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 */ | |
36 | ||
37 | #ifdef __KERNEL__ | |
38 | ||
7f1cbe51 DW |
39 | #include <linux/in.h> |
40 | #include <linux/mm.h> | |
41 | #include <linux/pagemap.h> | |
1c3c07e9 | 42 | #include <linux/rbtree.h> |
7f1cbe51 DW |
43 | #include <linux/rwsem.h> |
44 | #include <linux/wait.h> | |
45 | ||
46 | #include <linux/sunrpc/debug.h> | |
47 | #include <linux/sunrpc/auth.h> | |
48 | #include <linux/sunrpc/clnt.h> | |
49 | ||
50 | #include <linux/nfs.h> | |
51 | #include <linux/nfs2.h> | |
52 | #include <linux/nfs3.h> | |
53 | #include <linux/nfs4.h> | |
54 | #include <linux/nfs_xdr.h> | |
7f1cbe51 DW |
55 | #include <linux/nfs_fs_sb.h> |
56 | ||
7f1cbe51 DW |
57 | #include <linux/mempool.h> |
58 | ||
59 | /* | |
60 | * These are the default flags for swap requests | |
61 | */ | |
62 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) | |
63 | ||
1da177e4 LT |
64 | /* |
65 | * NFSv3/v4 Access mode cache entry | |
66 | */ | |
67 | struct nfs_access_entry { | |
1c3c07e9 | 68 | struct rb_node rb_node; |
cfcea3e8 | 69 | struct list_head lru; |
1da177e4 LT |
70 | unsigned long jiffies; |
71 | struct rpc_cred * cred; | |
72 | int mask; | |
73 | }; | |
74 | ||
f11ac8db TM |
75 | struct nfs_lock_context { |
76 | atomic_t count; | |
77 | struct list_head list; | |
78 | struct nfs_open_context *open_context; | |
79 | fl_owner_t lockowner; | |
80 | pid_t pid; | |
81 | }; | |
82 | ||
1da177e4 LT |
83 | struct nfs4_state; |
84 | struct nfs_open_context { | |
f11ac8db | 85 | struct nfs_lock_context lock_context; |
88be9f99 | 86 | struct path path; |
1da177e4 LT |
87 | struct rpc_cred *cred; |
88 | struct nfs4_state *state; | |
dc0b027d | 89 | fmode_t mode; |
7b159fc1 TM |
90 | |
91 | unsigned long flags; | |
92 | #define NFS_CONTEXT_ERROR_WRITE (0) | |
1da177e4 LT |
93 | int error; |
94 | ||
95 | struct list_head list; | |
00a92642 | 96 | |
00a92642 | 97 | __u64 dir_cookie; |
1da177e4 LT |
98 | }; |
99 | ||
100 | /* | |
101 | * NFSv4 delegation | |
102 | */ | |
103 | struct nfs_delegation; | |
104 | ||
5c6a9f7d AG |
105 | struct posix_acl; |
106 | ||
1da177e4 LT |
107 | /* |
108 | * nfs fs inode data in memory | |
109 | */ | |
110 | struct nfs_inode { | |
111 | /* | |
112 | * The 64bit 'inode number' | |
113 | */ | |
114 | __u64 fileid; | |
115 | ||
116 | /* | |
117 | * NFS file handle | |
118 | */ | |
119 | struct nfs_fh fh; | |
120 | ||
121 | /* | |
122 | * Various flags | |
123 | */ | |
412d582e CL |
124 | unsigned long flags; /* atomic bit ops */ |
125 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
126 | |
127 | /* | |
24bd68f4 | 128 | * read_cache_jiffies is when we started read-caching this inode. |
1da177e4 LT |
129 | * attrtimeo is for how long the cached information is assumed |
130 | * to be valid. A successful attribute revalidation doubles | |
131 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
132 | * acregmin/acdirmin. | |
133 | * | |
134 | * We need to revalidate the cached attrs for this inode if | |
135 | * | |
64672d55 PS |
136 | * jiffies - read_cache_jiffies >= attrtimeo |
137 | * | |
138 | * Please note the comparison is greater than or equal | |
139 | * so that zero timeout values can be specified. | |
1da177e4 | 140 | */ |
1da177e4 LT |
141 | unsigned long read_cache_jiffies; |
142 | unsigned long attrtimeo; | |
143 | unsigned long attrtimeo_timestamp; | |
144 | __u64 change_attr; /* v4 only */ | |
145 | ||
4704f0e2 | 146 | unsigned long attr_gencount; |
1da177e4 LT |
147 | /* "Generation counter" for the attribute cache. This is |
148 | * bumped whenever we update the metadata on the | |
149 | * server. | |
150 | */ | |
151 | unsigned long cache_change_attribute; | |
1da177e4 | 152 | |
1c3c07e9 | 153 | struct rb_root access_cache; |
cfcea3e8 TM |
154 | struct list_head access_cache_entry_lru; |
155 | struct list_head access_cache_inode_lru; | |
5c6a9f7d AG |
