Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/inode.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs inode and superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
1da177e4 LT |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | */ | |
15 | ||
1da177e4 LT |
16 | #include <linux/module.h> |
17 | #include <linux/init.h> | |
e8edc6e0 | 18 | #include <linux/sched.h> |
1da177e4 LT |
19 | #include <linux/time.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/unistd.h> | |
26 | #include <linux/sunrpc/clnt.h> | |
27 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 28 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
29 | #include <linux/nfs_fs.h> |
30 | #include <linux/nfs_mount.h> | |
31 | #include <linux/nfs4_mount.h> | |
32 | #include <linux/lockd/bind.h> | |
1da177e4 LT |
33 | #include <linux/seq_file.h> |
34 | #include <linux/mount.h> | |
35 | #include <linux/nfs_idmap.h> | |
36 | #include <linux/vfs.h> | |
9cdb3883 MN |
37 | #include <linux/inet.h> |
38 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
1da177e4 LT |
40 | |
41 | #include <asm/system.h> | |
42 | #include <asm/uaccess.h> | |
43 | ||
4ce79717 | 44 | #include "nfs4_fs.h" |
a72b4422 | 45 | #include "callback.h" |
1da177e4 | 46 | #include "delegation.h" |
d9ef5a8c | 47 | #include "iostat.h" |
f7b422b1 | 48 | #include "internal.h" |
8ec442ae | 49 | #include "fscache.h" |
e571cbf1 | 50 | #include "dns_resolve.h" |
1da177e4 LT |
51 | |
52 | #define NFSDBG_FACILITY NFSDBG_VFS | |
1da177e4 | 53 | |
f43bf0be TM |
54 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
55 | ||
56 | /* Default is to see 64-bit inode numbers */ | |
57 | static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; | |
58 | ||
1da177e4 | 59 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 60 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 61 | |
e18b890b | 62 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 63 | |
1da177e4 LT |
64 | static inline unsigned long |
65 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
66 | { | |
67 | return nfs_fileid_to_ino_t(fattr->fileid); | |
68 | } | |
69 | ||
72cb77f4 TM |
70 | /** |
71 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
72 | * @word: long word containing the bit lock | |
73 | */ | |
74 | int nfs_wait_bit_killable(void *word) | |
75 | { | |
76 | if (fatal_signal_pending(current)) | |
77 | return -ERESTARTSYS; | |
78 | schedule(); | |
79 | return 0; | |
80 | } | |
81 | ||
f43bf0be TM |
82 | /** |
83 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
84 | * @fileid: 64-bit fileid | |
85 | * | |
86 | * This function returns a 32-bit inode number if the boot parameter | |
87 | * nfs.enable_ino64 is zero. | |
88 | */ | |
89 | u64 nfs_compat_user_ino64(u64 fileid) | |
90 | { | |
91 | int ino; | |
92 | ||
93 | if (enable_ino64) | |
94 | return fileid; | |
95 | ino = fileid; | |
96 | if (sizeof(ino) < sizeof(fileid)) | |
97 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
98 | return ino; | |
99 | } | |
100 | ||
f7b422b1 | 101 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 102 | { |
da6d503a TM |
103 | /* |
104 | * The following should never happen... | |
105 | */ | |
106 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 107 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 108 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 109 | nfs_access_zap_cache(inode); |
ef79c097 | 110 | nfs_fscache_release_inode_cookie(inode); |
1da177e4 LT |
111 | } |
112 | ||
29884df0 TM |
113 | /** |
114 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
115 | */ | |
116 | int nfs_sync_mapping(struct address_space *mapping) | |
117 | { | |
5cf95214 | 118 | int ret = 0; |
29884df0 | 119 | |
5cf95214 TM |
120 | if (mapping->nrpages != 0) { |
121 | unmap_mapping_range(mapping, 0, 0, 0); | |
122 | ret = nfs_wb_all(mapping->host); | |
123 | } | |
29884df0 TM |
124 | return ret; |
125 | } | |
126 | ||
1da177e4 LT |
127 | /* |
128 | * Invalidate the local caches | |
129 | */ | |
b37b03b7 | 130 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
131 | { |
132 | struct nfs_inode *nfsi = NFS_I(inode); | |
133 | int mode = inode->i_mode; | |
134 | ||
91d5b470 CL |
135 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
136 | ||
c7c20973 TM |
137 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
138 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 LT |
139 | |
140 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
141 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 142 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 143 | else |
55296809 | 144 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 145 | } |
dc59250c | 146 | |
b37b03b7 TM |
147 | void nfs_zap_caches(struct inode *inode) |
148 | { | |
149 | spin_lock(&inode->i_lock); | |
150 | nfs_zap_caches_locked(inode); | |
dc59250c | 151 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
152 | } |
153 | ||
cd9ae2b6 TM |
154 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
155 | { | |
156 | if (mapping->nrpages != 0) { | |
157 | spin_lock(&inode->i_lock); | |
158 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
159 | spin_unlock(&inode->i_lock); | |
160 | } | |
161 | } | |
162 | ||
f41f7418 | 163 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
164 | { |
165 | void (*clear_acl_cache)(struct inode *); | |
166 | ||
167 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
168 | if (clear_acl_cache != NULL) | |
169 | clear_acl_cache(inode); | |
dc59250c | 170 | spin_lock(&inode->i_lock); |
55296809 | 171 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 172 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
173 | } |
174 | ||
c4812998 TM |
175 | void nfs_invalidate_atime(struct inode *inode) |
176 | { | |
177 | spin_lock(&inode->i_lock); | |
178 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
179 | spin_unlock(&inode->i_lock); | |
180 | } | |
181 | ||
1da177e4 | 182 | /* |
b37b03b7 TM |
183 | * Invalidate, but do not unhash, the inode. |
184 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 185 | */ |
b37b03b7 | 186 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 187 | { |
3a10c30a | 188 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 189 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
190 | } |
191 | ||
192 | struct nfs_find_desc { | |
193 | struct nfs_fh *fh; | |
194 | struct nfs_fattr *fattr; | |
195 | }; | |
196 | ||
197 | /* | |
198 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
199 | * this, and re-exported directories (also seen in NFSv2) | |
200 | * we are forced to allow 2 different inodes to have the same | |
201 | * i_ino. | |
202 | */ | |
203 | static int | |
204 | nfs_find_actor(struct inode *inode, void *opaque) | |
205 | { | |
206 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
207 | struct nfs_fh *fh = desc->fh; | |
208 | struct nfs_fattr *fattr = desc->fattr; | |
209 | ||
210 | if (NFS_FILEID(inode) != fattr->fileid) | |
211 | return 0; | |
212 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
213 | return 0; | |
214 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
215 | return 0; | |
216 | return 1; | |
217 | } | |
218 | ||
219 | static int | |
220 | nfs_init_locked(struct inode *inode, void *opaque) | |
221 | { | |
222 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
223 | struct nfs_fattr *fattr = desc->fattr; | |
224 | ||
