Commit | Line | Data |
---|---|---|
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 | ||
577b4232 TM |
62 | #define NFS_IO_INPROGRESS 0 |
63 | struct nfs_io_counter { | |
64 | unsigned long flags; | |
65 | atomic_t io_count; | |
66 | }; | |
67 | ||
f11ac8db TM |
68 | struct nfs_lock_context { |
69 | atomic_t count; | |
70 | struct list_head list; | |
71 | struct nfs_open_context *open_context; | |
2a369153 | 72 | struct nfs_lockowner lockowner; |
577b4232 | 73 | struct nfs_io_counter io_count; |
f11ac8db TM |
74 | }; |
75 | ||
1da177e4 LT |
76 | struct nfs4_state; |
77 | struct nfs_open_context { | |
f11ac8db | 78 | struct nfs_lock_context lock_context; |
3d4ff43d | 79 | struct dentry *dentry; |
1da177e4 LT |
80 | struct rpc_cred *cred; |
81 | struct nfs4_state *state; | |
dc0b027d | 82 | fmode_t mode; |
7b159fc1 TM |
83 | |
84 | unsigned long flags; | |
85 | #define NFS_CONTEXT_ERROR_WRITE (0) | |
05990d1b | 86 | #define NFS_CONTEXT_RESEND_WRITES (1) |
c58c8441 | 87 | #define NFS_CONTEXT_BAD (2) |
1da177e4 LT |
88 | int error; |
89 | ||
90 | struct list_head list; | |
82be417a | 91 | struct nfs4_threshold *mdsthreshold; |
480c2006 | 92 | }; |
00a92642 | 93 | |
480c2006 BS |
94 | struct nfs_open_dir_context { |
95 | struct rpc_cred *cred; | |
0c030806 | 96 | unsigned long attr_gencount; |
00a92642 | 97 | __u64 dir_cookie; |
8ef2ce3e | 98 | __u64 dup_cookie; |
0c030806 | 99 | signed char duped; |
1da177e4 LT |
100 | }; |
101 | ||
102 | /* | |
103 | * NFSv4 delegation | |
104 | */ | |
105 | struct nfs_delegation; | |
106 | ||
5c6a9f7d AG |
107 | struct posix_acl; |
108 | ||
1da177e4 LT |
109 | /* |
110 | * nfs fs inode data in memory | |
111 | */ | |
112 | struct nfs_inode { | |
113 | /* | |
114 | * The 64bit 'inode number' | |
115 | */ | |
116 | __u64 fileid; | |
117 | ||
118 | /* | |
119 | * NFS file handle | |
120 | */ | |
121 | struct nfs_fh fh; | |
122 | ||
123 | /* | |
124 | * Various flags | |
125 | */ | |
412d582e CL |
126 | unsigned long flags; /* atomic bit ops */ |
127 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
128 | |
129 | /* | |
24bd68f4 | 130 | * read_cache_jiffies is when we started read-caching this inode. |
1da177e4 LT |
131 | * attrtimeo is for how long the cached information is assumed |
132 | * to be valid. A successful attribute revalidation doubles | |
133 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
134 | * acregmin/acdirmin. | |
135 | * | |
136 | * We need to revalidate the cached attrs for this inode if | |
137 | * | |
64672d55 PS |
138 | * jiffies - read_cache_jiffies >= attrtimeo |
139 | * | |
140 | * Please note the comparison is greater than or equal | |
141 | * so that zero timeout values can be specified. | |
1da177e4 | 142 | */ |
1da177e4 LT |
143 | unsigned long read_cache_jiffies; |
144 | unsigned long attrtimeo; | |
145 | unsigned long attrtimeo_timestamp; | |
1da177e4 | 146 | |
4704f0e2 | 147 | unsigned long attr_gencount; |
1da177e4 LT |
148 | /* "Generation counter" for the attribute cache. This is |
149 | * bumped whenever we update the metadata on the | |
150 | * server. | |
151 | */ | |
152 | unsigned long cache_change_attribute; | |
1da177e4 | 153 | |
1c3c07e9 | 154 | struct rb_root access_cache; |
cfcea3e8 TM |
155 | struct list_head access_cache_entry_lru; |
156 | struct list_head access_cache_inode_lru; | |
5c6a9f7d AG |
157 | #ifdef CONFIG_NFS_V3_ACL |
158 | struct posix_acl *acl_access; | |
159 | struct posix_acl *acl_default; | |
160 | #endif | |
1da177e4 LT |
161 | |
162 | /* | |
163 | * This is the cookie verifier used for NFSv3 readdir | |
164 | * operations | |
165 | */ | |
bc4785cd | 166 | __be32 cookieverf[2]; |
1da177e4 | 167 | |
fb8a1f11 | 168 | unsigned long npages; |
ea2cf228 | 169 | struct nfs_mds_commit_info commit_info; |
1da177e4 LT |
170 | |
