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 | 14 | /* Default timeout values */ |
259875ef TM |
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 | ||
03bf4b70 CL |
20 | #define NFS_MAX_UDP_TIMEOUT (60*HZ) |
21 | #define NFS_MAX_TCP_TIMEOUT (600*HZ) | |
22 | ||
0e0cab74 CL |
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 | ||
1da177e4 LT |
28 | /* |
29 | * When flushing a cluster of dirty pages, there can be different | |
30 | * strategies: | |
31 | */ | |
1da177e4 | 32 | #define FLUSH_SYNC 1 /* file being synced, or contention */ |
1da177e4 LT |
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 */ | |
70b9ecbd | 36 | #define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */ |
d2ccddf0 | 37 | #define FLUSH_INVALIDATE 64 /* Invalidate the page cache */ |
4d770ccf | 38 | #define FLUSH_NOWRITEPAGE 128 /* Don't call writepage() */ |
1da177e4 LT |
39 | |
40 | #ifdef __KERNEL__ | |
41 | ||
7f1cbe51 | 42 | #include <linux/in.h> |
3bec63db | 43 | #include <linux/kref.h> |
7f1cbe51 DW |
44 | #include <linux/mm.h> |
45 | #include <linux/pagemap.h> | |
1c3c07e9 | 46 | #include <linux/rbtree.h> |
7f1cbe51 DW |
47 | #include <linux/rwsem.h> |
48 | #include <linux/wait.h> | |
49 | ||
50 | #include <linux/sunrpc/debug.h> | |
51 | #include <linux/sunrpc/auth.h> | |
52 | #include <linux/sunrpc/clnt.h> | |
53 | ||
54 | #include <linux/nfs.h> | |
55 | #include <linux/nfs2.h> | |
56 | #include <linux/nfs3.h> | |
57 | #include <linux/nfs4.h> | |
58 | #include <linux/nfs_xdr.h> | |
7f1cbe51 DW |
59 | #include <linux/nfs_fs_sb.h> |
60 | ||
7f1cbe51 DW |
61 | #include <linux/mempool.h> |
62 | ||
63 | /* | |
64 | * These are the default flags for swap requests | |
65 | */ | |
66 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) | |
67 | ||
1da177e4 LT |
68 | /* |
69 | * NFSv3/v4 Access mode cache entry | |
70 | */ | |
71 | struct nfs_access_entry { | |
1c3c07e9 | 72 | struct rb_node rb_node; |
cfcea3e8 | 73 | struct list_head lru; |
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 { | |
5e11934d | 81 | atomic_t count; |
88be9f99 | 82 | struct path path; |
1da177e4 LT |
83 | struct rpc_cred *cred; |
84 | struct nfs4_state *state; | |
85 | fl_owner_t lockowner; | |
86 | int mode; | |
7b159fc1 TM |
87 | |
88 | unsigned long flags; | |
89 | #define NFS_CONTEXT_ERROR_WRITE (0) | |
1da177e4 LT |
90 | int error; |
91 | ||
92 | struct list_head list; | |
00a92642 | 93 | |
00a92642 | 94 | __u64 dir_cookie; |
1da177e4 LT |
95 | }; |
96 | ||
97 | /* | |
98 | * NFSv4 delegation | |
99 | */ | |
100 | struct nfs_delegation; | |
101 | ||
5c6a9f7d AG |
102 | struct posix_acl; |
103 | ||
1da177e4 LT |
104 | /* |
105 | * nfs fs inode data in memory | |
106 | */ | |
107 | struct nfs_inode { | |
108 | /* | |
109 | * The 64bit 'inode number' | |
110 | */ | |
111 | __u64 fileid; | |
112 | ||
113 | /* | |
114 | * NFS file handle | |
115 | */ | |
116 | struct nfs_fh fh; | |
117 | ||
118 | /* | |
119 | * Various flags | |
120 | */ | |
412d582e CL |
121 | unsigned long flags; /* atomic bit ops */ |
122 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
123 | |
124 | /* | |
24bd68f4 | 125 | * read_cache_jiffies is when we started read-caching this inode. |
1da177e4 LT |
126 | * attrtimeo is for how long the cached information is assumed |
127 | * to be valid. A successful attribute revalidation doubles | |
128 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
129 | * acregmin/acdirmin. | |
130 | * | |
131 | * We need to revalidate the cached attrs for this inode if | |
132 | * | |
133 | * jiffies - read_cache_jiffies > attrtimeo | |