99fadcd7 | 225 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
226 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
227 | return 0; | |
228 | } | |
229 | ||
230 | /* Don't use READDIRPLUS on directories that we believe are too large */ | |
231 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) | |
232 | ||
233 | /* | |
234 | * This is our front-end to iget that looks up inodes by file handle | |
235 | * instead of inode number. | |
236 | */ | |
237 | struct inode * | |
238 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
239 | { | |
240 | struct nfs_find_desc desc = { | |
241 | .fh = fh, | |
242 | .fattr = fattr | |
243 | }; | |
03f28e3a | 244 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
245 | unsigned long hash; |
246 | ||
9e6e70f8 | 247 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) |
1da177e4 | 248 | goto out_no_inode; |
9e6e70f8 | 249 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 250 | goto out_no_inode; |
1da177e4 LT |
251 | |
252 | hash = nfs_fattr_to_ino_t(fattr); | |
253 | ||
03f28e3a TM |
254 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
255 | if (inode == NULL) { | |
256 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 257 | goto out_no_inode; |
03f28e3a | 258 | } |
1da177e4 LT |
259 | |
260 | if (inode->i_state & I_NEW) { | |
261 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 262 | unsigned long now = jiffies; |
1da177e4 LT |
263 | |
264 | /* We set i_ino for the few things that still rely on it, | |
265 | * such as stat(2) */ | |
266 | inode->i_ino = hash; | |
267 | ||
268 | /* We can't support update_atime(), since the server will reset it */ | |
269 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
270 | inode->i_mode = fattr->mode; | |
62ab460c TM |
271 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
272 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
273 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
274 | | NFS_INO_INVALID_ACCESS | |
275 | | NFS_INO_INVALID_ACL; | |
1da177e4 LT |
276 | /* Why so? Because we want revalidate for devices/FIFOs, and |
277 | * that's precisely what we have in nfs_file_inode_operations. | |
278 | */ | |
8fa5c000 | 279 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 LT |
280 | if (S_ISREG(inode->i_mode)) { |
281 | inode->i_fop = &nfs_file_operations; | |
282 | inode->i_data.a_ops = &nfs_file_aops; | |
283 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
284 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 285 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 LT |
286 | inode->i_fop = &nfs_dir_operations; |
287 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) | |
288 | && fattr->size <= NFS_LIMIT_READDIRPLUS) | |
3a10c30a | 289 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
55a97593 | 290 | /* Deal with crossing mountpoints */ |
9e6e70f8 TM |
291 | if ((fattr->valid & NFS_ATTR_FATTR_FSID) |
292 | && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { | |
6b97fd3d MN |
293 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
294 | inode->i_op = &nfs_referral_inode_operations; | |
295 | else | |
296 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 297 | inode->i_fop = NULL; |
c37dcd33 | 298 | set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags); |
55a97593 | 299 | } |
1da177e4 LT |
300 | } else if (S_ISLNK(inode->i_mode)) |
301 | inode->i_op = &nfs_symlink_inode_operations; | |
302 | else | |
303 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
304 | ||
9e6e70f8 TM |
305 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
306 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
307 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
308 | nfsi->change_attr = 0; | |
309 | inode->i_size = 0; | |
310 | inode->i_nlink = 0; | |
311 | inode->i_uid = -2; | |
312 | inode->i_gid = -2; | |
313 | inode->i_blocks = 0; | |
314 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
315 | ||
33801147 | 316 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 317 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
318 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
319 | inode->i_atime = fattr->atime; | |
62ab460c TM |
320 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
321 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
322 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
323 | inode->i_mtime = fattr->mtime; | |
62ab460c TM |
324 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
325 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
326 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
327 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
328 | inode->i_ctime = fattr->ctime; | |
62ab460c TM |
329 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
330 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
331 | | NFS_INO_INVALID_ACCESS | |
332 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 | 333 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
1da177e4 | 334 | nfsi->change_attr = fattr->change_attr; |
62ab460c TM |
335 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
336 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
337 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
338 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
339 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
340 | else |
341 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
342 | | NFS_INO_INVALID_DATA | |
343 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
344 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
345 | inode->i_nlink = fattr->nlink; | |
62ab460c TM |
346 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
347 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
348 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
349 | inode->i_uid = fattr->uid; | |
62ab460c TM |
350 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
351 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
352 | | NFS_INO_INVALID_ACCESS | |
353 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
354 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
355 | inode->i_gid = fattr->gid; | |
62ab460c TM |
356 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
357 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
358 | | NFS_INO_INVALID_ACCESS | |
359 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
360 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
361 | inode->i_blocks = fattr->du.nfs2.blocks; | |
362 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
363 | /* |
364 | * report the blocks in 512byte units | |
365 | */ | |
366 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
367 | } |
368 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 369 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 370 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 371 | |
ef79c097 DH |
372 | nfs_fscache_init_inode_cookie(inode); |
373 | ||
1da177e4 LT |
374 | unlock_new_inode(inode); |
375 | } else | |
376 | nfs_refresh_inode(inode, fattr); | |
377 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
378 | inode->i_sb->s_id, | |
379 | (long long)NFS_FILEID(inode), | |
380 | atomic_read(&inode->i_count)); | |
381 | ||
382 | out: | |
383 | return inode; | |
384 | ||
385 | out_no_inode: | |
03f28e3a | 386 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
387 | goto out; |
388 | } | |
389 | ||
659bfcd6 | 390 | #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 |
