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 | ||
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; |
6238aec8 N |
59 | kuid_t fsuid; |
60 | kgid_t fsgid; | |
61 | struct group_info *group_info; | |
0eb43812 | 62 | u64 timestamp; |
bd8b2441 | 63 | __u32 mask; |
f682a398 | 64 | struct rcu_head rcu_head; |
1da177e4 LT |
65 | }; |
66 | ||
f11ac8db | 67 | struct nfs_lock_context { |
2f62b5aa | 68 | refcount_t count; |
f11ac8db TM |
69 | struct list_head list; |
70 | struct nfs_open_context *open_context; | |
d51fdb87 | 71 | fl_owner_t lockowner; |
210c7c17 | 72 | atomic_t io_count; |
1db97eaa | 73 | struct rcu_head rcu_head; |
f11ac8db TM |
74 | }; |
75 | ||
1da177e4 LT |
76 | struct nfs4_state; |
77 | struct nfs_open_context { | |
f11ac8db | 78 | struct nfs_lock_context lock_context; |
532d4def | 79 | fl_owner_t flock_owner; |
3d4ff43d | 80 | struct dentry *dentry; |
a52458b4 | 81 | const struct cred *cred; |
ca05cbae | 82 | struct rpc_cred __rcu *ll_cred; /* low-level cred - use to check for expiry */ |
1da177e4 | 83 | struct nfs4_state *state; |
dc0b027d | 84 | fmode_t mode; |
7b159fc1 TM |
85 | |
86 | unsigned long flags; | |
c58c8441 | 87 | #define NFS_CONTEXT_BAD (2) |
7d6ddf88 | 88 | #define NFS_CONTEXT_UNLOCK (3) |
e97bc663 | 89 | #define NFS_CONTEXT_FILE_OPEN (4) |
1da177e4 LT |
90 | int error; |
91 | ||
92 | struct list_head list; | |
82be417a | 93 | struct nfs4_threshold *mdsthreshold; |
0de43976 | 94 | struct rcu_head rcu_head; |
480c2006 | 95 | }; |
00a92642 | 96 | |
480c2006 | 97 | struct nfs_open_dir_context { |
311324ad | 98 | struct list_head list; |
230bc98f TM |
99 | atomic_t cache_hits; |
100 | atomic_t cache_misses; | |
0c030806 | 101 | unsigned long attr_gencount; |
b593c09f | 102 | __be32 verf[NFS_DIR_VERIFIER_SIZE]; |
00a92642 | 103 | __u64 dir_cookie; |
728dd0ab | 104 | __u64 last_cookie; |
ff81dfb5 | 105 | pgoff_t page_index; |
580f2367 | 106 | unsigned int dtsize; |
b0365ccb | 107 | bool force_clear; |
e1d2699b | 108 | bool eof; |
230bc98f | 109 | struct rcu_head rcu_head; |
1da177e4 LT |
110 | }; |
111 | ||
112 | /* | |
113 | * NFSv4 delegation | |
114 | */ | |
115 | struct nfs_delegation; | |
116 | ||
5c6a9f7d AG |
117 | struct posix_acl; |
118 | ||
95ad37f9 FL |
119 | struct nfs4_xattr_cache; |
120 | ||
1da177e4 LT |
121 | /* |
122 | * nfs fs inode data in memory | |
123 | */ | |
124 | struct nfs_inode { | |
125 | /* | |
126 | * The 64bit 'inode number' | |
127 | */ | |
128 | __u64 fileid; | |
129 | ||
130 | /* | |
131 | * NFS file handle | |
132 | */ | |
133 | struct nfs_fh fh; | |
134 | ||
135 | /* | |
136 | * Various flags | |
137 | */ | |
412d582e CL |
138 | unsigned long flags; /* atomic bit ops */ |
139 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
140 | |
141 | /* | |
24bd68f4 | 142 | * read_cache_jiffies is when we started read-caching this inode. |
1da177e4 LT |
143 | * attrtimeo is for how long the cached information is assumed |
144 | * to be valid. A successful attribute revalidation doubles | |
145 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
146 | * acregmin/acdirmin. | |
147 | * | |
148 | * We need to revalidate the cached attrs for this inode if | |
149 | * | |
64672d55 PS |
150 | * jiffies - read_cache_jiffies >= attrtimeo |
151 | * | |
152 | * Please note the comparison is greater than or equal | |
153 | * so that zero timeout values can be specified. | |
1da177e4 | 154 | */ |
1da177e4 LT |
155 | unsigned long read_cache_jiffies; |
156 | unsigned long attrtimeo; | |
157 | unsigned long attrtimeo_timestamp; | |