156 | #ifdef CONFIG_NFS_V3_ACL |
157 | struct posix_acl *acl_access; | |
158 | struct posix_acl *acl_default; | |
159 | #endif | |
1da177e4 LT |
160 | |
161 | /* | |
162 | * This is the cookie verifier used for NFSv3 readdir | |
163 | * operations | |
164 | */ | |
bc4785cd | 165 | __be32 cookieverf[2]; |
1da177e4 LT |
166 | |
167 | /* | |
168 | * This is the list of dirty unwritten pages. | |
169 | */ | |
1da177e4 LT |
170 | struct radix_tree_root nfs_page_tree; |
171 | ||
fb8a1f11 | 172 | unsigned long npages; |
ff778d02 | 173 | unsigned long ncommit; |
1da177e4 LT |
174 | |
175 | /* Open contexts for shared mmap writes */ | |
176 | struct list_head open_files; | |
177 | ||
565277f6 TM |
178 | /* Number of in-flight sillydelete RPC calls */ |
179 | atomic_t silly_count; | |
180 | /* List of deferred sillydelete requests */ | |
181 | struct hlist_head silly_list; | |
182 | wait_queue_head_t waitqueue; | |
183 | ||
1da177e4 | 184 | #ifdef CONFIG_NFS_V4 |
e50a1c2e | 185 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
186 | /* NFSv4 state */ |
187 | struct list_head open_states; | |
188 | struct nfs_delegation *delegation; | |
bd7bf9d5 | 189 | fmode_t delegation_state; |
1da177e4 LT |
190 | struct rw_semaphore rwsem; |
191 | #endif /* CONFIG_NFS_V4*/ | |
ef79c097 DH |
192 | #ifdef CONFIG_NFS_FSCACHE |
193 | struct fscache_cookie *fscache; | |
194 | #endif | |
1da177e4 LT |
195 | struct inode vfs_inode; |
196 | }; | |
197 | ||
198 | /* | |
55296809 | 199 | * Cache validity bit flags |
1da177e4 | 200 | */ |
55296809 CL |
201 | #define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */ |
202 | #define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ | |
203 | #define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ | |
204 | #define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ | |
205 | #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ | |
206 | #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ | |
412c77ce | 207 | #define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */ |
55296809 CL |
208 | |
209 | /* | |
412d582e | 210 | * Bit offsets in flags field |
55296809 | 211 | */ |
691beb13 TM |
212 | #define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */ |
213 | #define NFS_INO_STALE (1) /* possible stale inode */ | |
214 | #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ | |
215 | #define NFS_INO_MOUNTPOINT (3) /* inode is remote mountpoint */ | |
72cb77f4 | 216 | #define NFS_INO_FLUSHING (4) /* inode is flushing out data */ |
ef79c097 DH |
217 | #define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ |
218 | #define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */ | |
71d0a611 | 219 | #define NFS_INO_COMMIT (7) /* inode is committing unstable writes */ |
1da177e4 | 220 | |
99fadcd7 | 221 | static inline struct nfs_inode *NFS_I(const struct inode *inode) |
1da177e4 LT |
222 | { |
223 | return container_of(inode, struct nfs_inode, vfs_inode); | |
224 | } | |
99fadcd7 BH |
225 | |
226 | static inline struct nfs_server *NFS_SB(const struct super_block *s) | |
227 | { | |
228 | return (struct nfs_server *)(s->s_fs_info); | |
229 | } | |
230 | ||
231 | static inline struct nfs_fh *NFS_FH(const struct inode *inode) | |
232 | { | |
233 | return &NFS_I(inode)->fh; | |
234 | } | |
235 | ||
236 | static inline struct nfs_server *NFS_SERVER(const struct inode *inode) | |
237 | { | |
238 | return NFS_SB(inode->i_sb); | |
239 | } | |
240 | ||
241 | static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) | |
242 | { | |
243 | return NFS_SERVER(inode)->client; | |
244 | } | |
245 | ||
246 | static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) | |
247 | { | |
248 | return NFS_SERVER(inode)->nfs_client->rpc_ops; | |
249 | } | |
250 | ||
251 | static inline __be32 *NFS_COOKIEVERF(const struct inode *inode) | |
252 | { | |
253 | return NFS_I(inode)->cookieverf; | |
254 | } | |
