]>
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> |
d310310c | 41 | #include <linux/freezer.h> |
1da177e4 LT |
42 | |
43 | #include <asm/system.h> | |
44 | #include <asm/uaccess.h> | |
45 | ||
4ce79717 | 46 | #include "nfs4_fs.h" |
a72b4422 | 47 | #include "callback.h" |
1da177e4 | 48 | #include "delegation.h" |
d9ef5a8c | 49 | #include "iostat.h" |
f7b422b1 | 50 | #include "internal.h" |
8ec442ae | 51 | #include "fscache.h" |
e571cbf1 | 52 | #include "dns_resolve.h" |
e5e94017 | 53 | #include "pnfs.h" |
1b340d01 | 54 | #include "netns.h" |
1da177e4 LT |
55 | |
56 | #define NFSDBG_FACILITY NFSDBG_VFS | |
1da177e4 | 57 | |
f43bf0be TM |
58 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
59 | ||
60 | /* Default is to see 64-bit inode numbers */ | |
90ab5ee9 | 61 | static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
f43bf0be | 62 | |
1da177e4 | 63 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 64 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 65 | |
e18b890b | 66 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 67 | |
1da177e4 LT |
68 | static inline unsigned long |
69 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
70 | { | |
71 | return nfs_fileid_to_ino_t(fattr->fileid); | |
72 | } | |
73 | ||
72cb77f4 TM |
74 | /** |
75 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
76 | * @word: long word containing the bit lock | |
77 | */ | |
78 | int nfs_wait_bit_killable(void *word) | |
79 | { | |
80 | if (fatal_signal_pending(current)) | |
81 | return -ERESTARTSYS; | |
d310310c | 82 | freezable_schedule(); |
72cb77f4 TM |
83 | return 0; |
84 | } | |
85 | ||
f43bf0be TM |
86 | /** |
87 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
88 | * @fileid: 64-bit fileid | |
89 | * | |
90 | * This function returns a 32-bit inode number if the boot parameter | |
91 | * nfs.enable_ino64 is zero. | |
92 | */ | |
93 | u64 nfs_compat_user_ino64(u64 fileid) | |
94 | { | |
3fa0b4e2 FF |
95 | #ifdef CONFIG_COMPAT |
96 | compat_ulong_t ino; | |
97 | #else | |
98 | unsigned long ino; | |
99 | #endif | |
f43bf0be TM |
100 | |
101 | if (enable_ino64) | |
102 | return fileid; | |
103 | ino = fileid; | |
104 | if (sizeof(ino) < sizeof(fileid)) | |
105 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
106 | return ino; | |
107 | } | |
108 | ||
b57922d9 | 109 | static void nfs_clear_inode(struct inode *inode) |
1da177e4 | 110 | { |
da6d503a TM |
111 | /* |
112 | * The following should never happen... | |
113 | */ | |
114 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 115 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 116 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 117 | nfs_access_zap_cache(inode); |
ef79c097 | 118 | nfs_fscache_release_inode_cookie(inode); |
1da177e4 LT |
119 | } |
120 | ||
b57922d9 AV |
121 | void nfs_evict_inode(struct inode *inode) |
122 | { | |
123 | truncate_inode_pages(&inode->i_data, 0); | |
124 | end_writeback(inode); | |
125 | nfs_clear_inode(inode); | |
126 | } | |
127 | ||
29884df0 TM |
128 | /** |
129 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
130 | */ | |
131 | int nfs_sync_mapping(struct address_space *mapping) | |
132 | { | |
5cf95214 | 133 | int ret = 0; |
29884df0 | 134 | |
5cf95214 TM |
135 | if (mapping->nrpages != 0) { |
136 | unmap_mapping_range(mapping, 0, 0, 0); | |
137 | ret = nfs_wb_all(mapping->host); | |
138 | } | |
29884df0 TM |
139 | return ret; |
140 | } | |
141 | ||
1da177e4 LT |
142 | /* |
143 | * Invalidate the local caches | |
144 | */ | |
b37b03b7 | 145 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
146 | { |
147 | struct nfs_inode *nfsi = NFS_I(inode); | |
148 | int mode = inode->i_mode; | |
149 | ||
91d5b470 CL |
150 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
151 | ||
c7c20973 TM |
152 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
153 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 LT |
154 | |
155 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
156 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 157 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 158 | else |
55296809 | 159 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 160 | } |
dc59250c | 161 | |
b37b03b7 TM |
162 | void nfs_zap_caches(struct inode *inode) |
163 | { | |
164 | spin_lock(&inode->i_lock); | |
165 | nfs_zap_caches_locked(inode); | |
dc59250c | 166 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
167 | } |
168 | ||
cd9ae2b6 TM |
169 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
170 | { | |
171 | if (mapping->nrpages != 0) { | |
172 | spin_lock(&inode->i_lock); | |
173 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
174 | spin_unlock(&inode->i_lock); | |
175 | } | |
176 | } | |
177 | ||
f41f7418 | 178 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
179 | { |
180 | void (*clear_acl_cache)(struct inode *); | |
181 | ||
182 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
183 | if (clear_acl_cache != NULL) | |
184 | clear_acl_cache(inode); | |
dc59250c | 185 | spin_lock(&inode->i_lock); |
55296809 | 186 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 187 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
188 | } |
189 | ||
c4812998 TM |
190 | void nfs_invalidate_atime(struct inode *inode) |
191 | { | |
192 | spin_lock(&inode->i_lock); | |
193 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
194 | spin_unlock(&inode->i_lock); | |
195 | } | |
196 | ||
1da177e4 | 197 | /* |
b37b03b7 TM |
198 | * Invalidate, but do not unhash, the inode. |
199 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 200 | */ |
b37b03b7 | 201 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 202 | { |
3a10c30a | 203 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 204 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
205 | } |
206 | ||
207 | struct nfs_find_desc { | |
208 | struct nfs_fh *fh; | |
209 | struct nfs_fattr *fattr; | |
210 | }; | |
211 | ||
212 | /* | |
213 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
214 | * this, and re-exported directories (also seen in NFSv2) | |
215 | * we are forced to allow 2 different inodes to have the same | |
216 | * i_ino. | |
217 | */ | |
218 | static int | |
219 | nfs_find_actor(struct inode *inode, void *opaque) | |
220 | { | |
221 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
222 | struct nfs_fh *fh = desc->fh; | |
223 | struct nfs_fattr *fattr = desc->fattr; | |
224 | ||
225 | if (NFS_FILEID(inode) != fattr->fileid) | |
226 | return 0; | |
227 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
228 | return 0; | |
229 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
230 | return 0; | |
231 | return 1; | |
232 | } | |
233 | ||
234 | static int | |
235 | nfs_init_locked(struct inode *inode, void *opaque) | |
236 | { | |
237 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
238 | struct nfs_fattr *fattr = desc->fattr; | |
239 | ||
99fadcd7 | 240 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
241 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
242 | return 0; | |
243 | } | |
244 | ||
1da177e4 LT |
245 | /* |
246 | * This is our front-end to iget that looks up inodes by file handle | |
247 | * instead of inode number. | |
248 | */ | |
249 | struct inode * | |
250 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
251 | { | |
252 | struct nfs_find_desc desc = { | |
253 | .fh = fh, | |
254 | .fattr = fattr | |
255 | }; | |
03f28e3a | 256 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
257 | unsigned long hash; |
258 | ||
7ebb9315 BS |
259 | nfs_attr_check_mountpoint(sb, fattr); |
260 | ||
533eb461 AA |
261 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
262 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 263 | goto out_no_inode; |
9e6e70f8 | 264 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 265 | goto out_no_inode; |
1da177e4 LT |
266 | |
267 | hash = nfs_fattr_to_ino_t(fattr); | |
268 | ||
03f28e3a TM |
