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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 | * | |
8 | * Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some | |
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> | |
18 | ||
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 | |
51 | #define NFS_PARANOIA 1 | |
52 | ||
1da177e4 | 53 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 54 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 55 | |
ada70d94 | 56 | static void nfs_zap_acl_cache(struct inode *); |
1da177e4 | 57 | |
f7b422b1 | 58 | static kmem_cache_t * nfs_inode_cachep; |
b7fa0554 | 59 | |
1da177e4 LT |
60 | static inline unsigned long |
61 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
62 | { | |
63 | return nfs_fileid_to_ino_t(fattr->fileid); | |
64 | } | |
65 | ||
f7b422b1 | 66 | int nfs_write_inode(struct inode *inode, int sync) |
1da177e4 | 67 | { |
c42de9dd | 68 | int flags = sync ? FLUSH_SYNC : 0; |
1da177e4 LT |
69 | int ret; |
70 | ||
3da28eb1 | 71 | ret = nfs_commit_inode(inode, flags); |
1da177e4 LT |
72 | if (ret < 0) |
73 | return ret; | |
74 | return 0; | |
75 | } | |
76 | ||
f7b422b1 | 77 | void nfs_clear_inode(struct inode *inode) |
1da177e4 LT |
78 | { |
79 | struct nfs_inode *nfsi = NFS_I(inode); | |
80 | struct rpc_cred *cred; | |
81 | ||
da6d503a TM |
82 | /* |
83 | * The following should never happen... | |
84 | */ | |
85 | BUG_ON(nfs_have_writebacks(inode)); | |
1da177e4 | 86 | BUG_ON (!list_empty(&nfsi->open_files)); |
ada70d94 | 87 | nfs_zap_acl_cache(inode); |
1da177e4 LT |
88 | cred = nfsi->cache_access.cred; |
89 | if (cred) | |
90 | put_rpccred(cred); | |
91 | BUG_ON(atomic_read(&nfsi->data_updates) != 0); | |
92 | } | |
93 | ||
29884df0 TM |
94 | /** |
95 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
96 | */ | |
97 | int nfs_sync_mapping(struct address_space *mapping) | |
98 | { | |
99 | int ret; | |
100 | ||
101 | if (mapping->nrpages == 0) | |
102 | return 0; | |
103 | unmap_mapping_range(mapping, 0, 0, 0); | |
28fd1298 | 104 | ret = filemap_write_and_wait(mapping); |
29884df0 TM |
105 | if (ret != 0) |
106 | goto out; | |
107 | ret = nfs_wb_all(mapping->host); | |
108 | out: | |
109 | return ret; | |
110 | } | |
111 | ||
1da177e4 LT |
112 | /* |
113 | * Invalidate the local caches | |
114 | */ | |
b37b03b7 | 115 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
116 | { |
117 | struct nfs_inode *nfsi = NFS_I(inode); | |
118 | int mode = inode->i_mode; | |
119 | ||
91d5b470 CL |
120 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
121 | ||
1da177e4 LT |
122 | NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode); |
123 | NFS_ATTRTIMEO_UPDATE(inode) = jiffies; | |
124 | ||
125 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
126 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 127 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 128 | else |
55296809 | 129 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 130 | } |
dc59250c | 131 | |
b37b03b7 TM |
132 | void nfs_zap_caches(struct inode *inode) |
133 | { | |
134 | spin_lock(&inode->i_lock); | |
135 | nfs_zap_caches_locked(inode); | |
dc59250c | 136 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
137 | } |
138 | ||
139 | static void nfs_zap_acl_cache(struct inode *inode) | |
140 | { | |
141 | void (*clear_acl_cache)(struct inode *); | |
142 | ||
143 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
144 | if (clear_acl_cache != NULL) | |
145 | clear_acl_cache(inode); | |
dc59250c | 146 | spin_lock(&inode->i_lock); |
55296809 | 147 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 148 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
149 | } |
150 | ||
151 | /* | |
b37b03b7 TM |
152 | * Invalidate, but do not unhash, the inode. |
153 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 154 | */ |
b37b03b7 | 155 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 156 | { |
b37b03b7 TM |
157 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
158 | nfs_zap_caches_locked(inode); | |
1da177e4 LT |
159 | } |
160 | ||
161 | struct nfs_find_desc { | |
162 | struct nfs_fh *fh; | |
163 | struct nfs_fattr *fattr; | |
164 | }; | |
165 | ||
166 | /* | |
167 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
168 | * this, and re-exported directories (also seen in NFSv2) | |
169 | * we are forced to allow 2 different inodes to have the same | |
170 | * i_ino. | |
171 | */ | |
172 | static int | |
173 | nfs_find_actor(struct inode *inode, void *opaque) | |
174 | { | |
175 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
176 | struct nfs_fh *fh = desc->fh; | |
177 | struct nfs_fattr *fattr = desc->fattr; | |
178 | ||
179 | if (NFS_FILEID(inode) != fattr->fileid) | |
180 | return 0; | |
181 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
182 | return 0; | |
183 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
184 | return 0; | |
185 | return 1; | |
186 | } | |
187 | ||
188 | static int | |
189 | nfs_init_locked(struct inode *inode, void *opaque) | |
190 | { | |
191 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
192 | struct nfs_fattr *fattr = desc->fattr; | |
193 | ||
194 | NFS_FILEID(inode) = fattr->fileid; | |
195 | nfs_copy_fh(NFS_FH(inode), desc->fh); | |
196 | return 0; | |
197 | } | |
198 | ||
199 | /* Don't use READDIRPLUS on directories that we believe are too large */ | |
200 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) | |
201 | ||
202 | /* | |
