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> | |
1da177e4 LT |
33 | #include <linux/seq_file.h> |
34 | #include <linux/mount.h> | |
35 | #include <linux/nfs_idmap.h> | |
36 | #include <linux/vfs.h> | |
9cdb3883 MN |
37 | #include <linux/inet.h> |
38 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 39 | #include <linux/slab.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" |
e571cbf1 | 50 | #include "dns_resolve.h" |
e5e94017 | 51 | #include "pnfs.h" |
1da177e4 LT |
52 | |
53 | #define NFSDBG_FACILITY NFSDBG_VFS | |
1da177e4 | 54 | |
f43bf0be TM |
55 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
56 | ||
57 | /* Default is to see 64-bit inode numbers */ | |
58 | static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; | |
59 | ||
1da177e4 | 60 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 61 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 62 | |
e18b890b | 63 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 64 | |
1da177e4 LT |
65 | static inline unsigned long |
66 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
67 | { | |
68 | return nfs_fileid_to_ino_t(fattr->fileid); | |
69 | } | |
70 | ||
72cb77f4 TM |
71 | /** |
72 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
73 | * @word: long word containing the bit lock | |
74 | */ | |
75 | int nfs_wait_bit_killable(void *word) | |
76 | { | |
77 | if (fatal_signal_pending(current)) | |
78 | return -ERESTARTSYS; | |
79 | schedule(); | |
80 | return 0; | |
81 | } | |
82 | ||
f43bf0be TM |
83 | /** |
84 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
85 | * @fileid: 64-bit fileid | |
86 | * | |
87 | * This function returns a 32-bit inode number if the boot parameter | |
88 | * nfs.enable_ino64 is zero. | |
89 | */ | |
90 | u64 nfs_compat_user_ino64(u64 fileid) | |
91 | { | |
92 | int ino; | |
93 | ||
94 | if (enable_ino64) | |
95 | return fileid; | |
96 | ino = fileid; | |
97 | if (sizeof(ino) < sizeof(fileid)) | |
98 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
99 | return ino; | |
100 | } | |
101 | ||
b57922d9 | 102 | static void nfs_clear_inode(struct inode *inode) |
1da177e4 | 103 | { |
da6d503a TM |
104 | /* |
105 | * The following should never happen... | |
106 | */ | |
107 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 108 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 109 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 110 | nfs_access_zap_cache(inode); |
ef79c097 | 111 | nfs_fscache_release_inode_cookie(inode); |
1da177e4 LT |
112 | } |
113 | ||
b57922d9 AV |
114 | void nfs_evict_inode(struct inode *inode) |
115 | { | |
116 | truncate_inode_pages(&inode->i_data, 0); | |
117 | end_writeback(inode); | |
118 | nfs_clear_inode(inode); | |
119 | } | |
120 | ||
29884df0 TM |
121 | /** |
122 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
123 | */ | |
124 | int nfs_sync_mapping(struct address_space *mapping) | |
125 | { | |
5cf95214 | 126 | int ret = 0; |
29884df0 | 127 | |
5cf95214 TM |
128 | if (mapping->nrpages != 0) { |
129 | unmap_mapping_range(mapping, 0, 0, 0); | |
130 | ret = nfs_wb_all(mapping->host); | |
131 | } | |
29884df0 TM |
132 | return ret; |
133 | } | |
134 | ||
1da177e4 LT |
135 | /* |
136 | * Invalidate the local caches | |
137 | */ | |
b37b03b7 | 138 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
139 | { |
140 | struct nfs_inode *nfsi = NFS_I(inode); | |
141 | int mode = inode->i_mode; | |
142 | ||
91d5b470 CL |
143 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
144 | ||
c7c20973 TM |
145 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
146 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 LT |
147 | |
148 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
149 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 150 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 151 | else |
55296809 | 152 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 153 | } |
dc59250c | 154 | |
b37b03b7 TM |
155 | void nfs_zap_caches(struct inode *inode) |
156 | { | |
157 | spin_lock(&inode->i_lock); | |
158 | nfs_zap_caches_locked(inode); | |
dc59250c | 159 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
160 | } |
161 | ||
cd9ae2b6 TM |
162 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
163 | { | |
164 | if (mapping->nrpages != 0) { | |
165 | spin_lock(&inode->i_lock); | |
166 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
167 | spin_unlock(&inode->i_lock); | |
168 | } | |
169 | } | |
170 | ||
f41f7418 | 171 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
172 | { |
173 | void (*clear_acl_cache)(struct inode *); | |
174 | ||
175 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
176 | if (clear_acl_cache != NULL) | |
177 | clear_acl_cache(inode); | |
dc59250c | 178 | spin_lock(&inode->i_lock); |
55296809 | 179 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 180 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
181 | } |
182 | ||
c4812998 TM |
183 | void nfs_invalidate_atime(struct inode *inode) |
184 | { | |
185 | spin_lock(&inode->i_lock); | |
186 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
187 | spin_unlock(&inode->i_lock); | |
188 | } | |
189 | ||
1da177e4 | 190 | /* |
b37b03b7 TM |
191 | * Invalidate, but do not unhash, the inode. |
192 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 193 | */ |
b37b03b7 | 194 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 195 | { |
3a10c30a | 196 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 197 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
198 | } |
199 | ||
200 | struct nfs_find_desc { | |
201 | struct nfs_fh *fh; | |
202 | struct nfs_fattr *fattr; | |
203 | }; | |
204 | ||
205 | /* | |
206 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
207 | * this, and re-exported directories (also seen in NFSv2) | |
208 | * we are forced to allow 2 different inodes to have the same | |
209 | * i_ino. | |
210 | */ | |
211 | static int | |
212 | nfs_find_actor(struct inode *inode, void *opaque) | |
213 | { | |
214 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
215 | struct nfs_fh *fh = desc->fh; | |
216 | struct nfs_fattr *fattr = desc->fattr; | |
217 | ||
218 | if (NFS_FILEID(inode) != fattr->fileid) | |
219 | return 0; | |
220 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
221 | return 0; | |
222 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
223 | return 0; | |
224 | return 1; | |
225 | } | |
226 | ||
227 | static int | |
228 | nfs_init_locked(struct inode *inode, void *opaque) | |
229 | { | |
230 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
231 | struct nfs_fattr *fattr = desc->fattr; | |
232 | ||
99fadcd7 | 233 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
234 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
235 | return 0; | |
236 | } | |
237 | ||
1da177e4 LT |
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 | ||
9e6e70f8 | 252 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) |
1da177e4 | 253 | goto out_no_inode; |
9e6e70f8 | 254 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 255 | goto out_no_inode; |
1da177e4 LT |
256 | |
257 | hash = nfs_fattr_to_ino_t(fattr); | |
258 | ||
03f28e3a TM |
259 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
260 | if (inode == NULL) { | |
261 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 262 | goto out_no_inode; |
03f28e3a | 263 | } |
1da177e4 LT |
264 | |
265 | if (inode->i_state & I_NEW) { | |
266 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 267 | unsigned long now = jiffies; |
1da177e4 LT |
268 | |
269 | /* We set i_ino for the few things that still rely on it, | |
270 | * such as stat(2) */ | |
271 | inode->i_ino = hash; | |
272 | ||
