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 | ||
88a4d7bd DW |
34 | #ifdef CONFIG_NFS_FSCACHE |
35 | #include <linux/netfs.h> | |
36 | #endif | |
37 | ||
7f1cbe51 DW |
38 | #include <linux/nfs.h> |
39 | #include <linux/nfs2.h> | |
40 | #include <linux/nfs3.h> | |
41 | #include <linux/nfs4.h> | |
42 | #include <linux/nfs_xdr.h> | |
7f1cbe51 DW |
43 | #include <linux/nfs_fs_sb.h> |
44 | ||
7f1cbe51 DW |
45 | #include <linux/mempool.h> |
46 | ||
7e134205 OK |
47 | /* |
48 | * These are the default for number of transports to different server IPs | |
49 | */ | |
50 | #define NFS_MAX_TRANSPORTS 16 | |
51 | ||
b593c09f TM |
52 | /* |
53 | * Size of the NFS directory verifier | |
54 | */ | |
55 | #define NFS_DIR_VERIFIER_SIZE 2 | |
56 | ||
1da177e4 LT |
57 | /* |
58 | * NFSv3/v4 Access mode cache entry | |
59 | */ | |
60 | struct nfs_access_entry { | |
1c3c07e9 | 61 | struct rb_node rb_node; |
cfcea3e8 | 62 | struct list_head lru; |
6238aec8 N |
63 | kuid_t fsuid; |
64 | kgid_t fsgid; | |
65 | struct group_info *group_info; | |
0eb43812 | 66 | u64 timestamp; |
bd8b2441 | 67 | __u32 mask; |
f682a398 | 68 | struct rcu_head rcu_head; |
1da177e4 LT |
69 | }; |
70 | ||
f11ac8db | 71 | struct nfs_lock_context { |
2f62b5aa | 72 | refcount_t count; |
f11ac8db TM |
73 | struct list_head list; |
74 | struct nfs_open_context *open_context; | |
d51fdb87 | 75 | fl_owner_t lockowner; |
210c7c17 | 76 | atomic_t io_count; |
1db97eaa | 77 | struct rcu_head rcu_head; |
f11ac8db TM |
78 | }; |
79 | ||
1da177e4 LT |
80 | struct nfs4_state; |
81 | struct nfs_open_context { | |
f11ac8db | 82 | struct nfs_lock_context lock_context; |
532d4def | 83 | fl_owner_t flock_owner; |
3d4ff43d | 84 | struct dentry *dentry; |
a52458b4 | 85 | const struct cred *cred; |
ca05cbae | 86 | struct rpc_cred __rcu *ll_cred; /* low-level cred - use to check for expiry */ |
1da177e4 | 87 | struct nfs4_state *state; |
dc0b027d | 88 | fmode_t mode; |
7b159fc1 TM |
89 | |
90 | unsigned long flags; | |
c58c8441 | 91 | #define NFS_CONTEXT_BAD (2) |
7d6ddf88 | 92 | #define NFS_CONTEXT_UNLOCK (3) |
e97bc663 | 93 | #define NFS_CONTEXT_FILE_OPEN (4) |
1da177e4 LT |
94 | int error; |
95 | ||
96 | struct list_head list; | |
82be417a | 97 | struct nfs4_threshold *mdsthreshold; |
0de43976 | 98 | struct rcu_head rcu_head; |
480c2006 | 99 | }; |
00a92642 | 100 | |
480c2006 | 101 | struct nfs_open_dir_context { |
311324ad | 102 | struct list_head list; |
230bc98f TM |
103 | atomic_t cache_hits; |
104 | atomic_t cache_misses; | |
0c030806 | 105 | unsigned long attr_gencount; |
b593c09f | 106 | __be32 verf[NFS_DIR_VERIFIER_SIZE]; |
00a92642 | 107 | __u64 dir_cookie; |
728dd0ab | 108 | __u64 last_cookie; |
ff81dfb5 | 109 | pgoff_t page_index; |
580f2367 | 110 | unsigned int dtsize; |
b0365ccb | 111 | bool force_clear; |
e1d2699b | 112 | bool eof; |
230bc98f | 113 | struct rcu_head rcu_head; |
1da177e4 LT |
114 | }; |
115 | ||
116 | /* | |
117 | * NFSv4 delegation | |
118 | */ | |
119 | struct nfs_delegation; | |
120 | ||
5c6a9f7d AG |
121 | struct posix_acl; |
122 | ||
95ad37f9 FL |
123 | struct nfs4_xattr_cache; |
124 | ||
1da177e4 LT |
125 | /* |
126 | * nfs fs inode data in memory | |
127 | */ | |
128 | struct nfs_inode { | |
129 | /* | |
130 | * The 64bit 'inode number' | |
131 | */ | |
132 | __u64 fileid; | |
133 | ||
134 | /* | |
135 | * NFS file handle | |
136 | */ | |
137 | struct nfs_fh fh; | |
138 | ||
139 | /* | |
140 | * Various flags | |
