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 | ||
e18fa700 JG |
12 | #include <linux/magic.h> |
13 | ||
03bf4b70 CL |
14 | /* Default timeout values */ |
15 | #define NFS_MAX_UDP_TIMEOUT (60*HZ) | |
16 | #define NFS_MAX_TCP_TIMEOUT (600*HZ) | |
17 | ||
1da177e4 LT |
18 | /* |
19 | * When flushing a cluster of dirty pages, there can be different | |
20 | * strategies: | |
21 | */ | |
1da177e4 | 22 | #define FLUSH_SYNC 1 /* file being synced, or contention */ |
1da177e4 LT |
23 | #define FLUSH_STABLE 4 /* commit to stable storage */ |
24 | #define FLUSH_LOWPRI 8 /* low priority background flush */ | |
25 | #define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */ | |
70b9ecbd | 26 | #define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */ |
d2ccddf0 | 27 | #define FLUSH_INVALIDATE 64 /* Invalidate the page cache */ |
4d770ccf | 28 | #define FLUSH_NOWRITEPAGE 128 /* Don't call writepage() */ |
1da177e4 LT |
29 | |
30 | #ifdef __KERNEL__ | |
31 | ||
7f1cbe51 | 32 | #include <linux/in.h> |
3bec63db | 33 | #include <linux/kref.h> |
7f1cbe51 | 34 | #include <linux/mm.h> |
88be9f99 | 35 | #include <linux/namei.h> |
7f1cbe51 | 36 | #include <linux/pagemap.h> |
1c3c07e9 | 37 | #include <linux/rbtree.h> |
7f1cbe51 DW |
38 | #include <linux/rwsem.h> |
39 | #include <linux/wait.h> | |
40 | ||
41 | #include <linux/sunrpc/debug.h> | |
42 | #include <linux/sunrpc/auth.h> | |
43 | #include <linux/sunrpc/clnt.h> | |
44 | ||
45 | #include <linux/nfs.h> | |
46 | #include <linux/nfs2.h> | |
47 | #include <linux/nfs3.h> | |
48 | #include <linux/nfs4.h> | |
49 | #include <linux/nfs_xdr.h> | |
50 | ||
51 | #include <linux/nfs_fs_sb.h> | |
52 | ||
53 | #include <linux/rwsem.h> | |
54 | #include <linux/mempool.h> | |
55 | ||
56 | /* | |
57 | * These are the default flags for swap requests | |
58 | */ | |
59 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) | |
60 | ||
1da177e4 LT |
61 | /* |
62 | * NFSv3/v4 Access mode cache entry | |
63 | */ | |
64 | struct nfs_access_entry { | |
1c3c07e9 | 65 | struct rb_node rb_node; |
cfcea3e8 | 66 | struct list_head lru; |
1da177e4 LT |
67 | unsigned long jiffies; |
68 | struct rpc_cred * cred; | |
69 | int mask; | |
70 | }; | |
71 | ||
72 | struct nfs4_state; | |
73 | struct nfs_open_context { | |
5e11934d | 74 | atomic_t count; |
88be9f99 | 75 | struct path path; |
1da177e4 LT |
76 | struct rpc_cred *cred; |
77 | struct nfs4_state *state; | |
78 | fl_owner_t lockowner; | |
79 | int mode; | |
7b159fc1 TM |
80 | |
81 | unsigned long flags; | |
82 | #define NFS_CONTEXT_ERROR_WRITE (0) | |
1da177e4 LT |
83 | int error; |
84 | ||
85 | struct list_head list; | |
00a92642 | 86 | |
00a92642 | 87 | __u64 dir_cookie; |
1da177e4 LT |
88 | }; |
89 | ||
90 | /* | |
91 | * NFSv4 delegation | |
92 | */ | |
93 | struct nfs_delegation; | |
94 | ||
5c6a9f7d AG |
95 | struct posix_acl; |
96 | ||
1da177e4 LT |
97 | /* |
98 | * nfs fs inode data in memory | |
99 | */ | |
100 | struct nfs_inode { | |
101 | /* | |
102 | * The 64bit 'inode number' | |
103 | */ | |
104 | __u64 fileid; | |
105 | ||
106 | /* | |
107 | * NFS file handle | |
108 | */ | |
109 | struct nfs_fh fh; | |
110 | ||
111 | /* | |
112 | * Various flags | |
113 | */ | |
412d582e CL |
114 | unsigned long flags; /* atomic bit ops */ |
115 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
116 | |
117 | /* | |
24bd68f4 | 118 | * read_cache_jiffies is when we started read-caching this inode. |
1da177e4 LT |
119 | * attrtimeo is for how long the cached information is assumed |
120 | * to be valid. A successful attribute revalidation doubles | |
121 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
122 | * acregmin/acdirmin. | |
123 | * | |
