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> | |
1da177e4 | 35 | #include <linux/vfs.h> |
9cdb3883 MN |
36 | #include <linux/inet.h> |
37 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
3fa0b4e2 | 39 | #include <linux/compat.h> |
d310310c | 40 | #include <linux/freezer.h> |
d8e0539e | 41 | #include <linux/crc32.h> |
1da177e4 | 42 | |
1da177e4 LT |
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" |
ab7017a3 | 53 | #include "nfs.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 | ||
19d87ca3 | 109 | 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); | |
dbd5768f | 124 | clear_inode(inode); |
b57922d9 AV |
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 | } | |
ddda8e0a | 196 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 197 | |
1da177e4 | 198 | /* |
b37b03b7 TM |
199 | * Invalidate, but do not unhash, the inode. |
200 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 201 | */ |
b37b03b7 | 202 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 203 | { |
3a10c30a | 204 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 205 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
206 | } |
207 | ||
208 | struct nfs_find_desc { | |
209 | struct nfs_fh *fh; | |
210 | struct nfs_fattr *fattr; | |
211 | }; | |
212 | ||
213 | /* | |
214 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
215 | * this, and re-exported directories (also seen in NFSv2) | |
216 | * we are forced to allow 2 different inodes to have the same | |
217 | * i_ino. | |
218 | */ | |
219 | static int | |
220 | nfs_find_actor(struct inode *inode, void *opaque) | |
221 | { | |
222 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
223 | struct nfs_fh *fh = desc->fh; | |
224 | struct nfs_fattr *fattr = desc->fattr; | |
225 | ||
226 | if (NFS_FILEID(inode) != fattr->fileid) | |
227 | return 0; | |
228 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
229 | return 0; | |
230 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
231 | return 0; | |
232 | return 1; | |
233 | } | |
234 | ||
235 | static int | |
236 | nfs_init_locked(struct inode *inode, void *opaque) | |
237 | { | |
238 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
239 | struct nfs_fattr *fattr = desc->fattr; | |
240 | ||
99fadcd7 | 241 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
242 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
243 | return 0; | |
244 | } | |
245 | ||
1da177e4 LT |
246 | /* |
247 | * This is our front-end to iget that looks up inodes by file handle | |
248 | * instead of inode number. | |
249 | */ | |
250 | struct inode * | |
251 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
252 | { | |
253 | struct nfs_find_desc desc = { | |
254 | .fh = fh, | |
255 | .fattr = fattr | |
256 | }; | |
03f28e3a | 257 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
258 | unsigned long hash; |
259 | ||
7ebb9315 BS |
260 | nfs_attr_check_mountpoint(sb, fattr); |
261 | ||
533eb461 AA |
262 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
263 | !nfs_attr_use_mounted_on_fileid(fattr)) | |
1da177e4 | 264 | goto out_no_inode; |
9e6e70f8 | 265 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 266 | goto out_no_inode; |
1da177e4 LT |
267 | |
268 | hash = nfs_fattr_to_ino_t(fattr); | |
269 | ||
03f28e3a TM |
270 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
271 | if (inode == NULL) { | |
272 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 273 | goto out_no_inode; |
03f28e3a | 274 | } |
1da177e4 LT |
275 | |
276 | if (inode->i_state & I_NEW) { | |
277 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 278 | unsigned long now = jiffies; |
1da177e4 LT |
279 | |
280 | /* We set i_ino for the few things that still rely on it, | |
281 | * such as stat(2) */ | |
282 | inode->i_ino = hash; | |
283 | ||
284 | /* We can't support update_atime(), since the server will reset it */ | |
285 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
286 | inode->i_mode = fattr->mode; | |
62ab460c TM |
287 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
288 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
4124bbc5 | 289 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
290 | /* Why so? Because we want revalidate for devices/FIFOs, and |
291 | * that's precisely what we have in nfs_file_inode_operations. | |
292 | */ | |
8fa5c000 | 293 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 294 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 295 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 LT |
296 | inode->i_data.a_ops = &nfs_file_aops; |
297 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
298 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 299 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 300 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 301 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 302 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
303 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
304 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
305 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
306 | inode->i_op = &nfs_referral_inode_operations; | |
307 | else | |
308 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 309 | inode->i_fop = NULL; |
36d43a43 | 310 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 311 | } |
1da177e4 LT |
312 | } else if (S_ISLNK(inode->i_mode)) |
313 | inode->i_op = &nfs_symlink_inode_operations; | |
314 | else | |
315 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
316 | ||
9e6e70f8 TM |
317 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
318 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
319 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 320 | inode->i_version = 0; |
9e6e70f8 | 321 | inode->i_size = 0; |
6d6b77f1 | 322 | clear_nlink(inode); |
9e6e70f8 TM |
323 | inode->i_uid = -2; |
324 | inode->i_gid = -2; | |
325 | inode->i_blocks = 0; | |
326 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
327 | nfsi->write_io = 0; |
328 | nfsi->read_io = 0; | |
9e6e70f8 | 329 | |
33801147 | 330 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 331 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
332 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
333 | inode->i_atime = fattr->atime; | |
62ab460c TM |
334 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
335 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
336 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
337 | inode->i_mtime = fattr->mtime; | |
62ab460c | 338 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
4124bbc5 | 339 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
340 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