1da177e4 | 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 | ||
33801147 | 140 | unsigned long last_updated; |
1da177e4 LT |
141 | /* "Generation counter" for the attribute cache. This is |
142 | * bumped whenever we update the metadata on the | |
143 | * server. | |
144 | */ | |
145 | unsigned long cache_change_attribute; | |
1da177e4 | 146 | |
1c3c07e9 | 147 | struct rb_root access_cache; |
cfcea3e8 TM |
148 | struct list_head access_cache_entry_lru; |
149 | struct list_head access_cache_inode_lru; | |
5c6a9f7d AG |
150 | #ifdef CONFIG_NFS_V3_ACL |
151 | struct posix_acl *acl_access; | |
152 | struct posix_acl *acl_default; | |
153 | #endif | |
1da177e4 LT |
154 | |
155 | /* | |
156 | * This is the cookie verifier used for NFSv3 readdir | |
157 | * operations | |
158 | */ | |
bc4785cd | 159 | __be32 cookieverf[2]; |
1da177e4 LT |
160 | |
161 | /* | |
162 | * This is the list of dirty unwritten pages. | |
163 | */ | |
1da177e4 LT |
164 | struct radix_tree_root nfs_page_tree; |
165 | ||
dce34ce2 | 166 | unsigned long ncommit, |
1da177e4 LT |
167 | npages; |
168 | ||
169 | /* Open contexts for shared mmap writes */ | |
170 | struct list_head open_files; | |
171 | ||
565277f6 TM |
172 | /* Number of in-flight sillydelete RPC calls */ |
173 | atomic_t silly_count; | |
174 | /* List of deferred sillydelete requests */ | |
175 | struct hlist_head silly_list; | |
176 | wait_queue_head_t waitqueue; | |
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 */ | |
412c77ce | 198 | #define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */ |
55296809 CL |
199 | |
200 | /* | |
412d582e | 201 | * Bit offsets in flags field |
55296809 | 202 | */ |
412d582e CL |
203 | #define NFS_INO_REVALIDATING (0) /* revalidating attrs */ |
204 | #define NFS_INO_ADVISE_RDPLUS (1) /* advise readdirplus */ | |
205 | #define NFS_INO_STALE (2) /* possible stale inode */ | |
cfcea3e8 | 206 | #define NFS_INO_ACL_LRU_SET (3) /* Inode is on the LRU list */ |
c37dcd33 | 207 | #define NFS_INO_MOUNTPOINT (4) /* inode is remote mountpoint */ |
1da177e4 | 208 | |
99fadcd7 | 209 | static inline struct nfs_inode *NFS_I(const struct inode *inode) |
1da177e4 LT |
210 | { |
211 | return container_of(inode, struct nfs_inode, vfs_inode); | |
212 | } | |
99fadcd7 BH |
213 | |
214 | static inline struct nfs_server *NFS_SB(const struct super_block *s) | |
215 | { | |
216 | return (struct nfs_server *)(s->s_fs_info); | |
217 | } | |
218 | ||
219 | static inline struct nfs_fh *NFS_FH(const struct inode *inode) | |
220 | { | |
221 | return &NFS_I(inode)->fh; | |
222 | } | |
223 | ||
224 | static inline struct nfs_server *NFS_SERVER(const struct inode *inode) | |
225 | { | |
226 | return NFS_SB(inode->i_sb); | |
227 | } | |
228 | ||
229 | static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) | |
230 | { | |
231 | return NFS_SERVER(inode)->client; | |
232 | } | |
233 | ||
234 | static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) | |
235 | { | |
236 | return NFS_SERVER(inode)->nfs_client->rpc_ops; | |
237 | } | |
238 | ||
239 | static inline __be32 *NFS_COOKIEVERF(const struct inode *inode) | |
240 | { | |
241 | return NFS_I(inode)->cookieverf; | |
242 | } | |
243 | ||
244 | static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) | |
245 | { | |
246 | struct nfs_server *nfss = NFS_SERVER(inode); | |
247 | return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; | |
248 | } | |
249 | ||
250 | static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) | |
251 | { | |
252 | struct nfs_server *nfss = NFS_SERVER(inode); | |
253 | return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; | |