1da177e4 | 158 | |
4704f0e2 | 159 | unsigned long attr_gencount; |
1da177e4 | 160 | |
1c3c07e9 | 161 | struct rb_root access_cache; |
cfcea3e8 TM |
162 | struct list_head access_cache_entry_lru; |
163 | struct list_head access_cache_inode_lru; | |
1da177e4 | 164 | |
e591b298 TM |
165 | union { |
166 | /* Directory */ | |
167 | struct { | |
168 | /* "Generation counter" for the attribute cache. | |
169 | * This is bumped whenever we update the metadata | |
170 | * on the server. | |
171 | */ | |
172 | unsigned long cache_change_attribute; | |
173 | /* | |
174 | * This is the cookie verifier used for NFSv3 readdir | |
175 | * operations | |
176 | */ | |
177 | __be32 cookieverf[NFS_DIR_VERIFIER_SIZE]; | |
178 | /* Readers: in-flight sillydelete RPC calls */ | |
179 | /* Writers: rmdir */ | |
180 | struct rw_semaphore rmdir_sem; | |
181 | }; | |
182 | /* Regular file */ | |
183 | struct { | |
184 | atomic_long_t nrequests; | |
67f4b5dc | 185 | atomic_long_t redirtied_pages; |
e591b298 TM |
186 | struct nfs_mds_commit_info commit_info; |
187 | struct mutex commit_mutex; | |
188 | }; | |
189 | }; | |
1da177e4 LT |
190 | |
191 | /* Open contexts for shared mmap writes */ | |
192 | struct list_head open_files; | |
193 | ||
89d77c8f | 194 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e | 195 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
196 | /* NFSv4 state */ |
197 | struct list_head open_states; | |
5b22216e | 198 | struct nfs_delegation __rcu *delegation; |
1da177e4 | 199 | struct rw_semaphore rwsem; |
e5e94017 BH |
200 | |
201 | /* pNFS layout information */ | |
202 | struct pnfs_layout_hdr *layout; | |
1da177e4 | 203 | #endif /* CONFIG_NFS_V4*/ |
2701d086 AA |
204 | /* how many bytes have been written/read and how many bytes queued up */ |
205 | __u64 write_io; | |
206 | __u64 read_io; | |
ef79c097 DH |
207 | #ifdef CONFIG_NFS_FSCACHE |
208 | struct fscache_cookie *fscache; | |
209 | #endif | |
1da177e4 | 210 | struct inode vfs_inode; |
95ad37f9 FL |
211 | |
212 | #ifdef CONFIG_NFS_V4_2 | |
213 | struct nfs4_xattr_cache *xattr_cache; | |
214 | #endif | |
1da177e4 LT |
215 | }; |
216 | ||
62164f31 OK |
217 | struct nfs4_copy_state { |
218 | struct list_head copies; | |
0e65a32c | 219 | struct list_head src_copies; |
62164f31 OK |
220 | nfs4_stateid stateid; |
221 | struct completion completion; | |
222 | uint64_t count; | |
223 | struct nfs_writeverf verf; | |
224 | int error; | |
e4648aa4 | 225 | int flags; |
0e65a32c OK |
226 | struct nfs4_state *parent_src_state; |
227 | struct nfs4_state *parent_dst_state; | |
62164f31 OK |
228 | }; |
229 | ||
3c181827 AS |
230 | /* |
231 | * Access bit flags | |
232 | */ | |
233 | #define NFS_ACCESS_READ 0x0001 | |
234 | #define NFS_ACCESS_LOOKUP 0x0002 | |
235 | #define NFS_ACCESS_MODIFY 0x0004 | |
236 | #define NFS_ACCESS_EXTEND 0x0008 | |
237 | #define NFS_ACCESS_DELETE 0x0010 | |
238 | #define NFS_ACCESS_EXECUTE 0x0020 | |
9a67fcc8 FL |
239 | #define NFS_ACCESS_XAREAD 0x0040 |
240 | #define NFS_ACCESS_XAWRITE 0x0080 | |
241 | #define NFS_ACCESS_XALIST 0x0100 | |
3c181827 | 242 | |
1da177e4 | 243 | /* |
55296809 | 244 | * Cache validity bit flags |
1da177e4 | 245 | */ |
90972882 TM |
246 | #define NFS_INO_INVALID_DATA BIT(1) /* cached data is invalid */ |
247 | #define NFS_INO_INVALID_ATIME BIT(2) /* cached atime is invalid */ | |
248 | #define NFS_INO_INVALID_ACCESS BIT(3) /* cached access cred invalid */ | |
249 | #define NFS_INO_INVALID_ACL BIT(4) /* cached acls are invalid */ | |
90972882 TM |
