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 | */ | |
8 | ||
9 | #ifndef _LINUX_NFS_FS_H | |
10 | #define _LINUX_NFS_FS_H | |
11 | ||
12 | #include <linux/config.h> | |
13 | #include <linux/in.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/pagemap.h> | |
16 | #include <linux/rwsem.h> | |
17 | #include <linux/wait.h> | |
1da177e4 LT |
18 | |
19 | #include <linux/nfs_fs_sb.h> | |
20 | ||
21 | #include <linux/sunrpc/debug.h> | |
22 | #include <linux/sunrpc/auth.h> | |
23 | #include <linux/sunrpc/clnt.h> | |
24 | ||
25 | #include <linux/nfs.h> | |
26 | #include <linux/nfs2.h> | |
27 | #include <linux/nfs3.h> | |
28 | #include <linux/nfs4.h> | |
29 | #include <linux/nfs_xdr.h> | |
30 | #include <linux/rwsem.h> | |
1da177e4 LT |
31 | #include <linux/mempool.h> |
32 | ||
33 | /* | |
34 | * Enable debugging support for nfs client. | |
35 | * Requires RPC_DEBUG. | |
36 | */ | |
37 | #ifdef RPC_DEBUG | |
38 | # define NFS_DEBUG | |
39 | #endif | |
40 | ||
41 | #define NFS_MAX_FILE_IO_BUFFER_SIZE 32768 | |
42 | #define NFS_DEF_FILE_IO_BUFFER_SIZE 4096 | |
43 | ||
1da177e4 LT |
44 | /* |
45 | * superblock magic number for NFS | |
46 | */ | |
47 | #define NFS_SUPER_MAGIC 0x6969 | |
48 | ||
49 | /* | |
50 | * These are the default flags for swap requests | |
51 | */ | |
52 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) | |
53 | ||
1da177e4 LT |
54 | /* |
55 | * When flushing a cluster of dirty pages, there can be different | |
56 | * strategies: | |
57 | */ | |
58 | #define FLUSH_AGING 0 /* only flush old buffers */ | |
59 | #define FLUSH_SYNC 1 /* file being synced, or contention */ | |
60 | #define FLUSH_WAIT 2 /* wait for completion */ | |
61 | #define FLUSH_STABLE 4 /* commit to stable storage */ | |
62 | #define FLUSH_LOWPRI 8 /* low priority background flush */ | |
63 | #define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */ | |
64 | ||
65 | #ifdef __KERNEL__ | |
66 | ||
67 | /* | |
68 | * NFSv3/v4 Access mode cache entry | |
69 | */ | |
70 | struct nfs_access_entry { | |
71 | unsigned long jiffies; | |
72 | struct rpc_cred * cred; | |
73 | int mask; | |
74 | }; | |
75 | ||
76 | struct nfs4_state; | |
77 | struct nfs_open_context { | |
78 | atomic_t count; | |
79 | struct dentry *dentry; | |
80 | struct rpc_cred *cred; | |
81 | struct nfs4_state *state; | |
82 | fl_owner_t lockowner; | |
83 | int mode; | |
84 | int error; | |
85 | ||
86 | struct list_head list; | |
00a92642 | 87 | |
00a92642 | 88 | __u64 dir_cookie; |
1da177e4 LT |
89 | }; |
90 | ||
91 | /* | |
92 | * NFSv4 delegation | |
93 | */ | |
94 | struct nfs_delegation; | |
95 | ||
5c6a9f7d AG |
96 | struct posix_acl; |
97 | ||
1da177e4 LT |
98 | /* |
99 | * nfs fs inode data in memory | |
100 | */ | |
101 | struct nfs_inode { | |
102 | /* | |
103 | * The 64bit 'inode number' | |
104 | */ | |
105 | __u64 fileid; | |
106 | ||
107 | /* | |
108 | * NFS file handle | |
109 | */ | |
110 | struct nfs_fh fh; | |
111 | ||
112 | /* | |
113 | * Various flags | |
114 | */ | |
115 | unsigned int flags; | |
116 | ||
117 | /* | |
118 | * read_cache_jiffies is when we started read-caching this inode, | |
119 | * and read_cache_mtime is the mtime of the inode at that time. | |
120 | * attrtimeo is for how long the cached information is assumed | |
121 | * to be valid. A successful attribute revalidation doubles | |
122 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