273 | /* We can't support update_atime(), since the server will reset it */ | |
274 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
275 | inode->i_mode = fattr->mode; | |
62ab460c TM |
276 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
277 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
278 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
279 | | NFS_INO_INVALID_ACCESS | |
280 | | NFS_INO_INVALID_ACL; | |
1da177e4 LT |
281 | /* Why so? Because we want revalidate for devices/FIFOs, and |
282 | * that's precisely what we have in nfs_file_inode_operations. | |
283 | */ | |
8fa5c000 | 284 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 LT |
285 | if (S_ISREG(inode->i_mode)) { |
286 | inode->i_fop = &nfs_file_operations; | |
287 | inode->i_data.a_ops = &nfs_file_aops; | |
288 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
289 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 290 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 291 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 292 | inode->i_data.a_ops = &nfs_dir_aops; |
0715dc63 | 293 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)) |
3a10c30a | 294 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
55a97593 | 295 | /* Deal with crossing mountpoints */ |
9e6e70f8 TM |
296 | if ((fattr->valid & NFS_ATTR_FATTR_FSID) |
297 | && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { | |
6b97fd3d MN |
298 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
299 | inode->i_op = &nfs_referral_inode_operations; | |
300 | else | |
301 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 302 | inode->i_fop = NULL; |
36d43a43 | 303 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 304 | } |
1da177e4 LT |
305 | } else if (S_ISLNK(inode->i_mode)) |
306 | inode->i_op = &nfs_symlink_inode_operations; | |
307 | else | |
308 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
309 | ||
9e6e70f8 TM |
310 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
311 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
312 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
313 | nfsi->change_attr = 0; | |
314 | inode->i_size = 0; | |
315 | inode->i_nlink = 0; | |
316 | inode->i_uid = -2; | |
317 | inode->i_gid = -2; | |
318 | inode->i_blocks = 0; | |
319 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
320 | ||
33801147 | 321 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 322 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
323 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
324 | inode->i_atime = fattr->atime; | |
62ab460c TM |
325 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
326 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
327 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
328 | inode->i_mtime = fattr->mtime; | |
62ab460c TM |
329 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
330 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
331 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
332 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
333 | inode->i_ctime = fattr->ctime; | |
62ab460c TM |
334 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
335 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
336 | | NFS_INO_INVALID_ACCESS | |
337 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 | 338 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
1da177e4 | 339 | nfsi->change_attr = fattr->change_attr; |
62ab460c TM |
340 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
341 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
342 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
343 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
344 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
345 | else |
346 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
347 | | NFS_INO_INVALID_DATA | |
348 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
349 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
350 | inode->i_nlink = fattr->nlink; | |
62ab460c TM |
351 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
352 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
353 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
354 | inode->i_uid = fattr->uid; | |
62ab460c TM |
355 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
356 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
357 | | NFS_INO_INVALID_ACCESS | |
358 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
359 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
360 | inode->i_gid = fattr->gid; | |
62ab460c TM |
361 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
362 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
363 | | NFS_INO_INVALID_ACCESS | |
364 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
365 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
366 | inode->i_blocks = fattr->du.nfs2.blocks; | |
367 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
368 | /* |
369 | * report the blocks in 512byte units | |
370 | */ | |
371 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
372 | } |
373 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 374 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 375 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 376 | |
ef79c097 DH |
377 | nfs_fscache_init_inode_cookie(inode); |
378 | ||
1da177e4 LT |
379 | unlock_new_inode(inode); |
380 | } else | |
381 | nfs_refresh_inode(inode, fattr); | |
382 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
383 | inode->i_sb->s_id, | |
384 | (long long)NFS_FILEID(inode), | |
385 | atomic_read(&inode->i_count)); | |
386 | ||
387 | out: | |
388 | return inode; | |
389 | ||
390 | out_no_inode: | |
03f28e3a | 391 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
392 | goto out; |
393 | } | |
394 | ||
659bfcd6 | 395 | #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 |
396 | |
397 | int | |
398 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
399 | { | |
400 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
401 | struct nfs_fattr *fattr; |
402 | int error = -ENOMEM; | |
1da177e4 | 403 | |
91d5b470 CL |
404 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
405 | ||
188b95dd JL |
406 | /* skip mode change if it's just for clearing setuid/setgid */ |
407 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
408 | attr->ia_valid &= ~ATTR_MODE; | |
409 | ||
1da177e4 LT |
410 | if (attr->ia_valid & ATTR_SIZE) { |
411 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
412 | attr->ia_valid &= ~ATTR_SIZE; | |
413 | } | |
414 | ||
415 | /* Optimization: if the end result is no change, don't RPC */ | |
416 | attr->ia_valid &= NFS_VALID_ATTRS; | |
659bfcd6 | 417 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
1da177e4 LT |
418 | return 0; |
419 | ||
755c1e20 | 420 | /* Write all dirty data */ |
1b924e5f | 421 | if (S_ISREG(inode->i_mode)) |
e1552e19 | 422 | nfs_wb_all(inode); |
987f8dfc TM |
423 | |
424 | fattr = nfs_alloc_fattr(); | |
425 | if (fattr == NULL) | |
426 | goto out; | |
642ac549 TM |
427 | /* |
428 | * Return any delegations if we're going to change ACLs | |
429 | */ | |
430 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
431 | nfs_inode_return_delegation(inode); | |
987f8dfc | 432 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 433 | if (error == 0) |
987f8dfc TM |
434 | nfs_refresh_inode(inode, fattr); |
435 | nfs_free_fattr(fattr); | |
436 | out: | |
65e4308d TM |
437 | return error; |
438 | } | |
439 | ||
a3d01454 TM |
440 | /** |
441 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
442 | * @inode: inode of the file used | |
443 | * @offset: file offset to start truncating | |
444 | * | |
445 | * This is a copy of the common vmtruncate, but with the locking | |
