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; | |
987f8dfc TM |
396 | struct nfs_fattr *fattr; |
397 | int error = -ENOMEM; | |
1da177e4 | 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 | } | |
987f8dfc TM |
420 | |
421 | fattr = nfs_alloc_fattr(); | |
422 | if (fattr == NULL) | |
423 | goto out; | |
642ac549 TM |
424 | /* |
425 | * Return any delegations if we're going to change ACLs | |
426 | */ | |
427 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
428 | nfs_inode_return_delegation(inode); | |
987f8dfc | 429 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 430 | if (error == 0) |
987f8dfc TM |
431 | nfs_refresh_inode(inode, fattr); |
432 | nfs_free_fattr(fattr); | |
433 | out: | |
65e4308d TM |
434 | return error; |
435 | } | |
436 | ||
a3d01454 TM |
437 | /** |
438 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
439 | * @inode: inode of the file used | |
440 | * @offset: file offset to start truncating | |
441 | * | |
442 | * This is a copy of the common vmtruncate, but with the locking | |
443 | * corrected to take into account the fact that NFS requires | |
444 | * inode->i_size to be updated under the inode->i_lock. | |
445 | */ | |
446 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
447 | { | |
c08d3b0e | 448 | loff_t oldsize; |
449 | int err; | |
a3d01454 | 450 | |
c08d3b0e | 451 | err = inode_newsize_ok(inode, offset); |
452 | if (err) | |
453 | goto out; | |
a3d01454 | 454 | |
c08d3b0e | 455 | spin_lock(&inode->i_lock); |
456 | oldsize = inode->i_size; | |
457 | i_size_write(inode, offset); | |
458 | spin_unlock(&inode->i_lock); | |
459 | ||
460 | truncate_pagecache(inode, oldsize, offset); | |
461 | out: | |
462 | return err; | |
a3d01454 TM |
463 | } |
464 | ||
65e4308d TM |
465 | /** |
466 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
467 | * @inode: pointer to struct inode | |
468 | * @attr: pointer to struct iattr | |
469 | * | |
470 | * Note: we do this in the *proc.c in order to ensure that | |
471 | * it works for things like exclusive creates too. | |
472 | */ | |
473 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
474 | { | |
475 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 476 | spin_lock(&inode->i_lock); |
1da177e4 | 477 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
478 | int mode = attr->ia_mode & S_IALLUGO; |
479 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
480 | inode->i_mode = mode; |
481 | } | |
482 | if ((attr->ia_valid & ATTR_UID) != 0) | |
483 | inode->i_uid = attr->ia_uid; | |
484 | if ((attr->ia_valid & ATTR_GID) != 0) | |
485 | inode->i_gid = attr->ia_gid; | |
55296809 | 486 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 487 | spin_unlock(&inode->i_lock); |
65e4308d TM |
488 | } |
489 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 490 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 491 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 492 | } |
1da177e4 LT |
493 | } |
494 | ||
1da177e4 LT |
495 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
496 | { | |
497 | struct inode *inode = dentry->d_inode; | |
55296809 | 498 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
499 | int err; |
500 | ||
acdc53b2 | 501 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 502 | if (S_ISREG(inode->i_mode)) { |
acdc53b2 TM |
503 | err = filemap_write_and_wait(inode->i_mapping); |
504 | if (err) | |
505 | goto out; | |
28c494c5 | 506 | } |
fc33a7bb CH |
507 | |
508 | /* | |
509 | * We may force a getattr if the user cares about atime. | |
510 | * | |
511 | * Note that we only have to check the vfsmount flags here: | |
512 | * - NFS always sets S_NOATIME by so checking it would give a | |
513 | * bogus result | |
514 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
515 | * no point in checking those. | |
516 | */ | |
517 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
518 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 519 | need_atime = 0; |
fc33a7bb | 520 | |
1da177e4 LT |
521 | if (need_atime) |
522 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
523 | else | |
524 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 525 | if (!err) { |
1da177e4 | 526 | generic_fillattr(inode, stat); |
f43bf0be | 527 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 528 | } |
acdc53b2 | 529 | out: |
1da177e4 LT |
530 | return err; |
531 | } | |
532 | ||
7fe5c398 TM |
533 | /** |
534 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
535 | * @ctx: pointer to context | |
536 | * @is_sync: is this a synchronous close | |
537 | * | |
538 | * always ensure that the attributes are up to date if we're mounted | |
539 | * with close-to-open semantics | |
540 | */ | |
541 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
542 | { | |
543 | struct inode *inode; | |
544 | struct nfs_server *server; | |
545 | ||
546 | if (!(ctx->mode & FMODE_WRITE)) | |
547 | return; | |
548 | if (!is_sync) | |
549 | return; | |
550 | inode = ctx->path.dentry->d_inode; | |
551 | if (!list_empty(&NFS_I(inode)->open_files)) | |
552 | return; | |
553 | server = NFS_SERVER(inode); | |
554 | if (server->flags & NFS_MOUNT_NOCTO) | |
555 | return; | |
556 | nfs_revalidate_inode(server, inode); | |
557 | } | |
558 | ||
6eae7974 | 559 | static struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred) |
1da177e4 LT |
560 | { |
561 | struct nfs_open_context *ctx; | |
562 | ||
f52720ca | 563 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
