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Commit | Line | Data |
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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> |
3fa0b4e2 | 40 | #include <linux/compat.h> |
1da177e4 LT |
41 | |
42 | #include <asm/system.h> | |
43 | #include <asm/uaccess.h> | |
44 | ||
4ce79717 | 45 | #include "nfs4_fs.h" |
a72b4422 | 46 | #include "callback.h" |
1da177e4 | 47 | #include "delegation.h" |
d9ef5a8c | 48 | #include "iostat.h" |
f7b422b1 | 49 | #include "internal.h" |
8ec442ae | 50 | #include "fscache.h" |
e571cbf1 | 51 | #include "dns_resolve.h" |
e5e94017 | 52 | #include "pnfs.h" |
1da177e4 LT |
53 | |
54 | #define NFSDBG_FACILITY NFSDBG_VFS | |
1da177e4 | 55 | |
f43bf0be TM |
56 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
57 | ||
58 | /* Default is to see 64-bit inode numbers */ | |
59 | static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; | |
60 | ||
1da177e4 | 61 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 62 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 63 | |
e18b890b | 64 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 65 | |
1da177e4 LT |
66 | static inline unsigned long |
67 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
68 | { | |
69 | return nfs_fileid_to_ino_t(fattr->fileid); | |
70 | } | |
71 | ||
72cb77f4 TM |
72 | /** |
73 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
74 | * @word: long word containing the bit lock | |
75 | */ | |
76 | int nfs_wait_bit_killable(void *word) | |
77 | { | |
78 | if (fatal_signal_pending(current)) | |
79 | return -ERESTARTSYS; | |
80 | schedule(); | |
81 | return 0; | |
82 | } | |
83 | ||
f43bf0be TM |
84 | /** |
85 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
86 | * @fileid: 64-bit fileid | |
87 | * | |
88 | * This function returns a 32-bit inode number if the boot parameter | |
89 | * nfs.enable_ino64 is zero. | |
90 | */ | |
91 | u64 nfs_compat_user_ino64(u64 fileid) | |
92 | { | |
3fa0b4e2 FF |
93 | #ifdef CONFIG_COMPAT |
94 | compat_ulong_t ino; | |
95 | #else | |
96 | unsigned long ino; | |
97 | #endif | |
f43bf0be TM |
98 | |
99 | if (enable_ino64) | |
100 | return fileid; | |
101 | ino = fileid; | |
102 | if (sizeof(ino) < sizeof(fileid)) | |
103 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
104 | return ino; | |
105 | } | |
106 | ||
b57922d9 | 107 | static void nfs_clear_inode(struct inode *inode) |
1da177e4 | 108 | { |
da6d503a TM |
109 | /* |
110 | * The following should never happen... | |
111 | */ | |
112 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 113 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 114 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 115 | nfs_access_zap_cache(inode); |
ef79c097 | 116 | nfs_fscache_release_inode_cookie(inode); |
1da177e4 LT |
117 | } |
118 | ||
b57922d9 AV |
119 | void nfs_evict_inode(struct inode *inode) |
120 | { | |
121 | truncate_inode_pages(&inode->i_data, 0); | |
122 | end_writeback(inode); | |
123 | nfs_clear_inode(inode); | |
124 | } | |
125 | ||
29884df0 TM |
126 | /** |
127 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
128 | */ | |
129 | int nfs_sync_mapping(struct address_space *mapping) | |
130 | { | |
5cf95214 | 131 | int ret = 0; |
29884df0 | 132 | |
5cf95214 TM |
133 | if (mapping->nrpages != 0) { |
134 | unmap_mapping_range(mapping, 0, 0, 0); | |
135 | ret = nfs_wb_all(mapping->host); | |
136 | } | |
29884df0 TM |
137 | return ret; |
138 | } | |
139 | ||
1da177e4 LT |
140 | /* |
141 | * Invalidate the local caches | |
142 | */ | |
b37b03b7 | 143 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
144 | { |
145 | struct nfs_inode *nfsi = NFS_I(inode); | |
146 | int mode = inode->i_mode; | |
147 | ||
91d5b470 CL |
148 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
149 | ||
c7c20973 TM |
150 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
151 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 LT |
152 | |
153 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
154 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 155 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 156 | else |
55296809 | 157 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 158 | } |
dc59250c | 159 | |
b37b03b7 TM |
160 | void nfs_zap_caches(struct inode *inode) |
161 | { | |
162 | spin_lock(&inode->i_lock); | |
163 | nfs_zap_caches_locked(inode); | |
dc59250c | 164 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
165 | } |
166 | ||
cd9ae2b6 TM |
167 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
168 | { | |
169 | if (mapping->nrpages != 0) { | |
170 | spin_lock(&inode->i_lock); | |
171 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
172 | spin_unlock(&inode->i_lock); | |
173 | } | |
174 | } | |
175 | ||
f41f7418 | 176 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
177 | { |
178 | void (*clear_acl_cache)(struct inode *); | |
179 | ||
180 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
181 | if (clear_acl_cache != NULL) | |
182 | clear_acl_cache(inode); | |
dc59250c | 183 | spin_lock(&inode->i_lock); |
55296809 | 184 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 185 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
186 | } |
187 | ||
c4812998 TM |
188 | void nfs_invalidate_atime(struct inode *inode) |
189 | { | |
190 | spin_lock(&inode->i_lock); | |
191 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
192 | spin_unlock(&inode->i_lock); | |
193 | } | |
194 | ||
1da177e4 | 195 | /* |
b37b03b7 TM |
196 | * Invalidate, but do not unhash, the inode. |
197 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 198 | */ |
b37b03b7 | 199 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 200 | { |
3a10c30a | 201 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 202 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
203 | } |
204 | ||
205 | struct nfs_find_desc { | |
206 | struct nfs_fh *fh; | |
207 | struct nfs_fattr *fattr; | |
208 | }; | |
209 | ||
210 | /* | |
211 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
212 | * this, and re-exported directories (also seen in NFSv2) | |
213 | * we are forced to allow 2 different inodes to have the same | |
214 | * i_ino. | |
215 | */ | |
216 | static int | |
217 | nfs_find_actor(struct inode *inode, void *opaque) | |
218 | { | |
219 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
220 | struct nfs_fh *fh = desc->fh; | |
221 | struct nfs_fattr *fattr = desc->fattr; | |
222 | ||
223 | if (NFS_FILEID(inode) != fattr->fileid) | |
224 | return 0; | |
225 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
226 | return 0; | |
227 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
228 | return 0; | |
229 | return 1; | |
230 | } | |
231 | ||
232 | static int | |
233 | nfs_init_locked(struct inode *inode, void *opaque) | |
234 | { | |
235 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
236 | struct nfs_fattr *fattr = desc->fattr; | |
237 | ||
99fadcd7 | 238 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
239 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
240 | return 0; | |
241 | } | |
242 | ||
1da177e4 LT |
243 | /* |
244 | * This is our front-end to iget that looks up inodes by file handle | |
245 | * instead of inode number. | |
246 | */ | |
247 | struct inode * | |
248 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
249 | { | |
250 | struct nfs_find_desc desc = { | |
251 | .fh = fh, | |
252 | .fattr = fattr | |
253 | }; | |
03f28e3a | 254 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
255 | unsigned long hash; |
256 | ||
7ebb9315 BS |
257 | nfs_attr_check_mountpoint(sb, fattr); |
258 | ||
533eb461 AA |
259 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
260 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 261 | goto out_no_inode; |