255 | ||
256 | static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) | |
257 | { | |
258 | struct nfs_server *nfss = NFS_SERVER(inode); | |
259 | return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; | |
260 | } | |
261 | ||
262 | static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) | |
263 | { | |
264 | struct nfs_server *nfss = NFS_SERVER(inode); | |
265 | return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; | |
266 | } | |
267 | ||
268 | static inline int NFS_STALE(const struct inode *inode) | |
269 | { | |
270 | return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); | |
271 | } | |
272 | ||
ef79c097 DH |
273 | static inline int NFS_FSCACHE(const struct inode *inode) |
274 | { | |
275 | return test_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags); | |
276 | } | |
277 | ||
99fadcd7 BH |
278 | static inline __u64 NFS_FILEID(const struct inode *inode) |
279 | { | |
280 | return NFS_I(inode)->fileid; | |
281 | } | |
282 | ||
283 | static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) | |
284 | { | |
285 | NFS_I(inode)->fileid = fileid; | |
286 | } | |
1da177e4 | 287 | |
decf491f TM |
288 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
289 | { | |
38478b24 TM |
290 | struct nfs_inode *nfsi = NFS_I(inode); |
291 | ||
decf491f | 292 | spin_lock(&inode->i_lock); |
38478b24 | 293 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS; |
f3821110 | 294 | if (S_ISDIR(inode->i_mode)) |
38478b24 | 295 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
decf491f TM |
296 | spin_unlock(&inode->i_lock); |
297 | } | |
298 | ||
1da177e4 LT |
299 | static inline int nfs_server_capable(struct inode *inode, int cap) |
300 | { | |
301 | return NFS_SERVER(inode)->caps & cap; | |
302 | } | |
303 | ||
304 | static inline int NFS_USE_READDIRPLUS(struct inode *inode) | |
305 | { | |
3a10c30a | 306 | return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
1da177e4 LT |
307 | } |
308 | ||
d75340cc TM |
309 | static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) |
310 | { | |
311 | dentry->d_time = verf; | |
312 | } | |
313 | ||
1da177e4 LT |
314 | /** |
315 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
8edb0182 | 316 | * @dir - pointer to parent directory inode |
1da177e4 LT |
317 | * The "change attribute" is updated every time we finish an operation |
318 | * that will result in a metadata change on the server. | |
319 | */ | |
8edb0182 | 320 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
1da177e4 | 321 | { |
8edb0182 | 322 | return NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
323 | } |
324 | ||
325 | /** | |
4b841736 TM |
326 | * nfs_verify_change_attribute - Detects NFS remote directory changes |
327 | * @dir - pointer to parent directory inode | |
1da177e4 | 328 | * @chattr - previously saved change attribute |
4b841736 TM |
329 | * Return "false" if the verifiers doesn't match the change attribute. |
330 | * This would usually indicate that the directory contents have changed on | |
331 | * the server, and that any dentries need revalidating. | |
1da177e4 | 332 | */ |
4b841736 | 333 | static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr) |
1da177e4 | 334 | { |
4b841736 | 335 | return chattr == NFS_I(dir)->cache_change_attribute; |
1da177e4 LT |
336 | } |
337 | ||
338 | /* | |
339 | * linux/fs/nfs/inode.c | |
340 | */ | |
29884df0 | 341 | extern int nfs_sync_mapping(struct address_space *mapping); |
cd9ae2b6 | 342 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 343 | extern void nfs_zap_caches(struct inode *); |
c4812998 | 344 | extern void nfs_invalidate_atime(struct inode *); |
1da177e4 LT |
345 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
346 | struct nfs_fattr *); | |
347 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); | |
decf491f | 348 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