1da177e4 | 564 | if (ctx != NULL) { |
6eae7974 AV |
565 | ctx->path = *path; |
566 | path_get(&ctx->path); | |
1da177e4 LT |
567 | ctx->cred = get_rpccred(cred); |
568 | ctx->state = NULL; | |
569 | ctx->lockowner = current->files; | |
66d3aac0 | 570 | ctx->flags = 0; |
1da177e4 | 571 | ctx->error = 0; |
00a92642 | 572 | ctx->dir_cookie = 0; |
5e11934d | 573 | atomic_set(&ctx->count, 1); |
1da177e4 LT |
574 | } |
575 | return ctx; | |
576 | } | |
577 | ||
578 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
579 | { | |
580 | if (ctx != NULL) | |
5e11934d | 581 | atomic_inc(&ctx->count); |
1da177e4 LT |
582 | return ctx; |
583 | } | |
584 | ||
7fe5c398 | 585 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 586 | { |
7fe5c398 | 587 | struct inode *inode = ctx->path.dentry->d_inode; |
3bec63db | 588 | |
5e11934d TM |
589 | if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock)) |
590 | return; | |
591 | list_del(&ctx->list); | |
592 | spin_unlock(&inode->i_lock); | |
7fe5c398 | 593 | NFS_PROTO(inode)->close_context(ctx, is_sync); |
3bec63db TM |
594 | if (ctx->cred != NULL) |
595 | put_rpccred(ctx->cred); | |
31f31db1 | 596 | path_put(&ctx->path); |
3bec63db TM |
597 | kfree(ctx); |
598 | } | |
599 | ||
a49c3c77 TM |
600 | void put_nfs_open_context(struct nfs_open_context *ctx) |
601 | { | |
602 | __put_nfs_open_context(ctx, 0); | |
603 | } | |
604 | ||
1da177e4 LT |
605 | /* |
606 | * Ensure that mmap has a recent RPC credential for use when writing out | |
607 | * shared pages | |
608 | */ | |
b92dccf6 | 609 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 610 | { |
01cce933 | 611 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
612 | struct nfs_inode *nfsi = NFS_I(inode); |
613 | ||
614 | filp->private_data = get_nfs_open_context(ctx); | |
615 | spin_lock(&inode->i_lock); | |
616 | list_add(&ctx->list, &nfsi->open_files); | |
617 | spin_unlock(&inode->i_lock); | |
618 | } | |
619 | ||
d530838b TM |
620 | /* |
621 | * Given an inode, search for an open context with the desired characteristics | |
622 | */ | |
dc0b027d | 623 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
624 | { |
625 | struct nfs_inode *nfsi = NFS_I(inode); | |
626 | struct nfs_open_context *pos, *ctx = NULL; | |
627 | ||
628 | spin_lock(&inode->i_lock); | |
629 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
630 | if (cred != NULL && pos->cred != cred) |
631 | continue; | |
1544fa0f TM |
632 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
633 | continue; | |
634 | ctx = get_nfs_open_context(pos); | |
635 | break; | |
1da177e4 LT |
636 | } |
637 | spin_unlock(&inode->i_lock); | |
638 | return ctx; | |
639 | } | |
640 | ||
b92dccf6 | 641 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 642 | { |
01cce933 | 643 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 644 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
645 | |
646 | if (ctx) { | |
647 | filp->private_data = NULL; | |
648 | spin_lock(&inode->i_lock); | |
649 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
650 | spin_unlock(&inode->i_lock); | |
f895c53f | 651 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
652 | } |
653 | } | |
654 | ||
655 | /* | |
656 | * These allocate and release file read/write context information. | |
657 | */ | |
658 | int nfs_open(struct inode *inode, struct file *filp) | |
659 | { | |
660 | struct nfs_open_context *ctx; | |
661 | struct rpc_cred *cred; | |
662 | ||
98a8e323 | 663 | cred = rpc_lookup_cred(); |
1da177e4 LT |
664 | if (IS_ERR(cred)) |
665 | return PTR_ERR(cred); | |
6eae7974 | 666 | ctx = alloc_nfs_open_context(&filp->f_path, cred); |
1da177e4 LT |
667 | put_rpccred(cred); |
668 | if (ctx == NULL) | |
669 | return -ENOMEM; | |
670 | ctx->mode = filp->f_mode; | |
671 | nfs_file_set_open_context(filp, ctx); | |
672 | put_nfs_open_context(ctx); | |
ef79c097 | 673 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
674 | return 0; |
675 | } | |
676 | ||
677 | int nfs_release(struct inode *inode, struct file *filp) | |
678 | { | |
1da177e4 LT |
679 | nfs_file_clear_open_context(filp); |
680 | return 0; | |
681 | } | |
682 | ||
683 | /* | |
684 | * This function is called whenever some part of NFS notices that | |
685 | * the cached attributes have to be refreshed. | |
686 | */ | |
687 | int | |
688 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
689 | { | |
690 | int status = -ESTALE; | |
a3cba2aa | 691 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 692 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
693 | |
694 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
695 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
696 | ||
85233a7a | 697 | if (is_bad_inode(inode)) |
691beb13 | 698 | goto out; |
1da177e4 | 699 | if (NFS_STALE(inode)) |
412d582e | 700 | goto out; |
7fdc49c4 | 701 | |
a3cba2aa TM |
702 | status = -ENOMEM; |
703 | fattr = nfs_alloc_fattr(); | |
704 | if (fattr == NULL) | |
705 | goto out; | |
706 | ||
691beb13 | 707 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
a3cba2aa | 708 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
1da177e4 LT |
709 | if (status != 0) { |
710 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
711 | inode->i_sb->s_id, | |
712 | (long long)NFS_FILEID(inode), status); | |
713 | if (status == -ESTALE) { | |
714 | nfs_zap_caches(inode); | |
715 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 716 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
717 | } |
718 | goto out; | |
