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 | ||
43 | /* | |
44 | * These are the default flags for swap requests | |
45 | */ | |
46 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) | |
47 | ||
b593c09f TM |
48 | /* |
49 | * Size of the NFS directory verifier | |
50 | */ | |
51 | #define NFS_DIR_VERIFIER_SIZE 2 | |
52 | ||
1da177e4 LT |
53 | /* |
54 | * NFSv3/v4 Access mode cache entry | |
55 | */ | |
56 | struct nfs_access_entry { | |
1c3c07e9 | 57 | struct rb_node rb_node; |
cfcea3e8 | 58 | struct list_head lru; |
b68572e0 | 59 | const struct cred * cred; |
bd8b2441 | 60 | __u32 mask; |
f682a398 | 61 | struct rcu_head rcu_head; |
1da177e4 LT |
62 | }; |
63 | ||
f11ac8db | 64 | struct nfs_lock_context { |
2f62b5aa | 65 | refcount_t count; |
f11ac8db TM |
66 | struct list_head list; |
67 | struct nfs_open_context *open_context; | |
d51fdb87 | 68 | fl_owner_t lockowner; |
210c7c17 | 69 | atomic_t io_count; |
1db97eaa | 70 | struct rcu_head rcu_head; |
f11ac8db TM |
71 | }; |
72 | ||
1da177e4 LT |
73 | struct nfs4_state; |
74 | struct nfs_open_context { | |
f11ac8db | 75 | struct nfs_lock_context lock_context; |
532d4def | 76 | fl_owner_t flock_owner; |
3d4ff43d | 77 | struct dentry *dentry; |
a52458b4 | 78 | const struct cred *cred; |
ddf529ee | 79 | struct rpc_cred *ll_cred; /* low-level cred - use to check for expiry */ |
1da177e4 | 80 | struct nfs4_state *state; |
dc0b027d | 81 | fmode_t mode; |
7b159fc1 TM |
82 | |
83 | unsigned long flags; | |
05990d1b | 84 | #define NFS_CONTEXT_RESEND_WRITES (1) |
c58c8441 | 85 | #define NFS_CONTEXT_BAD (2) |
7d6ddf88 | 86 | #define NFS_CONTEXT_UNLOCK (3) |
1da177e4 LT |
87 | int error; |
88 | ||
89 | struct list_head list; | |
82be417a | 90 | struct nfs4_threshold *mdsthreshold; |
0de43976 | 91 | struct rcu_head rcu_head; |
480c2006 | 92 | }; |
00a92642 | 93 | |
480c2006 | 94 | struct nfs_open_dir_context { |
311324ad | 95 | struct list_head list; |
0c030806 | 96 | unsigned long attr_gencount; |
b593c09f | 97 | __be32 verf[NFS_DIR_VERIFIER_SIZE]; |
00a92642 | 98 | __u64 dir_cookie; |
8ef2ce3e | 99 | __u64 dup_cookie; |
0c030806 | 100 | signed char duped; |
1da177e4 LT |
101 | }; |
102 | ||
103 | /* | |
104 | * NFSv4 delegation | |
105 | */ | |
106 | struct nfs_delegation; | |
107 | ||
5c6a9f7d AG |
108 | struct posix_acl; |
109 | ||
95ad37f9 FL |
110 | struct nfs4_xattr_cache; |
111 | ||
1da177e4 LT |
112 | /* |
113 | * nfs fs inode data in memory | |
114 | */ | |
115 | struct nfs_inode { | |
116 | /* | |
117 | * The 64bit 'inode number' | |
118 | */ | |
119 | __u64 fileid; | |
120 | ||
121 | /* | |
122 | * NFS file handle | |
123 | */ | |
124 | struct nfs_fh fh; | |
125 | ||
126 | /* | |
127 | * Various flags | |
128 | */ | |
412d582e CL |
129 | unsigned long flags; /* atomic bit ops */ |
130 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
131 | |
132 | /* | |
24bd68f4 | 133 | * read_cache_jiffies is when we started read-caching this inode. |
1da177e4 LT |
134 | * attrtimeo is for how long the cached information is assumed |
135 | * to be valid. A successful attribute revalidation doubles | |
136 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
137 | * acregmin/acdirmin. | |
138 | * | |
139 | * We need to revalidate the cached attrs for this inode if | |
140 | * | |
64672d55 PS |
141 | * jiffies - read_cache_jiffies >= attrtimeo |
142 | * | |
