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 | ||
b57922d9 | 101 | static 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 | ||
b57922d9 AV |
113 | void nfs_evict_inode(struct inode *inode) |
114 | { | |
115 | truncate_inode_pages(&inode->i_data, 0); | |
116 | end_writeback(inode); | |
117 | nfs_clear_inode(inode); | |
118 | } | |
119 | ||
29884df0 TM |
120 | /** |
121 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
122 | */ | |
123 | int nfs_sync_mapping(struct address_space *mapping) | |
124 | { | |
5cf95214 | 125 | int ret = 0; |
29884df0 | 126 | |
5cf95214 TM |
127 | if (mapping->nrpages != 0) { |
128 | unmap_mapping_range(mapping, 0, 0, 0); | |
129 | ret = nfs_wb_all(mapping->host); | |
130 | } | |
29884df0 TM |
131 | return ret; |
132 | } | |
133 | ||
1da177e4 LT |
134 | /* |
135 | * Invalidate the local caches | |
136 | */ | |
b37b03b7 | 137 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
138 | { |
139 | struct nfs_inode *nfsi = NFS_I(inode); | |
140 | int mode = inode->i_mode; | |
141 | ||
91d5b470 CL |
142 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
143 | ||
c7c20973 TM |
144 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
145 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 LT |
146 | |
147 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
148 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 149 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 150 | else |
55296809 | 151 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 152 | } |
dc59250c | 153 | |
b37b03b7 TM |
154 | void nfs_zap_caches(struct inode *inode) |
155 | { | |
156 | spin_lock(&inode->i_lock); | |
157 | nfs_zap_caches_locked(inode); | |
dc59250c | 158 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
159 | } |
160 | ||
cd9ae2b6 TM |
161 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
162 | { | |
163 | if (mapping->nrpages != 0) { | |
164 | spin_lock(&inode->i_lock); | |
165 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
166 | spin_unlock(&inode->i_lock); | |
167 | } | |
168 | } | |
169 | ||
f41f7418 | 170 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
171 | { |
172 | void (*clear_acl_cache)(struct inode *); | |
173 | ||
174 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
175 | if (clear_acl_cache != NULL) | |
176 | clear_acl_cache(inode); | |
dc59250c | 177 | spin_lock(&inode->i_lock); |
55296809 | 178 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 179 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
180 | } |
181 | ||
c4812998 TM |
182 | void nfs_invalidate_atime(struct inode *inode) |
183 | { | |
184 | spin_lock(&inode->i_lock); | |
185 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
186 | spin_unlock(&inode->i_lock); | |
187 | } | |
188 | ||
1da177e4 | 189 | /* |
b37b03b7 TM |
190 | * Invalidate, but do not unhash, the inode. |
191 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 192 | */ |
b37b03b7 | 193 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 194 | { |
3a10c30a | 195 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 196 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
197 | } |
198 | ||
199 | struct nfs_find_desc { | |
200 | struct nfs_fh *fh; | |
201 | struct nfs_fattr *fattr; | |
202 | }; | |
203 | ||
204 | /* | |
205 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
206 | * this, and re-exported directories (also seen in NFSv2) | |
207 | * we are forced to allow 2 different inodes to have the same | |
208 | * i_ino. | |
209 | */ | |
210 | static int | |
211 | nfs_find_actor(struct inode *inode, void *opaque) | |
212 | { | |
213 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
214 | struct nfs_fh *fh = desc->fh; | |
215 | struct nfs_fattr *fattr = desc->fattr; | |
216 | ||
217 | if (NFS_FILEID(inode) != fattr->fileid) | |
218 | return 0; | |
219 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
220 | return 0; | |
221 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
222 | return 0; | |
223 | return 1; | |
224 | } | |
225 | ||
226 | static int | |
227 | nfs_init_locked(struct inode *inode, void *opaque) | |
228 | { | |
229 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
230 | struct nfs_fattr *fattr = desc->fattr; | |
231 | ||
99fadcd7 | 232 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
233 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
234 | return 0; | |
235 | } | |
236 | ||
1da177e4 LT |
237 | /* |
238 | * This is our front-end to iget that looks up inodes by file handle | |
239 | * instead of inode number. | |
240 | */ | |
241 | struct inode * | |
242 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
243 | { | |
244 | struct nfs_find_desc desc = { | |
245 | .fh = fh, | |
246 | .fattr = fattr | |
247 | }; | |
03f28e3a | 248 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
249 | unsigned long hash; |
250 | ||
9e6e70f8 | 251 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) |
1da177e4 | 252 | goto out_no_inode; |
9e6e70f8 | 253 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 254 | goto out_no_inode; |
1da177e4 LT |
255 | |
256 | hash = nfs_fattr_to_ino_t(fattr); | |
257 | ||
03f28e3a TM |
258 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
259 | if (inode == NULL) { | |
260 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 261 | goto out_no_inode; |
03f28e3a | 262 | } |
1da177e4 LT |
263 | |
264 | if (inode->i_state & I_NEW) { | |
265 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 266 | unsigned long now = jiffies; |
1da177e4 LT |
267 | |
268 | /* We set i_ino for the few things that still rely on it, | |
269 | * such as stat(2) */ | |
270 | inode->i_ino = hash; | |
271 | ||
272 | /* We can't support update_atime(), since the server will reset it */ | |
273 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
274 | inode->i_mode = fattr->mode; | |
62ab460c TM |
275 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
276 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
277 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
278 | | NFS_INO_INVALID_ACCESS | |
279 | | NFS_INO_INVALID_ACL; | |
1da177e4 LT |
280 | /* Why so? Because we want revalidate for devices/FIFOs, and |
281 | * that's precisely what we have in nfs_file_inode_operations. | |
282 | */ | |
8fa5c000 | 283 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 LT |
284 | if (S_ISREG(inode->i_mode)) { |
285 | inode->i_fop = &nfs_file_operations; | |
286 | inode->i_data.a_ops = &nfs_file_aops; | |
287 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
288 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 289 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 290 | inode->i_fop = &nfs_dir_operations; |
0715dc63 | 291 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)) |
3a10c30a | 292 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
55a97593 | 293 | /* Deal with crossing mountpoints */ |
9e6e70f8 TM |
294 | if ((fattr->valid & NFS_ATTR_FATTR_FSID) |
295 | && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { | |
6b97fd3d MN |
296 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
297 | inode->i_op = &nfs_referral_inode_operations; | |
298 | else | |
299 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 300 | inode->i_fop = NULL; |
c37dcd33 | 301 | set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags); |
55a97593 | 302 | } |
1da177e4 LT |
