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 | ||
4704f0e2 | 140 | unsigned long attr_gencount; |
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; | |
bd7bf9d5 | 183 | fmode_t delegation_state; |
1da177e4 LT |
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 | */ |
691beb13 TM |
203 | #define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */ |
204 | #define NFS_INO_STALE (1) /* possible stale inode */ | |
205 | #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ | |
206 | #define NFS_INO_MOUNTPOINT (3) /* inode is remote mountpoint */ | |
1da177e4 | 207 | |
99fadcd7 | 208 | static inline struct nfs_inode *NFS_I(const struct inode *inode) |
1da177e4 LT |
209 | { |
210 | return container_of(inode, struct nfs_inode, vfs_inode); | |
211 | } | |
99fadcd7 BH |
212 | |
213 | static inline struct nfs_server *NFS_SB(const struct super_block *s) | |
214 | { | |
215 | return (struct nfs_server *)(s->s_fs_info); | |
216 | } | |
217 | ||
218 | static inline struct nfs_fh *NFS_FH(const struct inode *inode) | |
219 | { | |
220 | return &NFS_I(inode)->fh; | |
221 | } | |
222 | ||
223 | static inline struct nfs_server *NFS_SERVER(const struct inode *inode) | |
224 | { | |
225 | return NFS_SB(inode->i_sb); | |
226 | } | |
227 | ||
228 | static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) | |
229 | { | |
230 | return NFS_SERVER(inode)->client; | |
231 | } | |
232 | ||
233 | static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) | |
234 | { | |
235 | return NFS_SERVER(inode)->nfs_client->rpc_ops; | |
236 | } | |
237 | ||
238 | static inline __be32 *NFS_COOKIEVERF(const struct inode *inode) | |
239 | { | |
240 | return NFS_I(inode)->cookieverf; | |
241 | } | |
242 | ||
243 | static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) | |
244 | { | |
245 | struct nfs_server *nfss = NFS_SERVER(inode); | |
246 | return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; | |
247 | } | |
248 | ||
249 | static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) | |
250 | { | |
251 | struct nfs_server *nfss = NFS_SERVER(inode); | |
252 | return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; | |
253 | } | |
254 | ||
255 | static inline int NFS_STALE(const struct inode *inode) | |
256 | { | |
257 | return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); | |
258 | } | |
259 | ||
260 | static inline __u64 NFS_FILEID(const struct inode *inode) | |
261 | { | |
262 | return NFS_I(inode)->fileid; | |
263 | } | |
264 | ||
265 | static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) | |
266 | { | |
267 | NFS_I(inode)->fileid = fileid; | |
268 | } | |
1da177e4 | 269 | |
decf491f TM |
270 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
271 | { | |
38478b24 TM |
272 | struct nfs_inode *nfsi = NFS_I(inode); |
273 | ||
decf491f | 274 | spin_lock(&inode->i_lock); |
38478b24 | 275 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS; |
f3821110 | 276 | if (S_ISDIR(inode->i_mode)) |
38478b24 | 277 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
decf491f TM |
278 | spin_unlock(&inode->i_lock); |
279 | } | |
280 | ||
1da177e4 LT |
281 | static inline int nfs_server_capable(struct inode *inode, int cap) |
282 | { | |
283 | return NFS_SERVER(inode)->caps & cap; | |
284 | } | |
285 | ||
286 | static inline int NFS_USE_READDIRPLUS(struct inode *inode) | |
287 | { | |
3a10c30a | 288 | return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
1da177e4 LT |
289 | } |
290 | ||
d75340cc TM |
291 | static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) |
292 | { | |
293 | dentry->d_time = verf; | |
294 | } | |
295 | ||
1da177e4 LT |
296 | /** |
297 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
8edb0182 | 298 | * @dir - pointer to parent directory inode |
1da177e4 LT |
299 | * The "change attribute" is updated every time we finish an operation |
300 | * that will result in a metadata change on the server. | |
301 | */ | |
8edb0182 | 302 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
1da177e4 | 303 | { |
8edb0182 | 304 | return NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