143 | * Please note the comparison is greater than or equal | |
144 | * so that zero timeout values can be specified. | |
1da177e4 | 145 | */ |
1da177e4 LT |
146 | unsigned long read_cache_jiffies; |
147 | unsigned long attrtimeo; | |
148 | unsigned long attrtimeo_timestamp; | |
1da177e4 | 149 | |
4704f0e2 | 150 | unsigned long attr_gencount; |
1da177e4 LT |
151 | /* "Generation counter" for the attribute cache. This is |
152 | * bumped whenever we update the metadata on the | |
153 | * server. | |
154 | */ | |
155 | unsigned long cache_change_attribute; | |
1da177e4 | 156 | |
1c3c07e9 | 157 | struct rb_root access_cache; |
cfcea3e8 TM |
158 | struct list_head access_cache_entry_lru; |
159 | struct list_head access_cache_inode_lru; | |
1da177e4 LT |
160 | |
161 | /* | |
162 | * This is the cookie verifier used for NFSv3 readdir | |
163 | * operations | |
164 | */ | |
b593c09f | 165 | __be32 cookieverf[NFS_DIR_VERIFIER_SIZE]; |
1da177e4 | 166 | |
a6b6d5b8 | 167 | atomic_long_t nrequests; |
ea2cf228 | 168 | struct nfs_mds_commit_info commit_info; |
1da177e4 LT |
169 | |
170 | /* Open contexts for shared mmap writes */ | |
171 | struct list_head open_files; | |
172 | ||
884be175 AV |
173 | /* Readers: in-flight sillydelete RPC calls */ |
174 | /* Writers: rmdir */ | |
175 | struct rw_semaphore rmdir_sem; | |
e824f99a | 176 | struct mutex commit_mutex; |
565277f6 | 177 | |
227823d2 DN |
178 | /* track last access to cached pages */ |
179 | unsigned long page_index; | |
180 | ||
89d77c8f | 181 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e | 182 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
183 | /* NFSv4 state */ |
184 | struct list_head open_states; | |
5b22216e | 185 | struct nfs_delegation __rcu *delegation; |
1da177e4 | 186 | struct rw_semaphore rwsem; |
e5e94017 BH |
187 | |
188 | /* pNFS layout information */ | |
189 | struct pnfs_layout_hdr *layout; | |
1da177e4 | 190 | #endif /* CONFIG_NFS_V4*/ |
2701d086 AA |
191 | /* how many bytes have been written/read and how many bytes queued up */ |
192 | __u64 write_io; | |
193 | __u64 read_io; | |
ef79c097 DH |
194 | #ifdef CONFIG_NFS_FSCACHE |
195 | struct fscache_cookie *fscache; | |
196 | #endif | |
1da177e4 | 197 | struct inode vfs_inode; |
95ad37f9 FL |
198 | |
199 | #ifdef CONFIG_NFS_V4_2 | |
200 | struct nfs4_xattr_cache *xattr_cache; | |
201 | #endif | |
1da177e4 LT |
202 | }; |
203 | ||
62164f31 OK |
204 | struct nfs4_copy_state { |
205 | struct list_head copies; | |
0e65a32c | 206 | struct list_head src_copies; |
62164f31 OK |
207 | nfs4_stateid stateid; |
208 | struct completion completion; | |
209 | uint64_t count; | |
210 | struct nfs_writeverf verf; | |
211 | int error; | |
e4648aa4 | 212 | int flags; |
0e65a32c OK |
213 | struct nfs4_state *parent_src_state; |
214 | struct nfs4_state *parent_dst_state; | |
62164f31 OK |
215 | }; |
216 | ||
3c181827 AS |
217 | /* |
218 | * Access bit flags | |
219 | */ | |
220 | #define NFS_ACCESS_READ 0x0001 | |
221 | #define NFS_ACCESS_LOOKUP 0x0002 | |
222 | #define NFS_ACCESS_MODIFY 0x0004 | |
223 | #define NFS_ACCESS_EXTEND 0x0008 | |
224 | #define NFS_ACCESS_DELETE 0x0010 | |
225 | #define NFS_ACCESS_EXECUTE 0x0020 | |
9a67fcc8 FL |
226 | #define NFS_ACCESS_XAREAD 0x0040 |
227 | #define NFS_ACCESS_XAWRITE 0x0080 | |
228 | #define NFS_ACCESS_XALIST 0x0100 | |
3c181827 | 229 | |
1da177e4 | 230 | /* |