303 | } else if (S_ISLNK(inode->i_mode)) |
304 | inode->i_op = &nfs_symlink_inode_operations; | |
305 | else | |
306 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
307 | ||
9e6e70f8 TM |
308 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
309 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
310 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
311 | nfsi->change_attr = 0; | |
312 | inode->i_size = 0; | |
313 | inode->i_nlink = 0; | |
314 | inode->i_uid = -2; | |
315 | inode->i_gid = -2; | |
316 | inode->i_blocks = 0; | |
317 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
318 | ||
33801147 | 319 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 320 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
321 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
322 | inode->i_atime = fattr->atime; | |
62ab460c TM |
323 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
324 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
325 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
326 | inode->i_mtime = fattr->mtime; | |
62ab460c TM |
327 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
328 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
329 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
330 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
331 | inode->i_ctime = fattr->ctime; | |
62ab460c TM |
332 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
333 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
334 | | NFS_INO_INVALID_ACCESS | |
335 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 | 336 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
1da177e4 | 337 | nfsi->change_attr = fattr->change_attr; |
62ab460c TM |
338 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
339 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
340 | | NFS_INO_INVALID_DATA; | |
9e6e70f8 TM |
341 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
342 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c TM |
343 | else |
344 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
345 | | NFS_INO_INVALID_DATA | |
346 | | NFS_INO_REVAL_PAGECACHE; | |
9e6e70f8 TM |
347 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
348 | inode->i_nlink = fattr->nlink; | |
62ab460c TM |
349 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
350 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
9e6e70f8 TM |
351 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
352 | inode->i_uid = fattr->uid; | |
62ab460c TM |
353 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
354 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
355 | | NFS_INO_INVALID_ACCESS | |
356 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
357 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
358 | inode->i_gid = fattr->gid; | |
62ab460c TM |
359 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
360 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | |
361 | | NFS_INO_INVALID_ACCESS | |
362 | | NFS_INO_INVALID_ACL; | |
9e6e70f8 TM |
363 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
364 | inode->i_blocks = fattr->du.nfs2.blocks; | |
365 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
366 | /* |
367 | * report the blocks in 512byte units | |
368 | */ | |
369 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
370 | } |
371 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 372 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 373 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 374 | |
ef79c097 DH |
375 | nfs_fscache_init_inode_cookie(inode); |
376 | ||
1da177e4 LT |
377 | unlock_new_inode(inode); |
378 | } else | |
379 | nfs_refresh_inode(inode, fattr); | |
380 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
381 | inode->i_sb->s_id, | |
382 | (long long)NFS_FILEID(inode), | |
383 | atomic_read(&inode->i_count)); | |
384 | ||
385 | out: | |
386 | return inode; | |
387 | ||
388 | out_no_inode: | |
03f28e3a | 389 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
390 | goto out; |
391 | } | |
392 | ||
659bfcd6 | 393 | #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 |
394 | |
395 | int | |
396 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
397 | { | |
398 | struct inode *inode = dentry->d_inode; | |
987f8dfc TM |
399 | struct nfs_fattr *fattr; |
400 | int error = -ENOMEM; | |
1da177e4 | 401 | |
91d5b470 CL |
402 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
403 | ||
188b95dd JL |
404 | /* skip mode change if it's just for clearing setuid/setgid */ |
405 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
406 | attr->ia_valid &= ~ATTR_MODE; | |
407 | ||
1da177e4 LT |
408 | if (attr->ia_valid & ATTR_SIZE) { |
409 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
410 | attr->ia_valid &= ~ATTR_SIZE; | |
411 | } | |
412 | ||
413 | /* Optimization: if the end result is no change, don't RPC */ | |
414 | attr->ia_valid &= NFS_VALID_ATTRS; | |
659bfcd6 | 415 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
1da177e4 LT |
416 | return 0; |
417 | ||
755c1e20 | 418 | /* Write all dirty data */ |
1b924e5f | 419 | if (S_ISREG(inode->i_mode)) |
e1552e19 | 420 | nfs_wb_all(inode); |
987f8dfc TM |
421 | |
422 | fattr = nfs_alloc_fattr(); | |
423 | if (fattr == NULL) | |
424 | goto out; | |
642ac549 TM |
425 | /* |
426 | * Return any delegations if we're going to change ACLs | |
427 | */ | |
428 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
429 | nfs_inode_return_delegation(inode); | |
987f8dfc | 430 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 431 | if (error == 0) |
987f8dfc TM |
432 | nfs_refresh_inode(inode, fattr); |
433 | nfs_free_fattr(fattr); | |
434 | out: | |
65e4308d TM |
435 | return error; |
436 | } | |
437 | ||
a3d01454 TM |
438 | /** |
439 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
440 | * @inode: inode of the file used | |
441 | * @offset: file offset to start truncating | |
442 | * | |
443 | * This is a copy of the common vmtruncate, but with the locking | |
444 | * corrected to take into account the fact that NFS requires | |
445 | * inode->i_size to be updated under the inode->i_lock. | |
446 | */ | |
447 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
448 | { | |
c08d3b0e | 449 | loff_t oldsize; |
450 | int err; | |
a3d01454 | 451 | |
c08d3b0e | 452 | err = inode_newsize_ok(inode, offset); |
453 | if (err) | |
454 | goto out; | |
a3d01454 | 455 | |
c08d3b0e | 456 | spin_lock(&inode->i_lock); |
457 | oldsize = inode->i_size; | |
458 | i_size_write(inode, offset); | |
459 | spin_unlock(&inode->i_lock); | |
460 | ||
461 | truncate_pagecache(inode, oldsize, offset); | |
462 | out: | |
463 | return err; | |
a3d01454 TM |
464 | } |
465 | ||
65e4308d TM |
466 | /** |
467 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
468 | * @inode: pointer to struct inode | |
469 | * @attr: pointer to struct iattr | |
470 | * | |
471 | * Note: we do this in the *proc.c in order to ensure that | |
472 | * it works for things like exclusive creates too. | |
473 | */ | |
474 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
475 | { | |
476 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 477 | spin_lock(&inode->i_lock); |
1da177e4 | 478 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
479 | int mode = attr->ia_mode & S_IALLUGO; |
480 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