124 | * We need to revalidate the cached attrs for this inode if | |
125 | * | |
126 | * jiffies - read_cache_jiffies > attrtimeo | |
1da177e4 | 127 | */ |
1da177e4 LT |
128 | unsigned long read_cache_jiffies; |
129 | unsigned long attrtimeo; | |
130 | unsigned long attrtimeo_timestamp; | |
131 | __u64 change_attr; /* v4 only */ | |
132 | ||
33801147 | 133 | unsigned long last_updated; |
1da177e4 LT |
134 | /* "Generation counter" for the attribute cache. This is |
135 | * bumped whenever we update the metadata on the | |
136 | * server. | |
137 | */ | |
138 | unsigned long cache_change_attribute; | |
139 | /* | |
140 | * Counter indicating the number of outstanding requests that | |
141 | * will cause a file data update. | |
142 | */ | |
143 | atomic_t data_updates; | |
144 | ||
1c3c07e9 | 145 | struct rb_root access_cache; |
cfcea3e8 TM |
146 | struct list_head access_cache_entry_lru; |
147 | struct list_head access_cache_inode_lru; | |
5c6a9f7d AG |
148 | #ifdef CONFIG_NFS_V3_ACL |
149 | struct posix_acl *acl_access; | |
150 | struct posix_acl *acl_default; | |
151 | #endif | |
1da177e4 LT |
152 | |
153 | /* | |
154 | * This is the cookie verifier used for NFSv3 readdir | |
155 | * operations | |
156 | */ | |
bc4785cd | 157 | __be32 cookieverf[2]; |
1da177e4 LT |
158 | |
159 | /* | |
160 | * This is the list of dirty unwritten pages. | |
161 | */ | |
1da177e4 LT |
162 | struct radix_tree_root nfs_page_tree; |
163 | ||
dce34ce2 | 164 | unsigned long ncommit, |
1da177e4 LT |
165 | npages; |
166 | ||
167 | /* Open contexts for shared mmap writes */ | |
168 | struct list_head open_files; | |
169 | ||
1da177e4 | 170 | #ifdef CONFIG_NFS_V4 |
e50a1c2e | 171 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
172 | /* NFSv4 state */ |
173 | struct list_head open_states; | |
174 | struct nfs_delegation *delegation; | |
175 | int delegation_state; | |
176 | struct rw_semaphore rwsem; | |
177 | #endif /* CONFIG_NFS_V4*/ | |
1da177e4 LT |
178 | struct inode vfs_inode; |
179 | }; | |
180 | ||
181 | /* | |
55296809 | 182 | * Cache validity bit flags |
1da177e4 | 183 | */ |
55296809 CL |
184 | #define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */ |
185 | #define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ | |
186 | #define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ | |
187 | #define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ | |
188 | #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ | |
189 | #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ | |
412c77ce | 190 | #define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */ |
55296809 CL |
191 | |
192 | /* | |
412d582e | 193 | * Bit offsets in flags field |
55296809 | 194 | */ |
412d582e CL |
195 | #define NFS_INO_REVALIDATING (0) /* revalidating attrs */ |
196 | #define NFS_INO_ADVISE_RDPLUS (1) /* advise readdirplus */ | |
197 | #define NFS_INO_STALE (2) /* possible stale inode */ | |
cfcea3e8 | 198 | #define NFS_INO_ACL_LRU_SET (3) /* Inode is on the LRU list */ |
1da177e4 LT |
199 | |
200 | static inline struct nfs_inode *NFS_I(struct inode *inode) | |
201 | { | |
202 | return container_of(inode, struct nfs_inode, vfs_inode); | |
203 | } | |
204 | #define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info)) | |
205 | ||
206 | #define NFS_FH(inode) (&NFS_I(inode)->fh) | |
207 | #define NFS_SERVER(inode) (NFS_SB(inode->i_sb)) | |
208 | #define NFS_CLIENT(inode) (NFS_SERVER(inode)->client) | |
8fa5c000 | 209 | #define NFS_PROTO(inode) (NFS_SERVER(inode)->nfs_client->rpc_ops) |
1da177e4 LT |
210 | #define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf) |
211 | #define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies) | |
