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> | |
33 | #include <linux/smp_lock.h> | |
34 | #include <linux/seq_file.h> | |
35 | #include <linux/mount.h> | |
36 | #include <linux/nfs_idmap.h> | |
37 | #include <linux/vfs.h> | |
9cdb3883 MN |
38 | #include <linux/inet.h> |
39 | #include <linux/nfs_xdr.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" |
1da177e4 LT |
49 | |
50 | #define NFSDBG_FACILITY NFSDBG_VFS | |
1da177e4 | 51 | |
f43bf0be TM |
52 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
53 | ||
54 | /* Default is to see 64-bit inode numbers */ | |
55 | static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; | |
56 | ||
1da177e4 | 57 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 58 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 59 | |
e18b890b | 60 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 61 | |
1da177e4 LT |
62 | static inline unsigned long |
63 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
64 | { | |
65 | return nfs_fileid_to_ino_t(fattr->fileid); | |
66 | } | |
67 | ||
72cb77f4 TM |
68 | /** |
69 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
70 | * @word: long word containing the bit lock | |
71 | */ | |
72 | int nfs_wait_bit_killable(void *word) | |
73 | { | |
74 | if (fatal_signal_pending(current)) | |
75 | return -ERESTARTSYS; | |
76 | schedule(); | |
77 | return 0; | |
78 | } | |
79 | ||
f43bf0be TM |
80 | /** |
81 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
82 | * @fileid: 64-bit fileid | |
83 | * | |
84 | * This function returns a 32-bit inode number if the boot parameter | |
85 | * nfs.enable_ino64 is zero. | |
86 | */ | |
87 | u64 nfs_compat_user_ino64(u64 fileid) | |
88 | { | |
89 | int ino; | |
90 | ||
91 | if (enable_ino64) | |
92 | return fileid; | |
93 | ino = fileid; | |
94 | if (sizeof(ino) < sizeof(fileid)) | |
95 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
96 | return ino; | |
97 | } | |
98 | ||
f7b422b1 | 99 | int nfs_write_inode(struct inode *inode, int sync) |
1da177e4 | 100 | { |
1da177e4 LT |
101 | int ret; |
102 | ||
d30c8348 TM |
103 | if (sync) { |
104 | ret = filemap_fdatawait(inode->i_mapping); | |
105 | if (ret == 0) | |
106 | ret = nfs_commit_inode(inode, FLUSH_SYNC); | |
107 | } else | |
108 | ret = nfs_commit_inode(inode, 0); | |
109 | if (ret >= 0) | |
110 | return 0; | |
111 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); | |
112 | return ret; | |
1da177e4 LT |
113 | } |
114 | ||
f7b422b1 | 115 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 116 | { |
da6d503a TM |
117 | /* |
118 | * The following should never happen... | |
119 | */ | |
120 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 121 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 122 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 123 | nfs_access_zap_cache(inode); |
1da177e4 LT |
124 | } |
125 | ||
29884df0 TM |
126 | /** |
127 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
128 | */ | |
129 | int nfs_sync_mapping(struct address_space *mapping) | |
130 | { | |
131 | int ret; | |
132 | ||
133 | if (mapping->nrpages == 0) | |
134 | return 0; | |
135 | unmap_mapping_range(mapping, 0, 0, 0); | |
28fd1298 | 136 | ret = filemap_write_and_wait(mapping); |
29884df0 TM |
137 | if (ret != 0) |
138 | goto out; | |
139 | ret = nfs_wb_all(mapping->host); | |
140 | out: | |
141 | return ret; | |
142 | } | |
143 | ||
1da177e4 LT |
144 | /* |
145 | * Invalidate the local caches | |
146 | */ | |
b37b03b7 | 147 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
148 | { |
149 | struct nfs_inode *nfsi = NFS_I(inode); | |
150 | int mode = inode->i_mode; | |
151 | ||
91d5b470 CL |
152 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
153 | ||
c7c20973 TM |
154 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
155 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 LT |
156 | |
157 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
158 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 159 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 160 | else |
55296809 | 161 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 162 | } |
dc59250c | 163 | |
b37b03b7 TM |
164 | void nfs_zap_caches(struct inode *inode) |
165 | { | |
166 | spin_lock(&inode->i_lock); | |
167 | nfs_zap_caches_locked(inode); | |
dc59250c | 168 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
169 | } |
170 | ||
cd9ae2b6 TM |
171 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
172 | { | |
173 | if (mapping->nrpages != 0) { | |
174 | spin_lock(&inode->i_lock); | |
175 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
176 | spin_unlock(&inode->i_lock); | |
177 | } | |
178 | } | |
179 | ||
f41f7418 | 180 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
181 | { |
182 | void (*clear_acl_cache)(struct inode *); | |
183 | ||
184 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
185 | if (clear_acl_cache != NULL) | |
186 | clear_acl_cache(inode); | |
dc59250c | 187 | spin_lock(&inode->i_lock); |
55296809 | 188 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 189 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
190 | } |
191 | ||
c4812998 TM |
192 | void nfs_invalidate_atime(struct inode *inode) |
193 | { | |
194 | spin_lock(&inode->i_lock); | |
195 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
196 | spin_unlock(&inode->i_lock); | |
197 | } | |
198 | ||
1da177e4 | 199 | /* |
b37b03b7 TM |
200 | * Invalidate, but do not unhash, the inode. |
201 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 202 | */ |
b37b03b7 | 203 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 204 | { |
3a10c30a | 205 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 206 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
207 | } |
208 | ||
209 | struct nfs_find_desc { | |
210 | struct nfs_fh *fh; | |
211 | struct nfs_fattr *fattr; | |
212 | }; | |
213 | ||
214 | /* | |
215 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
216 | * this, and re-exported directories (also seen in NFSv2) | |
217 | * we are forced to allow 2 different inodes to have the same | |
218 | * i_ino. | |
219 | */ | |
220 | static int | |
221 | nfs_find_actor(struct inode *inode, void *opaque) | |
222 | { | |
223 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
224 | struct nfs_fh *fh = desc->fh; | |
225 | struct nfs_fattr *fattr = desc->fattr; | |
226 | ||
227 | if (NFS_FILEID(inode) != fattr->fileid) | |
228 | return 0; | |
229 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
230 | return 0; | |
231 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
232 | return 0; | |
233 | return 1; | |
234 | } | |
235 | ||
236 | static int | |
237 | nfs_init_locked(struct inode *inode, void *opaque) | |
238 | { | |
239 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
240 | struct nfs_fattr *fattr = desc->fattr; | |
241 | ||
99fadcd7 | 242 | set_nfs_fileid(inode, fattr->fileid); |
1da177e4 LT |
243 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
244 | return 0; | |
245 | } | |
246 | ||
247 | /* Don't use READDIRPLUS on directories that we believe are too large */ | |