9e6e70f8 | 262 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 263 | goto out_no_inode; |
1da177e4 LT |
264 | |
265 | hash = nfs_fattr_to_ino_t(fattr); | |
266 | ||
03f28e3a TM |
267 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
268 | if (inode == NULL) { | |
269 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 270 | goto out_no_inode; |
03f28e3a | 271 | } |
1da177e4 LT |
272 | |
273 | if (inode->i_state & I_NEW) { | |
274 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 275 | unsigned long now = jiffies; |
1da177e4 LT |
276 | |
277 | /* We set i_ino for the few things that still rely on it, | |
278 | * such as stat(2) */ | |
279 | inode->i_ino = hash; | |
280 | ||
281 | /* We can't support update_atime(), since the server will reset it */ | |
282 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
283 | inode->i_mode = fattr->mode; | |
62ab460c TM |
284 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
285 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
286 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
287 | | NFS_INO_INVALID_ACCESS | |
288 | | NFS_INO_INVALID_ACL; | |
1da177e4 LT |
289 | /* Why so? Because we want revalidate for devices/FIFOs, and |
290 | * that's precisely what we have in nfs_file_inode_operations. | |
291 | */ | |
8fa5c000 | 292 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 LT |
293 | if (S_ISREG(inode->i_mode)) { |
294 | inode->i_fop = &nfs_file_operations; | |
295 | inode->i_data.a_ops = &nfs_file_aops; | |
296 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
297 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 298 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 299 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 300 | inode->i_data.a_ops = &nfs_dir_aops; |
0715dc63 | 301 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)) |
3a10c30a | 302 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
55a97593 | 303 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
304 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
305 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
306 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
307 | inode->i_op = &nfs_referral_inode_operations; | |
308 | else | |
309 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 310 | inode->i_fop = NULL; |
36d43a43 | 311 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 312 | } |
1da177e4 LT |
313 | } else if (S_ISLNK(inode->i_mode)) |
314 | inode->i_op = &nfs_symlink_inode_operations; | |
315 | else | |
316 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
317 | ||
9e6e70f8 TM |
318 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
319 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
320 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
321 | nfsi->change_attr = 0; | |
322 | inode->i_size = 0; | |
323 | inode->i_nlink = 0; | |
324 | inode->i_uid = -2; | |
325 | inode->i_gid = -2; | |
326 | inode->i_blocks = 0; | |
327 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
328 | ||
33801147 | 329 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 330 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
331 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
332 | inode->i_atime = fattr->atime; | |
62ab460c TM |
333 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
334 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
335 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
336 | inode->i_mtime = fattr->mtime; | |
62ab460c TM |
337 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
338 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
339 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
340 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
341 | inode->i_ctime = fattr->ctime; | |
62ab460c TM |
342 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
343 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
344 | | NFS_INO_INVALID_ACCESS | |
345 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 | 346 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
1da177e4 | 347 | nfsi->change_attr = fattr->change_attr; |
62ab460c TM |
348 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
349 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
350 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
351 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
352 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
353 | else |
354 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
355 | | NFS_INO_INVALID_DATA | |
356 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
357 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
358 | inode->i_nlink = fattr->nlink; | |
62ab460c TM |
359 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
360 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
361 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
362 | inode->i_uid = fattr->uid; | |
62ab460c TM |
363 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
364 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
365 | | NFS_INO_INVALID_ACCESS | |
366 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
367 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
368 | inode->i_gid = fattr->gid; | |
62ab460c TM |
369 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
370 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
371 | | NFS_INO_INVALID_ACCESS | |
372 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
373 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
374 | inode->i_blocks = fattr->du.nfs2.blocks; | |
375 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
376 | /* |
377 | * report the blocks in 512byte units | |
378 | */ | |
379 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
380 | } |
381 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 382 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 383 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 384 | |
ef79c097 DH |
385 | nfs_fscache_init_inode_cookie(inode); |
386 | ||
1da177e4 LT |
387 | unlock_new_inode(inode); |
388 | } else | |
389 | nfs_refresh_inode(inode, fattr); | |
390 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
391 | inode->i_sb->s_id, | |
392 | (long long)NFS_FILEID(inode), | |
393 | atomic_read(&inode->i_count)); | |
394 | ||
395 | out: | |
396 | return inode; | |
397 | ||
398 | out_no_inode: | |
03f28e3a | 399 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
400 | goto out; |
401 | } | |
402 | ||
659bfcd6 | 403 | #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 |
404 | |
405 | int | |
406 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
407 | { | |
408 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
409 | struct nfs_fattr *fattr; |
410 | int error = -ENOMEM; | |
1da177e4 | 411 | |
91d5b470 CL |
412 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
413 | ||
188b95dd JL |
414 | /* skip mode change if it's just for clearing setuid/setgid */ |
415 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
416 | attr->ia_valid &= ~ATTR_MODE; | |
417 | ||
1da177e4 LT |
418 | if (attr->ia_valid & ATTR_SIZE) { |
419 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
420 | attr->ia_valid &= ~ATTR_SIZE; | |
421 | } | |
422 | ||
423 | /* Optimization: if the end result is no change, don't RPC */ | |
424 | attr->ia_valid &= NFS_VALID_ATTRS; | |
659bfcd6 | 425 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
1da177e4 LT |
426 | return 0; |
427 | ||
755c1e20 | 428 | /* Write all dirty data */ |
1b924e5f | 429 | if (S_ISREG(inode->i_mode)) |
e1552e19 | 430 | nfs_wb_all(inode); |
987f8dfc TM |
431 | |
432 | fattr = nfs_alloc_fattr(); | |
433 | if (fattr == NULL) | |
434 | goto out; | |
642ac549 TM |
435 | /* |
436 | * Return any delegations if we're going to change ACLs | |
437 | */ | |
438 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