212 | #define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr) | |
213 | #define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo) | |
214 | #define NFS_MINATTRTIMEO(inode) \ | |
215 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \ | |
216 | : NFS_SERVER(inode)->acregmin) | |
217 | #define NFS_MAXATTRTIMEO(inode) \ | |
218 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \ | |
219 | : NFS_SERVER(inode)->acregmax) | |
220 | #define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp) | |
221 | ||
222 | #define NFS_FLAGS(inode) (NFS_I(inode)->flags) | |
412d582e | 223 | #define NFS_STALE(inode) (test_bit(NFS_INO_STALE, &NFS_FLAGS(inode))) |
1da177e4 LT |
224 | |
225 | #define NFS_FILEID(inode) (NFS_I(inode)->fileid) | |
226 | ||
227 | static inline int nfs_caches_unstable(struct inode *inode) | |
228 | { | |
229 | return atomic_read(&NFS_I(inode)->data_updates) != 0; | |
230 | } | |
231 | ||
decf491f TM |
232 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
233 | { | |
38478b24 TM |
234 | struct nfs_inode *nfsi = NFS_I(inode); |
235 | ||
decf491f | 236 | spin_lock(&inode->i_lock); |
38478b24 TM |
237 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS; |
238 | if (S_ISDIR(inode->i_mode)) | |
239 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; | |
decf491f TM |
240 | spin_unlock(&inode->i_lock); |
241 | } | |
242 | ||
1da177e4 LT |
243 | static inline void NFS_CACHEINV(struct inode *inode) |
244 | { | |
decf491f TM |
245 | if (!nfs_caches_unstable(inode)) |
246 | nfs_mark_for_revalidate(inode); | |
1da177e4 LT |
247 | } |
248 | ||
249 | static inline int nfs_server_capable(struct inode *inode, int cap) | |
250 | { | |
251 | return NFS_SERVER(inode)->caps & cap; | |
252 | } | |
253 | ||
254 | static inline int NFS_USE_READDIRPLUS(struct inode *inode) | |
255 | { | |
412d582e | 256 | return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
1da177e4 LT |
257 | } |
258 | ||
259 | /** | |
260 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
261 | * @inode - pointer to inode | |
262 | * The "change attribute" is updated every time we finish an operation | |
263 | * that will result in a metadata change on the server. | |
264 | */ | |
265 | static inline long nfs_save_change_attribute(struct inode *inode) | |
266 | { | |
267 | return NFS_I(inode)->cache_change_attribute; | |
268 | } | |
269 | ||
270 | /** | |
271 | * nfs_verify_change_attribute - Detects NFS inode cache updates | |
272 | * @inode - pointer to inode | |
273 | * @chattr - previously saved change attribute | |
274 | * Return "false" if metadata has been updated (or is in the process of | |
275 | * being updated) since the change attribute was saved. | |
276 | */ | |
277 | static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr) | |
278 | { | |
279 | return !nfs_caches_unstable(inode) | |
913a70fc | 280 | && time_after_eq(chattr, NFS_I(inode)->cache_change_attribute); |
1da177e4 LT |
281 | } |
282 | ||
283 | /* | |
284 | * linux/fs/nfs/inode.c | |
285 | */ | |
29884df0 | 286 | extern int nfs_sync_mapping(struct address_space *mapping); |
cd9ae2b6 | 287 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 LT |
288 | extern void nfs_zap_caches(struct inode *); |
289 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, | |
290 | struct nfs_fattr *); | |
291 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); | |
decf491f | 292 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
1da177e4 LT |
293 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
294 | extern int nfs_permission(struct inode *, int, struct nameidata *); | |
295 | extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *); | |
