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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 | ||
1da177e4 LT |
12 | /* |
13 | * Enable debugging support for nfs client. | |
14 | * Requires RPC_DEBUG. | |
15 | */ | |
16 | #ifdef RPC_DEBUG | |
17 | # define NFS_DEBUG | |
18 | #endif | |
19 | ||
03bf4b70 CL |
20 | /* Default timeout values */ |
21 | #define NFS_MAX_UDP_TIMEOUT (60*HZ) | |
22 | #define NFS_MAX_TCP_TIMEOUT (600*HZ) | |
23 | ||
1da177e4 LT |
24 | /* |
25 | * superblock magic number for NFS | |
26 | */ | |
27 | #define NFS_SUPER_MAGIC 0x6969 | |
28 | ||
1da177e4 LT |
29 | /* |
30 | * When flushing a cluster of dirty pages, there can be different | |
31 | * strategies: | |
32 | */ | |
1da177e4 | 33 | #define FLUSH_SYNC 1 /* file being synced, or contention */ |
1da177e4 LT |
34 | #define FLUSH_STABLE 4 /* commit to stable storage */ |
35 | #define FLUSH_LOWPRI 8 /* low priority background flush */ | |
36 | #define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */ | |
70b9ecbd | 37 | #define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */ |
d2ccddf0 | 38 | #define FLUSH_INVALIDATE 64 /* Invalidate the page cache */ |
1da177e4 LT |
39 | |
40 | #ifdef __KERNEL__ | |
41 | ||
7f1cbe51 DW |
42 | #include <linux/in.h> |
43 | #include <linux/mm.h> | |
44 | #include <linux/pagemap.h> | |
1c3c07e9 | 45 | #include <linux/rbtree.h> |
7f1cbe51 DW |
46 | #include <linux/rwsem.h> |
47 | #include <linux/wait.h> | |
48 | ||
49 | #include <linux/sunrpc/debug.h> | |
50 | #include <linux/sunrpc/auth.h> | |
51 | #include <linux/sunrpc/clnt.h> | |
52 | ||
53 | #include <linux/nfs.h> | |
54 | #include <linux/nfs2.h> | |
55 | #include <linux/nfs3.h> | |
56 | #include <linux/nfs4.h> | |
57 | #include <linux/nfs_xdr.h> | |
58 | ||
59 | #include <linux/nfs_fs_sb.h> | |
60 | ||
61 | #include <linux/rwsem.h> | |
62 | #include <linux/mempool.h> | |
63 | ||
64 | /* | |
65 | * These are the default flags for swap requests | |
66 | */ | |
67 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) | |
68 | ||
1da177e4 LT |
69 | /* |
70 | * NFSv3/v4 Access mode cache entry | |
71 | */ | |
72 | struct nfs_access_entry { | |
1c3c07e9 | 73 | struct rb_node rb_node; |
1da177e4 LT |
74 | unsigned long jiffies; |
75 | struct rpc_cred * cred; | |
76 | int mask; | |
77 | }; | |
78 | ||
79 | struct nfs4_state; | |
80 | struct nfs_open_context { | |
81 | atomic_t count; | |
b92dccf6 | 82 | struct vfsmount *vfsmnt; |
1da177e4 LT |
83 | struct dentry *dentry; |
84 | struct rpc_cred *cred; | |
85 | struct nfs4_state *state; | |
86 | fl_owner_t lockowner; | |
87 | int mode; | |
88 | int error; | |
89 | ||
90 | struct list_head list; | |
00a92642 | 91 | |
00a92642 | 92 | __u64 dir_cookie; |
1da177e4 LT |
93 | }; |
94 | ||
95 | /* | |
96 | * NFSv4 delegation | |
97 | */ | |
98 | struct nfs_delegation; | |
99 | ||
5c6a9f7d AG |
100 | struct posix_acl; |
101 | ||
1da177e4 LT |
102 | /* |
103 | * nfs fs inode data in memory | |
104 | */ | |
105 | struct nfs_inode { | |
106 | /* | |
107 | * The 64bit 'inode number' | |
108 | */ | |
109 | __u64 fileid; | |
110 | ||
111 | /* | |
112 | * NFS file handle | |
113 | */ | |
114 | struct nfs_fh fh; | |
115 | ||
116 | /* | |
117 | * Various flags | |
118 | */ | |
412d582e CL |
119 | unsigned long flags; /* atomic bit ops */ |
120 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
121 | |
122 | /* | |
24bd68f4 | 123 | * read_cache_jiffies is when we started read-caching this inode. |
1da177e4 LT |
