Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/inode.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs inode and superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
1da177e4 LT |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | */ | |
15 | ||
1da177e4 LT |
16 | #include <linux/module.h> |
17 | #include <linux/init.h> | |
e8edc6e0 | 18 | #include <linux/sched.h> |
1da177e4 LT |
19 | #include <linux/time.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/unistd.h> | |
26 | #include <linux/sunrpc/clnt.h> | |
27 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 28 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
29 | #include <linux/nfs_fs.h> |
30 | #include <linux/nfs_mount.h> | |
31 | #include <linux/nfs4_mount.h> | |
32 | #include <linux/lockd/bind.h> | |
33 | #include <linux/smp_lock.h> | |
34 | #include <linux/seq_file.h> | |
35 | #include <linux/mount.h> | |
36 | #include <linux/nfs_idmap.h> | |
37 | #include <linux/vfs.h> | |
9cdb3883 MN |
38 | #include <linux/inet.h> |
39 | #include <linux/nfs_xdr.h> | |
1da177e4 LT |
40 | |
41 | #include <asm/system.h> | |
42 | #include <asm/uaccess.h> | |
43 | ||
4ce79717 | 44 | #include "nfs4_fs.h" |
a72b4422 | 45 | #include "callback.h" |
1da177e4 | 46 | #include "delegation.h" |
d9ef5a8c | 47 | #include "iostat.h" |
f7b422b1 | 48 | #include "internal.h" |
1da177e4 LT |
49 | |
50 | #define NFSDBG_FACILITY NFSDBG_VFS | |
1da177e4 | 51 | |
f43bf0be TM |
52 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
53 | ||
54 | /* Default is to see 64-bit inode numbers */ | |
55 | static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; | |
56 | ||
1da177e4 | 57 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 58 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 59 | |
e18b890b | 60 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 61 | |
1da177e4 LT |
62 | static inline unsigned long |
63 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
64 | { | |
65 | return nfs_fileid_to_ino_t(fattr->fileid); | |
66 | } | |
67 | ||
f43bf0be TM |
68 | /** |
69 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
70 | * @fileid: 64-bit fileid | |
71 | * | |
72 | * This function returns a 32-bit inode number if the boot parameter | |
73 | * nfs.enable_ino64 is zero. | |
74 | */ | |
75 | u64 nfs_compat_user_ino64(u64 fileid) | |
76 | { | |
77 | int ino; | |
78 | ||
79 | if (enable_ino64) | |
80 | return fileid; | |
81 | ino = fileid; | |
82 | if (sizeof(ino) < sizeof(fileid)) | |
83 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
84 | return ino; | |
85 | } | |
86 | ||
f7b422b1 | 87 | int nfs_write_inode(struct inode *inode, int sync) |
1da177e4 | 88 | { |
1da177e4 LT |
89 | int ret; |
90 | ||
d30c8348 TM |
91 | if (sync) { |
92 | ret = filemap_fdatawait(inode->i_mapping); | |
93 | if (ret == 0) | |
94 | ret = nfs_commit_inode(inode, FLUSH_SYNC); | |
95 | } else | |
96 | ret = nfs_commit_inode(inode, 0); | |
97 | if (ret >= 0) | |
98 | return 0; | |
99 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); | |
100 | return ret; | |
1da177e4 LT |
101 | } |
102 | ||
f7b422b1 | 103 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 104 | { |
da6d503a TM |
105 | /* |
106 | * The following should never happen... | |
107 | */ | |
108 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 109 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 110 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 111 | nfs_access_zap_cache(inode); |
1da177e4 LT |
112 | } |
113 | ||
29884df0 TM |
114 | /** |
115 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
116 | */ | |
117 | int nfs_sync_mapping(struct address_space *mapping) | |
118 | { | |
119 | int ret; | |
120 | ||
121 | if (mapping->nrpages == 0) | |
122 | return 0; | |
123 | unmap_mapping_range(mapping, 0, 0, 0); | |
28fd1298 | 124 | ret = filemap_write_and_wait(mapping); |
29884df0 TM |
125 | if (ret != 0) |
126 | goto out; | |
127 | ret = nfs_wb_all(mapping->host); | |
128 | out: | |
129 | return ret; | |
130 | } | |
131 | ||
1da177e4 LT |
132 | /* |
133 | * Invalidate the local caches | |
134 | */ | |
b37b03b7 | 135 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
136 | { |
137 | struct nfs_inode *nfsi = NFS_I(inode); | |
138 | int mode = inode->i_mode; | |
139 | ||
91d5b470 CL |
140 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
141 | ||
c7c20973 TM |
142 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
143 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 LT |
144 | |
145 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
146 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 147 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 148 | else |
55296809 | 149 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 150 | } |
dc59250c | 151 | |
b37b03b7 TM |
152 | void nfs_zap_caches(struct inode *inode) |
153 | { | |
154 | spin_lock(&inode->i_lock); | |
155 | nfs_zap_caches_locked(inode); | |
dc59250c | 156 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
157 | } |
158 | ||
cd9ae2b6 TM |
159 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
160 | { | |
161 | if (mapping->nrpages != 0) { | |
162 | spin_lock(&inode->i_lock); | |
163 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
164 | spin_unlock(&inode->i_lock); | |
165 | } | |
166 | } | |
167 | ||
f41f7418 | 168 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
169 | { |
170 | void (*clear_acl_cache)(struct inode *); | |
171 | ||
172 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
173 | if (clear_acl_cache != NULL) | |
174 | clear_acl_cache(inode); | |
dc59250c | 175 | spin_lock(&inode->i_lock); |
55296809 | 176 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 177 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
178 | } |
179 | ||
c4812998 TM |
180 | void nfs_invalidate_atime(struct inode *inode) |
181 | { | |
182 | spin_lock(&inode->i_lock); | |
183 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
184 | spin_unlock(&inode->i_lock); | |
185 | } | |
186 | ||
1da177e4 | 187 | /* |
b37b03b7 TM |
188 | * Invalidate, but do not unhash, the inode. |
189 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 190 | */ |
b37b03b7 | 191 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 192 | { |
3a10c30a | 193 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 194 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
195 | } |
196 | ||
197 | struct nfs_find_desc { | |
198 | struct nfs_fh *fh; | |
199 | struct nfs_fattr *fattr; | |
200 | }; | |
201 | ||
202 | /* | |
203 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
204 | * this, and re-exported directories (also seen in NFSv2) | |