391 | |
392 | int | |
393 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
394 | { | |
395 | struct inode *inode = dentry->d_inode; | |
396 | struct nfs_fattr fattr; | |
397 | int error; | |
398 | ||
91d5b470 CL |
399 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
400 | ||
188b95dd JL |
401 | /* skip mode change if it's just for clearing setuid/setgid */ |
402 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
403 | attr->ia_valid &= ~ATTR_MODE; | |
404 | ||
1da177e4 LT |
405 | if (attr->ia_valid & ATTR_SIZE) { |
406 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
407 | attr->ia_valid &= ~ATTR_SIZE; | |
408 | } | |
409 | ||
410 | /* Optimization: if the end result is no change, don't RPC */ | |
411 | attr->ia_valid &= NFS_VALID_ATTRS; | |
659bfcd6 | 412 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
1da177e4 LT |
413 | return 0; |
414 | ||
755c1e20 | 415 | /* Write all dirty data */ |
e1552e19 TM |
416 | if (S_ISREG(inode->i_mode)) { |
417 | filemap_write_and_wait(inode->i_mapping); | |
418 | nfs_wb_all(inode); | |
419 | } | |
642ac549 TM |
420 | /* |
421 | * Return any delegations if we're going to change ACLs | |
422 | */ | |
423 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
424 | nfs_inode_return_delegation(inode); | |
1da177e4 | 425 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
65e4308d | 426 | if (error == 0) |
1da177e4 | 427 | nfs_refresh_inode(inode, &fattr); |
65e4308d TM |
428 | return error; |
429 | } | |
430 | ||
a3d01454 TM |
431 | /** |
432 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
433 | * @inode: inode of the file used | |
434 | * @offset: file offset to start truncating | |
435 | * | |
436 | * This is a copy of the common vmtruncate, but with the locking | |
437 | * corrected to take into account the fact that NFS requires | |
438 | * inode->i_size to be updated under the inode->i_lock. | |
439 | */ | |
440 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
441 | { | |
c08d3b0e | 442 | loff_t oldsize; |
443 | int err; | |
a3d01454 | 444 | |
c08d3b0e | 445 | err = inode_newsize_ok(inode, offset); |
446 | if (err) | |
447 | goto out; | |
a3d01454 | 448 | |
c08d3b0e | 449 | spin_lock(&inode->i_lock); |
450 | oldsize = inode->i_size; | |
451 | i_size_write(inode, offset); | |
452 | spin_unlock(&inode->i_lock); | |
453 | ||
454 | truncate_pagecache(inode, oldsize, offset); | |
455 | out: | |
456 | return err; | |
a3d01454 TM |
457 | } |
458 | ||
65e4308d TM |
459 | /** |
460 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
461 | * @inode: pointer to struct inode | |
462 | * @attr: pointer to struct iattr | |
463 | * | |
464 | * Note: we do this in the *proc.c in order to ensure that | |
465 | * it works for things like exclusive creates too. | |
466 | */ | |
467 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
468 | { | |
469 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 470 | spin_lock(&inode->i_lock); |
1da177e4 | 471 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
472 | int mode = attr->ia_mode & S_IALLUGO; |
473 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
474 | inode->i_mode = mode; |
475 | } | |
476 | if ((attr->ia_valid & ATTR_UID) != 0) | |
477 | inode->i_uid = attr->ia_uid; | |
478 | if ((attr->ia_valid & ATTR_GID) != 0) | |
479 | inode->i_gid = attr->ia_gid; | |
55296809 | 480 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 481 | spin_unlock(&inode->i_lock); |
65e4308d TM |
482 | } |
483 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 484 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 485 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 486 | } |
1da177e4 LT |
487 | } |
488 | ||
1da177e4 LT |
489 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
490 | { | |
491 | struct inode *inode = dentry->d_inode; | |
55296809 | 492 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
493 | int err; |
494 | ||
acdc53b2 | 495 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 496 | if (S_ISREG(inode->i_mode)) { |
acdc53b2 TM |
497 | err = filemap_write_and_wait(inode->i_mapping); |
498 | if (err) | |
499 | goto out; | |
28c494c5 | 500 | } |
fc33a7bb CH |
501 | |
502 | /* | |
503 | * We may force a getattr if the user cares about atime. | |
504 | * | |
505 | * Note that we only have to check the vfsmount flags here: | |
506 | * - NFS always sets S_NOATIME by so checking it would give a | |
507 | * bogus result | |
508 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
509 | * no point in checking those. | |
510 | */ | |
511 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
512 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 513 | need_atime = 0; |
fc33a7bb | 514 | |
1da177e4 LT |
515 | if (need_atime) |
516 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
517 | else | |
518 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 519 | if (!err) { |
1da177e4 | 520 | generic_fillattr(inode, stat); |
f43bf0be | 521 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 522 | } |
acdc53b2 | 523 | out: |
1da177e4 LT |
524 | return err; |
525 | } | |
526 | ||
7fe5c398 TM |
527 | /** |
528 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
529 | * @ctx: pointer to context | |
530 | * @is_sync: is this a synchronous close | |
531 | * | |
532 | * always ensure that the attributes are up to date if we're mounted | |
533 | * with close-to-open semantics | |
534 | */ | |
535 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
536 | { | |
537 | struct inode *inode; | |
538 | struct nfs_server *server; | |
539 | ||
540 | if (!(ctx->mode & FMODE_WRITE)) | |
541 | return; | |
542 | if (!is_sync) | |
543 | return; | |
544 | inode = ctx->path.dentry->d_inode; | |
545 | if (!list_empty(&NFS_I(inode)->open_files)) | |
546 | return; | |
547 | server = NFS_SERVER(inode); | |
548 | if (server->flags & NFS_MOUNT_NOCTO) | |
549 | return; | |
550 | nfs_revalidate_inode(server, inode); | |
551 | } | |
552 | ||
6eae7974 | 553 | static struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred) |
1da177e4 LT |
554 | { |
555 | struct nfs_open_context *ctx; | |
556 | ||
f52720ca | 557 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
1da177e4 | 558 | if (ctx != NULL) { |
6eae7974 AV |
559 | ctx->path = *path; |
560 | path_get(&ctx->path); | |
1da177e4 LT |
561 | ctx->cred = get_rpccred(cred); |
562 | ctx->state = NULL; | |
563 | ctx->lockowner = current->files; | |
66d3aac0 | 564 | ctx->flags = 0; |
1da177e4 | 565 | ctx->error = 0; |
00a92642 | 566 | ctx->dir_cookie = 0; |
5e11934d | 567 | atomic_set(&ctx->count, 1); |
1da177e4 LT |
568 | } |
569 | return ctx; | |
570 | } | |
571 | ||
572 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
573 | { | |
574 | if (ctx != NULL) | |
5e11934d | 575 | atomic_inc(&ctx->count); |
1da177e4 LT |
576 | return ctx; |
577 | } | |
578 | ||
7fe5c398 | 579 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 580 | { |
7fe5c398 | 581 | struct inode *inode = ctx->path.dentry->d_inode; |
3bec63db | 582 | |
5e11934d TM |
583 | if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock)) |
584 | return; | |
585 | list_del(&ctx->list); | |
586 | spin_unlock(&inode->i_lock); | |
7fe5c398 | 587 | NFS_PROTO(inode)->close_context(ctx, is_sync); |
3bec63db TM |
588 | if (ctx->cred != NULL) |
589 | put_rpccred(ctx->cred); | |
31f31db1 | 590 | path_put(&ctx->path); |