341 | inode->i_ctime = fattr->ctime; | |
62ab460c | 342 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
4124bbc5 | 343 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 | 344 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 345 | inode->i_version = fattr->change_attr; |
62ab460c | 346 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
4124bbc5 | 347 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
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 | |
62ab460c | 352 | | NFS_INO_REVAL_PAGECACHE; |
9e6e70f8 | 353 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 354 | set_nlink(inode, fattr->nlink); |
62ab460c TM |
355 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
356 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
357 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
358 | inode->i_uid = fattr->uid; | |
62ab460c | 359 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
4124bbc5 | 360 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
361 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
362 | inode->i_gid = fattr->gid; | |
62ab460c | 363 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
4124bbc5 | 364 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
9e6e70f8 TM |
365 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
366 | inode->i_blocks = fattr->du.nfs2.blocks; | |
367 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
368 | /* |
369 | * report the blocks in 512byte units | |
370 | */ | |
371 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
372 | } |
373 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 374 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 375 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 376 | |
ef79c097 DH |
377 | nfs_fscache_init_inode_cookie(inode); |
378 | ||
1da177e4 LT |
379 | unlock_new_inode(inode); |
380 | } else | |
381 | nfs_refresh_inode(inode, fattr); | |
4f1abd22 | 382 | dprintk("NFS: nfs_fhget(%s/%Ld fh_crc=0x%08x ct=%d)\n", |
1da177e4 LT |
383 | inode->i_sb->s_id, |
384 | (long long)NFS_FILEID(inode), | |
4f1abd22 | 385 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
386 | atomic_read(&inode->i_count)); |
387 | ||
388 | out: | |
389 | return inode; | |
390 | ||
391 | out_no_inode: | |
03f28e3a | 392 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
393 | goto out; |
394 | } | |
395 | ||
536e43d1 | 396 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE|ATTR_OPEN) |
1da177e4 LT |
397 | |
398 | int | |
399 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
400 | { | |
401 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
402 | struct nfs_fattr *fattr; |
403 | int error = -ENOMEM; | |
1da177e4 | 404 | |
91d5b470 CL |
405 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
406 | ||
188b95dd JL |
407 | /* skip mode change if it's just for clearing setuid/setgid */ |
408 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
409 | attr->ia_valid &= ~ATTR_MODE; | |
410 | ||
1da177e4 LT |
411 | if (attr->ia_valid & ATTR_SIZE) { |
412 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
413 | attr->ia_valid &= ~ATTR_SIZE; | |
414 | } | |
415 | ||
416 | /* Optimization: if the end result is no change, don't RPC */ | |
417 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 418 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
419 | return 0; |
420 | ||
755c1e20 | 421 | /* Write all dirty data */ |
1d59d61f TM |
422 | if (S_ISREG(inode->i_mode)) { |
423 | nfs_inode_dio_wait(inode); | |
e1552e19 | 424 | nfs_wb_all(inode); |
1d59d61f | 425 | } |
987f8dfc TM |
426 | |
427 | fattr = nfs_alloc_fattr(); | |
428 | if (fattr == NULL) | |
429 | goto out; | |
642ac549 TM |
430 | /* |
431 | * Return any delegations if we're going to change ACLs | |
432 | */ | |
433 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 434 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 435 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 436 | if (error == 0) |
987f8dfc TM |
437 | nfs_refresh_inode(inode, fattr); |
438 | nfs_free_fattr(fattr); | |
439 | out: | |
65e4308d TM |
440 | return error; |
441 | } | |
ddda8e0a | 442 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 443 | |
a3d01454 TM |
444 | /** |
445 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
446 | * @inode: inode of the file used | |
447 | * @offset: file offset to start truncating | |
448 | * | |
449 | * This is a copy of the common vmtruncate, but with the locking | |
450 | * corrected to take into account the fact that NFS requires | |
451 | * inode->i_size to be updated under the inode->i_lock. | |
452 | */ | |
453 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
454 | { | |
c08d3b0e | 455 | loff_t oldsize; |
456 | int err; | |
a3d01454 | 457 | |
c08d3b0e | 458 | err = inode_newsize_ok(inode, offset); |
459 | if (err) | |
460 | goto out; | |
a3d01454 | 461 | |
c08d3b0e | 462 | spin_lock(&inode->i_lock); |
463 | oldsize = inode->i_size; | |
464 | i_size_write(inode, offset); | |
465 | spin_unlock(&inode->i_lock); | |
466 | ||
467 | truncate_pagecache(inode, oldsize, offset); | |
468 | out: | |
469 | return err; | |
a3d01454 TM |
470 | } |
471 | ||
65e4308d TM |
472 | /** |
473 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
474 | * @inode: pointer to struct inode | |
475 | * @attr: pointer to struct iattr | |
476 | * | |
477 | * Note: we do this in the *proc.c in order to ensure that | |
478 | * it works for things like exclusive creates too. | |
479 | */ | |
480 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
481 | { | |
482 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 483 | spin_lock(&inode->i_lock); |
1da177e4 | 484 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
485 | int mode = attr->ia_mode & S_IALLUGO; |
486 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
487 | inode->i_mode = mode; |
488 | } | |
489 | if ((attr->ia_valid & ATTR_UID) != 0) | |
490 | inode->i_uid = attr->ia_uid; | |
491 | if ((attr->ia_valid & ATTR_GID) != 0) | |
492 | inode->i_gid = attr->ia_gid; | |
55296809 | 493 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 494 | spin_unlock(&inode->i_lock); |
65e4308d TM |
495 | } |
496 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 497 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 498 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 499 | } |
1da177e4 | 500 | } |
ddda8e0a | 501 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 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)) { |
1d59d61f | 511 | nfs_inode_dio_wait(inode); |
acdc53b2 TM |
512 | err = filemap_write_and_wait(inode->i_mapping); |
513 | if (err) | |
514 | goto out; | |
28c494c5 | 515 | } |
fc33a7bb CH |