55296809 | 231 | * Cache validity bit flags |
1da177e4 | 232 | */ |
90972882 TM |
233 | #define NFS_INO_INVALID_DATA BIT(1) /* cached data is invalid */ |
234 | #define NFS_INO_INVALID_ATIME BIT(2) /* cached atime is invalid */ | |
235 | #define NFS_INO_INVALID_ACCESS BIT(3) /* cached access cred invalid */ | |
236 | #define NFS_INO_INVALID_ACL BIT(4) /* cached acls are invalid */ | |
237 | #define NFS_INO_REVAL_PAGECACHE BIT(5) /* must revalidate pagecache */ | |
238 | #define NFS_INO_REVAL_FORCED BIT(6) /* force revalidation ignoring a delegation */ | |
239 | #define NFS_INO_INVALID_LABEL BIT(7) /* cached label is invalid */ | |
16e14375 TM |
240 | #define NFS_INO_INVALID_CHANGE BIT(8) /* cached change is invalid */ |
241 | #define NFS_INO_INVALID_CTIME BIT(9) /* cached ctime is invalid */ | |
242 | #define NFS_INO_INVALID_MTIME BIT(10) /* cached mtime is invalid */ | |
243 | #define NFS_INO_INVALID_SIZE BIT(11) /* cached size is invalid */ | |
244 | #define NFS_INO_INVALID_OTHER BIT(12) /* other attrs are invalid */ | |
1c341b77 TM |
245 | #define NFS_INO_DATA_INVAL_DEFER \ |
246 | BIT(13) /* Deferred cache invalidation */ | |
3a39e778 | 247 | #define NFS_INO_INVALID_BLOCKS BIT(14) /* cached blocks are invalid */ |
0f44da51 | 248 | #define NFS_INO_INVALID_XATTR BIT(15) /* xattrs are invalid */ |
16e14375 TM |
249 | |
250 | #define NFS_INO_INVALID_ATTR (NFS_INO_INVALID_CHANGE \ | |
251 | | NFS_INO_INVALID_CTIME \ | |
252 | | NFS_INO_INVALID_MTIME \ | |
253 | | NFS_INO_INVALID_SIZE \ | |
254 | | NFS_INO_INVALID_OTHER) /* inode metadata is invalid */ | |
55296809 CL |
255 | |
256 | /* | |
412d582e | 257 | * Bit offsets in flags field |
55296809 | 258 | */ |
691beb13 TM |
259 | #define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */ |
260 | #define NFS_INO_STALE (1) /* possible stale inode */ | |
261 | #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ | |
d529ef83 | 262 | #define NFS_INO_INVALIDATING (3) /* inode is being invalidated */ |
ef79c097 DH |
263 | #define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ |
264 | #define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */ | |
863a3c6c | 265 | #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ |
92407e75 | 266 | #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ |
1bfe3b25 | 267 | #define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */ |
a5864c99 | 268 | #define NFS_INO_ODIRECT (12) /* I/O setting is O_DIRECT */ |
1da177e4 | 269 | |
99fadcd7 | 270 | static inline struct nfs_inode *NFS_I(const struct inode *inode) |
1da177e4 LT |
271 | { |
272 | return container_of(inode, struct nfs_inode, vfs_inode); | |
273 | } | |
99fadcd7 BH |
274 | |
275 | static inline struct nfs_server *NFS_SB(const struct super_block *s) | |
276 | { | |
277 | return (struct nfs_server *)(s->s_fs_info); | |
278 | } | |
279 | ||
280 | static inline struct nfs_fh *NFS_FH(const struct inode *inode) | |
281 | { | |
282 | return &NFS_I(inode)->fh; | |
283 | } | |
284 | ||
285 | static inline struct nfs_server *NFS_SERVER(const struct inode *inode) | |
286 | { | |
287 | return NFS_SB(inode->i_sb); | |
288 | } | |
289 | ||
290 | static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) | |
291 | { | |
292 | return NFS_SERVER(inode)->client; | |
293 | } | |
294 | ||
295 | static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) | |
296 | { | |