481 | inode->i_mode = mode; |
482 | } | |
483 | if ((attr->ia_valid & ATTR_UID) != 0) | |
484 | inode->i_uid = attr->ia_uid; | |
485 | if ((attr->ia_valid & ATTR_GID) != 0) | |
486 | inode->i_gid = attr->ia_gid; | |
55296809 | 487 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 488 | spin_unlock(&inode->i_lock); |
65e4308d TM |
489 | } |
490 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 491 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 492 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 493 | } |
1da177e4 LT |
494 | } |
495 | ||
1da177e4 LT |
496 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
497 | { | |
498 | struct inode *inode = dentry->d_inode; | |
55296809 | 499 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
500 | int err; |
501 | ||
acdc53b2 | 502 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 503 | if (S_ISREG(inode->i_mode)) { |
acdc53b2 TM |
504 | err = filemap_write_and_wait(inode->i_mapping); |
505 | if (err) | |
506 | goto out; | |
28c494c5 | 507 | } |
fc33a7bb CH |
508 | |
509 | /* | |
510 | * We may force a getattr if the user cares about atime. | |
511 | * | |
512 | * Note that we only have to check the vfsmount flags here: | |
513 | * - NFS always sets S_NOATIME by so checking it would give a | |
514 | * bogus result | |
515 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
516 | * no point in checking those. | |
517 | */ | |
518 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
519 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 520 | need_atime = 0; |
fc33a7bb | 521 | |
1da177e4 LT |
522 | if (need_atime) |
523 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
524 | else | |
525 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 526 | if (!err) { |
1da177e4 | 527 | generic_fillattr(inode, stat); |
f43bf0be | 528 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 529 | } |
acdc53b2 | 530 | out: |
1da177e4 LT |
531 | return err; |
532 | } | |
533 | ||
f11ac8db TM |
534 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
535 | { | |
536 | atomic_set(&l_ctx->count, 1); | |
537 | l_ctx->lockowner = current->files; | |
538 | l_ctx->pid = current->tgid; | |
539 | INIT_LIST_HEAD(&l_ctx->list); | |
540 | } | |
541 | ||
542 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
543 | { | |
544 | struct nfs_lock_context *pos; | |
545 | ||
546 | list_for_each_entry(pos, &ctx->lock_context.list, list) { | |
547 | if (pos->lockowner != current->files) | |
548 | continue; | |
549 | if (pos->pid != current->tgid) | |
550 | continue; | |
551 | atomic_inc(&pos->count); | |
552 | return pos; | |
553 | } | |
554 | return NULL; | |
555 | } | |
556 | ||
557 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
558 | { | |
559 | struct nfs_lock_context *res, *new = NULL; | |
560 | struct inode *inode = ctx->path.dentry->d_inode; | |
561 | ||
562 | spin_lock(&inode->i_lock); | |
563 | res = __nfs_find_lock_context(ctx); | |
564 | if (res == NULL) { | |
565 | spin_unlock(&inode->i_lock); | |
566 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
567 | if (new == NULL) | |
568 | return NULL; | |
569 | nfs_init_lock_context(new); | |
570 | spin_lock(&inode->i_lock); | |
571 | res = __nfs_find_lock_context(ctx); | |
572 | if (res == NULL) { | |
573 | list_add_tail(&new->list, &ctx->lock_context.list); | |
574 | new->open_context = ctx; | |
575 | res = new; | |
576 | new = NULL; | |
577 | } | |
578 | } | |
579 | spin_unlock(&inode->i_lock); | |
580 | kfree(new); | |
581 | return res; | |
582 | } | |
583 | ||
584 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
585 | { | |
586 | struct nfs_open_context *ctx = l_ctx->open_context; | |
587 | struct inode *inode = ctx->path.dentry->d_inode; | |
588 | ||
589 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
590 | return; | |
591 | list_del(&l_ctx->list); | |
592 | spin_unlock(&inode->i_lock); | |
593 | kfree(l_ctx); | |
594 | } | |
595 | ||
7fe5c398 TM |
596 | /** |
597 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
598 | * @ctx: pointer to context | |
599 | * @is_sync: is this a synchronous close | |
600 | * | |
601 | * always ensure that the attributes are up to date if we're mounted | |
602 | * with close-to-open semantics | |
603 | */ | |
604 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
605 | { | |
606 | struct inode *inode; | |
607 | struct nfs_server *server; | |
608 | ||
609 | if (!(ctx->mode & FMODE_WRITE)) | |
610 | return; | |
611 | if (!is_sync) | |
612 | return; | |
613 | inode = ctx->path.dentry->d_inode; | |
614 | if (!list_empty(&NFS_I(inode)->open_files)) | |
615 | return; | |
616 | server = NFS_SERVER(inode); | |
617 | if (server->flags & NFS_MOUNT_NOCTO) | |
618 | return; | |
619 | nfs_revalidate_inode(server, inode); | |
620 | } | |
621 | ||
cd9a1c0e | 622 | struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode) |
1da177e4 LT |
623 | { |
624 | struct nfs_open_context *ctx; | |
625 | ||
f52720ca | 626 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
1da177e4 | 627 | if (ctx != NULL) { |
6eae7974 AV |
628 | ctx->path = *path; |
629 | path_get(&ctx->path); | |
1da177e4 LT |
630 | ctx->cred = get_rpccred(cred); |
631 | ctx->state = NULL; | |
cd9a1c0e | 632 | ctx->mode = f_mode; |
66d3aac0 | 633 | ctx->flags = 0; |
1da177e4 | 634 | ctx->error = 0; |
00a92642 | 635 | ctx->dir_cookie = 0; |
f11ac8db TM |
636 | nfs_init_lock_context(&ctx->lock_context); |
637 | ctx->lock_context.open_context = ctx; | |
5c78f58e | 638 | INIT_LIST_HEAD(&ctx->list); |
1da177e4 LT |
639 | } |
640 | return ctx; | |
641 | } | |
642 | ||
643 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
644 | { | |
645 | if (ctx != NULL) | |
f11ac8db | 646 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
647 | return ctx; |
648 | } | |
649 | ||
7fe5c398 | 650 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 651 | { |
7fe5c398 | 652 | struct inode *inode = ctx->path.dentry->d_inode; |
3bec63db | 653 | |
5c78f58e | 654 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
655 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
656 | return; | |
657 | list_del(&ctx->list); | |
658 | spin_unlock(&inode->i_lock); | |
ef84303e | 659 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 660 | return; |
5c78f58e TM |
661 | if (inode != NULL) |
662 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
663 | if (ctx->cred != NULL) |
664 | put_rpccred(ctx->cred); | |
31f31db1 | 665 | path_put(&ctx->path); |
3bec63db TM |
666 | kfree(ctx); |
667 | } | |
668 | ||
a49c3c77 TM |
669 | void put_nfs_open_context(struct nfs_open_context *ctx) |
670 | { | |
671 | __put_nfs_open_context(ctx, 0); | |
672 | } | |
673 | ||
1da177e4 LT |
674 | /* |
675 | * Ensure that mmap has a recent RPC credential for use when writing out | |
676 | * shared pages | |
677 | */ | |
cd9a1c0e | 678 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 679 | { |
01cce933 | 680 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
681 | struct nfs_inode *nfsi = NFS_I(inode); |
682 | ||
683 | filp->private_data = get_nfs_open_context(ctx); | |
684 | spin_lock(&inode->i_lock); | |
685 | list_add(&ctx->list, &nfsi->open_files); | |
686 | spin_unlock(&inode->i_lock); | |
687 | } | |
688 | ||
d530838b TM |
689 | /* |
690 | * Given an inode, search for an open context with the desired characteristics | |
691 | */ | |
dc0b027d | 692 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
