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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 | */ | |
412d582e CL |
115 | unsigned long flags; /* atomic bit ops */ |
116 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
117 | |
118 | /* | |
119 | * read_cache_jiffies is when we started read-caching this inode, | |
120 | * and read_cache_mtime is the mtime of the inode at that time. | |
121 | * attrtimeo is for how long the cached information is assumed | |
122 | * to be valid. A successful attribute revalidation doubles | |
123 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
124 | * acregmin/acdirmin. | |
125 | * | |
126 | * We need to revalidate the cached attrs for this inode if | |
127 | * | |
128 | * jiffies - read_cache_jiffies > attrtimeo | |
129 | * | |
130 | * and invalidate any cached data/flush out any dirty pages if | |
131 | * we find that | |
132 | * | |
133 | * mtime != read_cache_mtime | |
134 | */ | |
1da177e4 LT |
135 | unsigned long read_cache_jiffies; |
136 | unsigned long attrtimeo; | |
137 | unsigned long attrtimeo_timestamp; | |
138 | __u64 change_attr; /* v4 only */ | |
139 | ||
140 | /* "Generation counter" for the attribute cache. This is | |
141 | * bumped whenever we update the metadata on the | |
142 | * server. | |
143 | */ | |
144 | unsigned long cache_change_attribute; | |
145 | /* | |
146 | * Counter indicating the number of outstanding requests that | |
147 | * will cause a file data update. | |
148 | */ | |
149 | atomic_t data_updates; | |
150 | ||
151 | struct nfs_access_entry cache_access; | |
5c6a9f7d AG |
152 | #ifdef CONFIG_NFS_V3_ACL |
153 | struct posix_acl *acl_access; | |
154 | struct posix_acl *acl_default; | |
155 | #endif | |
1da177e4 LT |
156 | |
157 | /* | |
158 | * This is the cookie verifier used for NFSv3 readdir | |
159 | * operations | |
160 | */ | |
161 | __u32 cookieverf[2]; | |
162 | ||
163 | /* | |
164 | * This is the list of dirty unwritten pages. | |
165 | */ | |
166 | spinlock_t req_lock; | |
167 | struct list_head dirty; | |
168 | struct list_head commit; | |
169 | struct radix_tree_root nfs_page_tree; | |
170 | ||
171 | unsigned int ndirty, | |
172 | ncommit, | |
173 | npages; | |
174 | ||
175 | /* Open contexts for shared mmap writes */ | |
176 | struct list_head open_files; | |
177 | ||
1da177e4 | 178 | #ifdef CONFIG_NFS_V4 |
e50a1c2e | 179 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
180 | /* NFSv4 state */ |
181 | struct list_head open_states; | |
182 | struct nfs_delegation *delegation; | |
183 | int delegation_state; | |
184 | struct rw_semaphore rwsem; | |
185 | #endif /* CONFIG_NFS_V4*/ | |
1da177e4 LT |
186 | struct inode vfs_inode; |
187 | }; | |
188 | ||
189 | /* | |
55296809 | 190 | * Cache validity bit flags |
1da177e4 | 191 | */ |
55296809 CL |
192 | #define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */ |
193 | #define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ | |
194 | #define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ | |
195 | #define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ | |
196 | #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ | |
197 | #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ | |
198 | ||
199 | /* | |
412d582e | 200 | * Bit offsets in flags field |
55296809 | 201 | */ |
412d582e CL |
202 | #define NFS_INO_REVALIDATING (0) /* revalidating attrs */ |
203 | #define NFS_INO_ADVISE_RDPLUS (1) /* advise readdirplus */ | |
204 | #define NFS_INO_STALE (2) /* possible stale inode */ | |
1da177e4 LT |
205 | |
206 | static inline struct nfs_inode *NFS_I(struct inode *inode) | |
207 | { | |
208 | return container_of(inode, struct nfs_inode, vfs_inode); | |
209 | } | |
210 | #define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info)) | |
211 | ||
212 | #define NFS_FH(inode) (&NFS_I(inode)->fh) | |
213 | #define NFS_SERVER(inode) (NFS_SB(inode->i_sb)) | |
214 | #define NFS_CLIENT(inode) (NFS_SERVER(inode)->client) | |
215 | #define NFS_PROTO(inode) (NFS_SERVER(inode)->rpc_ops) | |
216 | #define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode))) | |
217 | #define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf) | |
218 | #define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies) | |
219 | #define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr) | |
220 | #define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo) | |
221 | #define NFS_MINATTRTIMEO(inode) \ | |