248 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) | |
249 | ||
250 | /* | |
251 | * This is our front-end to iget that looks up inodes by file handle | |
252 | * instead of inode number. | |
253 | */ | |
254 | struct inode * | |
255 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
256 | { | |
257 | struct nfs_find_desc desc = { | |
258 | .fh = fh, | |
259 | .fattr = fattr | |
260 | }; | |
03f28e3a | 261 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
262 | unsigned long hash; |
263 | ||
9e6e70f8 | 264 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) |
1da177e4 | 265 | goto out_no_inode; |
9e6e70f8 | 266 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 267 | goto out_no_inode; |
1da177e4 LT |
268 | |
269 | hash = nfs_fattr_to_ino_t(fattr); | |
270 | ||
03f28e3a TM |
271 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
272 | if (inode == NULL) { | |
273 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 274 | goto out_no_inode; |
03f28e3a | 275 | } |
1da177e4 LT |
276 | |
277 | if (inode->i_state & I_NEW) { | |
278 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 279 | unsigned long now = jiffies; |
1da177e4 LT |
280 | |
281 | /* We set i_ino for the few things that still rely on it, | |
282 | * such as stat(2) */ | |
283 | inode->i_ino = hash; | |
284 | ||
285 | /* We can't support update_atime(), since the server will reset it */ | |
286 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
287 | inode->i_mode = fattr->mode; | |
288 | /* Why so? Because we want revalidate for devices/FIFOs, and | |
289 | * that's precisely what we have in nfs_file_inode_operations. | |
290 | */ | |
8fa5c000 | 291 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 LT |
292 | if (S_ISREG(inode->i_mode)) { |
293 | inode->i_fop = &nfs_file_operations; | |
294 | inode->i_data.a_ops = &nfs_file_aops; | |
295 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
296 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 297 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 LT |
298 | inode->i_fop = &nfs_dir_operations; |
299 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) | |
300 | && fattr->size <= NFS_LIMIT_READDIRPLUS) | |
3a10c30a | 301 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
55a97593 | 302 | /* Deal with crossing mountpoints */ |
9e6e70f8 TM |
303 | if ((fattr->valid & NFS_ATTR_FATTR_FSID) |
304 | && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { | |
6b97fd3d MN |
305 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
306 | inode->i_op = &nfs_referral_inode_operations; | |
307 | else | |
308 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 309 | inode->i_fop = NULL; |
c37dcd33 | 310 | set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags); |
55a97593 | 311 | } |
1da177e4 LT |
312 | } else if (S_ISLNK(inode->i_mode)) |
313 | inode->i_op = &nfs_symlink_inode_operations; | |
314 | else | |
315 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
316 | ||
9e6e70f8 TM |
317 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
318 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
319 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
320 | nfsi->change_attr = 0; | |
321 | inode->i_size = 0; | |
322 | inode->i_nlink = 0; | |
323 | inode->i_uid = -2; | |
324 | inode->i_gid = -2; | |
325 | inode->i_blocks = 0; | |
326 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
327 | ||
33801147 | 328 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 329 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
330 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
331 | inode->i_atime = fattr->atime; | |
332 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
333 | inode->i_mtime = fattr->mtime; | |
334 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
335 | inode->i_ctime = fattr->ctime; | |
336 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
1da177e4 | 337 | nfsi->change_attr = fattr->change_attr; |
9e6e70f8 TM |
338 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
339 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
340 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) | |
341 | inode->i_nlink = fattr->nlink; | |
342 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) | |
343 | inode->i_uid = fattr->uid; | |
344 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) | |
345 | inode->i_gid = fattr->gid; | |
346 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) | |
347 | inode->i_blocks = fattr->du.nfs2.blocks; | |
348 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
349 | /* |
350 | * report the blocks in 512byte units | |
351 | */ | |
352 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
353 | } |
354 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 355 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 356 | nfsi->access_cache = RB_ROOT; |
1da177e4 LT |
357 | |
358 | unlock_new_inode(inode); | |
359 | } else | |
360 | nfs_refresh_inode(inode, fattr); | |
361 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
362 | inode->i_sb->s_id, | |
363 | (long long)NFS_FILEID(inode), | |
364 | atomic_read(&inode->i_count)); | |
365 | ||
366 | out: | |
367 | return inode; | |
368 | ||
369 | out_no_inode: | |
03f28e3a | 370 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
371 | goto out; |
372 | } | |
373 | ||
659bfcd6 | 374 | #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 |
375 | |
376 | int | |
377 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
378 | { | |
379 | struct inode *inode = dentry->d_inode; | |
380 | struct nfs_fattr fattr; | |
381 | int error; | |
382 | ||
91d5b470 CL |
383 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
384 | ||
188b95dd JL |
385 | /* skip mode change if it's just for clearing setuid/setgid */ |
386 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
387 | attr->ia_valid &= ~ATTR_MODE; | |
388 | ||
1da177e4 LT |
389 | if (attr->ia_valid & ATTR_SIZE) { |
390 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
391 | attr->ia_valid &= ~ATTR_SIZE; | |
392 | } | |
393 | ||
394 | /* Optimization: if the end result is no change, don't RPC */ | |
395 | attr->ia_valid &= NFS_VALID_ATTRS; | |
659bfcd6 | 396 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
1da177e4 LT |
397 | return 0; |
398 | ||
755c1e20 | 399 | /* Write all dirty data */ |
e1552e19 TM |
400 | if (S_ISREG(inode->i_mode)) { |
401 | filemap_write_and_wait(inode->i_mapping); | |
402 | nfs_wb_all(inode); | |
403 | } | |
642ac549 TM |
404 | /* |
405 | * Return any delegations if we're going to change ACLs | |
406 | */ | |
407 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
408 | nfs_inode_return_delegation(inode); | |
1da177e4 | 409 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
65e4308d | 410 | if (error == 0) |
1da177e4 | 411 | nfs_refresh_inode(inode, &fattr); |
65e4308d TM |
412 | return error; |
413 | } | |
414 | ||
a3d01454 TM |
415 | /** |
416 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
417 | * @inode: inode of the file used | |
418 | * @offset: file offset to start truncating | |
419 | * | |
420 | * This is a copy of the common vmtruncate, but with the locking | |