124 | * attrtimeo is for how long the cached information is assumed |
125 | * to be valid. A successful attribute revalidation doubles | |
126 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
127 | * acregmin/acdirmin. | |
128 | * | |
129 | * We need to revalidate the cached attrs for this inode if | |
130 | * | |
131 | * jiffies - read_cache_jiffies > attrtimeo | |
1da177e4 | 132 | */ |
1da177e4 LT |
133 | unsigned long read_cache_jiffies; |
134 | unsigned long attrtimeo; | |
135 | unsigned long attrtimeo_timestamp; | |
136 | __u64 change_attr; /* v4 only */ | |
137 | ||
33801147 | 138 | unsigned long last_updated; |
1da177e4 LT |
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 | ||
1c3c07e9 | 150 | struct rb_root access_cache; |
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 | ||
1da177e4 | 177 | #ifdef CONFIG_NFS_V4 |
e50a1c2e | 178 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
179 | /* NFSv4 state */ |
180 | struct list_head open_states; | |
181 | struct nfs_delegation *delegation; | |
182 | int delegation_state; | |
183 | struct rw_semaphore rwsem; | |
184 | #endif /* CONFIG_NFS_V4*/ | |
1da177e4 LT |
185 | struct inode vfs_inode; |
186 | }; | |
187 | ||
188 | /* | |
55296809 | 189 | * Cache validity bit flags |
1da177e4 | 190 | */ |
55296809 CL |
191 | #define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */ |
192 | #define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ | |
193 | #define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ | |
194 | #define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ | |
195 | #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ | |
196 | #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ | |
197 | ||
198 | /* | |
412d582e | 199 | * Bit offsets in flags field |
55296809 | 200 | */ |
412d582e CL |
201 | #define NFS_INO_REVALIDATING (0) /* revalidating attrs */ |
202 | #define NFS_INO_ADVISE_RDPLUS (1) /* advise readdirplus */ | |
203 | #define NFS_INO_STALE (2) /* possible stale inode */ | |
1da177e4 LT |
204 | |
205 | static inline struct nfs_inode *NFS_I(struct inode *inode) | |
206 | { | |
207 | return container_of(inode, struct nfs_inode, vfs_inode); | |
208 | } | |
209 | #define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info)) | |
210 | ||
211 | #define NFS_FH(inode) (&NFS_I(inode)->fh) | |
212 | #define NFS_SERVER(inode) (NFS_SB(inode->i_sb)) | |
213 | #define NFS_CLIENT(inode) (NFS_SERVER(inode)->client) | |
214 | #define NFS_PROTO(inode) (NFS_SERVER(inode)->rpc_ops) | |
215 | #define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode))) | |
216 | #define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf) | |
217 | #define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies) | |
218 | #define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr) | |
219 | #define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo) | |
220 | #define NFS_MINATTRTIMEO(inode) \ | |
221 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \ | |
222 | : NFS_SERVER(inode)->acregmin) | |
223 | #define NFS_MAXATTRTIMEO(inode) \ | |
224 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \ | |
225 | : NFS_SERVER(inode)->acregmax) | |
226 | #define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp) | |
227 | ||
228 | #define NFS_FLAGS(inode) (NFS_I(inode)->flags) | |
412d582e | 229 | #define NFS_STALE(inode) (test_bit(NFS_INO_STALE, &NFS_FLAGS(inode))) |
1da177e4 LT |
230 | |
231 | #define NFS_FILEID(inode) (NFS_I(inode)->fileid) | |
232 | ||