203 | * This is our front-end to iget that looks up inodes by file handle | |
204 | * instead of inode number. | |
205 | */ | |
206 | struct inode * | |
207 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
208 | { | |
209 | struct nfs_find_desc desc = { | |
210 | .fh = fh, | |
211 | .fattr = fattr | |
212 | }; | |
03f28e3a | 213 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
214 | unsigned long hash; |
215 | ||
216 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
217 | goto out_no_inode; | |
218 | ||
219 | if (!fattr->nlink) { | |
220 | printk("NFS: Buggy server - nlink == 0!\n"); | |
221 | goto out_no_inode; | |
222 | } | |
223 | ||
224 | hash = nfs_fattr_to_ino_t(fattr); | |
225 | ||
03f28e3a TM |
226 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
227 | if (inode == NULL) { | |
228 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 229 | goto out_no_inode; |
03f28e3a | 230 | } |
1da177e4 LT |
231 | |
232 | if (inode->i_state & I_NEW) { | |
233 | struct nfs_inode *nfsi = NFS_I(inode); | |
234 | ||
235 | /* We set i_ino for the few things that still rely on it, | |
236 | * such as stat(2) */ | |
237 | inode->i_ino = hash; | |
238 | ||
239 | /* We can't support update_atime(), since the server will reset it */ | |
240 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
241 | inode->i_mode = fattr->mode; | |
242 | /* Why so? Because we want revalidate for devices/FIFOs, and | |
243 | * that's precisely what we have in nfs_file_inode_operations. | |
244 | */ | |
92cfc62c | 245 | inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops; |
1da177e4 LT |
246 | if (S_ISREG(inode->i_mode)) { |
247 | inode->i_fop = &nfs_file_operations; | |
248 | inode->i_data.a_ops = &nfs_file_aops; | |
249 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
250 | } else if (S_ISDIR(inode->i_mode)) { | |
251 | inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops; | |
252 | inode->i_fop = &nfs_dir_operations; | |
253 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) | |
254 | && fattr->size <= NFS_LIMIT_READDIRPLUS) | |
412d582e | 255 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
55a97593 TM |
256 | /* Deal with crossing mountpoints */ |
257 | if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { | |
6b97fd3d MN |
258 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
259 | inode->i_op = &nfs_referral_inode_operations; | |
260 | else | |
261 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 TM |
262 | inode->i_fop = NULL; |
263 | } | |
1da177e4 LT |
264 | } else if (S_ISLNK(inode->i_mode)) |
265 | inode->i_op = &nfs_symlink_inode_operations; | |
266 | else | |
267 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
268 | ||
33801147 TM |
269 | nfsi->read_cache_jiffies = fattr->time_start; |
270 | nfsi->last_updated = jiffies; | |
1da177e4 LT |
271 | inode->i_atime = fattr->atime; |
272 | inode->i_mtime = fattr->mtime; | |
273 | inode->i_ctime = fattr->ctime; | |
274 | if (fattr->valid & NFS_ATTR_FATTR_V4) | |
275 | nfsi->change_attr = fattr->change_attr; | |
276 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
277 | inode->i_nlink = fattr->nlink; | |
278 | inode->i_uid = fattr->uid; | |
279 | inode->i_gid = fattr->gid; | |
280 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
281 | /* | |
282 | * report the blocks in 512byte units | |
283 | */ | |
284 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
285 | inode->i_blksize = inode->i_sb->s_blocksize; | |
286 | } else { | |
287 | inode->i_blocks = fattr->du.nfs2.blocks; | |
288 | inode->i_blksize = fattr->du.nfs2.blocksize; | |
289 | } | |
290 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
291 | nfsi->attrtimeo_timestamp = jiffies; | |
292 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
293 | nfsi->cache_access.cred = NULL; | |
294 | ||
295 | unlock_new_inode(inode); | |
296 | } else | |
297 | nfs_refresh_inode(inode, fattr); | |
298 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
299 | inode->i_sb->s_id, | |
300 | (long long)NFS_FILEID(inode), | |
301 | atomic_read(&inode->i_count)); | |
302 | ||
303 | out: | |
304 | return inode; | |
305 | ||
306 | out_no_inode: | |
03f28e3a | 307 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
308 | goto out; |
309 | } | |
310 | ||
311 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET) | |
312 | ||
313 | int | |
314 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
315 | { | |
316 | struct inode *inode = dentry->d_inode; | |
317 | struct nfs_fattr fattr; | |
318 | int error; | |
319 | ||
91d5b470 CL |
320 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
321 | ||
1da177e4 LT |
322 | if (attr->ia_valid & ATTR_SIZE) { |
323 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
324 | attr->ia_valid &= ~ATTR_SIZE; | |
325 | } | |
326 | ||
327 | /* Optimization: if the end result is no change, don't RPC */ | |
328 | attr->ia_valid &= NFS_VALID_ATTRS; | |
329 | if (attr->ia_valid == 0) | |
330 | return 0; | |
331 | ||
332 | lock_kernel(); | |
333 | nfs_begin_data_update(inode); | |
755c1e20 TM |
334 | /* Write all dirty data */ |
335 | filemap_write_and_wait(inode->i_mapping); | |
336 | nfs_wb_all(inode); | |
642ac549 TM |
337 | /* |
338 | * Return any delegations if we're going to change ACLs | |
339 | */ | |
340 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
341 | nfs_inode_return_delegation(inode); | |
1da177e4 | 342 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
65e4308d | 343 | if (error == 0) |
1da177e4 | 344 | nfs_refresh_inode(inode, &fattr); |