516 | |
517 | /* | |
518 | * We may force a getattr if the user cares about atime. | |
519 | * | |
520 | * Note that we only have to check the vfsmount flags here: | |
521 | * - NFS always sets S_NOATIME by so checking it would give a | |
522 | * bogus result | |
523 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
524 | * no point in checking those. | |
525 | */ | |
526 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
527 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 528 | need_atime = 0; |
fc33a7bb | 529 | |
1da177e4 LT |
530 | if (need_atime) |
531 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
532 | else | |
533 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 534 | if (!err) { |
1da177e4 | 535 | generic_fillattr(inode, stat); |
f43bf0be | 536 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 537 | } |
acdc53b2 | 538 | out: |
1da177e4 LT |
539 | return err; |
540 | } | |
ddda8e0a | 541 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 542 | |
f11ac8db TM |
543 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
544 | { | |
545 | atomic_set(&l_ctx->count, 1); | |
546 | l_ctx->lockowner = current->files; | |
547 | l_ctx->pid = current->tgid; | |
548 | INIT_LIST_HEAD(&l_ctx->list); | |
549 | } | |
550 | ||
551 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
552 | { | |
553 | struct nfs_lock_context *pos; | |
554 | ||
555 | list_for_each_entry(pos, &ctx->lock_context.list, list) { | |
556 | if (pos->lockowner != current->files) | |
557 | continue; | |
558 | if (pos->pid != current->tgid) | |
559 | continue; | |
560 | atomic_inc(&pos->count); | |
561 | return pos; | |
562 | } | |
563 | return NULL; | |
564 | } | |
565 | ||
566 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
567 | { | |
568 | struct nfs_lock_context *res, *new = NULL; | |
3d4ff43d | 569 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
570 | |
571 | spin_lock(&inode->i_lock); | |
572 | res = __nfs_find_lock_context(ctx); | |
573 | if (res == NULL) { | |
574 | spin_unlock(&inode->i_lock); | |
575 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
576 | if (new == NULL) | |
577 | return NULL; | |
578 | nfs_init_lock_context(new); | |
579 | spin_lock(&inode->i_lock); | |
580 | res = __nfs_find_lock_context(ctx); | |
581 | if (res == NULL) { | |
582 | list_add_tail(&new->list, &ctx->lock_context.list); | |
583 | new->open_context = ctx; | |
584 | res = new; | |
585 | new = NULL; | |
586 | } | |
587 | } | |
588 | spin_unlock(&inode->i_lock); | |
589 | kfree(new); | |
590 | return res; | |
591 | } | |
592 | ||
593 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
594 | { | |
595 | struct nfs_open_context *ctx = l_ctx->open_context; | |
3d4ff43d | 596 | struct inode *inode = ctx->dentry->d_inode; |
f11ac8db TM |
597 | |
598 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
599 | return; | |
600 | list_del(&l_ctx->list); | |
601 | spin_unlock(&inode->i_lock); | |
602 | kfree(l_ctx); | |
603 | } | |
604 | ||
7fe5c398 TM |
605 | /** |
606 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
607 | * @ctx: pointer to context | |
608 | * @is_sync: is this a synchronous close | |
609 | * | |
610 | * always ensure that the attributes are up to date if we're mounted | |
611 | * with close-to-open semantics | |
612 | */ | |
613 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
614 | { | |
615 | struct inode *inode; | |
616 | struct nfs_server *server; | |
617 | ||
618 | if (!(ctx->mode & FMODE_WRITE)) | |
619 | return; | |
620 | if (!is_sync) | |
621 | return; | |
3d4ff43d | 622 | inode = ctx->dentry->d_inode; |
7fe5c398 TM |
623 | if (!list_empty(&NFS_I(inode)->open_files)) |
624 | return; | |
625 | server = NFS_SERVER(inode); | |
626 | if (server->flags & NFS_MOUNT_NOCTO) | |
627 | return; | |
628 | nfs_revalidate_inode(server, inode); | |
629 | } | |
ddda8e0a | 630 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 631 | |
5ede7b1c | 632 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
633 | { |
634 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
635 | struct rpc_cred *cred = rpc_lookup_cred(); |
636 | if (IS_ERR(cred)) | |
637 | return ERR_CAST(cred); | |
1da177e4 | 638 | |
f52720ca | 639 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
640 | if (!ctx) { |
641 | put_rpccred(cred); | |
642 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 643 | } |
5ede7b1c AV |
644 | nfs_sb_active(dentry->d_sb); |
645 | ctx->dentry = dget(dentry); | |
646 | ctx->cred = cred; | |
647 | ctx->state = NULL; | |
648 | ctx->mode = f_mode; | |
649 | ctx->flags = 0; | |
650 | ctx->error = 0; | |
651 | nfs_init_lock_context(&ctx->lock_context); | |
652 | ctx->lock_context.open_context = ctx; | |
653 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 654 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
655 | return ctx; |
656 | } | |
657 | ||
658 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
659 | { | |
660 | if (ctx != NULL) | |
f11ac8db | 661 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
662 | return ctx; |
663 | } | |
664 | ||
7fe5c398 | 665 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 666 | { |
3d4ff43d AV |
667 | struct inode *inode = ctx->dentry->d_inode; |
668 | struct super_block *sb = ctx->dentry->d_sb; | |
3bec63db | 669 | |
5c78f58e | 670 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
671 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
672 | return; | |
673 | list_del(&ctx->list); | |
674 | spin_unlock(&inode->i_lock); | |
ef84303e | 675 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 676 | return; |
5c78f58e TM |
677 | if (inode != NULL) |
678 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
679 | if (ctx->cred != NULL) |
680 | put_rpccred(ctx->cred); | |
3d4ff43d AV |
681 | dput(ctx->dentry); |
682 | nfs_sb_deactive(sb); | |
82be417a | 683 | kfree(ctx->mdsthreshold); |
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 | ||
b4b1eadf TM |
872 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
873 | { | |
874 | if (nfs_have_delegated_attributes(inode)) | |
875 | return false; | |
876 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
877 | || nfs_attribute_timeout(inode) | |
878 | || NFS_STALE(inode); | |
879 | } | |
880 | ||
717d44e8 TM |
881 | /** |
882 | * nfs_revalidate_mapping - Revalidate the pagecache | |
883 | * @inode - pointer to host inode | |
884 | * @mapping - pointer to mapping | |
717d44e8 TM |
885 | */ |
886 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
887 | { | |
888 | struct nfs_inode *nfsi = NFS_I(inode); | |
889 | int ret = 0; | |
dc59250c | 890 | |
b4b1eadf | 891 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