233 | static inline int nfs_caches_unstable(struct inode *inode) | |
234 | { | |
235 | return atomic_read(&NFS_I(inode)->data_updates) != 0; | |
236 | } | |
237 | ||
decf491f TM |
238 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
239 | { | |
38478b24 TM |
240 | struct nfs_inode *nfsi = NFS_I(inode); |
241 | ||
decf491f | 242 | spin_lock(&inode->i_lock); |
38478b24 TM |
243 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS; |
244 | if (S_ISDIR(inode->i_mode)) | |
245 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; | |
decf491f TM |
246 | spin_unlock(&inode->i_lock); |
247 | } | |
248 | ||
1da177e4 LT |
249 | static inline void NFS_CACHEINV(struct inode *inode) |
250 | { | |
decf491f TM |
251 | if (!nfs_caches_unstable(inode)) |
252 | nfs_mark_for_revalidate(inode); | |
1da177e4 LT |
253 | } |
254 | ||
255 | static inline int nfs_server_capable(struct inode *inode, int cap) | |
256 | { | |
257 | return NFS_SERVER(inode)->caps & cap; | |
258 | } | |
259 | ||
260 | static inline int NFS_USE_READDIRPLUS(struct inode *inode) | |
261 | { | |
412d582e | 262 | return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
1da177e4 LT |
263 | } |
264 | ||
265 | /** | |
266 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
267 | * @inode - pointer to inode | |
268 | * The "change attribute" is updated every time we finish an operation | |
269 | * that will result in a metadata change on the server. | |
270 | */ | |
271 | static inline long nfs_save_change_attribute(struct inode *inode) | |
272 | { | |
273 | return NFS_I(inode)->cache_change_attribute; | |
274 | } | |
275 | ||
276 | /** | |
277 | * nfs_verify_change_attribute - Detects NFS inode cache updates | |
278 | * @inode - pointer to inode | |
279 | * @chattr - previously saved change attribute | |
280 | * Return "false" if metadata has been updated (or is in the process of | |
281 | * being updated) since the change attribute was saved. | |
282 | */ | |
283 | static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr) | |
284 | { | |
285 | return !nfs_caches_unstable(inode) | |
913a70fc | 286 | && time_after_eq(chattr, NFS_I(inode)->cache_change_attribute); |
1da177e4 LT |
287 | } |
288 | ||
289 | /* | |
290 | * linux/fs/nfs/inode.c | |
291 | */ | |
29884df0 | 292 | extern int nfs_sync_mapping(struct address_space *mapping); |
1da177e4 LT |
293 | extern void nfs_zap_caches(struct inode *); |
294 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, | |
295 | struct nfs_fattr *); | |
296 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); | |
decf491f | 297 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
1da177e4 LT |
298 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
299 | extern int nfs_permission(struct inode *, int, struct nameidata *); | |
300 | extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *); | |
301 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); | |
1c3c07e9 | 302 | extern void nfs_access_zap_cache(struct inode *inode); |
1da177e4 LT |
303 | extern int nfs_open(struct inode *, struct file *); |
304 | extern int nfs_release(struct inode *, struct file *); | |
305 | extern int nfs_attribute_timeout(struct inode *inode); | |
306 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); | |
307 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
44b11874 | 308 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 309 | extern int nfs_setattr(struct dentry *, struct iattr *); |
65e4308d | 310 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); |