254 | } | |
255 | ||
256 | static inline int NFS_STALE(const struct inode *inode) | |
257 | { | |
258 | return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); | |
259 | } | |
260 | ||
261 | static inline __u64 NFS_FILEID(const struct inode *inode) | |
262 | { | |
263 | return NFS_I(inode)->fileid; | |
264 | } | |
265 | ||
266 | static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) | |
267 | { | |
268 | NFS_I(inode)->fileid = fileid; | |
269 | } | |
1da177e4 | 270 | |
decf491f TM |
271 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
272 | { | |
38478b24 TM |
273 | struct nfs_inode *nfsi = NFS_I(inode); |
274 | ||
decf491f | 275 | spin_lock(&inode->i_lock); |
38478b24 | 276 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS; |
f3821110 | 277 | if (S_ISDIR(inode->i_mode)) |
38478b24 | 278 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
decf491f TM |
279 | spin_unlock(&inode->i_lock); |
280 | } | |
281 | ||
1da177e4 LT |
282 | static inline int nfs_server_capable(struct inode *inode, int cap) |
283 | { | |
284 | return NFS_SERVER(inode)->caps & cap; | |
285 | } | |
286 | ||
287 | static inline int NFS_USE_READDIRPLUS(struct inode *inode) | |
288 | { | |
3a10c30a | 289 | return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
1da177e4 LT |
290 | } |
291 | ||
d75340cc TM |
292 | static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) |
293 | { | |
294 | dentry->d_time = verf; | |
295 | } | |
296 | ||
1da177e4 LT |
297 | /** |
298 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
8edb0182 | 299 | * @dir - pointer to parent directory inode |
1da177e4 LT |
300 | * The "change attribute" is updated every time we finish an operation |
301 | * that will result in a metadata change on the server. | |
302 | */ | |
8edb0182 | 303 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
1da177e4 | 304 | { |
8edb0182 | 305 | return NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
306 | } |
307 | ||
308 | /** | |
4b841736 TM |
309 | * nfs_verify_change_attribute - Detects NFS remote directory changes |
310 | * @dir - pointer to parent directory inode | |
1da177e4 | 311 | * @chattr - previously saved change attribute |
4b841736 TM |
312 | * Return "false" if the verifiers doesn't match the change attribute. |
313 | * This would usually indicate that the directory contents have changed on | |
314 | * the server, and that any dentries need revalidating. | |
1da177e4 | 315 | */ |
4b841736 | 316 | static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr) |
1da177e4 | 317 | { |
4b841736 | 318 | return chattr == NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
319 | } |
320 | ||
321 | /* | |
322 | * linux/fs/nfs/inode.c | |
323 | */ | |
29884df0 | 324 | extern int nfs_sync_mapping(struct address_space *mapping); |
cd9ae2b6 | 325 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 326 | extern void nfs_zap_caches(struct inode *); |
c4812998 | 327 | extern void nfs_invalidate_atime(struct inode *); |
1da177e4 LT |
328 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
329 | struct nfs_fattr *); | |
330 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); | |
decf491f | 331 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
70ca8852 | 332 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
1da177e4 | 333 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
e6305c43 | 334 | extern int nfs_permission(struct inode *, int); |
1da177e4 LT |
335 | extern int nfs_open(struct inode *, struct file *); |
336 | extern int nfs_release(struct inode *, struct file *); | |
337 | extern int nfs_attribute_timeout(struct inode *inode); | |
