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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/include/linux/nfs_fs.h | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * OS-specific nfs filesystem definitions and declarations | |
7 | */ | |
1da177e4 LT |
8 | #ifndef _LINUX_NFS_FS_H |
9 | #define _LINUX_NFS_FS_H | |
10 | ||
607ca46e | 11 | #include <uapi/linux/nfs_fs.h> |
03bf4b70 | 12 | |
1da177e4 | 13 | |
e27d359e TM |
14 | /* |
15 | * Enable dprintk() debugging support for nfs client. | |
16 | */ | |
17 | #ifdef CONFIG_NFS_DEBUG | |
18 | # define NFS_DEBUG | |
19 | #endif | |
20 | ||
7f1cbe51 DW |
21 | #include <linux/in.h> |
22 | #include <linux/mm.h> | |
23 | #include <linux/pagemap.h> | |
1c3c07e9 | 24 | #include <linux/rbtree.h> |
7f1cbe51 DW |
25 | #include <linux/rwsem.h> |
26 | #include <linux/wait.h> | |
27 | ||
28 | #include <linux/sunrpc/debug.h> | |
29 | #include <linux/sunrpc/auth.h> | |
30 | #include <linux/sunrpc/clnt.h> | |
31 | ||
32 | #include <linux/nfs.h> | |
33 | #include <linux/nfs2.h> | |
34 | #include <linux/nfs3.h> | |
35 | #include <linux/nfs4.h> | |
36 | #include <linux/nfs_xdr.h> | |
7f1cbe51 DW |
37 | #include <linux/nfs_fs_sb.h> |
38 | ||
7f1cbe51 DW |
39 | #include <linux/mempool.h> |
40 | ||
41 | /* | |
42 | * These are the default flags for swap requests | |
43 | */ | |
44 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) | |
45 | ||
1da177e4 LT |
46 | /* |
47 | * NFSv3/v4 Access mode cache entry | |
48 | */ | |
49 | struct nfs_access_entry { | |
1c3c07e9 | 50 | struct rb_node rb_node; |
cfcea3e8 | 51 | struct list_head lru; |
1da177e4 LT |
52 | unsigned long jiffies; |
53 | struct rpc_cred * cred; | |
54 | int mask; | |
55 | }; | |
56 | ||
2a369153 TM |
57 | struct nfs_lockowner { |
58 | fl_owner_t l_owner; | |
59 | pid_t l_pid; | |
60 | }; | |
61 | ||
f11ac8db TM |
62 | struct nfs_lock_context { |
63 | atomic_t count; | |
64 | struct list_head list; | |
65 | struct nfs_open_context *open_context; | |
2a369153 | 66 | struct nfs_lockowner lockowner; |
f11ac8db TM |
67 | }; |
68 | ||
1da177e4 LT |
69 | struct nfs4_state; |
70 | struct nfs_open_context { | |
f11ac8db | 71 | struct nfs_lock_context lock_context; |
3d4ff43d | 72 | struct dentry *dentry; |
1da177e4 LT |
73 | struct rpc_cred *cred; |
74 | struct nfs4_state *state; | |
dc0b027d | 75 | fmode_t mode; |
7b159fc1 TM |
76 | |
77 | unsigned long flags; | |
78 | #define NFS_CONTEXT_ERROR_WRITE (0) | |
05990d1b | 79 | #define NFS_CONTEXT_RESEND_WRITES (1) |
1da177e4 LT |
80 | int error; |
81 | ||
82 | struct list_head list; | |
82be417a | 83 | struct nfs4_threshold *mdsthreshold; |
480c2006 | 84 | }; |
00a92642 | 85 | |
480c2006 BS |
86 | struct nfs_open_dir_context { |
87 | struct rpc_cred *cred; | |
0c030806 | 88 | unsigned long attr_gencount; |
00a92642 | 89 | __u64 dir_cookie; |
8ef2ce3e | 90 | __u64 dup_cookie; |
0c030806 | 91 | signed char duped; |
1da177e4 LT |
92 | }; |
93 | ||
94 | /* | |
95 | * NFSv4 delegation | |
96 | */ | |
97 | struct nfs_delegation; | |
98 | ||
5c6a9f7d AG |
99 | struct posix_acl; |
100 | ||
1da177e4 LT |
101 | /* |
102 | * nfs fs inode data in memory | |
103 | */ | |
104 | struct nfs_inode { | |
105 | /* | |
106 | * The 64bit 'inode number' | |
107 | */ | |
108 | __u64 fileid; | |
109 | ||
110 | /* | |
111 | * NFS file handle | |
112 | */ | |
113 | struct nfs_fh fh; | |
114 | ||
115 | /* | |
116 | * Various flags | |
117 | */ | |
412d582e CL |
118 | unsigned long flags; /* atomic bit ops */ |
119 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
120 | |
121 | /* | |
24bd68f4 | 122 | * read_cache_jiffies is when we started read-caching this inode. |
1da177e4 LT |
123 | * attrtimeo is for how long the cached information is assumed |
124 | * to be valid. A successful attribute revalidation doubles | |
125 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
126 | * acregmin/acdirmin. | |
127 | * | |
