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> | |
1da177e4 LT |
39 | |
40 | #include <asm/system.h> | |
41 | #include <asm/uaccess.h> | |
42 | ||
4ce79717 | 43 | #include "nfs4_fs.h" |
a72b4422 | 44 | #include "callback.h" |
1da177e4 | 45 | #include "delegation.h" |
d9ef5a8c | 46 | #include "iostat.h" |
f7b422b1 | 47 | #include "internal.h" |
8ec442ae | 48 | #include "fscache.h" |
e571cbf1 | 49 | #include "dns_resolve.h" |
1da177e4 LT |
50 | |
51 | #define NFSDBG_FACILITY NFSDBG_VFS | |
1da177e4 | 52 | |
f43bf0be TM |
53 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
54 | ||
55 | /* Default is to see 64-bit inode numbers */ | |
56 | static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; | |
57 | ||
1da177e4 | 58 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 59 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 60 | |
e18b890b | 61 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 62 | |
1da177e4 LT |
63 | static inline unsigned long |
64 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
65 | { | |
66 | return nfs_fileid_to_ino_t(fattr->fileid); | |
67 | } | |
68 | ||
72cb77f4 TM |
69 | /** |
70 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
71 | * @word: long word containing the bit lock | |
72 | */ | |
73 | int nfs_wait_bit_killable(void *word) | |
74 | { | |
75 | if (fatal_signal_pending(current)) | |
76 | return -ERESTARTSYS; | |
77 | schedule(); | |
78 | return 0; | |
79 | } | |
80 | ||
f43bf0be TM |
81 | /** |
82 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
83 | * @fileid: 64-bit fileid | |
84 | * | |
85 | * This function returns a 32-bit inode number if the boot parameter | |
86 | * nfs.enable_ino64 is zero. | |
87 | */ | |
88 | u64 nfs_compat_user_ino64(u64 fileid) | |
89 | { | |
90 | int ino; | |
91 | ||
92 | if (enable_ino64) | |
93 | return fileid; | |
94 | ino = fileid; | |
95 | if (sizeof(ino) < sizeof(fileid)) | |
96 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
97 | return ino; | |
98 | } | |
99 | ||
f7b422b1 | 100 | int nfs_write_inode(struct inode *inode, int sync) |
1da177e4 | 101 | { |
1da177e4 LT |
102 | int ret; |
103 | ||
d30c8348 TM |
104 | if (sync) { |
105 | ret = filemap_fdatawait(inode->i_mapping); | |
106 | if (ret == 0) | |
107 | ret = nfs_commit_inode(inode, FLUSH_SYNC); | |
108 | } else | |
109 | ret = nfs_commit_inode(inode, 0); | |
110 | if (ret >= 0) | |
111 | return 0; | |
112 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); | |
113 | return ret; | |
1da177e4 LT |
114 | } |
115 | ||
f7b422b1 | 116 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 117 | { |
da6d503a TM |
118 | /* |
119 | * The following should never happen... | |
120 | */ | |
121 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 122 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 123 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 124 | nfs_access_zap_cache(inode); |
ef79c097 | 125 | nfs_fscache_release_inode_cookie(inode); |
1da177e4 LT |
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 | { | |
133 | int ret; | |
134 | ||
135 | if (mapping->nrpages == 0) | |
136 | return 0; | |
137 | unmap_mapping_range(mapping, 0, 0, 0); | |
28fd1298 | 138 | ret = filemap_write_and_wait(mapping); |
29884df0 TM |
139 | if (ret != 0) |
140 | goto out; | |
141 | ret = nfs_wb_all(mapping->host); | |
142 | out: | |
143 | return ret; | |
144 | } | |
145 | ||
1da177e4 LT |
146 | /* |
147 | * Invalidate the local caches | |
148 | */ | |
b37b03b7 | 149 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
150 | { |
151 | struct nfs_inode *nfsi = NFS_I(inode); | |
152 | int mode = inode->i_mode; | |
153 | ||
91d5b470 CL |
154 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
155 | ||
c7c20973 TM |
156 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
157 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 LT |
158 | |
159 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
160 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 161 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 162 | else |
55296809 | 163 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 164 | } |
dc59250c | 165 | |
b37b03b7 TM |
166 | void nfs_zap_caches(struct inode *inode) |
167 | { | |
168 | spin_lock(&inode->i_lock); | |
169 | nfs_zap_caches_locked(inode); | |
dc59250c | 170 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
171 | } |
172 | ||
cd9ae2b6 TM |
173 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
174 | { | |
175 | if (mapping->nrpages != 0) { | |
176 | spin_lock(&inode->i_lock); | |
177 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
178 | spin_unlock(&inode->i_lock); | |
179 | } | |
180 | } | |
181 | ||
f41f7418 | 182 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
183 | { |
184 | void (*clear_acl_cache)(struct inode *); | |
185 | ||
186 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
187 | if (clear_acl_cache != NULL) | |
188 | clear_acl_cache(inode); | |
dc59250c | 189 | spin_lock(&inode->i_lock); |
55296809 | 190 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 191 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
192 | } |
193 | ||
c4812998 TM |
194 | void nfs_invalidate_atime(struct inode *inode) |
195 | { | |
196 | spin_lock(&inode->i_lock); | |
197 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
198 | spin_unlock(&inode->i_lock); | |
199 | } | |
200 | ||
1da177e4 | 201 | /* |
b37b03b7 TM |
202 | * Invalidate, but do not unhash, the inode. |
203 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 204 | */ |
b37b03b7 | 205 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 206 | { |
3a10c30a | 207 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 208 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
209 | } |
210 | ||
211 | struct nfs_find_desc { | |
212 | struct nfs_fh *fh; | |
213 | struct nfs_fattr *fattr; | |
214 | }; | |
215 | ||
216 | /* | |
217 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
218 | * this, and re-exported directories (also seen in NFSv2) | |
219 | * we are forced to allow 2 different inodes to have the same | |
220 | * i_ino. | |
221 | */ | |
222 | static int | |
223 | nfs_find_actor(struct inode *inode, void *opaque) | |
224 | { | |
225 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
226 | struct nfs_fh *fh = desc->fh; | |
227 | struct nfs_fattr *fattr = desc->fattr; | |
228 | ||
229 | if (NFS_FILEID(inode) != fattr->fileid) | |
230 | return 0; | |
231 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
232 | return 0; | |
233 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
234 | return 0; | |
235 | return 1; | |
236 | } | |
237 | ||
238 | static int | |
239 | nfs_init_locked(struct inode *inode, void *opaque) | |
240 | { | |
241 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
242 | struct nfs_fattr *fattr = desc->fattr; | |
243 | ||
99fadcd7 | 244 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
245 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
246 | return 0; | |
247 | } | |
248 | ||
249 | /* Don't use READDIRPLUS on directories that we believe are too large */ | |
250 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) | |
251 | ||
252 | /* | |
253 | * This is our front-end to iget that looks up inodes by file handle | |
254 | * instead of inode number. | |
255 | */ | |
256 | struct inode * | |
257 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
258 | { | |
259 | struct nfs_find_desc desc = { | |
260 | .fh = fh, | |
261 | .fattr = fattr | |
262 | }; | |
03f28e3a | 263 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