123 | * acregmin/acdirmin. | |
124 | * | |
125 | * We need to revalidate the cached attrs for this inode if | |
126 | * | |
127 | * jiffies - read_cache_jiffies > attrtimeo | |
128 | * | |
129 | * and invalidate any cached data/flush out any dirty pages if | |
130 | * we find that | |
131 | * | |
132 | * mtime != read_cache_mtime | |
133 | */ | |
1da177e4 LT |
134 | unsigned long read_cache_jiffies; |
135 | unsigned long attrtimeo; | |
136 | unsigned long attrtimeo_timestamp; | |
137 | __u64 change_attr; /* v4 only */ | |
138 | ||
139 | /* "Generation counter" for the attribute cache. This is | |
140 | * bumped whenever we update the metadata on the | |
141 | * server. | |
142 | */ | |
143 | unsigned long cache_change_attribute; | |
144 | /* | |
145 | * Counter indicating the number of outstanding requests that | |
146 | * will cause a file data update. | |
147 | */ | |
148 | atomic_t data_updates; | |
149 | ||
150 | struct nfs_access_entry cache_access; | |
5c6a9f7d AG |
151 | #ifdef CONFIG_NFS_V3_ACL |
152 | struct posix_acl *acl_access; | |
153 | struct posix_acl *acl_default; | |
154 | #endif | |
1da177e4 LT |
155 | |
156 | /* | |
157 | * This is the cookie verifier used for NFSv3 readdir | |
158 | * operations | |
159 | */ | |
160 | __u32 cookieverf[2]; | |
161 | ||
162 | /* | |
163 | * This is the list of dirty unwritten pages. | |
164 | */ | |
165 | spinlock_t req_lock; | |
166 | struct list_head dirty; | |
167 | struct list_head commit; | |
168 | struct radix_tree_root nfs_page_tree; | |
169 | ||
170 | unsigned int ndirty, | |
171 | ncommit, | |
172 | npages; | |
173 | ||
174 | /* Open contexts for shared mmap writes */ | |
175 | struct list_head open_files; | |
176 | ||
177 | wait_queue_head_t nfs_i_wait; | |
178 | ||
179 | #ifdef CONFIG_NFS_V4 | |
e50a1c2e | 180 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
181 | /* NFSv4 state */ |
182 | struct list_head open_states; | |
183 | struct nfs_delegation *delegation; | |
184 | int delegation_state; | |
185 | struct rw_semaphore rwsem; | |
186 | #endif /* CONFIG_NFS_V4*/ | |
1da177e4 LT |
187 | struct inode vfs_inode; |
188 | }; | |
189 | ||
190 | /* | |
191 | * Legal inode flag values | |
192 | */ | |
193 | #define NFS_INO_STALE 0x0001 /* possible stale inode */ | |
194 | #define NFS_INO_ADVISE_RDPLUS 0x0002 /* advise readdirplus */ | |
195 | #define NFS_INO_REVALIDATING 0x0004 /* revalidating attrs */ | |
196 | #define NFS_INO_INVALID_ATTR 0x0008 /* cached attrs are invalid */ | |
197 | #define NFS_INO_INVALID_DATA 0x0010 /* cached data is invalid */ | |
198 | #define NFS_INO_INVALID_ATIME 0x0020 /* cached atime is invalid */ | |
199 | #define NFS_INO_INVALID_ACCESS 0x0040 /* cached access cred invalid */ | |
ada70d94 | 200 | #define NFS_INO_INVALID_ACL 0x0080 /* cached acls are invalid */ |
1da177e4 LT |
201 | |
202 | static inline struct nfs_inode *NFS_I(struct inode *inode) | |
203 | { | |
204 | return container_of(inode, struct nfs_inode, vfs_inode); | |
205 | } | |
206 | #define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info)) | |
207 | ||
208 | #define NFS_FH(inode) (&NFS_I(inode)->fh) | |
209 | #define NFS_SERVER(inode) (NFS_SB(inode->i_sb)) | |
210 | #define NFS_CLIENT(inode) (NFS_SERVER(inode)->client) | |
211 | #define NFS_PROTO(inode) (NFS_SERVER(inode)->rpc_ops) | |
