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 | ||
12 | #include <linux/config.h> | |
13 | #include <linux/in.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/pagemap.h> | |
16 | #include <linux/rwsem.h> | |
17 | #include <linux/wait.h> | |
1da177e4 LT |
18 | |
19 | #include <linux/nfs_fs_sb.h> | |
20 | ||
21 | #include <linux/sunrpc/debug.h> | |
22 | #include <linux/sunrpc/auth.h> | |
23 | #include <linux/sunrpc/clnt.h> | |
24 | ||
25 | #include <linux/nfs.h> | |
26 | #include <linux/nfs2.h> | |
27 | #include <linux/nfs3.h> | |
28 | #include <linux/nfs4.h> | |
29 | #include <linux/nfs_xdr.h> | |
30 | #include <linux/rwsem.h> | |
1da177e4 LT |
31 | #include <linux/mempool.h> |
32 | ||
33 | /* | |
34 | * Enable debugging support for nfs client. | |
35 | * Requires RPC_DEBUG. | |
36 | */ | |
37 | #ifdef RPC_DEBUG | |
38 | # define NFS_DEBUG | |
39 | #endif | |
40 | ||
03bf4b70 CL |
41 | /* Default timeout values */ |
42 | #define NFS_MAX_UDP_TIMEOUT (60*HZ) | |
43 | #define NFS_MAX_TCP_TIMEOUT (600*HZ) | |
44 | ||
1da177e4 LT |
45 | /* |
46 | * superblock magic number for NFS | |
47 | */ | |
48 | #define NFS_SUPER_MAGIC 0x6969 | |
49 | ||
50 | /* | |
51 | * These are the default flags for swap requests | |
52 | */ | |
53 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) | |
54 | ||
1da177e4 LT |
55 | /* |
56 | * When flushing a cluster of dirty pages, there can be different | |
57 | * strategies: | |
58 | */ | |
59 | #define FLUSH_AGING 0 /* only flush old buffers */ | |
60 | #define FLUSH_SYNC 1 /* file being synced, or contention */ | |
61 | #define FLUSH_WAIT 2 /* wait for completion */ | |
62 | #define FLUSH_STABLE 4 /* commit to stable storage */ | |
63 | #define FLUSH_LOWPRI 8 /* low priority background flush */ | |
64 | #define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */ | |
70b9ecbd | 65 | #define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */ |
1da177e4 LT |
66 | |
67 | #ifdef __KERNEL__ | |
68 | ||
69 | /* | |
70 | * NFSv3/v4 Access mode cache entry | |
71 | */ | |
72 | struct nfs_access_entry { | |
73 | unsigned long jiffies; | |
74 | struct rpc_cred * cred; | |
75 | int mask; | |
76 | }; | |
77 | ||
78 | struct nfs4_state; | |
79 | struct nfs_open_context { | |
80 | atomic_t count; | |
81 | struct dentry *dentry; | |
82 | struct rpc_cred *cred; | |
83 | struct nfs4_state *state; | |
84 | fl_owner_t lockowner; | |
85 | int mode; | |
86 | int error; | |
87 | ||
88 | struct list_head list; | |
00a92642 | 89 | |
00a92642 | 90 | __u64 dir_cookie; |
1da177e4 LT |
91 | }; |
92 | ||
93 | /* | |
94 | * NFSv4 delegation | |
95 | */ | |
96 | struct nfs_delegation; | |
97 | ||
5c6a9f7d AG |
98 | struct posix_acl; |
99 | ||
1da177e4 LT |
100 | /* |
101 | * nfs fs inode data in memory | |
102 | */ | |
103 | struct nfs_inode { | |
104 | /* | |
105 | * The 64bit 'inode number' | |
106 | */ | |
107 | __u64 fileid; | |
108 | ||
109 | /* | |
110 | * NFS file handle | |
111 | */ | |
112 | struct nfs_fh fh; | |
113 | ||
114 | /* | |
115 | * Various flags | |
116 | */ | |
412d582e CL |
117 | unsigned long flags; /* atomic bit ops */ |
118 | unsigned long cache_validity; /* bit mask */ | |
1da177e4 LT |
119 | |
120 | /* | |
121 | * read_cache_jiffies is when we started read-caching this inode, | |
122 | * and read_cache_mtime is the mtime of the inode at that time. | |
123 | * attrtimeo is for how long the cached information is assumed | |
124 | * to be valid. A successful attribute revalidation doubles | |
125 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to | |
126 | * acregmin/acdirmin. | |
127 | * | |
128 | * We need to revalidate the cached attrs for this inode if | |
129 | * | |
130 | * jiffies - read_cache_jiffies > attrtimeo | |
131 | * | |
132 | * and invalidate any cached data/flush out any dirty pages if | |
133 | * we find that | |
134 | * | |
135 | * mtime != read_cache_mtime | |
