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" |
8ec442ae | 49 | #include "fscache.h" |
1da177e4 LT |
50 | |
51 | #define NFSDBG_FACILITY NFSDBG_VFS | |
1da177e4 | 52 | |
f43bf0be TM |
53 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
54 | ||
55 | /* Default is to see 64-bit inode numbers */ | |
56 | static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; | |
57 | ||
1da177e4 | 58 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 59 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 60 | |
e18b890b | 61 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 62 | |
1da177e4 LT |
63 | static inline unsigned long |
64 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
65 | { | |
66 | return nfs_fileid_to_ino_t(fattr->fileid); | |
67 | } | |
68 | ||
72cb77f4 TM |
69 | /** |
70 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
71 | * @word: long word containing the bit lock | |
72 | */ | |
73 | int nfs_wait_bit_killable(void *word) | |
74 | { | |
75 | if (fatal_signal_pending(current)) | |
76 | return -ERESTARTSYS; | |
77 | schedule(); | |
78 | return 0; | |
79 | } | |
80 | ||
f43bf0be TM |
81 | /** |
82 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
83 | * @fileid: 64-bit fileid | |
84 | * | |
85 | * This function returns a 32-bit inode number if the boot parameter | |
86 | * nfs.enable_ino64 is zero. | |
87 | */ | |
88 | u64 nfs_compat_user_ino64(u64 fileid) | |
89 | { | |
90 | int ino; | |
91 | ||
92 | if (enable_ino64) | |
93 | return fileid; | |
94 | ino = fileid; | |
95 | if (sizeof(ino) < sizeof(fileid)) | |
96 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
97 | return ino; | |
98 | } | |
99 | ||
f7b422b1 | 100 | int nfs_write_inode(struct inode *inode, int sync) |
1da177e4 | 101 | { |
1da177e4 LT |
102 | int ret; |
103 | ||
d30c8348 TM |
104 | if (sync) { |
105 | ret = filemap_fdatawait(inode->i_mapping); | |
106 | if (ret == 0) | |
107 | ret = nfs_commit_inode(inode, FLUSH_SYNC); | |
108 | } else | |
109 | ret = nfs_commit_inode(inode, 0); | |
110 | if (ret >= 0) | |
111 | return 0; | |
112 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); | |
113 | return ret; | |
1da177e4 LT |
114 | } |
115 | ||
f7b422b1 | 116 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 117 | { |
da6d503a TM |
118 | /* |
119 | * The following should never happen... | |
120 | */ | |
121 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 122 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 123 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 124 | nfs_access_zap_cache(inode); |
ef79c097 | 125 | nfs_fscache_release_inode_cookie(inode); |
1da177e4 LT |
126 | } |
127 | ||
29884df0 TM |
128 | /** |
129 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
130 | */ | |
131 | int nfs_sync_mapping(struct address_space *mapping) | |
132 | { | |
133 | int ret; | |
134 | ||
135 | if (mapping->nrpages == 0) | |
136 | return 0; | |
137 | unmap_mapping_range(mapping, 0, 0, 0); | |
28fd1298 | 138 | ret = filemap_write_and_wait(mapping); |
29884df0 TM |
139 | if (ret != 0) |
140 | goto out; | |
141 | ret = nfs_wb_all(mapping->host); | |
142 | out: | |
143 | return ret; | |
144 | } | |
145 | ||
1da177e4 LT |
146 | /* |
147 | * Invalidate the local caches | |
148 | */ | |
b37b03b7 | 149 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
150 | { |
151 | struct nfs_inode *nfsi = NFS_I(inode); | |
152 | int mode = inode->i_mode; | |
153 | ||
91d5b470 CL |
154 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
155 | ||
c7c20973 TM |
156 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
157 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 LT |
158 | |
159 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
160 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 161 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 162 | else |
55296809 | 163 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 164 | } |
dc59250c | 165 | |
b37b03b7 TM |
166 | void nfs_zap_caches(struct inode *inode) |
167 | { | |
168 | spin_lock(&inode->i_lock); | |
169 | nfs_zap_caches_locked(inode); | |
dc59250c | 170 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
171 | } |
172 | ||
cd9ae2b6 TM |
173 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
174 | { | |
175 | if (mapping->nrpages != 0) { | |
176 | spin_lock(&inode->i_lock); | |
177 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
178 | spin_unlock(&inode->i_lock); | |
179 | } | |
180 | } | |
181 | ||
f41f7418 | 182 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
183 | { |
184 | void (*clear_acl_cache)(struct inode *); | |
185 | ||
186 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
187 | if (clear_acl_cache != NULL) | |
188 | clear_acl_cache(inode); | |
dc59250c | 189 | spin_lock(&inode->i_lock); |
55296809 | 190 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 191 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
192 | } |
193 | ||
c4812998 TM |
194 | void nfs_invalidate_atime(struct inode *inode) |
195 | { | |
196 | spin_lock(&inode->i_lock); | |
197 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
198 | spin_unlock(&inode->i_lock); | |
199 | } | |
200 | ||
1da177e4 | 201 | /* |
b37b03b7 TM |
202 | * Invalidate, but do not unhash, the inode. |
203 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 204 | */ |
b37b03b7 | 205 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 206 | { |
3a10c30a | 207 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 208 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
209 | } |
210 | ||
211 | struct nfs_find_desc { | |
212 | struct nfs_fh *fh; | |
213 | struct nfs_fattr *fattr; | |
214 | }; | |
215 | ||
216 | /* | |
217 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
218 | * this, and re-exported directories (also seen in NFSv2) | |
219 | * we are forced to allow 2 different inodes to have the same | |
220 | * i_ino. | |
221 | */ | |
222 | static int | |
223 | nfs_find_actor(struct inode *inode, void *opaque) | |
224 | { | |
225 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
226 | struct nfs_fh *fh = desc->fh; | |
227 | struct nfs_fattr *fattr = desc->fattr; | |
228 | ||
229 | if (NFS_FILEID(inode) != fattr->fileid) | |
230 | return 0; | |
231 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
232 | return 0; | |
233 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
234 | return 0; | |
235 | return 1; | |
236 | } | |
237 | ||
238 | static int | |
239 | nfs_init_locked(struct inode *inode, void *opaque) | |
240 | { | |
241 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
242 | struct nfs_fattr *fattr = desc->fattr; | |
243 | ||
99fadcd7 | 244 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
245 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
246 | return 0; | |
247 | } | |
248 | ||
249 | /* Don't use READDIRPLUS on directories that we believe are too large */ | |
250 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) | |
251 | ||
252 | /* | |
253 | * This is our front-end to iget that looks up inodes by file handle | |
254 | * instead of inode number. | |
255 | */ | |
256 | struct inode * | |