70ca8852 | 349 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
1da177e4 | 350 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
e6305c43 | 351 | extern int nfs_permission(struct inode *, int); |
1da177e4 LT |
352 | extern int nfs_open(struct inode *, struct file *); |
353 | extern int nfs_release(struct inode *, struct file *); | |
354 | extern int nfs_attribute_timeout(struct inode *inode); | |
355 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); | |
356 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
44b11874 | 357 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 358 | extern int nfs_setattr(struct dentry *, struct iattr *); |
65e4308d | 359 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); |
1da177e4 LT |
360 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
361 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
dc0b027d | 362 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode); |
cd9a1c0e TM |
363 | extern struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode); |
364 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); | |
f11ac8db TM |
365 | extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); |
366 | extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); | |
f43bf0be | 367 | extern u64 nfs_compat_user_ino64(u64 fileid); |
4704f0e2 | 368 | extern void nfs_fattr_init(struct nfs_fattr *fattr); |
56463e50 | 369 | extern unsigned long nfs_inc_attr_generation_counter(void); |
1da177e4 | 370 | |
2d36bfde TM |
371 | extern struct nfs_fattr *nfs_alloc_fattr(void); |
372 | ||
373 | static inline void nfs_free_fattr(const struct nfs_fattr *fattr) | |
374 | { | |
375 | kfree(fattr); | |
376 | } | |
377 | ||
378 | extern struct nfs_fh *nfs_alloc_fhandle(void); | |
379 | ||
380 | static inline void nfs_free_fhandle(const struct nfs_fh *fh) | |
381 | { | |
382 | kfree(fh); | |
383 | } | |
384 | ||
56463e50 CL |
385 | /* |
386 | * linux/fs/nfs/nfsroot.c | |
387 | */ | |
388 | extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ | |
1da177e4 | 389 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ |
5a874db4 | 390 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
0e574af1 | 391 | |
1da177e4 LT |
392 | /* |
393 | * linux/fs/nfs/file.c | |
394 | */ | |
c5ef1c42 | 395 | extern const struct inode_operations nfs_file_inode_operations; |
b7fa0554 | 396 | #ifdef CONFIG_NFS_V3 |
c5ef1c42 | 397 | extern const struct inode_operations nfs3_file_inode_operations; |
b7fa0554 | 398 | #endif /* CONFIG_NFS_V3 */ |
4b6f5d20 | 399 | extern const struct file_operations nfs_file_operations; |
f5e54d6e | 400 | extern const struct address_space_operations nfs_file_aops; |
1da177e4 | 401 | |
c03025d5 TM |
402 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
403 | { | |
404 | return filp->private_data; | |
405 | } | |
406 | ||
1da177e4 LT |
407 | static inline struct rpc_cred *nfs_file_cred(struct file *file) |
408 | { | |
504e5189 NB |
409 | if (file != NULL) { |
410 | struct nfs_open_context *ctx = | |
411 | nfs_file_open_context(file); | |
412 | if (ctx) | |
413 | return ctx->cred; | |
414 | } | |
1da177e4 LT |
415 | return NULL; |
416 | } | |
417 | ||
b7fa0554 AG |
418 | /* |
419 | * linux/fs/nfs/xattr.c | |
420 | */ | |
421 | #ifdef CONFIG_NFS_V3_ACL | |
422 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); | |
423 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); | |
424 | extern int nfs3_setxattr(struct dentry *, const char *, | |
425 | const void *, size_t, int); | |
426 | extern int nfs3_removexattr (struct dentry *, const char *name); | |
427 | #else | |
428 | # define nfs3_listxattr NULL | |
429 | # define nfs3_getxattr NULL | |
430 | # define nfs3_setxattr NULL | |
431 | # define nfs3_removexattr NULL | |
432 | #endif | |
433 | ||
1da177e4 LT |
434 | /* |
435 | * linux/fs/nfs/direct.c | |
436 | */ | |
437 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, | |