65e4308d TM |
345 | nfs_end_data_update(inode); |
346 | unlock_kernel(); | |
347 | return error; | |
348 | } | |
349 | ||
350 | /** | |
351 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
352 | * @inode: pointer to struct inode | |
353 | * @attr: pointer to struct iattr | |
354 | * | |
355 | * Note: we do this in the *proc.c in order to ensure that | |
356 | * it works for things like exclusive creates too. | |
357 | */ | |
358 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
359 | { | |
360 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
1da177e4 | 361 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
362 | int mode = attr->ia_mode & S_IALLUGO; |
363 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
364 | inode->i_mode = mode; |
365 | } | |
366 | if ((attr->ia_valid & ATTR_UID) != 0) | |
367 | inode->i_uid = attr->ia_uid; | |
368 | if ((attr->ia_valid & ATTR_GID) != 0) | |
369 | inode->i_gid = attr->ia_gid; | |
dc59250c | 370 | spin_lock(&inode->i_lock); |
55296809 | 371 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 372 | spin_unlock(&inode->i_lock); |
65e4308d TM |
373 | } |
374 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 375 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
65e4308d TM |
376 | inode->i_size = attr->ia_size; |
377 | vmtruncate(inode, attr->ia_size); | |
378 | } | |
1da177e4 LT |
379 | } |
380 | ||
412d582e CL |
381 | static int nfs_wait_schedule(void *word) |
382 | { | |
383 | if (signal_pending(current)) | |
384 | return -ERESTARTSYS; | |
385 | schedule(); | |
386 | return 0; | |
387 | } | |
388 | ||
1da177e4 LT |
389 | /* |
390 | * Wait for the inode to get unlocked. | |
1da177e4 | 391 | */ |
412d582e | 392 | static int nfs_wait_on_inode(struct inode *inode) |
1da177e4 LT |
393 | { |
394 | struct rpc_clnt *clnt = NFS_CLIENT(inode); | |
395 | struct nfs_inode *nfsi = NFS_I(inode); | |
412d582e | 396 | sigset_t oldmask; |
1da177e4 | 397 | int error; |
412d582e | 398 | |
412d582e CL |
399 | rpc_clnt_sigmask(clnt, &oldmask); |
400 | error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING, | |
401 | nfs_wait_schedule, TASK_INTERRUPTIBLE); | |
402 | rpc_clnt_sigunmask(clnt, &oldmask); | |
412d582e | 403 | |
1da177e4 LT |
404 | return error; |
405 | } | |
406 | ||
412d582e CL |
407 | static void nfs_wake_up_inode(struct inode *inode) |
408 | { | |
409 | struct nfs_inode *nfsi = NFS_I(inode); | |
410 | ||
411 | clear_bit(NFS_INO_REVALIDATING, &nfsi->flags); | |
412 | smp_mb__after_clear_bit(); | |
413 | wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING); | |
414 | } | |
415 | ||
1da177e4 LT |
416 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
417 | { | |
418 | struct inode *inode = dentry->d_inode; | |
55296809 | 419 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
420 | int err; |
421 | ||
70b9ecbd | 422 | /* Flush out writes to the server in order to update c/mtime */ |
c42de9dd | 423 | nfs_sync_inode_wait(inode, 0, 0, FLUSH_NOCOMMIT); |
fc33a7bb CH |
424 | |
425 | /* | |
426 | * We may force a getattr if the user cares about atime. | |
427 | * | |
428 | * Note that we only have to check the vfsmount flags here: | |
429 | * - NFS always sets S_NOATIME by so checking it would give a | |
430 | * bogus result | |
431 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
432 | * no point in checking those. | |
433 | */ | |
434 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
435 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 436 | need_atime = 0; |
fc33a7bb | 437 | |
1da177e4 LT |
438 | if (need_atime) |
439 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
440 | else | |
441 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
442 | if (!err) | |
443 | generic_fillattr(inode, stat); | |
444 | return err; | |
445 | } | |
446 | ||
b92dccf6 | 447 | static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred) |
1da177e4 LT |
448 | { |
449 | struct nfs_open_context *ctx; | |
450 | ||
451 | ctx = (struct nfs_open_context *)kmalloc(sizeof(*ctx), GFP_KERNEL); | |
452 | if (ctx != NULL) { | |
453 | atomic_set(&ctx->count, 1); | |
454 | ctx->dentry = dget(dentry); | |
b92dccf6 | 455 | ctx->vfsmnt = mntget(mnt); |
1da177e4 LT |
456 | ctx->cred = get_rpccred(cred); |
457 | ctx->state = NULL; | |
458 | ctx->lockowner = current->files; | |
459 | ctx->error = 0; | |
00a92642 | 460 | ctx->dir_cookie = 0; |
1da177e4 LT |
461 | } |
462 | return ctx; | |
463 | } | |
464 | ||
465 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
466 | { | |
467 | if (ctx != NULL) | |
468 | atomic_inc(&ctx->count); | |
469 | return ctx; | |
470 | } | |
471 | ||
472 | void put_nfs_open_context(struct nfs_open_context *ctx) | |
473 | { | |
474 | if (atomic_dec_and_test(&ctx->count)) { | |
475 | if (!list_empty(&ctx->list)) { | |
476 | struct inode *inode = ctx->dentry->d_inode; | |
477 | spin_lock(&inode->i_lock); | |
478 | list_del(&ctx->list); | |
479 | spin_unlock(&inode->i_lock); | |
480 | } | |
481 | if (ctx->state != NULL) | |
482 | nfs4_close_state(ctx->state, ctx->mode); | |
483 | if (ctx->cred != NULL) | |
484 | put_rpccred(ctx->cred); | |
485 | dput(ctx->dentry); | |
b92dccf6 | 486 | mntput(ctx->vfsmnt); |
1da177e4 LT |
487 | kfree(ctx); |
488 | } | |
489 | } | |
490 | ||
491 | /* | |
492 | * Ensure that mmap has a recent RPC credential for use when writing out | |
493 | * shared pages | |
494 | */ | |
b92dccf6 | 495 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 LT |
496 | { |
