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
9 #ifndef _LINUX_NFS_FS_H
10 #define _LINUX_NFS_FS_H
11
12 #include <linux/magic.h>
13
14 /* Default timeout values */
15 #define NFS_DEF_UDP_TIMEO (11)
16 #define NFS_DEF_UDP_RETRANS (3)
17 #define NFS_DEF_TCP_TIMEO (600)
18 #define NFS_DEF_TCP_RETRANS (2)
19
20 #define NFS_MAX_UDP_TIMEOUT (60*HZ)
21 #define NFS_MAX_TCP_TIMEOUT (600*HZ)
22
23 #define NFS_DEF_ACREGMIN (3)
24 #define NFS_DEF_ACREGMAX (60)
25 #define NFS_DEF_ACDIRMIN (30)
26 #define NFS_DEF_ACDIRMAX (60)
27
28 /*
29 * When flushing a cluster of dirty pages, there can be different
30 * strategies:
31 */
32 #define FLUSH_SYNC 1 /* file being synced, or contention */
33 #define FLUSH_STABLE 4 /* commit to stable storage */
34 #define FLUSH_LOWPRI 8 /* low priority background flush */
35 #define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */
36 #define FLUSH_COND_STABLE 32 /* conditional stable write - only stable
37 * if everything fits in one RPC */
38
39 #ifdef __KERNEL__
40
41 /*
42 * Enable dprintk() debugging support for nfs client.
43 */
44 #ifdef CONFIG_NFS_DEBUG
45 # define NFS_DEBUG
46 #endif
47
48 #include <linux/in.h>
49 #include <linux/mm.h>
50 #include <linux/pagemap.h>
51 #include <linux/rbtree.h>
52 #include <linux/rwsem.h>
53 #include <linux/wait.h>
54
55 #include <linux/sunrpc/debug.h>
56 #include <linux/sunrpc/auth.h>
57 #include <linux/sunrpc/clnt.h>
58
59 #include <linux/nfs.h>
60 #include <linux/nfs2.h>
61 #include <linux/nfs3.h>
62 #include <linux/nfs4.h>
63 #include <linux/nfs_xdr.h>
64 #include <linux/nfs_fs_sb.h>
65
66 #include <linux/mempool.h>
67
68 /*
69 * These are the default flags for swap requests
70 */
71 #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
72
73 /*
74 * NFSv3/v4 Access mode cache entry
75 */
76 struct nfs_access_entry {
77 struct rb_node rb_node;
78 struct list_head lru;
79 unsigned long jiffies;
80 struct rpc_cred * cred;
81 int mask;
82 };
83
84 struct nfs_lock_context {
85 atomic_t count;
86 struct list_head list;
87 struct nfs_open_context *open_context;
88 fl_owner_t lockowner;
89 pid_t pid;
90 };
91
92 struct nfs4_state;
93 struct nfs_open_context {
94 struct nfs_lock_context lock_context;
95 struct dentry *dentry;
96 struct rpc_cred *cred;
97 struct nfs4_state *state;
98 fmode_t mode;
99
100 unsigned long flags;
101 #define NFS_CONTEXT_ERROR_WRITE (0)
102 int error;
103
104 struct list_head list;
105 };
106
107 struct nfs_open_dir_context {
108 struct rpc_cred *cred;
109 unsigned long attr_gencount;
110 __u64 dir_cookie;
111 __u64 dup_cookie;
112 signed char duped;
113 };
114
115 /*
116 * NFSv4 delegation
117 */
118 struct nfs_delegation;
119
120 struct posix_acl;
121
122 /*
123 * nfs fs inode data in memory
124 */
125 struct nfs_inode {
126 /*
127 * The 64bit 'inode number'
128 */
129 __u64 fileid;
130
131 /*
132 * NFS file handle
133 */
134 struct nfs_fh fh;
135
136 /*
137 * Various flags
138 */
139 unsigned long flags; /* atomic bit ops */
140 unsigned long cache_validity; /* bit mask */
141
142 /*
143 * read_cache_jiffies is when we started read-caching this inode.
144 * attrtimeo is for how long the cached information is assumed
145 * to be valid. A successful attribute revalidation doubles
146 * attrtimeo (up to acregmax/acdirmax), a failure resets it to
147 * acregmin/acdirmin.
148 *
149 * We need to revalidate the cached attrs for this inode if
150 *
151 * jiffies - read_cache_jiffies >= attrtimeo
152 *
153 * Please note the comparison is greater than or equal
154 * so that zero timeout values can be specified.