205 | * we are forced to allow 2 different inodes to have the same | |
206 | * i_ino. | |
207 | */ | |
208 | static int | |
209 | nfs_find_actor(struct inode *inode, void *opaque) | |
210 | { | |
211 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
212 | struct nfs_fh *fh = desc->fh; | |
213 | struct nfs_fattr *fattr = desc->fattr; | |
214 | ||
215 | if (NFS_FILEID(inode) != fattr->fileid) | |
216 | return 0; | |
217 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
218 | return 0; | |
219 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
220 | return 0; | |
221 | return 1; | |
222 | } | |
223 | ||
224 | static int | |
225 | nfs_init_locked(struct inode *inode, void *opaque) | |
226 | { | |
227 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
228 | struct nfs_fattr *fattr = desc->fattr; | |
229 | ||
99fadcd7 | 230 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
231 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
232 | return 0; | |
233 | } | |
234 | ||
235 | /* Don't use READDIRPLUS on directories that we believe are too large */ | |
236 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) | |
237 | ||
238 | /* | |
239 | * This is our front-end to iget that looks up inodes by file handle | |
240 | * instead of inode number. | |
241 | */ | |
242 | struct inode * | |
243 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
244 | { | |
245 | struct nfs_find_desc desc = { | |
246 | .fh = fh, | |
247 | .fattr = fattr | |
248 | }; | |
03f28e3a | 249 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
250 | unsigned long hash; |
251 | ||
252 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
253 | goto out_no_inode; | |
254 | ||
255 | if (!fattr->nlink) { | |
256 | printk("NFS: Buggy server - nlink == 0!\n"); | |
257 | goto out_no_inode; | |
258 | } | |
259 | ||
260 | hash = nfs_fattr_to_ino_t(fattr); | |
261 | ||
03f28e3a TM |
262 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
263 | if (inode == NULL) { | |
264 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 265 | goto out_no_inode; |
03f28e3a | 266 | } |
1da177e4 LT |
267 | |
268 | if (inode->i_state & I_NEW) { | |
269 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 270 | unsigned long now = jiffies; |
1da177e4 LT |
271 | |
272 | /* We set i_ino for the few things that still rely on it, | |
273 | * such as stat(2) */ | |
274 | inode->i_ino = hash; | |
275 | ||
276 | /* We can't support update_atime(), since the server will reset it */ | |
277 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
278 | inode->i_mode = fattr->mode; | |
279 | /* Why so? Because we want revalidate for devices/FIFOs, and | |
280 | * that's precisely what we have in nfs_file_inode_operations. | |
281 | */ | |
8fa5c000 | 282 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 LT |
283 | if (S_ISREG(inode->i_mode)) { |
284 | inode->i_fop = &nfs_file_operations; | |
285 | inode->i_data.a_ops = &nfs_file_aops; | |
286 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
287 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 288 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 LT |
289 | inode->i_fop = &nfs_dir_operations; |
290 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) | |
291 | && fattr->size <= NFS_LIMIT_READDIRPLUS) | |
3a10c30a | 292 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
55a97593 TM |
293 | /* Deal with crossing mountpoints */ |
294 | if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { | |
6b97fd3d MN |
295 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
296 | inode->i_op = &nfs_referral_inode_operations; | |
297 | else | |
298 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 299 | inode->i_fop = NULL; |
c37dcd33 | 300 | set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags); |
55a97593 | 301 | } |
1da177e4 LT |
302 | } else if (S_ISLNK(inode->i_mode)) |
303 | inode->i_op = &nfs_symlink_inode_operations; | |
304 | else | |
305 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
306 | ||
33801147 | 307 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 308 | nfsi->attr_gencount = fattr->gencount; |
1da177e4 LT |
309 | inode->i_atime = fattr->atime; |
310 | inode->i_mtime = fattr->mtime; | |
311 | inode->i_ctime = fattr->ctime; | |
312 | if (fattr->valid & NFS_ATTR_FATTR_V4) | |
313 | nfsi->change_attr = fattr->change_attr; | |
314 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
315 | inode->i_nlink = fattr->nlink; | |
316 | inode->i_uid = fattr->uid; | |
317 | inode->i_gid = fattr->gid; | |
318 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
319 | /* | |
320 | * report the blocks in 512byte units | |
321 | */ | |
322 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
323 | } else { |
324 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
325 | } |
326 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 327 | nfsi->attrtimeo_timestamp = now; |
1da177e4 | 328 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
1c3c07e9 | 329 | nfsi->access_cache = RB_ROOT; |
1da177e4 LT |
330 | |
331 | unlock_new_inode(inode); | |
332 | } else | |
333 | nfs_refresh_inode(inode, fattr); | |
334 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
335 | inode->i_sb->s_id, | |
336 | (long long)NFS_FILEID(inode), | |
337 | atomic_read(&inode->i_count)); | |
338 | ||
339 | out: | |
340 | return inode; | |
341 | ||
342 | out_no_inode: | |
03f28e3a | 343 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
344 | goto out; |
345 | } | |
346 | ||
659bfcd6 | 347 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE) |
1da177e4 LT |
348 | |
349 | int | |
350 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
351 | { | |
352 | struct inode *inode = dentry->d_inode; | |
353 | struct nfs_fattr fattr; | |
354 | int error; | |
355 | ||
91d5b470 CL |
356 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
357 | ||
188b95dd JL |
358 | /* skip mode change if it's just for clearing setuid/setgid */ |
359 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
360 | attr->ia_valid &= ~ATTR_MODE; | |
361 | ||
1da177e4 LT |
362 | if (attr->ia_valid & ATTR_SIZE) { |
363 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
364 | attr->ia_valid &= ~ATTR_SIZE; | |
365 | } | |
366 | ||
367 | /* Optimization: if the end result is no change, don't RPC */ | |
368 | attr->ia_valid &= NFS_VALID_ATTRS; | |
659bfcd6 | 369 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
1da177e4 LT |
370 | return 0; |
371 | ||
755c1e20 | 372 | /* Write all dirty data */ |
e1552e19 TM |
373 | if (S_ISREG(inode->i_mode)) { |
374 | filemap_write_and_wait(inode->i_mapping); | |
375 | nfs_wb_all(inode); | |
376 | } | |
642ac549 TM |
377 | /* |
378 | * Return any delegations if we're going to change ACLs | |