892 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
893 | if (ret < 0) | |
894 | goto out; | |
7d52e862 | 895 | } |
717d44e8 TM |
896 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
897 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 898 | out: |
44b11874 | 899 | return ret; |
7d52e862 TM |
900 | } |
901 | ||
27dc1cd3 | 902 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
903 | { |
904 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 905 | unsigned long ret = 0; |
a895b4a1 | 906 | |
9e6e70f8 TM |
907 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
908 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
909 | && inode->i_version == fattr->pre_change_attr) { |
910 | inode->i_version = fattr->change_attr; | |
70ca8852 TM |
911 | if (S_ISDIR(inode->i_mode)) |
912 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
27dc1cd3 | 913 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 914 | } |
a895b4a1 | 915 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
916 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
917 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
918 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
919 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
920 | ret |= NFS_INO_INVALID_ATTR; | |
921 | } | |
9e6e70f8 TM |
922 | |
923 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
924 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
925 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
926 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
927 | if (S_ISDIR(inode->i_mode)) | |
928 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
929 | ret |= NFS_INO_INVALID_ATTR; | |
a895b4a1 | 930 | } |
9e6e70f8 TM |
931 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
932 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
933 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
27dc1cd3 TM |
934 | && nfsi->npages == 0) { |
935 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
936 | ret |= NFS_INO_INVALID_ATTR; | |
937 | } | |
938 | return ret; | |
a895b4a1 TM |
939 | } |
940 | ||
1da177e4 | 941 | /** |
33801147 | 942 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
943 | * @inode - pointer to inode |
944 | * @fattr - updated attributes | |
945 | * | |
946 | * Verifies the attribute cache. If we have just changed the attributes, | |
947 | * so that fattr carries weak cache consistency data, then it may | |
948 | * also update the ctime/mtime/change_attribute. | |
949 | */ | |
33801147 | 950 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
951 | { |
952 | struct nfs_inode *nfsi = NFS_I(inode); | |
953 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 954 | unsigned long invalid = 0; |
1da177e4 | 955 | |
dc59250c | 956 | |
01da47bd TM |
957 | if (nfs_have_delegated_attributes(inode)) |
958 | return 0; | |
ca62b9c3 | 959 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
960 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
961 | return -EIO; | |
962 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 963 | return -EIO; |
ca62b9c3 | 964 | |
9e6e70f8 | 965 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 966 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 967 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 968 | |
1da177e4 | 969 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 970 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 971 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 972 | |
9e6e70f8 TM |
973 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
974 | cur_size = i_size_read(inode); | |
975 | new_isize = nfs_size_to_loff_t(fattr->size); | |
976 | if (cur_size != new_isize && nfsi->npages == 0) | |
977 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
978 | } | |
1da177e4 LT |
979 | |
980 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
981 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
982 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
983 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
984 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
985 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 986 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
987 | |
988 | /* Has the link count changed? */ | |
9e6e70f8 | 989 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 990 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 991 | |
9e6e70f8 | 992 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
993 | invalid |= NFS_INO_INVALID_ATIME; |
994 | ||
995 | if (invalid != 0) | |
996 | nfsi->cache_validity |= invalid; | |
1da177e4 | 997 | |
33801147 | 998 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
999 | return 0; |
1000 | } | |
1001 | ||
a10ad176 | 1002 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 1003 | { |
9e6e70f8 TM |
1004 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
1005 | return 0; | |
a10ad176 TM |
1006 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
1007 | } | |
1008 | ||
1009 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1010 | { | |
9e6e70f8 TM |
1011 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
1012 | return 0; | |
a10ad176 TM |
1013 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
1014 | } | |
870a5be8 | 1015 | |
ae05f269 | 1016 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1017 | |
1018 | static unsigned long nfs_read_attr_generation_counter(void) | |
1019 | { | |
ae05f269 | 1020 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1021 | } |
1022 | ||
1023 | unsigned long nfs_inc_attr_generation_counter(void) | |
1024 | { | |
ae05f269 | 1025 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1026 | } |
1027 | ||
1028 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1029 | { | |
1030 | fattr->valid = 0; | |
1031 | fattr->time_start = jiffies; | |
1032 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1033 | fattr->owner_name = NULL; |
1034 | fattr->group_name = NULL; | |
4704f0e2 | 1035 | } |
ddda8e0a | 1036 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1037 | |
2d36bfde TM |
1038 | struct nfs_fattr *nfs_alloc_fattr(void) |
1039 | { | |
1040 | struct nfs_fattr *fattr; | |
1041 | ||
1042 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1043 | if (fattr != NULL) | |
1044 | nfs_fattr_init(fattr); | |
1045 | return fattr; | |
1046 | } | |
ddda8e0a | 1047 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1048 | |
1049 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1050 | { | |
1051 | struct nfs_fh *fh; | |
1052 | ||
1053 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1054 | if (fh != NULL) | |
1055 | fh->size = 0; | |
1056 | return fh; | |
1057 | } | |
ddda8e0a | 1058 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1059 | |