497 | struct inode *inode = filp->f_dentry->d_inode; | |
498 | struct nfs_inode *nfsi = NFS_I(inode); | |
499 | ||
500 | filp->private_data = get_nfs_open_context(ctx); | |
501 | spin_lock(&inode->i_lock); | |
502 | list_add(&ctx->list, &nfsi->open_files); | |
503 | spin_unlock(&inode->i_lock); | |
504 | } | |
505 | ||
d530838b TM |
506 | /* |
507 | * Given an inode, search for an open context with the desired characteristics | |
508 | */ | |
509 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode) | |
1da177e4 LT |
510 | { |
511 | struct nfs_inode *nfsi = NFS_I(inode); | |
512 | struct nfs_open_context *pos, *ctx = NULL; | |
513 | ||
514 | spin_lock(&inode->i_lock); | |
515 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
516 | if (cred != NULL && pos->cred != cred) |
517 | continue; | |
1da177e4 LT |
518 | if ((pos->mode & mode) == mode) { |
519 | ctx = get_nfs_open_context(pos); | |
520 | break; | |
521 | } | |
522 | } | |
523 | spin_unlock(&inode->i_lock); | |
524 | return ctx; | |
525 | } | |
526 | ||
b92dccf6 | 527 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 LT |
528 | { |
529 | struct inode *inode = filp->f_dentry->d_inode; | |
530 | struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data; | |
531 | ||
532 | if (ctx) { | |
533 | filp->private_data = NULL; | |
534 | spin_lock(&inode->i_lock); | |
535 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
536 | spin_unlock(&inode->i_lock); | |
537 | put_nfs_open_context(ctx); | |
538 | } | |
539 | } | |
540 | ||
541 | /* | |
542 | * These allocate and release file read/write context information. | |
543 | */ | |
544 | int nfs_open(struct inode *inode, struct file *filp) | |
545 | { | |
546 | struct nfs_open_context *ctx; | |
547 | struct rpc_cred *cred; | |
548 | ||
549 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); | |
550 | if (IS_ERR(cred)) | |
551 | return PTR_ERR(cred); | |
b92dccf6 | 552 | ctx = alloc_nfs_open_context(filp->f_vfsmnt, filp->f_dentry, cred); |
1da177e4 LT |
553 | put_rpccred(cred); |
554 | if (ctx == NULL) | |
555 | return -ENOMEM; | |
556 | ctx->mode = filp->f_mode; | |
557 | nfs_file_set_open_context(filp, ctx); | |
558 | put_nfs_open_context(ctx); | |
1da177e4 LT |
559 | return 0; |
560 | } | |
561 | ||
562 | int nfs_release(struct inode *inode, struct file *filp) | |
563 | { | |
1da177e4 LT |
564 | nfs_file_clear_open_context(filp); |
565 | return 0; | |
566 | } | |
567 | ||
568 | /* | |
569 | * This function is called whenever some part of NFS notices that | |
570 | * the cached attributes have to be refreshed. | |
571 | */ | |
572 | int | |
573 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
574 | { | |
575 | int status = -ESTALE; | |
576 | struct nfs_fattr fattr; | |
577 | struct nfs_inode *nfsi = NFS_I(inode); | |
1da177e4 LT |
578 | |
579 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
580 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
581 | ||
1842bfb4 | 582 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
1da177e4 LT |
583 | lock_kernel(); |
584 | if (!inode || is_bad_inode(inode)) | |
585 | goto out_nowait; | |
586 | if (NFS_STALE(inode)) | |
587 | goto out_nowait; | |
588 | ||
412d582e CL |
589 | status = nfs_wait_on_inode(inode); |
590 | if (status < 0) | |
591 | goto out; | |
592 | if (NFS_STALE(inode)) { | |
593 | status = -ESTALE; | |
594 | /* Do we trust the cached ESTALE? */ | |
595 | if (NFS_ATTRTIMEO(inode) != 0) { | |
44b11874 | 596 | if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME)) { |
412d582e CL |
597 | /* no */ |
598 | } else | |
599 | goto out; | |
600 | } | |
1da177e4 | 601 | } |
1da177e4 | 602 | |
1da177e4 LT |
603 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
604 | if (status != 0) { | |
605 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
606 | inode->i_sb->s_id, | |
607 | (long long)NFS_FILEID(inode), status); | |
608 | if (status == -ESTALE) { | |
609 | nfs_zap_caches(inode); | |
610 | if (!S_ISDIR(inode->i_mode)) | |
412d582e | 611 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
1da177e4 LT |
612 | } |
613 | goto out; | |
614 | } | |
615 | ||
33801147 | 616 | spin_lock(&inode->i_lock); |
24aa1fe6 | 617 | status = nfs_update_inode(inode, &fattr); |
1da177e4 | 618 | if (status) { |
33801147 | 619 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
620 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
621 | inode->i_sb->s_id, | |
622 | (long long)NFS_FILEID(inode), status); | |
623 | goto out; | |
624 | } | |
dc59250c | 625 | spin_unlock(&inode->i_lock); |
55296809 | 626 | |
24aa1fe6 | 627 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 628 | nfs_zap_acl_cache(inode); |
55296809 | 629 | |
1da177e4 LT |
630 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
631 | inode->i_sb->s_id, | |
632 | (long long)NFS_FILEID(inode)); | |
633 | ||
412d582e CL |
634 | out: |
635 | nfs_wake_up_inode(inode); | |
636 | ||
1da177e4 LT |
637 | out_nowait: |
638 | unlock_kernel(); | |
639 | return status; | |
640 | } | |
641 | ||
642 | int nfs_attribute_timeout(struct inode *inode) | |
643 | { | |
644 | struct nfs_inode *nfsi = NFS_I(inode); | |
645 | ||
646 | if (nfs_have_delegation(inode, FMODE_READ)) | |
647 | return 0; | |
648 | return time_after(jiffies, nfsi->read_cache_jiffies+nfsi->attrtimeo); | |
649 | } | |
650 | ||
651 | /** | |
652 | * nfs_revalidate_inode - Revalidate the inode attributes | |
653 | * @server - pointer to nfs_server struct | |
654 | * @inode - pointer to inode struct | |