222 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \ | |
223 | : NFS_SERVER(inode)->acregmin) | |
224 | #define NFS_MAXATTRTIMEO(inode) \ | |
225 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \ | |
226 | : NFS_SERVER(inode)->acregmax) | |
227 | #define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp) | |
228 | ||
229 | #define NFS_FLAGS(inode) (NFS_I(inode)->flags) | |
412d582e | 230 | #define NFS_STALE(inode) (test_bit(NFS_INO_STALE, &NFS_FLAGS(inode))) |
1da177e4 LT |
231 | |
232 | #define NFS_FILEID(inode) (NFS_I(inode)->fileid) | |
233 | ||
234 | static inline int nfs_caches_unstable(struct inode *inode) | |
235 | { | |
236 | return atomic_read(&NFS_I(inode)->data_updates) != 0; | |
237 | } | |
238 | ||
239 | static inline void NFS_CACHEINV(struct inode *inode) | |
240 | { | |
dc59250c CL |
241 | if (!nfs_caches_unstable(inode)) { |
242 | spin_lock(&inode->i_lock); | |
55296809 | 243 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; |
dc59250c CL |
244 | spin_unlock(&inode->i_lock); |
245 | } | |
1da177e4 LT |
246 | } |
247 | ||
248 | static inline int nfs_server_capable(struct inode *inode, int cap) | |
249 | { | |
250 | return NFS_SERVER(inode)->caps & cap; | |
251 | } | |
252 | ||
253 | static inline int NFS_USE_READDIRPLUS(struct inode *inode) | |
254 | { | |
412d582e | 255 | return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
1da177e4 LT |
256 | } |
257 | ||
258 | /** | |
259 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
260 | * @inode - pointer to inode | |
261 | * The "change attribute" is updated every time we finish an operation | |
262 | * that will result in a metadata change on the server. | |
263 | */ | |
264 | static inline long nfs_save_change_attribute(struct inode *inode) | |
265 | { | |
266 | return NFS_I(inode)->cache_change_attribute; | |
267 | } | |
268 | ||
269 | /** | |
270 | * nfs_verify_change_attribute - Detects NFS inode cache updates | |
271 | * @inode - pointer to inode | |
272 | * @chattr - previously saved change attribute | |
273 | * Return "false" if metadata has been updated (or is in the process of | |
274 | * being updated) since the change attribute was saved. | |
275 | */ | |
276 | static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr) | |
277 | { | |
278 | return !nfs_caches_unstable(inode) | |
279 | && chattr == NFS_I(inode)->cache_change_attribute; | |
280 | } | |
281 | ||
282 | /* | |
283 | * linux/fs/nfs/inode.c | |
284 | */ | |
285 | extern void nfs_zap_caches(struct inode *); | |
286 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, | |
287 | struct nfs_fattr *); | |
288 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); | |
289 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); | |
290 | extern int nfs_permission(struct inode *, int, struct nameidata *); | |
291 | extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *); | |
292 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); | |
293 | extern int nfs_open(struct inode *, struct file *); | |
294 | extern int nfs_release(struct inode *, struct file *); | |
295 | extern int nfs_attribute_timeout(struct inode *inode); | |
296 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); | |
297 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
7d52e862 | 298 | extern void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 299 | extern int nfs_setattr(struct dentry *, struct iattr *); |
65e4308d | 300 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); |
1da177e4 LT |
301 | extern void nfs_begin_attr_update(struct inode *); |
302 | extern void nfs_end_attr_update(struct inode *); | |
303 | extern void nfs_begin_data_update(struct inode *); | |
304 | extern void nfs_end_data_update(struct inode *); | |
1da177e4 LT |
305 | extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred); |
306 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); | |
307 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
308 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); | |
309 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, int mode); | |
310 | extern void nfs_file_clear_open_context(struct file *filp); | |
311 | ||
312 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ | |
313 | extern u32 root_nfs_parse_addr(char *name); /*__init*/ | |
314 | ||
315 | /* | |
316 | * linux/fs/nfs/file.c | |
317 | */ | |
318 | extern struct inode_operations nfs_file_inode_operations; | |
b7fa0554 AG |