171 | /* Open contexts for shared mmap writes */ | |
172 | struct list_head open_files; | |
173 | ||
565277f6 TM |
174 | /* Number of in-flight sillydelete RPC calls */ |
175 | atomic_t silly_count; | |
176 | /* List of deferred sillydelete requests */ | |
177 | struct hlist_head silly_list; | |
178 | wait_queue_head_t waitqueue; | |
179 | ||
89d77c8f | 180 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e | 181 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
182 | /* NFSv4 state */ |
183 | struct list_head open_states; | |
5b22216e | 184 | struct nfs_delegation __rcu *delegation; |
bd7bf9d5 | 185 | fmode_t delegation_state; |
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 LT |
197 | struct inode vfs_inode; |
198 | }; | |
199 | ||
200 | /* | |
55296809 | 201 | * Cache validity bit flags |
1da177e4 | 202 | */ |
55296809 CL |
203 | #define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */ |
204 | #define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ | |
205 | #define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ | |
206 | #define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ | |
207 | #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ | |
208 | #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ | |
412c77ce | 209 | #define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */ |
aa9c2669 | 210 | #define NFS_INO_INVALID_LABEL 0x0080 /* cached label is invalid */ |
55296809 CL |
211 | |
212 | /* | |
412d582e | 213 | * Bit offsets in flags field |
55296809 | 214 | */ |
691beb13 TM |
215 | #define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */ |
216 | #define NFS_INO_STALE (1) /* possible stale inode */ | |
217 | #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ | |
72cb77f4 | 218 | #define NFS_INO_FLUSHING (4) /* inode is flushing out data */ |
ef79c097 DH |
219 | #define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ |
220 | #define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */ | |
71d0a611 | 221 | #define NFS_INO_COMMIT (7) /* inode is committing unstable writes */ |
863a3c6c | 222 | #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ |
92407e75 | 223 | #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ |
1da177e4 | 224 | |
99fadcd7 | 225 | static inline struct nfs_inode *NFS_I(const struct inode *inode) |
1da177e4 LT |
226 | { |
227 | return container_of(inode, struct nfs_inode, vfs_inode); | |
228 | } | |
99fadcd7 BH |
229 | |
230 | static inline struct nfs_server *NFS_SB(const struct super_block *s) | |
231 | { | |
232 | return (struct nfs_server *)(s->s_fs_info); | |
233 | } | |
234 | ||
235 | static inline struct nfs_fh *NFS_FH(const struct inode *inode) | |
236 | { | |
237 | return &NFS_I(inode)->fh; | |
238 | } | |
239 | ||
240 | static inline struct nfs_server *NFS_SERVER(const struct inode *inode) | |
241 | { | |
242 | return NFS_SB(inode->i_sb); | |
243 | } | |
244 | ||
245 | static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) | |
246 | { | |
247 | return NFS_SERVER(inode)->client; | |
248 | } | |
249 | ||
250 | static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) | |
251 | { | |
252 | return NFS_SERVER(inode)->nfs_client->rpc_ops; | |
253 | } | |
254 | ||
99fadcd7 BH |
255 | static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) |
256 | { | |
257 | struct nfs_server *nfss = NFS_SERVER(inode); | |
258 | return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; | |
259 | } | |
260 | ||
261 | static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) | |
262 | { | |
263 | struct nfs_server *nfss = NFS_SERVER(inode); | |
264 | return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; | |
265 | } | |
266 | ||
267 | static inline int NFS_STALE(const struct inode *inode) | |
268 | { | |