264 | unsigned long hash; |
265 | ||
9e6e70f8 | 266 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) |
1da177e4 | 267 | goto out_no_inode; |
9e6e70f8 | 268 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 269 | goto out_no_inode; |
1da177e4 LT |
270 | |
271 | hash = nfs_fattr_to_ino_t(fattr); | |
272 | ||
03f28e3a TM |
273 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
274 | if (inode == NULL) { | |
275 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 276 | goto out_no_inode; |
03f28e3a | 277 | } |
1da177e4 LT |
278 | |
279 | if (inode->i_state & I_NEW) { | |
280 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 281 | unsigned long now = jiffies; |
1da177e4 LT |
282 | |
283 | /* We set i_ino for the few things that still rely on it, | |
284 | * such as stat(2) */ | |
285 | inode->i_ino = hash; | |
286 | ||
287 | /* We can't support update_atime(), since the server will reset it */ | |
288 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
289 | inode->i_mode = fattr->mode; | |
62ab460c TM |
290 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
291 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
292 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
293 | | NFS_INO_INVALID_ACCESS | |
294 | | NFS_INO_INVALID_ACL; | |
1da177e4 LT |
295 | /* Why so? Because we want revalidate for devices/FIFOs, and |
296 | * that's precisely what we have in nfs_file_inode_operations. | |
297 | */ | |
8fa5c000 | 298 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 LT |
299 | if (S_ISREG(inode->i_mode)) { |
300 | inode->i_fop = &nfs_file_operations; | |
301 | inode->i_data.a_ops = &nfs_file_aops; | |
302 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
303 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 304 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 LT |
305 | inode->i_fop = &nfs_dir_operations; |
306 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) | |
307 | && fattr->size <= NFS_LIMIT_READDIRPLUS) | |
3a10c30a | 308 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
55a97593 | 309 | /* Deal with crossing mountpoints */ |
9e6e70f8 TM |
310 | if ((fattr->valid & NFS_ATTR_FATTR_FSID) |
311 | && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { | |
6b97fd3d MN |
312 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
313 | inode->i_op = &nfs_referral_inode_operations; | |
314 | else | |
315 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 316 | inode->i_fop = NULL; |
c37dcd33 | 317 | set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags); |
55a97593 | 318 | } |
1da177e4 LT |
319 | } else if (S_ISLNK(inode->i_mode)) |
320 | inode->i_op = &nfs_symlink_inode_operations; | |
321 | else | |
322 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
323 | ||
9e6e70f8 TM |
324 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
325 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
326 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
327 | nfsi->change_attr = 0; | |
328 | inode->i_size = 0; | |
329 | inode->i_nlink = 0; | |
330 | inode->i_uid = -2; | |
331 | inode->i_gid = -2; | |
332 | inode->i_blocks = 0; | |
333 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
334 | ||
33801147 | 335 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 336 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
337 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
338 | inode->i_atime = fattr->atime; | |
62ab460c TM |
339 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
340 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
341 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
342 | inode->i_mtime = fattr->mtime; | |
62ab460c TM |
343 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
344 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
345 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
346 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
347 | inode->i_ctime = fattr->ctime; | |
62ab460c TM |
348 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
349 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
350 | | NFS_INO_INVALID_ACCESS | |
351 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 | 352 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
1da177e4 | 353 | nfsi->change_attr = fattr->change_attr; |
62ab460c TM |
354 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
355 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
356 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
357 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
358 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
359 | else |
360 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
361 | | NFS_INO_INVALID_DATA | |
362 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
363 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
364 | inode->i_nlink = fattr->nlink; | |
62ab460c TM |
365 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
366 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
367 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
368 | inode->i_uid = fattr->uid; | |
62ab460c TM |
369 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
370 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
371 | | NFS_INO_INVALID_ACCESS | |
372 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
373 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
374 | inode->i_gid = fattr->gid; | |
62ab460c TM |
375 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
376 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
377 | | NFS_INO_INVALID_ACCESS | |
378 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
379 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
380 | inode->i_blocks = fattr->du.nfs2.blocks; | |
381 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
382 | /* |
383 | * report the blocks in 512byte units | |
384 | */ | |
385 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
386 | } |
387 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 388 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 389 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 390 | |
ef79c097 DH |
391 | nfs_fscache_init_inode_cookie(inode); |
392 | ||
1da177e4 LT |
393 | unlock_new_inode(inode); |
394 | } else | |
395 | nfs_refresh_inode(inode, fattr); | |
396 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
397 | inode->i_sb->s_id, | |
398 | (long long)NFS_FILEID(inode), | |
399 | atomic_read(&inode->i_count)); | |
400 | ||
401 | out: | |
402 | return inode; | |
403 | ||
404 | out_no_inode: | |
03f28e3a | 405 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
406 | goto out; |
407 | } | |
408 | ||
659bfcd6 | 409 | #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 |
410 | |
411 | int | |
412 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
413 | { | |
414 | struct inode *inode = dentry->d_inode; | |
415 | struct nfs_fattr fattr; | |
416 | int error; | |
417 | ||
91d5b470 CL |
418 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
419 | ||
188b95dd JL |
420 | /* skip mode change if it's just for clearing setuid/setgid */ |
421 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
422 | attr->ia_valid &= ~ATTR_MODE; | |
423 | ||
1da177e4 LT |
424 | if (attr->ia_valid & ATTR_SIZE) { |
425 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
426 | attr->ia_valid &= ~ATTR_SIZE; | |
427 | } | |
428 | ||
429 | /* Optimization: if the end result is no change, don't RPC */ | |
430 | attr->ia_valid &= NFS_VALID_ATTRS; | |
659bfcd6 | 431 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