136 | */ | |
1da177e4 LT |
137 | unsigned long read_cache_jiffies; |
138 | unsigned long attrtimeo; | |
139 | unsigned long attrtimeo_timestamp; | |
140 | __u64 change_attr; /* v4 only */ | |
141 | ||
33801147 | 142 | unsigned long last_updated; |
1da177e4 LT |
143 | /* "Generation counter" for the attribute cache. This is |
144 | * bumped whenever we update the metadata on the | |
145 | * server. | |
146 | */ | |
147 | unsigned long cache_change_attribute; | |
148 | /* | |
149 | * Counter indicating the number of outstanding requests that | |
150 | * will cause a file data update. | |
151 | */ | |
152 | atomic_t data_updates; | |
153 | ||
154 | struct nfs_access_entry cache_access; | |
5c6a9f7d AG |
155 | #ifdef CONFIG_NFS_V3_ACL |
156 | struct posix_acl *acl_access; | |
157 | struct posix_acl *acl_default; | |
158 | #endif | |
1da177e4 LT |
159 | |
160 | /* | |
161 | * This is the cookie verifier used for NFSv3 readdir | |
162 | * operations | |
163 | */ | |
164 | __u32 cookieverf[2]; | |
165 | ||
166 | /* | |
167 | * This is the list of dirty unwritten pages. | |
168 | */ | |
169 | spinlock_t req_lock; | |
170 | struct list_head dirty; | |
171 | struct list_head commit; | |
172 | struct radix_tree_root nfs_page_tree; | |
173 | ||
174 | unsigned int ndirty, | |
175 | ncommit, | |
176 | npages; | |
177 | ||
178 | /* Open contexts for shared mmap writes */ | |
179 | struct list_head open_files; | |
180 | ||
1da177e4 | 181 | #ifdef CONFIG_NFS_V4 |
e50a1c2e | 182 | struct nfs4_cached_acl *nfs4_acl; |
1da177e4 LT |
183 | /* NFSv4 state */ |
184 | struct list_head open_states; | |
185 | struct nfs_delegation *delegation; | |
186 | int delegation_state; | |
187 | struct rw_semaphore rwsem; | |
188 | #endif /* CONFIG_NFS_V4*/ | |
1da177e4 LT |
189 | struct inode vfs_inode; |
190 | }; | |
191 | ||
192 | /* | |
55296809 | 193 | * Cache validity bit flags |
1da177e4 | 194 | */ |
55296809 CL |
195 | #define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */ |
196 | #define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ | |
197 | #define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ | |
198 | #define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ | |
199 | #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ | |
200 | #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ | |
201 | ||
202 | /* | |
412d582e | 203 | * Bit offsets in flags field |
55296809 | 204 | */ |
412d582e CL |
205 | #define NFS_INO_REVALIDATING (0) /* revalidating attrs */ |
206 | #define NFS_INO_ADVISE_RDPLUS (1) /* advise readdirplus */ | |
207 | #define NFS_INO_STALE (2) /* possible stale inode */ | |
1da177e4 LT |
208 | |
209 | static inline struct nfs_inode *NFS_I(struct inode *inode) | |
210 | { | |
211 | return container_of(inode, struct nfs_inode, vfs_inode); | |
212 | } | |
213 | #define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info)) | |
214 | ||
215 | #define NFS_FH(inode) (&NFS_I(inode)->fh) | |
216 | #define NFS_SERVER(inode) (NFS_SB(inode->i_sb)) | |
217 | #define NFS_CLIENT(inode) (NFS_SERVER(inode)->client) | |
218 | #define NFS_PROTO(inode) (NFS_SERVER(inode)->rpc_ops) | |
219 | #define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode))) | |
220 | #define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf) | |
221 | #define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies) | |
222 | #define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr) | |
223 | #define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo) | |
224 | #define NFS_MINATTRTIMEO(inode) \ | |
225 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \ | |
226 | : NFS_SERVER(inode)->acregmin) | |
227 | #define NFS_MAXATTRTIMEO(inode) \ | |
228 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \ | |
229 | : NFS_SERVER(inode)->acregmax) | |
230 | #define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp) | |