338 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); | |
339 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
44b11874 | 340 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
717d44e8 | 341 | extern int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping); |
1da177e4 | 342 | extern int nfs_setattr(struct dentry *, struct iattr *); |
65e4308d | 343 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); |
1da177e4 LT |
344 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
345 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
d530838b | 346 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode); |
f43bf0be | 347 | extern u64 nfs_compat_user_ino64(u64 fileid); |
1da177e4 LT |
348 | |
349 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ | |
5a874db4 | 350 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
1da177e4 | 351 | |
0e574af1 TM |
352 | static inline void nfs_fattr_init(struct nfs_fattr *fattr) |
353 | { | |
354 | fattr->valid = 0; | |
33801147 | 355 | fattr->time_start = jiffies; |
0e574af1 TM |
356 | } |
357 | ||
1da177e4 LT |
358 | /* |
359 | * linux/fs/nfs/file.c | |
360 | */ | |
c5ef1c42 | 361 | extern const struct inode_operations nfs_file_inode_operations; |
b7fa0554 | 362 | #ifdef CONFIG_NFS_V3 |
c5ef1c42 | 363 | extern const struct inode_operations nfs3_file_inode_operations; |
b7fa0554 | 364 | #endif /* CONFIG_NFS_V3 */ |
4b6f5d20 | 365 | extern const struct file_operations nfs_file_operations; |
f5e54d6e | 366 | extern const struct address_space_operations nfs_file_aops; |
1da177e4 | 367 | |
c03025d5 TM |
368 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
369 | { | |
370 | return filp->private_data; | |
371 | } | |
372 | ||
1da177e4 LT |
373 | static inline struct rpc_cred *nfs_file_cred(struct file *file) |
374 | { | |
cd3758e3 TM |
375 | if (file != NULL) |
376 | return nfs_file_open_context(file)->cred; | |
1da177e4 LT |
377 | return NULL; |
378 | } | |
379 | ||
b7fa0554 AG |
380 | /* |
381 | * linux/fs/nfs/xattr.c | |
382 | */ | |
383 | #ifdef CONFIG_NFS_V3_ACL | |
384 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); | |
385 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); | |
386 | extern int nfs3_setxattr(struct dentry *, const char *, | |
387 | const void *, size_t, int); | |
388 | extern int nfs3_removexattr (struct dentry *, const char *name); | |
389 | #else | |
390 | # define nfs3_listxattr NULL | |
391 | # define nfs3_getxattr NULL | |
392 | # define nfs3_setxattr NULL | |
393 | # define nfs3_removexattr NULL | |
394 | #endif | |
395 | ||
1da177e4 LT |
396 | /* |
397 | * linux/fs/nfs/direct.c | |
398 | */ | |
399 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, | |
400 | unsigned long); | |
027445c3 BP |
401 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, |
402 | const struct iovec *iov, unsigned long nr_segs, | |
403 | loff_t pos); | |
404 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, | |
405 | const struct iovec *iov, unsigned long nr_segs, | |
406 | loff_t pos); | |
1da177e4 LT |
407 | |
408 | /* | |
409 | * linux/fs/nfs/dir.c | |
410 | */ | |
c5ef1c42 | 411 | extern const struct inode_operations nfs_dir_inode_operations; |
b7fa0554 | 412 | #ifdef CONFIG_NFS_V3 |
c5ef1c42 | 413 | extern const struct inode_operations nfs3_dir_inode_operations; |
b7fa0554 | 414 | #endif /* CONFIG_NFS_V3 */ |
4b6f5d20 | 415 | extern const struct file_operations nfs_dir_operations; |
1da177e4 LT |
416 | extern struct dentry_operations nfs_dentry_operations; |
417 | ||
bfc69a45 | 418 | extern void nfs_force_lookup_revalidate(struct inode *dir); |