e27d359e | 1060 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1061 | /* |
1062 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1063 | * in the same way that wireshark does | |
1064 | * | |
1065 | * @fh: file handle | |
1066 | * | |
1067 | * For debugging only. | |
1068 | */ | |
1069 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1070 | { | |
1071 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1072 | * not on the result */ | |
1073 | return ~crc32(0xFFFFFFFF, &fh->data[0], fh->size); | |
1074 | } | |
1075 | ||
1076 | /* | |
20d27e92 CL |
1077 | * _nfs_display_fhandle - display an NFS file handle on the console |
1078 | * | |
1079 | * @fh: file handle to display | |
1080 | * @caption: display caption | |
1081 | * | |
1082 | * For debugging only. | |
1083 | */ | |
20d27e92 CL |
1084 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1085 | { | |
1086 | unsigned short i; | |
1087 | ||
fa68a1ba | 1088 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1089 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1090 | return; | |
1091 | } | |
1092 | ||
d8e0539e WAA |
1093 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1094 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1095 | for (i = 0; i < fh->size; i += 16) { |
1096 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1097 | ||
1098 | switch ((fh->size - i - 1) >> 2) { | |
1099 | case 0: | |
1100 | printk(KERN_DEFAULT " %08x\n", | |
1101 | be32_to_cpup(pos)); | |
1102 | break; | |
1103 | case 1: | |
1104 | printk(KERN_DEFAULT " %08x %08x\n", | |
1105 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1106 | break; | |
1107 | case 2: | |
1108 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1109 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1110 | be32_to_cpup(pos + 2)); | |
1111 | break; | |
1112 | default: | |
1113 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1114 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1115 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1116 | } | |
1117 | } | |
1118 | } | |
1119 | #endif | |
1120 | ||
a10ad176 TM |
1121 | /** |
1122 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1123 | * @inode - pointer to inode | |
1124 | * @fattr - attributes | |
1125 | * | |
1126 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1127 | * attributes got scheduled after another call carrying updated ones. | |
1128 | * | |
1129 | * To do so, the function first assumes that a more recent ctime means | |
1130 | * that the attributes in fattr are newer, however it also attempt to | |
1131 | * catch the case where ctime either didn't change, or went backwards | |
1132 | * (if someone reset the clock on the server) by looking at whether | |
1133 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1134 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1135 | * |
1136 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1137 | * more recent than the ones cached in the inode. | |
1138 | * | |
1139 | */ | |
1140 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1141 | { | |
1142 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1143 | ||
4704f0e2 | 1144 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1145 | nfs_ctime_need_update(inode, fattr) || |
1146 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1147 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1148 | } |
1149 | ||
1150 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1151 | { | |
1152 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1153 | return nfs_update_inode(inode, fattr); |
1154 | return nfs_check_inode_attributes(inode, fattr); | |
1155 | } | |
1156 | ||
33801147 TM |
1157 | /** |
1158 | * nfs_refresh_inode - try to update the inode attribute cache | |
1159 | * @inode - pointer to inode | |
1160 | * @fattr - updated attributes | |
1161 | * | |
1162 | * Check that an RPC call that returned attributes has not overlapped with | |
1163 | * other recent updates of the inode metadata, then decide whether it is | |
1164 | * safe to do a full update of the inode attributes, or whether just to | |
1165 | * call nfs_check_inode_attributes. | |
1166 | */ | |
1167 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1168 | { | |
33801147 TM |
1169 | int status; |
1170 | ||
1171 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1172 | return 0; | |
1173 | spin_lock(&inode->i_lock); | |
870a5be8 | 1174 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1175 | spin_unlock(&inode->i_lock); |
ef79c097 | 1176 | |
33801147 TM |
1177 | return status; |
1178 | } | |
ddda8e0a | 1179 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1180 | |
d65f557f TM |
1181 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1182 | { | |
1183 | struct nfs_inode *nfsi = NFS_I(inode); | |
1184 | ||
1185 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1186 | if (S_ISDIR(inode->i_mode)) | |
1187 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1188 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1189 | return 0; | |
1190 | return nfs_refresh_inode_locked(inode, fattr); | |
1191 | } | |
1192 | ||
decf491f TM |
1193 | /** |
1194 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1195 | * @inode - pointer to inode | |
1196 | * @fattr - updated attributes | |
1197 | * | |
1198 | * After an operation that has changed the inode metadata, mark the | |
1199 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1200 | * |
1201 | * NB: if the server didn't return any post op attributes, this | |
1202 | * function will force the retrieval of attributes before the next | |
1203 | * NFS request. Thus it should be used only for operations that | |
1204 | * are expected to change one or more attributes, to avoid | |
1205 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1206 | */ |
1207 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1208 | { | |
d65f557f | 1209 | int status; |
decf491f | 1210 | |
7668fdbe | 1211 | spin_lock(&inode->i_lock); |
d65f557f | 1212 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1213 | spin_unlock(&inode->i_lock); |
870a5be8 | 1214 | return status; |
decf491f TM |
1215 | } |
1216 | ||
70ca8852 TM |
1217 | /** |
1218 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1219 | * @inode - pointer to inode | |
1220 | * @fattr - updated attributes | |
1221 | * | |
1222 | * After an operation that has changed the inode metadata, mark the | |
1223 | * attribute cache as being invalid, then try to update it. Fake up | |
1224 | * weak cache consistency data, if none exist. | |
1225 | * | |
1226 | * This function is mainly designed to be used by the ->write_done() functions. | |
1227 | */ | |