155 */
156 unsigned long read_cache_jiffies;
157 unsigned long attrtimeo;
158 unsigned long attrtimeo_timestamp;
159
160 unsigned long attr_gencount;
161 /* "Generation counter" for the attribute cache. This is
162 * bumped whenever we update the metadata on the
163 * server.
164 */
165 unsigned long cache_change_attribute;
166
167 struct rb_root access_cache;
168 struct list_head access_cache_entry_lru;
169 struct list_head access_cache_inode_lru;
170 #ifdef CONFIG_NFS_V3_ACL
171 struct posix_acl *acl_access;
172 struct posix_acl *acl_default;
173 #endif
174
175 /*
176 * This is the cookie verifier used for NFSv3 readdir
177 * operations
178 */
179 __be32 cookieverf[2];
180
181 unsigned long npages;
182 unsigned long ncommit;
183 struct list_head commit_list;
184
185 /* Open contexts for shared mmap writes */
186 struct list_head open_files;
187
188 /* Number of in-flight sillydelete RPC calls */
189 atomic_t silly_count;
190 /* List of deferred sillydelete requests */
191 struct hlist_head silly_list;
192 wait_queue_head_t waitqueue;
193
194 #ifdef CONFIG_NFS_V4
195 struct nfs4_cached_acl *nfs4_acl;
196 /* NFSv4 state */
197 struct list_head open_states;
198 struct nfs_delegation __rcu *delegation;
199 fmode_t delegation_state;
200 struct rw_semaphore rwsem;
201
202 /* pNFS layout information */
203 struct pnfs_layout_hdr *layout;
204 atomic_t commits_outstanding;
205 #endif /* CONFIG_NFS_V4*/
206 #ifdef CONFIG_NFS_FSCACHE
207 struct fscache_cookie *fscache;
208 #endif
209 struct inode vfs_inode;
210 };
211
212 /*
213 * Cache validity bit flags
214 */
215 #define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */
216 #define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */
217 #define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */
218 #define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */
219 #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */
220 #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */
221 #define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */
222
223 /*
224 * Bit offsets in flags field
225 */
226 #define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */
227 #define NFS_INO_STALE (1) /* possible stale inode */
228 #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */
229 #define NFS_INO_FLUSHING (4) /* inode is flushing out data */
230 #define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */
231 #define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */
232 #define NFS_INO_COMMIT (7) /* inode is committing unstable writes */
233 #define NFS_INO_PNFS_COMMIT (8) /* use pnfs code for commit */
234 #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */
235 #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */
236
NFS_I(const struct inode * inode)237 static inline struct nfs_inode *NFS_I(const struct inode *inode)
238 {
239 return container_of(inode, struct nfs_inode, vfs_inode);
240 }
241
NFS_SB(const struct super_block * s)242 static inline struct nfs_server *NFS_SB(const struct super_block *s)
243 {
244 return (struct nfs_server *)(s->s_fs_info);
245 }
246
NFS_FH(const struct inode * inode)247 static inline struct nfs_fh *NFS_FH(const struct inode *inode)
248 {
249 return &NFS_I(inode)->fh;
250 }
251
NFS_SERVER(const struct inode * inode)252 static inline struct nfs_server *NFS_SERVER(const struct inode *inode)
253 {
254 return NFS_SB(inode->i_sb);
255 }
256
NFS_CLIENT(const struct inode * inode)257 static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode)
258 {
259 return NFS_SERVER(inode)->client;
260 }
261
NFS_PROTO(const struct inode * inode)262 static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode)
263 {
264 return NFS_SERVER(inode)->nfs_client->rpc_ops;
265 }
266
NFS_MINATTRTIMEO(const struct inode * inode)267 static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode)
268 {
269 struct nfs_server *nfss = NFS_SERVER(inode);
270 return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin;
271 }
272
NFS_MAXATTRTIMEO(const struct inode * inode)273 static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode)
274 {
275 struct nfs_server *nfss = NFS_SERVER(inode);
276 return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax;
277 }
278
NFS_STALE(const struct inode * inode)279 static inline int NFS_STALE(const struct inode *inode)
280 {
281 return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
282 }
283
NFS_FSCACHE(const struct inode * inode)284 static inline int NFS_FSCACHE(const struct inode *inode)
285 {
286 return test_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags);
287 }
288
NFS_FILEID(const struct inode * inode)289 static inline __u64 NFS_FILEID(const struct inode *inode)
290 {