446 | * corrected to take into account the fact that NFS requires | |
447 | * inode->i_size to be updated under the inode->i_lock. | |
448 | */ | |
449 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
450 | { | |
c08d3b0e | 451 | loff_t oldsize; |
452 | int err; | |
a3d01454 | 453 | |
c08d3b0e | 454 | err = inode_newsize_ok(inode, offset); |
455 | if (err) | |
456 | goto out; | |
a3d01454 | 457 | |
c08d3b0e | 458 | spin_lock(&inode->i_lock); |
459 | oldsize = inode->i_size; | |
460 | i_size_write(inode, offset); | |
461 | spin_unlock(&inode->i_lock); | |
462 | ||
463 | truncate_pagecache(inode, oldsize, offset); | |
464 | out: | |
465 | return err; | |
a3d01454 TM |
466 | } |
467 | ||
65e4308d TM |
468 | /** |
469 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
470 | * @inode: pointer to struct inode | |
471 | * @attr: pointer to struct iattr | |
472 | * | |
473 | * Note: we do this in the *proc.c in order to ensure that | |
474 | * it works for things like exclusive creates too. | |
475 | */ | |
476 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
477 | { | |
478 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 479 | spin_lock(&inode->i_lock); |
1da177e4 | 480 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
481 | int mode = attr->ia_mode & S_IALLUGO; |
482 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
483 | inode->i_mode = mode; |
484 | } | |
485 | if ((attr->ia_valid & ATTR_UID) != 0) | |
486 | inode->i_uid = attr->ia_uid; | |
487 | if ((attr->ia_valid & ATTR_GID) != 0) | |
488 | inode->i_gid = attr->ia_gid; | |
55296809 | 489 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 490 | spin_unlock(&inode->i_lock); |
65e4308d TM |
491 | } |
492 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 493 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 494 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 495 | } |
1da177e4 LT |
496 | } |
497 | ||
1da177e4 LT |
498 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
499 | { | |
500 | struct inode *inode = dentry->d_inode; | |
55296809 | 501 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
502 | int err; |
503 | ||
acdc53b2 | 504 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 505 | if (S_ISREG(inode->i_mode)) { |
acdc53b2 TM |
506 | err = filemap_write_and_wait(inode->i_mapping); |
507 | if (err) | |
508 | goto out; | |
28c494c5 | 509 | } |
fc33a7bb CH |
510 | |
511 | /* | |
512 | * We may force a getattr if the user cares about atime. | |
513 | * | |
514 | * Note that we only have to check the vfsmount flags here: | |
515 | * - NFS always sets S_NOATIME by so checking it would give a | |
516 | * bogus result | |
517 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
518 | * no point in checking those. | |
519 | */ | |
520 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
521 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 522 | need_atime = 0; |
fc33a7bb | 523 | |
1da177e4 LT |
524 | if (need_atime) |
525 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
526 | else | |
527 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 528 | if (!err) { |
1da177e4 | 529 | generic_fillattr(inode, stat); |
f43bf0be | 530 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 531 | } |
acdc53b2 | 532 | out: |
1da177e4 LT |
533 | return err; |
534 | } | |
535 | ||
f11ac8db TM |
536 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
537 | { | |
538 | atomic_set(&l_ctx->count, 1); | |
539 | l_ctx->lockowner = current->files; | |
540 | l_ctx->pid = current->tgid; | |
541 | INIT_LIST_HEAD(&l_ctx->list); | |
542 | } | |
543 | ||
544 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
545 | { | |
546 | struct nfs_lock_context *pos; | |
547 | ||
548 | list_for_each_entry(pos, &ctx->lock_context.list, list) { | |
549 | if (pos->lockowner != current->files) | |
550 | continue; | |
551 | if (pos->pid != current->tgid) | |
552 | continue; | |
553 | atomic_inc(&pos->count); | |
554 | return pos; | |
555 | } | |
556 | return NULL; | |
557 | } | |
558 | ||
559 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
560 | { | |
561 | struct nfs_lock_context *res, *new = NULL; | |
562 | struct inode *inode = ctx->path.dentry->d_inode; | |
563 | ||
564 | spin_lock(&inode->i_lock); | |
565 | res = __nfs_find_lock_context(ctx); | |
566 | if (res == NULL) { | |
567 | spin_unlock(&inode->i_lock); | |
568 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
569 | if (new == NULL) | |
570 | return NULL; | |
571 | nfs_init_lock_context(new); | |
572 | spin_lock(&inode->i_lock); | |
573 | res = __nfs_find_lock_context(ctx); | |
574 | if (res == NULL) { | |
575 | list_add_tail(&new->list, &ctx->lock_context.list); | |
576 | new->open_context = ctx; | |
577 | res = new; | |
578 | new = NULL; | |
579 | } | |
580 | } | |
581 | spin_unlock(&inode->i_lock); | |
582 | kfree(new); | |
583 | return res; | |
584 | } | |
585 | ||
586 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
587 | { | |
588 | struct nfs_open_context *ctx = l_ctx->open_context; | |
589 | struct inode *inode = ctx->path.dentry->d_inode; | |
590 | ||
591 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
592 | return; | |
593 | list_del(&l_ctx->list); | |
594 | spin_unlock(&inode->i_lock); | |
595 | kfree(l_ctx); | |
596 | } | |
597 | ||
7fe5c398 TM |
598 | /** |
599 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
600 | * @ctx: pointer to context | |
601 | * @is_sync: is this a synchronous close | |
602 | * | |
603 | * always ensure that the attributes are up to date if we're mounted | |
604 | * with close-to-open semantics | |
605 | */ | |
606 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
607 | { | |
608 | struct inode *inode; | |
609 | struct nfs_server *server; | |
610 | ||
611 | if (!(ctx->mode & FMODE_WRITE)) | |
612 | return; | |
613 | if (!is_sync) | |
614 | return; | |
615 | inode = ctx->path.dentry->d_inode; | |
616 | if (!list_empty(&NFS_I(inode)->open_files)) | |
617 | return; | |
618 | server = NFS_SERVER(inode); | |
619 | if (server->flags & NFS_MOUNT_NOCTO) | |
620 | return; | |
621 | nfs_revalidate_inode(server, inode); | |
622 | } | |
623 | ||
cd9a1c0e | 624 | struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode) |
1da177e4 LT |
625 | { |
626 | struct nfs_open_context *ctx; | |
627 | ||
f52720ca | 628 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
1da177e4 | 629 | if (ctx != NULL) { |
6eae7974 AV |
630 | ctx->path = *path; |
631 | path_get(&ctx->path); | |
1da177e4 LT |
632 | ctx->cred = get_rpccred(cred); |
633 | ctx->state = NULL; | |
cd9a1c0e | 634 | ctx->mode = f_mode; |
66d3aac0 | 635 | ctx->flags = 0; |
1da177e4 | 636 | ctx->error = 0; |
00a92642 | 637 | ctx->dir_cookie = 0; |
f11ac8db TM |
638 | nfs_init_lock_context(&ctx->lock_context); |
639 | ctx->lock_context.open_context = ctx; | |
5c78f58e | 640 | INIT_LIST_HEAD(&ctx->list); |
1da177e4 LT |
641 | } |
642 | return ctx; | |
643 | } | |
644 | ||
645 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
646 | { | |
647 | if (ctx != NULL) | |
f11ac8db | 648 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
649 | return ctx; |
650 | } | |
651 | ||
7fe5c398 | 652 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 653 | { |
7fe5c398 | 654 | struct inode *inode = ctx->path.dentry->d_inode; |
3bec63db | 655 | |
5c78f58e | 656 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
657 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
658 | return; | |
659 | list_del(&ctx->list); | |
660 | spin_unlock(&inode->i_lock); | |
ef84303e | 661 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 662 | return; |
5c78f58e TM |
663 | if (inode != NULL) |
664 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