231 | ||
232 | #define NFS_FLAGS(inode) (NFS_I(inode)->flags) | |
412d582e | 233 | #define NFS_STALE(inode) (test_bit(NFS_INO_STALE, &NFS_FLAGS(inode))) |
1da177e4 LT |
234 | |
235 | #define NFS_FILEID(inode) (NFS_I(inode)->fileid) | |
236 | ||
237 | static inline int nfs_caches_unstable(struct inode *inode) | |
238 | { | |
239 | return atomic_read(&NFS_I(inode)->data_updates) != 0; | |
240 | } | |
241 | ||
decf491f TM |
242 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
243 | { | |
244 | spin_lock(&inode->i_lock); | |
245 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; | |
246 | spin_unlock(&inode->i_lock); | |
247 | } | |
248 | ||
1da177e4 LT |
249 | static inline void NFS_CACHEINV(struct inode *inode) |
250 | { | |
decf491f TM |
251 | if (!nfs_caches_unstable(inode)) |
252 | nfs_mark_for_revalidate(inode); | |
1da177e4 LT |
253 | } |
254 | ||
255 | static inline int nfs_server_capable(struct inode *inode, int cap) | |
256 | { | |
257 | return NFS_SERVER(inode)->caps & cap; | |
258 | } | |
259 | ||
260 | static inline int NFS_USE_READDIRPLUS(struct inode *inode) | |
261 | { | |
412d582e | 262 | return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
1da177e4 LT |
263 | } |
264 | ||
265 | /** | |
266 | * nfs_save_change_attribute - Returns the inode attribute change cookie | |
267 | * @inode - pointer to inode | |
268 | * The "change attribute" is updated every time we finish an operation | |
269 | * that will result in a metadata change on the server. | |
270 | */ | |
271 | static inline long nfs_save_change_attribute(struct inode *inode) | |
272 | { | |
273 | return NFS_I(inode)->cache_change_attribute; | |
274 | } | |
275 | ||
276 | /** | |
277 | * nfs_verify_change_attribute - Detects NFS inode cache updates | |
278 | * @inode - pointer to inode | |
279 | * @chattr - previously saved change attribute | |
280 | * Return "false" if metadata has been updated (or is in the process of | |
281 | * being updated) since the change attribute was saved. | |
282 | */ | |
283 | static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr) | |
284 | { | |
285 | return !nfs_caches_unstable(inode) | |
913a70fc | 286 | && time_after_eq(chattr, NFS_I(inode)->cache_change_attribute); |
1da177e4 LT |
287 | } |
288 | ||
289 | /* | |
290 | * linux/fs/nfs/inode.c | |
291 | */ | |
29884df0 | 292 | extern int nfs_sync_mapping(struct address_space *mapping); |
1da177e4 LT |
293 | extern void nfs_zap_caches(struct inode *); |
294 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, | |
295 | struct nfs_fattr *); | |
296 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); | |
decf491f | 297 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
1da177e4 LT |
298 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
299 | extern int nfs_permission(struct inode *, int, struct nameidata *); | |
300 | extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *); | |
301 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); | |
302 | extern int nfs_open(struct inode *, struct file *); | |
303 | extern int nfs_release(struct inode *, struct file *); | |
304 | extern int nfs_attribute_timeout(struct inode *inode); | |
305 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); | |
306 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); | |
7d52e862 | 307 | extern void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
1da177e4 | 308 | extern int nfs_setattr(struct dentry *, struct iattr *); |
65e4308d | 309 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); |
1da177e4 LT |
310 | extern void nfs_begin_attr_update(struct inode *); |
311 | extern void nfs_end_attr_update(struct inode *); | |
312 | extern void nfs_begin_data_update(struct inode *); | |
313 | extern void nfs_end_data_update(struct inode *); | |
1da177e4 LT |
314 | extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred); |