250 | #define NFS_INO_REVAL_FORCED BIT(6) /* force revalidation ignoring a delegation */ |
251 | #define NFS_INO_INVALID_LABEL BIT(7) /* cached label is invalid */ | |
16e14375 TM |
252 | #define NFS_INO_INVALID_CHANGE BIT(8) /* cached change is invalid */ |
253 | #define NFS_INO_INVALID_CTIME BIT(9) /* cached ctime is invalid */ | |
254 | #define NFS_INO_INVALID_MTIME BIT(10) /* cached mtime is invalid */ | |
255 | #define NFS_INO_INVALID_SIZE BIT(11) /* cached size is invalid */ | |
256 | #define NFS_INO_INVALID_OTHER BIT(12) /* other attrs are invalid */ | |
1c341b77 TM |
257 | #define NFS_INO_DATA_INVAL_DEFER \ |
258 | BIT(13) /* Deferred cache invalidation */ | |
3a39e778 | 259 | #define NFS_INO_INVALID_BLOCKS BIT(14) /* cached blocks are invalid */ |
0f44da51 | 260 | #define NFS_INO_INVALID_XATTR BIT(15) /* xattrs are invalid */ |
fabf2b34 | 261 | #define NFS_INO_INVALID_NLINK BIT(16) /* cached nlinks is invalid */ |
720869eb | 262 | #define NFS_INO_INVALID_MODE BIT(17) /* cached mode is invalid */ |
16e14375 TM |
263 | |
264 | #define NFS_INO_INVALID_ATTR (NFS_INO_INVALID_CHANGE \ | |
265 | | NFS_INO_INVALID_CTIME \ | |
266 | | NFS_INO_INVALID_MTIME \ | |
267 | | NFS_INO_INVALID_SIZE \ | |
fabf2b34 | 268 | | NFS_INO_INVALID_NLINK \ |
720869eb | 269 | | NFS_INO_INVALID_MODE \ |
16e14375 | 270 | | NFS_INO_INVALID_OTHER) /* inode metadata is invalid */ |
55296809 CL |
271 | |
272 | /* | |
412d582e | 273 | * Bit offsets in flags field |
55296809 | 274 | */ |
691beb13 TM |
275 | #define NFS_INO_STALE (1) /* possible stale inode */ |
276 | #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ | |
d529ef83 | 277 | #define NFS_INO_INVALIDATING (3) /* inode is being invalidated */ |
43245eca | 278 | #define NFS_INO_PRESERVE_UNLINKED (4) /* preserve file if removed while open */ |
ef79c097 | 279 | #define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ |
863a3c6c | 280 | #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ |
92407e75 | 281 | #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ |
1bfe3b25 | 282 | #define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */ |
a5864c99 | 283 | #define NFS_INO_ODIRECT (12) /* I/O setting is O_DIRECT */ |
1da177e4 | 284 | |
99fadcd7 | 285 | static inline struct nfs_inode *NFS_I(const struct inode *inode) |
1da177e4 LT |
286 | { |
287 | return container_of(inode, struct nfs_inode, vfs_inode); | |
288 | } | |
99fadcd7 BH |
289 | |
290 | static inline struct nfs_server *NFS_SB(const struct super_block *s) | |
291 | { | |
292 | return (struct nfs_server *)(s->s_fs_info); | |
293 | } | |
294 | ||
295 | static inline struct nfs_fh *NFS_FH(const struct inode *inode) | |
296 | { | |
297 | return &NFS_I(inode)->fh; | |
298 | } | |
299 | ||
300 | static inline struct nfs_server *NFS_SERVER(const struct inode *inode) | |
301 | { | |
302 | return NFS_SB(inode->i_sb); | |
303 | } | |
304 | ||
305 | static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) | |
306 | { | |
307 | return NFS_SERVER(inode)->client; | |
308 | } | |
309 | ||
310 | static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) | |
311 | { | |
312 | return NFS_SERVER(inode)->nfs_client->rpc_ops; | |
313 | } | |
314 | ||
99fadcd7 BH |
315 | static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) |
316 | { | |
317 | struct nfs_server *nfss = NFS_SERVER(inode); | |
318 | return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; | |
319 | } | |
320 | ||
321 | static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) | |
322 | { | |
323 | struct nfs_server *nfss = NFS_SERVER(inode); | |