655 | * | |
656 | * Updates inode attribute information by retrieving the data from the server. | |
657 | */ | |
658 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
659 | { | |
44b11874 | 660 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
1da177e4 LT |
661 | && !nfs_attribute_timeout(inode)) |
662 | return NFS_STALE(inode) ? -ESTALE : 0; | |
663 | return __nfs_revalidate_inode(server, inode); | |
664 | } | |
665 | ||
7d52e862 TM |
666 | /** |
667 | * nfs_revalidate_mapping - Revalidate the pagecache | |
668 | * @inode - pointer to host inode | |
669 | * @mapping - pointer to mapping | |
670 | */ | |
44b11874 | 671 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) |
7d52e862 TM |
672 | { |
673 | struct nfs_inode *nfsi = NFS_I(inode); | |
44b11874 TM |
674 | int ret = 0; |
675 | ||
676 | if (NFS_STALE(inode)) | |
677 | ret = -ESTALE; | |
678 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
679 | || nfs_attribute_timeout(inode)) | |
680 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
7d52e862 | 681 | |
55296809 | 682 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) { |
91d5b470 | 683 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
29884df0 TM |
684 | if (S_ISREG(inode->i_mode)) |
685 | nfs_sync_mapping(mapping); | |
7d52e862 | 686 | invalidate_inode_pages2(mapping); |
dc59250c CL |
687 | |
688 | spin_lock(&inode->i_lock); | |
55296809 | 689 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
7d52e862 TM |
690 | if (S_ISDIR(inode->i_mode)) { |
691 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
692 | /* This ensures we revalidate child dentries */ | |
913a70fc | 693 | nfsi->cache_change_attribute = jiffies; |
7d52e862 | 694 | } |
dc59250c CL |
695 | spin_unlock(&inode->i_lock); |
696 | ||
7d52e862 TM |
697 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
698 | inode->i_sb->s_id, | |
699 | (long long)NFS_FILEID(inode)); | |
700 | } | |
44b11874 | 701 | return ret; |
7d52e862 TM |
702 | } |
703 | ||
1da177e4 LT |
704 | /** |
705 | * nfs_begin_data_update | |
706 | * @inode - pointer to inode | |
707 | * Declare that a set of operations will update file data on the server | |
708 | */ | |
709 | void nfs_begin_data_update(struct inode *inode) | |
710 | { | |
711 | atomic_inc(&NFS_I(inode)->data_updates); | |
712 | } | |
713 | ||
714 | /** | |
715 | * nfs_end_data_update | |
716 | * @inode - pointer to inode | |
717 | * Declare end of the operations that will update file data | |
718 | * This will mark the inode as immediately needing revalidation | |
719 | * of its attribute cache. | |
720 | */ | |
721 | void nfs_end_data_update(struct inode *inode) | |
722 | { | |
723 | struct nfs_inode *nfsi = NFS_I(inode); | |
724 | ||
725 | if (!nfs_have_delegation(inode, FMODE_READ)) { | |
decf491f TM |
726 | /* Directories and symlinks: invalidate page cache */ |
727 | if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) { | |
728 | spin_lock(&inode->i_lock); | |
55296809 | 729 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
decf491f TM |
730 | spin_unlock(&inode->i_lock); |
731 | } | |
1da177e4 | 732 | } |
913a70fc | 733 | nfsi->cache_change_attribute = jiffies; |
1da177e4 LT |
734 | atomic_dec(&nfsi->data_updates); |
735 | } | |
736 | ||
a895b4a1 TM |
737 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
738 | { | |
739 | struct nfs_inode *nfsi = NFS_I(inode); | |
740 | ||
a895b4a1 TM |
741 | /* If we have atomic WCC data, we may update some attributes */ |
742 | if ((fattr->valid & NFS_ATTR_WCC) != 0) { | |
743 | if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { | |
744 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
745 | nfsi->cache_change_attribute = jiffies; | |
746 | } | |
747 | if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
748 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); | |
749 | nfsi->cache_change_attribute = jiffies; | |
750 | } | |
751 | if (inode->i_size == fattr->pre_size && nfsi->npages == 0) { | |
752 | inode->i_size = fattr->size; | |
753 | nfsi->cache_change_attribute = jiffies; | |
754 | } | |
755 | } | |
756 | } | |
757 | ||
1da177e4 | 758 | /** |
33801147 | 759 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
760 | * @inode - pointer to inode |
761 | * @fattr - updated attributes | |
762 | * | |
763 | * Verifies the attribute cache. If we have just changed the attributes, | |
764 | * so that fattr carries weak cache consistency data, then it may | |
765 | * also update the ctime/mtime/change_attribute. | |
766 | */ | |
33801147 | 767 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
768 | { |
769 | struct nfs_inode *nfsi = NFS_I(inode); | |
770 | loff_t cur_size, new_isize; | |
771 | int data_unstable; | |
772 | ||
dc59250c | 773 | |
ca62b9c3 TM |
774 | /* Has the inode gone and changed behind our back? */ |
775 | if (nfsi->fileid != fattr->fileid | |
776 | || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { | |
777 | return -EIO; | |
778 | } | |
779 | ||
1da177e4 LT |
780 | /* Are we in the process of updating data on the server? */ |
781 | data_unstable = nfs_caches_unstable(inode); | |
782 | ||
a895b4a1 TM |
783 | /* Do atomic weak cache consistency updates */ |
784 | nfs_wcc_update_inode(inode, fattr); | |
1da177e4 | 785 | |
9d1e9232 | 786 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
f1bb0b92 TM |
787 | nfsi->change_attr != fattr->change_attr) |
788 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1da177e4 | 789 | |