1228 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1229 | { | |
d65f557f TM |
1230 | int status; |
1231 | ||
1232 | spin_lock(&inode->i_lock); | |
1233 | /* Don't do a WCC update if these attributes are already stale */ | |
1234 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1235 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1236 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1237 | | NFS_ATTR_FATTR_PRESIZE | |
1238 | | NFS_ATTR_FATTR_PREMTIME | |
1239 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1240 | goto out_noforce; |
1241 | } | |
9e6e70f8 TM |
1242 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1243 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1244 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1245 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1246 | } |
9e6e70f8 TM |
1247 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1248 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1249 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1250 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1251 | } | |
1252 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1253 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1254 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1255 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1256 | } | |
1257 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1258 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1259 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1260 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1261 | } |
d65f557f TM |
1262 | out_noforce: |
1263 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1264 | spin_unlock(&inode->i_lock); | |
1265 | return status; | |
70ca8852 | 1266 | } |
ddda8e0a | 1267 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1268 | |
1da177e4 LT |
1269 | /* |
1270 | * Many nfs protocol calls return the new file attributes after | |
1271 | * an operation. Here we update the inode to reflect the state | |
1272 | * of the server's inode. | |
1273 | * | |
1274 | * This is a bit tricky because we have to make sure all dirty pages | |
1275 | * have been sent off to the server before calling invalidate_inode_pages. | |
1276 | * To make sure no other process adds more write requests while we try | |
1277 | * our best to flush them, we make them sleep during the attribute refresh. | |
1278 | * | |
1279 | * A very similar scenario holds for the dir cache. | |
1280 | */ | |
24aa1fe6 | 1281 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1282 | { |
8b4bdcf8 | 1283 | struct nfs_server *server; |
1da177e4 | 1284 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1285 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1286 | unsigned long invalid = 0; |
3e7d950a | 1287 | unsigned long now = jiffies; |
62ab460c | 1288 | unsigned long save_cache_validity; |
1da177e4 | 1289 | |
4f1abd22 | 1290 | dfprintk(VFS, "NFS: %s(%s/%ld fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1291 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1292 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1293 | atomic_read(&inode->i_count), fattr->valid); |
1294 | ||
e73e6c9e MT |
1295 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
1296 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1297 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1298 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1299 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1300 | (long long)fattr->fileid); | |
1301 | goto out_err; | |
1302 | } | |
1da177e4 LT |
1303 | |
1304 | /* | |
1305 | * Make sure the inode's type hasn't changed. | |
1306 | */ | |
e73e6c9e MT |
1307 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1308 | /* | |
1309 | * Big trouble! The inode has become a different object. | |
1310 | */ | |
1311 | printk(KERN_DEBUG "NFS: %s: inode %ld mode changed, %07o to %07o\n", | |
1312 | __func__, inode->i_ino, inode->i_mode, fattr->mode); | |
1313 | goto out_err; | |
1314 | } | |
1da177e4 | 1315 | |
8b4bdcf8 | 1316 | server = NFS_SERVER(inode); |
a0356862 | 1317 | /* Update the fsid? */ |
9e6e70f8 | 1318 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1319 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1320 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1321 | server->fsid = fattr->fsid; |
1322 | ||
1da177e4 LT |
1323 | /* |
1324 | * Update the read time so we don't revalidate too often. | |
1325 | */ | |
33801147 | 1326 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1327 | |
62ab460c TM |
1328 | save_cache_validity = nfsi->cache_validity; |
1329 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1330 | | NFS_INO_INVALID_ATIME | |
1331 | | NFS_INO_REVAL_FORCED | |
1332 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1333 | |
a895b4a1 | 1334 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1335 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1336 | |
47aabaa7 | 1337 | /* More cache consistency checks */ |
9e6e70f8 | 1338 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1339 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1340 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1341 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1342 | invalid |= NFS_INO_INVALID_ATTR |
1343 | | NFS_INO_INVALID_DATA | |
1344 | | NFS_INO_INVALID_ACCESS | |
1345 | | NFS_INO_INVALID_ACL | |
1346 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
1347 | if (S_ISDIR(inode->i_mode)) |
1348 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1349 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1350 | } |
62ab460c TM |
1351 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1352 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1353 | |
1354 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1355 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
62ab460c TM |
1356 | } else if (server->caps & NFS_CAP_MTIME) |
1357 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1358 | | NFS_INO_REVAL_FORCED); |
1359 | ||
9e6e70f8 | 1360 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1361 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
62ab460c TM |
1362 | } else if (server->caps & NFS_CAP_CTIME) |
1363 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
62ab460c | 1364 | | NFS_INO_REVAL_FORCED); |
47aabaa7 | 1365 | |
951a143b | 1366 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1367 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1368 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1369 | cur_isize = i_size_read(inode); | |
1370 | if (new_isize != cur_isize) { | |
1371 | /* Do we perhaps have any outstanding writes, or has | |