297 | return NFS_SERVER(inode)->nfs_client->rpc_ops; | |
298 | } | |
299 | ||
99fadcd7 BH |
300 | static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) |
301 | { | |
302 | struct nfs_server *nfss = NFS_SERVER(inode); | |
303 | return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; | |
304 | } | |
305 | ||
306 | static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) | |
307 | { | |
308 | struct nfs_server *nfss = NFS_SERVER(inode); | |
309 | return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; | |
310 | } | |
311 | ||
312 | static inline int NFS_STALE(const struct inode *inode) | |
313 | { | |
314 | return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); | |
315 | } | |
316 | ||
f1fe29b4 | 317 | static inline struct fscache_cookie *nfs_i_fscache(struct inode *inode) |
ef79c097 | 318 | { |
f1fe29b4 DH |
319 | #ifdef CONFIG_NFS_FSCACHE |
320 | return NFS_I(inode)->fscache; | |
321 | #else | |
322 | return NULL; | |
323 | #endif | |
ef79c097 DH |
324 | } |
325 | ||
99fadcd7 BH |
326 | static inline __u64 NFS_FILEID(const struct inode *inode) |
327 | { | |
328 | return NFS_I(inode)->fileid; | |
329 | } | |
330 | ||
331 | static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) | |
332 | { | |
333 | NFS_I(inode)->fileid = fileid; | |
334 | } | |
1da177e4 | 335 | |
decf491f TM |
336 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
337 | { | |
38478b24 TM |
338 | struct nfs_inode *nfsi = NFS_I(inode); |
339 | ||
decf491f | 340 | spin_lock(&inode->i_lock); |
16e14375 TM |
341 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE |
342 | | NFS_INO_INVALID_ACCESS | |
343 | | NFS_INO_INVALID_ACL | |
344 | | NFS_INO_INVALID_CHANGE | |
345 | | NFS_INO_INVALID_CTIME; | |
f3821110 | 346 | if (S_ISDIR(inode->i_mode)) |
115c48d7 | 347 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
decf491f TM |
348 | spin_unlock(&inode->i_lock); |
349 | } | |
350 | ||
1da177e4 LT |
351 | static inline int nfs_server_capable(struct inode *inode, int cap) |
352 | { | |
353 | return NFS_SERVER(inode)->caps & cap; | |
354 | } | |
355 | ||
1da177e4 LT |
356 | /** |
357 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
8edb0182 | 358 | * @dir - pointer to parent directory inode |
efeda80d TM |
359 | * The "cache change attribute" is updated when we need to revalidate |
360 | * our dentry cache after a directory was seen to change on the server. | |
1da177e4 | 361 | */ |
8edb0182 | 362 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
1da177e4 | 363 | { |
8edb0182 | 364 | return NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
365 | } |
366 | ||
1da177e4 LT |
367 | /* |
368 | * linux/fs/nfs/inode.c | |
369 | */ | |
29884df0 | 370 | extern int nfs_sync_mapping(struct address_space *mapping); |
cd9ae2b6 | 371 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 372 | extern void nfs_zap_caches(struct inode *); |
93ce4af7 | 373 | extern void nfs_set_inode_stale(struct inode *inode); |
c4812998 | 374 | extern void nfs_invalidate_atime(struct inode *); |
1da177e4 | 375 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
1775fd3e | 376 | struct nfs_fattr *, struct nfs4_label *); |
f174ff7a | 377 | struct inode *nfs_ilookup(struct super_block *sb, struct nfs_fattr *, struct nfs_fh *); |
1da177e4 | 378 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); |
decf491f | 379 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