1da177e4 LT |
311 | extern void nfs_begin_attr_update(struct inode *); |
312 | extern void nfs_end_attr_update(struct inode *); | |
313 | extern void nfs_begin_data_update(struct inode *); | |
314 | extern void nfs_end_data_update(struct inode *); | |
1da177e4 LT |
315 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
316 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
d530838b | 317 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode); |
55a97593 TM |
318 | extern struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent, |
319 | const struct dentry *dentry, | |
320 | struct nfs_fh *fh, | |
321 | struct nfs_fattr *fattr); | |
1da177e4 LT |
322 | |
323 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ | |
324 | extern u32 root_nfs_parse_addr(char *name); /*__init*/ | |
325 | ||
0e574af1 TM |
326 | static inline void nfs_fattr_init(struct nfs_fattr *fattr) |
327 | { | |
328 | fattr->valid = 0; | |
33801147 | 329 | fattr->time_start = jiffies; |
0e574af1 TM |
330 | } |
331 | ||
1da177e4 LT |
332 | /* |
333 | * linux/fs/nfs/file.c | |
334 | */ | |
335 | extern struct inode_operations nfs_file_inode_operations; | |
b7fa0554 AG |
336 | #ifdef CONFIG_NFS_V3 |
337 | extern struct inode_operations nfs3_file_inode_operations; | |
338 | #endif /* CONFIG_NFS_V3 */ | |
4b6f5d20 | 339 | extern const struct file_operations nfs_file_operations; |
f5e54d6e | 340 | extern const struct address_space_operations nfs_file_aops; |
1da177e4 LT |
341 | |
342 | static inline struct rpc_cred *nfs_file_cred(struct file *file) | |
343 | { | |
344 | if (file != NULL) { | |
345 | struct nfs_open_context *ctx; | |
346 | ||
347 | ctx = (struct nfs_open_context*)file->private_data; | |
348 | return ctx->cred; | |
349 | } | |
350 | return NULL; | |
351 | } | |
352 | ||
b7fa0554 AG |
353 | /* |
354 | * linux/fs/nfs/xattr.c | |
355 | */ | |
356 | #ifdef CONFIG_NFS_V3_ACL | |
357 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); | |
358 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); | |
359 | extern int nfs3_setxattr(struct dentry *, const char *, | |
360 | const void *, size_t, int); | |
361 | extern int nfs3_removexattr (struct dentry *, const char *name); | |
362 | #else | |
363 | # define nfs3_listxattr NULL | |
364 | # define nfs3_getxattr NULL | |
365 | # define nfs3_setxattr NULL | |
366 | # define nfs3_removexattr NULL | |
367 | #endif | |
368 | ||
1da177e4 LT |
369 | /* |
370 | * linux/fs/nfs/direct.c | |
371 | */ | |
372 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, | |
373 | unsigned long); | |
374 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf, | |
375 | size_t count, loff_t pos); | |
376 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf, | |
377 | size_t count, loff_t pos); | |
378 | ||
379 | /* | |
380 | * linux/fs/nfs/dir.c | |
381 | */ | |
382 | extern struct inode_operations nfs_dir_inode_operations; | |
b7fa0554 AG |
383 | #ifdef CONFIG_NFS_V3 |
384 | extern struct inode_operations nfs3_dir_inode_operations; | |
385 | #endif /* CONFIG_NFS_V3 */ | |
4b6f5d20 | 386 | extern const struct file_operations nfs_dir_operations; |
1da177e4 LT |
387 | extern struct dentry_operations nfs_dentry_operations; |
388 | ||
389 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); | |
390 | ||
391 | /* | |
392 | * linux/fs/nfs/symlink.c | |
393 | */ | |
394 | extern struct inode_operations nfs_symlink_inode_operations; | |
395 | ||
a72b4422 TM |
396 | /* |
397 | * linux/fs/nfs/sysctl.c | |