1da177e4 | 790 | /* Verify a few of the more important attributes */ |
f1bb0b92 TM |
791 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) |
792 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
ca62b9c3 TM |
793 | |
794 | cur_size = i_size_read(inode); | |
795 | new_isize = nfs_size_to_loff_t(fattr->size); | |
fb374d24 TM |
796 | if (cur_size != new_isize && nfsi->npages == 0) |
797 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1da177e4 LT |
798 | |
799 | /* Have any file permissions changed? */ | |
800 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) | |
801 | || inode->i_uid != fattr->uid | |
802 | || inode->i_gid != fattr->gid) | |
55296809 | 803 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
804 | |
805 | /* Has the link count changed? */ | |
806 | if (inode->i_nlink != fattr->nlink) | |
55296809 | 807 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
808 | |
809 | if (!timespec_equal(&inode->i_atime, &fattr->atime)) | |
55296809 | 810 | nfsi->cache_validity |= NFS_INO_INVALID_ATIME; |
1da177e4 | 811 | |
33801147 | 812 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
813 | return 0; |
814 | } | |
815 | ||
33801147 TM |
816 | /** |
817 | * nfs_refresh_inode - try to update the inode attribute cache | |
818 | * @inode - pointer to inode | |
819 | * @fattr - updated attributes | |
820 | * | |
821 | * Check that an RPC call that returned attributes has not overlapped with | |
822 | * other recent updates of the inode metadata, then decide whether it is | |
823 | * safe to do a full update of the inode attributes, or whether just to | |
824 | * call nfs_check_inode_attributes. | |
825 | */ | |
826 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
827 | { | |
828 | struct nfs_inode *nfsi = NFS_I(inode); | |
829 | int status; | |
830 | ||
831 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
832 | return 0; | |
833 | spin_lock(&inode->i_lock); | |
33801147 | 834 | if (time_after(fattr->time_start, nfsi->last_updated)) |
24aa1fe6 | 835 | status = nfs_update_inode(inode, fattr); |
33801147 TM |
836 | else |
837 | status = nfs_check_inode_attributes(inode, fattr); | |
838 | ||
839 | spin_unlock(&inode->i_lock); | |
840 | return status; | |
841 | } | |
842 | ||
decf491f TM |
843 | /** |
844 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
845 | * @inode - pointer to inode | |
846 | * @fattr - updated attributes | |
847 | * | |
848 | * After an operation that has changed the inode metadata, mark the | |
849 | * attribute cache as being invalid, then try to update it. | |
850 | */ | |
851 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
852 | { | |
853 | struct nfs_inode *nfsi = NFS_I(inode); | |
854 | int status = 0; | |
855 | ||
856 | spin_lock(&inode->i_lock); | |
857 | if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) { | |
f1bb0b92 | 858 | nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
decf491f TM |
859 | goto out; |
860 | } | |
24aa1fe6 | 861 | status = nfs_update_inode(inode, fattr); |
decf491f TM |
862 | out: |
863 | spin_unlock(&inode->i_lock); | |
864 | return status; | |
865 | } | |
866 | ||
1da177e4 LT |
867 | /* |
868 | * Many nfs protocol calls return the new file attributes after | |
869 | * an operation. Here we update the inode to reflect the state | |
870 | * of the server's inode. | |
871 | * | |
872 | * This is a bit tricky because we have to make sure all dirty pages | |
873 | * have been sent off to the server before calling invalidate_inode_pages. | |
874 | * To make sure no other process adds more write requests while we try | |
875 | * our best to flush them, we make them sleep during the attribute refresh. | |
876 | * | |
877 | * A very similar scenario holds for the dir cache. | |
878 | */ | |
24aa1fe6 | 879 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 880 | { |
8b4bdcf8 | 881 | struct nfs_server *server; |
1da177e4 | 882 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 883 | loff_t cur_isize, new_isize; |
1da177e4 | 884 | unsigned int invalid = 0; |
24aa1fe6 | 885 | int data_stable; |
1da177e4 LT |
886 | |
887 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
888 | __FUNCTION__, inode->i_sb->s_id, inode->i_ino, | |
889 | atomic_read(&inode->i_count), fattr->valid); | |
890 | ||
325cfed9 CL |
891 | if (nfsi->fileid != fattr->fileid) |
892 | goto out_fileid; | |
1da177e4 LT |
893 | |
894 | /* | |
895 | * Make sure the inode's type hasn't changed. | |
896 | */ | |
33801147 | 897 | if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
898 | goto out_changed; |
899 | ||
8b4bdcf8 TM |
900 | server = NFS_SERVER(inode); |
901 | /* Update the fsid if and only if this is the root directory */ | |
902 | if (inode == inode->i_sb->s_root->d_inode | |
903 | && !nfs_fsid_equal(&server->fsid, &fattr->fsid)) | |
904 | server->fsid = fattr->fsid; | |
905 | ||
1da177e4 LT |
906 | /* |
907 | * Update the read time so we don't revalidate too often. | |
908 | */ | |
33801147 TM |
909 | nfsi->read_cache_jiffies = fattr->time_start; |
910 | nfsi->last_updated = jiffies; | |
1da177e4 LT |
911 | |
912 | /* Are we racing with known updates of the metadata on the server? */ | |
24aa1fe6 TM |
913 | data_stable = nfs_verify_change_attribute(inode, fattr->time_start); |
914 | if (data_stable) | |
f1bb0b92 | 915 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATIME); |
1da177e4 | 916 | |
a895b4a1 TM |
917 | /* Do atomic weak cache consistency updates */ |
918 | nfs_wcc_update_inode(inode, fattr); | |
919 | ||