3bec63db TM |
591 | kfree(ctx); |
592 | } | |
593 | ||
a49c3c77 TM |
594 | void put_nfs_open_context(struct nfs_open_context *ctx) |
595 | { | |
596 | __put_nfs_open_context(ctx, 0); | |
597 | } | |
598 | ||
1da177e4 LT |
599 | /* |
600 | * Ensure that mmap has a recent RPC credential for use when writing out | |
601 | * shared pages | |
602 | */ | |
b92dccf6 | 603 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 604 | { |
01cce933 | 605 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
606 | struct nfs_inode *nfsi = NFS_I(inode); |
607 | ||
608 | filp->private_data = get_nfs_open_context(ctx); | |
609 | spin_lock(&inode->i_lock); | |
610 | list_add(&ctx->list, &nfsi->open_files); | |
611 | spin_unlock(&inode->i_lock); | |
612 | } | |
613 | ||
d530838b TM |
614 | /* |
615 | * Given an inode, search for an open context with the desired characteristics | |
616 | */ | |
dc0b027d | 617 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
618 | { |
619 | struct nfs_inode *nfsi = NFS_I(inode); | |
620 | struct nfs_open_context *pos, *ctx = NULL; | |
621 | ||
622 | spin_lock(&inode->i_lock); | |
623 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
624 | if (cred != NULL && pos->cred != cred) |
625 | continue; | |
1544fa0f TM |
626 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
627 | continue; | |
628 | ctx = get_nfs_open_context(pos); | |
629 | break; | |
1da177e4 LT |
630 | } |
631 | spin_unlock(&inode->i_lock); | |
632 | return ctx; | |
633 | } | |
634 | ||
b92dccf6 | 635 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 636 | { |
01cce933 | 637 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 638 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
639 | |
640 | if (ctx) { | |
641 | filp->private_data = NULL; | |
642 | spin_lock(&inode->i_lock); | |
643 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
644 | spin_unlock(&inode->i_lock); | |
f895c53f | 645 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
646 | } |
647 | } | |
648 | ||
649 | /* | |
650 | * These allocate and release file read/write context information. | |
651 | */ | |
652 | int nfs_open(struct inode *inode, struct file *filp) | |
653 | { | |
654 | struct nfs_open_context *ctx; | |
655 | struct rpc_cred *cred; | |
656 | ||
98a8e323 | 657 | cred = rpc_lookup_cred(); |
1da177e4 LT |
658 | if (IS_ERR(cred)) |
659 | return PTR_ERR(cred); | |
6eae7974 | 660 | ctx = alloc_nfs_open_context(&filp->f_path, cred); |
1da177e4 LT |
661 | put_rpccred(cred); |
662 | if (ctx == NULL) | |
663 | return -ENOMEM; | |
664 | ctx->mode = filp->f_mode; | |
665 | nfs_file_set_open_context(filp, ctx); | |
666 | put_nfs_open_context(ctx); | |
ef79c097 | 667 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
668 | return 0; |
669 | } | |
670 | ||
671 | int nfs_release(struct inode *inode, struct file *filp) | |
672 | { | |
1da177e4 LT |
673 | nfs_file_clear_open_context(filp); |
674 | return 0; | |
675 | } | |
676 | ||
677 | /* | |
678 | * This function is called whenever some part of NFS notices that | |
679 | * the cached attributes have to be refreshed. | |
680 | */ | |
681 | int | |
682 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
683 | { | |
684 | int status = -ESTALE; | |
685 | struct nfs_fattr fattr; | |
686 | struct nfs_inode *nfsi = NFS_I(inode); | |
1da177e4 LT |
687 | |
688 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
689 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
690 | ||
85233a7a | 691 | if (is_bad_inode(inode)) |
691beb13 | 692 | goto out; |
1da177e4 | 693 | if (NFS_STALE(inode)) |
412d582e | 694 | goto out; |
7fdc49c4 | 695 | |
691beb13 | 696 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
1da177e4 LT |
697 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
698 | if (status != 0) { | |
699 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
700 | inode->i_sb->s_id, | |
701 | (long long)NFS_FILEID(inode), status); | |
702 | if (status == -ESTALE) { | |
703 | nfs_zap_caches(inode); | |
704 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 705 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
706 | } |
707 | goto out; | |
708 | } | |
709 | ||
4dc05efb | 710 | status = nfs_refresh_inode(inode, &fattr); |
1da177e4 LT |
711 | if (status) { |
712 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
713 | inode->i_sb->s_id, | |
714 | (long long)NFS_FILEID(inode), status); | |
715 | goto out; | |
716 | } | |
55296809 | 717 | |
24aa1fe6 | 718 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 719 | nfs_zap_acl_cache(inode); |
55296809 | 720 | |
1da177e4 LT |
721 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
722 | inode->i_sb->s_id, | |
723 | (long long)NFS_FILEID(inode)); | |
724 | ||
412d582e | 725 | out: |
1da177e4 LT |
726 | return status; |
727 | } | |
728 | ||
729 | int nfs_attribute_timeout(struct inode *inode) | |
730 | { | |
731 | struct nfs_inode *nfsi = NFS_I(inode); | |
732 | ||
b4d2314b | 733 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 734 | return 0; |
64672d55 | 735 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
1da177e4 LT |
736 | } |
737 | ||
738 | /** | |
739 | * nfs_revalidate_inode - Revalidate the inode attributes | |
740 | * @server - pointer to nfs_server struct | |
741 | * @inode - pointer to inode struct | |
742 | * | |
743 | * Updates inode attribute information by retrieving the data from the server. | |
744 | */ | |
745 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
746 | { | |
44b11874 | 747 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
1da177e4 LT |
748 | && !nfs_attribute_timeout(inode)) |
749 | return NFS_STALE(inode) ? -ESTALE : 0; | |
750 | return __nfs_revalidate_inode(server, inode); | |
751 | } | |
752 | ||
1cda707d | 753 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
754 | { |
755 | struct nfs_inode *nfsi = NFS_I(inode); | |
756 | ||
757 | if (mapping->nrpages != 0) { | |
758 | int ret = invalidate_inode_pages2(mapping); | |
759 | if (ret < 0) | |
760 | return ret; | |
761 | } | |
762 | spin_lock(&inode->i_lock); | |
763 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 764 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 765 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
766 | spin_unlock(&inode->i_lock); |
767 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 768 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
769 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
770 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
771 | return 0; | |
772 | } | |
773 | ||
717d44e8 TM |
774 | /** |
775 | * nfs_revalidate_mapping - Revalidate the pagecache | |
776 | * @inode - pointer to host inode | |
777 | * @mapping - pointer to mapping | |
717d44e8 TM |
778 | */ |
779 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
780 | { | |
781 | struct nfs_inode *nfsi = NFS_I(inode); | |
782 | int ret = 0; | |
dc59250c | 783 | |
717d44e8 TM |
784 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
785 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { | |
786 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
787 | if (ret < 0) | |
788 | goto out; | |
7d52e862 | 789 | } |
717d44e8 TM |
790 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
791 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 792 | out: |
44b11874 | 793 | return ret; |
7d52e862 TM |
794 | } |
795 | ||
a895b4a1 TM |