324 | return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; | |
325 | } | |
326 | ||
327 | static inline int NFS_STALE(const struct inode *inode) | |
328 | { | |
329 | return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); | |
330 | } | |
331 | ||
f1fe29b4 | 332 | static inline struct fscache_cookie *nfs_i_fscache(struct inode *inode) |
ef79c097 | 333 | { |
f1fe29b4 DH |
334 | #ifdef CONFIG_NFS_FSCACHE |
335 | return NFS_I(inode)->fscache; | |
336 | #else | |
337 | return NULL; | |
338 | #endif | |
ef79c097 DH |
339 | } |
340 | ||
99fadcd7 BH |
341 | static inline __u64 NFS_FILEID(const struct inode *inode) |
342 | { | |
343 | return NFS_I(inode)->fileid; | |
344 | } | |
345 | ||
346 | static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) | |
347 | { | |
348 | NFS_I(inode)->fileid = fileid; | |
349 | } | |
1da177e4 | 350 | |
decf491f TM |
351 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
352 | { | |
38478b24 TM |
353 | struct nfs_inode *nfsi = NFS_I(inode); |
354 | ||
decf491f | 355 | spin_lock(&inode->i_lock); |
88a6099f TM |
356 | nfsi->cache_validity |= NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | |
357 | NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME | | |
358 | NFS_INO_INVALID_SIZE; | |
f3821110 | 359 | if (S_ISDIR(inode->i_mode)) |
115c48d7 | 360 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
decf491f TM |
361 | spin_unlock(&inode->i_lock); |
362 | } | |
363 | ||
1a93b82c | 364 | static inline int nfs_server_capable(const struct inode *inode, int cap) |
1da177e4 LT |
365 | { |
366 | return NFS_SERVER(inode)->caps & cap; | |
367 | } | |
368 | ||
1da177e4 LT |
369 | /** |
370 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
8edb0182 | 371 | * @dir - pointer to parent directory inode |
efeda80d TM |
372 | * The "cache change attribute" is updated when we need to revalidate |
373 | * our dentry cache after a directory was seen to change on the server. | |
1da177e4 | 374 | */ |
8edb0182 | 375 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
1da177e4 | 376 | { |
8edb0182 | 377 | return NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
378 | } |
379 | ||
1da177e4 LT |
380 | /* |
381 | * linux/fs/nfs/inode.c | |
382 | */ | |
29884df0 | 383 | extern int nfs_sync_mapping(struct address_space *mapping); |
cd9ae2b6 | 384 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 385 | extern void nfs_zap_caches(struct inode *); |
93ce4af7 | 386 | extern void nfs_set_inode_stale(struct inode *inode); |
c4812998 | 387 | extern void nfs_invalidate_atime(struct inode *); |
1da177e4 | 388 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
cf7ab00a | 389 | struct nfs_fattr *); |
f174ff7a | 390 | struct inode *nfs_ilookup(struct super_block *sb, struct nfs_fattr *, struct nfs_fh *); |
1da177e4 | 391 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); |
decf491f | 392 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
70ca8852 | 393 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
a08a8cd3 | 394 | extern int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr); |
b74d24f7 | 395 | extern int nfs_getattr(struct mnt_idmap *, const struct path *, |
549c7297 | 396 | struct kstat *, u32, unsigned int); |
73fbb3fa | 397 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *, const struct cred *); |
6168f62c | 398 | extern void nfs_access_set_mask(struct nfs_access_entry *, u32); |
549c7297 | 399 | extern int nfs_permission(struct user_namespace *, struct inode *, int); |
1da177e4 | 400 | extern int nfs_open(struct inode *, struct file *); |
