45 | 508 | extern void nfs_force_lookup_revalidate(struct inode *dir); |
efeda80d TM |
509 | extern void nfs_set_verifier(struct dentry * dentry, unsigned long verf); |
510 | #if IS_ENABLED(CONFIG_NFS_V4) | |
511 | extern void nfs_clear_verifier_delegated(struct inode *inode); | |
512 | #endif /* IS_ENABLED(CONFIG_NFS_V4) */ | |
406cd915 BC |
513 | extern struct dentry *nfs_add_or_obtain(struct dentry *dentry, |
514 | struct nfs_fh *fh, struct nfs_fattr *fattr, | |
515 | struct nfs4_label *label); | |
1775fd3e DQ |
516 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, |
517 | struct nfs_fattr *fattr, struct nfs4_label *label); | |
b68572e0 | 518 | extern int nfs_may_open(struct inode *inode, const struct cred *cred, int openflags); |
af22f94a | 519 | extern void nfs_access_zap_cache(struct inode *inode); |
0ddcf42b N |
520 | extern int nfs_access_get_cached(struct inode *inode, const struct cred *cred, |
521 | u32 *mask, bool may_block); | |
1da177e4 LT |
522 | |
523 | /* | |
524 | * linux/fs/nfs/symlink.c | |
525 | */ | |
c5ef1c42 | 526 | extern const struct inode_operations nfs_symlink_inode_operations; |
1da177e4 | 527 | |
a72b4422 TM |
528 | /* |
529 | * linux/fs/nfs/sysctl.c | |
530 | */ | |
531 | #ifdef CONFIG_SYSCTL | |
532 | extern int nfs_register_sysctl(void); | |
533 | extern void nfs_unregister_sysctl(void); | |
534 | #else | |
7fd105e7 | 535 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
536 | #define nfs_unregister_sysctl() do { } while(0) |
537 | #endif | |
538 | ||
55a97593 TM |
539 | /* |
540 | * linux/fs/nfs/namespace.c | |
541 | */ | |
c5ef1c42 AV |
542 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
543 | extern const struct inode_operations nfs_referral_inode_operations; | |
51d8fa6a TM |
544 | extern int nfs_mountpoint_expiry_timeout; |
545 | extern void nfs_release_automount_timer(void); | |
55a97593 | 546 | |
1da177e4 LT |
547 | /* |
548 | * linux/fs/nfs/unlink.c | |
549 | */ | |
e4eff1a6 | 550 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); |
1da177e4 LT |
551 | |
552 | /* | |
553 | * linux/fs/nfs/write.c | |
554 | */ | |
89a09141 | 555 | extern int nfs_congestion_kb; |
1da177e4 LT |
556 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
557 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
558 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
559 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
1da177e4 LT |
560 | |
561 | /* | |
562 | * Try to write back everything synchronously (but check the | |
563 | * return value!) | |
564 | */ | |
9e1681c2 | 565 | extern int nfs_sync_inode(struct inode *inode); |
1c75950b | 566 | extern int nfs_wb_all(struct inode *inode); |
c373fff7 | 567 | extern int nfs_wb_page(struct inode *inode, struct page *page); |
1b3b4a1a | 568 | extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); |
b608b283 | 569 | extern int nfs_commit_inode(struct inode *, int); |
83cd44e8 | 570 | extern struct nfs_commit_data *nfs_commitdata_alloc(void); |
0b7c0153 | 571 | extern void nfs_commit_free(struct nfs_commit_data *data); |
c51ad6c3 | 572 | bool nfs_commit_end(struct nfs_mds_commit_info *cinfo); |
1da177e4 LT |
573 | |
574 | static inline int | |
575 | nfs_have_writebacks(struct inode *inode) | |
576 | { | |
a6b6d5b8 | 577 | return atomic_long_read(&NFS_I(inode)->nrequests) != 0; |
1da177e4 LT |
578 | } |
579 | ||
1da177e4 LT |
580 | /* |
581 | * linux/fs/nfs/read.c | |
582 | */ | |
583 | extern int nfs_readpage(struct file *, struct page *); | |
584 | extern int nfs_readpages(struct file *, struct address_space *, | |
585 | struct list_head *, unsigned); | |
963d8fe5 | 586 | |
1da177e4 LT |
587 | /* |
588 | * inline functions | |
589 | */ | |
590 | ||
433c9237 | 591 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
1da177e4 | 592 | { |
50ab8ec7 | 593 | return min_t(u64, size, OFFSET_MAX); |
1da177e4 LT |
594 | } |
595 | ||
596 | static inline ino_t | |
597 | nfs_fileid_to_ino_t(u64 fileid) | |
598 | { | |
599 | ino_t ino = (ino_t) fileid; | |
600 | if (sizeof(ino_t) < sizeof(u64)) | |
601 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
602 | return ino; | |
603 | } | |
604 | ||
1da177e4 LT |
605 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) |
606 | ||
4dc2eaec | 607 | |
1da177e4 LT |
608 | # undef ifdebug |
609 | # ifdef NFS_DEBUG | |
610 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
6f00866d | 611 | # define NFS_IFDEBUG(x) x |
1da177e4 LT |
612 | # else |
613 | # define ifdebug(fac) if (0) | |
6f00866d | 614 | # define NFS_IFDEBUG(x) |
1da177e4 | 615 | # endif |
1da177e4 | 616 | #endif |