305 | } |
306 | ||
307 | /** | |
4b841736 TM |
308 | * nfs_verify_change_attribute - Detects NFS remote directory changes |
309 | * @dir - pointer to parent directory inode | |
1da177e4 | 310 | * @chattr - previously saved change attribute |
4b841736 TM |
311 | * Return "false" if the verifiers doesn't match the change attribute. |
312 | * This would usually indicate that the directory contents have changed on | |
313 | * the server, and that any dentries need revalidating. | |
1da177e4 | 314 | */ |
4b841736 | 315 | static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr) |
1da177e4 | 316 | { |
4b841736 | 317 | return chattr == NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
318 | } |
319 | ||
320 | /* | |
321 | * linux/fs/nfs/inode.c | |
322 | */ | |
29884df0 | 323 | extern int nfs_sync_mapping(struct address_space *mapping); |
cd9ae2b6 | 324 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 325 | extern void nfs_zap_caches(struct inode *); |
c4812998 | 326 | extern void nfs_invalidate_atime(struct inode *); |
1da177e4 LT |
327 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
328 | struct nfs_fattr *); | |
329 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); | |
decf491f | 330 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
70ca8852 | 331 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
1da177e4 | 332 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
e6305c43 | 333 | extern int nfs_permission(struct inode *, int); |
1da177e4 LT |
334 | extern int nfs_open(struct inode *, struct file *); |
335 | extern int nfs_release(struct inode *, struct file *); | |
336 | extern int nfs_attribute_timeout(struct inode *inode); | |
337 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); | |
338 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
44b11874 | 339 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
717d44e8 | 340 | extern int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping); |
1da177e4 | 341 | extern int nfs_setattr(struct dentry *, struct iattr *); |
65e4308d | 342 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); |
1da177e4 LT |
343 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
344 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
d530838b | 345 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode); |
f43bf0be | 346 | extern u64 nfs_compat_user_ino64(u64 fileid); |
4704f0e2 | 347 | extern void nfs_fattr_init(struct nfs_fattr *fattr); |
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*/ |
4704f0e2 | 351 | extern unsigned long nfs_inc_attr_generation_counter(void); |
0e574af1 | 352 | |
1da177e4 LT |
353 | /* |
354 | * linux/fs/nfs/file.c | |
355 | */ | |
c5ef1c42 | 356 | extern const struct inode_operations nfs_file_inode_operations; |
b7fa0554 | 357 | #ifdef CONFIG_NFS_V3 |
c5ef1c42 | 358 | extern const struct inode_operations nfs3_file_inode_operations; |
b7fa0554 | 359 | #endif /* CONFIG_NFS_V3 */ |
4b6f5d20 | 360 | extern const struct file_operations nfs_file_operations; |
f5e54d6e | 361 | extern const struct address_space_operations nfs_file_aops; |
1da177e4 | 362 | |
c03025d5 TM |
363 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
364 | { | |
365 | return filp->private_data; | |
366 | } | |
367 | ||
1da177e4 LT |
368 | static inline struct rpc_cred *nfs_file_cred(struct file *file) |
369 | { | |
504e5189 NB |
370 | if (file != NULL) { |
371 | struct nfs_open_context *ctx = | |
372 | nfs_file_open_context(file); | |
373 | if (ctx) | |
374 | return ctx->cred; | |
375 | } | |
1da177e4 LT |
376 | return NULL; |
377 | } | |
378 | ||
b7fa0554 AG |
379 | /* |
380 | * linux/fs/nfs/xattr.c | |
381 | */ | |
382 | #ifdef CONFIG_NFS_V3_ACL | |
383 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); | |
384 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); | |
385 | extern int nfs3_setxattr(struct dentry *, const char *, | |
386 | const void *, size_t, int); | |
387 | extern int nfs3_removexattr (struct dentry *, const char *name); | |
388 | #else | |
389 | # define nfs3_listxattr NULL | |