257 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
258 | { | |
259 | struct nfs_find_desc desc = { | |
260 | .fh = fh, | |
261 | .fattr = fattr | |
262 | }; | |
03f28e3a | 263 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
264 | unsigned long hash; |
265 | ||
9e6e70f8 | 266 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) |
1da177e4 | 267 | goto out_no_inode; |
9e6e70f8 | 268 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 269 | goto out_no_inode; |
1da177e4 LT |
270 | |
271 | hash = nfs_fattr_to_ino_t(fattr); | |
272 | ||
03f28e3a TM |
273 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
274 | if (inode == NULL) { | |
275 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 276 | goto out_no_inode; |
03f28e3a | 277 | } |
1da177e4 LT |
278 | |
279 | if (inode->i_state & I_NEW) { | |
280 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 281 | unsigned long now = jiffies; |
1da177e4 LT |
282 | |
283 | /* We set i_ino for the few things that still rely on it, | |
284 | * such as stat(2) */ | |
285 | inode->i_ino = hash; | |
286 | ||
287 | /* We can't support update_atime(), since the server will reset it */ | |
288 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
289 | inode->i_mode = fattr->mode; | |
290 | /* Why so? Because we want revalidate for devices/FIFOs, and | |
291 | * that's precisely what we have in nfs_file_inode_operations. | |
292 | */ | |
8fa5c000 | 293 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 LT |
294 | if (S_ISREG(inode->i_mode)) { |
295 | inode->i_fop = &nfs_file_operations; | |
296 | inode->i_data.a_ops = &nfs_file_aops; | |
297 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
298 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 299 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 LT |
300 | inode->i_fop = &nfs_dir_operations; |
301 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) | |
302 | && fattr->size <= NFS_LIMIT_READDIRPLUS) | |
3a10c30a | 303 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
55a97593 | 304 | /* Deal with crossing mountpoints */ |
9e6e70f8 TM |
305 | if ((fattr->valid & NFS_ATTR_FATTR_FSID) |
306 | && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { | |
6b97fd3d MN |
307 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
308 | inode->i_op = &nfs_referral_inode_operations; | |
309 | else | |
310 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 311 | inode->i_fop = NULL; |
c37dcd33 | 312 | set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags); |
55a97593 | 313 | } |
1da177e4 LT |
314 | } else if (S_ISLNK(inode->i_mode)) |
315 | inode->i_op = &nfs_symlink_inode_operations; | |
316 | else | |
317 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
318 | ||
9e6e70f8 TM |
319 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
320 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
321 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
322 | nfsi->change_attr = 0; | |
323 | inode->i_size = 0; | |
324 | inode->i_nlink = 0; | |
325 | inode->i_uid = -2; | |
326 | inode->i_gid = -2; | |
327 | inode->i_blocks = 0; | |
328 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
329 | ||
33801147 | 330 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 331 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
332 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
333 | inode->i_atime = fattr->atime; | |
334 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
335 | inode->i_mtime = fattr->mtime; | |
336 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
337 | inode->i_ctime = fattr->ctime; | |
338 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
1da177e4 | 339 | nfsi->change_attr = fattr->change_attr; |
9e6e70f8 TM |
340 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
341 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
342 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) | |
343 | inode->i_nlink = fattr->nlink; | |
344 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) | |
345 | inode->i_uid = fattr->uid; | |
346 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) | |
347 | inode->i_gid = fattr->gid; | |
348 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) | |
349 | inode->i_blocks = fattr->du.nfs2.blocks; | |
350 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
351 | /* |
352 | * report the blocks in 512byte units | |
353 | */ | |
354 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
355 | } |
356 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 357 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 358 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 359 | |
ef79c097 DH |
360 | nfs_fscache_init_inode_cookie(inode); |
361 | ||
1da177e4 LT |
362 | unlock_new_inode(inode); |
363 | } else | |
364 | nfs_refresh_inode(inode, fattr); | |
365 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
366 | inode->i_sb->s_id, | |
367 | (long long)NFS_FILEID(inode), | |
368 | atomic_read(&inode->i_count)); | |
369 | ||
370 | out: | |
371 | return inode; | |
372 | ||
373 | out_no_inode: | |
03f28e3a | 374 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
375 | goto out; |
376 | } | |
377 | ||
659bfcd6 | 378 | #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 |
379 | |
380 | int | |
381 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
382 | { | |
383 | struct inode *inode = dentry->d_inode; | |
384 | struct nfs_fattr fattr; | |
385 | int error; | |
386 | ||
91d5b470 CL |
387 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
388 | ||
188b95dd JL |
389 | /* skip mode change if it's just for clearing setuid/setgid */ |
390 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
391 | attr->ia_valid &= ~ATTR_MODE; | |
392 | ||
1da177e4 LT |
393 | if (attr->ia_valid & ATTR_SIZE) { |
394 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
395 | attr->ia_valid &= ~ATTR_SIZE; | |
396 | } | |
397 | ||
398 | /* Optimization: if the end result is no change, don't RPC */ | |
399 | attr->ia_valid &= NFS_VALID_ATTRS; | |
659bfcd6 | 400 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
1da177e4 LT |
401 | return 0; |
402 | ||
755c1e20 | 403 | /* Write all dirty data */ |
e1552e19 TM |
404 | if (S_ISREG(inode->i_mode)) { |
405 | filemap_write_and_wait(inode->i_mapping); | |
406 | nfs_wb_all(inode); | |
407 | } | |
642ac549 TM |
408 | /* |
409 | * Return any delegations if we're going to change ACLs | |
410 | */ | |
411 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
412 | nfs_inode_return_delegation(inode); | |
1da177e4 | 413 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
65e4308d | 414 | if (error == 0) |
1da177e4 | 415 | nfs_refresh_inode(inode, &fattr); |
65e4308d TM |
416 | return error; |
417 | } | |
418 | ||
a3d01454 TM |
419 | /** |
420 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
421 | * @inode: inode of the file used | |
422 | * @offset: file offset to start truncating | |
423 | * | |
424 | * This is a copy of the common vmtruncate, but with the locking | |
425 | * corrected to take into account the fact that NFS requires | |
426 | * inode->i_size to be updated under the inode->i_lock. | |
427 | */ | |