43f291cd | 401 | extern int nfs_attribute_cache_expired(struct inode *inode); |
1f3208b2 | 402 | extern int nfs_revalidate_inode(struct inode *inode, unsigned long flags); |
1da177e4 | 403 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); |
28aa2f9e | 404 | extern int nfs_clear_invalid_mapping(struct address_space *mapping); |
1cd9cb05 | 405 | extern bool nfs_mapping_need_revalidate_inode(struct inode *inode); |
44b11874 | 406 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
0d0def49 | 407 | extern int nfs_revalidate_mapping_rcu(struct inode *inode); |
c1632a0f | 408 | extern int nfs_setattr(struct mnt_idmap *, struct dentry *, struct iattr *); |
f044636d | 409 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, struct nfs_fattr *); |
dd225cb3 | 410 | extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr); |
1da177e4 LT |
411 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
412 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
a52458b4 | 413 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode); |
532d4def | 414 | extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode, struct file *filp); |
c45ffdd2 | 415 | extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx); |
cd9a1c0e | 416 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); |
aff8d8dc | 417 | extern void nfs_file_clear_open_context(struct file *flip); |
f11ac8db TM |
418 | extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); |
419 | extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); | |
f43bf0be | 420 | extern u64 nfs_compat_user_ino64(u64 fileid); |
4704f0e2 | 421 | extern void nfs_fattr_init(struct nfs_fattr *fattr); |
140e049c | 422 | extern void nfs_fattr_set_barrier(struct nfs_fattr *fattr); |
56463e50 | 423 | extern unsigned long nfs_inc_attr_generation_counter(void); |
1da177e4 | 424 | |
2d36bfde | 425 | extern struct nfs_fattr *nfs_alloc_fattr(void); |
d755ad8d AS |
426 | extern struct nfs_fattr *nfs_alloc_fattr_with_label(struct nfs_server *server); |
427 | ||
428 | static inline void nfs4_label_free(struct nfs4_label *label) | |
429 | { | |
430 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL | |
431 | if (label) { | |
432 | kfree(label->label); | |
433 | kfree(label); | |
434 | } | |
435 | #endif | |
436 | } | |
2d36bfde TM |
437 | |
438 | static inline void nfs_free_fattr(const struct nfs_fattr *fattr) | |
439 | { | |
d755ad8d AS |
440 | if (fattr) |
441 | nfs4_label_free(fattr->label); | |
2d36bfde TM |
442 | kfree(fattr); |
443 | } | |
444 | ||
445 | extern struct nfs_fh *nfs_alloc_fhandle(void); | |
446 | ||
447 | static inline void nfs_free_fhandle(const struct nfs_fh *fh) | |
448 | { | |
449 | kfree(fh); | |
450 | } | |
451 | ||
e27d359e | 452 | #ifdef NFS_DEBUG |
d8e0539e WAA |
453 | extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh); |
454 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
455 | { | |
456 | return _nfs_display_fhandle_hash(fh); | |
457 | } | |
20d27e92 CL |
458 | extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption); |
459 | #define nfs_display_fhandle(fh, caption) \ | |
460 | do { \ | |
461 | if (unlikely(nfs_debug & NFSDBG_FACILITY)) \ | |
462 | _nfs_display_fhandle(fh, caption); \ | |
463 | } while (0) | |
464 | #else | |
d8e0539e WAA |
465 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) |
466 | { | |
9304a812 | 467 | return 0; |
d8e0539e | 468 | } |
20d27e92 CL |
469 | static inline void nfs_display_fhandle(const struct nfs_fh *fh, |
470 | const char *caption) | |
471 | { | |