379 | */ | |
380 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
381 | nfs_inode_return_delegation(inode); | |
1da177e4 | 382 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
65e4308d | 383 | if (error == 0) |
1da177e4 | 384 | nfs_refresh_inode(inode, &fattr); |
65e4308d TM |
385 | return error; |
386 | } | |
387 | ||
a3d01454 TM |
388 | /** |
389 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
390 | * @inode: inode of the file used | |
391 | * @offset: file offset to start truncating | |
392 | * | |
393 | * This is a copy of the common vmtruncate, but with the locking | |
394 | * corrected to take into account the fact that NFS requires | |
395 | * inode->i_size to be updated under the inode->i_lock. | |
396 | */ | |
397 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
398 | { | |
399 | if (i_size_read(inode) < offset) { | |
400 | unsigned long limit; | |
401 | ||
402 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; | |
403 | if (limit != RLIM_INFINITY && offset > limit) | |
404 | goto out_sig; | |
405 | if (offset > inode->i_sb->s_maxbytes) | |
406 | goto out_big; | |
407 | spin_lock(&inode->i_lock); | |
408 | i_size_write(inode, offset); | |
409 | spin_unlock(&inode->i_lock); | |
410 | } else { | |
411 | struct address_space *mapping = inode->i_mapping; | |
412 | ||
413 | /* | |
414 | * truncation of in-use swapfiles is disallowed - it would | |
415 | * cause subsequent swapout to scribble on the now-freed | |
416 | * blocks. | |
417 | */ | |
418 | if (IS_SWAPFILE(inode)) | |
419 | return -ETXTBSY; | |
420 | spin_lock(&inode->i_lock); | |
421 | i_size_write(inode, offset); | |
422 | spin_unlock(&inode->i_lock); | |
423 | ||
424 | /* | |
425 | * unmap_mapping_range is called twice, first simply for | |
426 | * efficiency so that truncate_inode_pages does fewer | |
427 | * single-page unmaps. However after this first call, and | |
428 | * before truncate_inode_pages finishes, it is possible for | |
429 | * private pages to be COWed, which remain after | |
430 | * truncate_inode_pages finishes, hence the second | |
431 | * unmap_mapping_range call must be made for correctness. | |
432 | */ | |
433 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); | |
434 | truncate_inode_pages(mapping, offset); | |
435 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); | |
436 | } | |
437 | return 0; | |
438 | out_sig: | |
439 | send_sig(SIGXFSZ, current, 0); | |
440 | out_big: | |
441 | return -EFBIG; | |
442 | } | |
443 | ||
65e4308d TM |
444 | /** |
445 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
446 | * @inode: pointer to struct inode | |
447 | * @attr: pointer to struct iattr | |
448 | * | |
449 | * Note: we do this in the *proc.c in order to ensure that | |
450 | * it works for things like exclusive creates too. | |
451 | */ | |
452 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
453 | { | |
454 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 455 | spin_lock(&inode->i_lock); |
1da177e4 | 456 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
457 | int mode = attr->ia_mode & S_IALLUGO; |
458 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
459 | inode->i_mode = mode; |
460 | } | |
461 | if ((attr->ia_valid & ATTR_UID) != 0) | |
462 | inode->i_uid = attr->ia_uid; | |
463 | if ((attr->ia_valid & ATTR_GID) != 0) | |
464 | inode->i_gid = attr->ia_gid; | |
55296809 | 465 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 466 | spin_unlock(&inode->i_lock); |
65e4308d TM |
467 | } |
468 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 469 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 470 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 471 | } |
1da177e4 LT |
472 | } |
473 | ||
1da177e4 LT |
474 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
475 | { | |
476 | struct inode *inode = dentry->d_inode; | |
55296809 | 477 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
478 | int err; |
479 | ||
28c494c5 CL |
480 | /* |
481 | * Flush out writes to the server in order to update c/mtime. | |
482 | * | |
483 | * Hold the i_mutex to suspend application writes temporarily; | |
484 | * this prevents long-running writing applications from blocking | |
485 | * nfs_wb_nocommit. | |
486 | */ | |
487 | if (S_ISREG(inode->i_mode)) { | |
488 | mutex_lock(&inode->i_mutex); | |
ed90ef51 | 489 | nfs_wb_nocommit(inode); |
28c494c5 CL |
490 | mutex_unlock(&inode->i_mutex); |
491 | } | |
fc33a7bb CH |
492 | |
493 | /* | |
494 | * We may force a getattr if the user cares about atime. | |
495 | * | |
496 | * Note that we only have to check the vfsmount flags here: | |
497 | * - NFS always sets S_NOATIME by so checking it would give a | |
498 | * bogus result | |
499 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
500 | * no point in checking those. | |
501 | */ | |
502 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
503 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 504 | need_atime = 0; |
fc33a7bb | 505 | |
1da177e4 LT |
506 | if (need_atime) |
507 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
508 | else | |
509 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 510 | if (!err) { |
1da177e4 | 511 | generic_fillattr(inode, stat); |
f43bf0be | 512 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 513 | } |
1da177e4 LT |
514 | return err; |
515 | } | |
516 | ||
b92dccf6 | 517 | static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred) |
1da177e4 LT |
518 | { |
519 | struct nfs_open_context *ctx; | |
520 | ||
f52720ca | 521 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
1da177e4 | 522 | if (ctx != NULL) { |
88be9f99 TM |
523 | ctx->path.dentry = dget(dentry); |
524 | ctx->path.mnt = mntget(mnt); | |
1da177e4 LT |
525 | ctx->cred = get_rpccred(cred); |
526 | ctx->state = NULL; | |
527 | ctx->lockowner = current->files; | |
66d3aac0 | 528 | ctx->flags = 0; |
1da177e4 | 529 | ctx->error = 0; |
00a92642 | 530 | ctx->dir_cookie = 0; |
5e11934d | 531 | atomic_set(&ctx->count, 1); |
1da177e4 LT |
532 | } |
533 | return ctx; | |
534 | } | |
535 | ||
536 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
537 | { | |
538 | if (ctx != NULL) | |
5e11934d | 539 | atomic_inc(&ctx->count); |
1da177e4 LT |
540 | return ctx; |
541 | } | |
542 | ||
a49c3c77 | 543 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int wait) |
1da177e4 | 544 | { |
383ba719 | 545 | struct inode *inode; |
3bec63db | 546 | |
383ba719 TM |
547 | if (ctx == NULL) |
548 | return; | |
549 | ||
550 | inode = ctx->path.dentry->d_inode; | |
5e11934d TM |
551 | if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock)) |
552 | return; | |
553 | list_del(&ctx->list); | |
554 | spin_unlock(&inode->i_lock); | |