390 | # define nfs3_getxattr NULL | |
391 | # define nfs3_setxattr NULL | |
392 | # define nfs3_removexattr NULL | |
393 | #endif | |
394 | ||
1da177e4 LT |
395 | /* |
396 | * linux/fs/nfs/direct.c | |
397 | */ | |
398 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, | |
399 | unsigned long); | |
027445c3 BP |
400 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, |
401 | const struct iovec *iov, unsigned long nr_segs, | |
402 | loff_t pos); | |
403 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, | |
404 | const struct iovec *iov, unsigned long nr_segs, | |
405 | loff_t pos); | |
1da177e4 LT |
406 | |
407 | /* | |
408 | * linux/fs/nfs/dir.c | |
409 | */ | |
c5ef1c42 | 410 | extern const struct inode_operations nfs_dir_inode_operations; |
b7fa0554 | 411 | #ifdef CONFIG_NFS_V3 |
c5ef1c42 | 412 | extern const struct inode_operations nfs3_dir_inode_operations; |
b7fa0554 | 413 | #endif /* CONFIG_NFS_V3 */ |
4b6f5d20 | 414 | extern const struct file_operations nfs_dir_operations; |
1da177e4 LT |
415 | extern struct dentry_operations nfs_dentry_operations; |
416 | ||
bfc69a45 | 417 | extern void nfs_force_lookup_revalidate(struct inode *dir); |
1da177e4 | 418 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); |
af22f94a TM |
419 | extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags); |
420 | extern void nfs_access_zap_cache(struct inode *inode); | |
1da177e4 LT |
421 | |
422 | /* | |
423 | * linux/fs/nfs/symlink.c | |
424 | */ | |
c5ef1c42 | 425 | extern const struct inode_operations nfs_symlink_inode_operations; |
1da177e4 | 426 | |
a72b4422 TM |
427 | /* |
428 | * linux/fs/nfs/sysctl.c | |
429 | */ | |
430 | #ifdef CONFIG_SYSCTL | |
431 | extern int nfs_register_sysctl(void); | |
432 | extern void nfs_unregister_sysctl(void); | |
433 | #else | |
7fd105e7 | 434 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
435 | #define nfs_unregister_sysctl() do { } while(0) |
436 | #endif | |
437 | ||
55a97593 TM |
438 | /* |
439 | * linux/fs/nfs/namespace.c | |
440 | */ | |
c5ef1c42 AV |
441 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
442 | extern const struct inode_operations nfs_referral_inode_operations; | |
51d8fa6a TM |
443 | extern int nfs_mountpoint_expiry_timeout; |
444 | extern void nfs_release_automount_timer(void); | |
55a97593 | 445 | |
1da177e4 LT |
446 | /* |
447 | * linux/fs/nfs/unlink.c | |
448 | */ | |
e4eff1a6 TM |
449 | extern int nfs_async_unlink(struct inode *dir, struct dentry *dentry); |
450 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); | |
565277f6 TM |
451 | extern void nfs_block_sillyrename(struct dentry *dentry); |
452 | extern void nfs_unblock_sillyrename(struct dentry *dentry); | |
1da177e4 LT |
453 | |
454 | /* | |
455 | * linux/fs/nfs/write.c | |
456 | */ | |
89a09141 | 457 | extern int nfs_congestion_kb; |
1da177e4 LT |
458 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
459 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
460 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
461 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
462d5b32 CL |
462 | extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *); |
463 | extern void nfs_writedata_release(void *); | |
1da177e4 LT |
464 | |
465 | /* | |
466 | * Try to write back everything synchronously (but check the | |
467 | * return value!) | |
468 | */ | |
1c75950b | 469 | extern long nfs_sync_mapping_wait(struct address_space *, struct writeback_control *, int); |
1c75950b | 470 | extern int nfs_wb_all(struct inode *inode); |
ed90ef51 | 471 | extern int nfs_wb_nocommit(struct inode *inode); |
1c75950b | 472 | extern int nfs_wb_page(struct inode *inode, struct page* page); |
1b3b4a1a | 473 | extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); |
1da177e4 | 474 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
3da28eb1 | 475 | extern int nfs_commit_inode(struct inode *, int); |
c9d8f89d | 476 | extern struct nfs_write_data *nfs_commitdata_alloc(void); |
8aca67f0 | 477 | extern void nfs_commit_free(struct nfs_write_data *wdata); |
c9d8f89d | 478 | extern void nfs_commitdata_release(void *wdata); |