269 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
270 | if (inode == NULL) { | |
271 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 272 | goto out_no_inode; |
03f28e3a | 273 | } |
1da177e4 LT |
274 | |
275 | if (inode->i_state & I_NEW) { | |
276 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 277 | unsigned long now = jiffies; |
1da177e4 LT |
278 | |
279 | /* We set i_ino for the few things that still rely on it, | |
280 | * such as stat(2) */ | |
281 | inode->i_ino = hash; | |
282 | ||
283 | /* We can't support update_atime(), since the server will reset it */ | |
284 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
285 | inode->i_mode = fattr->mode; | |
62ab460c TM |
286 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
287 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
288 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
289 | | NFS_INO_INVALID_ACCESS | |
290 | | NFS_INO_INVALID_ACL; | |
1da177e4 LT |
291 | /* Why so? Because we want revalidate for devices/FIFOs, and |
292 | * that's precisely what we have in nfs_file_inode_operations. | |
293 | */ | |
8fa5c000 | 294 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 295 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 296 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 LT |
297 | inode->i_data.a_ops = &nfs_file_aops; |
298 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
299 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 300 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 301 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 302 | inode->i_data.a_ops = &nfs_dir_aops; |
0715dc63 | 303 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)) |
3a10c30a | 304 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
55a97593 | 305 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
306 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
307 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
308 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
309 | inode->i_op = &nfs_referral_inode_operations; | |
310 | else | |
311 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 312 | inode->i_fop = NULL; |
36d43a43 | 313 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 314 | } |
1da177e4 LT |
315 | } else if (S_ISLNK(inode->i_mode)) |
316 | inode->i_op = &nfs_symlink_inode_operations; | |
317 | else | |
318 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
319 | ||
9e6e70f8 TM |
320 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
321 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
322 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 323 | inode->i_version = 0; |
9e6e70f8 | 324 | inode->i_size = 0; |
6d6b77f1 | 325 | clear_nlink(inode); |
9e6e70f8 TM |
326 | inode->i_uid = -2; |
327 | inode->i_gid = -2; | |
328 | inode->i_blocks = 0; | |
329 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
330 | ||
33801147 | 331 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 332 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
333 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
334 | inode->i_atime = fattr->atime; | |
62ab460c TM |
335 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
336 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
337 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
338 | inode->i_mtime = fattr->mtime; | |
62ab460c TM |
339 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
340 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
341 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
342 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
343 | inode->i_ctime = fattr->ctime; | |
62ab460c TM |
344 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
345 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
346 | | NFS_INO_INVALID_ACCESS | |
347 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 | 348 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 349 | inode->i_version = fattr->change_attr; |
62ab460c TM |
350 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
351 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
352 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
353 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
354 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
355 | else |
356 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
357 | | NFS_INO_INVALID_DATA | |
358 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 | 359 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 360 | set_nlink(inode, fattr->nlink); |
62ab460c TM |
361 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
362 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
363 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
364 | inode->i_uid = fattr->uid; | |
62ab460c TM |
365 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
366 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
367 | | NFS_INO_INVALID_ACCESS | |
368 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
369 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
370 | inode->i_gid = fattr->gid; | |
62ab460c TM |
371 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
372 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
373 | | NFS_INO_INVALID_ACCESS | |
374 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
375 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
376 | inode->i_blocks = fattr->du.nfs2.blocks; | |
377 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
378 | /* |
379 | * report the blocks in 512byte units | |
380 | */ | |
381 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
382 | } |
383 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 384 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 385 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 386 | |
ef79c097 DH |
387 | nfs_fscache_init_inode_cookie(inode); |
388 | ||
1da177e4 LT |
389 | unlock_new_inode(inode); |
390 | } else | |
391 | nfs_refresh_inode(inode, fattr); | |
392 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
393 | inode->i_sb->s_id, | |
394 | (long long)NFS_FILEID(inode), | |
395 | atomic_read(&inode->i_count)); | |
396 | ||
397 | out: | |
398 | return inode; | |
399 | ||
400 | out_no_inode: | |
03f28e3a | 401 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
402 | goto out; |
403 | } | |
404 | ||
659bfcd6 | 405 | #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 |
406 | |
407 | int | |
408 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
409 | { | |
410 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
411 | struct nfs_fattr *fattr; |
412 | int error = -ENOMEM; | |
1da177e4 | 413 | |
91d5b470 CL |
414 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
415 | ||
188b95dd JL |
416 | /* skip mode change if it's just for clearing setuid/setgid */ |
417 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
418 | attr->ia_valid &= ~ATTR_MODE; | |
419 | ||
1da177e4 LT |
420 | if (attr->ia_valid & ATTR_SIZE) { |
421 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
422 | attr->ia_valid &= ~ATTR_SIZE; | |
423 | } | |
424 | ||
425 | /* Optimization: if the end result is no change, don't RPC */ | |
426 | attr->ia_valid &= NFS_VALID_ATTRS; | |
659bfcd6 | 427 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
1da177e4 LT |
428 | return 0; |
429 | ||
755c1e20 | 430 | /* Write all dirty data */ |
1b924e5f | 431 | if (S_ISREG(inode->i_mode)) |
e1552e19 | 432 | nfs_wb_all(inode); |
987f8dfc TM |
433 | |
434 | fattr = nfs_alloc_fattr(); | |
435 | if (fattr == NULL) | |
436 | goto out; | |
642ac549 TM |
437 | /* |
438 | * Return any delegations if we're going to change ACLs | |
439 | */ | |
440 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
441 | nfs_inode_return_delegation(inode); | |
987f8dfc | 442 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 443 | if (error == 0) |
987f8dfc TM |
444 | nfs_refresh_inode(inode, fattr); |
445 | nfs_free_fattr(fattr); | |
446 | out: | |
65e4308d TM |
447 | return error; |