1da177e4 | 419 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); |
af22f94a TM |
420 | extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags); |
421 | extern void nfs_access_zap_cache(struct inode *inode); | |
1da177e4 LT |
422 | |
423 | /* | |
424 | * linux/fs/nfs/symlink.c | |
425 | */ | |
c5ef1c42 | 426 | extern const struct inode_operations nfs_symlink_inode_operations; |
1da177e4 | 427 | |
a72b4422 TM |
428 | /* |
429 | * linux/fs/nfs/sysctl.c | |
430 | */ | |
431 | #ifdef CONFIG_SYSCTL | |
432 | extern int nfs_register_sysctl(void); | |
433 | extern void nfs_unregister_sysctl(void); | |
434 | #else | |
7fd105e7 | 435 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
436 | #define nfs_unregister_sysctl() do { } while(0) |
437 | #endif | |
438 | ||
55a97593 TM |
439 | /* |
440 | * linux/fs/nfs/namespace.c | |
441 | */ | |
c5ef1c42 AV |
442 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
443 | extern const struct inode_operations nfs_referral_inode_operations; | |
51d8fa6a TM |
444 | extern int nfs_mountpoint_expiry_timeout; |
445 | extern void nfs_release_automount_timer(void); | |
55a97593 | 446 | |
1da177e4 LT |
447 | /* |
448 | * linux/fs/nfs/unlink.c | |
449 | */ | |
e4eff1a6 TM |
450 | extern int nfs_async_unlink(struct inode *dir, struct dentry *dentry); |
451 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); | |
565277f6 TM |
452 | extern void nfs_block_sillyrename(struct dentry *dentry); |
453 | extern void nfs_unblock_sillyrename(struct dentry *dentry); | |
1da177e4 LT |
454 | |
455 | /* | |
456 | * linux/fs/nfs/write.c | |
457 | */ | |
89a09141 | 458 | extern int nfs_congestion_kb; |
1da177e4 LT |
459 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
460 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
461 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
462 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
462d5b32 CL |
463 | extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *); |
464 | extern void nfs_writedata_release(void *); | |
1da177e4 LT |
465 | |
466 | /* | |
467 | * Try to write back everything synchronously (but check the | |
468 | * return value!) | |
469 | */ | |
1c75950b | 470 | extern long nfs_sync_mapping_wait(struct address_space *, struct writeback_control *, int); |
1c75950b | 471 | extern int nfs_wb_all(struct inode *inode); |
ed90ef51 | 472 | extern int nfs_wb_nocommit(struct inode *inode); |
1c75950b | 473 | extern int nfs_wb_page(struct inode *inode, struct page* page); |
1b3b4a1a | 474 | extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); |
1da177e4 | 475 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
3da28eb1 | 476 | extern int nfs_commit_inode(struct inode *, int); |
c9d8f89d | 477 | extern struct nfs_write_data *nfs_commitdata_alloc(void); |
8aca67f0 | 478 | extern void nfs_commit_free(struct nfs_write_data *wdata); |
c9d8f89d | 479 | extern void nfs_commitdata_release(void *wdata); |
1da177e4 LT |
480 | #else |
481 | static inline int | |
3da28eb1 | 482 | nfs_commit_inode(struct inode *inode, int how) |
1da177e4 LT |
483 | { |
484 | return 0; | |
485 | } | |
486 | #endif | |
487 | ||
488 | static inline int | |
489 | nfs_have_writebacks(struct inode *inode) | |
490 | { | |
491 | return NFS_I(inode)->npages != 0; | |
492 | } | |
493 | ||
1da177e4 | 494 | /* |
e4e20512 | 495 | * Allocate nfs_write_data structures |
1da177e4 | 496 | */ |
8d5658c9 | 497 | extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages); |
1da177e4 | 498 | |
1da177e4 LT |
499 | /* |
500 | * linux/fs/nfs/read.c | |
501 | */ | |