141 | */ | |
412d582e CL |
142 | unsigned long flags; /* atomic bit ops */ |
143 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
144 | |
145 | /* | |
24bd68f4 | 146 | * read_cache_jiffies is when we started read-caching this inode. |
1da177e4 LT |
147 | * attrtimeo is for how long the cached information is assumed |
148 | * to be valid. A successful attribute revalidation doubles | |
149 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
150 | * acregmin/acdirmin. | |
151 | * | |
152 | * We need to revalidate the cached attrs for this inode if | |
153 | * | |
64672d55 PS |
154 | * jiffies - read_cache_jiffies >= attrtimeo |
155 | * | |
156 | * Please note the comparison is greater than or equal | |
157 | * so that zero timeout values can be specified. | |
1da177e4 | 158 | */ |
1da177e4 LT |
159 | unsigned long read_cache_jiffies; |
160 | unsigned long attrtimeo; | |
161 | unsigned long attrtimeo_timestamp; | |
1da177e4 | 162 | |
4704f0e2 | 163 | unsigned long attr_gencount; |
1da177e4 | 164 | |
1c3c07e9 | 165 | struct rb_root access_cache; |
cfcea3e8 TM |
166 | struct list_head access_cache_entry_lru; |
167 | struct list_head access_cache_inode_lru; | |
1da177e4 | 168 | |
e591b298 TM |
169 | union { |
170 | /* Directory */ | |
171 | struct { | |
172 | /* "Generation counter" for the attribute cache. | |
173 | * This is bumped whenever we update the metadata | |
174 | * on the server. | |
175 | */ | |
176 | unsigned long cache_change_attribute; | |
177 | /* | |
178 | * This is the cookie verifier used for NFSv3 readdir | |
179 | * operations | |
180 | */ | |
181 | __be32 cookieverf[NFS_DIR_VERIFIER_SIZE]; | |
182 | /* Readers: in-flight sillydelete RPC calls */ | |
183 | /* Writers: rmdir */ | |
184 | struct rw_semaphore rmdir_sem; | |
185 | }; | |
186 | /* Regular file */ | |
187 | struct { | |
188 | atomic_long_t nrequests; | |
67f4b5dc | 189 | atomic_long_t redirtied_pages; |
e591b298 TM |
190 | struct nfs_mds_commit_info commit_info; |
191 | struct mutex commit_mutex; | |
192 | }; | |
193 | }; | |
1da177e4 LT |
194 | |
195 | /* Open contexts for shared mmap writes */ | |
196 | struct list_head open_files; | |
197 | ||
3db63daa N |
198 | /* Keep track of out-of-order replies. |
199 | * The ooo array contains start/end pairs of | |
200 | * numbers from the changeid sequence when | |
201 | * the inode's iversion has been updated. | |
202 | * It also contains end/start pair (i.e. reverse order) | |
203 | * of sections of the changeid sequence that have | |
204 | * been seen in replies from the server. | |
205 | * Normally these should match and when both | |
206 | * A:B and B:A are found in ooo, they are both removed. | |
207 | * And if a reply with A:B causes an iversion update | |
208 | * of A:B, then neither are added. | |
209 | * When a reply has pre_change that doesn't match | |
210 | * iversion, then the changeid pair and any consequent | |
211 | * change in iversion ARE added. Later replies | |
212 | * might fill in the gaps, or possibly a gap is caused | |
213 | * by a change from another client. | |
214 | * When a file or directory is opened, if the ooo table | |
215 | * is not empty, then we assume the gaps were due to | |
216 | * another client and we invalidate the cached data. | |
217 | * | |
218 | * We can only track a limited number of concurrent gaps. | |
219 | * Currently that limit is 16. | |
220 | * We allocate the table on demand. If there is insufficient | |