1da177e4 LT |
432 | return 0; |
433 | ||
755c1e20 | 434 | /* Write all dirty data */ |
e1552e19 TM |
435 | if (S_ISREG(inode->i_mode)) { |
436 | filemap_write_and_wait(inode->i_mapping); | |
437 | nfs_wb_all(inode); | |
438 | } | |
642ac549 TM |
439 | /* |
440 | * Return any delegations if we're going to change ACLs | |
441 | */ | |
442 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
443 | nfs_inode_return_delegation(inode); | |
1da177e4 | 444 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
65e4308d | 445 | if (error == 0) |
1da177e4 | 446 | nfs_refresh_inode(inode, &fattr); |
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 | { | |
461 | if (i_size_read(inode) < offset) { | |
462 | unsigned long limit; | |
463 | ||
464 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; | |
465 | if (limit != RLIM_INFINITY && offset > limit) | |
466 | goto out_sig; | |
467 | if (offset > inode->i_sb->s_maxbytes) | |
468 | goto out_big; | |
469 | spin_lock(&inode->i_lock); | |
470 | i_size_write(inode, offset); | |
471 | spin_unlock(&inode->i_lock); | |
472 | } else { | |
473 | struct address_space *mapping = inode->i_mapping; | |
474 | ||
475 | /* | |
476 | * truncation of in-use swapfiles is disallowed - it would | |
477 | * cause subsequent swapout to scribble on the now-freed | |
478 | * blocks. | |
479 | */ | |
480 | if (IS_SWAPFILE(inode)) | |
481 | return -ETXTBSY; | |
482 | spin_lock(&inode->i_lock); | |
483 | i_size_write(inode, offset); | |
484 | spin_unlock(&inode->i_lock); | |
485 | ||
486 | /* | |
487 | * unmap_mapping_range is called twice, first simply for | |
488 | * efficiency so that truncate_inode_pages does fewer | |
489 | * single-page unmaps. However after this first call, and | |
490 | * before truncate_inode_pages finishes, it is possible for | |
491 | * private pages to be COWed, which remain after | |
492 | * truncate_inode_pages finishes, hence the second | |
493 | * unmap_mapping_range call must be made for correctness. | |
494 | */ | |
495 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); | |
496 | truncate_inode_pages(mapping, offset); | |
497 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); | |
498 | } | |
499 | return 0; | |
500 | out_sig: | |
501 | send_sig(SIGXFSZ, current, 0); | |
502 | out_big: | |
503 | return -EFBIG; | |
504 | } | |
505 | ||
65e4308d TM |
506 | /** |
507 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
508 | * @inode: pointer to struct inode | |
509 | * @attr: pointer to struct iattr | |
510 | * | |
511 | * Note: we do this in the *proc.c in order to ensure that | |
512 | * it works for things like exclusive creates too. | |
513 | */ | |
514 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
515 | { | |
516 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 517 | spin_lock(&inode->i_lock); |
1da177e4 | 518 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
519 | int mode = attr->ia_mode & S_IALLUGO; |
520 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
521 | inode->i_mode = mode; |
522 | } | |
523 | if ((attr->ia_valid & ATTR_UID) != 0) | |
524 | inode->i_uid = attr->ia_uid; | |
525 | if ((attr->ia_valid & ATTR_GID) != 0) | |
526 | inode->i_gid = attr->ia_gid; | |
55296809 | 527 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 528 | spin_unlock(&inode->i_lock); |
65e4308d TM |
529 | } |
530 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 531 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 532 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 533 | } |
1da177e4 LT |
534 | } |
535 | ||
1da177e4 LT |
536 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
537 | { | |
538 | struct inode *inode = dentry->d_inode; | |
55296809 | 539 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
540 | int err; |
541 | ||
28c494c5 CL |
542 | /* |
543 | * Flush out writes to the server in order to update c/mtime. | |
544 | * | |
545 | * Hold the i_mutex to suspend application writes temporarily; | |
546 | * this prevents long-running writing applications from blocking | |
547 | * nfs_wb_nocommit. | |
548 | */ | |
549 | if (S_ISREG(inode->i_mode)) { | |
550 | mutex_lock(&inode->i_mutex); | |
ed90ef51 | 551 | nfs_wb_nocommit(inode); |
28c494c5 CL |
552 | mutex_unlock(&inode->i_mutex); |
553 | } | |
fc33a7bb CH |
554 | |
555 | /* | |
556 | * We may force a getattr if the user cares about atime. | |
557 | * | |
558 | * Note that we only have to check the vfsmount flags here: | |
559 | * - NFS always sets S_NOATIME by so checking it would give a | |
560 | * bogus result | |
561 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
562 | * no point in checking those. | |
563 | */ | |
564 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
565 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 566 | need_atime = 0; |
fc33a7bb | 567 | |
1da177e4 LT |
568 | if (need_atime) |
569 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
570 | else | |
571 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 572 | if (!err) { |
1da177e4 | 573 | generic_fillattr(inode, stat); |
f43bf0be | 574 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 575 | } |
1da177e4 LT |
576 | return err; |
577 | } | |
578 | ||
7fe5c398 TM |
579 | /** |
580 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
581 | * @ctx: pointer to context | |
582 | * @is_sync: is this a synchronous close | |
583 | * | |
584 | * always ensure that the attributes are up to date if we're mounted | |
585 | * with close-to-open semantics | |
586 | */ | |
587 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
588 | { | |
589 | struct inode *inode; | |
590 | struct nfs_server *server; | |
591 | ||
592 | if (!(ctx->mode & FMODE_WRITE)) | |
593 | return; | |
594 | if (!is_sync) | |
595 | return; | |
596 | inode = ctx->path.dentry->d_inode; | |
597 | if (!list_empty(&NFS_I(inode)->open_files)) | |
598 | return; | |
599 | server = NFS_SERVER(inode); | |
600 | if (server->flags & NFS_MOUNT_NOCTO) | |
601 | return; | |
602 | nfs_revalidate_inode(server, inode); | |
603 | } | |
604 | ||
b92dccf6 | 605 | static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred) |
1da177e4 LT |
606 | { |
607 | struct nfs_open_context *ctx; | |
608 | ||
f52720ca | 609 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
1da177e4 | 610 | if (ctx != NULL) { |
88be9f99 TM |
611 | ctx->path.dentry = dget(dentry); |
612 | ctx->path.mnt = mntget(mnt); | |
1da177e4 LT |
613 | ctx->cred = get_rpccred(cred); |
614 | ctx->state = NULL; | |
615 | ctx->lockowner = current->files; | |
66d3aac0 | 616 | ctx->flags = 0; |
1da177e4 | 617 | ctx->error = 0; |
00a92642 | 618 | ctx->dir_cookie = 0; |
5e11934d | 619 | atomic_set(&ctx->count, 1); |
1da177e4 LT |
620 | } |
621 | return ctx; | |
622 | } | |
623 | ||
624 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
625 | { | |
626 | if (ctx != NULL) | |
5e11934d | 627 | atomic_inc(&ctx->count); |
1da177e4 LT |
628 | return ctx; |
629 | } | |
630 | ||
7fe5c398 | 631 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 632 | { |
7fe5c398 | 633 | struct inode *inode = ctx->path.dentry->d_inode; |
3bec63db | 634 | |
5e11934d TM |
635 | if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock)) |
636 | return; | |
637 | list_del(&ctx->list); | |
638 | spin_unlock(&inode->i_lock); | |
7fe5c398 | 639 | NFS_PROTO(inode)->close_context(ctx, is_sync); |
3bec63db TM |
640 | if (ctx->cred != NULL) |
641 | put_rpccred(ctx->cred); | |
31f31db1 | 642 | path_put(&ctx->path); |
3bec63db TM |
643 | kfree(ctx); |
644 | } | |
645 | ||
a49c3c77 TM |