a49c3c77 TM |
555 | if (ctx->state != NULL) { |
556 | if (wait) | |
557 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); | |
558 | else | |
559 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); | |
560 | } | |
3bec63db TM |
561 | if (ctx->cred != NULL) |
562 | put_rpccred(ctx->cred); | |
31f31db1 | 563 | path_put(&ctx->path); |
3bec63db TM |
564 | kfree(ctx); |
565 | } | |
566 | ||
a49c3c77 TM |
567 | void put_nfs_open_context(struct nfs_open_context *ctx) |
568 | { | |
569 | __put_nfs_open_context(ctx, 0); | |
570 | } | |
571 | ||
572 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) | |
573 | { | |
574 | __put_nfs_open_context(ctx, 1); | |
575 | } | |
576 | ||
1da177e4 LT |
577 | /* |
578 | * Ensure that mmap has a recent RPC credential for use when writing out | |
579 | * shared pages | |
580 | */ | |
b92dccf6 | 581 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 582 | { |
01cce933 | 583 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
584 | struct nfs_inode *nfsi = NFS_I(inode); |
585 | ||
586 | filp->private_data = get_nfs_open_context(ctx); | |
587 | spin_lock(&inode->i_lock); | |
588 | list_add(&ctx->list, &nfsi->open_files); | |
589 | spin_unlock(&inode->i_lock); | |
590 | } | |
591 | ||
d530838b TM |
592 | /* |
593 | * Given an inode, search for an open context with the desired characteristics | |
594 | */ | |
dc0b027d | 595 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
596 | { |
597 | struct nfs_inode *nfsi = NFS_I(inode); | |
598 | struct nfs_open_context *pos, *ctx = NULL; | |
599 | ||
600 | spin_lock(&inode->i_lock); | |
601 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
602 | if (cred != NULL && pos->cred != cred) |
603 | continue; | |
1da177e4 LT |
604 | if ((pos->mode & mode) == mode) { |
605 | ctx = get_nfs_open_context(pos); | |
606 | break; | |
607 | } | |
608 | } | |
609 | spin_unlock(&inode->i_lock); | |
610 | return ctx; | |
611 | } | |
612 | ||
b92dccf6 | 613 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 614 | { |
01cce933 | 615 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 616 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
617 | |
618 | if (ctx) { | |
619 | filp->private_data = NULL; | |
620 | spin_lock(&inode->i_lock); | |
621 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
622 | spin_unlock(&inode->i_lock); | |
a49c3c77 | 623 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
624 | } |
625 | } | |
626 | ||
627 | /* | |
628 | * These allocate and release file read/write context information. | |
629 | */ | |
630 | int nfs_open(struct inode *inode, struct file *filp) | |
631 | { | |
632 | struct nfs_open_context *ctx; | |
633 | struct rpc_cred *cred; | |
634 | ||
98a8e323 | 635 | cred = rpc_lookup_cred(); |
1da177e4 LT |
636 | if (IS_ERR(cred)) |
637 | return PTR_ERR(cred); | |
01cce933 | 638 | ctx = alloc_nfs_open_context(filp->f_path.mnt, filp->f_path.dentry, cred); |
1da177e4 LT |
639 | put_rpccred(cred); |
640 | if (ctx == NULL) | |
641 | return -ENOMEM; | |
642 | ctx->mode = filp->f_mode; | |
643 | nfs_file_set_open_context(filp, ctx); | |
644 | put_nfs_open_context(ctx); | |
1da177e4 LT |
645 | return 0; |
646 | } | |
647 | ||
648 | int nfs_release(struct inode *inode, struct file *filp) | |
649 | { | |
1da177e4 LT |
650 | nfs_file_clear_open_context(filp); |
651 | return 0; | |
652 | } | |
653 | ||
654 | /* | |
655 | * This function is called whenever some part of NFS notices that | |
656 | * the cached attributes have to be refreshed. | |
657 | */ | |
658 | int | |
659 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
660 | { | |
661 | int status = -ESTALE; | |
662 | struct nfs_fattr fattr; | |
663 | struct nfs_inode *nfsi = NFS_I(inode); | |
1da177e4 LT |
664 | |
665 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
666 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
667 | ||
85233a7a | 668 | if (is_bad_inode(inode)) |
691beb13 | 669 | goto out; |
1da177e4 | 670 | if (NFS_STALE(inode)) |
412d582e | 671 | goto out; |
7fdc49c4 | 672 | |
7fdc49c4 TM |
673 | if (NFS_STALE(inode)) |
674 | goto out; | |
1da177e4 | 675 | |
691beb13 | 676 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
1da177e4 LT |
677 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
678 | if (status != 0) { | |
679 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
680 | inode->i_sb->s_id, | |
681 | (long long)NFS_FILEID(inode), status); | |
682 | if (status == -ESTALE) { | |
683 | nfs_zap_caches(inode); | |
684 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 685 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
686 | } |
687 | goto out; | |
688 | } | |
689 | ||
4dc05efb | 690 | status = nfs_refresh_inode(inode, &fattr); |
1da177e4 LT |
691 | if (status) { |
692 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
693 | inode->i_sb->s_id, | |
694 | (long long)NFS_FILEID(inode), status); | |
695 | goto out; | |
696 | } | |
55296809 | 697 | |
24aa1fe6 | 698 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 699 | nfs_zap_acl_cache(inode); |
55296809 | 700 | |
1da177e4 LT |
701 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
702 | inode->i_sb->s_id, | |
703 | (long long)NFS_FILEID(inode)); | |
704 | ||
412d582e | 705 | out: |
1da177e4 LT |
706 | return status; |
707 | } | |
708 | ||
709 | int nfs_attribute_timeout(struct inode *inode) | |
710 | { | |
711 | struct nfs_inode *nfsi = NFS_I(inode); | |
712 | ||
713 | if (nfs_have_delegation(inode, FMODE_READ)) | |
714 | return 0; | |
64672d55 | 715 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
1da177e4 LT |
716 | } |
717 | ||
718 | /** | |
719 | * nfs_revalidate_inode - Revalidate the inode attributes | |
720 | * @server - pointer to nfs_server struct | |
721 | * @inode - pointer to inode struct | |
722 | * | |
723 | * Updates inode attribute information by retrieving the data from the server. | |
724 | */ | |
725 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
726 | { | |
44b11874 | 727 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
1da177e4 LT |
728 | && !nfs_attribute_timeout(inode)) |
729 | return NFS_STALE(inode) ? -ESTALE : 0; | |
730 | return __nfs_revalidate_inode(server, inode); | |
731 | } | |
732 | ||
717d44e8 TM |
733 | static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
734 | { | |
735 | struct nfs_inode *nfsi = NFS_I(inode); | |
736 | ||
737 | if (mapping->nrpages != 0) { | |
738 | int ret = invalidate_inode_pages2(mapping); | |
739 | if (ret < 0) | |
740 | return ret; | |
741 | } | |
742 | spin_lock(&inode->i_lock); | |
743 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 744 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 745 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
