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> |
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 | ||
9e6e70f8 | 257 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) |
1da177e4 | 258 | goto out_no_inode; |
9e6e70f8 | 259 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 260 | goto out_no_inode; |
1da177e4 LT |
261 | |
262 | hash = nfs_fattr_to_ino_t(fattr); | |
263 | ||
03f28e3a TM |
264 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
265 | if (inode == NULL) { | |
266 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 267 | goto out_no_inode; |
03f28e3a | 268 | } |
1da177e4 LT |
269 | |
270 | if (inode->i_state & I_NEW) { | |
271 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 272 | unsigned long now = jiffies; |
1da177e4 LT |
273 | |
274 | /* We set i_ino for the few things that still rely on it, | |
275 | * such as stat(2) */ | |
276 | inode->i_ino = hash; | |
277 | ||
278 | /* We can't support update_atime(), since the server will reset it */ | |
279 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
280 | inode->i_mode = fattr->mode; | |
62ab460c TM |
281 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
282 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
283 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
284 | | NFS_INO_INVALID_ACCESS | |
285 | | NFS_INO_INVALID_ACL; | |
1da177e4 LT |
286 | /* Why so? Because we want revalidate for devices/FIFOs, and |
287 | * that's precisely what we have in nfs_file_inode_operations. | |
288 | */ | |
8fa5c000 | 289 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 LT |
290 | if (S_ISREG(inode->i_mode)) { |
291 | inode->i_fop = &nfs_file_operations; | |
292 | inode->i_data.a_ops = &nfs_file_aops; | |
293 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
294 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 295 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 296 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 297 | inode->i_data.a_ops = &nfs_dir_aops; |
0715dc63 | 298 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)) |
3a10c30a | 299 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
55a97593 | 300 | /* Deal with crossing mountpoints */ |
9e6e70f8 TM |
301 | if ((fattr->valid & NFS_ATTR_FATTR_FSID) |
302 | && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { | |
6b97fd3d MN |
303 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
304 | inode->i_op = &nfs_referral_inode_operations; | |
305 | else | |
306 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 307 | inode->i_fop = NULL; |
36d43a43 | 308 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 309 | } |
1da177e4 LT |
310 | } else if (S_ISLNK(inode->i_mode)) |
311 | inode->i_op = &nfs_symlink_inode_operations; | |
312 | else | |
313 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
314 | ||
9e6e70f8 TM |
315 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
316 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
317 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
318 | nfsi->change_attr = 0; | |
319 | inode->i_size = 0; | |
320 | inode->i_nlink = 0; | |
321 | inode->i_uid = -2; | |
322 | inode->i_gid = -2; | |
323 | inode->i_blocks = 0; | |
324 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
325 | ||
33801147 | 326 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 327 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
328 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
329 | inode->i_atime = fattr->atime; | |
62ab460c TM |
330 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
331 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
332 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
333 | inode->i_mtime = fattr->mtime; | |
62ab460c TM |
334 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
335 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
336 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
337 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
338 | inode->i_ctime = fattr->ctime; | |
62ab460c TM |
339 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
340 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
341 | | NFS_INO_INVALID_ACCESS | |
342 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 | 343 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
1da177e4 | 344 | nfsi->change_attr = fattr->change_attr; |
62ab460c TM |
345 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
346 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
347 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
348 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
349 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
350 | else |
351 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
352 | | NFS_INO_INVALID_DATA | |
353 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
354 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
355 | inode->i_nlink = fattr->nlink; | |
62ab460c TM |
356 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
357 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
358 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
359 | inode->i_uid = fattr->uid; | |
62ab460c TM |
360 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
361 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
362 | | NFS_INO_INVALID_ACCESS | |
363 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
364 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
365 | inode->i_gid = fattr->gid; | |
62ab460c TM |
366 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
367 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
368 | | NFS_INO_INVALID_ACCESS | |
369 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
370 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
371 | inode->i_blocks = fattr->du.nfs2.blocks; | |
372 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
373 | /* |
374 | * report the blocks in 512byte units | |
375 | */ | |
376 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
377 | } |
378 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 379 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 380 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 381 | |
ef79c097 DH |
382 | nfs_fscache_init_inode_cookie(inode); |
383 | ||
1da177e4 LT |
384 | unlock_new_inode(inode); |
385 | } else | |
386 | nfs_refresh_inode(inode, fattr); | |
387 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
388 | inode->i_sb->s_id, | |
389 | (long long)NFS_FILEID(inode), | |
390 | atomic_read(&inode->i_count)); | |
391 | ||
392 | out: | |
393 | return inode; | |
394 | ||
395 | out_no_inode: | |
03f28e3a | 396 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
397 | goto out; |
398 | } | |
399 | ||
659bfcd6 | 400 | #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 |
401 | |
402 | int | |
403 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
