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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 | */ | |
8 | #ifndef _LINUX_NFS_FS_H | |
9 | #define _LINUX_NFS_FS_H | |
10 | ||
11 | #include <uapi/linux/nfs_fs.h> | |
12 | ||
13 | ||
14 | /* | |
15 | * Enable dprintk() debugging support for nfs client. | |
16 | */ | |
17 | #ifdef CONFIG_NFS_DEBUG | |
18 | # define NFS_DEBUG | |
19 | #endif | |
20 | ||
21 | #include <linux/in.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/pagemap.h> | |
24 | #include <linux/rbtree.h> | |
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> | |
37 | #include <linux/nfs_fs_sb.h> | |
38 | ||
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 | ||
46 | /* | |
47 | * NFSv3/v4 Access mode cache entry | |
48 | */ | |
49 | struct nfs_access_entry { | |
50 | struct rb_node rb_node; | |
51 | struct list_head lru; | |
52 | unsigned long jiffies; | |
53 | struct rpc_cred * cred; | |
54 | int mask; | |
55 | }; | |
56 | ||
57 | struct nfs_lockowner { | |
58 | fl_owner_t l_owner; | |
59 | pid_t l_pid; | |
60 | }; | |
61 | ||
62 | #define NFS_IO_INPROGRESS 0 | |
63 | struct nfs_io_counter { | |
64 | unsigned long flags; | |
65 | atomic_t io_count; | |
66 | }; | |
67 | ||
68 | struct nfs_lock_context { | |
69 | atomic_t count; | |
70 | struct list_head list; | |
71 | struct nfs_open_context *open_context; | |
72 | struct nfs_lockowner lockowner; | |
73 | struct nfs_io_counter io_count; | |
74 | }; | |
75 | ||
76 | struct nfs4_state; | |
77 | struct nfs_open_context { | |
78 | struct nfs_lock_context lock_context; | |
79 | struct dentry *dentry; | |
80 | struct rpc_cred *cred; | |
81 | struct nfs4_state *state; | |
82 | fmode_t mode; | |
83 | ||
84 | unsigned long flags; | |
85 | #define NFS_CONTEXT_ERROR_WRITE (0) | |
86 | #define NFS_CONTEXT_RESEND_WRITES (1) | |
87 | #define NFS_CONTEXT_BAD (2) | |
88 | int error; | |
89 | ||
90 | struct list_head list; | |
91 | struct nfs4_threshold *mdsthreshold; | |
92 | }; | |
93 | ||
94 | struct nfs_open_dir_context { | |
95 | struct rpc_cred *cred; | |
96 | unsigned long attr_gencount; | |
97 | __u64 dir_cookie; | |
98 | __u64 dup_cookie; | |
99 | signed char duped; | |
100 | }; | |
101 | ||
102 | /* | |
103 | * NFSv4 delegation | |
104 | */ | |
105 | struct nfs_delegation; | |
106 | ||
107 | struct posix_acl; | |
108 | ||
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 | */ | |
126 | unsigned long flags; /* atomic bit ops */ | |
127 | unsigned long cache_validity; /* bit mask */ | |
128 | ||
129 | /* | |
130 | * read_cache_jiffies is when we started read-caching this inode. | |
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 | * | |
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. | |
142 | */ | |
143 | unsigned long read_cache_jiffies; | |
144 | unsigned long attrtimeo; | |
145 | unsigned long attrtimeo_timestamp; | |
146 | ||
147 | unsigned long attr_gencount; | |
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; | |
153 | ||
154 | struct rb_root access_cache; | |
155 | struct list_head access_cache_entry_lru; | |
156 | struct list_head access_cache_inode_lru; | |
157 | #ifdef CONFIG_NFS_V3_ACL | |
158 | struct posix_acl *acl_access; | |
159 | struct posix_acl *acl_default; | |
160 | #endif | |
161 | ||
162 | /* | |
163 | * This is the cookie verifier used for NFSv3 readdir | |
164 | * operations | |
165 | */ | |
166 | __be32 cookieverf[2]; | |
167 | ||
168 | unsigned long npages; | |
169 | struct nfs_mds_commit_info commit_info; | |
170 | ||
171 | /* Open contexts for shared mmap writes */ | |
172 | struct list_head open_files; | |
173 | ||
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 | ||
180 | #if IS_ENABLED(CONFIG_NFS_V4) | |
181 | struct nfs4_cached_acl *nfs4_acl; | |
182 | /* NFSv4 state */ | |
183 | struct list_head open_states; | |
184 | struct nfs_delegation __rcu *delegation; | |
185 | fmode_t delegation_state; | |
186 | struct rw_semaphore rwsem; | |
187 | ||
188 | /* pNFS layout information */ | |