319 | #ifdef CONFIG_NFS_V3 |
320 | extern struct inode_operations nfs3_file_inode_operations; | |
321 | #endif /* CONFIG_NFS_V3 */ | |
1da177e4 LT |
322 | extern struct file_operations nfs_file_operations; |
323 | extern struct address_space_operations nfs_file_aops; | |
324 | ||
325 | static inline struct rpc_cred *nfs_file_cred(struct file *file) | |
326 | { | |
327 | if (file != NULL) { | |
328 | struct nfs_open_context *ctx; | |
329 | ||
330 | ctx = (struct nfs_open_context*)file->private_data; | |
331 | return ctx->cred; | |
332 | } | |
333 | return NULL; | |
334 | } | |
335 | ||
b7fa0554 AG |
336 | /* |
337 | * linux/fs/nfs/xattr.c | |
338 | */ | |
339 | #ifdef CONFIG_NFS_V3_ACL | |
340 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); | |
341 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); | |
342 | extern int nfs3_setxattr(struct dentry *, const char *, | |
343 | const void *, size_t, int); | |
344 | extern int nfs3_removexattr (struct dentry *, const char *name); | |
345 | #else | |
346 | # define nfs3_listxattr NULL | |
347 | # define nfs3_getxattr NULL | |
348 | # define nfs3_setxattr NULL | |
349 | # define nfs3_removexattr NULL | |
350 | #endif | |
351 | ||
1da177e4 LT |
352 | /* |
353 | * linux/fs/nfs/direct.c | |
354 | */ | |
355 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, | |
356 | unsigned long); | |
357 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf, | |
358 | size_t count, loff_t pos); | |
359 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf, | |
360 | size_t count, loff_t pos); | |
361 | ||
362 | /* | |
363 | * linux/fs/nfs/dir.c | |
364 | */ | |
365 | extern struct inode_operations nfs_dir_inode_operations; | |
b7fa0554 AG |
366 | #ifdef CONFIG_NFS_V3 |
367 | extern struct inode_operations nfs3_dir_inode_operations; | |
368 | #endif /* CONFIG_NFS_V3 */ | |
1da177e4 LT |
369 | extern struct file_operations nfs_dir_operations; |
370 | extern struct dentry_operations nfs_dentry_operations; | |
371 | ||
372 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); | |
373 | ||
374 | /* | |
375 | * linux/fs/nfs/symlink.c | |
376 | */ | |
377 | extern struct inode_operations nfs_symlink_inode_operations; | |
378 | ||
379 | /* | |
380 | * linux/fs/nfs/unlink.c | |
381 | */ | |
382 | extern int nfs_async_unlink(struct dentry *); | |
383 | extern void nfs_complete_unlink(struct dentry *); | |
384 | ||
385 | /* | |
386 | * linux/fs/nfs/write.c | |
387 | */ | |
388 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); | |
389 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
390 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
391 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
392 | extern void nfs_writeback_done(struct rpc_task *task); | |
393 | ||
394 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) | |
395 | extern void nfs_commit_done(struct rpc_task *); | |
396 | #endif | |
397 | ||
398 | /* | |
399 | * Try to write back everything synchronously (but check the | |
400 | * return value!) | |
401 | */ | |
402 | extern int nfs_sync_inode(struct inode *, unsigned long, unsigned int, int); | |
403 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) | |
3da28eb1 | 404 | extern int nfs_commit_inode(struct inode *, int); |
1da177e4 LT |
405 | #else |
406 | static inline int | |
3da28eb1 | 407 | nfs_commit_inode(struct inode *inode, int how) |
1da177e4 LT |
408 | { |
409 | return 0; | |
410 | } | |
411 | #endif | |
412 | ||
413 | static inline int | |
414 | nfs_have_writebacks(struct inode *inode) | |
415 | { | |
416 | return NFS_I(inode)->npages != 0; | |
417 | } | |
418 | ||
419 | static inline int | |
420 | nfs_wb_all(struct inode *inode) | |
421 | { | |
422 | int error = nfs_sync_inode(inode, 0, 0, FLUSH_WAIT); | |
423 | return (error < 0) ? error : 0; | |
424 | } | |
425 | ||
426 | /* | |
427 | * Write back all requests on one page - we do this before reading it. | |
428 | */ | |
429 | static inline int nfs_wb_page_priority(struct inode *inode, struct page* page, int how) | |
430 | { | |
431 | int error = nfs_sync_inode(inode, page->index, 1, | |
432 | how | FLUSH_WAIT | FLUSH_STABLE); | |
433 | return (error < 0) ? error : 0; | |
434 | } | |
435 | ||
436 | static inline int nfs_wb_page(struct inode *inode, struct page* page) | |
437 | { | |
438 | return nfs_wb_page_priority(inode, page, 0); | |
439 | } | |
440 | ||
441 | /* | |
442 | * Allocate and free nfs_write_data structures | |
443 | */ | |