404 | { | |
405 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
406 | struct nfs_fattr *fattr; |
407 | int error = -ENOMEM; | |
1da177e4 | 408 | |
91d5b470 CL |
409 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
410 | ||
188b95dd JL |
411 | /* skip mode change if it's just for clearing setuid/setgid */ |
412 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
413 | attr->ia_valid &= ~ATTR_MODE; | |
414 | ||
1da177e4 LT |
415 | if (attr->ia_valid & ATTR_SIZE) { |
416 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
417 | attr->ia_valid &= ~ATTR_SIZE; | |
418 | } | |
419 | ||
420 | /* Optimization: if the end result is no change, don't RPC */ | |
421 | attr->ia_valid &= NFS_VALID_ATTRS; | |
659bfcd6 | 422 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
1da177e4 LT |
423 | return 0; |
424 | ||
755c1e20 | 425 | /* Write all dirty data */ |
1b924e5f | 426 | if (S_ISREG(inode->i_mode)) |
e1552e19 | 427 | nfs_wb_all(inode); |
987f8dfc TM |
428 | |
429 | fattr = nfs_alloc_fattr(); | |
430 | if (fattr == NULL) | |
431 | goto out; | |
642ac549 TM |
432 | /* |
433 | * Return any delegations if we're going to change ACLs | |
434 | */ | |
435 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
436 | nfs_inode_return_delegation(inode); | |
987f8dfc | 437 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 438 | if (error == 0) |
987f8dfc TM |
439 | nfs_refresh_inode(inode, fattr); |
440 | nfs_free_fattr(fattr); | |
441 | out: | |
65e4308d TM |
442 | return error; |
443 | } | |
444 | ||
a3d01454 TM |
445 | /** |
446 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
447 | * @inode: inode of the file used | |
448 | * @offset: file offset to start truncating | |
449 | * | |
450 | * This is a copy of the common vmtruncate, but with the locking | |
451 | * corrected to take into account the fact that NFS requires | |
452 | * inode->i_size to be updated under the inode->i_lock. | |
453 | */ | |
454 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
455 | { | |
c08d3b0e | 456 | loff_t oldsize; |
457 | int err; | |
a3d01454 | 458 | |
c08d3b0e | 459 | err = inode_newsize_ok(inode, offset); |
460 | if (err) | |
461 | goto out; | |
a3d01454 | 462 | |
c08d3b0e | 463 | spin_lock(&inode->i_lock); |
464 | oldsize = inode->i_size; | |
465 | i_size_write(inode, offset); | |
466 | spin_unlock(&inode->i_lock); | |
467 | ||
468 | truncate_pagecache(inode, oldsize, offset); | |
469 | out: | |
470 | return err; | |
a3d01454 TM |
471 | } |
472 | ||
65e4308d TM |
473 | /** |
474 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
475 | * @inode: pointer to struct inode | |
476 | * @attr: pointer to struct iattr | |
477 | * | |
478 | * Note: we do this in the *proc.c in order to ensure that | |
479 | * it works for things like exclusive creates too. | |
480 | */ | |
481 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
482 | { | |
483 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 484 | spin_lock(&inode->i_lock); |
1da177e4 | 485 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
486 | int mode = attr->ia_mode & S_IALLUGO; |
487 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
488 | inode->i_mode = mode; |
489 | } | |
490 | if ((attr->ia_valid & ATTR_UID) != 0) | |
491 | inode->i_uid = attr->ia_uid; | |
492 | if ((attr->ia_valid & ATTR_GID) != 0) | |
493 | inode->i_gid = attr->ia_gid; | |
55296809 | 494 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 495 | spin_unlock(&inode->i_lock); |
65e4308d TM |
496 | } |
497 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 498 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 499 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 500 | } |
1da177e4 LT |
501 | } |
502 | ||
1da177e4 LT |
503 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
504 | { | |
505 | struct inode *inode = dentry->d_inode; | |
55296809 | 506 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
507 | int err; |
508 | ||
acdc53b2 | 509 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 510 | if (S_ISREG(inode->i_mode)) { |
acdc53b2 TM |
511 | err = filemap_write_and_wait(inode->i_mapping); |
512 | if (err) | |
513 | goto out; | |
28c494c5 | 514 | } |
fc33a7bb CH |
515 | |
516 | /* | |
517 | * We may force a getattr if the user cares about atime. | |
518 | * | |
519 | * Note that we only have to check the vfsmount flags here: | |
520 | * - NFS always sets S_NOATIME by so checking it would give a | |
521 | * bogus result | |
522 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
523 | * no point in checking those. | |
524 | */ | |
525 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
526 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 527 | need_atime = 0; |
fc33a7bb | 528 | |
1da177e4 LT |
529 | if (need_atime) |
530 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
531 | else | |
532 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 533 | if (!err) { |
1da177e4 | 534 | generic_fillattr(inode, stat); |
f43bf0be | 535 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 536 | } |
acdc53b2 | 537 | out: |
1da177e4 LT |
538 | return err; |
539 | } | |
540 | ||
f11ac8db TM |
541 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
542 | { | |
543 | atomic_set(&l_ctx->count, 1); | |
544 | l_ctx->lockowner = current->files; | |
545 | l_ctx->pid = current->tgid; | |
546 | INIT_LIST_HEAD(&l_ctx->list); | |
547 | } | |
548 | ||
549 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
550 | { | |
551 | struct nfs_lock_context *pos; | |
552 | ||
553 | list_for_each_entry(pos, &ctx->lock_context.list, list) { | |
554 | if (pos->lockowner != current->files) | |
555 | continue; | |
556 | if (pos->pid != current->tgid) | |
557 | continue; | |
558 | atomic_inc(&pos->count); | |
559 | return pos; | |
560 | } | |
561 | return NULL; | |
562 | } | |
563 | ||
564 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
565 | { | |
566 | struct nfs_lock_context *res, *new = NULL; | |
567 | struct inode *inode = ctx->path.dentry->d_inode; | |
568 | ||
569 | spin_lock(&inode->i_lock); | |
570 | res = __nfs_find_lock_context(ctx); | |
571 | if (res == NULL) { | |
572 | spin_unlock(&inode->i_lock); | |
573 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
574 | if (new == NULL) | |
575 | return NULL; | |
576 | nfs_init_lock_context(new); | |
577 | spin_lock(&inode->i_lock); | |
578 | res = __nfs_find_lock_context(ctx); | |
579 | if (res == NULL) { | |
580 | list_add_tail(&new->list, &ctx->lock_context.list); | |
581 | new->open_context = ctx; | |
582 | res = new; | |
583 | new = NULL; | |
584 | } | |
585 | } | |
586 | spin_unlock(&inode->i_lock); | |
587 | kfree(new); | |
588 | return res; | |
589 | } | |
590 | ||
591 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
592 | { | |
593 | struct nfs_open_context *ctx = l_ctx->open_context; | |
594 | struct inode *inode = ctx->path.dentry->d_inode; | |