439 | nfs_inode_return_delegation(inode); | |
987f8dfc | 440 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 441 | if (error == 0) |
987f8dfc TM |
442 | nfs_refresh_inode(inode, fattr); |
443 | nfs_free_fattr(fattr); | |
444 | out: | |
65e4308d TM |
445 | return error; |
446 | } | |
447 | ||
a3d01454 TM |
448 | /** |
449 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
450 | * @inode: inode of the file used | |
451 | * @offset: file offset to start truncating | |
452 | * | |
453 | * This is a copy of the common vmtruncate, but with the locking | |
454 | * corrected to take into account the fact that NFS requires | |
455 | * inode->i_size to be updated under the inode->i_lock. | |
456 | */ | |
457 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
458 | { | |
c08d3b0e | 459 | loff_t oldsize; |
460 | int err; | |
a3d01454 | 461 | |
c08d3b0e | 462 | err = inode_newsize_ok(inode, offset); |
463 | if (err) | |
464 | goto out; | |
a3d01454 | 465 | |
c08d3b0e | 466 | spin_lock(&inode->i_lock); |
467 | oldsize = inode->i_size; | |
468 | i_size_write(inode, offset); | |
469 | spin_unlock(&inode->i_lock); | |
470 | ||
471 | truncate_pagecache(inode, oldsize, offset); | |
472 | out: | |
473 | return err; | |
a3d01454 TM |
474 | } |
475 | ||
65e4308d TM |
476 | /** |
477 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
478 | * @inode: pointer to struct inode | |
479 | * @attr: pointer to struct iattr | |
480 | * | |
481 | * Note: we do this in the *proc.c in order to ensure that | |
482 | * it works for things like exclusive creates too. | |
483 | */ | |
484 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
485 | { | |
486 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 487 | spin_lock(&inode->i_lock); |
1da177e4 | 488 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
489 | int mode = attr->ia_mode & S_IALLUGO; |
490 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
491 | inode->i_mode = mode; |
492 | } | |
493 | if ((attr->ia_valid & ATTR_UID) != 0) | |
494 | inode->i_uid = attr->ia_uid; | |
495 | if ((attr->ia_valid & ATTR_GID) != 0) | |
496 | inode->i_gid = attr->ia_gid; | |
55296809 | 497 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 498 | spin_unlock(&inode->i_lock); |
65e4308d TM |
499 | } |
500 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 501 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 502 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 503 | } |
1da177e4 LT |
504 | } |
505 | ||
1da177e4 LT |
506 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
507 | { | |
508 | struct inode *inode = dentry->d_inode; | |
55296809 | 509 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
510 | int err; |
511 | ||
acdc53b2 | 512 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 513 | if (S_ISREG(inode->i_mode)) { |
acdc53b2 TM |
514 | err = filemap_write_and_wait(inode->i_mapping); |
515 | if (err) | |
516 | goto out; | |
28c494c5 | 517 | } |
fc33a7bb CH |
518 | |
519 | /* | |
520 | * We may force a getattr if the user cares about atime. | |
521 | * | |
522 | * Note that we only have to check the vfsmount flags here: | |
523 | * - NFS always sets S_NOATIME by so checking it would give a | |
524 | * bogus result | |
525 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
526 | * no point in checking those. | |
527 | */ | |
528 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
529 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 530 | need_atime = 0; |
fc33a7bb | 531 | |
1da177e4 LT |
532 | if (need_atime) |
533 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
534 | else | |
535 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 536 | if (!err) { |
1da177e4 | 537 | generic_fillattr(inode, stat); |
f43bf0be | 538 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 539 | } |
acdc53b2 | 540 | out: |
1da177e4 LT |
541 | return err; |
542 | } | |
543 | ||
f11ac8db TM |
544 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
545 | { | |
546 | atomic_set(&l_ctx->count, 1); | |
547 | l_ctx->lockowner = current->files; | |
548 | l_ctx->pid = current->tgid; | |
549 | INIT_LIST_HEAD(&l_ctx->list); | |
550 | } | |
551 | ||
552 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
553 | { | |
554 | struct nfs_lock_context *pos; | |
555 | ||
556 | list_for_each_entry(pos, &ctx->lock_context.list, list) { | |
557 | if (pos->lockowner != current->files) | |
558 | continue; | |
559 | if (pos->pid != current->tgid) | |
560 | continue; | |
561 | atomic_inc(&pos->count); | |
562 | return pos; | |
563 | } | |
564 | return NULL; | |
565 | } | |
566 | ||
567 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
568 | { | |
569 | struct nfs_lock_context *res, *new = NULL; | |
570 | struct inode *inode = ctx->path.dentry->d_inode; | |
571 | ||
572 | spin_lock(&inode->i_lock); | |
573 | res = __nfs_find_lock_context(ctx); | |
574 | if (res == NULL) { | |
575 | spin_unlock(&inode->i_lock); | |
576 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
577 | if (new == NULL) | |
578 | return NULL; | |
579 | nfs_init_lock_context(new); | |
580 | spin_lock(&inode->i_lock); | |
581 | res = __nfs_find_lock_context(ctx); | |
582 | if (res == NULL) { | |
583 | list_add_tail(&new->list, &ctx->lock_context.list); | |
584 | new->open_context = ctx; | |
585 | res = new; | |
586 | new = NULL; | |
587 | } | |
588 | } | |
589 | spin_unlock(&inode->i_lock); | |
590 | kfree(new); | |
591 | return res; | |
592 | } | |
593 | ||
594 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
595 | { | |
596 | struct nfs_open_context *ctx = l_ctx->open_context; | |
597 | struct inode *inode = ctx->path.dentry->d_inode; | |
598 | ||
599 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
600 | return; | |
601 | list_del(&l_ctx->list); | |
602 | spin_unlock(&inode->i_lock); | |
603 | kfree(l_ctx); | |
604 | } | |
605 | ||
7fe5c398 TM |
606 | /** |
607 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
608 | * @ctx: pointer to context | |
609 | * @is_sync: is this a synchronous close | |
610 | * | |
611 | * always ensure that the attributes are up to date if we're mounted | |
612 | * with close-to-open semantics | |
613 | */ | |
614 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
615 | { | |
616 | struct inode *inode; | |
617 | struct nfs_server *server; | |
618 | ||
619 | if (!(ctx->mode & FMODE_WRITE)) | |
620 | return; | |
621 | if (!is_sync) | |
622 | return; | |
623 | inode = ctx->path.dentry->d_inode; | |
624 | if (!list_empty(&NFS_I(inode)->open_files)) | |
625 | return; | |
626 | server = NFS_SERVER(inode); | |
627 | if (server->flags & NFS_MOUNT_NOCTO) | |
628 | return; | |
629 | nfs_revalidate_inode(server, inode); | |
630 | } | |
631 | ||
cd9a1c0e | 632 | struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode) |
1da177e4 LT |
633 | { |
634 | struct nfs_open_context *ctx; | |
635 | ||
f52720ca | 636 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
1da177e4 | 637 | if (ctx != NULL) { |
6eae7974 AV |
638 | ctx->path = *path; |
639 | path_get(&ctx->path); | |
1da177e4 LT |
640 | ctx->cred = get_rpccred(cred); |
641 | ctx->state = NULL; | |
cd9a1c0e | 642 | ctx->mode = f_mode; |
66d3aac0 | 643 | ctx->flags = 0; |
1da177e4 | 644 | ctx->error = 0; |
f11ac8db TM |
645 | nfs_init_lock_context(&ctx->lock_context); |
646 | ctx->lock_context.open_context = ctx; | |
5c78f58e | 647 | INIT_LIST_HEAD(&ctx->list); |
1da177e4 LT |
648 | } |
649 | return ctx; | |
650 | } | |
651 | ||
652 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
653 | { | |
654 | if (ctx != NULL) | |
f11ac8db | 655 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
656 | return ctx; |
657 | } | |
658 | ||
7fe5c398 | 659 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 660 | { |
7fe5c398 | 661 | struct inode *inode = ctx->path.dentry->d_inode; |
3bec63db | 662 | |