221 | * memory, then we probably cannot cache the file anyway | |
222 | * so there is no loss. | |
223 | */ | |
224 | struct { | |
225 | int cnt; | |
226 | struct { | |
227 | u64 start, end; | |
228 | } gap[16]; | |
229 | } *ooo; | |
230 | ||
89d77c8f | 231 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e | 232 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
233 | /* NFSv4 state */ |
234 | struct list_head open_states; | |
5b22216e | 235 | struct nfs_delegation __rcu *delegation; |
1da177e4 | 236 | struct rw_semaphore rwsem; |
e5e94017 BH |
237 | |
238 | /* pNFS layout information */ | |
239 | struct pnfs_layout_hdr *layout; | |
1da177e4 | 240 | #endif /* CONFIG_NFS_V4*/ |
2701d086 AA |
241 | /* how many bytes have been written/read and how many bytes queued up */ |
242 | __u64 write_io; | |
243 | __u64 read_io; | |
95ad37f9 FL |
244 | #ifdef CONFIG_NFS_V4_2 |
245 | struct nfs4_xattr_cache *xattr_cache; | |
246 | #endif | |
88a4d7bd DW |
247 | union { |
248 | struct inode vfs_inode; | |
249 | #ifdef CONFIG_NFS_FSCACHE | |
250 | struct netfs_inode netfs; /* netfs context and VFS inode */ | |
251 | #endif | |
252 | }; | |
1da177e4 LT |
253 | }; |
254 | ||
62164f31 OK |
255 | struct nfs4_copy_state { |
256 | struct list_head copies; | |
0e65a32c | 257 | struct list_head src_copies; |
62164f31 OK |
258 | nfs4_stateid stateid; |
259 | struct completion completion; | |
260 | uint64_t count; | |
261 | struct nfs_writeverf verf; | |
262 | int error; | |
e4648aa4 | 263 | int flags; |
0e65a32c OK |
264 | struct nfs4_state *parent_src_state; |
265 | struct nfs4_state *parent_dst_state; | |
62164f31 OK |
266 | }; |
267 | ||
3c181827 AS |
268 | /* |
269 | * Access bit flags | |
270 | */ | |
271 | #define NFS_ACCESS_READ 0x0001 | |
272 | #define NFS_ACCESS_LOOKUP 0x0002 | |
273 | #define NFS_ACCESS_MODIFY 0x0004 | |
274 | #define NFS_ACCESS_EXTEND 0x0008 | |
275 | #define NFS_ACCESS_DELETE 0x0010 | |
276 | #define NFS_ACCESS_EXECUTE 0x0020 | |
9a67fcc8 FL |
277 | #define NFS_ACCESS_XAREAD 0x0040 |
278 | #define NFS_ACCESS_XAWRITE 0x0080 | |
279 | #define NFS_ACCESS_XALIST 0x0100 | |
3c181827 | 280 | |
1da177e4 | 281 | /* |
55296809 | 282 | * Cache validity bit flags |
1da177e4 | 283 | */ |
90972882 TM |
284 | #define NFS_INO_INVALID_DATA BIT(1) /* cached data is invalid */ |
285 | #define NFS_INO_INVALID_ATIME BIT(2) /* cached atime is invalid */ | |
286 | #define NFS_INO_INVALID_ACCESS BIT(3) /* cached access cred invalid */ | |
287 | #define NFS_INO_INVALID_ACL BIT(4) /* cached acls are invalid */ | |
90972882 TM |
288 | #define NFS_INO_REVAL_FORCED BIT(6) /* force revalidation ignoring a delegation */ |
289 | #define NFS_INO_INVALID_LABEL BIT(7) /* cached label is invalid */ | |
16e14375 TM |
290 | #define NFS_INO_INVALID_CHANGE BIT(8) /* cached change is invalid */ |
291 | #define NFS_INO_INVALID_CTIME BIT(9) /* cached ctime is invalid */ | |
292 | #define NFS_INO_INVALID_MTIME BIT(10) /* cached mtime is invalid */ | |
293 | #define NFS_INO_INVALID_SIZE BIT(11) /* cached size is invalid */ | |
294 | #define NFS_INO_INVALID_OTHER BIT(12) /* other attrs are invalid */ | |
1c341b77 TM |
295 | #define NFS_INO_DATA_INVAL_DEFER \ |
296 | BIT(13) /* Deferred cache invalidation */ | |
3a39e778 | 297 | #define NFS_INO_INVALID_BLOCKS BIT(14) /* cached blocks are invalid */ |
0f44da51 | 298 | #define NFS_INO_INVALID_XATTR BIT(15) /* xattrs are invalid */ |
fabf2b34 | 299 | #define NFS_INO_INVALID_NLINK BIT(16) /* cached nlinks is invalid */ |