595 | ||
596 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
597 | return; | |
598 | list_del(&l_ctx->list); | |
599 | spin_unlock(&inode->i_lock); | |
600 | kfree(l_ctx); | |
601 | } | |
602 | ||
7fe5c398 TM |
603 | /** |
604 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
605 | * @ctx: pointer to context | |
606 | * @is_sync: is this a synchronous close | |
607 | * | |
608 | * always ensure that the attributes are up to date if we're mounted | |
609 | * with close-to-open semantics | |
610 | */ | |
611 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
612 | { | |
613 | struct inode *inode; | |
614 | struct nfs_server *server; | |
615 | ||
616 | if (!(ctx->mode & FMODE_WRITE)) | |
617 | return; | |
618 | if (!is_sync) | |
619 | return; | |
620 | inode = ctx->path.dentry->d_inode; | |
621 | if (!list_empty(&NFS_I(inode)->open_files)) | |
622 | return; | |
623 | server = NFS_SERVER(inode); | |
624 | if (server->flags & NFS_MOUNT_NOCTO) | |
625 | return; | |
626 | nfs_revalidate_inode(server, inode); | |
627 | } | |
628 | ||
cd9a1c0e | 629 | struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode) |
1da177e4 LT |
630 | { |
631 | struct nfs_open_context *ctx; | |
632 | ||
f52720ca | 633 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
1da177e4 | 634 | if (ctx != NULL) { |
6eae7974 AV |
635 | ctx->path = *path; |
636 | path_get(&ctx->path); | |
1da177e4 LT |
637 | ctx->cred = get_rpccred(cred); |
638 | ctx->state = NULL; | |
cd9a1c0e | 639 | ctx->mode = f_mode; |
66d3aac0 | 640 | ctx->flags = 0; |
1da177e4 | 641 | ctx->error = 0; |
00a92642 | 642 | ctx->dir_cookie = 0; |
f11ac8db TM |
643 | nfs_init_lock_context(&ctx->lock_context); |
644 | ctx->lock_context.open_context = ctx; | |
5c78f58e | 645 | INIT_LIST_HEAD(&ctx->list); |
1da177e4 LT |
646 | } |
647 | return ctx; | |
648 | } | |
649 | ||
650 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
651 | { | |
652 | if (ctx != NULL) | |
f11ac8db | 653 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
654 | return ctx; |
655 | } | |
656 | ||
7fe5c398 | 657 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 658 | { |
7fe5c398 | 659 | struct inode *inode = ctx->path.dentry->d_inode; |
3bec63db | 660 | |
5c78f58e | 661 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
662 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
663 | return; | |
664 | list_del(&ctx->list); | |
665 | spin_unlock(&inode->i_lock); | |
ef84303e | 666 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 667 | return; |
5c78f58e TM |
668 | if (inode != NULL) |
669 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
670 | if (ctx->cred != NULL) |
671 | put_rpccred(ctx->cred); | |
31f31db1 | 672 | path_put(&ctx->path); |
3bec63db TM |
673 | kfree(ctx); |
674 | } | |
675 | ||
a49c3c77 TM |
676 | void put_nfs_open_context(struct nfs_open_context *ctx) |
677 | { | |
678 | __put_nfs_open_context(ctx, 0); | |
679 | } | |
680 | ||
1da177e4 LT |
681 | /* |
682 | * Ensure that mmap has a recent RPC credential for use when writing out | |
683 | * shared pages | |
684 | */ | |
cd9a1c0e | 685 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 686 | { |
01cce933 | 687 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
688 | struct nfs_inode *nfsi = NFS_I(inode); |
689 | ||
690 | filp->private_data = get_nfs_open_context(ctx); | |
691 | spin_lock(&inode->i_lock); | |
692 | list_add(&ctx->list, &nfsi->open_files); | |
693 | spin_unlock(&inode->i_lock); | |
694 | } | |
695 | ||
d530838b TM |
696 | /* |
697 | * Given an inode, search for an open context with the desired characteristics | |
698 | */ | |
dc0b027d | 699 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
700 | { |
701 | struct nfs_inode *nfsi = NFS_I(inode); | |
702 | struct nfs_open_context *pos, *ctx = NULL; | |
703 | ||
704 | spin_lock(&inode->i_lock); | |
705 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
706 | if (cred != NULL && pos->cred != cred) |
707 | continue; | |
1544fa0f TM |
708 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
709 | continue; | |
710 | ctx = get_nfs_open_context(pos); | |
711 | break; | |
1da177e4 LT |
712 | } |
713 | spin_unlock(&inode->i_lock); | |
714 | return ctx; | |
715 | } | |
716 | ||
b92dccf6 | 717 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 718 | { |
01cce933 | 719 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 720 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
721 | |
722 | if (ctx) { | |
723 | filp->private_data = NULL; | |
724 | spin_lock(&inode->i_lock); | |
725 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
726 | spin_unlock(&inode->i_lock); | |
f895c53f | 727 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
728 | } |
729 | } | |
730 | ||
731 | /* | |
732 | * These allocate and release file read/write context information. | |
733 | */ | |
734 | int nfs_open(struct inode *inode, struct file *filp) | |
735 | { | |
736 | struct nfs_open_context *ctx; | |
737 | struct rpc_cred *cred; | |
738 | ||
98a8e323 | 739 | cred = rpc_lookup_cred(); |
1da177e4 LT |
740 | if (IS_ERR(cred)) |
741 | return PTR_ERR(cred); | |
cd9a1c0e | 742 | ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode); |
1da177e4 LT |
743 | put_rpccred(cred); |
744 | if (ctx == NULL) | |
745 | return -ENOMEM; | |
1da177e4 LT |
746 | nfs_file_set_open_context(filp, ctx); |
747 | put_nfs_open_context(ctx); | |
ef79c097 | 748 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
749 | return 0; |
750 | } | |
751 | ||
752 | int nfs_release(struct inode *inode, struct file *filp) | |
753 | { | |
1da177e4 LT |
754 | nfs_file_clear_open_context(filp); |
755 | return 0; | |
756 | } | |
757 | ||
758 | /* | |
759 | * This function is called whenever some part of NFS notices that | |
760 | * the cached attributes have to be refreshed. | |
761 | */ | |
762 | int | |
763 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
764 | { | |
765 | int status = -ESTALE; | |
a3cba2aa | 766 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 767 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
768 | |
769 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
770 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
771 | ||
85233a7a | 772 | if (is_bad_inode(inode)) |
691beb13 | 773 | goto out; |
1da177e4 | 774 | if (NFS_STALE(inode)) |
412d582e | 775 | goto out; |
7fdc49c4 | 776 | |
a3cba2aa TM |
777 | status = -ENOMEM; |
778 | fattr = nfs_alloc_fattr(); | |
779 | if (fattr == NULL) | |
780 | goto out; | |
781 | ||
691beb13 | 782 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
a3cba2aa | 783 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
1da177e4 LT |
784 | if (status != 0) { |
785 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
786 | inode->i_sb->s_id, | |
787 | (long long)NFS_FILEID(inode), status); | |
788 | if (status == -ESTALE) { | |