428 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
429 | { | |
430 | if (i_size_read(inode) < offset) { | |
431 | unsigned long limit; | |
432 | ||
433 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; | |
434 | if (limit != RLIM_INFINITY && offset > limit) | |
435 | goto out_sig; | |
436 | if (offset > inode->i_sb->s_maxbytes) | |
437 | goto out_big; | |
438 | spin_lock(&inode->i_lock); | |
439 | i_size_write(inode, offset); | |
440 | spin_unlock(&inode->i_lock); | |
441 | } else { | |
442 | struct address_space *mapping = inode->i_mapping; | |
443 | ||
444 | /* | |
445 | * truncation of in-use swapfiles is disallowed - it would | |
446 | * cause subsequent swapout to scribble on the now-freed | |
447 | * blocks. | |
448 | */ | |
449 | if (IS_SWAPFILE(inode)) | |
450 | return -ETXTBSY; | |
451 | spin_lock(&inode->i_lock); | |
452 | i_size_write(inode, offset); | |
453 | spin_unlock(&inode->i_lock); | |
454 | ||
455 | /* | |
456 | * unmap_mapping_range is called twice, first simply for | |
457 | * efficiency so that truncate_inode_pages does fewer | |
458 | * single-page unmaps. However after this first call, and | |
459 | * before truncate_inode_pages finishes, it is possible for | |
460 | * private pages to be COWed, which remain after | |
461 | * truncate_inode_pages finishes, hence the second | |
462 | * unmap_mapping_range call must be made for correctness. | |
463 | */ | |
464 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); | |
465 | truncate_inode_pages(mapping, offset); | |
466 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); | |
467 | } | |
468 | return 0; | |
469 | out_sig: | |
470 | send_sig(SIGXFSZ, current, 0); | |
471 | out_big: | |
472 | return -EFBIG; | |
473 | } | |
474 | ||
65e4308d TM |
475 | /** |
476 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
477 | * @inode: pointer to struct inode | |
478 | * @attr: pointer to struct iattr | |
479 | * | |
480 | * Note: we do this in the *proc.c in order to ensure that | |
481 | * it works for things like exclusive creates too. | |
482 | */ | |
483 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
484 | { | |
485 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 486 | spin_lock(&inode->i_lock); |
1da177e4 | 487 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
488 | int mode = attr->ia_mode & S_IALLUGO; |
489 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
490 | inode->i_mode = mode; |
491 | } | |
492 | if ((attr->ia_valid & ATTR_UID) != 0) | |
493 | inode->i_uid = attr->ia_uid; | |
494 | if ((attr->ia_valid & ATTR_GID) != 0) | |
495 | inode->i_gid = attr->ia_gid; | |
55296809 | 496 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 497 | spin_unlock(&inode->i_lock); |
65e4308d TM |
498 | } |
499 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 500 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 501 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 502 | } |
1da177e4 LT |
503 | } |
504 | ||
1da177e4 LT |
505 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
506 | { | |
507 | struct inode *inode = dentry->d_inode; | |
55296809 | 508 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
509 | int err; |
510 | ||
28c494c5 CL |
511 | /* |
512 | * Flush out writes to the server in order to update c/mtime. | |
513 | * | |
514 | * Hold the i_mutex to suspend application writes temporarily; | |
515 | * this prevents long-running writing applications from blocking | |
516 | * nfs_wb_nocommit. | |
517 | */ | |
518 | if (S_ISREG(inode->i_mode)) { | |
519 | mutex_lock(&inode->i_mutex); | |
ed90ef51 | 520 | nfs_wb_nocommit(inode); |
28c494c5 CL |
521 | mutex_unlock(&inode->i_mutex); |
522 | } | |
fc33a7bb CH |
523 | |
524 | /* | |
525 | * We may force a getattr if the user cares about atime. | |
526 | * | |
527 | * Note that we only have to check the vfsmount flags here: | |
528 | * - NFS always sets S_NOATIME by so checking it would give a | |
529 | * bogus result | |
530 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
531 | * no point in checking those. | |
532 | */ | |
533 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
534 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 535 | need_atime = 0; |
fc33a7bb | 536 | |
1da177e4 LT |
537 | if (need_atime) |
538 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
539 | else | |
540 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 541 | if (!err) { |
1da177e4 | 542 | generic_fillattr(inode, stat); |
f43bf0be | 543 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 544 | } |
1da177e4 LT |
545 | return err; |
546 | } | |
547 | ||
7fe5c398 TM |
548 | /** |
549 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
550 | * @ctx: pointer to context | |
551 | * @is_sync: is this a synchronous close | |
552 | * | |
553 | * always ensure that the attributes are up to date if we're mounted | |
554 | * with close-to-open semantics | |
555 | */ | |
556 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
557 | { | |
558 | struct inode *inode; | |
559 | struct nfs_server *server; | |
560 | ||
561 | if (!(ctx->mode & FMODE_WRITE)) | |
562 | return; | |
563 | if (!is_sync) | |
564 | return; | |
565 | inode = ctx->path.dentry->d_inode; | |
566 | if (!list_empty(&NFS_I(inode)->open_files)) | |
567 | return; | |
568 | server = NFS_SERVER(inode); | |
569 | if (server->flags & NFS_MOUNT_NOCTO) | |
570 | return; | |
571 | nfs_revalidate_inode(server, inode); | |
572 | } | |
573 | ||
b92dccf6 | 574 | static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred) |
1da177e4 LT |
575 | { |
576 | struct nfs_open_context *ctx; | |
577 | ||
f52720ca | 578 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
1da177e4 | 579 | if (ctx != NULL) { |
88be9f99 TM |
580 | ctx->path.dentry = dget(dentry); |
581 | ctx->path.mnt = mntget(mnt); | |
1da177e4 LT |
582 | ctx->cred = get_rpccred(cred); |
583 | ctx->state = NULL; | |
584 | ctx->lockowner = current->files; | |
66d3aac0 | 585 | ctx->flags = 0; |
1da177e4 | 586 | ctx->error = 0; |
00a92642 | 587 | ctx->dir_cookie = 0; |
5e11934d | 588 | atomic_set(&ctx->count, 1); |
1da177e4 LT |
589 | } |
590 | return ctx; | |
591 | } | |
592 | ||
593 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
594 | { | |
595 | if (ctx != NULL) | |
5e11934d | 596 | atomic_inc(&ctx->count); |
1da177e4 LT |
597 | return ctx; |
598 | } | |
599 | ||
7fe5c398 | 600 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 601 | { |
7fe5c398 | 602 | struct inode *inode = ctx->path.dentry->d_inode; |
3bec63db | 603 | |
5e11934d TM |
604 | if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock)) |
605 | return; | |
606 | list_del(&ctx->list); | |
607 | spin_unlock(&inode->i_lock); | |
7fe5c398 | 608 | NFS_PROTO(inode)->close_context(ctx, is_sync); |
3bec63db TM |
609 | if (ctx->cred != NULL) |
610 | put_rpccred(ctx->cred); | |
31f31db1 | 611 | path_put(&ctx->path); |
3bec63db TM |
612 | kfree(ctx); |
613 | } | |
614 | ||
a49c3c77 TM |
615 | void put_nfs_open_context(struct nfs_open_context *ctx) |
616 | { | |
617 | __put_nfs_open_context(ctx, 0); | |
618 | } | |
619 | ||
620 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) | |