693 | { |
694 | struct nfs_inode *nfsi = NFS_I(inode); | |
695 | struct nfs_open_context *pos, *ctx = NULL; | |
696 | ||
697 | spin_lock(&inode->i_lock); | |
698 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
699 | if (cred != NULL && pos->cred != cred) |
700 | continue; | |
1544fa0f TM |
701 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
702 | continue; | |
703 | ctx = get_nfs_open_context(pos); | |
704 | break; | |
1da177e4 LT |
705 | } |
706 | spin_unlock(&inode->i_lock); | |
707 | return ctx; | |
708 | } | |
709 | ||
b92dccf6 | 710 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 711 | { |
01cce933 | 712 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 713 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
714 | |
715 | if (ctx) { | |
716 | filp->private_data = NULL; | |
717 | spin_lock(&inode->i_lock); | |
718 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
719 | spin_unlock(&inode->i_lock); | |
f895c53f | 720 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
1da177e4 LT |
721 | } |
722 | } | |
723 | ||
724 | /* | |
725 | * These allocate and release file read/write context information. | |
726 | */ | |
727 | int nfs_open(struct inode *inode, struct file *filp) | |
728 | { | |
729 | struct nfs_open_context *ctx; | |
730 | struct rpc_cred *cred; | |
731 | ||
98a8e323 | 732 | cred = rpc_lookup_cred(); |
1da177e4 LT |
733 | if (IS_ERR(cred)) |
734 | return PTR_ERR(cred); | |
cd9a1c0e | 735 | ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode); |
1da177e4 LT |
736 | put_rpccred(cred); |
737 | if (ctx == NULL) | |
738 | return -ENOMEM; | |
1da177e4 LT |
739 | nfs_file_set_open_context(filp, ctx); |
740 | put_nfs_open_context(ctx); | |
ef79c097 | 741 | nfs_fscache_set_inode_cookie(inode, filp); |
1da177e4 LT |
742 | return 0; |
743 | } | |
744 | ||
745 | int nfs_release(struct inode *inode, struct file *filp) | |
746 | { | |
1da177e4 LT |
747 | nfs_file_clear_open_context(filp); |
748 | return 0; | |
749 | } | |
750 | ||
751 | /* | |
752 | * This function is called whenever some part of NFS notices that | |
753 | * the cached attributes have to be refreshed. | |
754 | */ | |
755 | int | |
756 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
757 | { | |
758 | int status = -ESTALE; | |
a3cba2aa | 759 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 760 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
761 | |
762 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
763 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
764 | ||
85233a7a | 765 | if (is_bad_inode(inode)) |
691beb13 | 766 | goto out; |
1da177e4 | 767 | if (NFS_STALE(inode)) |
412d582e | 768 | goto out; |
7fdc49c4 | 769 | |
a3cba2aa TM |
770 | status = -ENOMEM; |
771 | fattr = nfs_alloc_fattr(); | |
772 | if (fattr == NULL) | |
773 | goto out; | |
774 | ||
691beb13 | 775 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
a3cba2aa | 776 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
1da177e4 LT |
777 | if (status != 0) { |
778 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
779 | inode->i_sb->s_id, | |
780 | (long long)NFS_FILEID(inode), status); | |
781 | if (status == -ESTALE) { | |
782 | nfs_zap_caches(inode); | |
783 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 784 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
785 | } |
786 | goto out; | |
787 | } | |
788 | ||
a3cba2aa | 789 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 LT |
790 | if (status) { |
791 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
792 | inode->i_sb->s_id, | |
793 | (long long)NFS_FILEID(inode), status); | |
794 | goto out; | |
795 | } | |
55296809 | 796 | |
24aa1fe6 | 797 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 798 | nfs_zap_acl_cache(inode); |
55296809 | 799 | |
1da177e4 LT |
800 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
801 | inode->i_sb->s_id, | |
802 | (long long)NFS_FILEID(inode)); | |
803 | ||
412d582e | 804 | out: |
a3cba2aa | 805 | nfs_free_fattr(fattr); |
1da177e4 LT |
806 | return status; |
807 | } | |
808 | ||
809 | int nfs_attribute_timeout(struct inode *inode) | |
810 | { | |
811 | struct nfs_inode *nfsi = NFS_I(inode); | |
812 | ||
d7cf8dd0 TM |
813 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
814 | } | |
815 | ||
816 | static int nfs_attribute_cache_expired(struct inode *inode) | |
817 | { | |
b4d2314b | 818 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 819 | return 0; |
d7cf8dd0 | 820 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
821 | } |
822 | ||
823 | /** | |
824 | * nfs_revalidate_inode - Revalidate the inode attributes | |
825 | * @server - pointer to nfs_server struct | |
826 | * @inode - pointer to inode struct | |
827 | * | |
828 | * Updates inode attribute information by retrieving the data from the server. | |
829 | */ | |
830 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
831 | { | |
44b11874 | 832 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
d7cf8dd0 | 833 | && !nfs_attribute_cache_expired(inode)) |
1da177e4 LT |
834 | return NFS_STALE(inode) ? -ESTALE : 0; |
835 | return __nfs_revalidate_inode(server, inode); | |
836 | } | |
837 | ||
1cda707d | 838 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
839 | { |
840 | struct nfs_inode *nfsi = NFS_I(inode); | |
841 | ||
842 | if (mapping->nrpages != 0) { | |
843 | int ret = invalidate_inode_pages2(mapping); | |
844 | if (ret < 0) | |
845 | return ret; | |
846 | } | |
847 | spin_lock(&inode->i_lock); | |
848 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 849 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 850 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
851 | spin_unlock(&inode->i_lock); |
852 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
ef79c097 | 853 | nfs_fscache_reset_inode_cookie(inode); |
717d44e8 TM |
854 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
855 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
856 | return 0; | |
857 | } | |
858 | ||
717d44e8 TM |
859 | /** |
860 | * nfs_revalidate_mapping - Revalidate the pagecache | |
861 | * @inode - pointer to host inode | |
862 | * @mapping - pointer to mapping | |
717d44e8 TM |
863 | */ |
864 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
865 | { | |
866 | struct nfs_inode *nfsi = NFS_I(inode); | |
867 | int ret = 0; | |
dc59250c | 868 | |
717d44e8 | 869 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
d7cf8dd0 TM |
870 | || nfs_attribute_cache_expired(inode) |
871 | || NFS_STALE(inode)) { | |
717d44e8 TM |
872 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
873 | if (ret < 0) | |
874 | goto out; | |
7d52e862 | 875 | } |
717d44e8 TM |
876 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
877 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 878 | out: |
44b11874 | 879 | return ret; |
7d52e862 TM |
880 | } |
881 | ||
a895b4a1 TM |
882 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
883 | { | |
884 | struct nfs_inode *nfsi = NFS_I(inode); | |
885 | ||
9e6e70f8 TM |
886 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
887 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
888 | && nfsi->change_attr == fattr->pre_change_attr) { | |
70ca8852 TM |
889 | nfsi->change_attr = fattr->change_attr; |
890 | if (S_ISDIR(inode->i_mode)) | |
891 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
892 | } | |