796 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
797 | { | |
798 | struct nfs_inode *nfsi = NFS_I(inode); | |
799 | ||
9e6e70f8 TM |
800 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
801 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
802 | && nfsi->change_attr == fattr->pre_change_attr) { | |
70ca8852 TM |
803 | nfsi->change_attr = fattr->change_attr; |
804 | if (S_ISDIR(inode->i_mode)) | |
805 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
806 | } | |
a895b4a1 | 807 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
808 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
809 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
810 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) | |
a895b4a1 | 811 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
9e6e70f8 TM |
812 | |
813 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
814 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
815 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
a895b4a1 | 816 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
e323ea46 TM |
817 | if (S_ISDIR(inode->i_mode)) |
818 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
a895b4a1 | 819 | } |
9e6e70f8 TM |
820 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
821 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
822 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
823 | && nfsi->npages == 0) | |
824 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
a895b4a1 TM |
825 | } |
826 | ||
1da177e4 | 827 | /** |
33801147 | 828 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
829 | * @inode - pointer to inode |
830 | * @fattr - updated attributes | |
831 | * | |
832 | * Verifies the attribute cache. If we have just changed the attributes, | |
833 | * so that fattr carries weak cache consistency data, then it may | |
834 | * also update the ctime/mtime/change_attribute. | |
835 | */ | |
33801147 | 836 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
837 | { |
838 | struct nfs_inode *nfsi = NFS_I(inode); | |
839 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 840 | unsigned long invalid = 0; |
1da177e4 | 841 | |
dc59250c | 842 | |
ca62b9c3 | 843 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
844 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
845 | return -EIO; | |
846 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 847 | return -EIO; |
ca62b9c3 | 848 | |
9e6e70f8 | 849 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
f1bb0b92 | 850 | nfsi->change_attr != fattr->change_attr) |
2a3f5fd4 | 851 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 852 | |
1da177e4 | 853 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 854 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
2a3f5fd4 | 855 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
ca62b9c3 | 856 | |
9e6e70f8 TM |
857 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
858 | cur_size = i_size_read(inode); | |
859 | new_isize = nfs_size_to_loff_t(fattr->size); | |
860 | if (cur_size != new_isize && nfsi->npages == 0) | |
861 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
862 | } | |
1da177e4 LT |
863 | |
864 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
865 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
866 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
867 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
868 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
869 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 870 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
871 | |
872 | /* Has the link count changed? */ | |
9e6e70f8 | 873 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 874 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 875 | |
9e6e70f8 | 876 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
877 | invalid |= NFS_INO_INVALID_ATIME; |
878 | ||
879 | if (invalid != 0) | |
880 | nfsi->cache_validity |= invalid; | |
1da177e4 | 881 | |
33801147 | 882 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
883 | return 0; |
884 | } | |
885 | ||
a10ad176 | 886 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 887 | { |
9e6e70f8 TM |
888 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
889 | return 0; | |
a10ad176 TM |
890 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
891 | } | |
892 | ||
893 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
894 | { | |
9e6e70f8 TM |
895 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
896 | return 0; | |
a10ad176 TM |
897 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
898 | } | |
870a5be8 | 899 | |
ae05f269 | 900 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
901 | |
902 | static unsigned long nfs_read_attr_generation_counter(void) | |
903 | { | |
ae05f269 | 904 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
905 | } |
906 | ||
907 | unsigned long nfs_inc_attr_generation_counter(void) | |
908 | { | |
ae05f269 | 909 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
910 | } |
911 | ||
912 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
913 | { | |
914 | fattr->valid = 0; | |
915 | fattr->time_start = jiffies; | |
916 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
917 | } | |
918 | ||
2d36bfde TM |
919 | struct nfs_fattr *nfs_alloc_fattr(void) |
920 | { | |
921 | struct nfs_fattr *fattr; | |
922 | ||
923 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
924 | if (fattr != NULL) | |
925 | nfs_fattr_init(fattr); | |
926 | return fattr; | |
927 | } | |
928 | ||
929 | struct nfs_fh *nfs_alloc_fhandle(void) | |
930 | { | |
931 | struct nfs_fh *fh; | |
932 | ||
933 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
934 | if (fh != NULL) | |
935 | fh->size = 0; | |
936 | return fh; | |
937 | } | |
938 | ||
a10ad176 TM |
939 | /** |
940 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
941 | * @inode - pointer to inode | |
942 | * @fattr - attributes | |
943 | * | |
944 | * Attempt to divine whether or not an RPC call reply carrying stale | |
945 | * attributes got scheduled after another call carrying updated ones. | |
946 | * | |
947 | * To do so, the function first assumes that a more recent ctime means | |
948 | * that the attributes in fattr are newer, however it also attempt to | |
949 | * catch the case where ctime either didn't change, or went backwards | |
950 | * (if someone reset the clock on the server) by looking at whether | |
951 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 952 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
953 | * |
954 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
955 | * more recent than the ones cached in the inode. | |
956 | * | |
957 | */ | |
958 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
959 | { | |
960 | const struct nfs_inode *nfsi = NFS_I(inode); | |
961 | ||
4704f0e2 | 962 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
963 | nfs_ctime_need_update(inode, fattr) || |
964 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 965 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
966 | } |
967 | ||
968 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
969 | { | |
970 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
971 | return nfs_update_inode(inode, fattr); |
972 | return nfs_check_inode_attributes(inode, fattr); | |
973 | } | |
974 | ||
33801147 TM |
975 | /** |
976 | * nfs_refresh_inode - try to update the inode attribute cache | |