438 | unsigned long); | |
027445c3 BP |
439 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, |
440 | const struct iovec *iov, unsigned long nr_segs, | |
441 | loff_t pos); | |
442 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, | |
443 | const struct iovec *iov, unsigned long nr_segs, | |
444 | loff_t pos); | |
1da177e4 LT |
445 | |
446 | /* | |
447 | * linux/fs/nfs/dir.c | |
448 | */ | |
c5ef1c42 | 449 | extern const struct inode_operations nfs_dir_inode_operations; |
b7fa0554 | 450 | #ifdef CONFIG_NFS_V3 |
c5ef1c42 | 451 | extern const struct inode_operations nfs3_dir_inode_operations; |
b7fa0554 | 452 | #endif /* CONFIG_NFS_V3 */ |
4b6f5d20 | 453 | extern const struct file_operations nfs_dir_operations; |
f786aa90 | 454 | extern const struct dentry_operations nfs_dentry_operations; |
1da177e4 | 455 | |
bfc69a45 | 456 | extern void nfs_force_lookup_revalidate(struct inode *dir); |
1da177e4 | 457 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); |
af22f94a TM |
458 | extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags); |
459 | extern void nfs_access_zap_cache(struct inode *inode); | |
1da177e4 LT |
460 | |
461 | /* | |
462 | * linux/fs/nfs/symlink.c | |
463 | */ | |
c5ef1c42 | 464 | extern const struct inode_operations nfs_symlink_inode_operations; |
1da177e4 | 465 | |
a72b4422 TM |
466 | /* |
467 | * linux/fs/nfs/sysctl.c | |
468 | */ | |
469 | #ifdef CONFIG_SYSCTL | |
470 | extern int nfs_register_sysctl(void); | |
471 | extern void nfs_unregister_sysctl(void); | |
472 | #else | |
7fd105e7 | 473 | #define nfs_register_sysctl() 0 |
a72b4422 TM |
474 | #define nfs_unregister_sysctl() do { } while(0) |
475 | #endif | |
476 | ||
55a97593 TM |
477 | /* |
478 | * linux/fs/nfs/namespace.c | |
479 | */ | |
c5ef1c42 AV |
480 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
481 | extern const struct inode_operations nfs_referral_inode_operations; | |
51d8fa6a TM |
482 | extern int nfs_mountpoint_expiry_timeout; |
483 | extern void nfs_release_automount_timer(void); | |
55a97593 | 484 | |
1da177e4 LT |
485 | /* |
486 | * linux/fs/nfs/unlink.c | |
487 | */ | |
e4eff1a6 | 488 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); |
565277f6 TM |
489 | extern void nfs_block_sillyrename(struct dentry *dentry); |
490 | extern void nfs_unblock_sillyrename(struct dentry *dentry); | |
779c5179 | 491 | extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); |
1da177e4 LT |
492 | |
493 | /* | |
494 | * linux/fs/nfs/write.c | |
495 | */ | |
89a09141 | 496 | extern int nfs_congestion_kb; |
1da177e4 LT |
497 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
498 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
499 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
500 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
462d5b32 | 501 | extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *); |
1da177e4 LT |
502 | |
503 | /* | |
504 | * Try to write back everything synchronously (but check the | |
505 | * return value!) | |
506 | */ | |
1c75950b TM |
507 | extern int nfs_wb_all(struct inode *inode); |
508 | extern int nfs_wb_page(struct inode *inode, struct page* page); | |
1b3b4a1a | 509 | extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); |
1da177e4 | 510 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
b608b283 | 511 | extern int nfs_commit_inode(struct inode *, int); |
c9d8f89d | 512 | extern struct nfs_write_data *nfs_commitdata_alloc(void); |
8aca67f0 | 513 | extern void nfs_commit_free(struct nfs_write_data *wdata); |
77a63f3d TM |
514 | #else |
515 | static inline int | |
516 | nfs_commit_inode(struct inode *inode, int how) | |
517 | { | |
518 | return 0; | |
519 | } | |
1da177e4 LT |
520 | #endif |
521 | ||
522 | static inline int | |
523 | nfs_have_writebacks(struct inode *inode) | |
524 | { | |
525 | return NFS_I(inode)->npages != 0; | |
526 | } | |
527 | ||
1da177e4 | 528 | /* |