719 | } | |
720 | ||
a3cba2aa | 721 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
722 | if (status) { |
723 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
724 | inode->i_sb->s_id, | |
725 | (long long)NFS_FILEID(inode), status); | |
726 | goto out; | |
727 | } | |
55296809 | 728 | |
24aa1fe6 | 729 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 730 | nfs_zap_acl_cache(inode); |
55296809 | 731 | |
1da177e4 LT |
732 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
733 | inode->i_sb->s_id, | |
734 | (long long)NFS_FILEID(inode)); | |
735 | ||
412d582e | 736 | out: |
a3cba2aa | 737 | nfs_free_fattr(fattr); |
1da177e4 LT |
738 | return status; |
739 | } | |
740 | ||
741 | int nfs_attribute_timeout(struct inode *inode) | |
742 | { | |
743 | struct nfs_inode *nfsi = NFS_I(inode); | |
744 | ||
b4d2314b | 745 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 746 | return 0; |
64672d55 | 747 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
1da177e4 LT |
748 | } |
749 | ||
750 | /** | |
751 | * nfs_revalidate_inode - Revalidate the inode attributes | |
752 | * @server - pointer to nfs_server struct | |
753 | * @inode - pointer to inode struct | |
754 | * | |
755 | * Updates inode attribute information by retrieving the data from the server. | |
756 | */ | |
757 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
758 | { | |
44b11874 | 759 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
1da177e4 LT |
760 | && !nfs_attribute_timeout(inode)) |
761 | return NFS_STALE(inode) ? -ESTALE : 0; | |
762 | return __nfs_revalidate_inode(server, inode); | |
763 | } | |
764 | ||
1cda707d | 765 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
766 | { |
767 | struct nfs_inode *nfsi = NFS_I(inode); | |
768 | ||
769 | if (mapping->nrpages != 0) { | |
770 | int ret = invalidate_inode_pages2(mapping); | |
771 | if (ret < 0) | |
772 | return ret; | |
773 | } | |
774 | spin_lock(&inode->i_lock); | |
775 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 776 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 777 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
778 | spin_unlock(&inode->i_lock); |
779 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 780 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
781 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
782 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
783 | return 0; | |
784 | } | |
785 | ||
717d44e8 TM |
786 | /** |
787 | * nfs_revalidate_mapping - Revalidate the pagecache | |
788 | * @inode - pointer to host inode | |
789 | * @mapping - pointer to mapping | |
717d44e8 TM |
790 | */ |
791 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
792 | { | |
793 | struct nfs_inode *nfsi = NFS_I(inode); | |
794 | int ret = 0; | |
dc59250c | 795 | |
717d44e8 TM |
796 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
797 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { | |
798 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
799 | if (ret < 0) | |
800 | goto out; | |
7d52e862 | 801 | } |
717d44e8 TM |
802 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
803 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 804 | out: |
44b11874 | 805 | return ret; |
7d52e862 TM |
806 | } |
807 | ||
a895b4a1 TM |
808 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
809 | { | |
810 | struct nfs_inode *nfsi = NFS_I(inode); | |
811 | ||
9e6e70f8 TM |
812 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
813 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
814 | && nfsi->change_attr == fattr->pre_change_attr) { | |
70ca8852 TM |
815 | nfsi->change_attr = fattr->change_attr; |
816 | if (S_ISDIR(inode->i_mode)) | |
817 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
818 | } | |
a895b4a1 | 819 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
820 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
821 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
822 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) | |
a895b4a1 | 823 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
9e6e70f8 TM |
824 | |
825 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
826 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
827 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
a895b4a1 | 828 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
e323ea46 TM |
829 | if (S_ISDIR(inode->i_mode)) |
830 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
a895b4a1 | 831 | } |
9e6e70f8 TM |
832 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
833 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
834 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
835 | && nfsi->npages == 0) | |
836 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
a895b4a1 TM |
837 | } |
838 | ||
1da177e4 | 839 | /** |
33801147 | 840 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
841 | * @inode - pointer to inode |
842 | * @fattr - updated attributes | |
843 | * | |
844 | * Verifies the attribute cache. If we have just changed the attributes, | |
845 | * so that fattr carries weak cache consistency data, then it may | |
846 | * also update the ctime/mtime/change_attribute. | |
847 | */ | |
33801147 | 848 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
849 | { |
850 | struct nfs_inode *nfsi = NFS_I(inode); | |
851 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 852 | unsigned long invalid = 0; |
1da177e4 | 853 | |
dc59250c | 854 | |