269 | return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); | |
270 | } | |
271 | ||
f1fe29b4 | 272 | static inline struct fscache_cookie *nfs_i_fscache(struct inode *inode) |
ef79c097 | 273 | { |
f1fe29b4 DH |
274 | #ifdef CONFIG_NFS_FSCACHE |
275 | return NFS_I(inode)->fscache; | |
276 | #else | |
277 | return NULL; | |
278 | #endif | |
ef79c097 DH |
279 | } |
280 | ||
99fadcd7 BH |
281 | static inline __u64 NFS_FILEID(const struct inode *inode) |
282 | { | |
283 | return NFS_I(inode)->fileid; | |
284 | } | |
285 | ||
286 | static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) | |
287 | { | |
288 | NFS_I(inode)->fileid = fileid; | |
289 | } | |
1da177e4 | 290 | |
decf491f TM |
291 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
292 | { | |
38478b24 TM |
293 | struct nfs_inode *nfsi = NFS_I(inode); |
294 | ||
decf491f | 295 | spin_lock(&inode->i_lock); |
38478b24 | 296 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS; |
f3821110 | 297 | if (S_ISDIR(inode->i_mode)) |
38478b24 | 298 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
decf491f TM |
299 | spin_unlock(&inode->i_lock); |
300 | } | |
301 | ||
1da177e4 LT |
302 | static inline int nfs_server_capable(struct inode *inode, int cap) |
303 | { | |
304 | return NFS_SERVER(inode)->caps & cap; | |
305 | } | |
306 | ||
d75340cc TM |
307 | static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) |
308 | { | |
309 | dentry->d_time = verf; | |
310 | } | |
311 | ||
1da177e4 LT |
312 | /** |
313 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
8edb0182 | 314 | * @dir - pointer to parent directory inode |
1da177e4 LT |
315 | * The "change attribute" is updated every time we finish an operation |
316 | * that will result in a metadata change on the server. | |
317 | */ | |
8edb0182 | 318 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
1da177e4 | 319 | { |
8edb0182 | 320 | return NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
321 | } |
322 | ||
323 | /** | |
4b841736 TM |
324 | * nfs_verify_change_attribute - Detects NFS remote directory changes |
325 | * @dir - pointer to parent directory inode | |
1da177e4 | 326 | * @chattr - previously saved change attribute |
4b841736 TM |
327 | * Return "false" if the verifiers doesn't match the change attribute. |
328 | * This would usually indicate that the directory contents have changed on | |
329 | * the server, and that any dentries need revalidating. | |
1da177e4 | 330 | */ |
4b841736 | 331 | static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr) |
1da177e4 | 332 | { |
4b841736 | 333 | return chattr == NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
334 | } |
335 | ||
336 | /* | |
337 | * linux/fs/nfs/inode.c | |
338 | */ | |
29884df0 | 339 | extern int nfs_sync_mapping(struct address_space *mapping); |
cd9ae2b6 | 340 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 341 | extern void nfs_zap_caches(struct inode *); |
c4812998 | 342 | extern void nfs_invalidate_atime(struct inode *); |
1da177e4 | 343 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
1775fd3e | 344 | struct nfs_fattr *, struct nfs4_label *); |
1da177e4 | 345 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); |
decf491f | 346 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
70ca8852 | 347 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
1da177e4 | 348 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
6168f62c WAA |
349 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); |
350 | extern void nfs_access_set_mask(struct nfs_access_entry *, u32); | |
10556cb2 | 351 | extern int nfs_permission(struct inode *, int); |
1da177e4 LT |
352 | extern int nfs_open(struct inode *, struct file *); |
353 | extern int nfs_release(struct inode *, struct file *); | |
354 | extern int nfs_attribute_timeout(struct inode *inode); | |