315 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); | |
316 | extern void put_nfs_open_context(struct nfs_open_context *ctx); | |
317 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); | |
d530838b | 318 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode); |
1da177e4 LT |
319 | extern void nfs_file_clear_open_context(struct file *filp); |
320 | ||
321 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ | |
322 | extern u32 root_nfs_parse_addr(char *name); /*__init*/ | |
323 | ||
0e574af1 TM |
324 | static inline void nfs_fattr_init(struct nfs_fattr *fattr) |
325 | { | |
326 | fattr->valid = 0; | |
33801147 | 327 | fattr->time_start = jiffies; |
0e574af1 TM |
328 | } |
329 | ||
1da177e4 LT |
330 | /* |
331 | * linux/fs/nfs/file.c | |
332 | */ | |
333 | extern struct inode_operations nfs_file_inode_operations; | |
b7fa0554 AG |
334 | #ifdef CONFIG_NFS_V3 |
335 | extern struct inode_operations nfs3_file_inode_operations; | |
336 | #endif /* CONFIG_NFS_V3 */ | |
1da177e4 LT |
337 | extern struct file_operations nfs_file_operations; |
338 | extern struct address_space_operations nfs_file_aops; | |
339 | ||
340 | static inline struct rpc_cred *nfs_file_cred(struct file *file) | |
341 | { | |
342 | if (file != NULL) { | |
343 | struct nfs_open_context *ctx; | |
344 | ||
345 | ctx = (struct nfs_open_context*)file->private_data; | |
346 | return ctx->cred; | |
347 | } | |
348 | return NULL; | |
349 | } | |
350 | ||
b7fa0554 AG |
351 | /* |
352 | * linux/fs/nfs/xattr.c | |
353 | */ | |
354 | #ifdef CONFIG_NFS_V3_ACL | |
355 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); | |
356 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); | |
357 | extern int nfs3_setxattr(struct dentry *, const char *, | |
358 | const void *, size_t, int); | |
359 | extern int nfs3_removexattr (struct dentry *, const char *name); | |
360 | #else | |
361 | # define nfs3_listxattr NULL | |
362 | # define nfs3_getxattr NULL | |
363 | # define nfs3_setxattr NULL | |
364 | # define nfs3_removexattr NULL | |
365 | #endif | |
366 | ||
1da177e4 LT |
367 | /* |
368 | * linux/fs/nfs/direct.c | |
369 | */ | |
370 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, | |
371 | unsigned long); | |
372 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf, | |
373 | size_t count, loff_t pos); | |
374 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf, | |
375 | size_t count, loff_t pos); | |
376 | ||
377 | /* | |
378 | * linux/fs/nfs/dir.c | |
379 | */ | |
380 | extern struct inode_operations nfs_dir_inode_operations; | |
b7fa0554 AG |
381 | #ifdef CONFIG_NFS_V3 |
382 | extern struct inode_operations nfs3_dir_inode_operations; | |
383 | #endif /* CONFIG_NFS_V3 */ | |
1da177e4 LT |
384 | extern struct file_operations nfs_dir_operations; |
385 | extern struct dentry_operations nfs_dentry_operations; | |
386 | ||
387 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); | |
388 | ||
389 | /* | |
390 | * linux/fs/nfs/symlink.c | |
391 | */ | |
392 | extern struct inode_operations nfs_symlink_inode_operations; | |
393 | ||
a72b4422 TM |
394 | /* |
395 | * linux/fs/nfs/sysctl.c | |
396 | */ | |
397 | #ifdef CONFIG_SYSCTL | |
398 | extern int nfs_register_sysctl(void); | |
399 | extern void nfs_unregister_sysctl(void); | |
400 | #else | |
401 | #define nfs_register_sysctl() do { } while(0) | |
402 | #define nfs_unregister_sysctl() do { } while(0) | |
403 | #endif | |
404 | ||
1da177e4 LT |
405 | /* |
406 | * linux/fs/nfs/unlink.c | |
407 | */ | |
408 | extern int nfs_async_unlink(struct dentry *); | |
409 | extern void nfs_complete_unlink(struct dentry *); | |
410 | ||
411 | /* | |
412 | * linux/fs/nfs/write.c | |
413 | */ | |
414 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); | |
415 | extern int nfs_writepages(struct address_space *, struct writeback_control *); | |