789 | nfs_zap_caches(inode); | |
790 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 791 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
792 | } |
793 | goto out; | |
794 | } | |
795 | ||
a3cba2aa | 796 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
797 | if (status) { |
798 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
799 | inode->i_sb->s_id, | |
800 | (long long)NFS_FILEID(inode), status); | |
801 | goto out; | |
802 | } | |
55296809 | 803 | |
24aa1fe6 | 804 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 805 | nfs_zap_acl_cache(inode); |
55296809 | 806 | |
1da177e4 LT |
807 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
808 | inode->i_sb->s_id, | |
809 | (long long)NFS_FILEID(inode)); | |
810 | ||
412d582e | 811 | out: |
a3cba2aa | 812 | nfs_free_fattr(fattr); |
1da177e4 LT |
813 | return status; |
814 | } | |
815 | ||
816 | int nfs_attribute_timeout(struct inode *inode) | |
817 | { | |
818 | struct nfs_inode *nfsi = NFS_I(inode); | |
819 | ||
d7cf8dd0 TM |
820 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
821 | } | |
822 | ||
823 | static int nfs_attribute_cache_expired(struct inode *inode) | |
824 | { | |
b4d2314b | 825 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 826 | return 0; |
d7cf8dd0 | 827 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
828 | } |
829 | ||
830 | /** | |
831 | * nfs_revalidate_inode - Revalidate the inode attributes | |
832 | * @server - pointer to nfs_server struct | |
833 | * @inode - pointer to inode struct | |
834 | * | |
835 | * Updates inode attribute information by retrieving the data from the server. | |
836 | */ | |
837 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
838 | { | |
44b11874 | 839 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
d7cf8dd0 | 840 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
841 | return NFS_STALE(inode) ? -ESTALE : 0; |
842 | return __nfs_revalidate_inode(server, inode); | |
843 | } | |
844 | ||
1cda707d | 845 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
846 | { |
847 | struct nfs_inode *nfsi = NFS_I(inode); | |
848 | ||
849 | if (mapping->nrpages != 0) { | |
850 | int ret = invalidate_inode_pages2(mapping); | |
851 | if (ret < 0) | |
852 | return ret; | |
853 | } | |
854 | spin_lock(&inode->i_lock); | |
855 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 856 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 857 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
858 | spin_unlock(&inode->i_lock); |
859 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 860 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
861 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
862 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
863 | return 0; | |
864 | } | |
865 | ||
717d44e8 TM |
866 | /** |
867 | * nfs_revalidate_mapping - Revalidate the pagecache | |
868 | * @inode - pointer to host inode | |
869 | * @mapping - pointer to mapping | |
717d44e8 TM |
870 | */ |
871 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
872 | { | |
873 | struct nfs_inode *nfsi = NFS_I(inode); | |
874 | int ret = 0; | |
dc59250c | 875 | |
717d44e8 | 876 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
d7cf8dd0 TM |
877 | || nfs_attribute_cache_expired(inode) |
878 | || NFS_STALE(inode)) { | |
717d44e8 TM |
879 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
880 | if (ret < 0) | |
881 | goto out; | |
7d52e862 | 882 | } |
717d44e8 TM |
883 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
884 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 885 | out: |
44b11874 | 886 | return ret; |
7d52e862 TM |
887 | } |
888 | ||
27dc1cd3 | 889 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
890 | { |
891 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 892 | unsigned long ret = 0; |
a895b4a1 | 893 | |
9e6e70f8 TM |
894 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
895 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
896 | && nfsi->change_attr == fattr->pre_change_attr) { | |
70ca8852 TM |
897 | nfsi->change_attr = fattr->change_attr; |
898 | if (S_ISDIR(inode->i_mode)) | |
899 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 900 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 901 | } |
a895b4a1 | 902 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
903 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
904 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
905 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
906 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
907 | ret |= NFS_INO_INVALID_ATTR; | |
908 | } | |
9e6e70f8 TM |
909 | |
910 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
911 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
912 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
913 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
914 | if (S_ISDIR(inode->i_mode)) | |
915 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
916 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 917 | } |
9e6e70f8 TM |
918 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
919 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
920 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
921 | && nfsi->npages == 0) { |
922 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
923 | ret |= NFS_INO_INVALID_ATTR; | |
924 | } | |
925 | return ret; | |
a895b4a1 TM |
926 | } |
927 | ||
1da177e4 | 928 | /** |
33801147 | 929 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
930 | * @inode - pointer to inode |
931 | * @fattr - updated attributes | |
932 | * | |
933 | * Verifies the attribute cache. If we have just changed the attributes, | |
934 | * so that fattr carries weak cache consistency data, then it may | |
935 | * also update the ctime/mtime/change_attribute. | |
936 | */ | |
33801147 | 937 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
938 | { |
939 | struct nfs_inode *nfsi = NFS_I(inode); | |
940 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 941 | unsigned long invalid = 0; |
1da177e4 | 942 | |
dc59250c | 943 | |
ca62b9c3 | 944 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
945 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
946 | return -EIO; | |
947 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 948 | return -EIO; |
ca62b9c3 | 949 | |
9e6e70f8 | 950 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
f1bb0b92 | 951 | nfsi->change_attr != fattr->change_attr) |
2a3f5fd4 | 952 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 953 | |
1da177e4 | 954 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 955 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
2a3f5fd4 | 956 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
ca62b9c3 | 957 | |
9e6e70f8 TM |
958 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
959 | cur_size = i_size_read(inode); | |