296 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); | |
1c3c07e9 | 297 | extern void nfs_access_zap_cache(struct inode *inode); |
1da177e4 LT |
298 | extern int nfs_open(struct inode *, struct file *); |
299 | extern int nfs_release(struct inode *, struct file *); | |
300 | extern int nfs_attribute_timeout(struct inode *inode); | |
301 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); | |
302 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
44b11874 | 303 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
717d44e8 | 304 | extern int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping); |
1da177e4 | 305 | extern int nfs_setattr(struct dentry *, struct iattr *); |
65e4308d | 306 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); |
1da177e4 LT |
307 | extern void nfs_begin_attr_update(struct inode *); |
308 | extern void nfs_end_attr_update(struct inode *); | |
309 | extern void nfs_begin_data_update(struct inode *); | |
310 | extern void nfs_end_data_update(struct inode *); | |
1da177e4 LT |
311 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
312 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
d530838b | 313 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode); |
1da177e4 LT |
314 | |
315 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ | |
5a874db4 | 316 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
1da177e4 | 317 | |
0e574af1 TM |
318 | static inline void nfs_fattr_init(struct nfs_fattr *fattr) |
319 | { | |
320 | fattr->valid = 0; | |
33801147 | 321 | fattr->time_start = jiffies; |
0e574af1 TM |
322 | } |
323 | ||
1da177e4 LT |
324 | /* |
325 | * linux/fs/nfs/file.c | |
326 | */ | |
c5ef1c42 | 327 | extern const struct inode_operations nfs_file_inode_operations; |
b7fa0554 | 328 | #ifdef CONFIG_NFS_V3 |
c5ef1c42 | 329 | extern const struct inode_operations nfs3_file_inode_operations; |
b7fa0554 | 330 | #endif /* CONFIG_NFS_V3 */ |
4b6f5d20 | 331 | extern const struct file_operations nfs_file_operations; |
f5e54d6e | 332 | extern const struct address_space_operations nfs_file_aops; |
1da177e4 | 333 | |
c03025d5 TM |
334 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
335 | { | |
336 | return filp->private_data; | |
337 | } | |
338 | ||
1da177e4 LT |
339 | static inline struct rpc_cred *nfs_file_cred(struct file *file) |
340 | { | |
341 | if (file != NULL) { | |
342 | struct nfs_open_context *ctx; | |
343 | ||
344 | ctx = (struct nfs_open_context*)file->private_data; | |
345 | return ctx->cred; | |
346 | } | |
347 | return NULL; | |
348 | } | |
349 | ||
b7fa0554 AG |
350 | /* |
351 | * linux/fs/nfs/xattr.c | |
352 | */ | |
353 | #ifdef CONFIG_NFS_V3_ACL | |
354 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); | |
355 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); | |
356 | extern int nfs3_setxattr(struct dentry *, const char *, | |
357 | const void *, size_t, int); | |
358 | extern int nfs3_removexattr (struct dentry *, const char *name); | |
359 | #else | |
360 | # define nfs3_listxattr NULL | |
361 | # define nfs3_getxattr NULL | |
362 | # define nfs3_setxattr NULL | |
363 | # define nfs3_removexattr NULL | |
364 | #endif | |
365 | ||
1da177e4 LT |
366 | /* |
367 | * linux/fs/nfs/direct.c | |
368 | */ | |
369 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, | |
370 | unsigned long); | |
027445c3 BP |
371 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, |
372 | const struct iovec *iov, unsigned long nr_segs, | |
373 | loff_t pos); | |
374 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, | |
375 | const struct iovec *iov, unsigned long nr_segs, | |
376 | loff_t pos); | |
1da177e4 LT |
377 | |
378 | /* | |
379 | * linux/fs/nfs/dir.c | |