746 | spin_unlock(&inode->i_lock); |
747 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
748 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", | |
749 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
750 | return 0; | |
751 | } | |
752 | ||
753 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) | |
754 | { | |
755 | int ret = 0; | |
756 | ||
757 | mutex_lock(&inode->i_mutex); | |
758 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) { | |
759 | ret = nfs_sync_mapping(mapping); | |
760 | if (ret == 0) | |
761 | ret = nfs_invalidate_mapping_nolock(inode, mapping); | |
762 | } | |
763 | mutex_unlock(&inode->i_mutex); | |
764 | return ret; | |
765 | } | |
766 | ||
7d52e862 | 767 | /** |
717d44e8 | 768 | * nfs_revalidate_mapping_nolock - Revalidate the pagecache |
7d52e862 TM |
769 | * @inode - pointer to host inode |
770 | * @mapping - pointer to mapping | |
771 | */ | |
717d44e8 | 772 | int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
7d52e862 TM |
773 | { |
774 | struct nfs_inode *nfsi = NFS_I(inode); | |
44b11874 TM |
775 | int ret = 0; |
776 | ||
44b11874 | 777 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
717d44e8 | 778 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { |
44b11874 | 779 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
717d44e8 TM |
780 | if (ret < 0) |
781 | goto out; | |
782 | } | |
783 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
784 | ret = nfs_invalidate_mapping_nolock(inode, mapping); | |
785 | out: | |
786 | return ret; | |
787 | } | |
7d52e862 | 788 | |
717d44e8 TM |
789 | /** |
790 | * nfs_revalidate_mapping - Revalidate the pagecache | |
791 | * @inode - pointer to host inode | |
792 | * @mapping - pointer to mapping | |
793 | * | |
794 | * This version of the function will take the inode->i_mutex and attempt to | |
795 | * flush out all dirty data if it needs to invalidate the page cache. | |
796 | */ | |
797 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
798 | { | |
799 | struct nfs_inode *nfsi = NFS_I(inode); | |
800 | int ret = 0; | |
dc59250c | 801 | |
717d44e8 TM |
802 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
803 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { | |
804 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
805 | if (ret < 0) | |
806 | goto out; | |
7d52e862 | 807 | } |
717d44e8 TM |
808 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
809 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 810 | out: |
44b11874 | 811 | return ret; |
7d52e862 TM |
812 | } |
813 | ||
a895b4a1 TM |
814 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
815 | { | |
816 | struct nfs_inode *nfsi = NFS_I(inode); | |
817 | ||
70ca8852 TM |
818 | if ((fattr->valid & NFS_ATTR_WCC_V4) != 0 && |
819 | nfsi->change_attr == fattr->pre_change_attr) { | |
820 | nfsi->change_attr = fattr->change_attr; | |
821 | if (S_ISDIR(inode->i_mode)) | |
822 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
823 | } | |
a895b4a1 TM |
824 | /* If we have atomic WCC data, we may update some attributes */ |
825 | if ((fattr->valid & NFS_ATTR_WCC) != 0) { | |
17cadc95 | 826 | if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) |
a895b4a1 | 827 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
a895b4a1 TM |
828 | if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { |
829 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); | |
e323ea46 TM |
830 | if (S_ISDIR(inode->i_mode)) |
831 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
a895b4a1 | 832 | } |
a3d01454 | 833 | if (i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) && |
8a8c74bf | 834 | nfsi->npages == 0) |
a3d01454 | 835 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
a895b4a1 TM |
836 | } |
837 | } | |
838 | ||
1da177e4 | 839 | /** |
33801147 | 840 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
841 | * @inode - pointer to inode |
842 | * @fattr - updated attributes | |
843 | * | |
844 | * Verifies the attribute cache. If we have just changed the attributes, | |
845 | * so that fattr carries weak cache consistency data, then it may | |
846 | * also update the ctime/mtime/change_attribute. | |
847 | */ | |
33801147 | 848 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
849 | { |
850 | struct nfs_inode *nfsi = NFS_I(inode); | |
851 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 852 | unsigned long invalid = 0; |
1da177e4 | 853 | |
dc59250c | 854 | |
ca62b9c3 TM |
855 | /* Has the inode gone and changed behind our back? */ |
856 | if (nfsi->fileid != fattr->fileid | |
857 | || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { | |
858 | return -EIO; | |
859 | } | |
860 | ||
9d1e9232 | 861 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
f1bb0b92 | 862 | nfsi->change_attr != fattr->change_attr) |
2a3f5fd4 | 863 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 864 | |
1da177e4 | 865 | /* Verify a few of the more important attributes */ |
f1bb0b92 | 866 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) |
2a3f5fd4 | 867 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
ca62b9c3 TM |
868 | |
869 | cur_size = i_size_read(inode); | |
870 | new_isize = nfs_size_to_loff_t(fattr->size); | |
fb374d24 | 871 | if (cur_size != new_isize && nfsi->npages == 0) |
2a3f5fd4 | 872 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 LT |
873 | |
874 | /* Have any file permissions changed? */ | |
875 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) | |
876 | || inode->i_uid != fattr->uid | |
877 | || inode->i_gid != fattr->gid) | |
2a3f5fd4 | 878 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
879 | |
880 | /* Has the link count changed? */ | |
881 | if (inode->i_nlink != fattr->nlink) | |
2a3f5fd4 | 882 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
883 | |
884 | if (!timespec_equal(&inode->i_atime, &fattr->atime)) | |
2a3f5fd4 TM |
885 | invalid |= NFS_INO_INVALID_ATIME; |
886 | ||
887 | if (invalid != 0) | |
888 | nfsi->cache_validity |= invalid; | |
1da177e4 | 889 | |
33801147 | 890 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
891 | return 0; |
892 | } | |
893 | ||
a10ad176 | 894 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 895 | { |
a10ad176 TM |
896 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
897 | } | |
898 | ||
899 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
900 | { | |
901 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); | |
902 | } | |
870a5be8 | 903 | |
ae05f269 | 904 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
905 | |
906 | static unsigned long nfs_read_attr_generation_counter(void) | |
907 | { | |
ae05f269 | 908 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