291 return NFS_I(inode)->fileid;
292 }
293
set_nfs_fileid(struct inode * inode,__u64 fileid)294 static inline void set_nfs_fileid(struct inode *inode, __u64 fileid)
295 {
296 NFS_I(inode)->fileid = fileid;
297 }
298
nfs_mark_for_revalidate(struct inode * inode)299 static inline void nfs_mark_for_revalidate(struct inode *inode)
300 {
301 struct nfs_inode *nfsi = NFS_I(inode);
302
303 spin_lock(&inode->i_lock);
304 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS;
305 if (S_ISDIR(inode->i_mode))
306 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
307 spin_unlock(&inode->i_lock);
308 }
309
nfs_server_capable(struct inode * inode,int cap)310 static inline int nfs_server_capable(struct inode *inode, int cap)
311 {
312 return NFS_SERVER(inode)->caps & cap;
313 }
314
NFS_USE_READDIRPLUS(struct inode * inode)315 static inline int NFS_USE_READDIRPLUS(struct inode *inode)
316 {
317 return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
318 }
319
nfs_set_verifier(struct dentry * dentry,unsigned long verf)320 static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf)
321 {
322 dentry->d_time = verf;
323 }
324
325 /**
326 * nfs_save_change_attribute - Returns the inode attribute change cookie
327 * @dir - pointer to parent directory inode
328 * The "change attribute" is updated every time we finish an operation
329 * that will result in a metadata change on the server.
330 */
nfs_save_change_attribute(struct inode * dir)331 static inline unsigned long nfs_save_change_attribute(struct inode *dir)
332 {
333 return NFS_I(dir)->cache_change_attribute;
334 }
335
336 /**
337 * nfs_verify_change_attribute - Detects NFS remote directory changes
338 * @dir - pointer to parent directory inode
339 * @chattr - previously saved change attribute
340 * Return "false" if the verifiers doesn't match the change attribute.
341 * This would usually indicate that the directory contents have changed on
342 * the server, and that any dentries need revalidating.
343 */
nfs_verify_change_attribute(struct inode * dir,unsigned long chattr)344 static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr)
345 {
346 return chattr == NFS_I(dir)->cache_change_attribute;
347 }
348
349 /*
350 * linux/fs/nfs/inode.c
351 */
352 extern int nfs_sync_mapping(struct address_space *mapping);
353 extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping);
354 extern void nfs_zap_caches(struct inode *);
355 extern void nfs_invalidate_atime(struct inode *);
356 extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
357 struct nfs_fattr *);
358 extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
359 extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
360 extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);
361 extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
362 extern int nfs_permission(struct inode *, int);
363 extern int nfs_open(struct inode *, struct file *);
364 extern int nfs_release(struct inode *, struct file *);
365 extern int nfs_attribute_timeout(struct inode *inode);
366 extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
367 extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
368 extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
369 extern int nfs_setattr(struct dentry *, struct iattr *);
370 extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
371 extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
372 extern void put_nfs_open_context(struct nfs_open_context *ctx);
373 extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode);
374 extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode);
375 extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx);
376 extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx);
377 extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx);
378 extern u64 nfs_compat_user_ino64(u64 fileid);
379 extern void nfs_fattr_init(struct nfs_fattr *fattr);
380 extern unsigned long nfs_inc_attr_generation_counter(void);
381
382 extern struct nfs_fattr *nfs_alloc_fattr(void);
383
nfs_free_fattr(const struct nfs_fattr * fattr)384 static inline void nfs_free_fattr(const struct nfs_fattr *fattr)
385 {
386 kfree(fattr);
387 }
388
389 extern struct nfs_fh *nfs_alloc_fhandle(void);
390
nfs_free_fhandle(const struct nfs_fh * fh)391 static inline void nfs_free_fhandle(const struct nfs_fh *fh)
392 {
393 kfree(fh);
394 }
395
396 #ifdef NFS_DEBUG
397 extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh);
nfs_display_fhandle_hash(const struct nfs_fh * fh)398 static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
399 {
400 return _nfs_display_fhandle_hash(fh);
401 }
402 extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption);
403 #define nfs_display_fhandle(fh, caption) \