448 | } | |
449 | ||
a3d01454 TM |
450 | /** |
451 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
452 | * @inode: inode of the file used | |
453 | * @offset: file offset to start truncating | |
454 | * | |
455 | * This is a copy of the common vmtruncate, but with the locking | |
456 | * corrected to take into account the fact that NFS requires | |
457 | * inode->i_size to be updated under the inode->i_lock. | |
458 | */ | |
459 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
460 | { | |
c08d3b0e | 461 | loff_t oldsize; |
462 | int err; | |
a3d01454 | 463 | |
c08d3b0e | 464 | err = inode_newsize_ok(inode, offset); |
465 | if (err) | |
466 | goto out; | |
a3d01454 | 467 | |
c08d3b0e | 468 | spin_lock(&inode->i_lock); |
469 | oldsize = inode->i_size; | |
470 | i_size_write(inode, offset); | |
471 | spin_unlock(&inode->i_lock); | |
472 | ||
473 | truncate_pagecache(inode, oldsize, offset); | |
474 | out: | |
475 | return err; | |
a3d01454 TM |
476 | } |
477 | ||
65e4308d TM |
478 | /** |
479 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
480 | * @inode: pointer to struct inode | |
481 | * @attr: pointer to struct iattr | |
482 | * | |
483 | * Note: we do this in the *proc.c in order to ensure that | |
484 | * it works for things like exclusive creates too. | |
485 | */ | |
486 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
487 | { | |
488 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 489 | spin_lock(&inode->i_lock); |
1da177e4 | 490 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
491 | int mode = attr->ia_mode & S_IALLUGO; |
492 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
493 | inode->i_mode = mode; |
494 | } | |
495 | if ((attr->ia_valid & ATTR_UID) != 0) | |
496 | inode->i_uid = attr->ia_uid; | |
497 | if ((attr->ia_valid & ATTR_GID) != 0) | |
498 | inode->i_gid = attr->ia_gid; | |
55296809 | 499 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 500 | spin_unlock(&inode->i_lock); |
65e4308d TM |
501 | } |
502 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 503 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 504 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 505 | } |
1da177e4 LT |
506 | } |
507 | ||
1da177e4 LT |
508 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
509 | { | |
510 | struct inode *inode = dentry->d_inode; | |
55296809 | 511 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
512 | int err; |
513 | ||
acdc53b2 | 514 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 515 | if (S_ISREG(inode->i_mode)) { |
acdc53b2 TM |
516 | err = filemap_write_and_wait(inode->i_mapping); |
517 | if (err) | |
518 | goto out; | |
28c494c5 | 519 | } |
fc33a7bb CH |
520 | |
521 | /* | |
522 | * We may force a getattr if the user cares about atime. | |
523 | * | |
524 | * Note that we only have to check the vfsmount flags here: | |
525 | * - NFS always sets S_NOATIME by so checking it would give a | |
526 | * bogus result | |
527 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
528 | * no point in checking those. | |
529 | */ | |
530 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
531 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 532 | need_atime = 0; |
fc33a7bb | 533 | |
1da177e4 LT |
534 | if (need_atime) |
535 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
536 | else | |
537 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 538 | if (!err) { |
1da177e4 | 539 | generic_fillattr(inode, stat); |
f43bf0be | 540 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 541 | } |
acdc53b2 | 542 | out: |
1da177e4 LT |
543 | return err; |
544 | } | |
545 | ||
f11ac8db TM |
546 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
547 | { | |
548 | atomic_set(&l_ctx->count, 1); | |
549 | l_ctx->lockowner = current->files; | |
550 | l_ctx->pid = current->tgid; | |
551 | INIT_LIST_HEAD(&l_ctx->list); | |
552 | } | |
553 | ||
554 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
555 | { | |
556 | struct nfs_lock_context *pos; | |
557 | ||
558 | list_for_each_entry(pos, &ctx->lock_context.list, list) { | |
559 | if (pos->lockowner != current->files) | |
560 | continue; | |
561 | if (pos->pid != current->tgid) | |
562 | continue; | |
563 | atomic_inc(&pos->count); | |
564 | return pos; | |
565 | } | |
566 | return NULL; | |
567 | } | |
568 | ||
569 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
570 | { | |
571 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 572 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
573 | |
574 | spin_lock(&inode->i_lock); | |
575 | res = __nfs_find_lock_context(ctx); | |
576 | if (res == NULL) { | |
577 | spin_unlock(&inode->i_lock); | |
578 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
579 | if (new == NULL) | |
580 | return NULL; | |
581 | nfs_init_lock_context(new); | |
582 | spin_lock(&inode->i_lock); | |
583 | res = __nfs_find_lock_context(ctx); | |
584 | if (res == NULL) { | |
585 | list_add_tail(&new->list, &ctx->lock_context.list); | |
586 | new->open_context = ctx; | |
587 | res = new; | |
588 | new = NULL; | |
589 | } | |
590 | } | |
591 | spin_unlock(&inode->i_lock); | |
592 | kfree(new); | |
593 | return res; | |
594 | } | |
595 | ||
596 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
597 | { | |
598 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 599 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
600 | |
601 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
602 | return; | |
603 | list_del(&l_ctx->list); | |
604 | spin_unlock(&inode->i_lock); | |
605 | kfree(l_ctx); | |
606 | } | |
607 | ||
7fe5c398 TM |
608 | /** |
609 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
610 | * @ctx: pointer to context | |
611 | * @is_sync: is this a synchronous close | |
612 | * | |
613 | * always ensure that the attributes are up to date if we're mounted | |
614 | * with close-to-open semantics | |
615 | */ | |
616 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
617 | { | |
618 | struct inode *inode; | |
619 | struct nfs_server *server; | |
620 | ||
621 | if (!(ctx->mode & FMODE_WRITE)) | |
622 | return; | |
623 | if (!is_sync) | |
624 | return; | |
3d4ff43d | 625 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
626 | if (!list_empty(&NFS_I(inode)->open_files)) |
627 | return; | |
628 | server = NFS_SERVER(inode); | |
629 | if (server->flags & NFS_MOUNT_NOCTO) | |
630 | return; | |
631 | nfs_revalidate_inode(server, inode); | |
632 | } | |
633 | ||
5ede7b1c | 634 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
635 | { |
636 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
637 | struct rpc_cred *cred = rpc_lookup_cred(); |
638 | if (IS_ERR(cred)) | |
639 | return ERR_CAST(cred); | |
1da177e4 | 640 | |
f52720ca | 641 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
642 | if (!ctx) { |
643 | put_rpccred(cred); | |
644 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 645 | } |
5ede7b1c AV |
646 | nfs_sb_active(dentry->d_sb); |
647 | ctx->dentry = dget(dentry); | |
648 | ctx->cred = cred; | |
649 | ctx->state = NULL; | |
650 | ctx->mode = f_mode; | |
651 | ctx->flags = 0; | |
652 | ctx->error = 0; | |
653 | nfs_init_lock_context(&ctx->lock_context); | |
654 | ctx->lock_context.open_context = ctx; | |
655 | INIT_LIST_HEAD(&ctx->list); | |
1da177e4 LT |
656 | return ctx; |
657 | } | |
658 | ||
659 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
660 | { | |
661 | if (ctx != NULL) | |
f11ac8db | 662 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
663 | return ctx; |
664 | } | |
665 | ||
7fe5c398 | 666 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 667 | { |
3d4ff43d AV |
668 | struct inode *inode = ctx->dentry->d_inode; |
669 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 670 | |
5c78f58e | 671 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
672 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
673 | return; | |
674 | list_del(&ctx->list); | |
675 | spin_unlock(&inode->i_lock); | |