472 | } | |
473 | #endif | |
474 | ||
56463e50 CL |
475 | /* |
476 | * linux/fs/nfs/nfsroot.c | |
477 | */ | |
478 | extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ | |
1da177e4 | 479 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ |
5a874db4 | 480 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
0e574af1 | 481 | |
1da177e4 LT |
482 | /* |
483 | * linux/fs/nfs/file.c | |
484 | */ | |
4b6f5d20 | 485 | extern const struct file_operations nfs_file_operations; |
89d77c8f | 486 | #if IS_ENABLED(CONFIG_NFS_V4) |
1788ea6e JL |
487 | extern const struct file_operations nfs4_file_operations; |
488 | #endif /* CONFIG_NFS_V4 */ | |
f5e54d6e | 489 | extern const struct address_space_operations nfs_file_aops; |
11de3b11 | 490 | extern const struct address_space_operations nfs_dir_aops; |
1da177e4 | 491 | |
c03025d5 TM |
492 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
493 | { | |
494 | return filp->private_data; | |
495 | } | |
496 | ||
a52458b4 | 497 | static inline const struct cred *nfs_file_cred(struct file *file) |
1da177e4 | 498 | { |
504e5189 NB |
499 | if (file != NULL) { |
500 | struct nfs_open_context *ctx = | |
501 | nfs_file_open_context(file); | |
502 | if (ctx) | |
503 | return ctx->cred; | |
504 | } | |
1da177e4 LT |
505 | return NULL; |
506 | } | |
507 | ||
508 | /* | |
509 | * linux/fs/nfs/direct.c | |
510 | */ | |
eb79f3af | 511 | int nfs_swap_rw(struct kiocb *iocb, struct iov_iter *iter); |
64158668 N |
512 | ssize_t nfs_file_direct_read(struct kiocb *iocb, |
513 | struct iov_iter *iter, bool swap); | |
514 | ssize_t nfs_file_direct_write(struct kiocb *iocb, | |
515 | struct iov_iter *iter, bool swap); | |
1da177e4 LT |
516 | |
517 | /* | |
518 | * linux/fs/nfs/dir.c | |
519 | */ | |
4b6f5d20 | 520 | extern const struct file_operations nfs_dir_operations; |
f786aa90 | 521 | extern const struct dentry_operations nfs_dentry_operations; |
1da177e4 | 522 | |
bfc69a45 | 523 | extern void nfs_force_lookup_revalidate(struct inode *dir); |
efeda80d TM |
524 | extern void nfs_set_verifier(struct dentry * dentry, unsigned long verf); |
525 | #if IS_ENABLED(CONFIG_NFS_V4) | |
526 | extern void nfs_clear_verifier_delegated(struct inode *inode); | |
527 | #endif /* IS_ENABLED(CONFIG_NFS_V4) */ | |
406cd915 | 528 | extern struct dentry *nfs_add_or_obtain(struct dentry *dentry, |
cc6f3298 | 529 | struct nfs_fh *fh, struct nfs_fattr *fattr); |
1775fd3e | 530 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, |
d91bfc46 | 531 | struct nfs_fattr *fattr); |
b68572e0 | 532 | extern int nfs_may_open(struct inode *inode, const struct cred *cred, int openflags); |
af22f94a | 533 | extern void nfs_access_zap_cache(struct inode *inode); |
b5e7b59c N |
534 | extern int nfs_access_get_cached(struct inode *inode, const struct cred *cred, |
535 | u32 *mask, bool may_block); | |
1da177e4 LT |
536 | |
537 | /* | |
538 | * linux/fs/nfs/symlink.c | |
539 | */ | |
c5ef1c42 | 540 | extern const struct inode_operations nfs_symlink_inode_operations; |
1da177e4 | 541 | |
a72b4422 TM |
542 | /* |
543 | * linux/fs/nfs/sysctl.c | |
544 | */ | |
545 | #ifdef CONFIG_SYSCTL | |
546 | extern int nfs_register_sysctl(void); | |
547 | extern void nfs_unregister_sysctl(void); | |
548 | #else | |
7fd105e7 | 549 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
550 | #define nfs_unregister_sysctl() do { } while(0) |
551 | #endif | |
552 | ||
55a97593 TM |
553 | /* |
554 | * linux/fs/nfs/namespace.c | |
555 | */ | |
c5ef1c42 AV |
556 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