444 | extern mempool_t *nfs_wdata_mempool; | |
445 | ||
446 | static inline struct nfs_write_data *nfs_writedata_alloc(void) | |
447 | { | |
448 | struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, SLAB_NOFS); | |
449 | if (p) { | |
450 | memset(p, 0, sizeof(*p)); | |
451 | INIT_LIST_HEAD(&p->pages); | |
452 | } | |
453 | return p; | |
454 | } | |
455 | ||
456 | static inline void nfs_writedata_free(struct nfs_write_data *p) | |
457 | { | |
458 | mempool_free(p, nfs_wdata_mempool); | |
459 | } | |
460 | ||
1da177e4 LT |
461 | /* |
462 | * linux/fs/nfs/read.c | |
463 | */ | |
464 | extern int nfs_readpage(struct file *, struct page *); | |
465 | extern int nfs_readpages(struct file *, struct address_space *, | |
466 | struct list_head *, unsigned); | |
467 | extern void nfs_readpage_result(struct rpc_task *); | |
468 | ||
469 | /* | |
470 | * Allocate and free nfs_read_data structures | |
471 | */ | |
472 | extern mempool_t *nfs_rdata_mempool; | |
473 | ||
474 | static inline struct nfs_read_data *nfs_readdata_alloc(void) | |
475 | { | |
476 | struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, SLAB_NOFS); | |
477 | if (p) | |
478 | memset(p, 0, sizeof(*p)); | |
479 | return p; | |
480 | } | |
481 | ||
482 | static inline void nfs_readdata_free(struct nfs_read_data *p) | |
483 | { | |
484 | mempool_free(p, nfs_rdata_mempool); | |
485 | } | |
486 | ||
487 | extern void nfs_readdata_release(struct rpc_task *task); | |
488 | ||
b7fa0554 AG |
489 | /* |
490 | * linux/fs/nfs3proc.c | |
491 | */ | |
492 | #ifdef CONFIG_NFS_V3_ACL | |
493 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); | |
494 | extern int nfs3_proc_setacl(struct inode *inode, int type, | |
495 | struct posix_acl *acl); | |
055ffbea AG |
496 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
497 | mode_t mode); | |
5c6a9f7d | 498 | extern void nfs3_forget_cached_acls(struct inode *inode); |
055ffbea AG |
499 | #else |
500 | static inline int nfs3_proc_set_default_acl(struct inode *dir, | |
501 | struct inode *inode, | |
502 | mode_t mode) | |
503 | { | |
504 | return 0; | |
505 | } | |
5c6a9f7d AG |
506 | |
507 | static inline void nfs3_forget_cached_acls(struct inode *inode) | |
508 | { | |
509 | } | |
b7fa0554 AG |
510 | #endif /* CONFIG_NFS_V3_ACL */ |
511 | ||
1da177e4 LT |
512 | /* |
513 | * linux/fs/mount_clnt.c | |
514 | * (Used only by nfsroot module) | |
515 | */ | |
516 | extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *, | |
517 | int, int); | |
518 | ||
519 | /* | |
520 | * inline functions | |
521 | */ | |
522 | ||
523 | static inline loff_t | |
524 | nfs_size_to_loff_t(__u64 size) | |
525 | { | |
526 | loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1; | |
527 | if (size > maxsz) | |
528 | return maxsz; | |
529 | return (loff_t) size; | |
530 | } | |
531 | ||
532 | static inline ino_t | |
533 | nfs_fileid_to_ino_t(u64 fileid) | |
534 | { | |
535 | ino_t ino = (ino_t) fileid; | |
536 | if (sizeof(ino_t) < sizeof(u64)) | |
537 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
538 | return ino; | |
539 | } | |
540 | ||
541 | /* NFS root */ | |
542 | ||
543 | extern void * nfs_root_data(void); | |
544 | ||
545 | #define nfs_wait_event(clnt, wq, condition) \ | |
546 | ({ \ | |
547 | int __retval = 0; \ | |
548 | if (clnt->cl_intr) { \ | |
549 | sigset_t oldmask; \ | |
550 | rpc_clnt_sigmask(clnt, &oldmask); \ | |
551 | __retval = wait_event_interruptible(wq, condition); \ | |
552 | rpc_clnt_sigunmask(clnt, &oldmask); \ | |
553 | } else \ | |
554 | wait_event(wq, condition); \ | |
555 | __retval; \ | |
556 | }) | |
557 | ||
558 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) | |
559 | ||
1da177e4 LT |
560 | #endif /* __KERNEL__ */ |
561 | ||
562 | /* | |
563 | * NFS debug flags | |
564 | */ | |
565 | #define NFSDBG_VFS 0x0001 | |
566 | #define NFSDBG_DIRCACHE 0x0002 | |
567 | #define NFSDBG_LOOKUPCACHE 0x0004 | |
568 | #define NFSDBG_PAGECACHE 0x0008 | |
569 | #define NFSDBG_PROC 0x0010 | |
570 | #define NFSDBG_XDR 0x0020 | |
571 | #define NFSDBG_FILE 0x0040 | |
572 | #define NFSDBG_ROOT 0x0080 | |
573 | #define NFSDBG_CALLBACK 0x0100 | |
574 | #define NFSDBG_ALL 0xFFFF | |
575 | ||
576 | #ifdef __KERNEL__ | |
577 | # undef ifdebug | |
578 | # ifdef NFS_DEBUG | |
579 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
580 | # else | |
581 | # define ifdebug(fac) if (0) | |
582 | # endif | |
583 | #endif /* __KERNEL */ | |
584 | ||
585 | #endif |