212 | #define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode))) | |
213 | #define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf) | |
214 | #define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies) | |
215 | #define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr) | |
216 | #define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo) | |
217 | #define NFS_MINATTRTIMEO(inode) \ | |
218 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \ | |
219 | : NFS_SERVER(inode)->acregmin) | |
220 | #define NFS_MAXATTRTIMEO(inode) \ | |
221 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \ | |
222 | : NFS_SERVER(inode)->acregmax) | |
223 | #define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp) | |
224 | ||
225 | #define NFS_FLAGS(inode) (NFS_I(inode)->flags) | |
226 | #define NFS_REVALIDATING(inode) (NFS_FLAGS(inode) & NFS_INO_REVALIDATING) | |
227 | #define NFS_STALE(inode) (NFS_FLAGS(inode) & NFS_INO_STALE) | |
228 | ||
229 | #define NFS_FILEID(inode) (NFS_I(inode)->fileid) | |
230 | ||
231 | static inline int nfs_caches_unstable(struct inode *inode) | |
232 | { | |
233 | return atomic_read(&NFS_I(inode)->data_updates) != 0; | |
234 | } | |
235 | ||
236 | static inline void NFS_CACHEINV(struct inode *inode) | |
237 | { | |
238 | if (!nfs_caches_unstable(inode)) | |
239 | NFS_FLAGS(inode) |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; | |
240 | } | |
241 | ||
242 | static inline int nfs_server_capable(struct inode *inode, int cap) | |
243 | { | |
244 | return NFS_SERVER(inode)->caps & cap; | |
245 | } | |
246 | ||
247 | static inline int NFS_USE_READDIRPLUS(struct inode *inode) | |
248 | { | |
249 | return NFS_FLAGS(inode) & NFS_INO_ADVISE_RDPLUS; | |
250 | } | |
251 | ||
252 | /** | |
253 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
254 | * @inode - pointer to inode | |
255 | * The "change attribute" is updated every time we finish an operation | |
256 | * that will result in a metadata change on the server. | |
257 | */ | |
258 | static inline long nfs_save_change_attribute(struct inode *inode) | |
259 | { | |
260 | return NFS_I(inode)->cache_change_attribute; | |
261 | } | |
262 | ||
263 | /** | |
264 | * nfs_verify_change_attribute - Detects NFS inode cache updates | |
265 | * @inode - pointer to inode | |
266 | * @chattr - previously saved change attribute | |
267 | * Return "false" if metadata has been updated (or is in the process of | |
268 | * being updated) since the change attribute was saved. | |
269 | */ | |
270 | static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr) | |
271 | { | |
272 | return !nfs_caches_unstable(inode) | |
273 | && chattr == NFS_I(inode)->cache_change_attribute; | |
274 | } | |
275 | ||
276 | /* | |
277 | * linux/fs/nfs/inode.c | |
278 | */ | |
279 | extern void nfs_zap_caches(struct inode *); | |
280 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, | |
281 | struct nfs_fattr *); | |
282 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); | |
283 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); | |
284 | extern int nfs_permission(struct inode *, int, struct nameidata *); | |
285 | extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *); | |
286 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); | |
287 | extern int nfs_open(struct inode *, struct file *); | |
288 | extern int nfs_release(struct inode *, struct file *); | |