621 | { | |
622 | __put_nfs_open_context(ctx, 1); | |
623 | } | |
624 | ||
1da177e4 LT |
625 | /* |
626 | * Ensure that mmap has a recent RPC credential for use when writing out | |
627 | * shared pages | |
628 | */ | |
b92dccf6 | 629 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 630 | { |
01cce933 | 631 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
632 | struct nfs_inode *nfsi = NFS_I(inode); |
633 | ||
634 | filp->private_data = get_nfs_open_context(ctx); | |
635 | spin_lock(&inode->i_lock); | |
636 | list_add(&ctx->list, &nfsi->open_files); | |
637 | spin_unlock(&inode->i_lock); | |
638 | } | |
639 | ||
d530838b TM |
640 | /* |
641 | * Given an inode, search for an open context with the desired characteristics | |
642 | */ | |
dc0b027d | 643 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
644 | { |
645 | struct nfs_inode *nfsi = NFS_I(inode); | |
646 | struct nfs_open_context *pos, *ctx = NULL; | |
647 | ||
648 | spin_lock(&inode->i_lock); | |
649 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
650 | if (cred != NULL && pos->cred != cred) |
651 | continue; | |
1da177e4 LT |
652 | if ((pos->mode & mode) == mode) { |
653 | ctx = get_nfs_open_context(pos); | |
654 | break; | |
655 | } | |
656 | } | |
657 | spin_unlock(&inode->i_lock); | |
658 | return ctx; | |
659 | } | |
660 | ||
b92dccf6 | 661 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 662 | { |
01cce933 | 663 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 664 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
665 | |
666 | if (ctx) { | |
667 | filp->private_data = NULL; | |
668 | spin_lock(&inode->i_lock); | |
669 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
670 | spin_unlock(&inode->i_lock); | |
a49c3c77 | 671 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
672 | } |
673 | } | |
674 | ||
675 | /* | |
676 | * These allocate and release file read/write context information. | |
677 | */ | |
678 | int nfs_open(struct inode *inode, struct file *filp) | |
679 | { | |
680 | struct nfs_open_context *ctx; | |
681 | struct rpc_cred *cred; | |
682 | ||
98a8e323 | 683 | cred = rpc_lookup_cred(); |
1da177e4 LT |
684 | if (IS_ERR(cred)) |
685 | return PTR_ERR(cred); | |
01cce933 | 686 | ctx = alloc_nfs_open_context(filp->f_path.mnt, filp->f_path.dentry, cred); |
1da177e4 LT |
687 | put_rpccred(cred); |
688 | if (ctx == NULL) | |
689 | return -ENOMEM; | |
690 | ctx->mode = filp->f_mode; | |
691 | nfs_file_set_open_context(filp, ctx); | |
692 | put_nfs_open_context(ctx); | |
ef79c097 | 693 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
694 | return 0; |
695 | } | |
696 | ||
697 | int nfs_release(struct inode *inode, struct file *filp) | |
698 | { | |
1da177e4 LT |
699 | nfs_file_clear_open_context(filp); |
700 | return 0; | |
701 | } | |
702 | ||
703 | /* | |
704 | * This function is called whenever some part of NFS notices that | |
705 | * the cached attributes have to be refreshed. | |
706 | */ | |
707 | int | |
708 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
709 | { | |
710 | int status = -ESTALE; | |
711 | struct nfs_fattr fattr; | |
712 | struct nfs_inode *nfsi = NFS_I(inode); | |
1da177e4 LT |
713 | |
714 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
715 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
716 | ||
85233a7a | 717 | if (is_bad_inode(inode)) |
691beb13 | 718 | goto out; |
1da177e4 | 719 | if (NFS_STALE(inode)) |
412d582e | 720 | goto out; |
7fdc49c4 | 721 | |
691beb13 | 722 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
1da177e4 LT |
723 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
724 | if (status != 0) { | |
725 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
726 | inode->i_sb->s_id, | |
727 | (long long)NFS_FILEID(inode), status); | |
728 | if (status == -ESTALE) { | |
729 | nfs_zap_caches(inode); | |
730 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 731 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
732 | } |
733 | goto out; | |
734 | } | |
735 | ||
4dc05efb | 736 | status = nfs_refresh_inode(inode, &fattr); |
1da177e4 LT |
737 | if (status) { |
738 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
739 | inode->i_sb->s_id, | |
740 | (long long)NFS_FILEID(inode), status); | |
741 | goto out; | |
742 | } | |
55296809 | 743 | |
24aa1fe6 | 744 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 745 | nfs_zap_acl_cache(inode); |
55296809 | 746 | |
1da177e4 LT |
747 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
748 | inode->i_sb->s_id, | |
749 | (long long)NFS_FILEID(inode)); | |
750 | ||
412d582e | 751 | out: |
1da177e4 LT |
752 | return status; |
753 | } | |
754 | ||
755 | int nfs_attribute_timeout(struct inode *inode) | |
756 | { | |
757 | struct nfs_inode *nfsi = NFS_I(inode); | |
758 | ||
759 | if (nfs_have_delegation(inode, FMODE_READ)) | |
760 | return 0; | |
64672d55 | 761 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
1da177e4 LT |
762 | } |
763 | ||
764 | /** | |
765 | * nfs_revalidate_inode - Revalidate the inode attributes | |
766 | * @server - pointer to nfs_server struct | |
767 | * @inode - pointer to inode struct | |
768 | * | |
769 | * Updates inode attribute information by retrieving the data from the server. | |
770 | */ | |
771 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
772 | { | |
44b11874 | 773 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
1da177e4 LT |
774 | && !nfs_attribute_timeout(inode)) |
775 | return NFS_STALE(inode) ? -ESTALE : 0; | |
776 | return __nfs_revalidate_inode(server, inode); | |
777 | } | |
778 | ||
717d44e8 TM |
779 | static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
780 | { | |
781 | struct nfs_inode *nfsi = NFS_I(inode); | |
782 | ||
783 | if (mapping->nrpages != 0) { | |
784 | int ret = invalidate_inode_pages2(mapping); | |
785 | if (ret < 0) | |
786 | return ret; | |
787 | } | |
788 | spin_lock(&inode->i_lock); | |
789 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 790 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 791 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
792 | spin_unlock(&inode->i_lock); |
793 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 794 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
795 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
796 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
797 | return 0; | |
798 | } | |
799 | ||
800 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) | |
801 | { | |
802 | int ret = 0; | |
803 | ||
804 | mutex_lock(&inode->i_mutex); | |
805 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) { | |
806 | ret = nfs_sync_mapping(mapping); | |
807 | if (ret == 0) | |
808 | ret = nfs_invalidate_mapping_nolock(inode, mapping); | |
809 | } | |
810 | mutex_unlock(&inode->i_mutex); | |
811 | return ret; | |
812 | } | |
813 | ||
7d52e862 | 814 | /** |
717d44e8 | 815 | * nfs_revalidate_mapping_nolock - Revalidate the pagecache |
7d52e862 TM |
816 | * @inode - pointer to host inode |
817 | * @mapping - pointer to mapping | |
818 | */ | |
717d44e8 | 819 | int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
7d52e862 TM |
820 | { |