398 | */ | |
399 | #ifdef CONFIG_SYSCTL | |
400 | extern int nfs_register_sysctl(void); | |
401 | extern void nfs_unregister_sysctl(void); | |
402 | #else | |
7fd105e7 | 403 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
404 | #define nfs_unregister_sysctl() do { } while(0) |
405 | #endif | |
406 | ||
55a97593 TM |
407 | /* |
408 | * linux/fs/nfs/namespace.c | |
409 | */ | |
51d8fa6a | 410 | extern struct list_head nfs_automount_list; |
55a97593 | 411 | extern struct inode_operations nfs_mountpoint_inode_operations; |
6b97fd3d | 412 | extern struct inode_operations nfs_referral_inode_operations; |
51d8fa6a TM |
413 | extern int nfs_mountpoint_expiry_timeout; |
414 | extern void nfs_release_automount_timer(void); | |
55a97593 | 415 | |
1da177e4 LT |
416 | /* |
417 | * linux/fs/nfs/unlink.c | |
418 | */ | |
419 | extern int nfs_async_unlink(struct dentry *); | |
420 | extern void nfs_complete_unlink(struct dentry *); | |
421 | ||
422 | /* | |
423 | * linux/fs/nfs/write.c | |
424 | */ | |
425 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); | |
426 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
427 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
428 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
462d5b32 CL |
429 | extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *); |
430 | extern void nfs_writedata_release(void *); | |
1da177e4 | 431 | |
e17b1fc4 | 432 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
e9f7bee1 | 433 | struct nfs_write_data *nfs_commit_alloc(void); |
e17b1fc4 TM |
434 | void nfs_commit_free(struct nfs_write_data *p); |
435 | #endif | |
436 | ||
1da177e4 LT |
437 | /* |
438 | * Try to write back everything synchronously (but check the | |
439 | * return value!) | |
440 | */ | |
c42de9dd | 441 | extern int nfs_sync_inode_wait(struct inode *, unsigned long, unsigned int, int); |
1da177e4 | 442 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
3da28eb1 | 443 | extern int nfs_commit_inode(struct inode *, int); |
fad61490 | 444 | extern void nfs_commit_release(void *wdata); |
1da177e4 LT |
445 | #else |
446 | static inline int | |
3da28eb1 | 447 | nfs_commit_inode(struct inode *inode, int how) |
1da177e4 LT |
448 | { |
449 | return 0; | |
450 | } | |
451 | #endif | |
452 | ||
453 | static inline int | |
454 | nfs_have_writebacks(struct inode *inode) | |
455 | { | |
456 | return NFS_I(inode)->npages != 0; | |
457 | } | |
458 | ||
459 | static inline int | |
460 | nfs_wb_all(struct inode *inode) | |
461 | { | |
c42de9dd | 462 | int error = nfs_sync_inode_wait(inode, 0, 0, 0); |
1da177e4 LT |
463 | return (error < 0) ? error : 0; |
464 | } | |
465 | ||
466 | /* | |
467 | * Write back all requests on one page - we do this before reading it. | |
468 | */ | |
469 | static inline int nfs_wb_page_priority(struct inode *inode, struct page* page, int how) | |
470 | { | |
c42de9dd TM |
471 | int error = nfs_sync_inode_wait(inode, page->index, 1, |
472 | how | FLUSH_STABLE); | |
1da177e4 LT |
473 | return (error < 0) ? error : 0; |
474 | } | |
475 | ||
476 | static inline int nfs_wb_page(struct inode *inode, struct page* page) | |
477 | { | |
478 | return nfs_wb_page_priority(inode, page, 0); | |
479 | } | |
480 | ||
481 | /* | |
e4e20512 | 482 | * Allocate nfs_write_data structures |
1da177e4 | 483 | */ |
e9f7bee1 | 484 | extern struct nfs_write_data *nfs_writedata_alloc(size_t len); |
1da177e4 | 485 | |
1da177e4 LT |
486 | /* |
487 | * linux/fs/nfs/read.c | |
488 | */ | |