909 | } |
910 | ||
911 | unsigned long nfs_inc_attr_generation_counter(void) | |
912 | { | |
ae05f269 | 913 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
914 | } |
915 | ||
916 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
917 | { | |
918 | fattr->valid = 0; | |
919 | fattr->time_start = jiffies; | |
920 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
921 | } | |
922 | ||
a10ad176 TM |
923 | /** |
924 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
925 | * @inode - pointer to inode | |
926 | * @fattr - attributes | |
927 | * | |
928 | * Attempt to divine whether or not an RPC call reply carrying stale | |
929 | * attributes got scheduled after another call carrying updated ones. | |
930 | * | |
931 | * To do so, the function first assumes that a more recent ctime means | |
932 | * that the attributes in fattr are newer, however it also attempt to | |
933 | * catch the case where ctime either didn't change, or went backwards | |
934 | * (if someone reset the clock on the server) by looking at whether | |
935 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 936 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
937 | * |
938 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
939 | * more recent than the ones cached in the inode. | |
940 | * | |
941 | */ | |
942 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
943 | { | |
944 | const struct nfs_inode *nfsi = NFS_I(inode); | |
945 | ||
4704f0e2 | 946 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
947 | nfs_ctime_need_update(inode, fattr) || |
948 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 949 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
950 | } |
951 | ||
952 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
953 | { | |
954 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
955 | return nfs_update_inode(inode, fattr); |
956 | return nfs_check_inode_attributes(inode, fattr); | |
957 | } | |
958 | ||
33801147 TM |
959 | /** |
960 | * nfs_refresh_inode - try to update the inode attribute cache | |
961 | * @inode - pointer to inode | |
962 | * @fattr - updated attributes | |
963 | * | |
964 | * Check that an RPC call that returned attributes has not overlapped with | |
965 | * other recent updates of the inode metadata, then decide whether it is | |
966 | * safe to do a full update of the inode attributes, or whether just to | |
967 | * call nfs_check_inode_attributes. | |
968 | */ | |
969 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
970 | { | |
33801147 TM |
971 | int status; |
972 | ||
973 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
974 | return 0; | |
975 | spin_lock(&inode->i_lock); | |
870a5be8 | 976 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 TM |
977 | spin_unlock(&inode->i_lock); |
978 | return status; | |
979 | } | |
980 | ||
d65f557f TM |
981 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
982 | { | |
983 | struct nfs_inode *nfsi = NFS_I(inode); | |
984 | ||
985 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
986 | if (S_ISDIR(inode->i_mode)) | |
987 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
988 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
989 | return 0; | |
990 | return nfs_refresh_inode_locked(inode, fattr); | |
991 | } | |
992 | ||
decf491f TM |
993 | /** |
994 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
995 | * @inode - pointer to inode | |
996 | * @fattr - updated attributes | |
997 | * | |
998 | * After an operation that has changed the inode metadata, mark the | |
999 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1000 | * |
1001 | * NB: if the server didn't return any post op attributes, this | |
1002 | * function will force the retrieval of attributes before the next | |
1003 | * NFS request. Thus it should be used only for operations that | |
1004 | * are expected to change one or more attributes, to avoid | |
1005 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1006 | */ |
1007 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1008 | { | |
d65f557f | 1009 | int status; |
decf491f | 1010 | |
7668fdbe | 1011 | spin_lock(&inode->i_lock); |
d65f557f | 1012 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1013 | spin_unlock(&inode->i_lock); |
870a5be8 | 1014 | return status; |
decf491f TM |
1015 | } |
1016 | ||
70ca8852 TM |
1017 | /** |
1018 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1019 | * @inode - pointer to inode | |
1020 | * @fattr - updated attributes | |
1021 | * | |
1022 | * After an operation that has changed the inode metadata, mark the | |
1023 | * attribute cache as being invalid, then try to update it. Fake up | |
1024 | * weak cache consistency data, if none exist. | |
1025 | * | |
1026 | * This function is mainly designed to be used by the ->write_done() functions. | |
1027 | */ | |
1028 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1029 | { | |
d65f557f TM |
1030 | int status; |
1031 | ||
1032 | spin_lock(&inode->i_lock); | |
1033 | /* Don't do a WCC update if these attributes are already stale */ | |
1034 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1035 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
1036 | fattr->valid &= ~(NFS_ATTR_WCC_V4|NFS_ATTR_WCC); | |
1037 | goto out_noforce; | |
1038 | } | |
70ca8852 TM |
1039 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
1040 | (fattr->valid & NFS_ATTR_WCC_V4) == 0) { | |
1041 | fattr->pre_change_attr = NFS_I(inode)->change_attr; | |
1042 | fattr->valid |= NFS_ATTR_WCC_V4; | |
1043 | } | |
1044 | if ((fattr->valid & NFS_ATTR_FATTR) != 0 && | |
1045 | (fattr->valid & NFS_ATTR_WCC) == 0) { | |
1046 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); | |
1047 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); | |
a3d01454 | 1048 | fattr->pre_size = i_size_read(inode); |
70ca8852 TM |
1049 | fattr->valid |= NFS_ATTR_WCC; |
1050 | } | |
d65f557f TM |
1051 | out_noforce: |
1052 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1053 | spin_unlock(&inode->i_lock); | |
1054 | return status; | |
70ca8852 TM |
1055 | } |
1056 | ||
1da177e4 LT |
1057 | /* |
1058 | * Many nfs protocol calls return the new file attributes after | |
1059 | * an operation. Here we update the inode to reflect the state | |
1060 | * of the server's inode. | |
1061 | * | |
1062 | * This is a bit tricky because we have to make sure all dirty pages | |
1063 | * have been sent off to the server before calling invalidate_inode_pages. | |
1064 | * To make sure no other process adds more write requests while we try | |
1065 | * our best to flush them, we make them sleep during the attribute refresh. | |
1066 | * | |