720869eb | 300 | #define NFS_INO_INVALID_MODE BIT(17) /* cached mode is invalid */ |
16e14375 TM |
301 | |
302 | #define NFS_INO_INVALID_ATTR (NFS_INO_INVALID_CHANGE \ | |
303 | | NFS_INO_INVALID_CTIME \ | |
304 | | NFS_INO_INVALID_MTIME \ | |
305 | | NFS_INO_INVALID_SIZE \ | |
fabf2b34 | 306 | | NFS_INO_INVALID_NLINK \ |
720869eb | 307 | | NFS_INO_INVALID_MODE \ |
16e14375 | 308 | | NFS_INO_INVALID_OTHER) /* inode metadata is invalid */ |
55296809 CL |
309 | |
310 | /* | |
412d582e | 311 | * Bit offsets in flags field |
55296809 | 312 | */ |
691beb13 TM |
313 | #define NFS_INO_STALE (1) /* possible stale inode */ |
314 | #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ | |
d529ef83 | 315 | #define NFS_INO_INVALIDATING (3) /* inode is being invalidated */ |
43245eca | 316 | #define NFS_INO_PRESERVE_UNLINKED (4) /* preserve file if removed while open */ |
863a3c6c | 317 | #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ |
92407e75 | 318 | #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ |
1bfe3b25 | 319 | #define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */ |
a5864c99 | 320 | #define NFS_INO_ODIRECT (12) /* I/O setting is O_DIRECT */ |
1da177e4 | 321 | |
99fadcd7 | 322 | static inline struct nfs_inode *NFS_I(const struct inode *inode) |
1da177e4 LT |
323 | { |
324 | return container_of(inode, struct nfs_inode, vfs_inode); | |
325 | } | |
99fadcd7 BH |
326 | |
327 | static inline struct nfs_server *NFS_SB(const struct super_block *s) | |
328 | { | |
329 | return (struct nfs_server *)(s->s_fs_info); | |
330 | } | |
331 | ||
332 | static inline struct nfs_fh *NFS_FH(const struct inode *inode) | |
333 | { | |
334 | return &NFS_I(inode)->fh; | |
335 | } | |
336 | ||
337 | static inline struct nfs_server *NFS_SERVER(const struct inode *inode) | |
338 | { | |
339 | return NFS_SB(inode->i_sb); | |
340 | } | |
341 | ||
342 | static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) | |
343 | { | |
344 | return NFS_SERVER(inode)->client; | |
345 | } | |
346 | ||
347 | static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) | |
348 | { | |
349 | return NFS_SERVER(inode)->nfs_client->rpc_ops; | |
350 | } | |
351 | ||
99fadcd7 BH |
352 | static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) |
353 | { | |
354 | struct nfs_server *nfss = NFS_SERVER(inode); | |
355 | return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; | |
356 | } | |
357 | ||
358 | static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) | |
359 | { | |
360 | struct nfs_server *nfss = NFS_SERVER(inode); | |
361 | return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; | |
362 | } | |
363 | ||
364 | static inline int NFS_STALE(const struct inode *inode) | |
365 | { | |
366 | return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); | |
367 | } | |
368 | ||
369 | static inline __u64 NFS_FILEID(const struct inode *inode) | |
370 | { | |
371 | return NFS_I(inode)->fileid; | |
372 | } | |
373 | ||
374 | static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) | |
375 | { | |
376 | NFS_I(inode)->fileid = fileid; | |
377 | } | |
1da177e4 | 378 | |
decf491f TM |
379 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
380 | { | |
38478b24 TM |
381 | struct nfs_inode *nfsi = NFS_I(inode); |
382 | ||
decf491f | 383 | spin_lock(&inode->i_lock); |
88a6099f TM |
384 | nfsi->cache_validity |= NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | |
385 | NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME | | |
386 | NFS_INO_INVALID_SIZE; | |
f3821110 | 387 | if (S_ISDIR(inode->i_mode)) |
115c48d7 | 388 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
decf491f TM |
389 | spin_unlock(&inode->i_lock); |
390 | } | |
391 | ||
1a93b82c | 392 | static inline int nfs_server_capable(const struct inode *inode, int cap) |
1da177e4 LT |
393 | { |
394 | return NFS_SERVER(inode)->caps & cap; | |
395 | } | |
396 | ||
1da177e4 LT |
397 | /** |
398 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
8edb0182 | 399 | * @dir - pointer to parent directory inode |
efeda80d TM |
400 | * The "cache change attribute" is updated when we need to revalidate |
401 | * our dentry cache after a directory was seen to change on the server. | |
1da177e4 | 402 | */ |
8edb0182 | 403 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
1da177e4 | 404 | { |
8edb0182 | 405 | return NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
406 | } |
407 | ||
1da177e4 LT |
408 | /* |
409 | * linux/fs/nfs/inode.c | |
410 | */ | |
29884df0 | 411 | extern int nfs_sync_mapping(struct address_space *mapping); |
cd9ae2b6 | 412 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 413 | extern void nfs_zap_caches(struct inode *); |
93ce4af7 | 414 | extern void nfs_set_inode_stale(struct inode *inode); |
c4812998 | 415 | extern void nfs_invalidate_atime(struct inode *); |
1da177e4 | 416 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
cf7ab00a | 417 | struct nfs_fattr *); |
f174ff7a | 418 | struct inode *nfs_ilookup(struct super_block *sb, struct nfs_fattr *, struct nfs_fh *); |
1da177e4 | 419 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); |
decf491f | 420 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
70ca8852 | 421 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
a08a8cd3 | 422 | extern int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr); |
b74d24f7 | 423 | extern int nfs_getattr(struct mnt_idmap *, const struct path *, |
549c7297 | 424 | struct kstat *, u32, unsigned int); |
73fbb3fa | 425 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *, const struct cred *); |
6168f62c | 426 | extern void nfs_access_set_mask(struct nfs_access_entry *, u32); |
4609e1f1 | 427 | extern int nfs_permission(struct mnt_idmap *, struct inode *, int); |
1da177e4 | 428 | extern int nfs_open(struct inode *, struct file *); |
43f291cd | 429 | extern int nfs_attribute_cache_expired(struct inode *inode); |
1f3208b2 | 430 | extern int nfs_revalidate_inode(struct inode *inode, unsigned long flags); |
1da177e4 | 431 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); |
28aa2f9e | 432 | extern int nfs_clear_invalid_mapping(struct address_space *mapping); |
1cd9cb05 | 433 | extern bool nfs_mapping_need_revalidate_inode(struct inode *inode); |
44b11874 | 434 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
0d0def49 | 435 | extern int nfs_revalidate_mapping_rcu(struct inode *inode); |
c1632a0f | 436 | extern int nfs_setattr(struct mnt_idmap *, struct dentry *, struct iattr *); |
f044636d | 437 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, struct nfs_fattr *); |
dd225cb3 | 438 | extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr); |
1da177e4 LT |
439 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
440 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
a52458b4 | 441 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode); |