70ca8852 | 380 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
a08a8cd3 | 381 | extern int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr); |
a528d35e | 382 | extern int nfs_getattr(const struct path *, struct kstat *, u32, unsigned int); |
6168f62c WAA |
383 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); |
384 | extern void nfs_access_set_mask(struct nfs_access_entry *, u32); | |
10556cb2 | 385 | extern int nfs_permission(struct inode *, int); |
1da177e4 | 386 | extern int nfs_open(struct inode *, struct file *); |
43f291cd | 387 | extern int nfs_attribute_cache_expired(struct inode *inode); |
1da177e4 LT |
388 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); |
389 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
1cd9cb05 | 390 | extern bool nfs_mapping_need_revalidate_inode(struct inode *inode); |
44b11874 | 391 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
0d0def49 | 392 | extern int nfs_revalidate_mapping_rcu(struct inode *inode); |
1da177e4 | 393 | extern int nfs_setattr(struct dentry *, struct iattr *); |
f044636d | 394 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, struct nfs_fattr *); |
aa9c2669 DQ |
395 | extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
396 | struct nfs4_label *label); | |
1da177e4 LT |
397 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
398 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
a52458b4 | 399 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode); |
532d4def | 400 | extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode, struct file *filp); |
c45ffdd2 | 401 | extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx); |
cd9a1c0e | 402 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); |
aff8d8dc | 403 | extern void nfs_file_clear_open_context(struct file *flip); |
f11ac8db TM |
404 | extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); |
405 | extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); | |
f43bf0be | 406 | extern u64 nfs_compat_user_ino64(u64 fileid); |
4704f0e2 | 407 | extern void nfs_fattr_init(struct nfs_fattr *fattr); |
140e049c | 408 | extern void nfs_fattr_set_barrier(struct nfs_fattr *fattr); |
56463e50 | 409 | extern unsigned long nfs_inc_attr_generation_counter(void); |
1da177e4 | 410 | |
2d36bfde TM |
411 | extern struct nfs_fattr *nfs_alloc_fattr(void); |
412 | ||
413 | static inline void nfs_free_fattr(const struct nfs_fattr *fattr) | |
414 | { | |
415 | kfree(fattr); | |
416 | } | |
417 | ||
418 | extern struct nfs_fh *nfs_alloc_fhandle(void); | |
419 | ||
420 | static inline void nfs_free_fhandle(const struct nfs_fh *fh) | |
421 | { | |
422 | kfree(fh); | |
423 | } | |
424 | ||
e27d359e | 425 | #ifdef NFS_DEBUG |
d8e0539e WAA |
426 | extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh); |
427 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
428 | { | |
429 | return _nfs_display_fhandle_hash(fh); | |
430 | } | |
20d27e92 CL |
431 | extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption); |
432 | #define nfs_display_fhandle(fh, caption) \ | |
433 | do { \ | |
434 | if (unlikely(nfs_debug & NFSDBG_FACILITY)) \ | |
435 | _nfs_display_fhandle(fh, caption); \ | |
436 | } while (0) | |
437 | #else | |
d8e0539e WAA |
438 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) |
439 | { | |
9304a812 | 440 | return 0; |