960 | new_isize = nfs_size_to_loff_t(fattr->size); | |
961 | if (cur_size != new_isize && nfsi->npages == 0) | |
962 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
963 | } | |
1da177e4 LT |
964 | |
965 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
966 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
967 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
968 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
969 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
970 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 971 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
972 | |
973 | /* Has the link count changed? */ | |
9e6e70f8 | 974 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 975 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 976 | |
9e6e70f8 | 977 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
978 | invalid |= NFS_INO_INVALID_ATIME; |
979 | ||
980 | if (invalid != 0) | |
981 | nfsi->cache_validity |= invalid; | |
1da177e4 | 982 | |
33801147 | 983 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
984 | return 0; |
985 | } | |
986 | ||
a10ad176 | 987 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 988 | { |
9e6e70f8 TM |
989 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
990 | return 0; | |
a10ad176 TM |
991 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
992 | } | |
993 | ||
994 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
995 | { | |
9e6e70f8 TM |
996 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
997 | return 0; | |
a10ad176 TM |
998 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
999 | } | |
870a5be8 | 1000 | |
ae05f269 | 1001 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1002 | |
1003 | static unsigned long nfs_read_attr_generation_counter(void) | |
1004 | { | |
ae05f269 | 1005 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1006 | } |
1007 | ||
1008 | unsigned long nfs_inc_attr_generation_counter(void) | |
1009 | { | |
ae05f269 | 1010 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1011 | } |
1012 | ||
1013 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1014 | { | |
1015 | fattr->valid = 0; | |
1016 | fattr->time_start = jiffies; | |
1017 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1018 | } | |
1019 | ||
2d36bfde TM |
1020 | struct nfs_fattr *nfs_alloc_fattr(void) |
1021 | { | |
1022 | struct nfs_fattr *fattr; | |
1023 | ||
1024 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1025 | if (fattr != NULL) | |
1026 | nfs_fattr_init(fattr); | |
1027 | return fattr; | |
1028 | } | |
1029 | ||
1030 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1031 | { | |
1032 | struct nfs_fh *fh; | |
1033 | ||
1034 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1035 | if (fh != NULL) | |
1036 | fh->size = 0; | |
1037 | return fh; | |
1038 | } | |
1039 | ||
a10ad176 TM |
1040 | /** |
1041 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1042 | * @inode - pointer to inode | |
1043 | * @fattr - attributes | |
1044 | * | |
1045 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1046 | * attributes got scheduled after another call carrying updated ones. | |
1047 | * | |
1048 | * To do so, the function first assumes that a more recent ctime means | |
1049 | * that the attributes in fattr are newer, however it also attempt to | |
1050 | * catch the case where ctime either didn't change, or went backwards | |
1051 | * (if someone reset the clock on the server) by looking at whether | |
1052 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1053 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1054 | * |
1055 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1056 | * more recent than the ones cached in the inode. | |
1057 | * | |
1058 | */ | |
1059 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1060 | { | |
1061 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1062 | ||
4704f0e2 | 1063 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1064 | nfs_ctime_need_update(inode, fattr) || |
1065 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1066 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1067 | } |
1068 | ||
1069 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1070 | { | |
1071 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1072 | return nfs_update_inode(inode, fattr); |
1073 | return nfs_check_inode_attributes(inode, fattr); | |
1074 | } | |
1075 | ||
33801147 TM |
1076 | /** |
1077 | * nfs_refresh_inode - try to update the inode attribute cache | |
1078 | * @inode - pointer to inode | |
1079 | * @fattr - updated attributes | |
1080 | * | |
1081 | * Check that an RPC call that returned attributes has not overlapped with | |
1082 | * other recent updates of the inode metadata, then decide whether it is | |
1083 | * safe to do a full update of the inode attributes, or whether just to | |
1084 | * call nfs_check_inode_attributes. | |
1085 | */ | |
1086 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1087 | { | |
33801147 TM |
1088 | int status; |
1089 | ||
1090 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1091 | return 0; | |
1092 | spin_lock(&inode->i_lock); | |
870a5be8 | 1093 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1094 | spin_unlock(&inode->i_lock); |
ef79c097 | 1095 | |
33801147 TM |
1096 | return status; |
1097 | } | |
1098 | ||
d65f557f TM |
1099 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1100 | { | |
1101 | struct nfs_inode *nfsi = NFS_I(inode); | |
1102 | ||
1103 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1104 | if (S_ISDIR(inode->i_mode)) | |
1105 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1106 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1107 | return 0; | |
1108 | return nfs_refresh_inode_locked(inode, fattr); | |
1109 | } | |
1110 | ||
decf491f TM |
1111 | /** |
1112 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1113 | * @inode - pointer to inode | |
1114 | * @fattr - updated attributes | |
1115 | * | |
1116 | * After an operation that has changed the inode metadata, mark the | |
1117 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1118 | * |
1119 | * NB: if the server didn't return any post op attributes, this | |
1120 | * function will force the retrieval of attributes before the next | |
1121 | * NFS request. Thus it should be used only for operations that | |
1122 | * are expected to change one or more attributes, to avoid | |
1123 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1124 | */ |
1125 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1126 | { | |
d65f557f | 1127 | int status; |
decf491f | 1128 | |
7668fdbe | 1129 | spin_lock(&inode->i_lock); |
d65f557f | 1130 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1131 | spin_unlock(&inode->i_lock); |
870a5be8 | 1132 | return status; |
decf491f TM |
1133 | } |
1134 | ||
70ca8852 TM |
1135 | /** |