43f291cd | 355 | extern int nfs_attribute_cache_expired(struct inode *inode); |
1da177e4 LT |
356 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); |
357 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
44b11874 | 358 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 359 | extern int nfs_setattr(struct dentry *, struct iattr *); |
65e4308d | 360 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); |
aa9c2669 DQ |
361 | extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
362 | struct nfs4_label *label); | |
1da177e4 LT |
363 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
364 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
dc0b027d | 365 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode); |
5ede7b1c | 366 | extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode); |
c45ffdd2 | 367 | extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx); |
cd9a1c0e | 368 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); |
f11ac8db TM |
369 | extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); |
370 | extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); | |
f43bf0be | 371 | extern u64 nfs_compat_user_ino64(u64 fileid); |
4704f0e2 | 372 | extern void nfs_fattr_init(struct nfs_fattr *fattr); |
56463e50 | 373 | extern unsigned long nfs_inc_attr_generation_counter(void); |
1da177e4 | 374 | |
2d36bfde TM |
375 | extern struct nfs_fattr *nfs_alloc_fattr(void); |
376 | ||
377 | static inline void nfs_free_fattr(const struct nfs_fattr *fattr) | |
378 | { | |
379 | kfree(fattr); | |
380 | } | |
381 | ||
382 | extern struct nfs_fh *nfs_alloc_fhandle(void); | |
383 | ||
384 | static inline void nfs_free_fhandle(const struct nfs_fh *fh) | |
385 | { | |
386 | kfree(fh); | |
387 | } | |
388 | ||
e27d359e | 389 | #ifdef NFS_DEBUG |
d8e0539e WAA |
390 | extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh); |
391 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
392 | { | |
393 | return _nfs_display_fhandle_hash(fh); | |
394 | } | |
20d27e92 CL |
395 | extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption); |
396 | #define nfs_display_fhandle(fh, caption) \ | |
397 | do { \ | |
398 | if (unlikely(nfs_debug & NFSDBG_FACILITY)) \ | |
399 | _nfs_display_fhandle(fh, caption); \ | |
400 | } while (0) | |
401 | #else | |
d8e0539e WAA |
402 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) |
403 | { | |
9304a812 | 404 | return 0; |
d8e0539e | 405 | } |
20d27e92 CL |
406 | static inline void nfs_display_fhandle(const struct nfs_fh *fh, |
407 | const char *caption) | |
408 | { | |
409 | } | |
410 | #endif | |
411 | ||
56463e50 CL |
412 | /* |
413 | * linux/fs/nfs/nfsroot.c | |
414 | */ | |
415 | extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ | |
1da177e4 | 416 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ |
5a874db4 | 417 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
0e574af1 | 418 | |
1da177e4 LT |
419 | /* |
420 | * linux/fs/nfs/file.c | |
421 | */ | |
4b6f5d20 | 422 | extern const struct file_operations nfs_file_operations; |
89d77c8f | 423 | #if IS_ENABLED(CONFIG_NFS_V4) |
1788ea6e JL |
424 | extern const struct file_operations nfs4_file_operations; |
425 | #endif /* CONFIG_NFS_V4 */ | |
f5e54d6e | 426 | extern const struct address_space_operations nfs_file_aops; |
11de3b11 | 427 | extern const struct address_space_operations nfs_dir_aops; |
1da177e4 | 428 | |
c03025d5 TM |
429 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
430 | { | |
431 | return filp->private_data; | |
432 | } | |
433 | ||
1da177e4 LT |
434 | static inline struct rpc_cred *nfs_file_cred(struct file *file) |
435 | { | |
504e5189 NB |
436 | if (file != NULL) { |
437 | struct nfs_open_context *ctx = | |
438 | nfs_file_open_context(file); | |
439 | if (ctx) | |
440 | return ctx->cred; | |