d8e0539e | 441 | } |
20d27e92 CL |
442 | static inline void nfs_display_fhandle(const struct nfs_fh *fh, |
443 | const char *caption) | |
444 | { | |
445 | } | |
446 | #endif | |
447 | ||
56463e50 CL |
448 | /* |
449 | * linux/fs/nfs/nfsroot.c | |
450 | */ | |
451 | extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ | |
1da177e4 | 452 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ |
5a874db4 | 453 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
0e574af1 | 454 | |
1da177e4 LT |
455 | /* |
456 | * linux/fs/nfs/file.c | |
457 | */ | |
4b6f5d20 | 458 | extern const struct file_operations nfs_file_operations; |
89d77c8f | 459 | #if IS_ENABLED(CONFIG_NFS_V4) |
1788ea6e JL |
460 | extern const struct file_operations nfs4_file_operations; |
461 | #endif /* CONFIG_NFS_V4 */ | |
f5e54d6e | 462 | extern const struct address_space_operations nfs_file_aops; |
11de3b11 | 463 | extern const struct address_space_operations nfs_dir_aops; |
1da177e4 | 464 | |
c03025d5 TM |
465 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
466 | { | |
467 | return filp->private_data; | |
468 | } | |
469 | ||
a52458b4 | 470 | static inline const struct cred *nfs_file_cred(struct file *file) |
1da177e4 | 471 | { |
504e5189 NB |
472 | if (file != NULL) { |
473 | struct nfs_open_context *ctx = | |
474 | nfs_file_open_context(file); | |
475 | if (ctx) | |
476 | return ctx->cred; | |
477 | } | |
1da177e4 LT |
478 | return NULL; |
479 | } | |
480 | ||
481 | /* | |
482 | * linux/fs/nfs/direct.c | |
483 | */ | |
c8b8e32d | 484 | extern ssize_t nfs_direct_IO(struct kiocb *, struct iov_iter *); |
027445c3 | 485 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, |
c8b8e32d | 486 | struct iov_iter *iter); |
027445c3 | 487 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, |
65a4a1ca | 488 | struct iov_iter *iter); |
1da177e4 LT |
489 | |
490 | /* | |
491 | * linux/fs/nfs/dir.c | |
492 | */ | |
4b6f5d20 | 493 | extern const struct file_operations nfs_dir_operations; |
f786aa90 | 494 | extern const struct dentry_operations nfs_dentry_operations; |
1da177e4 | 495 | |
bfc69a45 | 496 | extern void nfs_force_lookup_revalidate(struct inode *dir); |
efeda80d TM |
497 | extern void nfs_set_verifier(struct dentry * dentry, unsigned long verf); |
498 | #if IS_ENABLED(CONFIG_NFS_V4) | |
499 | extern void nfs_clear_verifier_delegated(struct inode *inode); | |
500 | #endif /* IS_ENABLED(CONFIG_NFS_V4) */ | |
406cd915 BC |
501 | extern struct dentry *nfs_add_or_obtain(struct dentry *dentry, |
502 | struct nfs_fh *fh, struct nfs_fattr *fattr, | |
503 | struct nfs4_label *label); | |
1775fd3e DQ |
504 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, |
505 | struct nfs_fattr *fattr, struct nfs4_label *label); | |
b68572e0 | 506 | extern int nfs_may_open(struct inode *inode, const struct cred *cred, int openflags); |
af22f94a | 507 | extern void nfs_access_zap_cache(struct inode *inode); |
d2ae4f8b FL |
508 | extern int nfs_access_get_cached(struct inode *inode, const struct cred *cred, struct nfs_access_entry *res, |
509 | bool may_block); | |
1da177e4 LT |
510 | |
511 | /* | |
512 | * linux/fs/nfs/symlink.c | |
513 | */ | |
c5ef1c42 | 514 | extern const struct inode_operations nfs_symlink_inode_operations; |
1da177e4 | 515 | |
a72b4422 TM |
516 | /* |
517 | * linux/fs/nfs/sysctl.c | |
518 | */ | |
519 | #ifdef CONFIG_SYSCTL | |