665 | if (ctx->cred != NULL) |
666 | put_rpccred(ctx->cred); | |
31f31db1 | 667 | path_put(&ctx->path); |
3bec63db TM |
668 | kfree(ctx); |
669 | } | |
670 | ||
a49c3c77 TM |
671 | void put_nfs_open_context(struct nfs_open_context *ctx) |
672 | { | |
673 | __put_nfs_open_context(ctx, 0); | |
674 | } | |
675 | ||
1da177e4 LT |
676 | /* |
677 | * Ensure that mmap has a recent RPC credential for use when writing out | |
678 | * shared pages | |
679 | */ | |
cd9a1c0e | 680 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 681 | { |
01cce933 | 682 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
683 | struct nfs_inode *nfsi = NFS_I(inode); |
684 | ||
685 | filp->private_data = get_nfs_open_context(ctx); | |
686 | spin_lock(&inode->i_lock); | |
687 | list_add(&ctx->list, &nfsi->open_files); | |
688 | spin_unlock(&inode->i_lock); | |
689 | } | |
690 | ||
d530838b TM |
691 | /* |
692 | * Given an inode, search for an open context with the desired characteristics | |
693 | */ | |
dc0b027d | 694 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
695 | { |
696 | struct nfs_inode *nfsi = NFS_I(inode); | |
697 | struct nfs_open_context *pos, *ctx = NULL; | |
698 | ||
699 | spin_lock(&inode->i_lock); | |
700 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
701 | if (cred != NULL && pos->cred != cred) |
702 | continue; | |
1544fa0f TM |
703 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
704 | continue; | |
705 | ctx = get_nfs_open_context(pos); | |
706 | break; | |
1da177e4 LT |
707 | } |
708 | spin_unlock(&inode->i_lock); | |
709 | return ctx; | |
710 | } | |
711 | ||
b92dccf6 | 712 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 713 | { |
01cce933 | 714 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 715 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
716 | |
717 | if (ctx) { | |
718 | filp->private_data = NULL; | |
719 | spin_lock(&inode->i_lock); | |
720 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
721 | spin_unlock(&inode->i_lock); | |
f895c53f | 722 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
723 | } |
724 | } | |
725 | ||
726 | /* | |
727 | * These allocate and release file read/write context information. | |
728 | */ | |
729 | int nfs_open(struct inode *inode, struct file *filp) | |
730 | { | |
731 | struct nfs_open_context *ctx; | |
732 | struct rpc_cred *cred; | |
733 | ||
98a8e323 | 734 | cred = rpc_lookup_cred(); |
1da177e4 LT |
735 | if (IS_ERR(cred)) |
736 | return PTR_ERR(cred); | |
cd9a1c0e | 737 | ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode); |
1da177e4 LT |
738 | put_rpccred(cred); |
739 | if (ctx == NULL) | |
740 | return -ENOMEM; | |
1da177e4 LT |
741 | nfs_file_set_open_context(filp, ctx); |
742 | put_nfs_open_context(ctx); | |
ef79c097 | 743 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
744 | return 0; |
745 | } | |
746 | ||
747 | int nfs_release(struct inode *inode, struct file *filp) | |
748 | { | |
1da177e4 LT |
749 | nfs_file_clear_open_context(filp); |
750 | return 0; | |
751 | } | |
752 | ||
753 | /* | |
754 | * This function is called whenever some part of NFS notices that | |
755 | * the cached attributes have to be refreshed. | |
756 | */ | |
757 | int | |
758 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
759 | { | |
760 | int status = -ESTALE; | |
a3cba2aa | 761 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 762 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
763 | |
764 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
765 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
766 | ||
85233a7a | 767 | if (is_bad_inode(inode)) |
691beb13 | 768 | goto out; |
1da177e4 | 769 | if (NFS_STALE(inode)) |
412d582e | 770 | goto out; |
7fdc49c4 | 771 | |
a3cba2aa TM |
772 | status = -ENOMEM; |
773 | fattr = nfs_alloc_fattr(); | |
774 | if (fattr == NULL) | |
775 | goto out; | |
776 | ||
691beb13 | 777 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
a3cba2aa | 778 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
1da177e4 LT |
779 | if (status != 0) { |
780 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
781 | inode->i_sb->s_id, | |
782 | (long long)NFS_FILEID(inode), status); | |
783 | if (status == -ESTALE) { | |
784 | nfs_zap_caches(inode); | |
785 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 786 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
787 | } |
788 | goto out; | |
789 | } | |
790 | ||
a3cba2aa | 791 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
792 | if (status) { |
793 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
794 | inode->i_sb->s_id, | |
795 | (long long)NFS_FILEID(inode), status); | |
796 | goto out; | |
797 | } | |
55296809 | 798 | |
24aa1fe6 | 799 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 800 | nfs_zap_acl_cache(inode); |
55296809 | 801 | |
1da177e4 LT |
802 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
803 | inode->i_sb->s_id, | |
804 | (long long)NFS_FILEID(inode)); | |
805 | ||
412d582e | 806 | out: |
a3cba2aa | 807 | nfs_free_fattr(fattr); |
1da177e4 LT |
808 | return status; |
809 | } | |
810 | ||
811 | int nfs_attribute_timeout(struct inode *inode) | |
812 | { | |
813 | struct nfs_inode *nfsi = NFS_I(inode); | |
814 | ||
d7cf8dd0 TM |
815 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
816 | } | |
817 | ||
818 | static int nfs_attribute_cache_expired(struct inode *inode) | |
819 | { | |
b4d2314b | 820 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 821 | return 0; |
d7cf8dd0 | 822 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
823 | } |
824 | ||
825 | /** | |
826 | * nfs_revalidate_inode - Revalidate the inode attributes | |
827 | * @server - pointer to nfs_server struct | |
828 | * @inode - pointer to inode struct | |
829 | * | |
830 | * Updates inode attribute information by retrieving the data from the server. | |
831 | */ | |
832 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
833 | { | |
44b11874 | 834 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
d7cf8dd0 | 835 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
836 | return NFS_STALE(inode) ? -ESTALE : 0; |
837 | return __nfs_revalidate_inode(server, inode); | |
838 | } | |
839 | ||
1cda707d | 840 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
841 | { |
842 | struct nfs_inode *nfsi = NFS_I(inode); | |
843 | ||
844 | if (mapping->nrpages != 0) { | |
845 | int ret = invalidate_inode_pages2(mapping); | |
846 | if (ret < 0) | |
847 | return ret; | |
848 | } | |
849 | spin_lock(&inode->i_lock); | |
850 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 851 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 852 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
853 | spin_unlock(&inode->i_lock); |
854 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 855 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
856 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
857 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
858 | return 0; | |
859 | } | |
860 | ||
717d44e8 TM |
861 | /** |
862 | * nfs_revalidate_mapping - Revalidate the pagecache | |
863 | * @inode - pointer to host inode | |
864 | * @mapping - pointer to mapping | |
717d44e8 TM |
865 | */ |
866 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
867 | { | |
868 | struct nfs_inode *nfsi = NFS_I(inode); | |
869 | int ret = 0; | |
dc59250c | 870 | |
717d44e8 | 871 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
d7cf8dd0 TM |
872 | || nfs_attribute_cache_expired(inode) |
873 | || NFS_STALE(inode)) { | |
717d44e8 TM |
874 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
875 | if (ret < 0) | |
876 | goto out; | |
7d52e862 | 877 | } |
717d44e8 TM |