ef84303e | 676 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 677 | return; |
5c78f58e TM |
678 | if (inode != NULL) |
679 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
680 | if (ctx->cred != NULL) |
681 | put_rpccred(ctx->cred); | |
3d4ff43d AV |
682 | dput(ctx->dentry); |
683 | nfs_sb_deactive(sb); | |
3bec63db TM |
684 | kfree(ctx); |
685 | } | |
686 | ||
a49c3c77 TM |
687 | void put_nfs_open_context(struct nfs_open_context *ctx) |
688 | { | |
689 | __put_nfs_open_context(ctx, 0); | |
690 | } | |
691 | ||
1da177e4 LT |
692 | /* |
693 | * Ensure that mmap has a recent RPC credential for use when writing out | |
694 | * shared pages | |
695 | */ | |
cd9a1c0e | 696 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 697 | { |
01cce933 | 698 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
699 | struct nfs_inode *nfsi = NFS_I(inode); |
700 | ||
701 | filp->private_data = get_nfs_open_context(ctx); | |
702 | spin_lock(&inode->i_lock); | |
703 | list_add(&ctx->list, &nfsi->open_files); | |
704 | spin_unlock(&inode->i_lock); | |
705 | } | |
706 | ||
d530838b TM |
707 | /* |
708 | * Given an inode, search for an open context with the desired characteristics | |
709 | */ | |
dc0b027d | 710 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
711 | { |
712 | struct nfs_inode *nfsi = NFS_I(inode); | |
713 | struct nfs_open_context *pos, *ctx = NULL; | |
714 | ||
715 | spin_lock(&inode->i_lock); | |
716 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
717 | if (cred != NULL && pos->cred != cred) |
718 | continue; | |
1544fa0f TM |
719 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
720 | continue; | |
721 | ctx = get_nfs_open_context(pos); | |
722 | break; | |
1da177e4 LT |
723 | } |
724 | spin_unlock(&inode->i_lock); | |
725 | return ctx; | |
726 | } | |
727 | ||
b92dccf6 | 728 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 729 | { |
01cce933 | 730 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 731 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
732 | |
733 | if (ctx) { | |
734 | filp->private_data = NULL; | |
735 | spin_lock(&inode->i_lock); | |
736 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
737 | spin_unlock(&inode->i_lock); | |
f895c53f | 738 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
739 | } |
740 | } | |
741 | ||
742 | /* | |
743 | * These allocate and release file read/write context information. | |
744 | */ | |
745 | int nfs_open(struct inode *inode, struct file *filp) | |
746 | { | |
747 | struct nfs_open_context *ctx; | |
1da177e4 | 748 | |
5ede7b1c AV |
749 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
750 | if (IS_ERR(ctx)) | |
751 | return PTR_ERR(ctx); | |
1da177e4 LT |
752 | nfs_file_set_open_context(filp, ctx); |
753 | put_nfs_open_context(ctx); | |
ef79c097 | 754 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
755 | return 0; |
756 | } | |
757 | ||
758 | int nfs_release(struct inode *inode, struct file *filp) | |
759 | { | |
1da177e4 LT |
760 | nfs_file_clear_open_context(filp); |
761 | return 0; | |
762 | } | |
763 | ||
764 | /* | |
765 | * This function is called whenever some part of NFS notices that | |
766 | * the cached attributes have to be refreshed. | |
767 | */ | |
768 | int | |
769 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
770 | { | |
771 | int status = -ESTALE; | |
a3cba2aa | 772 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 773 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
774 | |
775 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
776 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
777 | ||
85233a7a | 778 | if (is_bad_inode(inode)) |
691beb13 | 779 | goto out; |
1da177e4 | 780 | if (NFS_STALE(inode)) |
412d582e | 781 | goto out; |
7fdc49c4 | 782 | |
a3cba2aa TM |
783 | status = -ENOMEM; |
784 | fattr = nfs_alloc_fattr(); | |
785 | if (fattr == NULL) | |
786 | goto out; | |
787 | ||
691beb13 | 788 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
a3cba2aa | 789 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
1da177e4 LT |
790 | if (status != 0) { |
791 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
792 | inode->i_sb->s_id, | |
793 | (long long)NFS_FILEID(inode), status); | |
794 | if (status == -ESTALE) { | |
795 | nfs_zap_caches(inode); | |
796 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 797 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
798 | } |
799 | goto out; | |
800 | } | |
801 | ||
a3cba2aa | 802 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
803 | if (status) { |
804 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
805 | inode->i_sb->s_id, | |
806 | (long long)NFS_FILEID(inode), status); | |
807 | goto out; | |
808 | } | |
55296809 | 809 | |
24aa1fe6 | 810 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 811 | nfs_zap_acl_cache(inode); |
55296809 | 812 | |
1da177e4 LT |
813 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
814 | inode->i_sb->s_id, | |
815 | (long long)NFS_FILEID(inode)); | |
816 | ||
412d582e | 817 | out: |
a3cba2aa | 818 | nfs_free_fattr(fattr); |
1da177e4 LT |
819 | return status; |
820 | } | |
821 | ||
822 | int nfs_attribute_timeout(struct inode *inode) | |
823 | { | |
824 | struct nfs_inode *nfsi = NFS_I(inode); | |
825 | ||
d7cf8dd0 TM |
826 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
827 | } | |
828 | ||
829 | static int nfs_attribute_cache_expired(struct inode *inode) | |
830 | { | |
b4d2314b | 831 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 832 | return 0; |
d7cf8dd0 | 833 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
834 | } |
835 | ||
836 | /** | |
837 | * nfs_revalidate_inode - Revalidate the inode attributes | |
838 | * @server - pointer to nfs_server struct | |
839 | * @inode - pointer to inode struct | |
840 | * | |
841 | * Updates inode attribute information by retrieving the data from the server. | |
842 | */ | |
843 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
844 | { | |
44b11874 | 845 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
d7cf8dd0 | 846 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
847 | return NFS_STALE(inode) ? -ESTALE : 0; |
848 | return __nfs_revalidate_inode(server, inode); | |
849 | } | |
850 | ||
1cda707d | 851 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
852 | { |
853 | struct nfs_inode *nfsi = NFS_I(inode); | |
854 | ||
855 | if (mapping->nrpages != 0) { | |
856 | int ret = invalidate_inode_pages2(mapping); | |
857 | if (ret < 0) | |
858 | return ret; | |
859 | } | |
860 | spin_lock(&inode->i_lock); | |
861 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 862 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 863 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
864 | spin_unlock(&inode->i_lock); |
865 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 866 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
867 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
868 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
869 | return 0; | |
870 | } | |
871 | ||
717d44e8 TM |
872 | /** |
873 | * nfs_revalidate_mapping - Revalidate the pagecache | |
874 | * @inode - pointer to host inode | |
875 | * @mapping - pointer to mapping | |
717d44e8 TM |
876 | */ |
877 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
878 | { | |
879 | struct nfs_inode *nfsi = NFS_I(inode); | |
880 | int ret = 0; | |
dc59250c | 881 | |
717d44e8 | 882 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
d7cf8dd0 TM |
883 | || nfs_attribute_cache_expired(inode) |
884 | || NFS_STALE(inode)) { | |
717d44e8 TM |
885 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
886 | if (ret < 0) | |
887 | goto out; | |
7d52e862 | 888 | } |
717d44e8 TM |
889 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
890 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 891 | out: |
44b11874 | 892 | return ret; |
7d52e862 TM |
893 | } |
894 | ||
27dc1cd3 | 895 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