489 | extern int nfs_readpage(struct file *, struct page *); | |
490 | extern int nfs_readpages(struct file *, struct address_space *, | |
491 | struct list_head *, unsigned); | |
ec06c096 TM |
492 | extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *); |
493 | extern void nfs_readdata_release(void *data); | |
963d8fe5 | 494 | |
1da177e4 | 495 | /* |
e4e20512 | 496 | * Allocate nfs_read_data structures |
1da177e4 | 497 | */ |
e9f7bee1 | 498 | extern struct nfs_read_data *nfs_readdata_alloc(size_t len); |
1da177e4 | 499 | |
b7fa0554 AG |
500 | /* |
501 | * linux/fs/nfs3proc.c | |
502 | */ | |
503 | #ifdef CONFIG_NFS_V3_ACL | |
504 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); | |
505 | extern int nfs3_proc_setacl(struct inode *inode, int type, | |
506 | struct posix_acl *acl); | |
055ffbea AG |
507 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
508 | mode_t mode); | |
5c6a9f7d | 509 | extern void nfs3_forget_cached_acls(struct inode *inode); |
055ffbea AG |
510 | #else |
511 | static inline int nfs3_proc_set_default_acl(struct inode *dir, | |
512 | struct inode *inode, | |
513 | mode_t mode) | |
514 | { | |
515 | return 0; | |
516 | } | |
5c6a9f7d AG |
517 | |
518 | static inline void nfs3_forget_cached_acls(struct inode *inode) | |
519 | { | |
520 | } | |
b7fa0554 AG |
521 | #endif /* CONFIG_NFS_V3_ACL */ |
522 | ||
1da177e4 LT |
523 | /* |
524 | * linux/fs/mount_clnt.c | |
525 | * (Used only by nfsroot module) | |
526 | */ | |
527 | extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *, | |
528 | int, int); | |
529 | ||
530 | /* | |
531 | * inline functions | |
532 | */ | |
533 | ||
534 | static inline loff_t | |
535 | nfs_size_to_loff_t(__u64 size) | |
536 | { | |
537 | loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1; | |
538 | if (size > maxsz) | |
539 | return maxsz; | |
540 | return (loff_t) size; | |
541 | } | |
542 | ||
543 | static inline ino_t | |
544 | nfs_fileid_to_ino_t(u64 fileid) | |
545 | { | |
546 | ino_t ino = (ino_t) fileid; | |
547 | if (sizeof(ino_t) < sizeof(u64)) | |
548 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
549 | return ino; | |
550 | } | |
551 | ||
552 | /* NFS root */ | |
553 | ||
554 | extern void * nfs_root_data(void); | |
555 | ||
556 | #define nfs_wait_event(clnt, wq, condition) \ | |
557 | ({ \ | |
558 | int __retval = 0; \ | |
559 | if (clnt->cl_intr) { \ | |
560 | sigset_t oldmask; \ | |
561 | rpc_clnt_sigmask(clnt, &oldmask); \ | |
562 | __retval = wait_event_interruptible(wq, condition); \ | |
563 | rpc_clnt_sigunmask(clnt, &oldmask); \ | |
564 | } else \ | |
565 | wait_event(wq, condition); \ | |
566 | __retval; \ | |
567 | }) | |
568 | ||
569 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) | |
570 | ||
1da177e4 LT |
571 | #endif /* __KERNEL__ */ |
572 | ||
573 | /* | |
574 | * NFS debug flags | |
575 | */ | |
576 | #define NFSDBG_VFS 0x0001 | |
577 | #define NFSDBG_DIRCACHE 0x0002 | |
578 | #define NFSDBG_LOOKUPCACHE 0x0004 | |
579 | #define NFSDBG_PAGECACHE 0x0008 | |
580 | #define NFSDBG_PROC 0x0010 | |
581 | #define NFSDBG_XDR 0x0020 | |
582 | #define NFSDBG_FILE 0x0040 | |
583 | #define NFSDBG_ROOT 0x0080 | |
584 | #define NFSDBG_CALLBACK 0x0100 | |
585 | #define NFSDBG_ALL 0xFFFF | |
586 | ||
587 | #ifdef __KERNEL__ | |
588 | # undef ifdebug | |
589 | # ifdef NFS_DEBUG | |
590 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
591 | # else | |
592 | # define ifdebug(fac) if (0) | |
593 | # endif | |
594 | #endif /* __KERNEL */ | |
595 | ||
596 | #endif |