1372 | * the file grown beyond our last write? */ | |
0f66b598 PT |
1373 | if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) || |
1374 | new_isize > cur_isize) { | |
9e6e70f8 TM |
1375 | i_size_write(inode, new_isize); |
1376 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1377 | } | |
60c16ea8 HJ |
1378 | dprintk("NFS: isize change on server for file %s/%ld " |
1379 | "(%Ld to %Ld)\n", | |
1380 | inode->i_sb->s_id, | |
1381 | inode->i_ino, | |
1382 | (long long)cur_isize, | |
1383 | (long long)new_isize); | |
1da177e4 | 1384 | } |
62ab460c TM |
1385 | } else |
1386 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1387 | | NFS_INO_REVAL_PAGECACHE | |
1388 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1389 | |
1da177e4 | 1390 | |
9e6e70f8 TM |
1391 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1392 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1393 | else if (server->caps & NFS_CAP_ATIME) |
1394 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1395 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1396 | |
9e6e70f8 TM |
1397 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1398 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1399 | umode_t newmode = inode->i_mode & S_IFMT; |
1400 | newmode |= fattr->mode & S_IALLUGO; | |
1401 | inode->i_mode = newmode; | |
9e6e70f8 | 1402 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1403 | } |
62ab460c TM |
1404 | } else if (server->caps & NFS_CAP_MODE) |
1405 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1406 | | NFS_INO_INVALID_ACCESS | |
1407 | | NFS_INO_INVALID_ACL | |
1408 | | NFS_INO_REVAL_FORCED); | |
1409 | ||
9e6e70f8 TM |
1410 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1411 | if (inode->i_uid != fattr->uid) { | |
1412 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1413 | inode->i_uid = fattr->uid; | |
1414 | } | |
62ab460c TM |
1415 | } else if (server->caps & NFS_CAP_OWNER) |
1416 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1417 | | NFS_INO_INVALID_ACCESS | |
1418 | | NFS_INO_INVALID_ACL | |
1419 | | NFS_INO_REVAL_FORCED); | |
1420 | ||
9e6e70f8 TM |
1421 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1422 | if (inode->i_gid != fattr->gid) { | |
1423 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1424 | inode->i_gid = fattr->gid; | |
1425 | } | |
62ab460c TM |
1426 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1427 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1428 | | NFS_INO_INVALID_ACCESS | |
1429 | | NFS_INO_INVALID_ACL | |
1430 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1431 | |
9e6e70f8 TM |
1432 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1433 | if (inode->i_nlink != fattr->nlink) { | |
1434 | invalid |= NFS_INO_INVALID_ATTR; | |
1435 | if (S_ISDIR(inode->i_mode)) | |
1436 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1437 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1438 | } |
62ab460c TM |
1439 | } else if (server->caps & NFS_CAP_NLINK) |
1440 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1441 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1442 | |
9e6e70f8 | 1443 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1444 | /* |
1445 | * report the blocks in 512byte units | |
1446 | */ | |
1447 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1448 | } |
9e6e70f8 TM |
1449 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1450 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1451 | |
1452 | /* Update attrtimeo value if we're out of the unstable period */ | |
1453 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1454 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1455 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1456 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1457 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1458 | } else { |
64672d55 | 1459 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1460 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1461 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1462 | nfsi->attrtimeo_timestamp = now; | |
1463 | } | |
1da177e4 | 1464 | } |
f2115dc9 | 1465 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1466 | /* Don't invalidate the data if we were to blame */ |
1467 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1468 | || S_ISLNK(inode->i_mode))) | |
1469 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1470 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1471 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1472 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1473 | |
1474 | return 0; | |
b37b03b7 | 1475 | out_err: |
1da177e4 LT |
1476 | /* |
1477 | * No need to worry about unhashing the dentry, as the | |
1478 | * lookup validation will know that the inode is bad. | |
1479 | * (But we fall through to invalidate the caches.) | |
1480 | */ | |
1481 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1482 | return -ESTALE; |
1483 | } | |
1484 | ||
f7b422b1 | 1485 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1486 | { |
1487 | struct nfs_inode *nfsi; | |
e94b1766 | 1488 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1489 | if (!nfsi) |
1490 | return NULL; | |
55296809 CL |
1491 | nfsi->flags = 0UL; |
1492 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1493 | #ifdef CONFIG_NFS_V3_ACL |
1494 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1495 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1496 | #endif | |
e50a1c2e BF |
1497 | #ifdef CONFIG_NFS_V4 |
1498 | nfsi->nfs4_acl = NULL; | |
1499 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1500 | return &nfsi->vfs_inode; |
1501 | } | |
1502 | ||
fa0d7e3d | 1503 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1504 | { |
fa0d7e3d | 1505 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1506 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1507 | } | |
1508 | ||
fa0d7e3d NP |
1509 | void nfs_destroy_inode(struct inode *inode) |
1510 | { | |
1511 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1512 | } | |
1513 | ||
d75d5414 AM |
1514 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1515 | { | |
1516 | #ifdef CONFIG_NFS_V4 | |
1517 | INIT_LIST_HEAD(&nfsi->open_states); | |
1518 | nfsi->delegation = NULL; | |
1519 | nfsi->delegation_state = 0; | |
1520 | init_rwsem(&nfsi->rwsem); | |
e5e94017 | 1521 | nfsi->layout = NULL; |
d75d5414 AM |
1522 | #endif |
1523 | } | |
f7b422b1 | 1524 | |
51cc5068 | 1525 | static void init_once(void *foo) |
1da177e4 LT |
1526 | { |
1527 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1528 | ||
a35afb83 | 1529 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1530 | INIT_LIST_HEAD(&nfsi->open_files); |