441 | } | |
1da177e4 LT |
442 | return NULL; |
443 | } | |
444 | ||
b7fa0554 AG |
445 | /* |
446 | * linux/fs/nfs/xattr.c | |
447 | */ | |
448 | #ifdef CONFIG_NFS_V3_ACL | |
449 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); | |
450 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); | |
451 | extern int nfs3_setxattr(struct dentry *, const char *, | |
452 | const void *, size_t, int); | |
453 | extern int nfs3_removexattr (struct dentry *, const char *name); | |
454 | #else | |
455 | # define nfs3_listxattr NULL | |
456 | # define nfs3_getxattr NULL | |
457 | # define nfs3_setxattr NULL | |
458 | # define nfs3_removexattr NULL | |
459 | #endif | |
460 | ||
1da177e4 LT |
461 | /* |
462 | * linux/fs/nfs/direct.c | |
463 | */ | |
464 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, | |
465 | unsigned long); | |
027445c3 BP |
466 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, |
467 | const struct iovec *iov, unsigned long nr_segs, | |
a564b8f0 | 468 | loff_t pos, bool uio); |
027445c3 BP |
469 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, |
470 | const struct iovec *iov, unsigned long nr_segs, | |
a564b8f0 | 471 | loff_t pos, bool uio); |
1da177e4 LT |
472 | |
473 | /* | |
474 | * linux/fs/nfs/dir.c | |
475 | */ | |
4b6f5d20 | 476 | extern const struct file_operations nfs_dir_operations; |
f786aa90 | 477 | extern const struct dentry_operations nfs_dentry_operations; |
1da177e4 | 478 | |
bfc69a45 | 479 | extern void nfs_force_lookup_revalidate(struct inode *dir); |
1775fd3e DQ |
480 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, |
481 | struct nfs_fattr *fattr, struct nfs4_label *label); | |
af22f94a TM |
482 | extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags); |
483 | extern void nfs_access_zap_cache(struct inode *inode); | |
1da177e4 LT |
484 | |
485 | /* | |
486 | * linux/fs/nfs/symlink.c | |
487 | */ | |
c5ef1c42 | 488 | extern const struct inode_operations nfs_symlink_inode_operations; |
1da177e4 | 489 | |
a72b4422 TM |
490 | /* |
491 | * linux/fs/nfs/sysctl.c | |
492 | */ | |
493 | #ifdef CONFIG_SYSCTL | |
494 | extern int nfs_register_sysctl(void); | |
495 | extern void nfs_unregister_sysctl(void); | |
496 | #else | |
7fd105e7 | 497 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
498 | #define nfs_unregister_sysctl() do { } while(0) |
499 | #endif | |
500 | ||
55a97593 TM |
501 | /* |
502 | * linux/fs/nfs/namespace.c | |
503 | */ | |
c5ef1c42 AV |
504 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
505 | extern const struct inode_operations nfs_referral_inode_operations; | |
51d8fa6a TM |
506 | extern int nfs_mountpoint_expiry_timeout; |
507 | extern void nfs_release_automount_timer(void); | |
55a97593 | 508 | |
e058f70b SD |
509 | /* |
510 | * linux/fs/nfs/nfs4proc.c | |
511 | */ | |
512 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL | |
513 | extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); | |
514 | static inline void nfs4_label_free(struct nfs4_label *label) | |
515 | { | |
516 | if (label) { | |
517 | kfree(label->label); | |
518 | kfree(label); | |
519 | } | |
520 | return; | |
521 | } | |
522 | #else | |
523 | static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } | |
524 | static inline void nfs4_label_free(void *label) {} | |
525 | #endif | |
526 | ||
1da177e4 LT |
527 | /* |
528 | * linux/fs/nfs/unlink.c | |
529 | */ | |
e4eff1a6 | 530 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); |
ba6c0592 | 531 | extern void nfs_wait_on_sillyrename(struct dentry *dentry); |
565277f6 TM |
532 | extern void nfs_block_sillyrename(struct dentry *dentry); |
533 | extern void nfs_unblock_sillyrename(struct dentry *dentry); | |
779c5179 | 534 | extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); |
1da177e4 LT |
535 | |