128 | * We need to revalidate the cached attrs for this inode if | |
129 | * | |
64672d55 PS |
130 | * jiffies - read_cache_jiffies >= attrtimeo |
131 | * | |
132 | * Please note the comparison is greater than or equal | |
133 | * so that zero timeout values can be specified. | |
1da177e4 | 134 | */ |
1da177e4 LT |
135 | unsigned long read_cache_jiffies; |
136 | unsigned long attrtimeo; | |
137 | unsigned long attrtimeo_timestamp; | |
1da177e4 | 138 | |
4704f0e2 | 139 | unsigned long attr_gencount; |
1da177e4 LT |
140 | /* "Generation counter" for the attribute cache. This is |
141 | * bumped whenever we update the metadata on the | |
142 | * server. | |
143 | */ | |
144 | unsigned long cache_change_attribute; | |
1da177e4 | 145 | |
1c3c07e9 | 146 | struct rb_root access_cache; |
cfcea3e8 TM |
147 | struct list_head access_cache_entry_lru; |
148 | struct list_head access_cache_inode_lru; | |
5c6a9f7d AG |
149 | #ifdef CONFIG_NFS_V3_ACL |
150 | struct posix_acl *acl_access; | |
151 | struct posix_acl *acl_default; | |
152 | #endif | |
1da177e4 LT |
153 | |
154 | /* | |
155 | * This is the cookie verifier used for NFSv3 readdir | |
156 | * operations | |
157 | */ | |
bc4785cd | 158 | __be32 cookieverf[2]; |
1da177e4 | 159 | |
fb8a1f11 | 160 | unsigned long npages; |
ea2cf228 | 161 | struct nfs_mds_commit_info commit_info; |
1da177e4 LT |
162 | |
163 | /* Open contexts for shared mmap writes */ | |
164 | struct list_head open_files; | |
165 | ||
565277f6 TM |
166 | /* Number of in-flight sillydelete RPC calls */ |
167 | atomic_t silly_count; | |
168 | /* List of deferred sillydelete requests */ | |
169 | struct hlist_head silly_list; | |
170 | wait_queue_head_t waitqueue; | |
171 | ||
89d77c8f | 172 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e | 173 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
174 | /* NFSv4 state */ |
175 | struct list_head open_states; | |
5b22216e | 176 | struct nfs_delegation __rcu *delegation; |
bd7bf9d5 | 177 | fmode_t delegation_state; |
1da177e4 | 178 | struct rw_semaphore rwsem; |
e5e94017 BH |
179 | |
180 | /* pNFS layout information */ | |
181 | struct pnfs_layout_hdr *layout; | |
1da177e4 | 182 | #endif /* CONFIG_NFS_V4*/ |
2701d086 AA |
183 | /* how many bytes have been written/read and how many bytes queued up */ |
184 | __u64 write_io; | |
185 | __u64 read_io; | |
ef79c097 DH |
186 | #ifdef CONFIG_NFS_FSCACHE |
187 | struct fscache_cookie *fscache; | |
188 | #endif | |
1da177e4 LT |
189 | struct inode vfs_inode; |
190 | }; | |
191 | ||
192 | /* | |
55296809 | 193 | * Cache validity bit flags |
1da177e4 | 194 | */ |
55296809 CL |
195 | #define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */ |
196 | #define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ | |
197 | #define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ | |
198 | #define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ | |
199 | #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ | |
200 | #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ | |
412c77ce | 201 | #define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */ |
55296809 CL |
202 | |
203 | /* | |
412d582e | 204 | * Bit offsets in flags field |
55296809 | 205 | */ |
691beb13 TM |
206 | #define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */ |
207 | #define NFS_INO_STALE (1) /* possible stale inode */ | |
208 | #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ | |
72cb77f4 | 209 | #define NFS_INO_FLUSHING (4) /* inode is flushing out data */ |
ef79c097 DH |
210 | #define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ |
211 | #define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */ | |
71d0a611 | 212 | #define NFS_INO_COMMIT (7) /* inode is committing unstable writes */ |
863a3c6c | 213 | #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ |
92407e75 | 214 | #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ |
1da177e4 | 215 | |
99fadcd7 | 216 | static inline struct nfs_inode *NFS_I(const struct inode *inode) |
1da177e4 LT |
217 | { |
218 | return container_of(inode, struct nfs_inode, vfs_inode); | |
219 | } | |
99fadcd7 BH |
220 | |
221 | static inline struct nfs_server *NFS_SB(const struct super_block *s) | |
222 | { | |
223 | return (struct nfs_server *)(s->s_fs_info); | |
224 | } | |
225 | ||
226 | static inline struct nfs_fh *NFS_FH(const struct inode *inode) | |
227 | { | |
228 | return &NFS_I(inode)->fh; | |
229 | } | |
230 | ||
231 | static inline struct nfs_server *NFS_SERVER(const struct inode *inode) | |
232 | { | |
233 | return NFS_SB(inode->i_sb); | |
234 | } | |
235 | ||
236 | static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) | |
237 | { | |
238 | return NFS_SERVER(inode)->client; | |
239 | } | |
240 | ||
241 | static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) | |
242 | { | |
243 | return NFS_SERVER(inode)->nfs_client->rpc_ops; | |
244 | } | |
245 | ||
99fadcd7 BH |
246 | static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) |
247 | { | |
248 | struct nfs_server *nfss = NFS_SERVER(inode); | |
249 | return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; | |
250 | } | |
251 | ||
252 | static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) | |
253 | { | |
254 | struct nfs_server *nfss = NFS_SERVER(inode); | |
255 | return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; | |
256 | } | |
257 | ||
258 | static inline int NFS_STALE(const struct inode *inode) | |
259 | { | |
260 | return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); | |
261 | } | |
262 | ||
ef79c097 DH |
263 | static inline int NFS_FSCACHE(const struct inode *inode) |
264 | { | |
265 | return test_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags); | |
266 | } | |
267 | ||
99fadcd7 BH |
268 | static inline __u64 NFS_FILEID(const struct inode *inode) |
269 | { | |
270 | return NFS_I(inode)->fileid; | |
271 | } | |
272 | ||
273 | static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) | |
274 | { | |
275 | NFS_I(inode)->fileid = fileid; | |
276 | } | |
1da177e4 | 277 | |
decf491f TM |
278 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
279 | { | |
38478b24 TM |
280 | struct nfs_inode *nfsi = NFS_I(inode); |
281 | ||
decf491f | 282 | spin_lock(&inode->i_lock); |
38478b24 | 283 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS; |
f3821110 | 284 | if (S_ISDIR(inode->i_mode)) |
38478b24 | 285 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
decf491f TM |
286 | spin_unlock(&inode->i_lock); |
287 | } | |
288 | ||
1da177e4 LT |
289 | static inline int nfs_server_capable(struct inode *inode, int cap) |
290 | { | |
291 | return NFS_SERVER(inode)->caps & cap; | |
292 | } | |
293 | ||
d75340cc TM |
294 | static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) |
295 | { | |
296 | dentry->d_time = verf; | |
297 | } | |
298 | ||
1da177e4 LT |
299 | /** |
300 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
8edb0182 | 301 | * @dir - pointer to parent directory inode |
1da177e4 LT |
302 | * The "change attribute" is updated every time we finish an operation |
303 | * that will result in a metadata change on the server. | |
304 | */ | |
8edb0182 | 305 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
1da177e4 | 306 | { |
8edb0182 | 307 | return NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
308 | } |
309 | ||
310 | /** | |
4b841736 TM |
311 | * nfs_verify_change_attribute - Detects NFS remote directory changes |
312 | * @dir - pointer to parent directory inode | |
1da177e4 | 313 | * @chattr - previously saved change attribute |
4b841736 TM |
314 | * Return "false" if the verifiers doesn't match the change attribute. |
315 | * This would usually indicate that the directory contents have changed on | |
316 | * the server, and that any dentries need revalidating. | |
1da177e4 | 317 | */ |