502 | extern int nfs_readpage(struct file *, struct page *); | |
503 | extern int nfs_readpages(struct file *, struct address_space *, | |
504 | struct list_head *, unsigned); | |
ec06c096 TM |
505 | extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *); |
506 | extern void nfs_readdata_release(void *data); | |
963d8fe5 | 507 | |
1da177e4 | 508 | /* |
e4e20512 | 509 | * Allocate nfs_read_data structures |
1da177e4 | 510 | */ |
8d5658c9 | 511 | extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages); |
1da177e4 | 512 | |
b7fa0554 AG |
513 | /* |
514 | * linux/fs/nfs3proc.c | |
515 | */ | |
516 | #ifdef CONFIG_NFS_V3_ACL | |
517 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); | |
518 | extern int nfs3_proc_setacl(struct inode *inode, int type, | |
519 | struct posix_acl *acl); | |
055ffbea AG |
520 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
521 | mode_t mode); | |
5c6a9f7d | 522 | extern void nfs3_forget_cached_acls(struct inode *inode); |
055ffbea AG |
523 | #else |
524 | static inline int nfs3_proc_set_default_acl(struct inode *dir, | |
525 | struct inode *inode, | |
526 | mode_t mode) | |
527 | { | |
528 | return 0; | |
529 | } | |
5c6a9f7d AG |
530 | |
531 | static inline void nfs3_forget_cached_acls(struct inode *inode) | |
532 | { | |
533 | } | |
b7fa0554 AG |
534 | #endif /* CONFIG_NFS_V3_ACL */ |
535 | ||
1da177e4 LT |
536 | /* |
537 | * linux/fs/mount_clnt.c | |
1da177e4 | 538 | */ |
3ea97309 CL |
539 | extern int nfs_mount(struct sockaddr *, size_t, char *, char *, |
540 | int, int, struct nfs_fh *); | |
1da177e4 LT |
541 | |
542 | /* | |
543 | * inline functions | |
544 | */ | |
545 | ||
433c9237 | 546 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
1da177e4 | 547 | { |
433c9237 CL |
548 | if (size > (__u64) OFFSET_MAX - 1) |
549 | return OFFSET_MAX - 1; | |
1da177e4 LT |
550 | return (loff_t) size; |
551 | } | |
552 | ||
553 | static inline ino_t | |
554 | nfs_fileid_to_ino_t(u64 fileid) | |
555 | { | |
556 | ino_t ino = (ino_t) fileid; | |
557 | if (sizeof(ino_t) < sizeof(u64)) | |
558 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
559 | return ino; | |
560 | } | |
561 | ||
562 | /* NFS root */ | |
563 | ||
564 | extern void * nfs_root_data(void); | |
565 | ||
566 | #define nfs_wait_event(clnt, wq, condition) \ | |
567 | ({ \ | |
150030b7 | 568 | int __retval = wait_event_killable(wq, condition); \ |
1da177e4 LT |
569 | __retval; \ |
570 | }) | |
571 | ||
572 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) | |
573 | ||
1da177e4 LT |
574 | #endif /* __KERNEL__ */ |
575 | ||
576 | /* | |
577 | * NFS debug flags | |
578 | */ | |
579 | #define NFSDBG_VFS 0x0001 | |
580 | #define NFSDBG_DIRCACHE 0x0002 | |
581 | #define NFSDBG_LOOKUPCACHE 0x0004 | |
582 | #define NFSDBG_PAGECACHE 0x0008 | |
583 | #define NFSDBG_PROC 0x0010 | |
584 | #define NFSDBG_XDR 0x0020 | |
585 | #define NFSDBG_FILE 0x0040 | |
586 | #define NFSDBG_ROOT 0x0080 | |
587 | #define NFSDBG_CALLBACK 0x0100 | |
24c8dbbb | 588 | #define NFSDBG_CLIENT 0x0200 |
f1828993 | 589 | #define NFSDBG_MOUNT 0x0400 |
1da177e4 LT |
590 | #define NFSDBG_ALL 0xFFFF |
591 | ||
592 | #ifdef __KERNEL__ | |
4dc2eaec BH |
593 | |
594 | /* | |
595 | * Enable debugging support for nfs client. | |
596 | * Requires RPC_DEBUG. | |
597 | */ | |
598 | #ifdef RPC_DEBUG | |
599 | # define NFS_DEBUG | |
600 | #endif | |
601 | ||
1da177e4 LT |
602 | # undef ifdebug |
603 | # ifdef NFS_DEBUG | |
604 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
605 | # else | |
606 | # define ifdebug(fac) if (0) | |
607 | # endif | |
608 | #endif /* __KERNEL */ | |
609 | ||
610 | #endif |