421 | * corrected to take into account the fact that NFS requires | |
422 | * inode->i_size to be updated under the inode->i_lock. | |
423 | */ | |
424 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
425 | { | |
426 | if (i_size_read(inode) < offset) { | |
427 | unsigned long limit; | |
428 | ||
429 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; | |
430 | if (limit != RLIM_INFINITY && offset > limit) | |
431 | goto out_sig; | |
432 | if (offset > inode->i_sb->s_maxbytes) | |
433 | goto out_big; | |
434 | spin_lock(&inode->i_lock); | |
435 | i_size_write(inode, offset); | |
436 | spin_unlock(&inode->i_lock); | |
437 | } else { | |
438 | struct address_space *mapping = inode->i_mapping; | |
439 | ||
440 | /* | |
441 | * truncation of in-use swapfiles is disallowed - it would | |
442 | * cause subsequent swapout to scribble on the now-freed | |
443 | * blocks. | |
444 | */ | |
445 | if (IS_SWAPFILE(inode)) | |
446 | return -ETXTBSY; | |
447 | spin_lock(&inode->i_lock); | |
448 | i_size_write(inode, offset); | |
449 | spin_unlock(&inode->i_lock); | |
450 | ||
451 | /* | |
452 | * unmap_mapping_range is called twice, first simply for | |
453 | * efficiency so that truncate_inode_pages does fewer | |
454 | * single-page unmaps. However after this first call, and | |
455 | * before truncate_inode_pages finishes, it is possible for | |
456 | * private pages to be COWed, which remain after | |
457 | * truncate_inode_pages finishes, hence the second | |
458 | * unmap_mapping_range call must be made for correctness. | |
459 | */ | |
460 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); | |
461 | truncate_inode_pages(mapping, offset); | |
462 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); | |
463 | } | |
464 | return 0; | |
465 | out_sig: | |
466 | send_sig(SIGXFSZ, current, 0); | |
467 | out_big: | |
468 | return -EFBIG; | |
469 | } | |
470 | ||
65e4308d TM |
471 | /** |
472 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
473 | * @inode: pointer to struct inode | |
474 | * @attr: pointer to struct iattr | |
475 | * | |
476 | * Note: we do this in the *proc.c in order to ensure that | |
477 | * it works for things like exclusive creates too. | |
478 | */ | |
479 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
480 | { | |
481 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
2f28ea61 | 482 | spin_lock(&inode->i_lock); |
1da177e4 | 483 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
484 | int mode = attr->ia_mode & S_IALLUGO; |
485 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
486 | inode->i_mode = mode; |
487 | } | |
488 | if ((attr->ia_valid & ATTR_UID) != 0) | |
489 | inode->i_uid = attr->ia_uid; | |
490 | if ((attr->ia_valid & ATTR_GID) != 0) | |
491 | inode->i_gid = attr->ia_gid; | |
55296809 | 492 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 493 | spin_unlock(&inode->i_lock); |
65e4308d TM |
494 | } |
495 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 496 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 497 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 498 | } |
1da177e4 LT |
499 | } |
500 | ||
1da177e4 LT |
501 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
502 | { | |
503 | struct inode *inode = dentry->d_inode; | |
55296809 | 504 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
505 | int err; |
506 | ||
28c494c5 CL |
507 | /* |
508 | * Flush out writes to the server in order to update c/mtime. | |
509 | * | |
510 | * Hold the i_mutex to suspend application writes temporarily; | |
511 | * this prevents long-running writing applications from blocking | |
512 | * nfs_wb_nocommit. | |
513 | */ | |
514 | if (S_ISREG(inode->i_mode)) { | |
515 | mutex_lock(&inode->i_mutex); | |
ed90ef51 | 516 | nfs_wb_nocommit(inode); |
28c494c5 CL |
517 | mutex_unlock(&inode->i_mutex); |
518 | } | |
fc33a7bb CH |
519 | |
520 | /* | |
521 | * We may force a getattr if the user cares about atime. | |
522 | * | |
523 | * Note that we only have to check the vfsmount flags here: | |
524 | * - NFS always sets S_NOATIME by so checking it would give a | |
525 | * bogus result | |
526 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
527 | * no point in checking those. | |
528 | */ | |
529 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
530 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 531 | need_atime = 0; |
fc33a7bb | 532 | |
1da177e4 LT |
533 | if (need_atime) |
534 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
535 | else | |
536 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 537 | if (!err) { |
1da177e4 | 538 | generic_fillattr(inode, stat); |
f43bf0be | 539 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
4e769b93 | 540 | } |
1da177e4 LT |
541 | return err; |
542 | } | |
543 | ||
7fe5c398 TM |
544 | /** |
545 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
546 | * @ctx: pointer to context | |
547 | * @is_sync: is this a synchronous close | |
548 | * | |
549 | * always ensure that the attributes are up to date if we're mounted | |
550 | * with close-to-open semantics | |
551 | */ | |
552 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
553 | { | |
554 | struct inode *inode; | |
555 | struct nfs_server *server; | |
556 | ||
557 | if (!(ctx->mode & FMODE_WRITE)) | |
558 | return; | |
559 | if (!is_sync) | |
560 | return; | |
561 | inode = ctx->path.dentry->d_inode; | |
562 | if (!list_empty(&NFS_I(inode)->open_files)) | |
563 | return; | |
564 | server = NFS_SERVER(inode); | |
565 | if (server->flags & NFS_MOUNT_NOCTO) | |
566 | return; | |
567 | nfs_revalidate_inode(server, inode); | |
568 | } | |
569 | ||
b92dccf6 | 570 | static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred) |
1da177e4 LT |
571 | { |
572 | struct nfs_open_context *ctx; | |
573 | ||
f52720ca | 574 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
1da177e4 | 575 | if (ctx != NULL) { |
88be9f99 TM |
576 | ctx->path.dentry = dget(dentry); |
577 | ctx->path.mnt = mntget(mnt); | |
1da177e4 LT |
578 | ctx->cred = get_rpccred(cred); |
579 | ctx->state = NULL; | |
580 | ctx->lockowner = current->files; | |
66d3aac0 | 581 | ctx->flags = 0; |
1da177e4 | 582 | ctx->error = 0; |
00a92642 | 583 | ctx->dir_cookie = 0; |
5e11934d | 584 | atomic_set(&ctx->count, 1); |
1da177e4 LT |
585 | } |
586 | return ctx; | |
587 | } | |
588 | ||
589 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
590 | { | |
591 | if (ctx != NULL) | |
5e11934d | 592 | atomic_inc(&ctx->count); |
1da177e4 LT |
593 | return ctx; |
594 | } | |
595 | ||
7fe5c398 | 596 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 597 | { |
7fe5c398 | 598 | struct inode *inode = ctx->path.dentry->d_inode; |
3bec63db | 599 | |
5e11934d TM |
600 | if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock)) |
601 | return; | |
602 | list_del(&ctx->list); | |
603 | spin_unlock(&inode->i_lock); | |
7fe5c398 | 604 | NFS_PROTO(inode)->close_context(ctx, is_sync); |
3bec63db TM |
605 | if (ctx->cred != NULL) |
606 | put_rpccred(ctx->cred); | |
31f31db1 | 607 | path_put(&ctx->path); |
3bec63db TM |
608 | kfree(ctx); |
609 | } | |
610 | ||
a49c3c77 TM |