ca62b9c3 | 855 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
856 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
857 | return -EIO; | |
858 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 859 | return -EIO; |
ca62b9c3 | 860 | |
9e6e70f8 | 861 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
f1bb0b92 | 862 | nfsi->change_attr != fattr->change_attr) |
2a3f5fd4 | 863 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 864 | |
1da177e4 | 865 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 866 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
2a3f5fd4 | 867 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
ca62b9c3 | 868 | |
9e6e70f8 TM |
869 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
870 | cur_size = i_size_read(inode); | |
871 | new_isize = nfs_size_to_loff_t(fattr->size); | |
872 | if (cur_size != new_isize && nfsi->npages == 0) | |
873 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
874 | } | |
1da177e4 LT |
875 | |
876 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
877 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
878 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
879 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
880 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
881 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 882 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
883 | |
884 | /* Has the link count changed? */ | |
9e6e70f8 | 885 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 886 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 887 | |
9e6e70f8 | 888 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
889 | invalid |= NFS_INO_INVALID_ATIME; |
890 | ||
891 | if (invalid != 0) | |
892 | nfsi->cache_validity |= invalid; | |
1da177e4 | 893 | |
33801147 | 894 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
895 | return 0; |
896 | } | |
897 | ||
a10ad176 | 898 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 899 | { |
9e6e70f8 TM |
900 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
901 | return 0; | |
a10ad176 TM |
902 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
903 | } | |
904 | ||
905 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
906 | { | |
9e6e70f8 TM |
907 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
908 | return 0; | |
a10ad176 TM |
909 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
910 | } | |
870a5be8 | 911 | |
ae05f269 | 912 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
913 | |
914 | static unsigned long nfs_read_attr_generation_counter(void) | |
915 | { | |
ae05f269 | 916 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
917 | } |
918 | ||
919 | unsigned long nfs_inc_attr_generation_counter(void) | |
920 | { | |
ae05f269 | 921 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
922 | } |
923 | ||
924 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
925 | { | |
926 | fattr->valid = 0; | |
927 | fattr->time_start = jiffies; | |
928 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
929 | } | |
930 | ||
2d36bfde TM |
931 | struct nfs_fattr *nfs_alloc_fattr(void) |
932 | { | |
933 | struct nfs_fattr *fattr; | |
934 | ||
935 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
936 | if (fattr != NULL) | |
937 | nfs_fattr_init(fattr); | |
938 | return fattr; | |
939 | } | |
940 | ||
941 | struct nfs_fh *nfs_alloc_fhandle(void) | |
942 | { | |
943 | struct nfs_fh *fh; | |
944 | ||
945 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
946 | if (fh != NULL) | |
947 | fh->size = 0; | |
948 | return fh; | |
949 | } | |
950 | ||
a10ad176 TM |
951 | /** |
952 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
953 | * @inode - pointer to inode | |
954 | * @fattr - attributes | |
955 | * | |
956 | * Attempt to divine whether or not an RPC call reply carrying stale | |
957 | * attributes got scheduled after another call carrying updated ones. | |
958 | * | |
959 | * To do so, the function first assumes that a more recent ctime means | |
960 | * that the attributes in fattr are newer, however it also attempt to | |
961 | * catch the case where ctime either didn't change, or went backwards | |
962 | * (if someone reset the clock on the server) by looking at whether | |
963 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 964 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
965 | * |
966 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
967 | * more recent than the ones cached in the inode. | |
968 | * | |
969 | */ | |
970 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
971 | { | |
972 | const struct nfs_inode *nfsi = NFS_I(inode); | |
973 | ||
4704f0e2 | 974 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
975 | nfs_ctime_need_update(inode, fattr) || |
976 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 977 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
978 | } |
979 | ||
980 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
981 | { | |
982 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
983 | return nfs_update_inode(inode, fattr); |
984 | return nfs_check_inode_attributes(inode, fattr); | |
985 | } | |
986 | ||
33801147 TM |
987 | /** |
988 | * nfs_refresh_inode - try to update the inode attribute cache | |
989 | * @inode - pointer to inode | |
990 | * @fattr - updated attributes | |
991 | * | |
992 | * Check that an RPC call that returned attributes has not overlapped with | |
993 | * other recent updates of the inode metadata, then decide whether it is | |