878 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
879 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 880 | out: |
44b11874 | 881 | return ret; |
7d52e862 TM |
882 | } |
883 | ||
27dc1cd3 | 884 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
885 | { |
886 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 887 | unsigned long ret = 0; |
a895b4a1 | 888 | |
9e6e70f8 TM |
889 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
890 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
891 | && nfsi->change_attr == fattr->pre_change_attr) { | |
70ca8852 TM |
892 | nfsi->change_attr = fattr->change_attr; |
893 | if (S_ISDIR(inode->i_mode)) | |
894 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 895 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 896 | } |
a895b4a1 | 897 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
898 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
899 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
900 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
901 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
902 | ret |= NFS_INO_INVALID_ATTR; | |
903 | } | |
9e6e70f8 TM |
904 | |
905 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
906 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
907 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
908 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
909 | if (S_ISDIR(inode->i_mode)) | |
910 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
911 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 912 | } |
9e6e70f8 TM |
913 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
914 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
915 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
916 | && nfsi->npages == 0) { |
917 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
918 | ret |= NFS_INO_INVALID_ATTR; | |
919 | } | |
920 | return ret; | |
a895b4a1 TM |
921 | } |
922 | ||
1da177e4 | 923 | /** |
33801147 | 924 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
925 | * @inode - pointer to inode |
926 | * @fattr - updated attributes | |
927 | * | |
928 | * Verifies the attribute cache. If we have just changed the attributes, | |
929 | * so that fattr carries weak cache consistency data, then it may | |
930 | * also update the ctime/mtime/change_attribute. | |
931 | */ | |
33801147 | 932 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
933 | { |
934 | struct nfs_inode *nfsi = NFS_I(inode); | |
935 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 936 | unsigned long invalid = 0; |
1da177e4 | 937 | |
dc59250c | 938 | |
ca62b9c3 | 939 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
940 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
941 | return -EIO; | |
942 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 943 | return -EIO; |
ca62b9c3 | 944 | |
9e6e70f8 | 945 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
f1bb0b92 | 946 | nfsi->change_attr != fattr->change_attr) |
2a3f5fd4 | 947 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 948 | |
1da177e4 | 949 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 950 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
2a3f5fd4 | 951 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
ca62b9c3 | 952 | |
9e6e70f8 TM |
953 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
954 | cur_size = i_size_read(inode); | |
955 | new_isize = nfs_size_to_loff_t(fattr->size); | |
956 | if (cur_size != new_isize && nfsi->npages == 0) | |
957 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
958 | } | |
1da177e4 LT |
959 | |
960 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
961 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
962 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
963 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
964 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
965 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 966 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
967 | |
968 | /* Has the link count changed? */ | |
9e6e70f8 | 969 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 970 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 971 | |
9e6e70f8 | 972 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
973 | invalid |= NFS_INO_INVALID_ATIME; |
974 | ||
975 | if (invalid != 0) | |
976 | nfsi->cache_validity |= invalid; | |
1da177e4 | 977 | |
33801147 | 978 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
979 | return 0; |
980 | } | |
981 | ||
a10ad176 | 982 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 983 | { |
9e6e70f8 TM |
984 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
985 | return 0; | |
a10ad176 TM |
986 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
987 | } | |
988 | ||
989 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
990 | { | |
9e6e70f8 TM |
991 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
992 | return 0; | |
a10ad176 TM |
993 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
994 | } | |
870a5be8 | 995 | |
ae05f269 | 996 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
997 | |
998 | static unsigned long nfs_read_attr_generation_counter(void) | |
999 | { | |
ae05f269 | 1000 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1001 | } |
1002 | ||
1003 | unsigned long nfs_inc_attr_generation_counter(void) | |
1004 | { | |
ae05f269 | 1005 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1006 | } |
1007 | ||
1008 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1009 | { | |
1010 | fattr->valid = 0; | |
1011 | fattr->time_start = jiffies; | |
1012 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1013 | } | |
1014 | ||
2d36bfde TM |
1015 | struct nfs_fattr *nfs_alloc_fattr(void) |
1016 | { | |
1017 | struct nfs_fattr *fattr; | |
1018 | ||
1019 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1020 | if (fattr != NULL) | |
1021 | nfs_fattr_init(fattr); | |
1022 | return fattr; | |
1023 | } | |
1024 | ||
1025 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1026 | { | |
1027 | struct nfs_fh *fh; | |
1028 | ||
1029 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1030 | if (fh != NULL) | |
1031 | fh->size = 0; | |
1032 | return fh; | |
1033 | } | |
1034 | ||
a10ad176 TM |
1035 | /** |
1036 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1037 | * @inode - pointer to inode | |
1038 | * @fattr - attributes | |
1039 | * | |
1040 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1041 | * attributes got scheduled after another call carrying updated ones. | |
1042 | * | |
1043 | * To do so, the function first assumes that a more recent ctime means | |
1044 | * that the attributes in fattr are newer, however it also attempt to | |
1045 | * catch the case where ctime either didn't change, or went backwards | |
1046 | * (if someone reset the clock on the server) by looking at whether | |
1047 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1048 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1049 | * |
1050 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1051 | * more recent than the ones cached in the inode. | |
1052 | * | |
1053 | */ | |
1054 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1055 | { | |
1056 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1057 | ||
4704f0e2 | 1058 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1059 | nfs_ctime_need_update(inode, fattr) || |
1060 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1061 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1062 | } |
1063 | ||
1064 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1065 | { | |
1066 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1067 | return nfs_update_inode(inode, fattr); |