611 | void put_nfs_open_context(struct nfs_open_context *ctx) |
612 | { | |
613 | __put_nfs_open_context(ctx, 0); | |
614 | } | |
615 | ||
616 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) | |
617 | { | |
618 | __put_nfs_open_context(ctx, 1); | |
619 | } | |
620 | ||
1da177e4 LT |
621 | /* |
622 | * Ensure that mmap has a recent RPC credential for use when writing out | |
623 | * shared pages | |
624 | */ | |
b92dccf6 | 625 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 626 | { |
01cce933 | 627 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
628 | struct nfs_inode *nfsi = NFS_I(inode); |
629 | ||
630 | filp->private_data = get_nfs_open_context(ctx); | |
631 | spin_lock(&inode->i_lock); | |
632 | list_add(&ctx->list, &nfsi->open_files); | |
633 | spin_unlock(&inode->i_lock); | |
634 | } | |
635 | ||
d530838b TM |
636 | /* |
637 | * Given an inode, search for an open context with the desired characteristics | |
638 | */ | |
dc0b027d | 639 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
640 | { |
641 | struct nfs_inode *nfsi = NFS_I(inode); | |
642 | struct nfs_open_context *pos, *ctx = NULL; | |
643 | ||
644 | spin_lock(&inode->i_lock); | |
645 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
646 | if (cred != NULL && pos->cred != cred) |
647 | continue; | |
1da177e4 LT |
648 | if ((pos->mode & mode) == mode) { |
649 | ctx = get_nfs_open_context(pos); | |
650 | break; | |
651 | } | |
652 | } | |
653 | spin_unlock(&inode->i_lock); | |
654 | return ctx; | |
655 | } | |
656 | ||
b92dccf6 | 657 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 658 | { |
01cce933 | 659 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 660 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
661 | |
662 | if (ctx) { | |
663 | filp->private_data = NULL; | |
664 | spin_lock(&inode->i_lock); | |
665 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
666 | spin_unlock(&inode->i_lock); | |
a49c3c77 | 667 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
668 | } |
669 | } | |
670 | ||
671 | /* | |
672 | * These allocate and release file read/write context information. | |
673 | */ | |
674 | int nfs_open(struct inode *inode, struct file *filp) | |
675 | { | |
676 | struct nfs_open_context *ctx; | |
677 | struct rpc_cred *cred; | |
678 | ||
98a8e323 | 679 | cred = rpc_lookup_cred(); |
1da177e4 LT |
680 | if (IS_ERR(cred)) |
681 | return PTR_ERR(cred); | |
01cce933 | 682 | ctx = alloc_nfs_open_context(filp->f_path.mnt, filp->f_path.dentry, cred); |
1da177e4 LT |
683 | put_rpccred(cred); |
684 | if (ctx == NULL) | |
685 | return -ENOMEM; | |
686 | ctx->mode = filp->f_mode; | |
687 | nfs_file_set_open_context(filp, ctx); | |
688 | put_nfs_open_context(ctx); | |
1da177e4 LT |
689 | return 0; |
690 | } | |
691 | ||
692 | int nfs_release(struct inode *inode, struct file *filp) | |
693 | { | |
1da177e4 LT |
694 | nfs_file_clear_open_context(filp); |
695 | return 0; | |
696 | } | |
697 | ||
698 | /* | |
699 | * This function is called whenever some part of NFS notices that | |
700 | * the cached attributes have to be refreshed. | |
701 | */ | |
702 | int | |
703 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
704 | { | |
705 | int status = -ESTALE; | |
706 | struct nfs_fattr fattr; | |
707 | struct nfs_inode *nfsi = NFS_I(inode); | |
1da177e4 LT |
708 | |
709 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
710 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
711 | ||
85233a7a | 712 | if (is_bad_inode(inode)) |
691beb13 | 713 | goto out; |
1da177e4 | 714 | if (NFS_STALE(inode)) |
412d582e | 715 | goto out; |
7fdc49c4 | 716 | |
691beb13 | 717 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
1da177e4 LT |
718 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
719 | if (status != 0) { | |
720 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
721 | inode->i_sb->s_id, | |
722 | (long long)NFS_FILEID(inode), status); | |
723 | if (status == -ESTALE) { | |
724 | nfs_zap_caches(inode); | |
725 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 726 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 LT |
727 | } |
728 | goto out; | |
729 | } | |
730 | ||
4dc05efb | 731 | status = nfs_refresh_inode(inode, &fattr); |
1da177e4 LT |
732 | if (status) { |
733 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", | |
734 | inode->i_sb->s_id, | |
735 | (long long)NFS_FILEID(inode), status); | |
736 | goto out; | |
737 | } | |
55296809 | 738 | |
24aa1fe6 | 739 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 740 | nfs_zap_acl_cache(inode); |
55296809 | 741 | |
1da177e4 LT |
742 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
743 | inode->i_sb->s_id, | |
744 | (long long)NFS_FILEID(inode)); | |
745 | ||
412d582e | 746 | out: |
1da177e4 LT |
747 | return status; |
748 | } | |
749 | ||
750 | int nfs_attribute_timeout(struct inode *inode) | |
751 | { | |
752 | struct nfs_inode *nfsi = NFS_I(inode); | |
753 | ||
754 | if (nfs_have_delegation(inode, FMODE_READ)) | |
755 | return 0; | |
64672d55 | 756 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
1da177e4 LT |
757 | } |
758 | ||
759 | /** | |
760 | * nfs_revalidate_inode - Revalidate the inode attributes | |
761 | * @server - pointer to nfs_server struct | |
762 | * @inode - pointer to inode struct | |
763 | * | |
764 | * Updates inode attribute information by retrieving the data from the server. | |
765 | */ | |
766 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
767 | { | |
44b11874 | 768 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
1da177e4 LT |
769 | && !nfs_attribute_timeout(inode)) |
770 | return NFS_STALE(inode) ? -ESTALE : 0; | |
771 | return __nfs_revalidate_inode(server, inode); | |
772 | } | |
773 | ||
717d44e8 TM |
774 | static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
775 | { | |
776 | struct nfs_inode *nfsi = NFS_I(inode); | |
777 | ||
778 | if (mapping->nrpages != 0) { | |
779 | int ret = invalidate_inode_pages2(mapping); | |
780 | if (ret < 0) | |
781 | return ret; | |
782 | } | |
783 | spin_lock(&inode->i_lock); | |
784 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 785 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 786 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
787 | spin_unlock(&inode->i_lock); |
788 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
789 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", | |
790 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
791 | return 0; | |
792 | } | |
793 | ||
794 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) | |
795 | { | |
796 | int ret = 0; | |
797 | ||
798 | mutex_lock(&inode->i_mutex); | |
799 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) { | |
800 | ret = nfs_sync_mapping(mapping); | |
801 | if (ret == 0) | |
802 | ret = nfs_invalidate_mapping_nolock(inode, mapping); | |
803 | } | |
804 | mutex_unlock(&inode->i_mutex); | |
805 | return ret; | |
806 | } | |
807 | ||
7d52e862 | 808 | /** |
717d44e8 | 809 | * nfs_revalidate_mapping_nolock - Revalidate the pagecache |
7d52e862 TM |
810 | * @inode - pointer to host inode |
811 | * @mapping - pointer to mapping | |