5c78f58e | 663 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
664 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
665 | return; | |
666 | list_del(&ctx->list); | |
667 | spin_unlock(&inode->i_lock); | |
ef84303e | 668 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 669 | return; |
5c78f58e TM |
670 | if (inode != NULL) |
671 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
672 | if (ctx->cred != NULL) |
673 | put_rpccred(ctx->cred); | |
31f31db1 | 674 | path_put(&ctx->path); |
3bec63db TM |
675 | kfree(ctx); |
676 | } | |
677 | ||
a49c3c77 TM |
678 | void put_nfs_open_context(struct nfs_open_context *ctx) |
679 | { | |
680 | __put_nfs_open_context(ctx, 0); | |
681 | } | |
682 | ||
1da177e4 LT |
683 | /* |
684 | * Ensure that mmap has a recent RPC credential for use when writing out | |
685 | * shared pages | |
686 | */ | |
cd9a1c0e | 687 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 688 | { |
01cce933 | 689 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
690 | struct nfs_inode *nfsi = NFS_I(inode); |
691 | ||
692 | filp->private_data = get_nfs_open_context(ctx); | |
693 | spin_lock(&inode->i_lock); | |
694 | list_add(&ctx->list, &nfsi->open_files); | |
695 | spin_unlock(&inode->i_lock); | |
696 | } | |
697 | ||
d530838b TM |
698 | /* |
699 | * Given an inode, search for an open context with the desired characteristics | |
700 | */ | |
dc0b027d | 701 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
702 | { |
703 | struct nfs_inode *nfsi = NFS_I(inode); | |
704 | struct nfs_open_context *pos, *ctx = NULL; | |
705 | ||
706 | spin_lock(&inode->i_lock); | |
707 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
708 | if (cred != NULL && pos->cred != cred) |
709 | continue; | |
1544fa0f TM |
710 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
711 | continue; | |
712 | ctx = get_nfs_open_context(pos); | |
713 | break; | |
1da177e4 LT |
714 | } |
715 | spin_unlock(&inode->i_lock); | |
716 | return ctx; | |
717 | } | |
718 | ||
b92dccf6 | 719 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 720 | { |
01cce933 | 721 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 722 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
723 | |
724 | if (ctx) { | |
725 | filp->private_data = NULL; | |
726 | spin_lock(&inode->i_lock); | |
727 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
728 | spin_unlock(&inode->i_lock); | |
f895c53f | 729 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
730 | } |
731 | } | |
732 | ||
733 | /* | |
734 | * These allocate and release file read/write context information. | |
735 | */ | |
736 | int nfs_open(struct inode *inode, struct file *filp) | |
737 | { | |
738 | struct nfs_open_context *ctx; | |
739 | struct rpc_cred *cred; | |
740 | ||
98a8e323 | 741 | cred = rpc_lookup_cred(); |
1da177e4 LT |
742 | if (IS_ERR(cred)) |
743 | return PTR_ERR(cred); | |
cd9a1c0e | 744 | ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode); |
1da177e4 LT |
745 | put_rpccred(cred); |
746 | if (ctx == NULL) | |
747 | return -ENOMEM; | |
1da177e4 LT |
748 | nfs_file_set_open_context(filp, ctx); |
749 | put_nfs_open_context(ctx); | |
ef79c097 | 750 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
751 | return 0; |
752 | } | |
753 | ||
754 | int nfs_release(struct inode *inode, struct file *filp) | |
755 | { | |
1da177e4 LT |
756 | nfs_file_clear_open_context(filp); |
757 | return 0; | |
758 | } | |
759 | ||
760 | /* | |
761 | * This function is called whenever some part of NFS notices that | |
762 | * the cached attributes have to be refreshed. | |
763 | */ | |
764 | int | |
765 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
766 | { | |
767 | int status = -ESTALE; | |
a3cba2aa | 768 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 769 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
770 | |
771 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
772 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
773 | ||
85233a7a | 774 | if (is_bad_inode(inode)) |
691beb13 | 775 | goto out; |
1da177e4 | 776 | if (NFS_STALE(inode)) |
412d582e | 777 | goto out; |
7fdc49c4 | 778 | |
a3cba2aa TM |
779 | status = -ENOMEM; |
780 | fattr = nfs_alloc_fattr(); | |
781 | if (fattr == NULL) | |
782 | goto out; | |
783 | ||
691beb13 | 784 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
a3cba2aa | 785 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
1da177e4 LT |
786 | if (status != 0) { |
787 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
788 | inode->i_sb->s_id, | |
789 | (long long)NFS_FILEID(inode), status); | |
790 | if (status == -ESTALE) { | |
791 | nfs_zap_caches(inode); | |
792 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 793 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
794 | } |
795 | goto out; | |
796 | } | |
797 | ||
a3cba2aa | 798 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
799 | if (status) { |
800 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
801 | inode->i_sb->s_id, | |
802 | (long long)NFS_FILEID(inode), status); | |
803 | goto out; | |
804 | } | |
55296809 | 805 | |
24aa1fe6 | 806 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 807 | nfs_zap_acl_cache(inode); |
55296809 | 808 | |
1da177e4 LT |
809 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
810 | inode->i_sb->s_id, | |
811 | (long long)NFS_FILEID(inode)); | |
812 | ||
412d582e | 813 | out: |
a3cba2aa | 814 | nfs_free_fattr(fattr); |
1da177e4 LT |
815 | return status; |
816 | } | |
817 | ||
818 | int nfs_attribute_timeout(struct inode *inode) | |
819 | { | |
820 | struct nfs_inode *nfsi = NFS_I(inode); | |
821 | ||
d7cf8dd0 TM |
822 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
823 | } | |
824 | ||
825 | static int nfs_attribute_cache_expired(struct inode *inode) | |
826 | { | |
b4d2314b | 827 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 828 | return 0; |
d7cf8dd0 | 829 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
830 | } |
831 | ||
832 | /** | |
833 | * nfs_revalidate_inode - Revalidate the inode attributes | |
834 | * @server - pointer to nfs_server struct | |
835 | * @inode - pointer to inode struct | |
836 | * | |
837 | * Updates inode attribute information by retrieving the data from the server. | |
838 | */ | |
839 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
840 | { | |
44b11874 | 841 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
d7cf8dd0 | 842 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
843 | return NFS_STALE(inode) ? -ESTALE : 0; |
844 | return __nfs_revalidate_inode(server, inode); | |
845 | } | |
846 | ||
1cda707d | 847 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
848 | { |
849 | struct nfs_inode *nfsi = NFS_I(inode); | |
850 | ||
851 | if (mapping->nrpages != 0) { | |
852 | int ret = invalidate_inode_pages2(mapping); | |
853 | if (ret < 0) | |
854 | return ret; | |
855 | } | |
856 | spin_lock(&inode->i_lock); | |
857 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 858 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 859 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
860 | spin_unlock(&inode->i_lock); |
861 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 862 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
863 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
864 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
865 | return 0; | |
866 | } | |
867 | ||
717d44e8 TM |
868 | /** |
869 | * nfs_revalidate_mapping - Revalidate the pagecache | |
870 | * @inode - pointer to host inode | |
871 | * @mapping - pointer to mapping | |
717d44e8 TM |
872 | */ |
873 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
874 | { | |
875 | struct nfs_inode *nfsi = NFS_I(inode); | |
876 | int ret = 0; | |
dc59250c | 877 | |
717d44e8 | 878 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
d7cf8dd0 TM |