821 | struct nfs_inode *nfsi = NFS_I(inode); | |
44b11874 TM |
822 | int ret = 0; |
823 | ||
44b11874 | 824 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
717d44e8 | 825 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { |
44b11874 | 826 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
717d44e8 TM |
827 | if (ret < 0) |
828 | goto out; | |
829 | } | |
830 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
831 | ret = nfs_invalidate_mapping_nolock(inode, mapping); | |
832 | out: | |
833 | return ret; | |
834 | } | |
7d52e862 | 835 | |
717d44e8 TM |
836 | /** |
837 | * nfs_revalidate_mapping - Revalidate the pagecache | |
838 | * @inode - pointer to host inode | |
839 | * @mapping - pointer to mapping | |
840 | * | |
841 | * This version of the function will take the inode->i_mutex and attempt to | |
842 | * flush out all dirty data if it needs to invalidate the page cache. | |
843 | */ | |
844 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
845 | { | |
846 | struct nfs_inode *nfsi = NFS_I(inode); | |
847 | int ret = 0; | |
dc59250c | 848 | |
717d44e8 TM |
849 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
850 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { | |
851 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
852 | if (ret < 0) | |
853 | goto out; | |
7d52e862 | 854 | } |
717d44e8 TM |
855 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
856 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 857 | out: |
44b11874 | 858 | return ret; |
7d52e862 TM |
859 | } |
860 | ||
a895b4a1 TM |
861 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
862 | { | |
863 | struct nfs_inode *nfsi = NFS_I(inode); | |
864 | ||
9e6e70f8 TM |
865 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
866 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
867 | && nfsi->change_attr == fattr->pre_change_attr) { | |
70ca8852 TM |
868 | nfsi->change_attr = fattr->change_attr; |
869 | if (S_ISDIR(inode->i_mode)) | |
870 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
871 | } | |
a895b4a1 | 872 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
873 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
874 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
875 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) | |
a895b4a1 | 876 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
9e6e70f8 TM |
877 | |
878 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
879 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
880 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
a895b4a1 | 881 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
e323ea46 TM |
882 | if (S_ISDIR(inode->i_mode)) |
883 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
a895b4a1 | 884 | } |
9e6e70f8 TM |
885 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
886 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
887 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
888 | && nfsi->npages == 0) | |
889 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
a895b4a1 TM |
890 | } |
891 | ||
1da177e4 | 892 | /** |
33801147 | 893 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
894 | * @inode - pointer to inode |
895 | * @fattr - updated attributes | |
896 | * | |
897 | * Verifies the attribute cache. If we have just changed the attributes, | |
898 | * so that fattr carries weak cache consistency data, then it may | |
899 | * also update the ctime/mtime/change_attribute. | |
900 | */ | |
33801147 | 901 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
902 | { |
903 | struct nfs_inode *nfsi = NFS_I(inode); | |
904 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 905 | unsigned long invalid = 0; |
1da177e4 | 906 | |
dc59250c | 907 | |
ca62b9c3 | 908 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
909 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
910 | return -EIO; | |
911 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 912 | return -EIO; |
ca62b9c3 | 913 | |
9e6e70f8 | 914 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
f1bb0b92 | 915 | nfsi->change_attr != fattr->change_attr) |
2a3f5fd4 | 916 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 917 | |
1da177e4 | 918 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 919 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
2a3f5fd4 | 920 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
ca62b9c3 | 921 | |
9e6e70f8 TM |
922 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
923 | cur_size = i_size_read(inode); | |
924 | new_isize = nfs_size_to_loff_t(fattr->size); | |
925 | if (cur_size != new_isize && nfsi->npages == 0) | |
926 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
927 | } | |
1da177e4 LT |
928 | |
929 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
930 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
931 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
932 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
933 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
934 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 935 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
936 | |
937 | /* Has the link count changed? */ | |
9e6e70f8 | 938 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 939 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 940 | |
9e6e70f8 | 941 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
942 | invalid |= NFS_INO_INVALID_ATIME; |
943 | ||
944 | if (invalid != 0) | |
945 | nfsi->cache_validity |= invalid; | |
1da177e4 | 946 | |
33801147 | 947 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
948 | return 0; |
949 | } | |
950 | ||
a10ad176 | 951 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 952 | { |
9e6e70f8 TM |
953 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
954 | return 0; | |
a10ad176 TM |
955 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
956 | } | |
957 | ||
958 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
959 | { | |
9e6e70f8 TM |
960 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
961 | return 0; | |
a10ad176 TM |
962 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
963 | } | |
870a5be8 | 964 | |
ae05f269 | 965 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
966 | |
967 | static unsigned long nfs_read_attr_generation_counter(void) | |
968 | { | |
ae05f269 | 969 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
970 | } |
971 | ||
972 | unsigned long nfs_inc_attr_generation_counter(void) | |
973 | { | |
ae05f269 | 974 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
975 | } |
976 | ||
977 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
978 | { | |
979 | fattr->valid = 0; | |
980 | fattr->time_start = jiffies; | |
981 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
982 | } | |
983 | ||
a10ad176 TM |
984 | /** |
985 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
986 | * @inode - pointer to inode | |
987 | * @fattr - attributes | |
988 | * | |
989 | * Attempt to divine whether or not an RPC call reply carrying stale | |
990 | * attributes got scheduled after another call carrying updated ones. | |
991 | * | |
992 | * To do so, the function first assumes that a more recent ctime means | |