896 | { |
897 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 898 | unsigned long ret = 0; |
a895b4a1 | 899 | |
9e6e70f8 TM |
900 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
901 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
902 | && inode->i_version == fattr->pre_change_attr) { |
903 | inode->i_version = fattr->change_attr; | |
70ca8852 TM |
904 | if (S_ISDIR(inode->i_mode)) |
905 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 906 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 907 | } |
a895b4a1 | 908 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
909 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
910 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
911 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
912 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
913 | ret |= NFS_INO_INVALID_ATTR; | |
914 | } | |
9e6e70f8 TM |
915 | |
916 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
917 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
918 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
919 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
920 | if (S_ISDIR(inode->i_mode)) | |
921 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
922 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 923 | } |
9e6e70f8 TM |
924 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
925 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
926 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
927 | && nfsi->npages == 0) { |
928 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
929 | ret |= NFS_INO_INVALID_ATTR; | |
930 | } | |
931 | return ret; | |
a895b4a1 TM |
932 | } |
933 | ||
1da177e4 | 934 | /** |
33801147 | 935 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
936 | * @inode - pointer to inode |
937 | * @fattr - updated attributes | |
938 | * | |
939 | * Verifies the attribute cache. If we have just changed the attributes, | |
940 | * so that fattr carries weak cache consistency data, then it may | |
941 | * also update the ctime/mtime/change_attribute. | |
942 | */ | |
33801147 | 943 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
944 | { |
945 | struct nfs_inode *nfsi = NFS_I(inode); | |
946 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 947 | unsigned long invalid = 0; |
1da177e4 | 948 | |
dc59250c | 949 | |
ca62b9c3 | 950 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
951 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
952 | return -EIO; | |
953 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 954 | return -EIO; |
ca62b9c3 | 955 | |
9e6e70f8 | 956 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 957 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 958 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 959 | |
1da177e4 | 960 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 961 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
2a3f5fd4 | 962 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
ca62b9c3 | 963 | |
9e6e70f8 TM |
964 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
965 | cur_size = i_size_read(inode); | |
966 | new_isize = nfs_size_to_loff_t(fattr->size); | |
967 | if (cur_size != new_isize && nfsi->npages == 0) | |
968 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
969 | } | |
1da177e4 LT |
970 | |
971 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
972 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
973 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
974 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
975 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
976 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 977 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
978 | |
979 | /* Has the link count changed? */ | |
9e6e70f8 | 980 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 981 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 982 | |
9e6e70f8 | 983 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
984 | invalid |= NFS_INO_INVALID_ATIME; |
985 | ||
986 | if (invalid != 0) | |
987 | nfsi->cache_validity |= invalid; | |
1da177e4 | 988 | |
33801147 | 989 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
990 | return 0; |
991 | } | |
992 | ||
a10ad176 | 993 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 994 | { |
9e6e70f8 TM |
995 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
996 | return 0; | |
a10ad176 TM |
997 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
998 | } | |
999 | ||
1000 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1001 | { | |
9e6e70f8 TM |
1002 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1003 | return 0; | |
a10ad176 TM |
1004 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1005 | } | |
870a5be8 | 1006 | |
ae05f269 | 1007 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1008 | |
1009 | static unsigned long nfs_read_attr_generation_counter(void) | |
1010 | { | |
ae05f269 | 1011 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1012 | } |
1013 | ||
1014 | unsigned long nfs_inc_attr_generation_counter(void) | |
1015 | { | |
ae05f269 | 1016 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1017 | } |
1018 | ||
1019 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1020 | { | |
1021 | fattr->valid = 0; | |
1022 | fattr->time_start = jiffies; | |
1023 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1024 | fattr->owner_name = NULL; |
1025 | fattr->group_name = NULL; | |
4704f0e2 TM |
1026 | } |
1027 | ||
2d36bfde TM |
1028 | struct nfs_fattr *nfs_alloc_fattr(void) |
1029 | { | |
1030 | struct nfs_fattr *fattr; | |
1031 | ||
1032 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1033 | if (fattr != NULL) | |
1034 | nfs_fattr_init(fattr); | |
1035 | return fattr; | |
1036 | } | |
1037 | ||
1038 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1039 | { | |
1040 | struct nfs_fh *fh; | |
1041 | ||
1042 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1043 | if (fh != NULL) | |
1044 | fh->size = 0; | |
1045 | return fh; | |
1046 | } | |
1047 | ||
a10ad176 TM |
1048 | /** |
1049 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1050 | * @inode - pointer to inode | |
1051 | * @fattr - attributes | |
1052 | * | |
1053 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1054 | * attributes got scheduled after another call carrying updated ones. | |
1055 | * | |
1056 | * To do so, the function first assumes that a more recent ctime means | |
1057 | * that the attributes in fattr are newer, however it also attempt to | |
1058 | * catch the case where ctime either didn't change, or went backwards | |
1059 | * (if someone reset the clock on the server) by looking at whether | |
1060 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1061 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1062 | * |
1063 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1064 | * more recent than the ones cached in the inode. | |
1065 | * | |
1066 | */ | |
1067 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1068 | { | |
1069 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1070 | ||
4704f0e2 | 1071 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1072 | nfs_ctime_need_update(inode, fattr) || |
1073 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1074 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1075 | } |
1076 | ||
1077 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1078 | { | |
1079 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1080 | return nfs_update_inode(inode, fattr); |
1081 | return nfs_check_inode_attributes(inode, fattr); | |
1082 | } | |
1083 | ||
33801147 TM |
1084 | /** |
1085 | * nfs_refresh_inode - try to update the inode attribute cache | |
1086 | * @inode - pointer to inode | |
1087 | * @fattr - updated attributes | |
1088 | * | |
1089 | * Check that an RPC call that returned attributes has not overlapped with | |