4b841736 | 318 | static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr) |
1da177e4 | 319 | { |
4b841736 | 320 | return chattr == NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
321 | } |
322 | ||
323 | /* | |
324 | * linux/fs/nfs/inode.c | |
325 | */ | |
29884df0 | 326 | extern int nfs_sync_mapping(struct address_space *mapping); |
cd9ae2b6 | 327 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 328 | extern void nfs_zap_caches(struct inode *); |
c4812998 | 329 | extern void nfs_invalidate_atime(struct inode *); |
1da177e4 LT |
330 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
331 | struct nfs_fattr *); | |
332 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); | |
decf491f | 333 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
70ca8852 | 334 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
1da177e4 | 335 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
6168f62c WAA |
336 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); |
337 | extern void nfs_access_set_mask(struct nfs_access_entry *, u32); | |
10556cb2 | 338 | extern int nfs_permission(struct inode *, int); |
1da177e4 LT |
339 | extern int nfs_open(struct inode *, struct file *); |
340 | extern int nfs_release(struct inode *, struct file *); | |
341 | extern int nfs_attribute_timeout(struct inode *inode); | |
342 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); | |
343 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
44b11874 | 344 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 345 | extern int nfs_setattr(struct dentry *, struct iattr *); |
65e4308d | 346 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); |
1da177e4 LT |
347 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
348 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
dc0b027d | 349 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode); |
5ede7b1c | 350 | extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode); |
cd9a1c0e | 351 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); |
f11ac8db TM |
352 | extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); |
353 | extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); | |
f43bf0be | 354 | extern u64 nfs_compat_user_ino64(u64 fileid); |
4704f0e2 | 355 | extern void nfs_fattr_init(struct nfs_fattr *fattr); |
56463e50 | 356 | extern unsigned long nfs_inc_attr_generation_counter(void); |
1da177e4 | 357 | |
2d36bfde TM |
358 | extern struct nfs_fattr *nfs_alloc_fattr(void); |
359 | ||
360 | static inline void nfs_free_fattr(const struct nfs_fattr *fattr) | |
361 | { | |
362 | kfree(fattr); | |
363 | } | |
364 | ||
365 | extern struct nfs_fh *nfs_alloc_fhandle(void); | |
366 | ||
367 | static inline void nfs_free_fhandle(const struct nfs_fh *fh) | |
368 | { | |
369 | kfree(fh); | |
370 | } | |
371 | ||
e27d359e | 372 | #ifdef NFS_DEBUG |
d8e0539e WAA |
373 | extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh); |
374 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
375 | { | |
376 | return _nfs_display_fhandle_hash(fh); | |
377 | } | |
20d27e92 CL |
378 | extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption); |
379 | #define nfs_display_fhandle(fh, caption) \ | |
380 | do { \ | |
381 | if (unlikely(nfs_debug & NFSDBG_FACILITY)) \ | |
382 | _nfs_display_fhandle(fh, caption); \ | |
383 | } while (0) | |
384 | #else | |
d8e0539e WAA |
385 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) |
386 | { | |
9304a812 | 387 | return 0; |
d8e0539e | 388 | } |
20d27e92 CL |
389 | static inline void nfs_display_fhandle(const struct nfs_fh *fh, |
390 | const char *caption) | |
391 | { | |
392 | } | |
393 | #endif | |
394 | ||
56463e50 CL |
395 | /* |
396 | * linux/fs/nfs/nfsroot.c | |
397 | */ | |
398 | extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ | |
1da177e4 | 399 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ |
5a874db4 | 400 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
0e574af1 | 401 | |
1da177e4 LT |
402 | /* |
403 | * linux/fs/nfs/file.c | |
404 | */ | |
4b6f5d20 | 405 | extern const struct file_operations nfs_file_operations; |
89d77c8f | 406 | #if IS_ENABLED(CONFIG_NFS_V4) |
1788ea6e JL |
407 | extern const struct file_operations nfs4_file_operations; |
408 | #endif /* CONFIG_NFS_V4 */ | |
f5e54d6e | 409 | extern const struct address_space_operations nfs_file_aops; |
11de3b11 | 410 | extern const struct address_space_operations nfs_dir_aops; |
1da177e4 | 411 | |
c03025d5 TM |
412 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
413 | { | |
414 | return filp->private_data; | |
415 | } | |
416 | ||
1da177e4 LT |
417 | static inline struct rpc_cred *nfs_file_cred(struct file *file) |
418 | { | |
504e5189 NB |
419 | if (file != NULL) { |
420 | struct nfs_open_context *ctx = | |
421 | nfs_file_open_context(file); | |
422 | if (ctx) | |
423 | return ctx->cred; | |
424 | } | |
1da177e4 LT |
425 | return NULL; |
426 | } | |
427 | ||
b7fa0554 AG |
428 | /* |
429 | * linux/fs/nfs/xattr.c | |
430 | */ | |
431 | #ifdef CONFIG_NFS_V3_ACL | |
432 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); | |
433 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); | |
434 | extern int nfs3_setxattr(struct dentry *, const char *, | |
435 | const void *, size_t, int); | |
436 | extern int nfs3_removexattr (struct dentry *, const char *name); | |
437 | #else | |
438 | # define nfs3_listxattr NULL | |
439 | # define nfs3_getxattr NULL | |
440 | # define nfs3_setxattr NULL | |
441 | # define nfs3_removexattr NULL | |
442 | #endif | |
443 | ||
1da177e4 LT |
444 | /* |
445 | * linux/fs/nfs/direct.c | |
446 | */ | |
447 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, | |
448 | unsigned long); | |
027445c3 BP |
449 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, |
450 | const struct iovec *iov, unsigned long nr_segs, | |
a564b8f0 | 451 | loff_t pos, bool uio); |
027445c3 BP |
452 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, |
453 | const struct iovec *iov, unsigned long nr_segs, | |
a564b8f0 | 454 | loff_t pos, bool uio); |
1da177e4 LT |
455 | |
456 | /* | |
457 | * linux/fs/nfs/dir.c | |
458 | */ | |
4b6f5d20 | 459 | extern const struct file_operations nfs_dir_operations; |
f786aa90 | 460 | extern const struct dentry_operations nfs_dentry_operations; |
1da177e4 | 461 | |
bfc69a45 | 462 | extern void nfs_force_lookup_revalidate(struct inode *dir); |
1da177e4 | 463 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); |
af22f94a TM |
464 | extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags); |
465 | extern void nfs_access_zap_cache(struct inode *inode); | |
1da177e4 LT |
466 | |
467 | /* | |
468 | * linux/fs/nfs/symlink.c | |
469 | */ | |
c5ef1c42 | 470 | extern const struct inode_operations nfs_symlink_inode_operations; |
1da177e4 | 471 | |
a72b4422 TM |
472 | /* |
473 | * linux/fs/nfs/sysctl.c | |
474 | */ | |
475 | #ifdef CONFIG_SYSCTL | |
476 | extern int nfs_register_sysctl(void); | |
477 | extern void nfs_unregister_sysctl(void); | |
478 | #else | |
7fd105e7 | 479 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
480 | #define nfs_unregister_sysctl() do { } while(0) |
481 | #endif | |
482 | ||
55a97593 TM |
483 | /* |
484 | * linux/fs/nfs/namespace.c | |
485 | */ | |
c5ef1c42 AV |
486 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
487 | extern const struct inode_operations nfs_referral_inode_operations; | |
51d8fa6a TM |
488 | extern int nfs_mountpoint_expiry_timeout; |
489 | extern void nfs_release_automount_timer(void); | |
55a97593 | 490 | |
1da177e4 LT |
491 | /* |
492 | * linux/fs/nfs/unlink.c | |
493 | */ | |
e4eff1a6 | 494 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); |
565277f6 TM |
495 | extern void nfs_block_sillyrename(struct dentry *dentry); |
496 | extern void nfs_unblock_sillyrename(struct dentry *dentry); | |