a895b4a1 | 893 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
894 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
895 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
896 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) | |
a895b4a1 | 897 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
9e6e70f8 TM |
898 | |
899 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
900 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
901 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
a895b4a1 | 902 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
e323ea46 TM |
903 | if (S_ISDIR(inode->i_mode)) |
904 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
a895b4a1 | 905 | } |
9e6e70f8 TM |
906 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
907 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
908 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
909 | && nfsi->npages == 0) | |
910 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
a895b4a1 TM |
911 | } |
912 | ||
1da177e4 | 913 | /** |
33801147 | 914 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
915 | * @inode - pointer to inode |
916 | * @fattr - updated attributes | |
917 | * | |
918 | * Verifies the attribute cache. If we have just changed the attributes, | |
919 | * so that fattr carries weak cache consistency data, then it may | |
920 | * also update the ctime/mtime/change_attribute. | |
921 | */ | |
33801147 | 922 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
923 | { |
924 | struct nfs_inode *nfsi = NFS_I(inode); | |
925 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 926 | unsigned long invalid = 0; |
1da177e4 | 927 | |
dc59250c | 928 | |
ca62b9c3 | 929 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
930 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
931 | return -EIO; | |
932 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 933 | return -EIO; |
ca62b9c3 | 934 | |
9e6e70f8 | 935 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
f1bb0b92 | 936 | nfsi->change_attr != fattr->change_attr) |
2a3f5fd4 | 937 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 938 | |
1da177e4 | 939 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 940 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
2a3f5fd4 | 941 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
ca62b9c3 | 942 | |
9e6e70f8 TM |
943 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
944 | cur_size = i_size_read(inode); | |
945 | new_isize = nfs_size_to_loff_t(fattr->size); | |
946 | if (cur_size != new_isize && nfsi->npages == 0) | |
947 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
948 | } | |
1da177e4 LT |
949 | |
950 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
951 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
952 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
953 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
954 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
955 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 956 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
957 | |
958 | /* Has the link count changed? */ | |
9e6e70f8 | 959 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 960 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 961 | |
9e6e70f8 | 962 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
963 | invalid |= NFS_INO_INVALID_ATIME; |
964 | ||
965 | if (invalid != 0) | |
966 | nfsi->cache_validity |= invalid; | |
1da177e4 | 967 | |
33801147 | 968 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
969 | return 0; |
970 | } | |
971 | ||
a10ad176 | 972 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 973 | { |
9e6e70f8 TM |
974 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
975 | return 0; | |
a10ad176 TM |
976 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
977 | } | |
978 | ||
979 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
980 | { | |
9e6e70f8 TM |
981 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
982 | return 0; | |
a10ad176 TM |
983 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
984 | } | |
870a5be8 | 985 | |
ae05f269 | 986 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
987 | |
988 | static unsigned long nfs_read_attr_generation_counter(void) | |
989 | { | |
ae05f269 | 990 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
991 | } |
992 | ||
993 | unsigned long nfs_inc_attr_generation_counter(void) | |
994 | { | |
ae05f269 | 995 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
996 | } |
997 | ||
998 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
999 | { | |
1000 | fattr->valid = 0; | |
1001 | fattr->time_start = jiffies; | |
1002 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1003 | } | |
1004 | ||
2d36bfde TM |
1005 | struct nfs_fattr *nfs_alloc_fattr(void) |
1006 | { | |
1007 | struct nfs_fattr *fattr; | |
1008 | ||
1009 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1010 | if (fattr != NULL) | |
1011 | nfs_fattr_init(fattr); | |
1012 | return fattr; | |
1013 | } | |
1014 | ||
1015 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1016 | { | |
1017 | struct nfs_fh *fh; | |
1018 | ||
1019 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1020 | if (fh != NULL) | |
1021 | fh->size = 0; | |
1022 | return fh; | |
1023 | } | |
1024 | ||
a10ad176 TM |
1025 | /** |
1026 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1027 | * @inode - pointer to inode | |
1028 | * @fattr - attributes | |
1029 | * | |
1030 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1031 | * attributes got scheduled after another call carrying updated ones. | |
1032 | * | |
1033 | * To do so, the function first assumes that a more recent ctime means | |
1034 | * that the attributes in fattr are newer, however it also attempt to | |
1035 | * catch the case where ctime either didn't change, or went backwards | |
1036 | * (if someone reset the clock on the server) by looking at whether | |
1037 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1038 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1039 | * |
1040 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1041 | * more recent than the ones cached in the inode. | |
1042 | * | |
1043 | */ | |
1044 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1045 | { | |
1046 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1047 | ||
4704f0e2 | 1048 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1049 | nfs_ctime_need_update(inode, fattr) || |
1050 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1051 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1052 | } |
1053 | ||
1054 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1055 | { | |
1056 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1057 | return nfs_update_inode(inode, fattr); |
1058 | return nfs_check_inode_attributes(inode, fattr); | |
1059 | } | |
1060 | ||
33801147 TM |
1061 | /** |
1062 | * nfs_refresh_inode - try to update the inode attribute cache | |
1063 | * @inode - pointer to inode | |
1064 | * @fattr - updated attributes | |
1065 | * | |
1066 | * Check that an RPC call that returned attributes has not overlapped with | |
1067 | * other recent updates of the inode metadata, then decide whether it is | |
1068 | * safe to do a full update of the inode attributes, or whether just to | |
1069 | * call nfs_check_inode_attributes. | |
1070 | */ | |