977 | * @inode - pointer to inode | |
978 | * @fattr - updated attributes | |
979 | * | |
980 | * Check that an RPC call that returned attributes has not overlapped with | |
981 | * other recent updates of the inode metadata, then decide whether it is | |
982 | * safe to do a full update of the inode attributes, or whether just to | |
983 | * call nfs_check_inode_attributes. | |
984 | */ | |
985 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
986 | { | |
33801147 TM |
987 | int status; |
988 | ||
989 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
990 | return 0; | |
991 | spin_lock(&inode->i_lock); | |
870a5be8 | 992 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 993 | spin_unlock(&inode->i_lock); |
ef79c097 | 994 | |
33801147 TM |
995 | return status; |
996 | } | |
997 | ||
d65f557f TM |
998 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
999 | { | |
1000 | struct nfs_inode *nfsi = NFS_I(inode); | |
1001 | ||
1002 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1003 | if (S_ISDIR(inode->i_mode)) | |
1004 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1005 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1006 | return 0; | |
1007 | return nfs_refresh_inode_locked(inode, fattr); | |
1008 | } | |
1009 | ||
decf491f TM |
1010 | /** |
1011 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1012 | * @inode - pointer to inode | |
1013 | * @fattr - updated attributes | |
1014 | * | |
1015 | * After an operation that has changed the inode metadata, mark the | |
1016 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1017 | * |
1018 | * NB: if the server didn't return any post op attributes, this | |
1019 | * function will force the retrieval of attributes before the next | |
1020 | * NFS request. Thus it should be used only for operations that | |
1021 | * are expected to change one or more attributes, to avoid | |
1022 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1023 | */ |
1024 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1025 | { | |
d65f557f | 1026 | int status; |
decf491f | 1027 | |
7668fdbe | 1028 | spin_lock(&inode->i_lock); |
d65f557f | 1029 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1030 | spin_unlock(&inode->i_lock); |
870a5be8 | 1031 | return status; |
decf491f TM |
1032 | } |
1033 | ||
70ca8852 TM |
1034 | /** |
1035 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1036 | * @inode - pointer to inode | |
1037 | * @fattr - updated attributes | |
1038 | * | |
1039 | * After an operation that has changed the inode metadata, mark the | |
1040 | * attribute cache as being invalid, then try to update it. Fake up | |
1041 | * weak cache consistency data, if none exist. | |
1042 | * | |
1043 | * This function is mainly designed to be used by the ->write_done() functions. | |
1044 | */ | |
1045 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1046 | { | |
d65f557f TM |
1047 | int status; |
1048 | ||
1049 | spin_lock(&inode->i_lock); | |
1050 | /* Don't do a WCC update if these attributes are already stale */ | |
1051 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1052 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1053 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1054 | | NFS_ATTR_FATTR_PRESIZE | |
1055 | | NFS_ATTR_FATTR_PREMTIME | |
1056 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1057 | goto out_noforce; |
1058 | } | |
9e6e70f8 TM |
1059 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1060 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
70ca8852 | 1061 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
9e6e70f8 | 1062 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1063 | } |
9e6e70f8 TM |
1064 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1065 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1066 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1067 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1068 | } | |
1069 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1070 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1071 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1072 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1073 | } | |
1074 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1075 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1076 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1077 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1078 | } |
d65f557f TM |
1079 | out_noforce: |
1080 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1081 | spin_unlock(&inode->i_lock); | |
1082 | return status; | |
70ca8852 TM |
1083 | } |
1084 | ||
1da177e4 LT |
1085 | /* |
1086 | * Many nfs protocol calls return the new file attributes after | |
1087 | * an operation. Here we update the inode to reflect the state | |
1088 | * of the server's inode. | |
1089 | * | |
1090 | * This is a bit tricky because we have to make sure all dirty pages | |
1091 | * have been sent off to the server before calling invalidate_inode_pages. | |
1092 | * To make sure no other process adds more write requests while we try | |
1093 | * our best to flush them, we make them sleep during the attribute refresh. | |
1094 | * | |
1095 | * A very similar scenario holds for the dir cache. | |
1096 | */ | |
24aa1fe6 | 1097 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1098 | { |
8b4bdcf8 | 1099 | struct nfs_server *server; |
1da177e4 | 1100 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1101 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1102 | unsigned long invalid = 0; |
3e7d950a | 1103 | unsigned long now = jiffies; |
62ab460c | 1104 | unsigned long save_cache_validity; |
1da177e4 LT |
1105 | |
1106 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
3110ff80 | 1107 | __func__, inode->i_sb->s_id, inode->i_ino, |
1da177e4 LT |
1108 | atomic_read(&inode->i_count), fattr->valid); |
1109 | ||
9e6e70f8 | 1110 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
325cfed9 | 1111 | goto out_fileid; |
1da177e4 LT |
1112 | |
1113 | /* | |
1114 | * Make sure the inode's type hasn't changed. | |
1115 | */ | |
9e6e70f8 | 1116 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1117 | goto out_changed; |
1118 | ||
8b4bdcf8 | 1119 | server = NFS_SERVER(inode); |
a0356862 | 1120 | /* Update the fsid? */ |
9e6e70f8 | 1121 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 TM |
1122 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
1123 | !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags)) | |
8b4bdcf8 TM |
1124 | server->fsid = fattr->fsid; |
1125 | ||
1da177e4 LT |
1126 | /* |
1127 | * Update the read time so we don't revalidate too often. | |
1128 | */ | |
33801147 | 1129 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1130 | |
62ab460c TM |
1131 | save_cache_validity = nfsi->cache_validity; |
1132 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1133 | | NFS_INO_INVALID_ATIME | |
1134 | | NFS_INO_REVAL_FORCED | |
1135 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1136 | |
a895b4a1 TM |
1137 | /* Do atomic weak cache consistency updates */ |
1138 | nfs_wcc_update_inode(inode, fattr); | |
1139 | ||
47aabaa7 | 1140 | /* More cache consistency checks */ |
9e6e70f8 TM |
1141 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
1142 | if (nfsi->change_attr != fattr->change_attr) { | |
1143 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