1067 | * A very similar scenario holds for the dir cache. | |
1068 | */ | |
24aa1fe6 | 1069 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1070 | { |
8b4bdcf8 | 1071 | struct nfs_server *server; |
1da177e4 | 1072 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1073 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1074 | unsigned long invalid = 0; |
3e7d950a | 1075 | unsigned long now = jiffies; |
1da177e4 LT |
1076 | |
1077 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
3110ff80 | 1078 | __func__, inode->i_sb->s_id, inode->i_ino, |
1da177e4 LT |
1079 | atomic_read(&inode->i_count), fattr->valid); |
1080 | ||
325cfed9 CL |
1081 | if (nfsi->fileid != fattr->fileid) |
1082 | goto out_fileid; | |
1da177e4 LT |
1083 | |
1084 | /* | |
1085 | * Make sure the inode's type hasn't changed. | |
1086 | */ | |
33801147 | 1087 | if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1088 | goto out_changed; |
1089 | ||
8b4bdcf8 | 1090 | server = NFS_SERVER(inode); |
a0356862 | 1091 | /* Update the fsid? */ |
c37dcd33 TM |
1092 | if (S_ISDIR(inode->i_mode) && |
1093 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && | |
1094 | !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags)) | |
8b4bdcf8 TM |
1095 | server->fsid = fattr->fsid; |
1096 | ||
1da177e4 LT |
1097 | /* |
1098 | * Update the read time so we don't revalidate too often. | |
1099 | */ | |
33801147 | 1100 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1101 | |
f2115dc9 TM |
1102 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ATIME |
1103 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1104 | |
a895b4a1 TM |
1105 | /* Do atomic weak cache consistency updates */ |
1106 | nfs_wcc_update_inode(inode, fattr); | |
1107 | ||
47aabaa7 TM |
1108 | /* More cache consistency checks */ |
1109 | if (!(fattr->valid & NFS_ATTR_FATTR_V4)) { | |
1110 | /* NFSv2/v3: Check if the mtime agrees */ | |
1111 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { | |
1112 | dprintk("NFS: mtime change on server for file %s/%ld\n", | |
1113 | inode->i_sb->s_id, inode->i_ino); | |
1114 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
bfc69a45 TM |
1115 | if (S_ISDIR(inode->i_mode)) |
1116 | nfs_force_lookup_revalidate(inode); | |
47aabaa7 TM |
1117 | } |
1118 | /* If ctime has changed we should definitely clear access+acl caches */ | |
12b373eb | 1119 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) |
4704f0e2 | 1120 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
47aabaa7 TM |
1121 | } else if (nfsi->change_attr != fattr->change_attr) { |
1122 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
1123 | inode->i_sb->s_id, inode->i_ino); | |
1124 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
bfc69a45 TM |
1125 | if (S_ISDIR(inode->i_mode)) |
1126 | nfs_force_lookup_revalidate(inode); | |
47aabaa7 TM |
1127 | } |
1128 | ||
951a143b | 1129 | /* Check if our cached file size is stale */ |
1da177e4 LT |
1130 | new_isize = nfs_size_to_loff_t(fattr->size); |
1131 | cur_isize = i_size_read(inode); | |
951a143b | 1132 | if (new_isize != cur_isize) { |
b64e8a5e TM |
1133 | /* Do we perhaps have any outstanding writes, or has |
1134 | * the file grown beyond our last write? */ | |
1135 | if (nfsi->npages == 0 || new_isize > cur_isize) { | |
a3d01454 | 1136 | i_size_write(inode, new_isize); |
1da177e4 LT |
1137 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
1138 | } | |
951a143b TM |
1139 | dprintk("NFS: isize change on server for file %s/%ld\n", |
1140 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 LT |
1141 | } |
1142 | ||
1da177e4 | 1143 | |
47aabaa7 TM |
1144 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1145 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1da177e4 | 1146 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
47aabaa7 | 1147 | nfsi->change_attr = fattr->change_attr; |
1da177e4 LT |
1148 | |
1149 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) || | |
1150 | inode->i_uid != fattr->uid || | |
1151 | inode->i_gid != fattr->gid) | |
ada70d94 | 1152 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1da177e4 | 1153 | |
921615f1 TM |
1154 | if (inode->i_nlink != fattr->nlink) |
1155 | invalid |= NFS_INO_INVALID_ATTR; | |
1156 | ||
1da177e4 LT |
1157 | inode->i_mode = fattr->mode; |
1158 | inode->i_nlink = fattr->nlink; | |
1159 | inode->i_uid = fattr->uid; | |
1160 | inode->i_gid = fattr->gid; | |
1161 | ||
1162 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
1163 | /* | |
1164 | * report the blocks in 512byte units | |
1165 | */ | |
1166 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
1167 | } else { |
1168 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1169 | } |
1170 | ||
1171 | /* Update attrtimeo value if we're out of the unstable period */ | |
1172 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1173 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1174 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1175 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1176 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1177 | } else { |
64672d55 | 1178 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1179 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1180 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1181 | nfsi->attrtimeo_timestamp = now; | |
1182 | } | |
1da177e4 | 1183 | } |
f2115dc9 | 1184 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1185 | /* Don't invalidate the data if we were to blame */ |
1186 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1187 | || S_ISLNK(inode->i_mode))) | |
1188 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce TM |
1189 | if (!nfs_have_delegation(inode, FMODE_READ) || |
1190 | (nfsi->cache_validity & NFS_INO_REVAL_FORCED)) | |
55296809 | 1191 | nfsi->cache_validity |= invalid; |
412c77ce | 1192 | nfsi->cache_validity &= ~NFS_INO_REVAL_FORCED; |
1da177e4 LT |
1193 | |
1194 | return 0; | |
1195 | out_changed: | |
1196 | /* | |
1197 | * Big trouble! The inode has become a different object. | |
1198 | */ | |
1da177e4 | 1199 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
3110ff80 | 1200 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
b37b03b7 | 1201 | out_err: |
1da177e4 LT |
1202 | /* |
1203 | * No need to worry about unhashing the dentry, as the | |
1204 | * lookup validation will know that the inode is bad. | |
1205 | * (But we fall through to invalidate the caches.) | |
1206 | */ | |
1207 | nfs_invalidate_inode(inode); | |
1da177e4 | 1208 | return -ESTALE; |
325cfed9 CL |
1209 | |
1210 | out_fileid: | |
1211 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1212 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