1071 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1072 | { | |
33801147 TM |
1073 | int status; |
1074 | ||
1075 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1076 | return 0; | |
1077 | spin_lock(&inode->i_lock); | |
870a5be8 | 1078 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1079 | spin_unlock(&inode->i_lock); |
ef79c097 | 1080 | |
33801147 TM |
1081 | return status; |
1082 | } | |
1083 | ||
d65f557f TM |
1084 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1085 | { | |
1086 | struct nfs_inode *nfsi = NFS_I(inode); | |
1087 | ||
1088 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1089 | if (S_ISDIR(inode->i_mode)) | |
1090 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1091 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1092 | return 0; | |
1093 | return nfs_refresh_inode_locked(inode, fattr); | |
1094 | } | |
1095 | ||
decf491f TM |
1096 | /** |
1097 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1098 | * @inode - pointer to inode | |
1099 | * @fattr - updated attributes | |
1100 | * | |
1101 | * After an operation that has changed the inode metadata, mark the | |
1102 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1103 | * |
1104 | * NB: if the server didn't return any post op attributes, this | |
1105 | * function will force the retrieval of attributes before the next | |
1106 | * NFS request. Thus it should be used only for operations that | |
1107 | * are expected to change one or more attributes, to avoid | |
1108 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1109 | */ |
1110 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1111 | { | |
d65f557f | 1112 | int status; |
decf491f | 1113 | |
7668fdbe | 1114 | spin_lock(&inode->i_lock); |
d65f557f | 1115 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1116 | spin_unlock(&inode->i_lock); |
870a5be8 | 1117 | return status; |
decf491f TM |
1118 | } |
1119 | ||
70ca8852 TM |
1120 | /** |
1121 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1122 | * @inode - pointer to inode | |
1123 | * @fattr - updated attributes | |
1124 | * | |
1125 | * After an operation that has changed the inode metadata, mark the | |
1126 | * attribute cache as being invalid, then try to update it. Fake up | |
1127 | * weak cache consistency data, if none exist. | |
1128 | * | |
1129 | * This function is mainly designed to be used by the ->write_done() functions. | |
1130 | */ | |
1131 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1132 | { | |
d65f557f TM |
1133 | int status; |
1134 | ||
1135 | spin_lock(&inode->i_lock); | |
1136 | /* Don't do a WCC update if these attributes are already stale */ | |
1137 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1138 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1139 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1140 | | NFS_ATTR_FATTR_PRESIZE | |
1141 | | NFS_ATTR_FATTR_PREMTIME | |
1142 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1143 | goto out_noforce; |
1144 | } | |
9e6e70f8 TM |
1145 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1146 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
70ca8852 | 1147 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
9e6e70f8 | 1148 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1149 | } |
9e6e70f8 TM |
1150 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1151 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1152 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1153 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1154 | } | |
1155 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1156 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1157 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1158 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1159 | } | |
1160 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1161 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1162 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1163 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1164 | } |
d65f557f TM |
1165 | out_noforce: |
1166 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1167 | spin_unlock(&inode->i_lock); | |
1168 | return status; | |
70ca8852 TM |
1169 | } |
1170 | ||
1da177e4 LT |
1171 | /* |
1172 | * Many nfs protocol calls return the new file attributes after | |
1173 | * an operation. Here we update the inode to reflect the state | |
1174 | * of the server's inode. | |
1175 | * | |
1176 | * This is a bit tricky because we have to make sure all dirty pages | |
1177 | * have been sent off to the server before calling invalidate_inode_pages. | |
1178 | * To make sure no other process adds more write requests while we try | |
1179 | * our best to flush them, we make them sleep during the attribute refresh. | |
1180 | * | |
1181 | * A very similar scenario holds for the dir cache. | |
1182 | */ | |
24aa1fe6 | 1183 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1184 | { |
8b4bdcf8 | 1185 | struct nfs_server *server; |
1da177e4 | 1186 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1187 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1188 | unsigned long invalid = 0; |
3e7d950a | 1189 | unsigned long now = jiffies; |
62ab460c | 1190 | unsigned long save_cache_validity; |
1da177e4 LT |
1191 | |
1192 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
3110ff80 | 1193 | __func__, inode->i_sb->s_id, inode->i_ino, |
1da177e4 LT |
1194 | atomic_read(&inode->i_count), fattr->valid); |
1195 | ||
9e6e70f8 | 1196 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
325cfed9 | 1197 | goto out_fileid; |
1da177e4 LT |
1198 | |
1199 | /* | |
1200 | * Make sure the inode's type hasn't changed. | |
1201 | */ | |
9e6e70f8 | 1202 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1203 | goto out_changed; |
1204 | ||
8b4bdcf8 | 1205 | server = NFS_SERVER(inode); |
a0356862 | 1206 | /* Update the fsid? */ |
9e6e70f8 | 1207 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 TM |
1208 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
1209 | !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags)) | |
8b4bdcf8 TM |
1210 | server->fsid = fattr->fsid; |
1211 | ||
1da177e4 LT |
1212 | /* |
1213 | * Update the read time so we don't revalidate too often. | |
1214 | */ | |
33801147 | 1215 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1216 | |
62ab460c TM |
1217 | save_cache_validity = nfsi->cache_validity; |
1218 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1219 | | NFS_INO_INVALID_ATIME | |
1220 | | NFS_INO_REVAL_FORCED | |
1221 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1222 | |
a895b4a1 TM |
1223 | /* Do atomic weak cache consistency updates */ |
1224 | nfs_wcc_update_inode(inode, fattr); | |
1225 | ||
47aabaa7 | 1226 | /* More cache consistency checks */ |
9e6e70f8 TM |
1227 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
1228 | if (nfsi->change_attr != fattr->change_attr) { | |
1229 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
1230 | inode->i_sb->s_id, inode->i_ino); | |
1231 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1232 | if (S_ISDIR(inode->i_mode)) | |
1233 | nfs_force_lookup_revalidate(inode); | |
1234 | nfsi->change_attr = fattr->change_attr; | |
1235 | } | |
62ab460c TM |
1236 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
1237 | invalid |= save_cache_validity; | |
9e6e70f8 TM |