1144 | inode->i_sb->s_id, inode->i_ino); | |
1145 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1146 | if (S_ISDIR(inode->i_mode)) | |
1147 | nfs_force_lookup_revalidate(inode); | |
1148 | nfsi->change_attr = fattr->change_attr; | |
1149 | } | |
62ab460c TM |
1150 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1151 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1152 | |
1153 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
47aabaa7 TM |
1154 | /* NFSv2/v3: Check if the mtime agrees */ |
1155 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { | |
1156 | dprintk("NFS: mtime change on server for file %s/%ld\n", | |
1157 | inode->i_sb->s_id, inode->i_ino); | |
1158 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
bfc69a45 TM |
1159 | if (S_ISDIR(inode->i_mode)) |
1160 | nfs_force_lookup_revalidate(inode); | |
9e6e70f8 | 1161 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
47aabaa7 | 1162 | } |
62ab460c TM |
1163 | } else if (server->caps & NFS_CAP_MTIME) |
1164 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1165 | | NFS_INO_INVALID_DATA | |
1166 | | NFS_INO_REVAL_PAGECACHE | |
1167 | | NFS_INO_REVAL_FORCED); | |
1168 | ||
9e6e70f8 | 1169 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
47aabaa7 | 1170 | /* If ctime has changed we should definitely clear access+acl caches */ |
37d9d76d | 1171 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
4704f0e2 | 1172 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
37d9d76d N |
1173 | /* and probably clear data for a directory too as utimes can cause |
1174 | * havoc with our cache. | |
1175 | */ | |
1176 | if (S_ISDIR(inode->i_mode)) { | |
1177 | invalid |= NFS_INO_INVALID_DATA; | |
1178 | nfs_force_lookup_revalidate(inode); | |
1179 | } | |
9e6e70f8 | 1180 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
37d9d76d | 1181 | } |
62ab460c TM |
1182 | } else if (server->caps & NFS_CAP_CTIME) |
1183 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1184 | | NFS_INO_INVALID_ACCESS | |
1185 | | NFS_INO_INVALID_ACL | |
1186 | | NFS_INO_REVAL_FORCED); | |
47aabaa7 | 1187 | |
951a143b | 1188 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1189 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1190 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1191 | cur_isize = i_size_read(inode); | |
1192 | if (new_isize != cur_isize) { | |
1193 | /* Do we perhaps have any outstanding writes, or has | |
1194 | * the file grown beyond our last write? */ | |
1195 | if (nfsi->npages == 0 || new_isize > cur_isize) { | |
1196 | i_size_write(inode, new_isize); | |
1197 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1198 | } | |
1199 | dprintk("NFS: isize change on server for file %s/%ld\n", | |
1200 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 | 1201 | } |
62ab460c TM |
1202 | } else |
1203 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1204 | | NFS_INO_REVAL_PAGECACHE | |
1205 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1206 | |
1da177e4 | 1207 | |
9e6e70f8 TM |
1208 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1209 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1210 | else if (server->caps & NFS_CAP_ATIME) |
1211 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1212 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1213 | |
9e6e70f8 TM |
1214 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1215 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1216 | umode_t newmode = inode->i_mode & S_IFMT; |
1217 | newmode |= fattr->mode & S_IALLUGO; | |
1218 | inode->i_mode = newmode; | |
9e6e70f8 | 1219 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1220 | } |
62ab460c TM |
1221 | } else if (server->caps & NFS_CAP_MODE) |
1222 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1223 | | NFS_INO_INVALID_ACCESS | |
1224 | | NFS_INO_INVALID_ACL | |
1225 | | NFS_INO_REVAL_FORCED); | |
1226 | ||
9e6e70f8 TM |
1227 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1228 | if (inode->i_uid != fattr->uid) { | |
1229 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1230 | inode->i_uid = fattr->uid; | |
1231 | } | |
62ab460c TM |
1232 | } else if (server->caps & NFS_CAP_OWNER) |
1233 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1234 | | NFS_INO_INVALID_ACCESS | |
1235 | | NFS_INO_INVALID_ACL | |
1236 | | NFS_INO_REVAL_FORCED); | |
1237 | ||
9e6e70f8 TM |
1238 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1239 | if (inode->i_gid != fattr->gid) { | |
1240 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1241 | inode->i_gid = fattr->gid; | |
1242 | } | |
62ab460c TM |
1243 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1244 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1245 | | NFS_INO_INVALID_ACCESS | |
1246 | | NFS_INO_INVALID_ACL | |
1247 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1248 | |
9e6e70f8 TM |
1249 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1250 | if (inode->i_nlink != fattr->nlink) { | |
1251 | invalid |= NFS_INO_INVALID_ATTR; | |
1252 | if (S_ISDIR(inode->i_mode)) | |
1253 | invalid |= NFS_INO_INVALID_DATA; | |
1254 | inode->i_nlink = fattr->nlink; | |
1255 | } | |
62ab460c TM |
1256 | } else if (server->caps & NFS_CAP_NLINK) |
1257 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1258 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1259 | |
9e6e70f8 | 1260 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1261 | /* |
1262 | * report the blocks in 512byte units | |
1263 | */ | |
1264 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1265 | } |
9e6e70f8 TM |
1266 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1267 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1268 | |
1269 | /* Update attrtimeo value if we're out of the unstable period */ | |
1270 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1271 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1272 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1273 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1274 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1275 | } else { |
64672d55 | 1276 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1277 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1278 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1279 | nfsi->attrtimeo_timestamp = now; | |
1280 | } | |
1da177e4 | 1281 | } |
f2115dc9 | 1282 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1283 | /* Don't invalidate the data if we were to blame */ |
1284 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1285 | || S_ISLNK(inode->i_mode))) | |
1286 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce | 1287 | if (!nfs_have_delegation(inode, FMODE_READ) || |
62ab460c | 1288 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1289 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1290 | |
1291 | return 0; | |
1292 | out_changed: | |
1293 | /* | |
1294 | * Big trouble! The inode has become a different object. | |
1295 | */ | |
1da177e4 | 1296 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
3110ff80 | 1297 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
b37b03b7 | 1298 | out_err: |
1da177e4 LT |
1299 | /* |
1300 | * No need to worry about unhashing the dentry, as the | |
1301 | * lookup validation will know that the inode is bad. | |
1302 | * (But we fall through to invalidate the caches.) | |
1303 | */ | |
1304 | nfs_invalidate_inode(inode); | |