879 | || nfs_attribute_cache_expired(inode) |
880 | || NFS_STALE(inode)) { | |
717d44e8 TM |
881 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
882 | if (ret < 0) | |
883 | goto out; | |
7d52e862 | 884 | } |
717d44e8 TM |
885 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
886 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 887 | out: |
44b11874 | 888 | return ret; |
7d52e862 TM |
889 | } |
890 | ||
27dc1cd3 | 891 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
892 | { |
893 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 894 | unsigned long ret = 0; |
a895b4a1 | 895 | |
9e6e70f8 TM |
896 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
897 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
898 | && nfsi->change_attr == fattr->pre_change_attr) { | |
70ca8852 TM |
899 | nfsi->change_attr = fattr->change_attr; |
900 | if (S_ISDIR(inode->i_mode)) | |
901 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 902 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 903 | } |
a895b4a1 | 904 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
905 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
906 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
907 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
908 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
909 | ret |= NFS_INO_INVALID_ATTR; | |
910 | } | |
9e6e70f8 TM |
911 | |
912 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
913 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
914 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
915 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
916 | if (S_ISDIR(inode->i_mode)) | |
917 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
918 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 919 | } |
9e6e70f8 TM |
920 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
921 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
922 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
923 | && nfsi->npages == 0) { |
924 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
925 | ret |= NFS_INO_INVALID_ATTR; | |
926 | } | |
927 | return ret; | |
a895b4a1 TM |
928 | } |
929 | ||
1da177e4 | 930 | /** |
33801147 | 931 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
932 | * @inode - pointer to inode |
933 | * @fattr - updated attributes | |
934 | * | |
935 | * Verifies the attribute cache. If we have just changed the attributes, | |
936 | * so that fattr carries weak cache consistency data, then it may | |
937 | * also update the ctime/mtime/change_attribute. | |
938 | */ | |
33801147 | 939 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
940 | { |
941 | struct nfs_inode *nfsi = NFS_I(inode); | |
942 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 943 | unsigned long invalid = 0; |
1da177e4 | 944 | |
dc59250c | 945 | |
ca62b9c3 | 946 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
947 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
948 | return -EIO; | |
949 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 950 | return -EIO; |
ca62b9c3 | 951 | |
9e6e70f8 | 952 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
f1bb0b92 | 953 | nfsi->change_attr != fattr->change_attr) |
2a3f5fd4 | 954 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 955 | |
1da177e4 | 956 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 957 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
2a3f5fd4 | 958 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
ca62b9c3 | 959 | |
9e6e70f8 TM |
960 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
961 | cur_size = i_size_read(inode); | |
962 | new_isize = nfs_size_to_loff_t(fattr->size); | |
963 | if (cur_size != new_isize && nfsi->npages == 0) | |
964 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
965 | } | |
1da177e4 LT |
966 | |
967 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
968 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
969 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
970 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
971 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
972 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 973 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
974 | |
975 | /* Has the link count changed? */ | |
9e6e70f8 | 976 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 977 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 978 | |
9e6e70f8 | 979 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
980 | invalid |= NFS_INO_INVALID_ATIME; |
981 | ||
982 | if (invalid != 0) | |
983 | nfsi->cache_validity |= invalid; | |
1da177e4 | 984 | |
33801147 | 985 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
986 | return 0; |
987 | } | |
988 | ||
a10ad176 | 989 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 990 | { |
9e6e70f8 TM |
991 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
992 | return 0; | |
a10ad176 TM |
993 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
994 | } | |
995 | ||
996 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
997 | { | |
9e6e70f8 TM |
998 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
999 | return 0; | |
a10ad176 TM |
1000 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1001 | } | |
870a5be8 | 1002 | |
ae05f269 | 1003 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1004 | |
1005 | static unsigned long nfs_read_attr_generation_counter(void) | |
1006 | { | |
ae05f269 | 1007 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1008 | } |
1009 | ||
1010 | unsigned long nfs_inc_attr_generation_counter(void) | |
1011 | { | |
ae05f269 | 1012 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1013 | } |
1014 | ||
1015 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1016 | { | |
1017 | fattr->valid = 0; | |
1018 | fattr->time_start = jiffies; | |
1019 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1020 | } | |
1021 | ||
2d36bfde TM |
1022 | struct nfs_fattr *nfs_alloc_fattr(void) |
1023 | { | |
1024 | struct nfs_fattr *fattr; | |
1025 | ||
1026 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1027 | if (fattr != NULL) | |
1028 | nfs_fattr_init(fattr); | |
1029 | return fattr; | |
1030 | } | |
1031 | ||
1032 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1033 | { | |
1034 | struct nfs_fh *fh; | |
1035 | ||
1036 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1037 | if (fh != NULL) | |
1038 | fh->size = 0; | |
1039 | return fh; | |
1040 | } | |
1041 | ||
a10ad176 TM |
1042 | /** |
1043 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1044 | * @inode - pointer to inode | |
1045 | * @fattr - attributes | |
1046 | * | |
1047 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1048 | * attributes got scheduled after another call carrying updated ones. | |
1049 | * | |
1050 | * To do so, the function first assumes that a more recent ctime means | |
1051 | * that the attributes in fattr are newer, however it also attempt to | |
1052 | * catch the case where ctime either didn't change, or went backwards | |
1053 | * (if someone reset the clock on the server) by looking at whether | |
1054 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1055 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1056 | * |
1057 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1058 | * more recent than the ones cached in the inode. | |
1059 | * | |
1060 | */ | |
1061 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1062 | { | |
1063 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1064 | ||
4704f0e2 | 1065 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1066 | nfs_ctime_need_update(inode, fattr) || |
1067 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1068 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1069 | } |
1070 | ||
1071 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1072 | { | |