1090 | * other recent updates of the inode metadata, then decide whether it is | |
1091 | * safe to do a full update of the inode attributes, or whether just to | |
1092 | * call nfs_check_inode_attributes. | |
1093 | */ | |
1094 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1095 | { | |
33801147 TM |
1096 | int status; |
1097 | ||
1098 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1099 | return 0; | |
1100 | spin_lock(&inode->i_lock); | |
870a5be8 | 1101 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1102 | spin_unlock(&inode->i_lock); |
ef79c097 | 1103 | |
33801147 TM |
1104 | return status; |
1105 | } | |
1106 | ||
d65f557f TM |
1107 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1108 | { | |
1109 | struct nfs_inode *nfsi = NFS_I(inode); | |
1110 | ||
1111 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1112 | if (S_ISDIR(inode->i_mode)) | |
1113 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1114 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1115 | return 0; | |
1116 | return nfs_refresh_inode_locked(inode, fattr); | |
1117 | } | |
1118 | ||
decf491f TM |
1119 | /** |
1120 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1121 | * @inode - pointer to inode | |
1122 | * @fattr - updated attributes | |
1123 | * | |
1124 | * After an operation that has changed the inode metadata, mark the | |
1125 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1126 | * |
1127 | * NB: if the server didn't return any post op attributes, this | |
1128 | * function will force the retrieval of attributes before the next | |
1129 | * NFS request. Thus it should be used only for operations that | |
1130 | * are expected to change one or more attributes, to avoid | |
1131 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1132 | */ |
1133 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1134 | { | |
d65f557f | 1135 | int status; |
decf491f | 1136 | |
7668fdbe | 1137 | spin_lock(&inode->i_lock); |
d65f557f | 1138 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1139 | spin_unlock(&inode->i_lock); |
870a5be8 | 1140 | return status; |
decf491f TM |
1141 | } |
1142 | ||
70ca8852 TM |
1143 | /** |
1144 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1145 | * @inode - pointer to inode | |
1146 | * @fattr - updated attributes | |
1147 | * | |
1148 | * After an operation that has changed the inode metadata, mark the | |
1149 | * attribute cache as being invalid, then try to update it. Fake up | |
1150 | * weak cache consistency data, if none exist. | |
1151 | * | |
1152 | * This function is mainly designed to be used by the ->write_done() functions. | |
1153 | */ | |
1154 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1155 | { | |
d65f557f TM |
1156 | int status; |
1157 | ||
1158 | spin_lock(&inode->i_lock); | |
1159 | /* Don't do a WCC update if these attributes are already stale */ | |
1160 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1161 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1162 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1163 | | NFS_ATTR_FATTR_PRESIZE | |
1164 | | NFS_ATTR_FATTR_PREMTIME | |
1165 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1166 | goto out_noforce; |
1167 | } | |
9e6e70f8 TM |
1168 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1169 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1170 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1171 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1172 | } |
9e6e70f8 TM |
1173 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1174 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1175 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1176 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1177 | } | |
1178 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1179 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1180 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1181 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1182 | } | |
1183 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1184 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1185 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1186 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1187 | } |
d65f557f TM |
1188 | out_noforce: |
1189 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1190 | spin_unlock(&inode->i_lock); | |
1191 | return status; | |
70ca8852 TM |
1192 | } |
1193 | ||
1da177e4 LT |
1194 | /* |
1195 | * Many nfs protocol calls return the new file attributes after | |
1196 | * an operation. Here we update the inode to reflect the state | |
1197 | * of the server's inode. | |
1198 | * | |
1199 | * This is a bit tricky because we have to make sure all dirty pages | |
1200 | * have been sent off to the server before calling invalidate_inode_pages. | |
1201 | * To make sure no other process adds more write requests while we try | |
1202 | * our best to flush them, we make them sleep during the attribute refresh. | |
1203 | * | |
1204 | * A very similar scenario holds for the dir cache. | |
1205 | */ | |
24aa1fe6 | 1206 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1207 | { |
8b4bdcf8 | 1208 | struct nfs_server *server; |
1da177e4 | 1209 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1210 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1211 | unsigned long invalid = 0; |
3e7d950a | 1212 | unsigned long now = jiffies; |
62ab460c | 1213 | unsigned long save_cache_validity; |
1da177e4 LT |
1214 | |
1215 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
3110ff80 | 1216 | __func__, inode->i_sb->s_id, inode->i_ino, |
1da177e4 LT |
1217 | atomic_read(&inode->i_count), fattr->valid); |
1218 | ||
9e6e70f8 | 1219 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
325cfed9 | 1220 | goto out_fileid; |
1da177e4 LT |
1221 | |
1222 | /* | |
1223 | * Make sure the inode's type hasn't changed. | |
1224 | */ | |
9e6e70f8 | 1225 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1226 | goto out_changed; |
1227 | ||
8b4bdcf8 | 1228 | server = NFS_SERVER(inode); |
a0356862 | 1229 | /* Update the fsid? */ |
9e6e70f8 | 1230 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1231 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1232 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1233 | server->fsid = fattr->fsid; |
1234 | ||
1da177e4 LT |
1235 | /* |
1236 | * Update the read time so we don't revalidate too often. | |
1237 | */ | |
33801147 | 1238 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1239 | |
62ab460c TM |
1240 | save_cache_validity = nfsi->cache_validity; |
1241 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1242 | | NFS_INO_INVALID_ATIME | |
1243 | | NFS_INO_REVAL_FORCED | |
1244 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1245 | |
a895b4a1 | 1246 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1247 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1248 | |
47aabaa7 | 1249 | /* More cache consistency checks */ |
9e6e70f8 | 1250 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1251 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1252 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1253 | inode->i_sb->s_id, inode->i_ino); | |
1254 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1255 | if (S_ISDIR(inode->i_mode)) | |
1256 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1257 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1258 | } |
62ab460c TM |
1259 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1260 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1261 | |
1262 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
47aabaa7 TM |
1263 | /* NFSv2/v3: Check if the mtime agrees */ |
1264 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { | |
1265 | dprintk("NFS: mtime change on server for file %s/%ld\n", | |
1266 | inode->i_sb->s_id, inode->i_ino); | |
1267 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
bfc69a45 TM |
1268 | if (S_ISDIR(inode->i_mode)) |
