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