993 | * that the attributes in fattr are newer, however it also attempt to | |
994 | * catch the case where ctime either didn't change, or went backwards | |
995 | * (if someone reset the clock on the server) by looking at whether | |
996 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 997 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
998 | * |
999 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1000 | * more recent than the ones cached in the inode. | |
1001 | * | |
1002 | */ | |
1003 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1004 | { | |
1005 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1006 | ||
4704f0e2 | 1007 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1008 | nfs_ctime_need_update(inode, fattr) || |
1009 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1010 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1011 | } |
1012 | ||
1013 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1014 | { | |
1015 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1016 | return nfs_update_inode(inode, fattr); |
1017 | return nfs_check_inode_attributes(inode, fattr); | |
1018 | } | |
1019 | ||
33801147 TM |
1020 | /** |
1021 | * nfs_refresh_inode - try to update the inode attribute cache | |
1022 | * @inode - pointer to inode | |
1023 | * @fattr - updated attributes | |
1024 | * | |
1025 | * Check that an RPC call that returned attributes has not overlapped with | |
1026 | * other recent updates of the inode metadata, then decide whether it is | |
1027 | * safe to do a full update of the inode attributes, or whether just to | |
1028 | * call nfs_check_inode_attributes. | |
1029 | */ | |
1030 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1031 | { | |
33801147 TM |
1032 | int status; |
1033 | ||
1034 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1035 | return 0; | |
1036 | spin_lock(&inode->i_lock); | |
870a5be8 | 1037 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1038 | spin_unlock(&inode->i_lock); |
ef79c097 | 1039 | |
33801147 TM |
1040 | return status; |
1041 | } | |
1042 | ||
d65f557f TM |
1043 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1044 | { | |
1045 | struct nfs_inode *nfsi = NFS_I(inode); | |
1046 | ||
1047 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1048 | if (S_ISDIR(inode->i_mode)) | |
1049 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1050 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1051 | return 0; | |
1052 | return nfs_refresh_inode_locked(inode, fattr); | |
1053 | } | |
1054 | ||
decf491f TM |
1055 | /** |
1056 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1057 | * @inode - pointer to inode | |
1058 | * @fattr - updated attributes | |
1059 | * | |
1060 | * After an operation that has changed the inode metadata, mark the | |
1061 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1062 | * |
1063 | * NB: if the server didn't return any post op attributes, this | |
1064 | * function will force the retrieval of attributes before the next | |
1065 | * NFS request. Thus it should be used only for operations that | |
1066 | * are expected to change one or more attributes, to avoid | |
1067 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1068 | */ |
1069 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1070 | { | |
d65f557f | 1071 | int status; |
decf491f | 1072 | |
7668fdbe | 1073 | spin_lock(&inode->i_lock); |
d65f557f | 1074 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1075 | spin_unlock(&inode->i_lock); |
870a5be8 | 1076 | return status; |
decf491f TM |
1077 | } |
1078 | ||
70ca8852 TM |
1079 | /** |
1080 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1081 | * @inode - pointer to inode | |
1082 | * @fattr - updated attributes | |
1083 | * | |
1084 | * After an operation that has changed the inode metadata, mark the | |
1085 | * attribute cache as being invalid, then try to update it. Fake up | |
1086 | * weak cache consistency data, if none exist. | |
1087 | * | |
1088 | * This function is mainly designed to be used by the ->write_done() functions. | |
1089 | */ | |
1090 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1091 | { | |
d65f557f TM |
1092 | int status; |
1093 | ||
1094 | spin_lock(&inode->i_lock); | |
1095 | /* Don't do a WCC update if these attributes are already stale */ | |
1096 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1097 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1098 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1099 | | NFS_ATTR_FATTR_PRESIZE | |
1100 | | NFS_ATTR_FATTR_PREMTIME | |
1101 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1102 | goto out_noforce; |
1103 | } | |
9e6e70f8 TM |
1104 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1105 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
70ca8852 | 1106 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
9e6e70f8 | 1107 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1108 | } |
9e6e70f8 TM |
1109 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1110 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1111 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1112 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1113 | } | |
1114 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1115 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1116 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1117 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1118 | } | |
1119 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1120 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1121 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1122 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1123 | } |
d65f557f TM |
1124 | out_noforce: |
1125 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1126 | spin_unlock(&inode->i_lock); | |
1127 | return status; | |
70ca8852 TM |
1128 | } |
1129 | ||
1da177e4 LT |
1130 | /* |
1131 | * Many nfs protocol calls return the new file attributes after | |
1132 | * an operation. Here we update the inode to reflect the state | |
1133 | * of the server's inode. | |
1134 | * | |
1135 | * This is a bit tricky because we have to make sure all dirty pages | |
1136 | * have been sent off to the server before calling invalidate_inode_pages. | |
1137 | * To make sure no other process adds more write requests while we try | |
1138 | * our best to flush them, we make them sleep during the attribute refresh. | |
1139 | * | |
1140 | * A very similar scenario holds for the dir cache. | |
1141 | */ | |
24aa1fe6 | 1142 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1143 | { |
8b4bdcf8 | 1144 | struct nfs_server *server; |
1da177e4 | 1145 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1146 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1147 | unsigned long invalid = 0; |
3e7d950a | 1148 | unsigned long now = jiffies; |
1da177e4 LT |
1149 | |
1150 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
3110ff80 | 1151 | __func__, inode->i_sb->s_id, inode->i_ino, |
1da177e4 LT |
1152 | atomic_read(&inode->i_count), fattr->valid); |
1153 | ||