289 | extern int nfs_attribute_timeout(struct inode *inode); | |
290 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); | |
291 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
292 | extern int nfs_setattr(struct dentry *, struct iattr *); | |
293 | extern void nfs_begin_attr_update(struct inode *); | |
294 | extern void nfs_end_attr_update(struct inode *); | |
295 | extern void nfs_begin_data_update(struct inode *); | |
296 | extern void nfs_end_data_update(struct inode *); | |
1da177e4 LT |
297 | extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred); |
298 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); | |
299 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
300 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); | |
301 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, int mode); | |
302 | extern void nfs_file_clear_open_context(struct file *filp); | |
303 | ||
304 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ | |
305 | extern u32 root_nfs_parse_addr(char *name); /*__init*/ | |
306 | ||
307 | /* | |
308 | * linux/fs/nfs/file.c | |
309 | */ | |
310 | extern struct inode_operations nfs_file_inode_operations; | |
b7fa0554 AG |
311 | #ifdef CONFIG_NFS_V3 |
312 | extern struct inode_operations nfs3_file_inode_operations; | |
313 | #endif /* CONFIG_NFS_V3 */ | |
1da177e4 LT |
314 | extern struct file_operations nfs_file_operations; |
315 | extern struct address_space_operations nfs_file_aops; | |
316 | ||
317 | static inline struct rpc_cred *nfs_file_cred(struct file *file) | |
318 | { | |
319 | if (file != NULL) { | |
320 | struct nfs_open_context *ctx; | |
321 | ||
322 | ctx = (struct nfs_open_context*)file->private_data; | |
323 | return ctx->cred; | |
324 | } | |
325 | return NULL; | |
326 | } | |
327 | ||
b7fa0554 AG |
328 | /* |
329 | * linux/fs/nfs/xattr.c | |
330 | */ | |
331 | #ifdef CONFIG_NFS_V3_ACL | |
332 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); | |
333 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); | |
334 | extern int nfs3_setxattr(struct dentry *, const char *, | |
335 | const void *, size_t, int); | |
336 | extern int nfs3_removexattr (struct dentry *, const char *name); | |
337 | #else | |
338 | # define nfs3_listxattr NULL | |
339 | # define nfs3_getxattr NULL | |
340 | # define nfs3_setxattr NULL | |
341 | # define nfs3_removexattr NULL | |
342 | #endif | |
343 | ||
1da177e4 LT |
344 | /* |
345 | * linux/fs/nfs/direct.c | |
346 | */ | |
347 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, | |
348 | unsigned long); | |
349 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf, | |
350 | size_t count, loff_t pos); | |
351 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf, | |
352 | size_t count, loff_t pos); | |
353 | ||
354 | /* | |
355 | * linux/fs/nfs/dir.c | |
356 | */ | |
357 | extern struct inode_operations nfs_dir_inode_operations; | |
b7fa0554 AG |
358 | #ifdef CONFIG_NFS_V3 |
359 | extern struct inode_operations nfs3_dir_inode_operations; | |
360 | #endif /* CONFIG_NFS_V3 */ | |
1da177e4 LT |
361 | extern struct file_operations nfs_dir_operations; |
362 | extern struct dentry_operations nfs_dentry_operations; | |
363 | ||
364 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); | |
365 | ||
366 | /* | |
367 | * linux/fs/nfs/symlink.c | |
368 | */ | |
369 | extern struct inode_operations nfs_symlink_inode_operations; | |