532d4def | 442 | extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode, struct file *filp); |
c45ffdd2 | 443 | extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx); |
cd9a1c0e | 444 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); |
aff8d8dc | 445 | extern void nfs_file_clear_open_context(struct file *flip); |
f11ac8db TM |
446 | extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); |
447 | extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); | |
f43bf0be | 448 | extern u64 nfs_compat_user_ino64(u64 fileid); |
4704f0e2 | 449 | extern void nfs_fattr_init(struct nfs_fattr *fattr); |
140e049c | 450 | extern void nfs_fattr_set_barrier(struct nfs_fattr *fattr); |
56463e50 | 451 | extern unsigned long nfs_inc_attr_generation_counter(void); |
1da177e4 | 452 | |
2d36bfde | 453 | extern struct nfs_fattr *nfs_alloc_fattr(void); |
d755ad8d AS |
454 | extern struct nfs_fattr *nfs_alloc_fattr_with_label(struct nfs_server *server); |
455 | ||
456 | static inline void nfs4_label_free(struct nfs4_label *label) | |
457 | { | |
458 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL | |
459 | if (label) { | |
460 | kfree(label->label); | |
461 | kfree(label); | |
462 | } | |
463 | #endif | |
464 | } | |
2d36bfde TM |
465 | |
466 | static inline void nfs_free_fattr(const struct nfs_fattr *fattr) | |
467 | { | |
d755ad8d AS |
468 | if (fattr) |
469 | nfs4_label_free(fattr->label); | |
2d36bfde TM |
470 | kfree(fattr); |
471 | } | |
472 | ||
473 | extern struct nfs_fh *nfs_alloc_fhandle(void); | |
474 | ||
475 | static inline void nfs_free_fhandle(const struct nfs_fh *fh) | |
476 | { | |
477 | kfree(fh); | |
478 | } | |
479 | ||
e27d359e | 480 | #ifdef NFS_DEBUG |
d8e0539e WAA |
481 | extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh); |
482 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
483 | { | |
484 | return _nfs_display_fhandle_hash(fh); | |
485 | } | |
20d27e92 CL |
486 | extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption); |
487 | #define nfs_display_fhandle(fh, caption) \ | |
488 | do { \ | |
489 | if (unlikely(nfs_debug & NFSDBG_FACILITY)) \ | |
490 | _nfs_display_fhandle(fh, caption); \ | |
491 | } while (0) | |
492 | #else | |
d8e0539e WAA |
493 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) |
494 | { | |
9304a812 | 495 | return 0; |
d8e0539e | 496 | } |
20d27e92 CL |
497 | static inline void nfs_display_fhandle(const struct nfs_fh *fh, |
498 | const char *caption) | |
499 | { | |
500 | } | |
501 | #endif | |
502 | ||
56463e50 CL |
503 | /* |
504 | * linux/fs/nfs/nfsroot.c | |
505 | */ | |
506 | extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ | |
1da177e4 | 507 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ |
5a874db4 | 508 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
0e574af1 | 509 | |
1da177e4 LT |
510 | /* |
511 | * linux/fs/nfs/file.c | |
512 | */ | |
4b6f5d20 | 513 | extern const struct file_operations nfs_file_operations; |
89d77c8f | 514 | #if IS_ENABLED(CONFIG_NFS_V4) |
1788ea6e JL |
515 | extern const struct file_operations nfs4_file_operations; |
516 | #endif /* CONFIG_NFS_V4 */ | |
f5e54d6e | 517 | extern const struct address_space_operations nfs_file_aops; |
11de3b11 | 518 | extern const struct address_space_operations nfs_dir_aops; |
1da177e4 | 519 | |
c03025d5 TM |
520 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
521 | { | |
522 | return filp->private_data; | |
523 | } | |
524 | ||