380 | */ | |
c5ef1c42 | 381 | extern const struct inode_operations nfs_dir_inode_operations; |
b7fa0554 | 382 | #ifdef CONFIG_NFS_V3 |
c5ef1c42 | 383 | extern const struct inode_operations nfs3_dir_inode_operations; |
b7fa0554 | 384 | #endif /* CONFIG_NFS_V3 */ |
4b6f5d20 | 385 | extern const struct file_operations nfs_dir_operations; |
1da177e4 LT |
386 | extern struct dentry_operations nfs_dentry_operations; |
387 | ||
388 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); | |
389 | ||
390 | /* | |
391 | * linux/fs/nfs/symlink.c | |
392 | */ | |
c5ef1c42 | 393 | extern const struct inode_operations nfs_symlink_inode_operations; |
1da177e4 | 394 | |
a72b4422 TM |
395 | /* |
396 | * linux/fs/nfs/sysctl.c | |
397 | */ | |
398 | #ifdef CONFIG_SYSCTL | |
399 | extern int nfs_register_sysctl(void); | |
400 | extern void nfs_unregister_sysctl(void); | |
401 | #else | |
7fd105e7 | 402 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
403 | #define nfs_unregister_sysctl() do { } while(0) |
404 | #endif | |
405 | ||
55a97593 TM |
406 | /* |
407 | * linux/fs/nfs/namespace.c | |
408 | */ | |
51d8fa6a | 409 | extern struct list_head nfs_automount_list; |
c5ef1c42 AV |
410 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
411 | extern const struct inode_operations nfs_referral_inode_operations; | |
51d8fa6a TM |
412 | extern int nfs_mountpoint_expiry_timeout; |
413 | extern void nfs_release_automount_timer(void); | |
55a97593 | 414 | |
1da177e4 LT |
415 | /* |
416 | * linux/fs/nfs/unlink.c | |
417 | */ | |
e4eff1a6 TM |
418 | extern int nfs_async_unlink(struct inode *dir, struct dentry *dentry); |
419 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); | |
1da177e4 LT |
420 | |
421 | /* | |
422 | * linux/fs/nfs/write.c | |
423 | */ | |
89a09141 | 424 | extern int nfs_congestion_kb; |
1da177e4 LT |
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 LT |
431 | |
432 | /* | |
433 | * Try to write back everything synchronously (but check the | |
434 | * return value!) | |
435 | */ | |
1c75950b | 436 | extern long nfs_sync_mapping_wait(struct address_space *, struct writeback_control *, int); |
1c75950b | 437 | extern int nfs_wb_all(struct inode *inode); |
ed90ef51 | 438 | extern int nfs_wb_nocommit(struct inode *inode); |
1c75950b | 439 | extern int nfs_wb_page(struct inode *inode, struct page* page); |
61822ab5 | 440 | extern int nfs_wb_page_priority(struct inode *inode, struct page* page, int how); |
1b3b4a1a | 441 | extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); |
1da177e4 | 442 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
3da28eb1 | 443 | extern int nfs_commit_inode(struct inode *, int); |
8aca67f0 TM |
444 | extern struct nfs_write_data *nfs_commit_alloc(void); |
445 | extern void nfs_commit_free(struct nfs_write_data *wdata); | |
fad61490 | 446 | extern void nfs_commit_release(void *wdata); |
1da177e4 LT |
447 | #else |
448 | static inline int | |
3da28eb1 | 449 | nfs_commit_inode(struct inode *inode, int how) |
1da177e4 LT |
450 | { |
451 | return 0; | |
452 | } | |
453 | #endif | |
454 | ||
455 | static inline int | |
456 | nfs_have_writebacks(struct inode *inode) | |
457 | { | |
458 | return NFS_I(inode)->npages != 0; | |
459 | } | |
460 | ||
1da177e4 | 461 | /* |
e4e20512 | 462 | * Allocate nfs_write_data structures |
1da177e4 | 463 | */ |
8d5658c9 | 464 | extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages); |
1da177e4 | 465 | |
1da177e4 LT |
466 | /* |
467 | * linux/fs/nfs/read.c | |
468 | */ | |
469 | extern int nfs_readpage(struct file *, struct page *); | |
470 | extern int nfs_readpages(struct file *, struct address_space *, | |
471 | struct list_head *, unsigned); | |