646 | void put_nfs_open_context(struct nfs_open_context *ctx) |
647 | { | |
648 | __put_nfs_open_context(ctx, 0); | |
649 | } | |
650 | ||
651 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) | |
652 | { | |
653 | __put_nfs_open_context(ctx, 1); | |
654 | } | |
655 | ||
1da177e4 LT |
656 | /* |
657 | * Ensure that mmap has a recent RPC credential for use when writing out | |
658 | * shared pages | |
659 | */ | |
b92dccf6 | 660 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 661 | { |
01cce933 | 662 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
663 | struct nfs_inode *nfsi = NFS_I(inode); |
664 | ||
665 | filp->private_data = get_nfs_open_context(ctx); | |
666 | spin_lock(&inode->i_lock); | |
667 | list_add(&ctx->list, &nfsi->open_files); | |
668 | spin_unlock(&inode->i_lock); | |
669 | } | |
670 | ||
d530838b TM |
671 | /* |
672 | * Given an inode, search for an open context with the desired characteristics | |
673 | */ | |
dc0b027d | 674 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
675 | { |
676 | struct nfs_inode *nfsi = NFS_I(inode); | |
677 | struct nfs_open_context *pos, *ctx = NULL; | |
678 | ||
679 | spin_lock(&inode->i_lock); | |
680 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
681 | if (cred != NULL && pos->cred != cred) |
682 | continue; | |
1da177e4 LT |
683 | if ((pos->mode & mode) == mode) { |
684 | ctx = get_nfs_open_context(pos); | |
685 | break; | |
686 | } | |
687 | } | |
688 | spin_unlock(&inode->i_lock); | |
689 | return ctx; | |
690 | } | |
691 | ||
b92dccf6 | 692 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 693 | { |
01cce933 | 694 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 695 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
696 | |
697 | if (ctx) { | |
698 | filp->private_data = NULL; | |
699 | spin_lock(&inode->i_lock); | |
700 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
701 | spin_unlock(&inode->i_lock); | |
a49c3c77 | 702 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
703 | } |
704 | } | |
705 | ||
706 | /* | |
707 | * These allocate and release file read/write context information. | |
708 | */ | |
709 | int nfs_open(struct inode *inode, struct file *filp) | |
710 | { | |
711 | struct nfs_open_context *ctx; | |
712 | struct rpc_cred *cred; | |
713 | ||
98a8e323 | 714 | cred = rpc_lookup_cred(); |
1da177e4 LT |
715 | if (IS_ERR(cred)) |
716 | return PTR_ERR(cred); | |
01cce933 | 717 | ctx = alloc_nfs_open_context(filp->f_path.mnt, filp->f_path.dentry, cred); |
1da177e4 LT |
718 | put_rpccred(cred); |
719 | if (ctx == NULL) | |
720 | return -ENOMEM; | |
721 | ctx->mode = filp->f_mode; | |
722 | nfs_file_set_open_context(filp, ctx); | |
723 | put_nfs_open_context(ctx); | |
ef79c097 | 724 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
725 | return 0; |
726 | } | |
727 | ||
728 | int nfs_release(struct inode *inode, struct file *filp) | |
729 | { | |
1da177e4 LT |
730 | nfs_file_clear_open_context(filp); |
731 | return 0; | |
732 | } | |
733 | ||
734 | /* | |
735 | * This function is called whenever some part of NFS notices that | |
736 | * the cached attributes have to be refreshed. | |
737 | */ | |
738 | int | |
739 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
740 | { | |
741 | int status = -ESTALE; | |
742 | struct nfs_fattr fattr; | |
743 | struct nfs_inode *nfsi = NFS_I(inode); | |
1da177e4 LT |
744 | |
745 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
746 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
747 | ||
85233a7a | 748 | if (is_bad_inode(inode)) |
691beb13 | 749 | goto out; |
1da177e4 | 750 | if (NFS_STALE(inode)) |
412d582e | 751 | goto out; |
7fdc49c4 | 752 | |
691beb13 | 753 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
1da177e4 LT |
754 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
755 | if (status != 0) { | |
756 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
757 | inode->i_sb->s_id, | |
758 | (long long)NFS_FILEID(inode), status); | |
759 | if (status == -ESTALE) { | |
760 | nfs_zap_caches(inode); | |
761 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 762 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
763 | } |
764 | goto out; | |
765 | } | |
766 | ||
4dc05efb | 767 | status = nfs_refresh_inode(inode, &fattr); |
1da177e4 LT |
768 | if (status) { |
769 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
770 | inode->i_sb->s_id, | |
771 | (long long)NFS_FILEID(inode), status); | |
772 | goto out; | |
773 | } | |
55296809 | 774 | |
24aa1fe6 | 775 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 776 | nfs_zap_acl_cache(inode); |
55296809 | 777 | |
1da177e4 LT |
778 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
779 | inode->i_sb->s_id, | |
780 | (long long)NFS_FILEID(inode)); | |
781 | ||
412d582e | 782 | out: |
1da177e4 LT |
783 | return status; |
784 | } | |
785 | ||
786 | int nfs_attribute_timeout(struct inode *inode) | |
787 | { | |
788 | struct nfs_inode *nfsi = NFS_I(inode); | |
789 | ||
790 | if (nfs_have_delegation(inode, FMODE_READ)) | |
791 | return 0; | |
64672d55 | 792 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
1da177e4 LT |
793 | } |
794 | ||
795 | /** | |
796 | * nfs_revalidate_inode - Revalidate the inode attributes | |
797 | * @server - pointer to nfs_server struct | |
798 | * @inode - pointer to inode struct | |
799 | * | |
800 | * Updates inode attribute information by retrieving the data from the server. | |
801 | */ | |
802 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
803 | { | |
44b11874 | 804 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
1da177e4 LT |
805 | && !nfs_attribute_timeout(inode)) |
806 | return NFS_STALE(inode) ? -ESTALE : 0; | |
807 | return __nfs_revalidate_inode(server, inode); | |
808 | } | |
809 | ||
717d44e8 TM |
810 | static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
811 | { | |
812 | struct nfs_inode *nfsi = NFS_I(inode); | |
813 | ||
814 | if (mapping->nrpages != 0) { | |
815 | int ret = invalidate_inode_pages2(mapping); | |
816 | if (ret < 0) | |
817 | return ret; | |
818 | } | |
819 | spin_lock(&inode->i_lock); | |
820 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 821 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 822 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
823 | spin_unlock(&inode->i_lock); |
824 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 825 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
826 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
827 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
828 | return 0; | |
829 | } | |
830 | ||
831 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) | |
832 | { | |
833 | int ret = 0; | |
834 | ||
835 | mutex_lock(&inode->i_mutex); | |
836 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) { | |
837 | ret = nfs_sync_mapping(mapping); | |
838 | if (ret == 0) | |
839 | ret = nfs_invalidate_mapping_nolock(inode, mapping); | |
840 | } | |
841 | mutex_unlock(&inode->i_mutex); | |
842 | return ret; | |
843 | } | |
844 | ||
7d52e862 | 845 | /** |
717d44e8 | 846 | * nfs_revalidate_mapping_nolock - Revalidate the pagecache |
7d52e862 TM |
847 | * @inode - pointer to host inode |
848 | * @mapping - pointer to mapping | |
849 | */ | |
717d44e8 | 850 | int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
7d52e862 TM |
851 | { |
852 | struct nfs_inode *nfsi = NFS_I(inode); | |
44b11874 TM |
853 | int ret = 0; |
854 | ||
44b11874 | 855 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
717d44e8 | 856 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { |
44b11874 | 857 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
717d44e8 TM |
858 | if (ret < 0) |
859 | goto out; | |
860 | } | |
861 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
862 | ret = nfs_invalidate_mapping_nolock(inode, mapping); | |
863 | out: | |
864 | return ret; | |
865 | } | |
7d52e862 | 866 | |
717d44e8 TM |
867 | /** |
868 | * nfs_revalidate_mapping - Revalidate the pagecache | |
869 | * @inode - pointer to host inode | |
870 | * @mapping - pointer to mapping | |
871 | * | |
872 | * This version of the function will take the inode->i_mutex and attempt to | |
873 | * flush out all dirty data if it needs to invalidate the page cache. | |
874 | */ | |
875 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
876 | { | |
877 | struct nfs_inode *nfsi = NFS_I(inode); | |
878 | int ret = 0; | |
dc59250c | 879 | |
717d44e8 TM |
880 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
881 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { | |
882 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
883 | if (ret < 0) | |
884 | goto out; | |
7d52e862 | 885 | } |
717d44e8 TM |
886 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
887 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 888 | out: |
44b11874 | 889 | return ret; |
7d52e862 TM |
890 | } |
891 | ||
a895b4a1 TM |
892 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
893 | { | |
894 | struct nfs_inode *nfsi = NFS_I(inode); | |
895 | ||
9e6e70f8 TM |
896 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
897 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
898 | && nfsi->change_attr == fattr->pre_change_attr) { | |
70ca8852 TM |
899 | nfsi->change_attr = fattr->change_attr; |
900 | if (S_ISDIR(inode->i_mode)) | |
901 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
902 | } | |
a895b4a1 | 903 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
904 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
905 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
906 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) | |
a895b4a1 | 907 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
9e6e70f8 TM |
908 | |
909 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
910 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
911 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
a895b4a1 | 912 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
e323ea46 TM |
913 | if (S_ISDIR(inode->i_mode)) |
914 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
a895b4a1 | 915 | } |
9e6e70f8 TM |
916 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
917 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
918 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
919 | && nfsi->npages == 0) | |
920 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
a895b4a1 TM |
921 | } |
922 | ||
1da177e4 | 923 | /** |
33801147 | 924 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
925 | * @inode - pointer to inode |
926 | * @fattr - updated attributes | |
927 | * | |
928 | * Verifies the attribute cache. If we have just changed the attributes, | |
929 | * so that fattr carries weak cache consistency data, then it may | |
930 | * also update the ctime/mtime/change_attribute. | |
931 | */ | |
33801147 | 932 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
933 | { |
934 | struct nfs_inode *nfsi = NFS_I(inode); | |
935 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 936 | unsigned long invalid = 0; |
1da177e4 | 937 | |
dc59250c | 938 | |
ca62b9c3 | 939 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
940 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
941 | return -EIO; | |
942 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 943 | return -EIO; |
ca62b9c3 | 944 | |
9e6e70f8 | 945 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
f1bb0b92 | 946 | nfsi->change_attr != fattr->change_attr) |
2a3f5fd4 | 947 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 948 | |
1da177e4 | 949 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 950 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
2a3f5fd4 | 951 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
ca62b9c3 | 952 | |
9e6e70f8 TM |
953 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
954 | cur_size = i_size_read(inode); | |
955 | new_isize = nfs_size_to_loff_t(fattr->size); | |
956 | if (cur_size != new_isize && nfsi->npages == 0) | |
957 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
958 | } | |
1da177e4 LT |
959 | |
960 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
961 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
962 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
963 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
964 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
965 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 966 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
967 | |
968 | /* Has the link count changed? */ | |
9e6e70f8 | 969 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 970 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 971 | |
9e6e70f8 | 972 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
973 | invalid |= NFS_INO_INVALID_ATIME; |
974 | ||
975 | if (invalid != 0) | |
976 | nfsi->cache_validity |= invalid; | |
1da177e4 | 977 | |
33801147 | 978 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
979 | return 0; |
980 | } | |
981 | ||
a10ad176 | 982 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 983 | { |
9e6e70f8 TM |
984 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
985 | return 0; | |
a10ad176 TM |
986 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
987 | } | |
988 | ||
989 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
990 | { | |
9e6e70f8 TM |
991 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
992 | return 0; | |
a10ad176 TM |
993 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
994 | } | |
870a5be8 | 995 | |
ae05f269 | 996 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
997 | |
998 | static unsigned long nfs_read_attr_generation_counter(void) | |
999 | { | |
ae05f269 | 1000 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1001 | } |
1002 | ||
1003 | unsigned long nfs_inc_attr_generation_counter(void) | |
1004 | { | |
ae05f269 | 1005 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
1006 | } |
1007 | ||
1008 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1009 | { | |
1010 | fattr->valid = 0; | |
1011 | fattr->time_start = jiffies; | |
1012 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1013 | } | |
1014 | ||
a10ad176 TM |
1015 | /** |
1016 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1017 | * @inode - pointer to inode | |
1018 | * @fattr - attributes | |
1019 | * | |
1020 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1021 | * attributes got scheduled after another call carrying updated ones. | |
1022 | * | |
1023 | * To do so, the function first assumes that a more recent ctime means | |
1024 | * that the attributes in fattr are newer, however it also attempt to | |
1025 | * catch the case where ctime either didn't change, or went backwards | |
1026 | * (if someone reset the clock on the server) by looking at whether | |
1027 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1028 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1029 | * |
1030 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1031 | * more recent than the ones cached in the inode. | |
1032 | * | |
1033 | */ | |
1034 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1035 | { | |