189 | struct pnfs_layout_hdr *layout; | |
190 | #endif /* CONFIG_NFS_V4*/ | |
191 | /* how many bytes have been written/read and how many bytes queued up */ | |
192 | __u64 write_io; | |
193 | __u64 read_io; | |
194 | #ifdef CONFIG_NFS_FSCACHE | |
195 | struct fscache_cookie *fscache; | |
196 | #endif | |
197 | struct inode vfs_inode; | |
198 | }; | |
199 | ||
200 | /* | |
201 | * Cache validity bit flags | |
202 | */ | |
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 */ | |
209 | #define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */ | |
210 | ||
211 | /* | |
212 | * Bit offsets in flags field | |
213 | */ | |
214 | #define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */ | |
215 | #define NFS_INO_STALE (1) /* possible stale inode */ | |
216 | #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ | |
217 | #define NFS_INO_FLUSHING (4) /* inode is flushing out data */ | |
218 | #define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ | |
219 | #define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */ | |
220 | #define NFS_INO_COMMIT (7) /* inode is committing unstable writes */ | |
221 | #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ | |
222 | #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ | |
223 | ||
224 | static inline struct nfs_inode *NFS_I(const struct inode *inode) | |
225 | { | |
226 | return container_of(inode, struct nfs_inode, vfs_inode); | |
227 | } | |
228 | ||
229 | static inline struct nfs_server *NFS_SB(const struct super_block *s) | |
230 | { | |
231 | return (struct nfs_server *)(s->s_fs_info); | |
232 | } | |
233 | ||
234 | static inline struct nfs_fh *NFS_FH(const struct inode *inode) | |
235 | { | |
236 | return &NFS_I(inode)->fh; | |
237 | } | |
238 | ||
239 | static inline struct nfs_server *NFS_SERVER(const struct inode *inode) | |
240 | { | |
241 | return NFS_SB(inode->i_sb); | |
242 | } | |
243 | ||
244 | static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) | |
245 | { | |
246 | return NFS_SERVER(inode)->client; | |
247 | } | |
248 | ||
249 | static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) | |
250 | { | |
251 | return NFS_SERVER(inode)->nfs_client->rpc_ops; | |
252 | } | |
253 | ||
254 | static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) | |
255 | { | |
256 | struct nfs_server *nfss = NFS_SERVER(inode); | |
257 | return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; | |
258 | } | |
259 | ||
260 | static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) | |
261 | { | |
262 | struct nfs_server *nfss = NFS_SERVER(inode); | |
263 | return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; | |
264 | } | |
265 | ||
266 | static inline int NFS_STALE(const struct inode *inode) | |
267 | { | |
268 | return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); | |
269 | } | |
270 | ||
271 | static inline int NFS_FSCACHE(const struct inode *inode) | |
272 | { | |
273 | return test_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags); | |
274 | } | |
275 | ||
276 | static inline __u64 NFS_FILEID(const struct inode *inode) | |
277 | { | |
278 | return NFS_I(inode)->fileid; | |
279 | } | |
280 | ||
281 | static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) | |
282 | { | |
283 | NFS_I(inode)->fileid = fileid; | |
284 | } | |
285 | ||
286 | static inline void nfs_mark_for_revalidate(struct inode *inode) | |
287 | { | |
288 | struct nfs_inode *nfsi = NFS_I(inode); | |
289 | ||
290 | spin_lock(&inode->i_lock); | |
291 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS; | |
292 | if (S_ISDIR(inode->i_mode)) | |
293 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; | |
294 | spin_unlock(&inode->i_lock); | |
295 | } | |
296 | ||
297 | static inline int nfs_server_capable(struct inode *inode, int cap) | |
298 | { | |
299 | return NFS_SERVER(inode)->caps & cap; | |
300 | } | |
301 | ||
302 | static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) | |
303 | { | |
304 | dentry->d_time = verf; | |
305 | } | |
306 | ||
307 | /** | |