416 | extern int nfs_flush_incompatible(struct file *file, struct page *page); | |
417 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); | |
963d8fe5 TM |
418 | extern void nfs_writeback_done(struct rpc_task *task, void *data); |
419 | extern void nfs_writedata_release(void *data); | |
1da177e4 LT |
420 | |
421 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) | |
963d8fe5 TM |
422 | extern void nfs_commit_done(struct rpc_task *, void *data); |
423 | extern void nfs_commit_release(void *data); | |
1da177e4 LT |
424 | #endif |
425 | ||
426 | /* | |
427 | * Try to write back everything synchronously (but check the | |
428 | * return value!) | |
429 | */ | |
430 | extern int nfs_sync_inode(struct inode *, unsigned long, unsigned int, int); | |
431 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) | |
3da28eb1 | 432 | extern int nfs_commit_inode(struct inode *, int); |
1da177e4 LT |
433 | #else |
434 | static inline int | |
3da28eb1 | 435 | nfs_commit_inode(struct inode *inode, int how) |
1da177e4 LT |
436 | { |
437 | return 0; | |
438 | } | |
439 | #endif | |
440 | ||
441 | static inline int | |
442 | nfs_have_writebacks(struct inode *inode) | |
443 | { | |
444 | return NFS_I(inode)->npages != 0; | |
445 | } | |
446 | ||
447 | static inline int | |
448 | nfs_wb_all(struct inode *inode) | |
449 | { | |
450 | int error = nfs_sync_inode(inode, 0, 0, FLUSH_WAIT); | |
451 | return (error < 0) ? error : 0; | |
452 | } | |
453 | ||
454 | /* | |
455 | * Write back all requests on one page - we do this before reading it. | |
456 | */ | |
457 | static inline int nfs_wb_page_priority(struct inode *inode, struct page* page, int how) | |
458 | { | |
459 | int error = nfs_sync_inode(inode, page->index, 1, | |
460 | how | FLUSH_WAIT | FLUSH_STABLE); | |
461 | return (error < 0) ? error : 0; | |
462 | } | |
463 | ||
464 | static inline int nfs_wb_page(struct inode *inode, struct page* page) | |
465 | { | |
466 | return nfs_wb_page_priority(inode, page, 0); | |
467 | } | |
468 | ||
469 | /* | |
470 | * Allocate and free nfs_write_data structures | |
471 | */ | |
472 | extern mempool_t *nfs_wdata_mempool; | |
473 | ||
40859d7e | 474 | static inline struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount) |
1da177e4 LT |
475 | { |
476 | struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, SLAB_NOFS); | |
40859d7e | 477 | |
1da177e4 LT |
478 | if (p) { |
479 | memset(p, 0, sizeof(*p)); | |
480 | INIT_LIST_HEAD(&p->pages); | |
40859d7e CL |
481 | if (pagecount < NFS_PAGEVEC_SIZE) |
482 | p->pagevec = &p->page_array[0]; | |
483 | else { | |
484 | size_t size = ++pagecount * sizeof(struct page *); | |
485 | p->pagevec = kmalloc(size, GFP_NOFS); | |
486 | if (p->pagevec) { | |
487 | memset(p->pagevec, 0, size); | |
488 | } else { | |
489 | mempool_free(p, nfs_wdata_mempool); | |
490 | p = NULL; | |
491 | } | |
492 | } | |
1da177e4 LT |
493 | } |
494 | return p; | |
495 | } | |
496 | ||
497 | static inline void nfs_writedata_free(struct nfs_write_data *p) | |
498 | { | |
40859d7e CL |
499 | if (p && (p->pagevec != &p->page_array[0])) |
500 | kfree(p->pagevec); | |
1da177e4 LT |
501 | mempool_free(p, nfs_wdata_mempool); |
502 | } | |
503 | ||
1da177e4 LT |
504 | /* |
505 | * linux/fs/nfs/read.c | |
506 | */ | |
507 | extern int nfs_readpage(struct file *, struct page *); | |
508 | extern int nfs_readpages(struct file *, struct address_space *, | |
509 | struct list_head *, unsigned); | |
963d8fe5 TM |
510 | extern void nfs_readpage_result(struct rpc_task *, void *); |
511 | extern void nfs_readdata_release(void *data); | |
512 | ||
1da177e4 LT |
513 | |
514 | /* | |
515 | * Allocate and free nfs_read_data structures | |
516 | */ | |
517 | extern mempool_t *nfs_rdata_mempool; | |
518 | ||
40859d7e | 519 | static inline struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount) |
1da177e4 LT |
520 | { |
521 | struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, SLAB_NOFS); | |