1036 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1037 | ||
4704f0e2 | 1038 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1039 | nfs_ctime_need_update(inode, fattr) || |
1040 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1041 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1042 | } |
1043 | ||
1044 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1045 | { | |
1046 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1047 | return nfs_update_inode(inode, fattr); |
1048 | return nfs_check_inode_attributes(inode, fattr); | |
1049 | } | |
1050 | ||
33801147 TM |
1051 | /** |
1052 | * nfs_refresh_inode - try to update the inode attribute cache | |
1053 | * @inode - pointer to inode | |
1054 | * @fattr - updated attributes | |
1055 | * | |
1056 | * Check that an RPC call that returned attributes has not overlapped with | |
1057 | * other recent updates of the inode metadata, then decide whether it is | |
1058 | * safe to do a full update of the inode attributes, or whether just to | |
1059 | * call nfs_check_inode_attributes. | |
1060 | */ | |
1061 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1062 | { | |
33801147 TM |
1063 | int status; |
1064 | ||
1065 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1066 | return 0; | |
1067 | spin_lock(&inode->i_lock); | |
870a5be8 | 1068 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1069 | spin_unlock(&inode->i_lock); |
ef79c097 | 1070 | |
33801147 TM |
1071 | return status; |
1072 | } | |
1073 | ||
d65f557f TM |
1074 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1075 | { | |
1076 | struct nfs_inode *nfsi = NFS_I(inode); | |
1077 | ||
1078 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1079 | if (S_ISDIR(inode->i_mode)) | |
1080 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1081 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1082 | return 0; | |
1083 | return nfs_refresh_inode_locked(inode, fattr); | |
1084 | } | |
1085 | ||
decf491f TM |
1086 | /** |
1087 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1088 | * @inode - pointer to inode | |
1089 | * @fattr - updated attributes | |
1090 | * | |
1091 | * After an operation that has changed the inode metadata, mark the | |
1092 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1093 | * |
1094 | * NB: if the server didn't return any post op attributes, this | |
1095 | * function will force the retrieval of attributes before the next | |
1096 | * NFS request. Thus it should be used only for operations that | |
1097 | * are expected to change one or more attributes, to avoid | |
1098 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1099 | */ |
1100 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1101 | { | |
d65f557f | 1102 | int status; |
decf491f | 1103 | |
7668fdbe | 1104 | spin_lock(&inode->i_lock); |
d65f557f | 1105 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1106 | spin_unlock(&inode->i_lock); |
870a5be8 | 1107 | return status; |
decf491f TM |
1108 | } |
1109 | ||
70ca8852 TM |
1110 | /** |
1111 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1112 | * @inode - pointer to inode | |
1113 | * @fattr - updated attributes | |
1114 | * | |
1115 | * After an operation that has changed the inode metadata, mark the | |
1116 | * attribute cache as being invalid, then try to update it. Fake up | |
1117 | * weak cache consistency data, if none exist. | |
1118 | * | |
1119 | * This function is mainly designed to be used by the ->write_done() functions. | |
1120 | */ | |
1121 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1122 | { | |
d65f557f TM |
1123 | int status; |
1124 | ||
1125 | spin_lock(&inode->i_lock); | |
1126 | /* Don't do a WCC update if these attributes are already stale */ | |
1127 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1128 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1129 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1130 | | NFS_ATTR_FATTR_PRESIZE | |
1131 | | NFS_ATTR_FATTR_PREMTIME | |
1132 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1133 | goto out_noforce; |
1134 | } | |
9e6e70f8 TM |
1135 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1136 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
70ca8852 | 1137 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
9e6e70f8 | 1138 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1139 | } |
9e6e70f8 TM |
1140 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1141 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1142 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1143 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1144 | } | |
1145 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1146 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1147 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1148 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1149 | } | |
1150 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1151 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1152 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1153 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1154 | } |
d65f557f TM |
1155 | out_noforce: |
1156 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1157 | spin_unlock(&inode->i_lock); | |
1158 | return status; | |
70ca8852 TM |
1159 | } |
1160 | ||
1da177e4 LT |
1161 | /* |
1162 | * Many nfs protocol calls return the new file attributes after | |
1163 | * an operation. Here we update the inode to reflect the state | |
1164 | * of the server's inode. | |
1165 | * | |
1166 | * This is a bit tricky because we have to make sure all dirty pages | |
1167 | * have been sent off to the server before calling invalidate_inode_pages. | |
1168 | * To make sure no other process adds more write requests while we try | |
1169 | * our best to flush them, we make them sleep during the attribute refresh. | |
1170 | * | |
1171 | * A very similar scenario holds for the dir cache. | |
1172 | */ | |
24aa1fe6 | 1173 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1174 | { |
8b4bdcf8 | 1175 | struct nfs_server *server; |
1da177e4 | 1176 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1177 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1178 | unsigned long invalid = 0; |
3e7d950a | 1179 | unsigned long now = jiffies; |
62ab460c | 1180 | unsigned long save_cache_validity; |
1da177e4 LT |
1181 | |
1182 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
3110ff80 | 1183 | __func__, inode->i_sb->s_id, inode->i_ino, |
1da177e4 LT |
1184 | atomic_read(&inode->i_count), fattr->valid); |
1185 | ||
9e6e70f8 | 1186 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
325cfed9 | 1187 | goto out_fileid; |
1da177e4 LT |
1188 | |
1189 | /* | |
1190 | * Make sure the inode's type hasn't changed. | |
1191 | */ | |
9e6e70f8 | 1192 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1193 | goto out_changed; |
1194 | ||
8b4bdcf8 | 1195 | server = NFS_SERVER(inode); |
a0356862 | 1196 | /* Update the fsid? */ |
9e6e70f8 | 1197 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 TM |
1198 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
1199 | !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags)) | |
8b4bdcf8 TM |
1200 | server->fsid = fattr->fsid; |
1201 | ||
1da177e4 LT |
1202 | /* |
1203 | * Update the read time so we don't revalidate too often. | |
1204 | */ | |
33801147 | 1205 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1206 | |
62ab460c TM |
1207 | save_cache_validity = nfsi->cache_validity; |
1208 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1209 | | NFS_INO_INVALID_ATIME | |