994 | * safe to do a full update of the inode attributes, or whether just to | |
995 | * call nfs_check_inode_attributes. | |
996 | */ | |
997 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
998 | { | |
33801147 TM |
999 | int status; |
1000 | ||
1001 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1002 | return 0; | |
1003 | spin_lock(&inode->i_lock); | |
870a5be8 | 1004 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1005 | spin_unlock(&inode->i_lock); |
ef79c097 | 1006 | |
33801147 TM |
1007 | return status; |
1008 | } | |
1009 | ||
d65f557f TM |
1010 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1011 | { | |
1012 | struct nfs_inode *nfsi = NFS_I(inode); | |
1013 | ||
1014 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1015 | if (S_ISDIR(inode->i_mode)) | |
1016 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1017 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1018 | return 0; | |
1019 | return nfs_refresh_inode_locked(inode, fattr); | |
1020 | } | |
1021 | ||
decf491f TM |
1022 | /** |
1023 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1024 | * @inode - pointer to inode | |
1025 | * @fattr - updated attributes | |
1026 | * | |
1027 | * After an operation that has changed the inode metadata, mark the | |
1028 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1029 | * |
1030 | * NB: if the server didn't return any post op attributes, this | |
1031 | * function will force the retrieval of attributes before the next | |
1032 | * NFS request. Thus it should be used only for operations that | |
1033 | * are expected to change one or more attributes, to avoid | |
1034 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1035 | */ |
1036 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1037 | { | |
d65f557f | 1038 | int status; |
decf491f | 1039 | |
7668fdbe | 1040 | spin_lock(&inode->i_lock); |
d65f557f | 1041 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1042 | spin_unlock(&inode->i_lock); |
870a5be8 | 1043 | return status; |
decf491f TM |
1044 | } |
1045 | ||
70ca8852 TM |
1046 | /** |
1047 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1048 | * @inode - pointer to inode | |
1049 | * @fattr - updated attributes | |
1050 | * | |
1051 | * After an operation that has changed the inode metadata, mark the | |
1052 | * attribute cache as being invalid, then try to update it. Fake up | |
1053 | * weak cache consistency data, if none exist. | |
1054 | * | |
1055 | * This function is mainly designed to be used by the ->write_done() functions. | |
1056 | */ | |
1057 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1058 | { | |
d65f557f TM |
1059 | int status; |
1060 | ||
1061 | spin_lock(&inode->i_lock); | |
1062 | /* Don't do a WCC update if these attributes are already stale */ | |
1063 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1064 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1065 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1066 | | NFS_ATTR_FATTR_PRESIZE | |
1067 | | NFS_ATTR_FATTR_PREMTIME | |
1068 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1069 | goto out_noforce; |
1070 | } | |
9e6e70f8 TM |
1071 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1072 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
70ca8852 | 1073 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
9e6e70f8 | 1074 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1075 | } |
9e6e70f8 TM |
1076 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1077 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1078 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1079 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1080 | } | |
1081 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1082 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1083 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1084 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1085 | } | |
1086 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1087 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1088 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1089 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1090 | } |
d65f557f TM |
1091 | out_noforce: |
1092 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1093 | spin_unlock(&inode->i_lock); | |
1094 | return status; | |
70ca8852 TM |
1095 | } |
1096 | ||
1da177e4 LT |
1097 | /* |
1098 | * Many nfs protocol calls return the new file attributes after | |
1099 | * an operation. Here we update the inode to reflect the state | |
1100 | * of the server's inode. | |
1101 | * | |
1102 | * This is a bit tricky because we have to make sure all dirty pages | |
1103 | * have been sent off to the server before calling invalidate_inode_pages. | |
1104 | * To make sure no other process adds more write requests while we try | |
1105 | * our best to flush them, we make them sleep during the attribute refresh. | |
1106 | * | |
1107 | * A very similar scenario holds for the dir cache. | |
1108 | */ | |
24aa1fe6 | 1109 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1110 | { |
8b4bdcf8 | 1111 | struct nfs_server *server; |
1da177e4 | 1112 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1113 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1114 | unsigned long invalid = 0; |
3e7d950a | 1115 | unsigned long now = jiffies; |
62ab460c | 1116 | unsigned long save_cache_validity; |
1da177e4 LT |
1117 | |
1118 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