1531 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1532 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1533 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
a35afb83 | 1534 | nfsi->npages = 0; |
ea2cf228 | 1535 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1536 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
565277f6 TM |
1537 | atomic_set(&nfsi->silly_count, 1); |
1538 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1539 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1540 | nfs4_init_once(nfsi); |
1da177e4 | 1541 | } |
20c2df83 | 1542 | |
f7b422b1 | 1543 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1544 | { |
1545 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1546 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1547 | 0, (SLAB_RECLAIM_ACCOUNT| |
1548 | SLAB_MEM_SPREAD), | |
20c2df83 | 1549 | init_once); |
1da177e4 LT |
1550 | if (nfs_inode_cachep == NULL) |
1551 | return -ENOMEM; | |
1552 | ||
1553 | return 0; | |
1554 | } | |
1555 | ||
266bee88 | 1556 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1557 | { |
1a1d92c1 | 1558 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1559 | } |
1560 | ||
5746006f TM |
1561 | struct workqueue_struct *nfsiod_workqueue; |
1562 | ||
1563 | /* | |
1564 | * start up the nfsiod workqueue | |
1565 | */ | |
1566 | static int nfsiod_start(void) | |
1567 | { | |
1568 | struct workqueue_struct *wq; | |
1569 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1570 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1571 | if (wq == NULL) |
1572 | return -ENOMEM; | |
1573 | nfsiod_workqueue = wq; | |
1574 | return 0; | |
1575 | } | |
1576 | ||
1577 | /* | |
1578 | * Destroy the nfsiod workqueue | |
1579 | */ | |
1580 | static void nfsiod_stop(void) | |
1581 | { | |
1582 | struct workqueue_struct *wq; | |
1583 | ||
1584 | wq = nfsiod_workqueue; | |
1585 | if (wq == NULL) | |
1586 | return; | |
1587 | nfsiod_workqueue = NULL; | |
1588 | destroy_workqueue(wq); | |
1589 | } | |
1590 | ||
1b340d01 | 1591 | int nfs_net_id; |
9e2e74db | 1592 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
1593 | |
1594 | static int nfs_net_init(struct net *net) | |
1595 | { | |
6b13168b | 1596 | nfs_clients_init(net); |
1b340d01 SK |
1597 | return nfs_dns_resolver_cache_init(net); |
1598 | } | |
1599 | ||
1600 | static void nfs_net_exit(struct net *net) | |
1601 | { | |
1602 | nfs_dns_resolver_cache_destroy(net); | |
28cd1b3f | 1603 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
1604 | } |
1605 | ||
1606 | static struct pernet_operations nfs_net_ops = { | |
1607 | .init = nfs_net_init, | |
1608 | .exit = nfs_net_exit, | |
1609 | .id = &nfs_net_id, | |
1610 | .size = sizeof(struct nfs_net), | |
1611 | }; | |
1612 | ||
1da177e4 LT |
1613 | /* |
1614 | * Initialize NFS | |
1615 | */ | |
1616 | static int __init init_nfs_fs(void) | |
1617 | { | |
1618 | int err; | |
1619 | ||
e571cbf1 | 1620 | err = nfs_dns_resolver_init(); |
1b340d01 | 1621 | if (err < 0) |
129d1977 | 1622 | goto out11; |
1b340d01 SK |
1623 | |
1624 | err = register_pernet_subsys(&nfs_net_ops); | |
e571cbf1 | 1625 | if (err < 0) |
129d1977 | 1626 | goto out10; |
e571cbf1 | 1627 | |
8ec442ae DH |
1628 | err = nfs_fscache_register(); |
1629 | if (err < 0) | |
129d1977 | 1630 | goto out9; |
8ec442ae | 1631 | |
5746006f TM |
1632 | err = nfsiod_start(); |
1633 | if (err) | |
129d1977 | 1634 | goto out8; |
5746006f | 1635 | |
6aaca566 DH |
1636 | err = nfs_fs_proc_init(); |
1637 | if (err) | |
129d1977 | 1638 | goto out7; |
6aaca566 | 1639 | |
1da177e4 LT |
1640 | err = nfs_init_nfspagecache(); |
1641 | if (err) | |
129d1977 | 1642 | goto out6; |
1da177e4 LT |
1643 | |
1644 | err = nfs_init_inodecache(); | |
1645 | if (err) | |
129d1977 | 1646 | goto out5; |
1da177e4 LT |
1647 | |
1648 | err = nfs_init_readpagecache(); | |
1649 | if (err) | |
129d1977 | 1650 | goto out4; |
1da177e4 LT |
1651 | |
1652 | err = nfs_init_writepagecache(); | |
1653 | if (err) | |
129d1977 | 1654 | goto out3; |
1da177e4 | 1655 | |
1da177e4 LT |
1656 | err = nfs_init_directcache(); |
1657 | if (err) | |
129d1977 | 1658 | goto out2; |
1da177e4 LT |
1659 | |
1660 | #ifdef CONFIG_PROC_FS | |
ec7652aa | 1661 | rpc_proc_register(&init_net, &nfs_rpcstat); |
1da177e4 | 1662 | #endif |
129d1977 | 1663 | |
ab7017a3 | 1664 | err = nfs_register_versions(); |
129d1977 BS |
1665 | if (err) |
1666 | goto out1; | |
129d1977 | 1667 | |
f7b422b1 | 1668 | if ((err = register_nfs_fs()) != 0) |
129d1977 BS |
1669 | goto out0; |
1670 | ||
1da177e4 | 1671 | return 0; |
129d1977 | 1672 | out0: |
ab7017a3 | 1673 | nfs_unregister_versions(); |
129d1977 | 1674 | out1: |
1da177e4 | 1675 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1676 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1677 | #endif |
1da177e4 | 1678 | nfs_destroy_directcache(); |
1da177e4 | 1679 | out2: |
129d1977 | 1680 | nfs_destroy_writepagecache(); |
1da177e4 | 1681 | out3: |
129d1977 | 1682 | nfs_destroy_readpagecache(); |
1da177e4 | 1683 | out4: |
129d1977 | 1684 | nfs_destroy_inodecache(); |
6aaca566 | 1685 | out5: |
129d1977 | 1686 | nfs_destroy_nfspagecache(); |
5746006f | 1687 | out6: |
129d1977 | 1688 | nfs_fs_proc_exit(); |
8ec442ae | 1689 | out7: |
129d1977 | 1690 | nfsiod_stop(); |
e571cbf1 | 1691 | out8: |
129d1977 | 1692 | nfs_fscache_unregister(); |
955a857e | 1693 | out9: |
129d1977 | 1694 | unregister_pernet_subsys(&nfs_net_ops); |
1b340d01 | 1695 | out10: |
129d1977 BS |
1696 | nfs_dns_resolver_destroy(); |
1697 | out11: | |
1da177e4 LT |
1698 | return err; |
1699 | } | |
1700 | ||
1701 | static void __exit exit_nfs_fs(void) | |
1702 | { | |
129d1977 BS |
1703 | #ifdef CONFIG_NFS_V4 |
1704 | exit_nfs_v4(); | |
1705 | #endif | |
1da177e4 | 1706 | nfs_destroy_directcache(); |
1da177e4 LT |
1707 | nfs_destroy_writepagecache(); |
1708 | nfs_destroy_readpagecache(); | |
1709 | nfs_destroy_inodecache(); | |
1710 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1711 | nfs_fscache_unregister(); |
1b340d01 | 1712 | unregister_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 1713 | nfs_dns_resolver_destroy(); |
1da177e4 | 1714 | #ifdef CONFIG_PROC_FS |
ec7652aa | 1715 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 1716 | #endif |
f7b422b1 | 1717 | unregister_nfs_fs(); |
6aaca566 | 1718 | nfs_fs_proc_exit(); |
5746006f | 1719 | nfsiod_stop(); |
1da177e4 LT |
1720 | } |
1721 | ||
1722 | /* Not quite true; I just maintain it */ | |
1723 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1724 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1725 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1726 | |
1727 | module_init(init_nfs_fs) | |
1728 | module_exit(exit_nfs_fs) |