812 | */ | |
717d44e8 | 813 | int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
7d52e862 TM |
814 | { |
815 | struct nfs_inode *nfsi = NFS_I(inode); | |
44b11874 TM |
816 | int ret = 0; |
817 | ||
44b11874 | 818 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
717d44e8 | 819 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { |
44b11874 | 820 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
717d44e8 TM |
821 | if (ret < 0) |
822 | goto out; | |
823 | } | |
824 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
825 | ret = nfs_invalidate_mapping_nolock(inode, mapping); | |
826 | out: | |
827 | return ret; | |
828 | } | |
7d52e862 | 829 | |
717d44e8 TM |
830 | /** |
831 | * nfs_revalidate_mapping - Revalidate the pagecache | |
832 | * @inode - pointer to host inode | |
833 | * @mapping - pointer to mapping | |
834 | * | |
835 | * This version of the function will take the inode->i_mutex and attempt to | |
836 | * flush out all dirty data if it needs to invalidate the page cache. | |
837 | */ | |
838 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
839 | { | |
840 | struct nfs_inode *nfsi = NFS_I(inode); | |
841 | int ret = 0; | |
dc59250c | 842 | |
717d44e8 TM |
843 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
844 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { | |
845 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
846 | if (ret < 0) | |
847 | goto out; | |
7d52e862 | 848 | } |
717d44e8 TM |
849 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
850 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 851 | out: |
44b11874 | 852 | return ret; |
7d52e862 TM |
853 | } |
854 | ||
a895b4a1 TM |
855 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
856 | { | |
857 | struct nfs_inode *nfsi = NFS_I(inode); | |
858 | ||
9e6e70f8 TM |
859 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
860 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
861 | && nfsi->change_attr == fattr->pre_change_attr) { | |
70ca8852 TM |
862 | nfsi->change_attr = fattr->change_attr; |
863 | if (S_ISDIR(inode->i_mode)) | |
864 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
865 | } | |
a895b4a1 | 866 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
867 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
868 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
869 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) | |
a895b4a1 | 870 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
9e6e70f8 TM |
871 | |
872 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
873 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
874 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
a895b4a1 | 875 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
e323ea46 TM |
876 | if (S_ISDIR(inode->i_mode)) |
877 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
a895b4a1 | 878 | } |
9e6e70f8 TM |
879 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
880 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
881 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
882 | && nfsi->npages == 0) | |
883 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); | |
a895b4a1 TM |
884 | } |
885 | ||
1da177e4 | 886 | /** |
33801147 | 887 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
888 | * @inode - pointer to inode |
889 | * @fattr - updated attributes | |
890 | * | |
891 | * Verifies the attribute cache. If we have just changed the attributes, | |
892 | * so that fattr carries weak cache consistency data, then it may | |
893 | * also update the ctime/mtime/change_attribute. | |
894 | */ | |
33801147 | 895 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
896 | { |
897 | struct nfs_inode *nfsi = NFS_I(inode); | |
898 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 899 | unsigned long invalid = 0; |
1da177e4 | 900 | |
dc59250c | 901 | |
ca62b9c3 | 902 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
903 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
904 | return -EIO; | |
905 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 906 | return -EIO; |
ca62b9c3 | 907 | |
9e6e70f8 | 908 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
f1bb0b92 | 909 | nfsi->change_attr != fattr->change_attr) |
2a3f5fd4 | 910 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 911 | |
1da177e4 | 912 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 913 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
2a3f5fd4 | 914 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
ca62b9c3 | 915 | |
9e6e70f8 TM |
916 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
917 | cur_size = i_size_read(inode); | |
918 | new_isize = nfs_size_to_loff_t(fattr->size); | |
919 | if (cur_size != new_isize && nfsi->npages == 0) | |
920 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
921 | } | |
1da177e4 LT |
922 | |
923 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
924 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
925 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
926 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) | |
927 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
928 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) | |
2a3f5fd4 | 929 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
930 | |
931 | /* Has the link count changed? */ | |
9e6e70f8 | 932 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 933 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 934 | |
9e6e70f8 | 935 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
936 | invalid |= NFS_INO_INVALID_ATIME; |
937 | ||
938 | if (invalid != 0) | |
939 | nfsi->cache_validity |= invalid; | |
1da177e4 | 940 | |
33801147 | 941 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
942 | return 0; |
943 | } | |
944 | ||
a10ad176 | 945 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
870a5be8 | 946 | { |
9e6e70f8 TM |
947 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
948 | return 0; | |
a10ad176 TM |
949 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
950 | } | |
951 | ||
952 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
953 | { | |
9e6e70f8 TM |
954 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
955 | return 0; | |
a10ad176 TM |
956 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
957 | } | |
870a5be8 | 958 | |
ae05f269 | 959 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
960 | |
961 | static unsigned long nfs_read_attr_generation_counter(void) | |
962 | { | |
ae05f269 | 963 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
964 | } |
965 | ||
966 | unsigned long nfs_inc_attr_generation_counter(void) | |
967 | { | |
ae05f269 | 968 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 TM |
969 | } |
970 | ||
971 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
972 | { | |
973 | fattr->valid = 0; | |
974 | fattr->time_start = jiffies; | |
975 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
976 | } | |
977 | ||
a10ad176 TM |
978 | /** |
979 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
980 | * @inode - pointer to inode | |
981 | * @fattr - attributes | |
982 | * | |