9e6e70f8 | 1154 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
325cfed9 | 1155 | goto out_fileid; |
1da177e4 LT |
1156 | |
1157 | /* | |
1158 | * Make sure the inode's type hasn't changed. | |
1159 | */ | |
9e6e70f8 | 1160 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1161 | goto out_changed; |
1162 | ||
8b4bdcf8 | 1163 | server = NFS_SERVER(inode); |
a0356862 | 1164 | /* Update the fsid? */ |
9e6e70f8 | 1165 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 TM |
1166 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
1167 | !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags)) | |
8b4bdcf8 TM |
1168 | server->fsid = fattr->fsid; |
1169 | ||
1da177e4 LT |
1170 | /* |
1171 | * Update the read time so we don't revalidate too often. | |
1172 | */ | |
33801147 | 1173 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1174 | |
9e6e70f8 TM |
1175 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) || (fattr->valid & (NFS_ATTR_FATTR_MTIME|NFS_ATTR_FATTR_CTIME))) |
1176 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1177 | | NFS_INO_INVALID_ATIME | |
1178 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1179 | |
a895b4a1 TM |
1180 | /* Do atomic weak cache consistency updates */ |
1181 | nfs_wcc_update_inode(inode, fattr); | |
1182 | ||
47aabaa7 | 1183 | /* More cache consistency checks */ |
9e6e70f8 TM |
1184 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
1185 | if (nfsi->change_attr != fattr->change_attr) { | |
1186 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
1187 | inode->i_sb->s_id, inode->i_ino); | |
1188 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1189 | if (S_ISDIR(inode->i_mode)) | |
1190 | nfs_force_lookup_revalidate(inode); | |
1191 | nfsi->change_attr = fattr->change_attr; | |
1192 | } | |
1193 | } | |
1194 | ||
1195 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
47aabaa7 TM |
1196 | /* NFSv2/v3: Check if the mtime agrees */ |
1197 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { | |
1198 | dprintk("NFS: mtime change on server for file %s/%ld\n", | |
1199 | inode->i_sb->s_id, inode->i_ino); | |
1200 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
bfc69a45 TM |
1201 | if (S_ISDIR(inode->i_mode)) |
1202 | nfs_force_lookup_revalidate(inode); | |
9e6e70f8 | 1203 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
47aabaa7 | 1204 | } |
9e6e70f8 TM |
1205 | } |
1206 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { | |
47aabaa7 | 1207 | /* If ctime has changed we should definitely clear access+acl caches */ |
37d9d76d | 1208 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
4704f0e2 | 1209 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
37d9d76d N |
1210 | /* and probably clear data for a directory too as utimes can cause |
1211 | * havoc with our cache. | |
1212 | */ | |
1213 | if (S_ISDIR(inode->i_mode)) { | |
1214 | invalid |= NFS_INO_INVALID_DATA; | |
1215 | nfs_force_lookup_revalidate(inode); | |
1216 | } | |
9e6e70f8 | 1217 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
37d9d76d | 1218 | } |
47aabaa7 TM |
1219 | } |
1220 | ||
951a143b | 1221 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1222 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1223 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1224 | cur_isize = i_size_read(inode); | |
1225 | if (new_isize != cur_isize) { | |
1226 | /* Do we perhaps have any outstanding writes, or has | |
1227 | * the file grown beyond our last write? */ | |
1228 | if (nfsi->npages == 0 || new_isize > cur_isize) { | |
1229 | i_size_write(inode, new_isize); | |
1230 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1231 | } | |
1232 | dprintk("NFS: isize change on server for file %s/%ld\n", | |
1233 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 LT |
1234 | } |
1235 | } | |
1236 | ||
1da177e4 | 1237 | |
9e6e70f8 TM |
1238 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1239 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
1da177e4 | 1240 | |
9e6e70f8 TM |
1241 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1242 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
1243 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1244 | inode->i_mode = fattr->mode; | |
1245 | } | |
1246 | } | |
1247 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { | |
1248 | if (inode->i_uid != fattr->uid) { | |
1249 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1250 | inode->i_uid = fattr->uid; | |
1251 | } | |
1252 | } | |
1253 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { | |
1254 | if (inode->i_gid != fattr->gid) { | |
1255 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1256 | inode->i_gid = fattr->gid; | |
1257 | } | |
37d9d76d | 1258 | } |
921615f1 | 1259 | |
9e6e70f8 TM |
1260 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1261 | if (inode->i_nlink != fattr->nlink) { | |
1262 | invalid |= NFS_INO_INVALID_ATTR; | |
1263 | if (S_ISDIR(inode->i_mode)) | |
1264 | invalid |= NFS_INO_INVALID_DATA; | |
1265 | inode->i_nlink = fattr->nlink; | |
1266 | } | |
1267 | } | |
1da177e4 | 1268 | |
9e6e70f8 | 1269 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1270 | /* |
1271 | * report the blocks in 512byte units | |
1272 | */ | |
1273 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1274 | } |
9e6e70f8 TM |
1275 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1276 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1277 | |
1278 | /* Update attrtimeo value if we're out of the unstable period */ | |
1279 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1280 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1281 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1282 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1283 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1284 | } else { |
64672d55 | 1285 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1286 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1287 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1288 | nfsi->attrtimeo_timestamp = now; | |
1289 | } | |
1da177e4 | 1290 | } |
f2115dc9 | 1291 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1292 | /* Don't invalidate the data if we were to blame */ |
1293 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1294 | || S_ISLNK(inode->i_mode))) | |
1295 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce TM |
1296 | if (!nfs_have_delegation(inode, FMODE_READ) || |
1297 | (nfsi->cache_validity & NFS_INO_REVAL_FORCED)) | |
55296809 | 1298 | nfsi->cache_validity |= invalid; |
412c77ce | 1299 | nfsi->cache_validity &= ~NFS_INO_REVAL_FORCED; |
1da177e4 LT |
1300 | |
1301 | return 0; | |
1302 | out_changed: | |
1303 | /* | |
1304 | * Big trouble! The inode has become a different object. | |
1305 | */ | |
1da177e4 | 1306 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
3110ff80 | 1307 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
b37b03b7 | 1308 | out_err: |
1da177e4 LT |
1309 | /* |
1310 | * No need to worry about unhashing the dentry, as the | |
1311 | * lookup validation will know that the inode is bad. | |
1312 | * (But we fall through to invalidate the caches.) | |
1313 | */ | |