1136 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1137 | * @inode - pointer to inode | |
1138 | * @fattr - updated attributes | |
1139 | * | |
1140 | * After an operation that has changed the inode metadata, mark the | |
1141 | * attribute cache as being invalid, then try to update it. Fake up | |
1142 | * weak cache consistency data, if none exist. | |
1143 | * | |
1144 | * This function is mainly designed to be used by the ->write_done() functions. | |
1145 | */ | |
1146 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1147 | { | |
d65f557f TM |
1148 | int status; |
1149 | ||
1150 | spin_lock(&inode->i_lock); | |
1151 | /* Don't do a WCC update if these attributes are already stale */ | |
1152 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1153 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1154 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1155 | | NFS_ATTR_FATTR_PRESIZE | |
1156 | | NFS_ATTR_FATTR_PREMTIME | |
1157 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1158 | goto out_noforce; |
1159 | } | |
9e6e70f8 TM |
1160 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1161 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
70ca8852 | 1162 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
9e6e70f8 | 1163 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1164 | } |
9e6e70f8 TM |
1165 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1166 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1167 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1168 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1169 | } | |
1170 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1171 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1172 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1173 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1174 | } | |
1175 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1176 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1177 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1178 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1179 | } |
d65f557f TM |
1180 | out_noforce: |
1181 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1182 | spin_unlock(&inode->i_lock); | |
1183 | return status; | |
70ca8852 TM |
1184 | } |
1185 | ||
1da177e4 LT |
1186 | /* |
1187 | * Many nfs protocol calls return the new file attributes after | |
1188 | * an operation. Here we update the inode to reflect the state | |
1189 | * of the server's inode. | |
1190 | * | |
1191 | * This is a bit tricky because we have to make sure all dirty pages | |
1192 | * have been sent off to the server before calling invalidate_inode_pages. | |
1193 | * To make sure no other process adds more write requests while we try | |
1194 | * our best to flush them, we make them sleep during the attribute refresh. | |
1195 | * | |
1196 | * A very similar scenario holds for the dir cache. | |
1197 | */ | |
24aa1fe6 | 1198 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1199 | { |
8b4bdcf8 | 1200 | struct nfs_server *server; |
1da177e4 | 1201 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1202 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1203 | unsigned long invalid = 0; |
3e7d950a | 1204 | unsigned long now = jiffies; |
62ab460c | 1205 | unsigned long save_cache_validity; |
1da177e4 LT |
1206 | |
1207 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
3110ff80 | 1208 | __func__, inode->i_sb->s_id, inode->i_ino, |
1da177e4 LT |
1209 | atomic_read(&inode->i_count), fattr->valid); |
1210 | ||
9e6e70f8 | 1211 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
325cfed9 | 1212 | goto out_fileid; |
1da177e4 LT |
1213 | |
1214 | /* | |
1215 | * Make sure the inode's type hasn't changed. | |
1216 | */ | |
9e6e70f8 | 1217 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1218 | goto out_changed; |
1219 | ||
8b4bdcf8 | 1220 | server = NFS_SERVER(inode); |
a0356862 | 1221 | /* Update the fsid? */ |
9e6e70f8 | 1222 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1223 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1224 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1225 | server->fsid = fattr->fsid; |
1226 | ||
1da177e4 LT |
1227 | /* |
1228 | * Update the read time so we don't revalidate too often. | |
1229 | */ | |
33801147 | 1230 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1231 | |
62ab460c TM |
1232 | save_cache_validity = nfsi->cache_validity; |
1233 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1234 | | NFS_INO_INVALID_ATIME | |
1235 | | NFS_INO_REVAL_FORCED | |
1236 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1237 | |
a895b4a1 | 1238 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1239 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1240 | |
47aabaa7 | 1241 | /* More cache consistency checks */ |
9e6e70f8 TM |
1242 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
1243 | if (nfsi->change_attr != fattr->change_attr) { | |
1244 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
1245 | inode->i_sb->s_id, inode->i_ino); | |
1246 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1247 | if (S_ISDIR(inode->i_mode)) | |
1248 | nfs_force_lookup_revalidate(inode); | |
1249 | nfsi->change_attr = fattr->change_attr; | |
1250 | } | |
62ab460c TM |
1251 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1252 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1253 | |
1254 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
47aabaa7 TM |
1255 | /* NFSv2/v3: Check if the mtime agrees */ |
1256 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { | |
1257 | dprintk("NFS: mtime change on server for file %s/%ld\n", | |
1258 | inode->i_sb->s_id, inode->i_ino); | |
1259 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
bfc69a45 TM |
1260 | if (S_ISDIR(inode->i_mode)) |
1261 | nfs_force_lookup_revalidate(inode); | |
9e6e70f8 | 1262 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
47aabaa7 | 1263 | } |
62ab460c TM |
1264 | } else if (server->caps & NFS_CAP_MTIME) |
1265 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1266 | | NFS_INO_INVALID_DATA | |
1267 | | NFS_INO_REVAL_PAGECACHE | |
1268 | | NFS_INO_REVAL_FORCED); | |
1269 | ||
9e6e70f8 | 1270 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
47aabaa7 | 1271 | /* If ctime has changed we should definitely clear access+acl caches */ |
37d9d76d | 1272 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
4704f0e2 | 1273 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
37d9d76d N |
1274 | /* and probably clear data for a directory too as utimes can cause |
1275 | * havoc with our cache. | |
1276 | */ | |
1277 | if (S_ISDIR(inode->i_mode)) { | |
1278 | invalid |= NFS_INO_INVALID_DATA; | |
1279 | nfs_force_lookup_revalidate(inode); | |
1280 | } | |
9e6e70f8 | 1281 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
37d9d76d | 1282 | } |