779c5179 | 497 | extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); |
1da177e4 LT |
498 | |
499 | /* | |
500 | * linux/fs/nfs/write.c | |
501 | */ | |
89a09141 | 502 | extern int nfs_congestion_kb; |
1da177e4 LT |
503 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
504 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
505 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
506 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
13602896 | 507 | extern void nfs_writeback_done(struct rpc_task *, struct nfs_write_data *); |
1da177e4 LT |
508 | |
509 | /* | |
510 | * Try to write back everything synchronously (but check the | |
511 | * return value!) | |
512 | */ | |
1c75950b TM |
513 | extern int nfs_wb_all(struct inode *inode); |
514 | extern int nfs_wb_page(struct inode *inode, struct page* page); | |
1b3b4a1a | 515 | extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); |
89d77c8f | 516 | #if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4) |
b608b283 | 517 | extern int nfs_commit_inode(struct inode *, int); |
0b7c0153 FI |
518 | extern struct nfs_commit_data *nfs_commitdata_alloc(void); |
519 | extern void nfs_commit_free(struct nfs_commit_data *data); | |
77a63f3d TM |
520 | #else |
521 | static inline int | |
522 | nfs_commit_inode(struct inode *inode, int how) | |
523 | { | |
524 | return 0; | |
525 | } | |
1da177e4 LT |
526 | #endif |
527 | ||
528 | static inline int | |
529 | nfs_have_writebacks(struct inode *inode) | |
530 | { | |
531 | return NFS_I(inode)->npages != 0; | |
532 | } | |
533 | ||
1da177e4 LT |
534 | /* |
535 | * linux/fs/nfs/read.c | |
536 | */ | |
537 | extern int nfs_readpage(struct file *, struct page *); | |
538 | extern int nfs_readpages(struct file *, struct address_space *, | |
539 | struct list_head *, unsigned); | |
ec06c096 | 540 | extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *); |
f42b293d DH |
541 | extern int nfs_readpage_async(struct nfs_open_context *, struct inode *, |
542 | struct page *); | |
963d8fe5 | 543 | |
b7fa0554 AG |
544 | /* |
545 | * linux/fs/nfs3proc.c | |
546 | */ | |
547 | #ifdef CONFIG_NFS_V3_ACL | |
548 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); | |
549 | extern int nfs3_proc_setacl(struct inode *inode, int type, | |
550 | struct posix_acl *acl); | |
055ffbea | 551 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
d3fb6120 | 552 | umode_t mode); |
5c6a9f7d | 553 | extern void nfs3_forget_cached_acls(struct inode *inode); |
055ffbea AG |
554 | #else |
555 | static inline int nfs3_proc_set_default_acl(struct inode *dir, | |
556 | struct inode *inode, | |
d3fb6120 | 557 | umode_t mode) |
055ffbea AG |
558 | { |
559 | return 0; | |
560 | } | |
5c6a9f7d AG |
561 | |
562 | static inline void nfs3_forget_cached_acls(struct inode *inode) | |
563 | { | |
564 | } | |
b7fa0554 AG |
565 | #endif /* CONFIG_NFS_V3_ACL */ |
566 | ||
1da177e4 LT |
567 | /* |
568 | * inline functions | |
569 | */ | |
570 | ||
433c9237 | 571 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
1da177e4 | 572 | { |
433c9237 CL |
573 | if (size > (__u64) OFFSET_MAX - 1) |
574 | return OFFSET_MAX - 1; | |
1da177e4 LT |
575 | return (loff_t) size; |
576 | } | |
577 | ||
578 | static inline ino_t | |
579 | nfs_fileid_to_ino_t(u64 fileid) | |
580 | { | |
581 | ino_t ino = (ino_t) fileid; | |
582 | if (sizeof(ino_t) < sizeof(u64)) | |
583 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
584 | return ino; | |
585 | } | |
586 | ||
1da177e4 LT |
587 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) |
588 | ||
4dc2eaec | 589 | |
1da177e4 LT |
590 | # undef ifdebug |
591 | # ifdef NFS_DEBUG | |
592 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
6f00866d | 593 | # define NFS_IFDEBUG(x) x |
1da177e4 LT |
594 | # else |
595 | # define ifdebug(fac) if (0) | |
6f00866d | 596 | # define NFS_IFDEBUG(x) |
1da177e4 | 597 | # endif |
1da177e4 | 598 | #endif |