1068 | return nfs_check_inode_attributes(inode, fattr); | |
1069 | } | |
1070 | ||
33801147 TM |
1071 | /** |
1072 | * nfs_refresh_inode - try to update the inode attribute cache | |
1073 | * @inode - pointer to inode | |
1074 | * @fattr - updated attributes | |
1075 | * | |
1076 | * Check that an RPC call that returned attributes has not overlapped with | |
1077 | * other recent updates of the inode metadata, then decide whether it is | |
1078 | * safe to do a full update of the inode attributes, or whether just to | |
1079 | * call nfs_check_inode_attributes. | |
1080 | */ | |
1081 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1082 | { | |
33801147 TM |
1083 | int status; |
1084 | ||
1085 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1086 | return 0; | |
1087 | spin_lock(&inode->i_lock); | |
870a5be8 | 1088 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1089 | spin_unlock(&inode->i_lock); |
ef79c097 | 1090 | |
33801147 TM |
1091 | return status; |
1092 | } | |
1093 | ||
d65f557f TM |
1094 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1095 | { | |
1096 | struct nfs_inode *nfsi = NFS_I(inode); | |
1097 | ||
1098 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1099 | if (S_ISDIR(inode->i_mode)) | |
1100 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1101 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1102 | return 0; | |
1103 | return nfs_refresh_inode_locked(inode, fattr); | |
1104 | } | |
1105 | ||
decf491f TM |
1106 | /** |
1107 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1108 | * @inode - pointer to inode | |
1109 | * @fattr - updated attributes | |
1110 | * | |
1111 | * After an operation that has changed the inode metadata, mark the | |
1112 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1113 | * |
1114 | * NB: if the server didn't return any post op attributes, this | |
1115 | * function will force the retrieval of attributes before the next | |
1116 | * NFS request. Thus it should be used only for operations that | |
1117 | * are expected to change one or more attributes, to avoid | |
1118 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1119 | */ |
1120 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1121 | { | |
d65f557f | 1122 | int status; |
decf491f | 1123 | |
7668fdbe | 1124 | spin_lock(&inode->i_lock); |
d65f557f | 1125 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1126 | spin_unlock(&inode->i_lock); |
870a5be8 | 1127 | return status; |
decf491f TM |
1128 | } |
1129 | ||
70ca8852 TM |
1130 | /** |
1131 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1132 | * @inode - pointer to inode | |
1133 | * @fattr - updated attributes | |
1134 | * | |
1135 | * After an operation that has changed the inode metadata, mark the | |
1136 | * attribute cache as being invalid, then try to update it. Fake up | |
1137 | * weak cache consistency data, if none exist. | |
1138 | * | |
1139 | * This function is mainly designed to be used by the ->write_done() functions. | |
1140 | */ | |
1141 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1142 | { | |
d65f557f TM |
1143 | int status; |
1144 | ||
1145 | spin_lock(&inode->i_lock); | |
1146 | /* Don't do a WCC update if these attributes are already stale */ | |
1147 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1148 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1149 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1150 | | NFS_ATTR_FATTR_PRESIZE | |
1151 | | NFS_ATTR_FATTR_PREMTIME | |
1152 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1153 | goto out_noforce; |
1154 | } | |
9e6e70f8 TM |
1155 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1156 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
70ca8852 | 1157 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
9e6e70f8 | 1158 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1159 | } |
9e6e70f8 TM |
1160 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1161 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1162 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1163 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1164 | } | |
1165 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1166 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1167 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1168 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1169 | } | |
1170 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1171 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1172 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1173 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1174 | } |
d65f557f TM |
1175 | out_noforce: |
1176 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1177 | spin_unlock(&inode->i_lock); | |
1178 | return status; | |
70ca8852 TM |
1179 | } |
1180 | ||
1da177e4 LT |
1181 | /* |
1182 | * Many nfs protocol calls return the new file attributes after | |
1183 | * an operation. Here we update the inode to reflect the state | |
1184 | * of the server's inode. | |
1185 | * | |
1186 | * This is a bit tricky because we have to make sure all dirty pages | |
1187 | * have been sent off to the server before calling invalidate_inode_pages. | |
1188 | * To make sure no other process adds more write requests while we try | |
1189 | * our best to flush them, we make them sleep during the attribute refresh. | |
1190 | * | |
1191 | * A very similar scenario holds for the dir cache. | |
1192 | */ | |
24aa1fe6 | 1193 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1194 | { |
8b4bdcf8 | 1195 | struct nfs_server *server; |
1da177e4 | 1196 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1197 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1198 | unsigned long invalid = 0; |
3e7d950a | 1199 | unsigned long now = jiffies; |
62ab460c | 1200 | unsigned long save_cache_validity; |
1da177e4 LT |
1201 | |
1202 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
3110ff80 | 1203 | __func__, inode->i_sb->s_id, inode->i_ino, |
1da177e4 LT |
1204 | atomic_read(&inode->i_count), fattr->valid); |
1205 | ||
9e6e70f8 | 1206 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
325cfed9 | 1207 | goto out_fileid; |
1da177e4 LT |
1208 | |
1209 | /* | |
1210 | * Make sure the inode's type hasn't changed. | |
1211 | */ | |
9e6e70f8 | 1212 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1213 | goto out_changed; |
1214 | ||
8b4bdcf8 | 1215 | server = NFS_SERVER(inode); |
a0356862 | 1216 | /* Update the fsid? */ |
9e6e70f8 | 1217 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1218 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1219 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1220 | server->fsid = fattr->fsid; |
1221 | ||
1da177e4 LT |
1222 | /* |
1223 | * Update the read time so we don't revalidate too often. | |
1224 | */ | |
33801147 | 1225 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1226 | |
62ab460c TM |
1227 | save_cache_validity = nfsi->cache_validity; |
1228 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1229 | | NFS_INO_INVALID_ATIME | |
1230 | | NFS_INO_REVAL_FORCED | |
1231 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1232 | |
a895b4a1 | 1233 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1234 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1235 | |
47aabaa7 | 1236 | /* More cache consistency checks */ |
9e6e70f8 TM |
1237 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
1238 | if (nfsi->change_attr != fattr->change_attr) { | |
1239 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
1240 | inode->i_sb->s_id, inode->i_ino); | |
1241 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1242 | if (S_ISDIR(inode->i_mode)) | |