983 | * Attempt to divine whether or not an RPC call reply carrying stale | |
984 | * attributes got scheduled after another call carrying updated ones. | |
985 | * | |
986 | * To do so, the function first assumes that a more recent ctime means | |
987 | * that the attributes in fattr are newer, however it also attempt to | |
988 | * catch the case where ctime either didn't change, or went backwards | |
989 | * (if someone reset the clock on the server) by looking at whether | |
990 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 991 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
992 | * |
993 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
994 | * more recent than the ones cached in the inode. | |
995 | * | |
996 | */ | |
997 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
998 | { | |
999 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1000 | ||
4704f0e2 | 1001 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
03254e65 TM |
1002 | nfs_ctime_need_update(inode, fattr) || |
1003 | nfs_size_need_update(inode, fattr) || | |
4704f0e2 | 1004 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1005 | } |
1006 | ||
1007 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1008 | { | |
1009 | if (nfs_inode_attrs_need_update(inode, fattr)) | |
870a5be8 TM |
1010 | return nfs_update_inode(inode, fattr); |
1011 | return nfs_check_inode_attributes(inode, fattr); | |
1012 | } | |
1013 | ||
33801147 TM |
1014 | /** |
1015 | * nfs_refresh_inode - try to update the inode attribute cache | |
1016 | * @inode - pointer to inode | |
1017 | * @fattr - updated attributes | |
1018 | * | |
1019 | * Check that an RPC call that returned attributes has not overlapped with | |
1020 | * other recent updates of the inode metadata, then decide whether it is | |
1021 | * safe to do a full update of the inode attributes, or whether just to | |
1022 | * call nfs_check_inode_attributes. | |
1023 | */ | |
1024 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1025 | { | |
33801147 TM |
1026 | int status; |
1027 | ||
1028 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1029 | return 0; | |
1030 | spin_lock(&inode->i_lock); | |
870a5be8 | 1031 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 TM |
1032 | spin_unlock(&inode->i_lock); |
1033 | return status; | |
1034 | } | |
1035 | ||
d65f557f TM |
1036 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1037 | { | |
1038 | struct nfs_inode *nfsi = NFS_I(inode); | |
1039 | ||
1040 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1041 | if (S_ISDIR(inode->i_mode)) | |
1042 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
1043 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1044 | return 0; | |
1045 | return nfs_refresh_inode_locked(inode, fattr); | |
1046 | } | |
1047 | ||
decf491f TM |
1048 | /** |
1049 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1050 | * @inode - pointer to inode | |
1051 | * @fattr - updated attributes | |
1052 | * | |
1053 | * After an operation that has changed the inode metadata, mark the | |
1054 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1055 | * |
1056 | * NB: if the server didn't return any post op attributes, this | |
1057 | * function will force the retrieval of attributes before the next | |
1058 | * NFS request. Thus it should be used only for operations that | |
1059 | * are expected to change one or more attributes, to avoid | |
1060 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1061 | */ |
1062 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1063 | { | |
d65f557f | 1064 | int status; |
decf491f | 1065 | |
7668fdbe | 1066 | spin_lock(&inode->i_lock); |
d65f557f | 1067 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1068 | spin_unlock(&inode->i_lock); |
870a5be8 | 1069 | return status; |
decf491f TM |
1070 | } |
1071 | ||
70ca8852 TM |
1072 | /** |
1073 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1074 | * @inode - pointer to inode | |
1075 | * @fattr - updated attributes | |
1076 | * | |
1077 | * After an operation that has changed the inode metadata, mark the | |
1078 | * attribute cache as being invalid, then try to update it. Fake up | |
1079 | * weak cache consistency data, if none exist. | |
1080 | * | |
1081 | * This function is mainly designed to be used by the ->write_done() functions. | |
1082 | */ | |
1083 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1084 | { | |
d65f557f TM |
1085 | int status; |
1086 | ||
1087 | spin_lock(&inode->i_lock); | |
1088 | /* Don't do a WCC update if these attributes are already stale */ | |
1089 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1090 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1091 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1092 | | NFS_ATTR_FATTR_PRESIZE | |
1093 | | NFS_ATTR_FATTR_PREMTIME | |
1094 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1095 | goto out_noforce; |
1096 | } | |
9e6e70f8 TM |
1097 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1098 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
70ca8852 | 1099 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
9e6e70f8 | 1100 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1101 | } |
9e6e70f8 TM |
1102 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1103 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1104 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1105 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1106 | } | |
1107 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1108 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1109 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1110 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1111 | } | |
1112 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1113 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1114 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1115 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1116 | } |
d65f557f TM |
1117 | out_noforce: |
1118 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
1119 | spin_unlock(&inode->i_lock); | |
1120 | return status; | |
70ca8852 TM |
1121 | } |
1122 | ||
1da177e4 LT |
1123 | /* |
1124 | * Many nfs protocol calls return the new file attributes after | |
1125 | * an operation. Here we update the inode to reflect the state | |
1126 | * of the server's inode. | |
1127 | * | |
1128 | * This is a bit tricky because we have to make sure all dirty pages | |
1129 | * have been sent off to the server before calling invalidate_inode_pages. | |
1130 | * To make sure no other process adds more write requests while we try | |
1131 | * our best to flush them, we make them sleep during the attribute refresh. | |
1132 | * | |
1133 | * A very similar scenario holds for the dir cache. | |
1134 | */ | |
24aa1fe6 | 1135 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1136 | { |
8b4bdcf8 | 1137 | struct nfs_server *server; |
1da177e4 | 1138 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1139 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1140 | unsigned long invalid = 0; |
3e7d950a | 1141 | unsigned long now = jiffies; |
1da177e4 LT |