520 | extern int nfs_register_sysctl(void); | |
521 | extern void nfs_unregister_sysctl(void); | |
522 | #else | |
7fd105e7 | 523 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
524 | #define nfs_unregister_sysctl() do { } while(0) |
525 | #endif | |
526 | ||
55a97593 TM |
527 | /* |
528 | * linux/fs/nfs/namespace.c | |
529 | */ | |
c5ef1c42 AV |
530 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
531 | extern const struct inode_operations nfs_referral_inode_operations; | |
51d8fa6a TM |
532 | extern int nfs_mountpoint_expiry_timeout; |
533 | extern void nfs_release_automount_timer(void); | |
55a97593 | 534 | |
1da177e4 LT |
535 | /* |
536 | * linux/fs/nfs/unlink.c | |
537 | */ | |
e4eff1a6 | 538 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); |
1da177e4 LT |
539 | |
540 | /* | |
541 | * linux/fs/nfs/write.c | |
542 | */ | |
89a09141 | 543 | extern int nfs_congestion_kb; |
1da177e4 LT |
544 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
545 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
546 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
547 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
1da177e4 LT |
548 | |
549 | /* | |
550 | * Try to write back everything synchronously (but check the | |
551 | * return value!) | |
552 | */ | |
9e1681c2 | 553 | extern int nfs_sync_inode(struct inode *inode); |
1c75950b | 554 | extern int nfs_wb_all(struct inode *inode); |
c373fff7 | 555 | extern int nfs_wb_page(struct inode *inode, struct page *page); |
1b3b4a1a | 556 | extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); |
b608b283 | 557 | extern int nfs_commit_inode(struct inode *, int); |
518662e0 | 558 | extern struct nfs_commit_data *nfs_commitdata_alloc(bool never_fail); |
0b7c0153 | 559 | extern void nfs_commit_free(struct nfs_commit_data *data); |
1da177e4 LT |
560 | |
561 | static inline int | |
562 | nfs_have_writebacks(struct inode *inode) | |
563 | { | |
a6b6d5b8 | 564 | return atomic_long_read(&NFS_I(inode)->nrequests) != 0; |
1da177e4 LT |
565 | } |
566 | ||
1da177e4 LT |
567 | /* |
568 | * linux/fs/nfs/read.c | |
569 | */ | |
570 | extern int nfs_readpage(struct file *, struct page *); | |
571 | extern int nfs_readpages(struct file *, struct address_space *, | |
572 | struct list_head *, unsigned); | |
f42b293d DH |
573 | extern int nfs_readpage_async(struct nfs_open_context *, struct inode *, |
574 | struct page *); | |
963d8fe5 | 575 | |
1da177e4 LT |
576 | /* |
577 | * inline functions | |
578 | */ | |
579 | ||
433c9237 | 580 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
1da177e4 | 581 | { |
50ab8ec7 | 582 | return min_t(u64, size, OFFSET_MAX); |
1da177e4 LT |
583 | } |
584 | ||
585 | static inline ino_t | |
586 | nfs_fileid_to_ino_t(u64 fileid) | |
587 | { | |
588 | ino_t ino = (ino_t) fileid; | |
589 | if (sizeof(ino_t) < sizeof(u64)) | |
590 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
591 | return ino; | |
592 | } | |
593 | ||
1da177e4 LT |
594 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) |
595 | ||
4dc2eaec | 596 | |
1da177e4 LT |
597 | # undef ifdebug |
598 | # ifdef NFS_DEBUG | |
599 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
6f00866d | 600 | # define NFS_IFDEBUG(x) x |
1da177e4 LT |
601 | # else |
602 | # define ifdebug(fac) if (0) | |
6f00866d | 603 | # define NFS_IFDEBUG(x) |
1da177e4 | 604 | # endif |
1da177e4 | 605 | #endif |