1073 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1074 | return nfs_update_inode(inode, fattr); |
1075 | return nfs_check_inode_attributes(inode, fattr); | |
1076 | } | |
1077 | ||
33801147 TM |
1078 | /** |
1079 | * nfs_refresh_inode - try to update the inode attribute cache | |
1080 | * @inode - pointer to inode | |
1081 | * @fattr - updated attributes | |
1082 | * | |
1083 | * Check that an RPC call that returned attributes has not overlapped with | |
1084 | * other recent updates of the inode metadata, then decide whether it is | |
1085 | * safe to do a full update of the inode attributes, or whether just to | |
1086 | * call nfs_check_inode_attributes. | |
1087 | */ | |
1088 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1089 | { | |
33801147 TM |
1090 | int status; |
1091 | ||
1092 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1093 | return 0; | |
1094 | spin_lock(&inode->i_lock); | |
870a5be8 | 1095 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1096 | spin_unlock(&inode->i_lock); |
ef79c097 | 1097 | |
33801147 TM |
1098 | return status; |
1099 | } | |
1100 | ||
d65f557f TM |
1101 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1102 | { | |
1103 | struct nfs_inode *nfsi = NFS_I(inode); | |
1104 | ||
1105 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1106 | if (S_ISDIR(inode->i_mode)) | |
1107 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1108 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1109 | return 0; | |
1110 | return nfs_refresh_inode_locked(inode, fattr); | |
1111 | } | |
1112 | ||
decf491f TM |
1113 | /** |
1114 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1115 | * @inode - pointer to inode | |
1116 | * @fattr - updated attributes | |
1117 | * | |
1118 | * After an operation that has changed the inode metadata, mark the | |
1119 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1120 | * |
1121 | * NB: if the server didn't return any post op attributes, this | |
1122 | * function will force the retrieval of attributes before the next | |
1123 | * NFS request. Thus it should be used only for operations that | |
1124 | * are expected to change one or more attributes, to avoid | |
1125 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1126 | */ |
1127 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1128 | { | |
d65f557f | 1129 | int status; |
decf491f | 1130 | |
7668fdbe | 1131 | spin_lock(&inode->i_lock); |
d65f557f | 1132 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1133 | spin_unlock(&inode->i_lock); |
870a5be8 | 1134 | return status; |
decf491f TM |
1135 | } |
1136 | ||
70ca8852 TM |
1137 | /** |
1138 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1139 | * @inode - pointer to inode | |
1140 | * @fattr - updated attributes | |
1141 | * | |
1142 | * After an operation that has changed the inode metadata, mark the | |
1143 | * attribute cache as being invalid, then try to update it. Fake up | |
1144 | * weak cache consistency data, if none exist. | |
1145 | * | |
1146 | * This function is mainly designed to be used by the ->write_done() functions. | |
1147 | */ | |
1148 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1149 | { | |
d65f557f TM |
1150 | int status; |
1151 | ||
1152 | spin_lock(&inode->i_lock); | |
1153 | /* Don't do a WCC update if these attributes are already stale */ | |
1154 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1155 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1156 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1157 | | NFS_ATTR_FATTR_PRESIZE | |
1158 | | NFS_ATTR_FATTR_PREMTIME | |
1159 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1160 | goto out_noforce; |
1161 | } | |
9e6e70f8 TM |
1162 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1163 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
70ca8852 | 1164 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
9e6e70f8 | 1165 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1166 | } |
9e6e70f8 TM |
1167 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1168 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1169 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1170 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1171 | } | |
1172 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1173 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1174 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1175 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1176 | } | |
1177 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1178 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1179 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1180 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1181 | } |
d65f557f TM |
1182 | out_noforce: |
1183 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1184 | spin_unlock(&inode->i_lock); | |
1185 | return status; | |
70ca8852 TM |
1186 | } |
1187 | ||
1da177e4 LT |
1188 | /* |
1189 | * Many nfs protocol calls return the new file attributes after | |
1190 | * an operation. Here we update the inode to reflect the state | |
1191 | * of the server's inode. | |
1192 | * | |
1193 | * This is a bit tricky because we have to make sure all dirty pages | |
1194 | * have been sent off to the server before calling invalidate_inode_pages. | |
1195 | * To make sure no other process adds more write requests while we try | |
1196 | * our best to flush them, we make them sleep during the attribute refresh. | |
1197 | * | |
1198 | * A very similar scenario holds for the dir cache. | |
1199 | */ | |
24aa1fe6 | 1200 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1201 | { |
8b4bdcf8 | 1202 | struct nfs_server *server; |
1da177e4 | 1203 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1204 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1205 | unsigned long invalid = 0; |
3e7d950a | 1206 | unsigned long now = jiffies; |
62ab460c | 1207 | unsigned long save_cache_validity; |
1da177e4 LT |
1208 | |
1209 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
3110ff80 | 1210 | __func__, inode->i_sb->s_id, inode->i_ino, |
1da177e4 LT |
1211 | atomic_read(&inode->i_count), fattr->valid); |
1212 | ||
9e6e70f8 | 1213 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
325cfed9 | 1214 | goto out_fileid; |
1da177e4 LT |
1215 | |
1216 | /* | |
1217 | * Make sure the inode's type hasn't changed. | |
1218 | */ | |
9e6e70f8 | 1219 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1220 | goto out_changed; |
1221 | ||
8b4bdcf8 | 1222 | server = NFS_SERVER(inode); |
a0356862 | 1223 | /* Update the fsid? */ |
9e6e70f8 | 1224 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1225 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1226 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1227 | server->fsid = fattr->fsid; |
1228 | ||
1da177e4 LT |
1229 | /* |
1230 | * Update the read time so we don't revalidate too often. | |
1231 | */ | |
33801147 | 1232 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1233 | |
62ab460c TM |
1234 | save_cache_validity = nfsi->cache_validity; |
1235 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1236 | | NFS_INO_INVALID_ATIME | |
1237 | | NFS_INO_REVAL_FORCED | |
1238 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1239 | |
a895b4a1 | 1240 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1241 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1242 | |
47aabaa7 | 1243 | /* More cache consistency checks */ |
9e6e70f8 TM |
1244 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
1245 | if (nfsi->change_attr != fattr->change_attr) { | |
1246 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
1247 | inode->i_sb->s_id, inode->i_ino); | |
1248 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1249 | if (S_ISDIR(inode->i_mode)) | |