3110ff80 | 1119 | __func__, inode->i_sb->s_id, inode->i_ino, |
1da177e4 LT |
1120 | atomic_read(&inode->i_count), fattr->valid); |
1121 | ||
9e6e70f8 | 1122 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
325cfed9 | 1123 | goto out_fileid; |
1da177e4 LT |
1124 | |
1125 | /* | |
1126 | * Make sure the inode's type hasn't changed. | |
1127 | */ | |
9e6e70f8 | 1128 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1129 | goto out_changed; |
1130 | ||
8b4bdcf8 | 1131 | server = NFS_SERVER(inode); |
a0356862 | 1132 | /* Update the fsid? */ |
9e6e70f8 | 1133 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 TM |
1134 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
1135 | !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags)) | |
8b4bdcf8 TM |
1136 | server->fsid = fattr->fsid; |
1137 | ||
1da177e4 LT |
1138 | /* |
1139 | * Update the read time so we don't revalidate too often. | |
1140 | */ | |
33801147 | 1141 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1142 | |
62ab460c TM |
1143 | save_cache_validity = nfsi->cache_validity; |
1144 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1145 | | NFS_INO_INVALID_ATIME | |
1146 | | NFS_INO_REVAL_FORCED | |
1147 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1148 | |
a895b4a1 TM |
1149 | /* Do atomic weak cache consistency updates */ |
1150 | nfs_wcc_update_inode(inode, fattr); | |
1151 | ||
47aabaa7 | 1152 | /* More cache consistency checks */ |
9e6e70f8 TM |
1153 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
1154 | if (nfsi->change_attr != fattr->change_attr) { | |
1155 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
1156 | inode->i_sb->s_id, inode->i_ino); | |
1157 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1158 | if (S_ISDIR(inode->i_mode)) | |
1159 | nfs_force_lookup_revalidate(inode); | |
1160 | nfsi->change_attr = fattr->change_attr; | |
1161 | } | |
62ab460c TM |
1162 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1163 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1164 | |
1165 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
47aabaa7 TM |
1166 | /* NFSv2/v3: Check if the mtime agrees */ |
1167 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { | |
1168 | dprintk("NFS: mtime change on server for file %s/%ld\n", | |
1169 | inode->i_sb->s_id, inode->i_ino); | |
1170 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
bfc69a45 TM |
1171 | if (S_ISDIR(inode->i_mode)) |
1172 | nfs_force_lookup_revalidate(inode); | |
9e6e70f8 | 1173 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
47aabaa7 | 1174 | } |
62ab460c TM |
1175 | } else if (server->caps & NFS_CAP_MTIME) |
1176 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1177 | | NFS_INO_INVALID_DATA | |
1178 | | NFS_INO_REVAL_PAGECACHE | |
1179 | | NFS_INO_REVAL_FORCED); | |
1180 | ||
9e6e70f8 | 1181 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
47aabaa7 | 1182 | /* If ctime has changed we should definitely clear access+acl caches */ |
37d9d76d | 1183 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
4704f0e2 | 1184 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
37d9d76d N |
1185 | /* and probably clear data for a directory too as utimes can cause |
1186 | * havoc with our cache. | |
1187 | */ | |
1188 | if (S_ISDIR(inode->i_mode)) { | |
1189 | invalid |= NFS_INO_INVALID_DATA; | |
1190 | nfs_force_lookup_revalidate(inode); | |
1191 | } | |
9e6e70f8 | 1192 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
37d9d76d | 1193 | } |
62ab460c TM |
1194 | } else if (server->caps & NFS_CAP_CTIME) |
1195 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1196 | | NFS_INO_INVALID_ACCESS | |
1197 | | NFS_INO_INVALID_ACL | |
1198 | | NFS_INO_REVAL_FORCED); | |
47aabaa7 | 1199 | |
951a143b | 1200 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1201 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1202 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1203 | cur_isize = i_size_read(inode); | |
1204 | if (new_isize != cur_isize) { | |
1205 | /* Do we perhaps have any outstanding writes, or has | |
1206 | * the file grown beyond our last write? */ | |
1207 | if (nfsi->npages == 0 || new_isize > cur_isize) { | |
1208 | i_size_write(inode, new_isize); | |
1209 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1210 | } | |
1211 | dprintk("NFS: isize change on server for file %s/%ld\n", | |
1212 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 | 1213 | } |
62ab460c TM |
1214 | } else |
1215 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1216 | | NFS_INO_REVAL_PAGECACHE | |
1217 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1218 | |
1da177e4 | 1219 | |
9e6e70f8 TM |
1220 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1221 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1222 | else if (server->caps & NFS_CAP_ATIME) |
1223 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1224 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1225 | |
9e6e70f8 TM |
1226 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1227 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1228 | umode_t newmode = inode->i_mode & S_IFMT; |
1229 | newmode |= fattr->mode & S_IALLUGO; | |
1230 | inode->i_mode = newmode; | |
9e6e70f8 | 1231 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1232 | } |
62ab460c TM |
1233 | } else if (server->caps & NFS_CAP_MODE) |
1234 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1235 | | NFS_INO_INVALID_ACCESS | |
1236 | | NFS_INO_INVALID_ACL | |