1238 | |
1239 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
47aabaa7 TM |
1240 | /* NFSv2/v3: Check if the mtime agrees */ |
1241 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { | |
1242 | dprintk("NFS: mtime change on server for file %s/%ld\n", | |
1243 | inode->i_sb->s_id, inode->i_ino); | |
1244 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
bfc69a45 TM |
1245 | if (S_ISDIR(inode->i_mode)) |
1246 | nfs_force_lookup_revalidate(inode); | |
9e6e70f8 | 1247 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
47aabaa7 | 1248 | } |
62ab460c TM |
1249 | } else if (server->caps & NFS_CAP_MTIME) |
1250 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1251 | | NFS_INO_INVALID_DATA | |
1252 | | NFS_INO_REVAL_PAGECACHE | |
1253 | | NFS_INO_REVAL_FORCED); | |
1254 | ||
9e6e70f8 | 1255 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
47aabaa7 | 1256 | /* If ctime has changed we should definitely clear access+acl caches */ |
37d9d76d | 1257 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
4704f0e2 | 1258 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
37d9d76d N |
1259 | /* and probably clear data for a directory too as utimes can cause |
1260 | * havoc with our cache. | |
1261 | */ | |
1262 | if (S_ISDIR(inode->i_mode)) { | |
1263 | invalid |= NFS_INO_INVALID_DATA; | |
1264 | nfs_force_lookup_revalidate(inode); | |
1265 | } | |
9e6e70f8 | 1266 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
37d9d76d | 1267 | } |
62ab460c TM |
1268 | } else if (server->caps & NFS_CAP_CTIME) |
1269 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1270 | | NFS_INO_INVALID_ACCESS | |
1271 | | NFS_INO_INVALID_ACL | |
1272 | | NFS_INO_REVAL_FORCED); | |
47aabaa7 | 1273 | |
951a143b | 1274 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1275 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1276 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1277 | cur_isize = i_size_read(inode); | |
1278 | if (new_isize != cur_isize) { | |
1279 | /* Do we perhaps have any outstanding writes, or has | |
1280 | * the file grown beyond our last write? */ | |
1281 | if (nfsi->npages == 0 || new_isize > cur_isize) { | |
1282 | i_size_write(inode, new_isize); | |
1283 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1284 | } | |
1285 | dprintk("NFS: isize change on server for file %s/%ld\n", | |
1286 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 | 1287 | } |
62ab460c TM |
1288 | } else |
1289 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1290 | | NFS_INO_REVAL_PAGECACHE | |
1291 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1292 | |
1da177e4 | 1293 | |
9e6e70f8 TM |
1294 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1295 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
62ab460c TM |
1296 | else if (server->caps & NFS_CAP_ATIME) |
1297 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME | |
1298 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1299 | |
9e6e70f8 TM |
1300 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1301 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1302 | umode_t newmode = inode->i_mode & S_IFMT; |
1303 | newmode |= fattr->mode & S_IALLUGO; | |
1304 | inode->i_mode = newmode; | |
9e6e70f8 | 1305 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1306 | } |
62ab460c TM |
1307 | } else if (server->caps & NFS_CAP_MODE) |
1308 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1309 | | NFS_INO_INVALID_ACCESS | |
1310 | | NFS_INO_INVALID_ACL | |
1311 | | NFS_INO_REVAL_FORCED); | |
1312 | ||
9e6e70f8 TM |
1313 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
1314 | if (inode->i_uid != fattr->uid) { | |
1315 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1316 | inode->i_uid = fattr->uid; | |
1317 | } | |
62ab460c TM |
1318 | } else if (server->caps & NFS_CAP_OWNER) |
1319 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1320 | | NFS_INO_INVALID_ACCESS | |
1321 | | NFS_INO_INVALID_ACL | |
1322 | | NFS_INO_REVAL_FORCED); | |
1323 | ||
9e6e70f8 TM |
1324 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
1325 | if (inode->i_gid != fattr->gid) { | |
1326 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1327 | inode->i_gid = fattr->gid; | |
1328 | } | |
62ab460c TM |
1329 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
1330 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1331 | | NFS_INO_INVALID_ACCESS | |
1332 | | NFS_INO_INVALID_ACL | |
1333 | | NFS_INO_REVAL_FORCED); | |
921615f1 | 1334 | |
9e6e70f8 TM |
1335 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1336 | if (inode->i_nlink != fattr->nlink) { | |
1337 | invalid |= NFS_INO_INVALID_ATTR; | |
1338 | if (S_ISDIR(inode->i_mode)) | |
1339 | invalid |= NFS_INO_INVALID_DATA; | |
1340 | inode->i_nlink = fattr->nlink; | |
1341 | } | |
62ab460c TM |
1342 | } else if (server->caps & NFS_CAP_NLINK) |
1343 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR | |
1344 | | NFS_INO_REVAL_FORCED); | |
1da177e4 | 1345 | |
9e6e70f8 | 1346 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1347 | /* |
1348 | * report the blocks in 512byte units | |
1349 | */ | |
1350 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1351 | } |
9e6e70f8 TM |
1352 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1353 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1354 | |
1355 | /* Update attrtimeo value if we're out of the unstable period */ | |
1356 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1357 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1358 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1359 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1360 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1361 | } else { |
64672d55 | 1362 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1363 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1364 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1365 | nfsi->attrtimeo_timestamp = now; | |
1366 | } | |
1da177e4 | 1367 | } |
f2115dc9 | 1368 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1369 | /* Don't invalidate the data if we were to blame */ |
1370 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1371 | || S_ISLNK(inode->i_mode))) | |
1372 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce | 1373 | if (!nfs_have_delegation(inode, FMODE_READ) || |
62ab460c | 1374 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
55296809 | 1375 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1376 | |
1377 | return 0; | |
1378 | out_changed: | |
1379 | /* | |
1380 | * Big trouble! The inode has become a different object. | |
1381 | */ | |
1da177e4 | 1382 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
3110ff80 | 1383 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
b37b03b7 | 1384 | out_err: |
1da177e4 LT |
1385 | /* |
1386 | * No need to worry about unhashing the dentry, as the | |
1387 | * lookup validation will know that the inode is bad. | |
1388 | * (But we fall through to invalidate the caches.) | |
1389 | */ | |
1390 | nfs_invalidate_inode(inode); | |
1da177e4 | 1391 | return -ESTALE; |
325cfed9 CL |
1392 | |
1393 | out_fileid: | |
1394 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1395 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
54ceac45 | 1396 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
325cfed9 CL |
1397 | (long long)nfsi->fileid, (long long)fattr->fileid); |