1210 | | NFS_INO_REVAL_FORCED | |
1211 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1212 | |
a895b4a1 TM |
1213 | /* Do atomic weak cache consistency updates */ |
1214 | nfs_wcc_update_inode(inode, fattr); | |
1215 | ||
47aabaa7 | 1216 | /* More cache consistency checks */ |
9e6e70f8 TM |
1217 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
1218 | if (nfsi->change_attr != fattr->change_attr) { | |
1219 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
1220 | inode->i_sb->s_id, inode->i_ino); | |
1221 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1222 | if (S_ISDIR(inode->i_mode)) | |
1223 | nfs_force_lookup_revalidate(inode); | |
1224 | nfsi->change_attr = fattr->change_attr; | |
1225 | } | |
62ab460c TM |
1226 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1227 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1228 | |
1229 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
47aabaa7 TM |
1230 | /* NFSv2/v3: Check if the mtime agrees */ |
1231 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { | |
1232 | dprintk("NFS: mtime change on server for file %s/%ld\n", | |
1233 | inode->i_sb->s_id, inode->i_ino); | |
1234 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
bfc69a45 TM |
1235 | if (S_ISDIR(inode->i_mode)) |
1236 | nfs_force_lookup_revalidate(inode); | |
9e6e70f8 | 1237 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
47aabaa7 | 1238 | } |
62ab460c TM |
1239 | } else if (server->caps & NFS_CAP_MTIME) |
1240 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1241 | | NFS_INO_INVALID_DATA | |
1242 | | NFS_INO_REVAL_PAGECACHE | |
1243 | | NFS_INO_REVAL_FORCED); | |
1244 | ||
9e6e70f8 | 1245 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
47aabaa7 | 1246 | /* If ctime has changed we should definitely clear access+acl caches */ |
37d9d76d | 1247 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
4704f0e2 | 1248 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
37d9d76d N |
1249 | /* and probably clear data for a directory too as utimes can cause |
1250 | * havoc with our cache. | |
1251 | */ | |
1252 | if (S_ISDIR(inode->i_mode)) { | |
1253 | invalid |= NFS_INO_INVALID_DATA; | |
1254 | nfs_force_lookup_revalidate(inode); | |
1255 | } | |
9e6e70f8 | 1256 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
37d9d76d | 1257 | } |
62ab460c TM |
1258 | } else if (server->caps & NFS_CAP_CTIME) |
1259 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1260 | | NFS_INO_INVALID_ACCESS | |
1261 | | NFS_INO_INVALID_ACL | |
1262 | | NFS_INO_REVAL_FORCED); | |
47aabaa7 | 1263 | |
951a143b | 1264 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1265 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1266 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1267 | cur_isize = i_size_read(inode); | |
1268 | if (new_isize != cur_isize) { | |
1269 | /* Do we perhaps have any outstanding writes, or has | |
1270 | * the file grown beyond our last write? */ | |
1271 | if (nfsi->npages == 0 || new_isize > cur_isize) { | |
1272 | i_size_write(inode, new_isize); | |
1273 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1274 | } | |
1275 | dprintk("NFS: isize change on server for file %s/%ld\n", | |
1276 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 | 1277 | } |
62ab460c TM |
1278 | } else |
1279 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1280 | | NFS_INO_REVAL_PAGECACHE | |
1281 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1282 | |
1da177e4 | 1283 | |
9e6e70f8 TM |
1284 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1285 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1286 | else if (server->caps & NFS_CAP_ATIME) |
1287 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1288 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1289 | |
9e6e70f8 TM |
1290 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1291 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
1292 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1293 | inode->i_mode = fattr->mode; | |
1294 | } | |
62ab460c TM |
1295 | } else if (server->caps & NFS_CAP_MODE) |
1296 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1297 | | NFS_INO_INVALID_ACCESS | |
1298 | | NFS_INO_INVALID_ACL | |
1299 | | NFS_INO_REVAL_FORCED); | |
1300 | ||
9e6e70f8 TM |
1301 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1302 | if (inode->i_uid != fattr->uid) { | |
1303 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1304 | inode->i_uid = fattr->uid; | |
1305 | } | |
62ab460c TM |
1306 | } else if (server->caps & NFS_CAP_OWNER) |
1307 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1308 | | NFS_INO_INVALID_ACCESS | |
1309 | | NFS_INO_INVALID_ACL | |
1310 | | NFS_INO_REVAL_FORCED); | |
1311 | ||
9e6e70f8 TM |
1312 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1313 | if (inode->i_gid != fattr->gid) { | |
1314 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1315 | inode->i_gid = fattr->gid; | |
1316 | } | |
62ab460c TM |
1317 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1318 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1319 | | NFS_INO_INVALID_ACCESS | |
1320 | | NFS_INO_INVALID_ACL | |
1321 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1322 | |
9e6e70f8 TM |
1323 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1324 | if (inode->i_nlink != fattr->nlink) { | |
1325 | invalid |= NFS_INO_INVALID_ATTR; | |
1326 | if (S_ISDIR(inode->i_mode)) | |
1327 | invalid |= NFS_INO_INVALID_DATA; | |
1328 | inode->i_nlink = fattr->nlink; | |
1329 | } | |
62ab460c TM |
1330 | } else if (server->caps & NFS_CAP_NLINK) |
1331 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1332 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1333 | |
9e6e70f8 | 1334 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1335 | /* |
1336 | * report the blocks in 512byte units | |
1337 | */ | |
1338 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1339 | } |
9e6e70f8 TM |
1340 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1341 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1342 | |
1343 | /* Update attrtimeo value if we're out of the unstable period */ | |
1344 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1345 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1346 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1347 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1348 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1349 | } else { |
64672d55 | 1350 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1351 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1352 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1353 | nfsi->attrtimeo_timestamp = now; | |
1354 | } | |
1da177e4 | 1355 | } |
f2115dc9 | 1356 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1357 | /* Don't invalidate the data if we were to blame */ |
1358 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1359 | || S_ISLNK(inode->i_mode))) | |
1360 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce | 1361 | if (!nfs_have_delegation(inode, FMODE_READ) || |
62ab460c | 1362 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1363 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1364 | |
1365 | return 0; | |
1366 | out_changed: | |
1367 | /* | |
1368 | * Big trouble! The inode has become a different object. | |
1369 | */ | |
1da177e4 | 1370 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
3110ff80 | 1371 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
b37b03b7 | 1372 | out_err: |
1da177e4 LT |
1373 | /* |