308 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
309 | * @dir - pointer to parent directory inode | |
310 | * The "change attribute" is updated every time we finish an operation | |
311 | * that will result in a metadata change on the server. | |
312 | */ | |
313 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) | |
314 | { | |
315 | return NFS_I(dir)->cache_change_attribute; | |
316 | } | |
317 | ||
318 | /** | |
319 | * nfs_verify_change_attribute - Detects NFS remote directory changes | |
320 | * @dir - pointer to parent directory inode | |
321 | * @chattr - previously saved change attribute | |
322 | * Return "false" if the verifiers doesn't match the change attribute. | |
323 | * This would usually indicate that the directory contents have changed on | |
324 | * the server, and that any dentries need revalidating. | |
325 | */ | |
326 | static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr) | |
327 | { | |
328 | return chattr == NFS_I(dir)->cache_change_attribute; | |
329 | } | |
330 | ||
331 | /* | |
332 | * linux/fs/nfs/inode.c | |
333 | */ | |
334 | extern int nfs_sync_mapping(struct address_space *mapping); | |
335 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); | |
336 | extern void nfs_zap_caches(struct inode *); | |
337 | extern void nfs_invalidate_atime(struct inode *); | |
338 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, | |
339 | struct nfs_fattr *); | |
340 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); | |
341 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); | |
342 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); | |
343 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); | |
344 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); | |
345 | extern void nfs_access_set_mask(struct nfs_access_entry *, u32); | |
346 | extern int nfs_permission(struct inode *, int); | |
347 | extern int nfs_open(struct inode *, struct file *); | |
348 | extern int nfs_release(struct inode *, struct file *); | |
349 | extern int nfs_attribute_timeout(struct inode *inode); | |
350 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); | |
351 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
352 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); | |
353 | extern int nfs_setattr(struct dentry *, struct iattr *); | |
354 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); | |
355 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); | |
356 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
357 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode); | |
358 | extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode); | |
359 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); | |
360 | extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); | |
361 | extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); | |
362 | extern u64 nfs_compat_user_ino64(u64 fileid); | |
363 | extern void nfs_fattr_init(struct nfs_fattr *fattr); | |
364 | extern unsigned long nfs_inc_attr_generation_counter(void); | |
365 | ||
366 | extern struct nfs_fattr *nfs_alloc_fattr(void); | |
367 | ||
368 | static inline void nfs_free_fattr(const struct nfs_fattr *fattr) | |
369 | { | |
370 | kfree(fattr); | |
371 | } | |
372 | ||
373 | extern struct nfs_fh *nfs_alloc_fhandle(void); | |
374 | ||
375 | static inline void nfs_free_fhandle(const struct nfs_fh *fh) | |
376 | { | |
377 | kfree(fh); | |
378 | } | |
379 | ||
380 | #ifdef NFS_DEBUG | |
381 | extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh); | |
382 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
383 | { | |
384 | return _nfs_display_fhandle_hash(fh); | |
385 | } | |
386 | extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption); | |
387 | #define nfs_display_fhandle(fh, caption) \ | |
388 | do { \ | |
389 | if (unlikely(nfs_debug & NFSDBG_FACILITY)) \ | |
390 | _nfs_display_fhandle(fh, caption); \ | |
391 | } while (0) | |
392 | #else | |
393 | static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