a52458b4 | 525 | static inline const struct cred *nfs_file_cred(struct file *file) |
1da177e4 | 526 | { |
504e5189 NB |
527 | if (file != NULL) { |
528 | struct nfs_open_context *ctx = | |
529 | nfs_file_open_context(file); | |
530 | if (ctx) | |
531 | return ctx->cred; | |
532 | } | |
1da177e4 LT |
533 | return NULL; |
534 | } | |
535 | ||
536 | /* | |
537 | * linux/fs/nfs/direct.c | |
538 | */ | |
eb79f3af | 539 | int nfs_swap_rw(struct kiocb *iocb, struct iov_iter *iter); |
64158668 N |
540 | ssize_t nfs_file_direct_read(struct kiocb *iocb, |
541 | struct iov_iter *iter, bool swap); | |
542 | ssize_t nfs_file_direct_write(struct kiocb *iocb, | |
543 | struct iov_iter *iter, bool swap); | |
1da177e4 LT |
544 | |
545 | /* | |
546 | * linux/fs/nfs/dir.c | |
547 | */ | |
4b6f5d20 | 548 | extern const struct file_operations nfs_dir_operations; |
f786aa90 | 549 | extern const struct dentry_operations nfs_dentry_operations; |
1da177e4 | 550 | |
bfc69a45 | 551 | extern void nfs_force_lookup_revalidate(struct inode *dir); |
efeda80d TM |
552 | extern void nfs_set_verifier(struct dentry * dentry, unsigned long verf); |
553 | #if IS_ENABLED(CONFIG_NFS_V4) | |
554 | extern void nfs_clear_verifier_delegated(struct inode *inode); | |
555 | #endif /* IS_ENABLED(CONFIG_NFS_V4) */ | |
406cd915 | 556 | extern struct dentry *nfs_add_or_obtain(struct dentry *dentry, |
cc6f3298 | 557 | struct nfs_fh *fh, struct nfs_fattr *fattr); |
1775fd3e | 558 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, |
d91bfc46 | 559 | struct nfs_fattr *fattr); |
b68572e0 | 560 | extern int nfs_may_open(struct inode *inode, const struct cred *cred, int openflags); |
af22f94a | 561 | extern void nfs_access_zap_cache(struct inode *inode); |
b5e7b59c N |
562 | extern int nfs_access_get_cached(struct inode *inode, const struct cred *cred, |
563 | u32 *mask, bool may_block); | |
7c6c5249 N |
564 | extern int nfs_atomic_open_v23(struct inode *dir, struct dentry *dentry, |
565 | struct file *file, unsigned int open_flags, | |
566 | umode_t mode); | |
1da177e4 LT |
567 | |
568 | /* | |
569 | * linux/fs/nfs/symlink.c | |
570 | */ | |
c5ef1c42 | 571 | extern const struct inode_operations nfs_symlink_inode_operations; |
1da177e4 | 572 | |
a72b4422 TM |
573 | /* |
574 | * linux/fs/nfs/sysctl.c | |
575 | */ | |
576 | #ifdef CONFIG_SYSCTL | |
577 | extern int nfs_register_sysctl(void); | |
578 | extern void nfs_unregister_sysctl(void); | |
579 | #else | |
7fd105e7 | 580 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
581 | #define nfs_unregister_sysctl() do { } while(0) |
582 | #endif | |
583 | ||
55a97593 TM |
584 | /* |
585 | * linux/fs/nfs/namespace.c | |
586 | */ | |
c5ef1c42 AV |
587 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
588 | extern const struct inode_operations nfs_referral_inode_operations; | |
51d8fa6a TM |
589 | extern int nfs_mountpoint_expiry_timeout; |
590 | extern void nfs_release_automount_timer(void); | |
55a97593 | 591 | |
1da177e4 LT |
592 | /* |
593 | * linux/fs/nfs/unlink.c | |
594 | */ | |
e4eff1a6 | 595 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); |
1da177e4 LT |
596 | |
597 | /* | |
598 | * linux/fs/nfs/write.c | |
599 | */ | |
89a09141 | 600 | extern int nfs_congestion_kb; |
1da177e4 | 601 | extern int nfs_writepages(struct address_space *, struct writeback_control *); |
0c493b5c TM |
602 | extern int nfs_flush_incompatible(struct file *file, struct folio *folio); |