1269 | nfs_force_lookup_revalidate(inode); | |
9e6e70f8 | 1270 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
47aabaa7 | 1271 | } |
62ab460c TM |
1272 | } else if (server->caps & NFS_CAP_MTIME) |
1273 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1274 | | NFS_INO_INVALID_DATA | |
1275 | | NFS_INO_REVAL_PAGECACHE | |
1276 | | NFS_INO_REVAL_FORCED); | |
1277 | ||
9e6e70f8 | 1278 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
47aabaa7 | 1279 | /* If ctime has changed we should definitely clear access+acl caches */ |
37d9d76d | 1280 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
4704f0e2 | 1281 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
37d9d76d N |
1282 | /* and probably clear data for a directory too as utimes can cause |
1283 | * havoc with our cache. | |
1284 | */ | |
1285 | if (S_ISDIR(inode->i_mode)) { | |
1286 | invalid |= NFS_INO_INVALID_DATA; | |
1287 | nfs_force_lookup_revalidate(inode); | |
1288 | } | |
9e6e70f8 | 1289 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
37d9d76d | 1290 | } |
62ab460c TM |
1291 | } else if (server->caps & NFS_CAP_CTIME) |
1292 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1293 | | NFS_INO_INVALID_ACCESS | |
1294 | | NFS_INO_INVALID_ACL | |
1295 | | NFS_INO_REVAL_FORCED); | |
47aabaa7 | 1296 | |
951a143b | 1297 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1298 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1299 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1300 | cur_isize = i_size_read(inode); | |
1301 | if (new_isize != cur_isize) { | |
1302 | /* Do we perhaps have any outstanding writes, or has | |
1303 | * the file grown beyond our last write? */ | |
0f66b598 PT |
1304 | if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) || |
1305 | new_isize > cur_isize) { | |
9e6e70f8 TM |
1306 | i_size_write(inode, new_isize); |
1307 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1308 | } | |
60c16ea8 HJ |
1309 | dprintk("NFS: isize change on server for file %s/%ld " |
1310 | "(%Ld to %Ld)\n", | |
1311 | inode->i_sb->s_id, | |
1312 | inode->i_ino, | |
1313 | (long long)cur_isize, | |
1314 | (long long)new_isize); | |
1da177e4 | 1315 | } |
62ab460c TM |
1316 | } else |
1317 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1318 | | NFS_INO_REVAL_PAGECACHE | |
1319 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1320 | |
1da177e4 | 1321 | |
9e6e70f8 TM |
1322 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1323 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1324 | else if (server->caps & NFS_CAP_ATIME) |
1325 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1326 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1327 | |
9e6e70f8 TM |
1328 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1329 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1330 | umode_t newmode = inode->i_mode & S_IFMT; |
1331 | newmode |= fattr->mode & S_IALLUGO; | |
1332 | inode->i_mode = newmode; | |
9e6e70f8 | 1333 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1334 | } |
62ab460c TM |
1335 | } else if (server->caps & NFS_CAP_MODE) |
1336 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1337 | | NFS_INO_INVALID_ACCESS | |
1338 | | NFS_INO_INVALID_ACL | |
1339 | | NFS_INO_REVAL_FORCED); | |
1340 | ||
9e6e70f8 TM |
1341 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1342 | if (inode->i_uid != fattr->uid) { | |
1343 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1344 | inode->i_uid = fattr->uid; | |
1345 | } | |
62ab460c TM |
1346 | } else if (server->caps & NFS_CAP_OWNER) |
1347 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1348 | | NFS_INO_INVALID_ACCESS | |
1349 | | NFS_INO_INVALID_ACL | |
1350 | | NFS_INO_REVAL_FORCED); | |
1351 | ||
9e6e70f8 TM |
1352 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1353 | if (inode->i_gid != fattr->gid) { | |
1354 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1355 | inode->i_gid = fattr->gid; | |
1356 | } | |
62ab460c TM |
1357 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1358 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1359 | | NFS_INO_INVALID_ACCESS | |
1360 | | NFS_INO_INVALID_ACL | |
1361 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1362 | |
9e6e70f8 TM |
1363 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1364 | if (inode->i_nlink != fattr->nlink) { | |
1365 | invalid |= NFS_INO_INVALID_ATTR; | |
1366 | if (S_ISDIR(inode->i_mode)) | |
1367 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1368 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1369 | } |
62ab460c TM |
1370 | } else if (server->caps & NFS_CAP_NLINK) |
1371 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1372 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1373 | |
9e6e70f8 | 1374 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1375 | /* |
1376 | * report the blocks in 512byte units | |
1377 | */ | |
1378 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1379 | } |
9e6e70f8 TM |
1380 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1381 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1382 | |
1383 | /* Update attrtimeo value if we're out of the unstable period */ | |
1384 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1385 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1386 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1387 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1388 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1389 | } else { |
64672d55 | 1390 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1391 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1392 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1393 | nfsi->attrtimeo_timestamp = now; | |
1394 | } | |
1da177e4 | 1395 | } |
f2115dc9 | 1396 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1397 | /* Don't invalidate the data if we were to blame */ |
1398 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1399 | || S_ISLNK(inode->i_mode))) | |
1400 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce | 1401 | if (!nfs_have_delegation(inode, FMODE_READ) || |
62ab460c | 1402 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1403 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1404 | |
1405 | return 0; | |
1406 | out_changed: | |
1407 | /* | |
1408 | * Big trouble! The inode has become a different object. | |
1409 | */ | |
1da177e4 | 1410 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
3110ff80 | 1411 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
b37b03b7 | 1412 | out_err: |
1da177e4 LT |
1413 | /* |
1414 | * No need to worry about unhashing the dentry, as the | |
1415 | * lookup validation will know that the inode is bad. | |
1416 | * (But we fall through to invalidate the caches.) | |
1417 | */ | |
1418 | nfs_invalidate_inode(inode); | |
1da177e4 | 1419 | return -ESTALE; |
325cfed9 CL |
1420 | |
1421 | out_fileid: | |
1422 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1423 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
54ceac45 | 1424 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
325cfed9 CL |
1425 | (long long)nfsi->fileid, (long long)fattr->fileid); |
1426 | goto out_err; | |
1da177e4 LT |
1427 | } |
1428 | ||
55a97593 | 1429 | |
1da177e4 LT |
1430 | #ifdef CONFIG_NFS_V4 |
1431 | ||
1da177e4 LT |
1432 | /* |
1433 | * Clean out any remaining NFSv4 state that might be left over due | |
1434 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1435 | * nfs_open(). | |
1436 | */ | |
b57922d9 | 1437 | void nfs4_evict_inode(struct inode *inode) |
1da177e4 | 1438 | { |
b57922d9 AV |
1439 | truncate_inode_pages(&inode->i_data, 0); |
1440 | end_writeback(inode); | |
cbe82603 BH |
1441 | pnfs_return_layout(inode); |
1442 | pnfs_destroy_layout(NFS_I(inode)); | |
1da177e4 | 1443 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1444 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1445 | /* First call standard NFS clear_inode() code */ |