394 | { | |
395 | return 0; | |
396 | } | |
397 | static inline void nfs_display_fhandle(const struct nfs_fh *fh, | |
398 | const char *caption) | |
399 | { | |
400 | } | |
401 | #endif | |
402 | ||
403 | /* | |
404 | * linux/fs/nfs/nfsroot.c | |
405 | */ | |
406 | extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ | |
407 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ | |
408 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ | |
409 | ||
410 | /* | |
411 | * linux/fs/nfs/file.c | |
412 | */ | |
413 | extern const struct file_operations nfs_file_operations; | |
414 | #if IS_ENABLED(CONFIG_NFS_V4) | |
415 | extern const struct file_operations nfs4_file_operations; | |
416 | #endif /* CONFIG_NFS_V4 */ | |
417 | extern const struct address_space_operations nfs_file_aops; | |
418 | extern const struct address_space_operations nfs_dir_aops; | |
419 | ||
420 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) | |
421 | { | |
422 | return filp->private_data; | |
423 | } | |
424 | ||
425 | static inline struct rpc_cred *nfs_file_cred(struct file *file) | |
426 | { | |
427 | if (file != NULL) { | |
428 | struct nfs_open_context *ctx = | |
429 | nfs_file_open_context(file); | |
430 | if (ctx) | |
431 | return ctx->cred; | |
432 | } | |
433 | return NULL; | |
434 | } | |
435 | ||
436 | /* | |
437 | * linux/fs/nfs/xattr.c | |
438 | */ | |
439 | #ifdef CONFIG_NFS_V3_ACL | |
440 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); | |
441 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); | |
442 | extern int nfs3_setxattr(struct dentry *, const char *, | |
443 | const void *, size_t, int); | |
444 | extern int nfs3_removexattr (struct dentry *, const char *name); | |
445 | #else | |
446 | # define nfs3_listxattr NULL | |
447 | # define nfs3_getxattr NULL | |
448 | # define nfs3_setxattr NULL | |
449 | # define nfs3_removexattr NULL | |
450 | #endif | |
451 | ||
452 | /* | |
453 | * linux/fs/nfs/direct.c | |
454 | */ | |
455 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, | |
456 | unsigned long); | |
457 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, | |
458 | const struct iovec *iov, unsigned long nr_segs, | |
459 | loff_t pos, bool uio); | |
460 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, | |
461 | const struct iovec *iov, unsigned long nr_segs, | |
462 | loff_t pos, bool uio); | |
463 | ||
464 | /* | |
465 | * linux/fs/nfs/dir.c | |
466 | */ | |
467 | extern const struct file_operations nfs_dir_operations; | |
468 | extern const struct dentry_operations nfs_dentry_operations; | |
469 | ||
470 | extern void nfs_force_lookup_revalidate(struct inode *dir); | |
471 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); | |
472 | extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags); | |
473 | extern void nfs_access_zap_cache(struct inode *inode); | |
474 | ||
475 | /* | |
476 | * linux/fs/nfs/symlink.c | |
477 | */ | |
478 | extern const struct inode_operations nfs_symlink_inode_operations; | |
479 | ||
480 | /* | |
481 | * linux/fs/nfs/sysctl.c | |
482 | */ | |
483 | #ifdef CONFIG_SYSCTL | |
484 | extern int nfs_register_sysctl(void); | |
485 | extern void nfs_unregister_sysctl(void); | |
486 | #else | |
487 | #define nfs_register_sysctl() 0 | |
488 | #define nfs_unregister_sysctl() do { } while(0) | |
489 | #endif | |
490 | ||
491 | /* | |
492 | * linux/fs/nfs/namespace.c | |
493 | */ | |
494 | extern const struct inode_operations nfs_mountpoint_inode_operations; | |
495 | extern const struct inode_operations nfs_referral_inode_operations; | |
496 | extern int nfs_mountpoint_expiry_timeout; | |
497 | extern void nfs_release_automount_timer(void); | |
498 | ||
499 | /* | |
500 | * linux/fs/nfs/nfs4proc.c | |
501 | */ | |
502 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL | |
503 | extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); | |
504 | static inline void nfs4_label_free(struct nfs4_label *label) | |
505 | { | |
506 | if (label) { | |
507 | kfree(label->label); | |