603 | extern int nfs_update_folio(struct file *file, struct folio *folio, | |
604 | unsigned int offset, unsigned int count); | |
1da177e4 LT |
605 | |
606 | /* | |
607 | * Try to write back everything synchronously (but check the | |
608 | * return value!) | |
609 | */ | |
9e1681c2 | 610 | extern int nfs_sync_inode(struct inode *inode); |
1c75950b | 611 | extern int nfs_wb_all(struct inode *inode); |
4b27232a | 612 | extern int nfs_wb_folio(struct inode *inode, struct folio *folio); |
6d740c76 | 613 | int nfs_wb_folio_cancel(struct inode *inode, struct folio *folio); |
b608b283 | 614 | extern int nfs_commit_inode(struct inode *, int); |
515dcdcd | 615 | extern struct nfs_commit_data *nfs_commitdata_alloc(void); |
0b7c0153 | 616 | extern void nfs_commit_free(struct nfs_commit_data *data); |
17f46b80 | 617 | void nfs_commit_begin(struct nfs_mds_commit_info *cinfo); |
133a48ab | 618 | bool nfs_commit_end(struct nfs_mds_commit_info *cinfo); |
1da177e4 | 619 | |
1a93b82c | 620 | static inline bool nfs_have_writebacks(const struct inode *inode) |
1da177e4 | 621 | { |
0ebeebcf DW |
622 | if (S_ISREG(inode->i_mode)) |
623 | return atomic_long_read(&NFS_I(inode)->nrequests) != 0; | |
1a93b82c | 624 | return false; |
1da177e4 LT |
625 | } |
626 | ||
1da177e4 LT |
627 | /* |
628 | * linux/fs/nfs/read.c | |
629 | */ | |
65d023af | 630 | int nfs_read_folio(struct file *, struct folio *); |
8786fde8 | 631 | void nfs_readahead(struct readahead_control *); |
963d8fe5 | 632 | |
1da177e4 LT |
633 | /* |
634 | * inline functions | |
635 | */ | |
636 | ||
433c9237 | 637 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
1da177e4 | 638 | { |
50ab8ec7 | 639 | return min_t(u64, size, OFFSET_MAX); |
1da177e4 LT |
640 | } |
641 | ||
642 | static inline ino_t | |
643 | nfs_fileid_to_ino_t(u64 fileid) | |
644 | { | |
645 | ino_t ino = (ino_t) fileid; | |
646 | if (sizeof(ino_t) < sizeof(u64)) | |
647 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
648 | return ino; | |
649 | } | |
650 | ||
3db63daa N |
651 | static inline void nfs_ooo_clear(struct nfs_inode *nfsi) |
652 | { | |
653 | nfsi->cache_validity &= ~NFS_INO_DATA_INVAL_DEFER; | |
654 | kfree(nfsi->ooo); | |
655 | nfsi->ooo = NULL; | |
656 | } | |
657 | ||
658 | static inline bool nfs_ooo_test(struct nfs_inode *nfsi) | |
659 | { | |
660 | return (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER) || | |
661 | (nfsi->ooo && nfsi->ooo->cnt > 0); | |
662 | ||
663 | } | |
664 | ||
1da177e4 LT |
665 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) |
666 | ||
3c59366c N |
667 | /* We need to block new opens while a file is being unlinked. |
668 | * If it is opened *before* we decide to unlink, we will silly-rename | |
669 | * instead. If it is opened *after*, then we need to create or will fail. | |
670 | * If we allow the two to race, we could end up with a file that is open | |
671 | * but deleted on the server resulting in ESTALE. | |
672 | * So use ->d_fsdata to record when the unlink is happening | |
673 | * and block dentry revalidation while it is set. | |
674 | */ | |
675 | #define NFS_FSDATA_BLOCKED ((void*)1) | |
4dc2eaec | 676 | |
1da177e4 LT |
677 | # undef ifdebug |
678 | # ifdef NFS_DEBUG | |
679 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
6f00866d | 680 | # define NFS_IFDEBUG(x) x |
1da177e4 LT |
681 | # else |
682 | # define ifdebug(fac) if (0) | |
6f00866d | 683 | # define NFS_IFDEBUG(x) |
1da177e4 | 684 | # endif |
1da177e4 | 685 | #endif |