951a143b | 920 | /* Check if our cached file size is stale */ |
1da177e4 LT |
921 | new_isize = nfs_size_to_loff_t(fattr->size); |
922 | cur_isize = i_size_read(inode); | |
951a143b TM |
923 | if (new_isize != cur_isize) { |
924 | /* Do we perhaps have any outstanding writes? */ | |
925 | if (nfsi->npages == 0) { | |
926 | /* No, but did we race with nfs_end_data_update()? */ | |
24aa1fe6 | 927 | if (data_stable) { |
1da177e4 | 928 | inode->i_size = new_isize; |
951a143b | 929 | invalid |= NFS_INO_INVALID_DATA; |
1da177e4 | 930 | } |
951a143b TM |
931 | invalid |= NFS_INO_INVALID_ATTR; |
932 | } else if (new_isize > cur_isize) { | |
1da177e4 LT |
933 | inode->i_size = new_isize; |
934 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
935 | } | |
24aa1fe6 | 936 | nfsi->cache_change_attribute = jiffies; |
951a143b TM |
937 | dprintk("NFS: isize change on server for file %s/%ld\n", |
938 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 LT |
939 | } |
940 | ||
951a143b | 941 | /* Check if the mtime agrees */ |
1da177e4 LT |
942 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
943 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); | |
951a143b TM |
944 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
945 | inode->i_sb->s_id, inode->i_ino); | |
24aa1fe6 TM |
946 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
947 | nfsi->cache_change_attribute = jiffies; | |
1da177e4 LT |
948 | } |
949 | ||
ada70d94 TM |
950 | /* If ctime has changed we should definitely clear access+acl caches */ |
951 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { | |
24aa1fe6 | 952 | invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
ada70d94 | 953 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
24aa1fe6 | 954 | nfsi->cache_change_attribute = jiffies; |
ada70d94 | 955 | } |
1da177e4 LT |
956 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
957 | ||
958 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) || | |
959 | inode->i_uid != fattr->uid || | |
960 | inode->i_gid != fattr->gid) | |
ada70d94 | 961 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1da177e4 LT |
962 | |
963 | inode->i_mode = fattr->mode; | |
964 | inode->i_nlink = fattr->nlink; | |
965 | inode->i_uid = fattr->uid; | |
966 | inode->i_gid = fattr->gid; | |
967 | ||
968 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
969 | /* | |
970 | * report the blocks in 512byte units | |
971 | */ | |
972 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
973 | inode->i_blksize = inode->i_sb->s_blocksize; | |
974 | } else { | |
975 | inode->i_blocks = fattr->du.nfs2.blocks; | |
976 | inode->i_blksize = fattr->du.nfs2.blocksize; | |
977 | } | |
978 | ||
9d1e9232 TM |
979 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
980 | nfsi->change_attr != fattr->change_attr) { | |
981 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
982 | inode->i_sb->s_id, inode->i_ino); | |
983 | nfsi->change_attr = fattr->change_attr; | |
984 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
985 | nfsi->cache_change_attribute = jiffies; | |
ca62b9c3 TM |
986 | } |
987 | ||
1da177e4 LT |
988 | /* Update attrtimeo value if we're out of the unstable period */ |
989 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 990 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 LT |
991 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
992 | nfsi->attrtimeo_timestamp = jiffies; | |
993 | } else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) { | |
994 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) | |
995 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
996 | nfsi->attrtimeo_timestamp = jiffies; | |
997 | } | |
998 | /* Don't invalidate the data if we were to blame */ | |
999 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1000 | || S_ISLNK(inode->i_mode))) | |
1001 | invalid &= ~NFS_INO_INVALID_DATA; | |
24aa1fe6 TM |
1002 | if (data_stable) |
1003 | invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1004 | if (!nfs_have_delegation(inode, FMODE_READ)) |
55296809 | 1005 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1006 | |
1007 | return 0; | |
1008 | out_changed: | |
1009 | /* | |
1010 | * Big trouble! The inode has become a different object. | |
1011 | */ | |
1012 | #ifdef NFS_PARANOIA | |
1013 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", | |
1014 | __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode); | |
1015 | #endif | |
b37b03b7 | 1016 | out_err: |
1da177e4 LT |
1017 | /* |
1018 | * No need to worry about unhashing the dentry, as the | |
1019 | * lookup validation will know that the inode is bad. | |
1020 | * (But we fall through to invalidate the caches.) | |
1021 | */ | |
1022 | nfs_invalidate_inode(inode); | |
1da177e4 | 1023 | return -ESTALE; |
325cfed9 CL |
1024 | |
1025 | out_fileid: | |
1026 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1027 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1028 | NFS_SERVER(inode)->hostname, inode->i_sb->s_id, | |
1029 | (long long)nfsi->fileid, (long long)fattr->fileid); | |
1030 | goto out_err; | |
1da177e4 LT |
1031 | } |
1032 | ||
55a97593 | 1033 | |
1da177e4 LT |
1034 | #ifdef CONFIG_NFS_V4 |
1035 | ||
1da177e4 LT |
1036 | /* |
1037 | * Clean out any remaining NFSv4 state that might be left over due | |
1038 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1039 | * nfs_open(). | |
1040 | */ | |
f7b422b1 | 1041 | void nfs4_clear_inode(struct inode *inode) |
1da177e4 LT |
1042 | { |
1043 | struct nfs_inode *nfsi = NFS_I(inode); | |