62ab460c TM |
1283 | } else if (server->caps & NFS_CAP_CTIME) |
1284 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1285 | | NFS_INO_INVALID_ACCESS | |
1286 | | NFS_INO_INVALID_ACL | |
1287 | | NFS_INO_REVAL_FORCED); | |
47aabaa7 | 1288 | |
951a143b | 1289 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1290 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1291 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1292 | cur_isize = i_size_read(inode); | |
1293 | if (new_isize != cur_isize) { | |
1294 | /* Do we perhaps have any outstanding writes, or has | |
1295 | * the file grown beyond our last write? */ | |
1296 | if (nfsi->npages == 0 || new_isize > cur_isize) { | |
1297 | i_size_write(inode, new_isize); | |
1298 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1299 | } | |
1300 | dprintk("NFS: isize change on server for file %s/%ld\n", | |
1301 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 | 1302 | } |
62ab460c TM |
1303 | } else |
1304 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1305 | | NFS_INO_REVAL_PAGECACHE | |
1306 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1307 | |
1da177e4 | 1308 | |
9e6e70f8 TM |
1309 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1310 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1311 | else if (server->caps & NFS_CAP_ATIME) |
1312 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1313 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1314 | |
9e6e70f8 TM |
1315 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1316 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1317 | umode_t newmode = inode->i_mode & S_IFMT; |
1318 | newmode |= fattr->mode & S_IALLUGO; | |
1319 | inode->i_mode = newmode; | |
9e6e70f8 | 1320 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1321 | } |
62ab460c TM |
1322 | } else if (server->caps & NFS_CAP_MODE) |
1323 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1324 | | NFS_INO_INVALID_ACCESS | |
1325 | | NFS_INO_INVALID_ACL | |
1326 | | NFS_INO_REVAL_FORCED); | |
1327 | ||
9e6e70f8 TM |
1328 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1329 | if (inode->i_uid != fattr->uid) { | |
1330 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1331 | inode->i_uid = fattr->uid; | |
1332 | } | |
62ab460c TM |
1333 | } else if (server->caps & NFS_CAP_OWNER) |
1334 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1335 | | NFS_INO_INVALID_ACCESS | |
1336 | | NFS_INO_INVALID_ACL | |
1337 | | NFS_INO_REVAL_FORCED); | |
1338 | ||
9e6e70f8 TM |
1339 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1340 | if (inode->i_gid != fattr->gid) { | |
1341 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1342 | inode->i_gid = fattr->gid; | |
1343 | } | |
62ab460c TM |
1344 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1345 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1346 | | NFS_INO_INVALID_ACCESS | |
1347 | | NFS_INO_INVALID_ACL | |
1348 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1349 | |
9e6e70f8 TM |
1350 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1351 | if (inode->i_nlink != fattr->nlink) { | |
1352 | invalid |= NFS_INO_INVALID_ATTR; | |
1353 | if (S_ISDIR(inode->i_mode)) | |
1354 | invalid |= NFS_INO_INVALID_DATA; | |
1355 | inode->i_nlink = fattr->nlink; | |
1356 | } | |
62ab460c TM |
1357 | } else if (server->caps & NFS_CAP_NLINK) |
1358 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1359 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1360 | |
9e6e70f8 | 1361 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1362 | /* |
1363 | * report the blocks in 512byte units | |
1364 | */ | |
1365 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1366 | } |
9e6e70f8 TM |
1367 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1368 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1369 | |
1370 | /* Update attrtimeo value if we're out of the unstable period */ | |
1371 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1372 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1373 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1374 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1375 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1376 | } else { |
64672d55 | 1377 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1378 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1379 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1380 | nfsi->attrtimeo_timestamp = now; | |
1381 | } | |
1da177e4 | 1382 | } |
f2115dc9 | 1383 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1384 | /* Don't invalidate the data if we were to blame */ |
1385 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1386 | || S_ISLNK(inode->i_mode))) | |
1387 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce | 1388 | if (!nfs_have_delegation(inode, FMODE_READ) || |
62ab460c | 1389 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1390 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1391 | |
1392 | return 0; | |
1393 | out_changed: | |
1394 | /* | |
1395 | * Big trouble! The inode has become a different object. | |
1396 | */ | |
1da177e4 | 1397 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
3110ff80 | 1398 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
b37b03b7 | 1399 | out_err: |
1da177e4 LT |
1400 | /* |
1401 | * No need to worry about unhashing the dentry, as the | |
1402 | * lookup validation will know that the inode is bad. | |
1403 | * (But we fall through to invalidate the caches.) | |
1404 | */ | |
1405 | nfs_invalidate_inode(inode); | |
1da177e4 | 1406 | return -ESTALE; |
325cfed9 CL |
1407 | |
1408 | out_fileid: | |
1409 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1410 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
54ceac45 | 1411 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
325cfed9 CL |
1412 | (long long)nfsi->fileid, (long long)fattr->fileid); |
1413 | goto out_err; | |
1da177e4 LT |
1414 | } |
1415 | ||
55a97593 | 1416 | |
1da177e4 LT |
1417 | #ifdef CONFIG_NFS_V4 |
1418 | ||
1da177e4 LT |
1419 | /* |
1420 | * Clean out any remaining NFSv4 state that might be left over due | |
1421 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1422 | * nfs_open(). | |
1423 | */ | |
b57922d9 | 1424 | void nfs4_evict_inode(struct inode *inode) |
1da177e4 | 1425 | { |
4541d16c | 1426 | pnfs_destroy_layout(NFS_I(inode)); |
b57922d9 AV |
1427 | truncate_inode_pages(&inode->i_data, 0); |
1428 | end_writeback(inode); | |
1da177e4 | 1429 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1430 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1431 | /* First call standard NFS clear_inode() code */ |
1432 | nfs_clear_inode(inode); | |
1da177e4 | 1433 | } |
1da177e4 LT |
1434 | #endif |
1435 | ||
f7b422b1 | 1436 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1437 | { |
1438 | struct nfs_inode *nfsi; | |