1374 | * No need to worry about unhashing the dentry, as the | |
1375 | * lookup validation will know that the inode is bad. | |
1376 | * (But we fall through to invalidate the caches.) | |
1377 | */ | |
1378 | nfs_invalidate_inode(inode); | |
1da177e4 | 1379 | return -ESTALE; |
325cfed9 CL |
1380 | |
1381 | out_fileid: | |
1382 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1383 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
54ceac45 | 1384 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
325cfed9 CL |
1385 | (long long)nfsi->fileid, (long long)fattr->fileid); |
1386 | goto out_err; | |
1da177e4 LT |
1387 | } |
1388 | ||
55a97593 | 1389 | |
1da177e4 LT |
1390 | #ifdef CONFIG_NFS_V4 |
1391 | ||
1da177e4 LT |
1392 | /* |
1393 | * Clean out any remaining NFSv4 state that might be left over due | |
1394 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1395 | * nfs_open(). | |
1396 | */ | |
f7b422b1 | 1397 | void nfs4_clear_inode(struct inode *inode) |
1da177e4 | 1398 | { |
1da177e4 | 1399 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1400 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1401 | /* First call standard NFS clear_inode() code */ |
1402 | nfs_clear_inode(inode); | |
1da177e4 | 1403 | } |
1da177e4 LT |
1404 | #endif |
1405 | ||
f7b422b1 | 1406 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1407 | { |
1408 | struct nfs_inode *nfsi; | |
e94b1766 | 1409 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1410 | if (!nfsi) |
1411 | return NULL; | |
55296809 CL |
1412 | nfsi->flags = 0UL; |
1413 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1414 | #ifdef CONFIG_NFS_V3_ACL |
1415 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1416 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1417 | #endif | |
e50a1c2e BF |
1418 | #ifdef CONFIG_NFS_V4 |
1419 | nfsi->nfs4_acl = NULL; | |
1420 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1421 | return &nfsi->vfs_inode; |
1422 | } | |
1423 | ||
f7b422b1 | 1424 | void nfs_destroy_inode(struct inode *inode) |
1da177e4 LT |
1425 | { |
1426 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
1427 | } | |
1428 | ||
d75d5414 AM |
1429 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1430 | { | |
1431 | #ifdef CONFIG_NFS_V4 | |
1432 | INIT_LIST_HEAD(&nfsi->open_states); | |
1433 | nfsi->delegation = NULL; | |
1434 | nfsi->delegation_state = 0; | |
1435 | init_rwsem(&nfsi->rwsem); | |
1436 | #endif | |
1437 | } | |
f7b422b1 | 1438 | |
51cc5068 | 1439 | static void init_once(void *foo) |
1da177e4 LT |
1440 | { |
1441 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1442 | ||
a35afb83 | 1443 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1444 | INIT_LIST_HEAD(&nfsi->open_files); |
1445 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1446 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
1447 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
a35afb83 | 1448 | nfsi->npages = 0; |
565277f6 TM |
1449 | atomic_set(&nfsi->silly_count, 1); |
1450 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1451 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1452 | nfs4_init_once(nfsi); |
1da177e4 | 1453 | } |
20c2df83 | 1454 | |
f7b422b1 | 1455 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1456 | { |
1457 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1458 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1459 | 0, (SLAB_RECLAIM_ACCOUNT| |
1460 | SLAB_MEM_SPREAD), | |
20c2df83 | 1461 | init_once); |
1da177e4 LT |
1462 | if (nfs_inode_cachep == NULL) |
1463 | return -ENOMEM; | |
1464 | ||
1465 | return 0; | |
1466 | } | |
1467 | ||
266bee88 | 1468 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1469 | { |
1a1d92c1 | 1470 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1471 | } |
1472 | ||
5746006f TM |
1473 | struct workqueue_struct *nfsiod_workqueue; |
1474 | ||
1475 | /* | |
1476 | * start up the nfsiod workqueue | |
1477 | */ | |
1478 | static int nfsiod_start(void) | |
1479 | { | |
1480 | struct workqueue_struct *wq; | |
1481 | dprintk("RPC: creating workqueue nfsiod\n"); | |
1482 | wq = create_singlethread_workqueue("nfsiod"); | |
1483 | if (wq == NULL) | |
1484 | return -ENOMEM; | |
1485 | nfsiod_workqueue = wq; | |
1486 | return 0; | |
1487 | } | |
1488 | ||
1489 | /* | |
1490 | * Destroy the nfsiod workqueue | |
1491 | */ | |
1492 | static void nfsiod_stop(void) | |
1493 | { | |
1494 | struct workqueue_struct *wq; | |
1495 | ||
1496 | wq = nfsiod_workqueue; | |
1497 | if (wq == NULL) | |
1498 | return; | |
1499 | nfsiod_workqueue = NULL; | |
1500 | destroy_workqueue(wq); | |
1501 | } | |
1502 | ||
1da177e4 LT |
1503 | /* |
1504 | * Initialize NFS | |
1505 | */ | |
1506 | static int __init init_nfs_fs(void) | |
1507 | { | |
1508 | int err; | |
1509 | ||
e571cbf1 TM |
1510 | err = nfs_dns_resolver_init(); |
1511 | if (err < 0) | |
1512 | goto out8; | |
1513 | ||
8ec442ae DH |
1514 | err = nfs_fscache_register(); |
1515 | if (err < 0) | |
1516 | goto out7; | |
1517 | ||
5746006f TM |
1518 | err = nfsiod_start(); |
1519 | if (err) | |
1520 | goto out6; | |
1521 | ||
6aaca566 DH |
1522 | err = nfs_fs_proc_init(); |
1523 | if (err) | |
1524 | goto out5; | |
1525 | ||
1da177e4 LT |
1526 | err = nfs_init_nfspagecache(); |
1527 | if (err) | |
1528 | goto out4; | |
1529 | ||
1530 | err = nfs_init_inodecache(); | |
1531 | if (err) | |
1532 | goto out3; | |
1533 | ||
1534 | err = nfs_init_readpagecache(); | |
1535 | if (err) | |
1536 | goto out2; | |
1537 | ||
1538 | err = nfs_init_writepagecache(); | |
1539 | if (err) | |
1540 | goto out1; | |
1541 | ||
1da177e4 LT |
1542 | err = nfs_init_directcache(); |
1543 | if (err) | |
1544 | goto out0; | |
1da177e4 LT |
1545 | |
1546 | #ifdef CONFIG_PROC_FS | |
1547 | rpc_proc_register(&nfs_rpcstat); | |
1548 | #endif | |
f7b422b1 | 1549 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1550 | goto out; |
1551 | return 0; | |
1552 | out: | |
1553 | #ifdef CONFIG_PROC_FS | |
1554 | rpc_proc_unregister("nfs"); | |
1555 | #endif | |
1da177e4 | 1556 | nfs_destroy_directcache(); |
6b59a754 | 1557 | out0: |
6b59a754 | 1558 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1559 | out1: |
1560 | nfs_destroy_readpagecache(); | |
1561 | out2: | |
1562 | nfs_destroy_inodecache(); | |
1563 | out3: | |
1564 | nfs_destroy_nfspagecache(); | |
1565 | out4: | |
6aaca566 DH |
1566 | nfs_fs_proc_exit(); |
1567 | out5: | |
5746006f TM |
1568 | nfsiod_stop(); |
1569 | out6: | |
8ec442ae DH |
1570 | nfs_fscache_unregister(); |
1571 | out7: | |
e571cbf1 TM |
1572 | nfs_dns_resolver_destroy(); |
1573 | out8: | |
1da177e4 LT |
1574 | return err; |
1575 | } | |
1576 | ||
1577 | static void __exit exit_nfs_fs(void) | |
1578 | { | |
1da177e4 | 1579 | nfs_destroy_directcache(); |
1da177e4 LT |
1580 | nfs_destroy_writepagecache(); |
1581 | nfs_destroy_readpagecache(); | |
1582 | nfs_destroy_inodecache(); | |
1583 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1584 | nfs_fscache_unregister(); |
e571cbf1 | 1585 | nfs_dns_resolver_destroy(); |
1da177e4 LT |
1586 | #ifdef CONFIG_PROC_FS |
1587 | rpc_proc_unregister("nfs"); | |
1588 | #endif | |
f7b422b1 | 1589 | unregister_nfs_fs(); |
6aaca566 | 1590 | nfs_fs_proc_exit(); |
5746006f | 1591 | nfsiod_stop(); |
1da177e4 LT |
1592 | } |
1593 | ||
1594 | /* Not quite true; I just maintain it */ | |
1595 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1596 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1597 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1598 | |
1599 | module_init(init_nfs_fs) | |
1600 | module_exit(exit_nfs_fs) |