1314 | nfs_invalidate_inode(inode); | |
1da177e4 | 1315 | return -ESTALE; |
325cfed9 CL |
1316 | |
1317 | out_fileid: | |
1318 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1319 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
54ceac45 | 1320 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
325cfed9 CL |
1321 | (long long)nfsi->fileid, (long long)fattr->fileid); |
1322 | goto out_err; | |
1da177e4 LT |
1323 | } |
1324 | ||
55a97593 | 1325 | |
1da177e4 LT |
1326 | #ifdef CONFIG_NFS_V4 |
1327 | ||
1da177e4 LT |
1328 | /* |
1329 | * Clean out any remaining NFSv4 state that might be left over due | |
1330 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1331 | * nfs_open(). | |
1332 | */ | |
f7b422b1 | 1333 | void nfs4_clear_inode(struct inode *inode) |
1da177e4 | 1334 | { |
1da177e4 | 1335 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1336 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1337 | /* First call standard NFS clear_inode() code */ |
1338 | nfs_clear_inode(inode); | |
1da177e4 | 1339 | } |
1da177e4 LT |
1340 | #endif |
1341 | ||
f7b422b1 | 1342 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1343 | { |
1344 | struct nfs_inode *nfsi; | |
e94b1766 | 1345 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1346 | if (!nfsi) |
1347 | return NULL; | |
55296809 CL |
1348 | nfsi->flags = 0UL; |
1349 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1350 | #ifdef CONFIG_NFS_V3_ACL |
1351 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1352 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1353 | #endif | |
e50a1c2e BF |
1354 | #ifdef CONFIG_NFS_V4 |
1355 | nfsi->nfs4_acl = NULL; | |
1356 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1357 | return &nfsi->vfs_inode; |
1358 | } | |
1359 | ||
f7b422b1 | 1360 | void nfs_destroy_inode(struct inode *inode) |
1da177e4 LT |
1361 | { |
1362 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
1363 | } | |
1364 | ||
d75d5414 AM |
1365 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1366 | { | |
1367 | #ifdef CONFIG_NFS_V4 | |
1368 | INIT_LIST_HEAD(&nfsi->open_states); | |
1369 | nfsi->delegation = NULL; | |
1370 | nfsi->delegation_state = 0; | |
1371 | init_rwsem(&nfsi->rwsem); | |
1372 | #endif | |
1373 | } | |
f7b422b1 | 1374 | |
51cc5068 | 1375 | static void init_once(void *foo) |
1da177e4 LT |
1376 | { |
1377 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1378 | ||
a35afb83 | 1379 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1380 | INIT_LIST_HEAD(&nfsi->open_files); |
1381 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1382 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
1383 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
a35afb83 | 1384 | nfsi->npages = 0; |
565277f6 TM |
1385 | atomic_set(&nfsi->silly_count, 1); |
1386 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1387 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1388 | nfs4_init_once(nfsi); |
1da177e4 | 1389 | } |
20c2df83 | 1390 | |
f7b422b1 | 1391 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1392 | { |
1393 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1394 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1395 | 0, (SLAB_RECLAIM_ACCOUNT| |
1396 | SLAB_MEM_SPREAD), | |
20c2df83 | 1397 | init_once); |
1da177e4 LT |
1398 | if (nfs_inode_cachep == NULL) |
1399 | return -ENOMEM; | |
1400 | ||
1401 | return 0; | |
1402 | } | |
1403 | ||
266bee88 | 1404 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1405 | { |
1a1d92c1 | 1406 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1407 | } |
1408 | ||
5746006f TM |
1409 | struct workqueue_struct *nfsiod_workqueue; |
1410 | ||
1411 | /* | |
1412 | * start up the nfsiod workqueue | |
1413 | */ | |
1414 | static int nfsiod_start(void) | |
1415 | { | |
1416 | struct workqueue_struct *wq; | |
1417 | dprintk("RPC: creating workqueue nfsiod\n"); | |
1418 | wq = create_singlethread_workqueue("nfsiod"); | |
1419 | if (wq == NULL) | |
1420 | return -ENOMEM; | |
1421 | nfsiod_workqueue = wq; | |
1422 | return 0; | |
1423 | } | |
1424 | ||
1425 | /* | |
1426 | * Destroy the nfsiod workqueue | |
1427 | */ | |
1428 | static void nfsiod_stop(void) | |
1429 | { | |
1430 | struct workqueue_struct *wq; | |
1431 | ||
1432 | wq = nfsiod_workqueue; | |
1433 | if (wq == NULL) | |
1434 | return; | |
1435 | nfsiod_workqueue = NULL; | |
1436 | destroy_workqueue(wq); | |
1437 | } | |
1438 | ||
1da177e4 LT |
1439 | /* |
1440 | * Initialize NFS | |
1441 | */ | |
1442 | static int __init init_nfs_fs(void) | |
1443 | { | |
1444 | int err; | |
1445 | ||
8ec442ae DH |
1446 | err = nfs_fscache_register(); |
1447 | if (err < 0) | |
1448 | goto out7; | |
1449 | ||
5746006f TM |
1450 | err = nfsiod_start(); |
1451 | if (err) | |
1452 | goto out6; | |
1453 | ||
6aaca566 DH |
1454 | err = nfs_fs_proc_init(); |
1455 | if (err) | |
1456 | goto out5; | |
1457 | ||
1da177e4 LT |
1458 | err = nfs_init_nfspagecache(); |
1459 | if (err) | |
1460 | goto out4; | |
1461 | ||
1462 | err = nfs_init_inodecache(); | |
1463 | if (err) | |
1464 | goto out3; | |
1465 | ||
1466 | err = nfs_init_readpagecache(); | |
1467 | if (err) | |
1468 | goto out2; | |
1469 | ||
1470 | err = nfs_init_writepagecache(); | |
1471 | if (err) | |
1472 | goto out1; | |
1473 | ||
1da177e4 LT |
1474 | err = nfs_init_directcache(); |
1475 | if (err) | |
1476 | goto out0; | |
1da177e4 LT |
1477 | |
1478 | #ifdef CONFIG_PROC_FS | |
1479 | rpc_proc_register(&nfs_rpcstat); | |
1480 | #endif | |
f7b422b1 | 1481 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1482 | goto out; |
1483 | return 0; | |
1484 | out: | |
1485 | #ifdef CONFIG_PROC_FS | |
1486 | rpc_proc_unregister("nfs"); | |
1487 | #endif | |
1da177e4 | 1488 | nfs_destroy_directcache(); |
6b59a754 | 1489 | out0: |
6b59a754 | 1490 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1491 | out1: |
1492 | nfs_destroy_readpagecache(); | |
1493 | out2: | |
1494 | nfs_destroy_inodecache(); | |
1495 | out3: | |
1496 | nfs_destroy_nfspagecache(); | |
1497 | out4: | |
6aaca566 DH |
1498 | nfs_fs_proc_exit(); |
1499 | out5: | |
5746006f TM |
1500 | nfsiod_stop(); |
1501 | out6: | |
8ec442ae DH |
1502 | nfs_fscache_unregister(); |
1503 | out7: | |
1da177e4 LT |
1504 | return err; |
1505 | } | |
1506 | ||
1507 | static void __exit exit_nfs_fs(void) | |
1508 | { | |
1da177e4 | 1509 | nfs_destroy_directcache(); |
1da177e4 LT |
1510 | nfs_destroy_writepagecache(); |
1511 | nfs_destroy_readpagecache(); | |
1512 | nfs_destroy_inodecache(); | |
1513 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1514 | nfs_fscache_unregister(); |
1da177e4 LT |
1515 | #ifdef CONFIG_PROC_FS |
1516 | rpc_proc_unregister("nfs"); | |
1517 | #endif | |
f7b422b1 | 1518 | unregister_nfs_fs(); |
6aaca566 | 1519 | nfs_fs_proc_exit(); |
5746006f | 1520 | nfsiod_stop(); |
1da177e4 LT |
1521 | } |
1522 | ||
1523 | /* Not quite true; I just maintain it */ | |
1524 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1525 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1526 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1527 | |
1528 | module_init(init_nfs_fs) | |
1529 | module_exit(exit_nfs_fs) |