404 do { \
405 if (unlikely(nfs_debug & NFSDBG_FACILITY)) \
406 _nfs_display_fhandle(fh, caption); \
407 } while (0)
408 #else
nfs_display_fhandle_hash(const struct nfs_fh * fh)409 static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
410 {
411 return 0;
412 }
nfs_display_fhandle(const struct nfs_fh * fh,const char * caption)413 static inline void nfs_display_fhandle(const struct nfs_fh *fh,
414 const char *caption)
415 {
416 }
417 #endif
418
419 /*
420 * linux/fs/nfs/nfsroot.c
421 */
422 extern int nfs_root_data(char **root_device, char **root_data); /*__init*/
423 /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
424 extern __be32 root_nfs_parse_addr(char *name); /*__init*/
425
426 /*
427 * linux/fs/nfs/file.c
428 */
429 extern const struct inode_operations nfs_file_inode_operations;
430 #ifdef CONFIG_NFS_V3
431 extern const struct inode_operations nfs3_file_inode_operations;
432 #endif /* CONFIG_NFS_V3 */
433 extern const struct file_operations nfs_file_operations;
434 #ifdef CONFIG_NFS_V4
435 extern const struct file_operations nfs4_file_operations;
436 #endif /* CONFIG_NFS_V4 */
437 extern const struct address_space_operations nfs_file_aops;
438 extern const struct address_space_operations nfs_dir_aops;
439
nfs_file_open_context(struct file * filp)440 static inline struct nfs_open_context *nfs_file_open_context(struct file *filp)
441 {
442 return filp->private_data;
443 }
444
nfs_file_cred(struct file * file)445 static inline struct rpc_cred *nfs_file_cred(struct file *file)
446 {
447 if (file != NULL) {
448 struct nfs_open_context *ctx =
449 nfs_file_open_context(file);
450 if (ctx)
451 return ctx->cred;
452 }
453 return NULL;
454 }
455
456 /*
457 * linux/fs/nfs/xattr.c
458 */
459 #ifdef CONFIG_NFS_V3_ACL
460 extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
461 extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
462 extern int nfs3_setxattr(struct dentry *, const char *,
463 const void *, size_t, int);
464 extern int nfs3_removexattr (struct dentry *, const char *name);
465 #else
466 # define nfs3_listxattr NULL
467 # define nfs3_getxattr NULL
468 # define nfs3_setxattr NULL
469 # define nfs3_removexattr NULL
470 #endif
471
472 /*
473 * linux/fs/nfs/direct.c
474 */
475 extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
476 unsigned long);
477 extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
478 const struct iovec *iov, unsigned long nr_segs,
479 loff_t pos);
480 extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
481 const struct iovec *iov, unsigned long nr_segs,
482 loff_t pos);
483
484 /*
485 * linux/fs/nfs/dir.c
486 */
487 extern const struct inode_operations nfs_dir_inode_operations;
488 #ifdef CONFIG_NFS_V3
489 extern const struct inode_operations nfs3_dir_inode_operations;
490 #endif /* CONFIG_NFS_V3 */
491 extern const struct file_operations nfs_dir_operations;
492 extern const struct dentry_operations nfs_dentry_operations;
493
494 extern void nfs_force_lookup_revalidate(struct inode *dir);
495 extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
496 extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags);
497 extern void nfs_access_zap_cache(struct inode *inode);
498
499 /*
500 * linux/fs/nfs/symlink.c
501 */
502 extern const struct inode_operations nfs_symlink_inode_operations;
503
504 /*
505 * linux/fs/nfs/sysctl.c
506 */
507 #ifdef CONFIG_SYSCTL
508 extern int nfs_register_sysctl(void);
509 extern void nfs_unregister_sysctl(void);
510 #else
511 #define nfs_register_sysctl() 0
512 #define nfs_unregister_sysctl() do { } while(0)
513 #endif
514
515 /*
516 * linux/fs/nfs/namespace.c
517 */
518 extern const struct inode_operations nfs_mountpoint_inode_operations;
519 extern const struct inode_operations nfs_referral_inode_operations;
520 extern int nfs_mountpoint_expiry_timeout;
521 extern void nfs_release_automount_timer(void);
522
523 /*
524 * linux/fs/nfs/unlink.c
525 */
526 extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
527 extern void nfs_block_sillyrename(struct dentry *dentry);
528 extern void nfs_unblock_sillyrename(struct dentry *dentry);
529 extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
530
531 /*
532 * linux/fs/nfs/write.c
533 */
534 extern int nfs_congestion_kb;
535 extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
536 extern int nfs_writepages(struct address_space *, struct writeback_control *);
537 extern int nfs_flush_incompatible(struct file *file, struct page *page);
538 extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
539 extern void nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
540
541 /*
542 * Try to write back everything synchronously (but check the
543 * return value!)