1da177e4 | 1305 | return -ESTALE; |
325cfed9 CL |
1306 | |
1307 | out_fileid: | |
1308 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1309 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
54ceac45 | 1310 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
325cfed9 CL |
1311 | (long long)nfsi->fileid, (long long)fattr->fileid); |
1312 | goto out_err; | |
1da177e4 LT |
1313 | } |
1314 | ||
55a97593 | 1315 | |
1da177e4 LT |
1316 | #ifdef CONFIG_NFS_V4 |
1317 | ||
1da177e4 LT |
1318 | /* |
1319 | * Clean out any remaining NFSv4 state that might be left over due | |
1320 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1321 | * nfs_open(). | |
1322 | */ | |
f7b422b1 | 1323 | void nfs4_clear_inode(struct inode *inode) |
1da177e4 | 1324 | { |
1da177e4 | 1325 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1326 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1327 | /* First call standard NFS clear_inode() code */ |
1328 | nfs_clear_inode(inode); | |
1da177e4 | 1329 | } |
1da177e4 LT |
1330 | #endif |
1331 | ||
f7b422b1 | 1332 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1333 | { |
1334 | struct nfs_inode *nfsi; | |
e94b1766 | 1335 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1336 | if (!nfsi) |
1337 | return NULL; | |
55296809 CL |
1338 | nfsi->flags = 0UL; |
1339 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1340 | #ifdef CONFIG_NFS_V3_ACL |
1341 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1342 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1343 | #endif | |
e50a1c2e BF |
1344 | #ifdef CONFIG_NFS_V4 |
1345 | nfsi->nfs4_acl = NULL; | |
1346 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1347 | return &nfsi->vfs_inode; |
1348 | } | |
1349 | ||
f7b422b1 | 1350 | void nfs_destroy_inode(struct inode *inode) |
1da177e4 LT |
1351 | { |
1352 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
1353 | } | |
1354 | ||
d75d5414 AM |
1355 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1356 | { | |
1357 | #ifdef CONFIG_NFS_V4 | |
1358 | INIT_LIST_HEAD(&nfsi->open_states); | |
1359 | nfsi->delegation = NULL; | |
1360 | nfsi->delegation_state = 0; | |
1361 | init_rwsem(&nfsi->rwsem); | |
1362 | #endif | |
1363 | } | |
f7b422b1 | 1364 | |
51cc5068 | 1365 | static void init_once(void *foo) |
1da177e4 LT |
1366 | { |
1367 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1368 | ||
a35afb83 | 1369 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1370 | INIT_LIST_HEAD(&nfsi->open_files); |
1371 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1372 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
1373 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
a35afb83 | 1374 | nfsi->npages = 0; |
ff778d02 | 1375 | nfsi->ncommit = 0; |
565277f6 TM |
1376 | atomic_set(&nfsi->silly_count, 1); |
1377 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1378 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1379 | nfs4_init_once(nfsi); |
1da177e4 | 1380 | } |
20c2df83 | 1381 | |
f7b422b1 | 1382 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1383 | { |
1384 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1385 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1386 | 0, (SLAB_RECLAIM_ACCOUNT| |
1387 | SLAB_MEM_SPREAD), | |
20c2df83 | 1388 | init_once); |
1da177e4 LT |
1389 | if (nfs_inode_cachep == NULL) |
1390 | return -ENOMEM; | |
1391 | ||
1392 | return 0; | |
1393 | } | |
1394 | ||
266bee88 | 1395 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1396 | { |
1a1d92c1 | 1397 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1398 | } |
1399 | ||
5746006f TM |
1400 | struct workqueue_struct *nfsiod_workqueue; |
1401 | ||
1402 | /* | |
1403 | * start up the nfsiod workqueue | |
1404 | */ | |
1405 | static int nfsiod_start(void) | |
1406 | { | |
1407 | struct workqueue_struct *wq; | |
1408 | dprintk("RPC: creating workqueue nfsiod\n"); | |
1409 | wq = create_singlethread_workqueue("nfsiod"); | |
1410 | if (wq == NULL) | |
1411 | return -ENOMEM; | |
1412 | nfsiod_workqueue = wq; | |
1413 | return 0; | |
1414 | } | |
1415 | ||
1416 | /* | |
1417 | * Destroy the nfsiod workqueue | |
1418 | */ | |
1419 | static void nfsiod_stop(void) | |
1420 | { | |
1421 | struct workqueue_struct *wq; | |
1422 | ||
1423 | wq = nfsiod_workqueue; | |
1424 | if (wq == NULL) | |
1425 | return; | |
1426 | nfsiod_workqueue = NULL; | |
1427 | destroy_workqueue(wq); | |
1428 | } | |
1429 | ||
1da177e4 LT |
1430 | /* |
1431 | * Initialize NFS | |
1432 | */ | |
1433 | static int __init init_nfs_fs(void) | |
1434 | { | |
1435 | int err; | |
1436 | ||
e571cbf1 TM |
1437 | err = nfs_dns_resolver_init(); |
1438 | if (err < 0) | |
1439 | goto out8; | |
1440 | ||
8ec442ae DH |
1441 | err = nfs_fscache_register(); |
1442 | if (err < 0) | |
1443 | goto out7; | |
1444 | ||
5746006f TM |
1445 | err = nfsiod_start(); |
1446 | if (err) | |
1447 | goto out6; | |
1448 | ||
6aaca566 DH |
1449 | err = nfs_fs_proc_init(); |
1450 | if (err) | |
1451 | goto out5; | |
1452 | ||
1da177e4 LT |
1453 | err = nfs_init_nfspagecache(); |
1454 | if (err) | |
1455 | goto out4; | |
1456 | ||
1457 | err = nfs_init_inodecache(); | |
1458 | if (err) | |
1459 | goto out3; | |
1460 | ||
1461 | err = nfs_init_readpagecache(); | |
1462 | if (err) | |
1463 | goto out2; | |
1464 | ||
1465 | err = nfs_init_writepagecache(); | |
1466 | if (err) | |
1467 | goto out1; | |
1468 | ||
1da177e4 LT |
1469 | err = nfs_init_directcache(); |
1470 | if (err) | |
1471 | goto out0; | |
1da177e4 LT |
1472 | |
1473 | #ifdef CONFIG_PROC_FS | |
1474 | rpc_proc_register(&nfs_rpcstat); | |
1475 | #endif | |
f7b422b1 | 1476 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1477 | goto out; |
1478 | return 0; | |
1479 | out: | |
1480 | #ifdef CONFIG_PROC_FS | |
1481 | rpc_proc_unregister("nfs"); | |
1482 | #endif | |
1da177e4 | 1483 | nfs_destroy_directcache(); |
6b59a754 | 1484 | out0: |
6b59a754 | 1485 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1486 | out1: |
1487 | nfs_destroy_readpagecache(); | |
1488 | out2: | |
1489 | nfs_destroy_inodecache(); | |
1490 | out3: | |
1491 | nfs_destroy_nfspagecache(); | |
1492 | out4: | |
6aaca566 DH |
1493 | nfs_fs_proc_exit(); |
1494 | out5: | |
5746006f TM |
1495 | nfsiod_stop(); |
1496 | out6: | |
8ec442ae DH |
1497 | nfs_fscache_unregister(); |
1498 | out7: | |
e571cbf1 TM |
1499 | nfs_dns_resolver_destroy(); |
1500 | out8: | |
1da177e4 LT |
1501 | return err; |
1502 | } | |
1503 | ||
1504 | static void __exit exit_nfs_fs(void) | |
1505 | { | |
1da177e4 | 1506 | nfs_destroy_directcache(); |
1da177e4 LT |
1507 | nfs_destroy_writepagecache(); |
1508 | nfs_destroy_readpagecache(); | |
1509 | nfs_destroy_inodecache(); | |
1510 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1511 | nfs_fscache_unregister(); |
e571cbf1 | 1512 | nfs_dns_resolver_destroy(); |
1da177e4 LT |
1513 | #ifdef CONFIG_PROC_FS |
1514 | rpc_proc_unregister("nfs"); | |
1515 | #endif | |
f7b422b1 | 1516 | unregister_nfs_fs(); |
6aaca566 | 1517 | nfs_fs_proc_exit(); |
5746006f | 1518 | nfsiod_stop(); |
1da177e4 LT |
1519 | } |
1520 | ||
1521 | /* Not quite true; I just maintain it */ | |
1522 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1523 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1524 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1525 | |
1526 | module_init(init_nfs_fs) | |
1527 | module_exit(exit_nfs_fs) |