1243 | nfs_force_lookup_revalidate(inode); | |
1244 | nfsi->change_attr = fattr->change_attr; | |
1245 | } | |
62ab460c TM |
1246 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1247 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1248 | |
1249 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
47aabaa7 TM |
1250 | /* NFSv2/v3: Check if the mtime agrees */ |
1251 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { | |
1252 | dprintk("NFS: mtime change on server for file %s/%ld\n", | |
1253 | inode->i_sb->s_id, inode->i_ino); | |
1254 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
bfc69a45 TM |
1255 | if (S_ISDIR(inode->i_mode)) |
1256 | nfs_force_lookup_revalidate(inode); | |
9e6e70f8 | 1257 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
47aabaa7 | 1258 | } |
62ab460c TM |
1259 | } else if (server->caps & NFS_CAP_MTIME) |
1260 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1261 | | NFS_INO_INVALID_DATA | |
1262 | | NFS_INO_REVAL_PAGECACHE | |
1263 | | NFS_INO_REVAL_FORCED); | |
1264 | ||
9e6e70f8 | 1265 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
47aabaa7 | 1266 | /* If ctime has changed we should definitely clear access+acl caches */ |
37d9d76d | 1267 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
4704f0e2 | 1268 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
37d9d76d N |
1269 | /* and probably clear data for a directory too as utimes can cause |
1270 | * havoc with our cache. | |
1271 | */ | |
1272 | if (S_ISDIR(inode->i_mode)) { | |
1273 | invalid |= NFS_INO_INVALID_DATA; | |
1274 | nfs_force_lookup_revalidate(inode); | |
1275 | } | |
9e6e70f8 | 1276 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
37d9d76d | 1277 | } |
62ab460c TM |
1278 | } else if (server->caps & NFS_CAP_CTIME) |
1279 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1280 | | NFS_INO_INVALID_ACCESS | |
1281 | | NFS_INO_INVALID_ACL | |
1282 | | NFS_INO_REVAL_FORCED); | |
47aabaa7 | 1283 | |
951a143b | 1284 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1285 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1286 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1287 | cur_isize = i_size_read(inode); | |
1288 | if (new_isize != cur_isize) { | |
1289 | /* Do we perhaps have any outstanding writes, or has | |
1290 | * the file grown beyond our last write? */ | |
1291 | if (nfsi->npages == 0 || new_isize > cur_isize) { | |
1292 | i_size_write(inode, new_isize); | |
1293 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1294 | } | |
1295 | dprintk("NFS: isize change on server for file %s/%ld\n", | |
1296 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 | 1297 | } |
62ab460c TM |
1298 | } else |
1299 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1300 | | NFS_INO_REVAL_PAGECACHE | |
1301 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1302 | |
1da177e4 | 1303 | |
9e6e70f8 TM |
1304 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1305 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1306 | else if (server->caps & NFS_CAP_ATIME) |
1307 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1308 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1309 | |
9e6e70f8 TM |
1310 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1311 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1312 | umode_t newmode = inode->i_mode & S_IFMT; |
1313 | newmode |= fattr->mode & S_IALLUGO; | |
1314 | inode->i_mode = newmode; | |
9e6e70f8 | 1315 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1316 | } |
62ab460c TM |
1317 | } else if (server->caps & NFS_CAP_MODE) |
1318 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1319 | | NFS_INO_INVALID_ACCESS | |
1320 | | NFS_INO_INVALID_ACL | |
1321 | | NFS_INO_REVAL_FORCED); | |
1322 | ||
9e6e70f8 TM |
1323 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1324 | if (inode->i_uid != fattr->uid) { | |
1325 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1326 | inode->i_uid = fattr->uid; | |
1327 | } | |
62ab460c TM |
1328 | } else if (server->caps & NFS_CAP_OWNER) |
1329 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1330 | | NFS_INO_INVALID_ACCESS | |
1331 | | NFS_INO_INVALID_ACL | |
1332 | | NFS_INO_REVAL_FORCED); | |
1333 | ||
9e6e70f8 TM |
1334 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1335 | if (inode->i_gid != fattr->gid) { | |
1336 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1337 | inode->i_gid = fattr->gid; | |
1338 | } | |
62ab460c TM |
1339 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1340 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1341 | | NFS_INO_INVALID_ACCESS | |
1342 | | NFS_INO_INVALID_ACL | |
1343 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1344 | |
9e6e70f8 TM |
1345 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1346 | if (inode->i_nlink != fattr->nlink) { | |
1347 | invalid |= NFS_INO_INVALID_ATTR; | |
1348 | if (S_ISDIR(inode->i_mode)) | |
1349 | invalid |= NFS_INO_INVALID_DATA; | |
1350 | inode->i_nlink = fattr->nlink; | |
1351 | } | |
62ab460c TM |
1352 | } else if (server->caps & NFS_CAP_NLINK) |
1353 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1354 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1355 | |
9e6e70f8 | 1356 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1357 | /* |
1358 | * report the blocks in 512byte units | |
1359 | */ | |
1360 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1361 | } |
9e6e70f8 TM |
1362 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1363 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1364 | |
1365 | /* Update attrtimeo value if we're out of the unstable period */ | |
1366 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1367 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1368 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1369 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1370 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1371 | } else { |
64672d55 | 1372 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1373 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1374 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1375 | nfsi->attrtimeo_timestamp = now; | |
1376 | } | |
1da177e4 | 1377 | } |
f2115dc9 | 1378 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1379 | /* Don't invalidate the data if we were to blame */ |
1380 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1381 | || S_ISLNK(inode->i_mode))) | |
1382 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce | 1383 | if (!nfs_have_delegation(inode, FMODE_READ) || |
62ab460c | 1384 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1385 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1386 | |
1387 | return 0; | |
1388 | out_changed: | |
1389 | /* | |
1390 | * Big trouble! The inode has become a different object. | |
1391 | */ | |
1da177e4 | 1392 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
3110ff80 | 1393 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
b37b03b7 | 1394 | out_err: |
1da177e4 LT |
1395 | /* |
1396 | * No need to worry about unhashing the dentry, as the | |
1397 | * lookup validation will know that the inode is bad. | |
1398 | * (But we fall through to invalidate the caches.) | |
1399 | */ | |
1400 | nfs_invalidate_inode(inode); | |
1da177e4 | 1401 | return -ESTALE; |
325cfed9 CL |
1402 | |
1403 | out_fileid: | |
1404 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1405 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
54ceac45 | 1406 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
325cfed9 CL |
1407 | (long long)nfsi->fileid, (long long)fattr->fileid); |
1408 | goto out_err; | |
1da177e4 LT |
1409 | } |
1410 | ||
55a97593 | 1411 | |
1da177e4 LT |
1412 | #ifdef CONFIG_NFS_V4 |