1250 | nfs_force_lookup_revalidate(inode); | |
1251 | nfsi->change_attr = fattr->change_attr; | |
1252 | } | |
62ab460c TM |
1253 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1254 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1255 | |
1256 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
47aabaa7 TM |
1257 | /* NFSv2/v3: Check if the mtime agrees */ |
1258 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { | |
1259 | dprintk("NFS: mtime change on server for file %s/%ld\n", | |
1260 | inode->i_sb->s_id, inode->i_ino); | |
1261 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
bfc69a45 TM |
1262 | if (S_ISDIR(inode->i_mode)) |
1263 | nfs_force_lookup_revalidate(inode); | |
9e6e70f8 | 1264 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
47aabaa7 | 1265 | } |
62ab460c TM |
1266 | } else if (server->caps & NFS_CAP_MTIME) |
1267 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1268 | | NFS_INO_INVALID_DATA | |
1269 | | NFS_INO_REVAL_PAGECACHE | |
1270 | | NFS_INO_REVAL_FORCED); | |
1271 | ||
9e6e70f8 | 1272 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
47aabaa7 | 1273 | /* If ctime has changed we should definitely clear access+acl caches */ |
37d9d76d | 1274 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
4704f0e2 | 1275 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
37d9d76d N |
1276 | /* and probably clear data for a directory too as utimes can cause |
1277 | * havoc with our cache. | |
1278 | */ | |
1279 | if (S_ISDIR(inode->i_mode)) { | |
1280 | invalid |= NFS_INO_INVALID_DATA; | |
1281 | nfs_force_lookup_revalidate(inode); | |
1282 | } | |
9e6e70f8 | 1283 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
37d9d76d | 1284 | } |
62ab460c TM |
1285 | } else if (server->caps & NFS_CAP_CTIME) |
1286 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1287 | | NFS_INO_INVALID_ACCESS | |
1288 | | NFS_INO_INVALID_ACL | |
1289 | | NFS_INO_REVAL_FORCED); | |
47aabaa7 | 1290 | |
951a143b | 1291 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1292 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1293 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1294 | cur_isize = i_size_read(inode); | |
1295 | if (new_isize != cur_isize) { | |
1296 | /* Do we perhaps have any outstanding writes, or has | |
1297 | * the file grown beyond our last write? */ | |
0f66b598 PT |
1298 | if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) || |
1299 | new_isize > cur_isize) { | |
9e6e70f8 TM |
1300 | i_size_write(inode, new_isize); |
1301 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1302 | } | |
60c16ea8 HJ |
1303 | dprintk("NFS: isize change on server for file %s/%ld " |
1304 | "(%Ld to %Ld)\n", | |
1305 | inode->i_sb->s_id, | |
1306 | inode->i_ino, | |
1307 | (long long)cur_isize, | |
1308 | (long long)new_isize); | |
1da177e4 | 1309 | } |
62ab460c TM |
1310 | } else |
1311 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1312 | | NFS_INO_REVAL_PAGECACHE | |
1313 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1314 | |
1da177e4 | 1315 | |
9e6e70f8 TM |
1316 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1317 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1318 | else if (server->caps & NFS_CAP_ATIME) |
1319 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1320 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1321 | |
9e6e70f8 TM |
1322 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1323 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1324 | umode_t newmode = inode->i_mode & S_IFMT; |
1325 | newmode |= fattr->mode & S_IALLUGO; | |
1326 | inode->i_mode = newmode; | |
9e6e70f8 | 1327 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1328 | } |
62ab460c TM |
1329 | } else if (server->caps & NFS_CAP_MODE) |
1330 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1331 | | NFS_INO_INVALID_ACCESS | |
1332 | | NFS_INO_INVALID_ACL | |
1333 | | NFS_INO_REVAL_FORCED); | |
1334 | ||
9e6e70f8 TM |
1335 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1336 | if (inode->i_uid != fattr->uid) { | |
1337 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1338 | inode->i_uid = fattr->uid; | |
1339 | } | |
62ab460c TM |
1340 | } else if (server->caps & NFS_CAP_OWNER) |
1341 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1342 | | NFS_INO_INVALID_ACCESS | |
1343 | | NFS_INO_INVALID_ACL | |
1344 | | NFS_INO_REVAL_FORCED); | |
1345 | ||
9e6e70f8 TM |
1346 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1347 | if (inode->i_gid != fattr->gid) { | |
1348 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1349 | inode->i_gid = fattr->gid; | |
1350 | } | |
62ab460c TM |
1351 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1352 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1353 | | NFS_INO_INVALID_ACCESS | |
1354 | | NFS_INO_INVALID_ACL | |
1355 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1356 | |
9e6e70f8 TM |
1357 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1358 | if (inode->i_nlink != fattr->nlink) { | |
1359 | invalid |= NFS_INO_INVALID_ATTR; | |
1360 | if (S_ISDIR(inode->i_mode)) | |
1361 | invalid |= NFS_INO_INVALID_DATA; | |
1362 | inode->i_nlink = fattr->nlink; | |
1363 | } | |
62ab460c TM |
1364 | } else if (server->caps & NFS_CAP_NLINK) |
1365 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1366 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1367 | |
9e6e70f8 | 1368 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1369 | /* |
1370 | * report the blocks in 512byte units | |
1371 | */ | |
1372 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1373 | } |
9e6e70f8 TM |
1374 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1375 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1376 | |
1377 | /* Update attrtimeo value if we're out of the unstable period */ | |
1378 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1379 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1380 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1381 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1382 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1383 | } else { |
64672d55 | 1384 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1385 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1386 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1387 | nfsi->attrtimeo_timestamp = now; | |
1388 | } | |
1da177e4 | 1389 | } |
f2115dc9 | 1390 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1391 | /* Don't invalidate the data if we were to blame */ |
1392 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1393 | || S_ISLNK(inode->i_mode))) | |
1394 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce | 1395 | if (!nfs_have_delegation(inode, FMODE_READ) || |
62ab460c | 1396 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1397 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1398 | |
1399 | return 0; | |
1400 | out_changed: | |
1401 | /* | |
1402 | * Big trouble! The inode has become a different object. | |
1403 | */ | |
1da177e4 | 1404 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
3110ff80 | 1405 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
b37b03b7 | 1406 | out_err: |
1da177e4 LT |
1407 | /* |
1408 | * No need to worry about unhashing the dentry, as the | |
1409 | * lookup validation will know that the inode is bad. | |
1410 | * (But we fall through to invalidate the caches.) | |
1411 | */ | |
1412 | nfs_invalidate_inode(inode); | |
1da177e4 | 1413 | return -ESTALE; |
325cfed9 CL |
1414 | |
1415 | out_fileid: | |
1416 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1417 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
54ceac45 | 1418 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
325cfed9 CL |
1419 | (long long)nfsi->fileid, (long long)fattr->fileid); |
1420 | goto out_err; | |
1da177e4 LT |
1421 | } |
1422 | ||