1da177e4 LT |
479 | #else |
480 | static inline int | |
3da28eb1 | 481 | nfs_commit_inode(struct inode *inode, int how) |
1da177e4 LT |
482 | { |
483 | return 0; | |
484 | } | |
485 | #endif | |
486 | ||
487 | static inline int | |
488 | nfs_have_writebacks(struct inode *inode) | |
489 | { | |
490 | return NFS_I(inode)->npages != 0; | |
491 | } | |
492 | ||
1da177e4 | 493 | /* |
e4e20512 | 494 | * Allocate nfs_write_data structures |
1da177e4 | 495 | */ |
8d5658c9 | 496 | extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages); |
1da177e4 | 497 | |
1da177e4 LT |
498 | /* |
499 | * linux/fs/nfs/read.c | |
500 | */ | |
501 | extern int nfs_readpage(struct file *, struct page *); | |
502 | extern int nfs_readpages(struct file *, struct address_space *, | |
503 | struct list_head *, unsigned); | |
ec06c096 TM |
504 | extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *); |
505 | extern void nfs_readdata_release(void *data); | |
963d8fe5 | 506 | |
1da177e4 | 507 | /* |
e4e20512 | 508 | * Allocate nfs_read_data structures |
1da177e4 | 509 | */ |
8d5658c9 | 510 | extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages); |
1da177e4 | 511 | |
b7fa0554 AG |
512 | /* |
513 | * linux/fs/nfs3proc.c | |
514 | */ | |
515 | #ifdef CONFIG_NFS_V3_ACL | |
516 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); | |
517 | extern int nfs3_proc_setacl(struct inode *inode, int type, | |
518 | struct posix_acl *acl); | |
055ffbea AG |
519 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
520 | mode_t mode); | |
5c6a9f7d | 521 | extern void nfs3_forget_cached_acls(struct inode *inode); |
055ffbea AG |
522 | #else |
523 | static inline int nfs3_proc_set_default_acl(struct inode *dir, | |
524 | struct inode *inode, | |
525 | mode_t mode) | |
526 | { | |
527 | return 0; | |
528 | } | |
5c6a9f7d AG |
529 | |
530 | static inline void nfs3_forget_cached_acls(struct inode *inode) | |
531 | { | |
532 | } | |
b7fa0554 AG |
533 | #endif /* CONFIG_NFS_V3_ACL */ |
534 | ||
1da177e4 LT |
535 | /* |
536 | * inline functions | |
537 | */ | |
538 | ||
433c9237 | 539 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
1da177e4 | 540 | { |
433c9237 CL |
541 | if (size > (__u64) OFFSET_MAX - 1) |
542 | return OFFSET_MAX - 1; | |
1da177e4 LT |
543 | return (loff_t) size; |
544 | } | |
545 | ||
546 | static inline ino_t | |
547 | nfs_fileid_to_ino_t(u64 fileid) | |
548 | { | |
549 | ino_t ino = (ino_t) fileid; | |
550 | if (sizeof(ino_t) < sizeof(u64)) | |
551 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
552 | return ino; | |
553 | } | |
554 | ||
555 | /* NFS root */ | |
556 | ||
557 | extern void * nfs_root_data(void); | |
558 | ||
559 | #define nfs_wait_event(clnt, wq, condition) \ | |
560 | ({ \ | |
150030b7 | 561 | int __retval = wait_event_killable(wq, condition); \ |
1da177e4 LT |
562 | __retval; \ |
563 | }) | |
564 | ||
565 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) | |
566 | ||
1da177e4 LT |
567 | #endif /* __KERNEL__ */ |
568 | ||
569 | /* | |
570 | * NFS debug flags | |
571 | */ | |
572 | #define NFSDBG_VFS 0x0001 | |
573 | #define NFSDBG_DIRCACHE 0x0002 | |
574 | #define NFSDBG_LOOKUPCACHE 0x0004 | |
575 | #define NFSDBG_PAGECACHE 0x0008 | |
576 | #define NFSDBG_PROC 0x0010 | |
577 | #define NFSDBG_XDR 0x0020 | |
578 | #define NFSDBG_FILE 0x0040 | |
579 | #define NFSDBG_ROOT 0x0080 | |
580 | #define NFSDBG_CALLBACK 0x0100 | |
24c8dbbb | 581 | #define NFSDBG_CLIENT 0x0200 |
f1828993 | 582 | #define NFSDBG_MOUNT 0x0400 |
1da177e4 LT |
583 | #define NFSDBG_ALL 0xFFFF |
584 | ||
585 | #ifdef __KERNEL__ | |
4dc2eaec BH |
586 | |
587 | /* | |
588 | * Enable debugging support for nfs client. | |
589 | * Requires RPC_DEBUG. | |
590 | */ | |
591 | #ifdef RPC_DEBUG | |
592 | # define NFS_DEBUG | |
593 | #endif | |
594 | ||
1da177e4 LT |
595 | # undef ifdebug |
596 | # ifdef NFS_DEBUG | |
597 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
598 | # else | |
599 | # define ifdebug(fac) if (0) | |
600 | # endif | |
601 | #endif /* __KERNEL */ | |
602 | ||
603 | #endif |