508 | kfree(label); | |
509 | } | |
510 | return; | |
511 | } | |
512 | #else | |
513 | static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } | |
514 | static inline void nfs4_label_free(void *label) {} | |
515 | #endif | |
516 | ||
517 | /* | |
518 | * linux/fs/nfs/unlink.c | |
519 | */ | |
520 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); | |
521 | extern void nfs_block_sillyrename(struct dentry *dentry); | |
522 | extern void nfs_unblock_sillyrename(struct dentry *dentry); | |
523 | extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); | |
524 | ||
525 | /* | |
526 | * linux/fs/nfs/write.c | |
527 | */ | |
528 | extern int nfs_congestion_kb; | |
529 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); | |
530 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
531 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
532 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
533 | extern void nfs_writeback_done(struct rpc_task *, struct nfs_write_data *); | |
534 | ||
535 | /* | |
536 | * Try to write back everything synchronously (but check the | |
537 | * return value!) | |
538 | */ | |
539 | extern int nfs_wb_all(struct inode *inode); | |
540 | extern int nfs_wb_page(struct inode *inode, struct page* page); | |
541 | extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); | |
542 | #if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4) | |
543 | extern int nfs_commit_inode(struct inode *, int); | |
544 | extern struct nfs_commit_data *nfs_commitdata_alloc(void); | |
545 | extern void nfs_commit_free(struct nfs_commit_data *data); | |
546 | #else | |
547 | static inline int | |
548 | nfs_commit_inode(struct inode *inode, int how) | |
549 | { | |
550 | return 0; | |
551 | } | |
552 | #endif | |
553 | ||
554 | static inline int | |
555 | nfs_have_writebacks(struct inode *inode) | |
556 | { | |
557 | return NFS_I(inode)->npages != 0; | |
558 | } | |
559 | ||
560 | /* | |
561 | * linux/fs/nfs/read.c | |
562 | */ | |
563 | extern int nfs_readpage(struct file *, struct page *); | |
564 | extern int nfs_readpages(struct file *, struct address_space *, | |
565 | struct list_head *, unsigned); | |
566 | extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *); | |
567 | extern int nfs_readpage_async(struct nfs_open_context *, struct inode *, | |
568 | struct page *); | |
569 | ||
570 | /* | |
571 | * linux/fs/nfs3proc.c | |
572 | */ | |
573 | #ifdef CONFIG_NFS_V3_ACL | |
574 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); | |
575 | extern int nfs3_proc_setacl(struct inode *inode, int type, | |
576 | struct posix_acl *acl); | |
577 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, | |
578 | umode_t mode); | |
579 | extern void nfs3_forget_cached_acls(struct inode *inode); | |
580 | #else | |
581 | static inline int nfs3_proc_set_default_acl(struct inode *dir, | |
582 | struct inode *inode, | |
583 | umode_t mode) | |
584 | { | |
585 | return 0; | |
586 | } | |
587 | ||
588 | static inline void nfs3_forget_cached_acls(struct inode *inode) | |
589 | { | |
590 | } | |
591 | #endif /* CONFIG_NFS_V3_ACL */ | |
592 | ||
593 | /* | |
594 | * inline functions | |
595 | */ | |
596 | ||
597 | static inline loff_t nfs_size_to_loff_t(__u64 size) | |
598 | { | |
599 | if (size > (__u64) OFFSET_MAX - 1) | |
600 | return OFFSET_MAX - 1; | |
601 | return (loff_t) size; | |
602 | } | |
603 | ||
604 | static inline ino_t | |
605 | nfs_fileid_to_ino_t(u64 fileid) | |
606 | { | |
607 | ino_t ino = (ino_t) fileid; | |
608 | if (sizeof(ino_t) < sizeof(u64)) | |
609 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
610 | return ino; | |
611 | } | |
612 | ||
613 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) | |
614 | ||
615 | ||
616 | # undef ifdebug | |
617 | # ifdef NFS_DEBUG | |
618 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
619 | # define NFS_IFDEBUG(x) x | |
620 | # else | |
621 | # define ifdebug(fac) if (0) | |
622 | # define NFS_IFDEBUG(x) | |
623 | # endif | |
624 | #endif |