ec06c096 TM |
472 | extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *); |
473 | extern void nfs_readdata_release(void *data); | |
963d8fe5 | 474 | |
1da177e4 | 475 | /* |
e4e20512 | 476 | * Allocate nfs_read_data structures |
1da177e4 | 477 | */ |
8d5658c9 | 478 | extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages); |
1da177e4 | 479 | |
b7fa0554 AG |
480 | /* |
481 | * linux/fs/nfs3proc.c | |
482 | */ | |
483 | #ifdef CONFIG_NFS_V3_ACL | |
484 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); | |
485 | extern int nfs3_proc_setacl(struct inode *inode, int type, | |
486 | struct posix_acl *acl); | |
055ffbea AG |
487 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
488 | mode_t mode); | |
5c6a9f7d | 489 | extern void nfs3_forget_cached_acls(struct inode *inode); |
055ffbea AG |
490 | #else |
491 | static inline int nfs3_proc_set_default_acl(struct inode *dir, | |
492 | struct inode *inode, | |
493 | mode_t mode) | |
494 | { | |
495 | return 0; | |
496 | } | |
5c6a9f7d AG |
497 | |
498 | static inline void nfs3_forget_cached_acls(struct inode *inode) | |
499 | { | |
500 | } | |
b7fa0554 AG |
501 | #endif /* CONFIG_NFS_V3_ACL */ |
502 | ||
1da177e4 LT |
503 | /* |
504 | * linux/fs/mount_clnt.c | |
1da177e4 | 505 | */ |
3ea97309 CL |
506 | extern int nfs_mount(struct sockaddr *, size_t, char *, char *, |
507 | int, int, struct nfs_fh *); | |
1da177e4 LT |
508 | |
509 | /* | |
510 | * inline functions | |
511 | */ | |
512 | ||
433c9237 | 513 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
1da177e4 | 514 | { |
433c9237 CL |
515 | if (size > (__u64) OFFSET_MAX - 1) |
516 | return OFFSET_MAX - 1; | |
1da177e4 LT |
517 | return (loff_t) size; |
518 | } | |
519 | ||
520 | static inline ino_t | |
521 | nfs_fileid_to_ino_t(u64 fileid) | |
522 | { | |
523 | ino_t ino = (ino_t) fileid; | |
524 | if (sizeof(ino_t) < sizeof(u64)) | |
525 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
526 | return ino; | |
527 | } | |
528 | ||
529 | /* NFS root */ | |
530 | ||
531 | extern void * nfs_root_data(void); | |
532 | ||
533 | #define nfs_wait_event(clnt, wq, condition) \ | |
534 | ({ \ | |
535 | int __retval = 0; \ | |
536 | if (clnt->cl_intr) { \ | |
537 | sigset_t oldmask; \ | |
538 | rpc_clnt_sigmask(clnt, &oldmask); \ | |
539 | __retval = wait_event_interruptible(wq, condition); \ | |
540 | rpc_clnt_sigunmask(clnt, &oldmask); \ | |
541 | } else \ | |
542 | wait_event(wq, condition); \ | |
543 | __retval; \ | |
544 | }) | |
545 | ||
546 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) | |
547 | ||
1da177e4 LT |
548 | #endif /* __KERNEL__ */ |
549 | ||
550 | /* | |
551 | * NFS debug flags | |
552 | */ | |
553 | #define NFSDBG_VFS 0x0001 | |
554 | #define NFSDBG_DIRCACHE 0x0002 | |
555 | #define NFSDBG_LOOKUPCACHE 0x0004 | |
556 | #define NFSDBG_PAGECACHE 0x0008 | |
557 | #define NFSDBG_PROC 0x0010 | |
558 | #define NFSDBG_XDR 0x0020 | |
559 | #define NFSDBG_FILE 0x0040 | |
560 | #define NFSDBG_ROOT 0x0080 | |
561 | #define NFSDBG_CALLBACK 0x0100 | |
24c8dbbb | 562 | #define NFSDBG_CLIENT 0x0200 |
f1828993 | 563 | #define NFSDBG_MOUNT 0x0400 |
1da177e4 LT |
564 | #define NFSDBG_ALL 0xFFFF |
565 | ||
566 | #ifdef __KERNEL__ | |
4dc2eaec BH |
567 | |
568 | /* | |
569 | * Enable debugging support for nfs client. | |
570 | * Requires RPC_DEBUG. | |
571 | */ | |
572 | #ifdef RPC_DEBUG | |
573 | # define NFS_DEBUG | |
574 | #endif | |
575 | ||
1da177e4 LT |
576 | # undef ifdebug |
577 | # ifdef NFS_DEBUG | |
578 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
579 | # else | |
580 | # define ifdebug(fac) if (0) | |
581 | # endif | |
582 | #endif /* __KERNEL */ | |
583 | ||
584 | #endif |