1237 | | NFS_INO_REVAL_FORCED); | |
1238 | ||
9e6e70f8 TM |
1239 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1240 | if (inode->i_uid != fattr->uid) { | |
1241 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1242 | inode->i_uid = fattr->uid; | |
1243 | } | |
62ab460c TM |
1244 | } else if (server->caps & NFS_CAP_OWNER) |
1245 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1246 | | NFS_INO_INVALID_ACCESS | |
1247 | | NFS_INO_INVALID_ACL | |
1248 | | NFS_INO_REVAL_FORCED); | |
1249 | ||
9e6e70f8 TM |
1250 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1251 | if (inode->i_gid != fattr->gid) { | |
1252 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1253 | inode->i_gid = fattr->gid; | |
1254 | } | |
62ab460c TM |
1255 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1256 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1257 | | NFS_INO_INVALID_ACCESS | |
1258 | | NFS_INO_INVALID_ACL | |
1259 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1260 | |
9e6e70f8 TM |
1261 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1262 | if (inode->i_nlink != fattr->nlink) { | |
1263 | invalid |= NFS_INO_INVALID_ATTR; | |
1264 | if (S_ISDIR(inode->i_mode)) | |
1265 | invalid |= NFS_INO_INVALID_DATA; | |
1266 | inode->i_nlink = fattr->nlink; | |
1267 | } | |
62ab460c TM |
1268 | } else if (server->caps & NFS_CAP_NLINK) |
1269 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1270 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1271 | |
9e6e70f8 | 1272 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1273 | /* |
1274 | * report the blocks in 512byte units | |
1275 | */ | |
1276 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1277 | } |
9e6e70f8 TM |
1278 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1279 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1280 | |
1281 | /* Update attrtimeo value if we're out of the unstable period */ | |
1282 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1283 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1284 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1285 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1286 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1287 | } else { |
64672d55 | 1288 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1289 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1290 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1291 | nfsi->attrtimeo_timestamp = now; | |
1292 | } | |
1da177e4 | 1293 | } |
f2115dc9 | 1294 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1295 | /* Don't invalidate the data if we were to blame */ |
1296 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1297 | || S_ISLNK(inode->i_mode))) | |
1298 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce | 1299 | if (!nfs_have_delegation(inode, FMODE_READ) || |
62ab460c | 1300 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1301 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1302 | |
1303 | return 0; | |
1304 | out_changed: | |
1305 | /* | |
1306 | * Big trouble! The inode has become a different object. | |
1307 | */ | |
1da177e4 | 1308 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
3110ff80 | 1309 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
b37b03b7 | 1310 | out_err: |
1da177e4 LT |
1311 | /* |
1312 | * No need to worry about unhashing the dentry, as the | |
1313 | * lookup validation will know that the inode is bad. | |
1314 | * (But we fall through to invalidate the caches.) | |
1315 | */ | |
1316 | nfs_invalidate_inode(inode); | |
1da177e4 | 1317 | return -ESTALE; |
325cfed9 CL |
1318 | |
1319 | out_fileid: | |
1320 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1321 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
54ceac45 | 1322 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
325cfed9 CL |
1323 | (long long)nfsi->fileid, (long long)fattr->fileid); |
1324 | goto out_err; | |
1da177e4 LT |
1325 | } |
1326 | ||
55a97593 | 1327 | |
1da177e4 LT |
1328 | #ifdef CONFIG_NFS_V4 |
1329 | ||
1da177e4 LT |
1330 | /* |
1331 | * Clean out any remaining NFSv4 state that might be left over due | |
1332 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1333 | * nfs_open(). | |
1334 | */ | |
f7b422b1 | 1335 | void nfs4_clear_inode(struct inode *inode) |
1da177e4 | 1336 | { |
1da177e4 | 1337 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1338 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1339 | /* First call standard NFS clear_inode() code */ |
1340 | nfs_clear_inode(inode); | |
1da177e4 | 1341 | } |
1da177e4 LT |
1342 | #endif |
1343 | ||
f7b422b1 | 1344 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1345 | { |
1346 | struct nfs_inode *nfsi; | |
e94b1766 | 1347 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1348 | if (!nfsi) |
1349 | return NULL; | |
55296809 CL |
1350 | nfsi->flags = 0UL; |
1351 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1352 | #ifdef CONFIG_NFS_V3_ACL |
1353 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1354 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1355 | #endif | |
e50a1c2e BF |
1356 | #ifdef CONFIG_NFS_V4 |
1357 | nfsi->nfs4_acl = NULL; | |
1358 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1359 | return &nfsi->vfs_inode; |
1360 | } | |
1361 | ||
f7b422b1 | 1362 | void nfs_destroy_inode(struct inode *inode) |
1da177e4 LT |
1363 | { |
1364 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
1365 | } | |
1366 | ||