544 */
545 extern int nfs_wb_all(struct inode *inode);
546 extern int nfs_wb_page(struct inode *inode, struct page* page);
547 extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
548 #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
549 extern int nfs_commit_inode(struct inode *, int);
550 extern struct nfs_write_data *nfs_commitdata_alloc(void);
551 extern void nfs_commit_free(struct nfs_write_data *wdata);
552 #else
553 static inline int
nfs_commit_inode(struct inode * inode,int how)554 nfs_commit_inode(struct inode *inode, int how)
555 {
556 return 0;
557 }
558 #endif
559
560 static inline int
nfs_have_writebacks(struct inode * inode)561 nfs_have_writebacks(struct inode *inode)
562 {
563 return NFS_I(inode)->npages != 0;
564 }
565
566 /*
567 * Allocate nfs_write_data structures
568 */
569 extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages);
570 extern void nfs_writedata_free(struct nfs_write_data *);
571
572 /*
573 * linux/fs/nfs/read.c
574 */
575 extern int nfs_readpage(struct file *, struct page *);
576 extern int nfs_readpages(struct file *, struct address_space *,
577 struct list_head *, unsigned);
578 extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *);
579 extern int nfs_readpage_async(struct nfs_open_context *, struct inode *,
580 struct page *);
581
582 /*
583 * Allocate nfs_read_data structures
584 */
585 extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages);
586 extern void nfs_readdata_free(struct nfs_read_data *);
587
588 /*
589 * linux/fs/nfs3proc.c
590 */
591 #ifdef CONFIG_NFS_V3_ACL
592 extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
593 extern int nfs3_proc_setacl(struct inode *inode, int type,
594 struct posix_acl *acl);
595 extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
596 umode_t mode);
597 extern void nfs3_forget_cached_acls(struct inode *inode);
598 #else
nfs3_proc_set_default_acl(struct inode * dir,struct inode * inode,umode_t mode)599 static inline int nfs3_proc_set_default_acl(struct inode *dir,
600 struct inode *inode,
601 umode_t mode)
602 {
603 return 0;
604 }
605
nfs3_forget_cached_acls(struct inode * inode)606 static inline void nfs3_forget_cached_acls(struct inode *inode)
607 {
608 }
609 #endif /* CONFIG_NFS_V3_ACL */
610
611 /*
612 * inline functions
613 */
614
nfs_size_to_loff_t(__u64 size)615 static inline loff_t nfs_size_to_loff_t(__u64 size)
616 {
617 if (size > (__u64) OFFSET_MAX - 1)
618 return OFFSET_MAX - 1;
619 return (loff_t) size;
620 }
621
622 static inline ino_t
nfs_fileid_to_ino_t(u64 fileid)623 nfs_fileid_to_ino_t(u64 fileid)
624 {
625 ino_t ino = (ino_t) fileid;
626 if (sizeof(ino_t) < sizeof(u64))
627 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
628 return ino;
629 }
630
631 #define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
632
633 #endif /* __KERNEL__ */
634
635 /*
636 * NFS debug flags
637 */
638 #define NFSDBG_VFS 0x0001
639 #define NFSDBG_DIRCACHE 0x0002
640 #define NFSDBG_LOOKUPCACHE 0x0004
641 #define NFSDBG_PAGECACHE 0x0008
642 #define NFSDBG_PROC 0x0010
643 #define NFSDBG_XDR 0x0020
644 #define NFSDBG_FILE 0x0040
645 #define NFSDBG_ROOT 0x0080
646 #define NFSDBG_CALLBACK 0x0100
647 #define NFSDBG_CLIENT 0x0200
648 #define NFSDBG_MOUNT 0x0400
649 #define NFSDBG_FSCACHE 0x0800
650 #define NFSDBG_PNFS 0x1000
651 #define NFSDBG_PNFS_LD 0x2000
652 #define NFSDBG_ALL 0xFFFF
653
654 #ifdef __KERNEL__
655
656 # undef ifdebug
657 # ifdef NFS_DEBUG
658 # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac))
659 # define NFS_IFDEBUG(x) x
660 # else
661 # define ifdebug(fac) if (0)
662 # define NFS_IFDEBUG(x)
663 # endif
664 #endif /* __KERNEL */
665
666 #endif
667