1413 | ||
1da177e4 LT |
1414 | /* |
1415 | * Clean out any remaining NFSv4 state that might be left over due | |
1416 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1417 | * nfs_open(). | |
1418 | */ | |
b57922d9 | 1419 | void nfs4_evict_inode(struct inode *inode) |
1da177e4 | 1420 | { |
4541d16c | 1421 | pnfs_destroy_layout(NFS_I(inode)); |
b57922d9 AV |
1422 | truncate_inode_pages(&inode->i_data, 0); |
1423 | end_writeback(inode); | |
1da177e4 | 1424 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1425 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1426 | /* First call standard NFS clear_inode() code */ |
1427 | nfs_clear_inode(inode); | |
1da177e4 | 1428 | } |
1da177e4 LT |
1429 | #endif |
1430 | ||
f7b422b1 | 1431 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1432 | { |
1433 | struct nfs_inode *nfsi; | |
e94b1766 | 1434 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1435 | if (!nfsi) |
1436 | return NULL; | |
55296809 CL |
1437 | nfsi->flags = 0UL; |
1438 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1439 | #ifdef CONFIG_NFS_V3_ACL |
1440 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1441 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1442 | #endif | |
e50a1c2e BF |
1443 | #ifdef CONFIG_NFS_V4 |
1444 | nfsi->nfs4_acl = NULL; | |
1445 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1446 | return &nfsi->vfs_inode; |
1447 | } | |
1448 | ||
fa0d7e3d | 1449 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1450 | { |
fa0d7e3d NP |
1451 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1452 | INIT_LIST_HEAD(&inode->i_dentry); | |
1da177e4 LT |
1453 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1454 | } | |
1455 | ||
fa0d7e3d NP |
1456 | void nfs_destroy_inode(struct inode *inode) |
1457 | { | |
1458 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1459 | } | |
1460 | ||
d75d5414 AM |
1461 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1462 | { | |
1463 | #ifdef CONFIG_NFS_V4 | |
1464 | INIT_LIST_HEAD(&nfsi->open_states); | |
1465 | nfsi->delegation = NULL; | |
1466 | nfsi->delegation_state = 0; | |
1467 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1468 | nfsi->layout = NULL; |
d75d5414 AM |
1469 | #endif |
1470 | } | |
f7b422b1 | 1471 | |
51cc5068 | 1472 | static void init_once(void *foo) |
1da177e4 LT |
1473 | { |
1474 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1475 | ||
a35afb83 | 1476 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1477 | INIT_LIST_HEAD(&nfsi->open_files); |
1478 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1479 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
1480 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
a35afb83 | 1481 | nfsi->npages = 0; |
ff778d02 | 1482 | nfsi->ncommit = 0; |
565277f6 TM |
1483 | atomic_set(&nfsi->silly_count, 1); |
1484 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1485 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1486 | nfs4_init_once(nfsi); |
1da177e4 | 1487 | } |
20c2df83 | 1488 | |
f7b422b1 | 1489 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1490 | { |
1491 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1492 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1493 | 0, (SLAB_RECLAIM_ACCOUNT| |
1494 | SLAB_MEM_SPREAD), | |
20c2df83 | 1495 | init_once); |
1da177e4 LT |
1496 | if (nfs_inode_cachep == NULL) |
1497 | return -ENOMEM; | |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | ||
266bee88 | 1502 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1503 | { |
1a1d92c1 | 1504 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1505 | } |
1506 | ||
5746006f TM |
1507 | struct workqueue_struct *nfsiod_workqueue; |
1508 | ||
1509 | /* | |
1510 | * start up the nfsiod workqueue | |
1511 | */ | |
1512 | static int nfsiod_start(void) | |
1513 | { | |
1514 | struct workqueue_struct *wq; | |
1515 | dprintk("RPC: creating workqueue nfsiod\n"); | |
60958892 | 1516 | wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0); |
5746006f TM |
1517 | if (wq == NULL) |
1518 | return -ENOMEM; | |
1519 | nfsiod_workqueue = wq; | |
1520 | return 0; | |
1521 | } | |
1522 | ||
1523 | /* | |
1524 | * Destroy the nfsiod workqueue | |
1525 | */ | |
1526 | static void nfsiod_stop(void) | |
1527 | { | |
1528 | struct workqueue_struct *wq; | |
1529 | ||
1530 | wq = nfsiod_workqueue; | |
1531 | if (wq == NULL) | |
1532 | return; | |
1533 | nfsiod_workqueue = NULL; | |
1534 | destroy_workqueue(wq); | |
1535 | } | |
1536 | ||
1da177e4 LT |
1537 | /* |
1538 | * Initialize NFS | |
1539 | */ | |
1540 | static int __init init_nfs_fs(void) | |
1541 | { | |
1542 | int err; | |
1543 | ||
955a857e BS |
1544 | err = nfs_idmap_init(); |
1545 | if (err < 0) | |
1546 | goto out9; | |
1547 | ||
e571cbf1 TM |
1548 | err = nfs_dns_resolver_init(); |
1549 | if (err < 0) | |
1550 | goto out8; | |
1551 | ||
8ec442ae DH |
1552 | err = nfs_fscache_register(); |
1553 | if (err < 0) | |
1554 | goto out7; | |
1555 | ||
5746006f TM |
1556 | err = nfsiod_start(); |
1557 | if (err) | |
1558 | goto out6; | |
1559 | ||
6aaca566 DH |
1560 | err = nfs_fs_proc_init(); |
1561 | if (err) | |
1562 | goto out5; | |
1563 | ||
1da177e4 LT |
1564 | err = nfs_init_nfspagecache(); |
1565 | if (err) | |
1566 | goto out4; | |
1567 | ||
1568 | err = nfs_init_inodecache(); | |
1569 | if (err) | |
1570 | goto out3; | |
1571 | ||
1572 | err = nfs_init_readpagecache(); | |
1573 | if (err) | |
1574 | goto out2; | |
1575 | ||
1576 | err = nfs_init_writepagecache(); | |
1577 | if (err) | |
1578 | goto out1; | |
1579 | ||
1da177e4 LT |
1580 | err = nfs_init_directcache(); |
1581 | if (err) | |
1582 | goto out0; | |
1da177e4 LT |
1583 | |
1584 | #ifdef CONFIG_PROC_FS | |
1585 | rpc_proc_register(&nfs_rpcstat); | |
1586 | #endif | |
f7b422b1 | 1587 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1588 | goto out; |
1589 | return 0; | |
1590 | out: | |
1591 | #ifdef CONFIG_PROC_FS | |
1592 | rpc_proc_unregister("nfs"); | |
1593 | #endif | |
1da177e4 | 1594 | nfs_destroy_directcache(); |
6b59a754 | 1595 | out0: |
6b59a754 | 1596 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1597 | out1: |
1598 | nfs_destroy_readpagecache(); | |
1599 | out2: | |
1600 | nfs_destroy_inodecache(); | |
1601 | out3: | |
1602 | nfs_destroy_nfspagecache(); | |
1603 | out4: | |
6aaca566 DH |
1604 | nfs_fs_proc_exit(); |
1605 | out5: | |
5746006f TM |
1606 | nfsiod_stop(); |
1607 | out6: | |
8ec442ae DH |
1608 | nfs_fscache_unregister(); |
1609 | out7: | |
e571cbf1 TM |
1610 | nfs_dns_resolver_destroy(); |
1611 | out8: | |
955a857e BS |
1612 | nfs_idmap_quit(); |
1613 | out9: | |
1da177e4 LT |
1614 | return err; |
1615 | } | |
1616 | ||
1617 | static void __exit exit_nfs_fs(void) | |
1618 | { | |
1da177e4 | 1619 | nfs_destroy_directcache(); |
1da177e4 LT |
1620 | nfs_destroy_writepagecache(); |
1621 | nfs_destroy_readpagecache(); | |
1622 | nfs_destroy_inodecache(); | |
1623 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1624 | nfs_fscache_unregister(); |
e571cbf1 | 1625 | nfs_dns_resolver_destroy(); |
955a857e | 1626 | nfs_idmap_quit(); |
1da177e4 LT |
1627 | #ifdef CONFIG_PROC_FS |
1628 | rpc_proc_unregister("nfs"); | |
1629 | #endif | |
f4eecd5d | 1630 | nfs_cleanup_cb_ident_idr(); |
f7b422b1 | 1631 | unregister_nfs_fs(); |
6aaca566 | 1632 | nfs_fs_proc_exit(); |
5746006f | 1633 | nfsiod_stop(); |
1da177e4 LT |
1634 | } |
1635 | ||
1636 | /* Not quite true; I just maintain it */ | |
1637 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1638 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1639 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1640 | |
1641 | module_init(init_nfs_fs) | |
1642 | module_exit(exit_nfs_fs) |