d75d5414 AM |
1367 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1368 | { | |
1369 | #ifdef CONFIG_NFS_V4 | |
1370 | INIT_LIST_HEAD(&nfsi->open_states); | |
1371 | nfsi->delegation = NULL; | |
1372 | nfsi->delegation_state = 0; | |
1373 | init_rwsem(&nfsi->rwsem); | |
1374 | #endif | |
1375 | } | |
f7b422b1 | 1376 | |
51cc5068 | 1377 | static void init_once(void *foo) |
1da177e4 LT |
1378 | { |
1379 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1380 | ||
a35afb83 | 1381 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1382 | INIT_LIST_HEAD(&nfsi->open_files); |
1383 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1384 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
1385 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
a35afb83 | 1386 | nfsi->npages = 0; |
ff778d02 | 1387 | nfsi->ncommit = 0; |
565277f6 TM |
1388 | atomic_set(&nfsi->silly_count, 1); |
1389 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1390 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1391 | nfs4_init_once(nfsi); |
1da177e4 | 1392 | } |
20c2df83 | 1393 | |
f7b422b1 | 1394 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1395 | { |
1396 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1397 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1398 | 0, (SLAB_RECLAIM_ACCOUNT| |
1399 | SLAB_MEM_SPREAD), | |
20c2df83 | 1400 | init_once); |
1da177e4 LT |
1401 | if (nfs_inode_cachep == NULL) |
1402 | return -ENOMEM; | |
1403 | ||
1404 | return 0; | |
1405 | } | |
1406 | ||
266bee88 | 1407 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1408 | { |
1a1d92c1 | 1409 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1410 | } |
1411 | ||
5746006f TM |
1412 | struct workqueue_struct *nfsiod_workqueue; |
1413 | ||
1414 | /* | |
1415 | * start up the nfsiod workqueue | |
1416 | */ | |
1417 | static int nfsiod_start(void) | |
1418 | { | |
1419 | struct workqueue_struct *wq; | |
1420 | dprintk("RPC: creating workqueue nfsiod\n"); | |
1421 | wq = create_singlethread_workqueue("nfsiod"); | |
1422 | if (wq == NULL) | |
1423 | return -ENOMEM; | |
1424 | nfsiod_workqueue = wq; | |
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | /* | |
1429 | * Destroy the nfsiod workqueue | |
1430 | */ | |
1431 | static void nfsiod_stop(void) | |
1432 | { | |
1433 | struct workqueue_struct *wq; | |
1434 | ||
1435 | wq = nfsiod_workqueue; | |
1436 | if (wq == NULL) | |
1437 | return; | |
1438 | nfsiod_workqueue = NULL; | |
1439 | destroy_workqueue(wq); | |
1440 | } | |
1441 | ||
1da177e4 LT |
1442 | /* |
1443 | * Initialize NFS | |
1444 | */ | |
1445 | static int __init init_nfs_fs(void) | |
1446 | { | |
1447 | int err; | |
1448 | ||
e571cbf1 TM |
1449 | err = nfs_dns_resolver_init(); |
1450 | if (err < 0) | |
1451 | goto out8; | |
1452 | ||
8ec442ae DH |
1453 | err = nfs_fscache_register(); |
1454 | if (err < 0) | |
1455 | goto out7; | |
1456 | ||
5746006f TM |
1457 | err = nfsiod_start(); |
1458 | if (err) | |
1459 | goto out6; | |
1460 | ||
6aaca566 DH |
1461 | err = nfs_fs_proc_init(); |
1462 | if (err) | |
1463 | goto out5; | |
1464 | ||
1da177e4 LT |
1465 | err = nfs_init_nfspagecache(); |
1466 | if (err) | |
1467 | goto out4; | |
1468 | ||
1469 | err = nfs_init_inodecache(); | |
1470 | if (err) | |
1471 | goto out3; | |
1472 | ||
1473 | err = nfs_init_readpagecache(); | |
1474 | if (err) | |
1475 | goto out2; | |
1476 | ||
1477 | err = nfs_init_writepagecache(); | |
1478 | if (err) | |
1479 | goto out1; | |
1480 | ||
1da177e4 LT |
1481 | err = nfs_init_directcache(); |
1482 | if (err) | |
1483 | goto out0; | |
1da177e4 LT |
1484 | |
1485 | #ifdef CONFIG_PROC_FS | |
1486 | rpc_proc_register(&nfs_rpcstat); | |
1487 | #endif | |
f7b422b1 | 1488 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1489 | goto out; |
1490 | return 0; | |
1491 | out: | |
1492 | #ifdef CONFIG_PROC_FS | |
1493 | rpc_proc_unregister("nfs"); | |
1494 | #endif | |
1da177e4 | 1495 | nfs_destroy_directcache(); |
6b59a754 | 1496 | out0: |
6b59a754 | 1497 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1498 | out1: |
1499 | nfs_destroy_readpagecache(); | |
1500 | out2: | |
1501 | nfs_destroy_inodecache(); | |
1502 | out3: | |
1503 | nfs_destroy_nfspagecache(); | |
1504 | out4: | |
6aaca566 DH |
1505 | nfs_fs_proc_exit(); |
1506 | out5: | |
5746006f TM |
1507 | nfsiod_stop(); |
1508 | out6: | |
8ec442ae DH |
1509 | nfs_fscache_unregister(); |
1510 | out7: | |
e571cbf1 TM |
1511 | nfs_dns_resolver_destroy(); |
1512 | out8: | |
1da177e4 LT |
1513 | return err; |
1514 | } | |
1515 | ||
1516 | static void __exit exit_nfs_fs(void) | |
1517 | { | |
1da177e4 | 1518 | nfs_destroy_directcache(); |
1da177e4 LT |
1519 | nfs_destroy_writepagecache(); |
1520 | nfs_destroy_readpagecache(); | |
1521 | nfs_destroy_inodecache(); | |
1522 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1523 | nfs_fscache_unregister(); |
e571cbf1 | 1524 | nfs_dns_resolver_destroy(); |
1da177e4 LT |
1525 | #ifdef CONFIG_PROC_FS |
1526 | rpc_proc_unregister("nfs"); | |
1527 | #endif | |
f7b422b1 | 1528 | unregister_nfs_fs(); |
6aaca566 | 1529 | nfs_fs_proc_exit(); |
5746006f | 1530 | nfsiod_stop(); |
1da177e4 LT |
1531 | } |
1532 | ||
1533 | /* Not quite true; I just maintain it */ | |
1534 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1535 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1536 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1537 | |
1538 | module_init(init_nfs_fs) | |
1539 | module_exit(exit_nfs_fs) |