e94b1766 | 1439 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1440 | if (!nfsi) |
1441 | return NULL; | |
55296809 CL |
1442 | nfsi->flags = 0UL; |
1443 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1444 | #ifdef CONFIG_NFS_V3_ACL |
1445 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1446 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1447 | #endif | |
e50a1c2e BF |
1448 | #ifdef CONFIG_NFS_V4 |
1449 | nfsi->nfs4_acl = NULL; | |
1450 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1451 | return &nfsi->vfs_inode; |
1452 | } | |
1453 | ||
fa0d7e3d | 1454 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1455 | { |
fa0d7e3d NP |
1456 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1457 | INIT_LIST_HEAD(&inode->i_dentry); | |
1da177e4 LT |
1458 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1459 | } | |
1460 | ||
fa0d7e3d NP |
1461 | void nfs_destroy_inode(struct inode *inode) |
1462 | { | |
1463 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1464 | } | |
1465 | ||
d75d5414 AM |
1466 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1467 | { | |
1468 | #ifdef CONFIG_NFS_V4 | |
1469 | INIT_LIST_HEAD(&nfsi->open_states); | |
1470 | nfsi->delegation = NULL; | |
1471 | nfsi->delegation_state = 0; | |
1472 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1473 | nfsi->layout = NULL; |
d75d5414 AM |
1474 | #endif |
1475 | } | |
f7b422b1 | 1476 | |
51cc5068 | 1477 | static void init_once(void *foo) |
1da177e4 LT |
1478 | { |
1479 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1480 | ||
a35afb83 | 1481 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1482 | INIT_LIST_HEAD(&nfsi->open_files); |
1483 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1484 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
1485 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
a35afb83 | 1486 | nfsi->npages = 0; |
ff778d02 | 1487 | nfsi->ncommit = 0; |
565277f6 TM |
1488 | atomic_set(&nfsi->silly_count, 1); |
1489 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1490 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1491 | nfs4_init_once(nfsi); |
1da177e4 | 1492 | } |
20c2df83 | 1493 | |
f7b422b1 | 1494 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1495 | { |
1496 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1497 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1498 | 0, (SLAB_RECLAIM_ACCOUNT| |
1499 | SLAB_MEM_SPREAD), | |
20c2df83 | 1500 | init_once); |
1da177e4 LT |
1501 | if (nfs_inode_cachep == NULL) |
1502 | return -ENOMEM; | |
1503 | ||
1504 | return 0; | |
1505 | } | |
1506 | ||
266bee88 | 1507 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1508 | { |
1a1d92c1 | 1509 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1510 | } |
1511 | ||
5746006f TM |
1512 | struct workqueue_struct *nfsiod_workqueue; |
1513 | ||
1514 | /* | |
1515 | * start up the nfsiod workqueue | |
1516 | */ | |
1517 | static int nfsiod_start(void) | |
1518 | { | |
1519 | struct workqueue_struct *wq; | |
1520 | dprintk("RPC: creating workqueue nfsiod\n"); | |
60958892 | 1521 | wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0); |
5746006f TM |
1522 | if (wq == NULL) |
1523 | return -ENOMEM; | |
1524 | nfsiod_workqueue = wq; | |
1525 | return 0; | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * Destroy the nfsiod workqueue | |
1530 | */ | |
1531 | static void nfsiod_stop(void) | |
1532 | { | |
1533 | struct workqueue_struct *wq; | |
1534 | ||
1535 | wq = nfsiod_workqueue; | |
1536 | if (wq == NULL) | |
1537 | return; | |
1538 | nfsiod_workqueue = NULL; | |
1539 | destroy_workqueue(wq); | |
1540 | } | |
1541 | ||
1da177e4 LT |
1542 | /* |
1543 | * Initialize NFS | |
1544 | */ | |
1545 | static int __init init_nfs_fs(void) | |
1546 | { | |
1547 | int err; | |
1548 | ||
955a857e BS |
1549 | err = nfs_idmap_init(); |
1550 | if (err < 0) | |
1551 | goto out9; | |
1552 | ||
e571cbf1 TM |
1553 | err = nfs_dns_resolver_init(); |
1554 | if (err < 0) | |
1555 | goto out8; | |
1556 | ||
8ec442ae DH |
1557 | err = nfs_fscache_register(); |
1558 | if (err < 0) | |
1559 | goto out7; | |
1560 | ||
5746006f TM |
1561 | err = nfsiod_start(); |
1562 | if (err) | |
1563 | goto out6; | |
1564 | ||
6aaca566 DH |
1565 | err = nfs_fs_proc_init(); |
1566 | if (err) | |
1567 | goto out5; | |
1568 | ||
1da177e4 LT |
1569 | err = nfs_init_nfspagecache(); |
1570 | if (err) | |
1571 | goto out4; | |
1572 | ||
1573 | err = nfs_init_inodecache(); | |
1574 | if (err) | |
1575 | goto out3; | |
1576 | ||
1577 | err = nfs_init_readpagecache(); | |
1578 | if (err) | |
1579 | goto out2; | |
1580 | ||
1581 | err = nfs_init_writepagecache(); | |
1582 | if (err) | |
1583 | goto out1; | |
1584 | ||
1da177e4 LT |
1585 | err = nfs_init_directcache(); |
1586 | if (err) | |
1587 | goto out0; | |
1da177e4 LT |
1588 | |
1589 | #ifdef CONFIG_PROC_FS | |
1590 | rpc_proc_register(&nfs_rpcstat); | |
1591 | #endif | |
f7b422b1 | 1592 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1593 | goto out; |
1594 | return 0; | |
1595 | out: | |
1596 | #ifdef CONFIG_PROC_FS | |
1597 | rpc_proc_unregister("nfs"); | |
1598 | #endif | |
1da177e4 | 1599 | nfs_destroy_directcache(); |
6b59a754 | 1600 | out0: |
6b59a754 | 1601 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1602 | out1: |
1603 | nfs_destroy_readpagecache(); | |
1604 | out2: | |
1605 | nfs_destroy_inodecache(); | |
1606 | out3: | |
1607 | nfs_destroy_nfspagecache(); | |
1608 | out4: | |
6aaca566 DH |
1609 | nfs_fs_proc_exit(); |
1610 | out5: | |
5746006f TM |
1611 | nfsiod_stop(); |
1612 | out6: | |
8ec442ae DH |
1613 | nfs_fscache_unregister(); |
1614 | out7: | |
e571cbf1 TM |
1615 | nfs_dns_resolver_destroy(); |
1616 | out8: | |
955a857e BS |
1617 | nfs_idmap_quit(); |
1618 | out9: | |
1da177e4 LT |
1619 | return err; |
1620 | } | |
1621 | ||
1622 | static void __exit exit_nfs_fs(void) | |
1623 | { | |
1da177e4 | 1624 | nfs_destroy_directcache(); |
1da177e4 LT |
1625 | nfs_destroy_writepagecache(); |
1626 | nfs_destroy_readpagecache(); | |
1627 | nfs_destroy_inodecache(); | |
1628 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1629 | nfs_fscache_unregister(); |
e571cbf1 | 1630 | nfs_dns_resolver_destroy(); |
955a857e | 1631 | nfs_idmap_quit(); |
1da177e4 LT |
1632 | #ifdef CONFIG_PROC_FS |
1633 | rpc_proc_unregister("nfs"); | |
1634 | #endif | |
f4eecd5d | 1635 | nfs_cleanup_cb_ident_idr(); |
f7b422b1 | 1636 | unregister_nfs_fs(); |
6aaca566 | 1637 | nfs_fs_proc_exit(); |
5746006f | 1638 | nfsiod_stop(); |
1da177e4 LT |
1639 | } |
1640 | ||
1641 | /* Not quite true; I just maintain it */ | |
1642 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1643 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1644 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1645 | |
1646 | module_init(init_nfs_fs) | |
1647 | module_exit(exit_nfs_fs) |