370 | ||
371 | /* | |
372 | * linux/fs/nfs/unlink.c | |
373 | */ | |
374 | extern int nfs_async_unlink(struct dentry *); | |
375 | extern void nfs_complete_unlink(struct dentry *); | |
376 | ||
377 | /* | |
378 | * linux/fs/nfs/write.c | |
379 | */ | |
380 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); | |
381 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
382 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
383 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
384 | extern void nfs_writeback_done(struct rpc_task *task); | |
385 | ||
386 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) | |
387 | extern void nfs_commit_done(struct rpc_task *); | |
388 | #endif | |
389 | ||
390 | /* | |
391 | * Try to write back everything synchronously (but check the | |
392 | * return value!) | |
393 | */ | |
394 | extern int nfs_sync_inode(struct inode *, unsigned long, unsigned int, int); | |
395 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) | |
396 | extern int nfs_commit_inode(struct inode *, unsigned long, unsigned int, int); | |
397 | #else | |
398 | static inline int | |
399 | nfs_commit_inode(struct inode *inode, unsigned long idx_start, unsigned int npages, int how) | |
400 | { | |
401 | return 0; | |
402 | } | |
403 | #endif | |
404 | ||
405 | static inline int | |
406 | nfs_have_writebacks(struct inode *inode) | |
407 | { | |
408 | return NFS_I(inode)->npages != 0; | |
409 | } | |
410 | ||
411 | static inline int | |
412 | nfs_wb_all(struct inode *inode) | |
413 | { | |
414 | int error = nfs_sync_inode(inode, 0, 0, FLUSH_WAIT); | |
415 | return (error < 0) ? error : 0; | |
416 | } | |
417 | ||
418 | /* | |
419 | * Write back all requests on one page - we do this before reading it. | |
420 | */ | |
421 | static inline int nfs_wb_page_priority(struct inode *inode, struct page* page, int how) | |
422 | { | |
423 | int error = nfs_sync_inode(inode, page->index, 1, | |
424 | how | FLUSH_WAIT | FLUSH_STABLE); | |
425 | return (error < 0) ? error : 0; | |
426 | } | |
427 | ||
428 | static inline int nfs_wb_page(struct inode *inode, struct page* page) | |
429 | { | |
430 | return nfs_wb_page_priority(inode, page, 0); | |
431 | } | |
432 | ||
433 | /* | |
434 | * Allocate and free nfs_write_data structures | |
435 | */ | |
436 | extern mempool_t *nfs_wdata_mempool; | |
437 | ||
438 | static inline struct nfs_write_data *nfs_writedata_alloc(void) | |
439 | { | |
440 | struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, SLAB_NOFS); | |
441 | if (p) { | |
442 | memset(p, 0, sizeof(*p)); | |
443 | INIT_LIST_HEAD(&p->pages); | |
444 | } | |
445 | return p; | |
446 | } | |
447 | ||
448 | static inline void nfs_writedata_free(struct nfs_write_data *p) | |
449 | { | |
450 | mempool_free(p, nfs_wdata_mempool); | |
451 | } | |
452 | ||
1da177e4 LT |
453 | /* |
454 | * linux/fs/nfs/read.c | |
455 | */ | |
456 | extern int nfs_readpage(struct file *, struct page *); | |
457 | extern int nfs_readpages(struct file *, struct address_space *, | |
458 | struct list_head *, unsigned); | |
459 | extern void nfs_readpage_result(struct rpc_task *); | |
460 | ||
461 | /* | |
462 | * Allocate and free nfs_read_data structures | |
463 | */ | |
464 | extern mempool_t *nfs_rdata_mempool; | |
465 | ||
466 | static inline struct nfs_read_data *nfs_readdata_alloc(void) | |
467 | { | |