1044 | ||
1045 | /* If we are holding a delegation, return it! */ | |
cae7a073 | 1046 | nfs_inode_return_delegation(inode); |
1da177e4 LT |
1047 | /* First call standard NFS clear_inode() code */ |
1048 | nfs_clear_inode(inode); | |
1049 | /* Now clear out any remaining state */ | |
1050 | while (!list_empty(&nfsi->open_states)) { | |
1051 | struct nfs4_state *state; | |
1052 | ||
1053 | state = list_entry(nfsi->open_states.next, | |
1054 | struct nfs4_state, | |
1055 | inode_states); | |
1056 | dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n", | |
1057 | __FUNCTION__, | |
1058 | inode->i_sb->s_id, | |
1059 | (long long)NFS_FILEID(inode), | |
1060 | state); | |
1061 | BUG_ON(atomic_read(&state->count) != 1); | |
1062 | nfs4_close_state(state, state->state); | |
1063 | } | |
1064 | } | |
1da177e4 LT |
1065 | #endif |
1066 | ||
f7b422b1 | 1067 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1068 | { |
1069 | struct nfs_inode *nfsi; | |
1070 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL); | |
1071 | if (!nfsi) | |
1072 | return NULL; | |
55296809 CL |
1073 | nfsi->flags = 0UL; |
1074 | nfsi->cache_validity = 0UL; | |
223db122 | 1075 | nfsi->cache_change_attribute = jiffies; |
458818ed TM |
1076 | #ifdef CONFIG_NFS_V3_ACL |
1077 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1078 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1079 | #endif | |
e50a1c2e BF |
1080 | #ifdef CONFIG_NFS_V4 |
1081 | nfsi->nfs4_acl = NULL; | |
1082 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1083 | return &nfsi->vfs_inode; |
1084 | } | |
1085 | ||
f7b422b1 | 1086 | void nfs_destroy_inode(struct inode *inode) |
1da177e4 LT |
1087 | { |
1088 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
1089 | } | |
1090 | ||
d75d5414 AM |
1091 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1092 | { | |
1093 | #ifdef CONFIG_NFS_V4 | |
1094 | INIT_LIST_HEAD(&nfsi->open_states); | |
1095 | nfsi->delegation = NULL; | |
1096 | nfsi->delegation_state = 0; | |
1097 | init_rwsem(&nfsi->rwsem); | |
1098 | #endif | |
1099 | } | |
f7b422b1 | 1100 | |
1da177e4 LT |
1101 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) |
1102 | { | |
1103 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1104 | ||
1105 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
1106 | SLAB_CTOR_CONSTRUCTOR) { | |
1107 | inode_init_once(&nfsi->vfs_inode); | |
1108 | spin_lock_init(&nfsi->req_lock); | |
1109 | INIT_LIST_HEAD(&nfsi->dirty); | |
1110 | INIT_LIST_HEAD(&nfsi->commit); | |
1111 | INIT_LIST_HEAD(&nfsi->open_files); | |
1112 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
1113 | atomic_set(&nfsi->data_updates, 0); | |
1114 | nfsi->ndirty = 0; | |
1115 | nfsi->ncommit = 0; | |
1116 | nfsi->npages = 0; | |
1da177e4 LT |
1117 | nfs4_init_once(nfsi); |
1118 | } | |
1119 | } | |
1120 | ||
f7b422b1 | 1121 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1122 | { |
1123 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1124 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1125 | 0, (SLAB_RECLAIM_ACCOUNT| |
1126 | SLAB_MEM_SPREAD), | |
1da177e4 LT |
1127 | init_once, NULL); |
1128 | if (nfs_inode_cachep == NULL) | |
1129 | return -ENOMEM; | |
1130 | ||
1131 | return 0; | |
1132 | } | |
1133 | ||
266bee88 | 1134 | static void nfs_destroy_inodecache(void) |
1da177e4 LT |
1135 | { |
1136 | if (kmem_cache_destroy(nfs_inode_cachep)) | |
1137 | printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n"); | |
1138 | } | |
1139 | ||
1140 | /* | |
1141 | * Initialize NFS | |
1142 | */ | |
1143 | static int __init init_nfs_fs(void) | |
1144 | { | |
1145 | int err; | |
1146 | ||
1147 | err = nfs_init_nfspagecache(); | |
1148 | if (err) | |
1149 | goto out4; | |
1150 | ||
1151 | err = nfs_init_inodecache(); | |
1152 | if (err) | |
1153 | goto out3; | |
1154 | ||
1155 | err = nfs_init_readpagecache(); | |
1156 | if (err) | |
1157 | goto out2; | |
1158 | ||
1159 | err = nfs_init_writepagecache(); | |
1160 | if (err) | |
1161 | goto out1; | |
1162 | ||
1da177e4 LT |
1163 | err = nfs_init_directcache(); |
1164 | if (err) | |
1165 | goto out0; | |
1da177e4 LT |
1166 | |
1167 | #ifdef CONFIG_PROC_FS | |
1168 | rpc_proc_register(&nfs_rpcstat); | |
1169 | #endif | |
f7b422b1 | 1170 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1171 | goto out; |
1172 | return 0; | |
1173 | out: | |
1174 | #ifdef CONFIG_PROC_FS | |
1175 | rpc_proc_unregister("nfs"); | |
1176 | #endif | |
1da177e4 | 1177 | nfs_destroy_directcache(); |
6b59a754 | 1178 | out0: |
6b59a754 | 1179 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1180 | out1: |
1181 | nfs_destroy_readpagecache(); | |
1182 | out2: | |
1183 | nfs_destroy_inodecache(); | |
1184 | out3: | |
1185 | nfs_destroy_nfspagecache(); | |
1186 | out4: | |
1187 | return err; | |
1188 | } | |
1189 | ||
1190 | static void __exit exit_nfs_fs(void) | |
1191 | { | |
1da177e4 | 1192 | nfs_destroy_directcache(); |
1da177e4 LT |
1193 | nfs_destroy_writepagecache(); |
1194 | nfs_destroy_readpagecache(); | |
1195 | nfs_destroy_inodecache(); | |
1196 | nfs_destroy_nfspagecache(); | |
1197 | #ifdef CONFIG_PROC_FS | |
1198 | rpc_proc_unregister("nfs"); | |
1199 | #endif | |
f7b422b1 | 1200 | unregister_nfs_fs(); |
1da177e4 LT |
1201 | } |
1202 | ||
1203 | /* Not quite true; I just maintain it */ | |
1204 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1205 | MODULE_LICENSE("GPL"); | |
1206 | ||
1207 | module_init(init_nfs_fs) | |
1208 | module_exit(exit_nfs_fs) |