536 | /* | |
537 | * linux/fs/nfs/write.c | |
538 | */ | |
89a09141 | 539 | extern int nfs_congestion_kb; |
1da177e4 LT |
540 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
541 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
542 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
543 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
13602896 | 544 | extern void nfs_writeback_done(struct rpc_task *, struct nfs_write_data *); |
1da177e4 LT |
545 | |
546 | /* | |
547 | * Try to write back everything synchronously (but check the | |
548 | * return value!) | |
549 | */ | |
1c75950b TM |
550 | extern int nfs_wb_all(struct inode *inode); |
551 | extern int nfs_wb_page(struct inode *inode, struct page* page); | |
1b3b4a1a | 552 | extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); |
89d77c8f | 553 | #if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4) |
b608b283 | 554 | extern int nfs_commit_inode(struct inode *, int); |
0b7c0153 FI |
555 | extern struct nfs_commit_data *nfs_commitdata_alloc(void); |
556 | extern void nfs_commit_free(struct nfs_commit_data *data); | |
77a63f3d TM |
557 | #else |
558 | static inline int | |
559 | nfs_commit_inode(struct inode *inode, int how) | |
560 | { | |
561 | return 0; | |
562 | } | |
1da177e4 LT |
563 | #endif |
564 | ||
565 | static inline int | |
566 | nfs_have_writebacks(struct inode *inode) | |
567 | { | |
568 | return NFS_I(inode)->npages != 0; | |
569 | } | |
570 | ||
1da177e4 LT |
571 | /* |
572 | * linux/fs/nfs/read.c | |
573 | */ | |
574 | extern int nfs_readpage(struct file *, struct page *); | |
575 | extern int nfs_readpages(struct file *, struct address_space *, | |
576 | struct list_head *, unsigned); | |
ec06c096 | 577 | extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *); |
f42b293d DH |
578 | extern int nfs_readpage_async(struct nfs_open_context *, struct inode *, |
579 | struct page *); | |
963d8fe5 | 580 | |
b7fa0554 AG |
581 | /* |
582 | * linux/fs/nfs3proc.c | |
583 | */ | |
584 | #ifdef CONFIG_NFS_V3_ACL | |
585 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); | |
586 | extern int nfs3_proc_setacl(struct inode *inode, int type, | |
587 | struct posix_acl *acl); | |
055ffbea | 588 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
d3fb6120 | 589 | umode_t mode); |
5c6a9f7d | 590 | extern void nfs3_forget_cached_acls(struct inode *inode); |
055ffbea AG |
591 | #else |
592 | static inline int nfs3_proc_set_default_acl(struct inode *dir, | |
593 | struct inode *inode, | |
d3fb6120 | 594 | umode_t mode) |
055ffbea AG |
595 | { |
596 | return 0; | |
597 | } | |
5c6a9f7d AG |
598 | |
599 | static inline void nfs3_forget_cached_acls(struct inode *inode) | |
600 | { | |
601 | } | |
b7fa0554 AG |
602 | #endif /* CONFIG_NFS_V3_ACL */ |
603 | ||
1da177e4 LT |
604 | /* |
605 | * inline functions | |
606 | */ | |
607 | ||
433c9237 | 608 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
1da177e4 | 609 | { |
433c9237 CL |
610 | if (size > (__u64) OFFSET_MAX - 1) |
611 | return OFFSET_MAX - 1; | |
1da177e4 LT |
612 | return (loff_t) size; |
613 | } | |
614 | ||
615 | static inline ino_t | |
616 | nfs_fileid_to_ino_t(u64 fileid) | |
617 | { | |
618 | ino_t ino = (ino_t) fileid; | |
619 | if (sizeof(ino_t) < sizeof(u64)) | |
620 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
621 | return ino; | |
622 | } | |
623 | ||
1da177e4 LT |
624 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) |
625 | ||
4dc2eaec | 626 | |
1da177e4 LT |
627 | # undef ifdebug |
628 | # ifdef NFS_DEBUG | |
629 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
6f00866d | 630 | # define NFS_IFDEBUG(x) x |
1da177e4 LT |
631 | # else |
632 | # define ifdebug(fac) if (0) | |
6f00866d | 633 | # define NFS_IFDEBUG(x) |
1da177e4 | 634 | # endif |
1da177e4 | 635 | #endif |