1446 | nfs_clear_inode(inode); | |
1da177e4 | 1447 | } |
1da177e4 LT |
1448 | #endif |
1449 | ||
f7b422b1 | 1450 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1451 | { |
1452 | struct nfs_inode *nfsi; | |
e94b1766 | 1453 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1454 | if (!nfsi) |
1455 | return NULL; | |
55296809 CL |
1456 | nfsi->flags = 0UL; |
1457 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1458 | #ifdef CONFIG_NFS_V3_ACL |
1459 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1460 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1461 | #endif | |
e50a1c2e BF |
1462 | #ifdef CONFIG_NFS_V4 |
1463 | nfsi->nfs4_acl = NULL; | |
1464 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1465 | return &nfsi->vfs_inode; |
1466 | } | |
1467 | ||
fa0d7e3d | 1468 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1469 | { |
fa0d7e3d | 1470 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1471 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1472 | } | |
1473 | ||
fa0d7e3d NP |
1474 | void nfs_destroy_inode(struct inode *inode) |
1475 | { | |
1476 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1477 | } | |
1478 | ||
d75d5414 AM |
1479 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1480 | { | |
1481 | #ifdef CONFIG_NFS_V4 | |
1482 | INIT_LIST_HEAD(&nfsi->open_states); | |
1483 | nfsi->delegation = NULL; | |
1484 | nfsi->delegation_state = 0; | |
1485 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1486 | nfsi->layout = NULL; |
e0c2b380 | 1487 | atomic_set(&nfsi->commits_outstanding, 0); |
d75d5414 AM |
1488 | #endif |
1489 | } | |
f7b422b1 | 1490 | |
51cc5068 | 1491 | static void init_once(void *foo) |
1da177e4 LT |
1492 | { |
1493 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1494 | ||
a35afb83 | 1495 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1496 | INIT_LIST_HEAD(&nfsi->open_files); |
1497 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1498 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
1499 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
a35afb83 | 1500 | nfsi->npages = 0; |
ff778d02 | 1501 | nfsi->ncommit = 0; |
565277f6 TM |
1502 | atomic_set(&nfsi->silly_count, 1); |
1503 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1504 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1505 | nfs4_init_once(nfsi); |
1da177e4 | 1506 | } |
20c2df83 | 1507 | |
f7b422b1 | 1508 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1509 | { |
1510 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1511 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1512 | 0, (SLAB_RECLAIM_ACCOUNT| |
1513 | SLAB_MEM_SPREAD), | |
20c2df83 | 1514 | init_once); |
1da177e4 LT |
1515 | if (nfs_inode_cachep == NULL) |
1516 | return -ENOMEM; | |
1517 | ||
1518 | return 0; | |
1519 | } | |
1520 | ||
266bee88 | 1521 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1522 | { |
1a1d92c1 | 1523 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1524 | } |
1525 | ||
5746006f TM |
1526 | struct workqueue_struct *nfsiod_workqueue; |
1527 | ||
1528 | /* | |
1529 | * start up the nfsiod workqueue | |
1530 | */ | |
1531 | static int nfsiod_start(void) | |
1532 | { | |
1533 | struct workqueue_struct *wq; | |
1534 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1535 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1536 | if (wq == NULL) |
1537 | return -ENOMEM; | |
1538 | nfsiod_workqueue = wq; | |
1539 | return 0; | |
1540 | } | |
1541 | ||
1542 | /* | |
1543 | * Destroy the nfsiod workqueue | |
1544 | */ | |
1545 | static void nfsiod_stop(void) | |
1546 | { | |
1547 | struct workqueue_struct *wq; | |
1548 | ||
1549 | wq = nfsiod_workqueue; | |
1550 | if (wq == NULL) | |
1551 | return; | |
1552 | nfsiod_workqueue = NULL; | |
1553 | destroy_workqueue(wq); | |
1554 | } | |
1555 | ||
1b340d01 | 1556 | int nfs_net_id; |
9e2e74db | 1557 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1558 | |
1559 | static int nfs_net_init(struct net *net) | |
1560 | { | |
1561 | return nfs_dns_resolver_cache_init(net); | |
1562 | } | |
1563 | ||
1564 | static void nfs_net_exit(struct net *net) | |
1565 | { | |
1566 | nfs_dns_resolver_cache_destroy(net); | |
1567 | } | |
1568 | ||
1569 | static struct pernet_operations nfs_net_ops = { | |
1570 | .init = nfs_net_init, | |
1571 | .exit = nfs_net_exit, | |
1572 | .id = &nfs_net_id, | |
1573 | .size = sizeof(struct nfs_net), | |
1574 | }; | |
1575 | ||
1da177e4 LT |
1576 | /* |
1577 | * Initialize NFS | |
1578 | */ | |
1579 | static int __init init_nfs_fs(void) | |
1580 | { | |
1581 | int err; | |
1582 | ||
955a857e BS |
1583 | err = nfs_idmap_init(); |
1584 | if (err < 0) | |
1b340d01 | 1585 | goto out10; |
955a857e | 1586 | |
e571cbf1 | 1587 | err = nfs_dns_resolver_init(); |
1b340d01 SK |
1588 | if (err < 0) |
1589 | goto out9; | |
1590 | ||
1591 | err = register_pernet_subsys(&nfs_net_ops); | |
e571cbf1 TM |
1592 | if (err < 0) |
1593 | goto out8; | |
1594 | ||
8ec442ae DH |
1595 | err = nfs_fscache_register(); |
1596 | if (err < 0) | |
1597 | goto out7; | |
1598 | ||
5746006f TM |
1599 | err = nfsiod_start(); |
1600 | if (err) | |
1601 | goto out6; | |
1602 | ||
6aaca566 DH |
1603 | err = nfs_fs_proc_init(); |
1604 | if (err) | |
1605 | goto out5; | |
1606 | ||
1da177e4 LT |
1607 | err = nfs_init_nfspagecache(); |
1608 | if (err) | |
1609 | goto out4; | |
1610 | ||
1611 | err = nfs_init_inodecache(); | |
1612 | if (err) | |
1613 | goto out3; | |
1614 | ||
1615 | err = nfs_init_readpagecache(); | |
1616 | if (err) | |
1617 | goto out2; | |
1618 | ||
1619 | err = nfs_init_writepagecache(); | |
1620 | if (err) | |
1621 | goto out1; | |
1622 | ||
1da177e4 LT |
1623 | err = nfs_init_directcache(); |
1624 | if (err) | |
1625 | goto out0; | |
1da177e4 LT |
1626 | |
1627 | #ifdef CONFIG_PROC_FS | |
1628 | rpc_proc_register(&nfs_rpcstat); | |
1629 | #endif | |
f7b422b1 | 1630 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1631 | goto out; |
1632 | return 0; | |
1633 | out: | |
1634 | #ifdef CONFIG_PROC_FS | |
1635 | rpc_proc_unregister("nfs"); | |
1636 | #endif | |
1da177e4 | 1637 | nfs_destroy_directcache(); |
6b59a754 | 1638 | out0: |
6b59a754 | 1639 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1640 | out1: |
1641 | nfs_destroy_readpagecache(); | |
1642 | out2: | |
1643 | nfs_destroy_inodecache(); | |
1644 | out3: | |
1645 | nfs_destroy_nfspagecache(); | |
1646 | out4: | |
6aaca566 DH |
1647 | nfs_fs_proc_exit(); |
1648 | out5: | |
5746006f TM |
1649 | nfsiod_stop(); |
1650 | out6: | |
8ec442ae DH |
1651 | nfs_fscache_unregister(); |
1652 | out7: | |
1b340d01 | 1653 | unregister_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1654 | out8: |
1b340d01 | 1655 | nfs_dns_resolver_destroy(); |
955a857e | 1656 | out9: |
1b340d01 SK |
1657 | nfs_idmap_quit(); |
1658 | out10: | |
1da177e4 LT |
1659 | return err; |
1660 | } | |
1661 | ||
1662 | static void __exit exit_nfs_fs(void) | |
1663 | { | |
1da177e4 | 1664 | nfs_destroy_directcache(); |
1da177e4 LT |
1665 | nfs_destroy_writepagecache(); |
1666 | nfs_destroy_readpagecache(); | |
1667 | nfs_destroy_inodecache(); | |
1668 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1669 | nfs_fscache_unregister(); |
1b340d01 | 1670 | unregister_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1671 | nfs_dns_resolver_destroy(); |
955a857e | 1672 | nfs_idmap_quit(); |
1da177e4 LT |
1673 | #ifdef CONFIG_PROC_FS |
1674 | rpc_proc_unregister("nfs"); | |
1675 | #endif | |
f4eecd5d | 1676 | nfs_cleanup_cb_ident_idr(); |
f7b422b1 | 1677 | unregister_nfs_fs(); |
6aaca566 | 1678 | nfs_fs_proc_exit(); |
5746006f | 1679 | nfsiod_stop(); |
1da177e4 LT |
1680 | } |
1681 | ||
1682 | /* Not quite true; I just maintain it */ | |
1683 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1684 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1685 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1686 | |
1687 | module_init(init_nfs_fs) | |
1688 | module_exit(exit_nfs_fs) |