40859d7e CL |
522 | |
523 | if (p) { | |
1da177e4 | 524 | memset(p, 0, sizeof(*p)); |
40859d7e CL |
525 | INIT_LIST_HEAD(&p->pages); |
526 | if (pagecount < NFS_PAGEVEC_SIZE) | |
527 | p->pagevec = &p->page_array[0]; | |
528 | else { | |
529 | size_t size = ++pagecount * sizeof(struct page *); | |
530 | p->pagevec = kmalloc(size, GFP_NOFS); | |
531 | if (p->pagevec) { | |
532 | memset(p->pagevec, 0, size); | |
533 | } else { | |
534 | mempool_free(p, nfs_rdata_mempool); | |
535 | p = NULL; | |
536 | } | |
537 | } | |
538 | } | |
1da177e4 LT |
539 | return p; |
540 | } | |
541 | ||
542 | static inline void nfs_readdata_free(struct nfs_read_data *p) | |
543 | { | |
40859d7e CL |
544 | if (p && (p->pagevec != &p->page_array[0])) |
545 | kfree(p->pagevec); | |
1da177e4 LT |
546 | mempool_free(p, nfs_rdata_mempool); |
547 | } | |
548 | ||
b7fa0554 AG |
549 | /* |
550 | * linux/fs/nfs3proc.c | |
551 | */ | |
552 | #ifdef CONFIG_NFS_V3_ACL | |
553 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); | |
554 | extern int nfs3_proc_setacl(struct inode *inode, int type, | |
555 | struct posix_acl *acl); | |
055ffbea AG |
556 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
557 | mode_t mode); | |
5c6a9f7d | 558 | extern void nfs3_forget_cached_acls(struct inode *inode); |
055ffbea AG |
559 | #else |
560 | static inline int nfs3_proc_set_default_acl(struct inode *dir, | |
561 | struct inode *inode, | |
562 | mode_t mode) | |
563 | { | |
564 | return 0; | |
565 | } | |
5c6a9f7d AG |
566 | |
567 | static inline void nfs3_forget_cached_acls(struct inode *inode) | |
568 | { | |
569 | } | |
b7fa0554 AG |
570 | #endif /* CONFIG_NFS_V3_ACL */ |
571 | ||
1da177e4 LT |
572 | /* |
573 | * linux/fs/mount_clnt.c | |
574 | * (Used only by nfsroot module) | |
575 | */ | |
576 | extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *, | |
577 | int, int); | |
578 | ||
579 | /* | |
580 | * inline functions | |
581 | */ | |
582 | ||
583 | static inline loff_t | |
584 | nfs_size_to_loff_t(__u64 size) | |
585 | { | |
586 | loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1; | |
587 | if (size > maxsz) | |
588 | return maxsz; | |
589 | return (loff_t) size; | |
590 | } | |
591 | ||
592 | static inline ino_t | |
593 | nfs_fileid_to_ino_t(u64 fileid) | |
594 | { | |
595 | ino_t ino = (ino_t) fileid; | |
596 | if (sizeof(ino_t) < sizeof(u64)) | |
597 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; | |
598 | return ino; | |
599 | } | |
600 | ||
601 | /* NFS root */ | |
602 | ||
603 | extern void * nfs_root_data(void); | |
604 | ||
605 | #define nfs_wait_event(clnt, wq, condition) \ | |
606 | ({ \ | |
607 | int __retval = 0; \ | |
608 | if (clnt->cl_intr) { \ | |
609 | sigset_t oldmask; \ | |
610 | rpc_clnt_sigmask(clnt, &oldmask); \ | |
611 | __retval = wait_event_interruptible(wq, condition); \ | |
612 | rpc_clnt_sigunmask(clnt, &oldmask); \ | |
613 | } else \ | |
614 | wait_event(wq, condition); \ | |
615 | __retval; \ | |
616 | }) | |
617 | ||
618 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) | |
619 | ||
1da177e4 LT |
620 | #endif /* __KERNEL__ */ |
621 | ||
622 | /* | |
623 | * NFS debug flags | |
624 | */ | |
625 | #define NFSDBG_VFS 0x0001 | |
626 | #define NFSDBG_DIRCACHE 0x0002 | |
627 | #define NFSDBG_LOOKUPCACHE 0x0004 | |
628 | #define NFSDBG_PAGECACHE 0x0008 | |
629 | #define NFSDBG_PROC 0x0010 | |
630 | #define NFSDBG_XDR 0x0020 | |
631 | #define NFSDBG_FILE 0x0040 | |
632 | #define NFSDBG_ROOT 0x0080 | |
633 | #define NFSDBG_CALLBACK 0x0100 | |
634 | #define NFSDBG_ALL 0xFFFF | |
635 | ||
636 | #ifdef __KERNEL__ | |
637 | # undef ifdebug | |
638 | # ifdef NFS_DEBUG | |
639 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) | |
640 | # else | |
641 | # define ifdebug(fac) if (0) | |
642 | # endif | |
643 | #endif /* __KERNEL */ | |
644 | ||
645 | #endif |