1142 | |
1143 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
3110ff80 | 1144 | __func__, inode->i_sb->s_id, inode->i_ino, |
1da177e4 LT |
1145 | atomic_read(&inode->i_count), fattr->valid); |
1146 | ||
9e6e70f8 | 1147 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
325cfed9 | 1148 | goto out_fileid; |
1da177e4 LT |
1149 | |
1150 | /* | |
1151 | * Make sure the inode's type hasn't changed. | |
1152 | */ | |
9e6e70f8 | 1153 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1154 | goto out_changed; |
1155 | ||
8b4bdcf8 | 1156 | server = NFS_SERVER(inode); |
a0356862 | 1157 | /* Update the fsid? */ |
9e6e70f8 | 1158 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 TM |
1159 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
1160 | !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags)) | |
8b4bdcf8 TM |
1161 | server->fsid = fattr->fsid; |
1162 | ||
1da177e4 LT |
1163 | /* |
1164 | * Update the read time so we don't revalidate too often. | |
1165 | */ | |
33801147 | 1166 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1167 | |
9e6e70f8 TM |
1168 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) || (fattr->valid & (NFS_ATTR_FATTR_MTIME|NFS_ATTR_FATTR_CTIME))) |
1169 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1170 | | NFS_INO_INVALID_ATIME | |
1171 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1172 | |
a895b4a1 TM |
1173 | /* Do atomic weak cache consistency updates */ |
1174 | nfs_wcc_update_inode(inode, fattr); | |
1175 | ||
47aabaa7 | 1176 | /* More cache consistency checks */ |
9e6e70f8 TM |
1177 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
1178 | if (nfsi->change_attr != fattr->change_attr) { | |
1179 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
1180 | inode->i_sb->s_id, inode->i_ino); | |
1181 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1182 | if (S_ISDIR(inode->i_mode)) | |
1183 | nfs_force_lookup_revalidate(inode); | |
1184 | nfsi->change_attr = fattr->change_attr; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
47aabaa7 TM |
1189 | /* NFSv2/v3: Check if the mtime agrees */ |
1190 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { | |
1191 | dprintk("NFS: mtime change on server for file %s/%ld\n", | |
1192 | inode->i_sb->s_id, inode->i_ino); | |
1193 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
bfc69a45 TM |
1194 | if (S_ISDIR(inode->i_mode)) |
1195 | nfs_force_lookup_revalidate(inode); | |
9e6e70f8 | 1196 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
47aabaa7 | 1197 | } |
9e6e70f8 TM |
1198 | } |
1199 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { | |
47aabaa7 | 1200 | /* If ctime has changed we should definitely clear access+acl caches */ |
37d9d76d | 1201 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
4704f0e2 | 1202 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
37d9d76d N |
1203 | /* and probably clear data for a directory too as utimes can cause |
1204 | * havoc with our cache. | |
1205 | */ | |
1206 | if (S_ISDIR(inode->i_mode)) { | |
1207 | invalid |= NFS_INO_INVALID_DATA; | |
1208 | nfs_force_lookup_revalidate(inode); | |
1209 | } | |
9e6e70f8 | 1210 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
37d9d76d | 1211 | } |
47aabaa7 TM |
1212 | } |
1213 | ||
951a143b | 1214 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1215 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1216 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1217 | cur_isize = i_size_read(inode); | |
1218 | if (new_isize != cur_isize) { | |
1219 | /* Do we perhaps have any outstanding writes, or has | |
1220 | * the file grown beyond our last write? */ | |
1221 | if (nfsi->npages == 0 || new_isize > cur_isize) { | |
1222 | i_size_write(inode, new_isize); | |
1223 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1224 | } | |
1225 | dprintk("NFS: isize change on server for file %s/%ld\n", | |
1226 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 LT |
1227 | } |
1228 | } | |
1229 | ||
1da177e4 | 1230 | |
9e6e70f8 TM |
1231 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1232 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
1da177e4 | 1233 | |
9e6e70f8 TM |
1234 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1235 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
1236 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1237 | inode->i_mode = fattr->mode; | |
1238 | } | |
1239 | } | |
1240 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { | |
1241 | if (inode->i_uid != fattr->uid) { | |
1242 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1243 | inode->i_uid = fattr->uid; | |
1244 | } | |
1245 | } | |
1246 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { | |
1247 | if (inode->i_gid != fattr->gid) { | |
1248 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1249 | inode->i_gid = fattr->gid; | |
1250 | } | |
37d9d76d | 1251 | } |
921615f1 | 1252 | |
9e6e70f8 TM |
1253 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1254 | if (inode->i_nlink != fattr->nlink) { | |
1255 | invalid |= NFS_INO_INVALID_ATTR; | |
1256 | if (S_ISDIR(inode->i_mode)) | |
1257 | invalid |= NFS_INO_INVALID_DATA; | |
1258 | inode->i_nlink = fattr->nlink; | |
1259 | } | |
1260 | } | |
1da177e4 | 1261 | |
9e6e70f8 | 1262 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1263 | /* |
1264 | * report the blocks in 512byte units | |
1265 | */ | |
1266 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 1267 | } |
9e6e70f8 TM |
1268 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
1269 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1270 | |
1271 | /* Update attrtimeo value if we're out of the unstable period */ | |
1272 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1273 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1274 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1275 | nfsi->attrtimeo_timestamp = now; |
4704f0e2 | 1276 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1277 | } else { |
64672d55 | 1278 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
6d2b2966 TM |
1279 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
1280 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1281 | nfsi->attrtimeo_timestamp = now; | |
1282 | } | |
1da177e4 | 1283 | } |
f2115dc9 | 1284 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1285 | /* Don't invalidate the data if we were to blame */ |
1286 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1287 | || S_ISLNK(inode->i_mode))) | |
1288 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce TM |
1289 | if (!nfs_have_delegation(inode, FMODE_READ) || |
1290 | (nfsi->cache_validity & NFS_INO_REVAL_FORCED)) | |
55296809 | 1291 | nfsi->cache_validity |= invalid; |
412c77ce | 1292 | nfsi->cache_validity &= ~NFS_INO_REVAL_FORCED; |
1da177e4 LT |
1293 | |
1294 | return 0; | |
1295 | out_changed: | |
1296 | /* | |
1297 | * Big trouble! The inode has become a different object. | |
1298 | */ | |
1da177e4 | 1299 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
3110ff80 | 1300 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
b37b03b7 | 1301 | out_err: |
1da177e4 LT |