55a97593 | 1423 | |
1da177e4 LT |
1424 | #ifdef CONFIG_NFS_V4 |
1425 | ||
1da177e4 LT |
1426 | /* |
1427 | * Clean out any remaining NFSv4 state that might be left over due | |
1428 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1429 | * nfs_open(). | |
1430 | */ | |
b57922d9 | 1431 | void nfs4_evict_inode(struct inode *inode) |
1da177e4 | 1432 | { |
b57922d9 AV |
1433 | truncate_inode_pages(&inode->i_data, 0); |
1434 | end_writeback(inode); | |
cbe82603 BH |
1435 | pnfs_return_layout(inode); |
1436 | pnfs_destroy_layout(NFS_I(inode)); | |
1da177e4 | 1437 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1438 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1439 | /* First call standard NFS clear_inode() code */ |
1440 | nfs_clear_inode(inode); | |
1da177e4 | 1441 | } |
1da177e4 LT |
1442 | #endif |
1443 | ||
f7b422b1 | 1444 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1445 | { |
1446 | struct nfs_inode *nfsi; | |
e94b1766 | 1447 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1448 | if (!nfsi) |
1449 | return NULL; | |
55296809 CL |
1450 | nfsi->flags = 0UL; |
1451 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1452 | #ifdef CONFIG_NFS_V3_ACL |
1453 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1454 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1455 | #endif | |
e50a1c2e BF |
1456 | #ifdef CONFIG_NFS_V4 |
1457 | nfsi->nfs4_acl = NULL; | |
1458 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1459 | return &nfsi->vfs_inode; |
1460 | } | |
1461 | ||
fa0d7e3d | 1462 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1463 | { |
fa0d7e3d NP |
1464 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1465 | INIT_LIST_HEAD(&inode->i_dentry); | |
1da177e4 LT |
1466 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1467 | } | |
1468 | ||
fa0d7e3d NP |
1469 | void nfs_destroy_inode(struct inode *inode) |
1470 | { | |
1471 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1472 | } | |
1473 | ||
d75d5414 AM |
1474 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1475 | { | |
1476 | #ifdef CONFIG_NFS_V4 | |
1477 | INIT_LIST_HEAD(&nfsi->open_states); | |
1478 | nfsi->delegation = NULL; | |
1479 | nfsi->delegation_state = 0; | |
1480 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1481 | nfsi->layout = NULL; |
e0c2b380 | 1482 | atomic_set(&nfsi->commits_outstanding, 0); |
d75d5414 AM |
1483 | #endif |
1484 | } | |
f7b422b1 | 1485 | |
51cc5068 | 1486 | static void init_once(void *foo) |
1da177e4 LT |
1487 | { |
1488 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1489 | ||
a35afb83 | 1490 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1491 | INIT_LIST_HEAD(&nfsi->open_files); |
1492 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1493 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
1494 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
a35afb83 | 1495 | nfsi->npages = 0; |
ff778d02 | 1496 | nfsi->ncommit = 0; |
565277f6 TM |
1497 | atomic_set(&nfsi->silly_count, 1); |
1498 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1499 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1500 | nfs4_init_once(nfsi); |
1da177e4 | 1501 | } |
20c2df83 | 1502 | |
f7b422b1 | 1503 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1504 | { |
1505 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1506 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1507 | 0, (SLAB_RECLAIM_ACCOUNT| |
1508 | SLAB_MEM_SPREAD), | |
20c2df83 | 1509 | init_once); |
1da177e4 LT |
1510 | if (nfs_inode_cachep == NULL) |
1511 | return -ENOMEM; | |
1512 | ||
1513 | return 0; | |
1514 | } | |
1515 | ||
266bee88 | 1516 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1517 | { |
1a1d92c1 | 1518 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1519 | } |
1520 | ||
5746006f TM |
1521 | struct workqueue_struct *nfsiod_workqueue; |
1522 | ||
1523 | /* | |
1524 | * start up the nfsiod workqueue | |
1525 | */ | |
1526 | static int nfsiod_start(void) | |
1527 | { | |
1528 | struct workqueue_struct *wq; | |
1529 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1530 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1531 | if (wq == NULL) |
1532 | return -ENOMEM; | |
1533 | nfsiod_workqueue = wq; | |
1534 | return 0; | |
1535 | } | |
1536 | ||
1537 | /* | |
1538 | * Destroy the nfsiod workqueue | |
1539 | */ | |
1540 | static void nfsiod_stop(void) | |
1541 | { | |
1542 | struct workqueue_struct *wq; | |
1543 | ||
1544 | wq = nfsiod_workqueue; | |
1545 | if (wq == NULL) | |
1546 | return; | |
1547 | nfsiod_workqueue = NULL; | |
1548 | destroy_workqueue(wq); | |
1549 | } | |
1550 | ||
1da177e4 LT |
1551 | /* |
1552 | * Initialize NFS | |
1553 | */ | |
1554 | static int __init init_nfs_fs(void) | |
1555 | { | |
1556 | int err; | |
1557 | ||
955a857e BS |
1558 | err = nfs_idmap_init(); |
1559 | if (err < 0) | |
1560 | goto out9; | |
1561 | ||
e571cbf1 TM |
1562 | err = nfs_dns_resolver_init(); |
1563 | if (err < 0) | |
1564 | goto out8; | |
1565 | ||
8ec442ae DH |
1566 | err = nfs_fscache_register(); |
1567 | if (err < 0) | |
1568 | goto out7; | |
1569 | ||
5746006f TM |
1570 | err = nfsiod_start(); |
1571 | if (err) | |
1572 | goto out6; | |
1573 | ||
6aaca566 DH |
1574 | err = nfs_fs_proc_init(); |
1575 | if (err) | |
1576 | goto out5; | |
1577 | ||
1da177e4 LT |
1578 | err = nfs_init_nfspagecache(); |
1579 | if (err) | |
1580 | goto out4; | |
1581 | ||
1582 | err = nfs_init_inodecache(); | |
1583 | if (err) | |
1584 | goto out3; | |
1585 | ||
1586 | err = nfs_init_readpagecache(); | |
1587 | if (err) | |
1588 | goto out2; | |
1589 | ||
1590 | err = nfs_init_writepagecache(); | |
1591 | if (err) | |
1592 | goto out1; | |
1593 | ||
1da177e4 LT |
1594 | err = nfs_init_directcache(); |
1595 | if (err) | |
1596 | goto out0; | |
1da177e4 LT |
1597 | |
1598 | #ifdef CONFIG_PROC_FS | |
1599 | rpc_proc_register(&nfs_rpcstat); | |
1600 | #endif | |
f7b422b1 | 1601 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1602 | goto out; |
1603 | return 0; | |
1604 | out: | |
1605 | #ifdef CONFIG_PROC_FS | |
1606 | rpc_proc_unregister("nfs"); | |
1607 | #endif | |
1da177e4 | 1608 | nfs_destroy_directcache(); |
6b59a754 | 1609 | out0: |
6b59a754 | 1610 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1611 | out1: |
1612 | nfs_destroy_readpagecache(); | |
1613 | out2: | |
1614 | nfs_destroy_inodecache(); | |
1615 | out3: | |
1616 | nfs_destroy_nfspagecache(); | |
1617 | out4: | |
6aaca566 DH |
1618 | nfs_fs_proc_exit(); |
1619 | out5: | |
5746006f TM |
1620 | nfsiod_stop(); |
1621 | out6: | |
8ec442ae DH |
1622 | nfs_fscache_unregister(); |
1623 | out7: | |
e571cbf1 TM |
1624 | nfs_dns_resolver_destroy(); |
1625 | out8: | |
955a857e BS |
1626 | nfs_idmap_quit(); |
1627 | out9: | |
1da177e4 LT |
1628 | return err; |
1629 | } | |
1630 | ||
1631 | static void __exit exit_nfs_fs(void) | |
1632 | { | |
1da177e4 | 1633 | nfs_destroy_directcache(); |
1da177e4 LT |
1634 | nfs_destroy_writepagecache(); |
1635 | nfs_destroy_readpagecache(); | |
1636 | nfs_destroy_inodecache(); | |
1637 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1638 | nfs_fscache_unregister(); |
e571cbf1 | 1639 | nfs_dns_resolver_destroy(); |
955a857e | 1640 | nfs_idmap_quit(); |
1da177e4 LT |
1641 | #ifdef CONFIG_PROC_FS |
1642 | rpc_proc_unregister("nfs"); | |
1643 | #endif | |
f4eecd5d | 1644 | nfs_cleanup_cb_ident_idr(); |
f7b422b1 | 1645 | unregister_nfs_fs(); |
6aaca566 | 1646 | nfs_fs_proc_exit(); |
5746006f | 1647 | nfsiod_stop(); |
1da177e4 LT |
1648 | } |
1649 | ||
1650 | /* Not quite true; I just maintain it */ | |
1651 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1652 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1653 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1654 | |
1655 | module_init(init_nfs_fs) | |
1656 | module_exit(exit_nfs_fs) |