e4e20512 | 529 | * Allocate nfs_write_data structures |
1da177e4 | 530 | */ |
8d5658c9 | 531 | extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages); |
1ae88b2e | 532 | extern void nfs_writedata_free(struct nfs_write_data *); |
1da177e4 | 533 | |
1da177e4 LT |
534 | /* |
535 | * linux/fs/nfs/read.c | |
536 | */ | |
537 | extern int nfs_readpage(struct file *, struct page *); | |
538 | extern int nfs_readpages(struct file *, struct address_space *, | |
539 | struct list_head *, unsigned); | |
ec06c096 | 540 | extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *); |
f42b293d DH |
541 | extern int nfs_readpage_async(struct nfs_open_context *, struct inode *, |
542 | struct page *); | |
963d8fe5 | 543 | |
1da177e4 | 544 | /* |
e4e20512 | 545 | * Allocate nfs_read_data structures |
1da177e4 | 546 | */ |
8d5658c9 | 547 | extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages); |
1ae88b2e | 548 | extern void nfs_readdata_free(struct nfs_read_data *); |
1da177e4 | 549 | |
b7fa0554 AG |
550 | /* |
551 | * linux/fs/nfs3proc.c | |
552 | */ | |
553 | #ifdef CONFIG_NFS_V3_ACL | |
554 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); | |
555 | extern int nfs3_proc_setacl(struct inode *inode, int type, | |
556 | struct posix_acl *acl); | |
055ffbea AG |
557 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
558 | mode_t mode); | |
5c6a9f7d | 559 | extern void nfs3_forget_cached_acls(struct inode *inode); |
055ffbea AG |
560 | #else |
561 | static inline int nfs3_proc_set_default_acl(struct inode *dir, | |
562 | struct inode *inode, | |
563 | mode_t mode) | |
564 | { | |
565 | return 0; | |
566 | } | |
5c6a9f7d AG |
567 | |
568 | static inline void nfs3_forget_cached_acls(struct inode *inode) | |
569 | { | |
570 | } | |
b7fa0554 AG |
571 | #endif /* CONFIG_NFS_V3_ACL */ |
572 | ||
1da177e4 LT |
573 | /* |
574 | * inline functions | |
575 | */ | |
576 | ||
433c9237 | 577 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
1da177e4 | 578 | { |
433c9237 CL |
579 | if (size > (__u64) OFFSET_MAX - 1) |
580 | return OFFSET_MAX - 1; | |
1da177e4 LT |
581 | return (loff_t) size; |
582 | } | |
583 | ||
584 | static inline ino_t | |
585 | nfs_fileid_to_ino_t(u64 fileid) | |
586 | { | |
587 | ino_t ino = (ino_t) fileid; | |
588 | if (sizeof(ino_t) < sizeof(u64)) | |
589 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
590 | return ino; | |
591 | } | |
592 | ||
1da177e4 LT |
593 | #define nfs_wait_event(clnt, wq, condition) \ |
594 | ({ \ | |
150030b7 | 595 | int __retval = wait_event_killable(wq, condition); \ |
1da177e4 LT |
596 | __retval; \ |
597 | }) | |
598 | ||
599 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) | |
600 | ||
1da177e4 LT |
601 | #endif /* __KERNEL__ */ |
602 | ||
603 | /* | |
604 | * NFS debug flags | |
605 | */ | |
606 | #define NFSDBG_VFS 0x0001 | |
607 | #define NFSDBG_DIRCACHE 0x0002 | |
608 | #define NFSDBG_LOOKUPCACHE 0x0004 | |
609 | #define NFSDBG_PAGECACHE 0x0008 | |
610 | #define NFSDBG_PROC 0x0010 | |
611 | #define NFSDBG_XDR 0x0020 | |
612 | #define NFSDBG_FILE 0x0040 | |
613 | #define NFSDBG_ROOT 0x0080 | |
614 | #define NFSDBG_CALLBACK 0x0100 | |
24c8dbbb | 615 | #define NFSDBG_CLIENT 0x0200 |
f1828993 | 616 | #define NFSDBG_MOUNT 0x0400 |
c6a6f19e | 617 | #define NFSDBG_FSCACHE 0x0800 |
85e174ba | 618 | #define NFSDBG_PNFS 0x1000 |
1da177e4 LT |
619 | #define NFSDBG_ALL 0xFFFF |
620 | ||
621 | #ifdef __KERNEL__ | |
4dc2eaec BH |
622 | |
623 | /* | |
624 | * Enable debugging support for nfs client. | |
625 | * Requires RPC_DEBUG. | |
626 | */ | |
627 | #ifdef RPC_DEBUG | |
628 | # define NFS_DEBUG | |
629 | #endif | |
630 | ||
1da177e4 LT |
631 | # undef ifdebug |
632 | # ifdef NFS_DEBUG | |
633 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
634 | # else | |
635 | # define ifdebug(fac) if (0) | |
636 | # endif | |
637 | #endif /* __KERNEL */ | |
638 | ||
639 | #endif |