1302 | /* |
1303 | * No need to worry about unhashing the dentry, as the | |
1304 | * lookup validation will know that the inode is bad. | |
1305 | * (But we fall through to invalidate the caches.) | |
1306 | */ | |
1307 | nfs_invalidate_inode(inode); | |
1da177e4 | 1308 | return -ESTALE; |
325cfed9 CL |
1309 | |
1310 | out_fileid: | |
1311 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1312 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
54ceac45 | 1313 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
325cfed9 CL |
1314 | (long long)nfsi->fileid, (long long)fattr->fileid); |
1315 | goto out_err; | |
1da177e4 LT |
1316 | } |
1317 | ||
55a97593 | 1318 | |
1da177e4 LT |
1319 | #ifdef CONFIG_NFS_V4 |
1320 | ||
1da177e4 LT |
1321 | /* |
1322 | * Clean out any remaining NFSv4 state that might be left over due | |
1323 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1324 | * nfs_open(). | |
1325 | */ | |
f7b422b1 | 1326 | void nfs4_clear_inode(struct inode *inode) |
1da177e4 | 1327 | { |
1da177e4 | 1328 | /* If we are holding a delegation, return it! */ |
e6f81075 | 1329 | nfs_inode_return_delegation_noreclaim(inode); |
1da177e4 LT |
1330 | /* First call standard NFS clear_inode() code */ |
1331 | nfs_clear_inode(inode); | |
1da177e4 | 1332 | } |
1da177e4 LT |
1333 | #endif |
1334 | ||
f7b422b1 | 1335 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1336 | { |
1337 | struct nfs_inode *nfsi; | |
e94b1766 | 1338 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1339 | if (!nfsi) |
1340 | return NULL; | |
55296809 CL |
1341 | nfsi->flags = 0UL; |
1342 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1343 | #ifdef CONFIG_NFS_V3_ACL |
1344 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1345 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1346 | #endif | |
e50a1c2e BF |
1347 | #ifdef CONFIG_NFS_V4 |
1348 | nfsi->nfs4_acl = NULL; | |
1349 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1350 | return &nfsi->vfs_inode; |
1351 | } | |
1352 | ||
f7b422b1 | 1353 | void nfs_destroy_inode(struct inode *inode) |
1da177e4 LT |
1354 | { |
1355 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
1356 | } | |
1357 | ||
d75d5414 AM |
1358 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1359 | { | |
1360 | #ifdef CONFIG_NFS_V4 | |
1361 | INIT_LIST_HEAD(&nfsi->open_states); | |
1362 | nfsi->delegation = NULL; | |
1363 | nfsi->delegation_state = 0; | |
1364 | init_rwsem(&nfsi->rwsem); | |
1365 | #endif | |
1366 | } | |
f7b422b1 | 1367 | |
51cc5068 | 1368 | static void init_once(void *foo) |
1da177e4 LT |
1369 | { |
1370 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1371 | ||
a35afb83 | 1372 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1373 | INIT_LIST_HEAD(&nfsi->open_files); |
1374 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1375 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
1376 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
a35afb83 | 1377 | nfsi->npages = 0; |
565277f6 TM |
1378 | atomic_set(&nfsi->silly_count, 1); |
1379 | INIT_HLIST_HEAD(&nfsi->silly_list); | |
1380 | init_waitqueue_head(&nfsi->waitqueue); | |
a35afb83 | 1381 | nfs4_init_once(nfsi); |
1da177e4 | 1382 | } |
20c2df83 | 1383 | |
f7b422b1 | 1384 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1385 | { |
1386 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1387 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1388 | 0, (SLAB_RECLAIM_ACCOUNT| |
1389 | SLAB_MEM_SPREAD), | |
20c2df83 | 1390 | init_once); |
1da177e4 LT |
1391 | if (nfs_inode_cachep == NULL) |
1392 | return -ENOMEM; | |
1393 | ||
1394 | return 0; | |
1395 | } | |
1396 | ||
266bee88 | 1397 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1398 | { |
1a1d92c1 | 1399 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1400 | } |
1401 | ||
5746006f TM |
1402 | struct workqueue_struct *nfsiod_workqueue; |
1403 | ||
1404 | /* | |
1405 | * start up the nfsiod workqueue | |
1406 | */ | |
1407 | static int nfsiod_start(void) | |
1408 | { | |
1409 | struct workqueue_struct *wq; | |
1410 | dprintk("RPC: creating workqueue nfsiod\n"); | |
1411 | wq = create_singlethread_workqueue("nfsiod"); | |
1412 | if (wq == NULL) | |
1413 | return -ENOMEM; | |
1414 | nfsiod_workqueue = wq; | |
1415 | return 0; | |
1416 | } | |
1417 | ||
1418 | /* | |
1419 | * Destroy the nfsiod workqueue | |
1420 | */ | |
1421 | static void nfsiod_stop(void) | |
1422 | { | |
1423 | struct workqueue_struct *wq; | |
1424 | ||
1425 | wq = nfsiod_workqueue; | |
1426 | if (wq == NULL) | |
1427 | return; | |
1428 | nfsiod_workqueue = NULL; | |
1429 | destroy_workqueue(wq); | |
1430 | } | |
1431 | ||
1da177e4 LT |
1432 | /* |
1433 | * Initialize NFS | |
1434 | */ | |
1435 | static int __init init_nfs_fs(void) | |
1436 | { | |
1437 | int err; | |
1438 | ||
5746006f TM |
1439 | err = nfsiod_start(); |
1440 | if (err) | |
1441 | goto out6; | |
1442 | ||
6aaca566 DH |
1443 | err = nfs_fs_proc_init(); |
1444 | if (err) | |
1445 | goto out5; | |
1446 | ||
1da177e4 LT |
1447 | err = nfs_init_nfspagecache(); |
1448 | if (err) | |
1449 | goto out4; | |
1450 | ||
1451 | err = nfs_init_inodecache(); | |
1452 | if (err) | |
1453 | goto out3; | |
1454 | ||
1455 | err = nfs_init_readpagecache(); | |
1456 | if (err) | |
1457 | goto out2; | |
1458 | ||
1459 | err = nfs_init_writepagecache(); | |
1460 | if (err) | |
1461 | goto out1; | |
1462 | ||
1da177e4 LT |
1463 | err = nfs_init_directcache(); |
1464 | if (err) | |
1465 | goto out0; | |
1da177e4 LT |
1466 | |
1467 | #ifdef CONFIG_PROC_FS | |
1468 | rpc_proc_register(&nfs_rpcstat); | |
1469 | #endif | |
f7b422b1 | 1470 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1471 | goto out; |
1472 | return 0; | |
1473 | out: | |
1474 | #ifdef CONFIG_PROC_FS | |
1475 | rpc_proc_unregister("nfs"); | |
1476 | #endif | |
1da177e4 | 1477 | nfs_destroy_directcache(); |
6b59a754 | 1478 | out0: |
6b59a754 | 1479 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1480 | out1: |
1481 | nfs_destroy_readpagecache(); | |
1482 | out2: | |
1483 | nfs_destroy_inodecache(); | |
1484 | out3: | |
1485 | nfs_destroy_nfspagecache(); | |
1486 | out4: | |
6aaca566 DH |
1487 | nfs_fs_proc_exit(); |
1488 | out5: | |
5746006f TM |
1489 | nfsiod_stop(); |
1490 | out6: | |
1da177e4 LT |
1491 | return err; |
1492 | } | |
1493 | ||
1494 | static void __exit exit_nfs_fs(void) | |
1495 | { | |
1da177e4 | 1496 | nfs_destroy_directcache(); |
1da177e4 LT |
1497 | nfs_destroy_writepagecache(); |
1498 | nfs_destroy_readpagecache(); | |
1499 | nfs_destroy_inodecache(); | |
1500 | nfs_destroy_nfspagecache(); | |
1501 | #ifdef CONFIG_PROC_FS | |
1502 | rpc_proc_unregister("nfs"); | |
1503 | #endif | |
f7b422b1 | 1504 | unregister_nfs_fs(); |
6aaca566 | 1505 | nfs_fs_proc_exit(); |
5746006f | 1506 | nfsiod_stop(); |
1da177e4 LT |
1507 | } |
1508 | ||
1509 | /* Not quite true; I just maintain it */ | |
1510 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1511 | MODULE_LICENSE("GPL"); | |
f43bf0be | 1512 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
1513 | |
1514 | module_init(init_nfs_fs) | |
1515 | module_exit(exit_nfs_fs) |