557 | extern const struct inode_operations nfs_referral_inode_operations; | |
51d8fa6a TM |
558 | extern int nfs_mountpoint_expiry_timeout; |
559 | extern void nfs_release_automount_timer(void); | |
55a97593 | 560 | |
1da177e4 LT |
561 | /* |
562 | * linux/fs/nfs/unlink.c | |
563 | */ | |
e4eff1a6 | 564 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); |
1da177e4 LT |
565 | |
566 | /* | |
567 | * linux/fs/nfs/write.c | |
568 | */ | |
89a09141 | 569 | extern int nfs_congestion_kb; |
1da177e4 LT |
570 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
571 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
572 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
573 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
1da177e4 LT |
574 | |
575 | /* | |
576 | * Try to write back everything synchronously (but check the | |
577 | * return value!) | |
578 | */ | |
9e1681c2 | 579 | extern int nfs_sync_inode(struct inode *inode); |
1c75950b | 580 | extern int nfs_wb_all(struct inode *inode); |
c373fff7 | 581 | extern int nfs_wb_page(struct inode *inode, struct page *page); |
6d740c76 | 582 | int nfs_wb_folio_cancel(struct inode *inode, struct folio *folio); |
b608b283 | 583 | extern int nfs_commit_inode(struct inode *, int); |
515dcdcd | 584 | extern struct nfs_commit_data *nfs_commitdata_alloc(void); |
0b7c0153 | 585 | extern void nfs_commit_free(struct nfs_commit_data *data); |
133a48ab | 586 | bool nfs_commit_end(struct nfs_mds_commit_info *cinfo); |
1da177e4 | 587 | |
1a93b82c | 588 | static inline bool nfs_have_writebacks(const struct inode *inode) |
1da177e4 | 589 | { |
0ebeebcf DW |
590 | if (S_ISREG(inode->i_mode)) |
591 | return atomic_long_read(&NFS_I(inode)->nrequests) != 0; | |
1a93b82c | 592 | return false; |
1da177e4 LT |
593 | } |
594 | ||
1da177e4 LT |
595 | /* |
596 | * linux/fs/nfs/read.c | |
597 | */ | |
65d023af | 598 | int nfs_read_folio(struct file *, struct folio *); |
8786fde8 | 599 | void nfs_readahead(struct readahead_control *); |
963d8fe5 | 600 | |
1da177e4 LT |
601 | /* |
602 | * inline functions | |
603 | */ | |
604 | ||
433c9237 | 605 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
1da177e4 | 606 | { |
50ab8ec7 | 607 | return min_t(u64, size, OFFSET_MAX); |
1da177e4 LT |
608 | } |
609 | ||
610 | static inline ino_t | |
611 | nfs_fileid_to_ino_t(u64 fileid) | |
612 | { | |
613 | ino_t ino = (ino_t) fileid; | |
614 | if (sizeof(ino_t) < sizeof(u64)) | |
615 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
616 | return ino; | |
617 | } | |
618 | ||
1da177e4 LT |
619 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) |
620 | ||
3c59366c N |
621 | /* We need to block new opens while a file is being unlinked. |
622 | * If it is opened *before* we decide to unlink, we will silly-rename | |
623 | * instead. If it is opened *after*, then we need to create or will fail. | |
624 | * If we allow the two to race, we could end up with a file that is open | |
625 | * but deleted on the server resulting in ESTALE. | |
626 | * So use ->d_fsdata to record when the unlink is happening | |
627 | * and block dentry revalidation while it is set. | |
628 | */ | |
629 | #define NFS_FSDATA_BLOCKED ((void*)1) | |
4dc2eaec | 630 | |
1da177e4 LT |
631 | # undef ifdebug |
632 | # ifdef NFS_DEBUG | |
633 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
6f00866d | 634 | # define NFS_IFDEBUG(x) x |
1da177e4 LT |
635 | # else |
636 | # define ifdebug(fac) if (0) | |
6f00866d | 637 | # define NFS_IFDEBUG(x) |
1da177e4 | 638 | # endif |
1da177e4 | 639 | #endif |