468 | struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, SLAB_NOFS); | |
469 | if (p) | |
470 | memset(p, 0, sizeof(*p)); | |
471 | return p; | |
472 | } | |
473 | ||
474 | static inline void nfs_readdata_free(struct nfs_read_data *p) | |
475 | { | |
476 | mempool_free(p, nfs_rdata_mempool); | |
477 | } | |
478 | ||
479 | extern void nfs_readdata_release(struct rpc_task *task); | |
480 | ||
b7fa0554 AG |
481 | /* |
482 | * linux/fs/nfs3proc.c | |
483 | */ | |
484 | #ifdef CONFIG_NFS_V3_ACL | |
485 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); | |
486 | extern int nfs3_proc_setacl(struct inode *inode, int type, | |
487 | struct posix_acl *acl); | |
055ffbea AG |
488 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
489 | mode_t mode); | |
5c6a9f7d | 490 | extern void nfs3_forget_cached_acls(struct inode *inode); |
055ffbea AG |
491 | #else |
492 | static inline int nfs3_proc_set_default_acl(struct inode *dir, | |
493 | struct inode *inode, | |
494 | mode_t mode) | |
495 | { | |
496 | return 0; | |
497 | } | |
5c6a9f7d AG |
498 | |
499 | static inline void nfs3_forget_cached_acls(struct inode *inode) | |
500 | { | |
501 | } | |
b7fa0554 AG |
502 | #endif /* CONFIG_NFS_V3_ACL */ |
503 | ||
1da177e4 LT |
504 | /* |
505 | * linux/fs/mount_clnt.c | |
506 | * (Used only by nfsroot module) | |
507 | */ | |
508 | extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *, | |
509 | int, int); | |
510 | ||
511 | /* | |
512 | * inline functions | |
513 | */ | |
514 | ||
515 | static inline loff_t | |
516 | nfs_size_to_loff_t(__u64 size) | |
517 | { | |
518 | loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1; | |
519 | if (size > maxsz) | |
520 | return maxsz; | |
521 | return (loff_t) size; | |
522 | } | |
523 | ||
524 | static inline ino_t | |
525 | nfs_fileid_to_ino_t(u64 fileid) | |
526 | { | |
527 | ino_t ino = (ino_t) fileid; | |
528 | if (sizeof(ino_t) < sizeof(u64)) | |
529 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
530 | return ino; | |
531 | } | |
532 | ||
533 | /* NFS root */ | |
534 | ||
535 | extern void * nfs_root_data(void); | |
536 | ||
537 | #define nfs_wait_event(clnt, wq, condition) \ | |
538 | ({ \ | |
539 | int __retval = 0; \ | |
540 | if (clnt->cl_intr) { \ | |
541 | sigset_t oldmask; \ | |
542 | rpc_clnt_sigmask(clnt, &oldmask); \ | |
543 | __retval = wait_event_interruptible(wq, condition); \ | |
544 | rpc_clnt_sigunmask(clnt, &oldmask); \ | |
545 | } else \ | |
546 | wait_event(wq, condition); \ | |
547 | __retval; \ | |
548 | }) | |
549 | ||
550 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) | |
551 | ||
1da177e4 LT |
552 | #endif /* __KERNEL__ */ |
553 | ||
554 | /* | |
555 | * NFS debug flags | |
556 | */ | |
557 | #define NFSDBG_VFS 0x0001 | |
558 | #define NFSDBG_DIRCACHE 0x0002 | |
559 | #define NFSDBG_LOOKUPCACHE 0x0004 | |
560 | #define NFSDBG_PAGECACHE 0x0008 | |
561 | #define NFSDBG_PROC 0x0010 | |
562 | #define NFSDBG_XDR 0x0020 | |
563 | #define NFSDBG_FILE 0x0040 | |
564 | #define NFSDBG_ROOT 0x0080 | |
565 | #define NFSDBG_CALLBACK 0x0100 | |
566 | #define NFSDBG_ALL 0xFFFF | |
567 | ||
568 | #ifdef __KERNEL__ | |
569 | # undef ifdebug | |
570 | # ifdef NFS_DEBUG | |
571 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
572 | # else | |
573 | # define ifdebug(fac) if (0) | |
574 | # endif | |
575 | #endif /* __KERNEL */ | |
576 | ||
577 | #endif |