54ceac45 | 1213 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
325cfed9 CL |
1214 | (long long)nfsi->fileid, (long long)fattr->fileid); |
1215 | goto out_err; | |
1da177e4 LT |
1216 | } |
1217 | ||
55a97593 | 1218 | |
1da177e4 LT |
1219 | #ifdef CONFIG_NFS_V4 |
1220 | ||
1da177e4 LT |
1221 | /* |
1222 | * Clean out any remaining NFSv4 state that might be left over due | |
1223 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1224 | * nfs_open(). | |
1225 | */ | |
f7b422b1 | 1226 | void nfs4_clear_inode(struct inode *inode) |
1da177e4 | 1227 | { |
1da177e4 | 1228 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1229 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1230 | /* First call standard NFS clear_inode() code */ |
1231 | nfs_clear_inode(inode); | |
1da177e4 | 1232 | } |
1da177e4 LT |
1233 | #endif |
1234 | ||
f7b422b1 | 1235 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1236 | { |
1237 | struct nfs_inode *nfsi; | |
e94b1766 | 1238 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1239 | if (!nfsi) |
1240 | return NULL; | |
55296809 CL |
1241 | nfsi->flags = 0UL; |
1242 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1243 | #ifdef CONFIG_NFS_V3_ACL |
1244 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1245 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1246 | #endif | |
e50a1c2e BF |
1247 | #ifdef CONFIG_NFS_V4 |
1248 | nfsi->nfs4_acl = NULL; | |
1249 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1250 | return &nfsi->vfs_inode; |
1251 | } | |
1252 | ||
f7b422b1 | 1253 | void nfs_destroy_inode(struct inode *inode) |
1da177e4 LT |
1254 | { |
1255 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
1256 | } | |
1257 | ||
d75d5414 AM |
1258 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1259 | { | |
1260 | #ifdef CONFIG_NFS_V4 | |
1261 | INIT_LIST_HEAD(&nfsi->open_states); | |
1262 | nfsi->delegation = NULL; | |
1263 | nfsi->delegation_state = 0; | |
1264 | init_rwsem(&nfsi->rwsem); | |
1265 | #endif | |
1266 | } | |
f7b422b1 | 1267 | |
51cc5068 | 1268 | static void init_once(void *foo) |
1da177e4 LT |
1269 | { |
1270 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1271 | ||
a35afb83 | 1272 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1273 | INIT_LIST_HEAD(&nfsi->open_files); |
1274 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1275 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
1276 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
a35afb83 CL |
1277 | nfsi->ncommit = 0; |
1278 | nfsi->npages = 0; | |
565277f6 TM |
1279 | atomic_set(&nfsi->silly_count, 1); |
1280 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1281 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1282 | nfs4_init_once(nfsi); |
1da177e4 | 1283 | } |
20c2df83 | 1284 | |
f7b422b1 | 1285 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1286 | { |
1287 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1288 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1289 | 0, (SLAB_RECLAIM_ACCOUNT| |
1290 | SLAB_MEM_SPREAD), | |
20c2df83 | 1291 | init_once); |
1da177e4 LT |
1292 | if (nfs_inode_cachep == NULL) |
1293 | return -ENOMEM; | |
1294 | ||
1295 | return 0; | |
1296 | } | |
1297 | ||
266bee88 | 1298 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1299 | { |
1a1d92c1 | 1300 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1301 | } |
1302 | ||
5746006f TM |
1303 | struct workqueue_struct *nfsiod_workqueue; |
1304 | ||
1305 | /* | |
1306 | * start up the nfsiod workqueue | |
1307 | */ | |
1308 | static int nfsiod_start(void) | |
1309 | { | |
1310 | struct workqueue_struct *wq; | |
1311 | dprintk("RPC: creating workqueue nfsiod\n"); | |
1312 | wq = create_singlethread_workqueue("nfsiod"); | |
1313 | if (wq == NULL) | |
1314 | return -ENOMEM; | |
1315 | nfsiod_workqueue = wq; | |
1316 | return 0; | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * Destroy the nfsiod workqueue | |
1321 | */ | |
1322 | static void nfsiod_stop(void) | |
1323 | { | |
1324 | struct workqueue_struct *wq; | |
1325 | ||
1326 | wq = nfsiod_workqueue; | |
1327 | if (wq == NULL) | |
1328 | return; | |
1329 | nfsiod_workqueue = NULL; | |
1330 | destroy_workqueue(wq); | |
1331 | } | |
1332 | ||
1da177e4 LT |
1333 | /* |
1334 | * Initialize NFS | |
1335 | */ | |
1336 | static int __init init_nfs_fs(void) | |
1337 | { | |
1338 | int err; | |
1339 | ||
5746006f TM |
1340 | err = nfsiod_start(); |
1341 | if (err) | |
1342 | goto out6; | |
1343 | ||
6aaca566 DH |
1344 | err = nfs_fs_proc_init(); |
1345 | if (err) | |
1346 | goto out5; | |
1347 | ||
1da177e4 LT |
1348 | err = nfs_init_nfspagecache(); |
1349 | if (err) | |
1350 | goto out4; | |
1351 | ||
1352 | err = nfs_init_inodecache(); | |
1353 | if (err) | |
1354 | goto out3; | |
1355 | ||
1356 | err = nfs_init_readpagecache(); | |
1357 | if (err) | |
1358 | goto out2; | |
1359 | ||
1360 | err = nfs_init_writepagecache(); | |
1361 | if (err) | |
1362 | goto out1; | |
1363 | ||
1da177e4 LT |
1364 | err = nfs_init_directcache(); |
1365 | if (err) | |
1366 | goto out0; | |
1da177e4 LT |
1367 | |
1368 | #ifdef CONFIG_PROC_FS | |
1369 | rpc_proc_register(&nfs_rpcstat); | |
1370 | #endif | |
f7b422b1 | 1371 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1372 | goto out; |
1373 | return 0; | |
1374 | out: | |
1375 | #ifdef CONFIG_PROC_FS | |
1376 | rpc_proc_unregister("nfs"); | |
1377 | #endif | |
1da177e4 | 1378 | nfs_destroy_directcache(); |
6b59a754 | 1379 | out0: |
6b59a754 | 1380 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1381 | out1: |
1382 | nfs_destroy_readpagecache(); | |
1383 | out2: | |
1384 | nfs_destroy_inodecache(); | |
1385 | out3: | |
1386 | nfs_destroy_nfspagecache(); | |
1387 | out4: | |
6aaca566 DH |
1388 | nfs_fs_proc_exit(); |
1389 | out5: | |
5746006f TM |
1390 | nfsiod_stop(); |
1391 | out6: | |
1da177e4 LT |
1392 | return err; |
1393 | } | |
1394 | ||
1395 | static void __exit exit_nfs_fs(void) | |
1396 | { | |
1da177e4 | 1397 | nfs_destroy_directcache(); |
1da177e4 LT |
1398 | nfs_destroy_writepagecache(); |
1399 | nfs_destroy_readpagecache(); | |
1400 | nfs_destroy_inodecache(); | |
1401 | nfs_destroy_nfspagecache(); | |
1402 | #ifdef CONFIG_PROC_FS | |
1403 | rpc_proc_unregister("nfs"); | |
1404 | #endif | |
f7b422b1 | 1405 | unregister_nfs_fs(); |
6aaca566 | 1406 | nfs_fs_proc_exit(); |
5746006f | 1407 | nfsiod_stop(); |
1da177e4 LT |
1408 | } |
1409 | ||
1410 | /* Not quite true; I just maintain it */ | |
1411 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1412 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1413 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1414 | |
1415 | module_init(init_nfs_fs) | |
1416 | module_exit(exit_nfs_fs) |