1398 | goto out_err; | |
1da177e4 LT |
1399 | } |
1400 | ||
55a97593 | 1401 | |
1da177e4 LT |
1402 | #ifdef CONFIG_NFS_V4 |
1403 | ||
1da177e4 LT |
1404 | /* |
1405 | * Clean out any remaining NFSv4 state that might be left over due | |
1406 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1407 | * nfs_open(). | |
1408 | */ | |
b57922d9 | 1409 | void nfs4_evict_inode(struct inode *inode) |
1da177e4 | 1410 | { |
b57922d9 AV |
1411 | truncate_inode_pages(&inode->i_data, 0); |
1412 | end_writeback(inode); | |
1da177e4 | 1413 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1414 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1415 | /* First call standard NFS clear_inode() code */ |
1416 | nfs_clear_inode(inode); | |
1da177e4 | 1417 | } |
1da177e4 LT |
1418 | #endif |
1419 | ||
f7b422b1 | 1420 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1421 | { |
1422 | struct nfs_inode *nfsi; | |
e94b1766 | 1423 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1424 | if (!nfsi) |
1425 | return NULL; | |
55296809 CL |
1426 | nfsi->flags = 0UL; |
1427 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1428 | #ifdef CONFIG_NFS_V3_ACL |
1429 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1430 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1431 | #endif | |
e50a1c2e BF |
1432 | #ifdef CONFIG_NFS_V4 |
1433 | nfsi->nfs4_acl = NULL; | |
1434 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1435 | return &nfsi->vfs_inode; |
1436 | } | |
1437 | ||
f7b422b1 | 1438 | void nfs_destroy_inode(struct inode *inode) |
1da177e4 LT |
1439 | { |
1440 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
1441 | } | |
1442 | ||
d75d5414 AM |
1443 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1444 | { | |
1445 | #ifdef CONFIG_NFS_V4 | |
1446 | INIT_LIST_HEAD(&nfsi->open_states); | |
1447 | nfsi->delegation = NULL; | |
1448 | nfsi->delegation_state = 0; | |
1449 | init_rwsem(&nfsi->rwsem); | |
1450 | #endif | |
1451 | } | |
f7b422b1 | 1452 | |
51cc5068 | 1453 | static void init_once(void *foo) |
1da177e4 LT |
1454 | { |
1455 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1456 | ||
a35afb83 | 1457 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1458 | INIT_LIST_HEAD(&nfsi->open_files); |
1459 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1460 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
1461 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
a35afb83 | 1462 | nfsi->npages = 0; |
ff778d02 | 1463 | nfsi->ncommit = 0; |
565277f6 TM |
1464 | atomic_set(&nfsi->silly_count, 1); |
1465 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1466 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1467 | nfs4_init_once(nfsi); |
1da177e4 | 1468 | } |
20c2df83 | 1469 | |
f7b422b1 | 1470 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1471 | { |
1472 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1473 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1474 | 0, (SLAB_RECLAIM_ACCOUNT| |
1475 | SLAB_MEM_SPREAD), | |
20c2df83 | 1476 | init_once); |
1da177e4 LT |
1477 | if (nfs_inode_cachep == NULL) |
1478 | return -ENOMEM; | |
1479 | ||
1480 | return 0; | |
1481 | } | |
1482 | ||
266bee88 | 1483 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1484 | { |
1a1d92c1 | 1485 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1486 | } |
1487 | ||
5746006f TM |
1488 | struct workqueue_struct *nfsiod_workqueue; |
1489 | ||
1490 | /* | |
1491 | * start up the nfsiod workqueue | |
1492 | */ | |
1493 | static int nfsiod_start(void) | |
1494 | { | |
1495 | struct workqueue_struct *wq; | |
1496 | dprintk("RPC: creating workqueue nfsiod\n"); | |
60958892 | 1497 | wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0); |
5746006f TM |
1498 | if (wq == NULL) |
1499 | return -ENOMEM; | |
1500 | nfsiod_workqueue = wq; | |
1501 | return 0; | |
1502 | } | |
1503 | ||
1504 | /* | |
1505 | * Destroy the nfsiod workqueue | |
1506 | */ | |
1507 | static void nfsiod_stop(void) | |
1508 | { | |
1509 | struct workqueue_struct *wq; | |
1510 | ||
1511 | wq = nfsiod_workqueue; | |
1512 | if (wq == NULL) | |
1513 | return; | |
1514 | nfsiod_workqueue = NULL; | |
1515 | destroy_workqueue(wq); | |
1516 | } | |
1517 | ||
1da177e4 LT |
1518 | /* |
1519 | * Initialize NFS | |
1520 | */ | |
1521 | static int __init init_nfs_fs(void) | |
1522 | { | |
1523 | int err; | |
1524 | ||
955a857e BS |
1525 | err = nfs_idmap_init(); |
1526 | if (err < 0) | |
1527 | goto out9; | |
1528 | ||
e571cbf1 TM |
1529 | err = nfs_dns_resolver_init(); |
1530 | if (err < 0) | |
1531 | goto out8; | |
1532 | ||
8ec442ae DH |
1533 | err = nfs_fscache_register(); |
1534 | if (err < 0) | |
1535 | goto out7; | |
1536 | ||
5746006f TM |
1537 | err = nfsiod_start(); |
1538 | if (err) | |
1539 | goto out6; | |
1540 | ||
6aaca566 DH |
1541 | err = nfs_fs_proc_init(); |
1542 | if (err) | |
1543 | goto out5; | |
1544 | ||
1da177e4 LT |
1545 | err = nfs_init_nfspagecache(); |
1546 | if (err) | |
1547 | goto out4; | |
1548 | ||
1549 | err = nfs_init_inodecache(); | |
1550 | if (err) | |
1551 | goto out3; | |
1552 | ||
1553 | err = nfs_init_readpagecache(); | |
1554 | if (err) | |
1555 | goto out2; | |
1556 | ||
1557 | err = nfs_init_writepagecache(); | |
1558 | if (err) | |
1559 | goto out1; | |
1560 | ||
1da177e4 LT |
1561 | err = nfs_init_directcache(); |
1562 | if (err) | |
1563 | goto out0; | |
1da177e4 LT |
1564 | |
1565 | #ifdef CONFIG_PROC_FS | |
1566 | rpc_proc_register(&nfs_rpcstat); | |
1567 | #endif | |
f7b422b1 | 1568 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1569 | goto out; |
1570 | return 0; | |
1571 | out: | |
1572 | #ifdef CONFIG_PROC_FS | |
1573 | rpc_proc_unregister("nfs"); | |
1574 | #endif | |
1da177e4 | 1575 | nfs_destroy_directcache(); |
6b59a754 | 1576 | out0: |
6b59a754 | 1577 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1578 | out1: |
1579 | nfs_destroy_readpagecache(); | |
1580 | out2: | |
1581 | nfs_destroy_inodecache(); | |
1582 | out3: | |
1583 | nfs_destroy_nfspagecache(); | |
1584 | out4: | |
6aaca566 DH |
1585 | nfs_fs_proc_exit(); |
1586 | out5: | |
5746006f TM |
1587 | nfsiod_stop(); |
1588 | out6: | |
8ec442ae DH |
1589 | nfs_fscache_unregister(); |
1590 | out7: | |
e571cbf1 TM |
1591 | nfs_dns_resolver_destroy(); |
1592 | out8: | |
955a857e BS |
1593 | nfs_idmap_quit(); |
1594 | out9: | |
1da177e4 LT |
1595 | return err; |
1596 | } | |
1597 | ||
1598 | static void __exit exit_nfs_fs(void) | |
1599 | { | |
1da177e4 | 1600 | nfs_destroy_directcache(); |
1da177e4 LT |
1601 | nfs_destroy_writepagecache(); |
1602 | nfs_destroy_readpagecache(); | |
1603 | nfs_destroy_inodecache(); | |
1604 | nfs_destroy_nfspagecache(); | |
8ec442ae | 1605 | nfs_fscache_unregister(); |
e571cbf1 | 1606 | nfs_dns_resolver_destroy(); |
955a857e | 1607 | nfs_idmap_quit(); |
1da177e4 LT |
1608 | #ifdef CONFIG_PROC_FS |
1609 | rpc_proc_unregister("nfs"); | |
1610 | #endif | |
f7b422b1 | 1611 | unregister_nfs_fs(); |
6aaca566 | 1612 | nfs_fs_proc_exit(); |
5746006f | 1613 | nfsiod_stop(); |
1da177e4 LT |
1614 | } |
1615 | ||
1616 | /* Not quite true; I just maintain it */ | |
1617 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1618 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1619 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1620 | |
1621 | module_init(init_nfs_fs) | |
1622 | module_exit(exit_nfs_fs) |